A vehicle air conditioner control method and a vehicle

Abstract

The present invention provides a vehicle air conditioner control method and a vehicle, belonging to the technical field of vehicle air conditioner control. When the vehicle air conditioner receives a start command, the time interval from the last end of operation of the compressor to the time when the air conditioner receives the start command this time is obtained as the compressor stop time, and the high-pressure pressure on the high-pressure side and the low-pressure pressure on the low-pressure side of the vehicle air conditioner are also obtained; when the compressor stop time is less than the set time, the high-pressure pressure is within the set high-pressure range, and the low-pressure pressure is within the set low-pressure range, a compressor start signal is output, and the vehicle controller controls the clutch of the compressor to engage according to the compressor start signal, so that the compressor starts to rotate and the air conditioner starts normally; when the compressor stop time is greater than the set time, the compressor start signal is not output, the clutch of the compressor is not engaged, and the compressor cannot rotate, so that the internal mechanical structure of the compressor will not be damaged, thereby prolonging the service life of the air conditioner.

Description

Technical Field

[0001] The present invention relates to a vehicle air - conditioner control method and a vehicle, belonging to the technical field of vehicle air - conditioner control. Background Art

[0002] At present, vehicles are usually equipped with air - conditioners to adjust the temperature inside the vehicle. Moreover, in different regions on the earth, due to different usage environments, the operating time of the air - conditioner is different. In tropical regions, vehicles usually turn on the air - conditioner for cooling in summer, and basically do not use the air - conditioner in winter. Therefore, the air - conditioner will not be used for a long time.

[0003] When the vehicle air - conditioner is running, the lubricating oil in the compressor lubricates and protects its moving friction parts. At the same time, the refrigerant in the air - conditioner is miscible with the lubricating oil and circulates in the entire air - conditioner system (including the compressor and other components). After a long time of non - use, the lubricating oil and refrigerant in the compressor will settle at the lower part of the compressor, resulting in stratification. The bottom of the compressor is refrigerant, and the upper part is lubricating oil. Therefore, when the air - conditioner is started for the first time after a long time of non - operation, as the refrigerant at the bottom of the compressor evaporates and is discharged from the compressor exhaust port, it will carry away a large amount of lubricating oil, resulting in an oil shortage inside the compressor. When the mechanical structure of the compressor runs at high speed in the state of lacking lubricating oil, it will be damaged due to the lack of oil - film protection at the friction parts and "seize", resulting in a reduction in the service life of the air - conditioner. Summary of the Invention

[0004] The purpose of the present invention is to provide a vehicle air - conditioner control method and a vehicle, which are used to solve the problems that the air - conditioner compressor of the vehicle is worn during startup and the service life of the air - conditioner is reduced due to long - term non - use of the vehicle air - conditioner.

[0005] In order to achieve the above purpose, the present invention provides a vehicle air - conditioner control method, including the following steps:

[0006] 1) When the vehicle air - conditioner receives a start command, obtain the compressor stop time of the air - conditioner compressor; the compressor stop time is the time interval from when the compressor of the vehicle air - conditioner stops running to when the air - conditioner starts again; also obtain the high - pressure of the vehicle air - conditioner on the high - pressure side and the low - pressure on the low - pressure side;

[0007] 2) When the compressor stop time is less than the set time, the high - pressure is within the set high - pressure range, and the low - pressure is within the set low - pressure range, output a compressor start signal to control the clutch of the compressor to engage;

[0008] When the compressor stop time is greater than the set time, do not output a compressor start signal.

[0009] When the vehicle air conditioner receives a start instruction, obtain the time interval from the last shutdown of the compressor to the moment when the air conditioner receives the start instruction as the compressor stop time. Also obtain the high-side pressure and low-side pressure of the vehicle air conditioner. When the compressor stop time is less than the set time, the high-side pressure is within the set high-pressure range, and the low-side pressure is within the set low-pressure range, output a compressor start signal. The vehicle controller controls the clutch of the compressor to engage according to the compressor start signal, causing the compressor to start rotating and enabling the air conditioner to start normally. When the compressor stop time is greater than the set time, do not output a compressor start signal, prevent the clutch of the compressor from engaging, and prevent the compressor from rotating, thus avoiding damage to the internal mechanical structure of the compressor and extending the service life of the air conditioner.

[0010] Further, in the above method, the set time is obtained according to the following method: When the compressor is operating normally, stop the compressor. Use the time when the compressor stops operating as the start time, and use the time when the oil film on the surface of the internal mechanical structure of the compressor is insufficient to meet the lubrication protection requirements as the end time. Take the difference between the end time and the start time as the set time.

[0011] Simulate the working state of the compressor during normal operation in the laboratory, then stop the operation of the compressor and start timing. Observe the displacement of the oil film on the surface of the internal structure of the compressor. When it is observed that the oil film cannot meet the lubrication requirements of the mechanical structure, stop timing. Take the time period during which the oil film on the surface of the internal structure of the compressor is displaced as the set time, which can ensure effective protection when the air conditioner starts.

[0012] Further, in the above method, in step 2), when the compressor stop time is greater than the set time, prompt the driver to maintain the air conditioner, which is used to prevent the driver from mistakenly thinking that the compressor is damaged when the air conditioner cannot start normally after receiving the start instruction.

[0013] When the compressor stop time is greater than the set time, output an alarm signal. The alarm signal is used to prompt the driver to maintain the air conditioner on the one hand, and to avoid the user's misunderstanding that the air conditioner compressor is damaged when there is no cooling effect after turning on the air conditioner for cooling on the other hand.

[0014] A vehicle provided by the present invention includes a controller and a memory. The controller is controllably connected to the clutch of the compressor. The controller executes the instructions stored in the memory to implement the above vehicle air conditioner control method.

[0015] The present invention also provides a vehicle air conditioner control method, including the following steps:

[0016] 1) When the vehicle air conditioner receives a start command, obtain the compressor stop time of the air conditioner compressor and the current engine speed of the vehicle; the compressor stop time is the time interval from when the compressor of the vehicle air conditioner stops running to when the air conditioner starts again; also obtain the high-pressure of the vehicle air conditioner on the high-pressure side and the low-pressure on the low-pressure side.

[0017] 2) When any one of the following judgment conditions is met, output a compressor start signal to control the clutch of the compressor to engage; otherwise, do not output a compressor start signal; the judgment conditions include:

[0018] Judgment condition 1: The compressor stop time is less than the set time, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range.

[0019] Judgment condition 2: The compressor stop time is greater than the set time, the current engine speed of the vehicle is less than the set speed, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range.

[0020] When the vehicle air conditioner receives a start command, obtain the time interval from the last end of operation of the compressor to when the air conditioner receives the start command as the compressor stop time, and also obtain the high-pressure of the vehicle air conditioner on the high-pressure side and the low-pressure on the low-pressure side; since the compressor is connected to the vehicle engine by a transmission structure, the current engine speed of the vehicle is also obtained; when the compressor stop time is less than the set time, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range, output a compressor start signal, and the vehicle controller controls the clutch of the compressor to engage according to the compressor start signal, so that the compressor starts to rotate and the air conditioner starts normally; when the compressor stop time is greater than the set time, the current engine speed of the vehicle is less than the set speed, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range, output a compressor start signal to control the clutch of the compressor to engage and make the air conditioner start normally; otherwise, do not output a compressor start signal, the clutch of the compressor will not engage, and the compressor cannot rotate, so the internal mechanical structure of the compressor will not be damaged, thus extending the service life of the air conditioner.

[0021] Further, in the above method, the set time is obtained according to the following method: When the compressor is operating normally, stop the compressor, use the time when the compressor stops running as the start time, use the time when the oil film on the surface of the internal mechanical structure of the compressor is insufficient to meet the lubrication and protection requirements as the end time, and use the difference between the end time and the start time as the set time.

[0022] Further, in the above method, in step 3), when the judgment result of the judgment condition corresponding to the control condition is false, the driver is also prompted to maintain the air conditioner, which is used to prevent the driver from mistakenly thinking that the compressor is damaged when the air conditioner cannot start normally after receiving the start command.

[0023] Further, in the above method, the state where the current rotational speed of the vehicle engine is less than the set rotational speed is the idling state of the vehicle.

[0024] The present invention also provides a vehicle, including a controller and a memory. The controller is controllably connected to the clutch of the compressor; the controller executes the instructions stored in the memory to implement the above-mentioned second vehicle air-conditioning control method. Description of the Drawings

[0025] Figure 1 is a schematic diagram of the control logic of the air-conditioning compressor in the prior art;

[0026] Figure 2 is a schematic diagram of the control logic of the air-conditioning compressor in the prior art;

[0027] Figure 3 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 1;

[0028] Figure 4 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 2;

[0029] Figure 5 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 5;

[0030] Figure 6 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 6;

[0031] Figure 7 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 7;

[0032] Figure 8 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 8;

[0033] Figure 9 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 9;

[0034] Figure 10 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 10;

[0035] Figure 11 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 11;

[0036] Figure 12 is a schematic diagram of the control logic of the vehicle air-conditioning control method in Embodiment 12. Detailed Embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] When the air conditioner of an existing vehicle is started, it is necessary to detect the air pressures at the inlet and outlet of the compressor. When it is detected that the low-pressure at the inlet of the compressor does not meet the set low-pressure range and the high-pressure at the outlet does not meet the set high-pressure range, the compressor is not allowed to operate. According to the serial order, there are two methods: first judge the high pressure and then judge the low pressure (such as Figure 1 ) and first judge the low pressure and then judge the high pressure (such as Figure 2 ). Only when the high-pressure is within the set high-pressure range and the low-pressure is within the set low-pressure range, the vehicle controller controls the clutch of the compressor to engage, and the engine drives the compressor to rotate through the transmission structure, so that the compressor can operate normally, boost the low-pressure gas from the inlet, make the gas reach the set high-pressure range, and input the high-pressure gas to the high-pressure pipeline through the exhaust port.

[0039] Method Embodiment 1:

[0040] A vehicle air conditioner control method in this embodiment compares the stop time of the compressor with a set time to determine whether the mechanical structure inside the compressor is in a normal lubrication state and whether the compressor can operate normally. As Figure 3 shown, the vehicle air conditioner control method includes the following steps:

[0041] 1) When air conditioning refrigeration is required, the driver starts the air conditioning refrigeration by pressing the air conditioner start button or other start methods in the cab, and the air conditioner controller receives the refrigeration instruction and obtains the compressor stop time. In this embodiment, the time interval between the last stop of the compressor and the current air conditioner receiving the refrigeration instruction is used as the compressor stop time.

[0042] 2) Compare the compressor stop time with the set time to determine whether the compressor can operate. The set time refers to the displacement time of the lubricating oil inside the compressor under specific conditions, which is obtained through experiments in the laboratory before leaving the factory. When the compressor is not working, the lubricating oil inside the compressor will displace and accumulate at the lower part of the compressor. At this time, there is no oil film or the oil film is not enough to effectively cover the friction surface on the upper mechanical structure surface of the compressor, which is not enough to protect the friction parts inside the compressor. Starting the compressor in this case will cause wear of the compressor and reduce the service life of the air conditioner.

[0043] The experiment to obtain the set time includes the following: When the compressor is operating normally and reaches a relatively stable state, stop the operation of the compressor. Take the time when the compressor stops running as the starting time of observation. Observe the flow of the lubricating oil on the surface of the mechanical structure inside the compressor. When it is observed that the lubricating oil or oil film on the surface of the mechanical structure reaches the critical point where it cannot meet the lubrication protection requirements, record the time at this moment as the end time of observation. Take the time interval from the starting time of observation to the end time of observation as the set time.

[0044] If the compressor stop time is greater than or equal to the set time, control the compressor not to start and inform the user through voice and text reminder methods. On the one hand, it can avoid the mechanical structure inside the compressor from running with no or less oil film, resulting in wear or mechanical failures, thus protecting the compressor. On the other hand, it can avoid the user from suspecting that the air conditioner is broken when there is no cooling effect after turning on the air conditioner for refrigeration, and remind the user to maintain the air conditioner.

[0045] If the compressor stop time is less than the set time, at this time, the mechanical structure inside the compressor still has an oil film covering the friction part, and continuous operation will not cause damage to the compressor, and the air conditioner can refrigerate normally.

[0046] 3) When the compressor stop time is less than the set time, obtain the low pressure on the inlet side of the compressor and the high pressure on the outlet side of the compressor. When the high pressure is within the set high pressure range, judge the low pressure on the inlet side of the compressor. When the low pressure meets the set low pressure range, start the compressor, and the air conditioner starts to cool down.

[0047] Method Embodiment 2:

[0048] As Figure 4 shown, the vehicle air conditioner control method of this embodiment includes the following steps:

[0049] 1) When the air conditioner receives a refrigeration instruction, obtain the compressor stop time.

[0050] 2) If the compressor stop time is greater than the set time, do not allow the compressor to start and issue voice and text alarm prompts; if the compressor stop time is less than the set time, then proceed to step 3).

[0051] 3) Obtain the low pressure on the inlet side of the compressor, and also obtain the high pressure on the outlet side of the compressor. When the low pressure is within the set low pressure range, judge the high pressure on the outlet side of the compressor. When the high pressure meets the set high pressure range, start the compressor, and the air conditioner starts to cool down.

[0052] Method Embodiment 3:

[0053] The vehicle air conditioner control method in this embodiment includes the following steps:

[0054] 1) When the air conditioner receives a refrigeration instruction, obtain the low-pressure pressure on the inlet side of the compressor and also obtain the high-pressure pressure on the outlet side of the compressor. When the high-pressure pressure is within the set high-pressure range, proceed to step 2).

[0055] 2) When the low-pressure pressure meets the set low-pressure range, proceed to step 3).

[0056] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start, and the user is informed through voice and text reminder methods; if the compressor stop time is less than the set time, start the compressor.

[0057] Method Embodiment 4:

[0058] The vehicle air conditioner control method in this embodiment includes the following steps:

[0059] 1) When the air conditioner receives a refrigeration instruction, obtain the low-pressure pressure on the inlet side of the compressor and also obtain the high-pressure pressure on the outlet side of the compressor. When the low-pressure pressure meets the set low-pressure range, proceed to step 2).

[0060] 2) When the high-pressure pressure is within the set high-pressure range, proceed to step 3).

[0061] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start, and the user is informed through voice and text reminder methods; if the compressor stop time is less than the set time, start the compressor.

[0062] Vehicle Embodiment 1:

[0063] The vehicle in this embodiment adopts the vehicle air conditioner control method described in any one of Method Embodiments 1-4, which has been clearly introduced in the corresponding method embodiments and will not be elaborated here.

[0064] Method Embodiment 5:

[0065] In a vehicle air conditioner control method of this embodiment, since the compressor operates in a way driven by the engine and the transmission ratio between the engine and the compressor has been set at the factory, on the basis of comparing the compressor stop time and the set time, the engine speed is further detected to determine whether the compressor can operate. As Figure 5 shown, the vehicle air conditioner control method includes the following steps:

[0066] 1) When air-conditioning refrigeration is required, the driver starts the air-conditioning refrigeration by pressing the air-conditioning start button in the cab or other starting methods. The air-conditioning controller receives the refrigeration instruction and obtains the compressor stop time. In this embodiment, the time interval between the last compressor stop and the current air-conditioning receiving the refrigeration instruction is used as the compressor stop time.

[0067] 2) Compare the compressor stop time with the set time to determine whether the compressor can operate. The set time refers to the displacement time of the lubricating oil inside the compressor under specific conditions. When the compressor is not working, the lubricating oil inside the compressor will displace and accumulate at the lower part of the compressor. At this time, there is no oil film or the oil film is not sufficient to effectively cover the friction surface on the mechanical structure surface at the upper part of the compressor, and it is not sufficient to protect the friction parts inside the compressor.

[0068] If the compressor stop time is greater than or equal to the set time, go to step 3).

[0069] If the compressor stop time is less than the set time, go to step 4). At this time, there is still an oil film covering the friction parts of the mechanical structure inside the compressor, and continuous operation will not cause damage to the compressor, and the air-conditioning can refrigerate normally.

[0070] 3) Obtain the engine speed and compare it with the set speed. If the engine speed is higher than the set speed, it is considered that the compressor operation at this time will cause damage or failure due to high-speed friction of the mechanical structure, which is not conducive to protecting the compressor. At this time, the user is informed through voice or text reminder. On the one hand, it can avoid the high-speed operation of the mechanical structure inside the compressor without or with less oil film, resulting in wear or mechanical failure, and protect the compressor; on the other hand, it can avoid the user's suspicion that the air-conditioning is broken after turning on the air-conditioning refrigeration without cooling effect, and remind the user to maintain the air-conditioning.

[0071] If the engine speed is lower than the set speed, go to step 4). At this time, the vehicle is in an idling state, such as the state when the vehicle engine starts without stepping on the accelerator, the flat driving state, the parking state, or other states where the engine speed is lower than the set speed. It is considered that when the compressor operates at this time, the wear generated at the friction parts of its internal mechanical structure is acceptable, and when working at a low speed, the lubricating oil will gradually cover the friction parts and restore the lubrication function.

[0072] 4) Obtain the low-pressure pressure on the inlet side of the compressor and also obtain the high-pressure pressure on the outlet side of the compressor. When the high-pressure pressure is within the set high-pressure range, judge the low-pressure pressure on the inlet side of the compressor. When the low-pressure pressure meets the set low-pressure range, start the compressor, and the air-conditioning starts to refrigerate and cool down.

[0073] Method Embodiment 6:

[0074] Such as Figure 6As shown in the figure, the vehicle air conditioner control method of this embodiment includes the following steps:

[0075] 1) When the air conditioner receives a refrigeration instruction, obtain the compressor stop time.

[0076] 2) If the compressor stop time is greater than the set time, proceed to step 3); if the compressor stop time is less than the set time, proceed to step 4).

[0077] 3) Obtain the engine speed and compare it with the set speed. If the engine speed is higher than the set speed, the compressor is not allowed to start; if the engine speed is lower than the set speed, proceed to step 4).

[0078] 4) Obtain the low-pressure on the inlet side of the compressor and also obtain the high-pressure on the outlet side of the compressor. When the low-pressure is within the set low-pressure range, judge the high-pressure on the outlet side of the compressor. When the high-pressure meets the set high-pressure range, start the compressor and the air conditioner starts to cool down.

[0079] Method Embodiment 7:

[0080] As Figure 7 shown in the figure, the vehicle air conditioner control method of this embodiment includes the following steps:

[0081] 1) When the air conditioner receives a refrigeration instruction, obtain the engine speed.

[0082] 2) If the engine speed is higher than the set speed, proceed to step 3); if the engine speed is lower than the set speed, proceed to step 4).

[0083] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start; if the compressor stop time is less than the set time, proceed to step 4).

[0084] 4) Obtain the low-pressure on the inlet side of the compressor and also obtain the high-pressure on the outlet side of the compressor. When the high and low pressures are within the set low-pressure range, judge the high-pressure on the outlet side of the compressor. When the high-pressure meets the set high-pressure range, start the compressor and the air conditioner starts to cool down.

[0085] Method Embodiment 8:

[0086] As Figure 8 shown in the figure, the control method of the air conditioner of this embodiment includes the following steps:

[0087] 1) When the air conditioner receives a refrigeration instruction, obtain the engine speed.

[0088] 2) If the engine speed is higher than the set speed, proceed to step 3); if the engine speed is lower than the set speed, proceed to step 4).

[0089] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start; if the compressor stop time is less than the set time, proceed to step 4).

[0090] 4) Obtain the low pressure on the inlet side of the compressor and also obtain the high pressure on the outlet side of the compressor. When the high pressure is within the set high pressure range, determine the low pressure on the inlet side of the compressor. When the low pressure meets the set low pressure range, start the compressor and the air conditioner starts to cool down.

[0091] Method Embodiment 9:

[0092] As Figure 9 shown, the vehicle air conditioner control method in this embodiment includes the following steps:

[0093] 1) When the air conditioner receives a cooling instruction, obtain the low pressure on the inlet side of the compressor and also obtain the high pressure on the outlet side of the compressor. When the high pressure is within the set high pressure range, proceed to step 2).

[0094] 2) When the low pressure meets the set low pressure range, proceed to step 3).

[0095] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, proceed to step 4); if the compressor stop time is less than the set time, start the compressor.

[0096] 4) Obtain the engine speed. If the engine speed is higher than the set speed, the compressor is not allowed to start, and the user is informed through voice or text reminder; if the engine speed is lower than the set speed, start the compressor.

[0097] Method Embodiment 10:

[0098] As Figure 10 shown, the vehicle air conditioner control method in this embodiment includes the following steps:

[0099] 1) When the air conditioner receives a cooling instruction, obtain the low pressure on the inlet side of the compressor and also obtain the high pressure on the outlet side of the compressor. When the low pressure meets the set low pressure range, proceed to step 2).

[0100] 2) When the high pressure is within the set high pressure range, proceed to step 3).

[0101] 3) Obtain the compressor stop time. If the compressor stop time is greater than the set time, proceed to step 4); if the compressor stop time is less than the set time, start the compressor.

[0102] 4) Obtain the engine speed. If the engine speed is higher than the set speed, the compressor is not allowed to start, and the user is informed through voice and text reminder methods; if the engine speed is lower than the set speed, the compressor is started.

[0103] Method Embodiment 11:

[0104] As Figure 11 shown, the vehicle air conditioner control method in this embodiment includes the following steps:

[0105] 1) When the air conditioner receives a refrigeration instruction, obtain the low pressure on the inlet side of the compressor and also obtain the high pressure on the outlet side of the compressor. If the high pressure is within the set high pressure range, proceed to step 2).

[0106] 2) If the low pressure meets the set low pressure range, proceed to step 3).

[0107] 3) Obtain the engine speed. If the engine speed is higher than the set speed, proceed to step 4); if the engine speed is lower than the set speed, start the compressor.

[0108] 4) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start, and the user is informed through voice and text reminder methods; if the compressor stop time is less than the set time, start the compressor.

[0109] Method Embodiment 12:

[0110] As Figure 12 shown, the vehicle air conditioner control method in this embodiment includes the following steps:

[0111] 1) When the air conditioner receives a refrigeration instruction, obtain the low pressure on the inlet side of the compressor and also obtain the high pressure on the outlet side of the compressor. If the low pressure meets the set low pressure range, proceed to step 2).

[0112] 2) If the high pressure is within the set high pressure range, proceed to step 3).

[0113] 3) Obtain the engine speed. If the engine speed is higher than the set speed, proceed to step 4); if the engine speed is lower than the set speed, start the compressor.

[0114] 4) Obtain the compressor stop time. If the compressor stop time is greater than the set time, the compressor is not allowed to start, and the user is informed through voice and text reminder methods; if the compressor stop time is less than the set time, start the compressor.

[0115] Vehicle Embodiment 2:

[0116] The vehicle in this embodiment adopts the vehicle air-conditioning control method described in any of the method embodiments 5-12, which has been clearly introduced in the corresponding method embodiments and will not be elaborated here.

Claims

1. A vehicle air conditioner control method, characterized in that, It includes the following steps: 1) When the vehicle air conditioner receives a start instruction, obtain the compressor stop time of the air conditioner compressor; the compressor stop time is the time interval from when the compressor of the vehicle air conditioner stops running to when the air conditioner starts again; also obtain the high-pressure of the vehicle air conditioner on the high-pressure side and the low-pressure on the low-pressure side; 2) When the compressor stop time is less than the set time, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range, output a compressor start signal and control the clutch of the compressor to engage; When the compressor stop time is greater than the set time, do not output a compressor start signal; The set time is obtained according to the following method: When the compressor is operating normally, stop the compressor. Use the time when the compressor stops running as the start time, and use the time when the oil film on the surface of the internal mechanical structure of the compressor is insufficient to meet the lubrication protection requirements as the end time. The difference between the end time and the start time is used as the set time.

2. The vehicle air-conditioning control method according to claim 1, characterized in that In step 2), when the compressor stop time is greater than the set time, prompt the driver to maintain the air conditioner to prevent the driver from mistakenly thinking that the compressor is damaged when the air conditioner cannot start normally after receiving the start instruction.

3. A vehicle, characterized in that, It includes a controller and a memory. The controller is controllably connected to the clutch of the compressor. The controller executes the instructions stored in the memory to implement the vehicle air conditioner control method described in any one of claims 1-2.

4. A vehicle air conditioner control method, characterized in that, It includes the following steps: 1) When the vehicle air conditioner receives a start instruction, obtain the compressor stop time of the air conditioner compressor and the current engine speed of the vehicle; the compressor stop time is the time interval from when the compressor of the vehicle air conditioner stops running to when the air conditioner starts again; also obtain the high-pressure of the vehicle air conditioner on the high-pressure side and the low-pressure on the low-pressure side; 2) When any one of the following judgment conditions is met, output a compressor start signal and control the clutch of the compressor to engage; otherwise, do not output a compressor start signal; the judgment conditions include: Judgment condition 1: The compressor stop time is less than the set time, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range; Judgment condition 2: The compressor stop time is greater than the set time, the current engine speed of the vehicle is less than the set speed, the high-pressure is within the set high-pressure range, and the low-pressure is within the set low-pressure range; The set time is obtained according to the following method: When the compressor is operating normally, stop the compressor. Use the time when the compressor stops running as the start time, and use the time when the oil film on the surface of the internal mechanical structure of the compressor is insufficient to meet the lubrication protection requirements as the end time. The difference between the end time and the start time is used as the set time.

5. The vehicle air conditioner control method according to claim 4, wherein, In step 3), when the judgment result of the judgment condition corresponding to the control condition is false, also prompt the driver to maintain the air conditioner to prevent the driver from mistakenly thinking that the compressor is damaged when the air conditioner cannot start normally after receiving the start instruction.

6. The vehicle air conditioner control method according to claim 4, characterized in that The state where the current engine speed of the vehicle is less than the set speed is the idle state of the vehicle.

7. A vehicle, characterized in that, It includes a controller and a memory. The controller is controllably connected to the clutch of the compressor; the controller executes the instructions stored in the memory to implement the vehicle air conditioner control method described in any one of claims 4-6.

Images