JPH028208B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention supplies liquid fuel into a vaporization chamber, vaporizes it, and premixes the vaporized gas with combustion air supplied by a blower. The present invention relates to a liquid fuel combustion device equipped with a burner device that burns a premixture.

(b) Prior art In conventional liquid fuel combustion devices of this type, as disclosed in, for example, Japanese Utility Model Application Publication No. 58-83620 and Japanese Utility Model Application Publication No. 57-40816, a blower device and a burner device are used. A control device was installed in the air passage between the fuel and the combustion air to adjust the amount of combustion air according to the amount of combustion.

In the conventional liquid fuel combustion device mentioned above, the adjustment means for adjusting the amount of combustion air is manufactured separately.
The structure is complicated, the number of parts is large, and assembly is very time-consuming and troublesome. Furthermore, since an installation space is required in the exterior case of the product to install the separately configured adjustment means, there have been problems such as the inability to construct the product compactly.

(c) Purpose of the Invention The present invention has been made in view of the above-mentioned problems, and aims to simplify the configuration of the adjustment means for adjusting the amount of combustion air by reducing the number of parts, and reduce the number of man-hours required when assembling the adjustment means. It is an object of the present invention to provide a compact liquid fuel combustion device by reducing the amount of space required for installing the adjusting means.

(d) Structure of the Invention In order to achieve the above-mentioned object, the present invention provides an air blower that includes at least a pair of fan case bodies, a blower fan disposed within these fan case bodies, and a motor that drives the blower fan. A ventilation hole is formed in one of the fan case bodies to connect the blower device and the burner device, a solenoid is attached to the other fan case body, and a solenoid is installed in both fan case bodies. A configuration is provided in which a valve is driven by the solenoid and opens and closes the vent hole.

(e) Examples Examples of the present invention will be described below based on the drawings.
FIG. 1 is a configuration diagram showing an embodiment of a liquid fuel combustion apparatus according to the present invention, in which 1 is a vaporization cylinder that forms a vaporization chamber 2 inside, and 3 is a vaporization cylinder that is connected to the upper part of the vaporization cylinder 2 and is connected to the upper part of the vaporization cylinder 2. A lead-out tube 5 is formed integrally with the upper end of the vaporizing tube 1 and has a throttle passage 6 in the center. The vaporizing tube 1, the outlet tube 3, the flame port member 4, and the aperture plate 5 constitute a burner device 7. A bulging portion 1' is integrally formed on the outer circumference of the lower end of the vaporization tube 1, and a sheathed heater 8 is wound and buried therein.
A fuel nozzle 9 and an air nozzle 10, which will be described later, are located at appropriate positions approximately in the center of the chamber 2 and facing into the vaporization chamber 2.

Reference numeral 11 supplies air as combustion air to the air nozzle 10 from an air supply pipe 13 via an air amount adjusting device 12 consisting of a solenoid damper, etc., to the vaporization chamber 2.
This is a blower device that pumps air into the interior. Reference numeral 14 denotes an electromagnetic pump whose lower end is immersed in the fuel in the fuel tank 15. The electromagnetic pump 14 pumps up the fuel in the fuel tank 15 and supplies the fuel through a supply pipe 16 having a fuel nozzle 9 at its tip. It is released into the vaporization chamber 2. In addition, the electromagnetic pump 14 operates 15 to 16 times during strong combustion so that the amount of fuel supplied is variably controlled by varying the oscillation frequency of the oscillator.
The oscillation frequency is set in two stages, 9 to 10 times/second during seconds and weak combustion. The supplied liquid fuel is atomized at the tip of the fuel nozzle 9, contacts the inner surface of the circumferential wall of the vaporization chamber 2, which has been preheated by the sheathed heater 8, together with the air flow discharged from the air nozzle 10, and is instantly vaporized. It is premixed with air in the vaporization chamber 2, passes through the throttle passage 6, and is ignited by the spark plug 15 on the flame port member 4 on the upper part of the outlet tube 3, forming a line-shaped blue combustion flame and combusting. do.

FIG. 2 is an exploded perspective view of the blower device 11. In the figure, 17 is the first fan case, with screw holes 19, 19... bored in the protrusions 18, 18... formed at appropriate locations on the outer periphery, and screw holes 19, 19... on the bottom surface. It is formed into a disk shape of synthetic resin such as ABS, with a circumferential side surface 20 forming a swirl chamber A on the side, and a through hole 22 for a motor shaft 21, which will be described later, in the center. On the upper surface side of the first fan case 17 are turbo fans 23 and 2, which will be described later.
Fixing the motor 25 that rotates the
It is fixed by screws 27, 27.... 28 is a second fan case, and screw holes 30, 30, . . . are formed in protrusions 29, 29, .
A vortex chamber wall portion 32 is provided with an opening 31 in the center of the vortex chamber A through which the motor shaft 21 passes.
and the discharge passage wall portion 33 of the discharge passage B to be described later are ABS.
It is integrally formed from synthetic resin such as. Further, a mounting opening 35 for mounting a solenoid body 34, which will be described later, is bored at a suitable position at the tip of the discharge passage wall portion 33. Further, on the upper surface side of the swirl chamber wall portion 32, an appropriate number of guide plates 36, 36, .

Reference numeral 37 designates a third fan case, which forms a swirl chamber wall 38 that forms the swirl chamber A' and another discharge passage wall 39 that forms the discharge passage B that guides the swirl. A small hole 40 for weak combustion and a vent hole 41 for strong combustion are provided at appropriate positions at the tip of the discharge passage wall 39, and a small hole 40 for weak combustion and a vent hole 41 for strong combustion are provided at a certain distance from each other. A hollow cylindrical discharge tube 42 is integrally formed to protrude so as to surround the outer circumference of the discharge tube 41,
One end of the air supply pipe 13 is connected to the discharge tube 42 by fitting, and the third fan case 37 is made of synthetic resin such as ABS.

Reference numerals 23 and 24 designate turbo fans formed into a disk shape with mounting holes 43 and 44 opened in the center, and a suitable number of blade plates 45...46... bent in a substantially arched shape on the surface.
It is integrally molded from synthetic resin such as ABS. or,
The turbo fans 23 and 24 are arranged in swirl chambers A and A' formed within the spaces between the first fan case 17 and the second fan case 28 and the second fan case 28 and the third fan case 37, respectively. established,
They are mounted on the motor shaft 21 via support pipes 47 and 48, respectively.

Next, the air amount adjusting device 12 will be explained. 3
Reference numeral 4 denotes a solenoid body that operates the operating rod 49, and an E-ring 51 is fixed to a groove 50 formed at a suitable position on the outer circumferential surface of the operating rod 49, and the solenoid body 4 operates the operating rod 49.
Insert the operating rod 49 from above into the E-ring 5.
1 is brought into contact with the periphery of the mounting opening 35, and an operating rod 49 is supported at the mounting opening 35 portion so as to be able to move up and down.
Further, the solenoid body 34 is fixed to the periphery of the mounting opening 35 of the second fan case 28 by mounting pieces 52, 52. 53 has a packing 54 on the outer periphery.
It is a disc-shaped on-off valve that is fitted and mounted on the operating rod 4.
It is fixed to the lower end of 9 with a stopper 55.
Further, the on-off valve 53 is provided with an annular rib 53', which prevents the coil spring 56 that biases the on-off valve 53 from moving in the lateral direction.

Next, a method of assembling the air blower 11 described above will be explained. First, the motor 25 is attached to the first fan case 17 via the fixing fittings 26, 26, and the peripheral edge of the attachment port 43 of one turbo fan 23 is attached to the support tube 47 that is attached to the motor shaft 21 of the motor 25. After making contact, attach the other support pipe 48 to the support pipe 47.
Next, the second fan case 28 on which the solenoid 34 etc. have been installed in advance is superimposed on the first fan case 17, and the peripheral edge of the mounting port 44 of the other turbo fan 24 is fitted to the support pipe 48. After the motor shaft 2 is brought into contact with the motor shaft 2 through the washer 57,
Both turbo fans 23 and 24 can be fixed to the motor shaft 21 by screwing a nut 58 onto the tip of the turbo fan 23, 24. After that, the third fan case 3 is attached to the second fan case 28.
7 and then tighten the first, second and third fan cases 17, 28, 37 with screws 59, 59, . . . to complete the assembly.

Next, the operation of the present invention described above will be explained below. First, the vaporizing cylinder 1 is heated by the sheathed heater 8 to approximately
When heated to around 200°C to 300°C, a temperature detector (not shown) is activated, the electromagnetic pump 14 is driven, and the liquid fuel in the fuel tank 15 is supplied to the vaporization chamber from the fuel nozzle 9 via the supply pipe 16. At the same time, external air flows into the through hole 22 of the first fan case 17 due to the rotation of the turbo fans 23 and 24, and the air, which is turned into a vortex flow with a small pressure by the one turbo fan 23, flows through the guide plate 36. , 36...
The air is sucked into the other turbo fan 24 from the opening 31 of the fan case 28, and the air is turned into a high-pressure vortex flow.The air amount is regulated by an air amount regulating device 12, which will be described later, and then flows from the air nozzle 10 into the vaporization chamber 2. be pumped. At this time, the fuel discharged from the fuel nozzle 9 becomes fine particles and is instantaneously vaporized in the vaporization chamber 2, and the vaporized gas is premixed in the vaporization chamber 2 by the air pumped from the air nozzle 9, and the aperture plate It passes through the throttle passage 6 of No. 5 and burns on the flame port member 4 disposed at the upper part of the outlet tube 3.

Next, the combustion of the burner device 7 described above is set to high and low.
The case where the height is varied in stages will be explained based on FIGS. 3 and 4. At the time of ignition, in order to ensure ignition, combustion is set to start in a strong combustion state, and the above-mentioned electromagnetic pump 14 is set to send oil at a set oil flow rate of 3 to 4 c.c. ./min (approximately 4.5cm ³ /min)
In order to supply gas into the vaporization chamber 2, the on-off valve 53 opens the ventilation hole 41 as shown in FIG. 3 by driving the solenoid body 34.
The high-pressure air supplied from 4 passes through the discharge path B, and the air discharged from the small hole 40 and the air discharged from the vent hole 41 are combined in the discharge pipe 42 to increase the amount of air for strong combustion. Since the air can be reliably fed under pressure from the air nozzle 10 into the vaporization chamber 2 via the air supply pipe 13, stable and strong combustion can be performed.

In addition, when switching to weak combustion using a room temperature thermostat or a manual changeover switch, the electromagnetic pump 14 operates at a set oil supply amount of 2 to 2.5 at the time of weak combustion.
At the same time as switching to cc/min, the oil supply amount is 2 to 2.5
In order to supply the amount of air (approximately 2.6 cm ³ /min) necessary to completely burn out the cc/min, the solenoid body 34 is turned off and the on-off valve 53 is turned off as shown in FIG. The ventilation hole 41 is closed. Therefore, the combustion air during weak combustion is only the air flowing in from the small hole 40, and the amount of air ( Approximately 2.6 cm ³ /min) can be reliably pumped from the air nozzle 10 into the vaporization chamber 2 via the air supply pipe 13, and stable weak combustion can be performed. That is, in the present invention, the solenoid body 34 for driving the on-off valve 53 is mounted on the discharge passage wall part 33 of the second fan case 28, and the on-off valve 53 is mounted on the discharge passage wall part 39 of the third fan case 37.
Ventilation holes 41 which are opened and closed at
The solenoid body is installed around 1, and during weak combustion, the amount of combustion air discharged from the small hole 40 is used to cause combustion, and during strong combustion, the amount of combustion air that is insufficient to flow in from the small hole 40 is supplied to the solenoid body. 34
The air amount adjustment device 12 for the combustion air which is forcedly fed into the vaporization chamber 2 through the vent hole 41 which is opened by driving the air blower 11 is formed integrally with the blower device 11. Air amount adjustment device 12
Since there is no need to manufacture the fan separately from the blower 11, the number of parts can be reduced. Further, since the installation space for installing the air amount adjusting device 12 as in the conventional case is no longer required, a compact liquid fuel combustion device can be manufactured.

(F) Effects of the Invention Since the liquid fuel combustion apparatus of the present invention is constructed as described above, it exhibits the following effects.

Since the air amount adjusting device and the blowing device can be integrated, the number of parts and man-hours can be reduced, and workability can be improved.

This eliminates the need for installation space for air conditioning equipment, which was previously required, and allows for shorter air supply pipes and other air channels, making the product more compact.

Since it has a simple configuration, it has great effects such as being able to provide a liquid fuel combustion device that is very easy to use because it has good serviceability and eliminates the occurrence of defects.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of the present invention, Fig. 2 is an exploded perspective view of the air blower shown in Fig. 1, Fig. 3 is an enlarged sectional view of the main part of the air amount adjustment device during strong combustion, and Fig. 4 is a weak FIG. 2 is an enlarged cross-sectional view of a main part of an air amount adjusting device during combustion. 2... Vaporization chamber, 7... Burner device, 11... Air blower, 17... First fan case, 23, 24... Turbo fan (blow fan), 25... Motor, 28...
Second fan case, 34... Solenoid body, 37...
Third fan case, 41...Vent, 53...Opening/closing valve.

Claims (1)

[Claims] 1. A burner device that supplies and vaporizes liquid fuel into a vaporization chamber, premixes the vaporized gas with combustion air supplied by a blower, and burns the premixed mixture. In the liquid fuel combustion device, the blower device includes at least a pair of fan case bodies, a blower fan disposed within the fan case bodies,
A motor for driving the blower fan is provided, a ventilation hole is formed in one of the fan case bodies to connect the blower device and the burner device, and a solenoid is attached to the other fan case body, and A liquid fuel combustion device characterized in that a valve that is driven by the solenoid and opens and closes the vent hole is provided in both fan case bodies. 2. The liquid fuel combustion device according to claim 1, wherein a small ventilation hole for weak combustion is provided in one fan case body adjacent to the ventilation hole.