KR100255179B1 - Gas apparatus having an electronic latch valve - Google Patents

Abstract

PURPOSE: A gas equipment having a latch type electronic valve is provided to ignite in a strong fire power without shutting of the electronic valve although vibration by a blow is applied to the electronic valve. CONSTITUTION: A gas equipment having a latch type electronic valve includes a latch type electronic valve(3), a piezoelectric sensor and a controlling device. The latch type electronic valve is inserted into a gas supply path of a burner, maintains a plunger(33) in a valve opening state against resilient force by a permanent magnet(34) and maintains the plunger in a valve closing state by the resilient force. The piezoelectric sensor supplies gas to the burner by the opening of the electronic valve and causes spark discharge by a blow of a hammer. The controlling device controls the electric charge in a direction that the plunger is moved in a valve opening direction.

Description

Gas mechanism with latch solenoid valve

The present invention relates to a gas mechanism comprising a latch solenoid valve and a piezoelectric element for ignition, and causing ignition with the latch solenoid valve open.

BACKGROUND ART Gas appliances are known which automatically detect the temperature of the bottom of a pan during cooking and automatically switch the burner's fire power so that the oil temperature in the pan becomes constant in the case of frying. In the gas mechanism, an on-off valve is installed in the gas supply passage, and a small flow rate bypass path is formed to bypass the on-off valve. When the bottom of the pot is lower than the set temperature, the on-off valve is opened. If the temperature at the bottom of the pot exceeds the set temperature, the shut-off valve is closed to supply gas through the bypass passage to weaken the thermal power. In the case of using a battery as a power source for the gas appliance, a latch-type solenoid valve is used as an on / off valve to reduce power consumption. When the on / off state is switched by short-time energization, the magnetic force of the permanent magnet is stopped even when the energization is stopped. And by the holding force of the spring to maintain the open state.

On the other hand, when an ignition plug is installed near the burner, for example, when spark discharge is generated between the burner and the spark plug to ignite the gas ejected from the burner, the piezoelectric element is struck by a hammer in conjunction with the ignition operation to ignite. BACKGROUND ART Gas mechanisms for generating high voltages that apply voltage to plugs are known.

When the amount of gas supplied to the burner is small at the time of ignition, it is difficult to ignite. Therefore, it is necessary to forcibly increase the fire power to a medium fire or more at the time of ignition. And in the gas appliance provided with the latch solenoid valve in a gas supply line in order to adjust a thermal power during cooking, it is preferable to make the latch solenoid valve open and to ignite in a strong fire state at the time of ignition. However, in order to switch the open / close state of a latch type solenoid valve, you may carry out short time energization of about 100 microseconds. Therefore, even if the ignition operation starts immediately after energizing the latch solenoid valve and leaving it open, if the hammer strikes the piezoelectric element after the energization is stopped, the vibration caused by the blow is transmitted to the latch solenoid valve and the magnetic force of the permanent magnet Since the valve opening holding force cannot withstand the vibration caused by the blow, the latch-type solenoid valve is closed, and only a small amount of gas is supplied to the burner, thereby causing a problem of ignition. In addition, in a gas mechanism for igniting and extinguishing a main burner with a latch-type solenoid valve without forming a bypass path, when the main burner is to be ignited by a spark discharge by the hammer hitting, When the latch-type solenoid valve is closed due to vibration, there is a problem that the gas cannot flow to the main burner and thus cannot be ignited.

Accordingly, an object of the present invention is to provide a gas mechanism in which the latch-type solenoid valve is not closed even when the piezoelectric element is hit by a hammer.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the structure of one Embodiment of this invention.

2 is a view showing an arrangement of a hammer and a piezoelectric element;

3 is a cross-sectional view showing the structure of a latch-type solenoid valve

4 is a diagram showing energization control timing at ignition;

5 is a circuit diagram for reversing the energization direction of the electromagnetic coil.

Explanation of symbols for main parts of the drawings

1-Burner 2-Rotary Cock

3-Latched Solenoid Valve 4-Safety Valve

5-Control 22-Hammer

23-piezoelectric element

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention applies the electromagnetic force which generate | occur | produces by energization of an electromagnetic coil to the plunger carried in the valve closing direction, moves the said plunger to a valve opening direction, and stops electricity supply to an electromagnetic coil. After the plunger is held in the valve-open state against the holding force adsorbed by the permanent magnet, the plunger, which weakens the suction force of the permanent magnet to the plunger by energizing in the reverse direction to the electromagnetic coil, is kept in the valve closed state. The latch-type solenoid valve is inserted into the gas supply path to the burner to supply gas to the burner through the gas supply path by opening the latch-type solenoid valve, and the piezoelectric element causes spark discharge by the hammer hit during ignition operation. A gas appliance provided with an element, the plunger being moved in the valve opening direction at least when the hammer strikes the piezoelectric element. Key is characterized by comprising a control device for conducting control so that the current supply state in the direction.

During ignition, the energization time is adjusted so that the hammer becomes energized when the hammer strikes the piezoelectric element, so that even if the vibration caused by the blow is transmitted to the latch-type solenoid valve, it is possible to cooperate with the magnetic force generated by the permanent magnet and the electromagnetic force generated from the energized state. As a result, the plunger is maintained in the valve open state. Since the vibration does not occur when the blow is completed, the latch-type solenoid valve maintains the valve open state by the magnetic force of the permanent magnet even when the energization is stopped.

By the way, in order to prevent the latch type solenoid valve from closing even if the hammer timing is slightly shifted, it is necessary to set the energization time during ignition relatively long. On the other hand, since the vibration by the hammer strike does not occur after the ignition, the energization time when opening and closing the latch valve for controlling the thermal power may be shortened.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing.

Referring to Fig. 1, reference numeral 1 denotes a burner attached to a gas table which is a gas appliance. The burner 1 is supplied with gas through the gas supply passage 11. The thermal power of the burner 1 is controlled by the pivoting operation on the rotary cock 2. As shown in FIG. 2, the rotary cock 2 is provided with the rotation operation shaft 25, and the piezoelectric element by the holding force of the piezoelectric element 23 and the spring 24 in the vicinity of the rotation operation shaft 25 is shown. The hammer 22 which strikes 23 is provided. An arm 26 pivoting integrally is attached to the pivoting operation shaft 25. When the pivoting operation shaft 25 rotates to the left during ignition, the arm 26 causes the hammer 22 to strike the spring 24. The arm 22 moves away from the hammer 22 while the opening of the rotary cock 2 is opened to a middle light or more. 23) to hit. In addition, the micro switch 21 is attached in the vicinity of the rotation operation shaft 25, and is turned ON when the rotation operation shaft 25 is rotated in the valve opening direction in a valve closing state. In addition, a latch type solenoid valve 3 is fitted to the gas supply passage 11 and a bypass path 12 for bypassing the latch type solenoid valve 3 is formed. An orifice 13 in which the throttle amount is set is attached to the bypass passage 12.

Referring to FIG. 3, the latch-type solenoid valve 3 closes the gas supply passage 11 by placing the valve body 32 on the valve seat 31. In the valve closing state, the gas throttled to the orifice 13 is supplied to the burner 1 through the bypass passage 12. On the other hand, as shown in FIG. 3, in the state where the plunger 33 is attracted to the core 35 by the magnetic force of the permanent magnet 34, the valve body 32 opens the valve away from the valve seat 31. In the state, the gas is supplied to the burner 1 through the gas supply passage 11 without being throttled. In addition, a coil spring 36 is provided between the plunger 33 and the core 35. When the position of the plunger 33 is switched from the valve closed state to the valve open state, the electromagnetic coil 37 is connected to the electromagnetic coil 37. By cooperating with the electromagnetic force generated by energization and the magnetic force of the permanent magnet 34, the plunger 33 is made to adsorb | suck to the core 35 against the holding force of the spring 36. As shown in FIG. Once the valve is opened, the valve open state is maintained by the magnetic force of the permanent magnet 34 even if the energization to the electromagnetic coil 37 is stopped. Next, when the energization direction is reversed with respect to the electromagnetic coil 37, the electromagnetic force generated in the electromagnetic coil 37 negates the magnetic force of the permanent magnet 34, and the plunger ( 33) is moved to the right in FIG. By the way, for example, the circuit shown in FIG. 5 is used for reversing the energization direction to the electromagnetic coil 37. As shown in FIG.

In addition, an electronic safety valve 4 is fitted upstream of the gas supply passage 11. In the vicinity of the burner 1, an ignition plug 13 connected to the piezoelectric element 23 is attached. When the hammer 22 strikes the piezoelectric element 23, the spark plug 13 and the burner 1 are separated. It is configured to ignite due to spark discharge. In the vicinity of the burner 1, the thermistor 15 which detects the thermocouple 14 and the bottom surface temperature of the pot P is provided in the position heated by fire, and both sides are connected to the control apparatus 5. It is. In addition to the control device 5, a micro switch 21 and a latch type solenoid valve 3 are connected. The safety valve 4 is held open by the thermoelectric power of the thermocouple 14, and since the thermoelectric power is not output when it is misfired during cooking, the valve is closed and the supply of gas to the burner 1 is blocked. In addition, the control device 5 operates the battery 51 as a power source.

Referring to Fig. 4, when the ignition operation is performed, the micro switch 21 is turned on, so that the control device 5 detects that the ignition operation has been performed. Then, electricity is supplied to the latch-type solenoid valve 3 in the direction of moving the plunger 33 to the valve open position. If the latch-type solenoid valve 3 is in the open state at the time of energization, it does not change while the valve is open. If the valve is in the closed state at the start of energization, the latch-type solenoid valve 3 is switched to the open state almost simultaneously with the start of energization. The energization time required for switching the latch solenoid valve 3 to the open state may be about 100 ms, but the energization is continued for about 2 seconds when energizing during ignition. In this manner, if the electric current is continued for about 2 seconds, even if the hammer 22 hits the piezoelectric element 23 and vibrates, vibration is generated while the energization is continued, and the plunger 33 is a permanent magnet 34 Since it is adsorbed to the core 35 by the electromagnetic force of the electromagnetic coil 37 in addition to the magnetic force of), the valve-opening state is maintained without escaping the valve from the core 35. In this way, since the piezoelectric element 23 is blown while the latch-type solenoid valve 3 is applied with the electromagnetic force by the electromagnetic coil 37 and the valve open state is maintained, the amount of gas supplied during ignition is sufficiently sufficient to ignite. can do. By the way, in the case where the energization is continued for 2 seconds, the energization of about 100 kV may be repeated for 2 seconds.

The operation will be described in detail with reference to FIG. When the micro switch 21 is turned on, the 2s timer installed in the control device 5 is turned on to energize the electromagnetic coil 37 in the valve opening direction for 2 seconds. On the other hand, even if the hammer 22 hits the piezoelectric element 23 and there is vibration, it is energized for 2 seconds, so the vibration is in the state of being energized even if the vibration generated during energization stops. After 2 seconds have passed, the energization is stopped, but the latch-type solenoid valve 3 remains open. Moreover, since the burner 1 is ignited, the temperature of the pot bottom detected by the thermistor 15 increases. When the temperature of the pot bottom reaches the predetermined set temperature H, the electromagnetic coil 37 is energized in the valve closing direction. Then, the latch-type solenoid valve 3 is immediately switched to the valve closed state. Since vibration does not occur at the time of energization, electricity is supplied only for 100 mm seconds by operating a 100 Hz timer installed in the control device 5. When the latch type solenoid valve 3 is closed, since the thermal power of the burner 1 becomes small, the temperature of the pot bottom will fall. When the temperature of the pot bottom is lower than the set temperature (L), by opening the latch-type solenoid valve (3) again to adjust the thermal power so that the temperature of the pot bottom is constant.

In addition, the burner 1 may be ignited and extinguished by opening and closing the latch-type solenoid valve 3 without forming the bypass passage 12, and the heat control may be applied. In this case, in the gas supply path, the non-ignition ignition is effected by the burning burner branched upstream of the latch-type solenoid valve. Moreover, although the rotary cock 2 was used in the said embodiment, the ignition pushbutton and the thermal control valve by a lever may be used, and although the safety valve was kept open by the thermoelectric power, it opened and closed by a control apparatus. It may be configured to be controlled.

As can be seen from the above description, the present invention is energized in the direction of switching the plunger to the valve-opening side in the latch-type solenoid valve when the hammer strikes the ignition operation, so that the vibration caused by the impact acts on the latch-type solenoid valve. Even if the latch-type solenoid valve is not closed, the ignition can be performed in a state of strong thermal power.

Claims (2)

An electromagnetic force generated by energization of the electromagnetic coil is applied to the plunger held in the valve closing direction, thereby moving the plunger in the valve opening direction, stopping the energization of the electromagnetic coil, and then adsorbing the plunger by the permanent magnet. The plunger which keeps the valve open against the force of force and weakens the adsorption force of the permanent magnet to the plunger by energizing in the reverse direction to the electromagnetic coil is moved in the valve closing direction and energizing in the reverse direction to the electromagnetic coil. After stopping, install a latch-type solenoid valve which holds the plunger in the valve closed state by the holding force into the gas supply passage to the burner, and supply gas to the burner through the gas supply passage by opening the latch-type solenoid valve. Further, a gas mechanism including a piezoelectric element that causes spark discharge by a hammer strike at the time of ignition operation, at least the pressure A gas mechanism having a latch-type solenoid valve, characterized in that it is provided with a control device for conducting electricity so as to be energized in a direction in which the plunger is moved in the valve opening direction when the hammer strikes all elements. The method according to claim 1, A gas appliance provided with a latch solenoid valve, wherein the energization time when the hammer is hit is set to be longer than the energization time for thermal control during cooking.