JPH0814773B2 - Hot water mixing controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water mixing control device 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 side 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 at the start of tapping. 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 opens early, cold water will come out of the hot water outlet first, which will cause 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 driving means, mixed hot water detecting means for detecting a mixed hot water temperature, hot water detecting 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 the water A closing position setting means for setting closing positions of the side valve and the hot water valve, an urging amount setting means for setting urging amounts of the first driving means and the second driving means, the water side valve, and Until the mixed hot water temperature detected by the mixed hot water temperature detecting means changes, the output signal of the mixed hot water temperature detecting means is preferentially applied to the output signal of the temperature deviation detecting means. Output to the volume setting means to energize the hot water valve and the hot water valve at a constant speed It becomes a priority means to do.

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 mixed hot water temperature detecting 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 by the signal of the temperature deviation detecting means. Adjust the drive amount of the side valve so that 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 immediately after tapping does not come out.

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 is an example of the control device 30. 23 is a hot water temperature setting means,
Reference numeral 24 is a flow rate setting means. 25 is the mixed hot water temperature detecting means 18
And temperature deviation detecting means for detecting a temperature deviation from the hot water temperature setting means 23, 26 is the flow rate detecting means 24 and the flow rate setting means
It is a flow rate deviation detecting means for detecting the flow rate deviation from 19. 28
Is an urging amount setting means for setting the urging amounts of the first driving means 15 and the second driving means 17. Reference numeral 27 denotes a priority means for outputting the output signal of the mixed hot water temperature detection means 18 to the bias amount setting means preferentially over the output signals of the temperature deviation detection means 25 and the flow rate deviation detection means 26 at the start of tapping. is there.

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

At the start of tapping, while the output signal of the mixed hot water temperature detecting means 18 does not change, the priority means 27 does not use the signal of the temperature deviation detecting means 25, and both valves are still operating the interference part and water and hot water are Water side valve 12 and hot water side valve because they have not started to flow
13 is a first drive means 15 and a second drive means 17 respectively.
Driven at a constant speed. Therefore, the water side valve 12 and the hot water side valve 13 are rotated by the valve overlapping angle θ (FIG. 2) from the closing position setting means 21 and 22, and come to the position where the valve overlapping portion is eliminated. When it becomes larger than the rotation angle θ of the valve, 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 mixed hot water temperature detecting means changes due to the outflowing water and hot water, it is detected that the water side valve 12 and the hot water side valve 13 are open.

After that, in order to perform the original temperature control, the priority means 27 switches the priority from the signal of the mixed hot water temperature detection means 18 which has been prioritized until the valve is opened to the output signal of the temperature deviation detection means 23 or the flow rate deviation detection 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, 19 …… Flow rate 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 mixed hot water temperature detecting means for detecting a mixed hot water temperature, a hot water temperature setting means, a 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 the water side valve And a closing position setting means for setting a closing position of the hot water valve, a biasing amount setting means for setting biasing amounts of the first driving means and the second driving means, the water side valve and the hot water. Until the mixed hot water temperature detected by the mixed hot water temperature detecting means changes, the output signal of the mixed hot water temperature detecting means is preferentially set to the urging amount over the output signal of the temperature deviation detecting means. Hot water output to the means and priority means for urging the hot water valve and the hot water valve at a constant speed. Mixing controller.