JP2002200012A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner whose exhaust hot air can be efficiently circulated without lowering dust sucking power in cleaning. SOLUTION: A shutter 48 is opened to open a suction port 45 of the main body and a hose 48, extension pipe and the suction port body are connected for cleaning. A control means for exhaust circulation moves an exhaust valve to discharge a part of exhaust air from an electric blower 21 outside and circulate the rest part and generates negative pressure on the lower face of the suction port body to enable to efficiently suck dust. On finishing cleaning, the hose 46 is detached to close the shutter 48. The control means for exhaust circulation moves the exhaust valve to close a first exhaust port of an exhaust path 111 to circulate the whole exhaust air as hot air from a second exhaust port to a dust collecting chamber 13 via a circulation duct 51. The temperature in the dust collecting chamber 13 is quickly raised in a short time to enable hot air to be efficiently circulated.

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 circulating exhaust air discharged from an electric blower to a dust collection chamber.

[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 Patent Application Laid-Open No. 8-1733 is disclosed.
A configuration described in Japanese Patent Publication No. 49 is known.

The vacuum cleaner described in Japanese Patent Application Laid-Open No. 8-173349 has a main body case that can run on the floor. In the main body case, an electric blower chamber for housing the electric blower is formed on the rear side in the traveling direction by partition ribs. In the main body case, a dust collection chamber is formed by a partition rib, which is located on the front side in the traveling direction, has a main body suction opening opening forward, and communicates with the suction side of the electric blower. Furthermore, a circulation air passage is provided in the main body case, one end of which opens to the electric blower chamber and the other end opens to the main body suction port and communicates with the dust collection chamber. On the electric blower chamber side of the circulation air passage, an exhaust valve that opens the circulation air passage and communicates with the electric blower room when the inside of the circulation air passage becomes a predetermined negative pressure state with respect to the atmospheric pressure. Is provided. An exhaust port is formed in the main body case so as to communicate with the electric blower room.

On the other hand, a connecting pipe of a hose detachably connected to the main body suction port is provided with a communication hole communicating with the circulation air passage. The connection pipe of the hose communicates with the circulation air passage through the communication hole while being connected to the main body suction port, and communicates the circulation air passage with the dust collection chamber.

[0005] By closing the end of the hose connected to the connection pipe to the main body suction port, the negative pressure with respect to the atmospheric pressure in the circulating air passage increases, and when a predetermined negative pressure is reached, the circulating air passage is closed. The exhaust valve is opened to connect the circulation air passage to the electric blower room. When the exhaust valve is opened, part of the exhaust air exhausted from the electric blower into the electric blower chamber is not exhausted from the exhaust port, but is again passed through the circulation air passage, the communication hole, the connection pipe, and the dust collection chamber. The exhaust air is circulated and circulated. Then, the circulating exhaust air gradually rises in temperature and becomes hot air, and becomes hot air circulation that kills microorganisms such as mites trapped in the dust collection chamber.

However, Japanese Patent Application Laid-Open No. H8-17334 discloses
In the vacuum cleaner described in Japanese Patent Publication No. 9, part of the exhaust air exhausted from the electric blower is exhausted from the exhaust port. For example, cold outside air is sucked in from a gap of a main body intake port to which a connection pipe is connected, It may take time to raise the temperature in the dust collection chamber.

In order to shorten the time required for the temperature in the dust collection chamber to rise to a predetermined temperature, it is conceivable to drive the electric blower with a high input of, for example, about 700 W when circulating hot air, but the power consumption is large. Become.

On the other hand, as a vacuum cleaner for cleaning by circulating exhaust air, for example, a configuration described in Japanese Utility Model Publication No. 39-36553 is known.

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. It is captured in the dust collecting chamber of the vacuum cleaner main body via an extension pipe having a double pipe structure to which the connecting pipe is connected, and an inner pipe of a double hose having the double pipe structure to which the extension pipe is connected. Further, the air exhausted after the dust is separated and removed in the dust collection chamber and sucked into the electric blower is blown 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. Then, the exhaust air is exhausted to the outside air to generate discomfort and noise, and the negative pressure with respect to the atmospheric pressure at the lower surface of the opening of the suction port increases, so that the suction port body sticks to the floor surface and the operability decreases. To improve the cleaning environment and cleaning workability.

However, Japanese Utility Model Publication No. 39-3655
In the circulation type vacuum cleaner as described in Japanese Patent Publication No. 3 (1993), since the exhaust air circulates, the negative pressure with respect to the atmospheric pressure is reduced on the lower surface of the suction port body, and in some cases, the floor located around the suction port body. There is a possibility that dust on the surface will not be sucked in, and for example, dust located near a wall or the like will be hardly sucked.

[0011]

As described above, in the vacuum cleaner described in Japanese Patent Application Laid-Open No. 8-173349, most of the exhaust air exhausted from the electric blower is exhausted from the exhaust port. Cool outside air is sucked in from the gap of the main body suction port to which the connection pipe is connected. For this reason, it may take time to raise the temperature in the dust collecting chamber, and there is a problem that the electric blower must be driven with a large input in order to raise the temperature in a short time.

Further, in a circulating vacuum cleaner as disclosed in Japanese Utility Model Publication No. 39-36553, the exhaust air circulates in its entirety without being exhausted. Does not grow. For this reason, in some cases, there is a problem in that dust on the floor surface located around the suction opening body may not be sucked, and for example, dust located near a wall or the like may be hardly sucked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric vacuum cleaner capable of efficiently circulating hot air of exhaust air without lowering a dust-absorbing force at the time of cleaning.

[0014]

According to a first aspect of the present invention, there is provided an electric vacuum cleaner having an electric blower room accommodating an electric blower, and a main body suction opening which is openable and closable which communicates with an intake side of the electric blower of the electric blower room. A main body case having a dust collection chamber and communicating with the exhaust side of the electric blower and opening an exhaust port,
A circulation air passage provided in the main body case and communicating the exhaust side of the electric blower to the dust collection chamber; an exhaust air passage provided in the main body case and communicating the exhaust side and the exhaust port of the electric blower; An exhaust valve for opening and closing an exhaust air passage is provided.In a state in which a main body suction port of the main body case is closed, the exhaust air passage is closed by the exhaust valve and exhaust air exhausted from an electric blower passes through the circulation air passage. Exhaust circulation control means for circulating the dust through the dust collection chamber.

[0015] During normal cleaning in which the main body suction port is opened in the dust collection chamber of the main body case, the exhaust circulation control means passes through an exhaust air passage communicating with the exhaust side of the electric blower of the main body case. Exhaust air exhausted from the electric outlet to the electric blower room from the electric blower is exhausted, and dust is sucked from the main body inlet. Further, in a state where the main body case is not cleaned with the main body suction port closed, the exhaust air passage of the main body case is closed by the exhaust valve by the exhaust circulation control means, and the exhaust air exhausted from the electric blower to the electric blower chamber is circulated by the exhaust air. It circulates through the path to the dust collection chamber, quickly raises the temperature in the dust collection chamber, and efficiently circulates hot air.

According to a second aspect of the present invention, in the vacuum cleaner of the first aspect, the main body case includes a shutter for opening and closing the main body suction port, and the exhaust circulation control means includes a main body suction port provided by the shutter. By closing the opening, the exhaust air path is closed by the exhaust valve.

The exhaust air circulation control means closes the main body suction port with a shutter provided in the main body case, so that it is determined that cleaning is not to be performed. Circulate exhaust air. For this reason, it is easy to switch the exhaust air flow during cleaning and the full circulation of exhaust air flow when not performing cleaning with a simple configuration.

According to a third aspect of the present invention, there is provided a vacuum cleaner having an electric blower chamber for housing an electric blower, and a dust collection chamber communicating with an intake side of the electric blower of the electric blower chamber and having a main body suction opening opened, A main body case that communicates with the exhaust side of the electric blower and has an exhaust port opened; an exhaust air path provided in the main body case that communicates the exhaust side of the electric blower and the exhaust port; and a lower surface facing the surface to be cleaned A suction port body having a suction chamber with an open suction port, the suction port body being connected to and connected to the main body suction port of the main body case through the suction chamber, and one end opening to the electric blower chamber of the main body case and the other end being A circulating air passage opening to a suction chamber of the suction port body; and an exhaust valve for opening and closing an exhaust air path of the main body case. The exhaust air path is provided by the exhaust valve when the suction port of the suction port body is closed. To be exhausted from the electric blower The ethos through the air circulation duct is obtained by including an exhaust circulation control means for circulating the suction chamber of the suction port body.

In a normal cleaning in which the suction port of the suction port body connected to and connected to the main body suction port of the main body case is opened, the exhaust circulation control means communicates with the exhaust side of the electric blower of the main body case. Exhaust air exhausted from the electric blower to the electric blower room from the exhaust port through the exhaust air passage is exhausted,
The negative pressure on the lower surface of the suction port body is increased to suck dust from the suction port. Further, in a non-cleaning state in which the suction port of the suction port body is closed, the exhaust air passage of the main body case is closed by the exhaust valve by the exhaust circulation control means, and the exhaust air exhausted from the electric blower into the electric blower chamber is circulated by the exhaust air. The air is circulated from the suction chamber of the suction port body to the dust collection chamber via the passage, and the temperature in the dust collection chamber is quickly raised to efficiently circulate hot air.

A vacuum cleaner according to a fourth aspect of the present invention is the vacuum cleaner according to the third aspect, further comprising a lid for opening and closing the suction port of the suction port body.

By providing a lid that can open and close the suction port of the suction port so as to be openable and closable, it is possible to easily switch between exhaust air exhaustion during cleaning and full circulation of exhaust air flow when not performing cleaning with a simple configuration. The part is easier.

[0022]

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, and the cleaner main body 1 has a main body case 2 having an open front upper surface. The main body case 2 includes a lower case 2a formed of, for example, acrylonitrile-butadiene-styrene (ABS) having an open upper surface, and an upper case 2b of the same material closing the rear upper surface of the lower case 2a. The bumper 3 is sandwiched and joined to the periphery including the front surface. The body case 2 is formed with a lid 4 that rotatably and axially supports a lid 4 that closes an opening on the front upper surface so as to be openable and closable.

On the lower surface on the front side of the main body case 2 in the traveling direction, a revolving swivel wheel 5 is attached. A large-diameter driven rear wheel 6 is provided on the rear side surface of the main body case 2.
6 is provided rotatably. And body case 2
The cleaner body 1 can travel on a floor surface (not shown) with the turning wheel 5 and the driven rear wheels 6 and 6. A handle 8 is provided on the upper part of the main body case 2 so as to be rotatable up and down.

On the other hand, a partition 11 having a communication hole 10 in a lattice shape is provided in the cleaner body 1. In the cleaner main body 1, a dust collection chamber 13 is defined and formed on the front side of the partition wall 11 in the traveling direction of the cleaner main body 1. The upper part of the dust collection chamber 13 is opened, and the upper surface is opened and closed by the lid 4.
In the dust collecting chamber 13, a dust collecting bag 15 is detachably mounted by a holder 14 pivotally mounted in the dust collecting chamber 13. In addition, the rear side of the partition 11 has an inducer 16
Is attached. The inducer 16 has a wall 18 having a substantially circular flow hole 17 at a position deviated to one side from the center. The wall portion 18 expands in a trumpet shape toward the dust collecting chamber 13 on the front side, and a seal member 19 that is in close contact with the peripheral edge of the partition wall 11 is attached to the peripheral edge. A rectification chamber 20 is defined between the wall 19 of the inducer 16 and the partition 11.

A motor case 23 is disposed behind the inducer 16 and behind the dust collecting chamber 13 to partition an electric blower room 22 in which an electric blower 21 is housed. The motor case 23 has an electric blower 21
An inflow port 25 communicating with the suction port 24 is formed.
Further, the motor case 23 is formed with a first discharge port 26 and a second discharge port 27 which are open to the internal electric blower chamber 22 and communicate with an exhaust port (not shown) of the electric blower 21. . In the main body case 2, a motor case 23 is provided.
An exhaust chamber 29 is defined and formed on the outer surface side of.

The electric blower 21 includes, for example, a motor unit 31 as a motor for rotating a fan (not shown) by a rotor shaft, and an umbrella-shaped truncated cone having a substantially circular intake port at the center of the front surface. Fan cover with opening 24
32. In the electric blower 21, the fan cover 32 is fitted and held in a holding rib 34 projecting substantially in a cylindrical shape substantially coaxial with the inflow port 25 in the motor case 23. By disposing the electric blower 21 in the motor case 23, the intake port 24 is collected through the inflow port 25 of the motor case 23, the communication hole 17 of the inducer 16, the communication hole 10 of the rectifying chamber 20 and the partition 11. The dust chamber 13 is in air-tight communication.

A motor case is provided in the main body case 2.
A drum chamber 36 is provided behind the 23 and communicates with the exhaust chamber 29. A winding drum 38 that winds a power cord 37 that supplies electric power to the electric blower 21 is provided in the drum chamber 36. Further, above the drum chamber 36,
A cord port 41 having a function as an exhaust port from which the plug 40 of the power cord 37 is led out is formed. The cord port 41 communicates with the first discharge port 26 of the motor case 23 via the drum chamber 36 and the exhaust chamber 29.

At the approximate center of the front side of the main body case 2,
A suction part 47 is provided which opens a substantially cylindrical main body suction port 45 and detachably connects a hose 46 thereto. This body suction port
Reference numeral 45 denotes a large-diameter suction large-cylindrical portion 45a having a front portion opened forward of the cleaner body 1, and a coaxially-smaller, smaller-diameter than the suction-cylindrical portion 45 and communicating with the dust collecting chamber 13. And a small-diameter suction small cylindrical portion 45b. And the main body inlet 45 is
The large suction cylinder portion 45a and the small suction cylinder portion 45b are formed in steps. Further, a shutter 48 for slidably supporting the main body suction port 45 so as to be openable and closable is supported by the suction portion 47.

The main body case 2 is provided with a circulation duct 51. The circulation duct 51 has one end communicating with the second discharge port 27 of the motor case 23 and the other end formed in a step portion between the large suction cylinder 45a and the small suction cylinder 45b of the main body suction port 45 of the suction portion 47. It is provided in communication with the open circulation hole 52.

Further, the main body case 2 has a first discharge port.
Exhaust circulation control means 55 for opening and closing 26 is provided. The exhaust circulation control means 55 includes a holding case 56 attached to the motor case 23. The holding case 56 is provided with an electric motor accommodating portion 57 for accommodating an electric motor (not shown) and a first surface provided on the one side of the electric motor accommodating portion 57 so as to be adjacent to an output shaft 58 of the electric motor. Exhaust duct section 59 that covers the exhaust port 26 of the
And

The holding case 56 has a first discharge port 26.
An exhaust valve 61 that opens and closes the exhaust valve 61, and connects the exhaust valve 61 to the first exhaust port 26.
There is provided an unillustrated urging means, such as a coil spring, for urging in the direction in which is closed. This exhaust valve 61 is
A shaft that is axially movably supported by the holding case 56
The shaft 62 has a valve portion 63 which is provided integrally with the shaft 62 in a flange shape and whose peripheral edge can be airtightly connected to and separated from the peripheral edge of the first discharge port 26.

Further, in the exhaust duct portion 59, a cam portion 65 is integrally attached to a distal end portion of the output shaft 58 of the electric motor which protrudes. The cam portion 65 has an exhaust valve 61 on its outer peripheral surface.
One end of the shaft 62 slidably abuts. This cam section
The outer peripheral surface of 65 is formed so that the diameter dimension gradually decreases in the circumferential direction.

The exhaust circulation control means 55 rotates the cam 65 by driving the electric motor, and moves the exhaust valve 61 to open and close the first exhaust port 26. That is, in a state where the shaft 62 of the exhaust valve 61 is in contact with the outer peripheral surface where the diameter of the cam portion 65 is the largest, the exhaust valve 61 moves against the urging of the urging means, and the first exhaust is moved. The outlet 26 is opened. Further, in a state where the shaft 62 of the exhaust valve 61 is in contact with the outer peripheral surface where the diameter of the cam portion 65 is the smallest, the exhaust valve 61 moves by the restoring force of the urging means, and the first exhaust port 26 is moved. Close.

The exhaust circulation control means 55 includes a shutter 48
Is provided with a shutter switch (not shown) that closes when the main body suction port 45 of the suction part 47 is closed. And
The exhaust gas circulation control means 55 drives the electric motor appropriately by opening and closing the shutter switch to move the exhaust valve 61,
Opening / closing of the discharge port 26 is appropriately performed.

On the other hand, the hose 46 has a hose portion having a flexible hose inner tube (not shown) and a flexible hose outer tube 72 for coaxially enclosing the hose inner tube via a gap. It has 73. Further, a connection pipe 74 fitted and connected to the suction section 47 of the cleaner body 1 is provided at the base end of the hose section 73.
Are provided integrally. Further, a grip portion 75 is integrally provided at a distal end of the hose portion 73.

The connecting tube 74 includes a connecting outer tube 77 in which the hose outer tube 72 is fitted and fixed to the outer peripheral surface of the base end. The distal end of the connection outer tube 77 is fitted to the large suction cylinder portion 45a of the main body suction port 45 of the suction portion 47. In addition, a mounting rib 78 protruding inward is provided on the inner peripheral surface on the distal end side of the connection outer tube 77. Further, inside the connection outer tube 77, a connection inner tube 79 which is fitted and fixed to the tip of the mounting rib 78 and is coaxially included via a gap is provided. The connection inner tube 79 has a hose inner tube 71 fitted and fixed on the outer peripheral surface of the base end, and a distal end connected to the connection outer tube 77.
The suction small cylindrical portion 45 of the main body suction port 45 of the suction portion 47 that protrudes further
Fit with b. The connection pipe 74 has a connection circulation hole 80 formed at the tip of the connection outer pipe 77 and the outer peripheral surface of the connection inner pipe 79. The connection circulation hole 80 connects the connection pipe 74 to the suction portion 47.
Is connected to the circulation hole 52 of the suction part 47 so as to communicate therewith.

Further, the grip part 75 has a communication pipe part 82 and a grip part 83 that is protruded from the outer peripheral surface of the communication pipe part 82 so as to be directed rearward. The communication pipe portion 82 includes a gripping inner pipe (not shown) connected to the hose inner pipe, and a gripping outer pipe 85 connected to the hose outer pipe 72 and coaxially enclosing the gripping inner pipe 84 via a gap. It is formed in a double tube structure. An operation section 89 is provided at the base end of the grip section 83. The operation unit 89 is a drive source that is a motor that rotates the rotary cleaner and the like disposed in the suction opening 87 connected to the distal end, and the driving state of the electric blower 14 in the cleaner body 1.
There are provided various switches 89a, 89a for setting the driving state of the motor 88 and the driving state of the electric motor of the exhaust circulation control means 55. The operation unit 89 is connected to a circuit board (not shown) provided in the cleaner body 1 via a transmission line (not shown) provided spirally on the hose outer tube 72 of the hose 46.

The proximal end of the extension tube 91 is detachably connected to the distal end of the grip portion 75. This extension tube 91 is
An extension pipe inner pipe (not shown) detachably connected to the gripping inner pipe of the communication pipe section 82 of the communication pipe section 75 and an extension outer pipe 92 detachably connected to the gripping outer pipe 85 of the communication pipe section 82 via a gap. It is formed in a double tube structure provided on the same axis.

A suction port 87 is detachably connected to the end of the extension pipe 91. It is to be noted that not only the extension pipe 91 but also accessories such as a furniture brush or a gap nozzle (not shown) can be attached to the tip of the grip portion 75.

Further, the suction port body 87 has a nozzle case 95 as a case body having a rectangular shape in the left-right direction.
The nozzle case 95 has an upper case 95b on the upper surface of a lower case 95a having an upper surface opened and a bumper 95c
Is attached to the periphery. In the nozzle case 95, a suction chamber 98 which is formed to be longitudinally partitioned in the left-right direction, has a suction port 96 opened on the lower surface, and accommodates the rotary cleaning body 97.
And a drive source that is an electric motor that rotationally drives the rotary cleaning body 97.
A drive chamber (not shown) for accommodating 88 and an outlet duct chamber 100 that opens an outlet 99 in the inlet chamber 98 toward the inlet 96 are provided. Also, at the approximate center of the rear of the nozzle case 95,
A communication pipe whose base end is pivotally supported and which is detachably connected to the extension pipe 91 and the hose 46, and whose distal end is rotatable and rotatable in the vertical direction.
101 is provided. The communication pipe 101 has a communication inner pipe 102 having a distal end connected to the extension inner pipe of the extension pipe 91 and a proximal end communicating with the suction chamber 98, and a communication duct 101 having a distal end connected to the extension outer pipe 92 and a proximal end connected to the outlet duct. A communication outer tube 103 communicating with the chamber 100 is formed in a double tube structure provided substantially coaxially.

A flexible lid 105 for opening and closing the suction port 96 is detachably attached to the suction port 87. The lid body 105 has a substantially elongated flat plate-shaped plate portion 106 having substantially the same shape as the suction port 96, and a mounting piece portion 107 formed to be bent at a peripheral edge of the plate portion 106 and engaged with an opening edge of the suction port 96. It has. Then, the lid 105 attaches the mounting piece 107 to the suction port 96.
The fitting piece 107 is inserted into the suction port 96 by bending it into the inside.
It is attached and detached by locking. In addition, the suction body
The 87 is provided with a suction port switch (not shown) that is closed when the lid 105 is attached and the suction port 96 is closed. By opening and closing the suction port switch, the exhaust circulation control means 55 appropriately drives the electric motor to move the exhaust valve 61 and open and close the first discharge port 26 as appropriate.

The extension pipe 9 is connected to the communication pipe 101 of the suction port body 87.
The hose 46 is connected via the
7 suction port 96, suction chamber 98, communication inner pipe 102 of communication pipe 101,
Extension inner tube of extension tube 91, gripping inner tube 8 of gripping portion 75 of hose 46
4.Hose inner tube 71 of hose part 73, connection inner tube 7 of connection tube 74
9, and a suction air passage 110 through which the air is sucked through the dust collection chamber 13 and communicates with an intake port 24 on the intake side of the electric blower 21.
Is configured. Further, an electric blower chamber 22 in which an exhaust hole (not shown) of the electric blower 21 on the exhaust side of the electric blower 21 is opened.
The exhaust air passage 111 communicates with the cord port 41 through the first exhaust port 26, the exhaust chamber 29, and the drum chamber 36, and exhausts exhaust air exhausted from the electric blower 21 to the outside. . Further, the electric blower room 22 is provided with a second outlet 27, a circulation duct 51, a circulation hole 52 of a suction part 47, and a connection outer pipe 7 of a connection pipe 74.
7, hose outer tube 72 of hose part 73, gripping outer tube 8 of gripping part 75
5.The extended outer pipe 92 of the extended pipe 91, the communicating outer pipe 103 of the communicating pipe 101 of the suction port body 87, and the blow-out hole 99 which opens to the suction chamber 98 through the blow-out duct chamber 100, and the circulation air passage 112 Is configured.

When both the first discharge port 26 communicating with the exhaust air path 111 and the second discharge port 27 communicating with the circulation air path 112 are open, the air is exhausted into the electric blower chamber 22. A part of the exhaust air is exhausted from the cord port 41 through the exhaust air passage 111.

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

First, the cover 4 is closed, and the power cord 37 is closed.
To supply commercial AC power. Also, shutter
Slide 48 to open the main body suction port 45, this main body suction port
The hose 46, the extension pipe 91, and the suction port body 87 are sequentially connected to 45, and a cleaning standby state is set.

Then, in this cleaning standby state, the electric blower 21 or the suction port body is operated by the operation section 89 of the grip section 75 of the hose 46.
The drive state of the drive source 88 of the drive 87 is set, and the electric blower 21 and the drive source 88 are driven in a predetermined drive state to set the cleaning mode. Further, according to the setting of the cleaning mode, the exhaust circulation control means 55 drives the electric motor appropriately to move the exhaust valve 61 and open the first exhaust port 26. In the state of the cleaning mode in which the electric blower 21 is driven, the grip portion 75 is pushed and pulled in the front-rear direction, and the suction opening 87 is caused to travel on the floor surface for cleaning.

When the electric blower 21 is driven, the suction port 96
Dust is sucked into the suction chamber 98 together with air, and the communication inner pipe 102 of the communication pipe 101 of the suction port body 87, the extension inner pipe of the extension pipe 91, the holding inner pipe 84 of the holding portion 75 of the hose 46, and the hose 46 The dust is trapped in the dust bag 15 mounted in the dust collection chamber 13 via the hose inner tube 71 of the hose portion 73 and the connection inner tube 79 of the connection tube 79. The air filtered by the dust bag 15 is sucked from the air inlet 24 of the electric blower 21 through the communication hole 10, the rectifying chamber 20, and the inlet 25 of the motor case 23, and passes through the inside of the electric blower 21. Through the exhaust hole of the electric blower 21
Exhaust air is exhausted into the interior of 22.

The exhaust air discharged into the electric blower chamber 22 by the drive of the electric blower 21 is partially discharged to the first discharge port.
The air is exhausted from the cord port 41 to the outside through the exhaust chamber 29, the drum chamber 36, and the remainder flows out from the second exhaust port 27. The exhaust air flowing out of the second outlet 27 is circulated to the circulation duct.
51, circulation hole 52 of suction part 47, connection outer pipe 77 of connection pipe 74, hose outer pipe 72 of hose part 73, gripping outer pipe 85 of gripping part 75, extension pipe
91 extension outer tube 92, suction opening body 87 communication tube 101 communication outer tube 10
3, through the outlet duct chamber 100, the air is blown out from the outlet 99 into the suction chamber 98 toward the inlet 96 while being silenced and absorbed. The exhaust air blown out from the outlet 99 blows up dust from the floor facing the inlet 96. Note that the gripper
When the driving source 88 of the suction opening 87 is driven by the setting operation of the operation unit 89 of 75 to rotate the rotary cleaning body 97, the rotary cleaning body 97 scrapes dust from the floor surface. Then, the blown-up or scraped-out dust is sucked again together with the exhaust air and the air exhausted from the cord port 41 and is captured by the dust collecting bag 15 in the dust collecting chamber 13, and the exhaust air circulates. .

The exhaust air circulates so that the suction opening 87 does not stick to the floor surface and the running performance is not deteriorated, and cleaning is easy. Further, since a part of the exhaust air is exhausted to the outside and a negative pressure is generated on the lower surface of the suction port body 87, dust on the floor positioned around the suction port body 87 can be absorbed, and the efficiency is improved. Can be cleaned.

When the cleaning is completed, the hose 46, the extension pipe 91 and the suction port body 87 are removed from the main body suction port 45, and the shutter 48 is slid to close the main body suction port 45.
When the main body suction port 45 is closed by the shutter 48, a shutter switch (not shown) is closed. Then, the exhaust gas circulation control means 55 determines that the cleaning has been completed, and appropriately drives the electric motor by closing the shutter switch to set the exhaust valve.
61 is moved to close the first discharge port 26 of the exhaust air passage 111, and the electric blower 21 is appropriately driven to enter the hot air circulation mode.

The exhaust air discharged from the electric blower 21 into the electric blower chamber 22 by the electric blower 21 in the hot air circulation mode in a state where the first discharge port 26 of the exhaust air passage 111 is closed almost completely. The whole amount flows through the second discharge port 27 and flows into the main body suction port 45 of the suction part 47 via the circulation duct 51. Since the main body suction port 45 is closed from the outside by the shutter 48, the exhaust air flowing into the main body suction port 45 passes through the dust collection chamber 13 and is sucked again from the suction port 24 of the electric blower 21 and circulated. I do. When the entire amount of the exhaust air circulates in the cleaner body 1, the temperature of the exhaust air is reduced by the electric blower 21.
The temperature in the dust collection chamber 13 rises immediately due to the heat of
The temperature immediately rises to about 5 to 60 ° C., and kills microorganisms such as mites in the dust collection chamber 13. Then, after driving the electric blower 21 for a predetermined time, the electric blower 21 is stopped, and the hot air circulation mode is ended. Note that the electric blower 21 is not limited to being stopped after a predetermined time has elapsed, but may be stopped by a temperature sensor or the like. Thereafter, the power supply cord 37 is wound around the winding drum 38, cleared at a predetermined place, and the cleaning is completed.

The hot air circulating mode operates by closing the main body suction port 45 with the shutter 48 and pulling out the hose 46, or by attaching the lid 105 to the suction port body 87 after cleaning to complete the suction. 96 can be closed. That is,
The suction port switch (not shown) is closed by closing the suction port 96 of the suction port body 87 with the lid. Then, the exhaust circulation control means 55 determines that the cleaning has been completed by closing the suction port switch, appropriately drives the electric motor to move the exhaust valve 61, and moves the first exhaust port 26 of the exhaust air passage 111 to the first exhaust port 26. Is closed, and the electric blower 21 is appropriately driven to enter the hot air circulation mode. In the hot air circulation mode, the air flows in the same manner as the circulation air passage 112 through which the exhaust air in the cleaning mode flows.
Thereby, microorganisms such as mites existing in the circulation air passage 112 can also be killed.

As described above, in the cleaning mode in which the main body suction port 45 of the main body case 2 is opened by the exhaust gas circulation control means 55, the exhaust air from the electric blower is externally discharged. The first exhaust port 26 of the exhaust air passage 111 communicating with the cord port 41 for exhausting air is opened, and dust is efficiently sucked in a state where a part of the air is sucked from the inlet 96 of the inlet body 87. Also,
In the hot air circulation mode in which the main body suction port 45 is blocked by the shutter 48 and is not cleaned, the first discharge port 26 of the exhaust air path 111 is not used.
Is closed by the exhaust valve 61, and the entire amount of the exhaust air from the electric blower 21 is circulated to the dust collection chamber 13 via the circulation duct 51. For this reason, in the cleaning mode, dust can be efficiently absorbed, and in the hot air circulation mode, almost all of the exhaust air is completely circulated, so that the temperature of the exhaust air can be quickly raised and the dust collection chamber can be quickly raised to a predetermined temperature. In addition, the hot air can be efficiently circulated in a short time without driving the electric blower 21 with a large input.

In the hot air circulation mode operated after the end of the cleaning, the shutter switch is closed by closing the main body suction port 45 with the shutter 48 at the end of the cleaning to operate. For this reason, the hot air circulation mode can be easily operated by one operation at the end of cleaning with a simple configuration without separately providing a configuration for operating the hot air circulation mode.

Further, in the cleaning mode, a part of the exhaust air is circulated to the suction port body 87 to circulate the exhaust air, and the suction port 96 is closed and the lid 105 is attached to the suction port body 87. As a result, the hot air circulation mode
The temperature of the entire system 2 can also quickly rise to a predetermined temperature, and not only the microorganisms in the dust collection chamber 13 but also the microorganisms in the circulation air passage 112 can be killed.

When the hot air is circulated in the entire circulation air passage 112, the lid 105 is attached to the suction port 87 with the suction port 96 closed so that the suction port switch is closed and operated. With a simple configuration, it is possible to easily switch to the hot air circulation mode with the work at hand.

In the configuration in which the hot air is circulated through the entire circulation air passage 112, since the sound is particularly silenced and absorbed by the longitudinal hose 46, the respective operation sounds can be reduced in both the cleaning mode and the hot air circulation mode.

In the above embodiment, the canister-type vacuum cleaner for cleaning by connecting the hose 46, the extension pipe 91, and the suction port 87 to the cleaner body 1 has been described. The present invention can be applied to any of an upright type in which the suction port 87 is connected via the pipe 91 and a handy type in which the suction port 87 can be directly connected to the cleaner body 1.

Although the circulation type vacuum cleaner has been described in which a part of the exhaust air from the electric blower 21 is circulated to the suction opening 87 for cleaning, a configuration in which the exhaust air is not circulated may be employed.
That is, for example, in the case of cleaning, the exhaust air is exhausted from an exhaust port such as the cord port 41 through the exhaust air path 111, and in the case of hot air circulation, the exhaust air path 111 is closed and the entire amount of exhaust air is circulated in the circulation duct. 51 and the dust collecting chamber 13 through the main body suction port 45 of the suction part 47.
It can also be applied to a configuration of circulating through.

In the cleaning mode, a part of the exhaust air is exhausted to the outside. However, for example, a silent mode or the like is provided in the operation unit 89 and the exhaust air is circulated to the suction port 96 of the suction port body 87 entirely. It is also possible to provide a configuration for performing cleaning.

Further, the exhaust gas circulation control means 55 includes an exhaust valve 61
Not only the opening and closing of the first exhaust port 26 of the exhaust air path 111 due to the
The exhaust valve 61 can be moved so that the opening area of the exhaust gas can be changed, and the amount of exhaust air exhausted from the cord port 41 to the outside via the exhaust air passage 111 can be made variable. According to this configuration, cleaning can be appropriately performed in accordance with the cleaning environment such as the surrounding environment to be cleaned, the amount of dust to be absorbed, and the floor surface condition.

[0063]

According to the first aspect of the present invention, the exhaust air volume control means exhausts the exhaust air from the electric blower through the exhaust air passage during normal cleaning in which the main body suction port is opened. In order to exhaust air from the mouth and suck dust from the main body suction port, and when the main body suction port is closed and not cleaned, the exhaust air path is closed by the exhaust valve and the exhaust air is circulated to the dust collection chamber through the circulation air path, The temperature inside the dust collection chamber can be quickly raised, and the hot air can be efficiently circulated.

According to the vacuum cleaner of the second aspect, in addition to the effect of the vacuum cleaner of the first aspect, the exhaust circulation control means determines that cleaning is not performed when the main body suction port is closed by the shutter. Since the exhaust air path is closed by the exhaust valve and the exhaust air is circulated, it is possible to easily switch between the exhaust air exhaust for cleaning and the full exhaust air circulation for no cleaning with a simple configuration.

According to the third aspect of the invention, the exhaust air circulation control means allows the exhaust air from the electric blower to pass through the exhaust air path during normal cleaning in which the suction port of the suction port is opened. Exhaust air is exhausted from the exhaust port, dust is sucked from the intake port, and when the intake port is closed and not cleaned, the exhaust air path is closed by the exhaust valve and the exhaust air is circulated to the suction chamber of the suction port body through the circulation air path. Therefore, the temperature in the dust collection chamber can be quickly raised, and the hot air can be efficiently circulated.

According to the vacuum cleaner according to the fourth aspect, in addition to the effect of the vacuum cleaner according to the third aspect, a lid is provided for closing the opening of the suction opening so that the suction opening can be opened and closed. It is possible to easily switch the exhaust air circulation at the time of cleaning and the circulation of the exhaust air at the time of non-cleaning at the hand.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a cleaner main body according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a cleaner body to which the hose, the extension pipe, and the suction port are connected.

FIG. 3 is a first view of a motor case accommodating the electric blower according to the first embodiment;
FIG. 5 is a radial cross-sectional view showing a state where the discharge port is opened.

FIG. 4 is an axial sectional perspective view showing a motor case accommodating the above electric blower.

FIG. 5 is a first view of a motor case accommodating the electric blower according to the first embodiment;
FIG. 4 is a radial cross-sectional view showing a state in which a discharge port is closed.

FIG. 6 is a cross-sectional view showing the suction port body.

FIG. 7 is a bottom perspective view showing the suction port body.

[Explanation of symbols]

 2 Body case 13 Dust collection room 21 Electric blower 22 Electric blower room 41 Cord opening as exhaust port 45 Body intake port 48 Shutter 51 Circulation duct as circulation air path 55 Exhaust circulation control means 61 Exhaust valve 87 Suction port body 96 Suction port 105 Lid 111 Exhaust air passage 112 Circulating air passage

Claims (4)

[Claims] 1. An electric blower room accommodating an electric blower, and a dust collecting chamber having an openable and closable main body suction opening which communicates with an intake side of the electric blower of the electric blower room. A main body case having an exhaust port opened to communicate with a side thereof; a circulating air passage provided in the main body case for communicating an exhaust side of the electric blower with the dust collecting chamber; and an exhaust of the electric blower provided in the main body case. An exhaust air passage communicating the side and the exhaust port, and an exhaust valve that opens and closes the exhaust air path. The exhaust valve is closed by the exhaust valve in a state where the main body inlet of the main body case is closed. An electric vacuum cleaner comprising: exhaust circulation control means for circulating exhaust air exhausted from an electric blower to the dust collection chamber through the circulation air passage. 2. The main body case includes a shutter for opening and closing the main body suction port, and the exhaust gas circulation control means detects that the main body suction port is closed by the shutter and the exhaust valve is closed by an exhaust valve. The vacuum cleaner according to claim 1, characterized in that: 3. An electric blower chamber for accommodating an electric blower, a dust collection chamber communicating with an intake side of the electric blower of the electric blower chamber and having a main body suction opening, and communicating with an exhaust side of the electric blower. A main body case having an exhaust opening formed therein, an exhaust air passage provided in the main body case and communicating with an exhaust side of the electric blower and the exhaust opening, and a suction chamber having an intake opening formed on a lower surface facing a surface to be cleaned. A suction port body connected to the main body suction port of the main body case so as to communicate the suction chamber; one end opening to the electric blower chamber of the main body case and the other end opening to the suction chamber of the suction port body A circulation air path, and an exhaust valve for opening and closing the exhaust air path of the main body case. The exhaust air path is closed by the exhaust valve in a state where the suction port of the suction port body is closed, and the air is exhausted from the electric blower. Exhaust air that flows through the circulation air passage Vacuum cleaner characterized by comprising an exhaust circulation control means for circulating the suction chamber of the suction port body Te. 4. The vacuum cleaner according to claim 3, further comprising a lid for opening and closing the suction port of the suction port body.