KR20120000276A - Dehumidification apparatus for vacuum freezing drier and dehumidification method using the same - Google Patents

Abstract

PURPOSE: A dehumidification apparatus for a vacuum freezing drier and a dehumidification method using the same are provided to reduce the time for dehumidification because two dehumidification units alternately implement dehumidification. CONSTITUTION: A dehumidification apparatus for a vacuum freezing drier comprises a vacuum chamber(100) in which a material is placed to be frozen and dried and a pair of dehumidification units(200) which are connected to the vacuum chamber, receive the vapor discharged from the vacuum chamber, and are equipped with cooling units. The vapor discharged from the vacuum chamber alternatively flows into the dehumidification units.

Description

Dehumidification apparatus for vacuum freezing drier and dehumidification method using the same

The present invention relates to a dehumidifying apparatus and a dehumidifying method using the same, and more particularly, to a dehumidifying apparatus used in a vacuum freeze dryer.

Vacuum freeze drying is widely used as a method of drying foods, liquid medicines, blood, cells, etc. in the food processing, pharmaceutical, and biological fields.

Vacuum freeze drying uses a sublimation phenomenon in which the pressure inside the chamber in which the frozen material is loaded is lowered below the triple point of water in which water, ice, and steam coexist, and when the heat is gradually applied, the ice is directly converted into water vapor. That is, under low pressure of 6 millibar (mbar) or 4.6 Torr or less, the water in the form of ice is sublimed directly into water vapor without changing into a liquid according to the supply of thermal energy, and there are a myriad of spaces in the material by the sublimed water vapor. Will remain. Therefore, the vacuum freeze-dried porous material can be completely and quickly rehydrated.

A large amount of water vapor is generated in the vacuum freeze drying process, and a dehumidifier is provided in the vacuum freeze dryer to remove such water vapor.

Conventional defrosting device for a vacuum freeze dryer used a freeze dehumidification method by installing a cooling coil to remove water vapor, there is a problem that the air flow is blocked and the dehumidification capacity is reduced when water vapor is frozen in the cooling coil.

Of course, it is possible to improve the dehumidification capacity by stopping the operation of the vacuum freeze dryer and removing the ice on the cooling coil, which causes another problem that the drying efficiency is lowered due to the stop of the freeze drying operation.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a dehumidifying apparatus for a vacuum freeze dryer and a dehumidifying method using the same that can be smoothly dehumidified continuously.

Another object of the present invention is to provide a dehumidifying apparatus for a vacuum freeze dryer capable of efficient freeze drying and a dehumidifying method using the same.

Still another object of the present invention is to provide a dehumidifying apparatus for vacuum freeze dryer which is easy to maintain and a dehumidifying method using the same.

In order to achieve the above object, the present invention provides a vacuum chamber for lyophilizing a material loaded therein, and a cooling means connected to the vacuum chamber so that water vapor discharged from the vacuum chamber can be introduced therein. And a pair of dehumidifiers, and the water vapor discharged from the vacuum chamber is alternately introduced into the pair of dehumidification units, and the dehumidification unit into which the steam is introduced is cooled and sublimates water vapor into ice. Provide a dehumidifier.

And a control unit for controlling water vapor to alternately flow into the pair of dehumidifying units.

The control unit may include a humidity sensor capable of measuring an amount of water vapor inside the dehumidifying unit, and a controller configured to change the flow path when the humidity inside the dehumidifying unit reaches a set value.

The control unit includes a photo sensor comprising a light emitting element mounted on the cooling means for emitting light and a light receiving element for receiving the light emitted by the light emitting element, and a controller for controlling the flow path to be changed when the amount of accumulation is more than a predetermined thickness. It is characterized by.

A compressor for compressing a refrigerant in a gas state, a condenser for cooling a refrigerant in a high pressure gas state compressed by the compressor, and condensing it into a liquid of low temperature and high pressure, and a refrigerant of low temperature and high pressure cooled by liquefying the liquid in the condenser The expansion valve is further included, wherein the cooling means is characterized in that the heat exchanger is formed with a flow path so that the low-temperature low-pressure refrigerant discharged from the expansion valve flows.

An antifreeze is applied to the surface of the heat exchanger.

The pair of dehumidifying unit is characterized in that it further comprises a heating means.

The heating means is characterized in that the electric heater.

The heating means is characterized in that it is composed of a fan and a duct so as to heat the refrigerant flowing in the condenser to supply the heated hot air.

The dehumidifying unit is characterized in that the vacuum pump is connected.

A first pipe provided between the vacuum chamber and the pair of dehumidifying units, a second pipe provided between the expansion valve and the pair of dehumidifying units, and a third unit provided between the compressor and the pair of dehumidifying units A pipe and a fourth pipe provided between the vacuum pump and the pair of dehumidifying parts are further included, and each of the pipes is characterized in that a three-way valve is installed.

In addition, the present invention is a first step of lyophilizing the material loaded in the vacuum chamber, and connected to the vacuum chamber so that water vapor discharged from the vacuum chamber can be introduced as long as the cooling means and heating means are provided therein, respectively. A second step of introducing water vapor into one dehumidifying part of the pair of dehumidifying parts, a third step of operating the cooling means provided in the one dehumidifying part, and when the sublimation phenomenon of water vapor in the one dehumidifying part is slowed down. A fourth step of interrupting the supply of water vapor to the one dehumidifying part and introducing water vapor into another dehumidifying part, operating the cooling means provided in the other dehumidifying part, and operating the heating means provided in the one dehumidifying part The fifth step of defrosting, and when the sublimation of water vapor in the other dehumidification unit is slowed down, the supply of water vapor to the other dehumidifying unit is cut off and the one dehumidifying unit A sixth step of introducing water vapor; and a seventh step of operating the cooling means provided in the one dehumidifying unit, and operating and defrosting the heating means provided in the other dehumidifying unit, and steam in the vacuum chamber. It provides a method of using the dehumidifying apparatus for the vacuum freeze dryer, characterized in that the fourth to seventh steps are repeated until the discharge is not discharged.

A compressor for compressing a refrigerant in a gas state, a condenser for cooling a refrigerant in a high pressure gas state compressed by the compressor, and condensing it into a liquid of low temperature and high pressure, and a refrigerant of low temperature and high pressure cooled by liquefying the liquid in the condenser An expansion valve is further included, wherein the cooling means is a heat exchanger in which a flow path is formed so that the low-temperature low-pressure refrigerant discharged from the expansion valve flows, and the heating means is an electric heater or a refrigerant flowing in the condenser. It is characterized in that the fan and the duct so as to supply a hot air heated by exchange.

The pair of dehumidifying units are respectively connected to a vacuum pump, and further comprising an eighth step of operating the vibration pump when the operation of the heating means is terminated, and the fourth chamber until no water vapor is discharged from the vacuum chamber. It is characterized by repeating the steps to eighth step.

Referring to the effects of the dehumidifying apparatus for a vacuum freeze dryer and the dehumidification method using the same according to the present invention described above are as follows.

First, since dehumidification is performed alternately in two dehumidifying units, dehumidification is continuously performed, thereby reducing the dehumidification time.

Second, since the dehumidification is continuously performed, there is an advantage that the loss caused by stopping the freeze-drying process can be prevented.

Third, since each component is connected through a pipe and a valve, there is an advantage that maintenance is possible individually.

Figure 1 is a schematic diagram showing an embodiment of a dehumidifying apparatus for a vacuum freeze dryer according to the present invention, Figures 1a and 1b shows the flow when each dehumidifying unit is used.
Figure 2 is a schematic diagram showing another embodiment of a dehumidifying apparatus for a vacuum freeze dryer according to the present invention.
3 is a flowchart illustrating a dehumidification method using a dehumidifying apparatus for a vacuum freeze dryer according to the present invention.

Hereinafter, an embodiment of a dehumidifying apparatus for a vacuum freeze dryer and a dehumidifying method using the same according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a schematic diagram showing an embodiment of a dehumidifying apparatus for a vacuum freeze dryer according to the present invention, Figure 1a and Figure 1b shows the flow when each dehumidifying unit is used, Figure 2 is a vacuum freeze dryer according to the present invention It is a schematic diagram which shows another embodiment of the dehumidification apparatus.

The present invention is connected to the vacuum chamber 100 to lyophilize the material 10 loaded therein, and to the vacuum chamber 100 so that water vapor discharged from the vacuum chamber 100 can be introduced therein, and cooling means therein. And a pair of dehumidifying parts 200 provided with the water, and the steam discharged from the vacuum chamber 100 is alternately introduced into the pair of dehumidifying parts 200 and the dehumidifying water vapor is introduced. The unit 200 provides a dehumidifying apparatus for a vacuum freeze dryer, which comprises subliming water vapor into ice while being cooled.

Disclosed is a method of treating an organic material including a human body or an animal body through a vacuum freeze drying method.

This method is a process of rapid freezing using liquid nitrogen having a break point of organic matter at approximately -190 ° C, a process of finely decomposing organic matter into ultrasonic or high pressure water or steam for effective drying, and vacuum freezing in the vacuum chamber 100. It consists of removing moisture through the drying process and finally removing foreign substances.

In the vacuum chamber 100, the solid ice existing in the loaded material 10 is sublimed into gaseous water vapor, and the water vapor is connected to the pair of dehumidifying units through the first pipe 310 to be described later. Inflow alternately to 200.

In the related art, one cooling coil for dehumidification was provided, but the dehumidification ability was lowered, and thus the drying efficiency was lowered due to the stop of the freeze-drying process.

As shown in FIG. 1A, in order to solve the above-mentioned problem, the present invention includes the dehumidifying unit 200 as a pair, and the pair of dehumidifying units 200 are alternately used to form the vacuum chamber ( Water vapor discharged from 100 is introduced only into any one dehumidifying unit 200 of the pair of dehumidifying units 200.

The one dehumidifying part 200 into which water vapor is introduced is preferably isolated from the outside. The one dehumidifying unit 200 is in communication with the vacuum chamber 100 while water vapor is introduced. If the one dehumidifying unit 200 is not isolated from the outside, the vacuum is formed inside the vacuum chamber 100. Because it can be broken.

Water vapor introduced into the dehumidifying unit 200 is removed while undergoing a phase change process by the cooling means 210 provided therein. Basically, since the one dehumidifying unit 200 is in communication with the vacuum chamber 100 and is in the same vacuum state, water vapor will be sublimated from a gas to a solid as opposed to the vacuum chamber 100, and the sublimed ice grains are cooled by the cooling means. Dehumidification is carried out through the process (210).

However, when the amount of ice grains is increased, the ice grains act as a resistance, and thus the dehumidification capacity may be reduced. In this case, as shown in FIG. 1B, the other dehumidifying unit ( It is preferable to perform the aforementioned dehumidification process by introducing water vapor into the 200 and operating the cooling means 210.

At this time, the flow path to the one dehumidifying unit 200 is preferably completely blocked so that water vapor does not flow into the one dehumidifying unit 200. To this end, the first pipe 310 is preferably provided with a three-way valve 300 to be described later.

The three-way valve 300 is composed of one inlet and two outlets are formed with two flow paths, there is an advantage that can be used to select the desired flow path from the two flow paths. If one flow path is selected, the other flow path is completely blocked.

While the water vapor flows into the other dehumidifying part 200 and the dehumidification is performed by the cooling means 210, the cooling means 210 provided in the one dehumidifying part 200 is preferably stopped. When the operation of the cooling means 210 is stopped because the temperature inside the one dehumidifying unit 200 rises again, and because of this, it is possible to dissolve and remove the accumulated ice grains.

The dehumidifier 200 is preferably provided with a discharge means 400 for discharging the water in the liquid state. This is because the internal temperature of the one dehumidifying unit 200 is increased, so that the ice grains in the solid state change into the liquid water and the water needs to be removed. As the discharge means 400, a pump generally used may be used.

As described above, the cooling means 210 provided in the other dehumidifying unit 200 also blocks the flow path to the other dehumidifying unit 200 when the amount of ice grains accumulates, and the one dehumidifying unit 200 operates. It is preferable to introduce steam. This is because the ice grains accumulated in the one dehumidifying unit 200 are removed while the dehumidifying unit 200 is in progress.

As described above, when dehumidification is performed alternately in two dehumidification units, the dehumidification process may be continuously performed, thereby shortening the dehumidification time.

The controller 500 may further include a control unit 500 for controlling water vapor to be alternately introduced into the pair of dehumidifying units 200.

The amount of ice grains accumulated in the cooling means 210 provided in the one dehumidifying unit 200 into which water vapor flows increases, and thus, when the dehumidification is not performed smoothly, the flow path to the one dehumidifying unit 200. It is necessary to cut off and introduce water vapor into the other dehumidifying unit 200.

In addition, in the opposite situation, the flow path to the other dehumidifying unit 200 should be blocked and water vapor flowed into the one dehumidifying unit 200.

To this end, the control unit 500 is provided in the present invention. The control unit 500 performs a function of controlling a flow path of water vapor moving from the vacuum chamber 100 to the dehumidifying unit 200, thereby enabling continuous dehumidification.

The controller 500 may change the flow path of the steam at a time interval set by the user.

The control unit 500 is composed of a humidity sensor that can measure the amount of water vapor in the dehumidifying unit 200, and a controller for controlling to change the flow path when the humidity in the dehumidifying unit 200 reaches a set value. It is characterized by.

In general, the dehumidification capacity of the cooling means 210 does not decrease in proportion to time. This is because the amount of ice grains accumulated in the cooling means 210 is not proportional to time. Therefore, changing the flow path at regular time intervals may not be effective. Of course, if the user changes the flow path according to the progress of the dehumidification unit 200, the dehumidification efficiency can be maintained, but it is not efficient in that it requires extra effort and effort.

Since the humidity sensor may be used a general sensor that can measure the relative humidity in the dehumidifying unit 200, a detailed description thereof will be omitted.

The controller changes the flow path according to the humidity value inside the dehumidifying unit 200 read by the humidity sensor. Water vapor flows into the dehumidifying part 200 and accordingly, a dehumidification process is performed by the operation of the cooling means 210. As the dehumidification process proceeds, the dehumidification capacity of the cooling means 210 decreases, and thus the humidity inside the dehumidification part 200 will gradually increase.

The controller changes a flow path through which water vapor moves when the humidity inside the dehumidifying unit 200 is greater than or equal to a humidity set by a user.

In this configuration, there is an advantage in that the cooling means 210 can flexibly respond to the change in dehumidification capacity.

The control unit 500 is mounted on the cooling means 210, a photo sensor consisting of a light emitting element for emitting light and a light receiving element for receiving the light emitted by the light emitting element, and if the accumulation amount is more than a predetermined thickness to change the flow path It is characterized by consisting of a controller for controlling to.

In general, the dehumidification capacity of the cooling means 210 does not decrease in proportion to time. This is because the amount of ice grains accumulated in the cooling means 210 is not proportional to time. Therefore, changing the flow path at regular time intervals may not be effective. Of course, if the user changes the flow path according to the progress of the dehumidification unit 200, the dehumidification efficiency can be maintained, but it is not efficient in that it requires extra effort and effort.

The photosensor may be used to measure the amount of ice grains accumulated on the cooling means 210.

The photosensor is composed of a light emitting element for emitting light and a light receiving element for receiving the light emitted from the light emitting element. The light emitting device is mounted on the cooling means 210. As ice grains are accumulated on the cooling means 210, the amount of light received by the light receiving device is reduced. This is because light emitted from the light emitting device must pass through accumulated ice grains in order to be received by the light receiving device.

The controller determines an appropriate amount of ice grains accumulated on the cooling means 210 by using the amount of light accommodated in the light receiving element, and when the amount of ice grains is greater than or equal to a thickness arbitrarily set by the user, water vapor moves. Change the flow path.

In this configuration, there is an advantage in that the cooling means 210 can flexibly respond to the change in dehumidification capacity.

Compressor 50 for compressing the refrigerant in the gas state, a condenser 60 for cooling the refrigerant of the high pressure gas state compressed by the compressor 50 to condense into a liquid of low temperature and high pressure, and is cooled in the condenser 60 An expansion valve 70 is further included to convert the liquefied low temperature high pressure refrigerant into a low temperature low pressure refrigerant, and the cooling means 210 flows through the low temperature low pressure refrigerant discharged from the expansion valve 70. It characterized in that the heat exchanger 211 is formed.

As the cooling means 210, it is preferable to use a heat exchanger 211 in which a flow path through which a low temperature low pressure refrigerant can flow is formed.

The compressor 50, the condenser 60, and the expansion valve 70 may be used to supply the refrigerant having a low temperature and low pressure to the cooling means 210, and thus, a detailed description thereof will be omitted.

An antifreeze is applied to the surface of the heat exchanger 211.

In the conventional case, as the amount of ice grains accumulated in the evaporator coil increases, the dehumidification efficiency rapidly decreases.

However, in the present invention, to solve this problem, an antifreeze is applied to the surface of the heat exchanger 211. Antifreeze is generally used to prevent the freezing of automotive cooling water, mainly calcium chloride, magnesium chloride, ethylene glycol, ethyl alcohol and the like.

When antifreeze is applied to the surface of the heat exchanger 211, the water vapor introduced into the dehumidifying unit 200 is mixed with the antifreeze and is not sublimed into solid ice grains, but undergoes a process of liquefying with liquid water. As the water vapor is liquefied into water as described above, the water vapor flows down without being accumulated on the surface of the heat exchanger 211, thereby preventing the dehumidification efficiency from being lowered.

The pair of dehumidifiers 200 is characterized in that it further comprises a heating means 220.

While the steam is introduced into the other dehumidifying unit 200 and the dehumidification is performed by the cooling unit 210, the cooling unit 210 provided in the one dehumidifying unit 200 operates to melt accumulated ice grains. Will stop.

However, the range in which the temperature rises due to the operation of the cooling means 210 may be very narrow, and a considerable time may be consumed when the temperature rises.

Therefore, the pair of dehumidifiers 200 is preferably provided with a separate heating means 220. When the heating means 220 is provided, the temperature inside the dehumidifying unit 200 may be rapidly increased for a short time, and thus ice grains accumulated on the cooling means 210 may be quickly removed. There is an advantage.

An electric heater 221 may be used as the heating means 220. Since the electric heater 221 is the same as that generally used for heating, a detailed description thereof will be omitted.

The heating means 220 is characterized in that the fan 222 and the duct 223 is configured to supply heat of the heated high temperature by heat exchange with the refrigerant flowing in the condenser 60.

The refrigerant passing through the condenser 60 is introduced into the high temperature state by heat exchange with the air passing through the outer surface of the condenser 60 and is discharged into the low temperature state. That is, the air passing through the outer surface of the condenser 60 rises in temperature from low temperature to high temperature as opposed to the refrigerant.

In the present invention, it is used to remove ice grains accumulated on the surface of the cooling means 210 without discarding such hot air. As shown in FIG. 2, the fan 222 serves to provide a driving force to allow air to smoothly pass through the condenser 60. The air passing through the condenser 60 is collected through an accumulation means (not shown), and the hot air thus collected is supplied to the dehumidifying unit 200 via the three-way valve 300 and the duct 223. .

The accumulation means (not shown) may have any shape as long as it can collect air passing through the condenser 60. In addition, the accumulating means (not shown) is preferably provided with a propulsion means (not shown). Although the fan 222 plays a role of adding propulsion force to the air passing through the condenser 60, the propulsion force is generally consumed while passing through the condenser 60. Therefore, the propulsion means (not shown) is provided so that the hot air passing through the condenser 60 can be smoothly supplied to the dehumidifying part 200.

The hot air supplied to the dehumidifying unit 200 through the duct 223 is supplied into the dehumidifying unit 200 to melt the ice grains accumulated on the cooling means 210. Reusing air has the advantage of saving energy and consequently increasing lyophilization efficiency.

The dehumidifying unit 200 is characterized in that the vacuum pump 230 is connected.

Hot air passing through the surface of the condenser 60 using the electric heater 221 as shown in FIG. 1B or as shown in FIG. 2 to dissolve the ice particles accumulated in the cooling means 210. In the case of using the vacuum state inside the dehumidifying unit 200 may be broken.

Therefore, it is preferable that the vacuum pump 230 is connected to the dehumidifying unit 200 to make the inside of the dehumidifying unit 200 in the same vacuum state as the vacuum chamber 100.

A first pipe 310 provided between the vacuum chamber 100 and the pair of dehumidifiers 200, and a second pipe provided between the expansion valve 70 and the pair of dehumidifiers 200 ( 320, a third pipe 330 provided between the compressor 50 and the pair of dehumidifiers 200, and a third pipe provided between the vacuum pump 230 and the pair of dehumidifiers 200. Four pipe 340 is further included, each of the pipes 310, 320, 330, 340 is characterized in that the three-way valve 300 is installed.

The vacuum chamber 100 and the pair of dehumidifiers 200 are connected to the first pipe 310, and the three-way valve 300 is installed in the first pipe 310. As described above, two flow paths are formed in the three-way valve 300, and the flow path is determined by the controller.

The three-way valve 300 is preferably installed in each of the pipes 310, 320, 330, 340 including the first pipe (310). As shown in FIG. 2, when dehumidification is performed through the one dehumidifying part 200, water vapor may flow through the first pipe 310 connected to the one dehumidifying part 200 inside the three-way valve 300. A flow path is formed to be supplied.

At this time, the low-temperature low-pressure refrigerant discharged from the expansion valve 70 is provided in the one dehumidifying part 200 in the three-way valve 300 installed in the second pipe 320. The flow path is formed to be delivered to, and the high temperature low pressure refrigerant passing through the cooling means 210 may be delivered to the compressor 50 in the three-way valve 300 installed in the third pipe 330. So that a flow path is formed.

However, a flow path connecting the vacuum pump 230 and the other dehumidifying part 200 is formed in the three-way valve 300 installed in the fourth pipe 340. While dehumidification is performed in the dehumidifying unit 200, the dehumidifying unit 200 performs a defrosting process for removing ice particles, and the vacuum state may be broken while the dehumidifying process is performed. Therefore, the other dehumidifying unit 200 and the vacuum pump 230 are connected to the inside of the three-way valve 300 installed in the fourth pipe 340 to make the other dehumidifying unit 200 into a vacuum state again. A flow path is formed.

If the flow path is adjusted through the controller described above, there is an advantage that the user's convenience can be achieved.

As shown in FIG. 2, the fan 222 and the duct 223 are installed to deliver the hot air passing through the condenser 60 to the dehumidifying unit 200. Preferably, the duct 223 is provided with the three-way valve 300 in which the flow path is controlled by the controller so as to selectively supply any one of the pair of dehumidifying units 200. .

The first pipe 310 is preferably provided with a connection means (not shown) such as a coupler generally used. When connecting the vacuum chamber 100, the dehumidifying unit 200, the three-way valve 300 and the first pipe 310 by using such a connection means (not shown) it is possible to separate separately There is an advantage that easy maintenance and replacement.

The connection means (not shown) is preferably provided in all of the pipes (320, 330, 340) as well as the first pipe (310).

3 is a flowchart illustrating a dehumidification method using a dehumidifying apparatus for a vacuum freeze dryer according to the present invention.

As shown in FIG. 3, the present invention also relates to a first step of lyophilizing a material loaded in a vacuum chamber, and connected to the vacuum chamber so that water vapor discharged from the vacuum chamber can be introduced therein. A second step of introducing water vapor into one dehumidifying part of a pair of dehumidifying parts each provided with a cooling means and a heating means therein; a third step of operating the cooling means provided in the one dehumidifying part; When the sublimation of water vapor in the inside is slowed down, the fourth step of blocking the supply of steam to the one dehumidifying unit and introducing water vapor to the other dehumidifying unit, and operating the cooling means provided in the other dehumidifying unit, A fifth step of defrosting by operating the heating means provided in the dehumidifying unit, and water vapor to the other dehumidifying unit when the sublimation phenomenon of water vapor in the other dehumidifying unit slows A sixth step of shutting off the air supply and introducing water vapor into the one dehumidifying unit; and operating the cooling means provided in the one dehumidifying unit and operating the heating means provided in the other dehumidifying unit to defrost the seventh step. And a step of repeating the fourth to seventh steps until no water vapor is discharged from the vacuum chamber.

The first step (S100) for lyophilizing the material (10) loaded in the vacuum chamber 100, and is connected to the vacuum chamber 100 so that water vapor discharged from the vacuum chamber 100 can be introduced into The second step (S200) of introducing water vapor into the one dehumidifying unit 200 of the pair of dehumidifying unit 200 provided with the cooling means 210 and the heating means 220, respectively, and the one dehumidifying unit 200 The third step (S300) for operating the cooling means 210 provided in the) and when the sublimation phenomenon of the steam does not occur inside the one dehumidifying unit 200 to block the supply of steam to the one dehumidifying unit 200 And operating the fourth step (S400) for introducing water vapor to the other dehumidifying unit 200, the cooling means 210 provided in the other dehumidifying unit 200, and is provided in the one dehumidifying unit 200 The fifth step (S500) for operating the heating means 220 and the sublimation phenomenon of the water vapor occurs in the other dehumidifying unit 200 When not in the sixth step (S600) for blocking the supply of water vapor to the other dehumidifying unit 200 and the flow of water into the one dehumidifying unit 200, and the cooling means 210 provided in the one dehumidifying unit 200 ) And a seventh step (S700) of operating the heating means 220 provided in the other dehumidifying part 200, and the water vapor is not discharged from the vacuum chamber 100. It provides a method of using a dehumidifying apparatus for a vacuum freeze dryer, characterized in that the fourth step (S400) to the seventh step (S700) is repeated.

When the sublimation phenomenon of the water vapor in the one dehumidifying unit 200 is slowed down the internal flow path of the three-way valve 300 installed in the first pipe 310 from the one dehumidifying unit 200 to the other dehumidifying unit 200. The sublimation phenomenon can be easily detected by using a humidity sensor or a photo sensor, and the flow path is changed through the controller.

The flow path can also be changed at regular time intervals determined by the user.

Compressor 50 for compressing the refrigerant in the gas state, a condenser 60 for cooling the refrigerant of the high pressure gas state compressed by the compressor 50 to condense into a liquid of low temperature and high pressure, and is cooled in the condenser 60 An expansion valve 70 is further included to convert the liquefied low temperature high pressure refrigerant into a low temperature low pressure refrigerant, and the cooling means 210 flows through the low temperature low pressure refrigerant discharged from the expansion valve 70. Is a heat exchanger 211 is formed, the heating means 220 is a heat exchanger with the refrigerant flowing in the electric heater 221 or the condenser 60 to supply the heated hot air to the fan 222 and the duct It is preferable that it is (223).

The pair of dehumidifiers 200 are connected to the vacuum pump 230, respectively, and the eighth step (S800) for operating the vibration pump 230 when the operation of the heating means 220 is further included; The fourth step S400 to the eighth step S800 are repeated until no water vapor is discharged from the vacuum chamber 100.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to a specific embodiment, Comprising: It should be interpreted by the attached Claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

100: vacuum chamber 200: dehumidifying unit
300: three-way valve 400: discharge means

Claims (14)

A vacuum chamber for lyophilizing the material loaded therein;
A pair of dehumidifiers connected to the vacuum chamber to allow water vapor discharged from the vacuum chamber to flow therein and having cooling means therein;
Including;
The water vapor discharged from the vacuum chamber is alternately introduced into the pair of dehumidifying unit, the dehumidifying unit for the vacuum freeze dryer, characterized in that to sublimate the water vapor to ice while cooling the dehumidifying unit. The method of claim 1,
And a control unit for controlling water vapor to be alternately introduced into the pair of dehumidifying units. The method of claim 2,
The control unit,
And a humidity sensor capable of measuring the amount of water vapor inside the dehumidifying unit, and a controller configured to change the flow path when the humidity inside the dehumidifying unit reaches a set value. The method of claim 2,
The control unit,
A photo sensor comprising a light emitting element mounted on the cooling means to emit light and a light receiving element receiving light emitted to the light emitting element, and a controller configured to control to change the flow path when the amount of accumulation is more than a predetermined thickness. Dehumidifier for vacuum freeze dryer. The method according to claim 3 or 4,
A compressor for compressing a refrigerant in a gas state, a condenser for cooling a refrigerant in a high pressure gas state compressed by the compressor, and condensing it into a liquid of low temperature and high pressure, and a refrigerant of low temperature and high pressure cooled by liquefying the liquid in the condenser Expansion valve is further included,
The cooling means is a dehumidifying apparatus for a vacuum freeze dryer, characterized in that the heat exchanger is formed with a flow path so that the low-temperature low-pressure refrigerant discharged from the expansion valve. The method of claim 5,
Dehumidifying apparatus for a vacuum freeze dryer, characterized in that the antifreeze is applied to the surface of the heat exchanger. The method of claim 1,
Dehumidifying apparatus for a vacuum freeze dryer, characterized in that the pair of dehumidification unit further comprises a heating means. The method of claim 7, wherein
Dehumidifier for vacuum freeze dryer, characterized in that the heating means is an electric heater. The method of claim 7, wherein
And said heating means comprises a fan and a duct so as to exchange heat with the refrigerant flowing in said condenser and to supply heated hot air. The method according to claim 8 or 9,
Dehumidifying apparatus for a vacuum freeze dryer, characterized in that the dehumidifying unit is connected to a vacuum pump. The method of claim 10,
A first pipe provided between the vacuum chamber and the pair of dehumidifying units, a second pipe provided between the expansion valve and the pair of dehumidifying units, and a third unit provided between the compressor and the pair of dehumidifying units Further comprising a pipe, and the fourth pipe provided between the vacuum pump and a pair of dehumidifying unit,
Dehumidifier for vacuum freeze dryer, characterized in that the three-way valve is installed in each of the pipe. A first step of lyophilizing the material loaded in the vacuum chamber;
A second step of introducing water vapor into one dehumidifying part of a pair of dehumidifying parts connected to the vacuum chamber so that the water vapor discharged from the vacuum chamber is introduced and provided with a cooling means and a heating means therein;
A third step of operating the cooling means provided in the one dehumidifying unit;
A fourth step of interrupting the supply of steam to the one dehumidifying unit and introducing water vapor to the other dehumidifying unit when the sublimation phenomenon of the steam in the one dehumidifying unit is slowed down;
A fifth step of operating the cooling means provided in the other dehumidifying part and defrosting by operating the heating means provided in the one dehumidifying part;
A sixth step of interrupting the supply of steam to the other dehumidifying unit and introducing water vapor into the one dehumidifying unit when the sublimation phenomenon of the steam in the other dehumidifying unit is slowed down;
A seventh step of operating the cooling means provided in the one dehumidifying part and defrosting by operating the heating means provided in the other dehumidifying part;
Including;
The method of using a dehumidifier for a vacuum freeze dryer, characterized in that the steps 4 to 7 are repeated until water vapor is not discharged from the vacuum chamber. The method of claim 12,
A compressor for compressing a refrigerant in a gas state, a condenser for cooling a refrigerant in a high pressure gas state compressed by the compressor, and condensing it into a liquid of low temperature and high pressure, and a refrigerant of low temperature and high pressure cooled by liquefying the liquid in the condenser Expansion valve is further included,
The cooling means is a heat exchanger in which a flow path is formed so that the low temperature low pressure refrigerant discharged from the expansion valve flows,
And the heating means is a fan and a duct so as to exchange heat with a refrigerant flowing in the electric heater or the condenser to supply heated high temperature air. The method of claim 13,
The pair of dehumidifiers are respectively connected to a vacuum pump,
When the operation of the heating means is terminated further includes an eighth step of operating the vibration pump,
The method of using a dehumidifying apparatus for a vacuum freeze dryer, characterized in that the steps 4 to 8 are repeated until no water vapor is discharged from the vacuum chamber.

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