CN-121985437-A - Wide-voltage self-adaptive heating system, control method thereof and heating electric appliance

CN121985437ACN 121985437 ACN121985437 ACN 121985437ACN-121985437-A

Abstract

The application relates to a wide-voltage self-adaptive heating system, a control method thereof and a heating appliance, wherein the wide-voltage self-adaptive heating system comprises a voltage identification module connected with an external power supply, a control module connected with the voltage identification module, a switch module connected with the control module and a heating module respectively connected with the switch module and the control module, wherein the control module outputs control signals according to voltage detection signals, a first switch element, a second switch element and a third switch element in the switch module respectively respond to the control signals so as to perform closing operation or opening operation, and the heating module presents a serial topology structure or a parallel topology structure under the actions of the first switch element, the second switch element and the third switch element so as to maintain the output power or the temperature basically unchanged and realize normal work under different standard power supply voltages.

Inventors

LI JIQIAN
HU GUANGYAO

Assignees

湖南生生科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260225

Claims (16)

1. A wide voltage adaptive heating system, comprising: The voltage identification module is connected with an external power supply, and is used for identifying the output voltage of the external power supply and outputting a voltage detection signal; The control module is connected with the voltage identification module and is used for outputting a control signal according to the voltage detection signal; The switch module comprises a first switch element, a second switch element and a third switch element which are respectively connected with the control module, and the first switch element, the second switch element and the third switch element are respectively responsive to the control signals to conduct closing operation or opening operation, wherein one end of the first switch element, one end of the second switch element and one end of the third switch element are respectively connected with the external power supply; The control end of the heating module is connected with the control module, the first end of the heating module is connected with the other end of the first switching element, the second end of the heating module is connected with the other end of the second switching element, the third end of the heating module is connected with the other end of the third switching element, and the heating module is used for presenting a serial topology structure or a parallel topology structure under the actions of the first switching element, the second switching element and the third switching element.
2. The wide voltage adaptive heating system of claim 1, wherein the heat generating module comprises: one end of the first heating unit is connected with the other end of the first switching element, and the other end of the first heating unit is connected with the other end of the second switching element; and one end of the second heating unit is respectively connected with the other end of the first heating unit and the other end of the second switching element, and the other end of the second heating unit is connected with the other end of the third switching element.
3. The wide voltage adaptive heating system of claim 2, wherein the first heating unit comprises: one end of the first heating element is connected with the other end of the first switch element; one end of the normally-closed temperature control switch is connected with the other end of the first heating element, and the other end of the normally-closed temperature control switch is connected with the other end of the second switching element; The second heat generating unit includes: one end of the second heating element is respectively connected with the other end of the normally-closed temperature control switch and the other end of the second switching element; and one end of the thermal fuse is connected with the other end of the second heating element, and the other end of the thermal fuse is connected with the other end of the third switching element.
4. The wide voltage adaptive heating system of claim 3, wherein the resistance of the first heating element and the resistance of the second heating element are equal.
5. The wide voltage adaptive heating system of claim 3, wherein the normally closed temperature controlled switch operates at a temperature of 110 ℃ to 130 ℃.
6. The wide voltage adaptive heating system of claim 3, wherein surfaces of the first and second heating elements are coated with a graphene-based composite coating.
7. The wide voltage adaptive heating system of claim 1, wherein the voltage identification module comprises: the voltage division network is connected with the external power supply and is used for carrying out voltage division sampling on the voltage output by the external power supply; the rectification filter circuit is connected with the voltage division network and is used for carrying out rectification filter treatment on the voltage subjected to voltage division sampling; The voltage comparator is connected with the rectifying and filtering circuit and the control module respectively, and is used for comparing preset voltage and voltage after rectifying and filtering treatment and outputting the voltage detection signal.
8. The wide voltage adaptive heating system of claim 1, wherein the first switching element, the second switching element, and the third switching element are all optocoupler isolated triac or solid state relay.
9. The wide-voltage adaptive heating system of claim 1, the wide-voltage self-adaptive heating system is characterized by further comprising: The temperature detection module is connected with the control module and is used for detecting the temperature of the heating module and outputting a temperature signal to the control module.
10. The wide-voltage adaptive heating system of claim 1, the wide-voltage self-adaptive heating system is characterized by further comprising: The heat dissipation module is used for dissipating heat; The driving module is respectively connected with the heat dissipation module and the control module, and is used for responding to the starting signal output by the control module before the control module outputs the control signal to drive the heat dissipation module to start.
11. A control method of a wide-voltage adaptive heating system, characterized by being applied to a control module in the wide-voltage adaptive heating system according to any one of claims 1 to 10, the method comprising: Determining a threshold interval in which the output voltage of the external power supply is located based on the received voltage detection signal; When the output voltage is in a first threshold value interval, outputting a first control signal, wherein the first control signal is used for respectively indicating a first switching element, a second switching element and a third switching element to perform a closing operation or an opening operation so that the heating module presents a series topology structure under the action of the first switching element, the second switching element and the third switching element; When the output voltage is in a second threshold interval, outputting a second control signal, wherein the second control signal is used for respectively indicating the first switching element, the second switching element and the third switching element to conduct closing operation or opening operation so that the heating module presents a parallel topology structure under the action of the first switching element, the second switching element and the third switching element, and the first threshold interval is larger than the second threshold interval.
12. The method of claim 11, wherein the method further comprises: Outputting the first control signal or the second control signal when the zero crossing point of the output voltage is detected; and after the first control signal or the second control signal is output, entering a power-off dead zone, and continuously outputting the first control signal or the second control signal until the power-off dead zone is finished.
13. The method of claim 11, wherein the first threshold interval is greater than 150 volts and the second threshold interval is less than or equal to 150 volts.
14. The method of claim 11, wherein the method further comprises: and outputting a PWM signal to the heating module, wherein the PWM signal is used for indicating the heating module to adjust the temperature of the heating module.
15. The method of claim 11, wherein the method further comprises: and monitoring working parameters of the heating module in real time, and outputting an alarm signal and cutting off a power supply if the working parameters are not in a preset range, wherein the working parameters comprise temperature and working current.
16. A heating appliance comprising a wide voltage adaptive heating system as claimed in any one of claims 1 to 10.

Description

Wide-voltage self-adaptive heating system, control method thereof and heating electric appliance Technical Field The application relates to the technical field of electrical equipment, in particular to a wide-voltage self-adaptive heating system, a control method thereof and a heating electrical appliance. Background The existing heating appliances, such as hair dryers, warm air blowers, water heaters or infrared physiotherapy instruments, generally adopt a heating element with fixed impedance to generate heat, however, because standard power supply voltages in different places are different, the temperature or output power of the heating appliances fluctuates greatly under different standard power supply voltages, and large use restrictions exist. Disclosure of Invention In view of the foregoing, it is desirable to provide a wide-voltage adaptive heating system capable of operating normally under different standard power supply voltages, a control method thereof, and a heating appliance. In a first aspect, the present application provides a wide voltage adaptive heating system comprising: The voltage identification module is connected with an external power supply, and is used for identifying the output voltage of the external power supply and outputting a voltage detection signal; the control module is connected with the voltage identification module and is used for outputting a control signal according to the voltage detection signal; The switch module comprises a first switch element, a second switch element and a third switch element which are respectively connected with the control module, wherein the first switch element, the second switch element and the third switch element respectively respond to control signals to conduct closing operation or opening operation, and one end of the first switch element, one end of the second switch element and one end of the third switch element are respectively connected with an external power supply; The control end of the heating module is connected with the control module, the first end of the heating module is connected with the other end of the first switching element, the second end of the heating module is connected with the other end of the second switching element, the third end of the heating module is connected with the other end of the third switching element, and the heating module is used for presenting a serial topology structure or a parallel topology structure under the actions of the first switching element, the second switching element and the third switching element. In one embodiment, a heat generating module includes: one end of the first heating unit is connected with the other end of the first switching element, and the other end of the first heating unit is connected with the other end of the second switching element; And one end of the second heating unit is respectively connected with the other end of the first heating unit and the other end of the second switching element, and the other end of the second heating unit is connected with the other end of the third switching element. In one embodiment, the first heating unit includes: one end of the first heating element is connected with the other end of the first switching element; One end of the normally-closed temperature control switch is connected with the other end of the first heating element, and the other end of the normally-closed temperature control switch is connected with the other end of the second switching element; the second heat generating unit includes: One end of the second heating element is respectively connected with the other end of the normally-closed temperature control switch and the other end of the second switching element; and one end of the thermal fuse is connected with the other end of the second heating element, and the other end of the thermal fuse is connected with the other end of the third switching element. In one embodiment, the resistance of the first heating element is equal to the resistance of the second heating element. In one embodiment, the operating temperature of the normally closed temperature controlled switch is 110 ℃ to 130 ℃. In one embodiment, the surfaces of the first and second heating elements are coated with a graphene-based composite coating. In one embodiment, the voltage identification module comprises: the voltage division network is connected with an external power supply and used for carrying out voltage division sampling on the voltage output by the external power supply; the rectification filter circuit is connected with the voltage division network and is used for carrying out rectification filter treatment on the voltage subjected to the voltage division sampling; the voltage comparator is respectively connected with the rectification filter circuit and the control module, and is used for comparing preset voltage with voltage subjected to rectification filter processing and outputting a voltage detection signal. In one em