JP3076964B2 - Gas appliance ignition display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition display for a gas appliance in which an ignition device is operated by operating an operation button to ignite a gas burner.

[0002]

2. Description of the Related Art When an operation button is operated to an ignition position, an ignition device is operated to ignite a gas burner. Kaihei 3-130124
No. proposed. In this apparatus, as shown in FIG. 1, a stove operating device (13) (14) corresponding to a stove (1a) (1a) arranged on the left and right of a table stove top (1), An operating device (15) for grille is disposed on a front plate (11) of a body (10), and is attached to the front plate (11) such that an operation portion of an operation button of the operating device is exposed. The operation button is opposed to a spindle of an opening / closing mechanism of a valve device incorporated in the body. The operation button has a configuration in which a lower portion thereof is pivotally supported so as to be able to swing back and forth about a fulcrum at an upper portion thereof.

[0003] Accordingly, the gas valve corresponding to this is opened by the pushing operation of the operating section, and the gas circuit to the gas burner communicates, and at the same time, the ignition device (not shown) operates to ignite the gas burner. Then, by depressing the operation unit again, the operation unit returns to the initial position, the gas valve is closed, and the gas burner is extinguished.

[0004] In particular, in this prior art, as shown in FIGS. 2 and 3, a transparent cover portion is provided on the operation portion of each operation button (2) of the operation devices (13), (14) and (15). A window (21) is provided, and a roller type display (22) is provided on the back of the window (21). The display unit (22) causes the operation unit to open the gas valve by the action of a mechanism interposed between the display unit (22) and a support frame (23) that rotatably supports the operation button (2). The display body (22)
Since the portion that can be seen through the window (21) changes to a colored portion (A) (for example, red), it can be determined from the front of the appliance that the push button (2) is in the operating state.

However, this prior art display device only displays whether or not the operation button has been operated to the ignition position, and cannot determine whether or not the gas burner has been ignited by the display device. Therefore, in order to solve this inconvenience, it is conceivable that the display device is a display unit which is brought into a display state in response to an output when a flame detection device employed in this type of gas appliance detects a flame. Can be

In the case of a gas appliance employing the display means,
When the ignition device is operated and the gas burner is ignited by the operation of the operation button, the display means is displayed when the flame detection device detects the flame, and when the flame detection device does not detect the flame, the display is displayed. Since the means is not in the display state, it can be determined whether or not the gas burner has been ignited based on whether or not the display means is in the display state.

[0007]

However, in such an ignition display device, there is a time lag from when the operation button is operated to the ignition position to when the display means enters the display state. This is because a certain period of time is required until the ignition device operates to ignite the gas burner and the flame detection device detects a flame formed in the gas burner.

Accordingly, there is a disadvantage that the ignition display device does not enter the display state even though the operation button is operated to the ignition position and the gas burner is ignited. The invention of claim 1 solves such a disadvantage.
The fact that the operation button has been operated to the ignition position and that the gas burner has been ignited by the operation can be displayed by the common display means, and when the flame of the gas burner is extinguished, this can be displayed by the display means. Is the task.

A fourth object of the present invention is to make it possible to automatically shut off a gas circuit when a gas burner is not ignited or when a gas burner burns out.

[0010]

Means for Solving the Problems To solve the above-mentioned problems, the solution of the invention of claim 1 is that an ignition device for igniting a gas burner by operating an operation button to an ignition position,
A flame detection device for detecting presence / absence of flame of the gas burner, and a gas appliance including a display means, wherein the display means is set to a display state in response to an operation of the operation button to an ignition position, and the operation is performed. Display control means for setting the display means in a display state in response to a detection output of the presence of a flame of the flame detection device later, and setting the display means in a non-display state in response to a detection output of no flame. " It is.

In this case, when the operation button is operated to the ignition position, the gas burner is ignited by the ignition device, and at the same time, the display means is brought into a display state by the operation of the display control means. Thus, it can be determined that the operation button has been operated. When the flame formed in the gas burner is detected by the flame detection device and the flame detection device generates a detection output indicating that a flame is present, the display means is maintained in a display state by the operation of the display control means. When the gas burner is not ignited by the operation of the ignition device, or when the flame of the gas burner is extinguished after ignition, the flame detection device generates a detection output without flame, and the display control means operates by the operation of the display control means. The display means is in a non-display state.

[0012] The flame detection device may include a thermocouple circuit that generates a thermoelectromotive force in accordance with a heating temperature of a thermosensitive portion heated by a flame formed in the gas burner. When the thermoelectromotive force reaches a set value, a detection output indicating presence of a flame is generated, and conversely, when the thermoelectromotive force does not reach the set value, a detection output without a flame is generated.

[0013] The display means may be configured as "a part provided on the operation button".
It may be. In this case, it can be more clearly determined by the display means that the operation button has been operated to the ignition position. In the invention of claim 2 or claim 3, as in the invention of claim 4, "the display control means displays the display means for a set time in response to the operation of the operation button to the ignition position. Including a timer to perform, the set time is set longer than the required time until the flame detection device outputs a detection output of the presence of flame when the gas burner is ignited after the operation of the operation button to the ignition position, An excitation coil of an electromagnetic valve inserted into the gas circuit to the gas burner is inserted into the thermocouple circuit, and the valve body of the electromagnetic valve is forcibly opened by operating the operation button to the ignition position, and the excitation coil is disconnected. The valve is configured to automatically close in a conductive state, and a means is provided for supplying power to the exciting coil for a set time of the timer, which is different from the thermoelectromotive force of the thermocouple circuit. When the flame detector does not detect a flame, the gas circuit to the gas burner is automatically shut off, and the ignition of the operation button is performed. Since the solenoid valve is forcibly kept open until the flame detection device generates a flame detection output after being ignited by the operation to the position, until the flame detection device generates a flame detection output. There is no need to keep pressing the operation button, and operability is improved.

In the case where the gas burner is ignited by the ignition operation of the operation button, the display means is maintained in the display state by the output of the timer until the flame detection output is generated by the flame detection device. .

[0015]

According to the first aspect of the present invention, the fact that the operation button has been operated to the ignition position and that the gas burner has been ignited by the operation can be displayed by the common display means, and the flame of the gas burner is extinguished. If so, this can be displayed by the display means. Further, it is possible to eliminate the inconvenience that the display means does not enter the display state even though the operation button is at the ignition position and the gas burner is in the ignition state.

According to the invention of claim 3, the display means is easy to see. According to the invention of claim 4, when the flame of the gas burner is extinguished, the gas circuit to the gas burner is automatically shut off, so that it is safe. Further, it is not necessary to keep pressing the operation button until the flame detection device generates a detection output indicating presence of a flame, so that operability is improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiments shown in FIG. 4 et seq., The above-mentioned ignition display device is employed in a table stove operating device as shown in FIG. Only one operating device will be described in detail. Other operating devices have the same configuration. As shown in FIG. 4 and FIG. 5, this operating device includes a support frame (23) attached to a front plate (11).
It has an operation button (2) supported by. The operation buttons (2) are, as shown in the figure,
(26) are shaft holes (23b) in the left and right side walls (23a) of the support frame (23).
Penetrates rotatably. Therefore, the operation button (2) is provided to be able to rotate back and forth.

The operation button (2) has a configuration in which a lower half thereof swells forward, and the swelling portion serves as an operation portion (20). At a predetermined position on the front surface of the operation unit (20), a window (21) made of a transparent plate is formed. Further, on the back of the upper side and the lower side of the bulging portion, mounting tongue pieces (25) (25) for mounting a valve presser fitting (5) with which a spindle (57) of a valve opening / closing mechanism (56) abuts are formed. Have been. A light-emitting unit (31) as the display means described above is arranged on the bulging portion on the back of the window (21), and a front surface (B) of the light-emitting unit (31) faces the window (21). It is designed to be close.

As shown in FIGS. 6 and 9, the light emitting unit (31) is a rectangular plate-shaped substrate provided with an electric cord (32).
The substrate (30) is mounted so as to protrude from the front surface of the substrate (30), and the substrate (30) is mounted on a substrate holder (400) shown in FIGS. The substrate holder (400)
Is a rectangular frame that is longer to the left and right than the substrate (30), and a pair of locking pieces (41) (41) protrude forward from the upper side and the lower side, respectively, of the front surface. Each of the locking pieces (41) has an engaging projection (411) protruding inward. In addition, the substrate
In (30), four corners are cut out in a rectangular shape, and the substrate (30) is fitted into the cutouts (33) (33) so as to match the locking pieces (41) (41). It is. Then, in the left, right, up and down directions, the positioning is made by the notch (33) and the locking piece (41), and in the direction perpendicular to the mounting plane of the substrate holder (400), the peripheral edge of the substrate (30) Part and the engagement protrusion (411)
And is fixed in the retaining state by the engagement with.

In this mounting state, the board holder (4
The electric cord (32) extends in the longitudinal direction of (00).
At the end of the electric cord (32), a male connector (34) is attached. The substrate (30) and the substrate holder (400)
In the unit, mounting shafts (42) (42) protruding from the left and right side walls of the substrate holder (400) are provided with shaft holes (2a) provided in the left and right side walls (2a) (2a) of the operation button (2). ₁ ) (2a ₁ ) and attached to the operation button (2) as shown in FIGS.

An electric cord (32) is connected to the substrate (30). The electric cord (32) is connected to the substrate holder (40).
0) is inserted into the back through a cord hole (45) provided on one side and pulled out to the side of the operation button (2) as shown in FIG. In order to allow insertion of the connector-equipped cord, the cord hole (45) needs to be an opening large enough to allow the male member (34) to be inserted. The electric cord is connected to a control circuit.

The substrate holder (400) has a pair of extension pieces (43) (43) projecting upward from the upper side thereof and attached to the operation button (2) by the attachment shafts (42) (42). Sometimes, the tip of the extension piece (43) comes into contact with the mounting tongue piece (25) from behind. Also, a back recess (44) is formed on the back of the substrate holder (400). This back recess (44)
Is set to be larger than the width of the valve holding member (5). The valve retainer (5) includes side wall pieces (51) (51) protruding forward on both left and right sides, an upper side plate (52) from the upper side thereof, and a lower side plate (53) from the lower side thereof forward. It is protruding. Then, with the front edge of the side wall pieces (51) and (51) abutting against the bottom of the back recess (44), the valve presser fitting (5)
Of the mounting tongue pieces (25), (25) comes into contact with the rear ends of the mounting tongue pieces (25), (25). In this state, the upper side plate (52) is along the upper surface of the upper mounting tongue (25), and the lower side plate (53) is on the lower mounting tongue (2).
It fits on the lower surface of 5).

The upper side plate (52) and the lower side plate (53) have engaging holes.
(54) is formed, and the engaging projections (27) (27) provided at predetermined positions of the mounting tongue pieces (25) (25) are fitted into the mounting tongue pieces (25) (25), so that the valve presser fitting (5) is prevented from being pulled out. Will be retained. Then, the back surface of the substrate holder (400) (the bottom surface portion of the back concave portion (44)) comes into contact with the valve holding member (5) held by the operation button (2) in the entire vertical direction. The mounting posture of the board holder (400) on the operation button (2) is fixed.

The electric cord (3) connected to the substrate (30)
2) is led out through the code hole (45) of the substrate holder (400) and is drawn to the side as shown in FIG. In addition,
FIG. 5 shows an example in which the electric cord (32) is pulled out to the side of the operation button (2), but the electric cord (32) is drawn out above the line connecting the fulcrum shafts (26) and (26). In any case, the resistance of the electric cord is less likely to occur than when the cable is pulled backward. Preferably, as shown in FIG.
The electric cord (32) may be pulled out from the fulcrum shaft (26). Alternatively, the fulcrum shaft 26 may be drawn rearward from a line connecting the fulcrum shafts 26 or 26 or in the vicinity thereof. In these cases, the resistance of the electric cord (32) hardly occurs when the operation button (2) is turned.

In the case of FIG. 11, a C-shaped cord holding piece (28) as a whole is attached to the side of the side wall (2a) of the operation button (2) as shown in FIG. )
, The position of the cord drawer is fixed, and the operability is improved. While
This cord holding piece can be adopted in other embodiments. Further, it goes without saying that the method of drawing out the electric cord (32) can also be drawn out without passing through the cord hole (45).

In the above-described substrate holder (400), the mounting shafts (42) and (42) are inserted into the shaft holes of the side walls (2a) and (2a) of the operation button (2). The operation button having the shaft hole is configured in the same manner as the above-described operation button of the prior art, and is diverted as an operation device configured to rotate the display (22) in conjunction with the pressing operation of the operation button (2). A known fulcrum shaft of the display body (22) is inserted and held in the shaft hole, and a known interlocking mechanism is interposed between the support hole and the support frame (23). It functions in the same manner as the prior art described above. Thus, the display (2
The shaft hole as the bearing hole of the fulcrum shaft of 2) also functions as a bearing shaft hole of the mounting shaft (42) of the substrate holder (400).

The substrate holder (400) may be a holder for directly mounting the light emitting unit. In this example, as shown in FIG. 10, the solenoid device (55) of the thermocouple type safety valve is forcibly opened by the operating device having the above-described configuration, the ignition device (7) is activated, and the solenoid valve (55) is operated. ) For a certain period of time in the forced valve open state.
The switch (63) for starting 1) is turned on.

Accordingly, the actuator of the switch (63) is interlocked with the valve press fitting (5), and the input side spindle (57) of the opening / closing mechanism (56) of the solenoid valve (55) is connected to the valve press fitting (5). ). The switch (63) may be controlled by the spindle (57). When the spindle (57) is pushed in, the valve body of the solenoid valve (55) is opened, and the iron piece connected to the valve body is attracted to an internal electromagnet. It is a mechanical unit.

At the same time when the spindle (57) is pushed in, the switch (63) is turned on, the ignition device (7) is activated, and the ignition plug (71) is discharged to the flame hole of the gas burner (16). Is ignited. At the same time, the forced adsorption timer (61) is activated, and the electromagnet is maintained in a conductive state by the power of the dry battery (62) for the set time (T). This keeps the solenoid valve (55) open.

Thereafter, when the thermocouple (6) is heated to a predetermined temperature, a current is generated in the thermocouple circuit (60) by a predetermined thermoelectromotive force, and the electromagnet is turned on by the current by the thermoelectromotive force. The iron piece is kept in the adsorption state. Therefore, the set time (T) of the forced adsorption timer (61) is set longer than the time required until the predetermined thermoelectromotive force is generated. In this example, as shown in FIG. 13, the light emitting unit is controlled by a signal from the thermocouple circuit (60) and a signal from the forced adsorption timer (61).
A light emission control circuit (64) for controlling the light emission of (31).
And 4 corresponding to the display control means). Accordingly, even after the operation button (2) is operated and before the thermocouple is brought into the adsorption state by the thermoelectromotive force, the light emitting display section (B) of the light emitting unit (31) keeps the forced adsorption timer (61).
Relay conducted by the Output contacts (R ₂₎ (R ₂₁₎
To maintain the light emitting display state. Thereafter, the light emitting unit (31) is turned on by the output of the detection circuit (65) for detecting that the thermoelectromotive force of the thermocouple element (6) has reached a certain level, and the light emitting state is maintained. Of course, when the thermoelectromotive force of the thermocouple (6) falls below the set value due to the disappearance of the flame in the flame hole of the gas burner (16), the output of the detection circuit (65) becomes LOW. ) Turns off,
The light emitting unit (31) enters a non-display state.

An LED or the like can be used for the light emitting display section (B). Further, in the circuit of FIG. 13, the output contact (R ₁₁ ) of the relay (R ₁ ) which is turned on by the output of the forced suction timer (61).
As a result, the excitation coil (551) of the solenoid valve (55) is forcibly brought into the conductive state, forcibly adsorbed, and kept in the valve open state during the operation of the forcible adsorption timer (61). On the other hand, the thermocouple (6) keeps the solenoid valve (55) open even if the thermocouple is activated during this period and the forced adsorption timer (61) is deactivated as described above.

In FIG. 14, the indicator lamp (3) also indicates that the solenoid valve (55) is kept open after the forced adsorption timer (61) is deactivated.
In the same way as in 1), the battery (6
2). In the example described above, the light emitting unit (31) is built in the operation button (2), but it may be provided at any position on the front surface of the appliance. Also,
As the flame detection device, a thermocouple type flame detection device combining a thermocouple element (6) and a detection circuit (65) for detecting that the thermoelectromotive force of the thermocouple circuit has reached a certain level is used. However, other flame detecting devices, such as a frame rod, which output a detection output in response to the presence or absence of a flame of the gas burner can be used.

The display control means includes a forced suction timer
In addition to using (61), after the display means is displayed by operating the operation button (2) to the ignition position, the ignition device (7)
The display may be controlled in response to the output from the flame detection circuit at the end of the operation.

[Brief description of the drawings]

FIG. 1 is an external view of a table stove.

FIG. 2 is a sectional view of the operation button (2) in a non-operation state.

FIG. 3 is a sectional view of an operation state of an operation button (2).

FIG. 4 is a sectional view of an embodiment of the present invention in which an operation button (2) is mounted on a front plate (11).

FIG. 5 is a rear view showing a state in which the operation button (2) is attached, showing a state in which the electric cord (32) is pulled out to the side as it is;

FIG. 6 is an exploded perspective view of a substrate (30), a substrate holder (400), and a valve holding member (5).

FIG. 7 is a plan view of the substrate holder (400).

FIG. 8 is a front view of the substrate holder (400).

FIG. 9 is an explanatory view of a substrate (30).

FIG. 10 is an explanatory diagram of a gas circuit and an electric circuit.

FIG. 11 is a rear view of the state where the electric cord (32) is pulled out from the fulcrum shaft (26).

FIG. 12 is a detailed view of a cord holding piece (28).

FIG. 13 is an electric circuit diagram showing a relationship between a light emission control circuit (64) and a forced suction timer (61) according to the embodiment of the present invention.

FIG. 14 is an electric circuit diagram including another example of the drive circuit of the solenoid valve (551).

[Explanation of symbols]

 (31) ・ ・ ・ Light emitting unit (B) ・ ・ ・ Light emitting display (2) ・ ・ ・ Operation button (21) ・ ・ ・ Window (64) ・ ・ ・ Light emitting control circuit (61) ・ ・ ・ Forced suction timer In the drawings, the same reference numerals indicate the same or corresponding parts.

Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23N 5/26

Claims (4)

(57) [Claims] 1. A gas appliance comprising: an ignition device for igniting a gas burner by operating an operation button to an ignition position; a flame detection device for detecting the presence or absence of flame of the gas burner; The display means is set to the display state in response to the operation to the ignition position, and the display means is set to the display state in response to the detection output of the presence of flame of the flame detection device after the operation, and the detection output without flame is performed. A gas appliance ignition display device provided with a display control means for setting the display means to a non-display state in response to the control signal. 2. The flame detecting device according to claim 1, further comprising: a thermocouple circuit that generates a thermoelectromotive force in accordance with a heating temperature of a thermosensitive portion heated by a flame formed in the gas burner, wherein the thermoelectromotive force is set to a set value. 2. The ignition display device for a gas appliance according to claim 1, wherein a detection output indicating presence of a flame is generated, and a detection output indicating no flame is generated when the thermoelectromotive force does not reach the set value. 3. The ignition display device for a gas appliance according to claim 1, wherein display means is provided on a part of the operation button. 4. The display control means includes a timer for setting the display means to a display state for a set time in response to an operation of the operation button to the ignition position, wherein the set time is set to the ignition position of the operation button. When the gas burner is ignited after the operation described above, the flame detector is set longer than the required time until the flame detection output is outputted, and the thermocouple circuit is an electromagnetic valve inserted into the gas circuit to the gas burner. Excitation coil is inserted, the valve body of the solenoid valve is forcibly opened by the operation of the operation button to the ignition position, and is automatically closed in the excitation coil non-conductive state, the thermocouple circuit of the The ignition display device for a gas appliance according to claim 2 or 3, further comprising means for supplying valve opening maintaining power other than thermal electromotive force to the exciting coil for a set time of the timer.