CN211692916U

CN211692916U - Anti-blocking fan

Info

Publication number: CN211692916U
Application number: CN202020020278.6U
Authority: CN
Inventors: 程松奇
Original assignee: Dongguan Qifang Electric Co ltd
Current assignee: Dongguan Qifang Electric Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-10-16
Anticipated expiration: 2030-01-06

Abstract

An anti-blocking fan relates to the technical field of heat dissipation fans used in electrical equipment. The cooling fan comprises a support, a single-phase asynchronous motor, fan blades and a starting capacitor, wherein a forward and reverse rotation control circuit for controlling the forward rotation or the reverse rotation of the single-phase asynchronous motor in a timing mode is connected between a winding of the single-phase asynchronous motor and a power supply input end. The positive and negative rotation control circuit is integrated on the basis of the traditional cooling fan, the single-phase asynchronous motor of the fan is controlled by the positive and negative rotation control circuit in a timing mode to rotate reversely, and dust adsorbed on the dustproof filter screen due to the long-time positive rotation process can be blown away in the reverse rotation process, so that the technical effect of blocking prevention is achieved, the implementation is easy, and the original control system of the electrical equipment is not required to be improved.

Description

Anti-blocking fan

Technical Field

The utility model relates to radiator fan technical field who uses among the electrical equipment.

Background

Adopt forced air cooling heat dissipation among electrical equipment to belong to a common heat dissipation mode, operating environment according to electrical equipment place, often need increase dustproof filter screen with radiator fan's position on electrical equipment's quick-witted case, and the fan that is used for the heat dissipation that has now generally can only one-way rotation, electrical equipment uses a long time, will adhere to a large amount of dust on the dustproof filter screen, not only influence the intake of dustproof filter screen, still cause electrical equipment's radiating efficiency to reduce easily, components and parts burn out, radiator fan's motor load increase, the noise also can corresponding increase.

SUMMERY OF THE UTILITY MODEL

To sum up, the utility model discloses an aim at solves current radiator fan and can only one-way operation, does not possess the technique of dust removal function not enough, and provides one kind and prevents blockking up the fan.

For solving the utility model provides a technique is not enough, and the technical scheme of adoption is:

an anti-blocking fan comprises a support, a single-phase asynchronous motor, fan blades and a starting capacitor, wherein the single-phase asynchronous motor is arranged on the support and is connected with the fan blades, and the starting capacitor is connected with one winding of the single-phase asynchronous motor in series; the method is characterized in that: and a forward and reverse rotation control circuit for controlling the forward rotation or the reverse rotation of the single-phase asynchronous motor at regular time is connected between the winding of the single-phase asynchronous motor and the power supply input end.

As to the technical scheme of the utility model for further limiting includes:

the forward and reverse rotation control circuit comprises a single-pole double-throw relay and a timing controller for controlling the action of the single-pole double-throw breaker in a timing mode; the common end of the single-pole double-throw breaker is connected with the input end of a power supply, and the normally closed end and the normally open end are respectively connected with two windings of the single-phase asynchronous motor; and two ends of the starting capacitor are respectively connected with the normally closed end and the normally open end.

The timing controller also comprises a secondary winding coupled with the winding of the single-phase asynchronous motor, and the secondary winding provides a working power supply for the timing controller after passing through the rectifying circuit.

The bracket comprises an outer frame bracket, a circular motor mounting seat arranged in the center of the outer frame bracket and a connecting frame for connecting the outer frame bracket and the motor mounting seat; the back of the motor mounting seat is provided with a groove, and the forward and reverse rotation control circuit is embedded in the groove.

The utility model has the advantages that: the utility model discloses integrated positive reverse control circuit on traditional radiator fan's basis, by the single-phase asynchronous machine reversal of positive reverse control circuit timing control fan, at the in-process of reversal, can blow off because of the dust that long-time corotation process was adsorbed on dustproof filter screen to reach the technological effect of preventing blockking up, it is easy to implement, need not to improve the former control system of electrical equipment.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic view of another perspective structure of the present invention;

FIG. 3 is a schematic view of the exploded structure of the present invention;

fig. 4 is a schematic diagram of the circuit principle structure of the present invention.

Detailed Description

The structure of the present invention will be further described with reference to the accompanying drawings and preferred embodiments of the present invention.

Referring to fig. 1 to 4, the utility model discloses a prevent blockking up fan, including support 1, single-phase asynchronous machine 2, flabellum 3 and starting capacitance C1, single-phase asynchronous machine 2 installs on support 1, and single-phase asynchronous machine 2 connects drive flabellum 3, and is known well, single-phase asynchronous machine 2 is including two windings, and one of them winding establishes ties with starting capacitance C1, can change single-phase asynchronous machine 2's direction of operation through the connected mode of change with starting capacitance C1. Referring to fig. 4 in the example of the utility model, suppose that first winding L1 is directly connected with live wire power input end, and second winding L2 is single-phase asynchronous machine 2 corotation state when being connected with live wire power input end through starting electric capacity C1, the utility model discloses a realize single-phase asynchronous machine 2's reversal control, be connected with the positive reverse control circuit of the corotation of the single-phase asynchronous machine of timing control or reversal between single-phase asynchronous machine's winding and power input end.

The positive and negative rotation control circuit has the specific function of realizing that the second winding L2 is directly connected with the live wire power input end in a preset time period, and the first winding L1 is connected with the live wire power input end through the starting capacitor C1. The positive and negative rotation control circuit can realize the above functions and can be a timing controller comprising a single-pole double-throw relay K1 and a timing control single-pole double-throw breaker K1; the common end of the single-pole double-throw circuit breaker K1 is connected with the input end of a live wire power supply, the normally closed end is connected with the first winding L1, the normally open end is connected with the second winding L2, and two ends of the starting capacitor are respectively connected with the normally closed end and the normally open end; after the coil of the single-pole double-throw relay K1 is electrified under the control of the timing controller, the common end of the single-pole double-throw breaker K1 is disconnected with the normally closed end and is switched to be connected with the normally open end, and therefore the reverse rotation of the single-phase asynchronous motor is achieved.

The timing controller can control the coil of the single-pole double-throw breaker K1 to be electrified and sucked in the preset time of the circuit electrification, can also control the coil of the single-pole double-throw breaker K1 to be electrified and sucked in a short time after the single-phase asynchronous motor 2 rotates forwards for the preset time, and rotates backwards for dedusting in a short time under the condition of not influencing the heat dissipation of the fan.

Because the working power supply of the single-phase asynchronous motor 2 is generally 220V alternating current, and the timing controller generally adopts low-voltage direct current below 5V, the working power supply of the timing controller can be obtained by a secondary winding L3 coupled with the winding of the single-phase asynchronous motor, and the secondary winding L3 is output by a rectifying circuit formed by a diode D1 and a capacitor C2.

The bracket 1 comprises an outer frame bracket, a circular motor mounting seat arranged at the center of the outer frame bracket and a connecting frame for connecting the outer frame bracket and the motor mounting seat; the back of the motor mounting seat is provided with a groove 11, and the forward and reverse rotation control circuit is embedded in the groove 11, so that the forward and reverse rotation control circuit and the support 1 are well integrated, and the installation is convenient.

Claims

1. An anti-blocking fan comprises a support, a single-phase asynchronous motor, fan blades and a starting capacitor, wherein the single-phase asynchronous motor is arranged on the support and is connected with the fan blades, and the starting capacitor is connected with one winding of the single-phase asynchronous motor in series; the method is characterized in that: and a forward and reverse rotation control circuit for controlling the forward rotation or the reverse rotation of the single-phase asynchronous motor at regular time is connected between the winding of the single-phase asynchronous motor and the power supply input end.

2. The anti-clogging fan according to claim 1, wherein: the forward and reverse rotation control circuit comprises a single-pole double-throw relay and a timing controller for controlling the action of the single-pole double-throw breaker in a timing mode; the common end of the single-pole double-throw breaker is connected with the input end of a power supply, and the normally closed end and the normally open end are respectively connected with two windings of the single-phase asynchronous motor; and two ends of the starting capacitor are respectively connected with the normally closed end and the normally open end.

3. The anti-clogging fan according to claim 2, wherein: the timing controller also comprises a secondary winding coupled with the winding of the single-phase asynchronous motor, and the secondary winding provides a working power supply for the timing controller after passing through the rectifying circuit.

4. The anti-clogging fan according to claim 1, wherein: the bracket comprises an outer frame bracket, a circular motor mounting seat arranged in the center of the outer frame bracket and a connecting frame for connecting the outer frame bracket and the motor mounting seat; the back of the motor mounting seat is provided with a groove, and the forward and reverse rotation control circuit is embedded in the groove.