Double-pipe heat exchanger for air conditioner and air conditioner

Abstract

The utility model relates to the technical field of air conditioners, and provides a double-pipe heat exchanger for an air conditioner and the air conditioner. The double-pipe heat exchanger for the air conditioner comprises an outer pipe and an inner pipe. A containing channel is formed in the outer pipe. The inner pipe is arranged in the containing channel in a sleeved mode. The inner tube comprises at least one flat tube. And an overflowing channel is formed between the at least one flat pipe and the outer pipe. And each flat pipe is provided with a plurality of micro-channels. Through the structural arrangement, the inner pipe comprising at least one flat pipe is arranged in the containing channel of the outer pipe, and the micro-channel structure is arranged on the flat pipe, so that the filling amount of a refrigerant medium in the inner pipe can be reduced while the heat exchange area between different heat exchange media of the inner pipe and the outer pipe is increased; the miniaturization design of the heat exchanger is realized; and the heat exchange cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a shell and tube heat exchanger for air conditioners and the air conditioner. Background Art

[0002] As people's living standards continue to improve, air conditioners have become an indispensable household appliance in life. Heat exchangers are an indispensable component of air conditioners. In the prior art, heat exchangers are mostly of inner and outer circular sleeve structures. A circular refrigerant channel is set in the inner tube. In order to increase the heat exchange area between the inner and outer tubes, the diameter of the inner tube is usually increased, resulting in a corresponding increase in the diameter of the circular refrigerant channel. In a heat exchanger with this structure, a large amount of refrigerant needs to be filled in the refrigerant channel, and its heat exchange cost is relatively high. Utility Model Content

[0003] The utility model provides a shell-and-tube heat exchanger for air conditioner and air conditioner, which are used to solve the problem that a large amount of refrigerant needs to be filled in the refrigerant channel in the inner tube of the existing heat exchanger and the heat exchange cost is relatively high.

[0004] According to a first aspect of the utility model, a shell-and-tube heat exchanger for an air conditioner is provided, comprising: an outer tube, in which a receiving channel is arranged; an inner tube, in which the inner tube is sleeved into the receiving channel, the inner tube comprising at least one flat tube, a flow channel is formed between the at least one flat tube and the outer tube, and each of the flat tubes is provided with a plurality of microchannels.

[0005] According to the shell-and-tube heat exchanger for air conditioning provided by the utility model, a support member is provided between the at least one flat tube and the outer tube.

[0006] According to the air conditioner shell and tube heat exchanger provided by the utility model, the support member is a spiral support plate. One side of the spiral support plate is connected to the at least one flat tube. The other side of the spiral support plate is connected to the inner side wall of the outer tube.

[0007] According to the utility model, the air conditioning shell and tube heat exchanger provided by the utility model is a spiral channel formed between the spiral support plate, the inner wall of the outer tube and the flat tube. The extension direction of the spiral channel is consistent with the flow direction of the microchannel.

[0008] According to the utility model, a shell-and-tube heat exchanger for air conditioning is provided, wherein the inner tube comprises two flat tubes, the two flat tubes are at least partially connected to each other, and each flat tube can form the flow passage with the inner side wall of the outer tube.

[0009] According to the utility model, a shell-and-tube heat exchanger for air conditioning is provided, wherein the two flat tubes are arranged in a mutually intersecting manner in the accommodating channel, and the intersection line of the two flat tubes is consistent with the flow direction of the microchannel, and the flow channel is formed between the mutually intersecting flat tubes and the inner side wall of the outer tube.

[0010] According to the air conditioner shell and tube heat exchanger provided by the utility model, the inner tube includes two flat tubes, and the two flat tubes are arranged at intervals from each other.

[0011] According to a shell-and-tube heat exchanger for air conditioning provided by the utility model, the inner tube includes at least three flat tubes, and the flat tubes are connected to each other to form a polygonal cylinder structure. The flow channel includes a first channel and a second channel, the first channel is located between each flat tube and the inner side wall of the outer tube, and the second channel is located in the inner cavity of the polygonal cylinder structure.

[0012] According to the shell-and-tube heat exchanger for air conditioning provided by the utility model, there are a plurality of flat tubes, and the plurality of flat tubes are integrally formed.

[0013] According to a second aspect of the utility model, an air conditioner is provided, comprising the air conditioner shell and tube heat exchanger as described above.

[0014] The shell-and-tube heat exchanger for air conditioning provided by the utility model includes an outer tube and an inner tube. A receiving channel is provided in the outer tube. For example, the receiving channel is a cylindrical receiving channel coaxially arranged with the outer tube. The inner tube is sleeved into the receiving channel. In particular, the inner tube includes at least one flat tube. A flow channel is formed between the inner tube and the outer tube, that is, a flow channel is formed between at least one flat tube and the outer tube. A plurality of microchannels are provided on each flat tube. Different media flow through the flow channel and the microchannels of the flat tubes respectively to achieve heat exchange between different media.

[0015] Through this structural setting, an inner tube including at least one flat tube is arranged in the accommodating channel of the outer tube, and a microchannel structure is arranged on the flat tube. This can reduce the filling amount of the refrigerant medium in the inner tube while ensuring that the heat exchange area between different heat exchange media in the inner tube and the outer tube is increased, which is conducive to realizing the miniaturized design of the heat exchanger and thus reducing the heat exchange cost.

[0016] On the other hand, the flat tube is divided into a plurality of microchannels by a plurality of partitions, and the plurality of partitions also play a supporting role for the flat tube, thereby making the flat tube have a better pressure-bearing effect.

[0017] Furthermore, in the air conditioner provided by the utility model, since it includes the air conditioning shell and tube heat exchanger as described above, the advantages as described above are also specifically described. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 1 , wherein the inner tube comprises a flat tube.

[0020] Figure 2 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 2 , wherein the outer tube is not included and the inner tube includes a flat tube.

[0021] Figure 3 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 3 , wherein no support member is included and the inner tube includes two flat tubes.

[0022] Figure 4 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 4 , wherein the inner tube includes two flat tubes.

[0023] Figure 5 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 5 , wherein the inner tube includes two flat tubes.

[0024] Figure 6 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 6 , wherein the outer tube is not included and the inner tube includes three flat tubes.

[0025] Figure 7 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 7 , wherein the inner tube includes three flat tubes.

[0026] Figure 8 This is a schematic diagram of the structure of the air conditioning shell and tube heat exchanger provided by the utility model Figure 8 , wherein the inner tube includes two flat tubes.

[0027] Reference numerals: 100: outer tube; 200: flat tube; 210: microchannel; 300: flow channel; 400: support member. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0031] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0033] Combine the following Figures 1 to 8 The utility model provides a shell and tube heat exchanger for air conditioning and an air conditioner. It should be understood that the following description is only an illustrative embodiment of the utility model and does not constitute any particular limitation to the utility model.

[0034] The first embodiment of the utility model provides a shell and tube heat exchanger for air conditioning, such as Figures 1 to 8 As shown, the air-conditioning shell-and-tube heat exchanger comprises: an outer tube 100, in which a receiving channel is provided; an inner tube, which is sleeved into the receiving channel, and the inner tube comprises at least one flat tube 200, and a flow channel 300 is formed between at least one flat tube 200 and the outer tube 100, and each flat tube 200 is provided with a plurality of microchannels 210.

[0035] In the shell-and-tube heat exchanger for air conditioning provided by the utility model, an outer tube 100 and an inner tube are included. An accommodating channel is provided in the outer tube 100. For example, the accommodating channel is a cylindrical accommodating channel coaxially arranged with the outer tube 100. The inner tube is sleeved into the accommodating channel. In particular, the inner tube includes at least one flat tube 200. A flow passage 300 is formed between the inner tube and the outer tube 100, that is, a flow passage 300 is formed between at least one flat tube 200 and the outer tube 100. A plurality of microchannels 210 are provided on each flat tube 200. Different media flow through the flow passage 300 and the microchannels 210 of the flat tubes 200, respectively, to achieve heat exchange between different media. For example, the heat exchange medium in the flow passage 300 can be water, and the heat exchange medium in the microchannel 210 can be a refrigerant.

[0036] Through this structural setting, an inner tube including at least one flat tube 200 is arranged in the accommodating channel of the outer tube 100, and a microchannel 210 structure is arranged on the flat tube 200. While ensuring that the heat exchange area between different heat exchange media in the inner tube and the outer tube 100 is increased, the filling amount of the refrigerant medium in the inner tube can be reduced, which is conducive to realizing the miniaturized design of the heat exchanger and thus reducing the heat exchange cost.

[0037] On the other hand, the flat tube 200 is divided into a plurality of microchannels by a plurality of partitions, and the plurality of partitions also play a supporting role for the flat tube 200, so that the flat tube 200 has a better pressure-bearing effect.

[0038] In one embodiment of the present invention, Figures 1 to 7 As shown, the flow direction of each microchannel 210 is exactly the same as the flow direction of the flow channel 300. Therefore, the heat exchange medium in the flow channel 300 can fully exchange heat with the coolant medium in the microchannel 210 during the flow process, thereby improving the heat exchange effect of the heat exchanger.

[0039] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, a support member 400 is provided between at least one flat tube 200 and the outer tube 100. In other words, a support member 400 is provided between the inner tube and the outer tube 100. For example, the inner tube and the outer tube 100 can be coaxially arranged. The support member 400 can provide support force for the inner tube and the outer tube 100, which can improve the strength of the heat exchanger on the one hand; on the other hand, when the outer tube 100 is bent, the relative position between the inner tube and the outer tube 100 can be fixed, thereby ensuring the heat exchange uniformity of the heat exchange medium during the flow process.

[0040] For example, in one embodiment of the present invention, the support member 400 is a spiral support plate, one side of which is connected to at least one flat tube 200 , and the other side of which is connected to the inner wall of the outer tube 100 .

[0041] Furthermore, in another embodiment of the present invention, the flow passage 300 is a spiral passage formed between the spiral support plate, the inner wall of the outer tube 100 and the flat tube 200. The extending direction of the spiral passage is consistent with the flow direction of the microchannel 210.

[0042] like Figure 1 , Figure 2 and Figure 4 As shown, a spiral support plate is provided between the inner tube and the outer tube 100. One side edge of the spiral support plate is connected to the inner wall of the outer tube 100, and the other side edge of the spiral support plate is connected to the outer wall of the inner tube. Thus, the connection length between the spiral support plate and the inner tube and the outer tube 100 can be extended, thereby improving the strength. In addition, a spiral channel can be formed between the spiral support plate and the inner tube and the outer tube 100. The spiral channel is a flow channel 300. The spiral channel can extend the stroke of the flowing medium inside it, and then, can extend the heat exchange time between the medium in the flow channel 300 and the medium in the microchannel 210, further improving the heat exchange effect of the heat exchanger.

[0043] In addition, compared with the existing structure of processing threads on the outer wall of the inner tube, the processing difficulty is relatively low and the processing cost is correspondingly reduced. The inner tube can also be set as an aluminum inner tube or a steel inner tube to improve the structural strength.

[0044] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the inner tube includes a flat tube 200, which has a relatively simple structure and a good heat exchange effect.

[0045] In another embodiment of the present invention, the inner tube includes two flat tubes 200. For example, Figure 3 and Figure 4 As shown, the two flat tubes 200 are at least partially connected to each other. For example, the two flat tubes 200 can be arranged in a mutually fitting manner in the accommodating channel. Alternatively, the two flat tubes 200 can also be connected to each other by one side and arranged in a V-shaped structure in the accommodating channel. The two flat tubes 200 can adopt an integrally formed structure, which is simple to manufacture and is conducive to the miniaturized design of the heat exchanger. In other embodiments, the two flat tubes 200 can also be welded.

[0046] Each flat tube 200 can form a flow passage 300 with the inner wall of the outer tube 100. A flow gap is formed between the two flat tubes 200 and the outer tube 100, thereby forming a relatively large flow passage 300 between the two flat tubes 200 and the outer tube 100. Alternatively, the side edges of the two flat tubes 200 are connected to the inner wall of the outer tube 100, thereby forming two independent flow passages 300, and the same or different heat exchange media can flow through the two independent flow passages 300.

[0047] like Figure 5 As shown, in another embodiment of the present invention, two flat tubes 200 are arranged in an intersecting manner in the accommodating channel, and the intersection line of the two flat tubes 200 is consistent with the flow direction of the microchannel 210. A flow passage 300 is formed between the intersecting flat tubes 200 and the inner side wall of the outer tube 100. A flow gap is formed between the two flat tubes 200 and the outer tube 100, thereby forming a relatively large flow passage 300 between the two flat tubes 200 and the outer tube 100. Alternatively, the side edges of the two flat tubes 200 are connected to the inner wall of the outer tube 100, thereby forming four independent flow passages 300, and the same or different heat exchange media can flow through the four independent flow passages 300.

[0048] Or, in one embodiment of the present invention, Figure 8 As shown, the inner tube includes two flat tubes 200. The two flat tubes 200 are arranged at a distance from each other. Through this structural arrangement, the heat exchange area of ​​the two flat tubes 200 can be increased, thereby improving the heat exchange effect.

[0049] According to the embodiments described above, by arranging two flat tubes 200 in the accommodating channel of the outer tube 100, the heat exchange area between different heat exchange media between the inner tube and the outer tube 100 can be further increased, while also meeting the scenario of large refrigerant flow demand, further improving the heat exchange effect.

[0050] In another embodiment of the utility model, the inner tube includes at least three flat tubes 200. The flat tubes 200 are connected to each other to form a polygonal cylindrical structure. The flow passage 300 includes a first channel and a second channel. The first channel is located between each flat tube 200 and the inner side wall of the outer tube 100. The second channel is located in the inner cavity of the polygonal cylindrical structure.

[0051] like Figure 6 and Figure 7 As shown, in this embodiment, the inner tube includes three flat tubes 200. The three flat tubes 200 are connected to each other and together form a triangular cylinder structure. The three sides of the triangular cylinder structure form gaps with the outer tube 100 to form a first channel. The hollow inner cavity of the triangular cylinder structure constitutes a second channel. The first channel and the second channel can also flow the same or different heat exchange media. And for the above embodiment, it is also possible to increase the heat exchange area between different heat exchange media between the inner tube and the outer tube 100, thereby improving the heat exchange efficiency.

[0052] In one embodiment of the present invention, there are multiple flat tubes, and the multiple flat tubes are integrally formed. The integrally formed structure is simple to manufacture and is conducive to the miniaturization design of the heat exchanger. Alternatively, in other embodiments of the present invention, the multiple flat tubes can be welded to each other.

[0053] The embodiment of the second aspect of the utility model provides an air conditioner, comprising the above-mentioned shell and tube heat exchanger for air conditioning.

[0054] Furthermore, in the air conditioner provided by the utility model, since it includes the air-conditioning shell and tube heat exchanger as described above, it also has the advantages as described above.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A shell and tube heat exchanger for air conditioning, characterized in that: include: An outer tube (100), wherein a receiving passage is provided in the outer tube (100); An inner tube, the inner tube being sleeved into the accommodating channel, the inner tube comprising at least one flat tube (200), a flow channel (300) being formed between the at least one flat tube (200) and the outer tube (100), and a plurality of microchannels (210) being provided on each of the flat tubes (200).

2. The air conditioning double-tube heat exchanger according to claim 1, characterized in that: A support member (400) is provided between the at least one flat tube (200) and the outer tube (100).

3. The air conditioning double-tube heat exchanger according to claim 2, characterized in that: The support member (400) is a spiral support plate, one side of the spiral support plate is connected to the at least one flat tube (200), and the other side of the spiral support plate is connected to the inner side wall of the outer tube (100).

4. The air conditioning double-tube heat exchanger according to claim 3, characterized in that: The flow passage (300) is a spiral passage formed between the spiral support plate, the inner side wall of the outer tube (100) and the flat tube (200), and the extension direction of the spiral passage is consistent with the flow direction of the microchannel (210).

5. The air conditioning double-tube heat exchanger according to any one of claims 1 to 4, characterized in that: The inner tube comprises two flat tubes (200), the two flat tubes (200) are at least partially connected to each other, and each flat tube (200) can form the flow passage (300) with the inner side wall of the outer tube (100).

6. The air conditioning double-tube heat exchanger according to claim 5, characterized in that: The two flat tubes (200) are arranged to cross each other in the accommodating channel, and the intersection line of the two flat tubes (200) is consistent with the flow direction of the microchannel (210), and the flow channel (300) is formed between the cross-intersecting flat tubes (200) and the inner side wall of the outer tube (100).

7. The air conditioning double-tube heat exchanger according to any one of claims 1 to 4, characterized in that: The inner tube comprises two flat tubes (200), and the two flat tubes (200) are arranged at a distance from each other.

8. The air conditioning double-tube heat exchanger according to any one of claims 1 to 4, characterized in that: The inner tube comprises at least three flat tubes (200), each of the flat tubes (200) is butted against each other to form a polygonal cylindrical structure, the flow passage (300) comprises a first channel and a second channel, the first channel is located between each of the flat tubes (200) and the inner side wall of the outer tube (100), and the second channel is located in the inner cavity of the polygonal cylindrical structure.

9. The air conditioning double-tube heat exchanger according to claim 1, characterized in that: There are a plurality of the flat tubes (200), and the plurality of the flat tubes (200) are integrally formed.

10. An air conditioner, characterized in that: It comprises the double-tube heat exchanger for air conditioning according to any one of claims 1 to 9.

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