Automobile air conditioning control method, electronic device, and storage medium

Abstract

The application discloses a kind of automobile air conditioner control method, electronic equipment and storage medium.The automobile air conditioner control method includes: in response to the start request of air conditioner, control condenser cooling fan earlier than or equal to electric compressor start;In response to the stop request of air conditioner, control condenser cooling fan later than or equal to electric compressor stop.The present application is based on the noise masking effect of human hearing, using condenser cooling fan noise as the incremental source of air conditioning system working background noise, by staggering the start-stop time interval of cooling fan and electric compressor, let the cooling fan start in advance, delay closing, increase the background noise in the process of electric compressor start-stop, solve the abrupt feeling generated by noise mutation in the process of electric compressor start-stop.

Description

Technical Field

[0001] This invention relates to the field of automotive-related technologies, and in particular to an automotive air conditioning control method, electronic device, and storage medium. Background Technology

[0002] Air conditioning system noise, especially compressor noise, is one of the main sources of noise inside the vehicle. In gasoline vehicles, the presence of engine noise makes it difficult for customers to perceive the air conditioning noise. However, in EV mode, new energy vehicles lose this important background noise mask, and air conditioning system noise (mainly electric compressor noise) is gradually becoming the main source of noise inside the vehicle, which is particularly noticeable at idle speeds.

[0003] Compared to traditional compressors, electric compressors have the advantages of faster response and a wider speed adjustment range, enabling stepless speed regulation. However, electric compressors generally have a smaller displacement than traditional electric compressors, and under the same cooling demand, electric compressors operate at higher speeds and generate more noise.

[0004] Customers place great importance on the quietness and cooling performance of new energy vehicles. Quietness requires the electric compressor to run at the lowest possible speed, while cooling performance requires the electric compressor to run at the highest possible speed. To achieve both performance targets, the electric compressor cannot operate at its full capacity, resulting in a performance surplus.

[0005] To avoid drivers hearing noticeable electric compressor noise inside the vehicle, existing technology treats road noise, wind noise, and motor assembly noise as background noise when the vehicle is in motion. At this time, the electric compressor speed is increased, and the customer's sensitivity to the increased electric compressor noise decreases. Therefore, as the vehicle speed increases, the operating speed of the electric compressor can be increased simultaneously.

[0006] However, existing methods are not suitable for idling conditions because there is no increase in background noise such as road noise, wind noise, and motor assembly noise, and the overall background noise is low. There is no high-speed oncoming wind, the heat exchange efficiency is low, the cooling demand is higher, and a higher electric compressor operating speed is required. At this time, the risk of customers complaining about the noise of the electric compressor is higher. Summary of the Invention

[0007] Therefore, it is necessary to provide an automotive air conditioning control method, electronic device, and storage medium to address the technical problem of excessive noise from electric compressors in existing automobiles during idling.

[0008] This invention provides a method for controlling an automotive air conditioning system, comprising:

[0009] In response to the air conditioner's start-up request, the condenser cooling fan is controlled to start earlier than or equal to the start of the electric compressor;

[0010] In response to the air conditioner's stop request, the condenser cooling fan is controlled to stop later than or equal to the electric compressor's stop.

[0011] Furthermore:

[0012] The step of controlling the condenser cooling fan to start earlier than or equal to the start of the electric compressor in response to the air conditioner's start request specifically includes:

[0013] In response to the air conditioner's start request, the condenser cooling fan is controlled to start after a preset start interval, and then the electric compressor is controlled to start, or

[0014] In response to the start request of the air conditioner, the electric compressor speed required for the air conditioning system to work is calculated as the electric compressor requested speed. The condenser cooling fan speed required to mask the working noise of the electric compressor is determined as the cooling fan requested speed. The working noise is the noise generated when the electric compressor speed is the electric compressor requested speed. The condenser cooling fan is controlled to start. After the condenser cooling fan speed reaches the cooling fan requested speed, the electric compressor is controlled to start.

[0015] The step of controlling the condenser cooling fan to stop later than or equal to the electric compressor's stop in response to the air conditioner's stop request specifically includes: controlling the electric compressor to stop in response to the air conditioner's stop request, and controlling the condenser cooling fan to stop after the electric compressor stops operating, or

[0016] In response to the air conditioner's stop request, the electric compressor is controlled to stop, and after a preset stop time has elapsed since the electric compressor stopped, the condenser cooling fan is controlled to stop.

[0017] Furthermore, the step of controlling the condenser cooling fan to start after a preset start interval time in response to the air conditioner's start request, and then controlling the electric compressor to start, specifically includes:

[0018] In response to the air conditioner's start-up request, the required electric compressor speed for the air conditioning system to operate is calculated as the requested electric compressor speed.

[0019] Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, where the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor;

[0020] The time required for the electric compressor speed to adjust from 0 to the requested speed is calculated as the electric compressor start-up time, and the time required for the condenser cooling fan speed to adjust from 0 to the requested speed is calculated as the fan start-up time.

[0021] If the fan start time is less than or equal to the electric compressor start time, then the condenser cooling fan and the electric compressor are controlled to start simultaneously, and the condenser cooling fan speed is adjusted to the requested speed, and the electric compressor speed is adjusted to the requested speed.

[0022] If the fan start time is longer than the electric compressor start time, then the preset start interval is calculated as the difference between the fan start time and the electric compressor start time. The condenser cooling fan is then started, and the condenser cooling fan speed is adjusted to the requested speed. After the preset start interval of the condenser cooling fan start, the electric compressor is started, and the electric compressor speed is adjusted to the requested speed.

[0023] Furthermore, the step of responding to the air conditioner's stop request by controlling the electric compressor to stop, and then controlling the condenser cooling fan to stop after a preset stop time has elapsed, specifically includes:

[0024] In response to the air conditioner's stop request, the current electric compressor speed is obtained as the compressor operating speed, and the current condenser cooling fan speed is obtained as the cooling fan operating speed.

[0025] The time required for the electric compressor speed to adjust from its operating speed to 0 is calculated as the electric compressor stopping time. The time required for the condenser cooling fan speed to adjust from its operating speed to 0 is calculated as the fan stopping time.

[0026] If the fan stop time is less than or equal to the electric compressor stop time, then control the condenser cooling fan and the electric compressor to stop simultaneously;

[0027] If the fan stop time is greater than the electric compressor stop time, the preset stop time is calculated as the difference between the fan stop time and the electric compressor stop time. The electric compressor is then controlled to disconnect. After the preset stop time has elapsed, the cooling fan is controlled to disconnect.

[0028] Furthermore, it also includes:

[0029] In response to the request to adjust the air conditioning settings, the required speed of the electric compressor for the air conditioning system is calculated as the requested speed of the electric compressor.

[0030] The required condenser cooling fan speed to mask the operating noise of the electric compressor is determined as the requested speed of the cooling fan. The operating noise is the noise generated when the electric compressor operates at the requested speed. The cooling fan is then controlled to operate at the requested speed.

[0031] Furthermore:

[0032] The step of responding to the air conditioning setting parameter adjustment request by calculating the electric compressor speed required for the air conditioning system to operate as the requested electric compressor speed specifically includes:

[0033] The electric compressor speed under the current state is obtained as the electric compressor operating speed; the current vehicle heat load and the air conditioning setting parameters requested by the air conditioning state change are obtained.

[0034] Based on the current vehicle heat load and the requested air conditioning temperature setting information, the electric compressor speed required for the air conditioning system to operate is calculated as the requested electric compressor speed.

[0035] The determination of the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested cooling fan speed, wherein the operating noise is the noise generated when the electric compressor operates at the requested speed, and controlling the cooling fan to operate at the requested speed specifically includes:

[0036] Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, where the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor;

[0037] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval time, the electric compressor is controlled to adjust its speed to the requested speed.

[0038] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

[0039] Furthermore, determining the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested cooling fan speed, specifically includes:

[0040] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0041] Determine the operating noise of the second electric compressor corresponding to the operating speed of the electric compressor;

[0042] If the difference between the operating noise of the first electric compressor and the operating noise of the second electric compressor is greater than or equal to the preset minimum noise change sensitivity trigger value, then the condenser cooling fan speed required to mask the operating noise of the first electric compressor is calculated and used as the requested speed of the cooling fan; otherwise, the electric compressor speed is adjusted to the requested speed, the cooling fan speed is kept constant, and the process ends.

[0043] Furthermore:

[0044] The acquisition of air conditioning parameters specifically includes: acquiring the current cooling fan speed as the cooling fan operating speed;

[0045] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the electric compressor is controlled to adjust its speed to the requested speed. Specifically, this includes:

[0046] The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time.

[0047] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and adjust the speed of the electric compressor to the requested speed of the electric compressor.

[0048] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the preset adjustment interval is calculated as the difference between the fan adjustment time and the electric compressor adjustment time. The condenser cooling fan is then controlled to adjust its speed to the requested speed. After the preset adjustment interval is reached, the electric compressor is controlled to adjust its speed to the requested speed.

[0049] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed. Specifically, this includes:

[0050] The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time.

[0051] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the electric compressor is controlled to adjust its speed to the requested speed. After the electric compressor is controlled to adjust its speed for a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

[0052] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and the speed of the electric compressor is adjusted to the requested speed of the electric compressor.

[0053] Furthermore, the condenser cooling fan speed required to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, and the operating noise being the noise generated when the electric compressor speed is the requested speed, specifically includes:

[0054] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0055] Calculate the background noise required to mask the operating noise of the first electric compressor;

[0056] Determine the required fan speed to meet the background noise level.

[0057] Furthermore, the calculation of the background noise required to mask the operating noise of the first electric compressor specifically includes:

[0058] The background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

[0059] Furthermore, determining the required fan speed to satisfy the background noise specifically includes:

[0060] Determine the requested speed of the first cooling fan corresponding to the background noise;

[0061] Obtain the vehicle's current cooling demand information and determine the required rotational speed of the second cooling fan to meet the current vehicle cooling demand;

[0062] The maximum value of the first cooling fan's requested speed and the second cooling fan's requested speed is selected as the cooling fan's requested speed to satisfy the background noise.

[0063] This invention provides an electronic device, comprising:

[0064] At least one processor; and,

[0065] A memory communicatively connected to at least one of the processors; wherein,

[0066] The memory stores instructions that can be executed by at least one of the processors to enable at least one of the processors to perform the automotive air conditioning control method as described above.

[0067] The present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the automotive air conditioning control method described above.

[0068] This invention is based on the noise masking effect of human hearing. It utilizes the noise of the condenser cooling fan as an incremental source of background noise in the air conditioning system. By staggering the start-stop time intervals of the cooling fan and the electric compressor, the cooling fan is started in advance and shut down later, increasing the background noise during the start-stop process of the electric compressor and solving the abruptness caused by the sudden change in noise during the start-stop process of the electric compressor. By keeping the operating noise of the electric compressor and the operating noise of the cooling fan within a preset difference range, the operating speed range of the electric compressor is significantly increased with a small increase in cost. This provides a new control strategy for balancing the cooling capacity and quietness of the air conditioning system in electric vehicles. Attached Figure Description

[0069] Figure 1 This is a flowchart illustrating the operation of an automotive air conditioning control method according to an embodiment of the present invention.

[0070] Figure 2 This is a flowchart illustrating the operation of an automotive air conditioning control method according to another embodiment of the present invention.

[0071] Figure 3A flowchart illustrating the air conditioning control method when the air conditioner is turned on, which is the preferred embodiment of the present invention.

[0072] Figure 4 This is a flowchart illustrating the operation of an automotive air conditioning control method according to another embodiment of the present invention;

[0073] Figure 5 A flowchart illustrating the air conditioning control method for adjusting air conditioning parameter settings during air conditioning operation, which is a preferred embodiment of the present invention.

[0074] Figure 6 A flowchart illustrating the air conditioning control method when the air conditioner is turned off, which is a preferred embodiment of the present invention.

[0075] Figure 7 This is the characteristic curve of the rate of increase of the electric compressor speed;

[0076] Figure 8 The characteristic curve of the rate of decrease in the rotational speed of the electric compressor;

[0077] Figure 9 The speed-noise characteristic curve of the electric compressor;

[0078] Figure 10 The characteristic curve of the rate of increase of cooling fan speed;

[0079] Figure 11 This is the characteristic curve of the rate of decrease in cooling fan speed;

[0080] Figure 12 The cooling fan speed-noise characteristic curve;

[0081] Figure 13 This is a characteristic curve of cooling fan speed versus terminal voltage.

[0082] Figure 14 This is a schematic diagram of the hardware structure of an electronic device according to the present invention. Detailed Implementation

[0083] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0084] like Figure 1 The diagram shown is a flowchart of a car air conditioning control method according to an embodiment of the present invention, including:

[0085] Step S101: In response to the air conditioner's start request, control the condenser cooling fan to start earlier than or equal to the start of the electric compressor;

[0086] In step S102, in response to the air conditioner's stop request, the condenser cooling fan is controlled to stop later than or equal to the electric compressor's stop.

[0087] Specifically, the present invention can be applied to the electronic control unit (ECU) of a vehicle.

[0088] Among them, automobiles include, but are not limited to, electric vehicles, hybrid vehicles, or range-extended vehicles that use automobile air conditioning with electric compressors.

[0089] When the user turns on the air conditioner, step S101 is triggered, controlling the condenser cooling fan to start earlier than or equal to the start of the electric compressor. When the user turns off the air conditioner, step S102 is triggered, controlling the condenser cooling fan to stop later than or equal to the stop of the electric compressor.

[0090] Therefore, when the air conditioner is turned on, the condenser cooling fan starts before the electric compressor begins, and the noise generated by the condenser cooling fan masks the noise of the electric compressor that starts subsequently. When the air conditioner is turned off, the electric compressor is turned off first. Therefore, throughout the entire process of the electric compressor generating noise, the condenser cooling fan continues to work, continuously generating noise that masks the noise of the electric compressor.

[0091] Based on the noise masking effect, background noise increases the overall noise level that is acceptable to customers. Therefore, this invention uses the operating noise of the condenser cooling fan as the incremental object of background noise when the electric compressor is working. By clarifying the quantitative relationship between the noise of the cooling fan and the noise of the electric compressor at different operating speeds, the cooling fan and the electric compressor are controlled to operate according to a preset operating speed logic, thus balancing the dual requirements of cooling performance and quietness.

[0092] This invention is based on the noise masking effect of human hearing. It utilizes the noise of the condenser cooling fan as an incremental source of background noise in the air conditioning system. By staggering the start-stop time intervals of the cooling fan and the electric compressor, the cooling fan starts earlier and shuts down later, increasing the background noise during the start-stop process of the electric compressor and thus resolving the abruptness caused by the sudden change in noise during the start-stop process of the electric compressor.

[0093] like Figure 2 The diagram shown is a flowchart of a car air conditioning control method according to another embodiment of the present invention, including:

[0094] Step S201: In response to the start request of the air conditioner, calculate the electric compressor speed required for the air conditioning system to work as the electric compressor requested speed;

[0095] Step S202: Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan; the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor.

[0096] Step S203: Calculate the time required for the electric compressor speed to be adjusted from 0 to the requested speed as the electric compressor start-up time, and calculate the time required for the condenser cooling fan speed to be adjusted from 0 to the requested speed as the fan start-up time.

[0097] Step S204: If the fan start time is less than or equal to the electric compressor start time, then control the condenser cooling fan and the electric compressor to start simultaneously, and adjust the condenser cooling fan speed to the requested speed of the cooling fan, and adjust the electric compressor speed to the requested speed of the electric compressor.

[0098] Step S205: If the fan start time is greater than the electric compressor start time, calculate the preset start interval as the difference between the fan start time and the electric compressor start time, control the condenser cooling fan to start, and adjust the condenser cooling fan speed to the requested speed. After the preset start interval of the condenser cooling fan start, control the electric compressor to start, and adjust the electric compressor speed to the requested speed.

[0099] In one embodiment, the step of determining the condenser cooling fan speed required to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, and the operating noise being the noise generated when the electric compressor speed is the requested speed of the electric compressor, specifically includes:

[0100] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0101] Calculate the background noise required to mask the operating noise of the first electric compressor;

[0102] Determine the required fan speed to meet the background noise level.

[0103] In one embodiment, the calculation of the background noise required to mask the operating noise of the first electric compressor specifically includes:

[0104] The background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

[0105] In one embodiment, determining the requested fan speed to satisfy the background noise specifically includes:

[0106] Determine the requested speed of the first cooling fan corresponding to the background noise;

[0107] Obtain the vehicle's current cooling demand information and determine the required rotational speed of the second cooling fan to meet the current vehicle cooling demand;

[0108] The maximum value of the first cooling fan's requested speed and the second cooling fan's requested speed is selected as the cooling fan's requested speed to satisfy the background noise.

[0109] Specifically, this embodiment describes the control strategy when the air conditioner is turned on.

[0110] When a user turns on the air conditioner, for example, by pressing a button on the vehicle's infotainment system, step S201 is triggered to obtain the current vehicle heat load and air conditioner temperature setting information. Based on the current vehicle heat load and air conditioner temperature setting information, the minimum speed of the electric compressor required for the air conditioning system to operate is calculated as the requested speed of the electric compressor.

[0111] Then, step S202 is executed to determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, which is then used as the requested speed of the cooling fan.

[0112] Specifically, firstly, the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor is determined.

[0113] like Figure 9 The image shows an example of an electric compressor speed-noise characteristic curve. After obtaining the requested speed of the electric compressor, the noise corresponding to the requested speed can be determined from the electric compressor speed-noise characteristic curve as the operating noise of the first electric compressor.

[0114] Then, the background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

[0115] The management target value ΔT for the operating noise of the electric compressor is defined as the maximum difference in in-vehicle noise between the operating state and the stopped state of the electric compressor. Considering increasing the noise of the cooling fan as the background noise increment of the electric compressor operating noise, the minimum value of the cooling fan operating noise at the A / C start-up time is Nc-ΔT.

[0116] Then through, as Figure 12 The preset cooling fan speed-noise characteristic curve is shown. The first cooling fan's requested speed is calculated when the noise value is Nc-ΔT.

[0117] Then, the vehicle's current cooling demand information is obtained, the second cooling fan request speed required to meet the current vehicle cooling demand is determined, and the first cooling fan request speed and the second cooling fan request speed are taken as the maximum value of the first cooling fan request speed and the second cooling fan request speed.

[0118] Then, steps S203 to S205 are executed. First, the cooling fan is started, generating background noise. Under this background noise, the electric compressor is then started, so that the noise generated by the electric compressor's start-up is masked by the background noise generated by the cooling fan. This resolves the abruptness caused by sudden noise changes during the start-up and shutdown of the electric compressor.

[0119] Specifically:

[0120] Execute step S203, calculate the time required for the electric compressor speed to be adjusted from 0 to the requested speed as the electric compressor start-up time, and calculate the time required for the condenser cooling fan speed to be adjusted from 0 to the requested speed as the fan start-up time;

[0121] If the fan start time is less than or equal to the electric compressor start time, then step S204 is executed, controlling the condenser cooling fan and the electric compressor to start simultaneously, and adjusting the condenser cooling fan speed to the requested speed and the electric compressor speed to the requested speed.

[0122] If the fan start time is greater than the electric compressor start time, then step S205 is executed to calculate the preset start interval time as the difference between the fan start time and the electric compressor start time.

[0123] The cooling fan is controlled to start and adjusted to the requested speed. After a preset start interval time has elapsed since the cooling fan started, the electric compressor is controlled to start and adjusted to the requested speed.

[0124] Specifically, it can be based on Figure 7 and Figure 8 The electric compressor speed adjustment rate characteristic shown is used to calculate the time required for the electric compressor to adjust from 0 to the requested speed as the electric compressor start-up time. Figure 10 and Figure 11 The cooling fan speed adjustment rate characteristic shown is used to calculate the time required for the cooling fan to adjust from 0 to the requested speed as the fan start time, and then calculate the preset start interval time as the difference between the fan start time and the electric compressor start time.

[0125] Finally, the cooling fan is started first, and after a preset start interval, the electric compressor is started. After the cooling fan starts, its speed is adjusted to the requested speed. After the electric compressor starts, its speed is adjusted to the requested speed.

[0126] Since the start-up interval is the difference between the fan start-up time and the electric compressor start-up time, controlling the electric compressor to start after the cooling fan starts at the preset start-up interval will ensure that the time when the cooling fan speed reaches the cooling fan's requested speed is the same as the time when the electric compressor reaches the electric compressor's requested speed.

[0127] In one embodiment, in response to the start request of the air conditioner, the electric compressor speed required for the air conditioning system to operate is calculated as the electric compressor requested speed, and the condenser cooling fan speed required to mask the operating noise of the electric compressor is determined as the cooling fan requested speed. The operating noise is the noise generated when the electric compressor speed is the electric compressor requested speed. The condenser cooling fan is controlled to start, and the electric compressor is controlled to start after the condenser cooling fan speed reaches the cooling fan requested speed.

[0128] Specifically, the calculation method for the requested speed of the cooling fan is the same as described above. When the speed of the condenser cooling fan reaches the requested speed, the electric compressor is controlled to start and the speed of the electric compressor is adjusted to the requested speed.

[0129] like Figure 3 The diagram shown is a flowchart of the air conditioning control method when the air conditioner is turned on, according to the preferred embodiment of the present invention, including:

[0130] Step S301: Identify the A / C ON working request signal, obtain the current vehicle heat load and air conditioning temperature setting information, and calculate the minimum electric compressor speed Vc_min required for the air conditioning system to work;

[0131] Step S302: Calculate the operating noise Nc_min of the electric compressor at a speed of Vc_min using the preset electric compressor speed-noise characteristic curve;

[0132] Step S303: Calculate the required operating speed Sfan_1 of the cooling fan when the noise value is Nc_min-△T using the preset cooling fan speed-noise characteristic curve, where △T is the management target value of the electric compressor operating noise.

[0133] Step S304: By obtaining the vehicle's current heat dissipation demand information, determine the required operating speed Sfan_2 of the cooling fan to meet the current vehicle heat dissipation demand, and take the larger value of Sfan_1 and Sfan_2 as the current cooling fan control speed Sfan_target.

[0134] Step S305: Based on the speed adjustment rate characteristics of the electric compressor and the speed adjustment rate characteristics of the cooling fan, calculate the time Tc required for the electric compressor speed to increase from 0 to Vc_min, and calculate the time Tfan required for the cooling fan speed to increase from 0 to Sfan_target.

[0135] Step S306: If Tc≥Tfan, then control the cooling fan and compressor to start synchronously, control the cooling fan speed to increase to Sfan_target, and control the compressor speed to increase to Vc_min respectively;

[0136] In step S307, if Tc < Tfan, the cooling fan is controlled to start first and speed up to Sfan_target. After an interval of ≥ (Tfan-Tc), the compressor is started again and its speed is controlled to increase to Vc_min.

[0137] This embodiment is based on the noise masking effect of human hearing. It uses the noise of the condenser cooling fan as an incremental source of background noise in the air conditioning system. By staggering the start-stop time intervals of the cooling fan and the electric compressor, the cooling fan is started in advance, increasing the background noise during the start-stop process of the electric compressor and solving the abruptness caused by the sudden noise change during the start-stop process of the electric compressor.

[0138] like Figure 4 The diagram shown is a flowchart of a car air conditioning control method according to another embodiment of the present invention, including:

[0139] Step S401: In response to the air conditioning setting parameter adjustment request, calculate the electric compressor speed required for the air conditioning system to operate as the requested electric compressor speed;

[0140] Step S402: Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, which is the requested speed of the cooling fan. The operating noise is the noise generated when the electric compressor operates at the requested speed. Control the cooling fan to operate at the requested speed.

[0141] In one embodiment, the step of responding to an air conditioning setting parameter adjustment request by calculating the electric compressor speed required for the air conditioning system to operate as the requested electric compressor speed specifically includes:

[0142] The current electric compressor speed is obtained as the electric compressor operating speed, and the current vehicle heat load and the air conditioning setting parameters requested by the air conditioning status change are obtained;

[0143] Based on the current vehicle heat load and the requested air conditioning temperature setting information, the required electric compressor speed for the air conditioning system is calculated as the requested electric compressor speed.

[0144] The determination of the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested cooling fan speed, wherein the operating noise is the noise generated when the electric compressor operates at the requested speed, and controlling the cooling fan to operate at the requested speed specifically includes:

[0145] Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, where the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor;

[0146] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval time, the electric compressor is controlled to adjust its speed to the requested speed.

[0147] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

[0148] In one embodiment, determining the required condenser fan speed to mask the operating noise of the electric compressor, as the requested fan speed, specifically includes:

[0149] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0150] Determine the operating noise of the second electric compressor corresponding to the operating speed of the electric compressor;

[0151] If the difference between the operating noise of the first electric compressor and the operating noise of the second electric compressor is greater than or equal to the preset minimum noise change sensitivity trigger value, then the condenser cooling fan speed required to mask the operating noise of the first electric compressor is calculated and used as the requested speed of the cooling fan; otherwise, the electric compressor speed is adjusted to the requested speed, the cooling fan speed is kept constant, and the process ends.

[0152] In one embodiment:

[0153] The acquisition of air conditioning parameters specifically includes: acquiring the current cooling fan speed as the cooling fan operating speed;

[0154] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the electric compressor is controlled to adjust its speed to the requested speed. Specifically, this includes:

[0155] The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time.

[0156] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and adjust the speed of the electric compressor to the requested speed of the electric compressor.

[0157] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the preset adjustment interval is calculated as the difference between the fan adjustment time and the electric compressor adjustment time. The condenser cooling fan is then controlled to adjust its speed to the requested speed. After the preset adjustment interval is reached, the electric compressor is controlled to adjust its speed to the requested speed.

[0158] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed. Specifically, this includes:

[0159] The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time.

[0160] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the electric compressor is controlled to adjust its speed to the requested speed. After the electric compressor is controlled to adjust its speed for a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

[0161] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and the speed of the electric compressor is adjusted to the requested speed of the electric compressor.

[0162] In one embodiment, the step of determining the condenser cooling fan speed required to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, and the operating noise being the noise generated when the electric compressor speed is the requested speed of the electric compressor, specifically includes:

[0163] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0164] Calculate the background noise required to mask the operating noise of the first electric compressor;

[0165] Determine the required fan speed to meet the background noise level.

[0166] In one embodiment, the calculation of the background noise required to mask the operating noise of the first electric compressor specifically includes:

[0167] The background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

[0168] In one embodiment, determining the requested fan speed to satisfy the background noise specifically includes:

[0169] Determine the requested speed of the first cooling fan corresponding to the background noise;

[0170] Obtain the vehicle's current cooling demand information and determine the required rotational speed of the second cooling fan to meet the current vehicle cooling demand;

[0171] The maximum value of the first cooling fan's requested speed and the second cooling fan's requested speed is selected as the cooling fan's requested speed to satisfy the background noise.

[0172] Specifically, this embodiment describes a control strategy for adjusting air conditioning parameter settings during air conditioning operation.

[0173] When a user adjusts the air conditioning parameters, such as raising or lowering the air conditioning temperature via the vehicle's buttons, step S401 is triggered to calculate the electric compressor speed required for the air conditioning system to operate as the electric compressor request speed.

[0174] Specifically, the electric compressor speed under the current state is obtained as the electric compressor operating speed; the current vehicle heat load and the air conditioning setting parameters requested by the air conditioning state change are obtained; the requested air conditioning temperature setting information is adjusted according to the current vehicle heat load and the air conditioning setting parameters; and the electric compressor speed required for the air conditioning system to work is calculated as the electric compressor requested speed.

[0175] Preferably, when the air conditioning panel settings are adjusted, the vehicle heat load and the adjusted air conditioning parameter settings are obtained, and the minimum speed of the electric compressor required to meet the current air conditioning parameter settings is calculated as the requested speed of the electric compressor.

[0176] The electric compressor speed can be directly retrieved through the engine control module (ECM).

[0177] In one embodiment, obtaining the air conditioning parameters further includes: obtaining the current cooling fan speed as the cooling fan operating speed.

[0178] Specifically, at the vehicle level, the cooling fan speed is adjusted by controlling the voltage at the cooling fan control terminal. There is a relationship between the cooling fan speed and the cooling fan control terminal voltage value, such as... Figure 13 The corresponding relationship is shown. Therefore, the cooling fan speed can be determined by retrieving the cooling fan control terminal voltage value from the ECM, and then calculating the corresponding cooling fan speed under the current state as the cooling fan operating speed.

[0179] Then, step S402 is executed to determine the condenser cooling fan speed required to mask the operating noise of the electric compressor, which is taken as the requested speed of the cooling fan. The operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor, and the cooling fan is controlled to operate at the requested speed of the cooling fan.

[0180] like Figure 9 The figure shows an example of an electric compressor speed-noise characteristic curve. In step S401, after obtaining the requested speed of the electric compressor, the noise corresponding to the requested speed can be determined from the electric compressor speed-noise characteristic curve as the first electric compressor operating noise.

[0181] Then, the background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

[0182] The management target value ΔT for the electric compressor operating noise is defined as the maximum difference in in-vehicle noise between the electric compressor operating state and the electric compressor stopped state. Considering increasing the cooling fan noise as the background noise increment of the electric compressor operating noise, the minimum value of the cooling fan operating noise at the A / C start-up time is Nc-ΔT. Then, step S405 is executed, through... Figure 12 The preset cooling fan speed-noise characteristic curve is shown. The first cooling fan's requested speed is calculated when the noise value is Nc-ΔT.

[0183] Considering the occupants' sensitivity to noise changes, a minimum noise change sensitivity trigger value ΔS is set.

[0184] In one embodiment, determining the required condenser fan speed to mask the operating noise of the electric compressor, as the requested fan speed, specifically includes:

[0185] Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor;

[0186] Determine the operating noise of the second electric compressor corresponding to the operating speed of the electric compressor;

[0187] If the difference between the operating noise of the first electric compressor and the operating noise of the second electric compressor is greater than or equal to the preset minimum noise change sensitivity trigger value ΔS, then the condenser cooling fan speed required to mask the operating noise of the first electric compressor is calculated and used as the requested speed of the cooling fan. Otherwise, the electric compressor is controlled to adjust its speed to the requested speed, the cooling fan is controlled to keep its speed constant, and the process ends.

[0188] Specifically, such as Figure 9 The diagram shows an example of an electric compressor speed-noise characteristic curve. The noise corresponding to the operating speed of the electric compressor can be determined from this curve as the operating noise of the second electric compressor. Then, the difference between the operating noise of the first and second electric compressors is compared. If the difference is greater than or equal to a preset minimum noise change sensitivity trigger value ΔS, the background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, and subsequent steps are performed to calculate the requested speed of the cooling fan and adjust the condenser cooling fan speed. If the difference is less than the preset minimum noise change sensitivity trigger value ΔS, the electric compressor speed is adjusted to the requested speed, the cooling fan speed is kept constant, and all subsequent steps end.

[0189] After obtaining the vehicle's current cooling demand information and determining the second cooling fan request speed required to meet the current vehicle cooling demand, the maximum value of the first cooling fan request speed and the second cooling fan request speed is selected as the cooling fan request speed that meets the background noise requirement.

[0190] Finally, based on the comparison between the requested speed of the electric compressor and the operating speed of the electric compressor, the corresponding steps are executed.

[0191] First, calculate the time required for the electric compressor speed to adjust from its operating speed to its requested speed as the electric compressor adjustment time. Then, calculate the time required for the cooling fan speed to adjust from its operating speed to its requested speed as the fan adjustment time.

[0192] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and adjust the speed of the electric compressor to the requested speed of the electric compressor.

[0193] If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the preset adjustment interval is calculated as the difference between the fan adjustment time and the electric compressor adjustment time. The condenser cooling fan is then controlled to adjust its speed to the requested speed. After the preset adjustment interval is reached, the electric compressor is controlled to adjust its speed to the requested speed.

[0194] from Figure 9 It can be seen that the electric compressor speed and the electric compressor noise change in the same direction; therefore, increasing the electric compressor speed will cause the electric compressor noise to increase. And from... Figure 12 It can be seen that the cooling fan speed and the cooling fan noise change in the same direction. Therefore, the cooling fan speed is increased first to increase the background noise generated by the cooling fan. After adjusting the interval time, the electric compressor speed is increased so that the electric compressor noise increased by the speed increase is masked by the background noise generated by the cooling fan.

[0195] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the electric compressor is controlled to adjust its speed to the requested speed. After the electric compressor is controlled to adjust its speed for a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

[0196] If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and the speed of the electric compressor is adjusted to the requested speed of the electric compressor.

[0197] When the electric compressor slows down, the background noise generated by the cooling fan is maintained initially to mask the noise of the electric compressor. After the electric compressor slows down for a certain adjustment interval, the speed of the cooling fan is reduced again, thus ensuring that the background noise generated by the cooling fan can continuously mask the noise of the electric compressor.

[0198] Specifically, it can be based on Figure 7 and Figure 8 The electric compressor speed adjustment rate characteristic shown is used to calculate the time required for the electric compressor to adjust from its operating speed to the requested speed as the adjustment time. Figure 10 and Figure 11 The cooling fan speed adjustment rate characteristic shown is used to calculate the time required for the cooling fan to adjust from its operating speed to its requested speed as the fan start time. Then, the preset adjustment interval time is calculated as the difference between the fan adjustment time and the electric compressor adjustment time.

[0199] In this embodiment, the cooling fan is used as the source of background noise. The speed of the cooling fan is adjusted before the noise of the electric compressor increases (when the fan speed is at its slowest) and after the noise of the electric compressor decreases (when the fan speed is at its fastest).

[0200] like Figure 5 The diagram shows a flowchart of the air conditioning control method for adjusting air conditioning parameter settings during air conditioning operation, according to the preferred embodiment of the present invention, including:

[0201] Step S501: Obtain the current operating speed of the electric compressor Vc(t0) and the operating speed of the cooling fan Sfan(t0). When the air conditioning panel settings are adjusted, obtain the vehicle heat load and the adjusted air conditioning parameter settings information, and calculate the minimum electric compressor speed Vc(t1) required to meet the current air conditioning parameter settings.

[0202] Step S502: Calculate the operating noise Nc(t0) and Nc(t1) of the electric compressor at speeds of Vc(t0) and Vc(t1) using the preset electric compressor speed-noise characteristic curve. Considering the occupants' sensitivity to noise changes, set the minimum noise change sensitivity trigger value ΔS.

[0203] Step S503: If the interpolation between Nc(t1) and Nc(t0) is ≥ ΔS, then proceed to step S504; otherwise, proceed to step S509.

[0204] Step S504: Calculate the required operating speed Sfan(t1) of the cooling fan when the noise value is Nc(t1)-ΔT using the preset cooling fan speed-noise characteristic curve, where ΔT is the management target value of the electric compressor operating noise.

[0205] Step S505: Obtain the vehicle heat load information at the current moment, calculate the cooling fan operating speed Sfan_request required to meet the current heat dissipation demand, and take the larger value of Sfan_request and Sfan(t1) as the cooling fan control speed Sfan_Target at the current moment.

[0206] Step S506: Based on the speed adjustment characteristics of the electric compressor and the speed adjustment rate characteristics of the cooling fan, calculate the time Tc required for the electric compressor speed to be adjusted from Vc(t0) to Vc(t1) and the time Tfan required for the cooling fan speed to be adjusted from Sfan(t0) to Sfan_Target.

[0207] Step S507: If Vc(t1) > Vc(t0), the electric compressor speeds up. If Tc ≥ Tfan, the cooling fan and compressor are controlled to adjust their speeds synchronously to Sfan_Target and Vc(t1), respectively. If Tc < Tfan, the cooling fan speed is first adjusted to Sfan_Target, and after a time interval ≥ (Tfan-Tc), the compressor speed is adjusted to Vc(t1).

[0208] Step S508: If Vc(t1) > Vc(t0), i.e. the electric compressor slows down, then if Tc ≥ Tfan, the compressor is controlled to slow down to Vc(t1) first. After a time interval ≥ (Tc-Tfan), the cooling fan is controlled to slow down to Sfan_Target. If Tc < Tfan, the cooling fan and the compressor are controlled to slow down synchronously, and their speeds are adjusted to Sfan_Target and Vc(t1) respectively.

[0209] Step S509, Electric compressor speed adjustment: Vc(t0)→Vc(t1), Cooling fan speed: remain unchanged.

[0210] This embodiment is based on the noise masking effect of human hearing. It uses the noise of the condenser cooling fan as the incremental source of the background noise of the air conditioning system. By keeping the noise of the electric compressor and the noise of the cooling fan within a preset difference range, the operating speed range of the electric compressor is significantly increased with a small increase in cost. This provides a new control strategy that balances the cooling capacity and quietness of the air conditioning system in electric vehicles.

[0211] In one embodiment, controlling the condenser cooling fan to stop later than or equal to the stopping of the electric compressor in response to the air conditioner's stop request specifically includes: controlling the electric compressor to stop in response to the air conditioner's stop request, and controlling the condenser cooling fan to stop after the electric compressor stops operating, or

[0212] In response to the air conditioner's stop request, the electric compressor is controlled to stop, and after a preset stop time has elapsed since the electric compressor stopped, the condenser cooling fan is controlled to stop.

[0213] This embodiment adds a response to the air conditioner shutdown request. First, the electric compressor is controlled to shut off to preserve the noise of the cooling fan as background noise, and then the cooling fan is controlled to shut off.

[0214] In one embodiment, responding to a stop request from the air conditioner by controlling the electric compressor to stop, and then controlling the condenser cooling fan to stop after a preset stop time has elapsed since the electric compressor stopped, specifically includes:

[0215] In response to the air conditioner's stop request, the current electric compressor speed is obtained as the compressor operating speed, and the current condenser cooling fan speed is obtained as the cooling fan operating speed.

[0216] The time required for the electric compressor speed to adjust from its operating speed to 0 is calculated as the electric compressor stopping time. The time required for the condenser cooling fan speed to adjust from its operating speed to 0 is calculated as the fan stopping time.

[0217] If the fan stop time is less than or equal to the electric compressor stop time, then control the condenser cooling fan and the electric compressor to stop simultaneously;

[0218] If the fan stop time is greater than the electric compressor stop time, the preset stop time is calculated as the difference between the fan stop time and the electric compressor stop time. The electric compressor is then controlled to disconnect. After the preset stop time has elapsed, the cooling fan is controlled to disconnect.

[0219] The electric compressor speed can be directly adjusted via the ECM. The cooling fan speed can be calculated by adjusting the voltage value at the cooling fan control terminal via the ECM, and then using the corresponding cooling fan speed under the current state as the cooling fan operating speed.

[0220] like Figure 6 The diagram shown is a flowchart of the air conditioning control method when the air conditioner is turned off, according to the preferred embodiment of the present invention, including:

[0221] Step S601: Obtain the operating speed Vc_t0 of the electric compressor and the operating speed Sfan_t0 of the cooling fan during stable operation.

[0222] Step S602: Based on the speed adjustment rate characteristics of the electric compressor and the speed adjustment rate characteristics of the cooling fan, calculate the time Tc required for the electric compressor speed to adjust from Vc_t0 to complete stop.

[0223] Step S603: If Tc≥Tfan, then simultaneously send a stop command to the cooling fan and the compressor.

[0224] In step S604, if Tc < Tfan, a stop command is first sent to the compressor, and after a time interval ≥ (Tfan - Tc), a stop command is then sent to the cooling fan.

[0225] like Figure 14 The diagram shown is a hardware structure schematic of an electronic device according to the present invention, comprising:

[0226] At least one processor 1401; and,

[0227] A memory 1402 is communicatively connected to at least one of the processors 1401; wherein,

[0228] The memory 1402 stores instructions that can be executed by at least one of the processors to enable the at least one of the processors to perform the automotive air conditioning control method as described above.

[0229] Figure 14 Take a processor 1401 as an example.

[0230] The electronic device may also include an input device 1403 and a display device 1404.

[0231] The processor 1401, memory 1402, input device 1403 and display device 1404 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0232] The memory 1402, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the automotive air conditioning control method in the embodiments of this application. Figures 1-6 The method flow is shown. The processor 1401 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory 1402, thereby realizing the automotive air conditioning control method in the above embodiments.

[0233] Specifically, the uses of processor 1401 include:

[0234] (1) When the air conditioning panel parameter settings change, the current vehicle heat load and the adjusted air conditioning panel parameter settings information are called in real time to calculate the cooling fan speed value Sfan(cooling) required for the current vehicle operation and the electric compressor speed value Sc(target) required after adjustment.

[0235] (2) Based on the preset electric compressor speed-noise characteristic curve data, calculate the corresponding electric compressor operating noise value Nc(target) when the electric compressor speed is Sc(target);

[0236] (3) Set the target value △T for noise control of the electric compressor, and calculate the minimum allowable fan noise value Nfan(min) = Nc(target) - △T to meet the current noise control requirements.

[0237] (4) Based on the preset cooling fan speed-noise characteristic curve data, calculate the corresponding cooling fan speed value Sfan(min) when the fan noise value is Nfan(min).

[0238] (5) Calculate the larger of the cooling fan speed values ​​Sfan(cooling) and Sfan(min), and use the result as the recommended cooling fan speed value Sfan(target).

[0239] (6) Based on the preset cooling fan voltage-speed characteristic curve data, calculate the corresponding fan control terminal voltage value Vfan(target) when the fan speed is Sfan(target).

[0240] The memory 1402 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the automotive air conditioning control method, etc. Furthermore, the memory 1402 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1402 may optionally include memory remotely located relative to the processor 1401, and these remote memories may be connected via a network to the apparatus performing the automotive air conditioning control method. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0241] Specifically, the uses of memory 1402 include:

[0242] (1) Call the real-time voltage value Vfan(current) of the cooling fan control terminal;

[0243] (2) Call the real-time speed value Sc(current) of the electric compressor.

[0244] The input device 1403 can receive user clicks and generate signal inputs related to user settings and function control of the vehicle air conditioning control method. The display device 1404 may include a display screen or other display equipment.

[0245] When one or more modules are stored in the memory 1402, and are run by one or more processors 1401, the automotive air conditioning control method in any of the above method embodiments is executed.

[0246] This invention is based on the noise masking effect of human hearing. It utilizes the noise of the condenser cooling fan as an incremental source of background noise in the air conditioning system. By staggering the start-stop time intervals of the cooling fan and the electric compressor, the cooling fan is started in advance and shut down later, increasing the background noise during the start-stop process of the electric compressor and solving the abruptness caused by the sudden change in noise during the start-stop process of the electric compressor. By keeping the operating noise of the electric compressor and the operating noise of the cooling fan within a preset difference range, the operating speed range of the electric compressor is significantly increased with a small increase in cost. This provides a new control strategy for balancing the cooling capacity and quietness of the air conditioning system in electric vehicles.

[0247] One embodiment of the present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all the steps of the automotive air conditioning control method described above.

[0248] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for controlling an automotive air conditioning system, characterized in that, include: In response to the air conditioner's start-up request, the condenser cooling fan is controlled to start earlier than or equal to the start of the electric compressor; In response to the air conditioner's stop request, the condenser cooling fan is controlled to stop later than or equal to the electric compressor's stop. Also includes: In response to the request to adjust the air conditioning settings, the required speed of the electric compressor for the air conditioning system is calculated as the requested speed of the electric compressor. Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, which is the requested speed of the cooling fan. The operating noise is the noise generated when the electric compressor operates at the requested speed. Control the cooling fan to operate at the requested speed. The determination of the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested cooling fan speed, specifically includes: Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor; Determine the operating noise of the second electric compressor corresponding to the operating speed of the electric compressor, wherein the operating speed of the electric compressor is the current operating speed of the electric compressor; If the difference between the operating noise of the first electric compressor and the operating noise of the second electric compressor is greater than or equal to the preset minimum noise change sensitivity trigger value, then the condenser cooling fan speed required to mask the operating noise of the first electric compressor is calculated and used as the requested speed of the cooling fan; otherwise, the electric compressor speed is adjusted to the requested speed, the cooling fan speed is kept constant, and the process ends.

2. The automotive air conditioning control method according to claim 1, characterized in that: The step of controlling the condenser cooling fan to start earlier than or equal to the start of the electric compressor in response to the air conditioner's start request specifically includes: In response to the air conditioner's start request, the condenser cooling fan is controlled to start after a preset start interval, and then the electric compressor is controlled to start, or In response to the start request of the air conditioner, the electric compressor speed required for the air conditioning system to work is calculated as the electric compressor requested speed. The condenser cooling fan speed required to mask the working noise of the electric compressor is determined as the cooling fan requested speed. The working noise is the noise generated when the electric compressor speed is the electric compressor requested speed. The condenser cooling fan is controlled to start. After the condenser cooling fan speed reaches the cooling fan requested speed, the electric compressor is controlled to start. The step of controlling the condenser cooling fan to stop later than or equal to the electric compressor in response to the air conditioner's stop request specifically includes: In response to the air conditioner's stop request, the electric compressor is controlled to stop; after the electric compressor stops operating, the condenser cooling fan is controlled to stop, or... In response to the air conditioner's stop request, the electric compressor is controlled to stop, and after a preset stop time has elapsed since the electric compressor stopped, the condenser cooling fan is controlled to stop.

3. The automotive air conditioning control method according to claim 2, characterized in that, In response to the air conditioner's start request, controlling the condenser cooling fan to start after a preset start interval time, and then controlling the electric compressor to start, specifically includes: In response to the air conditioner's start-up request, the required electric compressor speed for the air conditioning system to operate is calculated as the requested electric compressor speed. Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, where the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor; The time required for the electric compressor speed to adjust from 0 to the requested speed is calculated as the electric compressor start-up time, and the time required for the condenser cooling fan speed to adjust from 0 to the requested speed is calculated as the fan start-up time. If the fan start time is less than or equal to the electric compressor start time, then the condenser cooling fan and the electric compressor are controlled to start simultaneously, and the condenser cooling fan speed is adjusted to the requested speed, and the electric compressor speed is adjusted to the requested speed. If the fan start time is longer than the electric compressor start time, then the preset start interval is calculated as the difference between the fan start time and the electric compressor start time. The condenser cooling fan is then started, and the condenser cooling fan speed is adjusted to the requested speed. After the preset start interval of the condenser cooling fan start, the electric compressor is started, and the electric compressor speed is adjusted to the requested speed.

4. The automotive air conditioning control method according to claim 2, characterized in that, In response to a stop request from the air conditioner, the electric compressor is controlled to stop, and after a preset stop time has elapsed since the electric compressor stopped, the condenser cooling fan is controlled to stop. Specifically, this includes: In response to the air conditioner's stop request, the current electric compressor speed is obtained as the compressor operating speed, and the current condenser cooling fan speed is obtained as the cooling fan operating speed. The time required for the electric compressor speed to adjust from its operating speed to 0 is calculated as the electric compressor stopping time; the time required for the condenser cooling fan speed to adjust from its operating speed to 0 is calculated as the fan stopping time. If the fan stop time is less than or equal to the electric compressor stop time, then control the condenser cooling fan and the electric compressor to stop simultaneously; If the fan stop time is greater than the electric compressor stop time, the preset stop time is calculated as the difference between the fan stop time and the electric compressor stop time. The electric compressor is then controlled to disconnect. After the preset stop time has elapsed, the cooling fan is controlled to disconnect.

5. The automotive air conditioning control method according to claim 1, characterized in that: The step of responding to the air conditioning setting parameter adjustment request by calculating the electric compressor speed required for the air conditioning system to operate as the requested electric compressor speed specifically includes: The electric compressor speed under the current state is obtained as the electric compressor operating speed; the current vehicle heat load and the air conditioning setting parameters requested by the air conditioning state change are obtained. Based on the current vehicle heat load and the requested air conditioning temperature setting information, the electric compressor speed required for the air conditioning system to operate is calculated as the requested electric compressor speed. The determination of the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested cooling fan speed, wherein the operating noise is the noise generated when the electric compressor operates at the requested speed, and controlling the cooling fan to operate at the requested speed specifically includes: Determine the required condenser cooling fan speed to mask the operating noise of the electric compressor, as the requested speed of the cooling fan, where the operating noise is the noise generated when the electric compressor speed is the requested speed of the electric compressor; If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval time, the electric compressor is controlled to adjust its speed to the requested speed. If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed.

6. The automotive air conditioning control method according to claim 5, characterized in that: Obtaining air conditioner setting parameters, specifically including: obtaining the current cooling fan speed as the cooling fan operating speed; If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, then the condenser cooling fan is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the electric compressor is controlled to adjust its speed to the requested speed. Specifically, this includes: The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time. If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and adjust the speed of the electric compressor to the requested speed of the electric compressor. If the requested speed of the electric compressor is greater than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the preset adjustment interval is calculated as the difference between the fan adjustment time and the electric compressor adjustment time. The condenser cooling fan is then controlled to adjust its speed to the requested speed. After the preset adjustment interval is reached, the electric compressor is controlled to adjust its speed to the requested speed. If the requested speed of the electric compressor is less than the operating speed of the electric compressor, then the electric compressor is controlled to adjust its speed to the requested speed. After a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed. Specifically, this includes: The time required for the electric compressor speed to adjust from its operating speed to its requested speed is calculated as the electric compressor adjustment time. The time required for the cooling fan speed to adjust from its operating speed to its requested speed is calculated as the fan adjustment time. If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is greater than or equal to the adjustment time of the fan, then the electric compressor is controlled to adjust its speed to the requested speed. After the electric compressor is controlled to adjust its speed for a preset adjustment interval, the condenser cooling fan is controlled to adjust its speed to the requested speed. If the requested speed of the electric compressor is less than the operating speed of the electric compressor, and the adjustment time of the electric compressor is less than the adjustment time of the fan, then the condenser cooling fan and the electric compressor are controlled to synchronously adjust the speed of the condenser cooling fan to the requested speed of the cooling fan, and the speed of the electric compressor is adjusted to the requested speed of the electric compressor.

7. The automotive air conditioning control method according to any one of claims 2 to 6, characterized in that, The condenser cooling fan speed required to mask the operating noise of the electric compressor is defined as the requested speed of the cooling fan. The operating noise is the noise generated when the electric compressor speed is the requested speed, specifically including: Determine the operating noise of the first electric compressor corresponding to the requested speed of the electric compressor; Calculate the background noise required to mask the operating noise of the first electric compressor; Determine the required fan speed to meet the background noise level.

8. The automotive air conditioning control method according to claim 7, characterized in that, The calculation of the background noise required to mask the operating noise of the first electric compressor specifically includes: The background noise required to mask the operating noise of the first electric compressor is calculated as Nc-ΔT, where Nc is the operating noise of the first electric compressor and ΔT is the management target value of the operating noise of the first electric compressor.

9. The automotive air conditioning control method according to claim 8, characterized in that, Determining the requested fan speed to satisfy the background noise specifically includes: Determine the requested speed of the first cooling fan corresponding to the background noise; Obtain the vehicle's current cooling demand information and determine the required rotational speed of the second cooling fan to meet the current vehicle cooling demand; The maximum value of the first cooling fan's requested speed and the second cooling fan's requested speed is selected as the cooling fan's requested speed to satisfy the background noise.

10. An electronic device, characterized in that, include: At least one processor; And a memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by at least one of the processors to enable at least one of the processors to perform the automotive air conditioning control method as described in any one of claims 1 to 9.

11. A storage medium, characterized in that, The storage medium stores computer instructions, which, when executed by the computer, are used to perform all the steps of the automotive air conditioning control method as described in any one of claims 1 to 9.

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