Spray head structure

Abstract

The subject matter is a nozzle assembly for spraying air and liquid at high velocity, including an airflow tube, a rotating unit, a load element, a spray element, a jet nozzle, and a liquid flow tube. The airflow tube has an airflow channel. The rotatable rotating unit is mounted on the airflow tube. The load element is mounted on the rotating unit to increase the load and torque of the rotating unit. The spray element is inserted into the rotating unit. The jet nozzle is attached to the rotating unit and has a jet channel that connects to the airflow tube. The jet nozzle has an outlet end and an injection channel located at an acute angle to the axis of the airflow tube.Air is sprayed at a high flow rate towards the outlet, so that the jet tube drives the rotating unit, causing it to turn towards the airflow tube and thus drive the spray element, which in turn rotates to generate the airflow. This allows the airflow to flow from the spray element to the outlet, increasing the atomization effect, or from the outlet to the spray element, enhancing the atomization effect.

Description

[Chinese name of the utility model] Nozzle design [Chinese version]

[0001] The subject matter is a nozzle construction for spraying air and liquid at high velocity, including an air flow tube, a rotating unit, a load element, a fan element, a jet tube, and a liquid flow tube. The air flow tube has an air flow channel. The rotatable rotating unit is mounted on the air flow tube. The load element is mounted on the rotating unit to increase the load and torque of the rotating unit. The fan element is inserted into the rotating unit. The jet tube is attached to the rotating unit and has a jet channel that is connected to the air flow tube. The jet tube has an outlet end and an injection channel that is at an acute angle to the axis of the air flow tube.The air is sprayed toward the outlet end at a high flow rate, so the jet tube drives the rotating unit to rotate toward the airflow tube and drives the fan element to rotate to generate airflow. This allows the airflow to flow from the fan element to the outlet end to increase the atomization effect or from the outlet end to the fan element to absorb contaminants. [Given Figure] Figure 1 [Brief description of the symbols in the given figure]

[0002] 1Nozzle structure 2Cleaning agent 10Air flow tube 11Air flow channel 12Inlet end 13Outlet end 14Annular side wall 141Through hole 20Air compressor 30Rotation unit 31First end 32Second end 33Passage 34Male part 35Mounting section 36Extension 40Jet pipe 41Jet channel 411Outlet end 412Connection end 42Bent pipe body 43Combined pipe body 50Liquid flow tube 51Liquid inlet 52Liquid outlet 60Liquid storage tank 70Load element 80Stop part 90Nozzle shield 91Third end 92Fourth end 93Nozzle opening 94Flow opening 100 Fan element 110 Mounting element 1101 Air inlet 120 Air hood 1201 Air duct 1202 Air outlet W1, W2 Outer diameter [Name of the utility model] Nozzle construction [Technical Area]

[0003] This invention relates to a nozzle construction. [State of the art]

[0004] Document DE 20 2013 101 261 U1 discloses a nozzle design with a fan element, but without a load element. DE 20 2013 101 264 U1 discloses a rotary spray head component with a load element, which is used for spraying high-velocity air and a liquid.

[0005] With the improvement of the quality of life in terms of clothing, food, housing, and entertainment, modes of transport have also evolved from bicycles and motorcycles to motor vehicles and recreational vehicles. As a result of operating such vehicles on the road, they inevitably become soiled with sand and dust. Therefore, after a few trips, the vehicle should be cleaned and sprayed down to keep the body clean, which is why many car owners take their vehicles to a car wash for leisure. When cleaning the body, the manufacturer uses a foam-impregnated cleaning agent to brush the body, and the foam is then rinsed off by a water jet from a water lance.However, during cleaning, the pressure of the water jet from the water lance is often insufficient, so that the dust on the body is not easy to remove and stains of dust and sand remain after cleaning the vehicle.

[0006] Therefore, some manufacturers have developed pressure spray guns or air spray guns to enhance the cleaning effect of the pressure spray gun or air spray gun by using high-pressure air. The pressure spray gun or air spray gun is connected to a handle, a fluid cylinder, and a nozzle via a T-piece, and the bottom of the handle is connected to an air compressor via a hose. To create the so-called Venturi effect, the handle directs high-pressure air from the air compressor into the T-piece, forcing the fluid out of the fluid cylinder and then spraying it out through the nozzle.

[0007] However, the pressure spray gun or air spray gun only has a small spray area. If a user wants to quickly perform a large-area cleaning using the pressure spray gun or air spray gun, it is easy to skip part of the area to be cleaned due to the rapid rinsing process, leaving that area uncleaned. As a result, it takes a lot of time for the user to repeatedly clean the same area until an optimal cleaning effect is achieved. Therefore, the developers now had to solve the question of how to improve the overall cleaning power of the pressure spray gun. [Content of the utility model]

[0008] The present invention represents a nozzle construction according to claim 1, which solves the underlying technical problem of insufficient general cleaning power in the air spray gun.

[0009] One example of the present disclosure relates to a nozzle structure for spraying high-flow air and liquid, comprising an air flow tube, a rotating unit, a load element, a fan element, a jet tube, and a liquid flow tube. The air flow tube has an air flow channel in which the high-flow air circulates. The rotatable rotating unit is attached to the air flow tube. The load element is mounted on the rotating element to increase the weight of the rotating unit and its torque. The fan element is fixed to the rotating unit. The jet tube is attached to the rotating unit, which has a jet channel and is connected to the air flow tube. The air flow channel is connected to the jet channel. The jet channel has an outlet end and, at the outlet end, a jet channel.The jet channel and the axis of the air flow tube are at an acute angle to each other. The liquid flow tube has a corresponding liquid inlet end and a liquid outlet end. The liquid inlet end is located outside the air flow tube, and the liquid outlet end enters the air flow channel through the air flow tube. The air flow channel extends to the outlet end of the jet channel. The liquid exits from the liquid outlet end and is mixed with high-flow air to atomize. The high-flow air is sprayed from the air flow channel toward the outlet end, causing the outlet end to rotate relative to the axis due to the eccentric force from the jet tube. As the rotating unit rotates, the fan element also rotates, forming an airflow. The outlet end is located in the flow path of the airflow.

[0010] According to the nozzle design as shown in the example above, the fan element and the load element are installed together on the rotating unit, and the fan element and load element are driven to rotate as the high-flow air flows through the jet pipe. The rotating fan element generates an airflow, which flows from the fan element to the outlet end to enhance the atomizing effect of the high-flow liquid and air, or flows from the outlet end to the fan element to absorb the contaminants adjacent to the outlet end. In addition, the load element increases the load of the rotating unit, thereby increasing the rotating unit's torque. In this way, the arrangement of the fan element and the load element can further improve the overall cleaning power of the nozzle design.

[0011] The above description of the present invention and the following description of the embodiments are presented to illustrate the principles of the present invention and to further demonstrate the scope of the patent application. [Brief description of the illustrations]

[0012] Figure 1Cross-sectional exploded view of the nozzle construction as implemented in the first example of the present disclosure Figure 2Functional diagram of the Figure 1 Figure 3 Functional diagram of the nozzle construction as implemented in the second example of the present disclosure Figure 4 Functional diagram of the nozzle construction as implemented in the third example of the present disclosure [Embodiment]

[0013] See Figure 1 and 2 . Figure 1is a sectional exploded view of the nozzle construction as embodied in the first example of the present disclosure not belonging to the invention. Figure 2 is a functional diagram of the nozzle design of Figure 1 .

[0014] The nozzle assembly 1 of the unclaimed embodiment is used for spraying atomized air and liquid at high velocity. Nozzle assembly 1 can be used, for example, in a cleaning spray gun for cleaning a car body. Nozzle assembly 1 comprises an air flow tube 10, an air compressor 20, a rotation unit 30, a jet tube 40, a liquid flow tube 50, a liquid storage tank 60, and a load element 70.

[0015] The air flow tube 10 has an air passage 11, and the opposite ends of the air flow tube 10 have an air inlet end 12 and an air outlet end 13, respectively. The inlet end 12 is connected to an air compressor 20, which is used to ensure a high air flow rate.

[0016] The rotatable rotation unit 30 is attached to the air flow tube 10. More specifically, the rotation unit 30 has a first end 31 and a second end 32, and the rotation unit 30 has a passage 33 extending from the first end 31 to the second end 32. The first end 31 is rotatably mounted on the air flow tube 10 such that a portion of the air flow tube 10 is located within the passage 33.

[0017] The jet pipe 40 is attached to the rotating unit 30, and the jet pipe 40 has a jet channel 41. A portion of the jet pipe 40 is in contact with the air flow pipe 10, and the air flow channel 11 enables some communication with the jet 41. More specifically, the jet channel has an outlet end 411 and a connecting end 412 opposite each other. By connecting the connecting end 412 to the air outlet 13, the jet channel 41 and the air flow channel 11 are connected to each other. The high-flow air supplied by the air compressor 20 can flow sequentially from the inlet end 12 through the air flow channel 11 and the jet channel 41 and be discharged from the outlet end 411 of the jet channel 41. More specifically, the jet pipe 40 includes a bent pipe body 42 and a combined tube body 43, and the jet channel 41 extends through the bent pipe body 42 and the combined tube body 43.The outlet end 411 is located close to one end of the bent tube body 42 and away from the connecting tube body 43, and the connecting end 412 is located close to one end of the connecting tube body 43 and away from the bent tube body 42. The connecting tube body 43 is to be connected to the air flow tube 10. The outlet end 411 and the connecting end 412 are not coaxially connected, so that the discharge path A is at an acute angle θ to the axis P of the air flow tube 10 when the air is discharged from the outlet end 411 at a high flow rate.

[0018] At the time of ejection, when the high-flow air flows through the jet channel 41 to the outlet end 411, the high-flow air simultaneously generates a reaction force on the outlet end 411. Since the outlet end 411 is not located on the axis P and the ejection path A is not parallel to the axis P, when the reaction force acts on the outlet end 411, the outlet end 411 is in an eccentrically loaded state, so the jet 40 drives the rotating member 30 to rotate together. When the high-flow air is ejected from the outlet end 411, the ejection path A is at an acute angle θ to the axis P of the air flow tube 10, and the outlet end 411 is moved circularly around the axis P during the rotation of the jet 40.

[0019] The liquid flow tube 50 has an opposite liquid inlet end 51 and a liquid outlet end 52. The liquid outlet end 52 is located outside the air flow tube 10, and the liquid inlet end 51 is located in the liquid storage tank 60. Furthermore, the air flow tube 10 has an annular side wall 14 forming an air flow channel 11, and the annular side wall 14 has a through hole 141 communicating with the air flow channel 11. More specifically, the flow tube 50 enters the air flow channel 11 through the through hole 141, and the liquid flow tube 50 extends toward the outlet end 411 of the jet 41, so that the liquid outlet end 52 is located outside the air flow tube 10. The liquid storage tank 60 stores a cleaning liquid 2 such as water, soap liquid, cleaning liquid, etc., and the liquid flow tube 50 draws the cleaning liquid 2 through the liquid inlet end 51. In addition, the shower structure 1 further includes a stopper part 80 arranged at the through hole 141 to seal the resulting gap between the liquid flow tube 50 and the through hole 141 and to prevent the air in the air flow channel 11 from leaking through the gap.

[0020] The load element 70 is, for example, a compression spring; the load element 70 is attached to the second end of the rotating unit 30 and covers the jet pipe 40 to increase the load of the rotating unit 30 and thereby, in turn, increase the torque of the rotating element 30. The arrangement in the present embodiment, in which a compression spring serves as the load element 70, is not intended to limit the present invention. In other embodiments, other components, such as belts, may be used.

[0021] In the present embodiment, the nozzle structure 1 also comprises a nozzle shield 90. The nozzle shield 90 has a third end 91, a fourth end 92, and a nozzle opening 93. The third end 91 and the fourth end 92 are located on opposite sides of the nozzle shield 90, and the nozzle opening 93 is located at the fourth end 92, and the opening outer diameter W1 of the third end 91 of the nozzle shield 90 is smaller than the opening diameter W2 of the fourth end 92. The nozzle shield 90 is enclosed by the third end 91 at the air outlet end 13 of the air flow tube 10 such that the rotating element 30, the jet tube 40, and the load element 70 are all located within the nozzle shield 90. The outlet end 411 of the jet tube 40 corresponds to the nozzle opening 93.Furthermore, while the outlet end 411 of the jet pipe 40 rotates about the axis P, the maximum rotation diameter of the outlet end 411 is smaller than the diameter of the nozzle opening 93, so that the outlet end 411 does not interfere with the nozzle opening 93 and the jet pipe 40 can rotate smoothly. Furthermore, the nozzle shield 90 also protects the jet pipe 40 from damage caused by external forces.

[0022] When the high flow rate air sequentially enters the air flow path 11 and the jet channel 41 through the inlet end 12 and passes through the liquid outlet end 52 of the liquid flow pipe 50 through the jet channel 41, a Venturi effect is generated at the liquid outlet end 52 of the liquid flow pipe 50 in the jet channel 41, so that the pressure at the liquid outlet end 52 is smaller than the pressure at the liquid inlet 51. As a result, the cleaning liquid 2 in the liquid storage tank 60 is sucked from the liquid inlet end 51 to the liquid outlet end 52 due to the influence of the pressure difference between the liquid outlet end 52 and the liquid inlet end 51 and then flows out.Next, the cleaning liquid 2 discharged from the liquid outlet end 52 is mixed with the high-flow air in the jet 41 to be nebulized, and then jetted from the outlet end with the high-flow air 411. While the cleaning liquid 2 and the high-flow air are jetted from the outlet end 411, the outlet end 411 is rotated about the axis P, so that the washing water jet mixed with air and liquid is continuously jetted in a swirling shape. Therefore, the spray area of ​​the nozzle structure 1 can be enlarged by the swirling spray water jet to expand the cleaning area. On the other hand, the nozzle shield 90 limits the spray area of ​​the outlet end 411 to prevent the spray area of ​​the washing water jet from becoming excessively large and uncontrolled, which could interfere with the user's work.

[0023] In addition, since the load element 70 is mounted on the rotating element 30, the load of the rotating element 30 is increased to in turn increase the torque of the rotating element 30, so that the overall cleaning power of the nozzle structure 1 can be improved. For details, please refer to the table below. The following table compares the water supply by the nozzle structure 1 in the present embodiment with the nozzle structure 1 without the load element 70, with air volume, number of revolutions without water supply, number of revolutions, and water consumption time for the same water volume. Therefore, it can be seen that the nozzle structure 1 of the present embodiment has better performance in terms of the number of revolutions without water supply, the number of revolutions with water supply, and water consumption time compared to the nozzle structure 1 without the load element 70.Therefore, the load element 70 is able to improve the overall cleaning power of the nozzle construction 1. Rotating nozzle design with load element Rotating nozzle design without load element Water tank capacity (ml) 600 600 Air flow (liters / min) 125 102 Number of revolutions without water supply (rpm) 4100 6600 Number of revolutions with water supply (rpm) 3900 6300 Water consumption time 12 minutes 49 seconds 4 minutes 37 seconds

[0024] In addition, the nozzle structure 1 of the exemplary embodiment also comprises a fan element 100, a combination element 110, and an air hood 120. The rotation unit 30 comprises, on the outer surface, a plug-in part 34, a mounting portion 35, and an extension 36, which are connected to one another. The mounting portion 35 of the rotation unit 30 is located between the plug-in part 34 and the extension 36. The first end 31 is located at the end where the plug-in part 34 is remote from the mounting portion 35, and the second end 32 is located at the end where the extension 36 is remote from the mounting portion 35. The plug-in part 34 of the rotation unit 30 is sheathed on the air flow tube 10. The load element 70 and the fan element 100 are coaxial and are attached to the extension 36 and the mounting portion 35, respectively.

[0025] In addition, the nozzle shield 90 also has a flow opening 94 between the third end 91 and the fourth end 92. The combination element 110 is sheathed on the air flow tube 10 and has an air inlet 1101, and the air inlet 1110 corresponds to the flow opening 94. The air hood 120 is located in the nozzle shield 90 and has an air duct 1201 and an air outlet 1202 connecting to the air duct 1201. The air hood 120 is sheathed on the air flow tube 10 opposite one end of the air outlet 1202. More specifically, the air hood 120 is mounted on the combination element 110 opposite one end of the air outlet 1202 to be sheathed on the air flow tube 10. The combined tube body 43 of the jet pipe 40, the fan element 100, the rotating element 30 and the load element 70 are arranged within the air duct 1201 of the air hood 120.

[0026] As in Figure 2As shown, in the unclaimed embodiment, during the rotation of the rotating element 30, the fan element 100 is also rotated, so that an air flow passes through the opening 94, enters the air hood 120 through the air inlet 1101, and exits from the air duct 120 along the first direction D1 via the air duct 1201 and the air outlet 1202. Since the air hood 120 has an air collection effect, the air flow can further improve the mixing and atomization degree of the high-flow air and the cleaning liquid 2, thereby improving the overall cleaning power of the nozzle structure 1. Furthermore, the air hood 120 not only ensures the air collection effect but also ensures that the load element 70 does not wobble excessively during rotation.

[0027] In this embodiment, the air flow generated by the fan element 100 flows from the air inlet 1101 to the air outlet 1202 along the first direction D1. However, it is not limited thereto, see Figure 3. Figure 3 is a schematic view showing the operation of the nozzle structure according to the second embodiment of the present invention. In the present embodiment, the direction of the air flow generated by the fan element 100' is opposite to the fan element 100 in the Figure 1Conversely. Specifically, the rotation unit 30' drives the fan element 100' to rotate, then an air flow from the air outlet 1202' enters the air hood 120', and then the air flow flows through the air duct 1201', the air inlet 1101', and the opening 94' along the second direction D2 and exits the nozzle shield 90'. Since the air hood 120' has an air collection effect, the ability of the nozzle structure 1' to absorb the contaminants near the exit end 411' of the jet 41' can be further increased, thereby improving the overall cleaning power of the nozzle structure 1'.

[0028] In the above embodiment, the load element and the fan element are used to improve the overall cleaning power of the nozzle construction, but it is not limited to this, see Figure 4. Figure 4is a schematic view showing the operation of the nozzle structure according to one embodiment of the present invention.

[0029] The nozzle construction 1" of this embodiment of the invention also comprises a torque control element 130". The torque control element 130" is, for example, a brush construction. The torque control element 130" is arranged on the combination element 110" and in the air duct 1201" of the air hood 120". The torque control element 130" contacts the rotation element 30". The other detailed components of the nozzle construction 1" are similar to the detailed components of the nozzle construction 1 of the embodiment in the Figure 1 and are therefore not described again.

[0030] In this embodiment, as the rotating element 30" rotates to drive the torque control element 130", the torque control element 130" creates a resistance on the rotating unit 30", so that the torque of the rotating unit 30" increases. This further improves the overall cleaning power of the nozzle structure 1".

[0031] According to the nozzle structure of the above embodiment, air flows through the jet pipe at a high flow rate, and the fan element and the load element are simultaneously driven to rotate because the fan element and the load element are installed together on the rotating unit. At this time, the rotating fan element generates an airflow. The airflow flows from the fan element to the outlet end, thus increasing the atomizing effect of the high-flow rate mixture of liquid and air. Alternatively, the airflow flows from the outlet end toward the fan element to absorb contaminants near the outlet end. In addition, the load element increases the load of the rotating unit, thus increasing the torque of the rotating element. In this way, the arrangement of the fan element and the load element can further improve the overall cleaning power of the nozzle structure.

[0032] In addition, the arrangement of the torque control element provided on the combination element can increase the torque of the rotating unit, thereby further improving the overall cleaning power of the nozzle design.

[0033] Although the present invention has been defined by the present preferred embodiments, the present invention is not intended to be limited thereby. Anyone familiar with similar technologies may make some modifications and refinements without departing from the claims of this patent. Therefore, the scope of the present invention is based on the definition of the claims appended to this specification. [Symbol description]

[0034] 1, 1', 1"Nozzle Construction 2Cleaning Agent 10Air Flow Tube 11Air Flow Channel 12Inlet End 13Outlet End 14Annular Sidewall 141Through Bore 20Air Compressor 30, 30'Rotation Unit 31First End 32Second End 33Passage 34Male Part 35Mounting Section 36Extension 40Jet Tube 41, 41'Jet Channel 411, 411'Outlet End 412Binding End 42Bent Tube Body 43Combined Tube Body 50Liquid Flow Tube 51Liquid Inlet 52Liquid Outlet 60Liquid Storage Tank 70Loading Parts 80Stop Part 90, 90'Nozzle Shield 91Third End 92 Fourth End 93 Nozzle Opening 94, 94' Flow Opening 100, 100' Fan Element 110, 110" Combination Element 1101, 1101' Air Inlet 120, 120', 120" Air Hood 1201, 1201', 1201" Air Duct 1202, 1202' Air Outlet 130" Torque Control Element A Discharge Path PAxis Θ Acute Angle W1, W2 Outer Diameter D1, D2 Direction

Claims

1. A nozzle construction (1) for spraying of air having a high-flow rate and a liquid, comprising: - an air flow tube (10) with an air flow channel (11) for the flow of the air at a high flow rate; - a rotating rotation unit (30) which partially encases the air flow tube (10); - a load member (70) located at the rotation unit (30) to increase the load of the rotation unit (30) and thereby increase the torque of the rotation unit (30); - a fan element (100) mounted on the rotation unit (30); - a jet tube (40) attached to the rotation unit (30) having a jet duct (41), wherein the jet tube (40) is connected to the air flow tube (10) and the air flow duct (11) is connected to the jet duct (41), wherein the nozzle (41) has an outlet end (411) having an outlet end (411) having an ejection path (A) that is at an acute angle to an axis (P) of the air flow tube (10); and a liquid flow tube (50) having a liquid inlet end (51) and a liquid outlet end (52) opposite each other, wherein the liquid inlet end (51) is located outside the air flow tube (10) and the liquid outlet end (52) is arranged through the air flow tube (10) to the air flow channel (11) extending to the outlet end (411) of the jet channel (41) to spray the liquid from the liquid outlet end (52) and to nebulize the liquid to mix with high-flow air, wherein the nozzle construction is adapted to spray the high-flow air from the airflow channel (11) towards the outlet end (411), so that the outlet end (411) rotates to the axis (P) due to an eccentric force on the jet tube (40), wherein while the rotation unit (30) rotates, the fan element (100) is also rotated, to form an air flow, wherein the outlet end (411) is in a flow path of the air flow, furthermore, comprising an air duct (120) comprising an air duct (1201) and an air outlet (1202) connected to the air duct (1201), wherein the air duct (120) encases the air flow tube (10) opposite one end of the air outlet (1202), and wherein part of the jet tube (40), the fan element (100), the rotation unit (30) and the load member (70) are arranged within the air duct (1201) of the air duct (120), furthermore, comprising a combination member (110) which sheaths the air flow tube (10), wherein the air hood (120) is mounted to the combination member (110) opposite the end of the air outlet (1202), and wherein the combination member (110) has an air inlet (1101) so that the air flow can flow from the air inlet (1101) to the air outlet (1202), furthermore comprising a torque control element (130") which is located on the combination member (110) and is located in the air duct (1201) of the air hood (120), where the torque control element (130") touches the rotation unit (30), wherein the rotation unit (30) has a first end (31) and a second end (32) opposite each other, and the rotation unit (30) has a passage (33) extending from the first end (31) to the second end (32), wherein the first end (31) is rotatable on the air flow tube (10), so that a portion of the air flow tube (10) and a portion of the jet tube (40) are within the passage (33), and wherein the outlet end (411) of the jet tube (40) is outside the passage (33), wherein the load member (70) is located on one side where the fan element (100) is located from the first end (31) and wherein the load member (70) encases the jet tube (40), wherein the load member is a compression spring and wherein the load member (70) and the fan element (100) are arranged coaxially on the rotation unit (30).

2. Nozzle construction according to claim 1, further comprising a nozzle screen (90) having a nozzle opening (93), wherein the nozzle screen (90) is encased at the air flow tube (10) opposite one end of the nozzle opening (93), wherein the air hood (120) is located within the nozzle screen (90), and wherein the outlet end (411) corresponds to the nozzle opening (93).

3. Nozzle construction according to claim 1, wherein the jet tube (40) comprises a bent tube body (42) and a combined tube body (43) which are connected to each other, wherein the outlet end (411) is located on the bent tube body (42), and wherein the combined tube body (43) is connected to the air flow tube (1).

4. Nozzle construction according to claim 1, further comprising an air compressor (20), wherein the air flow tube (10) has an air intake end (12) and an air outlet end (13) opposite each other, and wherein the air intake end (12) is connected to the air compressor (20) and the air outlet end (13) to the jet tube (40).

5. Nozzle construction according to claim 1, further comprising a liquid storage tank (60), wherein the liquid inlet end (51) of the liquid flow tube (50) is located within the liquid storage tank (60).

6. The nozzle construction according to claim 1, wherein the air flow tube (10) has a ring-shaped side wall (14) forming the air flow channel (11) and having a through hole (141), wherein the liquid flow tube (50) passes through the through hole (141).

7. Nozzle construction according to claim 6, further comprising a stop part (80) which is arranged at the through hole (141), wherein the liquid flow tube (50) passes through the stop part (80).

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