JPH0814774B2 - Hot water mixing controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing controller for adjusting a mixing ratio of high temperature water and low temperature water to obtain an optimum mixed hot water temperature.

2. Description of the Related Art FIG. 4 is a block diagram of a conventional hot and cold water mixing controller. (For example, Japanese Utility Model Laid-Open No. 61-18424) 1 is a water supply pipe, 2 is a high temperature hot water supply pipe, and 3 is a mixed hot water outlet. Reference numeral 4 is a water side valve, and 5 is a hot water side valve. A thermistor 6 detects the temperature of the mixed hot water and notifies the hot water temperature signal to the controller 7. 8 is a controller connected to the control device 7,
This is for setting the hot water temperature, and the set temperature is input to the control device 7. The controller 7 operates the water side valve 4 and the water side valve 5 based on the temperature difference between the mixed hot water temperature signal detected by the thermistor 6 and the set temperature signal set by the controller 8 to control the temperature of the mixed water. Adjust.

However, in the hot and cold water mixing control device, the water side valve 4 and the hot water side valve 5 must be opened at the same time in order to obtain an appropriate mixed hot water temperature from the initial stage of hot water discharge, and if one valve is opened first, There was a drawback that hot water that was far away would come out.

Problems to be Solved by the Invention In the above-described configuration, the water-side valve 4 and the hot-water valve 5 are driven with an urging amount determined by the temperature difference between the set temperature and the mixed hot water temperature from the closed position before the start of hot water discharge. When opened, the time to pass through the interference to prevent water leakage when the valve is closed differs between the water side valve and the hot water side valve.

For example, when hot water is discharged, the hot side valve 5 operates faster than the water side valve 4 because the target temperature is reached earlier, so that the hot water side valve 5 has a shorter time to pass through the interference. On the contrary, when low-temperature hot water is discharged, the water side valve 4 operates faster than the hot water side valve 5, so that the water side valve 4 has a shorter time to pass through the tightening margin. If the water valve is opened early, cold water will come out of the mixed water outlet first, which causes discomfort during use. On the contrary, if the hot water valve opens early, hot water comes out of the mixed hot water outlet, which is very dangerous.

The present invention has been made in consideration of this drawback, and an object thereof is to provide a safe hot and cold water mixing control device.

Means for Solving the Problems In order to solve the above problems, the hot and cold water mixing control device of the present invention includes a water side valve, a hot water side valve, and first and second biasing the water side valve and the hot water side valve. Second flow rate detecting means, mixed hot water temperature detecting means for detecting the mixed hot water temperature, hot water temperature setting means, temperature deviation detecting means for detecting a temperature deviation from the mixed hot water temperature detecting means, and the hot water temperature setting means A closing position setting means for setting closing positions of the water side valve and the hot water side valve; a biasing amount setting means for setting biasing amounts of the first driving means and the second driving means; Until the side valve and the hot water side valve are driven and the flow rate detected by the flow rate detecting means changes, the output signal of the flow rate detecting means is given priority to the bias amount setting means over the output signal of the temperature deviation detecting means. Priority hand that urges the output hot water valve and the hot water valve at a constant speed It consists of steps.

Action At the start of tapping, both the water side valve and the hot water side valve set the angle θ, which is the closing margin (overlap angle) of the valve, from the closing position setting means provided in each valve to the first drive means and the second drive means. The driving means drives in the opening direction.

When there is no great variation in the mounting position of the closing position setting means, both valves reach the position immediately before opening at substantially the same time. When the output signal of the flow rate detection means changes in this state, it is judged that the valve has opened and hot water has started to flow, and from then on, the energizing amount setting means uses the water side valve and the hot water valve as a signal from the temperature deviation detection means. Adjust the drive amount of so that the hot water at the set temperature comes out.

In this case, since the two valves are opened almost at the same time, it is safe that cold water or hot water that greatly deviates from the set temperature does not come out immediately after tapping.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a hot and cold water mixing control device according to the present invention. Reference numeral 9 is a water supply pipe, 10 is a high temperature hot water supply pipe, and 11 is a mixed hot water outlet. 12 is a water valve, and 13 is a hot water valve. Water side valve 12 is the valve shaft
The first drive means 15 (for example, a motor) fixed to 14
More urged. Similarly, the hot water valve 13 is also fixed to the valve shaft 16,
It is energized by the second drive means 17. Reference numeral 18 denotes a mixed hot water temperature detecting means for detecting the mixed hot water temperature. Reference numeral 19 is a flow rate detecting means for detecting the amount of hot water discharged. Reference numeral 20 is a control device for urging the first driving means 15 and the second driving means 17. 21 and 22 are closing position setting means (for example, a micro switch).

 FIG. 2 shows the structures of the water valve 12 and the hot water valve 13.

FIG. 3 shows an example of the control device 20. Reference numeral 23 is a hot water temperature setting means. Reference numeral 24 is a flow rate setting means. Reference numeral 25 is a temperature deviation detection means for detecting a temperature deviation from the mixed hot water temperature detection means 18 and the hot water temperature setting means 23, and 26 is a flow rate deviation detection for detecting a flow rate deviation from the flow rate setting detection means 24 and the flow rate detection means 19. It is a means. 28 is a first drive means 15 and a second drive means 17
Is a biasing amount setting means for setting the biasing amount. Reference numeral 27 is a priority means for outputting the output signal of the flow rate detecting means 19 to the bias amount setting means preferentially over the output signals of the temperature deviation detecting means 25 and the flow rate deviation detecting means 26 at the start of tapping.

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

At the start of tapping, while the output signal of the flow rate detecting means 19 does not change, the priority means 27 does not use the signal of the temperature deviation detecting means 25, both valves are still operating in the interference part, and water and hot water start to flow. Therefore, the water side valve 12 and the hot water side valve 13 are driven at a constant speed by the first driving means 15 and the second driving means 17, respectively. Therefore, the water valve 12 and the hot water valve
13 is the valve overlap angle θ from the closing position setting means 21 and 22.
It rotates only (Fig. 2) and comes to the position where there is no overlap of valves. When the rotation angle of the valve becomes larger than θ, water and hot water flow out from the water side valve 12 and the hot water side valve 13. At this time, since the output signal of the flow rate detecting means is changed by the outflowing water and the hot water, it is detected that the water side valve 12 and the hot water side valve 13 are opened.

After that, in order to perform the original temperature control, the priority means 27 switches the priority of the signal of the flow rate detecting means 19 until the valve is opened to the output signal of the temperature deviation detecting means 23 or the flow rate deviation detecting means 24. Using this signal, the biasing amount setting means 28 determines the biasing amounts of the water side valve 12 and the hot water side valve 13.

Therefore, after aligning the positions where the valves are opened, the water side valve 12 and the hot water side valve 13 are opened with the biasing amount determined by the output amount of the temperature deviation detecting means 25 or the flow rate deviation detecting means 26 to start tapping.

For this reason, it is safe that cold water or hot water does not come out immediately after tapping.

As described above, according to the hot and cold water mixing control device of the present invention, the water side valve is adjusted by the urging amount determined by the output amount of the temperature deviation detection means or the flow rate deviation detection means after aligning the positions where the valves start to open. Since the hot water valve is opened, it is possible to supply hot water at the set hot water temperature from the beginning of hot water, and especially when using the shower, there is no cold or hot water coming out, and there is an effect that safety and usability are dramatically improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a hot and cold water mixing control apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a valve of the same apparatus, FIG. 3 is a control block diagram of the same apparatus, and FIG. 4 is a conventional hot and cold water mixing method. It is a block diagram of a control device. 12 …… Water side valve, 13 …… Hot water side valve, 18 …… Mixed hot water temperature detection means, 20 …… Control device.

Claims (1)

[Claims] 1. A water side valve for adjusting the amount of water, a water side valve for adjusting the amount of hot water, a first drive means for urging the water side valve, and a second drive for urging the water side valve. Means, a flow rate detecting means for detecting an amount of hot water discharged through the water side valve and the hot water side valve to be mixed, and a mixed hot water temperature detecting means for detecting a mixed hot water temperature,
Hot water temperature setting means, temperature deviation detecting means for detecting a temperature deviation from the mixed hot water temperature detecting means and the hot water temperature setting means, and a closing position setting means for setting closing positions of the water side valve and the hot water side valve, Energizing amount setting means for setting the energizing amounts of the first driving means and the second driving means, the water side valve and the hot water side valve are driven, and the flow rate detected by the flow rate detecting means changes. Until then, the output signal of the flow rate detecting means is output to the biasing amount setting means preferentially to the output signal of the temperature deviation detecting means to bias the hot water valve and the water valve at a constant speed. A hot water mixing controller.