JPS58146332A - Electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner that controls the rotation speed of an electric blower by sensing pressure changes inside the vacuum cleaner using a pressure sensor.

Conventionally, pressure sensing in this type of vacuum cleaner detects the pressure difference between the rear part of the filter device and the outside air pressure, and controls the rotation speed of the movable blower based on this pressure difference.

The differential pressure that occurs here occurs both when the filter device becomes clogged and the ventilation resistance increases, and when the suction 1 is adsorbed to the floor, etc., so some parts of the sensor Therefore, it was not possible to determine which cause of the differential pressure was caused.

Therefore, conventional devices have been inconsistent in controlling the rotational speed of the electric blower by sensing the opening of the filter device.

Therefore, the present invention eliminates the drawbacks of the conventional method by detecting the pressure difference before and after the filter device of a blower with a built-in movable blower using a pressure sensor, and controlling the rotational speed of the NIF front blower using the output signal of the sensor. This is what I did.

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

fll is a blower case equipped with a pair of rear wheels +21t2) on both sides and a handle (3) integrally formed on the upper part. An electric blower (7) is arranged via an elastic a-mounting body (61) such as a com.

181ij/fE surface r4r1#X-wheel f91'k
(Redt) section and upper o++ h-c large suction port 110
), a handle (1), and a filter device (+
3) In the dust collection case containing the
) and the upper clamp means (1) are removably connected to the front surface of the machine case +1+.

The filter device is composed of a primary filter (16) and a secondary filter 07), and 81 dusts out of the dust that flowed in from the suction port 1101 are collected in the dust collection chamber (18) between the dust collection case (8) and the secondary filter frame. ), and fine dust is collected in a space (19) between the primary filter (06) and the secondary filter (17).

Therefore, ri0) is a semi-column pressure sensor housed in the narrow part 1) above the nfJ part of the blower case tll, and the low pressure side of the sensor is connected to the secondary filter device and the blower case +
The air intake space of the electric blower (7) (24Vc communication, high pressure side is connected to the blower case +1
The former capital dust collection chamber (+8) of the primary filter (16) is connected to the primary filter (16) through the trumpet-shaped connecting pipe (+23) that seals the elastic stored in is connected to.

Resisting self-recorded pressure (! 14 c2oIV) (Rl)
It is composed of a bridge circuit I @ 25) formed by (R2) (R3, ) (R4) and an Oi moving plate V 6), and its output is input to the control circuit 2 through an amplifier circuit shift). The rotation speed of the electric blower (7) is controlled.

With the above configuration, the primary filter (1
6) and when the secondary filter device becomes clogged, the pressure difference ΔP=Pl−P2 before and after the filter device θ3)
>0, the pressure sensor ρ0) senses the pressure difference between Pl and P2, and the aforementioned amplifier circuit (5) and control circuit 1
28) to increase the rotational speed of the electric blower (7) to prevent the suction power from decreasing. In addition, when the clogging condition of the filter device 03) is restored (b) by removing the expansion, the pressure difference before and after the filter device 03) described in nQ becomes smaller and the electric feeder J
The rotational speed of the R machine (7) returns to a steady state.

As described above, the present invention detects the pressure difference before and after the filter device using a pressure sensor, and controls the rotational speed of the electric blower based on the output signal of the sensor. It is possible to accurately capture the storage and maintain the suction force of the electric feeder at all times.

[Brief explanation of drawings]

Figure 1 shows a cross section of the main part of Gunki Keyaki 1 according to the present invention.
Fig. 1111 and Fig. 2 are explanatory diagrams of the pressure droplet height, and Fig. 6 is a block diagram of the nausea circuit. Il+...Blower case, (7)...Electric method m machine, (8)...Dust collection case, 03)...Filter device, 4...Pressure sensor. Applicant Sanyo Denki Co., Ltd. Agent Patent Attorney Seinu Sano Figure 1 0

Claims (1)

[Claims] 1) In a device constructed by removably connecting a ventilation case with a built-in electric cutter and a dust collection case housing a filter device to the curved surface of the case, the pressure difference between the front and rear of the filter device is 1. A vacuum cleaner characterized in that the rotation speed of the gt+ electric blower is controlled based on the output signal of the sensor.