JP3482145B2 - Air circulation type vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation of an electric blower in a cleaner body to suck air through an air inlet of an air inlet body, pass the air through a filter to capture dust, and then pass through the filter. The present invention relates to an air circulation type electric vacuum cleaner that returns air discharged from an electric blower to an intake port, collects the returned air, and cleans the air while circulating the air.

[0002]

2. Description of the Related Art Conventionally, various air circulation type electric vacuum cleaners have been proposed, but their suction systems are all suction inlets for sucking dust on a surface to be cleaned into a suction connection body of a cleaner body. Is a single suction system in which the communication pipe on the suction port side having the suction port body main part is inserted and connected, and with the operation of the electric blower in the cleaner body using only this suction system Dust is absorbed by the formed air circulation.

[0003]

However, since the suction port body is formed in a relatively large size so as to be suitable for cleaning the floor surface, the main body of the suction port body is relatively high such as a table or a wall. It is not appropriate and convenient to clean the cleaning place or to face the cleaning place narrower than the main portion of the suction port body such as the screen of the shoji or around the glass of the door. Such a situation exists in the configuration in which the communication pipe that is inserted and connected to the connection port body of the cleaner body and the suction port body main portion having the intake port are connected via the flexible dust suction hose. Even
The same is true of the upright type air circulation vacuum cleaner in which the suction port is directly connected to the lower end of the vacuum cleaner body.

By the way, as described above, in the air circulation type vacuum cleaner which collects the air discharged from the electric blower and circulates the air to clean it, the heat generated by the electric blower causes
Since the temperature of the circulating air is increased, there is an advantage that the harmful microorganisms sucked into the dust collecting chamber can be killed by the air having the high temperature.

Therefore, the problem to be solved by the present invention is to maintain the killing performance of harmful microorganisms in the dust collecting chamber,
Another object of the present invention is to obtain an air circulation type vacuum cleaner that can easily clean a place to be cleaned other than the floor surface.

[0006]

SUMMARY OF THE INVENTION According to the present invention, air sucked from an intake port of a suction port body by an operation of an electric blower built in a cleaner body is passed through a filter in an upstream dust collecting chamber of the electric blower. It is premised on an electric vacuum cleaner that captures dust by passing through the filter, returns the air discharged from the electric blower to the intake port, collects the returned air, and circulates the air for cleaning.

In order to solve the above-mentioned problems, the invention of claim 1 is provided with a flexible suction hose communicating with the upstream side of the filter, and the tip of this hose is detachably fitted. A hose support for closing the tip of the suction hose is provided in the cleaner body.

In the air circulation type vacuum cleaner according to the first aspect of the present invention, as the air discharged from the electric blower is circulated between the cleaner main body and the suction port body, from the suction port of the suction port body to the floor surface. The air circulation type cleaning can be performed by sucking dust on the surface to be cleaned. In the usage form based on the suction by the suction port body, the suction hose fitted to the hose support is not used because the tip end portion of the suction hose is closed and is mainly suitable for cleaning the floor surface. When the tip of the suction hose communicating with the upstream side of the filter is removed from the hose support during cleaning, in addition to the first suction system via the suction port body, the suction hose forming the second suction system. The outside air can be sucked in through the suction hose, and at this time, the flexibility of the suction hose itself allows the tip opening of the hose to face a cleaning place where cleaning is not appropriate for the suction port body and suck dust. Further, even in the use mode in which the suction hose provided in communication with the upstream side of the filter is used, the suction port body is not closed, and air circulation between the cleaner body and the suction port body can still be ensured.

In carrying out the invention of claim 1, as in the invention of claim 2 subordinate to this invention, a connection port body into which the communication pipe on the suction port side is inserted is provided upstream of the dust collecting chamber. It is preferable that the suction hose is connected to the suction pipe portion of the communication pipe that is inserted into the connection port body and guides the suction air flow to the dust collection chamber. Doing this is the first
It is excellent in that it is not necessary to separately provide a connection port for both the suction system and the second suction system, and the same connection port can be shared and dust can be sucked from both the suction port side and the suction hose side. There is.

In carrying out the invention of claim 2, as in the invention of claim 3 subordinate to the present invention, a branch pipe is provided in the tubular portion of the connection port body into which the suction pipe portion is inserted, and the branch pipe is provided. It is preferable that a through hole that communicates with the pipe be opened in the peripheral surface of the suction pipe portion and that the suction hose be connected to the branch pipe so that the suction pipe portion and the suction hose communicate with each other. This makes it possible to share the same connection port for both the first suction system and the second suction system, though it has a simple structure. Therefore, it is necessary to separately provide a connection port for both systems. It is excellent in that there is no.

In the upright type air circulation type vacuum cleaner according to the invention of claim 4 which depends on any one of claims 1 to 3, the suction port body is a suction device having the suction port. The mouth body main part, the communication pipe rotatably connected to the main part so as to be tilted relative to the main body, and inserted into the connection mouth, and the suction pipe sucks the cleaner body together with the communication pipe. An air flow rate adjusting means for increasing or decreasing the suction air passage cross-sectional area upstream of the branch pipe in association with the operation of tilting with respect to the main body of the mouth, and the suction when the cleaner body is raised. It is characterized in that a part of the cross-sectional area of the air passage is cut off by the air volume adjusting means.

According to the fourth aspect of the invention, when the suction port body is installed on the surface to be cleaned and the cleaner body is placed so that it can stand on its own, the relative position of the communication pipe with respect to the main part of the suction port body at that time. Along with the rotation, the air volume adjusting means maintains a circulation of air between the cleaner body and the suction port body, and cuts off a part of the suction air passage cross-sectional area to limit the circulation air volume to a small amount.
Therefore, by using the suction hose in this state, the influence of negative suction pressure on the hose increases and a large amount of air flow through the suction hose is secured, so that the dust suction force of the suction hose can be increased. Further, when the cleaner body is placed in a normal use posture in which the cleaner body is inclined from the self-supporting state to the surface to be cleaned without using the suction hose, the relative position of the communication pipe with respect to the main portion of the suction port body at that time With the rotation, the air volume adjusting means releases a part of the cut-off state of the suction air passage cross-sectional area and secures a large air circulation air volume between the cleaner body and the suction port body. It is possible to carry out the usual air circulation type cleaning that is realized.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 3, an upright type air circulation type vacuum cleaner 11 according to a first embodiment includes a cleaner body 12, a suction port body 13, and a handle 14. .

The cleaner main body 12 is formed by connecting a pair of left and right synthetic resin main body cases 21 shown in FIG. The handle 14 is connected to one side of the upper end portion of the main body case 21 (the side that becomes the back side when used) via a pivotal attachment portion 15. When used, the handle 14 having the operation switch 14a is arranged in a use position which continuously extends above the cleaner body 12 as shown in FIG. 1, and when not used, pivots downward around the pivotal attachment portion 15. Is folded and placed in a non-use position along the back side of the cleaner body 12. The length of the handle 14 is substantially equal to the total length of the cleaner body 12 and the suction port body 13 connected to the cleaner body 12 as will be described later.
Can support the vacuum cleaner body 12 so as not to lose its self-standing posture when its lower end comes into contact with the floor surface.

At the lower end of the main body case 21, a connection port body 22 exposed at the lower end surface is attached. The connection port body 22 is sandwiched between a pair of main body cases 21, and the positioning protrusions 22e shown in FIG.
It is installed so as not to move in the axial direction and the circumferential direction by being fitted to the projection receiving portion (not shown). As shown in FIG. 3, the suction port body 13 is detachably inserted and attached to the connection port body 22. As shown in FIGS. 4 to 6, the connection port body 22 is integrally branched from the peripheral surface of the small diameter portion 22b and the main pipe portion having a stepped cylindrical shape that connects the large diameter portion 22a and the small diameter portion 22b. A plurality of ventilation holes 22c are provided at intervals in the circumferential direction on the wall surface that is formed of the branch pipe 22d and that defines the boundary between the small diameter portion 22b and the large diameter portion 22a.

As shown in FIG. 3, required partition ribs whose tips are brought into contact with each other are integrally provided on the inner surfaces of both main body cases 21, and these ribs form the main body case 21. Inside is the dust collection chamber 23 at the bottom,
It is partitioned into an exhaust chamber 24 in the middle part, a reel housing part 25 in the upper part, and a recirculation chamber 26 extending over the dust collection chamber 23 and the exhaust chamber 24. The dust collection chamber 23, which is located on the front side of the exhaust chamber 24 (upstream side with respect to the flow of the intake air),
Is opened on the surface on the front side when used, and this opening is hermetically closed by a case lid 27 that is detachably attached to the lower part of the main body case 21.

As shown in FIGS. 3 and 4, the dust collection chamber 23
The slanted bottom wall of the is formed as the filter mounting portion 28,
In the vicinity of the filter mounting portion 28, a filter retainer 30 that is manually rotated against the force of a spring (not shown) in the direction of arrow E in FIG. An annular rubber seal 20 is provided between the filter mounting portion 28 and the small diameter portion 22b of the connection port body 22 so as to partition the space therebetween, and the seal 20 is a suction opening of a mouth frame described next. It integrally has a valve plate portion 20a for opening and closing. The valve plate portion 20a is pulled by the suction negative pressure to open the suction opening, and is returned to the position where the suction opening is closed by its own elastic force as the negative pressure disappears.

A dust collecting bag 31 made of a paper pack as a filter that can be put into and taken out of the dust collecting chamber 23 has a flat plate-shaped mouth frame 31a having a suction opening at the center thereof and is filtered by a filter holder 30. It is attached to the attachment portion 28 and is housed in the dust collection chamber 23. A filter support 32 having a large number of elongated ventilation holes is housed in the upper portion of the dust collection chamber 23, and the filter support 32 supports the dust collection bag 31 that has expanded due to the cleaning operation.

An electric blower 35 is installed in the exhaust chamber 24 with its suction port facing the dust collecting chamber 23 side. 36, 3
Reference numeral 7 is a vibration-proof motor supporting rubber fitted to both front and rear ends of the electric blower 35. The partition rib 38 located at the boundary between the exhaust chamber 24 and the dust collecting chamber 23 is provided with an opening 38a facing the suction port, so that the dust collecting bag 31 in the dust collecting chamber 23 is passed. Air is an electric blower 35
Is sucked into. Reference numeral 45 in FIG. 3 is arranged in communication with the suction side of the electric blower 35 and opens when the vacuum pressure in the dust collection chamber 23 falls below a predetermined value to collect air (outside air) outside the cleaner body 12. It is a leak valve for introducing into the dust chamber 23.

The electric blower 35 includes an electric blower 35a and a motor cover 39 attached to the blower 35a. As shown in FIG. 3, the electric blower 35a is
A commutator motor portion 35c, which is a component other than the blower portion such as a stator and a rotor, is projected downstream of the blower portion 35b in which the diffuser and the centrifugal fan are housed inside the fan cover. The motor support rubber 36 is fitted on the outer peripheral surface of the fan cover. During operation of the electric blower 35, the air in the dust collecting chamber 23 side sucked into the centrifugal fan through the suction port is discharged from the periphery of the fan, and then is guided by the inner surface of the fan cover while being guided to the outer periphery of the diffuser. From the entrance of the department, and
While being statically pressured by this diffuser, it is mainly discharged toward the periphery of the commutator motor portion 35c and the like.

The motor cover 39, which is molded in a cup shape from synthetic resin, covers the portion of the blower portion 35b downstream of the diffuser. The opening edge portion of the cover 39 is fitted on the outer peripheral portion of the fan cover with the motor supporting rubber 36 that hermetically seals between the both covers sandwiched therebetween. On the peripheral wall of the motor cover 39, a plurality of exhaust small holes (not shown) communicating the inside of the motor cover 39 with the exhaust chamber 24 are formed, and an exhaust port (not shown) facing the exhaust chamber 24 (not shown) in the main body case 21 ( The exhaust area is much larger than that of the exhaust small holes), and a predetermined amount of air is exhausted to the outside of the cleaner body 12 with respect to the circulating air volume by these exhaust paths to obtain the required intake performance. Is able to.

The motor support rubber 37 is attached to the central portion of the bottom wall of the motor cover 39 so as to project from the outer surface thereof. Electric blower 35 provided with this motor cover 39
With the motor support rubbers 36 and 37 fitted to both axial ends thereof, respectively, in the exhaust chamber 24 and the reel housing portion 25.
It is installed by being inserted between the partition rib 21b and the partition rib 38 which form the boundary of the above. As shown in FIG. 3, a cord reel 40 for supplying power to the electric blower 35 is housed in the reel housing portion 25.

As shown in FIGS. 3 and 5, an air outlet 41, which has a much larger opening area than that of the exhaust small hole (not shown), is integrally provided on the peripheral portion of the motor cover 39 so as to project.
A rubber packing 42 is fitted in the outlet 41.
The air outlet 41 is a partition rib 43 that partitions the reflux chamber 26.
It is airtightly connected to the hole 44 provided in the. for that reason,
Through the air outlet 41, the inside of the motor cover 39 and the recirculation chamber 26
Is in communication with.

The branch pipe 22d of the connection port body 22 arranged upstream of the dust bag 31 with respect to the flow of air sucked into the electric blower 35 is projected into the return chamber 26. As shown in FIGS. 4 and 6, the spiral convex portion 22f and the small-diameter portion 2 are provided on the outer peripheral surface of the distal end portion of the branch pipe 22d.
An annular collar 22g is continuously provided on the 2b side so as to project. The base end of the suction hose 33 is connected to the branch pipe 22d by being screwed to the spiral convex portion 22f and is screwed to the outer periphery of the connecting portion to form a donut-shaped rubber packing 34. Is being worn. The rubber packing 34 realizes airtightness of the connecting portion, and one surface thereof is bonded to the flange 22g.

Suction hose 3 mounted as described above
The hose 3 is composed of an accordion tube, has the flexibility of being freely deformable, and is expandable and contractible in the axial direction.
The flow passage cross-sectional area of 3 is smaller than the flow passage cross-sectional area of the inner pipe portion 62 described later. The suction hose 33 is pulled out to the outside of the cleaner body 12 through the hose lead-out portion 12 a at the bottom of the cleaner body 12. The hose lead-out portion 12a is a lead-out wall portion 12a1 formed integrally with the pair of main body cases 21 (see FIG. 2).
It is provided by combining.

A guide pipe 46 made of a hard synthetic resin or the like is attached to the inside of the hose lead-out portion 12a, in other words, a part of the reflux chamber 26. One end of the guide pipe 46 is connected to the branch pipe 22d by being fitted and fixed to the outer peripheral surface of the rubber packing 34 by adhesion. The other end of the guide pipe 46 is supported by the tip opening of the hose lead-out portion 12a by sandwiching an annular rubber packing 47 with the inner peripheral surface of the tip opening of the hose lead-out portion 12a. Regardless of the presence of the suction hose 33 that is installed so as to traverse the reflux chamber 26 that forms the reflux air passage, both packings 34 and 47 both provide airtightness between the reflux chamber 26 and the outside of the cleaner body 12, The return air is prevented from being blown out from the recirculation chamber 26 to the outside of the cleaner body 12 and the outside air being sucked into the recirculation chamber 26 from outside the cleaner body 12.

The suction hose 33 having the root portion accommodated in the guide pipe 46 has the suction hose 33 of the vacuum cleaner body 12 facing the floor surface in the normal usage posture of the vacuum cleaner 11 in which the vacuum cleaner body 12 is used in an oblique posture. It is pulled out upward along the surface. As shown in FIG. 2, a cylindrical grip tube 33a made of a hard synthetic resin is provided at the tip of the suction hose 33.
Are connected. The suction hose 33 can directly suck dust through the opening of the grip tube 33a when it is used, and as shown in FIG. 2 (B), the suction hose 33 can be detachably connected to the grip tube 33a. 48), or an auxiliary suction port body such as a round brush (not shown) can be connected to suck dust through the auxiliary suction port body 48. As shown in FIG. 2, on the outer surface of the cleaner body 12, for example, the hose support 4 is located near the base of the handle 14.
9 is projected. This hose support 49 is used for the grip tube 3
3a has a short closed cylinder portion 49a that fits inside or outside, and the grip tube 33a is detachably fitted to the cylinder portion 49a to close the tip end portion of the suction hose 33 to support the hose 33. To do.

Next, the suction port body 13 will be described with reference to FIGS. 4 and 7 to 12. The suction mouth body 13 is
A communication pipe 51 made of synthetic resin as a connecting portion communicated with the cleaner body 12 side, and a suction port body main portion 52 made of synthetic resin.
The rotary cleaning body 53, the return air outlet 54, the return air passage A and the suction air passage B are provided.

The connecting pipe 51, which is connected to the cleaner body 12 side by being removably fitted into and attached to the connecting port body 22, has the connecting port body 22 as shown in FIGS. 4, 11 and 12. A large-diameter outer pipe portion 61 that is insertably and removably inserted into the large-diameter portion 22a, and is integrally and concentrically provided inside this through a plurality of ribs
And a small-diameter inner pipe portion 62 that is inserted and connected in a small-diameter portion 22b as a cylindrical portion of the pipe, and the pipes 61 and 62 are arranged in opposite directions so as to be opposite to each other and are substantially in the axial direction. It has a pair of left and right pivot tube portions 63 that are provided so as to project at a right angle. The pair of pivot tube portions 63 have a cylindrical shape, and flanges 63a that are continuous in the circumferential direction are integrally provided on the open front end edges thereof.

One end of the outer pipe portion 61 is open, and the other end is individually communicated with the pivot pipe portion 63 through a pair of communication ports 64. The tip of the pivot tube portion 63 is open,
The rear end is closed by the inner pipe portion 62. An annular seal member 65 such as an O-ring made of synthetic rubber is attached to the outer peripheral surface of the outer pipe portion 61. As shown in FIG. 4, the outer pipe portion 61
Is a flange portion 61a that integrally projects from the outer peripheral surface thereof.
Is fitted inside the large-diameter portion 22a until it contacts the tip of the large-diameter portion 22a of the connection port body 22. In the connection state by this fitting, the airtightness between the large diameter portion 22a and the outer pipe portion 61 is ensured by the sealing material 65, and the flow passage portion between the inner and outer pipe portions 61, 62 is provided with the ventilation hole 22c. And is communicated with the reflux chamber 26. In addition, the connection port body 22 side is shown in FIG.
As shown in FIG. 5, a bell crank-shaped lock knob 17 biased by a spring 16 is rotatably provided.
A recess 61b provided with the claw 17a on the outer peripheral surface of the outer tube portion 61
The suction port body 13 is prevented from coming off from the connection port body 22 by hooking it on the connection port body 22, and this desorption can be removed by appropriately pressing and rotating the lock knob 17.

Both axial ends of the cylindrical inner tube portion 62, which is longer than the outer tube portion 61, are open. The small diameter portion 22b is attached to the connection port body 22 with the attachment of the communication pipe 51.
The inner pipe portion 62 fitted inside is used as a main suction pipe portion, and is configured to introduce air containing dust into the dust collecting bag 31 through the inside thereof.
A through hole 62c is provided in the peripheral wall of the inner pipe portion 62 as shown in FIGS. This through hole 62
c is directly communicated with the branch pipe 22d,
Air passing through the suction hose 33 is sucked into the dust collecting chamber 23 side through the through hole 62c.

Inner tube portion 62 protruding outside the connection port body 22
The opening at the tip end of the inlet 6 is provided between the pivot tube portions 63.
2a, and an inlet upper wall 66 and an inlet lower wall 67 are respectively projected outward at the upper and lower edges thereof. The pair of left and right inlet end side walls 62b, which form the boundary between the inlet 62a and the pair of pivot pipe portions 63, have a distance between their facing surfaces that is upstream from the inner pipe portion 62 in the air suction direction (see the arrow indicated by a dashed line in FIG. 11). It is formed in a slanted shape so as to spread. This structure reduces wind loss and allows air to enter smoothly.
It is excellent in that it can be sucked into 2a.

As shown in FIGS. 7 to 10, the main body 52 of the suction port body has a main body upper case 71 and a main body lower case 72.
And a main part middle case 73 sandwiched between them are connected by screwing.

A pair of bearings 74 having semicircular recesses on the inner surfaces of the upper and lower cases 71, 72 on the rear side of the middle case 73 of the main part (only the main case lower case 72 side is shown in FIG. 9) are integrally projectingly provided, and the respective pivot tube portions 63 are sandwiched from above and below by the upper and lower bearing portions 74 which are fitted to each other and are rotatably connected. With this connecting structure, the communication pipe 51 is pivotally attached to the rear portion of the main body 52 of the suction port so as to turn up and down, and by this rotation, the main body 52 of the suction port is attached to the surface to be cleaned. You can get a proper posture. The relative rotation of the communication pipe 51 and the suction port body main part 52 is restricted by the inlet lower wall 67 and an upward stopper part 75 provided in the main part lower case 72 between the bearing parts 74 thereof. During rotation, the flange portion 63a and the bearing portion 7
The mating surfaces with respect to 4 are in sliding contact. In FIG. 11, P indicates the center of rotation of the communication pipe 51 and the suction port main body 52.

A blowout chamber 81 is provided inside the main body 52 of the suction port.
And a recovery chamber 82 below the blowing chamber 81, and the main middle case 73 forms a partition wall between the chambers 81 and 82. The blowout chamber 81 includes a rib 83 (see FIG. 3) projectingly provided on the inner surface of the upper case 71 of the main part and the lower case 7 of the main part.
The mating surfaces of the ribs 84 (see FIGS. 8 and 9) protruding from the inner surface of No. 2 are fitted to each other by projections and depressions, and the ribs 83 are provided.
Rib 8 projectingly provided on the inner surface of the upper case 71 of the main part.
5 (see FIG. 7) and the rib 86 (see FIG. 8) protruding from the upper surface of the main part middle case 73 are separated by fitting the mating surfaces into each other. The other ribs 87 to 90 shown in FIGS. 7 to 9 surround one side and the front side of the blowout chamber 81, and these ribs are provided in each case 71 to 73 similarly to the ribs 83 to 86. . The front portion of this enclosure has substantially the same shape as an intake port 91 described later, and is formed right above the intake port 91.

The recovery chamber 82 is divided into a lower main case 72 and a main middle case 73. Both cases 72,
The mating surfaces of 73 are fitted into each other by projections and depressions. An intake port 91 is formed on the bottom wall 72a of the main part lower case 72 so as to face the recovery chamber 82 as shown in FIGS. 9 to 11. The intake port 91 is formed in the width direction of the intake port body 13 (see FIGS. 7 to 11).
In the left-right direction). As shown in FIG. 10, on the bottom wall 72 a of the main part lower case 72, a fixed brush 92 is provided along the rear edge of the intake port 91.
Is installed. The brush 92 is also used as a windproof means for preventing the air blown to the surface to be cleaned through the air intake port 91 from blowing backward toward the suction port body 13.

As shown in FIG. 11, the main part middle case 73
The rear end portion in the center portion in the width direction is bent upward and is fitted into the inner surface of the main portion upper case 71 in a concavo-convex manner, and an arcuate portion 73a is formed in this bent portion. The arcuate portion 73a is the inlet 6 of the communication pipe 51.
It is arranged to face the front side of 2a. Main subordinate case 72
Is provided with a guide 93 having a circular arc surface continuous from both ends in the width direction of the circular arc portion 73a. The arcuate portion 73a and the guide 93 which are continuous with each other guide the movement of the arcuate shutter 94. The shutter 94 having an arc-shaped cross section that is reciprocally moved in association with the up-and-down movement of the communication pipe 51 with respect to the suction port body main portion 52 is provided over the communication pipe 51 and the suction port body main portion 52, and has a rear edge portion thereof. 94
An inlet upper wall 66 of the communication pipe 51 is hooked inside the a.

Therefore, as shown in FIG. 11, the shutter 94 is pulled by the inlet upper wall 66 and is pulled by the inlet upper wall 66 when the communication pipe 51 is in the use posture in which the communication pipe 51 is inclined with respect to the main body 52 of the suction port body, as shown in FIG. When the communication pipe 51 is arranged in the open position shown, and the communication pipe 51 has a right angle with respect to the suction port body 52 when not in use, as shown in FIG. Is hit and pushed by this tube portion 62 to be placed in the closed position. When the shutter 94 is in the open position, the air passage cross-sectional area in the suction air passage B immediately before the inlet 62a is the maximum, and when the shutter 94 is in the closed position, the air passage cross-sectional area is the smallest in the immediately preceding position. (Including a state where the shutter 94 hits the bottom wall 72 and the cross-sectional area of the air passage becomes zero). Therefore,
The shutter 94 is used as an air volume adjusting means for increasing / decreasing the air volume passing through the suction port body 13.

By thus providing the shutter 94 which interlocks when the communication pipe 51 rises above a certain angle, thereby limiting the cross-sectional area of the air passage, as shown in FIG. 3 and FIG. Even when the electric blower 35 is operating when the machine body 12 is placed in a self-supporting posture, the amount of air circulated through the suction port body 13 is reduced, so that the rotary cleaning body 53 is automatically rotated.
It is excellent in that it can slow down or stop the rotation of.

The front portion of the recovery chamber 82 is located directly above the intake port 91 and communicates with this port 91. Collection room 82
The rear part is narrowed so as to be converged at the center part in the width direction and slightly extends rearward, and the extending rear part faces and communicates with the inlet 62a of the inner pipe part 62 of the communication pipe 51. The recovery chamber 82 and the inner flow passage of the inner pipe portion 62 form a suction air passage B communicating with each other. The air blown into the recovery chamber 82 toward the intake port 91 through the air passage B and the air sucked from the surface to be cleaned into the intake port 91 are sucked into the cleaner body 12 side. It has become.

As shown in FIGS. 9 to 11, in the rotary cleaning body 53, one or more blades 102 are attached to the rotary shaft 101 as cleaning members, and supporting shaft supports 103 and 104 are provided at both ends of the rotary shaft 101. The support shafts 1 that are respectively fitted and project from the supports 103 and 104, respectively.
05 are supported by bearings 106, respectively. Therefore, the rotary cleaning body 53 is configured so that the portions other than the bearings 106 at both ends thereof are rotated integrally. The rotary cleaning body 53 has its bearing 106 attached to the bearing holding portions (not shown) provided at both ends in the width direction of the main body lower case 72 so as not to rotate, so that the rotary cleaning body 53 faces the air intake port 91 and recovers. It is located in the chamber 82. Rotating cleaning body 53
When the blade is rotated, the tip of the blade 102 passes through the intake port 91 and contacts the surface to be cleaned.

7 and 8 are provided at the rear of the blowing chamber 81.
As shown in FIG. 5, the pivot pipe portion 63 of the communication pipe 51 is arranged, and the blowout chamber 81 and the flow path between the inner and outer pipe portions 61 and 62 of the communication pipe 51 are connected via these pipe portions 63. ing. As described above, the front part of the blowout chamber 81 faces the main part middle case 73, and the reflux blowout port 54 penetrates through the main part middle case 73 to the width direction of the suction port body main part 52. It is formed along. The recirculation blowout port 54 provided with the rotary cleaning body 53 placed between the intake port 91 blows the air in the blowout chamber 81 to the blade 102, and when the suction port body 13 is pushed forward. When the rotation direction F of the rotating cleaning body 53 that rotates together (see FIG. 11) is defined as the forward direction, the rotation cleaning body 53 is located in front of the rotary shaft 101 of the rotating cleaning body 53 so as to obtain the rotation in the forward direction. The case 73 is opened.

The return air outlet 54 is formed by a slit extending continuously in the width direction of the main inlet body 52. Therefore, the circulation outlet 54 is provided parallel to the axis of the rotary cleaning body 53. The circulation outlets 54 are arranged in the same manner in the width direction of the main body 52 of the suction inlet with the communication pipe 51 as the center. The reflux outlet 54 may be formed by a plurality of discontinuous holes or the like.

In the above structure, the flow passage between the inner and outer pipe portions 61 and 62 of the communication pipe 51, the inner flow passage of the pivot pipe portion 63, and the blowout chamber 81 of the suction port body main portion 52 communicate with each other in this order. The return air passage A is formed, and the electric blower 3
The air discharged from 5 is guided to the return outlet 54 by the return air passage A, and passes through the outlet 54 to the intake port 9
It is set back to 1.

In the figure, 111 is a bumper mounted along the front outer surface of the main body 52 of the suction port body, 112 is a front wheel mounted on the lower case 72 of the main part, and 113 and 114 are rear wheels.

Next, the operation of the air circulation type vacuum cleaner 11 provided with the suction port body 13 having the above construction will be described. At the time of basic use for mainly cleaning the floor surface using this electric vacuum cleaner 11, as shown in FIG. 1, the connecting pipe 22 of the suction body 13 is inserted and connected to the connection body 22 of the cleaner body 12. In this state, power is supplied to the electric blower 35 via the power cord rewound from the cord reel 40, the blower 35 is operated, and the suction port body 13 is brought into contact with the surface to be cleaned such as the floor surface, while the handle 14 It is used by moving the entire vacuum cleaner 11 through the. In this basic usage mode, the suction hose 33 is held in a non-use state by having its tip end supported by the hose support 49.

At the time of use, dust contained in suction air (indicated by a dotted arrow in FIGS. 1 and 11) flowing into the dust collecting bag 31 while being guided to the suction air passage B of the suction port body 13 The air captured by the dust collecting bag 31 and passing through the dust collecting bag 31 further passes through the filter support 32 and is sucked into the electric blower 35, and then passes through the air outlet 41 of the motor cover 39 and returns to the return chamber 26. A part of it is discharged to the outside of the cleaner main body 12 from an exhaust small hole (not shown) through the exhaust chamber 24 and an exhaust port (not shown).

The exhaust gas flowing into the reflux chamber 26 is connected to the connection port body 2.
It is guided to the return air passage A of the suction port body 13 from the second ventilation hole 22c, and is blown from the return air outlet port 54 toward the collection chamber 82 side of the suction air passage B toward, for example, the intake port 91. Such an air flow is shown by a solid arrow in FIGS. Therefore, the blown air is blown to the blade 102 of the rotary cleaning body 53 that is rotatably arranged immediately below the recirculation outlet 54 to rotate the cleaning body 53 clockwise in FIG. 11, and immediately after that. After being blown onto the surface to be cleaned facing the intake port 91, the dust on the surface to be cleaned is lifted up and sucked into the recovery chamber 82 through the intake port 91 and collected in the suction air passage B. Then, along with this collection, the dust is collected in the dust collecting chamber 23 of the cleaner body 12.

As the air discharged from the electric blower 35 is collected and circulated by the suction port body 13 as described above,
With that momentum, the outside air between the bottom wall 72a of the suction port body 13 and the surface to be cleaned is sucked into the suction port 91 together with the dust, and the rotary cleaning body 53 is rotated using the circulating air. It is possible to perform air circulation type cleaning while scratching out dust on the surface to be cleaned.

It is needless to say that such a basic use form is mainly suitable for cleaning the floor surface, but in this use form, the tip end portion of the suction hose 33 is fitted to the hose support 49 as described above. Since the hose support 49 communicates with the upstream side of the dust collecting bag 31 as a filter, the outside air is sucked through the suction hose 33 because the hose support 49 is held in a closed and closed state. Is prevented. Therefore, in the basic use mode, the first suction system, that is, the collection chamber 82 of the main body 52 of the suction port body 13 to the collection chamber 23 of the dust collection chamber 23 via the inner pipe portion 62 of the communication pipe 51. The cleaner body 12 is passed through the path leading to the dust bag 31.
Since the amount of air collected on the side does not decrease, the intake port 91
The dust suction performance does not deteriorate.

In this air circulation type cleaning, since most of the air discharged from the electric blower 35 is circulated between the cleaner body 12 and the suction port body 13 as described above, the electric blower 35 is generated. The heat generated increases the temperature of the circulating air. Therefore, since such high-temperature air passes into the dust collection chamber 23, the circulating air can kill harmful microorganisms in the dust collection chamber 23.
Moreover, since the circulating air of high temperature is blown onto the surface to be cleaned from above immediately after rotating the rotary cleaning body 53, it is possible to expect a killing effect on harmful microorganisms contained in the surface to be cleaned.

The suction hose 33, which communicates with the upstream side of the dust collection chamber 23, is expandable and flexible, and the grip tube 33a forming the tip thereof is provided on the outer surface of the cleaner body 12. It can be arbitrarily removed from the projecting hose support 49.
A second suction system can be formed in addition to the above suction system. The second suction system includes a suction hose 33, a branch pipe 22d of the connection port body 22, a through hole 62c of an inner pipe portion 62 of the communication pipe 51, and an inner pipe portion 62 to collect dust in the dust collecting chamber 23. It is formed along the path to the bag 31.

As described above, the tip end portion of the suction hose 33 is removed from the hose support 49, and the hose 33 is put in use, whereby the suction port body 1 forming the first suction system is formed.
Suction hose 33 without closing the suction flow passage in 3
The outside air can be sucked in through. When the suction hose 33 is used, the auxiliary suction port body in which the opening of the grip tube 33a at the tip thereof is directly connected or is appropriately inserted and connected to the grip tube 33a by utilizing the flexibility and stretchability of the hose 33 itself. The tip end opening of 48 is made to face a relatively high cleaning place such as a table or a wall, or a desired cleaning place such as around a shovel of a shoji screen or a glass of a door, and dust can be sucked from the place. Therefore, the suction port body 1 is much larger in shape than the grip tube 33a and is mainly adapted for floor cleaning.
In the case of No. 3, it is possible to easily clean a place where cleaning is not appropriate by using the suction hose 33 if necessary. Therefore, the vacuum cleaner 11 having the above-described configuration is convenient because the suction port body 13 and the suction hose 33 can be selectively used according to the cleaning location.

The suction hose 33 is provided so as to communicate with the upstream side of the dust bag 31 in addition to the suction port body 13. Even when the suction hose 33 is used as described above, the suction hose 33 can be sucked. Without closing the first suction system via the mouthpiece 13, the first suction system can still maintain air circulation between the cleaner body 12 and the suction mouthpiece 13. Therefore, even in the use mode in which the suction hose 33 is used, the harmful microorganisms in the dust collection chamber 23 can be killed by the air circulated in the dust collection chamber 23 due to the temperature raised by the heat generated by the electric blower 35.

As described above, the suction hose 33 can be used for cleaning in any posture of the cleaner body 12, but normally, the cleaner body 12 is in a self-supporting posture in which it is not restricted to support it. As shown in FIGS. 3 and 4, the cleaner body 12 is raised and placed. In the posture in which the cleaner body 12 is erected in this manner, the inner pipe of the communication pipe 51 is attached to the rear edge portion 94a of the shutter 94 as the communication pipe 51 is arranged at a right angle with respect to the main body 52 of the suction port body. The portion 62 hits and is pushed by the pipe portion 62, and the shutter 94 is arranged at the closed position. The shutter 94 in this closed position does not stop the circulation of the air,
The air passage cross-sectional area of the suction air passage B immediately before the inlet 62a is 1 of the air passage cross-sectional area at the time of normal use.
It is positioned so as to be narrowed down to 0% to 95%.

As described above, the cleaner 94 and the suction port body 1 are provided by the shutter 94 which is interlocked with the communication pipe 51 when it is tilted.
Since it is possible to limit the amount of circulating air to a small amount while maintaining the circulation of the air over 3, the influence of the intake negative pressure on the suction hose 33 used in this state increases and a large amount of air passing through the suction hose 33 is secured. , Suction hose 3
The dust suction power at 3 can be increased. Moreover, limiting the air passage cross-sectional area of the first suction system as described above when the cleaner body 12 is placed in a self-supporting position can reduce the circulating air volume, so that the rotation cleaning body 53 automatically rotates. Can be decelerated or stopped, and therefore the adverse effect on the same place on the floor surface due to the scraping action of the rotary cleaning body 53 can be reduced.

When the cleaner body 12 is placed in a normal use posture in which the cleaner main body 12 is inclined from the self-supporting state to the surface to be cleaned without using the suction hose 33, communication with the main body 52 of the suction port at that time is performed. With the relative rotation of the pipe 51, the shutter 94 releases the blocking state of a part of the suction air passage cross-sectional area of the first suction system, and the cleaner body 12 and the suction port body 1
Since a large amount of circulating air volume over 3 is secured,
It is possible to carry out the usual air circulation type cleaning realized through the suction system.

In the first embodiment, the dust collection chamber 2
3 is provided with a connection port body 22 into which a communication pipe 51 on the suction port body 13 side is inserted, and serves as a suction pipe portion that guides the intake air flow of the communication pipe 51 inserted into this connection port body 22. Since the suction hose 33 is communicated with the inner pipe portion 62, it is not necessary to separately provide the connection ports for both the first suction system and the second suction system. Therefore, in the structure in which dust is sucked not only from the suction port body 13 side but also from the suction hose 33 side, the same connection port body 22 can be shared, and the structure is simple.

Moreover, in the commonalization of such parts,
A branch pipe 22d, to which the suction hose 33 is connected, is provided in the cylindrical portion of the connection port body 22 in which the inner pipe portion 62 that guides the suction air is inserted into the dust collection chamber 23, that is, the small diameter portion 22b, and communicates with this branch pipe 22d. Since the through hole 62c is opened in the peripheral surface of the inner pipe portion 62 to connect the suction hose 33 and the inner pipe portion 62, the structure can be simplified when the same connection port body is shared.

The present invention is not limited to the above-mentioned embodiment, and can be applied to a canister type or a handy type air circulation type vacuum cleaner, and the rotary cleaning body may be omitted in the present invention. Good.

Further, in the present invention, the suction hose 33 may be provided so as to communicate with the upstream side of the filter in the dust collecting chamber 23. For this reason, for example, without using a dust collecting bag, In the configuration in which a flat filter is arranged in the rear part or the like, a connection port body extending from the dust collection chamber to the outside of the cleaner main body is provided separately from the connection port body 22 on the upstream side of the filter, and suction is performed there. You may connect a hose.

[0062]

The present invention is carried out in the form as described above, and has the following effects.

According to the air circulation type electric vacuum cleaner of the first to fourth aspects of the present invention, in addition to the suction port body mainly for cleaning the floor surface, this suction port body can be installed in a place where cleaning is not appropriate. Equipped with a suction hose suitable for cleaning, ensure air circulation between the vacuum cleaner body and suction port even when using this hose, and pass circulating air whose temperature is raised by the heat generated by the electric blower to the dust collection chamber. Because you can
While maintaining the killing performance of harmful microorganisms in the dust collecting chamber, it is possible to easily clean the places to be cleaned other than the floor surface and improve the usability.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a configuration of an entire upright type air circulation type vacuum cleaner according to a first embodiment of the present invention with a part thereof cut away.

FIG. 2A is a perspective view showing a cleaner body of the electric vacuum cleaner according to the first embodiment. FIG. 3B is a perspective view showing the cleaner body of the electric vacuum cleaner according to the first embodiment together with the auxiliary suction port body.

FIG. 3 is a cross-sectional view showing a cleaner body and a suction port body of the electric vacuum cleaner according to the first embodiment.

FIG. 4 is an enlarged cross-sectional view showing a structure around a suction port body of the electric vacuum cleaner shown in FIG.

FIG. 5 is a perspective view showing a structure around a dust collecting chamber of the vacuum cleaner body of the electric vacuum cleaner according to the first embodiment with a part thereof cut away.

FIG. 6A is a side view showing a configuration of a connection port body included in the cleaner body of the electric vacuum cleaner according to the first embodiment.
FIG. 3B is a cross-sectional view showing the configuration of the connection port body. FIG. 6C is an arrow view of the connection port body as viewed from the direction of arrow X in FIG. FIG. 6D is an arrow view showing the connection port body as seen from the direction of arrow W in FIG.

FIG. 7 is a plan view showing the configuration of the suction port body shown in FIG.

FIG. 8 is a plan view showing the structure of the suction port body shown in FIG. 4 with the upper case of the main part thereof removed and a part thereof shown in section.

9 is a plan view showing the structure of the suction port body shown in FIG. 4 with its main part upper case, main part middle case, and communication pipe removed.

FIG. 10 is a bottom view showing the configuration of the suction port body shown in FIG.

11 is a cross-sectional view taken along the line ZZ in FIG.

FIG. 12 (A) is a side view showing a communication pipe provided in the suction port body shown in FIG. 4. FIG. 12B is a sectional view taken along line YY in FIG. (C) is a front view showing a partial cross section of a communication pipe provided in the suction port body shown in FIG. 4.

[Explanation of symbols]

11 ... vacuum cleaner, 12 ... Vacuum cleaner body, 13 ... Suction mouth, 22 ... Connection mouth, 22a ... large-diameter portion of connection port body, 22b ... a small diameter portion (cylindrical portion) of the connection port body, 22c ... Vent hole, 22d ... Branch pipe, 23 ... Dust collection chamber, 31 ... Dust bag (filter), 33 ... suction hose, 33a ... a gripping tube for the suction hose, 35 ... Electric blower, 49 ... Hose support, 49a ... closed cylinder part, 51 ... communication pipe, 52 ... Suction mouth main part, 54 ... reflux outlet 61 ... Outer pipe part, 62 ... Inner pipe part (suction pipe part), 62a ... inlet of the inner pipe section, 62c ... a through hole in the inner pipe portion, 63 ... Axis tube part, 66 ... the upper wall of the entrance, 71 ... upper case of main part, 72 ... Main subordinate case, 73 ... Main case middle case, 82 ... collection room, 83 ... Blowout room, 91 ... Intake port, 94 ... Shutter (air volume adjusting means), 94a ... the rear edge of the shutter, A ... Return airway, B ... Suction air passage,

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 5/14 A47L 5/28 A47L 9/08

Claims (4)

(57) [Claims] 1. An air blower, which is built in a cleaner body, is sucked in by an operation of an electric blower through an intake port of a suction port body to pass through a filter in an upstream dust collecting chamber of the electric blower to trap the dust. In an electric vacuum cleaner that returns the air discharged from the electric blower to the intake port and collects and circulates the returned air, the flexibility of communicating with the upstream side of the filter. And a hose support for removably fitting the tip of the hose to close the tip of the suction hose is provided in the cleaner body. 2. A connection port body, into which the communication pipe on the suction port body side is inserted, is provided on the upstream side of the dust collection chamber, and the communication port which is inserted into the connection port body and guides an intake air flow to the dust collection chamber. The air circulation type vacuum cleaner according to claim 1, wherein the suction hose is connected to the suction pipe portion of the pipe. 3. A branch pipe is provided in the cylindrical portion of the connection port body into which the suction pipe portion is inserted, and a through hole communicating with the branch pipe is opened on the peripheral surface of the suction pipe portion and the branch pipe is connected to the branch pipe. The air circulation type vacuum cleaner according to claim 2, wherein the suction hose is connected to communicate the suction pipe portion and the suction hose. 4. An upright-type air circulation type vacuum cleaner, wherein the suction port body is tilted relative to the suction port body main portion having the suction port. And a communication pipe that is rotatably connected to the connection port body and is inserted into the connection port body, and a suction air passage in association with an operation of raising and lowering the cleaner body with respect to the communication port body with respect to the main body of the suction port body. An air flow rate adjusting means for increasing or decreasing the cross-sectional area upstream of the branch pipe, and when the cleaner body is raised, the air flow rate adjusting means blocks a part of the suction air passage cross-sectional area. The air circulation type vacuum cleaner according to any one of claims 1 to 3.