JPS6330917A - Mixing device for hot water and cold water - Google Patents

Abstract

PURPOSE:To reduce a driving force of a hot water/water mixing valve and a flow rate control valve and to reduce the power consumption by constituting the titled device so that the pressure of hot water and cold water which have been reduced are applied to both the valves. CONSTITUTION:When a faucet switch 50 of a setting device 30 is depressed, in a state that a feed of hot water has been stopped a cold water side motor 43 and a hot water side motor 44 are operated and a water side valve 36 and a hot water side valve 37 are opened. Since a hot water side system is provided with a pressure reducing valve 17, pressure is in a lower state than that of a water side, and the pressure is equalized by a pressure valance valve 32, therefore, the pressure applied to the water side valve 36 and the hot water side vale 37 becomes lower than a state that a hydraulic pressure is applied directly. In this way, the cold water side motor 43 and the hot water side motor 44 can be operated by a small capacity, and the power consumption is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing device for supplying hot water to adjust the mixing ratio of hot water and water to obtain an appropriate temperature.

2. Description of the Related Art A conventional hot water mixing device of this type is shown in FIG. (For example, Japanese Utility Model Publication No. 61-18424) In FIG. 4, water supply 1 is branched into two systems, and hot water supply pipe 3 passing through water heater 2 and water supply pipe 4 are connected to constant temperature water heater 5. There is. Inside the constant temperature hot water supply device 5, the hot water supply pipe 3
A flow valve 6 is connected to the water supply pipe, and a water flow valve 7 is connected to the water supply pipe to adjust the mixing ratio. The mixing pipe 8 is provided with a thermistor 9 that detects the temperature of the mixed water, and a controller 1 that arbitrarily adjusts the signal of the thermistor 9 and the temperature of the mixed water.
Based on the signal 0, the control device 11 turns on the water flow valve 6 and the water flow valve 7.
can be controlled. The mixed hot water passes through a faucet 12 provided at the end of the mixing pipe 8 and is supplied to a bathtub 13 to which hot water is supplied. Incidentally, although the hot water flow valve 6 and the water flow valve 7 can be controlled by the control device 11, the water supply 1 was not provided with any pressure reducing means. Note that the hot water side valve 6 is driven by a hot water side motor 14 and the water side valve 7 is driven by a water side motor 15.

Problems to be Solved by the Invention However, the above configuration has the following problems.

(1) Since the water supply 1 is not equipped with any pressure reducing means, excessive pressure may be applied to the hot water side valve 6 and the water side valve 7. It requires a large amount of power and consumes a lot of power, and since it is electrically driven, there is a risk that if it stops working due to excessive pressure, hot water will be supplied, creating a danger.

2) Since the faucet 12 is subject to vehicle inspection, it is inconvenient when mixed hot water is used at multiple locations.

(3) The faucet 12 is manually adjusted, and the mixed water temperature is set using the controller 10, which is inconvenient as it requires operations at multiple locations.

(4) Since the bathtub is not equipped with any means for controlling hot water storage in conjunction with hot water supply, there are inconveniences such as hot water being supplied even when the bathtub is not plugged.

(5) After using a temporary bath to raise the water temperature in the bathtub, even if the normal operating temperature is specified, hot water will not be supplied from the faucet 12 until the hot water remaining in the mixing pipe 8 is drained. It was dangerous.

The present invention solves these conventional problems, and aims to provide a safe hot water mixing device that does not place an excessive load on the hot water mixing valve.

Means for Solving the Problems In order to solve the above problems, the hot water mixing device of the present invention has the following features:
A pressure reducing means that reduces the pressure of hot water, water pressure, or both hot water and water, an electrically controlled hot water mixing valve connected to the hot water piping and water piping after pressure reduction, and a flow rate adjustment of the mixed hot water. a flow rate control valve for controlling the hot water, a supply port means such as a faucet or a switching valve for supplying mixed hot water to the hot water supply target, a setting device for setting at least the temperature of the mixed hot water, and a control for controlling the hot water mixing valve according to the setting of the setting device. It consists of a container.

Effect of the present invention With the above-described configuration, hot water and water pressure after pressure reduction are applied to the hot water mixing valve and the flow rate control valve, thereby reducing the driving force and power consumption of both valves, and preventing the valve from closing due to excessive pressure. This prevents failures in hot water supply and water shutoff due to malfunctions.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 1 shows a first embodiment. The water supply 16 passes through a pressure reducing valve 17 and a check valve, and is branched into a water supply pipe 20 and a water pipe 21, which supply water to a water heater 19 having a can body, such as an oil boiler or an electric water heater. A hot water pipe 22 and a water pipe 21 from the water heater 19 are electrically controlled and connected to a two-hot water mixing valve unit 23 . This hot water mixing valve unit 23 also serves as a flow rate control valve, which will be described in detail later.

The mixed hot water passes through the mixing hot water pipe 24 and is connected to the shower 26 and the cooker 2 by a manual switching valve 25 which is a supply port means.
7 supplies mixed hot water to two hot water supply targets. Karan 27
It is of a swing type and can be used in both the bathtub 28 and the washing area 29. Further, a setting device 30 is provided near the switching valve 25, and is configured to be able to set at least the mixed water temperature. This setting device 30
The drain valve 31 of the bathtub 28 is controlled in conjunction with the setting, thereby controlling the storage of hot water in the bathtub. In addition, the mixing valve unit 23
The power supply lowered to 12V by the control unit 32 in the water heater 19 is connected to the power supply, and the setting device 30 and drain valve 31 are also connected to the 12V power supply.
2V is connected. FIG. 2 is a diagram showing details of the mixing valve unit (23).

The water pipe 21 and the hot water pipe 22 pass through check valves 33 and 34 provided in the valve frame 32 connected to the mixing valve unit 23 and a pressure balance valve 35 that balances the pressure of water and hot water. The water side valve 36 and the hot water side valve 37 are reached. The water side valve 36 and the hot water side valve 37 are composed of valve bodies 38 and 39 made of ceramic. The main parts of the structure of this valve body 38, 39 are:
It is constructed as shown in FIG. 3, and the opening area of the valve operating body 41 that slides on the fixed valve body 40 is adjusted according to the rotation angle, thereby controlling the flow rate. The valve body 41 is fitted into a fitting part 43 provided at the tip of the drive shaft 42 and rotated. Second
Returning to the figure, the drive shaft 42 is driven by a drive blade from an externally provided water side motor 43 and hot water side motor 44 via a reduction gear 45. 46 is a valve position detection means. The temperature of the mixed hot water is detected by a thermistor 47, and the flow rate of the mixed hot water is detected by a flow rate sensor 48. Valve position detection means 46 and thermistor 47
The signals from the flow rate sensor 48 and the setting device 30 are taken into the controller 49, and the controller 49 controls the display of the water side motor 43, the hot water side motor 44, and the setting device 30.

The setting device 30 is configured as shown in FIG.

A shikaran switch 50 supplies mixed hot water at a preset temperature, flow rate, and integrated flow rate value, and starts and stops hot water supply each time it is pressed, and a shower switch 51 similarly supplies hot water at preset values for temperature and flow rate. , a mixed water temperature up switch 52 that changes the preset water temperature, a down switch 53, a flow rate switch that changes the preset flow rate, a water switch 55 that instructs water supply, and the adjacent up switch 52 at the same time. Hot water switch S6 that supplies hot water when pressed, various display sections 57, warning buzzer 5
8 have been cast. Inside the cover 59 are timers 60, 61 and a timer switch 62 for setting the hot water supply start time.
, a display section 63 for checking the timer, a temperature setting device 64 for hot water supply, a flow rate setting device 65, an integrated flow rate setting device 66, a temperature setting device 67 for shower hot water supply, and a flow rate setting device 68.

A cut portion 69 is provided. FIG. 5 is a control block diagram of the main parts of this embodiment. The controller 49 includes a temperature comparison section 70, a flow rate comparison section 71, an integrated flow rate comparison section 72, a flow rate integration section 73, an adjustment section 74, and the like.

FIG. 6 is a detailed view of the drain valve 31. A driving unit 75 having a motor inside rotates a valve body 77 which has a similar shape to the valve body shown in FIG. Adjust the opening level. 7
9 is a manual handle. Figure 7 shows the switching valve 2 of this embodiment.
5 is a diagram showing details of No. 5. FIG. By pressing the push button 80, the switch valve 25 switches between the flusher 27 and the shower 26. The switching valve body 25 has a wax thermometer 81.
A temperature safety valve 82 that operates at 100° C. is provided to prevent high-temperature hot water (for example, 45° C. or higher) from being accidentally supplied during the shower or from being interrupted due to a malfunction, resulting in a dangerous situation.

Next, the operation of this embodiment will be explained. If you press the click switch 5o on the setting device 30 when the hot water supply has stopped,
The water side motor 43 and the hot water side motor 44 operate, and the water side valve 36
Then, the hot water side valve 37 is opened.

The hot water side system is equipped with a pressure reducing valve 17, so the pressure is lower than the water side (for example, hot water pressure 0.6 to 9/d, water pressure 2
kg/d), and the pressure is equalized by the pressure balance valve 32, so the pressure applied to the water side valve 36 and the hot water side valve 37 is lower than when the water pressure is normal, and the water side motor 43 The hot water side motor 44 can operate even if its capacity is low, and its power consumption is also low. Water side valve 36 and hot water side valve 3
7 is opened, the temperature, flow rate, and integrated flow rate preset corresponding to the click switch 5o are set by the thermistor 47,
A controller 49 controls and adjusts the hot water side motor 43 and the water side motor 44 using the signal from the flow rate sensor 48. The cumulative flow value is usually set at the capacity of the bathtub for 2 days, and the timer 6
When filling hot water using the 0.61, the drain plug 31 is automatically closed so that hot water can be filled. When the cumulative flow rate reaches the set value, the water side valve 36 and the hot water side valve 37 are automatically closed and hot water supply is stopped. When hot water is used in the washing area 29, the capacity of the bathtub 28 is not used, so when the hot water supply is no longer needed, the hot water supply is stopped by pressing the flush switch 50 again. If the temperature of the water in the bathtub 28 drops during bathing and it becomes necessary to raise the temperature, press the up switch Ω and the hot water switch 56 at the same time to supply hot water, and the hot water display 57 will flash to warn you. Buzzer 58 sounds.

Even if an attempt is made to switch the switching valve 25 to the shower side by mistake in this state, hot water will not flow from the shower 26 due to the action of the temperature safety valve 82. When using the shower 26, when the shower switch 51 is pressed, shower hot water is supplied at a preset water temperature and flow rate.

When the shower 26 is used, the hot water switch 56 is disabled, and the preset value is configured such that a high temperature cannot be specified. (For example, below 45°C) This also applies when pressing the hot water switch 50, but if you want to supply hot water under conditions other than the preset value determined corresponding to the shower switch 51, press the hot water switch 56 or water switch. 55, temperature up switch 52, down switch 5
3. The flow rate switch 54 is configured so that changes other than preset values can be made. The values changed by operating these switches, except for the hot water switch 56, remain for a predetermined time after hot water supply is stopped, and if hot water is to be resupplied within the predetermined time, hot water will be supplied using the changed values. After a predetermined time, it returns to the original precent value. In addition, hot water switch 5
6) The amount of hot water supplied is determined depending on the number of times you press the button, and if you want to raise the temperature by pouring hot water into the bathtub 28, press the button once (for example, 204) or twice (for example, 401) depending on how cold it is.
, continuous hot water supply is possible. In the case of once or twice, hot water supply is automatically stopped after a predetermined amount of hot water has been supplied.

The effects of this embodiment are as follows.

(1) Since the pressure reducing valve 17, which is a pressure reducing means, is provided in the water supply pipe 20 to the water heater 19, water can be supplied to the hot water mixing unit 23 under high pressure, so the flow rate during water supply can be increased.

(Since the switching valve 25 which is the 21 supply port means can supply hot water to a plurality of hot water supply targets, - hot water mixing valve units 23
It is possible to supply hot water to multiple locations. Moreover, it is a manual type and can be provided at low cost.

(3) Since the setting device 30 is provided near the switching valve 25, which is the supply port means, the operating section is located close to it, making it easy to use.

4) On the 2nd day of the bathtub where hot water is to be supplied, the water is automatically stopped by the drain valve 31 when water is supplied using the timer 60 or 61, so if you forget to stop the drain, the hot water will flow out unnecessarily. There is no need to put it away.

(The 51 setting device 30 has a hot water switch 56 that controls the amount of hot water supplied according to the number of operations, which is convenient when warming the water.

(6) Setting changes made by the up switch 52, down switch 53, water switch 55, and flow rate switch 54 in the setting device 30 are performed for a predetermined period of time after hot water supply is stopped. Convenient when doing so.

FIG. 8 shows another embodiment of the present invention. The difference from the first embodiment described above is that the water supply pipe 21 to the water heater 19 branches after passing through the pressure reducing valve 17, and the hot water mixing valve unit 2
A branch pipe 83 is provided to branch the hot water pipe on the upstream side of the hot water pipe 3, and the hot water is supplied to the bathtub 28 which is the object of hot water supply via a flow rate control valve 84.The switching valve is an electrically controlled switching valve 85. Another point is that the setting device 30 is housed integrally with the switching valve 85 and the flow rate control valve 84 in a case 86. The hot water supply can be controlled from a remote location using the remote control 86, and hot water supply instructions can be given using the telephone 87.

The hot and cold water mixing valve unit 23 is subjected to the reduced pressure of both the hot water and the water. In addition, hot water is supplied to the branch pipe 83.
Hot water is supplied to the bathtub through it. This means that if the shower 26 is used after showering, the mixing valve unit 2
The switching valve 85 is constructed as shown in FIG. 9 to prevent hot water remaining between the switching valve 3 and the switching valve 85 from being supplied. The switching valve element 87 is driven by an electrically intermittent drive means to switch between the shower 26 and the flush 27. This switching operation is setter 30.
This can be done in conjunction with the click switch 50 and shower switch 51. A spring 89 made of shape memory alloy is provided to prevent hot water from being supplied in the unlikely event of a breakdown.

The effects of this embodiment are as follows: (1) The water supply pipe 20 and water pipe 21 of the water heater 19 are branched downstream of the pressure reducing valve 17, which is one pressure reducing means, and are supplied to the hot water mixing valve unit 23. As a result, both hot water and water pressure can be kept low, requiring even less driving force and reducing electricity consumption.

f2) Since the hot water pipe 22 is branched upstream of the hot water mixing valve unit 23 and hot water is supplied via the flow rate control valve 84, no hot water remains in the pipe leading to the shower 26, making it safe.

Note that in the above two embodiments, the hot water/water mixing valve is an example of a system that combines mixing and flow rate control, but the functions may be divided and the mixing valve and the flow rate control valve may be provided separately.

Effects of the Invention As described above, according to the hot water mixing device of the present invention, the following effects can be obtained.

(1) Because at least one of hot water pressure and water pressure can be reduced,
The driving force of electrically controlled hot water mixing valves and flow rate control valves can be reduced, the capacity of the driving means can be small, and power consumption can be reduced. In addition, it is safe because boiling water will not be produced due to malfunction.

2) Since the pressure of at least one of the hot water and water is reduced by the pressure reducing means, fluctuations in the source pressure of the water supply can be alleviated, and there are fewer changes in flow rate in response to fluctuations in the source pressure caused by the flow rate control valve, reducing the need for operations. .

(3) The flow rate control valve enables automatic stopping and starting of hot water supply.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a hot water mixing device according to a first embodiment of the present invention, Fig. 2 is a sectional view showing a hot water mixing valve of the same device, and Fig. 3 is a square body of the mixing valve part of the same device. Perspective view shown, No. 4
The figure is a front view showing the setting device of the same device, Fig. 5 is a control block diagram of the same device, Fig. 6 is a partially cutaway sectional view showing the drain valve of the same device, and Fig. 7 is the switching valve of the same device. 8 is a configuration diagram showing a hot water mixing device according to a second embodiment of the present invention, FIG. 9 is a sectional view showing a switching valve of the same device, and FIG. 10 is a conventional hot water mixing device. FIG. 19...Water heater, 21...Water piping, 2
2...Hot water piping, 23...Hot water mixing valve unit (hot water mixing valve, controller, flow rate control valve), 25...
...Switching valve (hot water supply port means), 30...Setting device. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 General Figure 6 Figure 7 εl

Claims (10)

[Claims] (1) Hot water piping that supplies mixed water from the water heater, water piping that supplies water, pressure reducing means that reduces the pressure of hot water or the pressure of water, or the pressure of both hot water and water, and hot water piping and water after pressure reduction. An electrically controlled hot water mixing valve connected to the piping, a flow rate control valve for adjusting the flow rate of the mixed hot water, a supply port means for supplying the mixed hot water to the hot water supply target, and a setting for setting at least the temperature of the mixed hot water. and a controller that controls the hot water mixing valve according to the setting of the setting device. (2) The water supply pipe to the water heater and the water pipe are branched on the downstream side of one pressure reducing means, and the water pressure and the hot water pressure are reduced and supplied to the hot water mixing valve. hot water mixing device. (3) The hot water mixing device according to claim 1, wherein the pressure reducing means is provided only in the water supply pipe to the water heater to reduce only the hot water pressure. (4) The hot water mixing device according to claim 1, wherein the supply port means is a switching valve that switches the supply of mixed hot water to a plurality of hot water supply targets. (5) The hot water mixing device according to claim 4, wherein the switching valve is a manual switching valve. (6) The hot water mixing device according to claim 1, wherein the setting device is separately provided near the supply port means. (7) The hot water mixing device according to claim 1, wherein hot water is supplied to a bathtub, and hot water storage is controlled in conjunction with the supply of mixed hot water. (8) The hot water mixing device according to claim 1, wherein the hot water piping is branched from the upstream side of the hot water mixing valve and is supplied to the hot water supply target via the flow rate control valve. (9) The hot water mixing device according to claim 1, wherein the setting device has a hot water switch that controls the amount of hot water supplied according to the operation. (10) The hot water mixing device according to claim 1, in which the setting change value in the setting device is left in the controller for a predetermined time after the hot water supply is stopped.