JP2995994B2 - Hot water supply control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water heater, mainly relates to hot water supply control apparatus for obtaining adjusting the optimum <br/> mixing hot water mixing ratio of hot water to obtain a suitable temperature using a mixer tap It is.

[0002]

2. Description of the Related Art Conventionally, this type of hot water supply apparatus is as shown in FIG. There is a mixing device main body 1 with a built-in thermostat and a tapping temperature setting handle 2 for obtaining mixed water at a set temperature from the shower head 3, and the discharge amount is adjusted by the handle 4.

[0003]

However, in the above configuration, if the tapping has been stopped for a long time, when the tapping is started next time, heat transfer occurs between the tapping water in the hot water supply means and the piping system. The temperature of the hot water initially discharged may be low because the temperature of the hot water staying at the shower head 3 due to heat radiation is lowered. At this time, if the flow rate is set close to full opening by shower or the like, the discharge of low-temperature hot water is suddenly taken, which is uncomfortable.

The present invention solves the above-mentioned conventional problems. The discharge flow rate is reduced for a certain period of time after the start of hot water supply, and the discharge flow rate is set after a time period for sufficiently discharging the hot water remaining from the hot water supply means to the discharge port elapses. It is a first object of the present invention to reduce the possibility of directly immersing hot water having different temperatures by supplying a flow rate which is set as described above.

Further, if the hot water supply means and the discharge port are separated from each other, even if the hot water temperature of the hot water supply means has reached an appropriate temperature, low-temperature hot water still stagnant at the discharge port may not be completely discharged. A second object of the present invention is to reduce the opening of the flow control on-off valve until the hot water temperature of the discharge port reaches a preset temperature,
It is to prevent hot water whose temperature is not stable immediately after tapping from being directly applied to the human body.

Further, when the shower hose is replaced, the distance from the hot water supply means to the discharge port changes, and the time at which the discharge port becomes the proper temperature after the hot water temperature of the hot water supply means becomes appropriate is different. A third object of the present invention is to set the approximate distance from the hot water supply means to the discharge port, thereby reducing the discharge flow rate until almost all of the accumulated water in the pipe comes out, and bathing unpleasant hot water on the human body. It is to avoid things.

[0007]

In order to solve the above-mentioned problems, a hot water supply control apparatus according to the present invention comprises a hot water supply means, a flow control opening / closing valve for adjusting a flow rate of the hot water supply means, and a flow control opening / closing valve. Setting means for setting the opening / closing and tapping flow rates; control means for controlling the flow rate control on / off valve; and a discharge port provided downstream of the flow rate control on / off valve. Hot water remaining from the hot water supply means to the discharge port after opening the control on-off valve
From the outlet until a certain period of time
In order to reduce the flow rate of hot water, the apparatus has a hot water initial control means for narrowing the opening of the flow rate control on-off valve.

According to another aspect of the present invention, there is provided a hot water supply control apparatus comprising: a hot water supply unit; a flow control opening / closing valve for adjusting a flow rate of the hot water supply unit; Setting means for setting the flow rate, discharge port hot water temperature detecting means for detecting the temperature of the hot water near the discharge port downstream of the weir hot water supply means, and control means for controlling the flow rate control opening and closing valve, wherein the control means After opening the flow control on-off valve by the signal of the setting means, it is configured to have a tapping initial relation means for reducing the opening degree of the flow control on-off valve until the signal of the discharge port hot water temperature detecting means reaches a preset value. It is.

In order to further achieve the third object, a hot water supply control apparatus according to the present invention comprises a hot water supply means, a flow control opening / closing valve for adjusting a flow rate of the hot water supply means, an opening / closing of the flow control opening / closing valve, and tapping. Setting means for setting a flow rate, pipe length setting means for setting a length to a discharge port which is downstream of the hot water supply means, and control means for controlling the flow rate adjusting on-off valve, wherein the control means is After the flow control on-off valve is opened by the signal of the setting means, the hot water supply initial control means for narrowing the opening of the time flow control on-off valve according to the signal of the pipe length setting means is provided.

[0010]

According to the present invention, with the above-described structure, the discharge flow rate is reduced until a certain time has elapsed after the start of tapping, and the hot water having different temperatures staying in the outflow passage immediately after tapping is prevented from being discharged at a large flow rate. It is.

Further, when the hot water supply means and the discharge port are separated from each other, the opening degree of the flow rate control opening and closing is reduced until the temperature of the discharge port reaches a preset temperature, and the temperature of the hot water whose temperature is not stable immediately after tapping is increased. This is to prevent it from being output at a flow rate.

Also, the discharge flow rate is reduced until the water remaining in the pipe is almost completely reduced by the signal of the pipe length setting means for setting the distance from the hot water supply means to the discharge port, and the human body is exposed to a large amount of unpleasant hot water. It is to be without.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a hot water supply control device. Hot water supply means 11 includes hot water flow path 5, water flow path 6, mixing valve 7 associated with each flow path, and mixing valve driving means 8 for driving mixing valve 7. It is composed of Reference numeral 9 denotes a flow control on / off valve, and reference numeral 10 denotes a flow control on / off valve driving unit 10 for driving the flow control on / off valve 9. 1
2 is a hot water temperature detecting means for detecting the hot water temperature downstream of the hot water supply means 11, 13 is a setting means for opening / closing a flow rate control opening / closing valve, setting a hot water flow rate and a hot water temperature of the hot water supply means, 14 is a control means, 1
5 is an outflow path of the hot water supply means, and 16 is a discharge port.

FIG. 2 shows an example of the control means 14. The signals from the hot water temperature detecting means 12 and the setting means 13 enter the hot water temperature controlling means 17 to calculate a control amount. Mixing valve driving means 8 according to the calculation result
, The mixing valve 7 is driven. Further, the flow control means 18 calculates a control amount in accordance with a signal from the setting means 13 and drives the flow control on-off valve 9 via the flow control on-off valve driving means 10 based on the calculation result. When a signal to start hot water is input to the hot water initial control means 19 by the setting means 13, a signal as to whether or not to reduce the flow rate is sent to the flow rate control means 18.

Next, the operation of the configuration of the present invention will be described. Usually, the flow control means 18 adjusts the flow control on-off valve 9 so that the amount of hot water matches the setting means by a signal from the setting means 13. The hot water temperature control means 17 receives the signal of the hot water temperature detecting means 12 and the signal of the setting means, and adjusts the mixing valve 7 so that the hot water temperature becomes a value set by the setting means.

However, when the hot water supply has been stopped for a long time, the hot water between the hot water supply means 11 and the discharge port 16 has been cooled. In this state, when the flow control means 18 which has received the hot water signal from the setting means opens the flow control on-off valve 9 from the beginning at the set flow rate, if a large flow rate is set, the tapping in the shower will be as shown in FIG. Hot water will come out. As described above, it is very uncomfortable to take a shower of hot water that is not at the set hot water temperature.

The means for preventing the above phenomenon will be described below with reference to FIGS. When the setting means 13 sends a signal to the control means 14 at time t1 in FIG. 4 so as to start tapping, like the signal x, the flow control means 18 inside the control means
Receives this signal and sends a signal to the flow control on / off valve driving means 10 to open the flow control on / off valve 9. At this time, the hot water discharge initial control means 19 inputs the setting means 13 and sets the flow rate as the signal y for a preset time (time during which the retained hot water from the outflow passage 15 to the discharge port 16 is completely discharged). It requests the flow rate control means 18 to make it Q1. At time t2 after a lapse of a fixed time, the tapping initial control means 19 cancels the request signal for decreasing the flow rate to the flow rate control means 18 as indicated by a signal y. With this signal, the flow control means 18
Is a flow control opening / closing valve 9 via a flow control opening / closing valve driving means 10 so that hot water is supplied at a flow rate (Q0) set by the setting means 13.
Open and close.

As described above, since the flow rate is reduced in the early stage of hot water supply, even if a shower or the like is connected to the discharge port 16, the flow rate is initially reduced as shown in FIG.
As shown in (a), there is no momentum, and during that time, the retained warm water staying in the pipe from the outflow passage 15 to the discharge port 16 is also pushed out. Therefore, even if the flow rate is changed to the set value and a vigorous shower comes out, unpleasant hot water does not scatter around, there is no danger of the human body being bathed, and a stable hot water temperature can be supplied.

Further, according to the stopping time, FIG.
Can be changed. FIG.
And FIG. When the setting means 13 sends a signal to the control means 14 to stop the tapping at time t1 like the signal x in FIG. 6A, the flow control means 18 closes the flow control on-off valve 9. At this time, the timer means 20 starts measuring the stop time in response to a signal from the setting means. Next, when the setting means 13 sends a signal to the control means 14 at time t2 as a signal x, such as a signal x, if the stop time from t1 to t2 is short, the temperature in the pipe downstream of the outflow passage 15 also drops significantly. When the tapping start signal is input from the setting means 13, the tapping initial control means 19 looks at the value of the timer means 20 as indicated by the signal y, and cancels the request to reduce the flow rate to Q1 immediately at time t3 as soon as time t3. Change from Q1 to Q0.

Conversely, if the stop time becomes longer to some extent, the temperature in the pipe downstream of the outflow passage 15 also deviates from the set temperature. Therefore, when a tapping start signal is input from the setting unit 13 at time t2 as in a signal x in FIG. 6B, the tapping initial control unit 19 responds to the value of the timer unit 20 that measures the time from time t1 to time t2. A time Δt1 at which the flow rate is reduced to Q1 is set, and during this time, the flow rate control means 18 is requested to reduce the flow rate as indicated by a signal y. As a result, the time during which the flow rate is reduced is changed depending on the time during which the apparatus is stopped, and the set flow rate (Q0) can be obtained immediately when stopping frequently, and when the apparatus is stopped for a long time, the water remaining in the piping is removed. The set flow rate can be obtained about after the extrusion.

Next, another embodiment of the present invention will be described below with reference to FIGS. After the start of hot water supply, even if the temperature of hot water in the vicinity of the hot water supply means 11 is at an appropriate temperature, the discharge port 16 may still have a large deviation and a lukewarm hot water temperature. Therefore, as shown in FIG. 7, a discharge port temperature detecting means 21 for directly detecting the temperature of the hot water near the discharge port 16 is provided.

At time t1 in FIG. 8, when the setting means 13 sends a signal to the control means 14 so as to start tapping, like a signal x, the flow control means 18 in the control means receives this signal and receives a flow control on / off valve. A signal is sent to the flow rate control on / off valve driving means 10 so as to open 9. At this time, the hot water outlet initial control means 19 inputs the signal of the setting means 13 and the signal of the discharge port hot water temperature detecting means 21. Until the signal of the discharge port hot water temperature detection means 21 reaches a preset temperature (within ΔT with respect to the temperature T set in FIG. 8), the flow rate control means reduces the flow rate to Q1 as indicated by a signal y. Request 18

For example, at time t2 in FIG. 8, the temperature detected by the hot water supply means 11 in the hot water supply means 11 already falls within ΔT as shown in FIG.
1 has not yet reached ΔT. Time t3
When the value of the signal from the discharge port hot water temperature detecting means 21 enters ΔT as shown in (b), the hot water temperature directly touched by the user becomes close to the set temperature, and the hot water discharge initial control means 19 outputs the signal y.
Release the request to reduce the flow rate as in. As a result, the temperature of the hot water in the pipe from the outflow passage 15 to the discharge port 16 is also close to the set temperature, so that when the flow rate is changed to the set value (Q0) and a vigorous shower comes out, the hot water temperature is already at the set temperature. The user can use the discharged hot water with ease.

Next, another embodiment will be described below with reference to FIGS. 9 and 10. FIG. As in the above-described embodiment, even after the start of hot water supply, even when the vicinity of the hot water supply means 11 is at an appropriate temperature, the discharge port 16 may still have a large deviation and a lukewarm water temperature. For this reason, as shown in FIG.
A pipe length setting means 22 for setting the pipe length up to is provided.
For example, it is a switch for setting the length of the shower hose. A description will be given below of the pipe length setting means 22 that can set two types of switching, that is, a long shower hose and a short shower hose.

In FIG. 10, at time t1, the control means 14 causes the setting means 13 to start tapping as indicated by a signal x.
To the flow control means 1 inside the control means.
8 receives this signal and sends a signal to the flow rate control on / off valve driving means 10 to open the flow rate control on / off valve 9. At this time, the tapping initial control means 19 receives the signal from the setting means 13 and the pipe length setting means 2
2 is input. If the signal from the pipe length setting means 22 is a short pipe, hot water staying in the pipe is discharged in a short time, so that the flow rate is controlled so as to reduce the flow rate to Q1 until time t2 as shown by a signal y. Requests means 18. At time t2, the tapping initial control means 19 cancels the request for reducing the flow rate as indicated by the signal y. The set flow rate is Q0 as shown in FIG.

If the signal from the pipe length setting means 22 is a long pipe, it takes a long time for the hot water staying in the pipe to be discharged. It requests the flow control means 18 to reduce the flow until t3. At time t3, tapping initial control means 19 cancels the request for reducing the flow rate as indicated by signal z. The set flow rate is Q0 as shown in FIG.

With this arrangement, since the set flow rate (Q0) is discharged at a set time so that the water remaining in the pipe from the outflow passage 15 to the discharge port 16 is completely discharged, the temperature of the hot water is close to the set temperature and the user is inexpensive. The discharge water can be used with care. Furthermore, in this method, since there is no need to newly provide a means (for example, a thermistor, etc.) for detecting the temperature of the hot water near the discharge port, only the pipe length setting means can be used.

[0028]

As described above, according to the hot water supply control apparatus of the present invention, the following effects can be obtained.

(1) When starting the hot water supply from the discharge port of the hot water supply means, the hot water supply means discharges water for a certain period immediately after the hot water supply.
The initial control means requests the flow rate control means to reduce the flow rate in order to sufficiently discharge the hot water remaining at the outlet.
Even when a shower head or the like is connected to the discharge port, there is initially no momentum, and during that time, the warm water that has stayed in the pipe from the outflow channel to the discharge port is also pushed out. Therefore, even if the flow rate is changed to the set value and a vigorous shower comes out, unpleasant hot water does not scatter around and the human body takes a bath
No problem occurs, and a stable hot water temperature can be supplied.

(2) When the hot water is started, the time for decreasing the flow rate immediately after the hot water is changed according to the stop time from the previous stop to the start of the current hot water .
When stopping frequently, the set flow rate can be obtained immediately, and when stopping for a long time, the set flow rate can be obtained as soon as the accumulated water in the pipe is pushed out. When the set flow rate is reached, the hot water temperature is stable, so that the supplied hot water can be used with confidence.

(3) When the hot water is started, the temperature of the signal from the discharge port hot water detecting means enters a preset value and then discharge is performed at the set flow rate. ing. Therefore, even when a shower tool or the like is connected to the discharge port, when the discharge starts vigorously, the accumulated water has already been discharged and the appropriate temperature is attained, so that it can be used comfortably.

(4) At the start of tapping, the tapping initial control unit controls the flow rate control unit so as to reduce the flow rate by a signal from the pipe length setting unit that sets the pipe length from the outflow passage to the discharge port. Therefore, when the piping is short, the flow rate is reduced for a short time, and when the piping is long, the flow rate is reduced for a long time. Then, since the set flow rate is discharged after the elapse of a sufficient time after drainage of the stagnant water in the pipe from the outflow passage to the discharge port, the hot water temperature is close to an appropriate temperature, so that the user can use the discharged hot water with ease. Further, it is not necessary to newly provide a means for detecting the temperature of the hot water near the discharge port, so that the number of parts is reduced and the apparatus can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a hot water supply control device of the present invention.

FIG. 2 is a control block diagram of the hot water supply control device.

FIG. 3 (a) is a diagram showing a small amount of hot water discharged by the hot water supply control device; FIG. 3 (b) is a diagram showing a large amount of hot water discharged by the device;

FIG. 4 is an output characteristic diagram at the start of tapping of the apparatus.

FIG. 5 is a control block diagram of a second embodiment of the apparatus.

FIG. 6 (a) is an output characteristic diagram at the start of tapping when the tapping stop time is short in the second embodiment of the apparatus; FIG. 6 (b) is a chart showing the output characteristic when tapping stop time is long in the second embodiment of the apparatus. Output characteristic diagram at the start of tapping

FIG. 7 is a control block diagram of a third embodiment of the device of the present invention.

FIG. 8 is an output characteristic diagram of the third embodiment of the apparatus of the present invention at the start of tapping.

FIG. 9 is a control block diagram of a fourth embodiment of the device of the present invention.

FIG. 10 is an output characteristic diagram at the start of hot water tapping according to a fourth embodiment of the present invention.

FIG. 11 is a configuration diagram of a conventional hot and cold water mixing control device.

[Explanation of symbols]

 9 Flow control on-off valve 11 Hot water supply means 12 Hot water temperature detecting means 13 Setting means 14 Control means 16 Discharge port 21 Discharge port hot water temperature detecting means

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Genmichi Kato 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (72) Inventor Yasuo Kidouchi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-62335 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) G05D 23/00-23/32

Claims (4)

(57) [Claims] 1. A hot water supply means, a flow control on / off valve for adjusting a flow rate of the hot water supply means, a setting means for opening / closing the flow control on / off valve and setting a flow rate of hot water, and controlling the flow control on / off valve. Control means, and a discharge port provided downstream of the flow control on / off valve, wherein the control means opens the flow control on / off valve in response to a signal from the setting means, and then controls the hot water supply.
Reduce the flow rate of hot water from the discharge port until a certain time elapses to sufficiently discharge the retained hot water from the stage to the discharge port.
Hot water supply control apparatus having a tapping initial control means to narrow the opening of the flow regulating shutoff valve for. The control means stops the tapping by the signal of the setting means and thereafter inputs the tapping start signal by the setting means.
2. A hot-water discharge initial control means comprising timer means for measuring the time, and opening the flow control on-off valve by setting means, and then reducing the opening of the flow control on-off valve by the value of the timer means. Hot water supply control device. 3. A hot water supply means, a flow control on / off valve for adjusting a flow rate of the hot water supply means, a setting means for opening / closing the flow control on / off valve and setting a flow rate of hot water, and a discharge port downstream of the hot water supply means. A discharge port temperature detecting means for detecting the temperature of the hot water near the outlet; and a control means for controlling the flow rate control on / off valve, wherein the control means opens the flow rate control on / off valve in response to a signal from the setting means, and then controls the discharge port. A hot water supply control device having a hot water supply initial control means for reducing an opening degree of a flow control on-off valve until a signal of a hot water temperature detecting means reaches a preset value. 4. A hot water supply means, a flow control on / off valve for adjusting a flow rate of the hot water supply means, a setting means for opening / closing the flow control on / off valve and setting a flow rate of hot water, and a downstream of the hot water supply means. A pipe length setting means for setting a length to a discharge port, and a control means for controlling the flow rate control on / off valve, wherein the control means opens the flow rate control on / off valve by a signal from the setting means, and then sets the pipe A hot-water supply control device having a hot-water supply initial control means for reducing an opening of a flow control on-off valve for a time corresponding to a signal from a length setting means.