CN202973641U - -80 DEG C series-parallel automatic switchable cascade refrigeration system - Google Patents
-80 DEG C series-parallel automatic switchable cascade refrigeration system Download PDFInfo
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- CN202973641U CN202973641U CN2012206070589U CN201220607058U CN202973641U CN 202973641 U CN202973641 U CN 202973641U CN 2012206070589 U CN2012206070589 U CN 2012206070589U CN 201220607058 U CN201220607058 U CN 201220607058U CN 202973641 U CN202973641 U CN 202973641U
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Abstract
The utility model discloses a -80 DEG C series-parallel automatic switchable cascade refrigeration system, which comprises a high-temperature-level refrigeration system and a low-temperature-level refrigeration system, wherein the high-temperature-level refrigeration system comprises a high-temperature-level compressor, and an outlet of the high-temperature-level compressor is communicated with a liquid storage tank through a high-temperature condenser; an outlet of the liquid storage tank is divided into two paths by a dry filter, and an outlet of a high-temperature evaporator is communicated with an inlet of the high-temperature-level compressor; the low-temperature-level refrigeration system comprises a low-temperature-level compressor, and an outlet of the low-temperature-level compressor is divided into two paths; one path of outlet of an expansion container is communicated with an inlet of the low-temperature-level compressor, and the other path of outlet of the expansion container is communicated with a low-temperature evaporator through a shell pass of a tube heat exchanger; an outlet of the low-temperature evaporator is communicated with one outlet of an oil separator, and the other outlet of the oil separator is communicated with an inlet of the low-temperature-level compressor through an oil return capillary. The system provided by the utility model has the advantages of realization of temperature control from room temperature to -80 DEG C, large refrigeration interval range, automatic switching of high and low temperature control, high effective utilization rate of the compressor, and low running cost.
Description
Technical field
The utility model relates to refrigeration, especially relates to-80 ℃ of connection in series-parallel automatic switchover cascade refrigeration systems.
Background technology
-80 ℃ of refrigeration systems are mainly used in the research fields such as industrial production, low-temperature test and biomedicine, and the mode that obtains at present this warm area is two single stage compress overlapping cycle refrigeration systems.Low temperature level loop in two single stage compress overlapping cycle refrigeration systems connects by plate type heat exchanger with high temperature level loop, and plate type heat exchanger is realized the condensation of lowering the temperature of gas refrigerant in low temperature level loop by cold-producing medium evaporation in high temperature level loop.This traditional cascade refrigeration system, its cryogenic temperature interval are-40 ℃ to-80 ℃, cause this system can not realize that room temperature (20 ℃) to the temperature of-40 ℃ controls, high temperature level and low temperature stage compressor be high load capacity work simultaneously, the lost of life, the waste resource, cost is larger.
Summary of the invention
The utility model purpose is to provide a kind of-80 ℃ connection in series-parallel automatic switchover cascade refrigeration system.
For achieving the above object, the utility model is taked following technical proposals:
described in the utility model-80 ℃ connection in series-parallel automatic switchover cascade refrigeration system, comprise high temperature level refrigeration system and low temperature level refrigeration system, described high temperature level refrigeration system comprises the high temperature stage compressor, described high temperature stage compressor outlet is communicated with fluid reservoir by the high temperature condenser, described fluid reservoir outlet drying filter is divided into two-way, the first via is communicated with the import of high temperature stage compressor by the low temperature path of magnetic valve, heating power expansion valve, plate type heat exchanger, and the second the tunnel is communicated with high-temperature evaporator through magnetic valve, capillary, described high-temperature evaporator outlet is communicated with the import of high temperature stage compressor, described low temperature level refrigeration system comprises the low temperature stage compressor, the outlet of described low temperature stage compressor is divided into two-way, the first via is communicated with oil eliminator, the second the tunnel is communicated with expansion vessel with unloader, described expansion vessel outlet one tunnel is communicated with the import of low temperature stage compressor, another road is communicated with cryogenic vaporizer by the shell side of tubing heat exchanger, heating power expansion valve is passed through in described cryogenic vaporizer outlet, the tube side of tubing heat exchanger, device for drying and filtering, the high temperature channel of described plate type heat exchanger, low-temperature condenser is communicated with an outlet of described oil eliminator, another outlet of oil eliminator is communicated with the import of low temperature stage compressor through the oil return capillary.
Be parallel with pressure controller between the import and export of described high temperature stage compressor.
The utility model advantage is to realize the extremely temperature control of-80 ℃ of room temperature, and the refrigeration interval range is large; High and low temperature is controlled and is automaticallyed switch, and the compressor effective rate of utilization is high, and operating cost is low.
Description of drawings
Fig. 1 is system architecture schematic diagram of the present utility model.
The specific embodiment
as shown in Figure 1,80 ℃ of connection in series-parallel automatic switchover cascade refrigeration systems described in the utility model, comprise high temperature level refrigeration system and low temperature level refrigeration system, described high temperature level refrigeration system comprises high temperature stage compressor 1, described high temperature stage compressor 1 outlet is communicated with fluid reservoir 4 by high temperature condenser 3, described fluid reservoir 4 outlet drying filters 5 are divided into two-way, the first via is communicated with 1 import of high temperature stage compressor by the low temperature path of magnetic valve 6, heating power expansion valve 8, plate type heat exchanger 9, and the second the tunnel is communicated with high-temperature evaporator 14 through magnetic valve 7, capillary 10, described high-temperature evaporator 14 outlets are communicated with 1 import of high temperature stage compressor, described low temperature level refrigeration system comprises low temperature stage compressor 19, the outlet of described low temperature stage compressor 19 is divided into two-way, the first via is communicated with oil eliminator 21, the second the tunnel is communicated with expansion vessel 16 with unloader 17, described expansion vessel 16 outlets one tunnel are communicated with 19 imports of low temperature stage compressor, another road is communicated with cryogenic vaporizer 13 by the shell side of tubing heat exchanger 15, described cryogenic vaporizer 13 outlets are by heating power expansion valve 11, the tube side of tubing heat exchanger 15, device for drying and filtering 12, the high temperature channel of described plate type heat exchanger 9, low-temperature condenser 22 is communicated with an outlet of described oil eliminator 21, another outlet of oil eliminator 21 is communicated with 19 imports of low temperature stage compressor through oil return capillary 20.Be parallel with respectively pressure controller 2,18 between the import and export of high temperature stage compressor 1 and low temperature stage compressor 19.
The utility model operation principle is summarized as follows:
During work, according to the difference that cryogenic temperature is set, realize respectively the temperature control of high temperature level refrigeration (room temperature is to-40 ℃) and low temperature level refrigeration (40 ℃ to-8 0 ℃) by magnetic valve 6,7 automatic switchover.The refrigerating circuit of described high temperature level realize high temperature level refrigeration (room temperature is to-40 ℃) and to the low temperature level refrigerating circuit carry out the condensation function, in the refrigerating circuit of high temperature level cold-producing medium by evaporation in plate type heat exchanger 9 to the condensation of lowering the temperature of gas refrigerant in the refrigerating circuit of low temperature level, the refrigerating circuit of high temperature level to the low temperature level refrigerating circuit to carry out condensation be separate.
The steam that cold-producing medium in low temperature level refrigerating circuit condensation portion is formed HTHP after 1 compression of high temperature stage compressor of high temperature level refrigerating circuit drains into high temperature condenser 3, the refrigerant vapour of HTHP is the heat release condensation in high temperature condenser 3, then enter device for drying and filtering 5 dryings, then enter heating power expansion valve 8, gas-liquid mixture after step-down flows to the cryogenic pipe of plate type heat exchanger 9, after cold-producing medium heat exchange in the high temperature channel of plate type heat exchanger 9, send high temperature stage compressor 1 back to.Refrigerating circuit plays condensation to the refrigerating circuit of high temperature level to the low temperature level.
In low temperature level refrigeration road, the steam of cold-producing medium formation HTHP after 19 compressions of low temperature stage compressor drains into low-temperature condenser 22, the refrigerant vapour of HTHP is the precooling heat release in low-temperature condenser 22, then enter cold-producing medium heat exchange heat release condensation in the high temperature channel of plate type heat exchanger 9 and low temperature path, then enter the hot device 15 of tubular type and cross cold heat releases.Cross and enter heating power expansion valve 11 step-down throttlings after cold, gas-liquid mixture after throttling enters low temperature level evaporimeter 13, cold-producing medium evaporation endothermic in low temperature level evaporimeter 13 becomes steam, enter again pipe heat exchanger 15 and enter low temperature stage compressor 19 after overheated and constantly circulate, thereby make the cryogenic refrigeration temperature between-40 ℃ to-80 ℃.
Claims (2)
1.-80 ℃ of connection in series-parallel automatic switchover cascade refrigeration systems, comprise high temperature level refrigeration system and low temperature level refrigeration system, it is characterized in that: described high temperature level refrigeration system comprises high temperature stage compressor (1), described high temperature stage compressor (1) outlet is communicated with fluid reservoir (4) by high temperature condenser (3), described fluid reservoir (4) outlet drying filter (5) is divided into two-way, the first via is by magnetic valve (6), heating power expansion valve (8), the low temperature path of plate type heat exchanger (9) is communicated with high temperature stage compressor (1) import, the second the tunnel through magnetic valve (7), capillary (10) is communicated with high-temperature evaporator (14), described high-temperature evaporator (14) outlet is communicated with high temperature stage compressor (1) import, described low temperature level refrigeration system comprises low temperature stage compressor (19), the outlet of described low temperature stage compressor (19) is divided into two-way, the first via is communicated with oil eliminator (21), the second the tunnel is communicated with expansion vessel (16) with unloader (17), described expansion vessel (16) outlet one tunnel is communicated with low temperature stage compressor (19) import, another road is communicated with cryogenic vaporizer (13) by the shell side of tubing heat exchanger (15), described cryogenic vaporizer (13) outlet is by heating power expansion valve (11), the tube side of tubing heat exchanger (15), device for drying and filtering (12), the high temperature channel of described plate type heat exchanger (9), low-temperature condenser (22) is communicated with an outlet of described oil eliminator (21), another outlet of oil eliminator (21) is communicated with low temperature stage compressor (19) import through oil return capillary (20).
2. according to claim 1-80 ℃ connection in series-parallel automatic switchover cascade refrigeration system, is characterized in that: be parallel with respectively pressure controller (2,18) between the import and export of described high temperature stage compressor (1) and low temperature stage compressor (19).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012206070589U CN202973641U (en) | 2012-11-16 | 2012-11-16 | -80 DEG C series-parallel automatic switchable cascade refrigeration system |
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| CN2012206070589U CN202973641U (en) | 2012-11-16 | 2012-11-16 | -80 DEG C series-parallel automatic switchable cascade refrigeration system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486755A (en) * | 2013-10-18 | 2014-01-01 | 安徽美乐柯制冷空调设备有限公司 | Carbon dioxide overlapping-type commercial refrigeration system |
| CN104807231A (en) * | 2015-05-12 | 2015-07-29 | 上海海洋大学 | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| CN104807276A (en) * | 2015-05-07 | 2015-07-29 | 天津商业大学 | Three-stage step cooling super-low temperature cold store |
| CN110849009A (en) * | 2019-12-11 | 2020-02-28 | 郑州长城科工贸有限公司 | Cascade refrigeration system and method for reducing starting load thereof |
| CN113432328A (en) * | 2021-06-08 | 2021-09-24 | 广州市西麦柯制冷通用设备有限公司 | Ultra-low temperature frequency conversion overlapping control system |
-
2012
- 2012-11-16 CN CN2012206070589U patent/CN202973641U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486755A (en) * | 2013-10-18 | 2014-01-01 | 安徽美乐柯制冷空调设备有限公司 | Carbon dioxide overlapping-type commercial refrigeration system |
| CN103486755B (en) * | 2013-10-18 | 2016-02-24 | 安徽美乐柯制冷空调设备有限公司 | A kind of carbon dioxide overlapping-type commercial refrigeration system |
| CN104807276A (en) * | 2015-05-07 | 2015-07-29 | 天津商业大学 | Three-stage step cooling super-low temperature cold store |
| CN104807231A (en) * | 2015-05-12 | 2015-07-29 | 上海海洋大学 | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| WO2016180021A1 (en) | 2015-05-12 | 2016-11-17 | 上海海洋大学 | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| JP2017519171A (en) * | 2015-05-12 | 2017-07-13 | 上海海洋大学Ｓｈａｎｇｈａｉ Ｏｃｅａｎ Ｕｎｉｖｅｒｓｉｔｙ | Marine energy-saving cryogenic refrigeration system that can convert two-stage cascades |
| EP3299747A4 (en) * | 2015-05-12 | 2019-01-23 | Shanghai Ocean University | Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship |
| CN110849009A (en) * | 2019-12-11 | 2020-02-28 | 郑州长城科工贸有限公司 | Cascade refrigeration system and method for reducing starting load thereof |
| CN110849009B (en) * | 2019-12-11 | 2023-10-13 | 郑州长城科工贸有限公司 | Cascade refrigeration system and method for reducing starting load thereof |
| CN113432328A (en) * | 2021-06-08 | 2021-09-24 | 广州市西麦柯制冷通用设备有限公司 | Ultra-low temperature frequency conversion overlapping control system |
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Granted publication date: 20130605 |
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