JPH0639966B2 - Gas supply control device for gas appliances - Google Patents

Description

Description: INDUSTRIAL APPLICABILITY The present invention is used for gas appliances such as a gas table, a gas oven, and the like, and controls supply and stop and flow of gas to a burner by an electronic control unit including a motor and a microcomputer. The present invention relates to a gas supply control device for controlling.

2. Description of the Related Art In a conventional gas appliance of this type, a gas table was manually controlled by rotating a gas cock to supply and stop the gas to a gas burner, and controlling the flow rate.

FIG. 7 shows the gas table. Gas burners 1 and 2 are provided on the left and right sides, and a grill portion 3 used for grilling fish is provided between them. Then, by operating the manual knobs 4, 5 and 6 provided on the front operation section to open and close the gas cock (not shown), the left gas burner 1, the grill section 3 and the right gas burner 2 are ignited, extinguished and the gas flow rate is adjusted. Was. 7 in the figure
Is a top plate, 8 is Gotoku, 9 is a grill door, 10 is its knob, and 11 is an exhaust hole of the grill part 3.

Problems to be Solved by the Invention In this conventional gas table, the knobs 4 to 6 are manually rotated to ignite and extinguish by opening and closing the cock, and the gas flow rate is adjusted depending on the degree of opening of the cock, so the operation is very complicated. And, controlling the firepower was difficult. Also, in terms of safety, although there is a raw gas leakage prevention device that uses a safety valve such as a solenoid valve, the tempura fire prevention device,
There was no automatic fire extinguisher or earthquake-proof device for forgetting to turn off after burning for a long time, and the main reason was that the gas cock was opened and closed manually.

Therefore, the present invention is to provide a gas supply control device for a gas appliance that allows various safety devices and the like to be easily incorporated and is easy to operate.

Means for Solving the Problems The present invention which solves the above problems, an electronic control unit that sends a signal for controlling the combustion unit, and a gas from the electronic control unit is operated by the signal from the electronic control unit. A gas control unit for controlling supply and a flow rate thereof, and connected to the electronic control unit,
And a plurality of keyboards for inputting control signals, the gas control unit is composed of a motor and a cock for driving the motor to open and close a gas passage and a gas flow rate control unit, and the electronic control unit is provided with the cock in the event of a power failure. It has a backup power supply to close.

Operation According to the above means, the keyboard is operated to ignite the combustion part,
When a control signal for extinguishing the fire and adjusting the thermal power is input, the electronic control unit operates according to the control signal to drive the gas control unit. That is, the motor rotates to turn the cock by a predetermined angle, and the gas flow rate is controlled by opening and closing the cock and rotating the gas flow rate control unit. Therefore, the gas control unit can be easily turned on by inputting various signals from the electronic control unit. Therefore, various control devices can be incorporated. Also, in the event of a power failure, the backup power supply backs up the electronic control unit to rotate the motor and close the cock of the gas control unit, which is safe.

Embodiment A gas table adopting an embodiment of the gas supply control device of the present invention will be described below with reference to FIGS. 1 to 6. Sixth
The figure shows a gas table which employs the gas supply control device of the present invention. Reference numeral 20 denotes an instrument body of a horizontally long gas table, in which left and right stoves 22 and 23 are arranged side by side on a top plate 21.
Reference numeral 24 denotes a grill portion such as a baking chamber which is located below the right stove 23 and is provided at the right end of the appliance body 20.
Door 2 with knob 25 for entering and exiting food in front of 0
6 is provided, and an exhaust hole 27 for combustion gas is opened in the top plate 21 at the rear side of the right stove 23. Reference numeral 28 denotes an operation panel provided at the left end of the instrument body 20 via the grill portion 24 and a heat insulating portion 29 having a predetermined width W. The operation panel 28 includes a microcomputer and the like for controlling a gas control unit (details will be described later) 30 for supplying and stopping gas to and from the gas burners of the left and right stoves 22, 23 and the grill unit 24. A plurality of keyboards for inputting control signals to an electronic control unit (details will be described later) 31 are provided. This keyboard is on the left and right stove 2
2, 23 and the grill part 24 are respectively fire extinguishing buttons 3
2, small heat power and ignition button 33, large heat power and ignition button 34
With a left stove 22 and a right stove 2 in order from top to bottom
It is provided on the operation panel 28 and for the grill section 24. Reference numerals 35a, 35b, and 35c denote combustion display lamps for the stove and the grill part, and the number of lights increases or decreases depending on the strength of the heating power. 36 is a cooking timer that doubles as a clock.

Next, the gas control unit 30 described above will be described in detail with reference to FIGS. This gas control unit has the same structure as each stove and grill unit, and will be described with an example. Three
7 is a cock body having a gas inlet 38 and a gas outlet 39,
Numeral 40 is a rotatably provided on the cock body 37, and has a gas passage 41 that connects the gas inlet 38 and the gas outlet 39. 42 is a motor whose rotation speed is lowered by a gear for rotating the closing member 40, which engages with the closing shaft 40b through a fitting hole 40a having a D-shaped cross section, is slidable in the axial direction, and rotates. It transmits power only in the direction. Reference numeral 43 denotes a gas flow rate control body of a rotatable circular plate provided in the cock body 37 between the downstream of the closure 40 and the gas outlet 39, and a connecting rod 45 is fixed to a D-shaped hole 44 provided at the center. At the same time, the upper end of the connecting rod 45 is connected to the closure 40 so as to be slidable in the axial direction according to the center line thereof and to transmit the force only in the rotational direction. Then, the gas flow rate controller 43 has a third
As shown in the figure, along with the arc-shaped gas passage hole 43a along the circumferential line P facing the gas outlet 39 of the cock body 37, the control holes 43b to 43g having different diameters are controlled to rotate the gas flow rate from large to small or vice versa. Is provided, the position of the gas passage hole 43a and the control holes 43b to 43g with respect to the gas outlet 39 is changed by changing the rotation angle, and the gas flow rate is controlled. Reference numeral 46 is a gas outlet structure closed at the bottom of the cock body 37, and 47 is a gas outlet structure 4.
6 is pressed against the gas flow rate control body 43, and the gas passage hole 43
a, a spring for preventing gas leakage from places other than the control holes 43b to 43g, 48 a spring for preventing floating of the closure 40, and 49 a rotation of the gas flow rate control body 43 and the closure 40 rotated by the motor 42. A control position detector that detects an angular position and notifies the electronic control unit 31 of the current collector plate 51 having a plurality of current collectors 50, a contact rail 52 with which each current collector 50 of the current collector plate 51 abuts, and a contact B _1. consisting contact plate 53 having up to .about.B _8. Then, the contact plate 53 is fixed to the cock body 37, and the current collector plate 51 is provided with only the force in the rotational direction transmitted to the closing shaft 40b and slidable in the axial direction so that its center line is aligned with the closing shaft 40b. is rotated together with the閉子40, further gas passage holes 43a of the gas flow rate control member 43, controlled pore 43b~43g contact _B 1 corresponds to ~B
₈ are provided. As shown in FIG. 4, the contact plate 53 is provided with contact rails 52 on the circumference of A'circumscribing around the center hole 54 and contacts B _{1 to} B ₈ on the circumference of B '. The current collector 50 rotates on the contact rail and on the contact.
Then, when the current collector 50 is located at the contact B ₁ , the closure 40
Is closed and becomes a gas stop, and when the current collector 50 is next positioned at the contact B ₂ , the closure 40 is rotated by 90 ° and opened, and the gas passage hole 43a of the gas flow rate control unit 43 corresponds to the gas outlet 39. shows the fully open state, the Likewise ranking contacts _B 3 .about.B ₈ following control hole of the gas flow control member 43 shown in FIG. 3 43b~4
It corresponds to 3 g. Therefore, since the contact rail 52 and the contacts B _{1 to} B ₈ are connected to the electronic control unit 31 via the lead wire 55, the rotation angle position of the gas control unit 30 (closer 40, gas flow rate control body 43) is set. will be shown, for example, when supplying the gas amount indicated by the contact points B _4, thermal large and the control signal pressing the ignition button 34 is rotated is inputted motor 42 to the electronic control unit 31 contacts the control panel 28 The amount of gas increases by increasing B ₃ by one step. 56 is a motor mounting plate mounted on the cock body 37, 57 is a spring for preventing the current collector plate 51 from floating, and 58 is a lead wire for connecting the motor 42 to the electronic control section 31. A nozzle 59 is connected to the gas outlet 39 of the cock body 37 and supplies gas to the grill or the stove burner 60. An igniter 61 is connected to the electronic control unit 31 and ignites the stove burner 60. Reference numeral 62 is a combustion detection sensor that sends a signal to the electronic control unit 31 to detect the combustion of the stove burner 60 and stop the spark of the igniter 61.

As the power source of the gas control unit 30 and the electronic control unit 31 uses a household AC power source, the motor 42 of the gas control unit 30 and the driving power source of the rotational position detector 49 are lost in the event of a power failure, and The electronic control unit 31 does not work and is in a non-controlled state, which is dangerous. Therefore, a backup power supply 63 and a power failure check circuit 64 shown in FIG. 5 are provided, and the backup power supply 63 drives the motor 42 to return the closure 40 from the open state to the closed state. That is, reference numeral 65 is a transformer for making AC100V a low voltage, and a DC power supply circuit including a rectifier 66, a smoothing resistor 67, and a capacitor 68 is connected to the secondary side. The backup power supply 63 is composed of a capacitor and is connected to the DC power supply circuit via a diode 69 for preventing backflow. Reference numeral 70 denotes a resistance for preventing overcurrent, which protects the diode 69. 71 and 72 are dividing resistors, which are connected in parallel to the backup power source 63. Reference numeral 73 denotes a comparator, which is connected to a terminal and a DC power supply circuit, the terminal of which is connected to a common point of the dividing resistors 71 and 72, and the output terminal of which is connected to the power failure check circuit 64 of the electronic control unit 31. During normal use, the DC power supply circuit supplies power to the motor 42, the electronic control unit 31, and the like. However, when a power failure occurs, the potential of the terminal of the comparator 73 becomes 0 V, while the backup power source 63
The terminal having the potential from
The output of will be reversed. Then, by transmitting this inverted output, the power failure check circuit 64 of the electronic control unit 31
Is regarded as a power failure and the backup power supply 63 drives the motor 42 to close the closure 40. A lead wire 74 connects the keyboard of the operation panel 28 to the electronic control unit 31.

In the above embodiment, when the ignition button 34, which is the keyboard of the operation panel 28, is pressed, a control signal is input to the electronic control unit 31. Then, from the electronic control unit 31 to the gas control unit 3
A signal is sent to 0, the motor 42 rotates, and at the same time the closure 4
0 and the gas flow rate control unit 43 work together. And the child 4
0 is opened, and the gas is aligned with the gas outlet 39 of the gas flow controller 43, the gas passage hole 43 which is the hole at that time.
a or the control holes 43b to 43g and the nozzle 59 to the gas burner 60 (in this case, the left stove 2).
2) and is ignited and burned by the spark of the igniter 61 which is operated by a signal from the electronic control unit 31. Then, when it is desired to adjust the thermal power, for example, the one that was pushed first was the large thermal power / ignition button 34, so when the small thermal power / ignition button 33 is pressed, a control signal is input to the electronic control unit 31, while The rotation angle of the gas flow rate control body 43 up to now is detected by the rotation position detector 49, and the electronic control unit 3
However, since the position detection is different from the position where the heat power is reduced, the electronic control unit 31 that confirms this position sends a signal to the motor 42 so that the gas flow rate control body 43 has a predetermined angle to reduce the heat power. As the motor rotates, the motor 42 rotates through the closure 40 to adjust the heat power to a small level. Of course, if the gas flow rate control body 43 rotates to a predetermined position, the power supply to the motor 42 stops. Further, at this time, the number of the combustion indicating lamps 35a becomes smaller than the strong thermal power, so that the number of lighting is reduced.

Furthermore, when extinguishing the gas burner 60, the fire extinguishing button 32
If is pressed, the electronic control unit 31, the motor 42 are operated in the same manner as described above.
And the signals of the positions of the gas flow rate control body 43 and the closure 40 from the rotational position detector 49 are transmitted to the electronic control unit 3.
1, the electronic control unit 31 rotates the motor 42 and closes the closure 40.

Although only ignition, fire extinguishing, and thermal power adjustment are performed in the description of the above embodiment, since the gas flow rate is all opened, closed, and regulated electrically as described above, the temperature of the pot bottom placed on the stove is detected as necessary. It is also possible to provide a sensor 75 for detecting the completion of cooking, detect an abnormally high temperature, send a signal for preventing tempura fire to the electronic control unit 31, and rotate the motor 42 to close the closure 40.

As described above, in the embodiment, since the opening and closing of the gas cock and the thermal power adjustment which were conventionally performed manually are automated by the combination of the electronic control unit, the motor, the cock, and the gas flow rate control unit, the combination of various safety devices can be achieved simply by adding a sensor or the like. Can be done easily.

Also, unlike the general valve system, the gas supply and stop is a cock system, so the safety of gas shutoff is high.

Furthermore, since the motor 42, the closure 40, and the gas flow rate control unit are set on the same axis and are connected so as to transmit the force only in the rotational direction, the number of parts is small, the reliability is high, and the cost is low. it can.

Furthermore, the gas flow rate control is convenient because the flow rate change can be arbitrarily obtained by opening a necessary number of control holes of the gas flow rate control body 43.

Furthermore, when the gas control unit 30 is controlled, it is sufficient to rotate the motor 42 only at that time, and since there is no use of electric power at other times, it is energy saving as compared with the control of gas supply using a solenoid valve.

As described above, the present invention includes an electronic control unit that sends a signal for controlling the combustion unit, and a gas control unit that operates by a signal from the electronic control unit and controls the gas supply to the combustion unit and the flow rate thereof. A plurality of keyboards connected to the electronic control unit and for inputting control signals, the gas control unit includes a motor, a cock driven by the motor to open and close a gas passage, and a gas flow rate control unit, The electronic control unit has a backup power supply that closes the cock in the event of a power failure, and has the following effects.

(1) Since the motor is controlled by the electric signal to control the gas control unit, various control devices such as a safety device can be easily incorporated.

(2) Further, since the cock of the gas control unit and the gas flow rate control body are controlled by the rotation of the motor, the cock can be opened and closed surely and safely, and an arbitrary flow rate change can be easily obtained.

(3) Electric power is required when the motor rotates, so energy can be saved compared with gas control using a solenoid valve.

(4) It is safe because the backup power supply works and the cock can be closed even during a power failure.

[Brief description of drawings]

FIG. 1 is a block diagram of a gas supply control device according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a gas control unit, which is a main part thereof, and FIG. 3 is a plan view of the gas flow rate control body. 4 is a front view of the contact plate, FIG. 5 is a power supply circuit diagram including the backup power supply circuit, FIG. 6 is a perspective view of a gas table adopting the gas supply control device of the present invention, and FIG. 7 is a conventional example. FIG. 3 is a perspective view of a gas table adopting the gas supply control device of FIG. 30 ... Gas control unit, 31 ... Electronic control unit, 32 ... Keyboard, 37 ... Cock, 42 ... Motor, 43 ...
Gas flow controller, 63 ... Backup power supply, 49 ...
Control position detector.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Soga 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References

Claims (1)

[Claims] 1. An electronic control unit which sends a signal for controlling a combustion unit, a gas control unit which operates by a signal from the electronic control unit and controls a gas supply to the combustion unit and a flow rate thereof, and the electronic control unit. And a plurality of keyboards for inputting control signals, the gas control unit includes a motor, a cock driven by the motor to open and close a gas passage, and a gas flow rate control unit, and the electronic control unit is A gas supply control device for a gas appliance having a backup power supply for closing the cock in the event of a power failure.