JP2002107044A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance cooling efficiency while preventing condensation at an opening 30, without influencing the inside temperature of a refrigerator. SOLUTION: A piping arrangement for a tubular radiator 52 is provided at the inner edge portion of the opening 30, to which a cover and a door are brought contact. The radiator 52 is arranged singly around the opening 30 as though it is drawn in a single stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a refrigerator having improved cooling efficiency.

[0002]

2. Description of the Related Art Refrigerators (including refrigerators) have a housing formed by filling a heat insulating material between an inner box and an outer box, and an inner space is partitioned by a partition wall. A plurality of rooms, such as a room, a freezer room, and a vegetable room, are formed to meet diversifying needs.

Each room is provided with an opening on the front side for taking in and out food and the like, and the opening is closed by a lid or a door.

FIG. 12 is a perspective view showing a schematic configuration of the refrigerator compartment when a lid or the like is removed.
11 refrigerated room 112, vegetable room 113,
An ice room 114, a freezing room 115 and the like are formed.

[0005] The refrigerator is a refrigerant comprising a compressor for compressing the refrigerant, an elongated tubular radiator for releasing and condensing the refrigerant, a decompression device for reducing the pressure of the refrigerant, and an evaporator for evaporating the refrigerant to generate cold heat. It has a circuit, and cools the air in the refrigerator by the cold generated by the refrigeration circuit, thereby cooling foods and the like stored in the refrigerator.

At this time, each opening edge portion 1 against which a lid or a door abuts.
Since the condenser 16 is cooled by the air inside the refrigerator, dew condensation may occur. Therefore, the radiator 121 is formed in an elongated tubular shape, and is laid on the opening edge 116 as shown in FIG. The section 116 is heated to prevent the occurrence of dew condensation.

FIG. 13 is a partial cross-sectional view of the partition wall 111. A radiator 121 is laid inside the partition wall 111 of the partition wall against which the door or lid 117 contacts.

[0008]

However, in the conventional refrigerator, since the radiator 121 is laid so as to double surround the opening, the amount of heat radiated at the portion is large for preventing dew condensation. Too long, which affects the temperature inside the refrigerator (causes a rise in temperature), and lowers the cooling efficiency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigerator having an improved cooling efficiency by preventing dew condensation at an opening and not affecting the temperature in a refrigerator.

[0010]

In order to solve the above-mentioned problems, the present invention according to claim 1 comprises a compressor for compressing a refrigerant, an elongated tubular radiator for radiating and condensing the refrigerant, and depressurizing the refrigerant. A decompression device and a refrigeration circuit formed by an evaporator that generates cold heat by evaporating the refrigerant are provided, and the inside of the housing is divided into a plurality of rooms by partition walls, and an opening of each room has a lid or In a refrigerator in which each room is cooled by cold generated by a refrigeration circuit by contacting a door and closing the room, a tubular radiator is laid and piped inside the edge of the opening where the lid and the door abut, In this case, the radiator was laid down with one brush so as to surround the opening in a single layer, and the cooling efficiency was enhanced by preventing the dew condensation at the opening while preventing the inside temperature from being affected. It is characterized by the following.

According to a second aspect of the present invention, carbon dioxide is used as a refrigerant, a compressor is formed by a first-stage compression element and a second-stage compression element, and the refrigerant from the first-stage compression element is cooled to cool the second-stage compression element. And an intermediate cooler for supplying the refrigerant to the radiator by compressing the refrigerant in two stages.

The invention according to claim 3 is characterized in that when the partition wall partitions a room having a different temperature band, the radiator laid on the partition wall is laid close to the room side in the low temperature band. I do.

According to a fourth aspect of the present invention, a heat transfer member that is in thermal contact with a radiator that is laid close to the radiator is disposed at an edge of the opening where the radiator is not laid. It is characterized in that the heat of the radiator is conducted to the portion for heating.

According to a fifth aspect of the present invention, the heat transfer member comprises:
It is characterized by being at least one of copper, aluminum, and heat conductive putty.

According to a sixth aspect of the present invention, an electric heater or an intercooler for heating the radiator is provided at a portion of the edge of the opening where the radiator is not laid, or an adjacent radiator is connected to the portion. It is characterized by having been extended and laid down.

According to a seventh aspect of the present invention, in order to heat a portion where the radiator is also laid on the side surface of the housing and where the radiator is not laid at the edge of the opening, the radiator is extended to the portion. In the case of extending and laying, the radiator laid on the side surface is laid in such a manner as to bypass the radiator.

According to the eighth aspect of the present invention, when the heat radiator or the heat transfer member is laid and fixed inside the edge of the opening,
It is characterized in that the heat transfer range is widened and fixed by a member having high heat conductivity such as aluminum tape so that heat transfer can be performed quickly.

According to a ninth aspect of the present invention, the radiator is fixed to a place where the radiator is laid twice by a low heat conductive member such as a paper tape or a resin tape. It is characterized in that the sex member is laid so as to be inside the refrigerator.

[0019]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the refrigerator 10, and FIG. 2 is a sectional view thereof.

The housing of the refrigerator 10 is formed by integrating an outer box 11 made of a magnetic metal such as iron and an inner box 12 made of a synthetic resin such as ABS via a foam insulating material 13 such as polyurethane foam. In the internal space, a plurality of partition walls 14 (14
a, 14b, 14c), and a refrigerator room 18, a vegetable room 19, an ice room 20, a select room 21, a freezer room 22 and the like are provided.

In the case of such a configuration, for example, the partition wall 14a for partitioning the refrigerator compartment 18 and the vegetable compartment 19 and the partition wall 14b for partitioning the freezer compartment 22 from the ice room 20, the select room 21, and the like. A communication hole 15 is provided in a partition wall 14 of a room near the temperature zone so that air in the refrigerator can flow through these rooms.

On the other hand, since the temperature range of the vegetable room 19 and the ice room 20 are greatly different from each other, the communication hole 15 is not provided in the partition wall 14c for partitioning these rooms.

The select room 21 is, for example, about 3
℃ refrigerated room, set to about 1 ℃ chilled room,
It is used as an ice temperature room set at about -1 ° C, a partial room set at about -3 ° C, a soft freezing room set at about -7 ° C, and a freezing room set at about -18 ° C. Things.

A door 25 is provided in the front opening 30 of the refrigerator compartment 18 so that the vegetable compartment 19, the select room 21,
The lid 26 (26a, 26b, 2)
A drawer marked 6c) is provided. Of course, the door 25 and the lid 26 are provided with a heat insulating material.

When the door 25 and the drawer are closed, the opening 30 is closed, and a magnet 27 is mounted on the door 25 and the lid 26 which are in contact with the opening edge 31 so as to maintain this state. A door packing 28 is provided (see FIG. 6).

Such a refrigerator is provided with a refrigeration circuit as shown in FIGS. FIG. 4 shows FIG.
FIG. 3 is a diagram showing the refrigeration circuit shown in FIG.

Such a refrigeration circuit includes a compressor 51 for compressing the refrigerant, a radiator 52 for radiating and condensing the refrigerant, a decompression device 53 for decompressing the refrigerant, an evaporator 55 for evaporating the refrigerant to generate cold heat, and the like. And these are connected by a refrigerant pipe.

In recent refrigerators, the evaporator 55 has a first evaporator 55a provided for the refrigerator compartment 18 and the vegetable compartment 19 and the like, and a second evaporator 5 provided for the freezer compartment 22 and the ice compartment 20 and the like.
5b, and FIGS. 3 and 4 show such a case.

The first evaporator 55a and the second evaporator 55
4b is not operated at the same time, as shown in FIG.
5 so that the refrigerant circulates through both of them in the case of simultaneous operation. At this time, of course, the amount of the refrigerant circulating through each evaporator 55 is determined according to the movement of the three-way valve 54 (the degree of flow path switching).

The compressor 51 is disposed below the bottom of the refrigerator, the first evaporator 55a is located on the upper rear side of the refrigerator compartment 18, and the second evaporator 55b is located in the freezer compartment 22 or the ice compartment 20.
Is provided on the back side.

The radiator 52 is a refrigerant pipe extending and laid on the upper surface and the side surface of the housing and the opening edge portion 31. On the upper surface and the side surface of the housing, the outer radiator 11 and the foam heat insulating material 13 are mainly used. And is fixed by the foamed heat insulating material 13.

On the other hand, as shown in FIG. 5, a radiator 52 is laid in a single stroke around the opening 30 so as to surround the opening 30 in a single stroke. Is cooled to prevent condensation.

FIG. 6 is a partial sectional view showing a state of a partition wall 14c for partitioning the vegetable room 19 and the ice room 20.
FIG. 7 is a partial cross-sectional view showing a state of the partition wall 14 that partitions the freezing room 22 and the ice room 20.

When the set temperature zone is distant like the vegetable room 19 and the ice room 20, the radiator 52 is provided close to the low temperature room and the partition wall 14c is provided. When the set temperature band is close to the above, the radiator 52 is provided substantially at the center of the width of the partition wall 14b.

With such a configuration, the hot gas from the compressor 51 radiates heat by circulating through the radiator 52 and is squeezed by the decompression device 53 to be squeezed by the first evaporator 55a and the second evaporator 55b.
Supplied to

The first evaporator 55a has a first fan 56a
Since the air from the vegetable room 19 is blown through the intake duct (not shown) by (56), the first evaporator 5
The refrigerant circulating in 5a exchanges heat with this air, evaporates, and returns to the compressor 51.

On the other hand, the air from the vegetable compartment 19 is cooled by exchanging heat with the refrigerant, and is blown out from the upper portion of the refrigerator compartment 18 to the refrigerator compartment 18 through the blowing duct 35. Since the refrigerator compartment 18 communicates with the vegetable compartment 19 via the communication hole 15 provided in the partition wall 14, the refrigerator compartment 18 and the vegetable compartment 19 are cooled. In addition, the baffle plate member 62 is provided so that cold air does not directly hit.

The second evaporator 55b has a second fan 5
6b (56), the air from the freezing room 22 is blown through the intake duct 36, so that the second evaporator 55
The refrigerant circulating in b exchanges heat with this air, evaporates and returns to the compressor 51.

On the other hand, the air in the freezing room 22 is cooled by exchanging heat with the refrigerant, and is blown out from the upper part of the ice room 20 into the ice room 20 through the blow duct 37. The ice room 20 includes a freezing room 22 and a partition wall 14.
, The ice room 20 and the freezing room 22 are cooled.

The radiator 52 is laid in a single layer as shown in FIG. 5 so as to heat the opening edge 31. Of course, there is a case where all the openings 30 cannot be laid in a single layer in this way. For example, the area A and the area B in FIG. 5 correspond to this. Such a case will be described later.

By laying the radiator 52 at the opening edge 31 in a single layer, it is possible to minimize the influence on the inside of the refrigerator while preventing dew condensation, thereby improving the cooling effect.

In particular, it is preferable to fix the radiator 52 with an aluminum tape having high heat conductivity so that the heat of the radiator 52 is transmitted to the opening edge 31 widely.

As described above, as in the case where the partition wall 14 separates the ice room 20 and the refrigerator compartment 18 from each other,
The radiator 52 is provided close to the low-temperature side when partitioning a room in which the set temperature band is largely deviated, and the partition wall is used when partitions such as the refrigerator compartment 18 and the vegetable compartment 19 having substantially the same set temperature band are provided. It is provided approximately in the middle of the fourteenth embodiment.

As a result, it is possible to minimize the influence of heat on each room while preventing dew condensation, thereby improving the cooling efficiency.

By the way, as described above, it is difficult to lay the radiator 52 on all the opening edges 31 in a single layer.
A part (area A) that becomes a double pipe and a part (area B) where the radiator 52 is not piped occur.

As shown in FIG. 8, in the area A which becomes a double tube, the inside of the radiator 52 is covered with a low heat conductive member 60 such as a paper tape or a resin tape, and is fixed to the radiator 52 by heat conduction. So that you can press

In the area B where the radiator 52 is not provided, the radiator 52 provided on the side surface of the housing may be bypassed to the portion as shown in FIGS. As shown in FIGS. 9A and 9B, a heat transfer member 61 (61a, 61b) in thermal contact with a radiator 52 laid in close proximity is provided to dissipate heat. The heat radiated by the vessel 52 may be conducted to the area B for heating.

As such a heat transfer member 61, it is possible to connect with a metal member 61a having a high heat conductivity such as a copper plate or an aluminum plate, or to insert a heat conductive putty 61b embedded therein. .

When the metal member 61a is used, thermal contact can be made by brazing or the like, and the metal member 61a may be caulked or pressed to the radiator 52.

On the other hand, as shown in FIG. 9 (c), it is possible to lay the heat radiator 52 only in this area twice.
As shown in FIG. 9D, an electric heater 54 can be separately provided.

In the case where the radiator 52 is laid twice, as described above, the heat radiator 52 may be covered with a low thermal conductive member 60 such as a paper tape or a resin tape and fixed so as to suppress heat conduction into the refrigerator. preferable.

In the refrigerating circuit used in the refrigerator described above, R-22 refrigerant, HFC refrigerant, or the like is used. However, carbon dioxide, which is a natural refrigerant that has recently attracted attention as an environmentally friendly refrigerant, is used. You may do it.

When this carbon dioxide is used, the operating pressure becomes high. Therefore, as shown in FIG.
1a and the latter-stage compression element 51b, between which an intercooler 57 is provided to cool the refrigerant discharged from the former-stage compression element 51a, and the refrigerant is compressed by the latter-stage compression element 51b.

Since the heat of the refrigerant cooled by the intercooler 57 is discarded, it is possible to heat the region (region B) of the opening 30 where the radiator 52 is not provided with the heat. is there.

The configuration of the installation positions of the refrigerating compartment 18 and the freezing compartment 22 shown in FIGS. 1 and 2 and the like are merely examples, and the effects of the present invention can be obtained even with the configuration as shown in FIG. It goes without saying that things can be done.

[0056]

As described above, according to the present invention, the tubular radiator is laid and piped inside the edge of the opening where the lid and the door come into contact, and at that time, the radiator connects the opening. Since it is laid in a single stroke so as to surround a single layer, it is possible to increase the cooling efficiency by preventing dew condensation at the opening and not affecting the temperature in the refrigerator.

When carbon dioxide is used as the refrigerant, an intercooler is provided and the opening is heated by waste heat from the intercooler, so that the cooling efficiency is improved.

When the partition walls separate the rooms having different temperature bands, the radiator laid on the partition walls is laid so as to be close to the room in the low temperature band. The cooling efficiency can be increased without affecting the internal temperature.

Further, a heat transfer member which is in thermal contact with a radiator laid in close proximity is provided at a portion of the edge of the opening where the radiator is not laid, so that the radiator is provided at the portion. Can be conducted by conducting the heat, and the cooling efficiency can be improved by preventing the dew condensation at the opening and not affecting the inside temperature.

An electric heater or the like for heating the radiator is provided at a portion of the edge of the opening where the radiator is not laid, or an adjacent radiator is extended to the portion and laid. Since the radiator laid on the side is bypassed to the portion, the cooling efficiency can be increased by preventing the dew condensation at the opening and not affecting the temperature in the refrigerator. .

Further, since the heat radiator or the heat transfer member is fixed and laid inside the edge of the opening with a member having high heat conductivity such as aluminum tape, the heat transfer range is widened and the heat transfer member is quickly laid. Heat can be transferred, and the cooling efficiency can be increased by preventing dew condensation at the opening while preventing the inside temperature from being affected.

Further, in a place where the radiator is laid twice, the radiator is fixed by a low heat conductive member such as a paper tape or a resin tape, and in this case, the low heat conductive member is placed inside the storage. Since it is laid in such a manner, it is possible to increase the cooling efficiency without affecting the temperature in the refrigerator while preventing the dew condensation at the opening.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refrigerator applied to the description of an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a refrigeration circuit diagram used for a refrigerator.

FIG. 4 is a refrigeration circuit diagram shown three-dimensionally.

FIG. 5 is a diagram showing a method of laying a radiator provided in an opening.

FIG. 6 is a partial cross-sectional view of a partition wall separating a vegetable room and an ice room.

FIG. 7 is a partial cross-sectional view of a partition wall that separates an ice room and a freezing room.

FIG. 8 is a diagram showing a structure when radiators are laid twice.

FIG. 9 is an explanatory diagram in a case where dew condensation is prevented in a portion where a radiator is not laid in a single layer.

FIG. 10 is a refrigerant circuit diagram when carbon dioxide is used as a refrigerant.

FIG. 11 is a view showing a method of laying a radiator provided at an opening in a refrigerator having different installation positions such as a vegetable room.

FIG. 12 is a perspective view of a refrigerator excluding a door and the like applied to the description of the conventional technique.

FIG. 13 is a sectional view of a partition applied to the description of the conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Refrigerator 11 Outer box 13 Foam insulation material 14 (14a, 14b, 14c) Partition wall 18 Refrigerator room 19 Vegetable room 20 Ice room 21 Select room 22 Freezer room 25 Door 26 Lid 30 Opening 31 Opening edge 51b Post compression element 51a Pre-stage compression element 51 Compressor 52 Radiator 53 Decompression device 55 (55a, 55b) Evaporator 57 Intercooler 60 Low heat conductive member 61 (61a, 61b) Heat transfer member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 1/10 F25B 1/10 P F25D 11/00 101 F25D 11/00 101A 19/00 510 19/00 510C 530 530A 23/00 305 23/00 305D (72) Inventor Hitoshi Aoki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hiroki Kakinuma Keihanmoto, Moriguchi-shi, Osaka 2-5-5, Sanyo Electric Co., Ltd. (72) Inventor Masaya Matsuoka 2-5-5, Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L045 AA01 AA06 BA01 CA02 DA02 EA01 GA07 HA02 HA07 JA00 PA04 PA05

Claims (9)

[Claims] 1. A compressor for compressing a refrigerant, an elongated tubular radiator for radiating and condensing the refrigerant, a decompression device for depressurizing the refrigerant, and an evaporator for evaporating the refrigerant to generate cold heat. With the refrigeration circuit, the inside of the housing is divided into a plurality of rooms by a partition wall, and a lid or a door abuts on the opening of each room to close the room, and the cold generated by the refrigeration circuit In a refrigerator that cools each room, the tubular radiator is laid and piped inside an edge of an opening where the lid and the door abut, and at that time, the radiator makes the opening single. A refrigerator characterized by being laid in one brush around it. 2. A method in which carbon dioxide is used as the refrigerant, the compressor is formed by a first-stage compression element and a second-stage compression element, and the refrigerant from the first-stage compression element is cooled and supplied to the second-stage compression element. The refrigerator according to claim 1, wherein an intermediate cooler is provided to compress the refrigerant in two stages and supply the compressed refrigerant to the radiator. 3. When the partition wall partitions a room having a different temperature band, the radiator laid on the partition wall is laid close to a room in a low temperature band. Or the refrigerator according to 2. 4. A heat transfer member, which is in thermal contact with the radiator laid in close proximity, is disposed at a portion of the edge of the opening where the radiator is not laid, and The refrigerator according to any one of claims 1 to 3, wherein the heat of the radiator is conducted by conducting heat. 5. The refrigerator according to claim 4, wherein the heat transfer member is at least one of copper, aluminum, and a heat conductive putty. 6. An electric heater or an intercooler for heating the portion at the edge of the opening where the radiator is not laid, or extending the adjacent radiator to the portion. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator is installed and laid. 7. The radiator is also laid on a side surface of the housing, and the radiator is extended to a portion where the radiator is not laid at an edge of the opening, so as to heat the portion. 7. The refrigerator according to claim 6, wherein when laying, the radiator laid on the side is bypassed to the portion. 8. When the radiator or the heat transfer member is laid and fixed inside the edge of the opening, the heat transfer range is widened and heat transfer such as aluminum tape is performed so that heat transfer can be performed quickly. The refrigerator according to any one of claims 4 to 7, wherein the refrigerator is fixed by a member having high conductivity. 9. In a place where the radiator is laid twice, the radiator is fixed with a low heat conductive member such as a paper tape or a resin tape, and in this case, the low heat conductive member is placed inside the refrigerator. The refrigerator according to any one of claims 1 to 8, wherein the refrigerator is laid.