JPH0384346A - Controlling device for ventilating fan for bath room - Google Patents

Abstract

PURPOSE:To prevent useless consumption of a power by a method wherein when humidity exceeds a set value at a point of time when a first timer time elapses, a ventilating fan is switched to a high ventilating capacity state, and thereafter when humidity exceeds a set value at a point of time when a second timer time elapses, a display means is driven. CONSTITUTION:A signal converting circuit 9 converts detecting humidity into an electric signal Vd by means of a humidity sensor 7, and a signal generating circuit 10 outputs a reference signal Vs of a voltage level responding to set humidity Hj. In a state in which humidity outside a bath room is relatively high and when a timer time Tb set at a timer circuit 13 elapses after the starting of ventilating operation, in the case of Vd > Vs, a control circuit 14 runs a motor 2 at a high speed through a driven circuit 17, and a ventilating fan 1 is switched to an operation state at high ventilating capacity. Thereafter, when a state of Vd > Vs is continued and a timer time Tc set at a timer circuit 15 elapses, a control circuit 14 stops running of the motor 2 through the working of a motor drive circuit 17, and simultaneously a light emitting element 8 is lighted through the working of a display drive circuit 16.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention provides a control for a bathroom ventilation fan that automatically operates the bathroom ventilation fan until the inside of the bathroom becomes dry. Regarding equipment.

(Prior Art) Conventionally, as an example of a device that performs drying operation in a bathroom using a ventilation fan, a humidity sensor is installed to detect the humidity in the bathroom. A configuration is provided in which an operation control means is provided to control the operation of the bathroom ventilation fan based on the humidity. The ventilation fan is configured to start operating the bathroom ventilation fan when the detected humidity drops below the set humidity, and to continue operating the ventilation fan for a predetermined delay time and then stop its operation. There is.

(Problems to be Solved by the Invention) However, the conventional structure described above has the following drawbacks. That is, bathroom ventilation fans are configured to operate at a constant ventilation capacity regardless of changes in the humidity inside the bathroom, so when the humidity outside the bathroom is relatively high, such as during the rainy season or during rainfall, In other words, if the humidity of the air flowing into the bathroom is high when the ventilation fan is operated, there is a possibility that the operating time of the ventilation fan will be increased unnecessarily. In addition, if the humidity outside the bathroom is extremely high, the ventilation fan may be used to dry the bathroom. ? In some cases, the humidity detected by the humidity sensor may not fall below the set humidity no matter how long it takes.
In such a case, the operation of the ventilation fan may continue for an unnecessarily long period of time, resulting in unnecessary power consumption.

The present invention has been made in view of the above circumstances, and its purpose is to prevent the time required for the drying operation inside the bathroom from prolonging due to the high humidity outside the bathroom, and to A bathroom ventilation fan that can automatically display a message to that effect when it becomes disabled due to humidity outside the bathroom, thereby preventing wasteful power consumption. Provides control equipment.

[Structure of the Invention (Means for Solving the Problems)] In order to achieve the above object, the present invention provides a method for detecting humidity at a predetermined level from the point in time when the humidity detected by the humidity sensor becomes equal to or lower than the set humidity while the ventilation fan is operating to ventilate the bathroom. In a bathroom ventilation fan control device comprising an operation control means for stopping the operation of the ventilation fan when a delay time of The ventilation fan is initially operated in a low ventilation capacity state, and if the humidity detected by the humidity sensor exceeds the set humidity when the first timer time set in the first timer means has elapsed, the ventilation fan is operated in a high ventilation capacity state. When the detected humidity exceeds the set humidity when the second timer time set in the second timer means has elapsed, the display means is driven.

(Function) The ventilation fan is initially operated with low ventilation capacity, and when the humidity in the bathroom falls below the set humidity due to such ventilation operation, the ventilation fan will start operating after a predetermined delay time has elapsed from that point. The operation of the ventilation fan will be automatically stopped. In this case, when the humidity outside the bathroom is relatively high,
Due to the fact that highly humid air flows into the bathroom during the ventilation operation, the humidity in the bathroom decreases at a slower rate, and the ventilation operation time becomes longer. However, in such a state, the ventilation fan is switched to the high ventilation capacity state when the first timer time set in the first timer means has elapsed, so the drying speed in the bathroom is accelerated and the drying process is accelerated. This prevents a situation where the time required for driving is prolonged indefinitely. Additionally, if the humidity outside the bathroom is extremely high, the humidity inside the bathroom may not fall below the set humidity no matter how long it takes, even if the state is switched to a high ventilation capacity state as described above. However, in this case, the display means is driven when the second timer time set in the second timer means has elapsed after switching to the high ventilation capacity state. It is notified that operation has become impossible due to the humidity outside the bathroom, and it becomes possible to take measures such as stopping the unnecessary operation of the ventilation fan.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, in Fig. 2, reference numeral 1 denotes a ventilation fan for ventilating the bathroom, and this is of a well-known configuration equipped with a motor 2 and an axial fan 3, and a decorative frame 4 is provided in front of it. It is being At this time, the rotational speed of the motor 2 can be switched in two stages by so-called tap selection, thereby making it possible to switch the ventilation capacity of the ventilation fan 1 into two stages, high and low. Reference numeral 5 denotes a ventilation window formed at the corner of the decorative frame 4, which has a shape with a large number of slits, and a sensor chamber 6 isolated from the ventilation path by the fan 3 is provided on the back side of the window. It is being A humidity sensor (indicated by reference numeral 7 in FIG. 1) for detecting the humidity in the bathroom through the ventilation window portion 5 is disposed within the sensor chamber 6. Furthermore, a light emitting element 8 serving as a display means is provided at the lower front of the decorative frame 4.

In FIG. 1, the electrical configuration is shown as a combination of functional blocks, which will be explained below.

That is, 9 is a signal conversion circuit that receives the output of the humidity sensor 7, and converts the humidity detected by the humidity sensor 7 into a voltage signal Vd of a level corresponding to the humidity.

Reference numeral 10 denotes a signal generating circuit which outputs a reference signal Vs at a voltage level corresponding to a set humidity Hj (humidity when the inside of the bathroom is in a predetermined dry state). 11 is the voltage signal V
d and a reference signal Vs, which indicates that Vd≦
When the relationship is Vs, in other words, when the humidity detected by the humidity sensor 7 is lower than the set humidity Hj, the low humidity detection signal S2 is output, and when the relationship is Vd>Vs,
In other words, the humidity detected by the humidity sensor 7 is the set humidity Hj
A high humidity detection signal sy is output when the humidity exceeds the humidity.

Reference numeral 12 denotes a delay timer circuit, which operates for a predetermined delay time T from the time when the low humidity detection signal Sz is output from the comparator circuit 11.
A timer operation is performed for a period of, for example, 3 hours, and a time-up signal Sa is output when the timer operation ends. ] 3 is a first timer circuit, which is a first timer means, which performs a timer operation for a first timer time Tb (for example, 6 hours) in response to an operation command from the control circuit 14, which is an operation control means. When the time-up signal sb is completed, the time-up signal sb is output. A second timer circuit 15 is a second timer means, which performs a timer operation for a second timer time Tc (for example, 6 hours) in response to an operation command from the control circuit 14, and when the timer operation ends, A time-up signal Sc is output.

Further, 16 is a display drive circuit for driving the light emitting element 8 based on an operation command from the control circuit 14, and 17 is a motor drive circuit for driving the motor 2 based on an operation command from the control circuit 14. The circuit is configured to select taps for the motor 2 at the same time based on the operation commands.

Now, the control circuit 14 includes each timer circuit 13 as described above.
．． 15 and each drive circuit 16 and 17,
It controls output based on the high humidity detection signal Sy1 from the comparison circuit 11, the low humidity detection signal Sz, the time-up signals Sa, Sb, and Sc from each timer circuit 12, 13, and 15, and a pre-stored program. ,
The details of the control will be explained below along with related effects with reference to FIG.

That is, FIG. 3 shows the change state of the voltage signal Vd (that is, the change state of the humidity inside the bathroom) accompanying the operation of the ventilation fan 1, and FIG. 3(a) shows a state where the humidity outside the bathroom is relatively low. (
b) corresponds to a state where the humidity outside the bathroom is relatively high, and (C) corresponds to a state where the humidity outside the bathroom is extremely high. However, now,
When the humidity in the bathroom increases due to bathing, etc. and exceeds the set humidity Hj, the voltage signal Vd and reference signal VsfJ (Vd>Vs
Therefore, the high humidity detection signal sy is outputted from the comparison circuit 11 and given to the control circuit 14. Then, the control circuit 14 starts rotating the motor 2 at a low speed through the motor drive circuit 17, and accordingly, the ventilation fan 1
is operated with low ventilation capacity. Further, the control circuit 14 gives an operation command to the first timer circuit 13 from the time when the high humidity detection signal sy is received, thereby starting the timer operation.

When the humidity in the bathroom falls below the set humidity Hj due to ventilation operation with such a low ventilation capacity, and the relationship Vd≦Vs is established as shown at time t2 in FIG. 3(a), the comparator circuit 11 A low humidity detection signal Sz is output. When the low humidity detection signal S2 is output in this way, the delay timer circuit 12 starts the timer operation, and when the delay time Ta has elapsed, the delay timer circuit 12 outputs the time-up signal Sa. The signal is applied to the control circuit 14 (time t3 in FIG. 3(a)). Then, the control circuit 14
In this case, the drive of the motor 2 via the motor drive circuit 17 is stopped, thereby ending the ventilation operation of the ventilation fan 10.

In other words, when the humidity outside the bathroom is relatively low, ventilation fan 1 is operated at a low ventilation capacity to dry the inside of the bathroom, and once the drying has sufficiently progressed, ventilation fan 1 automatically starts operating. will be stopped.

On the other hand, when the humidity outside the bathroom is relatively high, high-humidity air flows into the bathroom due to the ventilation operation by the ventilation fan 1, so the humidity inside the bathroom and the rate at which the voltage signal Vd decreases decreases as shown in Figure 3 (b). ) as shown below. Then, when the first timer time Tb set in the first timer circuit 13 has elapsed after the start of ventilation operation, a time-up signal sb is output from the timer circuit 13 and given to the control circuit 14 (the third Figure (b) middle time ta).

At this time, if the relationship of Vd>Vs remains, that is, if the low humidity detection signal Sz is not given to the control circuit 14, the control circuit 14 controls the motor 2 through the motor drive circuit 17. is rotated at high speed, and the ventilation fan 1 is switched to the operating state with high ventilation capacity. As a result, as shown in FIG. 3(b), the voltage signal Vd begins to decrease relatively quickly, and accordingly, the humidity in the bathroom falls below the set humidity Hj. When the relationship Vd≦Vs is established at time t5 (not shown in (b)), l'
Ventilation operation of ventilation fan 1 is terminated at point lS (time ts)
. The control circuit 14 gives an operation command to the second timer circuit 5 from the time when it receives the time-up signal sb,
Then, the timer operation is started.

Therefore, when the humidity outside the bathroom is relatively high, the ventilation fan 1 is automatically switched to a high ventilation capacity state and the drying speed inside the bathroom is accelerated, thereby lengthening the time required for drying operation. The situation is prevented.

In addition, if the humidity outside the bathroom is extremely high, even if the ventilation fan 1 is switched to the high ventilation capacity state as described above, the humidity inside the bathroom will remain below the set humidity Hj for a long time. Therefore, as shown in FIG. 3(C), the state of Vd>V2 S may continue. In this case, time t4
After the ventilation fan 1 is switched to the high ventilation capacity state, when the second timer time Tc set in the second timer circuit 5 has elapsed, the timer circuit 15 outputs a time-up signal Sc. The signal is applied to the control circuit 14 (time tT in FIG. 3(C)). Then, in the control circuit 14 that has received the time-up signal Sc without receiving the low humidity detection signal Sz, it stops driving the motor 2 through the motor drive circuit 17, and at the same time stops driving the light emitting element through the display drive circuit 16. Turn on 8.

Therefore, a situation in which wasteful operation of the ventilation fan 1 is inadvertently continued is prevented, and the fact that the drying operation has become impossible due to the humidity outside the bathroom is notified by lighting the light emitting element 8. will be done.

In the above embodiment, the comparison circuit 11. The functions of each timer circuit 12, 13.15 and control circuit 14 can be obtained using a microcomputer. -Also, in the above embodiment, the driving of the motor 2 is stopped at the same time as the light emitting element 38 is turned on, but such stop control may be performed as necessary.

[Effects of the Invention] According to the present invention, as is clear from the above explanation, when the ventilation fan's ability to dry the corner of the bathroom is insufficient due to humidity outside the bathroom, the ventilation ability of the ventilation fan is automatically increased and If the inside of the bathroom has not been sufficiently dried even after a predetermined period of time has elapsed, the display means is activated. In addition to preventing the drying time from prolonging, a message to that effect can be automatically displayed when the drying operation is disabled due to humidity outside the bathroom, thereby reducing unnecessary power consumption. This has the excellent effect of being able to prevent this from happening.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram of the electrical configuration, Fig. 2 is a perspective view of a ventilation fan, and Fig. 3 is a characteristic diagram showing the proportionality of humidity detected by a humidity sensor. It is. In the figure, ] is a ventilation fan, 2 is a motor, 7 is a humidity sensor, 8 is a light emitting element (display means), 9 is a signal conversion circuit, 10 is a signal generation circuit, 11 is a comparison circuit, 12 is a delay timer circuit, 1
3 is a first timer circuit (first timer means), 14 is a control circuit (operation control circuit), 15 is a second timer circuit (second timer means), 16 is a display drive circuit, and 17 is a motor drive. Shows the circuit.

Claims (1)

[Claims] 1. A device that controls a ventilation fan that performs ventilation operation in the bathroom, including a humidity sensor that detects the humidity in the bathroom, and a point in time when the humidity detected by the humidity sensor becomes equal to or lower than the set humidity while the ventilation fan is in operation. and an operation control means for stopping the operation of the ventilation fan when a predetermined delay time has elapsed from means for initially operating the ventilation fan in a low ventilation capacity state and a first timer means set to a first timer means;
If the humidity detected by the humidity sensor exceeds the set humidity when the timer time elapses, the ventilation fan is switched to a high ventilation capacity state, and after this, the second timer time set in the second timer means elapses. A control device for a bathroom ventilation fan, characterized in that the controller is configured to drive a display means if the detected humidity exceeds a set humidity at the time when the detected humidity exceeds a set humidity.