CN115230431A - Refrigerant loop control method and device - Google Patents
Refrigerant loop control method and device Download PDFInfo
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- CN115230431A CN115230431A CN202210968426.0A CN202210968426A CN115230431A CN 115230431 A CN115230431 A CN 115230431A CN 202210968426 A CN202210968426 A CN 202210968426A CN 115230431 A CN115230431 A CN 115230431A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 138
- 238000005057 refrigeration Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000004590 computer program Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
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- 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
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- 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
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- 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
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- 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
- B60H2001/003—Component temperature regulation using an air flow
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- 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
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- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The application provides a refrigerant loop control method and a device, and the method comprises the following steps: when the passenger compartment is cooled and opened, the passenger compartment side refrigeration electromagnetic valve in the refrigerant loop is opened, so that the thermostatic expansion valve in the refrigerant loop can be mechanically controlled according to the state of the refrigerant; or when the battery is cooled and opened, opening a battery cooling side electromagnetic valve in the refrigerant loop so that the thermostatic expansion valve performs mechanical control according to the state of the refrigerant; or in the battery cooling and opening process and when the passenger compartment needs to be refrigerated, the refrigerating electromagnetic valve at the passenger compartment side is opened; or in the passenger compartment cooling and opening process and when the battery needs to be cooled, acquiring the target temperature of the evaporator and the actual temperature of the evaporator, and controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator. Therefore, the method can balance battery cooling and passenger compartment cooling, avoid the impact of battery cooling opening on the passenger compartment side, and is beneficial to improving the comfort experience of the whole vehicle.
Description
Technical Field
The application relates to the technical field of heat management, in particular to a refrigerant loop control method and device.
Background
At present, with the popularization of electric vehicles, the performance of electric vehicles at high temperatures is attracting more attention. In the aspect of vehicle heat management, in the refrigerating process of the passenger compartment at high temperature, the battery needs to be cooled when the temperature of the battery is high, and at the moment, because the state of a refrigerant system changes, a cooling circuit at the battery side is suddenly opened, so that great influence is generated on the comfort impact of the passenger compartment. Therefore, the existing method cannot balance battery cooling and passenger compartment cooling, so that the comfort experience of the whole vehicle is reduced.
Disclosure of Invention
An object of the embodiment of the application is to provide a refrigerant loop control method and device, which can balance battery cooling and passenger compartment cooling, avoid the impact of battery cooling opening on the passenger compartment side, and are beneficial to improving the comfort experience of the whole vehicle.
A first aspect of the embodiments of the present application provides a refrigerant circuit control method, including:
when the passenger compartment is cooled and opened, opening a passenger compartment side refrigeration electromagnetic valve in the refrigerant loop to enable a thermostatic expansion valve in the refrigerant loop to perform mechanical control according to the state of the refrigerant;
when the battery is cooled and started, a battery cooling side electromagnetic valve in the refrigerant loop is started, so that the thermostatic expansion valve is mechanically controlled according to the state of the refrigerant;
in the process of cooling and opening a battery and when the passenger compartment needs to be refrigerated, opening a refrigerating electromagnetic valve at the side of the passenger compartment;
in the passenger compartment cooling and opening process and when the battery needs to be cooled, acquiring the target temperature of an evaporator and the actual temperature of the evaporator, and controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator.
In the implementation process, when the passenger compartment is cooled and opened, the method can open the passenger compartment side refrigeration electromagnetic valve in the refrigerant loop so as to enable the thermostatic expansion valve in the refrigerant loop to perform mechanical control according to the state of the refrigerant; or when the battery is cooled and opened, opening a battery cooling side electromagnetic valve in the refrigerant loop so that the thermostatic expansion valve performs mechanical control according to the state of the refrigerant; or in the battery cooling and opening process and when the passenger compartment needs to be refrigerated, the passenger compartment side refrigeration electromagnetic valve is opened; or in the passenger compartment cooling opening process and when the battery needs to be cooled, acquiring the target temperature of the evaporator and the actual temperature of the evaporator, and controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator. Therefore, by implementing the implementation mode, the battery cooling and the passenger compartment cooling can be balanced, the impact of the battery cooling opening on the passenger compartment side is avoided, and the improvement of the comfort experience of the whole vehicle is facilitated.
Further, the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature includes:
calculating a temperature difference between the target evaporator temperature and the actual evaporator temperature;
and controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy.
Further, the controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy comprises:
and when the temperature difference value is greater than a first temperature threshold value, namely when the passenger compartment side is in a temperature reduction stage, controlling the electromagnetic valve at the battery cooling side to be opened all the time in a first time period before the battery cooling is opened.
Further, the controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy comprises:
when the temperature difference is larger than a second temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a first preset start-stop period in a second time period before the cooling of the battery is started; wherein the second temperature threshold is less than the first temperature threshold.
Further, the controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy comprises:
when the temperature difference is larger than a third temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a second preset start-stop period in a third time period before the cooling of the battery is started; wherein the third temperature threshold is less than the second temperature threshold.
Further, the controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy comprises:
when the temperature difference is larger than a fourth temperature threshold value, namely the passenger compartment side is already in a cooling stable stage, controlling the electromagnetic valve at the battery cooling side to periodically start and stop according to a third preset start-stop period in a fourth time period before the battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.
A second aspect of the embodiments of the present application provides a refrigerant circuit control device, including:
the first opening unit is used for opening a passenger compartment side refrigeration electromagnetic valve in the refrigerant loop when the passenger compartment is cooled and opened, so that the control unit can mechanically control a thermostatic expansion valve in the refrigerant loop according to the state of the refrigerant;
the second opening unit is used for opening a battery cooling side electromagnetic valve in the refrigerant loop when the battery is cooled and opened, so that the control unit can mechanically control the thermal expansion valve according to the state of the refrigerant;
the third opening unit is used for opening a refrigerating electromagnetic valve at the passenger compartment side when the battery is cooled and opened and the passenger compartment needs to be refrigerated, so that the control unit can mechanically control the thermostatic expansion valve according to the state of a refrigerant;
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the target temperature of an evaporator and the actual temperature of the evaporator in the process of cooling and starting a passenger compartment and when a battery needs to be cooled;
the control unit is also used for controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target evaporator temperature and the actual evaporator temperature.
In the implementation process, when the passenger compartment is cooled and opened through the first opening unit, the passenger compartment side refrigeration electromagnetic valve in the refrigerant loop is opened, so that the control unit can mechanically control the thermostatic expansion valve in the refrigerant loop according to the state of the refrigerant; or when the battery is cooled and opened through the second opening unit, the electromagnetic valve at the cooling side of the battery in the refrigerant loop is opened, so that the control unit can mechanically control the thermostatic expansion valve according to the state of the refrigerant; or in the battery cooling and opening process and when the passenger compartment needs to be refrigerated through the third opening unit, the passenger compartment side refrigeration electromagnetic valve is opened so that the control unit can mechanically control the thermostatic expansion valve according to the state of the refrigerant; or the target temperature of the evaporator and the actual temperature of the evaporator are obtained by the obtaining unit in the process of cooling and starting the passenger compartment and when the battery needs to be cooled; and then the control unit controls the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator. Therefore, by implementing the implementation mode, the battery cooling and the passenger compartment cooling can be balanced, the impact of the battery cooling opening on the passenger compartment side is avoided, and the improvement of the comfort experience of the whole vehicle is facilitated.
Further, the control unit includes:
the calculating subunit is used for calculating the temperature difference between the target evaporator temperature and the actual evaporator temperature;
and the control subunit is used for controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy.
Further, the control subunit is specifically configured to, when the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a temperature reduction stage, control the battery cooling side electromagnetic valve to be always opened within a first time period before the battery cooling is opened.
Further, the control subunit is specifically configured to, when the temperature difference is greater than a second temperature threshold, control the battery cooling-side electromagnetic valve to periodically start and stop according to a first preset start-stop cycle in a second time period before the battery is cooled and started; wherein the second temperature threshold is less than the first temperature threshold.
Further, the control subunit is specifically configured to, when the temperature difference is greater than a third temperature threshold, control the battery cooling-side electromagnetic valve to periodically start and stop according to a second preset start-stop cycle in a third time period before the battery is cooled and started; wherein the third temperature threshold is less than the second temperature threshold.
Further, the control subunit is specifically configured to, when the temperature difference is greater than a fourth temperature threshold, that is, when the passenger compartment side is already in the cooling stable stage, control the battery cooling side electromagnetic valve to periodically start and stop according to a third preset start-stop period in a fourth time period before the battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.
A third aspect of the embodiments of the present application provides an electronic device, including a memory and a processor, where the memory is configured to store a computer program, and the processor runs the computer program to enable the electronic device to execute the refrigerant circuit control method according to any one of the first aspect of the embodiments of the present application.
A fourth aspect of the present embodiment provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are read and executed by a processor, the method for controlling a refrigerant circuit according to any of the first aspect of the present embodiment is performed.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a refrigerant circuit control method according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a refrigerant circuit control device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a refrigerant circuit control according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a refrigerant circuit control method according to an embodiment of the present disclosure. The refrigerant loop control method comprises the following steps:
s101, obtaining a passenger compartment cooling state and a battery cooling state.
In the present embodiment, the passenger compartment cooling state includes two states of on and off.
In this embodiment, the battery cooling state includes two states of on and off.
In the present embodiment, the combination of the two states of the passenger compartment cooling state and the battery cooling state includes: the cooling state of the passenger compartment is started, but the cooling state of the battery is not started; the cooling state of the passenger compartment is not started, but the cooling state of the battery is started; the cooling state of the passenger compartment is started first, and the cooling state of the battery is started later; the cooling state of the battery is started first, and the cooling state of the passenger compartment is started later.
In the present embodiment, the method has the following different refrigerant circuit control modes for different passenger compartment cooling states and battery cooling states:
when the passenger compartment is cooled and opened, the passenger compartment side refrigeration electromagnetic valve in the refrigerant loop is opened, so that the thermostatic expansion valve in the refrigerant loop performs mechanical control according to the state of the refrigerant;
when the battery is cooled and started, a battery cooling side electromagnetic valve in a refrigerant loop is started, so that the thermostatic expansion valve is mechanically controlled according to the state of the refrigerant;
in the process of cooling and opening the battery and when the passenger compartment needs to be refrigerated, the refrigerating electromagnetic valve at the side of the passenger compartment is opened;
in the passenger compartment cooling opening process and when the battery needs to be cooled, the target temperature of the evaporator and the actual temperature of the evaporator are obtained, and the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve are controlled according to the target temperature of the evaporator and the actual temperature of the evaporator.
S102, in the cooling starting process of the passenger compartment and when the battery needs to be cooled, acquiring the target temperature of the evaporator and the actual temperature of the evaporator.
S103, calculating a temperature difference value between the target temperature of the evaporator and the actual temperature of the evaporator, and triggering and executing any one of the steps S104-S107 according to the temperature difference value.
In this embodiment, the temperature difference calculation formula is as follows:
△T_evap＝T_evap_act-T_evap_target；
wherein, T _ evap _ target is the target temperature of the evaporator, and T _ evap _ act is the actual temperature of the evaporator.
And S104, when the temperature difference value is larger than a first temperature threshold value, namely the passenger compartment side is in a temperature reduction stage, controlling the electromagnetic valve at the battery cooling side to be opened all the time in a first time period before the battery cooling is opened.
In this embodiment, the step may be specifically to control the battery cooling side electromagnetic valve SOV _ teller to be always opened when Δ T _ evap is greater than 20, that is, when the passenger compartment side is in the cooling stage, and T is less than 3min before the battery cooling is opened.
S105, when the temperature difference value is larger than a second temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a first preset start-stop period in a second time period before the cooling start of the battery; wherein the second temperature threshold is less than the first temperature threshold.
In this embodiment, the step may be specifically that when Δ T _ evap is greater than 10, within T < 3min before the battery is cooled and opened, the battery cooling side electromagnetic valve SOV _ teller is periodically started and stopped, and the period of opening the electromagnetic valve SOV _ teller in 5s and closing the electromagnetic valve SOV _ teller in 1s is continuously executed for 3min;
s106, when the temperature difference value is larger than a third temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a second preset start-stop period in a third time period before the cooling of the battery is started; wherein the third temperature threshold is less than the second temperature threshold.
In this embodiment, the step may be specifically that when Δ T _ evap > 5, and T is less than 3min before the battery is cooled and opened, the battery cooling side electromagnetic valve SOV _ teller is periodically turned on and off, and the period of turning on the electromagnetic valve SOV _ teller for 3s and turning off the electromagnetic valve SOV _ teller for 3s is continuously executed for 3min.
S107, when the temperature difference value is larger than a fourth temperature threshold value, namely the passenger compartment side is already in a cooling stable stage, controlling the battery cooling side electromagnetic valve to periodically start and stop according to a third preset start-stop period in a fourth time period before the battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.
In this embodiment, the step may be specifically that when Δ T _ evap < 3, that is, the passenger compartment side is already in a stable stage, and at this time, the battery cooling side solenoid valve SOV _ teller is periodically turned on and off within T < 3min before the battery cooling is turned on, and 3mi is continuously performed in a period of 1s for opening the solenoid valve SOV _ teller and 5s for closing the solenoid valve SOV _ teller.
In the embodiment, the method is applied to the refrigerating process of the passenger compartment at high temperature, the battery needs to be cooled when the temperature is high, and at the moment, because the state of a refrigerant system changes, a cooling loop on the battery side is suddenly opened, so that the comfort of the passenger compartment is influenced greatly.
For example, in order to avoid the impact of the cooling opening of the battery on the passenger compartment side, the method realizes the accurate control of the refrigerant by a strategy of frequently switching on and off the refrigerant electromagnetic valve. Wherein, the on-off frequency can be processed differently according to the temperature of the evaporator at the evaporator side.
Specifically, when the battery cooling start time t = =0s, the determination is made as follows:
(1) when the delta T _ evap is more than 20, namely the passenger compartment side is in a cooling stage, and the battery cooling side electromagnetic valve SOV _ teller is always opened within T less than 3min before the battery is cooled and opened;
(2) when delta T _ evap is more than 10, periodically starting and stopping the battery cooling side electromagnetic valve SOV _ miller within T less than 3min before the battery is cooled and opened, and continuously executing for 3min in a period of opening the electromagnetic valve SOV _ miller for 5s and closing the electromagnetic valve SOV _ miller for 1 s;
(3) when delta T _ evap is larger than 5, the battery cooling side electromagnetic valve SOV _ teller is started and stopped periodically within T smaller than 3min before the battery is cooled and opened, and the period of opening the electromagnetic valve SOV _ teller by 3s and closing the electromagnetic valve SOV _ teller by 3s is continuously executed for 3min;
(4) when delta T _ evap is less than 3, namely the passenger compartment side is already in a stable stage, and at the moment, the battery cooling side electromagnetic valve SOV _ teller is started and stopped periodically within T less than 3min before the battery cooling is opened, and the period of opening the electromagnetic valve SOV _ teller by 1s and closing the electromagnetic valve SOV _ teller by 5s is continuously executed for 3min.
In this embodiment, the execution subject of the method may be a computing device such as a computer and a server, and is not limited in this embodiment.
In this embodiment, an execution subject of the method may also be an intelligent device such as a smart phone and a tablet computer, which is not limited in this embodiment.
Therefore, the refrigerant loop control method described in this embodiment can avoid the impact of the battery cooling on the passenger compartment side, and realize the change of refrigerant flow under different double-evaporation systems by controlling the on-off time of the refrigerant electromagnetic valve, and realize the accurate control of refrigerant flow, thereby achieving the same effect as an electronic expansion valve system, and enabling a user not to feel the change impact of the temperature in the vehicle, so as to reduce various influences to the minimum.
Example 2
Please refer to fig. 2, fig. 2 is a schematic structural diagram of a refrigerant circuit control device according to an embodiment of the present disclosure. As shown in fig. 2, the refrigerant circuit control device includes:
the first opening unit 210 is configured to open a passenger compartment side refrigeration solenoid valve in the refrigerant circuit when the passenger compartment is cooled and opened, so that the control unit 250 performs mechanical control on a thermostatic expansion valve in the refrigerant circuit according to a state of a refrigerant;
a second opening unit 220, configured to open a battery cooling-side electromagnetic valve in the refrigerant circuit when the battery is cooled and opened, so that the control unit 250 performs mechanical control on the thermal expansion valve according to the state of the refrigerant;
the third opening unit 230 is configured to, in a battery cooling opening process and when the passenger compartment needs to be cooled, open a passenger compartment side cooling electromagnetic valve, so that the control unit 250 performs mechanical control on the thermostatic expansion valve according to a state of a refrigerant;
an obtaining unit 240, configured to obtain a target evaporator temperature and an actual evaporator temperature when the passenger compartment is cooled and started and the battery needs to be cooled;
and the control unit 250 is also used for controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator.
As an alternative embodiment, the control unit 250 includes:
a calculation subunit 251 for calculating a temperature difference between the evaporator target temperature and the evaporator actual temperature;
and the control subunit 252 is configured to control the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference and a preset refrigerant electromagnetic valve on-off strategy.
As an alternative embodiment, the control subunit 252 is specifically configured to control the battery cooling-side solenoid valve to be opened all the time during a first time period before the battery cooling is opened when the temperature difference is greater than the first temperature threshold value, that is, when the passenger compartment side is in the cooling stage.
As an optional implementation manner, the control subunit 252 is further specifically configured to control the battery cooling-side electromagnetic valve to periodically start and stop according to a first preset start-stop cycle in a second time period before the battery is cooled and started when the temperature difference is greater than a second temperature threshold; wherein the second temperature threshold is less than the first temperature threshold.
As an optional implementation manner, the control subunit 252 is further specifically configured to control the battery cooling-side electromagnetic valve to start and stop periodically according to a second preset start-stop cycle in a third time period before the battery is cooled and started when the temperature difference value is greater than a third temperature threshold; wherein the third temperature threshold is less than the second temperature threshold.
As an alternative embodiment, the control subunit 252 is further configured to, when the temperature difference is greater than the fourth temperature threshold, that is, when the passenger compartment side is already in the cooling stable stage, control the battery cooling side electromagnetic valve to start and stop periodically according to a third preset start-stop period in a fourth time period before the battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.
Referring to fig. 3, fig. 3 shows a structural schematic diagram of a refrigerant circuit. Wherein, each part in this refrigerant circuit is described as follows:
(1) a compressor: providing a power source for the refrigeration system;
(2) battery cooler, beller: the heat exchanger is used for exchanging heat between the refrigerant and the cooling liquid to cool the battery when being coupled with the air conditioning system;
(3) a condenser: the gaseous refrigerant is converted into liquid, and heat is transferred to the air to release heat;
(4) an evaporator: the low-temperature liquid refrigerant passes through the evaporator to exchange heat with air in the vehicle, and is gasified to absorb heat, so that the refrigerating effect is achieved;
(5) battery cooling side solenoid valve: the SOV is an electric control valve (normally open type) and realizes the on-off of a refrigerant on the cooling side of the battery;
(6) an electromagnetic valve at the evaporator side: the SOV is an electric control valve (normally open type) and realizes the on-off of a refrigerant at the evaporator side;
(7) battery cooling side thermal expansion valve: the TXV adaptively adjusts the flow of a refrigerant passing through a battery cooler according to the superheat degree;
(8) evaporator side thermostatic expansion valve: the TXV adaptively adjusts the flow of the refrigerant passing through the evaporator according to the superheat degree;
(9) refrigerant pipeline: each part in the refrigerant loop is communicated, and the refrigerant flows in the whole system, so that the refrigeration function is realized.
In this embodiment, for the explanation of the refrigerant circuit control device, reference may be made to the description in embodiment 1, and details are not repeated in this embodiment.
It can be seen that, the refrigerant circuit control device described in this embodiment can avoid the impact of the battery cooling opening on the passenger compartment side, and realize the change of refrigerant flow under different double-evaporation systems by controlling the on-off time of the refrigerant solenoid valve, and realize the accurate control of refrigerant flow, thereby achieving the same effect as an electronic expansion valve system, and enabling a user not to feel the change impact of the temperature in the vehicle, so as to reduce various influences to the minimum.
An embodiment of the present application provides an electronic device, which includes a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the refrigerant circuit control method in embodiment 1 of the present application.
An embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are read and executed by a processor, the method for controlling a refrigerant circuit in embodiment 1 of the present application is executed.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A refrigerant circuit control method is characterized by comprising the following steps:
when the passenger compartment is cooled and opened, opening a passenger compartment side refrigeration electromagnetic valve in the refrigerant loop to enable a thermostatic expansion valve in the refrigerant loop to perform mechanical control according to the state of the refrigerant; or,
when the battery is cooled and started, starting a battery cooling side electromagnetic valve in the refrigerant loop so as to enable the thermal expansion valve to perform mechanical control according to the state of the refrigerant; or,
in the process of cooling and opening a battery and when the passenger compartment needs to be refrigerated, opening a refrigerating electromagnetic valve at the side of the passenger compartment; or,
in the passenger compartment cooling and opening process and when a battery needs to be cooled, acquiring the target temperature of an evaporator and the actual temperature of the evaporator, and controlling a passenger compartment side refrigeration electromagnetic valve and a battery cooling side electromagnetic valve according to the target temperature of the evaporator and the actual temperature of the evaporator.
2. The refrigerant circuit control method according to claim 1, wherein the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve in accordance with the evaporator target temperature and the evaporator actual temperature includes:
calculating a temperature difference between the target evaporator temperature and the actual evaporator temperature;
and controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy.
3. The refrigerant circuit control method according to claim 2, wherein the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve according to the temperature difference value and a preset refrigerant solenoid valve on-off strategy includes:
and when the temperature difference value is greater than a first temperature threshold value, namely when the passenger compartment side is in a temperature reduction stage, controlling the electromagnetic valve at the battery cooling side to be opened all the time in a first time period before the battery cooling is opened.
4. The refrigerant circuit control method according to claim 3, wherein the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve according to the temperature difference value and a preset refrigerant solenoid valve on-off strategy includes:
when the temperature difference is larger than a second temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a first preset start-stop period in a second time period before the cooling of the battery is started; wherein the second temperature threshold is less than the first temperature threshold.
5. The refrigerant circuit control method according to claim 4, wherein the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve according to the temperature difference value and a preset refrigerant solenoid valve on-off strategy includes:
when the temperature difference is larger than a third temperature threshold value, controlling the electromagnetic valve at the cooling side of the battery to periodically start and stop according to a second preset start-stop period in a third time period before the cooling of the battery is started; wherein the third temperature threshold is less than the second temperature threshold.
6. The refrigerant circuit control method according to claim 5, wherein the controlling the passenger compartment side refrigeration solenoid valve and the battery cooling side solenoid valve according to the temperature difference value and a preset refrigerant solenoid valve on-off strategy includes:
when the temperature difference is larger than a fourth temperature threshold value, namely the passenger compartment side is already in a cooling stable stage, controlling the electromagnetic valve at the battery cooling side to periodically start and stop according to a third preset start-stop period in a fourth time period before the battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.
7. A refrigerant circuit control device, comprising:
the first opening unit is used for opening a passenger compartment side refrigeration electromagnetic valve in the refrigerant loop when the passenger compartment is cooled and opened, so that the control unit can perform mechanical control on a thermostatic expansion valve in the refrigerant loop according to the state of a refrigerant;
the second opening unit is used for opening a battery cooling side electromagnetic valve in the refrigerant loop when the battery is cooled and opened, so that the control unit can perform mechanical control on the thermal expansion valve according to the state of the refrigerant;
the third opening unit is used for opening a refrigerating electromagnetic valve at the passenger compartment side when the battery is cooled and opened and the passenger compartment needs to be refrigerated, so that the control unit can mechanically control the thermostatic expansion valve according to the state of a refrigerant;
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the target temperature of an evaporator and the actual temperature of the evaporator in the process of cooling and starting a passenger compartment and when a battery needs to be cooled;
the control unit is also used for controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the target evaporator temperature and the actual evaporator temperature.
8. The refrigerant circuit control device according to claim 7, wherein the control unit comprises:
the calculating subunit is used for calculating the temperature difference between the target evaporator temperature and the actual evaporator temperature;
and the control subunit is used for controlling the passenger compartment side refrigeration electromagnetic valve and the battery cooling side electromagnetic valve according to the temperature difference value and a preset refrigerant electromagnetic valve on-off strategy.
9. An electronic device, comprising a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to make the electronic device execute the refrigerant circuit control method according to any one of claims 1 to 6.
10. A readable storage medium, wherein computer program instructions are stored therein, and when the computer program instructions are read and executed by a processor, the method for controlling a refrigerant circuit according to any one of claims 1 to 6 is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210968426.0A CN115230431A (en) | 2022-08-12 | 2022-08-12 | Refrigerant loop control method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210968426.0A CN115230431A (en) | 2022-08-12 | 2022-08-12 | Refrigerant loop control method and device |
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| CN115230431A true CN115230431A (en) | 2022-10-25 |
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| CN202210968426.0A Pending CN115230431A (en) | 2022-08-12 | 2022-08-12 | Refrigerant loop control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923449A (en) * | 2023-01-30 | 2023-04-07 | 成都赛力斯科技有限公司 | New energy vehicle refrigerant system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923449A (en) * | 2023-01-30 | 2023-04-07 | 成都赛力斯科技有限公司 | New energy vehicle refrigerant system and control method |
| CN115923449B (en) * | 2023-01-30 | 2024-04-19 | 重庆赛力斯凤凰智创科技有限公司 | New energy vehicle refrigerant system and control method |
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