CN211177646U - Refrigerating device of freeze dryer cold water system - Google Patents
Refrigerating device of freeze dryer cold water system Download PDFInfo
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- CN211177646U CN211177646U CN201922304451.5U CN201922304451U CN211177646U CN 211177646 U CN211177646 U CN 211177646U CN 201922304451 U CN201922304451 U CN 201922304451U CN 211177646 U CN211177646 U CN 211177646U
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Abstract
The utility model discloses a freeze dryer cooling water system refrigerating plant belongs to freeze dryer refrigerating plant technical field. The refrigerating device comprises a compressor, the compressor is communicated with the water-cooled condenser through a connecting pipe, the water-cooled condenser is respectively connected with the plate changing and cold trap through a third branch pipe and a fourth branch pipe, a second electromagnetic valve is arranged on the third branch pipe, a third electromagnetic valve is arranged on the fourth branch pipe, the plate changing is connected with the air distributor through a sixth connecting pipe, the cold trap is connected with the air distributor through a seventh connecting pipe, and the air distributor is communicated with the compressor through an eighth connecting pipe. The water-cooled condenser is communicated with the cooling tower in a circulating way through a connecting pipe, and the plate exchanger is communicated with the drying chamber in a circulating way through a silicon oil pipe. A supercooling unit is arranged between the water-cooled condenser and the plate exchanger and cold trap. The utility model adopts the above structure's freeze dryer cold water system refrigerating plant, it is poor to solve current single compressor freeze dryer refrigeration effect, and cold trap and baffle are difficult to reduce the problem to the lower temperature, and the cold trap temperature can reduce to-75 ℃, and the baffle temperature can reduce to-55 ℃.
Description
Technical Field
The utility model belongs to the technical field of the freeze dryer refrigerating plant technique and specifically relates to a freeze dryer cooling water system refrigerating plant is related to.
Background
A freeze dryer is a method of freezing a water-containing substance into a solid state and then sublimating water from the solid state into a gaseous state to remove water and preserve the substance. The freeze dryer is dried at low temperature, does not deform protein, but can lose biological activity of microorganisms and the like, and is particularly suitable for bioactive products, biochemical products, genetic engineering products, blood products and the like with poor thermal stability.
The baffle type freeze dryer is characterized in that a plurality of baffles are placed in a drying chamber, materials are placed on the baffles, silicon oil pipes are fixed on the baffles, and heat exchange is carried out between heat dissipation medium silicon oil in the silicon oil pipes and the baffles, so that the baffles can be uniformly cooled. The freeze dryer is also provided with a cold trap, and the cold trap absorbs water vapor in the drying chamber by physical adsorption through refrigeration. The cold trap and the drying chamber of the existing freeze dryer share one compressor and one condenser, so that the refrigeration effect is poor, and the partition plate and the cold trap are difficult to reduce to lower temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a freeze dryer cooling water system refrigerating plant, it is poor to solve current single compressor freeze dryer refrigeration effect, and cold trap and baffle are difficult to reduce the problem to the lower temperature.
In order to achieve the purpose, the utility model provides a refrigerating device of a freeze dryer cold water system, which comprises a compressor, wherein the compressor is communicated with a water-cooled condenser through a connecting pipe, the water-cooled condenser is respectively connected with a plate exchange and a cold trap through a branch pipe three and a branch pipe four, the branch pipe three is provided with a solenoid valve two, the branch pipe four is provided with a solenoid valve three, the plate exchange is connected with a gas branch through a connecting pipe six, the cold trap is connected with the gas branch through a connecting pipe seven, and the gas branch is communicated with the compressor through a connecting pipe eight;
the water-cooled condenser is circularly communicated with the cooling tower through a connecting pipe, a circulating pump is arranged on the connecting pipe between the water-cooled condenser and the cooling tower, and cooling water in the cooling tower and a refrigerant entering the water-cooled condenser exchange heat in the water-cooled condenser; the plate exchanger is circularly communicated with the drying chamber through a silicon oil pipe, a circulating pump is arranged on the silicon oil pipe, and the silicon oil in the silicon oil pipe exchanges heat with the refrigerant entering the plate exchanger through the branch pipe III in the plate exchanger;
a supercooling unit is arranged between the water-cooled condenser and the plate heat exchanger and cold trap, the supercooling unit comprises an intercooling heat exchanger, the water-cooled condenser is communicated with a pipeline in the intercooling heat exchanger through a connecting pipe III and a branch pipe I, and then is communicated with a branch pipe III and a branch pipe IV through a connecting pipe V; the water-cooled condenser is communicated with the other pipeline in the intercooling heat exchanger through a third connecting pipe and a second branch pipe and then returns to the compressor through a fourth connecting pipe; a filter, a solenoid valve I, a sight glass and an expansion valve are sequentially arranged on the branch pipe I from the connecting pipe III to the intercooling heat exchanger, and a pipeline communicated with the branch pipe I in the intercooling heat exchanger is used for refrigerating a pipeline communicated with the branch pipe II; the pipe diameter of the first branch pipe is smaller than that of the second branch pipe.
Preferably, the compressor is a bipolar piston compressor.
Preferably, a drying and filtering barrel is arranged on the connecting pipe eighth.
Preferably, an oil content is arranged between the compressor and the water-cooled condenser, the compressor is communicated with the oil content through a first connecting pipe, the oil content is communicated with the water-cooled condenser through a second connecting pipe, and the oil separated from the oil content is sent back to the compressor through the second connecting pipe.
Preferably, valves are arranged on the second connecting pipe and the third connecting pipe, and a filter is further arranged on the third connecting pipe; and the third branch pipe and the fourth branch pipe are respectively provided with an expansion valve, and the third branch pipe is also provided with a sight glass.
A freeze dryer cooling water system refrigerating plant, only flow in the compressor has a cryogen, through setting up the subcooling unit between water-cooled condenser and cold-trap, board trade, further refrigeration is carried out to the cryogen that carries out cold-trap and board and trade, has improved the refrigeration effect of freeze dryer to cold-trap and drying chamber. The cold trap temperature can be reduced to-75 ℃ and the temperature of the partition plate can be reduced to-55 ℃.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a refrigeration device of a cold water system of a freeze dryer of the present invention.
Reference numerals
1. A first connecting pipe; 2. a second connecting pipe; 3. a third connecting pipe; 4. a first branch pipe; 5. a second branch pipe; 6. a fourth connecting pipe; 7. a filter; 8. a first electromagnetic valve; 9. a sight glass; 10. an expansion valve; 11. connecting a pipe V; 12. a branch pipe III; 13. a fourth branch pipe; 14. a silicon oil pipe; 15. a sixth connecting pipe; 16. a seventh connecting pipe; 17. a eighth connecting pipe; 18. a circulation pump; 19. a second electromagnetic valve; 20. and a third electromagnetic valve.
Detailed Description
Examples
Fig. 1 is a schematic structural diagram of an embodiment of a refrigeration device of a cold water system of a freeze dryer of the present invention. As shown in the figure, the refrigeration device of the freeze dryer cold water system comprises a compressor, wherein the compressor is a bipolar piston compressor and is of an existing structure. Only one refrigerant flows in the compressor. The compressor is communicated with the water-cooled condenser through a connecting pipe, and the compressed gaseous refrigerant is sent into the water-cooled condenser by the compressor. Oil content is arranged between the compressor and the water-cooled condenser, the compressor is communicated with the oil content through a first connecting pipe 1, the oil content is communicated with the water-cooled condenser through a second connecting pipe 2, and the oil separated from the oil content is sent back into the compressor through the connecting pipe. The oil separator is an existing structure, collects liquid gasoline mixed in gas and then sends the liquid gasoline into a compressor for recycling, and oil consumption of the compressor is reduced.
The water-cooled condenser is communicated with the cooling tower in a circulating way through a connecting pipe, and a circulating pump 18 is arranged on the connecting pipe between the water-cooled condenser and the cooling tower. The cooling water in the cooling tower exchanges heat with the gaseous refrigerant entering the water-cooled condenser from the compressor in the water-cooled condenser to become liquid refrigerant, and the cooling water cools the refrigerant entering the water-cooled condenser.
The water-cooled condenser is connected with the plate through a branch pipe III 12 in a replacement mode, and the plate heat exchanger is of an existing structure. The plate exchanger is communicated with the drying chamber in a circulating mode through a silicon oil pipe 14, a circulating pump 18 is arranged on the silicon oil pipe 14, and the silicon oil in the silicon oil pipe 14 exchanges heat with the liquid refrigerant entering the plate exchanger through the branch pipe III 12 in the plate exchanger. One of the two channels in the plate exchanger is communicated with the branch pipe III 12, the other channel is communicated with the silicon oil pipe 14, a liquid refrigerant flows in the channel communicated with the branch pipe III 12, the liquid refrigerant exchanges heat with silicon oil flowing in the other channel, namely the refrigerant refrigerates the silicon oil, and the refrigerated silicon oil enters the drying chamber to cool the drying chamber. The silicon oil pipes 14 are uniformly distributed on the partition plate of the drying chamber, silicon oil is filled in the silicon oil pipes 14, and the silicon oil is used as a heat transfer medium to exchange heat with materials on the partition plate, so that the temperature of the materials is uniformly reduced. The circulation pump 18 provides power for the circulation of the silicone oil.
The water-cooled condenser is connected with the cold trap through a branch pipe four 13, liquid refrigerant after heat exchange in the water-cooled condenser flows in the branch pipe four 13, and the branch pipe four 13 is distributed in the cold trap to exchange heat with air in the cold trap to refrigerate the cold trap. The branch pipe III 12 is provided with a solenoid valve II 19, the branch pipe IV 13 is provided with a solenoid valve III 20, and cold energy is distributed between the cold trap and the drying chamber by controlling the opening and closing of the solenoid valve II 19 and the solenoid valve III 20. The plate exchanger is connected with the air branch through a connecting pipe six 15, and the cold trap is connected with the air branch through a connecting pipe seven 16. The liquid refrigerant after heat exchange in the plate exchanger and the cold trap is changed into gaseous refrigerant, and then enters the gas separator through a connecting pipe six 15 and a connecting pipe seven 16. The gas separator is a gas separator with an existing structure, and the gas separator is used for separating liquid refrigerants mixed in gaseous refrigerants and preventing the liquid refrigerants from entering a compressor. The gas separator is communicated with the compressor through a connecting pipe eight 17, and gas refrigerant is sent into the compressor to complete a cycle. And a drying and filtering barrel is arranged on the connecting pipe eight 17 and is used for drying and filtering the gaseous refrigerant.
A supercooling unit is arranged between the water-cooled condenser and the plate heat exchanger and cold trap and used for supercooling a liquid refrigerant from the water-cooled condenser, so that the temperature of the refrigerant is further reduced, and the refrigeration effect of the refrigerant is improved. The supercooling unit comprises an intercooling heat exchanger, the water-cooled condenser is communicated with one pipeline in the intercooling heat exchanger through a connecting pipe III 3 and a branch pipe I4, and the water-cooled condenser is communicated with the other pipeline in the intercooling heat exchanger through a connecting pipe III 3 and a branch pipe II 5. The intercooling heat exchanger is a plate heat exchanger and has an existing structure, two heat exchange channels are arranged in the intercooling heat exchanger, one channel is communicated with the first branch pipe 4 and enters the upper part of the intercooling heat exchanger to flow out; the other channel is communicated with the second branch pipe 5 and flows out from the upper part of the middle cooling heat exchanger to the lower part. And a pipeline in the intercooling heat exchanger, which is communicated with the branch pipe II 5, is communicated with the branch pipe III 12 and the branch pipe IV 13 through a connecting pipe V11, and a pipeline in the intercooling heat exchanger, which is communicated with the branch pipe I4, sends the heat-exchanged refrigerant into the compressor through a connecting pipe IV 6.
The pipe diameter of the branch pipe I4 is smaller than that of the branch pipe II 5, so that most of the refrigerant exchanges heat with a subsequent cold trap and a subsequent drying chamber through the intercooling heat exchanger, and a small part of the refrigerant enters the branch pipe I4. The branch pipe I4 is sequentially provided with a filter 7, a solenoid valve I8, a sight glass 9 and an expansion valve 10 from the connecting pipe III 3 to the intercooling heat exchanger, and the liquid refrigerant is throttled by the expansion valve 10 to become mist refrigerant with lower temperature. The lower-temperature mist-shaped refrigerant flowing into the intercooling heat exchanger through the branch pipe I4 further refrigerates the liquid refrigerant flowing into the intercooling heat exchanger through the branch pipe II 5, and the temperature of the liquid refrigerant entering the cold trap and the plate exchanger is further reduced. The atomized refrigerant after heat exchange in the intercooling heat exchanger is changed into gaseous refrigerant and returns to the compressor through the connecting pipe IV 6. The filter 7, the first electromagnetic valve 8, the sight glass 9 and the expansion valve 10 are all of the existing structure.
The second connecting pipe 2 and the third connecting pipe 3 are both provided with valves, and the third connecting pipe 3 is also provided with a filter 7. The three branch pipes 12 and the four branch pipes 13 are provided with expansion valves 10, and the three branch pipes 12 are also provided with sight glasses 9.
Therefore, the utility model adopts the above structure the freeze dryer cooling water system refrigerating plant, can solve the poor problem of current single compressor freeze dryer refrigeration effect, the cold trap temperature can reduce to-75 ℃, the baffle temperature can reduce to-55 ℃.
The above are specific embodiments of the present invention, but the scope of protection of the present invention should not be limited thereto. Any changes or substitutions which can be easily conceived by those skilled in the art within the technical scope of the present invention are covered by the protection scope of the present invention, and therefore, the protection scope of the present invention is subject to the protection scope defined by the claims.
Claims (5)
1. The utility model provides a freeze dryer cooling water system refrigerating plant which characterized in that: the compressor is communicated with the water-cooled condenser through a connecting pipe, the water-cooled condenser is respectively connected with the plate exchanger and the cold trap through a third branch pipe and a fourth branch pipe, the third branch pipe is provided with a second electromagnetic valve, the fourth branch pipe is provided with a third electromagnetic valve, the plate exchanger is connected with the air distributor through a sixth connecting pipe, the cold trap is connected with the air distributor through a seventh connecting pipe, and the air distributor is communicated with the compressor through an eighth connecting pipe;
the water-cooled condenser is circularly communicated with the cooling tower through a connecting pipe, a circulating pump is arranged on the connecting pipe between the water-cooled condenser and the cooling tower, and cooling water in the cooling tower and a refrigerant entering the water-cooled condenser exchange heat in the water-cooled condenser; the plate exchanger is circularly communicated with the drying chamber through a silicon oil pipe, a circulating pump is arranged on the silicon oil pipe, and the silicon oil in the silicon oil pipe exchanges heat with the refrigerant entering the plate exchanger through the branch pipe III in the plate exchanger;
a supercooling unit is arranged between the water-cooled condenser and the plate heat exchanger and cold trap, the supercooling unit comprises an intercooling heat exchanger, the water-cooled condenser is communicated with a pipeline in the intercooling heat exchanger through a connecting pipe III and a branch pipe I, and then is communicated with a branch pipe III and a branch pipe IV through a connecting pipe V; the water-cooled condenser is communicated with the other pipeline in the intercooling heat exchanger through a third connecting pipe and a second branch pipe and then returns to the compressor through a fourth connecting pipe; a filter, a solenoid valve I, a sight glass and an expansion valve are sequentially arranged on the branch pipe I from the connecting pipe III to the intercooling heat exchanger, and a pipeline communicated with the branch pipe I in the intercooling heat exchanger is used for refrigerating a pipeline communicated with the branch pipe II; the pipe diameter of the first branch pipe is smaller than that of the second branch pipe.
2. The refrigeration device of claim 1, wherein: the compressor is a bipolar piston compressor.
3. The refrigeration device of claim 1, wherein: and a drying filter vat is arranged on the eighth connecting pipe.
4. The refrigeration device of claim 1, wherein: be provided with the oil content between compressor and the water cooled condenser, the compressor passes through connecting pipe one and oil content intercommunication, and the oil content passes through connecting pipe two and water cooled condenser intercommunication, and the oil of separation passes through the connecting pipe in the oil content and sends back in the compressor.
5. The refrigeration device of claim 4, wherein: valves are arranged on the second connecting pipe and the third connecting pipe, and a filter is arranged on the third connecting pipe; and the third branch pipe and the fourth branch pipe are respectively provided with an expansion valve, and the third branch pipe is also provided with a sight glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922304451.5U CN211177646U (en) | 2019-12-20 | 2019-12-20 | Refrigerating device of freeze dryer cold water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922304451.5U CN211177646U (en) | 2019-12-20 | 2019-12-20 | Refrigerating device of freeze dryer cold water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211177646U true CN211177646U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922304451.5U Active CN211177646U (en) | 2019-12-20 | 2019-12-20 | Refrigerating device of freeze dryer cold water system |
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| Country | Link |
|---|---|
| CN (1) | CN211177646U (en) |
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