Plate heat exchanger

Abstract

The plate heat exchanger comprises a heat exchange core body and a distributor, the heat exchange core body is connected with the distributor, the heat exchange core body comprises a plurality of heat exchange plates, the plate heat exchanger is defined to have the height direction, the heat exchange plates are stacked in the height direction, the heat exchange core body is provided with a first flow channel, and at least part of the distributor is located in the first flow channel. The distributor comprises a distribution pipe, the distribution pipe is provided with a distribution pipe cavity, the distribution pipe cavity is communicated with the first flow channel, and the distribution pipe is a U-shaped pipe. According to the distributor, the distribution pipe is the U-shaped pipe, the U-shaped distribution flow path is formed, compared with a linear distribution flow path, the flow path is longer, and the distribution effect of the distributor is improved.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and more particularly to a plate heat exchanger. Background Technology

[0002] In related technologies, a plate heat exchanger includes a heat exchange core and a distributor, the heat exchange core and the distributor are connected, the heat exchange core includes multiple heat exchange plates, the multiple heat exchange plates are stacked along the height direction of the plate heat exchanger, the heat exchange core has a first flow channel, and the distributor is at least partially located in the first flow channel.

[0003] The distributor includes a distribution tube with a distribution cavity that is connected to the first flow channel. The distribution tube is a straight distribution tube, forming a straight distribution flow path. The distribution process is relatively short, resulting in poor distribution effect. Summary of the Invention

[0004] In view of the above-mentioned problems in the related technologies, this application provides a plate heat exchanger, which aims to improve the distribution effect of the distributor.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A plate heat exchanger includes a heat exchange core and a distributor connected to each other. The heat exchange core includes a plurality of heat exchange plates. The plate heat exchanger is defined to have a height direction. The plurality of heat exchange plates are stacked along the height direction. The heat exchange core has a first flow channel. The distributor is at least partially located in the first flow channel.

[0007] The distributor includes a distribution tube with a distribution cavity that communicates with the first flow channel, and the distribution tube is a U-shaped tube.

[0008] In this application, the distribution pipe is a U-shaped pipe, forming a U-shaped distribution flow path, which is longer than the straight distribution flow path, thus improving the distribution effect of the distributor.

[0009] To achieve the above objectives, this application also adopts the following technical solution:

[0010] A plate heat exchanger includes a heat exchange core and a distributor connected to each other. The heat exchange core includes a plurality of heat exchange plates. The plate heat exchanger is defined to have a height direction. The plurality of heat exchange plates are stacked along the height direction. The heat exchange core has a first flow channel. The distributor is at least partially located in the first flow channel.

[0011] The distributor includes a distribution pipe with a distribution cavity communicating with the first flow channel. The distribution pipe includes a first pipe section, a second pipe section, and a third pipe section. The first pipe section and the second pipe section are both connected to the third pipe section. The cavities of the first pipe section and the second pipe section are both connected to the cavity of the third pipe section. The third pipe section is located between the first pipe section and the second pipe section. The plate heat exchanger is defined to have a width direction, and the first pipe section and the second pipe section are arranged side by side along the width direction.

[0012] In this application, the distribution pipe includes a first pipe section, a second pipe section, and a third pipe section. The first pipe section and the second pipe section are arranged side by side along the width direction of the plate heat exchanger, and the cavity of the third pipe section is connected to the cavity of the first pipe section and the cavity of the second pipe section, forming a non-linear distribution flow path. Compared with the linear distribution flow path, the flow path is longer, which improves the distribution effect of the distributor. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the plate heat exchanger of this application;

[0014] Figure 2 This is an exploded view of an embodiment of the plate heat exchanger of this application;

[0015] Figure 3 This is another exploded view of an embodiment of the plate heat exchanger of this application;

[0016] Figure 4 This is a cross-sectional schematic diagram and a partial enlarged view of an embodiment of the plate heat exchanger of this application;

[0017] Figure 5 This is a cross-sectional schematic diagram and a partial enlarged view of an embodiment of the plate heat exchanger of this application;

[0018] Figure 6 This is a three-dimensional structural schematic diagram of an embodiment of the dispenser of this application;

[0019] Figure 7 This is an exploded view of an embodiment of the dispenser of this application;

[0020] Figure 8 This is another exploded view of an embodiment of the dispenser in this application;

[0021] Figure 9 This is a plan view of an embodiment of the distribution pipe of this application;

[0022] Figure 10 This is a plan view of another embodiment of the distribution pipe of this application;

[0023] Figure 11This is a cross-sectional schematic diagram of an embodiment of the distribution pipe of this application.

[0024] In the figure, 10 is the heat exchange core; 101 is the first flow channel; 102 is the second flow channel; 103 is the third flow channel; 104 is the fourth flow channel; 105 is the first inter-plate flow channel; 106 is the second inter-plate flow channel; 11 is the heat exchange plate; 111 is the first heat exchange plate; 1111 is the first top wall; 1112 is the first bottom wall; 112 is the second heat exchange plate; 1121 is the second top wall; 1122 is the second bottom wall; 12 is the top plate; 13 is the bottom plate; 14 is the connecting plate; 20 is the distributor; 21 is the distribution pipe; 210 is the distribution pipe cavity; 211 is the first pipe section; 212 is the second pipe section; 2 13. Third pipe section; 214. Distribution hole; 2141. First distribution hole; 2142. Second distribution hole; 215. First pipe opening; 216. Second pipe opening; 22. Baffle; 220. Baffle channel; 221. First baffle; 222. Second baffle; 223. Connecting rod; 224. Baffle plate; 23. Cover plate; 231. Mounting hole; 30. First external pipe; 40. Second external pipe; 50. Third external pipe; 60. Fourth external pipe; L. Length direction of plate heat exchanger; W. Width direction of plate heat exchanger; H. Height direction of plate heat exchanger. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0026] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application, unless the context clearly indicates otherwise. It should be understood that the terms "first," "second," and similar terms used in this specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one; "a plurality of" indicates two or more. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for ease of description only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects.

[0027] The plate heat exchanger of an exemplary embodiment of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other.

[0028] Plate heat exchangers are widely used in thermal management systems. A plate heat exchanger is a high-efficiency heat exchanger assembled from stacked metal plates with corrugated or wavy shapes. A plate heat exchanger consists of multiple alternating heat exchange plates 11, with two independent flow channels formed between adjacent heat exchange plates 11. Specifically, the heat exchange plates 11 include a first heat exchange plate 111 and a second heat exchange plate 112. The first heat exchange plate 111 and the second heat exchange plate 112 are alternately stacked along the height direction H of the plate heat exchanger. A first inter-plate flow channel 105 is formed between the first heat exchange plate 111 and its adjacent second heat exchange plate 112. A second inter-plate flow channel 106 is formed between a heat exchange plate 111 and a second heat exchange plate 112 on the other side. The first inter-plate flow channel 105 and the second inter-plate flow channel 106 are alternately stacked and fluidly isolated. Heat exchange mediums are introduced into the first inter-plate flow channel 105 and the second inter-plate flow channel 106 respectively. Fluid isolation means that the medium flowing into the first inter-plate flow channel 105 and the heat exchange medium flowing into the second inter-plate flow channel 106 are not connected and do not cross-flow. When different heat exchange media flow through the first inter-plate flow channel 105 and the second inter-plate flow channel 106, heat exchange occurs, and the alternating stacked flow channels make the heat exchange effect better. The heat exchange medium includes refrigerant and coolant. The refrigerant can be R134A, HFO-1234YF, R744, etc., and the coolant can be a mixture of ethanol and water or other cooling media. The refrigerant enters the first inter-plate flow channel 105, and the coolant enters the second inter-plate flow channel 106. The refrigerant and coolant flow in their respective channels and exchange heat. The refrigerant can be in liquid, gas, or gas-liquid two-phase states.

[0029] In practical applications, a two-phase refrigerant, consisting of both gas and liquid phases, is usually introduced. However, if the refrigerant is directly introduced into the first inter-plate channel 105 or the second inter-plate channel 106, for example, if the refrigerant is introduced into each of the second inter-plate channels 106, the gaseous refrigerant, being lighter than the liquid refrigerant, will first enter the second inter-plate channel 106 closer to the refrigerant inlet. Therefore, the second inter-plate channels 106 closer to the refrigerant inlet will accumulate more gaseous refrigerant, while the second inter-plate channels 106 farther from the refrigerant inlet will accumulate less gaseous refrigerant. Liquid refrigerant enters through the refrigerant inlet. Due to inertia, the liquid refrigerant possesses a certain impulse, which is converted into pressure upon reaching the end of the refrigerant inlet channel. The pressure at the refrigerant inlet is lower than the pressure at the end, and the pressure gradually increases along the path from the inlet to the end. Therefore, the amount of liquid refrigerant distributed to each of the second inter-plate flow channels 106 exhibits a gradually increasing trend from the refrigerant inlet to the end. Due to the inertia and the impulse of the liquid refrigerant upon entry, more liquid refrigerant flows into the second inter-plate flow channels 106 farther from the refrigerant inlet, while less flows into the second inter-plate flow channels 106 closer to the refrigerant inlet. This results in uneven refrigerant distribution, thus affecting the heat exchange effect.

[0030] To improve refrigerant distribution, a distributor is installed in the refrigerant inlet channel of the plate heat exchanger. The distributor is hollow inside, and its sidewalls have holes corresponding to the second inter-plate channels 106. Since the refrigerant can only enter the corresponding second inter-plate channels 106 through the holes, the uniformity of refrigerant distribution within each second inter-plate channel 106 is improved compared to directly introducing the refrigerant into each channel 106. In related technologies, the distribution pipe 21 of the distributor is a straight distribution pipe 21, forming a straight distribution flow path. The distribution flow path is relatively short, resulting in poor distribution effect.

[0031] According to one possible embodiment of the plate heat exchanger of this application, refer to Figures 1 to 11 As shown, a plate heat exchanger includes a heat exchange core 10 and a distributor 20, which are connected. The heat exchange core 10 includes a plurality of heat exchange plates 11. The plate heat exchanger is defined to have a height direction H. The plurality of heat exchange plates 11 are stacked along the height direction H. The heat exchange core 10 has a first flow channel 101. The distributor 20 is at least partially located in the first flow channel 101.

[0032] The distributor 20 includes a distribution pipe 21, which has a distribution cavity 210 that is connected to the first flow channel 101. The distribution pipe 21 is a U-shaped pipe.

[0033] In this application, the distribution pipe 21 is a U-shaped pipe, forming a U-shaped distribution flow path, which is longer than a straight distribution flow path, thereby improving the distribution effect of the distributor. Furthermore, the U-shaped shape of the distribution pipe 21 allows for a relatively smaller dimension of the distribution pipe 21 in the height direction H of the plate heat exchanger, resulting in a more compact structure.

[0034] Reference Figures 4 to 8 The distribution pipe 21 includes a first pipe section 211, a second pipe section 212, and a third pipe section 213. Both the first and second pipe sections 211 and 212 are connected to the third pipe section 213. The cavities of the first and second pipe sections 211 and 212 are connected to the cavity of the third pipe section 213. The third pipe section 213 is located between the first and second pipe sections 211 and 212. The plate heat exchanger is defined to have a width direction W. Along the width direction W, the first and second pipe sections 211 and 212 are arranged side-by-side. The first and second pipe sections 211 and 212 are arranged in parallel, with a gap between them; in other words, the first and second pipe sections 211 and 212 are arranged parallel and spaced apart. The outer contour of the third pipe section 213 is approximately semi-circular. When the plate heat exchanger is working, the heat exchange medium flows sequentially into the first pipe section 211, the third pipe section 213, and the second pipe section 212, forming a U-shaped distribution flow path, resulting in good distribution effect.

[0035] Reference Figures 4 to 8 The distributor 20 includes a flow-dispersing element 22, which is at least partially located in the distribution cavity 210. The flow-dispersing element 22 is connected to the distribution pipe 21. The flow-dispersing element 22 has a flow-dispersing channel 220 that communicates with the distribution cavity 210. The flow-dispersing channel 220 is a spiral channel. Specifically, the flow-dispersing element 22 includes a connecting rod 223 and a flow-dispersing plate 224. The connecting rod 223 and the flow-dispersing plate 224 are fixedly connected. The flow-dispersing plate 224 is connected to the inner wall of the distribution pipe 21. Specifically, the flow-dispersing plate 224 abuts against the inner wall of the distribution pipe 21. The flow-dispersing plate 224 is spiral in shape. The baffle 22 is designed to ensure that the gas-liquid two-phase refrigerant entering the distribution pipe 21 is mixed evenly, thus improving the uniformity of distribution. The baffle 22 has a spiral baffle channel 220, which improves the mixing effect of the gas-liquid two-phase refrigerant entering the distribution pipe 21. The spiral baffle channel 220 combined with the U-shaped distribution flow path extends the distribution flow path, resulting in a better mixing effect of the gas-liquid two-phase refrigerant and improving the distribution effect of the distributor.

[0036] Specifically, the distributor 20 includes two flow deflectors 22, namely a first flow deflector 221 and a second flow deflector 222. The first flow deflector 221 is located in the cavity of the first pipe section 211 and is fixedly connected to the inner wall of the first pipe section 211. The second flow deflector 222 is located in the cavity of the second pipe section 212 and is fixedly connected to the inner wall of the second pipe section 212. In this embodiment, the structures of the first flow deflector 221 and the second flow deflector 222 are basically the same. Both the first flow deflector 221 and the second flow deflector 222 include a connecting rod 223 and a baffle plate 224, and both the first flow deflector 221 and the second flow deflector 222 have a flow deflection channel 220. The first turbulence element 221 and the second turbulence element 222 are designed to ensure that the gas-liquid two-phase refrigerant entering the distribution pipe 21 can be mixed evenly, thereby improving the distribution uniformity. Both the first turbulence element 221 and the second turbulence element 222 have spiral turbulence channels 220, which further improves the mixing effect of the gas-liquid two-phase refrigerant entering the distribution pipe 21 and further improves the distribution effect of the distributor.

[0037] The distribution pipe 21 is made of metal, resulting in good structural stability. As a single-piece structure, the distribution pipe 21 exhibits excellent overall structural stability. The method of forming the distribution pipe 21 into a single-piece structure is not specifically limited; it can be formed through one or a combination of methods such as stamping, extrusion, casting, powder metallurgy, metal powder injection molding, and 3D printing. Alternatively, it can be formed by stamping, extrusion, casting, powder metallurgy, or metal powder injection molding followed by machining, or it can be directly machined. In an optional embodiment, the distribution pipe 21 is made of a high-temperature and high-pressure resistant resin material, resulting in lower cost and lighter weight.

[0038] Reference Figures 6 to 11 The distribution pipe 21 has multiple distribution holes 214, which are spaced apart. Each distribution hole 214 extends through both sides of the distribution pipe 21 in the thickness direction of its wall, connecting the distribution cavity 210 and the first flow channel 101. The distribution holes 214 are circular, which facilitates processing. The cross-sectional dimension of the distribution pipe 21 is much larger than the size of the distribution holes 214. That is, the distribution cavity 210 is mainly used for the flow of the heat exchange medium, forming a distribution flow channel, while the distribution holes 214 are mainly used for the distribution of the heat exchange medium within the distribution cavity 210. The arrangement of the distribution holes 214 ensures that the heat exchange medium within the distribution cavity 210 can be evenly distributed to the first flow channel 101.

[0039] Specifically, the plurality of distribution holes 214 include first distribution holes 2141 and second distribution holes 2142. The first distribution holes 2141 are located in the first tube section 211, and the plurality of first distribution holes 2141 are spaced apart along the length direction of the first tube section 211. The second distribution holes 2142 are located in the second tube section 212, and the plurality of second distribution holes 2142 are spaced apart along the length direction of the second tube section 212. Optionally, the plurality of first distribution holes 2141 are evenly spaced along the length direction of the first tube section 211, and the plurality of second distribution holes 2142 are evenly spaced along the length direction of the second tube section 212. This allows the heat exchange medium in the distribution tube cavity 210 to be evenly distributed from the distribution holes 214 to the first flow channel 101, thereby improving the distribution uniformity of the distribution tube 21 and improving the distribution effect of the distributor 20.

[0040] The distribution pipe 21 has a first port 215 and a second port 216. The distributor 20 includes a cover plate 23, which is fixedly connected to the heat exchange core 10. The cover plate 23 has a mounting hole 231 that extends through both sides of the cover plate 23 in the thickness direction. The outer contour of the cover plate 23 is circular, and the mounting hole 231 is a circular hole. The first port 215 is circular in shape, and the diameter of the mounting hole 231 is approximately equal to the diameter of the first port 215. The wall containing the first port 215 is at least partially located within the mounting hole 231, and the wall containing the first port 215 is fixedly connected to the wall of the mounting hole 231. The wall containing the second port 216 is fixedly connected to the cover plate 23, and the cover plate 23 closes the second port 216. That is, the cover plate 23 prevents the heat exchange medium from flowing into or out of the second port 216. The heat exchange medium can only flow into the distribution cavity 210 of the distribution pipe 21 from the first pipe opening 215, and is evenly distributed to the first flow channel 101 by multiple distribution holes 214, forming a U-shaped distribution flow path. The cover plate 23 not only seals the second pipe opening 216, but also achieves a fixed connection between the distribution pipe 21, the cover plate 23 and the heat exchange core 10. Moreover, the structure of the cover plate 23 is relatively simple and easy to process.

[0041] Optionally, the number of first distribution holes 2141 is greater than the number of second distribution holes 2142. The minimum distance between the first distribution hole 2141 and the first pipe opening 215 is defined as S1, and the minimum distance between the second distribution hole 2142 and the second pipe opening 216 is defined as S2, where S2 > S1. Since the heat exchange medium generally accumulates more at the end of the distribution pipe 21, i.e., more heat exchange medium accumulates at the second pipe opening 216, the minimum distance between the second distribution hole 2142 and the second pipe opening 216 is greater than the minimum distance between the first distribution hole 2141 and the first pipe opening 215. The second distribution hole 2142 being at a certain distance from the second pipe opening 216 helps improve the uniformity of distribution within the distribution pipe 21.

[0042] Reference Figure 9 and Figure 11The diameter of the distribution orifice 214 gradually decreases along the direction of extension from the wall where the first orifice 215 is located to the wall where the second orifice 216 is located. That is, along the flow direction of the heat exchange medium in the distribution cavity 210 of the distribution pipe 21, the diameter of the distribution orifice 214 gradually decreases. Because the liquid refrigerant has a certain impulse due to inertia, the pressure at the refrigerant inlet is lower than the pressure at the end of the distribution pipe 21. The pressure gradually increases along the path from the refrigerant inlet to the end. In other words, the pressure gradually increases along the path from the first orifice 215 to the second orifice 216. Therefore, along the flow direction of the heat exchange medium in the distribution cavity 210 of the distribution pipe 21, the liquid refrigerant distribution amount shows a gradually increasing trend from the first orifice 215 to the second orifice 216. Therefore, in order to improve this problem, the diameter of the distribution hole 214 is gradually reduced along the flow direction of the heat exchange medium in the distribution cavity 210 of the distribution pipe 21, so that the heat exchange medium in the distribution cavity 210 can be evenly distributed from the distribution hole 214 to the first flow channel 101, thereby improving the distribution uniformity of the distribution pipe 21 and improving the distribution effect of the distributor 20.

[0043] Reference Figure 10 In some possible embodiments, the diameters of the plurality of distribution holes 214 are all equal in the direction extending from the wall where the first port 215 is located to the wall where the second port 216 is located. That is, along the flow direction of the heat exchange medium in the distribution cavity 210 of the distribution pipe 21, the diameters of the plurality of distribution holes 214 are all equal. The equal diameters of the plurality of distribution holes 214 facilitate the processing of the distribution pipe 21, thereby relatively reducing the processing cost of the distribution pipe 21. Thus, the distribution pipe 21 has the advantages of easy processing, low cost, and good distribution effect.

[0044] Reference Figures 1 to 5The plate heat exchanger includes a first external pipe 30, and the heat exchange core 10 includes a top plate 12. The first external pipe 30 is fixedly connected to the heat exchange core 10. The cavity of the first external pipe 30 is connected to the first port 215. The cover plate 23 isolates the cavity of the first external pipe 30 from the second port 216. The cover plate 23 is located between the heat exchange plate 11 and the top plate 12. The heat exchange plate 11 and the top plate 12 are fixedly connected to the cover plate 23 respectively. The heat exchange core 10 includes a bottom plate 13. Along the height direction H of the plate heat exchanger, the top plate 12 and the bottom plate 13 are located on the outermost sides of the heat exchange core 10, respectively. The top plate 12 and the bottom plate 13 are located on both sides of the heat exchange plate 11. The structures of the top plate 12 and the bottom plate 13 are roughly the same, and their thicknesses are roughly the same. The thickness of the top plate 12 is greater than that of the heat exchange plate 11, and the thickness of the bottom plate 13 is greater than that of the heat exchange plate 11. The structural strength of the top plate 12 and the bottom plate 13 is greater than that of the heat exchange plate 11. The top plate 12 and the bottom plate 13 effectively protect the heat exchange plate 11, reducing the possibility of structural deformation and damage to the heat exchange plate 11, thereby improving the structural stability of the plate heat exchanger.

[0045] Reference Figures 1 to 5 The heat exchange core 10 has a first inter-plate flow channel 105 and a second inter-plate flow channel 106, which are isolated from each other. A plurality of heat exchange plates 11 include a first heat exchange plate 111 and a second heat exchange plate 112, which are alternately stacked along the height direction H. The first heat exchange plate 111 includes a first top wall 1111 and a first bottom wall 1112, which are located on opposite sides of the thickness direction of the first heat exchange plate 111. The second heat exchange plate 112 includes a second top wall 1121 and a second bottom wall 1122, which are located on opposite sides of the thickness direction of the second heat exchange plate 112. The first inter-plate flow channel 105 is located between the adjacent first bottom wall 1112 and second top wall 1121, and the second inter-plate flow channel 106 is located between the adjacent second bottom wall 1122 and first top wall 1111. The heat exchange plate 11 is an integral structure made of metal, providing good structural strength. Each second inter-plate flow channel 106 corresponds to a first distribution hole 2141 and a second distribution hole 2142, enabling the heat exchange medium in the distribution pipe cavity 210 to be evenly distributed from the distribution holes 214 to each second inter-plate flow channel 106, thereby improving the distribution uniformity of the distribution pipe 21 and enhancing the distribution effect of the distributor 20.

[0046] The heat exchange core 10 has a second flow channel 102, a third flow channel 103, and a fourth flow channel 104. The first flow channel 101 extends through both sides of the heat exchange plate 11 in the thickness direction, the second flow channel 102 extends through both sides of the heat exchange plate 11 in the thickness direction, the third flow channel 103 extends through both sides of the heat exchange plate 11 in the thickness direction, and the fourth flow channel 104 extends through both sides of the heat exchange plate 11 in the thickness direction. The plate heat exchanger is defined to have a length direction L. Along the length direction L, the first flow channel 101 and the third flow channel 103 are spaced apart, and the second flow channel 102 and the fourth flow channel 104 are spaced apart. Along the width direction W, the first flow channel 101 and the second flow channel 102 are spaced apart, and the third flow channel 103 and the fourth flow channel 104 are spaced apart. A second inter-plate flow channel 106 connects the first flow channel 101 and the third flow channel 103, and a first inter-plate flow channel 105 connects the second flow channel 102 and the fourth flow channel 104.

[0047] Specifically, all heat exchange plates 11 have first corner holes, second corner holes, third corner holes, and fourth corner holes, which are located at the four corners of the heat exchange plate 11. These holes extend through both sides of the heat exchange plate 11 along its thickness direction. Along the length L of the plate heat exchanger, the first and third corner holes are spaced apart, as are the second and fourth corner holes. Along the width W of the plate heat exchanger, the first and second corner holes are spaced apart, as are the third and fourth corner holes. All the first corner holes of the heat exchange plates 11 are one-to-one correspondences and interconnected, forming a first flow channel 101. All the second corner holes of the heat exchange plates 11 are one-to-one correspondences and interconnected, forming a second flow channel 102. All the third corner holes of the heat exchange plates 11 are one-to-one correspondences and interconnected, forming a third flow channel 103. All the fourth corner holes of the heat exchange plates 11 are one-to-one correspondences and interconnected, forming a fourth flow channel 104.

[0048] The plate heat exchanger includes a first external pipe 30, a second external pipe 40, a third external pipe 50, and a fourth external pipe 60. All four external pipes are fixedly connected to the heat exchange core 10. Specifically, the heat exchange core 10 includes a connecting plate 14, which is fixedly connected to the top plate 12. All four external pipes are fixedly connected to the connecting plate 14. The lumen of the first external pipe 30 communicates with the distribution lumen 210 of the distribution pipe 21; the lumen of the second external pipe 40 communicates with the second flow channel 102; the lumen of the third external pipe 50 communicates with the third flow channel 103; and the lumen of the fourth external pipe 60 communicates with the fourth flow channel 104.

[0049] Reference Figures 1 to 5In this embodiment, when the plate heat exchanger is working, the gas-liquid two-phase refrigerant flows from the cavity of the first external pipe 30 into the distribution cavity 210 of the distribution pipe 21, and then into the turbulence channel 220 of the turbulence member 22, so that the gas-liquid two-phase refrigerant is mixed evenly. The refrigerant in the turbulence channel 220 is evenly distributed to the first flow channel 101 by the multiple distribution holes 214 of the distribution pipe 21. The refrigerant flows through multiple second inter-plate flow channels 106 and into the third flow channel 103, and finally flows out of the plate heat exchanger from the cavity of the third external pipe 50. At the same time, the coolant flows from the cavity of the fourth external pipe 60 into the fourth flow channel 104, flows through multiple first inter-plate flow channels 105 and into the second flow channel 102, and finally flows out of the plate heat exchanger from the cavity of the second external pipe 40. The coolant in the first inter-plate flow channel 105 and the refrigerant in the second inter-plate flow channel 106 exchange heat.

[0050] Along the length L of the plate heat exchanger, the coolant flow direction of the first inter-plate flow channel 105 is opposite to the refrigerant flow direction of the second inter-plate flow channel 106, forming a layered convection, which is beneficial to improving the heat exchange effect of the plate heat exchanger.

[0051] In some possible embodiments, reference is made to Figures 1 to 11 As shown, a plate heat exchanger includes a heat exchange core 10 and a distributor 20, which are connected. The heat exchange core 10 includes a plurality of heat exchange plates 11. The plate heat exchanger is defined to have a height direction H. The plurality of heat exchange plates 11 are stacked along the height direction H. The heat exchange core 10 has a first flow channel 101. The distributor 20 is at least partially located in the first flow channel 101.

[0052] The distributor 20 includes a distribution pipe 21, which has a distribution cavity 210. The distribution cavity 210 is connected to the first flow channel 101. The distribution pipe 21 includes a first pipe section 211, a second pipe section 212, and a third pipe section 213. The first pipe section 211 and the second pipe section 212 are both connected to the third pipe section 213. The cavities of the first pipe section 211 and the second pipe section 212 are both connected to the cavity of the third pipe section 213. The third pipe section 213 is located between the first pipe section 211 and the second pipe section 212. The plate heat exchanger is defined to have a width direction W. Along the width direction W, the first pipe section 211 and the second pipe section 212 are arranged side by side.

[0053] In this application, the distribution pipe 21 includes a first pipe section 211, a second pipe section 212, and a third pipe section 213. The first pipe section 211 and the second pipe section 212 are arranged side by side along the width direction W of the plate heat exchanger, and the third pipe section 213 connects the cavity of the first pipe section 211 and the cavity of the second pipe section 212 to form a non-linear distribution flow path. Compared with the linear distribution flow path, the flow path is longer, which improves the distribution effect of the distributor.

[0054] It should be understood that the integral structure in this application refers to a component manufactured through one or more of the following processes: stamping, extrusion, casting, powder metallurgy, metal powder injection molding, and 3D printing. It can also be formed by machining after stamping, extrusion, casting, powder metallurgy, or metal powder injection molding, or directly machined without welding, gluing, or other joining processes. The methods of fixing and installing together in this application include, but are not limited to, at least one of brazing, gluing, and bracket fixing. It should be understood that in this application, the "connection" between two components can be a direct connection or an indirect connection through other components.

[0055] The above are merely preferred technical solutions of this application and are not intended to limit this application in any way. Although this application has disclosed preferred technical solutions as above, they are not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent technical solutions without departing from the scope of the technical solutions of this application. Any simple modifications, equivalent changes, and alterations made to the above technical solutions based on the technical essence of this application without departing from the content of the technical solutions of this application shall still fall within the scope of the technical solutions of this application.

Claims

1. A plate heat exchanger, characterized in that The plate heat exchanger comprises a heat exchange core (10) and a distributor (20), the heat exchange core (10) and the distributor (20) are connected, the heat exchange core (10) comprises a plurality of heat exchange plates (11), the plate heat exchanger has a height direction (H), the plurality of heat exchange plates (11) are arranged in a stacked manner along the height direction (H), the heat exchange core (10) has a first flow channel (101), and the distributor (20) is at least partially located in the first flow channel (101). The distributor (20) comprises a distribution pipe (21), the distribution pipe (21) has a distribution pipe cavity (210), the distribution pipe cavity (210) is in communication with the first flow channel (101), and the distribution pipe (21) is a U-shaped pipe.

2. The plate heat exchanger according to claim 1, characterized in that The distributor (20) comprises a spoiler (22), the spoiler (22) is at least partially located in the distribution pipe cavity (210), the spoiler (22) is connected with the distribution pipe (21), the spoiler (22) has a spoiler channel (220), the spoiler channel (220) is in communication with the distribution pipe cavity (210), and the spoiler channel (220) is a spiral channel. The distribution pipe (21) is an integral structure.

3. The plate heat exchanger according to claim 2, characterized in that The spoiler (22) comprises a connecting rod (223) and a spoiler plate (224), the connecting rod (223) and the spoiler plate (224) are fixedly connected, the spoiler plate (224) is connected with an inner pipe wall of the distribution pipe (21), and the spoiler plate (224) is spiral-shaped.

4. The plate heat exchanger according to claim 3, characterized in that The distribution pipe (21) has a plurality of distribution holes (214), the plurality of distribution holes (214) are arranged at intervals, the distribution holes (214) pass through two sides in the thickness direction of the pipe wall of the distribution pipe (21), and the distribution holes (214) are in communication with the distribution pipe cavity (210) and the first flow channel (101).

5. The plate heat exchanger according to claim 4, characterized in that The distribution pipe (21) has a first pipe opening (215) and a second pipe opening (216), the distributor (20) comprises a cover plate (23), the cover plate (23) is fixedly connected with the heat exchange core (10), the cover plate (23) has a mounting hole (231), a wall, on which the first pipe opening (215) is located, is at least partially located in the mounting hole (231), the wall, on which the first pipe opening (215) is located, is fixedly connected with a hole wall of the mounting hole (231), a wall, on which the second pipe opening (216) is located, is fixedly connected with the cover plate (23), and the cover plate (23) closes the second pipe opening (216). In an extension direction from the wall, on which the first pipe opening (215) is located, to the wall, on which the second pipe opening (216) is located, the distribution holes (214) gradually decrease in diameter, or the plurality of distribution holes (214) are equal in diameter.

6. The plate heat exchanger according to claim 5, characterized in that The plate heat exchanger comprises a first external pipe (30), the heat exchange core (10) comprises a top plate (12), the first external pipe (30) is fixedly connected with the heat exchange core (10), the lumen of the first external pipe (30) is communicated with the first pipe opening (215), the cover plate (23) isolates the lumen of the first external pipe (30) and the second pipe opening (216), the cover plate (23) is located between the heat exchange plate (11) and the top plate (12), and the heat exchange plate (11) and the top plate (12) are fixedly connected with the cover plate (23) respectively.

7. The plate heat exchanger according to claim 4, characterized in that The distribution pipe (21) comprises a first pipe portion (211), a second pipe portion (212) and a third pipe portion (213), the first pipe portion (211) and the second pipe portion (212) are connected with the third pipe portion (213), the lumens of the first pipe portion (211) and the second pipe portion (212) are connected with the lumen of the third pipe portion (213), and the third pipe portion (213) is located between the first pipe portion (211) and the second pipe portion (212) and defines a width direction (W) of the plate heat exchanger, along the width direction (W), the first pipe portion (211) and the second pipe portion (212) are arranged side by side.

8. The plate heat exchanger according to claim 7, characterized in that The first pipe portion (211) and the second pipe portion (212) are arranged in parallel and have a gap therebetween; A plurality of the distribution holes (214) comprise first distribution holes (2141) and second distribution holes (2142), the first distribution holes (2141) are located in the first pipe portion (211), a plurality of the first distribution holes (2141) are arranged at intervals along the length direction of the first pipe portion (211), the second distribution holes (2142) are located in the second pipe portion (212), and a plurality of the second distribution holes (2142) are arranged at intervals along the length direction of the second pipe portion (212); The distributor (20) comprises two turbulence generators (22), the two turbulence generators (22) are a first turbulence generator (221) and a second turbulence generator (222) respectively, the first turbulence generator (221) is located in the lumen of the first pipe portion (211) and connected with the inner pipe wall of the first pipe portion (211), and the second turbulence generator (222) is located in the lumen of the second pipe portion (212) and connected with the inner pipe wall of the second pipe portion (212).

9. A plate heat exchanger according to any one of claims 1 to 8, characterised in that The heat exchange core (10) has a first inter-plate flow channel (105) and a second inter-plate flow channel (106), and the first inter-plate flow channel (105) and the second inter-plate flow channel (106) are isolated from each other. The plurality of heat exchange plates (11) comprises a first heat exchange plate (111) and a second heat exchange plate (112), the first heat exchange plate (111) and the second heat exchange plate (112) are alternately stacked along the height direction (H), the first heat exchange plate (111) comprises a first top wall (1111) and a first bottom wall (1112), the first top wall (1111) and the first bottom wall (1112) are located on both sides of the thickness direction of the first heat exchange plate (111) respectively, the second heat exchange plate (112) comprises a second top wall (1121) and a second bottom wall (1122), the second top wall (1121) and the second bottom wall (1122) are located on both sides of the thickness direction of the second heat exchange plate (112) respectively; The first inter-plate flow channel (105) is located between the adjacent first bottom wall (1112) and the second top wall (1121), and the second inter-plate flow channel (106) is located between the adjacent second bottom wall (1122) and the first top wall (1111).

10. The plate heat exchanger according to claim 9, characterized in that The heat exchange core (10) has a second flow channel (102), a third flow channel (103) and a fourth flow channel (104), the first flow channel (101) penetrates both sides of the thickness direction of the heat exchange plate (11), the second flow channel (102) penetrates both sides of the thickness direction of the heat exchange plate (11), the third flow channel (103) penetrates both sides of the thickness direction of the heat exchange plate (11), and the fourth flow channel (104) penetrates both sides of the thickness direction of the heat exchange plate (11); The plate heat exchanger is defined to have a length direction (L), along the length direction (L), the first flow channel (101) and the third flow channel (103) are arranged at intervals, and the second flow channel (102) and the fourth flow channel (104) are arranged at intervals; Along the width direction (W), the first flow channel (101) and the second flow channel (102) are arranged at intervals, and the third flow channel (103) and the fourth flow channel (104) are arranged at intervals; The second inter-plate flow channel (106) communicates the first flow channel (101) and the third flow channel (103), and the first inter-plate flow channel (105) communicates the second flow channel (102) and the fourth flow channel (104).

11. A plate heat exchanger, characterized in that The plate heat exchanger comprises a heat exchange core (10) and a distributor (20), the heat exchange core (10) and the distributor (20) are connected, the heat exchange core (10) comprises a plurality of heat exchange plates (11), the plate heat exchanger is defined to have a height direction (H), a plurality of heat exchange plates (11) are arranged in the height direction (H), the heat exchange core (10) has a first flow channel (101), and the distributor (20) is at least partially located in the first flow channel (101); The distributor (20) comprises a distribution pipe (21) having a distribution pipe cavity (210) in communication with the first flow channel (101), the distribution pipe (21) comprising a first pipe section (211), a second pipe section (212) and a third pipe section (213), the first pipe section (211) and the second pipe section (212) are both connected with the third pipe section (213), the pipe cavity of the first pipe section (211) and the pipe cavity of the second pipe section (212) are both connected with the pipe cavity of the third pipe section (213), the third pipe section (213) is located between the first pipe section (211) and the second pipe section (212), defining the plate heat exchanger has a width direction (W), along the width direction (W), the first pipe section (211) and the second pipe section (212) are arranged side by side.

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