JPS6119319Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for supplying gas fuel to gas combustion appliances such as table stoves.
More specifically, the present invention relates to a device in which the supply flow rate of gas fuel is switched in stages.

When cooking using a table stove or the like, it may be desirable to use high heat for an initial predetermined period of time, and then cook over low heat.

Typical prior art is, for example, Utility Model Application No. 53-
76342, directing the gas fuel from Kotoku to the gas combustion appliance through a flow control valve,
A bypass pipe is connected in parallel to this flow rate control valve, and a solenoid valve is interposed in the bypass pipe. At the beginning of combustion, the solenoid valve is opened, and not only gas fuel via the flow control valve but also gas fuel via the bypass pipe is supplied to the gas combustion appliance.
This allows you to cook over high heat.
By closing the solenoid valve, the heat can be kept low thereafter.

In such prior art, it is not possible to set the time for the fire to reach high heat, and after the fire reaches low heat, the low heat combustion state continues unless the pot is closed. Therefore, during cooking, the cook must monitor the operation of the cooker and solenoid valve. Therefore, it is desirable to automatically perform cooking.

In addition, with such prior art, the flame tends to blow out, especially when cooking over low heat, and when this happens, the gaseous fuel is ejected without being combusted, which is dangerous. When burning with high flame, blowout is unlikely to occur even if the opening of the flow control valve is small, but when the solenoid valve is closed and the bypass pipe is cut off, if the opening of the flow control valve is too small. The flame is easily extinguished and gaseous fuel is ejected.

The purpose of this invention is to enable high heat and low heat to be heated for a predetermined period of time, and to automatically cut off the gas fuel supply after such heating is completed, thereby enabling automatic cooking, etc. The present invention provides a fuel supply device for gas combustion appliances that enables heating.

Another purpose of the present invention is to immediately cut off the gas fuel supply when the flame of a gas combustion appliance blows out during low-heat heating, etc., so that the gas fuel is ejected without being combusted. It is an object of the present invention to provide a fuel supply device that prevents this and improves safety.

In the present invention, two branch channels 3 and 4 are interposed in the middle of a main channel 2 that guides gas fuel from a gas fuel supply source to a gas combustion appliance, and corresponding ends of each of these branch channels 3 and 4 are provided. The sections are commonly connected to the upstream and downstream sides of the main flow path 2, and one branch flow path 3 is provided with a flow control valve 26, and the other branch flow path 3 is provided with a flow control valve 26. An on-off valve 5 is interposed in the other branch flow path 4, and this on-off valve 5 includes a first valve body 7 disposed on the upstream side of the gas fuel in the casing 6, and a first valve body 7 located on the upstream side of the gas fuel. a first valve seat 8; a first spring 9 that resiliently biases the first valve body 7 toward the first valve seat 8 from the opposite side to the first valve seat 8; A valve stem 10 is fixed to a valve stem 7 and extends through a first valve seat 8. First and second time limiting means 11, 36 are provided in relation to the on-off valve 5, and the first time limiting means is attached to the valve stem. A cam 13 is fixed to the first knob 12 and the other end of the valve stem 10 serves as a follower. During the time limit corresponding to the amount of displacement, the cam 13 returns to its original position and undergoes an angular displacement as time passes, and only during the time limit, the cam 13 moves the valve stem 10 so that the first valve body 7 The first valve body 7 is displaced against the spring force of the first spring 9 so as to be spaced apart from the first valve seat 8, and after the time limit, the first valve body 7 is moved to the first valve seat 8 by the cam 13.
Seated by the spring force of the spring 9, the second time limit means 3
6 has a larger outer diameter than the first knob 12,
The switch includes a second knob 38 that is disposed coaxially with the first knob 12 and behind the first knob 12 and can be angularly displaced; As the knob 38 returns to its original position, it undergoes an angular displacement as time passes, and the switch remains conductive only during the time limit, and after the time limit, the switch shuts off and the first and second knobs 12, 38 The rest positions of the main flow paths 2 and 4 are the same, and a main valve 15 is inserted upstream of the branch flow paths 3 and 4 of the main flow path 2, and this main valve 15 is connected to the housing 18.
, a third knob 16, and a closing member 17 that rotates in the housing 18 integrally with the third knob 16, and by rotation of the closing member 17, opening and closing operations of the main channel 2 are achieved in a locking manner. , downstream of the main flow path 2 from the closure 17, a second valve seat 19 facing the downstream side is located within the housing 18 that houses the closure 17.
, a second valve body 20 that can be seated on the second valve seat 19 on the downstream side;
A second spring 21 is provided to elastically bias the valve seat 19, and the housing 18 further includes a high magnetic permeability material 22 fixed to the first valve body 20, and a magnetic material 22 attached to the high magnetic permeability material 22. In connection with this, an electromagnet 23 is provided which is disposed on the opposite side of the second valve seat 19 with respect to the second valve body 20, and the electromotive force from the thermocouple 24 heated by the combustion heat of the gas combustion appliance is is applied to the electromagnet 23 via the switch 37, thereby causing the high magnetic permeability material 22 and the second valve body 20 to
A fourth knob 25 is provided which is displaced in a direction away from the second valve seat 19 against the spring force of the spring 21 and is movable angularly coaxially with the third knob.
is a fuel supply device for a gas combustion appliance characterized in that the fuel supply device is interlocked to adjust the opening degree of the flow rate control valve 26.

FIG. 1 is a sectional view of an embodiment of the present invention. The illustrated structure is built into a table stove. A main channel 2 that leads gaseous fuel to the burner 1 from a gas supply source (not shown) is interposed with branch channels 3 and 4 that are branched into two. These branch channels 3,
Corresponding ends of 4 are commonly connected to the upstream and downstream sides of the main flow path 2 . A flow rate control valve 26 is interposed in one branch flow path 3 .

An on-off valve 5 is inserted in the middle of the other branch flow path 4. The on-off valve 5 includes a first valve body 7 disposed on the upstream side of the gas fuel in the housing 6, and a first valve body 7 facing the upstream side. a valve seat 8 and a first spring 9 that resiliently urges the first valve body 7 toward the first valve seat 8
and a valve stem 10 fixed to the first valve body 7.
The valve stem 10 projects outwardly from the housing 6 on the side opposite to the first spring 9 .

The valve stem 10 is associated with a first timing means 11 . This first time limit means 11 has a first knob 12 . When the first knob 12 is rotated angularly by manual operation, the cam 13 integrally fixed to the first knob 12 rotates in the opposite direction at an angle directly proportional to the passage of time. The valve rod 10, which acts as a follower, is in sliding contact with the cam 13. After the preset time limit has elapsed, the cam 13 causes the first valve body 7 to seat the valve stem 10 acting as a follower on the first valve seat 8 by the elastic force of the first spring 9. Work like you do. During the set time limit, the cam 13 moves the valve stem 10 and therefore the first valve body 7 away from the first valve seat 8 against the elastic force of the first spring 9. Work like you do. In other words, by setting the time limit using the first knob 12, only during the time limit,
The on-off valve 5 remains open. The first knob 12 is
It can be angularly displaced about the same axis as the valve stem 10.

Another second time limit means 3 to the first time limit means 11
A timer switch 37 of the second time limit means 36 is electrically connected during the time limit period and is inserted in series between the electromagnet 23 of the main valve 15 and the thermocouple 24. . Second time limit means 36
The second knob 38 and the first knob 12 are provided so as to be rotatable in rotational angle. The second knob 38 has a larger outer diameter than the first knob 12, is arranged coaxially with the first knob 12 and behind the first knob 12 (above in FIG. 1, behind in FIG. 2), and is located at a corner. Displaceable. first and second knobs 12,
The rest positions indicating time "0" of 38 coincide as shown in FIG. 6, which will be described later.

A main valve 15 is inserted upstream of the branch channels 3 and 4 of the main channel 2 . The main valve 15 includes a third knob 16 and a closure 17 that rotates integrally with the third knob 16 within the housing 18, and the rotation of the closure 17 opens and closes the main flow path 2 in a locking manner. Downstream of the main flow path 2 from the closure 17, within the housing 18 that houses the closure 17, there is a second valve seat 19 facing the downstream side, and the second valve seat 19 can be seated on the downstream side. A second valve body 20 and a second spring 21 that biases the second valve body 20 toward the second valve seat 19 are provided.

A high magnetic permeability material 22 is fixed to this second valve body 20 . An electromagnet 23 magnetically associated with the high permeability material 22 is connected to the second valve body 20 and the second valve seat 19.
It is located downstream. The electromagnet 23 is excited by a thermocouple 24 that generates an electromotive force by the combustion heat of the burner 1. When igniting, the second valve body 2
0 is spaced apart from the second valve seat 19 in a conventional manner. Another fourth knob 25 is provided coaxially with the third knob 16 and is rotatable independently of the third knob 16.
By changing the rotation angle, the opening degree of the flow rate control valve 26 provided in the branch flow path 3 can be adjusted.

When the third knob 16 is operated to open the valve with the closure 17, the fourth knob 25 opens the flow control valve 2.
6. The opening degree (and therefore the input) is configured to be interlocked so that the opening degree (therefore, the input) is maximized. In other words, the input is always at its maximum at the time of ignition. This is to prevent backfire and ignition errors during ignition, and to simplify the operation of the table stove when the first time limit means 11 is not in use.

In operation, first, turn the second knob 38 as shown in the second figure to set the time limit to 30 minutes by the second time limit means 36, and then turn the first knob 12 to set the time limit to 30 minutes by the first time limit means 11. Assume that the time is set to 20 minutes. Then, the fourth knob 25 is used to set a predetermined input. So main valve 1
5, the third knob 16 is operated to angularly displace the closing member 17, and the second valve body 20 is separated from the second valve seat 19 to open the valve. Therefore, the gas fuel from the gas supply source is transferred to the main flow path 2 and the upstream main valve 15.
From there, the burner 1 is connected from the main flow path 2 on the downstream side via the branch flow path 3, the on-off valve 15, and the branch flow path 4.
supplied to Therefore, the input is relatively large due to the flow rate of gas fuel supplied to the burner 1, and during combustion in the burner 1, the electromotive force generated by the thermocouple 24 passes through the switch 37 and is generated by the electromagnet 23.
is excited to attract the high magnetic permeability material 22 integral with the second valve body 20 against the spring force of the second spring 21,
The second valve body 20 remains separated from the second valve seat 19.

The state in which the 20 minute time limit in the first time limit means 11 has been completed is shown in FIGS. 3 and 4,
The first knob 12 has returned to its rest position. The on-off valve 5 is brought into a closed state by the action of the first time limit means 11, and the input of the burner 1 is switched to a small value.
That is, the first valve body 7 of the on-off valve 5 is seated on the first valve seat 8 by the spring force of the first spring 9, and the branch flow path 4 is closed. Therefore, the gas fuel passing through the main valve 15 is supplied from the branch flow path 3 to the burner 1 at a flow rate corresponding to the opening degree of the flow control valve 26 . In this case, the gas fuel supply flow rate of the burner 1 and hence the input are relatively small. In this way, the input is large during the time limit by the first time limit means 11, and after the time limit is completed, the input is controlled to be small.

When a further period of time elapses and the 30 minute time limit set by the second time limit means 36 is completed, the state shown in FIGS. 5 and 6 is reached, and the second knob 38 is returned to the rest position. The timer switch 37 is shut off, the electromagnet 23 is demagnetized, the second valve body 20 provided in the main valve 15 is seated on the second valve seat 19, and the valve is closed, cutting off the supply of gas fuel. To summarize, after gas fuel is supplied by operating the fourth knob 16 of the main valve 15, the supply amount of gas fuel decreases after the time limit set by the first time limit means 11 has elapsed, and then After the time limit set by the second time limit means 36 is completed, the fuel supply is cut off.

Note that when gas fuel is supplied to the burner 1, if the fire is extinguished by blowing out or the like, the thermocouple 24 will no longer generate its electromotive force. Therefore, the high magnetic permeability material 2 by the electromagnet 23
2 is released, and the second valve body 20 is connected to the second spring 2.
The valve is seated on the second valve seat 19 by the spring force of 1, and the valve is closed, thereby maintaining safety.

In the embodiments described above, the battery 34 may be a dry battery or a storage battery, but at a sufficiently low voltage, e.g., less than 3 volts, so as to prevent an explosion of the gaseous fuel due to the generation of a spark or the like. It is preferable that the degree of

As described above, according to the present invention, the first time limit means 1
1 sets the time for the high flame state, and after the high fire state ends, the second time limit means 36
The low flame state continues until the time set by , after which the switch is shut off, the electromagnet 23 in the main valve 15 is demagnetized, and the gas supply is cut off. In this way, cooking etc. can be performed automatically.

Furthermore, when the flame is blown out during use of a gas combustion appliance, especially in a low flame state, the supply of gas fuel is immediately cut off regardless of the time limit. This improves safety. Therefore, the opening degree of the flow rate control valve 26 is erroneously set too small in the state of high flame, and then the opening degree of the on-off valve 5 is
It is safe to extinguish the fire as soon as it closes and the flame is low.

The first knob 12 and the second knob 38 are coaxially provided so as to be able to be angularly displaced with respect to each other, and the rest positions of these knobs 12 and 38 coincide as shown in FIG. 6 described above. Therefore, the first knob 1
2 and the second knob 38 (that is, the time required to maintain the low heat state) can be clearly seen. The outer diameter of the second knob 38 is the same as that of the first knob 1.
2, and the second knob 38 is located behind the first knob 12. Therefore, the first knob 1
2 and the second knob 38, the small diameter first knob 12 is used to set a shorter time than the larger diameter second knob 38, which makes it easier for cooks etc. can be easily identified visually. Therefore, it is possible to avoid an operational error in which the time set by the first knob 12 becomes longer than the time set by the second knob 38.

According to the present invention, since the third knob 16 and the fourth knob 25 are provided on the same axis, the third knob 16 must be operated to open the main valve 15 by operating the closure 17. Then, in order to adjust the degree of high heat, the fourth knob 25 can be operated successively, thus improving the operability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 shows the time limit means 11, 36 in the operating state shown in the first diagram.
3 is a sectional view showing the embodiment shown in the first figure in different operating states, and FIG. 4 is a front view of the knobs 12, 38 in the operating state shown in the third figure.
FIG. 5 is a sectional view showing a further different operating state of the embodiment shown in FIG. 1, and FIG. 6 is a front view of the knobs 12, 38 in the operating state shown in FIG. DESCRIPTION OF SYMBOLS 1... Burner, 2... Main flow path, 3, 4... Branch flow path, 5... Open/close valve, 7... First valve body, 8... First valve seat, 9... First spring, 11 ...First time limit means, 12...First knob, 15...Main valve, 16...
...Third knob, 17...Closer, 18...Housing, 19...Second valve seat, 20...Second valve body, 21
...Second spring, 22...High magnetic permeability material, 23...
Electromagnet, 24... thermocouple, 25... fourth knob,
36...Second time limit means, 37...Switch, 38
...Second knob.

Claims (1)

[Claims for Utility Model Registration] Two branch channels 3 and 4 are provided in the middle of the main channel 2 that guides gas fuel from a gas fuel supply source to a gas combustion appliance.
The corresponding ends of these branch channels 3 and 4 are commonly communicated with the upstream and downstream sides of the main channel 2, and one branch channel 3 has a flow rate control A valve 26 is interposed, and an on-off valve 5 is interposed on the other branch flow path 4, and this on-off valve 5 includes: a first valve body 7 disposed on the upstream side of the gas fuel;
A first valve seat 8 facing the upstream side, and a first spring 9 that elastically biases the first valve body 7 toward the first valve seat 8 from the opposite side to the first valve seat 8.
and a valve stem 10 whose one end is fixed to the first valve body 7 and which extends through the first valve seat 8, and includes first and second time-limiting means 1 in relation to the on-off valve 5.
1 and 36, and the first time-limiting means includes a first knob 12 that is angularly displaced around the same axis as the valve stem 10, and a first knob 12 that is fixed to the first knob 12, and the other end of the valve stem 10 is connected to a follower. During a time limit corresponding to the amount of angular displacement of the first knob 12, the cam 13 returns to its original position and is angularly displaced as time passes; The cam 13 displaces the valve stem 10 against the spring force of the first spring 9 so that the first valve body 7 is spaced apart from the first valve seat 8, and after a time limit, the cam 13 displaces the valve stem 10 so that the first valve body 7 is separated from the first valve seat 8. The valve body 7 is seated on the first valve seat 8 by the spring force of the first spring 9, and the second timer means 36 has an outer diameter larger than the first knob 12, and
A second knob 38 is disposed coaxially with the knob 12 behind the first knob 12 and can be angularly displaced; moves toward its original position and undergoes an angular displacement as time passes, and the switch remains conductive only during that time limit. After the time limit, the switch shuts off and the first and second knobs 12, 38 are stopped. The positions match, and a main valve 15 is inserted upstream of the branch channels 3 and 4 of the main channel 2, and this main valve 15 is connected to the housing 18, the third knob 16, and the third knob. 16 and a closing member 17 that rotates in the housing 18 integrally with the closing member 16, the rotation of the closing member 17 achieves the opening/closing operation of the main channel 2 in a locking manner, and the main channel 2 is located downstream of the closing member 17. So, Shuko 17
A second valve seat 19 facing the downstream side; a second valve body 20 that can be seated on the second valve seat 19 on the downstream side; A second spring 21 is provided to elastically bias the valve seat 19, and the housing 18 further includes a high magnetic permeability material 22 fixed to the second valve body 20.
and an electromagnet 23 magnetically associated with the high permeability material 22 and arranged on the opposite side of the second valve seat 19 with respect to the second valve body 20, the electromagnet 23 being heated by the combustion heat of the gas combustion appliance. The electromotive force from the thermocouple 24 is applied to the electromagnet 23 via the switch 37, thereby causing the high magnetic permeability material 2
2 and the second valve body 20 are displaced in a direction away from the second valve seat 19 against the spring force of the second spring 21, and a fourth knob 2 that can be angularly displaced coaxially with the third knob
5, and the fourth knob 25 is interlocked to adjust the opening degree of the flow rate control valve 26.