CN116872670A - Control method and device for electronic expansion valve, temperature control system and storage medium - Google Patents

Control method and device for electronic expansion valve, temperature control system and storage medium Download PDF

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Publication number
CN116872670A
CN116872670A CN202310274968.2A CN202310274968A CN116872670A CN 116872670 A CN116872670 A CN 116872670A CN 202310274968 A CN202310274968 A CN 202310274968A CN 116872670 A CN116872670 A CN 116872670A
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CN
China
Prior art keywords
expansion valve
electronic expansion
superheat degree
opening
air conditioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310274968.2A
Other languages
Chinese (zh)
Inventor
叶琳
崔尘
梁杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Zero Run Technology Co Ltd
Zhejiang Lingsheng Power Technology Co Ltd
Original Assignee
Zhejiang Zero Run Technology Co Ltd
Zhejiang Lingsheng Power Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Zero Run Technology Co Ltd, Zhejiang Lingsheng Power Technology Co Ltd filed Critical Zhejiang Zero Run Technology Co Ltd
Priority to CN202310274968.2A priority Critical patent/CN116872670A/en
Publication of CN116872670A publication Critical patent/CN116872670A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The application discloses a control method and device of an electronic expansion valve, a temperature control system and a storage medium, wherein the method comprises the following steps: receiving a refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; based on the refrigeration control instruction, controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin. Through the mode, the refrigerating device can preferentially ensure that the battery is refrigerated and the passenger cabin is refrigerated.

Description

Control method and device for electronic expansion valve, temperature control system and storage medium
Technical Field
The application relates to the technical field of automobiles, in particular to a control method and device of an electronic expansion valve, a temperature control system and a storage medium.
Background
At present, a traditional air conditioning system of a fuel automobile generally adopts a thermal expansion valve, and only a passenger cabin needs to be refrigerated. However, for new energy automobiles, both the passenger compartment and the battery have refrigeration requirements, and the thermostatic expansion valve cannot meet the adjustment under multiple requirements.
Disclosure of Invention
The application mainly solves the technical problem of providing a control method and device for an electronic expansion valve, a temperature control system and a storage medium, which can preferentially ensure that a passenger cabin is refrigerated while a battery is refrigerated.
In order to solve the technical problems, the application adopts a technical scheme that: there is provided a control method of an electronic expansion valve, the method comprising: receiving a refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; based on the refrigeration control instruction, controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin.
Wherein, after controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control command, the control method of the electronic expansion valve further comprises: acquiring a first current superheat degree of a battery temperature control system side; responding to the fact that the first current superheat degree is not equal to a first superheat degree threshold value, and gradually adjusting the opening of the first electronic expansion valve according to a first preset step length; obtaining a second current superheat degree of the air conditioning system side; and in response to the second current superheat degree not being equal to the second superheat degree threshold value, gradually adjusting the opening of the second electronic expansion valve according to a second preset step length.
The control method of the electronic expansion valve further comprises the following steps: and responding to the adjusted opening degree of the first electronic expansion valve to be the maximum opening degree of the first electronic expansion valve, wherein the first current superheat degree is larger than a first superheat degree threshold value, and reducing the opening degree of a second electronic expansion valve in the air conditioning system until the temperature in the passenger cabin is larger than or equal to a preset temperature.
The method for reducing the opening of the second electronic expansion valve in the air conditioning system until the temperature in the passenger cabin is greater than or equal to a preset temperature comprises the following steps of: responding to the adjusted opening degree of the first electronic expansion valve as the maximum opening degree of the first electronic expansion valve, wherein the first current superheat degree is larger than a first superheat degree threshold value, reducing the opening degree of the second electronic expansion valve by a second preset step length, and acquiring the temperature in the passenger cabin after a preset time length; and in response to the temperature in the passenger cabin after the preset time period being less than the preset temperature, taking the reduced opening of the second electronic expansion valve as the opening of the second electronic expansion valve, and re-executing the steps of reducing the opening of the second electronic expansion valve and the follow-up steps by a second preset step length until the temperature in the passenger cabin is greater than or equal to the preset temperature.
The step of adjusting the opening of the first electronic expansion valve step by step according to a first preset step length in response to the first current superheat degree not being equal to the first superheat degree threshold value comprises the following steps: responding to the fact that the first current superheat degree is larger than a first superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to a first preset step length; responding to the fact that the first current superheat degree is smaller than a first superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a first preset step length; and the response to the second current superheat degree not being equal to the second superheat degree threshold value, gradually adjusting the opening of the second electronic expansion valve according to a second preset step length, including: responding to the fact that the second current superheat degree is larger than a second superheat degree threshold value, and gradually increasing the opening of the second electronic expansion valve according to a second preset step length; and responding to the fact that the second current superheat degree is smaller than a second superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a second preset step length.
The battery temperature control system is also used for heating the battery, and the air conditioning system is also used for heating the passenger cabin; the control method of the electronic expansion valve further comprises the following steps: receiving a heating control instruction; the heating control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; and controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction.
Wherein, after controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control command, the control method of the electronic expansion valve further comprises: acquiring a third current superheat degree of a battery temperature control system side; responding to the fact that the third current superheat degree is larger than a third superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a third preset step length; responding to the fact that the third current superheat degree is smaller than a third superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to a third preset step length; obtaining a fourth current superheat degree of the air conditioning system side; responding to the fact that the fourth current superheat degree is larger than a fourth superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a fourth preset step length; and in response to the fourth current superheat degree being smaller than a fourth superheat degree threshold value, gradually increasing the opening of the second electronic expansion valve according to a fourth preset step length.
In order to solve the technical problems, the application adopts another technical scheme that: providing a control device of an electronic expansion valve, wherein the control device comprises a receiving module and a control module; the receiving module is used for receiving the refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; the control module is used for controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin.
In order to solve the technical problems, the application adopts another technical scheme that: a temperature control system is provided, which is used for the control method of the electronic expansion valve.
In order to solve the technical problems, the application adopts another technical scheme that: there is provided a computer readable storage medium storing program instructions executable by a processor for implementing the control method of an electronic expansion valve described above.
According to the technical scheme, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are controlled to be opened based on the refrigeration control instruction. Therefore, the battery and the passenger cabin of the vehicle can be simultaneously refrigerated, on one hand, the battery is cooled, the battery is prevented from being damaged due to overhigh temperature, and on the other hand, the passenger cabin can have more comfortable temperature; in addition, the battery can be refrigerated preferentially, so that the battery of the vehicle is prevented from being damaged due to the fact that the temperature is too high, and the influence on the normal use of the vehicle is avoided.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a control method of an electronic expansion valve according to the present application;
FIG. 2 is a schematic structural diagram of an embodiment of a control device for an electronic expansion valve according to the present application;
fig. 3 is a schematic structural diagram of an embodiment of a computer readable storage medium according to the present application.
Detailed Description
In order to make the objects, technical solutions and effects of the present application clearer and more specific, the present application will be described in further detail below with reference to the accompanying drawings and examples.
It should be noted that, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implying that the number of technical features indicated is indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a control method of an electronic expansion valve according to the present application. It should be noted that, if there are substantially the same results, the present embodiment is not limited to the flow sequence shown in fig. 1. As shown in fig. 1, the present embodiment includes:
step S11: and receiving a refrigeration control instruction.
In a conventional fuel vehicle, only the passenger compartment needs to be refrigerated, while in a new energy vehicle, the battery also has a need for refrigeration, i.e., the battery and passenger compartment need to be refrigerated. The method is used for controlling the electronic expansion valve, can realize the refrigeration of the battery and the passenger cabin of the vehicle, and preferentially ensures the refrigeration of the battery of the vehicle.
In this embodiment, a cooling control instruction is received, where the cooling control instruction is used to instruct a first electronic expansion valve controlling a battery temperature control system and a second electronic expansion valve controlling an air conditioning system to be opened to determine whether cooling of a battery of a vehicle or cooling of a passenger compartment of the vehicle is required.
Step S12: and controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction.
In this embodiment, based on the refrigeration control instruction, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are controlled to be opened; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin. That is, when a refrigeration control instruction is received, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are controlled to be opened, so that the purposes of battery refrigeration and passenger cabin refrigeration are achieved; that is, both the battery and the passenger compartment can be cooled when both are in need of cooling.
Wherein the battery has a higher refrigeration priority than the passenger compartment. That is, when both the battery and the passenger compartment have refrigeration requirements, the battery is preferably refrigerated to avoid damage to the battery of the vehicle due to excessive temperature, thereby avoiding influence on normal use of the vehicle.
Since the battery and the passenger compartment are cooled after the first electronic expansion valve and the second electronic expansion valve are opened, the cooling effect may be poor and the battery and the passenger compartment may not be cooled well, or the battery and the passenger compartment may be cooled excessively to cause energy waste. Therefore, in an embodiment, after the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are both controlled to be opened based on the refrigeration control instruction, on one hand, a first current superheat degree of the battery temperature control system side is obtained, and in response to the first current superheat degree not being equal to a first superheat degree threshold value, the opening degree of the first electronic expansion valve is gradually adjusted according to a first preset step size; and on the other hand, acquiring a second current superheat degree of the air conditioning system side, and adjusting the opening of the second electronic expansion valve according to a second preset step length in response to the second current superheat degree not being equal to a second superheat degree threshold. Determining how the refrigeration effect of the refrigeration system corresponding to the electronic expansion valve is achieved by comparing the magnitude relation between the current superheat degree and the superheat degree threshold value of the electronic expansion valve, and correspondingly adjusting the opening degree of the electronic expansion valve to improve or reduce the refrigeration effect of the refrigeration system; in addition, the opening degree of the electronic expansion valve is adjusted step by step in a step-by-step mode, so that the opening degree of the electronic expansion valve is dynamically adjusted, the adjusting precision is high, and the adjusting mode is simple.
The sizes of the first superheat threshold and the second superheat threshold are not limited, and the first superheat threshold and the second superheat threshold can be specifically set according to actual use requirements; the first superheat threshold value and the second superheat threshold value may be the same or different in size.
In a specific embodiment, in response to the first current superheat degree being greater than a first superheat degree threshold, gradually increasing the opening of the first electronic expansion valve according to a first preset step size; responding to the fact that the first current superheat degree is smaller than a first superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a first preset step length; and responding to the fact that the first current superheat degree is equal to the first superheat degree threshold value, and not adjusting the opening degree of the first electronic expansion valve. When the first current superheat degree of the first electronic expansion valve is larger than a first superheat degree threshold value, the superheat degree of the battery temperature control system side is larger, and the refrigerating effect of the battery temperature control system is poor, so that the opening degree of the first electronic expansion valve is gradually increased by a first preset step length at the moment so as to increase the flow of the introduced refrigerant, thereby improving the refrigerating effect of the battery temperature control system, refrigerating the battery better and avoiding damage of the battery due to overhigh temperature; when the first current superheat degree of the first electronic expansion valve is smaller than a first superheat degree threshold value, the superheat degree of the battery temperature control system side is smaller, and the battery temperature control system excessively refrigerates the battery, so that the opening degree of the first electronic expansion valve is gradually reduced by a first preset step length at the moment so as to reduce the flow of the introduced refrigerant, thereby reducing the refrigeration effect of the battery temperature control system and reducing the energy effect.
The size of the first preset step is not limited, and can be specifically set according to actual use requirements.
In a specific embodiment, in response to the second current superheat degree being greater than a second superheat degree threshold, gradually increasing the opening of the second electronic expansion valve according to a second preset step size; responding to the fact that the second current superheat degree is smaller than a second superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a second preset step length; and responding to the fact that the second current superheat degree is equal to the second superheat degree threshold value, and not adjusting the opening degree of the second electronic expansion valve. When the second current superheat degree of the second electronic expansion valve is larger than a second superheat degree threshold value, the superheat degree of the air conditioning system side is larger, and the refrigerating effect of the air conditioning system is poor, so that the opening degree of the second electronic expansion valve is gradually increased by a second preset step length at the moment to increase the flow of the introduced refrigerant, thereby improving the refrigerating effect of the air conditioning system, refrigerating the passenger cabin better and ensuring the comfort of the passenger cabin; when the second current superheat degree of the second electronic expansion valve is smaller than the second superheat degree threshold value, the superheat degree of the air conditioning system side is smaller, and the air conditioning system excessively refrigerates the passenger cabin, so that the opening degree of the second electronic expansion valve is gradually reduced by a second preset step length at the moment so as to reduce the flow of the introduced refrigerant, thereby reducing the refrigeration effect of the air conditioning system, and reducing the energy consumption while ensuring the comfort of the passenger cabin.
The size of the second preset step is not limited, and the second preset step can be specifically set according to actual use requirements; it should be noted that, the first preset step size and the second preset step size may be the same or different.
When the batteries and the passenger cabins are refrigerated, the comfort of the passenger cabins is not excessively sacrificed while the refrigerating effect of the batteries is ensured, the scientific distribution of the refrigerating capacity of the passenger cabins and the refrigerating capacity of the batteries is realized, and the refrigerating demands of the passenger cabins and the batteries under different working conditions are determined to be satisfied. Therefore, in an embodiment, in response to the adjusted opening of the first electronic expansion valve being the maximum opening of the first electronic expansion valve, and the first current superheat degree being greater than the first superheat degree threshold, the opening of the second electronic expansion valve in the air conditioning system is reduced until the temperature within the passenger compartment is greater than or equal to the preset temperature. That is, when the second electronic expansion valve of the air conditioning system is opened and the maximum amount of refrigerant that can be provided by the battery temperature control system at present is still unavailable, the opening of the first electronic expansion valve is adjusted to reduce the amount of refrigerant provided to the air conditioning system, so that more amount of refrigerant can be provided to the battery temperature control system, the refrigerating effect of the battery temperature control system is improved, and more effective refrigeration of the battery is realized; however, in order to avoid excessively sacrificing the comfort of the passenger compartment, the opening degree of the second electronic expansion valve of the air conditioning system is not adjusted after the temperature in the passenger compartment is greater than or equal to the preset temperature.
The temperature is not limited, and can be specifically set according to actual use requirements. For example, the preset temperature is 28 ℃.
In a specific embodiment, in response to the adjusted opening of the first electronic expansion valve being the maximum opening of the first electronic expansion valve, and the first current superheat degree being greater than the first superheat degree threshold, gradually reducing the opening of the second electronic expansion valve according to a second preset step length until the temperature in the passenger compartment is greater than or equal to a preset temperature. The opening of the second electronic expansion valve is gradually regulated in a step-by-step mode, the opening of the second electronic expansion valve is dynamically regulated, the regulating precision is high, and the regulating mode is simple.
In a specific embodiment, in response to the adjusted opening of the first electronic expansion valve being the maximum opening of the first electronic expansion valve, and the first current superheat degree being greater than the first superheat degree threshold, reducing the opening of the second electronic expansion valve by a second preset step length, and acquiring the temperature in the passenger compartment after a preset period of time; and in response to the temperature in the passenger cabin after the preset time period being less than the preset temperature, taking the reduced opening of the second electronic expansion valve as the opening of the second electronic expansion valve, and re-executing the steps of reducing the opening of the second electronic expansion valve and the follow-up steps by a second preset step length until the temperature in the passenger cabin is greater than the preset temperature.
In one embodiment, when an instruction for controlling the opening of the first electronic expansion valve of the battery temperature control system is received, the opening of the first electronic expansion valve in the battery temperature control system is controlled, and when a high-pressure liquid refrigerant enters an evaporator in the battery cooling system through the first electronic expansion valve, the vaporific refrigerant is converted into a gaseous state under the low pressure condition due to the atomization effect of the first electronic expansion valve, heat is absorbed in the conversion process, and at the moment, the evaporator is cool, and after wind passes, the evaporator becomes cool wind, so that the purpose of refrigerating the battery is achieved.
The new energy automobile adopts unconventional automobile fuel as a power source, and a battery in the automobile is required to support the running, control and the like of the automobile; therefore, as long as the new energy automobile is in use, the battery in the automobile is in a use state, and as long as the battery is in use, heat is generated, and the battery generates heat. Therefore, in order to increase the service life of the battery of the vehicle, in one embodiment, a command for instructing the first electronic expansion valve controlling the battery temperature control system to open is generated based on the vehicle start-up.
Considering that the temperature of the battery is not very high, the battery heating is relatively small to the loss of the battery. Therefore, in other embodiments, the instruction for instructing to control the opening of the first electronic expansion valve of the battery temperature control system is generated when the temperature of the battery is higher than the temperature threshold, that is, the battery is judged to have a refrigeration requirement only when the temperature of the battery is determined to be too high, so that the instruction for instructing to control the opening of the first electronic expansion valve of the battery temperature control system is generated and sent when the temperature of the battery is determined to be higher than the temperature threshold, so that the opening of the first electronic expansion valve in the battery cooling system is timely controlled when the temperature of the battery is too high, the battery is timely refrigerated, the battery is prevented from being damaged due to the too high temperature of the battery, and the service life of the battery is prolonged. The temperature threshold is not limited, and can be specifically set according to actual use requirements.
In other embodiments, the instruction for instructing the first electronic expansion valve controlling the battery temperature control system to open may also be generated based on the start-up of the battery cooling system. That is, when the user turns on the battery cooling system, an instruction for instructing to turn on the first electronic expansion valve of the battery temperature control system is generated and sent, so that the first electronic expansion valve of the battery temperature control system is controlled to be turned on after receiving the instruction for instructing to turn on the first electronic expansion valve of the battery temperature control system, and cooling of the battery is achieved.
Since the battery starts to be cooled after the first electronic expansion valve is opened, the cooling effect may be poor, or the battery may be excessively cooled to cause energy waste. Therefore, in one embodiment, after the first electronic expansion valve in the battery temperature control system is controlled to be opened based on the instruction for instructing the first electronic expansion valve in the battery temperature control system to be opened, a first current superheat degree on the side of the battery temperature control system is obtained; then, in response to the first current superheat degree being greater than a first superheat degree threshold, gradually increasing the opening of the first electronic expansion valve according to a first preset step length; responding to the fact that the first current superheat degree is smaller than a first superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a first preset step length; and responding to the fact that the first current superheat degree is equal to the first superheat degree threshold value, and not adjusting the opening degree of the first electronic expansion valve.
In an embodiment, when an instruction for controlling the opening of the first electronic expansion valve of the air conditioning system is received, the opening of the second electronic expansion valve in the air conditioning system is controlled, and when the high-pressure liquid refrigerant enters the evaporator in the air conditioning system through the second electronic expansion valve, the vaporific refrigerant is converted into a gaseous state under the low pressure condition due to the atomization effect of the second electronic expansion valve, heat is absorbed in the conversion process, the evaporator is cool at the moment, and the air becomes cool air after passing through, so that the purpose of refrigerating the passenger cabin is achieved.
Since the cooling of the passenger compartment is started after the second electronic expansion valve is opened, the cooling effect may be poor, or the passenger compartment may be excessively cooled to cause energy waste. Therefore, in one embodiment, after controlling the second electronic expansion valve in the air conditioning system to be opened based on the instruction for instructing the first electronic expansion valve in the air conditioning system to be opened, a second current superheat degree on the air conditioning system side is obtained; then, in response to the second current superheat degree being greater than a second superheat degree threshold, gradually increasing the opening of the second electronic expansion valve according to a second preset step length; responding to the fact that the second current superheat degree is smaller than a second superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a second preset step length; and responding to the fact that the second current superheat degree is equal to the second superheat degree threshold value, and not adjusting the opening degree of the second electronic expansion valve.
It is contemplated that the use of batteries in lower temperature environments may also cause damage to the batteries and that too low a temperature in the passenger compartment may also cause uncomfortable in-cabin environments. Therefore, in one embodiment, a heating control command is also received, and based on the heating control command, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are controlled to be opened; the battery temperature control system is also used for heating the battery, and the air conditioning system is also used for heating the passenger cabin. That is, when a heating control instruction is received, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are controlled to be opened, so that the purposes of heating the battery and heating the passenger cabin are achieved; that is, when there is a need for heating both the battery and the passenger compartment, both the battery and the passenger compartment can be heated.
Since the battery and the passenger compartment are heated after the first electronic expansion valve and the second electronic expansion valve are opened, the heating effect may be poor and the battery and the passenger compartment may not be heated well, or the battery and the passenger compartment may be heated excessively to cause energy waste. Therefore, in an embodiment, after the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are both controlled to be opened based on the heating control instruction, on one hand, a third current superheat degree of the battery temperature control system side is obtained, and in response to the third current superheat degree not being equal to a third superheat degree threshold value, the opening degree of the first electronic expansion valve is gradually adjusted according to a third preset step size; and on the other hand, acquiring a fourth current superheat degree of the air conditioning system side, and adjusting the opening of the second electronic expansion valve according to a fourth preset step length in response to the fourth current superheat degree not being equal to a fourth superheat degree threshold. Determining how the heating effect of the heating system corresponding to the electronic expansion valve is by comparing the magnitude relation between the current superheat degree and the superheat degree threshold value of the electronic expansion valve, so as to correspondingly adjust the opening degree of the electronic expansion valve to improve or reduce the heating effect of the heating system; in addition, the opening degree of the electronic expansion valve is adjusted step by step in a step-by-step mode, so that the opening degree of the electronic expansion valve is dynamically adjusted, the adjusting precision is high, and the adjusting mode is simple.
The third superheat threshold, the fourth superheat threshold, the third preset step length and the fourth preset step length are not limited, and can be specifically set according to actual use requirements; the third superheat threshold and the fourth superheat threshold may be the same or different, and the third preset step size and the fourth preset step size may be the same or different.
In a specific embodiment, in response to the third current superheat degree being greater than the third superheat degree threshold, gradually reducing the opening of the first electronic expansion valve according to a third preset step size; responding to the fact that the third current superheat degree is smaller than a third superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to a third preset step length; and responding to the fact that the third current superheat degree is equal to the third superheat degree threshold value, and not adjusting the opening degree of the first electronic expansion valve. When the third current superheat degree of the first electronic expansion valve is larger than the third superheat degree threshold value, the superheat degree of the battery temperature control system side is larger, and the heating effect of the battery temperature control system is excessive, so that the opening degree of the first electronic expansion valve is gradually reduced by a third preset step length at the moment, the heating effect of the battery temperature control system is reduced, damage of the battery due to overhigh temperature is avoided, and meanwhile energy consumption is reduced; when the third current superheat degree of the first electronic expansion valve is smaller than the third superheat degree threshold, the superheat degree of the battery temperature control system side is smaller, and the heating effect of the battery temperature control system on the battery is poor, so that the opening degree of the first electronic expansion valve is gradually increased by a third preset step length at the moment, and the heating effect of the battery temperature control system is improved.
In a specific embodiment, in response to the fourth current superheat degree being greater than a fourth superheat degree threshold, gradually reducing the opening of the second electronic expansion valve according to a fourth preset step size; responding to the fact that the fourth current superheat degree is smaller than a fourth superheat degree threshold value, and gradually increasing the opening of the second electronic expansion valve according to a fourth preset step length; and responding to the fourth current superheat degree being equal to a fourth superheat degree threshold value, and not adjusting the opening degree of the second electronic expansion valve. When the fourth current superheat degree of the second electronic expansion valve is larger than a fourth superheat degree threshold value, the fact that the superheat degree of the battery temperature control system side is larger is indicated, and the battery temperature control system is excessively heated, so that the opening degree of the second electronic expansion valve is gradually reduced by a fourth preset step length at the moment, the heating effect of the battery temperature control system is reduced, damage to the battery due to overhigh temperature is avoided, and meanwhile energy consumption is reduced; when the fourth current superheat degree of the second electronic expansion valve is smaller than the fourth superheat degree threshold, the superheat degree of the battery temperature control system side is smaller, and the heating effect of the battery temperature control system on the battery is poorer, so that the opening degree of the second electronic expansion valve is gradually increased by a fourth preset step length at the moment, and the heating effect of the battery temperature control system is improved.
In the above embodiment, the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system are both controlled to open based on the cooling control instruction. Therefore, the battery and the passenger cabin of the vehicle can be simultaneously refrigerated, on one hand, the battery is cooled, the battery is prevented from being damaged due to overhigh temperature, and on the other hand, the passenger cabin can have more comfortable temperature; in addition, the battery can be refrigerated preferentially, so that the battery of the vehicle is prevented from being damaged due to the fact that the temperature is too high, and the influence on the normal use of the vehicle is avoided.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a control device of an electronic expansion valve according to the present application. The control device 20 of the electronic expansion valve comprises a receiving module 21 and a control module 22. The receiving module 21 is used for receiving a refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; the control module 22 is used for controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin.
The control device 20 of the electronic expansion valve further includes an adjusting module 23, where the adjusting module 23 is configured to, after controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction, specifically include: acquiring a first current superheat degree of a battery temperature control system side; responding to the fact that the first current superheat degree is not equal to a first superheat degree threshold value, and gradually adjusting the opening of the first electronic expansion valve according to a first preset step length; obtaining a second current superheat degree of the air conditioning system side; and in response to the second current superheat degree not being equal to the second superheat degree threshold value, gradually adjusting the opening of the second electronic expansion valve according to a second preset step length.
The adjusting module 23 is further configured to reduce the opening of the second electronic expansion valve in the air conditioning system until the temperature in the passenger cabin is greater than or equal to the preset temperature in response to the adjusted opening of the first electronic expansion valve being the maximum opening of the first electronic expansion valve, and the first current superheat degree being greater than the first superheat degree threshold.
The adjusting module 23 is configured to reduce, in response to the adjusted opening of the first electronic expansion valve being the maximum opening of the first electronic expansion valve, the first current superheat degree being greater than a first superheat degree threshold, the opening of the second electronic expansion valve in the air conditioning system until the temperature in the passenger compartment is greater than or equal to a preset temperature, and specifically includes: responding to the adjusted opening degree of the first electronic expansion valve as the maximum opening degree of the first electronic expansion valve, wherein the first current superheat degree is larger than a first superheat degree threshold value, reducing the opening degree of the second electronic expansion valve by a second preset step length, and acquiring the temperature in the passenger cabin after a preset time length; and in response to the temperature in the passenger cabin after the preset time period being less than the preset temperature, taking the reduced opening of the second electronic expansion valve as the opening of the second electronic expansion valve, and re-executing the steps of reducing the opening of the second electronic expansion valve and the follow-up steps by a second preset step length until the temperature in the passenger cabin is greater than or equal to the preset temperature.
The adjusting module 23 is configured to gradually adjust the opening of the first electronic expansion valve according to a first preset step size in response to the first current superheat degree not being equal to the first superheat degree threshold, and specifically includes: responding to the fact that the first current superheat degree is larger than a first superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to a first preset step length; responding to the fact that the first current superheat degree is smaller than a first superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a first preset step length; and the response to the second current superheat degree not being equal to the second superheat degree threshold value, gradually adjusting the opening of the second electronic expansion valve according to a second preset step length, including: responding to the fact that the second current superheat degree is larger than a second superheat degree threshold value, and gradually increasing the opening of the second electronic expansion valve according to a second preset step length; and responding to the fact that the second current superheat degree is smaller than a second superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a second preset step length.
The battery temperature control system is also used for heating the battery, and the air conditioning system is also used for heating the passenger cabin; the control module 22 is further configured to receive a heating control instruction; the heating control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened; and controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction.
Wherein, the adjusting module 23 is further configured to, after controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control command, specifically include: acquiring a third current superheat degree of a battery temperature control system side; responding to the fact that the third current superheat degree is larger than a third superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a third preset step length; responding to the fact that the third current superheat degree is smaller than a third superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to a third preset step length; obtaining a fourth current superheat degree of the air conditioning system side; responding to the fact that the fourth current superheat degree is larger than a fourth superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a fourth preset step length; and in response to the fourth current superheat degree being smaller than a fourth superheat degree threshold value, gradually increasing the opening of the second electronic expansion valve according to a fourth preset step length.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a computer readable storage medium according to the present application. The computer readable storage medium 30 of the embodiment of the present application stores program instructions 31, which program instructions 31 when executed implement the method provided by any embodiment and any non-conflicting combination of the control method of the electronic expansion valve of the present application. Wherein the program instructions 31 may form a program file stored in the above-mentioned computer readable storage medium 30 in the form of a software product for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the application. And the aforementioned computer-readable storage medium 30 includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes, or a terminal device such as a computer, a server, a mobile phone, a tablet, or the like.
The application also provides a temperature control system, which is used for executing the control method of the electronic expansion valve, so as to control the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction. Therefore, the battery and the passenger cabin of the vehicle can be simultaneously refrigerated, on one hand, the battery is cooled, the battery is prevented from being damaged due to overhigh temperature, and on the other hand, the passenger cabin can have more comfortable temperature; in addition, the battery can be refrigerated preferentially, so that the battery of the vehicle is prevented from being damaged due to the fact that the temperature is too high, and the influence on the normal use of the vehicle is avoided.
If the technical scheme of the application relates to personal information, the product applying the technical scheme of the application clearly informs the personal information processing rule before processing the personal information and obtains the autonomous agreement of the individual. If the technical scheme of the application relates to sensitive personal information, the product applying the technical scheme of the application obtains individual consent before processing the sensitive personal information, and simultaneously meets the requirement of 'explicit consent'. For example, a clear and remarkable mark is set at a personal information acquisition device such as a camera to inform that the personal information acquisition range is entered, personal information is acquired, and if the personal voluntarily enters the acquisition range, the personal information is considered as consent to be acquired; or on the device for processing the personal information, under the condition that obvious identification/information is utilized to inform the personal information processing rule, personal authorization is obtained by popup information or a person is requested to upload personal information and the like; the personal information processing rule may include information such as a personal information processor, a personal information processing purpose, a processing mode, and a type of personal information to be processed.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims (10)

1. A method of controlling an electronic expansion valve, the method comprising:
receiving a refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened;
based on the refrigeration control instruction, controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin.
2. The method of claim 1, wherein after the controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to both open based on the cooling control command, the method further comprises:
acquiring a first current superheat degree of the battery temperature control system side;
responding to the fact that the first current superheat degree is not equal to a first superheat degree threshold value, and gradually adjusting the opening of the first electronic expansion valve according to a first preset step length;
obtaining a second current superheat degree of the air conditioning system side;
and in response to the second current superheat degree not being equal to a second superheat degree threshold, gradually adjusting the opening of the second electronic expansion valve according to a second preset step length.
3. The method according to claim 2, wherein the method further comprises:
and responding to the adjusted opening degree of the first electronic expansion valve to be the maximum opening degree of the first electronic expansion valve, wherein the first current superheat degree is larger than the first superheat degree threshold value, and reducing the opening degree of a second electronic expansion valve in the air conditioning system until the temperature in the passenger cabin is larger than or equal to a preset temperature.
4. The method of claim 3, wherein the reducing the opening of the second electronic expansion valve in the air conditioning system until the temperature within the passenger compartment is greater than or equal to a preset temperature in response to the adjusted opening of the first electronic expansion valve being a maximum opening of the first electronic expansion valve and the first current superheat being greater than the first superheat threshold comprises:
responding to the adjusted opening degree of the first electronic expansion valve as the maximum opening degree of the first electronic expansion valve, wherein the first current superheat degree is larger than the first superheat degree threshold value, reducing the opening degree of the second electronic expansion valve by a second preset step length, and acquiring the temperature in the passenger cabin after a preset duration;
and in response to the temperature in the passenger cabin after the preset time period is less than the preset temperature, taking the reduced opening of the second electronic expansion valve as the opening of the second electronic expansion valve, and re-executing the steps of reducing the opening of the second electronic expansion valve by the second preset step length and the follow-up steps until the temperature in the passenger cabin is greater than or equal to the preset temperature.
5. The method of claim 2, wherein the step of adjusting the opening of the first electronic expansion valve in a first preset step in response to the first current superheat not being equal to a first superheat threshold comprises:
responding to the fact that the first current superheat degree is larger than the first superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to the first preset step length;
responding to the fact that the first current superheat degree is smaller than the first superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to the first preset step length;
and responding to the second current superheat degree not being equal to the second superheat degree threshold, and gradually adjusting the opening of the second electronic expansion valve according to a second preset step length, wherein the method comprises the following steps:
responding to the second current superheat degree being larger than the second superheat degree threshold value, and gradually increasing the opening of the second electronic expansion valve according to the second preset step length;
and responding to the second current superheat degree is smaller than the second superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to the second preset step length.
6. The method of claim 1, wherein the battery temperature control system is further configured to heat a battery, and the air conditioning system is further configured to heat a passenger compartment; the method further comprises the steps of:
receiving a heating control instruction; the heating control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened;
and controlling a first electronic expansion valve in the battery temperature control system and a second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction.
7. The method of claim 6, wherein after the controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to both open based on the cooling control command, the method further comprises:
acquiring a third current superheat degree of the battery temperature control system side;
responding to the fact that the third current superheat degree is larger than a third superheat degree threshold value, and gradually reducing the opening of the first electronic expansion valve according to a third preset step length;
responding to the third current superheat degree being smaller than the third superheat degree threshold value, and gradually increasing the opening of the first electronic expansion valve according to the third preset step length;
obtaining a fourth current superheat degree of the air conditioning system side;
responding to the fourth current superheat degree being larger than a fourth superheat degree threshold value, and gradually reducing the opening of the second electronic expansion valve according to a fourth preset step length;
and responding to the fourth current superheat degree is smaller than the fourth superheat degree threshold value, and gradually increasing the opening of the second electronic expansion valve according to the fourth preset step length.
8. A control device of an electronic expansion valve, the device comprising:
the receiving module is used for receiving the refrigeration control instruction; the refrigeration control instruction is used for indicating to control the first electronic expansion valve of the battery temperature control system and the second electronic expansion valve of the air conditioning system to be opened;
the control module is used for controlling the first electronic expansion valve in the battery temperature control system and the second electronic expansion valve in the air conditioning system to be opened based on the refrigeration control instruction; the battery temperature control system is used for refrigerating the battery, and the air conditioning system is used for refrigerating the passenger cabin.
9. A temperature control system for performing the method of any one of claims 1-7.
10. A computer readable storage medium storing program instructions executable by a processor for implementing the method of any one of claims 1-7.
CN202310274968.2A 2023-03-17 2023-03-17 Control method and device for electronic expansion valve, temperature control system and storage medium Pending CN116872670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310274968.2A CN116872670A (en) 2023-03-17 2023-03-17 Control method and device for electronic expansion valve, temperature control system and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310274968.2A CN116872670A (en) 2023-03-17 2023-03-17 Control method and device for electronic expansion valve, temperature control system and storage medium

Publications (1)

Publication Number Publication Date
CN116872670A true CN116872670A (en) 2023-10-13

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Application Number Title Priority Date Filing Date
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Country Link
CN (1) CN116872670A (en)

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