TW201700052A - Suction nozzle for sucking coarse particles and fine dust capable of sucking dirt and/or dust from floor by means of suction air flow by smaller power and with lower noise pollution - Google Patents

Abstract

The present invention relates to a suction nozzle of vacuum cleaner for sucking dirt and/or dust from the floor by means of suction air flow, which comprises a housing; a suction chamber formed inside the housing; a suction channel for guiding the suction air flow and communicated to the suction chamber; and, a suction port formed as the bottom opening of the suction chamber; wherein, the suction port has one central suction port segment and two lateral suction port segments disposed at two sides of the central suction port segment, and the lateral suction port segments are designed such that the cross-sections of the lateral suction port segments are gradually tapered and extended away from the suction channel and toward the opposite sides of the suction nozzle, and are partially closed at the top ends respectively by the connecting members.

Description

a nozzle for absorbing coarse particles and fine dust

The present invention relates to a suction nozzle of a vacuum cleaner that absorbs dirt and/or dust from a floor by means of a suction airflow, having a housing, a suction chamber formed inside the housing, a suction passage for guiding the suction airflow and leading to the suction chamber, and A suction port is formed as a bottom side opening of the suction chamber.

In practice, suction nozzles are known, referred to as attachments, also referred to as suction nozzles or as hard floor nozzles or carpet nozzles depending on the purpose of use, and these nozzles are often used with vacuum cleaners to absorb dirt and/or from the floor. dust. A vacuum cleaner having such a suction nozzle generally has a base casing in which an electric suction engine for forming a suction airflow is disposed. The nozzle is typically fluid-tightly connected to the vacuum cleaner via a flexible suction hose and/or steering tube. In a vacuum cleaner, the nozzle is generally integrated into the base housing itself. A plurality of brush rows or the like for detaching dirt and/or dust from the floor are provided on the suction nozzle. The dust and/or dirt thus detached from the floor is carried by the suction airflow and is separated in the dust filter bag at least in the dust collection chamber provided in the base casing.

The dirt or dust to be removed from the floor is classified into coarse particles and fine dust according to various particle sizes. In the prior art, on the one hand, it is known for coarse particles. The nozzle is optimized for absorption of the granules, and on the other hand a nozzle for absorbing fine dust particularly well is also designed. For example, hard floor nozzles are generally not provided for pumping coarse particles, but there are other nozzles that can be manually switched between coarse particle absorption and fine dust absorption by means of a foot switch. The operation of the foot switch generally causes the brush row to protrude from the nozzle, by which the distance of the nozzle relative to the floor is increased, so that coarse particles can be better absorbed or sucked. However, the nozzles known in the prior art can only meet the opposite and opposite requirements (ie either for coarse particle absorption or for fine dust absorption) or must be manually operated by the user between different operating modes. Switch.

Starting from this, the object of the invention is to specify a nozzle for absorbing dirt and/or dust which is versatile for different particle sizes and in particular has the characteristic of being able to absorb fine dust particularly well. Furthermore, the nozzle can absorb both coarse particles and fine dust, without the need to manually switch the operating mode of the nozzle. Furthermore, it is expected that such nozzles are characterized by less propulsion and/or lower noise pollution.

The object of the invention is achieved by the features described in the independent claims. An advantageous design is illustrated in the dependent claims.

Accordingly, the object is achieved by a suction nozzle of a vacuum cleaner that absorbs dirt and/or dust from the floor by means of a suction air flow, the suction nozzle having a housing, a suction chamber formed inside the housing, for guiding the suction airflow and leading to a suction passage in the suction chamber and a suction port forming a bottom side opening as a suction chamber, wherein the suction port has a central suction port section and two are located The side suction section on both sides of the central suction opening section, and the side suction section is designed such that the cross section of the side suction section extends away from the suction channel toward the opposite sides of the suction nozzle and gradually narrows and It is partially closed at its top end by a connecting member.

An important aspect of the invention is the distribution of the suction opening into the central suction opening section and the two side suction opening sections, so that the area for absorbing fine dust is separated, in particular by the side suction section, and in particular by central suction. The mouth section separates the area for the coarse particles. The above-described design of the side suction section which is gradually narrowed in cross section, the side suction section being partially closed at its top end by the connecting part, respectively, achieves a higher fluid velocity in the side suction section or The high volumetric flow rate thus achieves a substantially better fine dust absorption compared to designs known in the prior art. The suction airflow which flows through the side suction section and the central suction section merges with each other in the region of the suction channel, the suction airflow having dirt or dust absorbed from the floor from which the suction air flows, for example, via the connection sleeve Guided out.

A higher low pressure produced in the side suction section due to the above-described design can be achieved in an advantageous manner under the condition that the suction nozzle has a relatively small vacuum suction area. Accordingly, the proposed nozzle has the characteristics of a small propulsive force. The nozzle achieves a particularly simple work since there is no need to manually switch between different operating modes for pumping fine dust and coarse particles. The nozzle additionally has the feature of low noise pollution in a more preferred manner. Thus, by the design of the side suction section and the distribution of the suction opening into the central suction section and the two side suction sections which preferably surround the central suction section from the side, the suction nozzle is not only fine dust but also In the suction of coarse particles A particularly high absorption power is achieved during the collection process. The above-mentioned terminology for describing the position of each part of the nozzle is based on the position and orientation of such a nozzle, such as the state it exists in the operating state when the floor is sucked, wherein the nozzle is placed on the floor. And exercise on the floor.

According to a preferred embodiment, the cross section of the side suction section is linear, stepped and/or tapered in a curved manner. It is particularly preferred to implement the side suction section in such a way that the width of the side suction section is at the suction channel 30mm and 40 mm, preferably 35 mm, is gradually narrowed to the side of the nozzle before the connecting member 20mm and 30 mm, preferably 25 mm, wherein the height of the side suction section on the suction channel and on the side of the nozzle before the connecting part is 20mm and 30 mm, preferably 22 mm. It has been experimentally confirmed that when the width of the side suction section is gradually narrowed by a 33 mm straight line at the inlet thereof into the suction passage to 27 mm at the area before the connecting member, the height of each side suction section A constant 22 mm is particularly advantageous for optimized fine dust absorption.

In order to design different connecting possibilities, it is advantageous in principle to reduce the cross section of the side suction section by the connecting part. According to a particularly preferred embodiment, the connecting part extends forwardly away from the housing in the direction of the floor, such that the connecting part forms an opening of the side suction opening section on the side of the suction nozzle, the opening having 6mm and a height of 10 mm, preferably 7.6 m, and 20mm and 30mm or A width of 30 mm, preferably 25 mm. The connecting member is preferably formed as a U-shaped window as viewed from the bottom view. Viewed in side view, the window is preferably defined at least in part by a housing and a fluid seal on the side as will be described below. It is particularly preferred that the connecting part is designed in one piece with the housing, for example from plastic injection molding, and has 2mm and A thickness of 4 mm, preferably 2.5 mm. The connecting member preferably extends away from the housing in a vertical direction.

In a further particularly preferred embodiment, the side suction opening section has a respective curvature at its top end on the side of the suction nozzle, wherein the curved portion is preferably formed in such a way that the side suction opening area is reduced by the curved portion. The width of the segment and/or the opening of the side suction port section formed on the side of the suction nozzle by the connecting member extends perpendicular to the opening in front of the central suction port section. The curved portion is preferably designed such that the curved portion causes the width of the side suction port section to be reduced by 2 mm, 5 mm or 10 mm in the direction of the side surface of the suction nozzle. Referring to the design already discussed above, when the side suction port sections are linearly narrowed by a width of 33 mm at the entrance thereof into the suction passage, respectively, to a width of 27 mm before the bending portion, and then by bending When the width continues to be narrowed to 25 mm on each side, particularly good fine dust absorption can be achieved.

According to a preferred refinement, the suction opening and/or the central suction opening section have the shape of an isosceles triangle, wherein the suction channel preferably opens into the suction chamber thus formed in the region of the tip between the lateral sides of the triangle. The central suction port section extends from the suction passage to the bottom edge of the isosceles triangle and the side suction section extends along the respective sides of the isosceles triangle from the suction passage to the angle of the isosceles triangle disposed opposite the tip. With the above design, the coarse particle region formed by the central suction port section is disposed substantially before the fine dust region formed by the side suction port section in the advancement of the suction nozzle. Here, it is preferred that the side suction section is oppositely disposed at the tip of the isosceles triangle The corners of the shape are adjacent to the central suction port section. In this way, a fine dust absorption in at least the angular region of the suction nozzle and up to the front side of the suction nozzle is achieved in an advantageous manner.

According to a further preferred embodiment, the two side suction opening sections extend away from the suction channel to the side of the suction nozzle, respectively, such that the angle α between the longitudinal extension directions of the two side suction opening sections is 45°. α 160°, preferably 90° α 135°, particularly preferably angle α 135°, or the two side suction sections extend away from each other along the curve by the suction passage. If the two side suction section extends linearly or approximately linearly between the suction channel and the side of the nozzle, for example a suction opening provided along the side of the isosceles triangle, the central suction section preferably has The shape of the isosceles triangle is such that its bottom edge is oriented in the direction of the front surface of the nozzle.

According to a particularly preferred embodiment, the side suction section is defined by the inner and outer side fluid seals which extend from the suction channel to the side of the suction nozzle, so that the central suction section passes through the inner side of the respective side suction section. The side fluid seal is defined. The inner and outer side fluid seals can be arranged essentially as a seal for the suction air flow, but wherein the side fluid seals are preferably designed as one or more rows of the brush rows, sealing lips and/or these combination.

The brush or sealing lip preferably extends perpendicularly away from the housing towards the floor and is designed to be soft so that coarse or fine dust on the floor reaches the center through the brush or sealing lip during the advancement of the nozzle in the conventional direction of advancement. In the suction section and/or in the side suction section. The two inner side fluid seals preferably define a passage for the suction airflow between the suction passage and the central suction port section, wherein the width of the opening between the two inner side fluid seals is preferably 25 mm, 30 mm, 32 mm. , 37mm, 40mm or 45mm, thereby drawing in the airflow 45% and 65% of the flow passes through the central suction section.

The lateral fluid seal is particularly preferably extended substantially linearly from the suction channel to the side of the nozzle. The lateral side fluid seal is preferably provided on one edge of the nozzle and preferably extends along the entire edge. In the region of the suction channel, the two outer side fluid seals are preferably formed in one piece and particularly preferably extend in the form of a curve to one another. The suction channel preferably has a circular or elliptical cross section which is defined at least partially in the opening region by the lateral side fluid seal. On the side of the nozzle, or in the case of the suction opening of the isosceles triangle, the side suction section is preferably open at the corners of the triangle, for example by means of a U-shaped side window through which fine dust can enter In each side suction section.

According to a preferred refinement, the suction opening has an additional central suction opening section and two further side suction opening sections on either side of the further central suction opening section, wherein the central suction opening section and the additional The central suction port section extends away from the suction passage in the opposite direction such that the two side suction section and the two additional side suction sections form an X-shaped arrangement. The nozzle thus designed can absorb coarse particles both during advancement and during retraction. The nozzles are preferably designed symmetrically, in particular mirror-symmetrical, during the advancement and in the retraction. More preferably, the suction channel represents the midpoint of the design in plan view, the central suction section and the two side suction sections and, in particular, the mirror-symmetrically opposite central suction section And two additional side suction ports extend away from the midpoint. In this design, instead of manually rotating the nozzle known in the prior art around 180°, in order to absorb coarse particles during advancement and retreat, the user can simply move the nozzle forward and backward.

1‧‧‧shell

2‧‧‧ bottom plate

3‧‧‧Inhalation room

4‧‧‧Inhalation channel

5‧‧‧Inhalation

6‧‧‧Central suction section

6a‧‧‧Bottom

7‧‧‧Side suction section

7a, α‧‧‧ corner

8‧‧‧Side fluid seals

9‧‧‧Air passage

9a‧‧‧ side

9b‧‧‧Bend

10‧‧‧ openings

10a‧‧‧Connecting parts

11‧‧‧ front side fluid seals

12‧‧‧Devices for sound barriers

The invention will be further elucidated with the aid of preferred embodiments with reference to the drawings.

Fig. 1 shows a nozzle according to a preferred embodiment of the invention in a schematic bottom view of the nozzle, and Fig. 2 shows the nozzle according to Fig. 1 in a perspective view.

Figures 1 and 2 show the nozzle, also referred to as a floor nozzle, in a schematic bottom view. The nozzle has a plastic housing 1 on which a bottom plate 2 is formed on the bottom side. A suction chamber 3 is formed below the bottom plate 2, into which the suction passage 4 opens and which serves as a suction opening 5 on the bottom side. As can be seen from Fig. 1, the bottom plate 2 and the suction port 5 have the shape of an isosceles triangle, and the bottom edge 6a of the isosceles triangle indicates the front side of the nozzle in the advancing direction.

The suction passage 4 is fluid-tightly connected to a connecting sleeve (not shown) provided on the upper side of the housing 1. A hand-operated tube and/or a flexible hose can be fluidly connected to the base housing of the cleaner on the connecting sleeve, in which an electrically driven suction engine for forming a suction flow is provided. In the dust collecting chamber provided in the base casing, dirt and/or dust carried by the suction airflow from the floor to be cleaned can be separated in the dust filter bag.

The suction port 5 has a central suction port section 6 and two side suction port sections 7 located on either side of the central suction port section 6 or laterally surrounding the central suction port section 6. The side suction section 7 extends substantially linearly from the suction channel 4 towards the angle 7a of the isosceles triangle, such that the angle α between the longitudinal extensions of the two side suction sections 7 is 135°. The side suction section 7 is fluidically defined by the inner and outer side fluid seals 8. The outer side fluid seals 8 extend along the respective sides by respective corners 7a of the isosceles triangle and merge with each other in a semicircular shape between the two sides defining the suction passage 4.

Correspondingly, the entire back side of the nozzle is defined by the outer side fluid seal 8, which is primarily provided as a brush row. The inner side fluid seal 8 is approximately parallel to the outer side of the side fluid seal 8 and extends away from the suction channel 4 in the direction of the angle 7a, ie on the suction channel 4 between the two inner side fluid seals 8 An air passage 9 for drawing in the airflow. The air passage 9 now has a width of 37 mm, while the two side suction ports 7 each have a width of 35 mm in the region of the suction channel 4 . By the above dimensions, it is achieved that 45% of the suction airflow flows through the central suction section 6 by the suction passage 4, while the remaining 55% is evenly distributed over the two side suction section 7.

The two side suction section 7 extends from the suction channel 4 towards the opposite side 9a of the nozzle and has a lateral opening 10 on its top end on the side 9a, respectively. The side suction section 7 has a constant height 22 mm along its extension from the suction channel 4 towards the side 9a, while the width of the side suction section 7 linearly from the 35 mm on the suction channel 4 first in the side suction section The curved portion 9b of 7 is reduced to 26 mm before and then reduced to 25 mm on the opening 10. When the side suction port section 7 is first extended away from the bottom side 6a or away from the front side of the suction nozzle by the suction passage 4 at an angle of 67.5°, the curved portion 9b urges the opening 10 to be perpendicular or approximately perpendicular to the bottom edge 6a, respectively. Or the front extension of the nozzle.

On the opening 10, the two side suction port sections 7 are partially closed by a connecting member 10a, respectively, by which a U-shaped window as a side opening 10 of the side suction port section 7 is formed. The flat connecting part 10a (also referred to as the throttle wall) is designed in one piece with the housing 1 and is perpendicular to the floor and perpendicular to the front side of the nozzle from the housing 1 to the floor with a material thickness of 2.5 mm. The direction extends such that an opening width of each side suction port section 7 of 7.6 mm is formed between the floor and the opening 10 towards the lower edge of the floor.

Similar to the suction port 5 and the bottom plate 2, the central suction port section 6 has the shape of an isosceles triangle, wherein the two inner side fluid seals 8 fluidly define the central suction port section 6 on the sides. As described above, the air passage 9 leading to the suction passage 4 is provided at the tip of the central suction port section, and the central suction port area is at least partially sealed at the bottom edge 6a or the front surface of the suction nozzle. The fluid seal 11 on the front side of the segment 6.

The front side fluid seal 11 is designed as a soft sealing lip so that coarse particles can pass through the sealing lip. The coarse particles in the central suction port section 6 are carried by the inspiratory flow and are drawn through the suction passage 4. The front side fluid seal 11 extends from the bottom plate 2 to the floor, wherein a gap of approximately 50 mm is formed laterally between the fluid seal 11 on the front side and the corner 7a of the nozzle, respectively. The fluid seal 11 thus designed as the front side of the sealing lip is rough The particles are deflected into the suction chamber 3 without touching the inner side fluid seal 8 here.

The occurrence of noise pollution caused by the suction air flow has been reduced by the fluid seal 11 on the front side, and the device 12 for the sound barrier is provided for further reducing noise pollution, which device is designed as a housing in the illustration of FIG. A one-piece, V-shaped strip that is oriented by the bottom panel 2 towards the floor, but does not touch the floor here. In the central suction port section 6, the device 12 designed for the sound barrier is arranged between the suction channel 4 and the bottom edge 6a forming the front side of the nozzle in the direction of the suction air flow.

The spacing between the fluid seal 11 on the front side and the device 12 for the sound barrier is 15 mm, and the spacing between the device 12 for the sound barrier and the side fluid seal 8 on the inside is 22 mm, respectively. The device 12 for the sound barrier can alternatively also consist of two rows of brushes of about 5 cm length, which are arranged offset from each other by about 30[deg.] on the bottom plate 2 in order to prevent the movement from the suction channel 4 Direct direct sound emission from the front.

The side suction section 7 is realized by the above-described design of the side suction section 7 which is tapered in its cross section, which is partially closed on the two sides 9a by the connecting part 10a, respectively. Higher fluid velocity or greater volumetric flow, thereby achieving substantially better fine dust absorption, especially fine seam dust absorption from seams and gaps, relative to designs known in the prior art . Since the suction port 5 has a relatively small vacuum attachment area, the above design is characterized by a relatively small propulsive force. On the other hand, since the central suction port section 6 is designed to be open opposite thereto, the suction nozzle additionally has a feature of very effective coarse particles. Absorption, wherein the device 12 for the sound barrier and the fluid seal 11 on the front side only produce low noise pollution.

1‧‧‧shell

2‧‧‧ bottom plate

3‧‧‧Inhalation room

4‧‧‧Inhalation channel

5‧‧‧Inhalation

6‧‧‧Central suction section

6a‧‧‧Bottom

7‧‧‧Side suction section

7a, α‧‧‧ corner

8‧‧‧Side fluid seals

9‧‧‧Air passage

9a‧‧‧ side

9b‧‧‧Bend

10‧‧‧ openings

10a‧‧‧Connecting parts

11‧‧‧ front side fluid seals

12‧‧‧Devices for sound barriers

Claims (10)

A suction nozzle for a cleaner that absorbs dirt and/or dust from a floor by means of a suction airflow, having a housing, a suction chamber formed inside the housing, for guiding the suction airflow and opening into the suction chamber a suction passage and a suction port forming a bottom side opening of the suction chamber, wherein the suction port has a central suction port section and two side suction port sections on both sides of the central suction port section, Furthermore, the side suction opening section is designed in such a way that the cross section of the side suction opening section extends away from the suction channel toward the opposite side faces of the suction nozzle and passes over the top end thereof. The connecting part is partially closed. A nozzle according to the above claim, wherein the cross section of the side suction section is linearly, stepped and/or tapered in a curved shape. A nozzle according to any of the preceding claims, wherein the side suction section is embodied such that the width of the side suction section is at the suction passage 30mm and 40 mm, preferably 33 mm, is gradually narrowed to the side of the nozzle before the connecting member 20mm and 30 mm, preferably 27 mm, wherein the height of the side suction section on the suction passage and on the side of the nozzle before the connecting member is 20mm and 30 mm, preferably 22 mm. The nozzle according to any one of the preceding claims, wherein the connecting member extends forwardly away from the housing toward the floor, and the connecting member is on the side of the nozzle Forming an opening in the side suction port section, the opening having 6mm and a height of 10 mm, preferably 7.6 m, and 20mm and A width of 30 mm, preferably 25 mm. A nozzle according to any one of the preceding claims, wherein the connecting member is designed in one piece with the housing and has 2mm and A thickness of 4 mm, preferably 2.5 m. The nozzle according to any one of the preceding claims, wherein the side suction port section has a curved portion on the side surface of the suction nozzle, and the curved portion is preferably formed such that The curved portion reduces the width of the side suction port section and/or the opening of the side suction port section formed on the side surface of the suction nozzle by the connecting member is perpendicular to the central suction The opening in front of the mouth section extends. A nozzle according to any one of the preceding claims, wherein the suction port has the shape of an isosceles triangle, and the suction passage preferably opens into the region of the tip between the sides of the triangle In the formed suction chamber, the central suction port section extends from the suction passage to the bottom edge of the isosceles triangle and the side suction section is along the respective sides of the isosceles triangle The suction passage extends all the way to the angle of the isosceles triangle disposed opposite the tip. The nozzle according to any one of the preceding claims, wherein the two side suction port sections extend away from the suction passage to the side of the suction nozzle, respectively, such that the two side suction inlet sections The angle α between the longitudinal extension directions is 45° α 160°, preferably 90° α 135°, particularly preferably angle α 135°, or two of the side suction port sections extend away from each other along the curve by the suction passage. A nozzle according to any one of the preceding claims, wherein the side suction port sections are respectively defined by inner and outer side fluid seals extending from the suction passage toward the side of the suction nozzle, thereby The central suction port section is defined by a side fluid seal of the inner side of each of the side suction port sections. A nozzle according to any of the preceding claims, wherein the suction port has an additional central suction port section and two additional side suction ports on either side of the further central suction port section. a section, and wherein the central suction section and the additional central suction section extend away from the suction passage in opposite directions such that the two side suction sections and the two other sides The suction port section forms an X-shaped layout.