JPS5839172Y2 - vacuum cleaner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small-sized vacuum cleaner and aims to improve its suction ability.

An embodiment of the present invention will be described below with reference to the drawings.

The vacuum cleaner main body 1 consists of a dust collection case 2 and a blower case 3.

The dust collection case 2 is a single synthetic resin molded body, but the blower case 3 is divided into left and right sides by a dividing plane that includes the center line of the case and extends parallel to the iron wire, as shown in Figures 2 and 3. It consists of a pair of synthetic resin molded bodies 4a and 4b.

The molded bodies 4 a and 4 b are connected by screwing screws from the molded body 4 b into four screw holes 5 formed in the molded body 4 a.

A cylindrical part with a slightly smaller diameter is formed in the front part of the blower case 3, and a threaded groove 6 is cut on the outer periphery of the cylindrical part, and the dust collection case 2 is inserted into this part.
Screw the opening.

The dust collection case 2 has a lower suction device connection in the front part, and a check valve 10 made of a thin rubber plate is attached to the inside thereof using a mounting boss 8 and a retaining ring 9.

Reference numeral 11 denotes a filter support frame made of soft synthetic resin that fits into the opening of the dust collection case 2, and has a double annular lip on the rear surface that tightly contacts the blower case 3, and a cloth bag-like filter 12 on the front surface. It is attached to the rim of the mouth.

A cage-shaped portion 13 that supports the filter 12 from the inside is also integrally molded into the support frame 11.

The blower case 3 has a cylindrical protrusion 14 on the front surface that enters into the dust collection case 2, and a bundle section 16 partitioned by a partition wall 15 on the rear part.

The section before the partition wall 15 is the rear partition wall 1 of the front partition wall 17.
8 into three chambers, in front of the front partition wall 17, that is, inside the protrusion 14, is a motor chamber 19, between the front partition wall 17 and the rear partition wall 18 is a fan chamber 20, and behind the rear partition wall 18 is an exhaust chamber 21. It becomes.

The protrusion 14 has a large number of ventilation holes 22 around its periphery, and has an inward annular groove 23 at its tip, where the cushion 2 is inserted.
The flange 26 of the electric motor 25, which is wrapped with a cylindrical tube 4, is fitted into the flange 26 to support the electric motor 25.

The front bulkhead 17 has a so-called bellmouth-shaped intake port 27 in the center that expands forward into a trumpet-like shape, and the motor shaft 28 enters the fan chamber 20 through this intake port 27, into which a centrifugal fan 29 is installed. Fixed.

The inlet 30 of the fan 29 is close to the intake port 27 .

The rear bulkhead 18 is formed integrally with the inner surface of the case in the form of an annular rib and has a large circular opening 31 in the center.

An exhaust port 32 is provided at the bottom of the exhaust chamber 21. 33 is a power cord that supplies power to the electric motor 25, and 34 is a switch that opens and closes the power circuit.

A synthetic resin diffuser plate 35 surrounding the fan 29 is disposed in the fan chamber 20.

The thickness of the tough user plate 35 in the front and back direction is equal to that of the fan chamber 2.
The depth in the front and back direction of 0 is almost the same.

As seen in FIG. 2, two protrusions 36 and 37 are formed on the inner surfaces of the molded bodies 4a and 4b, respectively, so that the two protrusions 36 and 37 abut against the outer peripheral surface of the tough user plate 35. ,
4b, the above-mentioned multiple user board 3
5 is clamped and fixed between the protrusions 36 and 37.

As shown in FIG. 2, four guide vanes 38 surrounding the fan 29 are formed on the front surface of the diffuser plate 35, and on the outside of each guide vane 38 there is a roller that guides the airflow to the back surface of the diffuser plate 35. Flow vanes 39 are formed.

Auxiliary vanes 40 are formed on the outer periphery of the diffuser plate 35 to form a pair with the commutation vanes 39. Eventually, around the diffuser plate 35, commutation vanes 39, A total of four air guide paths 41 are formed, which pass through the gap between the auxiliary vane 40 and the inner wall of the case to the rear surface of the diffuser plate.

A ventilation gap is formed between the back side of the tough user plate 35 and the rear bulkhead 18, and a total of four holes are formed at the end of each air guide path 41.
guide ribs 42 are formed.

Each guide rib 42 is in the shape of a dead end, and four guide ribs are combined in the shape of a cul-de-sac.

As seen in FIG. 3, a predetermined area inside the guide rib 42 is exposed through the opening 31 of the rear partition wall 18, and the air guide path 41 communicates with the exhaust chamber 21 from here.

43 is a recess formed in the center of the diffuser plate 35 to receive the end of the motor shaft 28.

Next, the action will be explained.

When the electric motor 25 is operated and the fan 29 is rotated, air is sucked in from the suction device connecting lower part, and the air, which has been filtered to remove dust by the filter 12, enters the motor room 19 through the ventilation port 22 and is sucked into the fan 29 through the suction port 27. , are discharged from the outer periphery of the fan 29.

The discharged air is divided by the guide vane 38 and sent into the air guide path 41 without needlessly going around the fan 29, and the kinetic energy is effectively converted to pressure and air is blown with high efficiency.

As shown by the broken line in FIG. 5, the air has a large tangential motion component and escapes to the back of the stiff user plate 35, so unless some measure is taken, a large and powerful air vortex will form inside the exhaust chamber 21. However, in this embodiment, the end of the air guide path 41 is formed by the ventilation gap between the guide rib 42 and the rear partition wall 18. The tangential motion component of the airflow is reduced at the dead end of the guide rib 42,
Since the air then enters the exhaust chamber 21, no vortices are formed in the exhaust chamber that would reduce the air supply efficiency.

As described above, the present invention provides a vacuum cleaner in which a blower case is constructed by joining a pair of molded bodies divided along a plane parallel to the center line of the case. Annular front and rear partitions facing each other are integrally formed in a protruding manner, and a centrifugal fan driven by an electric motor and a tiff user plate surrounding the fan are installed in a fan chamber formed between the side partitions. A bell mouth shape is arranged in the front and rear, and the outer circumferential surface of the multiple user plate is held and fixed in contact with the inner surface of the defined molded body, and the opening of the front partition wall is opposite to and close to the inlet of the centrifugal fan. Since the opening of the rear bulkhead is connected to the exhaust side air guide path of the multiple user plate, the case itself can be made into a fan casing with high air supply efficiency due to the arrangement of the diffuser plate. Can be done.

Furthermore, since the diffuser plate is sandwiched between a pair of molded bodies, attachment of the diffuser plate is extremely easy.

As described above, according to the present invention, in a vacuum cleaner in which a part of the blower case is used as a fan casing, the air supply capacity and suction efficiency can be improved with a simple structure, which is highly effective in practice.

[Brief explanation of the drawing]

The drawings show an embodiment of the vacuum cleaner of the present invention, in which FIG. 1 is a sectional view of the vacuum cleaner body, FIG. 2 is a sectional view of the section III in FIG. FIG. 4 is a side view of the diffuser plate, and FIG. 5 is a rear view thereof. 3... Blower case, 4 a, 4 b...
... Molded body, 17... Front partition, 18...
... Rear bulkhead, 29 ... Centrifugal fan, 35.
......Tiff user board, 27...Intake port, 30...Inflow port, 41...Air guide path, 31...Opening.

Claims (1)

[Scope of utility model registration request] In a case where a blower case is constructed by joining a pair of molded bodies divided along a plane parallel to the case center line, an annular front is formed on the inner surface of each molded body and abuts against each other with a gap between them. The front partition wall and the rear partition wall are integrally formed to protrude, and a centrifugal fan driven by an electric motor and a diffuser plate surrounding the fan are arranged in the front and rear in a fan chamber formed between the two walls, and the outer periphery of the diffuser plate is arranged in the front and rear. The surface of the front partition is clamped and fixed in contact with the inner surface of the molded body, the opening of the front partition wall is a bellmouth-shaped intake port facing and close to the inflow port of the centrifugal fan, and the opening of the rear partition wall is the opening of the diffuser plate. A vacuum cleaner, characterized in that the vacuum cleaner is connected to the exhaust side air guide path of the vacuum cleaner.