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 first throttler, and the first heat exchange flow channel and second heat exchange flow channel that mutually cut off and mutually heat exchange are formed in plate heat exchanger, and plate heat exchanger is equipped with first interface, second interface, third interface and fourth interface. First throttler is installed on plate heat exchanger and includes valve body and valve core, and valve body is equipped with first connecting port, second connecting port and throttling channel, and valve core is movably arranged in throttling channel, and first connecting port is connected through first connecting pipeline between second interface, and the extension direction of first connecting pipeline at least part constitutes connecting section, and connecting section is directly connected with first connecting port, and the included angle between the axis of connecting section and the axis of first throttler is a, 60 is less than a and is less than 120. According to the plate heat exchanger subassembly of the utility model embodiment, can reduce the noise.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning, 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 expansion joints and plate heat exchangers, the expansion joint is typically connected to the plate heat exchanger via piping to achieve refrigerant circulation. However, during the operation of the air conditioning system, the refrigerant flowing from the plate heat exchanger into the expansion joint through the piping can generate significant noise. Therefore, improvements are needed. Utility Model Content

[0003] This utility model aims to at least solve 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, wherein a first throttling device is connected to the plate heat exchanger via a first connecting pipe, and at least a portion of the first connecting pipe in its extension direction constitutes a connecting section. By ensuring that the angle α between the axis of the connecting section and the axis of the first throttling device satisfies 60° < α < 120°, refrigerant flows into the first throttling device through the connecting section. Since the flow direction of the refrigerant forms an angle with the axis of the first throttling device, the velocity component of the refrigerant in the axial direction of the first throttling device is relatively small. This reduces the impact force of the refrigerant on the valve core along the axial direction of the first throttling device and on the valve orifice of the first throttling device, thereby reducing the vibration noise caused by the refrigerant impact on the first throttling device and thus reducing the noise generated during the operation of the first throttling device.

[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 first throttling device mounted on the plate heat exchanger and including a valve. The valve body and valve core are provided. The valve body is provided with a first connection port, a second connection port, and a throttling channel connecting the first connection port and the second connection port. The valve core is movably disposed in the throttling channel. One of the first connection port and the second connection port serves as the inlet of the first throttling device and the other serves as the outlet of the first throttling device. The first connection port and the second connection port are connected by a first connecting pipe. At least a portion of the first connecting pipe in the extension direction constitutes a connecting section. The connecting section is directly connected to the first connection port. The angle between the axis of the connecting section and the axis of the first throttling device is α, where 60° < α < 120°.

[0006] According to the plate heat exchanger assembly of this utility model embodiment, the first throttling device and the plate heat exchanger are connected by a first connecting pipe, and at least a portion of the extension direction of the first connecting pipe constitutes a connecting section. By ensuring that the angle α between the axis of the connecting section and the axis of the first throttling device satisfies 60° < α < 120°, the refrigerant flows into the first throttling device through the connecting section. The flow direction of the refrigerant flowing into the first throttling device through the connecting section forms an angle with the axis of the first throttling device. The velocity component of the refrigerant in the axial direction of the first throttling device is small, which can reduce the impact force of the refrigerant on the valve core in the axial direction of the first throttling device and on the valve port of the first throttling device. This can reduce the vibration noise caused by the refrigerant impact on the first throttling device, thereby reducing the noise generated when the first throttling device is working.

[0007] According to some embodiments of this utility model, 85° < a < 95°.

[0008] According to some embodiments of the present invention, the axis of the connecting segment extends along a straight line.

[0009] According to some embodiments of the present invention, the outer surface of the plate heat exchanger includes a mounting surface, the first interface, the second interface, the third interface and the fourth interface are all formed on the mounting surface, and the angle between the axis of the connecting section and the mounting surface is b, where 80° < b < 100°.

[0010] According to some embodiments of the present invention, the first connection port is formed on the outer peripheral side of the first throttling device; and / or, the first connection port faces the plate heat exchanger.

[0011] According to some embodiments of the present invention, the second connection port is formed on one axial side of the first throttle, and the second connection port is connected to a second connection pipe, at least a portion of which extends along the axial direction of the first throttle.

[0012] According to some embodiments of the present invention, the first throttle is an electronic expansion valve, the valve core is needle-shaped, and the extending direction of the valve core is consistent with the axial direction of the valve body.

[0013] 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 along the length direction of the plate heat exchanger, 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.

[0014] According to some embodiments of the present invention, the heat exchanger assembly further includes a second throttling device, which is installed on the plate heat exchanger and includes a third connection port and a fourth connection port. One of the third connection port and the fourth connection port serves as the inlet of the second throttling device and the other serves as the outlet of the second throttling device. The third connection port is connected to the second interface through the first throttling device, and the fourth connection port is connected to the third interface.

[0015] According to some embodiments of the present invention, a fifth connection port is formed on the first throttle, and the fifth connection port is connected to the third connection port through a third connection pipe. The fifth connection port is formed on the outer periphery of the first throttle and is spaced apart from the first connection port.

[0016] According to some embodiments of the present invention, the third connection port is formed on the outer peripheral side of the second throttle, the fourth connection port is formed on the axial side of the second throttle, and the fourth connection port is connected to the third interface through a third connection pipe.

[0017] 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.

[0018] 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 < 60°.

[0019] According to some embodiments of this utility model, 0° < θ < 45°.

[0020] According to some embodiments of the present invention, the outer surface of the plate heat exchanger includes a mounting surface, and the first interface, the second interface, the third interface, and the fourth interface are all formed on the mounting surface. The angle between the axis of the first throttling device and the mounting surface is c, where -15° < c < 15°; and / or

[0021] The outer surface of the plate heat exchanger includes a mounting surface. The first interface, the second interface, the third interface, and the fourth interface are all formed on the mounting surface. The angle between the axis of the second throttling device and the mounting surface is d, where -15° < d < 15°.

[0022] 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; a plate heat exchanger assembly according to a first aspect of the present invention has a first interface connected to the indoor heat exchanger and a fourth interface connected to the compressor; wherein the air conditioning system has a heating mode, and in the heating mode, the first throttling device functions as a throttling device, and refrigerant flows from the first interface into the first heat exchange channel of the plate heat exchanger, and then flows into the first throttling device via the second interface and the first connecting pipe.

[0023] According to the air conditioning system of the present invention, a plate heat exchanger assembly according to the first aspect of the present invention is included. In heating mode, refrigerant flows into a first throttler via the second interface and the first connecting pipe. The flow direction of the refrigerant into the first throttler forms an angle with the axis of the first throttler. The velocity component of the refrigerant in the axial direction of the first throttler is relatively small, which can reduce the impact force of the refrigerant on the valve core along the axial direction of the first throttler and on the valve port of the first throttler. This can reduce the vibration noise caused by the refrigerant impact on the first throttler, thereby reducing the noise generated when the first throttler is working and reducing the noise of the plate heat exchanger assembly.

[0024] According to some embodiments of the present invention, the air conditioning system has a cooling mode, in which the first throttle is fully open; the air conditioning system further includes a third throttle, which is connected between the first interface and the indoor heat exchanger.

[0025] 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.

[0026] 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

[0027] 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:

[0028] Figure 1 This is a schematic diagram illustrating the working principle of an air conditioning system according to some embodiments of the present invention;

[0029] Figure 2 This is a perspective view of a plate heat exchanger assembly according to some embodiments of the present utility model;

[0030] Figure 3 yes Figure 2 A top view of the plate heat exchanger assembly in the image;

[0031] Figure 4 yes Figure 3 Cross-sectional view along the CC line;

[0032] Figure 5 This is a schematic diagram illustrating the working principle of a plate heat exchanger assembly according to some embodiments of the present invention.

[0033] Figure Labels

[0034] 100. Air conditioning system;

[0035] 1. Plate heat exchanger assembly;

[0036] 11. Plate heat exchanger; 111. First interface; 112. Second interface; 113. Third interface; 114. Fourth interface; 117. First end; 118. Second end; 119. Mounting surface;

[0037] 12. First throttle; 121. First connection port; 122. Second connection port; 123. Fifth connection port; 13. Second throttle; 131. Third connection port; 132. Fourth connection port; 14. First connecting pipe; 141. Connecting section; 15. Second connecting pipe; 16. Third connecting pipe; 17. First filter; 18. Second filter;

[0038] 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; 6. Third throttle. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the 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.

[0040] The following is for reference. Figures 1-5 This invention describes a plate heat exchanger assembly according to an embodiment of the present invention.

[0041] The plate heat exchanger assembly 1 according to an embodiment of the present utility model includes: a plate heat exchanger 11, a first throttle 12, and a second throttle 13.

[0042] 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.

[0043] The first throttle valve 12 is mounted on the plate heat exchanger 11 and includes a valve body and a valve core. The valve body has a first connection port 121, a second connection port 122, and a throttling channel connecting the first connection port 121 and the second connection port 122. The valve core is movably disposed in the throttling channel. One of the first connection port 121 and the second connection port 122 serves as the inlet of the first throttle valve 12, and the other serves as the outlet of the first throttle valve 12. The first connection port 121 and the second connection port 112 are connected by a first connecting pipe 14. At least a portion of the first connecting pipe 14 in its extending direction constitutes a connecting section 141, which is directly connected to the first connection port 121. The angle between the axis of the connecting section 141 and the axis of the first throttle valve 12 is α, where 60° < α < 120°. The axis of the first throttle valve 12 refers to the axis of the valve core of the first throttle valve 12.

[0044] In related technologies, refrigerant enters the first throttle 12 along its axial direction. When flowing through the valve core, the refrigerant directly impacts the valve core from the axial direction of the first throttle 12, causing the valve core to move along the throttling channel and repeatedly push the valve core up, generating collision noise. By ensuring that the angle α between the axis of the connecting section 141 and the axis of the first throttle 12 satisfies 60° < α < 120°, the flow velocity of the refrigerant when flowing through the connecting section 141 forms an angle with the axis of the first throttle 12. This reduces the flow velocity of the refrigerant along the axial direction of the first throttle 12, thus reducing the impact force of the refrigerant on the valve core along the axial direction of the first throttle 12, and reducing the noise caused by the valve core being impacted or pushed up by the refrigerant.

[0045] For example, refer to Figure 4 The axis of the connecting section 141 is L3, the axis of the first throttle 12 is L1, and the value of a can be 61°, 70°, 75°, 80°, 85°, 90°, 100°, 110°, 115°, etc.

[0046] For example, refer to Figure 5 , Figure 5 The dashed arrows indicate the refrigerant flow direction when the air conditioning system 100 is in heating mode. After being discharged from the compressor 4's exhaust port 41, the refrigerant flows through the indoor heat exchanger 2. The refrigerant flowing from the indoor heat exchanger 2 enters the first heat exchange channel of the plate heat exchanger 11 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. It flows through the connecting section 141 of the first connecting pipe 14 and enters the first throttling device 12 through the second connection port 122. At this time, because there is an angle between the refrigerant flow direction and the axial direction of the first throttling device 12, the velocity component of the refrigerant in the axial direction of the first throttling device 12 is smaller, which reduces the impact force of the refrigerant on the valve core along the axial direction of the first throttling device 12, and reduces the noise generated by the refrigerant lifting the valve core. The refrigerant flowing out of the plate heat exchanger 11 from the second port 112 is divided into two paths. One path leaves the first throttle 12 through the first connection port 121 and finally enters the outdoor heat exchanger 3. The other path enters the second heat exchange channel of the plate heat exchanger 11 through the third port 113, and finally leaves the plate heat exchanger 11 through the fourth port 114, and finally flows into the compressor 4 through the return port 42 of the compressor 4.

[0047] For example, refer to Figure 5 , Figure 5The solid arrows in the diagram indicate the direction of refrigerant flow when the air conditioning system 100 is in cooling mode. After the refrigerant is discharged from the exhaust port 41 of the compressor 4, it flows through the outdoor heat exchanger 3. The refrigerant flowing out of the outdoor heat exchanger 3 enters the first throttle 12 through the first connection port 121. At this time, the refrigerant is divided into two paths. One path leaves the first throttle 12 through the second connection port 122 and enters the first heat exchange channel of the plate heat exchanger 11 through the second interface 112. 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 first interface 111 and finally flows into the indoor heat exchanger 2. The other path enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113 and finally leaves the plate heat exchanger 11 through the fourth interface 114, and finally flows into the compressor 4 through the return port 42 of the compressor 4.

[0048] According to the plate heat exchanger assembly 1 of this utility model embodiment, the first throttle 12 and the plate heat exchanger 11 are connected by a first connecting pipe 14, and at least a portion of the extension direction of the first connecting pipe 14 constitutes a connecting section 141. By ensuring that the angle α between the axis of the connecting section 141 and the axis of the first throttle 12 satisfies 60° < α < 120°, the refrigerant flows into the first throttle 12 through the connecting section 141. The flow direction of the refrigerant flowing into the first throttle 12 through the connecting section 141 forms an angle with the axis of the first throttle 12. The velocity component of the refrigerant in the axial direction of the first throttle 12 is relatively small, which can reduce the impact force of the refrigerant on the valve core along the axial direction of the first throttle 12 and on the valve port of the first throttle 12. This can reduce the vibration noise caused by the refrigerant impact on the first throttle 12, thereby reducing the noise generated when the first throttle 12 is working.

[0049] According to some embodiments of this utility model, refer to Figures 2-4 85° < a < 95°. For example, the value of a can be 86°, 88°, 90°, 92°, 94°, etc. By ensuring that the angle α between the axis of the first connecting pipe 14 and the axis of the first throttle 12 is 85° < a, the angle formed between the refrigerant flow direction and the axis of the first throttle 12 can be larger. When the refrigerant flow velocity is constant, the velocity component of the refrigerant flow towards the axis of the first throttle 12 can be smaller, resulting in less impact on the first throttle 12 along the axis, and more effectively reducing the vibration noise caused by the impact on the first throttle 12. By ensuring that the angle α between the axis of the first connecting pipe 14 and the axis of the first throttle 12 is a < 95°, the refrigerant flow can be smoother, avoiding excessive reverse bends during the refrigerant flow that would hinder flow. It can also make the processing of the connection between the first connecting pipe 14 and the first throttle 12 more convenient.

[0050] According to some embodiments of this utility model, refer to Figures 2-4 The axis of the connecting section 141 extends in a straight line. By extending the axis of the connecting section 141 in a straight line, the flow direction of the refrigerant when flowing through the connecting section 141 can be more balanced and uniform, allowing more refrigerant to flow in the straight direction of the axis of the connecting section 141, thus more fully reducing the velocity component of the refrigerant in the axial direction of the first throttle 12 and reducing the noise caused by the valve core being lifted by the refrigerant.

[0051] According to some embodiments of this utility model, refer to Figures 2-4 The outer surface of the plate heat exchanger 11 includes a mounting surface 119. The first interface 111, the second interface 112, the third interface 113, and the fourth interface 114 are all formed on the mounting surface 119. The angle between the axis of the connecting section 141 and the mounting surface 119 is b, where 80° < b < 100°. For example, if the axis of the connecting section 141 is L3, the value of b can be 81°, 85°, 90°, 95°, 97°, etc. By ensuring that the angle b between the axis of the connecting section 141 and the mounting surface 119 satisfies 80° < b < 100°, the connecting section 141 is made nearly perpendicular to the mounting surface 119, making it easier to install and cooperate with the first throttling device 12.

[0052] According to some embodiments of this utility model, refer to Figures 2-4 The first connection port 121 is formed on the outer periphery of the first throttle 12. By forming the first connection port 121 on the outer periphery of the first throttle 12, it is easier to connect the first throttle 12 to its first connecting pipe 14, and the angle between the axis of the first connecting pipe 14 and the axis of the first throttle 12 can be changed as needed, thereby reducing the vibration noise caused by the refrigerant impact on the first throttle 12.

[0053] According to some embodiments of this utility model, refer to Figures 2-4 The first connection port 121 faces the plate heat exchanger 11. By aligning the first connection port 121 with the plate heat exchanger 11, it is convenient for the first connecting pipe 14 to connect the first throttle 12 to the plate heat exchanger 11.

[0054] For example, the first connecting pipe 14 is a straight pipe, one end of the first connecting pipe 14 is connected to the plate heat exchanger 11, and the other end of the first connecting pipe 14 is connected to the first connecting port 121.

[0055] According to some embodiments of this utility model, refer to Figures 2-4A second connection port 122 is formed on one axial side of the first throttling device 12. The second connection port 122 is connected to a second connecting pipe 15, at least a portion of which extends axially along the first throttling device 12. By forming the second connection port 122 on one axial side of the first throttling device 12 and extending at least a portion of the second connecting pipe 15 axially along the first throttling device 12, the connection between the second connecting pipe 15 and the first throttling device 12 can be made more secure, and the overall structure of the plate heat exchanger assembly 1 can be made more compact.

[0056] According to some embodiments of this utility model, refer to Figures 2-4 The first throttle 12 is an electronic expansion valve with a needle-shaped valve core, the extension direction of which is consistent with the axial direction of the valve body. By aligning the extension direction of the valve core with the axial direction of the valve body, the electronic expansion valve can change its throttling capacity by moving the valve core along the axial direction of the valve body.

[0057] 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 each other along the length of the plate heat exchanger 11. 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. 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.

[0058] 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.

[0059] According to some embodiments of this utility model, refer to Figures 2-4 The heat exchanger assembly 1 also includes a second throttle 13, which is mounted on the plate heat exchanger 11 and includes a third connection port 131 and a fourth connection port 132. One of the third connection port 131 and the fourth connection port 132 serves as the inlet of the second throttle 13 and the other serves as the outlet of the second throttle 13. The third connection port 131 is connected to the second interface 112 through the first throttle 12, and the fourth connection port 132 is connected to the third interface 113.

[0060] For example, refer to Figure 5 , Figure 5The dashed arrows indicate the refrigerant flow direction when the air conditioning system 100 is in heating mode. After being discharged from the compressor 4's exhaust port 41, the refrigerant flows through the indoor heat exchanger 2. The refrigerant flowing from the indoor heat exchanger 2 enters the first heat exchange channel of the plate heat exchanger 11 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. It flows through the connecting section 141 of the first connecting pipe 14 and enters the first throttling device 12 through the second connection port 122. At this time, because there is an angle between the refrigerant flow direction and the axial direction of the first throttling device 12, the velocity component of the refrigerant in the axial direction of the first throttling device 12 is smaller, which reduces the impact force of the refrigerant on the valve core along the axial direction of the first throttling device 12, and reduces the noise generated by the refrigerant lifting the valve core. The refrigerant flowing out of the plate heat exchanger 11 from the second port 112 is divided into two paths. One path leaves the first throttling device 12 through the first connection port 121 and finally enters the outdoor heat exchanger 3. The other path enters the second throttling device 13 through the third connection port 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth connection port 132. At this time, the refrigerant temperature decreases due to the throttling effect of the second throttling device 13. The refrigerant then enters the second heat exchange channel of the plate heat exchanger 11 through the third port 113. The refrigerant in the first heat exchange channel heats up the refrigerant in the second heat exchange channel. Finally, it leaves the plate heat exchanger 11 through the fourth port 114 and flows into the compressor 4 through the return port 42 of the compressor 4.

[0061] 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.

[0062] For example, refer to Figure 5 , Figure 5The solid arrows indicate the refrigerant flow direction when the air conditioning system 100 is in cooling mode. After the refrigerant is discharged from the exhaust port 41 of the compressor 4, it flows through the outdoor heat exchanger 3. The refrigerant flowing out of the outdoor heat exchanger 3 enters the first throttling device 12 through the first connection port 121. At this time, the refrigerant is divided into two paths. One path leaves the first throttling device 12 through the second connection port 122 and enters the first heat exchange channel of the plate heat exchanger 11 through the second interface 112. 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 first interface 111. One path leads to the indoor heat exchanger 2; the other path leads to the second throttling device 13 through the third connection port 131. After being throttled by the second throttling device 13, it leaves the second throttling device 13 through the fourth connection port 132 and then enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. At this time, the refrigerant temperature decreases due to the throttling effect of the second throttling device 13. The refrigerant in the second heat exchange channel cools the refrigerant in the first heat exchange channel. Finally, it leaves the plate heat exchanger 11 through the fourth interface 114 and flows into the compressor 4 through the return port 42 of the compressor 4.

[0063] 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.

[0064] According to some embodiments of this utility model, refer to Figures 2-4 A fifth connection port 123 is formed on the first throttling device 12. The fifth connection port 123 is connected to the third connection port 131 via a third connecting pipe 16. The fifth connection port 123 is formed on the outer periphery of the first throttling device 12 and spaced apart from the first connection port 121. By connecting the fifth connection port 123 and the third connection port 131 via the third connecting pipe 16, the refrigerant in the first throttling device 12 can be passed into the second throttling device 13 and finally into the compressor 4, realizing the circulation of the refrigerant. By forming the fifth connection port 123 on the outer periphery of the first throttling device 12 and spaced apart from the first connection port 121, the process difficulty of connecting and installing the pipes can be reduced, and the mutual influence between the refrigerants in the first connecting pipe 14 and the third connecting pipe 16 during the flow process can be reduced.

[0065] According to some embodiments of this utility model, refer to Figures 2-4 The third connection port 131 is formed on the outer periphery of the second throttle 13, and the fourth connection port 132 is formed on the axial side of the second throttle 13. The fourth connection port 132 and the third interface 113 are connected by the third connection pipe 16.

[0066] For example, the third connecting pipe 16 has two bends, the two connecting ports of the third connecting pipe 16 face the same direction, one end of the third connecting pipe 16 is connected to the fourth connecting port 132, and the other end of the third connecting pipe 16 is connected to the third interface 113.

[0067] For example, when the air conditioning system 100 is in heating mode, the refrigerant flowing out from the indoor unit enters the first heat exchange channel of the plate heat exchanger 11 through the first interface 111. After heat exchange, it leaves the plate heat exchanger 11 through the second interface 112, flows through the connecting section 141 of the first connecting pipe 14, and enters the first throttling device 12 through the second connecting port 122. Since there is an angle between the flow direction of the refrigerant and the axial direction of the first throttling device 12, the impact force of the refrigerant on the axial direction of the first throttling device 12 is small, which can reduce the noise generated by the impact of the refrigerant on the first throttling device 12. At this time, the refrigerant is divided into two paths. One path leaves the first throttling device 12 through the first connection port 121 and enters the outdoor unit through the second connection pipe 15. The other path leaves the first throttling device 12 through the fifth connection port 123, flows through the third connection pipe 16, enters the second throttling device 13 through the third connection port 131, and after the throttling effect of the second throttling device 13, leaves the second throttling device 13 through the fourth connection port 132 and enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. After heat exchange, it leaves the plate heat exchanger 11 through the fourth interface 114 and flows to the compressor 4.

[0068] For example, when the air conditioning system 100 is in cooling mode, the refrigerant flowing from the outdoor unit enters the second connecting pipe 15 and enters the first throttling device 12 through the first connecting port 121. At this time, the refrigerant is divided into two paths. One path flows into the first connecting pipe through the second connecting port 122, and then into the first heat exchange channel of the plate heat exchanger 11 through the second interface 112 for heat exchange. After leaving the plate heat exchanger 11 through the first interface 111, it goes to the indoor unit. The other path leaves the first throttling device 12 through the fifth connecting port 123, flows through the third connecting pipe 16, enters the second throttling device 13 through the third connecting port 131, and after the throttling effect of the second throttling device 13, it leaves the second throttling device 13 through the fourth connecting port 132 and enters the second heat exchange channel of the plate heat exchanger 11 through the third interface 113. After heat exchange, it leaves the plate heat exchanger 11 through the fourth interface 114 and goes to the compressor 4.

[0069] 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.

[0070] According to some embodiments of this utility model, refer to Figure 3 The angle between the axis of the first throttling device 12 and the length direction of the plate heat exchanger 11 is α1, where 0° < α1 < 180°. For example, if the axis of the first throttling device 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 throttling device 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.

[0071] According to some embodiments of this utility model, refer to Figure 3 The angle between the axis of the second throttling device 13 and the length direction of the plate heat exchanger 11 is α2, where 0° < α2 < 180°. For example, if the axis of the second throttling device 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 throttling device 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.

[0072] 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°.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 < 60°. For example, θ can be 5°, 10°, 15°, 20°, 30°, 45°, 50°, 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 < 60°, 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. The axis of the second throttling device 13 refers to the axis of its valve core.

[0077] 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 0° < θ < 45°. For example, the value of θ can be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 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 0° < 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 maximum length of the first throttling device 12 and the second throttling device 13 in the width direction of the plate heat exchanger 11 will 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 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 < 45°, 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.

[0078] According to some embodiments of this utility model, the outer surface of the plate heat exchanger 11 includes a mounting surface 119. A first interface 111, a second interface 112, a third interface 113, and a fourth interface 114 are all formed on the mounting surface 119. The angle between the axis of the first throttle 12 and the mounting surface 119 is c, where -15° < c < 15°. For example, the axis of the first throttle 12 can be the axis of the throttling valve core of the first throttle 12, and the value of c can be -14°, -10°, -5°, 0°, 5°, 10°, 14°, etc. By ensuring that the angle c between the axis of the first throttle 12 and the mounting surface 119 satisfies -15° < c < 15°, the vibration wear of the valve core of the first throttle 12 can be reduced.

[0079] According to some embodiments of this utility model, the outer surface of the plate heat exchanger 11 includes a mounting surface 119. A first interface 111, a second interface 112, a third interface 113, and a fourth interface 114 are all formed on the mounting surface 119. The angle d between the axis of the second throttle 13 and the mounting surface 119 is -15° < d < 15°. For example, the axis of the second throttle 13 can be the axis of the throttling valve core of the second throttle 13, and the value of d can be -14°, -10°, -5°, 0°, 5°, 10°, 14°, etc. By ensuring that the angle d between the axis of the second throttle 13 and the mounting surface 119 satisfies -15° < d < 15°, the vibration wear of the valve core of the second throttle 13 can be reduced.

[0080] According to some embodiments of this utility model, refer to Figure 2 The plate heat exchanger assembly 1 includes a first filter 17, which is connected to a first interface 111. By including the first filter 17 in the plate heat exchanger assembly 1 and connecting it to the first interface 111, 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.

[0081] 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 plate heat exchanger 11 to the indoor heat exchanger 2, thereby reducing the risk of air conditioning system 100 failure due to pipe blockage.

[0082] For example, when the air conditioning system 100 is in heating mode, the first filter 17 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.

[0083] According to some embodiments of this utility model, refer to Figure 2 The plate heat exchanger assembly 1 includes a second filter 18 connected to a second connection port 122. By including the second filter 18 in the plate heat exchanger assembly 1 and connecting it to the second connection port 122, 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.

[0084] For example, when the air conditioning system 100 is in cooling mode, the second filter 18 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.

[0085] For example, when the air conditioning system 100 is in heating mode, the second filter 18 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.

[0086] An air conditioning system 100 according to a second aspect 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 of the present invention.

[0087] Both the indoor heat exchanger 2 and the outdoor heat exchanger 3 are connected to the compressor 4. According to the first aspect of the present invention, the first interface 111 of the plate heat exchanger assembly 1 is connected to the indoor heat exchanger 2, and the fourth interface 114 is connected to the compressor 4. The air conditioning system 100 has a heating mode. In the heating mode, the first throttling device 12 acts as a throttling device, and the refrigerant flows into the first heat exchange channel of the plate heat exchanger 11 through the first interface 111, and then flows into the first throttling device 12 via the second interface 112 and the first connecting pipe 14.

[0088] By allowing the refrigerant to flow into the first throttle valve 12 via the second interface 112 and the first connecting pipe 14 in heating mode, the flow direction of the refrigerant can form an angle with the axis of the first throttle valve 12 in heating mode. The velocity component of the refrigerant in the axial direction of the first throttle valve 12 is smaller, which can reduce the impact force of the refrigerant on the valve core in the axial direction of the first throttle valve 12 and reduce the noise caused by the valve core being lifted by the refrigerant.

[0089] According to the embodiment of the present invention, the air conditioning system 100 includes a plate heat exchanger assembly 1 according to the first aspect of the present invention. In heating mode, refrigerant flows into a first throttle valve 12 via a second interface 112 and a first connecting pipe 14. The flow direction of the refrigerant into the first throttle valve 12 forms an angle with the axis of the first throttle valve 12. The velocity component of the refrigerant in the axial direction of the first throttle valve 12 is relatively small, which can reduce the impact force of the refrigerant on the valve core along the axial direction of the first throttle valve 12 and on the valve port of the first throttle valve 12. This can reduce the vibration noise caused by the refrigerant impact on the first throttle valve 12, thereby reducing the noise generated when the first throttle valve 12 is working and reducing the noise of the plate heat exchanger assembly 1.

[0090] According to some embodiments of this utility model, refer to Figure 1The air conditioning system 100 has a cooling mode. In cooling mode, the first throttling device 12 is fully open. The air conditioning system 100 also includes a third throttling device 6, which is connected between the first interface 111 and the indoor heat exchanger 2. By including the third throttling device 6 in the air conditioning system 100, the third throttling device 6 can throttle the refrigerant entering the indoor heat exchanger 2. When the air conditioning system 100 is in cooling mode, the refrigerant flows out from the outdoor heat exchanger 3 and into the first throttling device 12. Since the first throttling device 12 is closer to the outdoor unit and farther from the indoor unit, the refrigerant loses heat during its journey from the first throttling device 12 into the indoor unit. Therefore, the first throttling device 12 can be fully open, and the throttling effect is achieved through the third throttling device 6, which is closer to the indoor unit. This reduces the heat loss of the refrigerant during its longer journey from the first throttling device 12 into the indoor unit, resulting in better heat exchange performance of the indoor heat exchanger 2.

[0091] Furthermore, when the refrigerant flows into the first throttle valve 12 through the first connection port 121, although the flow direction of the refrigerant is consistent with the axial direction of the first throttle valve 12, the refrigerant is not likely to collide with the valve core of the first throttle valve 12 because the first throttle valve 12 is in a fully open state when in the cooling state, thus reducing noise.

[0092] According to some embodiments of this utility model, the air conditioning system 100 further includes a four-way valve 5. The four-way valve 5 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 connection between the different valve ports can be adjusted according to the cooling or heating requirements to realize the refrigerant circulation path.

[0093] For example, refer to Figure 1 , Figure 1The 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 throttle valve 12 for throttling. After being throttled by the first throttle valve 12, the refrigerant is divided into two paths. One path of refrigerant flows through the second throttle valve 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.

[0094] 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.

[0095] The following reference Figures 1-5 The present invention describes a plate heat exchanger assembly 1 according to some specific embodiments of the present invention.

[0096] In this embodiment, the plate heat exchanger assembly 1 includes: a plate heat exchanger 11, a first throttle 12, and a second throttle 13.

[0097] 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.

[0098] The first throttle 12 is mounted on the plate heat exchanger 11 and includes a valve body and a valve core. The valve body has a first connection port 121, a second connection port 122, and a throttling channel connecting the first connection port 121 and the second connection port 122. The valve core is movably disposed in the throttling channel. One of the first connection port 121 and the second connection port 122 serves as the inlet of the first throttle 12 and the other serves as the outlet of the first throttle 12. The first connection port 121 and the second interface 112 are connected by a first connecting pipe 14. At least a portion of the first connecting pipe 14 in the extension direction constitutes a connecting section 141. The connecting section 141 is directly connected to the first connection port 121. The axis of the connecting section 141 extends in a straight line. The angle between the axis of the connecting section 141 and the axis of the first throttle 12 is α, where α satisfies 60° < α < 120°.

[0099] The second throttle 13 is installed on the plate heat exchanger 11 and includes a third connection port 131 and a fourth connection port 132. One of the third connection port 131 and the fourth connection port 132 serves as the inlet of the second throttle 13 and the other serves as the outlet of the second throttle 13. The third connection port 131 is connected to the second interface 112 through the first throttle 12, and the fourth connection port 132 is connected to the third interface 113.

[0100] The outer surface of the plate heat exchanger 11 includes a mounting surface 119. The first interface 111, the second interface 112, the third interface 113 and the fourth interface 114 are all formed on the mounting surface 119. The angle between the axis of the connecting section 141 and the mounting surface 119 is b, where 80° < b < 100°.

[0101] A first connection port 121 is formed on the outer periphery of the first throttling device 12 and faces the plate heat exchanger 11. A second connection port 122 is formed on the axial side of the first throttling device 12, and the second connection port 122 is connected to a second connecting pipe 15, at least a portion of which extends axially along the first throttling device 12. A fifth connection port 123 is formed on the first throttling device 12, and the fifth connection port 123 is connected to the third connection port 131 via a third connecting pipe 16. The fifth connection port 123 is formed on the outer periphery of the first throttling device 12 and is spaced apart from the first connection port 121. A third connection port 131 is formed on the outer periphery of the second throttling device 13, and a fourth connection port 132 is formed on the axial side of the second throttling device 13, and the fourth connection port 132 is connected to the third interface 113 via the third connecting pipe 16.

[0102] The first throttle 12 is an electronic expansion valve, with the valve core formed in a needle shape, and the extension direction of the valve core is consistent with the axial direction of the valve body.

[0103] The first throttling device 12 and the second throttling device 13 are arranged along the width direction of the plate heat exchanger 11. The plate heat exchanger 11 has a first end 117 and a second end 118 arranged opposite each other. The first port 111 and the fourth port 114 are located at the first end 117 of the plate heat exchanger 11, and the second port 112 and the third port 113 are located at the second end 118 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, where α1 satisfies 5° < α1 < 60°. The angle between the axis of the second throttling device 13 and the length direction of the plate heat exchanger 11 is α2, where α2 satisfies 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, where θ satisfies 5° < θ < 90°.

[0104] 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.

[0105] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0106] In the description of this utility model, "multiple" means two or more.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 first throttling device is mounted on the plate heat exchanger and includes a valve body and a valve core. The valve body has a first connection port, a second connection port, and a throttling channel connecting the first connection port and the second connection port. The valve core is movably disposed in the throttling channel. One of the first connection port and the second connection port serves as the inlet of the first throttling device, and the other serves as the outlet of the first throttling device. The first connection port and the second connection port are connected by a first connecting pipe. At least a portion of the first connecting pipe in its extension direction constitutes a connecting section. The connecting section is directly connected to the first connection port. The angle between the axis of the connecting section and the axis of the first throttling device is α, where 60° < α < 120°.

2. The plate heat exchanger assembly according to claim 1, characterized in that, 85°＜a＜95°。 3. The plate heat exchanger assembly according to claim 1, characterized in that, The axis of the connecting segment extends in a straight line.

4. The plate heat exchanger assembly according to claim 1, characterized in that, The outer surface of the plate heat exchanger includes a mounting surface. The first interface, the second interface, the third interface, and the fourth interface are all formed on the mounting surface. The angle between the axis of the connecting section and the mounting surface is b, where 80° < b < 100°.

5. The plate heat exchanger assembly according to claim 1, characterized in that, The first connection port is formed on the outer peripheral side of the first throttling device; and / or, the first connection port faces the plate heat exchanger.

6. The plate heat exchanger assembly according to claim 1, characterized in that, The second connection port is formed on one axial side of the first throttle, and the second connection port is connected to a second connection pipe, at least a portion of which extends along the axial direction of the first throttle.

7. The plate heat exchanger assembly according to claim 1, characterized in that, The first throttle is an electronic expansion valve, the valve core is needle-shaped, and the extension direction of the valve core is consistent with the axial direction of the valve body.

8. The plate heat exchanger assembly according to claim 1, characterized in that, The plate heat exchanger has a first end and a second end that are disposed opposite to each other along the length direction of the plate heat exchanger, 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.

9. The plate heat exchanger assembly according to claim 1, characterized in that, The heat exchanger assembly further includes a second throttling device, which is mounted on the plate heat exchanger and includes a third connection port and a fourth connection port. One of the third connection port and the fourth connection port serves as the inlet of the second throttling device and the other serves as the outlet of the second throttling device. The third connection port is connected to the second interface through the first throttling device, and the fourth connection port is connected to the third interface.

10. The plate heat exchanger assembly according to claim 9, characterized in that, The first throttle has a fifth connection port, which is connected to the third connection port via a third connection pipe. The fifth connection port is formed on the outer periphery of the first throttle and is spaced apart from the first connection port.

11. The plate heat exchanger assembly according to claim 9, characterized in that, The third connection port is formed on the outer peripheral side of the second throttle, and the fourth connection port is formed on the axial side of the second throttle. The fourth connection port and the third interface are connected by a third connection pipe.

12. The plate heat exchanger assembly according to claim 9, characterized in that, The first throttling device and the second throttling device are arranged along the width direction of the plate heat exchanger.

13. The plate heat exchanger assembly according to claim 9, characterized in that, The angle between the axis of the first throttle and the axis of the second throttle is θ, where 0° < θ < 60°.

14. The plate heat exchanger assembly according to claim 13, characterized in that, 0° < θ < 45°.

15. The plate heat exchanger assembly according to claim 9, characterized in that, The outer surface of the plate heat exchanger includes a mounting surface, and the first interface, the second interface, the third interface, and the fourth interface are all formed on the mounting surface. The angle between the axis of the first throttling device and the mounting surface is c, where -15° < c < 15°; and / or The outer surface of the plate heat exchanger includes a mounting surface. The first interface, the second interface, the third interface, and the fourth interface are all formed on the mounting surface. The angle between the axis of the second throttling device and the mounting surface is d, where -15° < d < 15°.

16. An air conditioning system, characterized in that, 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 1-15, wherein the first interface is connected to the indoor heat exchanger, and the fourth interface is connected to the compressor; The air conditioning system has a heating mode. In the heating mode, the first throttle acts as a throttling device. The refrigerant flows into the first heat exchange channel of the plate heat exchanger from the first interface, and then flows into the first throttle via the second interface and the first connecting pipe.

17. The air conditioning system according to claim 16, characterized in that, The air conditioning system has a cooling mode, in which the first throttle is fully open; the air conditioning system also includes a third throttle, which is connected between the first interface and the indoor heat exchanger.

18. The air conditioning system according to claim 16 or 17, characterized in that, 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.

Images