JPH067802Y2 - Blower - Google Patents

Description

TECHNICAL FIELD The present invention relates to a blower, and more particularly to a blower suitable for a working machine such as a backpack-type wind sweeper.

2. Description of the Related Art For example, a conventional blower used for a wind sweeper that collects fallen leaves and the like with discharge air is designed to supply air from a suction port provided on one side of a relatively large-diameter spiral blower casing containing a rotary impeller. While sucking and pressurizing the air in the spiral chamber in the casing, the pressurized air is discharged from the discharge port opened in the tangential direction of the casing.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional structure of such a blower, a large diameter casing and impeller are required in order to obtain a sufficient discharge force, and it is difficult to reduce the size and the weight is heavy. Especially when used on a backpack-type working machine, the burden on the operator is heavy, making it difficult to work for a long time, and a complicated and expensive structure for switching the blower according to the purpose of using positive pressure air or negative pressure air. However, there is an inconvenience that it is difficult to use the working machine as a sprayer of chemicals and fertilizers for multipurpose.

Therefore, an object of the present invention is to eliminate the inconvenience of the conventional blower as described above and to provide a blower of a simple and convenient form.

Means for Solving the Problems That is, a blower according to the present invention has blades formed on both axial sides of an impeller having a main body that divides an impeller chamber divided by a blower casing into two chamber parts, A suction port for sucking external air is formed in an outer wall portion of one chamber portion of the impeller chamber, and a suction port chamber is continuously provided at an outer portion of the other chamber portion of the impeller chamber, and the suction port is provided. The present invention is characterized in that a suction port for sucking external air into the chamber and an opening that can communicate with the outside are formed, and that the opening is provided with an adjusting member that is operated to adjust the opening degree.

Therefore, external air is sucked into the impeller chamber from both sides of the casing, and the suction force from the suction port can be adjusted by opening and closing the opening of the suction port chamber with the adjusting member, and other fluid can be sucked in at the same time. , The fluid can also be mixed with air and delivered.

Embodiment Next, the present invention will be described based on an embodiment of the drawings.

The illustrated embodiment is an example in which the present invention is applied to a blower of a backpack-type wind-sweeper. This wind-sweeper, as shown in FIG. An engine 2 and a blower 3 are mounted, the internal combustion engine 2 is of a normal air-cooled two-cycle type, is provided as a prime mover for driving the blower 3, and includes a cylinder 4 and a cylinder 4 thereof.
A piston 5 reciprocally provided therein, a crankcase 6 connected to the cylinder 4, and a crankshaft rotatably supported by the crankcase 6 and connected to the piston 5 by a connecting rod 7. 8 and the crankshaft 8
And a recoil-type starter 9 disposed close to one end of the crankshaft 8 and mounted on the mount 1 with the crankshaft 8 oriented in the vertical direction.

The blower 3 is arranged on the other end side of the crankshaft 8, and has a spiral blower casing 10 and the casing.
And an impeller 11 which is disposed in the rotary shaft 10 and is connected to the other end of the crankshaft 8 to be rotationally driven. The casing 10 is attached to the crankcase 6 coaxially with the crankshaft 8 by a plurality of bolts (one of which is indicated by 12), and the casing 10 includes blades on which the impeller 11 is arranged. A casing 13 and a spiral chamber 14 that communicates with the impeller chamber 13 and is formed around the impeller chamber 13 are defined. The impeller 11 is
A plurality of blades 16 and 17 are integrally formed on both side surfaces of the disk-shaped main body 15 in the axial direction of the crankshaft 8, and the main body 15 is the impeller chamber of the casing 10. 13 is divided into two chamber parts 18 and 19 in the axial direction, the upper surface blade 16 of the main body 15 is arranged in the upper chamber part 18, and the lower surface blade 17 is arranged in the lower chamber part 19. To do. The casing 10 forms a suction port 21 in the outer wall portion 20 of the upper chamber portion 18 of the impeller chamber 13 for sucking external air into the upper chamber portion 18. On the other hand, the impeller chamber
The outer wall portion 22 of the lower chamber portion 19 of the 13 has a central opening 23
And the central opening 23 is formed in the casing.
It is covered by an inlet chamber 25 fixed by a plurality of bolts, one of which is shown at 24, screwed onto the outer wall portion 22 of the 10.

As described above, since the blower 3 is configured as a double suction type, it is possible to make the casing diameter smaller than other blowers having the same blowing force, and as in the present embodiment, the blower is set to the vertical axis. It is possible to improve the operability by mounting on the backpack mount 1 in a formula and moving the center of gravity of the entire body to the operator side.

As shown in FIG. 1, the suction inlet chamber 25 has a lower end portion 26 having a recessed central portion, and the lower end portion 26 has a plurality of openings 27 formed at angular intervals. There is. Furthermore,
The lower end portion 26 is a pivot shaft attached to the central portion.
The lower end portion 26 is provided with an adjusting member 29 rotatable about 28.
On the outer surface of the. The adjusting member 29 has a plurality of openings 30 formed similarly to the openings 27 of the lower end portion 26 of the suction port chamber 25. The adjusting member 29 is fitted with a lever member 31 extending radially outward therefrom. Therefore, the adjusting member 29 holds the lever member 31 and pivots in the angular direction to align the opening 30 with the opening 27 of the suction port chamber 25, as shown in FIG. It can be arranged at an appropriate position between the aligned state and the fully closed position in which the opening 27 of the suction inlet chamber 25 is closed by moving in the angular direction.

Further, the suction port chamber 25 has a suction port 32 extending in the lateral direction.
(FIG. 2) is integrally formed. The suction port 32 can be closed by a removable cap (not shown), and a suction pipe and a drug supply pipe (not shown) can be separately attached.

Furthermore, the casing 10 has a discharge port 33 that opens from the swirl chamber 14 in the tangential direction thereof, and the discharge port 33 can be connected to a device such as a blow pipe or a drug spray pipe.

With the above-described configuration, when the granular or powdery medicine or fertilizer is sprayed, the adjusting member 29 is moved to the fully closed position to close the opening 27 of the suction inlet chamber 25 and to close the suction inlet 32 of the suction inlet chamber 25 with the chemical. And connect to a fertilizer source to inhale chemicals and fertilizers,
Further, a spray pipe for medicine or fertilizer is connected to the discharge port 33. When the internal combustion engine 2 is started in this state, the impeller 11 of the blower 3 is rotationally driven, whereby the blades 16 on the upper surface of the impeller 11 suck the outside air from the suction port 21 to the upper chamber portion 18 of the impeller chamber 13. And is discharged into the swirl chamber 14. At the same time, a negative pressure is generated in the lower chamber portion 19 of the impeller chamber 13, so that chemicals and fertilizers are introduced from the suction inlet 32 of the suction inlet chamber 25 to the lower chamber portion 19 of the impeller chamber 13.
Is sucked in, and from there is delivered into the swirl chamber 14,
In 14, the chemicals and fertilizer are mixed with the pressurized air and sprayed together with the pressurized air from the discharge port 33 to the outside through the spray pipe.

Further, when it is desired to discharge only the pressurized air from the discharge port 33 for the purpose of use, the suction port 32 of the suction port chamber 25 is closed, and the adjusting member 29 is swung to the fully open position for suction. The opening 27 of the mouth chamber 25 is opened so that the outside air is sucked into the impeller chamber 13 from the upper suction port 21, and at the same time, the opening 27 of the suction port chamber 25 is opened.
Can also be sucked into the impeller chamber 13, and thus a sufficient amount of air can be delivered to the swirl chamber 14 and supplied from the discharge port 33 to the outside as a powerful air blow.

It is also possible to connect a suction pipe to the suction port of the suction port chamber 25, suck the fallen leaves and the like while adjusting the suction force with the adjusting member 29, and take them into the dust collecting bag connected to the discharge port.

Effect of the Invention With the configuration of the present invention described above, the present invention can be used as a blower for delivering pressurized air, and by operating an adjusting member, a fluid other than air is sucked by negative pressure and pressurized. It can be sent together with air, can be used for a wide range of applications such as spraying chemicals and fertilizers, in addition to the blower, and can be manufactured inexpensively with a small structure, especially for work machines such as backpack type wind sweepers. Even in such a case, there is an effect that it can be optimally used.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a side main part of an embodiment in which the present invention is applied to a backpack-type wind sweeper, and FIG. 2 is a partial cutaway view of a lower part of the blower of FIG. 10 …… Blower casing, 11 …… Imperor, 13 …… Imperial chamber, 18,19 …… Room part of impeller chamber, 20,22 …… Outer wall part, 21 …… Suction port, 25 …… Suction Mouth chamber, 27 ... Opening, 29 ... Adjusting member, 32 ... Suction port.

Claims (1)

[Scope of utility model registration request] 1. An impeller (11) having a main part (15) for dividing an impeller chamber (13) partitioned by a blower casing (10) into two chamber parts (18, 19) on both sides in the axial direction. Each of the blades (16, 17) is formed, and an intake port (21) for sucking external air is formed in an outer wall portion (20) of one chamber portion (18) of the impeller chamber. The outer wall portion (22) of the other chamber portion (19) is provided with a suction port chamber (25) in series, and the suction port (32) for sucking external air into the suction port chamber and an opening that can communicate with the outside (27), and a blower characterized in that the opening is provided with an adjusting member (29) operated to adjust the opening.