CN207527917U - A double drying device - Google Patents

Abstract

The utility model discloses a double drying device, including an adsorption dryer, a buffer tank, a freeze dryer, and a vacuum pump. The air outlet pipe of the adsorption dryer is connected to the buffer tank, the air inlet pipe of the freeze dryer is connected to the buffer tank, and the exhaust pipe of the freeze dryer is connected to the vacuum pump; the air inlet pipe, the exhaust pipe, and the air outlet pipe of the adsorption dryer are respectively provided with valves. The gas entering the freeze dryer of the utility model will be dried and dehydrated by the adsorption dryer first, thereby avoiding the secondary introduction of water, and effectively ensuring the effect of freeze drying.

Description

A double drying device

technical field

The utility model relates to the technical field of drying equipment, in particular to a double drying device with an adsorption dryer and a freeze dryer.

Background technique

There are various drying methods, such as sun-drying, boil-drying, drying, spray-drying and vacuum-drying, etc., but common drying methods are usually carried out at temperatures above 0°C or higher. The products obtained by drying generally have the problems of shrinking in size and hardening of texture, most of the volatile components will be lost, some heat-sensitive substances will be denatured and inactivated, and some substances will even be oxidized. Therefore, compared with the product before drying, there is a big difference in properties after drying. The freeze-drying method is basically carried out below 0°C, that is, when the product is frozen, and only when the residual moisture content of the product is reduced in the later stage, the product is raised to a temperature above 0°C, but generally not exceeding 40°C. Under vacuum conditions, when the water vapor is sublimated directly, the drug remains in the ice shelf when it freezes, forming a porous structure similar to a sponge, so its volume is almost unchanged after drying.

Generally, in order to speed up the drying efficiency, freeze-drying will use a certain negative pressure or even dry in a near-vacuum environment. After vacuum freeze-drying, to take out the dried items, it is necessary to inject gas into the vacuum freeze dryer to restore the atmospheric pressure. However, if the air containing moisture is directly injected, the moisture will instantly condense on the items, greatly affecting the drying effect.

Utility model content

In order to solve the deficiencies of the prior art, the utility model aims to provide a double drying device.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A double drying device disclosed in the utility model includes an adsorption dryer, a buffer tank, a freeze dryer, a vacuum pump,

The freeze dryer includes a stainless steel cavity, a glass cover, an outer casing, a refrigerator, a support column, a load cell, a sealing rubber ring, a placement table, a microwave reflection layer, and a microwave absorbing layer. The glass cover is connected with the sealing rubber ring The stainless steel cavity is connected to form a closed cavity, and the inner wall of the sealing rubber ring is sequentially connected to the microwave reflection layer and the microwave absorption layer from top to bottom, and the microwave reflection layer and the microwave absorption layer are respectively provided with air holes; the refrigerator and the weighing sensor are installed in the stainless steel cavity, the placement table is located above the microwave reflection layer, the placement table is connected with the load cell through a support column, and the support column passes through the microwave reflection layer and the microwave absorption layer; the stainless steel cavity The body is provided with an intake pipe and an exhaust pipe; the outer shell is covered outside the glass cover, and a microwave generator is installed on the inner wall of the outer shell;

The outlet pipe of the adsorption dryer is connected to the buffer tank, the inlet pipe of the freeze dryer is connected to the buffer tank, and the exhaust pipe of the freeze dryer is connected to the vacuum pump; the inlet pipe, exhaust pipe and adsorption drying The outlet pipes of the machine are respectively provided with valves.

The gas entering the freeze dryer will first be dried and dehydrated by the adsorption dryer, thereby avoiding the secondary introduction of moisture and effectively ensuring the effect of freeze drying.

Further, the exhaust pipe is provided with a one-way valve that only allows gas to be discharged from the freeze dryer, which can prevent the gas with moisture from entering the freeze dryer reversely from the exhaust pipe.

Further, infrared lamps are installed on the inner wall of the top surface of the housing, and under the joint action of microwave and infrared, the efficiency of water sublimation can be further improved.

Preferably, the cross section of the outer shell is circular, the bottom surface of the outer shell is provided with a chute, and the outer shell is connected with a driving mechanism for driving it to rotate in the chute; a conductive slip ring is installed on the outer side of the outer shell, and the conductive The slip ring is electrically connected with the microwave generator and the infrared lamp. The outer cover can rotate around the glass cover, making the microwave field and infrared radiation more uniform, which is conducive to the comprehensive and rapid drying of freeze-dried items.

Preferably, the driving mechanism includes a motor and a roller, the central axis of the roller is connected to the rotating shaft of the motor, the roller is connected to the outer wall of the outer shell by pressing, the motor drives the roller to rotate, and the roller drives the outer shell to rotate through friction.

Further, there is a gap between the microwave reflection layer and the microwave absorption layer, and the ventilation holes of the microwave reflection layer and the ventilation holes of the microwave absorption layer are arranged alternately. The staggered arrangement of ventilation holes can further reduce the penetration of microwaves.

Further, a temperature sensor and a pressure sensor are installed on the placing table, which can monitor the temperature and air pressure information in the freeze-drying chamber in real time.

Preferably, the microwave reflective layer is a metal plate or metal mesh; the microwave absorbing layer is a plate made of foam absorbing material.

Preferably, the sealing rubber ring is a silicone sealing ring, which has strong low temperature resistance and long service life.

The utility model has the following beneficial effects:

1. The gas entering the freeze dryer of the utility model will be dried and dehydrated first by the adsorption dryer, thereby avoiding the secondary introduction of moisture, effectively ensuring the effect of freeze drying;

2. The utility model uses the microwave reflective layer to reflect most of the microwaves, and after being absorbed by the microwave absorbing layer, almost no microwaves can penetrate into the stainless steel cavity, thereby avoiding the influence of microwaves on the weight;

3. The utility model uses microwaves and infrared rays to act on freeze-dried items at the same time. After water molecules receive the energy of microwaves and infrared rays, their mobility increases, and in addition, it is conducive to rapid sublimation in a vacuum environment, thereby achieving rapid drying. Purpose;

4. The outer cover can rotate around the glass cover, making the microwave field and infrared radiation more uniform, which is conducive to the comprehensive and rapid drying of freeze-dried items.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of freeze dryer;

In the figure: adsorption dryer 100, buffer tank 200, freeze dryer 300, stainless steel cavity 301, glass cover 302, outer casing 303, microwave generator 304, infrared lamp 305, refrigerator 306, support column 307, weighing Sensor 308, microwave absorbing layer 309, sealing rubber ring 310, microwave reflecting layer 311, placing table 312, air intake pipe 313, chute 314, motor 315, roller 316, conductive slip ring 317, exhaust pipe 318, vacuum pump 400, valve 500, check valve 600.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a dual drying device disclosed in the present invention includes an adsorption dryer 100, a buffer tank 200, a freeze dryer 300, and a vacuum pump 400.

The freeze dryer 300 includes a stainless steel cavity 301, a glass cover 302, an outer shell 303, a refrigerator 306, a support column 307, a load cell 308, a sealing rubber ring 310, a placement table 312, a microwave reflection layer 311, and a microwave absorption layer 309, The glass cover 302 is connected to the stainless steel cavity 301 through the sealing rubber ring 310 to form a closed cavity, and the inner wall of the sealing rubber ring 310 is connected to the microwave reflection layer 311 and the microwave absorption layer 309 sequentially from top to bottom, and the microwave reflection layer 311 and the microwave absorption layer 309 are respectively provided with ventilation holes; Refrigerator 306 and load cell 308 are installed in the stainless steel cavity 301, placing table 312 is positioned at the top of microwave reflection layer 311, and placing table 312 is connected with load cell 308 through support column 307, and support column 307 passes through the microwave reflection layer 311 and the microwave absorption layer 309; the stainless steel cavity 301 is provided with an intake pipe 313 and an exhaust pipe 318; the outer shell 303 is covered outside the glass cover 302, and the inner wall of the outer shell 303 is equipped with a microwave generator 304 ;

The outlet pipe of the adsorption dryer 100 is connected with the buffer tank 200, the inlet pipe 313 of the freeze dryer 300 is connected with the buffer tank 200, and the exhaust pipe 318 of the freeze dryer 300 is connected with the vacuum pump 400; the inlet pipe 313, the exhaust pipe 318 and the outlet pipe of the adsorption dryer 100 are respectively provided with a valve 500 .

In order to prevent backflow from occurring, the exhaust pipe 318 is provided with a one-way valve 600 that only allows gas to be discharged from the freeze dryer 300 . The one-way valve 600 can prevent the gas with moisture from entering the freeze dryer 300 reversely from the exhaust pipe 318 .

In order to further improve the efficiency of water sublimation, an infrared lamp 305 is installed on the inner wall of the top surface of the housing cover 303, and under the joint action of microwave and infrared, the efficiency of water sublimation can be further improved.

In order to make the sublimation more uniform, the cross section of the outer casing 303 is circular, and the bottom surface of the outer casing 303 is provided with a chute 314, and the outer casing 303 is connected with a driving mechanism that drives it to rotate in the chute 314; The conductive slip ring 317 is electrically connected to the microwave generator 304 and the infrared lamp 305 . The outer cover 303 can rotate around the glass cover 302, so that the microwave field and infrared radiation are more uniform, which is beneficial to the comprehensive and rapid drying of freeze-dried items.

Specifically, the drive mechanism includes a motor 315 and a roller 316. The central axis of the roller 316 is connected to the rotating shaft of the motor 315. The roller 316 is connected to the outer wall of the housing cover 303 by pressing. The motor 315 drives the roller 316 to rotate. The outer cover 303 rotates.

In order to further hinder the penetration of microwaves, there is a gap between the microwave reflective layer 311 and the microwave absorbing layer 309 , and the vent holes of the microwave reflective layer 311 and the vent holes of the microwave absorbing layer 309 are arranged alternately. The staggered arrangement of ventilation holes can further reduce the penetration of microwaves.

For real-time monitoring, a temperature sensor and a pressure sensor are installed on the placing table 312, which can monitor the temperature and air pressure information in the freeze-drying chamber in real time.

Specifically, the microwave reflective layer 311 is a metal plate or metal mesh; the microwave absorbing layer 309 is a plate made of foam absorbing material; the sealing rubber ring 310 is a silicone sealing ring, which has strong low temperature resistance and long service life.

The using method of the present utility model is as follows:

Uncover the outer shell cover 303 and the glass cover 302, place the required freeze-dried items on the placement table 312, then cover the glass cover 302 and the outer cover 303 in turn, turn on the vacuum pump 400, and the glass cover 302 and the stainless steel chamber are vacuumed. The body 301 presses the sealing rubber ring 310 at the same time to achieve a sealing effect. Freeze-drying can be implemented by turning on the refrigerator 306, the microwave generator 304 and the infrared lamp 305. The gas dried and dehydrated by the adsorption dryer 100 is stored in the buffer tank 200. When the adsorption dryer 100 is turned on, the dry gas stored in the buffer tank 200 is directly poured into the glass cover 302 to restore the atmospheric pressure, and then the items can be taken out. .

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (9)

1. A double drying device, characterized in that: comprising an adsorption dryer (100), a buffer tank (200), a freeze dryer (300), a vacuum pump (400), The freeze dryer (300) comprises a stainless steel cavity (301), a glass cover (302), an outer casing (303), a refrigerator (306), a support column (307), a load cell (308), a sealing rubber ring (310), placing platform (312), microwave reflective layer (311), microwave absorbing layer (309), described glass cover (302) is connected with stainless steel cavity (301) by sealing rubber ring (310) to form airtight cavity , the inner wall of the sealing rubber ring (310) is sequentially connected to the microwave reflection layer (311) and the microwave absorption layer (309) from top to bottom, and the microwave reflection layer (311) and the microwave absorption layer (309) are respectively provided with Breathing holes; the refrigerator (306) and the load cell (308) are installed in the stainless steel cavity (301), the placement table (312) is located above the microwave reflection layer (311), and the placement table (312) passes through The support column (307) is connected with the load cell (308), and the support column (307) passes through the microwave reflection layer (311) and the microwave absorption layer (309); the stainless steel cavity (301) is provided with an air inlet pipe ( 313) and exhaust pipe (318); the outer shell cover (303) is covered outside the glass cover (302), and the inner side wall of the outer shell cover (303) is equipped with a microwave generator (304); The air outlet pipe of the adsorption dryer (100) is connected with the buffer tank (200), the inlet pipe (313) of the freeze dryer (300) is connected with the buffer tank (200), and the discharge pipe of the freeze dryer (300) The air pipe (318) is connected to the vacuum pump (400); the air inlet pipe (313), the exhaust pipe (318) and the air outlet pipe of the adsorption dryer (100) are respectively provided with valves (500). 2. A double drying device according to claim 1, characterized in that: the exhaust pipe (318) is provided with a one-way valve (600) that only allows gas to be discharged from the freeze dryer (300). 3. A double drying device according to claim 1, characterized in that: an infrared lamp (305) is installed on the inner wall of the top surface of the housing cover (303). 4. A double drying device according to claim 3, characterized in that: the cross section of the outer shell (303) is circular, the bottom surface of the outer shell (303) is provided with a chute (314), and the outer shell (303) is provided with a chute (314). (303) is connected with the driving mechanism that drives it to rotate in chute (314); Outer shell cover (303) is equipped with conduction slip ring (317), and described conduction slip ring (317) and microwave generator (304) and The infrared lamp (305) is electrically connected. 5. A double drying device according to claim 4, characterized in that: the driving mechanism comprises a motor (315), a roller (316), the central axis of the roller (316) and the rotating shaft of the motor (315) To connect, the roller (316) is pressed and connected with the outer wall of the outer shell (303). 6. A kind of double drying device according to claim 1, characterized in that: there is a gap between the microwave reflection layer (311) and the microwave absorption layer (309), and the air holes of the microwave reflection layer (311) are in contact with the microwave The ventilation holes of the absorption layer (309) are arranged in a staggered manner. 7. A double drying device according to claim 1, characterized in that: a temperature sensor and a pressure sensor are installed on the placing table (312). 8. A double drying device according to claim 1, characterized in that: the microwave reflecting layer (311) is a metal plate or metal mesh; the microwave absorbing layer (309) is a board made of foam absorbing material . 9. A double drying device according to claim 1, characterized in that: the sealing rubber ring (310) is a silicone sealing ring.