JPH07117252B2 - Water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device that includes a mixing valve for mixing hot water and water and that can supply hot water at an indicated flow rate.

2. Description of the Related Art Conventionally, this type of hot water supply device has been constructed as shown in FIG. That is, in FIG. 4, the valve shaft 1 is moved forward and backward by driving the servo motor 2. 3 is a double-sided hot-water valve that adjusts 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. 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 side double-sided valve 3 is provided between the two hot water side seats 6 and 9, and the forward and backward movements of the valve shaft 1 cause the hot water side double sided valve 3 to contact and separate the two hot water side seats 6 and 9 from each other. There is a relationship, and each opening is adjusted.
Reference numeral 10 denotes a water side seat formed at the outlet of the water supply passage 12 in the mixing chamber 11 which also serves as the water side valve chamber. The water side seat 10 is brought into contact with and separated from the water side one-side valve 4 by the forward / backward movement of the valve shaft 1. The opening is changed and adjusted. The mixed hot water in which hot water and water are mixed is supplied from the mixed hot water outlet passage 13, and the hot water outlet temperature detection sensor 14 is provided in the mixed hot water outlet passage 13. 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 setter (not shown) can be 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. If 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, the heating will not catch up if a large amount of hot water is discharged, 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.

Problems to be Solved by the Invention Since this conventional hot water supply device is configured as described above, it has the following problems.

(1) If the mixed hot water outlet 13 part cools down due to natural cooling when the hot water supply is stopped, the hot water temperature sensor 14 detects this and the valve moves to increase the proportion of hot water. It was dangerous because hot water came out, and it took time to move to a position where the proper temperature was obtained.

(2) Since the supply / stop of the mixed hot water was done manually at the faucet, there was no instruction to start / stop the hot water supply from a remote location, and it was impossible to supply the mixed hot water at an appropriate flow rate value. there were.

In addition to the above conventional example, the valve is driven by utilizing the thermal expansion and contraction of the wax to automatically adjust the mixing ratio of hot water by the Karan type automatic mixing valve and the mechanism of the water meter of the water supply. There was an automatic mixing metering faucet combined with a metering valve for stopping water. However, the above-mentioned problem (1) has not been solved yet, and since it is mechanically configured, the structure is complicated, remote operation is not possible, and the above-mentioned problem (2) that the instantaneous flow rate value cannot be specified has not been solved. It was

The present invention provides a hot water supply apparatus that solves such conventional problems, has excellent safety and responsiveness, and simplifies remote operation for starting and stopping hot water supply and operation for setting an instantaneous flow rate value of hot water supply. It is an object of the present invention to provide a hot water supply device which aims at.

Means for Solving the Problems To achieve this object, the present invention provides a mixing valve for mixing hot water and water to obtain mixed hot water, a drive device for driving the mixing valve, and a temperature detection for detecting the mixed hot water temperature. , A temperature setting device for setting the temperature of the mixed hot water, a flow rate detector for detecting the instantaneous value of the mixed hot water, a control valve for supplying and stopping the mixed hot water, and adjusting the instantaneous flow rate, and supplying and stopping the mixed hot water. The hot water supply instruction function for instructing and the flow rate setting function for setting the instantaneous flow rate value of the mixed hot water are provided integrally and can be set at the same time, and the mixed hot water supply of the flow rate setter and hot water supply indicator The control valve is controlled based on the stop setting, the instantaneous flow rate set value and the signal from the flow rate detector, and the drive device is controlled by the signals from the temperature setter and the temperature detector. When the hot water supply is stopped, the signal from the flow rate detector is controlled. Control to stop the drive of the drive device It is configured by including a controller for performing.

With the above configuration, the hot water supply device of the present invention opens and closes or adjusts the control valve based on the setting of the flow rate setter / hot water supply indicator to supply, stop, and adjust the flow rate of the mixed hot water.
The drive of the mixing valve is stopped when hot water supply is stopped to prevent the mixing valve from opening on the hot water side due to natural cooling, thereby simplifying the operation and improving safety.

Embodiment An embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, hot water produced by the hot water supply heat source unit 16 is a hot water supply pipe 17
And is supplied to the hot water supply unit 18. Hot water supply unit 18
A water supply pipe 19 is also connected to this, and the mixed mixed hot water is supplied to the bathtub 22 from the hot water supply port 21 through the mixed hot water pipe 20. In the vicinity of the hot water supply port 21, a hot water supply controller 23 is provided which can set the temperature, set the instantaneous flow rate of the mixed hot water, and instruct the 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 are supplied to the hot water supply port 21 through the hot water outlet 29 and the hot water valve 27 with the mixing ratio adjusted.
The hot water valve body 27 and the hot water valve body 28 are provided on the valve shaft 30 with both ends regulated and urged by springs in a direction in which they are separated from each other.
Driven through 33. Temperature detector 34
Done by. Reference numeral 35 is a flow rate detector, which is a mixing valve including a hot water valve body 27, a water valve body 28, a valve shaft 30 and the like.
It is provided between 36 and the temperature detector 34. Flow rate detector
Reference numeral 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 the ball, and a fixing unit 41. Mixing of the hot water and water whose ratio has been adjusted by the mixing valve 36 is promoted by the flow rate detector 35, and the 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, the control valve 42 for supplying / stopping the mixed hot water and controlling the instantaneous flow rate value is composed of a valve body 43, a shaft 44, a motor 45, a gear box 46 and the like. FIG. 3 shows the details of the hot water supply controller 23. Temperature setter 47 for setting temperature,
It comprises a flow rate setter / hot water supply indicator 48 for setting the instantaneous flow rate and for instructing the supply / stop of the mixed hot water, a display section 49 for displaying the temperature or the flow rate, and a switch 50 for selecting which to display. The flow rate setter and hot water supply indicator 48
The hot water supply can be stopped and started at the same time by setting the flow rate setting value to 0 or other values.

Next, the operation of this embodiment will be described.

First, in the hot water supply controller 23, the flow rate setting device / hot water supply indicator 48 indicates the amount of the mixed hot water to be discharged, and the control valve
42 is opened and the mixed 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 temperature detector 34
The controller 24 compares the signals of the mixed hot water temperature detected in 1. and the motor 31 drives the mixing valve 36 to a position where the difference between the two is zero. 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. Also, supply of mixed hot water
Since it can be stopped only by operating the hot water supply controller 23, there is no need to operate the faucet as in the conventional case, and hot water can be supplied with a fixed amount of water and remote control is also possible. In this embodiment, the flow rate setter / hot water supply indicator 48 is formed in a lever shape as shown in FIG. 3, but it may be a rotary type like a volume. Alternatively, a touch switch may be used so that the flow rate increases or decreases each time the switch is pressed. The point is that it is possible to start / stop hot water supply and adjust the flow rate with a single operating unit. By doing this, compared to the case of starting and stopping hot water supply and adjusting the flow rate separately, the operation can be done once at the same place, and it is the same as the operation feeling of the conventional faucet, so it can be used easily by old people and children. The advantage is that the hot water supply can be started by forgetting that the flow rate has been set to a large amount, and the risk of splashing hot water can be prevented.

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

Furthermore, the signal of the temperature detector 34 may be used to obtain the temperature by narrowing down the control valve 42 when the flow rate is too large and the set temperature cannot be obtained.

EFFECTS OF THE INVENTION As described above, the hot water supply device of the present invention includes the mixing valve, the drive device for driving the mixing valve, the control valve for supplying, stopping and adjusting the flow rate of the mixed hot water, the hot water supply instruction function and the flow rate. A flow rate setter / hot water supply indicator that also has a setting function, and a control valve based on the setting of this flow rate setter / hot water supply indicator, and control to stop the drive of the electric device when hot water supply is stopped Since it has a controller, it has the following effects.

(1) When hot water supply is stopped by closing the control valve, this is detected by the flow rate detector for adjusting the instantaneous flow rate, and the driving of the mixing valve is prevented by the drive device. Since hot water does not come out temporarily and the temperature is maintained by the mixing valve even if the control valve should fail, it is safe and the flow rate detector can also function.

Further, since the mixing valve can be used from the position where it was used last time, the time required to reach the position where the predetermined temperature is obtained is short and the responsiveness is improved.

(2) Based on the setting of the flow rate setting device and hot water supply indicator, it is possible to start and stop hot water supply from a remote location and instruct the instantaneous flow rate, and the instantaneous flow rate can be adjusted by other than manual operation, increasing convenience and operation. Will be easier.

(3) Since the hot water supply can be started / stopped and the instantaneous flow rate can be adjusted at the same time by the flow rate setting device and hot water supply indicator, the operation can be done only once at the same location, and the instantaneous flow rate value must be selected every time, especially during hot water supply. The risk of forgetting to set the instantaneous flow rate and producing a large flow rate as it was last time can be avoided, further increasing convenience and safety.

[Brief description of drawings]

FIG. 1 is a view of a hot water supply system using a hot water supply device according to an embodiment of the present invention, FIG. 2 is a partial sectional view of a hot water supply unit used in the system, and FIG. 3 is a front view of a hot water supply controller used in the system. FIG. 4 is a cross-sectional view showing a conventional hot water supply device. 23 …… hot water supply controller (temperature setter, flow rate indicator and flow setter), 24 …… controller, 31 …… motor (drive unit), 34 …… thermistor (temperature detector), 35 …… flow detector , 36 …… Mixing valve, 42 …… Control valve.

Claims (1)

[Claims] 1. A mixing valve for mixing hot water and water to obtain mixed hot water, a drive device for driving the mixed valve, a temperature detector for detecting the mixed hot water temperature, and a temperature setting device for setting the mixed hot water temperature. , A flow rate detector for detecting the instantaneous value of the amount of mixed hot water, a control valve for supplying, stopping and adjusting the instantaneous flow rate of the mixed hot water, and supplying the mixed hot water,
The hot water supply instruction function for instructing to stop and the flow rate setting function for setting the instantaneous flow rate value of the mixed hot water are integrated together and can be set at the same time. The control valve is controlled based on the supply, stop setting, the instantaneous flow rate set value, and the signal of the flow rate detector, and the drive device is controlled by the signals of the temperature setter and the temperature detector. A hot water supply device comprising a controller for controlling the driving of the driving device in response to a signal from a flow rate detector.