JPS5861718A - 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 uses a half-door pressure sensor to detect the clogged state of the dust collection filter and the state of the 1 m floor to be cleaned, and automatically adjusts the suction force (motor power). This invention relates to a vacuum cleaner that is controlled in an IJ manner.

Conventionally, vacuum cleaners have been proposed in which the motor power is controlled by a variable resistor linked to a diaphragm, but these have the disadvantage of having many mechanical parts, making it difficult to centrally install electrical components, and making wiring difficult. .

In the present invention, a semiconductor pressure sensor that detects the pressure at the front of a dust collection filter is attached to a printed circuit board equipped with electrical components through a pipe, and this printed circuit board ψ is placed in an electrical compartment that houses fan motors, etc. -l.

, which has now overcome the drawbacks of the conventional method.

' Hereinafter, embodiments of the present invention shown in the drawings will be described.

(1) is a vacuum cleaner body with flexible wheels (2J) on the front of the bottom and a pair of rear wheel transport f3+ (34N) on both sides of the rear, and the inside of the body houses a bag-shaped dust collection filter (4). Dust chamber (
5), a fan motor room (7) which houses the fan motor (6), an electrical equipment room which houses the exhaust chamber (8) and the cord reel (9) in a tilted manner. The bag opening of the bag-shaped dust collecting filter (4) is formed in the front part of the dust collecting chamber (5) and is connected to the running suction port W, c111. u3 is a floor suction device with a suction port on the bottom, and this suction device has a telescopic tube 0.
3 and a flexible hose barb 9 with a touch-type remote actuation switch I to said inlet passageway υ.

Then, the fan motor (6) detects the pressure of the suction port passage aυ by the force of the flexible synthetic resin pipe (6).
) is a semiconductor pressure sensor that controls the output of a printed circuit board equipped with each electrical equipment component [171] The inclined cord reel (9) of the electrical equipment room and the main body (1) It is placed between the side walls. It faces the long notched hole t2fllK described above.

Next, the electric circuit shown in FIG. 5 will be explained along with its operation.

(2 is an AC power supply, Q is a power supply circuit, (23) is a drive circuit including a thyristor (24) that drives the fan motor (6) by opening and closing the touch-type remote control switch α, and (C) is a power supply circuit. A side leg circuit that detects changes in the front pressure of the dust filter [4J with a semiconductor pressure sensor 161 and controls the output of the fan motor +61] (261 is a side leg circuit installed in an inclined manner on the top surface of the vacuum cleaner body (1)). Arranged? M several (7
This is an output display circuit that displays the output of the fan motor (6) using LED lamps (+2107).

When the plug of the cord reel (91) is connected to the AC power supply (211) and the touch-type remote control switch (14) is closed by hand, the output of the touch ICt28j falls from HIGH to LOWIC, so the transistor is turned on and the photocoupler is turned on. The light-emitting diode r3D is also turned on, and the three light-receiving transistors are also turned on.Thus, the timing capacitor (to) and PUT (341) are repeatedly charged and discharged, and the gate current flows through the pulse transformer C1 to the thyristor (24). Said Sai 9 Star (2
41 is conductive and the fan motor 16) also rotates. 1 in this case? The timing at which 341 turns ON is determined by the feedback voltage applied across the resistor (support).

Further, since the pu'r 34) becomes conductive when the anode voltage becomes higher than the gate voltage, each voltage waveform becomes as shown in FIG. 6(a) and main part).

The semiconductor pressure sensor (161 is a pipe anvrc
Since it is designed to sense the static pressure (differential pressure from atmospheric pressure) in the intake passage συ, the static pressure increases when there is a lot of wind. Also, the floor suction tool 11' at the tip of the air intake passage συ!
If you block the JcD inlet, the inlet and fan motor (6
) decreases, so the pressure difference (degree of vacuum) with atmospheric pressure increases.

1j? In the past, if the conduction angle of the thyristor 241 was set to about 100 degrees when the dust collecting filter (4) was not clogged, the dust collecting filter (4) would As the eyes gradually become dizzy, the number of side pupils passing through the intake port passage (ill) decreases, so the static pressure decreases and the output of the semiconductor pressure sensor n61 decreases.Therefore, the output of the amplifier CD also decreases.
The feedback voltage applied across the resistor also decreases, and the charging voltage to the timing capacitor C131 increases, so the conduction angle of the thyristor 124) increases, and the effective voltage applied to the fan motor 61 increases, increasing its output. . Therefore, even if the dust filter (4) becomes clogged, a constant suction force is maintained.

Next, when the floor suction tool tta sucks into the carpet regardless of how much or how much the filter (4) is clogged, the degree of vacuum increases, and the output of the semiconductor pressure sensor ue increases, causing the timing capacitor to rise. The conduction angle becomes smaller because the charging pressure of the heat is lowered. Therefore, the output of the fan motor (6) is reduced to ensure thorough suction, allowing the nine-bed suction device port 4 to move smoothly.

These conditions are clear from the characteristic diagrams in Figure 7 (a) and (b), which show the relationship between the magnetic force consumed by the fan motor (6), the amount of dust collected, and the degree of closure of the floor suction device (12+). be.

In addition, the output of the fan motor (6) passes through the rectifier circuit (to), the voltage divider circuit No. 1, and the comparator (401) to output F16.
The LED lamps 1271 (2η...) are turned on to display the information.

Since the vacuum cleaner according to the present invention is constructed as described above, the semiconductor pressure sensor is small and has high sensitivity compared to conventional vacuum cleaners in which motor power is controlled by a variable resistor linked to a diaphragm. Therefore, it can be attached to a printed circuit board and centrally installed in the electrical equipment room along with other electrical components, which simplifies the wiring process. Since the static pressure in the air intake passage is transmitted via a pipe to the semiconductor pressure sensor mounted on the printed circuit board, the dust collection chamber can be used extensively when installing a diaphragm or the like.

Furthermore, if the pipe is made of a flexible synthetic resin tube, the pipe can be easily installed and will not become clogged.
! If the pipe is opened on the upper side of the pipe, fine dust will easily flow into the pipe, often degrading the sensing performance of the semiconductor pressure sensor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the vacuum cleaner according to the present invention in use;
2 is a perspective view of the vacuum cleaner main body, FIG. 5 is a cross-sectional plan view of the main part of FIG. 2, FIG. 4 is an explanatory view of the pressure sensing system in FIG. The figure shows the main electrical circuit diagram, and Figures 6 (a) and (b) show the timing capacitor and PU
T and thyristor voltage waveform diagrams, Figure 7 (a) and (
B) is a nine-characteristic diagram comparing the relationship between the power consumption of the fan motor and the shutoff of the exhaust and floor suction devices compared to the conventional one. (1)... Vacuum cleaner body, (4)... Dust collection filter, (6)... Fan motor, Ill... Electrical equipment room,
011... Inlet passage, 0 port... Semiconductor pressure sensor, [11... Pipe, (17)... Printed circuit board, (2)... Thyristor. Procedural amendment (method) June lθ, 1980 1, Indication of the case 1982 Patent Application No. 15B941 2 Name of the invention Vacuum cleaner, Person making the amendment Patent applicant Address Keihan Hondori, Moriguchi City 2-18 Name (188) Sanyo Electric Co., Ltd. Representative Kaoru Iue 4, Agent address Moriguchi-type Keihan Hondori 2nd Lower 18-5 Date and month of amendment order (shipment date) February 25, 1980 6. Clearance of the specification subject to amendment (no change in content) 7. Contents of amendment as shown in the attached sheet

Claims (1)

[Scope of Claims] 1) A semiconductor pressure sensor detects the pressure in front of a dust filter disposed in a collection and exhibition room through a pipe, and the output of a fan motor is automatically opened using a thyristor or the like. In the vacuum cleaner, the pipe communicates with an intake passage provided in the dust collection chamber, and the semiconductor pressure sensor is mounted on a printed circuit board equipped with various electrical components.
This vacuum cleaner is characterized by being installed in the electrical equipment room at the rear of the Fuji room. 2) The vacuum cleaner according to claim 1, wherein the pipe communicates with the upper surface of the air intake passage. 6) The vacuum cleaner according to claim 1 or 2, wherein the pipe is made of a flexible synthetic resin tube.