JPH0141089Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of an operation button that is biased toward the return position by a return spring, and a lock that switches the operation button between a pressed position holding state and a pressed position holding released state in response to the pressing operation. A push-type operation device having a mechanism is provided, and a valve for opening and closing a water supply channel to the water boiler is interlocked with the operation button by a lever-type interlocking mechanism, so that the valve is closed when the operation button is in the return position, and This invention relates to a water control device for a gas water heater that is configured to be opened when in the push position and allows water supply operation to be easily performed with just one touch operation on an operation button.

Conventionally, in the above-mentioned water control device, the operating stroke of the operating button cannot be made very large due to operability constraints, so the lever ratio of the lever-type interlocking mechanism cannot be set sufficiently large. There was a problem in that the operation button was difficult to operate against the water supply pressure acting on the valve.

Therefore, when configuring a valve for opening and closing the water supply channel, as shown in FIG. 44, and by opening and closing the sub-valve body 45 for the small hole 44 by operating the operation button, the orifice small hole 4
6, the internal pressure balance between the diaphragm low-pressure side chamber 43 and the upstream side chamber 47 of the annular valve seat 41 is changed to open and close the diaphragm valve body 40 relative to the annular valve seat 41. The sub-valve element 45 has a smaller pressure-receiving area in the direction of the valve element surface than the valve element 40 and has a smaller water supply pressure that acts as resistance when opening and closing.
By manipulating only the
A device has been proposed in which the operation button can be operated easily against the water supply pressure.

In the figure, reference numeral 48 denotes a spring that closes and biases the sub-valve body 45.

However, since the diaphragm valve body 40 is made of a flexible material such as rubber, there is a problem in terms of durability, and the orifice small hole 46 is easily clogged with foreign matter such as dust, and the clogging may cause malfunction. There is a problem in that there are many defects, and furthermore, when water is drained from the water supply channel to prevent freezing, water remains in the diaphragm low-pressure side chamber 43, and the remaining water freezes, causing unexpected damage.

An object of the present invention is to eliminate the disadvantages of the diaphragm type valve described above while making it possible to easily operate the operation buttons.

The characteristic configuration of the water control device for gas water heaters according to the present invention is that, in the valve that opens and closes the water supply channel, a spring is provided to bias the main valve body, which contacts the annular valve seat on the valve box side from the upstream side, toward the opening side. , a sub-valve body that opens and closes a small hole formed in the main valve body so as to communicate the upstream side chamber and the downstream side chamber of the annular valve seat in the closed state, in conjunction with an operation button, and a spring located within the upstream chamber and biasing the sub-valve element toward the small hole closing side;
The biasing force is set so as to maintain the closed state of the main valve element and the sub-valve element against the main valve element biasing spring, and its functions and effects are as follows.

In other words, to explain the operation of the valve, as shown in FIG. 3, the valve is maintained in the closed state by the set biasing force balance between the spring 36 for biasing the sub-valve body 33 to close and the spring 31 for biasing the main valve body 30 to open. In addition, by operating the operation button 8 to close the sub-valve body 35 and opening it against the biasing spring 36 as shown in FIG. The side chamber 32 and the downstream chamber 33 are communicated with each other, and as the water supply pressure that acts on the main valve body 30 to close it decreases, the main valve body 30 is moved as shown in FIG. 5 by the biasing force of the opening biasing spring 31. As shown, it opens automatically.

Therefore, only the sub-valve element 35, which has a smaller pressure-receiving area in the direction of the valve element surface than the main valve element 30 and has a smaller water supply pressure that resists when opening and closing, is operated in conjunction with the operation button 8, so that it resists the water supply pressure. The operation of the operation button 8 can be performed extremely lightly.

Moreover, since the main valve body 30 can be made of a rigid material, durability can be greatly improved compared to a conventional diaphragm valve body, and the small orifice hole required in the case of a diaphragm valve body can be omitted. This made it possible to reliably avoid malfunctions caused by clogging of the orifice.

Furthermore, by arranging the sub-valve body 35 in the upstream chamber 32 of the annular valve seat 29, the space A in the valve box where the sub-valve body 35 is located in the valve open state (in the diaphragm valve described above, the diaphragm low pressure The space corresponding to the side chamber) becomes the original valve flow path that communicates the upstream water supply channel 11 and the downstream water supply channel 11, so when draining water to prevent freezing, the sub valve body 3
The water in the space A in the valve box where 5 is located can be easily and reliably drained from the normal drain valve 37 connected to the water supply channel 11 without providing a special drainage channel. It is now possible to prevent unexpected valve damage due to residual water freezing.

In short, it has excellent operability, and
A water control device for gas water heaters has been created that has excellent durability, operability, and anti-freezing properties.

Next, embodiments will be described based on the drawings.

As shown in FIGS. 1 and 2, a main gas burner 3 operated by a push-type ignition operating tool 1 and a push-type extinguishing operating tool 2 is housed in a casing 4, and hot water is discharged from the tip of a discharge pipe 5. A water tube type heat exchanger 7 to which a water tube type heat exchanger 7 is connected is arranged in the combustion chamber of the main gas burner 3, and a water control valve 10, which is opened and closed by a push type operation device 9 equipped with an operation button 8, is connected to a water tube type heat exchanger 7. It is interposed in the water supply conduit 11 to the exchanger 7, thereby configuring an instantaneous gas water heater.

In the figure, 12 is a pilot burner, 13 is a side pilot burner, 14 is a sensor that detects the flame of the pilot burner 12, and 15 is a
This is an electromagnetic safety gas valve that maintains an open state only when the pilot burner is ignited based on information from the sensor 14.

Further, 16 is a main gas valve 1 which is manually opened and closed by the ignition operating tool 1 and the fire extinguishing operating tool 2.
7 is a water supply channel 11 on the downstream side of the water control valve 10;
19 is a water flow responsive valve that opens the gas supply path G only when the detected water flow exceeds a set value in conjunction with a water flow detector 18 that detects the flow of water at the main gas burner 3. This is a gas valve for switching capacity.

The water supply channel 11 downstream of the water supply amount detector 18 and the discharge pipeline 5 are short-circuited by a bypass pipeline 21, and the flow rate control valve 23 whose opening degree is adjusted by a sliding operating tool 22 is connected to the bypass pipeline. It is installed in the passage 21, and is configured to adjust the temperature of the discharged hot water by changing the amount of water that is merged and supplied to the discharged hot water by operating the regulating valve 23 thereof.

The operation structure of the water control valve 10 includes a third
As shown in the figure, the push-type operation device 9 is provided with a sliding member 24 that protrudes in conjunction with the push operation of the operation button 8 and retracts in conjunction with the return displacement of the operation button 8. Sliding member 2
A lever-type interlocking member 26 is provided which swings and displaces against the biasing spring 25 due to the protruding displacement of the water control valve 10 due to contact with the lever-type interlocking member 26. A water control valve 1 is provided at the end thereof and is biased to be closed by the swinging displacement of the lever-type interlocking member 26 accompanying the protruding displacement of the sliding member 24.
0 is interlocked and connected so that it can be operated to open.

The operation button 8 is always urged toward the return position via the sliding member 24 by the spring 25 that urges the lever-type interlocking member 26.
The push-type operating device 9 is equipped with a locking mechanism 28 that sequentially and automatically switches between the push position holding state and the push position holding release state in response to the push operation. It is configured such that the water control valve 10 can be sequentially opened and closed by only a push operation.

To configure the water supply channel opening/closing structure of the water control valve 10, as shown in FIGS. 3 to 5, the main valve body 3 contacts the valve box side annular valve seat 29 from the water supply upstream side.
A small hole 3 is provided in the main valve body 30 to communicate the upstream chamber 32 and the downstream chamber 33 of the annular valve seat 29 in the closed state.
4, and a sub-valve body 35 for opening and closing the small hole 34 is concentrically interlocked with the valve operating rod 27 and arranged substantially concentrically with the main valve body 30. It is provided within the upstream chamber 32.

The second valve urges the sub-valve body 35 toward the small hole closing side.
The spring 36 is provided with a biasing force set such that its biasing force resists the biasing force of the first spring 31 and maintains the closed state of the main valve body 30 and the sub-valve body 35. and second spring 3
1 and 36 to maintain the valve closed state as shown in FIG. 3, and by operating the operation button 8, the auxiliary valve body 35 is moved against the second spring 36 as shown in FIG. By operating the opening operation as shown in FIG. The main valve body 30 is configured to be automatically opened and operated as shown in FIG.

Furthermore, it goes without saying that the open state of the sub-valve body 35 is maintained by the action of the lock mechanism 28 to maintain the operating button in the pressed position.

In addition, reference numeral 11a in the figure is the discharge port of the water supply channel 11 connected to the upstream chamber 32, and by arranging the sub-valve body 35 in the upstream chamber 32 as described above, the sub-valve body 35 is opened when the water control valve is opened. The space A in the valve box where is located becomes the original flow path in the valve box that communicates the upstream water supply channel 11 and the downstream water supply channel 11, and in order to prevent freezing, from the water supply channel 11 When draining water, the water in the valve box of the water control valve 10 can be reliably drained from the drain valve 37 connected to the water supply channel 11.

Next, another embodiment will be described.

The specific shape and structure of the main valve body 30 that contacts the valve box side annular valve seat 29 from the upstream side, and the small hole 34 formed therein are connected to the upstream side chamber 32 of the annular valve seat 29.
Various improvements can be made to the specific shape and structure of the sub-valve body 35 that opens and closes within the valve body.

Spring 31 that urges the main valve body 30 toward the opening side
and a spring 36 that biases the sub-valve body 35 toward the closing side.
The specific biasing force ratio between the main valve body 30 and the sub-valve body 35 can be changed as appropriate within the range in which the closed state of the main valve body 30 and the sub-valve body 35 is maintained by the balance of the biasing forces of the springs 31 and 36 in the valve closing operation state. be.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a diagram of a gas water heater, FIG. 2 is a schematic circuit diagram thereof, and FIGS. 3 to 5 are valve valves, respectively. It is a sectional view showing an operating state. FIG. 6 is a diagram showing a conventional valve structure. 7...Water boiler, 8...Operation button, 9...Push type operating device, 10...Valve, 11...Water supply,
25...Spring, 26...Lever type interlocking mechanism,
29...Annular valve seat, 30...Main valve body, 31...Spring, 32...Upstream chamber, 33...Downstream chamber, 34...Small hole, 35...Sub-valve body, 36...Spring.

Claims (1)

[Scope of utility model registration request] A push-type operating device that has an operation button 8 urged toward the return position by a return spring 25, and a lock mechanism 28 that switches the operation button 8 between a pressed position holding state and a pressed position holding release state as the operating button 8 is pressed. 9 is provided, and a valve 10 for opening and closing the water supply channel 11 to the water heater 7 is linked to the operation button 8 by a lever-type interlocking mechanism 26, so that the valve 10 is closed when the operation button 8 is in the return position, The water control device for a gas water heater is configured to be opened when the valve is in the push position, and in the valve, the main valve body 30 that contacts the valve box side annular valve seat 29 from the upstream side is set to the open side. Spring 3 that biases
1, and the main valve body 30 has an upstream chamber 32 and a downstream chamber 3 of the annular valve seat 29 in its closed state.
A sub-valve body 35 for opening and closing the small hole 34 formed to communicate with the small hole 34 is provided in conjunction with the operation button 8 and located within the upstream chamber 32. The spring 36 that biases the valve body 35 toward the small hole closing side is set to have a biasing force so as to maintain the closed state of the main valve body 30 and the sub-valve body 35 against the main valve body biasing spring 31. A water control device for a gas water heater.