JPS5949460B2 - Delayed switching mechanism that can be used in water heaters capable of generating steam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching mechanism for supplying hot water, etc. generated by a heat exchanger to two systems of hot water supply circuits, and more specifically to a gas water boiler capable of generating steam. When switching from supplying steam or high-temperature water to a bathtub to supplying moderate-temperature water to a shower or hot water faucet, the former steam or high-temperature water, or commonly referred to as "post-boiling" (in an instantaneous water heater) This method reliably prevents the dangerous phenomenon of hot water flowing out from the shower or hot water faucet (in which the water accumulated in the pipes turns into boiling water due to heat transfer from the heat absorption fins of the heat exchanger after it has been discontinued). This invention relates to a delay switching mechanism for a hot water circuit.

As shown in FIG. 10, a conventional water heater capable of generating steam ignites a main burner B by operating a water pressure-responsive gas valve A.
The flow rate of water flowing through the water flow path F that connects the primary chamber of the diaphragm chamber C and the primary side of the heat exchanger E is controlled by the throttle and venturi orifice G and the water volume adjustment valve H provided in the water flow path F. It is configured to increase or decrease to generate a desired temperature or steam.

In the gas water heater configured as above that can generate steam and normal hot water, a three-way switching valve ■ is provided in the hot water supply circuit connected to the secondary side of the heat exchanger, and when supplying steam or hot water to the bathtub. To supply hot water to the shower or hot water faucet, switch the switching valve I to the shower faucet J1 or hot water faucet J2 to supply hot water respectively. is the usual law.

However, as is clear from the above configuration, when the three-way switching valve ■ is switched from the steam outlet side of the bathtub to the shower faucet J1 or hot water supply faucet J2 side, the hot water supply circuit from the heat exchanger E to the switching valve ■ Since the steam and hot water generated before switching remain, the steam and hot water will flow out at the beginning of switching, and as a result, there is a danger that the user may suffer burns.

As one measure to eliminate the above-mentioned drawbacks, the applicant of the present application has proposed, for example, the patent application No.
According to the invention of No. 1, by providing a steam mixing device in the middle of the latter circuit between the steam supply circuit to the bathtub and the appropriate temperature hot water supply circuit to the shower and hot water faucet, it is possible to prevent water from flowing into the latter circuit, especially at the time of circuit switching. We proposed a steam-generating water heater configured to mix cold water with steam or hot water.

By installing the above-mentioned steam/water mixer, the problem of steam or hot water flowing out at the time of switching from the steam supply circuit to a hot water supply circuit such as a shower or a hot water faucet has been solved to a certain extent.

The present invention provides a solution to the problem of the risk of being burned by hot water during the initial stage of hot water supply to the shower, as described above, by yet another advantageous method. The switching mechanism from the supply circuit to the hot water supply circuit of the shower or hot water faucet is configured to operate with a slight delay due to the switching operation using an operating knob, etc., and the switching mechanism remains in the piping during the delayed operation period of the switching mechanism. The structure is configured so that steam or hot water is effectively used by flowing into the bathtub, and only water at an appropriate temperature flows out to the shower or hot water faucet.
The point is that it is possible to prevent troubles caused by the so-called "post-boiling" described above.

The present invention embodies the above basic concept as a delay switching mechanism that can be used in a water heater capable of generating steam. and a water reservoir chamber communicating with the atmosphere or either one of the first and second drainage holes;
A diaphragm that is divided into two chambers and is operated by the pressure of hot water introduced into one of the chambers, and a 10th and second drainage hole that is provided across the drain hole and that operates integrally with the diaphragm, A valve body that closes one of the drainage holes to switch the flow path and opens and closes a communication path between the water storage chamber and the atmosphere or either the first or second drainage hole to vary the water pressure in the water storage chamber. and a bleed valve that operates the diaphragm when the flow path is switched, and the valve body that switches the flow path is configured to normally close the second drain hole and close the first drain hole when switching. It is characterized by what it did.

Hereinafter, preferred embodiments of the present invention will be described in detail.

In Figure 1, 1 is a gas water heater capable of generating steam installed at an appropriate location outside the bathroom, 2 is a bathtub, and 3 is a shower.
These are connected by pipes 5, 6.7 via a delay switching mechanism 4, and the hot water flowing from the gas water heater 1 through the pipe 5 is supplied to the pipe 8 or 7 by the delay switching mechanism 4.
It is supplied to the bathtub 2 or shower 3.

Water and gas are supplied to the gas water heater 1 through piping 8.9.

10 is a remote control device for remotely controlling the pilot ignition of the gas water heater 1 and the switching operation of the delay switching mechanism 4;
Attached to 1.

As shown in FIG. 2, this remote control device 10 has an operation section 12 for gas control and an operation section 13 for water control, and each operation section 1213 has an operation knob 12a, 13a and an operation shaft 12b, 13b. The operating shafts 12b and 13
As shown in Fig. 3, one operating shaft, e.g. the control operating shaft 13b, is an inner shaft with a plurality of ribs projecting from the outer periphery of a cylindrical shaft member, and the other operating shaft, e.g. gas control The operating shaft 12b is an outer shaft with a plurality of ribs protruding from the outer periphery of a cylindrical shaft member, and has a uniaxial structure in which these ribs are arranged concentrically and independently rotatable. The operating shafts 12b and 13 are made to protrude from the side of the shaft 10a and penetrate through the side wall 14, and each operating shaft 12b, 13 is attached to the protruding end thereof as shown in FIG.
An interlocking mechanism 15 that engages with b and operates the gas water heater 1 in conjunction with these is attached.

The operating knobs 12a, 13a and the operating shafts 12b, 13b are connected by bevel gears 16a, 16b, 17a, 17b.

As shown in FIGS. 5 to 7, the delay switching mechanism according to the present invention used in the gas water heater of this example with the above structure has one water supply hole 19 in the pulp body 18 and a water supply hole communicating with the water supply hole 19. 1. It has second drainage holes 20 and 21 and a water reservoir chamber 22, and the water reservoir chamber 22 has a small diameter introduction hole 23 branched from a part of the water supply hole 19 and an outlet hole 24 opened to the atmosphere. It's communicating.

The water supply hole 19 is connected to the pipe 5 communicating with the gas water heater 1, the first high temperature side drain hole 20 is connected to the pipe 6 communicating with the bathtub 2, and the second low temperature side drain hole 21 is connected to the pipe 6 communicating with the bathtub 2. 3
It is connected to the piping 7 which communicates with.

Reference numeral 25 designates a high-pressure safety valve that is branched into the water supply hole 19, and when the pressure inside the water supply hole 19 becomes high, the ball 26 is pushed outward against the pressure setting spring 27 by the pressure, and the flow path is closed. Open valve 25a and supply hot water etc. to valve body 1.
8 to the outside to lower the pressure inside the water supply hole 19.

When the pressure decreases, the ball 26 is activated by the pressure setting spring 2.
7 to automatically return and close the flow path 25a.

28 is a diaphragm provided to divide the water reservoir chamber 22 into two chambers 22a and 22b, which introduces hot water etc. only into one introduction chamber 22a and does not introduce it into the other chamber 22b.
It operates against the spring 29 due to pressure fluctuations of the introduced hot water or the like.

Hot water, etc. introduced from the water supply hole 19 to the introduction chamber 22a via the introduction hole 23 is discharged to the outside of the valve body 18 via the outlet hole 24, and no pressure fluctuation occurs within the introduction chamber 22a.
When the bleat valve 30, which is slidably fitted into the outlet hole 24, is pushed in and the outlet hole 24 is closed, hot water, etc. accumulates in the introduction chamber 22a, and the pressure increases and the diaphragm 28
is activated.

Reference numeral 31 designates an elastic valve body provided across the two drainage holes 20 and 21, and is attached to the tip of a sliding rod 32 that is slidably provided within the valve body 18. With the movement of the sliding rod 32, the drain holes 20 and 21 are closed, and hot water etc. flowing from the water supply hole 19 is supplied to the bathtub 2 or the shower 3.

The rear part of the sliding rod 32 protrudes into the other chamber 22b of the water reservoir chamber 22, and is pressed to the right in the figure by a spring 34 compressed between a washer 33 attached to the rear part and the valve body 18. Then, the valve body 31 normally closes the drain hole 21 leading to the shower, the bleed valve 30 is closed, the pressure inside the introduction chamber 22a increases, the diaphragm 28 is activated, and the sliding rod 32 is moved by the spring 34. When the valve body 31 is pushed to the left side in the figure against the pressure, the valve body 31 moves and opens the drain hole 21 side, and closes the drain hole 20 leading to the bathtub 2 (see FIG. 8).

Reference numeral 35 denotes a delay setting needle valve provided in a part of the introduction hole 23, which adjusts the opening area of the introduction hole 23, controls the flow rate of hot water flowing therethrough, and sets the operating time of the diaphragm 28.

36 is a hot water temperature adjustment mechanism that adjusts the temperature of hot water supplied to the shower 3. At a predetermined time, an adjustment rod 36a is pushed in against a spring 37 to project into the drain hole 21 to control the flow rate of hot water. The temperature is adjusted by controlling the amount of hot water supplied from the boiler 1.

The bleed valve 30 and hot water temperature adjustment mechanism 36 are connected to the control shaft 13b of the remote control device 10, as shown in FIG.
It is operated by.

That is, the bleed valve 30 is connected to the operating shaft 1 via the link mechanism 38.
The bleed valve 30 is operated by a first cam 39 provided at the cam 3b, and is open when the link mechanism 38 is in contact with the cam 39, and closed when released.

The hot water temperature adjustment mechanism 36 is operated by a second cam 42 provided on the operating shaft 13b via a pushing rod 41 that is slidably supported by a support bracket 40.

As shown in FIG. 9, the operating knob 13a for operating the water control operating shaft 13b is rotated clockwise from the "stop" to the "bath" (reheating) counterclockwise direction by 1" (shower water supply). )", and the gas control knob 1
2a is ``Ignition'', °°(
Capacity) small", °° (persimmon power) dog'", and work is done by setting it in each position.

In addition, in the range a where the operating knob 13b is rotated slightly counterclockwise from "reheat" to "stop", the first cam 39 is in contact with the link mechanism 38, and the bleed valve 30 is opened. I'm talking.

To explain the operation of the above configuration, first, set the water control knob 13a to 'off', close the water tap to stop the water supply, and then turn the gas control knob 12a to 'stop'. Turn the pilot light of the gas water heater 1 to the ``ignition'' position and turn the operating knob 12a to the ``small'' or ``dog'' position to turn on the gas water heater 1. make it available for use.

In this state, turn the water control knob 13a into the "bath" position.
, open the water valve, and connect the gas water heater 1 to the pipe 5.
The hot water is supplied to the valve body 18 through.

Then, the hot water that has flowed through the water supply hole 19 flows to the open drain hole 20 and is supplied to the bathtub 2 via the piping 6.

Here, a part of the hot water flowing inside the water supply hole 19 enters the introduction chamber 22a of the water reservoir chamber 22 from the introduction hole 23, and further flows to the outlet hole 24, but the bleed valve 30 is open and the introduction hole
is open to the atmosphere, the hot water is released into the atmosphere, does not stagnate in the introduction chamber 22a, and no pressure fluctuation occurs in the introduction chamber 22a, so the diaphragm 28 and the sliding rod 32 do not operate. The valve body 31 closes the drain hole 21 leading to the shower 3 and opens the drain hole 20 leading to the bathtub 2, so that hot water does not flow to the shower 3 but flows to the bathtub 2.

When a predetermined amount of hot water accumulates in the bathtub 2, the operating knob 13
a is set to ``P-reheat'', steam is generated in the gas water heater 1, and is supplied to the valve body 18 via the piping 5.

Then, in this case as well, the hot water is supplied only to the bathtub 2 and heats the hot water in the bathtub 2, as described above.

When the temperature of the hot water reaches a predetermined temperature, the operating knob 13a is turned off.
Rotate back to the stop ''' and stop supplying steam and hot water.

When using the shower 3, turn the operating knob 13a'
It is rotated slightly toward the hot water supply side, the bleed valve 30 is closed, and the gas water heater 1 generates hot water, which is supplied to the pulp body 18 via the pipe 5.

Then, the outlet hole 24 is closed, and the water supply hole 19 is connected to the introduction hole 2.
The hot water flowing into the introduction chamber 22a through 3 is stagnant here,
When the water is filled and the pressure increases, the diaphragm 28 is pressed and moved to the left in the figure against the spring 29, and the sliding rod 32 is further moved against the spring 34 to move the valve body 31. Close the drain hole 20 leading to the shower 3.
The drainage hole 21 leading to the water supply hole 19 is opened, and the hot water flowing into the water supply hole 19 is supplied to the Java 3 and discharged.

Here, the time from when the bleed valve 30 closes until the valve body 31 starts moving is a delay time, and during this time, the hot water supplied to the water supply hole 19 flows to the open drain hole 20 and flows into the bathtub 2. is supplied, and as the valve body 31 moves, the shower 3
is switched to and supplied.

When the operating knob 13a of the shower 3 is returned to the "stop" position after use, the hot water supply operation is stopped, the bleed valve 30 is opened, the introduction hole 24 is opened, and water can be discharged, and the diaphragm 28 and Both the sliding rod 32 and the spring 2
9.34, the valve body 31 moves to close the drain hole 21 leading to the shower 3 and open the drain hole 20 leading to the bathtub 2.

To use the shower 3 again, turn the operating knob 13a slightly to ``Hold water supply'' and close the bleed valve 30.

Then, similar to the above, the valve body 31 moves after a predetermined time delay,
A drain hole 20 leading to the bathtub 2 is closed, a drain hole 21 leading to the shower 3 is opened, and hot water is supplied to the shower 3 and water is discharged.

When the shower operating knob 13a is further rotated counterclockwise, the push rod 41 is pushed to the left in the figure by the second cam 42 provided on the operating shaft 13b, and the adjustment lever of the hot water temperature adjustment mechanism 36 is pushed. 36a is pushed inward and protrudes into the drain hole 21, and controls the flow rate of hot water flowing through the drain hole 21 to raise the temperature, so the temperature can be adjusted to a desired temperature.

Note that during the delay time from when the bleed valve 30 closes until the valve body 31 operates, hot water accumulated in the piping 5 and accumulated in the heat exchanger of the gas water heater 1 are heated. This can be done by adjusting the protrusion amount of the delay time setting needle valve 35 provided in the introduction hole 23 to control the flow rate of the hot water flowing therethrough. What is necessary is to set the time for the introduction chamber 22a to be filled with hot water.

When using the shower 3 by operating the operating knob 13a from ``bath'' or ``reheating'' to ``hot water supply'' as described above and switching the delay switching mechanism 4 from bathtub 2 to shower 3, Since the switching is delayed and the high-temperature hot water accumulated in the gas water heater 1 and piping 5 is discharged into the bathtub 2 during this time, high-temperature hot water and steam do not inadvertently flow out from the shower 3.

In addition, the operating knob 13a is closed, and the drain hole 20 of the pulp body 18 leading to the bathtub 2 is opened when the water supply is stopped, and when the pulp body 18 is rotated to the "hot water supply" state, the pulp body 18 is opened.
Since the shower 8 is switched to the shower 3 with a delay, the so-called after-boiling hot water will not inadvertently flow out from the shower 3 as described above.

As explained above, the present invention includes one water supply hole, first and second drainage holes that communicate with the water supply hole, and a water reservoir that communicates with the water supply hole and either the atmosphere or one of the first and second drainage holes. a pulp body having a chamber; a diaphragm that divides the water reservoir chamber into two chambers and is operated by the water pressure of hot water introduced into one of the chambers; and a diaphragm provided across the first and second drainage holes,
a valve body that operates integrally with the diaphragm and closes either the first or second drainage hole to switch the flow path; A bleed valve that opens and closes a communication path with the hole and operates the diaphragm by varying the water pressure in the water reservoir chamber, and the valve body that switches the flow path is normally configured to close the second drain hole. None, since the first drain hole is closed when switching, the bleed valve is closed when switching, the hot water flowing in the water reservoir is stagnant, increasing the water pressure, and the diaphragm is activated to move the valve body. Since it takes a certain amount of time to switch the open state of the drain hole, it is recommended to install this delay switching mechanism in the piping that connects the gas water heater and the bathtub, shower, or hot water faucet. Even if you switch the flow path after supplying high-temperature water or steam from the gas water heater to the bathtub and immediately supply hot water to the shower or hot water faucet, hot water may inadvertently leak out when using the shower or hot water faucet. It is safe because hot water at an appropriate temperature can be taken out from the beginning of use without escaping or steam, and the invention is highly effective in practical use.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment using a delay switching mechanism according to the present invention, FIG. 2 is a partially cutaway plan view showing a remote control device, and FIG. 3 is a cross-sectional view taken along line C-C in FIG. 4. , FIG. 4 is a side view showing the mounting structure of the delay switching valve main body and interlocking mechanism according to the present invention, FIG. 5 is a sectional view taken along line C-C in FIG. 4, and FIG. A sectional view, FIG. 7 is a sectional view taken along line C-C in FIG. 4,
Fig. 8 is an explanatory diagram of the operation of the delay switching valve, Fig. 9 is a front view showing the operation of the operating knob of the remote control device, and Fig. 10 is the structure of the main part of a conventional gas water heater capable of generating steam. FIG. 4... Delay switching mechanism, 18... Valve body, 19...
...Water supply hole, 20...First drainage hole, 21...Second
Drain hole, 22...Water storage chamber, 23...Introduction hole, 24
... Outlet hole, 28... Diaphragm, 30... Bleed valve, 31... Valve body.

Claims (1)

[Claims] 1 One water supply hole and the first hole communicating with it. - A valve body having a second drain hole and a water reservoir chamber that communicates with the water supply hole and the atmosphere or with either the first or second drain hole;
The water storage chamber is divided into two chambers, and a diaphragm is operated by the water pressure of hot water introduced into one of the chambers, and a diaphragm is provided across the first and second drainage holes and operates integrally with the diaphragm. and a valve body that closes either the first or second drain hole to switch the flow path, and a valve body that opens and closes a communication path between the water reservoir chamber and the atmosphere or either the first or second drain hole. and a bleed valve that operates the diaphragm by varying the water pressure in the water storage chamber, and the valve body that switches the flow path is configured to normally close the second drain hole, and when switching, A delay switching mechanism usable in a water heater capable of generating steam, characterized in that the drain hole is closed.