CN107947683B - Control circuit, hairdryer and physiotherapy equipment based on motor - Google Patents
Control circuit, hairdryer and physiotherapy equipment based on motor Download PDFInfo
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- CN107947683B CN107947683B CN201711147858.0A CN201711147858A CN107947683B CN 107947683 B CN107947683 B CN 107947683B CN 201711147858 A CN201711147858 A CN 201711147858A CN 107947683 B CN107947683 B CN 107947683B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
Abstract
The invention relates to a control circuit based on a motor, an electric hair drier and a physiotherapy device, comprising: the heating device comprises a motor unit, a first switch unit, a heating unit and a second switch unit, wherein the motor unit comprises a motor, and the first switch unit comprises a first switch and a second switch; when the motor receives a motor operation control signal transmitted by a motor control line and a low-voltage signal output by the first switch, the motor starts to operate and outputs a switch control signal to the control end of the second switch unit, and the second switch unit conducts the input end of the second switch unit with the output end of the second switch unit according to the switch control signal; when the input end and the output end of the second switch unit are conducted and receive the high-voltage signal output by the second switch, the heating unit starts to heat. The control circuit of the motor can start the heating function only after the motor is started, and therefore thermal failure and safety accidents caused by lack of an air cooling system are effectively avoided.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a control circuit based on a motor, an electric hair drier and physiotherapy equipment.
Background
The motor consists of a motor main body and a driver, and is a product capable of automatically controlling operation. The motor has been widely used in various products due to its advantage of strong controllability, for example, in an electric hair dryer, the motor can be used to control the rotation speed of the fan impeller, so as to adjust the wind speed of the electric hair dryer. However, most of the existing electric hair dryers have the functions of adjusting hot air and cold air, wherein the function of adjusting the electric hair dryer is mainly completed by two multi-throw switches, specifically, one of the switches supplies power to the motor to form a low wind gear and a high wind gear of the motor (fan); the on and off of the heating wire is controlled by the other switch to form the hot air low grade and the hot air high grade of the heating wire. Although the control mode is simple and convenient, in the practical application process, the heating wire always starts to generate heat when the fan does not rotate, so that safety accidents are often caused.
Disclosure of Invention
Therefore, it is necessary to provide a control circuit based on a motor to solve the problem that the control mode of the control circuit of the existing hair dryer often causes the fan and the heating wire to work at the same time, which is easy to cause safety accidents.
A control circuit based on a motor comprises a motor unit, a first switch unit, a heating unit and a second switch unit, wherein the motor unit comprises the motor, and the first switch unit comprises a first switch and a second switch;
the first winding output end, the second winding output end and the third winding output end of the motor are respectively used for being connected with correspondingly arranged motor control lines, and the first winding output end is respectively connected with the output end of the first switch and the control end of the second switch unit; the output end of the third winding is grounded;
the input end of the first switch is used for connecting a low-voltage power supply;
the input end of the second switch is used for being connected with one end of a high-voltage power supply, the output end of the second switch is connected with the input end of the second switch unit through the heating unit, and the output end of the second switch unit is used for being connected with the other end of the high-voltage power supply;
when the motor receives a motor operation control signal transmitted by the motor control line and a low-voltage signal output by the first switch, the motor starts to operate and outputs a switch control signal to the control end of the second switch unit, and the second switch unit switches on the input end of the second switch unit and the output end of the second switch unit according to the switch control signal;
and when the input end and the output end of the second switch unit are conducted and the heating unit receives the high-voltage signal output by the second switch, the heating unit starts to heat.
The motor-based control circuit of the present invention comprises: the motor unit comprises a motor, a first switch unit, a heating unit and a second switch unit, wherein the motor unit comprises a motor, and the first switch unit comprises a first switch and a second switch. The motor comprises a plurality of winding output ends, wherein the plurality of winding output ends are respectively connected with corresponding motor control lines, the first winding output end is connected with the output end of the first switch, the second winding output end is connected with the control end of the second switch unit, and the input end of the first switch is connected with the low-voltage power supply; the input end of the second switch is connected with one end of the high-voltage power supply, the output end of the second switch is connected with one end of the second switch unit through the heating unit, and the other end of the second switch unit is grounded with the other end of the high-voltage power supply; when the motor receives the operation control signal and the low-voltage signal of the output end of each winding, the motor starts to operate and controls the input end and the output end of the second switch unit to be closed; when the input end and the output end of the second switch unit are controlled and a high voltage signal is provided, a circuit where the heating unit is located is conducted, so that the heating unit starts to generate heat. The control circuit based on the motor can start the heating function only after the motor is started (the motor is started and mainly used for driving the fan or other heat dissipation equipment to rotate, and when the motor is started, the fan rotates), so that thermal failure and safety accidents caused by lack of an air cooling system are effectively avoided.
According to the control circuit based on the motor, the invention further provides electronic equipment.
An electric hair dryer includes a motor-based control circuit.
The blower adopts the control circuit based on the motor, so that when the blower uses a hot air function, the heating unit can be heated after the motor is started (the motor is started to drive the fan in the blower to rotate), and the thermal failure and safety accidents caused by lack of an air cooling system are effectively avoided.
According to the control circuit based on the motor, the invention further provides electronic equipment.
A physiotherapeutic device includes a motor-based control circuit.
The physiotherapy equipment adopts the control circuit based on the motor, so that when a user uses the physiotherapy equipment, the heating unit can heat after the motor is started (the motor is started to drive the fan or the heat dissipation equipment in the hair drier to rotate), and thermal failure and safety accidents caused by lack of an air cooling system are effectively avoided.
Drawings
FIG. 1 is a schematic diagram of a motor-based control circuit according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a motor-based control circuit according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a motor-based control circuit according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a motor-based control circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to preferred embodiments and the accompanying drawings. It is clear that the examples described below are only illustrative of the invention and do not limit it. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, for the convenience of description, only some but not all of the matters related to the present invention are shown in the drawings.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, the terms "first", "second", "third" and "fourth" are used herein only for distinguishing the described objects, and are not intended to limit the objects.
As shown in fig. 1, a motor-based control circuit, as shown in fig. 1, includes a motor unit 10, a first switch unit 20, a heat generating unit 30, and a second switch unit 40, the motor unit 10 including a motor 11, the first switch unit 20 including a first switch 21 and a second switch 22; a first winding output end, a second winding output end and a third winding output end of the motor 11 are respectively used for connecting correspondingly arranged motor control lines, and the first winding output end is respectively connected with an output end of the first switch 21 and a control end of the second switch unit 40; the output end of the third winding is grounded; the input end of the first switch 21 is used for connecting a low-voltage power supply; the input end of the second switch 22 is used for connecting one end of a high voltage power supply, the output end of the second switch 22 is connected with the input end of the second switch unit 40 through the heating unit 30, and the output end of the second switch unit 40 is used for connecting the other end of the high voltage power supply.
When the motor receives a motor operation control signal transmitted by a motor control line and a low-voltage signal output by the first switch, the motor starts to operate and outputs a switch control signal to the control end of the second switch unit, and the second switch unit conducts the input end of the second switch unit with the output end of the second switch unit according to the switch control signal; when the input end and the output end of the second switch unit are conducted and receive the high-voltage signal output by the second switch, the heating unit starts to heat.
An Electric machine (also known as "motor") refers to an electromagnetic device that converts or transmits Electric energy according to the law of electromagnetic induction. The main function of the device is to generate driving torque, and the driving torque is used as a power source of electrical appliances or various machines and is converted into mechanical energy by utilizing electric energy.
Alternatively, the motor may be a brushless motor. The motor mainly comprises a motor body, a position sensor and an electronic switch circuit, wherein the electronic switch circuit is composed of a power logic switch unit and a position sensor signal processing unit. The motor detects signals of the real-time running position of the winding through the position sensor, the collected signals are processed through the position processing unit, and the corresponding driving circuit is controlled in real time to control the motor winding, so that the rotating speed of the motor is controlled, and the rotating speed of the motor can be changed by changing the current output to the motor.
The above-described motor-based control circuit includes a motor unit 10, a first switch unit 20, a heat generating unit 30, and a second switch unit 40, wherein the motor unit 10 includes a motor 11, and the first switch unit 20 includes a first switch 21 and a second switch 22. The motor 11 comprises a plurality of winding output ends, wherein the plurality of winding output ends are respectively connected with corresponding motor control lines, the first winding output end is connected with the output end of the first switch 21, the second winding output end is connected with the control end of the second switch unit 40, and the input end of the first switch 21 is connected with a low-voltage power supply; the input end of the second switch 22 is connected with one end of the high-voltage power supply, the output end of the second switch 22 is connected with one end of the second switch unit 40 through the heating unit, and the other end of the second switch unit 40 is grounded with the other end of the high-voltage power supply; when the motor 11 receives the operation control signal and the low voltage signal at the output end of each winding, the operation is started, and the input end and the output end of the second switch unit 40 are controlled to be closed; when the input and output terminals of the second switching unit 40 are controlled and a high voltage signal is supplied, a circuit in which the heat generating unit 30 is located is turned on, thereby causing the heat generating unit 30 to start generating heat. The control circuit based on the motor can start the heating function only after the motor 11 is started (the motor 11 is started and mainly used for driving the fan or other heat dissipation equipment to rotate, and when the motor 11 is started, the fan rotates), so that the heat failure and safety accidents caused by lack of an air cooling system are effectively avoided.
In one embodiment, as shown in fig. 2, the second switching unit 40 is a relay 41; the output end of the first winding is respectively connected with the output end of the first switch 21 and one end of the coil of the relay 41; the other end of the coil of the relay 41 is grounded; the input end of the second switch 22 is used for connecting one end of a high voltage power supply, the output end of the second switch 22 is connected with one end of a contact of the relay 41 through the heating unit 30, and the other end of the contact of the relay 41 is used for connecting the other end of the high voltage power supply.
When the motor 11 receives the motor operation control signal transmitted by the motor control line and the low voltage signal output by the first switch 21, the motor 11 starts to operate and outputs a relay control signal to the relay 41, and the relay 41 is closed according to the relay control signal. When the relay 41 is closed and receives the high voltage signal output from the second switch 22, the heat generating unit 30 starts generating heat.
A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The relay is composed of two parts, namely a coil and a contact set, so that the graphic symbol of the relay in the circuit diagram also comprises two parts: one long square represents a coil; a set of contact symbols represents a combination of contacts.
The motor-based control circuit includes: the second switch unit 40 is a relay 41, and the output end of the first winding is respectively connected with the output end of the first switch 21 and one end of the coil of the relay 41; the other end of the coil of the relay 41 is grounded; the input end of the second switch 22 is used for connecting one end of a high-voltage power supply, the output end of the second switch 22 is connected with one end of a contact of the relay 41 through the heating unit 30, and the other end of the contact of the relay 41 is used for connecting the other end of the high-voltage power supply; when the motor 11 receives the operation control signal and the low voltage signal at the output end of each winding, the operation is started, and the relay 41 is controlled to be closed; when the relay 41 is closed and a high voltage signal is supplied, the circuit in which the heat generating unit 30 is located is turned on, thereby causing the heat generating unit 30 to start generating heat. The above-mentioned control circuit based on motor can start the function of generating heat only after the motor 11 starts (the motor 11 starts and is mainly used for driving the fan to rotate, when the motor 11 starts, the fan will rotate), the heating unit 30 can start the function of generating heat, has avoided effectively because of lacking the thermal failure and incident that the air-cooled system causes.
In one embodiment, as shown in fig. 3, the motor unit 10 further includes a first diode D1 and a resistance unit 12. The first switch 21 comprises at least two outputs. The first winding output is connected to a first output of the first switch 21.
Or the first winding output end is connected with the second output end of the first switch 21 through a first diode D1, wherein the first winding output end is connected with the cathode of a first diode D1; the output end of the second winding is connected with one end of the resistance unit 12; the output end of the third winding is grounded. One end of the resistance unit 12 is connected to the second output end of the first switch 21, and the other end of the resistance unit 12 is grounded; when the motor 11 receives the motor operation control signal transmitted by the motor control line and the low voltage signal output by the first output terminal of the first switch 21, the motor 11 is started and operates at a high speed. When the motor 11 receives the motor operation control signal transmitted by the motor control line and the low voltage signal output by the second output terminal of the first switch 21, the motor 11 is started and operates at a low speed.
Specifically, the first switch 21 has at least two output terminals, wherein a first output terminal is directly connected to the first winding output terminal of the motor 11, a second output terminal is connected to the first winding output terminal of the motor 11 through the first diode D1, and is connected to the second winding output terminal of the motor 11 through the resistance unit 12, wherein the input terminal of the first switch 21 is used for connecting a low voltage power supply, and the low voltage power supply mainly provides a working voltage for the motor 11. When the operating voltage is supplied to the motor 11 through the first output terminal of the first switch 21 (i.e., the low voltage power supply is directly conducted to the first winding output terminal), the motor 11 is started and operates at a high speed. When the operating voltage is supplied to the motor 11 through the second output terminal of the first switch 21 (i.e., the low-voltage power is conducted to the first winding output terminal through the first diode D1), the motor 11 is started and operates at a low speed. When the rotation speed of the motor 11 is changed, it is possible to change the operation state of the equipment driven by the motor 11, etc., for example, the rotation speed of the fan may be changed, thereby forming different wind speeds.
In one embodiment, as shown in fig. 3, the motor-based control circuit further comprises: a second diode D2; the second switch 22 comprises at least two outputs; the first output terminal of the second switch 22, the heat generating unit 30 and the contact of the relay 41 are connected in sequence.
Or the second output terminal of the second switch 22 is connected to the contact of the relay 41 sequentially through the second diode D2 and the heat generating unit 30, and the output terminal of the second switch 22 is connected to the anode of the second diode D2.
At high or low speed operation of the motor 11:
when the heating unit 30 receives the high voltage signal outputted from the first output terminal of the second switch 22, the heating unit 30 starts high power heating.
When the heating unit 30 receives the high voltage signal outputted from the second output terminal of the second switch 22, the heating unit 30 starts low power heating.
Specifically, the second switch 22 has at least two output terminals, wherein a first output terminal is directly connected to one end of the heating unit 30, and the other end of the heating unit 30 is connected to a contact of the relay 41; the second output end is connected with one end of the heating unit 30 through a second diode D2, and the other end of the heating unit 30 is connected with the contact of the relay 41; the input terminal of the second switch 22 is used for connecting a high voltage power supply, and the high voltage power supply mainly provides the working voltage for the heating unit 30. When the first output terminal of the second switch 22 provides the operating voltage to the heat generating unit 30 (i.e. directly connects the high voltage power supply to the heat generating unit 30), and the motor 11 is started, the heat generating unit 30 starts high power heating. When the operating voltage is supplied to the heating unit 30 through the second output terminal of the second switch 22 (i.e., the high-voltage power is conducted to the heating unit 30 through the second diode D2), and the motor 11 is started, the heating unit 30 starts low-power heating. The heating power of the heating unit 30 can be selected by the structure, a user can conveniently select proper power in actual work, and the heating unit 30 can be started to generate heat only after the motor 11 is started, so that overheating faults and safety accidents are avoided.
In one embodiment, as shown in fig. 4, the resistor unit 12 further includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is grounded, and the other end of the first resistor R1 is connected to the second winding output terminal and is connected to the second output terminal of the first switch 21 through the second resistor R2. When the motor 11 is connected with the low-voltage power supply through the first diode D1, instability of voltage input to the motor 11 is easily caused, the current can be limited to the circuit by using the first resistor and the second resistor, and stability of the whole circuit system is effectively guaranteed.
In one embodiment, as shown in fig. 3, the motor-based control circuit further includes a third diode D3, the anode of the third diode D3 is grounded, and the cathode of the third diode D3 is connected to the first winding output terminal. The third diode D3 is used mainly for protection of the relay 41, thereby ensuring safety of the circuit.
In one embodiment, the first switch 21 and the second switch 22 are multi-position switches.
In particular, a multi-position switch is a switch that can be turned on or off by selection of a plurality of positions. Wherein the first switch 21 and the second switch 22 can both select a multi-position switch, select a high-speed or low-speed operation of the motor 11 by using the multi-position switch, and control the high-power or low-power heating of the heating unit 30. For example, the first switch 21 selects a switch with two gears, and when the switch is turned to the first gear, the first output terminal of the first switch 21 provides the operating voltage for the motor 11 (i.e. directly connects the low-voltage power supply to the output terminal of the first winding), the motor 11 is started and operates at a high speed. When the switch is turned to the second position and the second output terminal of the first switch 21 provides the operating voltage for the motor 11 (i.e., the low voltage power is conducted to the first winding output terminal through the first diode D1), the motor 11 is started and operates at a low speed.
In one embodiment, the heat generating unit 30 includes a heat generating wire.
Specifically, the heating unit 30 may be a heating wire or a heating sheet, and the heating wire is connected between the first output terminal of the second switch 22 and the contact of the relay 41; or the heating wire is connected between the second diode D2 and the contact of the relay 41; the number of the heating wires can be multiple, according to the working voltage and power condition of the heating wires, the heating wires are connected in series and parallel and then connected between the first output end of the second switch 22 and the contact of the relay 41 or between the second diode D2 and the contact of the relay 41, and when the motor 11 is started and receives a high-voltage signal, the heating wires start to generate heat. The heating wire is utilized to generate heat so as to form hot air, and the use is very convenient.
Alternatively, the heating wire can be replaced by a heating plate, wherein the heating plate is arranged in the same manner as the heating wire, and the same effect as the heating wire can also be achieved.
In one embodiment, the low voltage power supply has a voltage of 12V.
Specifically, a low voltage is generally adopted in the dc motor as the operating voltage of the motor. In this embodiment, a voltage of 12V is used. Alternatively, the voltage of the low voltage power supply may be 24V or 48V. The voltage can ensure normal and safe operation of the motor.
In one embodiment, the voltage of the high voltage power supply is 220V.
In the present embodiment, a high voltage is mainly used as the operating voltage of the heating unit (heating wire or heating sheet). Utilize 220V voltage as the operating voltage of the heating unit can guarantee that the heating unit produces heat fast on the one hand, on the other hand can prevent to produce overheated trouble, reduces the incident and produces.
According to the control circuit based on the motor, the invention also provides an electric hair drier.
An electric hair dryer comprising the motor-based control circuit of any one of the embodiments, wherein the motor-based control circuit is disposed inside the electric hair dryer.
The control circuit based on the motor is adopted in the electronic equipment, so that the heating unit can heat the hair drier after the motor is started (the motor is started to drive the fan in the hair drier to rotate) when the hair drier uses a hot air function, and the heat failure and the safety accident caused by lack of an air cooling system are effectively avoided.
According to the control circuit based on the motor, the invention further provides electronic equipment.
A physiotherapy apparatus comprising a motor-based control circuit according to any one of the embodiments.
The physiotherapy equipment adopts the control circuit based on the motor, so that when a user uses the physiotherapy equipment, the heating unit can heat after the motor is started (the motor is started to drive the fan or the heat dissipation equipment in the hair drier to rotate), and thermal failure and safety accidents caused by lack of an air cooling system are effectively avoided.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A control circuit based on a motor is characterized by comprising a motor unit, a first switch unit, a heating unit and a second switch unit, wherein the motor unit comprises a motor, and the first switch unit comprises a first switch and a second switch;
the second switch unit is a relay;
the first winding output end, the second winding output end and the third winding output end of the motor are respectively used for being connected with correspondingly arranged motor control lines, and the first winding output end is respectively connected with the output end of the first switch and one end of a coil of the relay; the other end of the coil of the relay is grounded; the output end of the third winding is grounded;
the input end of the first switch is used for connecting a low-voltage power supply;
the input end of the second switch is used for being connected with one end of a high-voltage power supply, the output end of the second switch is connected with one end of a contact of the relay through the heating unit, and the other end of the contact of the relay is used for being connected with the other end of the high-voltage power supply;
when the motor receives a motor operation control signal transmitted by the motor control line and a low voltage signal output by the first switch, the motor starts to operate and outputs a relay control signal to the relay, and the relay is closed according to the relay control signal;
when the relay is closed and receives the high-voltage signal output by the second switch, the heating unit starts to heat;
the diode further comprises a second diode; the second switch comprises at least two output ends;
the first output end of the second switch, the heating unit and the contact of the relay are connected in sequence;
or a second output end of the second switch is connected with the contact of the relay sequentially through the second diode and the heating unit, and the output end of the second switch is connected with the anode of the second diode;
when the motor runs at high speed or low speed:
when the heating unit receives the high-voltage signal output by the first output end of the second switch, the heating unit starts high-power heating;
and when the heating unit receives the high-voltage signal output by the second output end of the second switch, the heating unit starts low-power heating.
2. The motor-based control circuit of claim 1, wherein the first switch is a multi-position switch.
3. The motor-based control circuit of claim 2, wherein the motor unit further comprises a first diode and a resistance unit; the first switch comprises at least two output ends;
the first winding output end is connected with the first output end of the first switch; or the second output end of the first switch is connected through the first diode, and the output end of the first winding is connected with the cathode of the first diode; the output end of the second winding is connected with one end of the resistance unit; the output end of the third winding is grounded;
one end of the resistance unit is connected with the second output end of the first switch, and the other end of the resistance unit is grounded;
when the motor receives a motor operation control signal transmitted by the motor control line and a low-voltage signal output by the first output end of the first switch, the motor is started and operates at a high speed;
and when the motor receives a motor operation control signal transmitted by the motor control line and a low-voltage signal output by the second output end of the first switch, the motor is started and operates at a low speed.
4. The motor-based control circuit of claim 3, wherein the second switch is a multi-position switch.
5. The motor-based control circuit of claim 3, wherein the resistance unit comprises a first resistor and a second resistor, one end of the first resistor is grounded, and the other end of the first resistor is connected to the second winding output terminal and is connected to the second output terminal of the first switch through the second resistor.
6. The motor-based control circuit of any of claims 2-5, further comprising: a third diode;
and the anode of the third diode is grounded, and the cathode of the third diode is connected with the output end of the first winding.
7. The motor-based control circuit of claim 6, wherein the heat generating unit comprises a heat wire or a heat blade.
8. An electric hair dryer comprising a motor based control circuit as claimed in any one of claims 1 to 7.
9. A physiotherapeutic device, comprising a motor-based control circuit according to any one of claims 1 to 7.
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| CN201711147858.0A CN107947683B (en) | 2017-11-17 | 2017-11-17 | Control circuit, hairdryer and physiotherapy equipment based on motor |
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| CN107947683B true CN107947683B (en) | 2020-05-08 |
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| CN205568164U (en) * | 2016-04-29 | 2016-09-14 | 武汉大学 | Controllable hairdryer of wind -warm syndrome |
| CN106230420A (en) * | 2016-08-31 | 2016-12-14 | 浙江斯大威电器有限公司 | A kind of hair-dryer voltage adaptive identification circuit |
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