JP2019020004A - refrigerator - Google Patents

Abstract

To provide a refrigerator that reduces a heat exchange amount per dew condensation suppression pipe to prevent temperature drop between an inlet and an outlet of the dew condensation suppression pipe, thereby suppressing dew condensation.SOLUTION: A refrigerator is provided with a refrigerant distributor upstream of a dew condensation suppression pipe, where the dew condensation suppression pipe is configured to be split into a plurality of pipes.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a refrigerator, and more particularly, to a refrigerator provided with a dew condensation suppression pipe that suppresses condensation of moisture on a partition wall of a storage room.

  In recent refrigerators, a refrigerator compartment is placed in the upper part of the box constituting the refrigerator, a freezer compartment in the middle part, and a vegetable room in the lower part. It is partitioned. In other words, the refrigerator compartment and vegetable compartment adjacent to the freezer compartment are partitioned by a heat insulating partition wall with vacuum insulation and polyurethane foam so that the cold heat of the freezer compartment does not flow into the refrigerator compartment or vegetable compartment adjacent to the freezer compartment. Has been.

  And in a cold-cooled refrigerator (a refrigerator in which cold air cooled by a cooler is blown out to a freezer room, a refrigerator room, or a vegetable room by a blower fan) that is generally mainstream as a refrigerator, cold air is generated inside the refrigerator. A refrigeration cycle is provided, and cool air generated by a cooler of the refrigeration cycle is circulated to each storage chamber by a blower to cool the stored items.

  By the way, the storage chamber door that opens and closes the front opening of the storage chamber is provided with a packing, and the front side of the heat insulating partition wall and the packing are brought into close contact with each other to prevent the cool air in the storage chamber from leaking to the outside. The heat insulating partition wall is provided with a heat insulating material such as polystyrene foam or polyurethane foam inside the synthetic resin casing that forms the heat insulating partition wall, and the heat insulating partition wall is formed on the front side of the heat insulating material. A front plate is provided. The front plate is made of an iron plate so as to be in close magnetic contact with the packing provided on the storage door. The packing of the storage room door is provided with a magnet so as to be in close contact with a front plate made of an iron plate. Generally, a rubber magnet is used for this magnet and is built in the packing.

  And when the front plate is in close contact with the packing, it becomes a partition wall that divides the inside and outside of the storage chamber, so that the temperature of the cold air inside the storage chamber is transmitted to the front plate, and the temperature of the front plate is lowered by lowering the temperature of the front plate Condensation is likely to occur on the surface. For this reason, dew condensation on the front plate is suppressed by installing a dew condensation suppression pipe in which a high-temperature refrigerant flows between the front plate and the heat insulating material to increase the temperature of the front plate. A refrigerator provided with such a dew condensation suppression pipe is as described in, for example, Japanese Patent Application Laid-Open No. 08-189553 (Patent Document 1), Japanese Patent Application Laid-Open No. 2012-17920 (Patent Document 2), and the like.

Japanese Patent Laid-Open No. 8-189533 JP 2012-17920 A

  By the way, the dew condensation suppression pipe extends while meandering the heat insulating partition walls located between the storage chambers, and releases heat to the heat insulating partition walls in the process of passing high temperature refrigerant through the dew condensation suppressing pipe. However, it is returned to the suction side of the compressor through the cooler. And the high temperature refrigerant | coolant which passes this dew condensation suppression pipe flows in in a gaseous-phase state or a gas-liquid two-phase state, and changes to the state where the ratio of a liquid phase increases, releasing heat | fever.

  However, if the ratio of the liquid phase state increases, the temperature of the refrigerant becomes low, and it becomes difficult for the dew condensation suppression pipe to sufficiently apply heat to the heat insulating partition wall, and condensation occurs on the front plate of the heat insulating partition wall. It becomes like this.

  In addition, as a factor in which such a phenomenon is likely to occur, the dew condensation suppression pipe extending while meandering the heat insulating partition wall located between the storage chambers is composed of one long pipe. It is mentioned that the amount of heat exchange of the suppression pipe is large. Since the condensation control pipe releases heat to the heat insulating partition between the storage rooms, if the amount of heat exchange from the inlet to the outlet of the condensation control pipe is large, the temperature of the refrigerant tends to decrease near the outlet. This leads to the formation of condensation.

  In order to solve the above problems, the refrigerator of the present invention is configured by providing a refrigerant distributor on the upstream side of the condensation suppression pipe and dividing the condensation suppression pipe into a plurality of pipes.

  According to the present invention, by distributing the refrigerant flowing through the dew condensation suppression pipe into a plurality of refrigerant distributors, the heat exchange amount of the dew condensation suppression pipe per one can be reduced, and the refrigerant temperature from the inlet to the outlet is reduced. Can be prevented. That is, the occurrence of condensation can be further suppressed.

It is a front external view of the refrigerator to which the present invention is applied. It is a longitudinal cross-sectional view which shows the longitudinal cross-section of the refrigerator shown in FIG. It is explanatory drawing explaining arrangement | positioning of the condensation pipe and dew condensation suppression pipe of a refrigerator. It is explanatory drawing which shows the temperature change of the refrigerant | coolant which flows through a dew condensation suppression pipe. It is the schematic of a refrigerant distributor. It is the schematic of a junction part. It is the schematic which shows the structure of the refrigerating cycle of the refrigerator in Example 1. FIG. It is the schematic which shows the structure of the refrigerating cycle of the refrigerator in Example 2. FIG. It is explanatory drawing which showed typically the state of the refrigerant | coolant in a condensing pipe.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

[First Embodiment]
Before describing specific embodiments of the present invention, the configuration of a refrigerator to which the present invention is applied will be described with reference to FIGS. 1 and 2. FIG. 1 is a front external view of the refrigerator, and FIG. 2 is a cross-sectional view showing a longitudinal cross section of FIG. In FIG. 2, the cross section of the ice making chamber is not shown.

  1 and 2, the refrigerator 1 includes a refrigerator room 2, an ice making room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 from above. Here, the ice making chamber 3 and the upper freezer compartment 4 are provided side by side between the refrigerator compartment 2 and the lower freezer compartment 5. The upper freezer compartment 4 has a smaller volume than the lower freezer compartment 5, and a small amount of food is frozen and stored. As an example, the temperature of each storage room is a storage room having a refrigeration temperature range of about + 3 ° C. for the refrigeration room 2 and about + 3 ° C. to + 7 ° C. for the vegetable room 6. Further, the ice making room 3, the upper freezing room 4, and the lower freezing room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  The refrigerating room 2 is provided with front door type (so-called French type) refrigerating room doors (storage room doors) 2a and 2b which are divided into left and right sides. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each provided with a drawer type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a.

  In addition, a packing (not shown) with magnets built in along the outer edge of each door is provided on the surface of each door facing the front opening of the storage chamber. It is set as the structure which closely_contact | adheres to the flange of the refrigerator outer box formed in above, and the below-mentioned front plate, and suppresses the penetration | invasion of the external air into a storage chamber, and the leakage of the cold air from a storage chamber.

  Here, as shown in FIG. 2, a machine room 9 is formed in the lower part of the refrigerator body 8, and a compressor 10 is built therein. The cooler storage chamber 11 and the machine chamber 10 are communicated with each other by a drain passage 12 so that defrost water from the cooler 26 can be discharged.

  As shown in FIG. 2, the outside and the inside of the refrigerator body 8 are separated by a heat insulating box 13 formed by filling a foam heat insulating material (foamed polyurethane) between the inner box and the outer box. Yes. The heat insulating box 13 of the refrigerator main body 8 has a plurality of vacuum heat insulating materials 14 mounted thereon. The refrigerator body 8 is divided into a refrigerator compartment 2, an upper freezer compartment 4, and an ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2) by an upper heat insulating partition wall 15, and lower heat insulation. The lower freezer compartment 5 and the vegetable compartment 6 are partitioned by the partition wall 16.

  A decompression storage chamber 17 is formed on the upper end of the upper heat insulating partition wall 15 at the lowermost end of the refrigerator compartment 2, and returns to atmospheric pressure when the decompression storage chamber door is pulled out to take out food in the decompression storage chamber 17. When the decompression storage chamber door is returned to its original position, the vacuum pump is activated to decompress the decompression storage chamber 17. In addition, a horizontal partition 39 is provided in the upper part of the lower freezer compartment 5. The horizontal partition 39 partitions the ice making chamber 3 and the upper freezing chamber 4 and the lower freezing chamber 5 in the vertical direction. In addition, a vertical partition that partitions the ice making chamber 3 and the upper freezing chamber 4 in the left-right direction is provided above the horizontal partition 39.

  The horizontal partition 39 is in contact with a packing (not shown) provided on the storage room side surface of the lower freezer compartment door 5a together with the front surface of the lower heat insulating partition wall 16 and the front surfaces of the left and right side walls. Packing (not shown) provided on the storage room side surfaces of the ice making room door 3a and the upper freezing room door 4a includes a horizontal partition 39, a vertical partition, an upper heat insulating partition wall 15, and front left and right side walls of the refrigerator body 8. In contact with each other, movement of cold air between each storage room and each door is suppressed.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are attached with doors 4a, 5a, 6a provided in front of the respective storage compartments. Further, an upper frozen storage container 18 is accommodated and disposed in the upper freezer compartment 4, and an upper frozen storage container 19 and a lower frozen storage container 20 are accommodated and disposed in the lower freezer compartment 5. Furthermore, an upper vegetable storage container 21 and a lower vegetable storage container 22 are stored and arranged in the vegetable compartment 6.

  Then, the ice making room door 3a, the upper freezing room door 4a, the lower freezing room door 5a, and the vegetable room door 6a are each put on a handle portion (not shown) and pulled out to the front side, thereby making an ice making storage container 3b (not shown). ), The upper frozen storage container 18, the lower frozen storage container 20, and the lower vegetable storage container 22 can be pulled out.

  More specifically, the lower-stage refrigerated storage container 20 has a support arm attached to the inner wall of the freezer compartment door, and a flange on the upper side of the lower-stage refrigerated storage container 20 is suspended. Only is withdrawn. The upper frozen storage container 19 is placed on an uneven portion (not shown) formed on the side wall of the freezer compartment 5 and is slidable in the front-rear direction.

  Similarly, the lower vegetable storage container 22 has a flange portion suspended on a support arm attached to the inner wall of the vegetable compartment door 6a, and the upper vegetable storage container 21 is placed on the uneven portion of the side wall of the vegetable compartment. The vegetable compartment 6 is provided with an electric heater 6c fixed to the heat insulating box 13, and the electric heater 6c has a temperature suitable for storing vegetables so that the vegetable compartment 6 is not overcooled. I am doing so. The electric heater 6c may be provided as necessary, but in the present embodiment, the electric heater 6c is provided so that vegetables can be stored in a more suitable atmosphere.

  Next, a method for cooling the refrigerator will be described. A refrigerator housing chamber 11 is formed in the refrigerator main body 1, and a cooler 26 is provided therein as a cooling means. The cooler 26 (for example, a fin tube heat exchanger) is provided in the cooler storage chamber 11 provided at the back of the lower freezer compartment 5. A blower fan 27 (a propeller fan as an example) is provided as a blower unit in the cooler storage chamber 11 and above the cooler 26.

  Air cooled by heat exchange in the cooler 26 (hereinafter, low-temperature air heat-exchanged in the cooler 26 is referred to as “cold air”) is supplied by a blower fan 27 to a refrigerator compartment air duct 28, a freezer compartment air duct 29, And it sends to each storage room of the refrigerating room 2, the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 via the ice making room air duct which is not illustrated.

  The ventilation to each storage room is performed by a refrigerating room damper 30 that controls the amount of air sent to the refrigerating room 2 in the refrigerating temperature zone, and a freezing room damper 31 that controls the amount of air sent to the freezing rooms 4 and 5 in the refrigerating temperature zone. Be controlled. Incidentally, the air ducts to the refrigerator compartment 2, the ice making compartment 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are provided on the back side of each storage compartment of the refrigerator body 8. Specifically, when the refrigerator compartment damper 30 is in the open state and the freezer compartment damper 31 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 32 provided in multiple stages via the refrigerator compartment air duct 28.

  The cold air that has cooled the refrigerator compartment 2 is provided on the lower right rear side of the lower heat insulating partition wall 16 through the refrigerator compartment-vegetable compartment communication duct from the refrigerator compartment return port provided in the lower part of the refrigerator compartment 2. The air is blown from the vegetable room outlet to the vegetable room 6. The return cold air from the vegetable compartment 6 passes through the vegetable compartment return duct 33 from the vegetable compartment return duct entrance provided in front of the lower part of the lower heat insulating partition wall 16 and from the vegetable compartment return duct outlet to the lower part of the cooler storage compartment 11. Return to.

  As shown in FIG. 2, a partition member 34 that partitions each storage chamber and the cooler storage chamber 11 is provided in front of the cooler storage chamber 11. The partition member 34 is formed with a pair of upper and lower outlets, and when the freezer damper 31 is in an open state, the cold air heat-exchanged by the cooler 26 is blown by an air blower fan 27 into an ice making chamber blown out of the figure. The air is blown from the outlet 35 to the ice making chamber 3 and the upper freezer compartment 4 through the duct and the upper freezer compartment air duct. Further, the air is blown from the outlet 36 to the lower freezer compartment 5 through the lower freezer compartment air duct.

  In addition, a control device (not shown) equipped with a CPU, a memory such as a ROM and a RAM, an interface circuit, and the like is provided on the upper surface of the ceiling wall of the refrigerator body 10, and an outside air temperature sensor (not shown), outside air humidity Sensor (not shown), cooler temperature sensor (not shown), refrigerator temperature sensor (not shown), vegetable room temperature sensor (not shown), freezer temperature sensor (not shown), door 2a, The door sensors 2b, 3a, 4a, 5a, and 6a are connected to door sensors (not shown) that detect the open / closed state of the doors, a temperature setter (not shown) provided on the inner wall of the refrigerator compartment 2, and the like.

  And, control of ON / OFF of the compressor 10, control of the respective actuators that individually drive the refrigerator compartment damper 30 and the freezer compartment damper 31, and ON / OFF control of the blower fan 27 by a program preinstalled in the ROM And rotational speed control, alarm ON / OFF control for notifying the door open state, and the like. In addition, the speed control of the machine room cooling fan and the switching control of the capillary tube according to the present embodiment are also performed.

  Returning to FIG. 1, the refrigerator compartment door 2a is provided with an input control unit 36, and this input control unit 37 is connected to the control device described above. Therefore, the temperature of each storage room of the refrigerator 1 can be set by an input from the input control unit 37. For example, the temperature of each storage chamber is controlled by controlling the number of rotations of the compressor 10, the number of rotations of the blower fan 27, the opening / closing amount of the refrigerator compartment damper 30 and the freezer compartment damper 31, and the like.

  Refrigeration room doors 2a and 2b, ice making room door 3a, upper freezing room door 4a, lower freezing room door 5a and vegetable room door 6a are in contact with heat insulating partition walls 15 and 16 and front end of horizontal partition 39. The part is provided with front plates 40a, 40b and 40c each made of an iron plate. A front plate 40 d is also provided in front of the heat insulating partition wall 41 provided on the bottom surface of the refrigerator 1. In the heat insulating box 13, the place where 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 in contact with each other in the closed state is referred to as an opening edge. The plates 40a, 40b, 40c, and 40d are provided at the opening edge.

  When the ice making room door 3a, the upper freezer room door 4a, the lower freezer room door 5a, and the vegetable room door 6a are opened, there is a possibility that dew condensation occurs because the outside air contacts the opening. For this reason, dew condensation suppression pipes through which refrigerant flows are provided in the openings near these doors. By supplying the high-temperature refrigerant to the dew condensation suppression pipe, dew condensation on the opening edge can be suppressed. The condensation suppression pipe is covered with front plates 40a, 40b, and 40c.

  FIG. 3 is a view showing the arrangement of the condensation pipes provided in the refrigerator 1. As the condensation pipe, for example, a pipe through which a refrigerant disposed near the surface of the heat insulating box 13 flows can be adopted. The first condensing pipe 42 is installed in the machine room 9 provided in the lower part on the back side of the refrigerator 1. The first condensing pipe 42 is cooled by a machine room cooling fan (not shown) provided in the machine room 9.

  The second condensation pipe 43 and the third condensation pipe 44 are embedded in the side heat insulating wall of the refrigerator 1. The dew condensation suppressing pipe 45 is disposed on a part or all of the opening edge. The second condensing pipe 43 and the third condensing pipe 44 may be disposed along the top surface or the back surface instead of the side surface of the refrigerator 1. Moreover, although it is preferable to provide all the 1st condensing pipes 42, the 2nd condensing pipes 43, and the 3rd condensing pipes 44, what is necessary is just to provide any one or more.

  Here, the condensation of the refrigerant is performed in the dew condensation suppression pipe, but when the dew condensation suppression pipe is constituted by one, the transition from the gas-liquid two-phase region to the liquid phase region is performed as shown in FIG. Sometimes. In the gas-liquid two-phase region, the refrigerant temperature is constant, but in the liquid-phase region, the refrigerant temperature decreases. This will cause the dew point temperature to drop and condensation to occur.

  Therefore, as shown in FIG. 3, the third condensing pipe is distributed from the third condensing pipe to the three pipes via the refrigerant distributor 101 (FIG. 5). The three pipes are arranged near the vegetable compartment 6 (region A), in the middle of the lower freezer compartment 5 (region B), and near the upper portion of the upper freezer compartment 4 (region C). Is heating up. After that, three pipes are flowed into the junction 102 (FIG. 6) to make one pipe again. At this time, since the refrigerant flow path is divided into three, the heat radiation amount of the refrigerant per one becomes small. Therefore, it is possible to prevent a decrease in temperature due to the heat radiation of the refrigerant from the inlet to the outlet of the condensation suppression pipe and to suppress the condensation.

  Moreover, it is necessary to make the pressure loss per pipe equal. If the pressure loss differs between the three pipes, a large amount of refrigerant flows through the pipe with a small pressure loss, and the dew condensation suppressing effect cannot be obtained. For equal pressure loss, the length and diameter of each pipe are the same, or if the length cannot be the same due to structural restrictions, the pipe diameter of the pipe with a longer pipe length is used. For example, the diameter of a short pipe can be reduced.

  FIG. 5 is a schematic view of the refrigerant distributor as viewed from the front and side. The refrigerant distributor has one inflow portion and three outflow portions. FIG. 6 shows the junction. Contrary to the refrigerant distributor, it has a structure having three inflow portions and one outflow portion, which is a so-called header type. In addition, the shape of the refrigerant distributor and the merging portion and the number of distribution are not limited to those shown in the figure, and may be any shape. (For example, the shape of the confluence portion is the same as that of the refrigerant distributor.) In addition, the refrigerant distributor and the confluence portion are installed in the machine room 9 in which a compressor and a cooling fan are installed in consideration of workability of pipe welding. It is desirable to be installed in

  FIG. 7 shows a schematic cycle diagram of the refrigerator. A four-way valve 54 is attached to the refrigerator, and the refrigerant discharged from the compressor 10 exchanges heat with the outside air in the first condensing pipe 42, and then the second condensing pipe 43 and the third condensing pipe. It passes through the pipe 44 and flows into the four-way valve inlet 50. The refrigerant flowing out from the four-way valve outlet 55 is then distributed to three pipes by the distributor 101, and the refrigerant flows through the opening edge of the refrigerator as the dew condensation suppression pipe 45. Thereafter, the refrigerants merge at the junction 102 to form one pipe and flow into the four-way valve inlet 57. Thereafter, after passing through the dryer 60, the refrigerant is made low-pressure and low-temperature by the capillary tube 61, heat is exchanged with the air in the cabinet by the evaporator 63, and cold air is supplied into the cabinet. Thereafter, the refrigerant flows into the compressor 10.

  By setting it as such a cycle structure, the refrigerant | coolant temperature fall of a dew condensation suppression pipe can be suppressed, and the dew condensation of a refrigerator opening edge can be suppressed.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIG. Since the basic configuration of the refrigerator is the same as that of the first embodiment, it is omitted. The second embodiment is characterized in that the refrigerant distributor 101 is disposed between the compressor 10 and the first condensing pipe 42.

  FIG. 9 shows a schematic diagram of the state of the refrigerant after being discharged from the compressor. The state of the refrigerant discharged from the compressor 10 is a gas phase, but becomes a gas-liquid two-phase in the process of passing through the first condensing pipe 42, the second condensing pipe 43, and the third condensing pipe 44. In this gas-liquid two-phase state, the gas phase and the liquid phase are mixed, but the flow pattern varies depending on the customer's usage and environmental conditions. When refrigerant distribution is performed, it is necessary to distribute gas and liquid evenly. However, in a refrigerator whose flow pattern changes variously, it is very difficult to distribute refrigerant in two phases.

  Therefore, as shown in FIG. 8, by disposing the refrigerant distributor 101 between the compressor 10 and the first condensing pipe 42, that is, in the portion where the refrigerant is in the gas phase, the refrigerant distributor 101 can be equally distributed regardless of the flow mode. Refrigerant distribution can be performed. By setting it as such a cycle structure, the refrigerant | coolant temperature fall of a dew condensation suppression pipe can be suppressed, and the dew condensation of a refrigerator opening edge can be suppressed.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.

  2 ... Refrigeration room, 2a, 2b ... Refrigeration room door, 3 ... Ice making room, 3a ... Ice making room door, 4 ... Upper freezing room, 4a ... Upper part freezing room door, 5 ... Lower freezing room, 5a ... Lower part freezing room Door, 6 ... Vegetable room, 6a ... Vegetable room door, 11 ... Compressor, 15 ... Upper heat insulating partition wall, 16 ... Lower heat insulating partition, 40a, 40b, 40c ... Front plate, 42 ... First condensation Pipe ... 43 ... 2nd condensing pipe, 44 ... 3rd condensing pipe, 45 ... condensation suppression pipe, 101 ... refrigerant distributor, 102 ... refrigerant junction

Claims (4)

A compressor disposed in the machine room of the heat insulation box, a first condensation pipe provided in the machine room through which refrigerant from the compressor flows, and a refrigerant provided in the machine room and flowing through the first condensation pipe A cooling fan for cooling the at least second condensing pipe connected to the first condensing pipe and provided at one or more of the side, top and back of the heat insulating box, and the heat insulating box. A heat insulating partition wall partitioning the storage chamber, a dew condensation suppression pipe provided inside the heat insulating partition wall and connected to the second condensing pipe, and connected to the dew condensation suppression pipe and arranged downstream of the dew condensation suppression pipe A refrigerator having a reduced pressure part,
A refrigerant distributor for distributing the refrigerant is arranged upstream of the dew condensation suppression pipe, the dew condensation suppression pipe is composed of a plurality of pipes, and a merging portion for joining the plurality of pipes downstream of the dew condensation suppression pipe is provided. A refrigerator characterized by having. The refrigerator according to claim 1,
A refrigerator comprising a plurality of dew condensation suppression pipes arranged so that pressure loss of refrigerant flowing through each pipe is equal. The refrigerator according to claim 1,
The refrigerator is characterized in that the refrigerant distributor is disposed before the refrigerant condensing process starts, that is, where the refrigerant is in a gas phase portion. The refrigerator according to claim 1,
The refrigerator is characterized in that the refrigerant distributor is disposed in a machine room in which the compressor and a cooling fan are installed.

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