JPH0325085Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bath water flow control device useful for automatic bathtubs.

Conventionally, water level control devices for automatic bathtubs and the like have been equipped with a water level detection switch that detects when the water level in the bathtub has reached a predetermined height. Some are designed to maintain the water level below a predetermined height. However, such conventional systems have the disadvantage that it is difficult to change the water level. Furthermore, it is even more difficult to change the water level by remote control.

The present invention aims to eliminate the above-mentioned drawbacks, and will be specifically described below with reference to the illustrated embodiments.

The figure is a block circuit diagram of a water flow rate adjustment device for an automatic bath pot. 1 is a water supply channel, 2 is a solenoid valve interposed in the water supply channel 1, and 3 is a system that detects the water flow rate of the water supply channel 1. 4 is an integration circuit that calculates the amount of water supplied from the output of the flow rate detection means and the period during which the output is output; 5 is a set water amount signal corresponding to a predetermined amount of water supplied; 6 is a comparison circuit that compares the integration result of the integration circuit 4 with the set water volume signal and outputs a water supply stop command when the integration result exceeds the set water volume signal; 7 is the electromagnetic circuit that outputs the water supply stop command; This is a control circuit that controls opening and closing of the valve 2. The flow rate detection means 3 includes a rotary flowmeter 31 that outputs a frequency signal proportional to the flow rate, and an F-V converter that converts the output of the rotary flowmeter 31 into a flow rate signal consisting of a voltage signal proportional to the flow rate. It is composed of a converter 32. Further, the water amount setting circuit 5 includes a water amount setting adjusting means 51 made of a variable resistor for changing the signal value of the set water amount signal, and voltage dividing resistors 52 and 53 connected in series thereto.

Note that 8 is a reference water level detection switch (not shown) attached to the bathtub or inside the bathtub;
It is configured to turn on when the water level in the bathtub reaches a predetermined reference water level or higher, and the water level is set to a low level that does not overheat the heat exchanger of the bathtub. Also,
9 is a low water level prevention circuit that absorbs the positive input from the integration circuit 4 to the comparison circuit 6 until the reference water level detection switch 8 is turned on, and prevents the comparison circuit 6 from working. Specifically, it is composed of a buffer 91 and a diode 92. Reference numeral 10 denotes a reference water quantity detection circuit which outputs a water level warning signal when the quantity of water passing through the water supply channel 1 to the bathtub exceeds a reference water quantity at which the water level changes from a completely drained state to a reference water level.
Reference numeral 11 denotes an alarm drive circuit, which is configured to activate an alarm device (not shown) when a water level warning signal from the reference water amount detection circuit 10 is output. Furthermore, the integration circuit 4 is connected to a reference water level detection switch 8.
When the output is switched from off to on, its output is reset and the amount of water supplied from that point on is integrated, and when the integrated result exceeds a predetermined value, a water supply stop command is output to the control circuit 7. Ru.

The present invention thus constructed is operated by turning on the operation switch. That is,
First, the control device 7 outputs a valve opening command to the solenoid valve 2,
The solenoid valve 2 is opened and water supply is started. Simultaneously with the start of water supply, the integration circuit 4 starts integrating the amount of water supplied, and the integration result is input to the reference water amount detection circuit 10. If water supply is started when the water level in the bathtub is completely drained or below the standard water level with some hot water remaining, the water level rises to the standard water level and the standard water level detection switch 8 is turned on, causing the output of the integrating circuit 4 to be activated. will be reset. Simultaneously with this reset, calculation of the amount of water supplied above the standard water amount is started, and since the output of the buffer 91 becomes "high" in the low water level prevention circuit 9, the integration result of the integration circuit 4 is inputted into the comparison circuit 6. It becomes like this. However, the stopper of the bathtub was missing and it remained incomplete.
As the supplied water gradually drains out, the water supply amount exceeds the reference water amount without turning on the reference water level detection switch 8, so the reference water amount detection circuit 1
0 outputs a water level warning signal, the alarm drive circuit 11 is activated, the alarm device is activated, and the drain valve leakage is notified. When water is being supplied normally, when the water level in the bathtub further rises and exceeds the predetermined set water level, the integration result input from the integrating circuit 4 to the comparing circuit 6 exceeds the set water amount signal, and the comparing circuit 6
A water supply stop command is output from the solenoid valve 2, and the solenoid valve 2 is closed. By stopping the water supply in this way, the amount of water in the bathtub can always be kept constant when the water supply is completed, even if the remaining hot water has not been completely drained. In addition, alarm drive circuit 1
1 starts the alarm device, or at an appropriate time after the start, the control device 7 starts the solenoid valve 2.
It is preferable that the water supply be stopped by closing the valve.

As explained above, the present invention provides a flow rate detection means for detecting the water flow rate in a water supply channel with a solenoid valve interposed therebetween and outputting an electric signal corresponding to the water flow rate, and the output of the flow rate detection means and An integration circuit is installed to calculate the water supply route from the period during which the output is output.
Further, a variable water amount setting circuit is provided that outputs a set water amount signal corresponding to a predetermined water supply amount, and furthermore, when the integration result of the integration circuit and the set water amount signal are compared, and the integration result exceeds the set water amount signal, a control circuit that includes a comparison circuit that outputs a water supply stop command, inputs the water supply stop command, and closes the solenoid valve;
Since a reference water level detection switch is provided which causes the integration circuit to start integration when a predetermined reference water level in the bathtub is detected and outputs the integration result to the comparison circuit, the signal value of the set water volume signal output by the water volume setting circuit is The amount of water in the bathtub can be adjusted by simply changing the amount of water using the water amount setting adjustment means, and even if there is hot water remaining in the bathtub, the amount of water can be controlled to a preset constant level. In addition, this water volume setting circuit can be installed in a location far away from other parts as long as the set water volume signal can be transmitted to the comparison circuit.
By intervening various transmission means such as wireless electrical transmission and electrical transmission with optical transmission, the set amount of water can be easily changed by remote control.

[Brief explanation of the drawing]

The drawing is a block circuit diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Water supply channel, 2... Solenoid valve, 3... Flow rate detection means, 4... Integration circuit, 5... Water volume setting circuit, 6
... Comparison circuit, 7 ... Control circuit, 8 ... Reference water level detection switch.

Claims (1)

[Scope of utility model registration request] A flow rate detection means that detects the water flow rate and outputs an electric signal corresponding to the water flow rate is installed in the water supply channel with a solenoid valve interposed, and the water supply is determined based on the output of the flow rate detection means and the period during which the output is output. An integration circuit for calculating the amount of water is provided, and a variable water amount setting circuit is provided for outputting a set water amount signal corresponding to a predetermined amount of water supplied.
Furthermore, a comparison circuit is provided which compares the integration result of the integration circuit with a set water volume signal and outputs a water supply stop command when the integration result exceeds the set water volume signal, and inputs this water supply stop command to close the solenoid valve. A control circuit for controlling the valve, and a reference water level detection switch that starts integration in the integration circuit and outputs the integration result to a comparison circuit when a predetermined reference water level in the bathtub is detected. Water volume adjustment device.