JPS6073207A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To decrease manufacturing process and to heighten workability, as well as to decrease the number of parts, by unitarily assembling an air rate controlling device in a fan mechanism, in a liquid fuel combustion apparatus. CONSTITUTION:A motor 25 is fixed to the primary fan case 17 with metal fittings 26, 26. The edge of a fitting hole 43 of the primary turbo-fan 23 is abutted against a holder pipe 47 which is fixed to the motor shaft 21, then another holder pipe 48 is fitted to the holder pipe 47, and then the secondary fan case 28, in which a solenoid 34 and other parts are previously assembled, is fitted to the primary fan case 17. Next the edge of a fitting hole 44 of the secondary turbo fan 24 is abutted against the afore-said holder pipe 48, and a nut 58 is screwed in the end of said motor shaft 21, with a washer 57 interposed between them. Both turbo-fans 23 and 24 are fitted to the motor shaft 21 by taking these procedures. After that the tertiary fan case 37 is put on bottom of the secondary fan case 28. Assembling of a fan mechanism with an air controlling device is completed by tightening the primary, the secondary, and the tertiary fan cases 17, 28, and 37 with screws 59, 59....

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. Regarding a liquid fuel combustion device equipped with a burner device for burning a premixture, 1-b.

(B) Prior art In conventional liquid fuel combustion devices of this type, in order to switch the combustion amount in multiple stages, an adjusting means for adjusting the combustion air end while being supplied from the blower device to the burner device is installed in another part. It had a complicated configuration to adjust the amount of combustion air.

In conventional liquid fuel combustion devices, the adjustment means for adjusting the amount of combustion air are manufactured separately, resulting in a complicated configuration and a large number of parts. It was very 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 was developed in view of the above-mentioned problems, and it simplifies the configuration by reducing the number of parts of the adjustment means for adjusting the amount of combustion air, and reduces the number of man-hours when assembling the adjustment means. reduction of
Another object of the present invention is to provide a compact liquid fuel combustion device by reducing the darkness and space of the adjustment means.

B) Structure of the Invention In order to achieve the above-mentioned objects, the present invention provides at least a pair of fan case bodies made of synthetic resin, a blower fan disposed inside these fan case bodies, and a drive fan for driving the blower fan. A vent opening is formed in one of the fan case bodies to be opened and closed by an on-off valve, and the other fan case body is equipped with a solenoid for driving the on-off valve. It is something.

(e) Examples Embodiments of the present invention will be described below with reference to the drawings.

Figure m1 is a configuration diagram showing an embodiment of the liquid fuel combustion device 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 forms a vaporization chamber (2) inside. A lead-out tube (5) is connected to the upper part, and the upper part is expanded in a shape that widens toward the end, and the upper opening edge is equipped with an oblong flame port member (4).
) is a throttle plate that is integrally formed at the upper end of the vaporization tube (1) and has a throttle passage (6) in the center;
1. A burner device (7) is composed of an outlet tube (3), a flame port member (4), and a diaphragm plate (5). 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 α0), which will be described later, are located at approximately central locations facing into the vaporization chamber (2).

(111 is a solenoid damper etc. that sends air as combustion air to the air nozzle (10) from the air supply pipe (13) via the air storage and adjustment device (12), and into the vaporization chamber (2). (14) is an electromagnetic pump whose lower end is immersed in the fuel in the fuel tank (15);
There is a fuel nozzle (9) at the tip to pump up the fuel inside 9.
into the vaporization chamber (2) via a supply pipe 018) forming a . In addition, the operation of the electromagnetic pump 04) is performed in two stages: 15 to 16% during strong twist firing and 9 to 01% during weak combustion, so as to variably control the amount of fuel supplied by varying the oscillation frequency of the oscillator. Set the oscillation frequency (・ru).

The supplied liquid fuel is atomized at the tip of the fuel nozzle (9), and the inner surface of the peripheral wall of the vaporization chamber (2) is heated in advance by the sheathed heater (8) together with the air flow discharged from the air nozzle (00). It vaporizes instantly on contact with the vaporizing chamber (
2), passes through the throttle passage (6), and is placed on the flame port member (4) at the top of the outlet tube (3).
1, it is ignited to form a line-shaped blue flame and burns.

FIG. 2 is an exploded perspective view of the blower device (Ill).
7) is the first fan case, and there are screw holes (19Q, 'l) in the protrusion t18) (In...) formed at the appropriate location on the outer periphery.
- is bored and a circumferential side part (20) that forms a southern vortex is formed on the lower surface side, and a motor shaft (to be described later) is provided in the center.
It is formed into a disk shape from synthetic resin such as ABS with a 2t through hole (22).Turbo fans (23) and (24), which will be described later, are rotated on the upper surface side of the first fan case 0n. Fix the motor (251) with the screw (27) (2η) through the fixing metal fitting (circle 0).

(28) is the second fan case, with screw holes (3 hats...) drilled in the protrusion (29) (2!l...) formed at the appropriate location on the outer periphery, and in the center of the south vortex. A vortex chamber wall portion (32) having an opening (31) through which the motor shaft Cυ passes and a discharge passage wall portion (3) of a discharge passage (B) to be described later are integrally formed of synthetic resin such as ABS. .Furthermore, the discharge passage wall portion (33
) is provided with three mounting holes (3) at the appropriate locations at the tips of the solenoid bodies (34), which will be described later.Furthermore, on the upper surface side of the swirl chamber wall G, there are holes bent in a substantially arched shape. An appropriate number of guide plates □□□) (3G>... are attached to the second fan case (2
8).

C37) is the third fan casing, which forms the swirl chamber wall (end) that forms the south vortex and the other discharge passage wall (3!1) that forms the discharge passage (B) that guides the vortex. At the same time, a small hole for weak combustion and a vent hole for strong twist firing are opened at appropriate positions at the tip of the discharge passage wall part 0, with a gap between them, and the discharge passage wall part ( 39) A hollow cylindrical discharge cylinder (42) is integrally formed on the lower surface side so as to surround the outer circumference of the small hole (40) and the ventilation hole (41), and this discharge cylinder (42) has a The third fan case Gn is configured to connect one end of the air supply pipe 03) to the other by fitting.
It is made of synthetic resin such as BS.

(C) (Foundation) is a turbo fan formed in the shape of a disk with a mounting opening (4) (I4) in the center, and an appropriate number of blade plates (4...・(46)... is A
It is integrally molded from synthetic resin such as BS. Further, the turbo fans (23) and (24) generate vortices that are formed within the space between the first fan case αη and the second fan case (the second fan case and the third fan case 07). It is disposed in a chamber (Al(A)) and is attached to the motor shaft 01 via support pipes (47) and (41), respectively.

Next, the air amount adjusting device (12) will be explained. (34
) is a solenoid body that operates the operating rod (49), and E
While fixing the ring Gυ, bring the mounting port (the E-ring 6 by inserting the operating rod (49) into 39 from above) into contact with the periphery of the mounting port (351), and install the operating rod (49). The solenoid body (34) is fixed to the periphery of the mounting port C35+ of the second fan case (281) by the mounting piece 5acia. Fit and install the PACKIN (Incorporated).It is a disc-shaped opening/closing valve and is fixed to the lower end of the operating rod (491) with a stopper I54.

Further, an annular rib 6■ is formed on the opening/closing valve I5■, and the annular rib 61) prevents the lateral movement of the coil spring (56) that biases the opening/closing valve (53). It is something.

Next, a method of assembling the above-mentioned blower device will be explained. First, attach the fixing fittings (261 (2) to the first fan case (1η).
Mount the motor (25) through the fill, and bring the peripheral edge of the mounting port of one turbo fan (23) into contact with the support tube (47) that is pivotally attached to the motor shaft (2I). After that, fit another support pipe (48) to the support pipe (4η), and then superpose the second fan case (28) to which the solenoid C34 etc. have been attached in advance to the first fan case (171). , and after bringing the peripheral edge of the mounting port (44) of another turbo fan (24) into contact with the support pipe (48), attach the motor shaft (nano at the tip of 2υ) via washer 〇η. If you screw it on, both turbo fans (2
3) (24) can be fixed to the motor shaft (21). After that, the third fan case (37
), and the assembly is completed by overlapping the first, second, and third fan cases 08) f37) with the screws ff191....

Next, the operation of the present invention described above will be explained below.
A temperature detector (not shown) activates to heat the fuel tank to around 300°C, and the electromagnetic pump θa is activated, causing the fuel tank to reach 0.
The liquid fuel in the tank is supplied to the fuel nozzle (9) through the supply pipe (16).
) into the vaporization chamber (2), and the rotation of the turbo fan (23) CI4) causes external air to flow in from the through hole (2) in the first fan case, and is The air that has become a vortex of small pressure flows through the guide plate (
36) f36) ... sucks the other turbo fan U4)K from the second fan case (opening landmark of 2 issues),
Therefore, the air that has become a high-pressure vortex is regulated by an air volume regulating device (12), which will be described later, and is passed through an air nozzle (10).
) into the vaporization chamber (2). At this time, the fuel discharged from the fuel nozzle (9) becomes fine particles in the vaporization chamber (
2), and the vaporized gas is passed through the air nozzle (9).
) is premixed in the vaporization chamber (2) by air pumped from the air outlet tube (3) and passes through the throttle passage (6) of the throttle plate (5).
) Combustion is carried out on the burner port member (4) disposed on the upper part of the burner.

Next, a case where the combustion of the burner device (7) described above is varied in two stages, strong and weak, 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.
In order to supply the amount of air (approximately 4.5 i/min) necessary to completely burn out 4 cc 7 minutes into the vaporization chamber (2), the on-off valve 53) is activated by the solenoid body (2). As shown in Figure 3, since the vent hole (4υ) is opened, the high pressure air supplied from the turbo fan (231 (241) passes through the discharge passage (B) and the air discharged from the small hole (4 (ll)). The air discharged from the ventilation hole (41) joins in the discharge tube (421) to form an air volume for strong twist firing, and is then transferred from the air nozzle 00 through the air supply pipe (13) to the vaporization chamber (2).
), stable and strong combustion can be achieved. - In addition, when switching to weak combustion using a room temperature thermostat or a manual changeover switch, the box and magnetic pump ring will switch to 2 to 2.5 cc 7 minutes, which is the set oil delivery amount for weak combustion, and at the same time, Air t1 (approximately 2.6.I
7 minutes), the solenoid body (34) is turned OFF as shown in Fig. 4, and the on-off valve 63) is turned OFF.
The vent hole (41) is closed. Therefore, the combustion air during weak combustion is only the air flowing in from the small hole (4G),
2 to 2, which is the weak combustion oil supply amount of the electromagnetic pump (14);
The amount of air required to completely burn out 5cc/min (
Approximately 2.6 ctd 1 minute) can be reliably pumped from the air nozzle 00) 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 discharge passage wall portion (33
) solenoid body (34) that drives the on-off valve (53)
At the same time, vent holes (41) which are opened and closed by the on-off valve (53) are formed facing each other in the discharge passage wall portion 439) of the third fan case (37), and a small vent hole (41) set for weak combustion is installed. A hole (40) is provided around the ventilation hole (41), and during weak combustion, the amount of combustion air discharged from the small hole (40) is used for combustion, and during strong twist firing, the amount of combustion air that flows in from the small hole device is used. The amount of z during combustion, which is insufficient when
The air volume adjustment device (12+) for the combustion air that is force-fed from the combustion air I) into the vaporization chamber (2) is formed integrally with the air blower 0υ.
) need to be manufactured separately from the blower device aυ, so the number of parts can be reduced. Furthermore, since the installation space required for the conventional air amount adjustment device (12+) 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 configured as described above, it has the following effects.

■ Since the air volume control device and the blower device can be configured as one unit, the number of parts can be reduced, and the number of man-hours required for joint development can be reduced, resulting in improved work efficiency.

■ The product can be made more compact because the installation space for the air volume control device that was previously required is no longer required.

(2) Since it has a simple structure, it has excellent serviceability and eliminates the occurrence of defects, so it has great effects such as being able to provide a liquid fuel combustion device that is very easy to use.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of the present invention, Fig. 2 is an exploded perspective view of the blower device shown in Fig. 1, Fig. 3 is an enlarged cross-sectional view of the main part of the air adjustment device during hard twist firing, and Fig. 4 is Air amount adjustment device ξ during weak combustion
FIG. (2)... vaporization chamber, (7)... burner device, (
11)... Air blower W, (In... first fan case, (23) (211... turbo fan (?s wind fan), (251... motor, (28)... th 2 fan case, (34)... solenoid body, (3...
・Third fan case, (41)...Vent, 63)
...Open/close valve.

Claims (2)

[Claims] (1) A liquid fuel combustion device equipped with a burner device that supplies liquid fuel into a vaporization chamber, vaporizes it, premixes the vaporized gas with combustion air supplied by a blower, and combusts the premixed mixture. In the air blowing device, the blower device includes at least a pair of fan case bodies made of synthetic resin, a blower fan disposed within these fan case bodies, and a motor for driving the blower fan, and the fan A liquid fuel combustion device characterized in that one of the fan case bodies has a vent that is opened and closed by an on-off valve, and the other fan case body is equipped with a solenoid that drives the on-off valve. (2) The liquid fuel combustion device according to claim 1, characterized in that a small ventilation hole for weak combustion is provided in one fan case body adjacent to the ventilation hole.