WO2012102234A1

WO2012102234A1 - Insulating container, and method for operating same

Info

Publication number: WO2012102234A1
Application number: PCT/JP2012/051334
Authority: WO
Inventors: 井出　哲也; 夕香内海; 知子加瀬
Original assignee: シャープ株式会社
Priority date: 2011-01-28
Filing date: 2012-01-23
Publication date: 2012-08-02

Abstract

Provided are an insulating container and a method for driving the insulating container, whereby it becomes possible to store a cold heat in a heat storage material within a relatively short time and it also becomes possible to prevent the formation of frost or dew drops in a refrigerator. An insulating container (50) comprising: a first container (60), a second container (70), and a cooling means (90) for cooling the inside of the first container (60) to a temperature that is lower than the surrounding living temperature and cooling the inside of the second container (70) to a temperature that is lower than the temperature of the inside of the first container (60) in an ordinary operation. The first container (60) has a cold room (63) for cooling a stored material and also has a first heat storage section (66) between a first heat insulation section (65) of the first container (60) and the cold room (63). The first heat storage section (66) is composed of a first material which can cause phase transfer between a liquid phase and a solid phase at a temperature lying between a temperature that can be controlled in the cold room (63) by an ordinary operation and the living temperature surrounding the insulating container (50). The cold room (63) is equipped with a dehumidifier (54), and the cooling means (90) has a cooling mechanism (95) for cooling the inside of the cold room (63) in the same manner as in the inside of the second container (70) that is cooled by an ordinary operation.

Description

Cold storage container and its operation method

The present invention relates to a cold storage container and an operation method thereof.

Conventionally, cold storage containers that store stored items at a temperature lower than the outside temperature (ambient living temperature), such as refrigerators, are known. When such a cold storage container is used, the stored item can be stored at a desired temperature, and therefore, the freshness of various foods as the stored item can be maintained for a long time.

When such a cold storage container is not operated due to a power failure or the like, the temperature of the storage room for storing the stored product is increased so that it approaches the outside temperature. In order to prevent this, the refrigerators proposed in

Patent Documents

1 and 2 are provided with a cold storage material. For example, even if the refrigerator does not operate due to a power failure, it can be stored by supplying cold air to the storage room for a certain period of time. A configuration is employed in which the indoor temperature does not change.

Moreover, as a refrigerator provided with a cold storage material (heat storage material) in this way, as in Patent Document 3, for example, a regenerator composed of a latent heat storage material and a heat exchange refrigerant tube is solidified with the operating capacity of the compressor at night time. In addition, there has been proposed a method in which a freezer compartment is cooled by a compressor and a refrigerator compartment is cooled by a heat accumulator only for a predetermined time in a daytime period.

JP 58-219379 A Japanese Patent Laid-Open No. 7-4807 JP-A-6-174354

However, in the refrigerator of Patent Document 3, a heat accumulator composed of a refrigerant pipe and a heat accumulator must be provided in addition to the conventional cooler, and there is a problem that the configuration becomes complicated and the cost increases accordingly.
Moreover, in the refrigerator using a cool storage material (heat storage material), when performing cold preservation, it is necessary to first store cold heat in the heat storage material. However, in particular, when a latent heat storage material is used as the heat storage material, it takes a long time to store the cold energy. Therefore, when the inside of the cabinet is warmed to room temperature, such as at the time of new purchase, it takes time to cool the heat storage material to a predetermined state in order to make the heat storage effect of the heat storage material function, and steady operation is performed. There is a problem that it takes a long time to perform.

Furthermore, since the cooler must function for a long time in order to cool the heat storage material, energy loss increases.
In addition, when it is desired to use late-night power with a low usage fee, it may take time to cool the heat storage material to a predetermined state.
Furthermore, a method of cooling the heat storage material in the freezer in a short time can be considered, but it is inconvenient because the heat storage material must be transferred between the freezer and the refrigerator before and after cooling, and the heat storage material is cooled after cooling. Therefore, the temperature change in the refrigerator becomes large, and there are problems such as frost and condensation in the refrigerator.

The present invention has been made in view of the above circumstances, and can store the cold energy in the heat storage material in a relatively short time. In addition, the mechanism for storing such cold energy has a simple configuration and the cost increases. It is intended to provide a cold storage container and a method of operating the same that suppresses frost and condensation in the refrigerator.

The cold storage container of the present invention is a cold storage container for stored goods having an electrical cooling function, and the first container that stores the stored goods at a temperature lower than the living temperature around the cold storage container in the steady operation, and the steady operation And the second container for storing the stored material at a temperature lower than that of the first container, and the interior of the first container is cooled to a temperature lower than the surrounding living temperature in steady operation, and the interior of the second container is Cooling means for cooling to a temperature lower than that of the container, wherein the first container has a first container body and a first lid member capable of opening and closing a space in the first container body, the first container The space surrounded by the container main body and the first lid member forms a refrigeration chamber for refrigerated storage, and the first container main body and the first lid member are provided to surround the refrigeration chamber. A first heat insulating part, the refrigerator compartment and the first heat insulating part A first heat storage section provided at least partially between the first heat storage section and a temperature that is controllable in the refrigerator compartment during normal operation and a living temperature around the cold storage container. Formed by using a first material made of one or more materials that cause a phase transition between a liquid phase and a solid phase at a temperature. The refrigerator is provided with a dehumidifier, and the cooling means includes the refrigerator It has the cooling mechanism which cools the room | chamber interior similarly to the inside of the said 2nd container cooled by steady operation.

In the cold storage container, in the temperature distribution formed in the refrigeration chamber due to the change over time after the electrical cooling function is stopped from the steady operation state, it is in the vicinity of the first region that is relatively close to the living temperature. The part of the first heat storage unit that is disposed is more thermally conductive than the other part of the first heat storage unit that is disposed in the vicinity of the second region that is difficult to approach the living temperature. It is preferable that the value divided by the amount of use per unit area of the wall surface is small.

In the cold storage container, the second container has a second container main body and an opening / closing mechanism that allows opening and closing of the space in the second container main body, and the space in the second container main body stores stored items. A freezing chamber for freezing is formed, and the second container body is provided at least in part between a second heat insulating portion provided to surround the freezing chamber, and the freezing chamber and the second heat insulating portion. The second heat storage unit, and the second heat storage unit has a liquid phase and a solid phase at a temperature between a temperature controllable in the freezer compartment and a living temperature around the cold storage container in a steady operation. It is preferably formed using a second material made of one or more materials that cause a phase transition between the phases.

In the cold storage container, the first container is provided with a temperature adjustment mechanism for adjusting the temperature in the refrigerator compartment, and the first material has a peak temperature of a phase transition temperature at the time of solidification, the temperature adjustment. It is preferable to be included in the temperature range in the refrigerator compartment which can be adjusted by a mechanism.

In the cold storage container, when the refrigeration chamber is cooled by the cooling mechanism in the same manner as the inside of the second container that is cooled in a steady operation, in the region where the discharge amount of cold heat is relatively large in the first container, A hygroscopic material that generates heat upon moisture absorption is preferably disposed.
The hygroscopic material is preferably a porous material.
Furthermore, the porous material is preferably zeolite.
Moreover, it is preferable that the said moisture absorption material is imogolite.
The hygroscopic material is preferably mesoporous silica.

It is preferable that the cold storage container includes a third container and a humidifying mechanism that uses water obtained when the dehumidifier is dehumidified in the refrigerator to humidify the third container.

The cold storage container of the present invention is a cold storage container for stored goods having an electrical cooling function, and the first container that stores the stored goods at a temperature lower than the living temperature around the cold storage container in the steady operation, and the steady operation And the second container for storing the stored material at a temperature lower than that of the first container, and the interior of the first container is cooled to a temperature lower than the surrounding living temperature in steady operation, and the interior of the second container is A cooling means for cooling to a temperature lower than that of the container, and a hygroscopic material that is disposed in a region where the discharge amount of the cold heat is relatively large in the first container and generates heat during moisture absorption, the first container being the first container And a first lid member that allows opening and closing of a space in the first container body, and the space surrounded by the first container body and the first lid member is a refrigeration chamber that refrigerates stored items. The first container body And the first lid member includes a first heat insulating portion provided to surround the refrigerator compartment, and a first heat storage portion provided at least partially between the refrigerator compartment and the first heat insulating portion. The first heat storage unit has a phase transition between a liquid phase and a solid phase at a temperature between a temperature controllable in the refrigerator compartment and a living temperature around the cold storage container in a steady operation. It is formed using the 1st material which consists of 1 or more types of materials.

The operation method of the cold storage container of the present invention is the operation method of the cold storage container, and first, in the non-steady operation prior to the steady operation, the inside of the refrigerator is dehumidified by the dehumidifier, and then the cooling mechanism The refrigerator is cooled in the same manner as in the second container that is cooled in a steady operation to cool the first material of the first heat storage unit, and then the steady operation is performed.

According to the cold storage container and its operation method of the present invention, it is possible to store the cold heat in the heat storage material (material of the heat storage section) in a relatively short time, and the mechanism for storing such cold heat has a simple configuration. Therefore, it is possible to suppress the increase in cost, and it is possible to suppress the formation of frost and condensation in the refrigerator compartment.

It is explanatory drawing which shows the refrigerator of a 1st example. It is a graph which shows typically the thermal behavior when the material of a thermal storage part raise | generates a phase transition. It is explanatory drawing which shows the refrigerator of a 1st example. It is explanatory drawing which shows the modification of the refrigerator of a 1st example. It is a calculation model for calculating | requiring the temperature distribution in the cross section of the horizontal direction of a refrigerator. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is explanatory drawing which shows a calculation model. It is a graph which shows the relationship of the temperature with respect to the distance to the internal direction of a refrigerator. It is a Heisler diagram which shows the heat transfer with respect to a solid. It is a graph which shows the relationship of the heat retention possible time with respect to the thickness of a thermal storage part. It is a calculation model for calculating | requiring the temperature distribution in the cross section of the horizontal direction of a refrigerator. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is a figure which shows the result of unsteady heat conduction analysis using a calculation model. It is explanatory drawing which shows the refrigerator of a 2nd example. It is explanatory drawing which shows the refrigerator of a 2nd example. It is explanatory drawing which shows the refrigerator of a 3rd example. It is a perspective view which shows schematic structure of the cold storage container of 1st Embodiment. It is the simplified sectional side view of the cold storage container of 1st Embodiment. It is a graph which shows the adsorption isotherm of water. It is the simplified sectional side view of the cold storage container of 2nd Embodiment. (A)-(c) is the principal part enlarged view for demonstrating the effect | action in a packing part. It is the side sectional view which simplified the cold storage container of 3rd Embodiment. (A), (b) is a principal part enlarged view for demonstrating the effect | action in a packing part. It is the simplified sectional side view of the storage container of 4th Embodiment. It is 5th Embodiment, Comprising: It is a figure which shows the method of calculating | requiring the phase transition temperature of the thermal storage material used with a storage container. It is the simplified sectional side view of the cold storage container of 6th Embodiment. (A), (b) is a principal part enlarged view for demonstrating the effect | action in a packing part.

First, prior to the description of the embodiments of the present invention, a refrigerator serving as a basic configuration of the cold insulation container of the present invention will be described with reference to the drawings. In the following drawings, the dimensions and ratios of the constituent elements are appropriately changed in order to make the drawings easy to see.
1A and 1B are views showing a first example of a refrigerator according to the present invention, in which FIG. 1A is a schematic perspective view, and FIG. 1B is a schematic cross-sectional view. The refrigerator 1 is a basic configuration of the first container in the cold storage container of the present invention described later, and is used for storing stored items at a temperature lower than the outside air temperature during steady operation.

As shown in FIGS. 1A and 1B, the refrigerator 1 of the present example includes a container body 10 having a refrigeration room (storage room) 100 communicating with the outside through an opening 101, and a door member attached to the opening 101. (Lid material) 20. The refrigerator compartment 100 is a space surrounded by the wall material 11 constituting the container body 10 and the wall material 21 constituting the door member 20. The container body 10 is provided with a heat insulating part 12 and a heat storage part 14, and the door member 20 is also provided with a heat insulating part 22 and a heat storage part 24. The heat storage unit 14 and the heat storage unit 24 are provided in a position adjacent to the packing P so as to be thicker (the volume is larger) than other positions.

In such a refrigerator 1, the inside of the refrigerator compartment 100 can be kept at a predetermined set temperature during steady operation. For example, even when the power supply is stopped due to a power failure and the operation is stopped, it will be described in detail below. In addition, it is possible to keep the refrigeration room 100 cool for a certain period of time so that no temperature distribution occurs.

The container body 10 has a wall material 11 and a cooling device 19 for cooling the inside of the refrigerator compartment 100. The wall material 11 includes a heat insulating portion 12 provided so as to surround the refrigerator compartment 100, and a heat storage portion 14 provided so as to surround the refrigerator compartment 100 between the refrigerator compartment 100 and the heat insulating portion 12. These are accommodated in a space surrounded by a casing (not shown) made of a resin material such as ABS resin.

The heat insulation part 12 insulates the refrigerator compartment 100 and the heat storage part 14 that are cooled during steady operation so that heat from the outside is not transmitted through the housing. Such a heat insulating part 12 is made of a generally known forming material such as a fiber heat insulating material such as glass wool, a foamed resin heat insulating material such as polyurethane foam, or a natural fiber heat insulating material such as cellulose fiber. Can be formed.

The heat storage unit 14 is formed using a material that causes a phase transition between the liquid phase and the solid phase as a heat storage material at a temperature between the set temperature of the refrigerator compartment 100 and the outside air temperature. Here, the “set temperature of the refrigerator compartment 100” is a preset temperature in the refrigerator compartment 100 during steady operation of the refrigerator 1. The “outside air temperature” is, for example, a temperature assumed as an outside air temperature in an environment where the refrigerator 1 is used. For example, if the refrigerator 1 is a refrigerator having a set temperature of 3 ° C. and the assumed outside air temperature is 25 ° C., the heat storage unit 14 uses a heat storage material having a solid-liquid phase transition temperature higher than 3 ° C. and lower than 25 ° C. Formed.

FIG. 2 is a graph schematically showing the thermal behavior when the heat storage material, which is the material forming the heat storage section 14 shown in FIG. 1, causes a phase transition. The horizontal axis of the graph represents temperature, and the vertical axis represents specific heat.
As shown in FIG. 2, in the case of a solid state (solid phase), the heat storage material is heated by absorbing the amount of heat corresponding to the specific heat C (s), and in the case of a liquid state (liquid phase), The temperature is raised by absorbing the amount of heat corresponding to the specific heat C (l). In contrast, at a temperature at which the heat storage material undergoes phase transition, the temperature is increased by absorbing the amount of heat corresponding to the latent heat.

Here, “specific heat” is the amount of heat required to raise the temperature of a substance of unit mass by the unit temperature, and therefore, in the temperature range where the phase transition occurs, the amount of heat absorbed to increase by the unit temperature corresponds to the latent heat. . Therefore, as shown in FIG. 2, in the phase transition temperature region Tf, the heat storage material can be considered to rise by a unit temperature by absorbing the amount of heat corresponding to the specific heat C (f), and the specific heat of the heat storage material is large. You can think of it. Therefore, if the phase transition temperature of the heat storage material is a temperature between the set temperature of the refrigerator compartment 100 and the outside air temperature, the phase transition temperature region in the process of raising the internal temperature when the operation of the refrigerator compartment 100 is stopped. Since Tf is reached, it is possible to suppress a temperature change for a long time in the temperature range.

For such a heat storage material, a material in the phase transition temperature region Tf having an appropriate temperature is used according to the set temperature of the refrigerator compartment 100, that is, according to the specifications of the refrigerator 1.
For example, since the set temperature of the refrigerator compartment 100 is about 3 ° C. to 5 ° C., the peak temperature of the phase transition temperature of the heat storage material is preferably about 6 ° C. to 7 ° C.

For example, in the case of a heat storage material used in a freezer (freezer room) in a cold storage container according to the present invention, which will be described later, instead of the refrigerator 100, the set temperature of the freezer room is about −18 ° C. The peak temperature of the phase transition temperature is preferably −16 ° C. to −6 ° C. In the case of the heat storage material used in the chilled chamber, the set temperature of the chilled chamber is about 0 ° C., so the peak temperature of the phase transition temperature of the heat storage material is preferably 0 ° C. to 2 ° C.

Here, the phase transition temperature of the heat storage material can be measured using a differential scanning calorimeter (DSC). The above-mentioned peak temperature can be measured as a peak temperature when a phase transition from a liquid phase to a solid phase occurs, for example, when a differential scanning calorimeter is used and the temperature decrease rate is 1 ° C./min.
Further, the phase transition temperature range is a temperature range between the set temperature in the refrigerator compartment 100 and the outside air temperature in the steady operation, and the phase transition from the liquid phase to the solid phase occurs.

The heat storage material having such a phase transition temperature is cooled to the phase transition temperature or lower by cold air transmitted from the refrigerator compartment 100 when the refrigerator compartment 100 is cooled during operation, and becomes a solid phase by being stored cold. Moreover, even if the refrigerator 1 stops operation in that state, the temperature change in the refrigerator compartment 100 can be suppressed by supplying cold air into the refrigerator compartment 100 for a certain period of time.

As the heat storage material, for example, water, paraffin, 1-decanol, SO ₂ · 6H ₂ O, C ₄ H ₃ O · 17H ₂ O, (CH ₂ ) 3N · 10 1/4 H ₂ O, and the like are usually known materials. Can be used. It is also possible to appropriately adjust a heat storage material having a desired phase transition temperature by utilizing a freezing point depression generated by dissolving a solute in a liquid heat storage material.

3A and 3B are explanatory views showing the structure of the wall material 11. As shown in FIG. 3A, the heat storage unit 14 includes a heat storage material 141 and a protective film 142 that wraps the heat storage material 141, and the casing 18 of the container body 10 and the heat insulation provided in the casing 18. A configuration in which the space between the portions 12 is filled can be employed. 3B, a plurality of small blocks (indicated by

reference numerals

14a and 14b) formed of a heat storage material 141 and a protective film 142 in a space between the casing 18 and the heat insulating portion 12 are provided. You may form the thermal storage part 14 by filling.

Further, the heat storage material 141 may have a configuration capable of maintaining the shape at the time of a solid-liquid phase change by gelation treatment or the like. In this case, since the shape can be maintained and leakage can be prevented only by the heat storage material 141, the protective film 142 is not necessarily required.
Further, the heat storage material 141 may be configured in a slurry form by microencapsulation or the like. In this case, since the volume change at the time of the solid-liquid phase change can be prevented, the thermal resistance at the contact surface between the heat storage material 141 and the other member can be kept constant.

Returning to FIG. 1, the cooling device 19 is a gas compression type cooling device, provided at the bottom of the container body 10, provided to be exposed to the compressor 191 that compresses the refrigerant, and the refrigerating chamber 100. It has a cooler 192 that cools the surroundings by the heat of vaporization when the compressed refrigerant evaporates, and a pipe 193 that connects the compressor 191 and the cooler 192. In addition, a normally known configuration such as a condenser for radiating heat from the compressed refrigerant or a dryer for removing moisture in the refrigerant may be provided.

In addition, although the gas compression type cooling device is shown here, the present invention is not limited to this, and a gas absorption type cooling device or an electronic cooling device using a Peltier element may be used. Further, here, the refrigerator 1 is illustrated as being a direct cooling type (cold air natural convection method) in which the cooler 192 is exposed to the refrigerator compartment 100. However, the present invention is not limited to this, and it is also possible to adopt a cold type (cold air forced circulation method) in which the cold air cooled by the cooler 192 is circulated by a fan to cool the refrigerator compartment 100.

On the other hand, the door member 20 is rotatably attached to the container body 10 via a connecting member such as a hinge (not shown), and is configured to open and close the opening 101. The door member 20 is provided with a packing P on the side in contact with the container body 10 when closed.
Similarly to the container main body 10, the door member 20 also includes a heat insulating portion 22 provided surrounding the refrigerating chamber 100, and a heat storage portion 24 provided surrounding the refrigerating chamber 100 between the refrigerating chamber 100 and the heat insulating portion 22. The wall material 21 provided with these. The heat insulation part 22 and the heat storage part 24 can be formed using the same material as the heat insulation part 12 and the heat storage part 14 mentioned above.

In such a refrigerator 1, the heat storage part 14 and the heat storage part 24 have a thickness of the heat storage material at a position adjacent to the packing P (indicated by the symbol α in FIG. 1) via the casing of the container body 10 and the door member 20. It is provided to be thick in the direction.
The schematic configuration of the refrigerator 1 of this example is as described above.

FIG. 4 is an explanatory view showing a modification of the refrigerator of this example, and corresponds to FIG.
The temperature in the refrigeration room (storage room) 100 is raised by a change over time after the refrigerator is stopped, and a temperature distribution is gradually formed. Then, relatively warm air stays in the upper part of the refrigerating chamber 100 and relatively cool air stays in the lower part of the refrigerating chamber due to the change in air density. In other words, the upper part of the refrigerator compartment is relatively closer to the outside air temperature than the lower part of the refrigerator compartment. In order to suppress the formation of such a temperature distribution, the following configuration is adopted in the modified example of the refrigerator of this example.

In the refrigerator 2 shown in FIG. 4 (a), the wall material 11 at the upper part (ceiling part) of the refrigerating room 100 is more of the heat storage part 14 provided inside than the wall material 11 at the lower part (bottom part) of the refrigerating room 100. The volume is increasing. In the figure, it is shown that the heat storage unit 14 in the region indicated by the symbol β is larger than the heat storage unit 14 in the region indicated by the symbol γ.

Moreover, in the refrigerator 3 shown in FIG. 4B, the heat storage unit 14 provided in the wall material 11 is provided on the upper side heat storage unit 15 provided on the upper side of the refrigerator compartment 100 and on the lower side of the refrigerator compartment 100. And the lower heat storage unit 16 formed. Similarly, the heat storage part 24 provided in the wall material 21 of the door member 20 includes an upper heat storage part 25 provided on the upper side of the refrigerator compartment 100 and a lower heat storage part 26 provided on the lower part side of the refrigerator compartment 100. And is composed of. The upper heat storage unit 15 is formed using a forming material having a larger amount of latent heat than the lower heat storage unit 16. Similarly, the upper heat storage unit 25 is formed using a forming material having a larger amount of latent heat than the lower heat storage unit 26.

As a result, cold air is supplied to the upper part of the refrigerating room 100 for a longer time than the lower part. Therefore, the warm air that tends to stay in the upper part of the refrigerating room 100 is cooled, and the temperature difference from the cold air in the lower part is reduced. Can be small. Therefore, in the

refrigerators

2 and 3 having such a configuration, formation of a temperature distribution can be suppressed.

Next, the refrigerator 1 of this example will be described in more detail with reference to FIGS. 5 to 13 while considering the thermal characteristics of the heat storage unit. In the following description, the symbols used in FIG. 1 may be used as appropriate.

First, the heat storage material of the heat storage part is examined.
The thermal characteristics of the heat storage unit were obtained by simulation using a two-dimensional model shown in FIG. FIG. 5 is a calculation model for obtaining the temperature distribution in the horizontal section of the refrigerator 1. Here, by calculating the refrigerator 1 as a substantially rectangular parallelepiped, calculation was performed in a half region in consideration of symmetry in the cross section.

In the figure, reference signs W1 and W2 are internal dimensions of the refrigerator compartment 100, reference sign W3 is the thickness of the heat insulating part 22 constituting the wall member 21, and reference signs W4 and W5 are thicknesses of the heat insulating part 12 constituting the wall member 11. Reference sign W6 is the thickness of the packing P provided at the joint between the container body 10 and the door member 20, and W7 is the thickness of the

heat storage parts

14, 24 constituting the wall material. Each value is W1: 400 mm, W2: 500 mm, W3: 45 mm, W4: 45 mm, W5: 35 mm, W6: 1 mm, and W7 is a variable.

6 and 7 are diagrams showing the results of unsteady heat conduction analysis using the calculation model shown in FIG. FIG. 6 shows the temperature of the refrigerating room 100 when there are no heat storage units 14 and 24 (W7 = 0 mm), and FIG. 7 shows the case where there are heat storage units 14 and 24 (W7 = 5 mm) using paraffin as a heat storage material. The temperature of the refrigerator compartment 100 is shown. (A) shows the temperature after 1 hour, and (b) shows the temperature after 12 hours.

Calculation conditions are: melting point of paraffin (phase transition temperature): 5.9 ° C., latent heat: 229 kJ / kg, start temperature: 3 ° C., outside air temperature: 25 ° C., packing P material: iron, heat storage material filling in heat storage section Rate: 100%.

As shown in FIG. 6, in the absence of the

heat storage units

14, 24, the temperature in the refrigerator compartment 100 has already risen to a few ten degrees C. after one hour (FIG. 6 (a)), and after 12 hours. It is completely equal to the outside air temperature (FIG. 6B). On the other hand, as shown in FIG. 7, when there are the

heat storage units

14 and 24, the temperature in the refrigerator compartment is maintained at about 5 ° C. after 1 hour (FIG. 7A), and after 12 hours. It was also found that the temperature can be maintained at about 7 to 8 ° C. (FIG. 7B).

Further, as is apparent from FIG. 7, the inflow of heat into the refrigerator compartment 100 of the refrigerator 1 after operation is stopped mainly at the position of the packing P, and the heat is transferred from the packing P portion to the inside of the refrigerator compartment 100. . Then, next, the performance of the heat storage part was examined by performing a simulation considering heat transfer.

FIG. 8 is a calculation result for a model in which only the physical properties of the heat storage material constituting the heat storage unit are made different, and corresponds to FIGS. Here, the calculation was performed assuming two types of heat storage materials having the same phase transition temperature and different latent heat values and thermal conductivities. Calculation conditions other than the heat storage material are the same as those in FIGS. 6 and 7 except that the phase transition temperature is −18 ° C. and the start temperature is −18 ° C.

The heat storage material in FIG. 8A has latent heat: 334 kJ / kg, thermal conductivity: 2.2 W / (m · K), and the heat storage material in FIG. 8B has latent heat: 229 kJ / kg, thermal conductivity: 0.34 W / (m · K). The value of the latent heat and thermal conductivity of the heat storage material used in the calculation of FIG. 8A is about the same as that of ice, and the value of the latent heat and thermal conductivity of the heat storage material used in the calculation of FIG. The same level as paraffin.

8 (a) and 8 (b) show the temperature distribution after 12 hours. As is clear from the figure, the temperature rise in FIG. 8 (b) is lower than that in FIG. 8 (a). You can see that
Further, FIG. 9 shows the calculation result of the model under the same condition as FIG. 8A except that there is no packing P, that is, the refrigerator compartment 100 is sealed with wall materials (heat insulation part and heat storage part). It can be seen that the model with a simple structure can suppress the temperature rise in the refrigerator even after 12 hours.

From these calculation results, in the structure of the cold storage container having the packing P, the inflow of heat from the packing P part is the main factor of the temperature change in the refrigerator compartment, and the heat storage material provided in the heat storage part provided in the vicinity of the packing P It can be understood that the viewpoint is insufficient only by selecting only the magnitude of the latent heat. That is, it has been found that in order to select a suitable heat storage material as a material for forming the heat storage section, attention should be paid to the thermal conductivity as well as the latent heat value.

As a result of repeated studies by the present inventors based on these calculation results, it has been found that it is effective to evaluate the material for forming the heat storage section using the temperature conductivity represented by the following formula (1). It was.

(Α: temperature conductivity (m ² / s), k: thermal conductivity (W / (m · K)), ρ: density of the material for forming the heat storage part (kg / m ³ ), C: formation of the heat storage part Specific heat of material (J / (kg · K))

Here, the specific heat in the equation is used as latent heat in the phase transition temperature range. Specific heat is the amount of heat required to raise the temperature of the heat storage material by 1 ° C. Therefore, when the phase transition temperature range is, for example, 2 ° C., the total latent heat amount is divided by the temperature width of the phase transition temperature range, The specific heat used in the above equation 1 can be obtained.
The above temperature conductivity is obtained for ice and paraffin as shown in Table 1 below.

In other words, paraffin has a lower latent heat than ice, but its temperature conductivity is small, that is, the temperature is hard to rise, so the time until the phase transition is completed is longer than that of ice, and as a result, the phase transition temperature for a long time. Can be maintained. Therefore, comparing ice and paraffin, it can be seen that paraffin having a low temperature conductivity has a higher heat retention effect when heat flows in. That is, when ice and paraffin are compared, a high cooling effect can be exhibited by using paraffin as a material for forming the heat storage portion of the packing P portion in the position where heat flows in, in this example.

Next, the thickness of the heat storage unit 14 will be examined.
As described above, in the refrigerator 1 shown in FIG. 1, the heat storage unit 14 and the heat storage unit 24 are adjacent to the packing P via the casing of the container body 10 and the door member 20 (indicated by reference numeral α in FIG. 1). The heat storage material is provided so as to be thick in the thickness direction. According to another expression, the heat storage unit 14 and the heat storage unit 24 at the position indicated by the symbol α are units in which the temperature conductivity of the material is viewed from the inner wall of the refrigerator compartment 100 as compared with the heat storage units at other positions. The index value, which is a value divided by the amount of material used per area, is set to be small. This is due to the following reason.

When the refrigerator 1 stops operation, external heat flows into the refrigerator compartment 100 mainly through the packing P to raise the temperature inside. This is because the container main body 10 and the door member 20 are in contact with each other via the packing P, so that the

heat insulating portions

12 and 22 and the

heat storage portions

14 and 24 of the refrigerator 1 are discontinuous in the packing portion. That is, in the refrigerator compartment 100, the vicinity of the packing P is a region (first region AR1) that is relatively more likely to approach the outside air temperature than the region far from the packing P (second region AR2). Can do.

Therefore, in the refrigerator 1 of this example, the heat storage part 14 is not arranged uniformly, but the wall material 11 in the vicinity of the packing P, which is a part relatively close to the outside air temperature after the operation is stopped, is relatively outside. The heat storage part 14 is provided thicker (so that the above-mentioned index value becomes smaller) than the wall material 11 of the part that is difficult to approach the temperature. As a result, the temperature is less likely to rise in the vicinity of the packing P as compared to a position far from the packing P, and cold air is supplied for a long time. Therefore, even if the operation is stopped, it is easy to maintain the temperature in the refrigerator compartment so that no temperature distribution occurs for a certain period of time.

As the material of the

heat storage units

14 and 24 provided in the vicinity of the first region AR1, the temperature conductivity of the material at the phase transition temperature is higher than the material of the

heat storage units

14 and 24 provided in the vicinity of the second region AR2. It is good also as controlling an index value as using a thing with small.

Further, the

heat storage units

14 and 24 provided in the vicinity of the first region AR1 are provided so that the total latent heat amount is larger than that of the

heat storage units

14 and 24 provided in the vicinity of the second region AR2. The index value may be controlled as being. From the above formula (1), the denominator of temperature conductivity has a term of specific heat, that is, latent heat in the phase transition temperature region. In addition, the above-described index value has a product of specific heat and usage, that is, a term of total latent heat in the denominator. Therefore, since the index value decreases as the total latent heat amount increases, the above idea is met.

In this way, the region that is easily accessible to the outside air temperature is referred to as the first region, and the region that is not easily approached to the outside air temperature is referred to as the second region. This is not to divide into only one area. For example, if there is a region where the thickness of the heat insulating material is thin, the heat insulating performance of the region is low, and it is easier to approach the outside air temperature than the other parts, but it approaches the outside air temperature when compared with the packing part. It will be difficult. Even when there are three or more different regions as in this example, a relative comparison between the two regions is shown as a first region and a second region.
Here, the thicker the heat storage unit 14, that is, the greater the amount of latent heat stored in the heat storage unit 14, the smaller the above-mentioned index value, and it is possible to release cold air for a long time. Therefore, the temperature rise of the refrigerator compartment 100 after an operation stop can be suppressed. On the other hand, when the heat storage part 14 is excessively thick, it is expected that the manufacturing cost and the shape / size of the product are adversely affected.

Therefore, for example, the thickness of the heat storage unit 14 reaches the maximum temperature (allowable temperature) allowed as the temperature of the refrigerator compartment 100 even after a predetermined time (heat retention time) has elapsed after the operation is stopped. It is good to have a thickness necessary to satisfy the requirement of not.
The heat insulation possible time is calculated on the assumption that there is no heat load other than the components in the refrigerator compartment 100, that is, the refrigerator compartment 100 has no special heat source for raising the temperature in the cabinet after the operation is stopped.・ It is set.

The thickness of the heat storage unit 14 can be obtained as follows in consideration of the heat inflow / transfer described above.
First, in order to simplify the calculation, a composite thermal conductivity in the case where the thickness of the wall material is equal to the thickness of the heat storage unit 14 is obtained from an expression representing the heat flux that passes through the heat insulating unit 12 and the heat storage unit 14. .

That is, as shown in FIG. 10A, the wall material 11 includes a heat insulating portion 12 having a thickness L ₁ and a thermal conductivity k ₁ , and a heat storage portion 14 having a thickness L ₂ and a thermal conductivity k _2. The calculation model is replaced by a calculation model having a wall material 17 formed of a virtual material having a thickness L ₂ and a thermal conductivity k ₁₂ as shown in FIG. 10B. To obtain the thermal conductivity of the wall material 17.

When a predetermined amount of heat flows into the refrigerating chamber 100 from the outside, the amount of heat is expressed by the following equation (2) for the calculation model of FIG. 10A, and the following equation ( 3). Therefore, from equations (2) and (3), the thermal conductivity of the wall material 17 in FIG. 10B, that is, the combined thermal conductivity of the heat insulating portion 12 and the heat storage portion 14 is obtained as the following equation (4).

(Q: amount of heat (W), T ₁ : outside air temperature (K), T ₂ : set temperature (K) in the refrigerator compartment, L ₁ : thickness of heat insulating part (m), L ₂ : thickness of heat storage part ( m), k ₁ : thermal conductivity of the heat insulation part (W / (m · K)), k ₂ : thermal conductivity of the heat storage part (W / (m · K)) k ₁₂ : between the heat insulation part and the heat storage part Synthetic thermal conductivity (W / (m · K))

Next, the structure of the refrigerator 1 is simplified, and the inflow of heat to the simplified structure is examined. FIG. 11 is a graph showing the relationship of temperature with respect to the distance from the external surface of the refrigerator to the internal direction.

As shown in FIG. 11 (a), the heat of the outside of the refrigerator is transferred to the refrigerating room through the wall material, so that the temperature of the wall material is equal to the outside air temperature on the external surface and equal to the refrigerating room temperature on the internal surface. Further, the temperature changes in the thickness direction. Moreover, since the air in a refrigerator compartment has a small heat capacity, it can be assumed that it is the same temperature as the inner wall of a refrigerator compartment. Such a relationship is the same even when the operation is stopped or when the temperature of the refrigerator compartment reaches the allowable temperature after a predetermined time has elapsed.

Therefore, it is considered that the temperature change of the refrigerator compartment can be found by calculating the temperature change of the inner wall of the refrigerator compartment, and is calculated using a calculation model in which the space of the refrigerator compartment is discarded as shown in FIG. Thus, the temperature in the refrigerator compartment is indirectly calculated. In the figure, since the thickness of the wall material is L ₂ , the model shown in FIG. 11B calculates the temperature distribution for a solid solid with a thickness of 2L ₂ and calculates the center of the solid (L from the surface). ₂ ), the temperature in the refrigerator compartment can be calculated.

In the calculation of heat transfer from the surface of such a solid (refrigerator in a refrigerator) to the interior of the solid, the initial temperature and external temperature of the solid are used, and the basic equation of unsteady heat conduction is solved by general heat transfer calculation. Can be calculated. Regarding the temperature change due to heat transfer to the center of the solid body, a Heisler diagram shown by the relationship between dimensionless temperature and dimensionless time (Fourier number) as shown in FIG. 12 is known. Using the figure, the temperature change inside the solid body can also be obtained.

The dimensionless time (Fourier number) indicated by the horizontal axis of the Heisler diagram of FIG. 12 is the temperature conductivity of the solid, the elapsed time from the shutdown, and the thickness to the center of the solid (that is, the thickness of the wall material). It can be shown as the following formula (5).

(F _o : dimensionless time (Fourier number), α: temperature conductivity (m ² / s), t: elapsed time (s), L ₂ : wall material thickness (m))

In addition, the dimensionless temperature indicated by the vertical axis of the Hessler diagram of FIG. 12 is expressed by the following formula (6) using the outside air temperature, the set temperature of the refrigerator compartment, and the temperature of the refrigerator compartment that changes due to operation stop. Can do.

(Θ _c : dimensionless temperature, T ₁ : outside air temperature (K), T ₂ : set temperature (K) in the refrigerator compartment, T ₃ : temperature in the refrigerator compartment (K))

Among the variables indicating the dimensionless temperature, since the outside air temperature T ₁ and the set temperature T ₂ have set values, the corresponding Fourier numbers can be obtained by setting the allowable temperature of the refrigerator compartment 100. When obtaining the Fourier number from the Heisler diagram shown in FIG. 12, it may be directly read from the figure, or may be calculated using the following approximate expression (7). The approximate expression (7) is an approximate expression for the graph shown for the flat plate in FIG.

Further, among the Fourier numbers represented by the above equation (5), the temperature conductivity can be calculated using the above-described equations (1) and (4), and therefore, the Fourier number obtained from the Heisler diagram, Using the equation (5), a function of the thickness of the wall material (that is, the thickness of the heat storage unit) and the elapsed time from the operation stop can be obtained.

FIG. 13 is a graph showing the relationship between the thickness of the heat storage unit and the heat retention time (elapsed time from the operation stop) obtained according to the above concept. In the figure, a plurality of heat storage materials are calculated.

It should be noted that the heat retention time occupies most of the time from the start of the phase change to the completion of the phase change of the heat storage material in the heat storage section. Therefore, in the figure, when the temperature in the refrigerator compartment changes from 5 ° C to 7 ° C when the phase change temperature range of the paraffin is 5 ° C to 7 ° C and the outside air temperature is 25 ° C, it corresponds to the thickness of the heat storage part. It is calculated about the warming time.

When the relationship shown in FIG. 13 is used, for example, when the time until the allowable temperature is reached after the operation is stopped can be obtained, the necessary thickness of the heat storage unit can be obtained, so that a cold storage container having a desired specification can be obtained. Further, by using the relationship shown in FIG. 13, it is possible to estimate the time from when the operation of a certain cold container is stopped until the temperature is raised to the allowable temperature, that is, the warmable time.
As described above, the arrangement, material, and thickness of the heat storage unit are set to obtain a cold-insulated container having a desired specification.

Here, the present inventors performed a simulation on the thermal characteristics of the heat storage section in order to demonstrate the effect of the heat storage section provided in accordance with the above-mentioned idea. As the calculation model, the calculation model shown in FIGS. 5 and 14 was used.

FIG. 14 corresponds to the calculation model of FIG. 5 and further includes parameters W8 and W9. W8 and W9 are the lengths from the end of the heat storage part at the part in contact with the packing P. Table 2 below summarizes the parameters used for the calculation.

FIGS. 15A and 15B show calculation results of unsteady heat conduction analysis using the calculation model of FIG. The values of the symbols W1 to W7 are the same as in FIG. 7 (W7 = 5 mm).
Further, FIGS. 16A and 16B are calculation results of unsteady heat conduction analysis using the calculation model of FIG. The symbols W1 to W6 are the same as those in FIG. About the thickness of the

thermal storage parts

14 and 24, it was set to W7 = 20mm between W8 = 40mm and W9 = 20mm from the edge part, and was set to W7 = 2mm about the other part.

15 (a) and 16 (a) show the temperature after 6 hours, and FIGS. 15 (b) and 17 (b) show the temperature after 8 hours.

As a result of the calculation, as shown in FIG. 15, when the heat storage unit 14 is formed with a uniform thickness, a temperature distribution is already formed in the refrigerator compartment 100 after 6 hours (FIG. 15 (a)). )) After 8 hours, the temperature in the refrigerator compartment 100 has risen to nearly 20 ° C. (FIG. 15B). On the other hand, as shown in FIG. 16, when the heat storage part 14 has many distributions around the packing P and the other parts have a small distribution, the temperature in the refrigerating room 100 is several hours after 6 hours. It was found that the temperature was maintained at about 10 ° C. (FIG. 16A) and could be maintained at about 10 ° C. even after 8 hours (FIG. 16B).

Regarding the amount of heat storage material used in the heat storage section 14, when a model of a commercial product (model number: SJ-V200T) with a capacity of the refrigerator compartment 100 of 170 L is estimated as a model, in the case of the model shown in FIGS. The amount used is 7 kg. On the other hand, in the case of the model shown in FIGS. 16A and 16B, the amount used is 3.3 kg. Therefore, it was found that the model shown in FIG. 16 can keep the inside of the refrigerator compartment 100 warm for a long time and can reduce the amount of heat storage material used.
That is, it turned out that it can be set as the refrigerator in which an effective heat retention is possible by setting appropriately arrangement | positioning, material, and thickness of a thermal storage part.

According to the refrigerator 1 configured as described above, even if the operation is stopped, it is possible to maintain a temperature distribution in the refrigerator compartment 100 so that no temperature distribution occurs for a certain period of time.
In this example, in order to simplify the calculation, a simulation was performed using a two-dimensional model with a simplified structure, but a two-dimensional model that reproduced the actual refrigerator configuration was used without simplifying the calculation. The simulation may be performed.

Further, in this example, the door member 20 is provided on the container body 10 so as to be rotatable. However, if the door member (lid member) is provided so as to be able to open and close the refrigerator compartment 100, the above-described operation is performed. It is not limited to the configuration.

For example, the structure which opens and closes the refrigerator compartment 100 by sliding a lid material on a predetermined rail may be sufficient, or the structure which a cover material is provided so that attachment or detachment is possible, and opens and closes the refrigerator compartment 100 may be sufficient. . Even in such a configuration, the space in the vicinity of the lid member is still a portion that is relatively close to the outside air temperature after the operation is stopped. Therefore, by thickening the heat storage part provided in the wall material near the lid, it is possible to provide a refrigerator that can keep cold for a long time even after the operation is stopped.

17 and 18 are explanatory views of a second example of the refrigerator according to the present invention.
The refrigerator 4 of this example is partly in common with the refrigerator 1 of the first example. Therefore, in this example, the same code | symbol is attached | subjected about the component which is common in a 1st example, and detailed description is abbreviate | omitted.
As shown in FIG. 17, the refrigerator 4 has a reflective layer (infrared reflective layer) 30 that reflects infrared rays on the inner wall of the refrigerator compartment 100.

When the user wants to take out the stored items in the refrigerator compartment 100 while the refrigerator 4 is stopped, it is necessary to open the door member 20 and put the hand into the refrigerator compartment 100. At this time, since the surface temperature of the user's hand is usually higher than the internal temperature of the refrigerator compartment 100, heat flows into the refrigerator compartment 100 by radiant heat from the user's hand.

Such heat transfer by radiation between the user and the inside of the refrigerator compartment 100 when the door member 20 is released can be estimated using the following formula (8).

(Q: heat inflow due to radiation (J), A: surface area (m ² ), ε: emissivity, σ: Stefan-Boltzmann constant (5.67 × 10 ⁻⁸ (W / (m ² · K ⁴ ) ), S: door opening time (s), T ₄ : body surface temperature (K), T ₅ : refrigeration room temperature (K))

If the surface temperature of a user wearing clothes is 30 ° C., the temperature in the refrigerated room is 6 ° C., and the radiation from half of the surface area (1.8 m ² ) of the human body is considered, the heat transfer amount is 109 J / The amount of heat flowing into the storage room is 33 kJ if the door opening time is 30 seconds, and 66 kJ if it is 60 seconds.

On the other hand, the amount of heat that flows when the air in the refrigerator compartment is completely replaced with the outside air is such that the air density ρ (= 1.1763 kg / m ³ ) and the specific heat Cp (= 1007 J / (kg · K)), the outside air temperature is 25 ° C., and the refrigeration room temperature is 6 ° C., it becomes 32 kJ, which is (heat quantity = 140/1000 × ρ × Cp × (25−6)).
Therefore, it can be seen that the heat inflow when the door member 20 is opened is greatly affected by radiation from the user's body surface.

The cold storage container 4 of this example has a reflective layer 30 that reflects infrared rays on the inner wall of the refrigerator compartment 100. Therefore, the inflow of radiant heat can be prevented by reflecting the infrared rays radiated from the user's body surface when taking out stored items from the refrigerator compartment 100 during a power failure, and the temperature rise in the refrigerator compartment can be suppressed. In addition, during normal operation, the temperature in the refrigeration room is unlikely to rise, so power consumption can be reduced.

As the reflective layer 30, a material having a low absorption rate of infrared rays radiated from the human body is used. Such an infrared wavelength has a peak wavelength of about 9.6 μm from the Wien displacement law. Further, from the Kirchhoff's law, since the absorptance and the reflectance are inversely correlated, a material having such a high infrared reflectance may be used. For example, a material that reflects 60% or more of infrared light having a peak wavelength corresponding to the body surface temperature of the human body may be used. Examples of such a material include a metal material having light reflectivity such as aluminum.

The reflective layer 30 may be provided on the surface of the housing 18 as shown in FIG. 18A, and the reflective layer 30 constitutes a part of the housing 18 as shown in FIG. The reflective layer 30 and the heat storage unit 14 may be in contact with each other. 18B, when the reflective layer 30 is formed of a metal material, the cool air in the refrigerator compartment 100 during normal operation is stored in the heat storage unit via the reflective layer 30 that is a metal material. 14 is preferable because it is easy to be transmitted to 14 and the heat storage section 14 is stored cold and easily transitions to a solid phase.

According to the refrigerator 4 having the above-described configuration, even if the stored item is taken out from the refrigerator compartment when the operation is stopped, the temperature rise in the refrigerator compartment can be suppressed, and the temperature distribution in the refrigerator compartment is not generated. Can be maintained.

FIG. 19 is an explanatory diagram of a third example of the refrigerator according to the present invention.
The refrigerator 5 of this example is partly in common with the refrigerator 1 of the first example. Therefore, in this example, the same code | symbol is attached | subjected about the component which is common in a 1st example, and detailed description is abbreviate | omitted.

As shown in FIG. 19, the heat storage unit 14 of the refrigerator 5 is provided so as to surround the refrigerator compartment 100 between the inner heat storage unit 14 </ b> B provided to surround the refrigerator compartment 100, and the heat insulating unit 12 and the inner heat storage unit 14 </ b> B. The outer heat storage unit 14A. The heat storage unit 24 includes an inner heat storage unit 24B provided to surround the refrigerator compartment 100, and an outer heat storage unit 24A provided to surround the refrigerator compartment 100 between the heat insulating unit 22 and the inner heat storage unit 24B. Have. As a material for forming the outer

heat storage parts

14A and 24A, a material having a phase transition temperature close to the outside air temperature is used as compared with a material for forming the inner

heat storage parts

14B and 24B.

In the refrigerator 5 having such a configuration, after the operation is stopped, first, from the inner

heat storage units

14B and 24B having a relatively low phase transition temperature to the refrigerator compartment 100 until the phase transition of the inner

heat storage units

14B and 24B is completed. Cold air is supplied inside. Next, cold air is supplied from the outer

heat storage units

14A and 24A having a relatively high phase transition temperature into the refrigerator compartment 100 until the phase transition of the outer

heat storage units

14A and 24A is completed. Therefore, the phase transition temperatures of the

heat storage units

14 and 24 are set in multiple stages, and the temperature in the refrigerator compartment 100 can be easily maintained.

According to the refrigerator 5 having the above configuration, it is possible to maintain the temperature in the refrigerator compartment 100 so that no temperature distribution occurs.
In addition, in the refrigerator which concerns on this invention demonstrated above, it is preferable to provide especially the structure shown below.
(1) A storage refrigerator having an electrical cooling function,
A container body, and a lid member that allows the space in the container body to be opened and closed,
The space surrounded by the container body and the lid material constitutes a refrigeration room for storing the stored items,
The container body and the lid member have a heat insulating part provided to surround the storage room, and a heat storage part provided at least in part between the refrigerator compartment and the heat insulating part,
The heat storage unit is made of one or more materials that cause a phase transition between a liquid phase and a solid phase at a temperature between a temperature controllable in the storage chamber and a living temperature around the refrigerator in steady operation. Formed using
In the temperature distribution formed in the refrigerating chamber due to a change over time after the electrical cooling function is stopped from a steady operation state, the heat storage is disposed in the vicinity of the first region that is relatively close to the living temperature. The temperature of the material is more than the amount of the material used per unit area of the wall surface of the storage chamber than the heat storage unit disposed in the vicinity of the second region that is difficult to approach the living temperature. The divided value is set to be small.
(2) The difference between the allowable temperature that is the temperature in the refrigerator compartment after the electrical cooling function is stopped and that can be stored, and the living temperature, and the controllable temperature and the temperature Based on the relationship between the dimensionless temperature, which is a value divided by the difference from the living temperature, and the Fourier number of the wall material constituting the container body and the lid material, the temperature in the refrigerator compartment is controlled after the operation is stopped. The thickness of the heat storage unit corresponding to the heat retention possible time until the temperature changes from the possible temperature to the allowable temperature is defined.
(3) The allowable temperature is 10 ° C. or less.
(4) The heat retention time is 2 to 24 hours.
(5) The heat storage unit is formed using a plurality of types of materials, and the material of the heat storage unit provided in the vicinity of the first region is the heat storage unit provided in the vicinity of the second region. The material has a lower temperature conductivity at the phase transition temperature than the material.
(6) The heat storage unit provided in the vicinity of the first region is provided so that the total latent heat amount is larger than that of the heat storage unit provided in the vicinity of the second region.
(7) The first region is a contact portion between the container body and the lid member when the lid member is closed.
(8) The first region is a ceiling portion of the refrigerator compartment.

(9) A storage refrigerator having an electrical cooling function,
A container body, and a lid member that allows the space in the container body to be opened and closed,
The space surrounded by the container body and the lid material constitutes a refrigeration room for storing the stored items,
The container main body and the lid member have a heat insulating part provided to surround the refrigerator compartment, and a heat storage part provided at least in part between the refrigerator compartment and the heat insulating part,
The heat storage unit is made of one or more materials that cause a phase transition between a liquid phase and a solid phase at a temperature between a temperature that can be controlled in the refrigerator compartment and a living temperature around the refrigerator in steady operation. Formed using
The thickness of the heat storage part of the region occupying the largest area in the refrigerator is the allowable temperature that is allowed as the temperature at which the stored item can be refrigerated, which is the temperature in the refrigerator compartment after the electrical cooling function is stopped, The relationship between the dimensionless temperature, which is a value obtained by dividing the difference between the living temperature by the difference between the controllable temperature and the living temperature, and the Fourier number of the wall material constituting the container body and the lid member Is defined as a thickness corresponding to a heat retention possible time until the temperature in the refrigerator compartment changes from the controllable temperature to the allowable temperature after the electrical cooling function is stopped.
(10) The allowable temperature is 10 ° C. or less.
(11) The warming time is 2 to 24 hours.
(12) The material has a peak phase transition temperature of 0 ° C. to 10 ° C. during solidification.
(13) The material has a phase transition temperature range of 2 ° C. or less when a phase transition from a liquid phase to a solid phase occurs at a temperature between the set temperature in the storage chamber and the living temperature in steady operation. .
(14) The heat storage unit includes a first heat storage unit provided to surround the storage chamber, and a second heat storage unit provided to surround the refrigerator compartment between the heat insulating unit and the first heat storage unit. The material for forming the second heat storage part has a phase transition temperature close to the living temperature as compared with the material for forming the first heat storage part.
(15) The phase transition temperature of the material is lower than the living temperature, and at least a part of the inner wall of the storage chamber is 60% of infrared light having a peak wavelength corresponding to the body surface temperature of the human body. It is covered with an infrared reflecting layer that reflects the above.
(16) The material for forming the infrared reflective layer is a metal material, and at least a part of the inner wall of the storage chamber is formed of the metal material and functions as the infrared reflective layer, and is in contact with the heat storage unit. .

Next, the cold insulating container of the present invention will be described.
FIG. 20 is a schematic configuration diagram showing the first embodiment of the cold insulating container of the present invention, and reference numeral 50 in FIG. 20 denotes a refrigerator-freezer as the cold insulating container. The refrigerator-freezer 50 includes a first container 60, a second container 70, and a third container 80, and these are integrally formed by using a common housing 51.

The 1st container 60 functions as a refrigerator, and has fundamentally the structure of the refrigerator 1 demonstrated previously using FIGS. 1-19. Moreover, in this embodiment, the 2nd container 70 functions as a freezer, and the 3rd container 80 functions as a vegetable store.
FIG. 21 is a side sectional view showing the refrigerator 50 in a simplified manner. As shown in this figure, the first container 60 has a first container body 61 and a first lid member 62, and a space surrounded by the first container body 61 and the first lid member 62 is a refrigerator compartment 63. It is what. As described above, the first container 60 corresponds to the refrigerators 1 to 5 described above, and therefore the first container body 61 corresponds to the container body 10 shown in FIG. Corresponds to the door member 20, and the refrigerator compartment 63 corresponds to the refrigerator compartment 100.

As shown in FIG. 21, the second container 70 includes a second container main body 71 and a second lid member 72, and a space surrounded by the second container main body 71 and the second lid member 72 is frozen. This is the chamber 73. Further, the third container 80 includes a third container body 81 and a third lid member 82, and a space surrounded by the third container body 81 and the third lid member 82 is a vegetable compartment 83. is there.

In addition, about the 1st container 60, as demonstrated in the previous refrigerator 1, the 1st cover material 62 is provided in the opening part so that opening and closing is possible by the door system, and, thereby, the refrigerator compartment 63 can be opened and closed. Similarly, the second container 70 and the third container 80 also adopt a door system in this embodiment. However, for the second container 70 and the third container 80, a drawer method can be adopted instead of such a door method.

That is, the 2nd container 70 and the 3rd container 80 are comprised in the drawer shape which the upper side opened, and the internal freezer compartment is pulled out by pulling out the 2nd cover material 72 or the 3rd cover material 82 located in the front. 73 or the vegetable compartment 83 may be opened, and the freezer compartment 73 or the vegetable compartment 83 may be closed by pushing in from the state. By such a door-type or drawer-type mechanism, the opening and closing of the present invention that enables the second container 70 and the third container 80 to open and close the spaces (freezer compartment 73 or vegetable compartment 83) in the

container bodies

71 and 81. The mechanism is configured.

These

containers

60, 70, 80 are arranged in the order of the third container 80, the second container 70, and the first container 60 from the bottom, and share a part of each container

main body

61, 71, 81 and the housing with each other. Are formed integrally.
As for the first container 60, for example, as shown in FIG. 1B, the

wall materials

11 and 21 are composed of the heat insulating part 12 and the heat storage part 14, and similarly, the second container 70 and the third container. The wall material of 80 also consists of a heat insulating part and a heat storage part.

That is, as shown in FIG. 21, the first container body 61 in the first container 60 is provided with a first heat insulating portion 65 surrounding the refrigerator compartment 63 as a wall material 64 in a housing (not shown), Furthermore, the 1st heat storage part 66 is arrange | positioned in the inner side, ie, between the refrigerator compartment 63 and the 1st heat insulation part 65. FIG. The first lid member 62 is also provided with a first heat insulating portion 65 and a first heat storage portion 66 as a wall member 64 in a housing (not shown). In FIG. 21, the thickness of the first heat storage unit 66 is simplified to be uniform, but for example, as shown in FIG. 1B, the first heat storage unit 66 in the vicinity of the packing P is replaced with the other part. The temperature conductivity of the first material (first heat storage material) forming the first heat storage unit 66 is divided by the amount used per unit area of the wall surface, such as being formed thicker than the first heat storage unit 66. It shall be arrange | positioned so that a value may become small. However, in the present invention, the first heat storage unit 66 may be arranged uniformly in the entire first container 60 without necessarily making a difference in the arrangement state of the first heat storage unit 66.

Also for the second container 70, similarly to the first container 60, a second heat insulating part 75 and a second heat storage part 76 are disposed as wall members 74 on the second container main body 71 and the second lid member 72. . Further, for the third container 80, similarly to the first container 60, a third heat insulating part 85 and a third heat storage part 86 are arranged as wall members 84 on the third container main body 81 and the third lid member 82. ing. However, since the bottom part of the first container 60 and the ceiling part of the second container 70 are formed by the same first shelf part 52, the same heat insulation part is the first in particular in the first shelf part 52. The heat insulating part 65 and the second heat insulating part 75 are combined. Similarly, the bottom part of the second container 70 and the ceiling part of the third container 80 are formed by the same second shelf part 53, and in this second shelf part 53, the same insulation part is the second insulation part. 75 and the third heat insulating portion 85.

For the second heat storage unit 76 in the second container 70 and the third heat storage unit 86 in the third container 80, as in the first heat storage unit 66 in the first container 60, for example, as shown in FIG. The thermal conductivity of the material (second material, third material) forming these heat storage parts, such as forming the heat storage part in the vicinity of the packing P thicker than the heat storage part of the other part, etc. It is preferable to arrange so that the value divided by the amount used per area is small.

Further, this refrigerator-freezer 50 is provided with a gas compression type cooling device similar to the cooling device 19 shown in FIG. That is, as shown in FIG. 21, the refrigerator 50 is provided with a cooling device (cooling means) 90 on the back side thereof. The cooling device 90 includes a compressor 91 provided on the bottom back side of the third container 80, a radiator 92 provided on the back side of the refrigerator 50, and the second container 70, that is, the freezer compartment. 73, a cooler 93 provided exposed in 73, a pipe 94 connecting between them, a cooling mechanism 95 for cooling the inside of the first container 60 (in the refrigerator compartment 63) by the cooler 93, It is configured. Although not shown, the cooling mechanism 95 includes normally known components such as an expansion valve and a dryer for removing moisture in the refrigerant.

The compressor 91 compresses the refrigerant. The radiator 92 radiates heat by condensing the refrigerant compressed by the compressor 91. The cooler 93 condenses in the radiator 92 and then evaporates the refrigerant expanded through an expansion valve (not shown) and absorbs heat to cool the surroundings. For example, the inside of the freezer compartment 73 is cooled to about −18 ° C. by the cooler 93.

In addition, the cooling mechanism 95 controls a damper 96 disposed on the first shelf 52 between the first container 60 and the second container 70, a fan 97, and the operations of the damper 96 and the fan 97. And a control unit 98. The first shelf plate 52 is formed with a through hole 52 a on the back side of the refrigerator 50 so as to penetrate the freezer compartment 73 and the refrigerator compartment 63 through the top and bottom. And the damper 96 is provided in the refrigerator compartment 63 side of this through-hole 52a so that opening and closing is possible.

The fan 97 is provided in the through hole 52a (or in the freezing chamber 73 side of the through hole 52a), and allows air (cold air) to flow from the freezing chamber 73 side to the refrigerating chamber 63 side. In addition, about this fan 97, the flow of air (cold air) may be switched from the refrigerator compartment 63 side to the freezer compartment 73 side, for example by switching the rotation direction. Further, two fans 97 may be provided, one of which may be configured to flow from the freezer compartment 73 side to the refrigerator compartment 63 side, and the other may be configured to flow from the refrigerator compartment 63 side to the refrigerator compartment 73 side.

The control unit 98 controls the opening / closing operation of the damper 96 and the rotation operation of the fan 97, and performs preset and stored control. That is, during steady operation, when the inside of the refrigerator compartment 63 rises to a predetermined temperature or at a preset time, the damper 96 is opened and the fan 97 is rotated to cool the inside of the freezer 73 (for example, −18 ° C. cold air) is introduced from the through hole 52a to the refrigerator compartment 64 side. Thereby, the inside of the refrigerator compartment 63 is cooled to a set temperature, for example, about 3 ° C. Note that the damper 96 is closed and the rotation of the fan 97 is also stopped when the inside of the refrigerator compartment 63 is lowered to a predetermined temperature or when a preset time has elapsed.

In addition, the control unit 98 performs the operation of the damper 96 from the freezer compartment 73 side and the refrigerator compartment 63 from the side of the open state of the damper 96 and the rotation operation of the fan 97 at the time of unsteady operation, for example, initial operation at the time of new purchase or recovery after a power failure. The time for inflow of cold air to the side is made longer than that in the steady operation, and the inside of the refrigerator compartment 63 is cooled more strongly than in the steady operation. The operation during this unsteady operation will be described in detail later.

With the above configuration, the refrigerator compartment 63 of the first container 60 can refrigerate and store stored items at a temperature lower than the outside air temperature (the living temperature around the refrigerator / freezer 50) during normal operation. In the normal operation, the stored item can be stored frozen at a temperature lower than that of the refrigerator compartment 63. Although not shown, the vegetable compartment 83 of the third container 80 is cooled to a set temperature, for example, about 5 ° C. to 8 ° C. by introducing cold air from the freezer compartment 73 in the same manner as the refrigerator compartment 63. Yes.

Further, a dehumidifier 54 is disposed in the refrigerating chamber 63 of the first container 60 on the back side of the refrigerating freezer 50. The dehumidifier 54 is disposed at a substantially central portion in the vertical direction of the refrigerating room 63, and operates particularly during the unsteady operation, that is, during the initial operation at the time of new purchase or recovery after a power failure. The inside is dehumidified.

The dehumidifier 54 has a fan 55 and a dehumidifier body 56. The fan 55 creates an air flow in the refrigerating chamber 63 as indicated by a broken line arrow in FIG. 21, and its rotation operation is controlled by the control unit 98. The dehumidifier body 56 is not particularly limited, and one having a known dehumidifying function is used. For example, there is an adsorption method that reduces humidity using a hygroscopic material such as zeolite or silica gel, or a Peltier method that cools using a Peltier element and condenses moisture (humidity) in the air to reduce humidity. Adopted.

In this embodiment, it is assumed that the Peltier method is adopted, and therefore, the dehumidifier body 56 is made of a Peltier element. The operation of the Peltier element (dehumidifier body 56), that is, on / off, is controlled by the control unit 98. A container 57 for receiving and storing condensed water is provided below the Peltier element (dehumidifier body 56). A discharge pipe 58 is connected to the bottom of the container 57, and water accumulated in the container 57 is discharged from the discharge pipe 58. The dehumidifying body 56 discharges condensed water only from the back side of the refrigerator compartment 63, and the container 57 is disposed on the back side of the refrigerator compartment 63 so as to receive the discharged water. Yes. With such a configuration, the container 57 does not block the air flow by the fan 55.

The discharge pipe 58 enters between the first heat insulating portion 65 and the first heat storage portion 66 on the back side of the first container 60 from the inside of the refrigerator compartment 63, and the second heat insulating portion 75 and the second heat storage portion of the second container 70. 76, the space between the third heat insulating portion 85 and the third heat storage portion 86 of the third container 80 is lowered to reach the vegetable compartment 83. A humidifier 59 using an ultrasonic vibrator or the like is provided at the end of the discharge pipe 58 on the vegetable compartment 83 side. The humidifier 59 is for humidifying the inside of the vegetable compartment 83 by spraying the water sent from the discharge pipe 58 in the mist form into the vegetable compartment 83. The operation of the humidifier 59 is also controlled by the control unit 98.

Further, the refrigerator-freezer 50 is provided with a control device (not shown) including the control unit 98. The control device adjusts the temperature in the refrigerator compartment 63 (not shown). Is provided. This temperature adjustment mechanism is a known mechanism used when, for example, the temperature in the refrigerator compartment 63 is changed between summer and winter, and includes a temperature sensor (not shown) provided in the refrigerator compartment 63 and the control unit. 98. That is, when the inside of the refrigerating chamber 63 becomes a predetermined temperature higher than the temperature set by the temperature adjusting mechanism, the control unit 98 operates the damper 96 and the fan 97 and causes cold air to flow into the refrigerating chamber 63 side from the freezing chamber 73 to refrigerate. The inside of the chamber 63 is cooled to a set temperature.

Here, as for the 1st material (1st heat storage material) which forms the 1st heat storage part 66 of the 1st container 60, the peak temperature of the phase transition temperature at the time of solidification which turns into a solid from a liquid can be adjusted with the said temperature control mechanism. It is preferable to be included in the temperature range in the refrigerator compartment 63. For example, the set temperature of the refrigerator compartment 63 is usually about 3 ° C. to 5 ° C., but the temperature range that can be adjusted by the temperature adjusting mechanism is wider than this, for example, about 2 ° C. to 8 ° C. Therefore, the peak temperature of the phase transition temperature at the time of solidification of the first material (first heat storage material) is preferably within such a temperature range, for example, about 6 ° C. to 7 ° C. is preferable.

As described above, the peak temperature of the phase transition temperature at the time of solidification is, for example, when a phase transition from a liquid phase to a solid phase occurs when a temperature drop rate is measured at 1 ° C./min using a differential scanning calorimeter. The peak temperature can be measured. In this way, the first material (first heat storage material) is surely solidified at least at the temperature in the refrigerator compartment 63 adjusted by the temperature adjustment mechanism. Therefore, even if the cooling device 90 stops its operation at the time of a power failure or the like, the inside of the refrigerator compartment 63 is compared by absorbing a large amount of heat corresponding to the latent heat when the first material undergoes phase transition from solid to liquid. For a long time.

In addition, the second material (second heat storage material) forming the second heat storage unit 76 of the second container 70 has a peak temperature of the phase transition temperature at the time of solidification from a liquid to a solid, and a range of the set temperature of the freezer 73 It is preferable to be contained within. Similarly, the 3rd material (3rd heat storage material) which forms the 3rd heat storage part 86 of the 3rd container 80 has the peak temperature of the phase transition temperature at the time of solidification which turns into a solid from a liquid of the preset temperature of the vegetable compartment 83 It is preferable to be included in the range.
In addition, about 1st material (1st heat storage material), 2nd material (2nd heat storage material), and 3rd material (3rd heat storage material), all may consist of 1 type of materials, It may consist of materials.

Next, operation | movement of the refrigerator-freezer 50 which consists of such a structure is demonstrated.
During the steady operation, by operating the cooling device 90, the refrigerator compartment 63, the freezer compartment 73, and the vegetable compartment 83 are each cooled to a set temperature in the same manner as the conventional refrigerator-freezer as described above. That is, by operating the cooling device 90, the cooler 93 cools the inside of the freezer compartment 73 to a predetermined temperature, for example, about −18 ° C., and further, the damper 96 and the fan 97 are operated by the control unit 98, thereby the freezer compartment 73. The inside cold air is caused to flow into the refrigerator compartment 63 to cool the inside of the refrigerator compartment 63 to a set temperature. Similarly, the vegetable compartment 83 is also cooled to the set temperature.

Further, at the time of unsteady operation prior to steady operation, for example, at the time of new purchase or initial operation at the time of recovery after a power failure, first, the cooling device 90 is operated in the same manner as during steady operation, and the controller 98 controls the dehumidifier 54. The fan 55 and the Peltier element (dehumidifier body 56) are operated to dehumidify the refrigerator compartment 73. Thus, the reason for performing dehumidification at the beginning of unsteady operation is as follows.

During the initial operation at the time of new purchase or recovery after a power failure, the heat storage materials (first material, second material, third material) forming the

heat storage portions

66, 76, 86 of the

containers

60, 70, 80 are substantially the same. Since it is the same temperature as the outside air temperature (ambient living temperature), it is in a liquid phase state. Therefore, in particular, in order to shift the state in the refrigerating chamber 63 to the steady operation or to restore the state, the first material (first heat storage material) forming the first heat storage section 66 of the first container 60 is brought into a solid state. Therefore, it is necessary to store cold in the first material. However, since the latent heat storage material is used as the first material, cooling the inside of the refrigerating chamber 63 in the same manner as in the steady operation requires a long time to store the cold, and as a result, the inside of the refrigerating chamber 63 Therefore, it takes a long time to shift to (or return to) the original steady operation in which the stored items are stored in a refrigerator.

Therefore, it is conceivable to shorten the time for storing the cold energy in the first material by controlling the cooling mechanism 95 by the control unit 98 and strengthening the cooling of the refrigerator compartment 63. However, when the cooling is strengthened in this way, for example, when the inside of the refrigerator compartment 63 is cooled to about −18 ° C. like the freezer compartment 73, the moisture (humidity) in the indoor air is condensed in the refrigerator compartment 63, and further, frost and And adheres to the inner wall surface. Then, even if sufficient cold heat is stored in the first material, and the first material is transferred to the solid phase, the temperature in the refrigerator compartment 63 becomes too lower than the set temperature due to the influence of frost. That is, normal operation cannot be performed at the set temperature.

Therefore, in this embodiment, as described above, first, the inside of the refrigerator compartment 73 is dehumidified. By dehumidifying in this way, the moisture in the refrigerator compartment 73 can be sufficiently reduced to lower the dew point temperature, and it is possible to prevent condensation and frost formation during subsequent cooling.
About the dehumidification time by the dehumidifier 54, it calculates | requires beforehand by simulation etc. based on the capacity | capacitance in the refrigerator compartment 63, and the capability of the Peltier device (dehumidifier main body 56), and memorize | stores it in the control part 98. .

When the set dehumidifying time has elapsed, the control unit 98 stops the operation of the dehumidifier 54. The water cooled and condensed by the Peltier element (dehumidifier body 56) is accumulated in the container 57, further flows through the discharge pipe 58 to the vegetable compartment 83, and is sprayed in a mist form by the humidifier 59. It has become. The spray of water by the humidifier 59 is also linked to the operation of the dehumidifier 54 by the control unit 98.

In the above description, cooling by the cooling device 90 is performed simultaneously with dehumidification by the dehumidifier 54, but only dehumidification by the dehumidifier 54 may be performed in advance without cooling by the cooling device 90. In that case, after the operation of the dehumidifier 54 is stopped as described below, the cooling device 90 is started.

When the operation of the dehumidifier 54 is stopped, if the cooling device 90 is not activated, it is activated, and the control unit 98 opens the damper 96 in the cooling mechanism 95 to rotate the fan 97. At that time, the control unit 98 controls the time for the damper 96 to be open and the time for the cool air to flow from the freezer compartment 73 side to the refrigerating compartment 63 side by the rotation operation of the fan 97 so as to be longer than that during steady operation. To do.

Then, since the inside of the freezer compartment 73 is cooled by the cooling device 90 in the same manner as during steady operation, a sufficient amount of cold air flows from the inside of the freezer compartment 73 toward the refrigerator compartment 63 side. As a result, the inside of the refrigerator compartment 63 is cooled to the same temperature as that of the freezer compartment 73 that is cooled in the same manner as during steady operation, that is, to substantially the same temperature.

Here, regarding the cooling time in the refrigerating chamber 93 by the cooling mechanism 95, that is, the cooling time to substantially the same temperature as the freezing chamber 73, the first material (first heat storage material) of the first heat storage section 66 in the first container 60 is used. ), The cooling capacity of the cooling device 90 and the cooling mechanism 95, and the like, obtained in advance by simulation or the like, set, and stored in the control unit 98.
Thus, when the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the freezer compartment 73 that is cooled in the same manner as in the steady operation, the first material (first heat storage) of the first heat storage section 66 in the first container 60 is obtained. The material) is cooled much faster than during the steady operation of the refrigerator compartment 63. Therefore, the first material rapidly accumulates cold heat and undergoes a phase transition from the liquid phase to the solid phase.

Thereafter, the control unit 98 stops the unsteady operation for the refrigerator compartment 63 by the cooling mechanism 95, and shifts (returns) to the steady operation. That is, the damper 96 and the fan 97 are operated in the steady operation mode by the control unit 98, and the cold air in the freezer compartment 73 is intermittently flowed into the refrigerating chamber 63, whereby the inside of the refrigerating chamber 63 is cooled and held at the set temperature. .

According to such a refrigerator-freezer 50 and its operation method, the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the freezer compartment 73 cooled in the steady operation during the unsteady operation prior to the steady operation. Therefore, by using a lot of cold air below freezing point in the freezing chamber 73, it is possible to store the cold heat in the first material (first heat storage material) in a relatively short time and to store such cold heat. It is possible to suppress the cost from becoming high with a simple configuration. Moreover, since the inside of the refrigerator compartment 63 is dehumidified by the dehumidifier 54 before the cooling by such a cooling mechanism 95, it is possible to suppress the occurrence of frost and condensation in the refrigerator compartment.

In the above-described embodiment, the dehumidifier body 56 is configured by a Peltier element. However, as described above, it is possible to employ an adsorption method in which the humidity is reduced using a hygroscopic material. In that case, a porous material such as zeolite, silica gel, or activated alumina is preferably used as the hygroscopic material, and among these, zeolite is preferably used. As shown in the graph showing the water adsorption isotherm in FIG. 22, the zeolite has a large amount of adsorption dehumidification (moisture adsorption amount) even in the low temperature (low vapor pressure) region, so that the inside of the refrigerator 63 This is because the moisture absorption function can be satisfactorily exhibited even when used in the above.

FIG. 23 is a diagram showing a second embodiment of the cold container according to the present invention, and reference numeral 150 in FIG. 23 denotes a refrigerator-freezer as the cold container. The difference between the refrigerator-freezer 150 and the refrigerator-freezer 50 shown in FIG. 21 is that the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the refrigerator compartment 73 (in the second container 70) cooled in a steady operation. When cooled, a moisture absorbing material that generates heat when absorbing moisture is disposed in a region where the amount of cold heat discharged is relatively large in the first container 60.

In the refrigerator 1 shown in FIGS. 1A and 1B, for example, as described with reference to FIG. 7, the inflow of heat into the refrigerator compartment 100 of the refrigerator 1 after operation is stopped in the packing P as compared with other portions. Since the heat insulating property is low, it mainly occurs at the position of the packing P, and heat is transferred from the packing P portion to the inside of the refrigerator compartment 100.
That is, the inflow of heat into the refrigerating room 100, in other words, the discharge of the cold heat from the refrigerating room 100 becomes larger at the packing P portion. Further, such a trend of heat inflow (cold heat discharge) is the same not only after the operation is stopped, but also during the initial operation at the time of new purchase or recovery after a power failure, for example.

Therefore, also in the refrigerator-freezer according to the present invention, in the first container 60, the amount of cold heat discharged from the refrigerator compartment 63 to the outside increases particularly in the packing P portion. That is, when the inside of the refrigerating chamber 63 is cooled by the cooling mechanism 95 in the same manner as the freezing chamber 73 (in the second container 70) cooled in a steady operation, the packing P portion in the first container 60 Compared with this part, the discharge amount of cold heat is relatively large.

In this way, since the discharge amount of the cold heat is relatively large in the packing P portion, the cold air (cold heat) in the refrigerator compartment 63 transmitted through the packing P cools the air outside (around) the packing P, and the packing P Condensation occurs outside. In particular, when cold air is stored in the first material (first heat storage material) of the first heat storage section 66 in the first container 60 using cold air below freezing point that has flowed in from the freezer compartment 73 as in the present embodiment, the outside air 24 becomes larger, the condensation tends to occur on the outside (outer vicinity) R of the packing P as shown in FIG. 24 (a) showing the portion A in FIG.

Therefore, in this embodiment, as shown in FIG. 23, the moisture absorbing material 155 is disposed outside (outer vicinity) R of the packing P. As the moisture absorbing material 155, a material that generates heat upon moisture absorption is used. Specifically, a porous material such as zeolite, silica gel, activated alumina, or the like is used. Among these, zeolite is preferably used. As shown in Fig. 22, zeolite has a large amount of moisture absorption (moisture adsorption) compared to other types even at low temperatures (low vapor pressure). Because it is done.

Further, such a hygroscopic material 155, for example, zeolite having an appropriate particle size is used, and is filled in a container (not shown) in a dried state so as to exhibit a sufficient hygroscopic function. Used. As the container, a bag-like one formed by a resin sheet having a large number of openings such as a mesh is used. Alternatively, it may be a container made of a resin or metal having an opening at least partially.

Such a container having the moisture-absorbing material 155 is basically used in an unsteady operation prior to a steady operation, for example, at the time of initial operation at the time of new purchase or recovery after a power failure. Therefore, when not in use, the opening is hermetically sealed by, for example, a sealing encapsulant so that the hygroscopic performance of the hygroscopic material 155 (zeolite) does not deteriorate. It is preferable to be configured as described above.

Such a container is provided with a sticking material such as a seal and a magnet, for example, and is detachably attached to the first container body 61 and the first lid member 62 which are the outside (outer vicinity) R of the packing P. It is supposed to be. Alternatively, as shown in FIG. 24 (b), an engagement recess 157 is formed in the first container body 61 and the first lid member 62 that become the outside (outer vicinity) R of the packing P, and this engagement recess 157. It may be adapted to be detachably attached to.

The container having the hygroscopic material 155 is preferably disposed around the entire circumference of the packing P between the first container body 61 and the first lid member 62. However, you may make it arrange | position in several places, for example at intervals. Further, even in the same packing P portion, there is a difference in the thickness of the packing P, and when the discharge amount of cold heat is relatively different depending on the position of the packing P, the cold heat is less than that of other portions. A container (moisture absorbing material 155) may be selectively disposed at a location where the discharge amount is relatively large.

Next, operation | movement of the refrigerator-freezer 150 using the container which has such a hygroscopic material 155 is demonstrated.
At the time of steady operation, similarly to the refrigerator 50 of the above-described embodiment, the refrigerator 90 is operated to cool the refrigerator compartment 63, the freezer compartment 73, and the vegetable compartment 83 to the set temperatures.

Further, at the time of non-steady operation prior to steady operation, for example, at the time of initial operation at the time of new purchase or recovery after a power failure, first, the sealing material of the container having the moisture absorbing material 155 is peeled off and the outside of the packing P (outside) The vicinity portion) R, for example, is fitted into the engagement recess 157 shown in FIG.

Subsequently, the cooling device 90 is operated in the same manner as during steady operation, and the fan 98 and the Peltier element (dehumidifier body 56) of the dehumidifier 54 are operated by the control unit 98 in the same manner as the refrigerator 50, and the refrigerator 73 Dehumidify inside. By dehumidifying in this way, the moisture in the refrigerator compartment 73 can be sufficiently reduced to lower the dew point temperature, and it is possible to prevent condensation and frost formation during subsequent cooling.

When the set dehumidifying time has elapsed, the control unit 98 stops the operation of the dehumidifier 54.
Here, the water cooled and condensed by the Peltier device (dehumidifier body 56) is accumulated in the container 57, further flows through the discharge pipe 58 to the vegetable compartment 83, and is sprayed in a mist form by the humidifier 59. It is like that.
In this embodiment, the cooling by the cooling device 90 is performed simultaneously with the dehumidification by the dehumidifier 54. However, the cooling by the dehumidifier 54 may be performed in advance without performing the cooling by the cooling device 90. Good. In that case, after the operation of the dehumidifier 54 is stopped as described below, the cooling device 90 is started.

Then, since the inside of the freezer compartment 73 is cooled by the cooling device 90 in the same manner as during steady operation, a sufficient amount of cold air flows from the inside of the freezer compartment 73 toward the refrigerator compartment 63 side. As a result, the inside of the refrigerator compartment 63 is cooled to the same temperature as that of the freezer compartment 73 that is cooled in the same manner as during steady operation, that is, to substantially the same temperature. And the 1st material (1st heat storage material) of the 1st heat storage part 66 in the 1st container 60 is cooled markedly compared with the time of the steady operation of the refrigerator compartment 63, and, thereby, 1st material stores cold heat rapidly. , Phase transition from liquid phase to solid phase.

Further, when a sufficient amount of cold air below freezing point flows into the refrigerating chamber 63 in this way and the inside of the refrigerating chamber 63 is cooled to substantially the same temperature as the freezing chamber 73, the heat exchange particularly in the packing part P increases. Inflow of heat, that is, discharge of cold heat increases. Then, the cold air (cold heat) in the refrigerator compartment 63 is transmitted through the packing P to cool the outside (outer vicinity) R.

However, since the container having the moisture absorbing material 155 is disposed on the outside (outer vicinity) R of the packing P, the moisture absorbing material 155 is outside the packing P (outer vicinity) R and the air in the vicinity thereof. It absorbs moisture (absorbs moisture) and generates heat. Therefore, since the hygroscopic material 155 generates heat as described above, the temperature rises outside (outer vicinity) R of the packing P as shown in FIG. 24C, thereby preventing condensation. .

Further, the container having the moisture absorbing material 155 is removed from the outside (outer vicinity) R of the packing P, dried as necessary, and then sealed again with a sealing material and stored. This allows reuse.

According to such a refrigerator-freezer 150 and its operating method, as in the refrigerator-freezer 50 and its operating method in the above embodiment, during unsteady operation prior to steady operation, to the first material (first heat storage material). Therefore, it is possible to store the cold heat in a relatively short time, and it is possible to suppress the cost from increasing by making the mechanism for storing such cold heat simple. Moreover, since the inside of the refrigerator compartment 63 is dehumidified by the dehumidifier 54 before the cooling by such a cooling mechanism 95, it is possible to suppress the occurrence of frost and condensation in the refrigerator compartment.

Furthermore, when the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the freezer compartment 73 (in the second container 70) that is cooled in a steady operation, the first container 60 has a relatively large discharge amount of cold heat. That is, the moisture absorbing material 155 that generates heat when absorbing moisture is disposed outside the packing P (outside vicinity) R, so that dew condensation occurs on the outside (outside vicinity) R of the packing P due to cold air in the refrigerator compartment 63. Can be prevented.

FIG. 25 is a view showing a third embodiment of the cold storage container of the present invention, and reference numeral 160 in FIG. 25 denotes a refrigerator-freezer as the cold storage container. The refrigerator / freezer 160 differs from the refrigerator / freezer 150 shown in FIG. 23 in that it is provided in the cooling device 90 in that imogolite is used instead of a porous material such as zeolite as the moisture-absorbing material 162 that generates heat when absorbing moisture. The flow path of the refrigerant into the condenser 164 piped so as to pass through the vicinity of the hygroscopic material 162 is configured to be switchable by the control unit 98.

Imogolite is a tubular aluminum silicate having a chemical composition of SiO ₂ · Al ₂ O ₃ · 2H ₂ O [(OH) ₃ Al ₂ O ₃ SiOH], for example, an outer diameter of about 2.5 nm and an inner diameter of The length is about 1.0 nm and the length is about several tens of nm to several μm.
This imogolite has a high water absorption rate (water absorption rate about 4 to 5 times that of zeolite), a high dehydration rate at low temperature (21 wt% dehydration at 40 ° C), and a low hydration enthalpy (hydration equivalent to zeolite) Enthalpy), and absorbs a large amount of water on the high humidity side (absorbs about 230% by weight when the relative humidity is 96%).

This imogolite is also used by being housed in a bag-like resin sheet, resin, metal, or the like, as in the second embodiment. And it attaches in the engagement recessed part 157 as shown to Fig.26 (a) with such a form. However, in the present embodiment, as will be described later, since the imogolite can be used for a long time without being exchanged, it is not accommodated in the bag-like resin sheet or container, and for example, a lid having a vent hole in the engagement recess 157 (Not shown) may be detachably provided, and the engaging recess 157 may be directly filled with imogolite.

25, 26 (a), (b), the first container body 61 is provided with a condenser 164 in the vicinity of the engaging recess 157 in which the hygroscopic material 162 is disposed. The condenser 164 is provided as a constituent member of the cooling device 90, and is a conventionally known pipe for circulating the refrigerant heated to about 40 ° C. by the compressor 91 to dissipate heat. In the present embodiment, a switching valve (not shown) for switching the flow path of the refrigerant flowing through the condenser 164 is provided. That is, as shown in FIGS. 26 (a) and 26 (b), the refrigerant is circulated in the condenser 164 disposed in the vicinity of the engaging recess 157, and the state is returned to the compressor 91 without being circulated. Can be switched between. Further, such switching control of the switching valve is performed by the control unit 98.

Note that the hygroscopic material 162 is also disposed around the entire circumference of the packing P between the first container body 61 and the first lid member 62 as in the second embodiment. It is preferable. In that case, it is preferable to arrange the condenser 164 in the vicinity of all the hygroscopic materials 162. However, the hygroscopic material 162 may be arranged at several places with an interval, for example. Further, even in the same packing P portion, there is a difference in the thickness of the packing P, and when the discharge amount of cold heat is relatively different depending on the position of the packing P, the cold heat is less than that of other portions. The hygroscopic material 162 may be selectively disposed at a location where the discharge amount is relatively large.

Next, the operation of the refrigerator-freezer 160 using such a hygroscopic material 162 will be described.
At the time of steady operation, similarly to the refrigerator 50 of the first embodiment, the refrigerator 90 is operated to cool the refrigerator compartment 63, the freezer compartment 73, and the vegetable compartment 83 to the set temperatures. Note that the hygroscopic material 162 is disposed in advance in the engaging recess 157. The operation relating to the hygroscopic material 162 will be described later.

Further, the moisture-absorbing material 162 is arranged in advance in the engagement recess 157 also during non-steady operation prior to steady operation, for example, during initial purchase during new purchase or during recovery after a power failure.
Then, the cooling device 90 is operated in the same manner as in the steady operation, and the control unit 98 operates the fan 55 and the Peltier element (dehumidifier body 56) of the dehumidifier 54 in the same manner as the refrigerator 50, and the inside of the refrigerator 73 Dehumidify. By dehumidifying in this way, the moisture in the refrigerator compartment 73 can be sufficiently reduced to lower the dew point temperature, and it is possible to prevent condensation and frost formation during subsequent cooling.

When the set dehumidifying time has elapsed, the control unit 98 stops the operation of the dehumidifier 54.
Here, the water cooled and condensed by the Peltier device (dehumidifier body 56) is accumulated in the container 57, further flows through the discharge pipe 58 to the vegetable compartment 83, and is sprayed in a mist form by the humidifier 59. It is like that.
Also in this embodiment, cooling by the cooling device 90 is performed at the same time as dehumidification by the dehumidifier 54, but even if only dehumidification by the dehumidifier 54 is performed in advance without cooling by the cooling device 90. Good. In that case, after the operation of the dehumidifier 54 is stopped as described below, the cooling device 90 is started.

However, since the hygroscopic material 162 is disposed outside (outer vicinity) R of the packing P, the hygroscopic material 162 absorbs the humidity in the outside (outer vicinity) R of the packing P and in the vicinity thereof ( It absorbs moisture) and generates heat. Therefore, since the hygroscopic material 162 generates heat as described above, the temperature rises outside (outer vicinity) R of the packing P as shown in FIG. 26B, thereby preventing condensation. .

In addition, the condenser 164 disposed in the vicinity of the moisture absorbent material 162 is controlled by the control unit 98 at the time of non-steady operation (initial operation at the time of new purchase or recovery after power failure) prior to such steady operation. The switching valve (not shown) is controlled so that the refrigerant does not flow through the condenser 164. Then, since the hygroscopic material 162 is not heated by the condenser 164, the hygroscopic material 162 adsorbs (hygroscopically) the humidity in the outside (outer vicinity) R of the packing P and the air in the vicinity thereof and absorbs heat to generate the packing. Condensation on the exterior (outer vicinity) R of P is reliably prevented.

In the steady operation after the non-steady operation, the control unit 98 controls the switching valve (not shown) so that the refrigerant flows through the condenser 164. Then, the moisture-absorbing material 162 is heated to, for example, about 40 ° C. by the condenser 164 to release (dehumidify) the moisture that has been previously absorbed, and become dry. Therefore, by performing the drying process of the hygroscopic material 162 by switching such a switching valve periodically or prior to the unsteady operation, the condensation on the outside (outer vicinity) R of the packing P is caused as described above. It can be surely prevented.

According to such a refrigerator-freezer 160 and the operation method thereof, as in the second embodiment, the storage of cold heat in the first material (first heat storage material) is compared during the unsteady operation prior to the steady operation. It can be performed in a short time, and a mechanism for storing such cold energy can be configured with a simple structure to prevent an increase in cost. Moreover, since the inside of the refrigerator compartment 63 is dehumidified by the dehumidifier 54 before the cooling by such a cooling mechanism 95, it is possible to suppress the occurrence of frost and condensation in the refrigerator compartment.

Furthermore, when the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the freezer compartment 73 (in the second container 70) that is cooled in a steady operation, the first container 60 has a relatively large discharge amount of cold heat. That is, since the moisture absorbing material 162 that generates heat when absorbing moisture is disposed outside the packing P (contains outside), dew condensation occurs outside the packing P (outside vicinity) R due to the cool air in the refrigerator compartment 63. Can be prevented.

In addition, since imogolite is used as the hygroscopic material 162 and the condenser 164 is disposed in the vicinity of the hygroscopic material 162, the water absorption of the hygroscopic material 162 absorbed by heat drying by the condenser 164 can be easily regenerated. Therefore, the hygroscopic material 162 can be used over a long period of time without being frequently replaced, for example, in a state of being disposed in the engagement recess 157.

FIG. 27 is an explanatory diagram of a storage container according to the fourth embodiment of the present invention. The storage container of this embodiment is partially in common with the storage container 1 of the first embodiment. Therefore, in this embodiment, the same code | symbol is attached | subjected about the component which is common in 1st Embodiment, and detailed description is abbreviate | omitted.

FIGS. 27A and 27B are explanatory views showing the structure of the wall material 11. As shown in FIGS. 27 (a) and 27 (b), the heat storage section 14 is located in the storage chamber 100 at a position adjacent to the packing P (indicated by reference symbol α in FIG. 1) through the casing of the container body 10 and the door member 20. It is provided so that it may become thick from the wall surface of the thickness direction. For this reason, the thickness of the heat insulation part 13 on the heat storage part 14 adjacent to the packing P is thinner than the thickness of the heat insulation part 12 on the heat storage part 14 not adjacent to the packing P.

In such a heat insulating portion 13 having a relatively thin heat insulating material, the amount of heat input is increased as compared with other regions, and the region where the heat accumulating portion 14 is thicker has a lower cooling capacity. obtain. Therefore, it is necessary to make sure that there is no difference in the heat insulation capability between the heat insulation part 12 and the heat insulation part 13. In this example, a vacuum heat insulating material having higher heat insulating performance than the urethane foam used in the heat insulating portion 12 is used for the heat insulating portion 13. Thereby, the heat insulation capability of the heat insulation part 13 can be made equivalent to the heat insulation part 12, and the fall of the cold storage capacity of the heat storage part 14 adjacent to the packing P can be prevented.

FIG. 28 is a diagram showing a fifth embodiment of the present invention and a method for obtaining the phase transition temperature of the heat storage material used in the storage container. FIG. 28A shows a measurement example of the phase transition temperature of the heat storage material using DSC. In the figure, the horizontal axis represents the temperature t. As for the temperature t, the right direction is a high temperature side. Two horizontal axes are shown. The upper side shows the measurement result when the temperature is lowered, and the lower side shows the measurement result when the temperature is raised. The vertical direction represents the amount of heat. The upper part represents the amount of heat released from the heat storage material with respect to the horizontal axis, and the lower part represents the heat absorption amount of the heat storage material.

FIG. 28 (a) shows a measurement result when the DSC furnace is cooled at a predetermined temperature decrease rate (temperature decrease rate) as a solid line waveform D1, and is cooled at a temperature decrease rate higher than the predetermined temperature decrease rate. The measurement result is shown by a broken line waveform D2. Similarly, the measurement result when the DSC furnace is heated at a predetermined temperature increase rate is indicated by a solid line waveform U1, and the measurement result when the DSC furnace is heated at a temperature increase rate higher than the predetermined temperature increase rate is indicated by a broken line waveform U2. Is shown.

As shown in FIG. 28A, in the measurement by DSC, the peak temperature changes due to the difference in the temperature lowering rate or the temperature rising rate. Further, in the temperature drop measurement, the phase transition temperature is lowered by the supercooling H, so that hysteresis occurs between the temperature rise and the temperature fall. In the first embodiment, it has been described that the peak temperature when the phase transition from the liquid phase to the solid phase occurs is measured at a temperature drop rate of 1 ° C./min. However, in the unsteady state, as shown in FIG. 28 (a), the peak temperature measured by DSC changes due to the difference in temperature drop or rise speed, or due to hysteresis during temperature drop and temperature rise. The peak temperature needs to be a temperature at which the heat storage material can maintain a solid phase when the heat storage material is kept cold or kept in an actual storage container. For this reason, the measurement of the phase transition temperature of the heat storage material using DSC is preferably to measure the peak temperature when the phase transition from the solid phase to the liquid phase occurs. Thus, the measurement of the peak temperature of the phase transition temperature of the heat storage material using DSC is preferably a temperature increase measurement at a relatively low temperature increase rate. In addition, for example, the cooling rate in the container actually used may be measured.

FIG. 28 (b) shows a method for determining the phase change temperature based on temperature rise measurement by DSC. The horizontal axis represents the temperature t, and the vertical direction represents the amount of heat, which is the same as in FIG. In FIG. 28 (b), the measurement result when the DSC furnace is heated at a predetermined rate of temperature rise is shown by a solid line waveform U. The straight line portion of the waveform U before the heat storage material starts the phase transition from the solid phase to the liquid phase is extended to the high temperature side to be a virtual straight line X1 indicated by a broken line. Further, the straight line portion of the waveform U before the heat absorption material starts the phase transition and before the maximum heat absorption amount is extended to be a virtual straight line X2 indicated by a broken line. The phase change temperature in DSC is obtained as the temperature of the intersection C between the virtual straight line X1 and the virtual straight line X2. On the other hand, when a straight line indicated by a broken line orthogonal to the virtual straight line X1 from the position of the maximum heat absorption amount is a virtual straight line X3, the peak temperature is obtained as the temperature of the intersection E between the virtual straight line X1 and the virtual straight line X3. The peak temperature obtained in this way is in a temperature range in which the heat storage material can maintain a solid state in an actual storage container in most cases.

FIG. 29 is a view showing a sixth embodiment of the cold container according to the present invention, and reference numeral 170 in FIG. 29 denotes a refrigerator-freezer as the cold container. 23 differs from the refrigerator refrigerator 150 shown in FIG. 23 or the refrigerator refrigerator 160 shown in FIG. 25 in that mesoporous silica is used instead of a porous material such as zeolite or imogolite as a moisture absorbing material 172 that generates heat when absorbing moisture. It is in the point used. It is the same as that of the refrigerator-freezer 160 in that the flow path of the refrigerant into the condenser 164 provided in the cooling device 90 and piped so as to pass through the vicinity of the hygroscopic material 172 can be switched by the control unit 98. is there.

Mesoporous silica is a porous material having uniform and regular pores (mesopores) composed of SiO ₂ (silica). The range of mesopores is 2-50 nm in diameter, which is larger than the pores of zeolite having a diameter of 2 nm or less.
This mesoporous silica has a water supply capacity equivalent to that of zeolite on the low humidity side, and absorbs a large amount of water on the high humidity side (room temperature 25 ° C., humidity 90%, about 2.7 times the amount of water absorption of zeolite). Since it dehydrates even at room temperature, it has excellent properties such as being usable as a humidity control material.

This mesoporous silica is also used by being housed in a bag-like resin sheet, resin, metal, or the like, as in the second embodiment. And it attaches in the engagement recessed part 157 as shown to Fig.30 (a) with such a form. However, in the present embodiment, as will be described later, since mesoporous silica can be used for a long time without replacement, for example, the engagement recess 157 has a vent hole without being accommodated in the bag-like resin sheet or container. A lid (not shown) may be provided so as to be detachable, and mesoporous silica may be directly filled into the engagement recess 157.

29, 30A, and 30B, the first container body 61 is provided with a condenser 164 in the vicinity of the engaging recess 157 in which the hygroscopic material 172 is disposed. The condenser 164 is provided as a constituent member of the cooling device 90, and is a conventionally known pipe for circulating the refrigerant heated to about 40 ° C. by the compressor 91 to dissipate heat. In the present embodiment, a switching valve (not shown) for switching the flow path of the refrigerant flowing through the condenser 164 is provided. That is, as shown in FIGS. 30A and 30B, a state in which the refrigerant is circulated in the condenser 164 disposed in the vicinity of the engaging recess 157 and a state in which the refrigerant is returned to the compressor 91 without being circulated. Can be switched between. Further, such switching control of the switching valve is performed by the control unit 98.

Note that the hygroscopic material 172 is also disposed around the entire circumference of the packing P between the first container body 61 and the first lid member 62 as in the second embodiment. It is preferable. In that case, it is preferable that the condenser 164 is also arranged in the vicinity of all the moisture absorbing materials 172. However, the hygroscopic material 172 may be arranged at several places with an interval, for example. Further, even in the same packing P portion, there is a difference in the thickness of the packing P, and when the discharge amount of cold heat is relatively different depending on the position of the packing P, the cold heat is less than that of other portions. You may selectively arrange | position the hygroscopic material 172 in the location where discharge | emission amount is relatively large.

Next, the operation of the refrigerator-freezer 170 using such a hygroscopic material 172 will be described.
At the time of steady operation, similarly to the refrigerator 50 of the first embodiment, the refrigerator 90 is operated to cool the refrigerator compartment 63, the freezer compartment 73, and the vegetable compartment 83 to the set temperatures. The hygroscopic material 172 is disposed in advance in the engaging recess 157. The operation relating to the hygroscopic material 172 will be described later.

Further, the moisture-absorbing material 172 is arranged in advance in the engaging recess 157 also during non-steady operation prior to steady operation, for example, during initial purchase during new purchase or recovery after a power failure.
Then, the cooling device 90 is operated in the same manner as in the steady operation, and the control unit 98 operates the fan 55 and the Peltier element (dehumidifier body 56) of the dehumidifier 54 in the same manner as the refrigerator 50, and the inside of the refrigerator 73 Dehumidify. By dehumidifying in this way, the moisture in the refrigerator compartment 73 can be sufficiently reduced to lower the dew point temperature, and it is possible to prevent condensation and frost formation during subsequent cooling.

However, since the moisture absorbing material 172 is disposed on the outside (outer vicinity) R of the packing P, the moisture absorbing material 172 absorbs the humidity in the outside (outer vicinity) R of the packing P and in the air ( It absorbs moisture) and generates heat. Therefore, since the hygroscopic material 172 generates heat as described above, the temperature rises outside (outer vicinity) R of the packing P as shown in FIG. 30B, thereby preventing condensation. .

Further, for the condenser 164 disposed in the vicinity of the moisture absorbing material 172, the control unit 98 performs the non-steady operation prior to the steady operation (at the time of new purchase or initial operation at the time of recovery after a power failure). The switching valve (not shown) is controlled so that the refrigerant does not flow through the condenser 164. Then, since the hygroscopic material 172 is not heated by the condenser 164, the hygroscopic material 172 adsorbs (hygroscopically) the humidity in the outside (outer vicinity) R of the packing P and in the air in the vicinity thereof, and generates heat by generating heat. Condensation on the exterior (outer vicinity) R of P is reliably prevented.

In the steady operation after the non-steady operation, the control unit 98 controls the switching valve (not shown) so that the refrigerant flows through the condenser 164. Then, the moisture-absorbing material 172 is heated to, for example, about 40 ° C. by the condenser 164 to release (dehumidify) moisture that has been absorbed earlier and become dry. Therefore, by performing the drying treatment of the moisture absorbing material 172 by switching the switching valve periodically or prior to the non-steady operation, the condensation on the outside (outer vicinity) R of the packing P is caused as described above. It can be surely prevented.

According to such a refrigerator-freezer 170 and its operation method, as in the second embodiment, the storage of cold heat in the first material (first heat storage material) is compared during non-steady operation prior to steady operation. It can be performed in a short time, and a mechanism for storing such cold energy can be configured with a simple structure to prevent an increase in cost. Moreover, since the inside of the refrigerator compartment 63 is dehumidified by the dehumidifier 54 before the cooling by such a cooling mechanism 95, it is possible to suppress the occurrence of frost and condensation in the refrigerator compartment.

Furthermore, when the inside of the refrigerator compartment 63 is cooled by the cooling mechanism 95 in the same manner as the freezer compartment 73 (in the second container 70) that is cooled in a steady operation, the first container 60 has a relatively large discharge amount of cold heat. In other words, since the moisture absorbing material 172 that generates heat when absorbing moisture is arranged outside the packing P (contains outside), dew condensation occurs outside the packing P (outside neighborhood) R due to the cool air in the refrigerator compartment 63. Can be prevented.

Further, since mesoporous silica is used as the hygroscopic material 172 and the condenser 164 is disposed in the vicinity of the hygroscopic material 172, the water absorption of the hygroscopic material 172 that has absorbed moisture by heat drying with the condenser 164 can be easily regenerated. Therefore, the hygroscopic material 172 can be used over a long period of time without being frequently replaced, for example, in a state of being disposed in the engagement recess 157.

As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above embodiment, the water condensed in the dehumidifier 54 is used for humidifying the vegetable compartment, but it may be simply discharged out of the freezer 50 and evaporated by the radiator 92 of the cooling device 90 or the like.

In the second, third, and sixth embodiments, the

hygroscopic agents

155, 162, and 172 are used to prevent condensation on the outside R of the packing P during the unsteady operation. Is not limited to this. For example, when the refrigerator-

freezers

150, 160, and 170 are used in a hot and humid environment such as the summer of Japan, the

moisture absorbents

155, 162, and 172 are used at the outside R of the packing P even during steady operation. It functions as a means to prevent condensation. In this case, the refrigerator-

freezers

150, 160, and 170 may not have the dehumidifier 54 because the non-steady operation does not have to be performed.

Further, since the

moisture absorbents

155, 162, and 172 serve as a means for preventing dew condensation on the outside R of the packing P during steady operation, the refrigerator-

freezers

150, 160, and 170 prevent condensation around the packing P during steady operation. For this reason, when a condenser or heater through which a high-temperature (about 40 ° C.) refrigerant flows is provided around the packing P, it is not necessary to constantly flow a refrigerant through the condenser or constantly flow an electric current through the heater. For this reason, in the refrigerator-

freezers

150, 160, and 170, overheating of the periphery of the packing by the condenser and the heater becomes intermittent, reducing the amount of heat flowing into the cabinet, and reducing the power consumption of the heater. Can be achieved. Note that, in the refrigerator-freezer 160, the hygroscopic agent 155 is used while being attached to the refrigerator-freezer 160 even during steady operation. In the

refrigerators

160 and 170, the condenser 164 may be used for preventing condensation around the packing P, or a condenser dedicated to preventing condensation may be provided separately from the condenser 164.

The present invention can be widely used in the field of cold storage containers that store stored items at a temperature lower than the surrounding living temperature.

DESCRIPTION OF SYMBOLS 1-5 ... Refrigerator, 10 ... Container main body, 11, 21 ... Wall material, 12, 22 ... Heat insulation part, 14, 24 ... Heat storage part, 18 ... Housing | casing, 20 ... Door member, 30 ... Reflective layer (infrared reflective layer) ), 50 ... Refrigerated refrigerator (cold container), 54 ... Dehumidifier, 55 ... Fan, 56 ... Dehumidifier body, 57 ... Container, 58 ... Discharge pipe, 59 ... Humidifier, 60 ... First container, 61 ... First Container body 62 ... 1st lid material 63 ... Cold room, 64 ... Wall material, 65 ... 1st heat insulation part, 66 ... 1st heat storage part, 70 ... 2nd container, 71 ... 2nd container body, 72 ... 1st 2 lid materials, 73 ... freezing room, 74 ... wall material, 75 ... second heat insulating part, 76 ... second heat storage part, 80 ... third container, 81 ... third container body, 82 ... third lid material, 83 ... Vegetable room, 84 ... wall material, 85 ... third heat insulating part, 86 ... third heat storage part, 90 ... cooling device (cooling means), 100 ... storage room, 101 ... opening, 1 0 ... refrigerator, 155 ... moisture-absorbing material, 160 ... refrigerator, 162 ... moisture-absorbing material, 170 ... refrigerator, 172 ... moisture-absorbing material, AR1 ... first region,
AR2 ... second region, P ... packing

Claims

A cold storage container for storage having an electrical cooling function,
A first container that stores a stored product at a temperature lower than a living temperature around the cold storage container in a steady operation, a second container that stores a stored product at a temperature lower than the first container in a steady operation, and the Cooling means for cooling the inside of the first container to a temperature lower than the surrounding living temperature, and cooling the inside of the second container to a temperature lower than that of the first container,
The first container includes a first container body and a first lid member that enables opening and closing of the space in the first container body, and the space surrounded by the first container body and the first lid member. Consists of a refrigerated room for refrigerated storage,
The first container body and the first lid member are provided at least in part between a first heat insulating portion provided to surround the refrigerator compartment and the refrigerator compartment and the first heat insulating portion. A heat storage unit,
The first heat storage unit is one or more types in which a phase transition between a liquid phase and a solid phase occurs at a temperature between a temperature controllable in the refrigerator compartment and a living temperature around the cold storage container in a steady operation. Formed using the first material consisting of
The refrigerator compartment is provided with a dehumidifier,
The cooling unit includes a cooling mechanism that cools the refrigeration chamber in the same manner as the second container that is cooled in a steady operation.
In the temperature distribution formed in the refrigeration chamber by the change over time after stopping the electrical cooling function from the steady operation state, the first is disposed in the vicinity of the first region that is relatively close to the living temperature. A part of one heat storage part has the temperature conductivity of the material as a unit area of the wall surface than the other part of the first heat storage part arranged in the vicinity of the second region that is difficult to approach the living temperature. The cold storage container according to claim 1, wherein the cold storage container is provided so that a value divided by the amount of use per unit becomes small.
The second container has a second container main body and an opening / closing mechanism capable of opening and closing a space in the second container main body, and the space in the second container main body includes a freezing room for freezing stored items. And
The second container main body includes a second heat insulating portion provided to surround the freezer compartment, and a second heat storage portion provided at least partially between the freezer compartment and the second heat insulating portion. And
The second heat storage unit is
A second material composed of one or more materials in which a phase transition between a liquid phase and a solid phase occurs at a temperature between a temperature controllable in the freezer compartment and a living temperature around the cold storage container in a steady operation. The cold-reserving container according to claim 1 or 2, wherein the container is formed by using the
The first container is provided with a temperature adjustment mechanism for adjusting the temperature in the refrigerator compartment,
4. The first material according to claim 1, wherein a peak temperature of a phase transition temperature at the time of solidification is included in a temperature range in the refrigerator compartment that can be adjusted by the temperature adjusting mechanism. 5. The cold storage container described in 1.
When the cooling chamber is cooled in the same manner as the second container that is cooled in a steady operation by the cooling mechanism, a hygroscopic material that generates heat when absorbing moisture in a region where the amount of cold heat discharged is relatively large in the first container. Is disposed, the cold insulation container according to any one of claims 1 to 4.
The cold storage container according to claim 5, wherein the hygroscopic material is a porous material.
The cold container according to claim 6, wherein the porous material is zeolite.
The cold storage container according to claim 5, wherein the moisture absorbing material is imogolite.
The cold storage container according to claim 5, wherein the hygroscopic material is mesoporous silica.
A third container;
A humidifying mechanism that uses water obtained when the dehumidifier is dehumidified by the dehumidifier is used for humidification in the third container. 10. Cold storage container.
A cold storage container for storage having an electrical cooling function,
A first container that stores a stored product at a temperature lower than a living temperature around the cold storage container in a steady operation, a second container that stores a stored product at a temperature lower than the first container in a steady operation, and the Cooling means for cooling the inside of the first container to a temperature lower than the surrounding living temperature, and cooling the inside of the second container to a temperature lower than that of the first container, and the discharge amount of cold heat in the first container are relatively A moisture absorbing material disposed in a large area and generating heat when absorbing moisture,
The first container includes a first container body and a first lid member that enables opening and closing of the space in the first container body, and the space surrounded by the first container body and the first lid member. Consists of a refrigerated room for refrigerated storage,
The first container body and the first lid member are provided at least in part between a first heat insulating portion provided to surround the refrigerator compartment and the refrigerator compartment and the first heat insulating portion. A heat storage unit,
The first heat storage unit is one or more types in which a phase transition between a liquid phase and a solid phase occurs at a temperature between a temperature controllable in the refrigerator compartment and a living temperature around the cold storage container in a steady operation. It is formed using the 1st material which consists of said material.
It is the operating method of the cold storage container according to any one of claims 1 to 10,
At the time of unsteady operation prior to the steady operation, first, the inside of the refrigerator is dehumidified by the dehumidifier,
Next, the cooling mechanism cools the first material of the first heat storage unit by cooling the refrigeration chamber in the same manner as in the second container that is cooled in a steady operation.
Then, the operation method of the cold storage container characterized by performing the said steady operation.