Heat exchanger and air conditioner with fin structure of good strength

Abstract

The utility model belongs to heat exchanger technical field, specifically provides a kind of fin structure good heat exchanger and air conditioner of strength. The utility model aims at solving the problem that the heat exchanger of current difficultly gives consideration to heat exchange efficiency and the structural strength of fin. For this, at least one fin of the heat exchanger of the utility model includes main part and the offset portion located at the windward side of the main part, the offset portion is deviated to the side of the main part in the thickness direction of the main part, the offset portion extends along the length direction of the fin, to increase the structural strength of the windward side of the fin, to overcome the above technical problem.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and specifically provides a heat exchanger and air conditioner with good fin structure strength. Background Technology

[0002] Currently, heat exchangers in air conditioners typically consist of refrigerant pipes and multiple fins. Generally, the fins are simple flat structures with the refrigerant pipes running through them to achieve heat exchange. However, this traditional fin structure has certain drawbacks.

[0003] During air conditioning operation, air flows over the fins at high speed. Since the windward side of the fins directly bears the impact of the airflow, it is prone to deformation over time. This deformation not only affects the fins' own heat exchange efficiency but may also disrupt the airflow distribution inside the heat exchanger, further reducing the overall performance of the air conditioning heat exchanger.

[0004] To address the issue of fin deformation, existing technologies typically increase fin thickness to enhance structural strength. While this improves fin resistance to deformation to some extent, it inevitably increases airflow resistance, reducing the airflow through the heat exchanger and consequently lowering heat exchange efficiency. This fails to meet the demands of high-efficiency air conditioning operation in practical applications. Consequently, it becomes difficult to simultaneously achieve both high heat exchanger efficiency and fin structural strength. Utility Model Content

[0005] One objective of this invention is to solve the problem that existing heat exchangers struggle to balance heat exchange efficiency and fin structural strength.

[0006] To achieve the above objectives, the present invention provides a heat exchanger in a first aspect, comprising:

[0007] refrigerant pipe;

[0008] Multiple fins, at least one of the fins includes a main body and an offset portion located on the windward side of the main body, the offset portion being biased to one side of the main body in the thickness direction, the offset portion extending along the length direction of the fin to increase the structural strength of the windward side of the fin.

[0009] Optionally, the size by which the offset portion deviates from the main body is denoted as δ, and the fin spacing between two adjacent fins is denoted as L. Then δ < L, so as to avoid excessive wind resistance at the junction of the offset portion and the main body.

[0010] Optionally, the main body and the offset portion are of equal thickness, and the thickness of the main body and the offset portion is denoted as S, then S≤δ, so that the turbulent airflow at the junction of the offset portion and the main body adheres to the boundary layer on the surface of the fin.

[0011] Optionally, the offset dimension δ of the offset portion from the main body portion is selected from any value between 0.8 mm and 1.5 mm.

[0012] Optionally, the offset dimension δ of the offset portion from the main body portion is selected from any value between 1.1 mm and 1.5 mm.

[0013] Optionally, the fin further includes at least one row of clamp portions distributed along the length direction of the fin, the clamp portions having through holes through which the refrigerant pipe passes; the width of the offset portion is denoted as K1, and the distance between the offset portion and the nearest row of clamp portions is denoted as K2, then 3%≤K1 / K2≤50%.

[0014] Optionally, the offset portion is parallel to the main body portion; and / or, the offset portion is a flat sheet structure, a corrugated sheet structure, or a dotted sheet structure.

[0015] Optionally, the offset portion is also provided on the leeward side of the main body.

[0016] Optionally, the two offset portions on the windward and leeward sides of the main body are symmetrical with respect to the midpoint of the main body.

[0017] The present invention provides an air conditioner in a second aspect, comprising the heat exchanger described in any one of the first aspects.

[0018] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, by providing an offset portion on the windward side of the fin's main body, and by making the offset portion biased to one side of the main body in the thickness direction, and by extending the offset portion along the length direction of the fin, the structural strength of the fin's windward side is increased without increasing the fin thickness. Therefore, the heat exchanger of this utility model simultaneously achieves both heat exchange efficiency and fin structural strength.

[0019] Those skilled in the art should understand that, because the offset portion is offset relative to the main body, the connection between the offset portion and the main body forms a structure similar to a reinforcing rib, thereby improving the structural strength of the fin's windward side.

[0020] Furthermore, because the offset portion extends along the length of the fin, the junction between the offset portion and the main body can collect and drain condensate generated on the fin, reducing the amount of condensate adhering to the fin and its residence time. This, in turn, reduces the wind resistance caused by the condensate on the fin.

[0021] Furthermore, by making the offset portion deviate from the main body by a size δ smaller than the fin spacing L between two adjacent fins, excessive wind resistance at the junction of the offset portion and the main body is avoided, which would affect the heat exchange efficiency of the heat exchanger and prevent the generation of significant wind noise.

[0022] Furthermore, by making the offset portion deviate from the main body by a dimension δ greater than or equal to the fin thickness, the junction between the offset portion and the main body can disturb the boundary layer of airflow adhering to the fin surface, causing disturbance in the airflow within the boundary layer and reducing its thickness. Those skilled in the art will understand that, due to the high thermal resistance of the boundary layer, this invention can effectively reduce thermal resistance, enhance heat transfer between air and the fin, and thus improve the heat exchange efficiency of the fin.

[0023] Furthermore, by selecting any value from 3% to 50% for the ratio of "width K1 of the offset part" to "distance K2 between the offset part and the nearest column of pipe clamps", the turbulent airflow disturbed at the junction of the offset part and the main body is effectively prevented from impacting the pipe clamps and generating greater wind noise.

[0024] Other beneficial effects of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improvement purpose, features and advantages of this utility model. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, some embodiments of this utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar components or parts in different drawings; the drawings of this utility model are not necessarily drawn to scale. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a heat exchanger provided by this utility model;

[0027] Figure 2 This is a partial top view of the fins in some embodiments of this utility model;

[0028] Figure 3 yes Figure 2 Cross-sectional view of the middle fin along the AA direction (showing two fins)

[0029] Figure 4 yes Figure 3 A diagram showing the portion to the left of the dotted line on one of the fins;

[0030] Figure 5 This is a schematic diagram of an air conditioner provided by this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 001. Heat exchanger;

[0033] 100. Refrigerant pipe;

[0034] 200, Fin; 210, Main body; 220, Offset part; 230, Hoop part; 231, Through hole; 240, Connecting part;

[0035] M, the dividing plane;

[0036] 002, Air conditioner; 300, Indoor unit of air conditioner; 400, Outdoor unit of air conditioner. Detailed Implementation

[0037] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0038] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the corresponding device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. For example, unless otherwise specified, the terms "installation," "connection," "joining," and "fixing" can specifically refer to any feasible connection form such as bolt connection, screw connection, welding, insertion, riveting, fusion welding, or snap-fit.

[0040] Furthermore, it should be noted that in the description of this utility model, mm represents millimeter, cm represents centimeter, and m represents meter.

[0041] Furthermore, it should be noted that in the description of this utility model, the terms "coldness" and "heat" are two descriptions of the same physical state. That is, the higher the "coldness" of a target object (e.g., evaporator, air, condenser, etc.), the lower its "heat," and vice versa. A target object absorbs "coldness" while releasing "heat," and releases "coldness" while absorbing "heat." A target object retains "coldness" or "heat" to maintain its current temperature. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon; that is, a target object (e.g., evaporator) absorbs heat while refrigerating.

[0042] like Figure 1 As shown, the heat exchanger 001 of this utility model includes a refrigerant pipe 100 and multiple fins 200. The refrigerant pipe 100 passes through the multiple fins 200 and is thermally connected to each fin 200. The thermal connection between the refrigerant pipe 100 and the fins 200 specifically involves them contacting each other and being fixed together by means of clamping, welding, etc., so that heat can be transferred between the refrigerant pipe 100 and the fins 200. That is, heat can be conducted from the refrigerant pipe 100 to the fins 200, or from the fins 200 to the refrigerant pipe 100.

[0043] It should be noted that this utility model Figure 1 The heat exchanger 001 shown is intended to illustrate the configuration of the heat exchanger 001 and does not imply that the heat exchanger 001 of this utility model is only of this one form. Those skilled in the art can configure the heat exchanger 001 of this utility model in any other feasible form as needed, such as a V-shaped heat exchanger, a U-shaped heat exchanger, etc. Furthermore, the fins 200 of this utility model can be corrugated fins, flat fins, windowed fins, etc.

[0044] like Figures 2 to 3 As shown, in some embodiments of this utility model, at least one of the plurality of fins 200 includes a main body 210 and a fin located on the windward side of the main body 210 (the airflow direction is as shown in the figure). Figure 2 and Figure 3 The offset portion 220 (indicated by the middle arrow) is biased to one side of the main body 210 in the thickness direction of the main body 210. The offset portion 220 extends along the length direction of the fin 200 to increase the structural strength of the windward side of the fin 200.

[0045] Those skilled in the art will understand that by providing an offset portion 220 on the windward side of the main body 210 of the fin 200, and by making the offset portion 220 biased to one side of the main body 210 in the thickness direction, and by making the offset portion 220 extend along the length direction of the fin 200, the structural strength of the windward side of the fin 200 is increased without increasing the thickness of the fin 200. Therefore, the heat exchanger 001 of this utility model simultaneously achieves both heat exchange efficiency and structural strength of the fin 200.

[0046] Those skilled in the art should understand that, since the offset portion 220 is offset from the main body portion 210, a structure similar to a reinforcing rib is formed at the connection between the offset portion 220 and the main body portion 210, thereby improving the structural strength of the windward side of the fin 200.

[0047] Furthermore, since the offset portion 220 extends along the length of the fin 200, the junction between the offset portion 220 and the main body 210 can collect and drain the condensate generated on the fin 200, reducing the amount of condensate adhering to the fin 200 and its residence time. This reduces the wind resistance caused by the condensate on the fin 200.

[0048] like Figures 2 to 4 As shown, in some embodiments of the present invention, the fin 200 further includes at least one row of clamp portions 230 distributed along the length direction of the fin 200. The clamp portions 230 are provided with through holes 231 through which the refrigerant pipe 100 passes, so that the refrigerant pipe 100 passes through the clamp portions 230.

[0049] Those skilled in the art will understand that the installation of the clamp portion 230 increases the contact area between the fins 200 and the refrigerant pipe 100, thereby improving the heat exchange efficiency between the fins 200 and the refrigerant pipe 100.

[0050] Furthermore, the height P of the clamp portion 230 protruding from the main body portion 210 is less than or equal to the fin spacing L between two adjacent fins 200.

[0051] The film spacing L is selected from any value between 0.8mm and 1.5mm. Specifically, the film spacing L can be any feasible value such as 0.8mm, 0.85mm, 0.87mm, 0.9mm, 0.93mm, 0.97mm, 1.0mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.38mm, 1.4mm, 1.44mm, 1.5mm, etc.

[0052] Furthermore, the spacing L is selected from any value between 1.1mm and 1.5mm, specifically any feasible value such as 1.1mm, 1.13mm, 1.14mm, 1.2mm, 1.26mm, 1.3mm, 1.38mm, 1.4mm, 1.42mm, 1.45mm, 1.48mm, 1.5mm, etc.

[0053] Continue reading Figure 3 and Figure 4 In some embodiments of this utility model, the clamp portion 230 abuts against the adjacent fin 200, thereby limiting the fin spacing L between two adjacent fins 200.

[0054] from Figure 3 and Figure 4 As can be seen, an annular step (not marked in the figure) is formed in the area of ​​the clamp portion 230 near the main body portion 210, and thus a groove is formed at the root of the clamp portion 230 to accommodate the top of another clamp portion 230 (e.g., Figure 3 As shown in the diagram, this design prevents misalignment between adjacent fins 200 in the extension direction of the fins 200, allowing the refrigerant pipe 100 to pass through multiple fins 200 simultaneously. Furthermore, this fit structure also ensures that the height P of the clamp portion 230 protruding from the main body portion 210 is less than the fin spacing L between two adjacent fins 200.

[0055] In other embodiments of this utility model, those skilled in the art may omit the annular step at the root of the clamp portion 230 as needed, so that the height P of the clamp portion 230 protruding from the main body portion 210 is equal to the fin spacing L between two adjacent fins 200.

[0056] like Figure 4 As shown, in some embodiments of this utility model, the width of the offset portion 220 is denoted as K1, and the distance between the offset portion 220 and the nearest column of pipe clamp portions 230 is denoted as K2. Then, 3% ≤ K1 / K2 ≤ 50% to avoid the turbulent airflow from being disturbed at the junction of the offset portion 220 and the main body portion 210 impacting the pipe clamp portion 230 and forming greater wind noise.

[0057] Specifically, K1 / K2 can be any feasible value such as 3%, 5%, 15%, 25%, 29%, 35%, 42%, 47%, 50%, etc.

[0058] like Figure 3 and Figure 4As shown, in some embodiments of this utility model, a connecting portion 240 is provided between the main body 210 and the offset portion 220. The angle between the connecting portion 240 and the main body 210 is an acute angle, and the angle between the connecting portion 240 and the offset portion 220 is also an acute angle, so as to make the main body 210 and the offset portion 220 transition smoothly. In this way, it not only facilitates the processing of the fin 200, but also avoids the airflow from being abruptly disturbed at the junction of the main body 210 and the offset portion 220, which would cause a sharp disturbance to the airflow and generate a large amount of wind noise.

[0059] It should be noted that the connecting part 240 can be as follows: Figure 4 As shown, it can be considered as part of the distance K2 between the offset portion 220 and the nearest column of clamp portions 230; it can also be considered as part of the width K1 of the offset portion 220; or it can exist independently, neither part of K1 nor part of K2.

[0060] like Figure 3 As shown, in some embodiments of this utility model, the size by which the offset portion 220 deviates from the main body portion 210 is denoted as δ, and the distance between two adjacent fins 200 is denoted as L. Then δ < L, so as to avoid excessive wind resistance at the junction of the offset portion 220 and the main body portion 210.

[0061] Those skilled in the art will understand that by making the offset portion 220 deviate from the main body portion 210 by a size δ smaller than the fin spacing L between two adjacent fins 200, excessive wind resistance at the junction of the offset portion 220 and the main body portion 210 is avoided, which would affect the heat exchange efficiency of the heat exchanger 001 and prevent the generation of large wind noise.

[0062] Continue reading Figure 3 The main body 210 and the offset part 220 have the same thickness. Let the thickness of the main body 210 and the offset part 220 be S. Then S≤δ, so that the turbulent airflow at the junction of the offset part 220 and the main body 210 adheres to the boundary layer on the surface of the fin 200.

[0063] Those skilled in the art will understand that by making the offset portion 220 deviate from the main body portion 210 by a size δ greater than or equal to the thickness of the fin 200, the junction between the offset portion 220 and the main body portion 210 can disturb the boundary layer of the airflow adhering to the surface of the fin 200, thereby causing disturbance of the airflow within the boundary layer and reducing the thickness of the boundary layer.

[0064] Those skilled in the art will also understand that, due to the large boundary layer thermal resistance, the present invention can effectively reduce thermal resistance, enhance heat transfer between air and fins 200, and thus improve the heat exchange efficiency of fins 200.

[0065] Furthermore, in some embodiments of this utility model, the dimension δ of the offset portion 220 deviating from the main body portion 210 is selected from any value from 0.8mm to 1.5mm, specifically any feasible value such as 0.8mm, 0.85mm, 0.9mm, 0.97mm, 1.2mm, 1.35mm, 1.46mm, 1.5mm, etc.

[0066] Furthermore, the dimension δ of the offset portion 220 deviating from the main body portion 210 is selected from any value from 1.1mm to 1.5mm, specifically any feasible value such as 1.1mm, 1.15mm, 1.89mm, 1.2mm, 1.35mm, 1.46mm, 1.5mm, etc.

[0067] like Figure 3 and Figure 4 As shown, in some embodiments of this utility model, the offset portion 220 can be parallel to the main body portion 210 to avoid the offset portion 220 causing greater wind resistance to the airflow.

[0068] It should be noted that, although Figures 2 to 4 The offset portion 220 shown is generally a flat sheet structure, but those skilled in the art can also set the offset portion 220 as a corrugated sheet structure or a dotted sheet structure as needed to increase the disturbance effect of the offset portion 220 on the airflow.

[0069] like Figure 2 and Figure 3 As shown, in some embodiments of this utility model, an offset portion 220 is also provided on the leeward side of the main body 210 to increase the structural strength of the leeward side of the fin 200 and to effectively prevent condensate on the fin 200 from being blown out by the airflow.

[0070] Continue reading Figure 2 and Figure 3 In some embodiments of this utility model, the two offset portions 220 on the windward and leeward sides of the main body portion 210 can be symmetrical with respect to the midpoint M of the main body portion 210.

[0071] Go back and refer to Figure 1 In some embodiments of this utility model, the diameter d of the refrigerant pipe 100 can be selected from any value between 5.8 mm and 6.5 mm. Specifically, the pipe diameter d can be any feasible value such as 5.8 mm, 5.85 mm, 5.9 mm, 6.0 mm, 6.01 mm, 6.2 mm, 6.3 mm, and 6.5 mm. Furthermore, the pipe diameter d can be the size of the refrigerant pipe 100 before assembly with the fins 200, or the size after assembly with the fins 200.

[0072] Furthermore, the diameter d of the refrigerant pipe 100 is selected from any value between 5.9mm and 6.2mm, specifically any feasible value such as 5.9mm, 5.95mm, 5.98mm, 6.0mm, 6.03mm, 6.0mm, 6.05mm, 6.08mm, 6.12mm, 6.15mm, 6.2mm, etc.

[0073] like Figure 2 As shown, in some embodiments of this utility model, the pipe spacing H between two adjacent refrigerant pipes 100 on the same fin 200 is selected from any value from 17.1mm to 22.5mm. Specifically, the pipe spacing H can be any feasible value such as 17.1mm, 17.2mm, 17.5mm, 18.1mm, 18.6mm, 19.1mm, 19.55mm, 19.8mm, 20.0mm, 20.3mm, 20.7mm, 20.9mm, 21.3mm, 21.8mm, 22.0mm, 22.35mm, 22.4mm, 22.5mm, etc.

[0074] Continue reading Figure 2 In some embodiments of this utility model, the width W of the fin 200 is selected from any value from 18mm to 23mm, and the fin spacing L between two adjacent fins 200 is selected from any value from 0.8mm to 1.5mm.

[0075] The width W of the fin 200 can be any feasible value such as 18mm, 18.5mm, 19mm, 19.8mm, 20.0mm, 20.5mm, 21.0mm, 21.3mm, 22.0mm, 22.7mm, or 23mm.

[0076] Based on the foregoing description, those skilled in the art will understand that in some embodiments of the present invention, by configuring the offset portion 220 on the fin 200, not only is the structural strength of the fin 200 increased, but also the amount of condensate adhering to the fin 200 and the residence time are reduced, thereby reducing the wind resistance of the condensate to the airflow.

[0077] like Figure 5 As shown, the present invention also provides an air conditioner 002, which includes the heat exchanger 001 described in any of the preceding embodiments.

[0078] The air conditioner 002 of this utility model can be a split-type air conditioner or an integrated air conditioner.

[0079] Among them, split-type air conditioners, such as Figure 5The illustrated unit includes an indoor air conditioning unit 300 and an outdoor air conditioning unit 400. The indoor air conditioning unit 300 can be a wall-mounted air conditioner, a floor-standing air conditioner, a ducted air conditioner, a ceiling-mounted air conditioner, etc. The heat exchanger 001 described in any of the preceding embodiments can be arranged in the indoor air conditioning unit 300 or in the outdoor air conditioning unit 400.

[0080] Among them, the integrated air conditioner can be a window unit.

[0081] The technical solution of this utility model has been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is not limited to these specific embodiments. Without departing from the technical principles of this utility model, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to the relevant technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of this utility model will fall within the protection scope of this utility model.

[0082] Finally, it should be noted that in this invention, the term "connection" refers to fluid communication, allowing fluid (e.g., air, liquid) to flow between two interconnected entities. Furthermore, this "connection" can be either a leak-free flow of fluid between two interconnected entities, or a flow with slight leakage between two interconnected entities.

Claims

1. A heat exchanger, characterized in that, include: refrigerant pipe; Multiple fins, at least one of the fins includes a main body and an offset portion located on the windward side of the main body, the offset portion being biased to one side of the main body in the thickness direction, the offset portion extending along the length direction of the fin to increase the structural strength of the windward side of the fin.

2. The heat exchanger according to claim 1, characterized in that, Let δ denote the size by which the offset portion deviates from the main body, and let L denote the fin spacing between two adjacent fins. Then δ < L, so as to avoid excessive wind resistance at the junction of the offset portion and the main body.

3. The heat exchanger according to claim 2, characterized in that, The main body and the offset part have the same thickness. Let the thickness of the main body and the offset part be S, then S≤δ, so that the turbulent airflow at the junction of the offset part and the main body adheres to the boundary layer on the surface of the fin.

4. The heat exchanger according to claim 2, characterized in that, The offset dimension δ of the offset portion from the main body portion is selected from any value between 0.8 mm and 1.5 mm.

5. The heat exchanger according to claim 4, characterized in that, The offset dimension δ of the offset portion from the main body portion is selected from any value between 1.1 mm and 1.5 mm.

6. The heat exchanger according to claim 1, characterized in that, The fin also includes at least one row of pipe clamps distributed along the length of the fin, and the pipe clamps are provided with through holes through which the refrigerant pipe passes. Let the width of the offset portion be denoted as K1, and the distance between the offset portion and the nearest column of the clamp portion be denoted as K2. Then 3% ≤ K1 / K2 ≤ 50%.

7. The heat exchanger according to claim 1, characterized in that, The offset portion is parallel to the main body portion; and / or The offset section is a flat sheet structure, a corrugated sheet structure, or a convex sheet structure.

8. The heat exchanger according to any one of claims 1 to 7, characterized in that, The offset portion is also provided on the leeward side of the main body.

9. The heat exchanger according to claim 1, characterized in that, The two offset portions on the windward and leeward sides of the main body are symmetrical with respect to the midline of the main body.

10. An air conditioner, characterized in that, The heat exchanger includes any one of claims 1 to 9.

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