Paint spraying gun
By using an air fine-tuning gauge with a long-hole structure in the paint spray gun, the problems of pressure loss and nonlinear regulation in compressed air flow are solved, resulting in lower pressure loss and higher operating efficiency, and ensuring the accuracy of pressure regulation.
Patent Information
- Application Number
- CN202480048005.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-14
- Filing Date
- 2024-12-17
- Publication Date
- 2026-02-13
AI Technical Summary
Existing paint spray guns suffer from high pressure loss and non-linear adjustment issues during compressed air flow, resulting in pressure measurement errors and low operating efficiency.
An air fine-tuning gauge with an elongated orifice structure is used to regulate the flow of compressed air through a closed mechanism such as a sleeve, ensuring that the opening area in the flow channel is open within a constant width range, reducing airflow separation, and achieving linear regulation.
It reduces pressure loss, improves the accuracy of pressure measurement and the operating efficiency of the paint gun, and achieves more precise pressure regulation and lower flow loss.
Smart Images
Figure CN121532583A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a paint spray gun, an application of an air fine-tuning gauge, and an air fine-tuning gauge, which respectively have low pressure loss and an efficient operating mode. Background Technology
[0002] Spray guns are generally known in the prior art and are used, for example, in automotive workshops for painting automobiles. Spray guns are used to atomize and apply a fluid material to a surface. The material to be applied can be not only liquid but also powder. Spray guns have a compressed air interface and typically an air gauge for regulating the compressed air supply. In the air gauge, air flows through a first flow channel limited by a web, from a first opening region to a second opening region in a second flow channel of the air gauge. The first and / or second opening regions are limited or closed by a sleeve, thereby regulating the airflow.
[0003] In this context, it is now found that there is a need for a paint gun with optimized flow guidance, and in particular, a need for a paint gun with lower pressure loss and efficient operation. Summary of the Invention
[0004] The subject matter of the independent claims also enables the achievement of tasks mentioned during reading of this specification or that may be recognized by those skilled in the art, as well as other tasks. The dependent claims improve upon the central idea of the invention.
[0005] According to a first aspect, a paint spray gun is provided, comprising: a paint spray gun body having a first interface for a compressed air connector; an air fine-tuning gauge for adjusting the compressed air flow, the air fine-tuning gauge having an outlet interface for the compressed air flow and an inlet interface for the compressed air flow, the outlet interface corresponding to the first interface of the paint spray gun body; wherein the air fine-tuning gauge includes a first flow channel section and a second flow channel section, wherein the first flow channel section and the second flow channel section are arranged sequentially along a common longitudinal axis and separated from each other by a separation wall; wherein the first flow channel section has a first opening region and the second flow channel section has a second opening region; wherein compressed air flow flows from the first opening region into the second opening region; wherein the air fine-tuning gauge has a closing mechanism for at least partially closing the first opening region and / or the second opening region, such that the compressed air flow flowing from the first opening region into the second opening region is adjusted, and wherein the first opening region and / or the second opening region has at least one elongated orifice.
[0006] According to a second aspect, an air fine-tuning gauge for a paint spray gun is provided, comprising at least: an inlet port for a compressed air flow and an outlet port for a compressed air flow, and an inner sleeve, wherein the inner sleeve has at least one first opening region and a second opening region, wherein a separation wall is arranged within the inner sleeve between the first opening region and the second opening region, wherein the air fine-tuning gauge has a closing mechanism for at least partially closing the first opening region and / or the second opening region, wherein the closing mechanism at least partially surrounds the outer surface of the inner sleeve, wherein the inner sleeve and the closing mechanism are connected to each other by threads such that rotation of the closing mechanism relative to the inner sleeve about the longitudinal axis of the inner sleeve produces movement of the closing mechanism relative to the inner sleeve along the longitudinal axis of the inner sleeve, and wherein the first opening region and / or the second opening region has at least one elongated hole.
[0007] The following statements apply to the paint gun according to the invention and the air fine-tuning gauge according to the invention. In particular, the air fine-tuning gauge according to the invention can be used in the paint gun according to the invention.
[0008] The term "spray gun" specifically refers to a handheld painting unit having a trigger handle for operating a valve designed to release paint flow. The terms "spray gun," "paint nozzle," or other appellations containing the terms "paint" or "coating" should not be construed as limiting to these materials. Using the spray gun according to the invention, for example, paints, adhesives, or varnishes, especially primers and varnishes, can be sprayed; these can be solvent-based or water-based, and liquids used in the food industry, wood preservatives, or other liquids can also be sprayed. The spray gun can be a handheld spray gun, as well as an automatic or robotic spray gun. Handheld spray guns are primarily used by manual laborers, especially painters, refiners, and varnishers. Automatic and robotic spray guns are typically used in conjunction with painting robots or painting machines for industrial applications. However, it is entirely conceivable that handheld spray guns could also be integrated into painting robots or painting machines. In particular, the spray gun according to the invention, designed as a handheld spray gun, can be designed as a flow-type cup gun with a paint cup arranged above the spray gun body, wherein the material to be sprayed flows into and through the paint channel from the paint cup substantially by gravity and by negative pressure at the front end of the paint nozzle. However, the spray gun according to the invention can also be a side-mounted cup gun, wherein the paint cup is arranged on the side of the spray gun body, and the material is similarly supplied to the spray gun by gravity and by negative pressure at the front end of the material nozzle. However, the spray gun according to the invention can also be designed as a suction-type or suspended cup gun with a paint cup arranged below the spray gun body, wherein the material to be sprayed is substantially drawn out of the paint cup by negative pressure. Furthermore, the spray gun can be designed as a pressure cup gun, wherein the cup is arranged below, above, or to the side of the spray gun body and is pressurized, and then the material to be sprayed is forced out of the cup. Additionally, the spray gun can be a kettle-type spray gun, wherein the material to be sprayed is supplied to the spray gun from a paint container or by a pump via a hose. The paint gun according to the invention can be a low-pressure paint gun, particularly an HVLP paint gun, with a maximum nozzle internal pressure of 10 psi or 0.7 bar, thereby achieving a transfer rate greater than 65%. However, the paint gun can also be a compliant paint gun, with a nozzle internal pressure greater than 10 psi or 0.7 bar, but also achieving a transfer rate greater than 65%. The paint gun can be a compressed air atomizing paint gun. The paint gun can be an air-supported paint gun. The paint gun can be an airless paint gun. The paint gun can be a paint gun for powder coating. The paint gun can be an electrostatic paint gun. The paint gun can be a rotary atomizer. However, the paint gun can also be other types of paint guns.
[0009] A paint spray gun can have a compressed air connector, a paint needle, a trigger holder for opening the air valve and removing the paint needle from the outlet of the paint nozzle, a circular-to-flat spray pattern adjustment device for adjusting the ratio of atomizing air to angular air to form a paint jet, a material quantity adjustment device for setting the maximum material volume flow rate, a material connector, a paint channel for guiding the material to be sprayed from the material inlet to the material outlet, a hanger, and / or an analog or digital pressure measuring device. However, the paint spray gun can also have other components as described in the prior art.
[0010] A first interface for a compressed air connector in or at the spray gun body specifically refers to an interface through which compressed air can be transported from an air fine-tuning gauge into the spray gun body. Here, the first interface may include a sealing ring and / or a mechanical coupling torque. The air fine-tuning gauge is particularly used to adjust the compressed air supply to the spray gun. A flow passage inside the spray gun body can be connected to the first interface. The air fine-tuning gauge is particularly useful for adjusting air pressure and / or air volume flow. The air fine-tuning gauge is particularly useful for adjusting, and in particular increasing and / or decreasing, the flow cross-section of the air flowing into the spray gun. The air fine-tuning gauge is particularly useful for adjusting, and in particular increasing and / or decreasing, the flow cross-section of the air flowing into the upper region of the spray gun's substrate.
[0011] The outlet port of the air fine-tuning gauge specifically refers to an interface through which compressed air can be transported from the air fine-tuning gauge to the paint gun body. Here, the outlet port may include a sealing ring and / or a mechanical coupling element. A first interface corresponds to the outlet port.
[0012] The inlet interface of the air fine-tuning gauge specifically refers to an interface through which compressed air can be supplied from a compressed air hose to the air fine-tuning gauge. The inlet interface can directly contact the compressed air hose or indirectly via a rotating joint and / or via other or additional components. Here, the inlet interface may include a sealing ring and / or a mechanical coupling element.
[0013] The term "spray gun body" specifically refers to a housing designed to arrange the components of the spray gun relative to each other and to at least partially surround the components. Here, the spray gun body particularly has a handle portion. Here, a needle valve for applying paint is particularly arranged in or at the spray gun body, and, if necessary, an air valve for releasing compressed air, a compressed air interface, and a paint application connector are also arranged. Furthermore, a paint nozzle body is particularly arranged at the spray gun body. Here, the spray gun body particularly has an interface for the paint nozzle body, and the paint nozzle body has a corresponding interface. The interface is particularly configured as threaded. The spray gun body can be made of plastic or metal.
[0014] The term "separation wall" specifically refers to a wall designed to prevent direct flow from a first flow channel section to a second flow channel section. The separation wall is, for example, configured as the web of a hollow column. Flow from the first flow channel section to the second flow channel section is achieved, particularly via a first opening region and a second opening region arranged within the first and second flow channels. The separation wall is, in particular, impermeable to fluid.
[0015] Preferably, at least a portion of the air flow path between the inlet and outlet ports of the air fine-tuning gauge, particularly at least a portion of the air flow path between the first and second opening regions, is bounded by the outer surface of the air fine-tuning gauge and the inner surface of the paint gun body.
[0016] The term "closing mechanism" specifically refers to a structural element designed to limit or close a first opening region and / or a second opening region, thereby regulating the compressed air flow. Here, the closing mechanism can particularly be a sleeve. This sleeve, for example, can be translated along the axis of a fine-tuning gauge via a thread, causing the opening regions to open or close to different degrees. The sleeve can, for example, be arranged in the region of a second flow channel section and adjust only the second opening region. The sleeve can, for example, be arranged in the region of a first flow channel section and adjust only the first opening region. The sleeve can, for example, be arranged in the region of a first flow channel section and adjust both the first and second opening regions.
[0017] The term "elongated hole" specifically refers to an elongated opening or recess in a first flow channel section and / or a second flow channel section. Here, the elongated hole particularly has a parallel region in its longitudinal extension. The parallel region has a constant width. The elongated hole particularly has both length and width. The elongated hole particularly extends along the flow direction of the flow channel section. The elongated hole particularly has rounded regions at its ends. In the parallel region, the width from one side to the other is constant. The elongated hole can be constructed in a straight line. The elongated hole can have curvature in its longitudinal region. Here, the ends of the elongated hole can be constructed at an angle or have rounded portions. The elongated hole can be an elongated recess. Therefore, an elongated hole is significantly different from a drill hole with a constant diameter. The edges of the elongated hole are preferably rounded and / or inclined, and / or have chamfered edges.
[0018] This invention is based on the discovery that paint spray guns use an air adjuster to regulate the compressed air flow. Here, the air adjuster typically has a drilled hole of constant radius in a first flow channel section and / or a second flow channel section. Air flows from the drilled hole in the first flow channel section and through the drilled hole in the second flow channel section into the second flow channel section. A sleeve is typically used as the closing mechanism, which partially, completely, or completely closes the drilled hole. The cross-section of the drilled hole has a non-constant spacing between opposing sides along its length, as the drilled hole first widens and then narrows again. Therefore, with each movement of the closing mechanism, the surface through which air is flowed does not change linearly. Furthermore, it is thus concluded that in the fully open state, the two ends of the drilled hole taper to zero. This results in flow loss or airflow separation in the initial and end regions. Furthermore, a flow region exists in the initial region where no compressed air flows. Therefore, the effective opening region through which compressed air flows is smaller than the geometrically existing opening region. In paint guns using pressure gauges, pressure is measured upstream of the air trimmer (i.e., between the air pressure hose and the air trimmer, for example). This means that the pressure gauge cannot detect the pressure loss caused by the air trimmer. Therefore, there is a difference in pressure measurement at the relevant location (i.e., the flow channel in the paint gun body). The present invention reduces pressure loss, thereby reducing measurement error. The present invention achieves a pressure loss of 0.1 bar, where conventional air trimmers have a pressure loss of up to 0.5 bar. The present invention solves this problem by using a long hole instead of a drilled hole. Thus, the present invention achieves linear behavior when adjusting the compressed air flow. Furthermore, in the fully or completely open state, the air trimmer (particularly the opening area) is open at at least one end in an area with a constant width or parallel sides. This causes a reduction in airflow separation and an expansion of the opening area for effective flow through. Furthermore, this also achieves lower pressure loss. This enables an efficient operating mode. This allows for more precise pressure adjustment because the uncertainty of flow loss is reduced.
[0019] In one embodiment, the first opening region and / or the second opening region have four elongated holes that are radially distributed around the circumference of the first flow channel section and / or the second flow channel section.
[0020] In this way, uniform flow behavior can be achieved.
[0021] In one embodiment, the closing mechanism in the fully open state closes at least one elongated hole at least partially in a region of constant width.
[0022] This ensures that the open area has its maximum width at least upstream of the flow. In other words, the starting area of the open area is not placed in the corner of the elongated orifice or in the rounded portion of the elongated orifice. This allows for minimizing airflow separation and optimizing settings for fine-tuning the airflow timing.
[0023] In one embodiment, at least one elongated hole has parallel side regions, wherein the closing mechanism, in a fully open state, at least partially closes at least one elongated hole in the parallel side regions.
[0024] This ensures that the open area has its maximum width at least upstream of the flow. In other words, the starting position of the open area is not placed in the corner of the elongated orifice or in the rounded portion of the elongated orifice. This allows for minimizing airflow separation and optimizing settings for fine-tuning the airflow timing.
[0025] In one embodiment, the closing mechanism is a sleeve having a threaded section for displacement.
[0026] In this way, the opening range is adjusted by rotating the sleeve. Rotation achieves a uniform setting of the opening range. The air fine-tuning gauge has a threaded section (i.e., external thread) on the outer surface of the flow channel, which corresponds to the threaded section (i.e., internal thread) of the sleeve. Rotating the sleeve causes it to translate, particularly along the longitudinal axis of the inner sleeve.
[0027] In one implementation, the device needs to rotate three to five times between the fully open and fully closed states.
[0028] This method enables fine adjustment. It positively impacts the operability of the air regulator, allowing for sufficiently precise adjustments with as few turns as possible. Specifically, 4.5 turns are required between the fully open and fully closed positions.
[0029] In one embodiment, the sleeve has a cylindrical outer cover in a region of the paint gun body, and the corresponding region in the paint gun body has a cylindrical shape.
[0030] In this way, the sleeve is supported during operation. The cylindrical inner wall of the gun body supports the sleeve. During operation, the sleeve can elastically deform outward using compressed air. The cylindrical outer surface or its inner side restricts this deformation.
[0031] In one embodiment, compressed air flows from the first opening region through a region defined by the paint gun body to the second opening region.
[0032] This area is shaped by the internal structure of the paint gun body. An air fine-tuning gauge is arranged within the paint gun body, allowing compressed air to flow between the first and second opening areas when the closure mechanism is at least partially open. This area forms a channel that fluidly connects the first and second opening areas.
[0033] This method enables a compact design.
[0034] Preferably, the end section of the closure mechanism is designed to at least partially close the first opening region and / or the second opening region. This provides further advantages in terms of airflow behavior compared to a design where the middle section of the closure mechanism is designed to at least partially close the first opening region and / or the second opening region.
[0035] Preferably, the closed areas of the first and / or second opening regions of the closure mechanism have a constant inner diameter. This also has advantages in terms of airflow behavior.
[0036] Preferably, the first opening region and / or the second opening region have chamfers. In particular, chamfers are present around the edge of the elongated hole. Particularly preferably, the first opening region has chamfers on the inner surface of the inner sleeve. Particularly preferably, the second opening region has chamfers on the outer surface of the inner sleeve. This provides further advantages in airflow behavior.
[0037] On the other hand, it relates to the application of an air fine-tuning gauge having a first opening region and / or a second opening region in the aforementioned paint gun, wherein the first opening region and / or the second opening region has at least one elongated hole.
[0038] The aforementioned features, as well as features from different embodiments, can be combined with each other, thereby producing a synergistic interaction that transcends the sum of individual effects. Attached Figure Description
[0039] The present invention will now be explained using exemplary embodiments, which are described with reference to the following drawings: Figure 1 An exemplary embodiment of the air fine-tuning gauge according to the invention or an exemplary embodiment of the air fine-tuning gauge according to the invention of a paint gun is shown. Figure 2 Partial diagrams illustrating exemplary embodiments of a paint gun according to the invention, or exemplary embodiments of a paint gun having an air fine-tuning device according to the invention; and Figure 3 An exemplary paint gun according to the invention or an exemplary embodiment of a paint gun having an air fine-tuning gauge according to the invention is shown. Detailed Implementation
[0040] Exemplary embodiments will now be described and illustrated with reference to the accompanying drawings. Here, the same or similar reference numerals denote similar or interacting components.
[0041] Figure 1 An exemplary embodiment of the air fine-tuning gauge 12 according to the present invention or an exemplary air fine-tuning gauge 12 of a paint gun 100 according to the present invention is shown. The air fine-tuning gauge 12 is used to adjust the compressed air flow in the paint gun 100. The air fine-tuning gauge 12 has an inlet interface 14. The inlet interface 14 can be connected to a rotating joint or a compressed air hose. Figure 1 (Not shown in the image). The first flow channel section 15 is connected to the inlet port 14. The first flow channel section 15 is limited downstream by a separation wall 17, preventing compressed air from directly entering the second flow channel section 16. The compressed air flow 30 flows out of the first flow channel section 15 through the first opening region 18 and flows into the second flow channel section 16 via the second opening region 19. Currently, the opening regions 18 and 19 are configured as elongated holes. The elongated holes 18 and 19 have a region 22 of constant width and a rounded portion 23 at their ends. In the region 22 of constant width, the opposing longitudinal sides of the elongated holes 18 and 19 are arranged parallel to each other. Therefore, there are parallel side regions in the longitudinal direction. This side region corresponds to region 22. The compressed air flow 30 further enters the paint gun body 110 from the second flow channel section 16 via the outlet port 13. Figure 1 (Not shown in the image). The opening region 18 can be adapted via the closing mechanism 20. Currently, the closing mechanism 20 is configured as a threaded sleeve 20. Through the rotational movement of the sleeve 20, in particular, the sleeve 20 can travel axially along the inner sleeve 9, thereby changing the opening area of the first opening region 18, thus regulating the compressed air flow 30. Currently, each of the four elongated holes 18 and 19 is radially distributed on the circumference of the first flow channel section 15 and the second flow channel section 16. The sleeve 20 is currently shown in a fully open position. It should be noted that the sleeve 20 does not fully expose the elongated holes 18 and still closes the initial region in which the rounded portion 23 exists. As a result, the cross-sectional area of the flow passage is initially constant and does not increase further. In contrast, this is not the case in the case of a circular borehole. The constant width 22 of the first opening region 18 in the initial region of the first opening region 18 reduces airflow separation on the open side, thereby causing lower pressure loss. By selecting an elongated orifice, it is also possible to achieve near-linear adjustment of the compressed air flow 30 based on the position of the sleeve 20.
[0042] Figure 2Partial diagrams are shown of an exemplary paint gun according to an embodiment of the invention, or an exemplary embodiment of a paint gun having an air fine-tuning gauge 212 according to the invention. Currently, the air fine-tuning gauge 212 is arranged in the paint gun body 210 of the paint gun. The air fine-tuning gauge 212 is shown in the open state. Currently, the rotating joint 240 is arranged below the air fine-tuning gauge 212. Furthermore, a region 241 within the paint gun body 210 is shown in cross-sectional view; this region serves as free space and fluidly connects the first opening region 218 and the second opening region 219. Additionally, a flow channel 242 is shown in the paint gun body 210. This flow channel is connected to a first interface 211 in the paint gun body 210. The first interface 211 corresponds to the air outlet interface 213 of the air fine-tuning gauge 212. Currently, the sleeve 220 moves via a thread 243. The sleeve 220 is currently sealed via two sealing rings 244 and 245. Between the first opening region 218 and the second opening region 219, the airflow path is limited by the outer surface of the air fine-tuning gauge 212 and the inner surface of the paint gun body 210.
[0043] Figure 3 An exemplary paint gun 100 according to the invention is shown, or an exemplary embodiment of a paint gun 100 having an air fine-tuning gauge 140 according to the invention. The paint gun 100 includes a paint gun body 110. The paint gun body 110 is currently made of metal, particularly aluminum alloy, and has a handle. Currently, a needle valve for applying paint and an air valve for releasing compressed air, a first interface 120 for a compressed air connector, and a paint application connector are arranged in the paint gun body 110, for example. The paint gun 100 also includes a paint nozzle body, which is releasably connected to the paint gun body 110 via threads and... Figure 3 The spray gun 100 is covered by an air nozzle 150, shown schematically. The spray gun 100 also includes an operating bow element 130. The operating bow element 130 is designed to be detachably connected to the spray gun body 100. For example, this detachable connection can be achieved via a plug-in or snap-fit connection. The operating bow element 130 is rotatably supported in a drilled hole in the spray gun body 110 via bolts. Operating the operating bow element 130 operates a needle valve for applying paint and an air valve for releasing compressed air. Here, the spray gun 100 also includes an air fine-tuning gauge 140, which corresponds to... Figure 1 The air fine-tuning gauge 12 is described in the text. Currently, the air fine-tuning gauge 140 also has a rotary joint 141, which has an interface 142 for a compressed air hose 143.
[0044] List of reference numerals
[0045] 110 and 210 spray gun bodies
[0046] 120, 211 First interface for compressed air connector
[0047] 12, 140, 212 Air Fine Adjustment Gauge
[0048] 13, 213 Export Interface
[0049] 14. Entry Interface
[0050] 15 First flow channel section
[0051] 16 Second flow channel section
[0052] 17 Separation Wall
[0053] 18, 218 First opening area, elongated hole
[0054] 19, 219 Second opening area, elongated hole
[0055] 20, 220 Closure mechanism, sleeve
[0056] 21. Outer surface of the sleeve
[0057] 22. Region of constant width at the elongated hole
[0058] 23. Rounded portion at the elongated hole
[0059] 30 Compressed air flow
[0060] 100 spray paint guns
[0061] 130 Operating bow-shaped element
[0062] Rotate the joints at 141 and 240 degrees.
[0063] 142 Interface for compressed air hoses
[0064] 143 Compressed air hose
[0065] 150 air nozzle
[0066] 9.209 Inner Sleeve
[0067] 241 Free space within the paint spray gun body
[0068] 242 Compressed air flow channel
[0069] 243 Threaded section
[0070] 244, 245 Sealing rings.
Claims
1. A paint spray gun (100), comprising: a paint spray gun body (110, 210) having a first interface (120, 211) for a compressed air connection; an air micro-regulator (12, 140, 212) for regulating a compressed air flow (30), the air micro-regulator having an outlet interface (13, 213) for the compressed air flow and an inlet interface (14) for the compressed air flow (30), the outlet interface corresponding to the first interface (120, 211) of the paint spray gun body (110, 210); wherein the air micro-regulator (12, 140, 212) comprises a first flow channel section (15) and a second flow channel section (16), wherein the first flow channel section (15) and the second flow channel section (16) are arranged one behind the other along a common longitudinal axis and are separated from each other by a separating wall (17); wherein the first flow channel section (15) has a first opening area (18, 218) and the second flow channel section (16) has a second opening area (19, 219); wherein the compressed air flow (30) flows from the first opening area (18, 218) into the second opening area (19, 219); wherein the air micro-regulator (12, 140, 212) has a closure mechanism (20, 220) for at least partially closing the first opening area (18, 218) and / or the second opening area (19, 219) such that the compressed air flow (30) flowing from the first opening area (18, 218) into the second opening area (19, 219) is regulated, and wherein the first opening area (18, 218) and / or the second opening area (19, 219) has at least one slot (18, 19, 218, 219).
2. The paint sprayer (100) of claim 1, wherein, The first opening area (18, 218) and / or the second opening area (19, 219) has four slots (18, 19, 218, 219) which are distributed radially on the circumference of the first flow channel section (15) or the second opening area (19, 219).
3. The paint sprayer (100) according to any one of the preceding claims, wherein, The closure mechanism (20, 220) in the fully open state at least partially closes the at least one slot (18, 19, 218, 219) in a region (22) of constant width.
4. The paint sprayer (100) according to any one of the preceding claims, wherein, The at least one slot (18, 19, 218, 219) has parallel side regions, and wherein the closure mechanism (20, 220) in the fully open state at least partially closes the at least one slot (18, 19, 218, 219) in the parallel side regions.
5. The paint sprayer (100) according to any one of the preceding claims, wherein, The closure mechanism (20, 220) has a sleeve (20, 220) with a threaded section (243) for displacement.
6. The paint sprayer (100) of claim 5, wherein, Three to five turns are required between the fully open state and the fully closed state.
7. The paint sprayer (100) of claim 5 or 6, wherein, The sleeve (20, 220) has a cylindrical outer cover surface (21) in the region of the paint gun body (110, 210), and the corresponding region in the paint gun body (110, 210) has a cylindrical shape.
8. The paint sprayer (100) according to any one of the preceding claims, wherein, The compressed air flow (30) flows from the first opening region (18, 218) to the second opening region (19, 219) via a region (241) delimited by the paint gun body (110, 210).
9. The paint sprayer (100) according to any one of the preceding claims, wherein, An end section of the closure mechanism (20, 220) is designed to at least partially close the first opening region (18, 218) and / or the second opening region (19, 219).
10. The paint sprayer (100) according to any one of the preceding claims, wherein, The region of the closure mechanism (20, 220) that closes the first opening region (18, 218) and / or the second opening region (19, 219) has a constant inner diameter.
11. Use of an air micro-regulator (12, 140, 212) having a first opening area (18, 218) and / or a second opening area (19, 219) in a paint spray gun (100) according to any one of claims 1 to 10, wherein, The first opening region (18, 218) and / or the second opening region (19, 219) has at least one slot (18, 19, 218, 219).
12. An air micro regulator (12, 140, 212) for a paint gun (100), the air micro regulator having at least an inlet interface (14) for a compressed air flow (30) and an outlet interface (13, 213) for a compressed air flow (30), and an inner sleeve (9, 209), wherein The inner sleeve (9, 209) has at least a first opening region (18, 218) and a second opening region (19, 219), wherein, within the inner sleeve (9, 209), a separation wall (17) is arranged between the first opening region (18, 218) and the second opening region (19, 219), wherein the air micro regulator (12, 140, 212) has a closure mechanism (20, 220) for at least partially closing the first opening region (18, 218) and / or the second opening region (19, 219), wherein the closure mechanism (20, 220) at least partially surrounds an outer surface of the inner sleeve (9, 209), wherein the inner sleeve (9, 209) and the closure mechanism (20, 220) are connected to one another via a thread (243) such that a rotation of the closure mechanism (20, 220) about a longitudinal axis of the inner sleeve (9, 209) relative to the inner sleeve (9, 209) produces a movement of the closure mechanism (20, 220) along the longitudinal axis of the inner sleeve (9, 209) relative to the inner sleeve (9, 209), and wherein the first opening region (18, 218) and / or the second opening region (19, 219) has at least one slot (18, 218).
13. The air trimmer (12, 140, 212) of claim 12, wherein, An end section of the closure mechanism (20, 220) is designed to at least partially close the first opening region (18, 218) and / or the second opening region (19, 219). The region of the closure mechanism (20, 220) that closes the first opening region (18, 218) and / or the second opening region (19, 219) has a constant inner diameter. The first opening region (18, 218) and / or the second opening region (19, 219) has at least one slot (18, 19, 218, 219).
12. An air micro regulator (12, 140, 212) for a paint gun (100), the air micro regulator having at least an inlet interface (14) for a compressed air flow (30) and an outlet interface (13, 213) for a compressed air flow (30), and The inner sleeve (9, 209) has at least a first opening region (18, 218) and a second opening region (19, 219), wherein, within the inner sleeve (9, 209), a separation wall (17) is arranged between the first opening region (18, 218) and the second opening region (19, 219), wherein the air micro regulator (12, 140, 212) has a closure mechanism (20, 220) for at least partially closing the first opening region (18, 218) and / or the second opening region (19, 219), wherein the closure mechanism (20, 220) at least partially surrounds an outer surface of the inner sleeve (9, 209), wherein the inner sleeve (9, 209) and the closure mechanism (20, 220) are connected to one another via a thread (243) such that a rotation of the closure mechanism (20, 220) about a longitudinal axis of the inner sleeve (9, 209) relative to the inner sleeve (9, 209) produces a movement of the closure mechanism (20, 220) along the longitudinal axis of the inner sleeve (9, 209) relative to the inner sleeve (9, 209), and wherein the first opening region (18, 218) and / or the second opening region (19, 219) has at least one slot (18, 218). An end section of the closure mechanism (20, 220) is designed to at least partially close the first opening region (18, 218) and / or the second opening region (19, 219).
14. The air trimmer (12, 140, 212) of claim 12 or 13, wherein, The closing mechanism (20, 220) has a constant inner diameter of the area closing the first opening area (18, 218) and / or the second opening area (19, 219). The closing mechanism (20, 220) has a constant inner diameter of the area closing the first opening area (18, 218) and / or the second opening area (19, 219).