JPH11247748A - Engine ignition device and gas heat pump type air conditioner provided with engine ignition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure safety in maintaining an engine ignition device. SOLUTION: In an engine ignition device 28 wherein the electric charge given to a capacitor 30 is discharged to an ignition coil 32 based on an ignition pulse signal P, and the voltage intensified by this ignition coil 32 is applied to a spark plug 33 to generate arc, resulting in the drive of a gas engine to which fuel is supplied, the electric charges charged to the capacitor 30 is discharged to the ignition coil 32 by outputting ignition pulse signals even after applying voltage to the capacitor 30 and cutting off the fuel supply to the gas engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine ignition device and a gas heat pump type air conditioner provided with the engine ignition device.

[0002]

2. Description of the Related Art In recent years, a gas heat pump type air conditioner using a gas engine as a drive source of a compressor in an outdoor unit has been used. Such an air conditioner has an outdoor unit, an indoor unit, and a control device that controls the operation of the outdoor unit and the indoor unit, and the ignition of the gas engine is controlled by an engine ignition device.

[0003] This engine ignition device discharges electric charge applied to a capacitor from a DC-DC converter to an ignition coil based on an ignition pulse signal, and applies a voltage boosted by the ignition coil to a spark plug to generate an arc. Is generated, and the gas engine supplied with the fuel is operated.

As shown in FIG. 4, this engine ignition device supplies power to a DC-DC converter and outputs an ignition pulse signal at predetermined time intervals during operation of an engine in which fuel is supplied to a gas engine. The charge and discharge of the capacitor are repeated, and the operation of the engine is continued.
Further, the engine ignition device shuts off the power supply to the DC-DC converter and stops the output of the ignition pulse signal when the engine is stopped in which the fuel supply to the gas engine is shut off.

[0005]

However, when the engine is stopped, the capacitor may be charged with electric charges. Since this charging voltage is a high voltage of about 400 V, safety may not be ensured at the time of maintenance of the engine ignition device or the like.

SUMMARY OF THE INVENTION The object of the present invention is to provide an engine igniter and a gas heat pump type air conditioner which can ensure the safety during maintenance of an engine igniter and the like in consideration of the above circumstances. is there.

[0007]

According to the first aspect of the present invention,
The charge charged in the charging / discharging means is discharged to an ignition coil based on an ignition pulse signal, and a voltage boosted by the ignition coil is applied to a spark plug to generate an arc, thereby causing an engine to which fuel is supplied. In the engine ignition device to be operated, the ignition pulse signal is output even after the voltage is applied to the charging / discharging means and the fuel supply to the engine is shut off, and the charge charged in the charging / discharging means is transferred to the ignition device. It discharges to the coil.

According to a second aspect of the present invention, in the first aspect of the invention, the output of the ignition pulse signal is controlled by a control device together with the application of voltage to the charging / discharging means and the supply of fuel to the engine. Things.

According to a third aspect of the present invention, an outdoor unit, an indoor unit,
A gas heat pump type air conditioner having a control device for controlling the outdoor unit and the indoor unit, wherein a compressor mounted on the outdoor unit is driven by a gas engine; This engine ignition device discharges the electric charge charged in the charging / discharging means to an ignition coil based on an ignition pulse signal, and applies a voltage boosted by the ignition coil to a spark plug to generate an arc. The ignition / pulse signal is output even after the voltage is applied to the charging / discharging means and the fuel supply to the gas engine is interrupted, and the charging / discharging is performed. The electric charge charged in the means is discharged to the ignition coil.

According to a fourth aspect of the present invention, in the third aspect of the invention, the output of the ignition pulse signal is controlled by the control device together with the voltage application to the charging / discharging means and the fuel supply to the gas engine. Is what is done.

The invention described in claim 1 or 3 has the following operation.

The engine ignition device outputs the ignition pulse signal even after the interruption of the voltage application to the charging / discharging means and the interruption of the fuel supply to the engine (gas engine) to charge the charging / discharging means. Discharges the high-voltage charges to the ignition coil, so that the charging / discharging means is charged when the engine (gas engine) is stopped by interrupting the voltage application to the charging / discharging means and the fuel supply to the engine (gas engine). High-voltage charge can be lowered,
Safety during maintenance of the engine ignition device can be ensured.

The invention according to claim 2 or 4 has the following operation.

Since the output of the ignition pulse signal is controlled by the control device, it differs from the case where the distributor outputs the ignition pulse signal based on the rotation of the crankshaft of the engine (gas engine). Even when the rotation of the shaft is stopped, the ignition pulse signal is output and the high-voltage charges charged in the charging / discharging means can be reduced in voltage.

[0015]

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

FIG. 1 is a circuit diagram showing a refrigerant circuit in one embodiment of a gas heat pump type air conditioner according to the present invention.

As shown in FIG. 1, a gas heat pump type air conditioner 10 includes an outdoor unit 11 and a plurality (for example, 2 units).
) Indoor units 12A, 12B and a control device 13, and an outdoor refrigerant pipe 14 of the outdoor unit 11, an indoor unit 12A,
The 12B indoor refrigerant pipes 15A and 15B are connected.

The outdoor unit 11 is installed outdoors, and a compressor 16 is provided in the outdoor refrigerant pipe 14. An accumulator 17 is provided on the suction side of the compressor 16 and a four-way valve 18 is provided on the discharge side of the compressor 16 through the outdoor refrigerant pipe 14. The four-way valve 1
8 is connected to an outdoor heat exchanger 19 via an outdoor refrigerant pipe 14. An outdoor fan 20 that blows air toward the outdoor heat exchanger 19 is disposed adjacent to the outdoor heat exchanger 19. The compressor 16 is connected to a gas engine 25 via a flexible coupling 24, and is driven by the gas engine 25.

On the other hand, the indoor units 12A and 12B are installed indoors, and the indoor refrigerant pipes 15A and 15B are respectively provided.
The indoor heat exchangers 21A and 21B are disposed in the indoor refrigerant pipes 15A and 15B, and the electric expansion valves 22A and 22A are disposed near the indoor heat exchangers 21A and 21B, respectively.
22B is provided and configured. The indoor heat exchanger 21
A and 21B include these indoor heat exchangers 21A and 21B.
Indoor fans 23A and 23B that blow air to the air are arranged adjacent to each other.

The control device 13 controls the operation of the outdoor unit 11 and the indoor units 12A and 12B.
Fan drive motor 26 for gas engine 25, four-way valve 18 and outdoor fan 20 in outdoor unit 11, and fan drive motors 27A and 27B for driving electric expansion valves 22A and 22B and indoor fans 23A and 23B in indoor units 12A and 12B. Are respectively controlled.

When the four-way valve 18 is switched by the control device 13, the air conditioner 10 is set to the cooling operation or the heating operation. That is, the control device 13 controls the four-way valve 1
8 is switched to the cooling side, the refrigerant flows as shown by the solid line arrow, and the outdoor heat exchanger 19 is connected to the condenser and the indoor heat exchanger 2
1A and 21B become evaporators and enter a cooling operation state, and the indoor heat exchangers 21A and 21B cool the room. Also,
When the control device 13 switches the four-way valve 18 to the heating side, the refrigerant flows as indicated by the dashed arrow, and the indoor heat exchanger 21A,
21B functions as a condenser, and the outdoor heat exchanger 19 functions as an evaporator to be in a heating operation state, and the indoor heat exchangers 21A and 21B heat the room.

The control device 13 controls the electric expansion valve 22A and the electric expansion valve 22B during the cooling operation or the heating operation according to the respective air conditioning loads of the indoor unit 12A and the indoor unit 12B.
Are controlled to control the fan drive motors 27A and 27B of the indoor fans 23A and 23B, respectively.

Further, the control device 13 includes a gas engine 25
During operation of the gas engine 25, for example, the compressor 1
6 according to the discharge side refrigerant pressure from the gas engine 25, etc.
The fuel supply to the gas engine 25 is adjusted, and the fuel supply is stopped when the gas engine 25 is stopped.

The ignition of the gas engine 25 is controlled by an engine ignition device 28 (including the control device 13) shown in FIG.
It controls power supply to the C-DC converter 29 (that is, application of voltage to the capacitor 30 as charge / discharge means) and output of the ignition pulse signal P to the thyristor 31.

The engine ignition device 28 includes the control device 13, a DC-DC converter 29, a capacitor 30,
It has a thyristor 31, an ignition coil 32, and a spark plug 33. The DC-DC converter 29 includes an oscillator 34, a transformer 35, and a diode 36. The ignition coil 32 and the spark plug 33 are provided on the gas engine 25 side, and the control device 1
3. The DC-DC converter 29, the capacitor 30, and the thyristor 31 are installed on the same electronic circuit board 39.

Oscillator 34 of DC-DC converter 29
Is connected to a battery 38 via a converter switch 37.
(12V) and the converter switch 37
Is turned on and off by the control device 13, and the control device 13 controls the above-described power supply to the oscillator 34 of the DC-DC converter 29.

When the gas engine 25 is operating, the controller 13 turns on the converter switch 37 to supply 12 V DC power of the battery 38 to the oscillator 34. Then, the oscillator 34 converts the DC power of 12V into AC power or DC power with many changes, and the transformer 35
The 2V AC power or the like is boosted to 400V AC power, and the diode 36 rectifies the 400V AC power or the like to 400V DC power. When a DC voltage of 400 V formed by the DC-DC converter 29 is applied to the capacitor 30, the capacitor 30 charges a charge of 400 V, and the control device 13 supplies an ignition pulse signal P to the gate of the thyristor 31. When the thyristor 31 is outputted and turned on, the capacitor 30 discharges the charged electric charge to the ignition coil 32. Then, the ignition coil 32 generates a high voltage of about 20,000 V, the spark plug 33 generates an arc, and the gas engine 25 supplied with fuel is operated.

Further, the control device 13 includes a gas engine 25.
Is stopped, the converter switch 37 is turned off to cut off the power supply to the oscillator 34 of the DC-DC converter 29, and the ignition pulse signal P to the thyristor 31 is turned off.
Is stopped, the charging and discharging operations of the capacitor 30 are stopped, the arc from the spark plug 33 is cut off, and the gas engine 25 is stopped. However, in the present embodiment, after the gas engine 25 is stopped, the control device 13 outputs the ignition pulse signal P one or more times to discharge the capacitor 30 and cause the spark plug 33 to generate an arc.

That is, as shown in FIG.
When the gas engine 25 is operating, the gas engine 25
To the oscillator 3 of the DC-DC converter 29
4 and output the ignition pulse signal P to charge and discharge the capacitor 30 repeatedly. When the gas engine 25 is stopped, the fuel supply to the gas engine 25 is shut off and the converter switch 37 is turned off. It turns OFF to cut off the power supply to the oscillator 34 of the DC-DC converter 29, and immediately after the cutoff of the fuel supply to the gas engine 25 and the cutoff of the power supply to the oscillator of the DC-DC converter 29. Also outputs the ignition pulse signal P one or more times to charge the capacitor 30
The electric charge of 0V is forcibly discharged to the ignition coil 32, and an arc is generated in the ignition coil 32.

Therefore, according to the above embodiment, the following effects and advantages can be obtained.

Control device 13 for engine ignition device 28
Is interrupted by the power supply to the condenser 30 (that is, the power supply to the DC-DC converter 29) and the gas engine 25
Since the ignition pulse signal P is output even after the fuel supply to the capacitor 30 is interrupted, the high-voltage charge charged in the capacitor 30 is discharged to the ignition coil 32, and an arc is generated by the spark plug 33. When the gas engine 25 is stopped by applying a voltage (supplying power to the DC-DC converter 29) and shutting off the fuel supply to the gas engine 25, the high-voltage charge charged in the capacitor 30 can be reliably reduced to 0V or a low voltage. As a result, safety during maintenance of the engine ignition device 28 can be ensured.

The output of the ignition pulse signal P
Is different from the case where the distributor outputs the ignition pulse signal P based on the rotation of the crankshaft of the gas engine 25, even when the rotation of the crankshaft of the gas engine 25 is stopped.
By outputting the ignition pulse signal P, the high-voltage charge charged in the capacitor 30 can be reduced to 0 V or a low voltage. Therefore, not immediately after the gas engine 25 is stopped, the engine ignition device 2
The ignition pulse signal P is output immediately before the maintenance such as 8 so that the capacitor 30 can be set to 0V or low voltage.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. For example, in the above embodiment, the engine ignition device 28 is the gas engine 25 of the gas heat pump air conditioner 10.
Mentioned what applied to other engines (automobiles,
Engine such as a generator or an outboard motor).

[0034]

As described above, according to the engine igniter according to the present invention and the gas heat pump type air conditioner provided with this engine igniter, the engine igniter is fully charged.
Even after the voltage application to the discharging means and the interruption of the fuel supply to the engine, the ignition pulse is output to discharge the charge charged in the charging / discharging means to the ignition coil. And safety during maintenance of the engine ignition device and the like can be ensured.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a refrigerant circuit in one embodiment of a gas heat pump type air conditioner according to the present invention.

FIG. 2 is a circuit diagram showing an engine ignition device including the control device of FIG. 1;

FIG. 3 is a timing chart showing an ignition pulse signal, a capacitor voltage, and the like controlled by the engine ignition device of FIG. 2;

FIG. 4 is a timing chart showing an ignition pulse signal, a capacitor voltage, and the like controlled by a conventional engine ignition device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gas heat pump type air conditioner 11 Outdoor unit 12A, 12B Indoor unit 13 Control device 16 Compressor 25 Gas engine 28 Engine ignition device 29 DC-DC converter 30 Capacitor 32 Ignition coil 33 Spark plug 37 Converter switch 38 Battery P ignition pulse signal

Claims (4)

[Claims] An electric charge charged in the charging / discharging means is discharged to an ignition coil based on an ignition pulse signal, and a voltage boosted by the ignition coil is applied to a spark plug to generate an arc. In the engine ignition device for operating the supplied engine, the ignition pulse signal is output even after the voltage is applied to the charging / discharging means and the fuel supply to the engine is cut off.
An engine ignition device characterized in that the electric charge charged in the charging / discharging means is discharged to the ignition coil. 2. The engine ignition device according to claim 1, wherein the output of the ignition pulse signal is controlled by a control device together with application of a voltage to charge / discharge means and supply of fuel to an engine. 3. An air conditioner having an outdoor unit, an indoor unit, and a control device for controlling the outdoor unit and the indoor unit, wherein a compressor mounted on the outdoor unit is driven by a gas engine. In the above, the ignition of the gas engine is controlled by an engine ignition device, and the engine ignition device discharges the electric charge charged in the charging / discharging means to an ignition coil based on an ignition pulse signal, and is boosted by the ignition coil. The applied voltage is applied to the spark plug to generate an arc,
Operate the gas engine to which the fuel is supplied, output the ignition pulse signal even after the voltage is applied to the charging / discharging means and shut off the fuel supply to the gas engine, and charge the charging / discharging means. A gas heat pump type air conditioner, characterized in that the charged electric charge is discharged to the ignition coil. 4. The gas heat pump according to claim 3, wherein the output of the ignition pulse signal is controlled by the control device together with the application of voltage to the charge / discharge means and the supply of fuel to the gas engine. Type air conditioner.