JPS59153490A - Electric cleaner - Google Patents

Abstract

PURPOSE:To enable to regulate a suction force automatically or preferably in response to the clogged state of a filter or the suction state of a suction port by providing manual suction force control means in an electric cleaner for automatically controlling the suction force. CONSTITUTION:The static pressure of a suction port 4 is transmitted through a pressure transmitting tube 9 to a semiconductor pressure sensor 10, which converts it to an electric signal. The signal is then amplified by an amplifier 36, and displayed on a display unit 38. On the other hand, the signal amplified by the amplifier 25 is fed back to a motor controller 27. Accordingly, the static pressure is large in the state that the filter is not clogged so that the feedback voltage becomes high, the ON period of a thyristor 39 becomes short to reduce the input, thereby reducing the static pressure. When the static pressure decreased, the feedback voltage becomes low, the input is, on the contrary, amplified, and held in balance at the prescribed point. Means for manually controlling the suction force via a variable resistor is provided, thereby preferably switching to automatic operation.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Field of Industrial Application The present invention relates to a vacuum cleaner that automatically controls suction force (motor power).

(3) Prior art In general, when the filter in a vacuum cleaner becomes clogged, the pressure in the air intake passage decreases, and the pressure in the air intake passage decreases depending on the relationship between the floor suction device and the floor surface (surface to be cleaned). It is well known that the pressure conditions in the passageways fluctuate.

Therefore, conventional vacuum cleaners have been proposed that automatically control motor power by detecting pressure changes in the intake passage using a variable resistor linked to a diaphragm, but due to the use of a diaphragm, the dust collection chamber becomes narrow and wiring Processing is also complicated and there are problems with reliability.7:B Furthermore, if the motor power is only automatically controlled, human power will be at its maximum when the filter is not clogged, resulting in more power than necessary, and conversely, when the filter becomes clogged, human power will be required. decreases, resulting in a lack of power.

C) Purpose of the invention The purpose of the present invention is to improve the usability of a vacuum cleaner that automatically controls the suction force by providing a manual suction force auxiliary means.2) Structure of the invention The 'Iα vacuum cleaner of the present invention has automatic control means that detects the static pressure in front of the filter with a transducer such as a pressure sensor, transmits this detection signal to the motor control circuit, and automatically controls the suction force. The variable resistor provided in the motor control circuit can be switched to a manual control means for manually controlling the suction force.

E) Examples Below, we will explain examples of the present invention illustrated in the figures.
is the main body case with a fan motor (2) and cord reel (3) installed at the rear, and an air intake port (4) at the front.

A dust collection chamber (5) is constituted, and a dust collection bag (6) with a filter function is installed inside the dust collection chamber. (7) is a rubber gasket constituting the intake port (4), and a pressure sensor 7t:181 is formed on the side wall of the gasket.

(9) is a pressure transmission pipe that transmits the pressure change in the pressure detection hole (8) to a semiconductor pressure sensor (10) arranged at the rear of the main body case (1), and the pressure sensor (10) is connected to another circuit. Printed circuit board 11311 with parts uuoz...
: Q is attached. ■) is a π static pressure display section provided on the top surface of the main body case (''), and 051 is a vibe attachment section provided on the front surface of the main body case (1). Telescopic vibrator (In-floor suction port u
A is connected to the grip portion f19 of the flexible hose 061, and a power control volume operation portion (2) is provided on the grip portion f19 of the flexible hose 061.

Hiromi is a 4-source transformer, C button J is a rectifying diode bridge, and q4I is a smoothing capacitor. 1 so 51 +26
1 is a signal amplification circuit for the semiconductor pressure sensor (10), the output of the signal amplification circuit G is sent to the controller control circuit 7, and the output of the signal amplification circuit 12bl is used to manually replace the static pressure display. The life is semi-fixed resistor %C for input adjustment (I3 is feedback 1, [resistance for applying pressure, 6υ is resistor for initial input setting, ■ is the volume for power control. Field is for switching between automatic control and manual control. It's a switch.

Next, the operation will be explained.

A) First, when the changeover switch is switched to contact ac) AUTo (automatic control) In this case, when using a vacuum cleaner, the increase or decrease in air volume will change depending on the flow of the air intake port (4), and the static pressure in this area will change in size. . Therefore, the static pressure of the intake port (4) is transmitted through the pressure transmission pipe (9) to the semiconductor pressure sensor (1■C = 1) on the reprinted board OJ. It is converted into an electrical signal, amplified by an amplification circuit, and displayed on a display device.

On the other hand, the signal amplified by the amplification circuit (251) is fed back to the motor control circuit c through the IIE pressure applying resistor l.
! Feedback is given to L. The motor control circuit ta is
Every half cycle of the power supply frequency (through two resistors tzn t3o+, the capacitor tE is charged, and the charging voltage is PU
When the gate 4 voltage of Tc3!3 becomes higher than the partial pressure value of resistors (7) and (b), PUT (to) is ON.
Thyristor (wo'17) through pulse transformer (to)
), a half-period circle, PUTca becomes O
From the point N and π until the end of the half cycle, the thyristor (to)
is a phase control circuit that repeats this operation.

Therefore, if the motor control circuit 11 is fed back to the fin, the filter, ie, collection 1244
When the bag (6) is not clogged, the static pressure is large and the feedback voltage is high, the charging pressure of the capacitor (to) is lowered by the feedback voltage, the charging speed is slow, and the ON time of the thyristor (to) is shortened. As a result, manpower is reduced and static pressure is reduced.

When the static pressure decreases, the feedback voltage decreases, which works to increase the human power, and at a certain point, the two years balance and maintain a constant state.

Next, when the filter and straw collection bag (6) become clogged, the air volume decreases, the static pressure decreases, and the feedback suppression also decreases at the same time. Then, the motor control circuit (2) works in the direction of increasing human power, increases the illuminated surface, and becomes an input according to the feedback voltage.

B) Contact the changeover switch M A N U A L
When changing one sword to another (manual control) If the motor control 60 circuit c near 1 t two signals are not fed back, the filter, i.e. dust collection bag (6)
When the C is clogged, the input is at its maximum, resulting in more power than necessary.On the other hand, when the C is clogged, the input decreases and the power is not needed.

In such a case of 1θ, manually operate the manual adjustment system (2) to adjust the manual power so as to obtain the desired suction force.

f) Effects of the invention The electric ll-4 removal according to the present invention C2 is the above-mentioned rZo <
, automatic control means that detects the static pressure in front of the filter with a transducer such as a pressure sensor and feeds back this detection signal to the motor control circuit to control the suction force +a; and a variable resistor installed in the motor control circuit. Since the manual control means for controlling the suction force using the C-f motion is switched between the automatic control and the manual control means for controlling the suction force using the C-f motion, it is assumed that 8. The gravity can be adjusted automatically according to the temperature of 2 degrees Celsius, allowing for efficient cleaning.

When switching to manual control in f., the input can be set to the desired input regardless of the clogging state, and usability is improved, which is a useful effect in practice.

[Brief explanation of drawings]

11.1 is an explanatory diagram of the vacuum cleaner according to the present invention in use, FIG. 2 is a perspective view of the vacuum cleaner main body, FIG. 6 is a cross-sectional plan view of main parts of the vacuum cleaner main body, and FIG. 4 is an electric circuit. It is 10. (21...Fan motor (61...Dust collection bag (filter) 101...Semiconductor pressure sensor (z
n... Motor control a] times K C3a... Volume for power control... Switch for switching

Claims (1)

[Scope of Claims] 1. Automatic control means that detects the static pressure in front of the filter with a transducer such as a pressure sensor and feeds back this detection signal to a motor control circuit to automatically control the suction force; and the motor control circuit. (A vacuum cleaner with two variable resistors and a manual control means for manually controlling the suction force.) The vacuum cleaner mentioned.