TWI629040B - Hard floor nozzle for absorbing coarse particles and fine dust - Google Patents

Abstract

The present invention relates to a suction nozzle of a vacuum cleaner that absorbs dirt and / or dust from a floor by a suction airflow, which has a housing, a suction chamber formed inside the housing, a suction channel for guiding the suction airflow and passing into the suction chamber, and A suction port is formed as a bottom opening of the suction chamber, wherein the suction port has a central suction port section and two lateral suction port sections on both sides of the central suction port section, and the central suction port section is designed as such That is, the width of the central suction port section is increased from the suction channel toward the front of the nozzle and the height of the central suction port section is increased from the suction channel toward the front of the nozzle. 6 ° and An angle of 10 ° drops.

Description

Hard floor 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, which has a housing, a suction chamber formed inside the housing, a suction channel for guiding the suction airflow and passing into the suction chamber and A suction port is formed as a bottom opening of the suction chamber.

Suction nozzles are known in practice, which are called attachments, also simply referred to as suction nozzles or hard floor nozzles or carpet nozzles according to the purpose of use, and these nozzles are usually used with vacuum cleaners to absorb dirt and / or dirt from the floor. dust. A vacuum cleaner having such a suction nozzle usually has a base casing in which an electric suction engine for forming an intake air flow is provided. The suction nozzle is usually fluid-tightly connected to the vacuum cleaner via a flexible suction hose and / or a control tube. In the vacuum cleaning robot, the suction nozzle is generally integrated in the base casing itself. The suction nozzle is provided with a plurality of brush rows or the like for removing dirt and / or dust from the floor. The dust and / or dirt thus detached from the floor is carried by the inhaled airflow and is separated in a dust filter bag at least in a dust collection chamber provided in the base housing.

Dirt or dust to be removed from the floor is divided into coarse particles and fine dust according to various particle sizes. In the prior art, nozzles optimized for the absorption of coarse particles are known on the one hand, and on the other hand are designed for particularly good Nozzle for fine dust absorption. For example, hard floor nozzles are generally not provided for sucking 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 usually causes the brush row to protrude from the suction nozzle, and the distance between the suction nozzle and the floor is increased by the brush row, so that coarse particles can be better absorbed or sucked in. However, the nozzles known in the prior art can only meet the opposite and opposite requirements (that is, either for coarse particle absorption or fine dust absorption), or must be manually performed by the user between different operating modes Switch.

Summary of invention

Based on this, the object of the present invention is to specify a suction nozzle for absorbing dirt and / or dust, which nozzle is universal for different particle sizes and has the feature of being able to absorb coarse particles particularly well. The nozzle can absorb both coarse particles and fine dust, without having to manually switch the operating mode of the nozzle for this purpose. Furthermore, it is expected that such nozzles are characterized by a small propulsion force and / or a low noise pollution.

The object of the invention is achieved by the features described in the independent claims. Advantageous designs are described in the dependent claims.

Accordingly, this object is achieved by a suction nozzle of a vacuum cleaner that sucks dirt and / or dust from a floor by suction airflow, the suction nozzle having a housing, a suction chamber formed inside the housing, for guiding the suction airflow and passing to A suction channel in a suction chamber and a suction port forming a bottom 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, and the central The suction section is designed such that the width of the central suction section increases from the suction channel toward the front of the nozzle and the height of the central suction section extends from the suction channel toward the front of the nozzle. 6 ° and An angle of 10 ° drops.

An important point of the present 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 divided in particular by the side suction opening section and in particular through the central suction The mouth section divides the area for coarse particles. Through the above design of the central suction port section (the central suction port section has a width that gradually increases from the suction channel toward the front of the suction nozzle, for example, it has a V-shaped design in a plan view, and has a 6 ° and An angle of 10 [deg.] (Height) can advantageously disperse coarse particles during the propulsion process, that is, coarse particles are mechanically transported to the suction channel in addition to the direction of the air flow. In addition to this type of "funter effect", the central suction section also acts as a fluid diffuser due to its lowered height, thus achieving a substantially better performance compared to designs known in the prior art Coarse particles absorb. The suction air flow passing through the side suction port section and the central suction port section merges with each other in the area of the suction channel, and the suction air flow having dirt or dust absorbed from the floor is removed from the suction nozzle, for example, by a connecting sleeve. Guide out. The terms mentioned above for describing the arrangement of the parts of the nozzle are based on the position and orientation of such nozzles, such as the state they exist when sucking the floor in a running state, where the nozzles are placed on the floor And exercise on the floor.

According to a preferred embodiment of the suction nozzle, the width of the central suction opening section increases linearly, in a stepped and / or curved manner, The height of the inlet section decreases linearly, in a stepped manner and / or in a curved manner, and / or the height decreases at an angle of 8 °. The combination with a straight descending height at an angle of 8 ° has proven to be particularly advantageous.

According to another preferred embodiment, the suction nozzle has a device for a sound barrier, which device is arranged in the central suction section in the direction of the suction airflow between the front face of the suction nozzle and the suction channel. According to a further preferred embodiment, a front-side fluid seal is provided, which is implemented and designed to define a central suction opening section at least in sections on the front face of the suction nozzle. Especially in the case of the open shape of the central suction port section, the noise pollution of the suction nozzle can be reduced by providing a device for a sound barrier and / or a fluid seal on the front side. The device for the sound barrier and / or the fluid seal on the front side are preferably designed and / or dimensioned in such a way that the nozzle meets the requirements of Ökodesign-Verordnung (EU) No. 666/2013 for vacuum cleaners and / Or the loudness caused by the suction airflow during the suction operation of the floor nozzle does not exceed 80dB (A).

According to a likewise preferred embodiment, the front-side fluid seal is divided into two parts, wherein the device for the sound barrier is arranged between the two parts along the front face of the suction nozzle. The device for the sound barrier is formed, for example, by two brush rows of approximately 5 cm in length, which are arranged on the housing offset from one another by approximately 30 °. In the direction of extension perpendicular to the direction of advancement, the device for the sound barrier is preferably surrounded from both sides by the parts of the fluid seal on the front side in such a way that direct sound emission from the suction channel towards the front is reduced or prevented as much as possible.

According to a particularly preferred embodiment, the side suction opening sections are respectively The inner and outer side fluid seals extending from the suction channel to one side of the suction nozzle are defined so that the central suction port section is defined by the inner side fluid seals of each side suction port section. The inner and outer side fluid seals can basically be arbitrarily set as a seal for sucking airflow, but among them, the side fluid seals are preferably designed as one or more rows of brush rows, sealing lips and / or these combination. In addition, the side fluid seal may be formed at least through a part of the housing, such as a baffle or wall protruding through the housing in the direction of the floor. The inner and outer side fluid seals more preferably extend substantially parallel or substantially parallel to each other between the suction channel and the side of the nozzle.

Preferably, the cross section (suction channel) of the side suction port section has an outlet in the range of the suction channel, the outlet having a width of 60mm, 50mm, 40mm, 35mm, 33mm, 30mm or 20mm, where the height of the outlet is preferably 50mm, 40mm, 30mm, 22mm, 20mm or 10mm. On the floor side of the housing, the width of the inlet of the side suction section is preferably 50mm, 40mm, 35mm, 25mm, 20mm or 10mm, where the height of the inlet is preferably 20mm, 10mm, 7.6mm, 5mm or 2mm. With smaller widths and / or heights, a better suction effect can be achieved. More preferably, an air passage is formed in the suction passage between the two side suction port sections, and the air flow is sucked through the air passage 45% and 65% of it flows through the central suction section. The opening width of the air passage is preferably 25 mm, 30 mm, 32 mm, 37 mm, 40 mm, or 45 mm. The width of the central suction opening section on the front of the suction nozzle is preferably equal to or approximately equal to the width of the suction nozzle. With such a distribution of the suction air flow between the central suction opening section and the side suction opening section, particularly good absorption of fine dust and coarse particles can be achieved.

More preferably, the side suction port section (suction channel) extends linearly away from the suction channel toward the ground or the side of the suction chamber, but it is also possible that the suction port section (suction channel) is in a bent form and / Or curve-shaped side extending away from the suction channel toward the ground. The brush or sealing lip preferably extends vertically away from the housing toward the floor and is designed to be soft, so that during the process of advancing the nozzle in the normal advancement direction, coarse particles or fine dust on the floor reach the center through the brush or sealing lip 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 channel and the central suction port section.

According to another preferred embodiment, the front fluid seal can be deflected into the suction chamber and dimensioned such that the front fluid seal can be fully deflected into the suction chamber without touching the inner side fluid. Seals. This ensures that the front-side fluid seal can be recovered unimpeded into the undeflected initial position after passing through the coarse particles.

According to another preferred design, the fluid seal on the front side has a rectangular shape, where the fluid seal on the front side extends from the housing to the floor with the suction nozzle placed on the floor, away from the fluid seal on the side And / or rounding on the side away from the casing, the front side fluid seal has a first region extending from the casing to the floor and a second region connected thereto, wherein, relative to the first region, the second region has a It is characterized by lower strength, and / or the front side fluid seal is extended at an angle with respect to the floor normal (curved) in the direction of the suction chamber when the nozzle is placed on the floor Meaning). It is preferable that the front side fluid seal is arranged at an angle in the pushing direction at a certain angle in its undeflected state, that is, in the case where there is no intake air flow nearby and the pushing in the pushing direction only by the suction nozzle, Coarse particles outside the central suction section are conveyed into the central suction section. More preferably, the front fluid seal is designed such that a gap is formed between the front fluid seal and the two inner side fluid seals, respectively. The gap preferably extends over at least 50 mm.

In principle, different possibilities exist for designing devices for sound barriers. However, it is particularly preferred that the device for the sound barrier has a V-shaped or semi-circular shape that is open toward the back of the nozzle, and / or the device for the sound barrier is made of plastic, and / or if a front side is provided The fluid seal, the device for the sound barrier is made of a harder material than the fluid seal on the front side. According to another preferred design, the front side fluid seal is designed as a plurality of devices for sound barriers that draw in airflow, wherein the devices for sound barriers that draw in airflow are provided along the front of the housing. In another preferred design, the fluid seal on the front side is arranged spaced apart from the front side between the suction channel and the front side of the housing or on one edge of the housing on the front side and / or parallel to the front side extend.

According to a particularly preferred embodiment, the suction opening and / or the central suction opening section have the shape of an isosceles triangle, wherein the suction passage preferably opens into the suction chamber thus formed in the region of the tip between the sides of the triangle. In the central suction port section, the suction channel extends from the suction channel to the bottom of the isosceles triangle, and the side suction port section extends along the sides of the isosceles triangle from the suction channel to the corners of the isosceles triangle opposite the tip. . Pass on According to the design, the coarse particle area formed by the central suction port section is basically arranged before the fine dust area formed by the side suction port section during the advancement of the suction nozzle, wherein the side suction port section is oppositely provided at the tip. The corners of the isosceles triangle are adjacent to the central inlet section. As a result, fine dust absorption is achieved in an advantageous manner at least in the corner regions of the nozzle and all the way to the front of the nozzle.

According to another preferred design, the two side suction port sections extend away from the suction channel and respectively extend to one side of the suction nozzle, so that the angle α between the longitudinal extension directions of the two side suction port sections is 45 °. α 160 °, preferably 90 ° α 135 °, particularly preferably the included angle α is equal to or substantially equal to 135 °, or the two side suction inlet sections extend away from each other along the curve by the suction channel. If the two side suction port sections extend linearly or approximately straightly between the suction channel and one side of the nozzle, such as suction ports provided along the sides of an isosceles triangle, the central suction port section is preferably It has the shape of an isosceles triangle, and its bottom edge is oriented along the direction of the front of the nozzle.

According to a preferred embodiment, the suction opening has a further central suction opening section and two further lateral suction opening sections on both sides of the further central suction opening section, wherein the central suction opening section and the further The central suction port section extends away from the suction channel in opposite directions, so that two side suction port sections and two other side suction port sections form an X-shaped layout. The suction nozzle designed in this way can absorb coarse particles both during forward and backward. The suction nozzle is preferably designed symmetrically, especially mirror-symmetrically, during the forward and backward movements. More preferably, the suction channel represents the midpoint of the design, the central suction port section and the two side suction port sections, and in particular the mirror-symmetrically opposite central suction section and two further suction port sections. The side suction inlet section extends away from the midpoint. In this design, instead of manually rotating the nozzles known in the prior art around 180 °, in order to absorb coarse particles during forward and backward, the user can simply move the nozzles forward and backward.

1‧‧‧shell

2‧‧‧ bottom plate

3‧‧‧ inhalation chamber

4‧‧‧ Suction channel

5‧‧‧ Suction port

6‧‧‧ Central suction section

6a‧‧‧bottom

7‧‧‧Side suction section

7a‧‧‧ corner

8‧‧‧ side fluid seal

9‧‧‧air passage

11‧‧‧ front fluid seal

12‧‧‧ Device for sound barrier

Subsequently, the present invention will be further explained with reference to the accompanying drawings by means of preferred embodiments. Among them: FIG. 1 shows a suction nozzle according to a preferred embodiment of the present invention in a bottom view, and FIG. 2 shows a suction nozzle according to FIG. 1 in a perspective view.

According to a preferred embodiment of the present invention, FIGS. 1 and 2 show schematic bottom views of a suction nozzle, also referred to as a floor nozzle. The nozzle has a casing 1 made of plastic, and a bottom plate 2 is formed on the bottom of the casing. A suction chamber 3 is formed below the bottom plate 2, and the suction passage 4 opens into the suction chamber, and the suction chamber 5 forms a suction port 5 as an opening 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 6 a of the isosceles triangle represents the front side of the suction nozzle in the advancing direction.

The suction channel 4 is fluid-tightly connected to a connection sleeve (not shown) provided on the upper side of the housing 1. On the connecting sleeve, a control tube and / or a flexible hose can be fluid-tightly connected to a base housing of the vacuum cleaner, in which an electrically driven extraction engine for forming an intake air flow is provided. Dirt and / or dust carried by the suction air from the floor to be cleaned in the dust collection chamber provided in the base body can be separated in the dust filter bag.

The suction opening 5 has a central suction opening section 6 and two lateral suction opening sections 7 located on either side of the central suction opening section 6 or surrounding the central suction opening section 6 from the side. The side suction port sections 7 are linearly extended toward the corners 7a of the isosceles triangle from the suction channels 4, respectively, so that the angle α between the longitudinal extension directions of the two side suction port sections 7 is 135 °. The side suction opening section 7 is fluidically defined by the inner and outer side fluid seals 8. The outer side fluid seal 8 extends from each corner 7a of an isosceles triangle along each side and meets each other in a semicircle between the two sides that partially define the suction channel 4.

Accordingly, the entire back surface of the suction nozzle is defined by the outer side fluid seals 8 which are mainly provided as brush rows. The inner side fluid seal 8 is approximately parallel to the outer side fluid seal 8 away from the suction channel 4 in the direction of the angle 7a, that is, a suction channel 4 is formed between the two inner side fluid seals 8 Air passage 9 for suction airflow. The air passage 9 now has a width of approximately 32 mm, while the two side suction inlet sections 7 each have a width of approximately 33 mm in the region of the suction channel 4. With the above dimensions, it is realized that about 45% of the suction air flow flows through the central suction port section 6 from the suction passage 4, and the remaining part of about 55% is evenly distributed on the two side suction port sections 7.

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 define the sides of the central suction port section 6 in a fluid-tight manner. As described above, the air passage 9 leading to the suction passage 4 is provided on the tip of the central suction port section 6, and is provided on the bottom edge 6a opposite to the front side of the suction nozzle so as to be opposed to it. The fluid seal 11 on the front side of the central suction port section 6 is at least partially sealed.

On the one hand, the width of the central suction port section 6 increases in a funnel-like or V-shaped manner from the suction channel 4 in a straight line to the bottom edge 6a or the front of the nozzle. From the suction channel 4, the height decreases linearly toward the bottom edge 6a or the front of the nozzle at an angle of about 8 °. As a result, the central suction opening section 6 functions as a type of fluid diffuser, so that the central suction opening section 6 designed in this way can absorb coarse particles particularly well.

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 suction air flow and sucked through the suction channel 4. The front fluid seal 11 extends from the bottom plate 2 to the floor, but a gap of approximately 50 mm is formed laterally between the front fluid seal 11 and the corner 7a of the suction nozzle. The front-side fluid seal 11 designed as a sealing lip is thus deflected into the suction chamber 3 as it passes through the coarse particles, without touching the inner side fluid seal 8 here.

The occurrence of noise pollution caused by the inhaled air flow has been reduced by the fluid seal 11 on the front side, and in order to further reduce the noise pollution, a device 12 for a sound barrier is provided, which is designed in the diagrams of FIGS. The housing 1 is a one-piece, V-shaped strip, which is oriented towards the floor by the bottom plate 2 but does not touch the floor here. In the central suction opening section 6, the device 12 for sound barriers thus designed is arranged in the central suction opening section 6 in the direction of the suction airflow between the bottom edge 6 a forming the front face of the suction nozzle and the suction passage 4. In alternative designs not shown, the device 12 for sound barriers can also be provided on the front of the central suction section 6 or on the suction nozzle. The front side is provided between portions of the fluid seal 11 on the front side. Likewise, the fluid seal 11 on the front side can be designed as a plurality of devices 12 for sound barriers, which are arranged forward and backward by crossing the front face of the central suction port section 6 transversely to the advancing direction.

The distance between the fluid seal 11 on the front side and the device 12 for a sound barrier is about 15 mm, and the distance between the device 12 for a sound barrier and the inner side fluid seal 8 is about 22 mm, respectively. The device 12 for sound barriers may alternatively also consist of two brush rows of approximately 5 cm in length, which are arranged on the bottom plate 2 staggered at approximately 30 ° from each other, so that at least the suction passage is restricted 4 Direct sound emission to the front of the nozzle.

According to the above-mentioned design scheme of the central suction port section (the central suction port section has a width gradually increasing from the suction passage to the front of the suction nozzle and has 6 ° and The angle of 10 ° gradually decreases) achieves a particularly effective absorption of fine dust and coarse particles without the need to manually switch between fine dust and coarse particles, as is the case in designs known from the prior art. In addition, the size of the side suction port section 7 verified by the test also achieves a higher fluid velocity and a larger volume flow, which in addition promotes very good and effective fine dust absorption. Since the suction port 5 has a relatively small vacuum attachment area, the above-mentioned design scheme is characterized by a relatively small propulsive force. On the other hand, because the central suction opening section 6 is designed to be open in contrast thereto, the suction nozzle additionally has the feature of very effective absorption of coarse particles, wherein, due to the device 12 for the sound barrier and the fluid seal on the front side Piece 11 only produces lower noise pollution.

Claims (14)

A suction nozzle of a vacuum cleaner that absorbs dirt and / or dust from a floor by means of a suction airflow, which has a housing, a suction chamber formed inside the housing, and a guide for guiding the suction airflow and passing into the suction chamber. A suction channel and a suction port forming a bottom opening of the suction chamber, wherein the suction port has a central suction port section and two side suction port sections located on both sides of the central suction port section, Moreover, the central suction port section is designed such that the width of the central suction port section increases from the suction channel toward the front of the suction nozzle and the height of the central suction port section is determined by the suction The channel faces the front of the nozzle to 6 ° and The angle decreases by 10 °, characterized in that the suction nozzle has a sound barrier device for the suction airflow, and the device for the sound barrier is provided in the central suction port section in the direction of the suction airflow. Between the front face of the suction nozzle and the suction channel. The suction nozzle according to claim 1, wherein the width of the central suction port section increases linearly, in a stepped and / or curved manner, and the height of the central suction port section linearly , Descending in a stepped and / or curvilinear manner and / or the height is descending at an angle of 8 °. The suction nozzle according to claim 1 or 2, wherein the suction nozzle has a front-side fluid seal, and the front-side fluid seal is implemented and designed to be at least sectionally on the front face of the nozzle The central suction port section is defined. The nozzle according to claim 3, wherein the front side fluid seal is divided into two parts and the means for a sound barrier is provided between the two parts along the front side of the nozzle. The suction nozzle according to claim 1, wherein the side suction opening sections are respectively defined by inner and outer side fluid seals extending from the suction passage to the side of the suction nozzle, so that the central suction opening Sections are defined by a side fluid seal on the inside of each of the side suction port sections. The suction nozzle according to claim 3, wherein the side suction port sections are respectively defined by inner and outer side fluid seals extending from the suction channel to the side of the suction nozzle, so that the central suction port Sections are defined by side fluid seals inside each of the side suction port sections, and wherein the front side fluid seal is designed to be deflected into the suction chamber and is sized to allow fluid from the front side The seal can be fully deflected into the suction chamber without touching the inner side fluid seal. The suction nozzle according to claim 3, wherein the side suction port sections are respectively defined by inner and outer side fluid seals extending from the suction channel to the side of the suction nozzle, so that the central suction port A section is defined by a side fluid seal inside each of the side suction port sections, and wherein the front side fluid seal has a rectangular shape, and in a case where the suction nozzle is placed on a floor, the The front fluid seal extends from the housing to the floor, and is rounded on the side away from the side fluid seal and / or away from the housing, the front fluid seal has A first region extending toward the floor and a second region connected thereto, wherein the second region is characterized by a lower strength relative to the first region, and / or the fluid seal of the front side When the suction nozzle is placed on the floor, the piece extends in the direction of the suction chamber and is provided curvedly with respect to the normal of the floor. The suction nozzle according to claim 3, wherein the side suction port sections are respectively defined by inner and outer side fluid seals extending from the suction channel to the side of the suction nozzle, so that the central suction port Sections are defined by the side fluid seals inside each of the side suction port sections, and wherein the front side fluid seal is designed such that the front side fluid seal and the two inner side A gap is formed between the side fluid seals. The nozzle according to claim 1 or 2, wherein the device for a sound barrier has a V-shaped or semi-circular shape that is open toward the back of the nozzle, and / or the device for sound The device of the barrier is made of plastic, and / or if the front-side fluid seal as described in claim 4 is provided, the device for a sound barrier is made of a harder material than the front-side fluid seal Make up. The suction nozzle according to claim 3, wherein the front side fluid seal is designed as a plurality of the devices for inhaling airflow for a sound barrier and the devices for inhaling airflow along the device for a sound barrier The front surface of the casing is provided. The suction nozzle according to claim 3, wherein the front side fluid seal is provided at a distance from the front surface between the suction passage and the front surface of the housing or is provided on the front surface The housing extends on one edge and / or parallel to the front face. The suction nozzle according to claim 1 or 2, wherein the suction opening and / or the central suction opening section have the shape of an isosceles triangle, and the suction passage is preferably between the sides of the triangle. Into the region of the tip, the suction chamber formed in such a way, the central suction port section extends from the suction channel to the bottom edge of the isosceles triangle and the side suction port section runs along the Each side of the isosceles triangle extends from the suction channel all the way to the corner of the isosceles triangle that is opposite to the tip. The suction nozzle according to claim 1 or 2, wherein the two side suction port sections extend away from the suction channel and respectively extend to one side of the suction nozzle, so that the two The angle α between the longitudinal extension directions is 45 ° α 160 °, preferably 90 ° α 135 °, particularly preferably the included angle α is equal to or substantially equal to 135 °, or the two side suction port sections extend away from each other along the curve by the suction channel. The suction nozzle according to claim 1 or 2, wherein the suction port has a further central suction port section and two further side suction port sections on both sides of the further central suction port section And the central suction port section and the other central suction port section extend away from the suction channel in opposite directions, so that the two side suction port sections and the two other side suction ports The sections form an X-shaped layout.