KR100899649B1 - viewing apparatus of phase change using dry ice - Google Patents

Abstract

The present invention relates to an apparatus for observing a state change of a material using dry ice, the chamber having an inner accommodating space for accommodating dry ice, and having a see-through window for viewing the inside of the inner accommodating space, and a pressure inside the chamber. A pressure gauge installed to measure the temperature, a temperature gauge installed to measure the temperature inside the chamber, a regulator installed to regulate the pressure inside the chamber, and a controller to control the regulator to maintain the pressure inside the chamber within the set range. It includes; According to the apparatus for observing the state change of a material using dry ice, it is possible to visually observe the phase change of dry ice into liquid and gas according to temperature and pressure changes, and to control the duration of the triple point state of dry ice. Provide advantages.

Dry ice, phase change, triple point

Description

Viewing apparatus of phase change using dry ice}

The present invention relates to an apparatus for observing a state change of a material using dry ice, and to an apparatus for observing a state change of a material using dry ice, which makes it easy to visually observe a state change caused by temperature and pressure change of dry ice. will be.

In general, the state of matter changes with temperature and pressure. The physical state of matter is called phase and is divided into solid, liquid and gas. In addition, various experimental apparatuses for observing state changes due to temperature changes are proposed to observe the state changes of such materials, but there are few apparatuses capable of observing phase changes due to pressure. In particular, there is no device to visually check the phase equilibrium state where solid, liquid, and gas coexist. A device is required.

The present invention was devised to improve the above problems, and an object thereof is to provide an apparatus for observing a state change of a material using dry ice, which can easily observe a phase change using dry ice.

In order to achieve the above object, the apparatus for observing a state change of a material using dry ice according to the present invention includes a chamber having an inner accommodating space for accommodating dry ice and a perspective window for viewing the inside of the inner accommodating space; ; A pressure gauge installed to measure the pressure in the chamber; A temperature measuring device installed to measure a temperature inside the chamber; A regulator installed to adjust a pressure in the chamber; And a controller for controlling the regulator to maintain the pressure inside the chamber within a set range.

Preferably, the chamber has a cylindrical body made of aluminum material having an internal space penetrated in both directions; A cap coupled to the body so as to close both side openings of the body, the cap having a viewing window made of glass, the safety valve being opened on the first pipe extending in communication with the body when the pressure exceeds a set pressure; A manual switch that can open and close the first pipe by a user's operation; is sequentially installed from the body, and the regulator is installed on the first pipe between the safety valve and the manual switch.

The temperature measuring device may further include a camera installed to detect a temperature of the bottom of the inner space of the body, and installed to capture the inside of the main body through the viewing window. It is possible to collect the measured pressure value, the temperature value measured by the temperature measuring instrument and the image photographed by the camera.

More preferably, the safety valve is to be opened when the pressure is more than 10 atm.

The controller preferably controls the regulator to open the gas in the body when the pressure in the body is 7.5 atm, and then close the flow path when the pressure in the body is 4 atm.

According to an aspect of the present invention, a tank containing a liquid to visually check the gas discharged from the regulator; further comprising, the tank is coupled in communication with the outlet of the regulator and the second pipe.

Lime water may be applied to the liquid contained in the tank.

According to the apparatus for observing the change of state of a material using dry ice according to the present invention, it is possible to visually observe the phase change of dry ice into liquids and gases according to temperature and pressure changes, and the duration of the triple point state of dry ice. It provides the advantage of controlling.

Hereinafter, an apparatus for observing a state change of a material using dry ice according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a state change observation apparatus of a material using dry ice according to the present invention.

Referring to FIG. 1, the apparatus 100 for monitoring state change includes a chamber 110, a pressure gauge 120, a temperature gauge 130, a regulator 140, and a controller 150.

The chamber 110 has a structure having an internal accommodating space 112 capable of accommodating dry ice and a viewing window capable of viewing the interior of the internal accommodating space 112.

When the chamber 110 is divided, a cap coupled to the body 111 so as to close the openings on both sides of the hollow cylindrical body 111 and both sides of the body 111, each having a two-sided inner receiving space 112 ( 115).

The outer surface of the body 111 is formed with a screw thread to be screwed with the cap 115.

Cap 115 is formed to be detachable by the body 111 and the screw coupling, the front is provided with a viewing window 115a made of tempered glass for viewing.

The body 111 and the cap 115 are formed of a material that can withstand extremely low temperatures, preferably formed of aluminum.

The pressure gauge 120 is installed to measure the pressure inside the chamber 110.

The pressure gauge 120 measures the pressure through the communication tube 123 formed to communicate with the chamber 110, displays the measured pressure through the display unit 125, and outputs the pressure to the first processor 153.

The temperature measuring unit 130 is installed to measure the temperature inside the chamber 110.

Preferably, the temperature measuring device 130 is installed to detect the temperature of the bottom of the inner receiving space of the body 111 so that the temperature of the dry ice which is phase-changed in the chamber 110 can be measured more precisely. In this case, the temperature of the liquefied carbon dioxide in the chamber 110 may be measured, thereby further increasing the temperature measurement accuracy.

The temperature measured by the temperature measuring unit 130 is displayed through the display unit 135 and output to the first processor 153.

The safety valve 161, the regulator 140, and the manual switch 165 are sequentially installed on the first pipe 118 extending in communication with the body 111 of the chamber 110.

The safety valve 161 is installed to prevent damage and damage caused when the pressure inside the chamber 110 is excessively increased during the experiment. When the pressure inside the chamber 110 exceeds the set pressure, the safety valve 161 may be opened. The valve is structured to be.

The safety valve 161 may be applied to a variety of known structures, such as domestic registered utility model No. 0011844.

Preferably, the safety valve 161 is adapted to be opened when the pressure inside the chamber 110 is 10 atm or more.

The regulator 140 is installed between the safety valve 161 and the manual switch 165 on the first pipe 118.

The regulator 140 adjusts the pressure inside the chamber 110 so that the set pressure range is maintained inside the chamber 110.

The regulator 140 has a method of operating the valve seat for opening and closing the inner flow path by varying the elastic force of the tension spring by the operation of the handle, and an electronic method of opening and closing the flow path by the solenoid is operated in accordance with a control signal applied from the outside. It is applicable and preferably the electronic method is applied.

In this case, the regulator 140 is operated such that the pressure range set by the control of the first processor 153 is maintained in the chamber 110.

The manual switch 165 is installed on the first pipe 118 so as to open and close the first pipe 118 manually by a user's operation.

The manual switch 165 is applied to allow the gas remaining in the chamber 110 to be quickly discharged when the experiment is repeated.

The camera 170 is installed to capture the inside of the chapter 110 through the viewing window 115a of the cap 115. The camera 170 outputs the captured image information to the controller 150.

The controller 150 controls the regulator 140 to maintain the pressure inside the chamber 110 within a set range.

The controller 150 is configured to collect the pressure value measured by the pressure measuring instrument 120, the temperature value measured by the temperature measuring instrument 130, and the image photographed by the camera 170.

In the example shown, the controller 150 has a first processor 153 and a computer 155.

The first processor 153 converts the values output from the pressure gauge 120 and the temperature gauge 130 into data readable by the computer 155 and outputs the data to the computer 155. In addition, the first processor 153 controls the pressure holding range of the regulator 140 according to the control information output from the computer 155.

Preferably, the controller 150 has a flow path closed when the pressure in the chamber 110 is 4 atm after the regulator 140 is opened so that the gas in the chamber 110 is discharged when the pressure in the chamber 110 is 7.5 atm. The regulator 140 is controlled so as to be possible.

The computer 155 stores the data collected from the first processor 153 and displays the stored data through the display device according to the set display method.

On the other hand, the water tank 180 was applied to visually check the gas discharged from the regulator 140.

The water tank 180 is coupled in communication with the outlet of the regulator 140 and the second pipe 183.

The tank 180 is filled with liquid. Preferably, the liquid filled in the water tank 180 is lime water applied. In this case, when the carbon dioxide is discharged in the gas state through the outlet of the regulator 140, it can be observed that the lime water and carbon dioxide react with each other in the water tank 180 to be changed to calcium carbonate and water.

On the other hand, by differently, by combining a balloon (not shown) to the outlet of the regulator 140 may check the presence or absence of gas discharge.

Hereinafter, an experimental process for observing the triple point state of dry ice using the observation device 100 will be described.

First, the second pipe 183 connected to the water tank 180 is separated, and the highest pressure and the lowest pressure of the regulator 140 are set. Where the highest pressure is the open-circuit pressure and the lowest pressure is the shutoff condition pressure after opening. Preferably, the maximum pressure of the regulator 140 is set to 7.5 atm, the minimum pressure is set to 4.0 atm.

Next, the dry ice is mounted in the body 111 and the cap 115 is coupled.

Thereafter, the first switch 165 is closed to close the first pipe 118 and then the state change of the dry ice is observed through the viewing window 115a.

The dry ice in the chamber 110 sublimes from a solid to a gaseous state by an increase in temperature, and the internal pressure is increased by the sublimed gas. That is, since the temperature of the chamber 110 is maintained at room temperature, the temperature inside the chamber 110 is also increased, and when the pressure inside the chamber 110 is increased by the sublimed gas in this process, a liquid state is indicated. The pressure inside the chamber 110 corresponds to the triple point of dry ice at 5.1 atm, and the temperature is around -56.6 ° C., where solid, liquid, and gas are present.

On the other hand, if you want to visually confirm that the phase change from the dry ice in the solid state to the gas state, or connected to the output terminal of the regulator 140 to the above-described water tank 180, or combine the balloon when the regulator 140 is opened It can be visually confirmed through the expansion of the balloon or the reaction with the liquid in the water tank 180 by the ejected gas.

This observation device 100 can also be used to perform adiabatic expansion experiment.

That is, when the regulator 140 is opened, it may be confirmed through the temperature measuring device 130 that the temperature inside the chamber 110 also decreases as the pressure inside the chamber 110 falls due to adiabatic expansion.

1 is a view showing a state change observation apparatus of a material using dry ice according to the present invention.

Claims (7)

delete A chamber having an inner accommodating space for accommodating dry ice and having a viewing window for viewing the interior of the inner accommodating space; A pressure gauge installed to measure the pressure in the chamber; A temperature measuring device installed to measure a temperature inside the chamber; A regulator installed to adjust a pressure in the chamber; And a controller controlling the regulator to maintain the pressure inside the chamber within a set range. The chamber has a cylindrical body made of aluminum material having an internal space penetrated in both directions; And a cap coupled to the body to respectively close both side openings of the body, the cap having a viewing window made of glass. On the first pipe extending in communication with the body A safety valve that opens when the pressure exceeds the set pressure; A manual switch which can open and close the first pipe by a user's operation; is sequentially installed from the body, Device for monitoring the state of the material using dry ice, characterized in that the regulator is installed on the first pipe between the safety valve and the manual switch. The method of claim 2, wherein the temperature measuring device is installed to detect the temperature of the bottom of the inner space of the body, And a camera installed to capture the inside of the main body through the viewing window. The controller And a pressure value measured by the pressure measuring instrument, a temperature value measured by the temperature measuring instrument, and an image photographed by the camera. According to claim 3, wherein the safety valve is a device for monitoring the state change of the material using dry ice, characterized in that the opening to be more than 10 atm. 5. The controller of claim 4, wherein the controller controls the regulator to open the gas in the body when the pressure in the body is 7.5 atm and to close the flow path when the pressure in the body is 4 atm. Observation device of state change of material using dry ice. The method of claim 4, wherein Further comprising: a water tank containing a liquid to visually check the gas discharged from the regulator, Wherein the tank is coupled to the outlet of the regulator in communication with the second pipe is a device for monitoring the state change of the material using dry ice. The method of claim 6, Device for observing the state change of the material using dry ice, characterized in that the liquid contained in the tank is lime water.

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