JP2004190866A - Ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilator capable of performing suitable local ventilation in response to each room while keeping the total amount of ventilation for a dwelling house constant irrespective of fluctuation of the wind pressure of the outside air when performing 24-hour ventilation. <P>SOLUTION: The ventilator is equipped with a first suction port 14, a second suction port 19, and a third suction port 20 for sucking air from a plurality of rooms. The ventilator is provided with a ventilation fan 23 which performs the ventilation by sucking the air in the dwelling house from the plurality of suction ports 14, 19, 20 and discharging the air to the outside of the dwelling house, a micro computer 32 which controls the amount of ventilation in response to each room while keeping the total amount of ventilation constant which is sucked from the suction ports 14, 19, 20 and discharged, and dampers D1 to D3 and damper motors M3, M4, M5 at the suction ports 14, 19, 20. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a ventilator for constantly maintaining a constant ventilation air volume per hour, such as a detached house or a condominium house.
[0002]
[Prior art]
Recent houses are becoming more airtight and more heat-insulating, while new houses, new furniture and curtains are known to emit formaldehyde and volatile organic compounds from building materials such as carpets, flooring and cloths. .
[0003]
For this reason, a range hood fan in a kitchen, a duct fan forcibly exhausting air from a bathroom, a washroom, a toilet, and the like to the outside are frequently started to perform appropriate ventilation, and a concentration of carbon dioxide, formaldehyde, VOC, etc. It is preferable to keep the humidity low and prevent allergy from occurring.
[0004]
In particular, since the oil fan heaters etc. were used in a closed room without ventilation for a long time, they became oxygen deficient, the concentration of carbon dioxide increased, causing headaches, etc., and the humidity increased, causing mold and ticks However, frequent ventilation is desired in highly airtight houses such as condominiums.
[0005]
Therefore, it is required to perform 24-hour ventilation, which constantly performs ventilation in a house. The 24-hour ventilation is to constantly perform ventilation at a low air flow. In a condominium house, for example, ventilation of about 0.5 times / hour of the volume of each room to satisfy the required ventilation air volume in each room. Is needed. The air volume of this 24-hour ventilation is set in advance at the time of construction of a house so that a required air volume is obtained.
[0006]
Therefore, when simultaneously ventilating a plurality of rooms, when the local ventilation switch in each room is turned on, the opening area of the suction port where the ventilation switch is turned on is increased, while the opening area of the suction port of another room is reduced. In some cases, a local ventilation air volume is secured by increasing the number of fan rotations of the ventilation device.
[0007]
As a prior art relating to multi-chamber ventilation, a “multi-chamber ventilator” disclosed in Patent Document 1 is known. This "multi-chamber ventilation system""ventilates bathrooms, toilets and toilets" and "prevents bathroom moisture from entering toilets and toilets, and does not leak toilet odors into bathrooms and toilets." A bathroom-side intake, a toilet-side intake, and a lavatory intake are formed on the intake side of the blower, and each of the intakes can be freely opened and closed by a damper, and one damper is opened. One room can be ventilated and each room should not communicate with each other. "
[0008]
[Patent Document 1]
JP-A-10-73297 (0004 to 0080, FIGS. 1 and 2)
[0009]
[Problems to be solved by the invention]
However, in the conventional local ventilation system, even if the ventilation of a room to be subjected to local ventilation is started, the opening area of the suction port of another room does not become “0”, and the ventilation of each room is performed simultaneously. Therefore, there is a possibility that the room other than the one trying to perform the local ventilation loses the ventilation air volume, and the ventilation air volume of the room targeted for the local ventilation cannot be sufficiently obtained. Also, in order to secure the local ventilation air volume, the number of rotations of the fan must be increased, so that the noise may increase.
[0010]
Furthermore, conventionally, when the toilets and bathrooms are ventilated, the total ventilation air volume of the entire house changes, so that in a highly airtight apartment or a detached house, if the total exhaust amount is too large, the energy saving effect such as cooling in summer is impaired. However, in winter, there is a problem in that the amount of ventilation air from the natural air intake increases and the heating effect decreases.
[0011]
In addition, when the wind pressure is strong, the air flows back into the house from the exhaust port facing the outside of the house via the pipe, so that there is a problem that the ventilation air volume is reduced and dew condensation occurs around the pipe due to the backflow of the air. .
[0012]
The present application has been made in view of such a problem, and when performing ventilation for 24 hours, irrespective of the fluctuation of the wind pressure of the outside air, the total ventilation air volume of the house is kept constant, and the room is adapted to each room. An object of the present invention is to provide a ventilation device that can perform appropriate local ventilation.
[0013]
[Means for Solving the Problems]
In order to solve the above-described problems, a first ventilator of the present application includes a plurality of air inlets for sucking air from a plurality of rooms, and sucking air in a house from the plurality of air inlets and exhausting the air to the outside of the house. Air exhaust means for providing ventilation, and control means for controlling the amount of ventilation air according to each room while satisfying the total ventilation air volume required by the target area to be sucked and discharged from the plurality of suction ports. It is characterized by.
[0014]
The second ventilator of the present application includes a plurality of suction ports for sucking air from a plurality of rooms, respectively, and includes an air discharge unit that sucks air in the house from the plurality of suction ports and discharges the air outside the house. A ventilator, wherein a control means for controlling the air discharging means is provided with a constant ventilation mode for constantly ventilating the target area, and while the constant ventilation mode is being executed, the constant ventilation air volume in the target area is kept constant. In addition, an air volume control function for controlling the ventilation air volume in each room to be a predetermined air volume is provided.
[0015]
A third ventilation device according to the present invention is characterized in that, in any one of the first and second ventilation devices, an air volume adjusting means is provided at the plurality of suction ports.
[0016]
The fourth ventilator of the present application is the ventilator according to any one of claims 1 to 3, wherein the suction port that is not selected based on a ventilation air volume from a suction port selected from the plurality of suction ports. Is characterized in that the airflow adjusting means is adjusted so that the ventilation airflow of the target area is reduced to the required ventilation airflow.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a ventilation device according to an embodiment of the present application will be described with reference to the drawings.
[0018]
FIGS. 2 to 4 schematically show the main configuration of the ventilation device main body 1 installed in a bathroom, a dressing room, or the like. The main body case 2 that covers the outside of the ventilation device main body 1 is attached to the ceiling of the bathroom 3. As shown also in FIGS. 2 and 3, the main body case 2 is provided with an upper and lower two-stage unit, and the lower unit 6 on the bathroom side has a cylindrical centrifugal circulating fan 7 for sucking air from the bathroom 3. , A circulation air passage 9 for circulating the sucked air into the bathroom 3, and a first suction port 14 for guiding the air in the bathroom 3 to the upper unit 13. The first suction port 14 is provided with a damper D1.
[0019]
The circulation fan 7 of the lower unit 6 is housed inside the fan case 10, and the fan case 10 is formed with a suction opening 8 for sucking air in the bathroom 3. The circulation air passage 9 is provided with a PTC heater (Positive Temperature Coefficient heater) 11. A temperature sensor (not shown) composed of a thermistor is installed near the exhaust opening for circulation. Note that a carbon heater 12 may be provided in addition to the PTC heater 11. When the bath heater mode is provided, the carbon heater 12 can warm the bather by radiant heat.
[0020]
A fan motor M2 for rotating the circulation fan 7 is attached to an upper portion of the fan case 10, and the circulation fan 7 is fixed to an output shaft of the fan motor M2.
[0021]
The upper unit 13 constitutes a ventilation mechanism for ventilating air from other rooms such as a bathroom and a living room in addition to the bathroom 3. A suction opening 15 is formed below the case 13A of the upper unit 13. The suction opening 15 communicates with the first suction port 14 communicating with the bathroom 3 via the gap S with the lower unit 6, and after sucking the air in the bathroom 3 into the upper unit 13, the upper unit 13 and the main body The air can be exhausted (ventilated) from the exhaust port 16 of the case 2. 17A is a duct joint provided in the main body case 2 so as to face the exhaust port 16, and an exhaust duct 18A is connected to the duct joint 17A.
[0022]
A ventilation fan 23 is provided inside the fan case 13A of the upper unit 13, and the ventilation fan 23 is rotated by a fan motor M1. When the ventilation fan 23 rotates, air is sucked in from the first suction port 14 and the suction opening 15 and moved along the inner wall of the upper unit 13, and is exhausted from the exhaust port 16 to the duct joint 17A and the duct 18A to the outside of the building (ventilation). ).
[0023]
As shown in FIG. 3, a second suction port 19, a third suction port 20, and a fourth suction port 21 for ventilating a lavatory other than a bathroom and other rooms are opened in a side wall portion of the main body case 2. These suction ports 19 and 20 are provided with dampers D2 and D3, respectively, are provided with duct joints 17B, and the intake duct 22 is connected to the duct joint 17B. The fourth suction port 21 is closed.
[0024]
The first suction port 14, the second suction port 19, and the dampers D1 to D3 of the third suction port 20 are provided as air volume adjusting means. As shown in FIG. 5, these dampers D1 to D3 are provided with three shielding plates 23A, 23B, and 23C and rotating shafts 24A, 24B, and 24C provided at the center of these shielding plates 23A, 23B, and 23C. And gears 25A, 25B, 25C attached to the ends of the rotating shafts 24A, 24B, 24C.
[0025]
Both ends of the rotating shafts 24A, 24B, 24C are rotatably held at opposing edges of the suction ports 19-21, and the gears 25A, 25B, 25C are located outside the suction ports 19-21. Will be installed. A driving gear 26 is fixed to one of the three rotation shafts 24A. The gear 26 is driven by a damper motor M3 (hereinafter, dampers D1 and D2 are also driven by damper motors M4 and M5). ), And is driven by a damper motor M3. The dampers D1 and D2 are also driven by damper motors M4 and M5 via a similar mechanism.
[0026]
The damper motor M3 is connected to a motor drive circuit 28 as an interface. The damper motors M4 and M5 are similarly connected to the motor drive circuits 29 and 30. The motor drive circuits 28 to 30 include a circuit for switching between normal rotation and reverse rotation of the damper motors M3, M4, M5, and perform normal and reverse rotation of the damper motors M3, M4, M5 under the control of the control unit 31. Control the power supply. The control unit 31 (see FIG. 3) is provided above the upper unit 13. Note that the damper motor does not have to be a forward / reverse rotating type as long as it can rotate.
[0027]
The control board of the control unit 31 includes a microcomputer 32, a power supply circuit, and other peripheral circuits. The control unit 31 controls the fan motors M1, M2, the motor drive circuits 28, 29, 30, the PTC heater 11, and the like.
[0028]
The power supply circuit supplies the power of the domestic commercial power supply to the PTC heater 11, the fan motors M1 and M2, and the damper motors M3, M4 and M5, and converts the commercial power into a low-voltage DC and supplies it to the microcomputer 32. .
[0029]
As shown in FIG. 6, the microcomputer 32 includes a PTC heater 11, a temperature sensor, fan motors M1, M2, damper motors M3, M4, M5, a bathroom lighting switch S1, a toilet ventilation switch S2, and a toilet ventilation switch S3. It is connected.
[0030]
The bathroom lighting switch S1 is a switch in which a series circuit composed of a resistor and a rectifier is connected in parallel to a ground wire of a power switch for lighting provided on the entrance wall of the bathroom or the like. It detects that is lit. The toilet ventilation switch S2 and the toilet ventilation switch S2 are configured by ventilation switches installed in bathrooms, toilets, and toilets.
[0031]
Further, a remote controller 33 is connected to the microcomputer 32 via a control line 34. The remote controller 33 includes a drying button B1, a cool air button B2, a heating button B3, a ventilation button B4, a 24-hour ventilation button B5, a timer switching button B6, a timer adjustment up button B7, a timer adjustment down button B8, a reset switch B9, an LCD, It has LED1 and LED2.
[0032]
The microcomputer 32 activates an operation control program based on an operation command from the remote controller 33.
[0033]
The operation control program operates in response to the operation of the operation buttons B1 to B9, and has a drying mode, a cool air mode, a ventilation mode, a timer mode, and a 24-hour ventilation mode. In the 24-hour ventilation mode in the operation control program, the air volume is adjusted in consideration of the on / off state of the bathroom lighting switch S1, the bathroom ventilation switch S2, and the toilet ventilation switch S3.
[0034]
When the "dry" button B1 is pressed, the ventilation device body 1 enters a drying mode, the circulation fan motor M2 rotates at high speed, the ventilation fan motor M1 rotates at medium speed, and the PTC heater 11 generates heat. , Clothes and the like can be dried.
[0035]
When the "cool air" button B2 is pressed, the ventilation device body 1 enters the cool air mode, the circulation fan motor M2 rotates at high speed, and the ventilation fan motor M1 rotates at medium speed.
[0036]
When the "heating" button B3 is pressed, the ventilation device main body 1 enters the heating mode, the circulation fan heater M2 rotates at a high speed, and the PTC heater 11 generates heat. The ventilation fan motor M1 does not rotate.
[0037]
The “ventilation” button B4 is provided with strong ventilation B4a and weak ventilation B4b. When the strong ventilation B4a of the ventilation button B4 is pressed, the ventilation device body 1 enters the strong ventilation mode, and the ventilation fan motor M1 rotates at a high speed. When the weak ventilation B4b of the ventilation button B4 is pressed, the ventilation device body 1 enters the weak ventilation mode, and the ventilation fan motor M1 rotates at a low speed. If the ventilation button B4 is pressed with the bathroom lighting switch S1 turned on, the input ventilation mode is set, and the ventilation fan motor M1 rotates at the minimum speed.
[0038]
When these operation buttons B1 to B8 are operated, a command signal designated via the control line 34 is transmitted to the ventilator body 1, and the ventilator body 1 is designated as "heating,""coolair,""dry," or "dry." Perform the operation of “ventilation”.
[0039]
When each of the drying button B1, the cool air button B2, the heating button B3, and the ventilation button B4 is pressed, the backlight illumination is turned on to indicate that the specified operation is being performed.
[0040]
In the timer mode, each operation mode of the operation control program is selected based on the operation request sent from the remote controller 33, and the operation mode is started and stopped at the commanded time.
[0041]
The LED 1 displays an entry time (operation start time) at which the selection operation is started by pressing the timer switching button B6 when the timer adjustment up button B7 or the down button B8 is pressed. The LED 2 displays a remaining time (operation remaining time) for stopping the selection operation by pressing the timer switching button B6 when the timer adjustment up button B7 or the down button B8 is pressed.
[0042]
The 24-hour ventilation button B5 is a button for instructing to perform 24-hour ventilation. When the 24-hour ventilation button B5 is pressed for a time within 3 seconds, the ventilation fan 23 rotates and 24-hour ventilation is started. .
[0043]
The 24-hour ventilation is to constantly perform ventilation at a low air volume. In an apartment, a required ventilation air volume per unit time of each room as a target area (the number of times of ventilation, for example, 0.5 times the volume of each room) / Hour ventilation is required.), The ventilation air volume per hour is set according to the volume obtained by multiplying the total floor area by the height in an apartment or a detached house. The target area differs depending on the condominium or detached house, but may be on the same floor in the house, or may be a target area over a plurality of areas.
[0044]
Pressing the 24-hour ventilation button B5 for 3 seconds or more stops the 24-hour ventilation. When the ventilation for 24 hours is stopped, the fact that the ventilation for 24 hours is stopped is blinked on the LCD 32 to indicate to the user.
[0045]
The 24-hour ventilation mode in the operation control program has an air volume adjustment program for the ventilation device main body 1.
[0046]
This air volume adjustment program selects the ventilation air volume of the ventilation fan motor M1 by a combination of operation buttons B for drying, heating, cool air, ventilation, etc., a bathroom lighting switch S1, a washroom switch S2, and an on / off state of a toilet switch S3. Select the degree of opening of the dampers D1 to D3.
[0047]
That is, as shown in FIG. 1, when the 24-hour ventilation button B5 is pressed (step 1), the air volume adjustment program is started, and the ventilation button B5, bathroom lighting switch S1, toilet switch S2, and toilet switch S3 are turned on and off. Is determined (step 2), and the total ventilation air volume corresponding to the operation content of the ventilation button B5 and the on / off state of the bathroom lighting switch S1, the washroom switch S2, and the toilet switch S3 is determined from the stored correspondence table.
[0048]
In step 2, after the total ventilation air volume is determined by the operation contents of the ventilation button B5 and the ON / OFF state of the bathroom lighting switch S1, the toilet switch S2, and the toilet switch S3, the damper D1 to D3 is stored in the stored correspondence table. The corresponding opening data is called (step 3).
[0049]
When the corresponding opening data of the dampers D1 to D3 is called in step 3, the damper motors M3, M4, and M5 are rotated so as to correspond to the corresponding opening data, and the dampers D1 to D3 are set to a predetermined corresponding opening. (Step 4). The degree of opening of the dampers D1 to D3 is determined based on the maximum one of the selected ones (for example, fully open).
[0050]
For example, in the 24-hour ventilation mode in which the 24-hour ventilation button B5 is pressed, if the ventilation button B4, the toilet switch S2, and the toilet switch S3 are all off, the total ventilation air volume of the bathroom, the toilet, and the toilet is 60, for example. The cubic meter (hereinafter, cubic meter is omitted), and the amount of air sucked and discharged from each suction port is 40 in adjusting the opening degree of the dampers D1 to D3.
[0051]
When the local ventilation of the bathroom is selected in addition to the 24-hour ventilation mode, the total ventilation air volume is 70, the ventilation air volume of the bathroom is 60, and the ventilation air volumes of the toilet and the toilet are 10 respectively.
[0052]
When two local ventilation modes, bathroom and toilet, are selected in addition to the 24-hour ventilation mode, the total ventilation volume is calculated by adding the required ventilation air volume in the bathroom and bathroom and the minimum air volume in the toilet. The air volume is 80, the bathroom is 50, the lavatory is 30, and the toilet is 0. When the local ventilation of the bathroom and the toilet is selected in addition to the 24-hour ventilation mode, the total ventilation air volume is 170 by the above calculation method, and the air volume is 60 for the bathroom, 10 for the washroom, and 40 for the toilet. In this embodiment, the minimum air volume is set to 10, but this value is not limited to this and may be 0.
[0053]
In short, if you are in the 24-hour ventilation mode and require ventilation in the bathroom, toilet, or toilet, the ventilation in the corresponding room will be the maximum set airflow, and the airflow in the room not applicable will be a small amount. Has become.
[0054]
In addition, when in the 24-hour ventilation mode, and when bathing in the bathroom, the total ventilation air volume of the bathroom, the toilet, and the toilet is kept at 80, and the ventilation of the bathroom is set to the minimum air volume of 10; 30 toilets and toilets. If the ventilation of the lavatory is selected while bathing in the bathroom, the lavatory is set to the maximum air volume of 40 and the toilet is set to 30. If toilet ventilation is selected, the priority is given to toilets that want to drain quickly with a toilet of 40 and a washroom of 30.
[0055]
In addition, when in the 24-hour ventilation mode and the drying mode or the cool air mode is selected, the total ventilation air volume of the bathroom, the toilet, and the toilet is based on the minimum 60. In this state, when the drying button B1 and the cool air button B2 of the bathroom are selected, the ventilation air volume of the bathroom is selected to be 40 at medium speed. If neither the toilet nor the toilet is selected for the ventilation air volume 40 of the bathroom, the number of the toilet and the toilet is set to 10. If a washroom is selected for the ventilation air volume 40 of the bathroom, the washroom is set to 30 and the toilet is set to 0. If the toilet is selected with respect to the ventilation air volume 40 of the bathroom, the number of toilets is 30, and the number of toilets is 0.
[0056]
Further, in the 24-hour ventilation mode, when the heating button B3 is pressed, the ventilation air volume in the bathroom is set to 0, and the toilet and toilet are set to 30 regardless of the on / off state of the switch.
[0057]
When the bathroom, washroom, and toilet are all in a state of ventilation, the bathroom can be set to 60, the washroom and toilet can be set to 40, and the total ventilation air volume can be set to 130 and the maximum. Can be set to 40 and the total ventilation air volume can be set to 120.
[0058]
As described above, the ventilating apparatus according to this embodiment includes the first suction port 14, the second suction port 19, and the third suction port 20 for sucking air from a plurality of rooms, respectively. A ventilation fan 23 that draws air inside the house from the plurality of suction ports 14, 19, 20 and exhausts the air to the outside of the house to provide ventilation, and a target area to suck and discharge from the suction ports 14, 19, 20 are required. The microcomputer 32 (control means) for controlling the ventilation air flow according to each room while keeping the total ventilation air volume constant, and dampers D1 to D3 and damper motors M3, M4 in the suction ports 14, 19, 20. M5 (air volume adjusting means).
[0059]
The microcomputer 32 provides a 24-hour ventilation mode (constant ventilation mode) in which the entire house is constantly ventilated, and during execution of the 24-hour ventilation mode, the total ventilation air volume in the entire house or the total ventilation air volume in a plurality of rooms. Is controlled so that the ventilation air volume in each room becomes a predetermined air volume while keeping either of them constant.
[0060]
The required constant ventilation air volume (ventilation frequency) of the target area is determined by the volume (0.5 times / h) of each room as described above. In addition, the local ventilation airflow when each of the bathroom, toilet, and toilet is selected is determined. Control the ventilation airflow of the selected area to be constant, and for the unselected area, control the value set to satisfy the constant ventilation airflow of the target area of the entire house and approach the required constant ventilation airflow. I have. The numerical values of the respective air volumes are not limited to those described, but are variously varied depending on the target area.
[0061]
In particular, based on the ventilation air volume of a specific suction port such as a bathroom, a lavatory, and a toilet that performs local ventilation, the ventilation air volume of the suction ports of other rooms is adjusted to the ventilation volume of the room in accordance with the room, and the ventilation air volume of the room is suppressed. Since the damper motors M3, M4, and M5 are adjusted as described above, the local ventilation can be sufficiently performed while the total ventilation air volume in the 24-hour ventilation mode is kept constant.
[0062]
Alternatively, an airflow sensor or the like may be provided, and the airflow in each room may be calculated and controlled by a control program so as to be a predetermined number of times.
[0063]
Although the ventilation device of the present invention has been described with reference to a bathroom ventilation device, the invention is not limited to this, and can be applied to an indoor ventilation device.
[0064]
【The invention's effect】
According to the first ventilation device of the present application, it is possible to secure a ventilation airflow corresponding to each room while keeping a constant total ventilation airflow required for a target area such as an entire house.
[0065]
According to the second ventilation device of the present application, it is possible to perform appropriate ventilation according to a plurality of rooms while constantly performing ventilation (ventilation for 24 hours with a low air flow rate).
[0066]
According to the third ventilation device of the present application, by controlling the air volume adjusting means provided in the plurality of suction ports by the control means, while maintaining the total ventilation air volume in the target area such as the entire house or the plurality of rooms, By increasing or decreasing the amount of ventilation air in the room, it is possible to obtain the amount of ventilation air corresponding to each room.
[0067]
According to the fourth ventilation device of the present application, it is possible to make the ventilation air volume of a selected room (for example, a bathroom or the like) constant, and adjust the ventilation air volume of other rooms to an appropriate ventilation air volume according to each room. As a result, the total ventilation air volume of the entire house approaches a constant value.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a flow of air volume control of a ventilation device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the ventilation device of FIG.
FIG. 3 is a top plan sectional view of the ventilator of FIG. 1;
FIG. 4 is a longitudinal sectional view of the ventilation device of FIG. 1;
FIG. 5 is a schematic diagram showing a mechanism of a damper as air volume adjusting means.
FIG. 6 is a block diagram of a microcomputer as control means.
FIG. 7 is a plan view of a remote controller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ventilation apparatus main body 14 1st suction port 19 2nd suction port 20 3rd suction port 23 Ventilation fan D1-D3 Damper M1 Ventilation motor M2 Circulation motor M3 Damper motor M4 Damper motor M5 Damper motor 32 Microcomputer 33 Remote controller

Claims (4)

A plurality of suction ports for sucking air from a plurality of indoors, an air discharging means for performing ventilation by sucking air in the house from the plurality of suction ports and discharging the air to the outside of the house, and a plurality of suction ports for sucking air from the plurality of suction ports. A ventilator, comprising: a control unit that controls a ventilation airflow according to each room while satisfying a total ventilation airflow required by an area to be discharged. A ventilation device comprising a plurality of suction ports for sucking air from a plurality of rooms, respectively, and an air discharging means for sucking air in the house from the plurality of suction ports and discharging the air outside the house,
The control means for controlling the air discharging means, provided with a constant ventilation mode for constant ventilation of the target area, and during execution of the constant ventilation mode, while keeping the constant ventilation air volume in the target area constant, in each room A ventilation device provided with an air volume control function for controlling a ventilation air volume to a predetermined air volume. The ventilation device according to any one of the first and second ventilation devices, wherein a plurality of air inlets are provided with air volume adjusting means. On the basis of the ventilation air volume from the suction port selected from among the plurality of suction ports, the ventilation air volume of the suction port that is not selected is made smaller than at the time of selection, so that the target area has the required ventilation air volume, The ventilation device according to any one of claims 1 to 3, wherein the adjustment device is adjusted.

Images