Vehicle driving cabin heat management system and method with motor waste heat recovery function

Abstract

The invention relates to the field of automobiles, in particular to a vehicle driving cabin heat management system with a motor waste heat recovery function, a vehicle driving cabin heat management method with a motor waste heat recovery function, a controller and a computer readable storage medium. The method comprises the steps that the power of a compressor is obtained; obtaining a measurement result of the target device, determining the air specific enthalpy and the condensate specific enthalpy of the target device, and calculating the heat transfer amount of the target device according to the air specific enthalpy and the condensate specific enthalpy; and the heat efficiency of the vehicle driving cabin heat management system with the motor waste heat recovery function is calculated according to the heat transfer amount and the compressor power. According to the vehicle driving cabin heat management system with the motor waste heat recovery function, the vehicle driving cabin heat management method with the motor waste heat recovery function, the controller and the computer readable storage medium, the technical problem that in the prior art, quantitative analysis support is lacked between motor waste heat recovery and driving cabin temperature adjustment can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobiles, in particular to a vehicle cabin thermal management system with motor waste heat recovery, a vehicle cabin thermal management method with motor waste heat recovery, a controller and a computer readable storage medium. BACKGROUND

[0002] In the thermal management system of an electric vehicle, the waste heat continuously generated during the operation of the motor can be used as a potential heat source for temperature regulation of the cabin, especially in low temperature environments. By properly guiding the heat flow, the dependence on additional electric heating devices can be reduced. However, in practical applications, there is a lack of clear quantitative basis for the dynamic matching between the available amount of waste heat and the thermal demand of the cabin. The release intensity of motor waste heat varies under different driving conditions, while the required heating power of the cabin changes with environmental temperature, number of passengers and set temperature. The complex dynamic correlation has not formed a calculable corresponding relationship, resulting in a fuzzy state of waste heat utilization based on estimation.

[0003] The current thermal management system adjustment logic is mostly based on the experience accumulation of engineers, and realizes linkage control through preset fixed thresholds or simple feedback mechanisms. For example, when the motor temperature exceeds a certain critical point, the waste heat recovery channel is opened; when the cabin temperature is below the set value, auxiliary heating is started. This mode is difficult to cope with complex and variable actual scenarios - energy waste may occur due to excess waste heat supply, or heating lag may occur due to insufficient waste heat, ultimately affecting the comfort of the cabin and the energy efficiency of the vehicle.

[0004] More importantly, the updating and optimization of system parameters also rely on experience iteration. Engineers need to collect feedback through extensive real vehicle testing, and then adjust key parameters such as heat exchange valve opening and fan speed based on subjective judgment, but they cannot predict the actual effect of the adjusted parameters through quantitative models. This experience-driven development mode not only prolongs the technology iteration cycle, but also makes it difficult to adapt to diverse use scenarios, so the synergistic potential of motor waste heat and cabin temperature regulation has not been fully realized. SUMMARY

[0005] Therefore, it is necessary to provide a vehicle cabin thermal management system with motor waste heat recovery, a vehicle cabin thermal management method with motor waste heat recovery, a controller and a computer readable storage medium to solve the technical problem of lacking quantitative analysis support between motor waste heat recovery and cabin temperature regulation in the prior art.

[0006] To solve the above technical problems, in a first aspect, the present application provides a vehicle cabin thermal management system with motor waste heat recovery, comprising: A motor cooling loop for absorbing motor waste heat of a vehicle, a cabin temperature regulation loop for regulating a temperature of a cabin of the vehicle, and a controller for controlling the motor cooling loop and the cabin temperature regulation loop; The motor cooling loop comprises a power pump for driving a cooling liquid to circulate along the motor cooling loop, a motor heat exchange assembly connected with the power pump, and a main heat exchanger connected with the motor heat exchange assembly. The cabin temperature regulation loop comprises a compressor for driving a condensing liquid to circulate along the cabin temperature regulation loop, a condenser connected with the compressor, a first branch and a second branch connected with the condenser, the first branch comprising an evaporator, and the second branch comprising the main heat exchanger, the motor cooling loop and the cabin temperature regulation loop being connected to two sides of the main heat exchanger respectively, the compressor, the condenser, the evaporator, and inlet and outlet ends of the main heat exchanger being provided with measuring assemblies for measuring pressure, temperature, and mass flow. The controller is configured to determine a thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery according to measurement results of the measuring assemblies.

[0007] In a possible embodiment, the cabin temperature regulation loop further comprises a flow guide valve. The flow guide valve is connected between the compressor, the condenser, the first branch, and the second branch, and is configured to adjust a flow path of the condensing liquid to realize different cabin thermal management functions. The determination of the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery according to the measurement results of the measuring assemblies comprises: determining a thermal efficiency algorithm based on each of the cabin thermal management functions, and calculating the measurement results based on the thermal efficiency algorithm to obtain the thermal efficiency.

[0008] In a possible embodiment, the motor cooling loop further comprises a parallel flow heat exchanger. An inlet end of the parallel flow heat exchanger is connected with an inlet end of the main heat exchanger, and an outlet end of the parallel flow heat exchanger is connected with an outlet end of the main heat exchanger.

[0009] In a second aspect, the present application provides a vehicle cabin thermal management method with motor waste heat recovery, applied to the vehicle cabin thermal management system with motor waste heat recovery as described above, and comprising: obtaining a power of the compressor; obtaining measurement results of a target device, the measurement results comprising air pressure, air temperature and air mass flow rate of air passing through the target device, condensate pressure, condensate temperature and condensate mass flow rate of condensate passing through the target device, the target device being the condenser or the evaporator; determining air specific enthalpy of the target device based on the air pressure and the air temperature, determining condensate specific enthalpy of the target device based on the condensate pressure and the condensate temperature, and calculating heat transfer amount of the target device according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy and the condensate specific enthalpy; calculating thermal efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery according to the heat transfer amount and the compressor power.

[0010] In a possible embodiment, before the calculating thermal efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery according to the heat transfer amount and the compressor power, the vehicle cabin thermal management method with electric machine waste heat recovery further comprises: judging whether the subcooling degree / superheating degree of the condensate exceeds a preset range; when the subcooling degree / superheating degree does not exceed the preset range, calculating thermal efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery according to the heat transfer amount and the compressor power.

[0011] In a possible embodiment, the obtaining the compressor power comprises: obtaining compressor mass flow rate of the condensate passing through the compressor, front condensate pressure and front condensate temperature before the condensate passing through the compressor, and rear condensate pressure and rear condensate temperature after the condensate passing through the compressor; determining front specific enthalpy of the compressor based on a preset corresponding relationship according to the front condensate pressure and the front condensate temperature, determining rear specific enthalpy of the compressor according to the rear condensate pressure and the rear condensate temperature, and calculating the compressor power according to the front specific enthalpy, the rear specific enthalpy and the compressor mass flow rate.

[0012] In a possible embodiment, the calculating heat transfer amount of the target device according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy and the condensate specific enthalpy comprises: determining current cabin thermal management function of the vehicle cabin thermal management system with electric machine waste heat recovery, and determining heat transfer amount algorithm corresponding to the current cabin thermal management function; Based on the heat transfer amount algorithm, the heat transfer amount of the target device is calculated according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy.

[0013] In a possible embodiment, the heat efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery is calculated according to the heat transfer amount and the compressor power, including: determining a current cabin thermal management function of the vehicle cabin thermal management system with electric machine waste heat recovery, and determining a heat efficiency algorithm corresponding to the current cabin thermal management function; Based on the heat efficiency algorithm, the heat efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery is calculated according to the heat transfer amount and the compressor power.

[0014] In a third aspect, the present application also provides a controller applied to the vehicle cabin thermal management system with electric machine waste heat recovery as described above, including a memory and a processor, wherein, The memory is configured to store a program. The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the vehicle cabin thermal management method with electric machine waste heat recovery in any of the implementation manners described above, so as to control the electric machine cooling circuit and the cabin temperature regulation circuit.

[0015] In a fourth aspect, the present application also provides a computer readable storage medium applied to the controller as described above, configured to store computer readable programs or instructions, which can implement the steps of the vehicle cabin thermal management method with electric machine waste heat recovery in any of the implementation manners described above when executed by a processor.

[0016] The present application has the following beneficial effects: Compared with the related art, in the vehicle cabin thermal management system with motor waste heat recovery, the vehicle cabin thermal management method with motor waste heat recovery, the controller and the computer readable storage medium provided in the application, the motor cooling circuit and the cabin temperature adjusting circuit are connected through the main heat exchanger, the motor cooling circuit can transmit the heat generated by the motor to the cabin temperature adjusting circuit through the main heat exchanger, so as to realize the temperature adjustment of the cabin, and on this basis, the measuring components are arranged at the inlet and outlet of the compressor, the condenser, the evaporator and the main heat exchanger, the pressure, temperature and mass flow rate before and after the condensate flows through the compressor, the condenser, the evaporator and the main heat exchanger are measured through the measuring components, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery can be calculated according to the measurement results, and specific quantitative analysis between the motor waste heat recovery and the cabin temperature adjustment can be realized according to the calculation results of the thermal efficiency, so as to provide data support for the optimization and adjustment process of the vehicle cabin thermal management system. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 、 Figure 2 The structure schematic diagram of the vehicle cabin thermal management system with motor waste heat recovery provided in the embodiments of the application is shown in the figure. Figure 3 The flowchart of the vehicle cabin thermal management method with motor waste heat recovery provided in the embodiments of the application is shown in the figure. Figure 4 The flowchart of acquiring the power of the compressor in the vehicle cabin thermal management method with motor waste heat recovery provided in the embodiments of the application is shown in the figure. Figure 5 The flowchart of calculating the heat transfer amount of the target device in the vehicle cabin thermal management method with motor waste heat recovery provided in the embodiments of the application is shown in the figure. Figure 6 The structure schematic diagram of the controller provided in the embodiments of the application is shown in the figure. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0019] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specified. The association relationship of the associated objects described by "and / or" indicates that there can be three relationships, for example: A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone.

[0020] The "first", "second", and the like described in the embodiments of the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the technical features limited by "first" and "second" can explicitly or implicitly include at least one of the features.

[0021] In this document, referring to "embodiments" means that the specific features, structures, or properties described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] The present application provides a vehicle cabin thermal management system with motor waste heat recovery, a vehicle cabin thermal management method with motor waste heat recovery, a controller and a computer readable storage medium, which are described below respectively.

[0023] It can be understood that the actual operation process of the vehicle is relatively complex, and there are many factors affecting the thermal management process of the vehicle cabin. In order to facilitate calculation, the following factors that have less influence on the calculation results are ignored in the calculation process of the present application, and the following reasonable assumptions are proposed: (1) All processes are operated under steady-state conditions; (2) The effects of potential energy, kinetic energy and chemical energy are ignored; (3) The direction of mass and heat transferred by the thermal management system is positive; (4) The pressure drop of the fluid (cooling liquid, condensing agent) in all components and pipelines is ignored; (5) The compression process of the compressor is an adiabatic process, and the expansion process of the expansion valve is an isenthalpic process; (6) The environmental air is regarded as an ideal gas, and its specific heat capacity is constant.

[0024] Please refer to Figure 1 , Figure 2The vehicle cabin thermal management system with motor waste heat recovery provided in the embodiments of the present application can specifically include: a motor cooling loop 100 for absorbing motor waste heat of a vehicle, a cabin temperature adjustment loop 200 for adjusting temperature of a vehicle cabin, and a controller 300 for controlling the motor cooling loop 100 and the cabin temperature adjustment loop 200.

[0025] In the embodiments, the motor cooling loop 100 specifically includes a power pump 10 for driving cooling liquid to circulate along the motor cooling loop, a motor heat exchange assembly 9 connected to the power pump 10, and a main heat exchanger (including two opposite pipes 8 and 11) connected to the motor heat exchange assembly 9. The cabin temperature adjustment loop 200 includes a compressor 1 for driving condensing liquid to circulate along the cabin temperature adjustment loop, a condenser 4 connected to the compressor 1, a first branch and a second branch connected to the condenser 4, the first branch including an evaporator 7, and the second branch including the main heat exchanger (including the two opposite pipes 8 and 11). The motor cooling loop 100 and the cabin temperature adjustment loop 200 are connected to two sides of the main heat exchanger, for example, the motor cooling loop 100 is connected to the pipe 11, and the cabin temperature adjustment loop 200 is connected to the pipe 8. Figure 2 Further, measurement assemblies (including pressure test pieces P, temperature test pieces T, and mass flow test pieces M) are arranged at the liquid inlet ends and the liquid outlet ends of the compressor, the condenser, the evaporator, and the main heat exchanger, and are used to measure pressure, temperature, and mass flow.

[0026] In the embodiments, after the controller 300 obtains measurement results of the measurement assemblies, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery can be calculated according to the measurement results. In the embodiments, the thermal efficiency is the contribution rate of motor waste heat recovery to the process of supplying heat to the vehicle cabin.

[0027] In the embodiments, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery can be calculated according to the measurement results. Details can be referred to the specific description of the vehicle cabin thermal management method with motor waste heat recovery provided in subsequent embodiments.

[0028] Compared with the related art, in the vehicle cabin thermal management system with motor waste heat recovery provided by the embodiment, the motor cooling circuit and the cabin temperature regulation circuit are connected through the main heat exchanger, the motor cooling circuit can transmit the heat generated by the motor to the cabin temperature regulation circuit through the main heat exchanger, so as to realize the temperature regulation of the cabin, on this basis, the measuring components are arranged at the inlet and outlet of the compressor, the condenser, the evaporator and the main heat exchanger, the pressure, the temperature and the mass flow rate of the condensate before and after flowing through the compressor, the condenser, the evaporator and the main heat exchanger are measured through the measuring components, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery can be calculated according to the measurement results, and the specific quantitative analysis between the motor waste heat recovery and the cabin temperature regulation can be realized according to the calculation results of the thermal efficiency, thereby providing data support for the optimization and regulation process of the vehicle cabin thermal management system. Further, please continue to refer to Figure 2 The motor cooling circuit 100 further comprises: a parallel flow heat exchanger 12; the inlet of the parallel flow heat exchanger 12 is connected with the inlet of the main heat exchanger, and the outlet of the parallel flow heat exchanger is connected with the outlet of the main heat exchanger.

[0029] Further, please continue to refer to Figure 2 In some embodiments of the present application, the cabin temperature regulation circuit 200 further comprises: a flow guide valve 2; the flow guide valve 2 is connected between the compressor, the condenser, the first branch and the second branch, and is used to adjust the flow path of the condensate to realize different cabin thermal management functions.

[0030] Specifically, in the embodiments of the present application, the flow guide valve can be a four-way valve, and according to different opening and closing states of the valve, four working modes of the cabin cooling mode, the cabin heating mode, the cabin heating / motor waste heat recovery mode and the cabin / motor cooling mode can be realized.

[0031] Specifically, in the cabin cooling mode, the flow path of the condensate driven by the compressor is compressor 1-four-way valve 2-condenser-first electronic expansion valve 5-evaporator 7-four-way valve 2-gas-liquid separator 3-compressor 1.

[0032] In the cabin heating mode, the flow path of the condensate driven by the compressor is compressor 1-four-way valve 2-evaporator 7-first electronic expansion valve 5-condenser-four-way valve 2-gas-liquid separator 3-compressor 1.

[0033] In the cabin heating / motor waste heat recovery mode, the flow path of the condensate driven by the compressor 1 is divided into two paths, one of which is used for cabin heating, and the other of which is used for motor waste heat recovery. The flow path 1 of the condensate is compressor 1-four-way valve 2-evaporator 7-first electronic expansion valve 5-condenser 4-four-way valve 2-gas-liquid separator 3-compressor 1, and the flow path 2 of the condensate is compressor 1-four-way valve 2-heat exchanger pipe 8-second electronic expansion valve 6-condenser 4-four-way valve 2-gas-liquid separator 3-compressor 1. The flow path of the cooling liquid in the motor cooling circuit is water pump 10-heat exchanger pipe 11-motor heat exchange assembly 9-water pump 10.

[0034] In the cabin / motor cooling mode, the flow path of the condensate driven by the compressor 1 is compressor 1-four-way valve 2-condenser 4-first electronic expansion valve 5-evaporator 7-four-way valve 2-gas-liquid separator 3-compressor 1. The flow path of the cooling liquid in the motor cooling circuit is water pump 10-parallel flow heat exchanger 12-motor heat exchange assembly 9-water pump 10.

[0035] On this basis, in some embodiments of the present application, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is determined according to the measurement results of the measurement assembly, including: determining a thermal efficiency algorithm based on each cabin thermal management function, calculating the measurement results based on the thermal efficiency algorithm to obtain the thermal efficiency. On this basis, corresponding to the cabin heating mode, the thermal efficiency can be the heating performance coefficient; corresponding to the cabin heating / motor waste heat recovery mode, the thermal efficiency can be the contribution rate of the aforementioned motor waste heat recovery to the vehicle cabin heating process; corresponding to the cabin cooling mode or the cabin / motor and motor controller cooling mode, the thermal efficiency can be the cooling performance coefficient, and the specific calculation process can refer to the specific description in the vehicle cabin thermal management method with motor waste heat recovery provided in the subsequent embodiments.

[0036] For reference Figure 3 The embodiment of the present application provides a vehicle cabin thermal management method with motor waste heat recovery, which is applied to the vehicle cabin thermal management system with motor waste heat recovery provided in the foregoing embodiments, and specifically includes the following steps: Step S301: acquiring the power of the compressor.

[0037] In this step, for reference Figure 4 The power of the compressor 1 can be specifically acquired by: Step S401: acquiring the compressor mass flow rate of the condensate passing through the compressor, the front condensate pressure and the front condensate temperature of the condensate before passing through the compressor, and the rear condensate pressure and the rear condensate temperature of the condensate after passing through the compressor.

[0038] Step S402: determining the front specific enthalpy of the compressor according to the front condensate pressure and the front condensate temperature and determining the rear specific enthalpy of the compressor according to the rear condensate pressure and the rear condensate temperature based on the preset corresponding relationship.

[0039] The preset corresponding relationship can be obtained by performing multiple experiments in advance, and each experiment obtains actual condensate pressure, condensate temperature and specific enthalpy. According to the results of multiple experiments, a corresponding relationship between condensate pressure, condensate temperature and specific enthalpy is constructed as the preset corresponding relationship in this embodiment. In this step, the corresponding specific enthalpy as the front specific enthalpy can be directly found in the preset corresponding relationship according to the measured front condensate pressure and front condensate temperature, and the corresponding specific enthalpy as the rear specific enthalpy can be directly found in the preset corresponding relationship according to the measured rear condensate pressure and rear condensate temperature.

[0040] Step S403: calculating the power of the compressor according to the front specific enthalpy, the rear specific enthalpy and the mass flow rate of the compressor.

[0041] The calculation formula can be specifically: ; Wherein, is the power of the compressor 1, is the mass flow rate of the compressor, is the rear specific enthalpy, is the front specific enthalpy, is the constant adiabatic efficiency of the compressor 1, which can be 0.8, 0.7, …, etc.

[0042] Step S302: obtaining the measurement results of the target device.

[0043] In this step, the target device can be the condenser 4 or the evaporator 7. When the target device is the condenser 4, the measurement results are the air pressure, air temperature and air mass flow rate of the air passing through the condenser 4, and the condensate pressure, condensate temperature and condensate mass flow rate of the condensate passing through the condenser 4; when the target device is the evaporator 7, the measurement results are the air pressure, air temperature and air mass flow rate of the air passing through the evaporator 7, and the condensate pressure, condensate temperature and condensate mass flow rate of the condensate passing through the evaporator 7.

[0044] Step S303: calculating the heat transfer amount of the target device according to the measurement results.

[0045] In this step, please refer to Figure 5 The calculation of the heat transfer amount of the target device according to the measurement results can specifically include: Step S501: determining the air specific enthalpy of the target device based on the air pressure and the air temperature.

[0046] Wherein, please refer toFigure 2 Correspondingly, the condenser 4 fan 13 can blow air to the condenser 4, and the evaporator 7 fan 14 can blow air to the evaporator 7. The air pressure and air temperature before and after the target device can be measured, and the corresponding air specific enthalpy can be determined according to the preset corresponding relationship. The air before and after the target device corresponds to an air specific enthalpy respectively.

[0047] Step S502: determining the condensate specific enthalpy of the target device based on the condensate pressure and the condensate temperature.

[0048] The condensate pressure and condensate temperature before and after the target device can be measured, and the corresponding condensate specific enthalpy can be determined according to the preset corresponding relationship. The condensate before and after the target device corresponds to a condensate specific enthalpy respectively.

[0049] Step S503: calculating the heat transfer amount of the target device according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy.

[0050] Specifically, when the target device is the condenser 4, the calculation formula can be specifically as follows: ; Wherein, Qcondenser is the heat transfer amount of the condenser 4, Qvehicle is the heat supply amount of the vehicle cabin thermal management system, is the mass flow rate of the refrigerant through the condenser 4, is the specific enthalpy difference between the inlet and outlet of the condenser 4, is the mass flow rate of the air through the condenser 4, is the specific enthalpy difference before and after the air passing through the condenser 4.

[0051] When the target device is the evaporator 7, the calculation formula can be specifically as follows: ; Wherein, Qevaporator is the heat transfer amount of the evaporator 7, is the mass flow rate of the refrigerant through the evaporator 7, is the specific enthalpy difference between the inlet and outlet of the evaporator 7, is the mass flow rate of the air through the evaporator 7, is the specific enthalpy difference before and after the air passing through the evaporator 7.

[0052] Step S304: calculating the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery according to the heat transfer amount and the compressor power.

[0053] Specifically, the calculation formula is as follows: ; in, PWHR The thermal efficiency is the contribution rate of motor waste heat recovery to the vehicle cabin heating process in this step.

[0054] It can be understood that the above is only provided in one embodiment of the present application, which only includes the cabin heating / motor waste heat recovery mode, and the thermal efficiency is an example of calculating the thermal efficiency in the embodiment of the contribution rate of the motor waste heat recovery to the vehicle cabin heating process. Furthermore, in some other embodiments of the present application, other working modes such as the cabin cooling mode, the cabin heating mode, and the cabin / motor cooling mode may also be included. On this basis, step S304 may further specifically include: determining the current cabin thermal management function of the vehicle cabin thermal management system with motor waste heat recovery, and determining the thermal efficiency algorithm corresponding to the current cabin thermal management function; based on the thermal efficiency algorithm, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is calculated according to the heat transfer amount and the compressor power.

[0055] Corresponding to the cabin cooling mode or the cabin / motor and motor controller cooling mode, the thermal efficiency may be a cooling performance coefficient. The specific calculation formula of the thermal efficiency algorithm may be: ; Among them, COPcool is the cooling performance coefficient of the vehicle's cabin thermal management system.

[0056] For the cabin heating mode, the thermal efficiency can be the heating performance coefficient, and the specific calculation formula of the thermal efficiency algorithm can be: ; Among them, COPheat is the heating performance coefficient of the vehicle cabin thermal management system, is the heat transfer rate of the heat exchanger. Meanwhile, in the cabin heating mode, the heat transfer rate of the evaporator 7 ( ) is to release heat to the environment. In this state, the calculation formula corresponding to the heat transfer algorithm is different from the specific calculation formula of the aforementioned heat transfer algorithm, which can be specifically: .

[0057] That is, in different embodiments of the present application, the heat transfer amount of the target device is calculated according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy, specifically including: determining a current cabin thermal management function of the vehicle cabin thermal management system with electric machine waste heat recovery, and determining a heat transfer amount algorithm corresponding to the current cabin thermal management function; based on the heat transfer amount algorithm, calculating the heat transfer amount of the target device according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy.

[0058] In the cabin heating mode, the heat transfer rate of the heat exchanger is calculated by the formula: ; wherein, is the mass flow rate of the cooling liquid through the heat exchanger pipeline 8, is the specific enthalpy difference of the cooling liquid between the inlet and outlet of the heat exchanger pipeline 8, is the mass flow rate of the condensate through the heat exchanger pipeline 11, is the constant pressure specific heat capacity of the condensate, is the temperature difference of the condensate between the inlet and outlet of the heat exchanger pipeline 11, is the constant heat transfer efficiency of the heat exchanger, which can be 0.7, 0.6, etc.

[0059] Compared with the foregoing embodiments, in the present embodiment, according to the current cabin thermal management function of the vehicle cabin thermal management system, the heat transfer amount algorithm and the corresponding heat efficiency algorithm corresponding to the current cabin thermal management function are determined, so that the corresponding data of the heat efficiency of each cabin thermal management function of the vehicle cabin thermal management system can be provided for quantitative analysis, and the optimization of the cabin thermal management function is more convenient.

[0060] Further, before the heat efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery is calculated according to the heat transfer amount and the compressor power, the vehicle cabin thermal management method with electric machine waste heat recovery further includes: judging whether the supercooling degree / overheating degree of the condensate exceeds a preset range; when the supercooling degree / overheating degree does not exceed the preset range, calculating the heat efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery according to the heat transfer amount and the compressor power. By judging whether the supercooling degree / overheating degree of the condensate exceeds the preset range, it can be judged whether the vehicle cabin thermal management system is running normally, and when the supercooling degree / overheating degree does not exceed the preset range, the heat efficiency of the vehicle cabin thermal management system with electric machine waste heat recovery is calculated according to the heat transfer amount and the compressor power, that is, the calculation of the heat efficiency is only performed when the vehicle cabin thermal management system is in a normal running state, so as to improve the accuracy of the calculation result of the heat efficiency.

[0061] Please refer to Figure 6This application also provides a controller 600 for use in the vehicle cabin thermal management system with motor waste heat recovery provided in the aforementioned embodiment. The controller 600 is connected to the motor cooling circuit and cabin temperature control circuit in the vehicle cabin thermal management system with motor waste heat recovery provided in the aforementioned embodiment, and controls the motor cooling circuit and cabin temperature control circuit. The controller 600 includes a processor 601, a memory 602, and a display 603. Figure 6 Only some of the components of the controller 600 are shown, but it should be understood that implementing all of the shown components is not a requirement, and more or fewer components may alternatively be implemented.

[0062] In some embodiments, the processor 601 can be a central processing unit (CPU), a microprocessor, or other data processing chip, used to run the program code or process data stored in the memory 602, such as the vehicle cabin thermal management method with motor waste heat recovery in this application.

[0063] In some embodiments, processor 601 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 601 may be local or remote. In some embodiments, processor 601 may be implemented on a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an on-premises cloud, a multi-cloud, or any combination thereof.

[0064] In some embodiments, the memory 602 may be an internal storage unit of the controller 600, such as a hard disk or memory of the controller 600. In other embodiments, the memory 602 may also be an external storage device of the controller 600, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card, etc. equipped on the controller 600.

[0065] Furthermore, the memory 602 may include both an internal storage unit of the controller 600 and an external storage device. The memory 602 is used to store application software installed in the controller 600 and various data.

[0066] In some embodiments, display 603 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 603 is used to display information on controller 600 and to display a visual user interface. Components 601-603 of controller 600 communicate with each other via a system bus.

[0067] In an embodiment, when the processor 601 executes the vehicle cabin thermal management program with electric motor waste heat recovery in the memory 602, the following steps can be implemented: obtaining the power of the compressor; obtaining the measurement results of the target device, the measurement results including the air pressure, the air temperature and the air mass flow rate of the air passing through the target device, the condensate pressure, the condensate temperature and the condensate mass flow rate of the condensate passing through the target device, the target device being a condenser or an evaporator; determining the air specific enthalpy of the target device based on the air pressure and the air temperature, determining the condensate specific enthalpy of the target device based on the condensate pressure and the condensate temperature, and calculating the heat transfer amount of the target device according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy and the condensate specific enthalpy; calculating the thermal efficiency of the vehicle cabin thermal management system with electric motor waste heat recovery according to the heat transfer amount and the compressor power.

[0068] It should be understood that, when the processor 601 executes the vehicle cabin thermal management program with electric motor waste heat recovery in the memory 602, in addition to the above functions, other functions can also be implemented, which can be referred to the description of the corresponding method embodiments.

[0069] Further, the type of the controller 600 mentioned in the embodiments of the present application is not specifically limited, and the controller 600 can be a portable controller such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop, etc. Exemplary embodiments of the portable controller include but are not limited to a portable controller running an IOS, an android, a microsoft or other operating system. The portable controller can also be other portable controllers such as a laptop with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present application, the controller 600 can also be a desktop computer with a touch-sensitive surface (e.g., a touch panel) instead of a portable controller.

[0070] Correspondingly, the embodiments of the present application also provide a computer-readable storage medium applied to the controller provided in the foregoing embodiments, the computer-readable storage medium being used to store a computer-readable program or instruction, the program or instruction being executed by a processor to implement the steps or functions in the vehicle cabin thermal management method with electric motor waste heat recovery provided in the method embodiments.

[0071] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiment methods can be instructed by a computer program to relevant hardware (such as a processor, a controller, etc.) to be completed, and the computer program can be stored in a computer readable storage medium. Wherein, the computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.

[0072] The above provides a vehicle cabin thermal management system with electric machine waste heat recovery, a vehicle cabin thermal management method with electric machine waste heat recovery, a controller and a computer readable storage medium. The principle and implementation of the present application are described in this paper by applying specific examples. The above examples are only used to help understand the method and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed; in summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A vehicle cabin thermal management system with motor waste heat recovery, characterized in that: include: a motor cooling circuit for absorbing waste heat from the vehicle motor, a cabin temperature control circuit for regulating the temperature of the vehicle cabin, and a controller for controlling the motor cooling circuit and the cabin temperature control circuit; The motor cooling circuit includes a power pump for driving the coolant to circulate along the motor cooling circuit, a motor heat exchange component connected to the power pump, and a main heat exchanger connected to the motor heat exchange component; The cabin temperature control circuit includes a compressor for driving condensate to circulate along the cabin temperature control circuit, a condenser connected to the compressor, and a first branch and a second branch connected to the condenser; The first branch includes an evaporator, the second branch includes the main heat exchanger, the motor cooling circuit and the cabin temperature control circuit are respectively connected to both sides of the main heat exchanger, and the compressor, the condenser, the evaporator, and the liquid inlet and outlet of the main heat exchanger are all provided with measurement components for measuring pressure, temperature, and mass flow; The controller is used to determine the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery based on the measurement results of the measurement component.

2. The vehicle cabin thermal management system with motor waste heat recovery according to claim 1, characterized in that: The cabin temperature regulating circuit further includes: a diverter valve; The diverter valve is connected between the compressor, the condenser, the first branch, and the second branch, and is used to adjust the flow path of the condensate to achieve different cabin thermal management functions; Determining the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery according to the measurement result of the measurement component includes: A thermal efficiency algorithm is determined based on each of the cockpit thermal management functions, and the measurement results are calculated based on the thermal efficiency algorithm to obtain the thermal efficiency.

3. The vehicle cabin thermal management system with motor waste heat recovery according to claim 1, characterized in that: The motor cooling circuit further includes: a parallel flow heat exchanger; The liquid inlet end of the parallel flow heat exchanger is connected to the liquid inlet end of the main heat exchanger, and the liquid outlet end of the parallel flow heat exchanger is connected to the liquid outlet end of the main heat exchanger.

4. A vehicle cabin thermal management method with motor waste heat recovery, applied to the vehicle cabin thermal management system with motor waste heat recovery according to any one of claims 1 to 3, characterized in that: include: obtaining the power of the compressor; Obtaining measurement results of a target device, the measurement results including air pressure, air temperature, and air mass flow rate of air passing through the target device, and condensate pressure, condensate temperature, and condensate mass flow rate of condensate passing through the target device, where the target device is the condenser or the evaporator; determining an air specific enthalpy of the target device based on the air pressure and the air temperature, determining a condensate specific enthalpy of the target device based on the condensate pressure and the condensate temperature, and calculating a heat transfer amount of the target device based on the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy; The thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is calculated based on the heat transfer amount and the compressor power.

5. The vehicle cabin thermal management method with motor waste heat recovery according to claim 4 is characterized in that: Before calculating the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery based on the heat transfer amount and the compressor power, the vehicle cabin thermal management method with motor waste heat recovery further includes: Determining whether the subcooling / superheating of the condensate exceeds a preset range; When the degree of subcooling / the degree of superheating does not exceed the preset range, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is calculated according to the heat transfer amount and the compressor power.

6. The vehicle cabin thermal management method with motor waste heat recovery according to claim 4, characterized in that: The obtaining the power of the compressor includes: Obtaining a compressor mass flow rate of the condensate passing through the compressor, a front condensate pressure and a front condensate temperature before the condensate passes through the compressor, and a rear condensate pressure and a rear condensate temperature after the condensate passes through the compressor; Based on a preset corresponding relationship, the front specific enthalpy of the compressor is determined according to the front condensate pressure and the front condensate temperature, the rear specific enthalpy of the compressor is determined according to the rear condensate pressure and the rear condensate temperature, and the power of the compressor is calculated according to the front specific enthalpy, the rear specific enthalpy and the compressor mass flow rate.

7. The vehicle cabin thermal management method with motor waste heat recovery according to claim 4, characterized in that: The heat transfer amount of the target device is calculated according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy, comprising: determining a current cabin thermal management function of the vehicle cabin thermal management system with motor waste heat recovery, and determining a heat transfer algorithm corresponding to the current cabin thermal management function; Based on the heat transfer algorithm, the heat transfer of the target device is calculated according to the air mass flow rate, the condensate mass flow rate, the air specific enthalpy, and the condensate specific enthalpy.

8. The vehicle cabin thermal management method with motor waste heat recovery according to claim 4, characterized in that: The thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is calculated based on the heat transfer amount and the compressor power, including: determining a current cabin thermal management function of the vehicle cabin thermal management system with motor waste heat recovery, and determining a thermal efficiency algorithm corresponding to the current cabin thermal management function; Based on the thermal efficiency algorithm, the thermal efficiency of the vehicle cabin thermal management system with motor waste heat recovery is calculated according to the heat transfer amount and the compressor power.

9. A controller, applied to a vehicle cabin thermal management system with motor waste heat recovery according to any one of claims 1 to 3, characterized in that: comprising a memory and a processor, wherein, The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the vehicle cabin thermal management method with motor waste heat recovery as described in any one of claims 4 to 8 to control the motor cooling circuit and the cabin temperature control circuit.

10. A computer-readable storage medium, applied to the controller according to claim 9, characterized in that: Used to store computer-readable programs or instructions, which, when executed by a processor, can implement the steps of the vehicle cabin thermal management method with motor waste heat recovery as described in any one of claims 4 to 8.

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