JP2013027447A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust gas circulation type vacuum cleaner that prevents dust on a surface to be cleaned from blowing out without deteriorating cleaning performance.SOLUTION: The vacuum cleaner includes: an exhaust nozzle 34a blowing reflux from an exhaust air path 13 to a direction of an opening 30 from the inside a nozzle body 6; a suction port 35 for sucking the dust delivered by an air flow from the exhaust nozzle 34a to a suction air path 14; and a shielding unit 32 disposed between the surface 29 to be cleaned and an inner wall surface 36 of the nozzle body in front of the opening 30 of the nozzle body 6, for shielding an air flow with the opening 30 and the outside the nozzle body 6. The light dust on the surface 29 to be cleaned can be sucked without blowing out by rotationally driving the shielding unit 32 so as to contact with the surface 29 to be cleaned.

Description

  The present invention relates to an exhaust circulation type vacuum cleaner that recirculates exhaust discharged from an electric blower to a nozzle body.

Conventionally known exhaust circulation type electric vacuum cleaners have been highly evaluated as clean vacuum cleaners because they do not emit fine dust and odors that could not be captured by the dust collection filter. However, because of the exhaust circulation, there is a problem that exhaust gas recirculated to the nozzle body leaks from the gap between the nozzle body and the floor surface, and blows off dust and the like on the floor surface.
If this gap is closed with a sealing material, there will be no leakage of exhaust gas. However, if there is no gap in front of the nozzle body, dust on the floor surface will not enter the nozzle bottom surface, causing a problem that suction cannot be performed.

  As a method for solving this problem, there is an exhaust circulation type vacuum cleaner in which a gap is provided in front of the nozzle body, a roller is disposed in the gap, and the roller passes over the dust on the floor surface and guides the dust to the bottom surface of the nozzle body. It has been proposed (see, for example, Patent Document 1 below).

FIG. 9 shows a schematic view of a nozzle body in a conventional exhaust circulation type vacuum cleaner described in Patent Document 1. As shown in FIG.
FIG. 9 shows a nozzle body 100 that is assumed to be provided in an exhaust circulation type vacuum cleaner that performs cleaning while recirculating air discharged from the electric blower by the operation of the electric blower in the vacuum cleaner body. Show.
The nozzle body 100 sucks dust on the surface to be cleaned through an air inlet 102 that opens to face the surface to be cleaned 101, extends in a direction perpendicular to the direction of movement of the nozzle body 100, and A seal roller 103 that is rotatable in contact with the surface 101 is disposed on the front side of the air inlet 102 and is attached over substantially the entire width.

  When the nozzle body 100 is used, air discharged from the electric blower in the main body of the cleaner is returned to the intake port 102, and air is sucked from the intake port 102 toward the electric blower to circulate the air. . Therefore, the dust on the surface to be cleaned 101 can be sucked into the nozzle body 100 through the air inlet 102 facing the surface to be cleaned 101 along with the air circulation. The arrows in FIG. 9 indicate the flow of circulating air inside the nozzle body 100.

  During the cleaning, the nozzle body 100 is moved along the surface to be cleaned 101 while being pushed and pulled. In this case, since the seal roller 103 is in contact with the surface to be cleaned 101 and rotates in accordance with the moving direction of the nozzle body 100, it is possible to easily get over the dust without pushing and moving small dust on the surface to be cleaned 101. Therefore, the seal roller 103 does not get in the way of sucking the dust from the air inlet 102.

  As described above, the seal roller 103 that contacts the surface to be cleaned 101 acts as a windbreak wall at least on the front side in the movement direction of the nozzle body 100 in the gap between the surface to be cleaned 101 and the bottom wall 104 of the nozzle body 100. . Thereby, the seal roller 103 prevents a part of the circulating air that has passed through the air inlet 102 from leaking to the front side in the movement direction of the nozzle body 100 through the gap, so that dust on the front side in the movement direction of the nozzle body 100 can be prevented. Can be prevented from being blown away.

JP-A-11-216084

However, even the conventional vacuum cleaner described in Patent Document 1 still has room for improvement from the viewpoint of preventing dust from being blown off on the floor.
That is, in the electric vacuum cleaner described in Patent Document 1, the seal roller 103 eliminates the leakage of circulating air between the seal roller 103 and the surface to be cleaned 101, but the gap between the nozzle body surface 105 and the seal roller 103 is eliminated. There is a gap, and a part of the circulating air passing through the intake port 102 leaks from this gap. Accordingly, light dust such as cotton dust and pet hair on the surface to be cleaned 101 is blown and moved, and when the nozzle body 100 is brought close to dust, the dust escapes and cannot be sucked into the nozzle body 100.

  If contact is made to eliminate the gap between the nozzle body surface 105 and the seal roller 103, the seal roller 103 cannot rotate due to friction between the seal roller 103 and the nozzle body surface 105. Therefore, it is necessary to secure a certain amount of gap, and thus leakage of circulating air cannot be prevented.

  Further, the exhaust circulation type nozzle body 100 is not sucked unless dust on the surface to be cleaned 101 reaches the lower part of the air inlet 102 through which the circulating air flows. Therefore, even if dust on the surface to be cleaned 101 enters the bottom of the nozzle body 100 via the seal roller 103, it will not be sucked unless it comes directly under the air inlet 102. Therefore, dust between the seal roller 103 and the air inlet 102 remains as it is. When the nozzle body 100 moves backward, there is a problem that the nozzle body 100 is discharged out of the nozzle body 100 again.

  Further, since the seal roller 103 rolls so as to press the dust against the surface to be cleaned 101 when it passes over the dust, granular dust such as sand particles is contained in the fiber on the surface to be cleaned 101 such as carpet. There were also problems such as garbage being pushed in and making it difficult to remove.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide an exhaust circulation type electric vacuum cleaner that prevents the dust on the surface to be cleaned from blowing without deteriorating the cleaning performance. To do.

In order to solve the problems of the above-mentioned conventional technology
A vacuum cleaner main body with a built-in electric blower and a dust collection chamber provided on the negative pressure side of the electric blower,
A nozzle body for sucking dust on the surface to be cleaned;
A suction air passage communicating the nozzle body with the negative pressure side of the electric blower through the dust collection chamber;
An exhaust air passage communicating the positive pressure side of the electric blower with the nozzle body,
The nozzle body is
An opening that opens opposite the surface to be cleaned;
A spout that blows out the reflux from the exhaust air passage from the inside of the nozzle body toward the opening,
A suction port for sucking the dust conveyed by the airflow from the jet port into the suction air passage;
Shielding means that is disposed in front of the opening and between the surface to be cleaned and the wall surface of the nozzle body, and shields the air flow between the opening and the outside of the nozzle body,
There is provided a vacuum cleaner comprising: a driving unit that rotationally drives a part of an outer periphery of the shielding unit so as to contact the surface to be cleaned.

Thereby, since the vacuum cleaner of this invention eliminates the leakage of circulating air by a shielding means, it does not blow off the dust of a to-be-cleaned surface. Further, since the shielding means is forcibly rotated, the dust on the surface to be cleaned can be easily drawn into the lower part of the nozzle body, and the dust that is drawn in by the rotating action of the shielding means can be blown off directly below the opening. As a result, dust can be effectively sucked from the opening.

  Further, the shielding means has an action of scraping dust on a fibrous surface to be cleaned such as a carpet when rotating, so that a higher cleaning performance can be obtained.

  Moreover, from the viewpoint of obtaining the above-described effect of the present invention more reliably, in the electric vacuum cleaner of the present invention, the shielding means rotates while the outer peripheral portion is in contact with each of the surface to be cleaned and the wall surface of the nozzle body. (Claim 2).

  Thereby, the vacuum cleaner of the present invention can reliably prevent leakage of circulating air to the outside of the nozzle body by rotating the shielding means in contact with the surface to be cleaned and the surface of the nozzle body. As a result, the dust on the surface to be cleaned can be prevented from being blown out or moved.

  In addition, from the viewpoint of more surely obtaining the above-described effect of the present invention, in the electric vacuum cleaner of the present invention, it is preferable that the driving means rotationally drive the shielding means in the forward direction of the nozzle body. 3).

  Thereby, when the nozzle body is moved forward by rotating the shielding means in the forward direction of the nozzle body, an action of drawing dust in front of the nozzle body into the lower part of the nozzle body is produced. Further, when the nozzle body is moved backward, the dust reaching the opening from the rear part of the nozzle body acts to repel the dust remaining without being sucked from the opening by the rotating action of the shielding means. Therefore, the shielding means can improve the dust suction performance while preventing the circulating air from leaking outside.

  In addition, from the viewpoint of obtaining the above-described effect of the present invention more reliably, in the vacuum cleaner of the present invention, the peripheral speed due to the rotation of the outer peripheral portion of the shielding means can be made faster than the forward speed of the nozzle body. Preferred (claim 4).

  Thereby, by making the outer peripheral speed of rotation of the shielding means faster than the forward speed of the nozzle body, the outer periphery of the shielding means acts to scratch the surface to be cleaned backward. Therefore, when the dust in front of the nozzle body is drawn into the lower part of the nozzle body, there is an effect that the dust is blown away behind the nozzle body. As a result, dust can be blown off directly below the opening, so that the dust is easily sucked from the opening.

  Further, from the viewpoint of obtaining the above-described effect of the present invention more reliably, in the electric vacuum cleaner of the present invention, the shielding means has a substantially cylindrical shape by radially arranging a plurality of flexible blades. It is preferable that at least one of the blades contacts and rotates with the cleaning surface.

  With this configuration, the surface to be cleaned is brought into contact with the surface to be cleaned with a flexible blade, so that the surface to be cleaned can be reliably shielded. Moreover, since it can rotate so that dust may be pinched | interposed between each braid | blade, it becomes possible to scrape into the bottom part of a nozzle body easily also with big dust.

  Further, in addition to the effects of the present invention described above, from the viewpoint of improving the rotation of the shielding means, in the vacuum cleaner of the present invention, the radially arranged blades have a thick central portion and an outer peripheral portion. However, it is preferable that the thickness is thin.

By adopting this configuration, the rigidity at the base of the blade is increased, so that the rigidity of the blade can be secured and the dust scraping performance can be kept good. Further, since the thickness of the tip of the blade is reduced, the contact pressure with the surface to be cleaned and the contact pressure with the wall surface of the nozzle body are lowered, and the rotational torque of the driving means can be reduced by reducing friction.

  Further, from the viewpoint of ensuring the effect of the present invention described above, in the electric vacuum cleaner of the present invention, the shielding means forms a ribbon-like bristle brush by arranging bristle materials closely in parallel. It is preferable that the bristle brushes are arranged in a radial shape so as to have a substantially cylindrical shape so that at least one of the bristle brushes contacts and rotates with respect to the surface to be cleaned.

  With this configuration, each bristle brush's bristles flexibly contact with the irregularities of the surface to be cleaned at the contact portion between the bristle brush and the surface to be cleaned, so that sharp irregularities such as steps and grooves are formed. Also, it is possible to prevent the circulating air from leaking with almost no gap.

  According to the present invention, it is possible to provide an exhaust circulation type electric vacuum cleaner that prevents the dust on the surface to be cleaned from being blown out without deteriorating the cleaning performance.

The schematic diagram which shows the cross section of the plane of the whole electric vacuum cleaner in Embodiment 1 of this invention Schematic showing the cross-sectional configuration of the side of the vacuum cleaner body Plan view from the bottom of the nozzle body of the vacuum cleaner Sectional view from the side of the nozzle body of the vacuum cleaner Partial sectional view from the side of the nozzle body of the vacuum cleaner The schematic diagram which shows the drive means from the bottom direction of the nozzle body of the vacuum cleaner Partial sectional drawing from the side which shows the shielding means of the vacuum cleaner in Embodiment 2 of this invention Partial sectional drawing from the side which shows the shielding means of the vacuum cleaner in Embodiment 3 of this invention The schematic diagram which shows the cross-sectional structure of the side surface of the nozzle body of the conventional vacuum cleaner

  Hereinafter, a preferred embodiment of a vacuum cleaner of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a cross section of the entire vacuum cleaner according to Embodiment 1 of the present invention, FIG. 2 is a schematic diagram showing a cross-sectional configuration of a side surface of the vacuum cleaner body, and FIG. 3 is a nozzle of the vacuum cleaner. 4 is a plan view from the bottom of the body, FIG. 4 is a cross-sectional view from the side of the nozzle body of the vacuum cleaner, FIG. 5 is a side view of a partial cross-section of the nozzle body of the same vacuum cleaner, and FIG. It is a schematic diagram which shows the drive means from the bottom direction of the nozzle body of a machine.

  As shown in FIGS. 1 and 2, wheels 2 and casters 3 are attached to the outside of the cleaner body 1, and the cleaner body 1 can freely move on the floor surface. A hose 4 and an extension pipe 5 are sequentially connected in front of the cleaner body 1, and a nozzle body 6 is attached to the tip of the extension pipe 5.

The vacuum cleaner main body 1 includes an electric blower chamber 10 having a built-in electric blower 9 having an intake port 7 for sucking air forward and an exhaust port 8 for discharging exhaust gas, and a power supply chamber 11 having a cord reel or a storage battery. The dust collecting chamber 12 provided in the suction port 7 on the negative pressure side of the electric blower 9 communicates with the dust collecting chamber 12 and the nozzle body 6, and dust sucked from the nozzle body 6 is passed to the dust collecting chamber 12. It has a suction air passage 14 that leads and an exhaust air passage 13 that guides the exhaust discharged from the exhaust port 8 on the positive pressure side of the electric blower 9 to the nozzle body 6.
Therefore, the hose 4, the extension pipe 5, and the nozzle body 6 each have a suction air passage 14 and an exhaust air passage 13 that communicate with each other.

  In the vicinity of the exhaust port 8 of the exhaust air passage 13, a first air passage 17 in which a plurality of tubular heat transfer bodies 15 that allow exhaust to pass inside are arranged in parallel, and a case body that covers the periphery of the heat transfer body 15 18 and a second air passage 19 formed by gaps between the plurality of tubular heat transfer bodies 15, and the outside air is introduced into the second air passage 19 by the cold air fan 20, and the outer surface of the heat transfer body 15 is introduced. A heat exchanging means 21 that dissipates exhaust heat by touching outside air is arranged.

  1 and 2, solid arrows indicate the flow of air circulated by the electric blower 9, and broken arrows indicate the flow of outside air taken in by the cold air fan 20 and discharged through the second air passage 19. The outside air flowing around the heat transfer body 15 is in the opposite direction to the exhaust flow direction in the first air passage 17. That is, the outside air flows from the downstream side to the upstream side of the exhaust. By using a so-called counterflow, heat can be efficiently radiated from the entire heat transfer body 15.

In addition, the baffle plate 24 disposed in the second air passage 19 can cause the outside air to meander in the second air passage 19 to prevent the uneven flow of the outside air and improve the heat radiation efficiency.
A dust collection bag 25 is replaceably disposed in the dust collection chamber 12, and dust sucked by the nozzle body 6 is trapped by the dust collection bag 25.

In the partition wall 26 where the exhaust air passage 13 and the suction air passage 14 are adjacent to each other in front of the cleaner body 1, there are a bypass air passage 27 that communicates both air passages, and an opening / closing means 28 that opens and closes the bypass air passage 27. Is provided. The opening / closing means 28 is controlled to be opened / closed by bypass control described later.
The nozzle body 6 is provided with a cylindrical rotary brush 31 at the center and a shielding means 32 in front of the rotary brush 31 in parallel. Details of the nozzle body 6 will be described later.

Next, the structure of the nozzle body 6 is demonstrated using FIGS.
3 and 4, the bottom surface of the nozzle body 6 has an opening 30 for sucking dust on the surface 29 to be cleaned, a rotating brush 31 desired for the opening 30, and a shielding means in front of the nozzle (right side in the figure). 32 is provided. The shielding means 32 has a plurality of rubber blades 33 mounted radially like a revolving door rotating forward, while the nozzle body 6 from the outlets 34a, 34b, 34c from the exhaust air passage 13 during the cleaning operation. The circulating air ejected inside is sealed so as not to leak from the front of the nozzle body 6, and dust on the surface to be cleaned is taken into the nozzle body 6 from the opening 30.

  Circulating air jetted into the nozzle body 6 from the jet outlets 34a, 34b, 34c passes through the opening 30 as shown by the arrow in FIG. 4 and carries dust to the suction air passage 14 through the suction inlet 35. Led. The white block arrows in FIG. 3 indicate the flow of the nozzle body 6 from the outlet 34a and the outlet 34c to the rear of the nozzle body 6 and the direction of the circulating air flowing from both sides of the nozzle body 6 to the center from the outlet 34b. Yes. The dust sucked from the opening 30 by the flow of the circulating air is collected in the suction air passage 14 and sucked.

  The shielding means 32 rotates the nozzle body 6 in the forward direction while the lower end of the blade 33 is in contact with the surface 29 to be cleaned and the upper end of the blade 33 is in contact with the nozzle body wall surface 36 of the nozzle body 6. Dust can be drawn into the lower part of the nozzle body 6 while blocking.

A raised cloth 37 is arranged around the opening 30 on the bottom surface of the nozzle body 6 so that the circulating air does not leak to both sides of the nozzle body 6 and to the rear. The raised cloth 37 prevents the circulating air from leaking out of the nozzle body 6 even if the nozzle body 6 moves up and down due to some unevenness on the surface to be cleaned.

  Behind the opening 30 on the bottom surface of the nozzle body 6 is provided a floor surface detection means 38 for detecting that the nozzle body 6 is separated from the surface to be cleaned 29 by being lifted or the like. FIG. 5 shows the configuration of the floor detecting means 38. As shown in the figure, the floor surface detection means 38 includes a wheel 40 that rotates about a hinge 39, and a micro switch 41 that operates when the wheel 40 is lowered by a predetermined amount or more. By the operation of the micro switch 41, it is detected that the nozzle body 6 is separated from the floor surface. The wheel 40 is urged downward by a spring 42, and the micro switch 41 is always maintained while the nozzle body 6 is away from the floor surface. When the nozzle body 6 is in contact with the floor surface, the wheel 40 is raised and the microswitch 41 is inoperative. This non-operation state is a floor surface detection state.

  Next, bypass control will be described. In the bypass control, the opening / closing means 28 (FIG. 1) for opening and closing the bypass air passage 27 (FIG. 1) is operated according to the operating state of the microswitch 41. The specific operation of the control is to close the bypass air passage 27 by turning the opening / closing means 28 when the floor surface detection means 38 detects that the nozzle body 6 and the surface 29 to be cleaned are in contact. When the floor surface detection means 38 detects that the nozzle body 6 and the surface 29 to be cleaned are separated, the opening / closing means 28 is opened so that the bypass air passage 27 is fully opened.

  Therefore, when the nozzle body 6 is lifted from the surface to be cleaned 29, the opening / closing means 28 opens the bypass air passage 27, so that the exhaust from the electric blower 9 flows from the exhaust air passage 13 through the bypass air passage 27 to the suction air passage 14 and is collected. It returns to the electric blower 9 through the dust chamber. Therefore, since the flow of the exhaust gas to the nozzle body 6 is eliminated, the dust on the floor surface is not blown away.

Next, the drive means 43 that rotates the rotating brush 31 and the shielding means 32 will be described with reference to FIG.
The drive unit 43 includes an electric motor 44, a first transmission unit 45 that transmits the rotation of the electric motor 44 to the rotary brush 31, and a second transmission unit 46 that transmits the rotation of the rotary brush 31 to the shielding unit 32. The first transmission means 45 includes a pulley and a belt that transmit the rotation of the electric motor 44 to the intermediate shaft 47 and transmit the rotation of the intermediate shaft 47 to one end of the rotary brush 31. On the other hand, the second transmission means 46 is configured by connecting a pulley provided at the other end of the rotating brush 31 and a pulley provided at one end of the shielding means 32 with a belt.

  When the electric motor 44 is rotated, the rotating brush 31 is rotated via the first transmission means 45, and the shielding means 32 is rotated in conjunction with this rotation. The rotating brush 31 and the shielding means 32 rotate in the same direction, and the direction is set to the direction in which the nozzle body 6 moves forward in order to match the direction in which dust is sucked. Further, it is desirable to set the rotation speed of the shielding means 32 to be smaller than that of the rotary brush 31 so that the blade of the shielding means 32 does not blow away dust due to the wind caused by the rotation.

  Furthermore, it is desirable that the peripheral speed by the rotation of the blade of the shielding means 32 is faster than the forward speed of the nozzle body 6. This is because by making the peripheral speed faster than the forward speed of the nozzle body 6, the blade of the shielding means 32 can scratch the surface to be cleaned toward the rear of the nozzle body 6, and the action of blowing dust in the direction of the opening 30 occurs. Therefore, dust suction loss can be reduced.

With the above configuration, when the electric blower 9 is operated as shown in FIG. 1, the dust collection chamber 12 and the suction air passage 14 become negative pressure, and a suction flow is generated from the nozzle body 6 toward the electric blower 9. Then, the dust is sucked from the floor surface, which is the surface to be cleaned, with which the nozzle body 6 is in contact with this flow, and is trapped in the dust bag 25. On the other hand, the exhaust from the electric blower 9 is blown out from the exhaust port 8 of the electric blower chamber 10 through the exhaust air passage 13 to the surface to be cleaned inside the nozzle body 6. Since the dust flow on the floor surface is guided to the suction air passage 14 by the jet flow of the exhaust gas, the dust can be sucked without taking in the outside air.
At this time, the shielding means 32 shown in FIG. 4 rotates while shielding the gap between the nozzle body 6 and the surface 29 to be cleaned, so that the dust on the surface 29 to be cleaned is drawn directly under the opening 30 without blowing off the dust. Can do.

  As mentioned above, although Embodiment 1 in the vacuum cleaner of this invention was demonstrated, the vacuum cleaner of this invention is not limited to the canister type vacuum cleaner mentioned above. For example, an upright type vacuum cleaner may be used.

  Moreover, although the dust collection chamber of Embodiment 1 in the vacuum cleaner of this invention was set as the structure which collects dust with a dust bag, it can also be used as a cyclone type dust collection chamber which collects dust by centrifugation. Good.

  In the first embodiment, the blade is made of rubber. However, the blade is not limited to this, and may be an elastomer, a soft resin, a non-woven fabric, or a composite material thereof.

(Embodiment 2)
Next, the vacuum cleaner which concerns on Embodiment 2 of this invention is demonstrated in detail using drawing. FIG. 7 is a cross-sectional view from the side showing the shielding means 50 in the second embodiment. In addition, the same part as Embodiment 1 mentioned above attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 7, the difference from the first embodiment is that the thickness of the rubber blades 52 arranged radially with respect to the core material 51 is thicker at the center and thinner at the outer periphery. It is in. With this configuration, the thickness of the base of the blade 52 becomes thick, so that the rigidity necessary for scraping off dust on the surface 29 to be cleaned can be secured, and the dust scavenging performance is kept good. Can do.

  Further, since the thickness of the tip of the blade 52 is reduced, the contact pressure with the surface 29 to be cleaned and the contact pressure with the nozzle body wall surface 36 of the nozzle body 6 are reduced, and the friction of the tip of the blade 52 when the shielding means 50 rotates. By reducing the resistance, the rotational torque of the drive means can be reduced. In addition, the life of the blade 52 is extended because wear on the blade 52 is reduced. Further, since the tip end portion of the blade 52 is thin, the blade 52 is deformed flexibly with respect to the unevenness of the surface 29 to be cleaned, so that the shielding performance is further increased.

  Note that the material of the blade in the second embodiment is not limited to rubber, and may be an elastomer or a soft resin, or a composite material thereof.

(Embodiment 3)
Next, the vacuum cleaner which concerns on Embodiment 3 of this invention is demonstrated in detail using drawing. FIG. 8 is a cross-sectional view from the side showing the shielding means 60 in the third embodiment. In addition, the same part as Embodiment 1 mentioned above attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 8, the difference from the first embodiment is that the bristle materials 61 are arranged closely in parallel to form a ribbon-like bristle brush 62, and eight bristle brushes 62 are prepared. 63 is arranged in a radial shape in a substantially cylindrical shape.

With this configuration, each bristle brush's bristles flexibly contact with the irregularities of the surface to be cleaned 29 at the contact portion between the bristle brush 62 and the surface to be cleaned 29. Therefore, it is possible to more reliably prevent the leakage of circulating air.

  Further, since the cleaning material 29 has a scraping action of carpet dust like the rotating brush by the bristle material 61, the shielding means 60 can also be used as the rotating brush, so that the configuration is simple and low cost. The nozzle body is realized.

  The vacuum cleaner of the present invention can be used not only for home use but also for various exhaust circulation type vacuum cleaners for business use.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 6 Nozzle body 9 Electric blower 12 Dust collection chamber 13 Exhaust air path 14 Suction air path 29 Surface to be cleaned 30 Opening part 32 Shielding means 34a, 34b, 34c Outlet 35 Suction port 36 Nozzle body wall surface 43 Driving means 50 Shielding means 52 Blade 60 Shielding means 61 Bristle material 62 Bristle brush

Claims (7)

A vacuum cleaner main body with a built-in electric blower and a dust collection chamber provided on the negative pressure side of the electric blower,
A nozzle body for sucking dust on the surface to be cleaned;
A suction air passage communicating the nozzle body with the negative pressure side of the electric blower through the dust collection chamber;
An exhaust air passage communicating the positive pressure side of the electric blower with the nozzle body,
The nozzle body is
An opening that opens opposite the surface to be cleaned;
A spout that blows out the reflux from the exhaust air passage from the inside of the nozzle body toward the opening,
A suction port for sucking the dust conveyed by the airflow from the jet port into the suction air passage;
Shielding means that is disposed in front of the opening and between the surface to be cleaned and the wall surface of the nozzle body, and shields the air flow between the opening and the outside of the nozzle body,
An electric vacuum cleaner comprising: driving means for rotating the part of the outer periphery of the shielding means so as to contact the surface to be cleaned. 2. The vacuum cleaner according to claim 1, wherein the shielding means rotates while an outer peripheral portion contacts each of the surface to be cleaned and the wall surface of the nozzle body. The vacuum cleaner according to claim 1, wherein the driving unit rotates the shielding unit in a forward direction of the nozzle body. The vacuum cleaner according to any one of claims 1 to 3, wherein a peripheral speed due to rotation of an outer peripheral portion of the shielding means is higher than a forward speed of the nozzle body. 2. The shielding means according to claim 1, wherein a plurality of flexible blades are arranged radially to form a substantially cylindrical shape, and at least one of the blades contacts and rotates with respect to the surface to be cleaned. The electric vacuum cleaner according to any one of 4. The vacuum cleaner according to claim 5, wherein the radially arranged blades are configured to have an uneven thickness with a thick central portion and a thin outer peripheral portion. The shielding means includes a bristle material arranged closely in parallel to form a ribbon-like bristle brush, a plurality of the bristle brushes arranged radially to form a substantially cylindrical shape, and the bristle brush The vacuum cleaner according to any one of claims 1 to 4, wherein at least one of the vacuum cleaners is configured to contact and rotate.