Fan blade detection method, control device, cooking utensil and readable storage medium

Abstract

The embodiment of the invention provides a fan blade detection method, a control device, a cooking utensil and a readable storage medium. According to the detection method, the state of the fan blades can be determined by detecting the detection parameters, specifically, after a coil panel in the heating device is powered on, the coil panel can generate a magnetic field and starts to resonate, when the state of the fan blades changes, the detection parameters of the heating device can correspondingly change, and at the moment, the detection parameters can be obtained, and the state of the fan blades can be determined.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a fan blade detection method, control device, cooking appliance, and readable storage medium. Background Technology

[0002] With the advancement of technology, home appliances have gradually entered people's lives, among which cooking utensils play an indispensable role.

[0003] Existing cooking appliances, such as air fryers, have fan blades that can create airflow circulation within the cooking chamber to assist in cooking food. When the fan blades act as a heat carrier, they can also heat the cooking chamber. During the use of cooking appliances, the fan blades are detachable and operate for extended periods of time, so there is a possibility that they may be forgotten to be installed or deformed over time. It is necessary to use detection methods to determine whether the fan blades are installed or severely deformed in order to prevent further damage to the cooking appliances. Summary of the Invention

[0004] This application provides a fan blade detection method, control device, cooking appliance, and readable storage medium to at least partially improve the above-mentioned problems.

[0005] In a first aspect, embodiments of this application provide a detection method applied to a cooking appliance, the cooking appliance including a cooking cavity, fan blades, and a heating device, the fan blades being used to form an airflow circulation within the cooking cavity, and the heating device including a heating coil for heating the fan blades; the method includes:

[0006] When a heating command is received, the system responds by energizing the heating coil; acquiring the detection parameters of the heating device; and confirming the status information of the fan blades based on the detection parameters.

[0007] In some implementations, obtaining the detection parameters of the heating device includes: confirming whether the heating device has reached a first preset power; if the actual output power of the heating device is greater than or equal to the first preset power, obtaining the detection parameters.

[0008] Based on the detection parameters, confirm the status information of the fan blades, including: confirming whether the detection parameters are within the preset range; if the detection parameters are not within the preset range, confirm that the fan blades are in an abnormal state.

[0009] In one embodiment, when it is confirmed that the fan blades are in an abnormal state, the method further includes: issuing a warning message and / or controlling the heating device to shut down.

[0010] In one embodiment, acquiring the detection parameters of the heating device further includes:

[0011] If the actual output power of the heating device does not reach the first preset power, check whether the current through the heating coil reaches the first threshold.

[0012] When the current through the heating coil reaches the first threshold, the heating coil is controlled to heat at a second preset power, which is less than the first preset power.

[0013] When the actual output power of the heating coil is greater than or equal to the second preset power, the detection parameters are obtained; and

[0014] When the current through the heating coil does not reach the first threshold, the detection parameters are obtained.

[0015] In one embodiment, the detection parameter is the resonant frequency of the heating coil; and / or, the heating device further includes an insulated gate bipolar transistor (IGBT), which is used to selectively control the heating coil to be energized or de-energized, and the detection parameter is the voltage of the control electrode of the IGBT.

[0016] In one embodiment, acquiring detection parameters of the heating device includes: acquiring the resonance number of the heating coil after the heating coil has been energized for a specified period of time; confirming the state information of the fan blades based on the detection parameters; including confirming that the fan blades are in the installation state when the resonance number is greater than the resonance number threshold.

[0017] In one implementation, the status information of the fan blades is confirmed based on the detection parameters; it also includes issuing a prompt message when the number of resonances is less than or equal to the resonance threshold, the prompt message being used to remind the user that the fan blades are not installed.

[0018] Secondly, embodiments of this application provide a control device for a cooking appliance, applied to the cooking appliance, which includes a cooking cavity, fan blades, and a heating coil. The fan blades are used to form an airflow circulation within the cooking cavity, and the heating coil is used to heat the cooking cavity and to detect the fan. The control device includes: a first execution module, a second execution module, a third execution module, a fourth execution module, and a fifth execution module. The first execution module is used to control the coil to be energized and heated in response to a heating command received. The second execution module is used to acquire detection parameters of the heating device. The third execution module is used to confirm the state information of the fan blades based on the detection parameters.

[0019] Thirdly, embodiments of this application provide a cooking appliance, which includes: a cooking cavity, fan blades, a heating device, one or more processors, a memory, and one or more application programs. The fan blades are used to form an airflow circulation within the cooking cavity, and the heating device includes a heating coil for heating the fan blades; wherein one or more application programs are stored in the memory and configured to be executed by one or more processors, and the one or more application programs are configured to perform the methods described above.

[0020] Fourthly, embodiments of this application provide a computer-readable storage medium storing program code, which is invoked by a processor to execute the method described above.

[0021] The fan blade detection method, control device, cooking appliance, and readable storage medium provided in this application embodiment can acquire the detection parameters of the heating device during the heating process, and confirm the state information of the fan blade based on the detection parameters, such as the deformation state and installation state of the fan blade. This can efficiently and accurately determine the state of the fan blade and then take corresponding measures. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of a cooking appliance with its lid open, as shown in one embodiment of this application, is illustrated.

[0024] Figure 2 A cross-sectional view of the cooking appliance with the lid closed is shown.

[0025] Figure 3 A circuit diagram of a heating device provided in one embodiment of this application is shown.

[0026] Figure 4 A flowchart illustrating a detection method according to the first embodiment of this application is shown.

[0027] Figure 5 A flowchart illustrating a detection method according to a second embodiment of this application is shown.

[0028] Figure 6 A flowchart illustrating a detection method according to a third embodiment of this application is shown.

[0029] Figure 7 A flowchart illustrating a detection method according to the fourth embodiment of this application is shown.

[0030] Figure 8 A flowchart illustrating a detection method according to the fifth embodiment of this application is shown.

[0031] Figure 9 A flowchart of a detection method according to the sixth embodiment of this application is shown.

[0032] Figure 10A structural block diagram of a control device according to an embodiment of this application is shown.

[0033] Figure 11 A structural block diagram of a cooking appliance according to an embodiment of this application is shown.

[0034] Figure 12 A structural block diagram of a computer-readable storage medium according to an embodiment of this application is shown. Detailed Implementation

[0035] The embodiments of this application are described in detail below, and examples of these embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0036] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0037] The "cooking appliance" used in this embodiment includes, but is not limited to, rice cookers, pressure cookers, air fryers, etc. This application uses an air fryer as an example for illustration.

[0038] In existing technologies, when using cooking appliances such as air fryers, the fan blades often splatter with grease during cooking. Therefore, the fan blades need to be cleaned after use to prevent damage to the food during subsequent use. After cleaning the fan blades, users need to reassemble them. During this process, the fan blades may not be properly installed, for example, not in the designated position or not securely attached. Using the appliance under these conditions risks the fan blades falling off, which could damage the appliance. Furthermore, prolonged use or mechanical damage to the fan blades may cause deformation, affecting normal cooking.

[0039] Therefore, the inventors of this application have proposed a fan blade detection method, control device, cooking appliance, and readable storage medium in the embodiments of this application to improve the above-mentioned problems. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0040] Please see Figure 1 , Figure 1The structure of a cooking appliance 1 is shown. The cooking appliance 1 may include: a pot body 10, a lid 20, a heating device 30, a fan blade 40, and a controller (not shown).

[0041] Please also refer to Figure 2 The pot body 10 may include a shell 110 and an inner pot 120. The inner pot 120 is detachably disposed within the shell 110, and its hollow interior forms a cooking cavity 121, which can be used to hold food to be cooked. The pot body 10 may be configured as a roughly cubic or cuboid structure, and the inner pot 120 may be configured as a bowl-shaped or cylindrical structure, etc., without limitation. It is understood that the inner pot 120 may be made of stainless steel, ceramic, aluminum alloy, or composite materials. Stainless steel inner pot 120 has good corrosion resistance, heat resistance, wear resistance, and easy cleaning. Ceramic inner pot 120 has the characteristics of high temperature resistance, corrosion resistance, good heat retention, and easy cleaning, and is also rich in trace elements beneficial to the human body. Aluminum alloy inner pot 120 has the advantages of good thermal conductivity, strong corrosion resistance, and light weight, but it is easily scratched and requires careful maintenance. The composite material inner liner 120 is made of a combination of multiple materials and has good thermal conductivity, wear resistance, and corrosion resistance. Specific selection can be made based on actual needs and is not limited here.

[0042] The top cover 20 is rotatably mounted on the housing 110 and is used to close the housing 110. It can also selectively open or close the cooking cavity 121. The top cover 20 can be hinged to the housing 110 so that it remains connected to the housing 110 even when opened, eliminating the need for the user to remove the top cover 20 separately, thus facilitating user operation.

[0043] A heating device 30 is disposed on the upper cover 20 and is used to heat the fan blade 40. In this embodiment, the heating element can use electromagnetic heating (IH) to heat the fan blade 40. For example, in this embodiment, the heating device 30 may include a heating coil, which can be disposed on the side of the fan blade 40 away from the cooking cavity 121. The heating coil can be used to heat the fan blade, and the heat generated by the heating coil can be blown into the cooking cavity by the fan blade 40. The fan blade 40 can be made of magnetic material, which is not limited here. For example, in some other embodiments, the heating device 30 can also use a heating wire, graphene, or ceramic lamp to generate heat to heat the fan blade 40. The specific choice can be made according to the actual situation.

[0044] In some implementations, please refer to Figure 3The heating device 30 may also include an insulated gate bipolar transistor 50 (IGBT), which is electrically connected to the heating coil. The IGBT 50 is disposed in the circuit loop of the heating device 30 and can be used to selectively control the heating coil to be energized or de-energized.

[0045] In other embodiments, the heating device 30 may further include a programmable pulse generator (PPG) 60. The PPG 60 is electrically connected to the heating coil and is also located in the circuit loop of the heating device 30. The PPG 60 can generate high-frequency, high-voltage pulses, which can be used for various control functions, such as timing, counting, and measurement. Furthermore, by changing parameters in the circuit, such as current, the programmable pulse generator can generate pulse signals of various frequencies, such as high-frequency pulses, medium-frequency pulses, and low-frequency pulses. These pulse signals can be used to study the response characteristics of circuits and systems to pulse signals.

[0046] The fan blade 40 is mounted on the upper cover 20 and is used to blow airflow into the inner pot 120. Specifically, the heating device 30 can heat the fan blade 40, thereby transferring heat to the fan blade 40. During rotation, the fan blade 40 transfers heat to the cooking cavity in the form of hot airflow, thus creating airflow circulation within the cooking cavity 121. Specifically, the axis of the fan blade 40 can be aligned with the axis of the inner pot 120, allowing more airflow from the fan blade 40 to enter the cooking cavity 121, improving the efficiency of airflow circulation within the cooking cavity 121.

[0047] The controller can be electrically connected to the heating device 30 and the fan blades 40, and can issue commands to the heating device 30 and the fan blades 40. The controller can also be used to control the heating device to heat at a specified power, obtain the actual output power of the heating device, and obtain detection parameters, etc.

[0048] First embodiment:

[0049] This embodiment provides a fan blade detection method, which can be applied to the aforementioned cooking utensils. (See attached document.) Figure 4 The fan blade detection method includes the following steps S110-S130:

[0050] Step S110: When a heating command is received, the heating coil is energized and heated in response to the heating command.

[0051] A heating command is a command issued by a cooking appliance to control the heating element and output power according to a specified power when the appliance starts working. Heating commands can be triggered by pressing a physical button on the appliance, by voice command via a built-in voice receiver, or by remote operation using a mobile device such as a smartphone; there are no restrictions on the method used.

[0052] Step S120: Obtain the detection parameters of the heating device.

[0053] The detection parameters can be various, including but not limited to the coil's resonant frequency, current, voltage, and impedance value; this embodiment does not limit these. By acquiring the detection parameters of the heating device, the current state of the heating coil can be determined, and thus the state of the fan blades can be determined.

[0054] Step S130: Confirm the status information of the fan blades based on the detection parameters.

[0055] Depending on the different detection parameters, different states of the fan blades can be determined. For example, by acquiring parameters such as current and voltage in the coil, the current output power can be obtained. By comparing it with the set power, it can be determined whether the current heating coil has reached the set power. Therefore, it can be determined whether the heating coil is affected by the state of the fan blades, and thus determine the state of the fan blades.

[0056] The fan blade detection method, control device, cooking appliance, and readable storage medium provided in this application embodiment can acquire the detection parameters of the heating device during the heating process, and confirm the state information of the fan blade based on the detection parameters, such as the deformation state and installation state of the fan blade. This can efficiently and accurately determine the state of the fan blade and then take corresponding measures.

[0057] Second embodiment:

[0058] This embodiment provides a fan blade detection method, which can be applied to the aforementioned cooking utensils. (See attached document.) Figure 5 The fan blade detection method includes the following steps S210-S250:

[0059] Step S210: When a heating command is received, in response to the heating command, the heating device is controlled to heat at a first preset power.

[0060] In this embodiment, the first preset power can be 1200W, 800W, or 600W for heating, for example. It should be noted that the first preset power can also be set by the user, and can be set according to the actual situation. Specifically, in this embodiment, the heating device includes a heating coil. When the heating device starts heating, the heating coil can generate heat after being energized and dissipate heat to the outside for heating.

[0061] Step S220: Confirm whether the heating device has reached the first preset power.

[0062] As mentioned above, confirming whether the heating device has reached the first preset power can be used to determine whether the cooking appliance has malfunctioned. In this embodiment, the first preset power can be calculated by obtaining the current current and voltage. It is understood that when the internal program of the cooking appliance malfunctions, or when the fan blade is deformed, the heating device may not be able to reach the first preset power. Therefore, this step can be used to preliminarily determine whether the fan blade has been deformed.

[0063] If the actual output power of the heating device is greater than or equal to the first preset power, it can be preliminarily confirmed that there is no fault in the internal program of the cooking appliance or that the fan blades have not been deformed. Then, step S130 can be executed for further testing.

[0064] Step S230: Obtain detection parameters.

[0065] As mentioned above, when the actual output power of the heating device is greater than or equal to the first preset power, it can be preliminarily confirmed that the fan blades have not deformed. At this point, the specific condition of the fan blades can be further inspected to ensure that the fan blades have not deformed.

[0066] In this embodiment, the detection parameters can be obtained by the controller to confirm whether the fan blades are installed in place. This application does not limit the specific form of the detection parameters. For example, in some embodiments, the detection parameters can be the voltage of the control electrode (C electrode voltage) of the IGBT. In other embodiments, the detection parameters can also be the resonant frequency of the heating coil in the heating device. The specific parameters can be selected according to the actual situation. In addition, the detection parameters here can also include environmental parameters such as the current voltage value and current value.

[0067] Step S240: Confirm whether the detection parameters are within the preset range.

[0068] As mentioned above, it can be understood that the above detection parameters can represent the current condition of the cooking appliance. Specifically, if the fan blades are correctly installed and have not been deformed, the above detection parameters should be within a preset range. If the detection parameters exceed the preset range, it indicates that the fan blades have been deformed, and step S250 can be executed at this time.

[0069] Step S250: Confirm that the fan blades are in an abnormal state.

[0070] As mentioned above, if the detection parameters are not within the preset range, it can be confirmed that the fan blades are in an abnormal state, and the fan blades may have already deformed. When the fan blades are in an abnormal state, continuing to heat may cause the fan blades to have difficulty evenly transferring heat to the cooking cavity during rotation, resulting in reduced heating efficiency. In addition, there is a safety hazard that the fan blades may fall off during rotation, causing damage to the fan blades and the inner pot. Therefore, it is recommended that users stop using the cooking appliance and adjust the fan blades to a normal state before using it again.

[0071] The detection method provided in this application uses preset parameters to confirm whether the fan blade has deformed. Specifically, after the coil in the heating device is energized, the coil generates a magnetic field and begins to resonate. When the fan blade deforms, it can be seen that the distance between the fan blade and the heating device increases, the inductance of the resonant system increases, and the resistance decreases. The detection parameters of the heating device will change accordingly. At this time, the heating device is controlled to heat at a first preset power. When the heating device can heat at the first preset power, it indicates that the current voltage and current have not affected the detection environment. Then, the detection parameters can be obtained and it can be confirmed whether the detection parameters are within the preset range. When the detection parameters are not within the preset range, it indicates that the fan blade has deformed and is in an abnormal state.

[0072] Third embodiment:

[0073] This application also provides another control method, see the embodiments below. Figure 6 The method includes the following steps S310-S380: It should be understood that the detection method in this embodiment has the same or corresponding implementation steps as the above embodiments. The specific description of these same or corresponding implementation steps can be referred to the content provided in the above embodiments, and will not be repeated in this embodiment.

[0074] Step S310: When a heating command is received, in response to the heating command, the heating device is controlled to heat at a first preset power.

[0075] Step S320: Confirm whether the heating device has reached the first preset power.

[0076] Understandably, the actual output power of the heating device can be determined based on the current voltage and current. If the actual output power of the heating device is equal to the first preset power, the cooking device can operate normally, and there is no abnormality within the cooking device.

[0077] If the actual output power of the heating device does not reach the first preset power, it indicates that the cooking device is malfunctioning. At this time, it is necessary to further investigate the cause of the malfunction, and step S360 can be executed.

[0078] Step S360: Confirm whether the current through the heating coil reaches the first threshold.

[0079] As mentioned above, it should be noted that in order to avoid unnecessary safety hazards caused by excessive current passing through the heating coil, a PPG can be set in the heating coil circuit to limit the current. For example, the PPG can limit the maximum allowable current to 5 amps, 1 amp, or 0.5 amps, etc., and the specific setting can be made according to the actual situation.

[0080] If the actual output power of the heating device does not reach the first preset power, it indicates that the cooking appliance may be malfunctioning. The cause of the malfunction may be insufficient voltage or deformation of the fan blades.

[0081] Specifically, since the actual output power of the heating device is the product of the current voltage and the current, if the current voltage is insufficient, the current passing through the heating device needs to be increased so that the power of the heating device reaches the first preset power.

[0082] Due to the limitations of PPG, if the current has reached the first threshold, but the actual output power of the heating device is still less than the first preset power, it indicates that the cause of the above-mentioned fault may be insufficient voltage. At this time, step S370 can be executed to further confirm whether the above-mentioned fault is caused by insufficient voltage.

[0083] Step S370: Control the heating coil to heat at the second preset power.

[0084] As mentioned earlier, if the current through the heating coil has reached the first threshold, but the actual output power of the heating coil has not yet reached the first preset power, it indicates that the current voltage is too low, or that the fan blades have deformed. In this case, further investigation is needed to determine the specific reason why the heating device has not reached the first preset power. At this point, the heating coil can be controlled to heat at a second preset power, where the second preset power is less than the first preset power. That is, if the heating coil cannot output at the first preset power, its output power is reduced. This reduces the voltage and current required by the heating coil, thus confirming whether the reason the heating coil cannot reach the first preset power is due to insufficient current voltage.

[0085] It should be noted that the embodiments of this application do not limit the specific values ​​of the first preset power and the second preset power, nor do they limit the number of times the output power is reduced. For example, in some other embodiments, the output power can be reduced by 200W-400W from the first preset power to the second preset power. If the first preset power is 1000W, the second preset power can be 800W, or it can be 600W, etc. Furthermore, if the second preset power is set to 800W and the heating coil still cannot reach 800W, the heating coil can be controlled to output at a third preset power, which can be 600W or 400W.

[0086] Step S380: Confirm whether the heating device has reached the second preset power.

[0087] Similarly, the actual output power of the heating device is the product of the current voltage and the current current. If the actual output power of the heating device does not reach the second preset power, it may be due to insufficient current voltage or deformation of the fan blades. Therefore, further testing is needed to determine the specific cause of the actual output power of the heating device.

[0088] If the actual output power of the heating coil is greater than or equal to the second preset power, it indicates that the reason why the heating coil has not reached the first preset power is insufficient voltage. At this time, step S330 can be executed to further confirm whether the above-mentioned fault is caused by the deformation of the fan blade.

[0089] Similarly, if the actual output power of the heating coil is less than the second preset power, it indicates that the fan blades have likely deformed. In this case, step S330 can be executed to further confirm whether the above-mentioned fault is caused by the deformation of the fan blades.

[0090] If the actual output power of the heating device is greater than or equal to the first preset power, step S330 can be executed to further confirm whether the fan blades have deformed. Multiple detections can improve the accuracy of the final detection.

[0091] Step S330: Obtain detection parameters.

[0092] As mentioned above, if the actual output power of the heating coil cannot reach the second preset power, it is highly likely that the fan blade has been deformed. At this time, obtaining the detection parameters and comparing the detection parameters with the preset range can further ensure that the fan blade has been deformed.

[0093] Step S340: Confirm whether the detection parameters are within the preset range.

[0094] If the detection parameters are not within the preset range, proceed to step S350.

[0095] Step S350: Confirm that the fan blades are in an abnormal state, issue a warning message and / or control the heating device to shut down.

[0096] As mentioned above, when the fan blades are in an abnormal state, it indicates that the blades have deformed, and continued use of the cooking appliance poses a safety hazard. Therefore, in one embodiment, a warning message can be issued to alert the user that the fan blades are abnormal. This application does not limit the specific form of the warning message. For example, in some cooking appliances with a sound module, the warning message can be a sound emitted by the appliance to alert the user. Similarly, in some cooking appliances with a vibration module, the warning message can be vibration emitted by the appliance to alert the user. Furthermore, in some cooking appliances with a display module, the warning message can be a video display emitted by the appliance to alert the user. Additionally, in some cooking appliances with a transmission module, the warning message can be a prompt sent by the appliance to the user's terminal, etc.

[0097] In another embodiment, when the fan blades are in an abnormal state, the heating device can be shut off. This not only saves energy but also reduces the safety hazards of cooking appliances and the possibility of damage to them.

[0098] Understandably, in another implementation, when the fan blades are in an abnormal state, the heating device can be shut down and a warning message can be issued. This not only reduces the safety hazards of cooking appliances, but also serves as a reminder to the user.

[0099] The detection method provided in this application embodiment controls the heating device to heat at a first preset power, determines whether the actual output power of the heating device is greater than the first preset power, and if the actual output power of the heating device is less than the first preset power, the output power of the heating device is reduced, and the heating device is controlled to heat at a second preset power, and the actual output power of the heating device is determined to be greater than the second preset power to eliminate the influence of voltage. Then, preset parameters are detected to confirm whether the fan blade has deformed. Specifically, after the coil in the heating device is energized, the coil generates a magnetic field and begins to resonate. When the fan blade deforms, it can be regarded as the distance between the fan blade and the heating device increases, the inductance of the resonant system increases, and the resistance decreases. The detection parameters of the heating device will change accordingly. At this time, the heating device is controlled to heat at the first preset power. When the heating device can heat at the first preset power, it indicates that the current voltage and current have not affected the detection environment. Then, the detection parameters can be obtained and it can be confirmed whether the detection parameters are within the preset range. When the detection parameters are not within the preset range, it indicates that the fan blade has deformed and is in an abnormal state.

[0100] Fourth embodiment:

[0101] Based on the aforementioned detection method, this application embodiment also provides another control method, see reference. Figure 7 The method includes the following steps S410-S450: It should be understood that the detection method in this embodiment has the same or corresponding implementation steps as the above embodiments. The specific description of these same or corresponding implementation steps can be referred to the content provided in the above embodiments, and will not be repeated in this embodiment.

[0102] Step S410: When a heating command is received, in response to the heating command, the heating device is controlled to heat at a first preset power.

[0103] Step S420: Confirm whether the heating device has reached the first preset power.

[0104] If the actual output power of the heating device is greater than or equal to the first preset power, then step S430 is executed.

[0105] Step S430: Obtain the resonant frequency of the heating coil.

[0106] It should be noted that the resonant frequency of the heating coil can also be used as a detection parameter. The resonant frequency of the heating coil refers to the frequency of the electromagnetic oscillation generated by the heating coil when it is working. After the heating coil is energized, it generates a magnetic field and begins to resonate. If the fan blades deform, it is equivalent to increasing the distance between the fan blades and the heating coil. At this time, the inductance of the resonant system increases and the resistance decreases. When the same voltage is input to the heating coil and the same power is output, the resonant frequency will decrease.

[0107] Step S440: Confirm whether the resonant frequency of the heating coil is within the preset range.

[0108] As mentioned above, if the fan blades are correctly installed and have not deformed, the resonant frequency of the heating coil should be within the preset range. If the resonant frequency of the heating coil exceeds the preset range, it indicates that the fan blades have deformed. Therefore, the resonant frequency of the heating coil can be used to reflect whether the fan blades have deformed.

[0109] If the resonant frequency of the heating coil is not within the preset range, then step S450 is executed.

[0110] Step S450: Confirm that the fan blades are in an abnormal state, issue a warning message and / or control the heating device to shut down.

[0111] The detection method provided in this application confirms whether the fan blade has deformed by detecting preset parameters. Specifically, after the coil in the heating device is energized, the coil generates a magnetic field and begins to resonate. When the fan blade deforms, it can be seen that the distance between the fan blade and the heating device increases, the inductance of the resonant system increases, and the resistance decreases. The detection parameters of the heating device will change accordingly. At this time, the heating device is controlled to heat at a first preset power. When the heating device can heat at the first preset power, it indicates that the current voltage and current have not affected the detection environment. Then, the resonant frequency of the heating coil can be obtained, and it can be confirmed whether the resonant frequency of the heating coil is within the preset range. When the resonant frequency of the heating coil is not within the preset range, it indicates that the fan blade has deformed and is in an abnormal state.

[0112] Fifth embodiment:

[0113] Based on the above detection method, this application embodiment also provides another control method, see reference. Figure 8 The method includes the following steps S510-S550: It should be understood that the detection method in this embodiment has the same or corresponding implementation steps as the above embodiments. The specific description of these same or corresponding implementation steps can be referred to the content provided in the above embodiments, and will not be repeated in this embodiment.

[0114] Step S510: When a heating command is received, in response to the heating command, the heating device is controlled to heat at a first preset power.

[0115] Step S520: Confirm whether the heating device has reached the first preset power.

[0116] If the actual output power of the heating device is greater than or equal to the first preset power, then step S530 is executed.

[0117] Step S530: Obtain the collector voltage of the I GTB.

[0118] It should be noted that the collector voltage (C-terminal voltage) of the IGBT can also be used as a detection parameter. The main function of the collector voltage is to control the switching state of the IGBT. By adjusting the amplitude and duty cycle of the collector voltage, the switching state of the IGBT can be controlled, thereby regulating the current and voltage in the circuit. When the heating coil is energized, it generates a magnetic field and begins to resonate. If the fan blades deform, it is equivalent to increasing the distance between the fan blades and the heating coil. At this time, the inductance of the resonant system increases and the resistance decreases. When the same voltage is input to the heating coil and the same power output is achieved, the collector voltage of the IGBT will increase.

[0119] Step S540: Confirm whether the collector voltage of the I GTB is within the preset range.

[0120] As mentioned above, if the fan blades are correctly installed and have not deformed, the collector voltage of the IGBT should be within the preset range. If the collector voltage of the IGBT exceeds the preset range, it indicates that the fan blades have deformed. Therefore, the collector voltage of the IGBT can be used to reflect whether the fan blades have deformed.

[0121] If the collector voltage of the I GTB is not within the preset range, then step S450 is executed.

[0122] Step S550: Confirm that the fan blades are in an abnormal state, issue a warning message and / or control the heating device to shut down.

[0123] The detection method provided in this application embodiment controls the heating device to heat at a first preset power, determines whether the actual output power of the heating device is greater than the first preset power, and obtains the collector voltage of the IGBT. The collector voltage of the IGBT is compared with a preset range. When the collector voltage of the IGBT is not within the preset range, it is confirmed that the fan blade is in an abnormal state. Since the fan blade may not be installed correctly after installation, and may deform during use, these factors can affect the normal operation of the cooking appliance. The above method can help users confirm whether the fan blade is deformed.

[0124] Sixth Embodiment

[0125] See Figure 9 This embodiment provides a fan blade detection method, including steps S610-S650:

[0126] Step S610: When a heating command is received, in response to the heating command, the heating coil is energized and heated.

[0127] When the heating coil is energized, the voltage waveform has three phases within one cycle of alternating current: a positive half-cycle, a negative half-cycle, and zero. The sine wave of the mains power crosses zero twice within each cycle. Since the frequency of the mains power is 50Hz, the time interval between two adjacent zero-crossing moments is determined to be 10ms. Specifically, in this embodiment, detection can be performed at the zero-crossing point, which makes subsequent detection more convenient and accurate.

[0128] Step S620: After the heating coil is energized for a specified period of time, obtain the number of resonances of the heating coil.

[0129] As mentioned above, in this embodiment, the specified duration is the specified duration starting from the zero point. The specified duration can be 0-10us, such as 4us, 6us or 10us. If the heating coil is energized for too long, it will lead to energy waste and prolong the detection time. Preferably, in this embodiment, the specified duration is 10us.

[0130] In this embodiment, the fan blades are made of magnetic material. When energized, the heating coil induces electromagnetic induction with the fan blades, causing them to generate heat. The heating coil generates a magnetic field and begins to resonate. At this point, the energy of the heating coil interacts with the coil's resistance and the surrounding medium (such as air or the fan blades), producing a damping effect. This damping gradually reduces the resonance amplitude until the heating coil reaches a stable state. During each resonance, the heating coil collides and rubs against the surrounding medium, resulting in energy loss. Therefore, as the number of resonances increases, the energy of the heating coil gradually decreases until it is exhausted.

[0131] Understandably, the energy consumed when the heating coil interacts with the air is significantly slower than the energy consumed when it interacts with the fan blades. If fan blades are installed, the energy consumption rate of the heating coil will increase, and the resonance frequency of the heating coil will decrease accordingly. Therefore, the resonance frequency of the heating coil can be used to determine whether the fan blades are installed correctly.

[0132] Step S630: Confirm whether the number of resonances is greater than the resonance number threshold.

[0133] If yes, proceed to step S640. If no, proceed to step S650.

[0134] Step S640: Confirm that the fan blades are in the installed state.

[0135] As mentioned earlier, the resonance number threshold here refers to the number of times the heating coil resonates after being energized for a specified period of time without the fan blades installed. This threshold can be obtained by measuring the resonance number after removing the fan blades and energizing the heating coil. When the resonance number is less than the threshold, it indicates that the fan blades have been installed. When the fan blades are installed, further checks can be performed to determine if there is any deformation.

[0136] Step S650: Issue a prompt message to inform the user that the fan blades are not installed.

[0137] As mentioned above, when the resonance number is greater than or equal to the resonance threshold, it indicates that the fan blades are not installed. At this time, the controller can issue a prompt message. This embodiment does not limit the specific form of the prompt message. For example, in some cooking appliances with a sound module, the prompt message can be a sound emitted by the appliance to alert the user. Similarly, in some cooking appliances with a vibration module, the prompt message can be vibration emitted by the appliance to alert the user. Furthermore, in some cooking appliances with a display module, the prompt message can be a video display emitted by the appliance to alert the user. Additionally, in some cooking appliances with a transmission module, the prompt message can be a notification sent by the appliance to the user terminal. The aforementioned prompt messages can be used to remind the user that the fan blades are not installed, preventing the user from using the cooking appliance while the fan blades are not installed, thus avoiding damage to the appliance.

[0138] Please see Figure 10 This application provides a control device 400 for a cooking appliance, which is applied to the cooking appliance. The cooking appliance includes a cooking cavity, a fan blade, and a heating device. The fan blade is used to form an airflow circulation in the cooking cavity, and the heating device includes a heating coil for heating the fan blade.

[0139] In a specific embodiment, the control device 400 includes: a first execution module 410, a second execution module 420, a third execution module 430, a fourth execution module 440, and a fifth execution module 450.

[0140] The first execution module 410 is configured to, upon receiving a heating command, control the heating coil to be energized for heating in response to the heating command. In some embodiments, the first execution module 410 is configured to, upon receiving a heating command, control the heating device to heat at a first preset power in response to the heating command.

[0141] The second execution module 420 is used to acquire detection parameters of the heating device. In some embodiments, the second execution module 420 is used to confirm whether the heating device has reached a first preset power; if the actual output power of the heating device is greater than or equal to the first preset power, the detection parameters are acquired. In some embodiments, the second execution module 420 is also used to confirm whether the current through the heating coil has reached a first threshold if the actual output power of the heating device has not reached the first preset power; when the current through the heating coil reaches the first threshold, the heating coil is controlled to heat at a second preset power, which is less than the first preset power.

[0142] In some implementations, the second execution module 420 is used to obtain the number of resonances of the heating coil after the heating coil has been energized for a specified period of time.

[0143] The third execution module 430 is used to confirm the status information of the fan blades based on the detection parameters. In some embodiments, the third execution module 430 is used to confirm that the fan blades are in an abnormal state if the detection parameters are not within a preset range. In some embodiments, the third execution module 430 is used to confirm that the fan blades are in the installation state when the resonance number is greater than the resonance number threshold.

[0144] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0145] In the several embodiments provided in this application, the coupling between modules can be electrical, mechanical, or other forms of coupling.

[0146] Please see Figure 11 This embodiment also provides a cooking appliance 500, and the aforementioned detection method can be applied to the cooking appliance 500 of this embodiment. The cooking appliance 500 may include an inner pot, a display screen 506, a heating device 509, a fan blade 508, and one or more (only one is shown in the figure) processors 502 and memory 504 coupled to each other.

[0147] The display screen 506, heating device 509, and fan blades 508 are all electrically connected to the processor 502 and can perform predetermined operations under the control of the processor 502. The display screen 506 can display a user interface and is used for human-computer interaction. The heating device 509 can heat the fan blades 508, which can create airflow circulation within the cooking cavity. The memory 504 stores programs that can execute the contents of the aforementioned embodiments, and the processor 502 can execute the programs stored in the memory 504.

[0148] The processor 502 may include one or more processing cores. The processor 502 connects to various parts within the cooking appliance 500 using various interfaces and lines, and performs various functions and processes data of the cooking appliance 500 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 504, and by calling data stored in the memory 504. Optionally, the processor 502 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 502 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 502 and may be implemented separately using a communication chip.

[0149] The memory 504 may include random access memory (RAM) or read-only memory (ROM). The memory 504 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 504 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described above. The data storage area may also store data created during the use of the cooking appliance 500 (such as phone books, audio and video data, chat log data, etc.). It is understood that the cooking appliance 500 in this application may be a rice cooker, an air fryer, a microwave oven, an oven, etc.

[0150] See Figure 12This application provides a structural block diagram of a computer-readable storage medium 1000. The computer-readable medium stores program code 1100, which can be invoked by a processor to execute the detection method described in any of the above method embodiments. The computer-readable storage medium 1000 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 1000 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 1000 has storage space for program code 1100 that performs any of the method steps described above. This program code 1100 can be read from or written to one or more computer program products. The program code 1100 may be compressed, for example, in a suitable form.

[0151] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for detecting fan blades, characterized in that, The method is applied to a cooking appliance, which includes a cooking cavity, fan blades, and a heating device. The fan blades are used to create airflow circulation within the cooking cavity, and the heating device includes a heating coil for heating the fan blades. When a heating command is received, the heating coil is energized and heated in response to the heating command. Obtain the detection parameters of the heating device; The status information of the fan blades is confirmed based on the detection parameters.

2. The detection method according to claim 1, characterized in that, The step of receiving a heating command and, in response to the heating command, controlling the heating coil to be energized for heating includes: When a heating command is received, the heating device is controlled to heat at a first preset power in response to the heating command; The acquisition of the detection parameters of the heating device includes: Confirm whether the heating device has reached the first preset power; If the actual output power of the heating device is greater than or equal to the first preset power, obtain the detection parameters; The step of confirming the state information of the fan blades based on the detection parameters includes: Confirm whether the detection parameters are within the preset range; If the detection parameters are not within the preset range, the fan blade is confirmed to be in an abnormal state.

3. The detection method according to claim 2, characterized in that, When it is confirmed that the fan blades are in an abnormal state, the method further includes: issuing a warning message and / or controlling the heating device to shut down.

4. The detection method according to claim 2, characterized in that, The step of obtaining the detection parameters of the heating device further includes: If the actual output power of the heating device does not reach the first preset power, check whether the current through the heating coil reaches the first threshold. When the current through the heating coil reaches the first threshold, the heating coil is controlled to heat at a second preset power, where the second preset power is less than the first preset power; and The detection parameters are acquired when the current through the heating coil does not reach the first threshold.

5. The detection method according to any one of claims 1-4, characterized in that, The detection parameter is the resonant frequency of the heating coil; and / or, the heating device further includes an insulated gate bipolar transistor (IGBT), which is used to selectively control the heating coil to be energized or de-energized, and the detection parameter is the voltage of the control electrode of the IGBT.

6. The detection method according to claim 1, characterized in that, The acquisition of the detection parameters of the heating device includes: After the heating coil is energized for a specified period of time, the number of resonances of the heating coil is obtained; The step of confirming the state information of the fan blades based on the detection parameters includes: When the resonance number is greater than the resonance number threshold, the fan blade is confirmed to be in the installation state.

7. The detection method according to claim 6, characterized in that, The step of confirming the state information of the fan blades based on the detection parameters also includes: When the resonance number is less than or equal to the resonance number threshold, a prompt message is issued to remind the user that the fan blade is not installed.

8. A control device for a cooking utensil, characterized in that, The invention relates to a cooking appliance, which includes a cooking chamber, fan blades, and a heating device. The fan blades are used to create airflow circulation within the cooking chamber, and the heating device includes a heating coil for heating the fan blades. The control device includes: The first execution module is used to control the heating coil to be energized for heating in response to the heating command when a heating command is received; The second execution module is used to acquire the detection parameters of the heating device; The third execution module is used to confirm the status information of the fan blades based on the detection parameters.

9. A cooking utensil, characterized in that, The cooking appliance includes a cooking chamber, fan blades, and a heating device. The fan blades are used to create airflow circulation within the cooking chamber, and the heating device includes a heating coil for heating the fan blades. The cooking appliance also includes: One or more processors; Memory; One or more applications, wherein the one or more said applications are stored in the memory and configured to be executed by one or more said processors, the one or more said applications being configured to perform the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that is invoked by a processor to execute the method as described in any one of claims 1 to 7.

Images