Mixing jet pump

Abstract

The present invention provides a hybrid jet pump that sprays and applies a viscous liquid in fine particle form to a material. The hybrid jet pump efficiently sprays fine particles of the viscous liquid according to the various properties of the viscous liquid, ranging from low to high viscosity. By spraying a mixture of fine particles and aerosol particles, the pump improves the quality of the particle application process.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2021-0191186 filed in the Korean Intellectual Property Office on December 29, 2021, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] One or more embodiments of the present disclosure relate to a mixing jet pump, and more particularly, to a mixing jet pump capable of spraying and applying a viscous liquid in a fine particle state to a material. Background Art

[0004] Due to the 4th industry and the demand for thinner and lighter flexible printed circuit board (FPCB) components, printed circuit boards (PCBs) are rapidly developing towards miniaturization, weight reduction, and high functionality. PCBs require new technologies, design techniques, miniaturization, high integration, and reliable high-density mounting technologies. Electronic printing can significantly reduce production costs and investment costs by replacing existing production methods of repeated exposure and etching with direct printing methods. The number of general production and processes can be reduced through electronic printing technology, and development time and development costs can be reduced. Specifically, the printing method in the field of electronic printing can produce flexible / rigid PCBs and FPCBs by printing the desired pattern and simultaneously through the line pattern formed by development, etching, and peeling.

[0005] As electronic products are manufactured in thinner and smaller sizes, demand for flexible / rigid PCBs and FPCBs, manufactured in the field of printed electronics, is rapidly increasing. Generally, in PCB manufacturing, problems arise with adhesive filling between copper patterns due to the application of thin coverlays. This can lead to problems such as short circuits and migration in FPCBs, particularly due to the coverlay adhesive layer being too thin to cover the copper patterns.

[0006] Etching and resist stripping of flexible / rigid PCBs and FPCBs manufactured in the field of printed electronics is a process of removing the copper foil of non-circuit parts on the surface of the original panel used for the internal layer to form the circuit, on the surface of which the circuit has been printed by a photoelectric printing method and a screen printing method with highly corrosive chemicals, and then stripping off the dry film used to prevent corrosion of the circuit parts. However, since the FPCB has a structure in which copper is attached to a film, there are differences in the shrinkage rate of each panel, and when 100 products are manufactured using one main film (hereinafter referred to as M / F), uniformity occurs depending on the shrinkage rate of the M / F. Therefore, there may be problems such as deflection between layers during lamination. If a thick dry film is applied, undercutting of the copper foil occurs and there is a limit to the width of the fine lines that can be achieved.

[0007] If a viscous liquid can be applied to the correct location with a fine line width and precise volume using a pump, the productivity of the shielding film forming process can be improved. Furthermore, compared to existing processes, undercutting of the copper foil circuit can be prevented and squareness can be achieved, which can reduce the skin effect at high frequencies and improve characteristics.

[0008] Therefore, an electronic ink printing method (ie, a method of ejecting a viscous liquid) is widely used to form patterns of semiconductor packages and electromagnetic wave shielding films in various technical fields including semiconductors.

[0009] In fields such as electronic printing, technologies that can accurately and precisely coat and eject viscous liquids with fine line widths are needed. In addition, technologies that can coat viscous liquids with various properties and viscosities are needed depending on the application requirements, depending on the application requirements. Summary of the Invention

[0010] One or more embodiments of the present disclosure provide a mixing jet pump capable of efficiently and accurately jetting viscous liquids having various viscosities to generate fine particles as needed and accurately and precisely coating the fine particles.

[0011] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments of the disclosure.

[0012] According to one or more embodiments of the present disclosure, a mixing jet pump includes: a chamber in which a viscous liquid is stored; a vibrator installed in the chamber to atomize the viscous liquid by transmitting vibration to the viscous liquid inside the chamber to generate an aerosol; an ejector installed inside the chamber to mix the viscous liquid inside the chamber with pressurized gas and eject the viscous liquid in a fine particle state; a mixing tube connected to the chamber to transmit fine particles of the viscous liquid in an aerosol state and the viscous liquid in a jet state inside the chamber to the outside; and a nozzle connected to the mixing tube and ejecting fine particles of the viscous liquid through the nozzle.

[0013] According to one or more embodiments of the present disclosure, a mixing jet pump includes: an aerosol chamber in which a viscous liquid is stored; a vibrator installed in the aerosol chamber to atomize the viscous liquid by transmitting vibration to the viscous liquid inside the aerosol chamber to generate an aerosol; a spray chamber in which the viscous liquid is stored; an ejector installed inside the spray chamber to mix the viscous liquid inside the spray chamber with compressed gas and spray the viscous liquid in a fine particle state; a mixing tube connected to each of the aerosol chamber and the spray chamber to mix the viscous liquid in an aerosol state inside the aerosol chamber with the viscous liquid in a spray state inside the spray chamber and transmit them to the outside; and a nozzle connected to the mixing tube and spraying fine particles of the viscous liquid through the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 Schematic diagram of a mixing jet pump according to an embodiment of the present disclosure.

[0016] Figure 2 Schematic diagram of a mixing jet pump according to another embodiment of the present disclosure.

[0017] Explanation of Figure Numbers

[0018] 101: chamber;

[0019] 102: injection chamber;

[0020] 103: aerosol chamber;

[0021] 110: chamber gas supply pipe;

[0022] 111, 721: chamber gas valve;

[0023] 200, 210: vibrator;

[0024] 300, 600: ejector;

[0025] 310, 610: injection gas supply pipe;

[0026] 311, 611: injection gas valve;

[0027] 320, 620: liquid supply pipe;

[0028] 330, 630: injection pipe;

[0029] 400, 800: mixing tube;

[0030] 410, 810: mixing valve;

[0031] 450: Virtual Impactor;

[0032] 451: Virtual impactor valve;

[0033] 510: nozzle;

[0034] 530: sheath nozzle;

[0035] 531: sheath valve;

[0036] 720: Gas chamber supply pipe. DETAILED DESCRIPTION

[0037] Reference will now be made in detail to the embodiments, examples of which are shown in the accompanying drawings, wherein like reference numerals refer to like elements throughout the text. In this regard, the present embodiment may have different forms and should not be construed as being limited to the description set forth herein. Therefore, these embodiments are described below only with reference to the accompanying drawings to explain various aspects of the present description. As used herein, the term "and / or" includes any and all combinations of one or more of the associated enumerated items. When preceding a list of elements, expressions such as "at least one of" modify the entire list of elements rather than the individual elements of the list.

[0038] Hereinafter, with reference to the accompanying drawings, a hybrid jet pump according to an embodiment of the present disclosure will be described.

[0039] Figure 1 Schematic diagram of a mixing jet pump according to an embodiment of the present disclosure.

[0040] refer to Figure 1 The mixing jet pump according to this embodiment includes a chamber 101 , a vibrator 200 , an ejector 300 , a mixing pipe 400 , and a nozzle 510 .

[0041] The viscous liquid is stored in the chamber 101. The chamber 101 is formed in the form of a container capable of storing the viscous liquid and is formed in a closed structure.

[0042] Vibrator 200 is installed in chamber 101 and transmits vibrations to the viscous liquid inside chamber 101. In this embodiment, vibrator 200 uses an ultrasonic vibrator. Vibrator 200 transmits vibrations to the viscous liquid to atomize the viscous liquid and convert it into an aerosol state. By using this type of vibrator 200, even highly viscous liquids can be easily converted into a fine particle state. By using this fine particle aerosol, it is possible to form fine patterns with precise line widths on the material. Therefore, vibrator 200 and chamber 101 perform the function of an atomizer that generates the aerosol.

[0043] The ejector 300 is installed inside the chamber 101 together with the vibrator 200. The ejector 300 has the same structure as a general ejector. That is, the ejector 300 is configured to eject the viscous liquid into a fine particle state by mixing compressed gas supplied from the outside of the chamber 101 with the viscous liquid inside the chamber 101.

[0044] In this embodiment, the ejector 300 includes an ejection gas supply pipe 310, a liquid supply pipe 320, and an ejection pipe 330. The ejection gas supply pipe 310 is a pipe through which compressed gas is supplied. The ejection gas supply pipe 310 is connected to the outside of the chamber 101 and supplies compressed gas to the ejector 300 via a device such as a regulator. One side of the liquid supply pipe 320 is arranged to be immersed in the viscous liquid, and the other side is connected to the ejection gas supply pipe 310. The viscous liquid within the chamber 101 is transferred to the ejection gas supply pipe 310 via the liquid supply pipe 320 and ejected by the compressed gas from the ejection gas supply pipe 310. The viscous liquid, ejected in a fine particle state, is ejected into the chamber 101 via the ejection pipe 330. Therefore, the ejection pipe 330 is connected to the outlet side of the ejection gas supply pipe 310.

[0045] The injection gas valve 311 is installed in the injection gas supply pipe 310. The injection gas valve 311 controls the flow rate of the compressed gas supplied to the injection gas supply pipe 310.

[0046] The mixing jet pump of the present disclosure mixes the aerosol particles generated by the vibrator 200 with the spray particles generated by the sprayer 300 and applies the spray particles through the nozzle 510 as described above.

[0047] A chamber gas supply pipe 110 is connected to the chamber 101. The chamber gas supply pipe 110 supplies gas into the chamber 101. Viscous liquid fine particles inside the chamber 101 are pushed by the gas flowing in the chamber gas supply pipe 110 and discharged into the mixing pipe 400. A chamber gas valve 111 that controls the flow rate is installed in the chamber gas supply pipe 110.

[0048] The mixing tube 400 is connected to the chamber 101 to transfer fine particles of the viscous liquid in an aerosol state and the viscous liquid in a spray state inside the chamber 101 to the outside. A mixing valve 410 that controls the flow rate inside the mixing tube 400 is installed in the mixing tube 400.

[0049] The nozzle 510 is installed at the end of the mixing tube 400. Fine particles of the viscous liquid transferred through the mixing tube 400 are sprayed through the nozzle 510. As described above, the fine particles of the viscous liquid sprayed through the nozzle 510 are applied to a material for the purpose of forming electromagnetic interference (EMI) shielding of electronic components and the like.

[0050] In the case of the hybrid jet pump according to this embodiment, a jacket nozzle 530 is additionally provided. The jacket nozzle 530 is formed to surround a portion of the periphery of the nozzle 510. The jacket nozzle 530 is installed in the nozzle 510 to inject compressed gas into the periphery of fine particles of the viscous liquid ejected from the nozzle 510. The compressed gas injected through the jacket nozzle 530 surrounds the periphery of the viscous liquid ejected through the nozzle 510, helping the viscous liquid to be focused without spreading and applied with high resolution of a fine line width. A jacket valve 531 is installed in the jacket nozzle 530. The jacket valve 531 controls the flow rate of the compressed gas to be discharged into the jacket nozzle 530.

[0051] A virtual impactor (VI) 450 is installed in the mixing tube 400. The virtual impactor 450 increases the density of fine particles flowing into the mixing tube 400. The virtual impactor separates and discharges fine particles that are too small, and in some cases, controls the flow rate of the mixing tube 400 and the concentration of fine particles flowing into the mixing tube 400.

[0052] The control unit controls the operations of the vibrator 200, the injection gas valve 311, the chamber gas valve 111, the mixing valve 410, and the sheath valve 531. The control unit also controls the operation of the virtual impactor 450.

[0053] The control unit controls the operation of the valves and vibrator 200 as described above to control the spray characteristics, such as the density and flow rate of the viscous liquid fine particles sprayed through the nozzle 510. In addition, the control unit controls the operation of the vibrator 200 and the injection gas valve 311 to control the ratio of the aerosol generated by the vibrator 200 and the injection particles generated by the injector 300 among the fine particles of the viscous liquid flowing into the mixing tube 400. In some cases, the control unit can operate the mixing jet pump of this embodiment by operating only one of the vibrator 200 and the injector 300.

[0054] Hereinafter, the operation of the mixing jet pump configured as described above according to an embodiment of the present invention will be described.

[0055] The control unit operates the vibrator 200 of the chamber 101 to atomize the viscous liquid inside the chamber 101. When the vibrator 200 transmits ultrasonic vibrations to the viscous liquid, the viscous liquid becomes an aerosol with extremely small particles. Even when the viscosity of the viscous liquid is high, the vibrator 200 can effectively atomize the viscous liquid. This atomized viscous liquid fills the upper side of the chamber 101.

[0056] Separately, the chamber 101 opens the injection gas supply pipe 310, allowing compressed gas to be supplied to the injection gas supply pipe 310 of the ejector 300. The viscous liquid is drawn through the liquid supply pipe 320 of the ejector 300 by the gas supplied to the injection gas supply pipe 310 and meets the compressed gas. Therefore, the viscous liquid delivered to the ejector 300 through the liquid supply pipe 320 is ejected into a fine particle state by the compressed gas and delivered to the ejection pipe 330. Thus, the fine particles of the viscous liquid ejected from the ejector 300 are supplied to the chamber 101. The control unit controls the amount of fine particles of the viscous liquid ejected from the ejector 300 by operating the injection gas valve 311 installed in the injection gas supply pipe 310.

[0057] The viscous liquid in an aerosol state and fine particles of the sprayed viscous liquid are mixed and stored in the chamber 101 by the vibrator 200 and the sprayer 300 as described above.

[0058] As described above, the chamber gas supply pipe 110 is connected to the chamber 101 so that gas is supplied into the chamber 101. The control unit controls the amount of gas supplied into the chamber 101 by controlling the chamber gas valve 111, which controls the flow rate of the chamber gas supply pipe 110. Aerosol and fine particles inside the chamber 101 are transferred to the mixing pipe 400 by the pressure of the gas flowing into the chamber 101.

[0059] The fine particles of the viscous liquid delivered to the mixing tube 400 are sprayed through the nozzle 510 and applied to the material. At this time, the control unit can control the mixing valve 410 installed in the mixing tube 400 to adjust the spray amount of the fine particles of the viscous liquid injected through the nozzle 510. The line width of the pattern applied to the material can be adjusted according to the amount of the fine particles of the viscous liquid sprayed through the nozzle 510.

[0060] Compressed gas can be sprayed around the nozzle 510 through the sheath nozzle 530, so that the fine particles of the viscous liquid sprayed through the nozzle 510 are concentrated in the center and do not spread to the periphery. The control unit can operate the sheath valve 531 to control the flow rate of the compressed gas (sheath air) sprayed through the sheath nozzle 530 to control the spray characteristics of the viscous liquid sprayed from the nozzle 510.

[0061] At the same time, if Figure 1 As shown in FIG, a virtual impactor 450 is installed in the mixing tube 400. The virtual impactor 450 is used not only to control the flow rate of the mixing tube 400, but also mainly to improve the properties of the fine particles flowing into the mixing tube 400. Fine particles of a relatively large size with sufficient momentum are transferred to the nozzle 510 through the virtual impactor 450, while fine particles of a relatively small size are not transferred to the nozzle 510, but are discharged through the VI discharge pipe connected to the virtual impactor 450. The control unit can control the amount of small fine particles discharged from the virtual impactor 450 by operating the VI valve 451 installed in the VI discharge pipe.

[0062] Since the hybrid jet pump of the present disclosure uses a combination of the vibrator 200 and the ejector 300 to generate fine particles of a viscous liquid, the characteristics of the fine particles generated from the vibrator 200 and the ejector 300 can be controlled depending on the application or purpose. Since the fine particles generated by the vibrator 200 are relatively small and the fine particles generated by the ejector 300 are relatively large, various ejection properties can be achieved by adjusting the mixing ratio of the two types of fine particles. In addition, since the vibrator 200 can effectively atomize high-viscosity liquids and the ejector 300 can effectively atomize low-viscosity liquids, the present disclosure can achieve high-quality application properties by using the combination of the vibrator 200 and the ejector 300 according to the characteristics of the viscous liquid.

[0063] Furthermore, the present disclosure can achieve liquid application properties that go beyond simply combining vibrator 200 and injector 300. During the process of mixing and storing fine particles generated by vibrator 200 and fine particles generated by injector 300 within chamber 101, fine particles of different sizes collide with each other and separate, and the fine particles grow by attaching extremely small fine particles to relatively large fine particles. Thus, fine particles of different sizes interact to produce new fine particle properties beyond simple mixing. Therefore, the present disclosure can produce new fine particle spraying effects that conventional atomizers cannot achieve by adjusting the mixing ratio or size ratio of the two types of fine particles.

[0064] Although preferred examples have been described above with respect to the present disclosure, the scope of the present disclosure is not limited to the forms described and shown above.

[0065] For example, the hybrid jet pump of the above embodiment includes the injection gas valve 311, the chamber gas valve 111, the mixing valve 410, the VI valve 451, the sheath valve 531, etc., but a hybrid jet pump having a structure that does not include some of these valves or further includes other valves can be implemented. In addition, as for the valve, not only the type of valve used to control the flow path can be used, but also various other types of valves can be used, such as a valve that can constantly maintain the flow rate at a preset flow rate by sensing the flow rate in real time.

[0066] In addition, although the hybrid jet pump having a structure including the virtual impactor 450 has been described above as an example, it is also possible to configure a hybrid jet pump having a structure not including the virtual impactor 450 .

[0067] In addition, it is possible to implement a hybrid jet pump having a structure that does not include the jacket nozzle 530, and it is also possible to implement a hybrid jet pump using a different type of jacket nozzle 530 than that shown in the drawings.

[0068] Additionally, the virtual impactor 450 used in the present disclosure may also use various types of virtual impactors other than the types described above.

[0069] Next, refer to Figure 2 A hybrid jet pump according to another embodiment of the present disclosure is described.

[0070] In the case of the hybrid jet pump of this embodiment, unlike the above reference Figure 1 The described mixing jet pump, each of the ejector 600 and the vibrator 210 generates fine particles in separate chambers 102 and 103 , and the generated fine particles are mixed with each other in the mixing tube 800 and delivered to the nozzle 510 without sharing the chamber 101 .

[0071] The vibrator 210 is installed in the aerosol chamber 103. The aerosol generated by the vibrator 210 is stored in the aerosol chamber 103. The aerosol in the aerosol chamber 103 is discharged into the mixing tube 800 through the gas flowing through the gas chamber supply pipe 720 connected to the aerosol chamber 103. The flow rate of the gas chamber supply pipe 720 is controlled by the chamber gas valve 721.

[0072] The ejector 600 is installed in the ejection chamber 102. Figure 1 The ejector 300 of the embodiment of the present invention includes an ejection gas supply pipe 610, a liquid supply pipe 620, and an ejection pipe 630. The flow rate of the ejection gas supply pipe 610 is controlled by an ejection gas valve 611.

[0073] Therefore, the fine particles of the viscous liquid stored in each of the aerosol chamber 103 and the spray chamber 102 are mixed with each other during the process of passing through the mixing tube 800. In some cases, an additional chamber may be provided in the mixing tube 800 to further provide a space in which the two types of fine particles can be mixed with each other.

[0074] The configuration of the virtual impactor 450, mixing valve 810, nozzle 510, jacket nozzle 530 and the like (which is the configuration after the mixing tube 800) is the same as that of the reference Figure 1 The mixing injection pump of the embodiment is the same.

[0075] In the mixing jet pump of this embodiment, since the two types of fine particles mix with each other during the process of passing through the mixing tube 800, the dynamic mixing effect of the two types of fine particles can further increase the mutual collision effect. The flow rate of the mixing tube 800 is controlled by the mixing valve 810.

[0076] The hybrid jet pump of this embodiment may also omit or provide various valve configurations, and the design may be modified by modifying the virtual impactor 450 or the sheath nozzle 530 to a different structure or providing them with additional configurations. The hybrid jet pump of the present disclosure can effectively spray fine particles of viscous liquids in a range of low to high viscosities, depending on the various properties of the viscous liquid. The hybrid jet pump of the present disclosure can improve the quality of the particle application process by spraying a mixture of fine particles and aerosol particles.

[0077] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should generally be considered as applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A mixing jet pump comprising: a chamber in which a viscous liquid is stored; a vibrator installed in the chamber to atomize the viscous liquid to generate an aerosol by transmitting vibration to the viscous liquid inside the chamber; an ejector installed inside the chamber to mix the viscous liquid and compressed gas inside the chamber and eject the viscous liquid in a fine particle state; a mixing tube connected to the chamber to transfer the viscous liquid in an aerosol state and the fine particles of the viscous liquid in a spray state inside the chamber to the outside, wherein the viscous liquid in an aerosol state and the fine particles of the viscous liquid in a spray state are mixed inside the mixing tube; and a nozzle connected to the mixing tube and spraying the fine particles of the viscous liquid through the nozzle, The fine particles of the viscous liquid in the aerosol state are smaller than the fine particles of the viscous liquid in the spray state.

2. The hybrid jet pump according to claim 1, wherein The injector includes a jet gas supply pipe to which the compressed gas is supplied, a liquid supply pipe immersed in the viscous liquid to transfer the viscous liquid to the injection gas supply pipe, and The injection pipe is configured to inject the viscous liquid in the form of fine particles into the chamber when the compressed gas supplied through the injection gas supply pipe meets the liquid supply pipe.

3. The hybrid jet pump according to claim 2 further comprises A sheath nozzle is installed in the nozzle to wrap around the periphery of the nozzle and inject compressed gas into the periphery of the fine particles of the viscous liquid injected from the nozzle.

4. The hybrid jet pump according to claim 2, further comprising A jet gas valve installed in the jet gas supply pipe to adjust the flow rate a mixing valve installed in the mixing pipe to adjust the flow rate, and A control unit is configured to control the operation of each of the vibrator, the injection gas valve, and the mixing valve.

5. The hybrid jet pump according to claim 4, further comprising a chamber gas supply pipe connected to the chamber and supplying gas into the chamber, and a chamber gas valve installed in the chamber gas supply pipe to adjust the flow rate, wherein The control unit controls the operation of the chamber gas valve. The mixing jet pump according to claim 5 , further comprising a dummy impactor installed in the mixing tube.

7. The hybrid jet pump according to claim 3, further comprising a jet gas valve installed in the jet gas supply pipe to adjust the flow rate, A mixing valve, installed in the mixing pipe to adjust the flow rate, a jacket valve installed in the jacket nozzle to adjust a flow rate of the compressed gas flowing through the jacket nozzle, and A control unit is configured to control the operation of each of the vibrator, the injection gas valve, the mixing valve, and the jacket valve.

8. A mixing jet pump comprising: an aerosol chamber in which a viscous liquid is stored; a vibrator installed in the aerosol chamber to atomize the viscous liquid to generate an aerosol by transmitting vibration to the viscous liquid inside the aerosol chamber; a spray chamber in which a viscous liquid is stored; an ejector installed inside the ejection chamber to mix the viscous liquid and compressed gas inside the ejection chamber and eject the viscous liquid in a fine particle state; a mixing tube connected to each of the aerosol chamber and the spray chamber to mix and transfer the viscous liquid in an aerosol state inside the aerosol chamber and the viscous liquid in a spray state inside the spray chamber to the outside; and a nozzle connected to the mixing tube and spraying the fine particles of the viscous liquid through the nozzle, The fine particles of the viscous liquid in the aerosol state are smaller than the fine particles of the viscous liquid in the spray state.

9. The hybrid jet pump according to claim 8, wherein The injector includes a jet gas supply pipe to which the compressed gas is supplied, a liquid supply pipe immersed in the viscous liquid to transfer the viscous liquid to the injection gas supply pipe, and The injection pipe is configured to inject the viscous liquid in the fine particle state into the injection chamber when the compressed gas supplied through the injection gas supply pipe meets the liquid supply pipe. 10 . The mixing jet pump according to claim 9 , further comprising a sheath nozzle installed in the nozzle to wrap around a periphery of the nozzle and spray compressed gas into peripheries of the fine particles of the viscous liquid sprayed from the nozzle.

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