JP2827352B2 - Hot water mixing control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing control apparatus which adjusts a mixing ratio of hot water and water to obtain an optimum mixed hot water temperature and changes a mixing flow rate.

2. Description of the Related Art Conventionally, this type of hot and cold water mixing apparatus is as shown in FIG.

In FIG. 5, 1 is a hot water flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in connection with each flow path. The automatic pressure regulating valve 3 includes a hot water side valve body 4 and a hot water side valve seat 5 for reducing the primary pressure PH1 of the hot water flow path 1, a water side valve body 6 for reducing the primary pressure PC1 of the water flow path 2, and a water side. It comprises a valve seat 7, a valve shaft 8 connecting the hot water side valve body 4 and the water side valve body 6, and a piston 9 which operates with a pressure difference between the primary pressure PH <b> 1 and the PC <b> 1 after decompression of hot water and water. Thus, even if the pressure of hot water or water changes suddenly, the automatic pressure regulating valve 3 moves at that pressure, and acts so that the secondary pressure PH2 of the hot water and water and PC2 are always kept equal. The mixing ratio of hot water and water is varied by moving the temperature control valve 12 energized by the motor 11 left and right to change the mixing temperature. Reference numeral 13 denotes a mixing portion of hot water and water. After mixing, hot water is discharged through a flow rate control opening / closing valve 14, and its temperature is detected by a mixed hot water temperature detecting means (for example, a thermistor) 15, and its flow rate is detected by a flow rate detecting The control means 18 energizes the motor 11 and the flow control on-off valve 14 to match the value of the design means 17.

When performing tapping with a change in the mixing flow rate in the hot and cold water mixing apparatus, the setting flow rate is set by the setting means 17, and the setting flow rate is changed over time.

The control means 18 varies the flow rate control on-off valve 14 so that the deviation between the flow rate detected by the flow rate detection means 16 and the set flow rate becomes zero,
Change the flow rate of hot water.

Since the set flow rate changes over time, the control means 18 constantly changes the flow rate control opening / closing valve 14 so that the deviation becomes zero, and as a result, the tapping flow rate changes over time.

However, in the above-described configuration, the flow rate cannot be changed at a high speed due to a time delay of the flow rate detecting means.

The present invention solves such a conventional problem.When a set mixing flow rate and a driving amount when the mixing flow rate is supplied are stored in advance and the flow rate is changed at high speed, the stored driving amount is used. The purpose is to operate the flow control on-off valve by switching over time.

Means for Solving the Problems In order to solve the above problems, a hot and cold water mixing control device of the present invention includes a hot water flow path and a water flow path, a mixing valve for adjusting flow rates of the hot water flow path and the water flow path, Mixing valve driving means for driving a valve, a flow control on / off valve for adjusting a mixing flow rate, flow control on / off valve driving means for driving the flow control on / off valve, flow detection means for detecting a mixing flow rate, and the flow control Control means for controlling the driving amount of the on-off valve driving means; setting means for setting at least one or more mixed flow rates; and a flow signal of the flow rate detecting means and a driving amount for the flow rate adjusting on-off valve driving means are stored as a pair. The control means sets the drive amount of the flow rate control on / off valve drive means to the mixed flow rate set by the setting means over a sufficiently longer time than the detection delay of the flow rate detection means. After storing in the storage means using the flow rate detection means, the drive amount stored in the plurality of storage means when the flow rate deviation between the setting means and the flow rate detection means is within a predetermined range. The apparatus has a main control means for switching at time intervals including a time faster than the detection delay of the flow rate detecting means.

According to the above configuration, when the mixing flow rate is changed at a high speed, the set mixing flow rate and the driving amount of the flow rate control on / off valve driving means are determined over a sufficiently long time than the detection delay of the flow rate detecting means and stored in the storage means. The driving amount stored in the plurality of storage means is switched at time intervals including a time faster than the detection delay of the flow rate detecting means to drive the mixing valve, thereby changing the flow rate at high speed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a hot and cold water mixing apparatus, and the same parts as those in FIG. 5 are denoted by the same reference numerals.

19 is a biasing means, and is a mixing valve formed by the automatic pressure regulating valve 3 and the biasing means 19.
Form 20. Reference numeral 21 denotes a driving unit that applies a variable bias force in opposition to the force of the urging unit 19. The driving means 21
A plunger 22 made of a magnetic material, and a coil 23 waterproof and insulated around the plunger 22;
23 is connected to the control means 18. Flow rate is flow rate detection means
Detect at 16. The flow control on / off valve 14 is adjusted via a flow control on / off valve driving means 24 by a signal from the control means 18.

FIG. 2 shows an example of the control means 18. The signals from the flow rate detecting means 16 and the setting means 17 enter the main control means 25 and calculate the control amount. The calculation result is sent to the drive amount setting means 26, and the drive amount set here is sent to the flow control on / off valve drive main body 24 to operate the flow control on / off valve 14. Further, the mixing flow rate detected by the flow rate detecting means 16 and the driving amount set by the driving amount setting means 26 at that time are stored in the first storage means 27-1 to the N-th storage means 27-N for each mixing flow rate. 28 is a timer means.

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

 First, the temperature adjustment will be described.

When a current is passed from the control means 18 to the coil 23, the plunger 22 made of a magnetic material applies a bias force to the valve shaft 8 according to Fleming's law. When the biasing force and the urging force of the urging means 19 are balanced, the automatic pressure regulating valve balances.

Therefore, the balance point of the automatic pressure regulating valve 3 can be moved by changing the current flowing through the coil 23.

For example, when the current is small, the force of the urging means 19 is stronger, so that the water-side valve body 6 opens more than the hot-water-side valve body 4, and the tapping temperature decreases.

When the current is increased, the plunger 22 is pushed out against the force of the urging means 19, so that the hot-water-side valve body 4 opens, and as a result, the hot-water tapping temperature increases.

In this way, the control means 18 inputs the signal of the mixed hot water temperature detecting means 15 and the signal of the setting means 17 to adjust the current flowing through the coil 23 so that the tap water temperature becomes the set temperature.

In a normal use state, when the water pressure fluctuates, the automatic pressure regulating valve 3 operates as in the conventional case, and if the pressure receiving areas of the hot water side valve element 4, the water side valve element 6, and the piston 9 are made equal, the secondary pressure PH
2 and PC2 maintain the state at the balance point by the urging means 19 and the variable bias means 20.

 Next, the flow rate adjustment will be described.

The flow control on / off valve driving means 24 changes the opening degree of the flow control on / off valve 14 in accordance with the drive amount signal from the control means 18 to adjust the flow rate.

At this time, the control means 18 adjusts the driving amount by inputting the signal of the flow rate detecting means 16 and the signal of the setting means 17 so that the mixed flow rate becomes the set flow rate.

At this time, when the mixing flow rate is changed at a high speed, if the drive amount is set based on the flow rate signal detected by the flow rate detection means 16 as in normal flow rate control, a cause such as detection delay of the flow rate detection means 16 may be caused. When the signal of the flow rate detecting means 16 reaches the flow rate set by the setting means 17, the actual mixed flow rate does not match the detected flow rate. For example, if the set flow rate is set to be larger than the current mixed flow rate, the signal of the flow rate detection means 16
When the flow rate set at 17 is reached, the actual mixed flow rate is larger than the set flow rate. Conversely, when the set flow rate is smaller than the current mixed flow rate, when the signal of the flow rate detecting means 16 becomes the flow rate set by the setting means 17, the actual mixed flow rate is smaller than the set flow rate. .

Means for preventing the above phenomenon will be described below. When changing the flow rate at high speed, the desired flow rate on the large flow rate side (point p in Fig. 3)
Is set by the setting means 17. The control means 18 changes the drive amount to the flow rate adjusting on / off valve driving means 24 so that the mixing flow rate becomes the set flow rate slowly at first by the input of the setting means 17. (Area in FIG. 3A) Flow rate detecting means at the time when the set flow rate and the tapping flow rate become equal and stable (point y in FIG. 3).
The 16 flow rate signals and the drive amount of the drive amount setting means 26 are stored in the first storage means 27-1. Similarly, the flow rate on the small flow rate side (point q in FIG. 3) is set by the setting means 17. The control means 18 changes the drive amount to the flow rate control on / off valve drive means 24 so that the mixing flow rate gradually becomes the set flow rate by the input of the setting means 17. (Region (b) of FIG. 3) The flow rate signal of the flow rate detecting means 16 and the driving amount of the driving amount setting means 26 at the time when the set flow rate and the tapping flow rate become equal and stabilized (point z in FIG. 3) are stored in the first storage. It is stored in the means 27-2.

Once the storage is performed in this way, after that, the amount of driving can be adjusted by the signal of the storage means 27 instead of the signal of the flow rate detection means 16, and the mixed flow rate can be changed at a high speed to supply hot water. (Third
At this time, the drive amount stored in the storage means 27 is switched to change the mixing flow rate, and a signal for switching is performed by, for example, the timer means 28. External setting means
It is also possible to switch using 17 or the like.

If the number of storage means is further increased, hot water can be discharged at two or more flow rates. For example, if the flow rates and the drive amounts at four points (p, q, r, s) are stored as in the area of FIG. 4 (a), the flow rate can be finely adjusted at high speed as in the area of FIG. 4 (b). The temperature of the mixed hot water can be changed.

Thereby, the flow rate can be set at multiple points, and the effect of fluctuation of the flow rate can be easily obtained by adjusting the flow rate, so that it is possible to supply the user with a mixed hot water having a comfortable quality.

When the shower is used, it is comfortable if the tap water is supplied at such a high flow rate.

Also, when the flow rate control opening / closing valve 14 is driven by the driving amount of the storage means 27 due to a disturbance (such as a pressure fluctuation or a change in the temperature entering the hot water flow path 1 or the water flow path 2) during tapping, the mixed flow rate is stored in the storage means 27. May deviate from the stored flow rate. For example, this is a case where the flow rate becomes larger than the flow rate at the point p in FIG. 3 or becomes smaller than the flow rate at the point q. At this time, although there is a detection delay, this phenomenon can be detected by the flow rate detecting means 16, and the tapping is stopped or the storage means is stored again in the storage means (third processing).
A safe tapping can be performed as shown in FIG.

Effect of the Invention As described above, the hot and cold water mixing control device of the present invention provides a hot water flow path and a water flow path, a mixing valve that adjusts the flow rates of the hot water flow path and the water flow path, and a mixing valve drive that drives the mixing valve. Means, a flow control on / off valve for controlling the mixing flow rate, a flow control on / off valve driving means for driving the flow control on / off valve, a flow detection means for detecting the mixing flow rate, and a driving amount of the flow control on / off valve driving means Control means for controlling the flow rate, a setting means for setting at least one or more mixing flow rates, and a plurality of storage means for storing a flow rate signal of the flow rate detection means and a driving amount to the flow rate control on / off valve driving means as a pair. The control means uses the flow rate detection means to determine the drive amount of the flow rate control opening / closing valve drive means which takes a sufficiently longer time than the detection delay of the flow rate detection means to reach the mixed flow rate set by the setting means. After storing in the storage means, when the flow rate deviation between the setting means and the flow rate detection means is within a predetermined range, the driving amounts stored in the plurality of storage means are calculated based on the detection delay of the flow rate detection means. It has a configuration having main control means for switching at time intervals including high-speed time, and when changing the mixing flow rate and tapping the hot water, the driving amount of the flow control on / off valve driving means which becomes the mixing flow rate set in advance by the setting means In order to determine the flow rate, it is necessary to take a sufficiently long time than the detection delay of the flow rate detection means to use the flow rate detection means to reliably determine the driving amount of the flow rate control on / off valve driving means to be the current mixed flow rate to be used, Is stored in the storage means. For this reason, it is possible to reliably store an accurate drive amount at the time of use.

Furthermore, when the control for switching the drive amount over time is performed, the flow rate control opening / closing valve is controlled by the drive amount stored in the storage unit without using the detection value of the flow rate detection unit. It is possible to quickly and safely obtain a change in the flow rate.

Further, even when the drive amount is controlled to change over time, the flow rate is detected by the flow rate detection means, so that when the difference between the set flow rate and the detected flow rate becomes large, the hot water supply is stopped or restarted. The storage means can be re-stored, so that no discomfort occurs and the storage means is safe.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a hot and cold water mixing control device according to one embodiment of the present invention, FIG. 2 is a control block diagram of the hot and cold water mixing device, FIG.
FIG. 4 is a characteristic diagram of the mixed hot water temperature of the apparatus, and FIG. 5 is a sectional view of a conventional hot water mixing control apparatus. 1 ... hot water flow path, 2 ... water flow path, 14 ... flow control on-off valve,
16 ... Flow detecting means, 18 ... Control means, 24 ... Flow regulating on / off valve driving means.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yukio Nagaoka 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-1-266453 (JP, A) JP-A-2-27410 (JP, A) JP-A-61-294519 (JP, A) JP-A-62-296210 (JP, A) ) Actually open 63-130806 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G05D 7/00-7 / 06,23 / 13 F16K 31/06

Claims (1)

(57) [Claims] 1. A hot water flow path and a water flow path, a mixing valve for adjusting a flow rate of the hot water flow path and the water flow path, a mixing valve driving means for driving the mixing valve, and a flow rate control opening and closing for adjusting a mixing flow rate A valve, a flow control on / off valve driving means for driving the flow control on / off valve, a flow detection means for detecting a mixed flow rate, a control means for controlling a driving amount of the flow control on / off valve driving means, Setting means for setting one or more, and a plurality of storage means for storing a pair of a flow rate signal of the flow rate detection means and a drive amount to the flow rate control opening / closing valve driving means, wherein the control means is provided for the flow rate detection means. After storing the drive amount of the flow rate adjusting on / off valve driving means to be the mixing flow rate set by the setting means over a sufficiently long time than the detection delay in the storage means using the flow rate detection means, the setting means and Before Main control for switching the driving amounts stored in the plurality of storage units at time intervals including a time faster than the detection delay of the flow detection unit when the flow deviation of the flow detection unit is within a predetermined range. A hot and cold water mixing control device having means.