JPH083491Y2 - Automatic flushing device for urinals - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The invention of this application is capable of forcibly closing the valve to stop water when power cannot be supplied from the main power source, and is normally used with an auxiliary power source. The present invention relates to an automatic flushing device for urinals.

[Conventional technology and its problems]

Conventionally, the urinals for men are washed by pushing the knob of the valve after use. In this type of urinal, it was not washed due to forgetting to push the knob, which gave the next user a feeling of filth. Under these circumstances, an automatic flushing device has been developed that detects the human body and automatically cleans the toilet bowl. Normally, the automatic water washing device controls the opening / closing operation of the valve by controlling the energization of the solenoid, and the solenoid is configured to be energized continuously for any operation period of the opening / closing of the valve. Therefore, there has been a problem that an automatic water washing device which is frequently used requires a large amount of electric power.

Recently, from the viewpoint of energy saving, a so-called keep solenoid, which is a solenoid that holds an open or closed state even when no electricity is supplied, has been used as a valve. However, in the keep solenoid structure, if the AC power source causes a power failure while spouting water, the valve remains held in the open state and is in the water spouting state.

In this way, when the rated power cannot be supplied to the keep solenoid due to a power failure, that is, when the power cannot be supplied, the valve charged from the water discharge to the water stop can be operated by the charge stored in the capacitor used for smoothing after rectifying the AC power. What you have done is known.

An apparatus of this type is proposed in, for example, Japanese Patent Laid-Open No. 1-206178.

However, this method requires a capacitor having a large capacity, cannot be used continuously during a power failure, and has a problem that the utilization efficiency of the urinal is reduced.

An object of the present invention is to provide an automatic flushing device in which a solenoid valve for supplying flush water for men's urinal is switched to an auxiliary power source to supply power when power cannot be supplied.

[Means for solving problems]

In order to achieve the above object, the flushing device for urinals of the present invention includes a solenoid valve provided in a flush water supply system,
A control unit that outputs a water discharge signal or a water stop signal based on the detection of a human body approaching the urinal, a valve drive unit that controls energization of the solenoid valve according to each of the signals, and a forced stop when power cannot be supplied. A water signal is output to the valve drive circuit, and a water shutoff command unit for forcibly closing the valve is provided.The water shut down command unit detects a voltage drop of the DC power supply voltage when power cannot be supplied, and the voltage Is composed of a voltage detection circuit that outputs a forced water stop signal when the voltage drops to a predetermined level.

[Action]

Normally, when a human body approaches the urinal, the control circuit operates to output a water discharge signal to the valve drive circuit, open the valve to discharge water, wash the water, and then send a water stop signal again from the control circuit. The output is output, the valve is closed to stop the water supply, and one cleaning cycle is completed. If a power failure such as a power outage occurs during water discharge, the main power supply is automatically switched to the auxiliary power supply, the valve is forcibly closed, and the flush function is stopped until the main power is restored. Or continue normal operation with auxiliary power supply.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the circuit configuration of the first embodiment of the automatic water washing apparatus of the present invention. .

The main power supply circuit 1 steps down AC100V with a transformer T, smoothes the direct current obtained by the rectifier circuit with a capacitor C, and supplies it to the control circuit 3.

The auxiliary power supply circuit 2 is composed of a secondary battery,
It is inserted in the power supply line between the main power supply circuit 1 and the control circuit 3. The secondary battery is charged by the main power supply at a normal time, and is connected to the power supply line via the parallel circuit of the resistor R and the diode D1 so as to act as the power supply of the control circuit when the main power supply is turned off.

The control circuit 3 outputs a water discharge signal or a water stop signal to the valve drive circuit 5 based on an input signal from a sensor 4 that detects a user standing in front of a male urinal.

The valve drive circuit 5 converts the power supplied from the main power supply or the auxiliary power supply into the respective operating voltages shown in FIG. 2 according to the water discharge signal or the water stop signal, and energizes the keep solenoid valve 6 only for a fixed time.

The keep solenoid valve 6 is configured to be kept energized for a certain period of time so that the state at that time is maintained after deenergization. For example, when a plus (+) voltage is applied, the valve is opened and a minus ( -) By applying a voltage so that the valve is closed, the water discharge or water stop state is maintained.

 Next, the operation of the first embodiment will be described.

When the user is detected, a water discharge signal is output from the control circuit to the valve drive circuit after a lapse of a predetermined time, and the keep solenoid is energized to open the valve only for a certain time, and water is flushed in the toilet bowl for cleaning. When there is no user, a water stop signal is output to the valve drive circuit, and a voltage opposite to the energizing voltage is applied to the keep solenoid for a certain period of time to close the valve and stop the water.

The above operation is usually performed by the main power supply of AC100V. During this time, a charging current flows to the secondary battery through the resistor R in the auxiliary power source.

At the time of power failure, power is supplied from the secondary battery to the control circuit through the diode D1, and the above operation is continuously performed.

It should be noted that a voltage detection circuit may be added, and the control circuit may have a forced water stop operation function of outputting a water stop signal once and closing the valve when a power failure is detected. In this case, the control circuit 3 forcibly closes the valve by switching from the main power source to the auxiliary power source and maintains this state until the main power source is restored, or causes the switched auxiliary power source to continue normal operation. It is configured with either of the functions.

FIG. 3 is a circuit configuration showing a second embodiment of an automatic water washing apparatus using a primary battery. Since the control circuit and the valve drive circuit have the same functions as in the first embodiment, a detailed description of the above parts will be omitted here.

The main power supply circuit 1 supplies power to the control circuit 3 through the diode D1.

The auxiliary power supply circuit 20 supplies power from the primary battery to the control circuit 3 via the transistor Tr and the diode D2 whose conduction is controlled by the voltage detection circuit 7.

When the voltage V of the main power supply falls below a predetermined level, the voltage detection circuit 7 outputs a low level, and a base current is passed through the transistor Tr to turn it on to connect the primary battery to the control circuit. At the same time, depending on the output level of the voltage detection circuit, the control circuit once outputs a water stop signal to the valve drive circuit to perform forced water stop as an initial operation when switching the power supply.

Here, the voltage detection circuit has an output that is an open collector, and a reference voltage V ₀ and a main power supply voltage V ₀ that are made by a voltage detection IC or a Zener diode in which the output turns to a low level when it turns on at a predetermined voltage or less. Compared with the divided voltage of V ₁ , V ₀ ＞ V ₁
When it becomes, it is composed of a comparator circuit whose output becomes low level.

Next, the power supply operation to the control circuit in the second embodiment will be described.

When the main power supply is normal, the output of the voltage detection circuit is at the high level, so the transistor Tr is in the OFF state, and power is not being supplied from the auxiliary power supply to the control circuit.

When the power supply from the main power supply is cut off due to a power failure, the output of the voltage detection circuit becomes low level, the transistor Tr becomes conductive, the power is supplied from the primary voltage, and then the washing operation is performed.

When the main power supply is restored, the output of the voltage detection circuit becomes high level and the normal operation is automatically restored.

In the second embodiment, the water washing operation is continuously performed even during a power failure, but the valve opening operation after the forced water shutoff operation can be prohibited until the main power is restored.
In the above embodiment, as shown in FIG. 2, the cleaning cycle is such that one water discharge and one water stop operation are performed for one use, but the present invention is not limited to this operation mode. It is not intended to be configured such that, for example, two cleaning cycles are performed for one use, that is, pre-cleaning is performed by detecting the human body, and post-cleaning is performed by detecting that the human body is separated from the urinal. You can also

[Effect of device]

As described above, according to the present invention, since the main power supply is automatically switched to the auxiliary power supply for backup in case of a power failure, the valve open state does not last long and the waste of water is eliminated. In addition, since it can be used with an auxiliary power source during a power failure, the flush function always works and the urinal can be kept clean.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a first embodiment of an automatic flush device for urinals of the present invention, FIG. 2 is a time chart showing energization of a keep solenoid in each operation mode, and FIG. 3 is another embodiment. It is a circuit block diagram. 1 ... Main power supply circuit, 2,20 ... Auxiliary power supply circuit, 3 ... Control circuit, 5 ... Valve drive circuit, 7 ... Voltage detection circuit.

Claims (1)

[Scope of utility model registration request] 1. A solenoid valve provided in a wash water supply system, a control unit for outputting a water discharge signal or a water stop signal based on detection of a human body approaching a urinal, and the control unit for outputting the signal according to each of the signals. A valve drive unit for controlling energization of the solenoid valve; and a water stop command unit for outputting a forced water stop signal to the valve drive circuit when power supply is impossible, forcibly closing the valve. Is an automatic flushing device for urinals, which is configured by a voltage detection circuit that detects a voltage drop of a DC power supply voltage when power cannot be supplied and outputs a forced water shutoff signal when the voltage drops to a predetermined level.