KR0147208B1 - Sensing technique and apparatus for abnormal combustion of fanheater - Google Patents

Abstract

The present invention relates to a fan heater, in particular, the filter of the electronic pump due to dust in the air is clogged under abnormal combustion caused by the instability of the flame under normal combustion conditions to detect the external combustion and automatically extinguish the abnormal combustion The present invention relates to a method for detecting abnormal combustion of a fan heater and a device thereof to prevent a malfunction of the fan heater.

The object of the present invention is provided at a predetermined position of the oil level machine, and the level level detection means for detecting the level change level of the oil level machine, and remove the noise of the signal obtained from the fraud oil level level detection means and corresponding digital signal And a system control means for detecting an abnormal combustion of the fan heater in accordance with the signal obtained from the signal processing means, outputting the corresponding alarm and automatically extinguishing the system by controlling the overall operation of the system. It is achieved by providing.

Description

Abnormal combustion detection method of fan heater and its device

1 is an overall configuration diagram of a conventional fan heater.

2 is an enlarged view of portion A of FIG.

3 is a circuit diagram of a combustion control apparatus of a conventional fan heater.

4 is a flowchart illustrating a combustion control of a conventional fan heater.

5 is an explanatory diagram of an operation state determination criterion according to the salt voltage of the microcomputer control unit of FIG.

6 is a characteristic diagram of salt voltage change according to a drop in a well-known water level in a conventional oil phase.

7 is a characteristic diagram showing the level change of the oil level surface level drop according to the opening ratio of the conventional filter filter.

8 is an overall configuration diagram of a fan heater applied to the present invention.

9 is a configuration of the abnormal combustion detection device of the fan heater of the present invention.

10 is a characteristic chart of the oil level level drop determination criteria for oil leveling according to clogging caused by foreign substances in the filter filtration apparatus.

11 is a criterion of filter filter clogging state determination.

12 is an abnormal combustion detection signal flow diagram of the fan heater of the present invention.

* Explanation of symbols for main parts of the drawings

400: system control unit 700: oil level level detection unit

800 signal processing unit

The present invention relates to a fan heater, in particular, the filter of the electronic pump due to dust in the air is clogged under abnormal combustion caused by the instability of the flame under normal combustion conditions to detect the external combustion and automatically extinguish the abnormal combustion The present invention relates to a method for detecting abnormal combustion of a fan heater and a device thereof to prevent a malfunction of the fan heater.

As shown in FIG. 1, a conventional fan heater includes a fuel supply unit 100 supplying fuel stored in a cartridge tank 101 through a fuel receiving tank 102 and an oil supply pipe 103, and the fuel supply unit 100. Combustion unit 200 for vaporizing and burning fuel supplied from the air, an air supply unit 300 for supplying combustion air to the combustion unit 200, and a system control unit 400 for controlling the overall operation of the fan heater system. It is composed of

The fuel supply unit 100 is a filtration device 107 for removing foreign substances such as dust in the fuel supplied from the oil feed pipe 103, the electronic pump 104 for supplying and blocking the supplied fuel, and the electronic pump 104 And an oil level machine 105 for maintaining a constant oil level of the fuel supplied through the fuel cell, and a pipe orifice 106 positioned inside the oil level machine 105 to supply fuel to the combustion unit 200.

In addition, the combustion unit 200 is a solenoid valve 210 for supplying and blocking the air flowing through the blowing path 303, and the pressure tube 213 for pressurizing the fuel with the air supplied through the solenoid valve 210 ), A needle 203 installed at an end of the pipe orifice 106 to supply fuel, and a nozzle for injecting the fuel supplied from the needle 203 into the air through the blowing path 303 ( 204, a vaporizer 201 for vaporizing fuel injected by the nozzle 204, a preheater 211 installed in the vaporizer 201, and a preheater 211 for preheating the vaporizer 201, and the vaporizer 201. A preheating detection thermistor 207 installed at a lower portion of the preliminary sensing unit 207, a burner head 212 which is ignited by the ignition flash 206 to generate a flame, and a salt sword detecting the flame of the burner head 212 Pressure reduction is formed in the keeper 205 and the vaporizer 201 and the air is cooled through the cooling tube 209. It is composed of a cooling cylinder 208 for cooling the vaporizer 201.

3 is a circuit configuration of a fan heater combustion control circuit. In the drawings, the same reference numerals as in FIG. 1 denote the same functions, and 500 is a display unit for displaying an operation state of the fan heater under the control of the system controller 400. 600 represents a system control unit 400 and a power supply unit for supplying operation power to each stage of the system.

Hereinafter, the operation of the conventional fan heater will be described in detail with reference to FIGS. 1 to 4.

First, when the power is supplied to the fan heater through the power supply unit 600, the operation signal is input through the key control unit (not shown in the drawing), and when the user inputs a desired heating temperature, the system controller 400 may burn the combustion unit 200. The preheater 211 in () is driven to preheat the vaporizer 201.

In addition, while preheating the vaporizer 201 through the preheater 211, the temperature of the vaporizer 201 is sensed through the preheat detection thermistor 207.

At this time, when the temperature of the vaporizer 201 sensed by the preheat detection thermistor 207 reaches the preheating completion temperature, the combustion blower 301 of the air supply unit 300 and the electronic pump 104 in the fuel supply unit 100 are driven. . Accordingly, the combustion blower 301 sucks combustion air through the combustion air filter 302, and vaporizes the sucked air through the blowing path 303 and the nozzle 204 for 20 to 30 seconds before ignition. 201) It will flow inside.

The electronic pump 104 in the fuel supply unit 100 supplies the fuel flowing through the fuel receiving tank 102, the oil supply pipe 103, and the filtration device 107 to the oil refinery 105.

The oil level machine 105 causes the fuel to overflow the oil level machine 105 so as to maintain a constant oil level at all times regardless of the fuel consumption corresponding to the driving conditions.

Here, the fuel flowing over the oil level machine 105 is again supplied to the oil level machine 105 via the filtration device 107.

When the prepurge is completed through this process, the system controller 400 opens the pressure solenoid valve 210 by energizing the pressure solenoid valve 201.

Accordingly, the combustion air sucked by the combustion blower 301 pressurizes the oil level of the oil level surface 105 through the pressure tube 213, and the pressurized fuel is pipe orifice 106 and needle 203. It is supplied to the vaporizer 201 through.

The fuel supplied to the vaporizer 201 is first atomized by the air injected from the nozzle 204 and vaporized by preheating the vaporizer 201.

The vaporized gas is mixed with the air supplied through the nozzle 204 and is ejected through the burner head 212. When the gas is ignited by the spark generated by the ignition flash 206 of the high-pressure discharge ignition device, the ignition initial flame The salt is detected through the salt detector 205 and the input is input to the system controller 400.

Accordingly, the system controller 400 compares the flame detection salt reference value set on the basis of the salt voltage determination reference table shown in FIG. 5 with the salt voltage detected by the salt detector 205. Through this, the user is notified of the abnormal condition, and the automatic fire extinguishing immediately.

If there is no abnormality in the detected salt voltage, normal combustion is performed while controlling the number of rotations of the combustion blower 301 according to the operating conditions set by the user while controlling the amount of heat generated according to the room temperature and the set operating conditions.

In addition, when the thermal equilibrium is reached (about 5 to 10 minutes) after ignition, the flame detector 205 compares the indoor oxygen concentration salt voltage detection value with the oxygen concentration salt voltage reference value set as a reference, and if there is no abnormality, the normal combustion operation is continued. When the abnormality occurs, the display unit 500 is extinguished immediately after the indoor ventilation alarm.

However, such a fan heater is equipped with a combustion air filter on the intake side of the combustion air of the combustion blower in order to supply clean combustion air during operation, but such a combustion air filter is about 30 mesh, which is used for large particles in indoor air. Dust can be removed, but fine dust or foreign matter with particle size less than 30 mesh cannot be removed.

Therefore, the combustion air containing the fine dust or foreign matter having the particle size of 30 mesh or less not only injects fuel to the nozzle installed in the carburetor but also sucks the oil surface through the pressurizing tube to pressurize the oil surface for fuel pressure. And mixed with fuel at the same time.

Some of the mixed fuel and foreign matters are supplied to the fuel inside the carburetor, but most of the fuel flows over the oil level plane, and then passes through the filtration device in front of the electron pump to the oil level plane again.

Here, the filtration device uses about 200 mesh filters to prevent shortening of the lifespan caused by foreign substances in the internal parts of the electronic pump. When the device is used for a long time with the air contaminated by the foreign substances, the filtration device at the front of the electronic pump is blocked. .

As a result, the discharge resistance characteristic of the electronic pump is not only lost due to the increase in the suction resistance of the electronic pump, but also shortens the lifespan and the noise of the device due to long-term use of the electronic pump unit.

That is, as shown in FIG. 7 due to the inherent discharge flow characteristics of the electronic pump, the oil level level of the oil level is lowered according to the degree of clogging of the filtration device, so that the equivalent ratio of the normal combustion condition suitable for the user's operating condition setting is not formed. As a result, the fuel supply amount is smaller than the amount of combustion air required for the normal combustion conditions, and as shown in FIG. 6, the flame state causes a lifting phenomenon, resulting in an increase in the combustion noise and an odor generation due to the flame instability.

In addition, as shown in FIG. 7, the lifting phenomenon occurs as the level of oil level is lowered according to the degree of clogging of the filtration device, and the salt voltage decreases due to flame instability. As shown in FIGS. 5 and 6, As shown in Fig. 5, when the oil level and the salt voltage are below 1 mm, the ventilation alarm and the ventilation extinguish due to the lack of oxygen concentration in accordance with the oxygen concentration and the salt voltage determination criteria are performed. Will cause a malfunction.

In other words, in this case, the indoor oxygen concentration was not deficient, but the filtration device of the oil level was blocked by the foreign substance, and even though the flame was unstable, it was recognized as lacking the indoor oxygen concentration, thereby causing a malfunction of ventilation alarm and ventilation.

Accordingly, an object of the present invention is to detect abnormal combustion caused by flame instability under normal combustion conditions due to clogging of the filter of the front end of the electronic pump due to fine dust and the like, and to display it externally and automatically extinguish it according to the abnormal combustion. An object of the present invention is to provide a method for detecting abnormal combustion of a fan heater and a device thereof to prevent a malfunction of the fan heater.

The object of the present invention is provided at a predetermined position of the oil level machine, the oil level level detection means for detecting the level change of the oil level level corresponding to the degree of clogging of the filtration device, and the noise of the signal obtained from the water level level detection means Signal processing means for removing and processing the digital signal corresponding thereto, and detecting abnormal combustion of the fan heater according to the signal obtained from the signal processing means, and sending out an alarm signal and outputting an automatic fire extinguishing signal. This is accomplished by configuring system control means for controlling the fan heater overall system operation.

Another method for achieving the object of the present invention is to detect the flame after ignition to determine the abnormality of the other safety device, and if there is no abnormality of the other stabilizer when the thermal equilibrium reaches the state of the salt voltage And the step of searching for the level of oil level oil level when the salt voltage is lower than the normal value, and the process of performing each alarm and automatic fire extinguishing according to the detected level of oil level level. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

8 is a configuration diagram of a fan heater according to the present invention, and as shown therein, an oil level machine 105 for supplying fuel stored in a cartridge tank through a fuel receiving tank and an oil supply pipe 103, and the oil level machine 105 Combustion unit 200 for vaporizing and burning fuel supplied from the air, an air supply unit 300 for supplying combustion air to the combustion unit 200, and a system control unit 400 for controlling the overall operation of the fan heater system. And a water level level detector 700 provided at a predetermined position in the oil level machine 105 to detect a level change in the oil level of the oil level machine 105 corresponding to the degree of clogging of the filtration device 107, and the oil level. The signal processing unit 800 removes noise of the signal obtained from the water level level detecting unit 700 and processes the signal into a digital signal corresponding to the system control unit 400.

The fuel supply means including the oil leveling machine 105 in the vicinity thereof includes a filtration device 107 for removing foreign substances such as dust in the fuel supplied from the oil pipe 103 and an electronic pump for supplying and blocking the supplied fuel. 104 and a pipe orifice 106 positioned inside the oil level plane 105 to supply fuel to the combustion unit 200.

In addition, the combustion unit 200 is a solenoid valve 210 for supplying and blocking the air flowing through the blowing path 303, and the pressure tube 213 for pressurizing the fuel with the air supplied through the solenoid valve 210 ), A needle 203 installed at an end of the pipe orifice 106 to supply fuel, and a nozzle for injecting the fuel supplied from the needle 203 into the air through the blowing path 303 ( 204, a vaporizer 201 for vaporizing fuel injected by the nozzle 204, a preheater 211 installed in the vaporizer 201, and a preheater 211 for preheating the vaporizer 201, and the vaporizer 201. A preheating detection thermistor 207 installed at a lower portion of the preliminary detection circuit, an ignition flash 206 for generating sparks in the vaporized gas, and a burner head ignited by the ignition flash 206 to generate a flame ( 212, a flame detector 205 for detecting a flame of the burner head 212, and The vaporizer 201 is formed under a reduced pressure and consists of a cooling tube 208 that cools the vaporizer 201 by receiving air through the cooling tube 209.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to FIGS. 8 to 12.

When the power switch is turned on to supply power to the fan heater (S1), the system controller 400 drives the preheat heater 211 of the combustion unit 200 to start preheating to a predetermined temperature (S2), and the preheat heater 211 When the vaporizer 201 is heated by the preheat detection thermistor 207 detects the temperature and inputs it to the system control unit 400.

Accordingly, when the temperature detected by the preheat detection thermistor 207 reaches a predetermined temperature (preheating completion temperature), the system controller 400 determines that the preheating is completed (S3) and the combustion blower 301 of the air supply unit 300. The electronic pump 104 of the fuel supply unit 100 is driven.

Combustion air by the combustion blower 301 is introduced into the vaporizer 201 through the blowing path 303 and the nozzle 204 for about 20 seconds to 30 seconds before ignition through the combustion air filter 302. Pre-purge to remove (S4).

In addition, the fuel of the fuel tank 101 by the driving of the electronic pump 104, the oil refinery tank 102, the oil supply pipe 103, the filter filtration unit 107 and the oil pump after the oil refiner after It is supplied to the 105 to maintain a constant oil level at all times and flows over the oil leveling machine 105.

In this way, the fuel flowing over the oil level machine 105 is flowed back into the oil level machine 105 through the filter filtration device 107 and this process is repeated.

On the other hand, when the pre-purge is completed, the system control unit 400 is energized by the pressure solenoid valve 210 to open the valve.

Accordingly, the combustion air sucked by the combustion blower 301 pressurizes the oil level of the oil level machine 105 through the pressure tube 213, and the pressurized fuel is the pipe orifice 106 and the needle 203. It is supplied to the vaporizer 201 through.

The fuel supplied to the vaporizer 201 is first atomized by the air injected from the nozzle 204 and vaporized by the temperature of the preheated vaporizer 201.

The vaporized gas is mixed with the air supplied through the nozzle 204, exhausted through the burner head 212, and then ignited by sparks generated from the ignition flash 206 of the high-pressure discharge ignition device (S5 to S6). It will form a flame.

At this time, the flame detector 205 detects that the flame is formed in the initial ignition (S7) and inputs a salt voltage corresponding thereto to the system controller 400.

Accordingly, the system controller 400 searches for the abnormality of the other safety device according to the operation state determination criteria of the apparatus according to the salt voltage shown in FIG. 5 (S8).

That is, if there is no abnormality by comparing the salt voltage detected by the salt detector 205 with the set flame reference salt reference value, the rotation of the combustion blower 301 according to the operating condition (meaning the temperature) set by the user and the room atmosphere temperature is achieved. Normal operation is performed while controlling the number (S11).

At this time, the system controller 400 continuously detects the salt voltage at regular time intervals, and compares whether the salt voltage is equal to or greater than the normal operating condition based on the same criterion as the fifth degree, and if there is no abnormality, the system controller 400 continues to operate normally.

In addition, when the salt voltage is below the normal condition, the oil level level is detected through the oil level level detector 700 that detects a change in the water level of the oil level device 105.

The signal corresponding to the water level level detected by the water level level detector 700 is converted into a digital signal through the signal processor 800 and input to the system controller 400.

Accordingly, the system controller 400 determines the detected level of water level according to the criterion of FIG. 11 based on the level of water level detected by the level of water level detection unit 700.

That is, if the oil level level detected by the oil level level detection unit 700 is 0∼-1mm or more, it is determined that the salt voltage is reduced due to the flame instability due to the lack of oxygen concentration in the room, and the indoor ventilation alarm (S15) is performed. Output digestive (S16) will be digested immediately.

In addition, if the detected level of water level is less than -1 to -2.5 mm, it is determined that the filter filtration device 107 is blocked by foreign matter, and through the display unit 500, an alarm that the filter filtration device is blocked (S17).

When the filter filtration device is clogged alarm, normal combustion is performed for a predetermined time, and when the filter filtration device continues to be blocked, the discharge flow rate of the electronic pump 104 is decreased, so that the oil level level of the oil leveling machine 105 is reduced. When the water level is less than -2.5 mm in this way, the fire extinguishing alarm along with the blockage of the filter filtration device 107 and the fire extinguishing signal are output for preventing the shortening of the life of the electronic pump 104 and the safety of the fan heater. Extinguish immediately.

10 and 11 are judgment criteria tables and graphs for alarming and extinguishing a system control unit different from clogging of the filter filtration apparatus.

As described in detail above, the present invention can detect the abnormal level of flame corresponding to the degree of clogging of the filter filtration device by dirt by detecting the level of oil level of the oil level machine, which is harmful to flame instability and abnormal combustion. Exhaust gas emissions and odors can be prevented, and combustion noise can be prevented.

In addition, it is possible to recognize the cleaning cycle of the filter filtration device as an alarm in case of abnormal combustion, thereby preventing the occurrence of abnormal combustion, and the filter filtration device is a foreign substance whether the salt voltage drop due to abnormal combustion is indoor oxygen deficiency. It is possible to clearly determine whether it is blocked by the effect that can prevent the malfunction of the equipment during abnormal combustion.

In addition, by performing abnormal alarm and fire extinguishing according to the degree of clogging of the filter filtration device, the suction resistance of the electronic pump and the life of the device can be prevented.

Claims (4)

Water level level detection means for detecting a level change in the oil level level, signal processing means for removing noise of the signal obtained from the water level level detection means and processing the digital signal corresponding thereto and outputting the signal; And a system control means for detecting abnormal combustion of the fan heater in accordance with the signal obtained from the system, and transmitting the corresponding alarm in the event of abnormal combustion and automatically extinguishing the system to control the overall operation of the fan heater. The apparatus for detecting abnormal combustion of a fan heater according to claim 1, wherein the water level level detecting means comprises a water level sensor for detecting the level of water level in the oil level machine. The first process of detecting flame after ignition to determine the abnormality of other safety devices, and the second process of detecting salt voltage when thermal equilibrium is reached when other safety devices are not abnormal and comparing it with the reference salt voltage under normal conditions. And a third process of searching for the level of the oil level oil level detected when the detected salt voltage is lower than the reference salt voltage, and a fourth process of performing a corresponding alarm and extinguishing according to the searched level of the oil level level. Abnormal combustion detection method of a fan heater, characterized in that made of. 4. The method of claim 3, wherein the fourth process comprises the steps of: detecting the oil level surface level, generating and automatically extinguishing the indoor ventilation alarm when the level surface level is 0 to 1 mm or more; If the water level is between -1 and -2.5 mm, generate a filter filtration clogging alarm, perform normal operation for a predetermined time, and redetect the level of the water level; and the level of the water level detected again is less than -2.5 mm. In the case of abnormal combustion detection method of the fan heater, characterized in that the step of generating a fire alarm and automatic extinguishing according to the clogging of the filter filtration device.