JPH03181721A - Apparatus for hot water supply - Google Patents

Abstract

PURPOSE:To increase safeness and responsiveness and to simplify operation for remote control of start and stop of hot water supply and setting temporary flow amount of hot water to be supplied, by providing a controller which controls a control valve on the base of a set value of a flow amount setting and hot water supply commanding means and stops the drive of a driving means when hot water is not supplied. CONSTITUTION:When a flow amount setting and hot water supply commanding means 48 indicates the supply amount of hot water mixed with water, a hot water supply controller 23 controls a control valve 42 to open to let mixed water to flow out. The flow amount of the mixed water, detected by a flow amount detector 35, is controlled by the control valve 42 through a controller until it reaches a set value. The temperature of the mixed water, detected by a temperature detector 34 and represented in a signal, is compared with a temperature setting signal which is set by a hot water supply controller 23. On the base of the result of the comparison, a mixing valve 36 is driven by a motor 31 so that any difference between the signals can be eliminated. Further, when the control valve 42 closed to stop the hot water supply corresponding to the set flow amount 'zero', the flow amount detector 35 detects the interruption of the water flow, and then stops the drive of the motor 31 through the controller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water heater that is equipped with a mixing valve that mixes hot water and water and is capable of supplying hot water at a specified flow rate.

2. Description of the Related Art Conventionally, this type of water heater has been constructed as shown in FIG. That is, in FIG. 4, the valve shaft l is moved forward and backward by the drive of the servo motor 2. Reference numeral 3 denotes a double-sided valve on the hot water side that produces 1111 ff of high-temperature hot water, and the double-sided valve 3 on the hot water side is fixed to the tip of the valve shaft 1. 4 is a single-sided valve on the water side that controls the amount of cold water, and 3 is a double-sided valve on the hot water side.
A spring 5 is interposed between the valve stem 1 and the valve shaft 1, and is movable only in the direction of the double-sided valve 3 on the hot water side with respect to the valve shaft 1. Also,
6 is one hot water side seat formed at the outlet of the hot water supply path 8 in the hot water side valve chamber 7, and 9 is the other hot water side sheet formed in the hot water side valve chamber 7 opposite to the hot water side sheet 6. The hot water side seat 9 is also arranged between the hot water side valve chamber 7 and a mixing chamber 11 to be described later. The hot water side double-sided valve 3 is installed between these two hot water side seats 6.9, and as the valve shaft 1 moves forward and backward, the hot water side double-sided valve 3 is brought into contact with and separated from the two hot water side seats 6.9 in opposite directions. They are in a relationship, and the opening degree of each can be adjusted. 10 is a mixing chamber 11 that also serves as a water side valve chamber.
A water-side seat is formed at the outlet of the water supply channel 12 in the water-side seam 0, and the water-side single-sided valve 4 approaches and separates as the valve ring 1 moves forward and backward to change and adjust its opening degree. There is. Mixed hot water, which is a mixture of hot water and water, is supplied from a mixed hot water outlet path 13, and this mixed hot water outlet path 13 is provided with a hot water temperature sensing sensor 14. 15 is a hot water supply heat source machine.

The operation of this conventional example is to detect the mixed water temperature using the outlet hot water temperature sensor 14 and to operate the hot water side double-sided valve 3 using the servo motor 2 so that the hot water temperature set by a temperature setting device (not shown) can be obtained. The water-side single-sided valve 4 is driven to change the mixing ratio of hot water and water. When the mixed hot water temperature is lower than the set value, the valve stem 1 moves to the right side in the figure, and the water side single-sided pulp 4 narrows the water supply channel 12, and at the same time, the hot water side double-sided valve 3 opens the hot water supply channel 8. Move to the position where the set value can be obtained. If the mixed water temperature is higher than the set value, move in the opposite direction.

If the hot water heat source device 15 is an instantaneous type, if a large amount of hot water is dispensed, the heating cannot keep up, and if the temperature of the hot water drops below the set value even when the water is fully closed, the valve stem will move significantly to the right. , the hot water side double-sided valve 3 approaches the hot water side seat 9. As a result, the amount of water passing through the hot water heat source device 15 is regulated, and the hot water temperature can be obtained as per the set value. In addition, the mixed hot water was supplied and stopped manually using a faucet (not shown) provided at the terminal, and the flow rate was also adjusted using this faucet.

Problems to be Solved by the Invention Since this conventional water heater had a tank bottom as described above, it had the following problems.

(1) When the mixed hot water outlet path 13 cools down due to natural cooling when hot water supply is stopped, the hot water temperature sensor 14 detects this and the valve moves to increase the ratio of hot water, so that when hot water is reheated, the temporary It was dangerous because hot water would come out, and it took a long time to move to a position where the temperature was right.

(2) Because mixed hot water was supplied and stopped manually using a faucet, it was not possible to give instructions to start or stop hot water supply from a remote location, and it was also impossible to supply mixed hot water at an appropriate flow rate. Met.

In addition to the conventional examples mentioned above, there is also a Curran-type automatic mixing valve that uses the thermal expansion and contraction of wax to drive the valve and adjust the mixing ratio of hot water and water, and an automatic mixing valve that uses the mechanism of a tap water meter to drive the valve and adjust the mixing ratio of hot water and water. There was an automatic mixing metered water stop valve that was combined with a metered water stop valve that shut off water. However, problem (1) above is still unresolved, and issue a (2) above, which is that the bottom of the tank is mechanically complicated and cannot be remotely controlled, and the instantaneous flow rate value cannot be specified, has also been resolved. It had not been done.

The present invention provides a hot water supply device that solves these conventional problems, and is superior in safety and responsiveness, and simplifies operation by allowing remote control to start and stop hot water supply and setting the instantaneous flow rate value of hot water supply amount. The purpose is to provide a water heater that achieves the following.

Means for solving llR In order to achieve this object, the present invention provides a mixing valve for mixing hot water and water to obtain mixed hot water, a driving device for driving this mixing valve, and a control system for supplying, stopping, and flow rate of the mixed hot water. A flow rate setting device/hot water supply indicator that integrally combines a control valve that performs adjustment, a hot water supply instruction function that instructs the supply or stop of mixed hot water, and a flow rate setting function that sets the instantaneous flow rate value of mixed hot water, and this flow rate setting. The tank bottom is equipped with a controller that controls the control valve based on the settings of the water heater/hot water supply indicator, and also controls the drive device to stop driving when hot water supply is stopped.

Function: With the above tank bottom, the water heater of the present invention opens, closes, or adjusts the control valve based on the settings of the flow rate setting device and hot water supply indicator to supply, stop, and adjust the flow rate of mixed hot water.
When hot water supply is stopped, the mixing valve is stopped to prevent the mixing valve from opening on the hot water side due to natural cooling, simplifying operation and improving safety.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 3.

In FIG. 1, hot water produced by a hot water supply heat source device 16 is supplied to a hot water supply unit 18 through a hot water supply pipe 17.

A water supply pipe 19 is also connected to the hot water supply unit 18, and the mixed hot water is supplied to the bathtub 22 from the hot water supply port 21 through the mixing water pipe 20. A hot water supply controller 23 is provided near the hot water supply port 21 and is capable of setting the temperature, setting the instantaneous flow rate of the mixed hot water, and instructing the supply/stop of the mixed hot water. This hot water supply controller can be installed not only near the hot water supply opening of the bath, but also in the kitchen, housekeeping room, etc. Signals are exchanged between the hot water supply controller 23 and the controller 24 . The detailed configuration of the hot water supply unit for one day is shown in Fig. 2.The hot water and water supplied from the hot water inlet 25 and the water inlet 26 are mixed by adjusting the mixing ratio by the hot water side valve body 27 and the water side valve body 28. Hot water is supplied from the hot water outlet 29 to the hot water supply port 21 . Both ends of the hot water side valve body 27 and the water side valve body 28 are regulated by a valve shaft 30 and are biased by a spring in directions away from each other. 33. The mixed water temperature is detected by a temperature detector 34. Further, 35 is a flow rate detector, which is provided between the temperature detector 34 and the mixing valve 36, which is composed of a hot water side valve body 27, a water side valve body 28, a valve shaft 30, and the like. The flow rate detector 35 is composed of a fixed impeller 37 that swirls the flow, a ball 38 that rotates due to the swirling flow, a ball outflow prevention means 39, a magnetic resistance element 40 that detects the rotation of the ball, and a fixing means 41. . Mixing valve 3
Mixing of the hot water and water whose ratio has been adjusted in step 6 is promoted by the flow rate detector 35, and temperature fluctuations caused by insufficient mixing at the temperature detector 34 are eliminated. Signals from the flow rate detector 35 and temperature detector 34 are transmitted to the controller 24. A control valve 42 for supplying and stopping the mixed hot water and slightly controlling the instantaneous flow rate is controlled by a valve body 43, a shaft 44, a motor 45, a gear box 46, and the like. FIG. 3 shows details of the hot water supply controller 23. Temperature setting device 47 that sets the temperature, sets the instantaneous flow rate, and supplies/supplies mixed hot water.
It consists of a flow rate setting device and hot water supply indicator 48 that instructs to stop, a display section 49 that displays temperature or flow rate, and a switch 50 that selects which one to display. The flow rate setter/hot water supply indicator 48 can simultaneously stop and start hot water supply depending on whether the flow rate setting value is set to 0 or something else.

Next, the operation of this embodiment will be explained.

First, in the hot water supply controller 23, by instructing the amount of mixed hot water to be dispensed using the flow rate setting device and hot water supply indicator 48, the bottom of the control valve 42 is opened and the mixed hot water starts flowing out.

The flow rate of the mixed hot water is detected by a flow rate detector 35, and the control valve 42 is driven and controlled via the controller 24 until it reaches a set flow rate I. The controller 24 compares the temperature setting signal set by the hot water controller 23 and the mixed water temperature signal detected by the temperature detector 34, and the motor 31 moves the mixing valve to a position where the deviation between the two is zero. 36 is driven. When the flow rate setting is set to zero and the control valve 42 is closed to stop hot water supply, the flow rate detector 35 detects that the flow has stopped, and the drive of the motor 31 is stopped via the controller 24. Therefore, even if the temperature of the temperature detector 34 drops due to cooling after hot water supply is stopped, the mixing valve 36 does not open the hot water side and throttle the water side, as in the conventional case. Supply and stop of the hot water supply can be performed simply by operating the hot water supply controller 23, so there is no need to operate a faucet unlike in the past, making it possible to supply hot water at a fixed amount and remote control. In this embodiment, the flow rate setting device and hot water supply indicator 48 is configured in the shape of a lever as shown in FIG. It is also possible to use a method in which the flow rate increases or decreases each time the button is pressed.The important point is that the hot water supply can be started and stopped and the flow rate can be adjusted using one operation unit. By doing this, compared to starting and stopping hot water supply and adjusting the flow rate separately, the operation can be done only once at the same location, and the operation feeling is the same as that of a conventional faucet, making it easy for elderly and children to use. The advantage of this is that it prevents the risk of hot water splashing out if you forget to set the flow rate to a high flow rate and start water supply.

Further, although the motor 31 of the mixing valve 36 is stopped using the signal from the flow rate detector 35 in the above embodiment, the signal from the flow rate setting device/hot water supply indicator 48 may also be used directly.

Further, the flow rate can be adjusted using the control valve 42 without using the flow rate detector 35.
This may be done by adjusting the opening degree.

Furthermore, the signal from the temperature detector 34 may be used to throttle the control valve 42 to obtain the temperature when the flow rate is too high to obtain the set temperature.

Effects of the Invention As described above, the water heater of the present invention includes a mixing valve, a driving device that drives the mixing valve, a control valve that supplies, stops, and adjusts the flow rate of mixed hot water, and a horizontal supply instruction function. A control valve is controlled based on the settings of the flow rate setting device and hot water supply indicator, which has an integrated flow rate setting function, and the control stops the drive of the electric device when hot water supply stops. Since it is equipped with a controller that performs the following, it has the following effects.

(1) When hot water supply stops, the flow rate detector detects this and prevents the driving device from driving the mixing valve, so hot water does not come out temporarily like in the past when hot water is resupplied. It's safe. Further, since the mixing valve can be operated from the position where it was used last time, it takes less time to reach the position where the predetermined temperature can be obtained, and responsiveness is improved.

(2) Based on the settings of the flow rate setting device and hot water supply indicator, instructions can be given to start/stop hot water supply and flow rate adjustment from a remote location, and the flow rate ms can be set other than manually, increasing convenience and making operations easier. Become.

(3) The flow rate setting device and hot water supply indicator allows you to start/stop hot water supply and adjust the flow rate, so you only need to operate it once at the same location, and because you always select the flow rate value every time, you forget to set the flow rate, especially when supplying hot water. This eliminates the danger of discharging the same large flow rate as before when the machine is in use, further increasing convenience and safety.

[Brief explanation of drawings]

Fig. 1 is a diagram of a hot water supply system using a water heater according to an embodiment of the present invention, Fig. 2 is a partial sectional view of a hot water supply unit used in the same system, and Fig. 3 is a front view of a hot water supply controller used in the same system. FIG. 4 is a sectional view showing a conventional water heater. 23...Hot water controller (hot water supply indicator and flow rate setting device), 24...Controller, 31...
Motor (drive device), 36...Mixing valve, 42.
...Control valve.

Claims (1)

[Claims] A mixing valve that mixes hot water and water to obtain mixed hot water, a drive device that drives this mixing valve, a control valve that supplies and stops the mixed hot water and adjusts the flow rate, and a hot water supply instruction that instructs the supply and stop of the mixed hot water. a flow rate setting device/hot water supply indicator that integrally has a flow rate setting function for setting an instantaneous flow rate value of mixed hot water; and controlling the control valve based on the setting of the flow rate setting device/hot water supply indicator; A water heater comprising: a controller that controls the driving device to stop driving when hot water supply is stopped.