KR20190048362A - Device for preventing influxed noise by igniter in gas range - Google Patents

Abstract

The present invention relates to an apparatus for preventing noise from being introduced, which is generated by an ignition apparatus for a gas range, which is able to, while a spark is being discharged for ignition, automatically disconnects a micro control unit from a flame detection device in terms of circuitry and to remove an inflow of noise itself. According to the present invention, the apparatus for preventing noise from being introduced comprises: an ignition switch (100) which, when operated to be at an ignition position, requests for an ignition of gas; an ignition apparatus (400) which discharges spark to ignite to allow gas supplied to a burner to be burned; the flame detection device (500) which detects flame and generates flame detection information; a ground connection chassis (610) installed on a chassis (600), which is a housing forming a gas instrument, to serve as a ground for ground connection; a micro control unit (MCU)(700) which, when the ignition switch (100) requests for ignition of gas, controls to ignite the ignition apparatus (400); and a switching unit (800) which connects or disconnects the flame detection device (500) to or from the MCU (700). The MCU (700) controls to allow the switching unit (800) to be disconnected while the ignition apparatus (400) is discharging spark for ignition to, when the ignition apparatus (400) discharges spark, allow noise to be induced only towards the ground connection chassis (610).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device for preventing noise inflow caused by an ignition device of a gas appliance,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for preventing noise in a gas appliance, and more particularly to an apparatus for preventing a noise from being generated by a gas appliance ignition apparatus.

A gas appliance that achieves the desired result through the combustion of gas, such as a gas range that heats food by heating the food to be heated and can be ingested, or a gas boiler that heats water by burning gas, (Igniter).

Here, the ignition device is a member for discharging the spark so that the gas can be burnt, and the conventional gas device is equipped with a dewatering device for detecting whether or not the gas is burned, that is, whether or not a flame is generated.

FIG. 1 is a schematic block diagram showing a conventional gas appliance provided with a sludge locator.

As shown in FIG. 1, the conventional gas apparatus equipped with a sludge locator includes an igniter 10 for discharging sparks and igniting a gas supplied to a burner (not shown) Which controls the amount of gas supplied to the burner based on the flame detection information input from the salt detection element 20 and the salt detection element 20 for generating flame detection information for guiding whether or not the flame has been ignited, And a control unit (MCU) 30.

On the other hand, in the gas appliance provided with the conventional sludge scrubbers, as described above, the spark is discharged in the ignition device 10 so that the gas supplied to the burner can be burned, so that noise (leakage electricity) is generated.

As described above, when the generated noise flows into the circuit component constituting the micro control unit (MCU) 30, there is a malfunction or even severe damage.

Therefore, the chassis 40 is provided with the ground chassis 50 so that the chassis 40, which is the housing constituting the gas mechanism provided with the conventional detector, can be utilized as a ground for grounding.

However, in the case of a conventional gas apparatus provided with a lean sump locator, no noise is passed through the ground chassis 50 provided to prevent noise from flowing into the micro control unit (MCU) 30, And also to the salt detecting element 20 which is metallically connected with the salt detecting element 20.

Therefore, in the conventional gas apparatus equipped with the sludge locator, when the noise is introduced into the salt detection element 20, the incoming noise passes through the micro control unit MCU 30 so that the risk of malfunction or breakage of the micro control unit (MCU) 30 can not be completely solved.

KR 20-1998-059068 U

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for automatically disconnecting a microcontroller and a salt detecting element during discharging of a spark for ignition, Which is generated by an ignition device of a gas appliance which is provided with a noise suppressing device.

Technical Solution In order to accomplish the object of the present invention, there is provided an apparatus for preventing inflow of noise generated in an ignition device of a gas appliance of the present invention, comprising: an ignition switch for requesting ignition of a gas when operated in an ignition position; An ignition device for discharging the spark to ignite the gas supplied to the burner so as to burn; A salt detection element for detecting flame and generating flame detection information for guiding whether or not a gas is ignited; A ground chassis mounted on a chassis which is a housing constituting the gas mechanism and performing a grounding function for grounding; And a micro control unit for controlling the ignition device to ignite when ignition of the gas is requested from the ignition switch, the apparatus comprising: a microcomputer control unit for connecting the microcomputer unit with the microcomputer control unit Wherein the micro control unit controls the switching unit to be disconnected while the ignition device discharges the spark for ignition so that noises generated upon discharging the spark in the ignition device are discharged to the ground And is guided only toward the chassis.

According to the first embodiment, the micro control unit controls the switching unit to be disconnected during an ignition operation reference time (RT), which is a time during which the ignition apparatus discharges a spark for ignition, and the ignition operation reference time RT Is the time during which the ignition is completed at the maximum operating voltage (MV) supplied to operate the ignition device.

According to the second embodiment, the micro control unit controls the switching unit to be disconnected during the ignition operation measurement time (MT), which is the time during which the ignition device discharges the spark for ignition, and the ignition operation measurement time ) Is the time during which the ignition is completed from the initial operating voltage (PV), which is a value obtained by measuring the voltage supplied to the ignition device at the time of requesting ignition of the gas from the ignition switch,

(Where MV is the maximum operating voltage supplied to operate the ignition device,

RT is the time during which the ignition is completed at the maximum operating voltage (MV) of the ignition device)

Is calculated by the following equation.

Wherein the micro control unit reads the flame detection information of the lean sludge checker in a state in which the discharge is stopped and the switching unit is controlled to be connected to the ignition device after a lapse of a period of time during which the ignition device discharges the spark for ignition, The total discharge time (UT) of the ignition device in which the ignition device discharges the spark for ignition is calculated as the total time during which the ignition device discharges the spark for ignition Is less than the maximum ignition allowable time (LT) set at the maximum, the ignition device is turned off during the ignition device additional discharge time (AT), which is the time for further discharging the ignition device, Respectively.

Wherein the micro control unit controls the ignition device to discharge the spark during the ignition device additional discharge time (AT), and then stops discharging and controls the switch to be connected again so that the flame detection information If the flame is not detected, the ignition device additional discharge time (AT) is accumulated in the ignition device total discharge time (UT) until the flame detection information of the lean detector is input as the detection of the flame, (LT) until the total discharge time (UT) of the ignition device exceeds the maximum ignition waiting time (LT), and when the total ignition device total discharge time (UT) So that the ignition failure message is output through the information output unit.

The micro control unit controls the microcomputer unit according to the third embodiment in such a manner that the microcomputer control unit controls the microcomputer unit so that the initial detection element voltage (TT) during the ignition cooperating temperature voltage reflection time (TT) when the value of the ignition cooperating temperature voltage reflecting time (TV) is not '0' The initial operating voltage (PV), which is a value obtained by measuring the voltage supplied to the ignition device when the ignition is requested, and the time during which the ignition is completed in the initial detection element voltage (TV)

(Where MV is the maximum operating voltage supplied to operate the ignition device, RT is the time during which the ignition is completed at the maximum operating voltage (MV) of the igniter, TC is the time Temperature-voltage conversion reference constant which is a constant proportional to the value)

Is calculated by the following equation.

In the present invention, during the discharge of the spark for ignition of the gas appliance, the circuit between the micro control unit and the salt detecting element is automatically disconnected, thereby preventing the malfunction or damage of the MCU by removing the noise itself. do.

1 is a schematic block diagram showing a conventional gas apparatus equipped with a sludge locator.
2 is a block diagram showing an apparatus for preventing noise from entering the ignition device of the gas appliance of the present invention.
3 is an operational state diagram showing a movement path of noise during ignition through an apparatus for preventing the inflow of noise generated in the ignition device of the gas device of the present invention.
FIG. 4 is a graph showing that the ignition completion time is varied according to the value of the initial salt detecting element voltage in the case of a thermocouple element of a sludge cleaner among constituent devices of the apparatus for preventing the inflow of noise generated in the ignition device of the gas appliance of the present invention .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and an operation of an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4, the noise inflow preventing device generated by the ignition device of the gas device includes an ignition switch 100, a thermal power control switch 200, a gas supply amount control valve 300, an ignition device Igniter (400), a salt detection element (500), a chassis (600), a ground chassis (610), a switching part (800) and a micro control unit (MCU)

First, the ignition switch 100 is a member for requesting ignition of the gas when the switch is moved to the ignition position.

The thermal power control switch 200 is a member for requesting the intensity of the thermal power variable depending on the movement position of the switch.

The gas supply amount control valve 300 is controlled by a micro control unit (MCU) 700 to be described later, and is a member for regulating the gas flow rate supplied to the burner of the gas mechanism.

The igniter 400 is controlled by a micro control unit (MCU) 700, which will be described later, and is a member for discharging the spark to ignite the gas supplied to the burner (not shown).

The salt detecting element 500 is a member for generating flame detection information for guiding whether or not the gas is ignited.

Particularly, when a thermocouple (TC) element is used as the salt detecting element 500, thermoelectric power that increases in proportion to the heat of the flame generated as the gas is burned is generated.

The chassis 600 is a housing constituting a gas appliance, and is provided with a ground chassis 610 performing a grounding function for grounding.

The switching unit 800 is controlled by a micro control unit (MCU) 700 to be described later and is a member for connecting or disconnecting the salt detection element 500 with a micro control unit (MCU) 700 to be described later.

A relay or a field effect transistor (FET) may be used for the switching unit 800 that performs the function.

The information output unit 900 may be a buzzer, a speaker, a liquid crystal, or a combination thereof as a member for outputting an ignition failure message.

The micro control unit (MCU) 700 is a member that controls the overall operation required for the operation of the gas appliance. In particular, when the ignition of the gas is requested from the ignition switch 100, the ignition device 400 is ignited The noise generated when the spark is discharged in the ignition device 400 is transmitted to the ground chassis 610 only by controlling the switching unit 800 to be disconnected while the ignition device 400 discharges the spark for ignition .

Here, the time during which the switching unit 800 is disconnected while the igniter 400 discharges the spark for ignition varies depending on various conditions.

That is, the time during which the switching unit 800 is disconnected while the ignition apparatus 400 discharges the spark for ignition is largely divided into the ignition operation reference time RT, the ignition operation measurement time MT, (TT), and the like.

First, the ignition operation reference time RT is a time during which the ignition device 400 completes the ignition at the maximum operation voltage MV, and calculates the time when the ignition device 400 of the gas mechanism is the most ideal operation voltage Time, which belongs to a relatively short ignition completion time during the time of the three conditions, while the intensity of the generated noise is large.

Therefore, the micro control unit (MCU) 700 controls itself and the switching unit 800 to be disconnected during the ignition operation reference time RT, so that the noise generated due to the spark discharge in the ignition device 400 Even if a part of the unpassed noise flows into the metal sensing element 500 connected to the ground chassis 610 installed in the micro control unit MCU 700, .

Thus, the microcontrol unit (MCU) 700 is advantageous in that the noise is prevented from flowing into the MCU 700, thereby preventing malfunction or damage.

The ignition operation measurement time MT is a time period during which the ignition device 400 discharges the spark for ignition and more specifically to the ignition device 400 upon request of ignition of the gas from the ignition switch 100 The time during which the ignition is completed with the initial operating voltage (PV), which is a value obtained by measuring the voltage, is calculated as shown in the following equation (1).

In Equation (1), MV is the maximum operating voltage supplied to operate the igniter 400, and RT is the time during which the ignition is completed at the maximum operating voltage MV of the igniter 400.

Here, the ignition operation measurement time MT is varied in proportion to the ignition completion time according to the initial operating voltage PV of the ignition device 400, and the intensity of the generated noise is also proportional.

Accordingly, the microcontroller unit (MCU) 700 controls the ignition device 400 and the switching unit 800 to be disconnected during the ignition operation measurement time MT, so that the noise generated due to the spark discharge in the ignition device 400 Even if a part of the unpassed noise flows into the metal sensing element 500 connected to the ground chassis 610 installed in the micro control unit MCU 700, .

Thus, the microcontrol unit (MCU) 700 is advantageous in that the noise is prevented from flowing into the MCU 700, thereby preventing malfunction or damage.

On the other hand, in the apparatus for preventing the inflow of noise generated in the ignition device of the gas mechanism of the present invention, gas may not be ignited during the ignition operation measurement time (MT) according to various factors.

Therefore, the microcontroller unit (MCU) 700 controls the switching unit 800 to be connected to the salt detecting element 400 (FIG. 5) in a state in which the switching unit 800 is controlled to be connected after the lapse of the time period during which the ignition apparatus 400 discharges the spark for ignition 500 is read out.

If the read flame detection information of the microcontrol unit (MCU) 700 indicates that the flame is not detected, the ignition device total discharge time (UT), which is the total time of discharging the spark for ignition, If the total time during which the device 400 discharges the spark for ignition is less than the maximum allowed ignition standby time LT, the connected switching unit 800 is controlled to be disconnected again.

Thereafter, the microcontrol unit (MCU) 700 further controls the igniter 400 to discharge the spark during the igniter addition time (AT), which is the time for discharging the igniter 400.

The micro control unit (MCU) 700 controls the ignition device 400 to discharge the spark during the ignition device additional discharge time (AT), then stops the discharge, and controls the switching unit 800 to be connected again If the flame detection information of the salt detection element 500 is not a detection result of the flame, the ignition device additional discharge time (AT) is set to the ignition device 500 until the flame detection information of the salt detection element 500 is input as the detected flame It is accumulated in the total discharge time (UT), and repeatedly checked until the accumulated ignition total discharge time (UT) exceeds the maximum ignition standby time (LT).

The micro control unit (MCU) 700 detects the flame detection information of the salt detecting element 500 before the accumulated ignition total discharge time UT exceeds the maximum ignition waiting time LT. The gas appliance ignition is completed.

However, the micro control unit (MCU) 700 outputs an ignition failure message to the information output unit 900 so that the user can recognize when the accumulated ignition device total discharge time (UT) exceeds the maximum ignition standby time (LT) As shown in FIG.

Lastly, the ignition operation temperature voltage reflection time (TT) is the ignition completion time applied when the salt detecting element 500 is specified as a thermocouple (TC) element.

Here, when the salt detecting element 500 is specified as a thermocouple (TC) element, thermoelectric power that increases in proportion to the heat of a flame generated as the gas is burned is generated as described above, As a result, the ignition completion time is variable.

In consideration of this, the microcontroller unit (MCU) 700 controls the initial salt (salt), which is a value obtained by measuring the voltage of the thermocouple (TC) element as the salt detecting element 500 before the ignition device 400 controls to discharge the spark If the value of the detector element voltage TV is not '0', the switching unit 800 is controlled to be disconnected during the ignition cooperating temperature and voltage reflection time TT.

Here, the ignition cooperating temperature and voltage reflection time (TT) is determined by the initial operating voltage (PV), which is a value obtained by measuring a voltage supplied to the ignition device (400) when a gas ignition is requested from the ignition switch (100) The time during which the ignition is completed in the voltage TV is calculated as shown in the following equation (2).

Where MV is the maximum operating voltage supplied to operate the igniter 400, RT is the time during which the ignition is completed at the maximum operating voltage MV of the igniter 400, Is a temperature-voltage conversion reference constant that is a constant proportional to the value of the initial salt detection element voltage (TV).

Here, the ignition operation temperature voltage reflection time TT is influenced by the initial operating voltage PV and the initial detection element voltage TV, and the ignition completion time is variable (see FIG. 4), and the intensity of the noise is also proportional .

Accordingly, the microcontroller unit (MCU) 700 controls the switching unit 800 and the switching unit 800 to be disconnected during the ignition-operation temperature-voltage reflection time TT so that the noise generated by the spark discharge in the ignition device 400 Even if a part of the unpassed noise flows into the metal sensing element 500 connected to the ground chassis 610 provided in the middle chassis 600, the microcontroller MCU 700 ).

Thus, the microcontrol unit (MCU) 700 is advantageous in that the noise is prevented from flowing into the MCU 700, thereby preventing malfunction or damage.

10,400: Ignition device 20,500: Salt detection element
30,700: Micro control unit 40,600: Chassis
50,610: Ground chassis 100: Ignition switch
200: Thermal power control switch 300: Gas supply control valve
800: switching unit 900: information output unit

Claims (6)

An ignition switch (100) for requesting ignition of the gas when operated in an ignition position;
An igniter 400 for discharging the spark and igniting the gas supplied to the burner (not shown) so as to burn;
A salt detection element 500 for detecting flame and generating flame detection information for guiding whether or not a gas is ignited;
A ground chassis 610 installed in the chassis 600, which is a housing constituting the gas appliance, and performing a grounding function for grounding;
A micro control unit (MCU) 700 for controlling the ignition device 400 to be ignited when the ignition switch 100 is requested to ignite the gas, As a result,
And a switching unit 800 connecting or disconnecting the salt sensing element 500 with the micro control unit (MCU) 700,
The microcontroller unit 700 controls the switching unit 800 to be disconnected while the igniter 400 discharges the spark for ignition so that the igniter Wherein the noise is induced only toward the ground chassis (610). The method according to claim 1,
The micro control unit (MCU) 700 controls the switching unit 800 to be disconnected during the ignition operation time RT, which is a time during which the ignition device 400 discharges the spark for ignition, Wherein the ignition operation reference time (RT) is a time during which the ignition device (400) completes the ignition at the maximum operating voltage (MV). The method according to claim 1,
The micro control unit (MCU) 700 controls the switching unit 800 to be disconnected during the ignition operation measurement time (MT) during which the ignition device 400 discharges the spark for ignition, The ignition operation measurement time MT is a time during which ignition is completed from an initial operation voltage PV which is a value obtained by measuring a voltage supplied to the ignition device 400 when a gas ignition is requested from the ignition switch 100, The following equation

(Where MV is the maximum operating voltage supplied to operate the igniter 400 and RT is the time during which the ignition is completed at the maximum operating voltage MV of the igniter 400) The apparatus comprising: an ignition device for igniting a gas; The method according to claim 1,
The salt detecting element 500 is a thermocouple (TC) element,
The micro control unit (MCU) 700 measures an initial salt detection value, which is a value obtained by measuring a voltage of a thermocouple (TC) element as the salt detection element 500 before the ignition device 400 controls to discharge a spark, When the value of the device voltage TV is not '0', the switching unit 800 is controlled to be disconnected during the ignition cooperating temperature and voltage reflection time TT, and the ignition cooperating temperature voltage reflecting time TT is The initial operating voltage PV which is a value obtained by measuring the voltage supplied to the ignition device 400 when the ignition switch 100 is requested to ignite the gas and the time during which the ignition is completed in the initial salt detection device voltage TV , The following equation

(Where MV is the maximum operating voltage supplied to operate the igniter 400, RT is the time during which the ignition is completed at the maximum operating voltage MV of the igniter 400, And a temperature-voltage conversion reference constant that is a constant proportional to the value of the device voltage (TV)). The method according to any one of claims 2 to 4,
The micro control unit (MCU) 700 controls the switching unit 800 to be connected after the elapse of a time period during which the ignition device 400 discharges the spark for ignition, The fire detection information of the ignition device 500 is read and if the read flame detection information indicates that the flame is not detected, the ignition device total discharge time UT, which is a sum of the time period during which the ignition device 400 discharges the spark for ignition, If the total time during which the ignition device 400 discharges the spark for ignition is less than the maximum ignition standby time LT set at the maximum, in a state in which the connected switching part 800 is controlled to be disconnected again, Further comprising means for controlling the ignition device (400) to discharge the spark during an ignition device additional discharge time (AT), which is the time for discharging the ignition device (400) The inflow prevention apparatus. 6. The method of claim 5,
The microcontroller unit MCU 700 controls the igniter 400 to discharge the spark during the ignition device additional discharge time AT and then stops the discharge and controls the switching unit 800 to be connected again If the flame detection information of the salt detection element 500 is not the detection result of the flame, the flame detection information of the salt detection element 500 is input to the ignition device additional discharge time AT) is added to the ignition device total discharge time (UT), and the accumulated ignition device total discharge time (UT) exceeds the maximum ignition standby time (LT), and the integrated ignition device And controls the information output unit (900) to output an ignition failure message so that the user can recognize when the total discharge time (UT) exceeds the maximum ignition waiting time (LT) From Inflow prevention apparatus of the noise that occurs.

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