Heat exchange device

Abstract

The application discloses a heat exchange device, which comprises a mounting plate, a throttling unit, a second heat exchange unit and a first heat exchange unit, the second heat exchange unit is provided with a first fluid channel and a second fluid channel, the throttling unit comprises a connecting body, the connecting body is provided with a first connecting channel, and the throttling unit is provided with a valve port; a part of the connecting body is located in a second hole channel and is sealingly fixed with a blocking plate, so that the first connecting channel is not directly communicated with the second hole channel; when the valve port is opened, the valve port communicates the second hole channel with the first connecting channel; the first heat exchange unit is provided with a first channel and a second channel; the mounting plate is provided with a second connecting channel and a third connecting channel, the second connecting channel communicates a sixth hole channel with the first connecting channel, and the third connecting channel communicates a first hole channel with a seventh hole channel. The heat exchange device has a relatively compact structure, occupies a small space and is convenient to install.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and more specifically to heat exchange devices. Background Technology

[0002] A thermal management system includes a first heat exchanger, a second heat exchanger, and an expansion valve. Refrigerant exits from the first flow channel of the first heat exchanger, passes through the expansion valve and the second heat exchanger, and then flows back to the second flow channel of the first heat exchanger. The first heat exchanger, second heat exchanger, and expansion valve are located in different places and are connected by pipelines. This not only results in complex pipeline connections and inconvenient installation but also occupies a significant amount of space. Summary of the Invention

[0003] The purpose of this application is to provide a heat exchange device that facilitates the miniaturization of the heat exchange device structure.

[0004] The provided heat exchange device includes a mounting plate, a throttling unit, and a second heat exchange unit, wherein the throttling unit is fixed to the second heat exchange unit. The device is characterized by further including a first heat exchange unit, wherein the first heat exchange unit and the second heat exchange unit are fixed to the mounting plate, and the first heat exchange unit and the second heat exchange unit are located on the same side of the mounting plate.

[0005] The second heat exchange unit has a first fluid channel and a second fluid channel that are isolated from each other. The first fluid channel includes a first channel and a second channel, and a baffle plate. The heat exchange device also includes a connector and a baffle plate. The connector has a first connecting channel, one end of which is connected to one end of the valve port of the throttling unit. A portion of the connector is located in the second channel and is sealed and fixed to the baffle plate, so that the first connecting channel and the second channel are not directly connected. When the valve port is opened, the valve port of the throttling unit connects the second channel and the first connecting channel.

[0006] The first heat exchange unit has a first channel and a second channel that are isolated from each other. The first channel includes a sixth channel and the second channel includes a seventh channel.

[0007] The mounting plate has a second connection channel and a third connection channel, the second connection channel connecting the sixth channel and the first connection channel, and the third connection channel connecting the first channel and the seventh channel.

[0008] The provided heat exchange device has a first heat exchange unit and a second heat exchange unit located on the same side of a mounting plate. The mounting plate has a second connection channel and a third connection channel. The second connection channel connects the sixth channel and the first connection channel, and the third connection channel connects the first channel and the seventh channel. When the valve of the throttling unit is open, the second connection channel connects the first channel of the first heat exchange unit and the first fluid channel of the second heat exchange unit, and the third connection channel connects the second channel of the first heat exchange unit and the first fluid channel of the second heat exchange unit. This heat exchange device has a relatively compact structure, occupies less space, and is easy to install. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of one embodiment of a heat exchange device;

[0010] Figure 2 yes Figure 1 A cross-sectional view of the heat exchange device at the first interface.

[0011] Figure 3 yes Figure 1 A cross-sectional view of the heat exchange device at the second interface.

[0012] Figure 4 yes Figure 1 The diagram shows the fluid flow in the heat exchange device on the plate layer, where solid lines represent visible fluid flow paths and dashed lines represent invisible fluid flow paths.

[0013] Figure 5 yes Figure 2 A magnified view of a portion of the image;

[0014] Figure 6 This is a cross-sectional schematic diagram of another embodiment of the heat exchange device at the first interface.

[0015] Figure 7 This is a cross-sectional schematic diagram of another embodiment of the heat exchange device at the first interface. Detailed Implementation

[0016] The specific implementation method will be described below with reference to the accompanying drawings.

[0017] The heat exchange device includes a mounting plate, a first heat exchange unit 1100, a second heat exchange unit 1200, and a throttling unit 1300. The first heat exchange unit 1100 and the second heat exchange unit 1200 are fixed to the mounting plate, and the first and second heat exchange units can be arranged side by side. The heat exchange device has a first interface 1001, a second interface 1002, a third interface 1003, and a fourth interface 1004, wherein the first interface 1001 and the second interface 1002 are located in the first heat exchange unit 1100, and the third interface 1003 and the fourth interface 1004 are located in the second heat exchange unit 1200.

[0018] The first heat exchange unit 1100 includes a plurality of stacked plates, which can be fixed by welding. The first heat exchange unit 1100 forms a first channel and a second channel that are isolated from each other. The fluid flowing through the first channel and the fluid flowing through the second channel exchange heat within the first heat exchange unit. The first interface 1001 is connected to the first channel, and the second interface 1002 is connected to the second channel.

[0019] The second heat exchange unit 1200 also includes several stacked plates, which can be fixed by welding. The second heat exchange unit 1200 forms a first fluid channel and a second fluid channel that are isolated from each other. The fluid flowing through the first fluid channel and the fluid flowing through the second fluid channel exchange heat within the second heat exchange unit 1200. The third interface 1003 and the fourth interface 1004 are connected to the second fluid channel.

[0020] In the first heat exchange unit 1100, adjacent plates are stacked to form a first inter-plate channel or a second inter-plate channel. One side of a plate is the first inter-plate channel, and the other side is the second inter-plate channel. For ease of description, one of two adjacent plates is defined as the first plate, and the other as the second plate. If the first plate and one of the two adjacent second plates form the first inter-plate channel, and the first plate and the second plate form the second inter-plate channel, the first and second inter-plate channels are not connected. The fluid in the first inter-plate channel and the fluid in the second inter-plate channel can exchange heat. The first and second inter-plate channels of the second heat exchange unit 1200 are similar to those of the first heat exchange unit 1100, and will not be described again here. It should be noted that the non-connection of the first and second inter-plate channels refers to their internal connection within the heat exchange unit 1100. However, once the heat exchange device 1000 becomes part of the thermal management system, they may be connected.

[0021] In this embodiment, the first fluid channel of the second heat exchange unit 1200 is a refrigerant channel, and the second fluid channel is a coolant channel. The first fluid channel includes a first channel 1210, a second channel 1240, and a plurality of first inter-plate channels, and the second fluid channel includes a third channel 1220, a fourth channel 1230, and a plurality of second inter-plate channels.

[0022] like Figure 2 and Figure 5 As shown, the throttling unit 1300 includes a valve body 1310 and a valve core assembly. The valve body 1310 is fixed to the second heat exchange unit 1200 by welding, screw connection, or other methods. The valve body 1310 has a receiving cavity 1330 with openings at both ends. In this embodiment, the receiving cavity 1330 includes a first opening facing the second heat exchange unit and a second opening facing away from the second heat exchange unit. A portion of the valve core assembly extends into the receiving cavity 1330 through the second opening, and the valve core assembly is sealed and fixed to the valve body 1310. It should be noted that the valve body can be an integral structure with the mounting plate.

[0023] The valve core assembly includes a valve core 1320 and a valve seat 1350, the valve seat 1350 having a valve port 1351. In this embodiment, the valve core is a valve needle, which can move relative to the valve seat 1350, thereby adjusting the opening degree of the valve port 1351.

[0024] The throttling unit 1300 also has a connector, which includes a pipe body 1500, a fixing part 1360, and a connecting part 1340. The fixing part 1360 and the connecting part 1340 abut against each other. Of course, the fixing part 1360 and the connecting part 1340 can also be an integral structure, or the fixing part 1360 and the connecting part 1340 can be fixedly connected. It should be noted that the connector may also not be part of the throttling unit, for example, it can be set separately.

[0025] At least a portion of the connector extends into the receiving cavity 1330 through the first opening, and the fixing portion 1360 of the connector is sealed and fixed to the wall of the receiving cavity 1330.

[0026] In this embodiment, the fixing part 1360 and the connecting part 1340 are separately provided. Specifically, the wall portion corresponding to the receiving cavity 1330 has a first stepped surface 1313, and the connecting part 1340 includes a first mating part 13402 and a second mating part 13403. The second mating part 13403 protrudes from the first mating part 13402 in the direction toward the second heat exchange unit 1200. The upper end surface of the first mating part 13402 is fixed, abuts, or contacts the first stepped surface 1313. The lower end surface of the first mating part 13402 is fixed or abuts the fixing part 1360, and the fixing part is fixed or abuts the second heat exchange unit 1200. The first mating part 13402 also has at least one through hole 13401 that penetrates the first mating part 13402, so that the spaces on both sides of the first mating part 13402 are connected.

[0027] The second mating part 13403 has a first receiving part 13441 and a second receiving part 13442, with the second receiving part 13442 being closer to the second heat exchange unit 1200 than the first receiving part 13441. A portion of the valve seat 1350 extends into the first receiving part 13441, and the outer wall surface of the valve seat 1350 is sealed to the inner wall surface of the first receiving part 13441, specifically, a sealing ring can be used for sealing.

[0028] A portion of the tube body 1500 is located in the second receiving portion 13442. The outer wall surface of the tube body 1500 is sealed and fixed to the inner wall surface of the second receiving portion 13442. Specifically, the sealing and fixing can be achieved by riveting, welding, or other methods. In this embodiment, the inner diameter of the second receiving portion 13442 is smaller than the inner diameter of the first receiving portion 13441. The tube body 1500 has a large-diameter portion, the outer diameter of which is smaller than the inner diameter of the first receiving portion 13441 and larger than the inner diameter of the second receiving portion 13442, so that the large-diameter portion of the tube body 1500 extends into and is accommodated within the connecting portion 1340.

[0029] A portion of the tube body 1500 is located within the second channel 1240, and another portion of the tube body 1500 is sealed and fixed to the baffle plate 1201 of the second heat exchange unit. This prevents the first connecting channel 1501 within the tube body 1500 from directly communicating with the second channel 1240. When the valve core 1320 opens the valve port 1351, the first connecting channel 1501 can communicate with the second channel 1240 through the valve port 1351 and the valve cavity 1311. This allows the inlet and outlet of the throttling unit to correspond to a channel portion of the second heat exchange unit.

[0030] At least a portion of the fixing part 1360 is located within the receiving cavity 1330. The outer wall surface of the fixing part 1360 is sealed and fixed to the corresponding inner wall surface of the receiving cavity 1330, specifically by means of screwing, riveting, transition fit, welding, etc. In this embodiment, the fixing part 1360 is fixed to the corresponding inner wall surface of the receiving cavity 1330 by welding. This fixing method can fix the heat exchange unit, valve body, fixing part, connecting part, pipe body, etc. together by brazing.

[0031] It should be noted here that the baffle plate 1201 of the second heat exchange unit is fixed to the first mounting plate 1600. The baffle plate here can be any plate or plate-like body located on the end side of the heat exchange unit, such as the middle plate, end plate, bottom plate, or mounting plate of the heat exchange unit. It can be varied according to actual needs. Any part that can be fixed to the first mounting plate can be called the baffle plate 1201.

[0032] In this embodiment, the first channel and the second channel of the first heat exchange unit 1100 can both be mutually isolated refrigerant channels. The first channel includes a fifth channel 1101, a sixth channel 1102, and a plurality of first inter-plate channels. The second channel includes a seventh channel 1103, an eighth channel 1104, and a plurality of second inter-plate channels. The first interface 1001 is connected to the fifth channel 1101, and the second interface 1002 is connected to the eighth channel 1104. The fifth channel 1101, the sixth channel 1102, the second channel 1240, and the fourth channel 1230 are located on the same side of the heat exchange device, while the seventh channel 1103, the eighth channel 1104, the first channel 1210, and the third channel 1220 are located on the opposite side of the heat exchange device.

[0033] In this embodiment, the first inter-plate channel of the first heat exchange unit 1100 is provided with a first blocking part 1111, which is located between the fifth channel 1101 and the sixth channel 1102, allowing the fifth channel 1101 and the sixth channel 1102 to communicate through the inter-plate channel. Similarly, the second inter-plate channel of the first heat exchange unit 1100 is provided with a second blocking part 1112, which is located between the seventh channel 1103 and the eighth channel 1104, allowing the seventh channel 1103 and the eighth channel 1104 to communicate through the inter-plate channel. It should be noted that the first blocking part 1111 and the second blocking part 1112 can be integral with the plates of the second heat exchange unit or can be separate structures.

[0034] like Figure 2As shown, the mounting plate includes a first mounting plate 1600 and a second mounting plate 1700. A first heat exchange unit and a second heat exchange unit are fixed to the first mounting plate. The mounting plate has a second connecting channel that connects the fifth channel 1102 and the first connecting channel 1501. In this embodiment, the second connecting channel includes a first through channel 1601, a first groove 1602, and a second through channel 1603. The first through channel 1601, the first groove 1602, and the second through channel 1603 are located on the first mounting plate 1600. The first through channel 1601 and the second through channel 1603 penetrate the first mounting plate 1600. One end of the first through channel 1601 is connected to the sixth channel 1102, and the other end is closed by the second mounting plate 1700. One end of the second through channel 1603 is connected to the first connecting channel 1501, and the other end is closed by the second mounting plate 1700. The open end of the first groove 1602 is also closed by the second mounting plate 1700. In this embodiment, the second connecting channel, the fifth channel 1101, the sixth channel 1102, the second channel 1240, and the fourth channel 1230 can be located on the same side of the heat exchange device. It should be noted that while the second connecting channel, the sixth channel 1102, and the second channel 1240 can be located on the same side of the heat exchange device, the positions of the fifth channel 1101 and the fourth channel 1230 can be adjusted as needed. This arrangement simplifies the design of the second connecting channel and facilitates its fabrication.

[0035] like Figure 3 As shown, the mounting plate also has a third connecting channel connecting the first channel 1210 and the seventh channel. In this embodiment, the third connecting channel includes a third through channel 1604, a second groove 1605, and a fourth through channel 1606. The third through channel 1604, the second groove 1605, and the fourth through channel 1606 are located on the first mounting plate 1600, and the third through channel 1604 and the fourth through channel 1606 penetrate the first mounting plate 1600. One end of the third through channel 1604 is connected to the first channel 1210, and the other end is closed by the second mounting plate 1700. One end of the fourth through channel 1606 is connected to the seventh channel 1103, and the other end is closed by the second mounting plate 1700. The open end of the second groove 1605 is also closed by the second mounting plate 1700. In this embodiment, the third connecting channel, the seventh channel 1103, the eighth channel 1104, the first channel 1210, and the third channel 1220 can be located on the same side of the heat exchange device. It should be noted that the third connecting channel, the seventh channel 1103, and the first channel 1210 can be located on the same side of the heat exchange device, while the eighth channel 1104 and the third channel 1220 can be adjusted as needed. This arrangement simplifies the design of the second connecting channel and facilitates manufacturing. It should also be pointed out that the first and second grooves can also be located on the second mounting plate.

[0036] like Figures 1 to 4 As shown, the specific operation of the heat exchange device is as follows: When valve core 1320 opens valve port 1351, refrigerant can flow from first interface 1001 into the first channel of the first heat exchange unit 1100, pass through the fifth orifice 1101 and the sixth orifice 1102 of the first channel, then through the second connecting channel, and then into the second connecting channel. After passing through valve port 1351 and valve cavity 1311, it flows into the first fluid channel of the second heat exchange unit 1200, passes through the second orifice 1240 and the first orifice 1210, then through the third connecting channel, and then into the second channel of the first heat exchange unit 1100. After passing through the seventh orifice 1103 and the eighth orifice 1104 of the second channel, it flows out of the heat exchange device through the second interface 1102. It should be noted that the refrigerant flowing in from the first interface 1001 and the refrigerant flowing out from the second heat exchange unit exchange heat in the first heat exchange unit, while the refrigerant flowing out from the throttling unit exchanges heat with the coolant in the second heat exchange unit. In this type of heat exchange device, the connecting pipes between the first heat exchange unit and the second heat exchange unit can be omitted, which facilitates the installation and layout in the system.

[0037] Figure 6 Another embodiment is shown, in which the first heat exchange unit 1100 and the second heat exchange unit 1200 are located on one side of the mounting plate, and the throttling unit 1300 is located on the other side of the mounting plate. The valve body 1310 of the throttling unit 1300 is fixedly mounted to the second mounting plate 1700, and the first heat exchange unit 1100 and the second heat exchange unit 1200 are fixedly mounted to the first mounting plate 1600.

[0038] like Figure 6 As shown, the first mounting plate 1600 includes a first through channel 1601, a first groove 1602, and a second through channel 1603, with the first through channel 1601 communicating with the first groove 1602. The second mounting plate 1700 includes a fifth through channel 1701 and a sixth through channel 1702. One end of the first through channel 1601 communicates with the sixth hole 1102, and the other end is closed by the second mounting plate 1700. One end of the second through channel 1603 communicates with the second hole 1240, and the other end communicates with the fifth through channel 1701. A portion of the opening end of the first groove 1602 is closed by the second mounting plate 1700, and the other portion communicates with the sixth through channel 1702, thus connecting the sixth through channel 1702 with the first groove 1602.

[0039] The valve body 1310 of the throttling unit 1300 has a first connecting channel 1312 and a second connecting channel 1314, wherein the first connecting channel 1312 connects the valve cavity 1311 and the sixth through channel 1702, and the second connecting channel 1314 connects the fifth through channel 1701.

[0040] The second connection channel of the mounting plate connects the first connection channel 1312 and the sixth channel 1102. The second connection channel includes a first through channel 1601, a first groove 1602 and a sixth through channel 1702. The mounting plate also has a fourth connection channel, which connects the second connection channel 1314 and the second channel 1240.

[0041] Unlike the above embodiments, in this embodiment, no connecting body is provided. The valve seat 1350 of the valve core assembly is sealed to the wall corresponding to the second connecting channel 1314, and the valve port 1351 can connect the second connecting channel 1314 and the valve cavity 1311. It should be noted that the valve body can be an integral structure with the mounting plate.

[0042] The specific operation of the heat exchange device in this embodiment is as follows: When the valve core 1320 opens the valve port 1351, the refrigerant can flow from the first interface 1001 into the first channel of the first heat exchange unit 1100, then into the second connecting channel after passing through the fifth orifice 1101 and the sixth orifice 1102 of the first channel, then into the throttling unit 1300 after passing through the sixth through-channel 1702 of the second connecting channel, then into the throttling unit 1300 after passing through the first connecting channel 1312, the valve chamber 1311, the valve port 1351, the second connecting channel 1314, the fifth through-pipe 1701, the second through-channel 1603, and then into the first fluid channel of the second heat exchange unit 1200. After passing through the second orifice 1240 and the first orifice 1210, it flows into the second channel of the first heat exchange unit 1100 after passing through the third connecting channel, and then flows out of the heat exchange device through the second interface 1102 after passing through the seventh orifice 1103 and the eighth orifice 1104 of the second channel. It should be noted that the refrigerant flowing in from the first interface 1001 and the refrigerant flowing out from the second heat exchange unit exchange heat in the first heat exchange unit, while the refrigerant flowing out from the throttling unit exchanges heat with the coolant in the second heat exchange unit. In this heat exchange device, the connecting pipes between the first and second heat exchange units can be omitted, which facilitates installation and layout in the system.

[0043] Figure 7 Another embodiment is shown, in which the first heat exchange unit 1100, the second heat exchange unit 1200 and the throttling unit 1300 are located on the same side of the mounting plate, the valve body 1310 of the throttling unit 1300 is fixedly mounted to the first mounting plate 1600, and the first heat exchange unit 1100 and the second heat exchange unit 1200 are also fixedly mounted to the first mounting plate 1600.

[0044] like Figure 7As shown, the first mounting plate 1600 includes a first through channel 1601, a first groove 1602, a seventh through channel 1604, an eighth through channel 1605, a third groove 1606, and a second through channel 1603. The first through channel 1601 is connected to the first groove 1602, the seventh through channel 1604 is connected to the first groove 1602, the eighth through channel 1605 is connected to the third groove 1606, and the second through channel 1603 is connected to the third groove 1606.

[0045] One end of the first through channel 1601 is connected to the sixth channel 1102, and the other end is closed by the second mounting plate 1700. One end of the second through channel 1603 is connected to the second channel 1240, and the other end is closed by the second mounting plate 1700. One end of the seventh through channel 1604 is connected to the first connecting channel 1312, and the other end is closed by the second mounting plate 1700. One end of the eighth through channel 1605 is connected to the second connecting channel 1314, and the other end is closed by the second mounting plate 1700.

[0046] The valve body 1310 of the throttling unit 1300 has a first connecting channel 1312 and a second connecting channel 1314, wherein the first connecting channel 1312 connects the valve cavity 1311 and the seventh through channel 1604, and the second connecting channel 1314 connects the eighth through channel 1605.

[0047] The second connecting channel of the mounting plate connects the first connecting channel 1312 and the sixth channel 1102. The second connecting channel includes a first through channel 1601, a first groove 1602 and a seventh through channel 1604. The mounting plate also has a fourth connecting channel, which connects the second connecting channel 1314 and the second channel 1240. The fourth connecting channel includes an eighth through channel 1605, a third groove 1606 and a second through channel 1603.

[0048] Unlike the above embodiments, in this embodiment, no connecting body is provided. The valve seat 1350 of the valve core assembly is sealed to the wall corresponding to the second connecting channel 1314, and the valve port 1351 can connect the second connecting channel 1314 and the valve cavity 1311. It should be noted that the valve body can be an integral structure with the mounting plate.

[0049] The specific operation of the heat exchange device in this embodiment is as follows: When the valve core 1320 opens the valve port 1351, the refrigerant can flow from the first interface 1001 into the first channel of the first heat exchange unit 1100, then into the second connecting channel after passing through the fifth orifice 1101 and the sixth orifice 1102 of the first channel, then into the throttling unit 1300 after passing through the seventh through channel 1604 of the second connecting channel, then into the throttling unit 1300, then into the first fluid channel of the second heat exchange unit 1200 after passing through the first connecting channel 1312, the valve chamber 1311, the valve port 1351, the second connecting channel 1314, and the fourth connecting channel, then into the second fluid channel of the second heat exchange unit 1200, then into the second channel of the first heat exchange unit 1100 after passing through the second orifice 1240 and the first orifice 1210, and finally out of the heat exchange device through the second interface 1102 after passing through the seventh orifice 1103 and the eighth orifice 1104 of the second channel. It should be noted that the refrigerant flowing in from the first interface 1001 and the refrigerant flowing out from the second heat exchange unit exchange heat in the first heat exchange unit, while the refrigerant flowing out from the throttling unit exchanges heat with the coolant in the second heat exchange unit. In this heat exchange device, the connecting pipes between the first and second heat exchange units can be omitted, which facilitates installation and layout in the system.

[0050] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A heat exchange device comprising a mounting plate, a throttling unit, a second heat exchange unit, the throttling unit being fixed to the second heat exchange unit, characterized in that, It also includes a first heat exchange unit, and the first heat exchange unit and the second heat exchange unit are fixed to the mounting plate. The first heat exchange unit and the second heat exchange unit are located on the same side of the mounting plate. The second heat exchange unit has a first fluid channel and a second fluid channel that are isolated from each other. The first fluid channel includes a first channel and a second channel, and a baffle plate. The heat exchange device also includes a connector and a baffle plate. The connector has a first connecting channel, one end of which is connected to one end of the valve port of the throttling unit. A portion of the connector is located in the second channel and is sealed and fixed to the baffle plate, so that the first connecting channel and the second channel are not directly connected. When the valve port is opened, the valve port of the throttling unit connects the second channel and the first connecting channel. The first heat exchange unit has a first channel and a second channel that are isolated from each other. The first channel includes a sixth channel and the second channel includes a seventh channel. The mounting plate has a second connection channel and a third connection channel, the second connection channel connecting the sixth channel and the first connection channel, and the third connection channel connecting the first channel and the seventh channel.

2. The heat exchange device of claim 1, wherein The mounting plate includes a first mounting plate and a second mounting plate. The first heat exchange unit and the second heat exchange unit are fixed to the first mounting plate. The second connecting channel includes a first through channel, a first groove, and a second through channel. The first through channel, the first groove, and the second through channel are located on the first mounting plate. The first through channel and the second through channel pass through the first mounting plate. One end of the first through channel is connected to the sixth channel, and the other end is closed by the second mounting plate. One end of the second through channel is connected to the first connecting channel, and the other end is closed by the second mounting plate. The opening end of the first groove is also closed by the second mounting plate.

3. The heat exchange device of claim 2, wherein The third connecting channel includes a third through channel, a second groove, and a fourth through channel, wherein the third through channel, the second groove, and the fourth through channel are located on the first mounting plate, the third through channel and the fourth through channel pass through the first mounting plate, one end of the third through channel is connected to the first hole and the other end is closed by the second mounting plate, one end of the fourth through channel is connected to the seventh hole and the other end is closed by the second mounting plate, and the opening end of the second groove is also closed by the second mounting plate.

4. The heat exchange device of claim 3, wherein The second connecting channel, the sixth channel, and the second channel are located on one side of the heat exchange device, while the third connecting channel, the seventh channel, and the first channel are located on the opposite side of the heat exchange device.

5. The heat exchange device of claim 4, wherein The second connecting channel, the fifth channel, the sixth channel, the second channel and the fourth channel are located on the same side of the heat exchange device, and the third connecting channel, the seventh channel, the eighth channel, the first channel and the third channel are located on the same side of the heat exchange device.

6. The heat exchange device of claim 5, wherein The first heat exchange unit has an adjacent first inter-plate channel and a second inter-plate channel, which are isolated from each other. The first inter-plate channel of the first heat exchange unit is provided with a first blocking part, which is located between the fifth and sixth channels, so that the fifth and sixth channels can be connected through the first inter-plate channel. The second inter-plate channel is provided with a second blocking part, which is located between the seventh and eighth channels, so that the seventh and eighth channels can be connected through the second inter-plate channel.

7. Heat exchange device according to any of claims 1-6, characterized in that The throttling unit further includes a valve body and a valve core assembly. The valve body has a receiving cavity, and a portion of the connector and the valve core assembly extend into the receiving cavity. The connector includes a fixing portion and a connecting portion. A first stepped surface is formed on the wall of the receiving cavity. The connecting portion includes a first mating portion and a second mating portion. The second mating portion protrudes from the first mating portion in the direction toward the second heat exchange unit. The upper end face of the first mating portion is fixed, abuts, or contacts the first stepped surface. The lower end face of the first mating portion is fixed or abuts the fixing portion. The fixing portion is fixed or abuts the second heat exchange unit.

8. The heat exchange device of claim 7, wherein The outer wall of the fixing part and the inner wall of the receiving cavity are sealed and fixed by means of screwing, riveting, transition fitting, or welding. The first mating part also has at least one through hole that passes through the first mating part, so that the spaces on both sides of the first mating part are connected.

9. The heat exchange device of claim 8, wherein, The connector also has a tube body, and the second mating part has a first receiving part and a second receiving part formed therein. The second receiving part is close to the plate body relative to the first receiving part. A portion of the tube body is located in the second receiving part, and the outer wall surface of the tube body is sealed and fixed to the inner wall surface of the second receiving part.

10. The heat exchange device of claim 9, wherein, The inner diameter of the second receiving part is smaller than the inner diameter of the first receiving part. The tube body has a large diameter part, the outer diameter of which is smaller than the inner diameter of the first receiving part and larger than the inner diameter of the second receiving part. The outer wall surface of the tube body is welded and fixed to the inner wall surface of the second receiving part.

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