阅读说明：本技术 一种交流风扇调速控制电路 (Alternating current fan speed regulation control circuit ) 是由 张江 郭俊峰 李文祥 于 2020-06-29 设计创作，主要内容包括：本发明提供一种交流风扇调速控制电路,包括交流电机、与所述交流电机的输入端相连接的档位开关电路以及可控硅控制电路；所述档位开关电路包括档位开关以及与至少与所述档位开关相连接的高风速电路、中风速电路和低风速电路；所述可控硅控制电路与所述档位开关电路串联连接,且所述可控硅控制电路包括可控硅控制单元以及与所述可控硅控制单元并列连接的减速电容电感电路；所述减速电容电感电路中串联连接有一减速电容和电感,本申请不仅可以用低成本的交流电机输出更多档位的风速,实现方法简单,成本低廉。(The invention provides an alternating current fan speed regulation control circuit, which comprises an alternating current motor, a gear switch circuit and a silicon controlled rectifier control circuit, wherein the gear switch circuit is connected with the input end of the alternating current motor; the gear switch circuit comprises a gear switch, and a high wind speed circuit, a medium wind speed circuit and a low wind speed circuit which are at least connected with the gear switch; the silicon controlled control circuit is connected with the gear switch circuit in series and comprises a silicon controlled control unit and a speed reduction capacitance inductance circuit connected with the silicon controlled control unit in parallel; the speed reduction capacitor and the inductor are connected in series in the speed reduction capacitor inductor circuit, so that the wind speed of more gears can be output by using the low-cost alternating current motor, the implementation method is simple, and the cost is low.)

1. An alternating current fan speed regulation control circuit which characterized in that: the control circuit comprises an alternating current motor, a gear switch circuit and a silicon controlled rectifier control circuit, wherein the gear switch circuit is connected with the input end of the alternating current motor; the gear switch circuit comprises a gear switch, and a high wind speed circuit, a medium wind speed circuit and a low wind speed circuit which are at least connected with the gear switch; the silicon controlled control circuit is connected with the gear switch circuit in series and comprises a silicon controlled control unit and a speed reduction capacitance inductance circuit connected with the silicon controlled control unit in parallel; and a deceleration capacitor and an inductor are connected in series in the deceleration capacitor inductor circuit.

2. An ac fan speed control circuit as claimed in claim 1, wherein: one end of the gear switch is connected with the silicon controlled control circuit, and the other end of the gear switch is connected with one end of the alternating current motor through three branches of the high wind speed circuit, the medium wind speed circuit and the low wind speed circuit respectively.

3. An ac fan speed control circuit as claimed in claim 1, wherein: the silicon controlled rectifier control circuit is connected in series between the high wind speed circuit and the input end of the alternating current motor; and the gear switch is directly connected with one end of the alternating current motor through the medium wind speed circuit and the low wind speed circuit.

4. An ac fan speed control circuit as claimed in claim 2, wherein: the other end of the alternating current motor, which is opposite to the gear switch circuit, is connected with a zero line; and the other end of the silicon controlled control circuit, which is opposite to the gear switch, is connected with a live wire.

5. An ac fan speed control circuit as claimed in claim 3, wherein: the other end of the alternating current motor, which is opposite to the silicon controlled control circuit, is connected with a zero line; and the other end of the gear switch, which is opposite to the silicon controlled control circuit, is connected with a live wire.

[ technical field ]

The invention relates to the technical field of fan speed regulation control circuits, in particular to an alternating current fan speed regulation control circuit which is simple in implementation method and low in cost.

[ background art ]

The mechanical fan was originated in 1830, and a american called james-bylon was inspired from the construction of a timepiece, and a mechanical fan driven by a spring, which can be fixed to a ceiling, was invented. The fan can make the user feel cool by the slow cool wind brought by the rotating fan blades, but the user has to climb a ladder to wind the spring, which is troublesome.

In 1880, the first time that the American comfort provided the blades directly on the motor and then connected with the power supply, the blades rotated at a high speed, and a gust of cool wind was coming, which was the first electric fan in the world.

With the development of science and technology, the existing electric fan can be said to be complete in type and various in style. As one of the main components of the fan, the motor may be classified into an ac motor and a dc motor. The main advantage of the direct current motor is stepless speed regulation. And the most common alternating current motor in the market is only 3 grades or 4 grades. Most people can find the defects of the alternating current motor fan in the process of using the alternating current motor fan, and the number of gears is too few, which is not the wind speed required by people.

[ summary of the invention ]

In order to overcome the problems in the prior art, the invention provides the alternating current fan speed regulation control circuit which is simple in implementation method and low in cost.

The invention provides a technical problem solving scheme for providing an alternating current fan speed regulation control circuit, which comprises an alternating current motor, a gear switch circuit and a silicon controlled rectifier control circuit, wherein the gear switch circuit is connected with the input end of the alternating current motor; the gear switch circuit comprises a gear switch, and a high wind speed circuit, a medium wind speed circuit and a low wind speed circuit which are at least connected with the gear switch; the silicon controlled control circuit is connected with the gear switch circuit in series and comprises a silicon controlled control unit and a speed reduction capacitance inductance circuit connected with the silicon controlled control unit in parallel; and a deceleration capacitor and an inductor are connected in series in the deceleration capacitor inductor circuit.

Preferably, one end of the gear switch is connected with the silicon controlled control circuit, and the other end of the gear switch is connected with one end of the alternating current motor through three branches of the high wind speed circuit, the medium wind speed circuit and the low wind speed circuit respectively.

Preferably, the silicon controlled rectifier control circuit is connected in series between the high wind speed circuit and the input end of the alternating current motor; and the gear switch is directly connected with one end of the alternating current motor through the medium wind speed circuit and the low wind speed circuit.

Preferably, the other end of the alternating current motor, which is opposite to the gear switch circuit, is connected with a zero line; and the other end of the silicon controlled control circuit, which is opposite to the gear switch, is connected with a live wire.

Preferably, the other end of the alternating current motor, which is opposite to the silicon controlled control circuit, is connected with a zero line; and the other end of the gear switch, which is opposite to the silicon controlled control circuit, is connected with a live wire.

Compared with the prior art, the key components of the alternating current fan speed regulation control circuit comprise a silicon controlled control unit, a speed reduction capacitor and an inductor, wherein the speed reduction capacitor and the inductor are connected between a live wire and a gear switch in series, the wind speed gear can be doubled by the connection mode, the silicon controlled control unit has the function of short-circuiting the speed reduction capacitor and the inductor, when the unit acts, the speed reduction capacitor and the inductor are short-circuited by the silicon controlled which is conducted in two directions, the speed reduction does not work, the wind speed of the electric fan runs by a high-gear fan, a medium-gear fan and a low-gear fan when the electric fan leaves a factory, when the unit does not work, the speed reduction capacitor and the inductor are connected in series before the alternating current motor, the fan runs at a lower wind.

[ description of the drawings ]

Fig. 1 is a schematic view of a motor circuit connection structure of a conventional fan.

Fig. 2 and 3 are schematic motor circuit diagrams of two different embodiments of an ac fan speed control circuit according to the present invention.

[ detailed description of the invention ]

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 3, an ac fan speed regulation control circuit 1 according to the present invention includes an ac motor, a shift switch circuit connected to an input terminal of the ac motor, and a thyristor control circuit; the gear switch circuit comprises a gear switch, and a high wind speed circuit, a medium wind speed circuit and a low wind speed circuit which are at least connected with the gear switch; the silicon controlled control circuit is connected with the gear switch circuit in series and comprises a silicon controlled control unit and a speed reduction capacitance inductance circuit connected with the silicon controlled control unit in parallel; and a deceleration capacitor and an inductor are connected in series in the deceleration capacitor inductor circuit.

The utility model provides a key device has silicon controlled rectifier control unit, speed reduction electric capacity and inductance concatenate between live wire and gear switch, this connected mode can make the wind speed gear double, silicon controlled rectifier control unit's function is short circuit speed reduction electric capacity and inductor, when this unit moves, speed reduction electric capacity and inductance are by the silicon controlled rectifier short circuit of two-way conduction, slow down the inefficacy, the wind speed of electric fan is with the high-medium low grade fan operation of dispatching from the factory, when this unit is out of work, speed reduction electric capacity and inductance concatenate before AC motor, the fan can be with the lower wind speed operation of dispatching from the factory, the size of regulating capacitor and inductor, can realize the regulation of wind speed.

Preferably, one end of the gear switch is connected with the silicon controlled control circuit, and the other end of the gear switch is connected with one end of the alternating current motor through three branches of the high wind speed circuit, the medium wind speed circuit and the low wind speed circuit respectively.

Preferably, the silicon controlled rectifier control circuit is connected in series between the high wind speed circuit and the input end of the alternating current motor; and the gear switch is directly connected with one end of the alternating current motor through the medium wind speed circuit and the low wind speed circuit.

Preferably, the other end of the alternating current motor, which is opposite to the gear switch circuit, is connected with a zero line; and the other end of the silicon controlled control circuit, which is opposite to the gear switch, is connected with a live wire.

Preferably, the other end of the alternating current motor, which is opposite to the silicon controlled control circuit, is connected with a zero line; and the other end of the gear switch, which is opposite to the silicon controlled control circuit, is connected with a live wire.

The wiring diagram of the motor of the traditional alternating current electric fan is shown in fig. 1, and the fan runs at the speed of the gear position which is pressed and conducted by the gear position switch, namely the high gear, the middle gear and the low gear.

The improved method of the invention can output more gear wind speeds by using the low-cost alternating current motor. The realization method is simple and the cost is low.

Compared with the prior art, the key components of the alternating current fan speed regulation control circuit 1 comprise a silicon controlled control unit, a speed reduction capacitor and an inductor, wherein the speed reduction capacitor and the inductor are connected between a live wire and a gear switch in series, the wind speed gear can be doubled by the connection mode, the silicon controlled control unit has the function of short-circuiting the speed reduction capacitor and the inductor, when the unit acts, the speed reduction capacitor and the inductor are short-circuited by the silicon controlled which is conducted in two directions, the speed reduction does not work, the wind speed of the electric fan runs by a high-gear fan, a medium-gear fan and a low-gear fan when the electric fan leaves a factory, when the unit does not work, the speed reduction capacitor and the inductor are connected in series before the alternating current motor, the fan runs at a lower wind.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.