JP2571094Y2 - Pre-stop water heater - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater having a push button type and a ignition device of a piezoelectric ignition type.

[0002]

2. Description of the Related Art As shown in FIG. 3, for example, a conventional push-button type water heater provided with a push-button type piezoelectric ignition type ignition operating device has a pilot ignition button 6 'and a main valve open. It has three push buttons, a valve button 7 'and a fire extinguishing button 8'. When the pilot ignition button 6 'is pressed, the ignition pilot P ₁ ',
Ignition pilot valve V for quick pilot P ₃ '
The ignition valve V ₃ ′ of the pilot burner ₅ ′ and the pilot burner P ₂ ′ is opened, and the magnet valve V ₂ ′ is also pushed and opened. At the same time, the piezoelectric device is operated by the piezoelectric operating section 28 ′, and the spark is emitted from the electrode 25 ′ by the piezoelectric element. Ignition pilot P ₁ ′ →
The pilot burner P ₂ ′ and the quick pilot P ₃ ′ are ignited in this order, and the magnet valve V ₂ ′ is attracted and held open by thermocouples 24 ′ and 24 ″.

[0003] After the pilot burner ignition, 'When you press, the main valve V _1' main valve opening for the button 7 'to open the gas passage of up to, Menbana 10' hydraulic automatic gas valve V ₄ to open the ignition ready to Is done.

[0004] After the completion of the ignition preparation, a hot water tap (not shown)
Is opened, a differential pressure is generated in the diaphragm chamber of the hydraulic pressure responding device D 'from the venturi 19'. The hydraulic automatic gas valve V ₄ ′ at the tip of is opened, and the main burner 1
At 0 ', the heat exchanger 1' is heated and hot water is discharged.

When the hot water is stopped, when the hot water tap is closed, the primary side and the secondary side of the diaphragm chamber become equal pressure, and the automatic hydraulic gas valve V ₄ ′ is closed by the spring 14 ′.
The main burner 10 'is extinguished to stop tapping.

When the fire extinguishing button 8 'is pressed after using the water heater, the ignition valve V ₃ ' and the main valve V ₁ 'are closed, and the pilot burner P ₂ ' extinguishes the fire.

In the prior art water heater, it is necessary to separately push two push buttons, a pilot ignition button 6 'and a main valve opening button 7', at the time of ignition. this is,
If the hydraulic automatic gas valve V ₄ ′ is opened prior to the passage of water to the heat exchanger 1 ′ at the time of ignition due to the piezoelectric ignition system, there is a danger of release of raw gas and explosion ignition. It is necessary to perform an ignition operation in a state where water is not passed through the exchanger 1 '. Therefore, when the ignition operation is performed while passing water, even if the ignition fails, the gas passages (all gas passages) to the main burner are opened so that the raw gas is not released. When extinguishing the fire, it is necessary to press the fire extinguishing button 8 '.

[0008]

SUMMARY OF THE INVENTION In the above prior art,
Since three push buttons are required, not only is the structure complicated and the cost is increased, but also the operation is troublesome and the operability is poor.

The present invention has been made to solve the above-mentioned problems, and to provide a one-push type piezoelectric ignition system which is excellent in operability and high in safety, and aims to provide a water heater having no such problems. I have.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a first-start water heater having a push-button type piezoelectric ignition-type ignition operating device. A water-lock mechanism A for restricting ignition operation when water flows to the exchanger 1, and a push-forward operation of the heart cam 2 from the start extinguishing position a to the end ignition position b by the one-push system using the heart cam 2. To open the appliance plug V ₁ , the safety valve V ₂ , and the ignition pilot valve V ₃ , and simultaneously operate the piezoelectric device, and close the ignition pilot valve V ₃ by retreating from the terminal ignition position b to the intermediate combustion position c. and, the safety valve V ₂ with keeping the plug fitting V ₁ in the open state allowed the open-valve state hold in a closed ready, closed all of the gas valve in retreat operation from the intermediate combustion positions c to start fire extinguishing position a An ignition control system comprising an ignition control mechanism B having a valve configuration. It is characterized in that a device.

[0011]

The tip-on type water heater of the present invention having the above configuration has the following features.
Since the lock mechanism A, which cannot perform the ignition operation when water is passed through the heat exchanger, and the one-push type ignition control mechanism B using the heart cam 2 are provided in association with each other, the water flow to the heat exchanger takes precedence. At the time of water flow, since the movement of the ignition control mechanism B is blocked by the lock mechanism A and the ignition operation cannot be performed, there is no danger of emission of raw gas, explosion ignition or the like due to erroneous operation or the like.

Further, since the piezoelectric ignition system is made possible by the one-push system, the piezoelectric ignition can be performed by the push-on operation of a single push button, and the fire can be surely extinguished by the push-off operation.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of the present invention;

In FIG. 1 and FIG. 2, A denotes the time when water is passed through the heat exchanger 1 (when water is passed through the heat exchanger 1).
Is a water flow lock mechanism for restricting ignition operation. The lock lever 3 is associated with a projecting rod 5 interlocked with the diaphragm 4 of the hydraulic pressure responsive device D. When water is passed through the lock lever 3, the operation button 6 is pressed. It has a structure to restrict movement operation.

The lock lever 3 is rotatably supported by a support shaft 7, and its tip interlocking portion 3 a is associated with a locking projection 8 provided on the projection bar 5. It rotates right and left in the figure in conjunction with the forward / backward movement, and prevents movement of the operating lever 9 that is linked with the operation button 6 by the base end lock portion 3b. When the water is not passed through the heat exchanger 1, the lock lever 3 stops the rotation of the operation lever 9 and the operation button 6 can be pushed.

The water-locking mechanism A includes a protruding rod 5.
The lock mechanism is not limited to the lock mechanism of the embodiment in which the lock lever 3 interlocked with the operation lever 9 is used, and any other lock mechanism that restricts the ignition operation when water flows through the heat exchanger 1 may be used. is there.

B is a one-push type piezoelectric ignition type ignition control device using the heart cam 2, which is controlled by a cam groove 2a of the heart cam 2 and a lever pin (not shown) to control an operation button 6 integrated with the heart cam 2. The structure is such that ignition can be performed by the piezoelectric device when the push-on operation is performed, and the fire can be extinguished by the push-off operation.

That is, as shown in FIG. 2, at the time of ignition, the heart valve 2 is pushed forward from the starting extinguishing position (starting end) a to the end ignition position (ending end) b, and the appliance plug V provided in the gas passage is operated. _1, the safety valve V _2, by operating the piezoelectric device at the same time to open the ignition pilot V ₃ (piezoelectric device) to ignite the ignition pilot P _1.

The automatic retreat operation from the terminal ignition position b to the intermediate combustion position (intermediate) c by releasing the pushing forward operation,
The ignition pilot valve V ₃ is closed to extinguish the ignition pilot P _1, but the device plug V ₁ is kept open to continue the combustion of the pilot burner P ₂ and the safety valve V ₂ can be closed. Then, the valve is held open by the magnet M, and the operation of preparing for ignition of the main burner 10 is completed.

Next, when extinguishing the retreat operation from the intermediate combustion position c of the heart cam 2 to start fire extinguishing position a, closed all the gas valve has a structure to extinguish the pilot burner P _2.

The operating lever 9 interlocked with the operation button 6 is
It is pivotally supported by a support shaft 11 and its tip operating portion 9
opening and closing the plug fitting V ₁ and the ignition pilot V ₃ on the base end side of a, with associating the valve shaft 12 pushes open the safety valve V _2, the locking lever 3 of the water flow locking mechanism A on the distal side
And the base pushing portion 9b
The operating rod 13 having the heart cam 2 integrated with the operating button 6
The operation lever 9 pivots left and right (only a fixed angle) in the figure in conjunction with the forward / backward movement of the operation button 6 to open and close the appliance plug V ₁ , the safety valve V ₂ , and the ignition pilot valve V ₃ . Things.

V ₄ is a hydraulic automatic gas valve provided at the tip of the protruding rod 5, which is installed in the gas passage downstream of the device plug V ₁ by urging in the closing direction by a spring 14. It opens and closes in conjunction with the diaphragm 4.
Also, V ₅ in the hot-water tap, is provided at the tip of the tapping pipe 15.

The ignition pilot P ₁ has an appliance plug V _1.
Hydraulic automatic gas valve V ₄ ignition pilot gas pipe 16 communicating with the gas passage only when the valve is opened the ignition pilot valve V ₃ equipped between are connected with, also, the pilot burner P
The _2, pilot burner gas pipe 17 branched from the gas passage between the plug fitting V ₁ and hydraulic automatic gas valve V ₄ is connected.

[0024] In FIG. 1, spring 18 urges the plug fitting V ₁ and the ignition pilot valve V ₃ to the closed direction, V ₆ water governor equipped on the water supply passage also,, V ₇ is hot water temperature control valve , 19 is a venturi, 20 is a strainer, 2
1 is a water inlet. V ₈ is a capacity switching valve, 22 is a gas inlet, 23 is a main nozzle, 24 is a thermocouple, 25 is an electrode, 26 is a water supply pipe, and 27 is an adsorption plate.

Next, the operation of the above configuration will be described.

At the time of water flow when water flow to the heat exchanger 1 precedes at the time of ignition, the diaphragm 4 of the water pressure responsive device D senses the supplied water pressure, and moves the protruding rod 5 to the left in the drawing, thereby opening the rod 5 and hydraulic automatic gas valve V ₄ integral, but the lock lever 3 times to the counterclockwise direction in conjunction with this through engagement projections 8 by the movement of the left in the figure of the ram 5 It is dynamically displaced (see the dotted line in FIG. 1), and the base lock portion 3b is positioned within the rotation trajectory of the distal end operating portion 9a of the operating lever 9, that is, the proximal end lock portion 3b is positioned before the distal end operating portion 9a. The operation lever 9 is prevented from turning in the counterclockwise direction in the figure by projecting and locking the distal end operation portion 9a of the operation lever 9 to the base end lock portion 3b of the lock lever 3, and the ignition operation of the operation button 6 To be disabled.

When water is not passed through the heat exchanger 1, the diaphragm 4 of the hydraulic pressure responsive device D senses this, and the protruding rod 5 is stopped by the spring 14 at the right stop position (shown by the solid line in FIG. 1). in the location reference) hydrodynamic automatic gas valve V ₄ is closed, the lock lever 3 is rotated and displaced to the clockwise direction via the locking projections 8 (see a solid line in FIG. 1), a base end locking portion 3b is positioned outside the rotation trajectory of the distal end operating portion 9a of the operating lever 9, ie, the proximal locking portion 3b is moved to
, And the operating lever 9 can be freely rotated in the counterclockwise direction in the figure, so that the ignition operation by the operation button 6 can be performed.

Therefore, when using the water heater, the operation buttons 6
To push the heart cam 2 to its starting fire extinguishing position a.
When the push rod is pushed forward to the end ignition position b, the operating rod 13
In the operating lever 9 to the counterclockwise direction only rotated a certain angle, the valve shaft 12 to the left in the figure at the tip operating portion 9a of the actuating lever 9 moves against the spring 18 and the plug fitting V ₁ ignition pilot At the same time as opening the valve V ₃ , the safety valve V ₂ is also pushed open to push the suction plate 27 against the magnet M,
At the same time, a piezoelectric device (not shown) is activated.

[0029] Therefore, firstly, to ignite the ignition pilot P ₁ in the spark from the electrode 25 by the piezoelectric element, then to form a normal fire f ignited from the ignition pilot P ₁ to the pilot burner P _2, the normally fire f in a safety valve V ₂ holds suction valve opening by the magnet M by heating the thermocouple 24.

Thereafter, when the pressing force of the operation button 6 is released, the heart cam 2 is retracted from the terminal ignition position b to the intermediate combustion position c together with the operation button 6 and locked. The valve shaft 12 backward operation also extinguishes the ignition pilot P ₁ retracted to closed ignition pilot valve V ₃ to the right in the figure, but the plug fitting V ₁ was kept opened, and the safety valve V ₂ the opened held in a closed ready by the magnet M, to open the gas passage to the hydraulic automatic gas valve V _4, and ends the ignition ready to Menbana 10.

After the completion of the ignition preparation by one action only by pressing and releasing the operation button 6, the hot water tap V
_{When the} valve ₅ is opened, the venturi 19 starts
When the water pressure increases in the diaphragm chamber and the water supply pressure overcomes the spring load of the spring 14, the hydraulic automatic gas valve V integrated with the protruding rod 5 through the diaphragm 4
₄ is opened, for supplying gas to Menbana 10, ignited by an atmospheric fire f of the pilot burner P ₂ to the Menbana 10 by heating the heat exchanger 1 for tapping.

[0032] When stopping the tapping, when closing the hot-water tap V _5, the primary side and the secondary side of the diaphragm chamber is isobaric, to Menbana 10 Hydraulic automatic gas valve V ₄ is being closed by the spring 14 To stop gas supply,
The main burner 10 is extinguished and the hot water is stopped.

After the water heater is used, when the operation button 6 in the ignition preparation position is pressed again, the lock is released, and when the pressing force is released, the heart cam 2 is moved from the intermediate combustion position c to the starting fire extinguishing position a. Retreats with 6. Therefore, the valve shaft 12 which has been pushed leftward in the figure via the operating lever 9 is moved rightward in the figure by the spring 18, so that the operating lever 9 is pushed by the valve shaft 12 and rotates clockwise in the figure. returns to the original position, in order to plug fitting V ₁ was being closed, the supply of gas to the pilot burner P ₂ is cut off, said pilot burner P ₂
But to extinguish, at the same time for attracting and holding by the magnet M is released, the safety valve V ₂ is also restored to the closed and inactive. Even during this fire extinguishing operation, the operation can be performed in a single action by simply pressing and releasing the operation button 6.

[0034]

According to the present invention, the one-push type piezoelectric ignition system having a lock mechanism that cannot perform an ignition operation when water is passed through the heat exchanger has high safety. An inexpensive water heater with excellent operability can be provided.

Therefore, the present invention has a high practical value because a one-push type piezoelectric ignition system is made possible in a water heater with no stop and a consumable dry battery is not used.

[Brief description of the drawings]

FIG. 1 is an exploded cross-sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a control relationship between opening and closing of each gas valve by a heart cam and operation of a piezoelectric machine.

FIG. 3 is a developed sectional view of a conventional example.

[Explanation of symbols]

1 heat exchanger A Rohm locking mechanism 2 heart cam V ₁ plug fitting V ₂ the safety valve V ₃ ignition pilot valve a start fire extinguishing position b terminating ignition position c intermediate combustion position

Claims (1)

(57) [Scope of request for utility model registration] In a water heater having a push button type and a spark ignition type ignition operation device, a water flow lock mechanism for restricting ignition operation when water flows to a heat exchanger (1). A)
And a one-push system using the heart cam (2) to push and advance the heart cam (2) from the start extinguishing position (a) to the end ignition position (b), thereby causing the appliance plug (V ₁ ) and the safety valve (V
₂ ) Opening the ignition pilot (V ₃ ) and simultaneously operating the piezoelectric device, and closing the ignition pilot valve (V ₃ ) by retreating from the terminal ignition position (b) to the intermediate combustion position (c). The safety valve (V ₂ ) is kept open so that the device plug (V ₁ ) can be closed, and the safety valve (V ₂ ) is retracted from the intermediate combustion position (c) to the starting end fire extinguishing position (a). And a ignition control mechanism (B) configured to close all of the gas valves.