JPH0799221B2 - 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. 5 is a block diagram of a conventional hot and cold water mixing controller.
(For example, Japanese Utility Model Laid-Open No. 61-18424) Reference numeral 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. 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, the controller 7 operates the water side valve 4 and the hot water side valve 5 to control the temperature of the mixed water. Adjust.

However, in the hot and cold water mixing control device, in order to obtain a hot water mixed at an appropriate temperature from the initial stage of hot water discharge, the water side valve 4 and the hot water side valve 5 must be simultaneously opened at a ratio suitable for the appropriate temperature.

At this time, it is difficult to obtain the above ratio unless the water temperature and the supplied hot water temperature are known, and if this ratio is not appropriate, hot water that is far from the set temperature will come out.

Problems to be Solved by the Invention With the above configuration, if the water valve is opened early at the start of tapping, cold water first comes out of the mixed hot water outlet, 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 to eliminate this drawback, and an object of the present invention is to provide a safe hot and cold water mixing control device by calculating the supplied hot water temperature by calculation.

Means for Solving the Problems In order to solve the above problems, a hot and cold water mixing control device of the present invention is an equalizing valve that operates in a direction to eliminate the pressure difference between water, a water side valve, and a hot water side. A valve, a first drive means for urging the water side valve, and a second drive means for urging the hot water side valve,
A water temperature detecting means for detecting a water temperature, a mixed hot water temperature detecting means for detecting a mixed hot water temperature, a water side valve opening degree detecting means for detecting the water side valve opening degree, and a hot water side valve opening degree Hot water side valve valve opening detecting means, hot water temperature calculating means for obtaining hot water temperature from outputs from the hot water valve opening degree detecting means and hot water valve opening degree detecting means, and the mixing The hot water temperature detecting means and the supplied hot water temperature calculating means are used as driving force setting means for driving the first driving means and the second driving means to adjust the mixed hot water temperature.

Action During hot water discharge or when hot water is stopped, the opening of the water valve and hot water valve is detected. Then, the supplied hot water temperature is calculated from the ratio of the valve opening.

The output amount of the main control means is determined by using the supplied hot water temperature obtained by this calculation, and the output amount is used to drive the first drive means and the second drive means to open the water side valve and the hot water side valve to discharge hot water. To do.

In this case, since it is possible to supply hot water at the set temperature immediately after tapping hot water, it is safe that cold water or hot water does not come out.

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 hot water temperature 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). Reference numeral 23 is hot water to be mixed, and an equalization valve that operates in a direction to eliminate the pressure difference between the water.

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. 24 is a mixed hot water temperature setting means. 25 water-side valve opening detection means (theta _W detecting means) for detecting the valve opening degree of the water-side valve 12 (abbreviated hereinafter theta _W) is 26 abbreviated valve opening degree (hereinafter theta _H of the hot water side valve 13 ) For detecting the hot water valve opening degree (θ _H detection means). Reference numeral 27 is a temperature deviation detecting means for detecting a temperature deviation from the mixed hot water temperature detecting means 18 and the mixed hot water temperature setting means 24. Reference _numeral 28 denotes a supply hot water temperature calculating means for calculating the supply hot water temperature from the θ _W detecting means 25 and the θ _H detecting means 26. Reference numeral 29 is an urging amount setting means for determining the urging amounts of the first driving means 15 and the second driving means 17 from the temperature deviation detecting means 27 and the supplied hot water temperature calculating means 28.

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

In this embodiment, as the water temperature detecting means, the water side valve 12 is first driven by the first driving means 15 and the mixed hot water temperature detecting means 18 detects the water temperature only at the start of the first hot water discharge. After detecting the water temperature, the hot water valve 13 is also driven by the second driving means 17 to supply hot water at the set temperature.

When hot water is being supplied at the set temperature, the valve opening and the flow rate are in a proportional relationship above the flow rate at which the equalization valve can operate. (4th
Therefore, the ratio of the amount of water in the mixed hot water to the amount of hot water is the ratio between the valve opening degree θ _W of the water side valve 12 and the valve opening degree θ _H of the hot water side valve 13.

Here, when the water temperature is T _W , the hot water supply temperature is T _H , the set temperature is T _S , the water amount is Q _W , the hot water supply amount is Q _H , and the hot water discharge amount is Q _S , the following relationships are established.

T _H Q _H + T _W Q _W = T _S Q _S (1) Here, Q _S can be expressed as follows.

Q _S = Q _H + Q _W (2) From the relationship between Eqs. (1) and (2), Q _H / Q _W is as follows.

When the flow rate ratio Q _H / Q _{W is set} to W, the equation (4) is established from the relationship of FIG.

Therefore, the supply temperature T _H can be expressed by the equation (5) from the equations (3) and (4).

Therefore, when hot water is being supplied at the set temperature, the water valve opening θ
_W is detected by the θ _W detection means 25, and the hot water valve opening θ _H is detected by the θ _H detection means 26, and then the supplied hot water temperature calculation means 28 uses the θ _W and θ _H (4), It is possible to obtain the supply temperature T _H by calculating the equation (5).

By substituting the supplied hot water temperature into the equation (3), the flow rate ratio W at an arbitrary set temperature can be obtained.

Therefore, at the start of tapping, at the flow rate ratio W, the water side valve 12 and the hot water side valve are
If 13 is opened, hot water can be supplied at the set temperature immediately after tapping.

As described above, according to the hot and cold water mixing control device of the present invention, the mixed hot water temperature is obtained, and the water temperature can be obtained, for example, by using the mixed hot water temperature detecting means or by using the estimated value. The supplied hot water temperature can be calculated.

Since the mixing ratio can be accurately calculated by using these values, hot water can be supplied at an arbitrary set temperature from the initial stage of hot water discharge.

In particular, when using the shower, it is possible to obtain a safety and usability that is drastically improved without generating cold water or hot water that is different from the set temperature.

[Brief description of drawings]

FIG. 1 is a sectional view of a hot and cold water mixing controller according to an embodiment of the present invention, FIGS. 2a and 2b are plan and front views of a valve of the hot and cold water mixing controller, and FIG. 3 is a view of the hot and cold water mixing controller. FIG. 4 is a control block diagram, FIG. 4 is a diagram showing an example of the relationship between the flow rate and valve opening of the hot and cold water mixing control device, and FIG. 5 is a block diagram of a conventional hot and cold water mixing control device. 12 …… Water side valve, 13 …… Bath side valve, 15 …… First drive means,
17 ... second driving means, 18 ... mixed hot water temperature detecting means, 25 ...
… Water side valve valve opening degree detecting means, 26 …… Hot water side valve valve opening degree detecting means, 29 …… Biasing amount setting means.

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-60-201173 (JP, A) JP-A-61-153423 (JP, A) JP-A-57-59211 (JP, A) JP-A-58- 129511 (JP, A) JP 60-249783 (JP, A) JP 61-109987 (JP, A)

Claims (1)

[Claims] Claim: What is claimed is: 1. An equalization valve that operates to eliminate the pressure difference between water and hot water, a water side valve that adjusts the amount of water, a hot water side valve that adjusts the amount of hot water, and a first biasing valve for the water side. 1, a second driving means for urging the hot water valve, a water temperature detecting means for detecting a water temperature, a mixed hot water temperature detecting means for detecting a mixed hot water temperature,
Water side valve valve opening degree detecting means for detecting the valve opening degree of the water side valve, hot water side valve valve opening degree detecting means for detecting the valve opening degree of the hot water side valve, and the water side valve valve opening degree detecting means Means and the supply hot water temperature calculation means for obtaining the supply hot water temperature based on the outputs from the hot water side valve valve opening detection means, and the first drive using the signals of the mixed hot water temperature detection means and the supply hot water temperature calculation means. Means and a biasing amount setting means for driving the second driving means to adjust the temperature of the mixed hot water.