Heat exchanger and refrigerator

Abstract

The present application provides a heat exchanger and a refrigerator, wherein the heat exchanger includes a heat exchanger body and a plurality of connecting pipes, the heat exchanger body includes a frame, a plurality of pipes and fins arranged in the frame, the fins are distributed in a grid shape and formed with a plurality of ventilation holes, and the plurality of pipes are arranged in different ventilation holes at intervals; each connecting pipe is used to connect two adjacent pipes, so that the plurality of connecting pipes are connected in series with the plurality of pipes. In the present application, since the fins of the heat exchanger are distributed in a grid shape, the outer peripheries of the plurality of pipes can be covered by the fins. Compared with the fins of the thin sheet structure in the prior art, the grid-shaped fins in the present application increase the heat exchange area, so that the heat exchange between the refrigerant and the fins is more sufficient, thereby improving the heat exchange efficiency of the heat exchanger.

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] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It is one of the main devices that transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions and improve energy utilization.

[0003] At present, the fins used in heat exchangers are generally thin-sheet structures, with multiple layers of thin-sheet fins arranged in parallel. Due to the limitations of their own structure, the heat transfer area of ​​the fins is limited, and the heat transfer efficiency of the heat exchanger is not high, resulting in the heat transfer coefficient of the entire heat exchanger failing to meet ideal requirements. Utility Model Content

[0004] The utility model provides a heat exchanger to solve the technical problem of low heat exchange efficiency of the heat exchanger in the prior art.

[0005] To achieve the above-mentioned purpose, the heat exchanger proposed in the present application includes a heat exchanger body and a plurality of connecting pipes, wherein the heat exchanger body includes a frame, a plurality of pipes and fins arranged in the frame, the fins are distributed in a grid shape and formed with a plurality of ventilation holes, and the plurality of pipes are arranged in different ventilation holes at intervals; each of the connecting pipes is used to connect two adjacent pipes, so that the plurality of connecting pipes are connected in series with the plurality of pipes.

[0006] Optionally, in one embodiment, the fins are of a honeycomb structure.

[0007] Optionally, in one embodiment, the fin includes a plurality of fin units, the cross-section of the fin unit is a regular hexagon, a ventilation hole is formed in each of the fin units, the centers of three adjacent fin units are respectively located at three vertices of the same regular triangle, and each of the pipes is respectively abutted against its six adjacent fin units.

[0008] Optionally, in one embodiment, the fin includes a plurality of fin units, the cross-section of the fin unit is rectangular, and the plurality of fin units are arranged in a rectangular matrix.

[0009] Optionally, in one embodiment, a plurality of the pipes are distributed at equal intervals within the fins.

[0010] Optionally, in one embodiment, the fin and the plurality of pipes are an integrally formed structure.

[0011] Optionally, in one embodiment, a plurality of the pipelines are arranged in parallel, and the connecting pipe is a U-shaped pipe, and both ends of each of the U-shaped pipes are respectively connected to ports of two adjacent pipelines.

[0012] Optionally, in one embodiment, the U-shaped tube is connected to a port of the pipeline by interference fit.

[0013] Optionally, in one embodiment, the heat exchanger body is made of aluminum alloy material.

[0014] The present application also proposes a refrigerator, which includes the heat exchanger described above.

[0015] The heat exchanger provided in the present application forms a complete heat exchange channel by arranging multiple pipes at intervals in different ventilation holes and connecting multiple connecting pipes in series with multiple pipes. When the heat exchanger is working, the refrigerant flows in the heat exchange channel. Since the fins are distributed in a grid shape, the outer peripheries of the multiple pipes can be covered by the fins. Compared with the fins with a thin film structure in the prior art, the grid-shaped fins in the present application increase the heat exchange area, making the heat exchange between the refrigerant and the fins more sufficient, thereby improving the heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of the heat exchanger provided for this application;

[0018] Figure 2 A schematic diagram of the structure of the heat exchanger body provided in this application;

[0019] Figure 3 A schematic structural diagram of a heat exchanger body provided in another embodiment of the present application;

[0020] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0021] Figure 5 This is a schematic diagram of the structure of the connecting pipe provided in this application.

[0022] Description of Figure Numbers:

[0023] 10. Heat exchanger body; 11. Frame; 12. Pipe; 13. Fin; 131. Ventilation hole; 132. Fin unit; 20. Connecting pipe.

[0024] 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

[0025] 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.

[0026] The embodiment of the present application provides a heat exchanger to solve the technical problem of low heat exchange efficiency of the heat exchanger in the prior art. The heat exchanger will be described below in conjunction with the accompanying drawings.

[0027] In the embodiments of the present application, Figure 1-Figure 3 As shown, the heat exchanger includes a heat exchanger body 10 and a plurality of connecting pipes 20. The heat exchanger body 10 includes a frame 11, a plurality of pipes 12 and fins 13 arranged in the frame 11. The fins 13 are distributed in a grid shape and are formed with a plurality of ventilation holes 131. The plurality of pipes 12 are arranged in different ventilation holes 131 at intervals. Each connecting pipe 20 is used to connect two adjacent pipes 12, so that the plurality of connecting pipes 20 are connected in series with the plurality of pipes 12.

[0028] It should be noted that the fins used in the heat exchanger in the prior art are generally thin-sheet structures, with multiple layers of thin-sheet fins arranged in parallel. Due to the limitations of their own structure, the heat exchange area of ​​the fins is limited, and the heat exchange efficiency of the heat exchanger is not high, resulting in the heat exchange coefficient of the entire heat exchanger failing to meet ideal requirements.

[0029] To this end, the heat exchanger provided in the present application forms a complete heat exchange channel by arranging multiple pipes 12 at intervals in different ventilation holes 131, and connecting multiple connecting pipes 20 in series with multiple pipes 12. When the heat exchanger is working, the refrigerant flows in the heat exchange channel. Since the fins 13 are distributed in a grid shape, the outer peripheries of the multiple pipes 12 can be covered by the fins 13. Compared with the fins with a thin film structure in the prior art, the grid-shaped fins 13 in the present application increase the heat exchange area, making the heat exchange between the refrigerant and the fins 13 more sufficient, thereby improving the heat exchange efficiency of the heat exchanger.

[0030] For details, please refer to Figure 1 and Figure 2The outer shape of the frame 11 can be set to be a rectangular parallelepiped, and the two opposite sides of the frame 11 are open, one of which is the windward side, and the other is the leeward side. One end of the pipe 12 is located on the windward side, and the other end of the pipe 12 is located on the leeward side. Some connecting pipes 20 are set on the windward side, and the connecting pipes 20 on each windward side are connected to two adjacent pipes 12. Another part of the connecting pipes 20 are set on the leeward side, and the connecting pipes 20 on each leeward side are connected to two adjacent pipes 12. The connecting pipes 20 on the windward side and the connecting pipes 20 on the leeward side are staggered, so that multiple pipes 12 are connected in series through multiple connecting pipes 20.

[0031] Since the fins 13 are distributed in a grid shape, a number of ventilation holes 131 are formed in the fins 13 at intervals. The shape of the ventilation holes 131 can be rectangular, circular, triangular, etc. The pipe 12 can be a straight pipe with a circular cross-sectional shape. The pipe 12 can be directly clamped on the inner wall of the ventilation hole 131. Since the pipe 12 is directly in contact with the inner wall of the ventilation hole 131, that is, the pipe 12 is directly in contact with the fins 13, the heat in the pipe 12 can be directly transferred to the fins 13, and the contact thermal resistance between the pipe 12 and the fins 13 is smaller, so that the heat exchange efficiency of the heat exchanger is better.

[0032] In this embodiment, the heat exchanger can be a condenser, and the condenser also includes an inlet pipe and an outlet pipe. When the condenser is working, the refrigerant enters the heat exchange channel from the inlet pipe, and the heat of the refrigerant is dissipated to the fins 13 through the pipe 12. The fins 13 contact the air and exchange heat with the air, thereby realizing the heat exchange of the refrigerant. The refrigerant after cooling finally flows out from the outlet pipe. Since the outer periphery of each pipe 12 can be covered by the fins 13, the fins 13 can fully exchange heat, and the heat exchange efficiency is higher.

[0033] Optionally, in one embodiment, see Figure 2 and Figure 3 The fin 13 is a honeycomb structure. It is understandable that, compared with conventional sheet fins 13, the honeycomb fin 13 in this embodiment has a larger heat exchange area and a better heat exchange effect, and the honeycomb fin 13 has a strong bearing capacity and is not easily deformed during transportation and use.

[0034] For further information, see Figure 3 and Figure 4The fin 13 includes a plurality of fin units 132, the cross section of the fin unit 132 is a regular hexagon, a ventilation hole 131 is formed in each fin unit 132, the centers of three adjacent fin units 132 are respectively located at the three vertices of the same regular triangle, and each pipe 12 is respectively in contact with its six adjacent fin units 132. In this embodiment, the pipe 12 can be directly clamped in the ventilation hole 131, so that the installation of the pipe 12 is convenient and the assembly efficiency is improved. At the same time, the pipe 12 can contact with the six surfaces of the fin 13, and the heat transfer performance is better.

[0035] Optionally, in one embodiment, the fin 13 includes a plurality of fin units 132, the cross section of the fin unit 132 is rectangular, and the plurality of fin units 132 are arranged in a rectangular matrix. In this embodiment, the cross section of each fin unit 132 is preferably a square. When the pipe 12 is directly clamped in the square ventilation hole 131, the pipe 12 can contact the four surfaces of the fin 13, which is not only convenient for the installation of the pipe 12, but also has a better heat transfer performance.

[0036] In other embodiments, the cross-section of the fin unit 132 may also be other regular polygonal shapes such as a regular triangle or a regular pentagon.

[0037] Optionally, in one embodiment, see Figure 2 and Figure 3 , multiple pipes 12 are evenly spaced in the fins 13. Specifically, multiple pipes 12 are arranged in a vertical and horizontal arrangement, and the distance between each row of pipes 12 is consistent, and the distance between each column of pipes 12 is consistent, so that uniform heat exchange between multiple pipes 12 and fins 13 is ensured, and the heat exchange effect of the heat exchanger is ensured. In addition, the equal spacing of multiple pipes 12 can also make the heat exchanger more beautiful.

[0038] See also Figure 1 When the connecting pipe 20 is installed with the heat exchanger body, the connecting pipe 20 installed horizontally is used to connect two adjacent pipes 12 in the same row, and the connecting pipe 20 installed vertically is used to connect two adjacent pipes 12 in the same column. Since the multiple pipes 12 are distributed at equal intervals, the connecting pipes 20 of the same specifications can be used to connect with the pipes 12, which is beneficial to reduce the molds for making the connecting pipes 20, thereby reducing the production cost.

[0039] Optionally, in one embodiment, see Figure 2 The fins 13 and the plurality of pipes 12 are an integrally formed structure.

[0040] It should be noted 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, with 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 and cause a significant decrease in heat exchange performance.

[0041] In this embodiment, the fins 13 and the multiple pipes 12 can be extruded integrally, and the multiple pipes 12 and the fins 13 together form a honeycomb structure. Not only does the pipe 12 itself have a good heat dissipation effect, but the contact thermal resistance between the pipe 12 and the fin 13 is smaller, which makes it easier for the refrigerant to dissipate heat, greatly improving the heat exchange efficiency of the heat exchanger.

[0042] Furthermore, the frame 11, the fins 13 and the plurality of pipes 12 are an integrated structure, which not only improves the production efficiency of the heat exchanger but also increases the strength of the heat exchanger.

[0043] Optionally, in one embodiment, see Figure 1 and Figure 5 , multiple pipelines 12 are arranged in parallel, and the connecting pipe 20 is a U-shaped pipe, and the two ends of each U-shaped pipe are respectively connected to the ports of two adjacent pipelines 12.

[0044] like Figure 5 As shown, both ends of the U-shaped tube have an opening, and the interior of the U-shaped tube is hollow so that the two openings are connected to each other, and the distance between the two ends of the U-shaped tube is consistent with the distance between two adjacent pipes 12. During assembly, one end of the U-shaped tube is sealed and connected to the port of one of the pipes 12, and the other end of the U-shaped tube is sealed and connected to the port of the adjacent pipe 12, so that the two adjacent pipes 12 are connected through the U-shaped tube.

[0045] Furthermore, the U-shaped tube is connected with the port of the pipe 12 by interference fit. In this embodiment, the end of the U-shaped tube can be installed into the port of the pipe 12 by utilizing the principle of thermal expansion and contraction, and then the connection between the U-shaped tube and the pipe 12 is further fixed by welding, thereby ensuring the connection strength between the U-shaped tube and the pipe 12, and the sealing performance is good, and the refrigerant will not leak.

[0046] Optionally, in one embodiment, the heat exchanger body 10 is made of aluminum alloy. It is understandable that the frame 11, the fins 13 and the plurality of pipes 12 can be formed by integrally extruding aluminum. Since aluminum has good thermal conductivity, light weight and good corrosion resistance, the heat exchanger body 10 integrally formed of aluminum has better heat exchange effect and is durable.

[0047] 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.

[0048] 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.

[0049] 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: The heat exchanger body comprises a frame, a plurality of pipes and fins arranged in the frame, the fins are distributed in a grid shape and formed with a plurality of ventilation holes, and the plurality of pipes are arranged in different ventilation holes at intervals; A plurality of connecting pipes, each of the connecting pipes is used to connect two adjacent pipelines, so that the plurality of connecting pipes are connected in series with the plurality of pipelines.

2. The heat exchanger according to claim 1, characterized in that: The fins are of honeycomb structure.

3. The heat exchanger according to claim 2, characterized in that: The fin comprises a plurality of fin units, the cross section of the fin unit is a regular hexagon, a ventilation hole is formed in each of the fin units, the centers of three adjacent fin units are respectively located at the three vertices of the same regular triangle, and each of the pipes is respectively in contact with the six adjacent fin units.

4. The heat exchanger according to claim 1, characterized in that: The fin comprises a plurality of fin units, the cross section of the fin unit is rectangular, and the plurality of fin units are arranged in a rectangular matrix.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that: The plurality of pipes are distributed in the fins at equal intervals.

6. The heat exchanger according to claim 1, characterized in that: The fin and the plurality of pipes are an integrally formed structure.

7. The heat exchanger according to claim 1, characterized in that The plurality of pipelines are arranged in parallel, and the connecting pipe is a U-shaped pipe, and both ends of each U-shaped pipe are respectively connected to the ports of two adjacent pipelines.

8. The heat exchanger according to claim 7, characterized in that The U-shaped tube is connected to the port of the pipeline by interference fit.

9. The heat exchanger according to claim 1, characterized in that: The heat exchanger body is made of aluminum alloy material.

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

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