JPH0477211B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater that intermittently supplies hot water from a hot water tap.

BACKGROUND ART A conventional water heater was constructed as shown in FIG. That is, in FIG. 4, water supplied from a water supply 1 enters a tank 3 of an electric water heater 2, is heated by a heater 4, and is stored. Hot water is supplied to the hot water taps 5 and 6 provided at the terminals via a hot water supply pipe 7 connected to the electric water heater 2.

Hot water supply is supplied and stopped by opening and closing the tap 8 or 9 of the hot water tap 5 or 6.

Problems to be Solved by the Invention When hot water is being supplied, it may be necessary to frequently supply and stop the hot water supply. For example, when washing dishes, pots, and pots in the kitchen, you first apply detergent and scrub the dishes with a sponge, then rinse off the detergent with hot water and place them in the dish case. In this case, hot water supply is necessary only when washing away the detergent, and is not necessary for other operations.

In the conventional hot water supply apparatus, the reality is that the tap 8 or 9 of the hot water tap 5 or 6 is manually opened and closed in a certain cycle. For this reason, it took time to open and close the kettle 8 or 9, and it took time to clean up after meals.

Additionally, some people find it too troublesome to open and close the hot water tap 8 or 9, so they leave the hot water faucet 5 or 6 open while washing dishes and let the hot water drip out. Because it was continuously supplied, it went against energy conservation.

SUMMARY OF THE INVENTION The object of the present invention is to provide a hot water supply device that can automatically supply and stop the supply of hot water from a hot water faucet, and can perform intermittent hot water supply.

Means for Solving the Problems In order to achieve the above object, the water heater of the present invention includes a temperature control means for regulating the temperature of hot water, and a hot water supply port for supplying hot water whose temperature is controlled by the temperature control means to a hot water supply target. an on-off valve that supplies and stops temperature-controlled hot water, an intermittent hot water supply switch that instructs intermittent hot water supply, a flow rate detector that detects the amount of hot water supplied, and an integrated flow rate setting means that sets an integrated flow rate value; The hot water supply automatic stop switch stops the hot water supply at a predetermined integrated flow rate value, the intermittent hot water supply switch is turned on and off, and the hot water supply automatic stop switch is turned on and off, and the intermittent hot water supply is selected by opening and closing the on-off valve, and the signal from the flow rate detector is activated. The control circuit includes a control circuit that performs control in combination with selection of an automatic stop hot water supply that stops hot water supply when the cumulative flow rate reaches a set value by the cumulative flow rate setting means.

The device also includes a display unit for displaying the cumulative hot water supply flow rate.

Effect With the above-described configuration, the hot water supply device of the present invention can perform intermittent hot water supply, automatic stop hot water supply, combination of intermittent hot water supply and automatic stop hot water supply, and normal hot water supply without intermittent hot water supply or automatic stop hot water supply by the operation of a switch. This improves convenience by allowing you to choose a combination.

Furthermore, since the integrated value of the flow rate during automatic stop hot water supply is displayed on the display section, convenience for the user can be improved.

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

In FIG. 1, water is supplied from a water supply 11 through a check valve 12 and a pressure reducing valve 13 into a tank 15 in an electric water heater 14, which is a hot water supply source, and is heated by a heater 16 to raise its temperature. stored within.
The hot water made by the electric water heater 14 is connected to the hot water tap 1 on the terminal side.
Hot water supply pipe 19 that supplies hot water to 7 or 18
is provided. Electric water heater 1 with hot water piping 19
A safety valve 20 and an air vent valve 21 are connected near 4. A mixing valve 22 is provided near the hot water tap 18 as a temperature control means, and a water supply pipe 23 and a hot water supply pipe 1 are connected to each other.
9 and hot water are mixed and the mixed hot water is supplied to the hot water tap 18 through the hot water supply pipe 19'. This hot water pipe 19'
is provided with an electric two-way valve 24 that is an on-off valve that supplies and stops the supply of mixed hot water to the hot water tap 18.

This electric two-way valve 24 is controlled via a control device 26 according to the settings of a setting device 25. A flow rate sensor 27 is also provided in the hot water supply pipe 19' as a component of an automatic hot water supply stop circuit that constitutes a part of the control device 26.

Further, 28 and 29 are the taps for the hot water taps 17 and 18. The details of the setting device 25 are shown in FIG. In this embodiment, the setting device 25 is capable of setting both intermittent hot water supply and automatic stop of hot water supply. Mode selection is performed by an automatic hot water supply stop switch 30 and an intermittent hot water supply switch 31. When only intermittent hot water supply is selected, the intermittent hot water supply switch 31 is turned on and the automatic hot water supply stop switch 30 is turned off. When both switches are off, normal constant temperature hot water supply is performed. And electric two-way valve 2
4 opening time setting knob 32 and time setting knob 3
Setting 3 controls the "open" and "close" times.
In this case, the opening time knob 32 and the closing time setting knob 33 are used so that the opening time and closing time can be set arbitrarily.
It is a variable type, and the hot water supply and stop time can be adjusted and set. Further, 35 is a hot water supply amount setting knob, and when the desired total amount of hot water is set in advance, the electric two-way valve 24 is automatically opened after a predetermined amount of hot water has been supplied, and the hot water supply is automatically stopped. In this case, the amount of hot water to be supplied is displayed on the display 34 and the user can conveniently know the amount of hot water to be supplied. To select automatic hot water supply stop, it is necessary to turn on the hot water supply automatic stop switch 30. Intermittent hot water supply and automatic stop of hot water supply can be selected individually, or both can be used in combination. Third
The figure shows an example of an electric control circuit for intermittent hot water supply. The circuit includes an AC power source 35, a transformer 36, a rectifier 37, an on-time time limit circuit 38, an off-time time limit circuit 39, a relay 40, a contact 41, and an electric two-way valve 2.
4 and an intermittent hot water supply switch 31. According to the settings of the setter 25, the on time time limit circuit 38 and the off time time limit circuit 39 operate to set and reset the relay 40. Contact 4 by this relay 40
1 is switched to control the position of the electric two-way valve 24 to repeatedly open and close the hot water supply path.

Next, the operation will be explained. First, when only intermittent hot water supply is desired, the automatic hot water supply stop switch 30 is turned off and the intermittent hot water supply switch 31 is turned on. Then, the opening time and closing time of the electric two-way valve 24 are set using the opening time setting knob 32 and the closing time setting knob 33. By opening the tap 29 of the hot water tap 18, the hot water brought to an appropriate temperature by the mixing valve 22 is intermittently supplied according to the settings. In this case, hot water is supplied for a fixed period of time regardless of the amount of hot water supplied, which is convenient for work that requires hot water in a fixed cycle. Next, if you only want to automatically stop hot water supply, turn on only the automatic hot water supply stop switch 30. Then, when the hot water supply amount setting knob 35 is set to the desired amount of hot water and the tap 29 of the hot water tap 18 is opened, hot water supply starts because the electric two-way valve 24 is opened. The amount of water is detected by the flow rate sensor 27, the flow rate is integrated by the control device 26,
When hot water is supplied to a set amount, a command is issued to close the electric two-way valve 24, and the hot water supply is automatically stopped.
Basically, hot water can be supplied and stopped without the hot water tank 29, but in this case, it is provided to adjust the flow rate. If the electric two-way valve 24 is a linear type that can also adjust the flow rate, the cock 29 may be omitted. If intermittent hot water supply and automatic stop of hot water supply are not to be used together, they can be used together by turning on both the intermittent hot water supply switch 31 and automatic hot water supply stop switch 30 and setting the time and amount of hot water.

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

(1) Intermittent automatic hot water supply is possible by supplying and stopping temperature-controlled hot water using an on-off valve, eliminating the need to frequently operate the hot water faucet by hand when washing dishes, etc., improving work efficiency and reducing waste. In addition to preventing intermittent hot water supply, the on/off operation of the intermittent hot water supply switch and automatic hot water supply stop switch can prevent intermittent hot water supply,
Automatic stop hot water supply, automatic stop of intermittent hot water supply, and regular hot water supply can be selected at will, greatly improving convenience.

(2) Since the cumulative amount of hot water supply can be displayed during automatic hot water supply stop operation, the user can know the total amount of hot water supply, further increasing convenience.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention;
Figure 2 is an external view showing the setting device of the system, Figure 3
The figure is a circuit diagram showing a control device of the system, and FIG. 4 is a system diagram showing a conventional water heater. 18...Hot water tap (hot water inlet), 22...Mixing valve (temperature control means), 24...Electric two-way valve (opening/closing valve),
26...Control device (control circuit), 27...Flow rate sensor (flow rate detector), 30...Water supply automatic stop switch, 31...Intermittent hot water supply switch, 35...Hot water supply amount setting knob (integrated flow rate setting means), 38, 39
……timer.

Claims (1)

[Scope of Claims] 1. A temperature control means for adjusting the temperature of hot water supply, a hot water supply port for supplying hot water whose temperature has been regulated by the temperature control means to a hot water supply target, and an on-off valve that supplies and stops the temperature-controlled hot water. , an intermittent hot water supply switch that instructs intermittent hot water supply, a flow rate detector that detects the amount of hot water supplied, an integrated flow rate setting means that sets an integrated flow rate value, and an automatic hot water supply stop switch that stops hot water supply at a predetermined integrated flow rate value. , in accordance with the on/off instruction of the intermittent hot water supply switch and the on/off instruction of the automatic hot water supply stop switch, the selection of intermittent hot water supply by opening and closing the opening/closing valve, and the integration of the signal of the flow rate detector to the set value by the integrated flow rate setting means. A control circuit that performs control in combination with an automatic stop hot water supply option that stops hot water supply when the temperature reaches a certain point. 2. The hot water supply device according to claim 1, which has a display unit for cumulative hot water supply flow rate.