JP2020094756A - refrigerator - Google Patents

Abstract

To hold predetermined cooling capacity even when a cycle of a defrosting operation is extended, and to suppress power consumed by the defrosting operation.SOLUTION: A refrigerator includes a heat exchanger for cooling the cool air in an internal space. The heat exchanger includes: a plurality of fins arranged separated from one another; a refrigeration pipe provided so as to penetrate the plurality of fins; a pair of first end surface parts formed by outer edges of the plurality of fins and opposing to each other; and a pair of second end surface parts formed so as to cross both first end surface parts by the outer edges of the plurality of fins, and opposing to each other. The heat exchanger has a plurality of heat exchange regions which are arranged so that cool air passes from one first end surface part side to the other first end surface part, and which are arranged side by side along the opposing direction of both second end surface parts. Each heat exchange region includes the refrigeration pipe separately, and a refrigerant flowing in the refrigerant pipe of at least one heat exchange region out of the plurality of heat exchange regions becomes lower in temperature than the refrigerant flowing in the refrigerant pipe of other heat exchange regions.SELECTED DRAWING: Figure 3

Description

The present invention relates to a refrigerator.

As a conventional refrigerator, for example, in Patent Document 1, an air passage that takes in cool air from a storage chamber in which an object to be cooled is stored and then returns to the storage chamber, and heat exchange that cools the cool air taken in the air passage. And a structure including a container are disclosed.

In the refrigerator disclosed in Patent Document 1, when the cooling operation is continued, steam contained in the cool air flowing in the ventilation passage frosts on the heat exchanger, so that the defrosting operation needs to be performed.

By the way, in the refrigerator disclosed in Patent Document 1, frost is formed on the entire heat exchanger during the cooling operation. For this reason, when the cooling operation is continued to some extent, the plurality of fins forming the heat exchanger are clogged with frost, and the amount of cold air passing through the heat exchanger is reduced, so that the cooling capacity is significantly reduced. Therefore, it is necessary to perform the defrosting operation in a relatively short cycle, and as a result, there is a problem that the power consumed by the defrosting operation increases.

JP-A-8-86554

Then, this invention makes it a main subject to obtain the refrigerator which can hold|maintain a predetermined cooling capacity and can suppress the electric power consumed by a defrosting operation, even if it makes a cycle of a defrosting operation comparatively long. ..

That is, the refrigerator according to the present invention is a refrigerator that is installed in an internal space and includes a heat exchanger that cools the cold air in the internal space, and the heat exchangers are arranged in a plurality apart from each other. Of the fins, a refrigerant pipe provided so as to penetrate through the plurality of fins, through which a refrigerant flows, a pair of first end surface portions formed by the outer edges of the plurality of fins, and the plurality of fins. A pair of second end surface portions that are formed so as to intersect with both the first end surface portions by the outer edge of the heat exchanger, and the heat exchanger includes one of the first end surface portions and the other of the first end surface portions. And a plurality of heat exchange regions arranged in parallel along the facing direction of the second end face portions, the heat exchange regions being different from each other. Of the plurality of heat exchange areas, the refrigerant flowing through the refrigerant tubes of at least one of the heat exchange areas has a lower temperature than the refrigerant flowing through the refrigerant tubes of the other heat exchange areas. It is characterized by being.

With such a configuration, among the plurality of heat exchange areas of the heat exchanger, the refrigerant flowing through the refrigerant tubes of at least one heat exchange area has a lower temperature than the refrigerant flowing through the refrigerant tubes of the other heat exchange areas. Therefore, the frost formed on the heat exchanger can be concentrated in the one heat exchange area. As a result, frost is less likely to occur in the other heat exchange areas, and clogging of the entire heat exchanger can be delayed. As a result, the predetermined cooling capacity can be maintained even if the cycle of the defrosting operation is relatively long, and the number of times of the defrosting operation can be reduced. As a result, the power consumed by the defrosting operation can be suppressed.

In order to lower the temperature of the refrigerant flowing through the refrigerant pipes of at least one of the heat exchange regions among the plurality of heat exchange regions than the refrigerant flowing through the refrigerant pipes of the other heat exchange regions, for example, each of the refrigerant pipes Further comprising an expansion mechanism connected to the upstream side, the refrigerant flow rate after passing through the expansion mechanism connected to the refrigerant pipe of the one heat exchange area, the expansion connected to the refrigerant pipe of the other heat exchange area It may be set so as to be smaller than the flow rate of the refrigerant after passing through the mechanism.

With such a configuration, the expansion mechanism can easily set the temperature of the refrigerant flowing into the refrigerant pipe in each heat exchange region.

Further, in this case, it may further include a condenser that constitutes a refrigeration cycle, and a distributor that distributes the refrigerant drawn from the condenser to each of the expansion mechanisms.

With such a configuration, since the refrigerant is introduced from one condenser into the refrigerant pipe of each heat exchange region, it is not necessary to provide a plurality of refrigeration cycles side by side, and the refrigeration cycle mechanism can be made compact. Further, since the refrigerant discharged from one condenser is distributed to each heat exchange region, the refrigerant flow rate adjustment in the expansion mechanism becomes relatively easy.

Further, specifically, the air conditioner is further provided in the interior space, and further includes an air passage for introducing cool air in an accommodation chamber in which an object to be cooled is accommodated, and the heat exchanger is disposed in the air passage. Anything that is

Further, in this case, in order to make the temperature of the refrigerant flowing through the refrigerant pipes of at least one heat exchange region among the plurality of heat exchange regions lower than the temperature of the refrigerant flowing through the refrigerant pipes of other heat exchange regions, for example, It may be configured to further include an air volume adjusting structure for adjusting the air volume of the cool air passing through one heat exchange area to be smaller than the air volume of the cool air passing through the other heat exchange area.

In addition, specifically, the air flow rate adjusting structure is formed on the upstream side of the heat exchanger in the ventilation passage, and has an introduction port communicating with the accommodation chamber, and the introduction port is the other one. It may be formed so as to open from a position closer to the one heat exchange region than the heat exchange region toward the facing direction of both the second end face portions.

With such a configuration, the cooling air is supplied from the inlet port to one of the first end surface portions of the heat exchanger in the facing direction of the both end surfaces. This makes it possible to increase the air volume of the cool air passing through the other heat exchange region farther from the inlet than the cool air passing through the one heat exchange region near the inlet.

Further, the air volume adjusting structure is formed downstream of the heat exchanger in the ventilation passage and has a reduced diameter portion that is reduced in diameter so as to face the other first end surface portion of the one heat exchange region. You may comprise.

With such a configuration, more of the cool air introduced from the introduction port is guided to the other heat exchange area, and the air volume of the cool air passing through the other heat exchange area can be increased.

Further, the one heat exchange area and the other heat exchange area may each include a plurality of different fins.

If it is such, it becomes difficult for the temperature of the refrigerant flowing through the refrigerant pipe of one heat exchange area to be transmitted to the plurality of fins of the other heat exchange area via the plurality of fins of the one heat exchange area. .. This can prevent frost formation on other heat exchange regions.

Further, the interval between the plurality of fins in the one heat exchange area may be wider than the interval between the plurality of fins in the other heat exchange area. In this case, specifically, the distance between the plurality of fins in the one heat exchange area may be 1.3 times or more the distance between the plurality of fins in the other heat exchange area.

With such a configuration, one heat exchange area where frost is more likely to occur than other heat exchange areas is less likely to be clogged with frost. Accordingly, the defrosting operation cycle can be extended.

In addition, one of the first heat exchange regions may be arranged so that one of the first end surface portions faces the introduction port.

With such a structure, while maintaining the state in which the cold air introduced from the inlet passes through the other heat exchange region to the downstream side, the water content in the cold air is part of one heat exchange region. Priority will be given to frost formation. As a result, the amount of frost formed on other heat exchange areas can be reduced.

According to the present invention thus configured, a predetermined cooling capacity can be maintained even when the defrosting operation is performed in a relatively long cycle, and as a result, the power consumed by the defrosting operation can be suppressed.

It is sectional drawing which shows the internal structure of the refrigerator which concerns on embodiment typically. It is a rear view which shows the refrigerator which concerns on embodiment typically. It is a partially expanded sectional view which shows typically the location where the heat exchanger of the refrigerator which concerns on embodiment was installed. It is a perspective view which shows typically the heat exchanger of the refrigerator which concerns on embodiment. It is a figure which shows the refrigeration cycle mechanism of the refrigerator which concerns on embodiment. It is a partially expanded sectional view which shows typically the location where the heat exchanger of the refrigerator which concerns on other embodiment was installed.

Below, the refrigerator concerning the present invention is explained based on a drawing.

The refrigerator 100 according to the present invention is mainly used in ordinary households. However, the present invention is not limited to household refrigerators, but can be applied to commercial refrigerators. The refrigerator according to the present invention includes not only a refrigerator and a freezer, but also a refrigerator and a refrigerator.

<Embodiment 1> A refrigerator 100 according to the present embodiment includes a refrigerator main body 10 having an internal space S, and each device for cooling the internal space S, as shown in FIGS. 1, 2, and 5. And a cycle mechanism RC. The refrigeration cycle mechanism RC of this embodiment includes a compressor 20, a condenser 30, and a heat exchanger 40 (evaporator) as each device. The heat exchanger 40 is installed in a frost environment.

The refrigerator main body 10 is a case-like body having a door that opens toward the front (right side in FIG. 1). Further, the refrigerator body 10 is provided with a machine room MS on the back side, and the compressor 20 and the condenser 30 configuring the refrigeration cycle mechanism 20 are installed in the machine room MS. Further, the refrigerator main body 10 is provided with a storage chamber 11 in which an object to be cooled is stored, and an air passage 12 for circulating the cool air in the storage chamber 11 in the internal space S. The accommodation chamber 11 is provided on the front side (front side) of the interior space S, and the ventilation passage 12 is provided on the rear side (back side) of the accommodation space 11 in the interior space S. .. It should be noted that the accommodation chamber 11 of the present embodiment is provided with a plurality of accommodation chambers 11a in a multi-stage form.

The ventilation passage 12 extends in the up-down direction in the interior space S along the back surface of the refrigerator body 10. The ventilation passage 12 has an introduction port 13 that communicates with the storage chamber 11 on the lower side (lowermost side), and also has a plurality of discharge ports 14 that communicate with the storage chamber 11 and the introduction port 13 above. There is. In addition, the introduction port 13 of the present embodiment is provided so as to communicate with the lowermost accommodation chamber 11a. Further, each outlet 14 of the present embodiment is provided so as to communicate with each accommodation chamber 11a.

In addition, a storage section 12a in which the heat exchanger 40 that constitutes the refrigeration cycle RC is installed is formed in the ventilation passage 12, and the blower mechanism 50 is installed downstream of the storage space 12a. .. As a result, the ventilation passage 12 receives the cool air in the accommodation chamber 11 from the inlet 13 and passes it through the heat exchanger 40 by the air blow of the air blowing mechanism 50, and then returns it to the accommodation chamber 11 from each outlet 14. Is becoming The blower mechanism 50 is specifically a blower fan.

As shown in FIGS. 3 and 4, the heat exchanger 40 has a substantially rectangular parallelepiped shape. Specifically, the heat exchanger 40 includes a plurality of fins 41 that are spaced apart from each other, and a refrigerant pipe 42 that is provided so as to penetrate the plurality of fins 41 and through which a refrigerant flows. ..

In addition, the heat exchanger 40 is formed by the outer edges of the plurality of fins 41, and the pair of first end surface portions 43a and 43b facing each other and the outer edges of the plurality of fins 41 intersect both the first end surface portions 43a and 43b. And a pair of second end surface portions 44a and 44b facing each other. In addition, the heat exchanger 40 arrange|positions the 1st 1st end surface part 43a downstream of the inlet 13 with respect to the ventilation path 12, and the 1st other end surface part 43b of the other upstream side of each outlet 14. It has been placed and installed.

And the said heat exchanger 40 is arrange|positioned with respect to the accommodation space 12a in the state which faced the 1st 1st end surface part 43a to the upstream side, and the other 1st end surface part 43b to the downstream side. In addition, the heat exchanger 40 faces one of the second end surface portions 44a toward the inner surface on the introduction port 13 side (front side) with respect to the accommodation space 12a, and the other second end surface portion 44b on the opposite side to the introduction port 13. It is arranged so as to face the inner surface (on the back side). Thereby, in the heat exchanger 40, the cool air flowing through the ventilation passage 12 passes from the one first end surface portion 43a to the other first end surface portion 43b. In other words, in the heat exchanger 40, the one first end surface portion 43a is arranged on the upstream side in the ventilation direction, and the other first end surface portion 43b is arranged on the downstream side in the ventilation direction. Further, the heat exchanger 40 is arranged such that both the second end surface portions 44a and 44b are along the ventilation direction (parallel or substantially parallel to the ventilation direction).

Further, the heat exchanger 40 has a plurality of heat exchange regions 45 arranged in parallel along the facing direction of the second end surface portions 44a and 44b. That is, the plurality of heat exchange regions 45 are arranged in parallel along the direction of the ventilation passage 12 away from the inlet 13.

Each heat exchange area 45 includes a plurality of different fins 41 and a refrigerant pipe 42. That is, in the heat exchanger 40, each heat exchange region 45 is formed by a plurality of heat exchange elements 45 that can be separated from each other, and it can be said that the plurality of heat exchange elements 45 are arranged in parallel.

The plurality of fins 41 forming each heat exchange area 45 are formed of plate-shaped aluminum having a substantially rectangular shape. The longitudinal direction of each fin 41 extends in the opening direction of the inlet 13, and the lateral direction thereof extends in the upstream and downstream directions of the ventilation passage 12. The fins 41 are not limited to the plate-shaped one, and may be U-shaped.

Further, the refrigerant tubes 42 forming the heat exchange regions 45 are formed in a zigzag shape by alternately forming straight pipe portions and curved pipe portions. The bent tube portion is partially exposed from the side surface portion in the heat exchange area 45. The refrigerant tube 42 may be a circular tube, an elliptical tube, a winged tube, or the like.

The heat exchanger 40 of the present embodiment has a first heat exchange region 45a, a second heat exchange region 45b, and a third heat exchange region 45c (hereinafter, these are collectively referred to as each heat exchange region 45). I have it. And the 1st heat exchange area|region 45a, the 2nd heat exchange area|region 45b, and the 3rd heat exchange area|region 45c are arrange|positioned in parallel along the direction away from the inlet 13 in this order.

Further, the ventilation passage 12 has a reduced diameter portion 15 having a smaller inner diameter (width) than the accommodation space 12a on the downstream side of the accommodation space 12a. The reduced diameter portion 15 is provided so as to face the other (downstream side) first end surface portion 43b in the other heat exchange region 45. The reduced diameter portion 15 of the present embodiment is the other first heat exchange area 45 (third heat exchange area 45c) arranged farthest from one heat exchange area 45 (first heat exchange area 45a). It is provided so as to face the end surface portion 43b. The blower mechanism 50 is installed in the reduced diameter portion 15.

Further, in the refrigerator 100 according to the present invention, the air volume of the cool air passing through the first heat exchange area 45a (one heat exchange area 45) is the second heat exchange area 45b and the third heat exchange area 45c (other heat exchange areas). An air volume adjusting structure FC for adjusting the air volume to be smaller than the air volume of the cool air passing through the region 45) is further provided. Specifically, the air volume adjusting structure FC has an inlet 13 and a reduced diameter portion 15.

According to the air flow rate adjusting structure FC, the cool air introduced from the inlet 13 along the one first end surface portion 43a of the heat exchanger 40 has a reduced diameter installed on the downstream side of the third heat exchange region 45c. It passes through the heat exchanger 40 so as to be guided to the section 15. As a result, the air volume of the cool air passing through the first heat exchange area 45a becomes smaller than the air volume of the cool air passing through the second heat exchange area 45b and the third heat exchange area 45c. According to the air volume adjustment structure FC of the present embodiment, the air volume of the cool air passing through the second heat exchange area 45b is smaller than the air volume of the cool air passing through the third heat exchange area 45c. That is, the air volume is smaller in the heat exchange region 45 arranged closer to the inlet 13.

With such a configuration, the air volume of the cool air passing through the first heat exchange area 45a (one heat exchange area 45) is equal to that of the second heat exchange area 45b and the third heat exchange area 45c (the other heat exchange area 45). ), the temperature of the refrigerant flowing through the refrigerant tubes 42 in one heat exchange area 45 becomes lower than the temperature of the refrigerant flowing through the refrigerant tubes 42 in the other heat exchange area 45. .. As a result, one heat exchange region 45 is more likely to be frosted than the other heat exchange regions 45, and the frost formed in the heat exchanger 40 can be concentrated in one heat exchange region 45.

Next, the refrigeration cycle mechanism RC will be described with reference to FIG. In the refrigeration cycle mechanism RC, the compressor 20, the condenser 30, and the heat exchanger 40 are connected so that the refrigerant flows in this order. A distributor 50 is connected between the condenser 30 and the heat exchanger 40, and the distributor 50 causes the refrigerant derived from the condenser 30 to be transferred to the refrigerant pipes 42 of each heat exchange region 45. It is designed to be distributed. Further, the refrigeration cycle mechanism RC exchanges heat between the refrigerant that is derived from the heat exchanger 40 and is introduced into the compressor 20, and the refrigerant that is derived from the condenser 30 and is introduced into the distributor 50. The exchanging unit 70 is provided. Note that, as the distributor 50, specifically, a shunt valve, a branch pipe, or the like may be used.

An expansion mechanism 80 is connected to the upstream side of each of the refrigerant tubes 42 in each heat exchange area 45. In each expansion mechanism 80, the refrigerant flow rate after passing through the expansion mechanism 80 connected to the refrigerant pipe 42 of one heat exchange area 45 (first heat exchange area 45a) is different from that of the other heat exchange area 45 (second heat exchange area 45). The flow rate of the refrigerant after passing through the expansion mechanism 80 connected to the refrigerant pipes 42 of the heat exchange area 45b and the third heat exchange area 45c) is set to be smaller than the flow rate of the refrigerant.

In the present embodiment, the refrigerant flow rate after passing through the expansion mechanism 80 connected to the second heat exchange area 45b is lower than the refrigerant flow rate after passing through the expansion mechanism 80 connected to the third heat exchange area 45c. It is set to be less. That is, the expansion mechanism 80 of this embodiment is set so that the expansion mechanism 80 connected to the heat exchange region 45 closer to the inlet 12 has a smaller refrigerant flow rate after passing through.

The expansion mechanism 80 is a so-called capillary tube. Then, the capillary tubes having the same inner diameter and different lengths are used so that the flow rates of the refrigerant after passage are different. Specifically, the capillary tube connected to the refrigerant pipe 42 of one heat exchange region 45 is longer than the capillary tube connected to the refrigerant pipe 42 of the other heat exchange region 45. The capillary tubes may have the same length and different inner diameters so that the flow rates of the refrigerant after passage may be different. Further, the expansion mechanism 80 is not limited to the capillary tube, and an expansion valve can be used. When an expansion valve is used as the expansion mechanism 80, the flow rate of the refrigerant after passing may be set to be different by adjusting the valve opening degree of each expansion valve.

With such a configuration, the refrigerant flow rate after passing through the expansion mechanism 80 corresponding to one heat exchange area 45 (first heat exchange area 45a) is different from that of the other heat exchange area 45 (second heat exchange area 45b and Since it is set to be smaller than the refrigerant flow rate after passing through the expansion mechanism 80 corresponding to the third heat exchange region 45c), when the cool air passes through the heat exchanger 40, the one heat exchange region 45 is provided. Frost is concentrated. As a result, the frost formation on the other heat exchange area 45 is delayed, and the cycle in which frost formation occurs on the entire heat exchanger 40 becomes longer.

Further, in the ventilation passage 12, as shown in FIG. 3, a heater 60 is installed upstream of the heat exchanger 40. The heaters 60 are installed so as to correspond to the respective heat exchange areas 45, and can be heated separately. The heater 60 is for heating the cold air introduced from the inlet 12 during the defrosting operation before introducing it to the heat exchanger 40.

<Other Embodiments> As another embodiment, as shown in FIG. 6, one first end surface portion 43a in one heat exchange area 45 (first heat exchange area 45a) constituting the heat exchanger 40. The side may be arranged so as to face the inlet 13. In addition, the one first end face portion 43a side in one heat exchange region 45 of the present embodiment is one first end face of the other heat exchange region 45 (the second heat exchange region 45b and the third heat exchange region 45c). It projects further upstream than the part 43a, and one second end face part 44a of this projecting part faces the inlet 13. That is, one heat exchange region 45 has one first end surface portion 43 a side projecting so as to face a part of the opening of the inlet 13. In other words, one heat exchange region 45 has one first end surface portion 43a side protruding so as not to block the entire opening of the inlet 13.

Further, as another embodiment, an interval between the plurality of fins 41 configuring the one heat exchange area 45 is set to be larger than an interval between the plurality of fins 41 configuring the other heat exchange area 45. Good. Specifically, the former interval may be 1.3 times the latter interval.

Further, as the air volume adjusting structure, a ventilation resistance member that suppresses the inflow of cold air into the one heat exchange region 45 may be installed in the ventilation passage 12.

Further, in the above-described embodiment, the plurality of fins forming each heat exchange area 45 are different from each other, but the same one may be used as the plurality of fins 41 forming each heat exchange area 45.

That is, the heat exchanger 40 of the above-described embodiment has a structure in which heat exchange elements that can be separated for each heat exchange region 45 are combined, but the present invention is not limited to this, and the heat exchanger 40 has each heat exchange region 45. It may have a structure that cannot be separated. For example, in the heat exchanger 40 of the embodiment, one first end surface portion 43a is arranged on the upstream side with respect to the ventilation direction, and the other first end surface portion 43b is arranged on the downstream side with respect to the ventilation direction. However, one second end surface portion 44a may be arranged on the upstream side in the ventilation direction and the other second end surface portion 44b may be arranged on the downstream side in the ventilation direction. In this case, both first end surface portions 43a and 43b are arranged along the ventilation direction. In addition, in such an aspect, since the refrigerant pipe 42 is installed so as to straddle each heat exchange region 45, the heat exchanger 40 has a structure that cannot be separated for each heat exchange region 45.

When the refrigerant pipe 42 is installed so as to straddle each heat exchange region 45 like the heat exchanger 40 of the above-described aspect, the refrigerant pipe of each heat exchange region 45 is utilized by using the air volume adjustment structure FC. The temperature of the refrigerant flowing through 42 may be adjusted. When the refrigerant pipe 42 is different for each heat exchange region 45 like the heat exchanger 40 of the above-described embodiment, either one of the air volume adjusting structure FC or the expansion mechanism 80 or The temperature of the refrigerant flowing through the refrigerant pipe 42 of each heat exchange region 45 may be adjusted by utilizing both of them.

Further, in the above-described embodiment, the heat exchanger 40 having the three heat exchange regions 45 is adopted, but the heat exchanger 40 may have two heat exchange regions 45, and has four or more heat exchange regions 45. It may be one.

In addition, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

100 Refrigerator 10 Refrigerator main body S Storage space 11 Storage chamber 12 Ventilation path 12a Storage space 13 Inlet 14 Outlet 15 Reduced diameter RC Refrigeration cycle mechanism 20 Compressor 30 Condenser 40 Heat exchanger 41 Fin 42 Refrigerant pipe 43 First End face part 44 Second end face part 45 Heat exchange area 50 Distributor 80 Expansion mechanism FC Air volume control structure

Claims (11)

A refrigerator provided with a heat exchanger installed in an internal space for cooling cold air in the internal space,
The heat exchanger is
A plurality of fins spaced apart from each other,
A refrigerant pipe provided so as to penetrate the plurality of fins, and a refrigerant flows inside,
A pair of first end surface portions formed by the outer edges of the plurality of fins and facing each other;
A pair of second end surface portions that are formed by the outer edges of the plurality of fins so as to intersect the first end surface portions, and that face each other;
The heat exchanger is arranged such that the cold air passes from one of the first end surface portions to the other of the first end surface portions, and is arranged in parallel along the facing direction of the second end surface portions. Having a plurality of heat exchange areas arranged,
A refrigerator characterized in that the refrigerant flowing through the refrigerant tubes of at least one of the plurality of heat exchange areas is configured to have a lower temperature than the refrigerant flowing through the refrigerant tubes of other heat exchange areas. .. Each of the heat exchange regions is provided with a different refrigerant pipe,
Further comprising an expansion mechanism connected to the upstream side of each refrigerant pipe,
The refrigerant flow rate after passing through the expansion mechanism connected to the refrigerant pipe of the one heat exchange area is smaller than the refrigerant flow rate after passing through the expansion mechanism connected to the refrigerant tube of the other heat exchange area. The refrigerator according to claim 1, which is set. A condenser that constitutes a refrigeration cycle,
The refrigerator according to claim 2, further comprising a distributor that distributes the refrigerant drawn out from the condenser to each of the expansion mechanisms. Further comprising an air passage provided in the internal space, into which cold air in a storage chamber in which a cooling target is stored is introduced.
The refrigerator according to claim 1, wherein the heat exchanger is arranged in the ventilation passage. 5. The air volume adjusting structure for adjusting the air volume of the cool air passing through the one heat exchange area to be smaller than the air volume of the cool air passing through the other heat exchange area. Refrigerator described in. The air flow rate adjusting structure is formed on the upstream side of the heat exchanger in the ventilation passage, and has an introduction port communicating with the accommodation chamber,
The refrigerator according to claim 5, wherein the introduction port is formed so as to open from a position closer to the one heat exchange region than the other heat exchange region toward a facing direction of the second end face portions. .. The air flow rate adjusting structure is formed in the ventilation path on the downstream side of the heat exchanger, and has a reduced diameter portion that is reduced in diameter so as to face the other first end surface portion of the one heat exchange region. The refrigerator according to claim 5 or 6. The refrigerator according to claim 1, wherein the one heat exchange area and the other heat exchange area each include a plurality of different fins. The refrigerator according to claim 8, wherein an interval between the plurality of fins in the one heat exchange area is wider than an interval between the plurality of fins in the other heat exchange area. 10. The refrigerator according to claim 8, wherein an interval between the plurality of fins in the one heat exchange area is 1.3 times or more an interval between the plurality of fins in the other heat exchange area. The refrigerator according to any one of claims 1 to 10, wherein a part of the one heat exchange region on the side of the first end face portion is arranged so as to face the introduction port.