JPS6229802Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blower mechanism suitable for a combustion device, particularly a type of combustion device that vaporizes and burns kerosene.

BACKGROUND ART Combustion devices are conventionally known in which liquid fuel is supplied by a pump, vaporized, and then sent to a burner section by ventilation from an air blower for combustion. Further, this combustion device is generally equipped with a blowing mechanism so that the combustion amount can be adjusted in two or more stages.

However, with such a blowing mechanism, especially when switching the combustion amount from small combustion to large combustion, there is a delay in switching due to the way the pump oil amount changeover switch is assembled, resulting in a delay in oil supply. For this reason, the amount of supplied oil may be set to be smaller than the amount of oil supplied corresponding to the amount of supplied air. In this case, if oil supply is not taken into account, the amount of supplied air will be excessive as shown in FIG. 9, resulting in a temporary excess air condition, causing lift combustion and sometimes blowing out. Of course, if the switch is assembled properly and the pump oil volume changeover switch and the damper that changes the air volume are in sync, there will be no problem, and the amount of air supplied will be equal to the amount of oil supplied by the pump. If it is set lower, red-flame combustion will occur, but it will not make it impossible to continue combustion.

By the way, in a combustion device that uses this type of cam to switch the combustion amount, an electrical compensation device is installed to compensate for the imbalance between the amount of supplied oil and the amount of supplied air as described above. The blowout phenomenon is prevented by balancing the amount of air supplied and the amount of air supplied.

However, an electrical compensator with such a time difference is not only expensive, but also has the disadvantage that it takes time to repair once it breaks down.

The present invention was created in view of the current situation, and was an attempt to mechanically solve the problem without creating an electrical time difference.The present invention was designed to mechanically solve the problem without creating an electrical time difference. A damper is installed on the discharge side of the blower and on the side of the casing to control the amount of air supplied in a step-by-step manner.The damper is operated by a cam and a response plate, and the damper is close to a fully closed state during large combustion. The damper is closed to increase the amount of ventilation to the burner section, and during small combustion, the damper is opened according to the amount of fuel to reduce the amount of ventilation to the burner section. The valve opens further than the set opening degree for small combustion and then closes.

The present invention will be explained below with reference to drawings showing embodiments.

First, referring to FIG. 1, reference numeral 1 denotes a burner section placed in the upper part of an oil tank 2. A carburetor 5 is placed in a combustion tube 4 in which a flame port 3 is bored, and the surroundings of the combustion tube 4 are A ventilation chamber 7 is formed by covering the casing 6. Further, a blower tube 100 is inserted through the open end side of the carburetor 5, so that combustion air can be supplied into the carburetor 5 and the combustion tube 4. Of course, combustion air is supplied from the drive chamber 9 by the blades 81 of the blower 8. Here, the drive chamber 9 is the oil tank 2
Although it communicates with the upper air passage 10, the drive chamber 9
Air flows into the air passage 10 while being restricted by a manual damper 12 provided at the air passage entrance 11.
Although the manual damper 12 will not be described in detail, the degree of opening is determined by the mutual overlap between the holes in the fixed plate and the holes in the rotary plate. 13 is a damper attached to the casing 6, and like the manual damper 12, this damper 13 is also connected to the hole 135 of the fixed plate 131 and the rotating plate 1.
The degree of opening is determined by the mutual overlap with the 32 holes 136. Further, this damper 13 is configured to set the release air depending on its opening degree, and when the combustion amount is set to small, the opening degree of the damper 13 is made relatively large, and the combustion amount is set to be larger than the small amount. In this case, the opening degree of the damper 13 is set to zero or relatively small. Note that the damper 13 is provided on the discharge side of the blower 8, and its driving will be described later.

The vaporizer 5 is fixed to the shaft 82 of the blower 8 so that it can rotate, and since the kerosene diffuser 14 is fixed to the shaft 82, the vaporizer 5 is supplied from the pump 15 through the oil pipe 16. When kerosene is sprinkled onto the diffuser 14, the centrifugal force of the diffuser 14 causes the kerosene to move to the inner wall of the vaporizer 5 and descend.

By the way, the pump 15 controls the amount of oil in stages by changing the width of the reciprocating movement of the plunger inside it and by changing the number of reciprocating movements of the plunger per unit time, but since this is a well-known method, the explanation will be omitted. do.

Note that 17 is a guard for the burner section 1, and 37 is a radiator.

In the above configuration, when the pump 15 and the blower 8 are driven, the kerosene flows down along the inner wall surface of the rotating carburetor 5 while being diffused by centrifugal force, and at the start of combustion, the kerosene is at the bottom of the vaporizer 5. It is scattered from the scattering gap 18, ignited by the stop plug 19 inserted into the combustion tube 4, and burned. Further, the vaporizer 5 is heated by this combustion heat, and as a result, the kerosene sprayed on the inner wall of the vaporizer 5 is evaporated and vaporized. Then, this vaporized gas passes between the double-structured combustion tubes 4 due to the ventilation force of the blower 8, and heads toward the burner port 3 while being entrained with air. When the mixed gas sufficiently mixed with air is injected from the flame port 3, it is ignited by the combustion flame and starts vaporization combustion.

By the way, the above-mentioned combustion device is already known.

Now, the damper 13 that sets the amount of released air is driven by a cam 21 and a response plate 22 that respond to a manual knob 20 disposed at the top of the oil tank 2 via a wire 23.
3, one end is locked to the rotating plate 132, and the other end is locked to the locking rod 133 of the fixed plate 131.
The fully closed state is achieved by the contraction force of a spring 134 supported by the spring 134. This state is shown in FIG. That is, at this time, since there is no amount of escape air at all, the maximum amount of air can be supplied to the burner section 1. When the wire 23 is pulled to overcome the contraction force of the spring 134, the rotary plate 132 of the damper 13 rotates clockwise as shown in FIG. 135 and the hole 136 of the rotating plate 132 overlap each other to form an opening.

By the way, the manual knob 20 is fixed to a cam shaft 25 supported by a cam storage plate 24, and when the knob 20 is turned, the cam 21 rotates as the knob 20 rotates, causing the response plate 22 to substantially move up and down. and cam 21
is provided with a first stop part 211, a second stop part 212, and a third stop part 213, and further includes a cam 21.
The first groove portion 211' faces the first stop portion 211 about the camshaft 25, the second groove portion 212′ faces the second stop portion 212 in the same manner as described above, and the third groove portion 211′ faces the first stop portion 211 about the camshaft 25. A third groove portion 213' facing the stop portion 213 is carved in the same manner as described above. Incidentally, a cam 26 for combustion control is provided integrally with the cam 21, and the actuator 2 of the micro switch 27 which switches the oil amount of the pump 15 is provided.
71 and the actuator of the power switch 38 shown in FIG. Also, response plate 2
2 rotates around a pin 36 supported by a cam storage plate 24, but two plates 221 and 222
A fine adjustment screw 29 with a spring 28 interposed is screwed into the upper plate 221, and the lower plate 22
2 is brought into contact with the screw 29. Also, the lower plate 22
2, a rotatable roller 30 is fixed to the shaft. Note that the roller 30 is arranged in the first, second, and third groove portions 211′ so as to stop at the positions of the first stop portion 211, the second stop portion 212, and the third stop portion 213 of the cam 21. , 212', 213' is supported on a protruding plate 241 from the cam housing plate 24 via a leaf spring 32.

Here, when the roller 30 of the response plate 22 is positioned at the first stop portion 211, the combustion amount setting is small and the opening degree of the damper 13 is relatively large. Further, when the roller 30 of the response plate 22 is positioned at the second stop portion 212, the combustion amount setting is large and the opening degree of the damper 13 is zero. Of course, the damper 13 in this case may be set in a slightly open state. Further, when the roller 30 of the response plate 22 is positioned at the third stop portion 213, combustion is stopped or extinguished, and the opening degree of the damper 13 is zero as in the case where the combustion amount is set to large. . This allows only air to be supplied during extinguishing, and the combustion tube 4 to be air-cooled. Further, when transitioning from the small state to the large state, the raised portion 214 formed between the first stop portion 211 and the second stop portion 212 of the cam 21 substantially moves the response plate 22 upward. The opening degree of the damper 13 is temporarily made larger than the state where the combustion amount is set to small. As will be explained in detail later, the raised portion 214 is indicated by a dot in FIG.

By the way, the wire 23 has one end attached to the retainer 2.
31, it is supported by the cut and raised portion 33 of the rotary plate 132 of the damper 13, and the other end is supported by the upper plate 221 of the response plate 22 by a retainer 232. In addition, the wire 23 is connected to a pulley 34 supported by the cam storage plate 24.
It is suspended from a pulley 35 supported by a guard 17.

In the embodiment configured as described above, the cam 21 is set to the seventh position by the manual knob 20 when the combustion is stopped.
Although the state is shown in the figure, since the power switch 38 is open, all the devices are in a stopped state. Further, at this time, the damper 13 is in a fully closed state as shown in FIG. Here, when the manual knob 20 is turned counterclockwise against the leaf spring 32 that supports the positioning roller 31, the camshaft 25 rotates accordingly, which turns on the power switch 38, which causes the blower 8 and the pump 15 and the spark plug 19 are energized, and combustion starts as described above. Further, by rotating the manual knob 20, the state shown in FIG.
Since the roller 3 is positioned at the stop part 211 of
The lower plate 222 of the response plate 22 that supported 0 substantially moves upward, and the fine adjustment screw 29 in contact with the lower plate 222 also moves upward, and as the screw 29 moves upward, the upper plate 211 of the response plate 22 also moves upward. move. Therefore, the wire 23 whose one end is supported by the upper plate 211 is pulled, and the rotating plate 132 of the damper 13 rotates clockwise while resisting the contraction force of the spring 134. As a result,
As shown in FIG. 2, a rotating plate 132 and a fixed plate 131
The holes 136 and 135 overlap each other to form an opening in the damper 13. The opening degree of the damper 13 at this time is not fully open, but is relatively large. Therefore, the amount of air released is relatively large, and the amount of air supplied to the burner section 1 is small. Note that this amount of air can be changed to some extent using the fine adjustment screw 29. Further, the amount of oil supplied from the pump 15 is set to be small by pressing the actuator 271 of the micro switch 27. As a result, the amount of combustion is kept small.

Next, when switching the combustion amount from small to large, the manual knob 20 is further turned counterclockwise. The switching operation as described above is normally performed in an instantaneous operation of about one second. By the switching operation, the cam 21 is rotated counterclockwise, the positioning roller 31 is fitted into the second groove 212' of the cam 21, and the roller 30 is positioned at the second stop 212 of the cam 21 (the fourth (It will be in the state shown in the figure)
This will result in a large combustion. In addition, the third section describes the transition period from small combustion to large combustion.
To explain using the figure and FIG.
It will move along the raised portion 214 provided between 12. That is, the roller 30
Move along 4 A → B → C → D. At this time, the raised portion 214 slightly pushes up the roller 30 and moves the response plate 22 slightly upward, so the wire 23 is temporarily pulled and the rotating plate 132 of the damper 13 rotates slightly clockwise against the spring 134. As a result, the damper 13 opens more than in the state where the combustion amount is set to small, resulting in the state shown in FIG.
Increase the amount of relief air and temporarily decrease the amount of supplied air. Although the damper 13 is fully open in the state shown in FIG. 6, it may be set so that the opening degree is slightly larger than the state where the combustion amount is set to small. A, B, C, and D of the raised portion 214 in FIG.
This corresponds to A', B', C', and D of the curve showing the amount of supplied air in the figure, and the amount of supplied air is A' → B' → C' →
Migrate in the order of d′. Further, since the micro switch 27 that changes the oil amount of the pump 15 is switched at point A in FIG. 3, the amount of oil supplied for small combustion is switched to the amount of oil supplied for large combustion. Point A in Fig. 3 is the first
This corresponds to point A' in Figure 0, and the amount of supplied oil increases from point A', and instantly reaches the amount of supplied oil for predetermined large combustion. That is, as shown in FIG. 10, when the roller 30 moves along the protrusion 214, the amount of supplied air is temporarily reduced, and during this time the amount of supplied oil is changed from small combustion to large combustion.

Next, the case of transitioning from large combustion to small combustion will be explained using FIGS. This is done by turning it in the direction. This turns the cam 21 clockwise, and during the transition period from large combustion to small combustion,
The roller 30 moves in the order of the raised portion 214 from D to C to B to A. At this time, a raised part 214 provided between the first stop part 211 and the second stop part 212 of the cam
Since the roller 30 is slightly pushed up and the response plate 22 is moved slightly upward, the wire 23 is temporarily pulled, and the rotary plate 132 of the damper 13 is moved upward by the spring 1.
34, and as a result, the damper 13 increases its opening degree compared to the state where the combustion amount is set to small, resulting in the state shown in FIG. 6, which increases the amount of released air and temporarily reduces the amount of supplied air. After that, the damper 13 is in the state shown in FIG. 2. That is, the amount of supplied air changes as shown in FIG. 11, as shown in FIG. Also, the amount of oil supplied is shown in Figure 11.
The amount of oil decreases from point A' and instantly reaches the predetermined small combustion oil amount. That is, in the embodiment, FIGS. 10 and 11
As shown in the figure, by slightly reducing the amount of air supplied during the transition period from small combustion to large combustion and from large combustion to small combustion, there will be no lift combustion region where the amount of air supplied exceeds the amount of oil supplied, so lift combustion It can prevent the water from blowing out.

Further, during large combustion, the lower plate 222 of the response plate 22 moves downward, so the upper plate 221 moves downward accordingly, and the wire 23 connects to the spring 13 of the damper 13.
is pulled in the direction of the damper 13 by the contraction force of , and as a result, the rotary plate 132 of the damper 13 moves counterclockwise. Therefore, the damper 13 becomes fully closed as shown in FIG. 5, and the amount of air supplied to the burner section 1 increases to match the amount of oil supplied by the pump 15. Note that the damper 13 may be slightly opened during this large combustion.

Further, when changing from the state where the combustion amount is set to low to extinguishing the fire, the manual knob 20 is turned clockwise, thereby opening the power switch 38 and stopping the pump 15. Further, even if the power switch 38 is turned off, it is preferable to operate the blower 8 and air-cool the combustion tube 4, so the response plate 22 is lowered when the fire is extinguished. That is, in the extinguishing state, the positioning roller 31 is fitted into the third groove 213' of the cam 21 as shown in FIG. Keep it the same as when there is a large combustion. When the fire is extinguished, the micro switch 27 for changing the amount of oil in the pump 15 is the same as when the combustion amount is set to small, but since the power switch 38 is open at this time, it does not affect the operation.

Although the above has been explained using examples, the present invention has three
Needless to say, the present invention can be similarly applied to a combustion device in which the combustion amount is set in stages or more.

As described above, the present invention is a variable combustion rate system that controls the amount of oil from the pump 15 in stages, and releases the air from the blower 8 in stages accordingly, thereby controlling the amount of air supplied. In the combustion device, the amount of air released is set by the opening degree of the damper 13, and the damper 13 is controlled by the manual knob 12.
The damper 13 is driven via the wire 23 by the cam 21 and the response plate 22 that are responsive to the combustion amount, and when the combustion amount is set to small, the opening degree of the damper 13 is made relatively large, and the combustion amount is set to be larger than the small combustion amount setting. In some cases, the cam 21 is provided with at least the first stop 2 so that the opening degree of the damper 13 is zero or relatively small.
11 and a second stop portion 212, and furthermore, when the manual knob 20 is switched from the small combustion amount setting to the large combustion amount setting, the opening degree of the damper 13 is temporarily made larger than the state where the combustion amount setting is small. The first stop portion 211 and the second stop portion 212 of the cam 21
Since this is an air blowing mechanism for a combustion device characterized by having a protrusion 214 between them, combustion air is supplied to compensate for the oil supply delay of the pump 15 when the combustion amount setting is switched from small to large. Therefore, lift combustion and blow-out phenomena can be eliminated, which is extremely effective in practical use.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an embodiment of the present invention, and FIG. 2 is a front view of a damper portion in the embodiment of the present invention, showing a state where the combustion amount is set to small. FIG. 3 is a sectional view of the main part of the cam part in the embodiment of the present invention, showing a state where the combustion amount is set to small. Figure 4 is a cross-sectional view of the main parts similar to Figure 3, showing a state where the combustion amount is set to high;
FIG. 5 is a front view similar to FIG. 2, showing a state where the combustion amount is set to high. FIG. 6 is a front view similar to FIG. 2, showing a transient state when switching from a small setting to a large setting, and FIG. 7 is a sectional view similar to FIG. 3, showing a state in which combustion is stopped or extinguished. Fig. 8 is a sectional view showing the switch part in the embodiment of the present invention, Fig. 9 is an explanatory diagram of the operation of a conventional combustion device, and Fig. 10 is an explanatory diagram of the operation of the embodiment of the present invention. FIG. 11 is a similar operation explanatory diagram, and shows a state in which the combustion amount is changed from large to small. 1...Burner part, 2...Oil tank, 3...flame port, 4...combustion tube, 5...carburizer, 6...casing, 7...blow chamber, 8...blower, 81...blade , 82... Axis, 9... Drive chamber, 10... Air passage, 11... Air passage entrance, 12... Manual damper, 13... Damper, 131... Fixed plate, 132
... Rotating plate, 133 ... Locking rod, 134 ... Spring, 135 ... Hole, 136 ... Hole, 14 ...
Diffuser, 15...Pump, 16...Oil pipe, 17
...guard, 18 ... scattering gap, 19 ... spark plug, 20 ... manual knob, 21 ... cam, 211
...First stop part, 212...Second stop part, 2
13...Third stop part, 214...Protuberance, 21
1'...First groove, 212'...Second groove, 2
13'...Third groove part, 22...Response plate, 221
... Upper plate, 23 ... Wire, 231 ... Retainer, 232 ... Retainer, 24 ... Cam storage plate,
241... Projection plate, 25... Camshaft, 26... Cam, 27... Micro switch, 271... Actuator, 28... Spring, 29... Fine adjustment screw, 30... Roller, 31... Positioning roller , 32... leaf spring, 33... cut and raise, 34
...Pulley, 35...Pulley, 36...Pin, 37...
...Radiator, 38...Power switch, 100...Blower tube.

Claims (1)

[Scope of utility model registration request] In a combustion device with a variable combustion rate that controls the amount of air supplied by controlling the amount of oil from the pump in stages and releasing the air from the blower in stages accordingly, the amount of air released is controlled by a damper. At the same time, the damper is driven via a wire by a cam and a response plate that respond to the manual knob, and when the combustion amount is set to small, the damper opening is set relatively large and the combustion When the combustion amount is set larger than the small setting, the cam is provided with at least a first stop part and a second stop part so that the opening degree of the damper is zero or relatively small. When the manual knob is switched from large to small, there is a gap between the first stop part and the second stop part of the cam so that the opening degree of the damper temporarily becomes larger than the combustion amount setting small state. A blower mechanism in a combustion device characterized by being provided with a raised portion.