Spraying method and spraying device

Abstract

The invention relates to a spraying method and a spraying device. The spraying method is suitable for allowing an aerosol in a cavity unit to enter from a first opening of a nozzle unit and to be sprayed out from a second opening of the nozzle unit. The spraying method comprises the following steps of: sucking the aerosol from the first opening and spraying the aerosol from the second opening through a first gas flowing along a flowing direction from the first opening to the second opening; the spraying method has the beneficial effects that the mode of directly spraying the fogging agent replaces the mode of directly spraying the liquid agent and simultaneously atomizing the liquid agent, so that the spraying method can have a relatively uniform spraying effect.

Description

Technical Field

[0001] The present invention relates to a spraying method and a spraying device for spraying a workpiece, and particularly to a spraying method and a spraying device for directly ejecting an aerosol agent. Background Art

[0002] The Taiwan, China patent No. I294310 patent case "Liquid Spraying Method" has disclosed a method for spraying a liquid of a liquid spraying device. The liquid spraying method dispenses at least one liquid from a liquid dispensing opening; discharges a first compressed gas from a first compressed gas outlet formed around the liquid dispensing opening to atomize the liquid dispensed from the liquid dispensing opening to form a particulate discharge air flow; and discharges a second compressed gas from a plurality of second compressed gas outlets toward the particulate discharge air flow to impact at least a part of each of the second compressed gases onto the particulate discharge air flow to vortex the particulate discharge flow, and on the other hand, to finely atomize the particulate discharge air flow.

[0003] Although such a liquid spraying device can eject the liquid so that the liquid is sprayed onto a workpiece, however, since such a liquid spraying device first forms fine particles by mixing the liquid with the first compressed gas through the Bernoulli effect, and then further atomizes the fine particles by impacting the fine particles with the second compressed gas, it is not easy to control the spraying amount of the liquid during implementation, resulting in a not-so-good spraying uniformity effect, and there is also no mechanism for controlling the spraying range, which needs to be further improved. Summary of the Invention

[0004] Therefore, an object of the present invention is to provide a method and device that can at least overcome one of the disadvantages in the background art.

[0005] The spraying method of the present invention is applicable to an aerosol agent in a cavity unit entering through a first opening of a nozzle unit and being ejected from a second opening of the nozzle unit. The spraying method includes: sucking the aerosol agent from the first opening and ejecting it from the second opening by a first gas flowing along a flow direction from the first opening to the second opening.

[0006] The beneficial effect of the present invention is that the method of directly ejecting the aerosol agent is used to replace the method of ejecting and atomizing the liquid agent at the same time. Therefore, the present invention can produce a more uniform spraying effect compared with the conventional spraying methods.

[0007] The object of the present invention is to improve at least one of the disadvantages in the background art.

[0008] The spraying method of the present invention is applicable to an aerosol agent in a cavity unit entering through a first opening of a nozzle unit and being ejected from a second opening of the nozzle unit. The spraying method includes: restricting the range of the aerosol agent ejected from the second opening by a second gas flowing around the second opening.

[0009] The beneficial effects of the present invention are as follows: It can limit the spraying range after the aerosol is ejected, and produce a more precise spraying effect.

[0010] The purpose of the present invention is to improve at least one shortcoming of the background art.

[0011] The spraying device of the present invention is applicable to spraying an aerosol, and is provided with a cavity unit, a nozzle unit, and a gas supply unit.

[0012] The cavity unit is suitable for accommodating the aerosol. The nozzle unit is provided with a first channel fluidly connecting the cavity unit, and a first opening and a second opening respectively located at two opposite ends of the first channel. The gas supply unit can provide a first gas flowing in the first channel along a flow direction from the first opening to the second opening, so that the aerosol is inhaled from the first opening and ejected from the second opening.

[0013] The beneficial effects of the present invention are as follows: Since the nozzle unit is fluidly connected to the cavity unit that can be used to accommodate the aerosol, the aerosol can be directly ejected. Compared with the conventional design of atomizing the liquid agent while directly ejecting it, a more uniform spraying effect can be produced. Description of the Drawings

[0014] Other features and beneficial effects of the present invention will be clearly presented in the embodiments with reference to the drawings, where:

[0015] Figure 1 is a perspective view of a spraying device and a liquid storage device in a first embodiment of the spraying method and spraying device of the present invention;

[0016] Figure 2 is an incomplete exploded perspective view, showing the assembly relationship between a cavity cover and a cavity base of the spraying device in the figure;

[0017] Figure 3 is a top view of the spraying device;

[0018] Figure 4 is a cross-sectional view, taken along Figure 3 the center line A - A, and the cavity cover is not sectioned in the figure;

[0019] Figure 5 is a cross-sectional view, taken along Figure 3 the center line B - B, and the cavity cover is not sectioned in the figure;

[0020] Figure 6 is an incomplete cross-sectional view, magnifying and showing the structure of a part of a nozzle assembly of the nozzle unit of the spraying device;

[0021] Figure 7 is an incomplete cross-sectional view, magnifying and illustrating the structure of another part of the nozzle assembly and a nozzle jacket of the nozzle unit;

[0022] Figure 8 is an incomplete cross-sectional view, similar to Figure 7 , but the relative position of the nozzle jacket and the nozzle assembly is different;

[0023] Figure 9 is a cross-sectional view, illustrating the operation mode of the spraying device, and simultaneously showing the formation of a swirling air flow in the figure;

[0024] Figure 10 is a step flow chart, illustrating a spraying method in this first embodiment;

[0025] Figure 11 is a step flow chart, illustrating a variation of the spraying method;

[0026] Figure 12 is a perspective view, illustrating a second embodiment of the spraying method and spraying device of the present invention;

[0027] Figure 13 is an incompletely disassembled perspective exploded view, illustrating the assembly relationship between the cavity cover and the cavity seat in this second embodiment;

[0028] Figure 14 is a top view, illustrating the spraying device in this second embodiment;

[0029] Figure 15 is a cross-sectional view, cut along Figure 3 center line C - C, and the cavity cover is not cut in the figure; and

[0030] Figure 16 is a cross-sectional view, cut along Figure 3 center line D - D, and the cavity cover is not cut in the figure.

[0031] Explanation of reference numerals:

[0032] 1: Spraying device 2: Liquid storage device

[0033] 21: Liquid storage unit 22: Pushing unit

[0034] 3: Cavity unit 31: Cavity seat

[0035] 311: Chamber 32: Cavity cover

[0036] 321: Air groove 4: Ultrasonic oscillation unit

[0037] 41: Fixing member 42: Ultrasonic oscillator

[0038] 420: Internal channel 421: Inlet end

[0039] 422: Outlet end 423: Nozzle opening

[0040] 43: Positive pressure gas source 5: Nozzle unit

[0041] 51: Nozzle assembly 52: Nozzle jacket

[0042] 521: Second air intake space 522: Second channel

[0043] 523: Third opening 53: First connector

[0044] 54: Second connector 55: Nozzle seat

[0045] 551: First air intake space 56: Inner tube

[0046] 561: First flow channel 562: First opening

[0047] 563: Connecting pipe orifice 57: Outer tube

[0048] 571: Insertion pipe section 572: Threaded pipe section

[0049] 573: Extension pipe section 574: Second flow channel

[0050] 575: Outer tube inlet 576: Second opening

[0051] 58: First channel 6: Gas supply unit

[0052] 61: First gas source 62: Second gas source

[0053] 63: First pipeline 64: Second pipeline

[0054] 7: Liquid supply unit 71: Liquid supply channel

[0055] 91: Liquid agent 92: Aerosol

[0056] 93: Workpiece D11: Flow direction

[0057] F11: First air flow F12: Second air flow

[0058] F13: Vortex air flow G11: First gas

[0059] G12: Second gas G13: Third gas

[0060] L11: Median line M1: Spraying method

[0061] S1: Aerosol formation step S2: Aerosol spraying step

[0062] S21: First input step S22: Second input step

[0063] S23: Third input step S3: Aerosol balancing step. Detailed implementation manners

[0064] In the following description, similar or identical elements will be denoted by the same reference numerals.

[0065] Refer to Figure 1 , in a first embodiment of the spraying method and spraying device of the present invention, a spraying device 1 will be described first. The spraying device 1 is suitable for atomizing a liquid agent 91 stored in a liquid storage device 2 into an aerosol 92 (see Figure 9 ) and then spraying the aerosol 92 onto a workpiece 93 (see Figure 9 ). In this first embodiment, the liquid agent 91 is a flux, and the workpiece 93 is a printed circuit board or an integrated circuit component.

[0066] The liquid storage device 2 is provided with a liquid storage unit 21 suitable for accommodating the liquid agent 91 and fluidly connecting to the spraying device 1, and a pushing unit 22 capable of pushing the liquid agent 91 to the spraying device 1. The liquid storage unit 21 may be, for example, a liquid storage barrel. The pushing unit 22 is, for example, a gas source capable of forming positive pressure, such as an air pump or a high-pressure gas tank.

[0067] Refer to Figure 1 , 2 , 3, the spraying device 1 includes a cavity unit 3, an ultrasonic oscillation unit 4 inserted on the cavity unit 3 and a nozzle unit 5, and a gas supply unit 6 for supplying gas to the nozzle unit 5.

[0068] Refer to Figure 2 , 4 , 5, the cavity unit 3 is provided with a cavity seat 31, and a cavity cover 32 that can be screwed and coupled to one end of the cavity seat 31.

[0069] The cavity seat 31 defines a cavity 311 that is cylindrical and extends vertically. The cavity 311 is suitable for accommodating the aerosol 92 (see Figure 9 ), and one end of the cavity 311 close to the cavity cover 32 is open.

[0070] The cavity cover 32 covers the top open end of the cavity 311. The cavity cover 32 is formed with several air grooves 321 that are arranged in a cooperating and extending manner in a radial (radiating) shape. The air grooves 321 extend in opposite directions in pairs, and are inclined from top to bottom, so that each air groove 321 penetrates through from top to bottom. Each air groove 321 extends horizontally from the inside to the outside to the outer surface of the cavity cover 32. The air grooves 321 are used to connect the cavity 311 to the outside, so that external gas can flow into the cavity 311.

[0071] Refer to Figure 1 , 4 , 5, the ultrasonic oscillation unit 4 is adapted to atomize the liquid agent 91. The ultrasonic oscillation unit 4 includes a fixing member 41 disposed on the outer surface of the cavity base 31, and a ultrasonic oscillator 42 inserted into the fixing member 41 and inserted into the cavity unit 3. The ultrasonic oscillator 42 is, for example, a ultrasonic oscillator 42 that can form oscillations with piezoelectric ceramics.

[0072] The ultrasonic oscillator 42 protrudes into the cavity 311 as shown in Figure 4 , 5 , and is laterally spaced from a center line L11 of the cavity unit 3, and extends obliquely from top to bottom. That is to say, the ultrasonic oscillator 42 is inserted into the cavity base 31 eccentrically on one side. The ultrasonic oscillator 42 is provided with an internal channel 420, and an inlet end 421 and an outlet end 422 located on two opposite sides of the internal channel 420. The inlet end 421 is fluidly connected to the liquid storage unit 21 of the liquid storage device 2 through a pipeline. The outlet end 422 is lower than the inlet end 421, and is located in the cavity 311 of the cavity unit 3, and the outlet end 422 defines a nozzle opening 423 around it (see Figure 5 ).

[0073] Refer to Figure 4 , 5 , the nozzle unit 5 includes a nozzle assembly 51 inserted into the bottom of the cavity base 31, a nozzle outer sleeve 52 sleeved outside the nozzle assembly 51, and a first joint 53 (see Figure 4 ) and a second joint 54 (see Figure 5 ) respectively connecting the nozzle assembly 51 and the nozzle outer sleeve 52.

[0074] The nozzle assembly 51 is provided with a nozzle seat 55 located at the bottom of the cavity 311 and abutting against the cavity base 31, and an inner tube 56 and an outer tube 57 that are integrally connected to the nozzle seat 55 and are sleeved inside and outside each other and are in a circular tube shape.

[0075] Refer to Figure 4 , 5, 6. The middle part of the top wall of the nozzle seat 55 is integrally connected to the top end of the inner tube 56. The middle part of the bottom wall of the nozzle seat 55 is integrally connected to the top end of the outer tube 57. The nozzle seat 55 defines a first air inlet space 551 located between the top wall and the bottom wall up and down. The first air inlet space 551 communicates with the inner space of the outer tube 57.

[0076] The top end of the inner tube 56 is connected to the top wall of the nozzle seat 55. The inner tube 56 is inserted into the first air inlet space 551, protrudes downward from the bottom wall of the nozzle seat 55, and protrudes into the outer tube 57. The nozzle assembly 51 defines a first flow channel 561 with the inner tube 56, a first opening 562 that communicates the top end of the first flow channel 561 with the chamber 311 of the cavity unit 3, and a communication nozzle 563 located at the bottom end of the first flow channel 561 and communicating with the inner space of the outer tube 57.

[0077] The first flow channel 561 is adapted to allow the aerosol 92 to flow in a vertically upward and downward extending flow direction D11. The top part of the first flow channel 561 gradually narrows from top to bottom along the flow direction D11. In other embodiments of the present invention, the flow direction D11 is not limited to the vertically upward and downward extending direction, and the flow direction D11 can vary according to the direction in which the aerosol 92 needs to be ejected.

[0078] Refer to Figure 5 , 6 , 7. The outer tube 57 extends downward integrally from the bottom wall of the nozzle seat 55, and is provided with an insertion tube portion 571 inserted into the cavity seat 31, a threaded tube portion 572 located below the cavity seat 31 for screwing the nozzle jacket 52, and an extension tube portion 573 extending downward from the threaded tube portion 572.

[0079] The insertion tube portion 571, the threaded tube portion 572, and the extension tube portion 573 cooperate to define a second flow channel 574 for inserting one end of the inner tube 56. The second flow channel 574 and the first flow channel 561 cooperate to form a first channel 58. The first channel 58 is fluidly connected to the chamber 311 of the cavity unit 3 and the outside of the cavity unit 3, for ejecting the aerosol 92 from the chamber 311.

[0080] The insertion tube portion 571 is provided with an outer tube inlet 575 (see Figure 6 ) located at the top end of the second flow channel 574 and communicating with the first air inlet space 551. The extension tube portion 573 is located in the nozzle jacket 52, and the extension tube portion 573 is provided with a second opening 576 located at the bottom end of the second flow channel 574. The second opening 576 is adapted to eject the aerosol 92, and is located at two opposite ends of the first channel 58 respectively with the first opening 562.

[0081] Refer toFigure 5 , 7 , 8. The top part inside the nozzle jacket 52 is screwed onto the threaded pipe part 572 of the outer pipe 57. A second air inlet space 521 is provided at the middle part inside the nozzle jacket 52. At the bottom part inside the nozzle jacket 52, there is a second channel 522 for the extension pipe part 573 of the outer pipe 57 to be inserted, and a third opening 523 at the bottom of the second channel 522.

[0082] Refer to Figure 5 , 7 , 8. The nozzle jacket 52 can rotate relative to the outer pipe 57 of the nozzle assembly 51 and move up and down, thereby changing the relative position between the third opening 523 and the second opening 576. For example, the third opening 523 can be at the same height as the second opening 576 as shown in Figure 7 . The third opening 523 can also be higher than the second opening 576 as shown in Figure 8 . Of course, in practice, the third opening 523 can also be lower than the second opening 576.

[0083] Refer to Figure 1 , 4 , 5. The first joint 53 is inserted onto the nozzle seat 55 of the nozzle assembly 51 as shown in Figure 4 for the gas supply unit 6 to input gas into the first air inlet space 551. The second joint 54 is connected to the middle part of the nozzle jacket 52 and supplies the gas supply unit 6 to input gas into the second air inlet space 521.

[0084] The gas supply unit 6 is provided with a first gas source 61 and a second gas source 62 spaced apart from each other, a first pipeline 63 (see Figure 4 ) fluidly connected between the first gas source 61 and the first joint 53, and a second pipeline 64 (see Figure 1 ) fluidly connected between the second gas source 62 and the second joint 54.

[0085] The first gas source 61 and the second gas source 62 are gas sources capable of forming positive pressure, such as: air pumps or high-pressure gas cylinders. In other embodiments of the present invention, the first gas source 61 and the second gas source 62 can also be integrated together. That is to say, the gas supply unit 6 can only include one gas source, and the gas source is connected to the first pipeline 63 and the second pipeline 64 through a pipeline and an electro-pneumatic proportional valve to supply gas to flow into the first pipeline 63 and the second pipeline 64 simultaneously or selectively.

[0086] Refer to Figure 1 , 46. The first pipeline 63 allows a first gas G11 from the first gas source 61 to flow into the first air inlet space 551, then through the outer pipe inlet 575, flow between the outer side of the inner pipe 56 and the inner side of the outer pipe 57, and flow in the first channel 58 along the flow direction D11 (i.e., the direction from the first opening 562 to the second opening 576), and finally flow out from the second opening 576.

[0087] Refer to Figure 1 、 5 7. The second pipeline 64 allows a second gas G12 from the second gas source 62 to flow into the second air inlet space 521, then flow in the second channel 522 along the flow direction D11 and flow between the inner side of the nozzle jacket 52 and the outer side of the outer pipe 57, and finally flow out from the third opening 523.

[0088] Refer to Figure 6 、 7 9, 10. The spraying device 1 can be used to implement a spraying method M1 as shown, for example, Figure 10 . The spraying method M1 is applicable to suck the aerosol 92 in the chamber 311 of the cavity unit 3 from the first opening 562 of the nozzle unit 5 and spray it out from the second opening 576 of the nozzle unit 5. The spraying method M1 includes an aerosol forming step S1 and an aerosol spraying step S2.

[0089] Refer to Figure 1 、 9 10. In the aerosol forming step S1, the liquid agent 91 stored in the liquid storage unit 21 will be pushed by the positive pressure gas provided by the pushing unit 22 and flow from the liquid storage unit 21 to the ultrasonic oscillator 42 of the ultrasonic oscillation unit 4. Then, the liquid agent 91 flows through the internal channel 420 of the ultrasonic oscillator 42 to the chamber 311 of the cavity unit 3 and is oscillated by the ultrasonic oscillator 42, and is transformed from a liquid into droplets suspended in gas at the nozzle opening 423, and then the aerosol 92 is formed in the chamber 311. That is to say, the aerosol 92 is formed by the liquid agent 91 being oscillated by the ultrasonic oscillation unit 4.

[0090] Refer to Figure 6 、 7 9, 10. The aerosol spraying step S2 includes three sub - steps, namely a first input step S21, a second input step S22, and a third input step S23.

[0091] In the first input step S21, the first gas G11 flows horizontally into the first gas inlet space 551, and a first air flow F11 is formed during the process of gradually flowing downward toward the second flow channel 574 of the outer tube 57. After the first gas G11 enters the outer tube 57, it will flow along the flow direction D11 (i.e., from the first opening 562 toward the second opening 576) between the outer side of the inner tube 56 and the inner side of the outer tube 57, and flow past the communication nozzle 563 of the inner tube 56. In this way, the aerosol 92 in the chamber 311 will be sucked into the first flow channel 561 of the inner tube 56 from the first opening 562 of the inner tube 56 due to the pressure difference, and then flow into the second flow channel 574 of the outer tube 57 through the communication nozzle 563.

[0092] In the second input step S22, the second gas G12 flows horizontally into the second gas inlet space 521, and a second air flow F12 is formed during the process of gradually flowing downward toward the second channel 522. After the second gas G12 flows into the second channel 522, it will flow along the flow direction D11 between the outer side of the outer tube 57 and the inner side of the nozzle jacket 52, and finally flow out from the third opening 523 of the nozzle jacket 52. Since the space between the outer tube 57 and the inner tube 56 is annular, the second gas G12 will form an annular or tubular air flow after leaving the third opening 523 under the action of inertial force during the flow, so as to produce the effect of restricting the spraying range of the aerosol 92 sprayed from the second opening 576.

[0093] Refer to Figure 7 、 8 , by adjusting the position of the nozzle jacket 52 relative to the outer tube 57, the spraying range of the aerosol 92 can be controlled. Specifically, when the third opening 523 is relatively higher than the second opening 576 as shown in Figure 8 , the spraying range of the aerosol 92 is wider, and when the third opening 523 is at the same height as or lower than the second opening 576 (not shown in the figure) as shown in Figure 7 , the spraying range of the aerosol 92 is narrower.

[0094] Refer to Figure 2 、 9 、10, in the third input step S23, when the aerosol 92 is continuously sprayed, the air outside the cavity unit 3 will be sucked into the chamber 311 through the air slots 321 of the cavity cover 32. Due to the radial arrangement and the up-and-down inclined extension mode of the air slots 321, several third gases G13 will be generated from the air flowing in from outside the cavity unit 3 and form a vortex air flow F13. The vortex air flow F13 can assist in taking the aerosol 92 formed at the nozzle opening 423 away, and assist in taking the aerosol 92 to the first opening 562 of the nozzle unit 5.

[0095] Among them, the first input step S21, the second input step S22, and the third input step S23 can be executed successively or simultaneously, as long as they are all executed together when actually spraying the workpiece 93.

[0096] Refer to Figure 9 、 11 , in other embodiments of the present invention, in order to maintain a certain concentration of the aerosol 92 ejected, an aerosol balancing step S3 can be performed in the aerosol ejection step S2. In the aerosol balancing step S3, the concentration of the aerosol 92 in the chamber 311 changes from an initial concentration to a concentration close to or meeting a predetermined concentration. In other embodiments of the present invention, the aerosol balancing step S3 can also be performed together with the aerosol ejection step S2. After the concentration of the aerosol 92 changes to a concentration close to or meeting the predetermined concentration, the aerosol 92 is then officially sprayed onto the workpiece 93. That is to say, it can be sprayed empty for a period of time first, and when the concentration of the aerosol 92 meets the requirements, the aerosol 92 is then officially sprayed onto the workpiece 93.

[0097] Refer to Figure 12 、 13 、14, the spraying device 1 in a second embodiment of the spraying method and spraying device of the present invention is similar to the spraying device 1 in the first embodiment. The difference lies in that the liquid storage device 2 matched with the spraying device 1 is different, and the spraying device 1 is also provided with a liquid supply unit 7 inserted on the chamber seat 31 of the cavity unit 3. In addition, the ultrasonic oscillation unit 4 and the chamber cover 32 of the cavity unit 3 are also different.

[0098] Refer to Figure 12 、 15 、16, the liquid storage unit 21 of the liquid storage device 2 is in fluid communication with the liquid supply unit 7. The liquid supply unit 7 is provided with a liquid supply channel 71 (see Figure 16 ) through which the liquid agent 91 can flow, and the liquid agent 91 can be provided to the outlet end 422 of the ultrasonic oscillator 42 of the ultrasonic oscillation unit 4. The ultrasonic oscillation unit 4 further includes a positive pressure gas source 43. The positive pressure gas source 43 can supply gas and input the gas into the chamber 311 from the nozzle 423 through the internal channel 420 of the ultrasonic oscillator 42. The liquid agent 91 flowing to the outlet end 422 can be oscillated by the ultrasonic oscillator 42 and change from a liquid to droplets suspended in the gas, and be carried away from the outlet end 422 by the gas flowing out of the nozzle 423, and the aerosol 92 is formed in the chamber 311.

[0099] Each of the air grooves 321 of the cavity cover 32 is cylindrical and extends obliquely downward. The air grooves 321 are arranged at intervals in the arc direction, radially spaced from the center line L11 of the cavity unit 3. Each of the air grooves 321 is spaced internally and externally from the outer surface of the cavity cover 32.

[0100] One of the features of this second embodiment is that: another way to form the aerosol 92 is provided, that is, the liquid agent 91 is supplied to the outlet end 422 of the ultrasonic oscillator 42 to form the aerosol 92. In other embodiments of the present invention, the liquid supply unit 7 can also supply the liquid agent 91 to the nozzle 423 of the ultrasonic oscillator 42 or in front of the nozzle 423. At this time, the liquid agent 91 can also be mixed with the gas oscillated by ultrasonic waves to form droplets and be atomized.

[0101] Another feature of this second embodiment is that: the included angle between the extending direction of the internal channel 420 of the ultrasonic oscillator 42 and the extending direction of the liquid supply channel 71 of the liquid supply unit 7 is an acute angle. In this way, it can be avoided that when the included angle exceeds 90 degrees, the liquid agent 91 flowing out of the liquid supply channel 71 is blown back into the liquid supply channel 71 by the gas flowing out of the internal channel 420, so as to ensure the normal atomization operation.

[0102] In summary, the beneficial effects of the spraying method and spraying device of the present invention are as follows: a new spraying method and spraying device are provided, which can directly spray the aerosol 92 onto the workpiece 93 to produce a relatively uniform spraying effect. In addition, by the second gas G12 flowing around the second opening 576, the spraying range after the aerosol 92 is sprayed can be restricted or adjusted, improving the accuracy of the spraying operation.

[0103] The above are only the embodiments of the present invention, and the scope of the patent application of the present invention cannot be limited thereby. Moreover, the aspects of simple equivalent changes and modifications according to the claims and the patent specifications of the present invention should also be covered by the claims of the present invention.

Claims

1. A spraying method, adapted to allow an aerosol in a cavity unit to enter through a first opening of a nozzle unit and to be sprayed out from a second opening of the nozzle unit, characterized in that: The spraying method includes: The mist is inhaled from the first opening and ejected from the second opening through a first gas flowing in a flow direction from the first opening to the second opening.

2. The spraying method according to claim 1, characterized in that: The mist is formed by a liquid being vibrated by an ultrasonic vibration unit.

3. The spraying method according to claim 1, characterized in that: A second gas flowing around the second opening limits the range of the aerosol after it is sprayed out from the second opening.

4. The spraying method according to claim 1, characterized in that: The mist is driven to flow into the first opening by a plurality of third gases flowing from outside the cavity unit into the cavity unit.

5. The spraying method according to claim 4, characterized in that: Several streams of the third gas cooperate to form a vortex airflow.

6. A spraying method, adapted to allow an aerosol in a cavity unit to enter through a first opening of a nozzle unit and to be sprayed out from a second opening of the nozzle unit, characterized in that: The spraying method includes: A second gas flowing around the second opening is used to limit the range of the aerosol after it is sprayed out from the second opening.

7. The spraying method according to claim 6, characterized in that: The mist is inhaled from the first opening and ejected from the second opening through a first gas flowing in a flow direction from the first opening to the second opening.

8. The spraying method according to claim 6, characterized in that: The mist is driven to flow into the first opening by a plurality of third gases flowing from outside the cavity unit into the cavity unit.

9. The spraying method according to claim 8, characterized in that: Several streams of the third gas cooperate to form a vortex airflow that brings the aerosol to the first opening.

10. A spraying device, suitable for spraying an aerosol, characterized in that: include: a cavity unit, adapted to contain the aerosol; a nozzle unit having a first channel for fluid communication with the chamber unit, and a first opening and a second opening respectively located at two opposite ends of the first channel; and An air supply unit can provide a first gas flowing in the first channel along a flow direction from the first opening to the second opening, so that the mist is inhaled from the first opening and sprayed from the second opening.

11. The spraying device according to claim 10, characterized in that: The chamber unit is provided with a chamber and several gas grooves suitable for allowing external gas to flow into the chamber.

12. The spraying device according to claim 11, characterized in that: The air grooves cooperate to extend and be arranged in a radial shape, and each of the air grooves extends up and down in an inclined manner. The air grooves cooperate to allow external gas to flow into the chamber to form a vortex airflow that brings the mist to the first opening.

13. The spraying device according to claim 10, characterized in that: The nozzle unit is provided with a nozzle combination defining the first channel, the first opening and the second opening, and a nozzle jacket sleeved over the nozzle combination, the nozzle jacket being provided with a second channel for inserting the nozzle combination, and the gas supply unit can also provide a second gas flowing in the second channel.

14. The spraying device according to claim 13, characterized in that: The nozzle cover is also provided with a third opening connected to the second channel and used for the second gas to flow out. The nozzle cover moves relative to the nozzle assembly to change the position of the third opening relative to the second opening.

15. The spraying device according to claim 10, characterized in that: The nozzle unit is provided with an outer tube and an inner tube inserted in the outer tube, the inner tube is provided with a first opening connected to the cavity unit and a connecting pipe opening connected to the outer tube, the outer tube is provided with a second opening for the mist to be sprayed out, the first gas flows between the inner tube and the outer tube, and flows past the connecting pipe opening.

16. The spraying device according to claim 15, characterized in that: The inner tube is also provided with a first flow channel connected between the first opening and the connecting pipe port, and the width of the first flow channel is narrowed along the flow direction.

17. The spraying device according to claim 10, characterized in that: It is suitable for use with a liquid agent, wherein the spraying device is further provided with an ultrasonic oscillation unit arranged on the cavity unit, and the ultrasonic oscillation unit is suitable for atomizing the liquid agent.

18. The spraying device according to claim 17, characterized in that: The ultrasonic vibration unit is provided with an ultrasonic oscillator which is inserted on the cavity unit and protrudes into the cavity unit. The ultrasonic oscillator is laterally spaced from a center line of the cavity unit and extends obliquely from top to bottom.

19. The spraying device according to claim 10, characterized in that: Suitable for use with a liquid agent, wherein the spraying device is also provided with a liquid supply unit and an ultrasonic oscillation unit inserted on the cavity unit, the ultrasonic oscillation unit provides gas to flow into the cavity unit, the ultrasonic oscillation unit is provided with an ultrasonic oscillator inserted on the cavity unit and protruding into the cavity unit, the ultrasonic oscillator is provided with an internal channel and an outlet end located on one side of the internal channel, the outlet end is located in the cavity unit and defines a nozzle, the liquid supply unit supplies the liquid agent to the outlet end, the nozzle or in front of the nozzle.

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