An automatic atomizing electric control pneumatic device

Abstract

The application provides an automatic atomization electric control pneumatic device, which comprises a spray gun body having a hand-held part and a main body part, the main body part is provided with a spray head assembly, the spray head assembly is internally provided with a first channel, the first channel is communicated with an air inlet and an air outlet, the spray head assembly is provided with a liquid discharge structure, one end of the liquid discharge structure close to the air outlet extends in the first channel and is provided with a liquid outlet, and the end away from the air outlet is connected with a needle cylinder, and the needle cylinder is provided with a piston; the main body part is provided with a power supply, the hand-held part is provided with an air source, and the air source is connected with the air inlet; the air source and the power supply are electrically connected with a control assembly for controlling the air source to be opened or closed; a negative pressure area is formed when high-pressure gas flows through the liquid outlet, the piston is pushed by atmospheric pressure to discharge liquid medicine, and the liquid medicine is contacted and rubbed with high-speed gas to form fine liquid drops after being discharged, the fineness and uniformity of atomized particles are significantly improved, and sufficient atomization is realized; the pneumatic device has simple structure and is convenient to use, and is beneficial to large-scale popularization and application.

Description

Technical Field

[0001] This application relates to the field of atomization technology, and in particular to an automatic atomization electro-pneumatic control device. Background Technology

[0002] The skin is the largest organ in the human body and its first natural barrier. When it suffers extensive skin damage, it can easily lead to fluid loss, electrolyte imbalance, hypoproteinemia, and severe infections, and in severe cases, even death. Skin grafting is the only effective way to treat extensive skin damage, but the treatment period is long and the complication rate is high, which cannot meet the current needs for skin trauma treatment. In 1992, Professor Fiona Wood of Western Australia created a simple atomizing device using a syringe and a simple nozzle. This device could spray cells suspended in saline solution onto the surface of skin lesions. Its advantage was that it could use a small amount of normal skin from the patient, after being separated in vitro, to load cells into the spraying device to treat large areas of skin lesions, shortening the overall treatment time and promoting wound healing. However, the device's effectiveness was poor because the size of the sprayed mist particles was uncontrollable. In 2008, Dr. Jörg Gerlach of the United States developed a complex electro-pneumatic skin spray gun. This device mainly consists of two parts: one is the drug solution and artificial vascular system, and the other is an active electronic control device. This device is separate, complex in structure, and inconvenient to use. The accompanying artificial vascular system dressing is also complicated and difficult to popularize. Utility Model Content

[0003] The purpose of this application is to address the above problems by providing an automatic atomizing electro-pneumatic device, comprising: The spray gun body has a handheld part and a main body part, and a power supply is provided in the main body part; The nozzle assembly is located at the front end of the main body. The nozzle assembly has a first channel inside, and an air inlet and an air outlet are respectively opened at both ends of the first channel. The nozzle assembly is provided with a liquid drainage structure. The end of the liquid drainage structure near the air outlet extends into the first channel and has a liquid outlet. The end away from the air outlet is connected to a syringe. A piston is movably connected inside the syringe. An air source is provided inside the handheld part and connected to the air inlet. The air source is used to input gas into the first channel so that the gas is discharged from the air outlet, thereby forming a negative pressure area between the air outlet and the liquid outlet. A control component is disposed on the spray gun body and is electrically connected to the power supply and the air source respectively, and is used to control the air source to be turned on or off.

[0004] According to certain embodiments of the present application, the technical solutions provided are as follows: The air source is an air pump, and the output end of the air pump is connected to the air inlet through an air pipe. The control component includes: A circuit board is disposed between the power supply and the air pump, and is electrically connected to the power supply and the air pump respectively; A rotary switch is provided on the handheld part and electrically connected to the circuit board. The rotary switch is used to control the power supply to or off of the air pump and the output pressure of the air pump. A push-button switch is located on the handheld part and is electrically connected to the circuit board. The push-button switch is used to control the air pump to start or stop.

[0005] According to certain embodiments of the present application, the technical solutions provided are as follows: The gas source is a gas storage tank, and the output end of the gas storage tank is connected to the air inlet through a gas pipe. The control component includes: A circuit board is disposed between the power supply and the gas storage tank, and is electrically connected to the power supply. A push-button switch is located on the handheld part and is electrically connected to the circuit board. The push-button switch is used to control the opening or closing of the gas tank.

[0006] According to the technical solutions provided in certain embodiments of this application, the nozzle assembly includes: A fixing base is provided at the front end of the main body, and the fixing base is provided with a first connection port and an air inlet, the first connection port being connected to the air inlet; The nozzle is located at the first connection port. The nozzle has a conical cavity and an exhaust cavity inside. The conical cavity is connected to the air inlet, and the exhaust cavity has an air outlet at its free end.

[0007] According to certain embodiments of the present application, the technical solutions provided are as follows: The fixed base has a second connection port at the end away from the nozzle; The drainage structure includes: A connecting mechanism is provided, which is sealed to the second connecting port. One end of the connecting mechanism extends into the fixed base, and the other end is used for detachable connection with the syringe. The needle is located in the fixed base and fixed to the connecting mechanism. The free end of the needle extends into the exhaust chamber and has the liquid outlet.

[0008] According to the technical solutions provided in certain embodiments of this application, a pneumatic plug is provided at the air inlet, and a pneumatic interface is provided at the front end of the main body. The pneumatic interface is connected to the air source through an air pipe. The pneumatic plug is used to insert and connect with the pneumatic interface so that the nozzle assembly is fixed to the spray gun body, and the first channel is connected to the air source.

[0009] According to the technical solutions provided in certain embodiments of this application, a positioning groove is provided at the front end of the main body, and the inner contour of the positioning groove matches the outer contour of the connecting mechanism.

[0010] According to the technical solutions provided in some embodiments of this application, the rear end of the main body is provided with a charging interface, and the charging interface is electrically connected to the power source.

[0011] According to the technical solutions provided in some embodiments of this application, a power indicator light is provided on the main body, and the power indicator light is electrically connected to the control component to indicate the voltage status of the power supply.

[0012] According to the technical solutions provided in certain embodiments of this application, the front end of the main body is further provided with a targeting lamp, which is used to emit red laser along the gas discharge direction.

[0013] Compared with the prior art, the beneficial effects of this application are as follows: This application provides an automatic atomizing electro-pneumatic device, including a spray gun body, which has a handheld part and a main body part. A nozzle assembly is provided at the front end of the main body part. The nozzle assembly has a first channel inside, with an air inlet and an air outlet at each end of the first channel. A liquid discharge structure is provided on the nozzle assembly. The end of the liquid discharge structure near the air outlet extends into the first channel and has a liquid outlet. The end away from the air outlet is connected to a syringe, and a piston is movably connected inside the syringe. The main body part contains... The device includes a power supply and a handheld unit with an air source connected to an air inlet. This air source supplies gas into the first channel, allowing it to exit through the outlet, creating a negative pressure zone between the outlet and the liquid outlet. The spray gun body also features a control unit electrically connected to both the power supply and the air source, controlling the air source's on / off operation. During use, the medication is loaded into the syringe. The user holds the handheld unit, directing the air outlet towards the skin lesion. The control unit activates the air source, driving the gas through the first channel and out through the outlet at high speed. The gas creates a negative pressure zone between the air outlet and the liquid outlet. Under atmospheric pressure, the piston moves towards the liquid outlet and pushes the liquid out. The liquid is then discharged from the outlet. After discharge, the liquid breaks up due to friction with the high-speed flowing gas, forming atomized droplets that reach the skin injury site. The negative pressure zone created by the high-pressure gas flowing through the outlet, combined with atmospheric pressure to push the piston and discharge the liquid, avoids the problem of spray failure caused by gravity affecting the direction of liquid supply. The friction between the high-speed gas and the liquid at the outlet forms fine droplets, significantly improving the fineness and uniformity of the atomized particles, achieving efficient and complete atomization. The positive pressure gas drives the atomized droplets to quickly reach the skin wound, allowing the atomized liquid to reach the deep layers of the wound and improving drug absorption efficiency. The atomization effect is achieved through the interaction of high-speed gas and liquid, without the need for ultrasonic or other auxiliary functions, avoiding the denaturation of the liquid due to high temperatures, and has wide applicability. The pneumatic device has a simple structure, is easy to use, and can be operated by a single person, which is conducive to large-scale promotion and application.

[0014] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an automatic atomizing electro-pneumatic device provided in an embodiment of this application; Figure 2 A schematic diagram of the spray gun body of an automatic atomizing electro-pneumatic device provided in this application embodiment; Figure 3 A cross-sectional view of an automatic atomizing electro-pneumatic device provided in an embodiment of this application; Figure 4 for Figure 3 Enlarged view of section A; Figure 5 A cross-sectional view of a mounting base for an automatic atomizing electro-pneumatic device provided in an embodiment of this application.

[0017] The text labels in the image represent: 1. Spray gun body; 2. Nozzle assembly; 3. Syringe; 4. Piston; 5. Air source; 6. Power supply; 11. Handheld part; 12. Main body; 13. Circuit board; 14. Rotary switch; 15. Press switch; 16. Positioning groove; 17. Charging interface; 18. Power indicator light; 19. Target light; 21. Fixing base; 22. Nozzle; 23. Needle; 24. Pneumatic plug; 25. Seal; 26. First connector; 27. Second connector; 101. Air outlet; 102. Air inlet; 103. Liquid outlet; 104. Second connection port; 201. Conical cavity; 202. Exhaust cavity; 203. Gas flow cavity. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0019] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0020] As mentioned in the background section, in order to solve the problems existing in the prior art, this embodiment provides an automatic atomizing electro-pneumatic device, including: The spray gun body 1 has a hand-held part 11 and a main body part 12, and a power supply 6 is provided in the main body part 12. The nozzle assembly 2 is located at the front end of the main body 12. The nozzle assembly 2 has a first channel inside, and an air inlet 102 and an air outlet 101 are respectively opened at both ends of the first channel. The nozzle assembly 2 is provided with a liquid drainage structure. The end of the liquid drainage structure near the air outlet 101 extends into the first channel and has a liquid outlet 103. The end away from the air outlet 101 is connected to a syringe 3. A piston 4 is movably connected inside the syringe 3. Air source 5 is located inside the handheld part 11 and connected to the air inlet 102. Air source 5 is used to input gas into the first channel so that the gas is discharged from the air outlet 101, thereby forming a negative pressure area between the air outlet 101 and the liquid outlet 103. The control component is located on the spray gun body 1 and is electrically connected to the power supply 6 and the air source 5 respectively, and is used to control the air source 5 to turn on or off.

[0021] like Figure 1-5 As shown, the spray gun body 1 is approximately pistol-shaped, with a handgrip 11 serving as a grip for the user. The spray gun body 1 includes a first housing and a second housing, which are fastened together to form a first space. The power supply 6 is located within this first space, near the rear end of the body 12. The nozzle assembly 2 is located at the front end of the body 12 and has a first channel inside. An air outlet 101 is located on the side of the nozzle assembly 2 away from the body 12, and an air inlet 102 is located on the side closer to the body. A drainage structure is fixed to the nozzle assembly 2 and extends along the front-rear direction of the spray gun body 1. Figure 1In the horizontal direction, the liquid discharge structure has one end of the liquid outlet 103 located in the first channel, near the air outlet 101, and the other end located outside the first channel and connected to the syringe 3; the air source 5 is located in the first space, in the handheld part 11 area, and the output end of the air source 5 is connected to the air inlet 102 for delivering high-pressure gas into the first channel; the control component is located on the spray gun body 1 for controlling the air source 5 to be turned on or off.

[0022] In use, the medication is loaded into the syringe 3. The user holds the handle 11 and directs the air outlet 101 toward the skin injury. The control unit activates the gas source 5, which drives the gas through the first channel and out through the air outlet 101. The high-speed gas flow creates a negative pressure area between the air outlet 101 and the liquid outlet 103. Under atmospheric pressure, the piston 4 moves towards the liquid outlet 103 and pushes the medication out through the liquid outlet 103. After being discharged, the medication breaks up due to friction with the high-speed gas, forming atomized droplets that reach the skin injury site with the gas. The negative pressure area created by the high-pressure gas flowing through the liquid outlet 103, along with atmospheric pressure, pushes the piston 4. The system discharges the medication, avoiding spray failure caused by gravity affecting the direction of medication supply. High-speed gas interacts with the medication at the outlet 101, forming fine droplets that significantly improve the fineness and uniformity of the atomized particles, achieving efficient and complete atomization. Positive pressure gas propels the atomized droplets to quickly reach the skin wound, allowing the atomized medication to penetrate deep into the wound and improve drug absorption efficiency. The atomization effect is achieved through the interaction of high-speed gas and medication, eliminating the need for ultrasonic assistance and avoiding medication denaturation due to high temperatures, thus broad applicability. The pneumatic device has a simple structure, is easy to use, and can be operated by a single person, facilitating large-scale application.

[0023] In a preferred embodiment, Air source 5 is an air pump, and the output end of the air pump is connected to the air inlet 102 through an air pipe; The control components include: Circuit board 13 is located between power supply 6 and air pump, and is electrically connected to power supply 6 and air pump respectively. Rotary switch 14 is located on the handheld part 11 and is electrically connected to the circuit board 13. Rotary switch 14 is used to control the power supply of the air pump and the output pressure of the air pump. Press switch 15 is located on the handheld part 11 and is electrically connected to the circuit board 13. Press switch 15 is used to control the air pump to start or stop.

[0024] Alternatively, please refer to Figure 3The air source 5 can be an air pump. Both the air pump and the circuit board 13 are located in the first space. The air pump is electrically connected to the power supply 6 through the circuit board 13. The push switch 15 is located between the first housing and the second housing, and the rotary switch 14 is located on the first housing or the second housing. Both are electrically connected to the circuit board 13. Rotating the rotary switch 14 generates a first signal. The circuit board 13 can control the power supply 6 to supply power to the air pump according to the first signal. It can also control the power supply 6 to increase the supply voltage to the air pump according to the first signal, thereby increasing the output pressure of the air pump. Rotating the rotary switch 14 in the opposite direction generates a second signal. The circuit board 13 can control the power supply 6 to decrease the supply voltage to the air pump according to the second signal, thereby reducing the output pressure of the air pump. It can also control the power supply 6 to disconnect from the air pump according to the second signal. Applying external force to the push switch 15 generates a third signal. The circuit board 13 can control the air pump to start according to the third signal. Removing the external force applied to the push switch 15 generates a fourth signal. The circuit board 13 can control the air pump to stop according to the fourth signal.

[0025] In a preferred embodiment, Gas source 5 is a gas storage tank, and the output end of the gas storage tank is connected to the air inlet 102 through a gas pipe; The control components include: Circuit board 13 is located between power supply 6 and gas tank and is electrically connected to power supply 6. The push switch 15 is located on the handheld part 11 and is electrically connected to the circuit board 13. The push switch 15 is used to control the opening or closing of the gas tank.

[0026] Optionally, the gas source 5 can be a gas storage tank containing high-pressure gas. Both the gas storage tank and the circuit board 13 are located in the first space. The output end of the gas storage tank is also equipped with a solenoid valve, which is electrically connected to the power supply 6 through the circuit board 13. The push switch 15 is located between the first housing and the second housing and is electrically connected to the circuit board 13. Applying external force to the push switch 15 can generate a fifth signal, and the circuit board 13 can control the solenoid valve to open according to the fifth signal. The gas storage tank delivers gas to the first channel through the gas pipe. Removing the external force applied to the push switch 15 can generate a sixth signal, and the circuit board 13 can control the solenoid valve to close according to the sixth signal. The gas storage tank stops delivering gas to the first channel.

[0027] By using an air pump or air tank as the power source for atomization, stable air pressure output is ensured during the atomization process, further improving the atomization effect.

[0028] In a preferred embodiment, the nozzle assembly 2 includes: The fixing seat 21 is located at the front end of the main body 12. The fixing seat 21 has a first connection port and an air inlet 102. The first connection port is connected to the air inlet 102. The nozzle 22 is located at the first connection port. The nozzle 22 has a conical cavity 201 and an exhaust cavity 202 that are connected inside. The conical cavity 201 is connected to the air inlet 102, and the free end of the exhaust cavity 202 has an air outlet 101.

[0029] like Figure 3-5 As shown, the first connection port is located on the side of the fixed base 21 away from the main body 12. A gas flow chamber 203 is formed between the first connection port and the air inlet 102. The nozzle 22 is fixed at the first connection port. The gas flow chamber 203, the conical cavity 201, and the exhaust cavity 202 are sequentially connected to form the aforementioned first channel. The conical cavity 201 and the exhaust cavity 202 are coaxially arranged. The inner diameter of the conical cavity 201 gradually decreases from the gas flow chamber 203 side to the exhaust cavity 202 side. Gas can enter the gas flow chamber 203 from the air inlet 102 under the drive of the air source 5, and then sequentially pass through the conical cavity... After passing through the conical cavity 201 and the exhaust chamber 202, the gas is discharged through the outlet 101. When the gas passes through the conical cavity 201, its flow area gradually decreases, and the gas velocity increases, allowing it to be discharged from the outlet 101 at high speed. When the high-speed flowing gas passes through the liquid outlet 103, it can create a negative pressure area between the liquid outlet 103 and the outlet 101, guiding the liquid medicine to be discharged from the liquid outlet 103, and atomizing the liquid medicine through friction with the liquid medicine. By setting the conical cavity 201, the gas velocity can be smoothly transitioned in the first channel, avoiding the generation of eddies or energy loss in the first channel.

[0030] In a preferred embodiment, The fixed base 21 has a second connection port 104 at the end away from the nozzle 22; The drainage structure includes: The connecting mechanism is sealed to the second connecting port 104. One end of the connecting mechanism extends into the fixed base 21, and the other end is used for detachable connection with the syringe 3. The needle 23 is located in the fixed base 21 and fixed to the connecting mechanism. The free end of the needle 23 extends into the exhaust chamber 202 and has an outlet 103.

[0031] like Figure 3-5As shown, the second connection port 104 is located on the side of the fixed base 21 near the main body 12 and is coaxially arranged with the first connection port. The connection mechanism is a hollow structure, including a sealing element 25, a first insertion element 26, and a second insertion element 27. The sealing element 25 is fixed at the second connection port 104 and is sealed to the second connection port 104. One end of the sealing element 25 is located in the first channel and is inserted and fixed to the first insertion element 26, and the other end is located outside the fixed base 21 and is inserted and fixed to the second insertion element 27. The needle 23 and the syringe 3 are respectively inserted and fixed to the first insertion element 26 and the second insertion element 27. The free end of the needle 23 extends along the axial direction of the second connection port 104 to the position near the air outlet 101 in the exhaust chamber 202. The axial distance between the liquid outlet 103 and the air outlet 101 is preferably 1~4mm. By setting the connection mechanism, the needle 23 and the fixed base 21 form a modular design. The needle 23 is located inside the fixed base 21, which can avoid the need for... When external environmental pollution occurs and the medication needs to be replaced, the syringe 3 can be removed from the connecting mechanism for replacement, making the operation more convenient and quick. During use, the gas enters the gas flow chamber 203 under the drive of the gas source 5. After passing through the conical chamber 201, the gas flow rate increases. The high-speed gas passes through the annular gap between the needle 23 and the exhaust chamber 202 and is discharged from the outlet 101. The high-speed gas flow creates a negative pressure area between the outlet 101 and the liquid outlet 103. The atmospheric pressure on the side of the liquid outlet 103 is less than the atmospheric pressure outside the piston 4. Under the action of the gas pressure, the piston 4 moves towards the side closer to the liquid outlet 103, pushing the medication in the syringe 3 to flow and be discharged from the liquid outlet 103. Due to the large difference between the medication flow rate (about 2m / s) and the gas flow rate (200-340m / s), friction occurs between the medication and the gas, causing the medication to break into droplets. After passing through the outlet 101, the droplets are further broken due to the sudden expansion of the flow area, thus achieving full atomization.

[0032] In a preferred embodiment, a pneumatic plug 24 is provided at the air inlet 102, and a pneumatic interface is provided at the front end of the main body 12. The pneumatic interface is connected to the air source 5 through an air pipe. The pneumatic plug 24 is used to insert and connect with the pneumatic interface so that the nozzle assembly 2 is fixed to the spray gun body 1, and the first channel is connected to the air source 5.

[0033] like Figure 1 and Figure 2 As shown, by setting a pneumatic plug 24 at the air inlet 102, the pneumatic plug 24 can be plugged into the pneumatic interface, thereby quickly assembling the nozzle assembly 2 and the spray gun body 1. At the same time, the first channel is connected to the air source 5 through the pneumatic plug 24 and the air pipe.

[0034] In a preferred embodiment, a positioning groove 16 is provided at the front end of the main body 12, and the inner contour of the positioning groove 16 matches the outer contour of the connecting mechanism.

[0035] like Figure 2 As shown, the positioning groove 16 is an arc-shaped groove. The inner contour of the positioning groove 16 matches the axial outer contour of the seal 25. When the pneumatic plug 24 is inserted into the pneumatic interface, the seal 25 abuts against the positioning groove 16. By observing the degree of fit between the seal 25 and the positioning groove 16, the operator can determine whether the nozzle assembly 2 and the spray gun body 1 are installed in place, ensuring that the two are tightly fixed.

[0036] In a preferred embodiment, the rear end of the main body 12 is provided with a charging interface 17, which is electrically connected to the power supply 6.

[0037] like Figure 3 As shown, a charging base can also be provided for the pneumatic device. By placing the spray gun body 1 on the charging base, the power supply 6 can be quickly charged using the charging interface 17.

[0038] In a preferred embodiment, the main body 12 is provided with a power indicator light 18, which is electrically connected to the control component and is used to indicate the voltage status of the power supply 6.

[0039] like Figure 1 and Figure 2 As shown, the power indicator light 18 is located on the first housing or the second housing and is electrically connected to the circuit board 13. The circuit board 13 detects the voltage status of the power supply 6 to determine the power status of the power supply 6, and then prompts the operator through the power indicator light 18. During normal use, the power indicator light 18 is green. When the power supply 6 is low on power, the power indicator light 18 is red and flashing. When the power supply 6 is charging, the power indicator light 18 is green and flashing. After charging is complete, the power indicator light 18 is green.

[0040] In a preferred embodiment, the front end of the main body 12 is further provided with a targeting lamp 19, which is used to emit red laser along the gas discharge direction.

[0041] like Figure 2 As shown, the target lamp 19 is a red laser lamp. The target lamp 19 is located at the front end of the main body 12, below the pneumatic interface. The target lamp 19 can emit red laser along the axis of the pneumatic interface to point at the target and develop the spray.

[0042] Working principle: Taking an air pump as the air source 5 as an example, in use, first turn the rotary switch 14 to connect the air pump to the power supply 6, and adjust the air pump to an appropriate output pressure. Aim the air outlet 101 at the wound site, press and hold the pressure switch 15, and the circuit board 13 controls the air pump to start. The air pump drives the gas through the air tube into the gas flow chamber 203, and then into the conical chamber 201. After passing through the conical chamber 201, the gas flow rate increases. The high-speed gas passes through the annular gap between the needle 23 and the exhaust chamber 202 and is discharged from the air outlet 101. The rapidly flowing gas creates a negative pressure zone between the air outlet 101 and the liquid outlet 103. The atmospheric pressure on the side of the liquid outlet 103 is less than the atmospheric pressure outside the piston 4. Under the action of the gas pressure, the piston 4 moves towards the side closer to the liquid outlet 103, pushing the liquid in the syringe 3 to flow and be discharged from the liquid outlet 103. Due to the large difference between the liquid flow rate and the gas flow rate, friction occurs between the liquid and the gas, causing the liquid to break into droplets. After passing through the air outlet 101, the droplets are further broken due to the sudden expansion of the flow area, thus achieving the atomization effect.

[0043] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An automatic atomizing electro-pneumatic control device, characterized in that, include: The spray gun body (1) has a hand-held part (11) and a main body part (12), and the main body part (12) is provided with a power supply (6). The nozzle assembly (2) is located at the front end of the main body (12). The nozzle assembly (2) has a first channel inside, and an air inlet (102) and an air outlet (101) are respectively opened at both ends of the first channel. The nozzle assembly (2) is provided with a liquid drainage structure. The end of the liquid drainage structure near the air outlet (101) extends into the first channel and is provided with a liquid outlet (103). The end away from the air outlet (101) is connected to a syringe (3). A piston (4) is movably connected inside the syringe (3). Gas source (5), the gas source (5) is located in the handheld part (11) and connected to the air inlet (102). The gas source (5) is used to input gas into the first channel so that the gas is discharged from the air outlet (101), thereby forming a negative pressure area between the air outlet (101) and the liquid outlet (103). A control component is provided on the spray gun body (1). The control component is electrically connected to the power supply (6) and the air source (5) respectively, and is used to control the air source (5) to be turned on or off.

2. The automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The air source (5) is an air pump, and the output end of the air pump is connected to the air inlet (102) through an air pipe. The control component includes: Circuit board (13), the circuit board (13) is disposed between the power supply (6) and the air pump, and is electrically connected to the power supply (6) and the air pump respectively; A rotary switch (14) is provided on the handheld part (11) and electrically connected to the circuit board (13). The rotary switch (14) is used to control the power supply to or off of the air pump and the output pressure of the air pump. The push switch (15) is located on the handheld part (11) and electrically connected to the circuit board (13). The push switch (15) is used to control the air pump to start or stop.

3. The automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The gas source (5) is a gas storage tank, and the output end of the gas storage tank is connected to the air inlet (102) through a gas pipe. The control component includes: Circuit board (13), the circuit board (13) is disposed between the power supply (6) and the gas storage tank, and is electrically connected to the power supply (6); The push switch (15) is located on the handheld part (11) and electrically connected to the circuit board (13). The push switch (15) is used to control the opening or closing of the gas tank.

4. The automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The nozzle assembly (2) includes: A fixing seat (21) is provided at the front end of the main body (12). The fixing seat (21) is provided with a first connection port and an air inlet (102). The first connection port is connected to the air inlet (102). The nozzle (22) is located at the first connection port. The nozzle (22) has a conical cavity (201) and an exhaust cavity (202) that are connected inside. The conical cavity (201) is connected to the air inlet (102). The exhaust cavity (202) has an air outlet (101) at its free end.

5. The automatic atomizing electro-pneumatic device according to claim 4, characterized in that, The fixed base (21) has a second connection port (104) at the end away from the nozzle (22); The drainage structure includes: A connecting mechanism is sealed to the second connecting port (104), one end of the connecting mechanism extends into the fixed base (21), and the other end is used for detachable connection with the syringe (3); The needle (23) is located in the fixed base (21) and fixed to the connecting mechanism. The free end of the needle (23) extends into the exhaust chamber (202) and has the liquid outlet (103).

6. The automatic atomizing electro-pneumatic device according to claim 1, characterized in that, A pneumatic plug (24) is provided at the air inlet (102), and a pneumatic interface is provided at the front end of the main body (12). The pneumatic interface is connected to the air source (5) through an air pipe. The pneumatic plug (24) is used to insert and connect with the pneumatic interface so that the nozzle assembly (2) is fixed to the spray gun body (1), and the first channel is connected to the air source (5).

7. An automatic atomizing electro-pneumatic device according to claim 5, characterized in that, The front end of the main body (12) is provided with a positioning groove (16), and the inner contour of the positioning groove (16) matches the outer contour of the connecting mechanism.

8. The automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The rear end of the main body (12) is provided with a charging interface (17), which is electrically connected to the power source (6).

9. An automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The main body (12) is provided with a power indicator light (18), which is electrically connected to the control component and is used to indicate the voltage status of the power supply (6).

10. An automatic atomizing electro-pneumatic device according to claim 1, characterized in that, The front end of the main body (12) is also provided with a target lamp (19), which is used to emit red laser along the gas discharge direction.

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