JP5799906B2 - Ventilation fan - Google Patents

Description

  The present invention relates to a ventilation fan equipped with a shutter.

Some conventional shutters of this type of ventilation fan include a plurality of horizontally long shutter plates at the upper and lower opening ends of the box-shaped frame. In this shutter configuration, a long shutter support plate is provided on both inner surfaces of the opening end of the frame, and both ends of each shutter plate are fixed to the shutter support portion so as to be openable and closable. In addition, a shutter connecting plate for connecting the shutter plates is provided, and the shutter plates are opened and closed simultaneously. The shutter connecting plate is formed in an L-shape, and the shutter plates are connected at an L-shaped vertical portion, and a ring-shaped component called a rod is provided at a portion protruding horizontally. The ventilation fan is provided with a pull string switch, and a movable lever that is movable in accordance with the movement of the pull string is provided. The rod is connected to the movable lever. By doing this, when the pull string of the switch is pulled, the movable lever is lowered, the shutter connecting plate is also lowered obliquely forward, and each shutter plate is accordingly opened. When each switch is turned off, the movable lever returns to its original state and the shutter connecting plate is provided with a spring to pull the shutter connecting plate back to the original state. At that time, each shutter plate is closed by its own weight.
In such a ventilation fan, in order to prevent the inflow of outside air and the invasion of light, those having an overlapping portion between shutter plates or between each shutter plate and a ventilation fan frame are known. (For example, refer to Patent Document 1).

JP 2010-139135 A

The conventional ventilation fan is often used in a residential kitchen as an installation location, and there is a slight gap between each shutter plate and the frame so that the operation of each shutter plate does not deteriorate due to oil smoke or dust adhesion. It has a provided structure. However, there has been a problem from the user that light entering through a slight gap is anxious, and reduction of light leakage from the outdoor side has been a problem. As a ventilating fan that reduces light leakage, a shutter and a frame provided with overlapping portions are known. Actually, the frame is often formed of a thin sheet metal plate, and the overlapping portion between the frame and each shutter plate is very narrow. In some cases, it is easily assumed that each shutter plate protrudes from the frame. Furthermore, the ventilation fan is often attached to a square hole in the wall of a house using a wooden frame or the like. When the shutter plate protrudes from the frame, the shutter plate and the inner surface of the square hole interfere with each other, causing a problem that a shutter operation failure such as the shutter not opening or closing occurs.
In some cases, in order to cope with the problem of light entering, another part for reducing the gap between the shutter plate and the frame may be attached to the gap between the frames, increasing the number of parts. Deterioration in assemblability has been an issue.

  The present invention has been made in view of the above, and an object thereof is to reduce light leakage between the shutter plate and the frame so as not to affect the operation of the shutter plate.

In order to solve the above-described problems and achieve the object, the present invention provides a rectangular frame that opens on the indoor side and the outdoor side, and a shutter support that is provided in a vertical direction on the inner side of the outdoor side of the frame. A plate, a plurality of shutter plates that are rotatably supported by the shutter support plate via a support shaft, and are always operated in a closed manner, and a shutter support wall is provided on the shutter support plate. This part is provided with a bent part bent on the indoor side, and a similar bent part is formed on the shielding wall so that when the shutter plate is closed, the shielding wall overlaps with both side surfaces of the shutter plate. is there.

  According to this invention, the ventilation fan which does not have the light leakage from the outdoor side is obtained by providing the shutter support plate for attaching the shutter with the shielding wall overlapping the shutter plate. Further, even when installed in a square hole in a house, the shutter plate does not protrude from the frame, and a ventilation fan that does not malfunction the shutter plate can be obtained. Furthermore, there is no need for a separate part or the like for eliminating light leakage, and the number of parts can be reduced.

It is a disassembled perspective view of the ventilation fan 1 in Embodiment 1 of this invention. It is an enlarged view of the ventilation fan 1 of the part enclosed by the area | region A of FIG. 1 in Embodiment 1 of this invention. It is a disassembled perspective view of the shutter part 55 in Embodiment 1 of this invention. It is an enlarged view of the ventilation fan 1 of the part enclosed by the area | region B of FIG. 1 in Embodiment 1 of this invention. It is sectional drawing of the ventilation fan in Embodiment 1 of this invention. It is a perspective view of the shutter support plate in Embodiment 1 of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an exploded perspective view of a ventilation fan 1 according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of a portion of the ventilation fan 1 surrounded by region A in FIG. 1 according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view of the shutter portion 55 according to Embodiment 1 of the present invention. FIG. 4 is an enlarged view of a portion of the ventilation fan 1 surrounded by a region B in FIG. 1 in Embodiment 1 of the present invention.

As shown in FIG. 1, the ventilation fan 1 includes a frame body 10, fixed legs 60 a and fixed legs 60 b provided on the frame body 10, and an electric motor 70 supported by the fixed legs 60 a and fixed legs 60 b.
In the ventilation fan 1, an orifice 170 is provided in the frame body 10, a fan 90 is attached to the electric motor 70, and a spinner 100 is attached to a central portion of the fan 90.
The orifice 170 is formed of synthetic resin or the like and forms a wind tunnel, and is detachable from the frame body 10.
Note that, for example, a filter, a mesh guard, an oil receiver, and the like are attached to the orifice 170, but the illustration thereof is omitted in FIG.
The ventilation fan 1 is installed in a wall hole or the like formed in a wall or the like (not shown), and rotates the fan 90 to form an air flow between indoor air and outdoor air. The room is ventilated.
Note that the fixed foot 60 a and the fixed foot 60 b are collectively referred to as the fixed foot 60.

The frame 10 is formed from a metal frame in which ends in the short direction of a substantially rectangular metal steel plate having strength to support the entire ventilation fan 1 are connected to each other. The frame body 10 is formed, for example, in a substantially rectangular shape, and has an indoor side and an outdoor side opened.
In the above description, an example in which the frame 10 is formed of a metal frame connected by a substantially rectangular metal steel plate has been described, but the present invention is not particularly limited thereto. For example, the shape may be circular, and the material may be formed of synthetic resin or the like.

An upper flange 20 is provided at the upper edge of the frame 10, a left flange 30 is provided at the left edge of the frame 10, and a right flange 40 is provided at the right edge of the frame 10. A lower flange portion 50 is provided at the lower edge of the frame body 10. The upper flange portion 20, the left flange portion 30, the right flange portion 40, and the lower flange portion 50 are formed by bending a metal steel plate into an L-shaped cross section and being attached to each edge of the frame body 10.
The upper flange portion 20, the left flange portion 30, the right flange portion 40, and the lower flange portion 50 are formed with holes for attaching various mounting brackets and the like.

The electric motor 70 is configured by, for example, a DC brushless motor, and rotates the fan 90 attached to the rotating shaft 80 by rotating the DC brushless motor by inverter control and rotating the rotating shaft 80 provided in the DC brushless motor. It is to be driven. The electric motor 70 includes electric motor flange portions 71 to 74. The motor flange portions 71 to 74 are used when the motor 70 is fixed.
The fan 90 is formed so as to be detachable with respect to the rotating shaft 80 and ventilates the air on the indoor side of the frame body 10 and the air on the outdoor side of the frame body 10 in a state where the ventilation fan 1 is installed.

A frame body outside opening 110 is formed on the outdoor side of the frame 10, and a plurality of shutter plates 120 made of a metal steel plate are provided in the frame room outside opening 110.
Although the details will be described later, the plurality of shutter plates 120 are provided so as to be interlocked with the switch unit 140 via the shutter connecting plate 130.

The switch unit 140 is provided at, for example, the lower left corner of the front surface of the frame body 10 and is connected to a lead wire 152 led out from the electric motor 70 and includes a power cable 150 having a plug 154 at the tip, a pull string 160, It has.
The switch unit 140 switches the physical connection state between the power cable 150 and the lead wire 152 alternately between a conduction state and a disconnection state that is a non-conduction state in response to the pull string 160 being pulled. Thus, it is controlled whether or not the electric power supplied from the plug 154 inserted into an outlet (not shown) is supplied.
The switch unit 140 controls the plurality of shutter plates 120 to be opened via the shutter connection plate 130 when in the conductive state, and controls the plurality of shutter plates 120 via the shutter connection plate 130 when in the power-off state. Is controlled to be closed. That is, according to the pull string 160 being pulled, the plurality of shutter plates 120 are configured to switch alternately between the open state and the closed state.
In the above description, an example in which the shutter plate 120 is formed from a metal steel plate has been described, but the present invention is not particularly limited thereto. For example, the material may be formed of a synthetic resin or the like.

As shown in FIG. 2, an attachment piece 190 and a fan bolt 180 are provided on the frame body upper surface portion 10 a that forms the upper surface of the frame body 10. The mounting piece 190 includes a threaded hole, and the fan bolt 180 is provided in the mounting piece 190 in a state of being screwed into the threaded hole of the mounting piece 190.
The fan bolt 180 is a member used when the ventilation fan 1 is installed. For example, the ventilation fan 1 is installed in a wall hole or the like (not shown) when the installation worker tightens the fan bolt on the surface of the wall hole (not shown).

As shown in FIG. 3, the shutter unit 55 includes a shutter plate 120, a support pin 120 d, a shutter connecting plate 130, and a shutter support plate 200, which will be described later in detail, but one shutter support plate 200 is the shutter plate 120. The other shutter support plate 200 supports the other edge in the short direction of the shutter plate 120 with the shutter connecting plate 130 sandwiched therebetween.
A side wall 120b is formed at the edge of the shutter plate 120 in the short direction. A shutter hole 120a is provided at a corner of the side wall 120b. The shutter hole 120a is a hole formed in an upright state with respect to the side wall 120b, and has a depth for accommodating a protrusion 200a described later.
Note that the other end portion of the shutter plate 120 in the lateral direction has the same configuration as that described above.

The protrusion 200 a is formed on the shutter support plate 200, and is accommodated in the shutter hole 120 a with respect to one edge in the short direction of the shutter plate 120.
The protrusion 200a is housed in the shutter hole 120a with respect to the other edge in the short direction of the shutter plate 120 via the shutter connection plate 130 in which the support pin 120d is inserted into the shutter connection plate support hole 130a. .
The support pin 120d includes a stop pin insertion hole 120c. The support pin 120d is inserted into the shutter connection plate support hole 130a formed in the shutter connection plate 130, and then the stop pin 210a formed in the bush 210 is inserted into the stop pin insertion hole 120c, so that the shutter connection plate 130 is inserted. Is provided to be rotatable with respect to the support pin 120d.

  As shown in FIG. 4, the frame body 10 is provided with a spring 230. One end of the spring 230 is provided on the frame body 10, and the other end is in a state where a certain clearance is maintained with respect to the spring support hole 130 c formed in the shutter connecting plate 130. Provided. The shutter connecting plate 130 is provided so as to interlock with the movable lever 142 via the rod 220. The rod 220 is a metal ring formed in a substantially long hole shape, and is passed through a rod support hole 130 b formed in the shutter connecting plate 130 and formed at one end of the movable lever 142. It is also passed through a hole (not shown). The other end of the movable lever 142 is housed in the switch unit 140 and is provided so as to interlock with the operation of the drawstring 160.

  That is, when the pull string 160 is pulled downward, the movable lever 142 is configured to be pulled downward. When the movable lever 142 is pulled downward, the shutter connecting plate 130 is pulled in conjunction with the operation, and the shutter plate 120 is opened. When the pull string 160 is pulled downward again, the movable lever 142 is pulled downward, the shutter connecting plate 130 is pulled, and the shutter plate 120 is closed.

  FIG. 5 is a cross-sectional view of the ventilation fan according to the present invention, showing a state where the shutter plate is closed, and FIG. 6 is a perspective view showing a shutter support plate portion.

  As shown in FIG. 5, the shutter plate 120 is composed of three plates, ie, the uppermost upper shutter plate 121, the middle middle shutter plate 122, and the lowermost lower shutter plate 123. The three shutter plates are collectively referred to as a shutter plate 120. In the three shutter plates 120, the lower portion 121 c of the upper shutter plate 121 covers the upper portion 122 a of the middle shutter plate 122. Similarly, the lower portion 122 c of the middle shutter plate 122 covers the upper portion 123 a of the lower shutter plate 123. By doing so, the upper and lower gaps of each shutter plate 120 are covered, and there is no gap generated above and below each shutter plate, preventing light leakage from the outdoor side and intrusion of outside wind. . Each shutter plate 120 is formed in the same shape.

The shutter plate 120 has a central portion bent toward the indoor side. For example, the central portion 122b of the middle shutter plate 122 has a shape bent toward the indoor side as compared with the middle shutter plate upper portion 122a and the middle shutter plate lower portion 122c. This is to make the center of gravity of the shutter plate approximately vertically below the shutter hole 120a. When the shutter plate 120 operates in the opening direction with the shutter hole 120a as a fulcrum, the opening load of the shutter plate 120 is reduced by making the center of gravity vertically below the shutter hole 120a in this way. By reducing the opening load of the shutter plate 120, it is possible to reduce the force with which the user pulls the pull string 160 and to extend the life of the opening / closing mechanism of the shutter plate 120. In addition, by making the central portion of the shutter plate 120 bent to the indoor side in this way, when the shutter plate 120 is closed, the shutter plate 120 fits into the frame 10 and is outside the shutter plate 120. It is possible to eliminate fluttering of the shutter plate 120 due to wind or the like and abnormal noise associated with the fluttering. Furthermore, the outside of the ventilation fan has a compact shape, and the exterior appearance can be improved.

As shown in FIG. 6, a shielding wall 250 for preventing light leakage is provided in the vicinity of the protrusion 200 a of the shutter support plate 200. Since the shutter support plate 200 is made of resin, the shielding wall 250 can also be formed integrally. The shielding wall 250 is provided so as to protrude from the shutter support plate 200 to the inside of the frame body 10. The shape of the shielding wall 250 is a similar shape bent at the same location as the shutter plate 120. Specifically, the middle shutter plate 122 and the shielding wall 250 formed at the center of the shutter support plate 200 will be described, but the upper shutter plate 121 on the upper stage and the lower shutter plate 123 on the lower stage have the same configuration. The upper part 122a of the middle shutter plate and the upper part 250a of the shielding wall 250, the central part 122b bent to the indoor side of the middle shutter plate 122 and the central part 250b of the shielding wall 250, the lower part 122c of the middle shutter plate 122 and the lower part 250c of the shielding wall 250 Are relative to each other. Thus, by making the shape of each shutter plate 120 and the shielding wall 250 similar, when the shutter plate 120 is in a closed state, both sides of the shielding wall 250 and the shutter plate 120 overlap each other, so that no gap can be seen from the front. , Light leakage can be eliminated. In addition, it is possible to reduce the intrusion of outside wind.

A convex portion 250d that forms a minute space between the shielding wall 250 and the shutter plate 120 when the shutter plate 120 is closed is formed approximately in the middle between the upper portion 250a of the shielding wall 250 and the bent central portion 250b. Yes. The convex part 250d is formed in a square shape several steps higher than the surroundings. By forming the convex portion 250d in this manner, when the shutter plate 120 is closed, the shutter plate 120 and the shielding wall 250 are not in close contact with each other, and a slight gap is provided. This prevents the oil contained in the oily smoke from adhering to the shielding wall 250 and the shutter plate 120 and the shutter plate 120 and the shielding wall 250 from being fixed when the ventilation fan is used for exhausting the kitchen smoke and the like. By doing so, there is no problem in the operation of the shutter plate 120, and even if a ventilation fan is used for several years, the load of the pull string 160 that opens and closes the shutter plate 120 does not become heavy. Furthermore, when the shutter plate 120 is closed, the shutter plate 120 comes into contact with the resin convex portion 250d, and the closing sound of the shutter plate 120 can be reduced. Moreover, since it is made of resin, it is possible to absorb impact to some extent and prevent deformation of the shutter plate 120 and the like.

The height of the shielding wall 250 (the distance from the root portion of the shutter support plate 200 to the tip of the shielding wall 250) is about 10 mm or less. This is in order not to affect the characteristics such as the air volume of the ventilation fan. In particular, if the propeller blade 90 described above has resistance in the air path, the air volume is extremely reduced and noise such as abnormal noise is deteriorated. Therefore, when the orifice 170 is attached to the frame body 10, the height of the shielding wall is desirably 10 mm or less so that the shielding wall 250 does not protrude into the air passage portion where the orifice 170 is opened.

In the description, the three-stage three-plate shutter plate 120 made of steel plate and the resin shutter support plate 200 have been described. However, the present invention is not limited to this, and the shutter plate made of resin, one shutter plate, or made of steel plate The same can be applied to other shutter support plates.

  DESCRIPTION OF SYMBOLS 1 Exhaust fan, 10 frame body, 10a frame body upper surface part, 20 upper flange part, 30 left flange part, 40 right flange part, 50 lower flange part, 55 shutter part, 60, 60a, 60b fixed foot, 61, 62, 63 , 64 Motor fixing hole, 70 Motor, 71, 72, 73, 74 Motor flange, 80 Rotating shaft, 90 Fan, 100 Spinner, 110 Outside opening of frame body, 120 Shutter plate, 120a Shutter hole, 120b Side wall, 120c Stop pin insertion hole, 120d support pin, 121 upper shutter plate, 121a upper shutter plate upper part, 121c upper shutter plate lower part, 122 middle shutter plate, 122a middle shutter plate upper part, 122b middle shutter plate central part, 122c middle shutter plate lower part, 123 Lower shutter plate, 123a S Upper shutter plate, 123c Lower shutter plate lower, 130 Shutter connection plate, 130a Shutter connection plate support hole, 130b Rod support hole, 130c Spring support hole, 140 Switch part, 142 Movable lever, 150 Power cable, 152 Lead wire, 154 Plug , 160 Pull string, 170 Orifice, 180 Fan bolt, 190 Mounting piece, 200 Shutter support plate, 200a Projection, 210 Bush, 210a Stop pin, 220 Rod, 230 Spring, 250 Shielding wall, 250a Shielding wall upper part, 250b Shielding wall center Part, 250c lower part of shielding wall, 250d convex part

Claims (5)

A rectangular frame opening on the indoor side and the outdoor side;
A shutter support plate provided in the longitudinal direction on the inside of the outdoor side of the frame,
A plurality of shutter plates that are supported in a freely rotating manner via a support shaft on the shutter support plate, and are formed in a horizontally long shape that always receives an action of closing.
Opening and closing means for connecting and opening and closing the plurality of shutter plates;
The shutter plate is provided with a bent portion in which a substantially central portion in the vertical direction is bent toward the indoor side,
A ventilating fan, wherein the shutter support plate is provided with a shielding wall that overlaps both side surfaces of the shutter plate when the shutter plate is closed.   The ventilating fan according to any one of claims 1 to 6, wherein the shutter plate is configured to have a shape in which an outdoor side of the shutter plate is substantially contained in the frame body when the shutter plate is closed.   The ventilating fan according to any one of claims 1 to 2, wherein a convex portion for obtaining a minute space is formed on the shielding wall between the shielding wall and the shutter plate when the shutter plate is closed.   The ventilation fan according to any one of claims 1 to 3, wherein the shutter support plate is made of resin and formed integrally with the shielding wall.   The ventilation fan according to any one of claims 1 to 4, wherein a height from the shutter support plate to a tip of the shielding wall is formed within about 10 mm.

Images