JP3361242B2 - Toilet ventilation fan - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet ventilation fan for automatically controlling lighting and ventilation fan in a toilet room.

[0002]

2. Description of the Related Art A ventilation fan used in a toilet sometimes operates more than necessary because the lighting and the ventilation fan in the toilet forget to turn off the power. Therefore, there has been a demand for a toilet ventilation fan that can be controlled to turn on and off the lighting and the ventilation fan in conjunction with opening and closing the toilet door.

Conventionally, Japanese Patent Publication No. 6-37996 has been disclosed as an example of this type of ventilation fan. The configuration will be described below with reference to FIG.

As shown in the figure, a door opening / closing detector 101
And a human body detection sensor 103 for detecting the presence or absence of an occupant,
It has an illuminance sensor 102 that detects the brightness of the room, a counter that measures the entry time of an occupant, and a memory that stores a reference value of the entry time. When the illuminance sensor 102 detects that the inside of the toilet is dark, the lighting device is turned on, and when the human body detection sensor 103 detects the presence of an occupant, the ventilation fan is operated to counter the entry time of the occupant. By comparing the measured value by and the reference value of the entry time, it is determined whether the urine is urine or urine.
The operation of the ventilation fan is continued for a shorter time than the above-mentioned fixed time after leaving the room, and the reference value of the entry time is each time by the average value obtained from the measured value of the counter and the reference value of the entry time stored in the memory. It had a controller that was newly set and re-stored in memory.

[0005]

In such a conventional toilet ventilation fan, the ventilation fan is operated for a certain period of time after a person leaves the toilet depending on whether the illuminance sensor 102 is bright or dark. However, there is a problem in that the driving time cannot be controlled, and when it is determined to be night, the driving time cannot be shortened to reduce noise.

Further, since it is not possible to control the operation of the ventilation fan by distinguishing between summer and winter, there is a problem that the ventilation fan is operated at low temperatures in winter and feels cold air.

Further, the operation of the ventilation fan is performed by the human body detection sensor 1
Since it is performed only by the signal of 03, there is a problem that the ventilation fan cannot be operated by opening and closing the door, the detection range is limited, and it may not operate.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a toilet ventilation fan capable of reducing the noise caused by operating the ventilation fan at night.

A second object of the present invention is to provide a toilet ventilation fan that can be operated effectively so as to exhaust warm air in the room in summer and to prevent people from feeling cold air in ventilation in winter.

A third object of the present invention is to provide a toilet ventilation fan in which a human body detection sensor detects an occupant when the door open / close detector does not operate even if a person has entered the occupant room, and can reliably detect the occupant. To provide.

[0011]

In the toilet ventilation fan of the present invention, a door open / close detector for detecting that a person has opened the toilet door and entered the room, and an illuminance sensor for detecting the brightness in the toilet. , An illuminator for lighting the toilet,
A control circuit for controlling the operation of the ventilation fan for lighting the illuminator and for ventilating the inside of the toilet is provided, and the door opening / closing detector detects that the door has opened and a person has entered, and the ventilation fan is turned on. When the illuminance sensor determines that the toilet is bright and it is daytime, the illuminator is not turned on and the ventilation fan is operated for a certain period of time after a person leaves the room and closes the door. When it is determined to be night, the illuminator is turned on, the ventilation fan is operated, and after the person leaves the room and closes the door, the ventilation fan is operated for a time shorter than the predetermined time.

According to the present invention, it is possible to provide a toilet ventilation fan that reduces noise caused by operating the ventilation fan at night.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
A door open / close detector that detects that a person has opened the toilet door and entered the room, a human body detection sensor that detects the presence or absence of an occupant, and an illuminance sensor that detects the brightness inside the toilet.
A temperature sensor that detects the temperature inside the toilet, an illuminator that illuminates the inside of the toilet, and a control circuit that controls the operation of the ventilation fan that lights this illuminator and ventilates the inside of the toilet, and detects whether the door is open or closed. When the luminaire detects that a person has entered the room with the door open and operates the ventilation fan, and the illuminance sensor determines that the toilet is bright and it is daytime, the illuminator is not turned on and the person leaves the room and closes the door. Also, when the illuminance sensor determines that the toilet is dark at night, the illuminator is turned on and the ventilation fan is operated, and after the person leaves the room and closes the door, Even if a person enters the room and the illuminance sensor determines that it is daytime, the ventilation fan is operated for a certain period of time after leaving the room, and when it is determined that it is night, the ventilation fan It has the effect of being able to become be operated shorter than said predetermined time, to reduce noise caused by nocturnal ventilation fan operation.

FIG. 1 shows an embodiment of the present invention.
-It demonstrates, referring FIG. (Embodiment 1) As shown in the drawing, a main body 1 of a ventilation fan is formed of a main body frame 2 and a main body cover 3, and the main body frame 2 is provided with a ventilation fan 5 for ventilating a toilet 4 by a fan motor and Illuminator 6 for performing illumination, ventilation fan 5 and illuminator 6
Is provided with a control circuit 7 for automatically operating the human body detection sensor 8 for detecting the presence / absence of an occupant, an illuminance sensor 9 for detecting the brightness inside the toilet 4, and a temperature inside the toilet 4. A temperature sensor 10 for detecting and a detection signal of a door opening / closing detector (not shown) provided for detecting opening / closing of the door of the toilet 4 are provided so that the detection signal is input, and a person uses the volume to set a reference temperature to a predetermined value. A temperature setting knob 11 for setting is set.

The main body cover 3 has a suction port 12, an opening 13 through which each sensor can detect the condition inside the toilet 4, a through hole 14 of the temperature setting knob 11, and an illuminator cover 15.
Is attached to the wall portion 16 of the toilet 4, and the outdoor hood 17 is provided outside the room.

The operation of the toilet ventilation fan having the above structure will be described with reference to a flowchart.

The execution of the program is started from the start of the main routine shown in FIG. 3, and the illuminator 6 and the ventilation fan 5 are made inoperative as an initial state. The door closed,
When there is no person in the room, the program continues to sequentially execute the door opening / closing judgment, the existence of a person, and the start routine. When the door is opened, it is considered that a person has entered the room, and the entrance time measurement is started. Next, the brightness is judged based on the signal from the illuminance sensor 9, and if it is dark, the illuminator 6 is turned on. If it is bright, the temperature inside the room is detected by the temperature sensor 10 and the temperature set by the temperature setting knob 11 is used. If it is larger, the ventilation fan 5 is activated, and if it is smaller, the ventilation fan 5 is not activated. In this state, if the time measured from the start of the entrance time measurement is larger than the reference time stored in advance in the memory, the illuminator 6 and the ventilation fan 5
Stop the operation of and return to the start. If it is smaller, touch the handle on the outside door and wait until the door is closed. When the door is closed, the entry time measurement is stopped by jumping to (1) in the flowchart of FIG. Next, when the brightness is determined based on the signal from the illuminance sensor 9 and it is determined to be bright (YES in the flowchart), the illuminator 6 is turned off because the person is already absent, and the ventilation fan 5 is operated. After leaving the room, after waiting for TL time, return to the start and stop the ventilation fan 5. If the door opens while waiting for TL only, an interrupt occurs and the process jumps to the interrupt routine of FIG. The brightness is judged and the main routine is executed again after jumping to (2) on the flowchart of FIG. Then, when the brightness is determined by the signal of the illuminance sensor 9 and it is determined that it is dark (N in the flowchart,
In the case of O), the time after leaving the room is set to TS (TS <TL), and the routine is executed as in the case of TL.

When it is determined whether or not a person operates the ventilation fan 5 while the person is in the room, it is determined whether the room temperature detected by the temperature sensor 10 is higher or lower than the reference temperature set by the temperature setting knob 11. The program is started from the start of the main routine of FIG. 3, the door opening / closing judgment, the entry time measurement start, the brightness judgment and the routine are executed in sequence, or the interrupt routine of FIG. When it flies to (2), the ventilation fan 5 is operated when the temperature in the room detected by the temperature sensor 10 is higher than the reference temperature set by the temperature setting knob 11, and when it is lower than the reference temperature, the ventilation fan 5 is stopped. Regarding the operation of the ventilation fan 5 after the person has left the room, the nighttime and the daytime are discriminated by the signal of the illuminance sensor 9 and the operation time of the ventilation fan 5 is selected (the operation time TL for daytime, the operation time T for nighttime).
S) Execute.

When the door open / close detector cannot detect the signal that the door is open even though a person has entered the room, the human body detection sensor 8 detects the person in the room and executes the routine for starting the entry time measurement. .

Then, the execution of the program is started from the start of the main routine of FIG. 3, the door opening / closing judgment, the entry time measurement start, the brightness judgment and the routine are sequentially executed, or the interrupt routine of FIG. When the flow jumps to (2) in the flowchart of FIG. 3, whether or not to operate the ventilation fan 5 is executed depending on the magnitude of the room temperature detected by the temperature sensor 10 and the reference temperature set by the temperature setting knob 11. In that state, the system waits until the occupant touches the handle on the outside door to close the door, but if the occupant leaves the room without closing the door, the program remains in the standby state and the entry measurement time is stored in memory beforehand. When it becomes longer than the reference time stored in the above, the operation of the illuminator 6 and the ventilation fan 5 is stopped, and the process returns to the start. Next time a person enters the room, if the door is closed and then opened, the door open / close detector detects that the door has been opened and executes a normal routine, but the person who opened the door opened the door without closing it once. When the person enters the room through the door that has been kept in the state, the human body detection sensor 8 detects the person who entered the room and executes the routine for starting the entry time measurement.

As described above, according to the toilet ventilation fan of the first embodiment of the present invention, when the illuminance sensor 9 determines that it is daytime, the occupant operates the ventilation fan 5 after leaving the room for a certain time TL, and when it determines that it is nighttime. By operating the ventilation fan 5 for a time TS that is shorter than the predetermined time TL, it is possible to reduce noise due to the operation of the ventilation fan 5 at night.

When the temperature in the room is higher than the reference temperature, warm air in the room is discharged, and when the temperature in the room is lower than the reference temperature, ventilation can be effectively performed so that people do not feel cold air. .

[0023] Further, the entering person does not perform the operation of opening the door by entering from the door opened by the previous entering person,
When the door open / close detector cannot detect a person in the room, the human body detection sensor 8 detects the person in the room, and while the door open / close detector is the main force for confirming the person in the room, the human body detection sensor 8 detects the non-operation. Supplementally, it is possible to reliably detect a person entering the room.

In the first embodiment, the temperature setting knob 11 is used as the means for setting the reference temperature to the predetermined value. However, the present invention is not limited to this configuration, and the point is that the reference temperature is set to the predetermined value. It goes without saying that any means for setting can be used.

[0025]

As described above, according to the present invention, it is possible to provide a toilet ventilation fan capable of reducing the noise caused by the ventilation fan at night by discriminating whether the room is bright or dark and selecting the operating time of the ventilation fan.

When the temperature in the room is higher than the reference temperature, the ventilation fan is operated during entry into the room, and when it is low, the ventilation fan is stopped during entry into the room. It can be ventilated effectively without feeling cold.

Even if the opening of the door cannot be detected, when a person enters the room, the human body detection sensor detects the person in the room. Therefore, the door open / close detector is the main force for confirming the person entering the room. The human body detection sensor can supplement the non-operation to reliably detect the person entering the room.

[Brief description of drawings]

FIG. 1 is a perspective view showing a toilet ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the toilet ventilation fan of the first embodiment in an installed state.

FIG. 3 is a flowchart showing the operation of the main routine of the toilet ventilation fan of the first embodiment.

FIG. 4 is a flowchart showing an operation of an interrupt routine of the toilet ventilation fan according to the first embodiment.

FIG. 5 is a flowchart showing the operation of the toilet ventilation fan according to the first embodiment.

FIG. 6 is a flowchart showing a control operation of a conventional ventilation fan.

[Explanation of symbols]

4 toilets 5 ventilation fan 6 illuminator 7 control circuit 8 Human body detection sensor 9 Illuminance sensor 10 Temperature sensor

Claims (3)

(57) [Claims] 1. A door open / close detector for detecting that a person has opened the toilet door and entered the room, an illuminance sensor for detecting the brightness in the toilet, an illuminator for illuminating the toilet, and this illumination. And a control circuit for controlling the operation of a ventilation fan for lighting the toilet and for ventilating the inside of the toilet, the door opening / closing detector detects that the door is opened and a person has entered, and operates the ventilation fan, and the illuminance sensor. When it is judged that the toilet is bright and it is daytime, the lighting equipment is not turned on, the ventilation fan is operated for a certain time even after the person leaves the room and closes the door, and when the illumination sensor judges that the toilet is dark at night A toilet ventilation fan configured such that the lighting device is turned on, the ventilation fan is operated, and after the person leaves the room and closes the door, the ventilation fan is operated for a time shorter than the predetermined time. 2. A ventilating fan is provided with a temperature sensor for detecting the temperature in the toilet, and a door opening / closing detector detects that a person has entered the room when the door opens and the temperature detected by the temperature sensor is equal to or higher than a preset temperature. And enter the room
The measurement time is larger than the reference time stored in advance.
When it gets low, the ventilation fan is stopped and the entry time is longer than the reference time.
Even if it is small, when a person leaves the room, it operates for a certain period of time after leaving the room, and when the temperature detected by the temperature sensor is below the set temperature, the ventilation fan is not operated until leaving the room, and the operation is performed for the certain period of time only after leaving the room. The ventilation fan for a toilet according to claim 1. 3. A human body detection sensor for detecting the presence / absence of an occupant is provided, and a door open / close detector detects that a person has entered the room by opening the door, and activates a lighting and a ventilation fan. If the door open / closed detector fails to detect the absence of a person who has forgotten to close it, the lighting and ventilation fan are forcibly turned off after a certain period of time while operating, and then the person is opened. The toilet ventilation fan according to claim 1 or 2, wherein the human body detection sensor detects an occupant in the room and normally operates when the room enters through the door.