JPH07122835B2 - 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. 61-1824) 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. A controller 8 is connected to the controller 7 to set the hot water supply temperature, and the set temperature is input to the controller 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, the set temperature is reached. There was a drawback that the hot water that came out far away came 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. Therefore, the time for the hot water side valve 5 to pass through the closing margin is faster. 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 takes a shorter time to pass through the interference.

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 for adjusting the amount of water, a hot water side valve for adjusting the amount of hot water, and an energizing of the water side valve. Mixing means for setting a hot water temperature of a mixing portion for mixing water and hot water downstream of the water side valve and the hot water side valve, and a second driving means for urging the hot water side valve. Hot water temperature setting means, mixed hot water temperature detecting means for detecting the mixed hot water temperature, output signals of the mixed hot water temperature setting means and the mixed hot water temperature detecting means, and the first driving means and the second driving means. And a main control means for adjusting the mixed hot water temperature, and a tightening margin setting means for presetting the tightening allowance from the closed position of each valve of the water side valve and the hot water side valve to opening respectively. At the start of tapping, the first drive means and the second drive means are driven to It is provided with interference amount correction control means for performing feed control of interference amount from the closed position to the opening of the side valve and the hot water side valve.

Action At the start of hot water discharge, both the water side valve and the hot water side valve are set in advance by the interference setting means and the tightening margin from the closed position to the open position, which is specific to each valve, is determined by the first drive means and the second drive means. Drive in the opening direction by means. By this operation, both have reached the position immediately before opening at almost the same time. Then, from this position, the water side valve and the hot water side valve are opened with the biasing amount determined by the output amount of the main control means to discharge hot water.

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. First
The figure is a cross-sectional view of the hot and cold water mixing control apparatus of 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 denotes a control device, which urges the first drive means 15 and the second drive 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 mixed hot water temperature setting means. A biasing amount setting means 24 is provided for the first driving means 15 and the second driving means 15.
The urging amount of the driving means 17 is determined. Reference numeral 25 is a main control means for controlling the temperature of the mixed hot water, and 26 is a interference correction control means for correcting the interference portion of the valve when the hot water is closed.

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

In this embodiment, as the interference setting means, a memory, a switch, etc. are provided in the main control means in order to cope with variations in the interference portion due to manufacturing, aging and the like. The interference correction control means 26 performs the following operation using the value of the interference setting means.

At the start of tapping, the water side valve 12 and the hot water side valve 13 are driven by the interference correction control means 26 by the first driving means 15 and the second driving means 17, respectively. The region to be driven is the overlapping angle θ of the valves (the interference portion: FIG. 2) by the interference setting means. Water valve 12 and hot water valve 13
However, since both valves are opened by this θ, the energizing amounts of the water side valve 12 and the hot water side valve 13 are determined by the output of the main control means 25 for controlling the original mixed hot water temperature.

The contents of the interference setting means are closed during normal operation,
It is possible to update the contents one after another while improving the accuracy while repeating the opening, and to set it by initiative with a DIP switch or the like.

The main control means 25 detects a deviation between the set temperature set by the mixed hot water temperature setting means 23 and the hot water temperature detected by the mixed hot water temperature detecting means 18, and outputs a signal corresponding thereto to the urging amount setting means 24.

Therefore, after arranging 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 main control means 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 and the hot water side valve are opened by aligning the positions where the valves start to open and then by the biasing amount determined by the output amount of the main control means. Therefore, hot water can be supplied at the set temperature from the beginning of hot water.
In particular, when using a shower, the effect is safe and the usability is dramatically improved without producing cold water or hot water.

[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 mixed hot water temperature setting means for setting a hot water temperature of a mixing portion for mixing water and hot water downstream of the water side valve and the hot water side valve, and a mixed hot water temperature detecting means for detecting the mixed hot water temperature, Main control means for controlling the mixed hot water temperature by driving the first drive means and the second drive means with the output signals of the mixed hot water temperature setting means and the mixed hot water temperature detecting means, the water side valve and the A tightening margin setting means for setting in advance the tightening margins from the closed position of each valve of the hot water valve to the opening thereof, and driving the first driving means and the second driving means at the start of hot water discharge. , The feed control of the interference is performed until the water side valve and the hot water side valve are opened from the closed position. Hot and cold water mixing control apparatus that includes a correction control means white.