JPS58156105A - Pulse combustion device - Google Patents

Abstract

PURPOSE:To enable to widen a combustion range without enlarging a fan, by a method wherein a supercharger is mounted, and a pressure los of combustion gas in an exhaust pipe is compensated. CONSTITUTION:Air sucked through an air feed pipe 11 through the working of a fan 13 is mixed with fuel fed through an electromagnetic valve 15, the air-fuel mixture is ignited by means of spark produced by an igniting electrode 16 to perform a pulse combustion. A high-temperature high-pressure combustion gas produced as a result of combustion at a combustion part 14 is fed to an exhaust pipe 17. A heat exchanger 18 and a supercharger 19 are located in order in the middle of the exhaust pipe 17. The supercharger 19 has a propeller 19a therein which can turn with the aid of a pressure of combustion gas. This permits widening of a combustion range without enlarging a fan.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention mixes inhaled air and fuel, causes combustion, and directly utilizes the heat of the combustion reaction. Regarding the Luss burner.

[Technical background of the invention]

In recent years, awareness of energy saving not only in industry but also in home appliances has become extremely high, and there is a growing demand for higher efficiency for household heat sources.

To cope with such requests and burn / Mother Ruszoe.

A Nollus combustion machine has been developed and put into practical use, which applies combustion ash and directly utilizes combustion ash and heat response.

FIG. 1 shows an example of such a 14 Lus combustion machine. In Fig. 1, 1 is a startup fan, and the air (combustion air) taken in by this 7-amp 1 is supplied to the combustion section 3 through the supply air silencer 2, where it is mixed with fuel (gas). Norrus is burned. The high-temperature, high-pressure combustion gas thus obtained is supplied to a heat exchanger 4, where heat is removed from the combustion gas, and the gas is then discharged through an exhaust muffler 5.

[Problems with background technology]

By the way, in such a pulse combustion machine, the silencer 2.5, the heat exchanger 4, etc. become a large flow resistance,
The disadvantage is that it causes a very large pressure drop and narrows the combustion range. (Here, the combustion range refers to the range of appropriate combustion conditions that can be obtained by changing the amount of combustion air when the amount of fuel supplied is constant.) Therefore, the starting fan is installed to counter the flow resistance. It is conceivable to replace it with a larger 40, but this would create a new problem of increasing the size of the system.

[Purpose of the invention]

This invention was made in view of the above circumstances,
The purpose is to provide an excellent nine-arm combustion machine that can expand the combustion range without increasing the size of the fan, and also allows for miniaturization of the system.

[Approximately 6 tatami mats of the invention] This invention provides a supercharger that can be operated by exhaust pressure in the middle of the exhaust pipe, and connects the drive shaft of this supercharger and the drive shaft of the fan in the air supply pipe with a drive motor. The drive motor drives the fan and the supercharger, and the exhaust pressure of the supercharger operates the fan and the exhaust pipe. Se L swim [mo bill, 粍 import, tableware - yohi uniformly included bulk wafer and set up, 0 grade pe vP 4 person instrument, c law 5 ^ 翫 roaring way - I book 4 Hi, L 6 Ω. [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Fig. 2, 11 is an air supply pipe, and this air supply pipe 1
A supply air muffler 12 is provided at the air supply end of . Also,'
A starting fan 13 is disposed in the middle of the air supply pipe 1. ζThus, the air sucked in through the air supply pipe 11 by the F/13 is supplied to the combustion section 14. This combustion section 14
mixes air that is drawn in and fuel (7!/s) supplied from a fuel supply source (not shown) through a solenoid valve 15, and ignites it with a spark generated at an ignition electrode 16. It is something that burns the arm and arm. High-temperature, high-pressure combustion gas obtained by combustion in the combustion section 140 is supplied to the exhaust pipe 11. A heat exchanger 18 and a supercharger 19 are sequentially arranged in the middle of the exhaust pipe 17. Here, heat exchanger 1
Reference numeral 8 denotes a cylinder that applies heat of the combustion gas obtained from the combustion section 14 to the load. The supercharger 19 has a propeller 19a inside.
The deroller 191 can be rotated by the pressure of combustion gas. Furthermore, an exhaust muffler 20 is provided at the exhaust end of the exhaust pipe 17. This exhaust silencer 20 is disposed inside the supply air silencer 12 and is coaxially integrated with the intake air silencer 12. Further, the arrangement part of the fan 13 and the arrangement part of the supercharger 19 are adjacent to each other in a substantially parallel state, and the drive shaft of the fan 13 and the drive shaft of the supercharger 19 are connected to the rotation axis of the drive motor 21. connected via.

Note that 31 is a wind pressure switch that responds to the pressure of the air being sucked in, 32 is an ignition transformer, 33 is a flame detection electrode that detects flame in the combustion section 14, and 34 is a flame detector.

In FIG. 3, the AC power supply 40 includes an operation switch 41,
The drive motor 21 is connected via the fuse 42, the timer contact 45*, and the output contact 54m of the flame detector 34. A first timer 43 is connected to the series circuit between the output contacts 34& and the motor 21 via the wind pressure switch 31. This first timer 43 is for ensuring a prepurge time for the combustion section 14.

Therefore, the first timer 43 has its timer contacts 43&
via the relay 44, the output contact Job, and the ignition transformer 32 via the relay contact 44m, the relay contact 44
The electromagnetic valves 15 are connected in parallel via b. The flame detector 34 is connected in parallel to the electromagnetic valve 15, and a second timer 45 is connected in parallel to the solenoid valve 15 via the output contact 34@. This second timer 45 functions as a safety timer upon ignition.

Next, the operation in the above configuration will be explained. Now, when the operation switch 41 is turned on, the motor 21 operates, the fan 13 rotates, and the supercharger 19 rotates.

When the fan 13 rotates, air is sucked into the air supply pipe 11 through the air supply muffler 12 in the direction of the arrow shown in the figure, and is supplied to the combustion section 14 . In this way, air is sent to the combustion section 14, and the air inside the combustion section 14 is discharged by the operation of the supercharger 19, and the incomplete combustion remaining in the combustion section 14 is discharged (green, etc.). i+)) is performed.

At this time, when the pressure of the air being sucked exceeds a certain value, the wind pressure switch 31 is turned on and the first timer 4J is activated. In this way, when the first timer 43 measures a certain period of time, the timer contact 43& is closed and the relay 44 is activated, and the closing of the contact 44& energizes the ignition transformer 32, and the closing of the contact 44b. Solenoid valve 15. Flame detector 34. The second timers 45 are activated. Fuel (gas) is supplied to the combustion section 14 by opening the electromagnetic valve 15, and this fuel is mixed with air taken in through the air supply pipe 11. This mixed gas is ignited by a spark from the ignition electrode 16, thereby starting combustion.

- High-temperature, high-pressure combustion gas obtained by dulse combustion is supplied to the heat exchanger 18 through the exhaust pipe 77, where heat is removed and then exhausted to the outside through the supercharger J9 and the exhaust muffler 20.

In this case, since the supercharger 1g is driven by the motor 211/C, combustion is not affected by the presence of large flow resistance (heat exchanger 18, exhaust silencer 20, etc.) in the exhaust path. Gas can be expelled vigorously. This can compensate for the pressure loss of combustion gas. When combustion starts, the combustion flame is detected by the flame detector 34, and the contact 34a is detected.

- Then, the operation of the motor 21 is stopped, and the motor 34b
, 34c are closed. When the contact 34m opens 21, the driving of the fan 13 and the supercharger 19 is completed. However, in this case, the nozzle 19 of the supercharger 19 continues to rotate due to the pressure of the combustion gas passing through the exhaust pipe 17, and its function as the supercharger 19 is not lost. In addition, the rotation of the motor (1ga) is transmitted to the fan 13 via the rotating shaft of the motor 21, and the fan 130 rotations are also continued. Stable air suction is achieved by the training action.

Therefore, the wind pressure switch S1 also maintains the on state. On the other hand, by opening the contact 34b, the current supply path to the ignition transformer 32 is cut off, and the ignition operation ends. Further, by opening the contact 45, the operation of the second timer 45 is also stopped.

By the way, when the flame detector 34 does not detect a combustion flame, the second timer 45 is in an operating state;
5 counts a certain period of time, the timer contact 45& is opened and all operations are completed. That is, this is the combustion section 14
This is to avoid the danger of the ignition not completing for some reason.

Therefore, by providing the supercharger 19, the exhaust pipe 1
7 can compensate for the pressure loss of the combustion gas,
Therefore, air can be efficiently sucked into the combustion section 14, and the combustion range can be expanded without increasing the size of the fan 13. Furthermore, when the combustion section 14 enters the normal combustion state,
The operation of the motor 21 that drives the fan 13 and the supercharger 19 is stopped, the supercharger 19 is operated by the pressure of the combustion gas, and the rotation of the propeller 19a in the supercharger 1911C is transmitted to the fan 13. Since the fan 13 continues to operate, power consumption can be reduced. Furthermore, since the supply air muffler 12 and the exhaust muffler 20 are arranged coaxially and integrated, the system can be made smaller.

In the above embodiment, the supercharger 19 is installed after the heat exchanger 18.
Although the supercharger 19 is disposed in front of the heat exchanger 18, the supercharger 19 may be disposed near the exhaust port of the combustion section 14. In addition, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide an excellent pulse combustion machine in which the combustion range can be expanded without increasing the size of the fan, and the system can also be made smaller.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the chamber configuration of an example of a conventional main burner, Fig. 2 is an overall configuration diagram of an embodiment of the present invention, and Fig. 3 is an embodiment of the same. It is a block diagram of the control circuit in . 11... Air supply pipe, 12... Air supply silencer, 13...
Fan, 14... Combustion section, 17... Exhaust pipe, 18.
...Heat exchanger, 19...Supercharger, 19a...Propeller, 20...Exhaust silencer.

Claims (1)

[Claims] An air supply pipe, an air supply silencer provided at the air supply end of the air supply pipe, a fan disposed in the middle of the air supply pipe, and air and fuel sucked by the fan through the front distribution trachea. a combustion section that mixes the mixture and combusts it, an exhaust pipe that discharges the combustion gas from this combustion section, a heat exchanger disposed in the middle of this exhaust pipe, and a middle part of the exhaust pipe. a supercharger that is disposed in and can be operated at exhaust pressure; a drive motor that connects a drive shaft of the supercharger and a drive shaft of the fan;
A combustion engine characterized by comprising an exhaust silencer provided at the exhaust end of the air distribution pipe and coaxially integrated with the supply air silencer.