JPH0445354A - Heating apparatus - Google Patents

Abstract

PURPOSE:To carry out an isolated air cleaning operation without giving a warning of the liquid fuel running short, even if the amount of the fuel is not above a predetermined value, and thus make its operation easier by a method wherein, when the isolated air cleaning operation mode is selected by a switching means, no operation for error correction is made by a fuel exhaustion error correcting means. CONSTITUTION:When a heating operation mode is selected, a combustion part 2 and an air supply mechanism 9 are actuated, whereby the air supplied into the combustion part by the air supply mechanism is heated and released as hot air for heating. At this time, when the amount of liquid fuel is decreased to a value not more than predetermined, an error correcting means is actuated to stop the heating operation or indicate the exhaustion of the fuel. When an air cleaning operation mode alone is selected, an air cleaning part 10 and the air supply mechanism are actuated, whereby the dusts or the like drawn in from the air by the air supply mechanism are removed through the air cleaning part and carried out as purified air. In this case, even if the amount of liquid fuel is not above the predetermined value, the error correcting means is not actuated and, consequently, there is neither termination of the air cleaning operation nor indication of the exhaustion of the fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heating device that uses liquid fuel and is equipped with an air cleaning section.

(Prior Art) A kerosene fan heater is known as a conventional heating device of this type. The above kerosene fan heater is generally
A combustion part that burns kerosene, a blower mechanism that sends the air taken in from the outside through the combustion part, an air purifying part that uses high pressure to adsorb dust, etc. in the air that is taken in from the outside, and detects the amount of kerosene. A control circuit section that performs error processing such as stopping operation or displaying fuel exhaustion when the amount of kerosene detected by the oil amount detection section is below a predetermined value, and a heating operation mode.

It is equipped with a changeover switch to switch between the air purification single operation mode and the heating and air purification mixed operation mode. Then, when the heating operation mode is selected, the combustion section and the blowing mechanism are operated, when the air purifying single operation mode is selected, the air purifying section and the blowing mechanism are operated, and when the mixing mode is selected, the combustion section, the air purifying section, and the blowing mechanism are operated. It's working. In addition, the oil level detection section and control circuit section are functional no matter what operating mode is in operation, and if the amount of kerosene falls below a predetermined value, the current operation is stopped and an oil-out indication is displayed. The system was designed to warn users of this issue. Therefore, even during air purification independent operation that does not require kerosene, when the kerosene runs out, the operation is stopped or an oil-out indication is displayed.

(Problems to be Solved by the Invention) As described above, in the past, when the kerosene was out, it was impossible to perform an air purifying standalone operation that did not require kerosene, making it inconvenient to use. In addition, an indication that oil is out may be displayed during air purification alone, which may confuse the user.Therefore, an improvement has been desired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heating device that can perform air purifying operation alone without being notified of liquid fuel exhaustion even if the amount of liquid fuel is less than a predetermined amount, thereby improving usability.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a combustion section that burns liquid fuel, a blower mechanism that sends atmospheric air taken in from the outside to the outside through the combustion section,
This air purifying unit uses high pressure to adsorb dust, etc. in the atmosphere taken in from the outside by this ventilation mechanism, all detection means detects the amount of liquid fuel, and the amount of liquid fuel detected by this all detection means is below a predetermined value. a fuel-out error processing means that performs error processing such as stopping operation or displaying a fuel-out condition; a heating operation mode that operates the combustion section and the blower mechanism; and an air purifying standalone operation mode that operates the air purifying section and the blower mechanism. In the heating device having a switching means for switching, when the air purifying independent operation mode is selected by the switching means, the error processing by the fuel-out error processing means is not performed.

(Function) By taking such measures, the combustion section and the ventilation mechanism are operated when the heating operation mode is selected. As a result, the atmosphere sent into the combustion section by the blower mechanism is warmed and blown out as warm air to perform heating. In this case, when the amount of liquid fuel becomes less than a predetermined value, the error processing means is activated to stop the heating operation or display an indication that the fuel is out.

On the other hand, when the air cleaning independent operation mode is selected, the air cleaning section and the blowing mechanism are operated. As a result, dust and the like in the atmosphere taken in by the air blowing mechanism are removed by the air cleaning section, cleaned, and discharged. In this case, even if the amount of liquid fuel is less than a predetermined value, the error processing means will not operate, and the air purifying independent operation will not be stopped or a display indicating that the fuel is out of fuel will not be displayed.

(Example) Hereinafter, an example in which the present invention is applied to a kerosene fan heater will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing the structure of a kerosene fan heater. In the figure, 1 is a burner, and 2 is a combustion chamber facing the flame port of the burner 1. The burner 1 and the combustion chamber 2 constitute a combustion section that burns kerosene as liquid fuel. 3 is the exterior, and the front of the exterior 3 has multiple blowing blades 4.
A warm air outlet 5 is provided, and an air intake port 6 is provided on the back side. 7 is a convection fan motor screwed onto a support fitting 8 having a shape that allows ventilation and is provided in the air intake port 6; 9 is a ventilation fan rotated by this fan motor 7; It constitutes an air blowing mechanism that sends the air taken in from the outside by the fan 9 to the outside through the combustion section. 1
0 is a dust collection unit provided on the air suction side of the fan motor 7, and 11 is a high voltage power supply device that converts AC power into DC power and applies a DC voltage of several kV between each electrode of the dust collection unit 10. The dust collecting unit 10 and the high-voltage power supply 11 constitute an air purifying section that uses high pressure to adsorb dust and the like from the atmosphere taken in from the outside by the blowing mechanism.

FIG. 2 is a block diagram showing the control circuit of the kerosene fan heater. As shown in the figure, a vaporizer heater 23 for heating the vaporizer is connected to a commercial AC power source 21 via a bidirectional three-terminal thyristor 22 . A photothyristor 24 of a photocoupler 24 is connected between the gate and terminal of the thyristor 22 via a resistor 25.

In addition, a normally open contact 26m of the first relay 26 is connected to the power source 21.
The AC input terminal of the diode bridge circuit 28 is connected via the normally open contact 27m of the second relay 27 in series. A solenoid valve 29 for controlling the opening and closing of the vaporized gas supply path to the burner 1 is connected to the rectified output terminal of the diode bridge circuit 28. A resistor 30 is connected in parallel to the normally open contact 27m of the second relay 27.

In addition, a normally open contact 26m of the first relay 26 is connected to the power source 21.
A capacitor 31 is connected through the capacitor 3.
1 and an ignition heater 33 is connected in parallel with the normally closed side of the switching contact 32t of the third relay 32 in series.

Further, the convection fan motor 7 is connected to the power source 21 via the normally open side of the switching contact 32t of the third relay 32.

Furthermore, a control circuit section 34 having a built-in microcomputer and the like is connected to the power source 21.

The control circuit section 34 includes an operation switch 35, a changeover switch 36 as a switching means for selectively switching each operation mode of a heating operation mode, a mixed mode of heating operation and air purification operation, and an air purification single operation mode; Three relays 32 are connected to each other. Further, the control circuit section 34 includes a switch 37 that is interlocked with the operation switch 35.
Through the first. The second relay 26, 27 and the light emitting diode 142 of the photocoupler 14 are connected. Further, the control circuit section 34 includes a vaporizer thermistor 38 for detecting the vaporizer temperature, a room temperature thermistor 39 for detecting the room temperature, an electromagnetic pump 40 for supplying kerosene from the kerosene tank side to the vaporizer, and a sensor for detecting the flame of the burner 1. A frame rod 41, an oil detector 42 as an amount detection means for detecting the amount of kerosene in the kerosene tank, and an indicator 4 for indicating oil shortage, etc.
3 and the high-voltage power supply device 11 are connected to each other.

Thus, the circuit control section 34 is set to perform the operation control shown in FIG. 3. That is, when the operation switch 35 is turned on and the power is turned on, each relay 26.
After performing initialization processing such as initialization of 27.32 and self-diagnosis of the display 43, the signal of the changeover switch 36 is read. As a result, when the heating operation mode or the mixed operation mode is selected, the output signal of the oil detector 42 is captured,
Check the amount of kerosene in the kerosene tank. Here, if the amount of kerosene is less than the predetermined value of approximately 0° and oil shortage is detected, the current operation is immediately stopped and the indicator 4
3 indicates that the oil is out (error handling means).

On the other hand, when the amount of kerosene is greater than the predetermined value, heating operation is possible, so the operation mode selected by the changeover switch 36, that is, the normal operation of the heating operation mode or the mixed operation mode, is controlled.

That is, first, the light emitting diode 24 of the photocoupler 24
Operate □ to emit light. In this state, the carburetor thermistor 38
Check the detected temperature. When this detected temperature reaches a predetermined temperature, the first. Turn on the second relays 26 and 27. Also, the electromagnetic pump 40 is operated. The second relay 27 is turned off after a certain period of time. Furthermore, when the flame of the burner is detected by the flame rod 41 after a predetermined period of time has elapsed, the third relay 32 is turned on. At this time, in the case of mixed operation mode, the high voltage power supply device 11 is turned on.

Note that if flame cannot be detected within a predetermined time by the flame rod 41, the third relay 32 is forcibly turned on or the operation is stopped.

Thereafter, when the operation switch 35 is turned off, the light emitting diode 24□ is turned off and the first relay 26 is turned off. Further, the third relay 32 is turned off after a certain period of time. At this time, in the case of mixed operation mode, the high voltage power supply device 11 is also turned off.

On the other hand, when the air purifying independent operation mode is selected by the changeover switch 36, the process of checking the amount of kerosene in the kerosene tank by taking in the output signal of the oil detector 42 is not performed, and the air purifying independent operation mode is immediately performed. Controls the normal operation mode. That is, the third relay 32 is turned on and the high voltage power supply device 11 is turned on. Thereafter, when the operation switch 35 is turned off, the third relay 32 is turned off and the high voltage power supply device 11 is also turned off.

In this embodiment with such a configuration, the changeover switch 3
When the operation switch 35 is turned on with the heating operation mode or the mixed operation mode selected in step 6, the amount of kerosene in the kerosene tank detected by the oil detector 42 is first checked.

Here, if the amount of kerosene is less than the predetermined amount at approximately 0°,
When the operation is stopped, an oil out message is displayed on the display 43 to notify the user that there is no kerosene.

On the other hand, if the amount of kerosene in the kerosene tank is greater than the predetermined amount, heating operation or a mixed operation of heating operation and air purification operation is performed depending on the changeover switch 36. That is, first, the light emitting diode 24□ of the photocoupler 24 emits light. As a result, the photothyristor 2 of the photocoupler 24
42 is activated and the thyristor 22 is triggered. In this way, the thyristor 22 is brought into conduction and electricity starts to be supplied to the vaporizer heater 23, so that the vaporizer is heated. here,
The temperature of the vaporizer is detected by a vaporizer thermistor 38. Then, when the vaporizer temperature reaches a predetermined temperature, the first relay 26 and the second relay 27 are turned on. As a result, the normally open contacts 26m and 27m of each relay are closed,
A high voltage is applied to the solenoid valve 29 and the ignition transformer 33. Then, after a certain period of time, the second relay 27 is turned off and its normally open contact 27m is opened. This results in
The voltage applied to the solenoid valve 29 is reduced by the partial pressure between the solenoid valve 29 and the resistor 30. In this way, after the electromagnetic valve 29 is attracted by a high voltage applied at the beginning of the combustion operation, the attracting state is maintained at a low voltage suppressed by the resistor 30.

Furthermore, when the vaporizer temperature reaches a predetermined temperature, the electromagnetic pump 40 is operated. Thereby, kerosene is supplied from the tank to the vaporizer and vaporized. Then, when the solenoid valve 29 is attracted and the vaporized gas supply path is opened, the vaporized gas is supplied to the burner 1 through the supply path. In this way, the burner 1 is ignited by the ignition lance 33 to which a high voltage has been applied, and the combustion operation is started.

When the flame of the burner 1 is detected by the flame rod 41 after a certain period of time after the start of combustion operation, the third relay 32 is turned on and the normally closed side of the switching contact 32t is opened. The sides are closed. As a result, energization to the ignition transformer 33 is stopped, and instead, energization to the blower fan motor 7 is started.

In this way, the blower fan 9 rotates, and the air sent into the interior from the air intake port 6 becomes hot air in the combustion chamber 2 and is discharged to the outside from the hot air outlet 5.

Further, in the case of the mixed operation mode, when the flame of the burner 1 is detected by the flame rod 41 and the third relay 32 is turned on, the high voltage power supply device 11 is also turned on. As a result, a DC voltage of several kV is applied between each electrode of the dust collection unit 10. In this way, dust and the like in the air that is sent into the interior from the air intake port 6 by the ventilation fan 9 is adsorbed and removed by the dust collecting unit 10, and an air purifying operation is performed.

Thereafter, when the operation switch 35 is turned off, the switch 37 is also turned off at the same time. This causes light emitting diode 2
42 is extinguished, the first relay 26 is turned off, and the normally open contact 26m of the first relay 26 is opened.
As the vaporizer heater 23 is no longer energized,
The electromagnetic valve 29 is also no longer energized. After a certain period of time, the third relay 32 is turned off, the normally closed side of the switching contact 32t is closed, and the normally open side is opened. As a result, the supply of electricity to the blower fan motor 7 is stopped, the blower fan 9 is stopped, and the combustion operation is completed. Further, in the case of the mixed operation mode, the high voltage power supply bag 'M11 is also turned off, and the air cleaning operation is also completed.

On the other hand, when the operation switch 35 is turned on with the air purifying solo operation mode selected by the changeover switch 36,
The amount of kerosene in the kerosene tank is not checked based on the detection output of the oil detector 42, and the third relay 32 is turned on to open the normally closed side of the switching contact 32t and close the normally open side.

As a result, the supply of electricity to the blower fan motor 7 is started, and the blower fan 9 rotates. Furthermore, the high-voltage power supply 11 is also turned on, and a DC voltage of several kV is applied between each electrode of the dust collection unit 10. In this way, dust and the like in the air taken in from the air intake port 6 by the ventilation fan 9 is adsorbed and removed by the dust collecting unit 10, and an air purifying operation is performed.

Thereafter, when the operation switch 35 is turned off, the third relay 32 is turned off, the normally closed side of the switching contact 32t is closed, and the normally open side is opened.

As a result, the supply of electricity to the blower fan motor 7 is stopped, and the blower fan 9 is stopped. Furthermore, the high voltage power supply device 11 is also turned off, and the air cleaning operation is completed.

As described above, according to this embodiment, when the air purifying operation is performed alone, the amount of kerosene in the kerosene tank is not checked based on the detection output of the oil detector 42, so that there is no kerosene in the kerosene tank. It is also possible to perform air purification operation. Moreover, at this time, the user is not confused because the oil-out display, which is completely meaningless to the user, is not displayed, and the user-friendliness can be improved.

Note that the present invention is not limited to kerosene fan heaters, but can be applied to any heating device that uses liquid fuel and is equipped with an air purifier.

[Effects of the Invention] As described in detail above, according to the present invention, even if the liquid fuel is less than a predetermined amount, the air purifying operation can be carried out without any notification regarding the liquid fuel being exhausted, thereby improving the usability of the heater. equipment can be provided.

[Brief explanation of the drawing]

The figures are diagrams showing an embodiment in which the present invention is applied to a kerosene fan heater, in which FIG. 1 is a longitudinal sectional view showing the structure of the kerosene fan heater, and FIG. 2 is a circuit configuration diagram of the kerosene fan heater. , FIG. 3 is a flowchart showing the main processing of the control circuit section. DESCRIPTION OF SYMBOLS 1...Burner, 2...Combustion chamber, 5...Hot air outlet, 6...Air intake port, 7...Convection fan motor, 9...Blower fan, 10... - Dust collection unit, 11... High voltage power supply device, 25... Control circuit section, 3
5... Operation switch, 36... Changeover switch, 42
...Oil detector, 43...Indicator.

Claims (1)

[Scope of Claims] A combustion part that burns liquid fuel, a blower mechanism that sends air taken in from the outside to the outside through the combustion part, and an air cleaner that uses high pressure to adsorb dust and other particles in the air taken in from the outside. part, an amount detection means for detecting the amount of the liquid fuel; a fuel outage for performing error processing such as stopping operation or displaying an indication that the fuel is out when the amount of liquid fuel detected by the amount detection means is less than a predetermined value; In the heating device, the heating device has an error processing means, a switching means for switching between a heating operation mode in which the combustion section and the blower mechanism are operated, and an air purification independent operation mode in which the air purification section and the blower mechanism are operated, A heating device characterized in that when an operation mode is selected, error processing is not performed by the fuel-out error processing means.