CN218348938U - A kind of refrigerator - Google Patents

Abstract

The utility model provides a refrigerator relates to refrigerator technical field. The refrigerator comprises a refrigerating system for providing cold energy for a storage chamber of the refrigerator, wherein the refrigerating system comprises a compressor, a condenser, a capillary tube, an evaporator and an air return pipe which are sequentially connected in series; the condenser comprises a condensation pipe, and part of the condensation pipe is attached to the air return pipe with a preset length to perform heat exchange. The utility model discloses in paste condenser pipe and muffler each other and lean on and carry out the heat transfer, effectively rise the terminal temperature of muffler, avoid the terminal condensation of muffler, frost. Because the temperature of the condenser pipe is high, the heating efficiency of the air return pipe is high and the speed is high when the condenser pipe and the air return pipe are attached to each other for heat exchange, the length required for increasing the temperature of the air return pipe to room temperature is small, the preset length can be 0.5-1 meter, the length of the air return pipe is shortened, and the cost is reduced.

Description

A kind of refrigerator

Technical Field

The utility model relates to a refrigerator technical field especially relates to a refrigerator.

Background

At present, a refrigeration system of a refrigerator comprises a capillary tube connected between a condenser and an evaporator, an air return pipe arranged between the evaporator and a compressor, and a condenser tube arranged in the condenser, wherein one end of the condenser tube is connected with the compressor, and the other end of the condenser tube is connected with the capillary tube. During the use of the refrigerator, the temperature in the return air pipe needs to be raised to room temperature, so that heat exchange is performed by using a pipeline with heat. And the heat that the capillary pipe emits in the throttling process also needs the low temperature source to absorb, consequently, all bind muffler and capillary among the prior art, utilize capillary and muffler to carry out the heat exchange, satisfy the needs. And because the temperature in the capillary is lower, when the capillary exchanges heat with the air return pipe, in order to ensure that the air return pipe reaches the room temperature and avoid the air return pipe from condensation and even frost, the length of the air return pipe is generally controlled to be 2-3 meters, the length of the air return pipe is long, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an object of first aspect is to provide a refrigerator, solve among the prior art because of muffler and capillary carry out the length overlength that the heat exchange leads to the muffler, the higher problem of cost.

The utility model discloses a another of first aspect is aimed at solving among the prior art and can't carry out the problem of heat exchange with condenser pipe and muffler.

Particularly, the utility model also provides a refrigerator, including the refrigerating system who provides cold volume for refrigerator storing compartment, refrigerating system includes compressor, condenser, capillary, evaporimeter and muffler that concatenate in proper order; the condenser comprises a condensation pipe, and part of the condensation pipe is attached to the air return pipe with a preset length to perform heat exchange.

Optionally, the condensation pipe includes a heat exchange portion attached to the air return pipe with a preset length for performing heat exchange, the heat exchange portion includes one or more condensation pipe units arranged in parallel, and each condensation pipe unit is a partial pipeline of the condensation pipe.

Optionally, the outer wall of each condensation pipe unit abuts against the outer wall of the air return pipe.

Optionally, a plurality of said condenser tube units are evenly arranged around the circumference of said muffler.

Optionally, the heat exchanging part and the air return pipe are connected together through a connecting device.

Optionally, the connection means comprises a fixed snap, a heat shrink sleeve or an aluminium foil.

Optionally, the condenser tube includes an inlet end connected to the compressor, and the heat exchanging portion is adjacent to the inlet end.

Optionally, the heat exchanging part includes two condensation pipe units, and the two condensation pipe units are connected by a connection part.

Optionally, the air return pipe includes an outlet end connected to the compressor, and the heat exchanging portion is attached to the air return pipe with a preset length close to the outlet end for heat exchange.

Optionally, the preset length is 0.5-1m.

Paste condenser pipe and muffler in this scheme and lean on each other and carry out the heat transfer, effectively rise muffler end temperature, avoid muffler end condensation, frosting. Because the temperature of condenser pipe is higher, it is higher and fast to the intensification efficiency of muffler when pasting condenser pipe and muffler each other and carrying out the heat transfer, consequently it is less to increase the length that room temperature needs with the temperature of muffler, and it can be 0.5-1 meter to predetermine length, has shortened the length of muffler, has reduced the cost.

Further, this scheme is with capillary and muffler separation, and the capillary throttle step-down process can automatic heat release cooling, does not need the low temperature cold source to absorb this heat, and capillary end portion temperature is lower simultaneously, more is favorable to reducing the energy consumption. In addition, this scheme utilization condenser pipe and muffler carry out the heat transfer, utilize the muffler to reduce the temperature of condenser pipe for the temperature of condenser pipe department reduces the air conditioner planking and generates heat, promotes and produces property ability, reduces the energy consumption.

Further, the outer wall of condenser pipe and muffler directly laminates in this scheme, effectively improves the efficiency of heat transfer, can not lose the heat because of the existence of other parts, can further reduce the length of muffler.

Further, because of the temperature of the entry end of condenser pipe than the exit end is high in this scheme, to the heat exchange efficiency of muffler, consequently select the partial pipeline of the entry end of condenser pipe as heat transfer portion, can improve heat exchange efficiency, further reduce the length of muffler, reduce the cost. This also reduces the length of the condensation pipe as the heat exchanging part, the complexity of the structure of the heat exchanging part, and the modification of the entire condenser.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic block diagram of a refrigeration system according to a specific embodiment of the present invention;

FIG. 2 is a schematic block diagram of a condenser unit in close proximity to an air return in accordance with an embodiment of the present invention;

FIG. 3 is a schematic block diagram of two condenser units abutting an air return in accordance with a specific embodiment of the present invention;

FIG. 4 is a schematic block diagram of three condenser units in close proximity to an air return in accordance with a specific embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of one embodiment of two condenser tube units in close proximity to an air return tube in accordance with the present invention;

figure 6 is a schematic cross-sectional view of three condenser tube units abutting an air return tube in accordance with yet another embodiment of the present invention;

figure 7 is a schematic cross-sectional view of six condenser tube units abutting an air return tube in accordance with yet another embodiment of the present invention;

FIG. 8 is a schematic block diagram of two condenser tube units abutting the muffler and a connection portion not abutting the muffler in accordance with yet another embodiment of the present invention;

fig. 9 is a schematic structural view of two condenser tube units attached to a return air tube and connected by a connecting means according to still another embodiment of the present invention.

Detailed Description

In the description of the present embodiment, it is to be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.

Fig. 1 is a schematic block diagram of a refrigeration system according to a specific embodiment of the present invention; fig. 2 is a schematic block diagram of a condenser unit in close proximity to an air return in accordance with an embodiment of the present invention. Specifically, as shown in fig. 1 and 2, the present embodiment provides a refrigerator that may include a refrigeration system 100 that provides cooling energy to a storage compartment of the refrigerator. The refrigeration system 100 includes a compressor 10, a condenser 20, a capillary tube 30, an evaporator 40, and a return air tube 50 connected in series in this order. The condenser 20 includes a condensation duct 60, and a part of the condensation duct 60 abuts against a predetermined length of the return air duct 50 for heat exchange.

In this embodiment, the condensation pipe 60 and the air return pipe 50 are attached to each other for heat exchange, so as to effectively raise the temperature of the tail end of the air return pipe 50 and prevent the tail end of the air return pipe 50 from condensation and frosting. Because the condenser pipe 60 is higher in temperature, the heating efficiency of the air return pipe 50 is higher and the speed is higher when the condenser pipe 60 and the air return pipe 50 are attached to each other for heat exchange, so that the length required for increasing the temperature of the air return pipe 50 to room temperature is shorter, the preset length a can be 0.5-1 meter, the length of the air return pipe 50 is shortened, and the cost is reduced.

In addition, at present, it is thought that the heat released in the throttling and pressure reducing process of the capillary tube 30 needs to be absorbed by a low-temperature cold source, the heat just raises the temperature of the return air tube 50 to the ambient temperature, but the temperature of the end part of the capillary tube 30 is lower than the temperature of the corresponding part of the return air tube 50, and the temperature of the end of the capillary tube 30 is raised to a certain extent by the prior art, so that the energy conservation is not facilitated. This embodiment separates capillary 30 and muffler 50, and capillary 30 throttle depressurization process can automatic heat release cooling, does not need the low temperature cold source to absorb this heat, and capillary 30 tip portion temperature is lower simultaneously, more is favorable to reducing the energy consumption. In addition, this embodiment utilizes condenser pipe 60 and muffler 50 to carry out the heat transfer, utilizes muffler 50 to reduce the temperature of condenser pipe 60 for the temperature of condenser pipe 60 department reduces and the air conditioner planking generates heat, promotes and produces the property ability, reduces the energy consumption.

Specifically, the preset length a of the air return pipe 50 abutting against the condensation pipe 60 in the present embodiment may be 0.5 meter, 0.8 meter or 1 meter. The length can be obtained by calibrating or adjusting according to the temperature of the condensation pipe 60 and the like. The length of the return air pipe 50 is substantially the same for each kind of refrigerator, but there is a slight difference, which can be set according to the actual situation. However, the length of the muffler 50 is any value between 0.5 and 1 meter, which greatly shortens the length of the muffler 50 and reduces the cost compared with the prior scheme that the length of the muffler 50 is 2 to 3 meters in the scheme that the muffler is attached to the capillary 30.

As a specific embodiment of the present invention, the condensation pipe 60 of the present embodiment may include a heat exchange portion 70 attached to the air return pipe 50 with a predetermined length for heat exchange, the heat exchange portion 70 includes one or more condensation pipe units 71 arranged in parallel, wherein each condensation pipe unit 71 is a partial pipeline of the condensation pipe 60.

Specifically, in the present embodiment, the portion of the condensation pipe 60 abutting against the air return pipe 50 is a heat exchanging portion 70, and the heat exchanging portion 70 may be composed of a condensation pipe unit 71, so that heat exchange can be performed on the air return pipe 50 by directly abutting against a portion of the condensation pipe 60 and the air return pipe 50 with a predetermined length.

Fig. 3 is a schematic structural view of two condenser tube units 71 attached to the return air tube 50 according to an embodiment of the present invention; fig. 4 is a schematic structural view of three condenser tube units 71 attached to the return air tube 50 according to an embodiment of the present invention. In other embodiments, as shown in fig. 3 and 4, the heat exchanging part 70 may be formed by two or more than two condenser tube units 71 arranged in parallel. And each condensation pipe unit 71 is attached to the air return pipe 50, and each condensation pipe unit 71 can exchange heat with the air return pipe 50. Because each condenser pipe unit 71 in many condenser pipe units 71 can be the muffler 50 heat transfer, so its heat exchange efficiency is higher when comparing only one condenser pipe unit 71 to carry out the heat transfer to muffler 50, and the temperature that muffler 50 needs to promote is certain, consequently when heat transfer portion 70 includes many condenser pipe units 71, muffler 50's length of predetermineeing is shorter. And, the value of the preset length of the return duct 50 is decreased as the number of the condensation duct units 71 is increased.

Generally, since the volume of the refrigerator is limited and the length of the condensation duct 60 is constant, it is preferable to design a plurality of condensation duct units 71 of the heat exchange part 70 in the condensation duct 60 of the present embodiment in order to appropriately shorten the length of the return air duct 50.

As a specific embodiment of the present invention, the outer wall of each condensation tube unit 71 of the present embodiment is attached to the outer wall of the return air tube 50. The outer wall of condenser pipe 60 and muffler 50 in this embodiment directly laminates, effectively improves the efficiency of heat transfer, can not lose the heat because of the existence of other parts, can further reduce muffler 50's length.

Fig. 5 is a schematic cross-sectional view of one embodiment of the present invention with two condenser tube units 71 attached to the return air tube 50; fig. 6 is a schematic cross-sectional view of three condenser tube units 71 abutting against the return air tube 50 according to still another embodiment of the present invention. Fig. 7 is a schematic cross-sectional view of six condenser tube units 71 abutting against the return air tube 50 according to still another embodiment of the present invention. As a specific example, a plurality of the condensation duct units 71 are uniformly arranged around the circumference of the return air duct 50 regardless of the number of the condensation duct units 71 in the heat exchanging part 70. The number of the condenser tube units 71 in the heat exchanging part 70 of the present embodiment may be 2, 3, 4, 5, or 6, etc. The number of the condensation duct units 71 cannot be increased infinitely, and the number thereof can be set according to the pipe diameters of the return pipe 50 and the condensation duct 60. Of course, it is also necessary to set the heat exchange requirement between the actual return air pipe 50 and the condenser pipe 60. When the number of the condensation duct units 71 in the heat exchanging part 70 is 2 (as shown in fig. 5), the 2 condensation duct units 71 may be symmetrically disposed along both end portions of one diameter of the return duct 50. When the number of the condenser tube units 71 in the heat exchanging part 70 is 3 (as shown in fig. 6), the three condenser tube units 71 are uniformly arranged around the axis of the return air pipe 50 such that the line connecting the axes of the three condenser tube units 71 forms an equilateral triangle. If the number of the condensation duct units 71 in the heat exchanging part 70 is 4, 5, or 6 (as shown in fig. 7), etc., the plurality of condensation duct units 71 are all uniformly arranged around the circumference of the return air duct 50, and the connecting lines of the axes of the plurality of condensation duct units 71 are respectively equilateral polygons, for example, when the number of the condensation duct units 71 in the heat exchanging part 70 is 4, the connecting lines of the axes of the 4 condensation duct units 71 are squares. When the number of the condensation pipe units 71 in the heat exchanging portion 70 is 5, the line connecting the axes of the 5 condensation pipe units 71 is an equilateral pentagon. When the number of the condensation duct units 71 in the heat exchanging portion 70 is 6, the line connecting the axes of the 6 condensation duct units 71 is an equilateral hexagon.

As a specific embodiment of the present invention, when the heat exchanging portion 70 of the present embodiment can include a plurality of condenser tube units 71, the condenser tube units 71 are connected by a connecting portion 80, and the connecting portion 80 is also a part of the condenser tube. The adjacent condenser tube units 71 are arranged in parallel with each other, and the connecting portion 80 is formed in a curved shape to connect one ends of the two condenser tube units 71.

As one embodiment of the present invention, the connecting portion 80 may be a part of the heat exchanging portion 70, as shown in fig. 2 and 3. In this way, the connecting portion 80 can also abut against the return pipe 50 when connecting two adjacent condenser pipe units 71, and thus exchange heat with the return pipe 50 as with the condenser pipe units 71. For example, if the heat exchanging portion 70 in the present embodiment includes two condensation tube units 71, a connection portion 80 is disposed at one end of the two condensation tube units 71, and since the two condensation tube units 71 are symmetrically disposed at two sides of the air return tube 50, the connection portion 80 can extend from one side of the air return tube 50 to one side after extending a half circle around the circumference of the air return tube 50, and then is connected to the other condensation tube unit 71. In this way, the connecting portion 80 is always in contact with the return pipe 50, and thus exchanges heat with the return pipe 50 as in the condensation pipe unit 71.

Similarly, if the heat exchanging part 70 of the present embodiment includes 3 condenser tube units 71 (as shown in fig. 4), the upper ends of the first condenser tube unit 711 and the second condenser tube unit 712 are connected by the first connecting part 81, and the lower ends of the second condenser tube unit 712 and the third condenser tube unit 713 are connected by the second connecting part 82. The first connecting portion 81 and the second connecting portion 82 both extend along the circumferential direction of the return air pipe 50 for a third of the circumferential length of the return air pipe 50, and both abut against the return air pipe 50 for heat exchange. By analogy, when the number of the condenser tube units 71 in the heat exchanging portion 70 is 4, 5 or 6, each two adjacent condenser tube units 71 are connected by using the corresponding connecting portion 80, and the connecting portion 80 extends along the circumferential direction of the air return pipe 50 by a corresponding length, so that the plurality of condenser tube units 71 and the heat exchanging portion 70 can exchange heat with the air return pipe 50.

Fig. 8 is a schematic structural view of two condenser tube units 71 abutting against the return air tube 50 and a connecting portion 80 not abutting against the return air tube 50 according to still another embodiment of the present invention; as another embodiment of the present invention, as shown in fig. 8, the connecting portion 80 may be disposed outside the heat exchanging portion 70, and it may be connected to one end of two adjacent condenser tube units 71, but it is separated from the return air tube 50 and cannot exchange heat. For example, if the heat exchanging part 70 of the present embodiment includes two condensation pipe units 71, a connection part 80 is disposed at one end of the two condensation pipe units 71, and since the two condensation pipe units 71 are symmetrically disposed at two sides of the air return pipe 50, the connection part 80 can be connected to the condensation pipe unit 71 after being wound around another space of the condenser 20 and then returned to the position of the heat exchanging part 70.

Similarly, if the heat exchanging part 70 of the present embodiment includes 3 condenser tube units 71, the upper ends of the first condenser tube unit 711 and the second condenser tube unit 712 are connected by the first connection part 81, and the lower ends of the second condenser tube unit 712 and the third condenser tube unit 713 are connected by the second connection part 82. The first connection portion 81 and the second connection portion 82 are separated from the return air pipe 50, arranged at other spatial positions of the condenser 20, and then connected to the corresponding condensation pipe units 71. By analogy, when the number of the condenser tube units 71 in the heat exchanging portion 70 is 4, 5 or 6, each two adjacent condenser tube units 71 are connected by using the corresponding connecting portion 80, and the connecting portions 80 are separated from the return air tube 50 and then connected with the corresponding condenser tube units 71.

Specifically, whether the connection portion 80 is a part of the heat exchanging portion 70 or not may depend on the actual volume of the condenser 20 and the ease of forming the condenser 20 into a plurality of bent and folded heat exchanging portions 70.

Fig. 9 is a schematic structural view of two condenser tube units 71 attached to the return air tube 50 by a connecting means according to still another embodiment of the present invention. As a specific embodiment of the present invention, as shown in fig. 9, the heat exchanging portion 70 and the muffler 50 are connected together by a connecting device 90. Since the heat exchanging portion 70 of the present embodiment needs to be attached to the air return pipe 50, the heat exchanging portion 70 needs to be connected to the air return pipe 50 by the connecting device 90, which not only increases the heat exchanging effect, but also avoids loosening.

As a specific embodiment of the present invention, the connecting device 90 in this embodiment includes a fixing buckle, a heat shrinkable sleeve or an aluminum foil.

Specifically, when a clip is used as the connecting means 90, the clip is merely a part for connecting the muffler 50 and the heat exchanging part 70. When the aluminum foil is used as the connecting device 90, the aluminum foil can also participate in the heat exchange process while connecting the muffler 50 and the heat exchange part 70. If a heat shrinkable sleeve is used as the connecting device 90, the heat shrinkable sleeve has a heat insulating effect while connecting the air return pipe 50 and the heat exchanging portion 70. The three connecting devices can be selected according to actual conditions.

As a specific embodiment of the present invention, the condenser tube in this embodiment may include an inlet end connected to the compressor 10, and the heat exchanging portion 70 is close to the inlet end. Specifically, although the heat exchanging unit 70 may be any part of the condensation duct in general, since the inlet end of the condensation duct has a higher temperature than the outlet end thereof and the heat exchange efficiency with respect to the return duct 50 is high, a part of the duct at the inlet end of the condensation duct is selected as the heat exchanging unit 70, thereby improving the heat exchange efficiency, further reducing the length of the return duct 50, and reducing the cost. This also makes it possible to reduce the length of the condensation pipe as the heat exchanging portion 70, to reduce the complexity of the structure of the heat exchanging portion 70, and to modify the entire condenser 20.

As a specific embodiment of the present invention, the muffler 50 of the present embodiment may include an outlet connected to the compressor 10, and the heat exchanging portion 70 is attached to the muffler 50 with a predetermined length near the outlet for heat exchange.

The outlet end of the air return pipe 50 is selected as the position of the pipeline for exchanging heat with the heat exchanging portion 70 in this embodiment, mainly because the air return pipe 50 mainly needs to adjust the temperature of the outlet end to be consistent with the ambient temperature, thereby ensuring that the air return pipe 50 does not condense or even frost.

A specific heat exchanging part 70 including two condensation duct units 71 is specifically described as an example.

Specifically, in the present embodiment, the refrigeration system 100 includes a compressor 10, a condenser 20, a capillary tube 30, an evaporator 40, and a return air pipe 50, which are connected in series in this order. A predetermined length of the pipe line at the outlet end of the return pipe 50 connected to the compressor 10 is selected to exchange heat with the heat exchanging part 70. And the heat exchanging part 70 selects a pipe near an inlet end of the condensing pipe connected to the compressor 10 as the heat exchanging part 70. The partial condensation pipeline is formed into two condensation pipe units 71, the two condensation pipe units 71 are arranged on two sides of the air return pipe 50 in parallel and are respectively in parallel contact with the air return pipe 50, and one ends (upper ends in the figure) of the two condensation pipe units 71 are connected by a connecting part 80. The connecting portions 80 extend from the left side to the right side along the axis of the return air duct 50, and both ends of the two connecting portions 80 are connected to the upper ends of the two condenser tube units 71, respectively. The two condenser tube units 71 and the connecting portion 80 are connected to the selected air return tube 50 with a preset length at the outlet end by using an aluminum foil or a heat shrinkable sleeve, and the two condenser tube units 71 and the connecting portion 80 are attached to the air return tube 50 for heat exchange. After the refrigerator is adjusted, the length of the muffler 50 is selected as appropriate. The length of the pipeline is adjusted according to the debugging result, and the part where the heat exchanging part 70 and the return air pipe 50 are connected is welded with the refrigerator.

In the above embodiment, even if the temperature at the outlet end of the air return pipe 50 reaches the ambient temperature, the condensation and frosting of the pressure end of the air return pipe 50 are avoided. Meanwhile, the temperature of the condenser pipe is reduced, the heating of the outer plate of the air conditioner is reduced, the product performance is improved, and the energy consumption is reduced.

In the description of the present embodiments, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "specifically," or "some examples," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A refrigerator is characterized by comprising a refrigerating system for providing cold energy for a storage chamber of the refrigerator, wherein the refrigerating system comprises a compressor, a condenser, a capillary tube, an evaporator and an air return pipe which are sequentially connected in series; the condenser comprises a condensation pipe, and part of the condensation pipe is attached to the air return pipe with a preset length to perform heat exchange.

2. The refrigerator according to claim 1,

the condenser pipe includes with predetermineeing length the muffler pastes each other and leans on the heat transfer portion in order to carry out the heat exchange, heat transfer portion includes one or parallel arrangement's many condenser pipe units, wherein, each the condenser pipe unit is the partial pipeline of condenser pipe.

3. The refrigerator according to claim 2,

the outer wall of each condensation pipe unit is attached to the outer wall of the air return pipe.

4. The refrigerator according to claim 2 or 3,

the plurality of condenser tube units are uniformly arranged around the circumference of the air return tube.

5. The refrigerator according to claim 2 or 3,

the heat exchanging part is connected with the air return pipe through a connecting device.

6. The refrigerator according to claim 5,

the connecting device comprises a fixing buckle, a heat-shrinkable sleeve or an aluminum foil.

7. The refrigerator according to claim 2 or 3,

the condensing pipe comprises an inlet end connected with the compressor, and the heat exchange portion is close to the inlet end.

8. The refrigerator according to claim 2 or 3,

the heat exchange portion includes two condensation tube units, and the two condensation tube units are connected by a connection portion.

9. The refrigerator according to claim 2 or 3,

the air return pipe comprises an outlet end connected with the compressor, and the heat exchanging part is attached to the air return pipe with a preset length close to the position of the outlet end for heat exchange.

10. The refrigerator according to any one of claims 1 to 3,

the preset length is 0.5-1m.

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