CN2421800Y

CN2421800Y - Automatic dust-preventing and radiating device for electrical appliance

Info

Publication number: CN2421800Y
Application number: CN 00209371
Authority: CN
Inventors: 陈海记
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-14
Filing date: 2000-04-14
Publication date: 2001-02-28
Anticipated expiration: 2010-04-14

Abstract

The utility model relates to an automatic dust preventing and radiating device for an electric appliance, which is composed of rotary blades, a pull rod, a motor, and a heat sensor, wherein, both ends of each rotary blade are provided with shafts which are arranged in bearings of a casing of an elastic appliance, a supporting rod is arranged under the rotary blades, a motor shaft is provided with a gear, a rack arranged at the pull rod is engaged with the gear arranged at the motor shaft, and the pull rod and the supporting rod are connected. When the electric appliance does not generate heat (is not used) or when the heat generation is not much, the rotary blades of the utility model can be closed for preventing the dust. When the used temperature exceeds a predetermined value, the motor is operated to open the rotary blades for radiating the heat; when the electric appliance is stopped, when the temperature in the casing of the electric appliance is lowered to the predetermined value, the motor is rotated reversely to close the rotary blades for preventing the dust.

Description

Electrical equipment automatic dustproof and heat abstractor

The utility model relates to a kind of electrical equipment automatic dustproof and heat abstractor, is mainly used on television set, recorder, video recorder and other utensil, as the part of housing, in order to dustproof and heat radiation.

Prior art does not have the device of this kind structure.Existing dustproof and cooling measure is to cover out louvre.Its weak point is: louvre enters dust, the corrosion electric elements; Cause the fault of electrical equipment; Reduce electrical equipment useful life.

The purpose of this utility model is that the blank of filling up this area provides a kind of dustproof electrical equipment automatic dustproof and heat abstractor of both having dispelled the heat with overcoming above-mentioned weak point of the prior art.

The purpose of this utility model can reach by following measure: the utility model is made up of moving blade, pull bar, motor and thermal sensor, the moving blade two ends have axle to pack in the bearing of casing for electric appliances, under the moving blade pole is arranged, gear is arranged on the motor shaft, tooth bar on the pull bar and upper gear of motor shaft engagement, pull bar is connected with pole.

The drawing of accompanying drawing is described as follows:

Fig. 1 is total figure of the present utility model, and expression moving blade closure is with the dustproof structure;

Fig. 2 represents the structure of the utility model moving blade unlatching with heat radiation;

Fig. 3 represents the circuit diagram of the utility model motor.

The accompanying drawing piece number is represented:

1, moving blade 2, pull bar 3, motor 4, axle

5, pole 6, gear 7, transformer 8, thermal sensor

9, diode 10, little power supply

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:

Fig. 1 and Fig. 2 represent structure of the present utility model, mainly are made up of moving blade 1, pull bar 2, motor 3, and there is axle 4 at the moving blade two ends, and axle is packed in the bearing or axle sleeve of casing for electric appliances.Usually the utility model is installed in casing for electric appliances end face or side, is made of the wall of casing for electric appliances the polylith moving blade.The below at an angle of every moving blade is fixed with pole 5, and pole is connected on the pull bar 2.Be fixedly connected with gear 7 on the axle of motor 6, the tooth bar engagement of gear and pull bar drives blade 1 with drive stay and sways.The startup of motor and shutdown are controlled by thermal sensor.Moving blade is opened and switch is equipped with at closed place.

Fig. 3 represents to open and close the circuit diagram of motor 3, is made up of transformer 7, thermal sensor 8, diode 9 and little power supply 10.After connecting diode, the electric wire of an end of the low tension after the transformation (present embodiment is 6V) (diagram top) is divided into two-way, one tunnel series connection thermal sensor and motor positive pole, and another road is connected to little power cathode.Low tension hold one the tunnel directly to connect the motor negative pole in addition, another road is by connecting little positive source behind the diode.

During use, each moving blade is involutory, enters in the casing for electric appliances to prevent dust.When using a period of time, after temperature rises to and gives fixed temperature in the casing for electric appliances, thermal sensor works, and low tension one end (electric wire of diagram top) connects the motor positive pole, and low tension is termination motor negative pole in addition, motor just changes, the pull bar of the gear drive band tooth bar on the motor shaft moves, and hauls every moving blade and sways and decide angle to giving, and moving blade touches switch shuts down motor, see shown in Figure 2ly, this moment, moving blade was opened with heat radiation.When close appliances power source with and the electrical equipment internal temperature is dropped to when identical with the electrical equipment external temperature; thermal sensor is opened little mains switch 10; electric current flows to electrical micro-machine negative pole (seeing in Fig. 3 bracket) from little positive source; the motor counter-rotating; drive pull bar and pole; close moving blade, with the realization dust reduction capability, thus the electronic original part of protection electrical equipment.

The utility model can be obtained following good effect:

Electrical equipment does not generate heat (not using) or generates heat when not high, and moving blade closure of the present utility model is with dustproof. Wait to make When surpassing predetermined value to temperature, motor rotation is opened moving blade with heat radiation, treat that electrical equipment is stopped using and casing for electric appliances in temperature Degree is when being down to predetermined value, motor reversal with closed moving blade with dustproof.

Claims

1, a kind of electrical equipment automatic dustproof and heat abstractor, it is characterized in that, form by moving blade, pull bar, motor and thermal sensor, the moving blade two ends have axle to pack in the bearing of casing for electric appliances, under the moving blade pole is arranged, gear is arranged on the motor shaft, tooth bar on the pull bar and upper gear of motor shaft engagement, pull bar is connected with pole.