Heat exchanger and heat exchange equipment
By using aluminum or aluminum alloy materials and optimizing the structure of U-tubes and fins, the problems of high cost and poor performance of existing heat exchangers are solved, and cost reduction and heat exchange performance are improved, achieving similar effects to copper heat exchangers.
Patent Information
- Application Number
- CN202420433713.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-06
AI Technical Summary
Existing heat exchangers have problems with high cost and poor heat exchange performance, especially because of the high price of copper and the thermal conductivity of aluminum that is not as good as copper, resulting in poor overall performance.
Aluminum or aluminum alloy is used as the material of U-tubes and fins, and by optimizing the outer diameter, pipe spacing and total number of U-tubes, the heat exchange area of U-tubes and fins is increased, thereby increasing the heat exchange area on the refrigerant side and air side.
It has achieved cost reduction and improved heat exchange performance, made up for the heat exchange loss caused by insufficient thermal conductivity of aluminum, and reached a performance level similar to that of copper heat exchangers.
Smart Images
Figure CN222635270U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, and in particular to a heat exchanger and heat exchange equipment. Background Art
[0002] Both air conditioners and dehumidifiers have heat exchangers to achieve corresponding temperature regulation and dehumidification functions.
[0003] Existing heat exchangers generally have more copper structures, and the price of copper is relatively high, resulting in a higher overall cost of the heat exchanger. Currently, there are some heat exchangers that have replaced part or all of the copper structure with an aluminum structure. Since aluminum is cheaper than copper, it can save costs, but the thermal conductivity of aluminum is not as good as copper, resulting in poor heat transfer performance of these heat exchangers that simply change the material. Utility Model Content
[0004] The utility model aims to provide a heat exchanger and a heat exchange device to alleviate the technical problems of high cost and poor heat exchange performance of the heat exchanger in the prior art.
[0005] The heat exchanger provided by the utility model comprises a U-tube and fins.
[0006] The fins are connected to the U-tubes, and the U-tubes and the fins are made of aluminum or aluminum alloy; the U-tubes are arranged in several rows and there are multiple U-tubes in each row, the total number of the U-tubes is 22 to 26, the outer diameter of the U-tubes is 4.7 to 5.5 mm, and the tube pitch of the U-tubes is 13.5 to 19.5 mm.
[0007] Compared with the prior art, the beneficial effects of the utility model are:
[0008] The heat exchanger provided by the utility model uses aluminum or aluminum alloy as the material of the U-tube and the fin, which can achieve cost reduction compared with the solution of using copper or copper alloy as the material of the U-tube and the fin; by reducing the outer diameter of the U-tube from the original 7mm to 4.7-5.5mm, reducing the tube distance of the U-tube from about 20.5mm to 13.5-19.5mm, and correspondingly increasing the total number of U-tubes from 12 to 22-26, the heat exchange area of the U-tube and the heat exchange area of the fin can be significantly increased, and the heat exchange area on the refrigerant side and the heat exchange area on the air side can be significantly increased accordingly, which makes up for the heat exchange loss caused by the poor thermal conductivity of the U-tube and the fin made of aluminum or aluminum alloy, and improves the heat exchange effect.
[0009] Therefore, the heat exchanger provided by the utility model not only has low cost but also has better heat exchange performance.
[0010] Preferably, as an implementable embodiment, the total number of the U-tubes is 24; and / or the outer diameter of the U-tube is 5 mm; and / or the tube pitch of the U-tube is 14.5 mm.
[0011] The beneficial effect is that the cost and heat exchange performance can be better balanced, and the impact on the structural layout of the heat exchanger can be reduced.
[0012] Preferably, as an implementable embodiment, the U-tubes are arranged in three rows, the number of the U-tubes in any two rows is equal, and the U-tubes in two adjacent rows are arranged in a staggered manner.
[0013] The beneficial effect is that cost and heat exchange performance can be better balanced.
[0014] Preferably, as an implementable embodiment, the U-tube is an internally threaded aluminum tube; and / or the U-tube is a 3 series zinc-sprayed aluminum tube.
[0015] The beneficial effect is that the heat exchange effect on the refrigerant side, the corrosion resistance of the U-tube and the reliability of the whole machine can be improved.
[0016] Preferably, as an implementation method, the fins are arranged in several rows, one row of the fins corresponds to one row of the U-tubes, the number of the fins in each row is multiple and they are arranged in parallel and at intervals along the length direction of the U-tubes, and the multiple U-tubes in any row of the U-tubes are inserted into each of the fins in the corresponding row of the fins.
[0017] The beneficial effect is that the heat exchange performance of the U-tube and the fin can be fully utilized.
[0018] Preferably, as an implementable embodiment, the fin has a width of 11 to 18 mm;
[0019] And / or, the fin pitch is 1.1-1.5 mm.
[0020] The beneficial effect is that the cost and heat exchange performance of the fins can be balanced and a good heat dissipation effect can be obtained.
[0021] Preferably, as an implementable embodiment, the fin has a width of 12.56 mm;
[0022] And / or, the fin pitch is 1.2 mm.
[0023] The beneficial effect is that the cost and heat exchange performance of the fins can be balanced and a good heat dissipation effect can be obtained.
[0024] Preferably, as an implementable embodiment, the type of the fin is a hydrophilic window fin, a corrugated fin or a bridge fin;
[0025] And / or, the fin is made of aluminum foil.
[0026] The beneficial effect is that the heat exchange performance of the fins can be improved.
[0027] Preferably, as an implementable embodiment, the thickness of the aluminum foil is 0.075 to 0.2 mm.
[0028] The beneficial effect is that the fins can obtain good heat exchange performance.
[0029] Preferably, as an implementable embodiment, the heat exchanger further includes a side plate, the side plate is connected to the U-tube, the side plate is used to be fixedly connected to the structure fixing the heat exchanger, and the side plate is an aluminum plate.
[0030] The beneficial effect is that the heat exchanger and other structures can be relatively fixed.
[0031] Preferably, as an implementable embodiment, the side plate is a 3 series aluminum plate or a 5 series aluminum plate;
[0032] And / or, the thickness of the side plate is 0.8-1.3 mm.
[0033] The beneficial effect is that a good fixing effect can be obtained.
[0034] The utility model also provides a heat exchange device, the heat exchange device comprises the heat exchanger, and the heat exchange device is an air conditioner or a dehumidifier.
[0035] The heat exchange equipment provided by the utility model has all the advantages of the above heat exchanger due to the above heat exchanger, and not only has a lower cost but also has a better heat exchange performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0037] Figure 1 A schematic diagram of the side structure of a heat exchanger provided in an embodiment of the utility model;
[0038] Figure 2 A schematic diagram of the side view structure of the heat exchanger provided by an embodiment of the utility model from another perspective;
[0039] Figure 3 A schematic diagram of the front view structure of a heat exchanger provided in an embodiment of the utility model;
[0040] Figure 4 A schematic top view of the structure of a heat exchanger provided in an embodiment of the utility model.
[0041] Description of reference numerals:
[0042] 1-U tube; 2-side panel. DETAILED DESCRIPTION
[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0044] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.
[0045] See also Figure 1-Figure 4 This embodiment provides a heat exchanger, which includes a U-tube 1 and a fin; the fin is connected to the U-tube 1, and the material of the U-tube 1 and the fin is aluminum or aluminum alloy; the U-tube 1 is arranged in a plurality of rows and the number of U-tubes 1 in each row is multiple, the total number of U-tubes 1 is 22 to 26, the outer diameter a of the U-tube 1 is 4.7 to 5.5 mm, and the tube distance b of the U-tube 1 is 13.5 to 19.5 mm. The tube distance b of the U-tube 1 is the distance between the center lines of the two straight tubes on both sides of the U-shape of the U-tube 1.
[0046] The heat exchanger provided in this embodiment uses aluminum or aluminum alloy as the material of the U-tube 1 and the fins, which can achieve cost reduction compared with the solution of using copper or copper alloy as the material of the U-tube 1 and the fins; by reducing the outer diameter a of the U-tube 1 from the original 7mm to 4.7-5.5mm, reducing the tube distance b of the U-tube 1 from about 20.5mm to 13.5-19.5mm, and correspondingly increasing the total number of U-tubes 1 from 12 to 22-26, the heat exchange area of the U-tube 1 and the heat exchange area of the fins can be significantly increased, and the heat exchange area on the refrigerant side and the heat exchange area on the air side can be significantly increased accordingly, compensating for the heat exchange loss caused by the poor thermal conductivity of the U-tube 1 and the fins made of aluminum or aluminum alloy, and improving the heat exchange effect.
[0047] Therefore, the heat exchanger provided in this embodiment not only has a low cost but also has a better heat exchange performance.
[0048] Preferably, the total number of U-tubes 1 can be set to 24, the outer diameter a of the U-tube 1 can be set to 5 mm, and the tube distance b of the U-tube 1 can be set to 12.5 mm, which can better balance the cost and heat exchange performance.
[0049] Furthermore, the U-tubes 1 can be arranged in three rows, the number of U-tubes in any two rows of U-tubes 1 can be set to be equal, and the U-tubes 1 in two adjacent rows of U-tubes 1 can be arranged alternately, which is equivalent to 8 U-tubes 1 in each row of U-tubes 1. Compared with a heat exchanger with 2 rows and a total of 12 U-tubes 1 with an outer diameter of 7 mm and a tube pitch of 20.5 mm, the length and width of the cross section perpendicular to the length direction of the U-tube 1 change less, which is convenient for reducing the impact on the structural layout of the heat exchanger.
[0050] Preferably, the U-tube 1 can be set as an internally threaded aluminum tube to increase the heat exchange area of the U-tube 1 and improve the heat exchange effect on the refrigerant side.
[0051] Furthermore, the U tube 1 can be set as a 3-series zinc-sprayed aluminum tube, and zinc spraying on the surface can improve the corrosion resistance and reliability of the entire machine of the U tube 1. Specifically, the material of the U tube 1 can be 3003 grade aluminum alloy.
[0052] Specifically, the fins can be arranged in several rows, and one row of fins corresponds to one row of U-tubes 1, the number of fins in each row of fins can be set to multiple, and multiple fins in the same row can be arranged in parallel and spaced apart along the length direction of the U-tubes 1, and multiple U-tubes 1 in any row of U-tubes 1 can be inserted into each fin in the corresponding row of fins to give full play to the heat exchange performance of the U-tubes 1 and the fins.
[0053] Preferably, the fin width c can be set to 11-18 mm to balance the cost and heat exchange performance of the fin. Specifically, the fin width c can be set to 12.56 mm. If there are more than two rows of fins, the center distance between the two connected rows of fins is consistent with the fin width.
[0054] Preferably, the fin pitch can be set to 1.1-1.5 mm to obtain a good heat dissipation effect. Specifically, the fin pitch can be set to 1.2 mm.
[0055] The type of the fins can be hydrophilic window fins, corrugated fins or bridge fins.
[0056] The material of the fins can be set to aluminum foil to improve the heat exchange performance of the fins. The thickness of the aluminum foil can be 0.075-0.2 mm, preferably 0.094 mm, so that the fins can obtain good heat exchange performance.
[0057] The height d of the heat exchanger can be set to 246.5 mm.
[0058] In the specific structure of the heat exchanger provided in this embodiment, a side plate 2 can also be provided, the side plate 2 is connected to the U-tube 1, and the side plate 2 is fixed to the structure for fixing the heat exchanger, so that the heat exchanger can be relatively fixed with other structures, wherein the side plate 2 is an aluminum plate, ensuring that the heat exchanger is an all-aluminum structure (including aluminum alloy).
[0059] In fact, the side plate 2 and the fins are arranged parallel to each other.
[0060] The side plate 2 may be one and disposed on one side of the heat exchanger; or two side plates 2 may be two and disposed on both sides of the heat exchanger respectively. In this case, all the fins are sandwiched between the two side plates 2 .
[0061] Preferably, the side panel 2 can be set to a 3 series aluminum plate or a 5 series aluminum plate, wherein the 5 series aluminum plate has higher corrosion resistance than the 3 series aluminum plate, and different grades of aluminum plates can be selected according to different usage scenarios. When the 3 series aluminum plate is selected, the side panel 2 can be processed by a 3003 grade aluminum alloy; when the 5 series aluminum plate is selected, the side panel 2 can be processed by a 5050 grade aluminum alloy.
[0062] Furthermore, the thickness of the side plate 2 can be set to 0.8-1.3 mm to obtain a good fixing effect. Specifically, the thickness of the side plate 2 can be set to 1.0 mm.
[0063] Specifically, the U-tube 1 can be interference-fitted with the fins and the side plates 2 through a tube expansion process, and the U-tube 1 can be inserted straight or obliquely.
[0064] The distance e between the two side plates 2 of the heat exchanger can be designed according to the size of the heat exchanger shell and the heat exchange requirement. The distance f from the end face of the expanded side of the heat exchanger to the adjacent side plate and the distance g from the part of the U-shaped bottom of the U-tube 1 to the adjacent side plate can be processed according to the process requirements.
[0065] By optimizing the flow path, air volume and other measures, the heat exchanger provided in this embodiment can achieve the effect of a copper heat exchanger.
[0066] In the following table, Scheme 1 and Scheme 2 are comparative examples, and Scheme 3 is a specific example of the heat exchanger provided in this embodiment. The materials of the U tube 1 and the fins in the three schemes are the same. As can be seen from the table below, Scheme 1 only changes the material. Because the wall thickness of the aluminum tube is higher than that of the copper internal threaded tube, the heat exchange area on the refrigerant side is reduced, and the theoretical heat exchange capacity cannot reach the heat exchange capacity of the copper heat exchanger; Scheme 2, on the basis of changing the material, reduces the diameter of the U tube 1 from φ7 to φ5, and the heat exchange area is improved overall, but due to the difference in material thermal conductivity and the increase in the pressure drop of the U tube 1, the heat exchange capacity still cannot reach the heat exchange capacity of the copper heat exchanger; Scheme 3, that is, the heat exchanger provided in this embodiment, compared with the copper heat exchanger, the heat exchange area on the refrigerant side can be increased by about 30%, the heat exchange area on the air side can be increased by about 55%, the total cost can be reduced by about 16 yuan, and the heat exchange capacity is slightly higher by about 3%.
[0067]
[0068] This embodiment also provides a heat exchange device, which includes the above-mentioned heat exchanger. The heat exchange device can be an air conditioner or a dehumidifier.
[0069] The heat exchange device provided in this embodiment has all the advantages of the above-mentioned heat exchanger, and not only has a lower cost, but also has a better heat exchange performance.
[0070] The heat exchanger provided in this embodiment can be combined with other aluminum elbows, aluminum tube groups, four-way valves, compressors, and throttling devices to form an entire air conditioner.
[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A heat exchanger, characterized in that: It comprises a U tube (1) and fins; The fins are connected to the U-tubes (1), and the U-tubes (1) and the fins are made of aluminum or aluminum alloy; the U-tubes (1) are arranged in a plurality of rows, and the number of the U-tubes (1) in each row is a plurality, the total number of the U-tubes (1) is 22 to 26, the outer diameter of the U-tubes (1) is 4.7 to 5.5 mm, and the tube pitch of the U-tubes (1) is 13.5 to 19.5 mm.
2. The heat exchanger according to claim 1, characterized in that: The total number of the U-tubes (1) is 24; and / or the outer diameter of the U-tubes (1) is 5 mm; and / or the tube pitch of the U-tubes (1) is 14.5 mm; And / or, the U-tubes (1) are arranged in three rows, the number of the U-tubes (1) in any two rows is equal, and the U-tubes (1) in two adjacent rows are arranged in a staggered manner; And / or, the U-tube (1) is an internally threaded aluminum tube; and / or, the U-tube (1) is a 3 series zinc-sprayed aluminum tube.
3. The heat exchanger according to claim 1, characterized in that: The fins are arranged in a plurality of rows, one row of the fins corresponding to one row of the U-tubes (1), the number of the fins in each row is multiple and they are arranged in parallel and at intervals along the length direction of the U-tubes (1), and the plurality of the U-tubes (1) in any row of the U-tubes (1) are inserted into each of the fins in the corresponding row of the fins.
4. The heat exchanger according to claim 3, characterized in that: The fin has a width of 11 to 18 mm; And / or, the fin pitch is 1.1-1.5 mm.
5. The heat exchanger according to claim 4, characterized in that: The fin has a width of 12.56 mm; And / or, the fin pitch is 1.2 mm.
6. The heat exchanger according to claim 1, characterized in that: The type of the fin is a hydrophilic window fin, a corrugated fin or a bridge fin; And / or, the fin is made of aluminum foil.
7. The heat exchanger according to claim 6, characterized in that The thickness of the aluminum foil is 0.075-0.2 mm.
8. The heat exchanger according to any one of claims 1 to 7, characterized in that: The heat exchanger further comprises a side plate (2), the side plate (2) being connected to the U-tube (1), the side plate (2) being used for being fixedly connected to a structure for fixing the heat exchanger, and the side plate (2) being an aluminum plate.
9. The heat exchanger according to claim 8, characterized in that The side plate (2) is a 3 series aluminum plate or a 5 series aluminum plate; And / or, the thickness of the side plate (2) is 0.8-1.3 mm.
10. A heat exchange device, characterized in that: The heat exchange device comprises the heat exchanger according to any one of claims 1 to 9, and the heat exchange device is an air conditioner or a dehumidifier.