Heat exchanger and air conditioning system having the same

Abstract

The present invention discloses a heat exchanger and an air conditioning system having the heat exchanger. The heat exchanger comprises a first heat exchanger core and a second heat exchanger core, the first heat exchanger core comprises a first heat exchange tube and a first fin, and the second heat exchanger core comprises a second heat exchange tube and a second fin. The angle between the first heat exchanger core and the second heat exchanger core is α, the length of the first heat exchange tube is TL, the refrigerant flow area of ​​the first heat exchange tube is S, the width of the first fin is FW, the density of the first fin is FP, the height of the first fin is FH, the width of the first heat exchanger core is ML, the length of the second heat exchange tube is tl, the refrigerant flow area of ​​the second heat exchange tube is s, the width of the second fin is fw, the density of the second fin is fp, the height of the second fin is fh, the width of the second heat exchanger core is ml, and 0.016≤(TL×ML×FW×FP×FH×s×cosα) / (tl×ml×fw×fp×fh×S)≤64. This improves the drainage performance of the heat exchanger and solves the water blowing problem of the heat exchanger.

Description

Technical Field

[0001] Embodiments of the present invention relate to a heat exchanger and an air conditioning system having the heat exchanger. Background Art

[0002] The heat exchanger includes a header and a heat exchange tube. The heat exchanger may include a plurality of heat exchanger cores. Summary of the invention

[0003] An object of embodiments of the present invention is to provide a heat exchanger and an air conditioning system having the same, by which, for example, drainage performance of the heat exchanger can be improved.

[0004] 14. The heat exchanger of claim 13, wherein the heat exchanger comprises a first heat exchange tube, the first heat exchange tube having a first end and a second end; and a first fin arranged alternately with the first heat exchange tube; and a second heat exchange tube, the second heat exchange tube comprising a second heat exchange tube, the second heat exchange tube having a first end and a second end, the first end of the second heat exchange tube being connected to the first end of the first heat exchange tube and being fluidically connected; and a second fin arranged alternately with the second heat exchange tube, wherein: the first heat exchanger core is located on one side of the second heat exchanger core in the thickness direction of the second heat exchanger core, the orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core at least partially overlaps with the orthographic projection of the second heat exchanger core on a plane parallel to the second heat exchanger core, and the first heat exchanger core and the second heat exchanger core are arranged alternately. The angle between the heat exchanger cores is α, the length of the first heat exchange tube of the first heat exchanger core is TL, the refrigerant flow area of ​​the first heat exchange tube is S, the width of the first fin is FW, the density of the first fin is FP, the height of the first fin is FH, and the size of the first heat exchanger core in the direction in which the first fin and the first heat exchange tube are alternately arranged is ML, the length of the second heat exchange tube of the second heat exchanger core is t1, the refrigerant flow area of ​​the second heat exchange tube is s, the width of the second fin is fw, the density of the second fin is fp, the height of the second fin is fh, and the size of the second heat exchanger core in the direction in which the second fin and the second heat exchange tube are alternately arranged is ml, and 0.016≤(TL×ML×FW×FP×FH×s×cosα) / (tl×ml×fw×fp×fh×S)≤64.

[0005] According to an embodiment of the present invention, 0°≤α≤45°.

[0006] According to an embodiment of the present invention, 0.005≤(TL×ML×FW×FP×FH) / (tl×ml×fw×fp×fh)≤18.

[0007] According to an embodiment of the present invention, 0.09≤(TL×ML) / (tl×ml)≤0.95.

[0008] According to an embodiment of the present invention, 0.21≤TL×cosα / tl≤0.95.

[0009] According to an embodiment of the present invention, 0.05≤(FW×FP×FH) / (fw×fp×fh)≤18.

[0010] According to an embodiment of the present invention, 0.2≤(FW×FP) / (fw×fp)≤9.

[0011] According to an embodiment of the present invention, 0.28≤(TL×s) / (tl×S)≤3.5.

[0012] According to an embodiment of the present invention, the first heat exchange tube and the second heat exchange tube are formed by bending the heat exchange tube, or the first heat exchanger core and the second heat exchanger core are formed by bending the heat exchanger core.

[0013] According to an embodiment of the present invention, the heat exchanger further comprises: a connecting portion, through which the first end of the first heat exchange tube of the first heat exchanger core is connected and fluidically communicated with the first end of the second heat exchange tube of the second heat exchanger core.

[0014] According to an embodiment of the present invention, the connection portion comprises a connection pipe, and the first end of the first heat exchange tube of the first heat exchange core and the first end of the second heat exchange tube of the second heat exchange core are connected and fluidically communicated through the connection pipe.

[0015] According to an embodiment of the present invention, the connecting part includes two fluid-connected connecting headers, one of the two connecting headers is connected to the first end of the first heat exchange tube of the first heat exchanger core and is fluid-connected, and the other of the two connecting headers is connected to the first end of the second heat exchange tube of the second heat exchanger core and is fluid-connected.

[0016] According to an embodiment of the present invention, the heat exchanger further includes: a first header connected to and fluidically connected to the second end of the first heat exchange tube of the first heat exchanger core, and a second header connected to and fluidically connected to the second end of the second heat exchange tube of the second heat exchanger core.

[0017] According to an embodiment of the present invention, the heat exchanger further comprises: an outlet side header, the outlet side header being in fluid communication with one of the first header and the second header on the refrigerant outlet side of the heat exchanger via a connecting pipe.

[0018] According to an embodiment of the present invention, the heat exchanger also includes: a refrigerant distribution device, wherein the refrigerant distribution device is arranged in a collecting tube on the refrigerant inlet side of the heat exchanger among the first collecting tube and the second collecting tube; or the refrigerant distribution device is arranged outside a collecting tube on the refrigerant inlet side of the heat exchanger among the first collecting tube and the second collecting tube, and is fluidly connected to the one collecting tube through a plurality of connecting pipes.

[0019] According to an embodiment of the present invention, a cross-sectional area of ​​one of the first and second headers on the refrigerant inlet side of the heat exchanger is smaller than a cross-sectional area of ​​another of the first and second headers on the refrigerant outlet side of the heat exchanger.

[0020] According to an embodiment of the present invention, the first header is used to allow the refrigerant to flow into the heat exchanger, and the second header is used to allow the refrigerant to flow out of the heat exchanger.

[0021] An embodiment of the present invention further provides an air conditioning system, comprising: the above-mentioned heat exchanger.

[0022] According to an embodiment of the present invention, the heat exchanger also includes: a first header connected to and fluidically connected to the second end of the first heat exchange tube of the first heat exchanger core, and a second header connected to and fluidically connected to the second end of the second heat exchange tube of the second heat exchanger core, and the first header and the second header are horizontally arranged during use and / or one of the first header and the second header is below the other during use.

[0023] According to an embodiment of the present invention, in use, in the direction of air flowing through the heat exchanger, the second heat exchanger core is located upstream of the first heat exchanger core.

[0024] By using the heat exchanger according to the embodiment of the present invention and the air conditioning system having the heat exchanger, for example, the drainage performance of the heat exchanger can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic perspective view of a heat exchanger according to an embodiment of the present invention;

[0026] Figure 2 is a schematic perspective view of a fin of a heat exchanger according to an embodiment of the present invention;

[0027] Figure 3 is a relationship diagram between the heat exchange performance Q of the heat exchanger according to an embodiment of the present invention and the amount of condensed water W of the first heat exchanger core; and

[0028] Figure 4 for Figure 1 A schematic perspective view of a heat exchanger is shown with parameters of the heat exchanger indicated;

[0029] Figure 5 for Figure 2 A schematic perspective view of the fin shown, with the parameters of the fin indicated;

[0030] Figure 6 for Figure 1 A schematic cross-sectional view of an embodiment of a heat exchange tube in which parameters of the heat exchange tube are marked;

[0031] Figure 7 A schematic perspective view of a heat exchanger according to a modified example of the embodiment of the present invention;

[0032] Figure 8 for Figure 7 A schematic front view of the heat exchanger shown;

[0033] Fig. 9 for Figure 7 A schematic side view of a heat exchanger is shown;

[0034] Fig.10 is a schematic perspective view of a portion of a heat exchanger according to an embodiment of the present invention, wherein a header is cut away to illustrate a refrigerant distribution device;

[0035] Fig.11 for Fig.10 A schematic front view of a portion of the heat exchanger shown with the header cut away;

[0036] Fig.12 for Fig.10 A schematic side view of a portion of a heat exchanger is shown;

[0037] Fig.13 is a schematic perspective view of a portion of a heat exchanger according to an embodiment of the present invention, wherein a refrigerant distribution device is shown;

[0038] Fig.14 for Fig.13 A schematic front view of a portion of the heat exchanger shown; and

[0039] Fig.15 for Fig.13 A schematic side view of a portion of a heat exchanger is shown. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Parallel flow heat exchangers have the advantages of compact structure, high heat exchange efficiency, environmental friendliness, and low refrigerant charge. They are widely used in condensers and evaporators of air-conditioning systems. However, when parallel flow heat exchangers are used as evaporators, especially in air-conditioning systems, water blowing problems may occur. This condensed water generated on the surface of the heat exchanger will enter the room with the incoming air, affecting the customer experience. One current solution is to install the parallel flow heat exchanger at an angle, using gravity to make the condensed water on the surface of the heat exchanger quickly drip into the water collection tray. However, this type of structure increases the cost of the heat exchanger on the one hand, and on the other hand, the condensed water in the dripping process will still be brought into the room by the incoming air.

[0042] An air conditioning system according to an embodiment of the present invention includes a compressor as a heat exchanger of an evaporator or a condenser.

[0043] See also Figure 1 , Figure 2 , Figure 7 , Figure 8 , Fig. 9 The heat exchanger 100 according to the embodiment of the present invention comprises: a first heat exchanger core 1, wherein the first heat exchanger core 1 comprises: a first heat exchange tube 11, wherein the first heat exchange tube 11 has a first end (e.g. Figure 1 The upper end in the middle) and the second end (e.g. Figure 1 and first fins 12 arranged alternately with the first heat exchange tubes 11; and a second heat exchanger core 2, the second heat exchanger core 2 comprising: a second heat exchange tube 21, the second heat exchange tube 21 having a first end (e.g. Figure 1 The upper end in the middle) and the second end (e.g. Figure 1The first end of the second heat exchange tube 21 is connected to the first end of the first heat exchange tube 11 and is in fluid communication; and the second fins 22 are arranged alternately with the second heat exchange tube 21. The first heat exchanger core 1 is located on one side of the second heat exchanger core 2 in the thickness direction of the second heat exchanger core 2, and the orthographic projection of the first heat exchanger core 1 on a plane parallel to the second heat exchanger core 2 at least partially overlaps with the orthographic projection of the second heat exchanger core 2 on a plane parallel to the second heat exchanger core 2. For example, the orthographic projection of the first heat exchanger core 1 can basically fall within the orthographic projection of the second heat exchanger core 2, or the orthographic projection of the smaller one of the two can basically fall within the orthographic projection of the larger one. The angle between the first heat exchanger core 1 and the second heat exchanger core 2 is α (i.e., the angle between the plane parallel to the first heat exchanger core 1 and the plane parallel to the second heat exchanger core 2 is α), the length of the first heat exchange tube 11 of the first heat exchanger core 1 is TL, the refrigerant flow area of ​​the first heat exchange tube 11 is S, the width of the first fin 12 is FW, the density of the first fin 12 is FP, the height of the first fin 12 is FH, and the dimension of the first heat exchanger core 1 in the direction in which the first fin 12 and the first heat exchange tube 11 are alternately arranged (i.e., the width of the first heat exchanger core 1 is The length of the second heat exchange tube 21 of the second heat exchanger core 2 is tl, the refrigerant flow area of ​​the second heat exchange tube 21 is s, the width of the second fin 22 is fw, the density of the second fin 22 is fp, the height of the second fin 22 is fh, and the dimension of the second heat exchanger core 2 in the direction in which the second fin 22 and the second heat exchange tube 21 are alternately arranged (i.e., the width of the second heat exchanger core 2) is ml, and 0.016≤(TL×ML×FW×FP×FH×s×cosα) / (tl×ml×fw×fp×fh×S)≤64. It should be noted that the density of the fin is the number of peaks (or the number of troughs) per unit length in the arrangement direction of the multiple peaks (or troughs) of the wavy fin.

[0044] Figure 4 for Figure 1 A schematic perspective view of a heat exchanger is shown, in which the following parameters of the heat exchanger 100 are marked: the length TL of the first heat exchange tube 11 of the first heat exchanger core 1, the dimension of the first heat exchanger core 1 in the direction in which the first fins 12 and the first heat exchange tubes 11 are alternately arranged (i.e., the width of the first heat exchanger core 1) ML, the angle α between the first heat exchanger core 1 and the second heat exchanger core 2 (i.e., the angle α between the plane parallel to the first heat exchanger core 1 and the plane parallel to the second heat exchanger core 2), the length tl of the second heat exchange tube 21 of the second heat exchanger core 2, and the dimension of the second heat exchanger core 2 in the direction in which the second fins 22 and the second heat exchange tubes 21 are alternately arranged (i.e., the width of the second heat exchanger core 2) ml. Figure 5 for Figure 2 A schematic perspective view of the fins 12 , 22 is shown, wherein the following parameters of the fins are marked: width FW of the first fin 12 , height FH of the first fin 12 , width fw of the second fin 22 , height fh of the second fin 22 . Figure 6 for Figure 1 A schematic cross-sectional view of an embodiment of a first heat exchange tube 11 of a first heat exchanger core 1 and a second heat exchange tube 21 of a second heat exchanger core 2, wherein the heat exchange tube is a flat tube, the flat tube includes a plurality of channels, and the refrigerant flow area of ​​the heat exchange tube is the sum of the refrigerant flow areas of the plurality of channels. Figure 6 The following parameters of the heat exchange tubes are marked: the refrigerant flow area S of the first heat exchange tube 11 and the refrigerant flow area s of the second heat exchange tube 21 .

[0045] After a lot of experimental research on heat exchangers, the inventor found that Figure 3 As shown in the relationship diagram between the heat exchange performance Q and the condensed water amount W of the first heat exchanger core, adjusting the heat exchange intensity of the first heat exchanger core 1 within a reasonable range can improve the condensed water amount of the first heat exchanger core 1 without affecting the total heat exchange amount of the heat exchanger 100. Therefore, the water blowing problem of the air-conditioning system can be solved by adjusting the heat exchange intensity of different rows of heat exchanger cores.

[0046] According to the principles of heat transfer, on the one hand, the amount of condensed water in the first heat exchanger core 1 can be adjusted by adjusting the heat exchange area of ​​the first heat exchanger core 1, such as adjusting the length of the first heat exchange tube 11 or the width of the first heat exchanger core 1 and other parameters; on the other hand, the amount of condensed water in the first heat exchanger core 1 can be adjusted by adjusting the heat exchange intensity on the air side of the first heat exchanger core 1, such as adjusting the width of the first fin 12 or the fin density and other parameters; on the other hand, the amount of condensed water in the first heat exchanger core 1 can be adjusted by adjusting the heat exchange intensity on the refrigerant side. By adjusting the first heat exchanger core 1, the condensed water of the first heat exchanger core 1 can be improved, but it also brings other problems. For example, reducing the heat exchange area of ​​the first heat exchanger core 1 also affects the total heat exchange of the heat exchanger 100. Therefore, considering the overall requirements of the heat exchanger 100, when 0.016≤(TL×ML×FW×FP×FH×s×cosα) / (tl×ml×fw×fp×fh×S)≤64 is met, the heat exchange performance change of the heat exchanger can be controlled within 5%, without affecting the heat exchange capacity of the air-conditioning system and without causing the water blowing problem of the air-conditioning system.

[0047] According to an embodiment of the present invention, 0°≤α≤45°, for example Figure 1 In the embodiment, the first heat exchanger core 1 and the second heat exchanger core 2 are parallel to each other, so the angle α between the first heat exchanger core 1 and the second heat exchanger core 2 is equal to zero.

[0048] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be improved by adjusting the total heat exchange area ratio of the first heat exchanger core to the second heat exchanger core, for example, 0.005≤(TL×ML×FW×FP×FH) / (tl×ml×fw×fp×fh)≤18.

[0049] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be solved by adjusting the windward area ratio of the first heat exchanger core 1 to the second heat exchanger core 2, for example, 0.09≤(TL×ML) / (tl×ml)≤0.95.

[0050] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be solved by adjusting the ratio of the heat exchange tube lengths of the first heat exchanger core to the second heat exchanger core, for example, 0.21≤TL×cosα / tl≤0.95.

[0051] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be solved by adjusting the ratio of the total heat exchange area of ​​the fins of the first heat exchanger core to that of the second heat exchanger core, for example, 0.05≤(FW×FP×FH) / (fw×fp×fh)≤18.

[0052] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be solved by adjusting the fin density ratio of the first heat exchanger core to the second heat exchanger core, for example, 0.2≤(FW×FP) / (fw×fp)≤9.

[0053] According to an embodiment of the present invention, the water blowing problem of the heat exchanger can be solved by adjusting the refrigerant flow area ratio of the first heat exchanger core to the second heat exchanger core, for example, 0.28≤(TL×s) / (tl×S)≤3.5.

[0054] According to an embodiment of the present invention, see Figure 1 The first heat exchange tube 11 and the second heat exchange tube 21 are formed by bending the heat exchange tubes, or the first heat exchanger core 1 and the second heat exchanger core 2 are formed by bending the heat exchanger core.

[0055] According to an embodiment of the present invention, the heat exchanger 100 further includes: a connecting portion 5, through which the first end of the first heat exchange tube 11 of the first heat exchanger core 1 and the first end of the second heat exchange tube 21 of the second heat exchanger core 2 are connected and fluidically communicated.

[0056] In the embodiments of the present invention, see Figure 1 , Figure 7 , Figure 8, the connection part 5 may include a plurality of connection tubes 51, and the first end of the first heat exchange tube 11 of the first heat exchanger core 1 and the first end of the second heat exchange tube 21 of the second heat exchanger core 2 are respectively connected through the plurality of connection tubes 51. In the embodiment shown in the figure, the first heat exchanger core 1 and the second heat exchanger core 2 are formed by bending the same heat exchanger core, and the bent portion of the heat exchanger core constitutes the connection part 5. The connection part 5 may include heat exchange tubes as a plurality of connection tubes 51 and fins alternately arranged with the plurality of connection tubes 51. In addition, the connection part 5 may also be a connection part 5 of other forms, and the first heat exchange tube 11 of the first heat exchanger core 1 and the second heat exchange tube 21 of the second heat exchanger core 2 are connected through the connection part 5, but the first heat exchange tube 11 of the first heat exchanger core 1 and the second heat exchange tube 21 of the second heat exchanger core 2 are not connected one-to-one.

[0057] For example, in an embodiment of the present invention, see Figure 1 , Figure 7 , Figure 8 , the connection portion 5 may include two fluid-connected connection headers, one of the two connection headers is connected to and fluidically communicated with the first end of the first heat exchange tube 11 of the first heat exchange core 1, and the other of the two connection headers is connected to and fluidically communicated with the first end of the second heat exchange tube 21 of the second heat exchange core 2. Thus, the first end of the first heat exchange tube 11 of the first heat exchange core 1 and the first end of the second heat exchange tube 21 of the second heat exchange core 2 are connected and fluidically communicated through the connection portion 5.

[0058] In the embodiments of the present invention, see Figure 1 , Figure 7 , Figure 8 , Fig. 9 The heat exchanger 100 further includes: a first header 13 connected to and in fluid communication with the second end of the first heat exchange tube 11 of the first heat exchange core 1, and a second header 23 connected to and in fluid communication with the second end of the second heat exchange tube 21 of the second heat exchange core 2. According to an example of the present invention, see Figures 7 to 9, the heat exchanger 100 further includes: an outlet side header 24, the outlet side header 24 is fluidly connected with one of the first header 13 and the second header 23 on the refrigerant outlet side of the heat exchanger 100 through a connecting pipe 25. For example, the outlet side header is fluidly connected with the one header by one or more openings through the tube wall of the outlet side header 24 and one or more openings through the tube wall of the one header, using one or more connecting pipes 25. The outlet side header 24 can extend in substantially the same direction as the one header. In the illustrated embodiment, the second header 23 is on the refrigerant outlet side of the heat exchanger 100. For example, the outlet side header 24 is fluidly connected with the second header 23 by one or more openings through the tube wall of the outlet side header 24 and one or more openings through the tube wall of the second header 23. The outlet side header 24 and the second header 23 can extend in substantially the same direction. A cross-sectional area of ​​one of the first and second headers 13 and 23 on the refrigerant inlet side of the heat exchanger 100 may be smaller than a cross-sectional area of ​​the other of the first and second headers 13 and 23 on the refrigerant outlet side of the heat exchanger 100 .

[0059] See also Figures 10 to 15 In the embodiment of the present invention, the heat exchanger 100 further includes: a refrigerant distribution device 14, see Figures 10 to 12 The refrigerant distribution device 14 is disposed in one of the first header 13 and the second header 23 at the refrigerant inlet side of the heat exchanger 100. Figures 13 to 15 The refrigerant distribution device 14 can also be arranged outside one of the first header 13 and the second header 23 on the refrigerant inlet side of the heat exchanger 100, and be connected to the one header fluid through a plurality of connecting pipes 15. For example, through one or more openings through the tube wall of the distribution pipe serving as the refrigerant distribution device 14 and one or more openings through the tube wall of the one header, the distribution pipe is connected to the one header fluid by using one or more connecting pipes 15. The distribution pipe and the one header can extend in substantially the same direction. See Figures 13 to 15 In the illustrated embodiment, the first header 13 is at the refrigerant inlet side of the heat exchanger 100. For example, through one or more openings through the tube wall of the distribution tube as the refrigerant distribution device 14 and through one or more openings through the tube wall of the first header 13, the distribution tube is fluidically connected with the first header 13 by one or more connecting tubes 15. The distribution tube and the first header 13 can extend in substantially the same direction.

[0060] See also Figure 1 , Figure 7 , Figure 8 , Fig. 9 In an embodiment of the present invention, the first header 13 is used to allow the refrigerant to flow into the heat exchanger 100, and the second header 23 is used to allow the refrigerant to flow out of the heat exchanger 100. That is, the first header 13 is an inlet header, and the second header 23 is an outlet header. According to an example of the present invention, the first header 13 is equipped with a refrigerant distributor or a distribution pipe, which can reasonably distribute the refrigerant to evenly flow into the first heat exchange tube 11, and the second header 23 is equipped with a refrigerant collector or a collection pipe, which can reasonably adjust the pressure distribution of the refrigerant so that the amount of condensed water generated is more evenly distributed.

[0061] In the embodiments of the present invention, see Figure 1 In the air conditioning system including the heat exchanger 100 according to the above embodiment, the first header 13 and the second header 23 are arranged horizontally and / or one of the first header 13 and the second header 23 is below the other in use. In the direction A of air flowing through the heat exchanger 100 in use, the second heat exchanger core 2 can be located upstream of the first heat exchanger core 1.

[0062] In the embodiments of the present invention, see Figure 1 The header on the refrigerant inlet side may be installed with a refrigerant distributor, and the header on the refrigerant outlet side may be installed with a refrigerant collector.

[0063] In the embodiments of the present invention, see Figure 1 The heat exchange tube can be a flat tube. In addition, the plane parallel to the heat exchanger core is perpendicular to the thickness direction of the heat exchanger core.

[0064] By using the heat exchanger 100 according to the embodiment of the present invention, the drainage performance of the heat exchanger 100 can be improved.

[0065] By using the heat exchanger 100 according to the embodiment of the present invention, the heat exchange strength of different heat exchanger cores can be reasonably adjusted, and the distribution of the condensed water amount of the heat exchanger between different heat exchanger cores can be adjusted. By reducing the condensed water amount of the heat exchanger core close to the indoor side (for example, the first heat exchanger core 1), the water blowing problem of the air conditioning system can be solved.

[0066] Although the above embodiments have been described, some features of the above embodiments may be combined to form new embodiments.

[0067] In addition, although the embodiments of the present invention have been described, the above embodiments are merely examples used to facilitate understanding of the present invention and are not intended to limit the present invention. Those skilled in the art may modify the above embodiments without departing from the spirit and scope of the present invention.

Claims

1. A heat exchanger, comprising: A first heat exchanger core, the first heat exchanger core comprising: a first heat exchange tube, the first heat exchange tube having a first end and a second end; and first fins alternately arranged with the first heat exchange tube; and A second heat exchanger core, the second heat exchanger core comprising: a second heat exchange tube, the second heat exchange tube having a first end and a second end, the first end of the second heat exchange tube being connected to the first end of the first heat exchange tube and being in fluid communication; and second fins alternately arranged with the second heat exchange tube, wherein: The first heat exchanger core is located on one side of the second heat exchanger core in the thickness direction of the second heat exchanger core, and the orthographic projection of the first heat exchanger core on a plane parallel to the second heat exchanger core at least partially overlaps with the orthographic projection of the second heat exchanger core on a plane parallel to the second heat exchanger core. The angle between the first heat exchanger core and the second heat exchanger core is α, The length of the first heat exchange tube of the first heat exchange core is TL, the refrigerant flow area of ​​the first heat exchange tube is S, the width of the first fin is FW, the density of the first fin is FP, the height of the first fin is FH, and the dimension of the first heat exchange core in the direction in which the first fin and the first heat exchange tube are alternately arranged is ML, The length of the second heat exchange tube of the second heat exchange core is tl, the refrigerant flow area of ​​the second heat exchange tube is s, the width of the second fin is fw, the density of the second fin is fp, the height of the second fin is fh, and the dimension of the second heat exchange core in the direction in which the second fins and the second heat exchange tubes are alternately arranged is ml, and 0.016≤(TL×ML×FW×FP×FH×s×cosα) / (tl×ml×fw×fp×fh×S)≤64.

2. The heat exchanger according to claim 1, wherein: 0°≤α≤45°。 3. The heat exchanger according to claim 1, wherein: 0.005≤(TL×ML×FW×FP×FH) / (tl×ml×fw×fp×fh)≤18.

4. The heat exchanger according to claim 1, wherein: 0.09≤(TL×ML) / (tl×ml)≤0.

95.

5. The heat exchanger according to claim 1, wherein: 0.21≤TL×cosα / t1≤0.

95.

6. The heat exchanger according to claim 1, wherein: 0.05≤(FW×FP×FH) / (fw×fp×fh)≤18.

7. The heat exchanger according to claim 1, wherein: 0.2≤(FW×FP) / (fw×fp)≤9.

8. The heat exchanger according to claim 1, wherein: 0.28≤(TL×s) / (tl×S)≤3.

5.

9. The heat exchanger according to claim 1, wherein: The first heat exchange tube and the second heat exchange tube are formed by bending the heat exchange tube, or the first heat exchanger core and the second heat exchanger core are formed by bending the heat exchanger core.

10. The heat exchanger according to claim 1, further comprising: A connecting portion, through which a first end of a first heat exchange tube of the first heat exchange core is connected and fluidly communicated with a first end of a second heat exchange tube of the second heat exchange core.

11. The heat exchanger according to claim 10, wherein: The connecting portion includes a connecting pipe, through which a first end of a first heat exchange tube of the first heat exchange core and a first end of a second heat exchange tube of the second heat exchange core are connected and fluidically communicated.

12. The heat exchanger according to claim 10, wherein: The connecting portion includes two fluid-connected connecting headers, one of the two connecting headers is connected to the first end of the first heat exchange tube of the first heat exchanger core and is fluid-connected, and the other of the two connecting headers is connected to the first end of the second heat exchange tube of the second heat exchanger core and is fluid-connected.

13. The heat exchanger according to claim 1, further comprising: a first header connected to and in fluid communication with the second end of the first heat exchange tube of the first heat exchanger core, and A second header is connected to and in fluid communication with the second end of the second heat exchange tube of the second heat exchanger core.

14. The heat exchanger according to claim 13, further comprising: The outlet-side header is fluidically connected to one of the first header and the second header on the refrigerant outlet side of the heat exchanger through a connecting pipe.

15. The heat exchanger according to claim 13, further comprising: Refrigerant distribution device, wherein the refrigerant distribution device is arranged in one of the first header and the second header on the refrigerant inlet side of the heat exchanger; Alternatively, the refrigerant distribution device is disposed outside one of the first header and the second header on the refrigerant inlet side of the heat exchanger, and is fluidically connected to the one header through a plurality of connecting pipes.

16. The heat exchanger according to claim 13, wherein: A cross-sectional area of ​​one of the first and second headers on the refrigerant inlet side of the heat exchanger is smaller than a cross-sectional area of ​​the other of the first and second headers on the refrigerant outlet side of the heat exchanger.

17. The heat exchanger according to claim 13, wherein: The first header is used to allow the refrigerant to flow into the heat exchanger, and the second header is used to allow the refrigerant to flow out of the heat exchanger.

18. An air conditioning system, comprising: A heat exchanger according to any one of claims 1 to 17.

19. The air conditioning system according to claim 18, wherein: The heat exchanger also includes: a first header connected to and in fluid communication with the second end of the first heat exchange tube of the first heat exchanger core, and a second header connected to and in fluid communication with the second end of the second heat exchange tube of the second heat exchanger core, and The first header and the second header are arranged horizontally in use and / or one of the first header and the second header is below the other in use.

20. The air conditioning system of claim 18, wherein: In use, in the direction of air flow through the heat exchanger, the second heat exchanger core is located upstream of the first heat exchanger core.

Images