JPH0972608A - Operating device for gas water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability, to facilitate assembling and fitting and thereby to reduce the cost of manufacture by enabling execution of hot water supply and a temperature control by means of a single operating knob in a gas water heater. SOLUTION: A rotating member 19 is provided on the same axis as a water quantity regulating valve of a water heater and also a forward-backward motion member 20 which can move forward and backward in the direction of the axis of the rotating member 19 is provided. An operating knob 16 is so engaged with the rotating member 19 as to be movable relatively in the axial direction, by whirl-stop of the operating knob 16 by the rotating member 19, while the forward-backward motion member 20 is so designed that it can be moved forward in the axial direction through the intermediary of a slider 21 inserted into the rotating member 19, by a pushing operation of the operating knob 16. The forward-backward motion member 20 is brought into engagement at a forward motion position by a push-push mechanism 23 provided between the slider 21 and the rotating member 19. At the forward motion position, a water shutoff valve is opened through the intermediary of a lever 22 and thereby water is made to flow through a heat exchanger. The rotating member 19 is connected directly, at its shaft part 19h, with a valve element of the water quantity regulating valve and the temperature of hot supply water can be controlled by operating the water quantity regulating valve through the intermediary of the rotating member 19 by a rotating operation of the operating knob 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas water heater operating device having a heat exchanger using a gas burner as a heat source.
More specifically, a water system valve unit that controls water flow to the heat exchanger is provided with at least two valves, a water shutoff valve and a water amount adjusting valve, and a gas system valve unit that controls gas supply to the gas burner. Further, the present invention relates to an operating device applied to a gas water heater, which is provided with at least two valves, a water pressure responsive valve that opens when water is passed through a heat exchanger by opening a water shutoff valve, and a gas amount adjusting valve. .

[0002]

2. Description of the Related Art Conventionally, in this type of gas water heater, a push button type operation knob for opening and closing a water shutoff valve and a rotary operation knob for operating each adjusting valve are provided. The water shutoff valve is opened by pushing operation, which allows water to flow through the heat exchanger, and also supplies gas to the gas burner via the water pressure responsive valve to discharge hot water. The hot water temperature is adjusted by operating the rotary operation knob.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
Since the number of operation knobs is large, the operability is poor, and in addition, the assembly is troublesome and the manufacturing cost is high. By the way, the hot water outlet temperature can be adjusted by only one of the water amount adjusting valve and the gas amount adjusting valve. In view of the above points, the present invention provides an operating device that shares the operation knobs for the water shutoff valve and one of the adjusting valves, and that can perform hot water discharge and temperature adjustment with a single operation knob. Is an issue.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention includes a heat exchanger having a gas burner as a heat source, and at least two valves, a water shutoff valve and a water amount adjusting valve, are provided in a water system valve unit for controlling water flow to the heat exchanger, and the gas burner is also provided. A gas system valve unit that controls the gas supply of at least two valves, a water pressure responsive valve that opens when water is passed to the heat exchanger by opening a water shutoff valve, and a gas amount adjustment valve. In an operating device applied to a water heater, it is directly connected to a valve body of one of the water amount adjusting valve and the gas amount adjusting valve, which is rotatably arranged coaxially with one of the adjusting valves. A rotating member, a reciprocating member that is arranged so as to reciprocate in the axial direction of the rotating member and that opens and closes a water shutoff valve via an interlocking mechanism, and a rotation member that prevents rotation of the rotating member and allows relative movement in the axial direction. With the operating knob engaged, the reciprocating member to the operating knob, The operation knob is connected so as to be moved forward in the axial direction by the pushing operation, and the reciprocating member is locked at the forward movement position after the first pushing operation of the operating knob, and reciprocated after the second pushing operation of the operating knob. A push-push mechanism for returning the moving member to the returning position is provided so that the water shutoff valve is opened at the forward moving position of the reciprocating member and the water shutoff valve is closed at the returning position of the reciprocating member. It is characterized by

According to the first pushing operation of the operation knob, the reciprocating member moves forward in the axial direction, and in conjunction with this, the water stop valve is opened, water is passed through the heat exchanger, and water pressure response is caused. Gas is supplied to the gas burner through a valve to discharge hot water. Even if the pressing of the operation knob is released after the first pressing operation, the reciprocating member is locked at the forward movement position by the push-push mechanism, so the reciprocating member is returned by the second pressing operation of the operating knob. Hot water is continuously discharged until it is returned to the moving position.

Further, according to the turning operation of the operation knob, the valve body of one of the adjusting valves is turned through the turning member. When the adjusting valve is a water amount adjusting valve, the amount of water flow is increased or decreased, and the gas is adjusted. In the case of a quantity control valve, the outlet heated water temperature is adjusted by increasing or decreasing the fuel quantity of the gas burner. Here, since the rotating member is directly connected to the valve body of the adjusting valve without interposing any interlocking parts such as gears, the durability and reliability are improved, and the assembly is facilitated, and the number of operation knobs is reduced. Together, they can significantly reduce manufacturing costs.

By the way, since the reciprocating member moves in the axial direction relative to a member fixed to the water heater body, for example, a mounting bracket for the operating device, the push-push mechanism is used for the mounting bracket and the reciprocating member. It may be placed in between,
In this case, the push-push mechanism has to be assembled in the final assembly step of mounting the operating device on the mounting bracket, which deteriorates the assemblability.

On the other hand, the slider, which is moved forward in the axial direction by the pushing operation of the operation knob, is prevented from rotating around the rotating member and slidably engaged in the axial direction, so that the slider and the reciprocating member are connected. Is axially connected to allow relative rotation of the slider, and the push-push mechanism is provided between the rotating member and the slider, the push-push mechanism can be assembled at the sub-assembly stage. Assemblability is improved. In this case, the reciprocating member is moved forward in the axial direction via the slider by the pushing operation of the operation knob, and the reciprocating member is locked in the forward moving position via the slider by the push-push mechanism. Further, since the slider is prevented from rotating with respect to the rotating member, even if the rotating member is rotated by the operation knob, the function of the push-push mechanism is not adversely affected.

Although the rotating member may be directly connected to the valve body of the gas amount adjusting valve, the gas amount adjusting valve is incorporated in the gas system valve unit, while the water shutoff valve is incorporated in the water system valve unit. Therefore, it is difficult to secure the relative positional accuracy between the gas amount adjusting valve and the water shutoff valve, and it is also difficult to secure the relative positional accuracy between the reciprocating member and the water shutoff valve arranged in parallel with the rotating member. Therefore, it is necessary to configure the interlocking mechanism between the reciprocating member and the water shutoff valve so as to allow the relative position of the two to be displaced, which complicates the structure. On the other hand, since the water amount adjusting valve is incorporated in the water system valve unit like the water shutoff valve, the relative positional accuracy between the water amount adjusting valve and the water shutoff valve is secured. Therefore,
When the rotating member is directly connected to the valve body of the water amount adjusting valve, the relative positional accuracy between the reciprocating member and the water shutoff valve is ensured, and a single interlocking mechanism between the reciprocating member and the water shutoff valve is provided. Even with the lever, the water shutoff valve can be opened and closed reliably. Therefore, the structure of the interlocking mechanism can be simplified and the cost can be further reduced.

A second interlocking mechanism for operating the other one of the water amount adjusting valve and the gas amount adjusting valve, which is not the one adjusting valve, in association with the rotation of the rotating member is provided. The water amount adjusting valve and the gas amount adjusting valve may be operated together via the rotating member by one operation knob. here,
The other adjusting valve may be a slide valve having a valve body that is slidable in the axial direction. In this case, the second interlocking mechanism presses the valve body of the other adjusting valve in the axial direction. When,
And a cam for converting the rotational movement of the rotating member into the swinging movement of the lever. It should be noted that although a cam may be formed on the rotating member, this is because when a play occurs in the connecting portion between the rotating member and the valve body of the one adjustment valve, the rotation angle of the rotating member and the other Although there is no change in the relationship between the control valve and the operation amount of the adjustment valve, there is a play error in the relationship between the rotation angle of the rotating member and the operation amount of one of the adjustment valves, and the correlation between the water amount and the gas amount. Cause madness. On the other hand, if a cam is formed on the shaft portion for connecting the valve body of one adjustment valve to the rotating member and the cam is integrated with the valve body, the rotation angle of the rotating member and one adjustment Even if an error occurs in the relationship with the valve operation amount, the relationship between the operation amount of one adjustment valve and the operation amount of the other adjustment valve does not change, so the correlation between the water amount and the gas amount does not change. , Is advantageous. still,
The rotating member is preferably directly connected to the valve body of the water amount adjusting valve as described above, and the other adjusting valve is preferably a gas amount adjusting valve.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 1 denotes a water heater main body composed of a back plate 1a and a front cover 1b. The main body 1 has a gas burner 2 and a burner. And a heat exchanger 3 using 2 as a heat source, and
A water system valve unit 5 connected to the water pipe joint 4 at the lower end and a gas system valve unit 7 connected to the gas pipe joint 6 at the lower end are provided.

On the downstream side of the water system valve unit 5, a heat exchange water passage 8 passing through the heat exchanger 3 and a bypass water passage 9 are connected, and the downstream end of the heat exchange water passage 8 and the downstream end of the bypass water passage 9 are connected. Mixing part 1 provided at the center of the lower end of the water heater body 1
The hot water outlet head 11 was connected to the mixing portion 10 via a flexible tube 12 at a flow rate of 0.

In the gas system valve unit 7, as schematically shown in FIG. 3, a safety valve 70 including a solenoid valve, a water pressure responsive valve 71, a gas governor 72, and a gas amount adjusting valve 73 are arranged in this order from the upstream side. And are provided.

In the water system valve unit 5, as shown in FIG. 4, the water shutoff valve 50 and the water governor 5 are arranged in this order from the upstream side.
1 and a water amount adjusting valve 52 are provided. Stop valve 50
Is the valve chamber 5 of the water shutoff valve 50 connected to the water pipe joint 4.
0a and the water governor 51 are provided with a diaphragm valve 50c for closing a valve hole 50b formed in a partition member 53, and a pilot valve 50e provided in a back pressure chamber 50d defined by the diaphragm valve 50c, Diaphragm valve 50c
An orifice hole 50f that connects the valve chamber 50a and the back pressure chamber 50d and a pilot hole 50g that connects the back pressure chamber 50d and the water governor 51 are formed on the side of the diaphragm valve 50c. The pilot valve 50e normally closes the pilot hole 50g. Then, when the pilot valve 50e is retracted against the spring 50h to open the pilot hole 50g, the pressure in the back pressure chamber 50d decreases, and the diaphragm valve 50c retracts due to the pressure difference with the valve chamber 50a. Valve hole 50
b was opened and water was passed through the governor 51.

The water governor 51 has a valve body 5 inserted in a valve seat member 51c which defines a primary pressure chamber 51a and a secondary pressure chamber 51b.
1d and a diaphragm 51e on the side of the secondary pressure chamber 51b that connects the valve body 51d. A back pressure chamber 51f defined by the diaphragm 51e is provided in the venturi 55 provided at the outlet 54 for the heat exchange channel. Communication hole 5 to the negative pressure outlet 55a of
5b, the diaphragm 51e is deflected toward the back pressure chamber 51f side by the negative pressure generated in the venturi 55 when water is supplied by opening the water shutoff valve 50, and the diaphragm 51e.
The water pressure responsive valve 71 is opened via a rod 51g that is interlocked with.

The water amount adjusting valve 52 is provided with a cylindrical valve body 52b rotatably mounted in a cylindrical valve chamber 52a which communicates with the water governor 51 on the back side of FIG. ,
As shown in FIG. 5, the valve hole 5 facing the outlet 54 for the heat exchange channel
2c and the valve hole 52d facing the outlet 56 for the bypass waterway
And the amount of water passing through the heat exchange water passage 8 and the bypass water passage 9 can be increased or decreased by rotating the valve body 52b.

The gas amount adjusting valve 73 is operated by the lever 13 shown in FIG. 1 via the pinion 15 that engages with the fan-shaped rack 14 at the upper end thereof, but the water shutoff valve 50 and the water amount adjusting valve 52 are combined into a single unit. It is operated by the operation knob 16,
Hereinafter, the operation device of the water shutoff valve 50 and the water amount adjustment valve 52 will be described in detail.

The water system valve unit 5 includes a water quantity adjusting valve 52.
The shaft portion 52e of the valve body 52b of the above is arranged so as to face forward, and the operation rod 50i connected to the pilot valve 50e of the water shutoff valve 50 is arranged so as to face laterally outward, as shown in FIG. 5 and FIG. The operating device is mounted on a U-shaped mounting bracket 17 fixed to the front surface of the water system valve unit 5.

As shown in FIG. 7, the operating device includes an operating knob 1
6, a base board 18 screwed to the front end of the mounting bracket 17, a rotating member 19 rotatably held on the base board 18 about an axis in the front-rear direction, and a reciprocating motion in the front-rear direction on the base board 18. A reciprocating member 20 that is freely held, and a slider 21 that is slidably engaged with the rotating member 19 in the front-rear direction.
And a lever 22 pivotally attached to the mounting bracket 17.

The rotating member 19 has a cylindrical portion 19a which is rotatably fitted in a circular hole 18a formed in the base board 18, and claw portions 19b formed at a plurality of positions around the front end of the cylindrical portion 19a.
And a flange portion 19c at the rear end of the cylindrical portion 19a. When the cylindrical portion 19a is fitted into the circular hole 18a,
The claw portion 19b engages with the front edge of the circular hole 18a and the flange portion 19c abuts against the back surface of the base board 18 so that the rotating member 19 is prevented from coming off from the base board 18. The rear portion of the rotating member 19 is formed as a bottomed square tube portion 19d, and the slider 21 formed in a square tube shape is attached to the square tube portion 19d.
With the spring 21a provided between the rear end and the rear end of the square tubular portion 1,
9d, and thus, the slider 21 was prevented from rotating on the rotating member 19 and slidably engaged in the front-rear direction.

A push-push mechanism 23 is provided between the rotating member 19 and the slider 21. The push-push mechanism 23 has one end locked to the outer surface of the rear end of the square tubular portion 19d and the other end projected into the square tubular portion 19d through a slit hole 23a formed in one side surface of the square tubular portion 19d. 23b, a ring-shaped presser spring 23c for restricting the lifting of the locking pin 23b, and a heart-shaped cam groove 23d formed on one side surface of the slider 21. The other end of the locking pin 23b is adapted to engage with the cam groove 23d when inserted into the portion 19d. The slider 21 is provided with a locking pin and a rotating member 19
A push-push mechanism may be configured by providing a cam groove in the.

The reciprocating member 20 is formed in a cylindrical shape surrounding the square tubular portion 19d, and a pair of guide sleeves 20a, 20a extending forward are integrally formed at two locations around the outer periphery of the rectangular tubular portion 19d. The sleeve 20a, 20a on the base board 18
It can be externally inserted into a pair of rearwardly extending guide bars 18b, 18b which are integrally provided on the rear surface of the base plate, and thus the reciprocating member 20 can be supported against the base plate 18 so as to be reciprocally movable in the front-rear direction. I did it. A flange portion 20b is formed at the front end of the reciprocating member 20, and the slider 21
A claw portion 21b protruding outward through a slit groove 19e formed in the rotating member 19 and extending in the front-rear direction is formed, and the claw portion 21b is engaged with the flange portion 20b. The reciprocating member 20 and the reciprocating member 20 can be connected to each other in the front-rear direction while permitting relative rotation of the slider 21.

At the time of assembling the operating device, the rotating member 19
After inserting the slider 21 into the locking pin 23b, the locking pin 23b and the pressing spring 23c are assembled to the rotating member 19 and the locking pin 23b is inserted.
To engage the cam groove 23d to assemble the push-push mechanism 23.
0b to connect the slider 21 and the reciprocating member 20. In this connection, the reciprocating member 20 is externally inserted onto the rotating member 19 by aligning the phases so that the notch 20c of the flange portion 20b matches the claw portion 21b, and then the reciprocating member 20 is rotated to rotate the claw portion 21b. The flange portion 20b is engaged with.

In this way, the rotating member 19 and the slider 2 are
After subassembling 1, the push-push mechanism 23, and the reciprocating member 20, the subassembly body is assembled to the base board 18. At the time of this assembly, the cylindrical portion 19
While a is fitted in the circular hole 18a and the guide sleeve 20a is fitted on the guide bar 18b, the reciprocating member 20 is prevented from rotating with respect to the base board 18,
On the other hand, the rotation range of the rotation member 19 is restricted as shown in FIG. 8 by the stopper 19f protruding from the rotation member 19 and the pair of receiving portions 18c and 18d protruding from the back surface of the base board 18. The claw portion 21b of the slider 21 that is prevented from rotating by the moving member 19 is provided with the notch 2 of the flange portion 20b of the reciprocating member 20.
It does not rotate to the position that matches 0c, and the slider 2
The connection between 1 and the reciprocating member 20 is not released.

The rotating member 19 is provided with a pair of guide bars 19g, 19g projecting forward of the cylindrical portion 19a, and the slider 21 is provided with a shaft portion 21c projecting forward. A central boss hole 16a and a pair of boss holes 16b and 16b on both sides thereof are formed on the inner surface of the knob 16, and both guide bars 19g and 19g are slidably inserted into the boss holes 16b and 16b, and at the same time, the boss is inserted. Shaft 21c in hole 16a
Is fitted inside, and thus the operation knob 16 is prevented from rotating with respect to the rotating member 19 so that the operation knob 16 can be engaged with the slider 21 by the pushing operation of the operation knob 16.
Was moved backwards.

After assembling the operating device as described above, the base board 18 is screwed to the mounting bracket 17. According to this, the rotating member 19 is arranged in front of the water amount adjusting valve 52 coaxially. It will be. The rear end of the rotating member 19 is provided with a shaft portion 19h having a modified cross section extending rearward, and a modified cross-section hole formed in the shaft portion 52e of the valve body 52b of the water amount adjusting valve 52 is shown in FIG. The shaft portion 19h is fitted, and the rotating member 19 and the valve body 52b of the water amount adjusting valve 52 are directly connected.

Further, the convex portion 20d projecting from the rear end of the reciprocating member 20 abuts on one end of the lever 22, so that the reciprocating member 20
The water stop valve 50 is opened via the lever 22 by the backward movement of the valve. The lever 22 is an L-shaped lever having an intermediate portion pivotally supported by the mounting bracket 17 via a pivot 22a. The other end of the lever 22 is connected to the pilot valve 5 of the water shutoff valve 50.
When the lever 22 is swung counterclockwise in FIG. 6 by the backward movement of the reciprocating member 20 by engaging with the piece 50j at the outer end of the valve rod 50i connected as shown in FIG. The pilot valve 50e is pulled open against the spring 50h so that the water stop valve 50 is opened. The lever 22 is the spring 2
2b urges the water shutoff valve 50 in the closing direction, that is, in the clockwise direction in FIG. In the figure, 22c is a guide bar 18b and a guide sleeve 2 formed at one end of the lever 22.
It is an escape hole for 0a.

Further, the base board 18 is provided with a first switch SW1 interlocking with the rotating member 19 and a second switch SW2 interlocking with the reciprocating member 20. The first switch SW1 functions as a power switch of the combustion control circuit, and is turned on when the switch lever SW1a is pushed up by the flange portion 19c of the rotating member 19 to stop the rotating member 19 as shown in FIG. When 19f rotates to one rotation end position where it abuts on the receiving portion 18c,
The switch lever SW1a falls into the cutout portion 19h of the flange portion 19c so that the first switch SW1 is turned off.

The second switch SW2 functions as an ignition switch and, as shown in FIG. 9, is provided with a switch lever SW2a which cooperates with a cam projection 20e formed on one guide sleeve 20a of the reciprocating member 20. The switch lever SW2a is turned on when the switch lever SW2a is pushed up by the cam protrusion 20e by the backward movement of the reciprocating member 20.

Further, as shown in FIG. 3, a third switch SW3 interlocking with the water pressure responsive valve 71 is provided. The third switch SW3 functions as an opening switch of the safety valve 70, and cooperates with the piece 71a at the outer end of the water pressure responsive valve 71 that abuts the rod 51g of the water governor 51 to open the water pressure responsive valve 71. Sometimes turned on.

When the second switch SW2 and the third switch SW3 are turned on while the first switch SW1 is turned on, the safety valve 70 is opened and the igniter 24 attached to the gas burner 2 (see FIG. 1). Is activated and the gas burner 2
Is ignited. After ignition, the safety valve 70 is kept open for a certain period of time by a signal from the frame rod 25 attached to the gas burner 2, and then the safety valve 70 is kept open by the output of the thermocouple 26 for flame detection. In addition, a thermocouple 27 for detecting oxygen deficiency attached to the heat exchanger 3 is connected to the thermocouple 26 with a reverse polarity, and at the time of oxygen deficiency, the output of the thermocouple 26 is canceled by the output of the thermocouple 27. The safety valve 70 closes.

When the first switch SW1 is off, the safety valve 70 is not opened and the igniter 24 is not operated even if both the second and third switches SW2 and SW3 are turned on. The turning position where the first switch SW1 is turned off is set as the water position of the operation knob 16.

Next, the operation of the water heater will be described.

When the operating knob 16 is pushed at a rotational position other than the water position, the reciprocating member 20 is moved backward via the slider 21, and the forward movement turns on the second switch SW2 and the lever 22. The water shutoff valve 50 is opened via
Water is passed through the heat exchanger 3. Then, due to this water flow, the water pressure responsive valve 71 is opened via the rod 51g of the water governor 51, the third switch SW3 is turned on, and the safety valve 7
When 0 is opened, the igniter 24 is operated to ignite the gas burner 2, and hot water is discharged. After that, even if the pressing of the operation knob 16 is released, the reciprocating member 20 is locked at the forward moving position via the slider 21 by the push-push mechanism 23, and hot water is continuously discharged.

When the operating knob 16 is rotated, the rotating member 19
The valve body 52b of the water amount adjusting valve 52 is rotated via the water temperature adjusting valve 52, the amount of water passing through the heat exchanger 3 is increased or decreased, and the outlet heated water temperature is changed.
Thus, the hot water outlet temperature can be adjusted by rotating the operation knob 16, but when the operation knob 16 is rotated to the water position, the first switch SW1 is turned off, the safety valve 70 is closed, and the combustion of the gas burner 2 is stopped. As a result, water that is not heated is discharged.
In addition, water is also discharged when the operation knob 16 is pushed to the water position from the beginning.

In the above embodiment, the gas burner 2 is directly ignited by the igniter 24 when water is passed through the heat exchanger 3. However, the gas burner 2 is ignited even when the burner 2 is extinguished. A burner may be additionally provided so that the flame is transferred from the constant-fire burner to the gas burner 2 and ignited. In this case, the second and third switches SW2 and SW3 are unnecessary. When setting the water position, a gas valve closed when the first switch SW1 is turned off is used as a water pressure responsive valve in a passage portion connected to the main burner on the downstream side of the branch of the gas supply passage to the normal fire burner. Install in series.

Further, in the above embodiment, the gas amount adjusting valve 7
3 is operated by the lever 13, but an interlocking mechanism for operating the gas amount adjusting valve 73 in conjunction with the rotating member 19 is provided, and the water amount adjusting valve is operated by the single operation knob 16 via the rotating member 19. 52 and the gas amount adjusting valve 73 may be operated together. FIG. 10 shows such an embodiment. With this, the gas amount adjusting valve 73 is composed of a slide valve having a valve body (not shown) slidable in the axial direction, and the interlocking mechanism is connected to the valve body of the gas amount adjusting valve 73. And a cam 25 for converting the rotational movement of the rotating member 19 into the swinging movement of the lever 24. The gas amount adjusting valve 73 is configured to reduce the gas amount as the valve rod 73a is pushed.

The cam 25 is a valve body 52b of the water amount adjusting valve 52.
Is integrally formed with a shaft portion 52e for connection with the rotating member 19. The lever 24 is, as clearly shown in FIG.
An intermediate portion is pivotally supported by the mounting bracket 17 via a pivot 24a, and one end and the other end of the lever 24 are respectively cam 25
And the valve rod 73a of the gas amount adjusting valve 73.
Then, as the operation knob 16 rotates from the water position, the lever 24 is swung clockwise in FIG. 10 by the slope 25a of the cam 25, and the valve body of the gas amount adjusting valve 73 is a spring in the valve housing and the valve rod. 73a is moved in the direction of pushing out, that is, the opening side, and the amount of gas supplied to the burner 2 is increased. On the other hand, the water amount adjusting valve 52 is operated in a direction of decreasing the water amount by rotating the operation knob 16 from the water position, and the hot water outlet temperature rises due to the decrease of the water amount and the increase of the gas amount. If the cam 25 is integrated with the valve body 52b of the water amount adjusting valve 52 as in this embodiment, the cam 25 is rotated by the play of the connecting portion between the rotating member 19 and the valve body 52b of the water amount adjusting valve 52. Even if an error occurs in the relationship between the rotation angle of the member 19 and the operation amount of the water amount adjusting valve 52, the cam 25 determines the relationship between the operation amount of the water amount adjusting valve 52 and the operation amount of the gas amount adjusting valve 73. Maintained in a predetermined relationship. Therefore, the correlation between the water amount and the gas amount does not change, and the hot water temperature can be adjusted appropriately.

Reference numerals 17a and 17b in the figure denote the pivot 22a of the lever 22 for the water shutoff valve 50 and the lever 2 for the gas amount adjusting valve 73.
4 is a tongue-shaped shaft retainer bent to the mounting bracket 17 in order to prevent the pivot shaft 24a of FIG.

[0040]

As is apparent from the above description, according to the present invention, since tapping and temperature control can be performed by a single operation knob, operability is improved and assembly is facilitated. Manufacturing costs can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an example of a gas water heater equipped with the device of the present invention with a front cover removed.

FIG. 2 is a right side view of FIG.

FIG. 3 is a diagram schematically showing a gas valve unit.

FIG. 4 is a cutaway front view of the water valve unit.

FIG. 5 is a side view of the water valve unit with the operating device assembled.

6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is an exploded perspective view of the operating device.

FIG. 8 is a diagram illustrating an on / off operation of a first switch.

FIG. 9 is a diagram for explaining an on / off operation of a second switch.

FIG. 10 is a sectional view corresponding to FIG. 6 of another embodiment.

FIG. 11 is a perspective view of the main part.

[Explanation of symbols]

2 Gas burner 3 Heat exchanger 5 Water system valve unit 50 Water stop valve 52 Water amount adjusting valve 7 Gas system valve unit 71 Water pressure responsive valve 72 Gas amount adjusting valve 16 Operation knob 17 Mounting bracket 18 Base panel 19 Rotating member 20 Reciprocating member 21 Slider 22 Lever 23 Push-push mechanism 24 Lever 25 Cam

Claims (7)

[Claims] 1. A water burner having a heat exchanger using a gas burner as a heat source, wherein a water valve unit for controlling water flow to the heat exchanger is provided with at least two valves of a water shutoff valve and a water amount adjusting valve, and a gas burner. A gas system valve unit for controlling gas supply to the heat exchanger is provided with at least two valves, a water pressure responsive valve that opens when water is passed through the heat exchanger by opening a water shutoff valve, and a gas amount adjusting valve. In an operating device applied to a gas water heater, it is directly connected to the valve body of one of the water amount adjusting valve and the gas amount adjusting valve, which is rotatably arranged coaxially with one of the adjusting valves. Rotating member, a reciprocating member that is arranged so as to reciprocate in the axial direction of the rotating member and that opens and closes the water shutoff valve through an interlocking mechanism, and a relative movement in the axial direction that prevents rotation of the rotating member. And the operating knob engaged with the reciprocating member. And is connected so as to be moved forward in the axial direction by the push operation of the operation knob, and the reciprocating member is locked at the forward movement position after the first push operation of the operation knob, and the second push of the operation knob is pressed. A push-push mechanism is provided to return the reciprocating member to the return position after the operation.The water stop valve is opened at the reciprocating member's forward position, and the water stop valve is closed at the reciprocating member's return position. A device for operating a gas water heater characterized by the above. 2. A slider and a reciprocating member which are slidably engaged with each other by locking a slider, which is moved forward in the axial direction by the pushing operation of the operation knob, to the rotating member so as to be slidable in the axial direction. 2. The operating device for a gas water heater according to claim 1, wherein the push-push mechanism is provided between the rotating member and the slider while being connected in the axial direction so as to allow relative rotation. 3. The one regulating valve is a water amount regulating valve,
The operating device for a gas water heater according to claim 1 or 2, wherein the interlocking mechanism comprises a lever. 4. A second interlocking mechanism for operating the other one of the water amount adjusting valve and the gas amount adjusting valve, which is not the one adjusting valve, in association with the rotation of the rotating member. The operating device for a gas water heater according to claim 1 or 2. 5. The other adjusting valve is a slide valve having a valve body that is slidable in the axial direction, and the second interlocking mechanism is a lever that presses the valve body of the other adjusting valve in the axial direction. The operating device for the gas water heater according to claim 4, characterized by comprising: a cam for converting the rotational movement of the rotating member into a swinging movement of a lever. 6. The operating device for a gas water heater according to claim 5, wherein the cam is formed on a shaft portion for connecting the valve member of the one adjusting valve to the rotating member. 7. The operating device for a gas water heater according to claim 4, wherein the other adjusting valve is a gas amount adjusting valve.