JPH04198641A - Automatic ventilation device for bath room - Google Patents

Abstract

PURPOSE:To set an operating time of ventilation fan to a time corresponding to a condition of a bath room to be used by a method wherein an automatic ventilation device for the bath room is comprised of a dew formation sensor for sensing a humidity in the bath room, a control part for determining a ventilation fan operating time and a switch capable of changing the operating time. CONSTITUTION:In the event that a user turns on a power supply switch 5 and a mode changing-over switch 6 placed out of a bath room and an automatic operation is set, a signal of a dew formation sensor 1 corresponding to a predetermined reference humidity is sent to a micro-computer, a signal is transmitted to a triac through the micro-computer and then a ceiling buried ventilation fan 4 is operated. The micro-computer acknowledges a rate of variation from a time when a signal of the dew formation sensor is dropped, and an operating time of the ventilation fan corresponding to the rate of variation. This is also changed in response to a set state of the changing-over switch 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic ventilation system that effectively ventilates a bathroom.

2. Description of the Related Art Traditionally, automatic ventilation systems for bathrooms detect humidity using a dew condensation sensor in the bathroom and start and stop ventilation fans. increases the relative humidity in the bathroom,
The reference humidity of the dew condensation sensor set in advance (Fig. 4A)
When the temperature exceeds point), the ventilation fan will be operated. In addition, the operating time (T2-To) of the ventilation fan is determined by the time (T, -To) during which the relative humidity in the bathroom is above the reference value, or for a certain period of time (T1) from when the relative humidity in the bathroom becomes below the reference value (T1). T2-
T.) It operated a ventilation fan.

Problems to be Solved by the Invention In such a conventional configuration, the relative humidity in the bathroom is detected by a condensation sensor and the ventilation fan is started and stopped. The drying time after bathing varies depending on the effect. For this reason, there were inconveniences such as not stopping even though the bathroom was dry, or stopping even though there was condensation on the walls, making it impossible to provide sufficient ventilation.

The present invention is intended to solve these problems, and aims to enable the user to arbitrarily set the operating time of the ventilation fan to a time that suits the conditions of the bathroom in use.

Means to Solve the Problem A dew condensation sensor detects the humidity in the bathroom and sends a signal, and when the signal from the dew condensation sensor is received and the humidity exceeds a preset standard, the ventilation fan in the bathroom is operated or the dew condensation sensor detects the humidity and sends a signal. The automatic ventilation system for a bathroom is characterized in that it is equipped with a control unit that determines the operating time of the ventilation fan based on the rate of change of the signal, and a switch that can change the operating time of the ventilation fan based on the signal from the condensation sensor. .

Effect: With this configuration, the microcomputer in the control section recognizes that the user has switched the switch, and the microcomputer's signal changes the ventilation fan operating time determined by the dew condensation sensor signal.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 3. A control unit 3 includes a condensation sensor 1 that detects humidity and sends a signal to the ceiling surface in the bathroom, a changeover switch 2 that changes the operating time, and a ceiling-embedded ventilation fan 4 that incorporates the control unit 3. A power switch 5 for turning the power on and off and a mode changeover switch 6 for switching between continuous operation and automatic operation are attached to the wall outside the bathroom. As shown in FIG. 2, the control unit 2 uses a microcomputer to recognize the signal from the dew condensation sensor 1, and operates the ceiling-mounted ventilation fan 4, and also causes the microcomputer to operate the ceiling-mounted ventilation fan 4 by setting the changeover switch 2. It counts and stops the time and is connected to the power source and the ceiling-mounted ventilation fan 4 through a power switch 5 and a mode changeover switch 6 outside the bathroom.

In the above configuration, if the user turns on the t source using the power switch 5 outside the bathroom and the mode changeover switch 6 and sets automatic operation, the preset reference humidity (the third
A signal from the dew condensation sensor 1 corresponding to FIG. In addition, as shown in Figure 3, the microcomputer recognizes the rate of change of Δ from the point when the signal of the dew condensation sensor decreases (8 points), and
Determine the operating time of the ventilation fan according to the rate of change (T4
-73=TA) Also, depending on the setting state of the selector switch (
T6-T3=TB) (T5-73=To) time. After that time has elapsed, the ceiling-embedded ventilation fan 4 is stopped. This operating time can be changed to TA, TI, or
Although it is set as Tc, it can be arbitrarily set using the selector switch 2 and the microcomputer program.

Therefore, the user can set the remaining operating time depending on the ceiling-embedded ventilation fan 4 of the bathroom and the drying condition, and can perform ventilation that suits the bathroom being used, thereby achieving the purpose of ventilation.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, after taking a bath, the ventilation fan may stop even though there is condensation on the walls in the bathroom, or even if the walls are dry. If the system does not stop, the remaining operating time can be changed using a switch, and the ventilation can be adjusted to suit the structure and size of the bathroom, as well as the location of the condensation sensor, ensuring that the purpose of ventilation is achieved. This has the effect of

[Brief explanation of the drawing]

FIG. 1 shows an automatic changeover for a bathroom showing one embodiment of the present invention. 1... Condensation sensor, 2... Changeover switch, 3... Control unit, 4... Ceiling-embedded ventilation fan, 5... Power supply Switch, 6...Mode selection switch. Name of agent: Patent attorney Osamu Koebi Akebaka 2-

Claims (1)

[Claims] A condensation sensor detects the humidity in the bathroom and sends a signal, and when the signal from this condensation sensor is received and the humidity exceeds a preset standard, the ventilation fan in the bathroom is operated, or the ventilation fan is operated according to the rate of change of the signal from the previous dew condensation sensor. An automatic ventilation system for a bathroom, characterized in that it is equipped with a control unit that determines the time, and a switch that can change the operating time of the ventilation fan based on the signal from the former dew condensation sensor.