JPH04138546U - Hot air heater control circuit - Google Patents

Abstract

(57) [Summary] [Purpose] This is to reduce the odor when extinguishing a combustion hot air heater that vaporizes and burns fuel. [Configuration] When extinguishing, according to the amount of combustion before extinguishing mode,
The microcomputer makes the combustion process longer when the amount of combustion is large, and shorter when the amount of combustion is small, with a heat amount smaller than the minimum amount of combustion.
24 to configure the control circuit. [Effect] When extinguishing a fire, the odor at the time of extinguishing can be reduced by continuing combustion with a small amount of combustion for an appropriate time commensurate with the amount of combustion before extinguishing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a control circuit for a hot air heater that vaporizes and burns kerosene, etc. It is.

0002

[Conventional technology]

Conventionally, in hot air heaters that vaporize and burn kerosene, etc., there are no room temperature detection means or room temperature settings. It has a combustion means, a combustion means, and a control means for controlling them. To keep the room temperature more constant, increase the combustion rate from 3200kcal/h to 1000kcal/h, for example. I was adjusting. In addition, for the purpose of reducing odor when combustion is stopped, the combustion amount is reduced to 1000% of the minimum combustion amount. After lowering the temperature to kcal/h and burning it for a certain period of time, the pump was stopped.

0003

[Problem that the idea aims to solve]

Depending on the amount of combustion before the stop operation mode, that is, before the extinguishing mode, the minimum Even if the pump is stopped after constant operation at a combustion rate of 1000kcal/h, the odor cannot be reduced. There are some drawbacks.

0004

[Means to solve the problem]

This invention was made to solve the above problem, and when in fire extinguishing mode, the When burning with a smaller combustion amount than small combustion, combustion according to the combustion amount before extinguishing mode The control means is programmed to vary over time.

[0005]

[Effect]

By configuring it like this, when extinguishing a fire, it is possible to maintain the amount of combustion commensurate with the amount of combustion before the fire extinguishing mode. It is possible to continue combustion for the appropriate time to reduce odor. Do something.

[0006]

【Example】 An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows the control circuit of a warm air heater. In this figure, a commercial power supply 1 is connected to a vaporization section via a triac 2. The preheating heater 3 is connected to the hot air blower 5 via the triac 4, and the pump drive Pump 7 via circuit 6, solenoid 9 via relay contact 8, relay contact The igniter 11 is connected through the terminal 10, and the primary side of the power transformer 12 of the electronic control circuit is connected. It is. A bridge diode 13 is connected to the secondary side of the power transformer 12, On the output side of the bridge diode 13, a smoothing capacitor 14 and a constant voltage IC 15 are connected. The coil of relay 8 is connected to the coil of relay 10 through resistor 16 and transistor 17. is connected through a resistor 18 and a transistor 19. Constant voltage IC15 output On the power side, there is a room temperature detection thermistor 20 and a resistor 21, and a vaporizing section temperature detection thermistor 22 and a resistor. 23, and microcontroller 24 are connected. The microcontroller 24 is equipped with a room temperature thermistor 20. The voltage generated by the vaporizer thermistor 22 and the voltage generated by the vaporizer thermistor 22 are input. Also, the off switch 25, on switch 26, room temperature increase switch 27, and room temperature decrease switch 28 are input and and is connected. Displays the set room temperature in 2 digits and the current room temperature in 2 digits as output 4 Digit number display LED 29, operation lamp 30, triac 2, triac 4, pump It is connected to a drive circuit 6, a relay 8, and a relay 10, respectively.

[0007] The present embodiment having the above configuration will be described.

[0008] FIG. 2 is a timing chart of the control programmed in the microcomputer 24. Kirisu When the switch 25 is pressed, the combustion control means programmed in the microcomputer 24 causes a trial. AC 2 is turned on, the vaporizing section preheater 3 is energized, and the vaporizing section (not shown) is turned on. heat up. Relay 8 is turned on and the solenoid is energized. Solenoid shown Operate the closing rod of the nozzle of the burner part that is not closed to close the nozzle. Relay 10 is on The ceramic heater of the igniter 11 is energized.

[0009] When the vaporizer temperature detection thermistor installed in the vaporizer detects the ignition temperature, , the pump drive circuit 6 operates, and the pump 7 sends fuel to the vaporization section. So Lenoid 7 is turned off, the nozzle in the burner section is opened, and the heat from igniter 11 ignites and burns the flame. Move to grilling. After ignition, the igniter 11 is turned off and the hot air blower 5 is activated to heat the room. Carry out cell driving. The room temperature is controlled by the room temperature increase switch 27 and room temperature decrease switch 28. When the room temperature is set, the room temperature is detected by the room temperature detection thermistor 20, and the temperature matches the setting. The operating frequency of pump 7 is changed depending on the degree difference, and the frequency is changed from 3200kcal/h to 1000kcal/h Combustion is performed with the appropriate amount of heat for the heating load. Hot air blower 5 is also about the same as triac 4. By phase control, it operates with an air volume corresponding to the amount of heat.

0010 Next, the operation of the present invention when extinguishing a fire will be explained.

[0011] When the off switch 25 is pressed, the mode shifts to fire extinguishing mode. Figure 3 shows the flow of operations when extinguishing a fire. A chart diagram is shown. When the microcomputer receives the cut input, the previous combustion amount is 3200, which is strong. At kcal/h, the engine operates for 5 seconds at a combustion rate of 500 kcal/h, and then shifts to stop mode. combustion When the amount is medium, 2560kcal/h, the combustion amount is 500kcal/h for 4 seconds, and the combustion amount is weak, 1700kcal. /h, the combustion amount is 500kcal/h for 3 seconds, and when the combustion amount is small, 1000kcal/h, the combustion amount is 500kcal/h. Run at kcal/h for 2 seconds and then shift to stop mode. The hot air blower 5 is After operating for each time with an air volume commensurate with the above combustion amount of 500 kcal/h, it is stopped. 4 seconds After stopping, apply half-wave voltage to the motor for 2 seconds to apply brakes to the motor. . After 4 seconds, it will operate as a post barge with strong airflow for 40 seconds. Solenoid 9 is pon The nozzle is turned on 2 seconds after the pump 7 is stopped, and the nozzle is closed, and then the current is turned on for 2 minutes.

0012

[Effect of the idea]

As explained above, according to the present invention, when extinguishing a fire, the combustion amount is smaller than the normal minimum combustion amount. Extinguishing by setting the amount of fire and burning for a time commensurate with the amount of combustion before extinguishing mode. It has the effect of reducing the odor caused by fire.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram of a hot air heater showing an embodiment of the present invention.

FIG. 2 is a timing chart diagram of operating modes.

FIG. 3 is a flowchart diagram for extinguishing fire programmed in a microcomputer.

[Explanation of symbols]

24 Microcomputer

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Yasushi Suzuki Nihon Co., Ltd. 23-1 Shinjuyo, Kashiwa City, Chiba Prefecture Inside the standing platform tech

Claims (1)

[Scope of utility model registration request] Claim 1. A control circuit for a hot air heater comprising a vaporizer that vaporizes fuel, a pump that sends fuel, a room temperature control circuit that controls room temperature with a plurality of combustion amounts, and a hot air blower, Equipped with a microcomputer that has a built-in program that reduces the amount of combustion to a level smaller than the normal minimum combustion when extinguishing a fire, continues combustion, changes the duration depending on the amount of combustion before extinguishing mode, and then stops pump operation. A control circuit for a warm air heater, characterized by the following.