JPS61149678A - Hot and cold water mixing control device - Google Patents

Abstract

PURPOSE:To obtain a hot and cold water mixing control device which is simple in constitution and has high safety by providing timer means for delaying the stoppage of control valve until the temperature of hot water reaches a set value. CONSTITUTION:There are provided the second hot water temperature set means 17 for setting the temperature of hot water compared with an output value of the first hot water temperature set means 12, and comparison means 18 for comparing output signals of the set means 12, 17, and outputting an output signal of the second hot water temperature set means 17 to deviation detection means 14 when the output signals do not match each other. Further, there are provided the second driving means 10 for urging a control valve 8 and the second urging amount set means 16 for setting the urging amount of the driving means 10. Further, there is provided timer means 19 which is started in response to an output signal of stop operation means 13A and adapted to delay the stoppage of the control valve 8 until the temperature of hot water reaches a set value of the second hot water temperature set means 17.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to obtain an appropriate temperature.

2. Description of the Related Art Conventionally, this type of hot water mixing control device is shown in FIGS. 2 and 3. Figure 2 shows the overall system diagram. 1 is a water inlet, 2 is an inlet, and 3 is a mixing outlet. 4 is a mixing valve that changes the hot water mixing ratio and adjusts the mixed water temperature.

5 is a first linear rotational motion converter, and a first drive means 6 (
For example, the driving force of a motor, etc.) is converted into linear motion. Reference numeral 7 is a mixed hot water temperature detection means that detects the temperature of the hot water. Reference numeral 8 denotes a flow rate control valve that controls and shuts off the amount of hot water. Reference numeral 9 denotes a second linear rotational motion converter, which converts the rotational driving force of the second drive means 1o into linear motion. Reference numeral 11 denotes a control section, which includes mixed hot water temperature setting means 12 and operating means 13 for instructing to start or stop hot water pouring. The control section 11 is shown in FIG.

In FIG. 2, person 13- outputs an instruction signal to stop the hot water supply using the stop operation means. 14 is a deviation detection means for detecting temperature deviation. , 16 is a first biasing amount setting means that sets the biasing amount of the first drive means 6 that biases the mixing valve 4. 16 is the second
The biasing amount of the second drive means 10 that biases the flow rate control valve 8 is set by the zero biasing amount setting means.

Next, the operation will be explained. In order to open the flow control valve 8 and dispense hot water at the temperature set by the mixed hot water temperature setting means 12, a temperature deviation from the hot water temperature detected by the mixed hot water temperature detecting means 7 is detected. The amount of energization of the first drive means 6 is set and output according to the magnitude of the temperature deviation. The first driving means 6 drives the mixing valve 4 via the linear rotation motion converter 6 to change the mixing ratio of hot water and adjust the temperature of the hot water. When the user operates the stop operation means 13-me (for example, a switch, etc.), the second energizing amount setting means 16 outputs a signal to close the flow rate control valve 8, and the hot water supply is stopped.

The problem that the invention aims to solve However, the above configuration has the following problems.

Consider a case in which a user sets a high temperature, for example, about 80° C., using the mixed hot water temperature setting means 12 in order to pour hot water into a bath or the like.

In this state, if the user operates the stop operation means 13-m without lowering the set temperature to a low temperature, for example, a safe temperature of about 42°C, water at a high temperature of 80°C will remain in the piping. Next, when the user lowers the set temperature to about 42℃ and starts hot water again, if the hot water stoppage time is short, there will still be high-temperature water around 80℃ in the pipes, and if mixed hot water is used for Java etc. Exposure to the body may cause burns, blindness, or be life-threatening.

The present invention has been made in view of these points, and an object of the present invention is to provide a highly safe hot water mixing control device that has a simple configuration and does not use hot water.

Means for Solving the Problems In order to solve the above problems, the present invention provides a mixing valve, a first driving means for energizing the mixing valve, and setting the amount of energization of the first driving means. a tenth energizing amount setting means, a first hot water temperature setting means for setting the mixed hot water temperature, a second hot water temperature setting means to be compared with the output signal of the first hot water temperature setting means;
and a comparison means for comparing the output signals of the second hot water temperature setting means, a mixed hot water temperature detection means for detecting the mixed hot water temperature, and a temperature deviation from the mixed hot water temperature detection means and the first hot water temperature setting device. a deviation detection means for determining the start of hot water dispensing or It is comprised of a stop operation means that outputs a stop operation instruction signal, and a timer means that is activated when an output signal is output from the stop operation means.

Effect When the user operates the stop operation means to stop hot water dispensing, the mixing valve adjusts the hot water temperature so that it reaches the set value of the second hot water temperature setting means, regardless of the temperature value set by the first hot water temperature setting means. Adjust. The timer means is activated and the control valve remains open until the mixed water temperature reaches the second set water temperature value. Therefore, if hot water is present in the piping, the timer means delays the closing of the control valve until the hot water is completely discharged and the water temperature reaches a safe temperature. This allows users to use hot water at a safe temperature when refilling.

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a control block diagram of the hot water mixing control device of the present invention.

Components in FIG. 1 that are equivalent to those in FIGS. 2 and 3 are given the same numbers. In FIG. 1, 17 is a second hot water temperature setting means, which sets the temperature within a range that does not pose a danger to the human body. 18 is a comparison means which compares the first hot water temperature setting means 12 and the second hot water temperature setting means 17, and when the stop operation means 13-m is operated, the deviation detection means 14 is determined to be safe so as not to pose a danger to the human body. Outputs the water temperature value. Reference numeral 19 denotes a timer means which is activated by an output signal from the stop operation means 13-m to stop the second drive means 10 for a certain period of time.

Next, the operation of the configuration of the present invention will be explained.

The user sets the mixed water temperature using the first hot water temperature setting means 12. The mixing valve 4 is energized by the first driving means 6 so that there is no temperature deviation from the current mixed water temperature. For example, when hot water of about 80° C. is being dispensed and a person operates the stop operation means 13 to stop dispensing hot water, the timer means 19 and the comparison means 18 are activated. When the timer means 19 is activated, the closing of the control valve 8 is delayed for a certain period of time. In addition, the first hot water temperature setting means 12 and the second hot water temperature setting means 17 are compared with the first hot water temperature setting means 1.
8 and outputs the safe hot water temperature value to the deviation detection means 14.

Therefore, the first driving means 6 of the mixing valve 4 is activated depending on the deviation between the safe hot water temperature value and the current mixed hot water temperature. Therefore, the hot water temperature should be kept at a safe temperature.

The control valve 8 is opened by a timer means 19, and when the safe temperature is reached and the timer time of the timer means 19 has elapsed, the second drive means 10 is energized and the control valve 8 is closed.

The next time the user turns on the hot water again, the hot water can be used at a safe temperature, and the user can safely use it without putting the human body in a dangerous situation.

Effects of the Invention As described above, according to the hot water mixing control device of the present invention, even if the user operates to stop the hot water supply with the mixed hot water temperature set at a high temperature, the hot water temperature can be adjusted to a safe hot water temperature. By delaying the closing of the valve by a certain period of time using a timer means, it is extremely easy to use and achieves a high degree of safety.

[Brief explanation of drawings]

FIG. 1 is a control block diagram of a hot water mixing control device according to an embodiment of the present invention, FIG. 2 is an overall system diagram of a conventional hot water mixing control device, and FIG. 3 is a control block diagram of the conventional hot water mixing control device. 4...Mixing valve, 6...First driving means, 7...Mixing water temperature detection means, 8...Control valve, 1o... ...Second driving means, 12...
-1 hot water temperature setting means, 13-mu... stop operation means, 14... deviation detection means, 16...
...1fJ1 biasing amount setting means, 16...! 2
17...second hot water temperature setting means, 1B...comparison means, 19...timer means.

Claims (1)

[Claims] A mixing valve for adjusting the mixing ratio of hot water and water, a first driving means for energizing the mixing valve, a mixing water temperature detecting means for detecting the temperature of the mixed water, and a first hot water for setting the temperature of the mixed water. a temperature setting means; a deviation detection means for determining a temperature deviation from the mixed water temperature detection means and the mixed water temperature setting means; and an energizing amount of the first drive means is set by an output signal of the deviation detection means. 1st
energization amount setting means, second hot water temperature setting means for setting a hot water temperature to be compared with the output value of the first hot water temperature setting means, and output signals of the first and second hot water temperature setting means. a comparing means for comparing and outputting an output signal of the second hot water temperature setting means to the deviation detecting means when they do not match; a regulating valve for regulating the amount of mixed hot water dispensed; and a second driving means for energizing the regulating valve. a second energizing amount setting means for setting the energizing amount of the second driving means; a stop operation means for outputting a signal to stop hot water from the control valve; and an output signal of the stop operation means. and a timer means that is activated by the timer and delays the closing of the control valve until the hot water temperature reaches the set value of the second hot water temperature setting means.