Heat exchange assembly and heat exchanger

Abstract

The utility model discloses a heat exchange assembly and a heat exchanger, and relates to the field of heat exchangers, the heat exchange assembly comprises a plurality of flat pipes and a plurality of fins arranged among the flat pipes, the length directions of the flat pipes are consistent, the fins are arranged between every two adjacent flat pipes, and the fins are arranged between the flat pipes. The multiple fins are arranged at intervals in the length direction of the flat pipes, the two sides of each fin are fixed to the corresponding flat pipes respectively, trough parts and crest parts which are alternately arranged are distributed on the fins, and drainage grooves of the fins are formed by the trough parts; the fins are provided with air inlet ends and air outlet ends, the air inlet ends and the air outlet ends are located at the two opposite ends of the flat pipes in the width direction, and the drainage grooves extend from the air inlet ends to the air outlet ends. And an included angle is formed between the groove line of the drainage groove and the width direction of the flat pipe. The heat exchanger has the advantages of being convenient to discharge condensate water and good in heat exchange effect.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchange component and a heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] A microchannel heat exchanger is a heat exchanger with multiple microchannels in a flat tube. It has made great progress in replacing condensers in single-cooling products, but its application in heat pump air conditioners is still very rare and is still in the research stage. The main reason is that the condensed water in the microchannel heat exchanger in the related technology is not easy to discharge, resulting in frequent frost and defrosting of the outdoor heat exchanger during the winter heating process, which seriously affects the heating effect of the air conditioner.

[0004] In the related technology, the fins of the microchannel heat exchanger are placed in a direction that is perpendicular to the flat tubes. When the flat tubes are horizontal, they hinder the downward flow of condensed water. When the flat tubes are placed vertically, the fins are placed horizontally, and the tension between the fins and the condensed water is small. In addition, the surface roughness of the microchannel heat exchanger after brazing is large, and the contact angle with the condensed water is large, so drainage is very difficult. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a heat exchange component and a heat exchanger, which have the advantages of convenient condensed water discharge and good heat exchange effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A heat exchange component comprises a plurality of flat tubes and a plurality of fins arranged between the flat tubes, wherein the length directions of the plurality of flat tubes are consistent, and the plurality of fins are arranged between two adjacent flat tubes, and the plurality of fins are arranged at intervals along the length direction of the flat tubes and the two sides of the fins are respectively fixed to the corresponding flat tubes, and the fins are provided with troughs and crests arranged alternately, and the troughs constitute drainage grooves of the fins; the fins have an air inlet end and an air outlet end, and the air inlet end and the air outlet end are located at opposite ends of the flat tube in the width direction, and the drainage groove extends from the air inlet end to the air outlet end; and the groove line of the drainage groove forms an angle with the width direction of the flat tube.

[0008] In the present application, the heat exchange assembly includes a flat tube and a plurality of fins arranged between the flat tubes. The flat tubes carry a heat transfer medium. The fins are used to transfer heat and improve the heat exchange efficiency. The cooling air is blown from the air inlet end of the fin to the air outlet end to transfer the heat of the flat tube. When the heat exchange assembly is applied to an indoor evaporator, the refrigerant in the flat tube evaporates, and the moisture in the outside air environment condenses and precipitates on the surface of the fin and the flat tube; when used as a heat pump condenser, a large amount of defrosted water accumulates between the fins after heating and defrosting. In the present application, the fins are provided with alternating troughs and crests, wherein the troughs constitute drainage grooves. The condensed water in the crests slides down to the troughs with lower terrain under the action of gravity, and finally the condensed water on the fins is collected in the drainage grooves formed by the troughs. The groove line of the drainage groove has an angle with the width direction of the flat tube, that is, the drainage groove is inclined relative to the flat tube, and the length of the drainage groove is greater than its projected length along the width direction of the flat tube. Compared with the straight groove in the related art, the length of the drainage groove in the present application is increased, the heat exchange path becomes longer, and the heat exchange efficiency is improved. Under the action of wind, condensed water can be discharged in time through the drainage groove, which reduces wind resistance, reduces the impact of condensed water or defrosted water on the heat exchange efficiency of the fins, ensures the continuous heat exchange capacity of the heat exchange component, maintains the reliability of the operation of the cooling and heating system, and avoids condensed water and defrosted water from accumulating on the fins to hinder air flow and bring additional heat transfer resistance. In addition, the heat exchange component improves the heat exchange performance and the energy efficiency ratio of the whole machine of the heat exchanger, so the overall size of the heat exchanger can be correspondingly reduced, and the cost is greatly reduced.

[0009] Optionally, the angle between the groove line of the drainage groove and the width direction of the flat tube is at least 10° to 45°.

[0010] Optionally, a single trough portion and a single crest portion constitute a corrugation, and the number of the corrugations on each fin is at least two.

[0011] Optionally, the drainage groove includes a plurality of bent sections connected in sequence, and adjacent bent sections are symmetrically arranged with respect to a plane parallel to the thickness direction of the flat tube.

[0012] Optionally, a side of the bending section close to the air inlet end is higher than a side of the bending section close to the air outlet end, and a terminal end of the bending section close to the air inlet end is higher than a terminal end of the bending section close to the air outlet end.

[0013] Optionally, the groove line of the drainage groove is a straight line and is flush with the trough portion of the same fin.

[0014] Optionally, in the fins, the longest drainage groove has a length greater than a width of the flat tube.

[0015] Optionally, a groove line of the drainage groove is a straight line, and a side of the drainage groove close to the air inlet end is higher than a side of the drainage groove close to the air outlet end.

[0016] Optionally, one end of the fin at the air inlet end extends beyond the side of the flat tube at the air inlet end, and one end of the fin at the air outlet end extends beyond the side of the flat tube at the air outlet end.

[0017] In addition, the utility model also provides a heat exchanger, including a header and a heat exchange assembly, wherein the header is connected to the flat tubes in the heat exchange assembly, and the heat exchange assembly includes the aforementioned heat exchange assembly. The reasoning process of the beneficial effects of the heat exchanger provided by the utility model and the aforementioned heat exchange assembly is similar, and will not be repeated here.

[0018] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure in the embodiment of the utility model;

[0021] Figure 2 for Figure 1 A top view of

[0022] Figure 3 for Figure 1 Explosion diagram of

[0023] Figure 4 This is a schematic structural diagram of another embodiment of the utility model;

[0024] Figure 5 for Figure 4 A top view of

[0025] Figure 6 This is a structural schematic diagram of another embodiment of the utility model;

[0026] Figure 7 for Figure 6 Top view of the .

[0027] Among them, 1. flat tube; 2. fin; 21. trough; 22. crest; 23. air inlet; 24. air outlet; 25. drainage groove; 251. bending section; 26. slot. DETAILED DESCRIPTION

[0028] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0029] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0030] Example:

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a heat exchange component, including a plurality of flat tubes 1 and a plurality of fins 2 arranged between the flat tubes 1, the length directions of the plurality of flat tubes 1 are consistent, a plurality of fins 2 are arranged between two adjacent flat tubes 1, the plurality of fins 2 are arranged at intervals along the length direction of the flat tubes 1, and the two sides of the fins 2 are respectively fixed to the corresponding flat tubes 1, and the fins 2 are provided with alternately arranged troughs 21 and crests 22, and the troughs 21 constitute drainage grooves 25 of the fins 2; the fins 2 have an air inlet end 23 and an air outlet end 24, the air inlet end 23 and the air outlet end 24 are located at opposite ends of the flat tube 1 along the width direction, and the drainage groove 25 extends from the air inlet end 23 to the air outlet end 24; the groove line of the drainage groove 25 forms an angle with the width direction of the flat tube 1.

[0032] The heat exchange assembly includes a flat tube 1 and a plurality of fins 2 arranged between the flat tubes 1. The plurality of fins 2 are repeatedly arranged along the length direction of the flat tube 1. The number of repetitions depends on the total length of the flat tube 1 and is actually adjusted according to the design of the product. The two sides of the fin 2 are respectively fixed to the corresponding flat tube 1. In this embodiment, a plurality of slots 26 are provided on the fin 2. The flat tubes 1 are respectively inserted into the corresponding slots 26 to connect the fin 2 and the flat tube 1. The slots 26 are provided at the air outlet end 24 of the fin 2 and extend to the air inlet end 23. The air outlet end 24 is provided with a device for conveying wind force such as a fan. The slots 26 of the plurality of fins 2 are arranged oppositely. The fin 2 is provided with alternately arranged crests 22 and troughs 21. Liquids such as condensed water or defrosted water slide from the crests 22 to the troughs 21, and then leave the fin 2 from the air outlet end 24 under the action of wind force, so as to avoid condensed water and defrosted water accumulating on the fin 2 and hindering air flow, thereby improving heat exchange efficiency. The trough 21 forms the drainage groove 25 of the fin 2 due to its lower terrain. The groove line of the drainage groove 25 has an angle with the width direction of the flat tube 1, that is, the drainage groove 25 is inclined relative to the flat tube 1. The length of the drainage groove 25 is greater than its projected length along the width direction of the flat tube 1. Compared with the straight groove in the related art, the drainage groove 25 in the present application is longer, the heat exchange path is longer, and the heat exchange efficiency is improved. The extension of the path of the drainage groove 25 realizes a significant increase in the effective heat exchange area (the area in contact with the medium) without increasing the density of the fin 2. The heat exchange efficiency and energy efficiency ratio are greatly improved by using the same material, and the weather resistance and anti-blocking performance are excellent, the stability and reliability are further enhanced, and the maintenance cycle is greatly extended. It should be noted that the groove line of the drainage groove 25 refers to the line at the bottom of the drainage groove 25, which represents the direction of the drainage groove.

[0033] In addition, the present application adopts the corrugated fin 2 formed by bending the flat plate. After the fin 2 is bent, the heat exchange area of ​​the fin 2 is increased, so that the distance between the two fins 2 in the up and down directions can be appropriately increased, which is further beneficial to the discharge of condensed water and defrost water, and can reduce wind resistance and improve heat exchange efficiency.

[0034] The angle between the groove line of the drainage groove 25 and the width direction of the flat tube 1 is at least 10° to 45°.

[0035] In this embodiment, the angle between the groove line of the drainage groove 25 and the width direction of the flat tube 1 is 10°. In other embodiments, the angle between the groove line of the drainage groove 25 and the width direction of the flat tube 1 should be greater than 10°. If the angle between the groove line of the drainage groove 25 and the width direction of the flat tube 1 is too small, the heat exchange path will be too short and the heat exchange efficiency will be low; of course, if the angle between the groove line of the drainage groove 25 and the width direction of the flat tube 1 is too large, it will be difficult for the accumulated water to be discharged from the fin 2.

[0036] A single trough portion 21 and a single crest portion 22 constitute a corrugation, and the number of corrugations on each fin 2 is at least two.

[0037] The folding and bending of multiple corrugations can also increase the heat exchange area and further optimize the performance of the heat exchanger. The corrugations can disturb the air and enhance the heat exchange effect. Therefore, the number of corrugations should be at least two to achieve the purpose of optimizing drainage.

[0038] The drainage groove 25 includes a plurality of bent sections 251 connected in sequence, and adjacent bent sections 251 are symmetrically arranged with respect to a plane parallel to the thickness direction of the flat tube 1 .

[0039] In this embodiment, adjacent bending sections 251 are symmetrically arranged along the thickness direction of the flat tube 1 to form a tortuous drainage groove 25. Compared with the straight drainage groove 25 in the related art, the tortuous drainage groove 25 in this embodiment has a longer travel path for condensed water and cold air and a larger heat exchange area.

[0040] The side of the bending section 251 close to the air inlet end 23 is higher than the side of the bending section 251 close to the air outlet end 24 , and the end of the bending section 251 close to the air inlet end 23 is higher than the end of the bending section 251 close to the air outlet end 24 .

[0041] In this embodiment, the side of the bending section 251 close to the air inlet end 23 is slightly higher than the side of the bending section 251 close to the air outlet end 24 so that the bending section 251 is constructed as a slope, so that the condensed water can slide smoothly to the air outlet end 24 with the help of gravity. The end of the bending section 251 close to the air inlet end 23 is higher than the end of the bending section 251 close to the air outlet end 24 so that the condensed water can smoothly enter the next bending section 251. In this embodiment, two connected bending sections 251 are provided, the width of the flat tube 1 is W, and the flat tube 1 has a middle area with a size of 1 / 2W along the width direction, and the end point of the first bending section 251 (along the air inlet direction) and the starting point of the second bending section 251 are both located in the middle area. In fact, when the number of bending sections 251 is more, this structure is also applicable, that is, the end point of the previous bending section 251 and the starting point of the next connected bending section 251 are both located in the middle area with a size of 1 / 2W.

[0042] like Figure 4 and Figure 5 As shown, in other embodiments, the groove line of the drainage groove 25 is a straight line, and the troughs 21 of the same fin 2 are flush.

[0043] In this structure, the drainage grooves 25 are arranged perpendicular to the flat tubes 1 on both sides, that is, the groove lines of the drainage grooves 25 are all located in the same horizontal plane, and the straight drainage grooves 25 are arranged obliquely relative to the width direction of the flat tubes 1. For the flat tubes 1 of the same width, the length of the obliquely arranged straight drainage grooves 25 is greater than the drainage grooves 25 parallel to the width direction of the flat tubes 1, that is, the heat exchange path is extended, the heat exchange efficiency is improved, and the heat exchange area is increased.

[0044] In the fin 2 , the longest drainage groove 25 has a length greater than the width of the flat tube 1 .

[0045] The orthographic projection lengths of at least two drainage grooves 25 on the side wall of the flat tube 1 satisfy the following relationship:

[0046] L≥W / 2

[0047] Wherein, L is the length of the orthographic projection of the groove line of the drainage groove 25 on the side wall of the flat tube 1 , and W is the width of the flat tube 1 .

[0048] When the drainage grooves 25 are all arranged in parallel, the angle between each drainage groove 25 and the width direction of the flat tube 1 is consistent. L is the length of the positive projection of the groove line of the drainage groove 25 on the side wall of the flat tube 1. When the angles are consistent, L also represents the length of each groove line. At least two groove lines satisfy L≥W / 2, that is, at least two drainage grooves 25 are relatively long, which is conducive to improving the heat exchange efficiency.

[0049] like Figure 6 and Figure 7 As shown, in other embodiments, the groove line of the drainage groove 25 is a straight line, and the side of the drainage groove 25 close to the air inlet end 23 is higher than the side of the drainage groove 25 close to the air outlet end 24.

[0050] In this structure, the straight drainage groove 25 is tilted downward relative to the width direction of the flat tube 1, which is more conducive to drainage, guiding the condensed water to be discharged downward, improving the drainage effect, reducing the heat exchange resistance and ensuring the original heat exchange area of ​​the heat exchanger.

[0051] The width of the trough portion 21 is consistent with that of the peak portion 22, and the thickness of the flat tube 1 satisfies the following relationship:

[0052] T≤R / (n-1)

[0053] Wherein, T is the thickness of the flat tube 1 , R is the distance between adjacent flat tubes 1 , and n is the sum of the number of the wave crests 22 and the wave troughs 21 .

[0054] The thickness of the flat tube 1 is related to the placement distance between adjacent flat tubes 1 and the number of corrugations. If the thickness of the flat tube 1 is too large, the heat transfer efficiency will be affected and a large space will be occupied, which is inconvenient during installation.

[0055] When implementing this solution, the airflow direction in the heat exchange component is generally perpendicular to the gravity direction. However, it is also possible to flip the heat exchange component 90° so that the gravity direction is consistent with the airflow direction. In this case, only a very small wind speed is needed as an auxiliary to drain the condensate. The specific usage scenario can be selected by the user according to actual needs.

[0056] This embodiment also provides a heat exchanger, including a header and a heat exchange component, the header is connected to the flat tubes in the heat exchange component, and the heat exchange component includes the aforementioned heat exchange component.

[0057] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A heat exchange component, comprising a plurality of flat tubes (1) and a plurality of fins (2) arranged between the flat tubes (1), wherein the length directions of the plurality of flat tubes (1) are consistent, a plurality of fins (2) are arranged between two adjacent flat tubes (1), the plurality of fins (2) are arranged at intervals along the length direction of the flat tubes (1) and the two sides of the fins (2) are respectively fixed to the corresponding flat tubes (1), characterized in that: The fin (2) is provided with wave troughs (21) and wave crests (22) arranged alternately, the wave troughs (21) forming drainage grooves (25) of the fin (2); the fin (2) has an air inlet end (23) and an air outlet end (24), the air inlet end (23) and the air outlet end (24) being located at two opposite ends of the flat tube (1) along the width direction, the drainage groove (25) extending from the air inlet end (23) to the air outlet end (24); the groove line of the drainage groove (25) forms an angle with the width direction of the flat tube (1).

2. The heat exchange assembly according to claim 1, characterized in that: The angle between the groove line of the drainage groove (25) and the width direction of the flat tube (1) is 10° to 45°.

3. The heat exchange assembly according to claim 1, characterized in that: A single trough portion (21) and a single crest portion (22) constitute a corrugation, and the number of the corrugations on each fin (2) is at least two.

4. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The drainage groove (25) comprises a plurality of bent sections (251) connected in sequence, and adjacent bent sections (251) are symmetrically arranged with respect to a plane parallel to the thickness direction of the flat tube (1).

5. The heat exchange assembly according to claim 4, characterized in that: A side of the bending section (251) close to the air inlet end (23) is higher than a side of the bending section (251) close to the air outlet end (24); and an end of the bending section (251) close to the air inlet end (23) is higher than an end of the bending section (251) close to the air outlet end (24).

6. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The groove line of the drainage groove (25) is a straight line, and is flush with the trough portion (21) of the same fin (2).

7. The heat exchange assembly according to claim 6, characterized in that: In the fin (2), the longest drainage groove (25) has a length greater than the width of the flat tube (1).

8. The heat exchange assembly according to any one of claims 1 to 3, characterized in that: The groove line of the drainage groove (25) is a straight line, and the side of the drainage groove (25) close to the air inlet end (23) is higher than the side of the drainage groove (25) close to the air outlet end (24).

9. The heat exchange assembly according to claim 8, characterized in that: One end of the fin (2) located at the air inlet end (23) extends beyond the side surface of the flat tube (1) located at the air inlet end (23), and one end of the fin (2) located at the air outlet end (24) extends beyond the side surface of the flat tube (1) located at the air outlet end (24).

10. A heat exchanger, comprising a header and a heat exchange assembly, wherein the header is connected to a flat tube in the heat exchange assembly, characterized in that: The heat exchange component comprises the heat exchange component according to any one of claims 1 to 9.

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