JPH09229361A - Hot air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the lowering in rotation of a blower, prevent the quick change of a combustion stop and safely use for a long period a hot air heater used for heating by burning fuel. SOLUTION: When temperature obtained by a room temperature detecting means 23 during the reset of a power failure by a power failure reset control part 28 is a prescribed temperature or higher, a solenoid 13 is operated until the temperature obtained by the room temperature detecting means 23 reaches the prescribed temperature or lower for a prescribed time so that a nozzle part is closed. Thus, the exhaust of the vaporized gas of fuel in a vaporizing part at a high temperature can be lowered and the uncomfortable or uneasy feeling of a user can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to combustion control of a warm air heater used for heating by burning fuel and ejecting indoor air as warm air by utilizing heat of the fuel.

[0002]

2. Description of the Related Art Conventional hot air heaters of this type are shown in FIGS.
As shown in, the fuel is supplied from the cartridge tank 45 to the tank 44, and the fuel in the tank 44 is supplied by the pump 46 to the vaporizing section 47 kept at a predetermined temperature or higher during combustion. The fuel is supplied to the vaporization section 4 maintained at a high temperature.
The gas is vaporized in 7 to become fuel gas, which is ejected from the nozzle 48, supplied to the burner portion 49, and burned there. Further, in the vicinity of the burner portion 49, a flame rod type combustion sensor 51 for detecting a combustion state by applying a voltage between the flame electrode 50 placed in the combustion flame and the burner portion 49 and measuring the amount of flowing current. Is provided. The generated high-temperature combustion exhaust gas is guided upward by the combustion cylinder 52 arranged so as to cover the periphery of the burner portion 49, and is mixed with the indoor air flow from the blower 54 by the duct 53 covering the combustion cylinder 52. ,
It is discharged as warm air and used for heating.

The nozzle 48 for ejecting the fuel vaporized gas of the vaporizing section 47 is opened and closed by a needle valve provided in the movable section of the electromagnetic solenoid 55, and when the combustion is stopped, the electromagnetic solenoid 55 is energized for a predetermined time to cause the nozzle 48 to flow. Combustion is stopped so that the fuel gas is not ejected from.

Further, the control section 56 applies a voltage between the flame electrode 50 and the burner section 49 to the output corresponding to the combustion state, and measures the amount of current flowing to obtain the combustion sensor 5.
When the combustion is controlled from the output of 1 and the combustion of the burner section 49 causes an abnormality for some reason,
For example, when the combustion air becomes extremely small, the current value decreases, and the control unit 56 prevents abnormal premature disconnection in a normal state. Therefore, if the current value is kept below the predetermined value for a predetermined time, it is abnormal. Therefore, the control unit 56 determines that the pump 46
The air blower 54 is controlled in a predetermined sequence to stop the combustion.

[0005]

However, in the hot-air heater having such a conventional structure, when the outlet of the equipment is pulled out or the power supply to the equipment is stopped due to some cause during combustion, the air blower 54, the pump 46, etc. are supplied. De-energization stops and combustion is discontinued. At this time, the vaporized gas of the fuel accumulated in the vaporization section 47 kept at a high temperature is not burned but is discharged from the nozzle 48, becomes a white smoke with a strong odor, and goes out of the device for use. There was a problem that caused discomfort and anxiety to the person.

[0006] Normally, this power failure is unlikely to occur so often due to power supply conditions, and even if there is a short period of time, it is usually possible that the user mistakenly turns off the power of the equipment. It is assumed that it is removed, and even if the power supply is immediately returned to the original state at that time, the power supply is cut off once and the combustion remains stopped. And even if the user tried to manage the white smoke of the above-mentioned vaporized gas and the like, it did not stop and brought great dissatisfaction to the user.

When the power failure is repeated, the vaporized gas of the fuel ejected from the nozzle 48 adheres to the surroundings,
There was also a risk of tar formation, deterioration of the function of the adhered part, and generation of a constant odor.

Further, due to the interruption of combustion, the temperature in the vicinity of the burner portion 49 is muffled, which raises the temperature of surrounding parts and the exterior temperature of the upper part of the main body, which may cause burns and impair the performance of the equipment. there were.

Furthermore, when the rotation of the blower 54 is weakened or stopped for some reason during combustion, the burner section 49
There is a possibility that a part of the wind of the blower 49 that is supplied to the air and that is used as the combustion air is reduced, causing a problem in the combustion of the burner portion 54.

This is more likely to occur as combustion is weak and the set rotational speed of the blower 54 is lower, that is, the blower 54
When the rotation speed of the blower 54 is low, the rotation force of the blower 54 is weak, and the rotation speed of the blower 54 increases due to defects such as scratches and rust on the shaft of the blower 54 itself and dust bites on the bearings. When the combustion amount is low or the combustion amount is low and the ejector effect is small and the combustion amount is low, the combustion speed is more likely to be affected by the lowering of the rotation speed of the blower 54, and the combustion tends to be deficient in air and disturbed easily.

If the combustion is disturbed, the characteristics of the combustion exhaust gas may be deteriorated to generate an odor or carbon monoxide. Therefore, the control section 56 detects the combustion state of the burner section 49. When the output of the combustion sensor 51 decreases and is kept below a predetermined level for a predetermined time, it is determined that the combustion of the burner section 49 has caused an abnormality for some reason, and the combustion is stopped. There was a problem that caused a break.

If the above-mentioned predetermined level is lowered in order to prevent premature cutting, or if the predetermined time for holding is increased to the direction of delayed cutting, the rotation of the blower 54 may be stopped, and the burner section 49 may be stopped. The high-temperature exhaust gas burned in the above will flow upward, causing the temperature of the upper part of the main body to rise abnormally, burning parts such as the operating part arranged on the upper part of the main body, raising the exterior temperature of the upper part of the main body case, There was also concern about fire.

Even if the number of revolutions of the blower 54 does not change, the airflow of the blower 54 discharged from the device as warm air is lost to other winds from the front, for example, by a draft of a window, etc. Even if it flows back to the 49 side, there is a problem that combustion is disturbed as described above.

The present invention has solved the above-mentioned problems. A first object of the present invention is to reduce the discharge of vaporized gas of fuel in the vaporization section to prevent discomfort to the user when the equipment is restored from a power failure. When air blows back to the burner due to drafts, or the rotation of the blower becomes weak for some reason and tries to stop, increase the number of rotations of the blower so that the rotation of the blower does not become weak and stop combustion. The second purpose is to prevent premature disconnection of the burner so that it can be used safely for a long period of time, and the third purpose is to prevent heat buildup in the burner section and equipment.

[0015]

In order to achieve the above object, a tank for storing fuel, a pump for sucking and discharging the fuel from the tank, a vaporizing section for vaporizing the fuel supplied by the pump, and A nozzle for ejecting fuel vaporized gas from the vaporization section, an electromagnetic solenoid for opening and closing the nozzle with a needle valve provided in its movable section, a burner section for burning the fuel vaporized gas from the vaporization section, and a burner covering the burner section. Combustion tube that guides the combustion exhaust gas generated in the 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 warm air, and a net provided at the air intake port of the blower. A fan guard with filter parts such as punching holes and lattice holes, room temperature detection means for detecting the ambient temperature as a representative value of room temperature, and power failure confirmation means for detecting power failure , An operating unit for setting operating conditions such as control temperature, and a control unit for controlling the pump, blower, etc. in a predetermined sequence under the conditions set by the operating unit, immediately after the power failure is recovered by the power failure confirmation means. When the temperature obtained by the room temperature detecting means is equal to or higher than the first predetermined temperature, the electromagnetic solenoid and the blower are operated for a predetermined time or until the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature. Then, after closing the nozzle part and cooling the device, an electromagnetic solenoid is operated to open the nozzle part and a power failure recovery control part for stopping the blower is provided.

According to the above-mentioned invention, the power failure recovery control unit is configured such that, when the temperature obtained by the room temperature detecting means upon recovery from the power failure is equal to or higher than a predetermined temperature, the temperature obtained by the room temperature detecting means becomes equal to or lower than the predetermined temperature for a predetermined time. Since the electromagnetic solenoid is operated to close the nozzle section and the blower is operated to cool the equipment, the vaporized gas of the fuel in the vaporizing section which is at a high temperature is discharged. Can reduce the user's discomfort and anxiety, reduce the heat buildup near the burner, and increase the temperature of the surrounding parts and the exterior temperature of the upper part of the main unit. It is possible to prevent a person from suffering a burn or an abnormality such as impairing the performance of the device.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises a tank for storing fuel, a pump for sucking and discharging the fuel from the tank, and a vaporization section for vaporizing the fuel supplied by the pump.
A nozzle for ejecting the fuel vaporized gas of the vaporization section, an electromagnetic solenoid for opening and closing the nozzle with a needle valve provided in the movable section, a burner section for burning the fuel vaporized gas from the vaporization section, and the burner section. Cover Combustion tube that guides the high temperature combustion exhaust gas generated in this burner portion upward, duct that covers the combustion cylinder and mixes the combustion exhaust gas with the indoor air flow from the blower to generate warm air, and the air intake port of the blower Fan guards with filters such as nets, punching holes, lattice holes, etc., room temperature detection means for detecting the ambient temperature as a representative value of room temperature, power failure confirmation means for detecting power failure, operation of control temperature, etc. The operation unit for setting conditions and the control unit for controlling the pump, the blower, etc. in a predetermined sequence under the conditions set by the operation unit are provided, When the temperature obtained by the room temperature detecting means is equal to or higher than the first predetermined temperature when it is determined to be immediately after the power failure is recovered by the above, until the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature for a predetermined time. After the electromagnetic solenoid is operated to close the nozzle section, a power failure recovery control section for opening the nozzle section again is provided.

When the temperature obtained by the room temperature detecting means upon restoration from the power failure is equal to or higher than the predetermined temperature by the power failure recovery control unit, the electromagnetic solenoid is operated for a predetermined time or until the temperature obtained by the room temperature detecting means becomes lower than the predetermined temperature. Is activated to close the nozzle part, so it is possible to reduce the discharge of vaporized gas of the fuel in the vaporizing part, which is at a high temperature, and prevent user discomfort and anxiety. can do.

Further, a tank for storing the fuel, a pump for sucking and discharging the fuel from the tank, a vaporization section for vaporizing the fuel supplied by the pump, and a burner section for burning the fuel vaporized gas from the vaporization section, A combustion tube that covers the burner section and guides the combustion exhaust gas generated in the burner section upward, a duct that covers the combustion tube and mixes the high-temperature combustion exhaust gas with the indoor air flow from the blower to generate warm air, and the air of the blower. A fan guard with a filter part such as a net, punching holes, and lattice holes arranged at the intake, a room temperature detecting means for detecting the ambient temperature as a representative value of room temperature, a power failure confirmation means for detecting a power failure, a control temperature, etc. An operating unit for setting the operating conditions of the, and a control unit for controlling the pump, the blower, etc. in a predetermined sequence under the conditions set by the operating unit, When the temperature obtained by the room temperature detecting means is equal to or higher than the first predetermined temperature when it is judged by the power failure confirming means immediately after the power failure is recovered, the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature for a predetermined time. Up to this point, a power failure recovery control unit for stopping the blower after the blower is operated to cool the device is provided.

Further, when it is judged by the power failure confirmation means that the temperature is immediately after the power failure is restored, the temperature obtained by the room temperature detecting means is equal to or higher than the first predetermined temperature, the predetermined time or the temperature obtained by the room temperature detecting means is the second predetermined temperature. An electromagnetic solenoid and a blower were operated until the temperature fell below the temperature, the nozzle was closed, and after cooling the equipment, the nozzle was opened again and a power failure recovery control unit was provided to stop the blower. It is a thing.

With the above configuration, the power failure recovery control unit, when the temperature obtained by the room temperature detecting means upon recovery from the power failure is equal to or higher than the predetermined temperature, for a predetermined time or until the temperature obtained by the room temperature detecting means becomes equal to or lower than the predetermined temperature. Operate the electromagnetic solenoid to close the nozzle part and activate the blower,
Since the equipment is cooled, it is possible to reduce the discharge of the vaporized gas of the fuel in the vaporizing part, which is at a high temperature, and to prevent the user's discomfort and anxiety. Can reduce the heat buildup near the burner,
It is possible to prevent abnormalities such as raising the temperature of surrounding parts and the exterior temperature of the upper part of the main body and impairing the performance of the device.

A tank for storing the fuel, a pump for sucking and discharging the fuel from the tank, a vaporizing section for vaporizing the fuel supplied by the pump, and a burner section for burning the fuel vaporized gas from the vaporizing section. A combustion cylinder that covers the burner portion and guides the high temperature combustion exhaust gas generated in the burner portion upward, a duct that covers the combustion cylinder and mixes the combustion exhaust gas with the indoor air flow from the blower to generate warm air, and the blower A fan guard having a filter part such as a net, a punching hole, a lattice hole, etc., which is arranged at the air intake of, and a room temperature detecting means for detecting the ambient temperature as a representative value of room temperature,
An operating section for setting operating conditions such as control temperature, and a control section for controlling the pump, the blower, etc. in a predetermined sequence under the conditions set by the operating section are provided, and the room temperature detecting means is used during combustion. When the obtained temperature is equal to or higher than the first predetermined temperature, the rotation speed of the blower is set to a predetermined rotation speed from the initial rotation speed for a predetermined time or until the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature. When the temperature obtained by the room temperature detecting means is higher than a predetermined temperature,
When the rotation speed of the blower is maintained at a predetermined rotation speed higher than the initial rotation speed for a first predetermined time, and then controlled to return to the initial rotation speed, and when the temperature obtained by the room temperature detecting means is equal to or higher than a predetermined temperature. After maintaining the number of revolutions of the blower at a first predetermined number of revolutions higher than the initial number of revolutions for a certain period of time, the number of revolutions of the blower is set to be higher than the first number of revolutions and lower than the first predetermined number of revolutions. When the temperature obtained by the room temperature detecting means is higher than a predetermined temperature only when the operating speed of the equipment is low and the combustion condition is low and the combustion amount is low, the rotation speed of the blower is higher than the initial speed by a predetermined speed. It is provided with an increasing number of blower control units.

With these constructions, the blower control unit causes the blower rotation speed to decrease when the blower rotation speed decreases for some reason and the temperature obtained by the room temperature detecting means rises above the predetermined temperature due to the hot air in the combustion unit. Is controlled so as to be increased by a predetermined number of revolutions higher than the initial number of revolutions, for example, 50 times / minute, so that the number of revolutions of the blower is increased and the rotation of the blower is continued. Then, a part of the wind of the blower that assists the combustion of the burner section is supplied to the burner section in a large amount and is used as combustion air so that it can be stably combusted. , It is possible to prevent premature termination of combustion stop due to the decrease in the number of revolutions of the blower, reduce the heat buildup near the burner and inside the equipment, raise the surrounding temperature of the surrounding parts and the upper part of the main body, and improve the performance of the equipment. It is possible to prevent abnormalities such as damage.

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) First, the configuration of a hot air heating apparatus using a combustion apparatus according to Embodiment 1 of the present invention will be described with reference to FIGS. 1, 2, 3, and 4. Reference numeral 1 denotes a main body case, on the lower side of which a tank 2 holding a liquid fuel and a detachable cartridge tank 3 are arranged above the tank 2. 4 is tank 2
The fuel is supplied from the upper end of the pump to the vaporizing section 6 through the oil feed pipe 5 by means of the pump mounted on the upper surface of the pump. The vaporizing section 6 has a doughnut-shaped configuration in which a mixing tube 7 projects in the center of the vaporizing section 6 and surrounds the mixing tube 7, and a heater 8 and vaporizing section temperature detecting means 9 are provided on the peripheral wall thereof.

Reference numeral 10 denotes a communication passage which is provided on the opposite side of the mixing pipe 7 to the inlet of the oil feeding pipe 5 of the vaporizing portion 6 so as to connect to the nozzle portion 11. A return pipe 12 communicating with the tank 2 and an electromagnetic solenoid 13 are connected to the nozzle portion 11, and the nozzle portion 11 is connected to the electromagnetic solenoid 13.
The needle valve 14 for opening and closing the nozzle hole 11A is provided. Reference numeral 15 is a burner portion placed on the upper part of the vaporization portion 6 so as to cover the outlet of the mixing pipe 7, and the burner portion 1 is provided in the vicinity thereof.
A voltage was applied to the ignition means 17 such as high-pressure discharge for starting the combustion of the vaporized gas ejected from the flame holes 16 formed on the peripheral wall of No. 5, the flame electrode 18 and the burner portion 11 in the combustion flame, and the flowing current A flame rod type combustion sensor 19 for measuring the amount and detecting the combustion state is provided. It is provided.

Reference numeral 20 denotes a combustion cylinder for guiding the high temperature combustion exhaust gas from the burner portion 15 upward, and a blower 21 for taking in and delivering the indoor air flow is arranged at the back portion thereof. A fan guard 22 is provided at the air intake of the blower 21 and has a filter portion such as a net, punching holes, and lattice holes. In the vicinity of the upper part of the fan guard 22 where the heat of the burner portion 15 flows when the blower 21 is stopped. Room temperature detection means 23 is provided. Reference numeral 24 is a duct that mixes the combustion gas from the combustion cylinder 7 and the indoor air flow to generate warm air.

Further, 25 is a pump 4, a heater 8 and a blower based on a signal of an operating condition such as a control temperature inputted from the operation section 26 and a signal of a sensor such as a room temperature detecting means 23 provided in the equipment. 21 is a control unit that controls the operation of devices that start and stop combustion by controlling 21 and the like in a predetermined sequence.

Further, the control unit 25 has a power failure confirmation means 27 for detecting the occurrence of a power failure, and the temperature obtained by the room temperature detection means 23 is equal to or higher than a predetermined temperature when the power failure confirmation means 27 determines immediately after the power failure is restored. At the time of combustion, during a predetermined time or until the temperature obtained by the room temperature detecting means 23 becomes equal to or lower than the predetermined temperature, the electromagnetic solenoid 13 and the blower 21 are operated to close the nozzle portion 11 and the power failure recovery control portion 28. In the above, there is provided a blower control unit 29 for controlling the drive so as to increase the rotation speed of the blower 21 when the temperature obtained by the room temperature detecting means 23 is equal to or higher than a predetermined temperature.

In the above structure, the vaporizing section 6 is heated to a predetermined temperature by the heater 8 and vaporizes the oil entered from the inlet of the oil feed pipe 5 to the communication passage 10. The vaporized gas flows downward through the communication passage 10 at the bottom of the vaporization section 6 and reaches the nozzle section 11, and the electromagnetic solenoid 13 is operated 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 portion 15 through the mixing pipe 7 while sucking and mixing the surrounding air, and is ejected from the flame hole 16 portion.

When the ignition means 17 is constructed here, a uniform flame is formed in a large number of flame holes 16 to start combustion, and even if the ignition means 17 is stopped, the fuel is supplied to the vaporization part 6 by the pump 4 as it is. If it continues to be supplied, combustion will continue.

The high-temperature combustion exhaust gas generated is burner 15
Is guided upward by the combustion cylinder 20 arranged so as to cover the surroundings of the room, mixed with the indoor air flow from the blower 21 by the duct 24 covering the combustion cylinder 20, discharged as warm air, and used for heating. It Further, the indoor air flow taken from the blower 21 flows into the device through the fan guard 22, is attached to the fan guard 22, and is attached to the room temperature detecting means 23.
Measures the temperature of this indoor air flow and outputs it as room temperature. However, if the rotation of the blower 21 is weakened or stopped for some reason, the hot air in the burner section 15 detects the room temperature.
The temperature near 3 is high.

The oil warm air heater is provided in the control unit 25.
When the fuel supply amount is adjusted by changing the driving frequency and the applied voltage of the pump 4 based on the operating condition signal input from the operating unit 26, the primary air amount also increases / decreases accordingly, and the fuel / air ratio is constant. It is possible to change the amount of combustion while keeping it at.

When combustion stop is input from the operating section 26, the pump 4 is stopped and the electromagnetic solenoid 1 is stopped for a predetermined time.
3, the needle valve 14 closes the nozzle hole 11A of the nozzle part 11, and the fuel in the vaporizing part 6 returns to the return pipe 1
After being returned to the inside of the tank 2 via 2, the electromagnetic solenoid 13 operates the needle valve 14 so as to open the nozzle hole 11A of the nozzle 11, and stops the combustion in the combustion section.

Further, the control section 25 applies a voltage corresponding to the combustion state to the flame electrode 18 and the burner section 15 and measures the amount of current flowing to obtain the combustion sensor 19 obtained.
When the combustion of the burner section 15 becomes abnormal due to some reason, for example, when the combustion air becomes extremely small, the current value decreases and the control section In order to prevent premature disconnection of 25 in the normal state, the control unit 25 determines that it is abnormal if the current value is kept lower than the predetermined value for a predetermined period of time, and the control unit 25 sets the pump 4 and the blower 21 in a predetermined sequence. It is designed to control and stop combustion.

Here, the power failure recovery controller 28 and the blower controller 29 are configured as shown in FIGS. 5, 6, 7, and 8, and the configuration will be described below together with the operation.

First, the invention shown in FIG. 5 will be described. If a power failure occurs for some reason during combustion, the power failure confirmation means 27 determines that the power failure has been recovered by the power failure confirmation means 27, and the power failure recovery control unit 28 indicates the signal from the room temperature detecting means 23 to 3
When the room temperature detecting means 23 is above a predetermined temperature, the electromagnetic solenoid 13 and the blower 21 are set to 32 for a predetermined time.
To close the nozzle hole 11A of the nozzle 11 and cool the device, the electromagnetic solenoid 1
3 is operated to open the nozzle hole 11A of the nozzle 11, and the blower 21 is stopped at 33.

Therefore, if there is a power failure for some reason during combustion, the vaporized gas of the fuel, which has been kept at a high temperature in the vaporization section 6, is not burned and is discharged from the nozzle hole 11A of the nozzle section 11. However, there is a concern that the user may feel uncomfortable or anxious by leaving the equipment as white smoke accompanied by a strong odor, but when the temperature of the vaporization unit 6 is high when the power is restored, the vaporization unit 6 is not affected. The temperature of the nozzle 11 is lowered to some extent, and the electromagnetic solenoid 13 is operated for a predetermined time until the fuel in the vaporizer 6 is returned via the return pipe 12, and the nozzle hole 11A of the nozzle 11 is closed by the needle valve 14. Therefore, after the recovery, the vaporized gas is not discharged from the nozzle portion hole 11A of the nozzle 11, and the above-mentioned user's discomfort and anxiety can be reduced, and the shorter the power outage is, the more reduced. Uninaru.

When this power outage is repeated, the vaporized gas of the fuel ejected from the nozzle portion hole 11A of the nozzle portion 11 adheres to the surroundings, tars, and deteriorates the function of the adhered portion. There was also a risk of generating the odor, but this is also reduced.

Further, since the blower 21 is also operated for a predetermined time while the temperature of the vaporizing section 6 is high when the power is restored, the temperature of the burner section 15 is eliminated due to the interruption of combustion,
Since the temperature of surrounding parts and the exterior temperature of the upper part of the main body case 1 is raised, the user is not injured or the performance of the device is deteriorated, and the temperature of the vaporization part 6 is quickly lowered. The operating time of the electromagnetic solenoid 13 can be shortened.

(Embodiment 2) Next, the embodiment shown in FIG. 6 will be described. When the temperature obtained by the room temperature detecting means 23 at the time of combustion is equal to or higher than a predetermined temperature, the blower control unit 29 is set to 3
In 5 the rotation number of the blower 15 is set to be higher than the initial rotation number by a predetermined number, and further in 36, if the current amount obtained by the combustion sensor 13 in that state is kept below the predetermined value, it is held for a predetermined time. A signal is sent to the control unit 25 to stop the combustion, and the control unit 25 controls the pump 4 and the blower 15 in a predetermined sequence to stop the combustion, and otherwise continues the combustion. .

With the above-mentioned structure, the blower control unit 29
For some reason, when the rotation speed of the blower 21 decreases and the temperature near the room temperature detecting means 23 rises due to the hot air of the burner section 15 and the temperature obtained by the room temperature detecting means 23 reaches a predetermined temperature, for example, 35 ° C. or higher, the blower The rotation speed of 21 is controlled so as to be increased by a predetermined rotation speed, for example, 50 rotations / minute from the initial rotation speed, for example, 500 rotations / minute, and the rotational force is increased by, for example, about 10% by the increased rotation speed. Although the number of rotations of the blower 21 becomes higher, the rotation of the blower 21 is continued.

The output of the combustion sensor 19 is the blower 2
Even if the number of rotations of 1 is increased, if the temperature remains below the predetermined value without recovering for a predetermined time, abnormal combustion does not occur due to the decrease in the number of rotations of the blower 21, and combustion can be stopped due to other factors. Can be secured.

Then, a part of the wind of the blower 21 which assists the combustion of the burner section 15 is supplied to the burner section 15 in a large amount and is used as combustion air so that it can be stably combusted. It is possible to prevent backflow of air to the valve 15, premature interruption of combustion stop due to a decrease in the rotation speed of the blower 21, and further ensure safety.

(Embodiment 3) Next, an embodiment shown in FIG. 7 will be described. When the temperature obtained by the room temperature detection means 23 at 37 during combustion is equal to or higher than a predetermined temperature, the blower control unit 29 makes 38
After maintaining the rotation speed of the blower 21 at a first predetermined rotation speed higher than the initial rotation speed for a first predetermined time, the blower 2 is rotated at 39.
The number of revolutions of 1 is returned to the initial number of revolutions, and further, if the current amount obtained by the combustion sensor 19 falls below a predetermined value and is held for a second predetermined time, the combustion is stopped. A signal is sent to the control unit 25, and the control unit 25 controls the pump 4 and the blower 21 in a predetermined sequence to stop the combustion, and otherwise, continues the combustion.

With the above-mentioned structure, the blower control unit 29
For some reason, when the rotation speed of the blower 21 decreases and the temperature near the room temperature detecting means 23 rises due to the hot air of the burner section 15 and the temperature obtained by the room temperature detecting means 23 reaches a predetermined temperature, for example, 35 ° C. or higher, the blower The rotation speed of the blower 21 is maximized in order to maintain the rotation speed of 21 at a predetermined rotation speed higher than the initial rotation speed of 500 rotations / minute, for example, a maximum rotation speed of 1000 rotations / minute for a first predetermined time of, for example, 3 seconds. Then, the rotation of the blower 21 is restored. After that, the initial rotation speed is controlled to return to, for example, 500 rpm, and when the rotation speed of the blower 21 falls, the rotation speed of the blower 21 is temporarily raised to a higher value and then returned to the original rotation speed. When the number of rotations of the blower 21 drops again, the above control is repeated and the rotation of the blower 21 is continued.

The output of the combustion sensor 19 is the blower 2
Even if the number of rotations of 1 is increased, if the number of rotations of the blower 21 does not recover and remains below the predetermined value for a second predetermined time, the abnormal combustion due to the decrease in the rotation speed of the blower 21 can be stopped because there is another factor. Safety can be secured.

A part of the wind of the blower 21 which assists the combustion of the burner section 15 temporarily increases, but a minimum amount is supplied to the burner section 15 and used as combustion air for stable combustion. As in the case described above, it is possible to prevent backflow of air to the burner portion 15 due to drafts, etc., and to prevent premature interruption of combustion stop due to a decrease in the rotation speed of the blower 21, thus further ensuring safety. .

Here, in the case where the rotation of the blower 21 is reduced due to defects such as scratches and rust on the shaft of the blower 21 itself, dust bites on the bearings, etc., when the rotation of the blower 21 is usually increased to recover, The number of rotations of the blower 21 does not decrease even when the number of rotations of the blower 21 is returned to the original number of rotations after the cause of scratches and rust on the shaft itself of 21 and bite of dust on the bearing portion is eliminated. It has been confirmed through experiments that once the cause of obstructing the rotation is eliminated, the phenomenon in which the number of revolutions decreases is not reproduced, and when the number of revolutions of the blower 21 decreases, the phenomenon occurs temporarily. It is said that when the rotation speed of the blower 21 is raised and the rotation returns, it returns to the original rotation speed, and when the rotation speed of the blower 21 drops again, the above control is repeated, but this is usually only once, and the blower 21 The rotation will continue.

(Embodiment 4) Next, the invention shown in FIG. 8 will be described. When the temperature obtained by the room temperature detecting means 23 at 40 is higher than or equal to the predetermined temperature during combustion, the blower control unit 29 sets the first rotation speed of the blower 21 to a first predetermined rotation speed higher than the initial rotation speed at 41. After being held for a predetermined period of time, at 42, the second predetermined number of revolutions is increased from the initial number of revolutions so as to be higher than the initial number of revolutions and lower than the first predetermined number of revolutions. Then, when the amount of current obtained by the combustion sensor 19 falls below a predetermined value and is held for a second predetermined time, a signal is sent to the control unit 25 to stop combustion, and the control unit 25
Controls the pump 4 and the blower 21 in a predetermined sequence to stop the combustion, and otherwise continues the combustion.

With the above-mentioned structure, the blower control unit 29
For some reason, when the rotation speed of the blower 21 decreases and the temperature near the room temperature detecting means 23 rises due to the hot air of the burner section 15 and the temperature obtained by the room temperature detecting means 23 reaches a predetermined temperature, for example, 35 ° C. or higher, the blower The rotational speed of the blower 21 is kept at a first predetermined rotational speed higher than the initial rotational speed, for example, 500 rotational speeds / minute, for example, at a maximum rotational speed of 1000 rotational speeds / minute for a first predetermined time, for example, 3 seconds. Is increased to the maximum, and the rotation of the blower 21 is restored. afterwards,
A second predetermined number of revolutions, for example 5 from the initial number of revolutions, for example 500 revolutions / min, so that the initial number of revolutions is higher than 500 revolutions / min and is lower than the first predetermined number of revolutions, for example 1000 revolutions / min.
Since the control is performed so as to increase by 0 times / minute, the rotation speed of the blower 21 becomes higher and the rotation of the blower 21 is continued.

The output of the combustion sensor 19 is the blower 2
Even if the number of rotations of 1 is increased, if the temperature remains below the predetermined value without recovering for a predetermined time, abnormal combustion does not occur due to the decrease in the number of rotations of the blower 21, and combustion can be stopped due to other factors. Can be secured.

Then, a part of the wind of the blower 21 which assists the combustion of the burner portion 15 is supplied to the burner portion 15 in a large amount and is used as combustion air so that it can be stably burned. It is possible to prevent backflow of air to the valve 15, premature interruption of combustion stop due to a decrease in the rotation speed of the blower 21, and further ensure safety.

Here, again, after the rotational force of the blower 21 is maximized to ensure that the rotation of the blower 21 is restored, the rotational speed is slightly higher than the initial rotational speed of 500 rpm, for example, 550 rpm. However, the rotational speed of the blower 21 increases, but the rotation of the blower 21 is surely continued. become.

In the configuration of FIG. 5 of the above embodiment, the operation of the electromagnetic solenoid 13 and the blower 21 is performed for a predetermined time when the power is restored, but the operation of the electromagnetic solenoid 13 and the blower 21 is described. The configuration may be such that the room temperature detecting means 23 is operated until the temperature falls below a predetermined temperature, and the operation of the electromagnetic solenoid 13 and the blower 21 is performed at the same time. It may be set to a different time. Further, the configuration has been described in which both the electromagnetic solenoid 13 and the blower 21 are operated, but this may be operated by only the electromagnetic solenoid 13 or the blower 21 individually.

6 and 8 of the above embodiment, when the temperature obtained by the room temperature detecting means 23 during combustion is equal to or higher than the predetermined temperature, the rotation speed of the normal blower 21 is changed to the predetermined rotation speed. Although it is designed to increase only once, this may be repeated, and the configurations of FIG. 6, FIG. 7, and FIG. 8 increase the rotation speed of the blower 21 regardless of the combustion conditions. However, this is because the rotation speed of the blower 21 is low,
If the combustion is limited to weak combustion, which is likely to be deteriorated due to flaws on the shaft of the blower 21 itself, rust, dust bites on the bearings, and the like, such a limiting condition may be effective.

Further, in addition to the configuration of FIG. 5, FIG.
The configurations of FIG. 8 may be combined, and other configurations may be of any configuration as long as the objects of the present invention are achieved.

[0057]

As described above, in the power failure recovery control unit of the present invention, when the temperature obtained by the room temperature detecting means upon recovery from the power failure is equal to or higher than the predetermined temperature, the temperature obtained by the room temperature detecting means for a predetermined time is The electromagnetic solenoid is operated until the temperature falls below a predetermined temperature to close the nozzle part, so it is possible to reduce the discharge of vaporized gas of the fuel in the high temperature vaporization part. It becomes possible to prevent discomfort and anxiety of persons.

Further, the blower control unit increases the rotational speed of the blower by a predetermined number of revolutions from the initial rotational speed in order to prevent backflow of air to the burner portion due to drafts of air, weakening of the rotation of the blower, or an attempt to stop. By controlling the blower to prevent the rotation of the blower from becoming weak, premature stoppage of the combustion stop is prevented, and the blower can be used safely for a long period of time.

Further, since the power failure recovery control section and the blower control section are designed to cool the equipment by the blower, the heat accumulation in the vicinity of the burner can be reduced, and the surrounding parts and the exterior temperature of the upper part of the main body can be reduced. It is possible to prevent abnormalities such as raising the temperature, injuring the user, and impairing the performance of the device.

[Brief description of drawings]

FIG. 1 is a control block diagram according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a combustion warm air heater of the same warm air heater.

FIG. 3 is a cross-sectional view of the main parts of the hot air heater.

[Fig. 4] Detailed view of the main part of the hot air heater

[Fig. 5] Flow chart of the hot air heater

FIG. 6 is a flowchart of the hot air heater according to the second embodiment of the present invention.

FIG. 7 is a flowchart of a hot air heater according to a third embodiment of the present invention.

FIG. 8 is a flowchart of a hot air heater according to a fourth embodiment of the present invention.

FIG. 9 is a control block diagram of a conventional hot air heater.

FIG. 10 is a sectional view of a conventional warm air heater.

[Explanation of symbols]

 2 Tank 4 Pump 6 Vaporizing Section 11 Nozzle Section 13 Electromagnetic Solenoid 14 Needle Valve 15 Burner Section 21 Blower 22 Fan Guard 23 Room Temperature Detection Means 25 Control Section 27 Power Failure Confirmation Section 28 Power Failure Recovery Control Section 29 Blower Control Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazutada Momoda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A tank for storing fuel, a pump for sucking and discharging the fuel from the tank, a vaporization section for vaporizing the fuel supplied by the pump, and a nozzle for ejecting fuel vaporized gas from the vaporization section. An electromagnetic solenoid that opens and closes the nozzle with a needle valve provided in its movable part, a burner part that burns the fuel vaporized gas from the vaporizing part, and a high temperature combustion exhaust gas generated in the burner part that covers the burner part. To the combustion cylinder, a duct that covers the combustion cylinder and mixes the combustion exhaust gas and the indoor air flow from the blower to generate warm air, and a net, a punching hole, a lattice hole, or the like that is disposed at the air intake port of the blower. Fan guard with filter part, room temperature detection means to detect ambient temperature as a representative value of room temperature, power failure confirmation means to detect power failure, operating conditions such as control temperature An operating unit for setting and a control unit for controlling the pump, the blower, etc. in a predetermined sequence under the conditions set by the operating unit are provided. When the obtained temperature is equal to or higher than the first predetermined temperature, the electromagnetic solenoid is operated to close the nozzle portion for a predetermined time or until the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature. After that, the hot-air heater is provided with a power failure recovery control unit that opens the nozzle unit again. 2. A tank for storing fuel, a pump for sucking and discharging the fuel from the tank, a vaporizing section for vaporizing the fuel supplied by the pump, and a burner section for burning the fuel vaporized gas from the vaporizing section. , A combustion cylinder that covers the burner portion and guides the combustion exhaust gas generated in the burner portion upward, a duct that covers the combustion cylinder and mixes the high temperature combustion exhaust gas and the indoor air flow from the blower to generate warm air, and the blower of the blower. A fan guard that has a filter part such as a net, punching holes, and lattice holes arranged at the air intake, a room temperature detecting means that detects the ambient temperature as a representative value of the room temperature, a power failure confirmation means that detects a power failure, and a control temperature An operating unit for setting operating conditions such as, and a control unit for controlling a pump, a blower, etc. in a predetermined sequence under the conditions set by the operating unit, When the temperature obtained by the room temperature detecting means is equal to or higher than the first predetermined temperature when the power confirmation means determines immediately after the power failure is restored, the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature for a predetermined time. The hot-air heater according to claim 1, further comprising a power failure recovery control unit that stops the blower after the blower is operated to cool the device. 3. When the temperature determined by the room temperature detecting means is equal to or higher than a first predetermined temperature when the power failure confirming means determines that the temperature is immediately after the power failure is recovered, a predetermined time or a temperature obtained by the room temperature detecting means is a second value. Operate the electromagnetic solenoid and blower until the temperature falls below a predetermined temperature to close the nozzle section, and
The hot air heater according to claim 1, further comprising a power failure recovery control unit that opens the nozzle unit again after cooling the device and stops the blower. 4. A tank for storing fuel, a pump for sucking and discharging the fuel from the tank, a vaporizing section for vaporizing the fuel supplied by the pump, and a burner section for burning the fuel vaporized gas from the vaporizing section. And a combustion cylinder that covers the burner portion and guides the high temperature combustion exhaust gas generated in the burner portion upward, and a duct that covers the combustion cylinder and mixes the combustion exhaust gas and the indoor air flow from the blower to generate warm air, and A fan guard having a filter part such as a net, punching holes, lattice holes, etc., which is installed at the air intake of the blower, a room temperature detecting means for detecting the ambient temperature as a representative value of room temperature, and operating conditions such as control temperature are set. An operating unit and a control unit for controlling the pump, the blower, etc. in a predetermined sequence under the conditions set by the operating unit are provided, and the room temperature is detected during combustion. When the temperature obtained from the stage is equal to or higher than the first predetermined temperature, the rotation speed of the blower is set to be lower than the initial rotation speed for a predetermined time or until the temperature obtained by the room temperature detecting means becomes equal to or lower than the second predetermined temperature. A warm air heater provided with a blower control unit that increases a predetermined number of rotations. 5. When the temperature obtained by the room temperature detecting means is equal to or higher than a predetermined temperature, the rotation speed of the blower is maintained at a predetermined rotation speed higher than the initial rotation speed for a first predetermined time and then returned to the initial rotation speed. The warm air heater according to claim 3, further comprising a blower control unit that controls the above. 6. When the temperature obtained by the room temperature detecting means is equal to or higher than a predetermined temperature, the rotation speed of the blower is maintained at a first predetermined rotation speed higher than the initial rotation speed for a predetermined time and then becomes higher than the initial rotation speed. The warm air heater according to claim 3, further comprising a blower control unit that increases the second predetermined number of revolutions from the initial number of revolutions so as to be lower than the first predetermined number of revolutions. 7. The rotation speed of the blower is increased from the initial rotation speed by a predetermined rotation speed when the temperature obtained by the room temperature detecting means is equal to or higher than a predetermined temperature only when the operating condition of the equipment is weak operation in which the combustion amount is low. The warm air heater according to claim 4, further comprising a blower control unit.