JPS6319016A - Combination faucet controller - Google Patents

Abstract

PURPOSE:To eliminate a feeing of unpleasantness, and to heighten safety, by finding a combination ratio from a change gradient when the change gradient of temperature deviation is larger than a differential set value, and finding the energizing quantity ratio of a driving means. CONSTITUTION:A combination faucet controller is constituted of a supplying temperature estimating means 15, a combination ratio arithmetic means 16, the detecting means 17 of the temperature deviation and a proportional arithmetic means 18, the deciding means 20 of the change gradient (differential value) of the temperature deviation and a differential arithmetic means 21, an energizing quantity ratio arithmetic means 22 and an energizing quantity setting means 23, and a first and a second driving means 6 and 8. In this way, the control quantity is found by the proportional arithmetic means 18 so as to set the combination ratio at the optimum level, based on the temperature deviation between a set temperature, and a current supplying temperature, and when the previous stated differential value exceeds a prescribed value, the control quantity of the combination ratio is found by the differential arithmetic means 21. And the energizing quantity ratio between the first and the second driving means 6 and 8 is found from the above control quantity, and the combination ratio, then the energizing quantity is decided. As a result, it is possible to control a flow rate keeping the combination ratio at the optimum level.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device for mixing high temperature hot water and cold water to produce suitable temperature hot water for use in showers, washrooms, etc.

Conventional Technology In the past, there were mechanical automatic temperature control mixing faucets that used wax thermostats, but there was no electronically controlled hot water mixing control device.

Problem to be Solved by the Invention: Page 3 As shown in Figure 5, mechanical automatic temperature control mixing faucets using Wanox Thermo may cause a large overshoot in the hot water temperature when the set flow rate is changed, or conversely. Undershoot was occurring. Furthermore, when the set flow rate is changed, the water temperature becomes a constant deviation from the set temperature. In particular, when using a shower and changing the set flow rate, the shower suddenly overshoots with hot water or, conversely, with cold water, which can be extremely dangerous and uncomfortable.

The present invention was developed in view of this problem, and eliminates the risk of suddenly being immersed in hot water. Furthermore, it is an object of the present invention to provide a hot water mixing control device that is easy to use and does not cause the discomfort of bathing in cold water.

Means for Solving the Problems In order to solve the above problems, the hot water mixing control device of the present invention includes a water side valve and a hot water side valve that adjust the amount of water and hot water, and a hot water side valve that drives the water side valve and the hot water side valve. first and second driving means,
Water side pipes and hot water side pipes to which the water side valve and the hot water side valve are attached join further downstream to form a mixing section, and supply hot water temperature estimation for estimating the temperature of hot water supplied to the mixing section through the hot water side valve. a hot water temperature detecting means for detecting the temperature of the water supplied to the mixing section and the mixed hot water temperature; a hot water temperature setting means for setting the mixed hot water temperature; the supplied hot water temperature estimating means; and the hot water temperature detecting means. a mixture ratio calculating means for calculating a mixing ratio from the hot water temperature setting means; a deviation detecting means for calculating a temperature deviation from the hot water temperature detecting means and the hot water temperature setting means; a proportional calculation means for determining the adjustment amount of the mixing ratio calculation means; a differential value setting means for setting a change gradient of the temperature deviation; and a differential value setting means for determining the differential value of the temperature deviation and comparing it with the differential setting value of the differential value setting means. a value determining means, a differential calculating means for calculating an adjustment amount of the mixture ratio based on a differential value of the temperature deviation when the differential value of the temperature deviation is larger than a differential set value, the mixing ratio calculating means, the proportional calculating means, and the energizing amount ratio calculating means for calculating the energizing amount ratio of the first and second driving means from the differential calculating means; It consists of energizing amount setting means 5 to 7 for determining the energizing amount.

Consider the case where a user changes the set flow rate while using a shower, etc. The temperature of the hot water currently being tapped is the set temperature or less, and the flow rate is adjusted by opening or closing the water and hot water side valves. First, the amount of hot water and the mixing ratio of the amount of water are determined from the supplied hot water temperature estimating means, the hot water temperature detecting means, and the hot water temperature setting means. Based on the temperature deviation between the set temperature and the currently supplied hot water temperature, the adjustment amount is calculated using a proportional calculation means to obtain the optimum mixing ratio, and furthermore, the change gradient of the temperature deviation is greater than or equal to the set differential value. If so, the adjustment amount of the mixture ratio is determined by the differential calculation means based on the differential value of the temperature deviation, and the energization amount ratio of the first and second driving means is determined from the above adjustment amount and the mixture ratio. Next, the biasing amount is determined from the determined biasing amount ratio and output. In this way, the flow rate can be adjusted while maintaining the optimum mixing ratio. Even if the user changes the set flow rate while using the shower, he or she can use the shower comfortably without experiencing discomfort such as being hot or cold.

6 page Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of the hot water mixing control device of the present invention.

First, the present invention will be explained in detail.

In FIG. 1, 1 is a water side pipe, and 2 is a hot water side pipe that supplies high temperature water from a heat source. Reference numeral 3 denotes a water side valve, which is installed in the middle of the water side piping 1, and 4, a hot water side valve, is installed in the middle of the hot water side piping 2. The water side piping 1 and the hot water side piping 2 are joined further downstream to form a mixing section and become one piping, which is discharged through a mixing outlet 5 (such as a drain). 6 is a first driving means (for example, a stepping motor, etc.), which drives the water side valve 3 through a rotational linear motion converter 7.
to adjust the amount of water. 8 is a second driving means (for example, a stepping motor, etc.), which drives the hot water side valve 4 via the rotational linear motion converter 9 to adjust the amount of hot water. Numeral 10 is a hot water temperature detection means that detects the hot water temperature in the mixing section and inputs it to the control device 11 . 12 is a flow rate detection means that detects the mixed flow rate flowing into and out of the mixing section and inputs it to the control device. 13 is a hot water temperature setting means, and 147 to -7 is a flow rate setting means.

FIG. 2 shows an embodiment of the control device. Reference numeral 15 denotes a supplied hot water temperature estimating means, which estimates the temperature of hot water supplied to the hot water side valve 4 (il-through mixing section); 16 denotes a mixing ratio calculation means; the hot water temperature detecting means 1;
Supply water temperature Tw determined in advance at 0 and hot water temperature setting means 10
The hot water temperature set value T8 and the supplied hot water temperature T of the supplied hot water temperature estimating means 15
Find the mixing ratio from H. Reference numeral 17 denotes a deviation detecting means for determining a temperature deviation from the hot water temperature detecting means 10 and the hot water temperature setting means 13.

Reference numeral 18 denotes a proportional calculation means which calculates the adjustment amount of the mixture ratio calculated by the mixture ratio calculation means 16 in proportion to the temperature deviation calculated by the deviation detection means 17. Reference numeral 19 denotes a differential value setting means for setting a gradient of change in temperature deviation (i.e., a differential value). Reference numeral 20 denotes a differential value determining means, which determines the gradient of change in temperature deviation and compares it with the set differential value of the differential value determining means 20. If the difference is larger than the set differential value, the differential calculation means 21 calculates the adjustment amount of the mixing ratio from the differential value of the temperature deviation. Reference numeral 22 denotes an energizing amount ratio calculation means, which corrects the obtained mixture ratio by the above-mentioned adjustment amount to obtain an energizing amount ratio. Numeral 23 is a biasing amount setting means which determines and outputs the biasing amounts of the first and second drive means 6.8 from the biasing amount ratio determined by the biasing amount ratio calculation means 22.

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

Flow rate setting means 1 without changing the water temperature currently being used by the user
When an instruction to increase or decrease the flow rate is given by operating 4, the current mixing ratio DUO is first determined. The mixing ratio DUO't is determined from equation (1) from the water temperature Tw detected in advance by the hot water temperature detection means 10, the set hot water temperature T8, and the supplied hot water temperature TH estimated by the supplied hot water temperature estimating means 15.

T H-Ts are Pl, P2, P3, and P6 in the flowchart of FIG.

Next, set hot water temperature T8 and hot water temperature T. The temperature deviation En is calculated from The adjustment amount DU1 of the mixture ratio DUO, which is proportional to this temperature deviation En, is determined from equation (2).

DU10=C-En- (2) P4, P5, and P7 in the flowchart of FIG.

Next, the 9th page En differential value (□) of the temperature deviation En obtained by the deviation detection means 17 is obtained and compared with the set differential value Kref of the differential value setting means 19.

En ■□) In the case of Ktef t Find the adjustment amount of the mixing ratio based on the differential value of the temperature deviation En.

En DU11=C・□・・・・・・・・・(3) d[ These are P8 and P9 of the flowchart in FIG.

t The change in temperature deviation is gradual, and the amount of adjustment of the mixing ratio due to the gradient of change in temperature deviation is assumed to be O.

DU11=O (4) P8 and Plo in the flowchart of FIG. 3.

Next, the energizing amount ratio calculation means 22 corrects the mixture ratio DUO by the amount of adjustment of the mixing ratio to obtain the energizing amount ratio DU2.

DU2=DUO+DU10+DU11 ・・・・・・
(5) 10 l\/ This is the pH in the flowchart of Figure 3. There is a relationship between the biasing amounts of the first and second drive means 6.8 as Ul and U2. The biasing amount setting means 23 determines and outputs the biasing amounts U1 and U2 of the first and second drive means 6.8 from equation (6).

With the biasing amounts U1 and U2 determined in this way, the water side valve 3,
The hot water side valve 4 is driven to restrict the flow rate to the set flow rate, or to continue opening.

For example, when trying to increase the flow rate, if the water temperature decreases, the amount of adjustment of the mixing ratio is calculated using equations (2), (3), and (4) to eliminate temperature deviation, and equation 5) is used to calculate the optimal amount. Find the biasing amount ratio.

If there is no change in water temperature while changing the flow rate, the mixing ratio adjustment amount DU10=O1DU11=O becomes the mixing ratio D
UO is equal to the energizing amount ratio DU2. However, if the water temperature changes even slightly, the energizing amount ratio D will change depending on the speed of the water temperature change.
U2 is corrected, the valve opening is immediately corrected to 11 -/' to the position of the optimum ratio, and the hot water temperature is immediately corrected to the set temperature.

Effects of the Invention As described above, according to the hot water mixing control device of the present invention, a water side valve that adjusts the amount of water and hot water amount, a hot water side valve, and a first and second water side valve that drives the water side valve and hot water side valve. a driving means; the water side valve;
The water side piping to which the hot water side valve is attached joins downstream of the hot water side piping to form a mixing section, and includes a hot water temperature setting means for setting the hot water temperature in the mixing section and estimating the temperature of hot water flowing into the mixing section. a hot water temperature detecting means for detecting the temperature of water flowing into the mixing section and the temperature of the mixed hot water; the hot water temperature estimating means; the hot water temperature setting means; and the hot water temperature detecting means. a mixture ratio calculation means for calculating a mixture ratio from the hot water temperature detection means and the hot water temperature setting means; a deviation detection means for calculating a temperature deviation from the hot water temperature detection means and the hot water temperature setting means; and a deviation detection means for calculating an adjustment amount of the mixture ratio in proportion to the determined temperature deviation. a proportional calculation means, a differential calculation means for calculating the adjustment amount of the mixing ratio from the differential value of the temperature deviation when the change gradient of the temperature deviation is larger than the machine setting value, and the The user can By changing the set flow rate to an arbitrary set flow value, even if the water temperature starts to fluctuate, the optimal energizing amount ratio can be immediately determined, and even if the hot water temperature changes suddenly, the energizing amount ratio can be adjusted according to the differential value. By adjusting the hot water temperature according to your needs, you will not feel the discomfort of getting too hot or cold, and you will always be able to receive a stable supply of hot water without any steady-state deviations, making it extremely safe and easy to use. It's getting an effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hot water mixing control device according to an embodiment of the present invention, FIG. 2 is a control block diagram of the device, FIG. 3 is a flowchart of the device, and FIG. 4 is a control result diagram of the device. , 5th
The figure is a control result diagram of a conventional hot water mixing control device. 3...Water side valve, 4...Hot water side valve, 6...
. . . 1st driving means, 8 . . . 2nd driving means, 10 . 15...
... Supply hot water temperature estimating means, 16... Mixing ratio calculation means, 17... Deviation detection means, 18...
・Proportional calculation means, 19...Differential value setting means, 2
0... Differential value determination means, 21... Differential calculation means, 22... Energy ratio calculation means, 23
... energizing amount setting means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
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Claims (1)

[Claims] a water side valve that adjusts the amount of water, a hot water side valve that adjusts the amount of hot water, first and second driving means that drive the water side valve and the hot water side valve, and the water side valve and the hot water side valve. The installed water side piping and hot water side piping merge further downstream to form a mixing section,
A supply hot water temperature estimating means for estimating the temperature of hot water flowing in through the hot water side valve, a hot water temperature detecting means for detecting the temperature of water flowing into the mixing section and the temperature of the mixed hot water, and a hot water temperature setting means for setting the hot water temperature of the mixing section. and,
Mixing ratio calculating means for calculating a mixing ratio between the supplied hot water temperature estimating means and the hot water temperature detecting means and the hot water temperature setting means; and a deviation detecting means for calculating a temperature deviation from the hot water temperature detecting means and the hot water temperature setting means. , proportional calculation means for determining the amount of adjustment of the mixing ratio proportional to the temperature deviation determined by the deviation detection means, differential value setting means for setting the change gradient of the deviation detection means, and temperature determined by the deviation detection means. differential value determining means for determining a differential value of the deviation and comparing it with the set value of the differential value setting means; and a temperature deviation when the differential value of the temperature deviation determined by the differential value determining means is larger than the set value of the differential value setting means. differential calculation means for determining the amount of adjustment of the mixture ratio based on the differential value of; and a biasing amount ratio of the first and second driving means from the mixture ratio calculation means, the proportional calculation means, and the differential calculation means. A hot water mixing control device comprising an energizing amount ratio calculation means for determining the energizing amount ratio, and an energizing amount setting means for determining the energizing amount from the determined energizing amount ratio.