JPH0712375A - Air supplying duct fan - Google Patents

Abstract

PURPOSE:To provide an air supplying duct fan which can be installed by a simple work and in which insallation efficiency improved, an atmospheric pressure difference between an indoor and an outdoor is reduced, and a malfunction of flow of the air can be eliminated. CONSTITUTION:The air supplying duct fan comprises a body having a suction port and a diffuser 5, an operation controller 8 for controlling a blower provided in the body 6 and a damper 11 for switching the port 4, and a differential pressure sensor 9 for sensing the atmospheric pressure difference between an indoor and an outdoor to output a signal to the controller 8, wherein the sensor 9 is embedded in a ceiling surface 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply duct fan for supplying fresh air mainly to the ceiling of a living room and connecting it to a duct communicating with the outside.

[0002]

2. Description of the Related Art In recent years, as the airtightness of houses has increased, ventilation fans and the like have been installed to discharge polluted air inside the room to the outside. Since it becomes difficult to open and close the door, the demand for an air supply duct fan that can eliminate the negative pressure inside the room is increasing.

Conventionally, this type of air supply duct fan is generally constructed as shown in FIG. Hereinafter, a conventional air supply duct fan will be described with reference to FIG. As shown in the figure, an exhaust port 1 having an exhaust fan 102 on a wall portion 101
03, the air supply port 104 is provided in the wall portion behind the ceiling, the air supply fan 107 is provided in communication with the air supply port 104 via the air supply damper 105 and the duct 106, and the air of the air supply fan 107 is provided. The flow path was connected to the air supply box 109 provided on the ceiling surface 108.

Inspection openings 110 and 111 for maintenance are provided on the ceiling surface 108, an outdoor detection section 112 for detecting the outdoor pressure is provided on the wall portion 101, and the indoor pressure is detected on the ceiling surface 108. Indoor detection unit 113
And a differential pressure sensor for measuring the pressure difference between indoor and outdoor
Is sent to the control device 116 via the signal cable 115, and the output of the air supply fan 107, that is, the air supply air volume is controlled via the motor drive cable 117.

In the above-mentioned structure, the pressure difference between the indoor side and the indoor side is detected by the outdoor side detecting section 112 and the indoor side detecting section 113, which is caused by operating the exhaust fan 102.
The output is sent from 14 to the control device 116 via the signal cable 115.

Then, the control unit 116 presets an indoor / outdoor atmospheric pressure difference capable of effective ventilation, and when the atmospheric pressure difference exceeds this set value, the control unit 116 outputs.
The air supply fan 107 whose supply air volume is variable is controlled to maintain the set air pressure difference.

[0007]

In the structure of the conventional air supply duct fan as described above, the air supply fan 107 and the air supply damper 105 are held and fixed inside the ceiling, and then the air supply damper 1 is installed.
05 and the air supply fan 107, and the air supply fan 107 and the air supply box 109 had to be connected by the duct 106.

Further, in the ceiling, the signal cable 115 and the motor drive cable 117 had to be connected to the air supply fan 107 and the differential pressure sensor 114 from the controller 116 provided inside the ceiling.

Further, the air supply fan 107 and the air supply damper 1
Since 05 is separately installed inside the ceiling, a plurality of inspection ports 110 and 111 are required on the ceiling surface for maintenance.

Further, there are problems in that a complicated system configuration including a large number of products and members and labor is required, resulting in poor workability.

Further, there is a problem in that the air flow becomes defective due to the air pressure difference set in the differential pressure sensor 114, such as dirty air or bad odors flowing into other rooms.

The present invention solves the above-mentioned problems, and can be installed by a simple work to improve the workability, and at the same time, the air pressure difference between the inside and outside of the room can be reduced to solve the problem of air flow. A first object is to provide a duct fan.

A second object is to keep the living room always in a positive pressure state and prevent air containing oily smoke from the kitchen or the like from flowing into the living room.

A third object is to keep the kitchen room in a negative pressure state at all times to prevent air containing oily smoke from the kitchen room or the like from flowing into the living room, and to prevent the exhaust fan provided in the kitchen room from being supplied. It is to prevent a decline in ability.

Further, one of the chamber A and the chamber B is maintained in a positive pressure or negative pressure state so that the chamber A and the chamber B are in a good environment corresponding to the purpose of use.

[0016]

In order to achieve the first object, the duct ventilation fan according to the present invention has a box-like shape in which the first means has a suction port on the side surface and an air outlet on the lower surface. Main body, a blower provided in the main body, a damper for opening and closing the suction port inside, an air supply adapter to which a duct communicating with the outside is connected, and an operation control circuit for controlling the blower and the damper. A differential pressure sensor that detects a pressure difference between the inside and outside of the room and sends a signal to the operation control circuit is provided, and the main body is embedded in a ceiling surface of the room provided with an exhaust fan.

In order to achieve the second object,
The second means includes an adjacent room such as a living room, which is provided next to the kitchen room provided with an exhaust fan in a ventilated state, and a main body having a differential pressure sensor provided on the ceiling surface of the adjacent room. The differential pressure sensor is set so that the positive pressure is maintained.

Further, in order to achieve the third object,
A third means is provided with an adjacent room such as a living room, which is provided next to the kitchen room provided with an exhaust fan in a ventilated state, and a main body having a differential pressure sensor provided on a ceiling surface of the kitchen room. The differential pressure sensor is set so that the chamber is maintained in a negative pressure state.

In order to achieve the above-mentioned fourth object,
A fourth means is provided with a chamber B provided next to the chamber A provided with an exhaust fan in a ventilable state, and a main body having a differential pressure sensor provided on the ceiling surface. The differential pressure sensor is configured to be switchable so as to be maintained in a negative pressure state.

[0020]

According to the present invention, with the construction of the first means described above, since the main body can be installed by burying it in the ceiling surface and then connecting the duct, it is not necessary to provide an inspection port on the ceiling surface and the exhaust fan can be operated. Detecting the indoor and outdoor air pressure difference caused by, the damper that opens and closes the suction port provided with the operation control circuit on the side surface of the main body according to the output sent from the differential pressure sensor and the blower with a variable supply air volume are controlled, The set atmospheric pressure difference is maintained.

In addition, since the living room is always kept at a positive pressure by the structure of the above-mentioned second means, air in the living room is discharged to the kitchen room side where negative pressure is generated by the operation of the exhaust fan. The air flows through the gaps and the like, so that the air on the kitchen room side is prevented from flowing into the living room side.

Further, according to the structure of the third means described above, when the negative pressure value in the kitchen room reaches a predetermined value, the operation of the damper and the blower is controlled by the function of the differential pressure sensor, and the negative pressure in the kitchen room is controlled to a predetermined value. In this state, air in the living room is sucked into the kitchen room through the gap, and air containing oil smoke and the like in the kitchen room is prevented from flowing into the living room.

With the construction of the above-mentioned fourth means, when the room A equipped with an exhaust fan is used as the living room and the room B is used as the bedroom, the living room is kept in a negative pressure state by setting the differential pressure sensor. However, air in the living room is prevented from flowing into the bedroom.

When the room B is used as a bathroom or a toilet, the differential pressure sensor is switched to a positive pressure setting to maintain a positive pressure state in the living room, and air from the bathroom or toilet flows into the living room. Will be prevented.

[0025]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG. As shown in the figure, the wall 1 of the building
An exhaust fan 3 is provided in the exhaust port 2 formed in the above, a suction port 4 is provided on a side surface, and a blower 7 having a variable supply air amount is provided in a box-shaped main body 6 having an outlet 5 formed on a lower surface. An operation control circuit 8 for controlling the operation state of the blower 7 and a differential pressure sensor 9 for detecting a pressure difference inside and outside the room are provided and installed on the ceiling surface 10.

An air supply adapter 12 having a plate-shaped damper 11 which is opened and closed by the operation control circuit 8 is provided at the suction port 4 provided on the side surface of the main body 6, and the air supply adapter 12 communicates with the outside. A duct 14 having an air supply port 13 is connected, and an outdoor side detection unit 15 and an indoor side detection unit 16 are connected to the differential pressure sensor 9.

In the above structure, when the air supply duct fan is installed, after the main body 6 is embedded and fixed in the ceiling surface 10, the duct 14 is cut to a predetermined required length and then the air supply adapter 12 and the air supply adapter 12 are connected. The construction is completed by connecting to the air vent 13 and attaching the outdoor side detection unit 15 of the differential pressure sensor 9 so as to be exposed to the outside.

Then, the indoor-outdoor detection unit 15 and the indoor-side detection unit 16 detect a pressure difference between the inside and the outside caused by operating the exhaust fan 3, and an operation control circuit according to the output sent from the differential pressure sensor 9. It is possible to control the plate-shaped damper 11 for opening and closing the suction port 4 formed on the side surface of the main body 6 and the blower 7 having a variable supply air volume to maintain the set pressure difference.

As described above, according to the air supply duct fan of the first embodiment of the present invention, the main body 6 is embedded in the ceiling surface 10, and the duct 14 and the outdoor side detecting portion 15 are simply connected to the main body 6. Since it can be installed by work, the workability is improved, and the air pressure difference between the inside and outside of the room is reduced, and the problem of air flow is eliminated.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, a living room 16 and a kitchen room 17 are formed adjacent to each other by a door 19 having a vent 18 in the building. Then, an exhaust port 2 is formed in the wall portion 1 on the kitchen room 17 side, an exhaust fan 3 is provided in the exhaust port 2, and a main body 6 having the same configuration as that of the first embodiment is embedded in the ceiling surface 10 of the living room 16, The duct 14 and the outdoor detection unit 15 are connected to the unit 6 and installed.

The body 6 installed on the living room 16 side is provided with a differential pressure sensor 9a so that the living room 16 always has a positive pressure.

In the above structure, the indoor / outdoor air pressure difference caused by operating the exhaust fan 7 is detected by the outdoor side detecting section 15.
Is detected by the indoor side detection unit 16, and the damper 11 and the supply air amount for the operation control circuit 8 to open and close the suction port 4 formed on the side surface of the main body 6 in accordance with the output sent from the differential pressure sensor 9. The variable blower 7 is controlled and operated.

At this time, since the living room 16 is set so as to be always kept at a positive pressure, the air on the living room 16 side is moved to the door 1 by the operation of the exhaust fan 3 to the kitchen room 17 side which becomes a negative pressure.
9 through the gap 20 around the vent hole 18 and the door 19 of the door 19 and the air on the kitchen room 17 side flows into the living room 16
It will be prevented from flowing into the side.

As described above, according to the air supply duct fan of the second embodiment of the present invention, since the living room 16 is always maintained in the positive pressure state, the kitchen room 17 adjacent to the living room 16 in which smoke or the like is generated is generated. Even when the above is provided, the smoke-containing air on the kitchen room 17 side is prevented from flowing into the living room 16 side.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, a living room 16a and a kitchen room 17a are formed adjacent to each other by a door 19 having a vent 18 in the building. An exhaust port 2 is formed in the wall portion 1 on the kitchen chamber 17a side, an exhaust fan 3 is provided in the exhaust port 2, and a main body 6 having the same configuration as that of the first embodiment is attached to the ceiling surface 1 of the kitchen chamber 17a.
0, and the main body 6 has a duct 14 and an outdoor detection unit 1
Connect and install 5.

The main body 6 installed on the kitchen room 17a side
Is provided with a differential pressure sensor 9b set so that the kitchen room 17a always has a negative pressure.

In the above structure, when the exhaust fan 3 is operated during cooking in the kitchen room 17a, the inside pressure of the kitchen room 17a becomes negative, but when the negative pressure exceeds a predetermined value, the capacity of the exhaust fan 3 is lowered and cooking is performed. The oil smoke generated at times is not sufficiently discharged, but at this time, the air supply duct fan is operated by the operation of the differential pressure sensor 9b, so that the kitchen room 17a is operated.
The outside air is supplied to the inside to reduce the negative pressure, and the exhaust fan 3 sufficiently discharges the oil smoke.

When the negative pressure value in the kitchen room 17a reaches a predetermined value, the damper 1 is actuated by the action of the differential pressure sensor 9b.
1 and the operation of the blower 7 are controlled through the operation control circuit 8 so that the negative pressure in the kitchen 17a is maintained at a predetermined value, and the air in the living room 16a is ventilated through the vent 18 and the door 19 of the door 19.
Is sucked into the kitchen room 17a through the gap around the
The air containing oily smoke and the like in a is prevented from flowing into the living room 16a.

As described above, according to the air supply duct fan of the third embodiment of the present invention, the main body 6 is provided on the ceiling surface 10 of the kitchen room 17a provided with the exhaust fan 3 for discharging the oil smoke, and the indoor / outdoor Pressure sensor 9b provided in the main body 6 for detecting the pressure difference between the
By the function of the blower 7, the damper 11 for opening and closing the blower 7 and the suction port 4 is controlled via the operation control circuit 8, and the kitchen room 1
The exhaust fan 3 provided in 7a is prevented from deteriorating its performance, and the kitchen room 17a is kept in a negative pressure state, so that the adjacent living room 1
The oil smoke generated in the kitchen 17a is prevented from flowing out to 6a and the like.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, an A room 21 and a B room 22 are formed adjacent to each other by a door 19 having a vent 18 in the building. An exhaust port 2 is formed in the wall portion 1 on the A chamber 21 side, an exhaust fan 3 is provided in the exhaust port 2, and a main body 6 having the same configuration as that of the first embodiment is embedded in the ceiling surface 10 of the A chamber 21. The duct 14 and the outdoor detection unit 15 are connected to the main body 6 and installed.

Further, the main body 6 installed on the A chamber 21 side is provided with a differential pressure sensor 9c incorporating a changeover switch capable of setting the A chamber 21 to a positive pressure or a negative pressure.

In the above structure, for example, when the room A 21 is used as a living room and the room B 22 is used as a bedroom, if the differential pressure sensor 9c is set to a negative pressure by a changeover switch, the cigarettes in the room A 21 are used. When the smoke etc. is generated, it is exhausted by the exhaust fan 3, and when the negative pressure in the A chamber 21 becomes a predetermined pressure or more, the capacity of the exhaust fan 3 is lowered and exhaust is not sufficiently performed. By the operation of the sensor 9c, the air supply duct fan is operated to supply the outside air into the A chamber 21 to reduce the negative pressure level, the exhaust fan 3 exhausts the air sufficiently, and fresh outside air is generated. Air will be supplied into the A room 21.

On the other hand, in the B chamber 22, the A chamber 21 becomes a negative pressure, so that the vent hole 18 of the door 19 and the door 1
The air inside the B chamber 22 passes through the gap 20 around the A chamber 21
The air is sucked in to the B chamber 22, and the contaminated air from the A chamber 21 is prevented from entering the B chamber 22.

Next, when the room A 21 is used as a living room and the room B 22 is used as a bathroom or a toilet, when the differential pressure sensor 9c is set to a positive pressure by a changeover switch and used,
When cigarette smoke or the like is generated in the A chamber 21, when the exhaust fan 3 exhausts the A chamber 21 to a negative pressure, the differential pressure sensor 9c operates the air supply duct fan.
The outside air is supplied to the A chamber 21 to bring the A chamber 21 into a positive pressure state, the exhaust fan 3 exhausts the A chamber 21 sufficiently, and the A chamber 21 is filled with fresh outside air.

On the other hand, in the B chamber 22, the positive pressure in the A chamber 21 causes the fresh air in the A chamber 21 to pass through the vent hole 18 of the door 19 and the gap 20 around the door 19 and the B chamber 22. Will be flown into the room B from room B 22 to room A 2
Since the air does not flow toward 1, the odor of the toilet etc. is prevented from entering the living room.

As described above, according to the air supply duct fan of the fourth embodiment of the present invention, the exhaust fan corresponds to the purpose of use of the A chamber 21 and the B chamber 22 which are provided adjacent to each other through the door 19 in the building. Since the differential pressure sensor 9c can be switched so as to set the positive pressure or the negative pressure in the A chamber 21 in which the 3 and the main body 6 are installed, the air in the A chamber 21 is sucked into the B chamber 22 or , B chamber can be prevented from being inhaled, and a good environment of the A chamber 21 and the B chamber 22 can be created with good usability.

[0050]

As is apparent from the above embodiments, according to the present invention, a damper for opening and closing the suction port, a blower with a variable air supply amount, an operation control circuit for the damper and the blower, and an indoor and outdoor unit are provided. Since the main body is equipped with a differential pressure sensor that detects the pressure difference and outputs it to the operation control circuit, it can be installed by burying the main body in the ceiling surface, so there is no need to install an inspection port on the ceiling surface It is possible to provide an air supply duct fan that is easy and has good workability, and that can reduce the air pressure difference between the inside and outside of the room to solve the problem of air flow.

Further, since the living room is always kept in a positive pressure state by setting the differential pressure sensor, even when a kitchen room is provided next to the living room, air including oil smoke and the like in the kitchen room flows into the living room. Will be prevented.

Further, since the main body is provided on the ceiling surface of the kitchen room provided with the exhaust fan and the kitchen room is kept in a negative pressure state by setting the differential pressure sensor, the air in the kitchen room in the adjacent living room is maintained. Will be prevented from flowing in.

Further, since there is a chamber A and a chamber B, and one of the chambers A is provided with a main body having a differential pressure sensor capable of switching between positive pressure and negative pressure setting, it is possible to use the chamber A and the chamber B for the purpose of use. Correspondingly, it is possible to prevent the inflow of air from the B chamber by making the A chamber a positive pressure and prevent the air from flowing to the B chamber side by making the A chamber a negative pressure. It is possible to solve the problem of air flow corresponding to the purpose of use.

[Brief description of drawings]

FIG. 1 is a sectional view showing an installed state of an air supply duct fan according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an installed state of the air supply duct fan of the second embodiment.

FIG. 3 is a cross-sectional view showing an installed state of the air supply duct fan of the third embodiment.

FIG. 4 is a sectional view showing an installed state of an air supply duct fan of the fourth embodiment.

FIG. 5 is a cross-sectional view showing an installed state of a conventional air supply duct fan.

[Explanation of symbols]

 3 Exhaust fan 4 Suction port 5 Outlet port 6 Main body 7 Blower 8 Operation control circuit 9 Differential pressure sensor 9a Differential pressure sensor 9b Differential pressure sensor 9c Differential pressure sensor 10 Ceiling surface 11 Damper 12 Air supply adapter 14 Duct 16 Living room 16a Living room 17 Kitchen Room 17a Kitchen room 21 A room 22 B room

Claims (4)

[Claims] 1. A box-shaped main body having a suction port on a side surface and an air outlet formed on a lower surface, a blower provided in the main body with a variable supply air volume, and a damper for opening and closing the suction port. And an air supply adapter to which a duct communicating with the outside is connected, an operation control circuit for controlling the blower and the damper, a differential pressure for detecting an air pressure difference between the inside and the outside and sending an output to the operation control circuit. An air supply duct fan having a sensor and a main body embedded in a ceiling surface of a room provided with an exhaust fan. 2. A kitchen room provided with an exhaust fan is provided with an adjoining room such as a living room, which is provided next to the kitchen room in a ventilated state, and a main body having a differential pressure sensor provided on a ceiling surface of the adjoining room. The air supply duct fan according to claim 1, wherein the differential pressure sensor is set so as to be maintained in a positive pressure state. 3. An adjacent room such as a living room, which is provided next to the kitchen room provided with an exhaust fan so as to be ventilated, and a main body having a differential pressure sensor provided on a ceiling surface of the kitchen room,
2. The air supply duct fan according to claim 1, wherein the differential pressure sensor is set so that the kitchen room is maintained in a negative pressure state. 4. A room B provided next to the room A provided with an exhaust fan in a ventilated state, and a main body having a differential pressure sensor provided on a ceiling surface of the room A, wherein the room A is provided. The air supply duct fan according to claim 1, wherein the differential pressure sensor is switchably set so as to be maintained in a positive pressure or negative pressure state.