Plate heat exchanger assembly and air conditioning system

Abstract

The utility model discloses a plate heat exchanger subassembly and air conditioning system, plate heat exchanger subassembly includes: plate heat exchanger and throttling component, and the first heat exchange flow channel and second heat exchange flow channel that mutually cut off and mutually exchange heat are formed in plate heat exchanger, and plate heat exchanger is equipped with first interface, second interface, third interface and fourth interface, throttling component is located in plate heat exchanger and includes first throttling ware and second throttling ware, and throttling component includes first inlet and outlet, second inlet and outlet, third inlet and outlet and fourth inlet and outlet, and first inlet and outlet are connected with second interface, and fourth inlet and outlet are connected with third interface. According to the plate heat exchanger subassembly of the utility model embodiment, by installing first throttling ware and second throttling ware on plate heat exchanger, can reduce the length of the connecting pipeline between first throttling ware and second throttling ware and plate heat exchanger, improve pipeline reliability.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment, and in particular to a plate heat exchanger assembly and an air conditioning system. Background Technology

[0002] In related technologies, in air conditioning systems that include throttling components such as dual electronic expansion valves and plate heat exchangers, the connecting pipes between the throttling components and the plate heat exchangers are relatively long. This results in a large space occupied by the connecting pipes, as well as numerous welding processes between the pipes, increasing the risk of weld leaks. Furthermore, the long pipes are prone to vibration-induced breakage. Therefore, improvements are needed. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a plate heat exchanger assembly that integrates the plate heat exchanger, the first throttling device, and the second throttling device by installing both the first and second throttling devices on the plate heat exchanger. This reduces the length of the connecting pipes between the first and second throttling devices and the plate heat exchanger, which helps reduce the space occupied by the connecting pipes, reduces the number of welding steps and the risk of weld leakage, reduces the risk of pipe vibration stress fracture, and improves pipe reliability. Furthermore, it allows for a compact structure of the plate heat exchanger assembly, reducing the space occupied by the plate heat exchanger assembly.

[0004] This utility model also proposes an air conditioning system including the above-mentioned plate heat exchanger assembly.

[0005] A plate heat exchanger assembly according to a first aspect of the present invention includes: a plate heat exchanger having a first heat exchange channel and a second heat exchange channel formed therein, which are mutually isolated and exchange heat with each other; the plate heat exchanger having a first interface, a second interface, a third interface, and a fourth interface; one of the first interface and the second interface serving as the inlet of the first heat exchange channel and the other serving as the outlet of the first heat exchange channel; one of the third interface and the fourth interface serving as the inlet of the second heat exchange channel and the other serving as the outlet of the second heat exchange channel; and a throttling device assembly disposed in the plate heat exchanger and including a first throttling device and a second throttling device, the throttling device assembly including a first inlet / outlet, a second inlet / outlet, a third inlet / outlet, and a fourth inlet / outlet; one of the first inlet / outlet and the second inlet / outlet serving as the inlet of the first throttling device and the other serving as the outlet of the first throttling device; the first inlet / outlet being connected to the second interface; one of the third inlet / outlet and the fourth inlet / outlet serving as the inlet of the second throttling device and the other serving as the outlet of the second throttling device; the third inlet / outlet being connected to the second interface; and the fourth inlet / outlet being connected to the third interface.

[0006] According to the plate heat exchanger assembly of this utility model embodiment, by installing both the first throttling device and the second throttling device on the plate heat exchanger, the plate heat exchanger, the first throttling device, and the second throttling device are integrated together. This can reduce the length of the connecting pipes between the first throttling device and the second throttling device and the plate heat exchanger, which is beneficial to reducing the space occupied by the connecting pipes, reducing the number of pipe welding processes, reducing the risk of weld leakage, reducing the risk of pipe vibration stress fracture, and improving pipe reliability. Furthermore, it can make the structure of the plate heat exchanger assembly compact and reduce the space occupied by the plate heat exchanger assembly.

[0007] According to some embodiments of the present invention, the first throttling device and the second throttling device are arranged along the width direction of the plate heat exchanger.

[0008] According to some embodiments of the present invention, the angle between the axis of the first throttling device and the length direction of the plate heat exchanger is α1, and the angle between the axis of the second throttling device and the length direction of the plate heat exchanger is α2, where 0° < α1 < 180° and / or 0° < α2 < 180°.

[0009] According to some embodiments of the present invention, 5° < α1 < 60°; and / or, 5° < α2 < 60°.

[0010] According to some embodiments of this utility model, the absolute value of the difference between α1 and α2 is less than 60°.

[0011] According to some embodiments of the present invention, the angle between the axis of the first throttle and the axis of the second throttle is θ, where 0° < θ < 180°.

[0012] According to some embodiments of this utility model, 5° < θ < 90°.

[0013] According to some embodiments of the present invention, the plate heat exchanger includes a plurality of heat exchange plates and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and the first throttling device and the second throttling device are both disposed on the planar portion. The angle between the projections of the axis of the first throttling device and the axis of the second throttling device onto the plane where the planar portion is located is α, where 0°≤α≤60°.

[0014] According to some embodiments of the present invention, the plate heat exchanger includes a plurality of heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and both the first throttling device and the second throttling device are disposed on the planar portion. The angle between the axis of the first throttling device and the plane containing the planar portion is b, -30°≤b≤30°; and / or, the angle between the axis of the second throttling device and the plane containing the planar portion is c, -30°≤c≤30°.

[0015] According to some embodiments of the present invention, the plate heat exchanger is arranged vertically or inclined, the first throttle includes an electronic expansion valve, the first throttle includes a first coil portion and a first valve core, the first coil portion is disposed above or obliquely above the first valve core; and / or the plate heat exchanger is arranged vertically or inclined, the second throttle includes an electronic expansion valve, the second throttle includes a second coil portion and a second valve core, the second coil portion is disposed above or obliquely above the second valve core.

[0016] According to some embodiments of the present invention, the plate heat exchanger includes a plurality of heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, a first throttle is disposed on the planar portion, the first throttle includes an electronic expansion valve, and the projection of the first coil portion of the first throttle on the plane where the planar portion is located at least partially covers the planar portion; and / or, the plate heat exchanger includes a plurality of heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, a second throttle is disposed on the planar portion, the second throttle includes an electronic expansion valve, and the projection of the second coil portion of the second throttle on the plane where the planar portion is located at least partially covers the planar portion.

[0017] According to some embodiments of the present invention, the line connecting the center of the first interface and the center of the second interface is the first connecting line, the line connecting the center of the third interface and the center of the fourth interface is the second connecting line, the angle between the axis of the first throttle and the first connecting line is β1, the angle between the axis of the second throttle and the second connecting line is β2, and 0° < β1 < 180° and / or 0° < β2 < 180°.

[0018] According to some embodiments of the present invention, 5° < β1 < 60°; and / or, 5° < β2 < 60°.

[0019] According to some embodiments of this utility model, the absolute value of the difference between β1 and β2 is less than 60°.

[0020] According to some embodiments of the present invention, the plate heat exchanger has a first end and a second end disposed opposite to each other, the first interface and the fourth interface are located at the first end of the plate heat exchanger, and the second interface and the third interface are located at the second end of the plate heat exchanger.

[0021] According to some embodiments of the present invention, the first end and the second end of the plate heat exchanger are located at both ends in the length direction of the plate heat exchanger, the line connecting the center of the first interface and the center of the second interface is the first connecting line, the line connecting the center of the third interface and the center of the fourth interface is the second connecting line, and the first connecting line and the second connecting line are arranged at intervals along the width direction of the plate heat exchanger.

[0022] According to some embodiments of the present invention, a temperature sensor is also included, which is used to detect the refrigerant temperature at the third interface.

[0023] According to some embodiments of the present invention, the plate heat exchanger assembly includes a second filter connected to the first interface; and / or, the plate heat exchanger assembly includes a first filter connected to the second inlet and outlet.

[0024] According to some embodiments of the present invention, the throttle assembly further includes a flow path connection module, the flow path connection module having a first flow channel and a second flow channel, the flow path connection module being disposed on the plate heat exchanger, one end of the first flow channel being connected to the second interface, the other end of the first flow channel being used to connect to the piping of the air conditioning system, one end of the second flow channel being connected to the first flow channel, and the other end of the second flow channel being connected to the third interface.

[0025] According to some embodiments of the present invention, a first throttling cavity is formed in the first flow channel, the first throttler is disposed in the flow path connection module, the first valve core of the first throttler is disposed in the first throttling cavity, and the first inlet and outlet and the second inlet and outlet are both located in the first flow channel and correspond to the two ends of the first throttling cavity respectively; a second throttling cavity is formed in the second flow channel, the second throttler is disposed in the flow path connection module, the second valve core of the second throttler is disposed in the second throttling cavity, and the third inlet and outlet and the fourth inlet and outlet are both located in the second flow channel and correspond to the two ends of the second throttling cavity respectively.

[0026] According to some embodiments of the present invention, the plate heat exchanger assembly includes a first filter, and the flow path connection module further includes a filter cavity disposed in the first flow channel. The filter cavity is formed at one end of the first throttling cavity away from the second interface. The first filter is disposed in the filter cavity, and the end of the filter cavity away from the first throttling cavity is used to communicate with the piping of the air conditioning system.

[0027] According to some embodiments of the present invention, a temperature sensor is also included, which is installed on the flow path connection module and used to detect the refrigerant temperature at the third interface.

[0028] An air conditioning system according to a second aspect of the present invention includes: an indoor heat exchanger; an outdoor heat exchanger; and a compressor, wherein both the indoor heat exchanger and the outdoor heat exchanger are connected to the compressor; and a plate heat exchanger assembly according to a first aspect of the present invention, wherein the first interface is connected to the indoor heat exchanger and the fourth interface is connected to the compressor.

[0029] The air conditioning system according to the present invention includes a plate heat exchanger assembly according to the first aspect of the present invention. This plate heat exchanger assembly integrates the plate heat exchanger, the first throttling device, and the second throttling device by mounting both the first and second throttling devices on the plate heat exchanger. This reduces the length of the connecting pipes between the first and second throttling devices and the plate heat exchanger, which helps reduce the space occupied by the connecting pipes, reduces the number of welding steps, lowers the risk of weld leakage, reduces the risk of pipe vibration stress fracture, and improves pipe reliability. Furthermore, it allows for a compact structure of the plate heat exchanger assembly, reducing the space occupied by the plate heat exchanger assembly.

[0030] According to some embodiments of this utility model, it also includes a four-way valve, which has a first valve port, a second valve port, a third valve port and a fourth valve port. The first valve port is connected to the exhaust port of the compressor, the second valve port is connected to the indoor heat exchanger, the third valve port is connected to both the return port of the compressor and the fourth interface, and the fourth valve port is connected to the outdoor heat exchanger.

[0031] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a schematic diagram illustrating the working principle of an air conditioning system according to some embodiments of the present invention;

[0034] Figure 2 This is a perspective view of a plate heat exchanger assembly according to some embodiments of the present invention;

[0035] Figure 3 yes Figure 2 A top view of the plate heat exchanger assembly in the image;

[0036] Figure 4 This is a schematic diagram illustrating the working principle of a plate heat exchanger assembly according to some embodiments of the present invention.

[0037] Figure label:

[0038] 100. Air conditioning system;

[0039] 1. Plate heat exchanger assembly;

[0040] 11. Plate heat exchanger; 110. Heat exchange plate; 1101. First plate; 1102. Second plate; 1103. Planar part; 111. First interface; 112. Second interface; 113. Third interface; 114. Fourth interface; 115. First connection; 116. Second connection; 117. First end; 118. Second end;

[0041] 12. First throttle; 120. First inlet / outlet; 121. Second inlet / outlet; 122. First fastener;

[0042] 13. Second throttle; 131. Third inlet / outlet; 132. Fourth inlet / outlet; 133. Second fastener;

[0043] 14. Flow path connection module; 141. First flow path connection module; 142. Second flow path connection module; 143. Third flow path connection module; 15. Temperature sensor; 16. Second filter; 17. First filter;

[0044] 2. Indoor heat exchanger; 3. Outdoor heat exchanger; 4. Compressor; 41. Exhaust port; 42. Return port; 5. Four-way valve; 51. First valve port; 52. Second valve port; 53. Third valve port; 54. Fourth valve port. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] The following is for reference. Figures 1-4 This invention describes a plate heat exchanger assembly according to an embodiment of the present invention.

[0047] According to a first aspect of the present invention, a plate heat exchanger assembly 1 includes: a plate heat exchanger 11, a first throttle 12, and a second throttle 13.

[0048] The plate heat exchanger 11 has a first heat exchange channel and a second heat exchange channel that are isolated from each other and exchange heat with each other. The plate heat exchanger 11 is provided with a first interface 111, a second interface 112, a third interface 113 and a fourth interface 114. One of the first interface 111 and the second interface 112 serves as the inlet of the first heat exchange channel and the other serves as the outlet of the first heat exchange channel. One of the third interface 113 and the fourth interface 114 serves as the inlet of the second heat exchange channel and the other serves as the outlet of the second heat exchange channel.

[0049] A throttling device assembly is provided on the plate heat exchanger 11. The throttling device assembly includes a first throttling device 12 and a second throttling device 13. The throttling device assembly includes a first inlet / outlet 120, a second inlet / outlet 121, a third inlet / outlet 131, and a fourth inlet / outlet 132.

[0050] One of the first inlet / outlet 120 and the second inlet / outlet 121 serves as the inlet of the first throttle 12, and the other of the first inlet / outlet 120 and the second inlet / outlet 121 serves as the outlet of the first throttle 12. The first inlet / outlet 120 is connected to the second interface 112. One of the third inlet / outlet 131 and the fourth inlet / outlet 132 serves as the inlet of the second throttle 13, and the other of the third inlet / outlet 131 and the fourth inlet / outlet 132 serves as the outlet of the second throttle 13. The first inlet / outlet 120 is connected to the second interface 112, and the fourth inlet / outlet 132 is connected to the third interface 113.

[0051] By installing both the first throttling device 12 and the second throttling device 13 on the plate heat exchanger 11, the plate heat exchanger 11, the first throttling device 12, and the second throttling device 13 are integrated together. This reduces the length of the connecting pipes between the first throttling device 12 and the second throttling device 13 and the plate heat exchanger 11. This helps to reduce the space occupied by the connecting pipes, reduce the number of welding processes, reduce the risk of weld leakage, reduce the risk of pipe vibration stress fracture, and improve pipe reliability. Furthermore, it allows for a more compact structure of the plate heat exchanger assembly 1, reducing the space occupied by the plate heat exchanger assembly 1. For example, the first throttling device 12 is fixedly connected to the plate heat exchanger 11 by fasteners, and the second throttling device 13 is fixedly connected to the plate heat exchanger 11 by fasteners.

[0052] By forming a first heat exchange channel and a second heat exchange channel that are mutually isolated and exchange heat with each other in the plate heat exchanger 11, two refrigerants of different temperatures can flow through the plate heat exchanger 11 at the same time. The two refrigerants of different temperatures can exchange heat with each other, and the direction of refrigerant flow can be changed according to whether the air conditioning system 100 is in heating mode or cooling mode.

[0053] For example, refer to Figure 4 , Figure 4The dashed arrows indicate the direction of refrigerant flow when the air conditioning system 100 is in heating mode. After the refrigerant is discharged from the exhaust port 41 of the compressor 4, it flows through the indoor heat exchanger 2. The refrigerant flowing out of the indoor heat exchanger 2 enters the first heat exchange channel of the plate heat exchanger 11 through the first interface 111. After exchanging temperature with the refrigerant in the second heat exchange channel in the first heat exchange channel, it flows out of the plate heat exchanger 11 through the second interface 112. The refrigerant flowing out of the plate heat exchanger 11 from the second port 112 is divided into two paths. One path enters the second throttling device 13 through the third inlet / outlet 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth inlet / outlet 132. At this time, the refrigerant temperature is reduced due to the throttling effect of the second throttling device 13. It then enters the second heat exchange channel of the plate heat exchanger 11 through the third port 113. The temperature of the refrigerant in the second heat exchange channel is lower than that of the refrigerant in the first heat exchange channel. The refrigerant in the first heat exchange channel heats up the refrigerant in the second heat exchange channel. Then it flows out of the plate heat exchanger 11 through the fourth port 114 and then flows into the compressor 4. The other path of refrigerant enters the first throttling device 12 through the first inlet / outlet 120. After being throttled by the first throttling device 12, it flows out of the first throttling device 12 through the second inlet / outlet 121. Then it flows through the outdoor heat exchanger 3 and then flows into the compressor 4 through the return port 42 of the compressor 4.

[0054] For example, when the air conditioning system 100 is in heating mode, by raising the temperature of the refrigerant in the first heat exchange channel to the refrigerant in the second heat exchange channel, the temperature of the refrigerant entering the compressor 4 can be increased, which can prevent liquid slugging, ensure the efficient operation of the compressor 4, and also play a certain role in replenishing gas and increasing enthalpy for the compressor 4.

[0055] For example, refer to Figure 4 , Figure 4The solid arrows indicate the refrigerant flow direction when the air conditioning system 100 is in cooling mode. After being discharged from the compressor 4, the refrigerant flows through the outdoor heat exchanger 3. The refrigerant exiting the outdoor heat exchanger 3 enters the first throttling device 12 through the second inlet / outlet 121. After being throttled by the first throttling device 12, it exits through the first inlet / outlet 120. The refrigerant exiting the first throttling device 12 splits into two paths. One path enters the second throttling device 13 through the third inlet / outlet 131. After being throttled by the second throttling device 13, it exits through the fourth inlet / outlet 132. At this point, the refrigerant temperature decreases due to the throttling effect of the second throttling device 13, and it enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel. One refrigerant cools the refrigerant in the first heat exchange channel, then leaves the plate heat exchanger 11 through the fourth port 114 and finally enters the compressor 4; the other refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the second port 112, cools the refrigerant in the second heat exchange channel, then leaves the plate heat exchanger 11 through the first port 111, and then enters the indoor heat exchanger 2, flows through the indoor heat exchanger 2 and enters the compressor 4 through the return port 42 of the compressor 4.

[0056] When the air conditioning system 100 is in cooling mode, the refrigerant in the first heat exchange channel is cooled by the refrigerant in the second heat exchange channel. This increases the subcooling of the refrigerant in the first heat exchange channel, lowers the temperature of the refrigerant in the first heat exchange channel, and ultimately makes the temperature of the refrigerant entering the indoor heat exchanger 2 even lower, thereby improving the heat exchange performance of the indoor heat exchanger 2 and enhancing the temperature regulation capability of the air conditioning system 100.

[0057] According to the plate heat exchanger assembly 1 of the present utility model embodiment, by installing both the first throttling device 12 and the second throttling device 13 on the plate heat exchanger 11, the plate heat exchanger 11, the first throttling device 12 and the second throttling device 13 are integrated together, which can reduce the length of the connecting pipe between the first throttling device 12 and the second throttling device 13 and the plate heat exchanger 11. This is beneficial to reduce the space occupied by the connecting pipe, reduce the pipe welding process, reduce the risk of weld leakage, reduce the risk of pipe vibration stress fracture, and improve the reliability of the pipe. Furthermore, it can make the structure of the plate heat exchanger assembly 1 compact and reduce the space occupied by the plate heat exchanger assembly 1.

[0058] According to some embodiments of this utility model, refer to Figure 2 and Figure 3The first throttling device 12 and the second throttling device 13 are arranged along the width direction of the plate heat exchanger 11. By arranging the first throttling device 12 and the second throttling device 13 along the width direction of the plate heat exchanger 11, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the space occupied by the plate heat exchanger assembly 1.

[0059] According to some embodiments of this utility model, refer to Figure 3 The angle between the axis of the first throttle 12 and the length direction of the plate heat exchanger 11 is α1, where 0° < α1 < 180°. For example, the axis of the first throttle 12 can be the axis of the valve core of the first throttle 12, and the axis of the first throttle 12 is L1. The value of α1 can be 5°, 10°, 30°, 45°, 60°, 75°, 90°, 120°, 135°, 160°, etc. By ensuring that the angle α1 between the axis of the first throttle 12 and the length direction of the plate heat exchanger 11 satisfies 0° < α1 < 180°, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the space occupied by the plate heat exchanger assembly 1.

[0060] According to some embodiments of this utility model, refer to Figure 3 The angle between the axis of the second throttle 13 and the length direction of the plate heat exchanger 11 is α2, where 0° < α2 < 180°. For example, the axis of the second throttle 13 can be the axis of the valve core of the first throttle 13, and the axis of the second throttle 13 is L2. The value of α2 can be 5°, 10°, 30°, 45°, 60°, 75°, 90°, 120°, 135°, 160°, etc. By ensuring that the angle α2 between the axis of the second throttle 13 and the length direction of the plate heat exchanger 11 satisfies 0° < α2 < 180°, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the space occupied by the plate heat exchanger assembly 1.

[0061] For example, the angle α1 between the axis of the first throttle 12 and the length direction of the plate heat exchanger 11 satisfies 0° < α1 < 180°, and the angle α2 between the axis of the second throttle 13 and the length direction of the plate heat exchanger 11 satisfies 0° < α2 < 180°.

[0062] According to some embodiments of this utility model, refer to Figure 35° < α1 < 60°. For example, the value of α1 can be 6°, 10°, 20°, 30°, 40°, 45°, 50°, 59°, etc. By ensuring that the angle α1 between the axis of the first throttling device 12 and the length direction of the plate heat exchanger 11 is 5° < α1, the axis of the first throttling device 12 can be tilted relative to the length direction of the plate heat exchanger 11, making the internal structure of the plate heat exchanger assembly 1 more compact. By ensuring that the angle α1 between the axis of the first throttling device 12 and the length direction of the plate heat exchanger 11 is α1 < 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, avoiding the plate heat exchanger assembly 1 from occupying too much space and being difficult to install due to the excessive tilt angle of the axis of the first throttling device 12 relative to the length direction of the plate heat exchanger 11.

[0063] According to some embodiments of this utility model, refer to Figure 3 5° < α2 < 60°. For example, the value of α2 can be 6°, 10°, 20°, 30°, 40°, 45°, 50°, 59°, etc. By ensuring that the angle α2 between the axis of the second throttling device 13 and the length direction of the plate heat exchanger 11 is 5° < α2, the axis of the second throttling device 13 can be tilted relative to the length direction of the plate heat exchanger 11, making the internal structure of the plate heat exchanger assembly 1 more compact. By ensuring that the angle α2 between the axis of the second throttling device 13 and the length direction of the plate heat exchanger 11 is α2 < 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, avoiding the excessive tilt angle of the axis of the second throttling device 13 relative to the length direction of the plate heat exchanger 11, which would result in the plate heat exchanger assembly 1 occupying too much space and being difficult to install.

[0064] According to some embodiments of this utility model, refer to Figure 3 The absolute value of the difference between α1 and α2 is less than 60°. When the absolute value of the difference between α1 and α2 is too large, the angle between the axis of the first throttling device 12 and the axis of the second throttling device 13 is too large. This will cause the maximum length of the first throttling device 12 and the second throttling device 13 in the width direction of the plate heat exchanger 11 to be too large, increasing the space occupied by the plate heat exchanger assembly 1 and making the installation of the plate heat exchanger assembly 1 more difficult. By making the absolute value of the difference between α1 and α2 less than 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, making the internal structure of the plate heat exchanger assembly 1 more compact and avoiding the problem of the total length of the plate heat exchanger 11 in the width direction being too large due to the large relative opening angle between the first throttling device 12 and the second throttling device 13, which would lead to installation difficulties.

[0065] According to some embodiments of this utility model, refer to Figure 3The angle between the axis of the first throttling device 12 and the axis of the second throttling device 13 is θ, where 0° < θ < 180°. For example, the value of θ can be 5°, 30°, 45°, 60°, 90°, 120°, 150°, 160°, 170°, etc. By ensuring that the angle θ between the axis of the first throttling device 12 and the axis of the second throttling device 13 satisfies 0° < θ < 180°, the axis of the first throttling device 12 and the axis of the second throttling device 13 are not parallel, making the internal structure of the plate heat exchanger assembly 1 more compact.

[0066] According to some embodiments of this utility model, refer to Figure 3 The angle θ between the first throttling device 12 and the second throttling device 13 is 5° < θ < 90°. For example, the value of θ can be 6°, 10°, 20°, 30°, 40°, 45°, 50°, 60°, 70°, 80°, etc. By ensuring that the angle θ between the axis of the first throttling device 12 and the axis of the second throttling device 13 is 5° < θ, the axes of the first throttling device 12 and the second throttling device 13 are not parallel, making the internal structure of the plate heat exchanger assembly 1 more compact. When the absolute value of the difference between the angle θ between the axes of the first throttling device 12 and the second throttling device 13 is too large, the angle between the axes of the first throttling device 12 and the second throttling device 13 will be too large, resulting in an excessively large maximum length of the first throttling device 12 and the second throttling device 13 in the width direction of the plate heat exchanger 11. This increases the space occupied by the plate heat exchanger assembly 1, making the installation of the plate heat exchanger assembly 1 more difficult. By ensuring that the angle θ between the axis of the first throttling device 12 and the axis of the second throttling device 13 satisfies θ < 90°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, making the internal structure of the plate heat exchanger assembly 1 more compact and avoiding excessive relative opening angle between the first throttling device 12 and the second throttling device 13, which would lead to an excessively large total length of the plate heat exchanger 11 in the width direction and make installation difficult.

[0067] According to some embodiments of this utility model, refer to Figure 3The plate heat exchanger 11 includes multiple heat exchange plates 110 stacked together and a first plate 1101 and a second plate 1102 disposed on both sides of the heat exchange plates 110. The first plate 1101 includes a planar portion 1103, on which a first throttling device 12 and a second throttling device 13 are both disposed. The angle between the projections of the axis of the first throttling device 12 and the axis of the second throttling device 13 onto the plane containing the planar portion 1103 is α, where 0°≤α≤60°. For example, the value of α can be 5°, 10°, 20°, 30°, 40°, 45°, 50°, 59°, etc. The angle α between the projections of the axes of the first throttling device 12 and the second throttling device 13 onto the plane of the planar portion 1103 is too large. This excessive angle between the axes of the first throttling device 12 and the second throttling device 13 results in an excessively large maximum length of the first throttling device 12 and the second throttling device 13 in the width direction of the plate heat exchanger 11, increasing the space occupied by the plate heat exchanger assembly 1 and making its installation more difficult. By ensuring that the angle α between the projections of the axes of the first throttling device 12 and the second throttling device 13 onto the plane of the planar portion 1103 satisfies 0°≤a≤60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced. This makes the internal structure of the plate heat exchanger assembly 1 more compact and avoids the excessively large relative opening angle between the first throttling device 12 and the second throttling device 13, which would otherwise lead to an excessively large total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 and make installation difficult.

[0068] According to some embodiments of this utility model, the plate heat exchanger 11 includes a plurality of heat exchange plates 110 stacked together and a first plate 1101 and a second plate 1102 disposed on both sides of the heat exchange plates 110. The first plate 1101 includes a flat portion 1103, and a first throttling device 12 and a second throttling device 13 are both disposed on the flat portion 1103. The angle between the axis of the first throttling device 12 and the plane containing the flat portion 1103 is b, where -30°≤b≤30°. For example, the value of b can be -30°, -20°, -10°, 0°, 10°, 15°, 20°, 30°, etc. By making the first throttling device 12 and the second throttling device 13 both disposed on the flat portion 1103, and ensuring that the angle b between the axis of the first throttling device 12 and the plane containing the flat portion 1103 satisfies -30°≤b≤30°, the vibration wear of the valve core of the first throttling device 12 can be reduced.

[0069] According to some embodiments of this utility model, the plate heat exchanger 11 includes a plurality of heat exchange plates 110 stacked together and a first plate 1101 and a second plate 1102 disposed on both sides of the heat exchange plates 110. The first plate 1101 includes a flat portion 1103, and a first throttle 12 and a second throttle 13 are both disposed on the flat portion 1103. The angle between the axis of the second throttle 13 and the plane containing the flat portion 1103 is c, where -30°≤c≤30°. For example, the value of c can be -30°, -20°, -10°, 0°, 10°, 15°, 20°, 30°, etc. By ensuring that the angle c between the axis of the second throttle 13 and the plane containing the flat portion 1103 satisfies -30°≤c≤30°, the vibration wear of the valve core of the second throttle 13 can be reduced.

[0070] According to some embodiments of this utility model, the plate heat exchanger 11 is arranged vertically or inclined, and the first throttle 12 includes an electronic expansion valve. The first throttle 12 includes a first coil portion and a first valve core, with the first coil portion disposed above or diagonally above the first valve core. By arranging the plate heat exchanger 11 vertically or inclined and disposing of the first coil portion above or diagonally above the first valve core, vibration wear of the valve core of the first throttle 12 can be reduced.

[0071] According to some embodiments of this utility model, the plate heat exchanger 11 is arranged vertically or inclined, and the second throttle 13 includes an electronic expansion valve. The second throttle 13 includes a second coil portion and a second valve core, with the second coil portion disposed above or diagonally above the second valve core. By arranging the plate heat exchanger 11 vertically or inclined and disposing of the second coil portion above or diagonally above the second valve core, vibration wear of the valve core of the second throttle 13 can be reduced.

[0072] According to some embodiments of the present invention, the plate heat exchanger 11 includes a plurality of heat exchange plates 110 stacked together and a first plate 1101 and a second plate 1102 disposed on both sides of the heat exchange plates 110. The first plate 1101 includes a planar portion 1103, and a first throttle 12 is disposed on the planar portion 1103. The first throttle 12 includes an electronic expansion valve, and the projection of the first coil portion of the first throttle 12 onto the plane of the planar portion 1103 at least covers a portion of the planar portion 1103. By ensuring that the projection of the first coil portion of the first throttle 12 onto the plane of the planar portion 1103 at least covers a portion of the planar portion 1103, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the difficulty of installation due to excessive total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11.

[0073] According to some embodiments of the present invention, the plate heat exchanger 11 includes a plurality of heat exchange plates 110 stacked together and a first plate 1101 and a second plate 1102 disposed on both sides of the heat exchange plates 110. The first plate 1101 includes a planar portion 1103, and a second throttle 13 is disposed on the planar portion 1103. The second throttle 13 includes an electronic expansion valve, and the projection of the second coil portion of the second throttle 13 onto the plane of the planar portion 1103 at least covers a portion of the planar portion 1103. By ensuring that the projection of the second coil portion of the second throttle 13 onto the plane of the planar portion 1103 at least covers a portion of the planar portion 1103, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the difficulty of installation due to excessive total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11.

[0074] According to some embodiments of this utility model, refer to Figure 3 The line connecting the center of the first interface 111 and the center of the second interface 112 is the first connecting line 115, and the line connecting the center of the third interface 113 and the center of the fourth interface 114 is the second connecting line 116. The angle between the axis of the first throttle 12 and the first connecting line 115 is β1, and the angle between the axis of the second throttle 13 and the second connecting line 116 is β2, where 0° < β1 < 180° and / or 0° < β2 < 180°. For example, the value of β1 can be 5°, 10°, 30°, 45°, 60°, 75°, 90°, 120°, 135°, 160°, etc.; the value of β2 can be 5°, 10°, 30°, 45°, 60°, 75°, 90°, 120°, 135°, 160°, etc. By ensuring that the angle β1 between the axis of the first throttling device 12 and the first connecting line 115 satisfies 0° < β1 < 180°, and / or that the angle β2 between the axis of the second throttling device 13 and the second connecting line 116 satisfies 0° < β2 < 180°, the overall structure of the plate heat exchanger assembly 1 can be made more compact, reducing the space occupied by the plate heat exchanger assembly 1.

[0075] According to some embodiments of this utility model, refer to Figure 3 5° < β1 < 60°. For example, the value of β1 can be 6°, 10°, 20°, 30°, 40°, 45°, 50°, 59°, etc. By ensuring that the angle β1 between the axis of the first throttling device 12 and the first connecting line 115 satisfies 5° < β1, the axis of the first throttling device 12 can be tilted relative to the first connecting line 115 to a certain extent, making the internal structure of the plate heat exchanger assembly 1 more compact; by ensuring that the angle β1 between the axis of the first throttling device 12 and the first connecting line 115 satisfies β1 < 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, avoiding the plate heat exchanger assembly 1 occupying too much space and being difficult to install due to the excessive tilt angle of the axis of the first throttling device 12 relative to the first connecting line 115.

[0076] According to some embodiments of this utility model, refer to Figure 3 5° < β2 < 60°. For example, the value of β2 can be 6°, 10°, 20°, 30°, 40°, 45°, 50°, 59°, etc. By ensuring that the included angle β2 between the axis of the second throttling device 13 and the second connecting line 116 satisfies 5° < β2, the axis of the second throttling device 13 can be tilted relative to the second connecting line 116 to a certain extent, making the internal structure of the plate heat exchanger assembly 1 more compact; by ensuring that the included angle β2 between the axis of the second throttling device 13 and the second connecting line 116 satisfies β2 < 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, avoiding the plate heat exchanger assembly 1 occupying too much space and being difficult to install due to the excessive tilt angle of the axis of the second throttling device 13 relative to the second connecting line 116.

[0077] According to some embodiments of this utility model, refer to Figure 3 The absolute value of the difference between β1 and β2 is less than 60°. When the absolute value of the difference between β1 and β2 is too large, the angle between the axis of the first throttling device 12 and the axis of the second throttling device 13 is too large. This will cause the maximum length of the first throttling device 12 and the second throttling device 13 in the width direction of the plate heat exchanger 11 to be too large, increasing the space occupied by the plate heat exchanger assembly 1 and making the installation of the plate heat exchanger assembly 1 more difficult. By making the absolute value of the difference between β1 and β2 less than 60°, the total length of the plate heat exchanger assembly 1 in the width direction of the plate heat exchanger 11 can be appropriately reduced, making the internal structure of the plate heat exchanger assembly 1 more compact and avoiding the problem of the total length of the plate heat exchanger 11 in the width direction being too large due to the large relative opening angle between the first throttling device 12 and the second throttling device 13, which would lead to installation difficulties.

[0078] According to some embodiments of this utility model, refer to Figures 2-4 The plate heat exchanger 11 has a first end 117 and a second end 118 arranged opposite to each other. A first interface 111 and a fourth interface 114 are located at the first end 117 of the plate heat exchanger 11, and a second interface 112 and a third interface 113 are located at the second end 118 of the plate heat exchanger 11. Since the first interface 111 and the fourth interface 114 are connected to other components of the air conditioning system 100, and the second interface 112 and the third interface 113 are connected to components inside the plate heat exchanger assembly 1, the connection between the plate heat exchanger assembly 1 and other structures is more convenient by placing the first interface 111 and the fourth interface 114 at the first end 117 of the plate heat exchanger 11, and the second interface 112 and the third interface 113 at the second end 118 of the plate heat exchanger 11.

[0079] For example, the first interface 111 can be connected to the indoor heat exchanger 2 in the air conditioning system 100, and the fourth interface 114 can be connected to the compressor 4 in the air conditioning system 100.

[0080] According to some embodiments of this utility model, refer to Figures 2-4 The first end 117 and the second end 118 of the plate heat exchanger 11 are located at opposite ends along its length. The line connecting the center of the first interface 111 and the center of the second interface 112 is the first connecting line 115, and the line connecting the center of the third interface 113 and the center of the fourth interface 114 is the second connecting line 116. The first connecting line 115 and the second connecting line 116 are arranged at intervals along the width direction of the plate heat exchanger 11. By arranging the first connecting line 115 and the second connecting line 116 at intervals along the width direction of the plate heat exchanger 11, it is convenient for other components to be connected and installed to the plate heat exchanger 11 through the first interface 111, the second interface 112, the third interface 113, or the fourth interface 114, and interference between multiple components connected to the plate heat exchanger 11 can be avoided.

[0081] According to some embodiments of this utility model, refer to Figures 2-4 The plate heat exchanger assembly 1 also includes a temperature sensor 15, which is used to detect the refrigerant temperature at the third interface 113. By including the temperature sensor 15 in the plate heat exchanger assembly 1, which can be used to detect the refrigerant temperature at the third interface 113, it is easier for relevant personnel to monitor the temperature of the refrigerant entering the plate heat exchanger 11.

[0082] According to some embodiments of this utility model, refer to Figures 2-4 The plate heat exchanger assembly 1 includes a second filter 16, which is connected to the first interface 111. By including the second filter 16 in the plate heat exchanger assembly 1 and connecting it to the first interface 111, the second filter 16 can filter out impurities and contaminants in the refrigerant, reducing the risk of air conditioning system 100 failure due to pipe blockage.

[0083] For example, when the air conditioning system 100 is in cooling mode, the second filter 16 can reduce solid impurities in the refrigerant flowing from the plate heat exchanger 11 to the indoor heat exchanger 2, thereby reducing the risk of air conditioning system 100 failure due to pipe blockage.

[0084] For example, when the air conditioning system 100 is in heating mode, the second filter 16 can reduce solid impurities in the refrigerant flowing from the indoor heat exchanger 2 and into the plate heat exchanger 11, thereby reducing the risk of blockage in the flow path of the plate heat exchanger 11 leading to its failure.

[0085] According to some embodiments of this utility model, refer to Figures 2-4The plate heat exchanger assembly 1 includes a first filter 17 connected to a second inlet / outlet 121. By including the first filter 17 in the plate heat exchanger assembly 1, the first filter 17 can filter out impurities and contaminants in the refrigerant, reducing the risk of air conditioning system 100 failure due to pipe blockage.

[0086] For example, when the air conditioning system 100 is in cooling mode, the first filter 17 can reduce solid impurities in the refrigerant flowing from the outdoor heat exchanger 3 and into the second throttle 13, thereby reducing the risk of the air conditioning system 100 failing due to blockage of the second throttle 13.

[0087] For example, when the air conditioning system 100 is in heating mode, the first filter 17 can reduce solid impurities in the refrigerant flowing out of the second throttle 13 and onto the outdoor heat exchanger 3, thereby reducing the risk of the air conditioning system 100 failing due to pipe blockage.

[0088] According to some embodiments of this utility model, refer to Figures 2-4 The throttle assembly also includes a flow path connection module 14, which has a first flow channel and a second flow channel. The flow path connection module 14 is disposed on the plate heat exchanger 11. One end of the first flow channel is connected to the second interface 112, and the other end of the first flow channel is used to connect to the piping of the air conditioning system. One end of the second flow channel is connected to the first flow channel, and the other end of the second flow channel is connected to the third interface 113. By making the flow path connection module 14 have a first flow channel and a second flow channel, and making one end of the first flow channel connected to the second interface 112, the other end of the first flow channel used to connect to the piping of the air conditioning system, one end of the second flow channel connected to the first flow channel, and the other end of the second flow channel connected to the third interface 113, the first flow path connection module 141 can connect and communicate with the second interface 112, the piping of the air conditioning system, and the third inlet / outlet 131. This allows for the connection of various components and enables the refrigerant to flow within the flow path connection module 14, achieving refrigerant circulation.

[0089] For example, when the air conditioning system 100 is in heating mode, the refrigerant discharged from the compressor 4 flows through the indoor heat exchanger 2. The refrigerant enters the first heat exchange channel of the plate heat exchanger 11 through the first interface 111 from the indoor heat exchanger 2. After exchanging temperature with the refrigerant in the second heat exchange channel in the first heat exchange channel, it leaves the plate heat exchanger 11 through the second interface 112 and enters the first channel of the flow path connection module 14. The refrigerant flowing into the first channel is divided into two paths. One path flows into the second channel and enters the second throttling device 13 through the third inlet / outlet 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth inlet / outlet 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel, and the heat exchange medium in the first heat exchange channel heats the heat exchange medium in the second heat exchange channel. The refrigerant flowing through the second heat exchange channel then leaves the plate heat exchanger 11 through the fourth port 114 and finally enters the compressor 4. Another refrigerant enters the first throttling device 12 through the first inlet and outlet 120, and after being throttled by the first throttling device 12, leaves the first throttling device 12 through the second inlet and outlet 121, and then flows into the outdoor heat exchanger 3, and after flowing through the outdoor heat exchanger 3, flows into the compressor 4.

[0090] For example, when the air conditioning system 100 is in cooling mode, the refrigerant discharged from the compressor 4 flows through the outdoor heat exchanger 3. After flowing out of the outdoor heat exchanger 3, the refrigerant enters the first flow channel and then enters the first throttling device 12 through the second inlet / outlet 121. After being throttled by the first throttling device 12, it exits through the first inlet / outlet 120. The refrigerant after being throttled by the first throttling device 12 is divided into two paths. One path flows into the second flow channel and enters the second throttling device 13 through the third inlet / outlet 131. After being throttled by the second throttling device 13, it exits through the fourth inlet / outlet 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel, thus cooling the refrigerant in the first heat exchange channel. The refrigerant flowing through the second heat exchange channel then exits the plate heat exchanger 11 through the fourth interface 114 and finally enters the compressor 4. Another refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the second interface 112, then leaves the plate heat exchanger 11 through the first interface 111, and finally enters the indoor heat exchanger 2. After passing through the indoor heat exchanger 2, it flows into the compressor 4 through the return port 42 of the compressor 4.

[0091] By including a flow path connection module 14 in the throttling device assembly and installing the flow path connection module 14 on the plate heat exchanger 11, the connection between various interfaces and components is achieved through the flow path connection module 14. Compared with the pipeline connection method used in related technologies, this reduces pipeline complexity and design difficulty. By installing the flow path connection module 14 on the plate heat exchanger 11 and integrating the flow path connection module 14 onto the plate heat exchanger 11, relevant personnel can focus on maintaining and repairing the flow path connection module 14 on the plate heat exchanger assembly 1, making maintenance and repair of the flow path connection module 14 more convenient. According to some embodiments of this utility model, a first throttling cavity is formed in the first flow channel, a first throttling device 12 is disposed in the flow path connection module 14, the first valve core of the first throttling device 12 is disposed in the first throttling cavity, and the first inlet / outlet 120 and the second inlet / outlet 121 are both located in the first flow channel and correspond to the two ends of the first throttling cavity, respectively.

[0092] The second flow channel forms a second throttling cavity. The second throttler 13 is disposed in the flow path connection module 14. The second valve core of the second throttler 13 is disposed in the second throttling cavity. The third inlet / outlet 131 and the fourth inlet / outlet 132 are both located in the second flow channel and correspond to the two ends of the second throttling cavity respectively.

[0093] By placing the first valve core of the first throttle 12 in the first throttle cavity of the flow path connection module 14 and placing the second valve core of the second throttle 13 in the second throttle cavity of the flow path connection module 14, the assembly of the first throttle 12 and the second throttle 13 with the flow path connection module 14 can be made more compact, reducing the space occupied.

[0094] For example, when the air conditioning system 100 is in heating mode, the refrigerant discharged from the compressor 4 flows through the indoor heat exchanger 2. The refrigerant enters the first heat exchange channel of the plate heat exchanger 11 from the indoor heat exchanger 2 through the first interface 111. In the first heat exchange channel, it exchanges temperature with the refrigerant in the second heat exchange channel, and then leaves the plate heat exchanger 11 through the second interface 112 and enters the first channel of the flow path connection module 14. The refrigerant flowing into the first channel is divided into two paths. One path flows into the second channel 140 and enters the second throttling chamber through the third inlet / outlet 131. After being throttled in the second throttling chamber, it leaves the second throttling chamber through the fourth inlet / outlet 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel, and the heat exchange medium in the first heat exchange channel heats the heat exchange medium in the second heat exchange channel. The refrigerant flowing through the second heat exchange channel then leaves the plate heat exchanger 11 through the fourth port 114 and finally enters the compressor 4. Another refrigerant enters the first throttling chamber through the first inlet and outlet 120, and after being throttled in the first throttling chamber, leaves the first throttling chamber through the second inlet and outlet 121, and then flows into the outdoor heat exchanger 3. After flowing through the outdoor heat exchanger 3, it flows into the compressor 4.

[0095] For example, when the air conditioning system 100 is in cooling mode, the refrigerant discharged from the compressor 4 flows through the outdoor heat exchanger 3. After flowing out of the outdoor heat exchanger 3, the refrigerant enters the first flow channel and then enters the first throttling chamber through the second inlet / outlet 121. After being throttled in the first throttling chamber, it exits through the first inlet / outlet 120. The refrigerant after being throttled in the first throttling chamber is divided into two paths. One path flows into the second flow channel 140 and enters the second throttling chamber through the third inlet / outlet 131. After being throttled in the second throttling chamber, it exits through the fourth inlet / outlet 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel, thus cooling the refrigerant in the first heat exchange channel. The refrigerant flowing through the second heat exchange channel then exits the plate heat exchanger 11 through the fourth interface 114 and finally enters the compressor 4. Another refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the second interface 112, then leaves the plate heat exchanger 11 through the first interface 111, and finally enters the indoor heat exchanger 2. After passing through the indoor heat exchanger 2, it flows into the compressor 4 through the return port 42 of the compressor 4.

[0096] According to some embodiments of this utility model, refer to Figures 2-4The plate heat exchanger assembly 1 includes a first filter 17, and the flow path connection module 14 further includes a filter chamber disposed within the first flow channel. The filter chamber is formed at the end of the first throttling cavity away from the second interface 112. The first filter 17 is disposed within the filter chamber, and the end of the filter chamber away from the first throttling cavity is used to connect to the piping of the air conditioning system. In this way, when the refrigerant flows through the filter chamber of the first flow channel, it can be filtered by the first filter 17.

[0097] By placing the first filter 17 inside the filter chamber, compared to the method of using pipeline connection in related technologies, the plate heat exchanger assembly 1 can be made more compact and the difficulty of pipeline design can be reduced; and the first filter 17 can also be integrated into the plate heat exchanger assembly 1, making it more convenient for relevant personnel to maintain and repair the plate heat exchanger assembly 1.

[0098] For example, when the air conditioning system 100 is in heating mode, the refrigerant enters the first heat exchange channel of the plate heat exchanger 11 through the first interface 111. After exchanging temperature with the refrigerant in the second heat exchange channel in the first heat exchange channel, it leaves the plate heat exchanger 11 through the second interface 112 and enters the first channel of the flow path connection module 14. The refrigerant flowing into the first channel is divided into two paths. One path flows into the second channel 140 and enters the second throttling chamber through the third inlet / outlet 131. After being throttled in the second throttling chamber, it leaves the second throttling chamber through the fourth inlet / outlet 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that of the refrigerant in the first heat exchange channel, and the heat exchange medium in the first heat exchange channel heats the heat exchange medium in the second heat exchange channel. The refrigerant flowing through the second heat exchange channel then leaves the plate heat exchanger 11 through the fourth interface 114 and finally enters the compressor 4. Another refrigerant enters the first throttling chamber through the first inlet / outlet 120. After being throttled in the first throttling chamber, it leaves the first throttling chamber through the second inlet / outlet 121. Then it flows through the filter chamber and is filtered by the first filter 17. After filtration, it flows into the outdoor heat exchanger 3 and then into the compressor 4.

[0099] For example, when the air conditioning system 100 is in cooling mode, the refrigerant discharged from the compressor 4 flows through the outdoor heat exchanger 3. After flowing out of the outdoor heat exchanger 3, the refrigerant flows into the first flow channel. The refrigerant flowing into the first flow channel first flows through the filter chamber, is filtered by the first filter 17, and then enters the first throttling chamber through the second inlet and outlet 121. After being throttled by the first throttling chamber, it leaves the first throttling chamber through the first inlet and outlet 120. The refrigerant after being throttled by the first throttling chamber is divided into two paths. One path flows into the second flow channel 140 and enters the second throttling chamber through the third inlet and outlet 131. After being throttled by the second throttling chamber, it leaves the second throttling chamber through the fourth inlet and outlet 132, and then enters the second heat exchange flow channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange flow channel is lower than that of the refrigerant in the first heat exchange flow channel, and the refrigerant in the second heat exchange flow channel cools the refrigerant in the first heat exchange flow channel. The refrigerant flowing through the second heat exchange channel then exits the plate heat exchanger 11 through the fourth port 114 and finally enters the compressor 4. Another stream of refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the second port 112, then exits the plate heat exchanger 11 through the first port 111 and finally enters the indoor heat exchanger 2. After flowing through the indoor heat exchanger 2, it enters the compressor 4 through the return port 42 of the compressor 4.

[0100] According to some embodiments of this utility model, the plate heat exchanger assembly 1 further includes a temperature sensor 15, which is installed in the flow path connection module 14 and used to detect the refrigerant temperature at the third interface 113. By including the temperature sensor 15 in the plate heat exchanger assembly 1 and having the temperature sensor 15 detect the refrigerant temperature at the third interface 113, it is convenient for relevant personnel to monitor the temperature of the refrigerant entering the plate heat exchanger 11. Since the third interface 113 is the inlet for the refrigerant to enter the plate heat exchanger 11, the measured temperature can be more accurate.

[0101] According to some embodiments of this utility model, refer to Figure 2 The plate heat exchanger assembly 1 also includes a flow path connection module 14, which is installed on the plate heat exchanger 11. The flow path connection module 14 is used to connect at least one pair of the following: the second interface 112 with the first inlet / outlet 120, the second interface 112 with the third inlet / outlet 131, and the third interface 113 with the fourth inlet / outlet 132. By including the flow path connection module 14 in the plate heat exchanger assembly 1, the connection between various interfaces and components can be realized through the flow path connection module 14. Compared with the pipeline connection method used in related technologies, the pipeline complexity and design difficulty can be reduced. By installing the flow path connection module 14 on the plate heat exchanger 11 and integrating the flow path connection module 14 onto the plate heat exchanger 11, relevant personnel can concentrate on the plate heat exchanger assembly 1 to maintain and repair the flow path connection module 14, making maintenance and repair of the flow path connection module 14 more convenient.

[0102] For example, the flow path connection module 14 can be used to connect the second interface 112 with the first inlet / outlet 120; for example, the flow path connection module 14 can be used to connect the second interface 112 with the third inlet / outlet 131; for example, the flow path connection module 14 can be used to connect the third interface 113 with the fourth inlet / outlet 132.

[0103] For example, the flow path connection module 14 can be used to connect the second interface 112 with the first inlet / outlet 120, and the second interface 112 with the third inlet / outlet 131; for example, the flow path connection module 14 can be used to connect the second interface 112 with the first inlet / outlet 120, and the third interface 113 with the fourth inlet / outlet 132; for example, the flow path connection module 14 can be used to connect the second interface 112 with the third inlet / outlet 131, and the third interface 113 with the fourth inlet / outlet 132.

[0104] For example, the flow path connection module 14 can be used to connect the second interface 112 with the first inlet / outlet 120, the second interface 112 with the third inlet / outlet 131, and the third interface 113 with the fourth inlet / outlet 132.

[0105] Optionally, the flow path connection module 14 can be block-shaped, and the flow path connection module 14 can form at least one connecting flow channel. When multiple connecting flow channels are formed in the flow path connection module 14, at least some of the multiple connecting flow channels can be isolated from each other. Different interfaces or different components can be connected through the connecting flow channels in the flow path connection module 14.

[0106] According to some embodiments of this utility model, refer to Figure 2 At least a portion of the flow path connection module 14 is located between the first throttle 12 and the second throttle 13. By positioning at least a portion of the flow path connection module 14 between the first throttle 12 and the second throttle 13, the space between the first throttle 12 and the second throttle 13 can be fully utilized, resulting in a compact overall structure for the plate heat exchanger assembly 1.

[0107] According to some embodiments of this utility model, refer to Figure 2 The first inlet / outlet 120, the third inlet / outlet 131, the fourth inlet / outlet 132, the second interface 112, and the third interface 113 are all connected to the flow path connection module 14. By connecting the first inlet / outlet 120, the third inlet / outlet 131, the fourth inlet / outlet 132, the second interface 112, and the third interface 113 to the flow path connection module 14, it is convenient for the flow path connection module 14 to connect at least one pair of the following: the second interface 112 to the first inlet / outlet 120, the second interface 112 to the third inlet / outlet 131, and the third interface 113 to the fourth inlet / outlet 132.

[0108] According to some embodiments of this utility model, refer to Figure 2 The flow path connection module 14 includes a first flow path connection module 141 and a second flow path connection module 142. The second interface 112, the first inlet / outlet 120, and the third inlet / outlet 131 are all connected to the first flow path connection module 141. The first flow path connection module 141 connects the second interface 112 with the first inlet / outlet 120 and with the third inlet / outlet 131. The fourth inlet / outlet 132 and the third interface 113 are all connected to the second flow path connection module 142. The second flow path connection module 142 connects the fourth inlet / outlet 132 with the third interface 113. By including the first flow path connection module 141 and the second flow path connection module 142, the first flow path connection module 141 connects and communicates with the second interface 112, the first inlet / outlet 120, and the third inlet / outlet 131, and the second flow path connection module 142 connects and communicates with the fourth inlet / outlet 132 and the third interface 113. This allows for the connection of various components and enables the refrigerant to flow within the flow path connection module 14, achieving refrigerant circulation.

[0109] For example, when the air conditioning system 100 is in heating mode, the refrigerant discharged from the compressor 4 flows through the indoor heat exchanger 2. The refrigerant from the indoor heat exchanger 2 enters the first heat exchange channel of the plate heat exchanger 11 through the first interface 111. After exchanging temperature with the refrigerant in the second heat exchange channel in the first heat exchange channel, it leaves the plate heat exchanger 11 through the second interface 112 and enters the first flow path connection module 141. The refrigerant is divided into two paths in the first flow path connection module 141. One path flows through the first flow path connection module 141 and then enters the second throttling device 13 through the third inlet / outlet 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth inlet / outlet 132 and enters the second flow path connection module 142. The refrigerant flowing through the second flow path connection module 142 enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that in the first heat exchange channel, and the heat exchange medium in the first heat exchange channel heats the heat exchange medium in the second heat exchange channel. The refrigerant flowing through the second heat exchange channel then leaves the plate heat exchanger 11 through the fourth interface 114 and finally enters the compressor 4; another refrigerant enters the first throttling device 12 through the first flow path connection module 141 and the first inlet and outlet 120, and after being throttled by the first throttling device 12, leaves the first throttling device 12 through the second inlet and outlet 121, and then flows into the outdoor heat exchanger 3, and after flowing through the outdoor heat exchanger 3, flows into the compressor 4.

[0110] For example, when the air conditioning system 100 is in cooling mode, the refrigerant discharged from the compressor 4 flows through the outdoor heat exchanger 3. After flowing out of the outdoor heat exchanger 3, the refrigerant enters the first throttling device 12 through the second inlet / outlet 121. After being throttled by the first throttling device 12, it leaves the first throttling device 12 through the first inlet / outlet 120 and enters the first flow path connection module 141. The refrigerant is divided into two paths in the first flow path connection module 141. One path enters the second throttling device 13 through the first flow path connection module 141 and the third inlet / outlet 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth inlet / outlet 132 and enters the second flow path connection module 142. Then, it enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. The temperature of the refrigerant in the second heat exchange channel is lower than that of the refrigerant in the first heat exchange channel, and the refrigerant in the second heat exchange channel cools the refrigerant in the first heat exchange channel. The refrigerant flowing through the second heat exchange channel then leaves the plate heat exchanger 11 through the fourth interface 114 and finally enters the compressor 4; the other refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the first flow path connection module 141 and the second interface 112, then leaves the plate heat exchanger 11 through the first interface 111 and finally enters the indoor heat exchanger 2, flows through the indoor heat exchanger 2 and enters the compressor 4 through the return port 42 of the compressor 4.

[0111] For example, the first flow path connection module 141 is a three-way flow path module. The first flow path connection module 141 has a first flow path connection port, a second flow path connection port and a third flow path connection port. The first flow path connection port is connected to the first inlet / outlet 120, the second flow path connection port is connected to the third inlet / outlet 131, and the third flow path connection port is connected to the second interface 112.

[0112] For example, a bend is formed on the second flow path connection module 142, and a fourth flow path connection port and a fifth flow path connection port are formed on the second flow path connection module 142. The fourth flow path connection port is connected to the fourth inlet / outlet 132, and the fifth flow path connection port is connected to the third interface 113.

[0113] According to some embodiments of the present invention, at least a portion of the first flow path connection module 141 is located between the first throttling device 12 and the second throttling device 13, and the second flow path connection module 142 is located on one side of the second throttling device 13. By positioning at least a portion of the first flow path connection module 141 between the first throttling device 12 and the second throttling device 13, the space between the first throttling device 12 and the second throttling device 13 can be fully utilized, making the overall structure of the plate heat exchanger assembly 1 compact. By positioning the second flow path connection module 142 on one side of the second throttling device 13, it is easier for the second flow path connection module 142 to connect the second throttling device 13 to the plate heat exchanger 11.

[0114] According to some embodiments of this utility model, refer to Figure 2 The first flow path connection module 141 and the second flow path connection module 142 are connected as a whole. By connecting the first flow path connection module 141 and the second flow path connection module 142 as a whole, the plate heat exchanger assembly 1 can be made compact, and the difficulty of installing and disassembling the flow path connection module 14 can be reduced.

[0115] According to some embodiments of this utility model, refer to Figure 2 The first flow path connection module 141 and the second flow path connection module 142 are integrally formed. By making the first flow path connection module 141 and the second flow path connection module 142 integrally formed, the number of components of the flow path connection module 14 can be reduced, and the installation difficulty of the flow path connection module 14 can be reduced.

[0116] According to some embodiments of this utility model, refer to Figure 2 The plate heat exchanger assembly 1 includes a first filter 17, and the flow path connection module 14 includes a third flow path connection module 143. The third flow path connection module 143 is connected between the second inlet / outlet 121 and the first filter 17 to connect the second inlet / outlet 121 and the first filter 17. By including the third flow path connection module 143 in the flow path connection module 14 and connecting the second inlet / outlet 121 and the first filter 17 with the third flow path connection module 143, compared with the pipeline connection method used in related technologies, the plate heat exchanger assembly 1 can be made more compact, reducing the difficulty of pipeline design; and the first filter 17 can also be integrated into the plate heat exchanger assembly 1, making it more convenient for relevant personnel to maintain and repair the plate heat exchanger assembly 1.

[0117] According to some embodiments of this utility model, refer to Figure 2 The third flow path connection module 143, the second flow path connection module 142, and the first flow path connection module 141 are connected as a whole. By connecting the third flow path connection module 143, the second flow path connection module 142, and the first flow path connection module 141 as a whole, the plate heat exchanger assembly 1 can be made compact, and the difficulty of installing and disassembling the flow path connection module 14 can be reduced.

[0118] According to some embodiments of this utility model, refer to Figure 2 The third flow path connection module 143, the second flow path connection module 142, and the first flow path connection module 141 are integrally formed. By making the third flow path connection module 143, the second flow path connection module 142, and the first flow path connection module 141 integrally formed, the number of components of the flow path connection module 14 can be reduced, and the installation difficulty of the flow path connection module 14 can be reduced.

[0119] According to some embodiments of this utility model, refer to Figure 2The plate heat exchanger assembly 1 also includes a temperature sensor 15, which is installed in the flow path connection module 14 and used to detect the refrigerant temperature at the third interface 113. By including the temperature sensor 15 in the plate heat exchanger assembly 1 and having the temperature sensor 15 detect the refrigerant temperature at the third interface 113, it is convenient for relevant personnel to monitor the temperature of the refrigerant entering the plate heat exchanger 11. Since the third interface 113 is the inlet for the refrigerant to enter the plate heat exchanger 11, this makes the measured temperature more accurate.

[0120] For example, temperature sensor 15 is an embedded temperature-sensing sleeve.

[0121] According to some embodiments of this utility model, refer to Figure 2 Both the first throttling device 12 and the second throttling device 13 are installed and fixed to the plate heat exchanger 11 through the flow path connection module 14. By installing and fixing both the first throttling device 12 and the second throttling device 13 to the plate heat exchanger 11 through the flow path connection module 14, the connection between the first throttling device 12 and the plate heat exchanger 11, and between the second throttling device 13 and the plate heat exchanger 11, can be made more stable. At the same time, it is also convenient for the first throttling device 12 to be connected to the flow path connection module 14, and for the second throttling device 13 to be connected to the flow path connection module 14.

[0122] According to some embodiments of this utility model, refer to Figure 2 At least one of the first throttle valve 12 and the second throttle valve 13 is detachably connected to the flow path connection module 14. By making at least one of the first throttle valve 12 and the second throttle valve 13 detachably connected to the flow path connection module 14, maintenance or repair of the plate heat exchanger assembly 1 becomes more convenient. For example, the first throttle valve 12 is detachably connected to the flow path connection module 14; another example is that the second throttle valve 13 is detachably connected to the flow path connection module 14; yet another example is that both the first throttle valve 12 and the flow path connection module 14 are detachably connected, and the second throttle valve 13 is also detachably connected to the flow path connection module 14.

[0123] According to some embodiments of this utility model, refer to Figure 2 A first fastener 122 is connected between the first throttle 12 and the flow path connection module 14. By connecting the first throttle 12 and the flow path connection module 14 with the first fastener 122, the connection between the first throttle 12 and the flow path connection module 14 can be made more stable, and it is easier for relevant personnel to maintain or repair the first throttle 12.

[0124] According to some embodiments of this utility model, refer to Figure 2A second fastener 133 is connected between the second throttle 13 and the flow path connection module 14. By connecting the second throttle 13 and the flow path connection module 14 with the second fastener 133, the connection between the second throttle 13 and the flow path connection module 14 can be made more stable, and it is easier for relevant personnel to maintain or repair the second throttle 13.

[0125] According to some embodiments of this utility model, refer to Figure 2 At least one of the first throttle valve 12 and the second throttle valve 13 is spaced apart from the plate heat exchanger 11. When the air conditioning system 100 is operating, the first throttle valve 12 and the second throttle valve 13 will vibrate. By spaced apart at least one of the first throttle valve 12 and the second throttle valve 13 from the plate heat exchanger 11, the collision between the first throttle valve 12 or the second throttle valve 13 and the plate heat exchanger 11 can be reduced.

[0126] Reference Figure 1 An air conditioning system 100 according to a second aspect embodiment of the present invention includes: an indoor heat exchanger 2, an outdoor heat exchanger 3, a compressor 4, and a plate heat exchanger assembly 1 according to a first aspect embodiment of the present invention. Both the indoor heat exchanger 2 and the outdoor heat exchanger 3 are connected to the compressor 4. A first interface 111 of the plate heat exchanger assembly 1 according to the first aspect embodiment of the present invention is connected to the indoor heat exchanger 2, and a fourth interface 114 is connected to the compressor 4.

[0127] The air conditioning system 100 according to an embodiment of the present invention includes a plate heat exchanger assembly 1 according to a first aspect of the present invention. The plate heat exchanger assembly 1 integrates the plate heat exchanger 11, the first throttling device 12, and the second throttling device 13 by mounting both the first throttling device 12 and the second throttling device 13 on the plate heat exchanger 11. This reduces the length of the connecting pipes between the first throttling device 12 and the second throttling device 13 and the plate heat exchanger 11, which is beneficial for reducing the space occupied by the connecting pipes, reducing the number of pipe welding processes, reducing the risk of weld leakage, reducing the risk of pipe vibration stress fracture, and improving pipe reliability. Furthermore, it makes the structure of the plate heat exchanger assembly 1 compact and reduces the space occupied by the plate heat exchanger assembly 1.

[0128] According to some embodiments of this utility model, refer to Figure 1The air conditioning system 100 also includes a four-way valve 5, which has a first valve port 51, a second valve port 52, a third valve port 53, and a fourth valve port 54. The first valve port 51 is connected to the exhaust port 41 of the compressor 4, the second valve port 52 is connected to the indoor heat exchanger 2, the third valve port 53 is connected to both the return port 42 and the fourth interface 114 of the compressor 4, and the fourth valve port 54 is connected to the outdoor heat exchanger 3. By including the four-way valve 5 in the air conditioning system 100, the air conditioning system 100 can be easily switched between cooling and heating modes, and the connection between the different valve ports can be adjusted according to the cooling or heating needs.

[0129] For example, refer to Figure 1 , Figure 1 The solid arrows in the diagram indicate the direction of refrigerant flow when the air conditioning system 100 is in cooling mode. At this time, the first valve port 51 of the four-way valve 5 can be connected to the fourth valve port 54, and the second valve port 52 and the third valve port 53 can be connected. The first valve port 51 and the second valve port 52 are not connected to each other. The refrigerant discharged from the exhaust port 41 of the compressor 4 enters the four-way valve 5 through the first valve port 51, leaves the four-way valve 5 through the fourth valve port 54, and then flows into the outdoor heat exchanger 3 for heat exchange. The refrigerant flowing through the outdoor heat exchanger 3 flows into the first throttling device 12 for throttling. After being throttled by the first throttling device 12, the refrigerant is divided into two paths. One path of refrigerant flows through the second throttling device 13 and the second heat exchange channel of the plate heat exchanger 11, and then flows into the compressor 4 through the return port 42 of the compressor 4. The other path of refrigerant flows through the first heat exchange channel of the plate heat exchanger 11 and the indoor heat exchanger 2, enters the four-way valve 5 through the second valve port 52, leaves the four-way valve 5 through the third valve port 53, and then flows into the compressor 4 through the return port 42 of the compressor 4.

[0130] For example, refer to Figure 1 , Figure 1 The dashed arrows indicate the refrigerant flow direction when the air conditioning system 100 is in heating mode. At this time, the first valve port 51 of the four-way valve 5 is connected to the second valve port 52, and the third valve port 53 is connected to the fourth valve port 54. The first valve port 51 and the third valve port 53 are not connected to each other. The refrigerant discharged from the exhaust port 41 of the compressor 4 enters the four-way valve 5 through the first valve port 51, then leaves the four-way valve 5 through the second valve port 52, flows into the indoor heat exchanger 2 for heat exchange, and then flows into the first heat exchange channel of the plate heat exchanger 11. The refrigerant flowing out of the first heat exchange channel is divided into two paths. One path flows through the second throttling device 13 and the second heat exchange channel of the plate heat exchanger 11, and then flows into the compressor 4 through the return port 42 of the compressor 4. The other path flows through the first throttling device 12 and the outdoor heat exchanger 3, then enters the four-way valve 5 through the fourth valve port 54, then leaves the four-way valve 5 through the third valve port 53, and flows into the compressor 4 through the return port 42 of the compressor 4.

[0131] The following reference Figures 1-4 The present invention describes a plate heat exchanger assembly 1 according to some specific embodiments of the present invention.

[0132] In this embodiment, the plate heat exchanger assembly 1 includes: a plate heat exchanger 11, a first throttle 12, and a second throttle 13.

[0133] The plate heat exchanger 11 has a first heat exchange channel and a second heat exchange channel that are isolated from each other and exchange heat with each other. The plate heat exchanger 11 is provided with a first interface 111, a second interface 112, a third interface 113 and a fourth interface 114. One of the first interface 111 and the second interface 112 serves as the inlet of the first heat exchange channel and the other serves as the outlet of the first heat exchange channel. One of the third interface 113 and the fourth interface 114 serves as the inlet of the second heat exchange channel and the other serves as the outlet of the second heat exchange channel.

[0134] The first throttle 12 is disposed on the plate heat exchanger 11 and includes a first inlet 120 and a second inlet 121. One of the first inlet 120 and the second inlet 121 serves as the inlet of the first throttle 12 and the other serves as the outlet of the first throttle 12. The first inlet 120 is connected to the second interface 112.

[0135] The second throttle 13 is disposed on the plate heat exchanger 11 and includes a third inlet / outlet 131 and a fourth inlet / outlet 132. One of the third inlet / outlet 131 and the fourth inlet / outlet 132 serves as the inlet of the second throttle 13 and the other serves as the outlet of the second throttle 13. The third inlet / outlet 131 is connected to the second interface 112, and the fourth inlet / outlet 132 is connected to the third interface 113.

[0136] The first throttling device 12 and the second throttling device 13 are arranged along the width direction of the plate heat exchanger 11. The angle between the axis of the first throttling device 12 and the length direction of the plate heat exchanger 11 is α1, and the angle between the axis of the second throttling device 13 and the length direction of the plate heat exchanger 11 is α2. α1 and α2 satisfy 5° < α1 < 60°, 5° < α2 < 60°, and the absolute value of the difference between α1 and α2 is less than 60°. The angle between the axis of the first throttling device 12 and the axis of the second throttling device 13 is θ, and θ satisfies 5° < θ < 90°. The line connecting the center of the first interface 111 and the center of the second interface 112 is the first connecting line 115. The line connecting the center of the third interface 113 and the center of the fourth interface 114 is the second connecting line 116. The angle between the axis of the first throttle 12 and the first connecting line 115 is β1. The angle between the axis of the second throttle 13 and the second connecting line 116 is β2. β1 and β2 satisfy 5° < β1 < 60°, 5° < β2 < 60°, and the absolute value of the difference between β1 and β2 is less than 60°.

[0137] The plate heat exchanger 11 has a first end 117 and a second end 118 disposed opposite to each other. A first interface 111 and a fourth interface 114 are located at the first end 117 of the plate heat exchanger 11, and a second interface 112 and a third interface 113 are located at the second end 118 of the plate heat exchanger 11. The first end 117 and the second end 118 of the plate heat exchanger 11 are located at opposite ends along the length of the plate heat exchanger 11. The line connecting the center of the first interface 111 and the center of the second interface 112 is the first connecting line 115, and the line connecting the center of the third interface 113 and the center of the fourth interface 114 is the second connecting line 116. The first connecting line 115 and the second connecting line 116 are arranged at intervals along the width direction of the plate heat exchanger 11.

[0138] The plate heat exchanger assembly 1 includes a first filter 17 connected to a first interface 111; the plate heat exchanger assembly 1 also includes a second filter 16 connected to a second inlet / outlet 121.

[0139] The plate heat exchanger assembly 1 also includes a flow path connection module 14, which is installed on the plate heat exchanger 11. The flow path connection module 14 connects the second interface 112 with the first inlet / outlet 120, the second interface 112 with the third inlet / outlet 131, and the third interface 113 with the fourth inlet / outlet 132. At least a portion of the flow path connection module 14 is located between the first throttling device 12 and the second throttling device 13. The first inlet / outlet 120, the third inlet / outlet 131, the fourth inlet / outlet 132, the second interface 112, and the third interface 113 are all connected to the flow path connection module 14. The flow path connection module 14 includes a first flow path connection module 141, a second flow path connection module 142, and a third flow path connection module 143. The second interface 112, the first inlet / outlet 120, and the third inlet / outlet 131 are all connected to the first flow path connection module 141, which connects the second interface 112 to the first inlet / outlet 120 and to the third inlet / outlet 131. The fourth inlet / outlet 132 and the third interface 113 are both connected to the second flow path connection module 142, which connects the fourth inlet / outlet 132 to the third interface 113. The third flow path connection module 143 is connected between the second inlet / outlet 121 and the first filter 17 to connect the second inlet / outlet 121 to the first filter 17. The third flow path connection module 143, the second flow path connection module 142, and the first flow path connection module 141 are integrally formed.

[0140] The plate heat exchanger assembly 1 also includes a temperature sensor 15, which is installed in the flow path connection module 14 and is used to detect the refrigerant temperature at the third interface 113.

[0141] Both the first throttling device 12 and the second throttling device 13 are mounted and fixed to the plate heat exchanger 11 via the flow path connection module 14. Both the first throttling device 12 and the second throttling device 13 are detachably connected to the flow path connection module 14. A first fastener 122 connects the first throttling device 12 to the flow path connection module 14, and a second fastener 133 connects the second throttling device 13 to the flow path connection module 14. Both the first throttling device 12 and the second throttling device 13 are spaced apart from the plate heat exchanger 11.

[0142] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0143] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0144] In the description of this utility model, "multiple" means two or more.

[0145] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0146] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0147] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0148] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A plate heat exchanger assembly, characterized in that include: A plate heat exchanger has a first heat exchange channel and a second heat exchange channel that are separated from each other and exchange heat with each other. The plate heat exchanger is provided with a first interface, a second interface, a third interface and a fourth interface. One of the first interface and the second interface serves as the inlet of the first heat exchange channel and the other serves as the outlet of the first heat exchange channel. One of the third interface and the fourth interface serves as the inlet of the second heat exchange channel and the other serves as the outlet of the second heat exchange channel. A throttling device assembly is disposed in the plate heat exchanger and includes a first throttling device and a second throttling device. The throttling device assembly includes a first inlet and outlet, a second inlet and outlet, a third inlet and outlet, and a fourth inlet and outlet. One of the first inlet and outlet and the second inlet and outlet serves as the inlet of the first throttling device and the other serves as the outlet of the first throttling device. The first inlet and outlet is connected to the second interface. One of the third inlet and outlet and the fourth inlet and outlet serves as the inlet of the second throttling device and the other serves as the outlet of the second throttling device. The fourth inlet and outlet is connected to the third interface.

2. The plate heat exchanger package according to claim 1, characterized in that The first throttle and the second throttle are arranged along the width direction of the plate heat exchanger; and / or, the third inlet and outlet are connected to the second interface.

3. The plate heat exchanger package according to claim 2, characterized in that The angle between the axis of the first throttling device and the length direction of the plate heat exchanger is α1, and the angle between the axis of the second throttling device and the length direction of the plate heat exchanger is α2, where 0° < α1 < 180° and / or 0° < α2 < 180°.

4. The plate heat exchanger package according to claim 3, characterized in that 5° < α1 < 60°; and / or, 5° < α2 < 60°.

5. The plate heat exchanger package according to claim 3, characterized in that The absolute value of the difference between α1 and α2 is less than 60°.

6. The plate heat exchanger package of claim 1, wherein, The angle between the axis of the first throttle and the axis of the second throttle is θ, where 0° < θ < 180°.

7. A plate heat exchanger package according to claim 6, characterized in that 5° < θ < 90°.

8. The plate heat exchanger assembly according to claim 1, characterized in that The plate heat exchanger includes multiple heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and both the first throttling device and the second throttling device are disposed on the planar portion. The angle between the projections of the axes of the first throttling device and the second throttling device onto the plane where the planar portion is located is α, where 0°≤α≤60°.

9. The plate heat exchanger package of claim 1, wherein, The plate heat exchanger includes multiple heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and both the first throttling device and the second throttling device are disposed on the planar portion. The angle between the axis of the first throttling device and the plane containing the planar portion is b, -30°≤b≤30°; and / or, the angle between the axis of the second throttling device and the plane containing the planar portion is c, -30°≤c≤30°.

10. The plate heat exchanger assembly according to claim 1, characterized in that The plate heat exchanger is arranged vertically or at an angle. The first throttle includes an electronic expansion valve, and the first throttle includes a first coil and a first valve core. The first coil is located above or diagonally above the first valve core; and / or The plate heat exchanger is installed vertically or at an angle. The second throttle includes an electronic expansion valve and a second coil section and a second valve core. The second coil section is located above or diagonally above the second valve core.

11. The plate heat exchanger package of claim 1, wherein The plate heat exchanger includes a plurality of heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and a first throttle is disposed on the planar portion. The first throttle includes an electronic expansion valve, and the projection of the first coil portion of the first throttle onto the plane containing the planar portion at least partially covers the planar portion; and / or The plate heat exchanger includes a plurality of heat exchange plates stacked together and a first plate and a second plate disposed on both sides of the heat exchange plates. The first plate includes a planar portion, and a second throttle is disposed on the planar portion. The second throttle includes an electronic expansion valve, and the projection of the second coil portion of the second throttle onto the plane of the planar portion at least partially covers the planar portion.

12. The plate heat exchanger package of claim 1, wherein The line connecting the center of the first interface and the center of the second interface is the first line, the line connecting the center of the third interface and the center of the fourth interface is the second line, the angle between the axis of the first throttle and the first line is β1, the angle between the axis of the second throttle and the second line is β2, 0° < β1 < 180° and / or 0° < β2 < 180°.

13. A plate heat exchanger package according to claim 12, characterized in that 5° < β1 < 60°; and / or, 5° < β2 < 60°.

14. The plate heat exchanger assembly according to claim 12, characterized in that The absolute value of the difference between β1 and β2 is less than 60°.

15. The plate heat exchanger assembly of claim 1, wherein, The plate heat exchanger has a first end and a second end that are arranged opposite to each other. The first interface and the fourth interface are located at the first end of the plate heat exchanger, and the second interface and the third interface are located at the second end of the plate heat exchanger.

16. A plate heat exchanger package according to claim 15, characterized in that The first end and the second end of the plate heat exchanger are located at opposite ends along the length of the plate heat exchanger. The line connecting the center of the first interface and the center of the second interface is the first connecting line, and the line connecting the center of the third interface and the center of the fourth interface is the second connecting line. The first connecting line and the second connecting line are arranged at intervals along the width direction of the plate heat exchanger.

17. The plate heat exchanger package according to any of the claims 1 - 16, characterized by It also includes a temperature sensor for detecting the refrigerant temperature at the third interface.

18. The plate heat exchanger package according to any of the claims 1 - 16, characterized by The plate heat exchanger assembly includes a second filter connected to the first interface; and / or, the plate heat exchanger assembly includes a first filter connected to the second inlet and outlet.

19. The plate heat exchanger package according to any of the claims 1 - 16, characterized by The throttle assembly further includes a flow path connection module, which has a first flow channel and a second flow channel. The flow path connection module is disposed on the plate heat exchanger. One end of the first flow channel is connected to the second interface, and the other end of the first flow channel is used to connect to the piping of the air conditioning system. One end of the second flow channel is connected to the first flow channel, and the other end of the second flow channel is connected to the third interface.

20. The plate heat exchanger assembly according to claim 19, characterized in that A first throttling cavity is formed in the first flow channel. The first throttler is disposed in the flow path connection module. The first valve core of the first throttler is disposed in the first throttling cavity. The first inlet and outlet and the second inlet and outlet are both located in the first flow channel and correspond to the two ends of the first throttling cavity, respectively. A second throttling cavity is formed in the second flow channel. The second throttler is disposed in the flow path connection module. The second valve core of the second throttler is disposed in the second throttling cavity. The third inlet and outlet and the fourth inlet and outlet are both located in the second flow channel and correspond to the two ends of the second throttling cavity, respectively.

21. A plate heat exchanger package according to claim 20, characterized in that The plate heat exchanger assembly includes a first filter, and the flow path connection module further includes a filter cavity disposed in the first flow channel. The filter cavity is formed at the end of the first throttling cavity away from the second interface. The first filter is disposed in the filter cavity, and the end of the filter cavity away from the first throttling cavity is used to connect with the piping of the air conditioning system.

22. The plate heat exchanger assembly according to claim 19, characterized in that It also includes a temperature sensor, which is installed in the flow path connection module and is used to detect the refrigerant temperature at the third interface.

23. An air conditioning system comprising: include: Indoor heat exchanger; Outdoor heat exchanger; The compressor, the indoor heat exchanger, and the outdoor heat exchanger are all connected to the compressor; The plate heat exchanger assembly according to any one of claims 1-22, wherein the first interface is connected to the indoor heat exchanger and the fourth interface is connected to the compressor.

24. The air conditioning system of claim 23, wherein, It also includes a four-way valve, which has a first valve port, a second valve port, a third valve port and a fourth valve port. The first valve port is connected to the exhaust port of the compressor, the second valve port is connected to the indoor heat exchanger, the third valve port is connected to both the return port of the compressor and the fourth interface, and the fourth valve port is connected to the outdoor heat exchanger.

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