CN210638375U - Cooling device of silicone oil type overlapping partition plate freeze dryer - Google Patents
Cooling device of silicone oil type overlapping partition plate freeze dryer Download PDFInfo
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- CN210638375U CN210638375U CN201921782821.XU CN201921782821U CN210638375U CN 210638375 U CN210638375 U CN 210638375U CN 201921782821 U CN201921782821 U CN 201921782821U CN 210638375 U CN210638375 U CN 210638375U
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Abstract
The utility model discloses a silicon oil formula overlapping baffle freeze dryer heat sink belongs to freeze dryer heat sink technical field. The cooling device of the silicone oil type overlapping partition plate freeze dryer comprises a pre-cooling unit, a refrigerating unit and a freeze-drying bin, wherein the pre-cooling unit is used for pre-cooling or refrigerating a refrigerating unit, and the refrigerating unit is used for refrigerating the freeze-drying bin. The refrigeration unit comprises a low-pressure compressor, a condenser, a plate heat exchanger II and a plate heat exchanger I which are sequentially communicated through a connecting pipe. The precooling unit comprises a high-pressure compressor, a condenser and a plate heat exchanger II which are sequentially communicated through a connecting pipe. And the second plate heat exchanger, the cold trap and the low-pressure compressor are communicated through a connecting pipe. And a third electromagnetic valve and a second electromagnetic valve are respectively arranged on connecting pipes between the second plate heat exchanger and the first plate heat exchanger and the cold trap. The first plate heat exchanger is connected with the freeze-drying bin through a silicon oil pipe. The utility model adopts the above structure freeze dryer heat sink can solve the problem that freeze dryer refrigeration efficiency is low, and energy consumption is big.
Description
Technical Field
The utility model belongs to the technical field of the freeze dryer heat sink technique and specifically relates to a heat sink of silicon oil formula overlapping baffle freeze dryer is related to.
Background
A freeze dryer is a method of freezing a water-containing substance into a solid state and then sublimating water therein 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 freeze drying bin, materials are placed on the baffles, a silicon oil pipe is fixed on the baffles, and heat exchange is carried out between heat dissipation medium silicon oil in the silicon oil pipe and the freeze drying bin, so that each baffle can be uniformly cooled. The freeze dryer is also provided with a cold trap, and the cold trap absorbs water vapor in the freeze drying bin by physical adsorption through refrigeration. The existing freeze dryer cold trap and freeze drying bin are respectively cooled by respective cooling devices, and energy consumption is large. The freeze-drying bin adopts a compressor to cool, and the refrigeration efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a silicon oil formula overlapping baffle freeze dryer heat sink solves the freeze dryer refrigeration inefficiency, the big problem of energy consumption.
In order to achieve the purpose, the utility model provides a silicon oil type overlapping baffle freeze dryer heat sink, which comprises a precooling unit, a refrigerating unit and a freeze-drying bin, wherein the precooling unit is used for precooling or refrigerating the refrigerating unit, and the refrigerating unit is used for refrigerating the freeze-drying bin;
the refrigeration unit comprises a low-pressure compressor, a condenser, a plate heat exchanger II and a plate heat exchanger I, the low-pressure compressor is communicated with the condenser through a connecting pipe, an oil-gas separator is arranged on the connecting pipe between the low-pressure compressor and the condenser, the condenser is communicated with the plate heat exchanger II through the connecting pipe II, the plate heat exchanger II is communicated with the plate heat exchanger I through a connecting pipe IV, a solenoid valve III and an expansion valve III are arranged on the connecting pipe IV, the plate heat exchanger I is communicated with the low-pressure compressor through the connecting pipe, and a gas separator is arranged on the connecting pipe between the plate heat exchanger I and the low-pressure; the first plate heat exchanger is in circulating connection with the freeze-drying bin through a silicon oil pipe, a circulating pump is arranged on the silicon oil pipe between the first plate heat exchanger and the freeze-drying bin, and heat exchange is carried out between silicon oil in the silicon oil pipe and a refrigerant in the refrigeration unit in the first plate heat exchanger;
the second plate heat exchanger is communicated with the cold trap through a fifth connecting pipe, the fifth connecting pipe is provided with a second electromagnetic valve and a second expansion valve, the cold trap is communicated with the low-pressure compressor through the second connecting pipe, and a gas separator is arranged on the connecting pipe between the cold trap and the low-pressure compressor.
Furthermore, the precooling unit comprises a high-pressure compressor, a condenser and a plate heat exchanger II, the high-pressure compressor is communicated with the condenser through a connecting pipe, the condenser is communicated with the plate heat exchanger II through a connecting pipe I, the plate heat exchanger II is communicated with the high-pressure compressor through a connecting pipe III, a solenoid valve I and an expansion valve I are arranged on the connecting pipe I, and heat exchange is carried out between a refrigerant in the refrigerating unit and the refrigerant in the precooling unit in the plate heat exchanger II.
Furthermore, a second filter and a liquid storage tank are arranged on the first connecting pipe, the second filter is located between the liquid storage tank and the condenser, and the liquid storage tank is located at the upstream of the first electromagnetic valve.
Furthermore, a first filter is arranged on the second connecting pipe.
The utility model discloses an opening and closing of two solenoid valves and three solenoid valves realize the independent cooling or the simultaneous cooling of freeze-drying storehouse and cold-trap, adopt a compressor and a condenser just can realize the temperature drop of the two, reduced energy consumption. During refrigeration, the high-pressure compressor is started firstly, the refrigerant in the refrigeration unit is precooled by the refrigerant in the precooling unit in the plate type heat exchanger II, then the high-pressure compressor and the low-pressure compressor run simultaneously, the refrigerant in the precooling unit further refrigerates the refrigerant in the refrigeration unit, then the refrigerant in the refrigeration unit exchanges heat with silicon oil in the plate type heat exchanger I, and then exchanges heat with the freeze-drying bin through the silicon oil, so that the cooling efficiency is improved.
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 cooling device of a silicone oil type overlapping partition plate 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 fourth connecting pipe; 5. connecting a pipe V; 6. A silicon oil pipe.
Detailed Description
Examples
Fig. 1 is a schematic structural diagram of an embodiment of a cooling device of a silicone oil type overlapping partition plate freeze dryer of the present invention. As shown in the figure, the cooling device of the silicone oil type overlapping partition plate freeze dryer comprises a pre-cooling unit, a refrigerating unit and a freeze-drying bin, wherein the pre-cooling unit pre-cools a refrigerating unit, and the refrigerating unit refrigerates the freeze-drying bin. The precooling unit comprises a high-pressure compressor, a condenser and a plate heat exchanger II. The high-pressure compressor is communicated with the condenser through a connecting pipe, the condenser is communicated with the second plate heat exchanger through a first connecting pipe 1, and the second plate heat exchanger is communicated with the high-pressure compressor through a third connecting pipe 3. The first connecting pipe 1 is provided with a first electromagnetic valve, a first expansion valve, a second filter and a liquid storage tank, the second filter is positioned between the liquid storage tank and the condenser, and the liquid storage tank is positioned at the upstream of the first electromagnetic valve. The first electromagnetic valve is used for controlling the opening and closing of the first connecting pipe 1, and the first expansion valve is used for adjusting the pressure of the liquid refrigerant in the first connecting pipe 1.
The refrigeration unit comprises a low-pressure compressor, a condenser, a plate type heat exchanger II and a plate type heat exchanger I. The low-pressure compressor is communicated with the condenser through the connecting pipe, the oil-gas separator is arranged on the connecting pipe, liquid engine oil mixed in gas is collected by the oil-gas separator and then sent into the low-pressure compressor for recycling, and the oil consumption of the air compressor is reduced. The oil-gas separator is of an existing structure, a commercially available product can meet the requirement, and the structure of the oil-gas separator is not the key point of the application and is not described in detail herein. The condenser is communicated with the second plate heat exchanger through a second connecting pipe 2, a first filter is arranged on the second connecting pipe 2, and the first filter has a filtering effect on liquid refrigerants. The second plate heat exchanger is communicated with the first plate heat exchanger through a fourth connecting pipe 4, a third electromagnetic valve and a third expansion valve are arranged on the fourth connecting pipe 4, the third electromagnetic valve is used for controlling the opening and closing of the fourth connecting pipe 4, and the third expansion valve is used for adjusting the pressure of liquid refrigerants in the fourth connecting pipe 4. And the first plate heat exchanger is communicated with the low-pressure compressor through a connecting pipe, and a gas separator is arranged on the connecting pipe. The gas separator is used for separating liquid refrigerant entrained in the gaseous refrigerant and preventing the liquid refrigerant from entering the compressor.
The first plate heat exchanger is circularly connected with the freeze-drying bin through a silicon oil pipe 6, and the silicon oil pipe 6 is provided with a circulating pump. The silicone oil in the silicone oil pipe exchanges heat with the refrigerant in the plate heat exchanger I, the silicone oil pipe 6 is uniformly distributed on the partition plate of the freeze-drying bin, the silicone oil pipe 6 is filled with the silicone oil, and the silicone oil is used as a heat transfer medium to exchange heat with the material on the partition plate, so that the temperature of the material is uniformly reduced. The circulating pump provides power for the circulation of the silicone oil.
The low-pressure compressor and the high-pressure compressor are respectively communicated with the plate heat exchanger II through the connecting pipe II 2 and the connecting pipe I1, namely, one of two pipelines in the plate heat exchanger II is filled with a refrigerant of the pre-cooling unit, the other pipeline is filled with a refrigerant of the refrigerating unit, the refrigerant of the pre-cooling unit pre-cools or further refrigerates the refrigerant of the refrigerating unit, and refrigerating efficiency is improved.
The second plate heat exchanger is communicated with the cold trap through a fifth connecting pipe 5, and a second electromagnetic valve and a second expansion valve are arranged on the fifth connecting pipe 5. The electromagnetic valve is used for controlling the opening and closing of the connecting pipe five 5, and the expansion valve is used for adjusting the pressure of the liquid refrigerant on the connecting pipe five 5. The cold trap is communicated with the low-pressure compressor through a connecting pipe, and a gas separator is arranged on the connecting pipe. The cold trap is connected with the freeze-drying bin through a connecting pipeline and is used for absorbing sublimed water vapor in the freeze-drying bin. The cold trap is cooled under the action of the refrigerant, and the water vapor from the freeze drying bin is condensed into frost on the wall of the cold trap to capture the water vapor.
Through the switching of the second electromagnetic valve and the third electromagnetic valve, the independent refrigeration or the simultaneous refrigeration of the cold trap and the freeze-drying bin can be realized.
The refrigerant in the pre-cooling unit is different from the refrigerant in the refrigeration unit, and the refrigerant in the pre-cooling unit has a higher boiling point.
The cooling device of the utility model has three circulation states, during the precooling, only start the high-pressure compressor, the gaseous state refrigerant after the high-pressure compressor will compress is sent into the condenser, the condenser changes the gaseous state refrigerant into the liquid state refrigerant, then flow into the second plate heat exchanger through the first connecting pipe 1, the refrigerant of the refrigerating unit and the refrigerant of the precooling unit carry out the heat exchange in the second plate heat exchanger, carry out the precooling to the refrigerant of the refrigerating unit, the liquid state refrigerant heat absorption of the precooling unit becomes the gaseous state refrigerant, then form a circulation through entering the high-pressure compressor through the third connecting pipe 3; and circulating in this way.
When refrigerating the freeze-drying chamber, opening the electromagnetic valve III, starting the low-pressure compressor, enabling the low-pressure compressor and the high-pressure compressor to work simultaneously, sending the compressed gaseous refrigerant into the condenser by the low-pressure compressor, the condenser converts the gaseous refrigerant into liquid refrigerant, and then the liquid refrigerant flows into the second plate heat exchanger through the second connecting pipe 2, the refrigerant of the pre-cooling unit in the plate heat exchanger II further refrigerates the refrigerant of the refrigerating unit, and then the liquid refrigerant of the refrigerating unit and the silicon oil in the silicon oil pipe 6 exchange heat in the plate heat exchanger I through the electromagnetic valve III and the expansion valve III through the connecting pipe IV 4, the silicon oil enters the freeze-drying bin to refrigerate the material, the mixed refrigerant after heat exchange enters the gas separator to be separated, and then the mixed refrigerant is sent into the low-pressure compressor to form a cycle, and the cycle is carried out according to the cycle.
When the cold trap is refrigerated, the second electromagnetic valve is opened, the compressed gaseous refrigerant is sent into the condenser by the low-pressure compressor, the gaseous refrigerant is converted into the liquid refrigerant by the condenser, then the liquid refrigerant flows into the second plate heat exchanger through the second connecting pipe 2, the liquid refrigerant enters the cold trap through the second electromagnetic valve and the second expansion valve, the cold trap is refrigerated, and the refrigerant after heat exchange enters the low-pressure compressor through the connecting pipe and the gas separator to form a cycle and is circulated accordingly.
The commercial products of the solenoid valve, the expansion valve and the filter can meet the use requirements, the structure of the solenoid valve, the expansion valve and the filter is not the key point of the application, and the structure of the solenoid valve, the expansion valve and the filter is not repeated.
The independent cooling or the simultaneous cooling of the freeze-drying bin and the cold trap is realized by opening and closing the second electromagnetic valve and the third electromagnetic valve, the temperature of the freeze-drying bin and the cold trap can be reduced by adopting one compressor and one condenser, and the energy consumption is reduced. During refrigeration, the high-pressure compressor is started firstly, the refrigerant in the refrigeration unit is precooled by the refrigerant in the precooling unit in the plate type heat exchanger II, then the high-pressure compressor and the low-pressure compressor run simultaneously, the refrigerant in the precooling unit further refrigerates the refrigerant in the refrigeration unit, then the refrigerant in the refrigeration unit exchanges heat with silicon oil in the plate type heat exchanger I, and then exchanges heat with the freeze-drying bin through the silicon oil, so that the cooling efficiency is improved.
Therefore, the utility model adopts the above structure silicone oil formula overlapping baffle freeze dryer heat sink can solve the problem that the freeze dryer refrigeration efficiency is low, and energy consumption is big.
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 (4)
1. The utility model provides a silicon oil formula overlapping baffle freeze dryer heat sink which characterized in that: the refrigeration system comprises a pre-cooling unit, a refrigeration unit and a freeze-drying bin, wherein the pre-cooling unit is used for pre-cooling or refrigerating a refrigeration unit, and the refrigeration unit is used for refrigerating the freeze-drying bin;
the refrigeration unit comprises a low-pressure compressor, a condenser, a plate heat exchanger II and a plate heat exchanger I, the low-pressure compressor is communicated with the condenser through a connecting pipe, an oil-gas separator is arranged on the connecting pipe between the low-pressure compressor and the condenser, the condenser is communicated with the plate heat exchanger II through a connecting pipe II (2), the plate heat exchanger II is communicated with the plate heat exchanger I through a connecting pipe IV (4), a solenoid valve III and an expansion valve III are arranged on the connecting pipe IV (4), the plate heat exchanger I is communicated with the low-pressure compressor through the connecting pipe, and a gas separator is arranged on the connecting pipe between the plate heat exchanger I and the low-pressure compressor; the first plate heat exchanger is in circulating connection with the freeze-drying bin through a silicon oil pipe (6), a circulating pump is arranged on the silicon oil pipe (6) between the first plate heat exchanger and the freeze-drying bin, and heat exchange is carried out between silicon oil in the silicon oil pipe (6) and a refrigerant in the refrigeration unit in the first plate heat exchanger;
the second plate heat exchanger is communicated with the cold trap through a fifth connecting pipe (5), the fifth connecting pipe (5) is provided with a second electromagnetic valve and a second expansion valve, the cold trap is communicated with the low-pressure compressor through a connecting pipe, and a gas separator is arranged on the connecting pipe between the cold trap and the low-pressure compressor.
2. The cooling device of the silicone oil type overlapping partition plate freeze dryer according to claim 1, characterized in that: the precooling unit comprises a high-pressure compressor, a condenser and a plate heat exchanger II, the high-pressure compressor is communicated with the condenser through a connecting pipe, the condenser is communicated with the plate heat exchanger II through a connecting pipe I (1), the plate heat exchanger II is communicated with the high-pressure compressor through a connecting pipe III (3), the connecting pipe I (1) is provided with a solenoid valve I and an expansion valve I, and a refrigerant in the refrigerating unit and a refrigerant in the precooling unit exchange heat in the plate heat exchanger II.
3. The cooling device of the silicone oil type overlapping partition plate freeze dryer according to claim 2, characterized in that: and the connecting pipe I (1) is provided with a second filter and a liquid storage tank, the second filter is positioned between the liquid storage tank and the condenser, and the liquid storage tank is positioned at the upstream of the first electromagnetic valve.
4. The cooling device of the silicone oil type overlapping partition plate freeze dryer according to claim 1, characterized in that: and a first filter is arranged on the second connecting pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921782821.XU CN210638375U (en) | 2019-10-23 | 2019-10-23 | Cooling device of silicone oil type overlapping partition plate freeze dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921782821.XU CN210638375U (en) | 2019-10-23 | 2019-10-23 | Cooling device of silicone oil type overlapping partition plate freeze dryer |
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| Publication Number | Publication Date |
|---|---|
| CN210638375U true CN210638375U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921782821.XU Active CN210638375U (en) | 2019-10-23 | 2019-10-23 | Cooling device of silicone oil type overlapping partition plate freeze dryer |
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| CN (1) | CN210638375U (en) |
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- 2019-10-23 CN CN201921782821.XU patent/CN210638375U/en active Active
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