KR20060084526A - Gas flow control equipment and method for gas range - Google Patents

Abstract

The present invention relates to an apparatus for controlling the flow rate of the continuous gas applied to the gas range is supplied to the gas range. In general, the flow rate control of the gas supplied to the gas range is mostly using a manual gas control cock. In the case of manually operated gas control coke, the gas flow rate cannot be precisely adjusted and the gas flow rate cannot be adjusted automatically over time. Therefore, it is impossible to control the gas volume of the gas range by home networking, which will be expanded in the existing manual operation gas scope.

The present invention is a gas flow rate control device for a gas range in which the flow rate of the gas is precisely controlled by a control program applied to the electronic gas range, characterized in that the opening and closing of the gas flow path are controlled electronically.

Therefore, the gas flow rate control apparatus and method for a gas range according to the present invention is essential for the remote control of home appliances by home networking technology, which will be expanded worldwide in the future, and the gas flow rate control apparatus and method for a gas range according to the present invention in particular Since the flow rate is precisely controlled by the microcomputer program, it is possible to perform optimal cooking by precisely adjusting the amount of heat according to the cooking type, and to reduce unnecessary gas waste and to prevent safety accidents due to overheating. will be.

Stepping motor, drive shaft, throttle, solenoid, lifter,

Description

Gas flow control equipment and method for gas range {Gas flow control equipment and method for gas range}

1 is a cross-sectional view of a conventional gas control valve,

2 is an external view of a gas flow rate control apparatus and method for a gas range according to the present invention;

3 is a cross-sectional view of a gas flow rate control apparatus and method for a gas range according to the present invention;

4 is an exploded perspective view of a gas flow rate control apparatus and method for a gas range according to the present invention;

5 and 6 are detailed exploded perspective views of a gas flow rate control apparatus and method for a gas range according to the present invention;

7 is a cross-sectional view of the safety shut-off means of the gas flow rate control device and method for a gas range according to the present invention,

8 is an exploded perspective view of a safety shut-off means of the gas flow rate control apparatus and method for a gas range according to the present invention;

9 is a cross-sectional view of the adjusting means for the gas flow rate control apparatus and method for a gas range according to the present invention;

10 is a view illustrating control characteristics for each rotation angle of the flow rate adjusting means for the gas flow rate control apparatus and method for a gas range according to the present invention;

      11 is a block diagram illustrating a control system for a gas flow rate control apparatus and method for a gas range according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: stepping motor 13: drive shaft

20: base 30: throttle

40: lifter 49: first spring

50: body 60: adsorption unit

69: second spring 70: solenoid

80: cover 100: rotational force transmission means

200: adjustment means 300: lift means

400: safety blocking means

The present invention is an apparatus and method for adjusting the gas flow rate supplied to the gas range for cooking appliances as gas flow rate control device of most gas ranges on the market is to control the flow rate of the gas at the rotation angle of the cock by manual or block the flow path Was performed. Patent (10-0441130) is a typical technique for the gas flow rate control device and method for a gas range according to the present invention. The prior art will be described below with reference to the registered patent.

1 is a cross-sectional view of the registered patent.

The overall structure will be described first, the electromagnet 25 formed in an E-shape form, the slide plate 24 installed in close contact with the upper portion of the electromagnet 25, and the slide plate 24 in close contact with each other The rod magnet 23 is installed so as to slide in, and the inlet port 22 is formed in the upper center, characterized in that consisting of the slide plate, the valve body 21 for receiving the rod magnet, the electromagnet 25 The direction of the magnetic pole of the electromagnet is changed according to the direction of the energized current, so that the bar magnet 23 is moved in the left or right direction by the suction force and the repulsive force act. In addition, between the upper portion of the bar magnet 23 and the valve body 21, a variable resistance contact 39 whose resistance value changes in accordance with the moving distance and an output terminal 36 for outputting the resistance value are provided. Therefore, the movement distance of the bar magnet can be precisely controlled by detecting a change in the resistance value according to the movement of the bar magnet. In addition, a central through hole (23a) is formed in the center of the bar magnet 23, the orifice (33) installed in close contact with the upper portion of the central through hole (23a) and the orifice hole (34a) formed in the orifice (33) The cross-sectional area is changed to control the flow rate.

As described above, since gas closing is performed by the close contact between the slide plate 24 and the bar magnet 23, the flatness between the contact surfaces must be precise, and a sealing grease must be applied to prevent the leakage of gas. Therefore, the sliding action between the bar magnet and the slide plate 24 is smooth, but when used for a long time, the driving force of the bar magnet is lowered due to an increase in the viscosity of the sealing grease, so that the bar magnet is not smoothly operated. Therefore, it becomes impossible to control the gas flow rate due to the movement of the bar magnet, and if the gas is not blocked, it causes a safety accident such as gas leakage. In addition, the detection of the resistance value is inaccurate due to the wear of the contact 35, the position control function is deteriorated accordingly, so that the flow rate adjustment function is incorrect is a disadvantage of the prior art. In addition, the suction force between the electromagnet and the bar magnet increases the friction force between the bar magnet and the slide plate, which hinders the movement of the bar magnet. About 20W). Therefore, a relatively large power consumption is required, and the capacity of the driving circuit for driving the electromagnet also increases, causing the cost of the driving circuit to increase.

       As described above, it is possible to compensate for the shortcomings of the gas flow control device of the prior art, and there is no characteristic change due to long-term use, and it is possible to control simply and precisely by the digital signal of the microcomputer, and the power consumption and operation noise are extremely low. The present invention proposes a low gas range gas flow control device and method.

The present invention has been made to solve the above problems, by adjusting the flow rate of the gas by the rotation of the stepping motor rotates by a predetermined angle by the digital signal output from the microcomputer, the part of the rotational force of the stepping motor is safe It is a feature of the present invention to operate the blocking means and to significantly reduce the current consumption by using a thermocouple without using a separate power source for maintaining the safety blocking means.

Hereinafter, a gas flow rate control apparatus and method for a gas range according to the present invention will be described in detail with reference to the drawings.

2 is an external perspective view of a gas flow rate control apparatus and method for a gas stove according to the present invention, the body 50 having an inlet 54 formed on one side of the lower side and an outlet 53 formed on the upper side thereof, and the body 50. ) It is composed of a stepping motor 10 provided on the top.

3 is a cross-sectional view of a gas flow rate control apparatus and method for a gas range according to the present invention;

Stepping motor 10 provided in the upper portion, the motor shaft 11 formed in the stepping motor 10, the drive shaft 13 is combined with the motor shaft 11 to transfer the rotational force of the stepping motor to the lower portion (13) And a control plate 30 installed below the drive shaft 13 to control the flow rate while being rotated at a predetermined angle by receiving the rotational force of the drive shaft 13, and closely attached to the lower side of the control plate 30. A lifter 40 for converting rotational force into a vertical motion, an adsorption unit 60 installed below the lifter 40 to perform a safety cutoff of gas, and a core for transmitting magnetic force to the adsorption unit 60. A solenoid 70 formed of a 72 and a frame 71 and a body 50 accommodating the parts and guiding a gas passage.

4 is an exploded perspective view of the gas flow rate control apparatus and method for a gas range according to the present invention, a stepping motor 10 providing a rotational force, and a rotational force transmission means 100 including a driving shaft 13. ;

An adjustment means (200) installed below the rotational force transmission means (100) and configured to include a control plate (30) and a base (20) for rotating displacement by a predetermined angle and controlling a flow rate;

A lift means (300) which is slid and moved downwards by a predetermined distance with respect to the relative rotation with the control plate (30);

Safety blocking means (400) for maintaining a flow path opened by the lift means (300);

It is characterized by consisting of a body 50 and a cover 80 for guiding the flow path for receiving or fixing the means.

5 and 6 show a cross-sectional view of an exploded perspective view of the gas flow rate control apparatus and method for a gas range according to the present invention, the rotational force transmission means consisting of a stepping motor 10 and a drive shaft 13 from the top The drive shaft 13 has a shaft insertion groove 14 is formed in the upper center so as to be coupled at constant speed to the motor shaft 11 provided in the lower portion of the stepping motor 10, the upper one side The rotary stopper 15 formed in the contact with the fixed stoppers 22a and 22b formed on the base 20 is constrained to stop rotation.

The drive shaft 13 is inserted into the base 20 to provide a turning force to the control plate 30. In addition, the base 20 is inserted into the upper end of the body 50, the flow rate is adjusted according to the relative rotation angle of the control plate 30, the first sealing 16 between the drive shaft 13 and the base 20 This is installed can transmit the driving force to the control plate 30 without the gas inside the body leaks. The lower portion of the drive shaft 13 has a cross-shaped cruciform groove 17 having a cross section and a cross-shaped cross protrusion 32 formed on the top of the control plate 30 slide together to rotate the rotational force. While being transferred to the throttle 30, the throttle plate to be in close contact with the high-tight sealing surface 27 of the bottom of the base (20).

On the other hand, the adjustment hole 33 formed in the control plate 30 is in close contact with the high-tight sealing surface 27 of the lower end of the base 20 to adjust the flow rate while rotating. As shown in FIG. 10, the high tightly closed surface 27 has an adjustment groove 26 and an adjustment hole 26a formed in the same circular shape so that the adjustment hole 26 is in close contact with the control groove 26 while rotating. And the flow rate is determined according to the passage cross section of the control through hole (26a).

On the other hand, the first spiral surface 34 formed at the lower end of the control plate 30 is always in close contact with the second spiral surface 44 of the lifter 40 installed in the lower portion of the control plate 30, so that the rotation angle Accordingly, the first spiral surface 34 pushes up the second spiral surface 44 formed on the lifter 40. The lifter 40 has a cross-shaped slide protrusion 42 formed therein, and the slide protrusion 42 is inserted so as to slide to each other in the slide groove 55 formed in the body 50. 40 does not rotate while it slides up and down.

The first spring 49 is installed at the lower end of the first spring support groove 56 and the lifter 40 formed in the body 50, so that the lifter 40 is always supported in the upward direction so that the second spiral surface ( 43 and the first spiral surface 34 is always in close contact with each other, and also the rotational sealing surface 31 of the control plate 30 is in close contact with the high sealing surface 27 of the base 20.

A push protrusion 45 and a second protrusion 46 are formed at the center of the lower end of the lifter 40, and a blocking surface 61 a is formed at the lower side of the push protrusion 45 at the suction unit 60, which is a magnetic material. have. When the stepping motor 10 rotates in the clockwise direction, the lifter 40 slides downward while the push protrusion 45 at the bottom of the lifter pushes down the blocking surface 61a of the suction unit 60, thereby preventing the blocking surface. The flow path is opened while 61a is spaced apart from the blocking ribs 57 formed in the body.

As described above, the suction unit 60 continuously descends by the operation of the lifter 40, and the suction unit 60 contacts the solenoid 70, and when the current flows through the solenoid 70, the suction is performed. The unit 60 is held in a state of being adsorbed by the solenoid. At this time, the rotation direction of the stepping motor 10 is rotated counterclockwise, so that even if the lifter 40 returns to the upper layer, the adsorption unit 60 maintains the adsorption state by the magnetic force of the solenoid 70, The blocking surface 61a of the suction unit is also spaced apart from the blocking rib 57 to maintain an open state of the flow path.

That is, as illustrated in FIG. 10, the flow rate Q for each rotation angle and the moving height of the lifter 40 according to the direction rotation state 150 and the counterclockwise 151 rotation state of the control plate 30. (H) and the holding current I flowing through the safety interrupting means 400 are shown graphically. That is, when the adjustment plate 30 starts to rotate in the clockwise direction 150, the flow path is opened by the lifter 40, but the adjustment groove 26 is formed on the rotational sealing surface 31 formed on the adjustment plate 30. It is sealed and the flow path is blocked. Therefore, since the burner is not burned and no electromotive force is induced in the thermocouple 700, since the magnetic force of the solenoid 70 is not applied to the adsorption unit 60, the adsorption unit 60 cannot be adsorbed. To the solenoid 70. When the control plate 30 is further rotated clockwise to come to the position of B, the movement of the lifter is maximized, and the adsorption unit 60 is adsorbed to the solenoid 70 as described above, and the safety blocking means 400 is performed. Is kept open by the amplifier's current.

When the throttle plate rotates in the counterclockwise direction 151 to the C position, the lifter 40 is spaced apart from the blocking surface 61a of the suction unit 60 and descends along the spiral surface. Therefore, the movement path of the lifter 40 rises in the form of a graph 161a, but the adsorption unit 60 and the blocking surface 61a remain in the adsorbed position in the form of a graph 161 to maintain an open state. Will be done. When the counterclockwise rotation is further made from the C position to the D position, the position of the adjustment hole 33 of the adjustment plate starts to overlap with the adjustment groove 26 of the base 20, so that a small amount of flow rate flows out and the adsorption unit ( 60 is absorbed by the solenoid 70, the safety shut-off means 400 is kept open by the current 162 of the amplifier. Therefore, when the combustion burner is ignited, a thermoelectric current 162a is generated in the thermocouple 700 and flows in combination with the existing amplifier current. From this time, the current 162 of the amplifier is controlled to decrease gradually. That is, it is a feature of the present invention that the thermal current 162a of the thermocouple 700 is gradually increased while the current 162 of the amplifier is gradually decreased to control the current flowing through the same.

When it is further rotated counterclockwise from the D position to the E position, the position of the adjustment hole 33 of the adjustment plate completely overlaps the adjustment groove 26 of the base 20, and a large amount of flow is discharged and the adsorption unit 60 ) Is adsorbed to the solenoid 70, the safety shut-off means 400 continues to maintain the open state by the open current (162a) of the thermocouple 700. In this state, when the reverse current 162b is energized to the solenoid 70 of the safety shutoff means 400, the heat current is canceled and eventually the current flowing to the solenoid 70 is canceled, so that the solenoid 70 is the suction unit 60. ), The blocking surface 61a is supported by the second spring 69, and the blocking rib 57 is closed by pressure to block the flow path. In addition, if the control plate 30 is rotated to the position of B, the adjustment groove 26 is sealed in the rotary sealing surface 31 and the flow rate is blocked so that the burner stops combustion, and thus the heat current of the thermocouple disappears. Since the solenoid 70 is separated from the adsorption unit 60, the blocking surface 61a is pressed against the second spring 69 while the solenoid 70 is pressurized to close the blocking rib 57 to block the flow path.

Therefore, the gas flow rate control apparatus and method for a gas range according to the present invention comprises the steps of opening the safety shut-off means 400 (ABC step), adjusting the flow rate at a specified angle (C ~ E), and adsorption holding Closing the flow path by blocking the current (F), characterized in that the operation of the flow rate adjustment is made in three steps. In addition, since the adsorption unit 60 is not attracted by the magnetic force of the solenoid as described above, but is adsorbed using the rotational driving force of the stepping motor 10, once the strong magnetic force is not applied to the solenoid, the adsorption unit 60 ) Is held by the solenoid 70, the adsorption is maintained even with extremely small magnetic force, so that the extremely small power (about 0.5 W) is initially ignited compared to the power consumption (about 6 W) of the conventional solenoid valve. It is characterized by being consumed for a short time (about 4 seconds) during and during digestion. Accordingly, the size and cost of the power supply (transformer, rectifier circuit, etc.) for supplying power to the solenoid will be significantly reduced. In addition, since the lifting speed of the lifter 40 moves to the adsorption unit side is considerably slow, about 1 mm / sec., The noise of noise is hardly generated due to mutual contact during the lift, and when the flow path is blocked by blocking the holding current of the solenoid, It only generates an extremely low impact noise generated when the blocking surface 61a of the rubber material strikes the blocking rib 57.

On the other hand, when opening the flow path by lifting the safety blocking means 400, the adjustment groove 26 formed in the base 20 is closed on the rotary sealing surface 31 formed on the control plate 30 to close the control flow path Therefore, there is no fear of gas leakage even if a power failure occurs while the flow path is opened by lifting the safety shutoff means 400. Therefore, when the flow control method of the conventional electric transmission method is a power failure in the open state, the open channel is maintained to remove the risk of safety accidents due to the leakage of gas.

7 and 8 are a cross-sectional view and an exploded perspective view of the safety blocking means 400 according to the gas flow control device and method for a gas range according to the present invention. The adsorption unit 60 which is adsorbed by the magnetic force of the solenoid 70 and maintains the open state of the flow path is composed of an adsorption plate 60b formed of a magnetic material and a closing rod 61 of rubber material, and formed on the closing rod 61. A central hole 60a in the center of the suction plate is inserted into the fixing groove 63 to fix the suction plate. A second spring mounting portion 64 is formed at the lower portion of the closing rod, and a guide rib 65 formed at an outer portion of the second spring mounting portion 64 is provided to hold the second spring 69 in the core of the solenoid. 72 is characterized in that it is installed to slide inside.

The solenoid 70 is composed of a core 72 and a frame 61 composed of a coil 74 for generating magnetic flux and a magnetic material concentrating the generated magnetic flux to a suction unit.

9 is a cross-sectional view of the adjusting means 200 according to the gas flow rate control apparatus and method for a gas range according to the present invention. The flow rate control is installed in close contact with the base 20 and the lower end of the base, the flow rate is adjusted by the relative rotational displacement of the control plate 30 to rotate at a predetermined angle, the characteristics of the flow rate (Q) and the lift ( The characteristic graph according to the displacement H of 40) and the flow path holding current I is as shown in the lower part of FIG. 10, and the description of the operation is the same as described in the previous chapter.

11 is a control block diagram of the gas flow rate control apparatus and method for a gas range according to the present invention, when a digital control signal is applied from the microcomputer to the stepping motor 10, the control means is operated to adjust the flow rate of the gas, lift Operate the means to open and close the safety shut-off means. On the other hand, the heat generated from the burner generates a heat current in the thermocouple 700 to supply the holding current of the safety shut-off means, and the blocking current for the holding current and the reverse current by the amplifier is energized only for a predetermined time during the initial ignition and extinguishing. It features.

      That is, the power consumption of the gas flow control device for the gas range is reduced to less than 1W, and the safety shut-off means is provided so that it can be automatically extinguished when there is no flame in the gas range, and the flow rate is precisely controlled by the digital flow control signal. When the burner of the gas range maintains the combustion state, since the holding current necessary for opening the safety shutoff means is supplied from the thermocouple 700, a separate holding current is not required, and thus the current consumption is extremely small. It is a feature of the invention. In addition, the operation noise is extremely low, completely eliminating the solenoid operation noise generated in the prior art. Moreover, the gas flow rate control apparatus and method for a gas range according to the present invention can close the gas even without a separate shutoff valve, thereby reducing the total number of parts of the gas range, thereby achieving cost reduction. Therefore, the gas flow rate control apparatus and method for the gas range according to the present invention will be widely distributed in the future, and connected to a home automation or home network that automatically controls home appliances communication devices in the home, and thus the utilization of the gas range to which the present technology is applied is possible. In this case, it is expected that the effect of the automatic cooking by the gas appliance in the home or business and the dissemination of the cooking program through the download of the desired cooking program will be great.

In addition, it is possible to supply the optimal heat quantity according to the optimal cooking time to the gas range, which reduces cooking time, prevents safety accidents such as cooking burnout caused by unnecessary gas supply, and contributes to significant reduction of gas energy by supplying the optimum gas quantity. Becomes a prediction.

Claims (6)

In the gas range which controls the flow rate of combustion gas by a microcomputer program, Safety blocking means (400) for maintaining an open state of a flow path of gas introduced into the gas range by the magnetic force of the solenoid (70); A control means (200) consisting of a base (20) set differently according to a rotation angle of the flow path, and a control plate (30) which is in close contact with the base (20) and relatively rotates to control the flow rate; A rotational force transmission means (100) composed of a stepping motor (10) and a drive shaft (13) to transmit the rotational force to the adjustment means (200); Gas flow rate control for a gas range comprising a lift means 300 for opening the safety shut-off means 400 by converting a portion of the turning force generated by the rotational force transmitting means 100 into a linear motion to operate up and down. Device and method The method of claim 1, The throttle plate 30 is; Characterized in that the cross-shaped projection 32 is formed on the upper side, The drive shaft (13); Characterized in that the cruciform hole 17 is formed in the lower portion, the cross-flow projection is inserted into the cruciform hole to rotate the gas flow gas flow control device and method, characterized in that the transfer force is transmitted. The method of claim 1, The lift means 300 is; Gas flow control for the gas range, characterized in that the lifter 40 and the control plate 30 is operated and is carried upward by the first spring, in close contact with the high-tight sealing surface 27 of the base 20 Device and method The method of claim 1, The base 20; Gas flow rate control device for a gas range, characterized in that the high-tight sealing surface 27 formed in the lower portion, the adjusting groove 26 and the control through hole (26a) having a different cross-sectional area on the sealing surface 27 is formed on the same circumference; Way The method of claim 1, Driving the rotational force transmission means (100) to move the lift means (300) and the safety cutoff means (400) to open the flow path; Adjusting the flow rate by rotating the control plate 30 in a designated rotation section; Gas flow rate control device and method for a gas range, characterized in that the flow rate adjustment operation is performed in three steps, such as closing the flow path by blocking the adsorption holding current The method of claim 5, When the lift means 300 operates to lift the safety shutoff means 400, the adjustment groove 26 and the adjustment hole 26a of the adjustment means 200 are closed by the rotational sealing surface 31. Gas flow rate control device and method for gas range

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