Heat exchanger and heat exchange system

Abstract

The utility model provides a heat exchanger and a heat exchange system, the heat exchanger comprises fins and at least two heat exchange tube rows, each heat exchange tube row comprises a plurality of heat exchange tubes arranged in the length direction of the fins at intervals, each heat exchange tube is provided with a plurality of channels, and the channels extend in the length direction of the heat exchange tubes and penetrate through the end faces of the two sides of the heat exchange tubes; the multiple channels are arranged in the width direction of the heat exchange pipes at intervals, the heat exchange pipes penetrate through the fins, the side, located on the upstream of the wind direction, of the heat exchanger in the working state is the windward side, and the side, located on the downstream of the wind direction, of the heat exchanger is the leeward side. The first channel is closer to the windward side than other channels except the first channel, the second channel is closer to the leeward side than other channels except the second channel, and the circulation sectional area of the first channel is larger than that of the second channel. Due to the fact that the quantities of refrigerants flowing in the two adjacent heat exchange channels are different, the temperature difference between the first channel and the second channel is large, and the heat exchange performance of the heat exchanger is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, specifically to a heat exchanger and heat exchange system applied in the field of air conditioning. Background Technology

[0002] In related technologies, heat exchangers include fins and heat exchange tubes, with the heat exchange tubes penetrating the fins. In some designs, multiple rows of heat exchange tubes are used to improve the heat exchange capacity of the heat exchanger in order to adapt to the heat exchange performance within a specific space. Multiple heat exchange tubes are spaced apart along the width of the fins. When the heat exchanger is in operation, a heat exchange medium flows inside the heat exchange tubes, and the heat exchange medium exchanges heat with the air. How to further improve the overall heat exchange performance of multi-row heat exchangers is a technical problem that engineers need to consider. Utility Model Content

[0003] The purpose of this application is to provide a heat exchanger and a heat exchange system that can improve the heat exchange efficiency of the heat exchanger.

[0004] To this end, the first aspect of this application provides a heat exchanger comprising at least two heat exchange tube banks and fins. The at least two heat exchange tube banks are spaced apart in the width direction of the fins. Each heat exchange tube bank includes a plurality of heat exchange tubes spaced apart in the length direction of the fins. Each heat exchange tube has a plurality of channels extending along the length direction of the heat exchange tube and penetrating both end faces of the heat exchange tube. The plurality of channels are spaced apart in the direction from the windward side to the leeward side of the heat exchange tube. The heat exchange tubes penetrate the fins. The side of the heat exchanger located upstream in the wind direction during operation is defined as the windward side, and the side located downstream in the wind direction is defined as the leeward side. The plurality of channels includes a first channel and a second channel. The first channel is closer to the windward side than other channels except the first channel, and the second channel is closer to the leeward side than other channels except the second channel. The flow cross-sectional area of ​​the first channel is larger than the flow cross-sectional area of ​​the second channel.

[0005] According to the heat exchanger proposed in this application, the heat exchange tube includes a first channel and a second channel. The flow cross-sectional area of ​​the first channel is larger than that of the second channel. The heat exchange medium flowing through the first channel can be more than that flowing through the second channel. Two heat exchange tubes are arranged adjacent to each other in the fin width direction. The second channel of one of the heat exchange tubes is relatively close to the first channel of the other heat exchange tube. There are also some fins between the first channel and the second channel. Since the amount of refrigerant flowing in the two adjacent heat exchange channels is different, the temperature difference between the first channel and some fins and between the second channel and some fins is large, which is beneficial to improving the heat exchange performance of the heat exchanger.

[0006] A second aspect of this application provides a heat exchange system comprising a compressor, a first heat exchanger, a flow regulating valve, and a second heat exchanger. A first interface of the compressor is connected to the first heat exchanger, the first heat exchanger is connected to a first interface of the flow regulating valve, a second interface of the flow regulating valve is connected to the second heat exchanger, and the second heat exchanger is connected to a second interface of the compressor. At least one of the first heat exchanger and the second heat exchanger is a heat exchanger as described above.

[0007] According to the heat exchange system proposed in this application, the heat exchange system compressor, first heat exchanger, flow regulating valve and second heat exchanger, since the heat exchange performance of the first heat exchanger and / or the second heat exchanger is improved in the heat exchange system, it is beneficial to improve the heat exchange performance of the heat exchange system. Attached Figure Description

[0008] Figure 1 A schematic diagram of the heat exchanger in one specific embodiment is shown;

[0009] Figure 2 A schematic diagram of the heat exchanger in another specific embodiment is shown;

[0010] Figure 3 This is a cross-sectional schematic diagram of the heat exchange tube provided in this application in one specific embodiment;

[0011] Figure 4 This is a cross-sectional schematic diagram of the heat exchange tube provided in this application in another specific embodiment;

[0012] Figure 5 This is a cross-sectional schematic diagram of the heat exchange tube provided in this application in yet another specific embodiment;

[0013] Figure 6 To and Figure 3-5 The diagram shows a structural schematic of the heat exchanger tube phase-adapted fins in one specific embodiment.

[0014] Figure 7 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0015] Figure 8 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0016] Figure 9 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0017] Figure 10 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0018] Figure 11This is a schematic diagram of the structure of the fins provided in this application in another specific embodiment;

[0019] Figure 12 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0020] Figure 13 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0021] Figure 14 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0022] Figure 15 This is a schematic diagram of the structure of the fins provided in this application in yet another specific embodiment;

[0023] Figure 16 for Figure 15 A magnified view of part I in the middle section;

[0024] Figure 17 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0025] Figure 18 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0026] Figure 19 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment;

[0027] Figure 20 This is a schematic diagram of the structure of the fins provided in this application in yet another specific embodiment;

[0028] Figure 21 A schematic diagram of a heat exchanger provided in this application

[0029] Figure 22 for Figure 21 Sectional view along axis AA;

[0030] Figure 23 This is a schematic diagram of a specific embodiment of the heat exchange system provided in this application.

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

[0032] 100. Heat exchanger; 1. First heat exchange tube bank; 2. Second heat exchange tube bank; 3. Fins; 4. Third heat exchange tube bank; 5. Fourth heat exchange tube bank; 11. First heat exchange tube; 21. Second heat exchange tube; 41. Third heat exchange tube; 51. Fifth heat exchange tube; 6. Connecting pipe;

[0033] 111, Limiting part; 111a, First line segment; 112a, Second line segment; 113a, First channel; 113b, Second channel; 113c, Third channel;

[0034] 31. Mounting part; 33. First wall part; 34. Second wall part; 35. Protrusion;

[0035] 200, Second heat exchanger; 300, Compressor; 301, First port of compressor; 302, Second port of compressor; 400, Flow control valve; 401, First port of flow control valve; 402, Second port of flow control valve. Detailed Implementation

[0036] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] This application provides a heat exchanger that can be used in a heat exchange system. The description uses an example of a heat exchanger used in an air conditioning system, where either the first heat exchanger or the second heat exchanger in the system can be the heat exchanger described below.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of heat exchanger 100 in one specific embodiment is shown. Figure 2 A schematic diagram of the structure of heat exchanger 100 in another specific embodiment is shown. The heat exchanger 100 includes multiple heat exchange tube rows and multiple fins 3. The multiple heat exchange tube rows include a first heat exchange tube row 1 and a second heat exchange tube row 2. The first heat exchange tube row 1 and the second heat exchange tube row 2 are spaced apart in the width direction of the fins 3. The first heat exchange tube row 1 includes multiple first heat exchange tubes 11. The multiple first heat exchange tubes 11 are spaced apart in the length direction X of the fins 3. The first heat exchange tubes 11 have channels penetrating through both end faces of the first heat exchange tubes 11 for heat exchange medium flow. The multiple first heat exchange tubes 11 are spaced apart in the length direction of the fins 3. The second heat exchange tube row 2 includes multiple second heat exchange tubes 21. The multiple second heat exchange tubes 21 are spaced apart in the length direction of the fins 3. The second heat exchange tubes 21 have channels penetrating through both end faces of the second heat exchange tubes 21 for heat exchange medium flow. The first heat exchange tubes 11 and the second heat exchange tubes 21 are arranged through the fins. A portion of the fins 3 is provided between the first heat exchange tubes 11 and the second heat exchange tubes 21. Heat exchanger 100 may include one or more heat exchange tube banks 1. Figure 1 In the embodiment shown, the heat exchanger 100 includes two heat exchange tube banks 1, namely the first heat exchange tube bank 1 and the second heat exchange tube bank 2. Figure 2In the illustrated embodiment, the heat exchanger 100 includes four heat exchange tube banks, namely a first heat exchange tube bank 1, a second heat exchange tube bank 2, a third heat exchange tube bank 4, and a fourth heat exchange tube bank 5. This application does not specify the number of heat exchange tube banks 1.

[0039] The following description uses heat exchanger 100, which includes two heat exchange tube banks, as an example.

[0040] like Figure 1 and Figure 2 When the heat exchanger 100 shown is working, the heat exchange medium flows through the channels of the heat exchange tube 11, and the outside air flows along... Figure 1 and Figure 2 The air flows in the direction indicated by the middle arrow through the gap between adjacent fins 3, thereby allowing the outside air to come into contact with the outer wall of the heat exchange tube 11 and exchange heat. The side of the heat exchanger 100 located upstream in the wind direction during operation is defined as the windward side, and the side located downstream in the wind direction is defined as the leeward side. Figure 1 and Figure 2 In the illustrated embodiment, the arrows indicate the direction in which outside air flows from the windward side to the leeward side.

[0041] It should be noted that the directions discussed in this article are defined based on the direction of fin 3. Figure 1 and Figure 2 Taking the shown perspective as an example, the length direction of fin 3 is the X direction, the width direction of fin 3 is the Y direction, and the thickness direction of fin 3 is the Z direction. Among these, the length direction X, width direction Y, and thickness direction Z of fin 3 are mutually perpendicular. The directions mentioned below will be referred to as... Figure 1 and Figure 2 The directions shown are consistent.

[0042] Please continue to refer to this. Figure 3 , Figure 3 This is a cross-sectional schematic diagram of the heat exchange tube 11 provided in this application in a specific embodiment. The heat exchange tube 11 has two or more channels penetrating both end faces of the heat exchange tube 11. The two or more channels include at least a first channel 113a and a second channel 113b. The first channel 113a and the second channel 113b are spaced apart in the width direction Y of the fin 3. The first channel 113a is closer to the windward side than other channels except the first channel 113a, and the second channel 113b is closer to the leeward side than other channels except the second channel 113b. Figure 3 In the embodiment shown, the heat exchange tube 11 includes two channels, namely a first channel 113a and a second channel 113b, and the outside air flows along... Figure 3 The flow is indicated by the arrows, with the first channel 113a closer to the windward side and the second channel 113b closer to the leeward side.

[0043] Specifically, such as Figure 1 As shown in this embodiment of the first pipe bank 1, the flow cross-sectional area of ​​the first channel 113a is larger than that of the second channel 113b. The first channel 113a can carry more heat exchange medium than the second channel 113b, resulting in more heat exchange medium on the windward side than on the leeward side. Since the air on the windward side has just entered the heat exchanger 100, the temperature difference between the air on the windward side and the heat exchange medium on the windward side is greater than the temperature difference between the air on the leeward side and the heat exchange medium on the leeward side. When there is more heat exchange medium on the windward side than on the leeward side, the heat exchange efficiency of the heat exchanger 100 on the windward side can be fully utilized, thereby improving the heat exchange efficiency of the heat exchanger 100 on the windward side. The temperature difference between the air on the leeward side and the heat exchange medium on the leeward side is small. When the heat exchange medium on the leeward side is less than that on the windward side, the heat exchange medium can fully exchange heat on the windward side. This avoids the heat exchange medium being underutilized due to excessive heat exchange medium on the leeward side but insufficient heat exchange, thus reducing heat exchange medium waste, improving the consistency of the outlet state of heat exchanger 100, and improving the operational stability of heat exchanger 100.

[0044] Figure 3 In the illustrated embodiment, the cross-sectional shape of the first channel 113a and the second channel 113b is circular. In some embodiments, the cross-sectional shape of the first channel 113a and the second channel 113b can also be any shape such as square, triangle, ellipse, or irregular. The cross-sectional shapes of the first channel 113a and the second channel 113b can be the same or different, as long as the flow cross-sectional area of ​​the first channel 113a is greater than the flow cross-sectional area of ​​the second channel 113b.

[0045] In one specific embodiment, please refer to Figure 4 and Figure 5 , Figure 4 A cross-sectional schematic diagram of the heat exchange tube 11 provided in this application in another specific embodiment; Figure 5 This is a cross-sectional schematic diagram of the heat exchange tube provided in another specific embodiment of this application. A third channel 113c is further provided between the first channel 113a and the second channel 113b. The flow cross-sectional area of ​​the first channel 113a is S1, the flow cross-sectional area of ​​the second channel 113b is S2, and the flow cross-sectional area of ​​the third channel 113c is S3, satisfying: S1 ≥ S2 > S3. That is, the flow cross-sectional areas of the first channel 113a, the third channel 113c, and the second channel 113b can gradually decrease, or the flow cross-sectional area of ​​the first channel 113a can be the same as that of the third channel 113c, and the flow cross-sectional area of ​​the second channel 113b is smaller than the flow cross-sectional areas of the first channel 113a and the third channel 113c.

[0046] In some embodiments, the flow cross-sectional area S1 of the first channel 113a, the flow cross-sectional area S2 of the second channel 113b, and the flow cross-sectional area S3 of the third channel 113c satisfy: S1≥S3>S2 or S1>S3≥S2. That is, the flow cross-sectional areas of the first channel 113a, the third channel 113c, and the second channel 113b can gradually decrease, or the flow cross-sectional area of ​​the second channel 113b can be the same as the flow cross-sectional area of ​​the third channel 113c, and both the flow cross-sectional areas of the second channel 113b and the third channel 113c are smaller than the flow cross-sectional area of ​​the first channel 113a.

[0047] In some embodiments, such as Figure 1 and Figure 2 As shown, the first heat exchange tube 11 and the second heat exchange tube 12 have the same structure. The first heat exchange tube 11 and the second heat exchange tube 12 include a first channel 113a and a second channel 113b. The flow cross-sectional area of ​​the first channel 113a is larger than that of the second channel 113b. More heat exchange medium can flow through the first channel 113a than through the second channel 113b. Two heat exchange tubes are arranged adjacent to each other in the fin width direction. The second channel 113b of one of the heat exchange tubes 11 is close to the first channel 113a of the other heat exchange tube 12. The amount of refrigerant flowing in the two adjacent heat exchange channels is different. The temperature difference between the first channel 113a and part of the fins 3 and between the second channel 113b and the part of the fins 3 is large, which can improve the heat exchange performance of the heat exchanger 100.

[0048] like Figure 4 In the embodiment shown, the cross-section of the first channel 113a is part of a circle, the cross-section of the second channel 113b is triangular, and the cross-section of the third channel 113c is a trapezoidal structure. Figure 5 In the illustrated embodiment, the cross-sections of the first channel 113a and the second channel 113b are both partial circles, and the cross-section of the third channel 113c is similar to a trapezoid. Of course, the cross-sectional shapes of the above three channels can also be any other arbitrary shapes, and this application does not specifically limit the shape of the channels.

[0049] The specific structure of the limiting part 111 will be described in detail below.

[0050] The heat exchange tube 11 includes a limiting part 111. The heat exchange tube 11 has a cross-section perpendicular to the length direction of the heat exchange tube 11. On the cross-section of the heat exchange tube 11, the heat exchange tube 11 has an outer contour line. The outer contour line of the limiting part 11 is a first line segment 111a. The outer contour line includes the first line segment 111a and also includes a second line segment 112a. The second line segment 112a is an arc segment. One end of the second line segment 112a is connected to one end of the first line segment 111a, and the other end of the second line segment 112a is connected to the other end of the first line segment 111a. The length of the second line segment 112a is greater than the length of the first line segment 111a. The first line segment 111a includes at least one of curve, arc, straight line, and broken line.

[0051] In some embodiments, such as Figure 3-5 As shown, the heat exchange tube 11 includes a limiting portion 111, which protrudes towards the leeward side. The outline of the limiting portion 111 is a broken line, and at least a portion of the limiting portion 111 is located on the leeward side. The outer contour of the heat exchange tube 11 formed by the limiting portion 111 and the body portion 116 is non-circular. The limiting portion prevents the heat exchange tube from rotating, thus affecting the relative position of the first channel 113a and the second channel 113b. Since a heat exchange tube without the limiting portion 111 is a circular tube, providing the limiting portion 111 reduces the risk of rotation, minimizes the negative impact on the heat exchanger's performance, and improves the reliability of the heat exchanger.

[0052] On the other hand, in some embodiments, the maximum dimension of the limiting part 111 in the length direction X of the fin 3 is smaller than the maximum dimension of the heat exchange tube in the length direction X of the fin 3. This arrangement can break the boundary layer at the outer wall of the heat exchange tube 11 when the air flows through it, so that the air can not only fully contact the heat exchange tube on the windward side, but also fully contact the limiting part 111 on the leeward side, thereby increasing the heat exchange area of ​​the heat exchange tube and thus improving the heat exchange efficiency, especially the heat exchange efficiency on the leeward side.

[0053] Figure 3 In the illustrated embodiment, the second outer contour line 111a of the limiting portion 111 has a dimension L along the length direction X of the fin 3. L gradually decreases from the windward side to the leeward side, meaning the maximum dimension L1 of the second outer contour line 111a along the length direction X of the fin 3 is the height of the limiting portion 111. In this embodiment, the limiting portion 111 has a conical structure and protrudes towards the leeward side, thereby increasing the contact area between the limiting portion 111 and the outside air and improving the heat exchange efficiency of the heat exchange tube 11 on the leeward side.

[0054] In one specific embodiment, such as Figure 4The outer contour of the heat exchange tube 11 includes a second line segment 112a, which has a central angle α, where 190°≤α≤220°. For example, the central angle α of the second line segment 112a can be 190°, 195°, 200°, 215°, 220°, etc. Typically, the central angle of the second line segment 112a is greater than 180°, which facilitates the setting of a first channel 113a with a larger flow cross-sectional area on the windward side of the heat exchange tube. Furthermore, the longer perimeter of the second line segment 112a increases the contact area between the heat exchange tube and the outside air, improving the heat exchange efficiency of the heat exchange tube 11 on the windward side and ensuring full utilization of the heat exchange medium.

[0055] When the outer contour of the limiting part 111 is a combination of one or more of a straight line, an arc, or a polyline, the second line segment 112a and the first line segment 111a will not form a complete circle, thereby ensuring that the limiting part 111 can prevent the heat exchange tube 11 from being installed backwards. For example, when the first line segment 111a is an arc, the radii of the arcs of the second line segment 112a and the first line segment 111a are different, and they will not form a complete circle.

[0056] Please refer to Figure 6 , Figure 6 To and Figure 3-5 The diagram shows a schematic representation of the structure of the fins 3 adapted to the heat exchange tube 11 in one specific embodiment. The fins 3 include a plurality of mounting portions 21 for mounting the heat exchange tubes, and these mounting portions 21 are spaced apart along the length direction X of the fins 3. In this embodiment, the fins 3 include two rows of mounting portions 21, thereby enabling the mounting of two rows of heat exchange tubes. In some embodiments, the fins 3 may further include one row or two or more rows of mounting portions 21; this application does not specifically limit this aspect.

[0057] like Figure 6 In the illustrated embodiment, the mounting portion 21 is a through hole penetrating the fin 3 along the thickness direction, and the sidewall of the mounting portion 21 includes a first wall portion 23 and a second wall portion 24. When the heat exchanger 100 is in operation, the first wall portion 23 is located on the side closer to the windward side, and the second wall portion 24 is located on the side closer to the leeward side. The outer contour of the first wall portion 23 is adapted to the second line segment 112a, and the second wall portion 24 is adapted to the outer contour 111a of the limiting portion 111.

[0058] When the limiting part 111 is installed on one side of the first wall part 23 and the heat exchange tube 116 is installed on one side of the second wall part 24, the heat exchange tube 11 cannot be installed. Only when the limiting part 111 is installed on one side of the second wall part 24 and the heat exchange tube 116 is installed on one side of the first wall part 23 can the heat exchange tube 11 be installed. Figure 3-5 In the embodiment shown, the heat exchange tube 11 is installed at Figure 6The mounting portion 21 is shown. In addition, when the second outer contour 111a of the limiting portion 111 mates with the contour of the second wall portion 24, the relative rotation between the two can be restricted, thereby restricting the rotation of the heat exchange tube 11 relative to the fins 3 and improving the reliability of the heat exchange tube 11 installation.

[0059] The following section describes in detail other heat exchanger tube structures and the fins on which the heat exchanger tube is mounted.

[0060] Please refer to Figure 7-11 , Figure 7 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 8 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 9 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 10 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 11 This is a schematic diagram of the structure of the fins provided in this application in another specific embodiment.

[0061] Figure 7-10 In the embodiment shown, the heat exchange tube 11 includes, in addition to the first channel 113a and the second channel 113b, one or more third channels 113c located between the first channel 113a and the second channel 113b.

[0062] like Figure 7 In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The cross-sectional shape of the first channel 113a, the third channel 113c, and the second channel 113b are all circular. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0063] Figure 8 In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a and the second channel 113b are both partially circular channels, and the third channel 113c is an approximately trapezoidal channel. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0064] Figure 9In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a is a partially circular channel, the third channel 113c is an approximately trapezoidal channel, and the second channel 113b is a rectangular channel. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0065] Figure 10 In the illustrated embodiment, the heat exchange tube 11 has two or more first channels 113a and two or more third channels 113c. In this embodiment, the two or more first channels 113a are spaced apart circumferentially along the heat exchange tube 116, and at least a portion of the two or more second channels 113b are also spaced apart circumferentially along the heat exchange tube 116. The sum of the flow cross-sectional areas of the two or more first channels 113a is greater than the sum of the flow cross-sectional areas of the two or more second channels 113b, resulting in more heat exchange medium flowing on the windward side of the heat exchange tube 11 than on the leeward side. This allows for full utilization of the heat exchanger 100's heat exchange efficiency on the windward side, thereby improving the heat exchanger 100's heat exchange efficiency on the windward side. The temperature difference between the air on the leeward side and the heat exchange medium on the leeward side is small. When the heat exchange medium on the leeward side is less than that on the windward side, the heat exchange medium can fully exchange heat on the windward side. This avoids the heat exchange medium being underutilized due to excessive heat exchange medium on the leeward side but insufficient heat exchange, thus reducing heat exchange medium waste, improving the consistency of the outlet state of heat exchanger 100, and improving the operational stability of heat exchanger 100.

[0066] Figure 10 In the illustrated embodiment, among the plurality of second channels 113b, there may also be a second channel 113b located at the limiting portion 111. The heat exchange tube 11 may also include a third channel 113c, and at least one third channel 113c is located between the first channel 113a and the second channel 113b along the width direction Y of the fin 3. In addition, the cross-sectional areas of each third channel 113c may be the same or different.

[0067] Therefore, in this embodiment of the application, the number and shape of the first channel 113a, the second channel 113b and the third channel 113c are not specifically limited, as long as the sum of the flow cross-sectional areas of each first channel 113a is greater than the sum of the flow cross-sectional areas of each second channel 113b, and the sum of the flow cross-sectional areas of the third channels 113c is not greater than the sum of the flow cross-sectional areas of the first channels 113a.

[0068] On the other hand, such as Figure 7-10In the embodiment shown, the second segment 112a of the heat exchange tube 116 of the heat exchange tube 11 can be an arc, the cross section of the second outer contour line 111a of the limiting part 111 can be a broken line, and the limiting part 111 is a protrusion that protrudes in the direction of the heat exchange tube 116 toward the leeward side.

[0069] Specifically, the height direction of the limiting part 111 is parallel to the length direction X of the fin 3.

[0070] Accordingly, please refer to Figure 11 The fin 3 includes multiple mounting portions 21, each mounting portion 21 including a first wall portion 23 and a second wall portion 24. The shape and size of the first wall portion 23 are similar to those of the second wall portion 24. Figure 7-10 The heat exchange tube 116 of the heat exchange tube 11 is adapted to the shape and size of the second wall portion 24. Figure 7-10 The limiting portion 111 of the heat exchange tube 11 is adapted to the mounting portion 21. When the heat exchange tube 11 is installed in the mounting portion 21, the limiting portion 111 can only cooperate with the second wall portion 24, and the heat exchange tube 116 can only cooperate with the first wall portion 23. This design can ensure that the heat exchange tube 11 is installed accurately in the predetermined direction. Furthermore, when the heat exchange tube 11 is installed in the mounting portion 21, the square-structured limiting portion 111 and the second wall portion 24 can also prevent the heat exchange tube 11 from rotating.

[0071] Furthermore, the dimension of the limiting part 111 at all points along the length of the fin 3 is L1, and the equivalent diameter of the heat exchange tube 116 is R, where L1 < R, meaning that the maximum dimension of the heat exchange tube 116 along the length X of the fin 3 is greater than the maximum dimension of the limiting part 111 along the length X of the fin 3. When L1 < R, the boundary layer at the outer wall of the heat exchange tube 11 can be broken when air flows through it, allowing the air to fully contact not only the heat exchange tube 116 on the windward side but also the limiting part 111 on the leeward side, thereby improving the heat exchange efficiency, especially the heat exchange efficiency on the leeward side.

[0072] The following section describes in detail the structure of another type of heat exchange tube and the structure of the fins on which the heat exchange tube is mounted.

[0073] Please refer to Figures 12-16 ,in, Figure 12 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 13 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 14 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 15 This is a schematic diagram of the structure of the fins provided in this application in yet another specific embodiment. Figure 16 for Figure 15 A magnified view of part I in the middle.

[0074] like Figure 12In the illustrated embodiment, the heat exchange tube 11 has channels including a first channel 113a and a second channel 113b, and there are multiple second channels 113b. These multiple second channels 113b are arranged along the length direction X of the fin 3, meaning that all the multiple second channels 113b are located near the leeward side. The flow cross-sectional area of ​​the first channel 113a is greater than the sum of the flow cross-sectional areas of the multiple second channels 113b.

[0075] Figure 13 In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a and the second channel 113b are both partially circular channels, and the third channel 113c is an approximately trapezoidal channel. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0076] Figure 14 In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a is a partially circular channel, and the second channel 113b and the third channel 113c are both approximately trapezoidal channels. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0077] Therefore, in this embodiment of the application, the number and shape of the first channel 113a, the second channel 113b and the third channel 113c are not specifically limited, as long as the sum of the flow cross-sectional areas of each first channel 113a is greater than the sum of the flow cross-sectional areas of each second channel 113b, and the sum of the flow cross-sectional areas of the third channels 113c is not greater than the sum of the flow cross-sectional areas of the first channels 113a.

[0078] On the other hand, such as Figure 12-14 In the embodiment shown, the second segment 112a of the heat exchange tube 116 of the heat exchange tube 11 can be an arc, and the cross section of the second outer contour line 111a of the limiting part 111 can be square and recessed relative to the direction of the heat exchange tube 116 toward the windward side.

[0079] Accordingly, please refer to Figure 15 and Figure 16 The fin 3 includes multiple mounting portions 21, each mounting portion 21 being a through hole extending through the fin 3 along its thickness direction Z. Each mounting portion 21 includes a first wall portion 23 and a second wall portion 24. The shape and size of the first wall portion 23 are similar to... Figure 12-14 The heat exchange tube 116 of the heat exchange tube 11 is adapted to the shape and size of the second wall portion 24. Figure 12-14The limiting part 111 of the heat exchange tube 11 is adapted to the mounting part 21. When the heat exchange tube 11 is installed in the mounting part 21, the limiting part 111 can only cooperate with the second wall part 24, and the heat exchange tube 116 can only cooperate with the first wall part 23. This design can ensure that the heat exchange tube 11 is installed accurately in the predetermined direction.

[0080] The first wall portion 23 can be part of the sidewall of the circular hole, and the inner wall of the mounting portion 21 has a protrusion 25 protruding towards the interior of the mounting portion 21. The outer contour of the protrusion 25 is the second wall portion 24. When the heat exchange tube 11 is installed in the mounting portion 21, the limiting portion 111 of the recessed structure and the protrusion 24 of the fin 3 are interlocked, thereby improving the installation reliability of the heat exchange tube 11 and the fin 3. When the heat exchange tube 11 is installed in the mounting portion 21, the interlocked limiting portion 111 and the protrusion 25 can prevent the heat exchange tube 11 from rotating.

[0081] Furthermore, the dimension of the limiting part 111 at all points along the length of the fin 3 is L1, and the equivalent diameter of the heat exchange tube 116 is R, where L1 < R, meaning that the maximum dimension of the heat exchange tube 116 along the length X of the fin 3 is greater than the maximum dimension of the limiting part 111 along the length X of the fin 3. When L1 < R, the boundary layer at the outer wall of the heat exchange tube 11 can be broken when air flows through it, allowing the air to fully contact not only the heat exchange tube 116 on the windward side but also the limiting part 111 on the leeward side, thereby improving the heat exchange efficiency, especially the heat exchange efficiency on the leeward side.

[0082] The following section describes in detail the structure of another type of heat exchange tube and the structure of the fins on which the heat exchange tube is mounted.

[0083] Please refer to Figures 17-19 ,in, Figure 17 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 18 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 19 This is a schematic diagram of the structure of the heat exchange tube provided in this application in yet another specific embodiment. Figure 20 This is a schematic diagram of the structure of the fins provided in this application in yet another specific embodiment.

[0084] like Figure 17 In the illustrated embodiment, the heat exchange tube 11 has channels including a first channel 113a and a second channel 113b, and the second channels 113b and 113b are arranged along the width direction Y of the fin 3, such that the first channel 113a is located near the windward side and the second channel 113b is located near the leeward side. The flow cross-sectional area of ​​the first channel 113a is larger than that of the second channel 113b.

[0085] Figure 18In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a and the second channel 113b are both partially circular channels, and the third channel 113c is an approximately trapezoidal channel. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0086] Figure 19 In the embodiment shown, the heat exchange tube 11 has channels including a first channel 113a, a third channel 113c, and a second channel 113b arranged along the width direction Y of the fins 3. The first channel 113a is a partially circular channel, and the second channel 113b and the third channel 113c are both approximately trapezoidal channels. The flow cross-sectional area of ​​the first channel 113a is larger than the flow cross-sectional areas of the second channel 113b and the third channel 113c.

[0087] Therefore, in this embodiment of the application, the number and shape of the first channel 113a, the second channel 113b and the third channel 113c are not specifically limited, as long as the sum of the flow cross-sectional areas of each first channel 113a is greater than the sum of the flow cross-sectional areas of each second channel 113b, and the sum of the flow cross-sectional areas of the third channels 113c is not greater than the sum of the flow cross-sectional areas of the first channels 113a.

[0088] On the other hand, such as Figure 17-19 In the embodiment shown, the second segment 112a of the heat exchange tube 116 of the heat exchange tube 11 can be an arc, and the cross section of the second outer contour line 111a of the limiting part 111 can be a straight line, that is, the limiting part 111 can be a planar structure, and the plane where the limiting part 111 is located is perpendicular to the width direction Y of the fin 3.

[0089] Accordingly, please refer to Figure 20 The fin 3 includes multiple mounting portions 21, each mounting portion 21 being a through hole extending through the fin 3 along its thickness direction Z. Each mounting portion 21 includes a first wall portion 23 and a second wall portion 24. The shape and size of the first wall portion 23 are similar to... Figure 17-19 The heat exchange tube 116 of the heat exchange tube 11 is adapted to the shape and size of the second wall portion 24. Figure 17-19 The limiting part 111 of the heat exchange tube 11 is adapted to the mounting part 21. When the heat exchange tube 11 is installed in the mounting part 21, the limiting part 111 can only cooperate with the second wall part 24, and the heat exchange tube 116 can only cooperate with the first wall part 23. The limiting part 111 can be used to identify the side of the heat exchange tube 11 with the second channel 113b, thereby improving the installation accuracy of the heat exchange tube 11.

[0090] The first wall portion 23 can be a part of the sidewall of a circular hole, and the second wall portion 24 can be a straight line. When the heat exchange tube 11 is installed on the mounting portion 21, it cannot be installed if the heat exchange tube 116 faces the second wall portion 24 and the limiting portion 111 faces the first wall portion 23, thus ensuring that the heat exchange tube 11 is installed accurately in the predetermined direction. Moreover, when the limiting portion 111 cooperates with the second wall portion 24, it can restrict the relative rotation between the heat exchange tube 11 and the fins 3, improving the installation reliability of the heat exchange tube 11.

[0091] Furthermore, the dimension of the limiting part 111 at all points along the length of the fin 3 is L1, and the equivalent diameter of the heat exchange tube 116 is R, where L1 < R, meaning that the maximum dimension of the heat exchange tube 116 along the length X of the fin 3 is greater than the maximum dimension of the limiting part 111 along the length X of the fin 3. When L1 < R, the boundary layer at the outer wall of the heat exchange tube 11 can be broken when air flows through it, allowing the air to fully contact not only the heat exchange tube 116 on the windward side but also the limiting part 111 on the leeward side, thereby improving the heat exchange efficiency, especially the heat exchange efficiency on the leeward side.

[0092] Of course, the heat exchange tube 116 and the limiting part 111 of the heat exchange tube 11 can also be other structures. This application does not limit the specific structure of the limiting part 111.

[0093] Additionally, it should be noted that, generally, the first channel 113a is located in the heat exchange tube 116, and the second channel 113b can be located in the limiting part 111 or in the heat exchange tube 116, or a portion of the second channel 113b can be located in the heat exchange tube 116 and another portion can be located in the limiting part 111. The third channel 113c can be located in the limiting part 111 or in the heat exchange tube 116, or a portion of the third channel 113c can be located in the heat exchange tube 116 and another portion can be located in the limiting part 111.

[0094] Please continue to refer to this. Figure 21 and Figure 22 , Figure 21 for Figure 1 Front view, Figure 22 for Figure 21 A sectional view along line AA.

[0095] like Figure 21As shown, in this embodiment, the heat exchanger 100 may include two heat exchange tube rows, namely a first heat exchange tube row 1 and a second heat exchange tube row 2, which are spaced apart along the width direction Y of the fins 3. Each heat exchange tube row includes a plurality of heat exchange tubes 11 spaced apart along the length direction X of the fins 3. In the heat exchanger 100, the sum of the flow cross-sectional areas of each first channel 113a is greater than the sum of the flow cross-sectional areas of each second channel 113b. That is, in the heat exchanger 100, the sum of the flow cross-sectional areas of the channels on the windward side is greater than the sum of the flow cross-sectional areas of the channels on the leeward side. For the heat exchanger 100 as a whole, the flow rate of the heat exchange medium flowing on the windward side is greater than the flow rate of the heat exchange medium flowing on the leeward side, thereby making full use of the heat exchange medium and making the heat exchanger 100 more efficient on the windward side.

[0096] Of course, heat exchanger 100 may also include two or more heat exchange tube banks. This application does not specify the number of heat exchange tube banks.

[0097] This application also discloses a heat exchange system, such as Figure 23 As shown, the heat exchange system includes a first heat exchanger 100, a second heat exchanger 200, a compressor 300, and a flow regulating valve 400. The first port 301 of the compressor 300 is connected to the first heat exchanger 100, the first heat exchanger 100 is connected to the first port 401 of the flow regulating valve, the second port 402 of the flow regulating valve is connected to the second heat exchanger 200, and the second heat exchanger 200 is connected to the second port 302 of the compressor 300. At least one of the first heat exchanger 100 and the second heat exchanger 200 is the heat exchanger provided above.

[0098] According to the heat exchange system proposed in this application, in the working state, high-temperature and high-pressure refrigerant flows out from the first port 301 of the compressor 300, and then flows sequentially through the first heat exchanger 100, the flow regulating valve 400, and the second heat exchanger 200, and then returns to the compressor through the second port 302 of the compressor 300. In the working state, the refrigerant exchanges heat with the air. Since the heat exchange system improves the heat exchange performance of the first heat exchanger 100 and / or the second heat exchanger 200, it is beneficial to improve the heat exchange performance of the heat exchange system.

[0099] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes fins and at least two heat exchange tube rows, which are spaced apart in the width direction of the fins. Each heat exchange tube row includes a plurality of heat exchange tubes spaced apart in the length direction of the fins. Each heat exchange tube has a plurality of channels extending along the length direction of the heat exchange tube and penetrating both end faces of the heat exchange tube. The plurality of channels are spaced apart in the direction from the windward side to the leeward side of the heat exchange tube. The heat exchange tubes penetrate the fins. The side of the heat exchanger located upstream in the wind direction during operation is defined as the windward side, and the side located downstream in the wind direction is defined as the leeward side. The plurality of channels includes a first channel and a second channel. The first channel is closer to the windward side than other channels except the first channel, and the second channel is closer to the leeward side than other channels except the second channel. The flow cross-sectional area of ​​the first channel is larger than that of the second channel.

2. The heat exchanger according to claim 1, characterized in that, In the direction from the windward side to the leeward side, there is a third channel between the first channel and the second channel. The flow cross-sectional area of ​​the first channel is defined as S1, the flow cross-sectional area of ​​the second channel is defined as S2, and the flow cross-sectional area of ​​the third channel is defined as S3, satisfying: S1≥S3>S2 or S1>S3≥S2.

3. The heat exchanger according to claim 1, characterized in that, The heat exchange tube includes a limiting portion and has a cross-section perpendicular to its length. On the cross-section, the heat exchange tube has an outer contour line. The outer contour line of the limiting portion is a first line segment. The outer contour line includes the first line segment and also includes a second line segment. The second line segment is an arc segment. One end of the second line segment is connected to one end of the first line segment, and the other end of the second line segment is connected to the other end of the first line segment. The length of the second line segment is greater than the length of the first line segment. The first line segment includes at least one of a curve, an arc, a straight line, and a broken line.

4. The heat exchanger according to claim 3, characterized in that, The length of the outer contour line is C1, the first line segment is closer to the leeward side than the second line segment, the length of the second line segment is C2, and the length of the first line segment is C3, satisfying that C2 > 0.5C1 and C2 > C3.

5. The heat exchanger according to claim 3, characterized in that, The maximum dimension of the limiting part in the length direction of the fin is L1, and the equivalent diameter of the heat exchange tube is R, wherein L1 < R.

6. The heat exchanger according to claim 3, characterized in that, The second line segment has a central angle α, where 190°≤α≤220°.

7. The heat exchanger according to claim 3, characterized in that, The limiting part is a convex part that protrudes towards the leeward side. The height direction of the limiting part is parallel to the length direction of the fin, and the height of the limiting part gradually decreases in the width direction of the fin.

8. The heat exchanger according to claim 3, characterized in that, The limiting portion has at least a portion of the second channel, which extends through both end faces of the limiting portion.

9. The heat exchanger according to any one of claims 1 to 8, characterized in that, There are two or more first channels, which are spaced apart in the circumferential direction of the heat exchange tube. There are two or more second channels, which are spaced apart in the circumferential direction of the heat exchange tube. The sum of the flow cross-sectional areas of the two or more first channels is greater than the sum of the flow cross-sectional areas of the two or more second channels.

10. A heat exchange system, characterized in that, The heat exchange system includes a compressor, a first heat exchanger, a flow regulating valve, and a second heat exchanger. One interface of the compressor is connected to the first heat exchanger, the first heat exchanger is connected to one interface of the flow regulating valve, the other interface of the flow regulating valve is connected to the second heat exchanger, and the second heat exchanger is connected to the other interface of the compressor. At least one of the first heat exchanger and the second heat exchanger is a heat exchanger as described in any one of claims 1 to 9.

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