JP4863824B2 - Expansion water drainage mechanism for main-stop electric water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expanded water draining mechanism for a main stop system electric water heater where the air is hardly released from a spout in discharging the water, the expanded water can be properly drained to a draining apparatus side in boiling-up of the electric water heater during water stop, and further chlorine in the water stored inside is hardly emitted. <P>SOLUTION: An aspirator 5 is disposed on a hot water supply pipe 6 connecting the main stop system electric water heater 4 comprising a water supply valve 2 and a water faucet 7, a branch pipe conduit 8 branched from the aspirator 5 is connected to the draining apparatus 9, a first check valve 7b is disposed on the water faucet 7, and a second check valve 55 for preventing intrusion of air or drainage water from a draining apparatus 9 side is disposed at a branch conduit pipe 8 side. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a drainage mechanism that drains expanded water in a main-stop electric water heater.

Conventionally, as disclosed in Patent Document 1, an aspirator is provided in the middle of a pipe connecting a water discharge portion and a faucet of a main-stop electric water heater, and a branch pipe branched from the aspirator is disposed upstream of the drainage device. There is a drainage mechanism for a pre-stop electric water heater that is connected and connected downstream of the drainage device to a drainage pipe.
JP 2003-130469 A

In the mechanism of Patent Document 1, air is sucked from the drainage device when water is discharged from the faucet, so that water discharge is disturbed and water discharge sound is increased.
In addition, since it is a non-stop type, a valve is provided on the water supply side of the electric water heater, and the downstream side of the valve is open to the atmosphere, so the chlorine of tap water escapes, particularly in the hot water pipe leading to the faucet However, there was a problem that germs were easy to propagate.

The present invention has been devised in view of the above-mentioned conventional problems, and does not inhale air from the drainage device side at the time of water discharge, and can keep the bactericidal effect by making it difficult for chlorine in water to escape. An expansion water drainage mechanism for a main-stop type electric water heater is to be provided, and the claim 1 is provided with an aspirator provided in a hot water outlet pipe connecting the main-stop type electric water heater and a faucet, and branched from the aspirator. In the mechanism where the branch pipe is connected to the drain pipe,
A first check valve is provided at the water outlet of the faucet, and a second check valve is provided in the branch pipe to prevent intrusion of air or drainage from the drain pipe side,
The second check valve is set to be opened at a lower pressure than the first check valve, and the inside of the tapping pipe line is kept in a full state .

The present invention provides a mechanism in which an aspirator is provided in a hot water discharge pipe connecting the main water heater and the faucet, and a branch pipe branched from the aspirator is connected to a drain pipe. And a second check valve for preventing intrusion of air or drainage from the drain pipe side in the branch pipe, and the second check valve is the first check valve. It is set so as to open at a lower pressure than the valve, and since the inside of the tapping pipe line is kept in a full state , the expansion water is not discharged from the faucet, and the expansion water is drained well. It can be drained to the side. In addition, since the first check valve and the second check valve do not release the downstream side from the water supply valve to the atmosphere, the chlorine in the water is difficult to escape, so that the sterilization effect can be maintained. Miscellaneous bacteria will not be discharged. Moreover, air does not come out at the early stage of water discharge from the water outlet, and the water discharge sound does not increase.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic arrangement configuration diagram of an expansion water drainage mechanism for a main-stop type electric water heater, and a water supply valve 2 with an electromagnetic valve is provided downstream of a main plug 1 connected to a water pipe. The water supply pipe 3 is connected to the outlet side of the water supply valve 2, and the water supply pipe 3 is connected to the electric water heater 4. When the water supply valve 2 is opened and closed, the water supply pipe 3 is passed through the water supply pipe 3 and the water is supplied into the electric water heater 4. It is configured to be supplied with water.

Further, an aspirator 5 is provided in a hot water outlet 4 a that is an outlet of hot water boiled in the electric water heater 4, and a hot water pipe 6 is connected to the aspirator 5, and an automatic water tap 7 is provided downstream of the hot water pipe 6. Is connected.
Further, a branch pipe 8 branched from the aspirator 5 is provided, and a drainage device 9 is connected to the downstream end of the branch pipe 8, and a trap 9a is built in the drainage device 9, and on the outlet side. Is connected to a drain pipe 9b and can discharge the expanded water.

  The water outlet 7a of the water faucet 7 is provided with, for example, a spring-type first check valve 7b. When a hand is inserted into the lower part of the water outlet 7a, the hand is automatically detected. Then, the water supply valve 2 is opened, tap water is supplied to the electric water heater 4, hot water is boiled by the heater in the electric water heater 4, and the hot water is supplied from the spout 7a through the hot water discharge pipe 6 from the aspirator 5. It is configured to discharge water.

  A cross-sectional enlarged view of the aspirator 5 will be described with reference to FIG. 2. A reduced diameter portion 50 a having a reduced inner diameter is formed in the main body 50 of the aspirator 5, and a tapping pipe connecting the tapping pipe 6 to the downstream side thereof. The pipe connection part 50b is integrally formed. A flange 50c is integrally formed in a bowl shape on the opposite side of the main body 50 from the hot water pipe connecting portion 50b.

  A flange 51a that is aligned with the flange 50c of the main body 50 and is fastened and fixed with a screw or the like is formed in the insertion fitting 51 that is inserted into the main body 50 in a watertight manner via an O-ring O. Inside the fitting 51, a hot water passage 52 communicating with the main body 50 is provided so as to communicate with the hot water portion 4a, and at the downstream end of the fitting 51, the nozzle portion 51b faces the reduced diameter portion 50a. Is formed. Further, a branch fitting 53 is attached to the main body 50 from the lateral direction in a threaded manner via a screw portion 53a, and this branch fitting 53 is also attached to the main body 50 via an O-ring O in a watertight manner.

  A branch pipe connecting portion 53b is formed at the tip of the branch metal fitting 53, and the branch pipe 8 is connected to the branch pipe connecting portion 53b. A second check valve 55 is provided in the branch path 54 formed in the branch fitting 53, and the second check valve 55 is provided with its flange portion 55 a fixed in the branch path 54. ing.

The second check valve 55 is made of rubber and has a structure as shown in an enlarged perspective view in FIG. 3, and a large-diameter portion 55b is continuously formed from the flange portion 55a, and the large-diameter portion 55b. An inclined diameter portion 55c that is reduced in an inclined shape is integrally formed at the tip of the slit, and a slit-shaped slit valve hole 55d is formed at the tip of the inclined diameter portion 55c.
When the expanded water flows into the inside from the large diameter portion 55b side, the inclined diameter portion 55c is expanded by the water pressure of the expanded water as shown in FIG. 4, and the slit valve hole 55d is opened.
The second check valve 55 is set to operate at a lower pressure than the first check valve 7b provided in the faucet 7 and to be opened as shown in FIG.

  In such a structure, when water is discharged from the water outlet 7a of the faucet 7, the discharged water passes through the reduced diameter portion 50a from the nozzle portion 51b, and the flow velocity is increased at the reduced diameter portion 50a, thereby generating a negative pressure in the main body 50. However, in this case, the second check valve 55 is closed at a negative pressure as shown in FIG. 3, and air is not caught from the drain pipe 9b side of the drainage device through the branch pipe 8.

  Further, when water discharge starts from the water outlet 7a of the faucet 7, the hot water discharge pipe 6 is filled with water, that is, when the first check valve 7b is closed, air enters the hot water discharge pipe 6. Therefore, the discharge pipe 6 is filled with water, so that air does not come out at the beginning of water discharge from the water discharge port 7a, and air is not sucked from the drainage device 9 side at the time of water discharge. Does not grow.

  On the other hand, when the faucet 7 stops the hot water in the electric water heater 4 while the water faucet 7 is boiling, the expansion water flows out from the tank in the electric water heater 4 to the aspirator 5. As described above, the first check valve Since the second check valve 55 is set to be opened at a lower pressure than 7b, the slit valve hole 55d of the second check valve 55 is opened when the expansion water is generated, and the expansion water passes through the branch path 54. Thus, the water is drained from the drain pipe 9b of the drainage device 9, and the expansion water can be drained well to the drainage device 9 side.

  Conventionally, the water supply pipe 3, the electric water heater 4, and the outlet pipe 6 on the downstream side of the water supply valve 2 are open to the atmosphere, but in this example, the first check valve 7b and the second check valve 55 are provided. Is provided, the downstream side of the water supply valve 2 is not open to the atmosphere, and the water supply pipe 3, the electric water heater 4, and the hot water discharge pipe 6 are not open to the atmosphere. The chlorine can maintain a good sterilizing effect, and in particular, no germs are accumulated in the tap pipe 6 and the germs are not discharged from the water outlet 7a.

It is a general | schematic arrangement block diagram of the expansion water drainage mechanism in a former stop | fastening type electric water heater. It is a cross-sectional enlarged view of the aspirator in FIG. It is an expansion perspective view of the 2nd non-return valve provided in the branch path of an aspirator. It is a perspective block diagram of the 2nd check valve in the state where the slit valve hole of the 2nd check valve was opened.

2 Water supply valve 3 Water supply pipe 4 Electric water heater 4a Hot water outlet 5 Aspirator 6 Hot water outlet 7 Water faucet 7a Water outlet 7b First check valve 8 Branch pipe 9 Drainage appliance 9b Drain pipe 50 Main body 50a Reduced diameter section 50b Hot water pipe connection section 51 Insertion fitting 51b Nozzle part 53 Branch fitting 53b Branch pipe connection part 54 Branch path 55 Second check valve 55a Flange part 55b Large diameter part 55c Inclined diameter part 55d Slit valve hole

Claims (1)

In a mechanism in which an aspirator is provided in a hot water discharge pipe connecting the main-stop electric water heater and the faucet, and a branch pipe branched from the aspirator is connected to a drain pipe,
A first check valve is provided at the water outlet of the faucet, and a second check valve is provided in the branch pipe to prevent intrusion of air or drainage from the drain pipe side,
The second check valve is set to be opened at a lower pressure than the first check valve, and the inside of the tapping pipe line is kept in a full state. Expansion water drainage mechanism for electric water heaters.

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