JPS6110184A - Hot water and water mixing control device - Google Patents

Abstract

PURPOSE:To always supply hot water at a set temperature stably by quickly operating driving means to move a mixing valve to the optimum position. CONSTITUTION:A deviation signal obtained by deviation detecting means 17 is compared with a set value of the first deviation setting means 18. When the deviation signal is larger, urging amount setting means 22 is set at the first urging amount, which is output to driving means 13. The driving means 13 is urged by the first urging amount to move a mixing valve at full speed to the optimum position through a cam. When the temperature deviation becomes smaller, the urging amount setting means 22 is set at the second urging amount, which is output to the driving means 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to obtain an appropriate temperature.

Structure of a conventional example and its problems FIG. 1 is a block diagram of a conventional hot water mixing control device. 1st
In the figure, a mixing valve 5 is located inside a valve frame 4 having a hot water inlet 1, a water inlet 2, and a mixing outlet 3. The mixing valve 5 has a hot water side valve body 6 and a water side valve body 7 whose positions are regulated at both inner ends by a shaft 8 and are urged inward by springs 9a and 9b.

A roller 10 is attached to the shaft 8 outside the valve body, and a cam 11 is attached to the shaft 8.
is in contact with The cam 11 is energized by a drive means 13 (for example, a nutenobbing motor, etc.) via a gearbox 12.

Reference numeral 14 denotes mixed water temperature detection means for detecting the water temperature at the mixing outlet 3, and mixed water temperature setting means 15 for setting the mixed water temperature, both of which are connected to a control device 16. Next, the control device 16 detects the deviation between the temperature set by the user using the mixed hot water temperature setting means 15 and the hot water temperature detected by the mixed hot water temperature detecting means 14. Control device 16
energizes the mixing valve 5 via the shaft 8 and moves it to a position where hot water at the set temperature can be supplied from the mixing outlet 3.

FIG. 2 shows a characteristic diagram of the control device 16. Temperature deviation is E□
(deg) or more, the driving means 13 is energized by the biasing amount F□(PP
energize with S). When the deviation becomes smaller than E□ (deg), the biasing amount of the driving means 13 is proportionally reduced.

The control device 16 proportionally controls the driving means 13 within a range of ±E□ (deg) with respect to the set temperature.

However, the above configuration had the following problems.

(1) When water pressure or hot water pressure changes suddenly in response to changes in water usage, the flow rate ratio of mixed water and hot water changes, causing a large overshoot or undershoot in the mixed hot water temperature.
It also affects the settling time for returning the mixed water to the set temperature. As a result, there was a danger that the hot water would suddenly become cold or hot while using it, making it difficult to use.

(2) If the required amount of hot water suddenly changes from the faucet installed downstream of the mixing outlet 3, the temperature of the mixed hot water will greatly overshoot or undershoot, making it extremely difficult to use and dangerous.

(3) The temperature of the hot water sent to the hot water bath [1] is not always constant, but varies depending on the heat source performance, and the mixed hot water temperature also fluctuates.

As a result, the hot water could become cold or hot during use, making it very inconvenient and dangerous to use.

Purpose of the Invention In view of the above-mentioned problems, the present invention has been developed to provide stable hot water at a set temperature even if the water pressure or hot water pressure suddenly changes, even if the amount of hot water suddenly changes at the faucet, or even if the temperature of the hot water to be mixed changes. The purpose of the present invention is to provide a hot water mixing control device that is easy to use and safe, and can supply hot water to customers.

Composition of the Invention In order to achieve this object, the hot water mixing control device of the present invention includes a mixing valve that adjusts the mixing ratio of hot water and water, a driving means that energizes the mixing valve, and a mixing controller that detects the temperature of the mixed water. A hot water temperature detecting means, a mixed hot water temperature setting means for setting a mixed hot water temperature, a deviation detecting means for determining a temperature deviation from the mixed hot water temperature detecting means and the mixed hot water temperature setting means, and an output signal of the deviation detecting means. first and second deviation setting means for setting a deviation value to be compared with the output of the deviation detection means 01J and the first deviation value 6iJ
and an energizing amount setting means for comparing the deviation setting value of the second deviation setting means and determining the energizing amount of the driving means.

Due to this structure, even if water temperature fluctuates due to fluctuations in water pressure or hot water pressure, or sudden changes in the amount of hot water dispensed from the faucet, the driving means will operate quickly and the mixing valve will be moved to the optimal position, without causing large overshoots or undershoots. That's what I do.

DESCRIPTION OF EMBODIMENTS FIG. 3 shows a configuration diagram of a hot water mixing control device in an embodiment of the present invention. In FIG. 3, the same numbers are given to the same parts as in FIG. 1.

17 is a (Ii difference detection means) to which the outputs of the mixed hot water temperature detection means 11 and the mixed hot water temperature setting means 15 are connected to obtain a temperature deviation.

Reference numerals 18 and 19 denote first and second deviation setting means, and the output section of the deviation detection means 1 and the first and second comparators 2o and 2
Connected to 1. First and second comparators 20.21
A judgment result signal between the output signal of the deviation detector TOKU 17 and the setting values of the first and second deviation settings/1st stage 18.19 is output from the output section to the energization amount setting means 22. 23 is a (-, -1 biasing circuit of the driving means 13) which transmits the biasing amount determined by the biasing amount setting means 22 to the driving means 13.

The operation of the hot water mixing control device configured as described above is explained in the fourth section.
This will be explained using figures.

FIG. 4 is a characteristic diagram of the control device of the present invention, showing the relationship between the temperature deviation and the amount of stingers in one drive stage. The deviation signal obtained by the deviation detection means 17 is compared with the set value "n4 of the first deviation setting means 18, and when the deviation signal is large, the energizing amount setting means 22
The biasing amount F1 is set to F1 and output to the driving means 13. The driving means 13 is biased by a first biasing amount F□, and moves the mixing valve 5 to the optimum position at full speed via the cam 11. When the temperature deviation between the tapped water temperature and the set temperature becomes smaller than the set value En1 of the first deviation setting means 18, the energizing amount setting means 22
The biasing amount F1 is set to F1 and output to the driving means 13. The mixing valve 5 has moved to a position where mixed hot water near the set temperature is dispensed, and the driving means 13 is energized with a second energizing amount smaller than the tenth energizing amount FQ in order to prevent it from going beyond the optimum position. Furthermore, the mixing valve 5 approaches the position where hot water near the set temperature is dispensed, and the temperature deviation reaches the set value En of the second deviation setting means 19.
If it is smaller than 2, the force setting means 22 is the driving means 1.
3, outputs a stop signal. Drive means 13 near the set temperature
By stopping the mixing valve 5, the mixing valve 5 is prevented from going beyond the optimum position, and the driving means 13 is prevented from moving due to flow noise.

For example, when a user significantly changes the set value of the mixed water temperature, it is necessary to quickly take out the desired hot water from the mixing outlet 3. That is, when the temperature deviation is large, the mixing valve 5 is brought close to the optimum position at full speed, and in order to prevent the control from going too far and causing a hunting state, the amount of energization of the driving means 13 is lowered to quickly bring the mixing valve 5 to the vicinity of the optimum position. ing.

By doing this, the user can use the device without feeling inconvenient or irritated by the fact that the desired hot water does not come out quickly even after changing the set temperature.

Furthermore, even if overshoot or undershoot occurs in the hot water temperature from the mixing outlet 3 due to sudden changes in water pressure due to sudden changes in water usage in each household, the mixing valve 5 can be quickly moved to the optimal position, resulting in a short settling time. This prevents the user from suddenly using hot or cold water.

Furthermore, fluctuations in hot water temperature due to fluctuations in hot water pressure or sudden changes in the amount of hot water dispensed from the faucet are also controlled in the same way.

Effects of the Invention As described above, according to the hot water mixing device of the present invention, the original water pressure or hot water pressure may fluctuate, the amount of hot water from the faucet may suddenly change, or the water temperature or hot water temperature may fluctuate. Or, even if a large temperature deviation occurs when changing the set temperature of the mixed hot water, if the driving means is energized with the 10th energizing amount to move the mixing valve to the optimum position at full speed, and the temperature deviation is reduced. In order to prevent the hunting phenomenon in which the mixing valve is moved too far or returned too far from the optimum position, the driving means is set to a second position.
When the temperature approaches the set temperature, the driving means is stopped and the temperature is stabilized to the set temperature in a short time without causing large overshoot or undershoot in the hot water temperature, allowing the user to set the temperature. It is safe and has excellent usability without causing irritation due to waiting too long for hot water, or dangerous or inconvenient situations such as suddenly using hot or cold water.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional hot water mixing control device, Fig. 2 is a characteristic diagram of the conventional same device, Fig. 3 is a sectional view showing a hot water mixing control device of an embodiment of the present invention, and Fig. 4 is a characteristic diagram of the same device. 5...Mixing valve, 13...Driving means, 14...Mixing #J hot water temperature output means, 15...Mixing hot water temperature setting means, 17...
...deviation detection means, 18.19...first and second 1
JIII difference setting means setting 2... Force amount setting means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4

Claims (2)

[Claims] (1) A mixing valve for adjusting the mixing ratio of hot water and water, a driving means for energizing the mixing valve, a mixing water temperature detecting means for detecting the mixed water temperature, and a mixing water temperature setting for setting the mixed water temperature. means and
a deviation detection means for determining a temperature deviation from the mixed water temperature detection means and the mixed water temperature setting means; first and second deviation setting means for setting a deviation value to be compared with an output signal of the deviation detection means; A hot water mixing control device comprising an energizing amount setting means for comparing the output of the deviation detecting means and the deviation setting values of the first and second deviation setting means to determine the amount of energizing of the driving means. (2) The biasing amount setting means sets the driving means to the first biasing amount when the deviation signal detected by the deviation detection means is greater than or equal to the set value of the first deviation setting means, and the biasing amount setting means sets the driving means to the first biasing amount, If it is equal to or greater than the set value of the second deviation setting means, which is smaller than the set value of the deviation setting means, the driving means is set to the second biasing amount, which is smaller than the first biasing amount, and the deviation signal is set by the second deviation setting means. 2. The hot water mixing control device according to claim 1, wherein the driving means is stopped when the temperature is below a set value.