JP2000088304A - Ventilation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation unit which can prevent intrusion of rainwater or the like from an outlet and intrusion of outdoor air into indoor space on the occasion of an adverse wind, without enlarging the size of a main body, by a simple structure and at a low cost. SOLUTION: At the time when the operation is stopped, dampers 12 and 13 fitted rotatably to an outlet 20 provided on the lower side of a housing balance weights 32 and 34 respectively and the dampers 12 and 13 are closed practically. At the time when the operation is made, the dampers 12 and 13 are pushed to open by the air blown off from a turbofan. When an adverse wind blows, the dampers 12 and 13 are closed by the wind blowing into a ventilation unit from the outlet 20, so as to prevent outdoor air from coming into indoor space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation unit for ventilating a room by discharging room air outside the room.

[0002]

2. Description of the Related Art Conventionally, as a ventilation unit, there is a ventilating unit which ventilates a room by discharging room air outside the room. As shown in FIG. 4, the ventilation unit includes a support member 5, a scroll member 46, a turbo fan 7, a motor 8, a motor cover 9, and a housing 41. And
The wall pipe 2 is inserted into the pipe through hole 1 a provided in the wall 1, the ventilation pipe 3 is inserted into the wall pipe 2, and the scroll member 46 of the ventilation unit 40 is placed outside the ventilation pipe 3 in a funnel shape. Through an induction pipe 4. As shown in FIG. 5, an outlet 50 for blowing air horizontally along the wall surface of the wall 1 is provided on the side of the scroll member 46, and a plurality of dampers 51 are attached to the outlet 50.

In the ventilation unit having the above structure, when the turbo fan 7 is driven to rotate in the direction of arrow R6 by the motor 8, the ventilation pipe 3 and the induction pipe 4 shown in FIG.
The indoor air sucked into the scroll member 46 via the air outlet is blown out of the room from the air outlet 50. When the operation of the ventilation unit 40 is stopped, the air outlet 50 is closed by the damper 51 to prevent outside air from entering the room from the outside through the air outlet 50, and the occupant is invaded by outside air having a different room temperature. To prevent discomfort.

[0004]

By the way, in the above-mentioned ventilation unit, the outlet 50 is provided on the side of the housing 41 so that the blowing direction is horizontal.
At the time of opening 1, there is a drawback that water accumulates in the housing 41 due to intrusion of rainwater or the like, and the equipment breaks down due to breakage of the turbofan 7 or the like. Further, when the guide 52 for preventing rainwater or the like from entering from the outlet 50 is provided, there is a problem that the size of the main body becomes large, the installation place is restricted, and the cost is high.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent rainwater and the like from entering from an air outlet and outside air from entering a room at the time of a headwind without increasing the size of the main body, with a simple structure and at low cost. To provide a ventilation unit.

[0006]

In order to achieve the above object, a ventilation unit according to claim 1 is provided in a housing and provided on a lower side of the housing, a fan for discharging indoor air to the outside, An outlet for blowing air from the fan downward, a damper rotatably attached to the outlet, and a damper provided on the damper, such that the damper closes the outlet when operation is stopped. The damper is equipped with a weight that balances with the damper.During operation, the damper is pushed outward by air blown out from the fan to open the blowout opening, and in the case of a headwind in which outside air is blown into the housing from the outside, the headwind is generated by the headwind. The damper is pushed inward to close the outlet.

According to the ventilation unit of the first aspect, when the operation is stopped, the damper and the weight are balanced, and the damper substantially closes the outlet. Then, during operation, when the indoor air is blown downward from the air outlet provided on the lower side of the housing by the fan, the damper rotatably attached to the air outlet is blown out from a state in which the damper is balanced with the weight. Pushed open. Next, when the operation is stopped again, the wind blown out from the fan disappears, the damper rotates by the weight, and the damper and the weight balance with the damper in a state where the outlet is substantially closed. in this way,
An outlet is provided on the lower side of the housing where rainwater etc. is difficult to enter, and when the operation is stopped, the outlet is closed by a damper,
Prevent rainwater from entering. Further, even if outside air is blown into the housing from the blow-out port due to the reverse wind blown into the housing from the outside, the blow-out port is closed by the damper pushed inward by the reverse wind, and the outside air does not enter the room. Therefore, without increasing the size of the main body, it is possible to prevent rainwater and the like from entering from the outlet at a simple structure and at low cost, and to prevent outside air from entering from outside.

The ventilation unit according to a second aspect is characterized in that, in the ventilation unit according to the first aspect, the number of the dampers is plural, and the respective dampers do not contact each other at the time of opening / closing operation.

According to the ventilation unit of the second aspect, when each of the dampers is opened or closed, the dampers do not come into contact with each other, so that generation of abnormal noise can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a ventilation unit according to the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a cross-sectional view of a ventilating unit according to an embodiment of the present invention as viewed from the side, and FIG. 2 is a sectional view taken along line II-II of FIG.
It is sectional drawing seen from the line. The ventilation unit is
Except for a scroll member, a damper, and a housing, it has the same configuration as the ventilation unit shown in FIGS.
The same components are denoted by the same reference numerals.

In FIG. 1, reference numeral 2 denotes a wall pipe inserted through a pipe through hole 1a provided in a wall 1, reference numeral 3 denotes a ventilation pipe inserted into the wall pipe 2, and reference numeral 4 denotes an outside of the ventilation pipe 3 outside. The connected guide pipes 5 are four support members (only two are shown in FIG. 1), one ends of which are fixed near the pipe through hole 1a on the outdoor side of the wall 1, respectively. A scroll member attached to the end and connected to the tip of the guide pipe 4, 7 is a turbo fan disposed in the scroll member 6, 8 is attached to the scroll member 6 on the opposite side of the wall 1, This is a motor that drives the fan 7 to rotate. The motor 8 is covered with a motor cover 9, and the support member 5, the scroll member 6, the turbofan 7, the motor 8 and the motor cover 9 are covered with a housing 11. The ventilation unit 10 includes the support member 5, the scroll member 6, the turbofan 7, the motor 8, the motor cover 9, the housing 11, and a damper mechanism described later.

The ventilation unit 10 having the above-described structure blows out the room air drawn into the scroll member 6 from the room through the ventilation pipe 3 and the guide pipe 4 by rotating the turbo fan 7 by the motor 8. That is, as shown in FIG. 2, the turbo fan 7 is rotated in the direction of arrow R1, and the air blown out of the turbo fan 7 is blown downward from the outlet 20 provided on the lower side of the housing 11. Two dampers 12 and 13 are disposed in the outlet 20. More specifically, as shown in FIG. 3A, dampers 12 and 13 open from both sides from the center to both sides of an air passage near the outlet 20. 12 and 13 are attached. The dampers 12 and 13 are bent in the shape of a cross section, respectively. The shafts 31 and 33 are fixed to the roots of the bent portions 12a and 13a, and the weights 32 and 34 are fixed to the bent portions 12a and 13a, respectively. I have. The shafts 31 and 33 are rotatably supported by bearings (not shown) provided on the scroll member 6.

FIG. 3A shows the state of the dampers 12, 13 when the operation of the ventilation unit 10 is stopped. The dampers 12, 13 and the weights 32, 34 are balanced with each other, and
0 is almost closed. That is, the counterclockwise rotation moment due to gravity acting on the center of gravity of the weight 32 and the damper 1
The clockwise rotational moment due to the gravity acting on the center of gravity of the weight 2 is balanced with the clockwise rotational moment due to the gravity acting on the center of gravity of the weight 33, and the counterclockwise rotational moment due to the gravity acting on the center of gravity of the damper 13 is balanced.
The outlet 20 is substantially closed by the dampers 12 and 13.

FIG. 3B shows the state of the dampers 12 and 13 during the operation of the ventilation unit 10, and the air blown out of the turbo fan 7 (shown in FIGS.
By hitting the inner surface of 2,13, the damper 12,
13 is rotated in the directions of arrows R2 and R3, respectively, to open the air outlet 20. The dampers 12 and 13 have a weight 3
Since it opens with a small force from the state of being balanced with 2,34, respectively, the resistance to the blown air is kept small.

FIG. 3C shows the state of the dampers 12 and 13 when the ventilation unit 10 is in the reverse wind, and the wind blown from the outside into the outlet 20 hits the outer surfaces of the dampers 12 and 13 so that the dampers 12 and 13 can be used. Arrows R4, R for 12, 13
5, the dampers 12, 13 are stopped by stoppers (not shown) with the air outlet 20 closed. At this time, the dampers 12, 13 do not contact each other.

As described above, when the operation is stopped, the outlet 2
The dampers 12, 13 which are rotatably mounted at 0 and the weights 32, 34 respectively balance, and the dampers 12, 13 are substantially closed. During operation, the dampers 12, 13 are pushed by wind blown from the turbo fan 7. be opened. Further, when outside air tries to enter from outside the room at the time of a headwind or a negative pressure in the room, the dampers 12, 13 are closed by the wind blown into the ventilation unit 10 from the outlet 20 so that the outside air does not enter the room. .

Therefore, the ventilation unit 10 can prevent rainwater or the like from entering from the outlet at a simple structure and at low cost without increasing the size of the main body, and also allows outside air to enter the room from outside in the event of a headwind. Intrusion can be prevented and indoor comfort can be improved.

Further, when the dampers 12 and 13 are closed, the dampers 12 and 13 do not come into contact with each other, so that generation of abnormal noise can be prevented.

In the above embodiment, the dampers 12,
Although the ventilation unit 10 in which the ventilator 13 is attached to the air outlet 20 has been described, the configuration of the ventilation unit is not limited to this, and it is a matter of course that the present invention may be applied to various types of ventilation units.

In the above embodiment, two dampers 12, 13 are attached to the outlet 20, but one or three or more dampers may be used.

Furthermore, in the above embodiment, the turbo fan 7 is used, but the fan is not limited to this, and another type of fan such as an axial fan may be used.

[0023]

As is apparent from the above description, in the ventilation unit according to the first aspect of the present invention, a damper is rotatably attached to an air outlet provided on the lower side of the housing. When the weight provided in the chamber is balanced, the air outlet is substantially closed by the damper, and during operation, when the air in the room is blown downward from the air outlet by the fan disposed in the housing, the damper is blown by the air blown from the fan. In the case of a reverse wind that blows outward and opens the outlet, and then blows into the housing from the outside,
The outlet is closed by the damper which is pushed inward by the reverse wind and closed.

Therefore, according to the ventilating unit of the invention of Claim 1, the provision of the air outlet below the housing and the automatic closing of the air outlet by the damper when the operation is stopped allow rainwater and the like to be removed. In addition to preventing the air from entering, even if outside air blows into the ventilation unit from the air outlet due to headwind, etc., the air outlet is closed by the damper, so that the external air does not enter the room,
Without increasing the size of the main body, it is possible to prevent rainwater and the like from entering from the outlet with a simple structure and at a low cost, and also to prevent invasion of outside air from outside to improve indoor comfort. .

The ventilation unit according to the second aspect of the present invention
In the ventilation unit according to the first aspect, since the plurality of dampers are provided and the respective dampers do not contact each other at the time of opening / closing operation, generation of abnormal noise due to contact of the respective dampers can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a ventilation unit according to an embodiment of the present invention as viewed from a side.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIGS. 3 (A) and 3 (B) are views showing the operation of a damper mechanism of the ventilation unit.

FIG. 4 is a cross-sectional view of a conventional ventilation unit as viewed from a side.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wall, 2 ... Wall pipe, 3 ... Ventilation pipe, 4 ... Guidance pipe, 5 ... Support member, 6 ... Scroll member, 7 ... Turbo fan, 8 ... Motor, 9 ... Motor cover, 10 ... Ventilation unit, 11 ... Housing, 12, 13 ... damper, 31, 33 ... shaft, 32, 34 ... weight, 20 ... outlet.

Claims (2)

[Claims] 1. A fan (7) arranged in a housing (11) for discharging indoor air to the outside of the room, and a fan provided below the housing (11),
An outlet (20) for blowing air from (7) downward, and a damper rotatably attached to the outlet (20).
(12, 13), provided on the damper (12, 13), such that the damper (12, 13) closes the air outlet (20) when the operation is stopped. ) And the weights (32, 34) which are balanced with each other. In operation, the air blown out from the fan (7) pushes the dampers (12, 13) outward and opens the air outlet.
(20) is opened, and when the outside air blows into the housing (11) from the outside, the damper (12, 13) is pushed inward by the backwind to close the outlet (20). Ventilation unit. 2. The ventilation unit according to claim 1, wherein the plurality of dampers (12, 13) are plural, and the respective dampers (12, 13) do not come into contact with each other during opening and closing operations. .