Water vapor capturing device for freeze-drying

Abstract

A water vapor catching device for freeze drying relates to the field of freeze dryer machinery and comprises a mounting frame and a plurality of water vapor catchers, a plurality of pore plates are uniformly distributed on the mounting frame, the water vapor catchers are inserted into the pore plates, cooling media of the water vapor catchers are liquid nitrogen, one end of each water vapor catcher is provided with an exhaust pipe, and the other end of each water vapor catcher is provided with an exhaust pipe. A gas collecting tank is arranged at the end, away from the water vapor catcher, of the exhaust pipe, a gas outlet pipe is arranged on the gas collecting tank, a gas liquefying device is arranged at the end, away from the gas collecting tank, of the gas outlet pipe and used for converting nitrogen into liquid nitrogen, a liquid outlet pipe is arranged on the gas liquefying device, and the end, away from the gas liquefying device, of the liquid outlet pipe is fixedly communicated with the water vapor catcher. A defrosting water supporting plate is arranged on the pore plate, a plurality of first defrosting water pipes are arranged on the defrosting water supporting plate in a penetrating mode, the first defrosting water pipes are evenly distributed between the liquid supply collecting pipe and the air return collecting pipe, a defrosting water collecting pipe is arranged at one end of each first defrosting water pipe, and a water inlet pipe is arranged on each defrosting water collecting pipe. The method has the effect of improving the safety.

Description

Technical Field

[0001] The present application relates to the field of freeze dryer machinery, and in particular to a device for capturing water vapor for freeze drying. Background Art

[0002] A freeze dryer is a mechanical device that performs low-temperature drying on medicines, health products, foods, etc. It is generally composed of seven systems and two main devices: a drying box and a water trap. The seven systems are: refrigeration system, vacuum system, hydraulic system, heat exchange system, pneumatic system, control system, cleaning and steam sterilization system. The water vapor capture device usually uses the condensation method, using a low-temperature condenser to condense water vapor into liquid water.

[0003] In the related art, the water collector includes a refrigeration coil, into which refrigeration oil is introduced to achieve a refrigeration effect. When water vapor from a drying box flows through the water collector coil, it solidifies on a low-temperature surface under vacuum conditions to achieve the purpose of capturing water.

[0004] Regarding the above-mentioned related technologies, some coils are of top-in and bottom-out type, and some are of bottom-in and top-out type. The refrigerant oil in the latter type of coil is easily accumulated in the coil, which will cause the refrigeration compressor to lack oil and cause accidents. Utility Model Content

[0005] In order to improve safety, the present application provides a freeze-drying water vapor capture device.

[0006] The present application provides a freeze-drying water vapor capture device, which adopts the following technical solution:

[0007] A water vapor capture device for freeze drying comprises a mounting frame and a plurality of water vapor capturers, wherein the mounting frame is evenly provided with a plurality of orifice plates, the water vapor capturers are inserted on the orifice plates, the cooling medium of the water vapor capturers is liquid nitrogen, an exhaust pipe is provided at one end of the water vapor capturer, a gas collecting tank is provided at one end of the exhaust pipe away from the water vapor capturer, an air outlet pipe is provided on the gas collecting tank, a gas liquefaction device is provided at one end of the air outlet pipe away from the gas collecting tank, the gas liquefaction device is used to convert nitrogen into liquid nitrogen, a liquid outlet pipe is provided on the gas liquefaction device, one end of the liquid outlet pipe away from the gas liquefaction device is fixedly connected with the water vapor capturer, a defrosting water support plate is provided on the orifice plate, a plurality of first defrosting water pipes are inserted on the defrosting water support plate, a defrosting water collecting pipe is provided at one end of the first defrosting water pipe, a water inlet pipe is provided on the defrosting water collecting pipe, and a plurality of first water spraying ports are evenly provided on the first defrosting water pipe.

[0008] By adopting the above technical solution, the gas liquefaction device liquefies nitrogen and then passes it into the water vapor trap. The liquid nitrogen absorbs heat and is converted into nitrogen, which reduces the surface temperature of the water vapor trap to adsorb water vapor. The gas enters the gas liquefaction device from the exhaust pipe again and will not remain in the water vapor trap, thereby improving the safety of the equipment. The water capture effect is improved by setting up multiple groups of water vapor traps.

[0009] Optionally, the water vapor capturer includes a liquid supply manifold, a plurality of liquid supply pipes, an air return manifold and an air return pipe, one end of the liquid supply pipe is fixedly connected to the liquid supply manifold, one end of the liquid supply pipe is fixedly connected to the air return manifold, the air return manifold is fixedly connected to the air return pipe, a valve is provided at one end of the return pipe away from the return pipe, the end of the valve away from the return pipe is connected to the exhaust pipe, and a pressure gauge is provided on the valve near one end of the return pipe.

[0010] By adopting the above technical solution, the pressure gauge can display the pressure in the water vapor trap in real time, open the valve in time to discharge the gas from the exhaust pipe, and improve the safety of the equipment.

[0011] Optionally, the first defrosting water pipes are evenly distributed between the liquid supply header and the air return header, one end of the first defrosting water pipe away from the defrosting water header is closed, and the length direction of the first defrosting water pipe is consistent with the arrangement direction of the orifice plate.

[0012] By adopting the above technical solution, the length direction of the first defrosting water pipe is consistent with the arrangement direction of the orifice plate, the orifice plate is evenly arranged on the liquid supply pipe, and the evenly distributed first water spray ports on the first defrosting water pipe face the liquid supply pipe, thereby improving the cleaning effect of the defrosting water on the surface of the liquid supply pipe.

[0013] Optionally, a plurality of first defrosting water pipes and a plurality of second defrosting water pipes are provided on the defrosting water support plate, the second defrosting water pipes include a first water spray pipe and a second water spray pipe, one end of the first water spray pipe is fixedly connected to the defrosting water collecting pipe, a plurality of second water spray outlets are evenly provided on the first water spray pipe, the second water spray pipe is located at an end of the first water spray pipe away from the defrosting water collecting pipe, the second water spray pipe is closed at an end away from the first water spray pipe, a plurality of nozzles are evenly provided on the second water spray pipe, the liquid supply pipe includes a plurality of straight pipes and a plurality of curved pipes, the second water spray outlets are evenly distributed along the length direction of the straight pipe, and the length direction of the second water spray pipe is the same as the arrangement direction of the curved pipes.

[0014] By adopting the above technical solution, the first water spray pipe sprays water towards the straight pipe, and the second water spray pipe sprays water towards the curved pipe through the nozzle, thereby improving the cleaning effect of the liquid supply pipe.

[0015] Optionally, the outer wall of the liquid outlet pipe is covered with an antifreeze sleeve.

[0016] By adopting the above technical solution, the antifreeze sleeve can reduce the situation of frostbite caused by touching the outer wall of the liquid outlet pipe, thereby improving safety.

[0017] Optionally, a water collecting pan is provided under the installation frame, a drain pipe is provided on a side of the water collecting pan away from the installation frame, a purification box is provided at the end of the drain pipe away from the water collecting pan, a water outlet pipe is provided at the bottom of the purification box, the end of the water outlet pipe away from the purification box is connected to the water inlet pipe, and a purification device is provided in the purification box.

[0018] By adopting the above technical solution, the purification device can purify the water discharged from the water receiving tray and then transport it to the water inlet pipe, thereby reducing water waste.

[0019] Optionally, the connection point between the purification box and the drain pipe is located above the purification device.

[0020] By adopting the above technical solution, the water discharged from the drain pipe can completely pass through the purification device, thereby improving the purification effect.

[0021] Optionally, a water pump is provided on the water outlet pipe.

[0022] By adopting the above technical solution, the efficiency of water recycling is improved.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The gas liquefaction device liquefies the gas and passes it into the water vapor trap. The liquid nitrogen absorbs heat and turns into gas, which reduces the surface temperature of the water vapor trap to absorb water vapor. The gas enters the gas liquefaction device from the exhaust pipe again and will not remain in the water vapor trap, thereby improving the safety of the equipment. The water capture effect is improved by setting up multiple groups of water vapor traps. The liquid nitrogen absorbs heat and turns into nitrogen, thereby improving the cooling effect.

[0025] 2. The pressure gauge can display the pressure in the water vapor trap in real time, and open the valve in time to discharge the gas from the exhaust pipe to improve the safety of the equipment;

[0026] 3. The length direction of the first defrosting water pipe is consistent with the arrangement direction of the orifice plate, the orifice plate is evenly arranged on the liquid supply pipe, and the evenly distributed first water spray ports on the first defrosting water pipe face the liquid supply pipe, thereby improving the cleaning effect of the defrosting water on the surface of the liquid supply pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0028] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0029] Figure 3 It is a structural schematic diagram of the first defrosting water pipe in Example 1.

[0030] Figure 4 It is a schematic diagram of the overall structure of Example 2.

[0031] Figure 5 It is a structural schematic diagram of the second defrosting water pipe in Example 2.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. mounting frame; 11. orifice plate; 12. defrosting water support plate; 2. water vapor capturer; 21. exhaust pipe; 22. liquid supply manifold; 23. liquid supply pipe; 231. straight pipe; 232. elbow pipe; 24. return air manifold; 25. return air pipe; 251. valve; 252. pressure gauge; 3. gas collecting tank; 31. air outlet pipe; 4. gas liquefaction device; 41. liquid outlet pipe; 411. antifreeze sleeve; 5. defrosting water collecting pipe; 51. first defrosting water pipe; 511. first water spray port; 52. second defrosting water pipe; 521. first water spray pipe; 5211. second water spray port; 522. second water spray pipe; 5221. nozzle; 53. water inlet pipe; 6. water receiving tray; 61. drain pipe; 7. purification box; 71. water outlet pipe; 711. water pump; 72. purification device. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] Example 1

[0035] The embodiment of the present application discloses a device for capturing water vapor for freeze drying.

[0036] Reference Figure 1 A water vapor capture device for freeze drying comprises an installation frame 1, a plurality of water vapor capturers 2 and a gas liquefaction device 4. The cooling medium in the water vapor capturer 2 is liquid nitrogen. The nitrogen is converted into liquid nitrogen in the gas liquefaction device 4. The liquid nitrogen is converted into nitrogen when flowing in the water vapor capturer 2, absorbing a large amount of heat. The high-temperature water vapor is cooled into frost after contacting the water vapor capturer 2 and adheres to the water vapor capturer 2. The liquid nitrogen is converted into nitrogen and returns to the gas liquefaction device 4. The above steps are circulated to realize water capture, thereby improving a series of safety problems caused by oil shortage in the existing method.

[0037] Reference Figure 1 The multiple groups of water vapor capturers 2 arranged at the same time improve the water capture effect. Three perforated plates 11 are evenly arranged on the mounting frame 1. The water vapor capturers 2 are inserted on the perforated plates 11. The perforated plates 11 are used to support and stabilize the water vapor capturers 2, and also enhance the stability of the frame.

[0038] Reference Figure 1An exhaust pipe 21 is provided at one end of the water vapor capturer 2, and a gas collecting tank 3 is provided at the end of the exhaust pipe 21 away from the water vapor capturer 2. Nitrogen enters the gas collecting tank 3 from the exhaust pipe 21, and an outlet pipe 31 is provided on the gas collecting tank 3. The gas liquefaction device 4 is located at the end of the outlet pipe 31 away from the gas collecting tank 3. Nitrogen enters the gas liquefaction device 4 from the gas collecting tank 3 along the outlet pipe 31. The gas liquefaction device 4 is used to convert nitrogen into liquid nitrogen. A liquid outlet pipe 41 is provided on the gas liquefaction device 4. Liquid nitrogen enters the liquid supply manifold 22 through the liquid outlet pipe 41. The outer wall of the liquid outlet pipe 41 is provided with an antifreeze sleeve 411. When in use Liquid nitrogen flows in the liquid outlet pipe 41, and the temperature of the outer wall of the liquid outlet pipe 41 is relatively low. The antifreeze sleeve 411 can reduce the frostbite caused by touching the outer wall of the liquid outlet pipe 41, thereby improving safety. The end of the liquid outlet pipe 41 away from the gas liquefaction device 4 is fixedly connected to the water vapor capturer 2. The gas liquefaction device 4 liquefies the nitrogen and passes it into the water vapor capturer 2. The liquid nitrogen absorbs heat and is converted into nitrogen, which reduces the surface temperature of the water vapor capturer 2 to absorb water vapor, thereby improving the cooling effect. The gas enters the gas liquefaction device 4 from the exhaust pipe 21 again, and will not remain in the water vapor capturer 2, thereby improving the safety of the equipment.

[0039] Reference Figure 1 and Figure 2 The water vapor trap 2 includes a liquid supply header 22 , a plurality of liquid supply pipes 23 , a gas return header 24 and a gas return pipe 25 , and the orifice plates 11 are evenly arranged on the liquid supply pipes 23 . One end of the liquid supply pipe 23 is fixedly connected to the liquid supply manifold 22, and the other end is fixedly connected to the return gas manifold 24. Liquid nitrogen enters the liquid supply pipe 23 from the liquid supply manifold 22 and is converted into nitrogen and enters the return gas manifold 24. The liquid supply pipe 23 includes a plurality of straight pipes 231 and a plurality of curved pipes 232. The return gas manifold 24 is fixedly connected to the return gas pipe 25. Nitrogen enters the return gas pipe 25 from the return gas manifold 24. A valve 251 is provided at one end of the return gas pipe 25 away from the return gas manifold 24. The valve 251 is used to control the switch of the return gas pipe 25. The end of the valve 251 away from the return gas pipe 25 is connected to the exhaust pipe 21. A pressure gauge 252 is provided on the valve 251 near one end of the return gas pipe 25. The pressure gauge 252 can display the pressure in the water vapor capturer 2 in real time. When in use, when the pressure gauge 252 shows a large pressure, it means that more nitrogen is stored in the steam capturer. The user can open the valve 251 in time to discharge the gas from the exhaust pipe 21 to improve the safety of the equipment.

[0040] Reference Figure 1 and Figure 3A defrosting water support plate 12 is provided above the orifice plate 11, and a plurality of first defrosting water pipes 51 are penetrated on the defrosting water support plate 12. The defrosting water support plate 12 firmly supports the first defrosting water pipes 51. A plurality of first water spraying ports 511 are evenly provided on the first defrosting water pipes 51. Each first water spraying port 511 corresponds to a corresponding area. The first water spraying port 511 faces the liquid supply pipe 23. The first defrosting water pipes 51 spray clean water from the first water spraying ports, and the clean water is used to remove the frost attached to the water vapor trap 2, so as to maintain the continuous water vapor capture capability of the water vapor trap 2. In addition, the first defrosting water pipes 51 are evenly distributed between the liquid supply header 22 and the air return header 24, so as to improve the spray cleaning effect.

[0041] Reference Figure 1 and Figure 3 The water supply of the first defrosting water pipe 51 is realized by the defrosting water collecting pipe 51 provided at one end thereof, and the defrosting water collecting pipe 51 is provided with a water inlet pipe 53, and the water inlet pipe 53 distributes water to all the first defrosting water pipes 51 through the defrosting water collecting pipe 51. In addition, in this embodiment, the end of the first defrosting water pipe 51 away from the defrosting water collecting pipe 51 is closed, thereby increasing the water pressure in the pipe, and the length direction of the first defrosting water pipe 51 is consistent with the arrangement direction of the orifice plate 11, thereby ensuring the coverage effect of the spray water defrosting.

[0042] Reference Figure 1 A water receiving pan 6 is provided under the mounting frame 1. When in use, water in the first defrosting water pipe 51 is sprayed onto the liquid supply pipe 23 to flush the frost adsorbed on the liquid supply pipe 23, and the sprayed water and the flushed frost water flow into the water receiving pan 6 for collection; a drain pipe 61 is provided on a side of the water receiving pan 6 away from the mounting frame 1, and a purification box 7 is provided at one end of the drain pipe 61 away from the water receiving pan 6, and the water collected by the water receiving pan 6 enters the purification box 7 through the drain pipe 61.

[0043] Reference Figure 1 The purification box 7 includes a purification device 72, which can purify the water discharged from the water receiving tray 6, and can use well-known filtering and purification materials such as filter cotton; the purification box 7 is connected to the drain pipe 61 above the purification device 72, and the water discharged from the drain pipe 61 can completely pass through the purification device 72, thereby improving the purification effect. A water outlet pipe 71 is provided at the bottom of the purification box 7, and the end of the water outlet pipe 71 away from the purification box 7 is connected to the water inlet pipe 53, and the purified water is transported to the water inlet pipe 53 again, thereby reducing water waste. A water pump 711 is provided on the water outlet pipe 71, and the water pump 711 can more quickly input water from the water outlet pipe 71 to the water inlet pipe 53, thereby improving the efficiency of water recycling.

[0044] The implementation principle of this embodiment is as follows: the gas liquefaction device 4 liquefies nitrogen into liquid nitrogen and then enters the liquid supply header 22 through the liquid outlet pipe 41, and is divided into each liquid supply pipe 23 from the liquid supply header 22. In the process of passing through the liquid supply pipe 23, the liquid nitrogen absorbs heat and is converted into nitrogen, so that the temperature of the outer wall of the liquid supply pipe 23 is reduced, and water vapor is adsorbed onto the outer wall of the liquid supply pipe 23 to become frost. The nitrogen in each liquid supply pipe 23 enters the return gas header 24 along the liquid supply pipe 23, and the nitrogen enters the return gas header 25 from the return gas header 24. The valve 251 is opened, and the nitrogen enters the gas collector from the exhaust pipe 21 Tank 3, nitrogen then enters the gas liquefaction device 4 from the gas collecting tank 3 along the gas outlet pipe 31, and the nitrogen is converted into liquid nitrogen in the gas liquefaction device 4, and the previous steps are repeated again. After the water vapor is captured, water is introduced into the first defrosting water pipe 51, and the water is sprayed onto the liquid supply pipe 23 from the first water spray port 511 on the first defrosting water pipe 51 to clean the liquid supply pipe 23. The defrosting water generated after cleaning enters the purification box 7 from the water receiving tray 6 along the drain pipe 61, and the defrosting water re-enters the first defrosting water pipe 51 along the water outlet pipe 71 after purification, and this step is repeated.

[0045] Example 2

[0046] Reference Figure 4 and Figure 5 The difference between this embodiment and the embodiment 1 is that: the defrosting water support plate 12 is further provided with a plurality of second defrosting water pipes 52, the second defrosting water pipes 52 include a first spray pipe 521 and a second spray pipe 522, one end of the first spray pipe 521 is fixedly connected to the defrosting water collecting pipe 5, the first spray pipe 521 is evenly provided with a plurality of second spray ports 5211, the second spray ports 5211 are evenly distributed along the length direction of the straight pipe 231, the first spray pipe 521 sprays water toward the straight pipe 231, and the second spray pipe 52 2 is located at one end of the first water spray pipe 521 away from the defrosting water collecting pipe 5, and one end of the second water spray pipe 522 away from the first water spray pipe 521 is closed to increase the water pressure in the pipe. A plurality of nozzles 5221 are evenly arranged on the second water spray pipe 522. The second water spray pipe 522 sprays water toward the curved pipe 232 through the nozzles 5221. The length direction of the second water spray pipe 522 is the same as the arrangement direction of the curved pipe 232. The spraying area of ​​the second defrosting water pipe 52 on the liquid supply pipe 23 is increased, thereby improving the cleaning effect on the liquid supply pipe 23.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water vapor capture device for freeze drying, comprising a mounting frame (1) and a plurality of water vapor capturers (2), characterized in that: A plurality of orifice plates (11) are evenly arranged on the mounting frame (1), a water vapor trap (2) is inserted through the orifice plates (11), a cooling medium of the water vapor trap (2) is liquid nitrogen, an exhaust pipe (21) is provided at one end of the water vapor trap (2), a gas collecting tank (3) is provided at the end of the exhaust pipe (21) away from the water vapor trap (2), an outlet pipe (31) is provided on the gas collecting tank (3), a gas liquefaction device (4) is provided at the end of the outlet pipe (31) away from the gas collecting tank (3), and the gas liquefaction device (4) is used to convert nitrogen into liquid Nitrogen, a liquid outlet pipe (41) is provided on the gas liquefaction device (4), one end of the liquid outlet pipe (41) away from the gas liquefaction device (4) is fixedly connected to the water vapor capture device (2), a defrosting water support plate (12) is provided on the orifice plate (11), a plurality of first defrosting water pipes (51) are passed through the defrosting water support plate (12), a defrosting water collecting pipe (5) is provided at one end of the first defrosting water pipe (51), a water inlet pipe (53) is provided on the defrosting water collecting pipe (5), and a plurality of first water spraying ports (511) are evenly arranged on the first defrosting water pipe (51).

2. A freeze-drying water vapor capture device according to claim 1, characterized in that: The water vapor trap (2) comprises a liquid supply header (22), a plurality of liquid supply pipes (23), a gas return header (24) and a gas return pipe (25); one end of the liquid supply pipe (23) is fixedly connected to the liquid supply header (22); one end of the liquid supply pipe (23) is fixedly connected to the gas return header (24); the gas return header (24) is fixedly connected to the gas return pipe (25); a valve (251) is provided at one end of the gas return pipe (25) away from the gas return header (24); one end of the valve (251) away from the gas return pipe (25) is connected to the exhaust pipe (21); and a pressure gauge (252) is provided on one end of the valve (251) close to the gas return pipe (25).

3. A freeze-drying water vapor capture device according to claim 2, characterized in that: The first defrosting water pipes (51) are evenly distributed between the liquid supply header (22) and the air return header (24); one end of the first defrosting water pipes (51) away from the defrosting water header (5) is closed; and the length direction of the first defrosting water pipes (51) is consistent with the arrangement direction of the orifice plates (11).

4. A freeze-drying water vapor capture device according to claim 2, characterized in that: The defrosting water support plate (12) is provided with a plurality of first defrosting water pipes (51) and a plurality of second defrosting water pipes (52); the second defrosting water pipe (52) comprises a first spray pipe (521) and a second spray pipe (522); one end of the first spray pipe (521) is fixedly connected to the defrosting water collecting pipe (5); the first spray pipe (521) is evenly provided with a plurality of second spray ports (5211); the second spray pipe (522) is located between the first spray pipe (521) and the second spray pipe (522). One end of the second water spray pipe (522) is away from the defrosting water collecting pipe (5), and one end of the second water spray pipe (522) is away from the first water spray pipe (521), and is closed; a plurality of spray heads (5221) are evenly arranged on the second water spray pipe (522); the liquid supply pipe (23) comprises a plurality of straight pipes (231) and a plurality of curved pipes (232); the second water spray ports (5211) are evenly distributed along the length direction of the straight pipes (231); and the length direction of the second water spray pipe (522) is the same as the arrangement direction of the curved pipes (232).

5. The freeze-drying water vapor capture device according to claim 1, characterized in that: The outer wall of the liquid outlet pipe (41) is provided with an antifreeze sleeve (411).

6. A freeze-drying water vapor capture device according to claim 1, characterized in that: A water receiving tray (6) is provided below the installation frame (1); a drainage pipe (61) is provided on a side of the water receiving tray (6) away from the installation frame (1); a purification box (7) is provided at one end of the drainage pipe (61) away from the water receiving tray (6); a water outlet pipe (71) is provided at the bottom of the purification box (7); an end of the water outlet pipe (71) away from the purification box (7) is connected to the water inlet pipe (53); and a purification device (72) is provided in the purification box (7).

7. A freeze-drying water vapor capture device according to claim 6, characterized in that: The connection point between the purification box (7) and the drainage pipe (61) is located above the purification device (72).

8. A freeze-drying water vapor capture device according to claim 6, characterized in that: The water outlet pipe (71) is provided with a water pump (711).

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