JP2014025603A - Ventilation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation apparatus configured to suppress generation of sound and an increase of power consumption so as to suppress counterflow of air into a room with a simple configuration.SOLUTION: A bathroom ventilation drying heating apparatus 1A includes: a 24-hour ventilation operation mode to perform a ventilation operation for the entirety of a building, including a bathroom 100, and a wash and dressing room 102 and a toilet 103 as other rooms, by a constant ventilation air volume; and a slight air volume ventilation operation mode to suppress an air flow from the bathroom 100 to the other rooms and an air flow from the other rooms to the bathroom 100 by a slight air volume set to be a smaller air volume than the constant ventilation air volume. Even when the 24-hour ventilation operation mode is stopped, the slight air volume ventilation operation mode is executable.

Description

  The present invention relates to a ventilator that ventilates a building, and more particularly, to a ventilator that can ventilate a bathroom and other rooms such as a toilet.

  As a ventilation device installed in a building, a ventilation device called a bathroom ventilation drying and heating device that can ventilate a bathroom and other rooms such as a washroom and a restroom has been proposed.

  The bathroom ventilation drying and heating device is configured such that the device main body is installed on the ceiling of the bathroom, and the device main body and the other room are connected via a duct so that the bathroom and the other room are connected via the bathroom ventilation drying and heating device. A simple air passage is formed.

  For this reason, with the bathroom ventilation drying and heating system stopped, the flow of air through the air path between rooms due to factors such as temperature fluctuations between rooms and pressure fluctuations due to door opening and closing Can occur. When air flows between rooms, moisture in the bathroom may flow to other rooms and condensation may occur. In addition, odor generated in the toilet may leak into the bathroom.

  In view of this, a technology has been proposed in which a damper that can be opened and closed in the air path is provided to suppress the backflow of air (for example, see Patent Documents 1 and 2).

JP 2004-36945 A Japanese Utility Model Publication No. 58-96441

  However, in the configuration in which the damper is provided in the air passage, the cost increases as the number of parts increases. Moreover, a damper in the air passage leads to an increase in ventilation resistance. Furthermore, when the damper is configured to be opened and closed by a motor or the like, wiring work is required, and workability is deteriorated. On the other hand, if the ventilation operation is continued, the backflow of air can be suppressed, but this leads to generation of sound and increase in power consumption.

  The present invention has been made to solve such problems, and provides a ventilating apparatus that suppresses the backflow of air to the room by suppressing the generation of sound and the increase in power consumption with a simple configuration. For the purpose.

  In order to solve the above-described problems, the present invention is directed to air blowing means that sucks air from one room and air from another room and exhausts the air to the outside, the flow of air from one room to another room, and from one room to another. Control means for suppressing the flow of air by blowing by the blowing means, and the control means performs a ventilation operation of the entire building including the one room and the other rooms with the first ventilation air volume. And a second ventilation operation mode that suppresses the flow of air from one room to the other room and the flow of air from the other room to the one room with the second ventilation air volume set to be smaller than the first ventilation air volume. Even if the first ventilation operation mode is stopped, the second ventilation operation mode can be executed even if the first ventilation operation mode is stopped.

  In the present invention, when the second ventilation operation mode is executed, ventilation that suppresses the flow of air flowing back to each room is performed between the one room where the air passage connected through the ventilation device is formed and the other room. Done. Even if the first ventilation operation mode in which one room and other rooms are ventilated is stopped, the second ventilation operation mode is executed, so that the backflow of air to each room is suppressed, and odor leakage and Condensation is suppressed. Thereby, it is not necessary to provide a damper in the air passage for suppressing the backflow of air.

  According to the ventilator of the present invention, by providing an operation mode in which ventilation operation is performed with a ventilation air volume that suppresses the flow of air from one room to another room and the flow of air from another room to one room, By suppressing the backflow of air, it is possible to suppress the occurrence of odor leakage and condensation.

  Since the ventilation air volume that suppresses the backflow of air is suppressed to be lower than the normal ventilation air volume, the generation of sound can be suppressed, and power consumption can be suppressed even in continuous ventilation operation.

  In addition, since the backflow of air to each room can be suppressed in the operation mode with a predetermined ventilation airflow, there is no need to provide a damper for suppressing the backflow of air in the air passage, and the damper It becomes unnecessary.

It is a whole block diagram which shows an example of the bathroom ventilation drying heating apparatus of this Embodiment. It is an internal block diagram which shows an example of the bathroom ventilation drying heating apparatus of this Embodiment. It is a block diagram which shows an example of the control function of the bathroom ventilation drying heating apparatus of this Embodiment. It is a block diagram which shows an example of an operation part. It is a flowchart which shows the 1st example of operation in the slight air volume ventilation operation mode. It is a flowchart which shows the 2nd operation example of a slight air volume ventilation operation mode. It is a flowchart which shows the 3rd operation example in the slight air volume ventilation operation mode. It is a flowchart which shows the 4th example of operation | movement in the slight air volume ventilation operation mode. It is a flowchart which shows the 5th example of operation | movement in the slight air volume ventilation operation mode. It is a flowchart which shows the 6th example of operation in the fine air volume ventilation operation mode. It is a block diagram which shows the modification of the control function of the bathroom ventilation drying heating apparatus of this Embodiment.

  Hereinafter, an embodiment of a bathroom ventilation drying and heating apparatus as a ventilation apparatus of the present invention will be described with reference to the drawings.

<Configuration Example of Bathroom Ventilation Drying and Heating Device of this Embodiment>
FIG. 1 is an overall configuration diagram illustrating an example of a bathroom ventilation drying / heating apparatus according to the present embodiment, and FIG. 2 is an internal configuration diagram illustrating an example of a bathroom ventilation drying / heating apparatus according to the present embodiment.

  As shown in FIG. 1, bathroom ventilation drying / heating apparatus 1 </ b> A according to the present embodiment has apparatus body 10 installed on ceiling 100 a of bathroom 100. In the bathroom ventilation drying / heating apparatus 1A, a front panel 11 having an inlet grill 11a into which air is sucked and an outlet grill 11b from which air is blown out is attached to the lower surface of the apparatus body 10, and the front panel 11 is attached to the ceiling of the bathroom 100. 100a exposed.

  An exhaust duct 12 is connected to the bathroom ventilation drying / heating apparatus 1 </ b> A installed on the ceiling 100 a of the bathroom 100. The exhaust duct 12 is connected to an outdoor grill 12a installed on an outer wall 101 of a building (not shown).

  The bathroom ventilation drying / heating apparatus 1A is connected to one or a plurality of sub suction ducts, in this example, two sub suction ducts 13. One sub-suction duct 13 is connected to a sub-suction grill 13a installed at 102a on the ceiling of the washroom 102, which is another room, and the other sub-suction duct 13 is connected to the toilet 103, which is another room. It is connected to the auxiliary inlet grill 13a installed at 103a on the ceiling. In addition, in this example, although it was set as the structure in which air is sucked from both the washroom 102 and the toilet 103 as another room, it is good also as a structure in which air is sucked from either one.

  The bathroom ventilation drying / heating apparatus 1A sucks the air in the bathroom 100 from the suction grill 11a of the apparatus main body 10 and exhausts the air to the outside through the exhaust duct 12, and also includes the washroom 102 and the toilet 103 which are other rooms. A ventilation fan 2 is provided which sucks air from the auxiliary inlet grill 13a through the auxiliary inlet duct 13 and exhausts the air outside through the exhaust duct 12.

  The bathroom ventilation drying / heating apparatus 1 </ b> A includes a circulation fan 3 that sucks air from the bathroom 100 from the suction grill 11 a of the apparatus body 10 and blows it out from the blowout grill 11 b of the apparatus body 10 to the bathroom 100. The heater 4 which controls the temperature of the air which blows off from the blower outlet grill 11b to the bathroom 100 is provided.

  The ventilation fan 2 is an example of a ventilation blower means that is a blower means, and is configured by a centrifugal fan that sucks air from the axial direction and blows it out in the centrifugal direction. As shown in FIG. 2, the ventilation fan 2 includes a multiblade impeller 20, a ventilation fan motor 21 that rotates the impeller 20, and a ventilation fan case 22 that forms an air passage.

  In the ventilation fan 2, a ventilation fan blowing air passage 22 a is formed by a ventilation fan case 22 in which air is sucked from the axial direction of the impeller 20, and air is blown out to the side along the centrifugal direction of the impeller 20. Is done.

  The circulation fan 3 is an example of a circulation blower means that is a blower means, and is constituted by a centrifugal fan like the ventilation fan 2. As shown in FIG. 2, the circulation fan 3 includes a multiblade impeller 30, a circulation fan motor 31 that rotates the impeller 30, and a circulation fan case 32 that forms an air passage.

  In the circulation fan 3, the circulation fan case 32 forms a circulation fan blowing air passage 32 a in which air is sucked in from the axial direction of the impeller 30 and air is blown out toward the side along the centrifugal direction of the impeller 30. Is done.

  The bathroom ventilation drying / heating apparatus 1 </ b> A has a configuration in which the ventilation fan 2 is disposed on the upper side of the circulation fan 3. In the ventilation fan 2, air is sucked into the upper surface of the ventilation fan case 22 along the axial direction of the impeller 20. A ventilation fan suction port 22b is formed.

  In the bathroom ventilation drying / heating apparatus 1A, a bathroom suction air passage 23 is formed on the side of the ventilation fan case 22 and the circulation fan case 32, and a ventilation fan suction is provided on the lower surface of the apparatus body 10 via the bathroom suction air passage 23. A ventilation suction port 22c communicating with the port 22b is formed.

  Further, in the bathroom ventilation drying / heating apparatus 1 </ b> A, the other room suction air passage 24 is formed above the ventilation fan case 22 and the circulation fan case 32, and the other room suction air passage 24 is formed on one side surface of the apparatus body 10. A single or a plurality of sub-suction ports communicating with the ventilation fan suction port 22b, in this example, two sub-suction ports 22d are formed.

  In the bathroom ventilation drying / heating apparatus 1 </ b> A, an exhaust outlet 22 e communicating with the ventilation fan outlet air passage 22 a of the ventilation fan 2 is formed on the other side surface of the apparatus body 10.

  The bathroom ventilation drying / heating apparatus 1 </ b> A is a device in which a part of the lower surface of the apparatus main body 10 is constituted by the lower surface of the circulation fan case 32, and in the circulation fan 3, the lower surface of the circulation fan case 32 along the axial direction of the impeller 30. A circulation fan suction port 32 b through which air is sucked is formed on the lower surface of the main body 10.

  Further, the bathroom ventilation drying / heating apparatus 1A includes a circulation fan blowout port 32c in which air is blown to the lower surface of the apparatus body 10 which is the lower surface of the circulation fan case 32 in the circulation fan 3 so as to communicate with the circulation fan blowout air passage 32a. Is formed, and the heater 4 is provided inside the circulation fan outlet 32c.

  The heater 4 is an example of a heating unit, and in this example, is constituted by a PTC heater. The bathroom ventilation drying / heating apparatus 1A generates heat when the heater 4 is energized, and heats the air blown from the circulation fan outlet 32c.

  1 A of bathroom ventilation drying heating apparatuses are equipped with the metal case 5 of the shape which covers the side surface and upper surface of the apparatus main body 10. FIG. In the bathroom ventilation drying / heating apparatus 1A, a ventilation fan case 22 and a circulation fan case 32 made of a resin material are covered with a metal case 5, and between the metal case 5 and the side surfaces of the ventilation fan case 22 and the circulation fan case 32. The bathroom suction air passage 23 is formed in a communicating space formed between the metal case 5 and the upper surface of the ventilation fan case 22.

  Further, in the bathroom ventilation drying / heating apparatus 1 </ b> A, the other room suction air passage 24 is formed in a communication space formed between the metal case 5 and the upper surfaces of the ventilation fan case 22 and the circulation fan case 32.

  In the bathroom ventilation drying / heating apparatus 1A, the ventilation inlet 22c and the circulation fan inlet 32b are connected to the inlet grill 11a of the front panel 11, and the circulation fan outlet 32c is connected to the outlet grill 11b of the front panel 11.

  In the bathroom ventilation drying / heating apparatus 1 </ b> A, the exhaust duct joint 50 is attached to the exhaust outlet 22 e, and the exhaust duct 12 is connected to the exhaust duct joint 50. In the bathroom ventilation drying / heating apparatus 1 </ b> A, the sub suction duct joint 51 is attached to each of the two sub suction ports 22 d in this example, and the sub suction duct 13 is connected to each of the sub suction duct joints 51.

  As a result, the bathroom ventilation drying / heating apparatus 1 </ b> A includes the bathroom 100, the washroom 102 and the toilet 103, the bathroom suction air passage 23 and the other room suction air passage 24 in the apparatus body 10, and the auxiliary suction duct 13. It is connected to the wind path. Note that the bathroom ventilation drying / heating apparatus 1A as a ventilation device has a configuration in which a circulation fan and a ventilation fan are independently provided as a blowing means, but a ventilation fan and the like are provided with a damper or the like for switching an air path. The structure which implement | achieves a means and a circulation ventilation means may be sufficient. Moreover, the structure which performs only ventilation may be sufficient.

<Control function example of bathroom ventilation drying and heating device of the present embodiment>
FIG. 3 is a block diagram illustrating an example of a control function of the bathroom ventilation drying / heating apparatus according to the present embodiment.

  The bathroom ventilation drying and heating apparatus 1A includes a control unit 6 having a nonvolatile memory such as a CPU and an EEPROM, an operation unit 7, the ventilation fan motor 21 described in FIGS. The heater 4 is connected.

  The control unit 6 is an example of a control unit. As an operation mode to be executed in accordance with a predetermined program set in advance, a 24-hour ventilation operation mode in which normal ventilation operation is performed with a predetermined first ventilation air volume, and a 24-hour ventilation operation. There is a fine air volume ventilation operation mode in which the ventilation operation is performed with the second ventilation air volume set to be less than the first ventilation air volume in the mode.

  The 24-hour ventilation operation mode is an example of a first ventilation operation mode, and ventilation of the entire building (not shown) including the bathroom 100, the washroom 102, and the toilet 103 is performed. The first ventilation air volume is set to an air volume that can replace the air in the entire building (not shown) including the bathroom 100, the washroom 102, and the toilet 103 in a predetermined time by performing continuous or intermittent continuous ventilation.

  Thus, the 1st ventilation air volume which can replace the air of a building by the regular ventilation for a predetermined time is called constant ventilation air volume. In the 24-hour ventilation operation mode, continuous ventilation operation may be performed with constant ventilation air flow, or the ventilation fan 2 is driven for a certain period of time so that the air in the building can be replaced at a predetermined time, and other ventilation fans for a certain period of time. The ventilation may be performed constantly by intermittent ventilation operation, such as by stopping 2.

  The slight air volume ventilation operation mode is an example of the second ventilation operation mode, and the bathroom 100 as one room and the bathroom dressing room as another room between the rooms where the air passage connected through the bathroom ventilation drying / heating apparatus 1A is formed. The ventilation which suppresses the flow of the air which flows into 102 and the toilet 103 is performed.

  The bathroom 100 in which the bathroom ventilation drying and heating apparatus 1A is installed, and the bathroom dressing room 102 and the toilet 103 connected to the bathroom ventilation drying and heating apparatus 1A through the auxiliary suction duct 13 are connected to the bathroom suction air passage 23 in the apparatus main body 10. And the other room suction air passage 24 and the auxiliary suction duct 13, and are connected between the bathroom 100 and the washroom 102, between the bathroom 100 and the toilet 103, and between the washroom 102 and the toilet 103. An air passage through which air flows is formed.

  For this reason, the flow of air can occur between the chambers through the air passages such as the sub-suction duct 13 due to variations in temperature between the chambers and variations in atmospheric pressure due to opening and closing of the doors. When air flows between the rooms, moisture in the bathroom 100 may flow to the washroom 102 or the toilet 103. In addition, odor generated in the toilet 103 may flow into the bathroom 100.

  Therefore, the ventilation operation is performed with the second ventilation air volume that suppresses the flow of air between the bathroom suction air passage 23 and the other room suction air passage 24 in the apparatus main body 10 and the room where the air passage is connected through the auxiliary suction duct 13. It is equipped with a slight air volume ventilation operation mode.

  The second ventilation air volume, which is the ventilation air volume in the slight air volume ventilation operation mode, is the air flow from the bathroom 100 to the washroom 102 and the bathroom 100 to the toilet 103. The air flow from the dressing room 102 to the bathroom 100 and from the toilet 103 to the bathroom 100 is set to such an extent that the flow of air flowing back to the bathroom 100 can be suppressed.

  Further, in the configuration in which the bathroom dressing room 102 and the toilet 103 are connected as the bathroom ventilation / drying / heating apparatus 1A and a plurality of other rooms, the bathroom undressing is performed via the auxiliary suction duct 13 and the other room suction air passage 24 in the apparatus body 10. Since the place 102 and the toilet 103 are connected, an air flow between other rooms can occur. For this reason, ventilation air volume is set so that the flow of the air between other rooms can be suppressed.

  Further, the bathroom ventilation drying / heating apparatus 1A is connected to the outside through the exhaust duct 12, and when the outdoor wind is strong, the flow of air from the outside flows back through the exhaust duct 12, and the bathroom ventilation drying / heating apparatus 1A is transferred from the bathroom ventilation drying / heating apparatus 1A to the bathroom 100. It may be blown in. For this reason, ventilation air volume is set so that the flow of the air which flows backward from the outside can be suppressed.

  Here, the slight air volume, which is the ventilation air volume in the small air volume ventilation operation mode, is a so-called cold draft feeling that does not generate an air flow in the bathroom 100 that makes the bather feel cold when there is a person in the bathroom 100. It is set to the ventilation air volume that has no.

  Thus, the 2nd ventilation airflow which can suppress the flow of the air between the rooms connected via an air path and can suppress the backflow of the air to a room is called a fine airflow. The fine air volume in the fine air volume ventilation operation mode is set to be smaller than the constant ventilation air volume in the 24-hour ventilation operation mode.

  The control unit 6 executes or stops the fine air volume ventilation operation mode by a predetermined operation using the operation unit 7 or the like as a predetermined condition for executing the fine air volume ventilation operation mode. Further, the control unit 6 executes or stops the other operation mode such as the 24-hour ventilation operation mode by a predetermined operation at the operation unit 7 or the like, and the fine air volume ventilation is performed along with the execution or stop of the other operation mode. Run or stop operation mode.

  The control unit 6 has, as other operation modes, a heating operation mode for performing a heating operation, a ventilation operation mode for performing a ventilation operation, a drying operation mode for performing a drying operation, and a cool air operation mode for performing a cool air operation.

  In the control unit 6, the ventilation air volume in the ventilation operation mode is set to a strong ventilation air volume that is larger than the normal ventilation air volume in the 24-hour ventilation operation mode. Further, the fine air volume that is the ventilation air volume in the fine air volume ventilation operation mode is set to be smaller than the strong ventilation air volume in the ventilation operation mode.

In this example, the fine air volume that is the ventilation air volume in the fine air volume ventilation operation mode is set such that the ventilation air volume from the bathroom 100 is about ³ to 20 m ³ / h. Further, the constant ventilation air volume that is the ventilation air volume in the 24-hour ventilation operation mode is set such that the ventilation air volume from the bathroom 100 is about ³⁰ to 50 m ³ / h. Furthermore, the strong ventilation air volume that is the ventilation air volume in the ventilation operation mode with the ventilation of the bathroom 100, the drying operation mode, and the cool air operation mode is set to about 60 to 70 m ³ / h.

  Here, the fine air volume in the fine air volume ventilation operation mode may be changeable according to the size of the bathroom 100, the duct length, and the like. For example, the ventilation air volume in about three stages can be selected as the slight air volume in the low air volume ventilation operation mode, and can be set according to the size of the bathroom 100, the duct length, and the like.

  The control unit 6 performs an operation of stopping the 24-hour ventilation operation mode itself, an operation of starting the heating operation mode, etc. as control for linking execution or stop of the slight air volume ventilation operation mode with execution or stop of another operation mode. , Even if the 24-hour ventilation operation mode is stopped by a predetermined operation for stopping the 24-hour ventilation operation mode, the fine air volume ventilation operation mode is executed, so that instead of ventilation with the constant ventilation air volume, Control is performed to continue ventilation with a slight air volume.

  Moreover, the control part 6 ventilates with the ventilation air volume set according to the operation mode by the predetermined operation which starts 24 hour ventilation operation mode, ventilation operation mode, drying operation mode, or a cool wind operation mode, and a fine air volume ventilation Control to stop the operation mode is performed.

  FIG. 4 is a configuration diagram illustrating an example of the operation unit. The operation unit 7 selects, as an operation mode selection button, a 24-hour ventilation operation mode in which the bathroom 100 shown in FIG. 1 and the entire building (not shown) in which the bathroom 100 is installed are continuously ventilated with a predetermined ventilation airflow. An operation selection button 70 is provided.

  The operation unit 7 also includes a heating operation selection button 71 for selecting a heating operation mode, a ventilation operation selection button 72 for selecting a ventilation operation mode, a drying operation selection button 73 for selecting a drying operation mode, and a cool air operation mode. A cool wind operation selection button 74 is provided.

  Furthermore, the operation unit 7 includes a stop button 75 that stops operations other than the 24-hour ventilation operation mode.

  In addition, the operation unit 7 includes a status lamp 76 in order to visually recognize the operation mode being executed. The operation unit 7 includes a status lamp 76 corresponding to each operation button in order to make the operation mode selected by each operation mode selection button visible.

  Further, in this example, the operation unit 7 includes a status lamp 76a indicating that the slight air volume ventilation operation mode is being executed. Further, the operation unit 7 includes a display unit 77 for displaying a set value and the like at the current time and setting time.

  When the slight air volume ventilation operation mode is executed, the operation unit 7 turns on the status lamp 76a. The status lamp 76a may not be provided, and the status lamp 76 corresponding to another operation mode may be used to indicate that the slight air volume ventilation operation mode is being executed. For example, during the execution of the slight air volume ventilation operation mode, the display state is switched by, for example, blinking the status lamp 76 corresponding to the 24-hour ventilation operation mode to indicate that the slight air volume ventilation operation mode is being executed. Also good.

  In addition, it is not provided with a configuration for indicating that the slight air volume ventilation operation mode is being executed, and a notation that the ventilation operation is being performed even when the 24-hour ventilation operation mode is stopped is indicated by a predetermined wording or the like. 7 can be done with a sticker or the like to ventilate the attention to the user.

<Example of operation of bathroom ventilation drying / heating apparatus of this embodiment>
Below, with reference to each figure, the operation example of the bathroom ventilation drying heating apparatus of this Embodiment is demonstrated.

  FIG. 5 is a flowchart illustrating a first operation example in the slight air volume ventilation operation mode. FIG. 5 illustrates control for executing the slight air volume ventilation operation mode when the 24-hour ventilation operation mode is stopped.

  As shown in FIG. 1, the bathroom ventilation drying / heating apparatus 1A is installed in the bathroom 100, and when the installation of each duct, the installation of the operation unit 7 and the electrical work are completed, in step SA1 of FIG. The apparatus main body 10 is energized.

  When the 24-hour ventilation operation selection button 70 is pressed in the operation unit 7 shown in FIG. 4 as a predetermined operation in the operation unit 7 in which the 24-hour ventilation operation mode is selected in step SA2 of FIG. In step SA3 of FIG. 5, the 24-hour ventilation operation mode is executed, and the ventilation operation is performed with the constant ventilation air volume. That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 shown in FIG. 2 and the like so that the ventilation air volume is always obtained.

  As a predetermined condition for executing the slight air volume ventilation operation mode, the control unit 6 performs the operation at the operation unit 7 in which the stop of the 24-hour ventilation operation mode is selected in step SA4 of FIG. 5 during execution of the 24-hour ventilation operation mode. When a predetermined operation is performed, the slight air volume ventilation operation mode is executed in step SA5 of FIG.

  That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 shown in FIG. 2 or the like so as to obtain a slight air volume, and switches the ventilation air volume to the slight air volume to perform the ventilation operation.

  Further, in the configuration in which the operation unit 7 includes the status lamp 76a indicating that the slight air volume ventilation operation mode is being executed, the control unit 6 lights the status lamp 76a when executing the slight air volume ventilation operation mode. Notify the user that the ventilation operation continues even if the time ventilation operation mode is stopped. Thereby, even if the 24-hour ventilation operation mode is stopped, the ventilation operation with a slight air volume smaller than the normal ventilation air volume is continued.

  When the slight air volume ventilation operation mode is executed, the flow of air between the rooms connected via the air passage is suppressed, and the backflow of air to the room is suppressed, so even if the 24-hour ventilation operation mode is stopped For example, the odor generated in the toilet 103 is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  Moreover, it is suppressed that the moisture which generate | occur | produced in the bathroom 100 flows back through the sub suction duct 13, and it is prevented that dew condensation generate | occur | produces in the wash-dressing place 102 and the sub suction port grill 13a of the toilet 103.

  Furthermore, it is suppressed that the wind from the outside flows back through the exhaust duct 12, and the outside air is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  Since the ventilation air volume in the slight air volume ventilation operation mode is kept low compared to the ventilation air volume in the 24-hour ventilation operation mode, the rotation speed of the ventilation fan 2 can be suppressed, and compared with the 24-hour ventilation operation mode. Thus, the generation of sound in the ventilation fan 2 is suppressed, and power consumption can be suppressed even in continuous ventilation operation compared to the 24-hour ventilation operation mode. Further, the provision of the ventilation fan suction port 22b of the ventilation fan 2 on the upper surface of the ventilation fan case 22 can also suppress the leakage of sound to the outside.

  When a predetermined operation is performed in the operation unit 7 in which the 24-hour ventilation operation mode is selected in step SA2 in FIG. 5 during execution of the slight air volume ventilation operation mode, the control unit 6 in step SA3 in FIG. The 24-hour ventilation operation mode is executed, and the ventilation operation is performed by switching the fine air volume to the constant ventilation air volume. Thereby, the 24-hour ventilation operation mode can be resumed from the slight air volume ventilation operation mode.

  In addition, although FIG. 5 demonstrated the example which restarts 24 hour ventilation operation mode manually by operation with the operation part 7 after stopping 24 hour ventilation operation mode, in the structure which pauses 24 hour ventilation operation mode, After the 24-hour ventilation operation mode is stopped and the fine air volume ventilation operation mode is executed, the fine air volume ventilation operation mode may be stopped and the 24-hour ventilation operation mode may be restarted after a predetermined stop time has elapsed.

  In addition, as the predetermined operation for selecting the 24-hour ventilation operation mode, after another operation mode such as the heating operation mode is selected and the other operation mode is executed, the 24-hour ventilation operation mode is started. It may be the case. Further, when a predetermined operation is performed at the operation unit 7 in which the stop of the 24-hour ventilation operation mode is selected, the slight air volume ventilation operation mode is executed. In the operation, both the 24-hour ventilation operation mode and the slight air volume ventilation operation mode are executed. First, the 24-hour ventilation operation is performed with the constant ventilation air volume, and the predetermined operation for switching the actual operation, the passage of time, and the detection of the state For example, the air volume may be switched to a slight air volume.

  FIG. 6 is a flowchart illustrating a second operation example of the slight air volume ventilation operation mode. FIG. 6 illustrates control for executing the slight air volume ventilation operation mode by an operation of the operation unit 7 or the like.

  As shown in FIG. 1, the bathroom ventilation drying / heating apparatus 1A is installed in the bathroom 100, and when the installation of each duct, the installation of the operation unit 7 and the electrical work are completed, in step SB1 of FIG. The apparatus main body 10 is energized.

  As a predetermined condition for executing the slight air volume ventilation operation mode, the control unit 6 performs a predetermined operation in the operation unit 7 in which the slight air volume ventilation operation mode is selected in step SB2 of FIG. 6, for example, the operation unit illustrated in FIG. 7, or when a dedicated operation button for selecting the fine air volume ventilation operation mode is pressed, the fine air volume ventilation operation mode is executed in step SB3 of FIG. Ventilate operation by volume. That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 shown in FIG. 2 and the like so that a slight air volume can be obtained.

  When the slight air volume ventilation operation mode is executed, as described above, the air flow between the rooms connected via the air passage is suppressed, and the backflow of the air to the chamber is suppressed. For example, the odor generated in the toilet 103 is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  Moreover, it is suppressed that the moisture which generate | occur | produced in the bathroom 100 flows back through the sub suction duct 13, and it is prevented that dew condensation generate | occur | produces in the wash-dressing place 102 and the sub suction port grill 13a of the toilet 103.

  Furthermore, it is suppressed that the wind from the outside flows back through the exhaust duct 12, and the outside air is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  When a predetermined operation is performed in the operation unit 7 in which another operation mode is selected in step SB4 in FIG. 6 during execution of the slight air volume ventilation operation mode, the control unit 6 in step SB5 in FIG. Control is performed according to the selected operation mode. In the above description, the slight air volume ventilation operation mode is started by the operation of the operation unit 7, but an operation switch is provided on the front panel 11 or the like of the bathroom ventilation drying / heating apparatus 1A and the apparatus main body 10 side. You may enable it to start a fine air volume ventilation operation mode by operation.

  FIG. 7 is a flowchart illustrating a third operation example of the slight air volume ventilation operation mode. FIG. 7 illustrates control for executing the slight air volume ventilation operation mode when the power is turned on.

  As shown in FIG. 1, the bathroom ventilation drying / heating apparatus 1A is installed in the bathroom 100, and when the installation of each duct, the installation of the operation unit 7 and the electrical work are completed, in step SC1 of FIG. The apparatus main body 10 is energized.

  When detecting that the apparatus main body 10 is energized as a predetermined condition for executing the fine air volume ventilation operation mode, the control unit 6 executes the fine air volume ventilation operation mode in step SC2 of FIG. I do. That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 shown in FIG. 2 and the like so that a slight air volume can be obtained.

  By performing the slight air volume ventilation operation mode upon detection of power on, the back flow of air to the room is suppressed without performing the operation to execute the slight air volume ventilation operation mode or the 24-hour ventilation operation mode. Odor leakage, condensation, and outside air leakage are prevented.

  When a predetermined operation is performed in the operation unit 7 in which another operation mode is selected in step SC3 in FIG. 7 during execution of the slight air volume ventilation operation mode, the control unit 6 in step SC4 in FIG. Control is performed according to the selected operation mode. In the above description, the slight air volume ventilation operation mode is started immediately after the power is turned on when the energization is detected. However, when the energization is detected, the slight air volume ventilation operation mode is started after a predetermined waiting time has elapsed. You may be able to do it.

  FIG. 8 is a flowchart showing a fourth operation example of the slight air volume ventilation operation mode. FIG. 8 shows control for executing the slight air volume ventilation operation mode in conjunction with the heating operation mode during execution of the 24-hour ventilation operation mode. explain.

  The control unit 6 performs heating operation in step SD2 in FIG. 8 as a predetermined condition for executing the slight air volume ventilation operation mode while the 24-hour ventilation operation mode is being executed in step SD1 in FIG. When the heating operation selection button 71 is pressed in the operation unit 7 shown in FIG. 4 as a predetermined operation in the operation unit 7 in which the mode is selected, the heating operation mode is executed in step SD3 in FIG. The operation mode is stopped and the slight air volume ventilation operation mode is executed.

  That is, the controller 6 drives the circulation fan 3 with the circulation fan motor 31 and energizes the heater 4 to blow out hot air while circulating the air in the bathroom 100. Moreover, the control part 6 drives the ventilation fan 2 with the ventilation fan motor 21 so that a fine air volume can be obtained, and performs ventilation operation by switching the normal ventilation air volume to the fine air volume.

  When the slight air volume ventilation operation mode is executed in the heating operation mode, the air flow between the rooms connected via the air passage is suppressed, and the backflow of the air to the room is suppressed. For example, the odor generated in the toilet 103 is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  Moreover, it is suppressed that the moisture which generate | occur | produced in the bathroom 100 flows back through the sub suction duct 13, and it is prevented that dew condensation generate | occur | produces in the wash-dressing place 102 and the sub suction port grill 13a of the toilet 103.

  Furthermore, it is suppressed that the wind from the outside flows back through the exhaust duct 12, and the outside air is prevented from leaking into the bathroom 100 from the inlet grill 11a of the bathroom ventilation drying / heating apparatus 1A.

  Here, as described above, in addition to being able to suppress the backflow of air into the room, the slight air volume, which is the ventilation air volume in the slight air volume ventilation operation mode, can be used when the bather has a person in the bathroom 100. The ventilation airflow is set so that there is no cold draft feeling in the bathroom 100 where no air flow that feels cold is generated in the bathroom 100. Thereby, even if the slight air volume ventilation operation mode is executed in the heating operation mode, the bather is prevented from feeling cold due to ventilation.

  When the heating operation mode is executed in step SD4 in FIG. 8 and a predetermined heating operation time has elapsed, the control unit 6 stops the heating operation mode and the slight air volume ventilation operation mode in step SD5 in FIG. Resume ventilation mode.

  That is, the control unit 6 stops the driving of the circulation fan motor 31 and the heater 4 and drives the ventilation fan 2 with the ventilation fan motor 21 so that the constant air volume is obtained, thereby switching the fine air volume to the constant ventilation air volume. Ventilate operation. Thereby, 24-hour ventilation operation mode can be restarted from heating operation mode.

  In the heating operation mode, the bather may feel cold because the wind blows even if the blown air is hot air. For this reason, heating operation mode called the preheating operation mode etc. which heat the bathroom 100 before bathing and stop heating operation during bathing is also executable.

  In such a heating operation mode, the heating operation mode is executed and the heating operation is started and the 24-hour ventilation operation mode is stopped by a predetermined operation at the operation unit 7 in which the heating operation mode is selected. Perform volume ventilation mode. When the heating operation mode is executed and a predetermined preliminary heating operation time elapses, the heating operation in the heating operation mode is stopped and the slight air volume ventilation operation mode is continued.

  When the heating operation in the heating operation mode is stopped and a predetermined minute air volume ventilation operation time elapses, the minute air volume ventilation operation mode is stopped and the 24-hour ventilation operation mode is restarted. Thereby, during bathing, the slight air volume ventilation operation mode is continued, and the backflow of air to the room such as leakage of odor is suppressed without the bather feeling cold. Note that after the heating operation mode is executed and the 24-hour ventilation operation mode is stopped, the minute air volume ventilation operation mode may be executed after a predetermined waiting time has elapsed. Further, after the preliminary heating operation time has elapsed, the slight air volume ventilation operation mode may be executed.

  Furthermore, a heating operation mode called a heating operation mode during bathing in which the heating operation is performed by reducing the amount of warm air during bathing can be executed.

  In such a heating operation mode, a predetermined operation at the operation unit 7 in which the heating operation mode is selected, the heating operation mode is executed by setting the air volume at the circulation fan 3 as a predetermined strong air volume, and the heating operation is started. The 24-hour ventilation operation mode is stopped, and the slight air volume ventilation operation mode is executed. When the heating operation mode is executed and a predetermined preliminary heating operation time elapses, the air volume in the circulation fan 3 is switched to a predetermined weak air volume that is weaker than the strong air volume, and the heating operation is continued, and the slight air volume ventilation operation mode is continued. .

  When a predetermined heating operation time during bathing elapses, the heating operation mode and the slight air volume ventilation operation mode are stopped, and the 24-hour ventilation operation mode is restarted. Thereby, during bathing, the slight air volume ventilation operation mode is continued, and the backflow of air to the room such as leakage of odor is suppressed without the bather feeling cold. Note that after the heating operation mode is executed and the 24-hour ventilation operation mode is stopped, the minute air volume ventilation operation mode may be executed after a predetermined waiting time has elapsed. Further, after the preliminary heating operation time has elapsed, the slight air volume ventilation operation mode may be executed.

  FIG. 9 is a flowchart showing a fifth operation example of the slight air volume ventilation operation mode. FIG. 9 shows control for executing the slight air volume ventilation operation mode in conjunction with the heating operation mode while the 24-hour ventilation operation mode is stopped. explain.

  In this example, as described in FIG. 5 and the like, the slight air volume ventilation operation mode is executed while the 24-hour ventilation operation mode is stopped, and the heating operation mode is changed while the 24-hour ventilation operation mode is stopped. When selected, the slight air volume ventilation operation mode is continued and the heating operation mode is executed.

  That is, the control unit 6 performs the predetermined operation at the operation unit 7 in which the heating operation mode is selected in Step SE2 of FIG. 9 while the slight air volume ventilation operation mode is executed in Step SE1 of FIG. When the operation is performed, the heating operation mode is executed in step SE3 of FIG. 9, and the slight air volume ventilation operation mode is continued.

  When the heating operation mode is executed in step SE4 in FIG. 9 and a predetermined heating operation time has elapsed, the control unit 6 stops the heating operation mode in step SE5 in FIG. 9 and continues the slight air volume ventilation operation. Thus, even if the 24-hour ventilation operation mode is stopped, the slight air volume ventilation operation mode is continued, and the backflow of air to the room such as leakage of odor is suppressed without the bather feeling cold. In addition, after stopping heating operation mode, you may make it transfer to 24 hour ventilation operation mode from slight air volume ventilation operation mode.

  FIG. 10 is a flowchart showing a sixth operation example of the slight air volume ventilation operation mode. In FIG. 10, another operation mode with ventilation during the stop of the 24-hour ventilation operation mode, in this example, the ventilation operation mode is executed. Control will be described.

  As described with reference to FIG. 5, when the 24-hour ventilation operation mode is stopped, the slight air volume ventilation operation mode is executed. The control unit 6 performs a predetermined operation on the operation unit 7 in which the ventilation operation mode is selected in step SF2 in FIG. 10 while the slight air volume ventilation operation mode is being executed in step SF1 in FIG. When the ventilation operation selection button 72 is pressed on the operation unit 7 shown in FIG. 4, the ventilation operation mode is executed in step SF3 of FIG. 10, and the slight air volume ventilation operation mode is stopped.

  That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 so as to obtain a strong ventilation air volume, and performs a ventilation operation by switching the slight air volume to the strong air volume.

  When the ventilation operation mode is executed in step SF4 in FIG. 10 and a predetermined heating operation time has elapsed as a predetermined condition for executing the slight air volume ventilation operation mode, the control unit 6 sets the ventilation operation mode in step SF5 in FIG. At the same time, the mode of fine air flow ventilation is resumed.

  That is, the control unit 6 drives the ventilation fan 2 with the ventilation fan motor 21 so as to obtain a fine air volume, and performs a ventilation operation by switching the strong ventilation air volume to the fine air volume. Thereby, the slight air volume ventilation operation mode can be resumed from the ventilation operation mode.

  Here, the control for executing the dry operation mode or the cool air operation mode while the 24-hour ventilation operation mode is stopped is the same. In addition, after the drying operation mode or the like is stopped, the mode may be changed from the slight air volume ventilation operation mode to the 24-hour ventilation operation mode.

<Modification of Bathroom Ventilation Drying and Heating Device of this Embodiment>
FIG. 11 is a block diagram showing a modification of the control function of the bathroom ventilation drying / heating apparatus of the present embodiment. The control unit 6 executes or stops the low air volume ventilation operation mode as a predetermined condition for executing the low air volume ventilation operation mode in accordance with detection of preset conditions in the bathroom 100, the washroom 102, and the toilet 103. You may do it.

  When detecting a person entering the bathroom 100 as a predetermined condition for executing the slight air volume ventilation operation mode, the control unit 6 executes the slight air volume ventilation operation mode. In order to detect a person entering the bathroom 100, for example, the bathroom 100 shown in FIG. When the controller 6 detects the person entering the bathroom 100 from the output signal of the human sensor 80 and determines that there is a person in the bathroom 100, the controller 6 executes the slight air volume ventilation operation mode.

  Or the operation detection sensor 81 which detects operation of the lighting switch which the bathroom 100 does not illustrate as a state detection means is provided. When it is detected from the output signal of the operation detection sensor 81 that the lighting of the bathroom 100 is turned on, the control unit 6 determines that there is a person in the bathroom 100 and executes the slight air volume ventilation operation mode.

  If the control unit 6 determines from the output signal of the human sensor 80 or the operation detection sensor 81 that the person has left the bathroom 100, the control unit 6 stops the slight air volume ventilation operation mode. If it is determined that a person has entered the bathroom 100, the slight air volume ventilation operation mode may be executed after a predetermined waiting time has elapsed.

  When it is determined that a person has left the bathroom 100, the air flow may be stopped after the mode of the fine air volume ventilation operation for a certain period of time. Or until another operation mode is executed.

  Furthermore, as a predetermined condition for performing a slight air volume ventilation operation mode, a human sensor is provided in another room such as the washroom 102 or the toilet 103, or an operation detection sensor for detecting an operation of a lighting switch in the other room is provided. When a person entering the other room is detected, the slight air volume ventilation operation mode may be executed.

  When the odor in the toilet 103 is detected as a predetermined condition for executing the slight air volume ventilation operation mode, the control unit 6 executes the slight air volume ventilation operation mode. In order to detect the odor in the toilet 103, for example, the toilet 103 shown in FIG. When the controller 6 detects the generation of odor in the toilet 103 from the output signal of the odor sensor 82 and determines that the odor in the toilet 103 has reached a predetermined value, the controller 6 executes the slight air volume ventilation operation mode.

  When the control unit 6 determines from the output signal of the odor sensor 82 that the odor in the toilet 103 has fallen below a predetermined value, the control unit 6 stops the slight air volume ventilation operation mode. If it is determined that the odor in the toilet 103 has fallen below a predetermined value, the slight air volume ventilation operation mode may be stopped for a certain period of time, or the fine air volume ventilation operation mode may be stopped. Or until another operation mode is executed.

  Further, the odor sensor 82 may be provided in an air passage such as the auxiliary suction duct 13 shown in FIG. 1 or the other-chamber suction air passage 24 shown in FIG.

  The control unit 6 detects humidity in the bathroom 100 or the like as a predetermined condition for executing the slight air volume ventilation operation mode, and executes the slight air volume ventilation operation mode. In order to detect the humidity in the bathroom 100 or the like, for example, the bathroom 100 includes a humidity sensor 83 as a state detection unit. When the controller 6 detects the humidity in the bathroom 100 from the output signal of the humidity sensor 83 and determines that the humidity in the bathroom 100 has reached a predetermined value, the controller 6 executes the slight air volume ventilation operation mode.

  When the control unit 6 determines from the output signal of the humidity sensor 83 that the humidity in the bathroom 100 has fallen below a predetermined value, the control unit 6 stops the slight air volume ventilation operation mode. If it is determined that the humidity in the bathroom 100 has fallen below a predetermined value, the low air volume ventilation operation mode may be stopped for a certain period of time, or the fine air volume ventilation operation mode may be stopped. Or until another operation mode is executed.

  Further, the humidity sensor 83 may be provided in each air passage in the apparatus main body 10 shown in FIG. 2 and in the air passage such as the sub suction duct 13 shown in FIG. You may prepare in other rooms, such as the place 102 and the toilet 103. FIG.

  The control unit 6 detects the flow of air from the outside as a predetermined condition for executing the fine air volume ventilation operation mode, and executes the fine air volume ventilation operation mode. In order to detect the flow of air from the outside, for example, the exhaust duct 12 or the outdoor grill 12a is provided with a wind speed sensor 84 as a state detection means. When the controller 6 detects the flow of air from the outside from the output signal of the wind speed sensor 84 and determines that the flow of air from the outside has reached a predetermined value, the controller 6 executes the fine air volume ventilation operation mode.

  When the control unit 6 determines from the output signal of the wind speed sensor 84 that the flow of air from the outside has fallen below a predetermined value, the control unit 6 stops the slight air volume ventilation operation mode. If it is determined that the external air flow has fallen below the predetermined value, it may be stopped after the slight air volume ventilation operation mode for a certain period of time, or the fine air volume ventilation operation mode is stopped. May be continued until an operation is performed or until another operation mode is executed. In addition to the wind speed sensor, a wind pressure sensor and an air volume sensor may be provided as outside air detection means for detecting the flow of air from the outside.

  By executing the fine air volume ventilation operation mode by detecting the predetermined state, the execution time of the fine air volume ventilation operation mode is reduced, and power consumption can be suppressed. Moreover, the generation of sound can be suppressed. Here, 1 A of bathroom ventilation drying heating apparatuses are good to provide either the state detection means mentioned above, or the state detection means in combination.

  As described above, in the bathroom ventilation drying / heating apparatus 1A according to the present embodiment, the user can select not to perform ventilation, such as an operation for stopping the 24-hour ventilation operation mode, by providing the slight air volume ventilation operation mode. Even if it is made, the backflow of the air to the room is suppressed by executing the slight air volume ventilation operation mode, and the leakage of odor, the occurrence of condensation, the leakage of outside air, and the like are prevented.

  For this reason, even if the auxiliary suction duct joint 51 is not equipped with a damper, the odor leaks from the toilet 103 to the bathroom 100, and the washroom 102 and the auxiliary inlet grill 13a in the toilet 103 accompanying the increase in the humidity of the bathroom 100. The occurrence of condensation can be suppressed.

  Moreover, even if the exhaust duct joint 50 is not provided with a damper, leakage of outside air to the bathroom 100 can be suppressed. Thus, since it can be set as the structure which does not provide a damper in each duct joint, ventilation resistance can be reduced because a damper does not exist in an air passage. By eliminating the damper that causes the ventilation resistance, if the same performance as before is obtained, the number of rotations of the ventilation fan 2 can be reduced, and noise can be reduced. Further, since the damper is not necessary, the cost can be reduced by reducing the number of parts.

  However, it is good also as a structure provided with a damper in each duct joint. By providing the slight air volume ventilation operation mode, the airtightness required for the damper can be lowered, and an airtight holding member such as a packing can be omitted. Thereby, even if it has a damper, the number of parts can be reduced and cost reduction can be aimed at. Further, by omitting the airtight holding member, it is possible to suppress the occurrence of collision noise between the packings when the damper is opened and closed. And it is the structure provided with the fine air volume ventilation operation mode, and can further suppress backflow of air more reliably by providing a damper. Furthermore, by providing a damper, it is also possible to configure a detection means for detecting the air flow using angle information or the like when the damper rotates with the air flow from the outside.

  Although it is possible to suppress odor leakage by providing a manual opening / closing shutter in the auxiliary inlet grill 13a or the like, the user has to open and close the shutter, which takes time and effort. In addition, by providing a filter that absorbs odors in the air passage or the like, leakage of odors can be suppressed, but separate parts are required, leading to an increase in cost. Similarly, by providing a moisture absorption filter in the air passage or the like, the occurrence of condensation can be suppressed, but a separate part is required, leading to an increase in cost. In addition, it is conceivable to provide an aroma function in the air volume of the auxiliary inlet grill 13a and the like and replace the odor with another odor, but the odor itself cannot be reduced and the increase in humidity cannot be suppressed. . In the present embodiment, by executing the operation mode in which the ventilation airflow is adjusted, the backflow of air is suppressed, so that the user's trouble can be saved and the increase in cost can be suppressed.

When the slight air volume ventilation operation mode was executed, it was confirmed whether moisture would flow into the bathroom undressing room, which is another room. In this example, the fine air volume, which is the ventilation air volume in the fine air volume ventilation operation mode, is set to 7 m ³ / h from the bathroom 100.

  In the example in which the slight air volume ventilation operation mode was executed, an increase in humidity was suppressed even after a predetermined time had elapsed, and no condensation was observed. On the other hand, in the comparative example in which the slight air volume ventilation operation mode is not executed, the humidity in the duct increased immediately after the start of watering, and the humidity in the washroom 102 increased with the passage of time. In addition, the occurrence of condensation was observed.

Here, even if the ventilation air volume was lowered to about 3 m ³ / h, the increase in humidity was suppressed and no condensation was observed. Even if the ventilation air volume is increased to about 20 m ³ / h, when there are people in the bathroom 100, the air flow that makes the bather feel cold is not generated in the bathroom 100, and the driving sound is kept low. It was.

From the above results, when the ventilation air flow from the bathroom 100 is executed in the slight air volume ventilation operation mode with a slight air volume of about ³ to 20 m ³ / h, the washroom is a separate room connected to the bathroom 100 in the duct and the duct. Both 102 were found to be able to maintain the same humidity as the surroundings.

  The present invention is applied to a ventilator that can ventilate one room and another room.

  DESCRIPTION OF SYMBOLS 1A ... Bathroom ventilation drying heating apparatus, 10 ... Apparatus main body, 11 ... Front panel, 11a ... Suction grill, 11b ... Outlet grill, 12 ... Exhaust duct, 12a ... -Outdoor grill, 13 ... Sub-intake duct, 13a ... Sub-inlet grill, 2 ... Ventilation fan, 20 ... Impeller, 21 ... Ventilation fan motor, 22 ... Ventilation fan case 22a: Ventilation fan outlet, 22b: Ventilation fan inlet, 22c: Ventilation inlet, 22d: Sub inlet, 22e: Exhaust outlet, 23: Bathroom inlet Air path, 24 ... Other room suction air path, 3 ... Circulating fan, 30 ... Impeller, 31 ... Circulating fan motor, 32 ... Circulating fan case, 32a ... Circulating fan blowout Air path, 32b ... Circulating fan inlet, 32c Circulation fan outlet, 4 ... heater, 5 ... metal case, 50 ... exhaust duct joint, 51 ... sub-intake duct joint, 6 ... control unit, 7 ... operation unit, 70 ... 24-hour ventilation operation selection button, 71 ... heating operation selection button, 72 ... ventilation operation selection button, 73 ... drying operation selection button, 74 ... cool air operation selection button, 75 -Stop button, 76 ... Status lamp, 77 ... Display, 100 ... Bathroom, 100a ... Ceiling, 101 ... Outer wall, 102 ... Washroom, 102a ... Ceiling, 103 ... Toilet, 103a ... Ceiling

Claims (3)

A blowing means for sucking air in one room and air in another room and exhausting the air to the outside;
Control means for suppressing the flow of air from one room to the other room and the flow of air from the other room to the one room by blowing by the blowing means;
The control means includes
A first ventilation operation mode for performing ventilation operation of the entire building including one room and another room with a first ventilation airflow;
A second ventilation operation mode that suppresses the flow of air from one room to the other room and the flow of air from the other room to the one room with a second ventilation air volume set to be less than the first ventilation air volume; Have
The ventilator characterized in that the second ventilation operation mode can be executed even if the first ventilation operation mode is stopped. The first ventilation operation mode is a 24-hour ventilation operation mode that is set to an air volume that performs continuous or intermittent continuous ventilation and replaces the air in the entire building including one room and other rooms in a predetermined time. The ventilator according to claim 1. The ventilation device according to claim 1 or 2, wherein the control unit performs a ventilation operation with the second ventilation air volume when a predetermined condition for executing the second ventilation operation mode is reached.

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