JP6893297B2 - Ventilation device - Google Patents

Description

The present invention relates to a ventilator with an electric shutter.

Conventionally, a ventilator having an electric shutter that opens and closes in conjunction with the operation of the ventilator is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-116897

In such a conventional ventilation device, in order to reduce the power consumption, it is necessary to reduce the power consumption of the solenoid, which is a device for opening and closing the electric shutter, and smooth opening and closing of the electric shutter is effective. ..

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to reduce the power consumption of the ventilation device by facilitating the opening and closing of the electric shutter.

In order to achieve this object, the ventilation device according to the present invention is a ventilation device provided with an electric shutter that opens and closes an air passage, and the electric shutter has an annular rectangular shape and has a central opening. A shutter frame serving as an air passage, a plurality of blades having a rectangular shape and having rotation axes at both ends in the longitudinal direction, and an opening / closing structure for opening and closing the air passage by rotating the blades around the rotation axis. The shutter frame is provided with a portion of the blade that is located on the outer periphery of both ends in the longitudinal direction, and an indoor side that is upstream of the blade from a portion located on the outer periphery and ends of the blade. The blade is provided with a portion that hangs on the portion, and the line connecting the rotation axes at both ends is brought closer to one side in the lateral direction of the blade to provide the rotation axis so that the longitudinal directions of the two rectangular plates are matched. It has a shape in which planes are joined by shifting the lateral direction vertically, and includes an upper thin-walled portion, a lower thin-walled portion, and a thick portion sandwiched between the upper thin-walled portion and the lower thin-walled portion. The upper thin portion engages with the lower thin portion of the adjacent blade in the closed state of the air passage, and the upper thin portion or the lower thin portion is located on the upstream side from both ends in the longitudinal direction. A leak-preventing rib is provided so as to project in the direction of a portion of the shutter frame that hangs on the end of the shutter frame.
It is a ventilation device provided with inclined surfaces that gradually incline to both end sides as the inner surfaces facing each other protrude, thereby achieving the intended purpose.

According to the present invention, the power consumption of the ventilation device can be reduced by facilitating the opening and closing of the electric shutter.

An exploded perspective view showing a ventilation device according to the present invention. Perspective view of the electric shutter from the outside Perspective view of the blade from the outside Side view schematically showing the opening and closing operation of the blade Front view of only multiple blades of the electric shutter seen from the indoor side A cross-sectional view schematically showing a blade and a shutter frame seen from the bottom surface of an electric shutter.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for the purpose of understanding the present invention. The following embodiments are examples that embody the present invention, and do not limit the technical scope of the present invention. In addition, the same parts are designated by the same reference numerals throughout the drawings, and the second and subsequent explanations are omitted.

(Embodiment 1)
As shown in FIG. 1, the ventilation device 2 according to the first embodiment is installed, for example, on the wall surface of the room 1. The ventilation device 2 includes a rectangular resin frame 3 on the rear side (right side in FIG. 1), that is, on the outdoor side.

A tubular suction port 6 is provided in the central portion of the frame 3, and an AC or DC motor 5 having a propeller fan 4 is provided in a substantially central portion of the suction port 6.

The propeller fan 4 is provided on a concentric circle with the suction port 6.

An orifice 8 having, for example, a circular opening 7 is provided in the front of the suction port 6 (left side in FIG. 1), that is, on the indoor 1 side, substantially in the center of the frame 3.

An electric shutter 9 that is electrically opened and closed is provided in front of the orifice 8, that is, on the indoor 1 side, in engagement with the frame 3. The electric drive is not performed by the electric shutter 9 itself, but is performed by interlocking with the electric drive of the sliding portion 30 provided on the frame 3 and sliding in the vertical direction in the drawing.

A slit 10 is provided in front of the orifice 8 at a substantially central portion, and a louver 11 which is made of resin and has a rectangular frame is provided so as to cover the frame 3.

A solenoid (not shown) that operates when opening and closing the electric shutter 9 is provided in the frame 3, and the sliding portion 30 slides in the vertical direction in conjunction with the solenoid.

As shown in FIG. 2, the electric shutter 9 includes a shutter frame 14, a blade 17, and an opening / closing structure.

The shutter frame 14 has an annular rectangular shape. The annular rectangular shape is a shape in which the outer shell is substantially square and has a central opening inside. The central opening here does not have to be in the center of the rectangle, as long as it fits inside the frame.

The central opening forms a ventilation path during ventilation.

The blade 17 has a rectangular shape and is plate-shaped. A plurality of blades 17 are provided so as to close the central opening. The blade 17 has rotating shafts 16 at both ends, and the plate-shaped flat surface is positioned parallel to the air passage by rotating the rotating shaft 16 to open the air passage, and the plate-shaped flat surface is blown. The air passage can be closed by positioning it perpendicular to the path. The transition between the open state and the closed state by the blade 17 is performed by the opening / closing structure.

The opening / closing structure includes a movable shaft 22, a lever 15, a spring 12, a shutter frame spring hooking portion 13, and a lever spring hooking portion 18.

The movable shaft 22 is connected so as to be interlocked with the rotating shaft 16 provided on the blade 17. That is, by rotating the movable shaft 22 along the circumference of the rotating shaft 16, the blade 17 can be rotated about the rotating shaft 16. The movable shaft 22 is connected to a plurality of blades 17 and ends of the blades 17 in the same direction.

The movable shaft 22 is rotatably connected to the lever 15. Regarding the rotation of the movable shaft 22 with respect to the lever 15, for example, the end of the movable shaft 22 opposite to the blade 17 has a cylindrical protrusion shape, and the cylindrical protrusion is provided in the lever 15. Or it is done by inserting it into a hole. As a result, when the lever 15 is linearly moved, the movable shaft 22 can rotate about the rotating shaft 16. In other words, the lever 15 can convert the linear movement into rotation about the rotation shaft 16 of the movable shaft 22. The lever 15 includes a receiving portion 31 that receives the vertical movement of the sliding portion 30 shown in FIG. 1, that is, a linear movement. The receiving portion 31 can linearly move the lever 15 in the vertical direction based on the movement of the sliding portion 30.

The lever 15 includes a protruding lever spring hooking portion 18 that hooks and locks one end of the spring 12 at the upper portion in FIG. 2, that is, in the vicinity of the receiving portion.

The spring 12 is, for example, a coil-shaped spring, and the annular portion provided at one end is provided at the lever spring hooking portion 18 and the annular portion provided at the other end is provided below the shutter frame 14 (lower part in FIG. 2). It is connected (locked) to the shutter frame spring hooking portion 13. When the lever 15 moves upward by the solenoid, the blade 17 is opened, and at this time, the spring 12 expands, so that an elastic force in the contraction direction is generated. That is, when the blade 17 is in the open state, the spring 12 acts in the direction of shifting the blade 17 to the closed state.

The shutter frame spring hooking portion 13 is fixed below the shutter frame 14, and the other end of the spring 12 is connected.

Next, the blade 17 will be described.

As shown in FIG. 3, the rotating shafts 16 provided at both ends of the blade 17 have a columnar shape.

The line 32 connecting the rotation shafts 16 at both ends of the blade 17 is arranged close to one side in the direction of the short side 21 of the blade 17. In FIG. 3, the line 32 is provided so as to be close to the upper side in the lateral direction. And FIG. 3 coincides with the vertical direction when the ventilation device 2, that is, the electric shutter 9 is installed on the wall surface. Therefore, when the electric shutter 9 is installed on the wall surface, the rotating shaft 16 is arranged so that the upper area A'divided by the wire 32 is smaller than the lower area B'.

In other words, when the ventilation device 2 is attached to the wall surface and the electric shutter 9 is closed and the blade 17 is viewed from the outdoor side, A: B (A <B) from the upper end of the short side 21 of the blade 17. A straight line (line 32) in the longitudinal direction is provided at such a position.

FIG. 4 is a side view of the blade 17 as viewed from the direction of arrow 33 in FIG.

The blade 17 has an engaging structure in which two rectangular plates 34 and 35 are substantially aligned in the longitudinal direction and are displaced in the vertical direction, that is, in the lateral direction to connect the flat surfaces 36. More specifically, the rectangular plate 34 on the indoor 1 side is located above, and the rectangular plate 35 on the outdoor side is located below the rectangular plate 34. Due to this shape, the upper thin portion 37 is sandwiched between the upper thin portion 37, the lower thin portion 38 below, and the upper thin portion 37 and the lower thin portion 38 in the lateral direction of the blade 17, and the thick portion 39 is formed.

The solid line shows the state in which the electric shutter 9 is closed, that is, the closed state. From that state, the blade 17 rotates 90 degrees around the rotation axis 16 (counterclockwise in FIG. 4) to open the electric shutter 9. It shifts to the open state (indicated by the broken line). Further, as described above, when the ventilation device 2 is attached to the wall surface and the electric shutter 9 is closed, the rotating shaft 16 is at a position where A: B (A <B) is formed from the end of the short hand 21 above the blade 17. It is provided in. More specifically, it is a rectangular plate 34 on the indoor 1 side located above, and a rotating shaft 16 is provided on a thick portion 39. That is, the rotating shaft 16 is provided above the blade 17 on the indoor 1 side.

With such a configuration, as shown in FIG. 2, when the electric shutter 9, that is, the plurality of blades 17 is opened, the solenoid operates to lift the sliding portion 30 upward, thereby receiving the sliding portion 30. The lever 15 is lifted upward by lifting the portion 31. When the lever 15 is lifted, the spring 12 hooked on the lever spring hooking portion 18 is extended upward, and as shown in FIG. 4, the movable shaft 22 rotates 90 degrees around the rotation shaft 16 to cause the blade 17 to rotate. It rotates 90 degrees around the rotation shaft 16.

At this time, the force due to the weight of the blade 17, that is, the weight corresponding to the volume of the blade 17 above the rotation shaft 16, acts in the same direction as the direction in which the blade 17 rotates. Therefore, the force required to open the plurality of blades 17 shown in FIG. 2, that is, the electric shutter 9, can be reduced, and for example, the power consumption of the solenoid, which is a drive unit for opening and closing the electric shutter 9, can be reduced. Become.

Further, by setting the ratio of A and B shown in FIG. 3 to A <B, for example, A: B = 1: 2, the outside wind tried to flow into the room 1 from the outside through the inside of the suction port 6. In this case, the outside wind collides with the surfaces (surface A'and surface B') of the blade 17 to prevent the outside wind from flowing into the room 1. At this time, the force that the outside wind hits the surface A'and pushes the blade 17 is a force that tries to rotate the blade 17, that is, a force that tries to open the electric shutter 9. On the other hand, the force that the outside wind hits the surface B'and pushes the blade 17 acts in the direction of rotation when the blade 17 closes, and becomes a force that tries to close the electric shutter 9. As a result, since A <B, the area of A'is <B', and the force of closing the electric shutter 9 is larger than the force of opening the electric shutter 9. Therefore, the airtightness can be maintained without opening the electric shutter due to the outside wind.

When the thickness of the blade 17 is uniform and the ratio of A and B shown in FIG. 4 described above is A ≧ B, one blade 17 in a state where the ventilation device 2 is attached to the wall surface and the electric shutter 9 is closed. The weight of the volume above the rotating shaft 16 is heavier than the weight of the volume below. Therefore, in the force due to the weight of the blade 17, the ratio of A and B becomes larger than when A <B, and the force required to open the plurality of blades 17 shown in FIG. 2, that is, the electric shutter 9 becomes larger. It will be reduced.

However, assuming that the ratio of A and B is A ≧ B, the area of A ≧ B ′ shown in FIG. 3 is obtained. Therefore, when the outside wind tries to flow into the room 1 from the outdoor side through the inside of the suction port 6 as described above, the electric shutter 9 is opened by the force for closing the electric shutter 9. The electric shutter may open due to the outside wind, and it may not be possible to maintain airtightness.

By the way, when the air passage is closed, the upper thin portion 37 engages with the lower thin portion 38 of the adjacent blade 17. As a result, the gap between the blades 17 is reduced, and the force when the wind blows is dispersed into the force acting in the closed state and the force acting in the open state, and the balance between them enhances the robustness of the shutter itself.

However, by providing the thin portion, a small gap is generated between the blade 17 and the shutter frame 14. Further, play for overlapping the blades 17 is required, and these plays reduce the degree of sealing of the electric shutter 9.

Therefore, the lower thin-walled portion 38 is provided with a leak prevention rib 19.

As shown in FIGS. 5 and 6, the leakage prevention ribs 19 are provided at both ends of the lower thin wall portion 38 in the longitudinal direction so as to project in the direction of the shutter frame 14. More specifically, when the rectangular plate 34 is located on the indoor 1 side and the rectangular plate 35 is located on the outdoor side, the leak prevention rib 19 is formed from the thin portion formed by the rectangular plate 35 on the outdoor side to the indoor 1 It is provided so as to project toward the rectangular plate 34 side.

With this configuration, the outside wind (arrow shown in FIG. 6) flowing between the gap 23 and the shutter frame 14 generated in the thin portion of the plurality of blades 17 is dammed by the leakage prevention rib 19. Therefore, when the plurality of blades 17 are in the closed state, the airtightness can be maintained by suppressing the inflow of the outside air from the outside into the room 1.

The leak prevention rib 19 may be provided with an inclined surface 20 whose inner surfaces facing each other gradually incline in the directions toward both ends as they protrude.

With this configuration, the thin portion of the adjacent blade 17 is positioned so as to be sandwiched between the two leakage prevention ribs 19 when shifting to the closed state, but at this time, the thin portion interferes with the leakage prevention rib 19. It fits perfectly. That is, the thin portion of the adjacent blade 17 fits while contacting the inclined surface 20, and the plurality of blades 17 overlap and adhere to each other. Therefore, by providing play, the force for opening the electric shutter 9 is reduced. However, the airtightness can be maintained.
(Modification example)
In the above embodiment, the point that the blade 17 is formed of two rectangular plates has been described, but it is not necessary to bond the two rectangular plates together in the actual manufacturing process, and even if the blades 17 are integrally formed of resin, the above-mentioned Included in the engagement structure.

Further, although the vertical direction when the ventilation device is installed on the wall surface is shown as vertical, it may be arranged on the ceiling surface, for example. Even in this case, the leakage prevention ribs and the inclined surface can exert the above-mentioned functions.

Further, the leakage prevention rib 19 is provided in the lower thin wall portion 38. In the blade 17 in the above embodiment, the rectangular plate 34 on the indoor 1 side is located above, and the rectangular plate 35 on the outdoor side is the rectangular plate 34. This is because it is located below. Therefore, when the rectangular plate 34 on the indoor 1 side is located below and the rectangular plate 35 on the outdoor side is located above the rectangular plate 34, the leakage prevention rib 19 is provided on the upper thin portion 37.
(Outline of Invention)
When the electric shutter opens, that is, when the blade rotates 90 degrees around the rotation axis, the force due to the weight of the blade acts in the direction in which the blade rotates, thus reducing the force for opening the electric shutter. be able to. Furthermore, even when the outside wind pushes the blade from the outside through the tubular part of the frame when the electric shutter is closed, the force that tries to close the electric shutter opens the electric shutter. Since it is larger than the force to force the shutter, the electric shutter can maintain airtightness without being opened by the force of the outside wind. As a result, the power consumption of the solenoid can be reduced and the power consumption of the ventilation device can be reduced by reducing the suction force of the solenoid while maintaining the airtightness.

Further, since the outside wind passing through the gaps at both ends in the longitudinal direction of the blade is blocked, the airtightness of the electric shutter can be maintained.

Further, when the electric shutter is closed, the slope of the leakage prevention rib smoothly guides the adjacent blades, so that the blades can overlap and adhere to each other without resistance, and the airtightness of the electric shutter can be maintained. ..

Since the ventilation device according to the present invention can reduce power consumption, it is also useful as a ventilation fan or the like used in a kitchen or the like.

1 Indoor 2 Ventilation device 3 Frame 4 Propeller fan 5 Motor 6 Suction port 7 Opening 8 orifice 9 Electric shutter 10 Slit 11 Louver 12 Spring 13 Shutter frame Spring hook 14 Shutter frame 15 Lever 16 Rotating shaft 17 Blade 18 Lever Spring hook 19 Leakage prevention rib 20 Inclined surface 21 Short hand 22 Movable shaft 23 Gap 30 Sliding part 31 Receiving part 32 Line 33 Arrow 34,35 Rectangular plate 36 Flat surface 37 Upper thin part 38 Lower thin part 39 Thick part

Claims (2)

A ventilation system equipped with an electric shutter that opens and closes the air passage.
The electric shutter is
A shutter frame having an annular rectangular shape with the central opening as the air passage, and
A plurality of blades having a rectangular shape and having rotation axes at both ends in the longitudinal direction,
It is provided with an opening / closing structure for opening / closing the air passage by rotating the blade around the rotation axis.
The shutter frame is
A portion of the blade located further on the outer periphery than both ends in the longitudinal direction,
A portion that is on the indoor side that is upstream of the blade from a portion located on the outer periphery and that hangs on the end of the blade is provided.
The blade
The line connecting the rotation shafts at both ends is brought closer to one side in the lateral direction of the blade to provide the rotation shaft .
It has a shape in which the longitudinal directions of the two rectangular plates are matched and the planes are joined by shifting the lateral direction vertically, and the upper thin portion, the lower thin portion, the upper thin portion, and the lower thin portion are joined. It is provided with a thick portion sandwiched between the two, and has an engaging structure in which the upper thin portion engages with the lower thin portion of an adjacent blade when the air passage is closed.
The upper thin-walled portion or the lower thin-walled portion
It is provided with a leakage prevention rib located on the upstream side from both ends in the longitudinal direction and projecting in the direction of a portion of the shutter frame that hangs on the end portion.
The leak prevention rib
A ventilator having inclined surfaces that gradually incline to both ends as the inner surfaces facing each other protrude. When installing the electric shutter on the wall surface
A line connecting the rotation axis of the two ends, according to claim 1 for dividing a lateral direction of the blade so it is smaller in the upper area than the lower side of the rotary shaft at the time of installation of the electric shutter Ventilation device described in.

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