阅读说明：本技术 手持式旋风真空吸尘器 (Hand-held cyclone vacuum cleaner ) 是由 安娜-莱娜·科德斯 瓦尔德玛·克劳斯 迈克尔·波廷 于 2021-05-06 设计创作，主要内容包括：本发明涉及一种手持式旋风真空吸尘器,包括：用于收集抽吸材料的分离单元,该分离单元包括用于产生抽吸流的驱动系统(5)、第一过滤器级(6)、第二过滤器级(7)和第三过滤器级(8)；其中,所述驱动系统(5)布置在驱动系统壳体(15)中,所述驱动系统壳体(15)按照所述抽吸流而位于所述第二过滤器级(7)的下游并且按照所述抽吸流而位于所述第三过滤器级(8)的上游,其中,在所述驱动系统(5)的操作期间产生的所述抽吸流围绕所述驱动系统(5)流动。(The present invention relates to a handheld cyclone vacuum cleaner comprising: a separation unit for collecting suction material, the separation unit comprising a drive system (5) for generating a suction flow, a first filter stage (6), a second filter stage (7) and a third filter stage (8); wherein the drive system (5) is arranged in a drive system housing (15), the drive system housing (15) being located downstream of the second filter stage (7) according to the suction flow and upstream of the third filter stage (8) according to the suction flow, wherein the suction flow generated during operation of the drive system (5) flows around the drive system (5).)

1. A handheld cyclonic vacuum cleaner comprising a separation unit for collecting suction material, the separation unit comprising a drive system (5) for generating a suction flow, a first filter stage (6), a second filter stage (7) and a third filter stage (8); wherein the drive system (5) is arranged in a drive system housing (15), the drive system housing (15) being located downstream of the second filter stage (7) according to the suction flow and upstream of the third filter stage (8) according to the suction flow, wherein the suction flow generated during operation of the drive system (5) flows around the drive system (5).

2. The vacuum cleaner as claimed in claim 1, characterized in that the drive system (5) is arranged in the drive system housing (15) such that the inflow direction of the suction flow into the drive system (5) is opposite to the flow direction of the suction flow from the second filter stage (2) to the third filter stage (8).

3. A vacuum cleaner as claimed in claim 1 or 2, characterized in that the first filter stage (6) has a cyclone created during operation of the drive system (5), the second filter stage (7) has a pre-filter and the third filter stage (8) has a central filter, the pre-filter and the central filter being arranged axially, the first filter stage (6), the second filter stage (7) and the third filter stage (8) being arranged fluidly one after the other in the specified order.

4. A vacuum cleaner as claimed in any one of the preceding claims, characterized in that the third filter stage (8) is arranged such that the suction flow generated during operation flows axially into the drive system (5).

5. A vacuum cleaner as claimed in any one of the preceding claims, characterized in that the second filter stage (7) is removable from the separation unit in a removal direction which is opposite to a further removal direction in which the third filter stage (8) is removable from the separation unit.

6. The vacuum cleaner as claimed in any of the preceding claims, characterized by a fourth filter stage (9), the fourth filter stage (9) being arranged fluidly downstream of the third filter stage (8) and comprising an exhaust filter element, which is preferably designed as a filter or a fin in an outer housing of the separation unit.

7. Vacuum cleaner according to any of the preceding claims, characterized in that the second filter stage (7) comprises a pre-filter made of a fabric mesh, a plastic screen, a punched mesh or a metal mesh.

8. A vacuum cleaner as claimed in any one of the preceding claims, characterized in that the third filter stage (8) comprises a cylindrical central filter which is sealed off from the drive system (5) and an outer housing (12) of the separation unit.

9. Vacuum cleaner according to any of the preceding claims, wherein the separation unit comprises a drive system container (2) and a separation container (3), the drive system container (2) comprising the drive system housing (15), the drive system (5) and the third filter stage (8), and the separation container (3) comprising the first filter stage (6) and the second filter stage (7), and the drive system container (2) and the separation container (3) being arranged adjacent and each extending along parallel longitudinal axes.

10. Vacuum cleaner according to any of the preceding claims, characterized in that the drive system housing (15) is surrounded by a circular arch shaped flow cross section through which the suction flow flows during operation before reaching the third filter stage (8).

Technical Field

The present invention relates to a handheld cyclonic vacuum cleaner, which for simplicity will be referred to hereinafter as a vacuum cleaner. In particular, the present invention relates to a vacuum cleaner comprising a separation container for receiving suction material and a drive system container comprising a drive system designed to generate a suction air flow during operation.

Background

Such a vacuum cleaner is known from WO2017/046559a 1. The vacuum cleaner comprises two filter stages implemented using cyclone technology, making it designed as a multi-stage cyclone. The vacuum cleaner further comprises a third filter stage fluidly downstream of the multi-stage cyclonic separator, the third filter stage being built around the enclosed radial fan. Axial outflow from the fan is directed through an exhaust filter. However, the flow against each filter stage requires a relatively large amount of space.

Disclosure of Invention

Accordingly, the problem addressed by the present invention is to provide a handheld cyclonic vacuum cleaner comprising a plurality of filter stages implemented in a compact installation space. Furthermore, the filter stage should be accessible to the user.

According to the invention, this problem is solved by a handheld cyclonic vacuum cleaner having the features of claim 1. Advantageous embodiments and developments of the invention can be gathered from the dependent claims below.

The present invention provides a compact vacuum cleaner having multiple filter stages. The implementation of a plurality of filter stages contributes to the realization of a particularly efficient separation unit with a particularly selective first filter stage. At the same time, all filter stages of the separation unit that need to be cleaned regularly are arranged for easy access by the user.

The present invention relates to a handheld cyclonic vacuum cleaner comprising a separation unit for collecting suction material, the separation unit comprising a drive system for generating a suction flow, a first filter stage, a second filter stage and a third filter stage; wherein the drive system is arranged in a drive system housing, which is located downstream of the second filter stage according to a suction flow and upstream of the third filter stage according to a suction flow, wherein the suction flow generated during operation of the drive system flows around the drive system. In this case, the drive unit is arranged spatially between the second filter stage and the third filter stage in the drive system housing. The fact that the suction flow can flow around the drive system in the drive system housing saves installation space.

The expression "handheld" is understood to mean that the vacuum cleaner is carried in the hand of a user when in operation. For this purpose, the vacuum cleaner preferably also has a handle. The handle is preferably rigidly connected or can be rigidly connected to the separation unit.

The term "cyclonic vacuum cleaner" is understood to mean a bagless vacuum cleaner and wherein the suction flow in the separation unit forms a vortex which separates dust and dirt particles from the suction flow under the influence of gravity. The first filter stage of the separation unit of the cyclonic vacuum cleaner forms a longitudinal axis about which the suction flow forms a vortex during operation of the drive system, the longitudinal axis of the first filter stage being aligned parallel to the longitudinal axis of the suction duct. The parallel alignment of the first filter stage and the longitudinal axis of the suction duct helps to achieve a vacuum cleaner with a compact design.

The term "bagless" is understood to mean that in a vacuum cleaner, the suction material is collected directly in the separation unit without a bag or similar replaceable filter medium for receiving suction material being arranged therein, so that a user does not remove the bag or the like from the separation container in order to empty the suction material from the separation unit. However, the vacuum cleaner includes a plurality of filter media that prevent suction material from entering the drive system disposed in the drive system housing.

In a preferred embodiment, the drive system is arranged such that the inflow direction of the suction flow into the drive system is opposite to the flow direction of the suction flow from the second filter stage to the third filter stage. Thus, when the generated suction flow travels inside the vacuum cleaner, the direction of the generated suction flow also changes by 180 °. The drive system, which is preferably designed as a fan, is preferably rotated by 180 ° relative to the suction duct of the vacuum cleaner, into which suction flow enters before entering the three filter stages. In other words, the flow direction of the suction flow into the suction tube is opposite to the other flow direction of the suction flow into the drive system.

Preferably, the first filter stage has a cyclone created during operation of the drive system, the second filter stage has a pre-filter, and the third filter stage has a central filter. The central filter preferably comprises a storage medium designed to store dust. Which is preferably designed as a fine filter. The pre-filter essentially acts as a filter protector for the central filter and is essentially designed to prevent coarse particles from entering the space between the second filter stage and the third filter stage.

The pre-filter and the central filter are preferably arranged axially along the longitudinal axis of the separation unit. The separation unit preferably extends along a longitudinal axis. The pre-filter and the central filter preferably each extend parallel to the longitudinal axis.

The first, second and third filter stages are preferably fluidly arranged one after the other in a specified order. This means that the generated suction flow passes first through the first filter stage, then through the second filter stage and finally through the third filter stage.

In a preferred embodiment, the first filter stage further comprises an inlet slot arranged such that, during operation, suction flow is directed tangentially from the inlet slot to the inner wall of the separation vessel such that, during operation, a cyclone is formed in the first filter stage. Cyclone vortices are formed in the first filter stage during operation, so that particles with a specific pressure loss and a specific cut size are separated out. The first filter stage preferably comprises the inlet tank, the inner wall and a dip tube (dip tube). The dip tube is preferably rigidly connected to the inner wall and arranged on the side of the inner wall facing away from the second filter stage. The inlet slot preferably has a rectangular cross-section.

The vacuum cleaner preferably comprises the suction duct from which a suction flow flows into the inlet slot during operation. The suction duct preferably has a circular cross-section. The suction pipe may preferably be connected to a floor nozzle and/or an extension pipe. The suction tube has a longitudinal axis which is located in the center of its circular cross-section and extends along the entire length of the suction tube.

The second filter stage preferably comprises a pre-filter. The pre-filter is preferably formed from a woven gauze, a plastic screen, a stamped grid or a metal mesh.

The second filter stage preferably further comprises an inner tube connected to the pre-filter. The inner tube is preferably fluidly arranged downstream of the pre-filter and upstream of the third filter stage. The pre-filter is preferably arranged between the inner wall and the inner tube.

In a preferred embodiment, the central filter is a cylindrical filter that is sealed from the drive system and separation unit housing. The central filter preferably comprises a storage medium designed to store dust. Which is preferably designed as a fine filter. The pre-filter essentially acts as a filter protector for the central filter and is essentially designed to prevent coarse particles from entering the space between the second filter stage and the third filter stage.

The third filter stage is preferably arranged such that the suction flow generated during operation flows axially into the drive system. This allows the vacuum cleaner to have a compact design.

In a preferred embodiment, the second filter stage is removable from the separation unit in a removal direction which is opposite to another removal direction in which the third filter stage is removable from the separation unit. Arranging the second and third filter stages in parallel offset means that both can be removed independently of each other. The pre-filter is preferably detachably connected to an inner wall of the first filter stage, which inner wall is connected to the dip tube, so that the second filter stage can be removed from the separation vessel by removing the dip tube.

In a preferred embodiment, the vacuum cleaner further has a fourth filter stage arranged fluidly downstream of the third filter stage and comprising an exhaust filter element. The exhaust gas filter element is preferably designed as a filter or as a fin in the housing of the separation unit.

In a preferred embodiment, the separation unit comprises a drive system vessel and a separation vessel, the drive system vessel comprising the drive system housing, the drive system and the third filter stage, and the separation vessel comprising the first and second filter stages. The drive system container and the separation container are preferably arranged adjacent and extend along parallel longitudinal axes. The separation vessel and the drive system vessel are preferably permanently connected to each other.

The drive system housing is preferably surrounded by a circular arch shaped flow cross section through which the suction flow flows during operation before it reaches the third filter stage. As a result, the vacuum cleaner is still provided in a compact form. However, the flow cross section of the circular arch shape may be partially interrupted by one or more functional geometries. The drive system housing, the flow cross-section and the central filter are preferably designed and arranged such that a suction flow flows against the circumference of the third filter stage during operation.

The suction duct diameter of said suction duct is preferably substantially equal to the cross-sectional area of said inlet slot with rectangular cross-section. The suction pipe diameter is preferably substantially equal to the filter stage diameter of the inner pipe of the second filter stage and/or to the diameter of the pre-filter. The area of the flow cross-section between the drive system housing and the drive system outer container housing is preferably approximately equal to the area of the suction tube diameter. The diameter is understood to mean in particular the inner diameter.

The diameter of the aspiration tube is preferably in the range 20mm to 40mm, preferably 25mm to 35 mm. The first filter stage preferably has the following dimensions: the cyclone preferably has a diameter in the range of 90mm to 100mm, and the height of the cyclone (which is defined as the dimension between the inlet slot and the inner wall) is preferably in the range of 80mm to 140mm, preferably in the range of 110mm to 130 mm. The height of the dip tube (which represents the longitudinal extent of the dip tube from the inner wall) is preferably in the range 20mm to 60mm, more preferably 30mm to 50mm, and the diameter of the dip tube is preferably 35mm to 60mm, more preferably 40mm to 50 mm. The width of the inlet slot is preferably 14mm to 30mm, preferably 18mm to 26mm, while the height of the inlet slot is preferably 20mm to 52mm, preferably 30mm to 40mm, the height and width of the inlet slot defining the cross section of the inlet slot. The smaller the diameter of the pre-filter, the better the separation between the second and third filter stages and the better their separation efficiency.

The drive system receptacle is preferably connected to the handle. In the operative work position, the drive system receptacle is preferably located at the rear side or end of the vacuum cleaner, which means that it is closer to the user's hand and further away from the surface to be vacuumed than the separating receptacle.

The vacuum cleaner is preferably a cordless vacuum cleaner. In other words, the vacuum cleaner comprises a battery and is designed to be operated by the battery as a power source. The battery may be connected to the smoking material container and/or the device body, preferably the device body.

Furthermore, the vacuum cleaner may comprise an extension tube which may be connected to the suction tube. The vacuum cleaner may further comprise a floor nozzle connectable to the suction duct and the extension duct.

The drive system is preferably designed as a fan.

Drawings

Embodiments of the invention are shown in the drawings in a purely schematic manner and will be described in more detail below. In the drawings:

figure 1 is a partial cross-sectional view of a vacuum cleaner according to the present invention;

figure 2 is a perspective view of the vacuum cleaner shown in figure 1;

figure 3 is a cross-sectional view of the vacuum cleaner shown in figure 2;

figure 4 is another cross-sectional view of the vacuum cleaner shown in figure 2;

figure 5 is another partial cross-sectional view of the vacuum cleaner shown in figure 2;

figure 6 is another cross-sectional view of the vacuum cleaner shown in figure 2;

figure 7 is another cross-sectional view of the vacuum cleaner shown in figure 2;

figure 8 is another cross-sectional view of the vacuum cleaner shown in figure 2; and

figure 9 is another partial cross-sectional view of the vacuum cleaner shown in figure 2.

Detailed Description

Figure 1 is a partial cross-sectional view of a vacuum cleaner according to the present invention. The vacuum cleaner has a separating unit comprising a permanently connected separating vessel 3 and a drive system vessel 2. The separation vessel 3 is designed to collect the suction material, while the adjacent drive system vessel 2 comprises a drive system 5 designed to generate a suction flow. The separation vessel 3 has a first filter stage 6 and a second filter stage 7, while the drive system vessel 2 has a third filter stage 8. The first filter stage 6 has a cyclone created during operation, while the second filter stage 7 has a pre-filter and the third filter stage 8 has a central filter.

The first filter stage 6, the second filter stage 7 and the third filter stage 8 are arranged fluidically one after the other in the order specified. The pre-filter and the central filter are arranged axially. The first filter stage 6 has an inner wall 10 and a dip tube 17. The drive system container 2 comprises a drive system container outer housing 12, into which drive system container outer housing 12 a fourth filter stage 9 in the form of a vent filter is optionally integrated. Furthermore, the drive system container 2 comprises a drive system housing 15, the drive system 5 being mounted in the drive system housing 15.

During operation, the drive system 5 generates a suction flow, which is partially shown by arrows. First, the suction flow passes through the first filter stage 6, where the suction flow hits the inner wall 10 and forms a cyclone. The suction flow then passes through the second filter stage 7 and then flows around the drive system housing 15, being directed towards the third filter stage 8 and flowing against its circumference. After passing through the third filter stage 8, the suction flow reaches the space defined by the drive system housing 15, in which the drive system 5 is located, and can leave this space through the filter stage 9 and thus leave the vacuum cleaner.

Figure 2 is a perspective view of the vacuum cleaner shown in figure 1. The vacuum cleaner has a handle 1 connected to a drive system container 2. The vacuum cleaner further comprises a suction tube 4, which suction tube 4 may optionally also be connected to an extension tube 11 or a floor nozzle (not shown).

During operation, the suction flow first flows through the extension tube 11, through the suction tube 4, then out of the suction tube 4 into the separation vessel 3, then from the separation vessel 3 into the drive system vessel 2, and then out of the vacuum cleaner.

Figure 3 shows a cross-sectional view of the vacuum cleaner shown in figure 2 along the line III-III. The suction duct 4 is arranged upstream of the first filter stage (not shown) and has a circular cross-section with a suction duct diameter D.

Figure 4 shows another cross-sectional view of the vacuum cleaner shown in figure 2 along the line IV-IV. The suction duct 4 is connected to the separation vessel 3 via an inlet slot 14, the inlet slot 14 extending tangentially into the vessel and into the first filter stage 6. During operation, the suction flow is directed tangentially from the suction duct 4 to the inner wall (not shown) of the separation vessel 3, so that a cyclone (not shown) is formed in the first filter stage 6.

Figure 5 shows another partial cross-sectional view of the vacuum cleaner shown in figure 2 along the line IV-IV. The inlet slot 14 has a rectangular cross-section with a width b and a height h. The area of the rectangular cross-section is approximately equal to the area of the diameter of the suction duct shown in figure 3.

Figure 6 shows a further cross-sectional view of the vacuum cleaner shown in figure 2 along the line VI-VI. The inner tube (not shown) of the pre-filter or second filter stage 7, which is located fluidly downstream of the pre-filter, has a circular cross-section of the filter stage diameter d. The area of the filter stage diameter d is approximately equal to the area of the suction duct diameter shown in fig. 3.

Figure 7 shows a further cross-sectional view of the vacuum cleaner shown in figure 2 along the line VII-VII. The drive system 5 is arranged in a drive system housing 15 upstream of a third filter stage (not shown). The area of the cross-section between the drive system housing 15 and the drive system outer container housing 12 is approximately equal to the area of the suction tube diameter shown in fig. 3. The drive system container 2 is connected to the handle 1. During operation, the suction flow flows between the drive system housing 15 and the drive system outer vessel housing 12 with a circular arcuate flow cross section which is interrupted by a functional geometry (not shown).

Figure 8 shows a further cross-sectional view of the vacuum cleaner shown in figure 2 along the line VIII-VIII. The third filter stage 8 is arranged in the drive system container 2 and is surrounded by a drive system outer housing 12. The third filter stage is designed as a central filter. The drive system housing 15 has an opening 16. During operation, the suction flow flows through the central filter and then through the opening 16 into the drive system housing 15.

Figure 9 is another partial cross-sectional view of the vacuum cleaner shown in figure 2. The second filter stage 7 can be removed from the separation vessel 3 in the direction of the arrow, while the third filter stage 8 can be removed from the drive system vessel 2 in the direction of the arrow. Thus, the second filter stage 7 and the third filter stage 8 may be removed in opposite directions.

List of reference numerals

b width of

d filter stage diameter

Diameter of suction tube

h height

1 handle

2 drive system container

3 separation container

4 suction pipe

5 drive system

6 first Filter stage

7 second Filter stage

8 third Filter stage

9 fourth Filter stage

10 inner wall

11 extension pipe

12 drive system container outer housing

13 outer shell of separation container

14 inlet slot

15 drive system housing

16 opening

17 dip tube