JPS5912237A - Hot water feed device - Google Patents

Abstract

PURPOSE:To enable to feed sufficient hot water having a constant temperature even if a pluraity of hot water taps are used, by so constituting that hot water heated by a tap-controlled water boiler is stored in a hot water reservoir and the hot water in the reservoir is fed by increasing pressure of the hot water through a pump to be operated at the time of water feeding. CONSTITUTION:A tap-controlled water boiler 1 is connected with a hot water reservoir 7 provided with a tap-controlled water level control valve A through a feed hot water pipe 3. Then, a feed hot water piping 15 connected with the bottom of the reservoir 7 is connected with a pressure pump P provided with a pressure switch 22 through a buffer type check valve B. When either of a hot water and a cold water mixing taps 27 is opened after feeding of the hot water into the reservoir 7 by igniting the tap-controlled water boiler 1, the pump P is put into operation by the pressure switch 22 through decrease of pressure inside a feed hot water piping 21, the hot water inside the reservoir 7 is made to run through the feed hot water piping 15, a strainer 16, the check valve B, the pump P, the feed hot water piping 21 and a stop valve 26 and a sufficient quantity of the hot water having a constant temperature is released from a shower head 35.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device for a plurality of hot water taps or mixer taps used in barber shops and the like. If multiple hot water taps or hot water mixing taps are installed in the hot water pipe of one instantaneous water heater, for example, in winter, the water supply temperature is 5°C, the discharge water temperature is 40°C, and the water flow rate is 9.5°C per minute.
In the case of an instantaneous water heater with a hot water supply capacity of 28/2, at the same time 2
If you open each hot water tap or mixer tap, only 4.641 hot water will come out per minute. Furthermore, in the summer, when the water supply pressure decreases, the water governor or flow switch of the instantaneous water heater may not work and the water heater may not ignite.

Also, with instant water heaters, there is a loss time between opening the hot water tap and igniting the burner, and some cold water will flow out at first, so make sure that the water temperature has reached the specified temperature before using -C. It's a hassle because you have to do it, and there's a lot of loss.

Furthermore, in an instantaneous water heater, the temperature of the hot water discharged changes greatly depending on changes in the flow rate of water passing through the water heater.

For this reason, if you open a hot water tap, hot water mixer tap, or shower while using another hot water tap or hot water mixer tap, the temperature of the hot water will drop rapidly, making it impossible to use the hot water tap at the same time. When used continuously, the first water that comes out becomes particularly hot due to the so-called after-boiling effect, making it difficult to use.

Furthermore, if the water pressure of an instantaneous water heater is insufficient and the hot water tap or mixer tap is used at a temperature of 7°C, a flame will come on and then go out.

The object of the present invention is to solve the problems of the conventional water heaters as described above, and to enable a sufficient amount of hot water to come out from the -C hot water tap or hot water mixer tap.

That is, the present invention connects the hot water supply pipe of an instantaneous water heater to an instantaneous water level control valve provided in a hot water storage tank, and connects the hot water supply tank to a plurality of hot water taps or hot water mixing taps in the middle of the hot water supply pipe. A pressure pump is installed to pressurize hot water and supply it to each hot water tap or hot water mixing tap.A buffer type check valve is installed on the hot water storage tank side of the hot water piping to prevent backflow to the hot water storage tank. A pressure switch is installed on the hot water tap or hot water mixer tap to detect a drop in pressure and start the pressure pump, so that hot water at an appropriate temperature is always stored in the hot water storage tank, and the pump is activated as soon as the hot water tap or hot water mixer tap is opened. To provide a hot water supply device which discharges sufficient hot water.

Hereinafter, the details of this inventive device will be explained based on an embodiment shown in the accompanying drawings.

In Fig. 1, 1 is an instantaneous water heater, and the one used in the example is called No. 13. When the water supply temperature is 25°C, the amount of water discharged when the water discharge temperature is set to 85°C [capacity switching: Big,
Temperature control: Hot) 5.41! /min, water flow rate when water temperature is set to 50℃ (capacity switching: small, temperature control: lukewarm 112
．． It becomes 8J/min.

2 is a water supply pipe of a water heater; 3 is a hot water pipe; the water supply pipe 2 is connected to a water supply pipe 6 that leads to a water supply via a meter 4 and a gate valve 5;

°γ is a hot water storage tank made of fiber-reinforced plastic (FRPI) with excellent heat resistance, heat retention, and impact resistance, and the hot water supply pipe 3 is connected to an instantaneous water level control valve A installed in this tank 1. It is a kind of ball tap, as shown in Figure 2.

This control valve A is commercially available from Saneisha Co., Ltd. under the registered trademark Master Tube. When the water level is lower than the set water level, the 70-to-8 descends as shown in the solid line in Figure 2, and the first
Since the bar 9 and the second lever 10 are tilted downward, the valve body 11 is separated from the valve port 12, and the valve port 12 is fully opened. For this reason, hot water from the hot water supply pipe 3 flows into the tank 7I from the valve port 12, and the water level in the tank 7 gradually rises, but while the rear part 13 of the tank 8 remains submerged in water. is the drawing line g whose center of buoyancy passes through the fulcrum 0 at the upper end of the louver 9
The float 8 does not move and the valve port 12 remains fully open because it is located further back (to the right in Figure 2), but the front part 1 of the 70-toe 8
4 is immersed in water and a buoyant force is generated in the front part 14, the center of buoyancy moves forward from the perpendicular l, the float 8 momentarily rotates upward together with the second lever 9, and the second lever 10 also moves upward. -L direction to push up the valve body 11 and fully close the valve port 12. Also, when the water level drops, the front part 14 of the float 8
When the float 8 rises above the water surface, the float 8 rapidly descends together with the louver 9, lowering the valve body 11 and fully opening the valve port 12. Therefore, this control valve A opens instantaneously and closes instantaneously.

Reference numeral 15 in FIG. 1 is a hot water supply pipe connected to the lower end of the hot water storage tank 7, and this pipe 15 is connected to the suction port of the pressurizing pump P via a stop 1/-16 and a buffer check valve B.

In the check valve B, as shown in FIG. 3, the rubber seat I9 at the bottom of the piston-type valve body 18 pushed by the spring 11 hits the circular receiving part 20 of the valve port 20, so water pressure does not occur. Smolen, 16 from Ishizaki Seisakusho Co., Ltd.
') It is commercially available under the trademark of Yatsukiben.

In Fig. 1, 22 is a pressure switch for controlling the pump attached to the discharge port of the pressurizing pump P, and 21 is a hot water supply pipe.
A pressure gauge 23, an air bleed valve 24, and a stop valve 25 are provided at . Further, the pipe 21 is branched into a plurality of parts, each of which communicates with a hot water mixing faucet 27 via a stop valve 26, and one inlet of the mixing faucet 27 is connected to the water supply pipe 6 via a stop valve 28.

Further, the hot water supply pipe 3 and a part of the hot water supply pipe 21 are communicated through a bypass pipe 29, and a stop valve 3 is connected to the bypass pipe 29.
0.31, and stop valves 32 and 33 are also provided before and after the bypass pipe connecting portion of the hot water supply pipe 3.

In addition, 34 in the figure is the door 1/nkotsuk, 35 is each mixing faucet 27
It is a shower head installed in the shower head.

This invention has the above configuration and is an instantaneous water heater! Under the conditions of pilot burner ignition, IJJ valve 5, stop valve 2
5, 26.28, 32.33, and stop valve 30.
31 is closed and the hot water storage tank 7 is empty, the instantaneous water level control valve A is fully opened, the main burner of the instantaneous water heater 1 is ignited, the water supplied from the water supply pipe 2 is heated, and the control valve A is closed.
Hot water is supplied to the via-C hot water storage tank 7.

In this way, when the water level in the tank 7 reaches the set water level, the control valve A closes, hot water supply stops, and the main burner of the water heater 1 also goes out.

When any of the mixing faucets 27 is opened in this state, the pressure inside the hot water supply pipe 21 decreases, the pump P is activated by the action of the pressure switch 22, and the hot water in the hot water storage tank 7 is pumped from the hot water supply pipe 15 to the stream 1/-.
The water flows through the water supply pipe 16 → check valve B → pump P → pressure switch 22 → hot water supply pipe 21 → stop valve 26 → and mixes with water from the water supply pipe 6, and is discharged from the shower head 35 or the like.

When the water level in the tank 7 drops due to the use of hot water as described above, the control valve A opens and the hot water heated by the water heater 1 is replenished into the tank °γ.

Next, the mixing faucet 27 is closed and when the water pressure in the -C pipe 21 increases, the pump P is stopped by the action of the pressure switch 22.

Furthermore, when the hot water storage tank 7 cannot be used due to a failure of the pump P, etc., the stop valves 25, 33 can be closed, the stop valves 3t) and 31 can be opened, and hot water can be supplied using the conventional circuit.

This invention, as described in -1-, stores hot water heated by an instantaneous water heater in a hot water storage tank, increases the pressure of the hot water in this tank with a pump that is operated during hot water supply, and discharges it from a hot water tap or a mixing tap. Because of this, there is no risk of the hot water temperature dropping even if multiple hot water taps or mixer taps are used at the same time, and hot water at a constant temperature is supplied at a sufficient flow rate from the beginning. In addition, the instantaneous water level control valve used in the hot water storage tank opens instantaneously when the water level reaches a certain level, and opens instantaneously when the water level drops to a certain point. Water flows. Therefore, the banner and flow switch of the instantaneous water heater operate reliably and the -C main burner is ignited, so that hot water is reliably supplied to the hot water storage tank. moreover,
When the hot water supply stops, the check valve works to prevent backflow to the -C hot water storage tank, but since the check valve is a buffer type, there is no water hammer when the check valve closes.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a water heater according to the present invention, FIG. 2 is an enlarged partial vertical side view of an instantaneous water level control valve, and FIG. 3 is an enlarged vertical side view of a buffer type check valve. 1... Instantaneous water heater, 3... Hot water supply pipe, 7... Hot water storage tank, 15.21... Hot water supply piping, 22... Pressure switch, 27... Hot water mixer faucet, A...・Instant action water level control valve, B...Buffer type A reverse 1. “Stop; 111・Valve・、P
...pressure pump. Patent applicant: Ohhiro Seisakusho Co., Ltd. Agent: Kama IB Bunji

Claims (1)

[Claims] The hot water supply pipe of the instantaneous water heater is connected to an instantaneous action water level control valve provided in the hot water storage tank, and the hot water in the hot water storage tank is pressurized in the middle of the hot water supply piping that connects this hot water storage tank and multiple hot water supply faucets or hot water mixing faucets. A pressure pump is installed to supply each hot water tap or hot water mixing tap, and a buffer type check valve is installed on the hot water storage tank side of the hot water piping to prevent backflow to the hot water storage tank. The hot water pressurizing device is equipped with a pressure switch on the stopper that detects a pressure drop and starts the pressurizing pump.