JP4042553B2 - Bathroom ventilator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilator that maintains a constant ventilation airflow per unit time such as a detached house or an apartment house.
[0002]
[Prior art]
Recent houses are becoming more airtight and 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 cloth. .
[0003]
For this reason, the range hood fan in the kitchen, the duct fan that forcibly exhausts the air from the bathroom, washroom, toilet, etc. are frequently activated to provide appropriate ventilation, and the concentration of carbon dioxide, formaldehyde, VOC, etc. In addition, it is preferable to keep the humidity low and prevent allergy.
[0004]
In particular, oil fan heaters, etc. used in a closed room without ventilation for a long time may lead to oxygen deficiency, increased carbon dioxide concentration, causing headaches, etc., and humidity and mold and ticks may occur. However, it is a problem that it is an allergic factor, and frequent ventilation is desired in highly airtight houses such as apartments.
[0005]
Therefore, it is required to perform 24-hour ventilation, which always performs ventilation in the house. The 24-hour ventilation is a constant ventilation with a low air volume, and in an apartment house, for example, ventilation of about 0.5 times / hour of the volume of each room so as to satisfy the necessary ventilation volume in each room. Is needed. The air volume for the 24-hour ventilation is set in advance when the house is constructed so that the necessary air volume can be obtained in advance.
[0006]
Therefore, when ventilating multiple rooms at the same time, if 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. Some have attempted to secure the local ventilation air volume by increasing the fan rotation speed of the ventilation device.
[0007]
As a prior art related to multi-room ventilation, a “multi-room ventilation device” shown in Patent Document 1 is known. This “multi-room ventilation device” “ventilates bathrooms, toilets and toilets” and “makes bathroom moisture not enter the toilets and toilets, and prevents toilet odors from leaking into bathrooms and toilets” "The bathroom side air inlet, the toilet side air inlet, and the toilet air inlet are formed on the air intake side of the blower, and each air intake can be opened and closed with a damper. One room can be ventilated, and each room should not communicate with each other. "
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 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 ventilation of a room subject to local ventilation is started, the opening area of the suction port of the other room is not “0”, and ventilation of each room is performed simultaneously. For this reason, there is a possibility that the ventilation air volume is deprived to a room other than the local ventilation, and the ventilation air volume of the room subject to local ventilation cannot be obtained sufficiently. In addition, when trying to secure the local ventilation air volume, the number of rotations of the fan must be increased, which may increase noise.
[0010]
Furthermore, conventionally, when the toilet or bathroom is ventilated, the total ventilation volume of the entire house changes, so if the total exhaust volume is too high in airtight condominiums and detached houses, the energy saving effect such as cooling is impaired in summer. In winter, however, there is a problem that the amount of airflow from the natural air intake becomes strong and the heating effect decreases.
[0011]
In addition, when the wind pressure is strong, air flows backward into the house from the exhaust port facing the outside of the house through the pipe, so there is a problem that the ventilation air volume is reduced or condensation is generated around the pipe due to the backflow of air. .
[0012]
The present application was made paying attention to such a problem, and in the case of performing ventilation for 24 hours, the total ventilation air volume of the house was kept constant regardless of the fluctuation of the wind pressure of the outside air, and was adapted to each room. It aims at providing the ventilator which can perform appropriate local ventilation.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1 includes a bathroom suction port for sucking in air in the bathroom, a suction port in another room for sucking in air in another room, and a plurality of the suction ports. By exhausting the air in the house sucked from the main body provided with an exhaust port for exhausting the sucked air and the suction port of the bathroom and the suction port of the other room to the outside of the house through the exhaust port An air discharge means for performing ventilation; an air volume adjusting means for adjusting the opening degree of each of the suction ports, and a control means for controlling the air discharge means and the air volume adjusting means; A bathroom ventilator comprising:
The remote controller for operating the bathroom ventilator is provided with an operation button in a 24-hour ventilation mode for performing continuous ventilation in a plurality of rooms,
The control means includes
According to the operation of the remote controller and the operation of a switch provided in another chamber, the air discharge means is controlled, and the corresponding opening degree of each suction port is read from the stored correspondence table, Adjust the air volume adjusting means so that
When the 24-hour ventilation mode is set by the operation of the operation button when the 24-hour ventilation mode is not set, the 24-hour ventilation mode is executed.
If the operation button is pressed for a predetermined time during the execution of the 24-hour ventilation mode, the ventilation is stopped for 24 hours,
While the 24-hour mode is being executed, while the constant ventilation airflow set in a plurality of rooms is satisfied, the ventilation airflow in the selected room is selected for the room selected by the operation of the remote controller or the switch of another room. Adjusting the air discharge means and the air volume adjusting means so as to be a set air volume, and adjusting the air volume adjusting means provided at the suction port in the unselected room for the unselected room, It has the air volume control function which was made to suppress .
[0014]
The invention of claim 2 includes a circulation air passage that sucks air in the bathroom and circulates the sucked air into the bathroom, and a circulation fan and a heater provided in the circulation air passage,
When the heating mode is selected by the heating button provided in the remote controller, the control means operates the circulation fan and the heater so as to blow air into the bathroom from the circulation air passage, When the heating mode is selected during execution of the 24-hour ventilation mode, the heating mode is executed and the air volume adjusting means is adjusted so as not to ventilate the bathroom .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a ventilator according to an embodiment of the present application will be described with reference to the drawings.
[0018]
2 to 4 schematically show the main configuration of the ventilator body 1 installed in a bathroom, a dressing room, or the like. A body case 2 that covers the outside of the ventilator body 1 is attached to the ceiling of the bathroom 3. As shown in FIGS. 2 and 3, the main body case 2 is provided with two upper and lower units, and the lower unit 6 on the bathroom side is a cylindrical centrifugal circulation fan 7 that sucks air from the bathroom 3. Are formed, a circulation air passage 9 for circulating the sucked air to the bathroom 3, and a first suction port 14 for guiding the air of 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 stored inside the fan case 10, and a suction opening 8 for sucking air in the bathroom 3 is formed in the fan case 10. A PTC heater (Positive Temperature Coefficient heater) 11 is provided in the circulation air passage 9. A temperature sensor (not shown) composed of a thermistor is installed in the vicinity of the circulation exhaust opening. In addition to the PTC heater 11, a carbon heater 12 may be provided. The carbon heater 12 can warm the bather by radiant heat when the bath heating mode is provided.
[0020]
A fan motor M2 for rotating the circulation fan 7 is attached to the upper part of the fan case 10, and the circulation fan 7 is fixed to the 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. After the air in the bathroom 3 is sucked into the upper unit 13, the upper unit 13, the main body Exhaust (ventilation) is possible 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 from the first suction port 14 and the suction opening 15 and moved along the inner wall of the upper unit 13, and exhausted from the exhaust port 16 to the outside of the building through the duct joint 17A and the duct 18A (ventilation). )
[0023]
As shown in FIG. 3, a second suction port 19, a third suction port 20, and a fourth suction port 21 are provided in the side wall of the main body case 2 to ventilate a bathroom other than the bathroom and other rooms. The intake ports 19 and 20 are provided with dampers D2 and D3, and are respectively provided with duct joints 17B, and the intake ducts 22 are connected to the duct joints 17B. The fourth suction port 21 is closed.
[0024]
The dampers D1 to D3 of the first suction port 14, the second suction port 19, and the third suction port 20 are provided as air volume adjusting means. As shown in FIG. 5, these dampers D1 to D3 include 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, and 25C attached to the ends of the rotary shafts 24A, 24B, and 24C.
[0025]
Both end portions of the rotary shafts 24A, 24B, 24C are rotatably held at opposite edges of the suction ports 19-21 so that the gears 25A, 25B, 25C are located outside the suction ports 19-21. Installed. A driving gear 26 is fixed to one of the three rotating shafts 24A. The gear 26 is driven by a damper motor M3 (hereinafter, the dampers D1 and D2 are also driven by the damper motors M4 and M5). Is engaged with the gear 27 fixed to the output shaft and is driven by the damper motor M3. The dampers D1 and D2 are also driven by damper motors M4 and M5 through a similar mechanism.
[0026]
The damper motor M3 is connected to a motor drive circuit 28 as an interface. Damper motors M4 and M5 are similarly connected to motor drive circuits 29 and 30. The motor drive circuits 28 to 30 are provided with a circuit for switching between forward rotation and reverse rotation of the damper motors M3, M4, and M5, and perform forward and reverse rotations of the damper motors M3, M4, and M5 by the control of the control unit 31. Control the power supply. The control unit 31 (see FIG. 3) is provided on the upper part of the upper unit 13. Note that the damper motor may not be a forward / reverse rotation 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 and M2, the motor drive circuits 28, 29 and 30, the PTC heater 11 and the like.
[0028]
The power supply circuit supplies the power of the commercial power supply in the home to the PTC heater 11, fan motors M 1 and M 2, damper motors M 3, M 4 and M 5, and converts the commercial power supply to low-voltage direct current and supplies it to the microcomputer 32. .
[0029]
As shown in FIG. 6, the microcomputer 32 includes a PTC heater 11, temperature sensors, fan motors M1, M2, damper motors M3, M4, M5, bathroom lighting switch S1, toilet ventilation switch S2, and toilet ventilation switch S3. It is connected.
[0030]
The bathroom lighting switch S1 is formed by connecting a series circuit composed of a resistor and a rectifier in parallel to the ground line of the lighting power switch provided on the entrance wall surface of the bathroom. Detect that is lit. The toilet ventilation switch S2 and the toilet ventilation switch S2 are configured by ventilation switches installed in a bathroom, a washroom, and a toilet.
[0031]
Further, a remote controller 33 is connected to the microcomputer 32 via a control line 34. The remote controller 33 includes a dry 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 according to the operation of the operation buttons B1 to B9, and includes 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 toilet ventilation switch S2, and the toilet ventilation switch S3.
[0034]
When the “dry” button B1 is pressed, the ventilation device main body 1 enters the drying mode, the circulation fan motor M2 rotates at a high speed, the ventilation fan motor M1 rotates at a medium speed, and the PTC heater 11 generates heat. It becomes possible to dry clothes and the like.
[0035]
When the “cool breeze” button B2 is pressed, the ventilator main body 1 enters the cool breeze mode, the circulation fan motor M2 rotates at a high speed, and the ventilation fan motor M1 rotates at a medium speed.
[0036]
When the “heating” button B3 is pressed, the ventilator 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 a strong ventilation B4a and a weak ventilation B4b. When the ventilation strength B4a of the ventilation button B4 is pressed, the ventilation device body 1 enters the ventilation strength mode, and the ventilation fan motor M1 rotates at high speed. When the ventilation weak B4b of the ventilation button B4 is pressed, the ventilator main body 1 enters the ventilation weak mode, and the ventilation fan motor M1 rotates at a low speed. When the ventilation button B4 is pressed while the bathroom lighting switch S1 is 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 main body 1, and the "heater", "cool breeze""dry"" Perform “ventilation”.
[0039]
When the drying button B1, the cool air button B2, the heating button B3, and the ventilation button B4 are pressed, the backlight illumination is turned on to indicate that the designated 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 starts at the commanded time and ends.
[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 cut time (remaining operation 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 a method in which continuous ventilation is performed with a low air volume. In an apartment, the required ventilation air volume per unit time in each room, which is the target area (the number of ventilations, for example, 0.5 times the volume of each room). Ventilation air volume per hour is set according to the volume obtained by multiplying the total floor area by the height in an apartment / detached house. The target area differs depending on the apartment and the detached house, but may be on the same floor in the house, or may be the target area across a plurality of areas.
[0044]
When the 24-hour ventilation button B5 is pressed for 3 seconds or more, the 24-hour ventilation stops. When the 24-hour ventilation is stopped, the LCD 32 blinks and indicates to the user that the 24-hour ventilation is stopped.
[0045]
The 24-hour ventilation mode in the operation control program has an air volume adjustment program of the ventilator body 1.
[0046]
This air volume adjustment program selects the ventilation air volume of the ventilation fan motor M1 according to the combination of the ON / OFF state of the operation button B for drying, heating, cool air, ventilation, etc., the bathroom lighting switch S1, the toilet switch S2, and the toilet switch S3. The opening degree of the dampers D1 to D3 is selected.
[0047]
That is, as shown in FIG. 1, when the ventilation button B5 is pressed for 24 hours (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 / off. (Step 2), 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 toilet 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 content 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 dampers D1 to D3 are stored in the stored correspondence table. Corresponding opening degree 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 the predetermined corresponding opening. (Step 4). In addition, the opening degree of the dampers D1 to D3 is determined with a reference (for example, fully open) being the maximum among the selected ones.
[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 in the bathroom, the toilet, and the toilet is, for example, 60 Cubic meters (hereinafter abbreviated as cubic meters) are used, and in the adjustment of the openings of the dampers D1 to D3, the amount of air sucked and discharged from each suction port is 40.
[0051]
When local ventilation in the bathroom is selected in addition to the 24-hour ventilation mode, the total ventilation volume is 70, the ventilation volume in the bathroom is 60, and the ventilation volume in the bathroom and toilet is 10, respectively.
[0052]
In addition to the 24-hour ventilation mode, when two local ventilations are selected for the bathroom and the washroom, the total ventilation required for the bathroom and the washroom is added together, and the minimum ventilation for the toilet is added together. The air volume is 80, the bathroom is 50, the washroom is 30, and the toilet is 0. When the local ventilation of the bathroom and toilet is selected in addition to the 24-hour ventilation mode, the total ventilation air volume is 170, and the air volume is 60, the bathroom 10, and the toilet 40 according to the calculation method. 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 a 24-hour ventilation mode and ventilation in any of the bathrooms, washrooms, and toilets is required, the corresponding indoor ventilation will be the maximum set air volume, and the non-applicable indoor air volume will be small. It has become.
[0054]
In addition, when in the 24-hour ventilation mode and taking a bath in the bathroom, the total ventilation air volume of the bathroom, toilet, and toilet is kept at 80, and the ventilation of the bathroom is all set to the minimum air volume of 10, There are 30 toilets and toilets. If ventilation in the bathroom is selected while bathing in the bathroom, the bathroom has a maximum air volume of 40 and the toilet has 30. If toilet ventilation is selected, priority will be given to toilets that are expected to be discharged quickly, with toilets set to 40 and toilets set to 30.
[0055]
In addition, when the ventilation mode is 24 hours and the drying mode or the cool air mode is selected, the total ventilation air volume of the bathroom, the washroom, and the toilet is based on a minimum of 60. In this state, when the bathroom dry button B1 and the cool air button B2 are selected, the ventilation air volume in the bathroom is selected at a medium speed of 40. If neither toilet nor toilet is selected for the ventilation air volume 40 in the bathroom, the toilet / toilet is set to 10. If a bathroom is selected for the ventilation air volume 40 in the bathroom, the bathroom is set to 30 and the toilet is set to 0. Moreover, if a toilet is selected with respect to the ventilation air volume 40 of a bathroom, a toilet will be 30 and a toilet will be 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 washroom / toilet is set to 30 regardless of whether the switch is on or off.
[0057]
When all of the bathroom, washroom, and toilet are ventilated, it is possible to set the bathroom to 60 and the washroom / toilet to 40, respectively, so that the total ventilation volume is 130 and maximum. In any case, the total ventilation air volume can be set to 120 as 40.
[0058]
As described above, the ventilator 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. Ventilation fan 23 that ventilates by sucking air in the house from a plurality of suction ports 14, 19, and 20 and exhausting it outside the house, and a target area that sucks and discharges from the suction ports 14, 19, and 20 are required The microcomputer 32 (control means) that controls the ventilation air volume according to each room while keeping the total ventilation air flow constant, and the dampers D1 to D3 and the damper motors M3, M4 to the suction ports 14, 19, 20 M5 (air volume adjusting means) is provided.
[0059]
The microcomputer 32 is provided with a 24-hour ventilation mode (always ventilation mode) in which the entire house is constantly ventilated, and during the 24-hour ventilation mode, the total ventilation air volume in the entire house or the total ventilation air volumes in a plurality of rooms is provided. The ventilation air volume in each room is controlled so as to become a predetermined air volume while keeping any of the above constant.
[0060]
The constant ventilation air volume (the number of ventilations) required for the target area is determined by the volume (0.5 times / h) in each room, as described above. Moreover, the local ventilation air volume is determined when each of the bathroom, washroom, and toilet is selected. Control the ventilation air volume of the selected area to a certain level, and control the unselected area to a value that is set to meet the normal ventilation air volume of the target area of the entire house and to be close to the required constant ventilation air volume. Yes. The numerical value of each air volume is not limited to what has been described, but varies depending on the target area.
[0061]
In particular, based on the ventilation air volume of a specific air inlet, such as a bathroom, washroom, or toilet, where local ventilation is performed, adjust the air volume of other indoor air inlets to the room to reduce the air volume of the room. Thus, since the damper motors M3, M4, and M5 are adjusted, local ventilation can be sufficiently performed while keeping the total ventilation air volume in the 24-hour ventilation mode constant.
[0062]
Further, an air volume sensor or the like may be provided, and the air volume in each room may be calculated and controlled by a control program so as to be a predetermined number of times.
[0063]
In addition, although the ventilator of this invention demonstrated the bathroom ventilator, it is not limited to this, It can apply also to an indoor ventilator.
[0064]
【The invention's effect】
According to the present invention, it is possible to obtain a ventilation air volume corresponding to each room by increasing or decreasing the ventilation air volume in each room while keeping the total ventilation air volume necessary for the target area such as the entire house constant .
[Brief description of the drawings]
FIG. 1 is a flowchart showing a flow of air volume control of a ventilator according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the ventilation device of FIG.
3 is a top cross-sectional view of the ventilation device of FIG. 1. FIG.
4 is a longitudinal sectional view of the ventilation device of FIG.
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 Ventilator main body 14 1st inlet 19 Second inlet 20 Third inlet 23 Ventilation fans D1-D3 Damper M1 Ventilation motor M2 Circulation motor M3 Damper motor M4 Damper motor M5 Damper motor 32 Microcomputer 33 Remote controller

Claims (2)

A main body provided with a bathroom suction port for sucking in air in the bathroom, a suction port in another room for sucking in air in other rooms, and an exhaust port for exhausting air sucked from the plurality of suction ports And air exhaust means for performing ventilation by exhausting the air in the house sucked from the suction port of the bathroom and the suction port of the other room to the outside of the house through the exhaust port, and the suction of the bathroom and the other room A ventilation device for a bathroom provided with an air volume adjusting means that is provided at the mouth and adjusts the opening degree of each suction port, and a control means that controls the air discharge means and the air volume adjusting means,
The remote controller for operating the bathroom ventilator is provided with an operation button in a 24-hour ventilation mode for performing continuous ventilation in a plurality of rooms,
The control means includes
According to the operation of the remote controller and the operation of a switch provided in another chamber, the air discharge means is controlled, and the corresponding opening degree of each suction port is read from the stored correspondence table, Adjust the air volume adjusting means so that
When the 24-hour ventilation mode is set by the operation of the operation button when the 24-hour ventilation mode is not set, the 24-hour ventilation mode is executed.
If the operation button is pressed for a predetermined time during the execution of this 24-hour ventilation mode, the 24-hour ventilation is
While the 24-hour mode is being executed, while the constant ventilation airflow set in a plurality of rooms is satisfied, the ventilation airflow in the selected room is selected for the room selected by the operation of the remote controller or the switch of another room. Adjusting the air discharge means and the air volume adjusting means so as to be a set air volume, and for an unselected room, adjusting the air volume adjusting means provided at the suction port in the unselected room, A ventilating apparatus for a bathroom characterized by having an air volume control function that suppresses airflow . A circulation air passage for sucking air in the bathroom and circulating the sucked air into the bathroom, and a circulation fan and a heater provided in the circulation air passage;
When a heating mode is selected by a heating button provided in the remote controller, the control means operates the circulation fan and the heater so as to blow air into the bathroom from the circulation air passage, The air volume adjusting means is adjusted so that the heating mode is executed and the bathroom is not ventilated when the heating mode is selected during execution of the 24-hour ventilation mode. The bathroom ventilator as described.

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