CN211146955U - Self-overlapping type ultralow-temperature refrigerating device - Google Patents
Self-overlapping type ultralow-temperature refrigerating device Download PDFInfo
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- CN211146955U CN211146955U CN201922319736.6U CN201922319736U CN211146955U CN 211146955 U CN211146955 U CN 211146955U CN 201922319736 U CN201922319736 U CN 201922319736U CN 211146955 U CN211146955 U CN 211146955U
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Abstract
The utility model discloses a from overlapping formula ultra-low temperature refrigerating plant belongs to refrigerating plant technical field. The refrigerating device comprises a compressor, the compressor is connected with the condenser through a first connecting pipe, the condenser is connected with the top of the gas-liquid separator through a connecting pipe, the top of the gas-liquid separator is connected with the evaporator through a fourth connecting pipe, the bottom of the gas-liquid separator is connected with the evaporator through a fifth connecting pipe, and the evaporator is connected with the compressor through a sixth connecting pipe. The fourth connecting pipe is a stepped pipe and comprises a first pipe section, a second pipe section and a third pipe section, the pipe diameters of the first pipe section, the second pipe section and the third pipe section are sequentially reduced, and the tail end of the third pipe section and the tail end of the fifth connecting pipe are communicated with one end of the sixth connecting pipe in the evaporator. The refrigerant in the compressor is a mixture of three refrigerants having different boiling points. The utility model adopts the above structure from overlapping formula ultra-low temperature refrigerating plant can solve the problem that current refrigeration plant hardly reaches the lower temperature, and the terminal temperature of evaporimeter can reduce to-100 ℃, has simple structure's advantage.
Description
Technical Field
The utility model belongs to the technical field of refrigerating plant technique and specifically relates to a from overlapping formula ultra-low temperature 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 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 carries out refrigeration through a compressor, and the cold trap is difficult to be reduced to a lower temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a from overlapping formula ultra-low temperature refrigerating plant solves the problem that current refrigeration plant hardly reaches the lower temperature.
In order to achieve the purpose, the utility model provides a self-overlapping ultra-low temperature refrigerating device, which comprises a compressor, wherein the compressor is connected with a condenser through a first connecting pipe, the condenser is connected with the top of a gas-liquid separator through a connecting pipe, the top of the gas-liquid separator is connected with an evaporator through a fourth connecting pipe, the bottom of the gas-liquid separator is connected with the evaporator through a fifth connecting pipe, the fifth connecting pipe is a capillary pipe, and the evaporator is connected with the compressor through a sixth connecting pipe to form a circulation loop;
the connecting pipe IV is a stepped pipe and comprises a pipe section I, a pipe section II and a pipe section III, the pipe diameters of the pipe section I, the pipe section II and the pipe section III are sequentially reduced, the pipe section I is communicated with the pipe section III through the pipe section II, the pipe section II and the pipe section III are capillary tubes, and the tail end of the pipe section III and the tail end of the connecting pipe V are communicated with one end of the connecting pipe VI in the evaporator;
the refrigerant in the compressor is a mixture of three refrigerants having different boiling points.
Preferably, the first connecting pipe between the compressor and the condenser is provided with oil.
Preferably, a filter is arranged between the condenser and the gas-liquid separator, the condenser is connected with the filter through a second connecting pipe, and the filter is connected with the gas-liquid separator through a third connecting pipe.
Preferably, the three refrigerants are R600a, R23 and R14, respectively.
Preferably, the inner diameter of the first pipe section is 6mm, the inner diameter of the second pipe section is 4mm, and the inner diameter of the third pipe section is 1 mm.
Preferably, the inner diameter of the connecting pipe five is 1 mm.
Preferably, the gas-liquid separator comprises a shell, a cover plate is arranged above the shell, a sealing ring is arranged at the top of the shell and positioned between the shell and the cover plate, an air inlet pipe and an air outlet pipe are arranged on the cover plate, an air outlet of the air inlet pipe is positioned at the lower part of the shell, an air inlet of the air outlet pipe is positioned at the top of the shell, and a liquid outlet pipe is arranged at the bottom of the shell; the air inlet pipe is communicated with a connecting pipe between the condenser and the gas-liquid separator, the air outlet pipe is communicated with the fourth connecting pipe, and the liquid outlet pipe is communicated with the fifth connecting pipe.
Preferably, the lower part of the air inlet pipe is provided with a folded edge, and the bottom of the folded edge is provided with an air outlet facing the inner wall of the shell.
From overlapping formula ultra-low temperature refrigerating plant, can solve the problem that current refrigeration plant hardly reaches the lower temperature, the terminal temperature of evaporimeter can reduce to-100 ℃, has simple structure's advantage.
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 self-cascade ultralow temperature refrigerating device according to the present invention;
fig. 2 is a schematic diagram of the internal pipeline structure of the evaporator of the embodiment of the self-cascade ultralow temperature refrigerating device of the present invention;
fig. 3 is a schematic structural view of a gas-liquid separator according to an embodiment of the self-cascade ultra-low temperature refrigerating apparatus 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 sixth connecting pipe; 7. a first pipe section; 8. a second pipe section; 9. a pipe section III; 10. a housing; 11. a cover plate; 12. a seal ring; 13. an air inlet pipe; 14. an air outlet pipe; 15. a liquid outlet pipe.
Detailed Description
Examples
Fig. 1 is the utility model relates to a from the structural schematic diagram of stacked ultra-low temperature refrigerating plant embodiment, fig. 2 is the utility model relates to a from the inside pipeline structure schematic diagram of evaporator of stacked ultra-low temperature refrigerating plant embodiment. As shown in the figures, the self-cascade ultralow temperature refrigerating device comprises a compressor which has an existing structure and is used for compressing gaseous refrigerant to obtain high-temperature and high-pressure gaseous refrigerant. The refrigerant in the compressor is a mixture of three refrigerants with different boiling points, namely R600a, R23 and R14, which are commonly used refrigerants in the prior art.
The compressor is connected with the condenser through a first connecting pipe 1, and oil content is arranged on the first connecting pipe 1 between the compressor and the condenser. Oil content promptly oil and gas separator for current structure, the oil content is connected with compressor and condenser through the connecting pipe respectively, and the oil content still is connected with the compressor through returning oil pipe. The oil-gas separator collects the liquid gasoline mixed in the gas refrigerant and then sends the liquid gasoline into the compressor through the oil return pipe for recycling, so that the oil consumption of the compressor is reduced. The mixed gas refrigerant compressed by the compressor is sent into the condenser through the connecting pipe I1, the refrigerant exchanges heat with air in the condenser, the R600a becomes liquid after exchanging heat in the condenser, and the R23 and the R14 still keep gas state. The high-pressure high-temperature mixed gas refrigerant passes through the condenser to obtain a high-pressure medium-temperature gas-liquid mixed refrigerant.
The condenser is connected with the top of the gas-liquid separator through a connecting pipe. A filter is arranged between the condenser and the gas-liquid separator, the condenser is connected with the filter through a second connecting pipe 2, and the filter is connected with the top of the gas-liquid separator through a third connecting pipe 3. The filter only has the filtering function on the mixed refrigerant, and the filter has the existing structure. The top of the gas-liquid separator is connected with the evaporator through a connecting pipe IV 4, and the bottom of the gas-liquid separator is connected with the evaporator through a connecting pipe V5. The mixed refrigerant of gas-liquid mixed state from the condenser enters a gas-liquid separator through a connecting pipe II 2, a filter and a connecting pipe III 3, the gaseous refrigerant and the liquid refrigerant are separated in the gas-liquid separator, the liquid R600a enters an evaporator through a connecting pipe five 5 at the bottom, and the mixed refrigerant of gaseous R23 and R14 enters an evaporator through a connecting pipe four 4. The evaporator is connected to the compressor through a connection pipe six 6, and the mixed refrigerant is fed into the compressor through the connection pipe six 6 to form a circulation circuit.
The fourth connecting pipe 4 is a stepped pipe and comprises a first pipe section 7, a second pipe section 8 and a third pipe section 9, wherein the pipe diameters of the first pipe section 7, the second pipe section 8 and the third pipe section 9 are sequentially reduced, and the first pipe section 7 is communicated with the third pipe section 9 through the second pipe section 8. The inner diameter of the first pipe section 7 is 6mm, the inner diameters of the second pipe section 8 and the third pipe section 9 are capillaries, the inner diameter of the second pipe section 8 is 4mm, and the inner diameter of the third pipe section 9 is 1 mm. And the connecting pipe five 5 is a capillary with the inner diameter of 1 mm. The end of the pipe section three 9 and the end of the connection pipe five 5 are communicated with one end of the connection pipe six 6 in the evaporator, and the R23 and R14 mixed refrigerant in the pipe section three 9 and the R600a refrigerant in the connection pipe five 5 are mixed in the connection pipe six 6 and then fed into the compressor through the connection pipe six 6. The capillary tube is a long copper tube with a smaller inner diameter and is of an existing structure. The capillary tube has the functions of throttling, reducing pressure and cooling.
The liquid R600a refrigerant in the evaporator inner connecting pipe five 5 evaporates and absorbs heat in the evaporator and becomes gaseous refrigerant; the temperature of the mixed gas refrigerant of the R23 and the R14 in the second pipe section 8 is reduced by the R600a in the evaporation and heat absorption processes, when the temperature reaches the condensation point of the R23 with a higher boiling point, the R23 is condensed into liquid in the second pipe section 8, and the R14 still keeps a gas state; the liquid R23 refrigerant is throttled and depressurized under the action of the second pipe section 8, evaporation and heat absorption are started in the evaporator, and R23 is evaporated into a gas state at the joint of the second pipe section 8 and the third pipe section 9; r23 refrigerates and cools R14 in the evaporation process, R14 is condensed into liquid after the temperature reaches the condensation point of R14, the liquid R14 refrigerant starts to evaporate and absorb heat in the evaporator to change into gas under the throttling and pressure reducing effects of the third pipe section 9, and R14 is evaporated into gas at the tail end of the third pipe section 9; all three refrigerants changed into the gaseous state are mixed in the connection pipe six 6 and then returned to the compressor through the connection pipe six 6, completing one cycle.
The evaporation of the refrigerant takes place in the evaporator, absorbing heat from the outside and the temperature at the end of the third tube section 9 can be lowered to-100 ℃. Refrigerating plant can refrigerate for refrigeration plant such as cold-trap, also can regard as the cold head to use.
Fig. 3 is a schematic structural view of a gas-liquid separator according to an embodiment of the self-cascade ultra-low temperature refrigerating apparatus of the present invention. The gas-liquid separator includes a housing 10, and the housing 10 is made of copper or stainless steel. A cover plate 11 is arranged above the shell 10, and the cover plate 11 is fixedly connected with the shell 10 through screws. An O-shaped rubber sealing ring 12 is arranged at the top of the casing 10, and the sealing ring 12 is located between the casing 10 and the cover plate 11 to seal the joint of the casing 10 and the cover plate 11. The cover plate 11 is provided with an air inlet pipe 13 and an air outlet pipe 14, and an air outlet of the air inlet pipe 13 is positioned at the lower part of the shell 10. The lower part of the air inlet pipe 13 is provided with a hem, and the bottom of the hem is provided with an air outlet facing the inner wall of the shell 10. The bottom end of the outlet pipe 14 is located at the top of the housing 10. The bottom of the housing 10 is provided with a liquid outlet pipe 15. The air inlet pipe 13 is communicated with the third connecting pipe 3, the air outlet pipe 14 is communicated with the fourth connecting pipe 4, and the liquid outlet pipe 15 is communicated with the fifth connecting pipe 5. The mixed refrigerant in a mixed state flows into the gas-liquid separator from the inlet pipe 13, the gravity of the liquid refrigerant is high, and the liquid R600a refrigerant flows downwards along the inner wall of the shell 10 and is collected at the bottom of the shell 10 and flows into the evaporator through the liquid outlet pipe 15 and the connecting pipe five 5. The gaseous R23 and R14 mixed refrigerant has a small specific gravity and flows into the evaporator through the air outlet pipe 14 and the connecting pipe; separation of gaseous refrigerant and liquid refrigerant is achieved.
Therefore, the utility model adopts the above structure from overlapping formula ultra-low temperature refrigerating plant can solve the problem that current refrigeration plant hardly reaches the lower temperature, and the terminal temperature of evaporimeter can reduce to-100 ℃, has simple structure's advantage.
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 (8)
1. The utility model provides a from overlapping formula ultra-low temperature refrigerating plant which characterized in that: the condenser is connected with the top of the gas-liquid separator through a connecting pipe, the top of the gas-liquid separator is connected with the evaporator through a connecting pipe IV, the bottom of the gas-liquid separator is connected with the evaporator through a connecting pipe V, the connecting pipe V is a capillary tube, and the evaporator is connected with the compressor through a connecting pipe VI to form a circulation loop;
the connecting pipe IV is a stepped pipe and comprises a pipe section I, a pipe section II and a pipe section III, the pipe diameters of the pipe section I, the pipe section II and the pipe section III are sequentially reduced, the pipe section I is communicated with the pipe section III through the pipe section II, the pipe section II and the pipe section III are capillary tubes, and the tail end of the pipe section III and the tail end of the connecting pipe V are communicated with one end of the connecting pipe VI in the evaporator;
the refrigerant in the compressor is a mixture of three refrigerants having different boiling points.
2. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: and oil content is arranged on a first connecting pipe between the compressor and the condenser.
3. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: a filter is arranged between the condenser and the gas-liquid separator, the condenser is connected with the filter through a second connecting pipe, and the filter is connected with the gas-liquid separator through a third connecting pipe.
4. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: the three refrigerants are R600a, R23 and R14, respectively.
5. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: the inner diameter of the first pipe section is 6mm, the inner diameter of the second pipe section is 4mm, and the inner diameter of the third pipe section is 1 mm.
6. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: the inner diameter of the connecting pipe V is 1 mm.
7. The self-stacking ultra-low temperature refrigeration device according to claim 1, wherein: the gas-liquid separator comprises a shell, a cover plate is arranged above the shell, a sealing ring is arranged at the top of the shell and positioned between the shell and the cover plate, a gas inlet pipe and a gas outlet pipe are arranged on the cover plate, a gas outlet of the gas inlet pipe is positioned at the lower part of the shell, a gas inlet of the gas outlet pipe is positioned at the top of the shell, and a liquid outlet pipe is arranged at the bottom of the shell; the air inlet pipe is communicated with a connecting pipe between the condenser and the gas-liquid separator, the air outlet pipe is communicated with the fourth connecting pipe, and the liquid outlet pipe is communicated with the fifth connecting pipe.
8. The self-stacking ultra-low temperature refrigeration device according to claim 7, wherein: the lower part of the air inlet pipe is provided with a folded edge, and the bottom of the folded edge is provided with an air outlet facing the inner wall of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922319736.6U CN211146955U (en) | 2019-12-20 | 2019-12-20 | Self-overlapping type ultralow-temperature refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922319736.6U CN211146955U (en) | 2019-12-20 | 2019-12-20 | Self-overlapping type ultralow-temperature refrigerating device |
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| Publication Number | Publication Date |
|---|---|
| CN211146955U true CN211146955U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922319736.6U Active CN211146955U (en) | 2019-12-20 | 2019-12-20 | Self-overlapping type ultralow-temperature refrigerating device |
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| Country | Link |
|---|---|
| CN (1) | CN211146955U (en) |
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