JPS6026271Y2 - Air blower in vaporizing burner - Google Patents

Description

[Detailed description of the invention] The present invention converts a large amount of swirling air blown out in a direction perpendicular to the motor shaft in the ventilation chamber into a swirling axial flow parallel to the motor shaft with little air loss. By directing the air to the vaporizing burner through the burner body, even with a small-diameter multi-blade blower, it is possible to obtain a sufficient amount of air to vaporize and burn a large amount of fuel under good conditions. This invention relates to a blower device for a vaporizing burner.

Conventionally, with the aim of shortening the motor shaft to eliminate the rotational run-out phenomenon of rotating members and at the same time providing a low-cost product, a vaporizing burner was placed on the tip side of the burner body in which the electric motor was installed, and a ventilation chamber was placed on the rear side. A vaporizing burner in which the airflow generated in the ventilation chamber is arranged in a communication manner and the wind generated in the blowing chamber is passed through the burner body to the vaporizing burner to carry out picturesque vaporization combustion is well known, as it was described before this application, for example, in Japanese Utility Model Publication No. 122899/1973. It is.

By the way, in the above-mentioned known vaporizing burner, a large amount of air is blown out in the direction perpendicular to the motor axis in the ventilation chamber, and after colliding with the peripheral wall of the ventilation chamber, it naturally flows toward the burner body. Since the air blows out in the axial direction while being directed to The air cannot be blown through the burner body to the vaporizing burner, and as a result, a large amount of fuel cannot be vaporized and burned in good conditions due to insufficient air supply. Since there is no forced swirling effect on the axial wind that is blown in this direction, the wind supplied from the burner body to the vaporizing burner is linear and flows through the narrow communication area between the burner body and the vaporizing burner. As a result, this wind collides with each other and the amount of air blown decreases, resulting in the disadvantage of requiring a multi-blade blower and an electric motor that are larger than necessary for the combustion amount of the vaporizing burner. It was strongly desired.

In view of the above, in order to quickly solve this problem, the present invention uses a part of the swirling wind blown out in a direction perpendicular to the motor shaft by a multi-blade blower wheel arranged at an eccentric position in the blower chamber. After being transferred to the partition wall side while spiraling along the peripheral wall of the ventilation chamber,
A collector is provided on the partition wall facing the motor room so as to sequentially project in an inclined manner toward the motor room along the direction of rotation of the swirl air so as to cover the first half of the swirling wind inlet side of the air outlet opened in the partition wall. It is guided by the wind protrusion wall and is forcefully and forcefully blown out from the blower port in the direction of rotation into the motor room, while a part of the other swirling air is installed in the eccentric swirling draft path on the wide side of the blower chamber. By the induction effect of the air guide wall, the swirling air is introduced into the air outlet on the intake side where the air guide wall is not installed, and then the swirling air is blown out from the air outlet in a concentrated manner and is regulated in the same direction. Moreover, the swirling wind blown into the motor chamber as described above is forced to swirl by the swirling wind generation guide, which is long extended in the eccentric swirling air path, and is directed toward the vaporizing burner side. This design minimizes loss due to air resistance, allowing a large amount of swirling air to be efficiently supplied to the vaporizing burner, even with a small multi-blade blower and a small electric motor. The purpose of this invention is to obtain an air blowing device for a vaporizing burner that can continue good vaporizing combustion over a long period of time by being heated. Let's discuss an example.

Reference numeral 1 denotes a burner body made of a thin metal plate formed into a hollow shape by press molding or the like. This is connected by inserting and installing the liquid-receiving part on the front end side of a hollow air blowing case 1', which has an intake cylinder 3 with a large number of intake holes 4 opened on the circumferential surface partially attached to the back side on the rear end open side. do.

A partition wall 5 is provided inside the open position of the rear end of the banana body to divide the inside of the burner body 1 into a motor chamber 6 and the inside of the space 1' into a ventilation chamber 7. An electric motor 8 is mounted so that one end is attached to the partition wall 5 and the other end is placed in an eccentric position by means of a mounting member 9, and a multi-blade blower wheel 11 is attached to a motor shaft 10 extending into the blower chamber 7.
The blade wheel 11 is also placed eccentrically within the ventilation chamber 7 by directly connecting the blades.

As described above, by eccentrically arranging the electric motor 8 and the multi-blade blower wheel 11, an eccentric swirling ventilation passage 12 is provided in the motor room 6, and an eccentric swirling air passage 13 is provided in the ventilation chamber 7. are formed respectively.

Inside the blow case 1' forming the eccentric swirling air passage 13 on the wide side in the air blowing chamber 7, a swirling jet is generated in the direction of the arrow in the eccentric swirling air passage 13 due to the rotation of the multi-blade blower impeller 11. The swirling wind duct 1 on the wide side receives and stops part of the swirling wind.
After the direction is guided and introduced into the air outlet 14 which is opened in an arc shape along the same direction as the swirling direction of the swirling air in the partition wall 5 at the position facing the air outlet 3, the eccentric swirling air is introduced into the air outlet 14 which is wide adjacent to the air outlet 14. A wind guiding wall 15 having an arc-shaped wind guiding surface on its surface and having the role of forcefully blowing air into the air passage 12 is installed along the axial direction so as to block the eccentrically rotating air generating passage 13 on the wide side. has been done.

Therefore, the aforementioned air guide wall 15 is provided at a position on the terminal end side of the air outlet 14 with respect to the swirling direction of the swirling wind in order to perform the above-mentioned guiding action.

On the other hand, the first half of the swirling wind introduction side of the ventilation opening 14, which is opened facing the wide eccentric swirling ventilation passage 12 on the motor room 6 side, is connected to the ventilation opening 1.
4 is inclined so as to protrude sequentially toward the motor room 6 side in the direction of rotation from the introduction starting end side of 4, and is covered with a wind collecting protrusion wall body 17 having an air outlet 16 facing in the direction of rotation at the end thereof. A part of the swirling wind that moves in the direction of the arrow from the air supply side to the partition wall 5 side in a spiral shape and moves to the air outlet 14 side in the direction of the arrow in the air passage 13 is guided and collected by the air collecting protrusion wall 17. The air is then concentratedly ejected from the air outlet 16 into the eccentric swirling air passage 12 on the wide side in the motor room 6.

Therefore, the rear half of the swirling wind introduction side of the air outlet 14 is simply opened, and a part of the swirling wind guided by the air guide wall 15 is passed through the air outlet 14 of the rear half of the swirling wind introduction side to the adjacent wide side. The air is ejected into the eccentrically rotating ventilation passage 12.

Reference numeral 18 refers to the swirling wind that is concentratedly blown out in the same direction as the swirling direction at the time of wind blowing into the eccentric swirling ventilation passage 12 on the side wider than the blowhole 16, and the swirling wind that is introduced after being guided by the wind guide wall 15. After merging the wind ejected into the eccentric swirling air passage 12 on the side wider than the air outlet 14 in the rear half of the side, the combined air is passed through the eccentric swirling air passage 12 in the same direction as the swirling direction when the wind is raised. The direction is a swirling wind generating guide body for forcing the direction toward the vaporizing burner 20 side, and the swirling wind generating guide body 18 has an arc-shaped shape as a whole with respect to the burner body 1. It is located near the terminal end of the air outlet 14 in the rear half of the swirling wind introduction side, with its proximal end attached to the partition wall 5 facing the motor room 6 side.

The free end side of the swirling wind generation guide 18 is made to extend long into the eccentric swirling ventilation passage 12, and a swirling ventilation gap 19 is formed between the inner peripheral surface of the burner body 1 and the outer peripheral surface of the swirling wind generation guide 18. When the combined air passes through the swirling ventilation gap 19, the combined air is forcibly given a swirling action in the same direction as the swirling direction in the eccentric swirling air passage 13.

Reference numeral 20 denotes a vaporizing burner that is removably attached to the blower tube 2 provided on the tip side of the burner body 1. An example of the vaporizing burner 20 will be described next.

A combustion tube 21 is made of a thin metal material and has a recess formed on the bottom wall 22 side.The front side of the motor shaft 10 is inserted into the combustion tube 21, and one end thereof is inserted into the combustion tube 21. The open vaporizer cylinder 23 is directly connected to the recessed side of the combustion cylinder 21 so that the open side faces the recessed side of the combustion cylinder 21.

A gas chamber 24 is formed between the peripheral edge of the vaporizing tube 23 and the recess, in which a mixed gas jetting passage 25 is provided.

Note that the blower tube 2 formed at the tip side of the burner body 1 is deeply inserted into the vaporizer tube 23 and opened.

An outer cylinder 26 is integrally attached to the outer periphery of the combustion cylinder 21 with a gap in which a cold air passage 27 is formed, and the starting end side of the cold air passage 27 has an air blowing port 28 opened in the circumferential surface of the air blowing cylinder 2.
It communicates with the inside of the blower tube 2 through the cooling tube 27, and a part of the swirling air that is blown is distributed into the cold air passage 27 to cool the combustion tube 21.

29 is an ignition plug, and 30 is an oil pipe for supplying fuel into the carburetor cylinder 23.

Next, its effect will be explained.

In the state shown in Figure 1, the electric motor 8 is started and the multi-blade blower wheel 11 is rotated in the direction of the arrow.

The outside air taken in through the intake hole 4 is transferred to the multi-blade blower wheel 1.
1, the wind turns into a swirling wind in the direction of the arrow and swirls in the eccentric swirling draft path 13.

However, in a part of the partition wall 5 that partitions the motor room 6 and the ventilation chamber 7, that is, in a position facing the eccentric rotation ventilation passage 12 and the eccentric rotation ventilation passage 13 on the wide side, there is a ventilation passage connecting the motor room 6 and the ventilation chamber 7. The opening 14 is opened, and the first half of the swirling wind introduction side of the ventilation opening 14, which is opened facing the eccentric swirling ventilation passage 12 side, is connected to the electric motor sequentially in the swirling direction from the swirling wind introduction starting end. It is covered with a wind collecting protrusion wall body 17 which is inclined so as to protrude toward the chamber 6 side and has a wind blowing hole 16 facing in the swirling direction at the end thereof, and is also covered with a wind blowing wall body 17 which is opened facing the wind blowing chamber 7. Since a wind guiding wall 15 for guiding the swirling wind toward the air outlet 14 is also installed in the eccentric swirling wind duct 13 at the end position of the rear half of the swirling wind introduction side of No. 14, the above-mentioned eccentric swirling wind The swirling wind that swirls in the direction of the arrow in the channel 13 has a spiral shape, and a part of it is introduced into the air collecting protrusion wall 17 from the air outlet 14 in the front half of the swirling wind introduction side, and then the wind blower 16
As a result, the other part of the swirling wind is vigorously blown out from the air outlet 14 in the rear half of the swirling wind introduction side into the adjacent eccentric swirling ventilation passages 12 while exhibiting a swirling state.

And the blower port 16 and the blower port 1 in the rear half of the swirling wind introduction side.
The winds blown out from each of the wind turbines 4 merge and are immediately guided to the swirling wind generating guide 18, and when passing through the swirling ventilation gap 19, a swirling action occurs in the same direction as the swirling direction of the eccentric swirling air path 13. is applied, and the burner body 1 is forcibly rotated along the inner periphery.

As a result, the air blown out in the direction perpendicular to the motor shaft 10 in the ventilation chamber 7 becomes a swirling axial flow parallel to the motor shaft 10 with little air resistance, and the air flows into the eccentric swirling ventilation passage 1.
2 is continuously blown toward the blower tube 2 side, and the blown air is forcibly given a swirling property, so a large amount of swirling wind remains as it is without colliding inside the blower tube 2. A part of the swirling air can be ejected into the cold air passage 27 from the air outlet 28 at the same time as being ejected into the vaporizing cylinder 23 .

As described above, the swirling wind blown out in the direction perpendicular to the motor shaft 10 in the ventilation chamber 7 is deflected in the axial direction with little loss due to ventilation resistance, and is continuously passed through the vaporization burner. 20, the fuel is sent through the oil feed pipe 30 into the carburetor cylinder 23 which is being rotated.

Then, the fuel is exposed to the injection action of the swirling forced wind and the vaporization tube 23.
Due to the centrifugal rotation action of the ignition valve, it diffuses, flows down and becomes fine particles, and is sprayed into the combustion tube 21 from the open circumferential end, where it is ignited by the spark plug 29, immediately causing live combustion, and intensely preheating the entire vaporization tube 23. .

As a result, the fuel subsequently fed into the vaporization cylinder 23 becomes vaporized gas in the process of being moved to the open side in a diffusion state due to the preheating effect, and this vaporized gas is forced into the gas chamber 24 while mixing with the swirling forced air. The mixed gas becomes a complete mixed gas, which is ejected from the mixed gas jet passage 25 into the combustion tube 25 and ignited with a low combustion amount to achieve good vaporization combustion.

In short, since the present invention has the above-mentioned specific configuration, (1) the inside of the burner body 1 is easily divided into the motor chamber 6 and the ventilation chamber 7 by a single partition wall 5; The electric motor 8 and the multi-blade blower wheel 11 can be housed in the blower chamber 6 and the blower chamber 7, respectively.

(2) The electric motor 8 and the multi-blade blower wheel 11 are arranged in eccentric positions in the motor room 6 and the ventilation chamber 7, respectively, and the eccentric swirling ventilation passage 12 is provided in the motor room 6 and in the ventilation chamber 7. They form eccentric swirling air passages 13, respectively, to direct the swirling air generated in the ventilation chamber 7 and blown in a direction perpendicular to the motor shaft 10 into the motor chamber 6 in a swirling state parallel to the motor shaft 10. The direction can be jetted toward the tip side while changing the direction of the axial swirling wind.

(3) A wind guide wall body 15 is installed in the wide swirling air passage 13 in the ventilation chamber 7, and the air guide wall 15 is opened in the partition wall 5 while guiding a part of the swirling wind generated in the ventilation chamber 7. From the air outlet 14 in the rear half of the swirling air introduction side, the air can be accurately blown into the adjacent wide eccentric swirling air passage 12 in a swirling state with little loss of air.

(4) Other swirling winds swirling in the ventilation chamber 7,
It was attached to the partition wall 5 facing the motor room 6 so as to protrude in an inclined manner toward the motor room 6 in the direction of rotation from the starting end of the introduction of the swirling wind so as to cover the air outlet 14 in the front half of the swirling wind introduction side. After the air is collected by the air collecting protrusion wall 17, the air blowing hole 16
From there, the air is concentrated into the wide eccentric swirling ventilation passage 12 in the motor room 6 in the same direction as the swirling direction when the air is raised, and a large amount of swirling air is blown out in the direction perpendicular to the motor shaft 10. The air can be easily supplied to the vaporizing burner 20 by changing the direction to face the axial flow direction through the port 14 and the blower port 16.

(5) Swivel ventilation passage 12 from the air outlet 14 and the blower outlet 16
Each of the swirling winds ejected into the blower chamber 7 is immediately caused to flow through the swirling ventilation gap 19 by the guiding action of the swirling wind generation guide 18, thereby forcing the swirling wind to have a swirling action in the same direction as the swirling direction inside the blowing chamber 7. This reduces the loss due to air resistance when air is supplied to the vaporizing burner 20 as much as possible, and even with a small multi-blade blower wheel 11 and a small electric motor 8, a large amount of swirling air can be easily vaporized. By blowing air to the burner 20, it is possible to increase the amount of vaporized combustion.

Many other effects can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention, and the first
The figure is a front view with the main parts cut away, Figure 2 is a right side view of Figure 1 with the blower case removed from the burner body, and Figure 3 is a view of the partition wall from the motor room side when the burner body is cut vertically. FIG. 4 is a cross-sectional plan view taken along the line A--A in FIG. 3, and FIG. 5 is a perspective view of the ventilation case. 1... Burner body, 5... Partition wall, 6
...Motor room, 7...Blower room, 8...
...Electric motor, 10...Motor shaft, 11...
...Multi-blade blower impeller, 12... Eccentric swirling ventilation duct, 13... Eccentric swirling draft duct, 14...
・Air outlet, 15... Air guide wall, 16...
・Blow nozzle, 17... Wind collector protrusion wall, 18...
... swirling wind generation guide, 19... swirling ventilation gap, 20... vaporization burner.

Claims (1)

[Scope of utility model registration request] The inside of the burner body, which is equipped with a vaporizing burner on the tip side, is divided into a motor room and a ventilation chamber by a partition wall, and an electric motor and a multi-blade fan wheel directly connected to the motor shaft are installed eccentrically in the motor room and the ventilation chamber, respectively. an eccentric swirling ventilation passage and an eccentric swirling draft passage are arranged in the motor room and the ventilation chamber, respectively;
In the eccentric swirling air duct on the wide side of the above-mentioned ventilation chamber, the swirling wind generated is guided into the air outlet opened in the partition wall and is blown out into the wide eccentric swirling air duct on the motor room side. In the case where a wind guide wall is installed, the front half of the swirling wind introduction side of the air outlet opening facing the motor room side is such that it projects sequentially toward the motor room side in the swirling direction from the swirling wind introduction starting end side. It is covered with a wind collecting protrusion wall body which is inclined and has a blower opening facing in the swirling direction at its end, and is located near the rear of the blower at the end of the rear half of the swirling wind introducing side, and also facing the motor room side. A vaporizing burner characterized in that a swirling wind generating guide is mounted on the partition wall so as to extend long into the eccentric swirling ventilation passage so as to form a swirling ventilation gap between the partition wall and the inner peripheral surface of the motor chamber. Air blower.