JP2002276929A - Liquid fuel combustion type warm air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an ignition performance of a liquid fuel combustion type warm air heater at an ignition starting time and to prevent occurrence of an odor. SOLUTION: The liquid fuel combustion type warm air heater comprises a burner 2, a vaporizer 3, a heater 4, a vaporizer temperature sensing element 9, a pump 5, a nozzle 8 mounted at the vaporizer 3, a solenoid valve 10 for opening/closing the nozzle 8, a supply fan 7, a flame state sensing unit 12, an operation start designating switch 14, an operation stop designating switch 15, a room temperature setter 16, an operating state display unit 17, an operation panel 13, a room temperature sensing unit 20, and a central controller 23. In this warm air heater, when the valve 10 is in a closed state at lower than a temperature suitable to gasify the fuel at the temperature of the vaporizer 3, the pump 5 is operated for a certain time, and when the temperature of the vaporizer 3 exceeds its temperature, the valve 10 is opened, the pump 5 is operated to transfer to an ignition operating state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion type hot air heater that performs heating by burning a gas obtained by evaporating liquid fuel.

[0002]

2. Description of the Related Art Conventionally, in the process of igniting a burner in a liquid fuel combustion type hot air heater, a solenoid valve of a nozzle is provided so as to prevent vaporized gas from being blown out of the vaporizer when an operation for starting operation is performed. Is activated to close the valve, then the temperature of the vaporizer is detected by the vaporizer temperature detection element, and the heater is energized to raise the temperature of the vaporizer, and the temperature of the vaporizer reaches the temperature at which the liquid fuel vaporizes. When it reaches, the pump is operated to feed the liquid fuel to the vaporizer, and the vaporized gas is generated in the vaporizer.

[0003] Next, to the place where the spark was fired by the igniter on the upper surface of the burner, the solenoid valve was operated to open the valve.
A flame is formed by ejecting the vaporized gas to the burner.

[0004]

However, in the conventional heater described above, when the temperature of the vaporizer reaches the temperature at which the liquid fuel vaporizes, the pump and the vaporizer are operated when the pump is operated to feed the liquid fuel to the vaporizer. Is connected by an oil supply pipe, so the liquid fuel sent from the pump takes several seconds to exhaust the air in the oil supply pipe before reaching the vaporizer. When the temperature of the vaporizer exceeds the optimal temperature at which the liquid fuel is vaporized, the liquid fuel is vaporized at a non-optimal high temperature in the vaporizer and is formed in the burner by the vaporized gas that is not the optimal condition. There is a problem that the flame is formed in a state unfavorable for combustion.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a main body of a liquid fuel combustion type hot air heater, a burner for burning a vaporized gas of a liquid fuel, and A vaporizer that supplies vaporized gas to the burner, a heater that heats the vaporizer, a pump that supplies liquid fuel to the vaporizer, a vaporizer temperature detection element that detects the temperature of the vaporizer, and a vaporizer inside the vaporizer. A nozzle for ejecting vaporized gas to the burner, a solenoid valve for opening and closing the nozzle, a blower fan for supplying combustion air to the burner and mixing high-temperature gas generated by combustion with the air and discharging the mixture into the room, A flame state detection device provided to be exposed to the combustion flame generated in the burner and detecting a state of the flame, an operation start instruction switch, an operation stop instruction switch, a room temperature setting device, and an operation status indicator are provided. An operation panel installed on the top surface of the main unit, a room temperature detection device that detects room temperature, and a heater, pump, and air blower based on signals from the operation start instruction switch, operation stop instruction switch, room temperature setting device, and room temperature detection device In a liquid fuel combustion type hot air heater comprising a fan and a central control device for controlling an operation status indicator,
The pump is operated for a certain time when the vaporizer temperature detected by the vaporizer temperature detection element is lower than the temperature suitable for gasifying the liquid fuel by the signal from the operation start switch and the solenoid valve is closed. When the temperature exceeded the temperature, the solenoid valve was opened, and the pump was operated again to shift to the ignition operation state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a liquid fuel combustion type hot air heater according to the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic configuration diagram of a liquid fuel combustion type hot air heater in one embodiment of the present invention. FIG. 2 is a schematic view of a liquid fuel combustion type hot air heater in one embodiment of the present invention. FIG. 3 is a control system diagram of the liquid fuel combustion type hot air heater in one embodiment of the present invention. FIG. 4 is a flowchart showing the operation of the liquid fuel combustion type hot air heater in one embodiment of the present invention.

Reference numeral 1 denotes a main body of an oil fan heater which is a liquid fuel combustion type hot air heater. Reference numeral 2 denotes a burner for burning a vaporized gas. Reference numeral 3 denotes a vaporizer for vaporizing the liquid fuel. Reference numeral 4 denotes a heater for heating the vaporizer 3. Reference numeral 5 denotes a pump for sending liquid fuel in an oil pan 6 described later to the vaporizer 3. Reference numeral 6 denotes an oil receiving tray to which a fixed amount of liquid fuel is supplied from a refueling tank 24 described later. Reference numeral 7 denotes a blower fan that sends combustion air to the burner 2 and mixes high-temperature gas generated by combustion with the air and discharges the mixture to the outside of the main body 1. Reference numeral 8 denotes a nozzle provided in the vaporizer 3. 9 is a vaporizer temperature detecting element for detecting the temperature of the vaporizer 3. 1
Reference numeral 0 denotes an electromagnetic valve that opens or closes the ejection port of the nozzle 8. Reference numeral 11 denotes an oil feed pipe that connects the pump 5 and the carburetor 3 and passes the liquid fuel. Reference numeral 12 denotes a flame state detecting device that detects that a flame has been formed on the upper surface of the burner 2.

Reference numeral 13 denotes an operation panel provided on the upper surface, upper side, or the like of the liquid fuel combustion type hot air heater 1. 1
Reference numeral 4 denotes an operation start instruction switch for instructing start of operation.
Reference numeral 5 denotes an operation stop instruction switch for instructing the operation to stop.
Reference numeral 6 denotes a room temperature setting device for setting a target room temperature. Reference numeral 17 denotes an operation status display for displaying a set room temperature, an actual room temperature, and the like. And the blast supplied from the blast fan 7 and the high-temperature combustion gas generated in the burner 2 are mixed to be warmed.

Reference numeral 19 denotes a wall of the warm air chamber which separates the warm air chamber 18 from the upper outer shell of the heater main body 1 so that the warm air does not leak. Reference numeral 20 denotes a room temperature detecting device for detecting a room temperature. Reference numeral 21 denotes a hot air outlet from which the hot air generated in the hot air chamber 18 is discharged. Reference numeral 22 denotes an igniter for igniting a flame disposed on the upper surface of the burner 2.

Reference numeral 23 denotes a central control unit for performing each operation control, and includes an operation start instruction switch 14, an operation stop instruction switch 15, a room temperature setting device 16, a room temperature detection device 20, a vaporizer temperature detection element 9, and a flame state detection device. Based on the input from 12, the heater 4, the pump 5, the blower fan 7, the solenoid valve 10, the igniter 22, and the operation state display 17 are drive-controlled.

Reference numeral 24 denotes a fuel tank for supplying liquid fuel to the oil receiving tray 6.

As a basic operation of the operation, as shown in the flowchart of FIG. 4, when the operation start instruction switch 14 is operated to instruct the start of the operation, the central control unit 23 sends the heater 4 of the vaporizer 3 to the heater 4. The energization is started and the solenoid valve 10 is operated to close the nozzle 8. Then, the temperature of the vaporizer 3 is detected through the vaporizer temperature detecting element 9, and when the temperature reaches a temperature suitable for gasifying the liquid fuel, that is, a combustion startable temperature, the pump 5 is operated to operate the vaporizer 3. The internal pressure is increased, and the vaporized gas is ejected from the nozzle 8. At the same time, the igniter 22 is activated to cause the burner 2 to generate a flame. When the presence of a flame is confirmed by the flame state detection device 12, the blower fan 7 is operated to blow air to the warm air chamber 18, and the generated warm air is discharged out of the main body 1. After the start of the combustion, the central control unit 23 controls the heater 4 while monitoring the signal of the vaporizer temperature detecting element 9 so that the vaporizer 3 is maintained at a temperature necessary for maintaining the normal combustion. It is supposed to.

In such a configuration, the operation will be described in more detail. When the operation start instruction switch 14 is operated to instruct the start of operation, the central controller 23 turns on the power supply to the heater 4 of the vaporizer 3. At the same time, the solenoid valve 10 is operated to close the nozzle 8.

Here, the temperature of the carburetor 3 is detected through the carburetor temperature detecting element 9, and when the temperature is lower than a temperature suitable for gasifying the liquid fuel, the pump 5 is operated for a certain period of time. 5 and the oil feed pipe 11 are filled with liquid fuel, and when the temperature of the vaporizer 3 exceeds a temperature suitable for gasifying the liquid fuel, the pump 5 is operated again and the pressure in the vaporizer 3 is increased. , The vaporized gas is ejected from the nozzle 8, and the igniter 22 is operated to generate a flame in the burner 2, and the flame state detecting device 12 detects the formation of flame.

Further, the temperature of the vaporizer 3 is detected through the vaporizer temperature detecting element 9, and when the temperature exceeds a temperature suitable for gasifying the liquid fuel, the operation of the heater main body 1 is stopped. The pump 5 has just stopped, and the pump 5 and the oil supply pipe 11 are filled with liquid fuel. Therefore, the pump 5 is not operated.
The internal pressure is increased, the vaporized gas is ejected from the nozzle 8, and the igniter 22 is operated to generate a flame in the burner 2, and the flame state detecting element 12 detects the formation of flame.

Further, the temperature of the carburetor 3 is detected through the carburetor temperature detecting element 9, and when the temperature exceeds the ignition temperature, the operation of the heater main body 1 has just been stopped and the pump 5 Since the oil supply pipe 11 is filled with liquid fuel, the system waits for the temperature of the vaporizer 3 to decrease, and operates the pump 5 when the temperature of the vaporizer 3 falls below the vaporization temperature of the fuel. The pressure in the vaporizer 3 is increased to cause the vaporized gas to be ejected from the nozzle 8, and the igniter 22 is operated to generate a flame in the burner 2, so that the flame state detecting element 1
2 to detect flame formation.

When the flame state detecting element 12 detects the formation of a flame in the above three patterns, the blower fan 7 is operated to blow air to the warm air chamber 18 and the generated warm air is blown into the main body 1.
Release outside. After the combustion is started, the central control unit 2
Numeral 3 controls the heater 4 while monitoring the signal of the vaporizer temperature detecting element 9 so that the vaporizer 3 is maintained at a temperature necessary for maintaining normal combustion.

[0019]

As described above, according to the present invention,
The temperature of the vaporizer is detected, and if the temperature is lower than the temperature suitable for gasifying the liquid fuel, the air in the pump and oil supply pipe is evacuated and filled with the liquid fuel so that the gas concentration at the start of ignition can be reduced. It is constant and the ignition is good, and the stable supply of the vaporized gas is performed, so that the ignition sound is reduced and the odor peculiar to the ignition can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a configuration of a liquid fuel combustion type hot air heater in one embodiment of the present invention.

FIG. 2 is a schematic diagram showing a combustion section of a liquid fuel combustion type hot air heater in one embodiment of the present invention.

FIG. 3 is a block diagram showing operation control of the liquid fuel combustion type hot air heater in one embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the liquid fuel combustion type hot air heater in one embodiment of the present invention.

[Explanation of symbols]

 2 Burner 7 Ventilation fan 9 Vaporizer temperature detecting element 11 Oil supply pipe 13 Operation panel 14 Operation start instruction switch 15 Operation stop instruction switch 16 Room temperature setting device 17 Operation status display 23 Central control device

Claims (1)

[Claims] 1. A main body of a liquid fuel combustion type hot air heater (1).
A burner (2) for burning a vaporized gas of liquid fuel;
A vaporizer (3) for supplying a vaporized gas to the burner (2)
And a heater (4) for heating the vaporizer (3), a pump (5) for supplying liquid fuel to the vaporizer (3), and a vaporizer temperature detecting element for detecting the temperature of the vaporizer (3). 9) and
Nozzle (8) for injecting vaporized gas in vaporizer (3) to burner (2), solenoid valve (10) for opening and closing this nozzle (8), and supply of combustion air to burner (2) And a blower fan (7) that mixes high-temperature gas generated by combustion with air and discharges the mixed gas into a room, and is provided so as to be exposed to a combustion flame generated by a burner (2) to detect a state of the flame. A flame state detection device (12), an operation start instruction switch (14), an operation stop instruction switch (15), a room temperature setting device (16), and an operation status indicator (17) are provided. Operation panel (1
3), a room temperature detecting device (20) for detecting a room temperature, and a signal from an operation start instruction switch (14), an operation stop instruction switch (15), a room temperature setting device (16), and a room temperature detection device (20). And heater (4), pump (5), blower fan (7) and operation status indicator (1
In the liquid fuel combustion type hot air heater comprising the central control device (23) for controlling 7), the vaporizer detected by the vaporizer temperature detecting element (9) by the signal from the operation start instruction switch (14). When the temperature of (3) is lower than the temperature suitable for gasifying the liquid fuel and the solenoid valve (10) is in a closed state, the pump (5) is operated for a certain time, and when the temperature exceeds the temperature, the solenoid valve ( 10. A liquid-fuel-fired hot-air heater, wherein 10) is opened, and the pump (5) is operated again to shift to an ignition operation state.