JP2002045312A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation type vacuum cleaner capable of variably controlling a quantity of exhaust air discharged from an exhaust air opening with a simple constitution. SOLUTION: The passage body of an exhaust air passage which circulates exhaust air from a motor-driven blower 14 is provided at an air suction side of the motor-driven blower 14 to which a hose is to be connected. In the exhaust air passage which opens the exhaust air opening to discharge exhaust air, an exhaust-air quantity controlling means 55 which is opened and closed by moving an opening/closing valve with a motor 57 is provided. An on-off switch SW1 is closed in the state that the opening/closing valve blocks the exhaust air passage, and an on-off switch SW2 which is closed in the state that exhaust air is discharged by opening the exhaust air passage are provided. In a cleaning mode circulating exhaust air, the motor 57 is rotated until the on-off switch SW1 which is closed by a switching means 135 controlled by a control means 121. In a cleaning mode discharging exhaust air, the motor 57 is rotated until the on-off switch SW2 is closed by the switching means 125 controlled by the control means 121. The quantity of exhaust air can be varied with a simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner for exhausting at least a part of exhaust air circulating from an exhaust side of an electric blower to an intake side via a circulation air path through an exhaust air path. .

[0002]

2. Description of the Related Art Conventionally, as a vacuum cleaner for circulating exhaust air from an electric blower to an intake side, for example, Japanese Utility Model Publication No. 39-365.
A configuration described in Japanese Patent Publication No. 53 is known.

[0003] The vacuum cleaner described in Japanese Utility Model Publication No. 39-36553 discloses a connecting pipe having a double pipe structure of a suction port body, which sucks dust sucked together with air from a suction port of the suction port body into the suction chamber. The dust is collected in the dust collecting chamber of the vacuum cleaner main body through the extension pipe of the double pipe structure connected to the connecting pipe and the inner pipe of the double hose of the double pipe structure. In addition, the air exhausted after dust is separated and removed in the dust collection chamber and sucked into the electric blower,
It blows out from the outlet opening near the inlet through the outer pipe, extension pipe, and connecting pipe of the double hose. The exhaust air blown out from the outlet blows up dust on the floor surface, and the exhaust wind blown out together with the blown-up dust is sucked in from the inlet and circulated, thereby generating discomfort and noise due to exhausting to the outside air. , To prevent the suction port body from sticking to the floor surface and reducing the operability by increasing the negative pressure with respect to the atmospheric pressure of the lower surface that opens the suction port, and to improve the cleaning environment and cleaning workability. Has been adopted.

[0004]

However, in the circulating vacuum cleaner described in Japanese Utility Model Publication No. 39-36553, the exhaust air circulates, so that the lower surface of the suction port body has a negative pressure relative to the atmospheric pressure. In some cases, dust on the floor positioned around the suction opening may not be sucked, and for example, there is a possibility that dust located near a wall or the like can hardly be sucked.

[0005] Therefore, a part of the exhaust air is exhausted from the exhaust port opened in the cleaner body, and the area of the suction port is formed to have a negative pressure with respect to the atmospheric pressure, and is located around the suction port body. A configuration is conceivable in which dust on the floor or dust that has entered the root of the carpet hair can be absorbed.

[0006] Here, if a part of the exhaust air is constantly exhausted, there is a possibility that the above-mentioned exhaust may cause discomfort or noise, and the operability may be deteriorated due to the suction port sticking to the floor surface. Therefore, only in the case of the cleaning mode in which the lower surface of the suction port body is set to a negative pressure with respect to the atmospheric pressure to increase the dust suction force, it is necessary to adopt a configuration in which a part of the exhaust air is exhausted by setting operation appropriately.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a circulating vacuum cleaner having a simple structure and capable of changing the amount of exhaust air exhausted from an exhaust port.

[0008]

According to a first aspect of the present invention, there is provided an electric vacuum cleaner having a main body case having a main body suction port for accommodating an electric blower and communicating with an intake side of the electric blower; A circulation air passage communicating the exhaust side of the electric blower with the intake side, an exhaust port provided in the main body case and communicating with the exhaust side of the electric blower and opening, an on-off valve, a motor for operating the on-off valve, and An opening / closing detection unit having an on / off switch for detecting the open / closed state of the on / off valve, and an exhaust air volume control unit for controlling an exhaust air volume from the exhaust port.

An opening / closing valve is actuated by driving the electric motor in a main body case having a circulation air passage for communicating the exhaust side of the electric air blower with the intake side and an exhaust port for exhausting the exhaust air from the electric air blower to the outside. By providing the exhaust air volume control means for controlling the exhaust air volume by detecting the open / close state of the on / off valve with open / close detection means having an on / off switch, it is possible to control not only the desired circulation air volume but also the open / close state of the on / off valve. Since it can be mechanically detected by the on / off switch of the open / close detection means, compared to a configuration in which the current value of the motor is detected and the open / closed state is electrically detected by a change in the current value,
It is not necessary to consider variations due to the characteristics of the individual motors, and it is possible to respond even when using motors with different ratings, so that variable control of the exhaust air volume becomes easy.

According to a second aspect of the present invention, there is provided an electric vacuum cleaner, which accommodates an electric blower and has a main body suction communicating with an intake side of the electric blower, and an exhaust side of the electric blower provided in the main body case. A circulation air passage communicating with the electric blower, an exhaust port provided in the main body case to communicate with an exhaust side of the electric blower, and an opening / closing valve, a motor for operating the opening / closing valve, and an operation of the opening / closing valve. A variable resistor whose resistance value changes in conjunction therewith, an open / close detecting means for detecting an open / close state of the open / close valve, and an exhaust air volume control means for controlling an exhaust air volume from the exhaust port. is there.

An opening / closing valve is operated by driving the motor in a main body case having a circulation air passage for communicating the exhaust side of the electric blower with the intake side and an exhaust port for exhausting exhaust air from the electric blower to the outside. By providing the exhaust air volume control means for controlling the exhaust air volume by detecting the open / close state of the on / off valve with the open / close detection means having a variable resistor, not only can the desired circulation air volume be controlled, but also the open / close state of the on / off valve Can be detected by the variable resistor of the opening / closing detecting means, so that the variation caused by the characteristics of the individual motors can be reduced compared to a configuration in which the current value of the motor is detected and the opening / closing state is detected based on a change in the current value. Since there is no need to take this into account and it is possible to use a motor with a different rating, variable control of the exhaust air volume is facilitated.

According to a third aspect of the present invention, in the vacuum cleaner of the first or second aspect, the open / close detecting means is provided separately from the circulating air passage.

By disposing the open / close detecting means separately from the circulating air path, it is ensured that minute dust in the exhaust air may cause a contact failure or the like and erroneously recognize the exhaust state of the exhaust air. , And reliable variable control of the exhaust air volume can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a vacuum cleaner according to an embodiment of the present invention will be described below with reference to the drawings.

2 and 3, reference numeral 1 denotes a cleaner main body. The cleaner main body 1 includes a lower case 2a having an upper surface opened and formed of, for example, acrylonitrile-butadiene-styrene (ABS). An upper case 2b of the same material that closes the rear upper surface of the case 2a has a main case 2 having a front upper surface opened by sandwiching a bumper 3 on a peripheral edge including a front surface and opening the front upper surface. The cover 4 is rotatably supported by a lid 4 that closes an opening on the upper surface so as to be openable and closable.

The main body case 2 is provided with a rotatable revolving wheel 5 on the front lower surface in the traveling direction, and large-diameter driven rear wheels 6 and 6 are rotatably provided on the rear side surface of the main body case 2. The cleaner body 1 can travel on a floor (not shown) with the turning wheel 5 and the driven rear wheels 6 and 6. In addition, a handle 8 which is rotatable in a vertical direction is provided on an upper portion of the main body case 2.
Is provided.

On the other hand, a partition 11 having a communication hole 10 in a lattice shape is provided in the cleaner main body 1, and an upper part is opened at a front side of the partition 11, which is a front side in the traveling direction of the cleaner main body 1. A dust collection chamber 13 is defined. An electric blower room 15 containing an electric blower 14 located behind the dust collection chamber 13 is formed behind the partition 11. In the dust collecting chamber 13, a dust collecting bag 17 is detachably mounted by a holder 16 pivotally mounted in the dust collecting chamber 13.

A grid-like frame 18 is provided on the front surface of the partition 11.
A filter body 18b having air permeability that is detachably attached to a
Auxiliary dust collection filter that has a grid-like communication hole 10 and that has
18 is detachably mounted. The dust collecting bag 17 and the first auxiliary dust collecting filter 18 are attached and detached through an opening on the upper surface of the dust collecting chamber 13. The lid 4 has a rear end pivotally attached to the upper case 2b and is formed so as to cover the dust collection chamber 13 from the upper side so as to be freely opened and closed.

Further, on the rear surface side of the partition 11, an inducer section 20 is attached. This inducer section 20
Is located at a position deviated to one side from the approximate center.
And a wall-shaped portion 22 to which a sealing member (not shown) is attached to a peripheral edge of the partition 11 so as to be opened in a trumpet shape toward the dust collecting chamber 13 on one side. Also, wall-shaped part
A support rib portion 24 that protrudes in a substantially cylindrical shape around the center of the flow hole 21 is provided on the surface of the side opposite to the side where the opening 22 expands. When the inducer section 20 is assembled in the main body case 2, the partition wall 11 and the inducer section are formed.
A rectifying chamber 28 is defined between the 20, and the electric blower chamber 15 and a drum chamber (not shown) are defined in the width direction of the main body case 2 on the side of the inducer section 20 where the support rib 24 protrudes.

On the other hand, the electric blower room 15 has an electric blower
14 are arranged. The electric blower 14 includes, for example, a motor unit 31 serving as a motor for rotating a fan (not shown) with a rotor shaft, and an umbrella-shaped truncated conical or trumpet-shaped fan cover 32 that covers the fan. A substantially circular intake port (not shown) is formed in the center of the front surface of the fan cover 32, and a motor exhaust hole 34 is formed in the frame 33 of the electric unit 31. A motor head 36 internally provided with a bearing for supporting a rotor shaft (not shown) for driving the fan to rotate is provided substantially at the center of the rear end face of the electric unit 31.
Is formed to project rearward in a columnar shape.

At the front end of the electric blower 14, the outer peripheral edge of the fan cover 32, which is the outer peripheral edge of the front end, is connected to the support rib portion 24 of the inducer portion 20 by, for example, an annular rubber. Support member 37 is fitted. A rubber buffer 38 is attached to the motor head 36 at the rear end of the electric blower 14 so as to cover the motor head 36. The electric blower 14 is provided with a fan cover via a support 37 at an upper rib front portion (not shown) protruding from the lower surface of the upper case 2b and a lower rib front portion 40 protruding from the lower surface of the lower case 2a. The motor head 36 is clamped and fixed in the radial direction, and is provided with an upper rib rear portion 41 protruding from the lower surface of the upper case 2b and a lower rib rear portion 42 protruding from the lower surface of the lower case 2a via a buffer body 38 via a buffer 38. Are fixed in the radial direction, and are accommodated and fixed in the electric blower room 15. The air inlet of the electric blower 14 is
Accordingly, the airtight communication with the dust collecting chamber 13 is made via the communication hole 21, the flow regulating chamber 28, and the communication hole 10.

A circuit room 45 is provided above the electric blower room 15.
A circuit board 46 on which control means for controlling the driving state of the electric blower 14 is mounted is arranged in the circuit room 45.

Further, an exhaust chamber 50 communicating with the electric blower room 15 is defined by a partition wall 51 in the cleaner body 1 behind the electric blower room 15. An exhaust port communicating with the motor exhaust hole 34 of the electric blower 14 through an exhaust chamber 50 is provided at an upper rear portion of the upper case 2b of the cleaner body 1.
An opening 52 is formed on the rear side of the upper case 2b. In the exhaust chamber 50, a second auxiliary dust filter (not shown) provided with a high-performance filter similar to the first auxiliary dust filter 18 is detachably provided.

The partition wall 51 is provided therein with an accommodation space 54 partitioned from the electric blower chamber 15 and the exhaust chamber 50. In this accommodation space, an exhaust air volume control means connected to the circuit board 46 is provided. 55 are arranged. The exhaust air volume control means 55 includes a holding case 56 attached to the partition wall 51, as shown in FIGS. The holding case 56 is adjacent to a substantially box-shaped motor housing portion 58 having an open upper surface for housing the motor 57, and a side from which the output shaft 59 of the motor 57, which is one surface side of the motor housing portion 58, extends. And an exhaust duct section 61 provided with a cover section 60 and having a hollow inside. The exhaust duct 61 and the exhaust chamber 50 form an exhaust air path 62 that communicates the exhaust port 52 with the electric blower chamber 15 on the exhaust side of the electric blower 14.

The exhaust duct 61 of the holding case 56 is provided on the lower surface with an exhaust upstream hole 64 opening to the electric blower chamber 15, and the exhaust duct 61 is opened to the exhaust chamber 50 on the side of the cover 60. An exhaust downstream hole 65 is provided. Further, on the lower surface of the exhaust duct portion 61, a band-shaped valve holding portion 67 is provided so as to straddle the exhaust upstream hole 64. And this valve holding part
On / off valve 68 is movably attached to 67. The on-off valve 68 has a rod-shaped shaft support 70 movably penetrating a through hole 69 provided at a position facing the exhaust upstream hole 64 substantially at the center of the valve holding portion 67, and an outer peripheral surface of the shaft support 70. Exhaust upstream hole
A valve portion 71 provided with a diameter larger than 64 to open and close the exhaust upstream hole,
A seal member 72 is provided on the surface of the valve portion 71 facing the exhaust upstream hole 64, which is the upper surface, and is substantially airtightly attached to the periphery of the exhaust upstream hole 64. Note that the shaft support 70 has a spherical upper end. The on-off valve 68 is provided between the valve portion 71 and the valve holding portion 67 through the shaft
A coil spring 74 is provided as urging means for urging the exhaust upstream hole 64 in a direction to close the hole at 71.

Further, a motor 57 is provided in the exhaust duct 61.
Flat cylindrical operating cam integrated with the output shaft 59
76 is located above the exhaust upstream hole 64, and the upper end of the shaft support 70 of the on-off valve 68 is slidably abutted on the outer peripheral surface. The outer peripheral surface of the operation cam 76 has a center angle of approximately 270 °.
An engagement groove 77 having a gradually increasing depth dimension is provided on the peripheral surface of the sector in the range of. Further, the operation cam 76 has a detection arm 78 protruding therefrom.

In the exhaust duct 61, a pair of on / off switches SW1 and SW2, each of which is provided with dustproofing, is provided with an operating cam.
It is located on both lower sides of 76, that is, at a position where the center angle is about 120 ° from the center of the operation cam 76, and at a position that is substantially equidistant from the exhaust upstream hole 64.

The exhaust air volume control means 55 is provided at the deepest position of the engagement groove 77 of the operation cam 76 at the shaft support of the on-off valve 68.
When the upper end of 70 is engaged, the valve 71 closes the exhaust upstream hole 64 and the detection arm 76 is turned on by one of the on / off switches SW1.
And close it. Further, the exhaust air volume control means 55
When the upper end of the shaft support 70 of the on-off valve 68 comes into contact with the outer peripheral surface of the operation cam 76 which is disengaged from the engagement groove 77 of the operation cam 76 and where the engagement groove 77 is not located, the urging of the coil spring 74 is prevented. The opening / closing valve 68 moves to open the exhaust upstream hole 64, and the detection arm 78 is brought into contact with the other on / off switch SW2 to be closed.

On the other hand, a suction portion 82 is provided at substantially the center of the front side of the main body case 2 to open a substantially cylindrical main body suction port 80 and to detachably connect a hose 81 thereto. This body suction port 80
Has a front part opening to the front of the cleaner body 1 and a rear part opening to the dust collection chamber 13. Further, a shutter (not shown) that slidably closes the main body suction port 80 is slidably supported by the suction portion 82.

The bottom of the main body case 2 has a circulation upstream hole 83 opened at one end toward the electric blower chamber 15 and a circulation downstream hole opened at substantially the center of the main body suction port 80 of the suction part 82 at the other end. A main body exhaust air passage 85 as a circulation air passage having a hole 84 is provided.

The hose 81 includes a hose inner tube 87 having flexibility and a hose outer tube 88 having flexibility to enclose the hose inner tube 87 coaxially with a gap therebetween.
89, a connection pipe 90 provided at one end of the hose section 89 and fitted and connected to the suction section 82 of the cleaner body 1, and a grip section 91 provided at the other end of the hose section 89.

The connecting pipe 90 is coaxially and air-tightly provided with a hose inner pipe 87 on the inner circumferential surface on one end side, which is the side on which the hose outer pipe 88 is fitted to the suction portion 82, on the outer circumferential surface. A mounting rib 93 for fitting and fixing is provided. Further, a connection circulation hole 94 is formed in the connection pipe 90 at the other end side from the mounting rib 93. When the connection pipe 90 is connected to the suction portion 82, the connection circulation hole 94 is connected to the circulation downstream hole 84 of the suction portion 82.
And is provided at a position that is continuous with and opposite to. Then, by attaching the hose inner pipe 87 to the mounting rib 93,
The hose inner pipe 87 is opened at the tip of the connection pipe 90.

Further, the gripping portion 91 is a double pipe having an inner pipe (not shown) connected to the hose inner pipe 87 and an outer pipe connected to the hose outer pipe 88 and coaxially enclosing the inner pipe via a gap. A grip portion 97 is provided which branches from the outer peripheral surface of the communication tube portion 96 of the structure toward the rear. At the base end of the grip portion 97, an electric blower 14 in the cleaner body 1 and a rotary cleaning body disposed in a suction body 98, which is a suction body connected to a distal end described later, are provided. An operation unit 99 for setting driving of a driving source, which is an electric motor to be rotated, is provided. The operation unit 99 is connected to the circuit board 46 of the cleaner main body 1 via a transmission line 100 provided in a spiral shape on the hose outer tube 88 of the hose 81.

An extension tube 101 is provided at the tip of the grip 91.
Are detachably connected. The extension pipe 101 includes an extension pipe inner pipe (not shown) detachably connected to the inner pipe of the communication pipe section 96 of the gripping section 91 and an extension pipe outer pipe 102 detachably connected to an outer pipe of the communication pipe section 96. A double tube structure is provided coaxially with a gap in between.

Further, at the end of the extension tube 101, a suction port body 9 is provided.
8 is detachably connected. It is to be noted that not only the extension pipe 101 but also accessories such as a suction brush main body 98 or furniture brushes and gap nozzles (not shown) can be attached to the distal end of the grip portion 91.

Further, the main suction port 98 is provided with a lower case 105 having an upper surface opened, and an upper case 106 having a closed upper surface.
There is a nozzle case 108 as a case body having a rectangular shape elongated in the left-right direction, which is attached so as to sandwich 7 at the periphery.
In the nozzle case 108, a suction chamber which is formed in the left and right direction and which is formed in a longitudinal shape and which opens a suction port (not shown) on the lower surface and accommodates a rotary cleaning body, and a drive source which is an electric motor for rotating the rotary cleaning body is provided. There is provided a drive chamber for accommodating therein, and a blow-out duct chamber which opens a blow-out hole toward the suction port. A communication pipe 109 whose base end is pivotally supported and which is detachably connected to the extension pipe 101 and the hose 81 and whose front end is rotatable in the vertical direction is provided substantially at the center of the rear part of the nozzle case 108. The communication pipe 109 has a communication inner pipe (not shown) having a distal end connected to the extension inner pipe of the extension pipe 101 and a proximal end communicating with the suction chamber, and a discharge duct having a distal end connected to the extension outer pipe 102 and a proximal end connected to the extension duct. The outer pipe 110 communicating with the chamber is formed in a double pipe structure provided substantially coaxially.

When the hose 81 is connected to the communication pipe 109 of the suction port main body 98 via the extension pipe 101, the suction port of the suction port main body 98 is connected to the suction chamber, the communication inner pipe of the communication pipe 109,
The air communicates with the extension inner pipe of the extension pipe 101, the inner pipe of the grip portion 91 of the hose 81, the hose inner pipe 87 of the hose section 89, and the intake port on the intake side of the electric blower 14 through the dust collection chamber 13, and Constitutes a suction air passage 112 into which air is sucked. Further, the electric blower chamber 15 in which the motor exhaust hole 34 of the electric blower 14 on the positive pressure side of the electric blower 14 is opened has a main body exhaust air passage 85, a connection pipe 90, a hose outer pipe 88 of a hose part 89, and a grip part 91. Outer tube, extension outer tube 102 of extension tube 101, communication outer tube 110 of communication tube 109 of suction port body 98,
An exhaust air passage 113 is formed by communicating with an air outlet opening to the suction chamber through the air outlet duct chamber.

Next, the internal configuration of the above embodiment will be described with reference to FIG.

The commercial AC power supply E is connected to the electric blower 14 via a triac Tr. Also a triac
On the gate of Tr, mounted on the circuit board 46, the electric blower 14
And a control means 121 for controlling the driving of the electric motor 57 of the exhaust air volume control means. Further, the commercial AC power supply E is connected to a 15 V constant voltage source 122 provided in the cleaner body 1. Further, a 5V constant voltage source 123 is connected to the 15V constant voltage source 122, and the 5V constant voltage source 123
And supplies electric power to the control means 121. The control means 121, the 15V constant voltage source 122 and the 5V constant voltage source 123 are grounded.

The control means 121 is connected to a switching means 125 mounted on the circuit board 46 for controlling the drive and rotation direction of the electric motor 57. The electric motor 57 is connected to the switching means 125, and rotates the electric motor 57 in a predetermined direction by the electric power supplied from the 15V constant voltage source.

Further, an on / off switch SW1 is connected to the control means 121 via a resistor R1, and an on / off switch SW2 is connected via a resistor R2.
One of the ON / OFF switches SW1 and SW2 is connected to a 5V constant voltage source, and the other contact is grounded.

When a setting operation for exhausting a part of the exhaust air from the exhaust port 52 of the operation section 99 provided on the grip section 91 of the hose 81 is performed, the control means 121 sets the on / off switch.
SW1 is closed, the side of the control means 121 to which the resistor R1 is connected is at a low level and the side to which the resistor R2 is connected is at a high level, and both the on / off switches SW1 and SW2 are opened.
In a state where the sides of the control means 121 to which the resistors R1 and R2 are connected are at a high level, the switching means 125
Control the motor 5 until the on / off switch SW2 is closed.
Rotate 7 forward. Further, in a state where the on / off switch SW2 is closed and a state where both the on / off switches SW1 and SW2 are opened by the setting operation of the operation unit 99 to circulate substantially all of the exhaust air without exhausting from the exhaust port 52, By controlling the switching means 125, the electric motor 57 is rotated reversely until the on / off switch SW1 is closed.

Next, the cleaning operation of the above embodiment will be described.

First, the cover 4 is closed, a power supply cord (not shown) is pulled out, a commercial AC power supply E is supplied, and the shutter is slid to open the main body suction port 80.
A hose 81, an extension pipe 101, and a suction port main body 98 are sequentially connected to 80, and a cleaning standby state is set.

In this cleaning standby state, the control means 121 is initialized by the supply of the commercial AC power supply E for starting the cleaning, and the on / off switches SW1, SW2 of the exhaust air volume control means 55 are initialized.
The closed state of is detected. If the control unit 121 detects that the on / off switch SW2 is closed or that both of the on / off switches SW1 and SW2 are open, the control unit 121 determines that the exhaust upstream hole 64 is open, The motor 57 is rotated forward by controlling the motor 125, the motor 57 is rotated forward until the on / off switch SW1 is closed, and the on-off valve 68 closes the exhaust upstream hole 64 of the exhaust duct 61. Note that the control means 121, when detecting the state in which the on / off switch SW1 is closed, switches the switching means 12
5 is not controlled and enters the standby state.

Then, in this cleaning standby state, the operating state of the electric blower 14 or the drive source of the suction port main body 98 is set by the operation unit 99 disposed on the holding unit 91 of the hose 81, and the supplied electric power is used. The electric blower 14 or the driving source is driven in a predetermined driving state, and the gripper 91 is pushed and pulled in the front-rear direction to move the suction port body 98 on the floor surface for cleaning.

By driving the electric blower 14, dust is sucked into the suction chamber together with air from the suction port, and the communication inner pipe of the communication pipe 109 of the suction port main body 98, the extension inner pipe of the extension pipe 101, and the holding portion of the hose 81. The dust is collected in the dust collecting bag 17 mounted in the dust collecting chamber 13 through the inner pipe 91, the hose inner pipe 87 of the hose section 89 of the hose 81, and the suction section 82. Further, the air filtered by the dust bag 17 is sucked from the intake port of the electric blower 14 through the first auxiliary dust filter 18, passes through the electric blower 14, and has a motor exhaust hole 34 of the electric blower 14. Is discharged into the electric blower room 15 as exhaust air.

The exhaust air discharged into the electric blower chamber 15 by driving the electric blower 14 is discharged from the circulation upstream hole 83 to the main body exhaust air passage 85, the suction section 82, the connection pipe 90, and the hose outer pipe of the hose section 89. 88, the outer tube of the grip portion 91, the extended outer tube 102 of the extended tube 101,
The communication outer pipe 110 of the communication pipe 109 of the suction port main body 98 is blown out from the blow-out hole toward the suction chamber through the blow-out duct while being muted through the blow-out duct chamber, and blows up dust from the floor surface desired for the suction port. When the driving source of the suction port main body is driven by the setting operation of the operation unit 99 of the grip unit 91 to rotate the rotary cleaning body, the rotary cleaning body scrapes dust from the floor surface. The blown-up or scraped-out dust is sucked in again together with the exhaust air and is captured by the dust collecting bag 17 in the dust collecting chamber 13, and the exhaust air circulates.

The exhaust air circulates so that the suction port main body 98 does not stick to the floor surface and the running performance is not reduced.

Further, for example, when the dust near the periphery of the nozzle case 108, which cannot be sucked because the suction port such as a wall is not opposed to the nozzle case 108, is sucked and cleaned, or the exhaust air passage 113 is not provided instead of the suction port body 98. In the case of connecting and cleaning the product, a setting operation is performed to exhaust the exhaust air from the exhaust port 52 without circulating the exhaust air through the operation unit 99 of the holding unit 91.

By the setting operation to exhaust air from the exhaust port 52 of the operation section 99, the control means 121 causes the switching means 125
Is controlled to rotate the electric motor 57. That is, before the electric motor 57 is driven, the on / off switch SW1 is closed and the on-off valve 68 of the exhaust air volume control
Since the exhaust upstream hole 64 of 61 is closed, the switching means 125 rotates the electric motor 57 in the reverse direction. The reverse rotation of the electric motor 57 also causes the operation cam 76 to rotate in the reverse direction.
The upper end of the shaft support 70 that engages with the deepest position of the engagement groove 77 slides in the engagement groove 77, and gradually pushes down the on-off valve 68 against the bias of the coil spring 74, and the exhaust upstream hole Open 64. When the electric motor 57 is rotated until the upper end of the shaft support 70 of the on-off valve 68 is disengaged from the engagement groove 77 and is positioned on the outer peripheral surface of the operation cam 76, the arm that rotates with the rotation of the operation cam 76 The unit 78 contacts the on / off switch SW2 and closes. The control means 121 controls the closing of the on / off switch SW2.
Is detected, the control means 121 controls the switching means 125, and controls the switching means 125 to stop the rotation driving of the electric motor 57.

In this state, the exhaust air discharged into the electric blower chamber 15 by the driving of the electric blower 14 is discharged to the main body exhaust air passage.
Due to the air path resistance of the hose 85 and the hose 81, the air is exhausted from the exhaust port 52 to the outside air through the exhaust upstream hole 64, the inside of the exhaust duct, the exhaust downstream hole 65, and the exhaust chamber 50.

When a setting operation for recirculating the exhaust air from the operation unit 99 to perform cleaning is performed again, the on / off switch SW2 is closed, and the on-off valve 68 of the exhaust air volume control unit 55 is switched to the exhaust duct unit. Since the exhaust upstream hole 64 of the opening 61 is open, the switching means 125 rotates the electric motor 57 forward. By the forward rotation of the electric motor 57, the operation cam 76 also rotates forward, and the upper end of the shaft support 70 abutting on the outer peripheral surface of the operation cam 76 engages with the engagement groove 77 and gradually reaches the deepest position of the engagement groove 77. It slides, and the on-off valve 68 moves upward by the restoring force of the coil spring 74, and gradually closes the exhaust upstream hole 64. And
When the electric motor 57 is rotationally driven until the upper end of the shaft support 70 of the on-off valve 68 is engaged with the deepest position of the engagement groove 77, the arm 78 that rotates with the rotation of the operation cam 76 turns on / off the switch SW1. Abuts and closes. This on / off switch SW1
Is detected by the control means 121, the control means 121 controls the switching means 125, and controls the switching means 125 to stop the rotation drive of the electric motor 57.

As described above, in the above embodiment, the electric motor
A state in which the opening / closing valve 68 is moved by driving the 57 to exhaust almost all of the exhaust air from the electric blower 14 from the exhaust port 52,
Exhaust air volume control that detects the on / off state of the pair of on / off switches SW1 and SW2 to detect the on / off state of the pair of on / off switches SW1 and SW2 and controls the drive of the electric motor 57 to control the exhaust air volume from the exhaust port 52 In order to provide the means 55, the electric motor 57
Compared to the configuration in which the on-off valve 68 detects whether the exhaust upstream hole 64 is fully open or fully closed by detecting the value of the lock current of the current flowing through With a simple configuration using the on / off switches SW1 and SW2, the drive of the electric motor 57 can be controlled by easily recognizing the exhaust air volume corresponding to the open / close state of the exhaust upstream hole 64, and the variable control of the exhaust air volume can be facilitated.

Further, even if the rating of the electric motor 57 is changed, it is not necessary to change the current value of the lock current to be controlled or the setting of the temperature for controlling, and it is necessary to consider the variation caused by the characteristics of each electric motor 57. Therefore, it is possible to use a motor 57 having a different rating without using any of the components, so that parts can be used and versatility can be improved.

In order to control the exhaust air volume, an exhaust port
Direct opening and closing of the exhaust upstream hole 64 of the exhaust air passage 62 communicating with 52
Since the exhaust air volume control means 55 that opens and closes at 68 is provided, the exhaust air volume is reliably controlled compared to a configuration in which the exhaust air volume from the exhaust port 52 is indirectly controlled by, for example, opening and closing the main body exhaust air channel 85. When the exhaust air is circulated, the exhaust air path 62 leading to the electric blower room 15 through the exhaust port 52 is formed.
Is closed, so that noise can be surely reduced.

In the above embodiment, the canister type vacuum cleaner for cleaning by connecting the hose 81, the extension pipe 77, and the suction body 98 to the cleaner body 1 has been described.
Upright type in which the suction main body 98 is connected to the cleaner main body 1 via the extension pipe 101, and the suction main body is directly connected to the cleaner main body 1.
Anything can be used, such as a handy type to which 98 is connected.

Then, a pair of on / off switches SW1 and SW2 provided with dustproofing measures are arranged in the exhaust duct 61,
For example, a configuration may be adopted in which a magnetic switch or the like is provided on the cover to detect the rotation of the operation cam magnetically. According to this configuration, the on / off switches SW1 and SW2 are not located in the wind path through which the exhaust air flows, and a minute dust or the like in the exhaust air causes a contact failure or the like, thereby erroneously recognizing the exhaust state of the exhaust air. Can be prevented, and the variable control of the exhaust air volume can be reliably performed.

Further, a pair of on / off switches SW1, SW2
However, the present invention is not limited to two, and for example, an on / off valve may be operated by one on / off switch, or control may be performed by a plurality of on / off switches.

An exhaust duct portion communicating with the exhaust port 52
Although the configuration for opening and closing the 61 has been described, a configuration for controlling the amount of exhaust from the exhaust port 52 by opening and closing the main body exhaust air path 85 serving as a circulation air path may be adopted.

Further, almost all of the exhaust air from the electric blower 14 is exhausted by using the pair of on / off switches SW1 and SW2.
The driving of the electric motor 57 was controlled by recognizing the state of exhausting from the exhaust port and the state of circulating without exhausting from the exhaust port 52. Instead of the pair of on / off switches SW1 and SW2, as shown in FIG. Alternatively, a rotation variable resistor 131 that is a variable resistor may be used.

That is, in FIG.
Is connected via a resistor R3 to an operation element 132 which is in sliding contact with a resistor main body R4 having one end of a rotary variable resistor 131 grounded and the other end connected to a 5V constant voltage source. The operation member 132 is provided integrally with the operation cam 76, and the electric motor 57
The exhaust air volume control means 133 is configured such that the operating element 132 slides on the resistance main body R4 by the driving of and the resistance value varies. Further, the exhaust air volume control means 133 includes a rotation variable resistor 131.
If the resistance of the valve becomes, for example, 0 to 0.5 V,
The upper end of the shaft support portion 68 engages with the deepest position of the engagement groove 77 of the operation cam 76 to close the exhaust upstream hole 64.
Further, when the resistance value of the variable rotation resistor 131 is, for example, 4.6 V to 5.0 V, the exhaust air volume control means 133 operates when the upper end of the shaft support 70 of the on-off valve 68 is disengaged from the engagement groove 77. The on-off valve 68 located on the outer peripheral surface of the cam 76 is pushed down to open the exhaust upstream hole 64.

In the cleaning standby state, the control means 121 is initialized by the supply of the commercial AC power supply E for starting cleaning, and the resistance value of the rotation variable resistor 131 of the exhaust air volume control means 133 is detected. Then, the control unit 121 determines that the resistance value to be detected is not 0 to 0.5V, that is, 0.6V to 0.5V.
At 5.0 V, it is determined that the exhaust upstream hole 64 is open,
The control means 121 controls the switching means 125 so that the resistance value is zero.
The motor 57 rotates forward until a voltage of ~ 0.5 V is detected, and the on-off valve
At 68, the exhaust upstream hole 64 of the exhaust duct 61 is closed. Note that the control means 121 determines that the resistance value to be detected is 0 to
When the voltage is 0.5 V, the switching means 125 is not controlled, and a standby state is set.

When cleaning is performed from this standby state,
When a setting operation to exhaust the operation section 99 of the 91 from the exhaust port 52 without circulating the exhaust air is performed, the rotation variable resistor 131
Is in a state in which the on-off valve 68 of the exhaust air volume control means 133 closes the exhaust upstream hole 64 of the exhaust duct 61, the switching means 125 rotates the electric motor 57 in the reverse direction. The reverse rotation of the electric motor 57 also causes the operation cam 76 to rotate in the reverse direction, so that the upper end of the shaft support 70 that engages with the deepest position of the engagement groove 77 of the operation cam 76 slides in the engagement groove 77, and the coil spring 74 Push down the on-off valve 68 gradually against the bias,
The exhaust upstream hole 64 is opened. And the shaft support of the on-off valve 68
When the electric motor 57 is driven to rotate so that the upper end of 70 is disengaged from the engagement groove 77 and is positioned on the outer peripheral surface of the operation cam 76, the operator 132 of the rotary variable resistor 131 that rotates with the rotation of the operation cam 76 As a result, the resistance value gradually increases. Then, when the control means 121 detects the resistance value of 4.6 to 5.0 V, the control means 121 controls the switching means 125,
The switching means 125 controls the rotation of the electric motor 57 to be stopped.

When a setting operation for cleaning by circulating the exhaust air from the operation unit 99 is performed, the rotation variable resistor 13
1 has a resistance value of 4.6 to 5.0 V and the opening / closing valve 68 of the exhaust air volume control means 133 opens the exhaust upstream hole 64 of the exhaust duct portion 61. Let it. The forward rotation of the electric motor 57 causes the operation cam 76 to rotate.
Also rotates forward, and the upper end of the shaft support 70 abutting against the outer peripheral surface of the operation cam 76 engages with the engagement groove 77, and gradually slides to the deepest position of the engagement groove 77, reducing the restoring force of the coil spring 74. Open / close valve
68 moves upward, and gradually closes the exhaust upstream hole 64.
When the electric motor 57 is driven to rotate until the upper end of the shaft support 70 of the on-off valve 68 engages with the deepest position of the engagement groove 77, the rotation variable resistor 131 that rotates with the rotation of the operation cam 76 , The resistance value gradually decreases. Then, when the control means 121 detects the resistance value of 0 to 4.5 V, the control means 121 controls the switching means 125, and controls the switching means 125 to stop the rotation driving of the electric motor 57.

As described above, the on-off valve is driven by the drive of the electric motor 57.
The resistance value of the rotary variable resistor 131 is detected by moving 68 to detect a state in which almost all of the exhaust air from the electric blower 14 is exhausted from the exhaust port 52 and a state in which the exhaust air is circulated without exhausting the exhaust air from the exhaust port 52. And recognizes and controls the drive of the motor 57 to
In order to provide the exhaust air volume control means 133 for controlling the exhaust air volume from the 52, the on-off valve 68 fully opens the exhaust upstream hole 64 by detecting the current value of the lock current of the current flowing to the electric motor 57 and the temperature when the electric motor 57 is locked. Alternatively, as compared with a configuration that recognizes whether or not the motor is fully closed, the simple configuration using the rotary variable resistor 131 easily recognizes the exhaust air volume corresponding to the open / closed state of the exhaust upstream hole 64 and controls the electric motor 57. Driving can be controlled, and variable control of the exhaust air volume can be easily performed.

In the embodiment shown in FIG. 7, the variable resistor is not limited to a rotary type, and may have any configuration. However, it can be provided directly on the output shaft of the rotating electric motor 57. A rotary type is preferable.

Further, depending on the resistance value of the variable resistor 131, other control such as operating the opening / closing valve 68 at an intermediate opening degree may be added.

[0069]

According to the first aspect of the present invention, the exhaust air amount is controlled by detecting the on / off state of the on / off switch of the on / off detection means by detecting the on / off state of the on / off valve operated by the drive of the motor by the exhaust air volume control means. In order to control the amount of exhaust air from the mouth, for example, compared to a configuration in which the current value or temperature of the motor is detected and the open / closed state is electrically detected by a change in the current value or temperature, the characteristics of each motor are It is not necessary to consider the resulting variation, and it is possible to use a motor having a different rating, so that the exhaust air volume can be easily variably controlled.

According to the vacuum cleaner of the second aspect, in addition to the effect of the vacuum cleaner of the first aspect, the on-off state of the on-off valve operated by driving the electric motor by the exhaust air volume control means is controlled by the variable resistor. In order to control the exhaust air volume by detecting the resistance value that changes in conjunction with each other, for example, compared to a configuration in which the open / close state is detected based on a change in the current value or temperature by detecting the current value or temperature of the electric motor, It is not necessary to consider the variation due to the characteristics of the motor, and it is possible to use a motor having a different rating, so that the exhaust air volume can be easily variably controlled.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the open / close detecting means is disposed separately from the circulating air path, so that the air in the exhaust air can be prevented. It is possible to reliably prevent erroneous recognition of the exhaust state of the exhaust air due to poor contact caused by fine dust and the like, and it is possible to reliably perform variable control of the exhaust air volume.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the cleaner body.

FIG. 3 is a perspective view showing a cleaner body to which the hose, the extension pipe, and the suction port body are connected.

FIG. 4 is a perspective view showing an exhaust air volume control unit according to the first embodiment;

FIG. 5 is a perspective view showing the exhaust air volume control unit with the cover part removed.

FIG. 6 is a cross-sectional view of the vicinity of the on-off valve of the exhaust air volume control means showing opening and closing of the exhaust upstream hole by movement of the on-off valve.

FIG. 7 is a block diagram showing an internal configuration of a vacuum cleaner according to another embodiment of the present invention.

[Explanation of symbols]

 2 Body case 14 Electric blower 52 Exhaust port 55, 133 Exhaust air volume control means 57 Motor 68 Open / close valve 85 Main body exhaust air passage as circulation air passage 131 Rotary variable resistors as variable resistors SW1, SW2 ON / OFF switch

Claims (3)

[Claims] 1. A main body case containing an electric blower and having a main body suction port communicating with an intake side of the electric blower, and a circulating air passage provided in the main body case and communicating an exhaust side of the electric blower with an intake side. An exhaust port provided in the main body case and opened to communicate with the exhaust side of the electric blower; an on-off valve; an electric motor for operating the on-off valve; and an on / off switch for detecting the on / off state of the on-off valve. An exhaust air volume control means for controlling the amount of exhaust air from the exhaust port. 2. A main body case containing an electric blower and having a main body suction port communicating with an intake side of the electric blower, and a circulating air passage provided in the main body case and communicating an exhaust side of the electric blower with an intake side. An exhaust port provided in the main body case and communicating with the exhaust side of the electric blower to open; an on-off valve; a motor for operating the on-off valve; and a resistance value that changes in conjunction with the operation of the on-off valve. An electric vacuum cleaner comprising: an open / close detecting means for detecting an open / close state of the open / close valve; and an exhaust air amount control means for controlling an exhaust air amount from the exhaust port. 3. The vacuum cleaner according to claim 1, wherein the opening / closing detecting means is disposed separately from the circulation air passage.