JP2000105058A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling refrigerator in which an occurrence of dew formation at a circumferential edge of an opening of a storing chamber can be prevented without arranging either a high temperature refrigerant pipe or an electrical heater at a circumferential edge of the opening of the storing chamber. SOLUTION: A cooling refrigerator 1 constitutes a storing chamber 9 in a thermal insulating box 2 having thermal insulating material filled between an outer plate 3 and an inner plate 4, wherein the storing chamber 9 is cooled by a cooling device installed in the machine chamber 27 formed at a thermal insulating box 2. There is provided a head pipe 14 ranging from the thermal insulating material of the outer plate positioned at a circumferential edge of opening of the storing chamber 9. This heat pipe 14 is applied such that the machine chamber 27 is a heat receiving section 28 and an opening circumferential edge is a thermal radiating section 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage cooler for cooling a storage room by a cooling device installed in a machine room.

[0002]

2. Description of the Related Art This type of cooling storage, which has been conventionally used as a low-temperature showcase, has a main body constituted by a rectangular heat-insulating box opening to the front, and this heat-insulating box is made of stainless steel opening to the front. It is constructed by filling a foamed polyurethane insulation between the outer plate and the inner plate. In addition, a storage room having an opening on the front surface is formed in the heat insulating box, and the opening is rotatably supported on the front surface of the heat insulating box and is formed of a transparent wall through which the inside can be seen. The door is openably closed by a closed door.

In this storage room, a cooler and a blower constituting a cooling device are installed, and in a machine room formed at a lower part of the heat insulating box, a compressor, a condenser and a condenser for the same cooling device are formed. A blower and the like are installed and constitute a known refrigerant circuit.

[0004] When the compressor and each blower are operated, the cooler exerts a cooling action, and cool air that has exchanged heat with the cooler is blown into the storage chamber by the blower. As a result, the storage chamber is cooled to a predetermined temperature.

[0005] In such a cooling storage, since the periphery of the front opening of the storage room, which is the connection portion between the inner plate forming the inside of the storage and the outer plate forming the outside of the storage, is cooled by heat conduction from the storage. Condensation forms around the opening. This dew drops on the floor where the cooling storage is installed, damaging the floor and corroding the outer panel. In addition, this dew condensation causes a short circuit, and further has a problem that the clothes of the customer get wet.

Therefore, conventionally, an electric heater for preventing dew condensation or a high-temperature refrigerant pipe of a refrigerant circuit of a cooling device is arranged on the periphery of the opening of the heat insulating box, and the opening is heated to prevent the dew condensation. Was.

[0007]

However, in the case of using the above-mentioned electric heater, the electric power must be always supplied, so that a problem arises that the electric bill rises. Also,
The method of arranging the high-temperature refrigerant pipe of the cooling device on the periphery of the opening complicates the refrigerant circuit and causes a problem that the operation becomes complicated during maintenance of the cooling device. Furthermore,
This method is not feasible in a cold storage where the cooling device can be separated from the insulated box.

Further, in the method of preventing dew condensation using an electric heater and a refrigerant pipe, since heating cannot be performed locally, a portion that does not require heating, for example, a portion that receives direct sunlight or generates heat that is installed adjacently. There is also a problem that heating is performed up to the portion heated by the device, causing a partial rise in temperature due to excessive heating.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and it is necessary to provide a high-temperature refrigerant pipe and an electric heater on the periphery of the opening of the storage chamber without providing a dew condensation on the periphery of the opening of the storage chamber. An object of the present invention is to provide a cooling storage that can prevent the generation.

[0010]

SUMMARY OF THE INVENTION The cooling storage of the present invention comprises:
A storage room is formed in a heat insulating box formed by filling a heat insulating material between an outer plate and an inner plate, and the storage room is cooled by a cooling device installed in a machine room formed in the heat insulating box. A heat pipe extending from the heat insulating material side of the outer plate located at the opening periphery of the storage room to the machine room.The heat pipe has a heat receiving portion on the machine room side and a heat dissipating portion on the opening periphery side. It is a feature.

According to the present invention, the storage chamber is formed in the heat insulating box formed by filling the heat insulating material between the outer plate and the inner plate, and is stored by the cooling device installed in the machine room formed in the heat insulating box. In a cooling storage room that cools the inside of a room, a heat pipe is provided from the heat insulating material side of the outer plate located at the periphery of the opening of the storage room to the machine room. The heat medium in the heat pipe evaporated in the heat receiving portion heated in the machine room moves to the heat radiating portion, where it radiates heat to heat the outer plate around the opening. Then, the heat medium condensed in the heat radiating portion repeats the circulation moving to the heat receiving portion again.

Thus, it is possible to prevent the dew condensation on the outer plate at the periphery of the opening by using the waste heat of the machine room without attaching the refrigerant pipe and the electric heater to the periphery of the opening of the storage room. On the other hand, since the processing of waste heat is promoted in the machine room, the load is reduced, the cooling capacity is improved, and the machine room can contribute to energy saving as a whole.

In particular, since the heat medium in the heat radiating portion is actively condensed at a place where the temperature is low, a place requiring heating, that is, a place where dew condensation is most likely to be concentrated is mainly heated to effectively prevent dew condensation. Can be achieved. And since it becomes difficult to condense in a place where the temperature is relatively high, partial overheating is also eliminated.

According to a second aspect of the present invention, in addition to the above-mentioned invention, the cooling device is characterized in that the cooling device can be separated from the heat insulating box.

In the cooling storage according to the second aspect of the present invention, in addition to the above-mentioned invention, the cooling device can be separated from the heat insulating box. This eliminates the necessity of performing such operations, improves the workability of assembly and maintenance, and can prevent the occurrence of failures and accidents.

[0016]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cooling storage 1 to which the present invention is applied.
FIG. 2 is a vertical sectional side view of the cooling storage 1, and FIG. 3 is a side view of the cooling storage 1.

The main body of the cooling storage 1 of the embodiment is constituted by a rectangular heat-insulating box 2 opening to the front. The heat insulating box 2 is made of a stainless steel outer plate 3 having an opening on the front surface.
And an inner plate 4 having an opening on the front surface and a foamed polyurethane heat insulating material 5 between a substantially portal-shaped bottom plate 6.

The bottom plate 6 is located at a distance below the bottom wall 4A of the inner plate 4, and is located at the periphery of the front opening of the heat insulating box 2 (the opening 8 of the storage room 9 described later). A heat pipe 14, which will be described in detail later, is disposed over the heat insulating material 5 side of the bottom plate 6 and the heat insulating material 5 side of the bottom plate 6. In addition, pedestals 23 are respectively attached to the lower four corners of the heat insulating box 2.

The bottom wall 4A of the inner plate 4 and the top wall 6A of the bottom plate 6
A suction port 16 and a discharge port 17 are formed between the front and rear portions so as to penetrate the heat insulating material 5 therebetween.

On the other hand, the storage chamber 9 having the front opening 8 is formed in the inner plate 4. The opening 8 is closed openably and closably by a door 10 formed of a transparent wall through which the inside can be seen through. The door 10 is pivotally supported on the right front surface of the heat insulating box 2 so as to be rotatable.

And, on the lower surface of the top wall 6A of the bottom plate 6,
A heat insulating box 13 having an opening on the upper surface is provided in contact with the air conditioner, and a cooler 11 constituting a cooling unit of a cooling device is installed in the heat insulating box 13.
2 are installed. The inside of the storage chamber 9 and the heat insulating box 13 communicate with each other via the suction port 16 and the discharge port 17, and the suction port 16 is provided at a front upper portion of the cooler 11, and the discharge port 17 is provided at a rear upper portion of the blower 12. Corresponding.

On the other hand, on the inside of the back wall 4B of the inner plate 4,
A partition plate 15 that forms a duct 18 that connects the discharge port 17 formed in the bottom wall 4A and the upper part of the storage room 9 is attached. The partition plate 15 has a plurality of openings (not shown) for supplying cool air discharged from the blower 12. A plurality of shelves 19 for placing foods and the like are installed in the storage room 9.

On the other hand, a machine room 27 is formed in the bottom plate 6 below the heat insulating box 13. In the machine room 27, a mounting table 25 to which casters 24 for enabling movement at four corners are mounted is housed, and the mounting table 25 has a compressor 20 which constitutes a condensing unit of the cooling device. , A condenser 21 and a condenser blower 22, and a control box (not shown). Also,
An openable / closable panel 26 is attached to the front of the machine room 27 to conceal the machine room 27.

Here, the cooler in the heat insulating box 13 is
5 and connected to the compressor 20 and the condenser 21 by a refrigerant pipe, and constitutes a well-known refrigerant circuit. Insulation box 1
Reference numeral 3 is provided above the mounting table 25 and is detachable from the top wall 6A of the bottom plate 6. As a result, the heat insulation box 13, the cooler 11, the blower 12, the compressor 20, the condenser 21, and the like are mounted on the machine room 2 together with the mount 25 using the casters 24.
The cooling device can be separated from the heat-insulating box 2.

That is, when the cooling device is mounted on the heat-insulating box 2, the mounting table 25 is housed in the machine room 27, and then the mounting table 25 is fixed to the heat-insulating box 2 by a fixture (not shown). 13 is fixed to the bottom plate 6. And the compressor 2
When maintenance such as 0 is performed, these fixings are released and the mounting table 25 is pulled out from the machine room 27 (FIG. 4).
Things.

Next, the heat pipe 14 will be described. The heat pipe 14 is shown in FIG. 1, FIG. 3, FIG.
, The storage room 9
Side wall 6B of the bottom plate 6 from the side of the heat insulating material 5 of the inward flange 3A at the opening edge of the outer plate 3 located at the peripheral edge of the opening 8
7 (which constitute the side surface of the heat insulating material 7). The heat pipe 14 is composed of a heat receiving portion 28 located on the machine room 27 side and a heat radiating portion 29 located on the periphery of the opening 8, and the inside of the heat pipe 14 is filled with a predetermined heat medium. ing.

The heat receiving section 28 is provided on the bottom plate 6 as shown in FIG.
The side wall 6B is arranged in a meandering manner on the surface of the side wall 6B on the side of the heat insulating material 5, and is fixed to the side wall 6B by the heat insulating material 5 filled with foam. This heat receiving section 28 is
It is heated by heat discharged from the compressor 20 and the condenser 21 in the inside.

On the other hand, the heat dissipating portion 29 is disposed at the corner heat insulating material 5 side of the inward flange 3A of the outer plate 3 located at the periphery of the opening 8 of the storage room 9 as shown in FIG. ing.
Reference numeral 30 denotes a resin breaker for connecting the outward flange 4C of the opening edge of the inner plate 4 and the outward flange 3A of the outer plate 3.

With the above arrangement, when the compressor 20, the blower 12, and the condenser blower 22 are operated, the cooler 11 exerts a cooling action, and the cool air exchanged with the cooler 11 is discharged from the discharge port 17. It is blown out into the storage room 9. Then, after being circulated in the storage room 9, it is sucked through the suction port 16. Thereby, the inside of the storage room 9 is maintained at a predetermined refrigeration temperature. Further, the periphery of the opening 8 of the storage room 9 is also cooled by heat conduction from the inner plate 3 and the like, and the radiator 29 of the heat pipe 14 disposed at the periphery of the opening 8 is also cooled.

On the other hand, when the compressor 20 and the condenser 21 are operated, the heat receiving portion 28 of the heat pipe 14 disposed on the side wall 6B of the bottom plate 6 is heated.
The heat medium filled therein is also heated and evaporates. The evaporated heat medium moves to the heat radiating portion 29 arranged on the periphery of the opening 8 and radiates heat there to heat the outer plate 3 on the periphery of the opening 8. Then, heat is radiated by the heat radiating unit 29, and the heat medium condensed by itself circulates again to the heat receiving unit 28 by its own weight.

Accordingly, the high temperature refrigerant pipe and the electric heater are not attached to the periphery of the opening 8 of the storage
The dew condensation on the outer plate 3 at the periphery of the opening 8 can be prevented by using the waste heat of 7. On the other hand, since the processing of waste heat is promoted in the machine room 27, the load on the compressor 20 is reduced and the cooling capacity is improved, so that it is possible to contribute to energy saving as a whole.

In particular, since the heat medium in the heat radiating section 29 radiates heat at a low temperature, the heat medium needs to be heated,
That is, it is possible to achieve the effective prevention of dew condensation by heating the places where dew condensation is most likely. And since it becomes difficult to condense in a place where the temperature is relatively high, partial overheating is automatically eliminated.

In the present embodiment, the compressor 20, the condenser 21, the condenser blower 22,
Although the equipment such as the cooler 11 can be pulled out by the mounting base 25, the use of the heat pipe 14 as described above allows the mounting base 25 to be pulled out as in the case of using a high-temperature refrigerant pipe or an electric heater. There is no need to cut the refrigerant pipes or separate the electrical wiring when drawing out, so that the assembling and maintenance workability is improved, and the occurrence of failures and accidents can be avoided.

In the above embodiment, the heat receiving portion 28 of the heat pipe 14 is attached to the side wall 6B of the bottom plate 6 (constituting the side surface of the machine room 27). However, the present invention is not limited to this. The wall 6A (which constitutes the top surface of the machine room 27) may be heat-exchangeably attached to the surface of the heat insulating material 5 side. In particular, in this case, waste heat can be effectively absorbed by the heat that has risen from the compressor 20 and the condenser 21.

[0035]

As described above in detail, according to the present invention, a storage room is formed in a heat insulating box formed by filling a heat insulating material between an outer plate and an inner plate, and a storage room is formed in a machine room formed in the heat insulating box. In a cooling storage room that cools the storage room by an installed cooling device, a heat pipe is provided from the heat insulating material side of the outer plate located at the periphery of the opening of the storage room to the machine room, and the heat room side of the heat pipe receives heat. The heat medium in the heat pipe evaporated in the heat receiving part heated in the machine room moves to the heat radiating part, and radiates heat there to heat the outer plate of the opening rim. . Then, the heat medium condensed in the heat radiating portion repeats the circulation moving to the heat receiving portion again.

Thus, it is possible to prevent the dew condensation on the outer plate at the periphery of the opening by using the waste heat of the machine room without attaching the refrigerant pipe and the electric heater to the periphery of the opening of the storage room. On the other hand, since the processing of waste heat is promoted in the machine room, the load is reduced, the cooling capacity is improved, and the machine room can contribute to energy saving as a whole.

In particular, since the heat medium in the heat radiating portion is actively condensed at a place where the temperature is low, a place requiring heating, that is, a place where dew condensation is most likely to be concentrated is heated to prevent effective dew condensation. Can be achieved. And since it becomes difficult to condense in a place where the temperature is relatively high, partial overheating is also eliminated.

Further, when the cooling device is separable from the heat insulating box as in the second aspect of the present invention, there is no need to cut the refrigerant pipe or separate the electric wiring to separate the cooling device. Therefore, assembling / maintenance workability is improved, and the occurrence of failures and accidents can be avoided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooling storage to which the present invention is applied.

FIG. 2 is a longitudinal sectional side view of the cooling storage of FIG. 1;

FIG. 3 is a side view of the cooling storage of FIG. 1;

FIG. 4 is an exploded perspective view of the cooling storage of FIG. 1;

FIG. 5 is a perspective view of a heat insulating box.

FIG. 6 is an enlarged plan sectional view of an opening edge of the storage room.

FIG. 7 is a perspective view of a heat insulating box of a cooling storage according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling storage 2 Heat insulation box 3 Outer plate 4 Inner plate 5 Heat insulating material 6 Bottom plate 8 Opening 9 Storage room 14 Heat pipe 20 Compressor 21 Condenser 22 Blower 24 Caster 25 Mounting stand 27 Machine room 28 Heat receiving part 29 Heat radiating part

Claims (2)

[Claims] 1. A storage room is formed in a heat insulating box formed by filling a heat insulating material between an outer plate and an inner plate, and the storage room is formed by a cooling device installed in a machine room formed in the heat insulating box. In a cooling storage unit formed by cooling, a heat pipe extending from a heat insulating material side of an outer plate positioned at an opening edge of the storage chamber to the machine room is provided. A cooling storage, characterized in that an edge side is a heat radiating part. 2. The cooling storage according to claim 1, wherein the cooling device is separable from the heat insulating box.