JPS5926213B2 - ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to simplify the structure of a ventilation fan whose shutter is opened and closed by a fan motor.

As a method of automatically opening the shutter when the ventilation fan is operating,
There are methods of opening the shutter using wind pressure from a fan, or using a fan motor, which is a small accelerating motor. The method of using a small acceleration motor has the disadvantage of high cost.

In order to solve this problem, some shutters open the shutter by winding up a drawstring for opening and closing the shutter using a fan motor, but when the shutter is fully opened, the connection between the fan motor and the drawstring is severed and the drawstring is fixed at the same time. This had the disadvantage that the clutch mechanism and gear mechanism were extremely complicated.

The present invention uses a motor in which the outer rotating iron core and the inner iron core rotate together to rotate the fan and open the shutter at the same time, and there is no need to interrupt the connection between the motor and the shutter even when the shutter is fully opened. In this way, the structure is simplified.

The present invention will be explained below with reference to the drawings. Reference numeral 1 denotes a ventilation fan, which faces an indoor opening and is equipped with a motor 3 that drives a ventilation fan 2, and which faces an outdoor opening and has a shutter 4.4.4. We are prepared.

Reference numeral 5 denotes an interlocking plate connecting each shutter, and the interlocking plate is pulled up by a tension spring 6 to hold the shutters 4.4.4 in a closed state. This interlocking plate 5 is connected to the motor 3.

Reference numeral 9 denotes a rear bracket of the motor fixed at the center of the ventilation passage of the ventilation fan main body 1 via support legs 10.10.A cylindrical portion 11 integrally projects from the center of the bracket 9, and a metal rod 127i is attached to the cylindrical portion. - Press fit to form a center fixed axis AE shadow.

Reference numeral 13 denotes a front bracket of the motor, which has a bifurcated inner peripheral edge to accommodate an oil-impregnated felt 14 and a bearing metal 15 press-fitted therein. 16.16 prevents movement in the front and back direction.

The outer rotary core 17 of the motor is press-fitted into the front bracket 13, and the outer rotary core 17 is rotatably attached to the central fixed shaft A.

The boss portion 18 of the fan 2 is fitted into the front bracket 13, so that the blower fan 2 is rotated by the outer rotating core 170 rotations.

Reference numeral 19 denotes an inner core having a winding 20, which is rotatably and slidably attached to the cylindrical portion 11 via a bearing metal 21 press-fitted into the core, and is normally pushed to the left by a spring 22. It is displaced.

23 is attached to the cylindrical portion 1 so as not to deviate more than necessary.
This is the stop ring provided at 1.

Reference numeral 24 denotes a cylindrical gear installed on the inner core 19, which has teeth 25 on its opening periphery and a slip ring 26, 26 on its inner peripheral surface, which is fixed to the cylindrical portion 11. The contacts 28 and 28 of the terminal board 27 are brought into sliding contact to supply power to the winding 20.

29 is a lead wire pulled out from the terminal board 27.

30 is a reduction gear whose peripheral edge faces the teeth 25 of the cylindrical gear; its shaft 31 is rotatably supported between a pair of support plates 32 and 32 attached to the rear bracket 9; The drawstring 8 is wound around this shaft 31.

33 is a tube protecting the drawstring.

In the above configuration, from the lead wire 29 to the contact point 28 of the terminal board
When current is supplied to the winding 20 through the ST-IJ tubing 26, a magnetic force is generated, and the inner core 19 moves to the normal position shown by the dashed line against the force of the spring 22, causing the teeth of the cylindrical gear to move. 25 meshes with the reduction gear 30.

Further, since the inner core 19 is rotatably attached, the inner core 19 rotates due to the generated rotating magnetic field, rotates the reduction gear 30, and the shaft 31 of the inner core 19 rotates the drawstring 8.
Wind up.

As the drawstring is wound up, the interlocking plate 5 is pulled down.

Shutter 4.4.4 opens. When the drawstring 8 is pulled until the shutter is fully open, the stopper 34 attached to the drawstring hits the end of the protective tube 33 and the drawstring 8 no longer moves, so the inner core 19 is held in a locked state. The shutter 4.4.4 is held fully open.

When the inner core 19 is locked, the outer rotary core 17 rotates at a steady high speed in order to maintain the slippage between it and the inner core, and the blower fan 2 discharges indoor air.

When the power to the winding is cut off, the fan 2 stops and at the same time attracts the inner core 19 to its normal position and the magnetic force disappears, so the inner core 19 is pushed by the spring 22 and moves to the left. , cylindrical gear〇teeth 25 and reduction gear 30
The mesh becomes disengaged.

Therefore, the interlocking plate 5 is pulled up by the tension spring 6, the hinges 4, 4.4 are closed, and the ventilation operation is stopped.

As described above, the present invention enables not only the outer rotary core 17 of the motor but also the inner core 19 having the winding 20 to rotate, so that the outer rotary core 17 rotates the blower fan 2, and at the same time the inner core 19 rotates. by shutter 4
Since the fan 2 can be rotated and the shutter 4 can be opened and closed by one motor 3, it is economical, and when the shutter is fully opened, the inner core 19 is held in a locked state to open and close the shutter. Since the pull string 8, etc. for use in This eliminates the need for an engagement device, etc., and the structure can be simplified.

In addition, the power supply to the motor 3 is cut off, = sometimes the inner iron core 19
moves in the axial direction and disconnects from the gear 30 of the shutter opening/closing mechanism, making it easier to close the shutter 4.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the ventilation fan of the present invention, and FIG. 2 is a longitudinal sectional view of the fan motor. 17...Outer rotating core, 20...Winding, 19...Inner core, A...Center fixed shaft, 22...Spring , 24... cylindrical gear, 30... gear, 4... shutter.

Claims (1)

[Claims] 1. A rotating iron core for driving a fan and an iron core having a winding are rotatably provided, and the iron core is also slidable in the axial direction and is deflected in the axial direction by a spring. moving the iron core to a normal position, meshing a gear attached to the iron core with a gear of a shutter opening/closing mechanism, and opening the shutter by the rotational force of the iron core;
A ventilation fan characterized in that the rotary iron core is configured to rotate steadily when the shutter is fully opened and the iron core is in a locked state.