JP6748698B2 - Simple emergency power supply device - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention uses a small gas engine and an alternator to supply emergency power with high efficiency even when a power failure accident occurs intermittently a number of times or many times. The present invention relates to a simplified emergency power supply device having a voice output configuration (speaker output configuration) for supplying emergency power within a few minutes from a voice output unit.

As a small-sized emergency power supply device (such as an uninterruptible power supply device) for household use or for signs etc. in the event of a power outage of less than 10 kW in case of a disaster, there are a storage battery type and a system for generating power by an engine. The storage battery has advantages such as a short time from power failure to lighting and simple operation, but has a big disadvantage that the mass is increased.

For example, 1 kW of electricity can be supplied for 72 hours (there is a prospect for restoration of the infrastructure destroyed by the disaster 3
(Day) Try to find the mass of the storage battery when supplying. Since 1kW is 1kJ/s, it will be 1kJ/s×72×3600s=259200kJ in 72 hours. However, since the storage battery is DC, if the efficiency of the inverter that converts this to AC is 93%, then at least 259200 kJ/0.93 = 278710 kJ (≈2797 MJ) of electrical energy must be stored in the storage battery. Even a lithium-ion battery with a large energy density (electrical energy per unit mass) is 100 Wh/kg at most, so 100 J/s×3600s=360 000 J=360 kj, that is, 360 kj per kg. Therefore, the mass of the storage battery is 278710kJ/(360kJ/kg) = 774kg.

On the other hand, the power generated by the engine can be generated as long as the fuel continues, but it takes several tens of seconds until the engine is started and a stable electric output can be supplied, and during this period, the power failure will continue. Further, as described above, in a small-sized device, since the remaining power is small, if the required power (electric load) suddenly increases, the rotation speed of the engine decreases and the power supply cannot keep up, or the engine stops. Sometimes. Thus, there were major problems with both the storage battery type and the engine generator.

Further, as an AC uninterruptible power supply device, there is Patent Document 1, but this document is not for commercial power supply, but is used in a mountain area, a remote island, etc. The engine generator is used in this device, but the type of the engine is unknown, and it is not necessarily an excellent engine generator.

Further, in Patent Document 2, although the uninterruptible power supply device is composed of a storage battery and an engine, the capacity of the storage battery is reduced so that power can be supplied from the engine. In the meantime, when the commercial power supply is lost, the cited document 2 cannot deal with it at all. The type of engine in Patent Document 2 is also unknown, and it is hard to say that it is an excellent engine generator.

In Patent Documents 1 and 2, both are uninterruptible power supply devices, but in particular, even if a small and small-capacity uninterruptible power supply such as a personal computer is covered by another means, it is a relatively long period of 1 to 3 days. There is no excellent engine generator that can use the daily power supply even during a power failure. Furthermore, there is a simple emergency power supply device with a voice output configuration that supplies emergency power within a short time from a voice output unit (speaker output configuration) provided in place at the same time as the power outage. There wasn't.

Japanese Patent Laid-Open No. 5-207684 JP, 2001-45681, A

The problem (technical problem or purpose, etc.) to be solved by the present invention cannot be dealt with instantaneously at the time of power failure, or even if the power failure continues for about 1 to 3 days (a large-scale disaster, for example, 3. 11) To provide a small-sized emergency power supply device that easily supplies power not only to homes but also to traffic lights, various signs, and surveillance cameras. In particular, it is to realize that even if a commercial power source is lost several times due to a disaster or the like (such as the Kumamoto Earthquake), it can be sufficiently dealt with. Furthermore, it is also desirable to realize the existence of an emergency power supply device having a voice output configuration in which emergency power is supplied within a short time from a voice output section (speaker output configuration) provided at a proper place during a power failure.

Therefore, as a result of earnest studies and researches by the inventor to solve the above-mentioned problems, the invention of claim 1 is applied to the gas engine for a small LPG having a displacement of 50 cc to 500 cc and an alternating current for generating power by starting the gas engine. The engine includes a generator, an engine control unit having an engine battery, a plurality of on/off switches, and a general control unit for controlling the on/off switches, and the gas engine cylinder has two spark plugs. The first ignition plug, the intake valve, the second ignition plug, and the exhaust valve are provided around the periphery of the cylinder, and the intake air from the intake valve is planar in the cylinder. In view of the above, it is configured so as to flow in a tangential direction or a direction close to a tangential line, and in a normal state, the power supply side of the commercial power source is energized via the ON/OFF switch, and From the moment the commercial power source is lost due to an accident or the like, the engine battery and the engine control unit start the gas engine having the above-described configuration within about one or two minutes, and the AC power generator causes the starting power to start. power to an AC electric power generated by the gas engine as the power is supplied to the power supply side, the time until the return of the said both the up time of return of the commercial power supply continues to feed at power of only the gas engine commercial power source A single cylinder filled with 20 kg of propane can supply 1 kW of electric power for at least 72 hours by using only the electric power of the gas engine. The above problem is solved by providing a simplified emergency power supply device characterized by providing a charging action to the engine battery even with respect to electric power.

According to a second aspect of the present invention, in the simplified emergency power supply device according to the first aspect, the intake valve, the first spark plug, the exhaust valve, and the second spark plug of the gas engine are 4 and the like. The above-mentioned problem was solved by using a simple type emergency power supply device characterized by being arranged for each minute. According to a third aspect of the present invention, in the simple type emergency power supply device according to the first or second aspect, the main flow of the air-fuel mixture flowing into the cylinder of the gas engine does not directly hit the ignition point of the spark plug, and The above problem is solved by the simple emergency power supply device, which is configured to flow in the vicinity thereof.

According to a fourth aspect of the present invention, in the simplified emergency power supply device according to the first, second or third aspect, a flywheel is provided between the gas engine and the AC generator. The above-mentioned problems were solved by using a simple type emergency power supply device. The invention of claim 5 is the simplified type emergency power supply device according to claim 4, wherein the flywheel and the AC generator are spline-coupled. By doing so, the said subject was solved.

The invention of claim 6 is the simplified emergency power supply device according to claim 1, 2, 3, 4 or 5, wherein a plurality of the on/off switches are turned on/off by a signal from the general control unit. The above problem is solved by using a simple type emergency power supply device characterized in that the power is supplied from the engine battery having a low voltage equivalent to that of the engine control unit. The invention of claim 7 is the simple type emergency power supply apparatus according to claim 1, 2, 3, 4, 5 or 6, and the simple type emergency power supply apparatus according to claim 1, 2 or 3. The above problem is solved by using a simple type emergency power supply device characterized in that the on/off switch is an on/off relay switch.

According to the invention of claim 1, the present invention can satisfactorily deal with the case where the commercial power supply is lost a plurality of times due to a great disaster or the like. According to the present invention, even if the power failure cannot be dealt with instantly (only about several tens of seconds are in the power failure state), even if the power failure lasts for 1 to 3 days, it can be sufficiently dealt with, and especially in a disaster or the like. Even if the commercial power supply is lost multiple times (such as the Kumamoto earthquake), some of the power is used to replenish the previously consumed electric energy, so there is an advantage that it can sufficiently cope with repeated power outages. .. In addition, as an effect of LPG, it exists everywhere in Japan, and extremely efficient support and restoration can be made possible in an emergency.

In the inventions of claims 2 to 3, in particular, the combustion efficiency can be increased and the startup of the gas engine can be made favorable. In the inventions of claims 4 and 5, the engine stall of the gas engine can be prevented. According to the invention of claim 6, control can be performed easily and surely. According to the invention of claim 7, the relay device can be provided at a low cost with a simple structure.

It is a normal-time block diagram of the present invention when electric power is normally supplied from a main power source such as an electric power company or a private power generator. It is a block diagram of a state when a gas engine operates and it is supplying electric power stably from an alternator in an emergency. It is a chart showing a flow of the present invention. (A) is a plan view of a single cylinder part, (B) is an enlarged sectional view taken along the line Y1-NOX of (A), and (C) is an enlarged sectional view taken along the line Y2-Y2 of (A). is there. It is an expansion state perspective view of a single cylinder part. (A) is an enlarged side view in which a part of the crankshaft and the flywheel of the gas engine are separated, and (B) is the flywheel after the flywheel is fixed to part of the crankshaft. FIG. 3 is an enlarged state view showing a partial cross section where the drive shaft of the AC generator is mounted. (A) is a partially enlarged side view showing a partial cross section of another embodiment of a flywheel mounting portion, and (B) is a sudden increase in electric load under the condition that a flywheel having a large rotational inertia moment is mounted. 6 is a graph comparing the reduction of the engine speed and the effect of improving the output recovery characteristic due to. FIG. 4 is a normal configuration diagram of the present invention when power is normally supplied from a main power source such as an electric power company or a private power generator, and in particular, is a diagram illustrating a voice output by providing a voice output unit. FIG. 4 is a configuration diagram of a state in which the gas engine is operating and electric power is being stably supplied from the AC generator in an emergency, and particularly, is a diagram illustrating a voice output by providing a voice output unit. It is a flowchart figure of the audio|voice output part circuit built in in this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are a configuration diagram and an operation state diagram of the present invention. FIG. 1 is a configuration diagram in a normal state, and FIG. 2 is an operation state diagram in an emergency. In these figures, if single-phase alternating current or direct current originally requires two wirings, if three-phase alternating current, three wirings are required, but to make the drawings easier to see, one line is representative and the connection relationship is shown. I will represent it.

FIG. 1 shows a state in which commercial power is supplied from a private power generation facility such as a power plant, a factory, or a ship during normal times. As a main configuration of the present invention, a small gas engine 1, an alternator 3 for generating power by starting the gas engine 1, a plurality of on/off switches, and a general control unit for controlling the on/off switches. 61 (also referred to as “TCU”), an engine control unit 62 (also referred to as “ECU”) supplied from the low-voltage engine battery 5, and the like are provided.

In FIG. 1, a power generator including a gas engine 1, a fuel supply device 2, and an AC generator 3, and a gas cylinder 29 for liquefied petroleum gas (LPG) is used as fuel. Since it is a small-sized emergency power source, the gas engine 1 has a small displacement of about 50 cc to about 500 cc or less. The gas engine 1 is a multipoint ignition engine in which one cylinder 11 is provided with two spark plugs 13, 13. This shortens the engine start time, increases the chances of ignition, and realizes rapid combustion to improve thermal efficiency (fuel consumption).

In the gas engine 1, a cylinder head 12 is provided above a cylinder 11 in which a piston 10 is vertically movable, and a lower surface of the cylinder head 12 is formed as a flat spherical concave surface 12a. Two spark plugs 13, an intake valve 15, and an exhaust valve 17 are provided when seen in a plan view from the upper surface side of the cylinder head 12 (or the cylinder 11). Specifically, the intake valve 15, the first spark plug 13, the exhaust valve 17, and the second spark plug 13 are circumferentially arranged in four equal parts (see FIG. 4(A)). ..

The radius of curvature R of the flat spherical concave surface 12a is located at an arbitrary point P on the central axis n of the cylinder 11, as shown in FIG. 4(B). Further, the central axes m of the two spark plugs 13, the central axis w of the intake valve 15 and the central axis u of the exhaust valve 17 are configured to pass on the point P, respectively. That is, both the central axis m of the spark plug 13, the central axis w of the intake valve 15 (the inlet portion of the intake port 14) and the central axis u of the exhaust valve 17 (the outlet portion of the exhaust port 16) have a radius of curvature R. It exists on the normal line of the spherical surface of the flat spherical concave surface 12a. Such a three-dimensional combustion chamber is configured.

In particular, as shown in FIG. 4A, in the intake port 14 for allowing the intake valve 15 to inhale, the intake air from the intake valve 15 is in a tangential direction or a direction close to a tangent line when the cylinder 11 is viewed in a plan view. To flow into the cylinder 11 to form a swirl (swirl G). This swirl S (vortex) is generated when the piston 10 in the cylinder 11 descends.

The directionality may be secured even in the swirl S (vortex). In order to secure sufficient directionality, the following configuration is often adopted. In particular, a bulging portion 12b having a substantially crescent shape or a trapezoidal mountain shape is provided on the lower surface of the flat spherical concave surface 12a on the front side of the first one spark plug 13 and the swirl S (vortex flow). Is provided on the downstream side of the. The details of the swirl S (vortex) will be described in detail so that the main flow of the swirl S (vortex) does not hit the ignition point of the first spark plug 13 directly and flows in the vicinity thereof (FIG. 4). (See (A)].

The bulging portion 12b has a substantially crescent shape and a substantially triangular vertical section (see FIGS. 4A and 4B), and serves to change the flow of the swirl S (vortex flow). Yes, the highest height may be around 1 mm. The swirl S (vortex flow) may cause a small turbulent state even at the bulging portion 12b. Also, the bulging portion 12b is formed in the same shape as the crescent-type bulging portion 12b described above even if the bulging portion 12b is formed into a trapezoidal mountain shape in which Mt. Produce the effect of. Further, the bulging portion 12b is not limited to the shape as long as it can change the directionality of the swirl S (vortex).

Further, in FIGS. 4A and 4B, it is preferable that the flow rate of the mainstream versus the anti-mainstream is about 8:2. Due to the existence of the anti-main flow, turbulence of the air flow is generated, and mixing can be improved and gas (LPG) combustion can be further promoted. Such a configuration is a great advantage that does not exist in the past. In particular, as shown in FIG. 5, the main flow in the swirl S (vortex) receives a counter-main flow in the cylinder 11 and gradually decreases in speed, and at the same time presents a fine turbulent state. That is, the air that is a gas (air) and the LPG that is a gas can be naturally integrated.

If the strong swirl S (vortex) main stream hits the ignition point (spark gap) of the spark plug 13 directly, the temperature of this portion decreases (for example, 450° C. or less), free carbon is generated, and the tip is polluted. As a result, the sparks are less likely to fly, but new air-fuel mixture is allowed to flow into the ignition point (spark gap) while avoiding a direct hit at this tip. Once the fire is generated, the swirl S (vortex) causes the flame to spread extremely rapidly in a three-dimensional manner into the combustion space (the entire space defined by the cylinder head 12, the inner wall surface of the cylinder 11 and the top surface of the piston 10). The combustion efficiency of gas can be significantly increased.

This combustion efficiency is extremely good in combination with the three-dimensional combustion chamber as the spherical surface of the flat spherical concave surface 12a having the radius of curvature R and the swirl S (vortex) avoiding the ignition point of the ignition plug 13. The following effects are obtained [see FIGS. 4(A) and 4(B)]. Furthermore, there is the greatest advantage that the gas engine 1 can be started up very immediately after a power failure. The angle θ between the central axis m of the spark plug 13 and the central axis n of the cylinder 11, the angle θ between the central axis w of the intake valve 15 and the central axis n of the cylinder 11, and the exhaust valve 17 The angle θ between the central axis u of the cylinder 11 and the central axis n of the cylinder 11 is also the same, and is about 12° to about 14°.

As shown in FIGS. 1 and 2, the gas cylinder 29 is provided with a decompression valve 28, from which a supply pipe 25 is arranged, and the other end of the supply pipe 25 has an intake duct 18 in front of the intake port 12. It is configured to communicate with the inside of the orifice 18a. The LPG flows into the gas pipe 25 through the solenoid valve 27 and the pressure regulating valve 26 into the intake port 12, and finally is jetted by appropriately opening the throttle 20 by the throttle actuator 21. That is, the fuel supply device 2 includes the rottle 20, the throttle actuator 21, the gas pipe 25, the pressure regulating valve 26, the electromagnetic valve 27, the pressure reducing valve 28, and the gas cylinder 29.

As described above, as the fuel, liquefied petroleum gas (LPG), which is easily available, is filled in the gas cylinder 29, and is convenient for transportation, is used. The LPG has an advantage that it does not deteriorate like gasoline and light oil even when stored for a long period of time. Further, it has the advantages that the starting time is shorter and the emission of carbon dioxide and nitrogen oxides is smaller than that of the compression ignition diesel engine that uses light oil as fuel. In the figure, 44 is a radiator and 45 is a fan motor.

In daily life in FIG. 1, the engine battery 5 is converted into a low-voltage (for example, 12 V) direct current by the power conditioner 72 to perform charging work (see a broken line). As the engine battery 5, a 12V lead/dilute sulfuric acid battery for an automobile is often used. Further, in FIG. 1, the electric power of the total control unit (TCU) 61 is configured to be supplied from the low-voltage engine battery 5 like the engine control unit (ECU) 62.

In the state of FIG. 1, the state of the commercial power source (whether electricity is coming or not) is determined by the voltage applied to the total control unit (TCU) 61 from P1 through the fixed resistor 85, the main power source signal line 86, and the main power source signal line 86. Has been done. This is because the presence of the fixed resistor 85 makes it possible to determine whether the total control unit (TCU) 61 has a power failure with a weak current. If the main power supply (commercial power supply) is lost, this voltage becomes zero if there is a resistance in the total control unit (TCU) 61 and the voltage around this is monitored.

In the normal state, as shown in FIG. 1, the on/off switch 81 is closed, and the power from the main power source is output via P1 and P2 as indicated by the thick arrow. The on/off switch 81 has a function of turning on/off the circuit by a signal from the total control unit (TCU) 61. The switch may be a contactless switch using a transistor, which may be opened or closed electromagnetically.

Next, the operation description in an emergency will be described based on FIG. When it is detected that the commercial power source is lost due to some accident or the like, in FIG. 1, the on/off switch 81 is opened and the on/off switch 82 is closed by the operation of the total control unit (TCU) 61. The on/off state of each of the on/off switches 81 and 82 described above is instantaneous.

In the present invention, the blackout state occurs at the moment when the commercial power supply is lost. From this moment, the features of the present invention when the gas engine 1 generates power and continues to supply electric power for a long time will be described. Before that, the process until the gas engine 1 is started will be described. .. First, when the total control unit (TCU) 61 detects the loss of the commercial power source (main power source), the signal is transmitted from the total control unit (TCU) 61 to the engine control unit (ECU) 62.

A signal from the engine control unit (ECU) 62 causes the starter relay 42 to drive the starter motor 41 with the power source of the engine battery (12V) 5. At the same time, a signal from the engine control unit (ECU) 62 energizes and opens the electromagnetic valve 27 that shuts off the gas coming from the gas cylinder 29 (for LPG) through the mechanical decompression valve 28 that is normally used.

At the same time, the pressure adjusting valve 26 that adjusts the pressure of the fuel to almost atmospheric pressure is activated, and the fuel is ready to be supplied to the fuel supply device 2 of the gas engine 1. On the other hand, the supply of engine oil, which is indispensable for the operation of the gas engine 1, is circulated by the electric oil pump 46, and the cooling water is also circulated by the electric water pump 47.

When the starter motor 41 rotates, the gas engine 1 is cranked, and the fuel and air measured by the fuel supply device 2 are sucked by the negative pressure generated by the suction, compressed, ignited, and started. This startability is significantly superior to that of a diesel engine because of multipoint ignition (two spark plugs 13 are provided) and gas fuel.

When the gas engine 1 starts to reach the rated speed and power can be supplied from the AC generator 3 rotating at the same speed as the rated speed, the on/off switch is switched from the state of FIG. 1 to the state of FIG. Replace and close. Here, the rotation speed of the gas engine 1 is calculated by counting the top dead center signal for ignition timing control detected by the crank sensor 48. The opening of the throttle 20 of the fuel supply device 2 is adjusted by a signal from the engine control unit (ECU) 62 so that this becomes a predetermined rotation speed, for example, 2000 rpm.

The on/off switch 81 remains open, but the on/off switch 82 closes. The AC generator 3 is a normal three-phase AC of about 200V. The alternating current generated by this is adjusted by the alternating current→alternating current inverter 71 as alternating current of the same power and frequency as the main power source. This outputs from the closed on/off switch 82 and P2. Further, the power conditioner 72 is configured to convert the direct current to a low voltage to charge the engine battery 5 as well.

As described above, the electric power is blacked out from the moment when the commercial power source is lost due to some accident or the like, but the electric power is supplied from the AC generator 3 which rotates when the gas engine 1 of the present invention starts and reaches the rated speed. It only takes a short time (about 10 to about 40 seconds) before it can be supplied. Only such a short time (b hours in FIG. 3) is blacked out, and thereafter, the maximum amount of 2-3 days until the commercial power is restored should be covered by the power from the DC generator 3. This is an excellent invention.

Such supply power will be described with reference to a flow chart (see FIG. 3). The power from the commercial power source is represented by step a, the blackout time is represented by step b, and the power generated by the gas engine 1 is represented by step c. There is. In FIG. 3, blackout occurs twice and power is supplied from the gas engine 1 each time. Actually, the blackout time is about 10 to about 40 seconds. Only at this time, if a small UPS (uninterruptible power supply) is used to take measures against electronic equipment such as a PC, a large-capacity traffic signal is produced. The electric power supply of the gas engine 1 of the present invention can be sufficiently used as the power source of the store and the store.

When the temperature of the cooling water rises during the operation of the gas engine 1, the thermostat 43 opens and the cooling water circulates in the radiator 44. Further, when the water temperature rises, the fan motor 45 is energized to accelerate the heat radiation from the radiator 44 by the cooling air.

Next, fuel consumption and energy generated by the fuel consumption will be described. As an example, it is assumed that the gas cylinder 29 is a cylinder filled with 20 kg of propane C ₃ H ₈ . C ₃ H _{8 has} a molecular weight of 44, that is, 1 mol, and a standard state (0° C., 1 atm) of 22.4 liters has a mass of 44. On the other hand, the low calorific value of propane (hereinafter abbreviated as calorific value) in the standard state is 90.7 MJ/m ³ .

The mass of 1 m ³ of C ₃ H ₈ is 44 g×1000/22.4=1964 g. Therefore, a 20 kg cylinder is filled with (20 kg)/(1.964 kg/m ³ )=10.18 m ³ of propane in the standard state. The calorific value is 90.7MJ/m ³ ×10.18m ³ =923MJ (=923×10 ³ kJ). The electric energy that can be generated with this amount of heat is calculated, and it is examined whether 1kW can be supplied for 72 hours.

Stable thermal efficiency of 36% with a multi-point ignition engine that rotates at low speed with low friction loss
Is. The efficiency of the generator is 95%, and the conversion efficiency of the AC→AC inverter 71 is 93%. Further, assuming that the maximum output of 1 kW is continuously output from the P2 terminal, the energy consumed by the engine is (1 kJ/s)/(0.36×0.95×0.93)=3.144 kJ/s because the conversion is repeated twice. The time required to consume 923×10 ³ kJ is (923×10 ³ kJ)/(3.144 kJ/s)≈293600 s, that is, about 81.5 hours. It is possible to generate electricity for more than 81 hours with one 20kg cylinder, and it is possible to achieve the target of 72 hours with sufficient margin.

When the commercial power supply (main power supply) is restored, the total control unit (TCU) 61 recognizes it, opens the on/off switch 82, and closes the on/off switch 81, so that the power from the main power supply is supplied from P1. Supplied. Further, the engine control unit (ECU) 62 closes the electromagnetic valve 27 at the same time as stopping the engine to shut off the fuel. Then, the state returns to that of FIG.

It is assumed that the required electric output suddenly increases when the gas engine 1 is rotating at a rated speed with an output lower than a predetermined output. The engine speed decreases as the load increases. In order to recover this, the throttle of the fuel supply device 2 is opened by a signal from the engine control unit (ECU) 62, but it takes a short time but a certain amount of time to return to the predetermined rotation speed.

A small-sized engine with a small output capacity cannot counter this, and the output voltage of P2 may drop, or in extreme cases, the gas engine 1 may stop. In some cases, even a small engine may be prepared so that the gas engine itself can cope with a sudden increase in load. It is preferable to provide the flywheel 9 as such means.

As shown in FIGS. 6(A) and 6(B), the structure is composed of a thick outer peripheral portion 91 on the outer periphery, a thin disk portion 92, and a central boss portion 93. A mold spline 94 is provided. The flywheel 9 is fixed to the end portion of the crankshaft 19 of the gas engine 1 with fastening bolts 95.

A male spline 31 provided in the center of the AC generator 3 is fitted and fixed to a female spline 94 of the flywheel 9. It has a very simple structure. Further, as shown in FIG. 7A, a separate boss 96 having the female spline 94 may be provided. In this case, the flywheel 9 may be made of cast metal and the separate boss portion 96 may be made of steel to reinforce the spline attachment portion.

If the rotational moment of inertia Ip (unit: kgm ² ) is large, the downward rotation becomes slow. Immediately after the plunge, the engine speed is higher than the conventional type. If it is high, the number of times of suction is large, so that the time required to fill the inside of the cylinder 1 from the mixer becomes short. Then, the amount of the air-fuel mixture supplied during that time increases. A large amount of heat energy is generated, that is, it blows up strongly. The magnitude of the rotational moment of inertia Ip is 1.2kgm ² ~1.0kgm ² at engine 100Cc～300cc, is substantially the same size as the spark ignition engine of 4 cylinder 2000Cc～3500cc.

Further, FIG. 7(B) is a chart comparing the graph of the present invention provided with the flywheel 9 with the prior art. In the prior art, a sudden electric load was generated in the gas engine 1 in an emergency. At this time, the engine speed drops and the rise to the stalling limit falls, and the convergence (convergence) is slow, but the convergence (convergence) time due to the start-up of the present invention is about half, and it is possible to make the configuration extremely difficult to stall. There are advantages.

Each of the on/off switches 81 and 82 may be configured as an on/off relay switch. Mainly due to economics. Further, the table of FIG. 3 particularly shows the features of the present invention. That is, even if the power failure and the recovery are continued at a predetermined time interval (from 1 day to 3 days) as in the lowermost stage, although not shown, the engine battery 5 is charged even in the emergency. It depends. Such a configuration is the greatest advantage that has not existed in the past. For example, recently, the present invention can sufficiently cope with a case where the seismic intensity 7 continues twice within 24 hours due to the Kumamoto earthquake.

Generally, when the throttle 20 which is a known technique is appropriately opened, the LPG flows into the intake duct 18 from the orifice 18a, but it is as if tap water simply flows in, and the LPG is also gas. Air is in a situation where it is difficult to mix with each other, and as described above, this is due to the swirl S phenomenon in the cylinder 11 and the like described above, whereby air and LPG are mixed well and the gas engine 1 with good combustion efficiency is obtained. Can be provided.

The simplified emergency power supply device of the present invention is provided with a built-in audio output circuit. Specifically, as shown in FIGS. 8 and 9, a sound output unit 63 is incorporated inside the total control unit (TCU) 61. Further, when the device of the present invention is installed outdoors or the like, an audio output section 63 is provided at an appropriate place indoors away from the total control unit (TCU) 61 and incorporated in the TCU 61. The audio output unit 63 may be output from a computer or may have a built-in speaker.

The output of the built-in audio output circuit is connected to the engine battery 5 that is constantly charged in normal and emergency situations, and this output can be output as audio information under the control of the total control unit (TCU) 61. Is configured. First, even if there is a sudden power failure (blackout state) in an emergency, this device is an invention that enables power generation by the gas engine 1 in about 1 or 2 minutes. It provides a feeling.

In other words, it is configured to reassure the person who feels the greatest anxiety during a sudden power failure within a few minutes by voice output (preferably several times). In particular, the simplified emergency power that produces a great safety and security effect by the cooperation of the hardware configuration that lights up within a few minutes and the software configuration that maintains a sense of security even if the configuration is simple. A supply device can be provided.

As an emergency flowchart, as shown in FIG. 10, the gas engine 1 is ready for starting at the moment of a power failure (S1). That is, the engine is ready to start (S2). At the same time, the first sound is output from the sound output unit 63 inside the total control unit (TCU) 61 or indoors (S3). For example, "Please be relieved. The engine generator will operate."

Then, after several seconds, the preparation of the gas engine 1 is completed (S4). Simultaneously with the completion of this preparation, the voice output section 63 outputs the second voice (S5). For example, "The engine will be started." Then, the starter motor 41 is rotated to start on the gas engine 1 (S6).

This starts the gas engine 1 (S7). When the gas engine 1 is started and reaches the rated speed, the AC generator 3 is ready to supply electric power. Then, the voice output unit 63 outputs the third voice (S8). For example, "power is started." This state diagram is shown in FIG. Then, energization is started (S9).

In this way, the generator of the gas engine 1 supplies electric power in an emergency. Specifically, the total time of a series of operations from S1 to S9 power supply at the time of power failure is about 1 or 2 minutes. When a power failure occurs and the machine operates, there is no problem when the power failure is short, but if the power failure lasts for 10 hours, the fuel supply and the inspection are performed. Therefore, the system of the present invention is reset at this time as well.

Furthermore, according to the present invention, the presence of the emergency generator and the regular inspection information of this device are announced after a certain period of time even in normal time (when there is no power failure), for example, every six months or every other year. It is configured to give a sense of security. In this concrete configuration, the timing in time is controlled by the signal of the timer built in the total control unit (TCU) 61.

As a flowchart in the normal state, as shown in FIG. 10, after a predetermined time has passed (half a year or a year later) (S10), an announcement is made (S11). The most important item of this announcement is the notification of the existence of the emergency power supply device. For example, the output is "Emergency generator is installed in this building." Even with this, it can be sufficiently output that the building has a crisis management function.

In addition, regular inspection information can be output as a subsequent announcement. For example, the message "Regular inspection/maintenance is recommended at this time" is output. The importance of this information output is that it is possible to perform comprehensive crisis management by integrating the management information of the building owner with the user.
It should be noted that when the periodic inspection and maintenance are completed, the system of the present invention is reset, and the suit is started from zero time. The engine start-up inspection is always performed during regular inspections and maintenance, so it may be reset with the starter signal.

1... Gas engine, 11... Cylinder, 12... Cylinder head, 13... Spark plug,
15... Intake valve, 17... Exhaust valve, 12a... Flat spherical concave surface, 12a... Swelling portion,
2... Fuel supply device, 3... Alternator, 5... Engine battery,
61... Total control unit (TCU),
62... Engine control unit (ECU), 63... Voice output section,
81, 82... ON/OFF switch, 9... Flywheel.

Claims (7)

A small LPG gas engine with a displacement of 50cc to 500cc, an AC generator that generates power by starting the gas engine, an engine control unit having an engine battery, a plurality of on/off switches, and the on/off With a comprehensive control unit that controls the switch,
The cylinder of the gas engine is provided with two spark plugs, and the first spark plug, the intake valve, the second spark plug, and the exhaust valve are arranged around the circumference in a plan view of the cylinder. Further, the intake air from the intake valve is configured to flow in a tangential direction or a direction close to the tangent line when viewed in plan in the cylinder,
In normal times, the power supply side of the commercial power supply is turned on via the on/off switch, and the engine battery and the engine control unit are operated from the moment when the commercial power is lost due to some accident or the like. The gas engine configured as described above is started within about one or two minutes, and the AC power is generated by the AC generator by the starting force, and the AC power generated by the gas engine is supplied to the power supply side, and the commercial power source is used. continuing to feed by the power of only the gas engine to the time of return propane 20kg as the time both until return of the commercial power source is at least 72 hours of power 1KW a single cylinder of the already filled in only the gas engine It becomes possible to supply power with electricity,
A simple type emergency power supply device, characterized in that a charging action is provided to the engine battery regardless of whether the gas engine powers at the time of the accident or the normal power level. The simplified emergency power supply device according to claim 1, wherein the intake valve, the first spark plug, the exhaust valve, and the second spark plug of the gas engine are arranged in four equal parts. Simple type emergency power supply device characterized by. The simplified emergency power supply system according to claim 1 or 2, wherein the main flow of the air-fuel mixture that has flowed into the cylinder of the gas engine does not hit the ignition point of the spark plug directly but also flows in the vicinity thereof. A simple type emergency power supply device characterized by the following. The simplified emergency power supply apparatus according to claim 1, 2 or 3, wherein a flywheel is provided between the gas engine and the AC generator. .. The simplified emergency power supply device according to claim 4, wherein the flywheel and the AC generator are spline-coupled to each other. The simplified emergency power supply device according to claim 1, 2, 3, 4 or 5, wherein a plurality of the on/off switches are turned on/off by a signal from the general control unit, and the power is engine control. A simple type emergency power supply device, characterized in that power is supplied from the engine battery having a low voltage equivalent to that of a unit. The simplified emergency power supply apparatus according to claim 1, 2, 3, 4, 5 or 6, wherein the on/off switch is an on/off relay switch. ..

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