JPH0363436A - Automatic ventilation fan - Google Patents

Abstract

PURPOSE:To always ventilate without labor when a ventilation is required and to eliminate unpleasant feeling at a person by receiving a dew-condensation signal from a dew-condensation detector by ventilation rate determining means, and determining the rate as a weal rate when a human body detection signal is received from a human body detector. CONSTITUTION:When humidity in a bathroom rises due to bathing, etc., a dew- condensation sensor 9 aligned on a louver 4 is dew-condensed to judge the dew-condensation. Then, whether there is a person to take a bath in the bathroom or not is judged by a detection signal from a human body detector 6. If there is a person to take a bath, only a triac 19 is conducted through a transistor 21 according to the set content of a microcomputer 14, and a fan motor 2 is weakly operated. If there is no person to take a bath, only a triac 18 is conducted through a transistor 20, and the motor 2 is strongly operated. When bathing is subsequently conducted, it is rapidly switched to the weak operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ventilation fan installed to remove moisture from a bathroom.

Conventional Technology Conventionally, many ventilation fans installed in bathrooms operated automatically in order to quickly and efficiently exhaust moisture.

For this reason, conventional automatic ventilation fans, for example,
It was configured as shown in the figure. That is, a power supply circuit 100 is configured in which a ventilation fan motor 101 is connected to a power supply 102 via a manual switch 103 and a detection circuit 106 including a dew condensation sensor 104.
3, the dew condensation sensor 10 detects the condensation condition in the bathroom.
4, and the detection circuit 102 opens and closes the power supply circuit 100 in response to the output signal.

Problems to be Solved by the Invention In such a conventional configuration, when the bathroom is humid during bathing or the like, dew condensation occurs on the dew condensation sensor 104, and in response to the output signal, the detection circuit 105 opens the power supply circuit 100. However, at this time, that is, while taking a bath, the manual switch 103
If it is turned on, the fan motor 101 will automatically operate to provide ventilation, and outside air will enter through the door louvers and the gaps around the door while taking a bath, making you feel cold and uncomfortable. . Therefore, when taking a bath, use manual switch 1.
Turn off 03 and turn on manual switch 103 after bathing.
The fan motor 101 is automatically operated in the case where the bathroom is dried, and this operation is necessary every time when taking a bath, so it is not completely automated and the operation is troublesome.

In addition, while it was common practice not to ventilate while taking a bath, in recent years, frequent showers and other showers tend to generate steam, and condensation due to steam leaking into sanitary spaces including washrooms and its harmful effects can no longer be ignored. It's starting to disappear, and it's becoming necessary to ventilate even while taking a bath.

The present invention is intended to solve these problems, and aims to automatically ventilate the room whenever ventilation is required, without any effort, and without causing discomfort to people.

Means for Solving the Problems In order to solve the problems, the present invention includes a main body having a built-in ventilation fan motor, and a main body equipped with a suction port of the main body.
A louver having a dew condensation detector and a human body detector on its surface, a ventilation air volume determining means for determining a ventilation air volume using detection signals of the dew condensation detector and the human body detector as input signals, and the ventilation air volume determining means. and a fan motor driving means for driving the fan motor in accordance with a control signal of the ventilation air flow rate determining means, when receiving a dew condensation signal from a dew condensation detector and a human body detection signal from a human body detector, the ventilation air volume determining means determines the ventilation air volume. This is an automatic ventilation fan that is configured to determine a low air volume.

According to this configuration, while taking a bath, the dew condensation detector outputs a signal indicating that there is condensation in the bathroom, and the human body detector outputs a signal indicating that a bather is present, and the ventilation air volume determining means receives these signals. The ventilation air volume is determined to be a weak air volume, and the fan motor drive means receives a control signal from the ventilation air volume determining means to operate the fan motor so that the bather does not feel uncomfortable and prevents steam leakage to other rooms. Operate at a moderately low air volume. When the presence of a human body is no longer detected, the system automatically switches to strong operation that provides sufficient ventilation air volume.

EXAMPLE OF EXPOSURE Hereinafter, one embodiment of the present invention will be explained based on FIGS. 1 to 3.

In Fig. 1, a box-shaped main body 1 installed embedded in the ceiling 23 of a bathroom has a built-in fan motor 2, and an adapter 3 for connecting a duct communicating with the outdoors is attached to a side opening. ing. In addition, a louver 4 is attached to the main body 1 by pressing a button on the suction port 1a that is open at the bottom.
A dew condensation detector 6 and a human body detector 6 are arranged side by side on the central surface of the sensor. The detection signal of the dew condensation detector 6 and the detection signal of the human body detector 6 are both input signals to the ventilation airflow rate determination means 7, and the ventilation airflow rate determination means 7 outputs a control signal based on this input signal to control the Upon receiving the signal, the fan motor driving means 8 controls the operation of the fan motor 2.

Next, as shown in FIG. 2, the dew condensation detector 5 is
The human body detector 6 includes a pyroelectric infrared sensor 11, an amplifier circuit 12, and a comparison circuit 13. The dew condensation detector 6 and the human body detector 6 are connected to the ventilation airflow rate determining means 7 and the input section of the microcomputer 140, respectively. The detection signals from the dew condensation detector 6 and the human body detector 6 are read into the microcomputer 14 as either ON or OFF signals.

On the other hand, a triac 18 is connected to the strong operation terminal (points A and B in Figure 3) of the fan motor 2, and a triac 19 is connected to the weak operation terminal (point A and 0 in Figure 3), and the AC power supply is connected to each. It forms a series circuit with 16. triac 1
Transistors 20 and 21 are connected to each gate of transistors 8 and 19 via a DC power supply 22, so that a gate current flows therethrough. These triac 18 y 19 s
Transistor 20.21 to fan motor drive means 8
I am doing this. The operation control signal for the fan motor 2 from the output section of the microcomputer 14 operates one of the transistors 20 and 21, and the DC power supply 22
A gate current is caused to flow to make one of the triacs 18 and 19 conductive.

That is, depending on the detection signals from the dew condensation detector 6 and the human body detector 6, the fan motor 2 is operated in "strong operation" when the triac 18 is on, "weak operation" when the triac 19 is on, and "weak operation" when the triac 18 and 194 are not on. It is configured to operate in three types of modes: ``stop'' and ``stop''.

Furthermore, the operation of the automatic ventilation fan configured as described above is
This will be explained based on the flowchart shown in the figure.

When the humidity in the bathroom increases due to bathing, etc., the louver 4
The dew condensation sensor 9 arranged in parallel on the surface of the
It is determined that there is condensation. Subsequently, in step 32, it is determined whether or not there is a bather in the bathroom based on the detection signal from the human body detector 6. If there is a person taking a bath, the process moves to step 33, where only the triac 19 is made conductive via the transistor 21 according to the settings of the microcomputer 14, and the fan motor 2 is operated at a low speed. If there are no more bathers, the process moves to step 34 based on the determination in step 32, where only the triac 18 is made conductive via the transistor 20, and the fan motor 2 is operated at high speed.

In addition, if the user continues to take a bath, the judgment in step 32 will immediately switch to the weak operation in step 31.

Then, when there are no more bathers and the bathroom is dry due to continuous operation in step 340, the process moves to step 35 based on the judgment in step 31 that the condensation has disappeared, and both triacs 18 and 19 are made non-conductive. motor 2
automatically stop.

As described above, according to the embodiment, there is no need to carefully operate the manual switch, the operation is performed at low speed during bathing, the bather does not feel cold, steam leakage to the outside is prevented, and there are no bathers. It automatically switches to high-speed operation and automatically stops when the bathroom is dry, so you can use it without any hassle.
This allows for efficient ventilation and drying of the bathroom.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the state of condensation in the bathroom and the presence or absence of a bather are detected, and the operating capacity of the ventilation fan is automatically switched. It does not require switching operations during or before and after bathing, does not cause discomfort to bathers, and has a great effect on ventilation and drying of the entire bathroom, including the sanitary space around the bathroom. It is.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an automatic ventilation fan according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of the automatic ventilation fan, FIG. 3 is a flowchart showing automatic operation of the automatic ventilation fan, and FIG. 4 is a configuration diagram of a conventional automatic ventilation fan. 1...Main body, 2...Mountain/fan motor, 4...
... Louver, 6 ... Condensation detector, 6 ...
...Human body detector, 7...Ventilation air volume determining means,
8...Fan motor drive means.

Claims (1)

[Claims] A main body with a built-in fan motor for ventilation, a louver attached to the suction port of the main body and equipped with a dew condensation detector and a human body detector on its surface, and a louver that receives detection signals from each of the dew condensation detector and human body detector. It consists of a ventilation air volume determining means that determines the ventilation air volume as an input signal, and a fan motor drive means that drives the fan motor in response to a control signal from the ventilation air volume determining means, and the ventilation air volume determining means detects condensation from a condensation detector. An automatic ventilation fan configured to receive a signal and determine a ventilation air volume to be a low air volume when a human body detection signal is received.