Thermal management system

Abstract

The invention provides a heat management system which comprises a refrigerant circulation subsystem and a secondary refrigerant circulation subsystem, the secondary refrigerant circulation subsystem comprises a hot fluid circulation loop and a cold fluid circulation loop, the heat management system further comprises a plurality of heat exchange load tail ends, and when the heat exchange load tail ends are in a heating state, the heat exchange load tail ends are in a heat exchange state. An inlet and an outlet of each heat exchange load tail end are communicated with the hot fluid circulation loop so that the heat exchange load tail ends in the heating state can be connected in parallel. An inlet and an outlet of each heat exchange load tail end are communicated with the cold fluid circulation loop so that the heat exchange load tail ends in the refrigeration state can be connected in parallel. The state of each heat exchange load tail end can be independently adjusted, so that the functional requirements of each temperature adjusting object are met, and the adverse effect of fluctuation of one heat exchange load tail end on other heat exchange load tail ends is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a thermal management system. Background Art

[0002] At present, the thermal management technologies of electric motors, electronic controls, batteries and air conditioners in electric vehicles are relatively mature. How to reasonably control and utilize the heat at the ends of these loads has become the key. Most vehicles use an integrated solution on the thermal management water circuit side. Through valve circuit switching, the cold water circuit and the hot water circuit are connected in series to each heat exchange load terminal to achieve the purpose of comprehensive thermal management. However, this method of connecting the heat exchange load terminals in series cannot accurately match the loads of each load on the flow path. The output capacity of the heat pump system is only regulated according to the total load, resulting in energy waste. At the same time, when the load fluctuates greatly, it is easy to cause temperature fluctuations at other terminals, especially for the air conditioning terminal in the cockpit, resulting in large temperature fluctuations in the car, affecting comfort. Summary of the invention

[0003] Therefore, the present invention provides a thermal management system that can overcome the technical problem in the related art that the heat exchange load terminals in the thermal management system are connected in series, and when the load fluctuation at one load terminal is large, it will cause the temperature fluctuation of other load terminals.

[0004] In order to solve the above problems, the present invention provides a thermal management system, including a refrigerant circulation subsystem and a coolant circulation subsystem, the refrigerant circulation subsystem including a plate condensing heat exchanger and a plate evaporating heat exchanger, the coolant circulation subsystem including a hot fluid circulation loop and a cold fluid circulation loop, wherein the hot fluid circulation loop has a first heat exchange pipe section in the plate condensing heat exchanger, and the cold fluid circulation loop has a second heat exchange pipe section in the plate evaporating heat exchanger, the thermal management system also includes a plurality of heat exchange load terminals, each of the heat exchange load terminals has a heating state and a cooling state, when the heat exchange load terminal is in the heating state, the inlet and outlet of the heat exchange load terminal are connected with the hot fluid circulation loop so that each heat exchange load terminal in the heating state is connected in parallel, when the heat exchange load terminal is in the cooling state, the inlet and outlet of the heat exchange load terminal are connected with the cold fluid circulation loop so that each heat exchange load terminal in the cooling state is connected in parallel, and each heat exchange load terminal can be controlled to switch between the heating state and the cooling state.

[0005] In some embodiments, the thermal management system also includes a state flow switching module configured in a one-to-one correspondence with each heat exchange load terminal, each of the state flow switching modules has a first port connected to the inlet of the corresponding heat exchange load terminal, a second port connected to the outlet of the corresponding heat exchange load terminal, a third port connected to the upstream side pipeline of the hot fluid circulation loop, a fourth port connected to the upstream side pipeline of the cold fluid circulation loop, a fifth port connected to the downstream side pipeline of the hot fluid circulation loop, and a sixth port connected to the downstream side pipeline of the cold fluid circulation loop. When the heat exchange load terminal is in the heating state, the first port is connected to the third port, the second port is connected to the fifth port, and the fourth port and the sixth port are cut off; when the heat exchange load terminal is in the cooling state, the first port is connected to the fourth port, the second port is connected to the sixth port, and the third port is connected to the fifth port.

[0006] In some embodiments, each of the heat exchange load terminals also has a truncated state. When the heat exchange load terminal is in the truncated state, at least one of the inlet and outlet of the heat exchange load terminal is disconnected from the hot fluid circulation loop and the cold fluid circulation loop; when the heat exchange load terminal is in the truncated state, the first port, the second port, the third port, the fourth port, the fifth port and the sixth port are all disconnected.

[0007] In some embodiments, the state flow switching module includes a valve seat, a cover shell and a valve core, the first port, the second port, the third port, the fourth port, the fifth port and the sixth port are all constructed on the top surface of the valve seat, the cover shell and the valve seat are buckled to form a sealed cavity, the valve core is assembled in the sealed cavity and can be driven to rotate to achieve the opening and closing of the first port, the second port, the third port, the fourth port, the fifth port and the sixth port and the corresponding matching of the heating state, the cooling state and the cut-off state.

[0008] In some embodiments, independent flow ports are respectively constructed on the cover shell at positions corresponding to the first port, the second port, the third port, the fourth port, the fifth port and the sixth port, and the cylindrical wall surface of the valve core has a cooling switching zone, a heating switching zone and a flow path cut-off zone uniformly divided along its circumference. When the cooling switching zone is positioned toward the top surface of the valve seat, the heat exchange load end corresponding to the state flow path switching module is in a cooling state; when the heating switching zone is positioned toward the top surface of the valve seat, the heat exchange load end corresponding to the state flow path switching module is in a heating state; when the flow path cut-off zone is positioned toward the top surface of the valve seat, the heat exchange load end corresponding to the state flow path switching module is in a cut-off state.

[0009] In some embodiments, with the rotation axis of the valve core as a reference, the top surface of the valve seat is divided into a left area and a right area, in the left area, the third port, the sixth port, and the second port are arranged in sequence along the axial direction of the rotation axis, and in the right area, the first port, the fourth port, and the fifth port are arranged in sequence along the axial direction, and a first connecting groove and a second connecting groove independent of each other are provided in the cooling switching area, the first connecting groove can connect the first port and the fourth port, and the second connecting groove can connect the second port and the sixth port; the heating switching area is provided with a third connecting groove and a fourth connecting groove independent of each other, the third connecting groove can connect the first port and the third port, and the fourth connecting groove can connect the second port and the fifth port.

[0010] In some embodiments, the cooling switching area, the heating switching area and the flow path cutoff area are sequentially arranged along the same rotation direction of the valve core.

[0011] In some embodiments, an inlet flow regulating valve is assembled on the valve seat, and the first port is communicated with the inlet via the inlet flow regulating valve.

[0012] In some embodiments, a first flow regulating valve is connected in series on the pipeline between the third port and the first port, a second flow regulating valve is connected in series on the pipeline between the fourth port and the first port, a third flow regulating valve is connected in series on the pipeline between the fifth port and the second port, and a fourth flow regulating valve is connected in series on the pipeline between the sixth port and the second port.

[0013] In some embodiments, an expansion tank is further provided on the pipeline of the thermal fluid circulation loop; and / or, the thermal management system is a vehicle thermal management system.

[0014] A thermal management system provided by the present invention has the following beneficial effects:

[0015] The inlet and outlet of each heat exchange load terminal in the thermal management system can be switched and connected with the hot fluid circulation loop and the cold fluid circulation loop to realize the switching of the heating state and the cooling state of the corresponding heat exchange load terminal. At the same time, each heat exchange load terminal is connected to the thermal management system in parallel with each other, and the state of each heat exchange load terminal can be adjusted independently to meet the functional requirements of each temperature control object. Since each heat exchange load terminal adopts a parallel mode rather than a series mode, the adverse effect of fluctuation of one heat exchange load terminal on other heat exchange load terminals is reduced; the load terminal can be increased or decreased according to actual needs (such as different models), and the adaptability is strong. In addition, the parallel terminal design method has strong responsiveness to local load failures of the system, which enhances the reliability of the system. When a branch needs maintenance, the part can also be quickly isolated. At the same time, it can also avoid the large pipeline length and flow resistance when the heat exchange load terminals are connected in series, which can reduce the power consumption of the water pump and the heat loss of the pipeline to a certain extent. When the thermal management system is applied to a vehicle, it can significantly reduce the fluctuation control of the temperature adjustment in the passenger compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 is a system schematic diagram of a thermal management system in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the flow path of the thermal management system in the vehicle cabin cooling mode (one in-vehicle heat exchanger for cooling);

[0019] Figure 3 yes Figure 1 Schematic diagram of the flow path of the thermal management system in the vehicle cabin cooling mode (two in-vehicle heat exchangers are connected in parallel for cooling);

[0020] Figure 4 yes Figure 1 Schematic diagram of the flow path when the thermal management system in the vehicle cabin cooling, battery cooling and motor electronic control cooling modes are running (one in-vehicle heat exchanger for cooling);

[0021] Figure 5 yes Figure 1 Schematic diagram of the flow path of the thermal management system in the vehicle cabin heating, battery heating and motor electronic heat recovery mode (one in-vehicle heat exchanger for cooling);

[0022] Figure 6 It is a three-dimensional structural schematic diagram (structural exploded diagram) of a state flow path switching module according to an embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram (cross section) of the flow direction of a state flow path switching module corresponding to a heat exchange load end in a cooling state according to an embodiment of the present invention;

[0024] Figure 8 yes Figure 7 A simplified schematic diagram of

[0025] Fig. 9 It is a schematic diagram (cross section) of the flow direction of a flow path corresponding to a heat exchange load end corresponding to a state flow path switching module of an embodiment of the present invention being in a heating state;

[0026] Fig.10 yes Fig. 9 A simplified schematic diagram of

[0027] Fig.11 It is a simplified schematic diagram of the flow direction of a flow path corresponding to a truncated state of a heat exchange load end corresponding to a state flow path switching module of an embodiment of the present invention;

[0028] Fig.12 yes Figure 6 A schematic diagram of the three-dimensional structure of the cover shell (partial cross-section);

[0029] Fig.13 yes Figure 6 A schematic diagram of the structure of the refrigeration switching area of ​​the valve core;

[0030] Fig.14 yes Figure 6 A schematic diagram of the structure of the heating switching area of ​​the valve core;

[0031] Fig.15 yes Figure 6 A schematic diagram of the structure of the flow path cutoff area of ​​the valve core;

[0032] Fig.16 yes Figure 6 Schematic diagram of the three-dimensional structure of the valve seat (partial cross-section);

[0033] Fig.17 It is a schematic diagram of the structural principle of a state flow path switching module according to another embodiment of the present invention.

[0034] The accompanying drawings are marked as follows:

[0035] 11. Plate condensing heat exchanger; 12. Plate evaporating heat exchanger; 13. Throttling element; 14. Compressor; 15. Gas-liquid separator; 101. External heat exchanger; 102. First internal heat exchanger; 103. Second internal heat exchanger; 104. Motor electronically controlled heat exchanger; 105. Battery heat exchanger; 200. State flow path switching module; 201. First port; 202. Second port; 203. Third port; 204. Fourth port; 205. Fifth port; 206. Sixth port; 207. Inlet Flow regulating valve; 2081, first flow regulating valve; 2082, second flow regulating valve; 2083, third flow regulating valve; 2084, fourth flow regulating valve; 301, valve seat; 302, cover; 3021, flow port; 303, valve core; 3031, first connecting groove; 3032, second connecting groove; 3033, third connecting groove; 3034, fourth connecting groove; 3035, driving wheel shaft; 401, expansion water tank; 501, first water pump; 502, second water pump. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0040] See also Figure 1 and Fig.17As shown, according to an embodiment of the present invention, a thermal management system is provided, in particular, a vehicle thermal management system, including a refrigerant circulation subsystem (not labeled in the figure) and a secondary coolant circulation subsystem (not labeled in the figure), the refrigerant circulation subsystem including a plate condensing heat exchanger 11, a plate evaporating heat exchanger 12, a throttling element 13, a compressor 14 and a gas-liquid separator 15 connected in series at the air intake of the compressor 14, the aforementioned components are connected in series to form a refrigerant circulation loop, the secondary coolant (such as coolant) circulation subsystem includes a hot fluid circulation loop and a cold fluid circulation loop, wherein the hot fluid circulation loop has a first heat exchange pipe section (not labeled in the figure) located in the plate condensing heat exchanger 11, the cold fluid circulation loop has a second heat exchange pipe section (not labeled in the figure) located in the plate evaporating heat exchanger 12, the aforementioned hot fluid circulation subsystem includes a plate condensing heat exchanger 11, a plate evaporating heat exchanger 12, a throttling element 13, a compressor 14 and a gas-liquid separator 15 connected in series at the air intake of the compressor 14, the aforementioned components are connected in series to form a refrigerant circulation loop, the secondary coolant (such as coolant) circulation subsystem includes a hot fluid circulation loop and a cold fluid circulation loop, wherein the hot fluid circulation loop has a first heat exchange pipe section (not labeled in the figure) located in the plate condensing heat exchanger 11, the cold fluid circulation loop has a second heat exchange pipe section (not labeled in the figure) located in the plate evaporating heat exchanger 12, the aforementioned hot fluid circulation A first water pump 501 is connected in series in the loop to provide power for the circulation of the hot fluid, and a second water pump 502 is connected in series in the aforementioned cold fluid circulation loop to provide power for the circulation of the cold fluid. The thermal management system also includes a plurality of heat exchange load terminals (not labeled in the figure), each of which has a heating state and a cooling state. When the heat exchange load terminal is in the heating state, the inlet and outlet of the heat exchange load terminal are connected to the hot fluid circulation loop so that each heat exchange load terminal in the heating state is connected in parallel. When the heat exchange load terminal is in the cooling state, the inlet and outlet of the heat exchange load terminal are connected to the cold fluid circulation loop so that each heat exchange load terminal in the cooling state is connected in parallel, and each heat exchange load terminal can be controlled to switch between the heating state and the cooling state.

[0041] In this technical solution, the inlet and outlet of each heat exchange load terminal in the thermal management system can be switched and connected with the hot fluid circulation loop and the cold fluid circulation loop to realize the switching of the heating state and the cooling state of the corresponding heat exchange load terminal. At the same time, each heat exchange load terminal is connected to the thermal management system in parallel with each other, and can independently adjust the state of each heat exchange load terminal to meet the functional requirements of each temperature control object. Since each heat exchange load terminal adopts a parallel mode rather than a series mode, the adverse effect of fluctuation of one heat exchange load terminal on other heat exchange load terminals is reduced; the load terminal can be increased or decreased according to actual needs (such as different models), and the adaptability is strong. In addition, the parallel terminal design method has strong responsiveness to local load failures of the system, which enhances the reliability of the system. When a branch needs maintenance, the part can also be quickly isolated. At the same time, it can also avoid the large pipeline length and flow resistance when each heat exchange load terminal is connected in series, which can reduce the power consumption of the water pump and the heat loss of the pipeline to a certain extent. When the thermal management system is applied to a vehicle, it can significantly reduce the fluctuation control of the temperature adjustment in the passenger compartment.

[0042] The aforementioned heat exchange load end may be, for example, an external heat exchanger 101, a first internal heat exchanger 102, a second internal heat exchanger 103, a battery heat exchanger 105, a motor electronic control heat exchanger 104, and of course, may also be a seat heat exchanger, a vehicle refrigerator heat exchanger, and other load ends that need to be cooled or heated.

[0043] In some embodiments, the thermal management system further includes a state flow path switching module 200 configured in one-to-one correspondence with each heat exchange load terminal, each of the state flow path switching modules 200 having a first port 201 connected to the inlet of the corresponding heat exchange load terminal, a second port 202 connected to the outlet of the corresponding heat exchange load terminal, a third port 203 connected to the upstream side pipeline of the hot fluid circulation loop, a fourth port 204 connected to the upstream side pipeline of the cold fluid circulation loop, and a fifth port 205 connected to the downstream side pipeline of the hot fluid circulation loop. The first port 201 is connected to the third port 203, the second port 202 is connected to the fifth port 205, and the fourth port 204 and the sixth port 206 are cut off; when the heat exchange load terminal is in the cooling state, the first port 201 is connected to the fourth port 204, the second port 202 is connected to the sixth port 206, and the third port 203 is connected to the fifth port 205.

[0044] In this technical solution, by using the state flow path switching module 200 with the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206, the switching connection between each heat exchange load terminal and the aforementioned hot fluid circulation loop and cold fluid circulation loop is realized, thereby realizing the parallel relationship between each heat exchange load terminal, thereby realizing flexible and independent control of the cooling and heating state of each heat exchange load terminal, making the thermal management system pipeline design simple and compact. This is conducive to increasing or reducing the number of heat exchange load terminals in the thermal management system according to actual working conditions, and is also conducive to conveniently removing a heat exchange load terminal when it fails and needs maintenance.

[0045] In some embodiments, each of the heat exchange load terminals also has a truncated state. When the heat exchange load terminal is in the truncated state, at least one of the inlet and outlet of the heat exchange load terminal is disconnected from the hot fluid circulation loop and the cold fluid circulation loop. At this time, when the heat exchange load terminal is in the truncated state, the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206 are all disconnected.

[0046] Preferably, the aforementioned inlet and outlet are both disconnected from the hot fluid circulation loop and the cold fluid circulation loop, so that the corresponding heat exchange load end can be controlled to stop operating, and when a failure occurs at the heat exchange load end, it can be repaired online without affecting the normal operation of the entire thermal management system.

[0047] See also Figures 6 to 16 As shown, in some embodiments, the state flow path switching module 200 includes a valve seat 301, a cover 302 and a valve core 303, and the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206 are all constructed on the top surface of the valve seat 301, and it can be understood that the valve seat 301 and the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206 are respectively constructed with corresponding flow passages (not marked in the figure) and pipe bodies connected to each port, and the aforementioned ports, flow passages And each tube body is connected correspondingly. In the present invention, the aforementioned parts are simplified as a whole and are referred to as the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206. The cover shell 302 and the valve seat 301 are buckled together to form a sealed cavity (not marked in the figure). The valve core 303 is assembled in the sealed cavity and can be driven to rotate to realize the opening and closing of the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205 and the sixth port 206 and the corresponding matching of the heating state, the cooling state and the cut-off state.

[0048] In this technical solution, the state flow path switching module 200 is formed by assembling the valve seat 301, the cover shell 302 and the valve core 303. The structure is simple and compact. In specific applications, each port can be connected to the corresponding pipeline.

[0049] In some embodiments, the housing 302 is provided with independent flow ports 3021 at positions corresponding to the first port 201, the second port 202, the third port 203, the fourth port 204, the fifth port 205, and the sixth port 206, respectively. The cylindrical wall of the valve core 303 has a circumferentially uniformly divided cooling switching area (such as Fig.13 side shown), heating switching area (such as Fig.14 side shown) and flow path cut-off area (such as Fig.15When the cooling switching zone is positioned toward the top surface of the valve seat 301, the heat exchange load end corresponding to the state flow path switching module 200 is in a cooling state; when the heating switching zone is positioned toward the top surface of the valve seat 301, the heat exchange load end corresponding to the state flow path switching module 200 is in a heating state; when the flow path cut-off zone is positioned toward the top surface of the valve seat 301, the heat exchange load end corresponding to the state flow path switching module 200 is in a cut-off state; the valve core 303 can be switched between the cooling switching zone, the heating switching zone and the flow path cut-off zone in a rotating manner. In a specific embodiment, the valve core 303 is a cylinder, and a driving wheel shaft 3035 is provided at one end of the cylinder. The driving wheel shaft 3035 extends out of the outer side of the aforementioned cover shell 302, and the output shaft of the driving motor can drive the driving wheel shaft 3035 to rotate.

[0050] In this technical solution, by setting a cooling switching area, a heating switching area and a flow cutoff area on the outer wall of the valve core 303, and then forming the switching between three states of the state flow switching module 200 through the relative position relationship between each area and the top surface of the valve seat 301, the structural design is simple and the control is relatively simple.

[0051] In a preferred embodiment, the cooling switching zone, heating switching zone and flow cut-off zone are arranged in sequence along the same rotation direction of the valve core 303. Specifically, on the axial projection of the valve core 303, the cooling switching zone, heating switching zone and flow cut-off zone are respectively located in three 120° areas on the projection surface of the valve core 303, and are arranged in sequence along the clockwise direction. In this way, the rotation of the driving motor can be controlled by controlling the step angle of the rotating valve core by 120°, thereby further simplifying the control logic of the motor.

[0052] See Fig.16 As shown, with the orientation shown in the figure as a reference, in some embodiments, with the rotation axis of the valve core 303 as a reference, the top surface of the valve seat 301 is divided into a left area and a right area, in the left area, the third port 203, the sixth port 206, and the second port 202 are sequentially arranged along the axial direction of the rotation axis, and in the right area, the first port 201, the fourth port 204, and the fifth port 205 are sequentially arranged along the axial direction, and the refrigeration switching area is provided with independent first connecting grooves 3031 (such as Fig.13 As shown) and the second connecting groove 3032 (as shown Fig.13 The first connecting groove 3031 can connect the first port 201 and the fourth port 204, and the second connecting groove 3032 can connect the second port 202 and the sixth port 206; the heating switching area is provided with independent third connecting grooves 3033 (as shown in Fig.14As shown) and the fourth connecting groove 3034 (as shown Fig.14 As shown), the third connecting groove 3033 can connect the first port 201 and the third port 203, and the fourth connecting groove 3034 can connect the second port 202 and the fifth port 205.

[0053] In this technical solution, by reasonably arranging the ports on the valve seat 301 and the corresponding arrangement of the connecting grooves, the connection of different interfaces can be achieved by simply controlling the valve core 303 to rotate a certain angle, thereby achieving accurate correspondence between the switching of various flow paths and the aforementioned cooling state, heating state and cut-off state, and the structure is more compact and reasonable.

[0054] In some embodiments, an inlet flow regulating valve 207 is assembled on the valve seat 301 for accurately controlling the fluid entering the heat exchange load end, and the first port 201 is connected to the inlet via the inlet flow regulating valve 207 .

[0055] In this technical solution, an inlet flow regulating valve 207 is arranged between the first port 201 and the inlet of the heat exchange load end to control the flow of the refrigerant (such as water) entering each heat exchange load end, thereby achieving an accurate match between the refrigerant and the heat exchange load in the corresponding heat exchange load end, and allocating the flow of the refrigerant more accurately and flexibly.

[0056] In another feasible embodiment, a first flow regulating valve 2081 is connected in series on the pipeline between the third port 203 and the first port 201, a second flow regulating valve 2082 is connected in series on the pipeline between the fourth port 204 and the first port 201, a third flow regulating valve 2083 is connected in series on the pipeline between the fifth port 205 and the second port 202, and a fourth flow regulating valve 2084 is connected in series on the pipeline between the sixth port 206 and the second port 202. In this way, the switching control of each heat exchange load terminal in different states is realized by turning on and off each flow regulating valve. At the same time, the flow rate of the coolant entering and flowing out of the corresponding heat exchange load terminal can be accurately adjusted by adjusting the opening of each flow regulating valve, thereby ensuring accurate matching of each terminal with the load. This technical solution can be achieved by forming a corresponding flow channel on the valve seat 301 and assembling the corresponding flow regulating valve. The structural design is simpler, but the manufacturing cost is relatively high due to the need to use a larger flow regulating valve.

[0057] In some embodiments, an expansion water tank 401 is further provided on the pipeline of the thermal fluid circulation loop to ensure that the gas in the thermal fluid circulation loop is contained in the expansion water tank 401, thereby ensuring the reliable and stable operation of the first water pump 501 and effectively preventing cavitation damage to the water pump.

[0058] The following is a combination of the technical solution of the present invention Figures 1 to 5 Further elaboration:

[0059] Matching control of end load: see Figure 1 As shown, when the system load fluctuates, the flow rate at the end (that is, the aforementioned heat exchange load end) is adjusted to cope with the water temperature change of the system, and then the end load is matched to maintain its temperature unchanged. For example, initially, only the second in-vehicle heat exchanger 103 of the air conditioner has a cooling demand in the system, and the heat load of the battery heat exchanger 105 is suddenly increased. The increase in the total load may cause the water temperature output of the plate evaporative heat exchanger 12 to become lower and the flow rate of the second water pump 502 to become larger. If the heat exchange capacity of the second in-vehicle heat exchanger 103 is kept unchanged, the opening of the flow regulating valve (for example, the inlet flow regulating valve 207) in the state flow path switching module 200 corresponding to the second in-vehicle heat exchanger 103 can be reduced, so as to avoid the influence of the water temperature or the system water flow change on the in-vehicle temperature. The load matching control of other modules is similar and will not be repeated.

[0060] Figures 2 to 5 Several system operation modes of the present invention are provided. When only the air conditioner is cooling, the state flow path switching module 200 makes the corresponding external heat exchanger 101 in the heating state, makes the corresponding second internal heat exchanger 103 in the cooling state, and the other terminals are in the cut-off state. At this time, cold water enters the second internal heat exchanger 103 for cooling the interior of the vehicle, and hot water enters the external heat exchanger 101 for heat dissipation. Figure 2 When the load in the car is very large, the heat exchange may not meet the cooling and heating requirements in the car due to the limitation of indirect heat exchange and the size of the heat exchange in the car. Therefore, the present invention provides an operation mode when the load in the car is high, that is, Figure 3 The first in-car heat exchanger 102 and the second in-car heat exchanger 103 are connected in parallel for cooling operation, and the heating operation is similar to this. Figure 4 In the operation mode of air conditioning cooling + battery cooling + motor cooling, the cold water from the plate evaporative heat exchanger 12 enters the second in-vehicle heat exchanger 103, the motor electronically controlled heat exchanger 104, and the battery heat exchanger 105 for cooling through the corresponding state flow path switching module 200. In particular, Figure 5 The state flow switching module 200 configured corresponding to the motor electronic control heat exchanger 104 puts it in a heating state to recover the waste heat of the motor electronic control. When the motor electronic control has insufficient heat, it can still absorb heat from the external environment through the external heat exchanger 101.

[0061] Other modes not described can control the corresponding state flow path switching module 200 according to the cooling and heating needs of the terminal, so that each terminal is in one of the above-mentioned cooling state, heating state and cut-off state, and can be flexibly combined according to needs to realize multiple thermal management modes.

[0062] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A thermal management system, comprising a refrigerant circulation subsystem and a coolant circulation subsystem, characterized in that: The refrigerant circulation subsystem comprises a plate condensing heat exchanger (11) and a plate evaporating heat exchanger (12); the refrigerant circulation subsystem comprises a hot fluid circulation loop and a cold fluid circulation loop, wherein the hot fluid circulation loop comprises a first heat exchange pipe section located in the plate condensing heat exchanger (11), and the cold fluid circulation loop comprises a second heat exchange pipe section located in the plate evaporating heat exchanger (12); the thermal management system further comprises a plurality of heat exchange load terminals, each of the heat exchange load terminals having a heating state and a cooling state; when the heat exchange load terminal is in the heating state, an inlet and an outlet of the heat exchange load terminal are connected to the hot fluid circulation loop so that each of the heat exchange load terminals in the heating state is connected in parallel; when the heat exchange load terminal is in the cooling state, an inlet and an outlet of the heat exchange load terminal are connected to the cold fluid circulation loop so that each of the heat exchange load terminals in the cooling state is connected in parallel, and each of the heat exchange load terminals can be controlled to switch between the heating state and the cooling state.

2. The thermal management system according to claim 1, characterized in that: The invention also comprises a state flow path switching module (200) configured in one-to-one correspondence with each heat exchange load terminal, each of the state flow path switching modules (200) having a first port (201) connected to the inlet of the corresponding heat exchange load terminal, a second port (202) connected to the outlet of the corresponding heat exchange load terminal, a third port (203) connected to the upstream side pipeline of the hot fluid circulation loop, a fourth port (204) connected to the upstream side pipeline of the cold fluid circulation loop, a fifth port (205) connected to the downstream side pipeline of the hot fluid circulation loop, and a fifth port (206) connected to the downstream side pipeline of the cold fluid circulation loop. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal. The heat exchange load terminal is a heat exchange load terminal, and the heat exchange load terminal is a heat exchange load terminal.

3. The thermal management system according to claim 2, characterized in that: Each of the heat exchange load terminals also has a truncated state. When the heat exchange load terminal is in the truncated state, at least one of the inlet and the outlet of the heat exchange load terminal is disconnected from the hot fluid circulation loop and the cold fluid circulation loop. When the heat exchange load terminal is in the truncated state, the first port (201), the second port (202), the third port (203), the fourth port (204), the fifth port (205) and the sixth port (206) are all disconnected.

4. The thermal management system according to claim 3, characterized in that: The state flow path switching module (200) comprises a valve seat (301), a cover shell (302) and a valve core (303); the first port (201), the second port (202), the third port (203), the fourth port (204), the fifth port (205) and the sixth port (206) are all constructed on the top surface of the valve seat (301); the cover shell (302) and the valve seat (301) are snapped together to form a sealed cavity; the valve core (303) is assembled in the sealed cavity and can be driven to rotate to realize the opening and closing of the first port (201), the second port (202), the third port (203), the fourth port (204), the fifth port (205) and the sixth port (206) and the corresponding matching of the heating state, the cooling state and the cut-off state.

5. The thermal management system according to claim 4, characterized in that: Independent flow ports (3021) are respectively constructed on the casing (302) at positions corresponding to the first port (201), the second port (202), the third port (203), the fourth port (204), the fifth port (205) and the sixth port (206); the cylindrical wall surface of the valve core (303) is evenly divided into a cooling switching area, a heating switching area and a flow path cutoff area along its circumferential direction; when the cooling switching area is located toward the top surface of the valve seat (301), the heat exchange load end corresponding to the state flow path switching module (200) is in a cooling state; when the heating switching area is located toward the top surface of the valve seat (301), the heat exchange load end corresponding to the state flow path switching module (200) is in a heating state; when the flow path cutoff area is located toward the top surface of the valve seat (301), the heat exchange load end corresponding to the state flow path switching module (200) is in a cutoff state.

6. The thermal management system according to claim 5, characterized in that: With the rotation axis of the valve core (303) as a reference, the top surface of the valve seat (301) is divided into a left area and a right area. In the left area, the third port (203), the sixth port (206), and the second port (202) are sequentially spaced along the axial direction of the rotation axis. In the right area, the first port (201), the fourth port (204), and the fifth port (205) are sequentially spaced along the axial direction. The refrigeration switching area is provided with a first connecting groove (3031) and a second connecting groove (3032) that are independent of each other. The first connecting groove (3031) can connect the first port (201) and the fourth port (204), and the second connecting groove (3032) can connect the second port (202) and the sixth port (206); the heating switching area is provided with a third connecting groove (3033) and a fourth connecting groove (3034) which are independent of each other, the third connecting groove (3033) can connect the first port (201) and the third port (203), and the fourth connecting groove (3034) can connect the second port (202) and the fifth port (205).

7. The thermal management system according to claim 5, characterized in that: The cooling switching area, the heating switching area and the flow path cutoff area are arranged in sequence along the same rotation direction of the valve core (303).

8. The thermal management system according to claim 4, characterized in that: An inflow flow regulating valve (207) is assembled on the valve seat (301), and the first port (201) is connected to the inlet via the inflow flow regulating valve (207).

9. The thermal management system according to claim 2, characterized in that: A first flow regulating valve (2081) is connected in series to the pipeline between the third port (203) and the first port (201), a second flow regulating valve (2082) is connected in series to the pipeline between the fourth port (204) and the first port (201), a third flow regulating valve (2083) is connected in series to the pipeline between the fifth port (205) and the second port (202), and a fourth flow regulating valve (2084) is connected in series to the pipeline between the sixth port (206) and the second port (202).

10. The thermal management system according to claim 1, characterized in that: An expansion water tank (401) is also provided on the pipeline of the thermal fluid circulation loop; and / or the thermal management system is a vehicle thermal management system.

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