JP2003074982A - Controller for heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heater capable of preventing overheating from being caused due to dust or the like and capable of continuously and stably heating. SOLUTION: A temperature detecting means 27 for detecting temperature of an evaporator, or a burner 30 or its vicinity is provided. When the temperature detected by the means 27 exceeds a first specified temperature, the controller 20 makes a judgement of abnormality, and stops operation of instruments while giving an alarm. When a next operation is started, the controller 20 sets a combustion quantity regulating range having an upper limit lowered by a specified quantity, and controls combustion within the regulating range changed as above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a warm air heater used for heating by mixing indoor air and combustion gas.

[0002]

2. Description of the Related Art Heretofore, various types of hot air heaters of this type have been proposed, and some of them are used for warm air heating by burning a fuel gas obtained by vaporizing gas or kerosene. Less than,
A warm air heater used for warm air heating by burning the liquid fuel gas will be described as an example. Such a warm air heater is configured as shown in FIG.

That is, the fuel is supplied from the cartridge tank 2 to the tank 1, and the fuel in the tank 1 is supplied to the vaporizing section 4 by the pump 3. Then, it is vaporized in the vaporizing section 4 to become a fuel gas, which is ejected horizontally from the nozzle 5. The fuel ejected from the nozzle 5 is ejected into the mixing pipe 6 provided separately on the downstream side of the vaporization section 4 while sucking the primary air by the ejector effect, and is mixed there to form a line integrated with the mixing pipe 6. It is supplied to the burner section 7 having a shape and burned there. The generated combustion gas is burned by the burner unit
Is guided upward by a combustion tube 8 arranged so as to cover the surroundings of the room, is mixed with the indoor air flow from the blower 10 by a duct 9 covering the combustion tube 8, is discharged as warm air, and is used for heating. It Further, a part of the air flow from the blower 10 is supplied into the combustion cylinder 8 and used as combustion air for combustion in the burner section 7. Then, in this warm air heater, when the fuel supply amount is adjusted by changing the drive frequency and applied voltage of the pump 3, the primary air amount also increases / decreases accordingly, and the combustion amount is maintained while the fuel / air ratio is kept constant. It can be changed.

[0004]

However, when the air intake port (hereinafter referred to as a fan guard) provided at the inlet of the blower 10 is clogged with dust and the air volume from the blower 10 is reduced, or when the device is used again, If the dust entering the inside narrows the air flow path, the air volume decreases and the combustion air supplied to the burner section 7 decreases, or the heat of the burner section 7 accumulates and the temperature inside and outside the equipment rises. I was worried. As a result, the combustion characteristics in the burner unit 7 are deteriorated, carbon monoxide and soot are generated, and there is a risk of causing damage to components of the control unit of the equipment and other components and fire.

Therefore, a vaporization unit 4 is provided by a temperature limiting switch or the like.
Alternatively, a method has been adopted in which the temperature of the burner unit 7 or the vicinity thereof is detected, and when the temperature exceeds a predetermined temperature, it is judged to be abnormal and the operation of the equipment is stopped. However, in such a method, unless the dust that causes the temperature rise is removed, even if the next operation is started, the temperature immediately rises and the operation is stopped, and heating cannot be performed. It had a drawback that it was not easy to use and it was not easy to use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a control device for a heater, which can prevent abnormal overheating and continuously and safely heat the heater.

[0007]

In order to solve the above-mentioned problems, the present invention is provided with temperature detecting means for detecting the temperature of the vaporizer or the burner portion or its vicinity, and the temperature detected by this temperature detecting means is the first. When the temperature exceeds the predetermined temperature, the operation of the equipment is stopped while announcing an abnormality and informing, and at the start of the next operation, the combustion amount adjustment range is set by lowering the upper limit value by a predetermined amount, and the changed combustion amount is set. The configuration is such that a control unit for performing combustion control within the adjustment range is provided.

According to the above construction, when the temperature detected by the temperature detecting means exceeds the first predetermined temperature, it is judged to be abnormal and the operation of the equipment is stopped, so that the equipment temperature rises abnormally. It is possible to stop the operation before and ensure the safety.

Further, at the start of the next operation, the upper limit value is lowered by a predetermined amount to set the combustion amount adjustment range.
The amount of combustion during "strong" combustion is reduced by a predetermined amount, and even if the combustion air is reduced due to clogging with dust etc., the combustion characteristics do not deteriorate so much and the temperature rise is reduced, maintaining safety. It will be possible to continue driving as it is, and the usability for the user will be greatly improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 is a vaporizer for vaporizing a fuel, a burner portion for burning the vaporized fuel, and a temperature detection for detecting the temperature of the vaporizer or the burner portion or the vicinity thereof. Means, a combustion cylinder that covers the burner portion and guides the combustion exhaust gas upward, a duct that covers the combustion cylinder and forms a warm air path by mixing the combustion exhaust gas and the indoor air flow from the blower, and the operation of the device. When the temperature detected by the temperature detecting means exceeds a first predetermined temperature, the control unit includes a control unit that controls the operation, stops the operation of the device while notifying the abnormality, and starts the next operation. At the same time, a combustion amount adjustment range in which the upper limit value is lowered by a predetermined amount is set, and the combustion amount is controlled within this changed combustion amount adjustment range.

When the temperature detected by the temperature detecting means exceeds the first predetermined temperature, the operation of the equipment is judged to be abnormal and the operation of the equipment is stopped. It can be stopped to ensure safety.

Further, at the start of the next operation, the upper limit value is lowered by a predetermined amount to set the combustion amount adjustment range.
The amount of combustion during "strong" combustion is reduced by a predetermined amount, and even if the combustion air is reduced due to clogging with dust etc., the combustion characteristics do not deteriorate so much and the temperature rise is reduced, maintaining safety. It will be possible to continue driving as it is, and the usability for the user will be greatly improved.

Further, according to the invention described in claim 2, the control unit can set the combustion amount adjustment range of the equipment in a plurality of stages, and when the abnormal stop count by the temperature detecting means is the first time, the upper limit value of the first stage is set. The combustion amount adjustment range is set as follows, and at the second time, the combustion amount adjustment range is set as the upper limit value for the second stage. It is controlled by the range.

Further, since the upper limit of the combustion amount adjustment range is controlled to be lowered according to the number of abnormal stops by the temperature detecting means, the combustion characteristic and the effect of ensuring the safety regarding the temperature rise of claim 1 can be obtained. In addition, the effect of improving the feeling of use by continuing heating is obtained, and the duration of combustion is extended, and the life for dust resistance is extended.

Further, when the amount of combustion is large, heat tends to be trapped and the temperature tends to rise, so the predetermined amount for reducing the amount of combustion must be increased. Accordingly, if the combustion amount is reduced by a predetermined amount when the combustion amount is small, the temperature is too low, and there is a risk that the heating feeling is deteriorated. However, the combustion amount adjustment range of the equipment is divided in stages, and the control is performed by lowering the combustion amount adjustment range according to the number of abnormal stops. Therefore, when the combustion amount is large, when the combustion amount is large, when the combustion amount is small, The combustion amount can be reduced to a small extent, and it is possible to prevent unnecessary reduction in heating feeling.

That is, since the control unit divides the combustion amount adjustment range of the equipment stepwise, when the combustion amount is high, the difference in the combustion amount up to the next stage is large, and when the combustion amount is low, The difference in the amount of combustion up to the stage of becomes small, and when the amount of combustion is large, the amount of combustion is reduced slightly when the amount of combustion is significantly small, and it is possible to prevent unnecessary deterioration of the heating feeling Can be improved.

Further, since the control unit divides the combustion amount adjustment range of the equipment stepwise, the combustion amount before the operation of the equipment is judged to be abnormal and stopped, and the predetermined amount to be lowered accordingly is stored. Derivation using calculation or memory becomes unnecessary, and the configuration becomes simple.

Further, in the invention described in claim 3, the control unit is configured so as not to start the operation by turning on and off the operation switch when the number of times of stop of the abnormality by the detection of the temperature detecting means exceeds a predetermined number.

If the correction of the combustion amount makes it impossible to prevent abnormal overheating, or if the combustion amount is too low to destroy the combustion balance, the device cannot be stopped before the abnormality occurs. do it,
There is no risk of equipment damage or fire due to abnormal temperature rise, and safety of the user's burns, etc. will be maintained over the years.

Further, in the invention described in claim 4, the control section is configured to clear the number of times of abnormal stop due to the detection of the temperature detecting means by shutting off the power supply of the equipment.

Since the control section clears the number of abnormal stoppages due to the detection of the temperature detecting means by shutting down the power supply of the equipment, the user cleans the dust of the fan guard when the equipment is out of operation. When the above-mentioned obstacles are removed by removing the above, etc., it is possible to return to the normal operation state, the limitation of the combustion amount adjustment range is lifted, and it is no longer used with the feeling of heating deteriorated, improving the usability Will be able to.

Further, in the invention described in claim 5, the control section is configured to release the limitation of the combustion amount adjustment range when the temperature detected by the temperature detecting means falls below the second predetermined temperature.

Further, the control unit is adapted to release the limitation of the combustion amount adjusting range when the temperature detected by the temperature detecting means falls below the second predetermined temperature. During operation, when the user cleans and removes obstacles such as removing dust from the fan guard, it can return to normal operating condition, the limitation of the combustion amount adjustment range is released, and the heating feeling is reduced while using There is no need to do it, and the usability can be improved.

Further, since the above-mentioned limitation of the combustion amount adjustment range is automatically released, it is not necessary to use it while the feeling of heating is lowered, and the usability for the user is improved.

Further, in the invention as set forth in claim 6, the control unit is configured to release the restriction of the combustion amount adjustment range when the user performs a predetermined operation such as a release button.

Further, since the control section is designed to release the limitation of the combustion amount adjustment range when the user performs a predetermined operation such as a release button, during operation of the device as in claims 4 and 5. In addition, when the user cleans and removes obstacles such as removing dust from the fan guard, it can return to the normal operation state, and the limitation of the combustion amount adjustment range or the increase of the air flow is canceled, and the heating feeling is improved. It is possible to improve the feeling of use as it is no longer used while the value is lowered.

Further, since the limitation of the combustion amount adjustment range is released by the user performing a predetermined operation, the user can be made aware of it and the user can clean it to remove dust from the fan guard. You will be able to evoke the like.

Further, in the invention described in claim 7, the control unit has a means for storing the number of times of stoppage of the abnormality by the detection of the temperature detecting means.

Since the control unit has means for storing the number of abnormal stoppages due to the detection of the temperature detecting means, it is possible to stop the equipment due to the abnormal temperature rise of the above-mentioned equipment due to the interruption of the power supply due to the power failure or the movement of the equipment. It is possible to prevent the control that prohibits combustion in the combustion amount adjustment range above it from being cleared, which improves safety and greatly improves the usability for the user.

In other words, the device is stopped due to the abnormal temperature rise of the device due to the interruption of the power source, and the abnormal overheating marginal condition is generated each time, resulting in an unsafe state and the heating due to the device stop. It is possible to prevent the deterioration of feeling, improve the safety and greatly improve the usability of the user.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a warm air heater according to a first embodiment of the present invention, FIG. 2 is a sectional view of a main part showing a structure of a combustion part of the warm air heater, and FIG. FIG. 4 is a control block diagram of the warm air heater, and FIG. 4 is a flowchart showing the operation of the warm air heater.

First, referring to FIG. 1, the structure of a hot air heating apparatus using the combustion apparatus of the present invention will be described. Reference numeral 11 is a main body case, a tank 12 holding liquid fuel at its lower side and a tank 12 therefor. Detachable cartridge tank 1 on top
3 is provided. Reference numeral 14 is a pump mounted on the upper surface of the tank 12, and is adapted to supply fuel from the upper end thereof to the combustion device 16 via the oil supply pipe 15.

Reference numeral 17 denotes a combustion cylinder for guiding the combustion gas from the combustion device 16 upward, and a blower 18 for taking in and delivering the indoor air flow is arranged at the back of the combustion cylinder. Reference numeral 19 is a duct for mixing the combustion gas from the combustion cylinder 17 and the indoor air flow to generate warm air. Reference numeral 20 denotes a control unit that controls the combustion of the combustion device 16 and the blower 18, and controls the pump 14, the blower 18, and the like in a predetermined sequence based on the operating condition signal input from the operation unit. .

Next, the structure of the combustion device 16 will be described with reference to FIG. 2. Reference numeral 21 is a vaporization portion supported by a fixed base 22, and a space is provided between the vaporization portion 21 and the fixed base 22. Secondary air for combustion is made to flow. Fixed base 22
Is a burner reed 23 that surrounds the vaporization unit 21 from the periphery and guides secondary air for combustion supplied from a blower to the inside thereof.
Supported by.

The vaporizing section 21 is integrally formed with a substantially ring-shaped burner receiving seat 24 and a vaporizing chamber 25 arranged in the burner receiving seat 24 toward the center thereof. Fuel is supplied from the pump 14, and this fuel is vaporized into fuel gas. Reference numeral 26 is a vaporization element provided in the vaporization chamber 25 for increasing the vaporization efficiency of fuel. Reference numeral 27 is a temperature detecting means such as a thermistor for detecting the temperature of the vaporization chamber 25. Based on a signal from the temperature detecting means 27, the control unit 20 sets the operating conditions of the combustion apparatus and controls them in a predetermined sequence. It has become. 28 is a nozzle integrally attached to the end of the vaporization chamber 25.
The fuel gas is emitted from.

Reference numeral 29 denotes a bottomless cylindrical mixing pipe mounted on the burner receiving seat 24 so as to be located above the nozzle 28. The mixing pipe 29 faces the nozzle 28 and the fuel gas ejected from the nozzle 28 and its fuel gas are discharged. It is designed to be mixed with the primary air sucked by the ejector effect due to the ejection of fuel gas.

Reference numeral 30 denotes a burner portion having a cylindrical shape with a ceiling which is overlapped and covered with the burner receiving seat 24 from the upper opening side so as to cover the mixing pipe 29, and a large number of flame holes 31 are provided on the lower peripheral wall. .

Reference numeral 32 denotes an upwardly tapered burner ring attached to the burner receiving seat 24 so as to surround the outer periphery of the flame hole 31, and 33 denotes a heat receiving flange formed on the burner receiving seat 24.

In the above structure, the cartridge tank 1
The liquid fuel supplied to the tank 12 from 3 so as to keep a constant oil level is sucked up from the tank 12 by the pump 14 and sent to the vaporization chamber 25 of the combustion device 16 via the oil supply pipe 15. The sent fuel is vaporized by the vaporization element 26 in the vaporization chamber 25 kept at a predetermined temperature or higher by the heater, becomes high-pressure fuel gas, and is ejected from the nozzle 28.
At that time, the primary air is sucked by the ejector effect while being mixed in the mixing pipe 29 provided on the downstream side of the vaporization chamber 25, supplied into the burner portion 30, and ejected from the flame hole 31 to be burned. Then, the generated combustion gas flows above the combustion cylinder 17, is mixed with the indoor air flow from the blower 18 in the duct 19, is discharged as warm air, and is used for heating. Then, the control unit 20 controls the heater, the pump 14, the blower 18 and the like in a predetermined sequence based on the conditions set by the operation unit to perform operation control such as changing the combustion amount. There is.

Combustion will be explained. The nozzle 2
The fuel gas ejected from 8 flows into the mixing pipe 29 provided on the downstream side of the vaporization chamber 25 while sucking the primary air by the ejector effect, and is mixed there, and the burner portion 30 flows from the upper opening of the mixing pipe 29. When it is discharged inside, it flows back around the outer periphery of the mixing tube 29, ejects from a large number of flame holes 31 provided in the peripheral wall of the burner portion 30, and when high pressure discharge is performed from the ignition rod 66 to the flame holes, it ignites and burns. To start.

At this time, the mixed gas returns to the burner portion 30 and flows around the mixing pipe 29. In this portion, diffusion mixing and uniformization of pressure are promoted, and the mixed gas is uniformly ejected from the flame holes 31 to form a uniform flame. Form. The flame forming direction is controlled so that the flame is directed upward by the burner ring 32 provided so as to be located on the outer periphery of the flame, and stable combustion without lift is performed. Further, the heat receiving flange 33 is heated by the flame formed in the flame hole 31 of the burner section 30, and the vaporization chamber 2 is heated by the heat recovery action from this flame.
The temperature of No. 5 can be maintained at a certain temperature or higher, and it is possible to reduce a part or all of the energization of the heater.

With the above-mentioned configuration, the following operation
Explain the effect.

In the flow chart of FIG. 4, at the time of combustion at the start, the fan guard provided at the inlet of the blower 18 is clogged with dust, and the air volume from the blower 18 decreases.
The air volume decreases, the hot air temperature rises, and the temperature detecting means 20
When the detected temperature exceeds the first predetermined temperature, it is judged to be abnormal, and in step 1, a warning of dust clogging is given and the operation of the device is stopped.

Then, the operation switch is turned on and off,
When the operation is started again, in step 2, the control unit 23 gradually lowers the combustion amount adjustment range on the upper side of the first stage, which is divided stepwise, to start the operation. The combustion amount control range is controlled so that combustion cannot be performed.

Further, as the operation continues, the fan guard provided at the inlet of the blower 18 becomes clogged with dust, the air volume from the blower 18 decreases, the air volume decreases, and the warm air temperature rises. The temperature detected by the temperature detecting means 20 is the first
When the temperature exceeds the predetermined temperature, it is judged as an abnormal step 3
Then, a warning of dust clogging is given and the operation of the device is stopped.

Then, the operation switch is turned on and off,
When the operation is restarted, in step 4, the operation is started by lowering the upper combustion amount adjustment range of the second stage, and the upper combustion amount adjustment range is controlled so as not to burn. ing.

Further, the operation is continued, and the blower 18
The fan guard provided at the inlet of the fan is clogged with dust, the air volume from the blower 18 decreases, the air volume decreases, the warm air temperature rises, and the temperature detected by the temperature detecting means is the first predetermined temperature. When it exceeds, it is judged as abnormal and step 5
Then, a warning of dust clogging is given and the operation of the device is stopped.

After that, the operation is not started even if the operation switch is repeatedly turned on and off.

Next, after the user cleans the dust of the fan guard provided at the entrance of the blower 18, step 6
Then, the power supply of the device is cut off, that is, the power outlet is connected / disconnected, and the number of times of the abnormal stop due to the detection of the temperature detecting means 20 is cleared to return to the normal state.

Then, the operation is started by turning on and off the operation switch, and thereafter, the same control process is repeatedly continued.

Here, when the temperature detected by the temperature detecting means 27 exceeds the first predetermined temperature, it is judged to be abnormal and the operation of the equipment is stopped, so the above-mentioned abnormality of the equipment. Before the temperature rises, the operation can be stopped and safety can be maintained.

Further, since the control unit 20 lowers the combustion amount of the equipment currently in operation at the start of the next operation by a predetermined amount and controls so that the combustion amount adjustment range above it is not combusted, At the start of the operation, the combustion characteristics will not deteriorate so much even if the combustion air decreases due to the decrease in the upper combustion amount, and the temperature rise will also be reduced, allowing the operation to continue while maintaining safety. , The usability for the user is greatly improved.

Further, when the number of abnormal stoppages detected by the temperature detecting means 27 is the first, the upper combustion amount adjustment range of the first stage is lowered, and when the second stop, the upper combustion amount adjustment of the second stage is adjusted. Since the control is performed by lowering the combustion amount adjustment range according to the number of abnormal stops so as to lower the range, the above-mentioned effect of ensuring safety regarding combustion characteristics and temperature rise can be further obtained, and heating can be performed. The effect of improving the feeling of use is obtained by continuing, and the combustion continuation time is prolonged, and the life against dust resistance is extended.

Further, when the amount of combustion is large, heat tends to be trapped and the temperature tends to rise, so the predetermined amount for lowering the amount of combustion must be increased. Accordingly, if the combustion amount is reduced by a predetermined amount when the combustion amount is small, the temperature is too low, and there is a risk that the heating feeling is deteriorated. However, the combustion amount adjustment range of the equipment is divided in stages, and the control is performed by lowering the combustion amount adjustment range according to the number of abnormal stops. Therefore, when the combustion amount is large, when the combustion amount is large, when the combustion amount is small, The combustion amount can be reduced to a small extent, and it is possible to prevent unnecessary reduction in heating feeling.

That is, since the control unit 20 divides the combustion amount adjustment range of the equipment stepwise, when the combustion amount is high, the difference in the combustion amount up to the next stage is large, and when the combustion amount is low, The difference in the amount of combustion up to the next stage becomes small, and when the amount of combustion is large, the amount of combustion is reduced slightly when the amount of combustion is significantly small, and it is possible to prevent unnecessary deterioration of the heating feeling. The feeling can be improved.

Further, since the control unit 20 divides the combustion amount adjustment range of the equipment stepwise, the combustion amount before the operation of the equipment is judged to be abnormal and stopped and stored, and the predetermined amount is lowered accordingly. It is not necessary to derive the value by using calculation or memory, and the configuration becomes simple.

In the case where the above-mentioned correction of the combustion amount makes it impossible to prevent abnormal overheating, or the combustion balance is disturbed by lowering the combustion amount too much, the device cannot be corrected before the abnormality occurs. By stopping the operation, there is no fear of damage to the equipment or fire due to an abnormal temperature rise, and the safety of the user's burns or the like can be maintained even after aging.

Further, since the control section 20 is designed to clear the number of abnormal stoppages due to the detection of the temperature detecting means 27 by shutting off the power supply of the equipment, the user can clean the equipment when the operation of the equipment is stopped. After removing dust from the fan guard to eliminate the above-mentioned obstacles, it is possible to return to the normal operation state, the limitation of the combustion amount adjustment range is released, and it is possible to use it with the feeling of heating lowered. It will be lost and the usability will be improved.

(Second Embodiment) FIG. 5 is a flow chart showing the operation of the combustor of the second embodiment. The same parts as those described in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. Explaining only the different parts, the control unit 20 detects that the temperature detected by the temperature detecting means 27 is lower than the second predetermined temperature. In this case, in step 7, the limitation of the combustion amount adjustment range is released.

In the above configuration, the control unit 20
When the temperature detected by the temperature detecting means 27 falls below the second predetermined temperature, the limitation of the combustion amount adjustment range is released in step 7, so that the device is in operation as in the first embodiment. In addition, when the user cleans and removes obstacles such as removing dust from the fan guard, it can return to the normal operation state, the limit of the combustion amount adjustment range is released, and the feeling of heating is used while lowered. It will be possible to improve the usability.

Furthermore, since the above-mentioned limitation of the combustion amount adjustment range is automatically released, it is not used while the feeling of heating is lowered, and the usability for the user is improved.

(Third Embodiment) FIG. 6 is a flowchart showing the operation of the combustor of the third embodiment, and FIG. 7 is a control block diagram of the combustor. The same parts as those described in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Explaining only the different parts, the control unit 20 will be described when the user presses a predetermined release operation, that is, the release button 34. In addition, in step 8, the limitation of the combustion amount adjustment range is released.

In the above configuration, the control section 20
When the user presses the predetermined release operation, that is, the release button 34, in step 8, the limitation of the combustion amount adjustment range is released. Therefore, as in the first embodiment, during operation of the device, When the user cleans the fan guard to remove dust and other obstacles, normal operation can be restored, the combustion amount adjustment range is limited, or the increase in air flow is canceled, which reduces the feeling of heating. It will not be used as it is, and the usability will be improved.

Further, since the above-mentioned limitation of the combustion amount adjusting range is canceled by the user performing a predetermined operation,
The user can be conscious, and the user can be encouraged to clean and remove dust from the fan guard.

(Fourth Embodiment) FIG. 8 is a control block diagram of a combustor according to a fourth embodiment. The same parts as the parts described in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. When only different parts will be described, the control unit 20 causes the temperature detecting means 27 to be described.
It is configured to have a means 35 for storing the number of times of abnormal stop due to detection of.

Since the control unit 20 having the above-mentioned structure has the means 35 for storing the number of times of the abnormal stop due to the detection of the temperature detecting means 27, the above-mentioned equipment is caused by the interruption of the power supply due to the power failure or the movement of the equipment. It is possible to prevent the control for prohibiting combustion in the combustion amount adjustment range above it from being cleared due to equipment stoppage due to the abnormal temperature rise, and safety can be improved and user convenience is greatly improved.

That is, the device is stopped due to the abnormal temperature rise of the device due to the cutoff of the power source, etc., and each time an abnormal overheating marginal condition occurs every time, an unsafe state occurs and the heating due to the device stop occurs. It is possible to prevent the deterioration of feeling, improve the safety and greatly improve the usability of the user.

The temperature at which the temperature detected by the temperature detecting means 27 is determined to be abnormal is set to a constant value as the first predetermined temperature. However, this may be changed at each stage, and the configuration of each of the other parts is also the same as that of the present invention. The structure may be any one as long as it achieves the purpose.

[0070]

As described above, according to the controller of the heating apparatus of the present invention, when the temperature detected by the temperature detecting means exceeds the first predetermined temperature, it is judged as abnormal and the operation of the equipment is stopped. Thus, the operation can be stopped before the abnormal temperature rise of the equipment, and the safety can be surely maintained.

At the start of the next operation, the upper limit is lowered by a predetermined amount to set the combustion amount adjustment range.
The amount of combustion during "strong" combustion is reduced by a predetermined amount, and even if the combustion air is reduced due to clogging with dust etc., the combustion characteristics do not deteriorate so much and the temperature rise is reduced, maintaining safety. It will be possible to continue driving as it is, and the usability for the user will be greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a warm air heater according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing the configuration of a combustion part of the hot air heater.

FIG. 3 is a control block diagram of the hot air heater.

FIG. 4 is a flowchart showing the operation of the hot air heater.

FIG. 5 is an operation flowchart of the warm air heater according to the second embodiment of the present invention.

FIG. 6 is an operation flowchart of the hot air heater according to the third embodiment of the present invention.

FIG. 7 is a control block diagram of the hot air heater.

FIG. 8 is a control block diagram of a warm air heater according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a conventional warm air heater.

[Explanation of symbols]

17 Combustion cylinder 18 blower 19 ducts 20 Control unit 27 Temperature detecting means 30 burner section

Claims (7)

[Claims] 1. A vaporizer for vaporizing fuel, a burner portion for burning vaporized fuel, temperature detecting means for detecting the temperature of the vaporizer or burner portion or the vicinity thereof, and combustion exhaust gas for covering the burner portion. A combustion cylinder that guides upward, a duct that covers the combustion cylinder and forms a warm air path by mixing the combustion exhaust gas and the indoor air flow from the blower, and a control unit that controls the operation of the device, and the control unit is When the temperature detected by the temperature detecting means exceeds a first predetermined temperature, the operation of the device is stopped while determining that it is abnormal, and the upper limit value is lowered by a predetermined amount when the next operation is started. A heater control device that sets the range and controls the combustion amount within this changed combustion amount adjustment range. 2. The control unit is capable of setting the combustion amount adjustment range of the device in a plurality of stages, and sets the combustion amount adjustment range which is the upper limit value of the first stage when the abnormal stop count by the temperature detecting means is the first time. However, at the second time, the combustion amount adjustment range is set as the upper limit value of the second stage, and the upper limit value is lowered according to the number of abnormal stops, and the control is performed within the set combustion amount adjustment range. The control device for the heating machine according to Item 1. 3. The control device for a heating machine according to claim 1, wherein the control unit does not start the operation by turning on / off the operation switch when the number of abnormal stops by the temperature detecting means exceeds a predetermined number. 4. The control device for a heating machine according to claim 1, wherein the control section clears the number of abnormal stoppages by the temperature detecting means when the power outlet is turned on and off. 5. The control unit releases the restriction of the combustion amount adjusting range when the temperature detected by the temperature detecting means falls below the second predetermined temperature. Control device of the heating machine. 6. The heater according to claim 1, wherein the control unit releases the restriction of the combustion amount adjustment range when the user performs a predetermined operation such as a release button. Control device. 7. The control device for a heating machine according to claim 1, wherein the control unit has means for storing the number of abnormal stops by the temperature detecting means.