JPH02192533A - Ventilation fan - Google Patents

Abstract

PURPOSE:To enable an operation of an electric motor and an opening or closing operation of a shutter plate to be confirmed by a method wherein a ventilation fan is formed by an operating piece for a cooperating lever and an operation displaying member engaged with the operating piece and moved. CONSTITUTION:As an operation displaying member 42 is moved downwardly, a displaying of 'operation' is exposed in a displaying window 41. The operation displaying member 42 us formed with an engaging part 47 to which an extreme end of an operating piece 30 of a cooperating lever 8 is inserted and fitted. An engaging depth of the operating piece 30 for the engaging part 47 is provided with a margin and even if the engaging depth is varied, an engagement between the engaging part 47 and the operating piece 30 is not disengaged and at the same time a relative movement is not prevented. As a pulling strap 34 is pulled and a strap switch 10 is turned on to drive an electric motor 4, the cooperating lever 8 is pulled down to open the shutter plate 7, resulting in that the display by the operation displaying member 42 is changed to 'operatioon' and thus it is possible to confirm that the operating condition is applied. Even if the ventilation fan 1 is varied so as to open the shutter plate 7 under an acceptance of air pressure, the shutter plate 7 is opened and the cooperating lever 8 is moved downwardly, the display by the operation displaying member 42 is changed over to 'operation'.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention covers the wind tunnel in which the blower blades are located with a covering such as a decorative panel or an oil smoke collection filter body, so that the blower blades can be easily viewed directly. Regarding ventilation fans that cannot be used.

(B) Prior art As a technology prior to the present invention, there is a ventilation fan described in Japanese Utility Model Publication No. 46-26613. A ventilation fan has a permanent magnet attached to the end of the rotating shaft of the electric motor, an integral front cover attached to the suction side of the ventilation frame that supports the electric motor, and a permanent magnet attached to the front cover in a position opposite to the permanent magnet attached to the front cover. A non-ferrous conductive operation indicator is formed which rotates by cutting off the magnetic flux, and this operation indicator is used to indicate the operation of the electric motor.

By driving the operation indicator at the end of the rotating shaft of the electric motor, one operation indicator is formed in the center of the front cover, and an airflow containing oil smoke and an airflow containing dust flows around it.

Therefore, oily smoke or the like adheres to the operation indicator, which frequently causes malfunctions.

Furthermore, although the operation of the electric motor can be confirmed on the operation display, the operation of the shutter plate that opens and closes the disposal side of the ventilation frame cannot be confirmed.

(c) Problems to be Solved by the Invention It is an object of the present invention to provide a ventilation fan with a simplified structure that allows confirmation of the operation of the electric motor and the #4 closing operation of the shutter plate.

(d) Means for Solving the Problems The present invention provides a ventilation frame supporting an electric motor, a plurality of shutter plates for opening and closing the exhaust side opening of the ventilation frame, an interlocking rod for opening and closing the shutter plates in conjunction with each other, and a ventilation frame. A front panel that is removably attached to the intake side opening of the body, a blower blade driven by an electric motor, a cover that covers the intake side of the wind tunnel that surrounds the blower blade formed on the front panel, and a cover that is covered by the cover. This problem is solved by means of forming a ventilation fan with an operation display body that is disposed on the side of the front panel and is movable by engaging with the operation piece of the interlocking rod.

In addition, in the above-mentioned method, a cover is formed by a removably attached oil smoke collection filter body on the suction side of the wind tunnel on the front panel, and a display window is provided on the side of the front panel to expose the operation display body. The problem is solved by means of forming an operation display body on the inner surface of the display window portion of the front panel so as to be able to slide up and down.

The switch for stopping the electric motor may be attached to the ventilation frame and operated by pulling with a pull cord, or the switch may be formed on the room wall and configured to be turned on and off.

The shutter plate may be opened and closed by simultaneously pulling the interlocking rod when the switch is pulled, or may be opened by the wind pressure of the blower blade.

The present invention is particularly effective in a configuration in which the shutter plate is opened by the pressure of the air flow generated by the blower blade.

(E) Function According to the present invention, when the shutter plate is opened, the interlocking rod also moves, and the operation display body formed on the front panel is operated by the movement of the interlocking rod, thereby indicating whether to run or stop.

By forming an operation indicator on the side of the front panel, the operation can be confirmed even if the blower blade is covered by a cover.

(F) Embodiment The present invention will be described with reference to FIGS. 1 to 7, using a ventilation fan 1 equipped with an integrated oil smoke collection filter 2 as a specific example.

The ventilation fan 1 includes a square cylindrical ventilation frame 3 formed by bending and joining sheet metal, an electric motor 4 supported at the center by a support rod installed inside the ventilation frame 3, and a spinner attached to the rotating shaft of the electric motor 4. A blower blade 5 to be attached, a shutter support frame 6 fixed to the inner surface of both sides of the exhaust side opening of the ventilation frame 3 with screws 13, a plurality of shutter plates 7 supported to open and close by the shutter support frame 6, and the shutter plate 7 an interlocking rod 8 that opens and closes in conjunction with each other, a pull cord switch 10 that is fixed to the lower right side of the intake side opening mounting collar piece 9 of the ventilation frame 3, and a synthetic resin front panel 11 that is hooked and elastically engaged with the mounting collar piece 9. , a wind tunnel 12 formed in the front panel 11
It is equipped with an integrated oil and smoke collection filter 2 that is attached to the edge of the suction port of the filter.

Figure 1 is a cutaway left side view of the ventilation fan 1 with the shutter plate 7 closed, Figure 2 is a front view of the ventilation fan 1, and Figure 3 is the IQ
A left sectional view of the ventilation fan 1 attached to the room wall W, FIG. 5 is a cutaway left side view of the shutter plate 7 with it open, FIG. 6 is a front view of the ventilation fan 1, and FIG. 7 is a ventilation frame. 3 is a left side view of the shutter support frame 6 attached to the right inner surface of the body 3. FIG.

The shutter support frame 6 is made of synthetic resin, and includes a pivot shaft 21 that pivots the shutter plate 7, a buffer protrusion 22 that contacts the shutter plate 7 when it is closed, and a screw 13 for fixing it to the ventilation frame 3. It has a screw hole 23 into which it is inserted, and a shirt flap prevention protrusion 25 that the protrusion 24 of the interlocking rod 8 comes into contact with. The protrusion 25 forms an L-shaped piece 26 along the inner surface of the ventilation frame 3 from the shutter support frame 6, and is formed on the rear surface of the L-shaped piece 26 that protrudes from the ventilation frame 3. The protrusion 25 has elasticity and elastically supports the protrusion 24 of the interlocking rod 8.

The interlocking rod 8 is made of sheet metal. The interlocking rod 8 is connected to the shutter plate 7 by inserting a connecting pin 29 into a vertically elongated hole 28 formed in the connecting piece 27 of the interlocking rod 8, and fixing the connecting pin 29 to the front edge of the shutter plate 7. Let's do it. The interlocking rod 8 can move in the vertical range of the vertically elongated hole 28 regardless of the shutter plate 7.

Triangular protrusions 24 are formed at the upper and lower parts of the connecting rod 8, and the tips of the protrusions 24 abut against the protrusions 25. An operating piece 30 is formed on the connecting rod 8 along the inner surface of the ventilation frame 3. The operation piece 30 is biased upward by the first spring body 31, and the second
It is connected to the operating rod 33 of the pull cord switch 10 by a spring body 32. The second spring body 32 has a stronger spring force than the first spring body 31, and buffers the influence of external force from the operating piece 30 on the pull cord switch 10. The spring force of the first spring body 31 pulls up the interlocking rod 8 and closes the shutter plate 7 when the operating rod 33 is unlocked by pulling the pull string 34 of the pull string switch 10 .

In the state shown in FIGS. 1 to 3, the shutter plate 7 is closed and the electric TF 14 is stopped. At this time, the interlocking rod 8 is
It is pulled up by the spring body 31, and the protrusion 24 is pulled up by the protrusion 2.
5, and due to the outside wind and the difference in pressure between the inside and outside, the shutter plate 7
It is preventing Batak from doing so. When the pull cord 34 of the pull cord switch 10 is pulled, the interlocking rod 8 moves downward along the vertically elongated hole 28, and the protrusion 24 is moved downward from the protrusion 25 so that the pull cord switch 10 can be moved backward. When the drawstring 34 is further pulled, the interlocking rod 8 moves forward and downward, and the shutter plate 7 opens. At this time, the operating piece 30 comes into contact with the L-shaped piece 26 to prevent the interlocking rod 8 from moving downward, thereby reliably holding the shutter plate 7 in the open state without shaking. The upward movement of the interlocking rod 8 is caused by the locking of the operating rod 33 within the pull cord switch 10.

When the first spring body 31 and the second spring body 32 are removed from the operation piece 30 and the first spring body 31 and the second spring body 32 are locked to appropriate parts of the ventilation frame 3, the ventilation fan 1 is operated by a shutter plate wind pressure opening/closing type. becomes. At this time, since the interlocking rod 8 is not biased upward, it moves downward along the vertically elongated hole 28, and the abutment between the protrusion 24 and the protrusion 25 is released. Therefore, although it is not possible to prevent the shutter plate 7 from flapping, when the electric motor 4 is driven and the blower blades 5 rotate and blow air toward the shutter plate 7, the wind pressure causes the shutter plate 7 to open. , the interlocking rod 8 moves downward and forward. Air blower blade 5
When the shutter plate 7 stops, the shutter plate 7 closes under its own weight.

At the edge of the air intake port of the wind tunnel 12 on the front panel 11, a stepped portion is formed on which the oil smoke collection filter 2 is removably attached, and the air temperature 12
The filter unit 2 covers the suction port of the filter. front panel 1
A removable oil receiver 35 is attached to the lower part of the oil container 1.

A display window 41 is formed in the form of a square hole on the right side of the front panel 11 that is not covered by the filter unit 2. Display window 4
On the inner surface of the front panel 11 that forms
An operation display body 42 having two displays above and below is slidably mounted. The operation display body 42 is slidably mounted by fixing a holding plate 43 holding both sides to the front panel 11 with screws 44. The operation display body 42 is removed in the vertical direction by forming protrusions 45 on the upper and lower edges of the operation display body 42 and abutting against the edges of the holding plate 43. The operation display body 42 is urged upward by a spring body 46, and the "stop" display is exposed from the display window 41 unless an external force is applied. When the driving display body 42 moves downward, a display of "luck" is exposed on the display window 41. The operation display 42 has the operation piece 3 of the interlocking rod 8.
An engaging portion 47 into which the 0 tip is inserted and fitted is formed, and the engagement (insertion) depth of the operation piece 30 into the engaging portion 47 is performed with a margin, so that even if the engagement depth changes, the engagement will not be interrupted. part 47 and operation piece 3
0 and 5 do not disengage from each other, and do not prevent mutual movement of 5. In order to smoothly engage the engaging part 47 and the operating piece 30, the ends of the operating piece 30, especially the upper and lower edges, are formed into an arc shape, and the entrance of the engaging part 47 is formed as an inclined surface facing the back. There is.

When the electric motor 4 in FIGS. 1 and 2 is stopped and the shutter plate 7 is closed, the operation display 42 will display "stop".
Therefore, it can be confirmed that the operation is stopped even if it is covered by the integrated oil smoke collection filter 2.

When the pull cord 34 is pulled and the pull cord switch 10 is turned on to drive the electric motor 4, and the interlocking rod 8 is pulled down to open the shutter plate 7, the display on the operation display 42 changes to "luck", indicating that it is in the operating state. can be confirmed.

Even if the ventilation fan 1 is changed so that the shutter plate 7 opens due to wind pressure, when the shutter plate 7 opens and the interlocking rod 8 moves downward, the display on the operation display 42 changes to "luck".

The display by the operation indicator 42 may be "stop" or "luck", or may be a color display in which stop is white and drive is red,
The display windows 41 may be arranged in a plurality of upper and lower sections, with the lower one being a stop display window and the upper one being an operation display window, which may be used for color change display.

(g) Effects of the Invention The present invention provides a display that can be formed on the side of the front panel that is not covered by the cover by operating the operation indicator with an interlocking rod that interlocks the opening and closing of the shutter plate. operation and release of the shutter plate can be indirectly confirmed.

[Brief explanation of the drawing]

The figures show the present invention; FIG. 1 is a cutaway left side view of the main part with the shutter plate closed; FIG. 2 is a front view of the same; FIG. 3 is a left sectional view; FIG. The figure is a left side view with the shutter plate open, with a main part cut away, FIG. 6 is a front view of the same, and FIG. 7 is a left side view of the right shutter support frame 6. DESCRIPTION OF SYMBOLS 1... Ventilation fan, 2... Filter integrated, 3... Ventilation frame, 4... Electric motor, 5... Air blower, 6... Shutter support frame, 8... Interlocking rod, 1o ...Pull string switch, 11...Front panel, 12...Wind tunnel, 30...
- Operation piece, 41...display window, 42...operation display body.

Claims (1)

[Claims] 1. A ventilation frame that supports an electric motor, a plurality of shutter plates that open and close the exhaust side opening of the ventilation frame, an interlocking rod that opens and closes the shutter plates in conjunction with each other, and an intake side opening of the ventilation frame. A front panel that is removably attached to the front panel, a blower blade driven by an electric motor, a cover that covers the suction side of the wind tunnel that surrounds the blower blade formed on the front panel, and a side of the front panel that is not covered by the cover. A ventilation fan consisting of an operation indicator disposed in the section and movable by engaging with an operating piece of an interlocking rod. 2. On the suction side of the wind tunnel on the front panel, a cover is formed by a removably attached oil smoke collection filter body, and a display window is formed on the side of the front panel to expose the operation display body, and the front panel 2. The ventilation fan according to claim 1, wherein an operation display body is formed on the inner surface of the display window portion so as to be vertically slidable.