KR101908123B1 - A device for freezing and drying food with good freezing and drying and good moisture removal - Google Patents

Abstract

The present invention relates to a food product freeze-drying apparatus which sucks air from a freeze-drying chamber by using a vacuum pump, enhances the freeze-drying performance and sublimated moisture removal efficiency, and protects the vacuum pump. According to an embodiment of the present invention, the food product freeze-drying apparatus includes a freeze-drying means (20), a primary moisture processing means (40), a secondary moisture removing and glycerin processing means (60), and the vacuum pump protecting means.

Description

Technical Field [0001] The present invention relates to a freeze-drying device for freezing and drying food,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a food freeze dryer, and more particularly, to a food freeze dryer improved in freeze-drying performance and improved sublimated water removal efficiency.

Generally, a freeze-drier is widely used for freezing and drying foods, vegetables and fruits or drugs.

However, in the drying process, since the sublimated water generated by sublimation of water in a freeze-dried object such as fruit is introduced into the vacuum pump, the vacuum pump weak in moisture is not able to exert its function and a trouble is caused.

Therefore, if the vacuum pump fails in the lyophilization process, the lyophilizer is forced to stop operating. Therefore, the lyophilization time is long and the efficiency is low.

Therefore, although the prior art as described in the patent literature of the prior art document is disclosed, since the external air is introduced into the vacuum pump when the excessive water vapor is introduced while the sublimated water is condensed by the simple condenser, It takes a long time to suck it, which causes a long freeze-drying time, deteriorates freeze-drying performance, and deteriorates the performance of the vacuum pump.

KR 10-1997-0011104 B1 1997.07.07

The present invention relates to a food freeze-drying machine for sucking air in a freeze-drying chamber by a vacuum pump, allowing the heat generated in the freeze-drying chamber to be conformed to the convection action and effectively removing the sublimed water generated during the freeze drying process using water and glycerin The present invention provides a food freeze dryer in which the vacuum pump is protected by improving the freeze-drying performance and the sublimated water removal efficiency to be greatly improved.

The present invention relates to a freeze-drying apparatus, comprising a semi-circular upper portion of a freeze-drying chamber in which a freeze-dried object accommodated in a loading chamber is opened and closed by an entrance lid, and a refrigerant tube circulated by the refrigerant unit is provided on an inner circumference of a semi- And a heat medium pipe connected to the heat medium unit and circulating the heat medium is disposed under the semi-circular freeze-drying chamber so that hot air is convected upward, and the hot air A freeze-drying unit configured to have a heat reflecting plate on a semicircular inner circumferential surface of the upper side of the freeze-drying chamber so that the thermal energy of the freeze-drying chamber is radiated in all directions, and an inlet pipe connected to the exhaust pipe through which the sublimated moisture air is discharged A water separation chamber, and a water separation chamber A first water treatment unit having water to be accommodated and a heating medium chamber provided outside the moisture separation chamber and to which a heating medium is supplied by the heating unit and an inlet pipe connected to the exhaust pipe communicating with the exhaust port in the upper part of the moisture separation chamber are inserted Temperature water-cooling chamber provided outside the water-separating chamber, and cooling water in a room-temperature state of the room-temperature cold-water room are circulated by a pump and a circulation tube, and the water- And a vacuum pump for sucking air in order to vacuum the freeze-drying chamber.

A vaporizing chamber in which water containing glycerin is inserted by inserting an inlet pipe connected to the transfer pipe connected to the water separation chamber of the secondary water removal glycerin treatment means and a feed pipe connected to the water vapor separation chamber by a pump, A heating chamber, a glycerine water treatment means configured to discharge vaporized air through an exhaust pipe communicated with an exhaust port above the vaporizing chamber, and a storage chamber for receiving and storing glycerin discharged from the vaporization chamber by a pump and a transfer pipe, Of the purified glycerin is transferred to the water separation chamber of the second water removal glycerin treatment means by the pump and the transfer pipe.

And a vertical outlet pipe through which the inlet pipe is inserted between each of the exhaust ports and the exhaust pipe in the upper portion of the water separation chamber and the upper portion of the vaporizing chamber, And a heat transfer tube, respectively.

A branch chamber communicated with an air inlet connected directly to an exhaust pipe of the secondary water-removing glycerin treatment means, and a refrigerant chamber having upper and lower blocking members at a lower portion of the branch room to constitute a refrigerant chamber, A plurality of water separation pipes having ventilation holes for allowing the branch room and the air U-turn chamber to communicate with each other are vertically arranged in the coolant chamber, and the air chamber is provided at the upper and lower portions thereof with air chambers each having an exhaust port and a drain port. A water separating means having a refrigerant inlet tube for supplying a refrigerant to the refrigerant chamber in the refrigerant supply chamber and a refrigerant inlet and a refrigerant outlet provided in the refrigerant supply chamber and the refrigerant chamber, And a third-order moisture removal processing unit including a refrigerant cooling unit to be connected do.

The lower end of the refrigerant charging tube is located close to the lower portion of the refrigerant chamber so as to have a refrigerant diffusion space below the refrigerant charging tube end and a plurality of water separating pipes are provided in the refrigerant chamber in the refrigerant charging pipe Other features.

The present invention can adapt to the convection of heat during the freeze drying of food and simultaneously transmit the radiant heat. Therefore, the freeze-drying efficiency is greatly improved and the freeze-drying time is not delayed.

In addition, since moisture can be almost removed from the sublimated moisture air having a very high water content inevitably generated in the food freeze dryer, the air having a very low moisture content is sucked into the vacuum pump, so that the vacuum pump is protected, There is an effect that a failure hardly occurs.

Therefore, since the present invention eliminates the trouble of repairing the vacuum pump which has been frequently caused by moisture, the freeze dryer can be continuously operated without stopping the operation of the food freezer, thereby improving the productivity of the frozen product There is an effect to be greatly improved.

Further, since the lifetime of the vacuum pump is increased, maintenance of the vacuum pump is simplified and the cost of purchasing the vacuum pump is reduced, thereby reducing the maintenance cost and improving the economical efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an entire system of a food freeze-drier according to the present invention; Fig.
Fig. 2 is an embodiment configuration of the loading / moving means according to the present invention,
3 is a cross-sectional view showing the whole of freeze-drying means according to the present invention,
FIG. 4 is a cross-sectional view taken along the line X-X 'in FIG. 3,
5 is a configuration diagram for explaining the first level processing means according to the present invention;
6 is a constitutional view showing the secondary water-removing glycerin treatment means, the glycerin moisture treatment means and the glycerin storage means of the present invention,
7 is a perspective view showing the entire third water removal processing means according to the present invention,
8 is an elevational view showing the entire third water removal processing means according to the present invention,
9 is a cross-sectional view of a third-order moisture removal processing unit according to the present invention,
10 is a cross-sectional view of the refrigerant chamber showing the essential part of the tertiary moisture removal processing means of the present invention,
11 is a cross-sectional view taken along the line Y-Y 'in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the accompanying drawings.

1, the present invention relates to a lyophilization apparatus for a lyophilization apparatus, comprising: a lyocyte moving means (10) capable of moving a lyophilized object such as fruit (not shown, hereinafter also referred to as a drying object) A first water treatment means 40 for removing water contained in the sublimated moisture air discharged from the freeze drying chamber 21, Means 60 and glycerin water treatment means 70, a glycerine storage tank 90, a tertiary moisture removal treatment means 100 and a vacuum pump 200.

2, the load transfer means 10 is engaged with the rack 12 provided on the floor support 11, and the pinion 15 rotated by the driving force of the reduction motor 14 is rotated, 13 are moved in the left and right directions.

The upper moving member 19 is moved in the lateral direction as the pinion 15 'engaged with the rack 12' at the upper portion of the lower movable member 13 and rotated by the driving force of the decelerating motor 14 ' . Reference numeral 14a denotes a motor shaft.

Accordingly, the control unit (not shown) is operated to drive the decelerating motor 14 to move the lower moving member 19 close to the freeze-drying means 20 and then drive the other decelerating motor 14 ' So that the loading chamber 18 is moved to the freeze-drying means 20 in the right direction in FIG. 1 and the loading chamber 18 is inserted into the freeze-drying chamber 21.

4 is a perspective view of the rail 22 'of the placing table 22 shown in FIG. 4 in the freeze-drying chamber 21, And is rotated.

After the loading chamber 18 is inserted into the freeze-drying chamber 21, the upper moving member 19 and the loading chamber 18 are connected to each other through a desorption port 19 ' 19 '). After the lyophilization is completed, the loading chamber 18 is taken out of the freeze-drying means 20 and moved in the opposite order as described above.

3 and 4 show the lyophilization means 20 of the present invention. The lyophilization means 20 includes a lyophilization chamber 20 in which a lyophilization object (not shown), which is opened and closed by an entrance lid 24, 21). The entrance lid 24 is hinged (not shown) on one side and can be opened and closed.

The freeze-drying chamber 21 has an inner circumferential surface provided with a refrigerant tube 23 through which the refrigerant is circulated by the refrigerant unit 29. A heat medium tube 28 is disposed below the table 22 fixed to the lower side of the freeze- . Reference numeral 22 'denotes a rail for moving the loading chamber 18.

In addition, the present invention includes a heating medium unit (30) for supplying a heating medium to the heating medium pipe (28). As the heating medium, oil is mainly used and other liquid type may be used, and the detailed description will be omitted since it is already known.

4, the freeze-drying chamber 21 has a semi-circular shape in which the refrigerant tube 23 is installed, and a portion where the heat medium tube 28 is provided is disposed on the lower side of the stage 22 And a heat reflecting plate 28 'is provided on the inner peripheral wall of the freeze-drying chamber 21. [

The heating medium unit 30 has a built-in heater 31 to heat the heating medium to a predetermined temperature. The heating temperature can be controlled by a control unit (not shown) The heating medium is supplied to the heat medium pipe 28 of the freeze-drying chamber 21 by the pump 32 and the transfer pipe 33 so as to be circulated.

In addition, the sublimated moisture in the freeze-drying chamber 21 is piped so as to be exhausted through the exhaust pipe 27 by the operation of the vacuum pump 200.

Accordingly, the present invention is first performed with a vacuum process, so that the vacuum pump 200 is operated to maintain the vacuum state of the freeze-drying chamber 21.

Next, the freezing process is carried out so that the refrigerant is circulated through the refrigerant pipe 23 by operating the refrigerant unit 29, so that the freezing and drying chamber 21 is kept at -40 ° C. In this state, the refrigerant is maintained for 8 to 10 hours So that the object to be dried in the loading chamber 18 is frozen.

At this time, since the portion where the refrigerant tube 23 is installed is positioned on the upper side of the freeze-drying chamber 21 having a semicircular shape, the cold air suffers downward, and the hot air is adapted to the upward convection, The efficiency is improved and the processing time is quickened.

Then, the drying process is performed. In this case, the heating medium unit 30 and the pump 32 are operated after the refrigerant unit 29 is stopped, and the heating medium is supplied to the heating medium pipe 28 in the freeze- And at the same time, the vacuum pump 200 is also operated, so that the air in the freeze-drying chamber 21 is sucked.

At this time, the temperature of the freeze-drying chamber (21) is maintained at 60 to 80 ° C for 8 to 10 hours to dry the object in the loading chamber (18).

The freezing temperature, the freezing time, the drying temperature, and the drying time may vary according to the type of the object to be dried in the loading chamber 18. In the freezing process or the drying process, as shown in FIG. 3, When the fan 26 in the freeze-drying chamber 21 is rotated to circulate the inside air, it is possible to freeze and dry more efficiently.

Also, since the heating medium pipe 28 is provided in the lower portion of the freeze-drying chamber 21 during the drying process, the air heated by the heating medium pipe 28 is moved to the upper side and the cold air in the upper side is adapted to the downward movement And the radiant heat is uniformly conveyed by the heat reflecting plate 28 'on the inner circumferential wall of the freeze-drying chamber 21, so that drying efficiency and drying time are greatly improved.

On the other hand, in the drying process, the water contained in the object to be dried sublimates. The sublimed water as described above is referred to as sublimation moisture air for the purpose of facilitating understanding of the present invention.

Therefore, the sublimated moisture in the freeze-drying chamber 21 is discharged through the exhaust pipe 27 by the suction force of the vacuum pump 200, and is transferred to the primary moisture treatment means 40 to be contained in the sublimated moisture air A process in which the water is firstly removed is performed, and this process is continuously performed during the completion of the drying process.

5, the first water treatment means 40 includes a water separation chamber 42 into which a feed pipe 41 connected to the exhaust pipe 27 through which the sublimated moisture in the freeze-drying chamber 21 is discharged is inserted do.

There is water 43 contained in the water separation chamber 42 so that the end of the injection pipe 41 is submerged and the water is supplied to the outside of the water separation chamber 42 by the heating medium unit 50 And has a heating medium chamber (44).

The heating medium unit 50 has a built-in heater 51 to heat the heating medium to a predetermined temperature. The heating temperature can be controlled by a control unit (not shown) The heating medium is supplied and circulated to the heating medium chamber 44 by the circulation pipe 52, the pump 53 and the water return pipe 56.

Accordingly, when the drying temperature of the freeze-drying chamber 21 is in the range of 60 to 80 ° C, the sublimation moisture content air may be in the range of 60 to 80 ° C, but it may be lower than that of the object to be dried.

Therefore, the sublimated water air of 60 to 80 ° C is injected into the water 43 through the inlet tube 41, while the heating medium circulated to the heating medium chamber 44 is heated by the heating medium of 10 to 20 ° C So that the water 43 is maintained at an image temperature of 10 to 30 ° C.

Therefore, the sublimated moisture air is introduced into the water 43 of 10 to 20 占 폚 at 60 to 80 占 폚, so that the sublimated moisture air is rapidly cooled, and the moisture contained in the sublimated moisture air condenses Water is converted into the state of being combined with the water 43, so that water in the sublimated moisture air is removed.

A vertical discharge pipe 47 is provided between the discharge port 45 and the discharge pipe 46 in the upper part of the water separation chamber 42 so as to allow the discharge pipe 41 to pass therethrough. And an elongated vertical heat transfer pipe 53 connected to the circulation pipe 52 through which the heat medium is passed.

The sublimated water vapor discharged through the air exhaust port 45 passes through the water 43 and sucks the heat energy, so that the sublimated moisture air of 50 to 60 ° C is exhausted.

Therefore, the sublimated moisture air that has passed through the water 43 is discharged to the exhaust pipe 46 through the exhaust port 45, and the sublimated moisture air exhausted to the heating medium at 25 to 30 ° C passing through the vertical heat transfer pipe 53 The water contained in the sublimated moisture air is condensed again and is converted into water so that the water drops downward, so that more efficient water removal from the sublimated moisture air can be achieved.

The sublimated moisture air exhausted to the primary moisture treatment means (40) is sent to the secondary water removal glycerin treatment means (60) for secondary water removal.

6, the second water removal glycerin treatment means 60 includes a moisture separation chamber 62 into which a charging pipe 61 connected to the exhaust pipe 46 of the primary moisture treatment means 40 is inserted, And a glycerin (63) accommodated in the water separation chamber (62) so that the end of the inlet pipe (61) is submerged.

The cooling water in the room temperature cold water chamber 64 is circulated by the pump 68 and the circulation pipe 69. The cooling water in the room temperature cold water chamber 64 is circulated by the pump 68 and the circulation pipe 69, (Not shown) or a replenishing water tank (not shown) is provided in the circulation pipe 69. It is a known technique to make such a water replenishment, Shall be omitted.

Therefore, the cooling water at room temperature of 20 to 30 DEG C is circulated in the room-temperature cold water chamber 64, so that the temperature of the glycerin 63 is maintained at 20 to 30 DEG C. In this state, The sublimated moisture air of 50 to 60 ° C is discharged into the glycerin 63 of the water separation chamber 62 through the inlet pipe 61.

Therefore, since the sublimated moisture air of 50 to 60 ° C passes through the glycerin 63 at 20 to 30 ° C, not only the moisture contained in the sublimated moisture air is condensed but also the glycerin 63 has a very good hygroscopicity The water contained in the sublimated water air introduced into the glycerin 63 is absorbed by the glycerin 63, so that the water contained in the sublimated water air is removed.

That is, glycerin (63) is a colorless and odorless liquid, and has a characteristic of very strong viscosity. It is a fat component as well as a fatty acid, and is industrially obtained by decomposing fat. Glycerin is a trihydric alcohol with three hydroxyl groups. It is a colorless, persistent liquid with hygroscopicity. It has little sweetness and has a melting point of 17.8 ℃ and a boiling point of 290 ℃.

In addition, since glycerin (63) is not frozen at minus 40 ° C and is not vaporized even at 250 ° C, it has a characteristic of hygroscopicity to be mixed with water. Therefore, it is mixed well with water coming out of condensed water Since it is not vaporized, the glycerin component is not mixed into the sublimated water air passed through the glycerin (63), and only the sublimated water air is discharged, thereby preventing air pollution.

A vertical discharge pipe 67 is provided between the exhaust port 65 and the exhaust pipe 66 at the upper portion of the water separation chamber 62 so that the discharge pipe 61 is inserted therein. And an elongated vertical heat transfer pipe 69 'connected to the circulation pipe 69 to allow the cooling water to pass therethrough.

Therefore, the sublimated moisture air discharged through the exhaust port 65 is passed through the glycerin 63, and the heat energy is taken away, so that the sublimated moisture air at 40 to 45 ° C is exhausted.

Therefore, in the process of being discharged to the exhaust pipe 66 through the exhaust port 65, the sublimated moisture air exhausted to the cooling water of 20 to 30 ° C. passing through the vertical heat transfer pipe 69 'is deprived of heat energy. The contained water condenses and is converted into water and falls downward, so that more efficient removal of moisture from the sublimated moisture air is achieved.

The exhaust pipe 66 communicated with the exhaust port 65 is exhausted to the tertiary moisture removal processing means 100 described later.

Therefore, in the present invention, the moisture contained in the sublimated water air is absorbed into the glycerin 63 of the second water-removing glycerin treatment means 60, and is removed, thereby improving freeze-drying performance and efficiency.

In order to facilitate the understanding of the present invention, if moisture in the sublimated moisture air is removed by the condenser as in the past, the longer the condenser operating time, the more the moisture in the sublimated moisture is condensed and the surface of the refrigerant, The condenser function is deteriorated due to freezing or freezing of water in the condenser. As a result, the moisture is not properly separated from the sublimated moisture air, and thus the sublimated moisture air containing a large amount of moisture is sucked into the vacuum pump, The pump is broken, and the entire freeze-drier is forced to be shut down, thereby deteriorating freeze-drying performance and efficiency.

However, in the present invention, since the moisture separated by the glycerin (63) is separated from the sublimated moisture air introduced into the secondary water-removing glycerin treatment means (60) and is well separated without freezing, So that freeze-drying performance and efficiency are improved.

On the other hand, in the present invention, since the water separated from the sublimated water air is mixed with the glycerin (63) of the second water removal glycerin treatment means (60), the glycerin water treatment means (70).

6, the glycerin moisture treatment means 70 is connected to the water separation chamber 62 of the second water removal glycerin treatment means 60 by a transfer pipe 71a and is connected to the glycerin 63 And a vaporizing chamber 72 into which the water containing glycerin 73 is placed.

The heating chamber 74 provided outside the vaporizing chamber 72 and supplied with the heating medium by the heating medium unit 80 is provided with an exhaust pipe 76 communicating with the exhaust port 75 above the vaporizing chamber 72, So that water vapor is discharged to the atmosphere.

The heating medium unit 80 has a built-in heater 81 to heat the heating medium to a predetermined temperature. The heating temperature of the heating medium unit 80 can be controlled by a control unit (not shown) The heating medium is supplied and circulated to the heating chamber 74 by the circulation pipe 82, the pump 85 and the water return pipe 86.

A vertical discharge pipe 77 is provided between the exhaust port 75 and the exhaust pipe 76 in the upper portion of the vaporizing chamber 72 so that the discharge pipe 71 is inserted therein. And an elongated vertical heat transfer pipe 83 connected to the circulation pipe 82 through which the heating medium and the cooling water pass.

Therefore, the glycerin (73) containing water flowing into the vaporizing chamber (72) through the inlet pipe (71) flows into the heating chamber (74) at a temperature of 20 to 30 캜, Since the glycerin 73 containing moisture in the vaporizing chamber 72 is heated to 100 DEG C or more, the water contained in the glycerin 73 is evaporated into the vapor state, 75, the water contained in the glycerin 73 is removed.

The water vapor discharged through the exhaust port 65 is transferred from the exhaust port 65 to the exhaust pipe 76 as heat energy of the heating medium passing through the vertical heat transfer pipe 83 is received in the course of passing through the vertical discharge pipe 77, So that the water vapor can be prevented from being cooled and discharged well.

When the glycerin 73 in the vaporization chamber 72 is heated for about 2 to 3 hours, the water contained in the glycerin 73 is almost evaporated into water vapor, so that only pure purified glycerin remains. The heating time of the glycerin (73) can be changed according to the size of the vaporization chamber (72). In order to facilitate understanding of the present invention, pure glycerin will be referred to as purified glycerin as described above.

Therefore, when the above state is established, the pump 92 is operated to cause the water in the vaporizing chamber 72 to evaporate through the transfer pipe 93 to transfer the purified glycerin 73 to the glycerin storing means 90 .

6, there is a storage room 91 in which the glycerin 73 discharged from the vaporization chamber 72 is transferred by the pump 92 and the transfer pipe 93 to be stored therein, The glycerin storage means 90 is configured such that the purified glycerin 93 of the first water removal device 91 is transferred by the pump 95 and the transfer pipe 94 to the moisture separation chamber 62 of the second water removal glycerin treatment means 60, Respectively.

Therefore, the present invention is characterized in that the water-containing glycerin (63) in the water separation chamber (62) of the second water removal glycerin treatment means (60) is transferred to the vaporization chamber (72) of the glycerin partial treatment means The purified pure glycerin 96 is transferred to the water separation chamber 62 of the second water removal glycerin treatment means 60 and used. Therefore, glycerin Waste due to recycling is not caused.

On the other hand, the sublimated moisture air separated from the moisture in the water separation chamber 62 of the secondary water removal glycerin treatment means 60 is passed through the exhaust pipe 66 at a water content of 20 to 30% ), And water is removed thirdarily.

7 to 9, the tertiary moisture removal processing means 100 includes a water separation means 101 for separating the moisture in the air, And a refrigerant cooling unit 130 for cooling the refrigerant.

The water separating means 101 is provided with a branch chamber 122 communicated with an air inlet 121 connected directly to the exhaust pipe 66 of the second water removal glycerin processing means 60.

A refrigerant chamber (110) having upper and lower blocking members (111, 112) is formed below the branch room (122) to constitute a refrigerant chamber (113).

An air chamber 123 having an exhaust port 125 and a drain port 126 is provided on the upper and lower sides of the coolant chamber 110 and an air shuttle chamber 124 is provided below the coolant chamber 110.

The refrigerant chamber 113 is vertically provided with a plurality of water separation pipes 120 each having a vent hole 120a for allowing the branch room 122 and the air U-turn chamber 124 to communicate with each other.

It is preferable that the plurality of water separation pipes 120 are arranged in four directions around the refrigerant charging pipe 117 as shown in FIG.

A refrigerant supply tube 115 provided on the branch chamber 122 and a refrigerant inlet tube 117 for supplying the refrigerant K to the refrigerant chamber 113 in the refrigerant supply chamber 115 .

10, it is preferable that the lower end of the refrigerant charging pipe 117 is formed to be lowered close to the lower portion of the refrigerant chamber 113 so that the refrigerant diffusion space 118 is formed below the end of the refrigerant charging pipe 117 Do.

The present invention further includes a coolant supply port 115 and a coolant inlet port 116 provided in the coolant chamber 110 and a coolant cooling unit 130 connected to the coolant outlet port 119 to circulate the coolant.

The refrigerant cooling unit 130 is a known device for cooling and circulating the refrigerant having a hot heat, so that detailed description and explanation will be omitted. Reference numeral 140 denotes a refrigerant cooling unit, (101).

Since the exhaust port 125 of the water separating means 101 is connected to the vacuum pump 200 shown in FIG. 1, the air in the air chamber 123 is sucked by the vacuum pump 200.

Therefore, the sublimated water flowed into the air inlet 121 flows into the vent hole 120a of each of the water separation pipes 120 through the branch chamber 122 as shown in Figs. 10 and 11, 124).

On the other hand, the refrigerant K flowing through the refrigerant inlet 116 is supplied to the refrigerant supply chamber 115 and the refrigerant inlet pipe 117, and is introduced into the lower refrigerant diffusion space 118.

Therefore, the refrigerant K flows from the lower portion of the refrigerant chamber 113 of the refrigerant chamber 110 toward the upper refrigerant outlet 119.

Therefore, the sublimated moisture air having heat and moisture moves from the branch chamber 122 to the air U-turn chamber 124 through the water separation pipe 120, while the refrigerant K flows into the refrigerant diffusion space portion 118 The refrigerant flows to the refrigerant outlet (119) side, and flows toward the upper side from the lower portion of the refrigerant chamber (113).

That is, the sublimated moisture air flow direction and the refrigerant (K) moving direction flow in opposite directions to each other. In this state, the heat energy of the sublimated moisture air is transferred to the refrigerant K, As a result, the moisture contained in the sublimated moisture air condenses and becomes a water droplet, and falls or flows down to the lower portion of the air U-turn chamber 124, so that moisture in the sublimated moisture air is separated and removed.

Particularly, in the present invention, since the sublimated moisture air moving direction and the refrigerant (K) moving direction flow in opposite directions to each other, the refrigerant K flows from the refrigerant diffusion space portion 118, which is the lower side of the refrigerant chamber 113, The temperature of the refrigerant K is relatively more toward the upper side of the refrigerant chamber 113 having the refrigerant outlet 119 than the lower side of the refrigerant chamber 113 because the heat energy of the sublimated moisture air is absorbed Lt; / RTI >

Subsequently, the sublimated moisture air flows into the upper portion of the vent hole 120a of the water separating pipe 120 and is moved downward. As the heat energy is absorbed by the refrigerant K, the temperature gradually decreases as it moves downward. Since the temperature of the lower side refrigerant K is lower than that of the upper side of the chamber 113, it is possible to absorb the heat energy of the sublimated moisture air whose temperature gradually decreases as it moves downward.

Therefore, in the process of moving the sublimated moisture air having heat and moisture from the upper branched chamber 122 to the lower air U-turn chamber 124, the ventilation holes 120a Since the heat absorption to the refrigerant K is entirely performed on the entire inner circumferential surface of the submerged moisture chamber, the sublimated moisture air is reliably cooled, thereby ensuring the condensation of moisture in the submerged moisture air.

That is, since the third-order moisture removal processing means 100 of the present invention causes the refrigerant K to be directly introduced into the water separating means 101 serving as a heat exchanger, the refrigerant K and the sublimated water air are directly subjected to heat exchange And the water can be condensed. Since the cooling temperature can be up to -80 占 폚, the sublimated water air passing through the vent hole 120a of the water separation pipe 120 is rapidly cooled and the water is condensed The speed can be accelerated.

When the moisture separating pipe 120 in which water is condensed is made of a transparent pile-reinforced glass tube and the entire refrigerant chamber 110 and the air chamber 123 or a part thereof outside thereof is made of a transparent tempered glass plate, It can be confirmed that moisture is condensed, so that it can be visually confirmed whether the third water removal processing means 100 is normally operated.

Subsequently, the sublimated moisture air separated from the water in the water separation pipe 120 is swirled upward in the air U-turn chamber 124 and is transferred to the vacuum pump 200 through the upper exhaust port 125 At this time, the air chamber 123 is located outside the refrigerant chamber 110, so that the sublimated water is brought into contact with the refrigerant chamber 110 during the movement of the sublimated moisture air between them. The water in the sublimated moisture air condenses and separates, so that the water separating action is surely separated from the sublimated moisture air. Therefore, there is almost no moisture in the sublimated moisture air exhausted through the exhaust port 125 Only the cooled air is transferred to the vacuum pump 120.

Therefore, since the vacuum pump 200 is in a state of sucking only air having little moisture, the vacuum pump 200 is protected in a state in which the vacuum pump 200 is not damaged, so that the food freeze dryer can be operated satisfactorily .

If the moisture content of the sublimated moisture air is high, it is sufficient that the water separation is performed continuously by two or more tertiary moisture removal processing means 100 as shown in FIG.

Accordingly, since the air having a very low moisture content is sucked and sucked into the vacuum pump 200, the failure of the vacuum pump 200, which is relatively expensive, is hardly caused. Therefore, The vacuum pump 200 can be operated continuously without stopping the operation of the freeze-drying machine because the vacuum pump 200 is no longer running. Therefore, the productivity of the freeze-dried product can be improved significantly as well as the cost of repairing the trouble.

Further, since the lifetime of the vacuum pump 200 is increased, maintenance is easy and the cost of re-purchasing the vacuum pump 200 is reduced, thereby improving the economical efficiency.

It is to be understood that the invention is not limited to the details shown and described hereinabove and that various changes in form and details may be made by those skilled in the art without departing from the scope of the invention. It is self-evident.

10: Loading means 18: Loading chamber
20: freeze-drying means 21: freeze-drying chamber
23: refrigerant tube 28: heating medium tube
28 ': Heat reflector 29: Refrigerant unit
30, 50, 80: heating medium unit 40: primary moisture treatment means
60: Secondary water removal glycerin treatment means 70: Glycerine moisture treatment means
90: Glycerine storage means 41, 61, 71:
42, 62: water separation chamber 43: water
44: heating medium chamber 45, 65, 75:
46, 66, 76: exhaust pipe 47, 67, 77:
63: glycerin 64: room temperature cold water room
72: Evaporation chamber 73,96: Glycerin
74: heating chamber 91: storage chamber
100: tertiary moisture removal processing means 101: water separation means
110: Refrigerant chamber 113: Refrigerant chamber
115: Refrigerant supply chamber 116: Refrigerant inlet
117: Refrigerant inlet pipe 118: Refrigerant diffusion space
119: Refrigerant outlet 120: Water separation pipe
121: air inlet 122: branching chamber
123: Air chamber 124: Air U-turn chamber
125: exhaust port 126: drain port
130: Refrigerant cooling unit 200: Vacuum pump

Claims (5)

A refrigerant pipe (23) having a semicircular upper portion on the upper side of the freeze-drying chamber (21) in which the freeze-dried object accommodated in the loading chamber (18) is opened and closed by the entrance lid (24) and the refrigerant is circulated by the refrigerant unit Is provided on the inner circumferential surface of the semicircular freeze-drying chamber (21) so that the cold air is convex downward and the heat medium unit (30) is connected to the lower part of the bench And a heat medium pipe 28 through which the heat medium is circulated is provided so that hot air is convex in the upward direction and heat energy of the hot air is radiated to the four sides, A freeze-drying means (20) provided with a heat reflecting plate (28 ');
A water separation chamber 42 into which a discharge pipe 41 connected to an exhaust pipe 27 through which the sublimated moisture in the freeze drying chamber 21 is discharged is inserted and a water separation chamber 42 A first water treatment unit 40 having water 43 accommodated in the water separation chamber 42 and a heating chamber 44 provided outside the moisture separation chamber 42 and supplied with a heating medium by the heating unit 50;
A water separation chamber 62 into which an inlet pipe 61 connected to an exhaust pipe 46 communicated with an exhaust port 45 at an upper portion of the water separation chamber 42 is inserted; The cooling water in the room temperature state of the room temperature cold water chamber 64 is supplied to the pump 68 and the cooling water in the room temperature water cooling chamber 64 is supplied to the outside of the water separation chamber 62. [ And a circulation pipe (69) for circulating the second water-removed glycerin (60);
And a vacuum pump (200) for sucking in air for vacuuming the freeze-drying chamber (21).
The method according to claim 1,
The transfer pipe 71a connected to the water separation chamber 62 of the secondary water removal glycerin treatment means 60 and the injection pipe 71 connected to the pump 71b are inserted so that the water- A heating chamber 74 provided outside the vaporizing chamber 72 and supplied with a heating medium by a heating medium unit 80 and a heating chamber 74 connected to an exhaust port 75 on the upper side of the vaporizing chamber 72, (70) configured to discharge vaporized air to the exhaust pipe (76);
There is a storage chamber 91 in which the glycerin 73 discharged from the vaporization chamber 72 is transported and received by the pump 92 and the transfer pipe 93 and the purified glycerin 93 of the storage chamber 91 Further comprising a glycerin storage means (90) configured to be transferred to the water separation chamber (62) of the second water removal glycerin treatment means (60) by a pump (95) and a transfer pipe (94) A food freeze dryer comprising a protective means.
4. The method according to any one of claims 1 to 3,
The inlet pipes 41, 61, 71 are installed between the exhaust ports 45, 65, 75 and the exhaust pipes 46, 66, 76 at the upper portions of the water separation chambers 42, And the vertical discharge pipes (47, 67, 77) are connected to the circulation pipes (52, 69, 82) at the outer periphery of the vertical discharge pipes (47, 67, 77) , And a heat transfer pipe (53, 69 ', 83), respectively.
The method according to claim 1,
A branch room 122 communicating with an air inlet 121 connected directly to the exhaust pipe 66 of the secondary moisture removal glycerin treatment means 60 and an upper and lower blocking members And an air chamber 123 having an exhaust port 125 and a drain port 126 at upper and lower portions of the refrigerant chamber 110. The air chamber 123 is formed outside the coolant chamber 110, And a plurality of water separation pipes 120a and 120b having a vent hole 120a through which the branch room 122 and the air U-turn chamber 124 communicate with each other, And a refrigerant inlet pipe 117 for supplying the refrigerant to the refrigerant chamber 113 from the refrigerant supply chamber 115. The refrigerant supply pipe 115 communicates with the refrigerant inlet pipe 117, (101) having water separation means
And a refrigerant cooling unit 130 connected to the refrigerant inlet 116 and the refrigerant outlet 119 of the refrigerant supply chamber 115 and the refrigerant chamber 110, respectively, Further comprising a vacuum pump protecting means for protecting the freezing chamber.
5. The method of claim 4,
The lower end of the refrigerant inlet pipe 117 is moved downward close to the lower portion of the refrigerant chamber 113 to have a refrigerant diffusion space 118 below the end of the refrigerant inlet pipe 117, And a plurality of water separation pipes (120) are installed on the refrigerant inlet pipe (117) in all directions.

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