JPH11118148A - Combustion control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the increase of a hot air temperature due to adhesion of dust because of a change of a vaporization cylinder temperature, to perform hot air temperature lowering operation and announcing operation, and to ensure safety. SOLUTION: A combustion control device comprises a burner part 13 to perform combustion through mixture of fuel and air; a heat-exchanger 15 to heat-exchange combustion gas; a hot air fan 17 to introduce indoor air and blow out hot air: a hot air amount set part 28 to set a hot air amount; a combustion amount set part 25 to set a combustion amount; a vaporization cylinder temperature sensing device 39; and a set value varying part 36 to vary the set values of the hot air amount set part 28 and the combustion amount set part 25 by the output of the vaporization cylinder temperature sensing device 39. Through the comparison result of temperature levels sensed in a plurality of stages arranged at the vaporization cylinder temperature sensing device 39, the set values of the hot air amount set part 28 and the combustion set part 25 are varied through the set value varying part 36, and an operation state is displayed by an announcing part 23a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control device for burning liquid fuel or the like.

[0002]

2. Description of the Related Art Conventionally, this type of combustor is roughly divided into an open type combustor which takes in indoor air as combustion air, discharges combustion gas into the room, and takes in outside air as combustion air, and burns it outside. There is a closed type combustor that emits gas, but the configuration of hot air blowout is to suck indoor air from the suction port on the back of the combustor with a hot air fan, blow that air along the air duct, and burn it The heat is exchanged by the heated heat exchanger, and the air is blown into the room from the warm air outlet on the front. Then, a temperature sensor for preventing heat is provided in the air duct path, and if the inlet and the hot air outlet are blocked by a shield or the like and the temperature inside the air duct rises abnormally, combustion is stopped to maintain safety. Like that. When the suction port or hot air outlet is completely blocked by a shield or the like, combustion must be stopped immediately to ensure safety.If dust adheres to the guard of the suction port, etc. Since the air volume also gradually decreases, there is no rapid temperature change, and the temperature rises as the amount of adhesion increases. For this reason, conventionally, as shown in Japanese Patent Publication No. 6-17745 and Japanese Patent Publication No. 6-78814, a temperature sensor for detecting a hot air temperature lower than the detection temperature of the heating prevention temperature sensor is provided in the air blowing path, and the hot air temperature sensor is There is a configuration in which the temperature of the hot air is lowered by increasing the blowing amount of the hot air fan by one step or decreasing the fuel supply amount by one step when the temperature detection operation is performed.

FIG. 9 shows the structure of a conventional closed-type combustor. When the operation is started, a heater buried in the vaporizing cylinder 50 is energized to heat the vaporizing cylinder 50 to a predetermined temperature. When the temperature reaches a predetermined temperature, a signal is sent to the combustion control unit 63 to start the ignition operation. The ignition operation is performed by the combustion control unit 63.
First, a signal is supplied from the combustion amount setting unit 74 to the burner motor control unit 65 based on the ignition sequence set in advance, and the burner motor 51 starts rotating and the prepurge operation starts. When the prepurge time elapses, the combustion amount setting unit 7
4 supplies a pump signal to the pump control unit 66. The fuel supply pump 52 discharges the fuel with the output of the pump control unit 66 based on the pump signal, and is sprayed on the wall surface of the vaporizing cylinder 50 which is heated to a predetermined temperature by a flickering fan attached to the shaft end of the burner motor 51. At the same time, the air supply path 6 is controlled by a burner fan mounted coaxially.
2, the outdoor air is supplied as combustion air, mixed with the vaporized gas, and sent to a burner section including a combustion cylinder 53 and the like. Then, the mixture gas is ignited and combustion starts. The combustion gas burned in the combustion cylinder 53 is completely burned in the combustion chamber 54 and discharged outside the room through the exhaust path 56 via the heat exchanger 55. When the combustion proceeds and the heat exchanger 55 reaches a predetermined temperature, a signal is sent from the combustion control unit 63 to the hot air volume setting unit 67, and the hot air motor 58 via the hot air motor control unit 68.
Is operated to suck indoor air from the suction port 59, exchange heat in the high-temperature portion of the heat exchanger 55, and blow warm air into the room from the outlet 72 along the air duct 61. A temperature sensor 60 is provided in the hot air path to detect the temperature of the hot air. When dust starts to adhere to the suction port 59 with the above configuration, the amount of air blown by the warm air fan 57 decreases, and the warm air temperature rises. When the temperature of the temperature sensor 60 rises and the temperature detector 69 rises above the detection level set by the first temperature setting unit 70, a signal is supplied from the first comparator 71 to the combustion amount setting unit 64 or the hot air amount setting unit 67. Then, a control operation for reducing the combustion amount or increasing the hot air flow is performed, and acts to lower the hot air temperature. With such an operation, the stop of combustion due to slight adhesion of dust is prevented and the usability is improved. Still, if the temperature of the temperature sensor 60 rises and the temperature detecting section 69 exceeds the detection level set by the second temperature setting section 73, a signal is sent from the second comparator 74 to the combustion amount setting section 74, and the combustion is stopped. You.

[0004]

Conventionally, when dust adheres to the suction port, the temperature of the components inside the main body rises, exceeding the heat-resistant assurance temperature, causing deformation and failure of the components, and the operation of the main body. In order to prevent the situation of stopping or the temperature of the main body rising abnormally, the temperature change of the temperature sensor provided in the air duct detects the dust adhering to the suction port and reduces the temperature of the hot air as described above. Such an operation is performed, and if the temperature still rises, the operation of stopping the combustion is performed.

[0005] Generally, a temperature sensor provided in a hot air path shows a high temperature when the amount of combustion is large, since the amount of generated heat is large and the temperature of the entire device rises.
When the amount of combustion is small, the temperature inside the device decreases, indicating a low temperature.

[0006] The range of temperature rise when dust adheres to the suction port is substantially constant regardless of the amount of combustion if the amount of dust adhered is the same. Therefore, when the temperature of the temperature sensor exceeds each detection level. Occurs when the amount of combustion is large, and increases when the amount of combustion is small.

Therefore, when the temperature sensor exceeds the detection level at which the combustion is stopped and the combustion is stopped, the amount of dust attached greatly varies depending on the amount of combustion, and this is confusing and uneasy for the user.

On the other hand, in recent years, in pursuit of comfort,
The range of adjusting the combustion amount of the equipment is expanding. Generally, the temperature of the vaporizing cylinder that vaporizes kerosene and the temperature of the combustion cylinder that forms a flame, when the amount of combustion is large, the vaporizing amount of kerosene increases because the vaporizing amount of kerosene increases, and the combustion gas temperature tends to be lower. Therefore, the flame is formed while being lifted from the combustion cylinder, and the temperature of the combustion cylinder also decreases. However, when the amount of combustion decreases, the amount of kerosene vaporization decreases, so the temperature of the vaporization cylinder increases,
Since the amount of combustion gas is reduced, the flame is also formed in a state where it is attached to the combustion cylinder, and the temperature of the combustion cylinder increases.

Therefore, as the range of adjusting the amount of combustion of the equipment increases, the difference between the temperature of the vaporizing cylinder and the temperature of the combustion cylinder due to the magnitude of the amount of combustion increases.

Further, if dust adheres to the suction port, the temperature inside the device rises, so that the temperature of the vaporizing cylinder and the combustion cylinder also rises. The width of the temperature rise when dust adheres to the suction port is substantially constant regardless of the amount of combustion as long as the amount of dust adhered is the same.

When the temperature of the vaporizing cylinder rises in this way, the temperature of the vaporizing surface for vaporizing kerosene exceeds the optimum temperature range for vaporizing kerosene, so that poor vaporization due to film boiling occurs and abnormal combustion accompanied by yellow flame combustion occurs. . In addition, when the temperature of the combustion cylinder rises, the temperature of the portion where the flame adheres also rises, causing a flashback phenomenon. These phenomena are more likely to occur as the temperature of the vaporizing cylinder and the combustion cylinder increase and the combustion amount decreases.

As described above, in a device having a large combustion amount adjustment range, when dust is detected by the method according to the conventional configuration,
When the combustion amount is large, the temperature of the vaporizing cylinder and the combustion cylinder in the steady state is low, and the temperature difference between the temperature of the air duct temperature sensor and the detection level in the steady state is small. The amount of dust attached when the output exceeds the first detection level is small, and the temperature rise of the vaporizing cylinder and the combustion cylinder is small. Therefore, the amount of combustion and the amount of air blown before yellow fire combustion and flashback occur. , The temperature of the hot air can be reduced, and the temperature rise of the vaporizing cylinder and the combustion cylinder can be prevented.

However, when the amount of combustion is small, the temperature of the vaporizing cylinder and the combustion cylinder in the steady state is high, and the temperature difference between the temperature of the air duct temperature sensor and the detection level in the steady state is large, and the temperature of the temperature sensor is low. That is, when the output of the temperature detector rises above the first detection level, the amount of dust attached increases,
Since the temperature rise of the vaporizing cylinder and the combustion cylinder increases, the temperature of the vaporizing cylinder and the combustion cylinder becomes yellow before the operation of preventing the temperature rise of the vaporizing cylinder and the combustion cylinder is performed by controlling the combustion amount and the blowing amount. Since the temperature reaches a temperature at which a flashback phenomenon occurs, yellow fire combustion and a flashback phenomenon occur, causing a problem.

The present invention solves the above problems. When dust adheres, an operation of detecting a change state of the vaporizing cylinder temperature and performing an operation of lowering the temperature of the hot air is performed, thereby suppressing an abnormal rise in the vaporizing cylinder temperature. While preventing yellow fire combustion and flashback phenomenon,
If the temperature of the vaporizing cylinder still rises, the first condition is to detect the changing state of the vaporizing cylinder temperature and stop the combustion before the yellow flame combustion or flashback phenomenon occurs to ensure the safety of the equipment.
In addition, when the temperature of the hot air temperature changes and the temperature of the hot air still rises, the operation of detecting the change of the temperature of the hot air and stopping the combustion is also performed. When a certain amount of dust adheres regardless of the amount of combustion, the operation of lowering the temperature of the hot air or the operation of stopping the combustion is performed to prevent abnormal temperature rise of each part of the equipment main body. The second object is to improve the usability of the user.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air to a rotating shaft, and vaporizing the fuel. Vaporizing cylinder, a vaporizing cylinder temperature detecting device that detects the temperature of the vaporizing cylinder, a combustion control unit that controls the amount of combustion and a sequence, and an operation signal of the refueling pump and the burner motor based on a signal from the combustion control unit. A combustion amount setting unit to be set; a pump control unit to control the refueling pump; a burner motor control unit to control a burner motor; a combustion cylinder to burn a mixed gas of vaporized fuel and air; A heat exchanger for replacement, a hot air fan attached to a hot air motor for sending air to the heat exchanger and blowing it into the room as hot air, and the air volume of the hot air fan A hot air volume setting unit to be set; and a first set value changing unit that changes a set value of an operation signal of a refueling pump, a burner motor, and a hot air motor based on an output of the vaporizing cylinder temperature detecting device. It has a temperature setting section in which a plurality of temperature detection levels are set, and based on a result of comparison with the temperature detection level, an operation signal of an oil supply pump and a burner motor of the combustion amount setting section and an operation of the hot air motor via a set value changing section. In addition to changing the set value of the signal, the notification unit notifies the operating state based on the comparison result with the temperature detection level set arbitrarily, and stops the combustion based on the comparison result with the temperature detection level set at the upper limit. It is configured as follows.

According to the above invention, when the amount of dust adhering to the suction port of the warm air fan increases, the blown air amount decreases, the temperature in the main unit and the warm air temperature increase, and the vaporizing cylinder temperature decreases. Rise. In particular, when the combustion amount is small, the temperature difference between the temperature of the vaporizing cylinder temperature detecting device at normal time and the temperature detection level is small, so that the vaporizing cylinder temperature detection provided in the vaporizing cylinder with the amount of dust attached is small. When the temperature of the device reaches the temperature detection level, the operation of lowering the temperature of the hot air and lowering the temperature of the vaporizing cylinder is performed, so that the temperature of the vaporizing cylinder and the temperature of the combustion cylinder are maintained properly, and the temperature of the vaporizing cylinder still rises. In this case, the combustion is stopped when the temperature of the vaporizing cylinder temperature detecting device reaches the temperature detection level set at the upper limit. As a result, while preventing abnormal combustion such as yellow flame combustion or flashback phenomenon, combustion can be finally stopped, and the safety of the equipment can be maintained.

Means for lowering the temperature of the hot air or stopping the combustion when a certain amount of dust adheres irrespective of the amount of combustion to prevent an abnormal rise in temperature of each part of the equipment main body include: A fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, a vaporizing cylinder temperature detecting device for detecting a temperature of the vaporizing cylinder, A combustion control unit that controls the amount and sequence, a combustion amount setting unit that sets operation signals of the refueling pump and the burner motor with a signal from the combustion control unit, a pump control unit that controls the refueling pump, and a burner motor. A burner motor control unit for controlling, a combustion cylinder for burning a mixed gas of vaporized fuel and air, a heat exchanger for heat exchange of the combustion gas, and a heat exchange A hot air fan attached to a hot air motor that blows air to the room as hot air, a hot air volume setting unit that sets the air volume of this hot air fan, and a hot air temperature detection that detects the temperature of the hot air A first set value changing unit that changes setting values of operation signals of a refueling pump, a burner motor, and a hot air motor with an output of the vaporizing cylinder temperature detecting device; and a refueling pump and a burner motor with an output of the hot air temperature detecting device. And a second set value changing unit for changing a set value of an operation signal of the hot air motor, wherein the vaporizing cylinder temperature detecting device and the hot air temperature detecting device each have a temperature setting unit which sets a plurality of temperature detection levels. Then, based on the result of the comparison with the temperature detection level, the set values of the operation signal of the refueling pump and the burner motor and the operation signal of the hot air motor of the combustion amount setting unit via the first set value changing unit or the second set value changing unit. Strange In addition, the operation state is notified by the notification unit based on the comparison result with the temperature detection level set arbitrarily, and the combustion is stopped based on the comparison result with the temperature detection level set at the uppermost limit. ing.

According to the present invention, by detecting an abnormal temperature rise of the hot air temperature when dust adheres to both the vaporizing cylinder temperature and the hot air temperature, a certain amount of dust can be detected regardless of the combustion amount. When the air adheres, an operation of lowering the temperature of the hot air or an operation of stopping the combustion is performed to prevent an abnormal rise in temperature of each part of the device main body.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to a first aspect of the present invention provides a fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air to a rotating shaft, a vaporizing cylinder for vaporizing the fuel, A vaporizing cylinder temperature detecting device for detecting the temperature of the vaporizing cylinder, a combustion control section for controlling the amount of combustion and a sequence, and a combustion amount setting section for setting operation signals of the refueling pump and the burner motor by a signal from the combustion control section. A pump control unit for controlling the refueling pump, a burner motor control unit for controlling a burner motor, a combustion cylinder for burning a mixed gas of vaporized fuel and air, and a heat exchange for exchanging heat of the combustion gas. A hot air fan attached to a hot air motor for sending air to the heat exchanger and blowing it out as hot air into a room; and a hot air amount setting unit for setting an air blowing amount of the hot air fan. A set value changing unit that changes a set value of an operation signal of an oil supply pump, a burner motor, and a hot air motor with an output of the vaporizing cylinder temperature detecting device, wherein the vaporizing cylinder temperature detecting device sets a temperature detection level of a plurality of stages. A setting unit for changing the set values of the operation signal of the refueling pump and the burner motor of the combustion amount setting unit and the operation signal of the hot air motor via the set value changing unit based on the result of comparison with the temperature detection level; The combustion is stopped based on the result of comparison with the temperature detection level set as the upper limit.

The vaporization cylinder temperature is detected in a plurality of stages by utilizing the characteristic that the vaporization cylinder temperature rises when the amount of air blows down due to dust attached to the suction port of the warm air fan and the temperature of the warm air rises. With this configuration, it is possible to detect the state of dust adhesion in a change state of the vaporization cylinder temperature, control the combustion amount to decrease before the vaporization cylinder temperature abnormally rises, and increase the air blowing amount, And reduce the temperature of the combustion cylinder to maintain an appropriate temperature. As a result, it is possible to prevent yellow fire combustion due to a rise in the temperature of the vaporizing cylinder and a flashback phenomenon due to a rise in the temperature of the combustion cylinder.

Further, the invention according to claim 2 has a configuration in which a detection level correction unit for correcting the temperature detection levels set in a plurality of stages in accordance with the combustion amount is provided in the vaporization cylinder temperature detection device.

Then, the temperature detection level is corrected in the same tendency according to the change characteristic of the vaporization cylinder temperature accompanying the change in the combustion amount, so that the state of dust adhesion when the vaporization cylinder temperature exceeds the temperature detection level can be reduced. Irrespective of the condition.

Further, the invention according to claim 3 has a configuration in which the vaporizing cylinder and the combustion cylinder are provided in a blowing path of a hot air fan.

The temperature of the burner, that is, the temperature of the vaporizing cylinder is set to be easily affected by the temperature of the hot air, so that the temperature of the vaporizing cylinder increases when the temperature of the hot air increases when dust adheres, thereby increasing the detection accuracy. ing.

The invention according to claim 4 is configured so that the operating state is notified by the notifying section based on the comparison result of the comparator set arbitrarily.

By displaying the dust detection state by a signal of a predetermined temperature detection level, the user is notified and the removal of the dust can be prompted in advance.

According to a fifth aspect of the present invention, there is provided a pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, and a vaporizing cylinder for the vaporizing cylinder. A vaporization cylinder temperature detecting device for detecting a temperature, a combustion control unit for controlling a combustion amount and a sequence, a combustion amount setting unit for setting operation signals of the refueling pump and the burner motor with a signal from the combustion control unit, A pump control unit for controlling a refueling pump, a burner motor control unit for controlling a burner motor, a combustion cylinder for burning a mixed gas of vaporized fuel and air, and a heat exchanger for heat exchange of the combustion gas, A hot air fan attached to a hot air motor for sending air to the heat exchanger and blowing the hot air into a room; a hot air amount setting unit for setting an air blowing amount of the hot air fan; A first set value changing unit for changing set values of operation signals of a refueling pump, a burner motor, and a hot air motor based on an output of the vaporizing cylinder temperature detecting device; A second set value changing unit configured to change a set value of an operation signal of the refueling pump, the burner motor, and the hot air motor at an output of the device, wherein the vaporizing cylinder temperature detecting device and the hot air temperature detecting device each have a plurality of temperature detection levels. The operation signal of the refueling pump and the burner motor of the combustion amount setting unit and the hot air are set via the first set value changing unit or the second set value changing unit according to the result of comparison with the temperature detection level. The configuration is such that the set value of the operation signal of the motor is changed, and the combustion is stopped based on the result of comparison with the temperature detection level set at the upper limit.

By detecting an abnormal temperature rise of the hot air temperature at the time of dust adhesion at both the vaporizing cylinder temperature and the hot air temperature, when a certain amount of dust adheres regardless of the combustion amount. In addition, an operation of lowering the temperature of the hot air or an operation of stopping combustion can be performed to prevent an abnormal rise in temperature of each part of the device main body.

According to a sixth aspect of the present invention, the operating state is notified by the notification unit based on the comparison result of the comparators arbitrarily set among the comparators provided in a plurality of stages in the vaporizing cylinder temperature detecting device and the hot air temperature detecting device. It is configured to notify.

The dust detection state is indicated by a signal of one of the temperature detection levels of the vaporizing cylinder temperature and the hot air temperature, so that when a certain amount of dust adheres irrespective of the combustion amount, the user is notified. It can notify and prompt the removal of dust in advance.

The invention according to claim 7 is characterized in that the operation of the preceding stage is performed when the output of the comparison result disappears due to a decrease in the detected temperature except for the temperature detection level set at the uppermost limit of the vaporizing cylinder temperature detecting device and the hot air temperature detecting device. The configuration is as follows.

When the temperature of the hot air drops below the detection level due to the operation of lowering the temperature of the hot air after the detection of the abnormal temperature rise, the hot air temperature is returned to the previous state and brought close to the normal state. We aim to improve usability.

In the invention described in claim 8, the vaporizing cylinder temperature detecting device includes a first temperature detecting level for controlling a normal vaporizing cylinder temperature and a second temperature detecting level for further detecting that the temperature has risen.
The apparatus has a temperature detection level, a third temperature detection level for detecting that the temperature has further risen, and a fourth temperature detection level for detecting a temperature at which the final combustion is stopped. A fifth temperature detection level for detecting that the temperature has further increased, and a sixth temperature detection level for detecting that the temperature has further increased.
It comprises a temperature detection level and a seventh temperature detection level for detecting a temperature at which the final combustion is stopped, and a first set value changing unit by a signal of the second temperature detection level or a second set value by a signal of the fifth temperature detection level. The operation signal of the refueling pump and the burner motor is lowered by one stage and the operation signal of the hot air motor is raised by one stage via the change unit, and the first set value change unit or the sixth temperature is changed by the signal of the third temperature detection level. According to the signal of the detection level, the operation signal of the refueling pump and the burner motor is further decreased by one step and the operation signal of the hot air motor is further increased by one step via the second set value changing unit, and at the same time, the operation state is displayed on the display unit. And the combustion is stopped by the signal of the fourth temperature detection level or the signal of the seventh temperature detection level.

The abnormal temperature rise detection levels for the vaporizing cylinder temperature and the hot air temperature are configured in three stages, and the signal of the first stage detection level is used to change to a set value one stage lower than the combustion amount at the time of detection. Perform the operation of lowering the hot air temperature by changing to the set value one step higher than the air flow rate of, and change the combustion level further lower by the signal of the second detection level, and change the air flow further higher by one step In addition to performing the operation of lowering the hot air temperature, the abnormal temperature rise is notified by lighting a lamp, etc., and the combustion is stopped by the signal of the third detection level. The optimum detection level is set so that the components do not exceed the heat resistant temperature and the combustion is not frequently stopped by dust detection.

According to a ninth aspect of the present invention, the vaporizing cylinder temperature detecting device includes a first temperature detecting level for controlling a normal vaporizing cylinder temperature, a second temperature detecting level for further detecting that the temperature has risen, Further, there is a third temperature detection level for detecting that the temperature has risen, and a fourth temperature detection level for detecting the temperature at which the final combustion is stopped. The hot air temperature detecting device detects that the hot air temperature has risen above normal. A fifth temperature detection level to be detected, a sixth temperature detection level to detect that the temperature has further increased, and a seventh temperature to detect the temperature at which the final combustion is stopped.
An operating state is notified by a notification unit by a signal of a third temperature detection level or a signal of a sixth temperature detection level, and combustion is performed by a signal of a fourth temperature detection level or a signal of a seventh temperature detection level. Is stopped, and a display for displaying a temperature or the like is used to display the value in such a manner that the cause of the combustion stop can be recognized.

Then, a signal of the second detection level of the abnormal temperature rise detection level of the hot air temperature is used to notify by lighting the lamp, etc., to promote dust removal in advance, and the combustion is stopped by the third detection level signal. At the same time, an indicator or the like for displaying the room temperature is used to make it possible to know that the combustion has stopped due to dust adhesion, thereby improving usability and maintainability.

According to a tenth aspect of the present invention, the vaporizing cylinder temperature detecting device comprises: a first temperature detecting level for controlling a normal vaporizing cylinder temperature; a second temperature detecting level for further detecting that the temperature has risen; Further, there is a third temperature detection level for detecting that the temperature has risen, and a fourth temperature detection level for detecting the temperature at which the final combustion is stopped. The hot air temperature detecting device detects that the hot air temperature has risen above normal. A fifth temperature detection level for detecting that the temperature has risen, a sixth temperature detection level for detecting that the temperature has further risen, and a seventh temperature detection level for detecting a temperature at which the final combustion is stopped; As a result, the operation signal of the refueling pump and the burner motor is lowered by one step from the signal of the first set value change section or the signal of the fifth temperature detection level via the second set value change section, and the operation signal of the hot air motor is raised by one step. The operation signal of the refueling pump and the burner motor is further reduced by one step from the signal of the third temperature detection level via the first set value changing unit or the second set value changing unit by the signal of the sixth temperature detection level, and The operation signal of the hot air motor is further increased by one step, and when the operation signal set value at the time of the change is the lower limit value, the combustion is stopped and only the hot air motor is operated with the changed operation signal, and the vaporization cylinder temperature or When the hot air temperature decreases to the second temperature detection level or the fifth temperature detection level, the combustion operation is restarted.

When the abnormal air temperature of the hot air is detected and the amount of air and the amount of air blown are at the lower limit of the normal combustion range, the combustion is stopped, and only the hot air motor increases the amount of air blown by one step. Continue until the temperature or hot air temperature drops to the first detection level of the abnormal temperature detection level, and restart the combustion operation at the time when the temperature or hot air temperature drops so as to avoid danger due to the abnormal rise in the hot air temperature. I have.

The invention according to claim 11 provides a pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, and a vaporizing cylinder for the vaporizing cylinder. A vaporization cylinder temperature detecting device for detecting a temperature, a combustion control unit for controlling a combustion amount and a sequence, a combustion amount setting unit for setting operation signals of the refueling pump and the burner motor with a signal from the combustion control unit, A pump control unit for controlling a refueling pump, a burner motor control unit for controlling a burner motor, a combustion cylinder for burning a mixed gas of vaporized fuel and air, and a heat exchanger for heat exchange of the combustion gas, A hot air fan attached to a hot air motor for sending air to the heat exchanger and blowing it out as hot air into a room; a hot air amount setting unit for setting an air blowing amount of the hot air fan; A louver disposed at the outlet to control the opening of the outlet according to the amount of combustion, an open / close detector for detecting the open / closed state of the louver, an oil supply pump, a burner motor, and hot air based on the output of the carburetor temperature detector. A first set value changing unit for changing a set value of an operation signal of the motor, wherein the vaporizing cylinder temperature detecting device has a temperature setting unit in which a plurality of temperature detection levels are set, and a comparison result with the temperature detection level is provided. Changes the setting values of the operation signal of the refueling pump and the burner motor and the operation signal of the hot air motor of the combustion amount setting unit via the first setting value changing unit, and forcibly sets the louver by the signal of the first setting value changing unit. When the opening / closing operation is not performed and there is no opening / closing signal, combustion is stopped.

In the louver for controlling the opening of the hot air outlet in accordance with the amount of combustion, when an abnormal rise in the temperature of the hot air is detected, the opening and closing of the louver is checked. After confirming whether or not the temperature has risen, a dust detection operation is performed to reliably determine whether or not the temperature of the hot air is abnormally increased due to dust adhesion.

[0041]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) First, the configuration of a closed-type combustor using a combustion control apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. Reference numeral 1 denotes an oil supply pump that supplies fuel from an oil tank installed outside or a built-in oil tank to the nozzle unit 2. Reference numeral 3 denotes a burner motor, and a fan 4 for rotating and atomizing the fuel discharged from the nozzle 2 on its shaft.
And a burner fan 5 for supplying combustion air. Reference numeral 6 denotes a vaporizing cylinder, in which a heater 7 is buried, and a vaporizing cylinder temperature detector 8, a temperature detecting section 9, a first temperature setting section 10, and a first comparator 11 detect the vaporizing cylinder temperature and control the heater control section 1.
2, the temperature is controlled to a predetermined value. The atomized fuel is gasified in the vaporizing cylinder 6 heated to the predetermined temperature and mixed with air supplied by the burner fan 5 to form a combustion cylinder 13.
Send to Reference numeral 12a denotes an ignition electrode which is disposed near the combustion tube 13 and discharges with the combustion tube 13 in a predetermined sequence to perform an ignition operation. Reference numeral 14 denotes a combustion chamber, which is a place for completely burning the combustion gas burned in the combustion tube 13. 1
5 is a heat exchanger provided in the discharge path of the combustion gas,
The hot air fan 17 attached to the hot air motor 16 mixes with the room air taken in from the air inlet 18 and blows out the hot air from the outlet 19 through a blowing path 38 provided along a blowing duct 37. 20 is an air supply path, a path for taking in combustion air from outside, 21 is an exhaust path, a path for discharging combustion gas outside, and 22 is a combustion cylinder 1
The flame detection is performed by the ionic current flowing through the flame at the time of combustion with the flame rod that is disposed in the vicinity of 3 and inserted into the combustion flame. Reference numeral 23 denotes an operation unit, 23a denotes a notification unit, and 24 denotes a combustion control unit, which starts operation by a signal from the operation unit 23 and outputs an operation signal for load control based on a preset control operation. Reference numeral 25 denotes a combustion amount setting unit which supplies an operation signal to a pump control unit 26 and a burner motor control unit 27 to operate the oil supply pump 1 and the burner motor 3 at predetermined operation set values. 28
Is a hot air volume setting unit that operates the hot air motor 16 via the hot air motor control unit 29 at a predetermined operation set value. Reference numeral 30 denotes a second temperature setting unit which sets a second temperature detection level for detecting the vaporization cylinder temperature, and compares the temperature level of the temperature detection unit 9 with the second comparator 31 to detect the degree of increase in the vaporization cylinder temperature. I do. A third temperature setting unit 32 sets a third temperature detection level higher than the second temperature detection level. The third temperature setting unit 32 compares the temperature level of the temperature detection unit 9 with the third comparator 33 to determine the vaporization cylinder temperature. Detecting degree of rise and reporting section 2
The operation state is displayed at 3a. Reference numeral 34 denotes a fourth temperature setting unit which sets a fourth temperature detection level which is set higher than the third temperature detection level. The fourth temperature setting unit 34 compares the level with the temperature detection unit 9 with a fourth comparator 35, and compares the comparison result. It is sent to the combustion control unit 24 to stop the combustion. A set value changing unit 36 changes the operation set values of the combustion amount setting unit 25 and the hot air volume setting unit 28 based on the comparison result of the second comparator 31 and the third comparator 33.

FIGS. 2A and 2B show a change in the temperature of the vaporizing cylinder when dust adheres. FIG. 2A shows a temperature change in the vicinity of the temperature detector, and FIG. 2B shows a temperature change in the highest part of the vaporizing cylinder. Things.

Next, the operation of the combustion control device configured as described above will be described with reference to FIG. First, when an operation signal is input from the operation / display unit 23, the combustion control unit 2
4 sends a signal to the heater control unit 12 to energize the heater 7 embedded in the vaporizing cylinder 6 to start the heating operation. The temperature signal from the vaporizing cylinder temperature detector 8 is detected by the temperature detecting unit 9,
The temperature of the vaporizing cylinder 6 is set to the first temperature set by the first temperature setting unit 10.
When the temperature rises above the detection level, a motor operation signal is sent from the combustion control unit 24 to the combustion amount setting unit 25, and a preset motor operation output is supplied to the burner motor 3 via the burner motor control unit 27. The burner motor 3 starts rotating with this output, and the burner fan 5 attached to the burner motor shaft.
The combustion air is taken in from the outdoor through the air supply path 20 to start the pre-purge operation. When the pre-purge time elapses, a pump operation signal is sent from the combustion control unit 24 to the combustion amount setting unit 25, and the pump control unit 26 Supplies a preset pump operation output to the refueling pump 1. The refueling pump 1 starts operating with this output, and discharges fuel from the nozzle unit 2. The discharged fuel is atomized by a fluffy fan 4 attached to the tip of the burner motor shaft and is sprayed on the inner wall surface of the vaporizing cylinder 6. Since the vaporizing cylinder 6 is heated to a high temperature, the sprayed fuel is vaporized and gasified and supplied to the combustion cylinder 13. At the same time, it mixes with the combustion air supplied by the burner fan 5 and blows out from the flame port of the combustion cylinder 13. At this time, the discharge of the ignition electrode 12a is performed, and the mixed gas is ignited. When ignited, a flame is formed at the flame opening of the combustion tube 13 and combustion continues.

Next, when the combustion is started, the combustion is detected by the flame rod 22 disposed in the flame, and the ignition operation is completed. When the combustion is continued and the temperature of the heat exchanger 15 rises, an operation signal of the hot air motor 16 is sent from the combustion control unit 24 to the hot air volume setting unit 28, and the operation signal is preset through the hot air motor control unit 29. Warm air motor operation output
6 The hot air motor 16 starts operating at this output, draws in room air from the suction port 18 by the hot air fan 17, exchanges heat with the heat exchanger 15 in a high temperature state, and passes through the blowing path 38 to the outlet. It blows out as warm air from 19.

The temperature of the vaporizing cylinder at this time is between the first detection level (T1) and the second detection level (T2) as indicated by T5 in FIG. In this state, when dust starts to adhere to the warm air air suction port 18, the same state as the opening of the suction port 18 becomes smaller, and the amount of blown air gradually decreases. When the amount of air blows decreases, the amount of heat exchange in the heat exchanger 15 decreases, the temperature of the heat exchanger 15 gradually increases, and the temperature of the hot air also gradually increases. The temperature of the burner also increases. As the temperature of the burner increases, the temperature of the vaporizing cylinder also gradually increases as shown in FIG. As the dust adhesion progresses, the air volume decreases further,
When the vaporization cylinder temperature reaches the detection level (T2), the second comparator 31 sends the comparison result to the set value changing unit 36 to change the operation set values of the combustion amount setting unit 25 and the hot air amount setting unit 28. To That is, the operation set values of the refueling pump 1 and the burner motor 3 are lowered by a predetermined level to reduce the amount of combustion, and the operation set value of the hot air motor 16 is raised by a predetermined level to increase the blown air amount, thereby lowering the hot air temperature. To change. If the temperature of the vaporizing cylinder decreases by this operation, the combustion is continued. If the warm air temperature, that is, the vaporization cylinder temperature continues to rise despite the above operation, when the third detection level (T3) is reached, the third comparator 33 compares the comparison result with the set value change unit 36.
To further update the operation set values of the combustion amount setting unit 25 and the hot air amount setting unit 28. That is, the operation set values of the refueling pump 1 and the burner motor 3 are further reduced by a predetermined level to reduce the amount of combustion, and the operation set value of the hot air motor 16 is further raised by a predetermined level to increase the blown air amount, thereby increasing the hot air temperature. Aim to decrease. At the same time, the notification unit 23a turns on a lamp for notifying the dust adhesion state. If the vaporization cylinder temperature is reduced by the above operation, the combustion is continued. If the warm air temperature, that is, the vaporization cylinder temperature continues to increase despite the above operation, when the fourth detection level (T4) is reached, the fourth comparator 35 sends the comparison result to the combustion control unit 24 to stop the combustion. I try to make it.

As described above, by utilizing the characteristic that the temperature of the vaporizing cylinder rises when the amount of blown air decreases due to dust adhering to the suction port of the warm air fan and the temperature of the warm air rises, vaporization of the vaporizing cylinder from the change of the vaporizing cylinder temperature takes place. By operating to lower the cylinder temperature or stopping the combustion, it is possible to reliably prevent the yellow fire combustion due to the rise in the vaporization cylinder temperature and the flashback phenomenon due to the rise in the combustion cylinder temperature.

(Embodiment 2) First, the configuration of a closed-type combustor using a combustion control apparatus according to Embodiment 2 of the present invention will be described with reference to FIG.

Since the basic configuration is almost the same as that of the first embodiment, the same reference numerals are given and the description is omitted. In the second embodiment, the second temperature detection level set by the second temperature setting unit 30, the third temperature setting unit 32, and the fourth temperature setting unit 34 by the detection level correction unit 40 according to the operation set value of the combustion amount setting unit 25. And the third temperature detection level and the fourth temperature detection level are corrected.

FIG. 4 is a diagram showing the relationship between the amount of combustion, the temperature of the vaporizing cylinder, and the respective detection levels. The combustion control device configured as described above will be described with reference to FIG.

As shown in FIG. 4 (C), the temperature of the vaporizing cylinder changes according to the amount of combustion. Here, when dust starts to adhere to the suction port 18 of the warm air, the temperature of the warm air increases, and accordingly, the temperature of the vaporizing cylinder also increases, and shifts to a characteristic as shown in FIG. . Furthermore, when dust adhesion progresses,
As (E) shifts and more dust adheres, (F) shifts.
The characteristic curve of the amount of combustion and the temperature of the carburetor shifts upward.

When the temperature detection level is set to a certain fixed value in such a device having such characteristics, the dust adhesion state when performing dust detection greatly differs depending on the amount of combustion. For example, in FIG. 4, when the second temperature detection level is fixed to (2), in the case of "weak" combustion, dust is detected by dust adhesion (D), that is, the first temperature detection unit 9
The second comparator 31 performs an operation of detecting that the temperature exceeds the second temperature detection level. In the case of "strong" combustion, dust detection is not performed unless the process proceeds to dust adhesion (G).

In the configuration of the second embodiment, a detection level correction unit 40 is provided, and a signal corresponding to a change in the combustion amount is sent from the combustion amount setting unit 25 to the second temperature setting unit 30, the third temperature setting unit 32, and the fourth temperature setting unit. 34, the temperature detection level is corrected stepwise as shown in FIG. 4, or the temperature detection level is corrected steplessly in accordance with the amount of combustion, thereby performing dust detection when performing dust detection. Is kept from changing so much depending on the amount of combustion. For example, the correction operation of the second temperature detection level when the detection level is corrected in three stages in FIG. 4 will be described.
When the combustion amount is "medium 1", the level of the second temperature detection level is set to (2) via the detection level correction unit 40, and when the combustion amount becomes "medium 1" to "medium 2," 2 Change the temperature detection level to level (2) 'and change the combustion amount from "medium 2" to "strong".
, The second temperature detection level is changed to level (2) ", and the dust adhesion state when dust detection is performed is performed between (D) to (F) regardless of the amount of combustion.

If the correction step of the temperature detection level is set finely, the state of dust adhesion when dust detection is performed can be further reduced.

The same effect can be obtained by similarly correcting the third temperature detection level and the fourth temperature detection level.

As described above, by correcting the temperature detection level in accordance with the amount of combustion, it is possible to make the dust adhesion state constant when detecting dust regardless of the amount of combustion.

Further, in the structure of the first and second embodiments, the vaporizing cylinder 6 and the combustion cylinder 13 are
8 to suppress the temperature rise of the burner portion during normal combustion and increase the amount of change in the vaporization cylinder temperature when the warm air temperature rises due to dust adhering to the suction port 18 of the warm air.
The accuracy of dust detection is improved.

(Embodiment 3) First, the configuration of a closed-type combustor using a combustion control apparatus according to Embodiment 3 of the present invention will be described with reference to FIG.

The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Differences will be described below.

The third embodiment operates to reduce the temperature of the hot air or to stop the combustion in a state where both the temperature of the vaporizing cylinder and the temperature of the hot air change, and the state of dust adhesion at the time of these operations. 41 is provided in the air duct 37 to detect the temperature of the hot air, and 42 is a hot air temperature detector for detecting the hot air temperature. Is a second temperature detecting unit for converting the signal of the air temperature into a temperature level.
The fifth temperature setting unit, which has set the temperature detection level, compares the temperature level of the second temperature detection unit 42 with the fifth comparator 44 to detect the degree of increase in the hot air temperature. Reference numeral 45 denotes a sixth temperature setting unit which sets a sixth temperature detection level which is higher than the fifth temperature detection level. The sixth temperature setting unit 45 compares the temperature level of the second temperature detection unit 42 with the sixth comparator 46, The operation degree is displayed on the operation / display unit 23 while the degree of temperature rise is detected. A seventh temperature setting section 47 sets a seventh temperature detection level set to a level higher than the sixth temperature detection level, and compares the temperature level of the second temperature detection section 42 with a seventh comparator 48. The comparison result is sent to the combustion control unit 24 to stop the combustion. 4
Reference numeral 9 denotes a second set value changing unit which changes the operation set values of the combustion amount setting unit 25 and the hot air amount setting unit 28 based on the signals of the fifth comparator 44 and the sixth comparator 46.

FIG. 6 shows the relationship between the amount of combustion and the temperature of the vaporizing cylinder and the temperature of the hot air. Next, the operation of the combustion control device configured as described above will be described with reference to FIG.

As described in the second embodiment, the relationship between the vaporizing cylinder temperature and the combustion amount is as follows.
It increases as the amount of combustion decreases. Conversely, the relationship between the hot air temperature and the combustion amount decreases as the combustion amount increases, and decreases as the combustion amount decreases. In the third embodiment, by using the contradictory characteristics, the operation of decreasing the hot air temperature or the operation of stopping the combustion is performed in the changing state of both the vaporizing cylinder temperature and the hot air temperature, and the operation is performed. An object of the present invention is to solve the problem that the dust adhesion state during operation greatly differs depending on the amount of combustion. For example, in FIG. 6, during the combustion amount “medium 2” to “weak”, the vaporization cylinder temperature reaches the second temperature detection level or the fifth temperature detection level at the time of dust adhesion earlier than the combustion amount “medium 2”. Is between the second temperature detection level and the fifth temperature when dust adheres.
The warm air temperature reaches the temperature detection level earlier. At this time, the comparator which has reached the second temperature detection level or the fifth temperature detection level earlier, that is, the second comparator 31 or the fifth
The output of the comparator 44 determines whether the first set value change unit 36 or the second set value
As in the operation of the first embodiment, the amount of combustion and the amount of hot air are controlled via the set value changing unit 49 so as to lower the temperature of hot air. The operation of lowering the hot air temperature can be performed with the output of an arbitrary comparator having a temperature detection level set in a plurality of stages. In addition, the operation / display unit 23 notifies the state of dust adhering to the suction port 18 with an output of the comparator set arbitrarily, and burns via the combustion control unit 24 with the output of the comparator set at the highest level. I'm trying to stop.

As described above, the operation of lowering the temperature of the hot air or the operation of stopping the combustion is performed in the changing state of both the temperature of the vaporizing cylinder and the temperature of the hot air. Temperature can be detected in a constant state regardless of the combustion amount.Temperature detection levels are provided in multiple stages, and the operation of lowering the hot air temperature is performed based on the results of the temperature detection unit and the comparator based on the temperature detection level. By doing so, it is possible to suppress abnormal rises in the temperature of the hot air and the temperature of the vaporizing cylinder, and similarly, by reporting that dust is attached to the suction port based on the result of the temperature detection unit and a comparator based on an arbitrary temperature detection level, Dust removal can be encouraged in advance, thereby improving usability.

Further, in the configuration of the third embodiment, the combustion is stopped via the combustion control unit 24 by the outputs of the fourth comparator 35 and the seventh comparator 48 set to the uppermost limit, and the second set lower than that is set.
The output of the comparator 31, the third comparator 33, the fifth comparator 44, and the sixth comparator 46 is used by the first setting changing unit 36 or the second setting changing unit 49 to set the combustion amount setting unit 25 and the hot air amount setting unit 28.
When the outputs of the second comparator 31, the third comparator 33, the fifth comparator 44, and the sixth comparator 46 are extinguished, the combustion amount setting unit 25 and the hot air amount setting unit 28
Is returned to the set value before the change. That is, the second comparator 31, the third comparator 33, and the fifth comparator other than the fourth comparator 35 and the seventh comparator 48 set at the uppermost limit.
The output of the comparator 44 and the sixth comparator 46 reduce the combustion amount by a predetermined amount from the combustion amount at the time of detection, and
The hot air flow is increased by a preset amount from the hot air flow at the time of detection to lower the hot air temperature, and the first air temperature detecting unit 9 or the second temperature When the temperature of the detection unit 42 falls below the temperature detection level that has exceeded the temperature level and the output of the comparator ceases, the amount of combustion is increased by the previously reduced amount, and the amount of the hot air is increased first. It is reduced by only approximating the normal combustion state to improve the usability.

Further, the temperature detection levels for detecting the temperature rises of the vaporization cylinder temperature and the hot air temperature are set at three stages, and the operation is performed at the lowest temperature detection level by the rise of the vaporization cylinder temperature or the hot air temperature. The first setting change unit 36 and the second setting change unit 4 output the output of the second comparator 31 and the fifth comparator 44, respectively.
9, the number of preset control stages is reduced by one stage, and the amount of hot air is also increased by one stage of the preset control stages, and the temperature of the vaporizing cylinder or the temperature of hot air continues to rise. Third comparator 33, sixth comparator 46 in the second stage
With the output of, the first setting change unit 36 and the second setting change unit 49 further decrease by one step and the amount of hot air further increases by one step, and the notification unit 23a collects dust at the suction port 1.
8 if the temperature of the vaporizing cylinder or the temperature of the hot air rises.
The combustion is stopped via the combustion control unit 24 by the output of the fourth comparator 35 and the seventh comparator 48 of the stage.

As described above, by setting the temperature detection level of the abnormal temperature rise to three levels, and performing the operation of lowering the temperature of the hot air and stopping the combustion, the abnormal temperature rise of the components such as the vaporizing cylinder can be avoided. Safety can be ensured. Further, by providing the lower two temperature detection levels and performing the operation of lowering the temperature of the hot air, it is possible to suppress the frequent occurrence of the combustion stoppage due to the abnormal rise in the temperature of the hot air, thereby achieving both ease of use and safety. it can.

Further, as shown in FIG. 7, prior to the abnormal stop, a notice for prompting the removal of dust and a display for displaying the room temperature or the like at the time of the abnormal display are used so that it is possible to recognize that the stop has occurred by the dust detection. . That is, the dust detection lamp of the notification unit 23a is turned on by the output of the third comparator 33 based on the third temperature detection level set in the middle stage and the sixth comparator 46 based on the sixth temperature detection level, and the fourth stage set in the uppermost stage Fourth comparator 35 and seventh temperature detection level 4 based on temperature detection level
8, the output of the seventh comparator 48 indicates that the combustion has stopped due to dust adhesion. For example, as shown in FIG. 7, a 7-segment LED is used to display a symbol and a number. In addition, any configuration may be used as long as a similar effect is obtained by using a liquid crystal or the like.

Further, when the temperature of the hot air and the temperature of the vaporizing cylinder are raised to lower the temperature of the hot air when the temperature rise is detected and the set value of the combustion amount when the temperature rise is detected is the lower limit value, the combustion amount is reduced. The operation should be stopped to stop the combustion, raise the operation signal of the hot air motor only by one step, continue the operation, and when the vaporization cylinder temperature or the hot air temperature falls to the temperature detection level set at the lowest level, the combustion is re-established. It is composed. In other words, the temperature of the vaporizing cylinder or the temperature of the hot air rises due to dust,
When the temperature reaches the temperature detection level, the third temperature detection level, the fifth temperature detection level, or the sixth temperature detection level, the second comparator 31 and the third comparator 33 cause the first setting change unit 36 or the fifth comparator 44 to The refueling pump 1 and the burner motor 3 change the operation set values of the combustion amount setting unit 25 and the hot air volume setting unit 28 by the sixth comparator 46 via the second setting changing unit 49 so as to lower the hot air temperature. Although the hot air motor 16 is controlled, when the operation set value of the combustion amount setting unit 25 is changed, if the set value is already at the lowest stage, the operation of the refueling pump 1 and the burner motor 3 is stopped to stop combustion. The hot air flow operates to increase the operation set value of the hot air flow setting unit 28 by one step. With this operation, the vaporizing cylinder temperature and the hot air temperature start to decrease, and the combustion operation is restarted when the temperature decreases to the second temperature detection level or the fifth temperature detection level.

As described above, when dust detection is performed when the amount of combustion is at the lower limit, the combustion is stopped and the amount of hot air is increased in order to avoid an abnormal rise in the temperature of components such as the vaporizing cylinder.
The operation is performed to decrease the temperature of the vaporizing cylinder or the temperature of the hot air to ensure safety. When the temperature decreases and decreases to the temperature detection level set at the lowermost limit, combustion is restarted to improve the usability.

(Embodiment 4) First, the configuration of a closed combustor using a combustion control apparatus according to Embodiment 4 of the present invention will be described with reference to FIG.

Since the basic structure is almost the same as that of the first embodiment, the same reference numerals are given and the description is omitted. The invention of the fourth embodiment uses a louver 19 for controlling the outlet of the hot air outlet.
a related to a combustor equipped with a.
When dust adheres to 8 and the vaporization cylinder temperature reaches the second temperature detection level, an operation signal is supplied from the second comparator 31 to the louver driving section 50 via the first set value changing section 36 to drive the stepping motor 51. The louver 19a is opened and closed. This opening / closing state is detected by the detector 52, and the signal is supplied to the opening / closing detection section 53. If the opening / closing signal is normally supplied, the louver 19a is returned to the original state, and the dust detection operation is continued, and the normal state is obtained. If no open / close signal is input,
When it is determined that the louver 19a is abnormal, the combustion control unit 2
4 to stop the combustion.

As described above, in the configuration in which the louver 19a performs the hot air blowing control, the abnormal check of the louver 19a at the time of dust detection makes it possible to determine whether or not the abnormal rise of the hot air temperature is caused by dust adhesion. It is possible to improve usability.

In the above embodiment, the closed type combustor has been described, but in addition to this, the combustion control device having the above configuration can be applied to a combustor having this kind of problem.

[0074]

As described above, according to the first aspect of the present invention, when the amount of air blows down due to dust attached to the suction port of the warm air fan and the temperature of the warm air rises, the vaporizing cylinder temperature rises. By making the temperature detection level of the carburetor cylinder temperature in multiple stages, it is possible to detect the dust adhesion state in the carburetor cylinder temperature change state, and the amount of combustion before the carburetor cylinder temperature rises abnormally. By controlling so as to reduce the air flow and the amount of air blown, the temperature of the hot air can be reduced, and the temperatures of the vaporizing cylinders and the combustion cylinders can be reduced and maintained at appropriate temperatures. In particular, when the combustion temperature is high and the combustion cylinder temperature is high and the combustion amount is small, it is possible to prevent the yellow fire combustion due to the rise in the vaporization cylinder temperature and the flashback phenomenon due to the rise in the combustion cylinder temperature, thereby ensuring the safety of the equipment. Furthermore, if the temperature of the vaporizing cylinder rises even in these operations, the combustion is stopped, and the safety of the equipment can be ensured.

According to the second aspect of the present invention, the temperature detection level is corrected to have the same tendency according to the change characteristic of the vaporization cylinder temperature accompanying the combustion change, so that the vaporization cylinder temperature exceeds the temperature detection level. The state of dust adhesion at that time can be made constant regardless of the amount of combustion.

According to the third aspect of the invention, the temperature of the burner, that is, the temperature of the vaporizing cylinder and the combustion cylinder is easily affected by the temperature of the hot air. The temperature rising tendency can be increased, and the detection accuracy can be increased.

According to the fourth aspect of the present invention, it is possible to notify the user by displaying the dust detection state by a signal of the predetermined temperature detection level and to prompt the user to remove the dust in advance.

According to the fifth aspect of the present invention, an abnormal temperature rise of the hot air temperature at the time of dust adhesion is detected at both the vaporizing cylinder temperature and the hot air temperature. By taking advantage of the fact that the temperature change at the time of the change in the amount of combustion of the hot air temperature is a characteristic that is contradictory, when a certain amount of dust adheres regardless of the amount of combustion, the operation of lowering the temperature of the hot air or the combustion By performing the operation of stopping, it is possible to prevent abnormal temperature rise of each part of the device main body. That is, when the combustion amount is large, the temperature is detected by the hot air temperature, and when the combustion amount is small, it is detected that dust has adhered due to a change in the vaporization cylinder temperature. An operation of lowering the wind temperature or an operation of stopping combustion can be performed.

According to the sixth aspect of the present invention, the dust detection state is indicated by a signal of one of the temperature detection levels of the vaporizing cylinder temperature and the hot air temperature, so that a certain amount of dust is detected regardless of the combustion amount. When the dust adheres to the user, the user can be notified of the dust in advance.

According to the seventh aspect of the present invention, when the hot air temperature falls below the detected temperature detection level by the hot air temperature lowering operation after the abnormal temperature rise detection, the combustion amount and the blowing air amount are reduced by one step. By returning the state to the normal state and returning the warm air temperature to the normal state, the usability can be improved.

According to the eighth aspect of the invention, the abnormal temperature rise detection levels of the vaporizing cylinder temperature and the hot air temperature are configured in three stages, and the combustion amount when the combustion amount is detected at the first stage temperature detection level. Change the set value to one step lower than the set value, change the blow rate to the set value one step higher than the set value at the time of detection, and perform the operation of lowering the hot air temperature. Change the set value to one step lower than the combustion amount, change the blowing amount to a setting value one step higher than the detected air amount, perform the operation of lowering the hot air temperature, and turn on the lamp on the operation / display unit to indicate the abnormal temperature. The rise is notified and the combustion is stopped at the third detection level so that the abnormal rise in the temperature of the hot air does not cause the vaporizing cylinder and the main body components to exceed the heat-resistant temperature. So that combustion does not stop It is possible to set the optimum temperature detection level in consideration of the balance of goodness for all of the security and usability.

According to the ninth aspect of the present invention, the lamp is turned on at the second temperature detection level of the abnormal temperature rise detection level of the hot air temperature to prompt the removal of dust in advance, and the third level detection is performed. When the combustion is stopped at the level, it is possible to use a display or the like for displaying the room temperature so that it can be known that the combustion has been stopped by the adhesion of dust, thereby improving usability and maintainability.

Further, according to the tenth aspect of the present invention, when the amount of combustion and the amount of air blown when the abnormal temperature rise of the hot air temperature is detected are the lower limit of the normal combustion range, the combustion is stopped, and only the amount of air blown With the air volume increased one step, the vaporization cylinder temperature and the hot air temperature continue until the abnormal temperature detection level drops to the first detection level, and when the temperature drops, the combustion operation is restarted and the hot air temperature rises abnormally The danger caused by can be avoided.

According to the eleventh aspect of the present invention, the louver for controlling the opening of the hot air outlet in accordance with the amount of combustion can open and close the louver when an abnormal temperature rise of the hot air temperature is detected. After checking and confirming whether the abnormal temperature rise due to louver malfunction, the dust detection operation can be performed to reliably determine whether the abnormal temperature rise due to dust adherence, improving usability. It is.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a combustor using a combustion control device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a vaporization cylinder temperature detection level when dust is detected by the combustion control device.

FIG. 3 is a configuration diagram of a combustor using a combustion control device according to a second embodiment of the present invention.

FIG. 4 shows the amount of combustion and the temperature of a carburetor cylinder in the combustion control device.
Diagram showing the relationship between each temperature detection level

FIG. 5 is a configuration diagram of a combustor using a combustion control device according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a relationship between a combustion amount, a vaporization cylinder temperature, and a hot air temperature when dust is detected by the combustion control device.

FIG. 7 is a diagram showing a display method in the combustion control device.

FIG. 8 is a configuration diagram of a combustor using a combustion control device according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a combustor using a conventional combustion control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel pump 3 Burner motor 5 Burner fan 6 Vaporization cylinder 8 Vaporization cylinder temperature detector 9 First temperature detection unit 10 First temperature setting unit 11 First comparator 12 Heater control unit 13 Combustion cylinder 15 Heat exchanger 16 Hot air motor 17 Hot air fan 23 Operation / display unit 24 Combustion control unit 25 Combustion amount setting unit 26 Pump control unit 27 Burner motor control unit 28 Hot air volume setting unit 29 Hot air motor control unit 30 Second temperature setting unit 31 Second comparison unit 32 Third Temperature setting unit 33 Third comparison unit 34 Fourth temperature setting unit 35 Fourth comparison unit 36 First set value changing unit 39 Vaporization cylinder temperature detection device 40 Detection level correction unit 41 Hot air temperature detector 42 Second temperature detection unit 43 Fifth temperature setting unit 44 Fifth comparing unit 45 Sixth temperature setting unit 46 Sixth comparing unit 47 Seventh temperature setting unit 48 Seventh comparator 49 Second setting value changing unit

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Yasuaki Tawa 1006 Kazuma Kadoma, Osaka Pref.Matsushita Electric Industrial Co., Ltd. (72) Inventor Shigeru Murakami 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (11)

[Claims] 1. A fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, and a vaporizing cylinder temperature for detecting the temperature of the vaporizing cylinder. A detection device, a combustion control unit for controlling a combustion amount and a sequence, a combustion amount setting unit for setting operation signals of the refueling pump and the burner motor by a signal from the combustion control unit, and a pump control for controlling the refueling pump. Unit, a burner motor control unit for controlling a burner motor, a combustion tube for burning a mixed gas of vaporized fuel and air, a heat exchanger for exchanging heat of the combustion gas, and a blower for the heat exchanger. A hot air fan attached to a hot air motor for blowing out hot air into the room, a hot air amount setting unit for setting a blowing amount of the hot air fan, and an output of the vaporizing cylinder temperature detecting device. A set value changing unit for changing set values of operation signals of the refueling pump, the burner motor, and the hot air motor is provided, and the vaporizing cylinder temperature detecting device detects a temperature detector attached to the vaporizing cylinder, and outputs a signal from the temperature detector to a temperature. A temperature detection unit for converting the data into data, a temperature setting unit for setting a plurality of temperature detection levels, and a comparator for comparing the temperature detection level set by the temperature setting unit with the temperature data of the temperature detection unit; According to the comparison result of the comparator, the set value of the operation signal of the refueling pump and the burner motor of the combustion amount setting unit and the set value of the operation signal of the hot air motor are changed via the set value changing unit, and the comparison result of the uppermost comparator is used. A combustion control device configured to stop combustion. 2. The combustion control device according to claim 1, further comprising a detection level correction unit that corrects the temperature detection levels of the temperature setting units set in a plurality of stages in the vaporization cylinder temperature detection device according to the amount of combustion. 3. The combustion control device according to claim 1, wherein the vaporizing cylinder and the combustion cylinder are provided in a blowing path of a hot air fan. 4. The combustion control device according to claim 1, wherein an operation state is notified by a notification unit based on a comparison result of the comparator set arbitrarily. 5. A fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, and a vaporizing cylinder temperature for detecting the temperature of the vaporizing cylinder. A detection device, a combustion control unit for controlling a combustion amount and a sequence, a combustion amount setting unit for setting operation signals of the refueling pump and the burner motor by a signal from the combustion control unit, and a pump control for controlling the refueling pump. Unit, a burner motor control unit for controlling a burner motor, a combustion tube for burning a mixed gas of vaporized fuel and air, a heat exchanger for exchanging heat of the combustion gas, and a blower for the heat exchanger. A hot air fan attached to a hot air motor for blowing air into the room as hot air, a hot air volume setting unit for setting the air flow of the hot air fan, and a hot air temperature detecting unit for detecting a hot air temperature. A first set value changing unit that changes setting values of operation signals of a refueling pump, a burner motor, and a hot air motor with an output of the vaporizing cylinder temperature detecting device; and a refueling pump and a burner motor with an output of the hot air temperature detecting device. And a second set value changing unit for changing a set value of an operation signal of the hot air motor, wherein the vaporizing cylinder temperature detecting device and the hot air temperature detecting device each have a temperature setting unit which sets a plurality of temperature detection levels. Then, based on the result of the comparison with the temperature detection level, the set values of the operation signal of the refueling pump and the burner motor and the operation signal of the hot air motor of the combustion amount setting unit via the first set value changing unit or the second set value changing unit. A combustion control device configured to change and stop combustion according to the upper limit comparison result. 6. An operating state is notified by a notifying unit based on a comparison result of a comparator arbitrarily set among a plurality of comparators provided in a plurality of stages in the vaporizing cylinder temperature detecting device and the hot air temperature detecting device. The combustion control device as described in the above. 7. The comparison between the temperature detection level of the vaporization cylinder temperature detector and the temperature detection level of the vaporization cylinder temperature detection apparatus disappears due to a decrease in the detected temperature, except for the temperature detection level set at the uppermost limit. 6. The combustion control device according to claim 5, wherein the operation returns to the previous operation when the operation is performed. 8. A vaporizing cylinder temperature detecting device detects a first temperature detecting level for controlling a normal vaporizing cylinder temperature, a second temperature detecting level for further detecting that the temperature has risen, and detecting that the temperature has further risen. A temperature setting unit that sets a third temperature detection level to perform and a fourth temperature detection level to detect a temperature at which the final combustion is stopped, and the hot air temperature detection device detects that the hot air temperature has risen above normal. A fifth temperature detection level;
A temperature setting section is provided which sets a sixth temperature detection level for detecting that the temperature has further risen and a seventh temperature detection level for detecting a temperature at which the final combustion is stopped, and based on a comparison result with the second temperature detection level. The operation signal of the refueling pump and the burner motor is lowered by one step and the operation signal of the hot air motor is raised by one step via the second setting value change unit according to the comparison result with the first set value change unit or the fifth temperature detection level. The operation signal of the refueling pump and the burner motor is further increased by one step through the first set value changing unit based on the comparison result with the third temperature detection level or the second set value changing unit based on the comparison result with the sixth temperature detection level. As the temperature decreases, the operation signal of the hot air motor is further increased by one step, and at the same time, the display unit notifies the user by lighting the lamp. 6. The combustion control device according to claim 5, wherein combustion is stopped based on a result of comparison with the seven temperature detection levels. 9. A vaporizing cylinder temperature detecting device detects a first temperature detecting level for controlling a normal vaporizing cylinder temperature, a second temperature detecting level for detecting that the temperature has further risen, and detecting that the temperature has further risen. A temperature setting unit that sets a third temperature detection level to perform and a fourth temperature detection level to detect a temperature at which the final combustion is stopped, and the hot air temperature detection device detects that the hot air temperature has risen above normal. A fifth temperature detection level;
Further, a temperature setting section is provided which sets a sixth temperature detection level for detecting that the temperature has risen and a seventh temperature detection level for detecting a temperature at which the final combustion is stopped, and a comparison result with the third temperature detection level or Based on the result of comparison with the sixth temperature detection level, the display unit informs the user by lighting the lamp, and based on the result of comparison with the fourth temperature detection level or the result of comparison with the seventh temperature detection level, stops combustion and displays temperature. 6. The combustion control device according to claim 5, wherein the display is made in such a manner that the cause of the combustion stoppage can be recognized using an indicator. 10. A vaporizing cylinder temperature detecting device detects a first temperature detecting level for controlling a normal vaporizing cylinder temperature, a second temperature detecting level for detecting that the temperature has further risen, and detecting that the temperature has further risen. A temperature setting unit that sets a third temperature detection level to perform and a fourth temperature detection level to detect a temperature at which the final combustion is stopped, and the hot air temperature detection device detects that the hot air temperature has risen above normal. A temperature setting section that sets a fifth temperature detection level, a sixth temperature detection level for detecting that the temperature has further risen, and a seventh temperature detection level for detecting a temperature at which the final combustion is stopped; The operation signal of the refueling pump and the burner motor is reduced by one step through the first set value changing unit or the second set value changing unit according to the result of comparison with the fifth temperature detection level according to the result of comparison with the detection level. The operation signal of the fuel pump is raised by one step, and the refueling pump is switched via the first set value changing unit based on the comparison result with the third temperature detection level or the second set value changing unit based on the comparison result with the sixth temperature detection level. And the operation signal of the burner motor is further lowered by one step, and the operation signal of the hot air motor is further raised by one step. If the operation signal set value at the time of change is the lower limit, combustion is stopped and only the hot air motor is changed The combustion control device according to claim 5, wherein the combustion control device is operated by a subsequent operation signal, and restarts the combustion operation when the vaporization cylinder temperature or the hot air temperature decreases to the second temperature detection level or the fifth temperature detection level. 11. A fuel supply pump for supplying fuel, a burner motor having a burner fan for supplying combustion air mounted on a rotating shaft, a vaporizing cylinder for vaporizing the fuel, and a vaporizing cylinder temperature for detecting a temperature of the vaporizing cylinder. A detection device, a combustion control unit for controlling a combustion amount and a sequence, a combustion amount setting unit for setting operation signals of the refueling pump and the burner motor by a signal from the combustion control unit, and a pump control for controlling the refueling pump. Unit, a burner motor control unit that controls the burner motor, a combustion cylinder that burns a mixed gas of vaporized fuel and air, and a heat exchanger for exchanging heat of the combustion gas,
A hot air fan attached to a hot air motor for sending air to the heat exchanger and blowing it out as a hot air into a room, a hot air amount setting unit for setting an air blowing amount of the hot air fan, and a hot air blowing outlet. A louver that controls the opening of the outlet according to the amount of combustion, an open / close detection device that detects the open / closed state of the louver, and an operation signal of an oil supply pump, a burner motor, and a hot air motor based on the output of the vaporization cylinder temperature detection device. A first set value changing unit for changing a set value, wherein the vaporizing cylinder temperature detecting device has a temperature setting unit for setting a plurality of temperature detection levels, and the first set value is determined based on a comparison result with the temperature detection level. The setting values of the operation signal of the oil pump and the burner motor of the combustion amount setting unit and the operation signal of the hot air motor of the combustion amount setting unit are changed via the changing unit, and the louver is forcibly opened and closed by the signal of the first setting value changing unit. , If there is no switching signal in conjunction with Les,
A combustion control device configured to stop combustion.