JP2553515B2 - 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 control device that mixes high hot water and water to produce hot water of an appropriate temperature for use in a shower or the like.

2. Description of the Related Art Conventionally, there has been a mechanical automatic temperature control mixer using a wax thermostat, but no electronically controlled hot and cold water mixing device.

Problems to be Solved by the Invention In the wax thermo-type automatic temperature control mixer, when the set temperature during hot water is changed, a steady deviation occurs, and hot water at the set temperature cannot be supplied. In addition, when the flow rate is changed such as reducing the amount of hot water discharged or making a large amount of hot water, the supplied hot water temperature fluctuates and becomes cold or hot, which is very inconvenient. Furthermore, when hot water is repeatedly turned on and off like when washing hair, the temperature of the water around the wax thermometer becomes low during the stop, and the hot water side is opened arbitrarily and the water side is closed. Then, it falls into a very dangerous state of taking hot water.

The present invention has been made in view of the above points, and provides a convenient hot and cold water mixing control device that does not cause hot water temperature fluctuations or steady temperature deviations even when the set temperature or flow rate is changed. The purpose is to do.

Means for Solving the Problems To solve the above problems, a hot and cold water mixing control device of the present invention is provided with a hot water valve and a hot water valve for adjusting the hot water amount and the hot water amount, and the hot water valve and the hot water valve. A first driving means and a second driving means for urging, and a first temperature detecting means for detecting the temperature of the high-temperature hot water, which joins the hot water valve and the pipe to which the water valve is attached to form a mixing section. A hot water temperature detecting means for detecting the supply water temperature and the mixed hot water temperature; a hot water temperature setting means for setting the hot water mixing temperature; and a temperature deviation detecting means for obtaining a temperature deviation from the hot water temperature detecting means and the hot water temperature setting means. A flow rate detecting means for detecting the mixed flow rate, a flow rate setting means for setting the mixed flow rate, a flow rate deviation calculating means for obtaining a flow rate deviation from the mixed flow rate and the flow rate set value,
The mixing ratio is calculated from the supplied water temperature and the set hot water temperature detected by the temperature detecting means and the hot water temperature setting means and the supplied hot water temperature detected by the first temperature detecting means, and the first and second driving means are operated. And an urging amount calculation means for urging the flow rate deviation until it disappears while maintaining the set temperature so as to always eliminate the temperature deviation.

Action First, the water side valve is opened, the supply water temperature is obtained by the hot water temperature detecting means, and after the water temperature is obtained, the water side valve is closed. Next, the mixing ratio is calculated from the supplied hot water temperature detected by the first temperature detection means, the hot water temperature set value set by the hot water temperature setting means, and the previously supplied hot water temperature. The obtained mixing ratio is equal to the biasing amount ratio of the first and second driving means for biasing. Therefore, the optimum urging amount is calculated from the mixture ratio to urge the first and second driving means. Therefore, the water-side valve and the hot-water valve are opened according to the mixing ratio, so that the set hot water temperature can always be maintained.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
The figure shows an embodiment of the hot and cold water mixing control device of the present invention.

Reference numeral 1 is a water supply pipe, and 2 is a high temperature water supply pipe for supplying high temperature water from a heat source such as an oil boiler or an electric water heater. 3 is a water-side valve in the middle of the water supply pipe 1, 4 is a hot-side valve in the middle of the hot water supply pipe, and the water supply pipe 1 and the hot water supply pipe 2 merge further downstream to mix hot and cold water It becomes a pipe and goes out from the mixing outlet 5. Reference numeral 6 denotes a first drive means, which drives the water side valve 3 through the rotary linear motion conversion portion 7 to adjust the water amount.
Reference numeral 8 denotes a second drive means, which drives the hot water side valve 4 through the rotary linear motion converting portion 9 to adjust the hot water amount. Reference numeral 10 is a first temperature detecting means, which is attached in the middle of the hot water supply pipe 2 to measure the supply device. Reference numeral 11 denotes a hot water temperature detecting means which is installed in the middle of the mixing pipe to measure the hot water temperature and the supplied water temperature. 12 is a flow rate detecting means for measuring the mixed flow rate. 13 is hot water temperature setting means, which sets the mixed hot water temperature,
14 is a flow rate setting means for setting the mixing flow rate, that is, the amount of hot water discharged from the mixing outlet 5. Reference numeral 15 is a control device, to which the temperature signals of the first temperature detecting means 10 and the hot water temperature detecting means 11 are input, and the output parts of the hot water temperature setting means 13, the flow rate detecting means 12 and the flow rate setting means 14 are connected to obtain an optimum energizing force. The first and second drive means 6 for calculating the amount,
Output to 8. As the first and second driving means 6 and 8,
There are stepping motors, etc.

FIG. 2 shows an embodiment of the controller 15. The same parts as those in FIG. 1 are designated by the same reference numerals. Reference numeral 16 is a temperature deviation detecting means for obtaining the temperature deviation from the hot water temperature detecting means 11 and the hot water temperature setting means 13. Reference numeral 17 denotes a flow rate deviation detecting means, which inputs the flow rate detecting means 12 and the flow rate setting means 14 to obtain the flow rate deviation. 18 is a biasing amount calculating means, and the supply water temperature T _W of the supply water temperature T _H and the second hot water temperature detecting means 11 of the first temperature detecting means 10 detects, hot water temperature setting means
The optimum mixing ratio δ is obtained from the hot water temperature set value T _{S of} 13.

(Q _W ... supply amount of water, Q _H ... supply amount of hot water) The mixing ratio δ is equal to the ratio between the energizing amount F _W of the first driving means 6 and the energizing amount F _H of the second driving means 8. . Therefore, the urging amount is obtained from the mixture ratio δ, and the first and second driving means 6 and 8 are obtained.
Output to.

Next, the operation of the configuration of the present invention will be described. The hot water side valve 4 is closed, only the water side valve 3 is opened, the water temperature T _W is measured by the hot water temperature detection means 11, and the water temperature T _W is closed after the measurement is completed. Next, the mixing ratio δ (formula) is obtained from the supplied hot water temperature T _H measured by the first temperature detecting means 10 and the hot water temperature set value T _S set by the user. Next, the urging amounts of the mixing ratio δ of the first and second driving means 6 and 8 are calculated and obtained. That is, if δ = F _H / F _{W is} now set to F _W , then F _H = δ · F
_Find with _W. (F _W : Energizing amount of the first driving means, F _H : Energizing amount of the second driving means) With the energizing amounts F _W and F _{H found} next, the water side valve 3,
The hot water valve 4 is driven. Since the valve opening ratios of the water side valve 3 and the hot water side valve 4 are equal to the mixture ratio δ, the set hot water temperature value T _S is always obtained.

When the flow rate value obtained by the flow rate detecting means 12 becomes equal to the set flow rate, the driving of the water side valve 3 and the hot water side valve 4 is stopped. If the user changes the set hot water temperature T _S , the mixing ratio is calculated again, and the water side valve 3 and the hot water are heated with an urging amount corresponding to the mixing ratio until the output signal of the temperature deviation detecting means 16 becomes zero. Energize the side valve 4. When there is no temperature deviation, the driving of the water side valve 3 and the hot water side valve 4 is stopped.

In this way, by constantly measuring the supplied hot water temperature and the supplied water temperature, calculating the mixing ratio, and energizing the water side valve 3 and the hot water side valve 4, the mixed hot water and the set hot water temperature can be continuously maintained. Can be used comfortably, such as when using as a shower for washing hair.

Effects of the Invention As described above, according to the hot and cold water mixing control device of the present invention, the hot water temperature detecting means that shares the means for detecting the supply water temperature and the hot water mixing temperature, and the hot water temperature setting means that sets the hot water mixing temperature ,
A water-side valve and a hot-water valve for adjusting the amount of water and hot water, first and second driving means for urging the hot-water valve and the hot-water valve, a hot water temperature value of the hot water temperature setting means, and the hot water temperature. From a setting means and an urging amount calculating means for calculating a mixing ratio from the supplied water temperature and the supplied hot water temperature obtained from the first temperature detecting means to determine and output the urging amounts of the first and second driving means. Therefore, the first side and the second side are always urged so as to always eliminate the temperature deviation even if the hot water temperature fluctuates while keeping the optimum hot water amount at the preset flow rate. Since the driving means is energized, steady deviation does not occur, so there is no discomfort when using a shower or the like, and there is no need to use hot water even when the hot water is stopped again. ing.

[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, and FIG. 2 is a block diagram of the same. 3 ... water side valve, 4 ... hot water side valve, 6 ... first driving means,
8 ... second driving means, 10 ... first temperature detecting means, 11
...... Second temperature detecting means, 13 ...... Hot water temperature setting means, 18 ......
Energizing amount setting means.

Claims (1)

(57) [Claims] 1. A hot water side valve for adjusting the amount of hot water, a water side valve for adjusting the water amount, a first drive means for urging the hot water side valve, and a second drive for urging the water side valve. Means and first temperature detecting means for detecting the temperature of the hot water, and hot water for detecting only the supply water temperature in advance and detecting the hot water temperature of the mixture to which the hot water valve and the pipe to which the hot water valve is attached join. Temperature detecting means, hot water temperature setting means for setting the hot water temperature of the mixture portion, temperature deviation detecting means for obtaining a temperature deviation from the hot water temperature setting means and the hot water temperature detecting means, and flow rate detection for detecting a mixed flow rate. Means, a flow rate setting means for setting a mixed flow rate, a flow rate deviation detection means for obtaining a flow rate deviation from the mixed flow rate and the set flow rate, a hot water temperature set value set by the hot water temperature setting means, and the first hot water temperature setting value.
The amount of hot water and the mixing ratio of the amount of water are calculated from the supplied hot water temperature detected by the temperature detecting means and the supplied water temperature detected by the hot water temperature detecting means, and the urging amount is determined from the calculated mixing ratio to determine the first driving means. A hot and cold water mixing control device comprising: and a biasing amount calculation means for biasing the second driving means to adjust until the flow rate deviation disappears and to always bias the temperature deviation.