JPH11190543A - Ventilation fan for duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress penetration of unnecessary external air to the interior of a room as much as possible. SOLUTION: A shutter plate 33 is rotatably supported at the right end part of a cylindrical part 21a of an air supply opening body 21. The shutter plate 33 is ordinarily situated in a vertical position, and during drive of a fan device, external air flows through a cylindrical part 21a from an opening part 29 after a flow of it through a passage C. When, with a fan device being in a stop state, strong air from the outside of a house is blown in an air supply duct 22, the shutter plate 33 is rotated in the direction of an arrow mark B by outside air and closes the opening part 29, whereby outside air is prevented from entrance of it to the interior of the cylindrical part 21a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct ventilation fan having a shutter member for closing an opening of an air supply opening.

[0002]

For example, a duct ventilation fan provided on a ceiling portion of a bathroom has a main body accommodating a fan device therein, and a cylindrical exhaust port body and a cylindrical air supply port. The body is connected. Then, the air (humidity) in the bathroom is exhausted to the outside through the exhaust port by driving the fan device, and accordingly, the outdoor air is supplied into the bathroom through the air supply port. The bathroom is ventilated (dry)
It is configured to be.

[0003] The configuration of the air supply port will be described with reference to FIG. As shown in FIG. 9, the air supply port body 1 is provided with a cylindrical portion 1 a whose diameter gradually decreases from the main body on the left side in the drawing to the outdoor side on the right side in the drawing. Also,
An air supply duct 2 communicating with the outside is fitted on the outer periphery of the cylindrical portion 1a.

[0004] A shutter plate 3 is rotatably supported at the outdoor end of the cylindrical portion 1a. in this case,
The shutter plate 3 is pivotally supported above its center of gravity, and when no force is applied, the shutter plate 3 is positioned vertically (the state shown by the solid line in FIG. 9). It is configured to close the opening 4 of 1a. This prevents external air from flowing into the bathroom through the air supply opening 1.

In such a construction, when the fan device is driven and the air in the bathroom is exhausted to the outside and the pressure in the bathroom becomes negative, as shown by a two-dot chain line in FIG. 1 rotates in the direction of arrow A to open the opening 4. Thus, outdoor air is taken into the bathroom.

However, in the case of the above configuration, even when the fan device is not driven, a strong wind blows into the air supply duct 2 from the outside and the wind hits the shutter plate 3, so that the shutter plate 3 is not driven. It turns in the direction of arrow A, and the opening 4 is opened. In particular, when such a phenomenon occurs in a cold winter season, there is a problem that cool air flows into the bathroom and the temperature in the bathroom decreases.

Accordingly, an object of the present invention is to provide a ventilation fan for a duct capable of minimizing unnecessary outside wind from entering a room.

[0008]

According to a first aspect of the present invention, there is provided a duct ventilation fan having an exhaust port and an air supply port, the main body communicating with a room, and the exhaust port being disposed in the main body. A fan device for discharging the air in the room to the outside through the air supply port; an air supply port provided on the outer surface of the main body to communicate the air supply duct with the air supply port communicating with the outside; A shutter member provided at an end of the air supply body on the air supply duct side and configured to be displaced from an outer position to an inner position by an outdoor wind flowing into the air supply duct; The end of the air supply body on the air supply duct side is configured to be smaller in diameter than the air supply duct so that an opening having an abutting portion is formed, and when the shutter member is at an outer position, the air supply duct is closed. A passage is formed between the inner surface of the air duct and the inside of the air supply duct to communicate with the opening. Configured to, when in the inner position characterized in was configured so as to close the opening portion in contact with the contact portion.

According to this configuration, when a strong wind blows into the air supply duct from outside and hits the shutter member,
Since the shutter member is displaced to the inside position and closes the opening of the air supply opening, it is possible to prevent outside air from flowing into the room through the air supply opening. In addition, when the shutter member is normally at the outer position, the opening communicates with the inside of the air supply duct through the passage. For example, when the fan device is driven to dry the room, It is possible to supply outdoor air to the room.

In this case, the shutter member is configured so as to be displaced between an inner position and an outer position by turning, or is moved in parallel with the direction in which the air supply opening extends so that the shutter member is moved to the inner position. It may be configured so as to be displaced between the outside position (the invention of claim 2 and claim 3).

Further, a rib may be formed on the outdoor surface of the shutter member (the invention of claim 4), or a concave portion which is convex toward the main body may be provided on the outdoor surface of the shutter member. The invention according to item 5), the shutter member efficiently receives the wind blown into the air supply duct from the outside and is easily displaced to the inside position, so that it is possible to reliably prevent the outside wind from entering the bathroom.

Further, it is desirable that a cushion member is provided in the contact portion (the invention of claim 6). According to such a configuration, the noise generated when the shutter member is displaced to the inner position and comes into contact with the contact portion can be absorbed by the cushion member.

By the way, conventionally, a shutter member provided at an air supply opening of a ventilation fan for a duct is usually configured to close an opening of the air supply opening. Therefore, as in the case of the ventilation fan for a duct according to the present invention, if the shutter member is normally located outside and the opening is open, the user may misunderstand that the product is defective. Therefore, in order to eliminate such misunderstanding, it is advisable to write on the outdoor surface of the shutter member a character which indicates that the shutter member is normally located at the outside position (the invention of claim 7).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to, for example, a duct ventilation fan provided on a ceiling portion of a bathroom will be described below with reference to FIGS. First,
FIG. 4 shows the entire configuration of the duct ventilation fan 1, and the duct ventilation fan 11 is provided corresponding to the opening 12 a provided in the ceiling 12 of the bathroom.

The central portion of the duct ventilation fan 11 is a main body 14 that houses a fan device 13 therein.
The upper body 15, the lower body 16, and the outer frame 17 are integrally combined. An exhaust port 18 is provided between the upper body 15 and the lower body 16 on the left side of the main body 14 in FIG.
An air supply port 19 is provided between the outer frame 5 and the outer frame 5.

An exhaust port body 20 is disposed on the left side of the main body 14 in FIG. The exhaust port body 20 includes a cylindrical portion 20a extending from the exhaust port 18 toward the left side in FIG.
An exhaust duct (not shown) communicating with the outside is connected to the cylindrical portion 20a. An air supply opening 21 is provided on the right side of the main body 14 in FIG. 4 so as to correspond to the air supply opening 19. The air supply port body 21 is provided with a cylindrical portion 21a extending from the air supply port 19 to the right side in FIG. 4, and an air supply duct 22 (FIG. 1) communicating with the cylindrical portion 21a outdoors. See).

The main body 14, the exhaust port body 20, and the air supply port body 21 are arranged on the back side (upper side in FIG. 4) of the ceiling 12 as follows. That is, flanges 14a, 20b, and 21b that protrude outward are provided at lower ends of the main body 14, the exhaust port body 20, and the air supply port body 21, respectively. Then, with the flange 20b of the exhaust port body 20 and the flange 21b of the air supply port body 21 disposed at predetermined positions on the bathroom side surface of the ceiling 12, the main body 14 is opened to the opening of the ceiling 12. 12a from the bathroom side, and the flange 14a of the main body 14 is
Along with b and 21b, screws are screwed to the ceiling 12 around the opening 12a.

A rectangular panel 2 is provided on the bathroom-side surface of the ceiling 12 so as to be located below the opening 12a.
3 are arranged. The panel 23 is provided with a plurality of protrusions 24. At the upper ends of these protrusions 24, a rectangular frame-shaped mounting portion 24a having a U-shaped cross section is provided. Are the collars 14a, 20b,
21b. A hook 25 is provided on the upper surface of the panel 23. The hook 25 is urged upward together with the panel 23 by a torsion coil spring (not shown) provided at a lower portion of the main body 14. It is configured to: Thereby, the mounting portion 24
a is pressed against the ceiling 12, and the ceiling 12 is
3, an exhaust gap X is formed.

On the other hand, the fan device 13 is disposed in a space between the upper main body 15 and the lower main body 16 in the main body 14. In this case, a fan motor 13a of the fan device 13 is fixed to the upper main body 15, and a shaft 13b extending downward from the fan motor 13a has a blower fan 13a.
c is attached. A suction port 26 is formed in a portion of the lower main body 16 facing the blower fan 13c.

Further, a partition wall 27 extending from the upper main body 15 to the upper surface of the panel 23 is provided on the right side of the lower main body 16 in FIG. This partition wall 27 allows the main body 1
The inside of 4 is partitioned into an exhaust side that connects the exhaust gap X to the exhaust port 18 and an air supply side that connects the supply gap Y separated from the exhaust gap X to the air supply port 19. .

Now, the air supply opening 21 will be described with reference to FIGS. First, as shown in FIG.
The cylindrical portion 21a is configured such that its diameter decreases stepwise from the main body 14 side to the outside. The air supply duct 22 is fitted to the outer peripheral surface of the central portion of the cylindrical portion 21a, the diameter of which is reduced by one step from the main body 14 side. Accordingly, a space is formed between the air supply duct 22 and the right end of the cylindrical portion 21a where the diameter is minimum.

On the right end face of the cylindrical portion 21a, a vertical shielding plate 28 is provided integrally at the upper portion, and the remaining portion is formed as an opening portion 29 inclined toward the main body 14 side. I have. Further, a pair of bearing portions 30 is located on the inner surface at the right end of the cylindrical portion 21a at a position below the shielding plate 28.
(Only one is shown in FIG. 1).

As shown in FIG. 3, a portion of the right end surface of the cylindrical portion 21a located below the bearing portion 30 is bent inward to form an edge portion serving as a contact portion of the opening portion 29. 2
1c. A substantially semicircular filter member 31 is attached to the edge 21c via a cushion member 32 such as a sponge, for example, by adhesion. The filter member 31 can prevent dust, insects, and the like from entering the tubular portion 21a from the opening 29.

As shown in FIG. 2, the pair of bearings 3
At 0, a shutter plate 33 as a shutter member having a shape corresponding to the shape of the opening 29 is rotatably supported via a shaft 33a. The shutter plate 33 is normally at a vertical position as an outer position (a position indicated by a solid line in FIG. 1), and when it is rotated in the direction of arrow B, it is displaced to an inner position and abuts on the cushion member 32. Opening 2
9 is closed. Therefore, in the present embodiment, the cushion member 32 functions as a contact portion instead of the edge portion 21c. When the shutter plate 33 is in the vertical position, at least the lower end portion, specifically, a peripheral portion excluding the upper end portion is configured to be located away from the inner surface of the air supply duct 22. Between the air supply duct 22 and the inner surface of the air supply duct 22,
Is formed so as to form a passage C communicating with the passage.

In the above configuration, when the fan device 13 is driven, the air in the bathroom is sucked into the main body 14 through the exhaust gap X between the ceiling 12 and the panel 23, and
6. Exhaust port 18; cylindrical portion 20a of exhaust port body 20; When the degree of airtightness in the bathroom is high, the interior of the bathroom has a negative pressure due to the above-described exhaustion, so that outdoor air is taken into the bathroom through the air supply duct 22.

At this time, the shutter plate 33 and the air supply duct 2
2, the outdoor air flows into the cylindrical portion 21 a of the air supply opening 21 from the opening 29 through the passage C as shown by an arrow D in FIG. 1. Then, the air that has flowed into the cylindrical portion 21 a flows from the air supply port 19 to the main body 14.
It flows inside and flows into the bathroom through the air supply gap Y between the ceiling 12 and the panel 23.

On the other hand, when a strong wind from the outside blows into the air supply duct 22 with the fan device 13 stopped, the outside wind hits the shutter plate 33. Then, the shutter plate 2 is pressed by the pushing force of the outside wind.
3 rotates in the direction of arrow B and comes into contact with the cushion member 32. As a result, the opening 29 is closed, and the outside wind is prevented from flowing into the cylindrical portion 21a.

According to this structure, the shutter plate 33 is in the vertical position and the opening 29 is open at the normal time when the outside air is not blown, and the air flows through the passage C. It is configured to be possible. Therefore, when a negative pressure is generated in the bathroom due to the driving of the fan device 13, the outside air flows into the cylindrical portion 21 b from the opening 29 through the passage C, so that the outside air can be taken into the bathroom. On the other hand, when the fan device 13 is stopped. When outside wind blows strongly into the air supply duct 22 from outside,
The external wind rotates the shutter plate 33 and the air supply opening 21
Since the opening 29 of the cylindrical portion 21b is closed, it is possible to prevent the outside air from unnecessarily flowing into the bathroom through the air supply opening 21.

Further, in this embodiment, a cushion member 32 is provided in the opening 29 to receive the outside air and to release the shutter plate 3.
When the rotating member 3 rotates, the opening portion 29 is closed by contacting the cushion member 32. Therefore, generation of noise when the opening 29 is closed by the shutter plate 33 can be prevented.

FIG. 5 shows a second embodiment of the present invention. Differences from the first embodiment will be described. still,
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 5 shows a side view (a) and a front view (b) of the shutter plate 33. As shown in these figures, in the second embodiment, a rib 41 protruding toward the outdoor side is provided on the outdoor side surface of the shutter plate 33. In this case, the rib 41 is provided at an edge of a portion of the shutter plate 33 located below the bearing portion 29 (see FIG. 2).

According to such a configuration, the shutter plate 33 can efficiently receive the external wind blown into the air supply duct 22 from the outdoor side. That is, even if the outside wind that hits the shutter plate 33 tries to flow out of the shutter plate 33 along the shutter plate 33, the flow is blocked by the rib 41. Therefore, compared with the configuration in which the ribs 41 are not provided, a larger amount of outside air can be kept on the surface of the shutter plate 33. Therefore, the shutter slope 33 can efficiently receive the blown external wind, and as a result, the shutter plate 33 is reliably rotated to close the opening 29,
The outside air can be reliably prevented from flowing into the bathroom.

FIG. 6 shows a third embodiment of the present invention. Differences from the first embodiment will be described. still,
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 6 shows a side view (a) and a front view (b) of the shutter plate 33. As shown in these figures, in the third embodiment, a concave portion 42 that is convex toward the main body is formed in the shutter plate 33. Even in such a configuration, similarly to the above-described second embodiment, the shutter hill 33 can efficiently receive the outside air, and the effect of reliably preventing the outside air from flowing into the bathroom can be obtained. .

FIG. 7 shows a fourth embodiment of the present invention. Differences from the first embodiment will be described. still,
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 7 shows a front view of the shutter plate 33. As shown in FIG. 7, on the outdoor side surface of the shutter plate, a letter “The shutter is closed when the outside wind is strong”, that is, a precautionary note 43 is written.

Conventionally, a shutter plate provided on an air supply port of a duct ventilation fan usually has a structure for closing an opening of the air supply port. Therefore, if the opening 29 is not normally closed by the shutter plate 33 as in the above configuration, the user may misunderstand that the product is defective. Therefore, the user's misunderstanding can be eliminated by writing the cautionary note 43 of the above content on the shutter plate 33 in advance.

FIG. 8 shows a fifth embodiment of the present invention. Differences from the first embodiment will be described. still,
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 8 shows a vertical side view of the air supply opening 21. In the fourth embodiment, the right end surface of the cylindrical portion 21a of the air supply opening 21 is flush with the opening portion 45 and is entirely open. Then, a filter member 46 is attached to the entire opening 45.

At the right end of the cylindrical portion 21a, a container-like shutter member 47 for covering the opening 45 is provided. An annular member 4 is provided on the outer peripheral portion at the right end of the cylindrical portion 21a.
A coil spring 49 is provided between the inner bottom surface of the shutter member 47 and the annular member 48. The shutter member 47 is formed by the coil spring 49.
Is biased to the outdoor side and is located at an outer position (the position shown in FIG. 8).

At the left end of the shutter member 47 in FIG. 8, a plurality of claws 50 projecting inward are provided. In the right end portion of the cylindrical portion 21a, a hole portion 51 is provided on the outer peripheral surface on the right side of the annular member 48 in correspondence with the claw portion 50 (one claw portion in FIG. 8). 50 and holes 51). The claw portion 50 has a hole portion 51.
The movement of the shutter member 47 is regulated by this.

When the claw portion 50 is located closest to the main body in the hole portion 51, the inner bottom surface of the shutter member 47 is configured to contact the right end surface of the cylindrical portion 21a.
Therefore, in the present embodiment, the right end surface of the cylindrical body 21a functions as the contact part 21d. Also, the shutter member 47
The opening 45 is substantially completely sealed when the inner bottom surface of the opening comes into contact with the contact portion 21d of the cylindrical portion 21a.

At this time, a predetermined space is defined between the inner peripheral surface of the shutter member 47 and the outer peripheral surface of the cylindrical portion 21a and between the outer peripheral surface of the shutter member 47 and the inner peripheral surface of the air supply duct 22. This space is defined as a passage E that communicates with the opening 45 in the air supply duct 22.

According to such a configuration, normally, the shutter member 47 is located at the outer position by the spring force of the coil spring 49 and the opening 45 is open, so that the arrow F The outside air can circulate as shown by. On the other hand, when the outside air blows into the air supply duct 22 when the fan device 13 is stopped,
The outside wind hits the outdoor surface 47a of the shutter member 47 and pushes the shutter member 47 toward the main body 14. as a result,
The shutter member 47 moves toward the main body 14 against the urging force of the coil spring 49. Then, the inner bottom surface of the shutter member 47 contacts the contact portion 21c of the tubular body 21a, and the opening 45
Close. Therefore, the outside air is prevented from flowing into the cylindrical portion 21a, and the outside air is prevented from flowing into the bathroom.

In this case, the contact portion 21 of the cylindrical portion 21a
c may be provided with a cushion member. It is also a good configuration to provide a rib or a concave portion on the outdoor surface 47a of the shutter member 47.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the cushion member may be made of various materials such as sponge and rubber made of non-woven fabric. is there.

[0043]

As is apparent from the above description, according to the duct ventilation fan of the present invention, the end of the air supply opening body that connects the air supply opening of the main body and the air supply duct is provided on the air supply duct side end. A shutter member configured to be displaced from an outside position to an inside position by an outdoor wind flowing into the air supply duct is provided, and a passage between the shutter member and the air supply duct is provided when the fan device is driven. When a strong wind blows into the air supply duct from outside when the fan device is stopped, the shutter member is displaced to the inside position by the wind to close the opening. Therefore, there is an excellent effect that unnecessary outside wind can be reliably prevented from flowing into the room.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an air supply port body showing a first embodiment of the present invention.

FIG. 2 is a front view of the air supply opening body with the air supply duct removed;

FIG. 3 is a front view of an air supply opening body with the air supply duct and a shutter plate removed;

FIG. 4 is a longitudinal sectional side view showing an entire configuration of a ventilation fan for a duct.

5A and 5B are a side view and a front view of a shutter plate according to a second embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 5, showing a third embodiment of the present invention.

FIG. 7 is a front view of a shutter plate according to a fourth embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

In the figure, 11 is a ventilation fan for duct, 13 is a fan device, 14
Is a body, 18 is an exhaust port, 19 is an air supply body, 21 is an air supply body, 21c and 21d are contact portions, 22 is an air supply duct, 32
Is a cushion member, 29 and 45 are ribs in the opening 41, 3
Reference numeral 3 denotes a shutter plate (shutter member), reference numeral 42 denotes a concave portion, reference numeral 43 denotes a note (usually a character indicating that the shutter is at an outer position)
Reference numeral 7 denotes a shutter member.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasuhiro Ishikawa 991 Anada-cho, Seto-shi, Aichi Nagoya Office

Claims (7)

[Claims] A main body having an exhaust port and an air supply port and communicating with a room; a fan device disposed in the main body and configured to discharge air in the room to the outside through the exhaust port; An air supply port body provided on an outer surface of the main body and communicating the air supply duct with the air supply port communicating with the outside; and an air supply duct body provided at an end of the air supply duct side of the air supply duct body, A shutter member configured to be displaced from an outside position to an inside position by an outdoor wind flowing into the air duct, wherein the air supply duct side end of the air supply port body has a contact portion. The shutter member is configured to be smaller in diameter than the air supply duct so that an opening having the air supply duct is formed. A passage communicating with the opening is formed, and the abutment is provided when the passage is in an inward position. Contact with the duct ventilators, characterized in that it is configured so as to close the opening portion. 2. The duct ventilation fan according to claim 1, wherein the shutter member is configured to be displaced between an inner position and an outer position by rotation. 3. The shutter member according to claim 1, wherein the shutter member is displaced between an inner position and an outer position by moving in parallel in a direction in which the air supply opening extends. Duct ventilation fan. 4. The ventilation fan for a duct according to claim 2, wherein a rib is formed on an outdoor surface of the shutter member. 5. The ventilation fan for a duct according to claim 2, wherein a concave portion that protrudes toward the main body is provided on an outdoor surface of the shutter member. 6. The ventilation fan for a duct according to claim 2, wherein a cushion member is provided at the contact portion. 7. The ventilation fan for a duct according to claim 2, wherein a character for instructing that the shutter member is normally located outside is written on an outdoor surface of the shutter member.