JPH08247456A - Combustion control device - Google Patents

Abstract

PURPOSE: To extend a combustion time after sensing a lack of oil and to enable a combustion termination caused by the lack of oil to be classified in a combustion control device applied in a petroleum hot air heater. CONSTITUTION: A control part 17 displays an oil leakage at a display part 19 when a signal of an oil amount sensing means 4 is less than a predetermined amount of residual oil within a tank 2 and the control part 17 is constructed such that a termination of combustion caused by an abnormal combustion signal at a combustion sensor 13 is applied as a combustion terminating display of a lack of fuel performed at the display part 19 after a predetermined time elapses from a displaying time. Combustion is continued until a pump 5 can not feed fuel after the fuel is completely consumed in the tank, so that the combustion time after displaying the lack of fuel is extended and a time duration until a fuel is supplied can be extended and a convenience in use performed by a user can be attained. Then, the termination of combustion caused by an abnormal combustion signal at the combustion sensor 3 produced by the fact that the pump 5 can not feed fuel any more is displayed as a combustion termination caused by the lack of fuel at the display part 19, so that an erroneous display may also be prevented.

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 used in a petroleum hot air heater or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a petroleum hot air heater of this type is a main body case, which is detachably attached to a tank 2 holding liquid fuel on its lower side and an upper portion of the tank 2. A cartridge tank 3 is provided, and an oil level detecting means 4 such as a float type for detecting the oil level of the fuel in the tank 2 and the fuel of the cartridge tank 3 based on the weight of the cartridge tank 3 Refueling detection means 4A for detecting the sky is provided.

Reference numeral 5 denotes a pump mounted on the upper surface of the tank 2 so that fuel is supplied from the upper end of the pump to the vaporizing section 7 which is kept at a predetermined temperature or higher by the heater 8 and the temperature detecting means 9 through the oil feed pipe 6. It has become.

Reference numeral 10 denotes a nozzle portion arranged at the tip of the vaporizing portion 7, which is a primary portion of the fuel gas vaporized by the vaporizing portion 7 and is provided with the ejector effect provided horizontally downstream of the vaporizing portion 7 to separate the primary air. It is ejected into the mixing tube 11 for suction.

Reference numeral 12 denotes a line-shaped burner unit integrated with the mixing pipe 11, which burns the mixed gas from the mixing pipe 11 and detects a combustion state of the burner unit 12 in the vicinity thereof.
Is provided.

Reference numeral 14 is a combustion cylinder for guiding the combustion gas from the burner portion 12 upward, and a blower 15 for taking in and delivering the indoor air flow is arranged at the back of the combustion cylinder. Reference numeral 16 denotes a duct that mixes the combustion gas from the combustion cylinder 14 and the indoor air flow from the blower 15 to generate warm air.

Further, as shown in FIG. 6, 17 is a pump 5,
A control unit for driving and controlling the heater 8, the blower 15, etc., is determined in advance based on the operating condition signal input from the operation unit 18, the output of the oil amount detection means 4 and the combustion sensor 13, the output of the temperature detection means 9 and the like. The display unit 19 controls the display unit 19 to display the operating conditions of the burner unit 12 and other states.

In the above structure, the vaporizing section 7 is kept at a temperature higher than a predetermined temperature by the heating control of the heater 8 by the temperature detecting means 9, and vaporizes the fuel supplied from the pump 5 through the oil supply pipe 6. The vaporized fuel gas is vaporized by the vaporization unit 7
The air is ejected from the nozzle portion 10 at the tip, the ambient air is sucked and mixed by the ejector effect generated, and this mixed gas is supplied into the burner portion 12 through the mixing pipe 11 and ejected from the flame hole portion to burn. To be done.

The generated combustion gas is guided upward by a combustion cylinder 14 arranged so as to cover the periphery of the burner portion 12, and is mixed with the indoor air flow from the blower 15 by a duct 16 covering the combustion cylinder 14. It is then discharged as warm air and used for heating. When the control unit 17 adjusts the fuel supply amount by changing the driving frequency and the applied voltage of the pump 5 based on the operation condition signal input from the operation unit 18 in the oil warm air heater, the primary air amount is also changed. As the amount of combustion increases and decreases, the amount of combustion can be changed while keeping the ratio of fuel and air constant.

When the fuel in the cartridge tank 3 is used less and the weight in the cartridge tank 3 becomes lighter, the controller 17 detects that the amount of oil in the cartridge tank 3 has decreased due to that weight. The means 4A detects and causes the display unit 19 to display the first oil shortage. Then, when the fuel is further used and the oil level in the tank 2 becomes low and the oil level in the tank 2 becomes low, the oil level detecting means 4 detects the oil level and causes the display section 19 to display a second oil shortage indication. The combustion of the burner unit 12 is stopped after a predetermined time has elapsed so that the combustion is stopped before the pump 5 cannot send the fuel because the fuel in the tank 2 is exhausted. Further, when the combustion of the burner unit 12 causes an abnormality for some reason, for example, when the combustion amount becomes extremely small, the control unit 17 detects the abnormality and stops the combustion. The display unit 19 is adapted to display a display according to the content of the combustion abnormality.

[0011]

However, in the petroleum hot air heater having such a structure, the fuel in the tank 2 is used less, the oil level in the tank 2 becomes lower, and the oil level height becomes lower. After the surface detection means 4 detects and the display section 19 displays the oil shortage, the fuel in the tank 2 is exhausted and the pump 5
The combustion of the burner section 12 is stopped after a predetermined time has elapsed so as to stop the combustion before the fuel can no longer be sent. However, there are variations in the oil level of the oil level detection means 4 and combustion of the burner section 12. There is a problem that the above-mentioned predetermined time becomes considerably short when the amount, that is, the variation in the fuel consumption amount is taken into consideration.

For this reason, when the oil out of the cartridge tank 3 is detected, the first oil out indication is displayed on the display section, and the combustion time is lengthened from the oil out indication, the new oil supply detection means 4A It becomes necessary, the structure becomes complicated, and the cost becomes high.

Further, in order to improve the usability by prolonging the combustion time after the oil level detecting means detects the oil shortage,
If the above-mentioned predetermined time is set too long, if the control unit 17 runs out of oil and the combustion in the burner unit 12 is stopped and the fuel in the tank 2 runs out and the pump 5 cannot send fuel,
The combustion in the burner unit 12 becomes extremely small on the way, and the combustion sensor 13 detects the above abnormality and stops the combustion to display the combustion abnormality on the display unit 19 in spite of the combustion stop due to running out of oil. There was also a problem. In this case, in particular, the combustion stop due to running out of oil is a normal stop, whereas the abnormal combustion stop indicates a malfunction of the equipment, which gives the user a feeling of anxiety and causes a normal combustion when abnormal combustion actually occurs. There was a concern that the user would continue to use the product without knowing it, thinking that it would stop burning due to running out of oil.

The present invention solves the above-mentioned problems and has a simple structure, which lengthens the combustion time after the oil level detection means 4 detects the oil shortage to improve the usability and stops the combustion of the oil shortage. The purpose is to ensure the safety by ensuring that the display section 19 displays the oil shortage.

[0015]

In order to achieve the above object, the present invention is, in the configuration of the first invention, a tank for storing a fuel, and an oil amount detecting means for detecting a residual oil amount of the fuel in the tank. And a pump that sucks and discharges fuel from the tank,
A burner section for burning the fuel supplied by the pump, a combustion sensor arranged near the burner section for detecting the combustion state of the burner section, and a combustion exhaust gas generated in the burner section covering the burner section upwards. A leading combustion cylinder, a duct that covers the combustion cylinder and mixes the combustion exhaust gas and the indoor air flow from the blower to generate warm air, and a control unit that controls the combustion conditions of the burner unit by controlling operating conditions such as the pump, And a display unit for displaying a state such as an operating condition of the burner unit based on a signal from the control unit, wherein the control unit is provided when the signal of the oil amount detection means is equal to or less than a predetermined amount of the residual oil amount in the tank. In addition to displaying the oil shortage, it is configured to display the combustion stop due to the abnormal combustion signal from the combustion sensor at the time point or after a predetermined time has passed after the detection as the fuel stop combustion stop indication on the display unit. And Aru.

In the structure of the second aspect of the invention, a tank for storing the fuel, a cartridge tank detachably arranged in the tank to replenish the fuel in the tank to a constant oil level,
A pump that sucks and discharges fuel from the tank, a burner portion that burns the fuel supplied by the pump, a combustion sensor that is disposed near the burner portion, and detects a combustion state of the burner portion, and the burner portion. A combustion tube that guides the combustion exhaust gas generated in the cover burner portion upward, a duct that covers the combustion cylinder and mixes the combustion exhaust gas with the indoor air flow from the blower to generate warm air, and controls the operating conditions such as the pump. A control unit for controlling combustion of the burner unit and a display unit for displaying a condition such as operating conditions of the burner unit on the basis of a signal from the control unit are provided to detect when the fuel in the cartridge tank is below a predetermined amount. With the refueling detection means to
The control unit displays an oil shortage when the refueling detection means outputs a signal indicating that the amount of fuel in the cartridge tank is less than or equal to a predetermined amount, and at that time, or after a predetermined time has elapsed after the detection, a combustion sensor is used. The combustion stop due to the abnormal combustion signal is displayed on the display unit to indicate that the fuel has run out.

[0017]

According to the first aspect of the present invention, as described above, the control unit displays the oil shortage when the signal from the oil amount detecting means is equal to or less than the predetermined amount of the residual oil amount in the tank, and from that time point. ,
Alternatively, after a lapse of a predetermined time after the detection, the stop of the fuel due to the abnormal combustion signal of the combustion sensor is displayed on the display unit as the stop of the fuel, so the fuel in the tank is exhausted. Since the pump can continue to burn until it can no longer deliver fuel, the combustion time after displaying the oil shortage can be extended, and the time until refueling can be extended, which improves the usability for the user. Further, since the combustion stop due to the abnormal combustion signal in the combustion sensor caused by the pump being unable to send the fuel is displayed on the display unit as the combustion stop indicating that the fuel has run out, erroneous display can be prevented and safety can be secured. Furthermore, the period during which the combustion stop due to the abnormal combustion signal of the combustion sensor is displayed as the combustion stop of running out of fuel can be shortened.

In the second configuration, the control unit displays the oil shortage when the fuel supply detection means outputs a signal indicating that the fuel in the cartridge tank is less than a predetermined amount, and at the same time or detects it. After a lapse of a predetermined time from the above, it is configured so that the combustion stop due to the abnormal combustion signal from the combustion sensor is displayed on the display unit as the combustion stop indication of running out of fuel. With such a configuration, the burning time after the depletion of oil is similarly displayed and the time until refueling can be lengthened, which improves the usability for the user. Also, because the combustion stop due to the abnormal combustion signal in the combustion sensor that occurs when the pump cannot deliver fuel is displayed as the combustion stop indication of running out of fuel on the display unit,
False display can be prevented and safety can be secured. Furthermore,
It is also possible to shorten the period in which the combustion stop due to the abnormal combustion signal of the combustion sensor is displayed as the combustion stop indicating that the fuel has run out.

Furthermore, since the oil shortage can be indicated by the oil shortage in the cartridge tank, the combustion time after the oil shortage indication can be further lengthened.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

In FIG. 1, reference numeral 20 denotes a refueling display control section provided in a part of a control section 17 for driving and controlling the pump 5, the heater 8, the blower 15, etc. When the oil level in the tank 2 becomes low due to being used and the oil level detection means 4 detects the oil level, when the oil level detection means 4 or the oil supply detection means 4A detects oil shortage, The refueling display control unit 20 drives and controls the pump 5, the heater 8, the blower 15 and the like in a predetermined sequence, and also controls the display unit to display.

The refueling detection control section 20 is constructed as shown in FIGS. 2, 3 and 4, and its construction will be described below together with its operation.

The invention shown in FIG. 2 will be described. Burner part 12
When the fuel in the tank 2 is consumed and the oil level in the tank 2 becomes low due to combustion, the oil level detection means 4 detects the oil level height, and the display section 19 indicates that the oil level is low. Let Then, when the fuel in the tank 2 is exhausted and the pump 5 cannot deliver the fuel, the combustion amount becomes extremely small and the combustion sensor 13 detects a combustion abnormality, the combustion is stopped at 22 and the refueling display control unit 20 at 23. Is configured so that the display section indicates that the fuel has run out of combustion.

According to the present invention, with the above-described structure, the fuel supply display control unit 20 displays the oil shortage when the signal from the oil level detection means 4 is less than the predetermined amount of the residual oil amount in the tank 2, and the combustion sensor 13 Since the combustion stop due to the abnormal combustion signal in (1) is displayed on the display unit 19 as the combustion stop indication of running out of fuel, the combustion is continued until the fuel in the tank 2 is exhausted and the pump 5 cannot deliver the fuel. Therefore, the burning time after displaying the oil shortage becomes longer, and the time until refueling can be made longer, which improves the usability for the user. Further, since the combustion stop due to the abnormal combustion signal in the combustion sensor 13 caused by the pump 5 being unable to send fuel is displayed on the display unit 19 as the combustion stop of running out of fuel, erroneous display can be prevented and safety can be secured. .

Next, according to the invention shown in FIG. 3, when the fuel in the tank 2 is consumed by the combustion of the burner section 12 and the oil level in the tank 2 becomes low, the oil level height is detected by the oil level detecting means. 4 detects, and at 24, the display section 19 is made to indicate that oil is running out. And from that point, after a predetermined time has passed,
Since the fuel in the tank 2 is exhausted and the pump 5 cannot deliver the fuel, the combustion amount becomes extremely small and the combustion sensor 13
When the abnormal combustion is detected, the combustion is stopped at 25, and the refueling display control unit 20 at 26 indicates that the fuel consumption is stopped by the display unit 19.

According to the present invention, due to the above-described configuration, the oil supply display control unit 20 indicates the oil shortage when the signal of the oil level detection means 4 is equal to or less than the predetermined amount of the residual oil amount in the tank 2 as in the first configuration. In addition, since the combustion stop due to the abnormal combustion signal from the combustion sensor 13 is displayed on the display unit 19 as the combustion stop indication of running out of fuel, the fuel in the tank 2 is exhausted and the pump 5 discharges fuel. Since the combustion can be continued until the oil cannot be delivered, the combustion time after the oil shortage is displayed becomes longer, and the time until refueling can be made longer, which improves the usability for the user.

Further, since the combustion stop due to the abnormal combustion signal in the combustion sensor 13 caused by the pump 5 being unable to send the fuel is displayed on the display unit 19 as the combustion stop due to running out of fuel, an erroneous display can be prevented and the safety can be improved. Can be secured. Tank 2
Since the fuel is kept running until the pump 5 cannot send the fuel, the combustion time after the oil shortage is displayed becomes longer, and the time until refueling can be made longer, which improves the usability of the user.

Further, since the combustion stop due to the abnormal combustion signal in the combustion sensor 13 caused by the inability of the pump 5 to send the fuel is displayed on the display unit 19 as the combustion stop of running out of fuel, an erroneous display can be prevented and the safety can be improved. Can be secured.

Furthermore, since the period during which the combustion stop due to the abnormal combustion signal of the combustion sensor 13 is indicated as the combustion stop of running out of fuel can be shortened, the safety can be further improved.

Next, the invention shown in FIG. 4 is provided with refueling detection means 4A for detecting when the fuel in the cartridge tank 3 is below a predetermined amount, and in the control section 17, the refueling detection means detects the fuel in the cartridge tank 3. When the signal below the fixed amount is output, the oil shortage is displayed at 27, and after a lapse of a predetermined time from that point, the fuel in the tank 2 is exhausted and the pump 5 cannot deliver the fuel. When the combustion sensor 13 detects an extremely low combustion abnormality, the combustion is stopped at 28, and the refueling display control unit 20 at 29 indicates that the fuel is out of combustion at the display unit 19. .

According to the present invention, with the above configuration, the refueling display control unit 20 displays the oil shortage when the signal from the refueling detection means 4A is less than or equal to the predetermined amount of the remaining oil amount in the cartridge tank 3, and from that time point. Since the combustion stop due to the abnormal combustion signal from the combustion sensor 13 after the lapse of a predetermined time is displayed on the display unit 19 as the combustion stop indication of running out of fuel, the fuel in the tank 2 is exhausted and the pump 5 is stopped. Since the combustion can be continued until the fuel cannot be sent, the combustion time after displaying the oil shortage can be extended, and the time until refueling can be extended, which improves the usability for the user. Also,
The display unit 19 displays the combustion stop due to an abnormal combustion signal in the combustion sensor 13 caused by the pump 5 being unable to send fuel.
Since the combustion stop display for running out of fuel is displayed, it is possible to prevent erroneous display and ensure safety.

In the above embodiment, the oil level detection means 4 using a float or the like for detecting the oil level in the tank 2 is used instead of the oil level detection of the fuel in the tank 2; Any other structure may be used as long as it can detect the above.

[0033]

As described above, the combustion control device of the present invention displays the oil shortage when the signal from the oil amount detecting means is equal to or less than the predetermined amount of the residual oil amount in the tank, and from that time point, Or after a predetermined time has passed since the detection,
Combustion stop due to the abnormal combustion signal from the combustion sensor is configured to indicate that the fuel is running out of fuel on the display, and the combustion time is extended after the oil level detection means detects oil depletion for better usability. At the same time, it is possible to ensure the safety by displaying the oil out indication on the display unit when the combustion is stopped.

[Brief description of drawings]

FIG. 1 is a block diagram of a combustion control device according to an embodiment of the present invention.

FIG. 2 is a flowchart of the control device.

FIG. 3 is a flowchart of a control device according to the other invention.

FIG. 4 is a flowchart of a control device according to the other invention.

FIG. 5 is a cross-sectional view of an oil warm air heater using the present invention and a conventional combustion control device.

FIG. 6 is a block diagram showing a conventional combustion control device.

[Explanation of symbols]

 2 tank 3 cartridge tank 4 oil level detection means 4A oil supply detection means 5 pump 12 burner section 13 combustion sensor 14 combustion tube 15 blower 16 duct 17 control section 18 operation section 19 display section 20 oil supply display control section

Claims (2)

[Claims] 1. A tank for storing fuel, an oil amount detecting means for detecting the amount of residual oil in the fuel in the tank, a pump for sucking and discharging the fuel from the tank, and a fuel supplied by the pump. A burner section, a combustion sensor disposed near the burner section to detect the combustion state of the burner section, a combustion tube that covers the burner section and guides combustion exhaust gas generated in the burner section upward, and a combustion tube that covers the combustion tube A duct that mixes the combustion exhaust gas and the indoor air flow from the blower to generate warm air,
The control unit includes a control unit that controls operating conditions of the pump or the like to control combustion in the burner unit, and a display unit that displays a state of operating conditions of the burner unit based on a signal from the control unit. Indicates when the signal from the oil amount detection means is less than or equal to a predetermined amount of the residual oil amount in the tank, and
A combustion control device for displaying a combustion stop due to an abnormal combustion signal from a combustion sensor as a fuel stop indication on a display unit after a predetermined time has elapsed from that point or after detection. 2. A tank for storing fuel, a cartridge tank removably disposed in the tank for replenishing the fuel in the tank to a constant oil level, a pump for sucking and discharging the fuel from the tank, and a pump by the pump. A burner section for burning the supplied fuel, a combustion sensor arranged near the burner section for detecting the combustion state of the burner section, and a combustion tube for covering the burner section and guiding combustion exhaust gas generated in the burner section upward A duct that covers the combustion cylinder and mixes the combustion exhaust gas with the indoor air flow from the blower to generate hot air, and a control unit that controls the combustion conditions of the burner unit by controlling operating conditions such as the pump,
A controller for displaying a condition such as an operating condition of the burner unit based on a signal from the controller, and a refueling detector for detecting when the fuel in the cartridge tank is below a predetermined amount, and the controller. Indicates that oil has run out when the fuel supply detection means outputs a signal indicating that the amount of fuel in the cartridge tank is less than or equal to a predetermined amount, and at that point or after a predetermined time has elapsed after detection, abnormal combustion in the combustion sensor Combustion control device that displays the combustion stop due to the signal of the above as a fuel stop combustion stop display on the display unit.