Heat exchanger and refrigerator

Abstract

The present application provides a heat exchanger and a refrigerator, wherein the heat exchanger includes a plurality of heat exchange units and a plurality of connecting pipes, wherein the heat exchange units are provided with flow guide grooves on opposite sides along a first direction, the plurality of heat exchange units are connected in sequence in the first direction, and the flow guide grooves of two adjacent heat exchange units are enclosed to form a flow guide channel; each connecting pipe is used to connect two adjacent flow guide channels, so that the plurality of connecting pipes are connected in series with the plurality of flow guide channels. In the present application, the heat exchanger does not need to be provided with a heat exchange pipe separately, and a part of the structure of the heat exchange unit is directly used as the flow guide channel, and then the heat exchange channel of the condenser can be formed by connecting with the plurality of flow guide channels through the connecting pipe. When the refrigerant flows in the heat exchange channel, since the refrigerant is in direct contact with the surface of the heat exchange unit, the problem of large contact thermal resistance between the fin and the heat exchange tube in the prior art is overcome, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to a heat exchanger and a refrigerator. Background Art

[0002] At present, the condenser of the refrigerator includes a microchannel condenser, a spiral fin condenser, a fin condenser, etc. As for the microchannel condenser, the heat exchange tubes of the microchannel condenser in the related technology are circular tubes arranged in the horizontal direction, and the heat exchange tubes and the fins are connected by an expansion tube method, resulting in a large contact thermal resistance between the heat exchange tubes and the fins and a low heat exchange efficiency. Utility Model Content

[0003] The utility model provides a heat exchanger to solve the technical problem in the prior art that the heat exchange efficiency of the heat exchanger is low due to the large contact thermal resistance between the heat exchange tube and the fin.

[0004] To achieve the above-mentioned purpose, the heat exchanger proposed in the present application includes multiple heat exchange units and multiple connecting pipes, and the heat exchange units are respectively provided with guide grooves on opposite sides along the first direction. The multiple heat exchange units are connected in sequence in the first direction, and the guide grooves of two adjacent heat exchange units are enclosed to form a guide channel; each connecting pipe is used to connect two adjacent guide channels, so that the multiple connecting pipes are connected in series with the multiple guide channels.

[0005] Optionally, in one embodiment, the heat exchange unit includes a frame body, and the outer wall of the frame body is provided with two convex edges on opposite sides along the first direction, respectively, and the two convex edges are spaced apart and enclosed with the frame body to form the guide groove.

[0006] Optionally, in one embodiment, the convex edge extends along the second direction, and along the first direction, the convex edges of two adjacent frames are respectively sealed and connected correspondingly, so that the two adjacent frames enclose the guide channel with openings at both ends along the second direction, and the first direction and the second direction are vertically or obliquely arranged.

[0007] Optionally, in one embodiment, the heat exchange unit further includes fins, the fins are in a honeycomb structure, and the fins are disposed in the frame and connected to an inner wall of the frame.

[0008] Optionally, in one embodiment, the plurality of connecting pipes are disposed at two opposite ends of the heat exchange unit in the second direction, and the plurality of connecting pipes are staggered in the first direction.

[0009] Optionally, in one embodiment, the connecting pipe has an inlet end and an outlet end which are protrudingly arranged, and the inlet end and the outlet end are respectively connected to ports of two adjacent guide channels.

[0010] Optionally, in one embodiment, the sizes of the inlet end and the outlet end are matched with the sizes of the guide channels, so that the inlet end and the outlet end can be respectively inserted into two adjacent guide channels.

[0011] Optionally, in one embodiment, at least two of the heat exchange units are stacked along the airflow direction.

[0012] Optionally, in one embodiment, each of the heat exchange units is an integrally formed structure.

[0013] The present application also proposes a refrigerator, which includes the heat exchanger described above.

[0014] The heat exchanger provided in the present application includes multiple heat exchange units and multiple connecting pipes. The multiple heat exchange units are connected in sequence in a first direction to enclose the guide grooves of two adjacent heat exchange units to form a guide channel. The multiple connecting pipes are used to be connected in series with the multiple guide channels. That is to say, the heat exchanger in the present application does not need to set up additional heat exchange pipes, and directly uses part of the structure of the heat exchange unit as the guide channel, and then connects with the multiple guide channels through the connecting pipe to form a heat exchange channel of the condenser. When the refrigerant flows in the heat exchange channel, since the refrigerant directly contacts the surface of the heat exchange unit, the problem of large contact thermal resistance between the fins and the heat exchange tubes in the prior art is overcome, thereby improving the heat exchange efficiency. In addition, since there is no need to set up heat exchange tubes separately, the use of heat exchange tubes is reduced, which is conducive to saving product costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of the heat exchanger provided for this application;

[0017] Figure 2 A schematic diagram of the structure of the heat exchange unit provided for this application;

[0018] Figure 3 A schematic diagram of the structure of the heat exchange unit provided in this application from another angle;

[0019] Figure 4 A schematic diagram of the structure of the connecting pipe provided for this application;

[0020] Figure 5A schematic structural diagram of a heat exchanger provided in another embodiment of the present application.

[0021] Description of Figure Numbers:

[0022] Label name Label name Label name 10 Heat exchange unit 112 Convex edge 20 Connecting pipe 11 Frame 12 Diversion channel 21 Import side 111 Guide groove 13 Fins 22 Export

[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] The embodiment of the present application provides a heat exchanger to solve the technical problem in the prior art that the heat exchanger has low heat exchange efficiency due to the large contact thermal resistance between the heat exchange tube and the fin.

[0026] In the embodiments of the present application, Figure 1 and Figure 2 As shown, the heat exchanger includes a plurality of heat exchange units 10 and a plurality of connecting pipes 20. The heat exchange units 10 are provided with guide grooves 111 on opposite sides along the first direction, respectively. The plurality of heat exchange units 10 are connected in sequence in the first direction, and the guide grooves 111 of two adjacent heat exchange units 10 enclose a guide channel 12; each connecting pipe 20 is used to connect two adjacent guide channels 12, so that the plurality of connecting pipes 20 are connected in series with the plurality of guide channels 12.

[0027] It should be noted that the heat exchange tubes of the condenser in the related art are circular tubes arranged in the horizontal direction, and the heat exchange tubes and the fins are connected by expansion tubes, resulting in a large contact thermal resistance between the heat exchange tubes and the fins and a low heat exchange efficiency.

[0028] To this end, the heat exchanger provided in the present application connects multiple heat exchange units 10 in sequence in a first direction so as to enclose the guide grooves 111 of two adjacent heat exchange units 10 to form a guide channel 12, and multiple connecting pipes 20 are used to be connected in series with the multiple guide channels 12. That is to say, the heat exchanger in the present application does not need to set up additional heat exchange pipes, and directly uses part of the structure of the heat exchange unit 10 as the guide channel 12, and then connects the multiple guide channels 12 in series through the connecting pipe 20 to form a heat exchange channel of the condenser. When the refrigerant flows in the heat exchange channel, since the refrigerant directly contacts the surface of the heat exchange unit 10, the problem of large contact thermal resistance between the fins 13 and the heat exchange tubes in the prior art is overcome, thereby improving the heat exchange efficiency; in addition, since there is no need to set up heat exchange tubes separately, the use of heat exchange tubes is reduced, which is conducive to saving product costs.

[0029] For details, please refer to Figure 1 and Figure 2 The heat exchange unit 10 has a roughly rectangular shape. The rectangular heat exchange unit 10 has two side surfaces that are arranged opposite to each other in the first direction. The two side surfaces are respectively provided with flow guide grooves 111 of the same shape and size. Exemplarily, the cross section of the flow guide groove 111 is semicircular. When multiple heat exchange units 10 are connected in sequence in the first direction, the semicircular flow guide grooves 111 of two adjacent heat exchange units 10 can be enclosed to form a flow guide channel 12 with a circular cross section. In other embodiments, the cross section of the flow guide groove 111 can also be rectangular, trapezoidal, etc.

[0030] In this embodiment, the plurality of heat exchange units 10 can be connected and fixed in sequence by welding, which is conducive to ensuring the sealing between two adjacent heat exchange units 10, and the connection strength is high and not prone to deformation or breakage.

[0031] Optionally, in one embodiment, see Figure 2 The heat exchange unit 10 includes a frame body 11 , and two convex edges 112 are respectively provided on opposite sides of the outer wall of the frame body 11 along the first direction. The two convex edges 112 are arranged at intervals and enclosed with the frame body 11 to form a guide groove 111 .

[0032] Specifically, the outer shape of the frame 11 is roughly rectangular, the convex edge 112 is a flat plate structure, and the two convex edges 112 and the side of the frame 11 are enclosed to form a guide groove 111 with a rectangular cross section. Each convex edge 112 can be set at the edge of the corresponding side of the frame 11, so that the distance between the two convex edges 112 is increased, the width of the guide groove 111 is larger, the contact area between the refrigerant and the frame 11 is larger, and the heat exchange effect is better.

[0033] For further information, see Figure 1 and Figure 2The convex edge 112 extends along the second direction, and along the first direction, the convex edges 112 of the two adjacent frames 11 are respectively sealed and connected, so that the two adjacent frames 11 enclose a guide channel 12 with openings at both ends along the second direction, and the first direction and the second direction are vertically or obliquely arranged.

[0034] For example, see Figure 2 , the first direction and the second direction are two directions perpendicular to each other, the first direction is the height direction of the frame 11, and the second direction is the length direction of the frame 11. In the second direction, the two ends of the convex edge 112 are flush with the ends of the frame 11, while in the first direction, the convex edges 112 on both sides of the frame 11 extend in opposite directions respectively, and the convex edges 112 on two adjacent frames 11 can be connected one by one by welding, so that a guide channel 12 is formed between each of the two adjacent frames 11. In this embodiment, the convex edges 112 on two adjacent frames 11 are connected by welding, which not only ensures the connection strength between the multiple heat exchange units 10, but also ensures the sealing performance of the guide channel 12, thereby preventing the refrigerant from leaking from the gap between the two convex edges 112.

[0035] When the number of heat exchange units 10 in this embodiment is n, the number of guide channels 12 is n-1 accordingly. Multiple guide channels 12 and multiple connecting pipes 20 are connected in series in sequence to form a complete heat exchange channel. The inlet of the heat exchange channel is located at the guide channel 12 formed by the two heat exchange units 10 at the head end, and the outlet of the heat exchange channel is located at the guide channel 12 formed by the two heat exchange units 10 at the end.

[0036] Optionally, in one embodiment, see Figure 1-Figure 3 The heat exchange unit 10 further includes fins 13 , which have a honeycomb structure. The fins 13 are disposed in the frame 11 and connected to the inner wall of the frame 11 .

[0037] It is understandable that the honeycomb fins 13 in the present application have a larger heat exchange area and a better heat exchange effect than conventional sheet fins 13. When the heat exchanger is working, the refrigerant flows in the guide channel 12, and the heat of the refrigerant is dissipated to the fins 13 through the frame 11. The fins 13 contact the air and exchange heat with the air, thereby realizing the heat exchange of the refrigerant.

[0038] In this embodiment, a part of the structure of the frame 11 is used as the guide channel 12, and there is no need to set up a heat exchange tube separately. When the refrigerant flows in the guide channel 12, since the fins 13 are set on the frame 11, the heat of the refrigerant can be directly transferred to the fins 13 through the frame 11, thereby overcoming the large contact thermal resistance between the fins 13 and the heat exchange tubes in the prior art, and effectively improving the heat exchange efficiency.

[0039] Optionally, in one embodiment, see Figure 1 , multiple connecting pipes 20 are arranged at two opposite ends of the heat exchange unit 10 in the second direction, and the multiple connecting pipes 20 are staggered in the first direction. It can be understood that the multiple connecting pipes 20 are staggered in the first direction, so that the multiple connecting pipes 20 can be connected in series with the multiple flow guide channels 12, and the length of the heat exchange channel can be increased, so that the refrigerant can fully exchange heat with the fins 13.

[0040] Optionally, in one embodiment, see Figure 1 and Figure 4 The connecting pipe 20 has an inlet end 21 and an outlet end 22 which are protrudingly arranged, and the inlet end 21 and the outlet end 22 are respectively connected to the ports of two adjacent guide channels 12 .

[0041] Specifically, the connecting tube 20 is hollow inside, and the inlet end 21 and the outlet end 22 are connected to each other. The shapes of the inlet end 21 and the outlet end are adapted to the shape of the cross section of the guide channel 12. When the cross section of the guide channel 12 is rectangular, the inlet end 21 and the outlet end are both rectangular. When the connecting tube 20 is assembled with the heat exchange unit 10, the periphery of the inlet end 21 can be welded to one end of the frame 11 so that one of the guide channels 12 is connected to the inlet end 21, and then the outlet end 22 is welded to the other end of the frame 11 so that another adjacent guide channel 12 is connected to the outlet end 22, thereby connecting two adjacent guide channels 12 through the connecting tube 20.

[0042] For further information, see Figure 1 and Figure 4 The sizes of the inlet end 21 and the outlet end 22 are adapted to the size of the guide channel 12, so that the inlet end 21 and the outlet end 22 can be respectively inserted into two adjacent guide channels 12. It can be understood that in this embodiment, by inserting the inlet end 21 and the outlet end 22 into the corresponding guide channels 12, it is helpful to reduce the difficulty of assembling the connecting pipe 20 and the heat exchange unit 10, and it is convenient to assemble the connecting pipe 20. After the inlet end 21 and the outlet end 22 are respectively inserted into the corresponding guide channels 12, they are further fixed by welding, which is helpful to increase the sealing performance between the connecting pipe 20 and the heat exchange unit 10.

[0043] Optionally, in one embodiment, see Figure 5 At least two heat exchange units 10 are stacked along the airflow direction. It is understandable that the stacking of multiple heat exchange units 10 makes the coverage area of ​​the fins 13 larger, the refrigerant heat exchange is more sufficient, and the heat exchange efficiency of the condenser is further improved.

[0044] Exemplarily, the condenser includes two rows of heat dissipation structures, each row of heat dissipation structures is formed by connecting a plurality of heat dissipation units in sequence along a first direction, and a plurality of connecting pipes 20 of each row of heat dissipation structures are connected in series with a plurality of guide channels 12 .

[0045] In this embodiment, the two heat exchange channels formed by the two rows of heat dissipation structures can be arranged in parallel or in series. When the two heat exchange channels are arranged in parallel, the heat exchanger further includes a first header and a second header, and the refrigerant in the first header is divided into the two heat exchange channels, and then the refrigerant is heat exchanged through the fins 13 and converges in the second header; when the two heat exchange channels are arranged in series, the two heat exchange channels are connected through the connecting pipe 20, thereby increasing the length of the heat exchange channel, so that the refrigerant can more fully exchange heat with the fins 13, and the heat exchange effect of the heat exchanger is better.

[0046] Optionally, in one embodiment, see Figure 2 and Figure 3 Each heat exchange unit 10 is an integrally formed structure. For example, the heat exchange unit 10 can be formed by extrusion of aluminum. Since aluminum has good thermal conductivity, light weight, and good corrosion resistance, the heat exchange effect between the frame 11 and the fins 13 integrally formed by aluminum material is better and durable.

[0047] It is understandable that in the prior art, fins are mostly fixed to the heat exchange tubes by welding, resulting in a large contact thermal resistance between the fins and the heat exchange tubes, and a low heat transfer efficiency. Moreover, after a period of use, the welds between the welds will accelerate oxidation and the welds will loosen, which will also increase the contact thermal resistance, resulting in a significant decrease in heat exchange performance. In this embodiment, the fins 13 and the frame 11 are an integrated structure, which not only has higher strength, but also reduces the contact thermal resistance between the fins 13 and the frame 11, and has a better heat exchange effect.

[0048] An embodiment of the present application also provides a refrigerator, which includes a heat exchanger. The specific structure of the heat exchanger refers to the above embodiment. Since the refrigerator adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0049] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0050] The heat exchanger provided in the embodiment of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heat exchanger, characterized in that: include: A plurality of heat exchange units, wherein flow guide grooves are respectively provided on opposite sides of the heat exchange units along a first direction, the plurality of heat exchange units are sequentially connected in the first direction, and the flow guide grooves of two adjacent heat exchange units enclose a flow guide channel; A plurality of connecting pipes, each of the connecting pipes is used to connect two adjacent flow guiding channels, so that the plurality of connecting pipes are connected in series with the plurality of flow guiding channels.

2. The heat exchanger according to claim 1, characterized in that: The heat exchange unit comprises a frame body, and two convex edges are respectively arranged on opposite sides of the outer wall of the frame body along the first direction. The two convex edges are arranged at intervals and enclosed with the frame body to form the guide groove.

3. The heat exchanger according to claim 2, characterized in that: The convex edge extends along the second direction, and along the first direction, the convex edges of two adjacent frames are respectively sealed and connected, so that the two adjacent frames enclose the guide channel with openings at both ends along the second direction, and the first direction and the second direction are vertically or obliquely arranged.

4. The heat exchanger according to claim 2, characterized in that: The heat exchange unit further includes fins, which are in a honeycomb structure. The fins are arranged in the frame and connected to the inner wall of the frame.

5. The heat exchanger according to claim 1, characterized in that: The plurality of connecting pipes are disposed at two opposite ends of the heat exchange unit in the second direction, and the plurality of connecting pipes are staggered in the first direction.

6. The heat exchanger according to claim 1, characterized in that The connecting pipe has an inlet end and an outlet end which are protrudingly arranged, and the inlet end and the outlet end are respectively connected to the ports of two adjacent guide channels.

7. The heat exchanger according to claim 6, characterized in that The sizes of the inlet end and the outlet end are adapted to the sizes of the flow guiding channels, so that the inlet end and the outlet end can be respectively inserted into two adjacent flow guiding channels.

8. The heat exchanger according to claim 1, characterized in that At least two of the heat exchange units are stacked along the airflow direction.

9. The heat exchanger according to claim 1, characterized in that: Each of the heat exchange units is an integrally formed structure.

10. A refrigerator, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.

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