Automobile air conditioner noise reduction control method and system

Abstract

The invention discloses an automobile air conditioner noise reduction control method and system.The method comprises the steps that the operation state of an air conditioner is monitored in real time, and when it is detected that the state of the air conditioner changes, working voltage data of an air blower are collected immediately; and in the air conditioner operation state switching process, the working voltage of the air blower is adjusted so as to reduce noise in the air conditioner operation state switching process. The method has the advantages that the defect that noise is increased when the air outlet mode is adjusted is overcome, the noise is lower when the air door is adjusted, and the driving comfort feeling is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile air-conditioning control, and in particular to an automobile air-conditioning noise reduction control method and system. Background Art

[0002] As a key component of a vehicle, car air conditioning is crucial for regulating the air and temperature inside the vehicle. As vehicle hardware capabilities mature, so too do people's expectations for vehicle software, such as in-vehicle comfort, interior environment, and air quality. This has led to a need for improvements and controls in vehicle air conditioning to better meet user expectations for a superior user experience.

[0003] On the air-conditioning side, the softness of the air outlet and the noise are generally considered. In terms of the softness of the air outlet, the purpose of soft air outlet can be achieved by improving the structures such as the air-conditioning air duct and the air guide plate. For example, the air outlet assembly of a car, the air-conditioning device for a car and the car with patent application number 202121412850.4, by arranging air guide holes on the damper, when the air conditioner is turned on, the damper is closed, and the air flow passes through the air guide holes. The air guide holes disperse the air flow into scattered airflow. The multiple scattered airflows interfere with each other, forming a large number of turbulent areas at the rear end of the damper. While the air volume is appropriately reduced, the wind speed at the air outlet is greatly reduced, making the wind blowing to the user softer.

[0004] However, in the field of air conditioning noise elimination, the existing technology often uses sound insulation to reduce the noise of air conditioning operation. This method can indeed reduce the noise during normal operation of the air conditioner, but when the air conditioner switches to damper mode, due to the collision between the air outlet and the damper, when the air outlet pressure is large, the air outlet blows on the changing damper, which will generate large wind noise at a specific angle, and the noise generated affects the user experience. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a method and system for controlling noise reduction in an automobile air conditioner, so as to solve the defect of increased noise when adjusting the air outlet mode.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a method for controlling noise reduction of automobile air conditioner, comprising real-time monitoring of the operating status of the air conditioner, and immediately collecting the operating voltage data of the blower when a change in the air conditioner status is detected, and adjusting the operating voltage of the blower during the switching process of the air conditioner operating status to reduce the noise during the switching process of the air conditioner operating status.

[0007] The air outlet mode of the air conditioner is monitored in real time. When the air outlet mode changes, the air conditioner control adjusts the air outlet damper to complete the mode switch. Between the start of the mode switch and the completion of the switch, the operating voltage of the blower is adjusted to reduce the wind noise during the mode switch.

[0008] The working voltage threshold of the blower is pre-calibrated. When the air outlet mode changes, the collected working voltage of the blower is compared with the working voltage threshold. When the working voltage of the blower is greater than the working voltage threshold, the working voltage of the blower is controlled to be lowered below the working voltage threshold, and the air outlet mode switching status is monitored in real time. When the air outlet mode is switched, the working voltage of the blower is restored to the working voltage when the air outlet mode changed.

[0009] The blower operating voltage when the air outlet mode changes is recorded as a memory voltage. The blower voltage adjustment command issued by the air conditioner is monitored in real time during the air outlet mode switching process. The memory voltage is updated according to the blower voltage adjustment command. After the air outlet mode switching is completed, the blower operating voltage is restored to the memory voltage.

[0010] When the air outlet mode changes, if the blower operating voltage is ≤ the operating voltage threshold, the blower operating voltage is kept unchanged or reduced, and the air conditioner blower operating voltage adjustment instruction is delayed until the air outlet mode is switched and the operating voltage adjustment is performed.

[0011] During the switching of the air outlet mode, the blower operating voltage is adjusted to be lower than the operating voltage threshold, and then the wind noise in the air outlet duct is collected, and the blower operating voltage is fine-tuned according to the wind noise.

[0012] When the blower operating voltage is less than the operating voltage threshold, the operating voltage is reduced and the wind noise after the reduction is collected. The wind noise levels before and after the reduction are compared to determine the adjustment direction of the blower operating voltage.

[0013] When the wind noise decreases after adjustment, reduce the working voltage of the blower again until the wind noise increases or remains unchanged before and after adjustment; when the wind noise increases before and after adjustment, increase the working voltage of the blower and compare the changes in wind noise after increasing the working voltage. If the wind noise decreases, continue to increase the working voltage, otherwise keep the wind noise unchanged or decrease.

[0014] An automobile air-conditioning noise reduction control system, the system comprising

[0015] Air conditioning status acquisition module, used to monitor the operating status of the air conditioner in real time;

[0016] The blower operating voltage acquisition module is used to immediately collect the blower operating voltage data when a change in the air conditioning state is detected;

[0017] The blower control module is used to adjust the operating voltage of the blower during the switching of the air conditioning operation state.

[0018] The system also includes a mode switching monitoring module, which is used to monitor whether the air outlet mode switching is completed. Between the start of the mode switching and the completion of the switching, the blower control module reduces the wind noise during the mode switching process by adjusting the operating voltage of the blower.

[0019] The advantages of this invention are that it resolves the problem of increased noise during airflow mode adjustment, achieving even lower noise levels during damper adjustment, thereby enhancing driving comfort. By varying the damper and blower voltage control strategies for the airflow mode, this effectively reduces the noise caused by airflow mode switching while maintaining air conditioning performance. This provides a quiet and comfortable driving environment for drivers and passengers, enhancing their comfort. This technical solution can be widely applied to solve similar problems in all projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents and symbols in the drawings of the present invention:

[0021] Figure 1 This is a principle flow chart of the air conditioner noise reduction control method of the present invention. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[0023] This solution primarily addresses the existing problem of excessive blower operating voltage when switching between air outlet modes, resulting in higher air volume and force. This higher wind flows through the air duct, and switching the air outlet mode causes the damper to change. This damper change alters the relationship between the air outlet and the damper. The airflow hits the damper at different locations as the damper angle changes. This damper change can increase noise and even produce a whistling sound, impacting the user experience. Based on this solution, a noise reduction control strategy is designed to control the blower voltage accordingly when the air outlet mode changes, thereby reducing wind noise.

[0024] The main purpose of the control strategy of this solution is to improve driving comfort. The solutions adopted can be roughly summarized into two methods:

[0025] When the air outlet mode changes, if the blower operating voltage is greater than the voltage threshold, the blower voltage will first slowly decrease to the threshold. After the air outlet mode switch is completed, the blower voltage will slowly return to the previous voltage value.

[0026] When the air outlet mode changes, if the blower voltage is ≤ the threshold, the blower voltage is not allowed to exceed the threshold first. After the air outlet mode is switched, it can be increased to exceed the threshold.

[0027] The present invention adopts the above-mentioned technical solution. By changing the air outlet mode damper and blower voltage control strategy, it effectively reduces the air outlet noise caused by the switching of the air outlet mode while taking into account the air-conditioning performance, providing drivers and passengers with a quiet and comfortable driving space and improving driving comfort. The above-mentioned technical solution can be promoted and applied when solving similar problems in all projects.

[0028] The following are the details of the plan:

[0029] like Figure 1 As shown, a method for controlling noise reduction of automobile air conditioner includes real-time monitoring of the operating status of the air conditioner. When a change in the air conditioner status is detected, the operating voltage data of the blower is immediately collected. The operating voltage of the blower is adjusted during the switching process of the air conditioner operating status to reduce the noise during the switching process of the air conditioner operating status.

[0030] Real-time monitoring of the operating status of the air conditioner includes the air outlet mode of the air conditioner. The air outlet mode includes modes such as blowing on the face and blowing on the feet. After the user switches the air outlet mode through the control button or voice, the air conditioner will control the air outlet damper to switch after receiving the command to change the air outlet mode. The switch to the corresponding air outlet mode can be completed through a short switch. During the switching process, this solution keeps the working voltage of the blower at a lower working voltage position to avoid the collision of strong wind and damper to produce strong noise. In order to achieve this goal, the air outlet mode of the air conditioner is monitored in real time in this solution. When the air outlet mode changes, the controller of the air conditioner controls and adjusts the air outlet damper to complete the mode switch. Between the start of the mode switch and the completion of the switch, the working voltage of the blower is adjusted to reduce the wind noise during the mode switch.

[0031] In a preferred embodiment, adjusting the working voltage of the blower to reduce the wind noise during the switching process mainly involves lowering the working voltage of the blower to a certain level so that the wind speed is not too high and does not generate a large noise between the blowing and the damper. The working voltage threshold of the blower is pre-calibrated. When the air outlet mode changes, the collected working voltage of the blower is compared with the working voltage threshold. When the working voltage of the blower is greater than the working voltage threshold, the working voltage of the blower is controlled to be lowered below the working voltage threshold, and the air outlet mode switching status is monitored in real time. When the air outlet mode is switched, the working voltage of the blower is restored to the working voltage when the air outlet mode changes. The working voltage threshold is calibrated in advance through experiments, and the maximum value of the blower working voltage that meets the noise requirements is obtained as the threshold. In this way, when the working voltage is controlled to be less than the working threshold during the switching process, the noise is also within an acceptable range or a relatively small range, thereby satisfying the user experience.

[0032] Since the blower's operating voltage needs to be restored after it decreases, the blower's operating voltage needs to be recorded and the operating voltage before adjustment needs to be memorized to provide a basis for subsequent recovery. The blower's operating voltage when the air outlet mode changes is recorded as a memory voltage. During the air outlet mode switching process, the blower voltage adjustment instructions issued by the air conditioner are monitored in real time. The memory voltage is updated based on the blower voltage adjustment instructions. After the air outlet mode switching is completed, the blower's operating voltage is restored to the memory voltage. When the air outlet mode changes, the current blower operating voltage is recorded, and then the blower's operating voltage is lowered to below the operating voltage threshold according to the control strategy. During the switching process, the blower operating voltage instructions issued by the user are monitored in real time, and the memory voltage is updated based on the instructions. After the switching is completed, the blower operating voltage is restored to the memory voltage. User operating voltage instructions refer to instructions such as air volume and wind speed level entered by the user through air conditioner buttons, switches, voice, etc. By converting them, the corresponding blower operating voltage instructions can be obtained and updated.

[0033] When the airflow mode changes, if the blower operating voltage is less than or equal to the operating voltage threshold, the blower operating voltage is maintained or reduced, and the blower operating voltage adjustment command is delayed until the airflow mode switch is complete. Since the voltage is less than the operating voltage threshold, the blower operating voltage is not required, or it is reduced to further reduce noise.

[0034] In a preferred embodiment, in order to further reduce wind noise during mode switching, while the blower operating voltage is maintained below the operating voltage threshold, the operating voltage can be further adjusted based on the collected noise. During the air outlet mode switching process, the blower operating voltage is adjusted to below the operating voltage threshold, and then the wind noise in the air outlet duct is collected. The blower operating voltage is fine-tuned based on the wind noise. A wind noise sensor is set in the air duct to collect real-time wind noise data. Then, while ensuring that the operating voltage is below the threshold, the blower operating voltage is increased or decreased. The wind noise changes after the increase or decrease are compared, and the blower operating voltage is further adjusted based on the wind noise changes. If the wind noise remains unchanged after increasing or decreasing the blower operating voltage, the operating voltage adjustment is stopped. If the wind noise increases after increasing or decreasing the blower operating voltage, the blower operating voltage is restored to the original state or the blower operating voltage is adjusted in the opposite direction. If the wind noise decreases, the blower operating voltage is further adjusted according to the current adjustment direction to achieve the lowest possible noise during the mode switching time. Within the range where the blower operating voltage is less than the operating voltage threshold, the operating voltage is reduced and the wind noise after the reduction is collected. The wind noise levels before and after the reduction are compared to determine the direction of blower operating voltage adjustment. If the wind noise decreases after adjustment, the blower operating voltage is further reduced until the wind noise increases or remains unchanged. If the wind noise increases before and after adjustment, the blower operating voltage is increased and the wind noise changes after the increased operating voltage are compared. If the wind noise decreases, the operating voltage is further increased. Otherwise, the wind noise remains unchanged or decreases.

[0035] This embodiment also provides a car air-conditioning noise reduction control system, the control system includes

[0036] Air conditioning status acquisition module, used to monitor the operating status of the air conditioner in real time and collect the changes in the air outlet mode;

[0037] The blower operating voltage acquisition module is used to immediately collect the blower operating voltage data when a change in the air conditioning state is detected;

[0038] The blower control module is used to adjust the operating voltage of the blower during the switching of the air conditioning operation state.

[0039] The mode switching monitoring module is used to monitor whether the air outlet mode switching is completed. Between the start of the mode switching and the completion of the switching, the blower control module reduces the wind noise during the mode switching process by adjusting the operating voltage of the blower.

[0040] The wind noise collection module is used to collect wind noise data in the air duct.

[0041] The blower control module is connected to the air conditioner status acquisition module, the blower operating voltage acquisition module, the mode switching monitoring module, and the wind noise acquisition module to collect relevant data. The blower control module can be implemented by the air conditioner controller. The air conditioner controller uses the automotive air conditioner noise reduction control method described in the above embodiment to control the blower operating voltage, thereby achieving noise reduction during air flow mode switching.

[0042] The present invention relates to an automobile air conditioner, and belongs to the technical field of automatic adjustment of air conditioning systems. Specifically, a control strategy that takes into account both air conditioning performance and NVH in the process of adjusting the air outlet mode of the automobile air conditioner is provided. Figure 1 As shown, the control strategy of the present invention is a new air outlet mode and blower voltage control method. In order to overcome the defects of the prior art and achieve the invention goal of improving driving comfort, the technical solution adopted by the present invention is:

[0043] When the air outlet mode changes, if the blower voltage is greater than the threshold, the blower voltage will first slowly decrease to the threshold. After the air outlet mode switch is completed, the blower voltage will slowly return to the previous voltage value.

[0044] When the air outlet mode changes, if the blower voltage is ≤ the threshold, the blower voltage is not allowed to exceed the threshold first. After the air outlet mode is switched, it can be increased to exceed the threshold.

[0045] The beneficial effects of adopting the above technical solution are:

[0046] While taking into account the performance of air conditioning, it effectively reduces the air noise caused by switching the air outlet mode; improves driving comfort, provides a quiet and comfortable driving space for drivers and passengers, and improves driver and passenger satisfaction; this technical solution can be promoted and applied when solving similar problems in all projects.

[0047] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A method for controlling noise reduction of an automobile air conditioner, characterized in that: It includes real-time monitoring of the operating status of the air conditioner. When a change in the air conditioner status is detected, the operating voltage data of the blower is immediately collected. During the switching of the air conditioner operating status, the operating voltage of the blower is adjusted to reduce the noise during the switching of the air conditioner operating status.

2. The automobile air conditioner noise reduction control method according to claim 1, characterized in that: The air outlet mode of the air conditioner is monitored in real time. When the air outlet mode changes, the air conditioner control adjusts the air outlet damper to complete the mode switch. Between the start of the mode switch and the completion of the switch, the operating voltage of the blower is adjusted to reduce the wind noise during the mode switch.

3. The automobile air conditioner noise reduction control method according to claim 2, characterized in that: The working voltage threshold of the blower is pre-calibrated. When the air outlet mode changes, the collected working voltage of the blower is compared with the working voltage threshold. When the working voltage of the blower is greater than the working voltage threshold, the working voltage of the blower is controlled to be lowered below the working voltage threshold, and the air outlet mode switching status is monitored in real time. When the air outlet mode is switched, the working voltage of the blower is restored to the working voltage when the air outlet mode changed.

4. The automobile air conditioner noise reduction control method according to claim 3, characterized in that: The blower operating voltage when the air outlet mode changes is recorded as a memory voltage. The blower voltage adjustment command issued by the air conditioner is monitored in real time during the air outlet mode switching process. The memory voltage is updated according to the blower voltage adjustment command. After the air outlet mode switching is completed, the blower operating voltage is restored to the memory voltage.

5. The automobile air conditioner noise reduction control method according to claim 3, characterized in that: When the air outlet mode changes, if the blower operating voltage is ≤ the operating voltage threshold, the blower operating voltage is kept unchanged or reduced, and the air conditioner blower operating voltage adjustment instruction is delayed until the air outlet mode is switched and the operating voltage adjustment is performed.

6. The automobile air conditioner noise reduction control method according to claim 4 or 5, characterized in that: During the switching of the air outlet mode, the blower operating voltage is adjusted to be lower than the operating voltage threshold, and then the wind noise in the air outlet duct is collected, and the blower operating voltage is fine-tuned according to the wind noise.

7. The automobile air conditioner noise reduction control method according to claim 6, characterized in that: When the blower operating voltage is less than the operating voltage threshold, the operating voltage is reduced and the wind noise after the reduction is collected. The wind noise levels before and after the reduction are compared to determine the adjustment direction of the blower operating voltage.

8. The automobile air conditioner noise reduction control method according to claim 7, characterized in that: When the wind noise decreases after adjustment, reduce the working voltage of the blower again until the wind noise increases or remains unchanged before and after adjustment; when the wind noise increases before and after adjustment, increase the working voltage of the blower and compare the changes in wind noise after increasing the working voltage. If the wind noise decreases, continue to increase the working voltage, otherwise keep the wind noise unchanged or decrease.

9. An automobile air-conditioning noise reduction control system, characterized by: The system includes Air conditioning status acquisition module, used to monitor the operating status of the air conditioner in real time; The blower operating voltage acquisition module is used to immediately collect the blower operating voltage data when a change in the air conditioning state is detected; The blower control module is used to adjust the operating voltage of the blower during the switching of the air conditioning operation state.

10. The automobile air-conditioning noise reduction control system according to claim 9, characterized in that: The system also includes a mode switching monitoring module, which is used to monitor whether the air outlet mode switching is completed. Between the start of the mode switching and the completion of the switching, the blower control module reduces the wind noise during the mode switching process by adjusting the operating voltage of the blower.

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