JPH05264030A - Gasification type combustion device - Google Patents

Abstract

PURPOSE:To reduce a consumption power while shortening a time ranging from a turning-on of a power supply to an ignition. CONSTITUTION:There are provided a gasification device temperature sensor 47 for use in detecting a temperature of the gasification device and an indoor temperature sensor 47 for sensing an indoor temperature. A micro-computer 25 determines a retention temperature at a stopping time of combustion at the gasification device in response to the detected indoor temperature sensed by the indoor temperature sensor 47, it may further control an electrical energization of a heater and further control the gasification device for its pre- heating operation in the case that the retention temperature is lower than the retention temperature having the temperature of the gasification device detected by the gasification temperature sensor 48 during stopping of the combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporization type combustion apparatus having a vaporizer for vaporizing kerosene.

[0002]

2. Description of the Related Art A vaporization type combustion device starts energizing a heater to heat a vaporizer when the power is turned on, and when the vaporizer temperature reaches a preset preheating completion temperature or more, a kerosene from a storage tank is heated. Is supplied to the carburetor, the igniter is operated, the vaporized gas is ignited in the burner section, and the combustion operation is started.

In this vaporization type combustion apparatus, when the power is turned on while the vaporizer is cold, it takes time for the vaporizer temperature to reach the preheating completion temperature. Therefore, conventionally, even when the combustion is stopped, energization control to the carburetor heater is performed to keep the carburetor temperature at a temperature slightly lower than the preheating completion temperature,
The time from turning on the power to ignition was shortened.

[0004]

However, in the conventional vaporization type combustion apparatus of this type, in order to shorten the time from turning on the power to igniting, energization control to the carburetor heater is performed even when combustion is stopped. There was a problem of high power consumption. Therefore, the present invention is intended to provide a vaporization type combustion device that can reduce the power consumption while shortening the time from power-on to ignition.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a vaporization type combustion apparatus in which a vaporizer heated by a heater is provided, and kerosene supplied by the vaporizer is vaporized to perform a combustion operation.
Vaporizer temperature detection unit that detects the temperature of the carburetor, room temperature detection unit that detects the room temperature, and heat retention temperature determination that determines the heat retention temperature when the carburetor stops combustion according to the room temperature detected by this room temperature detection unit And a carburetor preheating means for preheating the carburetor by energizing the heater when the carburetor temperature detected by the carburetor temperature detection unit is lower than the heat retention temperature determined by the deciding means during combustion stop. Be prepared.

[0006]

According to the present invention having such a configuration, the heat retention temperature of the carburetor during combustion stop varies with room temperature. Therefore, when the room temperature is low, the time from power-on to ignition can be shortened by raising the heat retention temperature of the vaporizer.

On the other hand, when the room temperature is high, the power consumption of the heater for heating the vaporizer can be reduced by lowering the heat retention temperature of the vaporizer. Combustion operation is less likely to occur when the room temperature is high, and the user does not feel discomfort even if it takes some time from power-on to ignition. There is no problem even if it is lowered.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a warm air heater.

FIG. 1 shows the circuit configuration of the main body of the warm air heater. One of the terminals of the power plug 1 is connected to the power line 3A via the current fuse 2, and the other of the terminals is connected to the carburetor temperature fuse 4. Is connected to the power supply line 3B via.

A primary winding of a power transformer 5, a capacitor 6, and a TNR element 7 are connected between the power lines 3A and 3B. A convection motor 7 is connected between the power supply lines 3A and 3B via a normally open contact 33a of a first relay 33, which will be described later, and a two-contact switching contact 34a of a second relay 34, which will be described later, and will be described later. The combustion motor 8 is connected through the normally open contact 35a of the third relay 35.

The convection motor 7 drives a convection fan to circulate the air in the room through a heating chamber which is shielded from the combustion chamber. The combustion motor 8 drives a combustion fan to forcibly take in outdoor air into the combustion chamber and forcibly exhaust it.

The switching contact 34a of the second relay 34 is
The convection motor 7 is connected to the strong rotation terminal and the weak rotation terminal, respectively. Normally open contact 3 of the first relay 33
A series circuit of a capacitor 10 and a resistor 11 is connected in parallel to 3a, and a normally open contact 35a of the third relay 35 is also provided.
A series circuit of a capacitor 12 and a resistor 13 is connected in parallel with.

A series circuit of a carburetor heater 14 and a bidirectional three-terminal thyristor 15 is connected between the power supply lines 3A and 3B. A series circuit of a resistor 16 and a capacitor 17 is connected in parallel between the terminals of the thyristor 15, and a series circuit of the resistor 18 and a light receiving element 19a of the photocoupler 19 is connected between the gate and the terminal.

Further, between the power supply lines 3A and 3B, a series circuit of a normally open contact 37a of the fifth relay 37 and the diode bridge circuit 20, and a capacitor 21 are provided via a normally open contact 36a of a fourth relay 36 which will be described later. In addition, a series circuit of the ignition transformer 22 and the normally open contact 38a of the sixth relay 38 is connected.

The diode bridge circuit 20 connects the connection point between the cathode and the anode of the two diodes on one side to the normally open contact 37a of the fifth relay 37, and the cathode and anode of the two diodes on the other side. Is connected to the power supply line 3B.

A resistor 23 is connected in parallel to the normally open contact 37a of the fifth relay 37. A solenoid valve 24 for controlling the oil supply to the carburetor of kerosene is connected between the connection point between the anodes and the connection point between the cathodes of the two diodes of the diode bridge circuit 20. FIG. 2 shows the circuit configuration of the control unit that controls the circuit of the main body of the warm air heater, and the microcomputer 25 that constitutes the main unit of the control unit has a memory M built therein.

Inverters 26 and 2 are provided between the output terminals of the microcomputer 25 and the VB terminal, respectively.
The first relay 33, the second relay 34, the third relay 35, the fourth relay 36, the fifth relay 37, the sixth relay 38 and the resistor 39 via 7, 28, 29, 30, 31, 32.
And a series circuit of the light emitting element 19b of the photo coupler 19 are connected.

A diode 4 is provided in each of the relays 33 to 38.
0, 41, 42, 43, 44, 45 are connected in parallel,
Further, the resistor 39 and the light emitting element 19b of the photo coupler 19
A resistor 46 is connected in parallel to the series circuit of and.

A of the microcomputer 25
A room temperature detector 47 for detecting the room temperature and a carburetor temperature detector 48 for detecting the temperature of the carburetor are connected to the input terminal with the / D (analog / digital) conversion function. Further, the input terminal of the microcomputer 25 is connected to the output terminal of the room temperature setting unit 49 for setting the room temperature.

Further, a resistor 50 and an operation switch 51 are provided between the input terminal of the microcomputer 25 and Vss.
And a series circuit with is connected. The connection point between the resistor 50 and the operation switch 51 is grounded via the resistor 52. Further, the microcomputer 25 is adapted to output display data to the display 53.

FIG. 3 is a flow chart showing the main part control by the microcomputer 25. In this control, first in step ST1, it is checked whether or not the operation switch 51 is turned on. When the operation switch 51 is turned on, it is checked in ST2 whether the in-combustion flag F is set to "1". This burning flag F is reset to "0" in the initial state.

When the in-combustion flag F is reset, preheating control of the carburetor is performed in ST3. This control is
By controlling the light emitting element 19b of the photocoupler 19, the thyristor 15 is turned on and the heater 14 is energized.

Then, in ST4, the carburetor temperature CT detected by the carburetor temperature detecting unit 48 is read, and in ST5, it is determined whether the carburetor temperature CT is equal to or higher than the preset preheating completion temperature. When the carburetor temperature CT has not reached the preheating completion temperature, the process returns to ST1 and the operation switch 5
When it is confirmed that 1 is turned on and the in-combustion flag F is reset, the preheating control of the carburetor is continued.

Then, in ST4, the vaporizer temperature detection unit 48
If the carburetor temperature CT detected at is read and it is confirmed at ST5 that the carburetor temperature CT has reached the preheating completion temperature or higher, the combustion flag F is set to "1" at ST6 and ST7 is set. Ignition control is performed with.

In this control, first, the third relay 35 is turned on. Then, the normally-open contact 35 is closed, the combustion motor 9 starts to operate, and the pre-purge is performed. Therefore, after a predetermined time has passed, the fourth relay 36 and the fifth relay 37.
Turn on. Further, the sixth relay 38 is turned on for a fixed time. Then, the normally open contacts 36a, 37a, 38a are sequentially closed, the electromagnetic valve 24 is opened, kerosene is supplied to the carburetor, and the ignition transformer 22 operates for a certain time. As a result, the kerosene gas vaporized by the vaporizer is ignited by the ignition transformer 22 in the burner section, and the combustion operation is started.

Thus, if the combustion operation is started,
In ST8, combustion operation control is performed. In this control, first, the first relay 33 is turned on when a certain time has elapsed since the combustion operation was started. Then, the normally open contact 33a is closed to start the operation of the convection motor 7, and warm air is blown into the room to warm the room.

Thereafter, the room temperature RT detected by the room temperature detecting unit 47 and the set room temperature set by the temperature setting unit 49 are compared at any time. If the room temperature RT exceeds the set room temperature by a predetermined temperature, the fourth relay 36 and the fifth relay 37.
Is turned off to stop the combustion operation.

When the room temperature RT falls below the set room temperature by a predetermined temperature, the fourth relay 36 and the fifth relay 37 are turned on, and the sixth relay 38 is turned on for a certain period of time to restart the combustion operation. After that, the stop and restart of the combustion operation are repeated until it is confirmed in ST1 that the operation switch 51 is off.

When it is confirmed that the operation switch 51 is off in ST1, it is checked in ST9 whether the burning flag F is set to "1". And if set,
While resetting to "0" in ST10, fire extinguishing control is performed in ST11. This control sequentially turns off the fourth relay 36, the fifth relay 37, the first relay 33, and the third relay 35.

Next, at ST12, the room temperature RT detected by the room temperature detecting section 47 is read. Then, at ST13, the room temperature R
It is determined whether T is lower than a preset first set temperature T1. Here, the room temperature RT is the first set temperature T
If it is lower than 1, the first vaporizer heat retention temperature TH1 preset in ST14 is stored in the memory M incorporated in the microcomputer, and the process proceeds to ST18.

When the room temperature RT is higher than the first set temperature T1, it is determined in ST15 whether the room temperature RT is lower than a preset second set temperature T2 (T2> T1). Here, when the room temperature RT is lower than the second set temperature T2, the second vaporizer keeping temperature TH2 (TH2 <TH1) preset in ST16 is stored in the memory M, and the process proceeds to ST18. ..

When the room temperature RT is higher than the second set temperature T2, the third vaporizer keeping temperature TH3 (TH3 <TH2 <TH1) preset in ST17 is stored in the memory M, Go to ST18. The first and second set temperatures T1 and T2 (T1 <T2) are both set to values lower than the preheating completion temperature of the carburetor.

At ST18, the carburetor temperature CT detected by the carburetor temperature detecting section 48 is read. Then, in ST19, the carburetor temperature CT is compared with the carburetor heat retention temperature THx (x: 1, 2or3) stored in the memory M.

If the carburetor temperature CT is equal to or higher than the carburetor heat retention temperature THx, the photocoupler 1 is operated in ST20.
By controlling the light emitting element 19b of No. 9, the thyristor 15 is made non-conductive and the heater 14 is turned off.

On the other hand, when the carburetor temperature CT is lower than the carburetor heat retention temperature THx, the light emitting element 19b of the photocoupler 19 is controlled in ST21 to make the thyristor 15 conductive and turn on the heater 14. ..

After that, the processes of ST12 to ST21 are repeatedly executed until the operation switch 51 is turned on in ST1. That is, the room temperature RT is detected, the heat retention temperature THx of the vaporizer corresponding to the room temperature is obtained and stored in the memory M, the vaporizer temperature CT is detected, and the vaporizer temperature C is detected.
When T is equal to or higher than the heat retention temperature THx stored in the memory M, the heater 14 is turned off, and when it is lower than the heat retention temperature THx, the heater 14 is turned on.

As described above, in this embodiment, when the operation switch 51 is turned off and the combustion operation is not performed, the carburetor heater 14 is turned on and off so that the carburetor maintains a predetermined carburetor warming temperature. Is kept warm by.

Here, the vaporizer heat retention temperature changes depending on the room temperature RT detected by the room temperature detection unit 47.
That is, when the room temperature RT is lower than the first set temperature T1, the carburetor heat retention temperature becomes TH1, and when the room temperature RT is equal to or higher than the first set temperature T1 but lower than the second set temperature T2, the carburetor heat retention temperature is TH2. When the temperature is equal to or higher than the second set temperature, the carburetor heat retention temperature becomes TH2.

Here, the vaporizer heat retention temperatures TH1, TH2,
All TH3 are lower than the preheating completion temperature of the carburetor, and the relationship of [TH1>TH2> TH3] is established. That is, when the room temperature is considerably low (RT <T1), the carburetor heat retention temperature is set to a relatively high value TH1, and the carburetor is maintained at a high temperature during the combustion stop. Therefore, the time required from power-on to ignition is short.

On the other hand, when the room temperature is relatively high (RT
> T2), the carburetor heat retention temperature is set to a relatively low value TH3, and the carburetor is maintained at a low temperature during the combustion stop. Therefore, the ON time of the heater 14 that heats the vaporizer is shortened, and the power consumption is reduced.

When the room temperature is high, the combustion operation is unlikely to occur, and the user does not feel any discomfort even if it takes some time from turning on the power to igniting. There is no problem even if it is lower than the time.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the vaporizer heat retention temperature determined by the room temperature RT has three stages, but it may have two stages or four or more stages. Further, the set temperature compared with the room temperature RT may be manually changed according to the preference of the user. Of course, various modifications can be made without departing from the scope of the present invention.

[0043]

As described above in detail, according to the present invention, it is possible to provide a vaporization type combustion device which can reduce the power consumption and the power consumption while reducing the power consumption.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a hot-air heater body that is an embodiment of the present invention.

FIG. 2 is a block diagram of a control unit that controls a circuit of the warm air heater body shown in FIG.

FIG. 3 is a flowchart showing main part control of the microcomputer shown in FIG.

[Explanation of symbols]

14 ... Vaporizer heater, 19 ... Photocoupler, 25 ... Microcomputer, 33-38 ... Relay, 47 ... Room temperature detection part, 48 ... Vaporizer temperature detection part, 51 ... Operation switch.

Claims (1)

[Claims] 1. A vaporization type combustion apparatus for providing a vaporizer heated by a heater, and vaporizing kerosene supplied by the vaporizer to perform a combustion operation. A vaporizer temperature detection unit for detecting the temperature of the vaporizer. A room temperature detector for detecting room temperature, a heat retention temperature determining means for determining a heat retention temperature when combustion of the carburetor is stopped according to the room temperature detected by the room temperature detector, and a carburetor temperature during combustion stop When the carburetor temperature detected by the detection unit is lower than the heat retention temperature determined by the determination means, the carburetor preheating means for preheating the carburetor by energizing and controlling the heater is provided. Evaporative combustion device.