JP2001212048A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner which is equipped with a unique electric source driving plural motors besides an electric air blower and improved to have the electric source smaller. SOLUTION: This is a circulating electric vacuum cleaner first. In a return passage where exhausted air blows back to an inhalator body from an electric air blower outlet in the vacuum cleaner body, an exhaust valve is attached in order to discharge the exhausted air passing in the return passage. A valve motor which opens and closes the valve and a cleaning body motor 67 which rotates a rotational cleaning body attached at an inhaling opening are driven by a driving electric supply circuit 97 contained in the cleaner's body. By a controlling method 96, the both motors 67 and 79 above cannot be activated simultaneously. It reduces the driving electric supply circuit's load, that is, it characteristically makes the circuit capacity and size smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation of an electric blower, in which dust on a surface to be cleaned is sucked from a suction port, the dust is captured by a filter, and air discharged from the electric blower through the filter is removed. Return to the suction port body, collect and return the returned air, circulating vacuum cleaner to clean while circulating, and the air discharged from the electric blower from the cleaner body without circulating the air as described above The present invention relates to a non-circulation type vacuum cleaner that performs cleaning while directly discharging it into the atmosphere.

[0002]

2. Description of the Related Art In a vacuum cleaner, a suction port body has a built-in motor for a suction port body such as a cleaning motor for driving a rotary cleaning body to rotate and a traveling motor for lightly moving the suction port body. In some cases, for example, a motor as a drive source of a dust removing device that recovers clogging of a dust collecting filter is built in the cleaner body. These various motors do not require a large output unlike the electric fan of the electric blower due to their functions, and a small motor is used.When a plurality of motors are provided as described above, these motors are Driven by the same drive power supply. Conventionally, the plurality of motors are driven individually or simultaneously.

However, a driving power supply capable of driving a plurality of motors at the same time requires a large driving current corresponding to simultaneous driving, and accordingly, the capacity of the power supply is large. By the way, the power supply voltage of this drive power supply device is 15V
In this case, if the drive current required to drive a plurality of motors simultaneously is 600 mA, the output power at that time can be calculated by the product of the power supply voltage and the drive current. Consume. Since the capacity of the driving power supply is large, the size of the power supply is large. Therefore, it is disadvantageous when downsizing the vacuum cleaner main body in which the driving power supply device is built.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric blower having the same drive power supply for driving a plurality of motors other than the electric motor of the electric blower. The goal is to get a vacuum cleaner that can.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention relates to a driving power supply device incorporated in a cleaner body, and a plurality of motors driven by the driving power supply device. And control means for controlling these motors, wherein the control means controls not to drive all of the plurality of motors at the same time.

[0006] In the present invention and the following invention, the plurality of motors are motors incorporated in a suction opening body, a cleaner body, or the like, in addition to the electric motor of the electric blower. Further, in the present invention and the following invention, when a plurality of motors are three or more, each motor can be separately driven at a different time, and some motors are simultaneously driven. These and the remaining motors can be driven separately at different times. In addition, the present invention can be applied to various types of circulating vacuum cleaners such as canister type, upright type, and handy type or non-circulating vacuum cleaners.

According to the first aspect of the present invention, since the control means controls not to drive all of the plurality of motors at the same time, the load applied to one driving power supply device which is a common power supply for the plurality of motors is: At the maximum, the load becomes smaller than when each motor is driven at the same time, whereby the capacity of the driving power supply device can be reduced.

According to a second aspect of the present invention, the operation of the electric blower sucks dust on the surface to be cleaned from the suction opening, captures the dust with a filter, and removes air discharged from the electric blower through the filter. It is assumed that a circulation-type vacuum cleaner which returns to the suction port body, collects the returned air, and performs cleaning while circulating the returned air is used.

[0009] In order to solve the above-mentioned problems, a cleaner main body in which the electric blower and the filter are accommodated, and a return air passage through which exhaust air discharged from the electric blower and returned to the suction opening body passes. An exhaust valve that has a valve motor, performs an opening / closing operation by the motor, and discharges exhaust air passing through the return air passage by the opening operation, and a suction port body provided in the suction port body. A motor, a driving power supply device built in the cleaner body and used as a common power supply for the valve motor and the suction port motor, controlling the valve motor and the suction port motor, and both these motors And control means for controlling not to drive all of them at the same time.

In the present invention, when a rotary cleaning body is incorporated in the suction port body, a cleaning motor for rotating the cleaning body can be used in the motor for the suction port body. Various motors mounted on the suction port body, such as a self-propelled motor for running, can be used.

In the second aspect of the present invention, when the exhaust valve provided in the return air passage is opened by the operation of the valve motor, the exhaust air flowing through the return air passage through this valve is returned to the return air passage. The air flows out, and this outflow air is eventually released into the atmosphere outside the cleaner body, so that the amount of air sucked from outside the suction opening body can be increased. The valve motor of the exhaust valve and the motor for the suction port provided on the suction port are driven by power supply from the same driving power supply device, but in their driving, the control means does not drive both motors simultaneously. Control. In other words, the control means controls the suction port body motor not to be driven when the valve motor is driven, and controls the valve motor not to be driven when the suction port body motor is driven.
As described above, since the control means controls the valve motor and the suction port motor not to be driven simultaneously, the load applied to one driving power supply device, which is a common power supply for these two motors, can be simultaneously controlled at the maximum. It becomes smaller than the load when driven, whereby the capacity of the driving power supply device can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

1 to 3, reference numeral 1 denotes a pair of wheels 2.
And a cleaner body that can be freely moved on the surface to be cleaned by a turning wheel (not shown). The cleaner body 1 has a dust suction port 3 provided at a front portion thereof and one end of a dust suction communication pipe 6 having a flexible dust suction hose 4 and an inflexible dust suction pipe 5, that is, a dust suction hose 4. The suction pipe 8 is connected to the other end of the communication pipe 6, that is, the dust suction pipe 5. Although not shown, air exhausted from an electric blower, which will be described later,
It is guided so as not to mix with the dust-absorbing air.

At the front of the cleaner main body 1 formed by combining a plurality of synthetic resin case members, a dust collection chamber 11 having an upper opening is formed, and a downstream side of the dust collection chamber 11 is formed. At the rear of the cleaner body 1 located at
Are formed. A dust collection bag 13 (see FIG. 1) as a filter is housed in the dust collection chamber 11 so as to be able to be taken in and out, and a rear filter unit 14 (see FIG. 3) for supporting a rear surface portion of the bag 13 has a blower room. It is arranged close to the 12 side. As shown in FIG. 1, the upper opening of the dust collection chamber 11 is airtightly closed by a case cover 15 which can be opened and closed. The dust bag 13 can be arbitrarily attached and detached through the upper surface of the dust chamber 11, and the unit 14 can be removed as needed. 2 and 3, reference numeral 13a denotes a cardboard mouth frame of the dust collecting bag 13. Although not shown, the mouth frame 13a actually passes through an opening communicating with the dust suction port 3 through the center.

As shown in FIG. 3, a rubber packing 16 is fitted and attached to the dust suction port 3 formed on the front wall of the dust collection chamber 11. And a seal portion protruding toward the dust collection chamber 11 side.

The mouth frame 13a comes into contact with the seal portion so as to achieve a sealing property therebetween. In FIG. 3, reference numeral 10 denotes a downwardly mounted shaft integrally projecting from the bottom wall of the cleaner body 1, to which the above-mentioned turning wheel (not shown) is mounted.

A blower unit 21 is built in the blower room 12 in which the wheels 2 are rotatably mounted on the outer surfaces of both sides. The unit 21 includes an electric blower 22, an electric blower cover 23, and a cord reel device 24, as shown in FIGS.

The electric blower 22 includes a motor section 22a and a fan section 22b including a centrifugal fan (not shown) driven by the motor section 22a and a fan cover for covering the same. The electric blower 22 is provided, for example, in a horizontal position with the fan unit 22b facing the dust collection chamber 11. An intake port 25 (see FIG. 4) is opened at one end face of the electric blower 22, that is, at the center of the fan cover.
A plurality of air discharge portions 26 are provided at intervals in the circumferential direction on the end peripheral surface on the side opposite to the fan portion 22b in FIG.
Reference numeral 27 in FIGS. 3 and 5 denotes a short cylindrical supported projection projected from the center of the end wall of the motor portion 22a.

As shown in FIGS. 3 to 5, the electric blower cover 23 made of synthetic resin is provided on the first case body 3 disposed on the front side.
1 and the second case body 32 disposed on the rear side are formed by connecting at a plurality of places by screwing (not shown). The first case body 31 includes an inner cylindrical portion 31a as long as the entire length of the electric blower 22, an outer cylindrical portion 31b shorter than the cylindrical portion 31a, and both cylindrical portions 31a, 31b.
And an end wall 31c integrally connected. Inner cylindrical part 3
The opening on the side of the end wall 31c of 1a is used as an inlet 30 for exposing a portion of the air inlet 25 of the electric blower 22.

The opening edge of the outer cylindrical portion 31b opposite to the end wall 31c has an annular fitting groove which fits over the opening edge of the second case body 32, and It is connected to. A dish-shaped bracket portion 31d is provided integrally with a plurality of bridge portions 31e (only one is shown in FIG. 4) extending inward on the side opposite to the entrance 30 of the inner cylindrical portion 31a. A ventilation section 31 is provided between each bridge section 31e.
f (only one is shown in FIG. 4).

The first case body 31 includes an electric blower 22.
Is housed. That is, the support rubber 33 is fitted on the supported convex portion 27 of the electric blower 22, and the annular support rubber 35 that exposes the intake port 25 is also fitted on the fan portion 22 b. The support rubber 35 is covered over the peripheral portion and the peripheral surface of the end surface of the fan portion 22b. Then, the supported convex portion 27 covered by the support rubber 33 is fitted and supported in the bracket portion 31d, and the support rubber 35 is inserted into the inlet 30 of the inner cylindrical portion 31a to support the fan portion 22b. Electric blower 2
2 is mounted in the first case body 31 in a vibration-proof manner.
In this built-in state, the outer peripheral portion of the support rubber 35 that does not block the intake port 25 overlaps with the inner peripheral portion of the end wall 31c.

The second case body 32 includes the inner cylindrical portion 31
The end wall 32b is integrally provided at one end of a stepped cylindrical portion 32a which covers a from the outer peripheral side, and a reel support shaft 34 protruding outward is formed integrally on an outer surface of a central portion of the end wall 32b. Have been.

As shown in FIGS. 3 and 4, the code reel device 24 includes a code reel 41 provided with upright annular flanges at both ends of a winding drum. Base wall 4 integrally provided inside
And 2. The code reel 41 and the base wall 42 form a concave portion 43 for accommodating the second case body 32. In the winding groove of the cord reel 41, a plug 44a (see FIG.
Shown in ) Is wound around the power cord 44 (see FIG. 2). A disc 45 is attached to the base wall 42 in close proximity to the end wall 32b, and a spiral spring 46 for rewinding is provided between the disc 45 and the base wall 42 (see FIG. 4).
Is arranged.

Each of the base wall 42 and the disc 45 is rotatably supported by the reel support shaft 34, whereby
One end of the cord reel device 24 is supported by the electric blower cover 23 in a state where the rear portion of the electric blower cover 23, that is, the second case body 32 is accommodated in the recess 43. In this installation, the center end of the spiral spring 46 is connected to the reel support shaft 34, and the outer end is connected to the base wall 42 and the like.

A slip ring mechanism (not shown) electrically connected to the power cord 44 is formed between the disk 45 and the end wall 32b.
2 is supplied. Reference numeral 47 in FIGS. 2 to 5 denotes a stopper that is non-rotatably connected to the tip of the support shaft 34, and prevents the code reel device 24 from coming off the reel support shaft 34.

A gap is provided between the cylindrical portion 32a of the second case body 32 and the open end side of the code reel 41 covering the cylindrical portion 32a, that is, the code reel device 24.
The end opposite to the base wall 42 is rotatably supported via a plurality of rollers (not shown) attached to the outer periphery of the second case body 32. Therefore, the cord reel device 24 is arranged in series with the electric blower 22 while sharing the same axis. In FIG. 5, reference numeral 1 b denotes partition ribs provided on the inner surface of the cleaner main body 1 so as to individually oppose the peripheral surfaces of both flanges of the code reel 41, and between these ribs 1 b and the flange of the code reel 41. Are each formed with an annular gap g.

The blower unit 21 having the above-described structure is inserted into the blower room 12 through various ribs provided in the cleaner main body 1 (only three kinds of ribs are denoted by reference numerals 55 to 58 in FIG. 3). The support is fixed. The rib 55 is engaged with the outer periphery of the first case body 31 to perform positioning and support, and the rib 58 is provided on the suction guide wall between the dust collection chamber 11 and the blower chamber 12 so as to be on the front surface of the support rubber 35. The ribs 57 are engaged with each other to perform positioning and support, and the ribs 57 support the above-mentioned stoppers 47 which are hooked on the grooves thereof to perform positioning. The ribs 56 are provided at intervals so as to allow the exhaust air discharged from the exhaust valve 71 described later to flow toward the gap g.

The power cord 44 is connected to the cord port 1a (FIG. 1).
And 6). The cord opening 1 a is provided between the two flanges of the cord reel 41 and is provided laterally in an upper portion at the rear of the cleaner body 1. This cord opening 1a is provided with a power cord 4
In a state in which the blower 4 is pulled out, the plug 4a is not blocked by the plug 44a, and is used as an exhaust port that allows the air in the blower chamber 12 to be released into the atmosphere. 6a in FIG.
Is a cover portion of the cleaner body 1 provided in an eaves shape with respect to the cord opening 1a, and 52 is a cord opening protecting member for receiving the insertion plug 44a. The cover part 51a is formed on a cover member 51 attached as a part of the main body 1 to the rear upper surface of the main body 1 of the cleaner. Cord protection member 5
2 has a cord through-hole communicating with the cord opening 1a,
The cord opening protecting member 52 has a size that allows a finger to be inserted into the inside of the cord opening protecting member 52 so that the insertion plug 44a can be grasped and pulled out from both sides in the width direction.

Further, the electric blower cover 23 has an outlet 61 for leading out the air inside. As shown in FIG. 2, the outlet 61 is provided at a position corresponding to the outer periphery of the fan portion 22b, that is, at a part of the outer cylindrical portion 31b of the first case body 31 so as to protrude outward. One end of a return air path member 62 is connected to the outlet 61. The return air passage member 62 is arranged so as to bypass one side of the dust collection chamber 11, and the other end is connected to the dust suction port 3.

The electric blower cover 23 which forms a part of a return air path for returning the exhaust air discharged from the electric blower 22 to the suction opening 8 penetrates the wall of the cover 23 and is shown in FIGS. The illustrated exhaust valve 71 is attached. The exhaust valve 71 includes a valve unit and a drive unit that opens and closes the valve unit.

The valve unit has a valve housing 72 formed by combining a first housing and a second housing. The valve housing 72 is fastened together with the driving unit holder 73 by fastening a plurality of screws 74 together. It is attached to the exhaust valve attachment portion of the electric blower cover 23.
The valve housing 72 communicates with the inside of the electric blower cover 23a through an opening (not shown). The second housing of the valve housing 72 has a valve hole 75. The valve housing 72 is provided with a valve shaft 77 having a valve body 76 for opening and closing a valve hole 75 attached thereto and movable in the axial direction, and a spring 78 for constantly biasing the valve shaft 77 toward the second housing. Each is built-in. The urging force of the spring 78 causes the valve body 76 to normally close the valve hole 75. As shown in FIG. 6, the drive unit holder 73 is provided with openings 73a, and the inside of the drive unit holder 73 and the inside of the blower chamber 12 are communicated through these openings 73a. Therefore, when the valve hole 75 is opened, the inside of the electric blower cover 2
3a and the inside of the blower room 12 are connected.

The drive section is formed by a valve motor 79 mounted on the outer surface of the drive section holder 73 and a cam 80 fixed to a motor shaft 79a inserted into the drive section holder 73 of the motor 79. I have. The valve motor 79 is composed of a small motor that consumes much less power than the electric blower 22, for example, a stepping motor. Also, the cam 80
Is moved in and out of the valve shaft 77 inserted into the drive unit holder 73 through the valve hole 75 to move the valve shaft 77 in the axial direction.

The exhaust valve 71 having the above structure is connected to the cord port 1a.
It is arranged on the front side (dust collection chamber 11 side). Moreover, when the cleaner main body 1 is viewed from the rear, as shown in FIG. 6, the exhaust valve 71 is disposed on the lower right side of the cleaner main body 1, and the cord port 1a is disposed on the upper left side of the cleaner main body 1. ing.
With such an arrangement, the cord port 1a and the exhaust valve 71 are provided in a positional relationship such that the cord reel 41 of the cord reel device 24 is substantially sandwiched from the radial direction.

The dust suction hose 4 is, for example, a double pipe having a coaxial structure, and the dust suction air sucked by the suction port 8 is passed through an air passage formed in the inner space of the bellows-shaped inner pipe. The exhaust gas guided from the return air passage member 62 is passed through an annular air passage formed between the inner tube and the bellows-shaped outer tube. A connection cylinder 64 having a handle 63 which is formed in a rectangular shape and protrudes upward is provided at the tip of the dust suction hose 4.

The handle 63 is provided with an operation section 60 having a plurality of control switches (see FIG. 1) 63a to 63b. The control switch 63a is used for instructing the start and stop of the operation of the electric blower 22, the control switch 63b is used for opening and closing the exhaust valve 71, and the control switch 63c is used for starting and operating the cleaning body motor described later. Used to indicate a stop. Each of the control switches 63a to 63c is a push button switch that repeats on / off each time the pressing is repeated.

As shown in FIG. 1, the dust suction pipe 5 detachably connected to the connecting cylinder 64 is composed of a first pipe 5a and a second pipe 5b which can be detached from each other. These pipes 5
a and 5b each include an inner tube and an outer tube having a coaxial structure made of a synthetic resin hard tube, and a ventilation path inside the inner tube is communicated with the inner tube of the dust suction hose 4, An annular ventilation path (return air path) between both pipes is communicated with an annular path (return air path) of the dust suction hose 4.

The suction port 8 detachably connected to the tip of the dust suction pipe 5 has a connection pipe 65 for connecting to the dust suction pipe 5, and a suction opening ( (Not shown). The suction opening 8 has a built-in rotary cleaning body 66 that faces the suction opening and partially protrudes from the suction opening. The cleaning body that rotates and drives the rotary cleaning body 66 as a motor for the suction opening body. The motor 67 is built in. The motor 67 is a small motor that consumes much less power than the electric blower 22. This cleaning body motor 67
The power is supplied to the dust suction pipe 5 via an electric wire (not shown) provided along the axial direction of the dust suction pipe 5.

The inside of the suction opening 8 has a return air passage which guides and returns the exhaust air from the electric blower 22 introduced into the suction opening to the suction opening, and this air passage is partitioned from the suction opening. A collection air path is formed for sucking dust on the surface to be cleaned and for sucking and collecting the exhaust gas returned to the suction opening. The return air passage communicates with the annular air passage of the dust suction pipe 5, and the recovery air passage communicates with the air passage inside the inner pipe of the dust suction pipe 5.

As shown in the electric circuit of FIG. 8, the first switching means 91 and the motor section 22 of the electric blower 22 are provided.
The electric motor 92a and a triac 93 having a gate electrode and a semiconductor current control element as an input adjusting means for the electric motor 92 are connected in series, and this series circuit is connected to a commercial AC power supply 94. Control means 96 such as a microcomputer is connected to a control power supply circuit 95 for generating a control power supply having a power supply voltage of 5 V from a commercial AC power supply 94. This means 96 opens and closes the first switching means 91 and controls the conduction angle of the triac 93 to control the magnitude of the input applied to the electric motor 92.

Power is supplied to the cleaning body motor 67 via a second switching means 98 to a driving power supply circuit 97 serving as a driving power supply for generating a driving power supply having a power supply voltage of 15 V from a commercial AC power supply 94. A first drive circuit and a second drive circuit for supplying power to the valve motor 79 via third switching means 99 are connected in parallel. Second,
The control means 96 for controlling the opening and closing of the third switching means 98 and 99 respectively includes the second and third switching means 9 so that the motors 67 and 79 are not driven simultaneously.
The drive of both motors 67, 79 is controlled via 8, 99.

That is, the control means 96 turns on the third switching means 99 and turns off the valve motor 7 when the second switching means 98 is turned off and the cleaning motor 67 is stopped.
9 and a second control state in which, when the second switching means 98 is turned on to drive the cleaning body motor 67, the third switching means 99 is turned off and the valve motor 79 is stopped. , The driving of both motors 67 and 79 is controlled.

The input terminals of the control means 96 are connected to the control switches 63a to 63c. When the control switch 63a is turned on, the control means 96
The first switching means 91 is turned off to supply electric power to the electric motor 92 of the electric blower 22. In this case, in a normal operation, the input to the electric motor 92 is set to about 200 W so as to be suitable for the complete circulation type cleaning. The conduction angle of the triac 93 is controlled so as to limit the angle to a low level. When the control switch 63c is turned on under the normal operation, the control means 96 turns on the second switching means 98 to energize the cleaning body motor 67.

In any of the above states, when the control switch 63b is turned on, the control means 96
Turns on the third switching means 99 to turn on the valve motor 79.
, The exhaust valve 71 is opened, and at the same time, the input of the electric blower 22 to the
The conduction angle of the triac 93 is controlled so as to be as large as 0 W to 500 W. Note that when the control switch 63b is turned on while the cleaning body motor 79 is being driven, the control means 96 performs control that gives priority to driving the valve motor 79.
Of course, when the control switch 63b is turned off, the control means 96 causes the exhaust valve 71 to close by, for example, reversing the valve motor 79, and at the same time, the triac 93 so that the input to the electric motor 92 drops to about 200W. Is controlled.

In FIG. 8, reference numeral 100 denotes a detecting means inserted in the second drive circuit for the valve motor 79, which is the second drive circuit.
Detects energization of the drive circuit. The detection output of the detection means 100 is supplied to the control means 96, and the control means 96 activates a timer (not shown) of the detection means 100 and supplies a predetermined time (a short time of about 2 seconds) to the timer. Is elapsed, the third switching means 99 is turned off and the valve motor 79 is stopped. In addition, at this time, the control unit 96 turns on the control switch 63b as described above while the cleaning body motor 67 is driving. Accordingly, as described above, the third switching means 9
9 is switched from on to off, and at the same time, the second switching means 98 which has been turned off is turned on to restart the operation of the cleaning body motor 67. By repeating the driving of the valve motor 79 with the repeated pressing of the control switch 63b, the cam 80 presses the valve shaft 77 to the maximum extent to open the exhaust valve 71, and the cam 80 moves the valve shaft 77 And the state in which the exhaust valve 71 is closed by the force of the spring 78 is alternately selected.

The air circulation type vacuum cleaner having the above-described structure is used by pressing the control switch 63a with the power cord 44 pulled out and connected to an outlet. As a result, the electric motor 92 of the electric blower 22 is energized,
Since the electric blower 22 is driven, the electric blower 22
, The dust collecting chamber 11 becomes negative pressure. As a result, the air in the suction opening portion of the suction opening body 8 passes through the inner pipe of the communication pipe 6 as shown by the dotted arrow in FIG.
The dust is sucked into the dust collection bag 13 in the inside 1, and the dust contained in the suction airflow is removed by the dust collection bag 13.

The air sucked as described above is
After passing through the fan section 22b of the electric blower 22 disposed downstream of the dust collection chamber 11, the motor section 22a
Is discharged into the electric blower cover 23 from the air discharge portion 26 of the air blower. The air discharged into the electric blower cover 23 bypasses the inner cylindrical portion 31a of the first case body 31 of the electric blower cover 23 as shown by an arrow in FIG. After flowing into the inside of the body 31, it is discharged to the outside of the electric blower cover 23 through the outlet 61.

Further, the exhaust gas thus led out of the cover 23 passes through the dust suction port 3 from the return air passage member 62,
It is returned to the suction opening of the suction opening 8 through the annular ventilation path of the communication pipe 6. The flow of the exhaust is shown by solid arrows in FIG. Then, the returned exhaust gas is again sucked into the dust collecting chamber 11 along the path shown by the dotted arrow in FIG. 1 and circulated. Further, in such an air circulation, by operating the cleaning body motor 67 as necessary by operating the control switch 63c to rotate the rotating cleaning body 66, dust existing between the hairs of the carpet can be sucked out while being scraped out. it can.

As described above, the exhaust air from the electric blower 22 is returned to the suction opening 8 without being directly discharged from the cleaner body 1 to the atmosphere, and is completely circulated while being sucked. The dust coming from the suction opening is carried and removed by the dust collection bag 13 in the intake air passage, so that the air circulation cleaning can be performed. According to such cleaning,
The driving sound of the electric blower 22 is suppressed from leaking to the outside, so that the cleaning can be performed quietly, and at the same time, while the surface to be cleaned is prevented from sticking to the suction opening, the suction opening 8 is moved slightly with respect to the surface to be cleaned. Can be cleaned.

In the above-mentioned circulating cleaning, when a corner such as a wall in a room is to be cleaned, the control switch 63b may be pressed. Then, the control means 96 drives the valve motor 79 and increases the conduction angle of the triac 93, so that the valve shaft 77 of the exhaust valve 71 is pressed and moved by the cam 80 against the urging force of the spring 78, and this exhaust is performed. Valve 7
As soon as 1 is opened, the input to the electric blower 22 is increased from 200 W during normal operation to 400 W to 500 W.

As a result, the amount of wind blown by the electric blower 22 increases, whereby the circulating air flows from the electric blower cover 23 which forms a part of the return air passage close to the electric blower 22 as described above. It is discharged outside, that is, into the blower room 12 of the cleaner body 1 through the exhaust valve 71. An arrow in FIG. 6 indicates an airflow passing through the exhaust valve 71. In this case, since the resistance of the return air passage from the electric blower cover 23 to the suction opening body 9 is large, much of the outflow air discharged from the electric blower 22 is discharged to the blower chamber 12 and has a higher resistance than the return air passage. The air is discharged from the cord opening 1a of the cleaner body 1 into the atmosphere through an outflow air passage having a small amount of air. It should be noted that a part of the air is circulated irrespective of the exhaust to such release to the atmosphere.

As the amount and speed of the exhaust air circulating in the suction opening 8 are increased, the suction force of the suction opening 8 is increased, so that not only the portion where the suction opening of the suction opening 8 is opposed but also the portion where the suction opening is opposed. The dust around the suction opening body can also be sucked. That is, in this use state, a use form similar to that of a normal non-circulation type vacuum cleaner can be obtained. Therefore, it is possible to perform cleaning by sucking dust at corners of the wall or the like while performing the air circulation type cleaning.

For the same reason, instead of the suction port 8 shown in FIG. 1, a suction port (not shown) composed of a gap nozzle is attached to the end of the communication pipe 6, and a groove such as a wall or an aluminum sash is provided. Can also be cleaned with a strong suction force. As described above, cleaning as a complete circulation type vacuum cleaner and cleaning similar to a normal non-circulation type vacuum cleaner can be selectively used depending on a cleaning place by turning on / off the control switch 63b. Easy to use.

Further, under the use condition in which the input to the electric blower 22 is increased as described above, the increase in the input increases the heat generation of the electric blower 22 and the power cord 44 of the cord reel device 24. However, the temperature of the cleaner body 1 does not become higher than the predetermined temperature.

That is, the exhaust air discharged from the exhaust valve 71 opened as described above into the blower chamber 12 is collected by the rib 1b in the cleaner body 1 and the cord reel 41b whose tip is opposed to the rib 1b. After flowing between the two flanges of the cord reel 41b through a gap g formed between the flange on the dust chamber 11 side, the cord port provided in the cleaner body 1 communicates between the flanges. It is released to the atmosphere through 1a. By releasing much of the discharged air immediately after being heated through the electric blower 22 into the atmosphere in this way, the heat generated by the electric blower 22 can be effectively released into the atmosphere. In addition, since cold outside air can be sucked from the suction port body 8 as described above, the temperature itself of the air sucked into the electric blower can be reduced. Therefore, the synthetic resin vacuum cleaner main body 1 is irrespective of the increase in input as described above.
Temperature can be prevented from rising too high.

Further, as described above, the outflow air flowing toward the cord port 1a discharged from the exhaust valve 71 flows between the two flanges of the cord reel 41 around which the power cord 44 is wound in the outflow air passage. Since the exhaust valve 71 and the lead port 1a which circulate and are located at the beginning and end of the outflow air passage are provided so as to substantially sandwich the cord reel device 24 from the radial direction, the exhaust air is exhausted. The outflow air flowing toward the lead port 1a through the valve 71 flows along the entire circumference of the cord reel device 24. Therefore, the power input 44
Although the heat generation of the power cord 44 is increasing, the power cord 44 can be efficiently cooled, and the heat of the power cord 44 does not cause the temperature of the cleaner body 1 to become higher than a predetermined temperature.

In the above-mentioned circulation cleaning, the cleaning motor 6 driven by the same driving power supply circuit 97 is used.
7 and the valve motor 79 are selectively operated by the control means 96 when the corresponding control switch 63b or 63c is operated.

That is, when the second control switch 63b is operated to open the exhaust valve 71, the control means 96 selects the first control state described above, and similarly, the second control state is selected to close the exhaust valve 71. When the control switch 63b is operated,
The control means 96 selects the first control state described above. In these cases, the second switching means 98 is turned off, so that the cleaning body motor 67 is not driven. Therefore, when the cleaning body motor 67 is in the driving state, the motor 67 is stopped. . At the same time, the third switching means 99 is turned on and the valve motor 79 is driven. Further, in order to rotationally drive the rotary cleaning body 66, a third control switch 6 is provided.
When 3c is operated, the control means 96 selects the above-described second control state, so that the second switching means 98 is turned on to drive the cleaning body motor 67, and at the same time, the third switching means 99 is turned off. To prevent the valve motor 79 from being driven.

As described above, the control means 96 controls the cleaning motor 67 and the valve motor 79 of the exhaust valve 71 which are driven by the same power supply circuit 97 so as not to be driven simultaneously. The drive current of the circuit 97 can be reduced to, for example, 400 mA. Thus, the power consumption of the power supply circuit 97 can be reduced to 400 mA × 15 V = 6 W. Therefore, as the capacity of the driving power supply circuit 97 can be reduced, the size of the circuit 97 can also be reduced. Thus, when the size of the cleaner main body 1 is reduced, the driving power supply circuit 97 built in the main body 1 can be prevented from hindering the reduction in size.

Further, since the driving time of the valve motor 79 is completed in a short time of several seconds, even if the cleaning body motor 67 is rotationally driven before that, the driving interruption time of the body motor 67 is very short and several seconds. Later, since the state returns to the second control state and the rotation of the rotary cleaning body 67 is restarted, there is no practical problem. In this case, the driving is restarted by a timer which is started from the time when the detection output of the detection means 100 is inputted to the control means 96. At the same time as the time is up, the control means 96 selects the second control state and automatically. Done. Therefore, the user operates the control switch 63b and then drives the cleaning body motor 67 again.
Since there is no need to press the control switch 63c, it is easy to use.

[0060]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, in the electric vacuum cleaner having the same driving power supply unit for driving a plurality of motors other than the electric blower, the control means controls the plurality of motors not to be driven at the same time. Therefore, it is possible to provide an electric vacuum cleaner capable of reducing the size of the power supply device as the capacity of the drive power supply device can be reduced.

According to the second aspect of the present invention, the motor for the suction port provided in the suction port and the valve motor for the exhaust valve provided for cooling the electric blower and improving the suction performance are driven. In the circulation type vacuum cleaner having the same driving power supply device, since the control means controls the two motors so as not to be driven simultaneously, the capacity of the driving power supply device can be reduced. It is possible to provide a circulating vacuum cleaner that can be easily operated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a part of the cleaner main body of the electric vacuum cleaner shown in FIG. 1 together with built-in components.

FIG. 3 is a perspective view showing a vacuum cleaner main body of the electric vacuum cleaner shown in FIG.

FIG. 4 is an exemplary perspective view showing a cross section of a blower unit included in the electric vacuum cleaner shown in FIG. 1;

FIG. 5 is a vertical sectional side view showing a rear portion of the electric vacuum cleaner shown in FIG. 1;

FIG. 6 is a sectional view taken along the line ZZ in FIG. 5;

FIG. 7 is an exemplary perspective view showing a cross section of an exhaust valve provided in the vacuum cleaner shown in FIG.

FIG. 8 is a block diagram showing a circuit configuration of the vacuum cleaner shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner main body 8 ... Suction opening body 13 ... Dust collection bag (filter) 22 ... Electric blower 60 ... Operation part 63a-63c ... Control switch 66 ... Rotary cleaning body 67 ... Cleaning body motor (motor for suction opening body) 71 ... Exhaust valve 79 ... Valve motor 96 ... Control means 97 ... Drive power supply circuit (drive power supply) 98 ... Switching means 99 ... Switching means 100 ... Detection means

Claims (2)

[Claims] 1. A driving power supply device incorporated in a cleaner body, a plurality of motors driven by the driving power supply device, and control means for controlling these motors, wherein the control means comprises A vacuum cleaner characterized by controlling not to drive all of the motors simultaneously. 2. The operation of the electric blower sucks dust on the surface to be cleaned from the suction port body, catches the dust with a filter, and passes air discharged from the electric blower through the filter to the suction port body. In a circulation type vacuum cleaner for cleaning while returning and circulating the returned air, a cleaner body in which the electric blower and the filter are housed, and the suction port body discharged from the electric blower An exhaust valve is provided in a return air passage through which exhaust air returns, and has a valve motor, performs an opening and closing operation by the motor, and discharges exhaust air passing through the return air passage by opening the opening valve. A motor for the suction port body provided in the suction port body, and a driving power supply device incorporated in the cleaner body and used as a common power supply for the valve motor and the motor for the suction port body. , Controls the valve motor and inlet-body motor, and,
Control means for controlling not to drive all of these two motors at the same time; and a circulation-type vacuum cleaner.