JPH0712743U - Stop-type water heater - Google Patents

Abstract

(57) [Abstract] [Purpose] The ignition operation device of the pre-stop water heater is a one-push type piezoelectric ignition system with high safety and excellent operability. [Structure] In a pre-stop type water heater, a lock lever 3 interlocking with a water pressure responsive device D, and a one-push piezoelectric ignition type ignition operating device using a heart cam 2 are interlocked with an instrument plug V ₁ and a safety valve V. _2, in conjunction with the operating lever 9 for opening and closing the ignition pilot valve V _3, when passing water through the water to the heat exchanger 1 is ahead is to prevent movement of the actuating lever 9 by the lock lever 3 Ignition operation is prohibited.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stopper type water heater equipped with a push button type piezoelectric ignition type ignition operating device.

[0002]

[Prior art]

 As shown in FIG. 3, for example, as shown in FIG. 3, a pilot-fired water heater equipped with a conventional push-button type piezoelectric ignition type ignition operating device has a pilot ignition button 6 ', a main valve opening button 7 ′ And a fire extinguisher button 8 ′ have three push buttons, and when the pilot ignition button 6 ′ is pressed, the ignition pilot P₁′ 、 Pilot P for quick₃'Ignition pilot valve V _Five ′ And pilot burner P₂'Ignition valve V₃′ Opens and the magnet valve V₂At the same time when the ‘′ is pushed open, the piezoelectric device is actuated by the piezoelectric operation part 28 ′, and the spark is blown from the electrode 25 ′ by the piezoelectric element, and the ignition pilot P₁′ → Pilot burner P₂'And quick pilot P₃Ignite in the order of ′ and the magnet valve V₂′ Is held adsorbed and opened by thermocouples 24 ′ and 24 ″.

When the main valve opening button 7 ′ is pressed after the pilot burner ignition, the main valve V ₁ ′ is opened and the gas passage to the hydraulic automatic gas valve V ₄ ′ is opened, and the main burner 10 ′ is ready for ignition. To be done.

When the hot water supply plug (not shown) is opened after the preparation for ignition, a differential pressure is generated in the diaphragm chamber of the water pressure responsive device D ′ by the venturi 19 ′, the amount of water is increased, and the water supply pressure is reduced to the spring 14 ′. When the spring load of No. 1 is overcome, the automatic hydraulic gas valve V ₄ ′ at the tip of the thrust rod 5 ′ is opened via the diaphragm 4 ′, and the main burner 10 ′ is ignited by the pilot flame to heat the heat exchanger 1 ′. Take a bath.

[0005] When stopping the tapping is to close the water tap, the primary and secondary sides of the diaphragm chamber is isobaric, closed 'hydraulic automatic gas valve V _4' by a spring 14, extinguishing the main burner 10 ' Stop the hot water.

[0006] water heater after use, 'Press, ignition valve V _3' Fire button 8, 'pilot burner P ₂ is closed' main valve V ₁ was structured for extinguishing.

In the above-described conventional stop water heater, it is necessary to separately push two push buttons, a pilot ignition button 6'and a main valve opening button 7 ', during ignition. Since this is a piezoelectric ignition system, there is a danger of release of raw gas and explosion ignition 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. For safety, it is necessary to perform ignition operation in a state where water is not being passed to the heat exchanger 1 '. Therefore, when the ignition operation is performed while passing water, even if ignition fails, the gas passages (all gas passages) to the main burner are opened so that raw gas is not released. When extinguishing the fire, it is necessary to press the fire extinguishing button 8 '.

[0008]

[Problems to be solved by the device]

 Since the above-mentioned conventional technique requires three push buttons, there is a problem that not only the structure becomes complicated and the cost becomes high, but also the operation is troublesome and the operability is poor.

An object of the present invention is to solve the above problems, to enable a one-push type piezoelectric ignition system having excellent operability and high safety, and to provide a pre-stop type water heater without such a problem. There is.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the stopper type water heater of the present invention is a stopper type water heater equipped with a push-button type piezoelectric ignition type ignition operating device, and when water is passed to the heat exchanger 1. Is a one-push type that uses the water flow lock mechanism A that restricts the ignition operation and the heart cam 2 and pushes the heart cam 2 from the starting end extinguishing position a to the ending ignition position b to move the instrument plug V.₁, Safety valve V₂, Ignition pilot valve V₃When the piezoelectric device is actuated at the same time the valve is opened, the ignition pilot valve V is moved by the backward operation from the terminal ignition position b to the intermediate combustion position c. ₃ Is closed, and the instrument stopper V₁Is kept open and the safety valve V₂Is held open so that it can be closed, and an ignition control device B is configured to close all of the gas valves by retracting from the intermediate combustion position c to the starting end extinction position a. The feature is that it is provided.

[0011]

[Action]

 The pre-stop type water heater of the present invention having the above-mentioned configuration associates the lock mechanism A, which cannot perform the ignition operation when water is passed through the heat exchanger, with the one-push type ignition control mechanism B using the heart cam 2. Since the lock mechanism A blocks the movement of the ignition control mechanism B during the water flow leading to the heat exchanger, the release of the raw gas due to an erroneous operation, etc. There is no danger of explosion and ignition.

Further, since the one-push type piezoelectric ignition system is enabled, the piezoelectric ignition can be performed by the push-on operation of a single push button, and the extinguishing can be surely performed by the push-off operation.

[0013]

【Example】

 An embodiment of the pre-stop type water heater of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, A is a water flow lock that restricts ignition operation when water is flowing to the heat exchanger 1 (when water is flowing to the heat exchanger 1 ahead). With the mechanism, the lock lever 3 is associated with the projecting rod 5 that interlocks with the diaphragm 4 of the hydraulic pressure responding device D, and the lock lever 3 is regulated so that the operation button 6 cannot be pushed when water is passed. There is.

The lock lever 3 is rotatably and pivotally supported by a support shaft 7, and the tip interlocking portion 3 a thereof is associated with a locking projection 8 provided on the projecting rod 5, so that the lock lever 3 is mounted on the projecting rod 5. It rotates to the left and right in the figure in conjunction with the advancing / retreating operation of the operation lever, and the operation of the operation lever 9 interlocking with the operation button 6 is blocked by the base end lock portion 3b, so that the operation button 6 cannot be pressed during water passage. Further, when water is not being supplied to the heat exchanger 1, the lock lever 3 releases the rotation blocking of the operating lever 9 so that the operating button 6 can be pushed.

The water-passage lock mechanism A is not limited to the lock mechanism of the embodiment in which the lock lever 3 that interlocks with the protruding rod 5 is associated with the operation lever 9, and the water-passage lock mechanism A can be used when water is passed through the heat exchanger 1. It is also free to use any other locking mechanism that restricts the ignition operation.

Reference numeral B denotes a one-push type piezoelectric ignition type ignition control device using the heart cam 2, which is controlled by a cam groove 2 a of the heart cam 2 and a lever pin (not shown), and an operation button 6 integrated with the heart cam 2. With the push-on operation, the piezoelectric device ignites and the push-off operation extinguishes the fire.

That is, as shown in FIG. 2, at the time of ignition, by pushing and advancing the heart cam 2 from the starting end extinguishing position (starting end) a to the ending ignition position (ending end) b, the instrument plug V installed in the gas passage _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.

[0019] The ignition pilot valve V ₃ is closed and the ignition pilot P ₁ is extinguished by an automatic retreat operation from the terminal ignition position b to the intermediate combustion position (intermediate) c by releasing the push forward operation. The combustion of the pilot burner P ₂ is continued by keeping the plug V ₁ open, and the safety valve V ₂ is held attracted and opened by the magnet M so that the safety valve V ₂ can be closed, and the ignition preparation operation for the main burner 10 is completed. .

Next, when extinguishing the fire, the heart cam 2 is moved backward from the intermediate combustion position c to the starting end extinguishing position a to close all of the gas valves to extinguish the pilot burner P _2. There is.

The operating lever 9 which is interlocked with the operation button 6 is rotatably supported by a support shaft 11, and opens and closes the instrument plug V ₁ and the ignition pilot V ₃ on the proximal end side of the distal end operating portion 9a thereof. The valve shaft 12 that opens the safety valve V ₂ is associated, the proximal end lock portion 3b of the lock lever 3 of the water lock mechanism A is associated with the distal end side, and the proximal end push portion 9b is associated with the proximal end push portion 9b. The operation lever 13 provided with the operation button 6 and the integral heart cam 2 is associated, and the operation lever 9 is rotated to the left and right in the figure (at a certain angle) in conjunction with the forward / backward movement of the operation button 6, so that the instrument plug is closed. V ₁ , the safety valve V ₂ , and the ignition pilot valve V ₃ are opened and closed.

V ₄ is a hydraulic automatic gas valve provided at the tip of the protruding rod 5, which is provided in the gas passage on the downstream side of the instrument stopper V _{1 by} a spring 14 biasing the gas passage in the closing direction. It is designed to open and close in conjunction with the Daiyafurumu 4 of. V ₅ is a hot water tap, which is provided at the tip of the tap pipe 15.

The ignition pilot P ₁ has an ignition pilot gas pipe 16 communicating with the gas passage only when the ignition pilot valve V ₃ provided between the instrument plug V ₁ and the hydraulic automatic gas valve V ₄ is opened. The pilot burner P ₂ is connected to a pilot burner gas pipe 17 branched from a gas passage between the instrument plug V ₁ and the hydraulic automatic gas valve V ₄ .

Incidentally, in FIG. 1, 18 is a device stopper V₁And ignition pilot valve V₃Spring for urging V in the closing direction, V₆Is the water governor installed in the water supply channel, and V₇Is a hot water temperature control valve, 19 is a venturi, 20 is a strainer, and 21 is a water inlet. Furthermore, 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 structure will be described.

When water is passed through the heat exchanger 1 at the time of ignition, the water pressure is detected by the diaphragm 4 of the water pressure responsive device D and the thrust rod 5 is moved to the left in the drawing to Although the hydraulic automatic gas valve V ₄ integrated with the rod 5 is opened, the lock lever 3 which is interlocked with the rod 5 via the locking projection 8 by turning the protruding rod 5 to the left in the drawing rotates counterclockwise in the drawing. It is dynamically displaced (see the dotted line in FIG. 1), and the base end lock portion 3b is positioned within the rotation locus of the tip end operation portion 9a of the operating lever 9, that is, the base end lock portion 3b is located in front of the tip end operation portion 9a. The distal end operating portion 9a of the operating lever 9 is locked to the base end lock portion 3b of the lock lever 3 to prevent the operating lever 9 from rotating counterclockwise in the drawing, and the operation button 6 is ignited. The operation is restricted.

Further, when water is not being supplied to the heat exchanger 1, the diaphragm 4 of the hydraulic pressure responding device D senses this, and the protruding rod 5 is the spring 14 and the stop position on the right side of the drawing (see the solid line in FIG. 1). (See position), the automatic hydraulic gas valve V ₄ is closed, and the lock lever 3 is rotationally displaced in the clockwise direction in the figure through the locking projection 8 (see the solid line in FIG. 1), and its proximal end locking portion is shown. 3b is located outside the rotation locus of the distal end operating portion 9a of the operating lever 9, that is, the base end locking portion 3b is escaped above the distal end operating portion 9a, and the operating lever 9 is moved counterclockwise in the drawing. Rotation is free, and ignition operation by the operation button 6 is possible.

Therefore, when using the water heater, when the operation button 6 is pushed to push the heart cam 2 forward from the starting end extinguishing position a to the ending ignition position b, the operating lever 13 is used to show the actuating lever 9. It rotates counterclockwise by a certain angle and moves the valve shaft 12 leftward in the drawing against the spring 18 at the tip operating portion 9a of the operating lever 9 to open the instrument plug V ₁ and the ignition pilot valve V ₃ . At the same time, the safety valve V ₂ is also pushed open to push the attraction plate 27 against the magnet M, and at the same time, the piezoelectric device (not shown) is activated.

[0029] Therefore, firstly, to ignite the ignition pilot P ₁ spa over click 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 By heating the thermocouple 24 with the fire f, the safety valve V ₂ is held open by the magnet M by suction.

After that, when the pressing force of the operation button 6 is released, the heart cam 2 is retracted and locked together with the operation button 6 from the terminal ignition position b to the intermediate combustion position c. The backward movement in the valve shaft 12 also the ignition pilot P ₁ and closes the retracted ignited pilot valve V ₃ to the right in the figure extinguishing Suruga, plug fitting V ₁ was kept opened, and the safety valve V ₂ Is kept open by the magnet M, the gas passage to the automatic hydraulic gas valve V ₄ is opened, and the preparation for ignition of the main burner 10 is completed.

When the hot water tap V ₅ is opened to prepare hot water after the ignition preparation by one action of pressing and releasing the operation button 6 is completed, the venturi 19 causes a differential pressure in the diaphragm chamber of the hydraulic pressure responding device D, resulting in a water amount. When the supply pressure exceeds the spring load of the spring 14, the hydraulic automatic gas valve V ₄ integrated with the protruding rod 5 via the diaphragm ₄ is opened to supply gas to the main burner 10. The main burner 10 is ignited by the normal fire f of the pilot burner P ₂ , and the heat exchanger 1 is heated and tapped.

When hot water supply is stopped and the hot water tap V ₅ is closed, the primary side and the secondary side of the diaphragm chamber become equal in pressure, and the hydraulic automatic gas valve V ₄ is closed by the spring 14 to the main burner 10. The main burner 10 is extinguished and the tapping is stopped to stop the supply of the gas.

After using the water heater, pressing the operation button 6 at the ignition preparation position again releases the lock, and when the pressing force is released, the heart cam 2 moves the operation button from the intermediate combustion position c to the starting end extinguishing position a. Retreat with 6. Therefore, since the valve shaft 12 pushed to the left in the figure via the actuating lever 9 moves to the right in the figure by the spring 18, the actuating lever 9 is pushed by the valve shaft 12 to rotate clockwise in the figure. Since it returns to the original position and the instrument plug V ₁ is closed, the supply of gas to the pilot burner P ₂ is cut off, the pilot burner P ₂ is extinguished, and at the same time the adsorption holding by the magnet M is released. Therefore, the safety valve V ₂ is also closed and the operation is stopped. Even when the fire is extinguished, it can be performed by one action of pressing and releasing the operation button 6.

[0034]

[Effects of the Invention] According to the pre-stop type water heater of the present invention, since it is a one-push type piezoelectric ignition system having a lock mechanism that prevents ignition operation when water is passed through the heat exchanger, safety is improved. It is possible to provide a pre-stop water heater with high cost and excellent operability.

Therefore, the one-push type piezoelectric ignition system is possible in the front-end type water heater, and the dry battery, which is a consumable item, is not used, which is a highly practical idea.

[Brief description of drawings]

FIG. 1 is a developed sectional view showing an embodiment of a stopper type water heater 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 water flow lock mechanism 2 heart cam V ₁ instrument plug V ₂ safety valve V ₃ ignition pilot valve a start fire extinguishing position b end ignition position c intermediate combustion position

Claims (1)

[Scope of utility model registration request] 1. A water stopper lock mechanism for restricting ignition operation when water is supplied to a heat exchanger (1) in a pre-stop type water heater equipped with a push button type piezoelectric ignition type ignition operating device ( A)
And a push-forward operation of the heart cam (2) from the starting end extinguishing position (a) of the heart cam (2) to the end ignition position (b) by means of the one-push type, the instrument plug (V ₁ ) and the safety valve (V
₂ ) Open the ignition pilot (V ₃ ) and at the same time operate the piezoelectric device to close the ignition pilot valve (V ₃ ) by the backward operation from the terminal ignition position (b) to the intermediate combustion position (c). In addition, the instrument plug (V ₁ ) is kept open and the safety valve (V ₂ ) is kept open so that it can be closed, and the backward operation from the intermediate combustion position (c) to the starting end extinguishing position (a) is performed. 2. A pre-stop type water heater comprising an ignition operating device including an ignition control mechanism (B) configured to close all of the gas valves.