Temperature abnormity processing method for hot air heating device

Abstract

The invention discloses a temperature anomaly processing method for a hot air heating device, and belongs to the technical field of heating device working methods.The temperature anomaly processing method comprises the steps that S100, if the temperature rise of a temperature detection element within a first time interval delta t1 reaches delta T1, the temperature detection element is started; the control module judges the occurrence of temperature abnormity according to the temperature signal fed back by the temperature detection element, and executes the step S200; s200, the control module starts countdown, if the temperature rise of the temperature detection element within the second time interval delta t2 reaches delta T2, the control module judges that the temperature is abnormal and continuous according to a temperature signal fed back by the temperature detection element, and the step S300 is executed; and S300, the control module executes the protection program. According to two dynamic temperature rise signals of the temperature detection element, whether the temperature of the device is abnormal or not is judged, the accuracy of judgment can be greatly improved, when the temperature abnormal condition does not occur really, the heating piece conducts heating normally, and the working effect of the device can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of working methods of heating devices, and in particular to a method for handling temperature anomalies in a hot air heating device. Background Art

[0002] A hot air gun is a heating tool used to heat air to form hot air. It has multiple uses. Specifically, hot air guns can be used to remove rust, remove old paint on metal surfaces, remove self-adhesive stickers, heat plastic hoses to make them bend, dry damp wood, heat packaging film or packaging tubes to make them shrink, heat polyethylene used to connect metals to make them shrink, heat welding materials to soften them, etc. Hot air can also be used to weld or remove components.

[0003] In order to prevent the hot air gun from being damaged by overheating, the existing hot air guns are generally provided with a fixed upper limit temperature value. When the heating temperature of the heating wire reaches the upper limit temperature value, the power supply component stops supplying power to the heating wire, causing the heating wire to stop heating. However, when the air outlet of the hot air gun is blocked in a short period of time, resulting in the hot air being unable to be discharged in time, or other circumstances occur that result in the hot air being unable to be discharged in time, the temperature of the heating wire rises, and the heating temperature of the heating wire easily reaches the upper limit temperature value and stops heating. If the situation in which the hot air cannot be discharged in time is quickly resolved, the heating wire is powered on again for heating. In this case, the hot air gun can only determine whether it is necessary to stop heating based on the actual temperature value of the heating wire, and cannot make a specific judgment based on the specific situation of whether the air outlet is blocked, which is not conducive to improving the accuracy of the judgment, nor is it conducive to ensuring the working effect of the hot air gun. Summary of the invention

[0004] In order to solve the shortcomings and deficiencies in the above-mentioned prior art, the present invention provides a temperature anomaly processing method for a hot air heating device, which adopts a dynamic detection method to determine whether a temperature anomaly actually occurs. The control module enables the heating element to stop heating when a temperature anomaly actually occurs, thereby improving the accuracy of judging temperature anomalies and helping to improve the working effect of the device.

[0005] In order to achieve the above technical objectives, the present invention provides a method for handling temperature anomalies in a hot air heating device, the hot air heating device comprising a casing, a control module, a hot air component arranged in the casing, a power supply for powering and a temperature detection element for detecting the heating temperature, the hot air component comprising a motor, a fan driven by the motor and a heating element that generates heat when powered on, the motor drives the fan to rotate to send the heat generated by the heating element out of the casing through an air outlet to form a hot air flow for heating an object, the power supply, the motor and the heating element are all controlled by the control module, the temperature detection element signal is connected to the control module, and the temperature anomaly handling method comprises the following steps:

[0006] Step S100, if the temperature rise of the temperature detection element within the first time interval Δt1 reaches ΔT1, the control module determines that a temperature anomaly occurs according to the temperature signal fed back by the temperature detection element, and executes step S200;

[0007] Step S200, the control module starts the countdown. If the temperature rise of the temperature detection element reaches ΔT2 within the second time interval Δt2, the control module determines that the temperature abnormality persists according to the temperature signal fed back by the temperature detection element, and executes step S300;

[0008] Step S300: The control module executes a protection program.

[0009] Preferably, the protection program executed by the control module is to instruct the power supply component to stop supplying power to the heating component.

[0010] Preferably, the temperature anomaly processing method further includes step S400:

[0011] Step S400: If the temperature drop of the temperature detection element within the third time interval Δt3 reaches ΔT3, the control module determines that the temperature anomaly is resolved according to the temperature signal fed back by the temperature detection element and instructs the power supply element to supply power to the heating element.

[0012] Preferably, the temperature detection element has a thermal equilibrium temperature value Tp. In step S400, if the actual temperature value of the temperature detection element exceeds the thermal equilibrium temperature value Tp, the control module determines that the temperature anomaly persists based on the temperature signal fed back by the temperature detection element. The control module obtains the actual temperature value of the temperature detection element in real time and records the maximum actual temperature value Tmax. If the temperature drop of the temperature detection element from the maximum actual temperature value Tmax reaches ΔT3 within a third time interval Δt3, the control module determines that the temperature anomaly is resolved based on the temperature signal fed back by the temperature detection element.

[0013] Preferably, the temperature detection element is used to detect the temperature of the heating element.

[0014] Preferably, the temperature detection element is arranged between the motor and the heating element.

[0015] Preferably, a voltage dividing element is connected in series to the power connection circuit of the motor.

[0016] Preferably, ΔT1 is 2° C. to 5° C.; and / or, the first time interval Δt1 is 2s to 4s.

[0017] Preferably, ΔT2 is 2° C. to 5° C.; and / or, the second time interval Δt2 is 2s to 4s.

[0018] Preferably, ΔT3 is 3° C. to 6° C.; and / or, the second time interval Δt3 is 1s to 3s.

[0019] After adopting the above technical solution, the present invention has the following advantages:

[0020] 1. The temperature anomaly processing method provided by the present invention, if the temperature detection element has a temperature rise within the first time interval, the control module determines that the device has a temperature anomaly based on the temperature signal of the temperature detection element. When the temperature of the temperature detection element does not rise further, it indicates that the temperature anomaly is resolved in time, and at this time, the heating element continues to heat. When the temperature detection element continues to rise in the second time interval, the control module determines that the temperature anomaly of the device continues based on the temperature signal of the temperature detection element, and the control module executes a protection program accordingly. The protection program can be that the control module commands the power supply to stop supplying power to the heating element, so as to avoid the situation where the heating element continues to heat when the device actually has a temperature anomaly, causing the device to be overheated and damaged, thereby improving the safety of the device.

[0021] The temperature anomaly processing method provided by the present invention determines whether a temperature anomaly actually occurs in the device based on the two dynamic temperature rise signals of the temperature detection element, which can greatly improve the accuracy of the judgment. When the temperature anomaly does not actually occur, the heating element heats normally to ensure the working effect of the device.

[0022] 2. When the temperature drop of the temperature detection element in the third time interval meets the preset requirements, it indicates that the heat inside the device can be discharged smoothly and the abnormal temperature condition has been resolved. At this time, the control module instructs the power supply component to supply power to the heating component so that the heating component can heat normally. Reasonable setting of the basis for the control module to judge whether the abnormal temperature condition has been resolved improves the accuracy of the judgment, thereby ensuring the working stability of the device.

[0023] 3. When the actual temperature value of the temperature detection element exceeds the thermal equilibrium temperature value Tp, the control module determines that the temperature anomaly persists based on the actual temperature value of the temperature detection element. The control module obtains the actual temperature value of the temperature detection element in real time and records the maximum actual temperature value Tmax. If the temperature drop of the temperature detection element from the maximum actual temperature value Tmax within the third time interval reaches ΔT3, it indicates that the temperature anomaly is resolved. The control module determines whether the device has truly resolved the temperature anomaly based on the dynamic temperature drop signal of the temperature detection element, which is conducive to improving the accuracy of the judgment.

[0024] 4. The temperature detection element is used to detect the temperature of the heating element. Reasonable setting of the detection object of the temperature detection element can improve the accuracy of detecting the heating temperature, thereby improving the accuracy of temperature abnormality judgment. The temperature detection element is preferably arranged between the motor and the heating element, so that the temperature detection element can be arranged as close to the heating element as possible, which is conducive to further improving the accuracy of detecting the heating temperature.

[0025] 5. A voltage divider element is connected in series to the power circuit of the motor, and the voltage supplied by the power supply component to the motor is adjusted through the voltage divider element, thereby adjusting the speed of the motor so that the speed of the motor is adapted to the heating gear of the device.

[0026] 6. Reasonably set the temperature rise ΔT1, temperature rise ΔT2, first time interval Δt1, and second time interval Δt2 to avoid the control module from making misjudgments when the heating temperature fluctuates normally, and to avoid the control module from failing to take timely action when the heating temperature fluctuates greatly, so as to ensure the accuracy of judgment and the working stability of the device.

[0027] 7. Reasonably set the temperature drop ΔT3 and the third time interval Δt3 so that the temperature detection element has a reasonable temperature drop within a reasonable time interval, ensuring the accuracy of the control module in determining whether the temperature anomaly is truly resolved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the hot air heating device in Example 1;

[0029] Figure 2 An exploded view of the hot air assembly in Example 1;

[0030] Figure 3 This is a schematic diagram of the arrangement of some hot air components and temperature detection elements in Example 1;

[0031] Figure 4 This is a schematic diagram of power connection in Embodiment 1;

[0032] Figure 5 This is a flow chart of a method for handling abnormal temperature in Example 1;

[0033] Figure 6 This is a schematic diagram of temperature changes of the temperature detection element in the first embodiment under normal conditions;

[0034] Figure 7 Schematic diagram of temperature change of the temperature detection element under abnormal temperature conditions in Example 1.

[0035] In the figure, 100-housing, 110-handle, 120-button, 130-adjusting part, 200-control module, 300-hot air assembly, 310-motor, 320-fan, 330-heating part, 340-air outlet, 350-bracket, 351-frame, 352-frame cover, 360-connecting seat, 370-support frame, 380-sleeve, 390-voltage divider element, 400-power supply part, 500-temperature detection element. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0037] Embodiment 1

[0038] Combination Figures 1 to 7 , a method for handling temperature anomalies for a hot air heating device provided in a first embodiment of the present invention, the hot air heating device comprises a housing 100, a control module 200, a hot air assembly 300 arranged in the housing 100, a power supply 400 for powering and a temperature detection element 500 for detecting the heating temperature, the hot air assembly 300 comprises a motor 310, a fan 320 driven by the motor 310 and a heating element 330 for generating heat when powered on, the motor 310 drives the fan 320 to rotate and sends the heat generated by the heating element 330 out of the housing 100 through an air outlet 340 to form a hot air flow for heating an object, the power supply 400, the motor 310 and the heating element 330 are all controlled by the control module 200, and the temperature detection element 500 is connected to the control module 200 by signal.

[0039] The temperature anomaly handling method includes the following steps:

[0040] Step S100, if the temperature rise of the temperature detection element 500 within the first time interval Δt1 reaches ΔT1, the control module 200 determines that a temperature anomaly occurs according to the temperature signal fed back by the temperature detection element 500, and executes step S200;

[0041] Step S200: The control module 200 starts the countdown. If the temperature rise of the temperature detection element 500 reaches ΔT2 within the second time interval Δt2, the control module 200 determines that the temperature abnormality persists according to the temperature signal fed back by the temperature detection element 500, and executes step S300.

[0042] Step S300: The control module 200 executes a protection program.

[0043] Combination Figure 1 The hot air heating device of this embodiment is described by taking a hot air gun as an example. The housing 100 is formed with a handle 110. A button 120 for starting the device is provided on the front side of the handle 110. An adjusting member 130 for adjusting the heating intensity is provided on the housing 100. Figure 2The hot air assembly 300 also includes a bracket 350, a connection seat 360, a support frame 370 and a sleeve 380. The bracket 350 includes a frame body 351 and a frame cover 352 fixed together. The fan 320 is rotatably arranged in a cavity enclosed by the frame body 351 and the frame cover 352. The fan 320 is arranged at the front end of the motor 310 through the bracket 350 and is driven by the motor 310. The heating element 330 uses a heating wire, which is wound on the support frame 370. The sleeve 380 is sleeved on the outside of the support frame 370. The rear end of the support frame 370 is fixed to the bracket 350 through the connection seat 360, and the air outlet 340 is arranged at the front end of the sleeve 380. When the hot air gun is working, the heating element 330 is energized to generate heat, and the motor 310 drives the fan 320 to rotate to form an airflow flowing from the back to the front. The airflow carries the heat generated by the heating element 330 and blows out from the air outlet 340 to form a hot air flow.

[0044] Combination Figure 3 The temperature detection element 500 is used to detect the temperature of the heating element 330. In order to improve the detection accuracy, in this embodiment, the temperature detection element 500 is preferably arranged between the motor 310 and the heating element 330, so that the heating element 330 is arranged as close to the heating element 330 as possible. Specifically, the temperature detection element 500 in this embodiment is preferably a thermistor, and the temperature detection element 500 can be arranged on the front side of the connecting seat 360. It can be understood that the temperature detection element 500 can also be other electronic components whose resistance value can change accordingly according to the temperature.

[0045] Combination Figure 4 , the power supply 400 supplies power to the motor 310 and the heating element 330 through the control module 200. In order to facilitate the adjustment of the hot air intensity of the hot air heating device, a voltage divider element 390 is connected in series to the power circuit of the motor 310. The voltage supplied by the power supply 400 to the motor 310 can be adjusted by the voltage divider element 390, thereby adjusting the speed at which the motor 310 drives the fan 320 to rotate. In this embodiment, the voltage divider element 390 preferably adopts a variable resistor, and the voltage divider element 390 is set as close to the temperature detection element 500 as possible. It can be understood that the voltage divider element 390 can also adopt other structures that can play a voltage dividing role, such as a voltage divider circuit.

[0046] In this embodiment, the protection program executed by the control module 200 is preferably that the control module 200 commands the power supply 400 to stop supplying power to the heating element 330, so as to prevent the heating element 330 from continuing to heat when a real temperature abnormality occurs, causing overheating and damage to the device.

[0047] The temperature anomaly processing method in this embodiment also includes step S400. In step S400, if the temperature drop of the temperature detection element 500 reaches ΔT3 within the third time interval Δt3, the control module 200 determines that the temperature anomaly is resolved based on the temperature signal fed back by the temperature detection element 500 and instructs the power supply 400 to supply power to the heating element 330.

[0048] The temperature detection element 500 has a thermal equilibrium temperature value Tp. In step S400, if the actual temperature value of the temperature detection element 500 exceeds the thermal equilibrium temperature value Tp, the control module 200 determines that the temperature anomaly persists based on the temperature signal fed back by the temperature detection element 500. The control module 200 obtains the actual temperature value of the temperature detection element 500 in real time and records the maximum actual temperature value Tmax. If the temperature drop of the temperature detection element 500 from the maximum actual temperature value Tmax within a third time interval Δt3 reaches ΔT3, the control module 200 determines that the temperature anomaly is resolved based on the temperature signal fed back by the temperature detection element 500.

[0049] Combination Figure 4 , the voltage supplied by the power supply 400 to the heating element 330 increases, the heat generated by the heating element 330 increases, and the temperature of the hot air flow increases. The voltage supplied by the power supply 400 to the heating element 330 decreases, the heat generated by the heating element 330 decreases, and the temperature of the hot air flow decreases.

[0050] The temperature detection element 500 is in a thermal equilibrium state. When the temperature detection element 500 is in a thermal equilibrium state, the resistance value remains unchanged. At this time, the temperature of the temperature detection element 500 is the thermal equilibrium temperature value Tp. Figure 6 When the device is in normal working state, the motor 310 drives the fan 320 to rotate, the heating element 330 is powered on to generate heat and the temperature of the heating element 330 gradually increases. As the temperature of the heating element 330 increases, the temperature of the temperature detection element 500 slowly rises to the thermal equilibrium temperature value Tp and maintains it.

[0051] Combination Figure 5 , Figure 7When the air outlet 340 of the device is blocked, resulting in the inability to discharge the hot air flow, or the motor 310 fails and cannot drive the fan 320 to rotate to form the hot air flow, the temperature of the hot air component 300 rises, and the temperature of the temperature detection element 500 also rises from Ta to Tb within the first time interval Δt1. At this time, the control module 200 determines that the device has a temperature abnormality based on the temperature rise ΔT1 of the temperature detection element 500 (ΔT1 = Tb-Ta). In order to avoid misjudgment, the control module 200 starts the countdown. During the countdown, the power supply 400 continues to supply power to the heating element 330. If the temperature abnormality is resolved in time, the heat of the hot air component 300 is discharged in time, the temperature of the heating element 330 decreases, and the temperature of the temperature detection element 500 decreases accordingly and returns to the thermal equilibrium temperature value Tp. If the temperature abnormality is not resolved in time, the heat of the heating element 330 still cannot be discharged, the temperature of the heating element 330 increases, and the temperature of the temperature detection element 500 increases accordingly and increases from Tb to Tc within the second time interval Δt2. At this time, the control module 200 determines that the temperature abnormality of the device continues based on the temperature rise ΔT2 (ΔT2=Tc-Tb) of the temperature detection element 500, and the control module 200 commands the power supply 400 to stop supplying power to the heating element 330, and the heating element 330 stops heating.

[0052] If the temperature anomaly persists after the heating element 330 stops heating, the heat generated by the voltage divider element 390 will cause the temperature of the temperature detection element 500 to rise to the thermal equilibrium temperature value Tp. In this process, if the actual temperature value of the temperature detection element 500 exceeds the thermal equilibrium temperature value Tp, the control module 200 determines that the temperature anomaly persists according to the temperature signal fed back by the temperature detection element 500, and the control module 200 obtains the actual temperature value of the temperature detection element 500 in real time and records the maximum actual temperature value Tmax. If the temperature drop of the temperature detection element 500 from the maximum actual temperature value Tmax within the third time interval Δt3 reaches ΔT3 (ΔT3 = Td-Te), the control module 200 determines that the temperature anomaly is resolved according to the temperature signal fed back by the temperature detection element 500, and the control module 200 commands the power supply element 400 to supply power to the heating element 330.

[0053] In this embodiment, ΔT1 (ΔT1=Tb-Ta) is 2°C to 5°C, and Δt1 is 2s to 4s. Specifically, ΔT1 is set to 3°C, and Δt1 is set to 3s.

[0054] In this embodiment, ΔT2 (ΔT2=Tc-Tb) is 2°C to 5°C, and Δt2 is 2s to 4s. Specifically, ΔT2 is set to 3°C, and Δt2 is set to 3s.

[0055] In this embodiment, ΔT3 (ΔT3=Td-Te) is 3°C to 6°C, and Δt3 is 1s to 3s. Specifically, ΔT3 is 5°C, and Δt3 is 2s.

[0056] Assuming that the thermal equilibrium temperature value Tp of the temperature detection element 500 is 80°C, when the temperature of the temperature detection element 500 rises from 80°C (Ta) to 83°C (Tb) or above 83°C within 3s (Δt1), the control module 200 determines that a temperature abnormality has occurred in the device based on the temperature signal of the temperature detection element 500, and the control module 200 starts a countdown of 3s (Δt2). If the temperature of the temperature detection element 500 continues to rise from 83°C (Tb) to 86°C (Tc) or above 86°C within 3s (Δt2), the control module 200 determines that a temperature abnormality has indeed occurred in the device, and the control module 200 commands the power supply 400 to stop supplying power to the heating element 330. Assuming that the maximum actual temperature value Tmax of the temperature detection element 500 is 90°C when a temperature abnormality occurs, when the temperature detection element 500 drops from 90°C (Tmax / Td) to 85°C (Te) or below 85°C within 2s (Δt3), the control module 200 determines that the temperature abnormality is resolved based on the temperature signal of the temperature detection element 500, and the control module 200 can command the power supply 400 to continue to supply power to the heating element 330.

[0057] It is understandable that the thermal equilibrium temperature value Tp of the temperature detection element 500 may also be set to other reasonable values ​​such as 78°C, 79°C, 81°C, 82°C, 83°C, 84°C, 85°C, 86°C, 87°C, etc.

[0058] The temperature anomaly processing method provided in this embodiment can greatly improve the accuracy of the judgment by judging whether the device actually has a temperature anomaly based on the two dynamic temperature rise signals of the temperature detection element 500. When the temperature anomaly does not actually occur, the heating element 330 heats normally, which can ensure the heating efficiency and the working effect of the device.

[0059] In this embodiment, the hot air gun is provided with an indicator for indicating abnormal temperature conditions. The indicator can remind the user by flashing an indicator light, by flashing an abnormal temperature signal on a display screen, or by other reasonable means such as sound.

[0060] It is understandable that the power supply 400 of the hot air heating device can be powered by a battery or connected to a mains supply. When the hot air heating device is powered by a battery, the battery can be detachably mounted on the bottom of the handle 110 via a battery holder.

[0061] It is understandable that Δt1 may also be set to other reasonable durations such as 2s, 2.5s, 3.5s, or 4s.

[0062] It is understandable that ΔT1 (ΔT1=Tb-Ta) may also be set to other reasonable values ​​such as 2°C, 2.5°C, 3.5°C, 4°C, 4.5°C, 5°C, etc.

[0063] It is understandable that Δt2 may also be set to other reasonable durations such as 2s, 2.5s, 3.5s, or 4s.

[0064] It is understandable that ΔT2 (ΔT2=Tc-Tb) may also be set to other reasonable values ​​such as 2°C, 2.5°C, 3.5°C, 4°C, 4.5°C, 5°C, etc.

[0065] It is understandable that Δt3 may also be set to other reasonable durations such as 1s, 1.2s, 1.5s, 1.7s, 2.1s, 2.3s, 2.5s, 2.7s, 3s, etc.

[0066] It is understandable that ΔT3 (ΔT3=Td-Te) may also be set to other reasonable values ​​such as 3°C, 3.5°C, 4°C, 4.5°C, 5.5°C, 6°C, etc.

[0067] It is understandable that the hot air heating device can also be other devices for outputting hot air flow, such as a hair dryer. Accordingly, the specific structure of the hot air component 300 is not limited to the above description and drawings, and can be determined according to the specific type of the device.

[0068] It is understandable that in order to avoid installation hazards caused by overheating of the device, a fuse can be connected in series in the power circuit of the heating element 330. When the temperature of the heating element 330 reaches a preset safety heating value, the fuse blows, disconnecting the power circuit of the heating element 330.

[0069] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art may make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A method for handling temperature anomalies in a hot air heating device, the hot air heating device comprising a housing, a control module, a hot air component arranged in the housing, a power supply for powering and a temperature detection element for detecting the heating temperature, the hot air component comprising a motor, a fan driven by the motor and a heating element that generates heat when powered on, the motor drives the fan to rotate to send the heat generated by the heating element out of the housing through an air outlet to form a hot air flow for heating an object, the power supply, the motor and the heating element are all controlled by the control module, the temperature detection element signal is connected to the control module, and the characteristics are as follows: The temperature anomaly processing method comprises the following steps: Step S100, if the temperature rise of the temperature detection element within the first time interval Δt1 reaches ΔT1, the control module determines that a temperature anomaly occurs according to the temperature signal fed back by the temperature detection element, and executes step S200; Step S200, the control module starts the countdown. If the temperature rise of the temperature detection element reaches ΔT2 within the second time interval Δt2, the control module determines that the temperature abnormality persists according to the temperature signal fed back by the temperature detection element, and executes step S300; Step S300: The control module executes a protection program.

2. The temperature anomaly processing method according to claim 1, characterized in that: The protection program executed by the control module is to instruct the power supply component to stop supplying power to the heating component.

3. The temperature anomaly processing method according to claim 1, characterized in that: The temperature anomaly processing method further includes step S400: Step S400: If the temperature drop of the temperature detection element within the third time interval Δt3 reaches ΔT3, the control module determines that the temperature anomaly is resolved according to the temperature signal fed back by the temperature detection element and instructs the power supply element to supply power to the heating element.

4. The temperature anomaly processing method according to claim 3, characterized in that: The temperature detection element has a thermal equilibrium temperature value Tp. In step S400, if the actual temperature value of the temperature detection element exceeds the thermal equilibrium temperature value Tp, the control module determines that the temperature anomaly persists based on the temperature signal fed back by the temperature detection element. The control module obtains the actual temperature value of the temperature detection element in real time and records the maximum actual temperature value Tmax. If the temperature drop of the temperature detection element from the maximum actual temperature value Tmax within a third time interval Δt3 reaches ΔT3, the control module determines that the temperature anomaly is resolved based on the temperature signal fed back by the temperature detection element.

5. The temperature anomaly processing method according to claim 1, characterized in that: The temperature detection element is used to detect the temperature of the heating element.

6. The method for handling temperature anomaly according to claim 5, characterized in that: The temperature detection element is arranged between the motor and the heating element.

7. The temperature anomaly processing method according to claim 1, characterized in that: A voltage dividing element is connected in series to the power connection circuit of the motor.

8. The method for handling temperature anomaly according to claim 1, characterized in that: ΔT1 is 2° C. to 5° C.; and / or, the first time interval Δt1 is 2s to 4s.

9. The method for handling temperature anomaly according to claim 1, characterized in that: ΔT2 is 2° C. to 5° C.; and / or, the second time interval Δt2 is 2s to 4s.

10. The method for handling temperature anomaly according to claim 3, characterized in that: ΔT3 is 3° C. to 6° C.; and / or, the second time interval Δt3 is 1s to 3s.

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