CN215676612U - Residual cold utilization system - Google Patents
Residual cold utilization system Download PDFInfo
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- CN215676612U CN215676612U CN202022706946.3U CN202022706946U CN215676612U CN 215676612 U CN215676612 U CN 215676612U CN 202022706946 U CN202022706946 U CN 202022706946U CN 215676612 U CN215676612 U CN 215676612U
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Abstract
The utility model relates to the field of freeze-drying and production of medicines, in particular to a residual cold utilization system. The system comprises a circulating system and a refrigerating system, wherein the circulating system comprises a circulating pump, a slab outlet pipeline is connected with the circulating pump, the circulating pump is connected with a heater, and the heater is connected with a slab inlet pipeline; the heater is also connected with a circulating electromagnetic valve through a residual cooling heat exchanger of the refrigerating system, and the circulating electromagnetic valve is connected with a slab inlet pipeline; the refrigeration system comprises a compressor, the compressor is connected with a throttle valve through a condenser, the throttle valve is connected with an evaporator, and the evaporator is directly connected with or connected with the compressor through a waste heat exchanger. The utility model absorbs the cold energy of the return air of the refrigerating system through the circulating system and utilizes the residual cold of the refrigerating system to realize the temperature reduction of the circulating system, thereby reducing the fluctuation of the temperature control of the partition board in a high-temperature section.
Description
Technical Field
The utility model relates to the field of freeze-drying and production of medicines, in particular to a residual cold utilization system.
Background
The medicine freeze dryer is one of freeze dryers, is mainly used for freeze drying and production of medicines, and has high control requirements on cleanliness, sterility degree and temperature and vacuum degree of medicine drying, so that a circulation system and a refrigeration system are required to be equipped. The circulating system mainly plays a role in heat conduction or cooling, and heats or cools the partition plate (or called a plate layer) by absorbing heat of the electric heater or cold of the refrigerating system. The temperature of a partition plate of the freeze dryer is generally required to be controlled to be +/-2 ℃ or even +/-1 ℃, the temperature control at a low-temperature section is generally not problematic, but when the temperature of the equipment is controlled at a high-temperature section (0-30 ℃), the refrigerating capacity is increased, the fluctuation of the temperature control is increased, so that a cold source with smaller refrigerating capacity can be searched for and utilized, the matching type selection of the refrigerating system is selected according to the maximum refrigerating capacity of the refrigerating system, the lower the used temperature is, the smaller the refrigerating capacity is, and conversely, the larger the refrigerating capacity is. When the refrigeration system is used, the refrigeration system is required to cool the slab layer and the cold trap (also called a vapor trap), the cooling process of the cold trap is carried out all the time by absorbing heat through phase change (from liquid to gas) of the refrigerant, the refrigerant is changed into a low-temperature (generally less than minus 40 ℃) gas state after coming out of the cold trap, and the part of cold energy (namely residual cold) carried by the gas refrigerant is not well utilized, so that the waste of resources is caused.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the defects of the prior art are overcome, the residual cold utilization system is provided, the cold quantity of return air of the refrigeration system is absorbed through the circulating system, and the residual cold of the refrigeration system is utilized to realize the cooling of the circulating system, so that the fluctuation of the temperature control of the partition plate at a high-temperature section is reduced.
In order to solve the technical problems in the prior art, the utility model carries out the following technical scheme design: the residual cold utilization system comprises a circulating system and a refrigerating system, wherein the circulating system comprises a circulating pump, a slab outlet pipeline is connected with the circulating pump, the circulating pump is connected with a heater, and the heater is connected with a slab inlet pipeline; the heater is also connected with a circulating electromagnetic valve through a residual cooling heat exchanger of the refrigerating system, and the circulating electromagnetic valve is connected with a slab inlet pipeline; the refrigeration system comprises a compressor, the compressor is connected with a throttle valve through a condenser, the throttle valve is connected with an evaporator, and the evaporator is directly connected with or connected with the compressor through a waste heat exchanger.
Preferably, the throttle valve comprises a plate cold throttle valve and a trap cold throttle valve, and the evaporator comprises a refrigeration heat exchanger and a coil in a cold trap.
Preferably, the compressor is connected with the trap cold throttle valve and the coil pipe through the condenser, the coil pipe is connected with the residual cold heat exchanger, and the residual cold heat exchanger is connected with the compressor.
Preferably, the compressor is connected with the plate cold throttle valve through the condenser, the plate cold throttle valve is connected with the refrigeration heat exchanger, and the refrigeration heat exchanger is connected with the compressor.
Preferably, the heater is connected with a refrigeration heat exchanger, and the refrigeration heat exchanger is respectively connected with the plate layer inlet pipeline and the residual cooling heat exchanger. Compared with the prior art, the utility model has the following advantages:
the utility model utilizes the residual cold contained in the refrigerant after the refrigeration system cools the cold trap to cool the circulating system, thereby reducing the fluctuation of the temperature control of the partition board in a high-temperature section. The refrigeration capacity contained in the refrigerant gas is fully utilized, the utilization rate of the refrigeration capacity can be improved, the temperature difference of temperature control of the high-temperature section of the plate layer is reduced, the problem of large temperature control fluctuation of the high-temperature section of the plate layer is solved, and the energy consumption is saved.
Drawings
FIG. 1 is a schematic diagram of the connection of the present invention;
in the figure: 1. a circulation pump; 2. a heater; 3. a circulating solenoid valve; 4. a compressor; 5. a condenser; 6. a refrigeration heat exchanger; 7. a plate-cooled throttle valve; 8. a trap cold throttle valve; 9. a residual cooling heat exchanger; 10. and (4) coiling the pipe.
Detailed Description
Embodiments of the utility model are further described with reference to the accompanying drawings in which:
example 1:
the residual cold utilization system comprises a circulating system and a refrigerating system, wherein the circulating system comprises a circulating pump 1, a plate layer outlet pipeline is connected with the circulating pump 1, the circulating pump 1 is connected with a heater 2, and the heater 2 is connected with a plate layer inlet pipeline; the heater 2 is also connected with the circulating electromagnetic valve 3 through a residual cooling heat exchanger 9 of the refrigerating system, and the circulating electromagnetic valve 3 is connected with a slab inlet pipeline; the refrigerating system comprises a compressor 4, the compressor 4 is connected with a throttle valve through a condenser 5, the throttle valve is connected with an evaporator, and the evaporator is directly connected with or connected with the compressor 4 through a waste heat exchanger 9.
When the system operates, the circulating system absorbs residual cold contained in gaseous refrigeration in return air of a cold trap in the refrigerating system through the residual cold heat exchanger 9, so that the temperature of the circulating system is reduced, and the temperature of the plate layer inlet is maintained within an acceptable fluctuation range of the set temperature.
The circulating system is internally provided with a heat-conducting medium (usually silicon oil) in a flowing manner, so that the heating function and the cooling function can be realized. Refrigerant flows in the refrigerating system, and the refrigerant realizes conversion from low pressure to high pressure and from low temperature to high temperature in the compressor 4, and the principle is similar to that of an inflator; the refrigerant is converted from a gas state to a liquid state in the condenser 5, namely, the condensation process of the refrigerant is realized; the refrigerant is reduced in pressure as it flows through the throttle valve, thereby achieving the ability to change from a liquid state to a gaseous state; the refrigerant changes from liquid state to gas state in the evaporator to provide a large amount of cold, and meanwhile, the refrigerant gas state also changes into lower temperature to become a small cold source.
The throttle valves comprise a plate cold throttle valve 7 and a trap cold throttle valve 8, and the evaporator comprises a refrigeration heat exchanger 6 and a coil 10 in the cold trap.
The compressor 4 is connected with the trap cold throttle valve 8 and the coil pipe 10 through the condenser 5, the coil pipe 10 is connected with the residual cold heat exchanger 9, and the residual cold heat exchanger 9 is connected with the compressor 4.
The compressor 4 is connected with a plate cold throttle valve 7 through a condenser 5, the plate cold throttle valve 7 is connected with a refrigeration heat exchanger 6, and the refrigeration heat exchanger 6 is connected with the compressor 4.
The heater 2 is connected with a refrigeration heat exchanger 6, and the refrigeration heat exchanger 6 is respectively connected with a plate layer inlet pipeline and a residual cooling heat exchanger 9.
The utility model utilizes the residual cold contained in the refrigerant after the refrigeration system cools the cold trap to cool the circulating system, thereby reducing the fluctuation of the temperature control of the partition plate in a high-temperature section.
When the inlet temperature of the plate layer needs to be stabilized at a certain temperature t0 ℃ of 0-30 ℃, and when the actual temperature t is less than or equal to t0-0.5, the circulating electromagnetic valve 3 is closed, the heater 2 is opened, and the circulating system is heated; when the actual temperature t is t0, the circulation solenoid valve 3 is closed, the heater 2 is closed, and t still rises due to the residual heat of the heater 2; t is more than or equal to t0+0.5, the circulating electromagnetic valve 3 is opened, the heater 2 is closed, at the moment, the circulating system is cooled, the temperature of the inlet of the slab is slowly reduced to t0-0.5, and the whole process is repeated. Thus, the inlet temperature of the plate layer can be controlled within +/-1 ℃.
Claims (5)
1. The residual cold utilization system is characterized by comprising a circulating system and a refrigerating system, wherein the circulating system comprises a circulating pump (1), a plate layer outlet pipeline is connected with the circulating pump (1), the circulating pump (1) is connected with a heater (2), and the heater (2) is connected with a plate layer inlet pipeline; the heater (2) is also connected with the circulating electromagnetic valve (3) through a residual cold heat exchanger (9) of the refrigerating system, and the circulating electromagnetic valve (3) is connected with a slab inlet pipeline; the refrigeration system comprises a compressor (4), the compressor (4) is connected with a throttle valve through a condenser (5), the throttle valve is connected with an evaporator, and the evaporator is directly connected with or connected with the compressor (4) through a waste heat exchanger (9).
2. A residual heat utilization system according to claim 1, characterized in that the throttle valve comprises a plate cold throttle valve (7) and a trap cold throttle valve (8), and the evaporator comprises a refrigeration heat exchanger (6) and a coil (10) in a cold trap.
3. The residual cold utilization system of claim 1, wherein the compressor (4) is connected with the trap cold throttle valve (8) and the coil (10) through the condenser (5), the coil (10) is connected with the residual cold heat exchanger (9), and the residual cold heat exchanger (9) is connected with the compressor (4).
4. The residual cold utilization system according to claim 1, wherein the compressor (4) is connected with the plate cold throttle valve (7) through the condenser (5), the plate cold throttle valve (7) is connected with the refrigeration heat exchanger (6), and the refrigeration heat exchanger (6) is connected with the compressor (4).
5. The residual cooling utilization system according to claim 4, characterized in that the heater (2) is connected with the refrigeration heat exchanger (6), and the refrigeration heat exchanger (6) is respectively connected with the plate layer inlet pipeline and the residual cooling heat exchanger (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022706946.3U CN215676612U (en) | 2020-11-20 | 2020-11-20 | Residual cold utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022706946.3U CN215676612U (en) | 2020-11-20 | 2020-11-20 | Residual cold utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215676612U true CN215676612U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022706946.3U Active CN215676612U (en) | 2020-11-20 | 2020-11-20 | Residual cold utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215676612U (en) |
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2020
- 2020-11-20 CN CN202022706946.3U patent/CN215676612U/en active Active
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