JPS5850925A - 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] This invention is for a vacuum cleaner.

Conventionally, there are vacuum cleaners in which the number of electric blowers is controlled in order to prevent the suction force from decreasing due to the 111* of the filter.

As a means of controlling the electric blower, the electric motor oII
There is a way to switch the hts, but there is a direct O40''e that allows you to change the speed in two or three stages depending on the number of 41-s, and it provides sufficient performance at 11kv%, but on the other hand, the motor itself is complicated and costs high. 0 Recently, when a semiconductor element is connected between an electric blower and a power source, a variable resistor that controls the operation of the thyristor is added to the control circuit. The method of controlling the speed of an electric blower by using a variable resistor to control the tie is becoming mainstream.Among these methods, methods in which the variable resistor is manually varied are used. The usage of the electric blower is not consistent depending on the person, and people do not always increase the suction power of the electric blower when the filter becomes clogged.There are cases where people do not know how to use it at all and even do not use it. There is a device in which a pressure detector is installed on the exhaust side of the filter in the dust collection chamber, and a detection signal from this detector is used to operate a thyristor or triator to automatically control an electric blower.

However, the means for detecting the pressure in the dust collection chamber cannot be used even in a normal cleaning state where the tip of the suction pipe gK However, the degree of negative pressure in the dust collection chamber decreases as well, making it impossible to distinguish between the two forms. In addition, the means for detecting the pressure on the exhaust side of the filter, that is, on the suction side of the electric blower room, is as described above.
Even when the inlet body is connected to the floor surface or when the filter is clogged, the degree of negative pressure is high (1), and it is difficult to distinguish between the two conditions. As a result, it is possible to correctly detect the condition where the filter is clogged, and to use the electric blower for its original purpose of increasing the suction power.
A: It has a defect.

This invention was developed based on these considerations, and the filter O! ! It is an object of the present invention to provide a vacuum cleaner that can correctly detect a clogged state and automatically control the suction force of an electric blower depending on the clogged state.

and O! The outside air sucked into the dust collector 11 is purified by a filter and then distributed to the electric blower room, but the dust collector chamber and the suction side of the electric blower are communicated through a communication path that bypasses the filter. A differential pressure detection mechanism is installed in this communication passage, and the differential pressure detection mechanism detects the pressure difference between the dust collection chamber and the suction side of the electric blower chamber, which occurs when the filter becomes clogged, and It is configured to output a signal to increase the speed of the electric blower and strengthen the suction force.

A tenth embodiment of the present invention will be explained based on l/lx diagrams to FIGS. (1) is the main body of the vacuum cleaner, and the rear part of the main body (1) is an electric blower that houses the electric blower (2).
.

A blower chamber (3) is formed, a suction port (4) is formed on the # side, and a dust collection case (6) in which a dust collection chamber (5) is formed inside 11 is detachable from the top surface in the center part. is inserted into.

This dust collection case (6) is a box-shaped 40 with an open rear surface, and the open surface has a filter frame (40) that holds a filter (η).
8) was adjourned in an airtight manner. Furthermore, the vacuum cleaner body (1) is equipped with an exhaust side of the dust collector 1m (5) and an electric blower room (3).
), the suction air passage (9) bypasses the filter (7) and connects the suction side of the filter (7).
A communication path 4 is formed which communicates the dust collection m1(5) with the dust collection m1(5). One end of this communication 11QQ is connected to the inner circumference of the suction port (4) (
IK is opened.

Next, the suction port (4) (KII water inlet hose port), the extension pipe (2), and the suction port body (2) are connected in sequence, and the connection pipe A4 provided at one end of the suction water source (2) is connected. In the external station, there is a groove (2) connecting the dust collection chamber (5) and the communication passage.
) are formed.

Therefore, the variable resistor I! is used as a pressure detection mechanism for the communication path! (To) is grained. This variable resistance! ! (b) shows a cylinder (to) in which an electric resistor and a conductor (■) are laid along the axial direction, and the electric resistor (b).
The piston (2) is fixed to the outer periphery of the piston (2), and a conductive plate, which is a conductive part that contacts the conductor, is fixed to the outer periphery m. One end of the cylinder (2) is connected to the dust collection chamber (5) K, and the other end is connected to the suction air passage (□).The piston (2) is connected to the spring 4). (9) is biased in the direction away from. 9. A guide lip (2) is formed on the inner periphery 11 of the cylinder (2), #IrI4 is formed on the outer periphery flitc of the piston (2), and □
By fitting this guide rib with O, the piston t#O
The E-ru stop is being taken care of.

Next, a 1st aGK electrical circuit will be shown. The primary side of the electric mw, the thyristor (2), and the ninth OIi resistor 4 that protects this Nyris (2) from voltage nerd; the Ndenna 4 and O series circuit are connected in parallel. Ru. At the connection between the - pole of the thyristor) and the - pole of the relay @O-, there is a relay contact
2) are connected. In addition, KJII is installed on the secondary side of the transformer relay to open and close the relay contacts.
The recorder hose (2) is connected to the Kusumine-Tosuitsuday. #ki variable resistance iiwo-pole and spa constant resistance! ! The - pole of - is connected to one pole on the next side of the transformer relay (via the electric blower (2) and the relay contact -), and these variable resistors t! The other poles of (2) and the semi-fixed resistor (a) are connected to the other pole of the primary side of the transformer relay via a resistor (b) and a capacitor (b). Further, the negative pole of the pulse generating element (to) is connected to the gate of the silice, and the other pole is connected to the resistor (2) and the capacitor shaft.

In such a configuration, turn on the remote switch
to drive the electric blower (2), but the suction body (to)
If the negative pressure at is Hl, the negative pressure in the dust collection chamber (5) is H, and the negative pressure in the suction air passage (9) is H, then the absolute value of the negative pressure is large as shown in Figure 6. As you can see, the amount of suction air decreases. The characteristic shown by the concentrated line is that the filter (7) has no eye ah, and the differential pressure between Hl and Hl is large, but the differential pressure between the peak and Hl is small and normal. On the contrary, look at the filter (7) mb
When this occurs, as shown by the broken line 4 in FIG. 8, the pressure difference between Hl and Hl becomes small, but the pressure difference between the island and the mountain becomes very hot. As a result, the piston (2) moves to the suction air passage (9) against the force of the spring 4, the electrical resistance of the variable resistor ri (2) decreases, and the capacitance of the capacitor (b) increases.
The pulse generating element outputs an output, and the thyristor) operates,
As a result, the input to the electric blower (2) increases, and the speed and suction force of the electric blower (2) increase. This results in
Even if the filter ( ) becomes clogged, it is possible to prevent the suction power from decreasing.

The change in characteristics when thyristor 4 operates is shown in FIG. 8 by a dashed line. Simply joining or separating the suction port body from the floor surface will not increase the differential pressure between Hl and the mountain. Therefore, unless the filter (7) is clogged, the electric blower (2) will not be controlled incorrectly. There is no Kotosha. When the suction port body (2) makes contact with the floor surface, the pressure increases temporarily, but under normal cleaning conditions, the suction port body is often separated from the floor surface, and the temporarily increased negative pressure H1 The electric blower (2) overheats due to interruption of the lower suction airflow. O
There is no difference.

Next, a second embodiment of the present invention will be described with reference to FIGS. 10 and 1.
Figure 1 shows the work. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, a pressure-sensitive element (b) made of a conductor, whose voltage changes with changes in negative pressure, is installed in the communication path, and the voltage change of this pressure-sensitive element (2) is reflected by a transistor (2).
(b), and adjust the trigger pulse position device by adjusting the rate of rise of the voltage of the input transistor, and operate the small current thyristor member by the output of this input transistor. Let me do this!
The triator is operated by the output of the iris register (2), so that the speed of the electric blower (2) is controlled.

As described above, the gist of this invention is to detect the difference in suction O negative pressure O between the electric blower IIO and the suction O by a differential pressure detection mechanism, and to control the small electric blower based on the electric signal at the time of detection. . Therefore, the electrical enclosure is not intended to be similar to that shown in Figures 9 and 11.

As mentioned above, the dust collection chamber and the suction side of the electric blower room are communicated through a communication path that bypasses the filter, and the differential pressure between the dust collection chamber and the suction side of the electric blower room is connected to this communication path. The differential pressure detection mechanism detects the differential pressure caused by the clogging of the filter, and detects the differential pressure caused by the clogging of the filter. The electrical detection signal increases the speed of the electric blower and strengthens the suction force, which in turn detects the abnormal state in which the filter is clogged, distinguishing it from other normal cleaning phenomena. The filter has its own effect by increasing its suction power and sucking in dust.

4. mmo simple e-explanation a Fig. 1 is a perspective view showing the 10th embodiment of the present invention, Fig. 2 is a horizontal cross-sectional view thereof, Fig. 3 WA is a horizontal cross-sectional view enlarging a portion thereof, Fig. 4 Figure 1 is an enlarged, partially cutaway perspective view of the cylinder that makes up the variable resistor, Figure 1 is an enlarged perspective view of the piston that makes up the variable resistor, and Figure 1 is an enlarged perspective view of the variable resistor. The longitudinal section is mm, the γ figure is an enlarged horizontal sectional view of the variable resistor, the s@t is a graph showing the relationship between its negative pressure and the suction air volume, the swA is its electric circuit diagram, and the 10rIA is this invention. FIG. 11 is an electric circuit diagram showing the electrical connections of the pressure sensitive element according to the second embodiment.

G...Electric blower, 3...Electric blower room, G...Dust collection room, 7...Filter, G...Suction air path, 10-...Communication path, 16...Variable resistance! ! (Differential pressure detection mechanism), 1
7-... Electric resistor, 19... Cylinder, 20...
Conductivity @ (conductivity 111),! 1... Piston, 36...
・Pressure sensitive element (differential pressure detection mechanism) Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] 1. Connect the electric blower chamber Oa containing the electric blower and the exhaust side of the dust collecting type housing the filter through a suction air passage, and and the suction air passage through a communication path that bypasses the filter, and detects the difference between the pressure of the dust collection haze and the pressure of the suction air passage to control the speed of the electric mode i. A vacuum cleaner characterized in that a differential pressure detection mechanism that emits an electrical signal is installed in the communication path. 1. A pressure-sensitive element that emits an electrical signal based on voltage fluctuations is used as a differential pressure detection mechanism.9A
9. A vacuum cleaner as set forth in item 1 of the claimed scope of the patent, characterized in that:・ 8. Inside (inside the series ν where the IK electrical resistor is installed, a piston that has a conductive part that is connected to the electrical resistor and moves due to pressure fluctuations is housed, so that electricity is generated by changing the electrical resistance value) The vacuum cleaner according to claim 1, characterized in that a variable resistor (1) is provided for generating a signal, and this variable resistor is used as a differential pressure detection mechanism.