Noise control method of cooling fan, controller, vehicle-mounted refrigerator and storage medium
By dynamically adjusting the cooling fan speed by monitoring the compressor's operating status, the problem of excessive noise from the vehicle refrigerator's cooling fan was solved, achieving a balance between noise and heat dissipation, thus improving user experience and extending equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-05-15
AI Technical Summary
Existing vehicle refrigerator cooling fans operate at a constant speed, resulting in excessive noise when the compressor load is low, and failing to effectively balance the cooling capacity and noise.
By monitoring the compressor's operating power and cumulative operating time, the heat dissipation demand and noise level are calculated, and the speed of the cooling fan is dynamically adjusted to match the current noise and heat dissipation requirements.
It achieves noise reduction, effective heat dissipation, improved user comfort, extended equipment life, and reduced energy consumption under different load conditions.
Smart Images
Figure CN122040648A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and in particular to a noise control method for a cooling fan, a controller, an in-vehicle refrigerator, and a storage medium. Background Technology
[0002] With the increasing popularity and development of vehicles, in-vehicle refrigerators are usually installed so that passengers can enjoy chilled fruits, drinks and other food while traveling, thus enhancing their travel experience.
[0003] The cooling fans in existing car refrigerators typically rotate at a constant speed. The cooling capacity of a cooling fan rotating at a constant speed is fixed. While the cooling capacity of the cooling fan is sufficient to meet the cooling requirements of the compressor under high load, the cooling capacity of the cooling fan becomes excessive when the compressor is running under low load, resulting in excessive noise. Summary of the Invention
[0004] This application provides a noise control method, controller, vehicle refrigerator, and storage medium for a cooling fan. The method can adjust the speed of the cooling fan based on the current operating power and current cumulative operating time of the compressor, which helps to reduce the noise of the cooling fan.
[0005] To address the aforementioned technical problems, the embodiments of this application provide the following technical solutions: In a first aspect of this application, a noise control method for a cooling fan is provided, the cooling fan being used to dissipate heat from a compressor of a vehicle refrigerator, the method comprising: monitoring the current operating power and current cumulative operating time of the compressor; calculating the current heat dissipation demand of the compressor based on the current operating power and the current cumulative operating time; calculating the current noise index of the cooling fan based on the current heat dissipation demand; calculating a first theoretical rotational speed based on the current noise index, the first theoretical rotational speed representing the rotational speed of the cooling fan corresponding to the current noise index; and controlling the rotation of the cooling fan based on the first theoretical rotational speed.
[0006] In embodiments of this application, the controller can monitor the current operating power of the compressor. and current cumulative working hours ,based on and Calculate the current heat dissipation requirements of the compressor. Based on Calculate the current noise level of the cooling fan. ,based on Calculate the first theoretical rotational speed, and control the rotation of the cooling fan based on the first theoretical rotational speed. Typically, if... and The larger the size, the more heat the compressor generates. The larger the value, the higher the corresponding noise level. The larger the value and the greater the theoretical rotational speed; while if and The smaller the value, the less heat the compressor generates. The smaller the value, the lower the corresponding noise level. The first theoretical rotational speed is also smaller. Therefore, the controller can be based on... and Controlling the rotation of the cooling fan to adjust its speed can help control the noise generated by the cooling fan and reduce its noise level.
[0007] In some embodiments, The current heat dissipation requirement of the compressor is calculated based on the current operating power and the current cumulative operating time, including: Determine the heat dissipation model equations; Substituting the current operating power and the current cumulative operating time into the heat dissipation model equation, we obtain the current heat dissipation requirement of the compressor; The heat dissipation model equation reflects the relationship between the heat dissipation demand of the compressor and the operating power and cumulative operating time of the compressor, respectively. The heat dissipation model equation also reflects the relationship between the heat dissipation demand of the compressor and the coupling result, which is the mutual coupling effect of the operating power and the cumulative operating time.
[0008] In some embodiments, the product of the compressor's operating power and the compressor's cumulative operating time is used to represent the coupling effect between the operating power and the cumulative operating time; wherein, the mathematical expression of the heat dissipation model equation is as follows:
[0009] in, Used to indicate the heat dissipation requirement of the compressor; Used to indicate the operating power of the compressor; Used to indicate the cumulative operating time of the compressor; , and All are constants.
[0010] In some embodiments, the current noise level of the cooling fan and the current heat dissipation demand of the compressor have a first power function relationship; calculating the current noise level of the cooling fan based on the current heat dissipation demand includes: calculating the current noise level corresponding to the current heat dissipation demand based on the current heat dissipation demand and the first power function relationship. .
[0011] In some embodiments, the mathematical expression for the first power function relationship is as follows:
[0012] in, The noise level of the cooling fan is used to indicate its noise level. Used to indicate the heat dissipation requirement of the compressor; , , and All are constants.
[0013] In some embodiments, the current noise level of the cooling fan and the rotational speed of the cooling fan have a second power function relationship; calculating the first theoretical rotational speed based on the current noise level includes: calculating the first theoretical rotational speed based on the current noise level and the second power function relationship; wherein, the mathematical expression of the second power function relationship is as follows:
[0014] in, The noise level of the cooling fan is used to indicate its noise level. Used to represent the and It is a constant.
[0015] In some embodiments, controlling the cooling fan to rotate based on the first theoretical speed includes: calculating a second theoretical speed based on the current operating power, the second theoretical speed representing the speed of the cooling fan corresponding to the current operating power; if the second theoretical speed is determined to be less than the first theoretical speed, then controlling the cooling fan to rotate based on the first theoretical speed; if the second theoretical speed is determined to be not less than the first theoretical speed, then controlling the cooling fan to rotate based on the second theoretical speed.
[0016] In some embodiments, there is a linear relationship between the current heat dissipation demand of the compressor and the rotational speed of the cooling fan; the calculation of the second theoretical rotational speed based on the current operating power includes: calculating the second theoretical rotational speed based on the current operating power and the linear relationship; wherein, the mathematical expression of the linear relationship is as follows:
[0017] in, Used to represent the Used to indicate the heat dissipation requirement of the compressor; and It is a constant.
[0018] In a second aspect of this application, a controller is also provided, the controller including at least one processor; and a memory communicatively connected to said at least one processor; wherein the memory stores instructions executable by said at least one processor, said instructions being executed by said at least one processor to enable said at least one processor to perform the method described in the first aspect.
[0019] In a third aspect of this application, a vehicle refrigerator is also provided, which includes the controller described in the second aspect.
[0020] In a fourth aspect of this application, a non-volatile computer-readable storage medium is also provided, characterized in that the computer-readable storage medium stores computer-executable instructions that, when executed, can perform the method described in the first aspect.
[0021] It should be understood that the description in the Summary of the Invention section is not intended to limit the key or essential features of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0023] Figure 1 These are schematic diagrams of the hardware structure of a vehicle provided in some embodiments of this application; Figure 2 These are schematic diagrams of the hardware structure of a vehicle refrigerator provided in some embodiments of this application; Figure 3 This is a flowchart illustrating a noise control method for a cooling fan provided in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a controller for performing a noise control method for a cooling fan, provided in some embodiments of this application. Detailed Implementation
[0024] The principles and spirit of this disclosure will be described below with reference to several exemplary embodiments illustrated in the accompanying drawings. It should be understood that these specific embodiments are described merely to enable those skilled in the art to better understand and implement this disclosure, and are not intended to limit the scope of this disclosure in any way. In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.
[0025] As used herein, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "an embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects and are used only to distinguish the objects referred to, without implying a particular spatial order, temporal order, order of importance, etc., of the objects referred to.
[0026] For example, Figure 1 Structural schematic diagrams of vehicles provided in some embodiments of this application are presented. For example... Figure 1 The vehicle 10 includes a center console 11 and a vehicle refrigerator 12 installed on the vehicle body. The center console 11 is communicatively connected to the vehicle refrigerator 12 to control the vehicle refrigerator 12. For example, the center console 11 can control the vehicle refrigerator 12 to turn on or off, and can also set the operating mode of the vehicle refrigerator 12 and the corresponding operating parameters, etc.
[0027] Vehicle 10 refers to a means of transportation driven or towed by a power unit for the purpose of carrying passengers or transporting goods; for example, a car, truck, or RV. The vehicle body serves to fix and house the onboard refrigerator 12 and the center console 11, etc. The vehicle body may have a driver's cabin for the driver to sit in. The driver can control the vehicle 10 through a control system (e.g., the center console 11, drive system, and braking system) located in the driver's cabin. The onboard refrigerator 12 may be located in the driver's cabin to allow the driver or passengers to easily access items placed inside, such as food or medicine. The onboard refrigerator 12 can be used to refrigerate the items placed inside it.
[0028] For example, Figure 2 The document presents schematic diagrams of the hardware structure of a vehicle-mounted refrigerator according to some embodiments of this application. For example... Figure 2As shown, the vehicle-mounted refrigerator 200 includes a controller 210 and a refrigerant circulation system 220 and a cooling fan 230 that are communicatively connected to the controller 210. The refrigerant circulation system 220 includes a compressor 221, a condenser 222, a throttling structure 223 (e.g., a capillary tube / expansion valve), and an evaporator 224. The compressor 221, condenser 222, throttling structure 223, and evaporator 224 are sequentially connected via pipelines along the refrigerant circulation direction, forming a circulation loop; the refrigerant can undergo a phase change along the circulation loop.
[0029] When the refrigerant circulation system 220 is operating, the compressor 221 compresses the gaseous refrigerant returning from the evaporator 224. The temperature of the compressed gaseous refrigerant rises and exceeds the ambient temperature. When the compressed gaseous refrigerant is sent into the condenser 222, it releases heat to the outside through the condenser 222. At the same time, the controller controls the cooling fan 230 to rotate, driving airflow so that the cold air carries away the hot air from the surface of the condenser, thereby increasing the heat exchange rate between the gaseous refrigerant in the condenser and the outside air. This allows the gaseous refrigerant to complete the phase change from gaseous to liquid more quickly, ensuring a smooth refrigeration cycle.
[0030] The heat generated by the compressor 221 during operation needs to be dissipated by the cooling fan 230. Generally, the higher the compressor load, the more heat is generated; the lower the compressor load, the less heat is generated. However, the cooling fans in existing car refrigerators typically rotate at a constant speed. The cooling capacity of a cooling fan rotating at a constant speed is fixed. When the cooling capacity of the cooling fan meets the cooling requirements of the compressor under high load, the cooling capacity of the cooling fan becomes excessive when the compressor is running under low load, resulting in excessive noise. Based on this, embodiments of this application provide a method for controlling the noise of a cooling fan, a controller, a car refrigerator, and a storage medium, which can control the noise based on the current operating power of the compressor. and current cumulative working hours A first theoretical rotational speed that satisfies the current noise level is determined, and the rotation of the cooling fan is controlled based on this first theoretical rotational speed to adjust the cooling fan speed, thereby achieving noise control of the cooling fan. To facilitate the reader's understanding of this application, specific embodiments are described below.
[0031] For example, Figure 3 The present application provides flowcharts illustrating a noise control method for a cooling fan according to some embodiments, which is applied to a vehicle refrigerator, for example. Figure 2 The car refrigerator 200, such as Figure 3 As shown, the method includes the following steps: Step S21: The controller monitors the compressor's current operating power and current cumulative operating time.
[0032] Specifically, in some embodiments, the controller can monitor the current operating power of the compressor at preset time intervals. and the current cumulative operating time of the compressor In other embodiments, the controller can also monitor the compressor's current operating power in real time. and the current cumulative operating time of the compressor The compressor's current operating power It can reflect the compressor's current workload and current heat dissipation requirements.
[0033] Step S22: The controller calculates the current heat dissipation demand of the compressor based on the current operating power and the current cumulative operating time.
[0034] In some embodiments, step S22 specifically includes: the controller determining the heat dissipation model equation, and then... and Substituting the heat dissipation model equations, we obtain the current heat dissipation requirement of the compressor. Among them, the heat dissipation model equation reflects the heat dissipation demand of the compressor. Each is related to the operating power of the compressor Cumulative operating time of the compressor The relationship between the compressor's heat dissipation requirements and the coupling result is reflected in the heat dissipation model equations, which also show the relationship between the compressor's heat dissipation requirements and the coupling result, which is the operating power. and cumulative working hours The mutual coupling effect.
[0035] In some embodiments, and product Used to indicate operating power and cumulative working hours The mutual coupling effect; the mathematical expression of the heat dissipation model equation is as follows: Formula (1) in, Used to indicate the heat dissipation requirements of the compressor; Used to indicate the operating power of the compressor; Used to indicate the cumulative operating time of the compressor; , and All are constants.
[0036] In formula (1), , and As variables, , and All are constants. Operating power Heat dissipation requirements The influence coefficient; Cumulative working hours Heat dissipation requirements The influence coefficient; Operating power With cumulative working hours The mutual coupling effect on heat dissipation demand The influence coefficient.
[0037] Specifically, in some embodiments, the method for obtaining the heat dissipation model equation is as follows: the controller establishes an initial heat dissipation model equation, which includes model parameters to be calibrated (unknown); the controller calibrates the model parameters to be calibrated in the initial heat dissipation model equation to obtain the heat dissipation model equation.
[0038] In some embodiments, the initial heat dissipation model equations are established as follows: the controller determines the heat dissipation requirements of the compressor. With the operating power of the compressor Functional relationship between The controller determines the compressor's heat dissipation requirements. Cumulative operating time of the compressor Functional relationship between The controller determines the cumulative operating time of the compressor. and operating power The mutual coupling effect between them and the heat demand Functional relationship The controller is based on functions. ,function and functions Establish the initial heat dissipation model equations .
[0039] Specifically, in some embodiments, the compressor consumes energy during operation, and a portion of this energy is converted into heat. Therefore, the compressor's operating power... The larger the compressor, the more heat it dissipates. (Compressor operating power) and heat dissipation requirements They are usually positively correlated. Let ,in, Operating power Heat dissipation requirements The influence coefficient. It represents the functional relationship between instantaneous operating power and heat dissipation demand.
[0040] Specifically, in some embodiments, as the compressor's cumulative operating time increases... The more the compressor accumulates heat, the greater the demand for heat dissipation. The larger the value, the longer the compressor's cumulative operating time. and heat dissipation requirements They are usually positively correlated. Let ,in, Cumulative working hours Heat dissipation requirements The influence coefficient. This represents the functional relationship between cumulative working time and heat dissipation demand. Specifically, in some embodiments, ;in, Operating power With cumulative working hours The mutual coupling effect on heat dissipation demand The influence coefficient. The physical meaning of this is the change in heat dissipation demand caused by the temperature rise coupling of the compressor. Temperature rise coupling refers to the multi-field coupling phenomenon formed during the operation of the compressor, where the temperature fields generated by different heat sources interact with each component / medium through heat conduction, heat convection, or heat radiation.
[0041] Controller based on function ,function and functions The initial heat dissipation model equations are established, and their mathematical expressions are as follows: Formula (2) in, For heat dissipation requirements; This refers to the compressor's operating power. This represents the cumulative operating time of the compressor. Used to represent and The mutual coupling effect; Operating power Heat dissipation requirements The influence coefficient needs to be calibrated; Cumulative working hours Heat dissipation requirements The influence coefficient needs to be calibrated; Operating power With cumulative working hours The mutual coupling effect on heat dissipation demand The influence coefficient needs to be calibrated.
[0042] In some embodiments, the model parameters in formula (2) , and The calibration method is as follows: The controller acquires several sets of different first actual data collected during the operation of the vehicle refrigerator. Each set of first actual data includes operating power, cumulative operating time, and heat dissipation demand; for example, the first set of first actual data in the several sets of first actual data is... , and The first actual data in Group 2 is , and The third and first actual data group is , and ...The controller fits several different sets of initial actual data and the initial heat dissipation model equations using regression analysis methods (such as least squares) to obtain the model parameters of the heat dissipation model equations. , and The values are respectively , and The controller will , and Substituting into formula (2), we get formula (1), which is the heat dissipation model equation.
[0043] Step S23, Controller Calculate the current noise level of the cooling fan based on the current heat dissipation demand.
[0044] In some embodiments, the current noise level of the cooling fan With the current heat dissipation requirements of the compressor It has a first power function relationship; step S23 specifically includes: based on Calculation of the relationship with the first power function The corresponding current noise level .
[0045] Specifically, in some implementations, the mathematical expression for the first power function relationship is as follows: Formula (3) in, Noise level used to indicate the noise level of a cooling fan; Used to indicate the heat dissipation requirements of the compressor; , , and All are constants.
[0046] For example, the controller can Substituting into formula (3) to calculate Formula (3) takes into account the relationship between the heat dissipation demand of the compressor and the noise index of the cooling fan, so that the cooling fan can still effectively dissipate heat while ensuring that the cooling fan has low noise.
[0047] Step S24: The controller calculates the first theoretical speed based on the current noise index. The first theoretical speed is used to represent the speed of the cooling fan corresponding to the current noise index.
[0048] In some embodiments, the current noise level of the cooling fan There is a second power function relationship between the speed of the cooling fan and the speed of the cooling fan; step S24 specifically includes: based on The first theoretical rotational speed is calculated using the relationship between the second power function and the second power function; the mathematical expression for the second power function relationship is as follows: Formula (4) in, The noise level of the cooling fan is used to indicate its noise level. Used to indicate the speed of a cooling fan and It is a constant.
[0049] Specifically, the controller can calculate the current noise level of the cooling fan in step 23. Substitute into formula (4) to calculate the first theoretical speed. .
[0050] Current noise level of the cooling fan The second power function relationship between the fan speed and the cooling fan speed allows for the determination of a cooling fan speed range that can further reduce the noise of the cooling fan while ensuring that the cooling fan speed meets the heat dissipation requirements.
[0051] Step S25: The controller controls the rotation of the cooling fan based on the first theoretical speed.
[0052] In the embodiments of this application, the controller can adjust the speed of the cooling fan based on the monitored current operating power of the compressor and the corresponding heat dissipation demand. By controlling the change in the cooling fan speed, the noise output of the cooling fan can be dynamically adjusted according to different operating power levels. When the compressor's operating power decreases, the cooling fan speed decreases, thereby reducing the noise of the cooling fan; when the compressor's operating power increases, the fan speed increases to improve the cooling effect of the cooling fan on the compressor.
[0053] In some embodiments, step S25 specifically includes: the controller based on Calculate the second theoretical speed, which is used to represent The corresponding cooling fan speed; if the controller determines that the second theoretical speed is less than the first theoretical speed, the controller controls the cooling fan to rotate based on the first theoretical speed; if the controller determines that the second theoretical speed is not less than the first theoretical speed, the controller controls the cooling fan to rotate based on the second theoretical speed. In this embodiment, to ensure the compressor operates normally, the cooling fan speed prioritizes meeting the compressor's heat dissipation needs.
[0054] Specifically, in some embodiments, there is a linear relationship between the compressor's current heat dissipation demand and the speed of the cooling fan; based on Calculating the second theoretical rotational speed specifically includes: based on The second theoretical rotational speed is calculated using the linear correspondence described above; the mathematical expression for the linear correspondence is as follows: Formula (5) in, Used to represent the Used to indicate the heat dissipation requirement of the compressor; and It is a constant.
[0055] For example, the controller can calculate the value in step S22. Substituting into formula (5), the second theoretical speed is calculated. .
[0056] Specifically, in some embodiments, the controller can establish an initial linear relationship between the compressor's current heat dissipation demand and the speed of the cooling fan, and the mathematical expression for the initial linear relationship is as follows: Formula (6) in, Used to indicate heat dissipation Used to indicate the heat dissipation requirements of the compressor; It is the linear proportionality coefficient between heat dissipation demand and cooling fan speed, used to characterize the positive correlation between heat dissipation demand and fan speed; This is a bias coefficient directly relating the heat dissipation demand to the cooling fan speed, used to characterize the initial bias relationship between the heat dissipation demand and the fan speed. and The unknowns are to be calibrated.
[0057] In some embodiments, the controller can establish the current noise level of the cooling fan. The initial second power function relationship between the cooling fan speed and the fan speed is expressed mathematically as follows: Formula (7) in, Used to indicate the noise level of a cooling fan. The unit can be dB; Used to indicate the rotational speed of a cooling fan. This is the noise model index for the cooling fan. and The unknowns are to be calibrated.
[0058] By combining formulas (6) and (7) with the controller, the current noise level of the cooling fan can be obtained. With respect to the current heat dissipation requirements of the compressor The initial first power function relationship between them is as follows: Formula (8) in, Noise level used to indicate the noise level of a cooling fan; Used to indicate the heat dissipation requirements of the compressor; , , and All of these are unknowns to be calibrated.
[0059] In some embodiments, the model parameters in formulas (6), (7), and (8) , , and The calibration method is as follows: The controller acquires several sets of different second actual data collected when the vehicle refrigerator is working. Each set of second actual data includes the heat dissipation demand. and heat dissipation requirements The corresponding cooling fan speed and noise index For example, as shown in Table 1, the first group of second actual data in several groups is... , and The second actual data in group 2 is , and The second actual data in group 3 is , and ...The second actual data in group m is , and ...; where m is a positive integer. The controller calculates the heat dissipation demand from each set of second actual data based on a preset fitting method (such as polynomial method or least squares method). and the speed of the cooling fan Fitting the result with formula (6) yields... and The values are respectively and Then and Substituting into formula (6), we obtain formula (5). The controller uses the least squares method, etc., to calculate the heat dissipation demand in each group of second actual data. Noise level of cooling fan Fitting the result with formula (7) yields... and The values are respectively and Then and Substituting into formula (7), we obtain formula (4). The controller will... and The value of and ,as well as, and The value of and Substituting into formula (8), we get formula (3).
[0060] In some embodiments, the polynomial method fits the data using a polynomial function (e.g., a first-, second-, or higher-order polynomial) to find the most suitable polynomial function based on the distribution of the data points, making the fitted curve as close as possible to the data points. The goal of the least squares method is to minimize the sum of squared errors between the fitted curve and the data points, and it can be used to fit any form of function (linear or nonlinear), not limited to polynomial fitting.
[0061] In some embodiments, heat dissipation requirements The speed of the cooling fan is a dimensionless number. The unit can be revolutions per minute (RPM), noise level The unit can be decibel (dB).
[0062] Table 1:
[0063] In the embodiments of this application, the controller can adjust the speed of the cooling fan according to the current operating power of the compressor, which helps to reduce the noise of the cooling fan when the compressor is running at a lower operating power, thus improving the user's comfort when using the car refrigerator. Dynamic adjustment of the cooling fan speed not only reduces unnecessary noise but also prevents the cooling fan from over-operating while ensuring its heat dissipation effect, thereby improving the energy efficiency of the car refrigerator. Simultaneously, the controller can automatically adjust the cooling fan speed according to different operating conditions of the car refrigerator (such as ambient temperature or refrigerator load), maintaining a good balance between heat dissipation and noise, providing effective heat dissipation without generating excessive noise. Furthermore, adjusting the cooling fan speed can prevent over-operation and overload of the cooling fan, extending the service life of the car refrigerator compressor and fan, and reducing the maintenance costs of the car refrigerator.
[0064] Indicatively, Figure 4 A hardware structure diagram of a controller used to implement a noise control method for a cooling fan is shown. (For example...) Figure 4 As shown, the controller 700 includes: One or more processors 710 and memory 720, Figure 4 Take the 710 processor as an example.
[0065] The processor 710 and memory 720 can be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.
[0066] The memory 720, 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 methods in the embodiments of this application. The processor 710 executes various functional applications and data processing of the aerosol generating device by running the non-volatile software programs, instructions, and modules stored in the memory 720, thereby implementing the methods of the above-described method embodiments.
[0067] The memory 720 may include a program storage area and a data storage area, wherein 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 aerosol generating device, etc. Furthermore, the memory 720 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 720 may optionally include memory remotely located relative to the processor 710. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
[0068] The one or more modules are stored in the memory 720. When executed by the one or more processors 710, they perform the methods in any of the above method embodiments, for example, the methods described above. Figure 3 The method steps S21-S25 are described in the text.
[0069] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.
[0070] This application provides a non-volatile computer-readable storage medium storing computer-executable instructions that are executed by one or more processors, for example... Figure 4 One of the processors 710 can cause the one or more processors to perform the methods in any of the above method embodiments, for example, to perform the methods described above. Figure 3 The method steps S21-S25 are described in the text.
[0071] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software and a general-purpose hardware platform, or of course, using hardware. Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.
[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for controlling the noise of a cooling fan, characterized in that, The cooling fan is used to dissipate heat from the compressor of the vehicle refrigerator, and the method includes: Monitor the current operating power and current cumulative operating time of the compressor; Calculate the current heat dissipation requirement of the compressor based on the current operating power and the current cumulative operating time. Calculate the current noise level of the cooling fan based on the current heat dissipation demand. A first theoretical rotational speed is calculated based on the current noise level, whereby the first theoretical rotational speed represents the rotational speed of the cooling fan corresponding to the current noise level; and, The cooling fan is controlled to rotate based on the first theoretical rotational speed.
2. The method according to claim 1, characterized in that, The current heat dissipation requirement of the compressor is calculated based on the current operating power and the current cumulative operating time, including: Determine the heat dissipation model equations; Substituting the current operating power and the current cumulative operating time into the heat dissipation model equation, we obtain the current heat dissipation requirement of the compressor; The heat dissipation model equation reflects the relationship between the heat dissipation demand of the compressor and the operating power and cumulative operating time of the compressor, respectively. The heat dissipation model equation also reflects the relationship between the heat dissipation demand of the compressor and the coupling result, which is the mutual coupling effect of the operating power and the cumulative operating time.
3. The method according to claim 2, characterized in that, The product of the compressor's operating power and the compressor's cumulative operating time is used to represent the mutual coupling effect between the operating power and the cumulative operating time; The mathematical expression of the heat dissipation model equation is as follows: in, Used to indicate the heat dissipation requirement of the compressor; Used to indicate the operating power of the compressor; Used to indicate the cumulative operating time of the compressor; , and All are constants.
4. The method according to claim 1, characterized in that, The current noise level of the cooling fan and the current heat dissipation demand of the compressor have a first power function relationship; The calculation of the current noise level of the cooling fan based on the current heat dissipation demand includes: The current noise index corresponding to the current heat dissipation demand is calculated based on the current heat dissipation demand and the first power function relationship.
5. The method according to claim 4, characterized in that, The mathematical expression for the first power function relationship is as follows: in, The noise level of the cooling fan is used to indicate its noise level. Used to indicate the heat dissipation requirement of the compressor; , , and All are constants.
6. The method according to claim 1, characterized in that, The current noise level of the cooling fan has a second power function relationship with the speed of the cooling fan; The calculation of the first theoretical rotational speed based on the current noise index includes: The first theoretical rotational speed is calculated based on the current noise index and the second power function relationship; The mathematical expression for the second power function relationship is as follows: in, The noise level of the cooling fan is used to indicate its noise level. Used to represent the and It is a constant.
7. The method according to any one of claims 1-6, characterized in that, The step of controlling the rotation of the cooling fan based on the first theoretical rotation speed includes: The second theoretical speed is calculated based on the current operating power, and the second theoretical speed is used to represent the speed of the cooling fan corresponding to the current operating power; If it is determined that the second theoretical speed is less than the first theoretical speed, then the cooling fan is controlled to rotate based on the first theoretical speed; If it is determined that the second theoretical speed is not less than the first theoretical speed, then the cooling fan is controlled to rotate based on the second theoretical speed.
8. The method according to claim 7, characterized in that, There is a linear relationship between the current heat dissipation demand of the compressor and the rotational speed of the cooling fan; The calculation of the second theoretical rotational speed based on the current operating power includes: Calculate the second theoretical rotational speed based on the current operating power and the linear correspondence; The mathematical expression for the linear correspondence is as follows: in, Used to indicate the rotational speed of the cooling fan; Used to indicate the heat dissipation requirement of the compressor; and It is a constant.
9. A controller, characterized in that, The controller includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the method according to any one of claims 1-8.
10. A vehicle-mounted refrigerator, characterized in that, The vehicle-mounted refrigerator includes the controller as described in claim 9.
11. A non-volatile computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when executed, enable the execution of the method according to any one of claims 1-8.