JP3567815B2 - Hot wire automatic switch for toilet - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a toilet hot-wire automatic switch that detects a person entering and leaving a toilet room by detecting a heat ray radiated from a human body, and controls a lighting load and a ventilation fan disposed in the toilet room. is there.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a toilet hot wire automatic switch has been used to turn on an illumination load and operate a ventilation fan in response to a person entering or leaving a toilet room. This type of hot wire automatic switch for a toilet includes a human sensor that detects the presence or absence of a person by using a heat sensor (generally using a pyroelectric infrared sensor) that detects a heat ray emitted from the human body. It is determined whether or not a person exists in the toilet room based on the output of (1) (JP-A-64-14534). As shown in the right half of FIG. 7A, the hot-wire automatic switch for a toilet described in this publication shows that when a person enters the toilet room at time t2 when the surroundings are dark such as at night, FIG. ), The lighting fan is turned on, and at the same time, the operation of the ventilation fan is started as shown in FIG. 7 (b). When the person leaves the toilet room, the lighting load is turned off, and then the ventilation fan is operated for the specified time AT1. After that, it is configured to stop the ventilation fan.
[0003]
[Problems to be solved by the invention]
By the way, as described above, if a configuration is adopted in which the ventilation fan is operated from the entrance of the person into the toilet room and the operation of the ventilation fan is continued until after the person leaves the room, drafts will be generated due to ventilation during use of the toilet. However, when the temperature is low, such as in winter, you will feel chilly.
[0004]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a hot wire automatic switch for a toilet in which the possibility of chills due to drafts generated by operation of a ventilation fan is reduced.
[0005]
[Means for Solving the Problems]
The invention of claim 1 is a human sensor that detects the presence or absence of a person by detecting a heat ray radiated from a human body, and detects entry and exit of a person into a toilet room by an output of the human sensor, and During the period from the entry of a person into the toilet room to the exit, a lighting control signal for lighting the lighting load is output, and a ventilation fan control signal for operating the ventilation fan from the entry of the person into the toilet room is output. Control means for outputting a ventilation fan control signal for operating the ventilation fan for a specified time from the leaving of the room while the ventilation fan is stopped by a stop signal input from the controller, and a lighting control signal and a ventilation fan control signal for controlling the opening and closing of the ventilation fan respectively. is input to the first and a second closing part, said control means by said stop signal is manually pause switch disposed in the wall of the toilet room Is shall.
[0008]
The invention of claim 2 is the invention of claim 1, the temporary stop switch is obtained by a push-button switch.
[0009]
According to a third aspect of the present invention, in the first or the second aspect of the present invention, a brightness sensor for detecting the ambient illuminance is added. The control of the first opening / closing unit by the lighting control signal is invalidated to keep the lighting load in the off state.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
As shown in FIG. 1, a power supply terminal T1 to which a commercial power supply is connected, a first output terminal T2 to which a lighting load is connected, and a second output terminal T3 to which a ventilation fan is connected are provided. The commercial power supply connected to the power supply terminal T1 is rectified and stabilized in the constant voltage circuit 11 and outputs a DC constant voltage. Power from the internal circuit is supplied from the constant voltage circuit 11.
[0011]
The presence or absence of a person in the toilet room is detected by a human sensor 12 having a heat ray sensor (using a pyroelectric infrared sensor). The pyroelectric infrared sensor is a differential sensor that generates an output voltage having an amplitude corresponding to a change in the received heat dose. The sensor 12 outputs a pulse-like detection signal. Further, the pyroelectric infrared sensor used for the human sensor 12 does not move even if the person is present in the visual field, and the output voltage cannot be obtained unless the heat dose changes. No detection signal is obtained. In other words, if the lighting load is turned on only when the detection signal is obtained, the lighting load is turned off when the movement of the person stops, even though the person is within the field of view of the heat ray sensor. is there. Therefore, a configuration is adopted in which a timer 10a that limits the predetermined operation holding time from the time of generation of the detection signal every time the detection signal is generated is provided, and lighting of the illumination load is continued during the timed operation of the timer 10a. That is, the timer 10a is configured to perform a timed operation when triggered by the detection signal and to be able to trigger again.
[0012]
The timer 10a is constituted by a microcomputer 10 as a control means, and a setting volume 13 for adjusting the time limit of the timer 10a is also connected to the microcomputer 10. With the setting volume 13, the time limit of the timer 10a can be adjusted in a range from about 10 seconds to about 6 minutes. Further, a brightness sensor 14 for detecting the surrounding brightness is connected to the microcomputer 10, and when the ambient illuminance detected by the brightness sensor 14 is equal to or more than a specified value, the control of the lighting load is invalidated, and the lighting load is reduced. Keep the lights off.
[0013]
The microcomputer 10 supplies an illumination control signal and a ventilation fan control signal to the open / close control units 15 and 16 in accordance with the outputs of the human sensor 12 and the brightness sensor 14, respectively, and opens and closes the open / close control units 15 and 16 to thereby load the lighting load. And control the ventilation fan. The opening / closing portions 15 and 16 include a switch element. As the switch element, a three-terminal bidirectional thyristor (triac) or an electromagnetic relay is used. The switch element is provided between the power terminal T1 and each of the output terminals T2 and T3. Has been inserted.
[0014]
By the way, the prescribed value for the ambient illuminance detected by the brightness sensor 14 is selected in a plurality of steps (two steps in the embodiment) by the brightness setting switch 14a. The brightness setting switch 14a can also select a state in which the output of the brightness sensor 14 is invalidated. Further, a mode changeover switch 17 is connected to the microcomputer 10 so as to open and close the open / close sections 15 and 16 in conjunction with the detection of a person by the motion sensor 12. Three modes can be selected: an off mode in which the open / close sections 15 and 16 are kept off, and an on mode in which the open / close sections 15 and 16 are kept on regardless of the output of the human sensor 12.
[0015]
Next, the operation will be described. Now, it is assumed that the brightness setting switch 14a selects a state in which the opening / closing unit 15 is opened and closed according to the ambient illuminance detected by the brightness sensor 14, and the mode changeover switch 17 selects the automatic mode. In this case, when the surrounding illuminance detected by the brightness sensor 14 becomes lower than the specified value set by the brightness setting switch 14a and the surroundings become dark, the illuminance depends on whether the human sensor 12 detects a person. Opening / closing parts 15 and 16 are controlled. However, since the opening / closing unit 16 is used for controlling the ventilation fan, the opening / closing unit 16 is controlled according to the presence or absence of the detection of a person by the human sensor 12 regardless of the surrounding illuminance.
[0016]
That is, when the surroundings are bright as shown in the left half of FIG. 2A, the opening / closing unit 15 that controls the lighting load detects a person at time t1 by the human sensor 12 as shown in FIG. 2C. Is also kept off. Here, a period indicated by a broken line in FIG. 2C indicates a period in which the timer 10a performs a timed operation by detecting a person. The timed operation of the timer 10a is started at the time when the detection signal is generated. When the detection signal is generated again from the human sensor 12 during the timed operation of the timer 10a, the timer 10a is retriggered. That is, the timer 10a continues the timed operation while the next detection signal is obtained during the timed operation of the timer 10a. Therefore, the period indicated by the broken line in FIG. 2C indicates the period from when the person enters the toilet room until the person exits. Here, the time point of leaving the room means a time point at which the state in which no person is detected by the human sensor continues for the operation holding time. Thus, as shown in FIG. 2B, the opening / closing unit 16 for controlling the ventilation fan is turned on when a person leaves the toilet room, and turned off when a prescribed time (for example, 5 minutes) AT1 has elapsed. The specified time AT1 is also time-limited by the microcomputer 10, but the specified time AT1 is fixedly set.
[0017]
When the surroundings are dark as shown in the right half of FIG. 2A, the opening / closing unit 15 for controlling the lighting load is turned on at the time t2 when the person is detected by the human sensor 12 as shown in FIG. 2C. become. After the opening / closing section 15 is turned on, the timer 10a is retriggered when the detection signal is again generated from the human sensor 12 during the timed operation of the timer 10a, similarly to the case where the surroundings are bright, and the timer 10a starts the timed operation. continue. The opening / closing unit 15 continues to be on while the timed operation of the timer 10a continues. On the other hand, the opening and closing unit 16 for controlling the ventilation fan operates in the same manner as when the surroundings are bright, and opens and closes when the timer 10a ends the timed operation as shown in FIG. 2B, that is, when the opening and closing unit 15 is turned off. The unit 16 is turned on, and thereafter, when the specified time AT1 has elapsed, the opening / closing unit 16 is turned off.
[0018]
As is clear from the above description of the operation, when the surroundings are dark, the lighting load is turned on when a person enters the toilet room, and turned off when the person leaves the room (when the state in which no person is detected continues for the operation holding time). At the same time, the ventilation fan starts operating and the ventilation fan stops after the specified time AT1. When the surroundings are bright, the lighting load does not turn on even when a person enters the room, but the ventilation fan is operated for the specified time AT1 after the person leaves the room. As described above, since the ventilation fan is not operated while the person is in the toilet room, the chill caused by the draft of the operation of the ventilation fan does not feel chilly. Will be done.
[0019]
In the above example, the case where the operation is changed according to the detection of the ambient illuminance by the brightness sensor 14 has been described. However, when there is no window in the toilet in an apartment house or the like, when a person enters regardless of the ambient illuminance, Since the lighting load needs to be turned on, in this case, the brightness sensor 14 may be disabled by the brightness setting switch 14a.
[0020]
(Second embodiment)
In the first embodiment, the ventilation fan is controlled so as not to be operated during the period from when the person enters the toilet room to when the person leaves the room, but in the present embodiment, the operation is performed after the person enters the room until the person leaves the room. The ventilation fan can be operated even during the period. However, unlike the conventional configuration, the ventilation fan is not always operated while the person is in the toilet room, but the ventilation fan can be stopped at an arbitrary time according to the user's intention.
[0021]
In order to enable such an operation, as shown in FIG. 3, the microcomputer 10 is provided with a signal processing unit 18 that receives an external stop signal and stops the operation of the ventilation fan. The stop signal to the signal processing unit 18 is input through the input terminal T4. Unlike the first embodiment, the microcomputer 10 according to the present embodiment operates to turn on the opening / closing unit 16 and operate the ventilation fan when a person is detected by the human sensor 12. However, if the timer 10a is in the timed operation, the opening / closing unit 16 can be turned off at any time by the stop signal input through the signal processing unit 18. The stop signal is a signal for short-circuiting between the input terminals T4. In this embodiment, a push button switch is connected to the input terminal T4 as a temporary stop switch 20 (see FIG. 5). Short between the input terminals T4.
[0022]
That is, when the surroundings are bright, as shown in the left half of FIG. 4A, the opening / closing unit 15 for controlling the lighting load detects the person at the time t1 by the motion sensor 12 as shown in FIG. 4C. Is also kept off. However, the period shown by the broken line in FIG. 4C is a period during which the timer 10a is performing a timed operation by detecting a person, in other words, a period from when a person enters the toilet room to when he leaves the room. Is shown. The opening / closing unit 16 for controlling the ventilation fan is turned on when a person enters the toilet room at time t1 as shown in FIG. 4B, and during the timed operation of the timer 10a, the pause switch 20 is turned on at time t3. Is turned off at that point in time when the stop signal is generated by the push operation. However, even if the operation of the ventilation fan is stopped by the temporary stop switch 20, when the timed operation of the timer 10a ends, the ventilation fan restarts its operation and stops when the specified time (for example, 5 minutes) AT1 has elapsed. The specified time AT1 is fixedly set.
[0023]
When the surroundings are dark as shown in the right half of FIG. 4A, the opening / closing unit 15 for controlling the lighting load is turned on at the time t2 when the human sensor 12 detects a person as shown in FIG. 4C. become. After the opening / closing section 15 is turned on, the timer 10a is retriggered when the detection signal is again generated from the human sensor 12 during the timed operation of the timer 10a, similarly to the case where the surroundings are bright, and the timer 10a starts the timed operation. continue. The opening / closing unit 15 continues to be on while the timed operation of the timer 10a continues. The opening / closing unit 16 for controlling the ventilation fan operates in the same manner as when the surroundings are bright, and starts operating at time t2 when a detection signal is generated from the human sensor 12 as shown in FIG. After the end of the timed operation, the operation continues for the specified time AT1. However, if the pause switch 20 is pressed and a stop signal is generated at time t4 during the timed operation of the timer 10a, the ventilation fan is stopped at this time. Also in this case, when the timed operation of the timer 10a ends, the operation of the ventilation fan is restarted assuming that the person has left the room, and the ventilation fan is stopped after the lapse of the specified time AT1.
[0024]
In the present embodiment, the ventilation fan starts operating when a person enters the toilet room. However, the user of the toilet room can stop the ventilation fan by the stop switch 20, so that when the user feels chilly, When the operation of the ventilation fan is not required, such as during use or cleaning, the ventilation fan can be stopped. In addition, when the person leaves the room, the ventilation fan is automatically operated for the specified time AT1, so that the odor associated with the use of the toilet room can be exhausted by the ventilation fan.
[0025]
In actual use, as shown in FIG. 5, the hot-wire automatic switch IS described in the present embodiment is attached to the ceiling surface 23 above the toilet 22 in the toilet room 21, and the output terminals T2 and T3 are respectively provided. The lighting load L and the ventilation fan F are connected via a load line Ld, and a temporary stop switch 20 is connected to the input terminal T4 via a switch line Ls. The pause switch 20 is attached to a wall surface in the toilet room so that a person who is using the toilet room can easily operate the switch. A commercial power supply is connected to the power supply terminal T1 via the electric wire Lp.
[0026]
The body 30 of the hot wire automatic switch IS has a flange portion 31 at a lower end portion as shown in FIG. 6, and is formed in a shape having a housing portion 32 on the upper surface side of the flange portion 31. In order to mount the container 30 on the ceiling surface, the housing portion 32 is inserted into a mounting hole (not shown) formed in the ceiling surface, and the flange portion 31 is brought into contact with the lower surface of the peripheral portion of the mounting hole. The body 30 is fixed to the ceiling surface using a fixing tool. That is, when a switch box (not shown) is provided in the ceiling, a box screw (not shown) screwed into the switch box through a box hole 33 formed in the flange portion 31 is used as a fixture. In the case where the switch box is not used, a clamp plate (not shown) which is connected to the flange portion 31 and can clamp the ceiling plate with the flange portion 31 is used as a fixture, and The holding plate is screwed into a tightening screw that can be rotated through the provided insertion hole 34, and the distance between the holding plate and the flange portion 31 is changed by the rotation of the tightening screw. That is, the holding plate is screwed to the tightening screw, and after inserting the housing portion 32 into the mounting hole, the tightening screw is rotated to bring the holding plate closer to the flange portion 31. The periphery of the mounting hole is sandwiched between them. When a switch box is not used, a wood screw may be inserted into the box hole 33 as a fixture, and the wood screw may be screwed to the ceiling material.
[0027]
When the container 30 is attached to the ceiling as described above, the housing portion 32 is stored in the ceiling. An electric wire insertion hole 35 constituting the power terminal T1, the output terminals T2, T3, and the input terminal T4 is opened on the upper surface of the housing portion 32. That is, the power supply terminal T1, the output terminals T2, T3, and the input terminal T4 are quick-connecting terminals using a locking spring made of a leaf spring, and are the distal ends of the wires inserted into the body 30 through the wire insertion holes 35. Are locked using the spring force of a locking spring. A release hole 36 is formed in the vicinity of the electric wire insertion hole 35. If the tip of a flathead screwdriver or the like is inserted into the release hole 36, the locking spring can be bent to release the locked state of the electric wire. It has become. The structure of this type of quick connection terminal is well known.
[0028]
A lens 37 for allowing heat rays to enter the human sensor 12 is provided on the flange portion 31 exposed from the ceiling surface to the lower surface, and a setting volume 13, a brightness setting switch 14a, and a mode switch are provided on the lower surface of the flange portion 31. 17 operation parts are exposed. However, the lower surface side of the flange portion 31 is covered by a decorative plate (not shown) except for the lens 37, and these operation portions are normally hidden. The decorative plate is detachably engaged with the flange portion 31 and can be easily removed from the flange portion 31 as needed. Other configurations and operations are the same as those of the first embodiment.
[0029]
【The invention's effect】
According to the first aspect of the present invention , the ventilation fan is operated from the entrance of the person into the toilet room, and the ventilation fan can be stopped by giving a stop signal from outside during the exit from the entrance of the person. Can be appropriately stopped. In other words, when the temperature is low, such as in winter, it is possible to stop the ventilation fan so that drafts do not occur. Conversely, in summer, etc., when the temperature is high, the ventilation fan is continuously operated to release outside air from the gap. Can be taken indoors. Further, even if the ventilation fan is stopped by the stop signal before the person leaves the room, the ventilation fan is operated for a specified time after the person leaves the room, so that the odor can be discharged. Furthermore, since the operation of the ventilation fan can be temporarily stopped by manually operating the pause switch disposed on the wall of the toilet room, the continuous operation and the pause of the ventilation fan are selected according to the intention of the user of the toilet room. Can be .
[0032]
A second aspect of the present invention, since it is possible to stop the ventilation fan by pressing operations, it is those easy identification ventilator stop operation and stain removal by using the push button switch covering the operation section a thin synthetic resin sheet is This makes it easier to keep the operation section clean.
[0033]
A third aspect of the present invention, without turning on the lighting load when the ambient illuminance is high, as between daytime, it is possible to suppress the wasteful power consumption.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of the present invention.
FIG. 2 is an operation explanatory view of the above.
FIG. 3 is a block diagram showing a second embodiment of the present invention.
FIG. 4 is an operation explanatory diagram of the above.
FIG. 5 is a diagram showing a usage example of the above.
6A and 6B are external views of the above, where FIG. 6A is a bottom view with a decorative plate removed, and FIG. 6B is a plan view with a decorative plate removed.
FIG. 7 is an operation explanatory diagram of a conventional configuration.
[Explanation of symbols]
Reference Signs List 10 Microcomputer 12 Human sensor 14 Brightness sensor 15, 16 Opening / closing unit 21 Pause switch

Claims (3)

A human sensor that detects the presence or absence of a person by detecting a heat ray radiated from the human body, and detects the entry and exit of the person into the toilet room by the output of the human sensor, and at least the entry of the person into the toilet room. Outputs a lighting control signal to turn on the lighting load during the period from the exit to the room exit, and outputs a ventilation fan control signal to operate the ventilation fan from the person entering the toilet room. Control means for outputting a ventilation fan control signal for operating the ventilation fan for a specified time after the person leaves the room while the ventilation fan can be stopped, and first and second opening / closing sections which are respectively opened and closed by the lighting control signal and the ventilation fan control signal with the door, the stop signal is inputted to the control unit by manually pause switch disposed in the wall of the toilet room be characterized Rukoto Hot-wire automatic switch for the toilet. The hot wire automatic switch for a toilet according to claim 1, wherein the temporary stop switch is a push button switch. A brightness sensor for detecting the ambient illuminance is added. When the ambient illuminance detected by the brightness sensor is equal to or more than a specified value, the control unit invalidates the control of the first opening / closing unit by the illumination control signal to reduce the illumination load. The hot wire automatic switch for toilet according to claim 1 or 2, wherein the automatic switch is kept off .

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