JPH0330692Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a combustion device such as an instantaneous water heater, and more specifically, a thermocouple that generates an electromotive force by heating by a burner is provided, and a combustion supply path to the burner is provided. Valve opening means interposes a closing biased valve in the ignition/extinguishing operating tool, and opens the valve against the closing force in conjunction with the ignition operation of the ignition/extinguishing operating tool; a spark plug starting means that operates the spark plug in conjunction with each other to cause the spark plug to ignite; and using the electromotive force of the thermocouple as a power source, the valve opened by the valve opening means is closed and maintained in an open state against a biasing force. The present invention relates to a combustion apparatus equipped with an electromagnetic valve-open holding means.

[Conventional technology]

Conventionally, in the above-mentioned combustion apparatus, a close-biased valve, that is, a burner, which is held in an open state by an electromagnetic valve-opening means using an electromotive force of a thermocouple, may unexpectedly go out, or In addition to safety valves that automatically close when the combustion condition deteriorates due to lack of oxygen, etc., the electromotive force of the thermocouple decreases and the closing force is applied to automatically close the valve. A fire extinguishing valve that opens in conjunction with the safety valve is installed in the fuel supply line in series with the safety valve, and when the burner is intentionally extinguished, the fire extinguishing valve is closed. I was trying to operate it.

[The problem that the idea aims to solve]

However, since a fire extinguishing valve is added in addition to the above-mentioned safety valve, the fuel path structure becomes complicated, making the device larger and increasing the cost of the device. Although we aim to simplify operation by linking the spark plug and safety valve as well as the fire extinguishing valve, the operation of the ignition/extinguishing device becomes difficult due to the linked operation of the fire extinguishing valve. There were also some problems.

The purpose of the present invention is to solve the above problems by making reasonable improvements while maintaining the safety function and simplifying the ignition/extinguishing operation.

[Means to solve the problem]

The characteristic configuration of the combustion device according to the present invention is that it is equipped with a thermocouple that generates an electromotive force by heating with a burner,
Valve opening means interposes a closing biasing type valve in the fuel supply path to the burner, and opens the valve against the closing biasing force in conjunction with the ignition operation of the ignition extinguishing operation tool; ignition plug activation means for igniting the ignition plug in conjunction with the ignition operation of the operating tool; and ignition plug activation means for igniting the ignition plug in conjunction with the ignition operation of the operating tool; and an electromagnetic valve-open holding means for holding the valve open, wherein a switch for opening and closing the power supply circuit connecting the thermocouple and the valve-open holding means is provided, and the ignition/extinguishing operation tool In conjunction with the ignition extinguishing operation tool, there is provided a switch link operation means that closes the switch when the ignition operation is performed, and opens the switch when the ignition extinguishment operation tool performs the extinguishing operation.・The effects are as follows.

[Effect]

That is, according to the above characteristic structure, when the ignition extinguishing operation tool is operated to ignite, the valve opening means opens the valve and starts supplying fuel to the burner, and the ignition plug The starting means starts the ignition operation of the spark plug, thereby igniting the burner.

Further, when the valves are opened and the spark plugs are ignited, and the ignition/extinguishing operating tool is used to ignite, the switch in the power supply circuit is closed by the switch link operating means in conjunction with the ignition/extinguishing operating tool; Since power can be supplied from the thermocouple to the valve opening holding means, the valve opened by the valve opening means is opened by the electromotive force generated by the thermocouple upon ignition of the burner. The valve is held in the open state by the holding means, and
Combustion continues.

When the ignition/extinguishing operation tool is operated to extinguish the valve in a combustion state in which the valve is held in the open state by the valve opening holding means with the electromotive force of the thermocouple, the ignition/extinguishing operation tool In conjunction with this, the switch in the power supply circuit is opened by the switch link operating means, and the power supply from the thermocouple to the valve-open holding means is cut off, so that the valve that was held in the open state is closed by a biasing force. The valve closes, and this valve closure cuts off the fuel supply to the burner and extinguishes the burner.

In addition, in a combustion state where the valve is held open by the valve-open holding means using the electromotive force of the thermocouple, if the burner unexpectedly goes out or poor combustion occurs, the ignition/extinguishing operation tool should be used to extinguish the flame. Even if there is no operation and the switch in the power supply circuit remains closed, the valve will no longer be able to be held open by the valve-opening holding means due to a decrease in the electromotive force of the thermocouple due to the flameout or poor combustion, and the valve will automatically close due to the closing force. valve, thereby cutting off the fuel supply to the burner. That is, the safety function against unexpected burner extinguishing and poor combustion is maintained as in the past.

[Effect of idea]

As a result of the above actions, the safety function is maintained at the same level as before, and the ignition and extinguishing operation can be performed with just one operation on each of the ignition and extinguishing operation tools, simplifying the ignition and extinguishing operation. By linking the ignition extinguishing device to a switch in the power supply circuit instead of connecting it to a fire extinguishing valve that is an additional equipment as in the past, this not only simplifies the operation described above, but also makes the operation of the ignition extinguishing device easier than before. As a result, the overall ignition/extinguishing operability has been greatly improved compared to the conventional one.

In addition, in addition to the safety valve that is held open by the electromotive force of the thermocouple, there is no longer a need for a fire extinguishing valve, which was previously installed, making the fuel path structure simpler than before. It has become possible to downsize the device and reduce the cost of the device.

[First Example] Next, a first example will be described based on FIGS. 1 and 2.

FIG. 1 shows the overall configuration of an instantaneous water heater. A movable hot water outlet pipe 3 is connected to a discharge passage 2 extending from a heat exchanger 1 for heating water, and a water supply passage 4 to the heat exchanger 1 is connected to a discharge passage 2 extending from a heat exchanger 1 for heating water. A faucet 5 and a water governor 6 are interposed.

On the other hand, the gas fuel supply path 8 for the main burner 7 has a main valve 9 that is kept open only in a proper combustion state, and a main valve 9 that is opened only when water is properly flowing to the heat exchanger 1. A hydraulic response valve 10 interlocked with the water cabana 6 and a gas governor 11 are interposed in that order from the upstream side.

12 is a pilot burner, 13 is a side pilot burner, and there is a fuel supply path 8 for them.
A and 8B are the main valve 9 and the hydraulic valve 1, respectively.
0, it is branched from the main gas fuel supply path 8.

14 is a spark plug, 20 is a pilot burner 1
2 is a thermocouple that generates a thermoelectromotive force by heating, and 15 is a side pilot burner 13.
16 is a valve for intermittent fuel supply to the water faucet 5
17 is an ignition/extinguishing operating tool.

The main valve 9 includes a spring for biasing the valve to close,
A closing biasing device includes an electromagnetic coil 9A as an electromagnetic valve-open holding means that uses the starting force of the thermocouple 20 as power source power to hold the main valve 9 in an open state against the biasing force of a valve-closing biasing spring. This is a type of electromagnetic valve, and when the pilot burner 12 unexpectedly goes out or combustion failure occurs, the main valve 9 automatically closes with a closing force due to the accompanying drop in electromotive force of the thermocouple 20. By closing the valve, the main fuel supply path 8 is cut off.

Regarding the ignition and extinguishing operation, a valve opening means is provided to open the main valve 9 and the side pilot burner valve 15 in conjunction with the ignition operation of the ignition extinguishing operation tool 17, and the ignition operation linkage of the ignition extinguishing operation tool 17 is provided. In addition, a switch 22 for opening and closing the power supply circuit 21 connecting the thermocouple 20 and the electromagnetic coil 9A serving as the electromagnetic valve opening holding means is provided. , and the switch 22 is linked with the ignition extinguishing operation tool 17 to close the switch 22 when the ignition extinguishing operation tool 17 is operated to ignite, and to open the switch 22 when the ignition extinguishing operation tool 17 is operated to extinguish the fire. is provided.

That is, when the ignition extinguishing operation tool 17 is operated to ignite, the main valve 9 and the side pilot burner valve 15 are opened by the valve opening means, and the spark plug 14 is opened by the ignition plug activation means. The ignition operation is started, whereby the side pilot burner 13 is ignited, and the pilot burner 12 is ignited due to the transfer of flame from the side pilot burner 13.

In addition, along with the opening of the valves 9 and 15 and the ignition operation of the spark plug 14, the ignition extinguishing operation tool 1
At the time of ignition operation of 7, the power supply circuit 2 is activated by the switch operation means in conjunction with the ignition extinguishing operation tool 17.
Since the switch 22 in the pilot burner 1 is closed and power can be supplied from the thermocouple 20 to the electromagnetic coil 9A, the pilot burner 1
With the starting force generated by the thermocouple 20 in conjunction with the ignition of the main valve 9, the main valve 9, which is opened by the valve opening means, is held open by the electromagnetic coil 9A against the closing biasing force. Combustion of the pilot burner 12 is intermittent.

Then, in the pilot burner combustion state,
When the water faucet 15 is opened by the opening/closing operation tool 16 and the water flow to the heat exchanger 1 is started, the water pressure response valve 10 is opened accordingly, and fuel supply to the main burner 7 is started, and the pilot burner 12 is opened. The main burner 7 is ignited by the flame transfer, and hot water supply is then started.

In addition, in the hot water supply state, when the faucet 15 is closed by the opening/closing operation tool 16 and the water flow to the heat exchanger 1 is stopped, the fuel supply to the main burner 7 is stopped due to the corresponding closing of the hydraulic response valve 10. The main burner 7 is then extinguished, and hot water supply is then stopped.

When the ignition/extinguishing operation device 17 is operated to extinguish the fire in the pilot burner combustion state where the main valve 9 is held open by the electromagnetic coil 9A due to the electromotive force of the thermocouple 20, the ignition/extinguishing operation device 17, the switch 22 in the power supply circuit 21 is opened by the switch link operating means, and the power supply from the thermocouple 20 to the electromagnetic coil 9A is cut off. The valve is closed by the closing biasing force, and the pilot burner 12 is extinguished by this valve closing.

Next, the specific structure and operation of the ignition/extinguishing operation configuration will be explained based on FIG. An ignition/extinguishing operation that returns from push-in position c by a set stroke d to intermediate push-in position b on the projecting side by elastic biasing force, is self-retained at intermediate push-in position b, and is further self-held at intermediate push-in position b. When the tool 17 is pushed again, it is configured as a push button, and after the pushing is released, it returns to the initial protruding position a due to the elastic biasing force.

The valve opening means is composed of a push rod 19 connected to the ignition extinguishing operation tool 17 and a valve operation cam 19A attached to the push rod 19, and the spark plug starting means is composed of a push rod 19 connected to the ignition extinguishing operation tool 17, and a valve operating cam 19A attached to the push rod 19. It is composed of a limit switch 18 and a first sliding cam 17A for operating the limit switch, which is connected to the ignition/extinguishing operation tool 17.

Further, the switch link operation means is configured such that the switch 22 in the power supply circuit 21 is a normally open limit switch, and a second sliding cam 17B for operating the limit switch 22 is connected to the ignition/extinguishing operation tool 17. It is configured as follows.

Regarding the operation, (a) As shown in Fig. 2A, when the ignition extinguishing operation device 17 is located at the protruding position a, which is the extinguishing operation completion position, the main valve 9 and the side pilot burner valve 15 are The valves are maintained in the closed state by the closing biasing springs 9B and 15A, respectively, and the spark plug starting limit switch 18 and the normally open limit switch 22 of the power supply circuit 21 are each in the open state.

(B) As shown in FIG. 2B, when the ignition/extinguishing operation tool 17 is pushed to the most pushed position c for ignition operation, the main valve 9 is pushed by the push rod 19 against the closing biasing spring 9B.
is opened, and the side pilot burner valve 15 is opened by the valve operating cam 19A attached to the push rod 19 against the closing biasing spring 15A.

When these valves are opened, the limit switch 18 for starting the spark plug is activated by the first sliding cam 17A connected to the ignition extinguishing operation tool 17, and the second sliding cam 17B connected to the ignition extinguishing operation tool 17 is activated. The normally open limit switches 22 in the power supply circuit 21 are respectively closed.

In other words, the pilot burner 12 is ignited by pushing the ignition/extinguishing tool 17 to the most pushed position c, and as the pilot burner 12 ignites, the main valve 9 is opened by the activation force of the thermocouple 20. Holding begins.

(C) As shown in FIG. 2C, when the ignition extinguishing device 17 returns to the intermediate push-in position b and is self-retained after being released, the main valve 9
is held open by the electromagnetic coil 9A receiving power from the thermocouple 20, while the side pilot burner valve 15 is
The valve is closed by the closing biasing spring 15A as the valve operating cam 17A returns.

In addition, limit switch 1 for starting the spark plug
8 has returned to the open state by the return displacement of the first sliding cam 17A, but the closing operation of the power circuit limit switch 22 by the second sliding cam 17B is maintained even in the intermediate push-in position b. Since the action range of the cam 17B is set, the power circuit limit switch 22 is maintained in the closed state.

That is, in a state where the ignition/extinguishing operation tool 17 is held at the intermediate push-in position b, combustion in the pilot burner 12 continues, and in this state, the main burner 7 is ignited and extinguished by the opening/closing operation of the hydraulically responsive valve 10. will be held.

In addition, in the self-holding state at this intermediate push-in position b, if the pilot burner 12 unexpectedly goes out or causes poor combustion, the main valve 9 automatically closes due to the accompanying decrease in the electromotive force of the thermocouple 20. .

(d) When the ignition extinguishing operation tool 17, which is self-held at the intermediate push-in position b, is pushed in again as a fire-extinguishing operation, and after the pushing is released, it returns to the protruding position a, due to the accompanying return displacement of the second sliding cam 17B. Power circuit limit switch 22
returns to the open state, and the thermocouple 20 to the electromagnetic coil 9
The power supply to A is cut off and the main valve 9 is closed.

[Second Embodiment] Next, a second embodiment will be described based on FIG. 3. It should be noted that parts and devices similar to those described in the first embodiment are designated by the same reference numerals as those used in the first embodiment, and explanations thereof will be omitted.

FIG. 3 shows an instantaneous water heater as in the first embodiment, but as a difference in the ignition/extinguishing operation configuration, in the second embodiment, an opening/closing operation tool 16 for the water faucet 5 is used.
It is also used as an ignition/extinguishing control tool.

The valve opening means for opening the main valve 9 and the side pilot burner valve 15 in conjunction with the ignition operation of the ignition/extinguishing operation tool includes:
The main valve 9 and the side pilot burner are connected to the faucet opening/closing tool 16 so that the main valve 9 and the side pilot burner valve 15 open in conjunction with the opening operation of the faucet opening/closing tool 16 as an ignition operation. The burner valve 15 is mechanically linked, and the spark plug activation means for igniting the spark plug 14 in conjunction with the ignition operation of the ignition/extinguishing operation tool is performed by opening the faucet opening/closing operation tool 16. The spark plug starting switch 18 is mechanically linked to the water governor 6 so that the spark plug starting switch 18 closes when water starts flowing.

Furthermore, the power supply circuit 21 connecting the thermocouple 20 and the electromagnetic coil 9A serving as the electromagnetic valve opening holding means in the main valve 9 is provided with a switch 22 for opening and closing the thermocouple 20. , in conjunction with the ignition extinguishing operating tool, the ignition extinguishing operating tool is in a closed state when the ignition operation is performed, and
As a link operation means for a switch that opens when the ignition/extinguishing operation tool extinguishes a fire, the power supply circuit switch 22 opens when water starts flowing by opening the faucet opening/closing operation tool 16.
A water pressure-responsive operating mechanism 23 is provided that interlocks the water cabana 6 and the power circuit switch 22 so that the water cabana 6 and the power circuit switch 22 are closed and the power circuit switch 22 is opened when the water flow is stopped due to the closing operation of the faucet opening/closing operating tool 16. .

That is, when the faucet 5 is opened by the opening operation of the faucet opening/closing operation tool 16 as an ignition/extinguishing operation tool and water starts flowing to the heat exchanger 1,
The main valve 9 and the side pilot burner valve 15 are opened in conjunction with the faucet opening/closing device 16, and the spark plug 14 is activated in conjunction with the water governor 6 and the spark plug start switch 18 to activate the side pilot. When the burner 13 is ignited, the pilot burner 12 and the main burner 7 are ignited, thereby starting hot water supply.

In addition, along with these valve openings and ignition operations, the power supply circuit switch 22 closes in conjunction with the water governor 6 as water starts flowing, making it possible to supply power from the thermocouple 20 to the electromagnetic coil 9A. ,
As the pilot burner 12 ignites, the thermocouple 2
The electromotive force generated by 0 causes the main valve 9 to close against the biasing force and is held open by the electromagnetic coil 9A, and the main burner 7 and pilot burner 12 continue to burn, and hot water continues to be supplied in this state. be done.

In addition, the side pilot burner valve 15
As in the first embodiment described above, it opens in conjunction with the opening operation of the faucet opening/closing operation tool 16 as an ignition operation, contributes to burner ignition, and then closes when the opening operation of the faucet opening/closing operation tool 16 is completed. It is designed to speak.

In the above hot water supply state, when the faucet 5 is closed by the closing operation of the faucet opening/closing operation tool 16 as an ignition/extinguishing operation tool and the water flow to the heat exchanger 1 is stopped, the connection with the water governor 6 is accordingly caused. The interlocking action opens the power circuit switch 22 and cuts off the power supply from the thermocouple 20 to the electromagnetic coil 9A, extinguishing the main burner 7 and the pilot burner 12, and then stopping hot water supply.

In the combustion state, if the pilot burner 12 unexpectedly goes out or causes poor combustion, the electromotive force of the thermocouple 20 decreases as a result, and the main valve 9 closes due to the biasing force.

Further, even when the water pressure to the heat exchanger 1 is abnormally reduced, the power circuit switch 22 is opened in conjunction with the water governor 6, and the main valve 9 is closed by the biasing force.

In the instantaneous water heater shown in this second embodiment, the water pressure responsive valve 10, which is linked to the water governor 6, is connected to the gas fuel so that it opens only when the water flow to the heat exchanger 1 is appropriate. It may be installed in the supply path 8, and in that case, in conjunction with the faucet opening/closing operating tool 16 as an ignition/extinguishing operating tool, the power circuit switch 22 is activated when the faucet opening/closing operating tool 16 is opened as an ignition operation. When the faucet opening/closing operation tool 16 is in the closed state and the faucet opening/closing operation tool 16 is closed as a fire extinguishing operation, the power supply circuit switch 22 is opened as a switch linking operation means, and when the water flow starts by opening the faucet opening/closing operation tool 16. The power circuit switch 22 is closed, and
The same function can also be obtained by adopting a configuration in which the water pressure responsive valve 10 and the power circuit switch 22 are linked so that the power circuit switch 22 opens when the water flow stops due to the closing operation of the faucet open/close operating tool 16. can.

[Other Examples]

Next, other embodiments will be described.

Various improvements can be made to the specific structure for holding the closing-biased valve 9 in the open state using the electromotive force of the thermocouple 20 as power source power, and these holding structures are collectively referred to as electromagnetic opening. It is called valve holding means 9A.

The fuel used may be liquid fuel, gas-liquid two-phase fuel, or the like in addition to gaseous fuel.

The present invention can be applied to various combustion devices such as water heaters, fan heaters, boilers, and combustion type heaters for various uses.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is an overall configuration diagram of a water heater, FIG.
2 and 3 are enlarged cross-sectional views showing the operating state. FIG. 3 is an overall configuration diagram of a water heater showing a second embodiment of the present invention. 8...Fuel supply path, 9...Valve, 14...Spark plug, 9A...Valve open holding means, 17...Ignition extinguishing operation tool, 17A, 18...Spark plug starting means, 17B...Switch linkage operation Means, 19...
Valve opening means, 20... thermocouple, 21... power supply circuit,
22...Switch.

Claims (1)

[Claims for Utility Model Registration] A thermocouple 20 that generates an electromotive force by heating by the burner 12 is provided, a closed-biased valve 9 is interposed in the fuel supply path 8 to the burner 12, and an ignition/extinguishing operation tool 17 is provided. valve opening means 19 that closes the valve 9 and opens it against the urging force in conjunction with the ignition operation of the ignition extinguishing device 17; and a spark plug activation device that operates the ignition plug 14 in conjunction with the ignition operation of the ignition extinguishing operation tool 17. The valve opening means 19 uses the means 17A, 18 and the electromotive force of the thermocouple 20 as power source.
an electromagnetic valve-open holding means 9A for holding the valve 9 opened by closing the valve in an open state against a biasing force;
A combustion apparatus comprising: a power supply circuit 21 connecting the thermocouple 20 and the valve opening holding means 9A is provided with a switch 22 for opening and closing the power supply circuit 21, which is linked to the ignition/extinguishing operation tool 17; The switch 22 is closed when the ignition extinguishing operation tool 17 is operated to ignite, and the switch 22 is closed when the ignition extinguishing operation tool 17 is operated to extinguish the fire.
A combustion device provided with a switch link operation means 17B for opening.