KR0121120B1 - Odor reduction control system for fan heater - Google Patents

Abstract

The control method of reducing odor of a fan heater comprises the steps of: driving a combustion blower at a strong strength after the preheating of a carburettor and the conduction of an electronic pump and driving the combustion blower at an intermediate strength after a predetermined time elapses, thus to complete pre-purge; discharging a pressurized solenoid and an ignition plug to ignite a burner head until a set flame detection value is reached; after the completion of the flame detection, stopping the discharging of the ignition plug and operating a convection fan after a predetermined time of the flame detection to remove the odor at an ignition initial step; and after a predetermined time elapses, stopping the radiation of a preheater to thereby perform a normal operation.

Description

How to control odor reduction of fan heater

1 is an overall system diagram of a general oil fan heater.

2 is an enlarged view showing the main portion of the first portion of the burner in more detail.

3 is a timing diagram of normal operation of the fan heater of FIG.

4 is a timing diagram of the fan heater of FIG. 1 when the restart switch is turned on during the post-purge period after the operation switch is shut off.

5 is a combustion ratio diagram for the oil level presser pressure during driving of each stage of the blower of FIG.

6 is a characteristic diagram of odor generation during ignition of each stage of the first blower.

FIG. 7 is a flowchart illustrating a driving signal of a conventional fan heater applied to FIG.

8 is an operation control and odor reduction control deep flow diagram of the fan heater of the present invention applied to FIG.

9 is a timing diagram of normal operation of the fan heater according to FIG.

10 is an operation timing diagram when the operation switch is turned on again during the post-purge period after the operation switch is shut off according to FIG.

FIG. 11 is an exemplary view showing odor generation characteristics during ignition by the odor reduction driving control of FIG.

Figure 12 is an exemplary view showing the characteristics of odor generated during extinguishing by the odor reduction operation control of FIG.

* Explanation of symbols for the main parts of the drawings

100: fuel supply unit 104: electronic pump

200: combustion unit 201: vaporizer

205: salt detector 206: ignition block

212: burner head 214: combustion chamber

215: ceramic filter 216: convection fan

300: air supply unit 301: combustion blower

The present invention relates to odor reduction of a fan heater, in particular, by oxidizing odor (HC) and harmful exhaust gas generated by mismatched operation of pressurized solenoid and ignition plug and ignition delay of unburned gas during ignition and fire extinguishing in petroleum fan heater. The present invention relates to a method for controlling odor reduction of a fan heater to minimize odor.

In general, the petroleum fan heater includes a fuel supply unit 110 for supplying fuel through a fuel receiving tank 102 and an oil supply pipe 103 with fuel stored in a cartridge tank 101 largely, as shown in FIG. The combustion unit 200 is configured to vaporize and burn the fuel supplied from the fuel supply unit 100, and an air supply unit 300 to supply air to the combustion unit 200.

That is, the fuel supply unit 100, which is the pressurized fuel supply device, has an electronic pump 104 for blocking and supplying the fuel supplied from the oil supply pipe 103, and the oil level of the fuel supplied through the electronic pump 104 is fixed. It is composed of an oil level machine 105 and a pipe orifice 106 which is positioned at an inner position of the oil level machine 105 to supply fuel to the combustion unit 200.

The air supply unit 300 sucks the outside air and blows the air to the fuel supply unit 100 and the combustion unit 200 through the air blowing path 303 and the air inhaled by the air blower 301. It consists of an air filter 302 for filtering air and a rotation detector 304 for detecting the rotation speed of the blower 301.

In addition, the combustion unit 200 is a pressurized solenoid 210 for supplying and blocking the air flowing through the blowing path 303 to the fuel supply unit 100, and the air supplied by the pressurized solenoid 210 A pressurized tube 213 for pressurizing the fuel of the furnace fuel supply unit 100, a needle 203 installed at an end of the pipe orifice 106 of the fuel supply unit 100, and for injecting pressurized fuel; A vaporizer 201 for vaporizing the fuel injected from these 203, a preheat heater 211 for inserting and depressurizing the vaporized gas in place of the vaporizer 201, and preheating the gas vaporized by the vaporizer 201, and the vaporizer A preheating detection thermistor 207 located at the lower portion of the 201 to detect preheating, an ignition flash 206 generating sparks in the gas of the vaporizer 201 preheated by the preheater 211, and A burner head 212 ignited by the ignition flash 206 to generate a flame; Salt detector 205 for detecting the flame generated by the burner head 212, and a cooling tank for forming a reduced pressure in the vaporizer 201 and receiving the air through the cooling tube 209 to cool the vaporizer 201 ( 208 and a combustion chamber 214 mounted on the cooling cylinder 208 to stabilize the flame formed in the burner head 212 and to achieve thermal stability of the entire system through heat shielding by the flame, and to discharge the combustion gas; And a honeycomb-type ceramic filter 215 having an oxidation catalyst material for filtering odors and harmful exhaust gas disposed on the outlet side of the combustion chamber 214 and a fan heater installed on the rear surface of the combustion chamber 214. Convection fan 216 to increase the temperature of the room by blowing the warm air of the combustion chamber 214 evenly to the room for thermal stability of the.

The analog / digital conversion unit 400 converts the values detected by the preheat detection thermistor 207, the salt detector 205, and the rotation detector 304 of the combustion unit 200 and the air supply unit 300 into digital signals. ), A system control unit 401 for controlling the overall operation of the fan heater according to each digital signal changed in the analog / digital conversion unit 400, and an operating voltage generated by the control signal of the system control unit 401 It is composed of a load driving unit 402 for driving each element of the fuel supply unit 100, the combustion unit 200 and the air supply unit 300.

Thus, the operation of the general petroleum fan heater constructed as described with reference to FIGS. 3 to 7 as follows.

First, when the user conducts an operation switch as shown in FIG. 3 to ignite (ST1), the system controller 401 generates an operating voltage through the load driver 402 to preheat heater 211 as shown in FIG. Heats for a predetermined time. (ST2)

When the vaporizer 201 is preheated by the heating of the preheater 211, and the vaporizer 211 is preheated by the preheater 211, the preheat detection thermistor 207 detects the analogue / digital converter. Input to the system control unit 401 as a digital signal through (400).

The system controller 401 compares the preheat temperature detected by the preheat detection thermistor 207 and the analog / digital conversion unit 400 with the set temperature (ST3), and continues if the preheat temperature has not yet reached the set temperature. When the preheating heater 211 is heated to preheat the vaporizer 201 and the preheating temperature reaches the set temperature, the heat generation of the preheating heater 211 is stopped through the load driving unit 402 and the load driving unit 402 is stopped. The operating voltage is generated through the driving fan 301 of the air supply unit 300 and the electron pump 104 of the fuel supply unit 100 as shown in FIG. 3 (ST4).

Combustion air driven by the combustion blower 301 is removed through the combustion air filter 302 to remove dirt and dust in the intake air, and then blow air for about 20 to 30 seconds before ignition with clean air. The furnace 303 and the nozzle 204 are introduced into the carburetor 201 and pre-purged for seven hours in the seventh stage of the strong operation among the blower stages of FIGS. 5 and 6 (5), and fuel The electron pump 104 of the supply unit 100 supplies the fuel flowing through the fuel receiving tank 102 and the oil feed pipe 103 to the oil level machine 105 to maintain a constant oil level at all times.

Thereafter, as shown in FIG. 3, when the pre-purge is completed (ST6), the system control unit 401 energizes the pressure solenoid 210 through the load driving unit 402 (ST7) gradually as shown in FIG. Pressure to maintain a normal pressing force of 38 mmAg.

The fuel pressurized by the oil leveler 105 is supplied to the vaporizer 201 of the combustion unit 200 through the pipe orifice 106 and the needle 203.

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

The vaporized gas is mixed with the air supplied through the nozzle 204 and exhausted through the burner head 212.

At this time, the spark is generated by the spark generated from the ignition flash 206 of the high-pressure discharge ignition device, that is, the spark is ignited by the discharge of the ignition flash 206 1-2 seconds after the energization of the pressure solenoid 210 to form a spark ( ST8) (ST9).

When the ignition is performed in this manner, the flame detector 205 detects that a spark is formed in the early stage of ignition, converts it into a digital signal through the analog / digital conversion unit 400, and inputs it to the system controller 401. The system unit 401 compares the salt level detection signal detected by the salt detector 205 with the flame detection salt reference value, and judges that the fan heater is abnormal when it is below a certain level, and extinguishes it to a salt detection under normal conditions. Judgment (ST10) stops the discharge of the ignition plug 206 and operates the convection fan 21 as shown in FIG. 3 (ST11). After that, when a predetermined time (usually about 10 minutes) is hardened, the operation of the preheating heater 211 is stopped (ST12), and the rotation speed of the combustion blower 301 is controlled according to the operating condition step set by the user. The rotational speed of the combustion blower 301 is sensed by the rotation sensor 304 and the analog / digital conversion unit 400 to maintain the rotational speed of the combustion blower 301 constant, and also the combustion blower 301. The oil pressure of the oil leveling machine 105 to form the normal flame stabilized under normal combustion conditions according to the number of revolutions is automatically determined by the inherent characteristics of the blower 301 for combustion. It controls the amount of heat generated according to the setting operation condition and performs normal combustion (ST13).

On the other hand, when the user stops the operation as shown in FIG. 3, when the operation switch is turned off (ST14) (ST14), the system control unit 401 is operated in the multi-stage operation fire extinguishing mode (ST15).

In the multi-stage operation fire extinguishing mode, as in FIGS. 5 and 6, the operation stage of the combustion blower 301 is gradually reduced to reduce the pressing force of the oil level machine 106.

When the multi-stage operation fire is completed in this way, that is, when the number of operating stages of the combustion blower 301 of the combustion unit 200 reaches the first stage, the electronic pump 104 and the combustion blower 301 of the fuel supply unit 100 become the lowest. ) And the pressure solenoid 210 is stopped at the same time (ST17) to extinguish the flame of the burner head 212 (ST18).

At this time, as shown in FIG. 3, the convection fan 216 of the combustion unit 200 continuously performs post purge (strong driving) for a predetermined time even after the operation switch is shut off (ST19). In addition to discharging the residual unburned gas inside the combustion chamber 214 into the room through the ceramic filter 215, the combustion chamber 214 and the ceramic filter 215, which are already heated after extinguishing and have a considerably high temperature, are rapidly cooled. Let's go.

Thereafter, when the strong driving time is completed (20), the driving of the convection fan 216 is stopped (ST21).

On the other hand, if the user turns on the operation switch again as shown in FIG. 4 during the multi-stage fire extinguishing mode and the strong driving period of the convection fan 216 after the operation switch is shut off (ST23), the system controller 401 immediately loads the driving unit Through operation 402, the operation of the electronic pump 104, the combustion blower 301, and the pressurized solenoid 210 is stopped (ST24) to extinguish the flame of the burner head 212 (ST25), and FIG. While operating in the same normal operation mode, the convection fan 216 of the combustion unit 200 continues the strong operation after the operation switch is blocked, as shown in FIG. 4 (ST26), and the combustion chamber 214 and the ceramic filter 215 It is rapidly cooled, and also continues to operate even when re-ignition of the carburetor 201 by the operation of the re-switch switch conduction and re-ignition after the completion of the strong operation not only adversely affect the ignition performance, but also the odor and harmful exhaust gas during ignition Cause.

On the other hand, when re-ignition and flame detection by the conduction of the re-operation switch is completed, the process after the above-described step (ST10) is repeated.

However, in the conventional method of operating a petroleum fan heater, the unburned gas discharged through the burner head is discharged by causing the start point of the operation of the pressurized solenoid of the combustion unit to be opened about 1-2 seconds before the start of the ignition flash discharge. Since it is not ignited and released in a large amount, it is the main cause of indoor pollutant caused by odor and harmful exhaust gas.In addition, when the ignition pressure is high, the operating stage of the combustion blower is ignited in seven stages. In addition, large amounts of unburned gas are released by the ignition delay around the burner head at the time of ignition by discharge of the ignition plug, and after the flame is detected by the salt detector, the convection fan is operated to simultaneously operate the convection fan. The main cause of odor generation and air pollution due to insufficient reaction with oxidation catalyst materials It was.

In addition, after the operation switch is shut off, the electronic pump, the combustion blower, and the pressurized solenoid are stopped at the same time, and at the same time, the convection fan is continuously operated to discharge quickly into the room by strong driving, and burner head due to the strong operation of the convection fan. Unburned gas remaining in the carburettor is not discharged through the combustion chamber, but flows back to the combustion blower and is discharged to the room through the blower path and the combustion air filter, and the convection fan continues to operate when the operation switch is shut off. When the operation switch is turned on again, the preheating test of the carburetor is completed and re-ignition ignition occurs, but the convection fan continues to operate even when ignition, and continues to operate even when ignition by the discharge of the ignition block, which deteriorates the ignition condition by ignition. There was also a problem that the filter is also continuously cooled to lose its function.

Therefore, in view of the conventional problems, the present invention lowers the number of operating stages of the combustion blower for ignition during ignition, and simultaneously performs the pressurized solenoid and the ignition floc discharge, while simultaneously detecting the operation of the convection fan and performing the flame detection for a predetermined time. Method to control odor reduction of fan heater to operate after elapsed to suppress generation of unburned gas and harmful exhaust gas due to ignition delay and to heat ceramic filter with ignition heat during ignition to reduce odor generated and ignited during ignition. In providing.

Still another object of the present invention is to stop the operation of the electronic pump, the pressurized solenoid, the combustion blower at a predetermined interval after the operation switch is shut off during fire extinguishing, and to stop the convection fan before and after the multi-stage extinguishing, completely extinguishing the unburned gas from the ceramic filter. By oxidizing to suppress the odor generated and extinguished during digestion.

As a method for achieving the object of the present invention, the step of driving the combustion blower during the pre-purge period during ignition and performing a heavy operation before ignition after a predetermined time to complete the pre-purge, and the pre- After purging, pressurizing the solenoid and discharging the ignition flash at the same time to ignite the burner head until the set flame detection value is reached; and after completion of the salt detection, the discharge of the ignition flash is stopped and the convection fan of the combustion unit is flame detected. Operate after a certain period of time to remove the initial ignition and stop the heating of the preheater after a certain period of time to perform normal operation, and if the operation switch is shut off during the normal operation, the electronic pump, pressurized solenoid, combustion blower And extinguishing the convection fan at regular time intervals to extinguish it into multiple stages. If the restart switch is turned on during operation, the operation of the electronic pump, the solenoid and the combustion blower is stopped to extinguish and the preheating heater is heated to preheat the carburetor, and after the completion of the preheating, the electronic pump and the combustion blower are strong. After the operation, after a certain period of time to perform a pre-purge until the ignition while supplying fuel and air to the combustion unit, and after the completion of the pre-purging, the operation of the convection fan is stopped before a certain time of energization of the pressurized solenoid It is achieved by performing a step of repeating the process after the purge completion step, will be described in detail with reference to the accompanying drawings of the present invention as follows.

FIG. 8 is a flow chart of the operation control and odor reduction control signal of the fan heater of the present invention applied to FIG. 1. As shown in FIG. 8, the preheating heater 211 of the carburetor 201 is heated when the operation switch is turned on. Preheating the vaporizer 201 until it reaches a predetermined temperature (ST2) (ST3), and when the vaporizer 201 reaches a predetermined temperature and preheating is completed, the electronic pump 104 is turned on and the combustion is performed. Initially, the blower is driven in a heavy manner after a predetermined time, and performs heavy prepurge until the ignition while supplying fuel and air to the combustion unit 200 (ST4-ST7), and after the completion of the prepurge, the combustion unit Conducting the energization of the pressurized solenoid 210 and the discharge of the ignition plug 206 at the same time to ignite the burner head 212 until reaching a set salt detection value (ST8-ST10), and the salt detection is completed. The discharge of the ignition floc 206 and focuses on the convection fan 216 of the combustion unit 200. After the flame detection is completed after a certain time to operate to remove the initial ignition ignition and after a certain time to stop the heating of the preheating heater 211 to perform the normal operation according to the operating conditions set by the user (ST11-ST14), When the operation switch is cut off by the user during the normal operation, the operation of the electronic pump 104, the pressure solenoid 210 and the convection fan 216 are sequentially stopped after a certain time after the operation switch is cut off in order to operate in the multi-stage fire extinguishing mode. And driving only the combustion blower 301 for a predetermined time after the operation switch is cut off (ST15-ST19) and stopping the operation of the combustion blower 301 after the operation switch is cut off for a predetermined time. Cooling the combustion chamber 214 and the ceramic filter 215 rapidly by driving the convection fan 216 for a predetermined time after the operation stop of the blower 301 is stopped (ST20-ST24); If the restart switch is turned on during the multi-stage extinguishing mode and the strong driving period after the switch is shut off, the operation of the electronic pump 104, the combustion blower 301, and the pressurized solenoid 210 is stopped to extinguish, and the convection fan 216 is preheated. Preheating the vaporizer 201 by driving the heater 211 (ST25-ST30), and when the preheating is completed, operates the combustion blower 301 and the electronic pump 104, and the combustion blower 301 In the initial stage of heavy driving, after a predetermined time, the heavy operation is performed to supply fuel and air to the combustion unit 200 to perform prepurge until ignition (ST31-ST34), and after completion of the prepurge, ointment unit Stopping the operation of the convection fan 216 before a predetermined time of energization of the pressurized solenoid 210 of 200 and repeating the process after the pre-purging step (ST7) (ST35), which is shown in the figure The same reference numerals are given to the same parts as those described in the following.

Thus, the operation and effect of the present invention made in detail with reference to FIGS. 8 to 12 as follows.

In the method for controlling the odor reduction of the fan heater of the present invention, since the technical configuration of the apparatus is the same as in the prior art, the description thereof will be omitted, and only the method of reducing the odor during the ignition and extinguishing of the fan heater according to the operation procedure of the present invention will be described.

First, when the user conducts an operation switch as shown in FIG. 9 to ignite (ST1), the system control unit 401 generates an operating voltage through the load driving unit 401 as shown in FIG. 9, the combustion unit 200. The preheating heater 211 is heated for a predetermined time (ST2).

When the vaporizer 201 is preheated by the heating of the preheater 211, and the vaporizer 211 is preheated by the preheater 211, the preheat detection thermistor 207 detects the analogue / digital converter. Input to the system control unit 401 as a digital signal through (400).

The system controller 401 compares the preheat temperature detected by the preheat detection thermistor 207 and the analog / digital conversion unit 400 with the set temperature (ST3), and continues if the preheat temperature has not yet reached the set temperature. When the preheater 211 is heated to preheat the vaporizer 201, and the preheating temperature reaches the set temperature, the preheater 211 is stopped by the load driver 402 and the load driver 402 is stopped. The operating voltage is generated through the air blower 301 of the air supply unit 300 and the electronic pump 104 of the fuel supply unit 100 at the same time as shown in FIG. 9 (ST4).

Combustion air driven by the combustion blower 301 is removed through the combustion air filter 302 to remove dirt and dust in the intake air, and then blow air for about 20 to 30 seconds before ignition with clean air. It is introduced into the vaporizer 201 through the furnace 303 and the nozzle 204, and prepurge is performed. In the initial stage of the prepurge period, the first stage prepurge is used for the combustion of FIGS. The operation stage of the blower blower 301, which is the intermediate operation until the ignition by the discharge of the ignition flash 206 by the two-stage pre-purage, is followed by the strong operation pre-purge to the seven stages of the blower operation stage. It is pre-purged in stages (ST6), so that the operation stage for combustion with a small odor (HC) generation due to the ignition delay at the ignition point is ignited in four stages, and the electronic pump 104 of the fuel supply unit 100 ) Is introduced through the fuel tank (102) and the oil pipe (103) Supplying a charge to the refinery myeongi 105 to thereby always maintain a constant oil level.

When the pre-purge is completed in this manner (ST7), the system control unit 401 simultaneously conducts the energization of the pressure solenoid 210 and discharges the ignition plug 206 through the load driving unit 402 as shown in FIG. (ST8) minimizes the initial ignition of ignition.

The clean air sucked by the combustion blower 301 and the air filter 302 according to the energization of the pressure solenoid 210 pressurizes the oil level of the oil level machine 105 through the pressure tube 213.

The fuel pressurized by the oil level machine 105 is supplied to the vaporizer 201 of the combustion unit 200 through the pipe orifice 106.

The filter material supplied to the vaporizer 201 is first atomized by the air injected from the nozzle 204, and at the same time is vaporized by the temperature of the vaporizer 201 preheated.

The vaporized gas is mixed with the air supplied through the nozzle 204 and exhausted through the burner head 212.

At this time, the sparks are generated by the spark generated from the ignition flash 206 of the high-pressure discharge auto-ignition device to form a spark (ST9).

When the ignition is performed in this manner, the flame detector 205 detects that a spark is formed in the early stage of ignition, converts it into a digital signal through the analog / digital conversion unit 400, and inputs it to the system controller 401. The system control unit 401 compares the salt detection signal detected by the salt detector 205 with the set flame detection salt reference value and continues to detect if it is below a certain level, and if it is abnormal, determines that the salt detection under normal conditions is complete (ST10). The discharge of the 206 is stopped (ST11), and as shown in FIG. 9, the convection fan 216 of the combustion unit 200 is operated (ST12) after a predetermined time Ta has passed after the salt detection completion (ST10). The ceramic filter 215 mounted at the outlet of the combustion chamber 214 of the 200 is instantaneously heated as the ignition combustion heat of ignition to sufficiently oxidize the odor (HC) component generated during the initial ignition, and then operates the convection fan 216. , Ignition initial odor (HC) Examples thereby greatly reduced, as shown in.

After that, after a certain time elapses, the operation of the preheating heater 211 is stopped (ST13) and the normal operation is performed according to the operating condition set by the user (ST14).

On the other hand, when the user stops the operation as shown in FIG. 9, when the operation switch is turned off (ST15), the system control unit 401 operates in the multi-stage operation extinguishing mode (ST16).

In the multi-stage operation fire extinguishing mode, as shown in FIGS. 5 and 6, the operation stage of the combustion blower 301 is gradually reduced to reduce the pressure of the oil leveler 106.

When the multi-stage operation fire extinguish is completed in this way, that is, when the operating stage of the combustion blower 301 of the combustion unit 200 becomes the optimum one stage, the electronic pump 104 after the operation switch is normally shut off after a predetermined time Td. The combustion blower 301 and the pressurized solenoid 210 are stopped at the same time to extinguish the flame of the burner head 212. However, in the present invention, as shown in FIG. 9, after the operation switch is shut off and a predetermined time Tb has elapsed. The operation of the electronic pump 104 is first stopped (ST17), and after a certain time (Tc) has elapsed, the pressure solenoid 210 is closed and the convection fan 216 is stopped before completion of the multistage digestion. (ST18) When the multistage extinguishing is completed, the flame is not adversely affected, and the combustion ceramic filter 215 mounted at the outlet of the combustion chamber 214 of the combustion unit 200 is not cooled, thereby generating the multistage miniaturization. The unburned gas of the odor (HC) is removed.

On the other hand, the combustion blower 301 of the air supply unit 300 continues to operate, i.e., as shown in FIG. 9, even after the predetermined time Td has elapsed (ST19). The unburned gas remaining in the vaporizer 201 of the combustion unit 200 after the multi-stage digestion and discharged toward the combustion blower 301 of the air supply unit 300 is mounted on the upper part of the combustion chamber 214. After extinguishing, it is discharged to the heated ceramic filter 215 and completely oxidized in the ceramic filter 215, thereby completely eliminating the odor remaining in the vaporizer 201 during the extinguishing.

When the predetermined time Te has elapsed, the operation of the combustion blower 301 is stopped (ST20), and the convection fan until the predetermined time Tf elapses after the operation of the combustion blower 301 is stopped. 216 continues to stop so that the ceramic filter 215 completely oxidizes and removes unburned gas generated and discharged after digestion.

After that, in order to thermally stabilize the fan heater by thermal dissipation of the ceramic filter 215 and post purge, the convection fan 216 performs a strong driving after a predetermined time (Tf) after the combustion blower 301 has stopped operating ( The heat of combustion of ST21 (ST22) rapidly cools the combustion chamber 214 and the ceramic filter 215 whose temperature is considerably high.

Thereafter, when the strong driving time is completed (ST23), the driving of the convection fan 216 is stopped (ST24).

On the other hand, when the user switches the operation switch on again (ST25) during the multi-stage fire extinguishing mode and post-purge (strong driving) period of the convection fan 216 after the operation switch is shut off (ST25), the system control unit ( 401 immediately stops the operation of the electronic pump 104, the combustion blower 301 and the pressure solenoid 210 through the load driving unit (402) (ST26) to extinguish the flame of the burner head 212 (ST27) However, the convection fan 216 of the combustion unit 200 continues to operate in a strong manner after the operation switch is shut off (ST28) as shown in FIG. 10 (ST28). And the ceramic filter 215 is rapidly cooled, and further, the preheating completion (ST29) (ST30) of the vaporizer 201 and the first and second stage prepurge completion (ST31-ST34) of the vaporizer 201 are carried out by the reactivation switch conduction. As in the example of FIG. 10 of the pressurized solenoid 210, the operation of the convection fan 216 is stopped before a predetermined time Tg. Chuge to (ST35) even when the convection fan 216 to prevent re-ignition of the ignition is not adversely affected by the steel operation steel driving period is suppressed as much as possible the odor generated during ignition.

On the other hand, when the re-ignition and salt detection by the re-operation switch conduction is completed, the above-described process after the completion of the salt detection is repeated.

As described in detail above, according to the present invention, the ignition of the combustion blower is lowered and ignited during ignition, and the energizing and discharging of the pressurized solenoid and the ignition flash are simultaneously performed, and after the detection of the operation of the convection fan is completed. By operating after a certain period of time, not only does it lower the generation of odor unburned gas and harmful exhaust gas due to ignition delay during ignition, but also heats the ceramic filter with ignition heat during ignition to reduce odor generated and discharged during ignition to the maximum. In addition, after the operation switch is shut off during the extinguishing, the operation of the electronic pump, the pressurized solenoid and the blower for the combustion is stopped at a predetermined interval, and the convection fan is stopped before and after the multi-stage extinguishing, thereby heating the unburned gas generated by the combustion heat by the heat of combustion. Fully oxidized in the ceramic filter to minimize odor When the switch is turned on during the post purge period of the convection fan after the operation switch is shut off, the electronic pump, pressurized solenoid and combustion blower stops and the convection fan is shut off after the operation switch is shut off. The post purge is continued to ensure the thermal stability of the entire system.The carburettor is preheated by the conduction of the restart switch and the first and second stages of prepurge are completed, that is, the convection fan is stopped and the dye detection is completed before energizing the pressurized solenoid. By performing the post-operation, there is an effect that the odor can be suppressed as much as possible during ignition due to the re-operation switch conduction during the post purge period.

Claims (7)

After the preheating of the carburetor and the electric pump is energized, the combustion blower is strongly driven, and after a predetermined time, the heavy blower is completed to complete the prepurge and the discharge of the pressurized solenoid and the ignition plug at the same time. Igniting the head until the set flame detection value is reached; and stopping the discharge of the ignition flash after completion of the salt detection, and operating the convection fan after a certain time after the completion of the salt detection to remove the initial ignition of the ignition. How to control the smell of the fan heater, characterized in that the step of performing a normal operation by stopping the heating of the. The method of claim 1, further comprising: stopping and extinguishing the electronic pump, the pressurized solenoid, the convection fan, and the combustion blower at a predetermined time interval when the operation switch is cut off during the normal operation. Odor reduction control method of the fan heater characterized in that. The method according to claim 2, wherein the combustion blower is continuously operated for a predetermined time after the completion of extinguishing, and the odor remaining in the vaporizer is discharged and removed by the ceramic filter for combustion. 3. The method for controlling the odor reduction of a fan heater according to claim 2, wherein the operation of the fan heater is stopped before and after the convection fan is finished extinguishing. The method of claim 2 or 4, wherein if the restart switch is selected during the multi-stage extinguishing mode and the strong operation period of the convection fan after the operation switch is shut off, the operation of the electric pump, the pressure solenoid and the combustion blower is stopped to extinguish the preheating heater. Preheating the carburetor by generating heat, and driving the electronic pump and the blower for combustion after the preheating is completed, and after a predetermined period of time, performing prepurge until the ignition while supplying fuel and air to the combustion unit; Stopping the operation of the convection fan after the completion of the pre-purge, and repeating the process after the completion of the pre-purge step further comprises the step of controlling the smell of the fan heater. The method of claim 2, wherein the pressurized solenoid and the convection fan are blocked at the same time after the operation switch is blocked for a predetermined time. The method of claim 5, wherein the stopping of the convection fan after prepurge is completed is performed before a pressurized solenoid is energized for a predetermined time.