A heat recovery system, method, apparatus, device, and medium

Abstract

Embodiments of the present application disclose a heat recovery system, method, device, equipment and medium, comprising: obtaining a target operating state of an air conditioning circuit; when the target operating state is a refrigeration state, controlling a refrigeration sub-circuit and a first sub-circuit to operate, and closing a third port of a first three-way proportional valve, and controlling a radiator to operate in a heat dissipation mode; when the target operating state is a heating state, controlling a heating sub-circuit and the first sub-circuit to operate, and controlling the third port of the first three-way proportional valve to be conductive with a first port, so that engine oil in a second sub-circuit flows to the first sub-circuit. The embodiments of the present application improve the heat recovery rate of the engine oil, realize the effective utilization of the engine oil waste heat, improve the heating comfort of the passenger compartment, reduce the vehicle power consumption, and further improve the cruising range of the vehicle at low temperature. In the refrigeration state, the influence of the heat of the engine oil on the refrigeration of the air conditioning circuit is reduced, and the cruising time of the vehicle power supply is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a heat recovery system, method, device, equipment and medium. Background Art

[0002] Cars are an indispensable means of transportation for people. Based on their powertrain, cars can be categorized as internal combustion engine vehicles, electric vehicles, natural gas vehicles, hybrid electric vehicles, and fuel cell vehicles. Internal combustion engine vehicles and hybrid electric vehicles are equipped with engine oil circuits.

[0003] Typically, during engine operation, heat in the oil circuit is directly dissipated, resulting in low heat utilization. Therefore, how to improve the heat utilization rate of the oil circuit is an urgent problem that needs to be solved. Summary of the Invention

[0004] The embodiments of the present application solve the technical problem in the prior art that heat in the oil circuit is directly dissipated, resulting in low heat utilization rate, by providing a heat recovery system, method, device, equipment and medium, thereby achieving the technical effect of improving the heat utilization rate of the oil circuit.

[0005] In a first aspect, the present application provides a heat recovery system, the system comprising a controller, an air conditioning circuit, and an oil cooling circuit, wherein heat exchange is performed between the air conditioning circuit and the oil cooling circuit via an oil cooling heat exchanger;

[0006] The air conditioning circuit includes a cooling sub-circuit and a heating sub-circuit;

[0007] The oil cooling circuit includes a first sub-circuit and a second sub-circuit for circulation of engine oil;

[0008] The first sub-circuit includes a radiator, an oil-cooling heat exchanger, a second oil pump, a first port of a second three-way proportional valve, a second port of the second three-way proportional valve, and a radiator connected in sequence;

[0009] The third port of the second three-way proportional valve is connected to the oil pan of the second sub-circuit through a pressure check valve, and the pressure check valve leads to the oil pan from the third port of the second three-way proportional valve;

[0010] The third port of the first three-way proportional valve of the second sub-circuit is connected to the channel connecting the radiator and the second three-way proportional valve;

[0011] The controller is electrically connected to the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit respectively, and is used to control the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit to be turned on or off respectively.

[0012] In a second aspect, the present application provides a heat recovery method, which is applied to a heat recovery system as provided in the first aspect, and the method comprises:

[0013] Obtain the target operating status of the air conditioning circuit;

[0014] When the target operating state is the cooling state, the cooling sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve is closed to control the radiator to operate in the cooling mode;

[0015] When the target operating state is the heating state, the heating sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0016] Furthermore, when the target operating state is a heating state, the method further includes:

[0017] When the target operating state is heating, the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit are monitored;

[0018] When the actual operating temperature is less than or equal to a first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in a heat absorption mode, the third port and the first port of the first three-way proportional valve are controlled to be closed, and a first heating power of the heating sub-circuit is determined according to the actual space temperature of the passenger compartment space corresponding to the heating sub-circuit and a target heating temperature; the first preset threshold is less than the target heating temperature;

[0019] When the actual operating temperature is greater than the first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, the third port of the first three-way proportional valve is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit, and the second heating power of the heating sub-circuit is determined according to the actual space temperature, the actual operating temperature and the target heating temperature.

[0020] Furthermore, when the target operating state is the heating state, after monitoring the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit, the method further includes:

[0021] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, and a first opening degree of the first three-way proportional valve is determined to connect the third port to the first port based on the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit;

[0022] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, and the second opening degree of the first three-way proportional valve, which connects the third port to the first port, is determined according to the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0023] Furthermore, when the actual operating temperature is greater than the first preset threshold, controlling the heating sub-circuit and the first sub-circuit to operate includes:

[0024] When the actual operating temperature is greater than the first preset threshold and the actual operating temperature is less than or equal to the target heating temperature, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, and the openings of the third port and the first port of the first three-way proportional valve are controlled to be maximum, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0025] Furthermore, controlling the operation of the heating sub-loop includes:

[0026] The second electronic expansion valve of the heating sub-circuit and the second full-pass stop valve of the heating sub-circuit are controlled to be turned on, and the first electronic expansion valve of the cooling sub-circuit and the first full-pass stop valve of the cooling sub-circuit are controlled to be closed, so that the heating sub-circuit is in operation.

[0027] Furthermore, controlling the operation of the refrigeration sub-circuit includes:

[0028] The first electronic expansion valve and the first full-pass stop valve of the refrigeration sub-circuit are controlled to be turned on, and the second electronic expansion valve and the second full-pass stop valve of the heating sub-circuit are controlled to be closed, so that the refrigeration sub-circuit operates.

[0029] In a third aspect, the present application provides a heat recovery device, which is applied to a heat recovery system as provided in the first aspect, and the device includes:

[0030] A state acquisition module is used to obtain the target operating state of the air conditioning circuit;

[0031] a cooling control module, configured to control the cooling sub-circuit and the first sub-circuit to operate when the target operating state is the cooling state, and to close the third port of the first three-way proportional valve to control the radiator to operate in a cooling mode;

[0032] The heating control module is used to control the operation of the heating sub-circuit and the first sub-circuit when the target operating state is the heating state, and to control the third port of the first three-way proportional valve to be connected to the first port so that the oil in the second sub-circuit flows into the first sub-circuit.

[0033] Furthermore, the heating control module is used to:

[0034] When the target operating state is heating, the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit are monitored;

[0035] When the actual operating temperature is less than or equal to a first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in a heat absorption mode, the third port and the first port of the first three-way proportional valve are controlled to be closed, and a first heating power of the heating sub-circuit is determined according to the actual space temperature of the passenger compartment space corresponding to the heating sub-circuit and a target heating temperature; the first preset threshold is less than the target heating temperature;

[0036] When the actual operating temperature is greater than the first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, the third port of the first three-way proportional valve is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit, and the second heating power of the heating sub-circuit is determined according to the actual space temperature, the actual operating temperature and the target heating temperature.

[0037] Furthermore, the heating control module is used to:

[0038] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, and a first opening degree of the first three-way proportional valve is determined to connect the third port to the first port based on the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit;

[0039] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, and the second opening degree of the first three-way proportional valve, which connects the third port to the first port, is determined according to the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0040] Furthermore, the heating control module is used to:

[0041] When the actual operating temperature is greater than the first preset threshold and the actual operating temperature is less than or equal to the target heating temperature, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in the heat absorption mode, and the openings of the third port and the first port of the first three-way proportional valve are controlled to be maximum, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0042] Furthermore, the heating control module is used to:

[0043] controlling the second electronic expansion valve of the heating sub-circuit and the second full-pass cut-off valve of the heating sub-circuit to be turned on, and controlling the first electronic expansion valve of the refrigerating sub-circuit and the first full-pass cut-off valve of the refrigerating sub-circuit to be turned off, so that the heating sub-circuit operates.

[0044] Further, the refrigeration control module is used for:

[0045] controlling the first electronic expansion valve of the refrigerating sub-circuit and the first full-pass cut-off valve of the refrigerating sub-circuit to be turned on, and controlling the second electronic expansion valve of the heating sub-circuit and the second full-pass cut-off valve of the heating sub-circuit to be turned off, so that the refrigerating sub-circuit operates.

[0046] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform a heat recovery method as provided in the second aspect.

[0047] In a fifth aspect, the present application provides a computer program product, comprising computer instructions executed by a processor to implement a heat recovery method as provided in the second aspect.

[0048] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0049] In the embodiments of the present application, the target operating state of the air conditioning circuit is obtained; when the target operating state is a refrigeration state, the refrigerating sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve is closed, and the radiator is controlled to operate in a heat dissipation mode; when the target operating state is a heating state, the heating sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve is controlled to be in communication with the first port, so that the engine oil in the second sub-circuit flows into the first sub-circuit. It can be seen that, in the embodiments of the present application, the oil-cooled heat exchanger is used to realize heat exchange between the air conditioning circuit and the engine oil heat dissipation circuit, the heat of the engine oil is recovered in the heating state, the energy consumption of the air conditioning equipment using the vehicle-mounted power supply is reduced, the heat recovery rate of the engine oil is improved, that is, the utilization rate of the heat generated by the engine oil during operation is improved, the effective utilization of the engine oil waste heat is realized, the heating comfort of the passenger compartment is improved, the vehicle power consumption is reduced, and the cruising range of the vehicle at low temperature is improved. In the refrigeration state, the influence of the heat of the engine oil on the refrigeration of the air conditioning circuit is reduced, the energy consumption of the air conditioning equipment using the vehicle-mounted power supply is reduced as much as possible, and the cruising time of the vehicle-mounted power supply is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 A schematic structural diagram of a heat recovery system provided in an embodiment of the present application;

[0052] Figure 2 A schematic flow chart of a heat recovery method provided in an embodiment of the present application;

[0053] Figure 3 A schematic structural diagram of a heat recovery device provided in an embodiment of the present application.

[0054] Reference numerals:

[0055] 1-Gas-liquid separation tank, 2-Compressor, 3-First full-way stop valve, 4-Evaporator, 5-In-vehicle condenser, 6-First electronic expansion valve, 7-Second electronic expansion valve, 8-Second full-way stop valve, 9-Oil-cooling heat exchanger, 10-Second oil pump, 11-Radiator, 12-First three-way proportional valve, 13-Engine oil circuit, 14-First oil pump, 15-Second three-way proportional valve, 16-Pressure check valve, 17-Oil pan. DETAILED DESCRIPTION

[0056] The embodiment of the present application solves the technical problem in the prior art that heat in the oil circuit is directly dissipated, resulting in low heat utilization rate, by providing a heat recovery method.

[0057] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0058] The embodiment of the present application obtains the target operating state of the air conditioning circuit; when the target operating state is cooling, controls the cooling sub-circuit and the first sub-circuit to operate, closes the third port of the first three-way proportional valve 12, and controls the radiator 11 to operate in the heat dissipation mode; when the target operating state is heating, controls the heating sub-circuit and the first sub-circuit to operate, and controls the third port of the first three-way proportional valve 12 to be conductive with the first port, so that the oil in the second sub-circuit flows into the first sub-circuit. It can be seen that the embodiment of the present application realizes heat exchange between the air conditioning circuit and the oil heat dissipation circuit through the oil-cooling heat exchanger 9, recovers the heat of the oil in the heating state, thereby reducing the energy consumption of the air conditioning equipment using the vehicle power supply, improving the heat recovery rate of the oil, that is, improving the utilization rate of the heat generated by the oil during operation, realizing the effective utilization of the waste heat of the oil, improving the heating comfort of the passenger compartment, reducing the power consumption of the entire vehicle, and thus improving the cruising range of the vehicle in low temperatures. In the cooling state, reduce the impact of the heat of the engine oil on the cooling of the air-conditioning circuit, minimize the energy consumption of the air-conditioning equipment using the on-board power supply, and extend the life of the on-board power supply.

[0059] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0060] First, the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0061] The present application provides an embodiment of Figure 1 A heat recovery system is shown, the system includes a controller (not shown) Figure 1 ), an air-conditioning circuit and an oil cooling circuit, heat exchange is performed between the air-conditioning circuit and the oil cooling circuit through an oil cooling heat exchanger 9; the air-conditioning circuit includes a cooling sub-circuit and a heating sub-circuit; the oil cooling circuit includes a first sub-circuit and a second sub-circuit for circulation of engine oil.

[0062] The gas-liquid separation tank 1, compressor 2, first full-pass stop valve 3, oil-cooled heat exchanger 9, first electronic expansion valve 6, evaporator 4, and gas-liquid separation tank 1 of the air-conditioning circuit are connected in sequence to form a refrigeration sub-circuit.

[0063] The air-liquid separation tank 1, compressor 2, in-vehicle condenser 5, second electronic expansion valve 7, oil-cooled heat exchanger 9, second full-pass stop valve 8, and air-liquid separation tank 1 of the air-conditioning circuit are connected in sequence to form a heating sub-circuit.

[0064] The radiator 11, oil cooling heat exchanger 9, second oil pump 10, first port of second three-way proportional valve 15, second port of second three-way proportional valve 15 and radiator 11 of the oil cooling circuit are connected in sequence to form a first sub-circuit.

[0065] The first oil pump 14 of the oil cooling circuit, the engine oil circuit 13, the first port of the first three-way proportional valve 12, the second port of the first three-way proportional valve 12, the oil pan 17, and the first oil pump 14 are connected in sequence to form a second sub-circuit.

[0066] The third port of the second three-way proportional valve 15 is connected to the oil pan 17 via a pressure check valve 16. This pressure check valve 16 opens from the third port of the second three-way proportional valve 15 to the oil pan 17. This check valve 16 opens only under a certain pressure and provides a one-way flow, ensuring that the first sub-circuit is always filled with oil and preventing it from flowing back into the oil pan 17 due to gravity. The first oil pump 14 is linked to the engine, and the second three-way proportional valve 15 defaults to connecting its first and second ports.

[0067] The third port of the first three-way proportional valve 12 is connected to the passage connecting the radiator 11 and the second three-way proportional valve 15 .

[0068] In actual operation, in addition to the above-mentioned circuits and related equipment, some sensors are also set up. For example Figure 1 The corresponding pressure and temperature sensors PT1 and PT2, and the temperature sensors T1 and T2 for measuring the temperature of the oil cooling circuit. The relevant sensors can be set according to actual conditions, and the embodiment of the present application does not limit this.

[0069] The controller is electrically connected to the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit respectively, and is used to control the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit to be turned on or off respectively.

[0070] Specifically, the controller is electrically connected to the following devices respectively:

[0071] Electronic control components such as the first full-way stop valve 3, the second full-way stop valve 8, the first electronic expansion valve 6, the second electronic expansion valve 7, the radiator 11, the first oil pump 14, the second oil pump 10, the second three-way proportional valve 15, the first three-way proportional valve 12, PT1, PT2, T1 and T2.

[0072] The embodiment of the present application couples the air conditioning circuit and the oil cooling circuit through the oil cooling heat exchanger 9, so that the air conditioning circuit can recover the heat of the oil cooling circuit in the heating state, thereby improving the heat utilization rate of the oil circuit, reducing vehicle energy consumption, and extending the vehicle driving mileage.

[0073] Based on the same inventive concept, the present application provides the following embodiments: Figure 2 A heat recovery method shown is applied to a heat recovery system as provided above, specifically to a controller of a heat recovery system, and the method includes steps S21 to S23.

[0074] Step S21, obtaining the target operating state of the air conditioning circuit;

[0075] Step S22: When the target operating state is the cooling state, the cooling sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve 12 is closed to control the radiator 11 to operate in the heat dissipation mode;

[0076] Step S23, when the target operating state is the heating state, the heating sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve 12 is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0077] A heat recovery method provided in an embodiment of the present application can be executed by an on-board controller of a vehicle where the air-conditioning circuit is located, or can be executed by an air-conditioning controller corresponding to the air-conditioning circuit. The embodiment of the present application only takes the air-conditioning controller as the execution body for subsequent explanation.

[0078] Regarding step S21 , the target operating state of the air-conditioning circuit is acquired.

[0079] The operating state of the air conditioning circuit includes an operating state and a non-operating state, wherein the operating state includes a cooling state and a heating state. The state identifier corresponding to the air conditioning circuit can be read and the operating state of the air conditioning circuit can be determined based on the state identifier.

[0080] When the target operating state is non-operating, heat in the oil circuit can only be lost. Therefore, the first and third ports of the first three-way proportional valve 12 can be controlled to be conductive. When the first and third ports of the first three-way proportional valve 12 are conductive, heat dissipation from the radiator 11 in the first sub-circuit can be controlled, improving the heat dissipation effect of the engine oil circuit 13 and ensuring that the engine oil circuit 13 operates at an appropriate temperature.

[0081] When the target operating state is the cooling state, step S22 may be continued to be executed. When the target operating state is the heating state, step S23 may be continued to be executed.

[0082] Regarding step S22 , when the target operating state is the cooling state, the cooling sub-circuit and the first sub-circuit are controlled to operate, and the third port of the first three-way proportional valve 12 is closed to control the radiator 11 to operate in the heat dissipation mode.

[0083] When the target operating state is the cooling state, it means that the heat of the oil circuit can only be lost.

[0084] Control the operation of the refrigeration sub-circuit, combined with Figure 1 As shown, specifically, the first electronic expansion valve 6 and the first full-pass stop valve 3 are controlled to be turned on, and the second electronic expansion valve 7 and the second full-pass stop valve 8 are controlled to be turned off, so that the refrigeration sub-circuit operates.

[0085] On this basis, the first sub-circuit is controlled to operate in heat dissipation mode, specifically controlling the radiator 11 to dissipate the heat in the oil circuit to the outside, that is, to operate in heat dissipation mode. The radiator 11 can be adjusted to operate in heat dissipation mode or heat absorption mode by changing the rotation direction of the fan.

[0086] The oil heat exchanger 9 absorbs the heat from the vehicle passenger compartment, and then dissipates the heat when the radiator 11 of the first sub-circuit dissipates the heat, which can reduce the energy consumption of the air conditioning circuit on the entire vehicle to a certain extent.

[0087] In addition, it is also necessary to close the third port of the first three-way proportional valve 12 to prevent the heat of the engine oil circuit 13 from flowing into the first sub-circuit through the third port, thereby preventing the temperature of the oil heat exchanger 9 from rising, and further preventing the air-conditioning circuit from using more energy to cool the oil circuit, which can to a certain extent avoid the increase in energy consumption of the air-conditioning circuit for the entire vehicle.

[0088] Regarding step S23, when the target operating state is the heating state, the heating sub-circuit and the first sub-circuit are controlled to operate, and the third port and the first port of the first three-way proportional valve 12 are controlled to be connected, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0089] When the target operating state is the heating state, the heat of the oil circuit can be recovered and utilized.

[0090] The operation of the heating sub-circuit is controlled, specifically, the second electronic expansion valve 7 and the second full-pass stop valve 8 are controlled to be turned on, and the first electronic expansion valve 6 and the first full-pass stop valve 3 are controlled to be turned off, so that the heating sub-circuit is operated.

[0091] Controlling the operation of the first sub-circuit specifically controls the second oil pump 10 to drive the oil in the pipeline. The state of the radiator 11 can be determined based on the heat level (i.e., temperature) of the engine oil circuit 13 and the target heating temperature of the air conditioning circuit.

[0092] By controlling the connection between the third port and the first port of the first three-way proportional valve 12, the oil in the second sub-circuit can flow into the first sub-circuit, transferring heat from the engine oil circuit 13 to the first sub-circuit. The degree of opening of the connection between the third port and the first port of the first three-way proportional valve 12 can be determined based on the heat level (i.e., temperature) of the engine oil circuit 13 and the target heating temperature of the air conditioning circuit.

[0093] Furthermore, when the target operating state is a heating state, the method further includes:

[0094] Step S231, when the target operating state is the heating state, monitoring the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit;

[0095] Step S232: When the actual operating temperature is less than or equal to a first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in a heat absorption mode, the third port and the first port of the first three-way proportional valve 12 are controlled to be closed, and the first heating power of the heating sub-circuit is determined according to the actual space temperature of the passenger compartment space corresponding to the heating sub-circuit and the target heating temperature; the first preset threshold is less than the target heating temperature;

[0096] Step S233, when the actual operating temperature is greater than the first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in the heat absorption mode, the third port of the first three-way proportional valve 12 is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit, and the second heating power of the heating sub-circuit is determined according to the actual space temperature, the actual operating temperature and the target heating temperature.

[0097] Regarding step S231, the target heating temperature is set by the user and is the temperature that the user wants the passenger compartment space to eventually reach. The actual operating temperature is the actual temperature of the oil cooling circuit, which can be specifically Figure 1 The target heating temperature is changed according to the user's adjustment, and the target heating temperature is updated after the user's adjustment of the target heating temperature is detected.

[0098] When the target operating state is heating, the relationship between the actual operating temperature and a first preset threshold is determined. The first preset threshold is used to determine whether oil heat recovery is necessary and can be set based on actual needs, for example, 25°C. If the actual operating temperature is less than or equal to the first preset threshold, step S232 is executed. If the actual operating temperature is greater than the first preset threshold, step S233 is executed.

[0099] Regarding step S232, when the actual operating temperature is less than or equal to the first preset threshold, it means that the heat in the oil circuit cannot be recovered. The embodiment of the present application controls the radiator 11 to operate in the heat absorption mode to provide a small amount of heat to the oil-cooling heat exchanger 9 through the radiator 11, thereby reducing the energy consumption of the air-conditioning circuit heating to a certain extent. The third port and the first port of the first three-way proportional valve 12 are controlled to be closed to prevent the low-temperature oil in the engine oil circuit 13 from flowing into the first sub-circuit, thereby preventing the oil in the second sub-circuit from absorbing heat from the first sub-circuit and the air-conditioning circuit, thereby avoiding the energy consumption of the entire vehicle by the air-conditioning circuit heating.

[0100] Since heat cannot be recovered from the engine oil circuit 13 , the heating sub-circuit needs to determine the heating power based on the actual space temperature of the passenger compartment space and the target heating temperature.

[0101] Regarding step S233, when the actual operating temperature is greater than the first preset threshold, it means that the heat of the engine oil circuit 13 can be recovered. On the basis of controlling the operation of the heating sub-circuit, the operation of the first sub-circuit is controlled, and the first port and the third port of the first three-way proportional valve 12 are controlled to be conductive, so that the oil in the second sub-circuit can flow into the first sub-circuit, and the heat of the oil can be brought to the oil-cooling heat exchanger 9, providing heat for the air-conditioning circuit, reducing the energy consumption of the entire vehicle by the air-conditioning circuit heating, and improving the utilization rate of the heat of the oil circuit.

[0102] The radiator 11 can also be controlled to operate in a heat absorption mode to provide a small amount of heat to the oil cooling heat exchanger 9 through the radiator 11, thereby reducing the energy consumption of the entire vehicle by the air conditioning circuit heating to a certain extent.

[0103] In this case, the air-conditioning circuit can determine the heating power of the heating sub-circuit based on the actual space temperature, the actual operating temperature and the target heating temperature to meet the user's heating needs for the passenger compartment.

[0104] Furthermore, when the target operating state is the heating state, after monitoring the target heating temperature corresponding to the air-conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit, the method further includes steps S234 and S235.

[0105] Step S234: When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, and a first opening of the third port and the first port of the first three-way proportional valve 12 is determined based on the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0106] Step S235, when the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to the second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in the heat absorption mode, and the second opening degree of the third port and the first port of the first three-way proportional valve 12 is determined according to the difference between the actual operating temperature and the target heating temperature, so that the engine oil in the second sub-circuit flows into the first sub-circuit.

[0107] Regarding step S234, when the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than the second preset threshold, it means that the heat of the engine oil circuit is sufficient, and the heating sub-circuit and the first sub-circuit can be controlled to operate.

[0108] On this basis, the first opening degree of the third port and the first port of the first three-way proportional valve 12 can be determined according to the difference between the actual operating temperature and the target heating temperature, and then the flow of the engine oil in the second sub-circuit to the first sub-circuit is controlled.

[0109] When the temperature difference is large, the engine oil heat in the second sub-circuit is mainly used as the energy source for heating of the air conditioning circuit, and the higher the use rate of the heat in the second sub-circuit, the smaller the energy consumption of the air conditioning circuit of the whole vehicle. Therefore, the first opening degree needs to be as large as possible.

[0110] Regarding step S235, when the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to the second preset threshold, it means that the heat of the engine oil circuit is not sufficient, and on the basis of controlling the heating sub-circuit and the first sub-circuit to operate, the radiator 11 can be controlled to operate in the heat absorption mode to provide a small amount of heat for the oil cooling heat exchanger 9 through the radiator 11, thereby reducing the energy consumption of the air conditioning circuit for heating of the whole vehicle to a certain extent.

[0111] On this basis, the second opening degree of the third port and the first port of the first three-way proportional valve 12 can be determined according to the difference between the actual operating temperature and the target heating temperature, so that the engine oil in the second sub-circuit flows into the first sub-circuit, and then the flow of the engine oil in the second sub-circuit to the first sub-circuit is controlled.

[0112] When the temperature difference is large, the engine oil heat in the second sub-circuit is mainly used as the energy source for heating of the air conditioning circuit, and the higher the use rate of the heat in the second sub-circuit, the smaller the energy consumption of the air conditioning circuit of the whole vehicle. Therefore, the second opening degree needs to be as large as possible.

[0113] Furthermore, when the actual operating temperature is greater than a first preset threshold and less than or equal to the target heating temperature, the heating sub-circuit and the first sub-circuit are controlled to operate, radiator 11 is controlled to operate in heat absorption mode, and the third port and the first port of the first three-way proportional valve 12 are controlled to be open to the maximum, allowing the oil in the second sub-circuit to flow into the first sub-circuit. Controlling the third port and the first port of the first three-way proportional valve 12 to be open to the maximum allows the oil in the second sub-circuit to flow into the first sub-circuit. Controlling the third port and the first port of the first three-way proportional valve 12 to be open to the maximum allows the oil in the second sub-circuit to be utilized to the maximum extent, thereby improving the heat recovery rate.

[0114] In summary, the embodiment of the present application obtains the target operating state of the air conditioning circuit; when the target operating state is the cooling state, controls the cooling sub-circuit and the first sub-circuit to operate, closes the third port of the first three-way proportional valve 12, and controls the radiator 11 to operate in the heat dissipation mode; when the target operating state is the heating state, controls the heating sub-circuit and the first sub-circuit to operate, and controls the third port of the first three-way proportional valve 12 to be conductive with the first port, so that the oil in the second sub-circuit flows into the first sub-circuit. It can be seen that the embodiment of the present application realizes heat exchange between the air conditioning circuit and the oil heat dissipation circuit through the oil-cooling heat exchanger 9, recovers the heat of the oil in the heating state, thereby reducing the energy consumption of the air conditioning equipment using the vehicle power supply, improving the heat recovery rate of the oil, that is, improving the utilization rate of the heat generated by the oil during operation, realizing the effective utilization of the waste heat of the oil, improving the heating comfort of the passenger compartment, reducing the power consumption of the entire vehicle, and thus improving the cruising range of the vehicle in low temperatures. In the cooling state, reduce the impact of the heat of the engine oil on the cooling of the air-conditioning circuit, minimize the energy consumption of the air-conditioning equipment using the on-board power supply, and extend the life of the on-board power supply.

[0115] Based on the same inventive concept, the present application provides the following embodiments: Figure 3 A heat recovery device shown is applied to a heat recovery system as provided above, and the device includes:

[0116] A state acquisition module 31 is used to obtain the target operating state of the air conditioning circuit;

[0117] The cooling control module 32 is configured to control the cooling sub-circuit and the first sub-circuit to operate when the target operating state is the cooling state, and to close the third port of the first three-way proportional valve 12 to control the radiator 11 to operate in the cooling mode;

[0118] The heating control module 33 is used to control the operation of the heating sub-circuit and the first sub-circuit when the target operating state is the heating state, and to control the third port of the first three-way proportional valve 12 to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0119] Furthermore, the heating control module 33 is used to:

[0120] When the target operating state is heating, the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit are monitored;

[0121] When the actual operating temperature is less than or equal to a first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in a heat absorption mode, the third port and the first port of the first three-way proportional valve 12 are controlled to be closed, and the first heating power of the heating sub-circuit is determined according to the actual space temperature of the passenger compartment space corresponding to the heating sub-circuit and the target heating temperature; the first preset threshold is less than the target heating temperature;

[0122] When the actual operating temperature is greater than the first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in the heat absorption mode, the third port of the first three-way proportional valve 12 is controlled to be connected to the first port, so that the oil in the second sub-circuit flows into the first sub-circuit, and the second heating power of the heating sub-circuit is determined according to the actual space temperature, the actual operating temperature and the target heating temperature.

[0123] Furthermore, the heating control module 33 is used to:

[0124] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than a second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, and a first opening degree of the first three-way proportional valve 12 is determined to connect the third port to the first port based on the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit;

[0125] When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to the second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in the heat absorption mode, and the second opening of the third port and the first port of the first three-way proportional valve 12 is determined according to the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0126] Furthermore, the heating control module 33 is used to:

[0127] When the actual operating temperature is greater than the first preset threshold and the actual operating temperature is less than or equal to the target heating temperature, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator 11 is controlled to operate in the heat absorption mode, and the openings of the third port and the first port of the first three-way proportional valve 12 are controlled to be maximum, so that the oil in the second sub-circuit flows into the first sub-circuit.

[0128] Furthermore, the heating control module 33 is used to:

[0129] The second electronic expansion valve 7 of the heating sub-circuit and the second full-pass cut-off valve 8 of the heating sub-circuit are turned on, the first electronic expansion valve 6 of the refrigerating sub-circuit and the first full-pass cut-off valve 3 of the refrigerating sub-circuit are turned off, so that the heating sub-circuit operates.

[0130] Further, the refrigerating control module 32 is used for:

[0131] The first electronic expansion valve 6 of the refrigerating sub-circuit and the first full-pass cut-off valve 3 of the refrigerating sub-circuit are turned on, the second electronic expansion valve 7 of the heating sub-circuit and the second full-pass cut-off valve 8 of the heating sub-circuit are turned off, so that the refrigerating sub-circuit operates.

[0132] Based on the same inventive concept, the embodiment of the present application provides a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute a heat recovery method.

[0133] Based on the same inventive concept, the embodiment of the present application provides a computer program product, including computer instructions executed by a processor to implement a heat recovery method provided in the second aspect.

[0134] Since the electronic device introduced in the embodiment of the present application is the electronic device used to implement the method of information processing in the embodiment of the present application, based on the method of information processing introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation of the electronic device of the embodiment of the present application and its various forms, so here the electronic device how to implement the method in the embodiment of the present application is not introduced in detail. As long as the electronic device used to implement the method of information processing in the embodiment of the present application is used by those skilled in the art, it belongs to the scope of the present application.

[0135] Those skilled in the art will appreciate that embodiments of the application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0136] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0137] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0138] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0139] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0140] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A heat recovery system, characterized in that: The system includes a controller, an air conditioning circuit and an oil cooling circuit, wherein heat exchange is performed between the air conditioning circuit and the oil cooling circuit via an oil cooling heat exchanger; The air conditioning circuit includes a cooling sub-circuit and a heating sub-circuit; The oil cooling circuit includes a first sub-circuit and a second sub-circuit for circulation of engine oil; The first sub-circuit includes a radiator, the oil-cooling heat exchanger, a second oil pump, a first port of a second three-way proportional valve, a second port of the second three-way proportional valve, and the radiator, which are connected in sequence; The third port of the second three-way proportional valve is connected to the oil pan of the second sub-circuit through a pressure check valve, and the pressure check valve is connected to the oil pan from the third port of the second three-way proportional valve; The third port of the first three-way proportional valve of the second sub-circuit is connected to the channel connecting the radiator and the second three-way proportional valve; The controller is electrically connected to the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit respectively, and is used to control the cooling sub-circuit, the heating sub-circuit, the first sub-circuit and the second sub-circuit to be turned on or off respectively.

2. A heat recovery method, characterized in that: Applied to a heat recovery system according to claim 1, the method comprises: obtaining a target operating state of the air conditioning circuit; When the target operating state is the cooling state, controlling the cooling sub-circuit and the first sub-circuit to operate, and closing the third port of the first three-way proportional valve to control the radiator to operate in the heat dissipation mode; When the target operating state is the heating state, the heating sub-circuit and the first sub-circuit are controlled to operate, and the third port and the first port of the first three-way proportional valve are controlled to be connected, so that the oil in the second sub-circuit flows into the first sub-circuit.

3. The method according to claim 2, wherein When the target operating state is a heating state, the method further includes: When the target operating state is a heating state, monitoring the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit; When the actual operating temperature is less than or equal to a first preset threshold, controlling the heating sub-circuit and the first sub-circuit to operate, controlling the radiator to operate in a heat absorption mode, controlling the third port and the first port of the first three-way proportional valve to be closed, and determining a first heating power of the heating sub-circuit according to an actual space temperature of the passenger compartment space corresponding to the heating sub-circuit and the target heating temperature; the first preset threshold is less than the target heating temperature; When the actual operating temperature is greater than the first preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in a heat absorption mode, the third port and the first port of the first three-way proportional valve are controlled to be connected so that the oil in the second sub-circuit flows into the first sub-circuit, and the second heating power of the heating sub-circuit is determined according to the actual space temperature, the actual operating temperature, and the target heating temperature.

4. The method according to claim 3, wherein When the target operating state is a heating state, after monitoring the target heating temperature corresponding to the air conditioning circuit and the actual operating temperature corresponding to the oil cooling circuit, the method further includes: When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is greater than a second preset threshold, controlling the heating sub-circuit and the first sub-circuit to operate, and determining a first opening degree of the first three-way proportional valve so as to connect the third port to the first port according to the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit; When the actual operating temperature is greater than the target heating temperature, and the difference between the actual operating temperature and the target heating temperature is less than or equal to the second preset threshold, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in a heat absorption mode, and a second opening degree of the first three-way proportional valve, which connects the third port to the first port, is determined according to the difference between the actual operating temperature and the target heating temperature, so that the oil in the second sub-circuit flows into the first sub-circuit.

5. The method according to claim 3, wherein When the actual operating temperature is greater than the first preset threshold, controlling the heating sub-circuit and the first sub-circuit to operate includes: When the actual operating temperature is greater than the first preset threshold and less than or equal to the target heating temperature, the heating sub-circuit and the first sub-circuit are controlled to operate, the radiator is controlled to operate in a heat absorption mode, and the openings of the third port and the first port of the first three-way proportional valve are controlled to be maximum, so that the oil in the second sub-circuit flows into the first sub-circuit.

6. The method according to any one of claims 2 to 5, wherein: Controlling the operation of the heating sub-circuit includes: The second electronic expansion valve of the heating sub-circuit and the second full-pass stop valve of the heating sub-circuit are controlled to be turned on, and the first electronic expansion valve of the cooling sub-circuit and the first full-pass stop valve of the cooling sub-circuit are controlled to be closed, so that the heating sub-circuit is in operation.

7. The method according to claim 2, wherein Controlling the operation of the refrigeration sub-circuit includes: The first electronic expansion valve and the first full-pass stop valve of the refrigeration sub-circuit are controlled to be turned on, and the second electronic expansion valve and the second full-pass stop valve of the heating sub-circuit are controlled to be closed, so that the refrigeration sub-circuit is in operation.

8. A heat recovery device, characterized in that: Applied to a heat recovery system as claimed in claim 1, the device comprises: A state acquisition module, configured to acquire a target operating state of the air-conditioning circuit; a refrigeration control module, configured to, when the target operating state is the refrigeration state, control the refrigeration sub-circuit and the first sub-circuit to operate, and close the third port of the first three-way proportional valve to control the radiator to operate in a heat dissipation mode; a heating control module configured to control the operation of the heating sub-circuit and the first sub-circuit when the target operating state is the heating state, and to control the third port of the first three-way proportional valve to be connected to the first port so that the oil in the second sub-circuit flows into the first sub-circuit. 9 . A non-transitory computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to implement a heat recovery method according to claim 2 .

10. A computer program product, characterized in that The method comprises computer instructions, wherein the computer instructions are executed by a processor to implement a heat recovery method according to any one of claims 2 to 7.

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