A carbon dioxide cooling and heating integrated heat exchanger

Abstract

The present invention discloses a carbon dioxide cooling and heating integrated heat exchanger, which relates to the technical field of new energy battery thermal management systems. The present invention includes a base and a water chamber shell installed in the middle of its upper surface, and a left plate and a right plate are installed on both sides of the interior of the water chamber shell, respectively. A middle partition is sealed and installed at the inner center of the water chamber shell, and a corrugated plate is arranged between the first flat tube and the second flat tube and on the outside. The present invention can slow down the flow speed of the liquid on the battery pack side inside the water chamber shell through a plurality of slidingly connected corrugated plates, thereby enhancing the heat exchange efficiency of the core. At the same time, the corrugated plate has a simple structure and does not affect the overall layout. At the same time, the limiting assembly is used to facilitate the staff to quickly disassemble and replace the first flat tube and the second flat tube, and the position design of the left plate, the right plate, the baffle plate and the middle partition can realize the cooling and heating functions of the battery.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy battery thermal management systems, and in particular relates to a carbon dioxide cooling and heating integrated heat exchanger. Background Art

[0002] As users' requirements for new energy vehicles increase, new energy battery thermal management systems have met users' needs well. New energy battery thermal management systems are a system that uses carbon dioxide as a refrigerant and are often used in electric vehicles, hybrid vehicles and other new energy vehicles. Compared with traditional R134a refrigerants, carbon dioxide battery thermal management systems have lower environmental impact and higher safety, and can better meet the energy efficiency requirements of new energy vehicles. This system can effectively reduce the negative impact of automotive battery thermal management systems on the environment and meet the requirements of sustainable development.

[0003] At present, new energy battery packs generally use plate-fin heat exchangers as key components of the new energy battery thermal management system, which are responsible for cooling and heating the battery pack. For example, the plate-fin heat exchanger with patent announcement number CN117367175B discloses a high-strength plate-fin heat exchanger with integrated cold and hot functions. The existing heat exchanger uses a pushing mechanism and a trajectory disruption mechanism to achieve rapid flow and turbulence of the battery coolant to achieve the purpose of improving the cooling efficiency. However, the mechanism involves many components, a complicated structure, and occupies a large space, which affects the layout of the entire new energy vehicle chassis. At the same time, when internal components are damaged, due to the tight internal structure design, The heat exchange tubes (flat tubes, cylindrical straight tubes) in the existing heat exchanger are directly welded and fixed on the outer walls of the diverter tubes on both sides at both ends, so it is difficult to quickly disassemble and replace the heat exchange tubes. During the maintenance of the heat exchanger, the heat exchange tubes in the middle are often removed, so it is necessary to remove multiple heat exchange tubes or directly replace the internal heat exchange core, resulting in waste; finally, the existing carbon dioxide heat exchanger cannot integrate the cooling core and the heating core, so it is difficult to achieve the cooling and heating functions of the battery, and the heating and cooling devices need to be installed separately, which cannot meet people's needs; therefore, it is necessary to improve the existing technology to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a carbon dioxide cooling and heating integrated heat exchanger. By utilizing a plurality of corrugated plates, the flow speed of liquid on the battery pack side in the water chamber shell can be slowed down, thereby enhancing the heat exchange efficiency of the core body. The corrugated plates are slidably connected to facilitate subsequent staff to disassemble and replace the corrugated plates. At the same time, the corrugated plates have a simple structure and good heat exchange efficiency. The internal space of the water chamber shell can be reasonably utilized to avoid affecting the overall layout of the subsequent new energy vehicle chassis. At the same time, the elastic properties of the torsion spring and the spring in the limit assembly are used to realize the disassembly and assembly of the first flat tube or the second flat tube, which is convenient for staff to quickly disassemble and replace the first flat tube and the second flat tube, saving time and effort and having high work efficiency. In addition, through the position design of the left plate, the right plate, the baffle plate and the middle partition plate, the battery pack liquid can exchange heat with the carbon dioxide refrigerant, and can also exchange heat with the PTC side liquid, thereby realizing the cooling and heating functions of the battery. The heating and cooling devices do not need to be installed separately, thereby meeting people's needs.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention discloses a carbon dioxide cooling and heating integrated heat exchanger, comprising a base and a water chamber shell installed in the middle of its upper surface, wherein T-shaped grooves are arranged at both front and rear ends of both sides of the upper surface of the base, a left plate and a right plate are respectively installed at both sides of the interior of the water chamber shell, a middle partition is sealed and installed at the center position of the interior of the water chamber shell, first flat tubes are evenly installed at the front and rear ends of the left side between the left plate and the middle partition from top to bottom, second flat tubes are evenly installed at the front and rear ends of the right side between the right plate and the middle partition from top to bottom, corrugated plates are arranged between the upper and lower adjacent first flat tubes and the upper and lower adjacent second flat tubes, a slide plate is fixedly connected to the outer wall of one side of the corrugated plate, a second magnetic block is embedded in the center position of the rear end face of the slide plate, alternating square grooves are evenly arranged at front to back on the upper surface of the slide plate, and single square grooves are evenly arranged at intervals on the lower surface of the slide plate; wherein the alternating square grooves and the lower single square grooves are alternately arranged front to back, and through holes are opened between the alternating square grooves and the adjacent single square grooves.

[0007] The present invention is further configured such that a battery pack side liquid inlet pipe and a battery pack side liquid outlet pipe are respectively provided on one side above the front and rear end surfaces of the water chamber shell, and a carbon dioxide refrigerant inlet and outlet pressure plate is installed at the edge of one side of the upper surface of the water chamber shell.

[0008] The present invention is further configured such that a carbon dioxide refrigerant inlet and a carbon dioxide refrigerant outlet are respectively provided at the front and rear ends of the upper surface of the carbon dioxide refrigerant inlet and outlet pressure plates, a PTC side liquid inlet pipe and a PTC side liquid outlet pipe are respectively provided at the front and rear ends of the top of the right plate, and overflow holes are opened at the front and rear ends inside the middle partition from top to bottom.

[0009] The present invention is further configured such that mounting seats are provided on the opposite end surfaces of the left plate and the right plate, telescopic tubes are evenly installed at the front and rear ends of the inner walls of the mounting seats from top to bottom, springs are provided between the upper and lower adjacent telescopic tubes, and the other end of the telescopic tube is fixedly installed on the inner wall of the docking seat.

[0010] The present invention is further configured such that sliding grooves are evenly spaced from top to bottom at the front and rear ends of the outer wall of the docking seat, a docking groove is opened between the upper and lower adjacent sliding grooves, a first magnetic block is embedded in the center position of the inner wall of the slide groove, and the first magnetic block and the second magnetic block are arranged correspondingly; wherein, a docking sleeve is correspondingly arranged on the outer side of the front and rear end openings of the U-shaped through groove, a through opening is opened on one side of the bottom of the baffle, the two ends of the spring are respectively fixed on the inner wall of the mounting seat and the inner wall of the docking seat, and sealing rings are bonded to the docking sleeve and the inner wall of the docking groove.

[0011] The beneficial effects of the present invention are as follows: by arranging corrugated plates above and below the first flat tube and the second flat tube, and the upper and lower surfaces of the corrugated plates are respectively provided with alternating square grooves and single square grooves, and through holes are opened in the middle of the adjacent inner walls of the alternating square grooves and the single square grooves, the flow speed of the liquid on the battery pack side inside the water chamber shell can be slowed down, and the heat exchange efficiency of the core body is enhanced, wherein the slide plate on the outer wall of the corrugated plate is slidably connected inside the corresponding slide groove, and the inner wall of the slide groove and the middle part of the inner wall of the slide plate are magnetically mounted by the first magnetic block and the second magnetic block, so as to facilitate the subsequent staff to disassemble, assemble and replace the corrugated plate, and the work efficiency is high. At the same time, the corrugated plate has a simple structure and good heat exchange efficiency, and can reasonably utilize the internal space of the water chamber shell to avoid affecting the overall layout of the subsequent new energy vehicle chassis.

[0012] The present invention is further configured such that a limiting assembly is arranged inside the T-slot, the limiting assembly comprising a pressing block and a first rocker fixedly connected to the bottom of an outer wall on one side thereof, and the front and rear ends of the bottom of the first rocker are connected to the outer wall of the first rotating shaft through a connecting block.

[0013] The present invention is further configured such that a torsion spring is sleeved on the outer side of the outer wall of the first rotating shaft, and the edges of one side of the end surfaces at both the front and rear ends of the first rocker are rotatably connected with multi-angle connecting rods.

[0014] The present invention is further configured such that the other end of the multi-angle connecting rod is rotatably connected to the center position of the inner wall of the corresponding second rocker, and a second rotating shaft is installed at the center position of the lower surface of the second rocker; wherein the front and rear ends of the first rotating shaft are respectively rotatably connected to the bearings on the inner walls on both sides of the T-slot, and the two ends of the second rotating shaft are respectively rotatably connected to the bearings on the inner walls on both sides of the T-slot.

[0015] Another beneficial effect of the present invention is that the limiting effect of the outer end of the second rocker plate on the bottom of the inner docking seat can be achieved or cancelled under the elastic performance of the torsion spring, and then the docking seat can be driven to move under the elastic performance of the spring, so that the first flat tube or the second flat tube on the inside can be moved to complete the entire installation or disassembly action, thereby facilitating the staff to quickly disassemble and replace the first flat tube and the second flat tube, saving time and effort and achieving high work efficiency.

[0016] The present invention is further configured such that a docking sleeve is fixedly connected between upper and lower adjacent overflow holes, U-shaped through grooves are evenly spaced from top to bottom on both sides of the interior of the middle partition, and baffles are sealed and installed in the middle between the middle partition and the left and right plates.

[0017] The present invention is further configured such that oblong inner holes are evenly spaced from front to back inside the first flat tube, and square inner holes are evenly spaced from front to back inside the second flat tube; wherein the thickness of the first flat tube and the second flat tube are both 2 mm, and the outer diameter is designed to be 30 mm. The first flat tube has more inner holes, which ensures that the strength meets the performance requirements of 17 MPa and 34 MPa for the carbon dioxide refrigerant side and increases its heat exchange capacity.

[0018] Another beneficial effect of the present invention is that the water chamber shell is divided into four spaces by designing the positions of the left plate, the right plate, the baffle and the middle partition, wherein the left plate separates the imported carbon dioxide refrigerant from the exported carbon dioxide refrigerant, the right plate separates the PTC imported liquid from the PTC exported liquid, the front and rear spaces on the left side are the carbon dioxide refrigerant circulation cooling parts, the front and rear spaces on the right side are the PTC side liquid circulation heating parts, the middle partition separates the PTC side liquid and the carbon dioxide refrigerant, and at the same time connects the battery pack side liquid, so that the battery pack liquid can exchange heat with the carbon dioxide refrigerant, and can also exchange heat with the PTC side liquid, so that the cooling and heating functions of the battery can be realized, and the heating and cooling devices do not need to be installed separately, thereby meeting people's needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a carbon dioxide cooling and heating integrated heat exchanger;

[0021] Figure 2 A cross-sectional view of a carbon dioxide cooling and heating integrated heat exchanger;

[0022] Figure 3 This is a disassembled diagram of a carbon dioxide cooling and heating integrated heat exchanger;

[0023] Figure 4 This is the structural diagram of the base;

[0024] Figure 5 The structure of the left and right panels is shown in Figure 1. Figure 1 ;

[0025] Figure 6 The structure of the left and right panels is shown in Figure 1. Figure 2 ;

[0026] Figure 7 This is the structural diagram of the middle partition;

[0027] Figure 8 is a cross-sectional view of the middle partition;

[0028] Fig. 9 is a structural diagram of the first flat tube and the second flat tube;

[0029] Fig.10 Schematic diagram of the structure of the corrugated plate Figure 1 ;

[0030] Fig.11 Schematic diagram of the structure of the corrugated plate Figure 2 ;

[0031] Fig.12 This is a structural diagram of the limit assembly.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 100-base, 101-T-slot, 102-water chamber shell, 102a-liquid inlet pipe on battery pack side, 102b-liquid outlet pipe on battery pack side, 103-carbon dioxide refrigerant inlet and outlet pressure plates, 103a-carbon dioxide refrigerant inlet, 103b-carbon dioxide refrigerant outlet, 104-left plate, 105-right plate, 105a-PTC side liquid inlet pipe, 105b-PTC side liquid outlet pipe, 106-middle partition, 106a-butt sleeve, 106b-overflow hole, 106c-U-shaped through groove, 107-baffle, 108-mounting seat, 108a-telescopic tube, 108b-spring, 109-docking seat, 109a-docking groove, 109b-slide groove, 109c-first magnetic block, 1010-first flat tube, 1011-second flat tube, 200-corrugated plate, 201-slide plate, 201a-second magnetic block, 202-alternating square grooves, 203-single square groove, 300-limiting assembly, 301-pressing block, 302-first seesaw, 303-first rotating shaft, 304-torsion spring, 305-multi-angle connecting rod, 306-second seesaw, 307-second rotating shaft. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example 1

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , which is the first embodiment of the present invention, provides a carbon dioxide cooling and heating integrated heat exchanger, by arranging a corrugated plate 200 with alternating square grooves 202 and a single square groove 203 and slidably installed above and below the first flat tube 1010 and the second flat tube 1011, thereby greatly improving the heat exchange efficiency, and the subsequent staff can disassemble and replace the corrugated plate 200.

[0036] Specifically, the base 100 and the water chamber shell 102 installed in the middle of the upper surface thereof, T-shaped grooves 101 are provided on both front and rear ends of the upper surface of the base 100, a left plate 104 and a right plate 105 are respectively installed on both sides of the interior of the water chamber shell 102, a middle partition 106 is sealed and installed at the center position of the interior of the water chamber shell 102, first flat tubes 1010 are evenly installed at the front and rear ends of the left side between the left plate 104 and the middle partition 106 from top to bottom, and second flat tubes 1011 are evenly installed at the front and rear ends of the right side between the right plate 105 and the middle partition 106 from top to bottom; a battery pack side liquid inlet pipe 102a and a battery pack side liquid outlet pipe 102b are respectively provided on one side above the end surfaces of the front and rear ends of the water chamber shell 102, and a carbon dioxide refrigerant inlet and outlet pressure plate 103 is installed at the edge of one side of the upper surface of the water chamber shell 102; A carbon dioxide refrigerant inlet 103a and a carbon dioxide refrigerant outlet 103b are respectively provided at the front and rear ends of the upper surface of the carbon dioxide refrigerant inlet and outlet pressure plate 103, and a PTC side liquid inlet pipe 105a and a PTC side liquid outlet pipe 105b are respectively provided at the front and rear ends of the top of the right plate 105, and overflow holes 106b are opened at the front and rear ends of the interior of the middle partition 106 from top to bottom; grooves 109b are evenly spaced at the front and rear ends of the outer wall of the docking seat 109 from top to bottom, and a docking groove 109a is opened between the upper and lower adjacent grooves 109b, and a first magnetic block 109c is embedded in the center of the inner wall of the groove 109b, and the first magnetic block 109c is correspondingly arranged with the second magnetic block 201a; wherein, a docking sleeve 106a is correspondingly arranged outside the front and rear end openings of the U-shaped through groove 106c, and a through opening is opened on one side of the bottom of the baffle 107.

[0037] When the above arrangement is in use, when it is necessary to realize the cooling and heating functions in the thermal management system of the new energy battery, the battery pack side liquid for cooling or heating is first introduced into the water chamber shell 102 through the battery pack side liquid inlet pipe 102a. After the battery pack side liquid enters the water chamber shell 102, when cooling is required, the carbon dioxide refrigerant is introduced into the left side plate 104 through the carbon dioxide refrigerant inlet 103a. The carbon dioxide refrigerant enters the corresponding telescopic tubes 108a through the multiple through holes opened at the rear end of the mounting seat 108, and then flows into the multiple first flat tubes 1010 in the docking groove 109a on the docking seat 109 through the telescopic tube 108a. The multiple first flat tubes 1010 at the rear end are connected with the multiple first flat tubes 1010 at the front end through the U-shaped through groove 106c set in the middle partition 106. Finally, the carbon dioxide refrigerant absorbs heat and flows out from the front end of the top of the left side plate 104 The carbon dioxide refrigerant is discharged through the outlet 103b at the end, so that the flow trajectory of the carbon dioxide refrigerant in the core is U-shaped, so as to achieve the purpose of cooling the liquid on the battery pack side. Similarly, when the liquid on the battery pack side needs to be heated, the purpose of heating the liquid on the battery pack side by the PTC side liquid is achieved through the PTC side liquid inlet pipe 105a, the PTC side liquid outlet pipe 105b, the middle partition 106, the U-shaped through groove 106c and the second flat tube 1011. During the flow of the battery pack side liquid in the water chamber shell 102, it will flow through the multiple overflow holes 106b on the middle partition 106. At the same time, baffles 107 are provided on both sides of the water chamber shell 102, and a through hole is provided at the bottom of the baffle 107, so that the flow trajectory of the front and rear ends of the battery pack side liquid is also U-shaped, which increases the heat exchange time of the carbon dioxide refrigerant, the PTC side liquid and the battery pack side liquid, and improves the heat exchange efficiency.

[0038] Furthermore, the water chamber shell 102 is sealed and installed on the upper surface of the base 100, and the left plate 104 and the right plate 105 are arranged opposite to each other and have the same shape, size, etc. The internal space of the left plate 104 and the right plate 105 is divided into two parts, front and back, and the carbon dioxide refrigerant inlet 103a and the carbon dioxide refrigerant outlet 103b, as well as the PTC side liquid inlet pipe 105a and the PTC side liquid outlet pipe 105b are separated. The overflow hole 106b on the middle partition 106 can allow the battery pack side liquid in the left and right spaces to circulate, thereby realizing the cooling and heating functions.

[0039] See also Figure 3 , Fig.10 and Fig.11A corrugated plate 200 is arranged between the upper and lower adjacent first flat tubes 1010 and the upper and lower adjacent second flat tubes 1011, a slide plate 201 is fixedly connected to the outer wall of one side of the corrugated plate 200, a second magnetic block 201a is embedded in the center position of the rear end surface of the slide plate 201, and alternating square grooves 202 are evenly spaced from front to back on the upper surface of the slide plate 201, and single square grooves 203 are evenly spaced on the lower surface of the slide plate 201; wherein, the alternating square grooves 202 and the lower single square grooves 203 are alternately arranged front to back, and a through hole is opened between the alternating square grooves 202 and the adjacent single square grooves 203.

[0040] When the above arrangement is in use, since the upper and lower parts of the first flat tube 1010 and the second flat tube 1011 are slidably connected with the corrugated plate 200, and the upper and lower surfaces of the corrugated plate 200 are respectively provided with alternating square grooves 202 and single square grooves 203, and through holes are opened in the middle of the adjacent inner walls of the alternating square grooves 202 and the single square grooves 203, the flow speed of the liquid on the battery pack side inside the water chamber shell 102 can be delayed, and the heat exchange efficiency of the core body is enhanced. Among them, the slide plate 201 on the outer wall of the corrugated plate 200 is slidably connected inside the corresponding slide groove 109b, and the inner wall of the slide groove 109b and the middle part of the inner wall of the slide plate 201 are magnetically installed by the first magnetic block 109c and the second magnetic block 201a, so that the subsequent staff can disassemble and replace the corrugated plate 200, and the work efficiency is high.

[0041] Furthermore, the corrugated plate 200 is provided with multiple blocks, which are located above and below the first flat tube 1010 and the second flat tube 1011. The slide plate 201 is slidably installed inside the corresponding slide groove 109b. There are multiple first magnetic blocks 109c and second magnetic blocks 201a, and they are arranged one by one. Under the action of the first magnetic block 109c and the second magnetic block 201a, the slide plate 201 can be limited and fixed, which is convenient for the subsequent disassembly and assembly of the corrugated plate 200. Example 2

[0042] See also Figure 5 and Figure 6 In this embodiment, based on the first embodiment, the position of the docking seat 109 can be moved and adjusted under the elastic performance of the spring 108b, thereby realizing the disassembly, assembly and replacement of the first flat tube 1010 or the second flat tube 1011.

[0043] Specifically, mounting seats 108 are provided on the opposite end surfaces of the left plate 104 and the right plate 105, and telescopic tubes 108a are evenly installed at the front and rear ends of the inner wall of the mounting seat 108 from top to bottom, and springs 108b are provided between the upper and lower adjacent telescopic tubes 108a, and the other end of the telescopic tube 108a is fixedly installed on the inner wall of the docking seat 109; the two ends of the spring 108b are respectively fixed on the inner wall of the mounting seat 108 and the inner wall of the docking seat 109, and the inner side walls of the docking sleeve 106a and the docking groove 109a are bonded with sealing rings.

[0044] When the above arrangement is in use, after the limiting action of the outer bottom of the docking seat 109 disappears, force is applied to the first flat tube 1010 to be removed to make it move outward. The first flat tube 1010 is forced to move outward and push the docking groove 109a on the docking seat 109, so that the docking seat 109 moves outward and squeezes the telescopic tube 108a and the spring 108b. At this time, the inner end of the first flat tube 1010 can be removed from the docking sleeve 106a on the outer wall of the middle partition 106, and then the outer end of the first flat tube 1010 can be removed from the docking groove on the docking seat 109. The first flat tube 1010 can be removed by removing it from the docking slot 109a to complete the disassembly of the first flat tube 1010. The same is true for installation. First, the outer end of the first flat tube 1010 is inserted into the corresponding docking slot 109a, and the docking seat 109 is pushed to move outward. After moving a certain distance, the inner end of the first flat tube 1010 is inserted into the corresponding docking sleeve 106a, and then the force on the first flat tube 1010 is stopped. At this time, the docking seat 109 can be bounced back to the inside under the elastic performance of the spring 108b to complete the installation of the first flat tube 1010. Repeat the above operation when disassembling and assembling the second flat tube 1011.

[0045] Furthermore, the telescopic tube 108a is sealed at both ends and the telescopic position to achieve the circulation of carbon dioxide refrigerant or PTC side liquid. The elastic performance of the spring 108b can drive the docking seat 109 to move along the surface of the base 100 to facilitate the subsequent disassembly and assembly of the first flat tube 1010 and the second flat tube 1011. The sealing ring can play a sealing role at the connection between the first flat tube 1010 and the second flat tube 1011 to improve the sealing performance. Among them, the sealing ring at the inlet end of the carbon dioxide refrigerant adopts a low-temperature resistant sealing ring, and the sealing ring at the outlet end of the carbon dioxide refrigerant (that is, after the carbon dioxide refrigerant undergoes heat exchange, its temperature rises) adopts a high-temperature resistant sealing ring. At the same time, due to the PTC liquid The body heating battery requires a certain amount of heat, so the sealing ring at the liquid inlet end of the PTC side adopts a high-temperature resistant sealing ring, and the sealing ring at the liquid outlet end of the PTC side (that is, the temperature of the PTC liquid decreases after heat exchange) adopts a low-temperature resistant sealing ring, thereby ensuring that the sealing performance of the connection with the flat tube is not affected by temperature changes, and the sealing ring can preferably withstand a pressure of 34MPa. For details, please refer to the existing document "Publication No. CN113698719A A new type of 35Mpa high-pressure hydrogen fluororubber sealing ring material" and the existing document "Publication No. 116751414B-A high-temperature resistant rubber sealing ring and its preparation method". This is the existing technology, so I will not go into details here. Example 3

[0046] See also Figure 4 and Fig.12Based on Example 2, this embodiment makes the first rocker 302 rotate around the first rotation axis 303 as the center under the elastic performance of the torsion spring 304, and then synchronously drives the second rocker 306 to rotate around the second rotation axis 307 as the center under the action of the multi-angle connecting rod 305, thereby achieving or eliminating the limiting effect on the inner docking seat 109.

[0047] Specifically, a limit assembly 300 is arranged inside the T-slot 101, and the limit assembly 300 includes a pressing block 301 and a first rocker 302 fixedly connected to the bottom of the outer wall on one side thereof, and the front and rear ends of the bottom of the first rocker 302 are connected to the outer wall of the first rotating shaft 303 through a connecting block; a torsion spring 304 is sleeved on the outer side of the outer wall of the first rotating shaft 303, and the edges of one side of the end faces of the front and rear ends of the first rocker 302 are rotatably connected to a multi-angle connecting rod 305; the other end of the multi-angle connecting rod 305 is rotatably connected to the center position of the inner wall of the corresponding second rocker 306, and a second rotating shaft 307 is installed at the center position of the lower surface of the second rocker 306; wherein, the front and rear ends of the first rotating shaft 303 are respectively rotatably connected to the bearings on the inner walls on both sides of the T-slot 101, and the two ends of the second rotating shaft 307 are respectively rotatably connected to the bearings on the inner walls on both sides of the T-slot 101.

[0048] When the above arrangement is in use, when it is necessary to maintain and overhaul the first flat tube 1010 or the second flat tube 1011 inside the water chamber housing 102, the outer water chamber housing 102 is first removed, and then the pressing block 301 is pressed downward. The pressing block 301 is forced to move toward the inside of the T-slot 101, and drives the outer end of the first rocker 302 to rotate around the first rotating shaft 303 as the center of the circle, and squeezes the torsion spring 304. The outer end of the first rocker 302 rotates downward so that its inner end rotates upward, and under the action of the multi-angle connecting rods 305 at the front and rear ends, the second rocker 306 at the front and rear ends is pushed to rotate around the second rotating shaft 307 as the center of the circle, so that the portion of the second rocker 306 protruding from the top of the T-slot 101 is retracted into the T-slot 1 01 interior, and cancel the limiting effect on the bottom of the inner docking seat 109, and then the first flat tube 1010 or the second flat tube 1011 can be disassembled and replaced. After the first flat tube 1010 or the second flat tube 1011 is installed, stop applying force to the pressure block 301. At this time, the first rocker 302 is rebounded to the initial position under the elastic performance of the torsion spring 304, and the second rocker 306 is rotated back to the initial state under the action of the multi-angle connecting rod 305, and the outer end of the second rocker 306 is tilted to block the outside of the docking seat 109, which plays a limiting role and completes the limiting installation, thereby facilitating the staff to quickly disassemble and replace the first flat tube 1010 and the second flat tube 1011, saving time and effort, and high work efficiency.

[0049] Furthermore, when the first rocker 302 is subjected to external force, it will rotate to adjust the angle around the first rotating shaft 303 as the center, and will squeeze the torsion spring 304. When the external force disappears, the elastic property of the torsion spring 304 will bounce the first rocker 302 back to its initial state. The inner sides of the front and rear end surfaces of the first rocker 302 are connected to the corresponding second rocker 306 through the multi-angle connecting rod 305. Therefore, when the first rocker 302 rotates, the second rocker 306 will be driven to rotate synchronously around the second rotating shaft 307 as the center under the action of the multi-angle connecting rod 305, which is convenient for adjustment operation. Example 4

[0050] See also Figure 3 , Figure 8 and Fig. 9 Based on Example 1, this embodiment designs the positions of the left plate 104, the right plate 105, the baffle 107 and the middle partition 106 so that the battery pack liquid can exchange heat with the carbon dioxide refrigerant and the PTC side liquid, thereby realizing both cooling and heating functions of the battery.

[0051] Specifically, docking sleeves 106a are fixedly connected between the upper and lower adjacent overflow holes 106b, U-shaped through grooves 106c are evenly spaced from top to bottom on both sides of the inner part of the middle partition 106, and baffles 107 are sealed and installed in the middle between the middle partition 106 and the left plate 104 and the right plate 105; the interior of the first flat tube 1010 is evenly spaced from front to back with oblong inner holes, and the interior of the second flat tube 1011 is evenly spaced from front to back with square inner holes; wherein, the first flat tube 1010 and the second flat tube 1011 are both 2 mm thick, and the outer diameter is designed to be 30 mm. The first flat tube 1010 has more inner holes, which ensures that the strength meets the performance requirements of 17MPa and 34MPa for bursting of carbon dioxide refrigerant side while increasing its heat exchange capacity.

[0052] When the above arrangement is in use, the water chamber shell 102 is divided into four spaces through the position design of the left plate 104, the right plate 105, the baffle 107 and the middle partition 106, wherein the left plate 104 separates the imported carbon dioxide refrigerant and the exported carbon dioxide refrigerant, the right plate 105 separates the PTC imported liquid and the PTC exported liquid, the middle partition 106 separates the PTC side liquid and the carbon dioxide refrigerant, and at the same time connects the battery pack side liquid, so that the battery pack liquid can exchange heat with the carbon dioxide refrigerant and the PTC side liquid. The front and rear two spaces on the left side are the carbon dioxide refrigerant circulation cooling part, and the front and rear two spaces on the right side are the PTC side liquid circulation heating part, so that the cooling and heating functions of the battery can be realized, and the heating and cooling devices do not need to be installed separately, thereby meeting people's needs.

[0053] Furthermore, the middle partition 106 divides the interior of the water chamber shell 102 into two left and right parts, and the baffle 107 divides the left and right parts into four front and rear parts. The space on the left side of the middle partition 106 is a cooling space, and the space on the right side is a heating space, realizing the integration of cooling and heating. U-shaped through grooves 106c are provided on both sides of the middle partition 106, which can realize the U-shaped flow of the carbon dioxide refrigerant on both sides and the liquid on the PTC side, so as to achieve the purpose of cooling and heating. Through the design of the first flat tube 1010 and the second flat tube 1011, the pressure resistance requirements of the carbon dioxide battery thermal management system for the heat exchanger can be met.

[0054] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A carbon dioxide cooling and heating integrated heat exchanger, comprising a base (100) and a water chamber shell (102) installed in the middle of the upper surface thereof, wherein T-shaped grooves (101) are provided at both ends of the upper surface of the base (100), a left plate (104) and a right plate (105) are installed at both sides of the interior of the water chamber shell (102), and a middle partition plate (106) is sealed and installed at the center of the interior of the water chamber shell (102), characterized in that: First flat tubes (1010) are evenly spaced apart at the front and rear ends of the left side between the left plate (104) and the middle partition (106) from top to bottom, second flat tubes (1011) are evenly spaced apart at the front and rear ends of the right side between the right plate (105) and the middle partition (106) from top to bottom, corrugated plates (200) are arranged between the upper and lower adjacent first flat tubes (1010) and the upper and lower adjacent second flat tubes (1011), a slide plate (201) is fixedly connected to the outer wall of one side of the corrugated plate (200), a second magnetic block (201a) is embedded in the center of the rear end face of the slide plate (201), the upper surface of the slide plate (201) is evenly spaced apart with alternating square grooves (202) from front to back, and the lower surface of the slide plate (201) is evenly spaced apart with single square grooves (203); The alternating square grooves (202) and the single square grooves (203) below are arranged alternately front and back, and a through hole is provided between the alternating square grooves (202) and the adjacent single square grooves (203); U-shaped through grooves (106c) are evenly spaced from top to bottom on both sides of the interior of the middle partition (106), and baffles (107) are sealed and installed in the middle between the middle partition (106) and the left plate (104) and the right plate (105); Mounting seats (108) are provided on the opposite end surfaces of the left plate (104) and the right plate (105); telescopic tubes (108a) are evenly spaced from top to bottom on the front and rear ends of the inner wall of the mounting seat (108); springs (108b) are provided between the upper and lower adjacent telescopic tubes (108a); and the other end of the telescopic tube (108a) is fixedly mounted on the inner wall of the docking seat (109); Slide grooves (109b) are evenly spaced from top to bottom at the front and rear ends of the outer side wall of the docking seat (109), a docking groove (109a) is provided between the upper and lower adjacent slide grooves (109b), a first magnetic block (109c) is embedded in the center of the inner wall of the slide groove (109b), and the first magnetic block (109c) and the second magnetic block (201a) are arranged correspondingly; Wherein, a docking sleeve (106a) is correspondingly arranged on the outer side of the front and rear end openings of the U-shaped through groove (106c), a through opening is opened on one side of the bottom of the baffle plate (107), two ends of the spring (108b) are respectively fixed to the inner wall of the mounting seat (108) and the inner wall of the docking seat (109), and the inner side walls of the docking sleeve (106a) and the docking groove (109a) are both bonded with sealing rings.

2. The carbon dioxide cooling and heating integrated heat exchanger according to claim 1, characterized in that: A battery pack side liquid inlet pipe (102a) and a battery pack side liquid outlet pipe (102b) are respectively provided on one side above the front and rear end surfaces of the water chamber shell (102), and a carbon dioxide refrigerant inlet and outlet pressure plate (103) is installed at the edge of one side of the upper surface of the water chamber shell (102).

3. The carbon dioxide cooling and heating integrated heat exchanger according to claim 2, characterized in that: A carbon dioxide refrigerant inlet (103a) and a carbon dioxide refrigerant outlet (103b) are respectively provided at the front and rear ends of the upper surface of the carbon dioxide refrigerant inlet and outlet pressure plate (103), a PTC side liquid inlet pipe (105a) and a PTC side liquid outlet pipe (105b) are respectively provided at the front and rear ends of the top of the right side plate (105), and overflow holes (106b) are provided at the front and rear ends inside the middle partition plate (106) from top to bottom.

4. The carbon dioxide cooling and heating integrated heat exchanger according to claim 3 is characterized in that: A butt sleeve (106a) is fixedly connected between the upper and lower adjacent overflow holes (106b).

5. The carbon dioxide cooling and heating integrated heat exchanger according to claim 4, characterized in that: The first flat tube (1010) has oblong inner holes evenly spaced from front to back, and the second flat tube (1011) has square inner holes evenly spaced from front to back; The first flat tube (1010) and the second flat tube (1011) are both 2 mm thick and have an outer diameter of 30 mm.

6. The carbon dioxide cooling and heating integrated heat exchanger according to claim 1, characterized in that: A limit assembly (300) is arranged inside the T-shaped slot (101), the limit assembly (300) comprising a pressing block (301) and a first seesaw (302) fixedly connected to the bottom of an outer wall on one side thereof, the front and rear ends of the bottom of the first seesaw (302) being connected to the outer wall of a first rotating shaft (303) via a connecting block.

7. The carbon dioxide cooling and heating integrated heat exchanger according to claim 6, characterized in that: A torsion spring (304) is sleeved on the outer side of the outer wall of the first rotating shaft (303), and the edges of one side of the end surfaces at both the front and rear ends of the first rocker (302) are rotatably connected to multi-angle connecting rods (305).

8. The carbon dioxide cooling and heating integrated heat exchanger according to claim 7, characterized in that: The other end of the multi-angle connecting rod (305) is rotatably connected to the center position of the inner wall of the corresponding second rocker plate (306), and a second rotating shaft (307) is installed at the center position of the lower surface of the second rocker plate (306); The front and rear ends of the first rotating shaft (303) are respectively rotatably connected to the bearings on the inner walls on both sides of the T-shaped slot (101), and the two ends of the second rotating shaft (307) are respectively rotatably connected to the bearings on the inner walls on both sides of the T-shaped slot (101).

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