JP2002147756A - Controller for liquid-fuel combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a controller for liquid-fuel combustion equipment, in which when supply of a power source is stopped to a load such as kerosene pump and a burner, operation of a combustion equipment main-body is shut off for a certain period of time, supply of commercial power source is stopped at that time, and a wasteful power consumption in the dormant state is eliminated, and the safety of the equipment is improved. SOLUTION: In the controller for liquid-fuel combustion equipment, after an operation is stopped, the operation of a load, such as an electric heater 4 and a blower 9 is controlled by a controller 23, that is, an after-shutoff control is effected. Parallel circuits of a power-source on-switch 20 and a power-source- holding relay 26a are connected between the above load and an input of the controller 23. A power-source-shutoff output device 18 and a source-holding output device 19 are connected to the output of the controller 23. The devices 18 and 19 are connected to the relay 26a. The relay 26a is turned on when receiving a source-holding signal from the device 19, and it is turned off when receiving a source-shutoff signal from the device 18. Further, the source-shutoff signal is issued, when a certain time has elapsed after an operation-stop of the main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for a liquid fuel combustion apparatus which eliminates standby power consumption when the operation state of the liquid fuel combustion apparatus is stopped by turning off an operation switch of the liquid fuel combustion apparatus.

[0002]

2. Description of the Related Art A liquid fuel combustion apparatus burns various fuels and uses the heat of combustion through a heat exchanger or discharges the combustion air itself as warm air to the outside of the combustion apparatus for heating. In addition, the method of energization also has a part that differs from general home appliances.

[0003] That is, in a general household appliance, the operation of the device is started and stopped in synchronization with the operation of the operation switch. In the liquid fuel combustion device, the fuel is burned and the heat of combustion is generated by the combustion heat. Even if the operation switch is turned off while the exchanger or the like is being heated, the combustion device cannot be stopped at the same time in synchronization with the operation switch being turned off. Operation may be required.

That is, it is necessary to supply a power to a load by opening / closing an operation switch through an operation switch opening / closing signal via a control unit.

In recent years, an operation switch and a stop switch are provided in a control unit to operate a combustion device by a simple operation in many cases, and power is continuously supplied to the control unit. (See Japanese Patent Application Laid-Open No. 05-346265)

[0006]

In the above-described conventional liquid fuel combustion apparatus, in addition to operating the apparatus with a simple operation, the load operation is stopped in order to operate a part of the load continuously. However, power is always supplied to the control circuit and the control circuit is in an energized state, and the power is continued to be consumed, albeit slightly. For this reason, when the reduction of energy consumption has become a social issue in recent years, even if the power consumption is small, it is very wasteful.

SUMMARY OF THE INVENTION The present invention has a major object of reducing power consumption in a liquid fuel combustion apparatus, and focuses on this point to eliminate long-time useless standby power consumption after a stop switch OFF operation.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a control unit for controlling the operation of loads such as an electric heater and a blower fan. After performing the above, in the liquid fuel combustion heating device performing post-stop control to control the operation of the load by the control unit, a parallel circuit of a power-on switch and a power holding relay between the load and the input side of the control unit. A power cut-off output device and a power holding output device are connected to the output side of the control unit, and the power cut-off output device and the power hold output device are connected to the power holding relay. It is turned on in response to the power holding signal from the device, and is turned off when the power holding signal is turned off, or turned off in response to the power shutoff signal from the power shutoff output device. Device is obtained so as to output when the elapsed operation is stopped time of the body.

Thus, when there is no driving operation to the combustion device main body for a certain period of time, the supply of the commercial power is turned off at that time, so that unnecessary standby power consumption can be eliminated.

[0010]

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

1 and 2, reference numeral 1 denotes a liquid fuel combustion device, for example, a main body of a liquid fuel combustion type hot air heater, 2 denotes a burner installed at a lower portion in the main body 1, and 3 denotes a vaporizer for vaporizing kerosene. Reference numeral 4 denotes an electric heater for heating the vaporizer 3.

Reference numeral 5 denotes an oil pan, 6 denotes an oil supply tank for supplying kerosene to the oil pan 5, 7 denotes a kerosene pump that feeds the kerosene in the oil pan 5 to the vaporizer 3, and 8 denotes a nozzle attached to the tip of the vaporizer 3. Then, the vaporized gas is jetted to the burner 2.

Reference numeral 9 denotes a blower fan which feeds combustion air to the burner 2 and sends out high-temperature gas generated by the combustion to the outside of the main body 1. Reference numeral 10 denotes a hot air chamber, and a burner 2
Is installed so as to cover the upper part of the fan, and the air supplied from the air blowing fan 9 and the high-temperature combustion gas generated by the burner 2 are mixed to be warmed.

Reference numeral 12 denotes a hot air outlet from which the hot air generated in the hot air chamber 10 is discharged. Reference numeral 13 denotes an operation panel provided on the upper surface of the main body 1, and includes a power-on switch 20, an operation start instruction switch 14 shown in FIG.
5, a room temperature setting device 16, a room temperature detecting device 11, and an operation state indicator 17 for displaying a set room temperature, an actual room temperature, and the like.

FIG. 3 is a block diagram showing a control system according to an embodiment of the present invention. Reference numeral 23 denotes a control unit. 24 is a central control unit (microcomputer) constituting the central part of the control unit 23
The operation start instruction switch 14, the operation stop instruction switch 15, the room temperature setting device 16, the room temperature detection device 11, the vaporizer temperature detection device 21 and the flame state detection device 22 which have already been described are connected to the input side, and the electric heater 4. The kerosene pump 7, the blower fan 9, the operation state indicator 17, the power cutoff output device 18, and the power holding output device 19 are connected to the output side.

FIG. 4 shows a specific control circuit diagram.
25 is a commercial power supply. Reference numeral 4 denotes an electric heater, reference numeral 7 denotes a kerosene pump, reference numeral 9 denotes a blower fan, which are sequentially connected in parallel to the commercial power supply 25 via switches 4a, 7a, and 9a for supplying or stopping power from the commercial power supply 25, respectively. .

Reference numeral 20 denotes a power-on switch connected to one end of a commercial power supply 25 after the blower fan 9, to which a power holding relay 26a is connected in parallel.

The power holding relay 26 is connected to one end of the commercial power supply 25 and one end of a parallel circuit of the capacitor 27 and the control unit 23 as a switch for supplying or stopping the commercial power supply 25. The other end of the parallel circuit of the capacitor 27 and the control unit 23 is connected to the other end of the commercial power supply 25.

Reference numerals 4b, 7b, and 9b denote drive units, and the control unit 23
The switches 4a, 7a, 9a for supplying or stopping the power supply from the commercial power supply 25 to the electric heater 4, the kerosene pump 7 and the blower fan 9 are controlled based on the outputs of the switches.

Reference numeral 18 denotes a power cut-off output device, and 19 denotes a power holding output device, which are connected to a control unit 23 via a drive unit 26b.
Is connected to the output side. The driving section 26b controls ON and OFF of the power holding relay 26a.

FIG. 5 is an operation timing chart of the present invention, showing a change in power consumption in the operation of the control circuit of FIG.

The operation and the change in power consumption in such a configuration will be described with reference to FIGS. First, when the power-on switch 20 is turned on, power is supplied from the commercial power supply 25 to the control unit 23, and the coil side of the power-hold relay 26 a is excited by a power-hold signal from the power-hold output device 19. Even if 20 is pushed and released, the power holding relay 26a operates and the power is continuously supplied.

Next, when the operation start instruction switch 14 is operated to instruct the start of the operation, the central control unit 24 of the control unit 23 starts energizing the electric heater 4 of the vaporizer 3 and the vaporizer temperature. The temperature of the vaporizer 3 is detected through the detecting device 21, and when the temperature reaches a combustion startable temperature, the kerosene pump 7 is operated to increase the pressure in the vaporizer 3, and the vaporized gas is ejected from the nozzle 8 to the burner 2. At the same time, an igniter (not shown) is operated to cause the burner 2 to generate a flame.

When the presence of the flame is confirmed by the flame detecting device 22, the blower fan 9 is operated to activate the hot air chamber 1
0 and is discharged out of the main body 1 through the hot air outlet 12 of the hot air.

After the combustion is started, the central control unit 24
Controls the electric heater 4 while monitoring the signal of the vaporizer temperature detecting device 21 so that the vaporizer 3 is maintained at a temperature necessary for maintaining normal combustion.

Next, when the operation stop instruction switch 15 is operated to give an instruction to stop the operation, the central control unit 24 of the control unit 23 stops energizing the electric heater 4 of the vaporizer 3,
The kerosene pump 7 is weakly operated or stopped for a certain time, and the blower fan 9 is operated to cool the main body 1.

Next, when a sufficient time elapses until the cooling of the main body 1 is completed or safety is confirmed, and no operation is performed on the main body 1 even after a certain time (H) elapses. A power cut-off signal is output from the power cut-off output device 18, or the power hold signal from the power hold output device 19 is turned off (this is also referred to as a power cut-off signal), and the power holding relay 26a is turned off. Stop supplying power from

At this time, when an operation such as operation is performed on the main body 1, the power supply is not stopped until a certain time elapses without the operation.

Thus, the supply of the commercial power supply 25 to the loads such as the kerosene pump 7 and the blower fan 9 can be performed based on the control operation set in advance by the control unit 23, and the power supply to these loads is stopped. When the driving operation to the main body 1 is not performed for a certain period of time, the supply of the commercial power supply 25 is turned off at that time, so that unnecessary standby power consumption can be eliminated.

[0030]

As described above, according to the present invention,
After performing the operation stop operation of the liquid fuel combustion device body, in the liquid fuel combustion device performing post-stop control to control the operation of the load such as the electric heater and the blower fan by the control unit
A parallel circuit of a power-on switch and a power-hold relay is connected between the load and the input side of the control unit, and a power-off output device and a power-hold output device are connected to the output side of the control unit. And a power holding output device connected to the power holding relay. The power holding relay receives a power holding signal from the power holding output device, turns on the power holding signal, and turns off the power holding signal. The power-off signal is turned off in response to the power-off signal, and the power-off signal is output when a certain period of time has elapsed after the operation of the main body is stopped. Supply of commercial power to the combustion unit can be performed based on a control operation set in advance by the control unit, power supply to these loads is stopped, and there is no operation operation to the combustion device body. When was continued there is comes time,
By turning off the supply of the commercial power at that time, standby power consumption can be eliminated.

[0031] This also improves safety.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view for explaining a schematic configuration of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a combustion unit according to one embodiment of the present invention.

FIG. 3 is a block diagram illustrating control according to an embodiment of the present invention.

FIG. 4 is a control circuit diagram of one embodiment of the present invention.

FIG. 5 is a timing chart of one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body of liquid fuel combustion apparatus 4 Electric heater 7 Kerosene pump 9 Blower fan 14 Operation start instruction switch 15 Operation stop instruction switch 18 Power cut-off output device 19 Power supply output device 20 Power supply switch 23 Control unit 26a Power supply relay

Claims (1)

[Claims] A control unit (23) for controlling the operation of a load such as an electric heater (4) or a blower fan (9), and after performing a shutdown operation of the liquid fuel combustion device main body (1), In the liquid fuel combustion device which performs post-stop control for controlling the operation of the load by the control unit (23), a power-on switch (20) is provided between the load and an input side of the control unit (23).
And a parallel circuit of a power holding relay (26a) and a power cutoff output device (1) on the output side of the control unit (23).
8) and the power holding output device (19), and the power cutoff output device (18) and the power holding output device (19) are connected to the power holding relay (26a). The power supply holding output signal from the power supply holding output device (19) is turned on, and the power holding signal is turned off, or the power supply cutoff output device (18) is turned off in response to the power supply cutoff signal. A control device for a liquid fuel combustion device, wherein the shut-off signal is output when an operation stop state of the main body (1) has passed a certain time.