JPH03274305A - Vaporization type burner - Google Patents

Abstract

PURPOSE:To improve comfortableness and prevent wasteful power consumption by starting energization of a carburetor heater before releasing an OFF control function if an ambient temperature falls during control function operating in a kerosine vaporization type burner, and holding a carburetor temperature near a set temperature. CONSTITUTION:The ambient temperature to be sensed by an ambient temperature sensor 47 is compared with a set ambient temperature to be set by a temperature setter 49, and if the ambient temperature becomes the set temperature or higher, OFF control means is operated, fuel supply to a carburetor is stopped, and energization of a carburetor heater is stopped. If the ambient temperature becomes the set temperature or lower and its temperature difference becomes a predetermined value or higher, the energization of the heater is restarted. The temperature to be detected by a carburetor temperature sensor 48 is held near a set temperature necessary to the vaporization in response to a temperature difference between the detected ambient temperature and the set temperature. With the structure, combustion can be smoothly restarted, comfortableness is improved, and wasteful power consumption is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a vaporizing combustion device equipped with a vaporizer for vaporizing kerosene.

(Conventional technology) In conventional vaporization combustion devices, when the power is turned on, electricity starts to flow to the heater to heat the vaporizer, and when the vaporizer temperature exceeds the set temperature, kerosene is poured from the oil storage tank into the vaporizer. At the same time that the fuel is supplied, the igniter is operated, and the vaporized gas is ignited in the burner section, thereby starting a combustion operation. Then, when the room temperature rises due to the combustion operation and becomes higher than a certain temperature Δ with respect to the set room temperature 1, that is, when the room temperature = to + Δt, the off control function is activated and the kerosene is refueled to the vaporizer. is stopped, the combustion operation is stopped, and energization to the heater that heats the carburetor is also stopped. In this state, when the room temperature falls below to, the off control function is canceled and power to the heater is restarted, and when the temperature of the vaporizer exceeds the set temperature, kerosene is supplied from the oil storage tank to the vaporizer and the igniter is turned on. It was activated and the combustion operation was started again.

(Problem to be solved by the invention) However, when the combustion operation is stopped due to the function of the off control function, the power supply to the heater that heats the carburetor is stopped, and the power supply to the heater is restarted when the room temperature drops. If the off control function were to be performed when the off control function is canceled, even if the off control function is canceled, the vaporizer temperature would have to wait for a long time to reach the set temperature required for vaporization operation, and therefore the off control function would be canceled. There was a problem in that the combustion operation could not be restarted smoothly when For this reason, when the combustion operation was resumed, the room temperature dropped significantly and comfortable room temperature control could not be achieved.

Therefore, in the present invention, even if the combustion operation is stopped and the power supply to the heater that heats the carburetor is stopped due to the operation of the off control function, if the room temperature subsequently drops, the power supply to the heater is stopped before the off control function is canceled. Since the vaporizer temperature is maintained at a temperature close to the set temperature required for vaporizing operation, when the off control function is released, combustion operation can be restarted smoothly and comfortable room temperature control can be achieved. I can do it,
Moreover, the present invention aims to provide a vaporization type combustion device that can prevent wasteful power consumption by the heater as much as possible.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a vaporization type combustion device that is provided with a vaporizer heated by a heater and performs a combustion operation by vaporizing kerosene supplied with the vaporizer. A vaporizer temperature detection section that detects the temperature of the vaporizer, a room temperature detection section that detects the room temperature, a temperature setting section that sets the room temperature, and a room temperature detected by the room temperature detection section that is compared to the set room temperature of this temperature setting section. an off control means that stops the supply of kerosene to the vaporizer and stops the combustion operation when the temperature rises above a preset predetermined temperature difference;
or a reburning means for refueling the carburetor with kerosene and restarting the combustion operation when the temperature drops to a temperature slightly higher or lower than the set room temperature and the temperature of the vaporizer is equal to or higher than a preset set temperature; and a temperature setting. When the room temperature detected by the room temperature detection unit becomes higher than a preset temperature difference with respect to the set room temperature of the unit, the power supply to the heater is controlled to stop, and when the temperature difference becomes less than the predetermined temperature difference, power supply to the heater is started and vaporization is started. The apparatus is provided with heater control means for maintaining and controlling the chamber temperature at a temperature lower than the set temperature and at different temperature levels depending on the temperature difference between the set room temperature and the detected room temperature.

(Function) In the present invention having such a configuration, when the room temperature becomes higher than the predetermined temperature difference from the set room temperature during combustion operation, the supply of kerosene to the vaporizer is stopped and the combustion operation is stopped. Power to the heater that heats the vessel is also stopped.

In this state, when the room temperature becomes equal to or less than a predetermined temperature difference from the set room temperature, power supply to the heater is restarted. The vaporizer temperature at this time is maintained at a temperature close to the set temperature necessary for the vaporization operation, depending on the temperature difference between the detected room temperature and the set temperature. The holding temperature at this time varies in level depending on the temperature difference.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In this embodiment, the present invention will be described in which the present invention is applied to a forced air supply/exhaust type hot air heater.

Figure 1 shows the circuit configuration of the main body of the hot air heater, in which one terminal of a power plug 1 is connected to the power line p via a current fuse 2, and the other terminal is connected via a vaporizer temperature fuse 3. and is connected to the power supply line p2.

A primary winding of a power transformer 4, a capacitor 5, and a TNR element 6 are connected between the power lines R1 and R12, respectively.

Also, between the power lines it, N2, there is a normally open contact 33a of a first relay 33, which will be described later, and a second relay 34, which will be described later.
The injection motor 7 is connected in series through the two-contact switching contact 34a.
The combustion motor 8 is also connected via a normally open contact 35a of a third relay 35, which will be described later. The convection motor 7 drives a convection fan to circulate indoor air through a heating chamber that is shielded and separated from the combustion chamber. Further, the combustion motor 8 drives a combustion fan to forcibly intake and exhaust outside air into the combustion chamber.

The switching contacts 34a of the second relay 34 are connected to the strong rotation terminal and the weak rotation terminal of the convection motor 7, respectively.

A series circuit of a capacitor and a resistor 10 is connected in parallel to the normally open contact 33a of the first relay 33, and a series circuit of a capacitor 11 and a resistor 12 is connected in parallel to the normally open contact 35a of the third relay 35. It is connected.

Further, a series circuit including a carburetor heater 14 and a bidirectional three-terminal thyristor 15 is connected between the power supply lines ρl + fl 2 via an operation switch 13.

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 a resistor 18 and a light receiving element 19a of a photocoupler 19 is connected between the gate and the terminals.

Furthermore, the power line D3. between flz and the operation switch 13 and a normally open contact 36a of a fourth relay 36, which will be described later.
A normally open contact 37 of a fifth relay 37, which will be described later, is connected in series with
A and a diode bridge circuit 20 are connected in series, and a capacitor 21 and an ignition transformer 22 are connected in series with a normally open contact 38a of a sixth relay 38, which will be described later. The diode bridge circuit 20 connects the connection point between the cathodes and anodes of the two diodes on one side to the normally open contact 37a of the fifth relay 37, and connects the cathodes and anodes of the two diodes on the other side. The point is connected to the power supply line 12.

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 supply of kerosene to the vaporizer 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 a control section that controls the hot air heater main body circuit, and 25 is a microcomputer.

Inverters 26°27, 28, 29 are connected between each output terminal of the microcomputer 25 and the opening terminal.
, 30, 31, and 32, the first relay 33 and the second relay
A series circuit of the relay 34, the third relay 35, the fourth relay 36, the fifth relay 37, the sixth relay 38, and the resistor 39 and the light emitting element 19b of one of the photocouplers is connected.

Each of the relays 33 to 38 has a diode of 40°41.4.
2, 43, 44, and 45 are connected in parallel, and the resistor 39 and the light emitting element 19b of the photocoupler 19
A resistor 46 is connected in parallel to the series circuit.

Further, the output terminals of a room temperature detection section 47 for detecting the room temperature and a vaporizer temperature detection section 48 for detecting the temperature of the vaporizer are connected to the manual terminal with an A/D conversion function of the microcomputer 25. Further, another input terminal of the microcomputer 25 is connected to an output terminal of a temperature setting section 49 for setting the room temperature.

Further, a series circuit including a resistor 50 and an operation switch 51 is connected between another input terminal of the microcomputer 25 and VSS. A connection point between the resistor 50 and the operation switch 51 is grounded via a resistor 52.

The operation switch 51 is the operation switch 1 shown in FIG.
It is designed to be linked with 3.

Further, the microcomputer 25 outputs display data such as set room temperature and detected room temperature to the display section 53.

FIG. 3 is a flowchart showing main part control by the microcomputer 25. In this control, first, it is checked with Sl to see if the operation switch 51 is turned on, and if it is turned on, then the detected room temperature is changed to tl in S2. (tl-to-Δtz). Note that to is the temperature set by the four temperature setting sections.

If the detected room temperature≧t2, the solenoid valve 24 is closed by the extinguishing sequence, which is an off control means, to stop the oil supply to the carburetor and stop the combustion operation.

In addition, the thyristor 15 is controlled to be non-conductive so that the vaporizer heater 14
Stop the power supply to. (Heater Control Means) If the detected room temperature is <12, it then checks with Sl to see if combustion is in progress, and if combustion is in progress, the carburetor set temperature is set to T necessary for vaporization operation. The energization to the vaporizer heater 14 is controlled as follows. Also, if combustion is not in progress, then S4 detects the detected room temperature.
. Check whether the detected room temperature is high or not. If so, the vaporizer set temperature is T required for vaporizing operation. as vaporizer heater 1
Controls power supply to 4. (Heater control means) Set the vaporizer temperature to T. When the power supply to the vaporizer heater 14 is controlled, the vaporizer temperature T becomes T at S. A check is made to see if the value is above 5 or not, and if TaT, the ignition sequence is started to start the combustion operation. (Reburning means) In the above S4, the detected room temperature kt. If so, then in S6 the detected room temperature kt and ltl room temperature t are detected. Ten Δt.

(Δt2)), and if the detected room temperature is less than tl, the vaporizer set temperature is set to TI (Δt2) and the energization to the vaporizer heater 14 is controlled. If the detected room temperature is kt, the vaporizer set temperature is set to T2 ((TI) and the energization to the vaporizer heater 14 is controlled. ＞If the detected room temperature≧t continues for more than a preset period of time, the solenoid valve 2 is activated by the extinguishing sequence.
4 to stop the fuel supply to the carburetor and stop the combustion operation. Further, the thyristor 15 is controlled to be non-conductive to stop the supply of electricity to the vaporizer heater 14.

In this embodiment having such a configuration, when the power plug 1 is inserted into the power outlet and the operation switch 51 is turned on, the operation switch 13 is also turned on in conjunction with the operation. As a result, the microcomputer 25 controls the thyristor 15 via the photocoupler 19 and controls the energization of the vaporizer heater 14 while checking the vaporizer temperature from the vaporizer temperature detection section 48.

and a set temperature T at which the vaporizer temperature T is suitable for starting combustion. For example, when the temperature reaches 280° C., the third relay 35 is turned on. When the third relay 35 is turned on, its normally open contact 35
a is closed, and the combustion motor 8 starts operating. This starts pre-purging, and if residual gas remains in the combustion chamber, it will be discharged.

After a predetermined period of time has elapsed, the microcomputer 2
5 is the fourth relay 36, the fifth relay 37 and the sixth relay 3
Turn on 8 in sequence. As a result, the normally open contacts 36a, 37a
, 38a are closed in sequence.

In this way, the electromagnetic valve 24 is opened and kerosene is supplied to the carburetor, and the ignition transformer 22 is operated for a certain period of time by a timer provided inside to start the ignition operation. Thereby, the kerosene gas vaporized by the vaporizer is ignited by the ignition transformer 22 in the burner section, and combustion operation is started.

When the combustion operation is started and a certain period of time has elapsed, the first relay 33 is turned on and its normally open contact 33a is closed, which causes the convection motor 7 to operate and blow warm air into the room to warm the room. It becomes like this. In this way, the room temperature gradually rises.

Thereafter, the room temperature detected by the room temperature detection section 47 becomes the set room temperature t set by the temperature setting section 4. When tl becomes higher than Δt2, that is, at point P in FIG. 4, the off control function operates and turns off the fourth relay 36, the fifth relay 37, and the sixth relay 38. The solenoid valve 24 is then closed, the supply of kerosene to the carburetor is stopped, and the combustion operation is stopped. At this time, the combustion motor 8 continues to operate for a while, and post-verge control is performed to discharge the residual gas accumulated in the combustion chamber to the outside.

Also, the thyristor 15 is controlled to be non-conductive and the vaporizer heater 1
4 is stopped.

When the combustion operation is stopped, the room temperature begins to drop. Then, when the room temperature falls below t2, the thyristor 15 is controlled to be conductive, and energization to the vaporizer heater 14 is started. At this time, the vaporizer heater 14 has a vaporizer temperature T of 72, for example 1.
The energization is controlled so that the temperature is maintained at 50°C. In this state, when the room temperature further decreases to below t1, the vaporizer heater 14 is controlled to be energized so that the vaporizer temperature T is maintained at T3, for example, 230°C.

The room temperature further drops. Afterwards, that is, at point P2 in FIG. 4, the off control function is canceled. Further, the vaporizer heater 14 has a vaporizer temperature T of T. That is, energization is controlled so that the temperature is maintained at 280°C.

After the predetermined bribarge control is performed, the vaporizer temperature T becomes T. 4th, 5th, and 6th relays 36
, 37 and 38, the solenoid valve 24 opens and the ignition transformer 22 operates, so that the combustion operation is immediately restarted.

In this way, the room temperature is the set temperature t. Δt2 higher than t2
When this temperature is reached, the off control function is activated to stop the combustion operation and the power supply to the carburetor heater 14.

However, in this state, when the room temperature falls below t2, energization to the vaporizer heater 14 is started. At this time, the energization control to the vaporizer heater 14 is performed so that the vaporizer temperature T is T2-150°C.
It is done in such a way that it holds.

Furthermore, when the room temperature falls below t, the energization to the vaporizer heater 14 is controlled so that the vaporizer temperature T is maintained at -230°C. Furthermore, the room temperature is the set temperature t. When the temperature falls below, the energization to the vaporizer heater 14 is controlled so that the vaporizer temperature T is maintained at the set temperature To ``'' 280° C. suitable for vaporization, and the combustion operation is restarted.

Therefore, the room temperature is the set temperature t. When restarting the combustion operation when the temperature falls below, the temperature of the vaporizer is set to T, which is suitable for the vaporization operation. Since the room temperature has reached a temperature close to t, the room temperature is the set temperature t.
The combustion operation can be smoothly restarted relatively quickly after the temperature drops below 0. Therefore, the room temperature when the combustion operation is restarted is the set temperature t. Comfortable room temperature control can be achieved without significantly decreasing the temperature.

In addition, during the period when the off m control function is operating, the vaporizer temperature is controlled to T2 - 150°C and T+ = 230°C, respectively, depending on the temperature difference between the detected room temperature and the set room m to o. , always keep the vaporizer temperature T at T. −
Compared to the case where the temperature is maintained at 280° C., the power consumption by the vaporizer heater 14 is reduced, and wasteful power consumption can be prevented as much as possible.

For example, as shown at point P in Fig. 4, when the off control function is activated and the room temperature drops below t2, the energization control to the vaporizer heater 14 is performed so that the vaporizer temperature T is maintained at T2 - 150°C. It will be done.

In this state, if the room temperature continues for a certain period of time from t to t2 without falling below t, the vaporizer heater 14 may be activated even though the room temperature is below t2.
The energization to is controlled to stop.

This further prevents wasteful power consumption by the vaporizer heater 14.

In the above embodiment, the temperature at which the off control function is canceled is the set temperature t. Although the closing temperature is not necessarily limited to this, the temperature may be set to a temperature slightly higher or lower than the set temperature.

Although the above embodiments have described the present invention applied to a forced air supply/exhaust hot air heater, the present invention is not necessarily limited to this, and the hot air heated in the combustion chamber may also be blown directly into the room. It may be a hot air heater of a type called a so-called fan heater, and in short, it can be applied to any combustion device as long as it is equipped with a vaporizer that vaporizes kerosene.

[Effects of the Invention] As described in detail above, according to the present invention, even if the combustion operation is stopped due to the operation of the off control function and the power supply to the heater that heats the carburetor is stopped, if the room temperature subsequently falls, the off control is activated. The heater is energized before the off control function is canceled, and the vaporizer temperature is maintained close to the set temperature required for vaporization, allowing smooth combustion when the off control function is canceled. Therefore, it is possible to provide a vaporization type combustion device that can restart the heating, provide comfortable room temperature control, and prevent wasteful power consumption by the heater as much as possible.

[Brief explanation of drawings]

The figures show an embodiment of the present invention. Fig. 1 is a circuit diagram of the main body of the hot air heater, Fig. 2 is a circuit diagram of the control section that controls the main body circuit of the hot air heater, and Fig. 3 is a circuit diagram of the main body of the hot air heater. Figure 1154 is a flowchart showing main part control by the microcomputer in the figure, and a graph showing the relationship between room temperature change and vaporizer set temperature. 14... Vaporizer heater, 15... Bidirectional 3-terminal thyristor, 19... Photo coupler, 22... Ignition transformer, 24... Solenoid valve, 25... Microcomputer, 33-38 ...
Relay 47... Room temperature detection section, 48... Vaporizer temperature detection section, 49... Temperature setting section.

Claims (1)

[Claims] In a vaporization type combustion device that is provided with a vaporizer heated by a heater and performs a combustion operation by vaporizing kerosene supplied with the vaporizer, the vaporizer temperature detection section detects the temperature of the vaporizer, and the room temperature is detected. a room temperature detection section that sets the room temperature; a temperature setting section that sets the room temperature; and a temperature setting section that controls the flow of kerosene to the vaporizer when the room temperature detected by the room temperature detection section becomes higher than a preset temperature difference with respect to the set room temperature of the temperature setting section. an off control means for stopping the combustion operation by stopping fuel supply; and a detected room temperature decreases to a set room temperature, or a temperature slightly higher or slightly lower than the set room temperature while the combustion operation is stopped by the off control means; and a re-combustion means for refueling the vaporizer with kerosene to restart the combustion operation when the vaporizer temperature is equal to or higher than a preset temperature; When the detected room temperature becomes higher than a preset temperature difference, the energization to the heater is controlled to be stopped, and when the temperature becomes lower than the predetermined temperature difference, the energization to the heater is started, and the vaporizer temperature is lowered to below the preset temperature. 1. A vaporization type combustion apparatus, characterized in that a heater control means is provided for controlling the temperature to be maintained at different temperature levels depending on the temperature difference between the set room temperature and the detected room temperature.