Fin structure, heat exchanger and air conditioner

Abstract

The present invention provides a fin structure, a heat exchanger and an air conditioner, wherein the fin structure comprises: a plurality of first fins, which are sequentially and spacedly sleeved on the heat exchange tubes of the heat exchanger along the extension direction of the heat exchange tubes; a plurality of second fins, each of which is sleeved on the heat exchange tubes, and at least one second fin is arranged between any two adjacent first fins; wherein the shape of the second fins can be variably arranged to change the distance between at least part of the second fins and the first fins adjacent thereto. The fin structure of the present invention solves the problem of poor heating effect of the air conditioner in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a fin structure, a heat exchanger and an air conditioner. Background Art

[0002] With the improvement of living standards, air conditioners have become one of the indispensable household appliances.

[0003] However, the air conditioners in the prior art are greatly affected by seasonal environment and geographical location. For example, in areas with extremely low temperature and high humidity, the heating effect of the air conditioner will be greatly reduced due to the thick frost layer on the outdoor unit. In more serious cases, it will cause after-sales complaints from customers or even return of the machine. Summary of the invention

[0004] The main purpose of the present invention is to provide a fin structure, a heat exchanger and an air conditioner to solve the problem of poor heating effect of the air conditioner in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a fin structure is provided, comprising: a plurality of first fins, which are sequentially and spaced apart and sleeved on the heat exchange tubes of the heat exchanger along the extension direction of the heat exchange tubes; a plurality of second fins, each of which is sleeved on the heat exchange tubes, and at least one second fin is arranged between any two adjacent first fins; wherein the shape of the second fin can be variably arranged to change the distance between at least a part of the second fin and the first fin adjacent to it.

[0006] Further, the thickness of the first fin is 0.09mm to 0.095mm; and / or the thickness of the second fin is 0.095mm to 0.1mm; and / or the distance L between two adjacent first fins ranges from 1.2mm to 1.5mm; and / or the ratio of the distance L between two adjacent first fins to the thickness of the second fin is 13 to 16.

[0007] Furthermore, the first fin is a flat plate-like structure perpendicular to the extension direction of the heat exchange tube; the shape of the second fin includes a first shape and a second shape, and the second fin can be switchably arranged between the first shape and the second shape, wherein when the second fin is the first shape, the second fin is a flat plate-like structure parallel to the first fin; when the second fin is the second shape, the second fin includes a first fin portion and a second fin portion, the first fin portion is a tubular structure for being sleeved on the heat exchange tube, and the second fin portion is a flat plate-like structure parallel to the first fin.

[0008] Further, when the second fin is in the first shape, the ratio of the distances L1 and L2 between the second fin and the two adjacent first fins is 1:1; when the second fin is in the second shape, the ratio of the distances L3 and L4 between the second fin portion of the second fin and the two adjacent first fins is 1:12 to 1:10.

[0009] Furthermore, the heat exchange tube is a copper tube; and / or the manufacturing material of the first fin includes aluminum foil material.

[0010] Furthermore, the material of the second fin includes a shape memory alloy, so that the shape of the second fin changes with the change of temperature by virtue of the property of the shape memory alloy of restoring the original shape within a preset temperature range.

[0011] Further, the preset temperature range is -12°C to -15°C.

[0012] Furthermore, the second fin is made of materials including nickel-titanium-niobium and high alloy steel.

[0013] According to a second aspect of the present invention, there is provided a heat exchanger comprising the above-mentioned fin structure.

[0014] According to a third aspect of the present invention, there is provided an air conditioner, comprising a heat exchanger, wherein the heat exchanger is the above-mentioned heat exchanger.

[0015] The technical solution of the present invention is applied, and the fin structure of the present invention includes a plurality of first fins and a plurality of second fins, wherein the plurality of first fins are sequentially spaced and sleeved on the heat exchange tube along the extension direction of the heat exchange tube; each second fin is sleeved on the heat exchange tube, and at least one second fin is arranged between any two adjacent first fins; wherein the shape of the second fin can be variably arranged to change the distance between at least part of the second fin and the first fin adjacent thereto. In this way, by providing a fin structure having first fins and second fins, the structural strength of the fin structure can be improved under the premise of ensuring the production cost, and when the temperature of the heat exchange tube of the condenser of the air conditioner is extremely low, the distance between two adjacent fins of the condenser can be automatically changed without program control to change the air intake volume, thereby solving the problem of a thick frost layer of the condenser of the outdoor unit, improving the heat exchange effect of the heat exchanger, and solving the problem of poor heating effect of the air conditioner in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing the structure of an embodiment of the fin structure according to the present invention at room temperature; and

[0018] Figure 2 Shows Figure 1 The schematic diagram of the structure of the fin structure at ultra-low temperature is shown.

[0019] The above drawings include the following reference numerals:

[0020] 1. first fin; 2. second fin; 21. first fin portion; 22. second fin portion; 3. heat exchange tube. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] like Figure 1 and Figure 2 As shown, the present invention provides a fin structure, comprising: a plurality of first fins 1, which are sequentially and spaced apart and sleeved on the heat exchange tube 3 along the extension direction of the heat exchange tube 3; a plurality of second fins 2, each of the second fins 2 is sleeved on the heat exchange tube 3, and at least one second fin 2 is arranged between any two adjacent first fins 1; wherein the shape of the second fin 2 can be variably arranged to change the distance between at least a portion of the second fin 2 and the first fin 1 adjacent thereto.

[0023] The fin structure of the present invention comprises a plurality of first fins 1 and a plurality of second fins 2, wherein the plurality of first fins 1 are sequentially spaced and sleeved on the heat exchange tube 3 along the extension direction of the heat exchange tube 3; each second fin 2 is sleeved on the heat exchange tube 3, and at least one second fin 2 is arranged between any two adjacent first fins 1; wherein the shape of the second fin 2 can be variably arranged to change the distance between at least a portion of the second fin 2 and the first fin 1 adjacent thereto. In this way, by providing the fin structure with the first fin 1 and the second fin 2, the structural strength of the fin structure can be improved under the premise of ensuring the production cost, and when the temperature of the heat exchange tube of the condenser of the air conditioner is extremely low, the distance between two adjacent fins of the condenser can be automatically changed without program control to change the air intake, thereby solving the problem of a thick frost layer of the condenser of the outdoor unit, improving the heat exchange effect of the heat exchanger, and solving the problem of poor heating effect of the air conditioner in the prior art.

[0024] Preferably, one second fin 2 is disposed between any two adjacent first fins 1 , and one first fin 1 is disposed between any two adjacent second fins 2 .

[0025] Among them, the thickness of the first fin 1 is 0.09mm to 0.095mm; and / or the thickness of the second fin 2 is 0.095mm to 0.1mm; and / or the distance L between two adjacent first fins 1 ranges from 1.2mm to 1.5mm; and / or the ratio of the distance L between two adjacent first fins 1 to the thickness of the second fin 2 is 13 to 16.

[0026] like Figure 1 and Figure 2 As shown, the first fin 1 is a flat plate structure perpendicular to the extension direction of the heat exchange tube 3; the shape of the second fin 2 includes a first shape and a second shape, and the second fin 2 can be switchably set between the first shape and the second shape, wherein when the second fin 2 is the first shape, the second fin 2 is a flat plate structure parallel to the first fin 1; when the second fin 2 is the second shape, the second fin 2 includes a first fin portion 21 and a second fin portion 22, the first fin portion 21 is a tubular structure for being sleeved on the heat exchange tube 3, the second fin portion 22 is a flat plate structure parallel to the first fin 1, the first end of the first fin portion 21 remains stationary at the position where the original first shape is located, the second end of the first fin portion 21 is located at the first end and is close to one of the first fins 1 adjacent thereto, and the second fin portion 22 is located at the second end of the first fin portion 21, so that the distance between the second fin portion 22 and one of the first fins 1 adjacent thereto is reduced as much as possible, and the distance between the second fin portion 22 and another first fin 1 adjacent thereto is increased as much as possible, so as to increase the air intake.

[0027] Specifically, when the second fin 2 is in the first shape, the ratio of the distances L1 and L2 between the second fin 2 and the two adjacent first fins 1 is 1:1; when the second fin 2 is in the second shape, the ratio of the distances L3 and L4 between the second fin portion 22 of the second fin 2 and the two adjacent first fins 1 is in the range of 1:12 to 1:10.

[0028] In at least one embodiment of the present invention, the heat exchange tube 3 is a copper tube.

[0029] In at least one embodiment of the present invention, the material of the first fin 1 includes aluminum foil material.

[0030] Specifically, the second fin 2 is made of a material including a shape memory alloy, so that the second fin 2 can switch between the first shape and the second shape as the temperature changes due to the property of the shape memory alloy of restoring the original shape within a preset temperature range.

[0031] Among them, the shape of the first fin 1 is a circular ring, the first shape of the second fin 2 is a circular ring with the same shape as the first fin 1, and the second shape of the second fin 2 is a shape formed by bending the circular ring in the radial direction; first, the second fin 2 is produced into a second shape within a preset temperature range, and is assembled with the first fin 1 and the heat exchange tube 3 within this preset temperature range, and then the assembled components are placed at room temperature, so that the second fin 2 can be switched to the first shape with the same shape as the first fin 1.

[0032] Among them, the preset temperature range is -12℃ to -15℃.

[0033] The second fin 2 is made of materials including nickel, titanium, niobium and high alloy steel.

[0034] Specifically, the manufacturing material of the second fin 2 is composed of nickel-titanium-niobium Ni47Ti44Nb9 with a molar content of 82% to 88%, high-alloy steel with a molar content of 10%, and other trace elements.

[0035] Since the fins need to be deformed and restored many times under heating conditions, adding 10% of high-alloy steel to the shape memory alloy material can, on the one hand, enhance the strength and ductility of the second fin 2 to increase the service life of the second fin 2 and reduce the probability of the second fin 2 inverting (collapse and deformation) during transportation; on the other hand, within the normal operating temperature range of the air conditioner, the thermal conductivity of the high-alloy steel will increase with the increase of the temperature of the external environment, that is, the thermal conductivity of the second fin 2 will increase with the increase of the temperature of the external environment, thereby improving the heat exchange effect of the heat exchanger and increasing the cooling capacity of the air conditioner in a high temperature environment.

[0036] The present invention provides a heat exchanger, comprising the above-mentioned fin structure.

[0037] The present invention also provides an air conditioner, comprising a heat exchanger, wherein the heat exchanger is the above-mentioned heat exchanger, wherein the above-mentioned heat exchanger is installed in an outdoor unit of the air conditioner to serve as a condenser of the outdoor unit.

[0038] When the outdoor unit of the air conditioner is heated for about 20 minutes in an environment with an external environment of 0℃ / RH80% or lower, a layer of frost about 5 mm thick will begin to form on the outer surface of the condenser. At this time, the temperature of the heat exchange tube 3 is close to the deformation temperature of the second fin 2 (-12℃ to -15℃). However, since the temperature of the heat exchange tube 3 will be 2℃ higher than the original temperature after being transferred to the second fin 2, the second fin 2 has not yet deformed and the heating capacity of the condenser has not yet begun to decline.

[0039] As the frost layer thickens, when the temperature of the heat exchange tube 3 reaches -14℃~-17℃, the temperature of the second fin 2 will reach -12℃ to -15℃, and the second fin 2 will begin to deform from the heat exchange tube 3. The deformation can be completed within 3S~5S. Figure 1 The first shape shown to Figure 2 The switching to the second shape shown in the figure; wherein, the mechanical deformation of the second fin 2 can break the force between the frost molecules, so that most of the frost automatically falls from the condenser to the chassis; since the time required for the second fin 2 to switch its shape is relatively short, when the second fin 2 is switched to the second shape, the distance between the second fin portion 22 of the second fin 2 and a first fin 1 adjacent thereto is reduced to close to zero, and the distance between the second fin portion 22 of the second fin 2 and another first fin 1 adjacent thereto is increased as much as possible, thereby sharply increasing the air volume of the outdoor unit's fan. At this time, the larger air intake volume and the slight increase in the temperature of the heat exchange tube 3 can basically remove 90% of the frost layer on the condenser.

[0040] Within 1 to 2 minutes after the frost layer on the condenser is removed, the temperature of the heat exchange tube 3 will rise to a point where the second fin 2 switches back to the first shape.

[0041] In this way, the shape of the second fin 2 automatically repeats the above-mentioned switching action as the temperature of the heat exchange tube 3 changes, so that the condenser of the outdoor unit remains basically frost-free. The ultra-low temperature heating effect of the air conditioner can be improved by more than 30% compared with the models in the prior art with the same configuration except for the fin structure.

[0042] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0043] The fin structure of the present invention comprises a plurality of first fins 1 and a plurality of second fins 2, wherein the plurality of first fins 1 are sequentially spaced and sleeved on the heat exchange tube 3 along the extension direction of the heat exchange tube 3; each second fin 2 is sleeved on the heat exchange tube 3, and at least one second fin 2 is arranged between any two adjacent first fins 1; wherein the shape of the second fin 2 can be variably arranged to change the distance between at least a portion of the second fin 2 and the first fin 1 adjacent thereto. In this way, by providing the fin structure with the first fin 1 and the second fin 2, the structural strength of the fin structure can be improved under the premise of ensuring the production cost, and when the temperature of the heat exchange tube of the condenser of the air conditioner is extremely low, the distance between two adjacent fins of the condenser can be automatically changed without program control to change the air intake, thereby solving the problem of a thick frost layer of the condenser of the outdoor unit, improving the heat exchange effect of the heat exchanger, and solving the problem of poor heating effect of the air conditioner in the prior art.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fin structure, characterized in that: include: A plurality of first fins (1) are sequentially and spaced apart from each other on the heat exchange tube (3) along the extension direction of the heat exchange tube (3); a plurality of second fins (2), each of the second fins (2) being sleeved on the heat exchange tube (3), and at least one of the second fins (2) being arranged between any two adjacent first fins (1); The shape of the second fin (2) is variably arranged so as to change the distance between at least a portion of the second fin (2) and the first fin (1) adjacent thereto; The first fin (1) is a flat plate structure perpendicular to the extension direction of the heat exchange tube (3); the shape of the second fin (2) includes a first shape and a second shape, and the second fin (2) can be set switchably between the first shape and the second shape, wherein: When the second fin (2) is in the first shape, the second fin (2) is a flat plate structure parallel to the first fin (1); When the second fin (2) is in the second shape, the second fin (2) comprises a first fin portion (21) and a second fin portion (22), the first fin portion (21) being a tubular structure for being sleeved on the heat exchange tube (3), and the second fin portion (22) being a flat plate structure parallel to the first fin (1).

2. The fin structure according to claim 1, characterized in that: The thickness of the first fin (1) is 0.09 mm to 0.095 mm; and / or The thickness of the second fin (2) is 0.095 mm to 0.1 mm; and / or The distance L between two adjacent first fins (1) ranges from 1.2 mm to 1.5 mm; and / or The ratio of the distance L between two adjacent first fins (1) to the thickness of the second fin (2) is 13 to 16.

3. The fin structure according to claim 1, characterized in that: When the second fin (2) is in the first shape, the ratio of the distances L1 and L2 between the second fin (2) and the two adjacent first fins (1) is 1:1; When the second fin (2) is in the second shape, the ratio of the distances L3 and L4 between the second fin portion (22) of the second fin (2) and the two adjacent first fins (1) is 1:12 to 1:

10.

4. The fin structure according to claim 1, characterized in that: The heat exchange tube (3) is a copper tube; and / or The first fin (1) is made of a material comprising aluminum foil.

5. The fin structure according to claim 1, characterized in that: The material used to make the second fin (2) includes a shape memory alloy, so that the shape of the second fin (2) changes with temperature due to the property of the shape memory alloy of restoring its original shape within a preset temperature range.

6. The fin structure according to claim 5, characterized in that: The preset temperature range is -12°C to -15°C.

7. The fin structure according to claim 5, characterized in that: The second fin (2) is made of materials including nickel, titanium, niobium and high alloy steel.

8. A heat exchanger, characterized in that: The invention comprises the fin structure according to any one of claims 1 to 7.

9. An air conditioner, comprising a heat exchanger, characterized in that: The heat exchanger is the heat exchanger according to claim 8.

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