JPH0253691B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a main burner and a pilot burner, and a main gas passage connected to the main burner includes a cutoff valve located upstream of a branch of the pilot gas passage, and a shutoff valve located at the branch part of the pilot gas passage. The present invention relates to an operating device that is located on the upstream side and has an on-off valve interposed therein, and is applied to a gas appliance such as a gas instantaneous water heater that ignites the main burner by the transfer of flame from the pilot burner.

Conventionally, this type of device has been provided with a first operating member that opens a shutoff valve to ignite the pilot burner, and a second operating member that opens and closes the on-off valve to ignite and extinguish the main burner, which are independent of each other. However, in this device, the second operating member is sometimes operated to the open position before the first operating member, and in this case, when the first operating member performs the ignition operation, the main burner is turned off. A large amount of gas is released, causing an explosion and ignition.
Also, even if the second operating member is in the open position, the first
When the operating member is returned to the stop position, the main burner and the pilot burner are extinguished, resulting in the inconvenience that the on-off valve may be mistakenly thought to have been opened or closed and may be forgotten to close.

In order to eliminate this inconvenience, the present invention provides that when the first operating member performs an ignition or extinguishing operation while the second operating member is in the open position, the second operating member automatically returns to the closed position. The object of the present invention is to provide a device which is equipped with a main burner and a pilot burner, and a main gas passage leading to the main burner has a branch part upstream of the pilot gas passage leading to the pilot burner. A gas appliance that includes a shutoff valve located on the side and an on-off valve located upstream of the branch part, the main burner being ignited by flame transfer from the pilot burner, the shutoff valve a first operation member that opens and closes the
A second operating member for opening and closing the on-off valve is provided independently from each other, and the second operating member is pushed from a closed position to an open position against a return spring, and a locking mechanism is engaged in the open position. In the case where the second operating member is locked by a locking member therein, and the second operating member is released from the locking by the locking mechanism by operating the second operating member and returns to the closed position, the second operating member returns to the closed position. A release mechanism is provided between the member and the second operating member to move the locking member provided in the locking mechanism to the release position in the middle of the operation in conjunction with the valve opening and closing operations of the first operating member. It is set up.

Next, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 shows an embodiment in which the device of the present invention is applied to a gas instantaneous water heater, in which an pilot burner 2a is installed in parallel on the side of a main burner 2 that heats a water heat exchanger 1, and is connected to the main burner 2. In the main gas passage 3 connected to the pilot burner 2a, there is a cutoff valve 4 located upstream of the branch of the pilot gas passage 3a, and a shutoff valve 4 located downstream of the branch, which connects the pilot gas passage 3a to the water heat exchanger 1. An on-off valve 6 that is opened in conjunction with the water governor 5 when water is running is interposed, and an ignition valve 7 and an ignition gas passage 3b are provided, which are made up of a small part formed on the valve rod 4a of the shutoff valve 4. An ignition burner 2b to which gas is supplied through the ignition burner 2b is provided, and by actuation of an igniter 8 facing the ignition burner 2b, transfer ignition is provided to the pilot burner 2a via the ignition burner 2b, Further, an electromagnetic safety valve 10 controlled by a thermocouple 9 facing the pilot burner 2a is provided upstream of the shutoff valve 4.

In the drawings, reference numeral 11 indicates a first operating member that opens the cutoff valve 4 and ignites the pilot burner 2a, and the member 11 is provided coaxially and rearward with the valve rod 4a of the cutoff valve 4. It is composed of an operating rod 11b with a push button 11a, and a push mechanism 12, which will be described later, is assembled to the operating rod 11b, and the first operating member 11 is moved from the stop position A to the front ignition as shown in FIG. It can be returned to position B by pressing against the spring 11c, and when the pressure is released at the ignition position B, it is locked at the intermediate firing position C, and when it is pressed again from the firing position C, it is locked. When the lock is pushed to the lock release position D slightly forward, the lock at the firing position C is released and the lock is returned to the stop position A. Furthermore, as shown in FIG. Switch 13 and
A hold switch 1 for forcing a discharge current from a capacitor 14 to flow through a solenoid 10a of an electromagnetic safety valve 10 to forcibly hold the safety valve 10 in a state for a certain period of time.
5, and each switch 13, 15 is connected to the first
As shown in FIGS. 3 and 3, the first operating member 11 is arranged so as to come into contact with the protrusions 13a and 15a on the operating rod 11b to be operated, and thus to press the first operating member 11 from the stop position A to the ignition position B. 7, the shutoff valve 4 begins to open at point A in FIG.
The discharge to a starts, and the electromagnetic safety valve 10 begins to be pressed open via the lever 16 that comes into contact with the valve rod 4a at point C, which is beyond the firing position C, and then the ignition valve 7 is opened at point 2. At the same time as starting, the ignition switch 13 is closed and the igniter 8 is actuated, providing transfer ignition to the pilot burner 2a via the ignition burner 2b. After this ignition, when the pressing operation is released and the first operating member 11 is returned to the firing position C, the operation of the igniter 8 is stopped, the ignition valve 7 is closed, the ignition burner 2b is extinguished, and the starter burner 2b is extinguished. Only the burner 2a burns, and the electromagnetic safety valve 10 is forcibly held open for a certain period of time due to discharge from the capacitor 14.
During this time, the thermocouple 9 is heated to a predetermined temperature, and the safety valve 10 is held open unless a misfire occurs due to the electromotive force of the thermocouple 9.

The push mechanism 12 includes a fixed frame 17.
The engaging element 18, which is swingably attached to the operating rod 11b,
The guide groove 20 is elastically inserted and locked by a spring 18a into a guide groove 20 on a guide plate 19 attached to the first operating member 11, as shown in FIGS. Each operation position A, B, C, D
The first step of the stepped shape connecting the points a to d corresponding to
The fourth grooves 20a, 20b, 20c, and 20d are formed in a loop shape, and when the first operating member 11 is pressed from the stop position A to the ignition position B, the engagement is caused by the advancement of the guide plate 19. The engaging element 18 is moved from point a to point b via the first groove part 20a, and when the pressure is released at the ignition position B, the engaging element 18 follows the guide plate 19 and moves to point c via the second groove part 20b.
The first operating member 11 is moved to the hot firing position C.
When the engaging element 18 is then pressed from the hot firing position C to the unlocked position D and released, the engaging element 18 moves through the third groove 20c to point d, and then to point d.
The first operating member 11 is moved from the point to the point a via the fourth groove portion 20d, and the first operating member 11 is given a return operation to the stop position A.

The on-off valve 6 is opened when water is flowing as described above, and therefore the second operating member 21 opens and closes it.
is composed of an operating member for the water flow valve 22 shown in FIG.

The second operating member 21 has an operating rod 21b with a push button 11a and is configured in a push-button type similar to the first operating member 11, and a push-button locking mechanism 23 is attached to the operating rod 21b. This is the first
As shown in Figure 0, the return spring 21c from the closed position A'
It is possible to freely switch from the pressing end position B' to the open position C' by pressing against the pressure, and from the unlocking position D' to the closed position A' by pressing again from the open position C', At the open position C', the water passage valve 22 is held open, and as a result, water flows and the burner 5 causes the opening/closing valve 6 to be opened.

A locking mechanism 23 consisting of the push mechanism
Similar to the push mechanism 12 of the first operating member 11 described above, a locking member 25 attached to a fixed frame 24 so as to be swingable is attached to a guide groove 27 on a guide plate 26 attached to an operating rod 21b with a spring 25a. The guide groove 27 is elastically inserted and locked.
As shown in FIGS. 8 and 9, the second operating member 2
Corresponding to each of the above operating positions A', B', C', and D' of 1.
It is formed into a loop shape consisting of stepped first to fourth grooves 27a, 27b, 27c, and 27d connecting each point a' to d', and the second operating member 21 is pressed from the closed position A'. According to , the locking member 25 is at point a'→
In the order of first groove part 27a → point b' → second groove part 27b
The second operating member 21 is moved to point c' and the second operating member 21 is in the open position.
C', and then by pressing again from the open position C', the locking member 25 is moved to the third groove 27c.
→ Point d' → The second operating member 21 is returned to the closed position A' by being moved to a' along the route of the fourth groove portion 27d.

Here, the present invention provides that the locking mechanism 23 is provided between the first operating member 11 and the second operating member 21 in conjunction with the valve opening and closing operations of the first operating member 11. A release mechanism 28 is provided to move the locking member provided at the holder to the release position, and when the first operation member 11 is pressed, the second operation member 21 is automatically returned to the closed position during the operation. To explain, the release mechanism 28 is the locking mechanism 23
The direction in which the locking member 25 that engages with point c' of the guide groove 27 provided in the guide groove 27 to keep the second operating member 21 in the open position is disengaged in conjunction with the pushing operation of the first operating member 11; The operating rod 29 is a fixed frame 3 provided between the operating members 11 and 21.
The cam protrusion 33 provided on the operating rod 11b of the first operating member 11 engages with the left end pin 32 of the first operating member 11 so that the first operating member 11
It is configured to move to the left against the spring 31 in conjunction with the pushing operation of the operating member, and when the operating rod 29 moves to the left due to the pushing operation of the first operating member 11, the claw 29d provided at the right end thereof Then, the engagement of the locking member 25 with the point c' of the guide groove 27 is released.

In addition, the two members 29a and 29b on the left and right sides of the operating rod 29
Both members 29a and 29b are connected with a play in the length direction of the operating rod 29 by a long hole 29c provided in one of them and a pin that engages with the long hole 29c provided in the other, thereby eliminating assembly errors. The claw 29d was formed on the right end of the member 29b so that it could be absorbed.

A relatively shallow return groove 27e extending straight from point c' toward a' is formed in the guide groove 27 of the guide plate 26 constituting a part of the locking mechanism 23, and the operating rod 29 The locking member 25 which is removed from the point 'a' is guided by the return groove 27e' so as to reliably return to the position a'.

In addition, a spool valve with both ends protruding outside the waterway is used as the water flow valve 22, so that the operating force thereof can be reduced.

Next, to explain the operation of the device of the present invention, in use, first, the first operating member 11 is pressed from the stop position A to the ignition position B to cause the ignition burner 2a to ignite through the ignition burner 2b. Then, the first operating member 11 is returned to the heating position C to continue burning the pilot burner 2a.After that, if the water flow valve 22 is opened and closed by the second operating member 21, this will be linked. When the on-off valve 6 is opened, the main burner 2 is ignited by the transfer of flame from the pilot burner 2a, and when the on-off valve 6 is closed, the main burner 2 is extinguished and hot water is supplied as appropriate. I can do it.

In this case, if the second operating member 21 is previously switched to the open position C' before the ignition operation by the first operating member 11, the on-off valve 6, which is in the open state when the pilot burner 2a is ignited, A large amount of raw gas is released from the main burner 2 through the main burner 2, causing an explosion and ignition of the raw gas.According to the present invention, the release mechanism 28 is released as described above by pressing the first operating member 11 from the stop position A. In order to release the second operating member 21 from the open position by the locking mechanism 23, the second operating member 21 is automatically returned to the closed position A', the water flow valve 22 is closed, and the opening/closing valve is closed. 6 is opened and closed,
No such explosive ignition occurs.

Also, when the first operating member 11 is returned from the firing position C to the stop position A while the second operating member 21 remains in the open position C', the release mechanism 2 is activated in the same way as described above.
The operating rod 29 forming part 8 moves to the left in the middle of its operation to close the water flow valve 22 and the on-off valve 6, which prevents forgetting to turn off the water and also allows the on-off valve 6 to be left in the opening operation. Inconveniences such as deterioration of ignitability due to air displacement that would otherwise occur are also prevented.

The above has described an embodiment in which the present invention is applied to a gas instantaneous water heater, but the present invention can be similarly applied to gas appliances such as bathtubs in which the on-off valve is directly opened and closed by the second operating member. .

That is, when the first operating member that ignites the pilot burner is pushed, the second operating member that operates the main burner is released from the open position by the locking mechanism, and the main burner is accordingly released. can be closed.

As described above, according to the present invention, between the first operating member and the second operating member, and between the first operating member and the second operating member, the valve opening and closing operations of the first operating member are provided. Since a release mechanism is provided that moves the locking member provided in the locking mechanism to the release position in the middle of the operation in conjunction with the operation, the ignition operation by the first operation member can be performed with the second operation member in the open position. Even if the on-off valve is closed in the middle of the operation, there will be no explosion and ignition, and even when the first operating member is used to extinguish fire, the on-off valve will be closed in the middle of the operation and the on-off valve will be forgotten to close. It has the effect of being safe and free of oxidation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an example of the device of the present invention, FIGS. 2 and 3 are cross-sectional views taken along lines - and -, respectively, in FIG. 1, and FIG. 4 is a circuit diagram of an igniter and an electromagnetic safety valve. FIG. 5 is a plan view of the guide groove of the push mechanism for the first operating member, FIG. 6 is a developed cross-sectional view of the guide groove, FIG. 7 is a line diagram explaining the operation of the first operating member, and FIG. 8 9 is a plan view of the guide groove of the locking mechanism, FIG. 9 is a developed cross-sectional view of this guide groove, and FIG.
FIG. 0 is a diagram illustrating the operation of the second operating member. 2... Main burner, 2a... Pilot burner, 3...
Main gas passage, 3a... Pilot gas passage, 4... Shutoff valve, 6... On-off valve, 11... First operating member, 21
...Second operating member, 28...Release mechanism.

Claims (1)

[Claims] 1 A main burner and a pilot burner are provided, and a main gas passage connected to the main burner includes a shutoff valve located upstream of a branch of the pilot gas passage connected to the pilot burner, and an on-off valve located downstream of the branch. A gas appliance in which the main burner is ignited by flame transfer from the pilot burner, the first operating member opening and closing the shutoff valve, and the second operating member opening and closing the opening/closing valve. are provided independently from each other, and the second operating member is pushed from the closed position to the open position against a return spring, and is locked in the open position by a locking mechanism, and the second operating member is In the device in which the second operation member is operated to release the lock by the locking mechanism and return to the closed position, the first operation member is disposed between the first operation member and the second operation member. An operating device for a gas appliance, comprising a release mechanism that moves a locking member provided in the locking mechanism to a release position in the middle of the operation in conjunction with the valve opening and closing operations of a member.