Air fryer noise reduction control method and device, storage medium and electronic equipment

Abstract

The application discloses an air fryer noise reduction control method and device, a storage medium and an electronic device, and relates to the technical field of noise control. The method comprises the following steps: obtaining a target cooking mode of an air fryer; determining a target cooking rotating speed of a direct current motor of the air fryer according to the target cooking mode; if the target cooking rotating speed is greater than the minimum rotating speed of the direct current motor during slow starting, controlling the direct current motor to start slowly so as to gradually reach the target cooking rotating speed. The application can control the noise of the air fryer, thereby improving the user experience, and can also improve the cooking efficiency.

Description

Technical Field

[0001] This application relates to the field of noise control technology, and in particular to a noise reduction control method, device, storage medium and electronic equipment for an air fryer. Background Technology

[0002] Air fryers are among the most popular kitchen appliances in recent years. Their basic working principle is to use high-speed circulating hot air to heat food so that it becomes crispy on the outside and tender on the inside, while giving the food a texture and color similar to fried food.

[0003] Currently, air fryers typically use shaded-pole motors. However, shaded-pole motors only have fixed speed settings and will directly reach the target speed after startup. When the target speed is too high, the noise of the shaded-pole motor will be louder after startup, creating a stark contrast with when cooking is not in progress, thus affecting the user experience. In addition, since the temperature of the air fryer is low when it is first started, the high speed of the shaded-pole motor will cause it to lose heat relatively quickly, thus affecting cooking efficiency. Summary of the Invention

[0004] In view of this, this application provides a method, device, storage medium and electronic device for noise control of an air fryer, which can control the noise of the air fryer, thereby improving the user experience and also improving cooking efficiency.

[0005] According to a first aspect of this application, a noise reduction control method for an air fryer is provided, the air fryer including a DC motor, the method comprising:

[0006] Obtain the target cooking mode for the air fryer;

[0007] The target cooking speed of the DC motor of the air fryer is determined according to the target cooking mode.

[0008] If the target cooking speed is greater than the minimum speed of the DC motor during soft start, then the DC motor is controlled to start softly to gradually reach the target cooking speed.

[0009] According to a second aspect of this application, an air fryer noise reduction control device is provided, the device comprising:

[0010] The acquisition unit is used to acquire the target cooking mode of the air fryer;

[0011] A determining unit is configured to determine the target cooking speed of the DC motor of the air fryer based on the target cooking mode.

[0012] The control unit is configured to control the DC motor to start slowly if the target cooking speed is greater than the minimum speed when the DC motor starts slowly, so as to gradually reach the target cooking speed.

[0013] According to a third aspect of this application, a storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described air fryer noise reduction control method.

[0014] According to a fourth aspect of this application, an air fryer is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor executes the program to implement the above-described air fryer noise reduction control method.

[0015] By employing the above technical solutions, the present invention provides an air fryer noise reduction control method, device, storage medium, and electronic device. Compared with the prior art, it can determine the target cooking speed of the DC motor of the air fryer according to the target cooking mode. If the target cooking speed is greater than the minimum speed of the DC motor during slow start-up, the DC motor is controlled to start slowly to gradually reach the target cooking speed. Therefore, by using a DC motor, the present invention can control the motor speed to increase slowly when the air fryer starts cooking, so that the motor noise gradually increases, giving the user a gradual adaptation process, thereby improving the user experience. Furthermore, for higher target cooking speeds, the present invention, by controlling the motor speed to increase slowly when the air fryer starts, can reduce heat loss during the heating process, thereby improving cooking efficiency.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A flowchart illustrating a noise reduction control method for an air fryer is shown.

[0019] Figure 2 A schematic diagram showing the relationship between motor speed and duty cycle is shown.

[0020] Figure 3 A flowchart illustrating the DC motor soft-start control method is shown.

[0021] Figure 4 This diagram illustrates the overall process of noise reduction control in an air fryer.

[0022] Figure 5 A schematic diagram of the control flow for the heating element and fan is shown;

[0023] Figure 6 A schematic diagram of a noise reduction control device for an air fryer is shown. Detailed Implementation

[0024] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0025] Shaded-pole motors only have fixed speed settings. Once started, they will directly reach the target speed. When the target speed is too high, the noise of the shaded-pole motor after starting will be loud, which is in stark contrast to when cooking is not started, thus affecting the user experience. In addition, since the temperature of the air fryer is low when it is first started, the high speed of the shaded-pole motor will cause it to lose heat relatively quickly, thus affecting the cooking efficiency.

[0026] To address the aforementioned problems, this invention provides a noise reduction control method for an air fryer, wherein the air fryer includes a DC motor, such as... Figure 1 As shown, the method includes:

[0027] Step 10: Obtain the target cooking mode for the air fryer.

[0028] The target cooking mode can be any one of multiple cooking modes, including dried fruit mode, air fry mode, fermentation mode, etc. It should be noted that the cooking mode in this embodiment of the invention can also be other cooking modes, and is not limited to the above-listed modes.

[0029] In this embodiment of the invention, the user can select any cooking mode, i.e. the target cooking mode, through the display screen or buttons of the air fryer, and the control unit of the air fryer can then obtain the target cooking mode selected by the user.

[0030] Step 20: Determine the target cooking speed of the DC motor of the air fryer according to the target cooking mode.

[0031] The DC motor operates at different speeds in different cooking modes.

[0032] In this embodiment of the invention, the appropriate speed of the DC motor in different cooking modes can be preset according to the cooking characteristics of different cooking modes, thereby generating a preset cooking mode list. This preset cooking mode list records the cooking speed of the DC motor in different cooking modes, thereby improving the cooking effect of the corresponding food. After obtaining the target cooking mode selected by the user, the preset cooking mode list can be queried, and the target cooking speed of the DC motor in the target cooking mode can be determined according to the target cooking mode, so as to control the operation of the DC motor based on the target cooking speed.

[0033] The DC motor in this embodiment of the invention can be controlled using a duty cycle PWM. By having the device output different duty cycles PWM, the motor can be controlled to achieve different speeds. Figure 2 The relationship between the speed of a DC motor and its duty cycle PWM is shown. When the duty cycle is 5%, the speed of the DC motor is 500 rpm, and when the duty cycle is 98%, the speed of the DC motor is 3600 rpm. The speed of the DC motor gradually increases with the increase of the duty cycle, and there is a linear correlation between the duty cycle and the speed of the DC motor.

[0034] It should be noted that, in addition to using duty cycle to control the speed of DC motor, the present invention can also use other methods to control the speed of DC motor, such as voltage, current, etc. The embodiments of the present invention do not specifically limit the control method of DC motor speed.

[0035] Step 30: If the target cooking speed is greater than the minimum speed of the DC motor during soft start, then control the DC motor to start softly to gradually reach the target cooking speed.

[0036] The slow start refers to the process by which the DC motor gradually reaches the target cooking speed from its initial speed. The minimum speed for the DC motor during slow start can be set according to actual business needs, and this embodiment of the invention does not impose a specific limitation on this.

[0037] To avoid excessive noise from the DC motor during startup, this embodiment of the invention first determines whether the air fryer's DC motor needs a slow start based on the target cooking speed. Specifically, it determines whether the target cooking speed is greater than the minimum speed required for the DC motor's slow start. If the target cooking speed is greater than the minimum speed required for the DC motor's slow start, it indicates that the target cooking speed is too high. In this case, directly controlling the DC motor speed to reach the target cooking speed would result in excessive noise. Therefore, it is necessary to control the DC motor to perform a slow start during the cooking process to gradually reach the target cooking speed. Conversely, if the target cooking speed is less than or equal to the minimum speed required for the DC motor's slow start, it indicates that the target cooking speed is not high. The DC motor does not need to perform a slow start during the cooking process, and can directly output the duty cycle corresponding to the target cooking speed to control the DC motor to reach the target cooking speed. Since the DC motor speed is not high, it will not generate excessive noise.

[0038] Based on the target cooking speed, this invention determines whether the DC motor needs to start slowly during the cooking process. This not only avoids excessive noise caused by the DC motor running at too high a speed, but also allows the DC motor to reach the target cooking speed directly when its speed is low, thereby improving the cooking efficiency of the air fryer.

[0039] For example, the minimum speed for a DC motor to start slowly is 1500 rpm. When the target cooking speed is 2200 rpm, since it is greater than 1500 rpm, it is determined that the DC motor needs to start slowly during this cooking process. When the target cooking speed is 1000 rpm, since it is less than 1500 rpm, it is determined that the DC motor does not need to start slowly during this cooking process, and the sound of starting the DC motor directly is very small.

[0040] Furthermore, after determining that the DC motor needs a slow start, the DC motor is gradually controlled to reach the target cooking speed. For this process, such as... Figure 3 As shown, it includes:

[0041] Step 31: Determine the duty cycle corresponding to the lowest speed during the DC motor's soft start as the duty cycle corresponding to the initial speed, and calculate the difference between the duty cycle corresponding to the target cooking speed and the duty cycle corresponding to the initial speed.

[0042] In this embodiment of the invention, after determining that the DC motor needs to perform a soft start, the duty cycle corresponding to the lowest speed is determined as the duty cycle corresponding to the initial speed, and the difference pwm3 between the duty cycle pwm2 corresponding to the target cooking speed and the duty cycle pwm1 corresponding to the initial speed is calculated, that is:

[0043] pwm3 = pwm2 - pwm1

[0044] Step 32: Based on the difference, control the DC motor to start slowly in order to gradually reach the target cooking speed.

[0045] In this embodiment of the invention, after calculating the difference value pwm3, the difference value pwm3 is evenly distributed over the soft start period T to gradually control the speed of the DC motor to reach the target cooking speed. For this process, the method includes: calculating the average increment of the duty cycle within the soft start period based on the difference value and the soft start period; calculating the average increment of the duty cycle within the soft start period based on the difference value and the soft start period; using the duty cycle corresponding to the initial speed as the current output duty cycle to control the DC motor to reach the initial speed; determining whether the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed; if the current output duty cycle is not equal to the duty cycle corresponding to the target cooking speed, increasing the current output duty cycle according to the average increment of the duty cycle, repeating the determination and increase process of the current duty cycle until the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed.

[0046] The soft start cycle is the time it takes for the DC motor to reach the target cooking speed from its initial speed. It can be set according to actual business needs, and this embodiment of the invention does not impose any specific limitations on it.

[0047] Specifically, the calculated difference pwm3 is divided by the soft start period T to obtain the average duty cycle increment Δpwm within the soft start period. The specific formula is as follows:

[0048] Δpwm=pwm3 / T

[0049] The duty cycle pwm1 corresponding to the initial speed is then used as the current output duty cycle pwm4 to bring the DC motor to the initial speed. Next, based on the current output duty cycle pwm4 and the duty cycle pwm2 corresponding to the target cooking speed, it is determined whether the current output duty cycle pwm4 is equal to the duty cycle pwm2 corresponding to the target cooking speed. If the current output duty cycle is not equal to the duty cycle corresponding to the target cooking speed, the current output duty cycle is increased by the average duty cycle increment Δpwm.

[0050] like Figure 4 As shown, based on the current output duty cycle, the duty cycle of the DC motor is increased by an average duty cycle increment Δpwm per second until the current output duty cycle reaches the duty cycle pwm2 corresponding to the target cooking speed, so that the DC motor can reach the target cooking speed. After reaching the target cooking speed, the DC motor maintains a stable speed during this cooking process.

[0051] For example, if the target cooking speed is 3000 rpm, the corresponding duty cycle pwm2 is 70%, while the minimum speed for slow start is 2200 rpm, and the corresponding duty cycle is 40%. Since the duty cycle corresponding to the target speed is greater than the duty cycle corresponding to the minimum speed for slow start, a slow start is required for this cooking operation. The duty cycle corresponding to the minimum speed for slow start is then determined as the duty cycle corresponding to the initial speed, and the difference pwm3 between the duty cycle pwm2 corresponding to the target cooking speed and the duty cycle pwm1 corresponding to the initial speed is calculated: pwm3 = 70% - 40% = 30%. This difference pwm3 is then evenly distributed over the slow start period T to obtain the average duty cycle increment Δpwm. Assuming the slow start period T is 10 seconds, then Δpwm = 30% / 10 = 3%. Furthermore, during the slow start cycle, the duty cycle of the DC motor is increased by Δpwm per second, that is, starting from the duty cycle corresponding to the initial speed, it is increased by 3% per second until the duty cycle pwm2 (70%) corresponding to the target cooking speed is reached, and the target cooking speed is maintained.

[0052] Therefore, by employing a DC motor, this embodiment of the invention can control the motor speed to increase slowly when the air fryer is first started cooking, thus gradually increasing the motor noise and allowing the user a gradual adaptation process, thereby improving the user experience. Furthermore, for higher target cooking speeds, by controlling the motor speed to increase slowly when the air fryer is started, this embodiment of the invention can reduce heat loss during the heating process, thereby improving cooking efficiency.

[0053] In some embodiments, the operation of the heating element and fan can also be controlled during the cooking process, for example... Figure 5 As shown, it includes:

[0054] Step 40: Obtain the target temperature of the air fryer.

[0055] The target temperature is the cooking temperature set by the user based on the ingredients.

[0056] In this embodiment of the invention, the user can directly set the cooking temperature of the food, i.e., the target temperature, via the air fryer's display screen or buttons. The air fryer's control unit can then obtain the target temperature set by the user.

[0057] Step 50: Query the preset temperature and control parameter mapping table, and determine the target control parameters of the air fryer based on the target temperature.

[0058] The preset temperature and control parameter mapping table records the mapping relationship between different temperature ranges and control parameters. The control parameters include the operating time required for the heating element and fan at different temperature ranges. It should be noted that the control parameters may also include other control parameters, and are not limited to the operating time required for the heating element and fan respectively.

[0059] In this embodiment of the invention, since the control parameters of different devices vary significantly, it is necessary to pre-calibrate the control parameters for different temperature ranges for the air fryer, thereby constructing a preset temperature-control parameter mapping table. When determining the target control parameters, first determine the temperature range to which the target temperature belongs from different temperature ranges, then consult the preset temperature-control parameter mapping table, and determine the working time required for the heating element and fan to reach the target temperature based on the temperature range to which the target temperature belongs.

[0060] For example, in the preset temperature and control parameter mapping table, the working time required for the heating element and fan to reach a temperature of 100 degrees to 110 degrees is a and b, respectively; the working time required for the heating element and fan to reach a temperature of 110 degrees to 120 degrees is c and d, respectively; the working time required for the heating element and fan to reach a temperature of 120 degrees to 130 degrees is e and f, respectively; and the target temperature is 115 degrees. Therefore, the temperature range can be determined to be 110-120 degrees, and the working time required for the heating element and fan to reach 115 degrees is c and d, respectively.

[0061] Step 60: According to the target control parameters, control the heating element and fan of the air fryer to work during this cooking process, and adjust the heating power of the heating element and the fan speed according to the cooking progress so that the heating element and the fan work together.

[0062] The cooking process includes a preheating stage, a constant temperature stage, and a crisping stage, and the slow start process of the DC motor belongs to the preheating stage.

[0063] In this embodiment of the invention, during the preheating stage, the DC motor is controlled to start slowly to drive the fan speed to increase gradually, reducing heat loss in the air fryer during the preheating stage, while the heating element heats at full power. During the constant temperature stage, the real-time temperature of the air fryer is compared with the target temperature to adjust the duty cycle of the heating element and control the fan to operate at a speed matching the target cooking mode. The real-time temperature can be measured by an NTC component, and the fan speed varies in different cooking modes. During the crisping stage, when the preset crisping temperature of the food is reached, the heating element is turned off, and the fan is controlled to maintain operation at that speed. That is, after cooking, the heating element is turned off, and the fan is kept running at high speed to use residual heat to evaporate the moisture from the food. When the preset crisping temperature is reached, the food enters the warming stage. Different foods have different crisping temperatures, and users can select the crisping temperature for their specific food.

[0064] This invention improves cooking results by controlling the heating element and fan to work in tandem. Furthermore, by setting appropriate heating power and fan speed according to different cooking stages and ingredient characteristics, this invention can further enhance cooking performance and meet users' personalized needs.

[0065] This invention provides a noise reduction control method for an air fryer. By employing a DC motor, the motor speed is gradually increased when the air fryer is first started cooking, causing the motor noise to increase slowly, giving the user a gradual adaptation process and thus improving the user experience. Furthermore, for higher target cooking speeds, this invention reduces heat loss during the heating process by gradually increasing the motor speed when the air fryer is started, thereby improving cooking efficiency.

[0066] Furthermore, as Figure 1 , Figure 3 and Figure 5 The specific implementation of the method shown in this embodiment provides an air fryer noise reduction control device, such as... Figure 6 As shown, the device includes: an acquisition unit 101, a determination unit 102, and a control unit 103.

[0067] The acquisition unit 101 can be used to acquire the target cooking mode of the air fryer.

[0068] The determining unit 102 can be used to determine the target cooking speed of the DC motor of the air fryer according to the target cooking mode.

[0069] The control element 103 can be used to control the DC motor to start slowly if the target cooking speed is greater than the minimum speed when the DC motor starts slowly, so as to gradually reach the target cooking speed.

[0070] In some embodiments, the determining unit 102 may be specifically used to query a preset cooking mode list and determine the target cooking speed of the DC motor according to the target cooking mode, wherein the preset cooking mode list records the cooking speed of the DC motor in different cooking modes.

[0071] In some embodiments, the control unit 103 can also be used to determine that the DC motor does not need to perform a slow start during the current cooking process if the target cooking speed is less than or equal to the minimum speed when the DC motor is starting softly; and directly output the duty cycle corresponding to the target cooking speed to control the DC motor to reach the target cooking speed.

[0072] In some embodiments, the control unit 103 includes a computing module and a control module.

[0073] The calculation module can be used to determine the duty cycle corresponding to the lowest speed during the soft start of the DC motor as the duty cycle corresponding to the initial speed, and to calculate the difference between the duty cycle corresponding to the target cooking speed and the duty cycle corresponding to the initial speed.

[0074] The control module can be used to control the DC motor to start slowly based on the difference, so as to gradually reach the target cooking speed.

[0075] In some embodiments, the control module may be specifically configured to calculate the average duty cycle increment within the soft start cycle based on the difference and the soft start cycle; use the duty cycle corresponding to the initial speed as the current output duty cycle to control the DC motor to reach the initial speed; determine whether the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed; if the current output duty cycle is not equal to the duty cycle corresponding to the target cooking speed, increase the current output duty cycle according to the average duty cycle increment, and repeat the determination and increase process of the current duty cycle until the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed.

[0076] In some embodiments, the acquisition unit 101 can also be used to acquire the target temperature of the air fryer.

[0077] The determining unit 102 can also be used to query a preset temperature and control parameter mapping table and determine the target control parameters of the air fryer based on the target temperature.

[0078] The control unit 103 can also be used to control the heating element and fan of the air fryer to work during the cooking process according to the target control parameters, and adjust the heating power of the heating element and the fan speed according to the cooking process so that the heating element and the fan work together.

[0079] In some embodiments, the determining unit 102 can also be used to determine the temperature range to which the target temperature belongs from the different temperature ranges.

[0080] The determining unit 102 can also be used to query the preset temperature and control parameter mapping table, and determine the working time required for the heating tube and fan to reach the target temperature according to the temperature range to which the target temperature belongs.

[0081] In some embodiments, the cooking process includes a preheating stage, a constant temperature stage, and a crisping stage. The control unit 103 can also be specifically configured to: during the preheating stage, control the DC motor to start slowly, thereby gradually increasing the fan speed and reducing heat loss in the air fryer during the preheating stage; during the constant temperature stage, compare the real-time temperature of the air fryer with the target temperature to adjust the duty cycle of the heating element and control the fan to operate at a speed setting matching the target cooking mode; during the crisping stage, when the preset crisping temperature of the food is reached, turn off the heating element and control the fan to maintain operation at the specified speed setting.

[0082] It should be noted that other corresponding descriptions of the functional units involved in the air fryer noise reduction control device provided in this embodiment of the invention can be found in the following references. Figure 1 , Figure 3 and Figure 5 The corresponding description in [the document] will not be repeated here.

[0083] Based on the above, Figure 1 , Figure 3 and Figure 5 Accordingly, this embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the above-described method. Figure 1 , Figure 3 and Figure 5 The noise reduction control method for air fryers is shown.

[0084] Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause an electronic device (such as a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0085] Based on the above, Figure 1 , Figure 3 and Figure 5 The method shown, and Figure 6To achieve the above objectives, this application also provides an air fryer, which can be a personal computer, tablet computer, server, or other network device. The device includes a storage medium and a processor; the storage medium stores a computer program; the processor executes the computer program to achieve the above-described objectives. Figure 1 , Figure 3 and Figure 5 The noise reduction control method for air fryers is shown.

[0086] Optionally, the aforementioned physical devices may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, input units such as a keyboard, etc., and optional user interfaces may also include USB interfaces, card reader interfaces, etc. The network interface may optionally include standard wired interfaces, wireless interfaces (such as Wi-Fi interfaces), etc.

[0087] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0088] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the aforementioned physical device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0089] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware.

[0090] This invention employs a DC motor, which allows the motor speed to increase slowly when the air fryer is first started cooking. This gradual increase in motor noise provides the user with an adaptation period, thus improving the user experience. Furthermore, for higher target cooking speeds, this invention reduces heat loss during the heating process by controlling the motor speed to increase gradually when the air fryer is started, thereby improving cooking efficiency.

[0091] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0092] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A noise reduction control method for an air fryer, characterized in that, The air fryer includes a DC motor, and the method includes: Obtain the target cooking mode for the air fryer; The target cooking speed of the DC motor of the air fryer is determined according to the target cooking mode. If the target cooking speed is greater than the minimum speed of the DC motor during soft start, then the DC motor is controlled to start softly to gradually reach the target cooking speed.

2. The method according to claim 1, characterized in that, Determining the target cooking speed of the DC motor of the air fryer according to the target cooking mode includes: The preset cooking mode list is queried, and the target cooking speed of the DC motor is determined according to the target cooking mode. The preset cooking mode list records the cooking speed of the DC motor in different cooking modes.

3. The method according to claim 1, characterized in that, The method further includes: If the target cooking speed is less than or equal to the minimum speed of the DC motor during soft start, then it is determined that the DC motor does not need to perform soft start during this cooking process. The duty cycle corresponding to the target cooking speed is directly output to control the DC motor to reach the target cooking speed.

4. The method according to claim 1, characterized in that, The method of controlling the DC motor to perform a slow start to gradually reach the target cooking speed includes: The duty cycle corresponding to the lowest speed during the DC motor's soft start is determined as the duty cycle corresponding to the initial speed, and the difference between the duty cycle corresponding to the target cooking speed and the duty cycle corresponding to the initial speed is calculated. Based on the difference, the DC motor is controlled to start slowly in order to gradually reach the target cooking speed.

5. The method according to claim 4, characterized in that, The step of controlling the DC motor to perform a soft start based on the difference, so as to gradually reach the target cooking speed, includes: Based on the difference and the soft start period, calculate the average duty cycle increment within the soft start period; The duty cycle corresponding to the initial speed is used as the current output duty cycle to control the DC motor to reach the initial speed; Determine whether the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed; If the current output duty cycle is not equal to the duty cycle corresponding to the target cooking speed, then the current output duty cycle is increased according to the average increment of the duty cycle, and the determination and increase process of the current duty cycle is repeated until the current output duty cycle is equal to the duty cycle corresponding to the target cooking speed.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Obtain the target temperature of the air fryer; Query the preset temperature and control parameter mapping table, and determine the target control parameters of the air fryer based on the target temperature; According to the target control parameters, the heating element and fan of the air fryer are controlled to work during the cooking process, and the heating power of the heating element and the fan speed are adjusted according to the cooking progress so that the heating element and the fan work together.

7. The method according to claim 6, characterized in that, The target control parameters include: the operating time required for the heating element and the fan to reach the target temperature, respectively; and the step of querying the preset temperature-control parameter mapping table and determining the target control parameters of the air fryer based on the target temperature, including: Determine the temperature range to which the target temperature belongs from different temperature ranges; Query the preset temperature and control parameter mapping table, and determine the working time required for the heating element and fan to reach the target temperature based on the temperature range to which the target temperature belongs.

8. The method according to claim 6, characterized in that, The cooking process includes a preheating stage, a constant temperature stage, and a crisping stage. Adjusting the heating power of the heating element and the fan speed according to the cooking process, so that the heating element and the fan work in coordination, includes: During the preheating phase, the DC motor is controlled to start slowly to drive the fan speed to increase gradually, thereby reducing the heat loss of the air fryer during the preheating phase. During the constant temperature stage, the real-time temperature of the air fryer is compared with the target temperature to adjust the duty cycle of the heating element and control the fan to operate at a speed that matches the target cooking mode. During the crisping stage, when the preset crisping temperature of the food is reached, the heating element is turned off, and the fan is controlled to operate at the specified speed.

9. A noise reduction control device for an air fryer, characterized in that, include: The acquisition unit is used to acquire the target cooking mode of the air fryer; A determining unit is configured to determine the target cooking speed of the DC motor of the air fryer based on the target cooking mode. The control unit is configured to control the DC motor to start slowly if the target cooking speed is greater than the minimum speed when the DC motor starts slowly, so as to gradually reach the target cooking speed.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 8.

11. An air fryer, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 8.

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