US20110214434A1 - Air dryer including vortex tube - Google Patents

Air dryer including vortex tube Download PDF

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Publication number
US20110214434A1
US20110214434A1 US13/123,855 US200913123855A US2011214434A1 US 20110214434 A1 US20110214434 A1 US 20110214434A1 US 200913123855 A US200913123855 A US 200913123855A US 2011214434 A1 US2011214434 A1 US 2011214434A1
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United States
Prior art keywords
air
cool
discharging
tube
hot
Prior art date
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Abandoned
Application number
US13/123,855
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English (en)
Inventor
Sung Woo Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VOSCO VORTEX Tech Ltd
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VOSCO VORTEX Tech Ltd
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Assigned to VOSCO VORTEX TECHNOLOGIES LTD., KIM, SUNG WOO reassignment VOSCO VORTEX TECHNOLOGIES LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, SUNG WOO
Publication of US20110214434A1 publication Critical patent/US20110214434A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/24—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)

Definitions

  • the following disclosure relates to an air dryer, and in particular, to an air dryer including a vortex tube, which circulates cooled and compressed air to supply dry air.
  • a pneumatic system includes intimately combined pneumatic driving devices to appropriately operate the pneumatic driving devices.
  • a pneumatic system includes a pneumatic source, a purification device, a control valve, and the other devices.
  • the pneumatic driving devices convert compressed air energy into mechanical translational kinetic energy or rotational kinetic energy.
  • compressed air generated at a compressor as a pneumatic source, reaches a temperature from about 150° C. to about 250° C. through adiabatic air compression, the compressed air is cooled at a rear cooler, and then, introduced into a tank. Impurities and moisture are removed from the compressed air passing through the tank through a filter functioning as the purification device, the compressed air is decompressed at a pressure control valve, moisture is completely removed from the compressed air through the air dryer, and then, the air is supplied to the pneumatic driving device.
  • Such air dryers are classified into adsorption-type air dryers, absorption-type air dryers, and refrigeration-type air dryers according to a drying method.
  • adsorption-type air dryers moisture saturated in external air is sucked and compressed by a compressor while compressing air, a cooler cools and condenses the compressed air to primarily remove moisture, and moisture of wet air containing saturated water vapor is adsorbed to adsorbent such as silica gel, alumina gel, or synthetic zeolite.
  • Absorption-type air dryers use moisture absorption liquid (lithium chloride water solution and triethylene glycol) to remove moisture.
  • dehumidifying operation of refrigeration-type air dryers wet air containing saturated water vapor is re-condensed through heat exchanging.
  • air dryers of prior art consume a lot of energy.
  • refrigeration-type air dryers pollute the environment with hazardous refrigerant such as CFC or HCFC, and facilities and driving thereof which requires refrigerant recycle are complicated.
  • Vortex tubes invented by French physicist George Ranque in 1933, uses compressed air to cross rapid vortex and slow vortex and separate cool air from hot air, in which the separated cool air is used as refrigerant. Vortex tubes are used for industrial or laboratory spot cooler.
  • the present disclosure provides an air dryer that rotates supplied compressed air in an air drying chamber to remove moisture and impurities from the compressed air using Coanda effect.
  • the present disclosure also provides an air dryer having increased efficiency.
  • an air dryer includes: a compressor; an air drying chamber rotating compressed air supplied from the compressor to remove moisture from the compressed air using Coanda effect force and dry the compressed air, and simultaneously to accelerate and discharge the compressed air; a vortex tube dividing the dried and compressed air, discharged from the air drying chamber, into cool air and hot air, and discharging the cool air and the hot air; and an external discharge member collecting the dried hot air and the dried cool air, discharged from the vortex tube, and discharging the dried hot air and the dried cool air at a constant pressure to the outside.
  • an air dryer in another general aspect, includes: a compressor; a first air drying chamber rotating compressed air supplied from the compressor to remove moisture from the compressed air using Coanda effect and primarily dry the compressed air, and simultaneously, to accelerate and discharge the compressed air; a vortex tube dividing the dried and compressed air, discharged from the first air drying chamber, into cool air and hot air, and discharging the cool air and the hot air; a second air drying chamber rotating the hot air discharged from the vortex tube to remove moisture from the hot air using the Coanda effect and secondarily dry the hot air, and to accelerate the hot air and discharge the accelerated hot air together with the cool air discharged from the vortex tube; and an external discharge member collecting the dried hot air and the dried cool air, discharged from the second air drying chamber, and discharging the dried hot air and the dried cool air at a constant pressure to the outside.
  • the air dryer including the vortex tube circulates supplied air as refrigerant to cool hot air and collect cool air and hot air, thus improving efficiency of the air dryer without environmental pollution.
  • the air dryer including the vortex tube removes moisture and impurities through multi processes to obtain dry air.
  • an expensive device such as an after-cooler is not required.
  • Compressed air is used as refrigerant, unlike a refrigerant-type air dryer using refrigerant, thereby reducing production costs and facilitating driving of the air dryer.
  • the air dryer including the vortex tube stores obtained dry air in the air storing tank to control the driving of the compressor according to the amount of used dry air, thus preventing power consumption due to unnecessary driving of the compressor.
  • FIG. 1 is a schematic view illustrating an air dryer according to an embodiment of the present invention.
  • FIG. 2 is a perspective view illustrating an air discharging tube according to the embodiment of FIG. 1 .
  • FIG. 3 is a schematic view illustrating rotation wings of an external discharge part according to the embodiment of FIG. 1 .
  • FIG. 4 is a schematic view illustrating operation of a vortex tube according to an embodiment of the present invention.
  • FIG. 5 is a schematic view illustrating an air dryer according to another embodiment of the present invention.
  • FIG. 6 is a schematic view illustrating connection between a first EVA tuba and a second EVA tube according to an embodiment of FIG. 5 .
  • FIG. 1 is a schematic view illustrating an air dryer according to an embodiment of the present invention.
  • the air dryer includes a compressor (not shown), an air drying chamber 100 , the vortex tube 200 , and an external discharge part 300 .
  • the air drying chamber 100 rotates compressed air supplied from the compressor to remove moisture and impurities from the compressed air using Coanda effect and dry the compressed air, and simultaneously, to accelerate and discharge the compressed air to the vortex tube 200 .
  • the upper portion of the air drying chamber 100 has a cylindrical shape provided with an oblique and cylindrical injection port for compressed air, and the lower portion of the air drying chamber 100 has a cone shape to increase the rotation speed of compressed air.
  • the air drying chamber 100 includes an air discharging tube 110 inducing the rotated compressed air to the vortex tube 200 to discharge the air, a spiral ethylene vinyl acetate copolymer (EVA) tube 120 surrounding the air discharge tube 110 to discharge cool air from the vortex tube 200 to the external discharge part 300 , and a moisture discharging part 130 discharging moisture and impurities removed from the compressed air to the outside.
  • EVA ethylene vinyl acetate copolymer
  • the air discharging tube 110 includes a metal mesh 111 primarily cooling moved and compressed air with cool air of the EVA tube 120 , and a spiral cooling coil 112 disposed in the metal mesh 111 to secondarily cool the primarily cooled air, so as to cool compressed air discharged to the vortex tube 200 .
  • the vortex tube 200 divides dried and compressed air discharged from the air drying chamber 100 into cool air and hot air, discharges the cool air to the EVA tube 120 , and discharges the hot air to the external discharge part 300 .
  • the vortex tube 200 includes a rotation chamber (not shown), cooling fins 210 , an adjustment valve 220 .
  • the rotation chamber divides compressed air into hot air and cool air, and separately discharges the hot air and the cool air.
  • the cooling fins 210 cool the discharged hot air.
  • the adjustment valve 220 adjusts the amount of hot air discharged from the rotation chamber to the external discharge part 300 .
  • the external discharge part 300 collects dry cool air discharged from the EVA tube 120 of the air drying chamber 100 , and hot air discharged from the vortex tube 200 , and discharges the cool air and the hot air at a constant pressure to the outside.
  • the external discharge part 300 since the cool air and the hot air are different from each other in pressure, the external discharge part 300 includes a plurality of oblique wing parts 311 that are spaced by a constant distance from each other to collect the cool air and the hot air.
  • the air dryer further includes an air storage tank (not shown) that temporarily stores dry air discharged from the external discharge part 300 to control driving of the compressor according to the amount of used dry air and prevent power consumption due to unnecessary driving of the compressor.
  • the air storage tank includes a pressure sensing part (not shown), a solenoid valve (not shown), and a control member (not shown).
  • the pressure sensing part detects the maximum and minimum set pressures in the air storage tank.
  • the solenoid valve adjusts the amount of air, introduced into the air storage tank, according to pressure variation of dry air stored in the air storage tank.
  • the control member controls driving on/off of the compressor according to sensed pressure in the air storage tank.
  • the rotating air (hereinafter, referred to as a primary vortex) is partially discharged through a hot air outlet 203 , the rest is returned by the adjustment valve 220 to form a secondary vortex in the primary vortex, and is discharged through a cool air outlet 204 on the opposite side to the hot air outlet 203 .
  • vortices moving in opposite directions to each other along the longitudinal direction of the vortex tube 200 occur respectively at the inner and outer portions in the vortex tube 200 .
  • the secondary vortex loses heat, passing through a region having a relatively low pressure in the flow of the primary vortex, and moves to the cool air outlet 204 .
  • the two vortices rotate in an identical direction and at an identical angular velocity. Since the time taken for an air particle of the inner flow (the secondary vortex) to rotate once is the same as the time taken for an air particle of the outer flow (the primary vortex) to rotate once, the actual speed of the inner flow is less than that of the outer flow. The difference in the speed means the loss in kinetic energy. Lost kinetic energy is converted into heat to increase air temperature of the outer flow (the primary vortex) and further decrease air temperature of the inner flow (the secondary vortex).
  • a spiral arrow (moving right) at the outer portion in the vortex tube 200 of FIG. 4 denotes the flow of the primary vortex
  • a spiral arrow (moving left) at the inner portion denotes the flow of the secondary vortex.
  • the compressed air is moved upward through the air discharging tube 110 , introduced into the vortex tube 200 , and divided into hot air and cool air in the vortex tube 200 as described above.
  • the hot air is discharged to the external discharge part 300 .
  • the cool air is introduced into the spiral EVA tube 120 surrounding the air discharging tube 110 , is heat-exchanged with compressed air in the air discharging tube 110 to condense moisture in the compressed air, and is discharged to the external discharge part 300 .
  • the external discharge part 300 collects the cool air and the hot air and discharges them at a constant pressure to the outside through the oblique wing parts 311 that are spaced a constant distance from each other. That is, when the cool air having a high pressure strongly pushes the wing parts 311 , a rotation fan 310 rotates to generate sucking force that attracts the hot air having a low pressure to naturally mix the hot air with the cool air.
  • the air storage tank temporarily stores dry air discharged from the external discharge part 300 to control the driving of the compressor according to the amount of used dry air, thus preventing power consumption due to unnecessary driving of the compressor.
  • the solenoid valve when the pressure sensing part, detecting the maximum and minimum set pressures in the air storage tank, detects the maximum pressure, the solenoid valve is closed to shut off air introduced into the air storage tank, and simultaneously, the control member turns the compressor off. On the contrary, when the pressure sensing part detects the minimum pressure, the solenoid valve is opened to introduce air into the air storage tank, and simultaneously, the control member turns the compressor on.
  • FIG. 5 is a schematic view illustrating an air dryer including the vortex tube 200 , according to another embodiment of the present invention.
  • the air dryer includes a compressor, a first air drying chamber 400 , the vortex tube 200 , a second air drying chamber 500 , and the external discharge part 300 .
  • the first air drying chamber 400 rotates compressed air supplied from the compressor to remove moisture from the compressed air using the Coanda effect and primarily dry the compressed air, and simultaneously, to accelerate and discharge the compressed air.
  • the air dryer according to the current embodiment further includes a first air discharging tube 410 , a first EVA tube 420 , and a first portion of the moisture discharging part 130 .
  • the first air discharging tube 410 induces and discharges the rotated compressed air to the vortex tube 200 .
  • the first EVA tube 420 surrounds the first air discharging tube 410 to move cool air, discharged from the vortex tube 200 , to the second air drying chamber 500 .
  • the first portion of the moisture discharging part 130 primarily discharges moisture, removed from the compressed air, to the outside.
  • the vortex tube 200 divides compressed dry air discharged from the first air drying chamber 400 into cool air and hot air, discharges the cool air to the first air drying chamber 400 , and discharges the hot air to the second air drying chamber 500 .
  • the vortex tube 200 includes a rotation chamber (not shown) and the adjustment valve 220 .
  • the rotation chamber divides compressed air into hot air and cool air, and separately discharges the hot air and the cool air.
  • the adjustment valve 220 adjusts the amount of hot air discharged from a connection pipe to the second air drying chamber 500 .
  • the second air drying chamber 500 rotates hot air discharged from the vortex tube 200 to remove moisture from the hot air using the Coanda effect and secondarily dry the hot air, and simultaneously, to accelerate the hot air and discharge the accelerated hot air together with cool air discharged from the vortex tube 200 .
  • the air dryer according to the current embodiment further includes a second air discharging tube 510 , a spiral second EVA tube 520 , and a second portion of the moisture discharging part 130 .
  • the second air discharging tube 510 induces and discharges the rotated hot air to the external discharge part 300 .
  • the second EVA tube 520 surrounds the second air discharging tube 510 to move cool air, discharged from the first air drying chamber 400 , to the external discharge part 300 .
  • the second portion of the moisture discharging part 130 secondarily discharges moisture, removed from the hot air, to the outside.
  • the upper portions of the first and second air drying chambers 400 and 500 have cylindrical shapes provided with inclined injection ports for compressed air or hot air, and the lower portions of the first and second air drying chambers 400 and 500 have cone shapes to increase the rotation speed of compressed air or hot air.
  • each of the first and second air discharging tubes 410 and 510 of the first and second air drying chambers 400 and 500 includes the metal mesh 111 primarily cooling moved and compressed air or heat air with cool air of the first and second EVA tubes 420 and 520 , and the spiral cooling coil 112 disposed in the metal mesh 111 to secondarily cool the primarily cooled compressed air or hot air.
  • first and second air drying chambers 400 and 500 connect the first and second EVA tubes 420 and 520 to each other, cool air flows through the first and second EVA tubes 420 and 520 .
  • the first and second EVA tubes 420 and 520 may be connected to each other such that cool air moves from the upper portion of the first EVA tube 420 to the lower portion thereof, and then, moves from the lower portion of the second EVA tube 520 to the upper portion thereof.
  • the first and second EVA tubes 420 and 520 may be connected to each other such that cool air moves from the lower portion of the first EVA tube 420 to the upper portion thereof, and then, moves from the lower portion of the second EVA tube 520 to the upper portion thereof.
  • the external discharge part 300 collects dry cool air and hot air discharged from the second air drying chamber 500 and discharges the cool air and the hot air at a constant pressure to the outside. Since the cool air and the hot air are different from each other in pressure, the external discharge part 300 includes the rotation fan 310 provided with the oblique wing parts 311 that are spaced a constant distance from each other to collect the cool air and the hot air, as illustrated in FIG. 3 .
  • the air dryer according to the current embodiment further includes an air storage tank that is the same as that of the previous embodiment, and thus, a description thereof will be omitted.
  • the compressed air when compressed air discharged from the compressor is introduced through the oblique injection port of the first air drying chamber 400 , the compressed air starts to rotate.
  • the upper portion of the first air drying chamber 400 has a cylindrical shape, and the lower portion has a cone shape that quickly decreases in width.
  • the compressed air rotating and moving downward along the cylindrical shape, is gradually accelerated, and the Coanda phenomenon occurs. Accordingly, moisture and impurities included in the compressed air are adsorbed to a wall surface of the first air drying chamber 400 , and dropped to the moisture discharging part 130 by gravity.
  • the compressed air is moved upward through the first air discharging tube 410 , is introduced into the vortex tube 200 , and is divided into hot air and cool air in the vortex tube 200 as described above.
  • the hot air is discharged to the second air drying chamber 500 .
  • the cool air is introduced into the first spiral first EVA tube 420 surrounding the first air discharging tube 410 , is heat-exchanged with compressed air in the first air discharging tube 410 to condense moisture in the compressed air, and is discharged to the second EVA tube 520 of the second air drying chamber 500 .
  • the hot air discharged from the vortex tube 200 is introduced through the oblique injection port, the hot air starts to rotate in the second air drying chamber 500 .
  • the upper portion of the second air drying chamber 500 has a cylindrical shape, and the lower portion has a cone shape that quickly decreases in width, like the first air drying chamber 400 .
  • the hot air, rotating and moving downward along the cylindrical shape is gradually accelerated, and the Coanda phenomenon occurs. Accordingly, moisture and impurities included in the hot air are adsorbed to a wall surface of the second air drying chamber 500 , and dropped to the moisture discharging part 130 by gravity.
  • Cool air discharged from the first EVA tube 420 of the first air drying chamber 400 is heat-exchanged with hot air in the second air discharging tube 510 through the second EVA tube 520 .
  • the cool air and the hot air are discharged, as warm air, to the external discharge part 300 .
  • the external discharge part 300 collects the cool air and the hot air and discharges them at a constant pressure to the outside through the oblique wing parts 311 that are spaced a constant distance from each other. That is, when the cool air having a high pressure strongly pushes the wing parts 311 , the rotation fan 310 rotates to generate sucking force that attracts the hot air having a low pressure to naturally mix the hot air with the cool air.
  • the discharge amount of dry air including hot air and cool air is greater than that of a single type of dry air, that is, of only cool air or only hot air, the efficiency of the air dryer is improved.
  • the air storage tank temporarily stores dry air discharged from the external discharge part 300 to control the driving of the compressor according to the amount of used dry air, thus preventing power consumption due to unnecessary driving of the compressor.
  • a solenoid valve is closed to shut off air introduced into the air storage tank, and simultaneously, a control member turns the compressor off.
  • the solenoid valve is opened to introduce air into the air storage tank, and simultaneously, the control member turns the compressor on.
  • dry air is efficiently supplied without refrigerant, which may be applied to medical fields, measurement/control appliances, powder coating fields, pneumatic fields, and sand blasting fields.
  • air dryer will be widely and actively applied to machine tools, pneumatic and air cylinders, automatic processes, typical painting, precise painting, measurement facilities, fiber industries, raw material transport, powder painting, precise part drying lines, semiconductor electronic devices, medicine industries, ultra-precise industries, chemical industries, medical industries, optical industries, food industries, and dairies.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Gases (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
US13/123,855 2008-10-24 2009-10-13 Air dryer including vortex tube Abandoned US20110214434A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2008-0104873 2008-10-24
KR1020080104873A KR100901741B1 (ko) 2008-10-24 2008-10-24 볼텍스 튜브를 이용한 공기 건조기
PCT/KR2009/005873 WO2010047490A2 (en) 2008-10-24 2009-10-13 Air dryer including vortex tube

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US20110214434A1 true US20110214434A1 (en) 2011-09-08

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US (1) US20110214434A1 (no)
JP (1) JP2011514840A (no)
KR (1) KR100901741B1 (no)
CN (1) CN102202765A (no)
CA (1) CA2740985A1 (no)
MX (1) MX2011004365A (no)
WO (1) WO2010047490A2 (no)

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CN113457357A (zh) * 2021-05-27 2021-10-01 中国石油天然气股份有限公司西南油气田分公司重庆气矿 一种用于三甘醇脱水的尾气除臭工艺及装置

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CN103341302A (zh) * 2013-07-03 2013-10-09 无锡宇吉科技有限公司 恒压空气降温装置
CN104174261A (zh) * 2014-08-19 2014-12-03 东南大学 基于涡流管制冷技术的压缩空气干燥装置及其工作方法
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CN105056716B (zh) * 2015-07-31 2017-07-28 郭应辉 干燥过滤装置
KR101673401B1 (ko) * 2015-08-13 2016-11-07 오장섭 음식물 처리기용 송풍장치
CN105126459B (zh) * 2015-09-30 2017-01-18 河南科技大学 一种基于涡流管原理的空气净化装置
CN105498462B (zh) * 2015-11-27 2017-11-17 浙江大学 一种液体除湿联合涡流管的低温气流输出装置及粉碎系统
CN106016733A (zh) * 2016-05-06 2016-10-12 浙江大学 一种带有涡流管的干手装置
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CN108413108A (zh) * 2018-05-11 2018-08-17 苏州胜璟电磁科技有限公司 一种气动电磁阀
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WO2010047490A2 (en) 2010-04-29
CA2740985A1 (en) 2010-04-29

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