Plate heat exchanger with liquid storage function

Abstract

The invention provides a plate heat exchanger with a liquid storage function. The plate heat exchanger comprises an inlet and outlet side edge plate, a first part main heat exchange area, a second part refrigerant liquid storage area, a third part supercooling heat exchange area and a bottom side edge plate which are sequentially arranged. The second part refrigerant liquid storage area comprises a liquid storage structure frame, a liquid storage frame circulation channel is formed in the liquid storage structure frame, and a drying device is arranged in the liquid storage frame circulation channel; the refrigerant inlet pressing plate, the refrigerant flow channel of the first part main heat exchange area, the liquid storage frame circulation channel, the refrigerant flow channel of the third part supercooling heat exchange area and the refrigerant outlet pressing plate are communicated in sequence. The liquid storage structure frame is arranged in the plate heat exchanger, an external liquid storage structure does not need to be additionally arranged, connection through an external pipeline is avoided, and installation sealing interfaces are reduced; the volume of a product can be reduced, and the leakage risk of an internal refrigerant medium is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a plate heat exchanger with a liquid storage function. Background Art

[0002] The energy source of new energy vehicles, especially electric vehicles, is their battery system. The energy of the battery is not only used to overcome the rolling resistance generated by the tires when the vehicle is driving, the air resistance generated by the body and the air, but also to take into account the climate control of the passenger compartment and the thermal management of the on-board electronic components. If the climate control of the passenger compartment and the thermal management of the electronic components consume too much energy, it will affect the vehicle's cruising range. In order to better utilize the battery energy, coupling the energy of different circulation systems is one of the feasible technical solutions. For example, for the energy exchange between the coolant system and the refrigerant system, the refrigerant can reduce the coolant temperature to the required temperature and cool the battery, or introduce the coolant into the in-vehicle air conditioning system to cool the passenger compartment; or through the heat pump system of the refrigeration cycle, absorb energy from the coolant system, make full use of the waste heat of electronic components, and indirectly reduce battery energy consumption. In order to realize the interactive utilization of energy of these different systems, the application of plate heat exchanger products is indispensable.

[0003] Based on environmental regulations and environmental protection requirements, the research and development and application of new alternative refrigerant heat pump air conditioning systems have been put on the agenda. Some environmentally friendly refrigerants, such as R290, need to strictly control their charge volume due to their flammable and explosive properties. The indirect heat exchange system using a plate heat exchanger, combined with an integrated module structure, can make the structure of the refrigerant system more compact, effectively control the internal volume of the system, and thus control the charge volume.

[0004] Current plate heat exchanger products, including integrated modular products, generally use a separate liquid storage structure, which is connected to other parts of the system or integrated module through inlets and outlets, and generally requires a separate installation interface and sealing interface. For example, in patent CN 215705552 U, there is a separate liquid storage module. In patent CN 217347413 U, there is a separate liquid storage tank. In patent CN 220785393 U, there is a separate liquid storage tank. In patent CN 221437678 U, there is a liquid storage dryer brazed with the plate heat exchanger.

[0005] Independent liquid storage devices need to be assembled and sealed with other parts of the system, and these installation and sealing interfaces are subject to leakage risks. Some designs use pipes to connect the inlet and outlet of the liquid storage device with other parts of the system. These pipes will increase the resistance of the refrigerant in the system, which will have a negative impact on the energy efficiency of the system under different operating conditions.

[0006] Therefore, it is necessary to provide a plate heat exchanger with a liquid storage function for the plate heat exchanger products in the heat pump air-conditioning system of new energy vehicles, which does not require an additional external refrigerant storage area, avoids connection through external pipelines, reduces the installation of sealing interfaces, and reduces the risk of internal refrigerant medium leakage. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a plate heat exchanger with a liquid storage function.

[0008] According to the present invention, a plate heat exchanger with a liquid storage function is provided, the plate heat exchanger comprises: an inlet and outlet side plate, a first part main heat exchange area, a second part refrigerant liquid storage area, a third part subcooling heat exchange area and a bottom side plate arranged in sequence;

[0009] The inlet and outlet side plates are provided with a refrigerant inlet pressure plate, a coolant outlet pipe, a refrigerant outlet pressure plate and a coolant inlet pipe, the second part of the refrigerant liquid storage area includes a liquid storage structure frame, a liquid storage frame circulation channel is formed inside the liquid storage structure frame, and a drying device is provided in the liquid storage frame circulation channel;

[0010] The refrigerant inlet pressure plate, the refrigerant flow channel of the first part main heat exchange zone, the liquid storage frame circulation channel, the refrigerant flow channel of the third part supercooling heat exchange zone, and the refrigerant outlet pressure plate are connected in sequence.

[0011] Preferably, a first opening is formed on the refrigerant inlet pressure plate, and the opening is connected to the refrigerant flow channel in the first part of the main heat exchange area;

[0012] A second opening is provided on the refrigerant outlet pressure plate, and an inner jump pipe is installed on the inner wall of the second opening. The inner jump pipe passes through the first part main heat exchange area, the second part refrigerant liquid storage area and is connected with the refrigerant flow channel in the third part subcooling heat exchange area.

[0013] Preferably, a special plate is provided on the connection interface between the second refrigerant liquid storage area and the third subcooling heat exchange area, and the special plate is provided with a flange opening, and the flange opening cooperates with the outer wall surface of the inner jump pipe to form a sealing contact surface.

[0014] Preferably, the vertically arranged plate heat exchanger includes an inlet and outlet side edge plates, a first part main heat exchange area, a second part refrigerant storage area, a third part subcooling heat exchange area and a bottom side plate arranged in sequence from left to right, the refrigerant inlet pressure plate and the coolant outlet pipe are arranged on the upper part of the inlet and outlet side edge plates, and the refrigerant outlet pressure plate and the coolant inlet pipe are arranged on the lower part of the inlet and outlet side edge plates.

[0015] Preferably, a plastic cover, a plugging cover, a filter assembly, a cut-off structure, and a straw slot are sequentially arranged in the liquid storage structure frame from top to bottom, a straw is inserted into the straw slot, the other end of the straw extends to the bottom of the liquid storage structure frame, a hook structure is arranged on the outside of the straw slot, a drying bag is hung on the hook structure, and a double-layer lip structure and a filter are arranged on the filter assembly.

[0016] Preferably, the horizontally arranged plate heat exchanger includes an inlet and outlet side edge plates, a first part main heat exchange area, a second part refrigerant storage area, a third part subcooling heat exchange area and a bottom side plate arranged in sequence from top to bottom, the refrigerant inlet pressure plate and the coolant outlet pipe are arranged on one side of the inlet and outlet side edge plates, and the refrigerant outlet pressure plate and the coolant inlet pipe are arranged on the other side of the inlet and outlet side edge plates.

[0017] Preferably, a plastic cover, a plugging cover, a cut-off structure and a frame structure are sequentially arranged in the liquid storage structure frame, and a drying bag is installed in the frame structure.

[0018] Preferably, an open hole structure is provided at the bottom of the liquid storage structure frame on the side where the plugging cover is located, and the open hole structure is connected to the refrigerant flow channel in the third partial supercooling heat exchange zone.

[0019] Preferably, the liquid storage structure frame is provided with an opening, the plastic cover is detachably mounted on the opening, and a sealing ring is provided at the outer edge of the connection between the opening and the plastic cover.

[0020] Preferably, a retaining spring groove is provided on the liquid storage structure frame, a retaining spring is installed in the retaining spring groove, the blocking cover is installed on one side of the retaining spring, an O-ring is assembled on the blocking cover, and sealing surfaces are formed on both sides of the retaining spring groove.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a liquid storage structure frame inside the plate heat exchanger, which eliminates the need for an additional external liquid storage structure, avoids connection through external pipelines, and reduces the installation sealing interface; on the one hand, the volume of the product can be reduced, and on the other hand, the risk of internal refrigerant medium leakage can be reduced; and a drying device is provided in the liquid storage structure frame to absorb moisture in the refrigerant medium, thereby avoiding failure modes such as ice blockage in the refrigeration system and ensuring the stable operation of the system.

[0023] 2. The present invention connects the refrigerant outlet pressure plate with the third part of the supercooling heat exchange zone through an internal jump tube, and forms a sealing interface with the flange on a special plate to ensure that the refrigerant can flow out of the plate heat exchanger through the internal jump tube through the outlet pressure plate, thereby avoiding internal cross-flow in the heat exchanger.

[0024] 3. The present invention can filter the refrigerant medium by setting a filter structure, block impurities in the system, prevent them from flowing into other parts of the refrigerant system, and avoid affecting the normal operation of the electronic valve components in the system.

[0025] 4. The present invention arranges a lifting device on the vertical liquid storage structure frame to ensure that the liquid medium at the bottom of the second refrigerant storage area is transmitted to the third subcooling heat exchange area, thereby preventing the gaseous refrigerant from entering the third subcooling heat exchange area, thereby ensuring the stability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a vertical plate heat exchanger mainly embodied in the present invention;

[0028] Figure 2 It is an exploded view of a vertical plate heat exchanger mainly embodied in the present invention;

[0029] Figure 3 This is an exploded view of the vertical liquid storage structure frame mainly embodied in the present invention;

[0030] Figure 4 It is a side view of a vertical plate heat exchanger mainly embodied in the present invention;

[0031] Figure 5 The present invention mainly embodies Figure 4 Cross-sectional view of AA in the middle;

[0032] Figure 6 This is a schematic diagram of refrigerant circulation in a vertical plate heat exchanger mainly embodied in the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of a horizontal plate heat exchanger mainly embodied in the present invention;

[0034] Figure 8 This is an exploded view of a horizontal plate heat exchanger mainly embodied in the present invention;

[0035] Fig. 9 This is a top view of a horizontal plate heat exchanger mainly embodied in the present invention;

[0036] Fig.10 The present invention mainly embodies Fig. 9 Cross-section of BB.

[0037] Reference numerals:

[0038] Plate Heat Exchanger 100 Horizontal Plate Heat Exchanger 200

[0039] Refrigerant inlet pressure plate 101 Refrigerant outlet pressure plate 102

[0040] Coolant inlet pipe 103 Coolant outlet pipe 104

[0041] Plastic cover 105 Inlet and outlet side panels 106

[0042] Bottom side plate 107 Internal jump pipe 108

[0043] Special plate 109 Liquid storage structure frame 110

[0044] The first part is the main heat exchange area 121. The second part is the refrigerant liquid storage area 122.

[0045] The third part of the subcooling heat exchange area 123 the first opening 1011

[0046] Second opening 1021 Spring groove 1131

[0047] Opening 1050 Sealing ring 1051

[0048] Circlip 1052 Plug cover 1053

[0049] O-ring 1054 Filter assembly 1055

[0050] Filter 1056 Double-layer lip structure 1057

[0051] Straw slot 1058 Straw 1059

[0052] Flanged opening 1091 Cut-off structure 1101

[0053] First sealing surface 1121 Second sealing surface 1144

[0054] Hook structure 10510 Drying bag 10511

[0055] Horizontal liquid storage structure frame 210 filter screen 2012

[0056] Frame structure 2055 Opening structure 2102

[0057] O-ring sealing surface 2121 DETAILED DESCRIPTION

[0058] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0059] like Figure 1-6 As shown, a plate heat exchanger with a liquid storage function provided according to the present invention includes a plate heat exchanger 100 including: an inlet and outlet side edge plate 106, a first part main heat exchange area 121, a second part refrigerant liquid storage area 122, a third part subcooling heat exchange area 123 and a bottom side edge plate 107 arranged in sequence; a refrigerant inlet pressure plate 101, a coolant outlet pipe 104, a refrigerant outlet pressure plate 102 and a coolant inlet pipe 103 are arranged on the inlet and outlet side edge plate 106, and the second part refrigerant liquid storage area 122 includes a liquid storage structure frame 110, and a liquid storage frame circulation channel is formed inside the liquid storage structure frame 110, and a drying device is arranged in the liquid storage frame circulation channel; the refrigerant inlet pressure plate 101, the refrigerant flow channel of the first part main heat exchange area 121, the liquid storage frame circulation channel, the refrigerant flow channel of the third part subcooling heat exchange area 123, and the refrigerant outlet pressure plate 102 are connected in sequence.

[0060] Plate heat exchangers are generally arranged horizontally or vertically on a vehicle. The horizontal arrangement here refers specifically to the direction of the medium flow in the plate heat exchanger when the vehicle is stationary in a horizontal position, which is parallel to the horizontal plane. The vertical arrangement here refers specifically to the direction of the medium flow in the plate heat exchanger when the vehicle is stationary in a horizontal position, which is perpendicular to the horizontal plane. This application first describes a vertically arranged plate heat exchanger 100 as an example.

[0061] The second refrigerant storage area 122 of the plate heat exchanger 100 includes a liquid storage structure frame 110. The inlet and outlet of the refrigerant flow channel inside the liquid storage structure frame 110 are respectively located at the lower left and upper right of the liquid storage structure frame 110. The liquid storage structure frame 110 is provided with a lifting device and a drying device.

[0062] A first opening 1011 is provided on the refrigerant inlet pressure plate 101, and the opening 1011 is connected to the refrigerant flow channel in the first part main heat exchange zone 121; a second opening 1021 is provided on the refrigerant outlet pressure plate 102, and an inner jump pipe 108 is installed on the inner wall of the second opening 1021, and the inner jump pipe 108 passes through the first part main heat exchange zone 121, the second part refrigerant liquid storage zone 122 and is connected to the refrigerant flow channel in the third part subcooling heat exchange zone 123.

[0063] A special plate 109 is provided at the connection interface between the second refrigerant liquid storage area 122 and the third subcooling heat exchange area 123. The special plate 109 is provided with a flange opening 1091, and the flange opening 1091 cooperates with the outer wall surface of the inner jump tube 108 to form a sealing contact surface. The inner jump tube 108 connects the refrigerant outlet pressure plate 102 and the third subcooling heat exchange area 123, and forms a sealing interface with the flange 1091 on the special plate 109, ensuring that the refrigerant can flow out of the plate heat exchanger through the inner jump tube 108 and the outlet pressure plate 102, thereby avoiding the internal cross-flow phenomenon in the heat exchanger.

[0064] An opening 1050 is provided at the top of the liquid storage structure frame 110 , and a dustproof and waterproof plastic cover 105 is detachably mounted on the opening 1050 . A sealing ring 1051 is provided at the outer edge of the connection between the opening 1050 and the plastic cover 105 .

[0065] A retaining spring groove 1131 is provided on the inner side of the plastic cover 105, a retaining spring 1052 is installed in the retaining spring groove 1131, a plugging cover 1053 is installed on one side of the retaining spring 1052, an O-ring 1054 is assembled on the plugging cover 1053, and both sides of the retaining spring groove 1131 cooperate with the liquid storage structure frame 110 to form a first sealing surface 1121 and a second sealing surface 1144 respectively.

[0066] The lifting device of the liquid storage structure frame 110 includes a filter assembly 1055, a cut-off structure 1101 and a straw slot 1058 arranged in sequence from top to bottom. The filter assembly 1055 is detachably installed below the plugging cover 1053. The installation position of the filter assembly 1055 is limited by the cut-off structure 1101 and the plugging cover 1053. The filter assembly 1055 is provided with a double-layer lip structure 1057 and a filter 1056. A vertical straw 1059 is inserted into the straw slot 1058, and the other end of the straw 1059 extends to the bottom of the liquid storage structure frame 110. The function of the straw 1059 is to absorb the refrigerant and the mixture of the refrigerant and the lubricating oil at the bottom of the liquid storage structure frame 110, so that it passes through the filter 1056 and enters the third part of the subcooling heat exchange area 123 after being filtered. The condenser of the present application is in a refrigeration cycle system, and the compressor in the system provides power to drive the refrigerant to flow in the system. In order to ensure the stable operation of the system and the normal operation of the compressor, it is necessary to ensure that the liquid refrigerant / lubricant mixture flows out of the condenser. The double-layer lip structure 1057 on the filter assembly 1055 plays a sealing role, ensuring that the refrigerant can only pass through the suction pipe 1059 and enter the filter 1056 at the top, and then enter the third part of the subcooling heat exchange area 123.

[0067] The drying device of the liquid storage structure frame 110 includes a drying bag 10511 . A hook structure 10510 for hanging the drying bag 10511 is provided on the outside of the straw slot 1058 . The hook structure 10510 is provided on the inside of the cut-off structure 1101 .

[0068] The present application can filter the refrigerant medium by assembling a filter assembly 1055 inside the liquid storage structure frame 110, block the impurities in the system, prevent them from flowing into other parts of the refrigerant system, and avoid affecting the normal operation of the electronic valve components in the system. By installing a suction pipe 1059, it can ensure that the liquid medium at the bottom of the second part of the refrigerant liquid storage area 122 is transferred to the third part of the supercooling heat exchange area 123, and prevent the gaseous refrigerant from entering the third part of the supercooling heat exchange area 123, thereby ensuring the stability of the system operation.

[0069] The refrigerant flow path of the plate heat exchanger 100 is as follows: the refrigerant enters the upper inlet manifold of the first part main heat exchange area 121 from the refrigerant inlet pressure plate 101; the refrigerant flows from the inlet manifold into the heat exchange channel composed of corrugated plate sheets; the refrigerant enters the lower manifold of the first part main heat exchange area 121; the refrigerant enters the second part refrigerant liquid storage area 122 from the lower manifold and can be stored in the second part refrigerant liquid storage area 122; the refrigerant is lifted to the upper area of ​​the liquid storage structure frame 110 through the suction pipe 1059; the refrigerant passes through the filter assembly 1055; the refrigerant enters the third part subcooling heat exchange area 123; the refrigerant enters the refrigerant outlet pressure plate 102 through the internal jump pipe 108, and then flows out of the plate heat exchanger 100.

[0070] like Figure 7-10 As shown, in other specific embodiments, another form of the plate heat exchanger 100 is a horizontal plate heat exchanger 200. The second part of the refrigerant liquid storage area 122 of the horizontal plate heat exchanger 200 includes a horizontal liquid storage structure frame 210, and the inlet and outlet of the refrigerant flow channel inside the horizontal liquid storage structure frame 210 are respectively located at the upper left and lower right of the horizontal liquid storage structure frame 210; the liquid storage structure frame 110 and the horizontal liquid storage structure frame 210 are both provided with a drying device.

[0071] A detachable filter screen 2012 is installed in the first opening 1011 on the refrigerant inlet pressure plate 101 of the horizontal liquid storage structure frame 210, which can filter the refrigerant medium and block the impurities in the system to prevent them from flowing into other parts of the refrigerant system and affecting the normal operation of the electronic valve components in the system. The filter screen 2012 has a lip structure, which can be interference-fitted with the inner wall of the first opening 1011 of the refrigerant inlet pressure plate 101, and the installation and insertion direction of the filter screen 2012 is consistent with the refrigerant flow direction.

[0072] The drying device of the horizontal liquid storage structure frame 210 includes a drying bag 10511 . A frame structure 2055 for installing the drying bag 10511 is arranged inside the horizontal liquid storage structure frame 210 . The frame structure 2055 is arranged on the top of the horizontal liquid storage structure frame 210 .

[0073] An open hole structure 2102 is provided at the bottom of the horizontal liquid storage structure frame 210 , and the open hole structure 2102 is connected to the refrigerant flow channel in the third partial subcooling heat exchange area 123 .

[0074] An opening 1050 is provided on one side of the horizontal liquid storage structure frame 210 near the opening structure 2102, and a dustproof and waterproof plastic cover 105 is detachably installed on the opening 1050, and a sealing ring 1051 is provided on the outer edge of the connection between the opening 1050 and the plastic cover 105. A retaining spring groove 1131 is provided on the inner side of the plastic cover 105, and a retaining spring 1052 is installed in the retaining spring groove 1131. A plugging cover 1053 is installed on one side of the retaining spring 1052, and an O-ring 1054 is assembled on the plugging cover 1053, which cooperates with the horizontal liquid storage structure frame 210 to form an O-ring sealing surface 2121. The horizontal liquid storage structure frame 210 is provided with a stopper structure 1101 on the inner side of the O-ring sealing surface 2121, and the installation position of the plugging cover 1053 is limited by the retaining spring 1052 and the stopper structure 1101.

[0075] The refrigerant flow path of the horizontal plate heat exchanger 200 is as follows: the refrigerant enters the right side inlet manifold of the first part main heat exchange area 121 from the refrigerant inlet pressure plate 101; the refrigerant flows from the inlet manifold into the heat exchange channel composed of corrugated plate sheets; the refrigerant enters the left side manifold of the first part main heat exchange area 121; the refrigerant enters the second part refrigerant liquid storage area 122 from the left side manifold, and can be stored in the second part refrigerant liquid storage area 122, and can flow into the inlet manifold of the third part subcooling heat exchange area 123; the refrigerant enters the refrigerant outlet pressure plate 102 through the internal jump pipe 108 and then flows out of the horizontal plate heat exchanger 200.

[0076] In addition to the detachable parts in the liquid storage structure frame, the rest of the application can be integrally formed through the brazing process. That is, the inlet and outlet side panels 106, the first part of the main heat exchange area 121, the liquid storage structure frame of the second part of the refrigerant storage area 122, the third part of the subcooling heat exchange area 123 and the bottom side panels 107, these parts are made of aluminum alloy and can be assembled and formed; after assembly, they can be welded into one through the brazing process. After the plate heat exchanger is implemented and the brazing process is completed, the parts in the liquid storage frame structure are assembled into the plate heat exchanger to form a complete functional product.

[0077] This application provides a liquid storage structure frame inside the plate heat exchanger, eliminating the need for an additional external liquid storage structure, avoiding connection through external pipes, and reducing the installation sealing interface; on the one hand, it can reduce the volume of the product, and on the other hand, it can reduce the risk of internal refrigerant medium leakage. In addition, a drying device is provided in the liquid storage structure frame to absorb moisture in the refrigerant medium, avoiding failure modes such as ice blockage in the refrigeration system, and ensuring the stable operation of the system.

[0078] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0079] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A plate heat exchanger with liquid storage function, characterized in that: The plate heat exchanger (100) comprises: an inlet and outlet side plate (106), a first main heat exchange area (121), a second refrigerant liquid storage area (122), a third subcooling heat exchange area (123), and a bottom side plate (107) arranged in sequence; The inlet and outlet side plates (106) are provided with a refrigerant inlet pressure plate (101), a coolant outlet pipe (104), a refrigerant outlet pressure plate (102) and a coolant inlet pipe (103); the second refrigerant liquid storage area (122) comprises a liquid storage structure frame (110); a liquid storage frame circulation channel is formed inside the liquid storage structure frame (110); a drying device is provided inside the liquid storage frame circulation channel; The refrigerant inlet pressure plate (101), the refrigerant flow channel of the first part main heat exchange area (121), the liquid storage frame circulation channel, the refrigerant flow channel of the third part subcooling heat exchange area (123), and the refrigerant outlet pressure plate (102) are connected in sequence.

2. The plate heat exchanger with liquid storage function according to claim 1, characterized in that: The refrigerant inlet pressure plate (101) is provided with a first opening (1011), and the opening (1011) is in communication with the refrigerant flow channel in the first partial main heat exchange area (121); The refrigerant outlet pressure plate (102) is provided with a second opening (1021), and an inner jump pipe (108) is installed on the inner wall of the second opening (1021). The inner jump pipe (108) passes through the first part main heat exchange area (121), the second part refrigerant liquid storage area (122) and is connected with the refrigerant flow channel in the third part subcooling heat exchange area (123).

3. The plate heat exchanger with liquid storage function according to claim 2, characterized in that: A special plate (109) is provided on the connection interface between the second part refrigerant liquid storage area (122) and the third part subcooling heat exchange area (123), and a flange opening (1091) is opened on the special plate (109), and the flange opening (1091) cooperates with the outer wall surface of the inner jump pipe (108) to form a sealing contact surface.

4. The plate heat exchanger with liquid storage function according to claim 1, characterized in that: The vertically arranged plate heat exchanger (100) includes an inlet and outlet side plate (106), a first part main heat exchange area (121), a second part refrigerant liquid storage area (122), a third part subcooling heat exchange area (123) and a bottom side plate (107) arranged in sequence from left to right, the refrigerant inlet pressure plate (101) and the coolant outlet pipe (104) are arranged on the upper part of the inlet and outlet side plate (106), and the refrigerant outlet pressure plate (102) and the coolant inlet pipe (103) are arranged on the lower part of the inlet and outlet side plate (106).

5. The plate heat exchanger with liquid storage function according to claim 4, characterized in that: The liquid storage structure frame (110) is provided with a plastic cover (105), a plugging cover (1053), a filter assembly (1055), a stopper structure (1101), and a straw slot (1058) in order from top to bottom; a straw (1059) is inserted into the straw slot (1058); the other end of the straw (1059) extends to the bottom of the liquid storage structure frame (110); a hook structure (10510) is provided on the outside of the straw slot (1058); a drying bag (10511) is hung on the hook structure (10510); and a double-layer lip structure (1057) and a filter (1056) are provided on the filter assembly (1055).

6. The plate heat exchanger with liquid storage function according to claim 1, characterized in that: The horizontally arranged plate heat exchanger (100) includes an inlet and outlet side edge plate (106), a first part main heat exchange area (121), a second part refrigerant liquid storage area (122), a third part subcooling heat exchange area (123) and a bottom side edge plate (107) arranged in sequence from top to bottom, the refrigerant inlet pressure plate (101) and the coolant outlet pipe (104) are arranged on one side of the inlet and outlet side edge plate (106), and the refrigerant outlet pressure plate (102) and the coolant inlet pipe (103) are arranged on the other side of the inlet and outlet side edge plate (106).

7. The plate heat exchanger with liquid storage function according to claim 6, characterized in that: The liquid storage structure frame (110) is provided with a plastic cover (105), a blocking cover (1053), a stopper structure (1101), and a frame structure (2055) in sequence, and a drying bag (10511) is installed in the frame structure (2055).

8. The plate heat exchanger with liquid storage function according to claim 7, characterized in that: An open hole structure (2102) is provided at the bottom of the liquid storage structure frame (110) on the side where the blocking cover (1053) is located, and the open hole structure (2102) is connected to the refrigerant flow channel in the third partial subcooling heat exchange zone (123).

9. The plate heat exchanger with liquid storage function according to claim 5 or 7, characterized in that: The liquid storage structure frame (110) is provided with an opening (1050), the plastic cover (105) is detachably mounted on the opening (1050), and a sealing ring (1051) is provided at the outer edge of the connection between the opening (1050) and the plastic cover (105).

10. The plate heat exchanger with liquid storage function according to claim 5 or 7, characterized in that: The liquid storage structure frame (110) is provided with a retaining ring groove (1131), a retaining ring (1052) is installed in the retaining ring groove (1131), the blocking cover (1053) is installed on one side of the retaining ring (1052), an O-ring (1054) is assembled on the blocking cover (1053), and sealing surfaces are formed on both sides of the retaining ring groove (1131).

Images