CN117052643B - Control method and control system of electric compressor, air conditioning system and vehicle - Google Patents
Control method and control system of electric compressor, air conditioning system and vehicle Download PDFInfo
- Publication number
- CN117052643B CN117052643B CN202311313228.1A CN202311313228A CN117052643B CN 117052643 B CN117052643 B CN 117052643B CN 202311313228 A CN202311313228 A CN 202311313228A CN 117052643 B CN117052643 B CN 117052643B
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- temperature
- electric compressor
- preset
- exhaust temperature
- exhaust
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004378 air conditioning Methods 0.000 title claims abstract description 14
- 238000004590 computer program Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- 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
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides a control method and a control system of an electric compressor, an air conditioning system and a vehicle, and relates to the technical field of vehicles. The control method of the electric compressor comprises the following steps: acquiring the exhaust temperature of the electric compressor; when the exhaust temperature is greater than or equal to the first preset temperature, judging the relation between the exhaust temperature and the second preset temperature, wherein the second preset temperature is greater than the first preset temperature; and if the exhaust temperature is less than the second preset temperature, controlling the motor-driven compressor to work for a preset time period and then stopping the motor-driven compressor. According to the invention, the motor compressor is controlled to work for a preset period of time and then is stopped, so that the normal work of the motor compressor is ensured not to be influenced by the high temperature of a cabin, and the motor compressor can continue to run within the bearable range, so that the motor compressor can be exerted to the maximum, and the overall running effect of the motor compressor is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and system of an electric compressor, an air conditioning system and a vehicle.
Background
In the automotive field, air conditioning systems have a great impact on the environment within the vehicle. Among them, the electric compressor is one of the most important components in an air conditioning system, and in order to ensure stable operation of the electric compressor, it is generally necessary to set a limit on the maximum discharge temperature that the electric compressor can withstand. The maximum exhaust temperature of the electric compressor is usually monitored through a temperature sensor on a high-pressure pipeline at the whole vehicle end, and when the exhaust temperature of the electric compressor is too high, the electric compressor is automatically cut off, so that the internal structure of the electric compressor is protected, and the electric compressor is prevented from being damaged.
In the related art, the motor-driven compressor is prevented from being damaged by limiting the motor-driven compressor discharge temperature, for example, the limited temperature is set to 125 ℃. However, in some hybrid motor vehicles, the cabin temperature of the engine is too high, which affects the measured exhaust temperature of the electric compressor, and the electric compressor may be stopped without reaching the corresponding temperature, so that the electric compressor is over-protected, and the capacity of the air conditioning system cannot be maximized, so that the electric compressor becomes a bottleneck of the whole system.
Disclosure of Invention
The invention solves the technical problem of how to improve the operation effect of the electric compressor at a higher exhaust temperature.
In order to solve the technical problems, the invention provides a control method and a control system of an electric compressor, an air conditioning system and a vehicle.
In a first aspect, the present invention provides a control method of an electric compressor, including:
Acquiring the exhaust temperature of the electric compressor;
when the exhaust temperature is greater than or equal to a first preset temperature, judging the relation between the exhaust temperature and a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;
and if the exhaust temperature is smaller than the second preset temperature, controlling the motor-driven compressor to work for a preset time period and then stopping the motor-driven compressor.
Optionally, if the exhaust temperature is less than the second preset temperature, controlling the motor-driven compressor to operate for a preset period of time and then stop the motor-driven compressor comprises:
if the exhaust temperature is smaller than the second preset temperature, controlling the electric compressor to work and starting timing to obtain timing duration;
And when the timing time is longer than or equal to the preset time, controlling the electric compressor to stop.
Optionally, the control method of the electric compressor further includes:
And when the timing duration is smaller than the preset duration and the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
Optionally, the control method of the electric compressor further includes:
and determining the preset duration according to the exhaust temperature.
Optionally, the determining the preset duration according to the exhaust temperature includes:
when the exhaust temperature is the first preset temperature, setting the preset duration as a standard duration;
setting the preset duration to 0 when the exhaust temperature is the second preset temperature;
And when the exhaust temperature is greater than the first preset temperature and less than the second preset temperature, determining the preset duration according to linear interpolation of the exhaust temperature between the first preset temperature and the second preset temperature.
Optionally, the control method of the electric compressor further includes:
And if the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
Optionally, the obtaining the exhaust temperature of the electric compressor includes:
And acquiring the exhaust temperature of the electric compressor through a temperature sensor arranged in a high-pressure pipeline of the whole vehicle end.
In a second aspect, the present invention provides a control system for an electric compressor, comprising a computer readable storage medium storing a computer program and a processor, the computer program, when read and run by the processor, implementing a control method for an electric compressor as described in any one of the above.
In a third aspect, the present invention provides an air conditioning system comprising the control system of the electric compressor described above.
In a fourth aspect, the present invention provides a vehicle comprising the air conditioning system described above.
The invention can be applied to vehicle types such as mixed motor, when the exhaust temperature of the electric compressor exceeds a first preset temperature, the relation between the exhaust temperature and a second preset temperature is continuously judged, if the exhaust temperature is smaller than the second preset temperature, the exhaust temperature of the electric compressor does not exceed the set highest temperature upper limit, therefore, the electric compressor is controlled to work for a preset period of time and then is stopped, for example, when the exhaust temperature of the electric compressor exceeds 125 ℃ but does not exceed 130 ℃, the electric compressor is controlled to work for 2 minutes and then is stopped, and the stopping time delay of the electric compressor is set to ensure that the electric compressor can continue to work in an affordable range under the condition that the normal work of the electric compressor is not influenced by the high temperature of a cabin, so that the electric compressor can be exerted to the maximum and the whole operation effect of the electric compressor is improved.
Drawings
Fig. 1 is a flow chart illustrating a control method of an electric compressor according to an embodiment of the present invention;
Fig. 2 is a flow chart of a control method of the motor-driven compressor according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1, the present invention provides a control method of an electric compressor, comprising:
The discharge temperature of the motor-driven compressor is obtained.
Specifically, the maximum exhaust temperature that the electric compressor can bear has a certain limit, so that the exhaust temperature of the electric compressor needs to be monitored in real time, so as to obtain the temperature inside the electric compressor, while the exhaust of the electric compressor is carried out through the whole vehicle high-pressure pipeline, so that the gas temperature of the high-pressure pipeline needs to be monitored and then reversely pushed into the electric compressor.
And when the exhaust temperature is greater than or equal to a first preset temperature, judging the relation between the exhaust temperature and a second preset temperature, wherein the second preset temperature is greater than the first preset temperature.
Specifically, because the temperature of the exhaust gas is more easily affected by the temperature of the cabin of the engine, the electric compressor is stopped when the temperature of the exhaust gas does not reach the corresponding temperature, therefore, when the temperature of the exhaust gas is greater than or equal to a first preset temperature, the relation between the temperature of the exhaust gas and a second preset temperature is needed to be judged, wherein the first preset temperature is the limit temperature which is set for the temperature of the exhaust gas of the electric compressor at present, and the second preset temperature is the limit temperature which can be born by the electric compressor in a short time, in the prior art, the electric compressor is usually controlled to stop immediately after the temperature of the exhaust gas exceeds the limit temperature, and in the application, the working time of the electric compressor in an bearable range is prolonged as far as possible through the relation between the temperature of the exhaust gas and the limit temperature.
And if the exhaust temperature is smaller than the second preset temperature, controlling the motor-driven compressor to work for a preset time period and then stopping the motor-driven compressor.
Specifically, when the exhaust temperature is less than the limit temperature of the electric compressor, the electric compressor can be operated at the temperature for a period of time without damaging the interior of the electric compressor, so that in order to maximize the capacity of the electric compressor, the electric compressor is controlled to be operated for a preset period of time and then stopped, so that the electric compressor gets rid of the influence of the excessive high engine room temperature on the exhaust temperature, but when the electric compressor is operated for the preset period of time, if the exhaust temperature of the electric compressor is less than the first preset temperature, the internal temperature of the electric compressor is returned to normal, the time limit of the preset period of time is canceled, and the electric compressor is restored to normal operation.
In the preferred embodiment of the invention, the method is applied to a hybrid vehicle type, wherein the first preset temperature can be 125 ℃, the second preset temperature can be 130 ℃, the delay working time can be 120s, when the exhaust temperature exceeds 125 ℃, the method judges whether the exhaust temperature exceeds 130 ℃, and if the exhaust temperature does not exceed 130 ℃, the motor-driven compressor is controlled to work for 120s and then stop.
The control method of the electric compressor of the invention can be applied to, for example, a hybrid vehicle type, when the exhaust temperature of the electric compressor exceeds a first preset temperature, the relation between the exhaust temperature and a second preset temperature is continuously judged, if the exhaust temperature is smaller than the second preset temperature, the exhaust temperature of the electric compressor does not exceed the set highest temperature upper limit, therefore, the electric compressor is controlled to stop after working for a preset period of time, for example, when the exhaust temperature of the electric compressor exceeds 125 ℃ but does not exceed 130 ℃, the electric compressor is controlled to stop after working for 2 minutes, the normal working of the electric compressor is ensured not to be influenced by the high temperature of a machine cabin, the electric compressor can be continuously operated within the bearable range, the electric compressor can be exerted to the maximum, and the whole operation effect is improved
Optionally, if the exhaust temperature exceeds a first preset temperature and is less than the second preset temperature, controlling the motor-driven compressor to stop after operating for a preset period of time includes:
If the exhaust temperature exceeds the first preset temperature and is smaller than the second preset temperature, controlling the electric compressor to work, and starting timing to obtain timing duration;
And when the timing time is longer than or equal to the preset time, controlling the electric compressor to stop.
Specifically, after the exhaust temperature of the electric compressor is obtained, the relationship between the exhaust temperature and the first preset temperature and the second preset temperature can be judged at the same time, if the exhaust temperature exceeds the first preset temperature and is smaller than the second preset temperature, timing is started, and the electric compressor is controlled by combining the relationship between the timing duration and the preset duration; with reference to fig. 2, whether the time duration is greater than or equal to a preset time duration is determined, if yes, it means that the electric compressor has been operated for the preset time duration, if in the time duration, the exhaust temperature is still between the first preset temperature and the second preset temperature, it means that the temperature of the electric compressor is still between the limiting temperature and the limiting temperature, and if the time duration reaches the preset time duration, it is controlled that the electric compressor is stopped; if not, continuing to acquire the exhaust temperature. If the exhaust temperature of the electric compressor is smaller than the first preset temperature, the internal temperature of the electric compressor returns to normal, the time limit of the preset time period is canceled, and the electric compressor is restored to normal operation.
In the preferred embodiment of the invention, the method is applied to a hybrid vehicle type, and judges whether the exhaust temperature exceeds 120 ℃ and is smaller than 130 ℃, if yes, the method indicates that the electric compressor is possibly influenced by the engine compartment temperature at the moment, and the exhaust temperature exceeds the limit temperature but does not exceed the limit temperature, at the moment, the electric compressor is controlled to continuously work and simultaneously count time, when the count time exceeds 2 minutes, the method indicates that the electric compressor itself is operated for a certain time in an overrun temperature state, at the moment, the purpose of prolonging the operation time of the electric compressor is achieved, and in order to avoid damage of the electric compressor, the electric compressor is controlled to stop.
According to the control method of the electric compressor, the electric compressor is controlled to work for a preset period of time and then is stopped, so that the running time of the electric compressor under a high-temperature working condition is prolonged, the electric compressor can continue to run within a bearable range, the electric compressor capacity is exerted to the maximum, the overall running effect of the electric compressor is improved, the electric compressor capacity is exerted to the maximum, and the overall running effect of the electric compressor is improved.
Optionally, the control method of the electric compressor further includes:
And when the timing duration is smaller than the preset duration and the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
Specifically, the time duration is less than the preset time duration, which represents that the electric compressor enters a stage of delayed shutdown, and is combined with the illustration of fig. 2, the exhaust temperature is still monitored at the stage, if the exhaust temperature suddenly rises above the second preset temperature at the stage, the electric compressor exceeds the limit temperature, and the electric compressor is damaged if the electric compressor continues to work at the moment, so that the electric compressor is immediately controlled to be stopped once the second preset temperature is exceeded, and the safety of the electric compressor is ensured.
According to the control method of the electric compressor, after the electric compressor enters the delayed working stage, the exhaust temperature is monitored in real time, so that even in the delayed stage, if the limit temperature is exceeded, the electric compressor is immediately controlled to stop, and the running time of the electric compressor is prolonged to the maximum extent on the premise that the safety of the electric compressor is ensured.
Optionally, the control method of the electric compressor further includes:
and determining the preset duration according to the exhaust temperature.
Specifically, the preset duration needs to be calculated according to specific data of the exhaust temperature in a first preset temperature and a second preset temperature range, if the exhaust temperature is relatively close to the first preset temperature in the range, the exhaust temperature is represented to slightly exceed the limit temperature, the delay working duration can be set to be longer at this time, if the exhaust temperature is relatively close to the second preset temperature in the range, the exhaust temperature of the electric compressor can be represented to quickly exceed the limit temperature, and the delay working duration is set to be shorter at this time, so that the exhaust temperature of the electric compressor is ensured not to exceed the second preset temperature all the time.
According to the control method of the electric compressor, the preset time length is determined according to the exhaust temperature, so that the safety of the electric compressor is ensured, and the running time of the electric compressor is prolonged to the maximum extent.
Optionally, the determining the preset duration according to the exhaust temperature includes:
when the exhaust temperature is the first preset temperature, setting the preset duration as a standard duration;
setting the preset duration to 0 when the exhaust temperature is the second preset temperature;
And when the exhaust temperature is greater than the first preset temperature and less than the second preset temperature, determining the preset duration according to linear interpolation of the exhaust temperature between the first preset temperature and the second preset temperature.
Specifically, when the exhaust temperature is a first preset temperature, the preset duration is set to be a standard duration, when the exhaust temperature is a second preset temperature, the preset duration is set to be 0, that is, the electric compressor is directly stopped without performing a delayed stopping operation, and the preset duration corresponding to the exhaust temperature between the first preset temperature and the second preset temperature is determined through linear interpolation from the first preset temperature to the second preset temperature, wherein the standard duration is determined empirically, and the duration range can be 90 to 150 seconds.
In a preferred embodiment of the present invention, the standard time period may be 2 minutes, so that the preset time period is 2 minutes when the exhaust temperature is 125 ℃, the preset time period is 0 minutes when the exhaust temperature is 130 ℃, and the preset time period of 125 ℃ to 130 ℃ is obtained by linear interpolation when the exhaust temperature is between 125 ℃ and 130 ℃, and the preset time period is in the range of 0-2 minutes.
According to the control method of the electric compressor, the specific duration of the preset duration is determined according to the exhaust temperature, so that the safety of the electric compressor is ensured, the running time of the electric compressor is prolonged to the maximum extent, and the overall running effect of the electric compressor is improved.
Optionally, the control method of the electric compressor further includes:
And if the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
Specifically, referring to fig. 2, it is determined whether the exhaust temperature is greater than or equal to a second preset temperature, if yes, it is determined that the electric compressor exceeds the limit temperature, and the electric compressor needs to be controlled to stop.
The control method of the electric compressor of the invention judges the exhaust temperature for a plurality of times, prolongs the running time of the electric compressor to the maximum extent and improves the whole running effect.
Optionally, the obtaining the exhaust temperature of the electric compressor includes:
And acquiring the exhaust temperature of the electric compressor through a temperature sensor arranged in a high-pressure pipeline of the whole vehicle end.
Specifically, the maximum exhaust temperature of the electric compressor is obtained by a temperature sensor on a high-pressure pipeline at the whole vehicle end, the exhaust temperature of the electric compressor is too high, and after the whole vehicle controller receives a sensor signal, the electric compressor can be automatically cut off, so that the internal mechanical structure and the whole system of the electric compressor are protected, and the electric compressor is prevented from being damaged.
According to the control method of the electric compressor, the exhaust temperature is monitored in real time through the temperature sensor, so that the internal temperature of the electric compressor is estimated, and the electric compressor is protected.
Another embodiment of the present invention provides a control system of an electric compressor, including a computer-readable storage medium storing a computer program and a processor, which when read and run by the processor, implements the control method of an electric compressor as above.
Another embodiment of the present invention provides an air conditioning system including the control system of the electric compressor.
Another embodiment of the present invention provides a vehicle including the air conditioning system described above.
Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.
Claims (6)
1. A control method of an electric compressor, comprising:
Acquiring the exhaust temperature of the electric compressor;
when the exhaust temperature is greater than or equal to a first preset temperature, judging the relation between the exhaust temperature and a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;
If the exhaust temperature is less than the second preset temperature, controlling the motor-driven compressor to work for a preset period of time and then stopping the motor-driven compressor, wherein the method specifically comprises the following steps: if the exhaust temperature is smaller than the second preset temperature, controlling the electric compressor to work and starting timing to obtain timing duration; when the timing time length is longer than or equal to the preset time length, controlling the electric compressor to stop;
The control method of the electric compressor further comprises the following steps: the preset duration is determined according to the exhaust temperature, and the method specifically comprises the following steps: when the exhaust temperature is the first preset temperature, setting the preset duration as a standard duration; setting the preset duration to 0 when the exhaust temperature is the second preset temperature; when the exhaust temperature is greater than the first preset temperature and less than the second preset temperature, determining the preset duration according to linear interpolation of the exhaust temperature between the first preset temperature and the second preset temperature;
the control method of the electric compressor further comprises the following steps: and when the timing duration is smaller than the preset duration and the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
2. The control method of an electric compressor according to claim 1, further comprising:
And if the exhaust temperature is greater than or equal to the second preset temperature, controlling the electric compressor to stop.
3. The control method of an electric compressor according to any one of claims 1 to 2, wherein the obtaining the discharge temperature of the electric compressor includes:
And acquiring the exhaust temperature of the electric compressor through a temperature sensor arranged in a high-pressure pipeline of the whole vehicle end.
4. A control system of an electric compressor, characterized by comprising a computer readable storage medium storing a computer program and a processor, which computer program, when read and run by the processor, implements the control method of an electric compressor according to any one of claims 1 to 3.
5. An air conditioning system comprising the control system of the electric compressor of claim 4.
6. A vehicle comprising the air conditioning system of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311313228.1A CN117052643B (en) | 2023-10-11 | 2023-10-11 | Control method and control system of electric compressor, air conditioning system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311313228.1A CN117052643B (en) | 2023-10-11 | 2023-10-11 | Control method and control system of electric compressor, air conditioning system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN117052643A CN117052643A (en) | 2023-11-14 |
| CN117052643B true CN117052643B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311313228.1A Active CN117052643B (en) | 2023-10-11 | 2023-10-11 | Control method and control system of electric compressor, air conditioning system and vehicle |
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| CN115289734A (en) * | 2022-08-16 | 2022-11-04 | 宁波奥克斯电气股份有限公司 | Compressor exhaust temperature control method and device, storage medium and air conditioner |
| WO2023015899A1 (en) * | 2021-08-13 | 2023-02-16 | 青岛海尔空调器有限总公司 | Method and apparatus for controlling frequency stability of air conditioner compressor, and electronic device |
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| CN106766444A (en) * | 2016-11-17 | 2017-05-31 | 广东美的暖通设备有限公司 | The liquid impact prevention control method and control device and air-conditioning system of air-conditioning system |
| CN111435030A (en) * | 2019-01-11 | 2020-07-21 | 日立江森自控空调有限公司 | Air conditioner control method and air conditioner system |
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| CN117052643A (en) | 2023-11-14 |
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