TWM514771U - Brushless DC motor power supply system of hairdryer - Google Patents

Description

DC brushless motor power supply system for hair dryer

A DC brushless motor power supply system for a hair dryer, the electric heater of the hair dryer comprises more than one electric heating wire, directly utilizing the electric heating wire of the electric heater, as a step-down action before the AC power input rectifier, and then providing stability through the rectifier The DC power supply is used for DC brushless motors.

The traditional hair dryer uses the AC motor as the fan source. Since the AC motor is a brush motor, there is a problem of high noise when the hair dryer is used, and it is easy to malfunction due to limited wear life of the carbon brush. Therefore, the hair dryer manufacturing industry has further selected to use a carbonless brush. The DC brushless motor with limited life limit, and the DC brushless motor power supply technology of the known hair dryer is created by using the step-down component to reduce the AC power supply to the required low voltage value, and then through the relevant rectification. Processing of lines, filter lines, etc. to provide DC power to the DC brushless motor. These related technologies are created as known in the publication No. 341435 "DC Brushless Motor Blower", Announcement No. 334654 "Blower Circuit" and Announcement No. 444082 "DC Brushless Motor Blower Control Circuit".

As described above, the publication No. 341435 "DC brushless motor blower" is characterized in that the AC power is passed through a step-by-step switch, a diode, a step switch, and a main heater to form a heating speed control circuit. After the rectifier circuit composed of the pole body and the auxiliary heater, the filter capacitor is connected straight Flow brushless motor fan.

Known Announcement No. 334654 "Blower Circuit", its technical features are: A blower circuit is disclosed, including a heating and rectifying circuit in a blower, and the rectifying circuit is connected to a DC brushless motor fan via a filter circuit. The rectifier circuit is connected to a DC brushless motor fan via a filter circuit and a switching power supply circuit. The heating and rectifying circuit in the hair dryer comprises a cold and hot air switching switch, wherein the cold air switch is connected to the filter circuit via the bridge rectifier circuit; the hot air switch is connected to the cold air switch at one end, and the other end is connected to the heating circuit by the electric wire. The cold air switch is connected to the bridge rectifier circuit via a half wave rectification circuit. The hot air switch is connected to the bridge rectifier circuit via a half wave rectification circuit. The filter circuit is a jumper capacitor. The DC brushless motor fan is single-phase full-wave or two-phase half-wave or three-phase or multi-phase.

Known Announcement No. 444082 "DC Brushless Motor Blower Control Circuit", The technical feature is: a DC brushless motor blower control circuit, comprising: a power module, comprising a power switch, a rectifier and a step-down coil, the two input ends of the rectifier being connected to an AC power source, The power switch is serially connected between one of the input terminals of the rectifier and the AC power source, the step-down coil is connected in series between the other input end of the rectifier and the AC power source; and a speed controller is connected to the output end of the rectifier In order to obtain a DC voltage, and send a speed control signal without a segment or a plurality of segments; a brushless motor is connected, which is connected to the output end of the speed controller and is driven by the speed control signal of the speed controller to generate a corresponding segmentless or Multi-stage speed.

It is known from the above-mentioned prior art creation literature that in order to provide a DC brushless horse To achieve a stable DC power supply, the voltage of the AC power supply must be stepped down by a step-down component (such as a step-down coil), and then processed by other matching lines to provide DC power to the DC brushless motor. It sets the complexity and high cost of the components.

Therefore, how to simplify the power supply of the brushless DC brushless motor, how to reduce Cost is the goal of industrial technology creation that needs to be broken.

The creation of the "DC brushless motor power supply system for hair dryers" includes a heater for more than one piece of electric heating wire, which directly uses the electric heating wire of the electric heater as a step-down action before the input of the AC power input rectifier, and then through the rectifier. Providing a stable DC power supply for DC brushless motors, the purpose of which is to: (1) simplify the DC brushless motor power supply system for hair dryers; (2) reduce the cost of power supply systems for hair dryer DC brushless motors; (3) Effectively improve the practical and economic value of the hair dryer.

The technical creation feature comprises: an AC power source, a power switch, an electric heater, a selection switch, a rectifier and a DC brushless motor; wherein the electric heater has more than one electric heating wire, and the input end of the low temperature electric heating wire of the electric heater and the AC power supply A power switch is connected in series between one end of the electric heater, and the output end of the low temperature electric heating wire of the electric heater is connected to the other end of the alternating current power source via a rectifier, and the output end of the rectifier is connected to the direct current brushless motor, thereby forming an electric heating directly to the electric heater. The wire acts as a step-down action before the AC power input rectifier, and then provides a stable DC power to the DC brushless motor through the rectifier.

Through the creation of the structure, the power supply system of the brushless DC brushless motor and its production cost can be effectively simplified, and the novelty and progress of the power supply system of the DC brushless motor of the hair dryer can be improved.

1‧‧‧Electric heater

11‧‧‧Low temperature electric wire

12‧‧‧Medium temperature heating wire

13‧‧‧High temperature electric heating wire

2‧‧‧DC brushless motor

3‧‧‧Rectifier

4‧‧‧Power switch

5‧‧‧Selection switch

6‧‧‧Fan

7‧‧‧Filter circuit

8‧‧‧Stabilized line

9‧‧‧Safety protection circuit

Figure 1: This creative embodiment.

Figure 2: Another embodiment of the present creation.

Please refer to the figure "Blowing brush DC brushless motor power supply system" shown in Figure 1 of the figure, which includes AC power supply (100V~240V), power switch 4, electric heater 1, selector switch 5, rectifier 3 and DC. Brushless motor 2, fan 6; wherein the electric heater 1 has more than one heating wire (in the embodiment of the present invention, a three-stage electric heating wire is taken as an example), and includes a low-temperature heating wire 11, a medium-temperature electric heating wire 12, and a high temperature. The heating wire 13 is connected in series with a power switch 4 between the input end of the low-temperature heating wire 11 of the electric heater 1 and one end of the alternating current power source, and the output end of the low-temperature heating wire 11 of the electric heater 1 is connected to the other end of the alternating current power source via the rectifier 3. And the output end of the rectifier 3 is connected to the DC brushless motor 2, thereby forming a step-down action (for example, stepping down to 24V or 48V) directly before the electric heating wire of the electric heater is used as the AC power input rectifier. The rectifier provides a stable DC power supply for the DC brushless motor. The medium temperature heating wire 12 and the high temperature heating wire 13 of the electric heater 1 are respectively connected in parallel with the low temperature heating wire 11, and the medium temperature heating wire 12 and the high temperature heating wire 13 are selected by the selection switch 5 to open and close the circuit of the circuit. Medium or high temperature operation options when using the blower.

In the practical application of the above embodiment, when the power switch 4 is switched to ON, the alternating current is introduced to cause the low-temperature heating wire 11 of the electric heater 1 to conduct heat, and the voltage of the alternating current is stepped down by the low-temperature heating wire 11 of the electric heater 1. The required low voltage value is then passed through the rectifier 3 to form a DC power supply for the DC brushless motor 2, so that the DC brushless motor 2 drives the fan 6 to operate, and the hot air of the blower is blown at a low temperature. In use, the selection of the warm electric heating wire 12 and the high-temperature electric heating wire 12 in the electric heater 1 can be performed by switching the selection switch 5 to achieve the blowing of the hot air in the hair dryer.

Please refer to the figure in Figure 2 for the case "Blower DC Brushless Motor Power Supply" Another embodiment of the system includes an AC power supply (100V~240V), a power switch 4, an electric heater 1, a selector switch 5, a rectifier 3, a DC brushless motor 2, a fan 6, a filter line 7, and a voltage stabilizing line 8. And the safety protection circuit 9; wherein the electric heater 1 has more than one electric heating wire (in the embodiment of the present invention, a three-section electric heating wire is taken as an example), and includes a low-temperature electric heating wire 11, a medium-temperature electric heating wire 12, and a high-temperature electric heating wire. 13. A power switch 4 is connected in series between the input end of the low temperature heating wire 11 of the electric heater 1 and one end of the alternating current power source, and the output end of the low temperature heating wire 11 of the electric heater 1 is connected to the other end of the alternating current power source via the rectifier 3, and The output end of the rectifier 3 is connected to the filter line 7 via the voltage stabilizing line 8 and the safety protection line 9, and provides a stable DC power supply of the DC brushless motor 2 to drive the fan to operate, thereby forming a low temperature electric heating wire directly connected to the electric heater 1. 11 as the AC power input rectifier 3 before the step-down action (for example: step down to 24V or 48V), and then through the rectifier 3, filter line 7, voltage regulator line 8 and safety protection line 9, provide a stable DC power supply to DC Brushless horse Up to 2 use. The medium temperature heating wire 12 and the high temperature heating wire 13 of the electric heater 1 are respectively connected in parallel with the low temperature heating wire 11, and the medium temperature heating wire 12 and the high temperature heating wire 13 are selected by the selection switch 5 to open and close the circuit of the circuit. Medium or high temperature operation options when using the blower.

In the practical application of the above another embodiment, when the power switch 4 is switched to ON When the AC power is introduced, the low-temperature heating wire 11 of the electric heater 1 is electrically heated, and the voltage of the alternating current is stepped down to the required low-voltage value by the low-temperature heating wire 11 of the electric heater 1, and then converted into a DC power source through the rectifier 3, and then The filter line 7, the voltage stabilizing line 8 and the safety protection line 9 form a stable DC power supply for the DC brushless motor 2, so that the DC brushless motor 2 drives the fan 6 to operate, and the hot air of the blower is blown at a low temperature. In use, the selection of the warm electric heating wire 12 and the high-temperature electric heating wire 12 in the electric heater 1 can be performed by switching the selection switch 5 to achieve the blowing of the hot air in the hair dryer.

Through the creation of this case, the following practical benefits have been achieved: 1. It is indeed a simplified power supply system for the DC brushless motor of the hair dryer; 2. It effectively reduces the production cost of the DC brushless motor power supply system of the hair dryer; 3. It effectively improves the practical and economic value of the hair dryer.

1‧‧‧Electric heater

11‧‧‧Low temperature electric wire

12‧‧‧Medium temperature heating wire

13‧‧‧High temperature electric heating wire

2‧‧‧DC brushless motor

3‧‧‧Rectifier

4‧‧‧Power switch

5‧‧‧Selection switch

6‧‧‧Fan

Claims (2)

A DC brushless motor power supply system for a hair dryer, comprising an AC power source, a power switch, an electric heater, a selector switch, a rectifier, a DC brushless motor, and a fan driven by a DC brushless motor, the heater having more than one heating wire; The utility model is characterized in that: a power switch is connected in series between the input end of the low-temperature heating wire of the electric heater and one end of the alternating current power source, and the output end of the low-temperature heating wire of the electric heater is connected to the other end of the alternating current power source via the rectifier, and the output end of the rectifier is Connected to the DC brushless motor to form a step-down action directly before the electric heating wire of the electric heater is used as the AC power input rectifier. A DC brushless motor power supply system for a hair dryer, comprising an AC power source, a power switch, an electric heater, a selection switch, a rectifier, a DC brushless motor, a fan driven by a DC brushless motor, a filter line, a voltage stabilizing line, and a safety protection circuit The electric heater has more than one electric heating wire; characterized in that: a power switch is connected in series between the input end of the low temperature electric heating wire of the electric heater and one end of the alternating current power source, and the output end of the low temperature electric heating wire of the electric heater is connected to the rectifier through the rectifier The other end of the AC power supply, and the output end of the rectifier is connected to the filter line through the voltage-stabilized line and the safety protection line to the DC brushless motor, providing a DC brushless motor with a stable DC power source to drive the fan to operate, forming a direct electric heating The electric heating wire of the device acts as a step-down action before the AC power input rectifier.