Suction device with a channel member

Abstract

The present invention relates to a suction device, which includes a suction unit device (50) for generating a suction flow. The suction unit device (50) has a blower (60) with a blower motor (62), a blower bracket (72) for holding the blower (60) and / or the blower motor (62), and a guiding device (70) for process air. The guiding device (70) for process air has a channel member (80), the channel member has at least one channel (82) connected to the blower (60) on the exhaust side. The channel member (80) is placed on the blower bracket (72), and the channel member (80) is placed on the blower (60) or the blower motor (62).

Description

Technical Field

[0001] The present invention relates to a suction device, which includes a suction unit device for generating a suction flow. Among them, the suction unit device has a blower with a blower motor, a blower bracket for holding the blower and / or the blower motor, and a guiding device for process air. Background Art

[0002] US 2014 / 0026355 A1 discloses a wet and dry suction machine.

[0003] US 8,297,949 B1 discloses a suction machine.

[0004] WO 2013 / 139833 A1 discloses a suction unit for a suction machine.

[0005] CH 440 589 discloses a vacuum cleaner with a spiral housing, which has a rear end wall inclined relative to the longitudinal central axis, and the cross-section of the spiral housing increases towards the socket.

[0006] US 2007 / 0151072 A1 discloses a vacuum cleaner with an exhaust gas flow path.

[0007] DE 20 2018 105 372 U1 discloses a device for slot suction of the exhaust gas generated on a stove.

[0008] JP H10-252696 discloses a centrifugal compressor.

[0009] US 2009 / 0095360 A1 discloses a vacuum cleaner with multiple exhaust output positions. Summary of the Invention

[0010] The object of the present invention is to provide a suction device of the type mentioned at the beginning, which can be manufactured in a simple manner and / or has an optimized fluid sealing structure.

[0011] According to the present invention, in the suction device mentioned at the beginning, this object is solved in such a way that the guiding device for process air has a channel member, the channel member has at least one channel connected to the blower on the exhaust side, the channel member is placed on the blower bracket, and the channel member is placed on the blower or the blower motor.

[0012] The channel element can be constructed multifunctionally: It first forms a channel for guiding the process air coming from the blower. Since the channel element is mounted both on the blower support and on the blower or the blower motor, the channel can be constructed as a sealing device that hermetically seals the blower or the blower motor relative to the blower support in a fluid-tight manner. In addition, a liquid-tight seal towards the blower motor can be achieved in a simple manner. Furthermore, a sealing device can be integrated into the channel element that seals the cooling air guiding device for the blower motor.

[0013] In addition, via the channel device, a floating support for, in particular, the blower motor or the blower can be achieved. Thereby, for example, vibration decoupling can be achieved and noise reduction can be minimized.

[0014] Optimized low-resistance air guiding is achieved via the channel element, so that an energy-saving suction operation can be realized.

[0015] The channel element enables the suction device to be manufactured in a simple manner. During manufacturing, the channel element can be positioned relative to the blower in a simple manner, and the number of required components can be kept low due to its multifunctional construction.

[0016] Advantageously, the channel element is formed in one piece, and / or the channel element is integrally formed, and / or the channel element is at least an integrally processable unit during the manufacture of the suction device, and / or the channel element is made of an elastic material that has a fluid-sealing function and / or enables a floating support. Thereby, the number of required components is kept low.

[0017] In one embodiment, the channel element has a first opening and a second opening, wherein the second opening is axially spaced from the first opening. Thereby, the channel element can be simply slipped over the blower / blower motor. It can be positioned relative to the blower in a simple manner. It can simply achieve a sealing function. Here, it is possible, for example, to achieve the sealing function on a circular surface. Thereby, simple manufacturability is obtained.

[0018] In particular, at least one of the following features is provided:

[0019] - The first opening and the second opening are oriented parallel to each other;

[0020] - The first opening and / or the second opening are oriented transversely, in particular perpendicularly, to the axial direction;

[0021] - The first opening and / or the second opening are surrounded by a closed wall;

[0022] - The first opening and / or the second opening have a circular cross-section;

[0023] - The blower motor is positioned in the second opening;

[0024] - The blower motor is positioned in at least a partial region of the first opening.

[0025] Thus, simple manufacturability of the channel member is achieved. In addition, the suction device can be manufactured in a simple manner when manufacturing the suction device.

[0026] In particular, it is provided that the blower motor is floatingly supported on the blower bracket via the channel member, and / or the channel member forms a sealing device for sealing the blower motor, in particular relative to the blower bracket and / or relative to the cooling air guiding device for the blower motor. Thereby, a multifunctional structure is obtained. For example, floating support of the blower motor can be achieved by a single channel member, and sealing, in particular relative to the blower bracket and the cooling air guiding device, can be achieved.

[0027] In one embodiment, the channel member has a first partial region that is supported on the blower bracket, and wherein the blower motor is supported on the first partial region, and wherein, in particular, the first partial region is positioned between the blower motor and the blower bracket with respect to the axial direction. Thereby, fluid sealing between the blower bracket and the blower motor can be achieved. In addition, floating support of the blower motor or the blower bracket can still be achieved thereby.

[0028] Then, advantageously, the first partial region surrounds the first opening of the channel member, and in particular, the first partial region forms a wall that encloses the first opening in a closed manner. The corresponding channel member can be manufactured in a simple manner. In addition, the corresponding suction device can be manufactured in a simple manner.

[0029] For the same reason, it is advantageous that the first opening has a first region that forms an input side interface for process gas of the air guiding device for process air at the blower, or at least partially accommodates the input side interface. Thereby, simple connection between the blower and the air guiding device can be achieved via the channel member.

[0030] In addition, it is advantageous that the first opening has a second region on which the blower motor is positioned. Thereby, simple and optimized positioning between the blower motor and the channel member can be achieved.

[0031] In particular, then at least one of the following features is provided:

[0032] - The second region follows the first region in the axial direction;

[0033] - The second region has a larger cross-sectional area and in particular a larger diameter than the first region;

[0034] - The first partial region of the channel element has a first abutment surface for the blower motor on the second region of the first opening, and the first abutment surface is used for axially supporting the blower motor;

[0035] - The first partial region has a second abutment surface for the blower motor on the second region of the first opening, and the second abutment surface is used for radially supporting the blower motor;

[0036] - The first abutment surface and / or the second abutment surface are formed annularly, in particular circularly;

[0037] - The first abutment surface and the second abutment surface continuously transition into each other.

[0038] Thereby, a multi-functional channel element can be provided. The connection between the blower and the air guiding device is realized via the channel element. The fluid-tight and floating support of the blower / blower motor can be realized via the channel element relative to the blower bracket.

[0039] Preferably, a cooling air guiding device for the blower motor is provided, wherein the channel element forms a sealing device for the cooling air guiding device. Thus, in addition to the channel element, there is no need to provide a separate fluid-tight sealing device for the cooling air guiding device.

[0040] In one embodiment, a cover is arranged on the blower motor, and at least one channel for guiding the cooling air of the blower motor is arranged or formed between the cover and the blower motor. Thereby, the cooling air guiding device can be realized in a simple manner.

[0041] In particular, at least one of the following features is provided:

[0042] - The channel element is configured as a sealing device for achieving fluid sealing between the cover and the blower motor;

[0043] - The channel element includes a second partial region, which is arranged between the wall of the cover and the wall of the blower motor and forms a fluid seal;

[0044] - The channel element is configured to floatingly support the cover on the blower motor.

[0045] Thereby, a multi-functional channel element can be provided, and the multi-functional channel element also ensures the fluid sealing of the cooling air guiding device.

[0046] In particular, at least one of the following features is provided:

[0047] - The second partial region is axially spaced from the first partial region of the channel element that ensures the fluid sealing and / or support of the blower motor on the blower bracket;

[0048] - At least one passage of the passage member is formed between the first partial region and the second partial region;

[0049] - The second partial region is configured as a protruding tab that is sunk into a groove on the blower motor;

[0050] - The tab extends at least approximately in the axial direction;

[0051] - The tab is annular and is especially configured circularly;

[0052] - The second partial region surrounds the second opening of the passage member;

[0053] - A partial region of the cover is positioned in the second opening.

[0054] Thus, a multifunctional passage member can be provided and fluid tightness with respect to the cooling air guiding device can be achieved in a simple manner.

[0055] In particular, it is provided that the passage member has a third partial region that forms the wall of at least one passage. Thereby, the air guiding function of the passage member can be achieved in a simple manner.

[0056] In particular, the third partial region is arranged between the first partial region of the passage member and the second partial region of the passage member, wherein the first partial region ensures fluid sealing and / or support on the blower bracket, while the second partial region ensures fluid sealing and / or support on the cover. Thus, a multifunctional passage member can be achieved in a simple manner.

[0057] Advantageously, the blower motor forms the additional wall of at least one passage of the passage member. Thereby, at least one passage can be closed via the blower motor and especially the housing of the blower motor. Thereby, the number of parts can be kept small and simple assembly can be obtained. In particular, for example, the passage member can be simply slipped over the blower / blower motor.

[0058] In one embodiment, a receiving portion is formed on the inner side of the passage member between the second partial region and the third partial region, which is especially an annular receiving portion. Thereby, the corresponding mating element of the blower / blower motor can be positioned on the receiving portion to achieve reliable fixation of the passage member.

[0059] In particular, receiving portions such as grooves or shoulders are formed on the inner side of the passage member, and the wall of the blower motor is arranged on the receiving portion. Thereby, reliable fixation between the passage member and the blower motor or the blower can be achieved.

[0060] Advantageously, a blower motor receiving part is provided, on which at least one receiving part for the channel element is formed. Thereby, axial and radial fixation of the blower / blower motor on the suction head of the suction device can be achieved in a simple manner. For example, it is also possible thereby to clamp the blower or the blower motor in the suction head, whereupon the number of screw elements for fixing the blower / blower motor to the blower bracket can then be kept low or even no screws are required.

[0061] In one embodiment, a first receiving part for the tab of the channel element is provided, which has at least one of the following features:

[0062] - At least one tab is arranged on the upper side of the channel element, which upper side is in particular facing away from the blower bracket;

[0063] - At least one tab is arranged on the second partial area of the channel element that ensures sealing against the cover;

[0064] - At least one tab extends in the axial direction;

[0065] - When at least one tab sinks into the receiving part, radial mobility of the channel element relative to the blower motor is prevented.

[0066] Thereby, further fixation of the combination of the channel element and the blower / blower motor can be achieved and in particular rotation can be prevented.

[0067] For the same reason, it is advantageous to provide a second receiving part, which has a shoulder and has at least one of the following features:

[0068] - The through element has a shoulder for matching with the second receiving part;

[0069] - The shoulder of the channel element is formed on the first partial area that ensures sealing and / or support on the blower bracket;

[0070] - The second receiving part prevents radial mobility and / or axial mobility of the blower motor or the blower.

[0071] Thereby, the blower / blower motor can be fixed to the suction device in a simple manner.

[0072] In particular, a third receiving part is provided, which prevents radial mobility and in particular also ensures squeezing of the channel element in the radial direction. Thereby, an axial sealing device with radial squeezing can be achieved via the channel element.

[0073] More particularly advantageously, the channel element forms a first axial sealing device and a second axial sealing device spaced apart from the first sealing device, and at least one of the sealing devices is radially compressed therein. The first axial sealing device is particularly used to achieve fluid tightness between the blower support and the blower / blower motor. The second axial sealing device is particularly used to seal the cooling air guiding device for the blower motor. Thereby, the channel element is made multifunctional.

[0074] In one embodiment, the channel element has at least one tongue, and a mating element for the at least one tongue is assigned to the blower support, wherein when the tongue is fixed to the mating element, rotational movement of the channel element relative to the blower support is prevented. Thereby, the suction device can be manufactured in a simple manner. In addition, an exact attitude is thereby predefined for the channel element during manufacture of the suction device.

[0075] In a structurally simple embodiment, it has at least one tongue, and the mating element is a pin for passing through an opening. Thereby, the channel element can be positioned relative to the blower support in a simple manner during manufacture of the suction device.

[0076] Advantageously, the blower motor / blower is axially clamped. Thereby, a simple and space-saving structural configuration of the suction device is obtained.

[0077] At least one channel of the channel element has an output end that directly leads into an outlet for discharging process air exhaust to the surroundings of the suction device via a pipe element. Thereby, an optimized and in particular low-resistance flow path for the process air exhaust is obtained.

[0078] Advantageously, the output end of at least one channel has a circular cross-section. Thereby, low-resistance air guiding is obtained.

[0079] Advantageously, at least one channel extends around the blower motor. Thereby, an optimized flow guidance for the process air is obtained.

[0080] In particular, at least one channel has a trajectory that extends around an axis parallel or coaxial to the motor axis. The extension around the axis here means that the trajectory can be mathematically represented in polar coordinates having the motor axis as the pole and the corresponding polar angle.

[0081] In particular, here, at least one channel has a helical trajectory, that is, at least one channel is configured as a volute. Thereby, an optimized flow guidance is obtained.

[0082] In one embodiment, a suction head and a suction container are provided, wherein the suction head is detachably arranged on the suction container. Thereby, the suction container can be cleaned and emptied in a simple manner when the suction head is removed.

[0083] In particular, here, the blower motor (and the blower) are arranged on the suction head.

[0084] In one embodiment, the suction device has a vertical axis, wherein the motor axis is oriented at an acute angle to the vertical axis. This results in an optimized use of space.

[0085] The suction device can be configured as an independent device and in particular as a wet and dry suction device. The liquid tightness of the blower motor can also be achieved by means of a multi-functional channel element. In principle, it is also possible for the suction device to be integrated into a vehicle, for example. Description of the Drawings

[0086] The following description of the preferred embodiments serves to explain the present invention in detail in conjunction with the drawings. Among them:

[0087] Figure 1 Shows a schematic cross-sectional view of an embodiment of a suction device according to the present invention;

[0088] Figure 2 Shows a cross-sectional view along line 2-2 according to Figure 1 ;

[0089] Figure 3 Shows an enlarged view of area A according to Figure 1 ;

[0090] Figure 4 Shows a cross-sectional view along line 4-4 according to Figure 3 ;

[0091] Figure 5 Shows a cross-sectional view along line 5-5 according to Figure 3 ;

[0092] Figure 6 Shows a cross-sectional view along line 6-6 according to Figure 3 ;

[0093] Figure 7 Shows a cross-sectional view along line 7-7 according to Figure 3 ;

[0094] Figure 8 Shows an enlarged view of area B according to Figure 3 ;

[0095] Figure 9 Shows an enlarged view of area C according to Figure 3 ;

[0096] Figure 10 Shows a top view of an embodiment of the channel element;

[0097] Figure 11 Shows a cross-sectional view along line according to Figure 10Cross-sectional view of line 11-11;

[0098] Figure 12 Showing according to Figure 10 Perspective view of the channel member;

[0099] Figure 13 Showing according to Figure 1 Another cross-sectional view of the aspirator;

[0100] Figure 14 Showing according to Figure 13 Enlarged view of area D;

[0101] Figure 15 Showing a cross-sectional view along line 15-15 according to Figure 13 ;

[0102] Figure 16 Showing according to Figure 15 Enlarged view of area E;

[0103] Figure 17 Showing a diagram similar to the diagram in Figure 16 in a variant; and

[0104] Figure 18 Schematically showing a measuring device for determining the liquid level. Detailed Description

[0105] An embodiment of the aspirator according to the invention, shown in the figures and labeled 20, is configured as an independent suction machine. The aspirator 20 is in particular configured as a wet and dry suction machine capable of sucking in liquids and dust.

[0106] The aspirator 20 includes a suction container 22. The suction container 22 has a bottom 24 and a wall 26. The wall 26 and the bottom 24 define an internal space 28. The internal space 28 can accommodate the suction material. It is also possible that a suction bag (for dry suction operation) is positioned in the internal space 28.

[0107] In one embodiment, the suction container 22 is further configured to be movable in the aspirator 20. A wheel device 30 is arranged on the suction container 22. The wheel axis 32 is oriented transversely to the drawing plane in Figure 1 .

[0108] Spaced apart from the wheel device 30, a steerable roller 34 or a plurality of steerable rollers 34 are positioned on the suction container 22.

[0109] A suction head 36 is placed on the suction container 22. The suction head 36 can be removed from the suction container 22 in order to enable access to the internal space 28, in particular in order to be able to empty and clean the internal space 28.

[0110] A fixing device 38 is provided, via which the suction head 36 can be fixed to the suction container 22.

[0111] The suction device 20 has a vertical axis 40 extending from the suction container 22 to the suction head 36. The vertical axis 40 is transverse to and in particular perpendicular to the wheel axis 32.

[0112] When the suction device 20 is placed on a flat floor 42, the vertical axis is perpendicular to the floor 42.

[0113] A suction interface 44 is assigned to the suction container 22. In one embodiment, the suction interface 44 is located on the suction head 36.

[0114] A suction hose 46 can be coupled to the suction interface 44.

[0115] An in particular curved pipe element 46 is guided from the suction interface 44 into the interior space 28. The pipe element 46 has a socket 48 that projects into the interior space 28.

[0116] It is also possible for the suction interface 44 to be arranged directly on the suction container 22.

[0117] When using a suction bag, the corresponding opening joint of the suction bag can be pushed onto the socket 48.

[0118] The suction device 20 includes a suction unit device 50 for generating a suction flow. The suction flow loads the interior space 28 of the suction container 22. Suction can be achieved via the suction flow. The suction flow is applied to the suction interface 44. In Figure 1 the suction flow is represented by a double arrow.

[0119] The suction device 20 has a filtering device 52. The filtering device 52 is arranged on the suction head 36 in a removable manner, for example.

[0120] The filtering device 52 has a clean side 54 and a dirty side 56. The dirty side 56 faces the interior space 28 of the suction container 22.

[0121] The suction flow flows through the filter device 52, and the suction flow is cleaned by the filter device 52. Starting from the clean side 54 of the filtering device 52, the suction flow is not contaminated.

[0122] A cleaning device 58 for the filtering device 52 is arranged on the suction head 36. The filtering device 52 is cleaned by this cleaning device. For example, the impact air generated by the cleaning device 58 causes the dirt particles attached to the filtering device 52 to fall into the interior space 28 of the suction container 22.

[0123] The suction unit 50 includes a blower 60 having a blower motor 62. The blower 60 has an impeller 64 that is driven to rotate by the blower motor 62.

[0124] The blower motor 62 has a motor axis 66 that is coaxial with the rotational axis of the impeller 64.

[0125] In one embodiment, the motor axis 66 forms an acute angle 68 with the vertical axis 40.

[0126] In one example, the acute angle 68 is approximately 65°.

[0127] In principle, it is also possible that the motor axis 66 is oriented, for example, parallel to the vertical axis 40.

[0128] The suction device 20 has a guiding device 70 for process air, which is generally labeled with 70. The guiding device 70 for process air is arranged on the suction head 36. The process air is guided on the suction head 36 via the guiding device and discharged as process air exhaust. The guided process air here is the air cleaned by the filtering device 52. In the case of wet operation of the suction device 20, the process gas can in principle be loaded with liquid.

[0129] A blower bracket 72 is arranged on the suction head 36. The blower bracket 72 forms a base plate for fixing the blower motor 62.

[0130] In one embodiment, the blower motor 62 is integrated into the blower 60; the blower motor 62 and the blower 60 particularly have a common housing 74, in which motor elements such as a stator and a rotor are arranged, and the impeller 64 is arranged in the housing.

[0131] In this sense, the blower bracket 72 then holds the blower 60 having the blower motor 62.

[0132] A receiving portion 76 for the blower 60 / blower motor 62 is arranged or formed on the suction head 36.

[0133] The guiding device 70 for process air has one or more channels 78 that lead from the clean side 54 of the filtering device 52 to the blower 60.

[0134] A channel member 80 is provided on the blower bracket 72 and the blower 60 / blower motor 62. The channel piece 80 has a channel 82 that is connected to the blower on the exhaust side. The process air exhaust can be discharged to the surroundings of the suction device 20 via this channel 82. In addition, the channel member 80 is arranged and configured such that it is positioned on the input side relative to the blower 60. This will be explained in more detail below.

[0135] The channel member 80 is formed integrally or in one piece. In particular, it is constructed such that it is a unit that can be handled integrally during the manufacture of the aspirator 20 and can in particular be integrally fixed to the suction head 36. The task of the channel member 80 is to provide a channel 82 for the guiding device 70 of the process air for discharging the exhaust gas. The channel member 80 also has a sealing function and a supporting function. Accordingly, a material is selected for the channel member 80. In particular, the channel member is made of a single material.

[0136] In one embodiment, the channel member is made of a vulcanized rubber material such as EPDM (ethylene-propylene-diene rubber).

[0137] In a further embodiment, the channel member 80 is made of a thermoplastic elastomer (TPE).

[0138] The channel member 80 is arranged on the blower bracket 72. In addition, it is arranged on the blower 60 / blower motor 62. In addition, a cover 84 assigned to the blower motor 62 is arranged on the channel member 80.

[0139] The channel member 80 has a track region 86 on which a channel 82 is formed. The track region 86 has a wall 88 that defines the channel 82 from the blower 60 / blower motor 62 to the outside. The channel member 80 is open opposite the wall 88. Another wall 90 for closing the channel 82 is formed by the blower 60 / blower motor 60 and is formed here by the housing 74.

[0140] The track region 86 has a track path that has a path around an axis and is coaxial with the motor axis 66. It should be understood that the corresponding track path of the track region 86 can be represented by polar coordinates, where the motor axis 66 forms the pole. The corresponding track path is represented by the distance from the pole (motor axis 66) and the polar angle.

[0141] For example, the track path in the track region 86 is circular.

[0142] In one embodiment (for example, see Figure 6 ), for example, the track path of the wall 88 is spiral. The spiral on which it is based is, for example, an Archimedean spiral or a logarithmic spiral. The track region 86 is then particularly configured as a volute.

[0143] In particular, it is provided that the diameter 92 of the channel 82 (see Figure 6 ) continuously increases towards the output end 94 of the channel member 80.

[0144] In particular, the channel 82 is circular in cross-section, and the output end 94 has a circular cross-section (for example, also see Figure 12 ).

[0145] The channel member 80 (see Figures 10 to 12 ) has a first opening 96 and a second opening 100 spaced apart in the axial direction 98. The axial direction 98 is coaxial with the motor axis 66.

[0146] The first opening 96 and the second opening 100 are parallel to each other. They are oriented transversely and in particular perpendicularly to the axial direction 98.

[0147] The first opening 96 and the second opening 100 are each bounded outwardly by the wall 88 of the member. The channel member 80 is open inwardly. This results in an easier connection to the blower 60.

[0148] The channel member 80 has a first partial region 102. The first partial region 102 surrounds the first opening 96 and forms the wall of the member for the first opening 96.

[0149] The channel member 80 also has a second partial region 104. The second partial region 104 surrounds the second opening 100 and forms the wall of the member for the second opening 100.

[0150] Arranged between the first partial region 102 and the second partial region 104 is a third partial region 106 of the channel member 80. This third partial region 106 forms the wall 88 as the outer wall of the channel 82.

[0151] The first partial region 102 is supported on the blower support 72 on a first side 108 (for example see Figure 8 、 9 ). The blower 60 / blower motor 62 is supported on a second side 110 of the first partial region 102 opposite the first side 108. Thereby, the first partial region 102 is positioned between the blower 60 / blower motor 62 and the blower support 72.

[0152] The channel member 80 forms a first sealing device via the first partial region 102. This first sealing device seals the blower motor 62 / blower 60 towards the channel 82.

[0153] The first opening 96 formed by the first partial region 102 is configured as an interface or houses an interface, via which the channel 82 is connected to the blower 60 on the input side with respect to the process air.

[0154] The first partial region 102 of the channel member 80 also ensures that the blower 60 / blower motor 62 is floatingly supported on the blower support 72.

[0155] The first opening 96 has a first region 112 here, which ensures the connection of the channel 82 to the blower 60.

[0156] The first opening 96 further has a second region 114 on which there is a second side 110, and the second region is joined to the first region 112 in the axial direction 98.

[0157] The second region 114 has a diameter that is greater here than the diameter of the first region 112.

[0158] A support surface 116 is formed on the second side 110, on which the blower 60 / blower motor 62 is supported. The support surface 116 has a first abutment surface 118 and a second surface 120 here. The first abutment surface 118 serves to axially support the blower 60 / blower motor 62 relative to the axial direction 98. The second abutment surface 120 also serves to provide radial support in a radial direction transverse to the axial direction 98. The first abutment surface 118 and the second abutment surface 120 transition continuously into each other. The respective support surface formed by the first abutment surface 118 and the second abutment surface 120 is annular here.

[0159] The blower 60 / blower motor 62 is positioned and held in the second region 114.

[0160] The blower 60 / blower motor 62 and the cover 84 are positioned in the first opening 96 here.

[0161] The first partial region 102 has a shoulder 122 on its outer side.

[0162] The receiving portion 76 in the suction head 36 has a mating shoulder 124 that matches the shoulder 22, against which the shoulder 122 of the channel member 80 abuts.

[0163] This prevents axial and radial movability of the channel member 80 relative to the suction head 36.

[0164] The mating shoulder 124 forms a second receiving portion on the suction head 36 for the channel member 80.

[0165] The second partial region 104 has a first tab 126 that extends substantially parallel to the axial direction 98 and points in the direction of the second partial region 104 here.

[0166] The housing 74 has a groove 128. The first tab 126 sinks into the annular groove 128.

[0167] On the inner side 129 of the channel member 80, a receiving portion 130, which is for example a groove, is formed on the channel member 80. The receiving portion 130 is formed here between the first partial region 102 and the third partial region 106.

[0168] In the receiving part 130, a wall region 132 of the housing 74 of the blower 60 / blower motor 62 is sunk, wherein the wall region 132 defines the groove 128.

[0169] A wall region 134 of the cover 84 is also sunk into the groove 128, wherein the first tab 126 is located between the wall region 134 of the cover 84 and the wall region 132 of the blower 60 / blower motor 62.

[0170] The first tab 126 and in particular the second partial region 104 form a fluid seal between the cover 84 and the blower 60 / blower motor 62.

[0171] It is also possible that the cover 84 is floatingly supported on the blower 60 / blower motor 62 via the second partial region 104 of the channel member 80.

[0172] Via the second partial region 104, a second axial sealing device is formed by the channel member 80, and the second axial sealing device ensures an airtight seal between the cover 84 and the housing 74.

[0173] The cover 84 is configured in a dome shape. In particular, it has an opening 136 coaxially with the motor axis 66 (see Figure 4 ).

[0174] A fan wheel 140 assigned to the opening 136 is arranged on the shaft 138 of the blower motor 62. The fan wheel 140 is in particular spaced apart from the impeller 64. When the shaft 138 rotates, the fan wheel 140 rotates about the same rotation axis as the impeller 64, that is, about an axis coaxial with the motor axis 66. Thereby, cooling air can be sucked through the opening 136.

[0175] The opening 136 is correspondingly connected to an interface on the suction head 36, and cooling air can be inhaled via this interface.

[0176] The cover 84 surrounds a partial region of the blower motor 62. One or more channels 142 for the air cooling device of the blower motor 62 are formed between the cover and this partial region.

[0177] The cooling air sucked through the opening 136 can flow in one or more channels 142 and thereby flow around the corresponding housing region 144 of the blower motor 62.

[0178] An output end 146 is arranged on the cover 84, and a pipe 148 is connected to the output end and leads to an interface for cooling air on the suction head 36 (see Figure 2 ; the guiding of the cooling air is illustrated by a dashed double arrow in Figure 2 ).

[0179] On the second part region 104, there is also arranged a second tab 152 or a plurality of second tabs 152 (see Figure 8 , 10 , 12).

[0180] These tabs are placed on the upper side of the channel member 80 and point away from the second part region 104 upwards.

[0181] In particular, one or more second tabs 152 are oriented at least approximately parallel to the axial direction 98.

[0182] A first receiving part 154 is assigned to the receiving part 76 on the suction head 36 (see Figure 8 ). One or more second tabs 152 sink at least partially into the first receiving part.

[0183] On the second part region 104 of the channel member 80, one or more tongues 156 are arranged (see Figure 10 ). The corresponding tongues 156 have openings 158 (see Figure 7 ). On the suction head, a mating element 160 assigned to the blower bracket 72 is arranged. The mating element is in particular configured as a pin element that sinks into the opening 158.

[0184] In one embodiment, two tongues 156 and two corresponding mating elements 160 are provided.

[0185] When manufacturing the suction device 20, the channel member 80 can be positioned relative to the blower bracket 72 against relative rotation on the corresponding mating element 160 by fixing the tongues 156 and thus correctly oriented.

[0186] The pipe element 162 leads from the output end 94 of the channel member 80 to an outlet on the suction head 36 (see Figure 6 ), and process air exhaust can be discharged to the surroundings of the suction device 20 via this pipe element.

[0187] It is also possible that the output end 94 of the channel member 80 leads directly into the outlet.

[0188] The channel member 80 is a multifunctional component, which is realized in particular as an integral component:

[0189] It forms the channel 82 through which process air exhaust can be led out from the blower 60.

[0190] Via the first opening 96 of the channel member 80, at least partially an interface of the blower 60 on the channel 82 is formed.

[0191] The channel member 80 forms a first sealing device via the first partial region 102, through which the blower 60 / blower motor 62 is sealed in a fluid-tight manner relative to the blower support 72. In addition, the channel member 80 ensures that no suction flow with entrained liquid can reach the blower motor 62.

[0192] In addition, the blower 60 / blower motor 62 is supported in a floating manner via the first partial region 102 of the channel member 80. Thereby, vibration decoupling can be achieved to a certain extent, and noise formation is reduced.

[0193] The first sealing device is in particular an axial sealing device.

[0194] In addition, the channel member 80 forms a second sealing device via the second partial region 104, through which the cover 84 is supported in a fluid-tight manner on the blower 60 / blower motor 62. Thereby, a fluid-tight seal of the cooling air guiding device for cooling the blower motor 62 is achieved.

[0195] In addition, a certain vibration decoupling of the cover 84 can be achieved.

[0196] The channel member 80 is in particular positioned in the receiving portion 76 by radial pressing.

[0197] The blower 60 / blower motor 62 is in particular axially clamped. Corresponding holding portions 162 are provided, which ensure this axial clamping. The blower motor 62 / blower 60 can thereby be fixed in the suction head 36 in a simple manner. The suction device 20 can be manufactured in a simple manner. Thereby, a space-saving arrangement with a high degree of fluid tightness is obtained.

[0198] The channel member 80 is slipped over the blower 60 having the blower motor 62.

[0199] Effective flow guidance with low flow resistance can also be achieved via the channel member 80. Thereby, a high operating efficiency of the suction device 20 is obtained.

[0200] The suction device 20 can be manufactured in a simple and inexpensive manner. Due to the multifunctional construction of the channel member 80, the number of components can be minimized.

[0201] The suction device 20 includes a measuring device 164 for detecting the liquid level 166 in the suction container 22 (in particular see Figures 13 to 18) In particular, the measuring device 164 is configured as a threshold device that checks whether a specific threshold of the liquid level 166 is reached; during the wet suction operation of the suction device 20, the liquid is sucked in and accommodated in the suction container 22. Here, it should be prevented that the suction device 20 is "filled". By knowing the liquid level 166 and especially the threshold value, for example, the suction operation can be shut off in a timely manner via the measuring device 164.

[0202] The measuring device 164 includes a probe device 168. The probe device 168 has a first bending elastic element 170 and a second bending elastic element 172. The first bending elastic element 170 and the second bending elastic element 172 are spaced apart from each other in a transverse direction 174, which is especially parallel to the wheel axis 32.

[0203] In one embodiment, the probe device 168 is arranged on the suction head 36.

[0204] In principle, it is also possible that the probe device 168 is arranged on the suction container 22, or arranged with a first part on the suction head 36 and a second part on the suction container 22.

[0205] The advantage of arranging the probe device 168 entirely on the suction head 36 is that the electrical components of the measuring device 164 arranged in the suction head 36 can be in fixed electrical contact with the probe device 168. When the probe device 168 is arranged on the suction container 22, it must be ensured that the corresponding electrical contact is made when the suction head 36 is placed on the suction container 22.

[0206] When the suction head 36 is placed on the suction container 22, the first bending elastic element 170 and the second bending elastic element 172 extend into the inner space 28 of the suction container 22 in the operating position.

[0207] In one embodiment (especially Figure 15 and 16 ), the first bending elastic element 170 and the second bending elastic element 172 are each configured as a wire element 176. It is in the form of a metal wire, rope or filament and is made of an electrically conductive material.

[0208] The first bending elastic element 170 and the second bending elastic element 172 are each held on the bracket 182 of the suction head 36 via a first fixing position 178 and a second fixing position 180.

[0209] The respective bending elastic elements 170, 172 are freely suspended between the first fixing position 178 and the second fixing position 180.

[0210] The first fixing position 178 and the second fixing position 180 are at the same height relative to the vertical axis 40, wherein the fixing positions 178, 180 for the two bending elastic elements 170, 172 are at the same height.

[0211] The first bending elastic element 170 and the second bending elastic element 172 have an arc shape between their respective first fixing positions 178 and second fixing positions 180.

[0212] The first fixing position 178 is located in the region of the first end 184 of the respective bending elastic element 170, 172. The second fixing position 180 is located in the region of the second end 186.

[0213] In one embodiment, the respective bending elastic element 170 is fixed to the bracket 162 in such a way that pin elements 188 are arranged in the regions of its ends 184, 186, and the pin elements are fixed to the bracket 162 and, for example, pressed in there. For example, the pin element 188 is extruded or glued with the wire element 176.

[0214] In the initial position (see, for example, Figure 13 , 16 ), the first bending elastic element 170 and the second bending elastic element 172 have an extension on the vertical axis 40 such that they have a point or region 190 with a minimum distance from the bottom 24 of the suction container 22. In the case where the bending elastic elements 170, 172 are arcuately configured, this region 190 is in particular the apex.

[0215] When the liquid level 166 reaches the region 190, a corresponding threshold is reached. Thus, the region 190 defines the threshold for the level detection of the measuring device 164.

[0216] The region 190 is in particular at the same height on the vertical axis 40 for the first bending elastic element 170 and the second bending elastic element 172. (Due to Figure 13 the inclined cross-section, the regions 190 of the bending elastic elements 170, 172 are offset there.)

[0217] The first fixing position 178 and the second fixing position 180 are spaced apart from each other by a distance 194 in the direction 192. The direction 192 is here transverse to the transverse direction 174 and transverse to the vertical axis 40.

[0218] In one embodiment, the direction 192 is the longitudinal direction of the suction device 20. In particular, in one embodiment, the suction device 20 has a larger dimension in the direction 192 than in the transverse direction 174.

[0219] The spacing 194 is in particular at least 2 cm, preferably at least 4 cm, preferably at least 6 cm, preferably at least 8 cm and particularly preferably at least 10 cm.

[0220] Preferably, the spacing 194 is at least 12 cm or at least 14 cm or at least 16 cm.

[0221] In principle, the spacing 194 can be selected such that the flexurally elastic elements 170, 172 for suspension retention can still extend into the interior space 28 of the suction container 22.

[0222] In Figure 1 and 15 Variant 196 is shown, in which the flexurally elastic element has a greater length, that is to say the spacing 194 is greater than in the embodiment according to Figure 13 the embodiment.

[0223] The first flexurally elastic element 170 and the second flexurally elastic element 172 each have enveloping planes 198a, 198b which are parallel and spaced apart opposite one another. The line element 176 is located between these enveloping planes 198a, 198b.

[0224] The first flexurally elastic element 170 and the second flexurally elastic element 172 are designed to be non-flexible, such that they have a stable attitude, i.e. an initial attitude, without the influence of a force. They are arranged and constructed here in such a way that they can be deflected from this initial attitude. This is indicated in Figure 14 There. The initial attitudes 200 are shown for the first flexurally elastic elements 170 and 172 respectively. The deflection with respect to this initial attitude 200 is indicated by the double arrow 202.

[0225] The flexurally elastic elements 170, 172 are arranged and constructed here such that when deflected from the initial attitude 200 and when the corresponding deflecting force is removed, these flexurally elastic elements return to their initial attitude 200 by themselves. In particular, these flexurally elastic elements are elastically arranged and constructed such that they spring back into their initial attitude.

[0226] Thereby, the risk of damaging the probe device 168 is reduced. In addition, a kind of "automatic" cleaning of the flexurally elastic elements 170, 172 can be achieved by springing back.

[0227] When the liquid level 166 has reached the region 190, the flexurally elastic elements 170, 172 are substantially loaded with soiled liquid. Here, dirt may deposit on the flexurally elastic elements 170, 172.

[0228] When the bending elastic elements 170, 172 move out of the starting attitude 200 and snap back after the deflecting force is withdrawn via the elastic construction, the scale can be loosened from the bending elastic elements 170, 172 (from the wire element 176).

[0229] In one embodiment, the bending elastic elements 170, 172 are inclined at an acute angle 204 with respect to the vertical axis 40 in the starting attitude 200 (see Figure 13 ), wherein the spacing 206 between the first bending elastic element and the second bending elastic element 172 decreases towards the region 190.

[0230] In Figure 14 the illustrated arrangement, the spacing 206 decreases in the direction of the bottom 24 of the suction container 22.

[0231] The acute angle 204 is in particular related to the envelope planes 198a, 198b.

[0232] Thereby, when the suction head 36 with the probe device 168 is placed on the suction container 22, an insertion aid is achieved.

[0233] In particular, it can thereby be achieved that the first bending elastic element 170 and the second bending elastic element 172 can be positioned on the suction head 36 at a relatively large distance and in particular at the edge side in the transverse direction 174.

[0234] It is advantageously provided that the first bending elastic element 170 and the second bending elastic element 172 are arranged at the same spacing in the direction 192. The same spacing in the direction 192 is not absolutely necessary for the mode of operation.

[0235] The suction head 36 has a placement surface 208 on its lower side (which faces the bottom 24 of the suction container 22 when the suction head 36 is placed on the suction container 22) (see Figure 1 ), and the placement surface has a corresponding placement plane. When the suction head 36 is removed from the suction container 22, the suction head can be placed on the ground via the placement surface 208.

[0236] It is provided that the first bending elastic element 170 and the second bending elastic element 172 are located in the corresponding placement plane for the placement surface 208 or project beyond the placement plane in their starting attitude 200. (In principle, they can also be retracted relative to the placement plane.) In particular, when the bending elastic elements 170, 172 project beyond the placement plane in their starting attitude 200, they bend when the suction head 36 is placed on the ground accordingly. When the suction head 26 is then lifted, they quickly snap back into their starting attitude 200. Thereby, the described cleaning effect occurs.

[0237] By arranging the bending elastic elements 170, 172 at an acute angle 204 to the vertical axis 40, an inward bending occurs here, that is, the bending elastic elements 170, 172 bend towards each other.

[0238] In the variant Figure 15 indicated by reference numeral 210 in the figure, the corresponding bending elastic elements are fixed to the suction head 22 such that the corresponding fixing positions 212, 214 are not at the same height relative to the vertical axis 40. For example, the first fixing position 212 is in the region of the lower side of the suction head 36, while the second fixing position 214 is on the adapter sleeve 48.

[0239] In a variant of the embodiment ( Figure 17 ), the bending elastic element 170 is fixed to the bracket 216 of the suction head 36, wherein receiving portions 218 assigned to the first fixing position 178 and the second fixing position 180 are respectively arranged on the bracket, and the receiving portion 218 has a first part 220 in which a screw is positioned. The receiving portion has a second part through which the bending elastic element 170 passes.

[0240] The bending elastic element can be fixed in the second part 222 via the screw in the first part 220 and is especially clamped in this case.

[0241] The receiving portion 218 has an eight - shaped cross - section in terms of its opening.

[0242] The suction device 20 has a control device 224 ( Figure 18 ), which is especially arranged in the suction head 36. The blower motor 62 is driven and controlled via the control device. The control device 224 is connected to one or more switches.

[0243] The control device 224 drives and controls an optical and / or acoustic display 226.

[0244] The measuring device 164 includes an evaluation circuit 228. The evaluation circuit is implemented as an ASIC, for example.

[0245] For the measuring operation of the measuring device 164, the voltage Vcc_probe_enable is applied as a loading signal between the first bending elastic element 170 and the second bending elastic element 172 via the evaluation circuit 228. The dropped input voltage is measured as a response signal.

[0246] Between the first bending elastic element 170 and the second bending elastic element 172, there is a resistance R_probe due to the medium between them. When there is no liquid between the first bending elastic element 170 and the second bending elastic element 172, ideally, this resistance can be regarded as infinite.

[0247] When there is liquid between the first bending elastic element 170 and the second bending elastic element 172, current will flow, and in particular, a short-circuit current will occur. As a result, the resistance becomes finite and the input voltage of the voltage changes. This change is a measure that the liquid level 166 has reached the area 190. Thus, the threshold can be detected accordingly and the liquid level 166 can be determined at least "digitally".

[0248] The corresponding measurement signal is given by the evaluation circuit 228 and the control device 224. In one embodiment, the control device 224 then shuts off the suction operation by correspondingly loading the blower motor 62.

[0249] An alarm message can be given. For example, it is also possible that when the corresponding threshold is detected, the suction device 20 cannot be restarted for suction operation.

[0250] In particular, the signal Vcc probe_enable as the loading signal is emitted in a pulsed manner over time, so that the measurement does not occur continuously. The signal input voltage is the corresponding response signal and contains the liquid level 166 at least in digital form, that is, whether the threshold has been reached or not.

[0251] According to the present invention, a flexible probe device 168 is provided. The risk of breakage is greatly reduced by the bending elastic elements 170, 172. Due to the wire element 176, the probe device 168 occupies relatively little space in the suction container 22. The flexible structure contributes to the self-cleaning of the bending elastic elements 170, 172. Thus, the scale can be easily broken.

[0252] Even when the suction head 36 is placed on the placement surface 208, the self-cleaning effect can be carried out automatically.

[0253] The first bending elastic elements 170, 172 are each made of a conductive material. They are rope-shaped and have a certain inherent stiffness, and they can also be designed to be soft. They are made of, for example, wire material or a thread or fiber material having conductive fibers (such as carbon fibers).

[0254] In one embodiment, the bending elastic elements 170, 172 are arranged centrally on the suction device 20 with respect to the direction 192. In particular, they are arranged spaced apart from each other in the lateral direction 174. Thus, it is possible to determine in a simple and reliable manner whether the threshold of the liquid level has been reached.

[0255] Due to the bending elastic structure of the bending elastic elements 170, 172, it is possible to bounce back from the starting posture 200 to achieve the self-cleaning effect.

[0256] Due to the suspension at the spaced-apart fixed positions 178, 180, air can flow through the curved elastic elements 170, 172. The suction air flow is not obstructed.

[0257] The probe device 168 can be arranged such that an insertion aid for placing the suction head 36 on the suction container 22 is achieved due to the acute angle 204.

[0258] List of reference numerals

[0259] 20 Suction device

[0260] 22 Suction container

[0261] 24 Bottom

[0262] 26 Wall

[0263] 28 Interior space

[0264] 30 Wheel device

[0265] 32 Wheel axis

[0266] 34 Roller

[0267] 36 Suction head

[0268] 38 Fixing device

[0269] 40 Vertical axis

[0270] 42 Floor

[0271] 44 Suction connection

[0272] 46 Pipe element

[0273] 48 Sleeve

[0274] 50 Suction unit device

[0275] 52 Filter device

[0276] 54 Clean side

[0277] 56 Dirty side

[0278] 58 Purification device

[0279] 60 Blower

[0280] 62 Blower motor

[0281] 64 Impeller

[0282] 66 Motor axis

[0283] 68 Acute angle

[0284] 70 Guide device for process air

[0285] 72 Blower support

[0286] 74 Housing

[0287] 76 Receiving part

[0288] 78 Channel

[0289] 80 Channel part

[0290] 82 Channel

[0291] 84 Cover

[0292] 86 Trajectory area

[0293] 88 Wall

[0294] 90 Wall

[0295] 92 Diameter

[0296] 94 Output end

[0297] 96 First opening

[0298] 98 Axial direction

[0299] 100 Second opening

[0300] 102 First part area

[0301] 104 Second part area

[0302] 106 Third part area

[0303] 108 First side

[0304] 110 Second side

[0305] 112 First area

[0306] 114 Second area

[0307] 116 Support surface

[0308] 118 First support surface

[0309] 120 Second support surface

[0310] 122 Shoulder

[0311] 124 (Fitting) shoulder

[0312] 126 First tab

[0313] 128 Groove

[0314] 129 Inner side

[0315] 130 Receiving part

[0316] 132 Wall region

[0317] 134 Wall region

[0318] 136 Opening

[0319] 138 Axis

[0320] 140 Fan wheel

[0321] 142 Channel

[0322] 144 Housing region

[0323] 146 Output end

[0324] 148 Pipe

[0325] 150 Outlet

[0326] 152 Second tab

[0327] 154 First receiving part

[0328] 156 Tongue

[0329] 158 Opening

[0330] 160 Fitting element

[0331] 162 Holding part

[0332] 164 Measuring device

[0333] 166 Liquid level

[0334] 168 Probe device

[0335] 170 First bending elastic element

[0336] 172 Second bending elastic element

[0337] 174 Transverse direction

[0338] 176 Line element

[0339] 178 First fixed position

[0340] 180 Second fixed position

[0341] 182 Bracket

[0342] 184 First end

[0343] 186 Second end

[0344] 188 pin element

[0345] 190 area

[0346] 192 direction

[0347] 194 pitch

[0348] 196 variant

[0349] 198a envelope plane

[0350] 198b envelope plane

[0351] 200 starting attitude

[0352] 202 double arrow

[0353] 204 acute angle

[0354] 206 pitch

[0355] 208 placement surface

[0356] 210 variant

[0357] 212 first fixed position

[0358] 214 second fixed position

[0359] 216 bracket

[0360] 218 receiving part

[0361] 220 first part

[0362] 222 second part

[0363] 224 control device

[0364] 226 display

[0365] 228 evaluation circuit

Claims

1. A suction device, the suction device comprising a suction unit device (50) for generating a suction flow, wherein, The suction unit device (50) has a blower (60) with a blower motor (62), a blower bracket (72) for holding the blower (60) and / or the blower motor (62), and a guiding device (70) for process air, characterized in that the guiding device (70) for process air has a channel member (80) which has at least one channel (82) connected to the blower (60) on the exhaust side, the channel member (80) is located at the blower bracket (72), and the channel member (80) is located at the blower (60) or the blower motor (62), the channel member (80) forms a first axial sealing device and forms a second axial sealing device spaced apart from the first axial sealing device, and at least one of the sealing devices is radially compressed.

2. The suction device according to claim 1, characterized in that Has at least one of the following features: - The channel member (80) is integrally formed; - The channel member (80) is formed as one piece; - The channel member (80) is at least a unit that can be integrally processed when manufacturing the suction device; - The channel member (80) is made of an elastic material having a fluid sealing function and / or capable of achieving floating support.

3. The suction device according to claim 1 or 2, characterized in that, The channel member (80) has a first opening (96) and a second opening (100), wherein the second opening (100) is spaced apart from the first opening (96) in the axial direction (98).

4. The suction device according to claim 3, characterized in that Has at least one of the following features: - The first opening (96) and the second opening (100) are oriented parallel to each other; - The first opening (96) and / or the second opening (100) are oriented transversely to the axial direction; - The first opening (96) and / or the second opening (100) are surrounded by a closed wall; - The first opening (96) and / or the second opening (100) have a circular cross-section; - The blower motor (62) is positioned within the second opening (100); - The blower motor (62) is positioned in at least a partial region of the first opening (96).

5. The suction device according to any one of claims 1 - 2, characterized in that Has at least one of the following features: - The blower motor (62) is floatingly supported on the blower bracket (72) via the channel member (80); - The channel member (80) forms a sealing device for sealing the blower motor (62).

6. The suction device according to claim 5, characterized in that, The channel member (80) has a first partial region (102) which is supported on the blower bracket (72), and wherein the blower motor (62) is supported on the first partial region (102).

7. The suction device according to claim 6, characterized in that, The first partial region (102) surrounds the first opening (96) of the channel member (80).

8. The suction device according to claim 7, characterized in that, The first opening (96) has a first region (112) which forms or at least partially has an input side interface of the process air of the air guiding device (70) for process air at the blower (60).

9. The suction device according to claim 8, characterized in that, The first opening (96) has a second region (114) on which the blower motor (62) is positioned.

10. The suction device according to claim 9, characterized in that has at least one of the following features: - The second region (114) follows the first region (112) in the axial direction (98); - The second region (114) has a larger cross-sectional area than the first region (112); - A first partial region (102) of the channel member (80) has a first abutment surface (118) for the blower motor (62) on the second region (114) of the first opening (96), and the first abutment surface axially supports the blower motor (62); - The first partial region (102) has a second abutment surface (120) for the blower motor (62) on the second region (114) of the first opening (96), and the second abutment surface radially supports the blower motor (62); - The first abutment surface (118) and / or the second abutment surface (120) are formed annularly; - The first abutment surface (118) and the second abutment surface (120) transition continuously into each other.

11. The suction device according to any one of claims 1 - 2, characterized in thathas a cooling air guiding device for the blower motor (62), wherein the channel member (80) forms a sealing device for the cooling air guiding device.

12. The aspirator according to any one of claims 1-2, characterized in that, A cover (84) is arranged on the blower motor (62), and at least one channel for guiding cooling air for the blower motor (62) is arranged or formed between the cover (84) and the blower motor (62).

13. The aspirator according to claim 12, characterized in that has at least one of the following features: - The channel member (80) is configured as a sealing device for achieving fluid sealing between the cover (84) and the blower motor (62); - The channel member (80) includes a second partial region (104) that is arranged between the wall of the cover (84) and the wall of the blower motor (62) and forms a fluid seal; - The channel member (80) is configured to floatingly support the cover (84) on the blower motor (62).

14. The aspirator according to claim 13, characterized in that has at least one of the following features: - The second partial region (104) is axially spaced from the first partial region (102) of the channel member (80) that ensures the support and / or fluid sealing of the blower motor (62) on the blower support (72); - At least one channel (82) of the channel member (80) is formed between the first partial region (102) and the second partial region (104); - The second partial region (104) is configured as a protruding tab (126) that sinks into a groove (128) on the blower motor (62); - The tab (126) extends at least substantially in the axial direction (98); - The tab (126) is formed annularly; - The second partial region (104) surrounds a second opening (100) of the channel member (80); - A partial area of the cover (84) is positioned in the second opening (100).

15. The aspirator according to any one of claims 1-2, characterized in that, The channel member (80) has a third partial area (106) that forms the wall of the at least one channel (82).

16. The aspirator according to claim 15, characterized in that, The third partial area (106) is arranged between a first partial area (102) and a second partial area (104) of the channel member (80), wherein the first partial area (102) ensures support and / or fluid sealing on the blower bracket (72), and the second partial area (104) ensures fluid sealing and / or support of the cover (84).

17. The aspirator according to claim 15, characterized in that, The blower motor (62) forms another wall of the at least one channel (82) of the channel member (80).

18. The aspirator according to claim 16, characterized in that, A receiving portion (130) is formed on the inner side of the channel member (80) between the second partial area (104) and the third partial area (106).

19. The aspirator according to any one of claims 1-2, characterized in that, A receiving portion (130) is formed on the inner side of the channel member (80), and the wall of the blower motor (62) is arranged on the receiving portion (130).

20. The aspirator according to any one of claims 1-2, characterized in that There is a blower motor receiving portion (76), and at least one receiving portion for the channel member (80) is formed on the blower motor receiving portion.

21. The aspirator according to claim 20, characterized in that There is a first receiving portion (154) for a tab (152) of the channel member (80), having at least one of the following features: - At least one tab (152) is arranged on the upper side of the channel member (80); - At least one tab (152) is arranged on the second partial area (104) of the channel member (80) that ensures sealing against the cover (84); - At least one tab (152) extends in the axial direction (98); - When at least one tab (152) sinks into the receiving portion (154), the radial mobility of the channel member (80) relative to the blower motor (62) is prevented.

22. The aspirator according to claim 20, characterized in that There is a second receiving portion, which has a shoulder (124) and has at least one of the following features: - The channel member (80) has a shoulder (122) for matching with the second receiving portion; - The shoulder (122) of the channel member (80) is formed on the first partial area (104) that ensures support and / or sealing on the blower bracket (72); - The second receiving portion prevents the radial mobility and / or axial mobility of the blower motor (62).

23. The aspirator according to claim 20, wherein There is a third receiving portion that prevents radial mobility.

24. The aspirator according to any one of claims 1 - 2, wherein The channel member (80) has at least one tongue (156), and a mating element (160) for the at least one tongue (156) is assigned to the blower bracket (72), wherein when the tongue (156) is fixed to the mating element (160), the rotational mobility of the channel member (80) relative to the blower bracket (72) is prevented.

25. The aspirator according to claim 24, wherein The at least one tongue (156) has an opening (158), and the mating element (160) is a pin for passing through the opening.

26. The aspirator according to any one of claims 1 - 2, wherein The blower motor (62) is axially clamped.

27. The aspirator according to any one of claims 1 - 2, wherein At least one channel (82) of the channel member (80) has an output end (94) that opens directly or via a pipe element into an outlet for discharging process air exhaust into the surroundings of the suction device.

28. The aspirator according to claim 27, wherein The output end (94) of the at least one channel (82) has a circular cross-section.

29. The aspirator according to any one of claims 1 - 2, wherein The at least one channel (82) extends around the blower motor (62).

30. The aspirator according to any one of claims 1 - 2, wherein The at least one channel (82) has a trajectory that extends around an axis parallel or coaxial to the motor axis (66).

31. The aspirator according to any one of claims 1 - 2, wherein The at least one channel (82) has a helical trajectory.

32. The aspirator according to any one of claims 1 - 2, wherein It has a suction head (36) and a suction container (22), wherein the suction head (36) is detachably arranged on the suction container (22).

33. The aspirator according to claim 32, wherein The blower motor (62) is arranged on the suction head (36).

34. The aspirator according to any one of claims 1 - 2, wherein It has a vertical axis (40), wherein the motor axis (66) is oriented at an acute angle (68) to the vertical axis (40).

35. The aspirator according to any one of claims 1 - 2, wherein It has a configuration scheme with at least one of the following features: - As a stand-alone device; - As a wet / dry vacuum cleaner.

36. The aspirator according to claim 4, wherein The first opening (96) and / or the second opening (100) are oriented perpendicular to the axial direction.

37. The aspirator according to claim 5, wherein A sealing device is used to seal the blower motor (62) relative to the blower support (72) and / or relative to the cooling air guiding device (70) for the blower motor.

38. The aspirator according to claim 5, wherein The channel member (80) has a first partial region (102) that is supported on the blower support (72), and wherein the blower motor (62) is supported on the first partial region (102), and wherein the first partial region (102) is positioned between the blower motor (62) and the blower support (72) with respect to the axial direction (98).

39. The aspirator according to claim 6, wherein The first partial region (102) encloses the first opening (96) of the channel member (80), and the first partial region (102) forms a wall that encloses the first opening (96) in a closed manner.

40. The aspirator according to claim 9, characterized in that It has at least one of the following features: - The second region (114) follows the first region (112) in the axial direction (98); - The second region (114) has a larger diameter than the first region (112); - The first partial region (102) of the channel member (80) has a first abutment surface (118) for the blower motor (62) on the second region (114) of the first opening (96), and the first abutment surface is used to axially support the blower motor (62); - The first partial region (102) has a second abutment surface (120) for the blower motor (62) on the second region (114) of the first opening (96), and the second abutment surface is used to radially support the blower motor (62); - The first abutment surface (118) and / or the second abutment surface (120) are configured in an annular shape; - The first abutment surface (118) and the second abutment surface (120) transition continuously into each other.

41. The aspirator according to claim 13, characterized in that Having at least one of the following features: - The second partial region (104) is axially spaced from the first partial region (102) of the channel member (80) which ensures the support and / or fluid sealing of the blower motor (62) on the blower bracket (72); - At least one channel (82) of the channel member (80) is formed between the first partial region (102) and the second partial region (104); - The second partial region (104) is configured as a protruding tab (126) which sinks into a groove (128) on the blower motor (62); - The tab (126) extends at least substantially in the axial direction (98); - The tab (126) is configured in an annular shape; - The second partial region (104) surrounds the second opening (100) of the channel member (80); - A partial region of the cover (84) is positioned in the second opening (100).

42. The aspirator according to claim 16, characterized in that, A receiving portion (130), which is an annular receiving portion, is formed between the second partial region (104) and the third partial region (106) on the inner side of the channel member (80).

43. The aspirator according to claim 20, characterized in that Having a first receiving portion (154) for a tab (152) of the channel member (80), having at least one of the following features: - At least one tab (152) is arranged on the upper side of the channel member (80) which faces away from the blower bracket (72); - At least one tab (152) is arranged on the second partial region (104) of the channel member (80) which ensures sealing against the cover (84); - At least one tab (152) extends in the axial direction (98); - When at least one tab (152) sinks into the receiving portion (154), the radial movability of the channel member (80) relative to the blower motor (62) is prevented.

44. The aspirator according to claim 20, characterized in that Having a third receiving portion which prevents radial movability and also ensures the squeezing of the channel member (80) in the radial direction.

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