JPH07190481A - Gas water heater - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a gas water heater with a simple structure capable of performing ignition, hot water discharge operation, and adjusting hot water temperature with one operation knob. A gas burner 2 having a gas safety valve and a gas supply path provided with a gas amount adjusting valve 4, a heat exchange valve having a water shutoff valve and a water amount adjusting valve 3, and a gas safety valve,
A gas water heater comprising a gas amount adjusting valve 4, a water shutoff valve, and an operating mechanism 6 for operating the water amount adjusting valve 3, wherein the operating mechanism 6 includes a reciprocating member 9 that reciprocates in the axial direction, and The reciprocating member 9 is arranged coaxially with the reciprocating member 9 and is provided so as to be independently rotatable. The reciprocating member 9 operates a gas safety valve and a water shutoff valve to rotate. The member 7 is a gas water heater that operates the gas amount adjusting valve 4 and the water amount adjusting valve 3 to adjust the hot water discharge temperature.
Or, it is arranged on the axis of either one of the water flow control valves 3,
Valve bodies 41, 3 of the gas amount adjusting valve 4 or the water amount adjusting valve 3
1 is rotated directly.

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 for performing hot water discharge operation and hot water temperature adjustment operation with a single operation knob.

[0002]

2. Description of the Related Art Gas boiling for improving operability by enabling operations such as ignition, tapping and extinguishing of a fire, stop of tapping and adjustment of tapping temperature by one operating knob or one operating mechanism. Vessels have been proposed.

[0003]

However, the conventional operating mechanism has a complicated structure such as using a gear, has a large number of parts, lacks durability and reliability, and is troublesome to assemble, resulting in a high manufacturing cost. There was a drawback.
An object of the present invention is to provide a gas water heater which has a simple structure and is capable of performing ignition, hot water discharge operation and hot water discharge temperature adjustment with a single operation knob.

[0004]

According to the present invention, there is provided a gas burner having a gas safety valve for opening and closing a gas passage, and a gas supply passage provided with a gas amount adjusting valve, a water shutoff valve, and a water amount adjusting valve. A heat exchanger and a gas safety valve, the gas amount adjusting valve, an operation mechanism for operating the water shutoff valve and the water amount adjusting valve, wherein the operating mechanism is an axial direction The reciprocating member includes a reciprocating member that reciprocates, and a rotating member that is coaxially disposed on the reciprocating member and that is independently rotatable. The reciprocating member includes the water shutoff valve. In the gas water heater which operates, the rotating member operates the gas amount adjusting valve and the water amount adjusting valve to adjust the hot water discharge temperature, the rotating member includes the gas amount adjusting valve or the water amount adjusting valve. Placed on either axis,
Further, it is characterized in that it is connected to the valve body of the gas amount adjusting valve or the water amount adjusting valve and the valve body is directly rotated.

In the gas water heater of the second aspect, the rotating member and the valve body are directly connected in a separable manner. 4. The gas water heater according to claim 3, wherein the gas water heater has a control circuit, the gas safety valve is a solenoid valve, and the water shutoff valve is an electric valve that is opened and closed by an electric water shutoff valve drive means. A switch is attached to the reciprocating member, and the water shutoff valve is opened and closed by the control circuit that receives an on / off signal of the switch due to reciprocating motion of the reciprocating member. Claim 4
In the gas water heater, the reciprocating member and the rotating member are reciprocally moved and rotated in the axial direction by a single operation knob. In the gas water heater according to claim 6, a cylindrical cam is formed on the rotating member, and the other of the gas amount adjusting valve and the water amount adjusting valve has a valve opening degree due to reciprocating movement of the valve body. And a link member that adjusts the valve opening by displacing the valve body of either the gas amount adjusting valve or the water amount adjusting valve in association with the rotation of the cylindrical cam.

[0006]

According to the present invention, the valve opening of one of the gas amount adjusting valve and the water amount adjusting valve is directly turned by the turning action of the turning member to adjust the valve opening degree. . Therefore, the required number of parts is small, the durability and reliability are excellent, the assembling is easy, and the manufacturing cost can be reduced. According to the second aspect of the invention, it becomes easy to assemble the rotating member and the valve body of either the gas amount adjusting valve or the water amount adjusting valve. According to the third aspect of the present invention, the switch is turned on / off by the reciprocating member to carry out hot water discharge and stop hot water discharge. With the configurations of claims 4 and 5, operability can be further improved. In the structure of claims 6 and 7, since the other valve element of the gas amount adjusting valve or the water amount adjusting valve is operated by the link mechanism having a simple structure, it is excellent in durability and reliability and easy to assemble. In addition, the manufacturing cost can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of a water heater. The water heater comprises a water supply passage 11 connected to a water supply, a heat exchanger 12 arranged at an upper part, and a heat exchange water passage 1 in which a hot water outlet pipe 13 having a flexible pipe at the end is connected in series. A bypass water channel 111 that branches and joins the hot water outlet pipe 13 without passing through the heat exchanger 12, a burner main body 21 and a gas burner 2 that heats the heat exchanger 12 and includes a gas supply path 22 to the burner main body 21 are provided. . The water supply passage 11 is formed in the water valve body 10 made of die cast. In the water valve body 10, a water stop valve 15 that is opened and closed by the operation of a water stop valve drive means 14 including a drive motor is provided.
A water governor 16 is installed downstream thereof, and a water amount adjusting valve 3 is provided further downstream thereof.

The burner body 21 is provided with a sparker 23 for ignition, a frame rod 24 for ignition detection, a thermocouple 25 for misfire detection, and a reverse bias thermocouple 26 as an oxygen deficiency sensor. The gas supply passage 22 is formed in the die-cast gas valve body 20.
Inside the gas valve body 20, an electromagnetic gas safety valve 27, a hydraulic automatic gas valve 28 interlocking with the water governor 16, a gas governor 29, and a gas amount adjusting valve 4 are sequentially provided from the upstream side. A control circuit 5 is attached to the water heater, which activates the sparker 23 and the safety valve 27, and maintains the safety valve 27 in the normally open state by the output signals of the frame rod 24 and the thermocouples 25 and 26. The gas burner 2 is controlled so that it closes in the event of an abnormality, and controls the ignition, extinguishing, start and stop of hot water supply, and operation as a safety device.

An operating mechanism 6 is provided on the front surface of the water heater, and the water amount adjusting valve 3 and the gas amount adjusting valve 4 are manually operated.
The control circuit 5 can be operated while adjusting the valve opening degree. The operation mechanism 6 includes a water shutoff valve driving micro switch 51 which is turned on and off by a forward and backward operation of an operation knob 60 appearing on the front of the water heater, and a combustion control which is turned on and off by a rotation operation of the operation knob 60. Micro switches 52, 52 are attached. The water governor 16 is provided with a water flow detection micro switch 53 for detecting water flow. These micro switches 5
The outputs of 1 to 53 are input to the control circuit 5.

As shown in FIGS. 2 to 6, the operating mechanism 6 includes a bracket 6 fastened to the front surface of the water valve body 10.
1 is attached. The operating means 6 is a cylindrical housing 63 fastened to the tip of the bracket by a screw 62 (see FIGS. 4 and 5), and is rotatably held in the housing 63, and the valve body 31 of the water amount adjusting valve 3 is provided. The rotating member 7 is provided coaxially on the axis (see FIGS. 2, 3, and 7). The housing 63 includes a cylindrical portion 64, a flange portion 65 provided on the outer periphery of the cylindrical portion 64, a fastening seat 66 (see FIGS. 4, 5, and 6) extending from the flange portion 65, and a microswitch fastening. Wall 67 (see FIGS. 2, 3 and 6)
Have.

The rotating member 7 is made of resin and is shown in FIG.
As shown in FIG. 7, a tubular portion 71 that slides in the rotational direction with respect to the inner wall of the tubular portion 64, a locking portion 72 a formed at the distal end portion of the tubular portion 71 and locked to the distal end surface of the tubular portion 64, the tubular portion 71 A collar portion 72b formed on the rear end portion of the tubular portion 64 and slidingly contacting the rear end surface of the tubular portion 64,
An intermediate body portion 73 extending to the rear end side of the tubular portion 71, and a connecting rod portion 74 extending from the intermediate body portion 73 to the rear end side.
Have. In addition, the cylindrical portion 71 of the rotating member 7 is provided with a pair of operation knobs 75, 7 of operation knobs projecting forward of the cylindrical portion 64.
5 (shown in FIGS. 2 and 3) is formed, and the intermediate body portion 7 is formed.
3 is a circumferential cam plate 76 and an axial slit 70.
(Shown in FIG. 4) are formed. The tip of the connecting rod portion 74 is inserted into the shaft hole of the end portion 32 of the valve body 31 of the water amount adjusting valve 3 projecting from the water valve body 10 and is integrally connected, and by the rotation of the rotating member 7. The valve body 31 is designed to rotate integrally. The connection between the tip of the connecting rod portion 74 and the end portion 32 of the valve body may be achieved by integrally molding both members, and may be directly and detachably attached by spline fitting, connection by a two-face width and a slit, or the like. May be connected to. The former has an advantage that the number of parts is reduced, and the latter can improve the assembling property.

A cylindrical cam 77 is formed on the rear end surface of the intermediate body portion 73 of the rotating member 7. The valve body 41 of the gas amount adjusting valve 4 is displaced in the front-rear direction in association with the rotation of the cylindrical cam 77. The link mechanism 8 for displacing the link arm 80 for adjusting the opening degree is attached. The link mechanism 8 has one end 81
Is rotatably pin-jointed to the bracket 61, and a hole 82 (FIG.
(Shown in FIG. 2), and the other end 83 acts on the tip end of the push rod 42 projecting from the valve body 41 of the gas amount adjusting valve 4 to the outside of the gas valve body 20 (FIG. 2, FIG. 3, FIG. 7) is provided. On the other end side of the hole 82 of the link arm 80, a working surface 85 is provided which bulges into a cylindrical surface shape and contacts the cylindrical cam 77.

A reciprocating member 9 is mounted on the cylindrical housing 63 to reciprocate in the front-rear direction in order to operate the water stop valve driving means 14 including a drive motor and open and close the water stop valve 15. The reciprocating member 9 includes a shaft rod portion 91 having a hollow portion that is attached to the center of the cylindrical portion 71 and has a spring housed therein, and the slit 7 from the shaft rod portion 91.
Connecting claw 92 protruding through 0 (see FIGS. 4 and 7)
A pressing member 93, a guide wheel 94 slidably fitted on the intermediate body portion 73, a guide rod 68 protruding from the collar portion 65 in parallel with the reciprocating member 9, and a guide. The guide rod 6 is integrally formed on the outer periphery of the ring 94.
8 and a working cylinder 95 that is loosely fitted therein. At the tip of the reciprocating member 9, a knob mounting shaft 97 with a rotation stopping surface 96 is provided in a projecting manner, and the operating knob 60 is fitted to the knob mounting shaft 97 and the engaging rods 75, 75 of the pair of operating knobs. Is installed.

The water shutoff valve driving microswitch 51 and combustion control microswitches 52, 52 are fixed to the rear surface of the microswitch fastening wall 67. When the action cylinder 95 is moved backward (the operation knob 60 is pressed), the water shutoff valve driving microswitch 51 is turned on, the water valve opening / closing motor is driven, and the water shutoff valve 15 is opened / closed.
Further, by rotating the rotating member 7 to rotate the cam plate 76, the combustion control micro-switches 52, 52 are turned on and off, switching between hot water and water, and a forced hold time according to the amount of combustion. Is set.

The operation of this water heater will be described. Operating means 6
Push in the operation knob 60 attached to the tip of the. As a result, the water shutoff valve driving micro switch 51 is turned on and the water shutoff valve 15 is opened. Due to this valve opening, a water flow is generated, the water governor 16 is displaced to the left as shown in FIG. 1, and the hydraulic automatic gas valve 28 linked with this is opened, and the attached automatic hydraulic gas valve 28 is opened.
Safety valve 27 by the output of the micro switch 53 for water flow detection
Is opened and spark discharge is generated in the Sparker 23,
The gas burner ignites and hot water is discharged at a desired temperature.

To adjust the hot water temperature, the rotary member 7 is rotated by the rotation of the operating knob 60, and the valve body 31 of the water amount adjusting valve 3 directly connected to the rotary member 7 is rotated to rotate a predetermined valve. At the same time as the opening degree, the cylindrical cam 77 acts on the working surface 8 of the link arm 80.
5 is pressed to push the valve body 41 of the gas amount adjusting valve 4 into a position where the working surface 84 of the other end 83 has a predetermined valve opening degree. When the operation knob 60 is turned to the water position, the combustion control micro switch 52 for switching between hot water and water is turned off, and the operation of the safety valve 27 and the operation of the ignition device are stopped, so that the gas burner 2 is ignited. Without, heated water is obtained. It is also possible to start the hot water discharge by pushing the operation knob 60 after setting the operation knob 60 at a predetermined hot water temperature position.

In the above embodiment, the rotating member 7 and the valve body 31 of the water amount adjusting valve 3 are integrally connected, but either one of the spline fitting, the tip of the rotating member 7 and the valve body 31 is connected. Fitting of the width across flats on the other side and the slit on the other side,
Of course, other coaxial coupling means can be used. Further, in the above embodiment, the operating mechanism 6 is arranged coaxially with the water amount adjusting valve 3, but the operating mechanism 6 may be installed coaxially with the gas amount adjusting valve 4. In this case, the valve body 41 of the gas amount adjusting valve 4 is a rotary type, the valve body 31 of the water amount adjusting valve 3 is a reciprocating type, and the valve body 31 of the water amount adjusting valve 3 is pressed and driven by the link mechanism 8.

[Brief description of drawings]

FIG. 1 is an overall conceptual diagram of a gas water heater.

FIG. 2 is a left side view (partially sectional view) of the operating means.

FIG. 3 is a left side view (partially sectional view) of the operating means.

FIG. 4 is a cross-sectional plan view of the operating means.

FIG. 5 is a bottom view of the operating means.

FIG. 6 is a front view of the operating means with an operating knob removed.

FIG. 7 is a perspective view of a main part of the operating means.

[Explanation of symbols]

 1 Heat Exchange Channel 2 Gas Burner 3 Water Volume Control Valve 4 Gas Volume Control Valve 5 Control Circuit 6 Operating Mechanism 7 Rotating Member 8 Link Mechanism 9 Front-to-Back Reciprocating Member 60 Operating Knob

Claims (7)

[Claims] 1. A gas burner provided with a gas safety valve for opening and closing a gas passage, and a gas supply passage provided with a gas amount adjusting valve, a water shutoff valve, and a heat exchange passage provided with a water amount adjusting valve, and the gas. A gas water heater comprising a safety valve, the gas amount adjusting valve, an operating mechanism for operating the water shutoff valve and the water amount adjusting valve, wherein the operating mechanism is a reciprocating member that reciprocates in the axial direction, A reciprocating member which is coaxially disposed on the reciprocating member and is rotatably provided independently of the reciprocating member, the reciprocating member actuating the water shutoff valve; In a gas water heater that operates the gas amount adjusting valve and the water amount adjusting valve to adjust the hot water outlet temperature, the rotating member is arranged on an axis of either the gas amount adjusting valve or the water amount adjusting valve. And of the gas amount adjusting valve or the water amount adjusting valve Gas water heaters, characterized in that to directly rotate the valve body while being connected to the body. 2. The gas water heater according to claim 1, wherein the rotating member is detachably connected to the valve body. 3. The gas water heater according to claim 1, wherein the gas water heater has a control circuit, the gas safety valve is an electromagnetic valve, and the water shutoff valve is an electric valve that is opened and closed by an electric water shutoff valve drive means. There is an electric switch attached to the reciprocating member, and the water shutoff valve is opened and closed by the control circuit that receives an on / off signal of the electric switch due to reciprocating movement of the reciprocating member. Characteristic gas water heater. 4. The gas water heater according to claim 1, wherein the reciprocating member and the rotating member are reciprocally moved and rotated in an axial direction by a single operation knob, respectively. 5. The operating knob according to claim 4,
A gas water heater characterized in that it can be moved back and forth at any rotation position. 6. The cylindrical member according to claim 1, wherein the rotating member is formed with a cylindrical cam, and the other of the gas amount adjusting valve and the water amount adjusting valve has a valve opening degree due to reciprocating movement of a valve element. And a link member that adjusts the valve opening by displacing the valve body of either the gas amount adjusting valve or the water amount adjusting valve in association with the rotation of the cylindrical cam. Gas water heater. 7. The link member according to claim 6,
A gas water heater, wherein one end is rotatably supported, an interlocking surface with the cylindrical cam is provided in the middle, and the other end is a portion acting on the other valve body.