Guide pipe and portable cleaning equipment

Abstract

The utility model belongs to the field of articles for daily use, and particularly provides a guide pipe and portable cleaning equipment, which can adjust the direction of airflow to enable the airflow to face the direction expected by a user. The utility model provides a guide pipe, which can be connected with an air port end of a portable cleaner and change the airflow direction, and comprises a connecting section, a connecting section and a connecting section, the inner end of the bent section is communicated with the connecting section, and the outer end of the bent section extends towards the direction not coaxial with the air port end and is provided with a flow guide port for guiding airflow to flow into or out of the external environment; and the rotary positioning component enables the flow guide opening to rotate and be positioned in the preset direction. Furthermore, the utility model also provides the portable cleaning equipment which comprises a portable cleaner, a cleaning device and a controller, and the guide tube.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of daily necessities, and particularly relates to a guide pipe and a portable cleaning device. BACKGROUND

[0002] With the popularization and intelligentization of automobiles, the space in the car becomes an increasingly important living space of people. In order to create a good driving environment, a small-sized and portable cleaner is put out, and this kind of portable cleaner can be stored in the car, only temporarily uses a small part of the space, and can effectively clean the inside and outside of the car. For example, a portable dust collector can clean and collect dirt; a portable blowing and sucking dual-purpose machine can not only collect dirt, but also blow away dirt such as water and dust, especially in a small area.

[0003] However, the air outlet of the existing portable cleaner is usually located at the back of the air inlet, when the user holds the portable cleaner to make the air inlet face the surface to be cleaned for dust collection, the air outlet often faces the face at a close distance, and the strong air outlet during the dust collection process will directly blow the face, which brings an uncomfortable experience to the user. Especially in the process of cleaning in the car, due to the small space, the user is difficult to avoid. SUMMARY

[0004] The utility model is carried out in order to solve the above-mentioned problem, and the purpose is to provide a guide pipe and a portable cleaning device, which can adjust the air flow direction and make the air flow face the direction expected by the user.

[0005] In order to realize the above purpose, the utility model adopts the following scheme:

[0006] <Guide pipe>

[0007] The utility model provides a guide pipe, which can be connected with the air inlet end of a portable cleaner and change the air flow direction, and comprises: a connecting section connected with the air inlet end; a curved section, the inner end of which is connected with the connecting section in communication, the outer end of which extends in a direction different from the axis of the air inlet end and is provided with a guide port for guiding the air flow to flow into or flow out of the external environment; and a rotating positioning component, which can make the guide port rotate and position towards a predetermined direction.

[0008] The above scheme has the beneficial effects that:

[0009] The air path of the guide pipe is communicated with the air path of the air port end by the connecting section, and the air flow direction is changed by the bending section. The air flow direction of the air outlet or air inlet of the guide port can be adjusted by adjusting the bending section through the rotating positioning member, so that the user can conveniently and reliably adjust the air flow direction of the air outlet or air inlet of the guide port, and the air outlet or air inlet is away from the user, other passengers or other areas that the user does not want to face, and the air outlet or air inlet faces the direction desired by the user. The air flow direction is adjusted more stably and reliably after rotation and positioning, so that the guide pipe is not rotated by the air flow or is not turned downward due to gravity.

[0010] Preferably, in the guide pipe provided by the utility model, the rotating positioning member comprises a rotating member and a positioning member for positioning the rotating member, and the rotating member is installed on the connecting section, the bending section or the air port end. When the rotating member is installed on the connecting section, the positioning member is installed on the bending section or the air port end. When the rotating member is installed on the bending section or the air port end, the positioning member is installed on the connecting section. The rotating positioning member can be any structure that can make two pipes relatively rotate or rotate and position (fix an angle). The rotating and positioning mode includes but is not limited to meshing, clamping, locking and ball embedding.

[0011] Preferably, in the guide pipe provided by the utility model, the rotating member comprises a stress part arranged on the outer wall of the connecting section, the bending section or the air port end, and a slidable and positionable sliding part arranged on the connecting section, the bending section or the air port end and matched with the positioning member.

[0012] Preferably, in the guide pipe provided by the utility model, the stress part is a circle of anti-skid lines, a push button, a protruding block or other structures that are easy to prevent slipping and bear the force applied by the user to rotate. The sliding part comprises at least one sliding unit arranged on the connecting section, the bending section or the air port end. Correspondingly, the positioning member is matched with the sliding part and comprises at least one positioning unit arranged on the bending section, the air port end or the connecting section. In the two types of sliding units and positioning units, if the number of one type of unit is 1, the number of the other type of unit is greater than 1, so that the rotating direction can be adjusted at multiple angles. For example, if the number of the sliding unit is 1, the number of the positioning unit is at least 2. In addition, the sliding unit can be a protruding structure or a recessed structure. For example, the protruding structure can be a long strip-shaped arc-shaped protrusion, and can also be a semispherical structure. Correspondingly, the recessed structure can also be a long strip-shaped groove, and can also be a semispherical pit. The semisphere refers to a non-complete sphere. Especially for narrow areas, the rotating direction can be adjusted at multiple angles, so that the user can more easily adjust the air flow direction, and the user can easily operate the rotating positioning member when bending, crouching or crawling into the trunk, and the air flow direction can be quickly and stably adjusted through simple actions, thereby bringing sufficient convenience to the user.

[0013] Specifically, the guide pipe provided by the utility model is characterized in that the connecting section and the curved section are of an integrated structure or a split structure; when the connecting section and the curved section are of an integrated structure, the rotary positioning member can be installed at the connecting position of the guide pipe and the air outlet end; when the connecting section and the curved section are of a split structure, the connecting section can be a connecting pipe, the curved section can be an elbow pipe, and the rotary positioning member can be installed at the connecting position of the connecting pipe and the elbow pipe or the connecting position of the guide pipe and the air outlet end. The connecting section can also be arranged only on the outer surface or the inner surface of the curved section.

[0014] Preferably, in the guide pipe provided by the utility model, the curved section comprises a first part coaxial with the connecting section and a second part non-coaxial with the connecting section; the second part is provided with a flow guide opening at the end away from the connecting section, and the deviation angle of the flow guide opening in the axial direction relative to the axial direction of the air outlet end is a bending angle. The first part can be very short, and the extension length of the second part is comparable to the length of the first part, so that the overall length (in the axial direction of the air outlet end) of the portable cleaner will not increase much after the guide pipe is connected, facilitating user operation.

[0015] Preferably, in the guide pipe provided by the utility model, the axial direction of the curved section can form a bending angle of not less than A with the axial direction of the air outlet end, and A is any value in the range of 20°-90°. A can correspond to the first part or the second part of the curved section.

[0016] Preferably, in the guide pipe provided by the utility model, the air outlet end is the air outlet end or the air inlet end of the portable cleaner. When the target area is treated by the treatment end of the portable cleaner, the air outlet or air inlet direction of the air outlet end facing the user can be changed through the guide pipe. When the target area is treated by the treatment end of the portable cleaner, the air outlet end is the air outlet end, and the guide pipe is an air outlet guide pipe changing the air outlet flow direction (path), so that the air outlet guide pipe can avoid the air outlet directly blowing the face or other areas that the user does not want to be blown by. When the target area is treated by the treatment end of the portable cleaner, the air outlet end is the air inlet end (air suction port), and the guide pipe is an air inlet guide pipe changing the air inlet flow direction, so that the air inlet guide pipe can avoid the air inlet facing the hair on the head, the clothes on the body, and other areas that the user does not want to be affected by the air suction, preventing accidental suction.

[0017] Preferably, in the guide pipe provided by the utility model, the rotatable range of the rotary positioning member is 360°, and the positioning interval is B, 0°<B≤180°. In this way, the user can freely adjust the position and direction (angle) of the air outlet or air inlet as needed. For example, according to user habits or different holding hands, right-handed people can rotate the flow guide opening (air outlet or air inlet) of the guide pipe to the right side of the host, and left-handed people can rotate the flow guide opening (air outlet or air inlet) of the guide pipe to the left side of the host.

[0018] <Portable cleaning device>

[0019] Further, the utility model also provides a portable cleaning device, include: portable cleaner and the guide pipe of any one described in <guide pipe> above. The cleaning device includes the guide pipe described in <guide pipe> above, therefore has the same beneficial effect recorded in <guide pipe> above.

[0020] In the portable cleaner, there is a processing end and a air port end on the flow path of the processing end, the processing end and the air port end are any one of the air inlet end and the air outlet end respectively, and the processing end and the air port end are different. When the processing end is the air inlet end, the air port end is the air outlet end; vice versa. The air inlet end and the air outlet end can be the two ends of the main machine of the portable cleaner for installing the blowing nozzle and the suction nozzle, or the two ends formed by the blowing nozzle and the suction nozzle which have been installed on the main machine.

[0021] The portable cleaner can be a blowing and suction dual-purpose machine. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a structural schematic view of the portable cleaning device related to the embodiment of the utility model;

[0023] Fig. 2 is a sectional view of the portable cleaning device related to the embodiment of the utility model;

[0024] Fig. 3 is an enlarged view of region I in Fig. 2; Figure 2

[0025] Fig. 4 is a structural schematic view of the guide pipe and the portable cleaner related to the embodiment of the utility model;

[0026] Fig. 5 is an enlarged view of region II in Fig. 4; Figure 4

[0027] Fig. 6 is an exploded view of the guide pipe related to the embodiment of the utility model;

[0028] Fig. 7 is a sectional view of the guide pipe related to the embodiment of the utility model;

[0029] Fig. 8 is an exploded sectional view of the guide pipe related to the embodiment of the utility model;

[0030] Fig. 9 is a structural schematic view of the right-hand operation portable cleaning device related to the embodiment of the utility model;

[0031] Fig. 10 is a structural schematic view of the left-hand operation portable cleaning device related to the embodiment of the utility model;

[0032] ​​Fig. 11 is a structural schematic diagram of the portable cleaner main machine without the suction nozzle according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The guiding pipe and the portable cleaning device according to the present application will be described in detail below with reference to the accompanying drawings. EMBODIMENT

[0034] As shown in Fig. 1, the portable cleaning device 1000 includes a portable cleaner 10 and a guiding pipe 20. Figures 1-11

[0035] In this embodiment, the portable cleaner 10 is a blower-suction dual-purpose machine, which can clean the dirt on the surface to be cleaned by suction and blowing. The portable cleaner 10 includes a main machine 11, a battery unit 12, a charging unit 13, and a suction nozzle 14.

[0036] The main machine 11 includes a shell 111, an electric fan 112, a handle 113, and a button 114. The shell 111 is in a cylindrical shape, and has an air inlet end 111-1 and an air outlet end 111-2 at two ends respectively. The electric fan 112 is arranged in the shell 111 as a negative pressure source for generating the suction airflow flowing in from the air inlet end 111-1 and the blowing airflow flowing out from the air outlet end 111-2. The handle 113 extends downward from the shell 111, and is used for the user to hold, and is in a hollow structure. The button 114 is installed on the top of the main machine 11.

[0037] The battery unit 12 (battery pack) is detachably installed in the handle 113, and is connected with the electric fan 112, and is used for supplying power to the electric fan 112.

[0038] The charging unit 13 is arranged in the handle 113, and is connected with the battery unit 12, and is used for charging the battery unit 12.

[0039] The suction nozzle 14 is used for dust collection, and is detachably installed at the air inlet end 111-1 of the main machine 11. In this embodiment, the detachable installation mode can be various detachable connection modes such as clamping, fitting, screwing, etc. The suction nozzle 14 includes a dust cup 141, a filter frame 142, and a HEPA filter 143. The dust cup 141 is used for dust collection. The filter frame 142 is arranged in the dust cup 141, and is used for pre-filtering the dirt sucked by the suction nozzle 14, and filtering the dirt with large volume (relative to the HEPA filter 143). The HEPA filter 143 is used for deeply filtering the pre-filtered dirt, and filtering out the small dirt.

[0040] The guiding pipe 20 is detachably connected with the air port end (detailed below) of the portable cleaner 10, and is used for changing the airflow direction. The guiding pipe 20 includes a connecting segment 21, a bending segment 22, and a rotating positioning member 23.

[0041] ​In this embodiment, the connecting section 21 and the curved section 22 are in a split structure, the connecting section 21 is a connecting pipe, and the curved section is a curved pipe 22 in which at least one pipe section is curved.

[0042] According to the use state of the portable cleaner 10, one end of the two ends of the air inlet (air inlet) and the air outlet (air outlet) of the portable cleaner 10, which is used by the user to suck or blow the target area to be processed, is the processing end, and the other end is the air port end. When the target area is sucked by the processing end of the portable cleaner 10, the air port end is the air outlet end 111-2 (blow / exhaust end), the guide pipe 20 is an air outlet guide pipe that changes the direction (path) of the air flow, and in this case, the air outlet guide pipe can avoid the air outlet directly blowing on the face or other areas that the user does not want to blow. When the target area is blown by the processing end of the portable cleaner, the air port end is the air inlet end 111-1 (suction end), and then the guide pipe 20 is an air inlet guide pipe that changes the direction of the air flow, and in this case, the air inlet guide pipe can avoid the air inlet towards the long hair on the head, the clothes on the body, and other areas that the user does not want to be affected by the suction, preventing accidental suction. In this embodiment, for ease of description, the air port end is taken as the air outlet end 111-2 as an example for description below.

[0043] The connecting section 21 is detachably connected to the air outlet end 111-2. As shown in Figures 4-8 In this embodiment, the connecting section 21 is a connecting pipe coaxially connected to the air outlet end 111-2, and the inner end of the connecting section 21 is uniformly provided with a plurality of L-shaped lock grooves 211. The L-shaped lock grooves 211 extend along the axial direction first and then extend along the circumferential direction from the proximal end (close to the air outlet end 111-2) of the connecting section 21, and the circumferential extension area is provided with a clamping edge 211a. Correspondingly, the air outlet end 111-2 is provided with a plurality of lock blocks 111-2a that match and engage the L-shaped lock grooves 211. Inserting the connecting section 21 into the air outlet end 111-2 and rotating along the L-shaped lock grooves 211 makes the lock blocks 111-2a and the clamping edges 211a fit, thereby completing the installation and locking (connection).

[0044] The inner end 221 of the curved section 22 is connected to the connecting section 21, and the outer end 222 extends in a direction different from the air port end. A flow guide opening 223 is provided on the outer end 222 to guide the air flow into or out of the external environment. The inner end 221 refers to the proximal end of the connecting section 21, and the inner end 221 is connected to the connecting section 21 in a manner that the inner end 221 surrounds the connecting section 21, the inner end 221 is inserted into the connecting section 21, or the inner end 221 is embedded with the connecting section 21. The outer end 222 refers to the end of the pipe section extending outwardly from the inner end 221 of the curved section 22. The flow guide opening 223 is an opening on the guide pipe 20 that is exposed to the external environment.

[0045] In the embodiment, the inner end 221 is inserted into the connecting section 21 and contacts the inner wall of the connecting section 21. The inner end 221 is provided with a ring of clamping ribs 221a, and the connecting section 21 is uniformly provided with three buckles 212 corresponding to the clamping ribs 221a. After the three buckles 212 are matched with the clamping ribs 221a, the curved section 22 is stably connected with the connecting section 21.

[0046] The curved section 22 includes a first part 224 coaxial with the connecting section 21 and a second part 225 non-coaxial with the connecting section 21. The flow guide 223 is arranged at the end of the second part 225 away from the connecting section 21. The angle between the axial direction of the flow guide 223 and the axial direction of the air outlet end is defined as the bending angle, and the axial direction of the curved section 22 can be bent at an angle of about 90° relative to the axial direction of the air outlet end.

[0047] The rotating positioning member 23 is used to rotate and position the flow guide 223 in a predetermined direction. The rotating positioning member 23 includes a rotating member 231 and a positioning member 232 for positioning the rotating member 231. The rotating member 231 can be installed on the connecting section 21, the curved section 22 or the air outlet end; when the rotating member 231 is installed on the connecting section 21, the positioning member 232 can be installed on the curved section 22 or the air outlet end; when the rotating member 231 is installed on the curved section 22 or the air outlet end, the positioning member 232 is installed on the connecting section 21.

[0048] In the embodiment, the positioning member 232 is installed on the connecting section 21 and includes two positioning ribs 232-1 symmetrically arranged on the inner wall of the connecting section 21. The cross section of the positioning rib 232-1 is arc-shaped, and the two positioning ribs 232-1 are spaced apart by 180°. The rotating member 231 is installed on the curved section 22 and includes a force receiving part 231-1 and a sliding part 231-2. The force receiving part 231-1 is a ring of anti-slip patterns arranged around the outer wall of the connecting section 21, which is easy for a user to rotate. The sliding part 231-2 is arranged on the curved section 22 and matched with the positioning member 232, and can slide and be positioned relative to the air outlet end 111-2. Figure 6As shown, the sliding part 231-2 is a circle of evenly spaced grooves 231-2a, and the cross section of the groove 231-2a is arc-shaped. In this embodiment, there are 12 grooves 231-2a, and the angle between adjacent grooves 231-2a is 30°, which is the smallest unit that the rotating part 231 can be positioned. The rotatable range of the rotating positioning member 23 is at least 360°, and the positioning interval is 30°. When two positioning ribs 232-1 slide into the corresponding two grooves 231-2a, the rotating part 231 is positioned, and the guide port 223 is positioned relative to the air outlet end 111-2; otherwise, when adjustment is needed, for example, a 60° rotation is needed, the current two (a group) grooves 231-2a are rotated away from the positioning rib 232-1, and the third group of grooves 231-2a is rotated to match the positioning rib 232-1. The rotating force is less than the unlocking force of the guide pipe 20, or the rotating direction is limited to be the same as the unlocking direction.

[0049] As shown, Figures 1-11 Based on the above structure, the specific use mode of the portable cleaning device 1000 (mainly the guide pipe 20) provided by the embodiment is as follows:

[0050] The user inserts the connecting section 21 of the guide pipe 20 into the air outlet end 111-2, and rotates the guide pipe 20 to be locked and connected with the air outlet end 111-2 through the force receiving part 231-1. Then, the user directs the suction nozzle 14 of the portable cleaner 10 to the target area to be cleaned in the vehicle. According to the direction F1 of the guide port 223 of the guide pipe 20 at this time, the user determines whether it needs to be adjusted to other direction F2.

[0051] If adjustment is needed, the user rotates the curved section 22 with fingers, and then drives the inner end 221 of the curved section 22 to rotate and position relative to the connecting section 21, and the guide port 223 changes the direction accordingly. When the guide port 223 is positioned to the direction F2 that the user expects it to be directed, the rotation is stopped.

[0052] At this time, the user can start the electric fan 112 through the button 114, and the suction nozzle 14 starts to clean and collect dust in the target area. The filtered air flow enters the guide pipe 20 from the air outlet end 111-2, and is discharged from the guide port 223 to the direction F2.

[0053] Of course, the user can also start the electric fan 112 before adjusting the guide pipe 20, feel the air flow direction, and then rotate to adjust the direction of the guide port 223.

[0054] In addition, the guide pipe 20 can be adjusted according to user habits or different holding hands. For example, the air outlet end 111-2 is directed to the center of the watch dial, and the 12 positions correspond to the 12 scales (hours) of the watch, such as Figure 10As shown, the right-handed person can rotate the flow guide 223 of the guide tube 20 to the right side of the portable cleaner 10, about 4 o'clock direction; the left-handed person can rotate the flow guide 223 to the left side of the portable cleaner 10, about 8 o'clock direction. The 4 o'clock and 8 o'clock directions here are only examples, and can be adjusted to other directions.

[0055] When the guide tube 20 is used up and needs to be removed, it can be removed from the air outlet end 111-2 by rotating in the opposite direction of the installation (for example, clockwise during installation, and counterclockwise at this time).

[0056] The above embodiments are only examples of the technical solutions of the present application. The guide tube and portable cleaning equipment involved in the present application are not limited to the content described in the above embodiments, but are subject to the scope defined in the claims. Any modification or supplement or equivalent replacement made by the skilled in the art on the basis of the above embodiments is within the scope claimed by the claims of the present application.

[0057] In the above embodiments, the air outlet end is taken as an example to explain the disassembly and flow guide of the guide tube. In the present application, as shown in Figure 11 After the suction nozzle is removed, the exposed air inlet end 111-1 can also be matched with the connection section of the guide tube.

[0058] In addition, in the above embodiments, the air outlet end is the end of the portable cleaner main machine used for installing the blowing nozzle or the suction nozzle. In the present application, the air outlet end can also be the end formed by the blowing nozzle or the suction nozzle after the blowing nozzle or the suction nozzle is installed on the main machine.

[0059] In addition, in the above embodiments, the connection section and the curved section are of a split structure, the connection section is a connecting pipe, and the curved section is a bent pipe with at least one part of the pipe section bent. In the present application, the connection section and the curved section can also be of an integrated structure, and the rotating positioning member can be installed at the connection between the guide tube and the air outlet end. In addition, when the connection section and the curved section are of a split structure, the rotating positioning member can also be installed at the connection between the guide tube and the air outlet end.

[0060] In addition, in the above embodiments, there are 12 sliding units, corresponding to 12 gears in a circle. In the present application, the number of sliding units is not limited to this, and more can also be set, so as to divide into more gears for more accurate adjustment, or less can also be set. Similarly, the number of positioning units can also be adjusted according to actual needs.

[0061] In addition, in the above embodiments, the axis of the flow guide is always crossed with the axis of the air outlet end. In the present application, the flow guide can also be located in a plane parallel to the axis of the air outlet end and rotated in different directions in the plane.

[0062] Furthermore, the mutual cooperation connection, clamping, and locking mechanism between any two structures can be interchangeably installed.

Claims

1. A guide tube capable of connecting to the air outlet end of a portable cleaner facing away from the surface to be cleaned and changing the direction of the air flow, characterized in that, The application relates to a guide pipe for a portable cleaner. The guide pipe comprises: a connecting section connected to the air outlet end; a bending section, the inner end of which is connected to the connecting section, and the outer end of which extends towards a direction different from the axis of the air outlet end and is provided with a guide opening for guiding the airflow to flow into or out of the external environment; and a rotating positioning member for enabling the guide opening to rotate and position towards a predetermined direction.

2. The guide pipe according to claim 1, wherein the rotating positioning member comprises a rotating member and a positioning member for positioning the rotating member, the rotating member is installed on the connecting section, the bending section or the air outlet end; when the rotating member is installed on the connecting section, the positioning member is installed on the bending section or the air outlet end; when the rotating member is installed on the bending section or the air outlet end, the positioning member is installed on the connecting section.

3. The guide pipe according to claim 2, wherein the rotating member comprises a force receiving part arranged on the outer wall of the connecting section, the bending section or the air outlet end, and a slidable and positioned sliding part arranged on the connecting section, the bending section or the air outlet end and matched with the positioning member.

4. The guide pipe according to claim 3, wherein the force receiving part comprises any one of anti-skid lines, push buttons and protrusions; the sliding part comprises at least one sliding unit arranged on the connecting section, the bending section or the air outlet end; correspondingly, the positioning member is matched with the sliding part and comprises at least one positioning unit arranged on the bending section, the air outlet end or the connecting section; the number of the sliding units and the positioning units is greater than 1 when the number of one type of units is 1. wherein 5. The guide pipe according to claim 1, wherein the connecting section and the bending section are in an integrated structure or a split structure; when the connecting section and the bending section are in the integrated structure, the rotating positioning member is installed at the connection between the guide pipe and the air outlet end; when the connecting section and the bending section are in the split structure, the connecting section is a connecting pipe, the bending section is a bent pipe with at least one part of the pipe bent, and the rotating positioning member is installed at the connection between the connecting pipe and the bent pipe or at the connection between the guide pipe and the air outlet end.

6. The guide pipe according to claim 1, wherein the bending section comprises a first part coaxial with the connecting section and a second part different from the axis of the connecting section; the second part is provided with the guide opening at the end away from the connecting section, and the guide opening is axially offset from the air outlet end by a bending angle. wherein 7. The guide pipe according to claim 6, wherein the axial direction of the bending section can be offset from the axial direction of the air outlet end by a bending angle not less than A, and A is any value in the range of 20°-90°.

8. The guide pipe according to claim 1, wherein the air outlet end is an air outlet end or an air inlet end of the portable cleaner. wherein 9. The guide pipe according to claim 1, wherein the rotating range of the rotating positioning member is at least 360°, and the positioning interval is B, 0° ​ ​ 5. The guide tube of claim 1, ​ ​ ​ ​ ​ ​ wherein ​ ​ wherein ​ ​ wherein, ​ ​ wherein, ​ 10. A portable cleaning apparatus characterized by, ​ A portable cleaner has a treatment end for suction or blowing treatment toward a surface to be cleaned, and a nozzle end facing away from the surface to be cleaned. and A guide tube according to any one of claims 1 to 9, which is connectable to the nozzle end and changes the direction of the air flow.

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