JP3072187B2 - Water heater igniter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter for a water heater.

[0002]

2. Description of the Related Art As an ignition device for a water heater in which a single motor controls opening and closing of a water faucet, an electromagnetic safety valve, an instrument faucet, etc., as disclosed in, for example, Japanese Patent Application Laid-Open No. 62-66055. A structure that opens and closes a water stopcock through a gear that transmits motor drive by forward and reverse rotation of a motor, a gear for a water stopcock, and a gear with a cam for a gas valve, and simultaneously opens and closes a gas valve having a safety valve. (See especially FIGS. 3 and 4).

[0003]

In the above prior art, the following problems have been encountered in operating each valve by forward and reverse rotation of the motor.

There is a problem that a gas valve having a safety valve pushes uselessly twice by a gear with a cam.

Since the cam taper needs to be provided before and after opening the valve, the ascending taper of the cam becomes a steep angle and the load on the motor increases, resulting in a significant loss of battery energy and an endurance of the motor brush. The nature also decreases.

[0006] Since the forward and reverse rotation control of the motor is required, the electrical equipment sequence is complicated, and there is a possibility of malfunction.

The opening and closing of the water stopcock and the gas valve is controlled through the gear for transmitting the motor drive, the gear for the water stopcock, and the gear with a cam for the gas valve. Is also complicated, resulting in high costs.

In view of the above-mentioned problems of the prior art, the present invention eliminates the control by forward and reverse rotation of the motor and uses a cam control of 360 ° in one direction, so that the process from ignition and tapping to extinguishing and stopping the tapping can be performed. An object of the present invention is to provide an ignition device for a water heater that can be safely operated at a light load without malfunction.

[0009]

In order to achieve the object of the present onset to solve the above problems
The water heater igniter according to claim 1 drives a motor.
Tap the faucet, electromagnetic safety valve, instrument plug, etc.
In a water heater driven by changing the timing, the rotating cam
Faucet, electromagnetic within the range of 360 ° rotation in one direction
Extinguishing and stopping hot water from ignition and tapping of safety valves, instrument plugs, etc.
And summarized in that has a structure for driving the or in. Also,
The point of the water heater according to claim 2 of the present invention which solves the above problems.
The igniter for a water heater according to claim 1,
The tapered shape of the rotating cam should be a gentle climbing taper.
And the summary.

[0010] Claims of the present invention for solving the above problems.
The igniter for a water heater according to claim 3 is described in claim 1 or 2.
In the water heater igniter, the faucet, the electromagnetic safety
The rotation of the rotating cam required for the individual valve opening drive of the valve and the device stopper
The rotating cam required to extinguish the fire and stop hot water rather than the rolling torque
The gist is that the rotational torque of is set small. Ma
The water heater according to claim 4, which solves the above-mentioned problem.
The igniter for a water heater according to any one of claims 1 to 3.
In the above, the water faucet, the electromagnetic safety valve, the instrument stopper
Fire extinguishing than the rotation angle of the rotating cam required for each valve opening drive
・ The rotation angle of the rotating cam required to stop hot water is set small.
The gist is that it has been specified.

[0011]

According to the first aspect of the present invention, the water heater having the above configuration is provided.
The igniter of the vessel uses a motor as the drive source and the rotating cam moves in one direction.
While rotating 360 °, turn off the faucet, electromagnetic safety valve, and instrument stopper.
It works to ignite and tap water, and also has a faucet, solenoid valve,
The equipment plug is driven to extinguish the fire and stop the hot water supply.

[0012] The present invention having the above-mentioned structure has a second aspect.
The igniter for a water heater according to claim 1 is characterized in that the water heater according to claim 1 is used.
In a fire device, the rotating cam rotates and a gentle climb
The faucet, the electromagnetic safety valve, and the instrument faucet are opened.

Further, the present invention has the above-mentioned structure.
The igniter for a water heater according to claim 1, wherein the hot water according to claim 1 or 2.
In the case of the boiler ignition device, the required time for
Number of rolling rotational torque of the cam is, faucets, electromagnetic safety valve, plug fitting
Smaller than the rotating torque of the rotating cam required for each valve opening drive.
Is set. For this reason, the sliding resistance increases,
Even if the capacity or power decreases,
When the valve can be opened, it has fire extinguishing and hot water stopping capabilities.
I can. Therefore, the safety of the water heater is improved.

Further, the present invention has the above-mentioned structure.
The igniter for a water heater according to any one of claims 1 to 3.
Rotation required for fire extinguishing and hot water stop
When the rotation angle of the cam is
Set the rotation angle smaller than the rotation angle of the rotation cam required for valve opening drive.
Is determined. Therefore, it is necessary to open any of the valves.
It is possible to extinguish fires and stop hot water in a shorter time than the time required. Obedience
Thus, the safety of the water heater is improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water heater igniter according to the present invention will be described below with reference to the drawings.

1 to 4 show the assembled state of the cam box, FIG. 5 shows the shape of the rotating cam, and FIGS. 6 to 10 show the shapes of the respective cams. And a geared motor with a deceleration gear. That is, the first intermediate large gear 2 is meshed with the motor-driven small gear 1, the second intermediate large gear 4 is meshed with the first intermediate small gear 3 integrated with the first intermediate large gear 2, and the second intermediate large gear 4 is meshed with the first intermediate large gear 2. A second intermediate small gear 5 integral with the large gear 4 meshes with a large gear 7 centered on a cam shaft 6 to reduce the rotation of the motor to a predetermined speed predetermined by the reduction gear group, thereby causing the rotation cam A to rotate. It is a structure to transmit to. (See FIGS. 1 and 4)

A is a rotary cam, with the cam shaft 6 as the center,
In addition to forcibly opening an electromagnetic safety valve MV, which will be described later, in conjunction with the motor M, a single motor is also used to control the opening and closing of the gas side valve such as the instrument tap V and the water side valve such as the faucet WV. A so-called motor valve, which is operated via a rotary cam A as a source, is configured.

The rotary cam A is composed of a cam 8 for faucet, a cam 9 for faucet, a cam 10 for electromagnetic safety valve, and cams 11 and 12 for cam switches. It is rotatably housed and installed inside (see FIG. 1).

As shown in FIGS. 3 and 6, the faucet cam 8 has a predetermined angle (eg, a rotation angle of 0 ° to 72 °) in one direction during ignition and tapping. The cam surface 8a that opens the faucet (for example, a diaphragm type water supply valve) WV by fully rotating, the road (for example, the rotation angle range of 72 ° to 305 °) leading to tapping and the tapping during the tapping. A cam surface 8b for holding the faucet WV fully open (for example, a rotation angle position of 305 °) and a cam for completely closing the faucet WV when fire extinguishing and hot water supply are stopped (for example, a rotation angle position of 337 °). And a surface 8c.

As shown in FIG. 2 and FIG. 8, the instrument stopper cam 9 has a predetermined angle (for example, 255 ° to 30 °) after the opening of the electromagnetic safety valve MV during ignition and tapping.
The cam surface 9 with the instrument plug V fully open at a rotation angle range of 5 °)
a and a cam surface 9b for fully closing the instrument plug V at the time of extinguishing and stopping hot water (for example, at a rotation angle position of 337 °).

As shown in FIGS. 9 and 10, the electromagnetic safety valve cam 10 is integrally provided on one side surface of a cam 12 for a cam switch, which will be described later. A preset angle (for example, 80 ° to
The electromagnetic safety valve MV is pushed open in a rotation angle range of 250 °, and the angle until the suction open is held (for example, 230 °).
After a rotation angle range of up to 250 ° has passed, cam tapers 10a and 10b for releasing the pressing are provided in opposition, and a diameter difference is provided so that the opposing cam 17 can be operated with both ends.

As shown in FIG. 7, the cam 11 for the cam switch has a predetermined angle in one direction (for example, a rotation angle range of 70 ° to 80 °) during ignition and tapping. Activate the cam switch S1 to set the faucet W
A cam surface 11a for detecting the full opening of V, and a cam surface 11b for detecting a combustion position (for example, a rotation angle position of 305 °).
It has a structure provided with.

As shown in FIG. 9, the cam 12 for the cam switch is provided at a predetermined angle (for example, a rotation angle range of 190 ° to 202 °) in one direction at the time of ignition and tapping. A cam surface 12a for detecting the full opening of the electromagnetic safety valve MV by operating the cam switch S2, and a fire extinguishing position (stop position) (for example, a 334 ° rotational angle position).
And a cam surface 12b for detecting the

A valve shaft (not shown) of the faucet WV is connected to the faucet cam 8 via a slider 13 and a lever 14, and the faucet cam 8 controls opening and closing of the faucet WV. Things.

Further, the instrument stopper cam 9 has an instrument stopper V
The valve shaft 15 is connected via a slider 16 and the device stopper cam 9 is used to control opening and closing of the device stopper V.

Further, the cam 10 for the electromagnetic safety valve has a cam taper 17a, 1 having the same shape as the cam 10 for the electromagnetic safety valve.
The electromagnetic safety valve MV is pushed and released by the electromagnetic safety valve cam 10 by associating the valve stem 18 of the electromagnetic safety valve MV via a slider 17 having 7b.

The electromagnetic safety valve MV is composed of a safety valve 20 and an electromagnet 21 urged in the closing direction by the spring 19, and the electromagnetic switch from the controller is activated by the operation of the cam switch S2 immediately before the electromagnetic safety valve cam 10 is forcibly opened. The holding valve 21 is turned on when the holding current is turned on, and the safety valve 20 is automatically closed when the holding current is turned off.

Further, cams 11 and 12 for cam switches are provided.
The cam switches S1 and S2 are operated by the operating levers 22 and 23, respectively.
The cam switches S1 and S2 are turned on and off by the cam switches 11 and 12, respectively.

In the water heater igniter of the embodiment,
The operation will be described below with reference to FIG.

When igniting an operation button or the like (not shown) for ignition and tapping, an ignition switch (not shown) is turned on.
N, the motor M is started, and the deceleration gear groups 1, 2, 2,
A predetermined deceleration rotation set in advance is applied to the integral rotary cam A via 3, 4, and 5, and the rotary cam A is rotated in one direction (clockwise in the drawing) with the cam shaft 6 as a central axis.

Therefore, when the rotating cam A is rotated to a predetermined angle (for example, 72 °), the cam surface 8a of the faucet cam 8 is rotated within a rotation angle range of, for example, 0 ° to 72 °. The faucet WV with slider 13 and lever 1
4, and the water is passed to a heat exchanger (not shown).
The cam surface 11 in the rotation angle range of 70 ° to 80 °
At a, the cam switch S1 is turned on via the operation lever 22 to detect the full opening of the faucet WV, and the motor M is turned on until the water pressure switch (not shown) detects the flow of water to the heat exchanger and turns on. Stop once.

When the water pressure switch detects the passage of water and turns on, the motor M is started again, and the rotary cam A continues to rotate in one direction. At this time, a water pressure automatic gas valve (not shown)
Is a water supply pressure by passing water through the heat exchanger and has already been opened via a water pressure response device (not shown).

Therefore, when the rotary cam A is rotated to a predetermined angle (for example, 230 °), the cam convex of the electromagnetic safety valve cam 10 is rotated in the range of, for example, 80 to 230 °. The safety valves 20 of the electromagnetic safety valve MV are fully opened and opened via the slider 17 and the valve rod 18 and simultaneously pressed against the electromagnet 21 by the strips 10a and 10b.

Then, the cam 12 for the cam switch integrated with the cam 10 for the electromagnetic safety valve, for example, from 190 ° to 202 °
When the cam switch S2 is turned ON via the operating lever 23 on the cam surface 12a in the rotation angle range of ° and the full opening and immediately before pressing of the electromagnetic safety valve MV are detected, the holding current to the igniter and the electromagnet 21 is turned ON. The safety valve 20 of the electromagnetic safety valve MV is attracted to the electromagnet 21 to be held open, and the ignition spark is discharged from the electrode by the discharge of the igniter. The rotating cam A is, for example, 250
° rotation angle position, the solenoid valve safety cam 10
Of the electromagnetic safety valve MV is released.

Thereafter, when the rotating cam A is rotated to a predetermined angle (for example, 305 °), for example, in a rotation angle range of 255 ° to 305 °,
The instrument stopper V is moved to the slider 16 by the cam surface 9a of the instrument stopper cam 9.
The fuel gas is supplied to a main burner (not shown) fully opened through the valve shaft 15 and ignited by sparks from the electrodes, and the main burner burns to start tapping.

At this time, the combustion position (for example, 305 °)
When the cam switch S1 turns off the cam switch S1 by the cam switch cam 11, the motor M is stopped, and a series of ignition and the start of tapping are completed. The time required for the ignition and the start of tapping is about 1 second.

Next, when the operation button is extinguished to extinguish the fire and stop the hot water supply, when the ignition switch is released from the ON state and the holding current of the electromagnetic safety valve MV to the electromagnet 21 is turned off, the motor M is started and the rotary cam A is ignited. As in the case of the above, the motor rotates in a reduced speed in one direction.

When the rotary cam A is rotated to a predetermined angle (for example, 337 °), the cam of the faucet cam 8 is rotated within the range of 305 ° to 337 °. The fully open holding of the faucet WV by the surface 8b is released by the cam surface 8c, and the cam surface 9a of the instrument stopper cam 9 is released.
Release of the instrument tap V by the cam surface 9b and the faucet W
V and the instrument stopper V are both closed.

At this time, the fire extinguishing position (for example, 337 °
When the cam switch S2 is turned off by the cam switch cam 12, the motor M is stopped in conjunction with the turning off of the water pressure switch, and a series of fire extinguishing and hot water stopping operations are completed.

In the embodiment, the rotation cam A is set at 337 ° to 337 °.
The rotation angle range of 0 ° is a play angle, but in practice, it corresponds to ignition and tapping, and when the power switch is turned on,
Rotating cam A is at 337 ° of the fire extinguishing position (stop position),
When the ignition switch is turned on, the water tap is temporarily stopped at a position where the water tap is opened from the fire extinguishing position (eg, at 72 °), and stopped at the combustion position (eg, 305 °) by turning on the water pressure switch. The valve is opened in the order of WV → electromagnetic safety valve MV → instrument plug V.

The relationship between the rotational angle of each of the cams 8, 9, 10, 11, and 12 and the cam torque of the rotary cam A during the ignition and tapping, the fire extinguishing, and the stoppage of tapping by the above-described 360 ° unidirectional cam control were measured. However, it was as shown in FIG.

The relationship between the rotation angle of the faucet cam 8 and the cam torque is such that when the faucet WV starts to be opened by the cam surface 8a (for example, at a position of 0 °), 2249 to 1398 g ·
mm and then gradually rises to 2769 g when the faucet WV is fully opened (for example, at a rotation angle position of 72 °).
Mm. In the subsequent holding of the faucet WV fully open to the fire extinguishing position by the cam surface 8b (for example, a rotation angle range of 72 ° to 337 °), the temperature was reduced to 587.4 g · mm.

The relationship between the rotation angle of the electromagnetic safety valve cam 10 and the cam torque is, for example, 110 ° from 767 g · mm at the start of the opening operation of the electromagnetic safety valve MV by the cam tapers 10a and 10b (for example, at a position of approximately 90 °). Once it rises to 844 g · mm in the vicinity, the electromagnetic safety valve starts to open from this position, and at the time of pressing slightly before reaching full opening, 1779 g
Mm, and 1915 g · mm when held fully open (for example, at a rotation angle position of 250 °). After the pressure is released at this position, the pressure becomes 0 g · mm.

The relationship between the rotation angle of the instrument plug cam 9 and the cam torque is from 1402 to 1849 g · g from the start of opening of the instrument plug V by the cam surface 9a to the full opening (for example, a rotation angle range of 255 ° to 305 °). mm, but it was 404 g · mm at the time of holding at the subsequent combustion position.

The relationship between the rotational angles of the cam switches 11 and 12 and the cam torque is that the operating torque of the cam switches S1 and S2 by the cam surfaces 11a and 12a is 300 g.
mm.

From the above, faucets, electromagnetic safety valves, appliances
Regarding the rotational torque of the rotating cam required for opening and closing the stopper,
The required rotating torque for fire extinguishing and hot water suspension is 1591.4.
g · mm (= 587.4 + 404 + 300 + 300)
is there. This rotation torque can be opened during ignition or tapping.
It is small compared to any rotational torque of the rotating cam to be valved. Obedience
Therefore, the sliding resistance increases, the motor performance decreases, and the power decreases.
If any of the valves can be opened even if
Will be equipped with fire extinguishing and hot water stopping capabilities.
The safety of the vessel can be secured. Also, faucets, electromagnetic safety valves, vessels
Regarding the rotation angle of the rotating cam required for opening and closing the closure,
The required rotation angle when extinguishing and stopping the hot water is 32 ° (= 33
7 ゜ -305 ゜). This rotation angle depends on ignition and tapping
When opening one of the rotary cams,
Even small. Therefore, it is necessary to open any of the valves.
Be able to extinguish fires and stop hot water in less time than
Thus, the safety of the water heater can be ensured. In the above-described embodiment, the ignition device of the present invention is applied to the main water heater, but if the water faucet WV is removed, the ignition device can be easily applied to the first water heater.

[0047]

As described above in detail, the claims of the present invention are described below.
The igniter for a water heater described in 1 above uses a motor as a driving source to
Ignition and tapping within a range where the system rotates 360 ° in one direction
Since fire extinguishing and hot water stop are performed from the beginning, the structure is simplified,
Excellent effect of being compact and inexpensive to manufacture
Play a fruit.

Further , in the ignition device for a water heater according to the second aspect,
According to the first aspect, in addition to the effect of the first aspect, the shape of the cam increases.
The entire circumference of the cam can be used effectively because only the taper is used.
Since the climb taper angle is gentler, the load on the motor is
Significantly reduced. Therefore, power can be saved.
And allow the motor to have a margin for the load.
it can.

Further, according to the third aspect of the present invention, there is provided an ignition device for a water heater.
According to the present invention, in addition to the effect of claim 1 or 2, the sliding resistance
Increases, motor performance decreases, or power decreases.
Even if there is a fire extinguishing and hot water stopping ability, safety is improved.
Up.

Further , in the ignition device for a water heater according to the fourth aspect,
According to the present invention, in addition to the effects of claims 1 to 3, fire extinguishing and tapping
If you perform a stop operation, fire extinguishing and hot water can be stopped immediately.
The integrity is improved.

[Brief description of the drawings]

FIG. 1 is a rear view of only a cam box showing an embodiment of a water heater igniter according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along line YY of FIG. 1;

FIG. 4 is a sectional view taken along the line ZZ of FIG. 1;

FIG. 5 is a rear view of the rotary cam.

FIG. 6 is a side view of the cam for faucet.

FIG. 7 is a side view of the cam for the cam switch.

FIG. 8 is a side view of the instrument stopper cam.

FIG. 9 is a side view of the cam for the cam switch.

FIG. 10 is a side view of a cam for an electromagnetic safety valve.

FIG. 11 is an overall front view of a part cut.

FIG. 12 is a bottom view of the whole part of which is cut.

FIG. 13 is an overall side view showing a part cut.

FIG. 14 is an explanatory diagram showing a relationship between a rotation angle of a rotary cam and each valve operation.

FIG. 15 is an explanatory diagram showing a relationship between a rotation angle of a rotary cam and cam torque.

[Explanation of symbols]

 M Motor A Rotating cam WV Water tap MV Electromagnetic safety valve V Instrument tap

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-208615 (JP, A) JP-A-49-28477 (JP, A) JP-A-62-66055 (JP, A) 162262 (JP, U) Actually open 1987-83140 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/10 301 F23N 1/08 101 F23N 5/00

Claims (4)

(57) [Claims] 1. A water heater that drives a water faucet, an electromagnetic safety valve, an instrument plug, and the like at a different timing through a rotary cam using a motor as a drive source, in a range where the rotary cam rotates 360 ° in one direction. An igniter for a water heater, characterized in that it is configured to drive from tapping and tapping of a faucet, an electromagnetic safety valve, an instrument tap, etc. to extinguishing and stopping tapping. 2. An igniter for a water heater according to claim 1, wherein the shape of the taper of the rotary cam is a gentle upward taper. 3. The water tap, the electromagnetic safety valve, and the instrument tap.
From the rotating torque of the rotating cam required for each valve opening drive
The rotation torque of the rotating cam required to extinguish and stop hot water
3. The method according to claim 1, wherein the distance is set small.
On-board water heater ignition device. 4. The water tap, the electromagnetic safety valve, and the instrument tap.
Than the rotation angle of the rotating cam required for the individual valve opening drive of
Reduce the rotation angle of the rotating cam required to extinguish
4. The hot water heater according to claim 1, wherein
Device ignition device.