DE202020104048U1 - Air-conducting rotary spray device with an internal and an external air flow channel and air-conducting rotary spray unit of the same - Google Patents

Abstract

Air-conducting rotary spray device with an internal and an external air flow channel, comprising:
an air-conducting rotary injection unit (1), with:
a fixed sleeve (11);
a rotating inner tube (14) rotatably disposed about an axis (X) in the fixed sleeve (11); and
a rotating spray head (15), with:
a spray head sleeve (151) which is connected to the rotating inner tube (14) and has a receiving space (S); and
an air flow plug (152) which is located in the receiving space (S) and is fastened in the spray head sleeve (151), the air flow plug (152) having a first spiral air guide slot (1521), a second spiral air guide slot (1522), a central through hole (1523) and a lateral air injection hole (1524), wherein the first spiral air guide slot (1521) delimits a first spiral air guide channel (SA1) in cooperation with the inner wall of the spray head sleeve (151), and wherein the second spiral air guide slot (1522) is arranged symmetrically to the first spiral air guide slot (1521) is and in cooperation with the inner wall of the spray head sleeve (151) delimits a second spiral air duct (SA2), and wherein the central through hole (1523) extends along the axis (X), and wherein the side air injection hole (1524) extends along one of the axis (X) intersecting beam direction (D1) and with the second spiral air guide slot (1522) ko mmunicated;
a connecting sleeve (16) connected to the fixed sleeve (11) and communicating with the rotating inner tube (14); and
a guide tube (17) which is fastened in the connecting sleeve (16) and extends along the axis (X) through the rotating inner tube (14) to the central through hole (1523), the guide tube (17) in the rotating inner tube ( 14) limits an external air flow channel (AF1), which communicates with the connecting sleeve (16), the first spiral air duct (SA1) and the second spiral air duct (SA2); and
a gas-liquid supply unit (2), with:
a spray gun (21) connected to the connecting sleeve (16) and used to deliver a flow of compressed air into the guide tube (17); and
a liquid supply device (22) connected to the spray gun (21) and having a liquid supply pipe (221) inserted in the guide pipe (17) and extending to the central through hole (1523) for supplying a liquid, wherein the liquid supply pipe (221) in the guide tube (17) delimits an internal air flow channel (AF2) which communicates with the connecting sleeve (16) and the central through hole (1523), the compressed air flow through the guide tube (17) to the external air flow channel (AF1) and to the internal air flow channel (AF2) flows in such a way that the compressed air flow through the external air flow channel (AF1) reaches the first spiral air duct (SA1) and the second spiral air duct (SA2) in order to set the rotating spray head (15) in rotation and at the same time lateral air flow from the side air injection hole (1524), and wherein when the compressed air flow through the internal Lu ft flow channel (AF2) is ejected from the central through hole (1523), the liquid in the liquid supply pipe (221) is ejected along the axis (X), and the lateral air flow is used to determine the direction of the spray of the liquid injected along the axis (X) to change so that the liquid can be sprayed rotatably out of the rotating spray head (15).

Description

The invention relates to an air-conducting rotary spray device and an air-conducting rotary spray unit of the same, in particular an air-conducting rotary spray device with an internal and an external air flow duct and an air-conducting rotary spray unit of the same.

For effective cleaning in everyday life, the water is normally sprayed onto the surface of the object, which is then cleaned with a brush, towel or the like. is wiped off. However, this cleaning process is very time consuming, troublesome, and wastes water resources.

In order to effectively carry out the cleaning operation, a method has been developed in which the liquid can be rotatably sprayed out such as by bending a flexible hose. From the TW M441519 a device for rotatable spraying of liquids is known. A delivery tube is used to convey a liquid from a liquid inlet through a liquid outlet to a flex-tube. When a high-pressure gas enters the flex-tube through a gas passage, an eddy current is generated in the flex-tube to rotate the flex-tube, so that the liquid sent to the flex-tube is rotatably ejected from the flex-tube.

Although the effect of rotatably spraying liquids is achieved using the above-mentioned flex-tube, the manufacture and assembly of the flex-tube are complicated, which increases the difficulty of manufacture. In addition, the bending tube is easier to deform due to the influence of external forces.

The invention is based on the object of creating an air-conducting rotary spray device with an internal and an external air flow channel and an air-conducting rotary spray unit of the same, which avoids the above-mentioned disadvantages by simple measures, a flow of compressed air through the internal air flow channel directly driving the liquid to spray out , and wherein the compressed air flow through the external air flow channel is pressed directly against an air flow connector so that the direction of spray of the liquid changes.

This object is achieved according to the invention by an air-conducting rotary spray device with an internal and an external air flow channel, which has the features specified in claim 1, and by an air-conducting rotary spray unit which has the features specified in claim 3. Further advantageous developments of the invention emerge from the features of the subclaims.

• eine luftleitende Rotationsspritzeinheit, mit:
  • einer festen Hülse;
  • einem rotierenden Innenrohr, das drehbar um eine Achse in der festen Hülse angeordnet ist; und
  • einem rotierenden Spritzkopf, mit:
    • einer Spritzkopfhülse, die mit dem rotierenden Innenrohr verbunden ist und einen Aufnahmeraum aufweist; und
    • einem Luftstromstecker, der sich im Aufnahmeraum befindet und in der Spritzkopfhülse befestigt ist, wobei der Luftstromstecker einen ersten Spiralluftführungsschlitz, einen zweiten Spiralluftführungsschlitz, ein zentrales Durchgangsloch und ein seitliches Luftspritzloch aufweist, wobei der erste Spiralluftführungsschlitz im Zusammenwirken mit der Innenwand der Spritzkopfhülse einen ersten Spiralluftführungskanal begrenzt, und wobei der zweite Spiralluftführungsschlitz zum ersten Spiralluftführungsschlitz symmetrisch angeordnet ist und im Zusammenwirken mit der Innenwand der Spritzkopfhülse einen zweiten Spiralluftführungskanal begrenzt, und wobei sich das zentrale Durchgangsloch entlang der Achse erstreckt, und wobei sich das seitliche Luftspritzloch entlang einer die Achse schneidenden Strahlrichtung erstreckt und mit dem zweiten Spiralluftführungsschlitz kommuniziert;
  • einer Verbindungshülse, die mit der festen Hülse verbunden ist und mit dem rotierenden Innenrohr kommuniziert; und
  • einem Führungsrohr, das in der Verbindungshülse befestigt ist und sich entlang der Achse durch das rotierende Innenrohr hindurch zum zentralen Durchgangsloch hin erstreckt, wobei das Führungsrohr im rotierenden Innenrohr einen externen Luftströmungskanal begrenzt, der mit der Verbindungshülse, dem ersten Spiralluftführungskanal und dem zweiten Spiralluftführungskanal kommuniziert; und
• eine Gas-Flüssigkeits-Zufuhreinheit, mit:
  • einer Spritzpistole, die mit der Verbindungshülse verbunden ist und verwendet wird, um einen Druckluftstrom in das Führungsrohr zu liefern; und
  • einer Flüssigkeitszufuhrvorrichtung, die mit der Spritzpistole verbunden ist und ein Flüssigkeitszufuhrrohr aufweist, das in das Führungsrohr eingeführt ist und sich zum zentralen Durchgangsloch hin erstreckt, um eine Flüssigkeit zu liefern, wobei das Flüssigkeitszufuhrrohr im Führungsrohr einen internen Luftströmungskanal begrenzt, der mit der Verbindungshülse und dem zentralen Durchgangsloch kommuniziert,

wobei der Druckluftstrom durch das Führungsrohr zum externen Luftströmungskanal und zum internen Luftströmungskanal so strömt, dass der Druckluftstrom durch den externen Luftströmungskanal direkt an den ersten Spiralluftführungskanal und den zweiten Spiralluftführungskanal gelangt, um den rotierenden Spritzkopf in Rotation zu versetzen und gleichzeitig einen seitlichen Luftstrom aus dem seitlichen Luftspritzloch auszustoßen, und wobei, wenn der Druckluftstrom durch den internen Luftströmungskanal aus dem zentralen Durchgangsloch ausgestoßen wird, die Flüssigkeit im Flüssigkeitszufuhrrohr entlang der Achse ausgestoßen wird, und wobei der seitliche Luftstrom verwendet wird, um die Spritzrichtung der entlang der Achse gespritzten Flüssigkeit zu ändern, sodass die Flüssigkeit drehbar aus dem rotierenden Spritzkopf herausgespritzt werden kann.According to the invention there is provided an air-conducting rotary spray device having an internal and an external air flow channel, comprising:

• an air-conducting rotary injection unit with:
  • a fixed sleeve;
  • a rotating inner tube rotatably disposed about an axis in the fixed sleeve; and
  • a rotating spray head with:
    • a spray head sleeve which is connected to the rotating inner tube and has a receiving space; and
    • an air flow plug, which is located in the receiving space and is fastened in the spray head sleeve, the air flow plug having a first spiral air guide slot, a second spiral air guide slot, a central through hole and a lateral air injection hole, the first spiral air guide slot in cooperation with the inner wall of the spray head sleeve delimiting a first spiral air duct , and wherein the second spiral air guide slot is arranged symmetrically to the first spiral air guide slot and, in cooperation with the inner wall of the spray head sleeve, delimits a second spiral air guide channel, and wherein the central through hole extends along the axis, and wherein the lateral air spray hole extends along a jet direction intersecting the axis and communicates with the second spiral air guide slot;
  • a connecting sleeve connected to the fixed sleeve and communicating with the rotating inner tube; and
  • a guide tube which is fixed in the connecting sleeve and extends along the axis through the rotating inner tube to the central through hole, the guide tube in the rotating inner tube defining an external air flow channel which communicates with the connecting sleeve, the first spiral air duct and the second spiral air duct; and
• a gas-liquid supply unit with:
  • a spray gun connected to the connector sleeve and used to deliver a flow of compressed air into the guide tube; and
  • a liquid supply device which is connected to the spray gun and has a liquid supply pipe which is inserted into the guide pipe is inserted and extends towards the central through-hole to deliver a liquid, wherein the liquid supply pipe in the guide tube defines an internal air flow channel which communicates with the connecting sleeve and the central through-hole,

wherein the compressed air flow through the guide tube to the external air flow channel and to the internal air flow channel flows so that the compressed air flow through the external air flow channel directly reaches the first spiral air duct and the second spiral air duct in order to set the rotating spray head in rotation and at the same time a lateral air flow from the side Ejecting the air injection hole, and wherein, when the compressed air flow is ejected from the central through hole through the internal air flow passage, the liquid in the liquid supply pipe is ejected along the axis, and the side air flow is used to change the direction of injection of the liquid injected along the axis, so that the liquid can be sprayed rotatably out of the rotating spray head.

According to the invention, the air-conducting rotary injection unit also has a bearing that has an outer bearing ring and an inner bearing ring, the outer bearing ring being attached to the inner wall of the fixed sleeve, while the inner bearing ring is rotatably supported in the outer bearing ring and mounted on the rotating inner tube.

According to the invention, the first spiral air guide slot and the second spiral air guide slot of the air flow connector with the spray head sleeve form a first spiral air guide channel or second spiral air guide channel, so that the rotating spray head can be driven by the spiral structure when the compressed air stream flows through the first spiral air guide channel and the second spiral air guide channel. In addition, the side air injection hole communicating with the second spiral air guide slot enables the compressed air flow to be ejected obliquely in the direction of the axis, thereby changing the jet direction of the liquid ejected from the central through hole, thus creating a rotating injection effect.

According to the invention, a guide tube is also used which passes through the rotating inner tube and extends to the central through hole of the air flow plug, so that the guide tube delimits an external air flow channel in the rotating inner tube. The compressed air stream flowing into the connecting sleeve can thus pass directly through the external air flow channel to the first spiral air duct and the second spiral air duct. In addition, the fluid supply pipe located in the guide tube limits an internal air flow channel in the guide tube, so that the compressed air flow flowing into the connecting sleeve can reach the central through hole directly through the internal air flow channel. Then the liquid in the liquid supply pipe is squirted out.

• 1 eine perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen luftleitenden Rotationsspritzgeräts mit einem internen und einem externen Luftströmungskanal;
• 2 eine perspektivische Explosionsdarstellung des Ausführungsbeispiels eines erfindungsgemäßen luftleitenden Rotationsspritzgeräts mit einem internen und einem externen Luftströmungskanal, wobei eine feste Hülse, ein rotierender Spritzkopf, eine Verbindungshülse, ein Führungsrohr und eine Schutzhülse zu Veranschaulichungszwecken getrennt gezeigt sind;
• 3 eine perspektivische Explosionsdarstellung des Ausführungsbeispiels eines erfindungsgemäßen luftleitenden Rotationsspritzgeräts mit einem internen und einem externen Luftströmungskanal, wobei der rotierende Spritzkopf, die Verbindungshülse und das Führungsrohr zu Veranschaulichungszwecken getrennt gezeigt sind;
• 4 eine perspektivische Explosionsdarstellung des erfindungsgemäßen rotierenden Spritzkopfs gemäß dem Ausführungsbeispiel der vorliegenden Erfindung;
• 5 einen Schnitt entlang der Linie A-A in 1;
• 6 eine teilweise vergrößerte schematische Ansicht von 5; und
• 7 einen Schnitt entlang der Linie B-B in 1.

The invention and its configurations are explained in more detail below with reference to the drawing. In the drawing shows:

• 1 a perspective view of an embodiment of an air-conducting rotary spray device according to the invention with an internal and an external air flow channel;
• 2 a perspective exploded view of the embodiment of an air-conducting rotary spray device according to the invention with an internal and an external air flow channel, wherein a fixed sleeve, a rotating spray head, a connecting sleeve, a guide tube and a protective sleeve are shown separately for illustrative purposes;
• 3 a perspective exploded view of the embodiment of an air-conducting rotary spray device according to the invention with an internal and an external air flow channel, wherein the rotating spray head, the connecting sleeve and the guide tube are shown separately for purposes of illustration;
• 4th a perspective exploded view of the rotating spray head according to the invention according to the embodiment of the present invention;
• 5 a section along the line AA in 1 ;
• 6th a partially enlarged schematic view of FIG 5 ; and
• 7th a section along the line BB in 1 .

As from the 1 to 7th can be seen, has an air-conducting rotary spray device according to the invention 100 an air-conducting rotary injection unit with an internal and an external air flow channel 1 and a gas-liquid supply unit 2 on.

The air-conducting rotary injection unit 1 has a solid sleeve 11 , two camps 12th [only one is shown in the drawing], a separation pipe 13 , a rotating inner tube 14th , a rotating spray head 15th , a connecting sleeve 16 , a guide tube 17th , a protective sleeve 18th and a bristle element 19th on.

The solid sleeve 11 has a first end portion 111 and a second end portion 112 which are arranged in opposite directions. The two camps 12th are in the solid sleeve 11 spaced apart. The separation pipe 13 is between the two camps 12th provided to the two bearings 12th to separate from each other. The warehouse 12th has an outer bearing ring 121 and a bearing inner ring 122 on. The bearing outer ring 121 is on the inner wall of the fixed sleeve 11 attached, the bearing inner ring 122 rotatable in the bearing outer ring 121 is arranged. Therefore, in practice there are several balls [not shown] between the bearing outer ring 121 and the bearing inner ring 122 provided so that the bearing outer ring 121 and the bearing inner ring 122 can rotate against each other.

The rotating inner tube 14th is firmly on the bearing inner ring 122 of the two camps 12th mounted so that the rotating inner tube 14th rotatable about an axis X in the fixed sleeve 11 is arranged.

The rotating spray head 15th has a spray head sleeve 151 and an airflow connector 152 on. The spray head sleeve 151 is with the rotating inner tube 14th screwed and has a receiving space S. on. The airflow connector 152 has a first spiral air guide slot 1521 , a second spiral air duct slot 1522 , a central through hole 1523 and a side air injection hole 1524 on. The airflow connector 152 is located inside the recording room S. and is in the spray head sleeve 151 attached. The first spiral air duct 1521 and the second spiral air guide slot 1522 also form a first spiral air duct SA1 and a second spiral air duct SA2 with the inner wall of the spray head sleeve 151 . The first spiral air duct 1521 and the second spiral air guide slot 1522 are arranged oppositely with respect to the X axis. Therefore, the first spiral air duct extend SA1 and the second spiral air duct SA2 also spirally with respect to the axis X.

The central through hole 1523 extends along the X axis. The side air injection hole 1524 communicates with the second spiral air duct 1522 and extends along a beam direction D1 that intersects the X axis.

The connecting sleeve 16 is with the second end portion 112 the fixed sleeve 11 connected and communicates with the rotating inner tube 14th . The connecting sleeve 16 is with a guide tube connection hole 161 and four connecting holes 162 Mistake. In the drawing there is only one of the guide tube connection holes 161 labeled. The four connecting holes 162 are evenly around the guide tube connecting hole 161 arranged.

The guide tube 17th is with the guide tube connecting hole 161 the connecting sleeve 16 screwed and communicates with the connecting sleeve 16 . The guide tube 17th extends further through the rotating inner tube 14th along the X axis to the central through hole 1523 . The guide tube 17th limited in the rotating inner tube 14th an external air flow channel AF1 , the one with the connecting sleeve 16 , the first spiral air duct SA1 and the second spiral air duct SA2 communicates.

The protective sleeve 18th is releasable with the first end portion 111 the fixed sleeve 11 screwed to the rotating spray head 15th protect against impact. At the opening of the protective sleeve 18th is the bristle element 19th releasably attached with which the user can wash the surface of an object.

The gas-liquid supply unit 2 has a spray gun 21st and a liquid supply device 22nd on. The spray gun 21st has a handle portion 211 and a run section 212 . The handle section 211 is used to connect to a high pressure gas source [not shown], the barrel section 212 with the handle section 211 and the connecting sleeve 16 and used to supply a flow of compressed air [not shown] provided by the high pressure gas source to the guide tube 17th to deliver.

The fluid supply device 22nd is with the spray gun 21st releasably connected and has a liquid supply pipe 221 and a liquid receiving tube 222 on. The liquid supply pipe 221 is in the guide tube 17th inserted and extends to the central through hole 1523 . The liquid supply pipe 221 limited in the guide tube 17th an internal air flow channel AF2 , the one with the connecting sleeve 16 and the central through hole 1523 communicates. The liquid supply pipe 221 also has a liquid supply channel AF3 which is used to deliver a liquid [not shown]. The liquid pick-up tube 222 communicates with the liquid supply pipe 221 and a liquid storage container [not labeled] of the liquid supply device 22nd so that the liquid in the liquid storage container through the liquid receiving tube 222 to the liquid supply pipe 221 can be delivered.

After the spray gun 21st provided compressed air flow into the guide tube 17th the compressed air stream flows to the external air flow channel AF1 or to the internal air flow channel AF2 so that the compressed air flow through the external air flow channel AF1 directly to the first spiral air duct SA1 and the second Spiral air duct SA2 flows. The first spiral air duct SA1 and the second spiral air duct SA2 extend spirally around the axis X. Therefore, when the compressed air flow through the first spiral air duct SA1 and the second spiral air duct SA2 flows, the rotating spray head becomes 15th driven to rotate. In addition, the compressed air flow through the second spiral air duct SA2 flows, a side air flow [not shown] from the side air injection hole 1524 pushed out. On the other hand, when the compressed air flow through the internal air flow channel AF2 from the central through hole 1523 is ejected, the liquid becomes in the liquid supply channel AF3 ejected along the X axis due to the Venturi effect. As a result, the side air flow coming from the side air injection hole becomes 1524 is discharged to the liquid discharged from the liquid supply channel AF3 is ejected because the beam direction D1 of the lateral air flow intersects the X axis. In this way the direction of spraying of the liquid is changed. At this point, the out of the fluid supply channel AF3 ejected liquid rotatably from the rotating spray head 15th sprayed out as the rotating spray head 15th rotates in a rotating state.

Compared to the prior art, in which a bending tube is used to rotatably spray out the liquid, the bending tube being more complicated to manufacture or assemble and being easily deformed by the impact of external forces, the first spiral air guide slot according to the invention 1521 and the second spiral air guide slot 1522 of the airflow connector 152 with the spray head sleeve 151 a first spiral air duct SA1 or second spiral air duct SA2 so that the rotating spray head 15th can be driven by the spiral structure when the compressed air flow through the first spiral air duct SA1 and the second spiral air duct SA2 flows. This is also made possible with the second spiral air duct 1522 communicating side air injection hole 1524 it is that the compressed air flow is ejected obliquely in the direction of the axis, thereby reducing the jet direction of the liquid emerging from the central through hole 1523 is ejected, is changed and thus a rotating spray effect is generated. According to the present invention, since no bending tube is required to produce a rotating syringe effect, according to the present invention, not only can the manufacturing steps be effectively simplified and costs reduced, but also the stability and durability can be effectively improved due to the stable structure.

According to the invention, a guide tube is also used 17th used by the rotating inner tube 14th goes through it and turns to the central through hole 1523 of the airflow connector 152 extends so that the guide tube 17th in the rotating inner tube 14th an external air flow channel AF1 limited. So that the can in the connecting sleeve 16 flowing compressed air stream directly through the external air flow channel AF1 to the first spiral air duct SA1 and the second spiral air duct SA2 reach. This also limits the guide tube 17th located liquid supply pipe 221 in the guide tube 17th an internal air flow channel AF2 so that the into the connecting sleeve 16 flowing compressed air stream directly through the internal air flow channel AF2 to the central through hole 1523 can arrive. Then the liquid is in the liquid supply pipe 221 splashed out. Due to the design of the external air flow channel AF1 and the internal air flow channel AF2 it is possible to effectively prevent the pressure of the compressed air flow from being impaired due to the incomplete internal structure. Therefore, the injection force of liquid is further increased.

The foregoing description illustrates the exemplary embodiments of the invention and is not intended to limit the claims. All equivalent changes and modifications that can be made by one skilled in the art in accordance with the description and drawings of the invention belong to the scope of the present invention.

List of reference symbols

100

Air-conducting rotary spray device with an internal and an external air flow channel

1

air-conducting rotary injection unit

11

fixed sleeve

111

first end section

112

second end section

12

camp

121

Bearing outer ring

122

Bearing inner ring

13

Separation pipe

14th

rotating inner tube

15th

rotating spray head

151

Spray head sleeve

152

Airflow connector

1521

first spiral air duct

1522

second spiral air duct

1523

central through hole

1524

side air injection hole

16

Connecting sleeve

161

Guide tube connection hole

162

Connecting hole

17th

Guide tube

18th

Protective sleeve

19th

Bristle element

2

Gas-liquid supply unit

21st

Spray gun

211

Handle section

212

Running section

22nd

Fluid supply device

221

Liquid supply pipe

222

Liquid pick-up tube

AF1

external air flow channel

AF2

internal air flow channel

AF3

Fluid supply channel

SA1

first spiral air duct

SA2

second spiral air duct

S.

Recording room

X

axis

D1

Beam direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• TW M441519 [0003]

Claims (4)

Air-conducting rotary spray device with an internal and an external air flow channel, comprising: an air-conducting rotary injection unit (1), with: a fixed sleeve (11); a rotating inner tube (14) which is rotatably arranged about an axis (X) in the fixed sleeve (11); and a rotating spray head (15), with: a spray head sleeve (151) which is connected to the rotating inner tube (14) and has a receiving space (S); and an air flow plug (152) which is located in the receiving space (S) and is fastened in the spray head sleeve (151), the air flow plug (152) having a first spiral air guide slot (1521), a second spiral air guide slot (1522), a central through hole (1523) and a lateral air injection hole (1524), wherein the first spiral air guide slot (1521) delimits a first spiral air guide channel (SA1) in cooperation with the inner wall of the spray head sleeve (151), and wherein the second spiral air guide slot (1522) is arranged symmetrically to the first spiral air guide slot (1521) is and in cooperation with the inner wall of the spray head sleeve (151) delimits a second spiral air duct (SA2), and wherein the central through hole (1523) extends along the axis (X), and wherein the side air injection hole (1524) extends along one of the axis (X) intersecting jet direction (D1) and with the second spiral air guide slot (1522) ko mmunicated; a connecting sleeve (16) connected to the fixed sleeve (11) and communicating with the rotating inner tube (14); and a guide tube (17) which is fastened in the connecting sleeve (16) and extends along the axis (X) through the rotating inner tube (14) to the central through hole (1523), the guide tube (17) in the rotating inner tube ( 14) delimits an external air flow channel (AF1) which communicates with the connecting sleeve (16), the first spiral air duct (SA1) and the second spiral air duct (SA2); and a gas-liquid supply unit (2), with: a spray gun (21) connected to the connecting sleeve (16) and used to deliver a flow of compressed air into the guide tube (17); and a liquid supply device (22) connected to the spray gun (21) and having a liquid supply pipe (221) inserted in the guide pipe (17) and extending to the central through hole (1523) for supplying a liquid, wherein the liquid supply pipe (221) in the guide tube (17) delimits an internal air flow channel (AF2) which communicates with the connecting sleeve (16) and the central through hole (1523), the compressed air flow through the guide tube (17) to the external air flow channel (AF1) and to the internal air flow channel (AF2) flows in such a way that the compressed air flow through the external air flow channel (AF1) reaches the first spiral air duct (SA1) and the second spiral air duct (SA2) in order to set the rotating spray head (15) in rotation and at the same time lateral air flow from the side air injection hole (1524), and wherein when the compressed air flow through the internal Lu ft flow channel (AF2) is ejected from the central through hole (1523), the liquid in the liquid supply pipe (221) is ejected along the axis (X), and the lateral air flow is used to determine the direction of the spray of the liquid injected along the axis (X) to change so that the liquid can be rotatably sprayed out of the rotating spray head (15). Rotary sprayer after Claim 1 , characterized in that the air-conducting rotary injection unit (1) further has a bearing (12) which has an outer bearing ring (121) and an inner bearing ring (122), the outer bearing ring (121) being attached to the inner wall of the fixed sleeve (11) , while the bearing inner ring (122) is rotatably supported in the bearing outer ring (121) and is mounted on the rotating inner tube (14). Air-conducting rotary spray unit connected to the gas-liquid supply unit (2), the gas-liquid supply unit (2) comprising a spray gun (21) and a liquid supply device (22), and wherein the spray gun (21) is used, for supplying a compressed air stream, and wherein the liquid supply device (22) comprises a liquid supply tube (221) for supplying a liquid, and wherein the air-directing rotary injection unit (1) comprises: an air-directing rotary injection unit (1) comprising: a solid sleeve (11) ; a rotating inner tube (14) rotatably disposed about an axis (X) in the fixed sleeve (11); and a rotating spray head (15), comprising: a spray head sleeve (151) which is connected to the rotating inner tube (14) and has a receiving space (S); and an air flow plug (152) which is located in the receiving space (S) and is fastened in the spray head sleeve (151), the air flow plug (152) having a first spiral air guide slot (1521), a second spiral air guide slot (1522), a central through hole (1523) ) and a lateral air injection hole (1524), wherein the first spiral air guide slot (1521) in cooperation with the inner wall of the spray head sleeve (151) delimits a first spiral air duct (SA1), and the second spiral air guide slot (1522) to the first Spiral air guide slot (1521) is arranged symmetrically and, in cooperation with the inner wall of the spray head sleeve (151), delimits a second spiral air guide channel (SA2), and wherein the central through hole (1523) extends along the axis (X), and wherein the side air injection hole ( 1524) extends along a beam direction (D1) intersecting the axis (X) and communicates with the second spiral air guide slot (1522); a connecting sleeve (16) connected to the fixed sleeve (11) and communicating with the rotating inner tube (14); and a guide tube (17) which is fastened in the connecting sleeve (16) and extends along the axis (X) through the rotating inner tube (14) to the central through hole (1523), the guide tube (17) in the rotating inner tube (14) delimits an external air flow channel (AF1) which communicates with the connecting sleeve (16), the first spiral air duct (SA1) and the second spiral air duct (SA2), and wherein the liquid supply pipe (221) in the guide pipe (17) has an internal air flow duct ( AF2) that communicates with the connecting sleeve (16) and the central through hole (1523), the compressed air flow through the guide tube (17) to the external air flow channel (AF1) and to the internal air flow channel (AF2) so that the compressed air flow through the external air flow channel (AF1) passes directly to the first spiral air duct (SA1) and the second spiral air duct (SA2) to the rotating spray head (15 ) in rotation and at the same time ejecting a side air flow from the side air injection hole (1524), and wherein, when the compressed air flow is discharged through the internal air flow channel (AF2) from the central through hole (1523), the liquid along the liquid supply pipe (221) of the axis (X), and wherein the side air flow is used to change the direction of the spray of the liquid sprayed along the axis (X) so that the liquid can be rotatably sprayed out of the rotating spray head (15). Rotary injection unit after Claim 3 , further with a bearing (12) which has an outer bearing ring (121) and an inner bearing ring (122), the outer bearing ring (121) being attached to the inner wall of the fixed sleeve (11), while the inner bearing ring (122) is rotatable in the Bearing outer ring (121) is stored and mounted on the rotating inner tube (14).

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