JP3567817B2 - 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 hot wire automatic switch for a toilet that turns on an illumination load and operates a ventilation fan according to a person entering or leaving a toilet room has been used. 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-11-63596). It also has two switch elements that are controlled to open and close according to the output of the human sensor to separately control the lighting load and the ventilation fan. One switch element is located between the commercial power supply and the lighting load. The other switch is inserted between the commercial power supply and the ventilation fan. That is, a power supply terminal to which a commercial power supply is connected and two sets of output terminals to which a lighting load and a ventilation fan are respectively connected are provided, and each switch element is inserted between each output terminal and the power supply terminal. Therefore, a voltage contact output is obtained at each output terminal.
[0003]
By using this type of hot wire automatic switch for toilet, it is possible to prevent the lighting load and the ventilation fan from being forgotten to be turned off, so that wasteful consumption of electric power can be suppressed. In addition, when entering or leaving the toilet room, the lighting load is automatically turned on without operating the switch, and the ventilating fan can be automatically operated. In a toilet room used by a third person, the lighting load and the ventilation fan can be controlled without the discomfort associated with operating the switch, and the convenience is improved.
[0004]
[Problems to be solved by the invention]
By the way, as described above, this type of hot-wire toilet automatic switch is configured to generate only a voltage contact output, and thus has a control terminal that is operated and controlled by opening and closing external contacts. things can such have to control the lighting load and ventilation fan.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hot wire automatic switch for a toilet that enables use of a lighting load or a ventilation fan whose operation is controlled by opening and closing external contacts. It is in.
[0006]
[Means for Solving the Problems]
The invention according to 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 and from a toilet room based on an output of the human sensor. Control means for outputting a lighting control signal for lighting a lighting load during a period from entry of a person into the room to exit from the room, and outputting a ventilation fan control signal for operating a ventilation fan for at least a specified time from the exit of the person, and a lighting control signal. A first and a second switch element, each of which is controlled to be opened and closed by a ventilation fan control signal, and an output terminal to which both ends of at least one of the two switch elements are connected are provided on at least one of a lighting load and a ventilation fan. by connecting the output terminals with respect to being a control terminal for operation control by opening and closing the external contact, even that occur a dry contact output to the control terminal It is. The entry of a person into the toilet room is defined as the point in time when a person is detected by the human sensor, and the exit of the person from the toilet room is defined as the point in time when the state in which no person is detected by the human sensor continues for the operation holding time described later. means.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, both ends of the two switch elements are respectively connected to different output terminals to generate a non-voltage contact output between both ends of each output terminal.
[0009]
According to a third aspect of the present invention, in the first or second aspect , one of the two switch elements is a semiconductor switch element and the other is an electromagnetic relay.
[0010]
According to a fourth aspect of the present invention, in the first or second aspect , both of the switch elements are semiconductor switch elements.
[0011]
According to a fifth aspect of the present invention, in the first or second aspect of the present invention, both of the switch elements are electromagnetic relays.
[0014]
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.
[0015]
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.
[0016]
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.
[0017]
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. The lighting load and the ventilation fan are controlled by opening and closing SW2. As the switch elements SW1 and SW2, a three-terminal bidirectional thyristor (triac) or an electromagnetic relay is used. In the example shown in FIG. 1, the output terminal T2 connected to the lighting load is connected to both ends of the switch element SW1 composed of the triac. The output terminal T3 connected to the ventilation fan is connected to both ends of a switch element SW2 composed of an electromagnetic relay. The switch elements SW1 and SW2 may both be triacs, or both may be electromagnetic relays, or the switch element SW1 for the lighting load may be an electromagnetic relay and the switch element SW2 for the ventilation fan may be a triac.
[0018]
If the switch element SW1 for the lighting load is a triac, the lighting load can be dimmed by controlling the phase of the triac using an incandescent lamp as the lighting load. Further, if the switch element SW1 for the lighting load is an electromagnetic relay, a fluorescent lamp having an inverter-type lighting circuit can be used for the lighting load. For example, when an incandescent lamp is used, a triac is used for the switch element SW1, and by controlling the phase of the switch element SW1, it becomes possible to perform a soft start in which the light output of the incandescent lamp is gradually increased from the start of lighting. Inrush current at the time can be suppressed.
[0019]
By the way, the specified value for the ambient illuminance detected by the brightness sensor 14 is selected in a plurality of stages (two stages in the present 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 two switch elements SW1 and SW2 in conjunction with the detection of a person by the motion sensor 12 and to operate both of the two modes independently of the output of the motion sensor 12. Three modes can be selected: an off mode in which the switch elements SW1 and SW2 are turned off, and an on mode in which both the switch elements SW1 and SW2 are turned on regardless of the output of the human sensor 12.
[0020]
Next, the operation will be described. Now, it is assumed that the state in which the switch element SW1 is opened and closed is selected by the brightness setting switch 14a in accordance with the ambient illuminance detected by the brightness sensor 14, and the automatic mode is selected by the mode changeover switch 17. 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. The switch elements SW1 and SW2 are controlled. However, since the switch element SW2 is used for controlling the ventilation fan, the switch element SW2 is controlled in accordance with the presence or absence of the detection of a person by the human sensor 12 regardless of the surrounding illuminance.
[0021]
That is, when the surroundings are bright, the switch element SW1 for controlling the lighting load is kept off regardless of whether or not the human sensor 12 detects a person. On the other hand, the switch element SW2 for controlling the ventilation fan is turned on when a person is detected by the motion sensor 12, and is turned off when a specified time (for example, 5 minutes) elapses after the timed operation of the timer 10a ends. become. Here, the timed operation of the timer 10a is started from 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. The time from the end of the timed operation of the timer 10a until the switch element SW2 is turned off is fixedly set.
[0022]
When the surroundings are dark, the switch element SW1 for controlling the lighting load is turned on at the time when the human sensor 12 detects a person. After the switch element SW1 is turned on, the timer 10a is retriggered when a 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 stops the timed operation. continue. The switch element SW1 remains on while the timer 10a continues the timed operation. On the other hand, the switch element SW2 that controls the ventilation fan operates in the same manner as when the surroundings are bright, and when the switch element SW1 is turned on, the switch element SW2 is also turned on, and the switch element SW2 is turned off a specified time after the switch element SW1 is turned off. SW2 turns off.
[0023]
As described above, both ends of the switching element SW1, SW2 is a than from being connected to the output terminals T2, T3, dry contact output from the two output terminals T2, T3 is obtained, the output to the control terminal By connecting the terminals T2 and T3, it is possible to use an illumination load or a ventilation fan whose operating state changes according to the open / close state of a switch connected to the control terminal.
[0024]
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. Further, the switch element SW2 for controlling the ventilation fan is turned on from the time when a person is detected by the human sensor 12, but the time when the lighting load is turned off (that is, the time when the switch element SW1 is turned off). The switch element SW2 may be turned on only for a specified time from the time when the person leaves the room. Further, when a triac is used as the switch element SW1 for controlling the lighting load, a notice is given by lowering the light output of the lighting load L a predetermined time before the operation holding time ends (for example, 6 seconds before) (notice). Dimming) is also possible. When a person is detected by the human sensor 12 during the notice dimming, the state is switched to the rated lighting state again.
[0025]
(Second embodiment)
In the present embodiment, as shown in FIG. 2, a switch element SW1 for controlling a lighting load is inserted between a power supply terminal T1 and an output terminal T2. That is, a voltage contact output is obtained from the output terminal T2. Except for this point, it has the same configuration as the first embodiment.
[0026]
In the configuration of the present embodiment, a voltage contact output can be obtained for a lighting load, so that it is possible to save the construction just by connecting the lighting load to the output terminal T2. Further, since similarly dry contact outputs of the first embodiment for ventilating fan can be obtained, it is possible to correspond to the ventilation fan having a control terminal. Other configurations and operations are the same as those of the first embodiment. In this embodiment, a voltage contact output is obtained from the output terminal T2 corresponding to the lighting load. However, a voltage contact output is obtained from the output terminal T3 corresponding to the ventilation fan, and the output terminal T2 corresponding to the lighting load is obtained. , A non-voltage contact output may be obtained.
[0027]
【The invention's effect】
The invention according to 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 and from a toilet room based on an output of the human sensor. Control means for outputting a lighting control signal for lighting a lighting load during a period from entry of a person into the room to exit from the room, and outputting a ventilation fan control signal for operating a ventilation fan for at least a specified time from the exit of the person, and a lighting control signal. A first and a second switch element, each of which is controlled to be opened and closed by a ventilation fan control signal, and an output terminal to which both ends of at least one of the two switch elements are connected are provided on at least one of a lighting load and a ventilation fan. by connecting the output terminals with respect to being a control terminal for operation control by opening and closing the external contact, even that occur a dry contact output to the control terminal , And the control because it is possible to control giving dry contact output to the terminal, it is possible to ing to use those whose operation is controlled by opening and closing the external contact as the lighting load and ventilation fan.
[0028]
According to a second aspect of the present invention, in the first aspect of the present invention, both ends of both switch elements are respectively connected to different output terminals to generate a non-voltage contact output between both ends of each output terminal. For both the fan and the ventilation fan, it is possible to use the one whose operation is controlled by opening and closing external contacts, and the range of specifications that can be used for both the lighting load and the ventilation fan is widened.
[0030]
The invention of claim 3 is the invention of claim 1 or claim 2, one of the two switching element and the semiconductor switching element is obtained by the other electromagnetic relay, the invention of claim 4, claim 1 or In the invention of claim 2 , both switch elements are semiconductor switching elements, and in the invention of claim 5 , both switch elements are electromagnetic relays in the invention of claim 1 or claim 2. When a semiconductor switch is used, the on / off of the lighting load or the ventilation fan is repeatedly turned on and off at a high frequency while the duty ratio is controlled, so that the energy applied to the lighting load or the ventilation fan is adjusted, thereby dimming the lighting load. Control or control of the ventilation capacity of the ventilation fan becomes possible. Further, Ru can be on-resistance when using an electromagnetic relay is reduced smaller becomes exothermic and power loss than semiconductor switches.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of the present invention.
FIG. 2 is a block diagram showing a second embodiment of the present invention.
[Explanation of symbols]
10 Microcomputer 12 Human sensor SW1, SW2 Switch element T1 Power supply terminal T2, T3 Output terminal

Claims (5)

A human sensor that detects the presence or absence of a person by detecting heat rays radiated from the human body, and detects the entry and exit of a person into the toilet room by the output of the human sensor, A control means for outputting a lighting control signal for turning on a lighting load during a period until leaving the room, a control means for outputting a ventilation fan control signal for operating a ventilation fan for at least a specified time after the person leaves the room, and opening and closing the lighting control signal and the ventilation fan control signal, respectively. It has first and second switch elements to be controlled, and an output terminal to which both ends of at least one of the two switch elements are connected, and is provided on at least one of a lighting load and a ventilation fan and operates by opening and closing external contacts. by connecting the output terminal to the control for controlling the terminal, Toy characterized that you generate a dry contact output to the control terminal Use hot-wire automatic switch. 2. A hot-wire automatic switch for toilet according to claim 1, wherein both ends of said two switch elements are respectively connected to different output terminals to generate a non-voltage contact output between both ends of each output terminal. The hot wire automatic switch for toilet according to claim 1 or 2, wherein one of the two switch elements is a semiconductor switch element and the other is an electromagnetic relay . The hot wire automatic switch for toilet according to claim 1 or 2, wherein both the switch elements are semiconductor switch elements . Wherein both switches element together toilet hot-wire automatic switch of claim 1 or claim 2, wherein the is an electromagnetic relay.

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