JPS63176698A - Electric motor-driven blower - Google Patents

Abstract

PURPOSE:To simplify a structure, by forming an electric motor-driven blower unit of a vacuum cleaner with a blower function in such a manner that the unit enables its suction side and exhaust side to be inverted further the unit can be removably mounted. CONSTITUTION:An electric motor-driven blower unit part 15 is connected being fitted respectively to an extension pipe 18 and a tubular member 23 of a power source side main unit 17. The unit part 15, forming its fitting part size having the interchangeability with the extension pipe 18, can be used even by inverted connection. The unit part 15 connects its terminal, provided in the suction port side, with a terminal 32 of the tubular member 23. Accordingly, a vacuum cleaner, which can be used as a blower only by inversely mounting the electric motor-driven blower unit, enables the main unit construction to be simplified with no necessity for a particular flow path switching mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum cleaner, and particularly to an electric blower having a blower function.

[Conventional technology]

The conventional vacuum cleaner with a blower function was manufactured by the Special Publication Publication No. 53-4.
As described in Japanese Patent No. 6030, the blower function was achieved by re-inserting a hose into a blower hose insertion port provided on the exhaust side of an electric blower built into the vacuum cleaner body. However, with this method, if there is a gap in the exhaust flow path of the electric blower, leakage will occur, causing abnormal airflow noise due to the leakage, and the blower will not be able to obtain the specified exhaust pressure.
In order to achieve airtightness, it was necessary to increase the number of screws for assembling the main body case and increase the number of channel wall components, which would result in a decrease in performance, requiring special consideration in design and manufacturing.

Further, the blower hose insertion port requires a flow path switching mechanism such as a valve body for preventing exhaust from blowing out when not in use, resulting in a complicated structure, which poses problems in terms of productivity and economy.

[Problem that the invention seeks to solve]

The conventional technology described above has the disadvantage that the flow path configuration for the blower function is complicated and it is difficult to obtain sufficient performance.

The above object is achieved by making the electric blower part reversible with respect to the intake side and the exhaust side of the main body flow path, and also capable of being detachably attached.

[Effect]

By making the electric blower into a unit and making it reversible and removable, it is possible to reverse the flow direction of the air flow while keeping the same flow path structure without requiring a special flow path switching mechanism. - Can be used as

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 7 is a cross-sectional view showing the basic parts of a conventional electric blower, such as a vacuum cleaner body. Reference numeral 1 denotes an electric blower using an AC commutator motor or the like, which is housed in a main body case 2. 3 is a filter, 4 is a dust collection case, and hose 5
The dust sucked through the dust collecting case 4 accumulates inside the dust collecting case 4.

50 is a blower hose insertion port. When the blower is not in use, the airflow is dispersed and exhausted from the dispersion exhaust port 53 by the blower hose insertion port 50, the S-blocking valve body 51, and the partition wall 52. Conventional vacuum cleaners generally have these basic elements and suffer from the above-mentioned problems.

FIG. 2 is a sectional view showing an electric blower unit section 15 showing an embodiment of the present invention, and the electric motor 6 has a permanent magnet rotor 7.
This is an inverter-driven motor that does not use carbon brushes or commutators, so it can be made smaller and faster. Highly functional operation is also possible in combination with a microcomputer. Of course, this can be achieved without using an inverter drive system, but in order to simplify, downsize, and improve the functionality of the motor configuration, it is preferable to use a brushless motor. A fan 8 fixed to the shaft of the rotor 7 rotates within a casing 10 formed integrally with a cylinder 9, and air flow sucked from the intake port 11 side of the cylinder part ]-0 as shown by the arrow. flows to be exhausted from the exhaust RO]-2 side.

Terminals 13 and 14 are the power source 1 for driving the electric motor 6.
The terminal portion is also electrically connected when it is removably connected to the power supply side main body 17 as described later. terminal 13
The arrangement of the terminals 14 is such that the electric motor 6 rotates so as to generate an airflow in the air blowing direction no matter which terminal is reversed and connected to the power supply side main body 17.

FIG. 3 is a side view of the cylindrical portion 9 seen from the exhaust port 12 side.

The overall size of the electric blower unit 15 having such a configuration is as shown in FIG.
The diameter is the same as that of the extension pipe 18 connecting the
If the diameter is about 30 to 50 nn, handling will be improved.

The suction port 16 includes a suction port 19, a filter 20, and an axle 21.
It slides on the floor to suck in dust and airflow as shown by the arrow, and the airflow filtered by the filter 20 passes through the extension pipe 18 and the electric blower unit section 15 to the main body 17 on the power supply side. be discharged.

The power supply side main body 17 has a cylindrical body 23 having a large number of exhaust holes 22.
A main body case 25 containing a power supply circuit section 24 such as an inverter is provided around the main body case 25, and the airflow passes through the exhaust hole 22 to cool the power supply circuit section 24, passes through the sound absorbing material 26, and exits from the exhaust window 27. is discharged to. 28 is the handle and cylinder body 2
It is provided integrally with 3. 29 is the power switch, 3
0 is the power cord.

As shown in Figure 2 below, the electric blower section, which was conventionally housed in a large main body that moved on the floor, has been transformed into a cylindrical unit with approximately the same diameter as the conventional hose (not shown) and extension pipe 18. This makes it possible to realize a new type of vacuum cleaner as in this embodiment.

This electric blower unit part 15 is fitted and connected to the extension pipe 18 and the cylinder body 23 of the power supply side main body 17, respectively, as shown in FIG. It can also be used even if it is reversed and connected as shown in Figure 4. That is, the terminal 14 provided on the intake port 11 side of the electric blower unit 15 is connected to the terminal 32 of the cylindrical body 23, and as shown in FIG. The air is exhausted from the exhaust port 12 side. 4
0 increases the blowing effect with an adapter that concentrates the airflow. It is also possible to attach and extend a flexible hose 41 as shown in FIG. 6 for use.

〔Effect of the invention〕 According to the present invention, the following effects can be obtained.

1. Simply install the electric blower unit upside down to create a blower.
The main body structure can be greatly simplified without the need for a special flow path switching mechanism.

2. The exhaust air from the electric blower unit is used directly as a blower, and there is no need to flow the exhaust airflow for the blower through the flow path inside the main body case, so seals and screws must be tightened to ensure airtightness on the joint surface of the main body case. This makes it possible to simplify the main body case structure.

3. The electric blower unit is removable and there is no need to disassemble the main body case when diagnosing failures or performing maintenance, greatly improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vacuum cleaner showing an embodiment of the present invention;
Fig. 2 is a detailed sectional view of the electric blower section of the embodiment, Fig. 3 is a side view thereof, Fig. 4 is a perspective view showing its usage state, and Fig. 5 is a detailed sectional view of the electric blower section of the embodiment.
6 is a sectional view showing an example of use as a blower, and FIG. 7 is a sectional view of a conventional vacuum cleaner. 11...Intake port, 12...Exhaust port, 15...Electric blower unit.

Claims (1)

[Claims] 1. The suction side and exhaust side of the electric blower can be reversed, and
An electric blower characterized by being detachably attached.