JPH0615936B2 - Water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device that can mix hot water and water to obtain a set hot water temperature and supply hot water at an indicated flow rate.

Configuration of Conventional Example and Problems Thereof Conventionally, this type of hot water supply apparatus was configured as shown in FIG. That is, in FIG. 1, the valve shaft 1 is moved forward and backward by driving the servo motor 2. 3 is a hot water double-sided valve for adjusting the amount of hot water.
Is fixed to the tip of the valve shaft 1. Reference numeral 4 denotes a water-side single-side valve for adjusting the amount of cold water, and a spring 5 is interposed between the water-side double-side valve 3 and the valve shaft 1 so as to be movable only toward the hot-side double-side valve 3. . Further, 6 is one hot water side seat formed at the outlet of the hot water supply passage 8 in the hot water side valve chamber 7, and 9 is the other hot water side formed facing the hot water side seat 6 in the hot water side valve chamber 7. As the seat, the hot water side sheet 9 is disposed between the hot water side valve chamber 7 and a mixing chamber 11 described later.
The hot water double-sided valve 3 is provided between the two hot water side seats 6 and 9 and the forward / backward movement of the valve shaft 1 causes the hot water double side valve 3
Are in contact with and separated from each other on the two hot water side seats 6 and 9, and the respective opening degrees are adjusted. Reference numeral 10 denotes a water side sheet formed at the outlet of the water supply passage 12 in the mixing chamber 11 which also serves as the water side valve chamber.
At 0, the water-side one-side valve 4 is brought into and out of contact with the forward and backward movement of the valve shaft 1 to adjust the opening thereof.
The mixed hot water in which hot water and water are mixed is supplied from the mixed hot water take-out path 13, and a hot water temperature sensor 14 is provided in the mixed hot water take-out path 13. Reference numeral 15 is a hot water supply heat source machine.

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

If the hot water supply heat source device 15 is of the instantaneous type, if a large amount of hot water is discharged, the heating cannot catch up, and if the hot water temperature falls below the set value even when the water is fully closed, the valve shaft will move greatly 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 supply heat source device 15 is regulated, and the hot water temperature as set can be obtained. Further, the supply / stop of the mixed hot water was manually performed by a faucet (not shown) provided at the terminal, and the flow rate was also controlled by this faucet.

This conventional hot water supply apparatus has the following problems.

(1) Since there is no means for detecting whether hot water is being supplied or not, if the mixed hot water outlet 13 is cooled by natural cooling when hot water is stopped, the hot water temperature sensor 14 will detect this and the valve will turn off the hot water. To move to increase the ratio,
It is dangerous because hot water will come out temporarily when re-hot water is supplied.
It took time to move to the position where the optimum temperature was obtained.

(2) Since the flow rate of the mixed hot water was manually adjusted at the faucet, it was not possible to instruct to adjust the flow rate from a remote location, and it was impossible to supply the mixed hot water at an appropriate flow rate value. .

In addition to the above conventional example, the valve is driven by utilizing the thermal expansion and contraction of the wax to automatically stop using the Karan type automatic mixing valve that adjusts the mixing ratio of hot water and the mechanism of the water meter of the tap water. There was an automatic mixing metering stopcock that combined a metering valve to do the water. However, the above problem (1) has not been solved yet, and since it was mechanically configured, the structure is complicated and remote operation is not possible, and the above problem (2) that the instantaneous flow rate value cannot be specified is also solved. Didn't.

An object of the present invention is to provide a hot water supply apparatus that solves the above conventional problems, and an object of the present invention is to provide a hot water supply apparatus having excellent safety and responsiveness and capable of adjusting the instantaneous flow rate value of the hot water supply amount. There is.

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 the mixing valve, and a load when the mixing valve is driven. Buffer means, a temperature detector for detecting the mixed hot water temperature, a temperature setter for setting the mixed hot water temperature, a flow rate detector for detecting the mixed flow rate, and a flow rate setter for setting the instantaneous flow rate value of the mixed hot water. , A control valve for adjusting the instantaneous flow rate of the mixed hot water, the temperature detector and the signal of the temperature setter to control the drive unit to obtain an appropriate temperature, and the hot water is supplied using the signal of the flow detector. When not in operation, the hot water supply device is configured with a controller that stops the drive device and controls the control valve based on signals from the flow rate detector and the flow rate setter, and detects that the supply of the mixed hot water has stopped. Detected, and the drive of the drive device is stopped and started The control device controls the control valve by using the signal of the flow rate detector to detect the fact that the hot water supply is restarted, and confirms the safety when hot water is restarted and obtains the flow rate set by the flow rate setting device. It also achieves the purpose of improving responsiveness.

Description of Embodiments One embodiment of the present invention will be described with reference to FIGS.

In FIG. 2, hot water produced by the hot water supply heat source device 16 is supplied to the hot water supply unit 18 through the 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 that has been mixed passes through the mixed hot water pipe 20 and from the hot water supply port 21 to the bathtub 22.
Is supplied to. In the vicinity of the hot water supply port 21, there is provided a hot water supply controller 23 capable of setting a temperature, setting an instantaneous flow rate value of the mixed hot water, and instructing supply / stop of the mixed hot water. This hot water supply controller can be provided in, for example, a kitchen, a housekeeping room, etc. in addition to the vicinity of the hot water supply port of the bath. The exchange of signals from the hot water supply controller 23 is performed with the controller 24.
The detailed structure of the hot water supply unit 18 is shown in FIG. The hot water and the hot water supplied from the hot water inlet 25 and the hot water inlet 26 have their mixing ratios adjusted by the hot water valve 27 and the water valve 28, and are supplied from the hot water outlet 29 to the hot water supply port 21. Hot water valve 27
The water-side valve body 28 is provided in such a manner that both ends thereof are regulated by the valve shaft 30 and are separated from each other by a spring 30 'which also serves as a holding means for each valve body and a cushioning means at the time of contact with the valve seat. And is driven by a motor 31, which is a drive device, via a gear box 32 and a screw mechanism 33. The temperature of the mixed hot water is detected by the temperature detector 34. Reference numeral 35 denotes a flow rate detector, which is provided between the temperature detector 34 and the mixing valve 36 including the hot water valve body 27, the water valve body 28, the valve shaft 30, and the like. The flow rate detector 35 includes a fixed impeller 37 that swirls the flow, a ball 38 that rotates by a swirling flow, a ball outflow prevention unit 39, a magnetic resistance element 40 that detects the rotation of a hole, and a fixing unit 41. . Mixing valve 36
Mixing of the hot water and the water whose ratio has been adjusted by is promoted by the flow rate detector 35, and temperature fluctuation due to insufficient mixing in the temperature detector 34 is eliminated. The signals from the flow rate detector 35 and the temperature detector 34 are transmitted to the controller 24. Further, a control valve 4 for supplying / stopping the mixed hot water and controlling the instantaneous flow rate value.
2 is a valve body 43, a shaft 44, a motor 45, a gear box 4
It consists of 6 mag. FIG. 4 shows the hot water supply control 2
3 shows details of No. 3. A temperature setter 47 for setting the temperature, a flow rate setter / hot water supply indicator 48 for setting the instantaneous flow rate and supporting the supply / stop of the mixed hot water, a display section 49 for displaying the temperature or the flow rate, and which is to be displayed are selected. It consists of a switch 50. The flow rate setter / hot water supply indicator 48 can stop and start hot water supply at the same time by setting the flow rate set value to 0 or other values, but the flow rate setter and the hot water supply indicator are separate. May be provided.

Next, the operation of this embodiment will be described.

First, in the hot water supply control 23, the flow rate setting device / hot water supply instructing device 48 is used to instruct the amount of the mixed hot water to be discharged, whereby the control valve 42 is opened and the mixed hot water flows out. The flow rate of the mixed hot water is detected by the flow rate detector 35, and the control valve 42 is drive-controlled via the controller 24 to a position where the set flow rate is reached. For the mixed hot water, the temperature setting signal set by the hot water supply controller 23 and the mixed hot water temperature signal detected by the temperature detector 34 are compared by the controller 24, and the motor 31 mixes the mixed valve at a position where the difference between them is zero. 36 is driven. When the flow rate setting is set to zero and the control valve 42 is closed to stop the 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, unlike the conventional case, even if the temperature of the temperature detector 34 after the hot water supply is stopped is lowered by cooling, the mixing valve 36 does not open the hot water side and squeeze the water side. Further, since supply / stop of the mixed hot water and adjustment of the instantaneous flow rate can be performed only by operating the hot water supply controller 23, it is not necessary to operate the faucet as in the conventional case, and hot water can be supplied at a fixed flow rate and remote control is also possible. .

In this embodiment, since the flow rate setting device and the hot water supply indicator are integrally formed, there is an advantage that only one operation is required. Further, since the flow rate detector 35 is of a rotary type and is provided between the mixing valve 36 and the temperature detector 34, it has the effect of promoting the mixing of hot water and increasing the temperature detection accuracy of the temperature detector 34. Further, since the mixing valve 36, the temperature detector 34, the flow rate detector 35, and the control valve 42 are provided as an integrated unit, they have the advantage of being easy to handle and compact in terms of manufacturing and construction.

EFFECTS OF THE INVENTION The present invention controls the start / stop control of the mixing valve drive unit by detecting the presence / absence of the supply of the mixed hot water, that is, the presence / absence of the hot water supply, and the flow control of the mixed hot water flow rate using the flow detector signal. The control valve is provided and a buffer means for preventing an excessive load from being applied to the drive is provided, and has the following effects.

(1) When hot water supply is stopped, it is detected by a flow rate detector that continuously detects the flow rate, and the mixing valve is prevented from being driven by the drive device. It is safe because hot water does not come out and the instantaneous flow rate of hot water supply can be adjusted by controlling the control valve.

(2) Even if the mixing valve element is driven by the buffering means, the load is buffered and the mixing valve element can be prevented from being damaged.

[Brief description of drawings]

FIG. 1 is a sectional view showing a conventional hot water supply apparatus, FIG. 2 is a hot water supply system diagram using the hot water supply apparatus of one embodiment of the present invention, and FIG. 3 is a partial sectional view of a hot water supply unit used in the system. Fourth
The figure is a front view of the hot water supply controller used in the system. 23 ... Hot water supply controller (temperature setting device, hot water supply indicator,
Flow rate setting device), 24 ... Controller, 30 '... Spring (buffering means), 31 ... Motor (driving device), 34 ... Temperature detector, 35 ... Flow rate detector, 36 ... Mixing valve, 42 ……
Control valve.

Claims (2)

[Claims] 1. A mixing valve for mixing hot water and water to obtain mixed hot water, a drive device for driving the mixing valve, a buffering means for buffering a load when the mixing valve is driven, and a mixed hot water temperature. Temperature detector to detect, temperature setter to set temperature of mixed hot water, flow rate detector to detect mixed flow rate, flow rate setter to set instantaneous flow rate value of mixed hot water, and instantaneous flow rate value of mixed hot water are controlled Control valve and the signals from the temperature detector and the temperature setting device to control the driving device to obtain an appropriate temperature, and when the hot water is not supplied using the signal from the flow rate detector, the driving device is stopped. A hot water supply device comprising: the flow rate detector; and a controller that controls the control valve based on a signal from the flow rate setter. 2. The hot water supply apparatus according to claim 1, wherein the flow rate detector is a rotary type and is provided between the mixing valve and the temperature detector.