JPS62240017A - 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] (a) Industrial application field The present invention is directed to a collection of industrial applications. This invention relates to a vacuum cleaner that detects and displays u.

(Example) Conventional technology In conventional vacuum cleaners, the method of detecting the amount of collected dust is to use a mechanical indicator to measure the amount of collected dust by moving a float based on the pressure difference between the intake side of the vacuum cleaner and the atmosphere. For example, there are those that use a semiconductor pressure sensor to detect the pressure difference before and after the dust collection filter device and display the 14gk (see, for example, Japanese Utility Model Publication No. 51-41409). -61719) have been proposed.

The former has the disadvantage that the indicator may show the maximum value even when the suction port is closed, making it impossible to detect clogging of the filter device with dust.

In addition, the latter can detect actual dirt clogging using a semiconductor pressure sensor, but by closing the suction port, the pressure difference between the front and rear of the dust collection filter device is reduced by /7%.
Therefore, there is a drawback that the output voltage of the semiconductor pressure sensor becomes small and the amount of collected a cannot be detected accurately.

Furthermore, the collection r11f display method described above has a problem in that when the electric blower is stopped, the pressure difference becomes zero and the display of the amount of collected dust cannot be maintained.

(c) Problems to be solved by the invention The present invention has been made in view of the above points, and is an electric blower that can accurately display the amount of collected dust not only when the electric blower is in operation but also when it is stopped. The purpose is to provide a machine.

(d) Means for Solving the Problems The t% vacuum cleaner of the present invention includes a float type sensor that detects the pressure difference before and after the dust collection filter device and responds to the moving float, and a signal from the sensor. The apparatus includes a display means for displaying the amount of collected dust, a holding means for holding the display state of the display means, and a switch means for applying a reset signal to the holding means.

(E) Effect According to the present invention, by converting the amount of movement of the float into an electrical signal and inputting it to the holding means, the suction port is closed, the differential pressure is reduced, and the float returns to its original position. Since the holding means does not change and holds the maximum value, the original amount of collected dust is detected and displayed. Furthermore, even if the switch means is turned off, the dust collection amount display is maintained without disappearing, so that the dust collection amount can be grasped even after cleaning is completed.

(v) Example A flexible hose (3
) is connected to the floor suction device (5) via the extended IK"# (4). The vacuum cleaner main body (1) has an electric blower (6) built in at the rear, and a lid body at the front. (7) forms a dust collection chamber (8) which is opened and closed.The dust collection chamber (8)
A dust collecting filter device 12), which is constructed by installing a paper bag filter (10) and a nonwoven fabric filter (11) in a dust collecting box (9), is removably provided. Further, rear wheels (13) are provided on both rear sides of the vacuum cleaner body (1), and swivel front wheels (14) are provided on the front bottom part of the cleaner body (1) to enable the cleaner to run.

(15) is a float type sensor having a float (16) disposed in the internal space of the lid (7), and the sensor is located before and after the dust collection filter device (12), that is, in the suction port (2). ) and the intake side of the electric blower ail (6) are connected to each other by a tube <17) (1g>), and a spring (1
9), a float part (20) slidably houses the float (16), and a plurality of reflective photosensors (20) housed above the float part and attached to the substrate (21). 22) (22)... $ C23) is a display part of the display means provided on the lid (7), and the display part is a reflective photo sensor.
(22) In response to (22)..., a plurality of indicator lights (2
4>(24)... each has. The indicator light (24)
(24)... are lit according to the movement of the float <16> which detects the pressure difference before and after the dust collecting filter device (12).

FIG. 5 shows a diagram in which a signal indicating the movement of the float (16) is detected by a float type sensor (15), and this signal is input to a holding circuit (26) constituting the holding means (25). Furthermore, it is input to a display driver (27), and its output drives a display section (23).

The holding circuit (26) sends the signal to the reset circuit (28) when the float sensor (15) No. 18 is fully output.
) is latched until it operates, for example, when the suction port (2) is closed and the differential pressure disappears, the float (16)
Even if it returns to its original state, it remembers the previous value. The holding circuit (26) and display driver (27) may be a microprocessor.

Figure 6 shows a reset circuit (28) using a remote control switch (29) provided at the hand of a flexible hose (3) connected to the suction port (2) of the vacuum cleaner body (1). . A reset signal (
30) is a signal that resets the holding circuit (26) every time the local remote control switch (29) is turned on.

When the local remote control switch (29) is turned on, all contents of the holding circuit (26) are reset and the internal settings are initialized. At the same time, the relay (32) is activated by the transistor (31), the motor drive section (33) is activated, and the motor (34) of the electric blower (6) is turned on.

The float type sensor is activated by the operation of the electric blower (6).
The float (16) of (15) is connected to the dust collection filter device (1
2) A reflective photo sensor (
22) (22)... generates a signal and the holding circuit (26
), and its output signal causes the display driver (27
) of the display unit (23) through the indicator lights (24) (24).
... is lit.

At this time, even if the local remote control switch (29) is set to 0FFI, the reset signal (30) is not generated, so the holding circuit (26
) data remain unchanged. Even if the motor (34) is turned off by the remote control switch (29), the dust-clogged state is maintained and can be displayed.

In addition, the motor (
At the same time as driving the float sensor (15), the reset signal (30) is manually input from the reset circuit (28) to the holding circuit (26). The display section (23) is lit by the movement of the float (16>).

(G) Effects of the Invention Since the vacuum cleaner according to the present invention is constructed as described above, it has the following effects.

■Electric air blower for vacuum cleaner $1! (motor) from ON to OFF
When set to FF, 5m1t can be grasped.

■ Also, since the holding means is equipped with a holding circuit, the maximum amount of collected dust can be determined.

- A reset signal for the holding circuit can be given by the switch that controls ON/OFF of the electric blower.

Therefore, it is possible to provide an electric vacuum cleaner that can accurately display the amount of collected dust not only when the electric feeder is in operation but also when it is stopped.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a vacuum cleaner embodying the present invention, Fig. 2 is a sectional view of main parts of the vacuum cleaner body, Figs. 3 and 4 are perspective views and sectional views of main parts of a float type sensor, FIG. 5 is a block diagram of the electric circuit, and FIG. 6 is a motor drive circuit diagram including the reset circuit of FIG.

Claims (1)

[Scope of Claims] 1) A float type sensor that detects the pressure difference before and after the dust collecting filter device and responds to a moving float, a display means that displays the amount of collected dust based on a signal from the sensor, and the display. A vacuum cleaner comprising: a holding means for holding a display state of the means; and a switch means for applying a reset signal to the holding means. 2) The vacuum cleaner according to claim 1, wherein the switch means is a switch that performs ON/OFF control of an electric blower.