KR20120036169A - A system for spraying dry ice - Google Patents

A system for spraying dry ice Download PDF

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Publication number
KR20120036169A
KR20120036169A KR1020100097893A KR20100097893A KR20120036169A KR 20120036169 A KR20120036169 A KR 20120036169A KR 1020100097893 A KR1020100097893 A KR 1020100097893A KR 20100097893 A KR20100097893 A KR 20100097893A KR 20120036169 A KR20120036169 A KR 20120036169A
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South Korea
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carbon dioxide
thermoelectric module
unit
fluid
dry ice
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KR1020100097893A
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Korean (ko)
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KR101188948B1 (en
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이찬우
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이찬우
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B08B7/0092—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00—Other cooling or freezing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

Dry ice injection system according to the present invention by spraying the dry ice using the carbon dioxide gas stored in the pressure vessel 10 above a certain pressure, the carbon dioxide supply line 101 connected to the pressure vessel 10 is antifreeze A thermoelectric module unit connected to the cooling tank 110 for liquefying carbon dioxide in the carbon dioxide supply line through the contained interior, and the cooling tank 110 and the antifreeze circulation line 132 to cool the antifreeze supplied from the antifreeze circulation line ( 120 and the first pump 130 for circulating the antifreeze in the cooling tank into the cold sink 122 of the thermoelectric module unit and then circulated back into the cooling tank, and liquefied by being connected to the carbon dioxide supply line via the cooling tank. The thermoelectric module unit 1 recovers the vaporization heat generated by the injection unit 140 and the injection unit 140 to inject snow by vaporizing carbon dioxide. After heat dissipating the hot sink 126 of 20), the heat circulating unit 150 to prevent freezing of the injection unit 140 by using the heat dissipation heat of the hot sink, and the thermoelectric module of the thermoelectric module unit 120 are supplied with power. It includes a controller 160 for controlling the output of the thermoelectric module by controlling the polarity of the power supply unit 162 for supplying a.

Description

Dry Ice Spray System {A SYSTEM FOR SPRAYING DRY ICE}

The present invention relates to a dry ice injection system, and more particularly, to produce dry ice by inducing a change of state of carbon dioxide gas compressed to a predetermined pressure or more in a commercial carbon dioxide pressure vessel, and to dry and control the injection state. It relates to an ice spray system.

In general, in the case of carbon dioxide (CO 2 ) gas maintains a gas state at atmospheric pressure, room temperature, but has a property of liquefying above a certain pressure. That is, the liquefaction point is changed according to the pressure and temperature change, Figure 1 shows a state graph according to the pressure and temperature change of the carbon dioxide.

In order to produce dry ice, a process of liquefying gaseous CO 2 gas and vaporizing liquefied CO 2 again through a nozzle is required. In the vaporization process passing through the nozzle, a sudden cooling phenomenon occurs, and the injected CO 2 is injected in a mixture of gas and solid state (dry ice). By adjusting the size and spraying amount of dry ice generated in this process, it can be used to safely clean the minute contaminated parts of precision parts, and it is also possible to use food cooling, sterilizer and local cooler.

Meanwhile, commercially available CO 2 The size of the storage containers varies in size, but the initial charging pressure is filled with a high pressure of more than 50bar. Therefore, the conventional method of producing dry ice (snow) is CO 2 charged at high pressure in a pressure vessel. It was to use dry ice (snow) generated in the process of spraying gas. Referring to Figure 1, in order to generate dry ice at room temperature it is possible in a state filled with a pressure of at least 50bar. In an initial state of charge, dry ice may be realized in the process of spraying a part of the liquefied CO 2 into the container at a high filling pressure even without a separate cooling device at room temperature (around 23 ° C). However, the dry ice implementation is stopped due to the pressure drop (55 bar or less) during the spraying process. Therefore, a function of lowering the liquefaction temperature due to the pressure drop is required by equipping a commercially available CO 2 pressure vessel with a refrigerating device to implement dry ice stably up to a predetermined pressure range (35 bar).

Figure 2 schematically shows a conventional dry ice generator using a pressure vessel. The carbon dioxide supply line 11 is connected to the pressure vessel 10 to supply carbon dioxide, and a heat exchange tube 30 is installed to surround the supply line 11 to cool the carbon dioxide in the middle of the supply line 11. The refrigerant gas flows through the heat exchange tube 30, and the cooling device 20 to which the refrigeration cycle is applied supplies the refrigerant gas to the heat exchange tube 30. Conventional cooling apparatus is a method using an air-cooled freezer, the method of cooling the carbon dioxide supply line 11 to lower the liquefaction pressure. At this time, if the liquefaction temperature is lowered to -20 ℃ ~ -10 ℃, the liquefaction pressure can be lowered up to around 30bar pressure. In this case, the heat transfer area required for cooling should be secured in preparation for the injected CO 2 flow rate.

However, in the conventional method, since the pressure of the carbon dioxide to be supplied is a high pressure, the heat exchange tube 30 is manufactured in such a manner that the carbon dioxide gas passes through the inside and the refrigerant gas circulates outward using a double coaxial metal tube, thereby stably transferring heat. There was a difficulty in securing the area. In addition, since the use of the refrigerant gas is not preferable in terms of environment-friendly, there is a problem that the volume of the device increases depending on the refrigeration cycle application. In addition, the conventional method is difficult to maintain a constant dry ice injection condition according to the pressure change, it does not respond precisely to the change of the state of carbon dioxide, the amount of dry ice is irregular, and also due to the freezing of the injection hose and nozzle during the continuous injection process There is a problem that clogging phenomenon occurs. In order to solve the icing of the nozzle, there is a conventional introduction of a heat insulating material in the injection hose and the nozzle, it is difficult to fundamentally solve only by installing the heat insulating material.

The present invention has been made in view of the above problems, the first object of the present invention is to enable a compact design design by reducing the volume of the entire equipment and dry ice injection system to implement eco-friendly products by using no refrigerant gas To provide. A second object of the present invention is to provide a dry ice injection system for precisely controlling the injection state of dry ice in response to a change in supply pressure of carbon dioxide. It is a third object of the present invention to provide a dry ice spray system for stably supplying dry ice by solving clogging caused by freezing of the spray hose and nozzle during continuous spraying.

Dry ice injection system according to an embodiment of the present invention for achieving the above object, the carbon dioxide supply line 101 connected to the pressure vessel 10 to liquefy the carbon dioxide in the carbon dioxide supply line via the interior containing the antifreeze Cooling tank 110; It is connected by the cooling tank 110 and the antifreeze circulation line 132 to cool the antifreeze supplied from the antifreeze circulation line, and installed on the thermoelectric module 122 and one side of the thermoelectric module, the antifreeze passes through A thermoelectric module unit 120 having a cold sink 124 and a hot sink 126 installed on the other side of the thermoelectric module; A first pump 130 which circulates the antifreeze in the cooling tank into the cold sink of the thermoelectric module unit and then circulates it into the cooling tank again; Connected to the carbon dioxide supply line via the cooling tank to vaporize the liquefied carbon dioxide to spray snow, the vaporizer 142 having a vaporization nozzle 143, the injection line 144 connected to the vaporizer and the end of the injection line An injection unit 140 having a snow nozzle 146 connected thereto; The heat circulation unit recovers vaporization heat generated from the injection unit 140 to dissipate the hot sink of the thermoelectric module unit 120 and prevents freezing of the injection unit 140 by using the heat dissipation heat of the hot sink. 150; And, the controller 160 for controlling the output of the thermoelectric module by controlling the polarity of the power supply unit 162 for supplying power to the thermoelectric module of the thermoelectric module unit 120.

In addition, a pressure sensor 102 for measuring the pressure of the carbon dioxide supplied to the carbon dioxide supply line in front of the cooling tank 110 is installed, the temperature sensor for measuring the temperature of the carbon dioxide to be cooled in the cooling tank 110 ( 105 is installed, the controller 160 receives the pressure information and temperature information from the pressure sensor and the temperature sensor to control the output of the thermoelectric module 122.

The heat circulation unit 150, the water jacket 152 is installed to wrap close to the injection unit 140 and the fluid flows therein; A cooling heat recovery tank 154 for recovering and storing the fluid in the water jacket 152; And, the fluid in the cooling heat recovery tank 154 flows into the hot sink 126 of the thermoelectric module unit 120, the fluid passed through the hot sink flows into the water jacket 152 and then the cooling heat again A second pump 156 for circulating the fluid to recover to the recovery tank.

The fluid heated through the hot sink 126 is a water jacket 152a surrounding the vaporizer 143 by the first distributor 157 and a water jacket 146 surrounding the spray line 144 and the snow nozzle 146. Each separated and introduced, the fluid inside the water jacket 152a surrounding the vaporizer and the fluid inside the water jacket 152b surrounding the spray line and the snow nozzle are combined by the second distributor 158 to provide the cooling heat recovery tank ( 154).

Meanwhile, an air-cooled condenser 170 is installed at the side of the cooling heat recovery tank 154 to drive the fan 172 when the system is initially driven or when the fluid in the cooling heat recovery tank is below a predetermined temperature. A portion of the fluid having passed through 126 passes through the air distributor condenser 170 through the first distributor 157 and flows into the cooling heat recovery tank 154.

Dry ice injection system according to another embodiment of the present invention for achieving the above object, the cooling tank for liquefying the carbon dioxide in the carbon dioxide supply line via the interior of the carbon dioxide supply line 201 connected to the pressure vessel containing the antifreeze ( 210); It is connected by the cooling tank 210 and the antifreeze circulation line 232 to cool the antifreeze supplied from the antifreeze circulation line, the first thermoelectric module 222 and is installed on one side of the first thermoelectric module and the antifreeze A first thermoelectric module unit 220 having a first cold sink 224 passing through the inside and a first hot sink 226 installed on the other side of the first thermoelectric module; A first pump 230 which circulates the antifreeze in the cooling tank 210 into the cold sink 224 of the first thermoelectric module 220 and then flows back into the cooling tank 210; It is connected to the carbon dioxide supply line via the cooling tank 210 to vaporize the liquefied carbon dioxide to inject snow, the vaporizer 242 having a vaporization nozzle 243, the injection line 244 and the injection line connected to the vaporizer An injection unit 240 having a snow nozzle 246 connected to an end of the line; It is installed in front of the injection unit 240 on the carbon dioxide supply line, the second thermoelectric module 282, the second thermoelectric module is installed on one side of the second carbon dioxide supply line is connected to the second through the carbon dioxide A second thermoelectric module unit 280 having a second cold sink 284 and a second hot sink 286 installed on the other side of the second thermoelectric module; After recovering the heat of vaporization generated by the injection unit 240 to dissipate the first hot sink 226 of the first thermoelectric module unit 220, and using the heat radiation of the first hot sink to the injection unit 240 Thermal circulation unit 250 to prevent the freezing of the; And controlling the polarity of the power supply unit 262 for supplying power to the first and second thermoelectric modules 222 and 282 of the first and second thermoelectric module units 220 and 280. Controller 260 for controlling the output of the < RTI ID = 0.0 >

On the carbon dioxide supply line in front of the cooling tank 210, a pressure sensor 202 for measuring the pressure of the carbon dioxide supplied is installed, and the first temperature sensor 205 for measuring the temperature of the carbon dioxide to be cooled inside the cooling tank is A second temperature sensor 206 is installed on the carbon dioxide supply line between the second thermoelectric module unit 280 and the injection unit 240, and the controller 260 is formed of the pressure sensor 102 and the second sensor. The output of the first and second thermoelectric modules 222 and 282 is controlled by receiving pressure and temperature information from the first and second temperature sensors 205 and 206.

The heat circulation unit 250, the water jacket 252 is installed to wrap close to the injection unit 240 and the fluid flows therein; A cooling heat recovery tank 254 for recovering and storing the fluid in the water jacket 252; And, the fluid in the cooling heat recovery tank 254 flows into the first hot sink 226 of the first thermoelectric module unit 220, the fluid passed through the first hot sink the water jacket 252 and the second It includes a second pump (256) for circulating the fluid to flow into the second hot sink (286) of the thermoelectric module unit 280 and to recover it back to the cooling heat recovery tank.

The fluid passing through the first hot sink 226 is a water jacket 252a surrounding the vaporizer 242 by the first distributor 257 and a water jacket 252b surrounding the spray line 244 and the snow nozzle 246. And a fluid inside the water jacket 252a surrounding the vaporizer and the fluid inside the water jacket 252b surrounding the spray line and the carburetor and the second hot sink 286 respectively separated and introduced into the second hot sink 286. The fluid passed through is combined by the second distributor 258 and flows into the cooling heat recovery tank 254.

Meanwhile, an air-cooled condenser 270 is installed at the side of the cooling heat recovery tank 254 to drive the fan 272 when the system is initially driven or when the fluid in the cooling heat recovery tank is below a certain temperature. A portion of the fluid heated through the hot sink 226 is introduced into the cooling heat recovery tank 254 through the air distributor condenser 270 via the first distributor 257.

Dry ice injection system according to another embodiment of the present invention for achieving the above object, the carbon dioxide supply line 301 is connected to the pressure vessel 10 to provide a path for moving the carbon dioxide; A thermoelectric module 322, a cold sink 324 installed on one side of the thermoelectric module and connected to the carbon dioxide supply line 301 to liquefy the supplied carbon dioxide, and installed on the other side of the thermoelectric module, and a vaporization nozzle. And a hot sink 326 connected to the cold sink 324 by a carbon dioxide supply line 301 and allowing the liquefied carbon dioxide that has passed through the cold sink to be introduced and vaporized through the vaporization nozzle. Thermoelectric module unit 320; An injection unit 340 having a spray line 344 connected to the hot sink 326 of the thermoelectric module unit 320 and a snow nozzle 346 connected to an end of the spray line to spray snow; An air jacket 350 that wraps close to the injection unit 340 and flows air therein; An air blower 370 for supplying air to the air jacket; And, the controller 360 for controlling the output of the thermoelectric module by controlling the polarity of the power supply unit 362 for supplying power to the thermoelectric module 322 of the thermoelectric module unit 320.

On the carbon dioxide supply line in front of the cold sink 324 of the thermoelectric module unit 320, a pressure sensor 302 for measuring the pressure of the carbon dioxide supplied is installed, and the carbon dioxide between the cold sink 324 and the hot sink 326. A temperature sensor 306 is installed on the supply line, and the controller 360 receives pressure and temperature information from the pressure sensor and the temperature sensor to control the output of the thermoelectric module.

According to the present invention, the thermoelectric module is used instead of the conventional refrigeration cycle for cooling the carbon dioxide, so that the compact design can be reduced by reducing the volume of the entire equipment, and the eco-friendly products can be realized by not using the refrigerant gas. It works. In addition, by providing a water jacket or an air jacket in the carburetor, the injection line and the snow nozzle, there is an effect to solve the blockage caused by the freezing of the injection line and the nozzle in the continuous spraying process to provide a stable supply of dry ice. The vaporization heat generated in the vaporization process by the heat circulation unit is used for heat dissipation of the thermoelectric module, and the heat radiation heat is again used for freezing the injection line and the nozzle, which is very effective in terms of energy saving and eco-friendliness. In addition, by installing a pressure sensor on the carbon dioxide supply line and additionally installed a temperature sensor in front of the vaporizer inlet, it is possible to precisely control the injection state of the dry ice in response to the change in the supply pressure of the carbon dioxide.

1 is a state graph of carbon dioxide according to pressure and temperature changes,
Figure 2 is a schematic diagram of a dry ice spray device using a conventional pressure vessel,
3 is a structural diagram of a dry ice injection system according to an embodiment of the present invention;
4 is a structural diagram of a dry ice spray system according to another embodiment of the present invention;
5 is a structural diagram of a dry ice injection system according to another embodiment of the present invention.

The above objects, features and other advantages of the present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, a dry ice spray system according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. On the other hand, the dry ice injection system according to the present invention relates to a system for forming a dry ice using a carbon dioxide gas stored at a predetermined pressure or more in a commercially available pressure vessel and adjusting the injection state.

1 is a structural diagram of a dry ice injection system 100 according to an embodiment of the present invention. Dry ice injection system 100 according to an embodiment of the present invention is the cooling tank 110, the thermoelectric module unit 120, the first pump 130, the injection unit 140, the thermal circulation unit 150 and the controller 160.

The cooling tank 110 has an antifreeze contained therein and has a tank-shaped insulating structure. The carbon dioxide supply line 101 is connected to the pressure vessel 10 to supply carbon dioxide through the carbon dioxide supply line 101, and the carbon dioxide supply line 101 passes through the cooling tank 110 to cool the carbon dioxide. Conventional carbon dioxide cooling system uses a refrigerator to heat exchange with the refrigerant gas. Since the pressure of the supplied carbon dioxide is high pressure, the carbon dioxide gas passes through the inside and the refrigerant gas circulates through the outside using a double coaxial metal tube. It was manufactured in such a way that it was difficult to secure a stable heat transfer area. However, the cooling method of the present invention uses the water tank-type cooling tank 110 of the adiabatic structure, and the inside thereof circulates the antifreeze, so that the cooling and liquefaction of carbon dioxide can be performed more easily and stably.

The thermoelectric module unit 120 serves to cool the antifreeze, and includes a thermoelectric module 122, a cold sink 124 installed on one side of the thermoelectric module, and a hot sink 126 installed on the other side of the thermoelectric module. do. In the thermoelectric module 122, a plurality of thermoelectric elements are arranged to absorb or radiate heat through both sides by switching polarity of the power supplied from the power supply unit 162 under the control of the controller 140. The thermoelectric module 122 is an electronic component capable of directly converting thermal energy into electrical energy or electrical energy into thermal energy. The thermoelectric module 122 is capable of converting a function of a cooling or heating furnace by reversing the thermoelectric direction by controlling the polarity of the supplied power. Heat can be transferred from the heat absorbing surface to the heat radiating surface. In addition, precise temperature control of 0.05 ℃ is possible by controlling the supplied voltage or current, and there is no vibration part because there is no driving part to operate the device, and it is used as the thermoelectric characteristics of the thermoelectric semiconductor. It is characterized by no pollution or pollution. Detailed structure and features of the thermoelectric module are well known in the art to which the present invention pertains, and thus detailed descriptions thereof will be omitted. The cold sink 124 is installed on the endothermic side of the thermoelectric module 122 and cooled, and thus, the antifreeze flowing in the cold sink 124 is cooled. On the other hand, the hot sink 126 is installed on the heat dissipation side of the thermoelectric module 122 is heated, the cooling fluid is introduced from the cooling heat recovery tank 154 to be described later to heat dissipate the hot sink 126.

An antifreeze circulation line 132 is connected between the cooling tank 110 and the cold sink 124 of the thermoelectric module unit 120, and a first pump 130 is installed on the antifreeze circulation line 132. The first pump 130 circulates the antifreeze to inject the antifreeze in the cooling tank 110 into the cold sink 124 and then introduce the cooled antifreeze into the cooling tank 110 again.

The injection unit 140 is connected to the carbon dioxide supply line 101 via the cooling tank 110 to vaporize liquefied carbon dioxide and spray snow (dry ice), and specifically, a vaporizer having a vaporization nozzle 143 ( 142, a spray line 144 connected to the vaporizer 142, and a snow nozzle 146 connected to an end of the spray line to spray snow.

The thermal circulation unit 150 recovers the heat of vaporization generated from the injection unit 140 to dissipate the hot sink 126 of the thermoelectric module unit 120, and then uses the heat dissipation heat of the hot sink 126 to spray the unit 140. To prevent freezing. Specifically, the heat circulation unit 150 is installed to surround the injection unit 140 in close contact with the water jacket 152 in which the fluid (liquid) flows and the cooling to recover and store the fluid in the water jacket 152 The cooling fluid in the heat recovery tank 154 and the cooling heat recovery tank 154 flows into the hot sink 126 of the thermoelectric module unit 120 to dissipate the hot sink 126, and then re-waters the heated fluid through the hot sink. It includes a second pump 156 to circulate the fluid to flow into the jacket 152 to prevent the freezing of the injection unit 140. The water jacket 152 includes a water jacket 152a surrounding the opportunity 143 of the injection unit 140 and a water jacket 152b surrounding the spray line 144 and the snow nozzle 146, and the fluid It is a confidential structure so as not to leak.

Fluid circulation line 159 through which fluid moves between the injection unit 140, the cooling heat recovery tank 154, the cooling heat recovery tank 154, the hot sink 126 of the thermoelectric module unit, the hot sink 126, and the injection unit 140. ) Are respectively connected. The first distributor 157 is installed on the fluid circulation line 159 between the hot sink 126 and the injection unit 140, and the fluid passing through the hot sink 126 is connected to the vaporizer 142 by the first distributor 157. The water jacket 152a and the spraying line 144 and the snow jacket 146 surrounding the snow nozzle 146 are separated and introduced respectively. Then, a second distributor 158 is installed on the fluid circulation line 159 between the injection unit 140 and the cooling heat recovery tank 154, and the fluid and the injection in the water jacket 152a surrounding the vaporizer 142. The fluid inside the water jacket 152b surrounding the line 144 and the snow nozzle 146 is combined by the second distributor 158 and flows into the cooling heat recovery tank 154.

Meanwhile, according to one embodiment of the present invention, an air-cooled condenser 170 is additionally installed and installed at the side of the cooling heat recovery tank 154 so that the initial temperature of the system or the temperature of the fluid (radiant water) is higher than or equal to a predetermined temperature. In this case, the fan 172 operates to dissipate the hot sink 126 of the thermoelectric module unit 120. Since the evaporation is less progressed during the initial operation of the system, the cooling heat generated in the injection unit 140 is not sufficient. At this time, the fan 172 is operated to transfer the fluid via the hot sink 126 of the thermoelectric module unit 120. Cooled. In this case, a part of the fluid passing through the hot sink 126 is cooled by being partially introduced into the air-cooled condenser 170 through the first distributor 157, and the fluid passing through the air-cooled condenser 170 is returned to the cooling heat recovery tank 154. It will flow in. On the other hand, when the evaporation progresses to some extent and the snow is sprayed from the injection unit, the heat sink 126 is radiated using the heat of vaporization (cooling heat), so that the driving of the fan 172 is stopped.

The controller 160 controls the output of the thermoelectric module 122 by controlling the polarity of the power supply unit 162 that supplies power to the thermoelectric module 122 of the thermoelectric module unit 120, thereby adjusting the liquefaction temperature of carbon dioxide. Done. On the other hand, on the carbon dioxide supply line 101 in front of the cooling tank 110, a pressure sensor 102 for measuring the pressure of the carbon dioxide supplied is installed, the temperature sensor 105 for measuring the temperature of the antifreeze inside the cooling tank 110 ) Is installed, and the controller 160 receives pressure information and temperature information from the pressure sensor 102 and the temperature sensor 105 to control the output of the thermoelectric module. The controller 160 controls the first pump 130, the second pump 156, the fan 172, and the like appropriately according to the operation flow of the system.

Meanwhile, although not shown, a temperature sensor may be mounted inside the vaporizer 142 to control the temperature of snow that is actually injected. In addition, it may be used for the purpose of adjusting the size of particles or compensating the ejection pressure by connecting the N 2 (or CDA) line to be mixed with the vaporizer. Control of the injection amount of the liquefied carbon dioxide may vary depending on the arrangement or design of the orifice configured inside the vaporizer.

Hereinafter will be described the operation of the dry ice injection system 100 according to an embodiment of the present invention.

When the valve 107 is opened, the carbon dioxide stored in the pressure vessel 10 flows through the carbon dioxide supply line 101 and undergoes a liquefaction process while circulating the cooling tank 110. At this time, the controller 160 monitors the liquefaction temperature according to the change in pressure by using the pressure information received from the pressure sensor 102 to adjust the cooling output of the thermoelectric module 122. The first pump 130 introduces the antifreeze stored in the cooling tank 110 into the cold sink 124 of the thermoelectric module unit 120, and again cools the antifreeze cooled through the cold sink 124 to the cooling tank 110. Circulate antifreeze to flow inside. On the other hand, when the system is initially driven, the fan 172 of the air-cooled condenser 172 is driven to dissipate the hot sink 126 of the thermoelectric module unit 120, and in the state where snow is generated by vaporization, the fan 172 The driving stops and the vaporization heat is recovered to radiate the hot sink 126 using the recovered vaporization heat.

The carbon dioxide cooled in the liquefied state is introduced into the vaporizer 142 via the vaporization nozzle 143 of the injection unit 140 via the intermittent valve 108. The liquefied carbon dioxide is vaporized in the vaporizer 142 and passes through the injection line 144. The liquefied carbon dioxide is mixed with gaseous carbon dioxide and dry ice (snow), which is a solid carbon dioxide. It is injected through the snow nozzle 146. Meanwhile, the cooling fluid stored in the cooling heat recovery tank 154 by the second pump 156 radiates heat and absorbs heat while passing through the hot sink 126 of the thermoelectric module unit 120. The water flows into the water jacket 152a surrounding the vaporizer 142 and the water jacket 152b surrounding the spray line 144 via the first distributor 157. Accordingly, the vaporization nozzle 143 and the injection line 144 may be prevented from freezing during the continuous snow spraying process. On the other hand, the fluid inside the water jacket 152, which absorbs the heat of vaporization (cooling heat) from the injection unit 140 flows into the cooling heat recovery tank 154 again through the second distributor 158, the cooling heat recovery tank ( The fluid of 154 is circulated again for heat dissipation of the hot sink 126 of the thermoelectric module unit 120.

As described above, according to the dry ice injection system 100 according to the exemplary embodiment of the present invention, the thermoelectric module unit 120 is used instead of the existing refrigeration cycle for refrigerating carbon dioxide. It is possible to design a compact design by reducing it and also to realize eco-friendly products by not using refrigerant gas. In addition, in the cooling method, the water tank type cooling tank 110 having the adiabatic structure is used and the inside thereof circulates the antifreeze, so that the carbon dioxide can be cooled and liquefied more easily and stably. In addition, it is installed in the injection unit 140 having a vaporizer, a spray line, and a snow nozzle to surround the water jacket 152, in which fluid absorbing heat of vaporization flows, to freeze the spray hose and the nozzle during the continuous spraying process. By solving the blockage caused by the continuous injection of the snow there is an advantage to provide a stable supply of snow. The vaporization heat generated in the vaporization process of the injection unit 140 by the thermal circulation unit 150 is used for heat dissipation of the thermoelectric module unit 120, and the heat absorbed in the heat dissipation process is used to prevent freezing of the injection unit. As it is used for energy saving, it is very effective in terms of energy saving and eco-friendliness, and there is no need to install additional heat dissipation device and heating device, so it is possible to pursue cost reduction and miniaturization of equipment. In addition, by installing a pressure sensor on the carbon dioxide supply line there is an advantage that it is possible to precisely control the injection state of the dry ice by adjusting the liquefaction temperature of carbon dioxide in response to the change in the supply pressure of carbon dioxide.

4 is a structural diagram of a dry ice spray system 200 according to another embodiment of the present invention. Dry ice injection system 200 according to another embodiment of the present invention is a cooling tank 210, the first thermoelectric module unit 220, the first pump 230, the injection unit 240, the thermal circulation unit 250 , A second thermoelectric module unit 280 and a controller 260.

The cooling tank 210, the first thermoelectric module unit 220, the first pump 230, the injection unit 240, the thermal circulation unit 250 of the present embodiment is a dry ice spray according to an embodiment of the present invention The cooling tank 110, the thermoelectric module unit 120, the first pump 130, the injection unit 140 and the configuration and function of the system 100 are the same, so the detailed description thereof will be omitted, and other For the components, the components having the same configuration and operation as in the previous embodiment will be omitted.

The second thermoelectric module unit 280 is installed in front of the injection unit 240 on the carbon dioxide supply line 201, the second thermoelectric module 282, and is installed on one side of the second thermoelectric module and the carbon dioxide supply line 201 is connected to a second cold sink 284 through which carbon dioxide passes through and a second hot sink 286 installed on the other side of the second thermoelectric module 282. On the other hand, on the carbon dioxide supply line 201 between the second thermoelectric module unit 280 and the injection unit 240, a second temperature sensor 206 for detecting the temperature of the carbon dioxide flowing into the injection unit 240 is installed.

The controller 160 receives the pressure and temperature information from the pressure sensor 102, the first temperature sensor 205, and the second temperature sensor 206, and thus the first thermoelectric module 222 and the second thermoelectric module 282. Control the output.

According to the present embodiment, the evaporation conditions of carbon dioxide are more precisely adjusted. Specifically, the carbon dioxide cooled in the liquefied state is passed through the intermittent valve 208 and the second cold sink of the second thermoelectric module unit 280. 284, the controller 160 senses the temperature of the liquefied carbon dioxide introduced into the vaporizer 242 of the injection unit 240 through the second temperature sensor 206 and based on the appropriate liquefaction temperature according to the pressure. By controlling the output of the second thermoelectric module 282 there is an advantage that can be adjusted more precisely the vaporization conditions of carbon dioxide. That is, the first thermoelectric module unit 220 serving as the primary cooling device is cooled to a temperature at which the carbon dioxide can be sufficiently liquefied, and the temperature of the liquefied carbon dioxide introduced into the vaporizer 242 of the injection unit 240 is adjusted. By detecting and controlling the second thermoelectric module unit 280 based on the appropriate liquefaction temperature according to the pressure, the liquefaction temperature is controlled in two to precisely control the vaporization condition. In order to finely control the state of snow sprayed, it is necessary to precisely control the liquid temperature relative to the critical temperature, and the second thermoelectric module part plays such a role.

Here, it should be noted that the first cold sink 224 of the first thermoelectric module unit 220 is only a cooling function, the second cold sink 284 of the second thermoelectric module unit 280 is not only cooling but also heating It will also function.

Hereinafter, the operation of the dry ice injection system 200 according to another embodiment of the present invention will be described.

When the valve 207 is opened, the carbon dioxide stored in the pressure vessel 10 flows through the carbon dioxide supply line 201 and undergoes a liquefaction process while circulating the cooling tank 210. At this time, the controller 260 adjusts the cooling output of the first thermoelectric module 222 and the second thermoelectric module 282 by monitoring the liquefaction temperature according to the pressure change using the pressure information received from the pressure sensor 202. Done. The first pump 230 introduces the antifreeze stored in the cooling tank 210 into the cold sink 224 of the first thermoelectric module unit 220, and again cools the antifreeze cooled through the cold sink 224. (210) Circulate the antifreeze to flow into. On the other hand, during the initial driving of the system, the fan 272 of the air-cooled condenser 270 is driven to dissipate the first hot sink 226 of the first thermoelectric module unit 220, and the fan is in a state where snow is generated by vaporization. The driving of 272 is stopped and the heat of vaporization is recovered to radiate the first hot sink 226 using the recovered heat of vaporization.

The carbon dioxide cooled in the liquefied state is introduced into the vaporizer 242 through the vaporization nozzle 243 of the injection unit 240 via the intermittent valve 208 and injected through the snow nozzle 246. Meanwhile, the cooling fluid stored in the cooling heat recovery tank 254 by the second pump 156 dissipates and absorbs heat while passing through the first hot sink 226 of the first thermoelectric module unit 220. The heated fluid is introduced into the water jacket 252a surrounding the vaporizer 242 and the water jacket 252b surrounding the spray line 244 and the snow nozzle 246 via the first distributor 257. Meanwhile, a part of the fluid from the first hot sink 226 flows into the second hot sink 286 through the first distributor 257 and then exits, and then passes through the second distributor 158 to cool the heat recovery tank 154. Will flow into. The fluid in the water jacket 152 that absorbs the vaporization heat (cooling heat) from the injection unit 140 flows back into the cooling heat recovery tank 154 through the second distributor 258.

3 is a structural diagram of a dry ice injection system 300 according to another embodiment of the present invention. The dry ice injection system 300 according to the present embodiment includes a thermoelectric module unit 320, an injection unit 340, an air jacket 350, an air blower 370, and a controller 360. Dry ice injection system 300 according to another embodiment of the present invention is a compact structure system that does not have a separate circulation pump or cooling tank unlike the previous embodiments by miniaturizing when the amount of snow generated is relatively small Characterized in having a structure that can be used. However, the point of cooling the carbon dioxide by applying the thermoelectric module portion, the heat radiation of the thermoelectric module portion by using the vaporization heat is similar to the previous embodiments.

The thermoelectric module unit 320 is installed on the thermoelectric module 322, the cold sink 324 installed on one side (lower side) of the thermoelectric module 322, and the other side (upper side) of the thermoelectric module 322. And a hot sink 326. On the other hand, the cold sink 324 is connected to the carbon dioxide supply line 301 connected to the pressure vessel 10 serves to liquefy the supplied carbon dioxide. In addition, the hot sink 326 is connected by the cold sink 324 and the carbon dioxide supply line 301 so that the liquefied carbon dioxide passed through the cold sink 324 is introduced into the hot sink 326. On the other hand, the hot sink 326 is provided with a vaporization nozzle 327 at the inlet end, the liquefied carbon dioxide is introduced through the vaporization nozzle 327 is vaporized in the hot sink 326. That is, the hot sink 326 serves as a vaporizer at the same time.

According to the present embodiment, the thermoelectric module unit 320 directly cools the carbon dioxide using the cold sink 324 and vaporizes the liquefied carbon dioxide using the hot sink 326. Therefore, no separate heat dissipation device is required. Thus, according to the present embodiment, since the heat of vaporization generated during the vaporization of carbon dioxide is recovered from the heat dissipation in the hot sink 326 of the thermoelectric module unit, the heat dissipation effect of the thermoelectric module unit can be effectively maintained without an additional heat dissipation device. Snow vaporized and sprayed through the hot sink 326 of the module unit 320 may prevent freezing due to rapid freezing.

Meanwhile, although not shown, a temperature sensor may be mounted inside the hot sink 326 serving as a vaporizer as needed to control the temperature of snow that is actually sprayed. In addition, it may be used for the purpose of adjusting the size of particles or compensating the ejection pressure by connecting the N 2 (or CDA) line to be mixed with the vaporizer.

The injection unit 340 includes a spray line 344 connected to the hot sink 326 of the thermoelectric module unit and a snow nozzle 346 connected to an end of the spray line to spray snow. Since the hot sink 326 of the thermoelectric module unit 320 serves as a vaporizer, the injection unit 140 is omitted.

The air jacket 350 surrounds the injection unit 340 in close contact with air therein. Injection conditions may change due to freezing of the spray line 344 and the snow nozzle 346 during the continuous spraying of the snow, and freezing and freezing of the injection unit 340 by the air jacket 350 through which air flows The phenomenon can be prevented. The air blower 370 is a kind of air pump and supplies air to the air jacket 350. Air is introduced into the air jacket 350 through the air supply line by the air blower 370, and then exits through the outlet hole formed at the end surrounding the snow nozzle 146.

The controller 360 controls the polarity of the power supply unit 362 that supplies power to the thermoelectric module 322 of the thermoelectric module unit 320 to control the output of the thermoelectric module 322. On the other hand, on the carbon dioxide supply line 301 in front of the cold sink 324 of the thermoelectric module 320, a pressure sensor 302 for measuring the pressure of the carbon dioxide supplied is installed, and also the cold sink 324 and the hot sink 326 The temperature sensor 306 is installed on the carbon dioxide supply line 301, that is, the hot sink (vaporizer) inlet end. The controller 360 receives the pressure and temperature information from the pressure sensor 302 and the temperature sensor 306 to control the output of the thermoelectric module 322 while monitoring the liquefaction temperature according to the change in pressure.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. That is, those skilled in the art to which the present invention pertains can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications are possible. Equivalents should be considered to be within the scope of the present invention.

100,200,300. Dry Ice Injection System
101,201,301. CO2 supply line
102,202,302. Pressure sensor
110,210. Cooling tank 120,220,280,320. Thermoelectric Module
140,240,340. Injection unit 150,250. Cooling heat recovery unit
160,260,360. Controller

Claims (12)

In the dry ice injection system 100 for spraying dry ice using carbon dioxide gas stored in the pressure vessel 10 above a predetermined pressure,
A cooling tank 110 for liquefying carbon dioxide in the carbon dioxide supply line via an interior of the carbon dioxide supply line 101 connected to the pressure vessel 10 containing an antifreeze solution;
It is connected by the cooling tank 110 and the antifreeze circulation line 132 to cool the antifreeze supplied from the antifreeze circulation line, and installed on the thermoelectric module 122 and one side of the thermoelectric module, the antifreeze passes through A thermoelectric module unit 120 having a cold sink 124 and a hot sink 126 installed on the other side of the thermoelectric module;
A first pump 130 which circulates the antifreeze in the cooling tank into the cold sink of the thermoelectric module unit and then circulates it into the cooling tank again;
Connected to the carbon dioxide supply line via the cooling tank to vaporize the liquefied carbon dioxide to spray snow, the vaporizer 142 having a vaporization nozzle 143, the injection line 144 connected to the vaporizer and the end of the injection line An injection unit 140 having a snow nozzle 146 connected thereto;
The heat circulation unit recovers vaporization heat generated from the injection unit 140 to dissipate the hot sink of the thermoelectric module unit 120 and prevents freezing of the injection unit 140 by using the heat dissipation heat of the hot sink. 150; And,
Dry ice injection system comprising a controller (160) for controlling the output of the thermoelectric module by controlling the polarity of the power supply unit 162 for supplying power to the thermoelectric module of the thermoelectric module (120).
The method of claim 1,
On the carbon dioxide supply line in front of the cooling tank 110, a pressure sensor 102 for measuring the pressure of the carbon dioxide supplied is installed, and the temperature sensor 105 for measuring the temperature of the carbon dioxide to be cooled inside the cooling tank 110. Is installed,
The controller 160 receives the pressure information and temperature information from the pressure sensor and the temperature sensor to control the output of the thermoelectric module 122, characterized in that the dry ice injection system.
The method of claim 1, wherein the thermal circulation unit 150,
A water jacket 152 installed to closely wrap the injection unit 140 and having a fluid flowing therein;
A cooling heat recovery tank 154 for recovering and storing the fluid in the water jacket 152; And,
The fluid in the cooling heat recovery tank 154 flows into the hot sink 126 of the thermoelectric module unit 120, the fluid passing through the hot sink flows into the water jacket 152, and then again, the cooling heat recovery tank. Dry ice injection system comprising a second pump (156) for circulating the fluid to recover.
The method of claim 3, wherein
The fluid heated through the hot sink 126 to the water jacket 152a surrounding the vaporizer 143 by the first distributor 157 and the water jacket 146 surrounding the spray line 144 and the snow nozzle 146. Each flows in separately,
The fluid inside the water jacket 152a surrounding the vaporizer and the fluid inside the water jacket 152b surrounding the spray line and the snow nozzle are combined by the second distributor 158 to flow into the cooling heat recovery tank 154. Dry ice injection system characterized in that.
The method of claim 4, wherein
An air-cooled condenser 170 is installed at the side of the cooling heat recovery tank 154 to operate the fan 172 when the system is initially driven or when the fluid in the cooling heat recovery tank is below a predetermined temperature. The hot sink 126 is provided. A portion of the fluid passed through the first distributor (157) through the air-cooled condenser (170) is passed through the cooling heat recovery tank 154, characterized in that the dry ice injection system.
In the dry ice injection system 200 for injecting dry ice using carbon dioxide gas stored in the pressure vessel 10 above a predetermined pressure,
A cooling tank 210 for liquefying carbon dioxide in the carbon dioxide supply line via an interior of the carbon dioxide supply line 201 connected to the pressure vessel with an antifreeze therein;
It is connected by the cooling tank 210 and the antifreeze circulation line 232 to cool the antifreeze supplied from the antifreeze circulation line, the first thermoelectric module 222 and is installed on one side of the first thermoelectric module and the antifreeze A first thermoelectric module unit 220 having a first cold sink 224 passing through the inside and a first hot sink 226 installed on the other side of the first thermoelectric module;
A first pump 230 which circulates the antifreeze in the cooling tank 210 into the cold sink 224 of the first thermoelectric module 220 and then flows back into the cooling tank 210;
It is connected to the carbon dioxide supply line via the cooling tank 210 to vaporize the liquefied carbon dioxide to inject snow, the vaporizer 242 having a vaporization nozzle 243, the injection line 244 and the injection line connected to the vaporizer An injection unit 240 having a snow nozzle 246 connected to an end of the line;
It is installed in front of the injection unit 240 on the carbon dioxide supply line, the second thermoelectric module 282, the second thermoelectric module is installed on one side of the second carbon dioxide supply line is connected to the second through the carbon dioxide A second thermoelectric module unit 280 having a second cold sink 284 and a second hot sink 286 installed on the other side of the second thermoelectric module;
After recovering the heat of vaporization generated by the injection unit 240 to dissipate the first hot sink 226 of the first thermoelectric module unit 220, and using the heat radiation of the first hot sink to the injection unit 240 Thermal circulation unit 250 to prevent the freezing of the;
The polarity of the power supply unit 262 which supplies power to the first and second thermoelectric modules 222 and 282 of the first and second thermoelectric module units 220 and 280 is controlled to control the polarity of the first and second thermoelectric modules 222 and 282. Dry ice injection system comprising a controller (260) for controlling the output.
The method according to claim 6,
On the carbon dioxide supply line in front of the cooling tank 210, a pressure sensor 202 for measuring the pressure of the carbon dioxide supplied is installed, and the first temperature sensor 205 for measuring the temperature of the carbon dioxide to be cooled inside the cooling tank is provided. A second temperature sensor 206 is installed on the carbon dioxide supply line between the second thermoelectric module unit 280 and the injection unit 240.
The controller 260 receives pressure and temperature information from the pressure sensor 102 and the first and second temperature sensors 205 and 206 to control the output of the first and second thermoelectric modules 222 and 282. Dry ice spray system.
The method of claim 6, wherein the thermal circulation unit 250,
A water jacket 252 installed to cover the injection unit 240 in close contact with a fluid therein;
A cooling heat recovery tank 254 for recovering and storing the fluid in the water jacket 252; And,
The fluid in the cooling heat recovery tank 254 flows into the first hot sink 226 of the first thermoelectric module unit 220, and the fluid passing through the first hot sink is passed through the water jacket 252 and the second thermoelectric module. And a second pump (256) which circulates the fluid so as to flow into the second hot sink (286) of the unit (280) and then return it to the cooling heat recovery tank.
The method of claim 8,
The fluid passing through the first hot sink 226 is a water jacket 252a surrounding the vaporizer 242 by the first distributor 257 and a water jacket 252b surrounding the spray line 244 and the snow nozzle 246. And separated into each of the second hot sinks 286,
The fluid inside the water jacket 252a surrounding the vaporizer, the fluid inside the water jacket 252b surrounding the spray line and the vaporizer, and the fluid passing through the second hot sink 286 are combined by the second distributor 258 to cool the fluid. Dry ice injection system, characterized in that flow into the heat recovery tank (254).
The method of claim 9,
On the side of the cooling heat recovery tank 254, an air-cooled condenser 270, which is driven by the fan 272 during the initial operation of the system or when the fluid in the cooling heat recovery tank is below a predetermined temperature, is installed. A portion of the fluid heated via 226 is passed through the air-cooled condenser (270) through a first distributor (257) to enter the cooling heat recovery tank (254).
In the dry ice injection system for injecting dry ice using a carbon dioxide gas stored in the pressure vessel 10 above a predetermined pressure,
A carbon dioxide supply line 301 connected to the pressure vessel 10 to provide a path through which carbon dioxide moves;
A thermoelectric module 322, a cold sink 324 installed on one side of the thermoelectric module and connected to the carbon dioxide supply line 301 to liquefy the supplied carbon dioxide, and installed on the other side of the thermoelectric module, and a vaporization nozzle. And a hot sink 326 connected to the cold sink 324 by a carbon dioxide supply line 301 and allowing the liquefied carbon dioxide that has passed through the cold sink to be introduced and vaporized through the vaporization nozzle. Thermoelectric module unit 320;
An injection unit 340 having a spray line 344 connected to the hot sink 326 of the thermoelectric module unit 320 and a snow nozzle 346 connected to an end of the spray line to spray snow;
An air jacket 350 that wraps close to the injection unit 340 and flows air therein;
An air blower 370 for supplying air to the air jacket; And,
Dry ice injection comprising a controller 360 for controlling the output of the thermoelectric module by controlling the polarity of the power supply unit 362 for supplying power to the thermoelectric module 322 of the thermoelectric module unit 320 system.
The method of claim 11,
On the carbon dioxide supply line in front of the cold sink 324 of the thermoelectric module unit 320, a pressure sensor 302 for measuring the pressure of the carbon dioxide supplied is installed, and the carbon dioxide between the cold sink 324 and the hot sink 326. The temperature sensor 306 is installed on the supply line,
The controller 360 receives the pressure and temperature information from the pressure sensor and the temperature sensor to control the output of the thermoelectric module, characterized in that the dry ice injection system.
KR20100097893A 2010-10-07 2010-10-07 A system for spraying dry ice KR101188948B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101840346B1 (en) * 2017-08-08 2018-05-04 주식회사 비엠텍월드와이드 Cryogenic therapeutic device having regeneration device for cold gas and the controlling method for the same
KR20220006696A (en) * 2020-07-09 2022-01-18 고현식 Apparatus of cleaning carbon dioxide using stabilizer
KR20220095566A (en) * 2020-12-30 2022-07-07 한영테크노켐(주) Movable hydrogen charging station structure with safety device

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Publication number Priority date Publication date Assignee Title
JP4578644B2 (en) 1999-10-13 2010-11-10 大陽日酸株式会社 Dry ice snow jet cleaning device and cleaning method
JP5184300B2 (en) 2008-10-29 2013-04-17 岩谷産業株式会社 Dry ice manufacturing apparatus and dry ice manufacturing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101840346B1 (en) * 2017-08-08 2018-05-04 주식회사 비엠텍월드와이드 Cryogenic therapeutic device having regeneration device for cold gas and the controlling method for the same
KR20220006696A (en) * 2020-07-09 2022-01-18 고현식 Apparatus of cleaning carbon dioxide using stabilizer
KR20220095566A (en) * 2020-12-30 2022-07-07 한영테크노켐(주) Movable hydrogen charging station structure with safety device

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