JP2000197593A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation type vacuum cleaner wherein the flow rate of a stream of blown-off air directed to a suction air port body is increased and a motor-driven blower can be controlled. SOLUTION: A cleaner body 1 includes a suction port 71a and a delivery port 75 respectively communicating with suction opening 115 and a blowoff port 127 of a suction port body 100, a dust collection chamber 20 with a dust collection bag (dust collector) 30, blower chamber 40, return passage 17 communicating with the port 75, and an exhaust port 10d for exhausting the exhaust air from the chamber 40. A motor-operated blower 50 comprising a motor 51 and a fan part 60 is disposed in the blower chamber 40. A delivery port 65 is provided in the fan part 60 to directly deliver the suction air stream into the passage 17, while the exhaust air discharged into the chamber 40 is exhausted from the exhaust port 10d through a discharge port 57 provided in the motor 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating electric cleaning system in which dust is sucked together with a suction airflow by a suction action of an electric blower, dust is removed by a dust collector, and the suction airflow is returned to the suction port as exhaust air. About the machine.

[0002]

2. Description of the Related Art Conventionally, dust is sucked together with a suction airflow from a suction opening of a suction port body connected to a vacuum cleaner by a suction action of an electric blower, and the sucked dust is removed by a dust collector, and then the suction airflow is removed. The air is returned to the suction port body again as the exhaust air, and is blown from the outlet provided near the suction opening onto a surface to be cleaned (hereinafter referred to as a floor surface) such as a carpet or a tatami mat to blow out dust existing on the floor surface. 2. Description of the Related Art A circulating vacuum cleaner (hereinafter referred to as a circulating vacuum cleaner) that sucks out blown dust, that is, blown dust, together with a suction airflow is known.

[0003] The recirculation of exhaust air and the exhaust to the outside in this type of circulation type vacuum cleaner are performed as follows. In other words, the exhaust air exhausted from the electric blower is once exhausted to a blower room for accommodating the electric blower provided in the cleaner main body, and a part of the exhaust air is returned to the suction opening body, and the exhaust air is returned to the cleaner main body. A return passage, an exhaust hose (a type in which the suction port body is not directly connected to the cleaner body) connected through a communication hole formed in the peripheral wall of the blower chamber formed in the suction port body, and a discharge port of the suction port body provided in the suction port body. The air is discharged through a return path composed of a blow-out flow path for guiding the air, and the other part of the exhaust air (the remaining part of the exhaust air to be recirculated) is discharged to the outside through an outlet formed in the peripheral wall of the blower chamber. And an exhaust path formed by a cord reel chamber or the like for guiding exhaust air to an exhaust port provided in the cleaner body.

The length of the exhaust passage is considerably shorter than the length of the recirculation passage, and the average cross-sectional area is large. For this reason, the flow path resistance (resistance for preventing the flow of air) of the return path is considerably larger than the flow path resistance of the exhaust path. On the other hand, in order to blow out the dust on the floor efficiently, it is necessary to increase the amount and flow velocity of the exhaust air blown out from the outlet of the suction opening body, that is, the blown air.

However, since the flow path resistance of the recirculation path is large as described above, it is necessary to increase the pressure in the exhaust chamber in order to increase the flow rate and flow velocity of the blown air. It is necessary to suppress exhaust to the outside by increasing the resistance.

Further, since the exhaust air acts to cool the electric motor when passing through the electric blower,
If the flow rate is reduced by suppressing the amount of exhaust to the outside, the amount of air newly sucked from the suction opening, that is, the amount of outside air sucked separately from the exhaust air blown out from the outlet, decreases. The recirculated or circulating exhaust air is heated by the repeated circulation and rises in temperature, and a situation arises in which the motor cannot be sufficiently cooled.

Therefore, the amount of the exhaust air to be recirculated and the amount of the exhaust air to the outside are adjusted by adjusting the pressure in the blower room, and the flow and the flow rate of the sufficient blown air and the amount of the exhaust air to the outside are appropriately divided. It is desirable to make adjustments, but this adjustment is difficult.

When the motor is a commutator motor, the exhaust air passing through the inside of the motor contains carbon powder generated by sliding contact between the carbon brush for supplying power to the commutator of the rotor of the motor and the commutator. Because it is contained, this carbon powder is blown out to the floor together with the recirculated exhaust air,
There is a risk of soiling the floor, and in order to prevent this, it is necessary to provide a filter for removing this carbon powder in the return path, etc., and if this filter is provided, the flow path resistance of the return path will increase further. In addition, it becomes difficult to properly adjust the flow rate and the flow rate of the sufficient blown air and the blowout amount of the exhaust wind to the outside.

[0009]

As described above, the conventional circulation-type vacuum cleaner divides the exhaust air once exhausted into the blower chamber, and shunts the exhaust air from the outlet through a return path having a large flow path resistance. There is a problem that it is very difficult to blow out the blown air at the flow rate and the flow velocity, and it is extremely difficult to adjust the flow rate of the exhaust air for cooling the motor, and when the motor is a commutator motor, it passes through the inside of the motor. Since the exhaust air contains carbon powder, there is a problem that it is necessary to provide a filter for preventing the floor surface from being stained by the carbon powder, and furthermore, if this filter is provided, the return path is further increased. In addition, there is a problem that it is difficult to properly adjust the flow rate and the flow velocity of the above-described sufficient blown air and the amount of the blown exhaust air to the outside.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an invention according to claim 1 is a suction port which is connected to a suction opening and a discharge port provided in a suction port body, respectively. And a discharge port, a dust collection chamber communicating with the suction port, a blower chamber provided downstream of the dust collection chamber, a return passage communicating with the discharge port, and exhaust air discharged from the blower chamber to the outside. A vacuum cleaner main body having an exhaust port, a dust collector disposed in the dust collection chamber, a fan rotated by an electric motor, and a fan unit including a fan cover for accommodating the fan. An electric blower provided in the fan section for diverting the sucked airflow and discharging it to the return path, and an electric blower provided in the electric motor and having a discharge port for discharging the sucked airflow to the blower chamber. And it is obtained by a vacuum cleaner.

As described above, according to the first aspect of the present invention, there is provided a suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, a dust collection chamber which communicates with the suction port, A blower chamber provided downstream of the dust chamber, a return path communicating with the outlet, and an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside are disposed in the blower chamber of the cleaner body. The fan section of the electric blower having a fan section including a fan rotated by an electric motor and a fan cover for accommodating the fan, a discharge port for shunting the suctioned airflow and discharging the diverted suction airflow to the return path, Since the motor is provided with a discharge port for discharging the suction airflow to the blower chamber, the inside of the fan unit and the return path communicate with each other without passing through the inside of the motor having a large flow path resistance. In addition to reducing the flow path resistance of the road, even when the electric blower is a commutator motor, it is possible to blow out the blowout air with a sufficient flow rate and flow rate that does not contain carbon powder from the blowout port, Since the suctioned airflow is split by the fan unit, it is not necessary to increase the flow path resistance of the exhaust path to suppress the flow rate of the exhaust air to be exhausted. This has the effect that the motor can be reliably cooled because it can be made large and the temperature rise of the circulating exhaust air can be suppressed.

According to a second aspect of the present invention, the discharge port in the first aspect of the invention is a vacuum cleaner formed in a fan cover facing the outer periphery of the fan.

According to the second aspect of the present invention, the discharge port in the first aspect of the present invention is formed in the fan cover facing the outer periphery of the fan. Further, since the suction airflow can be smoothly discharged to the recirculation path as the exhaust air, the blowout air having a sufficient air volume and flow velocity can be blown out from the air outlet.

According to a third aspect of the present invention, there is provided a suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, a dust collecting chamber communicating with the suction port, and a dust collecting chamber. A blower chamber provided on the downstream side of the chamber, a return path communicating with the outlet, a vacuum cleaner body having an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside, and disposed in the dust collection chamber. And a fan unit including a fan rotated by a motor and a fan cover for accommodating the fan, the fan unit is disposed in the blower room, and provided near a boundary between the motor and the fan unit. The electric vacuum cleaner includes a discharge port for diverting the sucked airflow and discharging the diverted suction airflow to the return passage, and an electric blower provided in the electric motor and having a discharge port for discharging the suction airflow to the blower chamber.

As described above, according to the third aspect of the present invention, a suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, a dust collecting chamber which communicates with the suction port, A blower chamber provided downstream of the dust chamber, a return path communicating with the outlet, and an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside are disposed in the blower chamber of the cleaner body. In a motor-driven blower having a fan unit including a fan rotated by a motor and a fan cover for housing the fan, the suction airflow is divided and discharged to the return path near a boundary between the motor and the fan unit. Since the discharge port is provided and the discharge port for discharging the suction airflow to the blower chamber is provided in the electric motor, the inside of the fan unit and the recirculation path can pass through the inside of the electric motor having a large flow path resistance. The flow path resistance of the recirculation path can be reduced because it is connected without any flow, and even if the motor is a commutator motor, the blowout air with sufficient flow rate and flow rate that does not contain carbon powder can be blown out from the blowout port. In addition, since the suction airflow sucked by the fan section is divided by the fan section, it is not necessary to increase the flow path resistance of the exhaust path to suppress the flow rate of the exhaust air to be exhausted. Thus, the amount of new air to be generated can be increased, and the temperature of the circulating exhaust air can be suppressed from rising, so that the electric motor can be reliably cooled.
Further, since the discharge port is provided in the vicinity of the boundary between the electric motor and the fan section, the discharge port has an effect of preventing a decrease in suction performance.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a handy type, that is, a hand-held type circulating vacuum cleaner will be described with reference to FIGS.

As shown in FIG. 1, the circulation type vacuum cleaner has a suction port 100, which will be described later, detachably provided at a front portion of the cleaner 1, which is a main body of the cleaning apparatus.
In addition, dust existing on the floor surface such as a carpet, a tatami mat or a board is sucked together with the suction airflow through the suction port 00, and the exhaust air that has been removed is circulated through the suction port body 100 to blow out the dust for cleaning.

The cleaner 1 has a housing 10 formed by joining a pair of left and right cases 11 made of synthetic resin to each other with joining edges 11a thereof facing each other and connecting them with screws (not shown). Dust collection bag 3 as a dust collection device housed in dust collection chamber 20 formed in body 10
0, an electric blower 50 provided in the blower room 40, a code reel 85 provided in the reel room 80, and the like.

The pair of cases 11 forming the casing 10 are integrally formed with required partition walls 12 to 15 with which the ends thereof abut when the two cases 11 are connected.

In the housing 10, the partition wall 15 formed at the rearmost position facing the bottom wall 10 a extends in the front-rear direction (the side where the dust collection chamber 20 is formed in the following description). (The side on which the reel chamber 80 is provided is referred to as the rear side), the partition wall 16 formed along the front side, the partition wall 12 formed on the front side, and the ventilation holes formed behind the partition wall 12. The partition wall 13 on which the 13a is formed
The dust collecting chamber 20 is formed by this and an opening 21 is formed above the dust collecting chamber 20, and the opening 21 is always closed by an opening / closing lid 22. Further, a through hole 23 is formed in the partition wall 12, and
A seal packing P is attached to the through hole 23. On the dust collecting chamber 20 side of the partition wall 12, a fitting groove 24 for positioning a mouth frame 32 of the dust collecting bag 30 described later in detail is formed.

Further, the bottom wall 1 is provided on the bottom side of the housing 10.
0a, a partition wall 16 and a peripheral wall of the right and left cases 11 to form a return path 17.
Numeral 7 communicates with the inside of a fan unit 60 to be described later through a communication hole 16a formed in the partition wall 16.

The partition wall 14 is formed behind the partition wall 13 so as to form a storage gap G. The partition wall 14 has an opening 14a formed therein. Is provided with a filter member 37a made of urethane foam or the like having air permeability and a filter 37 made of a filter frame 37b.

The blower room 40 is provided with a partition wall 14,
The partition wall 15, the ceiling wall 10 b of the housing 10 and the side walls are formed to surround the partition wall 15, and the central portion of the partition wall 15 constituting the blower room 40 has a concave support portion 15.
a, and an outlet 15b through which the suction airflow sucked by the electric blower 50 flows out as exhaust air.

Further, the reel chamber 80 is provided with the partition wall 1.
5, formed by the rear wall 10c of the housing 10 and the housing 10, that is, both side walls, on the downstream side of the blower room 40. The rear wall 10c of the housing 10 is provided with an exhaust port 10d formed in a slit shape as shown in the figure.

The outlet 15b and the reel chamber 8
Reference numeral 0 denotes an exhaust path for guiding exhaust air to the exhaust port 10d.

In the dust collecting chamber 20, the dust collecting bag 30 as a dust collecting device is detachably provided. The dust collecting bag 30 is composed of a paper bag 31 having air permeability and a paper bag 31.
And an opening 33 corresponding to the opening of the seal packing P provided in the through hole 23 formed in the partition wall 12 is formed at the center of the opening frame 32. Have been. And this dust bag 3
0, the lower end and the left and right edges of the mouth frame 32 are fitted into fitting grooves 24 formed in the partition wall 12, and
The upper end is locked by the locking member 35 so that the upper end is pressed against the seal packing P and hermetically attached.

An opening 18 is formed at the front of the housing 10, that is, at the front of the partition wall 12, and a suction port member 70 is attached to the opening 18. The suction port member 70 is formed in the through hole 2 formed in the partition wall 12.
3, a small-diameter cylindrical portion 71 having a suction port 71a having the same diameter as that of the cylindrical portion 71, and a circular flange portion 72 formed at a distal end portion of the cylindrical portion 71.
And a large-diameter cylindrical portion 73 having a bottom wall as the bottom wall, and an opening 74 at the distal end of the large-diameter cylindrical portion 73 opens at the distal end of the housing 10. Further, the flange portion 72 is formed with an outlet 75 for sending out exhaust air.

Then, the suction port member 70 is connected to the housing 1.
In a state where the small-diameter cylindrical portion 71 is attached to the bottom, the tip portion of the small-diameter cylindrical portion 71 is tightly sealed with a seal packing P provided in the through-hole 23.

A handle 19 is formed in an upper portion of the casing 10 between the blower chamber 40 and the reel chamber 80. A power switch S for driving and stopping the electric motor 51 of the electric blower 50 is provided at a front portion of the handle 19.

Next, the electric blower 50 provided in the blower room 40 will be described. This electric blower 50
Is composed of a motor 51 and a fan unit 60 provided at the front of the motor 51.

As shown in FIG. 3, the electric motor 51 includes a main frame 52a formed in a bottomed cylindrical shape, and a sub-frame 52b formed in a rectangular shape by being bridged and attached to an opening of the main frame 52a. A frame 52 consisting of
A stator core 53 provided in the main frame 52a and wound with a stator winding 53a, and a rotating shaft 55a supported by ball bearings 54a and 54b provided on the main frame 52a and the sub-frame 52b, respectively. , A rotor 55 including a rotor core 55c around which the rotor winding 55b is wound.

A commutator 55d is provided on the rotating shaft 55a.
A pair of brush holders 56 is mounted on the main frame 52a. Carbon brushes 56a are respectively mounted on the brush holders 56 by coil springs 56b (only one side is shown). Are pressed against the commutator 55d and housed.

In the main frame 52a, outlets 57 are formed at both sides where the brush holder 56 is mounted.
After the suction airflow sucked from the fan unit 60 described later passes through the main frame 52a, as shown in FIG.
It is exhausted as exhaust air at zero. The exhaust air passing through the main frame 52a cools the electric motor 50.

The exhaust air exhausted from the exhaust port 57 to the blower chamber 40 is exhausted to the outside from the exhaust port 10d through the outlet 15b formed in the partition wall 15 and the reel chamber 80. (See FIG. 1).

As shown in FIG. 3, the fan unit 60 is a centrifugal fan 61 which is a fan attached to a rotating shaft 55a of the rotor 55 by a nut 61a, and is located downstream of the centrifugal fan 61. Secondary frame 5
The fan 2 includes a fan fixing fan 62 attached to the screw 2a by a screw 62a, a fan cover 63 for covering or storing the centrifugal fan 61 and the fixed fan 62, and the like.

An opening 64 is formed at the front of the fan cover 63, that is, at the dust collection chamber 20 side.
A discharge port 65 is formed at a lower portion of the outer peripheral wall, that is, on the side of the return passage 17 as shown in FIG. In addition, this discharge port 6
5 faces the outer periphery of the centrifugal fan 61 and faces the communication hole 16a formed in the partition wall 16,
Further, a through hole 41a for communicating the discharge port 65 with the communication hole 16a is formed in the buffer body 41 for supporting a fan cover 63, which will be described later. A part of the suction airflow sucked by the centrifugal fan 61 is discharged or exhausted to the return passage 17.

The discharge port 65 is directly connected to the return path 1 without passing through the inside of the motor 51 having a large flow path resistance.
7, the flow path resistance of the return path can be reduced.

Since the electric blower 50 is configured as described above, when the electric motor 51 is driven and the centrifugal fan 61 rotates, the electric fan 50 is sucked from the opening 64 of the fan cover 63 by the suction action of the centrifugal fan 61. A part of the generated air, that is, the suction airflow is rectified by the stationary fan 62 and flows into the main frame 52a of the electric motor 51 through the flow path formed on the outer periphery thereof, and the electric motor 51, that is, the stator core 53, the stator winding The wire 53a, the rotor core 55c, the rotor winding 55b, etc. are cooled and exhausted from the exhaust port 57 into the blower chamber 40, and the remaining suction airflow passes through the discharge port 65 and the buffer 41. Hole 41a, communication hole 16
The liquid is discharged to the return path 17 through the line a.

The exhaust air discharged from the discharge port 65 and discharged to the recirculation path 17 is discharged directly to the recirculation path 17 without passing through the electric motor 50. Therefore, the flow path resistance is small and smoothly flows to the recirculation path 17. It will be leaked.

The electric blower 50 supports the front portion, ie, the fan cover 63 of the fan portion 60, and the cushioning member 41 made of elastic rubber or the like having a sealing function.
And a buffer 42 made of elastic rubber or the like that supports the rear protruding portion 52c of the electric motor 51 and is accommodated in the blower room 40.

The cord reel device 85 provided in the reel chamber 80 has a winding frame 86 around which a cord 87 is wound, and the winding frame 86 is attached so that the cord 87 is always wound around the winding frame 86. The cord 87 is made of a spring (not shown) which is energized.
A power plug 88 is attached as shown in FIG.

Next, the suction port body 100 connected to the suction port 71a will be described. This suction port body 100
Is composed of a suction port main body 101 and a connecting pipe 102 rotatably attached to the suction port main body 101.

As shown in FIG. 1, the suction port main body 101 is composed of a main body case 103 including a lower case 110 and an upper case 120. The main body case 103 is provided with the connection pipe 102. ing.

As shown in FIG. 1, the lower case 110 has a bottom wall 111, a front wall 112, a rear wall 113, and left and right side walls 114 formed integrally with the bottom wall 111.
(See FIG. 2). The upper case 120 similarly has a ceiling wall 121 as a bottom wall, a front wall 122 formed integrally with the ceiling wall 121, a rear wall, and left and right side walls (all are not shown), and is opened at a lower part. The upper case 120 and the lower case 110 are formed in the shape of a box with a bottom, and the upper case 120 and the lower case 110 are connected to each other with opening edges thereof and integrally connected by a connecting screw (not shown).
3 are formed.

The bottom wall 11 of the lower case 110
1 is in a direction perpendicular to the plane of the paper of FIG.
(In the left-right direction), a suction opening 115 for sucking dust together with the suction airflow is formed.

As shown in FIG. 1, the lower case 110 has a substantially U-shaped partition wall 130 composed of an upper wall 131, a front wall 132, and a lower wall 133. The partition wall 13 is provided on the ceiling wall 121 of the case 120.
0 hanging wall 125 airtightly contacting the end of upper wall 131
Are formed.

Then, the lower case 110 and the upper case 1
In a state where the main body case 103 is assembled by connecting the two, the partition 130, the hanging wall 125, and the upper case 120 form an outlet air passage 126 as shown in FIG. The outlet air passage 126 communicates with an outlet 127 formed to open near the front of the suction opening 115.

The exhaust air blown out from the outlet 127 is applied to the floor, that is, the carpet, as shown by an arrow a in FIG.
Dust blown on a tatami mat or the like, and blows up between the furs of the carpet, etc., and the blown-up dust is sucked into the dust collecting chamber 20 together with the suction airflow from the suction opening 115 as shown by an arrow b. Therefore, cleaning can be performed efficiently.

As shown in FIG. 2, the lower case 110 has a partition wall 116 at an intermediate portion in the left-right direction, which is continuous with the rear wall 113 and is opposed to each other. As shown in the figure, a fitting recess 117 having a semicircular shape forming one of the fitting bearings is formed.

A partition (not shown) is formed on the upper case 120 in correspondence with the partition 116 formed on the lower case 110. The partition is formed on the partition 116 of the lower case 110. A semicircular fitting recess (not shown) that forms the other of the fitting bearings is formed.

The bottom wall 111 of the lower case 110
Brush 13 on the lower rear side of the
5 are attached.

Next, the connection pipe 102 will be described.

As shown in FIGS. 1 and 2, the connecting pipe 102 has a connecting pipe section 141 having a suction air passage 141a communicating with a suction opening 115 formed in the main body case 103, and this connecting pipe section. A cylindrical fitting cylinder 142 integrally formed by projecting to both sides of the front end of 141 and having an inside as a passage 142a, formed along the longitudinal direction of the connection pipe 141, and an opening 143a at the rear end. And a large-diameter cylindrical portion 144 provided so as to form an annular passage 143 between itself and the pipe wall of the connecting pipe portion 141.
The passage 142a and the annular passage 143 function as an exhaust air passage, and the exhaust air passage communicates with the outlet air passage 126.

The connection pipe 102, that is, the connection pipe section 141
As shown in FIG. 1, the upper and lower portions of the distal end portion are formed on an arc wall 146. The arc wall 146 is formed on the lower case 110 and the upper case 120 with the arc walls 110a, 120a.
It is configured to rotate while sliding.

A fitting groove 142b is formed on the outer periphery of the distal end portion of the fitting cylinder 142.
The semi-circular fitting recess 117 forming one of the fitting bearings formed on the partition 116 of the lower case 110 and the fitting recess (not shown) formed on the partition (not shown) of the upper case 120 are rotatable. It fits. Then, the fitting recess 117 of the lower case 110 and the fitting recess (not shown) of the upper case 120 are fitted into the fitting groove 142b, and the lower case 110 and the upper case 1 are fitted.
The connection pipe 102 is attached to the main body case 103 by connecting the two. The connection pipe 102 can be rotated up and down relative to the main body case 103 within a predetermined angle in the attached state. I have.

Further, on the rear end side of the connection pipe portion 141 from the substantially middle portion, a fitting portion 141b formed in a tapered shape that becomes thinner toward the rear end is provided.
41b is attached to the housing 10 by fitting it into the through hole of the cylindrical portion 71 of the suction port member 70 attached to the housing 10, and in the attached state, as shown in FIG. The suction air passage 141a of the connection pipe portion 141 communicates with the dust collection chamber 20, and the opening 1 of the large-diameter cylindrical portion 144
43a is air-tightly connected to a delivery port 75 in which the flange portion 72 of the suction port member 70 is formed.

The annular passage 143 and the passage 14
2a communicates with the outlet passage 126 formed in the main body case 103 as described above. Therefore, the exhaust air from the electric blower 50 is
The air flows through the outlet passage 127 through the return passage 17, the outlet 75, the annular passage 143, and the passage 142a formed in the housing 10, and is discharged from the outlet 127.

The discharge port 65 of the fan cover 63
Through hole 41a, communication hole 16a, return path 17, outlet 7
5, the annular passage 143, the passage 142a, and the outlet air path 126 constitute a return path for returning the exhaust air to the outlet 127.

When the cleaning is performed by the cleaner 1, the suction port 100 is connected to the cleaner 1, the power switch S is closed, and the handle 19 is held.
0, that is, the suction opening 11 on the lower surface of the lower case 110.
The cleaning is performed by moving 5 in the front-rear direction while sliding on the surface to be cleaned.

Then, by the suction action of the drive of the electric blower 50, external air is sucked from the suction opening 115 of the suction port body 100 as a suction airflow as shown by an arrow in FIG.
Dust on the floor is sucked together with the suction airflow, the dust is captured by the dust collection bag 30, and the suction airflow is reduced by the electric blower 5.
The fan 60 is sucked into the fan unit 60 as a suction airflow, and a part of the suction
Is discharged into the recirculation passage 17 through the communication hole 16a formed in the outlet port 75, the outlet 75, the annular passage 143, and the passage 142.
a, the dust is blown onto the floor from the outlet 127 via the outlet air passage 126, and the dust on the floor is blown up. 20, that is, the dust is sucked into the dust collecting bag 30, the dust is captured by the dust collecting bag 30, and the suctioned airflow from which the dust is removed is supplied to the fan unit 60 of the electric motor blower 50.
The air is then sucked into the floor as a suction airflow, and then blown onto the floor from the outlet 127 again through the recirculation path 17 and the like.
Another part of the suction airflow is exhausted from the outlet 57 formed in the main frame 52 a into the blower chamber 40 as exhaust air, and passes through the outlet 15 b formed in the partition wall 15 and the reel chamber 80. It is discharged to the outside from the exhaust port 10d.

Since the same amount of air as the amount of air exhausted to the outside as this exhaust air is sucked in from the suction opening 115 of the suction port body 100 as a new suction airflow, the temperature of the circulating exhaust air rises. The electric motor 51 to be suppressed is cooled, that is, the temperature rise is suppressed.

As described above, the vacuum cleaner 1 includes the electric blower 5
The dust sucked together with the suction airflow from the suction opening 115 by the suction action of the suction unit 115 is removed by the dust collecting bag 30, and the suction airflow from which the dust is removed and suctioned by the fan unit 60 is used as exhaust air, and a part of the suction airflow is used as a fan. By directly diverting from the discharge port 65 provided in the cover 63 and discharging it to the return path 17 and returning it to the outlet 127 of the suction port body 100 again, cleaning is performed. Dust entering the feet or the eyes of the tatami mats can be effectively cleaned because it is forcibly blown out.

Since the inside of the fan section 60 and the return path 17 are communicated with each other by the discharge port 65 provided in the fan cover 63 without passing through the inside of the motor 51 having a large flow path resistance, The flow path resistance of the return path can be reduced. That is, the fan unit 60
The suction airflow sucked from the motor 5
1 is discharged directly from the discharge port 65 provided on the outer periphery of the fan cover 63 to the recirculation path 17 without passing through the inside of the fan cover 63, so that the gas is exhausted through the recirculation path having a small flow path resistance. The pressure of the protruding exhaust air is not attenuated, and the outlet 127 of the inlet body 100 is not attenuated.
It is possible to increase the flow rate and the flow velocity of the blown air blown from the air. Further, since the recirculated exhaust air does not pass through the inside of the electric motor 51 and does not include carbon powder, it is possible to prevent the floor surface from being stained due to the carbon powder.

The exhaust air to be recirculated is diverted in the fan section 60 and is directly discharged to the recirculation path 17 without being exhausted into the blower chamber 40, that is, the fan section 60.
Since the suction airflow sucked into the air is divided by the fan unit 60, it is necessary to suppress the flow rate of the exhaust air to be exhausted by increasing the flow path resistance of the exhaust path in order to secure the flow rate and the flow velocity of the exhaust air to be recirculated. Since there is no air flow, the amount of exhaust air to be exhausted can be ensured, so that a new amount of air sucked from the suction opening 115 can be ensured, and the temperature rise of the circulating exhaust air can be suppressed, so that the electric motor 51 can be reliably cooled. You can do it.

In the above embodiment, the discharge port 65 is provided on the outer periphery of the fan cover 63.
This may be provided in another portion depending on the shape of the fan cover 63 and the like.

In the above embodiment, the discharge port 65 is provided in the fan cover 63, that is, the fan section 60. However, this is not the fan section 60 but the fan section 60.
A discharge port is formed at the boundary between the motor and the motor 51, that is, on the downstream side of the fixed fan 62 and at the outer peripheral portion near the opening of the main frame 52a, and this discharge port passes through the inside of the motor 51, that is, the inside of the main frame 52a. Instead, it may be configured to directly communicate with the return path 17. With such a configuration, since the suction airflow passes through the fixed fan 62, the flow path resistance slightly increases, but there is an advantage that the suction performance is not impaired.

In the above-described embodiment, the case where the present invention is applied to a hand-held circulating vacuum cleaner in which the suction port body 100 is directly connected to the cleaner body is used, but this is a so-called canister. It can also be applied to a type of circulation vacuum cleaner.

That is, as shown in FIG.
01, a dust collecting chamber 220 in which a dust collecting bag 230 as a dust collecting device is provided, a blower chamber 240 is provided downstream of the dust collecting chamber 220, and an electric motor is provided in the blower chamber 240. A blower 250 is provided, and a reel room 280 for providing a code reel 285 is provided downstream of the blower room 240.

The front wall of the housing 210 has an inlet 2
71a, and an outlet 275 is formed adjacent to the lower side of the inlet 271a. Further, a recirculation path 217 having a downstream side connected to the outlet 275 is formed below the housing 210.

The fan unit 2 of the electric blower 250
A discharge port 265 is provided on the lower outer peripheral wall of the fan cover 263 of the first embodiment.
Is formed, and this discharge port 265 is communicated through a through hole 241 a formed in the buffer 241. Also, the housing 210
An exhaust port 211 is formed on the rear wall.

The suction port 271a and the delivery port 275 are connected to one end of a flexible suction hose 290 having a suction flow path 291 and an exhaust flow path 292, and an extension pipe 293 to the other end. Through the suction body 294
Connect. Although not shown, a suction channel and an exhaust channel communicating with the suction channel 291 and the exhaust channel 292 are formed inside the extension pipe 293.

Further, the suction port body 294 is connected to a suction opening (not shown) communicating with the suction port 271a through the suction channel 291 of the suction hose 290 and the exhaust channel 292 of the suction hose 290 as in the above-described embodiment. The air outlet 275 has an outlet channel and an outlet (not shown) communicating with the outlet 275.

With this configuration, similarly to the above-described embodiment, the dust in the suction airflow sucked together with the dust from the suction opening of the suction port body 294 is removed by the dust collection bag 230, and the dust is removed. A part of the suction airflow sucked into the section 260 is directly discharged from the discharge port 265 to the return path 217.
The outlet 257 formed in the main frame 252a of the electric motor 251 of the electric blower 250 while discharging the air to the outlet through the exhaust passage 292 of the suction hose 290 to return the air to the outlet. Reel room 28
In this case, the air is exhausted from the exhaust port 211 to the outside through the “0”.

With this configuration, even in the case of a canister-type circulation type vacuum cleaner, the same operation and effect as in the case of the above-mentioned handy type can be obtained, and in the case of a canister type vacuum cleaner, The use of the suction hose 290 and the extension pipe 293 increases the flow path resistance of the recirculation path. However, since the recirculated exhaust air is discharged directly from the fan unit 260 via the recirculation path 217, the pressure Since the attenuation can be reduced, a sufficient air volume and flow velocity can be secured from the outlet of the suction port body 294.

As is apparent from this, the present invention is particularly effective for a vacuum cleaner having a configuration in which the flow path resistance of the return path is increased, such as the suction hose as described above.

[0076]

As described above, according to the first aspect of the present invention, a suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, and a dust collecting chamber which communicates with the suction port. , A blower room provided on the downstream side of the dust collection chamber,
A fan that is disposed in the blower chamber of the cleaner body having a return path communicating with the outlet and an exhaust port that exhausts exhaust air discharged from the blower chamber to the outside, and is rotated by an electric motor; The fan unit of the electric blower having a fan unit having a fan cover that is provided with a discharge port for diverting the suction airflow and discharging the suction airflow to the recirculation path, and a discharge port for discharging the suction airflow to the blower chamber. Since it is provided in the motor, the inside of the fan unit and the return path communicate with each other without passing through the inside of the motor having a large flow path resistance, so that the flow path resistance of the return path can be reduced, and the motor is connected to the commutator motor. In this case, it is possible to blow out the blown air from the blowout outlet with a sufficient flow rate and flow rate that does not contain carbon powder. Since the air is diverted by the fan section, it is not necessary to increase the flow path resistance of the exhaust path to suppress the flow rate of the exhaust air to be exhausted. Since the temperature rise of the exhaust air can be suppressed, the cooling of the electric motor can be surely performed.

According to a second aspect of the present invention, in the first aspect of the invention, the discharge port in the first aspect of the invention is formed in a fan cover facing the outer periphery of the fan. In addition to the effects of the invention described above, since the suction airflow can be further smoothly discharged to the recirculation path as exhaust air, there is an effect that the blowout air having a sufficient air volume and flow velocity can be blown out from the outlet. Things.

Further, the invention according to claim 3 provides a suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, a dust collection chamber which communicates with the suction port, and a dust collection chamber. A blower chamber provided on the downstream side of the chamber, a return path communicating with the outlet, and disposed in the blower chamber of the cleaner body having an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside, In the electric blower having a fan unit including a fan rotated by an electric motor and a fan cover for accommodating the fan, a suction air stream which is diverted and discharged to the return path is provided near a boundary between the electric motor and the fan unit. Since the motor is provided with an outlet and a discharge port for discharging the suction airflow into the blower chamber, the inside of the fan unit and the return path do not pass through the inside of the motor having a large flow path resistance. Due to the communication, the flow path resistance of the return path can be reduced, and even when the motor is a commutator motor, the blowout air having a sufficient flow rate and flow rate without carbon powder can be blown from the blowout port, In addition, since the suction airflow sucked by the fan portion is diverted by the fan portion, it is not necessary to increase the flow path resistance of the exhaust path to suppress the flow rate of the exhaust air to be exhausted. Since the amount of new air can be increased and the temperature rise of the circulating exhaust air can be suppressed, the electric motor can be reliably cooled.
Further, since the discharge port is provided in the vicinity of the boundary between the electric motor and the fan section, it has the effect of preventing a decrease in suction performance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part when the present invention is applied to a hand-held circulating vacuum cleaner.

FIG. 2 is a plan view in which a part of a suction port body of the vacuum cleaner is sectioned.

FIG. 3 is a sectional view showing a configuration of an electric motor of the vacuum cleaner.

FIG. 4 is a cross-sectional view of a main part when the present invention is applied to a canister-type circulation-type vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner (vacuum cleaner main body) 10 Suction port body 10d Exhaust port 17 Reflux path 20 Dust collection chamber 30 Dust collection bag (dust collection device) 40 Blower room 50 Electric blower 51 Motor 57 Outlet 61 Centrifugal fan (Fan) 63 Fan Cover 65 Discharge port 71a Suction port 75 Delivery port 100 Suction port body 101 Suction port body 115 Suction opening 127 Blow port

Claims (3)

[Claims] 1. A suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in a suction port body, a dust collecting chamber communicating with the suction port, and a dust collecting chamber provided downstream of the dust collecting chamber. A cleaner body having a blower chamber, a return path communicating with the outlet, an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside, a dust collecting device disposed in the dust collecting chamber, and an electric motor A fan unit including a fan rotated by the fan unit and a fan cover accommodating the fan, the fan unit is disposed in the blower chamber, and a suction airflow provided in the fan unit is divided and discharged to the return path. An electric vacuum cleaner comprising: a discharge port; and an electric blower provided in the electric motor and having a discharge port for discharging suction airflow to the blower chamber. 2. The discharge port according to claim 1,
An electric vacuum cleaner formed on a fan cover facing an outer periphery of a fan. 3. A suction port and a discharge port which are respectively connected to a suction opening and a discharge port provided in the suction port body, a dust collecting chamber which communicates with the suction port, and a dust collecting chamber provided downstream of the dust collecting chamber. A cleaner body having a blower chamber, a return path communicating with the outlet, an exhaust port for exhausting exhaust air discharged from the blower chamber to the outside, a dust collecting device disposed in the dust collecting chamber, and an electric motor A fan unit comprising a fan rotated by the fan and a fan cover for accommodating the fan, the fan unit is disposed in the blower room, and the suction airflow provided near the boundary between the electric motor and the fan unit is diverted. An electric blower having a discharge port for discharging to the return path and a discharge port provided in the electric motor for discharging suction airflow to the blower chamber.