JP3346134B2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-air heater for burning indoor fuel and heating the room air by utilizing the heat of the fuel.

[0002]

2. Description of the Related Art Conventionally, in this type of hot air heater, as shown in FIG. 5, fuel is supplied from a cartridge tank 26 to a tank 25, and the fuel in the tank 25 is maintained at a predetermined temperature or higher during combustion by a pump 27. The gas is supplied to the vaporizing section 28. Then, the fuel is vaporized by the vaporization section 28 kept at a high temperature to become a fuel gas, is ejected from a nozzle 29, is supplied to a burner section 30, and is burned there. The generated combustion gas is guided upward by a combustion tube 31 disposed so as to cover the periphery of the burner unit 30, mixed with a room air flow from a blower 33 by a duct 32 covering the combustion tube 31, and heated. It is discharged as wind and used for heating.

A nozzle 29 for ejecting fuel vaporized gas from a vaporizing section 28 is opened and closed by a needle valve provided on a movable section of an electromagnetic solenoid 34, and when combustion is stopped, electricity is supplied to the electromagnetic solenoid 34 for a predetermined time. The combustion is stopped by preventing the fuel gas from being ejected from the fuel cell.

[0004]

However, in such a conventional hot air heater, when the power supply to the device is stopped for some reason such as disconnection of the outlet of the device during combustion,
Power supply to the blower 33, the pump 27, and the like is stopped, and the combustion is interrupted. At this time, the vaporized gas of the fuel stored in the vaporizing section 28 kept at a high temperature is not burned,
There is a problem in that the gas is discharged more, emits white smoke with a strong odor, and goes out of the device to cause discomfort and anxiety to the user.

[0005] This power outage is usually not likely to occur frequently due to the power situation, and it is considered that even if there is a short period of time, it is likely that the user will accidentally turn off the power of the equipment. If it is assumed that the power has been removed, and the power is immediately restored at that time, the power is cut off once and the combustion remains stopped. Even if the user manages the above-mentioned white smoke of the vaporized gas or the like, the user does not stop, and the user is very dissatisfied.

[0006] When the power failure is repeated, the vaporized gas of the fuel ejected from the nozzle 29 adheres to the surroundings,
There is also a possibility that tarification occurs, the function of the attached portion is reduced, and a constant odor is generated.

Further, the interruption of the combustion causes the temperature in the vicinity of the burner section 30 to rise, raising the temperature of the surrounding parts and the exterior of the upper part of the main body, causing burns to the user and impairing the performance of the equipment. There were challenges.

The first object of the present invention is to solve the above-mentioned problems, and it is a first object of the present invention to reduce the discharge of vaporized gas of fuel in a vaporizing section when an apparatus recovers from power failure, thereby preventing discomfort to a user. It is a second object of the present invention to prevent heat buildup in the burner section.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a tank for storing fuel, a pump for sucking and discharging fuel from the tank, and a vaporizer for vaporizing fuel supplied by the pump. Unit, a nozzle for ejecting fuel vaporized gas of the vaporizing unit, an electromagnetic solenoid for opening and closing the nozzle with a needle valve provided in a movable unit thereof, a vaporizing unit temperature detecting unit for detecting a temperature of the vaporizing unit, A burner section for burning the fuel vaporized gas from the vaporization section, a combustion cylinder covering the burner section and guiding the combustion exhaust gas generated in the burner section upward, and covering the combustion cylinder and mixing the combustion exhaust gas with the indoor airflow from the blower. A duct for hot air, a power failure confirmation means for detecting a power failure, an operation unit for setting operating conditions such as a control temperature, and a pump, a blower, etc. are determined in advance based on the conditions set by the operation unit. A control unit that performs control in a given sequence, and when the power failure confirmation unit determines that the power failure has just been recovered, when the vaporization unit temperature detection unit is at or above a predetermined temperature, the vaporization unit temperature detection unit is at or below a predetermined temperature. Up to this point, a power failure recovery control unit that operates the electromagnetic solenoid to close the nozzle unit, and then opens the nozzle unit by operating the electromagnetic solenoid is provided. ADVANTAGE OF THE INVENTION According to this invention, discharge of the vaporized gas of the fuel in a high temperature vaporization part can be reduced, and a user's discomfort and anxiety can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a tank for storing fuel, a pump for sucking and discharging fuel from the tank, and a vaporizing section for vaporizing the fuel supplied by the pump. A nozzle for ejecting fuel vaporized gas from the vaporizing section, an electromagnetic solenoid for opening and closing the nozzle with a needle valve provided on a movable section thereof, vaporizing section temperature detecting means for detecting a temperature of the vaporizing section, and the vaporizing section. A burner section for burning the fuel vaporized gas from the combustion chamber, a combustion cylinder covering the burner section and guiding the combustion exhaust gas generated in the burner section upward, and covering the combustion cylinder with the combustion exhaust gas and the indoor air flow from the blower to mix hot air A power failure confirmation means for detecting a power failure, an operation unit for setting operating conditions such as a control temperature, and a pump 4 or a blower 8 under the conditions set by the operation unit.
And a control unit that controls a predetermined sequence, etc., and when the power failure confirmation unit determines that the power failure has just been recovered, when the vaporization unit temperature detection unit is at a predetermined temperature or higher, a predetermined time or the vaporization unit temperature detection unit Until a predetermined temperature or less, the electromagnetic solenoid is operated, the nozzle part is closed, and then a power failure recovery control part that operates the electromagnetic solenoid to open the nozzle part is provided. It is possible to reduce the discharge of the vaporized gas of the fuel, and to prevent the user from feeling uncomfortable or uneasy.

According to a second aspect of the present invention, there is provided a tank for storing fuel, a pump for sucking and discharging the fuel from the tank, a vaporizer for vaporizing the fuel supplied by the pump, and a fuel vaporizer for the vaporizer. A nozzle for injecting gas, an electromagnetic solenoid for opening and closing the nozzle portion with a needle valve provided on a movable portion thereof, a vaporizing portion temperature detecting means for detecting a temperature of the vaporizing portion, and fuel vaporized gas combustion from the vaporizing portion A burner portion to be heated, a combustion tube covering the burner portion and guiding combustion exhaust gas generated in the burner portion upward, a duct for covering the combustion tube and mixing the combustion exhaust gas and indoor air flow from a blower to generate hot air, A power failure confirmation means for detecting the temperature, an operation unit for setting operating conditions such as control temperature, and a pump 4 or a blower 8 controlled in a predetermined sequence under the conditions set by the operation unit. When the evaporator temperature detection means is higher than a predetermined temperature, the evaporator temperature detector is turned on for a predetermined time or until the evaporator temperature detector becomes lower than a predetermined temperature when the power failure check means determines that the power failure has just been recovered. After operating and cooling the device, it is provided with a power failure recovery control unit that stops the blower, the temperature near the burner part can reduce stagnation, surrounding parts and the exterior temperature of the upper part of the main body can be increased, It is possible to prevent abnormalities such as burning the user or impairing the performance of the device.

According to a third aspect of the present invention, when the power failure confirmation means determines that the power failure has just been restored, the temperature of the vaporization part temperature detection means is lower than a predetermined temperature when the temperature of the vaporization section temperature detection means is higher than a predetermined temperature. Until then, after operating the electromagnetic solenoid and the blower to close the nozzle section, and after cooling the device, the electromagnetic solenoid is operated to open the nozzle section and provide a power failure reset control section for stopping the blower. Item 1 is described, and the operation is the same as that of claim 1.

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment) First, the configuration of a hot-air heating device using a combustion device of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. 1
Is a main body case, on which a tank 2 for holding liquid fuel is provided on a lower side thereof, and a detachable cartridge tank 3 is provided above the tank 2. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, which supplies fuel to the vaporizing section 6 from the upper end thereof via an oil supply pipe 5.

The vaporizing section 6 is formed in a donut shape so that a mixing pipe 7 protrudes at the center thereof and surrounds the mixing pipe 7, and a heater 8 and a vaporizing section temperature detecting means 9 are disposed on the peripheral wall. is there. Reference numeral 10 denotes a communication passage provided to the nozzle unit 11 on the side opposite to the mixing pipe 7 with respect to the inlet of the oil feed pipe 5 of the vaporization unit 6.

A return pipe 12 connected to the tank 2 and an electromagnetic solenoid 13 are connected to the nozzle portion 11, and a needle valve 14 for opening and closing the nozzle portion hole 11A of the nozzle portion 11 is connected to the electromagnetic solenoid 13. Is provided. Reference numeral 15 denotes a burner placed above the vaporizing section 6 so as to cover the outlet of the mixing pipe 7.
An ignition means 17 such as a high-pressure discharge for starting the combustion of the vaporized gas ejected from the flame hole 16 formed on the peripheral wall of the rim is provided.
Numeral 18 denotes a combustion tube for guiding the combustion gas from the burner section 15 upward, and a blower 19 for taking in and sending out the indoor air flow at the back thereof.
Is arranged. Reference numeral 20 denotes a duct which mixes the combustion gas from the combustion cylinder 7 with the indoor air flow to generate hot air.

Reference numeral 21 denotes a pump 4 based on a signal of an operating condition such as a control temperature input from an operation unit 22 or a signal of a sensor such as a vaporizing unit temperature detecting means 9 provided in the apparatus.
The control unit controls the operation of a device that starts and stops combustion by controlling the heater, the heater 8, the blower 19, and the like in a predetermined sequence.

The control unit 21 includes a power failure confirmation unit 23 for detecting that a power failure has occurred, and a vaporization unit temperature detection unit 9 when the power failure confirmation unit 22 determines that the power failure has just been restored.
Is higher than a predetermined temperature, the electromagnetic solenoid 13 is kept for a predetermined time or until the temperature of the evaporator temperature detecting means 9 becomes lower than the predetermined temperature.
And a blower 19 are operated, and a power failure recovery control unit 24 for closing the nozzle unit 11 is provided.

In the above configuration, the vaporizing section 6 is heated to a predetermined temperature by the heater 8 and vaporizes oil entering from the inlet of the oil feed pipe 5 in the process of reaching the communication passage 10. The vaporized gas flows downward through the communication passage 10 below the vaporizing section 6 and reaches the nozzle section 11, and activates the electromagnetic solenoid 13 to open the needle valve 14 to eject the vaporized gas from the nozzle section 11. Then, the vaporized gas is supplied into the burner section 15 through the mixing pipe 7 while sucking and mixing the surrounding air, and is ejected from the flame hole 16.

When the ignition means 17 is operated, a uniform flame is formed in the large number of flame holes 16 to start combustion, and even if the ignition means 17 is stopped, the pump 4 supplies fuel to the vaporizing section 6 as it is. If it continues, combustion will continue.

The generated combustion gas is guided upward by a combustion tube 18 disposed so as to cover the periphery of the burner 15, and mixed with a room air flow from a blower 19 by a duct 20 covering the combustion tube 18. It is discharged as warm air and used for heating. When the control unit 21 adjusts the fuel supply amount by changing the drive frequency and applied voltage of the pump 4 based on the operation condition signal input from the operation unit 22 and the like, the primary air amount also decreases. The amount of combustion increases and decreases, and the amount of combustion can be changed while the ratio of fuel and air is kept constant.

When a command to stop the combustion is input from the operation unit 22, the pump 4 is stopped, the electromagnetic solenoid 13 is operated for a predetermined time, the nozzle valve hole 11A of the nozzle unit 11 is closed by the needle valve 14, and the vaporization unit is stopped. The fuel in 6 is returned to the tank 2 via the return pipe 12, and then the electromagnetic solenoid 13 operates the needle valve 14 to open the nozzle hole 11 </ b> A of the nozzle 11 to stop the combustion in the combustion section. It is supposed to.

(Embodiment 2) As shown in the flowchart of FIG. 4, when there is a power failure for some reason during combustion, when the power failure is recovered, the power failure confirmation means 23 determines that it is immediately after the power failure has been recovered. The power failure recovery control unit 24 checks the signal of the vaporization unit temperature detection unit 9 and, when the vaporization unit temperature detection unit 9 is higher than a predetermined temperature, the electromagnetic solenoid 13
And the blower 19 are operated to close the nozzle hole 11A of the nozzle portion 11 and cool the device. Then, the electromagnetic solenoid 13 is operated to operate the nozzle hole 1A of the nozzle portion 11.
1A is opened and the blower 19 is stopped.

Therefore, if a power failure occurs during combustion for any reason, the vaporized gas of the fuel stored in the vaporizing section 6 kept at a high temperature is discharged from the nozzle hole 11A of the nozzle section 11 without burning. There is a concern that the user may feel uncomfortable or uneasy by emitting white smoke with a strong odor to the outside of the device, which may cause the user to feel uncomfortable or uneasy. The electromagnetic solenoid 13 is operated for a predetermined time until the temperature of the nozzle part 11 drops to some extent and the fuel in the vaporization part 6 is returned via the return pipe 14, so that the nozzle part hole 11A of the nozzle part 11 is closed by the needle valve 14. Therefore, after the return, the vaporized gas is not discharged from the nozzle hole 11A of the nozzle 11 and the above-mentioned discomfort and anxiety of the user can be reduced, and the shorter the time of the power failure, the lower the reduction. Uninaru.

Further, when the power failure is repeated, the vaporized fuel gas ejected from the nozzle hole 11A of the nozzle portion 11 adheres to the surroundings and turns into tar, deteriorating the function of the adhered portion. There was also a risk of generating a bad smell, but this is also reduced.

Further, the blower 19 is also operated for a predetermined time while the temperature of the vaporizing section 6 is high at the time of recovery from the power failure, so that the build-up of temperature near the burner section 15 due to the interruption of combustion is eliminated.
Since the temperature of the surrounding parts and the exterior temperature of the upper part of the main body case 1 are increased, the user is not worried about burns or impairing the performance of the device, and the temperature of the vaporizing section 6 is quickly lowered. Also, the operation time of the electromagnetic solenoid 13 can be shortened.

In the above embodiment, the operation of the electromagnetic solenoid 13 and the operation of the blower are performed for a predetermined time at the time of recovery from the power failure, but the operation of the electromagnetic solenoid 13 and the operation of the blower 19 are determined by detecting the temperature of the vaporizer. The configuration in which the operation of the electromagnetic solenoid 13 and the blower 19 is simultaneously performed may be employed until the temperature of the means 9 becomes equal to or lower than the predetermined temperature, but the operation of the electromagnetic solenoid 13 and the blower 19 is simultaneously performed. May be set. Further, the configuration in which both the electromagnetic solenoid 13 and the blower 19 are operated has been described. However, this may be performed by operating only the electromagnetic solenoid 13 or only the blower 19, and the configuration of each part is within a range that achieves the object of the present invention. If so, the configuration may be any.

[0027]

As described above, according to the combustion apparatus of the present invention, the power failure recovery control unit determines whether the vaporization unit temperature detection means at the time of recovery from power failure is higher than a predetermined temperature for a predetermined time or the vaporization unit temperature detection means is lower than a predetermined temperature. The nozzle is closed by operating the electromagnetic solenoid until the temperature becomes low, so that it is possible to reduce the discharge of the vaporized gas of the fuel in the vaporizing section, which is at a high temperature, and to reduce the user's inconvenience. Pleasure and anxiety can be prevented.

Also, since the blower is operated at the same time to cool the equipment, the temperature near the burner can be reduced, so that the temperature of surrounding parts and the exterior of the upper part of the main body can be increased, It is possible to prevent abnormalities such as burns on the device and impair the performance of the device.

[Brief description of the drawings]

FIG. 1 is a control block diagram of a hot air heater according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of the hot air heater.

FIG. 3 is a sectional view of a main part of the hot air heater.

FIG. 4 is a flowchart of a warm air heater according to the second embodiment.

FIG. 5 is a cross-sectional view of a conventional hot air heater.

[Explanation of symbols]

 2 Tank 4 Pump 6 Vaporizing section 9 Vaporizing section temperature detecting means 11 Nozzle section 11A Nozzle section hole 13 Electromagnetic solenoid 14 Needle valve 15 Burner section 21 Control section 23 Power failure confirmation means 24 Power failure recovery control section

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23N 5/24 101 F23N 5/02 342 F24H 3/04 305

Claims (3)

(57) [Claims] 1. A tank for storing fuel, a pump for sucking and discharging fuel from the tank, a vaporizer for vaporizing fuel supplied by the pump, and a nozzle for ejecting fuel vaporized gas from the vaporizer. An electromagnetic solenoid for opening and closing the nozzle with a needle valve provided on a movable portion thereof, a vaporizing portion temperature detecting means for detecting a temperature of the vaporizing portion, a burner portion for burning fuel vaporized gas from the vaporizing portion, and the burner portion A combustion cylinder that covers the combustion cylinder and guides the combustion exhaust gas generated in the burner section upward, a duct that covers the combustion cylinder and mixes the combustion exhaust gas and the indoor air flow from the blower to generate hot air, and a power failure confirmation unit that detects a power failure, An operation unit that sets operating conditions such as a control temperature; and a control unit that controls the pump 4 and the blower 8 in a predetermined sequence under the conditions set by the operation unit. When it is determined by the power checking means that the power supply has just recovered from the power failure, when the temperature of the vaporizing section temperature detecting means is higher than a predetermined temperature, the electromagnetic solenoid is operated for a predetermined time or until the temperature of the vaporizing section temperature detecting means becomes lower than the predetermined temperature, and the nozzle section is operated A hot air heater provided with a power failure recovery control unit that opens a nozzle unit by operating an electromagnetic solenoid after being closed. 2. A tank for storing fuel, a pump for sucking and discharging fuel from the tank, a vaporizer for vaporizing fuel supplied by the pump, and a nozzle for ejecting fuel vaporized gas from the vaporizer. An electromagnetic solenoid that opens and closes the nozzle portion with a needle valve provided in a movable portion thereof, a vaporizing portion temperature detecting unit that detects a temperature of the vaporizing portion, a burner portion that burns fuel vaporized gas from the vaporizing portion, and the burner A combustion cylinder that covers the section and guides the flue gas generated in the burner section upward, a duct that covers the combustion cylinder and mixes the combustion flue gas with the indoor air flow from the blower to generate hot air, and a power failure confirmation unit that detects a power failure. An operation unit for setting operating conditions such as a control temperature, and a control unit for controlling the pump 4, the blower 8, and the like in a predetermined sequence under the conditions set by the operation unit. When it is determined by the power failure confirmation means that the power failure has just been recovered, when the vaporization part temperature detection means is at or above the predetermined temperature, the blower is operated to cool the device for a predetermined time or until the vaporization part temperature detection means is at or below the predetermined temperature. A hot air heater equipped with a power failure recovery control unit that stops the blower. 3. When the power failure confirmation means determines that the power failure has just been recovered, the electromagnetic solenoid and the blower are operated when the vaporization part temperature detection means is at or above a predetermined temperature for a predetermined time or until the vaporization part temperature detection means is at or below the predetermined temperature. The hot air according to claim 1, further comprising a power failure recovery control unit that operates, closes the nozzle unit, cools the device, and then operates the electromagnetic solenoid to open the nozzle unit and stop the blower. heater.