Plate heat exchanger and vehicle

Abstract

The utility model provides a plate heat exchanger and a vehicle. The plate heat exchanger comprises a mounting plate, a heating module and a cooling module. The heating module is fixed on the mounting plate, and the heating module is provided with a first cooling liquid flow channel, a first heat exchange pipeline and a second heat exchange pipeline; the cooling module is fixed to the mounting plate, the cooling module is provided with a second cooling liquid flow channel and a refrigerant flow channel, and the second cooling liquid flow channel communicates with the first cooling liquid flow channel; wherein the first heat exchange pipeline is used for connecting high-temperature cooling water, and the second heat exchange pipeline is used for connecting high-temperature oil. The plate heat exchanger simultaneously has heating and refrigerating functions and does not need to be matched with an additional plate heat exchanger for use, so that the arrangement of pipelines in a system is reduced, the cost is effectively reduced, and the plate heat exchanger is convenient to assemble and overhaul. Meanwhile, waste heat of high-temperature cooling water and high-temperature oil liquid in the vehicle can be recycled through the plate heat exchanger, multi-stage recycling of energy of the whole vehicle is achieved, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange equipment, and more specifically, to a plate heat exchanger and a vehicle. Background Art

[0002] A plate heat exchanger is usually provided in new energy construction machinery for heat management of the new energy construction machinery. For example, heat exchange between the battery liquid and other heat management circuits can be achieved through the plate heat exchanger.

[0003] However, a single plate heat exchanger usually can only achieve a single function. If multiple functions are to be achieved, multiple different plate heat exchangers need to be configured. As a result, the pipeline layout in the new energy construction machinery is complex and the manufacturing cost is relatively high. Summary of the Utility Model

[0004] To solve the above problems, the present application provides a plate heat exchanger and a vehicle, aiming to solve the problems of complex pipeline layout and high manufacturing cost caused by using multiple different plate heat exchangers.

[0005] In a first aspect, the present application provides a plate heat exchanger, including a mounting plate, a heating module, and a cooling module; the heating module is fixed to the mounting plate, and the heating module is provided with a first coolant flow channel, a first heat exchange pipeline, and a second heat exchange pipeline; the cooling module is fixed to the mounting plate, and the cooling module is provided with a second coolant flow channel and a refrigerant flow channel, and the second coolant flow channel is communicated with the first coolant flow channel; wherein, the first heat exchange pipeline is used for connecting high-temperature cooling water, and the second heat exchange pipeline is used for connecting high-temperature oil.

[0006] Based on the plate heat exchanger provided by the embodiments of the present application, which has heating and cooling functions. When it is necessary to heat the power battery, heat exchange is carried out with the coolant in the first coolant flow channel through the first heat exchange pipeline and / or the second heat exchange pipeline to increase the temperature of the coolant in the first coolant flow channel. The heated coolant will then flow back to the power battery pack to achieve heating of the power battery, thereby maintaining the heat balance of the power battery pack and ensuring the working reliability of the power battery pack. Moreover, the heating module realizes the waste heat recovery of high-temperature cooling water and / or high-temperature oil through the first heat exchange pipeline and / or the second heat exchange pipeline, and heats the coolant with the recovered high-temperature cooling water and / or high-temperature oil, improving the energy utilization rate. When it is necessary to cool the power battery, heat exchange is carried out with the coolant in the second coolant flow channel through the refrigerant flow channel to reduce the temperature of the coolant in the second coolant flow channel. The cooled coolant will then flow back to the power battery pack to achieve cooling of the power battery, thereby maintaining the heat balance of the power battery pack and ensuring the working reliability of the power battery pack. In summary, the plate heat exchanger provided by the present application has both heating and cooling functions at the same time, does not need to be used in cooperation with an additional plate heat exchanger, reduces the pipeline layout in the system, thereby effectively reducing costs, and is convenient for assembly and maintenance. At the same time, through the plate heat exchanger, the waste heat recovery and utilization of high-temperature cooling water and high-temperature oil in the vehicle can be realized, achieving multi-stage recovery of the vehicle's energy and improving the energy utilization rate.

[0007] In a possible design, the heating module includes a first heat exchange core body and a second heat exchange core body; the first heat exchange core body is provided with a first water inlet and a first water outlet, and the first heat exchange pipeline is formed in the first heat exchange core body; the second heat exchange core body is provided with a second water inlet and a second water outlet, and the second heat exchange pipeline is formed in the second heat exchange core body; wherein, the first water inlet, the first water outlet, the second water inlet, and the second water outlet are sequentially connected to form a first coolant flow channel.

[0008] In a possible design, the heating module further includes a first connection pipeline, one end of the first connection pipeline is connected to the first water outlet, and the other end of the first connection pipeline is connected to the second water inlet.

[0009] In the above technical solution, the first water inlet, the first water outlet, the first connection pipeline, the second water inlet, and the second water outlet are sequentially connected to form a first coolant flow channel. Through the first connection pipeline, the flow reliability of the coolant between the first heat exchange core body and the second heat exchange core body can be improved.

[0010] In a possible design, the cooling module includes a third heat exchange core body, the third heat exchange core body is provided with a third water inlet and a third water outlet, and the refrigerant flow channel is formed in the third heat exchange core body; wherein, the third water inlet and the third water outlet are connected to form a second coolant flow channel.

[0011] In a possible design, the plate heat exchanger further includes a second connecting pipe. One end of the second connecting pipe communicates with the first coolant flow channel, and the other end of the second connecting pipe communicates with the third water inlet.

[0012] In the above technical solution, the first coolant flow channel, the second connecting pipe, the third water inlet, and the third water outlet are connected in sequence to form a coolant circulation loop. The flow reliability of the coolant between the second heat exchange core and the third heat exchange core can be improved through the second connecting pipe.

[0013] In a possible design, a first valve assembly is provided on the first heat exchange pipe; the plate heat exchanger further includes a control circuit, and the control circuit is electrically connected to the first valve assembly. The control circuit is used to adjust the on / off and opening degree of the first valve assembly.

[0014] In the above technical solution, when it is necessary to heat the coolant with high-temperature cooling water, the control circuit will adjust the opening degree of the first valve assembly to be greater than zero, so that the first heat exchange pipe is connected, so that the high-temperature cooling water can flow into the first heat exchange pipe to increase the temperature of the coolant in the first coolant flow channel, thereby ensuring the heating reliability of the heating module. Moreover, by adjusting the opening degree of the first valve assembly, the flow rate of the high-temperature cooling water flowing into the first heat exchange pipe can be adjusted, so as to correspondingly adjust the heating efficiency of the first heat exchange core, and the adjustment flexibility is relatively high.

[0015] In a possible design, a second valve assembly is provided on the second heat exchange pipe. The second valve assembly is electrically connected to the control circuit, and the control circuit is also used to adjust the on / off and opening degree of the second valve assembly.

[0016] In the above technical solution, when it is necessary to heat the coolant with high-temperature oil, the control circuit will adjust the opening degree of the second valve assembly to be greater than zero, so that the second heat exchange pipe is connected, so that the high-temperature oil can flow into the second heat exchange pipe to increase the temperature of the coolant in the first coolant flow channel, thereby ensuring the heating reliability of the heating module. Moreover, by adjusting the opening degree of the second valve assembly, the flow rate of the high-temperature oil flowing into the second heat exchange pipe can be adjusted, so as to correspondingly adjust the heating efficiency of the second heat exchange core, and the adjustment flexibility is relatively high.

[0017] In a possible design, the plate heat exchanger further includes a temperature detection module; the temperature detection module is electrically connected to the control circuit. The temperature detection module is used to detect the temperature of the high-temperature cooling water in the first heat exchange pipe, and the control circuit is used to adjust the on / off and opening degree of the first valve assembly according to the temperature detected by the temperature detection module; and / or, the temperature detection module is used to detect the temperature of the high-temperature oil in the second heat exchange pipe, and the control circuit is used to adjust the on / off and opening degree of the second valve assembly according to the temperature detected by the temperature detection module.

[0018] In a possible design, a third valve assembly is provided on the refrigerant flow channel. The third valve assembly is electrically connected to a control circuit, and the control circuit is further configured to adjust the on / off state and the opening degree of the third valve assembly.

[0019] In the above technical solution, when it is necessary to cool the coolant with the refrigerant, the control circuit will adjust the opening degree of the third valve assembly to be greater than zero, so that the refrigerant flow channel is connected, enabling the refrigerant to flow into the refrigerant flow channel to reduce the temperature of the coolant in the second coolant flow channel, thereby ensuring the refrigeration reliability of the cooling module. When the third heat exchange core does not need to be heated, the control circuit will adjust the opening degree of the third valve assembly to zero to shut off the refrigerant flow channel. Moreover, by adjusting the opening degree of the third valve assembly, the flow rate of the refrigerant flowing into the refrigerant flow channel can be adjusted, thereby correspondingly adjusting the refrigeration efficiency of the third heat exchange core, and the adjustment flexibility is relatively high.

[0020] In a second aspect, the present application provides a vehicle, including the plate type heat exchanger according to any one of the optional embodiments of the first aspect and a power battery pack. The power battery pack is connected to the first coolant flow channel and the second coolant flow channel in the plate type heat exchanger to form a coolant circulation loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the module structure of a vehicle provided by an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the structure of a plate type heat exchanger provided by an embodiment of the present application;

[0023] Figure 3 is a top view structure schematic diagram of a plate type heat exchanger provided by an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the structure of another plate type heat exchanger provided by an embodiment of the present application;

[0025] Figure 5 is a schematic diagram of the module structure of a plate type heat exchanger provided by an embodiment of the present application;

[0026] Figure 6 is a side view structure schematic diagram of a plate type heat exchanger provided by an embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the structure of yet another plate type heat exchanger provided by an embodiment of the present application;

[0028] Figure 8 is a schematic diagram of the module structure of another plate type heat exchanger provided by an embodiment of the present application;

[0029] Figure 9It is a schematic diagram of the module structure of another plate heat exchanger provided by an embodiment of the present application.

[0030] Among them, the reference numerals in the figure are as follows:

[0031] 1. Plate heat exchanger; 11. Mounting plate; 12. Heating module; 12A. First coolant flow channel; 121. First heat exchange pipe; 121A. First input end; 121B. First output end; 1211. First valve assembly; 122. Second heat exchange pipe; 122A. Second input end; 122B. Second output end; 1221. Second valve assembly; 123. First heat exchange core; 123A. First water inlet; 123B. First water outlet; 124. Second heat exchange core; 124A. Second water inlet; 124B. Second water outlet; 125. First connecting pipe; 13. Cooling module; 13A. Second coolant flow channel; 13B. Refrigerant flow channel; 131. Third heat exchange core; 131A. Third water inlet; 131B. Third water outlet; 132. Third valve assembly; 14. Second connecting pipe; 15. Control circuit; 16. Temperature detection module; 2. Power battery pack. Detailed implementation manners

[0032] In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and circuits are omitted to avoid unnecessary details from interfering with the description of the present application.

[0033] Power batteries are usually provided in new energy construction machinery (such as new energy vehicles, electric construction machinery, hybrid construction machinery, etc.) to provide power for the new energy construction machinery. At the same time, battery liquid cooling plates are usually provided in the new energy construction machinery to perform thermal management on the power battery through the battery liquid cooling plate. Further, in order to achieve heat exchange between the battery liquid cooling plate and other thermal management circuits, a plate heat exchanger is usually provided in the new energy construction machinery. The plate heat exchanger can heat, cool, or keep the temperature constant of the coolant for the power battery, so that the power battery can work within a suitable working temperature range, thereby slowing down the problem of power battery performance degradation and extending the service life of the power battery.

[0034] A plate heat exchanger usually consists of a series of metal plates placed in parallel. There are certain gaps between the metal plates, allowing the coolant of the power battery and other fluids in new energy construction machinery to pass through these gaps for heat exchange. For example, a plate heat exchanger usually allows two independent fluids to flow through it, one being the heat source fluid and the other being the cooling fluid. When these two fluids pass through the plate heat exchanger, heat energy is transferred between them, thereby achieving heat exchange to heat or cool the coolant of the power battery.

[0035] However, the plate heat exchangers in the current related technologies are usually plate heat exchangers with only a single function, such as a battery cooling plate heat exchanger and a battery heating plate heat exchanger. If multiple functions are to be achieved, multiple different plate heat exchangers need to be configured. For example, when the functions of heating and cooling are required simultaneously, the battery cooling plate heat exchanger and the battery heating plate heat exchanger need to be integrated and connected together to form a heat and cold integrated plate heat exchanger for heat exchange. In this way, the pipeline layout in new energy construction machinery is complicated, and the manufacturing cost is relatively high.

[0036] Therefore, the present application provides a plate heat exchanger and a vehicle. The plate heat exchanger has both heating and cooling functions at the same time, without the need to cooperate with an additional plate heat exchanger, reducing the pipeline layout in the system, thereby effectively reducing the cost, and facilitating assembly and maintenance. At the same time, through the plate heat exchanger, the recovery and utilization of the waste heat of the high-temperature cooling water and high-temperature oil in the vehicle can be realized, achieving multi-stage recovery of the energy of the whole vehicle and improving the energy utilization rate.

[0037] The plate heat exchanger and the vehicle provided by the present application will be introduced exemplarily below with reference to the accompanying drawings.

[0038] As Figure 1 shown, an embodiment of the present application provides a vehicle, including a plate heat exchanger 1 and a power battery pack 2. The plate heat exchanger 1 and the power battery pack 2 are connected to form a coolant circulation loop, thereby realizing thermal management. Exemplarily, among them, the power battery pack 2 may include a power battery and a battery liquid cooling plate. The battery liquid cooling plate and the plate heat exchanger 1 are connected to form a coolant circulation loop. A coolant flowing through the power battery is provided in the battery liquid cooling plate. This coolant can flow into the plate heat exchanger 1 and return to the battery liquid cooling plate after heat exchange, thereby realizing heating or cooling of the power battery.

[0039] In order to enable the plate heat exchanger 1 to have both heating or cooling functions at the same time, in one example, as Figure 2As shown, the plate heat exchanger 1 may include a mounting plate 11, a heating module 12, and a cooling module 13. The heating module 12 and the cooling module 13 are respectively fixed to the mounting plate 11. Among them, the heating module 12 is provided with a first coolant flow channel 12A, a first heat exchange pipe 121, and a second heat exchange pipe 122. The cooling module 13 is provided with a second coolant flow channel 13A and a refrigerant flow channel 13B. The second coolant flow channel 13A is communicated with the first coolant flow channel 12A. At this time, the coolant output by the power battery pack 2 can flow back to the power battery pack 2 through the first coolant flow channel 12A and the second coolant flow channel 13A to form a coolant circulation loop.

[0040] Among them, two fixing grooves (not shown in the figure) may be provided on the mounting plate 11. The heating module 12 is fixed to the mounting plate 11 through one of the fixing grooves, and the cooling module 13 is fixed to the mounting plate 11 through the other fixing groove. In this way, the heating module 12 and the cooling module 13 can be respectively fixed to the mounting plate 11 through the two fixing grooves, so as to improve the connection firmness between the mounting plate 11, the heating module 12, and the cooling module 13, and further ensure the working reliability of the heating module 12 and the cooling module 13.

[0041] The first heat exchange pipe 121 in the heating module 12 is communicated with the engine or the motor inside the vehicle to access the cooling water inside the engine or motor water jacket. Here, it can be understood that when the vehicle is running, the engine and the motor inside the vehicle are running, so the cooling water inside the engine and motor water jacket is high-temperature cooling water. When it is necessary to increase the temperature of the coolant, the first heat exchange pipe 121 accesses the high-temperature cooling water, and the high-temperature cooling water will exchange heat with the coolant in the first coolant flow channel 12A to increase the temperature of the coolant. The coolant with increased temperature will flow back to the power battery pack 2 to realize the heating of the power battery, so as to maintain the heat balance of the power battery pack 2 and ensure the working reliability of the power battery pack 2. Moreover, the heating module 12 realizes the waste heat recovery of the high-temperature cooling water inside the engine and motor water jacket through the first heat exchange pipe 121, and heats the coolant with the recovered high-temperature cooling water, improving the energy utilization rate.

[0042] Here, it is worth noting that the plate heat exchanger 1 provided in this application can also be applied to other new energy construction machinery, such as electric construction machinery and hybrid construction machinery. At this time, the first heat exchange pipe 121 in the heating module 12 is communicated with the engine, the motor or other devices in the new energy construction machinery to access the high-temperature cooling water. In this regard, this application does not make specific restrictions.

[0043] The second heat exchange pipe 122 in the heating module 12 is connected to the hydraulic system oil tank or the transmission inside the vehicle to access the oil in the hydraulic system oil tank or the transmission. Here, it can be understood that when the vehicle is running, the hydraulic system oil tank and the transmission inside the vehicle are operating, so the oil in the hydraulic system oil tank and the transmission is high-temperature oil. When it is necessary to increase the temperature of the coolant, the second heat exchange pipe 122 accesses the high-temperature oil, and this high-temperature oil will exchange heat with the coolant in the first coolant flow channel 12A to increase the temperature of the coolant. The coolant with increased temperature will then flow back to the power battery pack 2 to achieve heating of the power battery. Moreover, the heating module 12 recovers the waste heat of the high-temperature oil inside the hydraulic system oil tank and the transmission through the second heat exchange pipe 122, and heats the coolant with the recovered high-temperature oil, improving the energy utilization rate.

[0044] Here, it is worth noting that the plate heat exchanger 1 provided in this application can also be applied to other new energy construction machinery, for example, electric construction machinery, hybrid construction machinery. At this time, the second heat exchange pipe 122 in the heating module 12 is connected to the hydraulic system oil tank, transmission or other devices in the new energy construction machinery to access the high-temperature oil. In this regard, this application does not make specific restrictions.

[0045] In this way, through the heating module 12, this application can increase the temperature of the coolant through high-temperature cooling water and / or high-temperature oil to achieve heating of the power battery. Moreover, the heating module 12 recovers the waste heat of the high-temperature cooling water and / or high-temperature oil inside the vehicle through the first heat exchange pipe 121 and the second heat exchange pipe 122, and heats the coolant with the recovered high-temperature cooling water and / or high-temperature oil, thereby improving the energy utilization rate while ensuring the heating reliability of the heating module 12, without the need to set up additional heating devices and reducing the manufacturing cost.

[0046] In one example, please refer to Figure 3 and Figure 4 , the heating module 12 may include a first heat exchange core 123 and a second heat exchange core 124. The first heat exchange core 123 is provided with a first water inlet 123A and a first water outlet 123B. The first heat exchange pipe 121 is formed in the first heat exchange core 123. The second heat exchange core 124 is provided with a second water inlet 124A and a second water outlet 124B. The second heat exchange pipe 122 is formed in the second heat exchange core 124. In this example, the first water inlet 123A, the first water outlet 123B, the second water inlet 124A, and the second water outlet 124B are connected in sequence to form a first coolant flow channel 12A, that is, the coolant output by the power battery pack 2 will sequentially pass through the first water inlet 123A, the first water outlet 123B, the second water inlet 124A, and the second water outlet 124B to the second coolant flow channel 13A.

[0047] In this example, when the environmental temperature of the vehicle is relatively low and the power battery pack 2 needs to be heated, the temperature of the coolant can be increased through the first heat exchange core 123 and / or the second heat exchange core 124, which can be specifically set according to actual requirements. For example, assuming that it is desired to reduce the power consumption of the vehicle and the environmental temperature of the vehicle is relatively low, only the first heat exchange core 123 or the second heat exchange core 124 can be started, that is, the first heat exchange pipeline 121 is connected, so that the high-temperature cooling water is introduced into the first heat exchange pipeline 121, thereby increasing the temperature of the coolant in the first coolant flow channel 12A through the high-temperature cooling water. The heated coolant will then flow back to the power battery pack 2 through the second coolant flow channel 13A to achieve heating of the power battery, or the second heat exchange pipeline 122 is connected to introduce the high-temperature oil into the second heat exchange pipeline 122, thereby increasing the temperature of the coolant in the first coolant flow channel 12A through the high-temperature oil. The heated coolant will then flow back to the power battery pack 2 through the second coolant flow channel 13A to achieve heating of the power battery. For another example, assuming that it is desired to improve the heating efficiency, the first heat exchange core 123 and the second heat exchange core 124 can be started simultaneously, that is, the first heat exchange pipeline 121 and the second heat exchange pipeline 122 are connected simultaneously to introduce the high-temperature cooling water and the high-temperature oil into the first heat exchange pipeline 121 and the second heat exchange pipeline 122 respectively, so as to perform heat exchange with the coolant in the first coolant flow channel 12A, thereby increasing the temperature of the coolant and achieving dual heating to improve the heating efficiency. The first heat exchange pipeline 121 and the second heat exchange pipeline 122 can be selectively connected according to actual requirements, and the present application does not make specific limitations in this regard.

[0048] In order to achieve the selective connection of the first heat exchange pipeline 121, in one example, as Figure 5 shown, a first valve assembly 1211 is provided on the first heat exchange pipeline 121. The plate heat exchanger 1 further includes a control circuit 15, and the control circuit 15 is electrically connected to the first valve assembly 1211. The control circuit 15 is used to adjust the on-off and opening degree of the first valve assembly 1211. When it is necessary to heat the coolant with high-temperature cooling water, the control circuit 15 controls the first valve assembly 1211 to be connected, that is, the control circuit 15 adjusts the opening degree of the first valve assembly 1211 to be greater than zero, so that the first heat exchange pipeline 121 is connected, so that the high-temperature cooling water can flow into the first heat exchange pipeline 121 to increase the temperature of the coolant in the first coolant flow channel 12A, thereby ensuring the heating reliability of the heating module 12. When the first heat exchange core 123 does not need to be heated, the control circuit 15 controls the first valve assembly 1211 to be turned off, that is, the control circuit 15 adjusts the opening degree of the first valve assembly 1211 to zero to turn off the first heat exchange pipeline 121.

[0049] In this example, the flow rate of the high-temperature cooling water flowing into the first heat exchange pipe 121 through the first valve assembly 1211 can also be adjusted accordingly by adjusting the opening degree of the first valve assembly 1211. Exemplarily, the control circuit 15 can set the opening degree of the first valve assembly 1211 to 10%. At this time, the flow rate of the high-temperature cooling water flowing into the first heat exchange pipe 121 is small, and the temperature of the coolant can be increased by a small amount of high-temperature cooling water to raise the temperature of the power battery pack 2. The control circuit 15 can also set the opening degree of the first valve assembly 1211 to 90%. At this time, the flow rate of the high-temperature cooling water flowing into the first heat exchange pipe 121 is large, and the coolant can be quickly heated by a large amount of high-temperature cooling water to raise the temperature of the power battery pack 2, and the heating efficiency is relatively high. In this way, by adjusting the opening degree of the first valve assembly 1211, the flow rate of the high-temperature cooling water flowing into the first heat exchange pipe 121 can be adjusted, so as to correspondingly adjust the heating efficiency of the first heat exchange core 123, and the adjustment flexibility is relatively high.

[0050] Optionally, the first valve assembly 1211 can be a direct-acting solenoid valve, a pilot-operated solenoid valve, a proportional solenoid valve, a servo solenoid valve, a digital solenoid valve, or other valve assemblies that can achieve the above functions. In this regard, the present application does not make specific limitations.

[0051] In order to achieve the selective connection of the second heat exchange pipe 122, in one example, as Figure 5 shown, a second valve assembly 1221 is provided on the second heat exchange pipe 122. The second valve assembly 1221 is electrically connected to the control circuit 15, and the control circuit 15 is further configured to adjust the on / off and opening degree of the second valve assembly 1221. When it is necessary to heat the coolant with high-temperature oil, the control circuit 15 controls the second valve assembly 1221 to be connected, that is, the control circuit 15 adjusts the opening degree of the second valve assembly 1221 to be greater than zero, so that the second heat exchange pipe 122 is connected, so that the high-temperature oil can flow into the second heat exchange pipe 122 to increase the temperature of the coolant in the first coolant flow channel 12A, thereby ensuring the heating reliability of the heating module 12. When the second heat exchange core 124 does not need to be heated, the control circuit 15 controls the second valve assembly 1221 to be turned off, that is, the control circuit 15 adjusts the opening degree of the second valve assembly 1221 to zero, so as to turn off the second heat exchange pipe 122.

[0052] In this example, the flow rate of the high-temperature oil flowing into the second heat exchange pipe 122 can also be adjusted correspondingly by adjusting the opening degree of the second valve assembly 1221. Exemplarily, the control circuit 15 can set the opening degree of the second valve assembly 1221 to 10%. At this time, the flow rate of the high-temperature oil flowing into the second heat exchange pipe 122 is small, and the temperature of the coolant can be increased by a small amount of high-temperature oil, so as to increase the temperature of the power battery pack 2. The control circuit 15 can also set the opening degree of the second valve assembly 1221 to 90%. At this time, the flow rate of the high-temperature oil flowing into the second heat exchange pipe 122 is large, and the coolant can be quickly heated by a large amount of high-temperature oil, so as to increase the temperature of the power battery pack 2, and the heating efficiency is relatively high. In this way, by adjusting the opening degree of the second valve assembly 1221, the flow rate of the high-temperature oil flowing into the second heat exchange pipe 122 can be adjusted, so as to correspondingly adjust the heating efficiency of the second heat exchange core 124, and the adjustment flexibility is relatively high.

[0053] Optionally, the second valve assembly 1221 can be a direct-acting solenoid valve, a pilot-operated solenoid valve, a proportional solenoid valve, a servo solenoid valve, a digital solenoid valve or other valve assemblies that can achieve the above functions. In this regard, the present application does not make specific limitations.

[0054] In one example, as Figure 6 shown, the first heat exchange pipe 121 can include a first input end 121A and a first output end 121B that are connected. The second heat exchange pipe 122 can include a second input end 122A and a second output end 122B that are connected. Among them, the high-temperature cooling water can be input into the first heat exchange core 123 through the first input end 121A to achieve heat exchange with the coolant, and the high-temperature cooling water after participating in the heat exchange can flow back to the engine or motor through the first output end 121B to achieve circulation, so as to ensure the normal use of the engine and the motor. The high-temperature oil can be input into the second heat exchange core 124 through the second input end 122A to achieve heat exchange with the coolant, and the high-temperature oil after participating in the heat exchange can flow back to the hydraulic system oil tank or the gearbox through the second output end 122B to achieve circulation, so as to ensure the normal use of the hydraulic system oil tank or the gearbox.

[0055] To ensure the flow reliability of the coolant between the first heat exchange core 123 and the second heat exchange core 124, in one example, please refer to Figures 3 to 5, the heating module 12 further includes a first connecting pipe 125. One end of the first connecting pipe 125 communicates with the first water outlet 123B, and the other end of the first connecting pipe 125 communicates with the second water inlet 124A. In this way, the first water inlet 123A, the first water outlet 123B, the first connecting pipe 125, the second water inlet 124A, and the second water outlet 124B are sequentially connected to form a first coolant flow path 12A. The flow reliability of the coolant between the first heat exchange core 123 and the second heat exchange core 124 can be improved through the first connecting pipe 125.

[0056] Optionally, the first heat exchange core 123, the first connecting pipe 125, and the second heat exchange core 124 can be of an integrated structure or an independent structure, which is convenient for disassembly and maintenance.

[0057] In a low-temperature environment, the temperature of the coolant can be increased through the heating module 12 above to maintain the heat balance of the power battery pack 2, thereby ensuring the working reliability of the power battery pack 2. In a non-low-temperature environment, when the temperature of the power battery pack 2 is too high, in order to maintain the heat balance of the power battery pack 2, the cooling module 13 is required to reduce the temperature of the coolant. In one example, as Figure 7 shown, the cooling module 13 includes a third heat exchange core 131. The third heat exchange core 131 is provided with a third water inlet 131A and a third water outlet 131B. A refrigerant flow path 13B is formed in the third heat exchange core 131. The third water inlet 131A and the third water outlet 131B are connected to form a second coolant flow path 13A.

[0058] In this example, the refrigerant flow path 13B in the cooling module 13 is connected to the air-conditioning system in the vehicle to access the refrigerant (such as refrigerant) in the air-conditioning system. When it is necessary to reduce the temperature of the coolant, the refrigerant flow path 13B accesses the refrigerant, and the refrigerant will exchange heat with the coolant in the second coolant flow path 13A to reduce the temperature of the coolant. The coolant with reduced temperature will then flow back to the power battery pack 2 to achieve cooling of the power battery. The cooling module 13 can directly utilize the refrigerant in the air-conditioning system through the refrigerant flow path 13B without setting up an additional refrigeration device, reducing the manufacturing cost. When it is not necessary to reduce the temperature of the coolant, the refrigerant flow path 13B can be closed.

[0059] Here, it is worth noting that the plate heat exchanger 1 provided in the present application can also be applied to other new energy construction machinery, such as electric construction machinery and hybrid construction machinery. At this time, the second coolant flow path 13A in the cooling module 13 is connected to the air-conditioning system or other devices in the new energy construction machinery to access the refrigerant. For this, the present application does not make specific restrictions.

[0060] For selectively connecting the refrigerant flow path 13B, in one example, as Figure 8 shown, a third valve assembly 132 is provided on the refrigerant flow path 13B. The third valve assembly 132 is electrically connected to the control circuit 15, and the control circuit 15 is further configured to adjust the on / off state and opening degree of the third valve assembly 132. When it is necessary to cool the coolant with the refrigerant, the control circuit 15 controls the third valve assembly 132 to be connected, that is, the control circuit 15 adjusts the opening degree of the third valve assembly 132 to be greater than zero, so that the refrigerant flow path 13B is connected, enabling the refrigerant to flow into the refrigerant flow path 13B to reduce the temperature of the coolant in the second coolant flow path 13A, thereby ensuring the refrigeration reliability of the cooling module 13. When it is not necessary to heat the third heat exchange core 131, the control circuit 15 controls the third valve assembly 132 to be turned off, that is, the control circuit 15 adjusts the opening degree of the third valve assembly 132 to zero to turn off the refrigerant flow path 13B.

[0061] In this example, the flow rate of the refrigerant flowing into the refrigerant flow path 13B through the third valve assembly 132 can also be adjusted by adjusting the opening degree of the third valve assembly 132. Exemplarily, the control circuit 15 can set the opening degree of the third valve assembly 132 to 10%. At this time, the flow rate of the refrigerant flowing into the refrigerant flow path 13B is small, and the temperature of the coolant can be reduced with less refrigerant to lower the temperature of the power battery pack 2. The control circuit 15 can also set the opening degree of the third valve assembly 132 to 90%. At this time, the flow rate of the refrigerant flowing into the refrigerant flow path 13B is large, and the coolant can be quickly cooled with more refrigerant to lower the temperature of the power battery pack 2, and the refrigeration efficiency is high. Thus, by adjusting the opening degree of the third valve assembly 132, the flow rate of the refrigerant flowing into the refrigerant flow path 13B can be adjusted, thereby correspondingly adjusting the refrigeration efficiency of the third heat exchange core 131, and the adjustment flexibility is high.

[0062] Optionally, the third valve assembly 132 can be an electronic expansion valve, a direct-acting solenoid valve, a pilot-operated solenoid valve, a proportional solenoid valve, a servo solenoid valve, a digital solenoid valve, or other valve assemblies capable of realizing the above functions. In this regard, the present application does not make specific limitations.

[0063] To ensure the flow reliability of the coolant between the first heat exchange pipe 121 and the second heat exchange pipe 122, in one example, please refer to Figure 7 and Figure 8, the plate heat exchanger 1 further includes a second connecting pipe 14. One end of the second connecting pipe 14 communicates with the first coolant flow channel 12A, and the other end of the second connecting pipe 14 communicates with the third water inlet 131A. In this way, the first water inlet 123A, the first water outlet 123B, the first connecting pipe 125, the second water inlet 124A, the second water outlet 124B, the second connecting pipe 14, the third water inlet 131A, and the third water outlet 131B are sequentially connected to form a coolant circulation loop. Through the second connecting pipe 14, the flow reliability of the coolant between the second heat exchange core 124 and the third heat exchange core 131 can be improved.

[0064] Optionally, the second heat exchange core 124, the second connecting pipe 14, and the third heat exchange core 131 can be of an integral structure or an independent structure, which is convenient for disassembly and maintenance.

[0065] Optionally, the first heat exchange core 123, the second heat exchange core 124, and the third heat exchange core 131 are of an integrally formed integrated structure or an independent structure, which is convenient for disassembly and maintenance.

[0066] In order to be able to adjust the temperature of the coolant in real time based on the required temperature, in one example, as Figure 9 shown, the heating module 12 further includes a temperature detection module 16. The temperature detection module 16 is electrically connected to the control circuit 15. The temperature detection module 16 can be installed near the first heat exchange pipe 121 to detect the temperature of the high-temperature cooling water in the first heat exchange pipe 121. The temperature detection module 16 will also send the detected temperature information to the control circuit 15, so that the control circuit 15 correspondingly adjusts the on-off and opening degree of the first valve assembly 1211 based on this temperature. Exemplarily, when the temperature detection module 16 detects that the temperature of the high-temperature cooling water output by the engine or motor reaches the preset temperature. Here, it is worth noting that the preset temperature refers to the temperature that can cause the temperature of the coolant to rise. For example, assume the preset temperature is 50 °C (degrees Celsius). When the temperature detection module 16 detects that the temperature of the high-temperature cooling water is greater than or equal to 50 °C, it sends this temperature information to the control circuit 15. The control circuit 15 can control the first valve assembly 1211 to be connected based on this temperature information, so that the opening degree of the first valve assembly 1211 is adjusted to be greater than zero, and the first heat exchange pipe 121 is connected, so that the high-temperature cooling water can flow into the first heat exchange pipe 121 to increase the temperature of the coolant in the first coolant flow channel 12A, thereby ensuring the heating reliability of the heating module 12. When the temperature detection module 16 detects that the temperature of the high-temperature cooling water is less than 50 °C, it sends this temperature information to the control circuit 15. The control circuit 15 can control the first valve assembly 1211 to be turned off based on this temperature information, so that the opening degree of the first valve assembly 1211 is adjusted to zero, and the first heat exchange pipe 121 is turned off.

[0067] Exemplarily, the temperature detection module 16 can also be installed near the second heat exchange pipe 122 to detect the temperature of the high-temperature oil in the second heat exchange pipe 122. The temperature detection module 16 will also send the detected temperature information to the control circuit 15, so that the control circuit 15 correspondingly adjusts the on / off and opening degree of the second valve assembly 1221 based on the temperature. The specific adjustment process can refer to the adjustment process of the first valve assembly 1211 above, and will not be elaborated here.

[0068] Optionally, the temperature detection module 16 can include two temperature sensors. One temperature sensor is installed near the first heat exchange pipe 121 to detect the temperature of the high-temperature cooling water in the first heat exchange pipe 121; the other temperature sensor is installed near the second heat exchange pipe 122 to detect the temperature of the high-temperature oil in the second heat exchange pipe 122. By using two temperature sensors to detect the high-temperature cooling water and the high-temperature oil respectively, the detection reliability of the temperature detection module 16 is improved.

[0069] The plate heat exchanger 1 provided in this application has heating and refrigeration functions. When it is necessary to heat the power battery, heat exchange is performed between the first heat exchange pipe 121 and / or the second heat exchange pipe 122 and the coolant in the first coolant flow channel 12A to increase the temperature of the coolant in the first coolant flow channel 12A. The heated coolant will then flow back to the power battery pack 2 to achieve heating of the power battery, thereby maintaining the heat balance of the power battery pack 2 and ensuring the working reliability of the power battery pack 2. Moreover, the heating module 12 recovers the waste heat of the high-temperature cooling water and / or the high-temperature oil through the first heat exchange pipe 121 and / or the second heat exchange pipe 122, and heats the coolant with the recovered high-temperature cooling water and / or high-temperature oil, improving the energy utilization rate. When it is necessary to cool the power battery, heat exchange is performed between the refrigerant flow channel 13B and the coolant in the second coolant flow channel 13A to reduce the temperature of the coolant in the second coolant flow channel 13A. The cooled coolant will then flow back to the power battery pack 2 to achieve cooling of the power battery, thereby maintaining the heat balance of the power battery pack 2 and ensuring the working reliability of the power battery pack 2. In summary, the plate heat exchanger 1 provided in this application has both heating and refrigeration functions, does not need to cooperate with an additional plate heat exchanger, reduces the layout of pipelines in the system, thereby effectively reducing costs, and is convenient for assembly and maintenance. At the same time, through the plate heat exchanger 1, the waste heat of the high-temperature cooling water and the high-temperature oil in the vehicle can be recovered and utilized, realizing multi-level recovery of the vehicle's energy and improving the energy utilization rate.

[0070] Here, it is worth noting that the plate heat exchanger 1 provided in this application can also be applied to other new energy construction machinery, for example, electric construction machinery and hybrid construction machinery, and can also achieve the above-mentioned effects of heating, cooling, and energy recovery and utilization. Therefore, no further elaboration will be provided here.

[0071] It should be understood that when used in the specification and appended claims of this application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0072] It should also be understood that the term "and / or" used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0073] In addition, in the description of the specification and appended claims of this application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0074] The reference to "one embodiment" or "some embodiments" in the specification of this application means that a specific feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of this application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having", and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0075] The above-described embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application and should all be included within the protection scope of this application.

Claims

1. A plate heat exchanger (1), characterized in that: The plate heat exchanger (1) comprises: Mounting plate (11); A heating module (12), the heating module (12) being fixed to the mounting plate (11), the heating module (12) being provided with a first cooling liquid flow channel (12A), a first heat exchange pipe (121) and a second heat exchange pipe (122); and, A cooling module (13), the cooling module (13) being fixed to the mounting plate (11), the cooling module (13) being provided with a second cooling liquid flow channel (13A) and a refrigerant flow channel (13B), the second cooling liquid flow channel (13A) being in communication with the first cooling liquid flow channel (12A); The first heat exchange pipe (121) is used to connect to high-temperature cooling water, and the second heat exchange pipe (122) is used to connect to high-temperature oil.

2. The plate heat exchanger (1) according to claim 1, characterized in that: The heating module (12) comprises: a first heat exchange core (123), wherein the first heat exchange core (123) is provided with a first water inlet (123A) and a first water outlet (123B), and the first heat exchange pipe (121) is formed in the first heat exchange core (123); and A second heat exchange core (124), wherein the second heat exchange core (124) is provided with a second water inlet (124A) and a second water outlet (124B), and the second heat exchange pipe (122) is formed in the second heat exchange core (124); The first water inlet (123A), the first water outlet (123B), the second water inlet (124A) and the second water outlet (124B) are connected in sequence to form the first coolant flow channel (12A).

3. The plate heat exchanger (1) according to claim 2, characterized in that: The heating module (12) further comprises: A first connecting pipe (125), one end of the first connecting pipe (125) is connected to the first water outlet (123B), and the other end of the first connecting pipe (125) is connected to the second water inlet (124A).

4. The plate heat exchanger (1) according to claim 1, characterized in that: The cooling module (13) comprises: A third heat exchange core (131), wherein the third heat exchange core (131) is provided with a third water inlet (131A) and a third water outlet (131B), and the refrigerant flow channel (13B) is formed in the third heat exchange core (131); Wherein, the third water inlet (131A) and the third water outlet (131B) are connected to form the second coolant flow channel (13A).

5. The plate heat exchanger (1) according to claim 4, characterized in that: The plate heat exchanger (1) further comprises: A second connecting pipe (14), one end of the second connecting pipe (14) is connected to the first coolant flow channel (12A), and the other end of the second connecting pipe (14) is connected to the third water inlet (131A).

6. The plate heat exchanger (1) according to any one of claims 1 to 5, characterized in that: The first heat exchange pipe (121) is provided with a first valve assembly (1211); the plate heat exchanger (1) further comprises: A control circuit (15), the control circuit (15) being electrically connected to the first valve assembly (1211), the control circuit (15) being used to adjust the on / off state and the opening degree of the first valve assembly (1211).

7. The plate heat exchanger (1) according to claim 6, characterized in that: The second heat exchange pipe (122) is provided with a second valve assembly (1221), and the second valve assembly (1221) is electrically connected to the control circuit (15). The control circuit (15) is also used to adjust the on / off state and the opening degree of the second valve assembly (1221).

8. The plate heat exchanger (1) according to claim 7, characterized in that: The plate heat exchanger (1) further comprises: a temperature detection module (16), the temperature detection module (16) being electrically connected to the control circuit (15), the temperature detection module (16) being used to detect the temperature of the high-temperature cooling water in the first heat exchange pipe (121), and the control circuit (15) being used to adjust the on / off state and the opening degree of the first valve assembly (1211) according to the temperature detected by the temperature detection module (16); and / or, The temperature detection module (16) is used to detect the temperature of the high-temperature oil in the second heat exchange pipe (122), and the control circuit (15) is used to adjust the on-off and opening degree of the second valve assembly (1221) according to the temperature detected by the temperature detection module (16).

9. The plate heat exchanger (1) according to claim 6, characterized in that: A third valve assembly (132) is provided on the refrigerant flow channel (13B); the third valve assembly (132) is electrically connected to the control circuit (15); and the control circuit (15) is also used to adjust the on / off state and the opening degree of the third valve assembly (132).

10. A vehicle, characterized in that: include: The plate heat exchanger (1) according to any one of claims 1 to 9; as well as, A power battery pack (2), wherein the power battery pack (2) is connected to the first coolant flow channel (12A) and the second coolant flow channel (13A) in the plate heat exchanger (1) to form a coolant circulation loop.

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