JP2015040633A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that can cool hot food to a low temperature in a sort time while restraining the food from freezing and that has high energy saving performance.SOLUTION: A refrigerator comprises a first storage chamber 2 in a refrigeration temperature zone, cooling means 7, first air blowing means 9a and second air blowing means 9b that blow cool air, and a first cool air passage part 101 and a second cool air passage part 102 that pass the cool air from the cooling means 7 to the first storage chamber 2, and is provided with: a first cool air circulation path in which the cool air flows through the cooling means 7, the first air blowing means 9a, the first cool air passage part 101, the first storage chamber 2, and the cooling means 7 in this order; a second cool air circulation path in which the cool air flows through the cooling means 7, the first air blowing means 9a, the second air blowing means 9b, the second cool air passage part 102, the first storage chamber 2, and the cooling means 7 in this order; and a third cool air circulation path in which the cool air flows through the first cool air passage part 101, the second air blowing means 9b, the second cool air passage part 102, the first storage chamber 2, and the first cool air passage part 101 in this order.

Description

  The present invention relates to a refrigerator.

  As a background art of this technical field, there is Japanese Patent No. 3714830 (Patent Document 1). According to claim 1 of this publication, “a storage chamber for storing stored items, a cooler for generating cool air flowing into the storage chamber, and branched first and second passages arranged behind the storage chamber” The first passage is provided on both sides of the second passage provided in the center in the horizontal direction and the cool air passage for guiding the cold air to the storage chamber, and the cold heat generated by the cold air flowing through the cold air passage is stored. A member that discharges into the room, a heat insulating member that is disposed in the first passage in contact with the member, a ceiling air passage that communicates with the second passage and through which the cool air flows along the ceiling portion of the storage chamber, A cooler that is disposed in a passage and guides the cool air cooled by the cooler to the second passage and sucks the air in the storage chamber through the opening, and passes through the cooler by driving the blower And cold air taken in from the storage room It has been described refrigerator, "which is characterized. Further, in claim 5, it is described that “an opening for discharging cool air to the storage chamber from the cold air passage sideward is provided behind the member”.

Japanese Patent No. 3714830

  In a cold air forced circulation refrigerator (refrigerator that cools the storage room by blowing low-temperature cold air cooled by a cooler), food placed in a location where cold air can easily reach is easy to cool, and cold air reaches Food placed in difficult places is hard to cool.

  In the refrigerator disclosed in Patent Document 1, as described in claim 5, an opening for discharging cold air from the cold air passage toward the side is provided. The food placed in the vicinity of the opening or in the outer periphery of the storage chamber is easily cooled by the direct arrival of cold air. On the other hand, since the cold air hardly flows in the central part of the storage room, the food placed in the central part of the storage room is difficult to cool.

  For example, when hot food is placed in the center of a storage room where cold air does not flow easily, it is placed near the opening where the cold air easily flows or the outer periphery of the storage room before the food is cooled to a predetermined low temperature. The food may be overcooled and frozen.

  On the other hand, in order to suppress freezing of food, for example, a method of periodically stopping the blowing of cold air to the storage room is conceivable. While the cooling air is stopped, the hot food placed in the storage room is cooled by heat exchange with the surrounding air and gradually decreases in temperature, but heat exchange by natural convection is dominant. Therefore, the cooling rate becomes slow.

  In addition, in the refrigerator of Patent Document 1 that discharges the cold air from the cold air passage to the side, the cold air easily reaches the wall surface of the refrigerator provided on the side of the storage room. The temperature difference increases. Since the movement of heat increases in proportion to the temperature difference, when the inner side of the wall surface becomes low temperature, heat penetration from the outside increases. Therefore, if cool air is discharged toward the side of the storage room, the amount of power consumption increases, so the energy saving performance tends to decrease.

  In addition, in the refrigerator of patent document 1, the opening part (41a of FIG. 2 of patent document 1) is provided in the center vicinity of the storage chamber other than the opening part which discharges cold air to the storage chamber toward the side. . This opening is provided to take in cool air from the storage room, and discharge of cold air from this opening is not considered. Moreover, although the refrigerator of 1st Embodiment described in patent document 1 is equipped with two air blowers, it is not described regarding these controls.

  In view of the above, an object of the present invention is to provide a refrigerator capable of reducing the temperature of a high-temperature food product in a short time while suppressing freezing of the food product and having high energy saving performance.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. To give an example, the first storage chamber in the refrigeration temperature zone, the cooling means, the first blowing means for blowing cool air, and the second A cooling means, the first blowing means, the first cooling means, and a first cooling air circulation section for circulating cold air from the cooling means to the first storage chamber. The first cold air circulation section, the first storage chamber, the first cold air circulation path through which the cold air flows, the cooling means, the first blower means, the second blower means, the second The second cold air circulation path, the first cold air circulation part, the second air blowing means, and the second cold air circulation part. , A third cold air circulation path through which cold air flows in the order of the first storage chamber and the first cold air circulation section , Characterized in that the provided.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing freezing of a foodstuff, a high temperature foodstuff can be made low temperature in a short time, and also the refrigerator with high energy saving performance can be provided.

1 is a front view of a refrigerator related to Example 1. FIG. It is AA sectional drawing of FIG. 3 is a schematic front view of the inside of the refrigerator compartment 2 relating to Example 1. FIG. It is a figure which shows the flow of the cool air in the case of performing the cooling operation of the refrigerator regarding Example 1. FIG. It is DD sectional drawing of FIG. 3 which shows the flow of the cold air discharged from the cold air distribution part 101a. It is EE sectional drawing of FIG. 3 which shows the flow of the cold air discharged from the cold air distribution part 101b. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is an example of the temperature chart in the case of starting the cooling operation of the refrigerator compartment 2 by the 1st temperature sensor 33a. It is an example of the temperature chart in the case of starting the cooling operation of the refrigerator compartment 2 by the 2nd temperature sensor 33b. It is a figure which shows the flow of the cold air in the case of performing the cold air circulation driving | operation of the refrigerator regarding Example 1. FIG. It is a figure which shows the flow of the cold air in the case of performing the cold air circulation driving | operation of the refrigerator regarding Example 1, and the cooling operation of the freezer compartment 60 and the vegetable compartment 6. FIG. It is a control flowchart of the refrigerator compartment 2 in the refrigerator regarding Example 1. FIG. It is the flow of cold air when the food in the refrigerator compartment 2 is cooled in the cooling operation. This is a flow of cold air when the food in the refrigerator compartment 2 is cooled in the cold air circulation operation. It is an example of the temperature chart in the case of starting a cold air circulation driving | operation by the 2nd temperature sensor 33b. FIG. 6 is a schematic front view of a refrigeration chamber inside in the second embodiment. It is FF sectional drawing of FIG. 12 which shows the flow of the cold air discharged from the cold air | flow distribution part 101e. It is a figure which shows the flow of the cold air in the case of performing the cooling operation of the refrigerator regarding Example 2. FIG. It is a figure which shows the flow of the cold air in the case of performing the cold air circulation driving | operation of the refrigerator regarding Example 2. FIG. This is an example in which a damper 53 a is provided in the freezer compartment cold air return port 17. This is an example in which a damper 53b is provided in the cold air return port 15 of the refrigerator compartment. This is an example in which a damper 53c is provided in the cold air return air passage 16 in the refrigerator compartment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Example 1
A refrigerator according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front view of the refrigerator according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a schematic front view of the inside of the refrigerator compartment 2 relating to the first embodiment. In FIG. 3, doors 2a, 2b, 3a, and 4a described later are omitted.

  The refrigerator 1 according to the first embodiment is a refrigeration chamber 2 that is a first storage chamber in a refrigeration temperature zone (0 ° C. or higher) as a storage chamber, and a refrigeration that is a second storage chamber in a freezing temperature zone (0 ° C. or less). Similar to the room 60 and the refrigerated room 2, it is a storage room in a refrigerated temperature zone, and includes a vegetable room 6 having a relatively higher temperature than the refrigerated room 2.

  The freezing room 60 is a general term for the ice making room 3, the upper freezing room 4, and the lower freezing room 5. The ice making room 3 and the upper freezing room 4 are arranged on the left and right, and the lower freezing room 5 is the ice making room 3 and the upper freezing room 4. It is arranged below. The refrigerating room 2 is provided with two side-opening refrigerating room doors 2a and 2b divided on the front side, and the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each a drawer type. The ice making room door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are provided. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a.

  The refrigerator 1 includes a door sensor (not shown) that detects the open / closed state, a temperature setter (not shown) that sets the temperature of the refrigerator compartment 2 and the freezer compartment 60, and the like. In order to make the doors 2a and 2b pivotable, door hinges (not shown) that are fixed to the refrigerator 1 are provided at the upper and lower portions of the refrigerator, and the upper door hinges are covered with a door hinge cover 38. Yes.

  As an example, the inside and the outside of the refrigerator 1 are separated by a heat insulating box 10 formed by filling a foamed heat insulating material of urethane foam. The upper wall surface which insulates the upper part of the refrigerator compartment 2 and the exterior of the heat insulation box 10 is called the upper wall 10a. Moreover, the heat insulation box 10 of the refrigerator 1 is mounted with a plurality of vacuum heat insulating materials 26 together with the foam heat insulating material.

  In the refrigerator 1, the refrigerator compartment 2 and the freezer compartment 60 are separated by the refrigerator compartment-freezer compartment partition wall 28, and the freezer compartment 60 and the vegetable compartment 6 are separated by the freezer compartment-vegetable compartment partition wall 29. There is no partition that separates the storage chambers of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, but the cold air in the freezing chamber 60 does not leak out from the gap between the doors 3a, 4a, and 5a. Thus, the freezer compartment partition wall 30 is provided. The freezer compartment 60 is separated from the outside by the doors 3a, 4a, and 5a and the opening edge of the freezer compartment 60 formed by the heat insulating box 10 and the partition walls 28, 29, and 30. Moreover, the refrigerator compartment 2 is separated from the exterior by the opening edge formed by the heat insulation box 10 and the partition wall 28, and the doors 2a and 2b. The vegetable compartment 6 is separated from the outside by an opening edge formed by the heat insulating box 10 and the partition wall 29 and the door 6a.

  In the refrigerator 1 of the present embodiment, a compressor 24 that compresses the refrigerant, a radiator (not shown) that releases the heat of the refrigerant that has become high-temperature and high-pressure by the compressor 24, and a capillary tube that decompresses the refrigerant (see FIG. (Not shown), the evaporator 7 serving as a cooling means that cools the cool air in the refrigerator by exchanging heat between the refrigerant and the cool air in the refrigerator constitutes a refrigeration cycle.

The evaporator 7 is provided on the back side of the freezer compartment 60 in an evaporator storage chamber 8 formed between the freezer compartment 60 and the back wall of the heat insulating box 10. In addition, a first fan 9 a that is a first blowing unit that blows the cool air cooled by the evaporator 7 to each storage chamber is provided in an upper portion of the evaporator 7.

  The refrigerator compartment 2 is provided with a plurality of shelves 39 and pockets 32 for storing stored items. The shelf 39 is a general term for the shelves 39a, 39b, 39c, and 39d. The refrigerator compartment 2 is partitioned into a plurality of spaces by the upper wall 10a, the uppermost shelf 39a, the uppermost shelf 39b, the uppermost shelf 39c, and the lowermost shelf 39d. Note that a space partitioned by the upper wall 10a and the shelf 39a, a space partitioned by the shelf 39a and the shelf 39b, a space partitioned by the shelf 39b and the shelf 39c, and a space partitioned by the shelf 39c and the shelf 39d are simply They are called the upper part of the shelf 39a, the upper part of the shelf 39b, the upper part of the shelf 39c, and the upper part of the shelf 39d.

  The pockets 32 are provided on the storage space sides of the doors 2a and 2b, respectively. Note that the food installation area of the shelf 39 (the area where food can be placed) is larger than the food installation area of the pocket 32. Moreover, the shelf 39 and the pocket 32 are removable, and the installation position can also be changed.

  In the lower part of the refrigerator compartment 2, a refrigerator compartment storage room 40 provided with a door 40a is provided. The back of the refrigerator compartment storage chamber 40 is provided with a refrigerator compartment cold air return port 15 to be described later.

  On the back surface of the refrigerator compartment 2, there are provided an air passage constituting member 80, and an air passage 11 that is composed of the air passage constituting member 80 and the heat insulating box 10. The refrigerating room cold air passage 11 is a cold air passage that guides the cold air that has become low temperature in the evaporator 7 serving as a cooling means to the refrigerating chamber 2. A cold room damper 50 is provided below the cold room air flow path 11 as first cold air blowing control means in the case of the first embodiment for controlling the cold air blowing to the cold room 2. In addition, the refrigerator compartment cold air passage 11 is connected to the first cold air circulation section 101 for communicating the refrigerator compartment 2 and the refrigerator compartment cold air passage 11, and the refrigerator compartment 2 and the refrigerator compartment cold air duct 11 are also communicated thereabove. The 2nd cold air distribution part 102 to be made is provided. The first cold air circulation unit 101 is a generic name for the cold air circulation units 101a, 101b, 101c, and 101d. The cold air circulation part 101a is provided above the shelf 39a. Similarly, the cold air circulation part 101b is provided above the shelf 39b, the cold air circulation part 101c is provided above the shelf 39c, and the cold air circulation part 101d is provided above the shelf 39d. Yes.

  A second fan 9 b serving as a second air blower is provided between the first cold air circulation unit 101 and the second cold air circulation unit 102 in the cold room air flow path 11. By driving the second fan 9b, the amount of cool air discharged from the second cool air circulation unit 102 can be increased.

  The refrigerator compartment 2 includes a first temperature sensor 33a and a second temperature sensor 33b that detect the temperature of the refrigerator compartment 2. The first temperature sensor 33a is provided above the lowermost shelf 39d of the refrigerator compartment 2 and below the upper shelf 39c of the shelf 39d, and the second temperature sensor 33b is an upper wall 10a in the refrigerator compartment 2. Is installed. A first temperature sensor 33a is provided at the lower part of the refrigerator compartment 2, and a second temperature sensor 33b is provided at the upper part to detect the temperatures of the lower and upper parts of the refrigerator compartment 2, respectively.

  In addition, since the cool air circulation part 101d which is the 1st cold air circulation part 101 is provided in the upper part of the shelf 39d, the periphery of the 1st temperature sensor 33a is mainly discharged from the 1st cold air circulation part 101. Cooled with cold air. Although details are shown in FIG. 6 to be described later, the periphery of the second temperature sensor 33 b is cooled mainly by the cold air discharged from the second cold air circulation unit 102.

  The upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are provided with storage containers 4b, 5b, 6b, respectively, which are pulled out integrally with doors 4a, 5a, 6a provided in front of the respective storage compartments. The storage containers 4b, 5b, and 6b can be pulled out by placing a hand on a handle portion (not shown) of the door and pulling it out to the front side. Similarly, the ice making chamber 3 is provided with a storage container (not shown) that is pulled out integrally with the door 3a so that the handle 3 (not shown) of the door 3a can be pulled out to the front side.

  A freezer compartment cold air passage 12, which is a cold air passage, is provided between the freezer compartment 60 and the evaporator storage compartment 8, and the freezer compartment 60 is provided between the evaporator compartment 8 and the freezer compartment cold air passage 12. There is provided a freezing compartment damper 51 which is a cold air blowing control means for controlling the cold air blowing. The freezer compartment cool air passage 12 is provided with a plurality of third cool air circulation portions 60c that allow the freezer compartment 60 and the freezer compartment cool air passage 12 to communicate with each other in the vertical direction. In the lower part of the freezer compartment 60, there is provided a freezer compartment cold air return port 17 that allows the freezer compartment 60 and the evaporator storage compartment 8 to communicate with each other.

  On the back side of the vegetable compartment 6, a vegetable compartment damper 52 (shown in FIG. 4), which is a cold air blow control means for controlling the cold air blow to the vegetable compartment 6, is provided. A vegetable room cold air return port 18 is provided on the front side of the vegetable room 6, and the vegetable room cold air return port 18 and the evaporator storage chamber 8 communicate with each other through a vegetable room cold air return air passage 19.

  In the refrigerator 1, a first temperature sensor 33 a and a second temperature sensor 33 b provided in the refrigerator compartment 2, a freezer compartment temperature sensor 34 provided in the lower freezer compartment 5, a vegetable compartment temperature sensor 35 provided in the vegetable compartment 6, evaporation The temperature of each storage room and the evaporator 7 is detected by an evaporator temperature sensor 36 provided at the upper part of the container 7. In addition, the refrigerator 1 is provided with an outside air temperature sensor 37 that detects the temperature outside the refrigerator inside the door hinge cover 38.

  On the upper part of the refrigerator 1, a control board 31 on which a CPU, a memory such as a ROM and a RAM, an interface circuit and the like, which are a part of the control device, is arranged. The control board 31 detects the first temperature sensor 33a, the second temperature sensor 33b, the freezer temperature sensor 34, the vegetable room temperature sensor 35, the evaporator temperature sensor 36, the outside air temperature sensor 37, and the open / closed state of each door. Connected to the door sensor (not shown) described above. Based on these output values and the program recorded in advance in the ROM, the CPU described above switches the driving and stopping of the compressor 24, the first fan 9a, and the second fan 9b, and the rotational speed (per time). The number of rotations), the control of each stepping motor (not shown) that opens and closes the refrigerator compartment damper 50, the freezer compartment damper 51, and the vegetable compartment damper 52 individually.

  As described above, the refrigerator compartment 2 and the vegetable compartment 6 are basically storage rooms maintained in a refrigeration temperature zone (0 ° C. or higher), and the freezer compartment 60 is a storage chamber maintained in a refrigeration temperature zone (0 ° C. or lower). In the refrigerator 1 of this embodiment, the refrigerator compartment 2 is controlled to be about 4 ° C, the vegetable compartment 6 is about 7 ° C, and the freezer compartment 60 is about -18 ° C. However, the cold room storage room 40 provided in the lower part of the cold room 2 selects a chilled temperature zone (about 0 ° C.) and an ice temperature temperature zone (about −1 ° C.) by a temperature setting device (not shown). It is also possible to control automatically.

  Next, the structure of the cold air path in the refrigerator 1 and the flow of the cold air during the cooling operation will be described. In addition, in order to distinguish from the cold air circulation operation | movement mentioned later, the operation | movement which cools each store room with the cold air cooled with the evaporator 7 is called cooling operation.

  FIG. 4 is a diagram illustrating the flow of cold air when the refrigerator cooling operation according to the first embodiment is performed. The cold air path is schematically shown, and the arrow in FIG. 4 represents the flow of the cold air.

  As shown in FIG. 2, the lower part of the evaporator 7 in the evaporator storage chamber 8 is an air path 8a, the air path 8b is between the evaporator 7 and the first fan 9a, the first fan 9a and the refrigerator compartment damper 50, The space between the first fan 9a and the freezer compartment damper 51 and between the first fan 9a and the vegetable compartment damper 52 are collectively referred to as an air passage 8c. Further, in the cold room cold air passage 11, the second fan 9b and the cold room damper 50 are referred to as an air passage 11a, and the second fan 9b and the second cold air circulation portion 102 are referred to as an air passage 11b.

  First, the cold air path structure of the refrigerator 1 in a present Example is demonstrated.

  The refrigeration room cold air path 11 provided on the back side of the refrigeration room 2 (see FIG. 2 and FIG. 3) is connected to the refrigeration room damper 50, and the air path 11a provided with the first cold air circulation part 101; It is comprised from the air path 11b provided in the subsequent flow side (downstream side). The air path 11b is provided with a second fan 9b and a second cold air circulation part 102. By the first fan 9a, the cold air from the evaporator 7 passes through the cold room damper 50 and the air passage 11a, and is discharged from the first cold air circulation part 101 to the cold room 2 along the way, and the remaining cold air is discharged from the second fan. 9b and the air path 11b, and it is discharged from the 2nd cold air distribution part 102 to the refrigerator compartment 2.

  The cool air discharged to the refrigerator compartment 2 passes through the refrigerator compartment cool air return port 15, the refrigerator compartment cool air return air passage 16, and the air passage 8a in this order, and then returns to the evaporator 7.

  The freezer compartment cool air passage 12 provided on the back side of the freezer compartment 60 (see FIG. 2) is connected to the freezer compartment damper 51, and the first fan 9a causes the cool air from the evaporator 7 to be freezer compartment cool air. Cold air is discharged into the freezer compartment 60 from the third cold air circulation part 60 c provided in the path 12.

  The cool air discharged to the freezer compartment 60 is returned to the evaporator 7 after passing through the freezer compartment cool air return port 17 and the air passage 8a in this order.

  The vegetable compartment 6 is directly connected to the vegetable compartment damper 52, and cold air is discharged from the vegetable compartment damper 52 to the vegetable compartment 6. The cool air discharged into the vegetable compartment 6 passes through the vegetable compartment cool air return port 18, the vegetable compartment cold air return air passage 19, and the air passage 8a in this order, and then returns to the evaporator 7.

  The evaporator 7 configured to allow air to circulate in the refrigerator compartment 2, the freezer compartment 60, and the vegetable compartment 6 is configured such that air flows through the first fan 9a through the air passage 8b. The first fan 9a is also connected to the above-described refrigerator compartment damper 50, freezer compartment damper 51, and vegetable compartment damper 52 by an air passage 8c.

  Next, the flow of cold air when performing the cooling operation will be described. Since the refrigerator 1 of the present embodiment cools the refrigerator compartment 2, the freezer compartment 60, and the vegetable compartment 6 with the cold air cooled by one evaporator 7, each storage compartment is connected by an air passage. The blowing of cold air to the room can be controlled by opening / closing the refrigerator compartment damper 50, the vegetable compartment damper 51, and the freezer compartment damper 52. Although control of the second fan 9b will be described later, here, the second fan 9b is described as being stopped. Note that the case where the cold air flows around the first fan 9a is considered as the cold air flowing through or passing through the first fan 9a. Similarly, when the cool air flows around the second fan 9b, it is considered that the cool air has flowed or passed through the second fan 9b.

  First, the flow of the cold air when performing the cooling operation of the refrigerator compartment 2 is shown. When performing cooling operation of the refrigerator compartment 2, the refrigerator compartment damper 50 is opened and the 1st fan 9a is driven. The cold air cooled by the evaporator 7 reaches the first fan 9a through the air passage 8b, is boosted by the first fan 9a, passes through the air passage 8c and the refrigerating room damper 50, and is stored in the refrigerating room cold air. Reach road 11. The cold air that has reached the cold air passage 11 flows through the air passage 11 a and is discharged from the first cold air circulation unit 101 to the cold compartment 2. A part of the cool air in the air passage 11 passes through the second fan 9 b and is discharged to the refrigerating chamber 2 through the second cool air circulation part 102. The cold air discharged into the refrigerator compartment 2 flows from the refrigerator compartment cold air return port 15 to the evaporator 7 through the refrigerator compartment cold air return air passage 16 and the air passage 8a, and is cooled again by the evaporator 7. Here, a cold air circulation path for discharging the cold air having become low temperature in the evaporator 7 from the first cold air circulation part 101 to the refrigerator compartment 2, that is, the evaporator 7, the first fan 9a, and the first cold air circulation part 101. The cold air circulation path in which the cold air flows in the order of the refrigerator compartment 2 and returns to the evaporator 7 is referred to as a first cold air circulation path.

  In addition, a cool air circulation path for discharging the cool air having a low temperature in the evaporator 7 from the first cool air circulation unit 102 to the refrigerator compartment 2, that is, the evaporator 7, the first fan 9a, the second fan 9b, and the second The cold air circulation path in which the cold air flows in the order of the cold air circulation unit 102 and the refrigerator compartment 2 and returns to the evaporator 7 is referred to as a second cold air circulation path.

  Next, the flow of the cold air when performing the cooling operation of the freezer compartment 60 is shown. When the cooling operation of the freezer compartment 60 is performed, the freezer compartment damper 51 is opened and the first fan 9a is driven. The cold air cooled by the evaporator 7 reaches the first fan 9a through the air passage 8b, and is boosted by the first fan 9a. The air passage 8c, the freezer compartment damper 51, and the freezer compartment cold air passage 12 are arranged in this order. It passes through and is discharged into the freezer compartment 60 from the third cold air circulation section 60c provided in the freezer compartment cold air passage 12. The cool air discharged to the freezer compartment 60 flows from the freezer compartment cool air return port 17 to the evaporator 7 through the air passage 8 a and is cooled again by the evaporator 7. Here, a cool air circulation path for discharging the cool air having a low temperature in the evaporator 7 from the third cool air circulation portion 60c to the freezer compartment 60, that is, the evaporator 7, the first fan 9a, and the third cold air circulation portion. A cold air circulation path in which cold air flows in the order of 60a and the freezer compartment 60 and returns to the evaporator 7 is referred to as a fourth cold air circulation path.

  Next, the flow of cold air during the cooling operation of the vegetable compartment 6 is shown. When performing the cooling operation of the vegetable compartment 6, the vegetable compartment damper 52 is opened and the first fan 9a is driven. The cold air cooled by the evaporator 7 flows in the order of the evaporator 7, the air passage 8 b, the first fan 9 a, the air passage 8 c, and the vegetable compartment damper 52, and is discharged from the vegetable compartment damper 52 to the vegetable compartment 6. The cold air discharged into the vegetable compartment 6 flows from the vegetable compartment cold air return port 18 to the evaporator 7 through the vegetable compartment cold air return air passage 19 and the air passage 8a, and is cooled again by the evaporator 7.

  The above is the flow of the cold air when performing the cooling operation of the refrigerator 1 in the present embodiment.

  Next, the detail of the 1st cold air distribution part 101 which discharges cold air to the refrigerator compartment 2 and the 2nd cold air distribution part 102 is demonstrated.

  5A is a DD cross-sectional view of FIG. 3 showing the flow of cold air discharged from the cold air circulation portion 101a, and FIG. 5B is a cross-sectional view of FIG. 3 EE showing the flow of cold air discharged from the cold air circulation portion 101b. is there.

  On the back side of the refrigeration room cold air passage 11 constituted by the air passage constituting member 80 and the heat insulation box 10, a vacuum heat insulating material 26 having a width L 2 wider than the width L 1 of the cold room cold air passage 11 is provided. . Since the cold air that has been cooled by the evaporator 7 and has a low temperature flows in the cold room air flow path 11 and the wall surface on the back side of the cold room air flow path 11 tends to become low temperature, The vacuum heat insulating material 26 of L2 wider than L1 is provided to suppress the intrusion of heat from the outside.

  The cold air circulation portions 101a and 101b, which are the first cold air circulation portion 101, are provided in front of the air path constituent member 80 so that the cold air is discharged forward from the air path constituent member 80.

  The cold air from the cold air circulation part 101a shown in FIG. 5a is configured to be discharged substantially perpendicular to the doors 2a and 2b. Thereby, the cold air discharged from the cold air circulation part 101a reaches the wall surface (the heat insulating box 10 and the doors 2a and 2b) after passing through the upper part of the shelf 39a.

  The cool air discharged from the cool air circulation part 101b shown in FIG. 5b is configured to be discharged obliquely forward in the refrigerator compartment. Also in this case, the cold air discharged from the cold air circulation part 101b reaches the wall surface after passing through the upper part of the shelf 39b. Although illustration is omitted, the cold air circulation portions 101c and 101d are also provided on the front side of the air passage constituting member 80, and the flow of the cold air discharged from the cold air circulation portions 101c and 101d is the same as the cold air circulation portion 101a shown in FIG. It is the same.

  As described above, the structure in which the cold air discharged from the first cold air circulation unit 101 including the cold air circulation units 101a, 101b, 101c, and 101d reaches the wall surface after passing through the upper portions of the plurality of shelves 39. Therefore, the food placed on the plurality of shelves 39 is relatively easy to cool, and the wall surface is relatively difficult to cool. When low-temperature cold air immediately after discharge reaches the wall that insulates the inside and outside of the warehouse and the inside of the wall becomes cold, the temperature difference between the inside and outside of the wall increases, and Increased heat penetration into the chamber. Therefore, if low-temperature cold air immediately after discharge continues to reach the wall surface, the wall surface is maintained in a low-temperature state and the amount of power consumption is increased, so that energy saving performance is degraded. On the other hand, in the refrigerator 1 in which the first cold air circulation unit 101 is provided on the front side of the air path constituting member 80, the cold air discharged from the first cold air circulation unit 101 flows around the food placed on the shelf 39. Since it is configured so that it can easily reach the wall surface later, the wall surface is kept at a relatively high temperature while keeping the food at a relatively low temperature, compared to a refrigerator in which the cold air immediately after discharge easily reaches the wall surface. Intrusion of heat from the outside is suppressed.

  However, since the first cold air circulation part 101 is provided in each of the spaces partitioned by the plurality of shelves 39, food may be placed in the vicinity of the first cold air circulation part 101. Low temperature cold air immediately after being discharged from the cold air circulation unit 101 may reach the food directly. Therefore, if it continues cooling with the low temperature cold air (for example, about -20 degreeC) ventilated from the evaporator 7, the food placed in the vicinity of the 1st cold air distribution part 101 will be cooled too much and it will freeze. It is done.

  6a is a cross-sectional view taken along the line BB of FIG. 6b is a cross-sectional view taken along the line CC of FIG. 6B is a cross section passing through the second fan 9b and the same cross section as that in FIG. 2, and a CC cross section in FIG. 6B is a cross section passing through the second cold air circulation portion 102. 6a and 6b both illustrate the space above the shelf 39a.

  As shown in FIG. 2, the second cold air circulation part 102 is located above the first cold air circulation part 101, that is, above the uppermost shelf 39a and the cold air circulation part 101a, and above the shelf 39a. It is provided at a position close to the upper wall 10a. Moreover, in the refrigerator 1 of a present Example, the 2nd fan 9b can be provided and the air volume of the cool air discharged from the 2nd cold air distribution part 102 can be increased.

  The second fan 9b is provided above the cold air circulation part 101a provided in the uppermost part of the first cold air circulation part 101. The second fan 9b is installed in the air passage component member 80, and the discharge side of the fan is on the rear side (right side in FIG. 6) so as to discharge to the upper right in FIG. 6a and FIG. 6b (above the back of the refrigerator 1). It is installed so that the upper side is closer to the refrigerator compartment 2 side.

  A second fan 9b is disposed at the front projection position of the vacuum heat insulating material 26 on the back of the refrigerator 1. Thereby, the heat insulation effect of the refrigerator 1 back surface which is easy to be cooled with the discharge cold air from the 2nd fan 9b can be heightened.

  As shown in FIGS. 3 and 6a, the cold air discharged from the second fan 9b reaches the air passage 11b and is turned by a cold air turning portion (not shown) provided on the heat insulating box 10 side. Toward the second cold air circulation section 102 located on the left and right of the fan 9b (in the depth direction in FIG. 6). And cold air is sent to the refrigerator compartment 2 from the some 2nd cold air distribution | circulation part 102 shown to FIG. 3, FIG. 6b.

  The cold air discharged from the second cold air circulation part 102 to the refrigerator compartment 2 flows in the vicinity of the upper wall 10a, passes through the vicinity of the second temperature sensor 33b, and reaches the pocket 32.

  Here, the second cold air circulation part 102 is provided at a position closer to the upper wall 10a than the shelf 39a, and the cold air discharged from the second cold air circulation part 102 flows in the vicinity of the upper wall 10a. Therefore, although the cool air immediately after discharge rarely reaches the food directly, the upper wall 10a tends to become low temperature due to the cool air from the second cool air circulation part 102. As shown in FIG. 5a and FIG. 5b, when the inside of the wall becomes cool, the heat intrusion from the outside increases, so the inside of the refrigerator compartment 2 is excessively cooled by the cold air from the second cold air circulation part 102. Then, there exists a subject that energy saving performance falls easily.

  Therefore, in the refrigerator 1 of the present embodiment, the following control is performed in consideration of the freezing of food and the energy saving performance shown in FIGS. 5a, 5b, 6a, and 6b.

  FIG. 7A is an example of a temperature chart when the cooling operation of the refrigerator compartment 2 is started by the first temperature sensor 33a. FIG. 7b is an example of a temperature chart when the cooling operation of the refrigerator compartment 2 is started by the second temperature sensor 33b. The temperature TR1 in the figure is the temperature detected by the first temperature sensor 33a, and the temperature TR2 is the temperature detected by the second temperature sensor 33b.

  In the refrigerator 1 of the present embodiment, when the following three start conditions are satisfied, the refrigerator compartment damper 50 is opened and the cooling operation of the refrigerator compartment 2 is started.

  The start condition (1) is “when the temperature TR2 reaches (TR2) Max (the upper limit set temperature of the second temperature sensor 33b) or higher”, and the start condition (2) is “the temperature TR1 is (TR1) Max or higher (first The start condition (3) is “the temperature TR1 reaches (TR1) Min (the lower limit set temperature of the first temperature sensor 33a) or higher” and the freezer compartment When the cooling of 60 is completed ".

  7a, when the start condition (1) is satisfied at the time t1 in the figure, and in FIG. 7b, the start condition (2) is satisfied at the time t4 in the figure, the cooling operation of the refrigerator compartment 2 respectively. Has started.

  As shown in FIGS. 2 and 6, the periphery of the first temperature sensor 33a is mainly cooled by the first cold air circulation unit 101, and the periphery of the second temperature sensor 33b is mainly the second cold air. Cooled by the circulation unit 102. Moreover, in the refrigerator 1 of a present Example, the air volume of the cool air discharged from the 1st cold air distribution part 101 and the 2nd cold air distribution part 102 is adjusted with the 2nd fan 9b. When the second fan 9b is driven, the amount of cold air discharged from the second cold air circulation portion 102 (see FIG. 4) located downstream of the cold air flow of the second fan 9b is compared with the case where the second fan 9b is stopped. However, since the air volume of the cool air discharged from the first cold air circulation part 101 located upstream hardly changes (strictly decreases), the air volume of the first cold air circulation part 101 is relatively small. The rate is reduced. Therefore, by driving the second fan 9b, compared to the case where the second fan 9b is stopped, the periphery of the second temperature sensor 33b is easily cooled, and the periphery of the first temperature sensor 33a is It becomes difficult to get cold.

  When the temperature TR2 detected by the second temperature sensor 33b shown in FIG. 7a reaches (TR2) Max, both the first fan 9a and the second fan 9b are driven to open the refrigerator compartment damper 50. Then, cool air is blown into the refrigerator compartment 2 (time t1). By driving the second fan 9b, the air volume of the cool air discharged from the second cool air circulation unit 102 is increased, and the vicinity of the second temperature sensor 33b is easily cooled.

  Since the periphery of the second temperature sensor 33b having a high temperature is preferentially cooled, the cooling around the first temperature sensor 33a is relatively suppressed, and the food placed in the vicinity of the first cold air circulation unit 101 The food around the high temperature second temperature sensor 33b can be cooled to a low temperature in a short time while suppressing freezing.

  Next, when the temperature TR2 becomes equal to or lower than (TR2) Min (the lower limit set temperature of the second temperature sensor 33b), the second fan 9b is stopped (time t2). That is, the cooling of the refrigerator compartment 2 is continued while reducing the air volume of the second cold air circulation part 102 and suppressing the cooling around the second temperature sensor 33b.

  Thereby, the cooling of the periphery of the second temperature sensor 33b that has become sufficiently low is suppressed, and the decrease in energy saving performance due to the cooling of the upper wall 10a is suppressed.

  Thereafter, when the temperature TR1 becomes (TR1) Min or less, the refrigerator compartment damper 50 is closed and the cooling operation of the refrigerator compartment 2 is finished so that the inside of the refrigerator compartment 2 is not overcooled (time t3). Thereby, the freezing of the food put in the vicinity of the 1st cold air distribution part 101 is suppressed.

  Next, FIG. 7b shows a case where the temperature TR1 detected by the first temperature sensor 33a reaches (TR1) Max. In this case, with the second fan 9b stopped, the refrigerator compartment damper 50 is opened and the first fan 9a is driven to start the cooling operation of the refrigerator compartment 2 (time t4). By stopping the second fan 9b, the cool air blow from the second cold air circulation unit 102 is suppressed, and the ratio of the air volume from the first cold air circulation unit 101 is relatively increased, so that the refrigerator compartment 2 is It is cooling. This is because the temperature of the first temperature sensor 33a is high and the periphery of the second temperature sensor 33b is relatively low, so that the reduction in energy saving performance due to cooling of the upper wall 10a is suppressed, and the periphery of the first temperature sensor 33a This is because the food in the vicinity of the high temperature first temperature sensor 33a is cooled to a low temperature in a short time.

  In addition, generally the vicinity of the 1st temperature sensor 33a which a user's hand is easy to reach has the frequency of storing foods higher than the vicinity of the 2nd temperature sensor 33b. Therefore, it is more preferable to cool the first temperature sensor 33a in preference to the vicinity of the second temperature sensor 33b. Therefore, by setting the temperature so as to satisfy the relationship of TR1 ≦ TR2, appropriate temperature control of the storage space in consideration of the use frequency can be performed.

  Thereafter, similarly to FIG. 7a, when the temperature TR1 becomes (TR1) Min or less, the cooling operation of the refrigerator compartment 2 is ended (time t5).

  Although not shown, when the start condition (3) is satisfied, the same control as in the case of the start condition (1) shown in FIG. 7a is performed.

  As described above, the refrigerator 1 of the present embodiment includes the second fan 9b that adjusts the air volume of the second cold air circulation unit 102, and the air volumes of the first cold air circulation unit 101 and the second cold air circulation unit 102. By appropriately controlling the ratio, it is possible to reduce the temperature of a high-temperature food in a short time while suppressing freezing of the food, and in addition, high energy-saving performance is obtained.

  Furthermore, in the present embodiment, the cold air circulation operation described below with reference to FIGS. 8 to 11 can reduce the temperature of the high temperature food in a short time while suppressing freezing of the food, and in addition, high energy saving. Has gained performance. The cold air circulation operation is an operation in which cold air is circulated in the refrigerating room 2 and the refrigerating room cold air passage 11 by the second fan 9b.

  FIG. 8A is a diagram illustrating a flow of cold air when the cold air circulation operation of the refrigerator according to the first embodiment is performed. FIG. 8 b is a diagram illustrating the flow of cold air when performing the cold air circulation operation of the refrigerator and the cooling operation of the freezer compartment 60 and the vegetable compartment 6 according to the first embodiment.

  Here, let the space which combined the refrigerator compartment 2 and the refrigerator compartment cold air path 11 be the space 2c. In order to allow cold air to flow into the space 2c, an air passage that allows cold air to flow into the space 2c and an air path that causes cold air to flow out of the space 2c are required. In the state where the refrigerator compartment damper 50 is opened, the air passage 8c through the refrigerator compartment damper 50 and the refrigerator compartment cold air return passage 16 through the refrigerator compartment cold air return port 15 are connected to the space 2c.

  As shown in FIG. 8 a, when the refrigerator compartment damper 50 is closed, the space 2 c and the air path 8 c are blocked by the refrigerator compartment damper 50. Since the air passage 8c is closed and the air passage connected to the space 2c is only the cold room return air passage 16, the cold air stays in the space 2c, and the outflow of the cold air from the space 2c and the cold air to the space 2c. Inflow can be suppressed. For this reason, when a pressure difference is generated in the space 2c, circulation of cold air occurs in the space 2c.

  In the refrigerator 1 of the present embodiment, a cold air circulation operation in which the cold air is circulated in the space 2c by closing the refrigerator compartment damper 50 and driving the second fan 9b can be performed. In the cold air circulation operation, the cold air in the refrigerator compartment 2 is sucked into the air passage 11a from the first cold air circulation portion 101, boosted by the second fan 9b, and then passed through the air passage 11b to pass through the second cold air circulation. It is discharged again from the unit 102 into the refrigerator compartment 2. That is, cold air circulates in the space 2c. Here, the cold air in the refrigerator compartment 2 is sucked from the first cold air circulation section 101 and the cold air is discharged from the second cold air circulation section 102 to the refrigerator compartment 2, that is, the first cold air from the refrigerator compartment 2. The cold air circulation path through which the cold air flows in the order of the circulation part 101, the second fan 9a, the second cold air circulation part 102, and the refrigerator compartment 2 is referred to as a third cold air circulation path.

  In addition, the 2nd fan 9b which ventilates cold air by cold air circulation driving | operation is also used for control of the air volume of the 2nd cold air distribution | circulation part 102 shown to FIG. The cold air circulation part and the air passage used in the cold air circulation operation are the first cold air circulation part 101, the second cold air circulation part 102, and the cold room cold air air passage 11 used in the cooling operation. Although it is conceivable to provide a fan, an air passage, and a cold air circulation section dedicated to the cold air circulation operation, the cold air circulation operation can be performed with a relatively small space and low cost by being configured as in the present embodiment.

  Moreover, by making the refrigerator compartment cold air passage 11 space-saving, the width L1 of the refrigerator compartment cold air passage 11 shown in FIGS. 5a and 5b is reduced, and the following effects are also obtained. As shown in FIGS. 5a and 5b, the heat insulation box 10 on the back side of the cold room air flow path 11 is cooled by the cold room air flow path 11 through which cold air flows, and heat intrusion tends to be relatively large. If the width L1 can be reduced, the area of the heat insulating box 10 that is cooled by the cold air in the cold air passage 11 can be reduced, and this heat intrusion can be suppressed. Further, if the width L1 can be reduced, even if the width L2 of the vacuum heat insulating material 26 is relatively small, the entire cold air passage 11 can be covered with the vacuum heat insulating material 26 (width L1 <width L2). Relatively high energy saving performance can be obtained.

  Further, in the refrigerator 1 of the present embodiment, the cold room damper 50 is closed during the cold air circulation operation, the cold air flows out from the space 2c in which the cold room 2 and the cold room air passage 11 are combined, and the cold air into the space 2c. Therefore, the freezer compartment 60 and the vegetable compartment 6 can be controlled independently.

  For example, as shown in FIG. 8b, the cold air circulation operation of the refrigerator compartment 2 and the cooling operation of the freezer compartment 60 and the vegetable compartment 6 can be performed simultaneously. In this case, the refrigerator compartment damper 50 is closed, the freezer compartment damper 51 and the vegetable compartment damper 52 are opened, and the first fan 9a and the second fan 9b are driven. As a result, the following three cold air flows are generated.

  As shown in FIG. 8a, by closing the refrigerating chamber damper 50 and driving the second fan 9b, the cold air in the refrigerating chamber 2 is sucked from the first cold air circulation section 101, and then the air passage 11a, After passing through the second fan 9b and the air passage 11b, it is discharged again from the second cold air circulation section 102 into the refrigerator compartment 2.

  In addition, in FIG. 8b, when the freezer damper 51 is opened and the first fan 9a is driven, the cool air cooled by the evaporator 7 becomes the evaporator 7, the air passage 8b, the first fan 9a, It flows through the path 8c, the freezer compartment damper 51, the freezer compartment cool air passage 12, the third cool air circulation section 60c, the freezer compartment 60, the freezer compartment cool air return port 17, the air passage 8a, and the evaporator 7. Thereby, the low temperature cold air from the evaporator 7 flows into the freezer compartment 60, and the foodstuff in the freezer compartment 60 can be cooled.

  Further, by opening the vegetable compartment damper 52 and driving the first fan 9a, the cold air cooled by the evaporator 7 is converted into the evaporator 7, the air passage 8b, the first fan 9a, the air passage 8c, and the vegetable compartment damper. 52, the vegetable compartment 6, the vegetable compartment cold air return port 18, the vegetable compartment cold air return air passage 19, the air passage 8a, and the evaporator 7 flow in this order. Thereby, the low temperature cold from the evaporator 7 flows into the vegetable compartment 6, and the food in the vegetable compartment 6 can be cooled.

  In the refrigerator 1 according to the first embodiment, the cold room damper 50 is closed during the cold air circulation operation to suppress the outflow of cold air from the space 2c and the inflow of cold air into the space 2c. It is not necessary to provide the vegetable compartment damper 52. That is, although the control of the cool air blowing to the freezer compartment 60 and the vegetable compartment 6 during the cooling operation is not performed, even when the freezer damper 51 and the vegetable compartment damper 52 are not provided, the cold air circulation operation of the refrigerator compartment 2 to be described later The effect is obtained.

  FIG. 9 is a control flowchart of the refrigerator compartment 2 in the refrigerator according to the first embodiment.

  In the refrigerator 1 of the present embodiment, the cooling operation of the refrigerator compartment 2 and the start and end of the cold air circulation operation follow this flowchart.

  The time after the start of the cooling operation is t_a, and the time after the start of the cold air circulation operation is t_b. Other symbols are the same as those in FIGS. 7a and 7b. Further, the control of the second fan 9b during the cooling operation is shown in FIGS. The effect of the control shown here will be described with reference to FIGS. 10a, 10b, and 11 described later.

  In the refrigerator 1 of the present embodiment, the cooling operation of the refrigerator compartment 2 is started when any of the start conditions (1), (2), and (3) described with reference to FIGS. 7a and 7b is satisfied (s1). (S2).

  During the cooling operation, time t_a is compared with time (t_a) max (set upper limit time of cooling operation) (s3). If the time t_a is less than (t_a) max, the cooling operation is continued, and if the time t_a is equal to or longer than (t_a) max, the operation moves to the cold air circulation operation (s3 → s7).

  If the time t_a is less than (t_a) max, the cooling operation is continued. However, before the time t_a satisfies (t_a) max or more, the temperature TR1 of the first temperature sensor 33a becomes (TR1) min or less. Then, the cooling operation is terminated (s4).

  At this time, the temperature TR2 of the second temperature sensor 33b is confirmed (s5). If the temperature TR2 is lower than (TR2) Max, the refrigerator compartment damper 50 is closed, the second fan 9b is stopped, and the blowing of cold air to the refrigerator compartment 2 is terminated (s5 → s6). On the other hand, if the temperature TR2 is equal to or higher than (TR2) Max, the process proceeds to the cold air circulation operation (s5 → s7).

  In the cold air circulation operation, the end of the cold air circulation operation of the refrigerator compartment 2 is determined based on the time t_b after the start of the cold air circulation operation and the temperature TR1 detected by the first temperature sensor 33a.

  In the present embodiment, when the time t_b is equal to or greater than (t_b) max (setting upper limit time of the cold air circulation operation) (s8), or when the temperature TR1 of the first temperature sensor 33a is equal to or greater than (TR1) Max. (S9) The temperature of the food that has become low in the cooling operation rises, and it is determined that there is no problem even if the low-temperature cold air from the evaporator 7 is blown again, and the cooling air circulation operation returns to the cooling operation (s8 or s9). → s2).

  Moreover, when temperature TR1 becomes below (TR1) Min, ventilation to the refrigerator compartment 2 is complete | finished, without returning to cooling operation (s10-> s6).

  Any one of the controls s8 and s9 for shifting from the cold air circulation operation to the cooling operation may be used. Further, for example, (TR1) Mid may be provided as an intermediate set temperature between (TR1) Max and (TR1) Min, and instead of s9, control may be performed to return to the cooling operation when TR1 becomes (TR1) Mid or higher. In addition, for example, (TR2) Mid is provided as an intermediate set temperature between (TR2) Max and (TR2) Min, and instead of s5, if TR2 is equal to or higher than (TR2) Mid, the control is shifted to the cold air circulation operation. May be.

  FIG. 10A shows the flow of cold air when the food in the refrigerator compartment 2 is cooled by the cooling operation, and FIG. 10B shows the flow of cold air when the food in the refrigerator compartment 2 is cooled by the cold air circulation operation.

  In the refrigerator 1 of FIG. 10a, a relatively low temperature food 200A is placed in the vicinity of the cold air circulation portions 101a, 101b, 101c on the shelves 39a, 39b, 39c, and a relatively high temperature food 200B is distributed in the cold air on the shelf 39d. A state in which it is placed near the portion 101d is shown. For example, assuming that food 200A is installed in the refrigerator compartment 2 several days ago, the food 200A is sufficiently cooled, and immediately after the food 200B placed outside the refrigerator is put into the refrigerator compartment 2. Yes.

  When the high-temperature food 200B is placed near the first temperature sensor 33a, the temperature TR1 detected by the first temperature sensor 33a becomes higher than (TR1) Max (see FIG. 7b), which is shown in FIG. 10a. The cooling operation of the cold air flow is started. When the heat capacity of the high temperature food 200B is large, the food 200B is difficult to cool, and it takes time for the temperature TR1 of the first temperature sensor 33a to decrease.

  As described with reference to FIG. 5, when the food placed in the vicinity of the first cold air circulation unit 101 is continuously cooled with the cold air discharged from the first cold air circulation unit 101, the food is kept at a low temperature before the start of the cooling operation. The food item 200A placed on the shelves 39a, 39b, and 39c may be excessively cooled and frozen.

  6a and 6b, when the cooling operation is continued for a long time, the low-temperature cold air cooled by the evaporator 7 continues to be discharged from the second cold-air circulation unit 102, and the upper wall 10a becomes low temperature. Easy to be. Moreover, since the temperature in the refrigerator compartment 2 falls as a whole during cooling operation, the wall surface of the refrigerator compartment 2 tends to become low temperature entirely. For this reason, if the cooling operation is continued for a long time, the heat intrusion from the outside of the warehouse becomes large, resulting in a decrease in energy saving performance.

  Here, a method for solving the freezing of the food of the food 200 </ b> A by, for example, periodically stopping the blowing of cold air to the refrigerator compartment 2 can be considered. While the cooling air is stopped, the hot food 200B placed in the storage room is cooled by heat exchange with the surrounding air and gradually decreases in temperature, but heat exchange by natural convection is dominant. Therefore, the cooling rate becomes slow.

  On the other hand, in the present embodiment, the cooling operation is performed for a predetermined time or more by the control s3 of the flowchart shown in FIG. 9, and then the operation is switched to the cold air circulation operation shown in FIG. 10b.

  When switching to the cold air circulation operation, as described in FIG. 8a, the cold air in the refrigerator compartment 2 is sucked from the first cold air circulation portion 101, and then passes through the air passage 11a, the second fan 9b, and the air passage 11b. Then, it is discharged again from the second cold air circulation section 102 into the refrigerator compartment 2. The cold air during the cold air circulation operation is hereinafter referred to as “circulated cold air”.

  The first cold air circulation unit 101 is provided at the top of each shelf 39. In the upper part of the shelf 39a is a cold air circulation part 101a, between the shelf 39a and the shelf 39b is a cold air circulation part 101b, between the shelf 39b and the shelf 39c is a cold air circulation part 101c, and between the shelf 39c and the shelf 39d is cold air circulation. Each part 101d is provided. In the cold air circulation operation of the present embodiment configured to suck the circulating cold air from the first cold air circulation part 101, it can be seen that the circulating cold air flows through the upper portions of the shelves 39a, 39b, 39c, and 39d as shown in FIG. 10b. .

  Since the circulating cold air flows through the top of each shelf 39a, 39b, 39c, 39d, the circulating cold air flows around the low temperature food 200A placed on the shelf 39a, 39b, 39c and the high temperature food 200B placed on the shelf 39d. Flow, food 200A and food 200B and circulating cold air exchange heat.

  As heat moves from high to low, the temperature of the food approaches the temperature of the circulating cold air. For example, the temperature of the food 200A is 2 ° C., the temperature of the high temperature food 200B is 20 ° C., and the temperature of the circulating cold air is 4 ° C., which is considered to be the average temperature of the refrigerator compartment 2. If the food is hotter than the temperature of the circulating cold, the heat is transferred from the food to the circulating cold, so that the food 200B at 20 ° C. is cooled by the circulating cold at 4 ° C. If the food is cooler than the temperature of the circulating cold, the heat moves from the circulating cold to the food, so the temperature of the food 200A at 2 ° C. rises and approaches the temperature of the circulating cold 4 ° C. Since temperature rises, freezing of food 200A can be controlled.

  Therefore, in the refrigerator 1 of the present embodiment, by performing the cold air circulation operation after the cooling operation, it is possible to continue cooling the high temperature food 200B while suppressing freezing of the low temperature food 200A before the start of the cooling operation. That is, a high-temperature food can be lowered to a low temperature in a short time while suppressing freezing of the food.

  Further, in the cold air circulation operation, the temperature of the low temperature food 200A is likely to rise, so that the temperature of the food 200A rises in a short time compared to the case where the cold air circulation operation is not performed, and the low temperature food even when the cooling operation is resumed. 200A becomes difficult to freeze. Therefore, by performing the cold air circulation operation, the cooling operation can be restarted in a short time while suppressing the freezing of the low temperature food 200A, and the high temperature food 200B can be further cooled to a low temperature.

  Here, as shown in FIGS. 10a and 10b, the first cold air circulation unit 101 composed of the cold air circulation units 101a, 101b, 101c, and 101d discharges cold air in the cooling operation, and cools air in the indoor circulation cold air. It is configured to inhale. That is, in both the cooling operation and the cold air circulation operation, the cold air flows through the upper portions of the respective shelves 39a, 39b, 39c, and 39d provided with the first cold air circulation unit 101. This facilitates heat exchange between the food placed on the shelf 39 and the circulating cold air, and the temperature of the low-temperature food easily rises during the circulation operation, so that freezing of the food on the shelf 39 is easily suppressed.

  The switching between the discharge and suction of the cold air in the first cold air circulation unit 101 can be confirmed by, for example, providing a tuft (light yarn) near the first cold air circulation unit 101 and photographing the movement of the tuft with a camera. . Further, for example, smoke may be generated by dry ice or the like, and the smoke flow may be confirmed by photographing with a camera.

  Furthermore, cooling by cold air circulation operation leads to improvement of energy saving performance. By the cold air circulation operation, the temperature of the low temperature food 200A is increased and the temperature of the high temperature food 200B is decreased, but the average temperature in the refrigerator compartment is almost constant. Therefore, compared with the cooling operation in which the average temperature of the refrigerator compartment 2 is lowered, The wall surface of the refrigerator compartment 2 is hard to become low temperature. Moreover, since the temperature of the cold air discharged from the second cold air circulation unit 102 is higher in the cold air circulation operation than in the cooling operation in which the low-temperature cold air of the evaporator 7 is blown, cooling of the upper wall 10a can be particularly suppressed. That is, the cooling in the cold air circulation operation is difficult for the wall surface to become low temperature and the energy saving performance is high.

  As described above, in the refrigerator 1 of the present embodiment, by providing the cold air circulation operation, while suppressing freezing of the food in the refrigerator compartment 2, the high-temperature food is brought to a low temperature in a short time, and in addition, high energy saving performance is achieved. It has gained.

  The refrigerator 1 of the present embodiment includes two temperature sensors, a first temperature sensor 33a and a second temperature sensor 33b, in the refrigerator compartment 2, and a cooling operation and a circulation operation using the two temperature sensors. Is also switched. This will be described below with reference to FIG.

  FIG. 11 is an example of a temperature chart when the cold air circulation operation is started by the second temperature sensor 33b. The dotted line after time t7 is a temperature chart when the cold air circulation operation is not performed.

  FIG. 11 shows an example in which the temperature around the second temperature sensor 33b suddenly becomes high. For example, it is assumed that high-temperature food is put in the uppermost pocket 32 (see FIG. 6).

  As shown in FIG. 7a, when the temperature around the second temperature sensor 33b becomes high and the temperature TR2 detected by the temperature sensor 33b becomes higher than (TR2) Max, The second fan 9b is driven so as to eliminate the temperature difference of the temperature sensor 33b, and the peripheral portion of the second temperature sensor 33b is preferentially cooled (time t6).

  As described above, in order to prevent the food from freezing, the temperature TR1 detected by the first temperature sensor 33a is (TR1) Min and the cooling operation is finished (time t7). The temperature around 33b is high, and the temperature TR2 is (TR2) Max or higher.

  On the other hand, in the refrigerator 1 of the present embodiment, as shown by the controls s4 and s5 in the flowchart of FIG. 9, when the temperature TR1 satisfies (TR1) Min or less, the temperature TR2 of the second temperature sensor 33b is If it is (TR2) Max or more, the refrigerator compartment damper 50 is closed and the second fan 9b is driven to shift to the cold air circulation operation (time t7).

  In the cold air circulation operation, since the food placed in the refrigerator compartment 2 and the circulating cold air in the refrigerator compartment 2 exchange heat, the food in the refrigerator compartment 2 basically approaches the average temperature of the refrigerator compartment 2. . Therefore, the temperature around the relatively low temperature first temperature sensor 33a rises, and the temperature around the relatively high temperature second temperature sensor 33b falls. Thereby, while suppressing the freezing of the food placed around the first temperature sensor 33a, the high-temperature food placed around the second temperature sensor 33b can be cooled and lowered to a low temperature in a short time. it can.

  Thereafter, in this embodiment, the control s8, s9, and s10 are determined according to the flowchart shown in FIG. In FIG. 11, the time t_b after the start of the cold air circulation operation becomes (t_b) Max or more, and the control operation s8 again shifts to the cooling operation (time t8). Since the temperature of the food placed around the first temperature sensor 33a in the cold air circulation operation is likely to rise, the cooling operation can be resumed in a shorter time than when the cold air circulation operation is not performed. While suppressing freezing of the food placed on 33a, the high-temperature food placed around the second temperature sensor 33b can be further lowered in a short time.

  As described above, in the refrigerator 1 according to the present embodiment, the two food sensors, the first temperature sensor 33a and the second temperature sensor 33b, are used to suppress the freezing of the food in the refrigerator compartment 2 and the high temperature food. The temperature is lowered in a short time.

  The above is the configuration, control, and effects of the refrigerator 1 of the first embodiment.

<< Example 2 >>
Embodiment 2 of the refrigerator according to the present invention will be described with reference to FIGS. The refrigerator 1 according to the second embodiment is a refrigerator that can independently control the blowing of cold air from the first cold air circulation unit 101 and the blowing of cold air from the second cold air circulation unit 102. In the second embodiment, the freezer damper 51 serves as a first cool air blowing control unit. In addition, about the structure same as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 12 is a schematic front view of the inside of the refrigerator compartment 2 relating to the second embodiment. FIG. 13 is a cross-sectional view taken along the line FF in FIG. 12 showing the flow of the cold air discharged from the cold air circulation part 101e. In FIG. 12, the doors 2a, 2b, 3a, 4a are omitted.

  In the present embodiment, the refrigerator compartment cold air air passage 11 is divided into two air passages 11c and 11d. The air passage 11c is provided with a first cold room damper 50a as second cold air blowing control means, and the air passage 11d is provided with a second cold room damper 50b as third cold air blowing means, which are switched. This controls the blowing of cold air to the refrigerator compartment 2.

  In the refrigerator 1 of the present embodiment, the air passage 11d is longer in the vertical direction than the air passage 11c, and the air passage 11c is arranged on the left side of the air passage 11d when viewed from the front of the refrigerator compartment 2. Further, at a position higher than the upper end of the air passage 11c, the air passage 11d is enlarged toward the air passage 11c, and the total width L1 of the air passage divided into two is utilized to the maximum.

  A second cold air circulation unit 102 is provided in the air passage 11d. The arrangement of the second cold air circulation unit 102 and the flow of the cold air discharged from the second cold air circulation unit 102 are the same as in the first embodiment. In the air passage 11d, a second fan 9b is provided between the second cold room damper 50b and the second cold air circulation unit 102, and the second cold air circulation unit 102 is driven by driving the second fan 9b. The amount of cool air discharged from the air can be increased.

  The second fan 9b is provided in the air passage 11d at a position higher than the upper end of the air passage 11c. Thereby, the big fan which utilized the total width L1 of the air path divided | segmented into two to the maximum can be arrange | positioned.

  The air passage 11c is provided with a first cold air circulation unit 101 composed of the cold air circulation units 101e, 101f, 101g, and 101h. Hereinafter, in order from the top, the cool air circulation portions 101e, 101f, 101g, and 101h are provided above the shelves 39a, 39b, 39c, and 39d, respectively.

  In FIG. 13, the flow of the cold air discharged from the first cold air circulation unit 101 is shown as a representative of the cold air circulation unit 101e. As in the first embodiment, the cold air circulation portion 101e is provided so that the cold air is discharged in front of the air passage constituting member 80, and the cold air discharged from the cold air circulation portion 101e passes through the upper part of the shelf 39a and then the wall surface. It is the structure which reaches | attains (the heat insulation box 10 and door 2a, 2b). Similarly, the cold air discharged from the cold air circulation portions 101f, 101g, and 101h reaches the wall surface after passing through the upper portions of the shelves 39b, 39c, and 39d, respectively. That is, it is easy for cold air to reach the food placed on the shelf 39, and it is difficult for cold air to reach the wall surface directly.

  As described with reference to FIGS. 5 a and 5 b, when the wall surface becomes low temperature, the heat intrusion from the outside increases, but the cold air discharged from the first cold air circulation unit 101 reaches the food placed on the shelf 39. By making it easy to do, while keeping food at a relatively low temperature, the wall surface is kept at a relatively high temperature, and the intrusion of heat from outside the container is suppressed.

  Further, as described in the first embodiment, the food installation area of the shelf 39 is generally larger than the food installation area of the pocket 32, and more food is placed on the shelf 39 than the pocket 32. Easy to be placed. Therefore, the width L3 of the air passage 11c provided with the first cold air circulation part 101 that mainly discharges cold air toward the food on the shelf 39 is made larger than the width L4 of the air passage 11, and the air passage 11c Airflow resistance is prioritized and suppressed. Since the second fan 9b is provided in the narrow air path 11d (width L4), if necessary, pressure is increased by two fans together with the first fan 9a to prevent a decrease in the air volume of the air path 11d. It is out.

  FIG. 14 is a diagram illustrating the flow of cold air when the refrigerator cooling operation according to the second embodiment is performed.

  The flow of the cold air during the cooling operation of the freezer compartment 60 and the vegetable compartment 6 is the same as that in the first embodiment, and will be omitted.

  In this embodiment, as shown in FIG. 12, the refrigerator compartment cold air passage 11 is divided into two air passages 11 c and 11 d, and the air passage 11 c includes a first refrigerator compartment damper 50 a and an air passage. 11d is provided with a second refrigerator compartment damper 50b.

  The evaporator 7 is connected to the first fan 9a by an air passage 8b. The first fan 9a is connected to the air passage 8b and the air passage 8c, and the air passage 8c is branched into four on the way, together with the freezer damper 51 and the vegetable compartment damper 52, and the first refrigerator compartment damper 50a and the first passage 9c. The second refrigerator compartment damper 50b is connected. The refrigerating room cold air passage 11 is divided into an air passage 11c and an air passage 11d, and is provided with a first refrigerating chamber damper 50a and a second refrigerating chamber damper 50b at the ends of the respective air passages. The air path 11d is provided with a second fan 9b, and the air path 11d is an air path 11d1 between the second refrigerator compartment damper 50b and the second fan 9b, the second fan 9b and the second cold air circulation part. The air path 11d2 between 102 is composed of two air paths. The air passage 11c and the air passage 11d are communicated with the refrigerating chamber 2 by the cold air circulation portions 101 and 102 provided in the air passage 11c and the air passage 11d, respectively. The room cool air return air passage 16 and the air passage 8 a are connected to the evaporator 7.

  Next, the flow of cold air blown into the refrigerator compartment 2 is shown. When sending cold air to the refrigerator compartment 2, the first refrigerator compartment damper 50a or the second refrigerator compartment damper 50b is opened and the first fan 9a is driven.

  When the first refrigerator compartment damper 50a is opened, the cold air cooled by the evaporator 7 reaches the first fan 9a via the air passage 8b, and is boosted by the first fan 9a, so that the air passage 8c, It passes through the first refrigerator compartment damper 50a and reaches the air passage 11c. The cold air that has reached the air passage 11 c is sent from the first cold air circulation unit 101 to the refrigerator compartment 2.

  When the second refrigerator compartment damper 50b is opened, the cold air cooled by the evaporator 7 reaches the first fan 9a via the air path 8b, and is boosted by the first fan 9a, so that the air path 8c, It passes through the second refrigerator compartment damper 50b and reaches the air passage 11d. The cold air that has reached the air passage 11d flows in the order of the air passage 11d1, the second fan 9b, the air passage 11d2, and the second cold air circulation portion 102, and is sent from the second cold air circulation portion 102 to the refrigerator compartment 2. In this case, by driving the second fan 9b, it is possible to increase the air volume of the cool air discharged from the second cool air circulation unit 102.

  In addition, when both the first refrigerator compartment damper 50a and the second refrigerator compartment damper 50b are opened and the first fan 9a is driven, the cold air cooled by the evaporator 7 is the first cold air circulation. It is sent to the refrigerator compartment 2 from both the part 101 and the second cold air circulation part 102.

  As described above, in the refrigerator 1 according to the second embodiment, the first cold room damper 50a and the second cold room damper 50b allow the cool air to be blown from the first cold air circulation unit 101 and the second cold air circulation unit. The blowing of cool air from 102 can be controlled independently.

  In the refrigerator 1 of Example 1, as shown in FIG. 7, the second fan 9b is controlled from the temperature detected by the first temperature sensor 33a and the temperature detected by the second temperature sensor 33b. The ratio of the air volume of the cool air discharged from the first cold air circulation unit 101 and the second cold air circulation unit 102 is changed to adjust the ease of cooling around the first temperature sensor 33a and around the second fan 33b. Was. Thereby, while suppressing freezing of the food in the refrigerator compartment 2, a high temperature food was made low temperature in a short time, and the high energy-saving performance was also acquired.

  In the refrigerator 1 of the second embodiment, in addition to the second fan 9b of the first embodiment, the first cold air circulation unit 101 and the second cold air circulation are provided by the first cold room damper 50a and the second cold room damper 50b. The blowing of any one of the cool air in the unit 102 can be stopped. Compared to the first embodiment, since the ratio of the air volume of the cool air discharged from the first cold air circulation unit 101 and the second cold air circulation unit 102 can be changed more greatly, the vicinity of the first temperature sensor 33a and the second The ease of cooling around the fan 33b can be easily adjusted, and the effect of the first embodiment can be further enhanced.

  FIG. 15 is a diagram illustrating a flow of cold air when the cold air circulation operation of the refrigerator according to the second embodiment is performed.

  In the refrigerator 1 of the present embodiment, the first refrigerator compartment damper 50a and the second refrigerator compartment damper 50b are opened, the freezer compartment damper 51 and the vegetable compartment damper 52 are closed, and the first fan 9a is stopped. The cool air circulation operation is performed by driving the second fan 9b.

  The cold air in the refrigerator air cool air passage 11d is boosted by the second fan 9b, passes through the air passage 11d2, and is sent from the second cold air circulation unit 102 to the refrigerator compartment 2. Due to the inflow of cold air from the second cold air circulation part 102, the cold air in the refrigerator compartment 2 is also pressurized, and the cold air flows from the first cold air circulation part 101 into the air passage 11c. The cold air that has flowed into the air passage 11c flows in the opposite direction to that during the cooling operation, passes through the refrigerator compartment damper 50a, and flows into the air passage 8c. The cold air flowing into the air passage 8c passes through the refrigerator compartment damper 50b and the air passage 11d and returns to the second fan 9b. Thus, by opening the first refrigerator compartment damper 50a and the second refrigerator compartment damper 50b and stopping the first fan 9a, the second fan 9b is driven, so that the refrigerator compartment cold air Cold air can be circulated in the path 11 and the refrigerator compartment 2. That is, a third cold air circulation path through which cold air flows in the order of the first cold air circulation part 101, the second fan 9a, the second cold air circulation part 102, and the cold room 2 from the cold room 2, The cold air circulation operation can also be performed in the refrigerator 1 of the second embodiment. In the cold air circulation operation of the present embodiment, the first fan 9 a does not necessarily need to be stopped, the cold air in the refrigerator compartment 2 is sucked from the first cold air circulation unit 101 and refrigerated from the second cold air circulation unit 102. If cold air is discharged into the chamber 2, it is regarded as cold air circulation operation. For example, if the first fan 9a is driven at a lower speed than during the cooling operation and controlled to suck in the cold air from the first cold air circulation unit 101, the cold air circulation operation can be performed. The direction of the cold air flowing through the first cold air circulation unit 101 can be confirmed by the tufts shown in the first embodiment.

  Here, it is conceivable that the low-temperature cold air from the evaporator 7 flows into the refrigerator compartment 2 during the cold-air circulation operation. That is, a part of the cold air in the refrigerator compartment 2 includes the refrigerator compartment 2, the refrigerator compartment cold air return port 15, the refrigerator compartment cold air return air passage 16, the air passage 8a, the evaporator 7, the air passage 8b, the first fan 9a, the wind There is a possibility that the second refrigerator compartment damper 50b, the air passage 11d1, the second fan 9b, the air passage 11d2, and the refrigerator compartment 2 flow in order through the passage 8c and circulate. However, during the cold air circulation operation, the cold air is discharged from the second cold air circulation unit 102 without discharging the cold air from the first cold air circulation unit 101 arranged so that the cold air can easily reach the food. Even if the low temperature cold air of 7 flows in, the food is difficult to freeze.

  Next, the reason why the freezer compartment damper 51 serving as the first cold air blowing control unit of the second embodiment is closed during the cold air circulation operation of the present embodiment will be described.

  In the first embodiment, the refrigerating room damper 50, which is the first cold air blowing control means of the first embodiment, is closed, and the cold air circulation operation is performed without flowing out the cold air from the space 2c (the refrigerating room 2 and the refrigerating room cold air passage 11). Had gone. On the other hand, in the second embodiment, since the circulating cold air needs to pass through the air passage 8c, the first cold room damper 50a and the second cold room damper 50b are opened during the cold air circulation operation. Therefore, when the freezer damper 51 is opened and the second fan 9b is driven, a part of the cold air in the refrigerating room 2 is stored in the refrigerating room cold air return port 15, the refrigerating room cold air return channel 16, and the freezer room cold air return port 17. And then flows into the freezer compartment 60, and then the cold air flows through the freezer compartment cold air passage 12 and the freezer compartment damper 51 in the order of the air passage 8 c, the air passage 11 d, the second cold air circulation portion 102, and the refrigerator compartment 2. . That is, a fifth cold air circulation path through which cold air flows from the freezer compartment 60 in the order of the second fan 9b, the second cold air circulation unit 102, the refrigerator compartment 2, and the freezer compartment 60 is formed. It will circulate through the freezer compartment 60. When the cold air in the refrigerator compartment 2 flows into the freezer compartment 60, the temperature rises and the food in the freezer compartment 60 may be melted.

  Therefore, in the second embodiment, the cooler damper 51 is closed to prevent the cool air from being blown between the freezer cool air air passage 12 and the air passage 8c so that the cool air does not flow into the freezer compartment 60 during the cold air circulation operation. As a result, the cold air path from the freezer compartment 60 to the refrigerator compartment 2 is closed, so that the cold air cannot flow out from the refrigerator compartment 60 to the refrigerator compartment 2, and the cold air cannot be circulated. That is, instead of the refrigerating room damper 50 which is the first cold air blowing control means of the first embodiment, the freezing room damper 51 which is the first cold air blowing control means of the second embodiment is closed, thereby freezing from the refrigerating room 2. The inflow of cold air to the chamber 60 can be suppressed, and the temperature rise of the freezer chamber 60 can be suppressed.

  In addition, even in a refrigerator that is not provided with any of the cold room damper 50 of the first embodiment, the first cold room damper 50a of the second embodiment, and the second cold room damper 50b, which is a cool air blowing control means for the cold room 2. By providing the freezer damper 51, the above-described effects related to the cold air circulation operation can be obtained. That is, the freezer damper 51 is closed, the first fan 9a is stopped or driven at a low speed, and the second fan 9b is driven, whereby the flow of cold air shown in FIG. The cold air circulation operation can be performed while suppressing the inflow of the cold air to 60.

  Further, since the vegetable room 6 is a storage room in the same refrigeration temperature zone as the refrigerated room 2, it is not always necessary to close the vegetable room damper 52, and the vegetable room damper 52 is necessarily provided for performing the cold air circulation operation of the refrigerated room 2. There is no. Next, a case where dampers 53a, 53b, 53c, and 53d, which will be described later, are used as the first cold air blowing control means will be described as another method for suppressing the inflow of cold air into the freezer compartment 60 during the cold air circulation operation.

  FIG. 16 a is an example in which a damper 53 a is provided in the freezer compartment cold air return port 17. The freezer compartment cold air return port 17 is provided with a damper 53a, and the freezer compartment cold air return port 17 is closed by closing the damper 53a during the cold air circulation operation. Thereby, inflow of the cold air from the refrigerator compartment 2 to the freezer compartment 60 via the freezer compartment cold air return port 17 during the cold air circulation operation can be suppressed.

  FIG. 16 b shows an example in which a damper 53 b is provided in the cold storage room cold air return port 15. A damper 53b is provided at the cold air return port 15 in the refrigerator compartment, and the damper 53b is closed during the cold air circulation operation so that the cold air cannot flow out of the refrigerator compartment 2 and goes to the freezer compartment 60 through the freezer cold air return port 17. Inflow of cold air can be suppressed.

  FIG. 16 c shows an example in which a damper 53 c is provided in the cold room cold air return air passage 16. A damper 53c is provided in the cold air return air passage 16 in the refrigerator compartment, and the damper 53c is closed during the cold air circulation operation, whereby the flow of cold air from the refrigerator compartment 2 to the freezer compartment 60 via the cold air return air passage 16 is performed. Can be suppressed.

  Although not shown, in addition to the first refrigerator compartment damper 50a and the second refrigerator compartment damper 50b, upstream of the first refrigerator compartment damper 50a and the second refrigerator compartment damper 52b (the air passage 8c), You may provide the refrigerator compartment damper 50 of Example 1 which controls the cool air ventilation to the refrigerator compartment 2 from the 1st fan 9a.

  In the example shown in FIGS. 16b and 16c, the cooling operation of the freezer compartment 60 can be performed simultaneously with the cold air circulation operation of the refrigerator compartment 2 as in the first embodiment. This is also shown in FIG. 4 in the cold air circulation path during the cooling operation of the freezer compartment 60 even when the dampers 53b and 53c provided in the cold compartment cold air return port 15 and the cold room cold air return air passage 16 are closed, respectively. The cooler 7, the air passage 8 b, the first fan 9 a, the air passage 8 c, the freezer damper 50, the freezer cold air passage 12, the freezer compartment 60, the freezer compartment cold air return port 17, the air passage 8 a, and the cooler 7 are configured. This is because a fourth cold air circulation path for cooling the freezer compartment 60 to be performed can be formed.

  Moreover, the damper 53a provided in the freezer compartment cold air return port 17 shown in FIG. 16a can substitute for the role of the freezer compartment damper 51 during the cooling operation. For example, when the cooling operation of the vegetable compartment 6 is performed without blowing cool air to the freezer compartment 60, the vegetable compartment damper 52 is opened, the damper 53a is closed, and the first fan 9a is driven. When the damper 53a is closed, the freezer compartment cold air return port 17 is closed and the cold air cannot flow out of the freezer compartment 60. Therefore, even if the first fan 9a is driven to cool the vegetable compartment 6, the freezer compartment 60 The inflow of cold air to can be suppressed.

  The above is the refrigerator of Examples 1 and 2.

  In addition, this invention is not limited to each Example mentioned above, Various modifications are included. For example, each of the above-described embodiments has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the configurations described. For example, in the refrigerator 1 according to the first and second embodiments, the first cold air circulation unit 101 is provided at the upper part of each shelf 39, but it is not necessarily required to be provided at the upper part of all the shelves 39.

  Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1 Refrigerator 2 Refrigerated room (first storage room)
3 Ice making room (second storage room)
4 Upper freezer room (second storage room)
5 Lower freezer room (second storage room)
6 Vegetable room 7 Evaporator (cooling means)
8, 8a, 8b, 8c Evaporator storage chamber 9a First fan (first blowing means)
9b Second fan (second blowing means)
10 Heat insulation box 11 Cold room cold air passage (cold air passage)
12 Freezer compartment cold air passage 13 Vegetable compartment cold air passage 15 Refrigerating compartment cold air return passage 16 Refrigeration compartment cold air return passage 17 Freezer compartment cold air return passage 18 Vegetable compartment cold air return passage 19 Vegetable compartment cold air return passage 24 Compressor 28 Refrigeration compartment -Freezer compartment partition wall 29 Freezer compartment-Vegetable compartment partition wall 30 Freezer compartment partition wall 31 Control board 32 Pocket 33a First temperature sensor 33b Second temperature sensor 34 Freezer compartment temperature sensor 35 Vegetable compartment temperature sensor 36 Evaporator temperature sensor 37 Outside air temperature sensor 38 Door hinge cover 39 Shelf 40 Refrigerating room storage room 50 Refrigerating room damper (first cold air blowing control means of embodiment 1)
50a First cold room damper (second cold air blowing control means)
50b Second refrigerator compartment damper (third cool air blowing control means)
51 Freezer compartment damper (first cold air blowing control means of embodiment 2)
52 Vegetable room damper 60 Freezer room (second storage room)
80 Airway component 101, 101a-101h 1st cold air distribution part 102 2nd cold air distribution part 200A, 200B Foodstuff

Claims (3)

A first storage chamber in a refrigerated temperature zone, a cooling means, a first blowing means for blowing cold air, a second blowing means, and a first for circulating cold air from the cooling means to the first storage chamber A cold air circulation part and a second cold air circulation part,
A first cold air circulation path through which cold air flows in the order of the cooling means, the first air blowing means, the first cold air circulation section, the first storage chamber, and the cooling means;
A second cold air circulation path through which cold air flows in the order of the cooling means, the first air blowing means, the second air blowing means, the second cold air circulation section, the first storage chamber, and the cooling means;
A third cold air circulation path through which cold air flows in the order of the first cold air circulation part, the second air blowing means, the second cold air circulation part, the first storage chamber, and the first cold air circulation part; A refrigerator characterized by providing. A second storage chamber in a refrigeration temperature zone, and a third cold air circulation section for circulating cold air from the cooling means to the second storage chamber,
A fourth cold air circulation path through which cold air flows in the order of the cooling means, the first air blowing means, the third cold air circulation section, the second storage chamber, and the cooling means;
A fifth cold air circulation path through which cold air flows in the order of the second air blowing means, the first storage chamber, the second storage chamber, and the second air blowing means,
2. The refrigerator according to claim 1, wherein cold air blowing control means for controlling blowing of cold air of the fifth cold air circulation path is provided in the fifth cold air circulation path. In the first cold air circulation path, the second cold air circulation path is provided with a second cold air blowing control means for controlling the blowing of the cold air in the first cold air circulation path, and the second cold air circulation path is provided in the second cold air circulation path. A third cold air blowing control means for controlling the cold air blowing of
The second cold air blowing control means and the third cold air blowing control means control the cold air blowing of the first cold air circulation path and the second cold air circulation path, respectively, The refrigerator according to claim 1 or 2.