The ventilation fan that air inlet can be automatically closedTechnical field
The present invention relates to a kind of ventilation fan.
Background technology
When not working, the air of ventilation fan both sides can also be circulated traditional ventilation fan by the gap between flabellum,Therefore the effect for stopping mosquito can not be realized, more it is essential that when winter, bathing indoor ventilation fan becomes cold airThe passage of entrance, causes to bathe indoor temperature too low.To solve this problem, some ventilation fans, which add, is automatically closed air inletFunction, its concrete technical scheme is that shutter is equipped with the outside of ventilation fan, and the window leaf of shutter is installed in shaft, needWhen taking a breath, shutter is opened be rotated up the window leaf of shutter using the air-flow of ventilation fan, and need not taken a breathWhen, the self gravitation of window leaf rotates down it and closes ventilation mouth.Above-mentioned ventilation fan is there are following problems, due to the weight of window leafPower is smaller, when the wind-force in the external world is larger, easily blows open window leaf, loses the effect of closing ventilation mouth, and in external air flowUnder the action of, window leaf can be opened and closed repeatedly, send irritating noise.
The content of the invention
The purpose of the present invention is to propose to the ventilation fan that a kind of air inlet can be automatically closed, this kind of ventilation fan can not workWhen reliably close ventilation mouth.
The ventilation fan that the air inlet of the present invention can be automatically closed includes：
The fan body of frame-type, fan body center are equipped with ventilation mouth, and motor is provided with mouth of taking a breath and utilizes motor-driven flabellum；
Some gate leaves, the side of fan body are equipped with some rotation axis for being used to install window leaf, and window leaf can freely turn around rotation axisIt is dynamic；Window leaf is arranged in the prominent part of movable axis in the side away from rotation axis, the movable axis of fenestrate leaf be connected with connecting rod, the connecting rodEnd be arranged in the prominent part of guide rod perpendicular to connecting rod, the fan body is equipped with the guide groove of arc, the end position of the guide rodIn in guide groove, the radius of the guide groove is equal to the spacing of rotation axis and movable axis on same window leaf, the center of circle of guide grooveAngle is 90 degree；The end of connecting rod is equipped with magnet；
Electromagnet, is made of iron core and the coil being wound on iron core, and the coil passes through ac-dc conversion circuit and ventilation fanPower supply connection；Electromagnet is installed on fan body, and the lower end of face guide groove.
The course of work of above-mentioned ventilation fan is as follows：
After ventilation fan power-off is stopped, window leaf rotates down under the action of self gravitation around rotation axis, while passes through workMoving axis drive connecting rod move down, connecting rod under the guiding role of guide rod and guide groove, can only along arc trajectory downwards andThe rear of fan body（I.e. indoor direction）It is mobile, until the magnet adsorption of interlinking lever end is on the iron core of electromagnet, at this time, window leaf90 degree are have rotated around rotation axis, all window leaves cooperate, the same equivalent to shutter, close ventilation mouth.On connecting rodThe iron core of magnet and electromagnet is attached together, and connecting rod is fixed at the end position of guide groove, while makes window leaf can not be byExtraneous air-flow is blown.
And after ventilation fan energization work, magnet spool obtains electric and produces magnetic, electromagnet and the magnet on connecting rodIdentical charges repel each other, and electromagnet is applied with repulsive force to the magnet on connecting rod so that the guide groove of connecting rod arcuately upwards, to fan bodyFront is moved, so as to rotate synchronously and open with active window leaf, in addition, the air-flow that flabellum is formed can also blow flabellum, it is ensured that changeGas port is opened.
Further, the upper and lower ends of the connecting rod are equipped with guide rod and magnet, so that the flabellum of upper and lower canSmoothly open and close.
Further, the leading flank of the fan body is equipped with the boss for being used for limiting window leaf rotational angle, so that window leaf is closingWhen closing, vertical angle is parked in just.
Further, in the window leaf, the section of middle part window leaf is parallelogram, the bottom surface and bottom of top window leafThe top surface of portion's window leaf is inclined-plane, and so when window leaf is closed, the intersection of neighbouring window leaf is inclined-plane rather than levelFace, the bottom of eyebrow window leaf are pressed in the top end of lower part window leaf, and blowing to active force that indoor wind is applied can be by eyebrow window leafIt is pressed on the window leaf of lower part so that window leaf more they tends to closed mode, it is ensured that window leaf will not be opened automatically under the action of external windOpen.
The ventilation fan of the present invention passes through the installing connecting rods on window leaf so that the fenestrate leaf of institute can only rotate synchronously, and solve listThe problem of a window leaf is easily blown up；The electromagnet and magnet acted at the same time further through limiting rod, can close in window leafWhen for window leaf provide a relatively stable position-limiting action power, it is ensured that the stabilization of window leaf closed mode.
Brief description of the drawings
Fig. 1 is the structure diagram of the opening of the ventilation fan of the present invention.
Fig. 2 is the structure diagram of the closed mode of the ventilation fan of the present invention.
Attached drawing indicates：1st, fan body；2nd, ventilation mouth；3rd, flabellum；4th, window leaf；5th, rotation axis；6th, movable axis；7th, connecting rod；8th, leadTo bar；9th, guide groove；10th, permanent magnet；11st, electromagnet；12nd, boss.
Embodiment
Below against attached drawing, by the description to embodiment, for example involved to the embodiment of the present invention is eachMutual alignment and connection relation, the effect of each several part and operation principle between the shape of component, construction, each several part etc. are made into oneThe detailed description of step.
Embodiment 1：
As shown in the figure, the ventilation fan that the air inlet of the present embodiment can be automatically closed includes：
The fan body 1 of frame-type, the center of fan body 1 are equipped with ventilation mouth 2, and motor is provided with mouth 2 of taking a breath and utilizes motor-driven fanLeaf 3；
Some gate leaves 4, the side of fan body 1 are equipped with some horizontal rotation axis 5, and the upper end of window leaf 4 is equipped with horizontal through hole, lead toThe diameter in hole is slightly larger than the diameter of rotation axis 5, and rotation axis 5 is plugged in through hole so that window leaf 4 can freely turn around rotation axis 5It is dynamic；The middle part of window leaf 4 is being arranged in the prominent part of horizontal movable axis 6 away from the side of rotation axis 5, fenestrate leaf 4 movable axis 6 withConnecting rod 7 is connected, and in the present embodiment, connecting rod 7 is interval with horizontal blind hole, and the diameter of blind hole is slightly larger than the diameter of movable axis 6,The end of movable axis 6 is inserted into blind hole, realizes being flexibly connected for window leaf 4 and connecting rod 7；
The end of connecting rod 7 is arranged in the prominent part of the guide rod 8 perpendicular to connecting rod 7, and the fan body 1 is equipped with the guide groove 9 of arc, described to leadIt is located to the end of bar 8 in guide groove 9, the radius of the guide groove 9 is equal to rotation axis 5 and movable axis 6 on same window leaf 4Spacing, the central angle of guide groove 9 is 90 degree；The end of the upper and lower ends of connecting rod 7 is equipped with permanent magnet 10；
Electromagnet 11, is made of iron core and the coil being wound on iron core, and the coil passes through ac-dc conversion circuit and ventilationThe power supply connection of fan；Electromagnet 11 is installed on fan body 1, and the lower end of face guide groove 9.
The course of work of above-mentioned ventilation fan is as follows：
After ventilation fan power-off is stopped, window leaf 4 rotates down under the action of self gravitation around rotation axis 5, passes through at the same timeMovable axis 6 drive connecting rod 7 move down, connecting rod 7 under the guiding role of guide rod 8 and guide groove 9, can only along arc trajectory toLower section and the rear of fan body 1（I.e. indoor direction）It is mobile, until the permanent magnet 10 of 7 end of connecting rod adsorbs the iron core in electromagnet 11On, at this time, window leaf 4 also have rotated 90 degree around rotation axis 5, and all window leaves 4 cooperate, the same equivalent to shutter, closeVentilation mouth.Permanent magnet 10 and the iron core of electromagnet 11 on connecting rod 7 are attached together, and connecting rod 7 is fixed on to the end of guide groove 9At portion position, while window leaf 4 can not be blown by extraneous air-flow.
And after ventilation fan energization work, the coil of electromagnet 11 obtains electric and produces magnetism, on electromagnet 11 and connecting rod 7Identical charges repel each other for permanent magnet 10, and electromagnet 11 is applied with repulsive force to the permanent magnet 10 on connecting rod 7 so that the leading arcuately of connecting rod 7Moved upwards, to the front of fan body 1 to groove 9, so as to rotate synchronously and open with active window leaf 4, in addition, the air-flow that flabellum 3 is formedAlso flabellum 3 can be blown, it is ensured that ventilation mouth is opened.
The leading flank of fan body 1 is equipped with the boss 12 for being used for limiting 4 rotational angle of window leaf, so that window leaf 4 is when closed, justIt is parked in vertical angle.
In the present embodiment, in the window leaf 4, the section of middle part window leaf 4 is parallelogram, the bottom of top window leaf 4The top surface of face and bottom window leaf 4 is inclined-plane, and so when window leaf 4 is closed, the intersection of neighbouring window leaf 4 is inclined-planeRather than horizontal plane, the bottom of eyebrow window leaf 4 are pressed in the top end of lower part window leaf 4, blow to the active force that indoor wind is appliedEyebrow window leaf 4 can be pressed on lower part window leaf 4 so that window leaf 4 more they tends to closed mode, it is ensured that window leaf 4 will not be in exterior windAutomatically turned under the action of power.