A co2 heat pump system waste heat recovery method, device, medium and equipment

Abstract

The application belongs to the technical field of automobile air conditioning adjustment, and provides a CO2 heat pump system waste heat recovery method, device, medium and equipment, comprising: obtaining a plurality of target air outlet temperatures, and adjusting the valve in the CO2 heat pump system to achieve an air source heat pump operation mode or a waste heat recovery mode; in the air source heat pump operation mode, the duty cycle of the cooling fan, the speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures, and the energy consumption of electrical devices under different working conditions is recorded; in the waste heat recovery mode, the duty cycle of the electronic water pump, the speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures, and the energy consumption of electrical devices under different working conditions is recorded; by comparing the energy consumption of electrical devices in the air source heat pump operation mode and the water source heat pump operation mode, the optimal operation mode under different target air outlet temperatures is selected. The optimal COP can be achieved, and the endurance of new energy electric vehicles is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile air conditioning adjustment, and particularly relates to a CO2 heat pump system waste heat recovery method, device, medium and equipment. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] New energy electric vehicles are also increasing in the market, and there has always been anxiety about the endurance of electric vehicles, especially in low temperature environments. The heating of the passenger compartment and the battery will consume most of the power, and relevant heat pump thermal management solutions are emerging.

[0004] For the CO2 heat pump system, the waste heat recovery of the motor electric control loop is beneficial to the reduction of energy consumption, but there is no relevant research on what conditions to use waste heat recovery. SUMMARY

[0005] In order to solve the technical problems existing in the background art, the application provides a CO2 heat pump system waste heat recovery method, device, medium and equipment, which adjusts the valve in the CO2 heat pump system to achieve the operating mode, adjusts the EDC speed, FAN duty ratio, PUMP duty ratio and HVAC blower duty ratio to achieve the target state, compares the energy consumption of each electrical device in the air source heat pump and waste heat recovery mode operation process, and selects the optimal mode. The best COP can be achieved to improve the endurance of new energy electric vehicles.

[0006] In order to achieve the above purpose, the application adopts the following technical solutions:

[0007] The first aspect of the application provides a CO2 heat pump system waste heat recovery method.

[0008] A CO2 heat pump system waste heat recovery method, comprising:

[0009] Obtain a plurality of target air outlet temperatures, and adjust the valve in the CO2 heat pump system to achieve an air source heat pump operating mode or a waste heat recovery mode;

[0010] In the air source heat pump operating mode, the duty ratio of the cooling fan, the speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures, and the energy consumption of electrical devices under different working conditions is recorded;

[0011] In the waste heat recovery mode, the duty ratio of the electronic water pump, the speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures, and the energy consumption of electrical devices under different working conditions is recorded;

[0012] The optimal operation mode under different target air outlet temperatures is selected by comparing the electrical device energy consumption in the air source heat pump operation mode and the water source heat pump operation mode.

[0013] Further, in the air source heat pump operation mode, the duty cycles of the cooling fans and the corresponding vehicle inlet air speeds under different vehicle speeds are determined; the vehicle inlet air speed is taken as the bench inlet air speed, the duty cycles of the cooling fans are adjusted, and the energy consumption of the cooling fans under different duty cycles is recorded; the rotational speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures under different external temperatures, and the energy consumption of the electric compressor is recorded.

[0014] Further, in the air source heat pump operation mode, the electrical device energy consumption is the sum of the energy consumption of the cooling fans and the energy consumption of the electric compressor.

[0015] Further, in the waste heat recovery mode, the duty cycles of the electronic water pumps and the water flow of the motor electronic control circuit under different duty cycles are determined; the water flow is taken as the bench water flow, the duty cycles of the electronic water pumps are adjusted, and the energy consumption of the electronic water pumps under different duty cycles is recorded; the rotational speed of the electric compressor and the valve opening degree are adjusted to achieve different target air outlet temperatures under different external temperatures and different water temperatures, and the energy consumption of the electric compressor is recorded.

[0016] Further, in the waste heat recovery mode, the electrical device energy consumption is the sum of the energy consumption of the electronic water pumps and the energy consumption of the electric compressor.

[0017] The second aspect of the present application provides a CO2 heat pump system waste heat recovery device.

[0018] A CO2 heat pump system waste heat recovery device comprises:

[0019] A mode changing module configured to obtain a plurality of target air outlet temperatures and adjust the valve in the CO2 heat pump system to achieve an air source heat pump operation mode or a waste heat recovery mode;

[0020] A first energy consumption calculation module configured to, in the air source heat pump operation mode, adjust the duty cycles of the cooling fans, the rotational speed of the electric compressor and the valve opening degree to achieve different target air outlet temperatures, and record the electrical device energy consumption under different working conditions;

[0021] A second energy consumption calculation module configured to, in the waste heat recovery mode, adjust the duty cycles of the electronic water pumps, the rotational speed of the electric compressor and the valve opening degree to achieve different target air outlet temperatures, and record the electrical device energy consumption under different working conditions;

[0022] An energy consumption comparison module configured to select the optimal operation mode under different target air outlet temperatures by comparing the electrical device energy consumption in the air source heat pump operation mode and the water source heat pump operation mode.

[0023] Further, the first energy consumption calculation module is specifically configured to: in the air source heat pump operation mode, determine the duty cycles of the cooling fans and the corresponding whole vehicle air inlet wind speed at different vehicle speeds; take the whole vehicle air inlet wind speed as a test bench air inlet wind speed, adjust the duty cycles of the cooling fans, and record the energy consumption of the cooling fans at different duty cycles; and adjust the electric compressor speed and valve opening degree to achieve different target air outlet temperatures at different external temperatures, and record the electric compressor energy consumption.

[0024] Further, the second energy consumption calculation module is specifically configured to: in the waste heat recovery mode, determine the duty cycles of the electronic water pumps and the water flow of the motor electric control circuit at different duty cycles; take the water flow as a test bench water inlet flow, adjust the duty cycles of the electronic water pumps, and record the energy consumption of the electronic water pumps at different duty cycles; and adjust the electric compressor speed and valve opening degree to achieve different target air outlet temperatures at different external temperatures and different water temperatures, and record the electric compressor energy consumption.

[0025] The third aspect of the application provides a computer readable storage medium.

[0026] A computer readable storage medium, which stores a computer program, the program being executed by a processor to implement the steps in the CO2 heat pump system waste heat recovery method according to the first aspect.

[0027] The fourth aspect of the application provides a computer device.

[0028] A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps in the CO2 heat pump system waste heat recovery method according to the first aspect when executing the program.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] The application adjusts the valve in the CO2 heat pump system to achieve the operation mode, adjusts the EDC speed, the FAN duty cycle, the PUMP duty cycle, and the HVAC blower duty cycle to achieve the target state, compares the energy consumption of each electrical device in the air source heat pump and the waste heat recovery mode, selects the optimal mode, and can achieve the best COP and improve the endurance of the new energy electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is a CO2 heat pump thermal management system principle diagram shown by embodiment one of the present application;

[0033] Figure 2 is an air source heat pump operation principle diagram shown by embodiment one of the present application;

[0034] Figure 3 is a water source heat pump (waste heat recovery) operation principle diagram shown by embodiment one of the present application;

[0035] Figure 4 is a structural schematic diagram of a computer device shown by embodiment four of the present application. DETAILED DESCRIPTION

[0036] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as would be understood by one of ordinary skill in the art to which the present application pertains.

[0038] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the term "comprising" and / or "including" is used in the specification, it means that the features, steps, operations, devices, components and / or combinations thereof are present.

[0039] It should be noted that the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the method and device according to various embodiments of the present application. It should be noted that each block in the flowchart or block diagram can represent a module, a program segment, or a part of code, which can include one or more executable instructions for implementing the logical functions defined in various embodiments. It should also be noted that in some alternative implementations, the functions indicated in the blocks can occur in an order different from that indicated in the drawings. For example, two blocks indicated in succession can actually be executed substantially in parallel, or they can sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the flowchart and / or block diagram, and the combination of blocks in the flowchart and / or block diagram, can be implemented using a dedicated hardware-based device that performs the specified functions or operations, or can be implemented using a combination of dedicated hardware and computer instructions.

[0040] Embodiment one

[0041] This embodiment provides a method for waste heat recovery from a CO2 heat pump system.

[0042] This embodiment provides a waste heat recovery method for a CO2 heat pump system, which clarifies the operating conditions for waste heat recovery, achieves the optimal COP value, saves on vehicle calibration conditions, and can be extended to similar heat pump systems with waste heat recovery functions.

[0043] This embodiment provides a waste heat recovery method for a CO2 heat pump system. By adjusting the SOV, EXV, and 3WV in the CO2 heat pump system to achieve the operating mode, and adjusting the EDC speed, FAN duty cycle, PUMP duty cycle, and HVAC blower duty cycle to achieve the target state, the energy consumption of various electrical components (EDC, FAN, PUMP, blower, etc.) during the operation of air source heat pumps and water source heat pumps (waste heat recovery) is compared to achieve the optimal COP and improve the range of new energy electric vehicles.

[0044] This embodiment provides a waste heat recovery method for a CO2 heat pump system, comprising the following steps:

[0045] Step 1: In the framework control of the CO2 heat pump system, in order to ensure that the compressor and power system operate normally within the boundary range, it is necessary to determine the highest discharge pressure, discharge temperature, lowest suction pressure and lowest operating temperature of the compressor and the motor. The control of each component must be within this range.

[0046] Step 2: Obtain the target outlet air temperature. Since the waste heat recovery method of the CO2 heat pump system provided in this embodiment is for heat pump mode, it is first necessary to determine the conditions for entering the CO2 heat pump system: Condition 1: 4℃ < outside temperature < 28℃ and outside temperature - target outlet air temperature < -10℃; Condition 2: outside temperature ≤ 4℃ and outside temperature - target outlet air temperature < -2℃; the determination of entering the waste heat recovery mode after satisfying either condition 1 or condition 2 is to proceed to step 3.

[0047] Among them, the target air outlet temperature refers to the target temperature of the air outlet of the vehicle's air conditioning system, which is mainly used to determine when the heat pump mode is activated.

[0048] Here, "outer temperature" refers to the ambient temperature, which corresponds to the ambient temperature of the condenser chamber (air intake of the front-end module) on the test bench.

[0049] Step 3: The calibration of the waste heat recovery method of the CO2 heat pump system provided in this embodiment requires stable operating conditions. Basic calibration work needs to be carried out on the test bench. The air source heat pump operating conditions and the water source heat pump operating conditions should keep the outside temperature and the target air outlet temperature consistent. The commonly used blower speed is set according to the comfort calibration model as the HVAC air volume on the test bench.

[0050] like Figure 1As shown, the CO2 heat pump system includes an air source heat pump and a water source heat pump, and the water source heat pump is used for waste heat recovery.

[0051] Wherein, the HVAC air volume corresponds to the duty cycle of the vehicle air conditioner blower, and different HVAC air volumes will cause changes in the operating state of system components. To achieve indoor comfort, the automatic air conditioner will PI regulate the duty cycle of the blower, and the final duty cycle of the blower will stabilize to a certain value, which is a set value of the system bench.

[0052] Step 4, by adjusting the valves in the CO2 heat pump system (including the refrigerant on-off valve SOV, the electronic expansion valve EXV, and the three-way cooling electromagnetic valve 3WV), the air source heat pump or water source heat pump operating mode is achieved.

[0053] Adjusting the SOV, EXV, and 3WV in the CO2 heat pump system specifically includes: for the air source heat pump, SOV1 is off, SOV2 is off, SOV3 is on, SOV is off, SOV5 is on, EXV1 is fully open, EXV2 is adjusted, EXV3 is off, and 3WV can not be controlled; for the water source heat pump, SOV1 is off, SOV2 is off, SOV3 is on, SOV is off, SOV5 is off, EXV1 is fully open, EXV2 is off, EXV3 is adjusted, and 3WV is connected.

[0054] Step 5, in the air source heat pump operating mode, first determine the different duty cycles of the FAN (cooling fan) and the corresponding vehicle inlet air speed at different vehicle speeds; the inlet air speed is used as the inlet air speed of the bench front-end module, the duty cycle of the cooling fan is adjusted, the energy consumption of the FAN at different duty cycles is determined; to achieve different target outlet air temperatures at different external temperatures, the speed of the electric compressor and the valve opening are adjusted, the opening of EXV2 and the speed of EDC (electric compressor) are determined to achieve different target outlet air temperatures at different external temperatures, and the energy consumption of EDC at different working conditions is recorded.

[0055] Wherein, the principle of the air source heat pump is as shown in Figure 2 As shown, the refrigerant side operating route of the air source heat pump is: EDC (electric compressor) → open SOV3 (third refrigerant on-off valve) → IGC (evaporator core) → adjustable EXV1 (first electronic expansion valve) → EVAP (evaporator core) → adjustable EXV2 (second electronic expansion valve) → A.D IHX (liquid storage drying bottle with heat recovery function) → GAS COOLER (external air cooler) → open SOV5 (fifth refrigerant on-off valve) → A.D IHX (liquid storage drying bottle with heat recovery function) → EDC (electric compressor).

[0056] Wherein, the FAN (cooling fan) is provided at the GAS COOLER (external air cooler). EVAP and GC form an HVAC (air conditioning box).

[0057] Specifically, for the air source heat pump, the commonly used duty ratio of the FAN and the corresponding air intake speed of the whole vehicle under different vehicle speeds are determined first, and the corresponding energy consumption of the FAN under different duty ratios is determined to form Table 1, and the air intake speed is used as the air intake speed of the bench front end module. The measured value shows that the adjustment of EXV2 is prior to the adjustment of EXV1 in the stable stage, so EXV2 (step) and the compressor speed are adjusted preferentially in the bench, and the preset values of EXV2 and EDC are formed under different external temperatures to achieve different target air outlet temperatures, as shown in Table 2, and the EDC energy consumption under different working conditions is recorded.

[0058] In Table 2, the air volume refers to the HVAC air volume on the bench.

[0059] The air intake speed refers to the air speed of the front end module of the whole vehicle under different vehicle speeds, and the purpose is to obtain the duty ratio of the fan under the corresponding air speed, and the fan energy consumption can be obtained from the single characteristic curve through the duty ratio signal, and the FAN energy consumption data of Table 1 is formed.

[0060] It should be noted that EXV1 plays a role of auxiliary throttling in the air source heat pump mode, and it is assumed that the double throttling effect of EXV1 and EXV2 will be better in the initial stage of system design. In the actual system calibration process, if EXV1 is fully opened and EXV2 is adjusted, an optimal opening can be obtained through the sweep point working condition of the opening of EXV2, and in the case of adjusting EXV1 and EXV2 at the same time, the optimal opening is not unique, which increases the control difficulty. In order to simplify the control model, the scheme of fully opening EXV1 and adjusting EXV2 is finally adopted.

[0061] Table 1, FAN energy consumption data

[0062]

[0063] Table 2, EXV2 and EDC preset values

[0064]

[0065] Step 6, in the water source heat pump operation mode (i.e., the waste heat recovery mode), the commonly used duty ratio of the PUMP and the water flow of the motor control circuit under the duty ratio are determined first; the water flow is used as the water inlet flow of the Chiller on the bench, the duty ratio of the electronic water pump is adjusted, and the energy consumption of the PUMP corresponding to different duty ratios is determined; the water temperature signal is used as the water inlet temperature of the Chiller, the motor compressor speed and the valve opening are adjusted under different external temperatures and different water temperatures to achieve different target air outlet temperatures, the EXV3 opening and the motor compressor speed are determined under different external temperatures and different water temperatures to achieve different target air outlet temperatures, and the EDC energy consumption under different working conditions is recorded.

[0066] The water temperature signal is detected by a water temperature sensor (T2) arranged in a motor loop on the test bench.

[0067] The water source heat pump principle is shown in the following figure: Figure 3 The refrigerant side operation route of the water source heat pump is: EDC (electric compressor)→open SOV3 (third refrigerant on-off valve)→IGC (internal gas cooler)→adjustable EXV1 (first electronic expansion valve)→EVAP (evaporator core)→adjustable EXV3 (third electronic expansion valve)→Chiller (battery cooler)→A.D IHX (liquid storage drying bottle with heat recovery function)→EDC.

[0068] The water side operation route of the water source heat pump is: PUMP (electronic water pump)→CDU (charger and high-low voltage inverter two-in-one)→Motor (drive motor)→3WV (three-way cooling electromagnetic valve, 1, 2 communication)→PUMP (electronic water pump).

[0069] The three-way cooling electromagnetic valve mainly adopts 1, 2 communication and 2, 3 communication.

[0070] The air source heat pump and the water source heat pump are provided with multiple PTs (temperature and pressure sensors) and Ts (water temperature sensors) on the operation route.

[0071] Specifically, for the water source heat pump, the commonly used duty ratio of the PUMP is determined, and the water flow of the motor electronic control loop under the duty ratio is determined, and the corresponding different energy consumption of the PUMP under different duty ratios is determined to form Table 3. The flow value is used as the water inlet flow of the Chiller on the test bench, and the water temperature signal T2 is used as the water inlet temperature of the Chiller. The measured values show that the adjustment of EXV3 is prior to the adjustment of EXV1 in the stable stage, so EXV3 (step) and the compressor speed are adjusted in priority in the test bench, and EXV3 and EDC preset values are formed to achieve different target air outlet temperatures under different ambient temperatures (environmental temperatures) and different water temperatures, as shown in Table 4. The EDC energy consumption under different working conditions is recorded.

[0072] It should be noted that in the use process of the real vehicle, passengers may set different air conditioning temperatures and blower positions (corresponding to HVAC air volume), or use the Auto function and set different air conditioning temperatures, and finally reach a stable blower position (corresponding to the HVAC air volume). The air volume in Table 4 refers to the HVAC air volume on the test bench.

[0073] The purpose of the water flow is to obtain the duty ratio of the water pump under the corresponding flow, and the water pump energy consumption can be obtained through the duty ratio signal from the single characteristic curve, that is, the PUMP energy consumption data in Table 3.

[0074] The waste heat recovery recovers the water side temperature, which is actually higher than the actual ambient temperature during motor operation. The heat varies under different working conditions, and the temperature change should be considered when corresponding to the bench. Therefore, ΔT is used in Table 4.

[0075] Table 3, PUMP energy consumption data

[0076]

[0077] Table 4, EXV3 and EDC preset values

[0078]

[0079] It should be noted that the two heat pump modes are actually adjusted by adjusting the switch of the valve in the system to make the refrigerant run in different circuits. Regardless of which mode is used, the HVAC fan duty cycle is quantitative, so it can be directly offset during energy consumption comparison.

[0080] It should be noted that the energy consumption of the blower is quantitative, and can be directly eliminated during energy consumption comparison. The energy consumption of the blower can be obtained from the single characteristic curve through the duty cycle signal.

[0081] Step 7, for air source heat pump and water source heat pump (waste heat recovery), to achieve the same target outlet air temperature, the energy consumption (EDC, FAN, blower energy consumption) of the air source heat pump and the energy consumption (waste heat recovery) of the water source heat pump (EDC, PUMP, blower energy consumption) form a MAP table. Under different external temperatures, different water temperatures and various conditions, the optimal operating mode under different target outlet air temperatures can be selected by comparing the energy consumption of the two modes (air source heat pump and water source heat pump).

[0082] The CO2 heat pump system waste heat recovery method provided by the embodiment can be applied to passenger cabin heat pump heating mode, battery heat pump heating mode, and passenger cabin and battery simultaneous heat pump heating mode, and can be popularized to other refrigerants and other heat pump principle architectures with the same function.

[0083] The CO2 heat pump system waste heat recovery method provided by the embodiment adjusts the SOV, EXV and 3WV in the CO2 heat pump system to achieve the operating mode, adjusts the EDC speed, FAN duty cycle, PUMP duty cycle, HVAC blower duty cycle to achieve the target state, compares the energy consumption of each electrical device (EDC, FAN, PUMP, blower, etc.) during the operation of the air source heat pump and the water source heat pump (waste heat recovery), and achieves the best COP to improve the endurance of new energy electric vehicles.

[0084] Embodiment two

[0085] The embodiment provides a CO2 heat pump system waste heat recovery device.

[0086] A CO2 heat pump system waste heat recovery device comprises:

[0087] A mode changing module is configured to acquire a plurality of target air outlet temperatures and adjust valves in the CO2 heat pump system to achieve an air source heat pump operation mode or a waste heat recovery mode.

[0088] A first energy consumption calculation module is configured to adjust duty cycles of cooling fans, rotation speeds of electric compressors and valve openings to achieve different target air outlet temperatures in the air source heat pump operation mode, and record energy consumptions of electric appliances under different working conditions.

[0089] A second energy consumption calculation module is configured to adjust duty cycles of electronic water pumps, rotation speeds of electric compressors and valve openings to achieve different target air outlet temperatures in the waste heat recovery mode, and record energy consumptions of electric appliances under different working conditions.

[0090] An energy consumption comparison module is configured to select optimal operation modes under different target air outlet temperatures by comparing energy consumptions of electric appliances in the air source heat pump operation mode and the water source heat pump operation mode.

[0091] The first energy consumption calculation module is specifically configured to determine duty cycles of a plurality of cooling fans and corresponding whole vehicle air inlet speeds under different vehicle speeds in the air source heat pump operation mode, take the whole vehicle air inlet speed as a bench air inlet speed, adjust the duty cycle of the cooling fan, record energy consumptions of the cooling fan under different duty cycles, and adjust rotation speeds of electric compressors and valve openings to achieve different target air outlet temperatures under different external temperatures and record energy consumptions of the electric compressors.

[0092] The second energy consumption calculation module is specifically configured to determine duty cycles of a plurality of electronic water pumps and waterway flow rates of motor electric control circuits under different duty cycles in the waste heat recovery mode, take the waterway flow rate as a bench water inlet flow rate, adjust the duty cycle of the electronic water pump, record energy consumptions of the electronic water pump under different duty cycles, and adjust rotation speeds of electric compressors and valve openings to achieve different target air outlet temperatures under different external temperatures and different water temperatures and record energy consumptions of the electric compressors.

[0093] It should be noted that the above embodiment provides a CO2 heat pump system waste heat recovery device, only the above-mentioned functional modules are divided into examples, in actual application, the above-mentioned function distribution can be completed by different functional modules according to the needs, that is, the internal structure of the electronic device is divided into different functional modules to complete all or part of the functions described above. In addition, the CO2 heat pump system waste heat recovery device and the CO2 heat pump system waste heat recovery method provided by the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0094] Embodiment three

[0095] The embodiment provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to realize the steps in the CO2 heat pump system waste heat recovery method according to the above embodiment one.

[0096] Embodiment four

[0097] The embodiment provides a computer device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the program to realize the steps in the CO2 heat pump system waste heat recovery method according to the above embodiment one.

[0098] Figure 4 The structure schematic diagram of the computer device provided by an example embodiment of the application is shown. The computer device comprises a processor and a memory.

[0099] The processor can include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor can be implemented in at least one of a hardware form of a DSP (Digital Signal Processing), an FPGA (Field Programmable Gate Array), a PLA (Programmable Logic Array). The processor can also include a main processor and a coprocessor, the main processor being a processor for processing data in an awake state, also referred to as a CPU (Central Processing Unit), and the coprocessor being a low-power processor for processing data in a standby state. In some embodiments, the processor can be integrated with a GPU (Graphics Processing Unit) for rendering and drawing content required to be displayed by the display screen. In some embodiments, the processor can further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

[0100] The memory can include one or more computer-readable storage media that can be non-transitory. The memory can also include a high-speed random access memory, and a nonvolatile memory such as one or more disk storage devices, flash storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory is used to store at least one computer program for being executed by the processor to implement the in-vehicle personnel detection method provided by the method embodiments in the present application.

[0101] Those skilled in the art can understand that the structure shown does not constitute a limitation on the computer device, and can include more or fewer components than those shown, or combine certain components, or adopt different component arrangements.

[0102] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A CO2 heat pump system waste heat recovery method, characterized by, The method comprises the following steps: obtaining a plurality of target air outlet temperatures, and adjusting the valve in the CO2 heat pump system to achieve an air source heat pump operation mode or a waste heat recovery mode; in the air source heat pump operation mode, adjusting the duty cycle of the cooling fan, the rotation speed of the electric compressor and the opening degree of the valve to achieve different target air outlet temperatures, and recording the energy consumption of the electrical devices under different working conditions; in the air source heat pump operation mode, the duty cycles of a plurality of cooling fans and the corresponding vehicle inlet air speed under different vehicle speeds are determined; the vehicle inlet air speed is taken as the bench inlet air speed, the duty cycle of the cooling fan is adjusted, and the energy consumption of the cooling fan under different duty cycles is recorded; in different external temperatures, the rotation speed of the electric compressor and the opening degree of the valve are adjusted to achieve different target air outlet temperatures, and the energy consumption of the electric compressor is recorded; in the waste heat recovery mode, the duty cycle of the electronic water pump, the rotation speed of the electric compressor and the opening degree of the valve are adjusted to achieve different target air outlet temperatures, and the energy consumption of the electrical devices under different working conditions is recorded; in the waste heat recovery mode, the duty cycles of a plurality of electronic water pumps and the water flow of the motor control circuit under different duty cycles are determined; the water flow is taken as the bench water inlet flow, the duty cycle of the electronic water pump is adjusted, and the energy consumption of the electronic water pump under different duty cycles is recorded; in different external temperatures and different water temperatures, the rotation speed of the electric compressor and the opening degree of the valve are adjusted to achieve different target air outlet temperatures, and the energy consumption of the electric compressor is recorded; by comparing the energy consumption of the electrical devices in the air source heat pump operation mode and the water source heat pump operation mode, the optimal operation mode under different target air outlet temperatures is selected.

2. The method of claim 1, wherein, in the air source heat pump operation mode, the energy consumption of the electrical devices is the sum of the energy consumption of the cooling fan and the energy consumption of the electric compressor.

3. The method of claim 1, wherein the CO2 heat pump system is a CO2 heat pump system for a refrigeration cycle. in the waste heat recovery mode, the energy consumption of the electrical devices is the sum of the energy consumption of the electronic water pump and the energy consumption of the electric compressor.

4. A CO2 heat pump system waste heat recovery device, characterized by, The method comprises the following steps: a mode changing module configured to obtain a plurality of target air outlet temperatures, and adjust the valve in the CO2 heat pump system to achieve an air source heat pump operation mode or a waste heat recovery mode; a first energy consumption calculation module configured to, in the air source heat pump operation mode, adjust the duty cycle of the cooling fan, the rotation speed of the electric compressor and the opening degree of the valve to achieve different target air outlet temperatures, and record the energy consumption of the electrical devices under different working conditions; the first energy consumption calculation module is specifically configured to, in the air source heat pump operation mode, determine the duty cycles of a plurality of cooling fans and the corresponding vehicle inlet air speed under different vehicle speeds; take the vehicle inlet air speed as the bench inlet air speed, adjust the duty cycle of the cooling fan, and record the energy consumption of the cooling fan under different duty cycles; in different external temperatures, adjust the rotation speed of the electric compressor and the opening degree of the valve to achieve different target air outlet temperatures, and record the energy consumption of the electric compressor; a second energy consumption calculation module configured to, in the waste heat recovery mode, adjust the duty cycle of the electronic water pump, the rotation speed of the electric compressor and the opening degree of the valve to achieve different target air outlet temperatures, and record the energy consumption of the electrical devices under different working conditions; the second energy consumption calculation module is specifically configured to, in the waste heat recovery mode, determine the duty cycles of a plurality of electronic water pumps and the water flow of the motor control circuit under different duty cycles; The water flow is taken as the bench water inlet flow, the duty cycle of the electronic water pump is adjusted, and the energy consumption of the electronic water pump under different duty cycles is recorded; The electric compressor speed and the valve opening degree are adjusted to reach different target air outlet temperatures under different external temperatures and different water temperatures, and the electric compressor energy consumption is recorded; The energy consumption comparison module is configured to: by comparing the energy consumption of the electric device in the air source heat pump operation mode and the water source heat pump operation mode, select the optimal operation mode under different target air outlet temperatures.

5. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the steps in the CO2 heat pump system waste heat recovery method of any one of claims 1-3.

6. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to implement the steps in the CO2 heat pump system waste heat recovery method of any one of claims 1-3.

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