CN201866980U - Auto-cascade low-temperature refrigerating device - Google Patents
Auto-cascade low-temperature refrigerating device Download PDFInfo
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- CN201866980U CN201866980U CN2010206276366U CN201020627636U CN201866980U CN 201866980 U CN201866980 U CN 201866980U CN 2010206276366 U CN2010206276366 U CN 2010206276366U CN 201020627636 U CN201020627636 U CN 201020627636U CN 201866980 U CN201866980 U CN 201866980U
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Abstract
The utility model relates to an auto-cascade low-temperature refrigerating device. Each refrigerating member in the low-temperature refrigerating device comprises a compressor (1), a condenser (2), a first gas-liquid separator (3), a first heat regenerator (5), a first throttling member (7), a condenser evaporator (9), a second heat regenerator (10), a second throttling member (11), an evaporator (12), a first ejector (4), a second ejector (8) and a second gas-liquid separator (6), wherein the refrigerating members and refrigerant form the auto-cascade low-temperature refrigerating device; and by utilizing the ejector, the low-temperature refrigerating device recycles throttling loss, reduces the pressure ratio, and has higher cycle performance as well as higher refrigerating speed, while obtaining low temperature.
Description
Technical field
The utility model belongs to refrigeration technology field, refers more particularly to a kind of automatic cascade cryogenic refrigerating unit.
Background technology
Traditional automatic cascade refrigeration machine mainly comprises: compressor, condenser, gas-liquid separator, condenser/evaporator, throttling arrangement and evaporimeter.
Traditional automatic cascade refrigeration machine adopts multiple non-azeotropic refrigerant as cold-producing medium, utilize gas-liquid separator that higher boiling liquid refrigerant and low boiling gaseous working medium are separated, evaporate by higher boiling working medium and to realize the low boiling working fluid condensation, become at present-40 ℃ to one of main refrigeration modes of-150 ℃ of warm areas, and constantly promoted in the cryogenic refrigeration field, have vast potential for future development.
But, traditional automatic cascade refrigeration machine is in environment temperature and one timing of cold-producing medium working medium, obtain lower evaporating temperature and must reduce evaporating pressure, this will cause, and the pressure of inspiration(Pi) of compressor descends, pressure ratio increases, produce bigger restriction loss and heat transfer irreversible loss simultaneously, cause the coefficient of refrigerating performance of this system obviously to descend, this problem is also restricting the promotion and application of traditional automatic cascade refrigeration machine in the low temperature field.
Summary of the invention
For addressing the above problem, the utility model has designed a kind of automatic cascade cryogenic refrigerating unit, this cryogenic refrigerating unit utilizes injector to reclaim restriction loss and reduces pressure ratio, can have higher cycle performance and obtain refrigerating speed faster when obtain low temperature.
For achieving the above object, the utility model adopts following technical scheme:
Cooling piece in the described automatic cascade cryogenic refrigerating unit comprises compressor, condenser, first gas-liquid separator, first regenerator, first throttle spare, condenser/evaporator, second regenerator, second throttling element and evaporimeter, cooling piece also includes first injector, second injector and second gas-liquid separator, and the annexation of the automatic cascade cryogenic refrigerating unit that described each cooling piece and cold-producing medium constitute is as follows:
The outlet of compressor links to each other by pipeline with the inlet of condenser, the outlet of condenser links to each other by pipeline with the inlet of first gas-liquid separator, the top exit of first gas-liquid separator links to each other by pipeline with the high-pressure side of condenser/evaporator inlet, and the outlet at bottom of first gas-liquid separator links to each other by pipeline with the high-pressure fluid inlet of first injector; The high-pressure side outlet of condenser/evaporator links to each other by pipeline with the high-pressure side inlet of second regenerator, the outlet of the high-pressure side of second regenerator with link to each other by pipeline with the inlet of evaporimeter again after second throttling element is connected by pipeline, the outlet of evaporimeter links to each other by pipeline with the low-pressure side inlet of second regenerator, and the low-pressure side outlet of second regenerator links to each other by pipeline with the low-pressure fluid inlet of first injector; The outlet of first injector links to each other by pipeline with the high-pressure side inlet of first regenerator, the high-pressure side outlet of first regenerator links to each other by pipeline with the inlet of second gas-liquid separator, the top exit of second gas-liquid separator links to each other by pipeline with the high-pressure fluid inlet of second injector, the outlet at bottom of second gas-liquid separator with link to each other with the low-pressure side inlet of condenser/evaporator again after first throttle spare is connected by pipeline, the low-pressure side outlet of condenser/evaporator links to each other by pipeline with the low-pressure fluid inlet of first injector, and the outlet of first injector links to each other by pipeline with the low-pressure side inlet of first regenerator; The low-pressure side outlet of first regenerator links to each other by pipeline with the air-breathing inlet of compressor.
The cryogenic refrigerating unit of described automatic cascade, the annexation of described cryogenic refrigerating unit or do not comprise second injector and second gas-liquid separator, this moment, the high-pressure side outlet of first regenerator directly with after first throttle spare is connected by pipeline linked to each other with the low-pressure side inlet of condenser/evaporator again, the low-pressure side outlet of condenser/evaporator directly links to each other by pipeline with the low-pressure side inlet of first regenerator, and other annexation is identical with described cryogenic refrigerating unit annexation.
The employed cold-producing medium of the cryogenic refrigerating unit of described automatic cascade or mix the binary non-azeotropic mixed working medium of forming, or ternary or the above non-azeotropic mixed working medium of ternary formed by higher boiling working medium component, low boiling working fluid component and the mixing of ultralow boiling point working medium component by higher boiling working medium component and low boiling working fluid component.
Described automatic cascade cryogenic refrigerating unit, described higher boiling working medium component or R600a, or R152a, or R134a, or R22, or R290, or R1270, or R32, or R143a, or R125.
Described automatic cascade cryogenic refrigerating unit, described low boiling working fluid component or R23, or R13, or go up R170.
Described automatic cascade cryogenic refrigerating unit, described ultralow boiling point working medium component or R728, or R50, or R14, or R1150.
Owing to adopt technical scheme as mentioned above, the utility model produces following beneficial effect:
1, by first injector is set, the restriction loss that utilizes high pressure higher boiling liquid refrigerant injection low pressure low boiling gaseous refrigerant can fully reclaim high boiling component, improve the cycle performance of refrigerating plant, can improve simultaneously the pressure of inspiration(Pi) of compressor, reduce compression ratio, comparable under the same conditions traditional automatic cascade refrigeration machine obtains lower evaporating pressure and evaporating temperature.
2, by second injector is set, utilize high pressure low boiling gaseous refrigerant injection low pressure higher boiling gaseous refrigerant can improve the pressure of inspiration(Pi) and the evaporating temperature that reduces the high boiling component in the condenser/evaporator of the air entry place high boiling component of compressor, thereby obtain refrigerating speed and lower cryogenic temperature faster.
3, cryogenic refrigerating unit of the present utility model can obtain the cryogenic temperature in-40 ℃ to-170 ℃ scopes, refrigerating speed and higher cycle performance faster, and the energy-saving effect highly significant has wide range of applications, and has the good prospect of marketing.
Description of drawings
Fig. 1 is an annexation schematic diagram of the present utility model;
Fig. 2 is a kind of simplification cryogenic refrigerating unit annexation schematic diagram of Fig. 1;
Among the above-mentioned figure: the 1-compressor; The 2-condenser; 3-first gas-liquid separator; 4-first injector; 5-first regenerator; 6-second gas-liquid separator; 7-first throttle spare; 8-second injector; The 9-condenser/evaporator; 10-second regenerator; 11-second throttling element; The 12-evaporimeter.
The specific embodiment
Arrow among Fig. 1-2 only represents that the ducted working medium that is connected between each cooling piece flows to signal.
Cooling piece in the utility model automatic cascade cryogenic refrigerating unit includes compressor 1, condenser 2, first gas-liquid separator 3, first regenerator 5, first throttle spare 7, condenser/evaporator 9, second regenerator 10, second throttling element 11 and evaporimeter 12, and cooling piece also includes first injector 4, second injector 8 and second gas-liquid separator 6.
Employed cold-producing medium or mix the binary non-azeotropic mixed working medium of forming in the above-mentioned cryogenic refrigerating unit, or ternary or the above non-azeotropic mixed working medium of ternary formed by higher boiling working medium component, low boiling working fluid component and the mixing of ultralow boiling point working medium component by higher boiling working medium component and low boiling working fluid component.
Higher boiling working medium component or R600a, or R152a, or R134a, or R22, or R290, or R1270, or R32, or R143a, or R125.
Low boiling working fluid component or R23, or R13, or go up R170.
Ultralow boiling point working medium component or R728, or R50, or R14, or R1150.
The annexation of above-mentioned cryogenic refrigerating unit is as follows:
The outlet of compressor 1 links to each other by pipeline with the inlet of condenser 2, the outlet of condenser 2 links to each other by pipeline with the inlet of first gas-liquid separator 3, the top exit of first gas-liquid separator 3 links to each other by pipeline with the high-pressure side inlet of condenser/evaporator 9, and the outlet at bottom of first gas-liquid separator 3 links to each other by pipeline with the high-pressure fluid inlet of first injector 4.
The high-pressure side outlet of condenser/evaporator 9 links to each other by pipeline with the high-pressure side inlet of second regenerator 10, the outlet of the high-pressure side of second regenerator 10 with link to each other by pipeline with the inlet of evaporimeter 12 again after second throttling element 11 is connected by pipeline, the outlet of evaporimeter 12 links to each other by pipeline with the low-pressure side inlet of second regenerator 10, and the low-pressure side outlet of second regenerator 10 links to each other by pipeline with the low-pressure fluid inlet of first injector 4.
The outlet of first injector 4 links to each other by pipeline with the high-pressure side inlet of first regenerator 5, the high-pressure side outlet of first regenerator 5 links to each other by pipeline with the inlet of second gas-liquid separator 6, the top exit of second gas-liquid separator 6 links to each other by pipeline with the high-pressure fluid inlet of second injector 8, the outlet at bottom of second gas-liquid separator 6 with link to each other with the low-pressure side inlet of condenser/evaporator 9 again after first throttle spare 7 is connected by pipeline, the low-pressure side outlet of condenser/evaporator 9 links to each other by pipeline with the low-pressure fluid inlet of first injector 4, and the outlet of first injector 4 links to each other by pipeline with the low-pressure side inlet of first regenerator 5.
Second injector 8 is located between second gas-liquid separator 6 and first regenerator 5, the working fluid of second injector 8 is the gas that second gas-liquid separator, 6 top exits are rich in low boiling component, the gas injection that is rich in low boiling component that utilizes the elevated pressures state from the steam that is rich in high boiling component of the low-pressure state of condenser/evaporator 12 with the pressure of inspiration(Pi) of the air entry place high boiling component that improves compressor 1 with reduce the evaporating temperature of the high boiling component in the condenser/evaporator 2.
Second gas-liquid separator 6 is located between first injector 4, second injector 8 and the condenser/evaporator 2, gas-liquid two-phase mixed working fluid from 4 outlets of first injector enters second gas-liquid separator 6 after 5 coolings of first regenerator, utilize second gas-liquid separator 6 that the low boiling gaseous working medium is separated with the higher boiling liquid refrigerant, so that utilize the low boiling gaseous working medium to enter that second injector 8 carries out injection and to the further throttling of higher boiling liquid refrigerant.
The low-pressure side outlet of first regenerator 5 links to each other by pipeline with the air-breathing inlet of compressor 1.
The pressure of inspiration(Pi) that being provided with of second injector 8 in the above-mentioned cryogenic refrigerating unit can be improved compressor 1 or reduce the cycle performance of pressure ratio with this cryogenic freezing device of further raising, but also increased the complexity of cryogenic refrigerating unit to a certain extent.Therefore above-mentioned cryogenic refrigerating unit can further be simplified setting to reduce throwing cost just, and the cryogenic refrigerating unit that simplification is provided with as shown in Figure 2.
The difference of Fig. 2 and Fig. 1 is: do not comprise second injector 8 and second gas-liquid separator 6 among Fig. 2, this moment, the high-pressure side outlet of first regenerator 5 directly with after first throttle spare 7 is connected by pipeline linked to each other with the low-pressure side inlet of condenser/evaporator 9 again, the low-pressure side outlet of condenser/evaporator 9 directly links to each other by pipeline with the low-pressure side inlet of first regenerator 5, and other annexation is identical with annexation shown in Figure 1.So the mixed working fluid of first injector 4 outlet directly flows to first throttle spare 7 after 5 coolings of first regenerator, after 7 throttlings of first throttle spare, enter condenser/evaporator 9 and flow back to first regenerator 5 again, after first regenerator 5 is overheated, flow back to compressor 1.
Claims (6)
1. cryogenic refrigerating unit with automatic cascade, cooling piece in this cryogenic refrigerating unit comprises compressor (1), condenser (2), first gas-liquid separator (3), first regenerator (5), first throttle spare (7), condenser/evaporator (9), second regenerator (10), second throttling element (11) and evaporimeter (12), cooling piece also includes first injector (4), second injector (8) and second gas-liquid separator (6), it is characterized in that: the annexation of the automatic cascade cryogenic refrigerating unit that described each cooling piece and cold-producing medium constitute is as follows:
The outlet of compressor (1) links to each other by pipeline with the inlet of condenser (2), the outlet of condenser (2) links to each other by pipeline with the inlet of first gas-liquid separator (3), the top exit of first gas-liquid separator (3) links to each other by pipeline with the high-pressure side inlet of condenser/evaporator (9), and the outlet at bottom of first gas-liquid separator (3) links to each other by pipeline with the high-pressure fluid inlet of first injector (4); The high-pressure side outlet of condenser/evaporator (9) links to each other by pipeline with the high-pressure side inlet of second regenerator (10), the outlet of the high-pressure side of second regenerator (10) with link to each other by pipeline with the inlet of evaporimeter (12) again after second throttling element (11) is connected by pipeline, the outlet of evaporimeter (12) links to each other by pipeline with the low-pressure side inlet of second regenerator (10), and the low-pressure side outlet of second regenerator (10) links to each other by pipeline with the low-pressure fluid inlet of first injector (4); The outlet of first injector (4) links to each other by pipeline with the high-pressure side inlet of first regenerator (5), the high-pressure side outlet of first regenerator (5) links to each other by pipeline with the inlet of second gas-liquid separator (6), the top exit of second gas-liquid separator (6) links to each other by pipeline with the high-pressure fluid inlet of second injector (8), the outlet at bottom of second gas-liquid separator (6) with link to each other with the low-pressure side inlet of condenser/evaporator (9) again after first throttle spare (7) is connected by pipeline, the low-pressure side outlet of condenser/evaporator (9) links to each other by pipeline with the low-pressure fluid inlet of first injector (4), and the outlet of first injector (4) links to each other by pipeline with the low-pressure side inlet of first regenerator (5); The low-pressure side outlet of first regenerator (5) links to each other by pipeline with the air-breathing inlet of compressor (1).
2. the cryogenic refrigerating unit that has automatic cascade according to claim 1, it is characterized in that: the annexation of described cryogenic refrigerating unit or do not comprise second injector (8) and second gas-liquid separator (6), the high-pressure side outlet of first regenerator this moment (5) directly with after first throttle spare (7) is connected by pipeline links to each other with the low-pressure side inlet of condenser/evaporator (9) again, the low-pressure side outlet of condenser/evaporator (9) directly links to each other by pipeline with the low-pressure side inlet of first regenerator (5), and other annexation is identical with described cryogenic refrigerating unit annexation.
3. the cryogenic refrigerating unit that has automatic cascade as claimed in claim 1 or 2, it is characterized in that: the employed cold-producing medium of cryogenic refrigerating unit or mix the binary non-azeotropic mixed working medium of forming, or ternary or the above non-azeotropic mixed working medium of ternary formed by higher boiling working medium component, low boiling working fluid component and the mixing of ultralow boiling point working medium component by higher boiling working medium component and low boiling working fluid component.
4. as having the cryogenic refrigerating unit of automatic cascade as described in the claim 3, it is characterized in that: higher boiling working medium component or R600a, or R152a, or R134a, or R22, or R290, or R1270, or R32, or R143a, or R125.
5. as having the cryogenic refrigerating unit of automatic cascade as described in the claim 3, it is characterized in that: low boiling working fluid component or R23, or R13, or go up R170.
6. as having the cryogenic refrigerating unit of automatic cascade as described in the claim 3, it is characterized in that: ultralow boiling point working medium component or R728, or R50, or R14, or R1150.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206276366U CN201866980U (en) | 2010-11-27 | 2010-11-27 | Auto-cascade low-temperature refrigerating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206276366U CN201866980U (en) | 2010-11-27 | 2010-11-27 | Auto-cascade low-temperature refrigerating device |
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| CN201866980U true CN201866980U (en) | 2011-06-15 |
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| CN2010206276366U Expired - Fee Related CN201866980U (en) | 2010-11-27 | 2010-11-27 | Auto-cascade low-temperature refrigerating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822392A (en) * | 2014-03-02 | 2014-05-28 | 上海海洋大学 | Marine energy-saving auto-cascade refrigeration system |
| CN108204690A (en) * | 2017-10-08 | 2018-06-26 | 江涛 | A kind of quasi- overlapping air source heat pump system of single compressor |
| CN108413637A (en) * | 2018-02-28 | 2018-08-17 | 中国科学院力学研究所 | A kind of industrial smoke waste heat recovery and dehumidification system |
-
2010
- 2010-11-27 CN CN2010206276366U patent/CN201866980U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822392A (en) * | 2014-03-02 | 2014-05-28 | 上海海洋大学 | Marine energy-saving auto-cascade refrigeration system |
| CN108204690A (en) * | 2017-10-08 | 2018-06-26 | 江涛 | A kind of quasi- overlapping air source heat pump system of single compressor |
| CN108204690B (en) * | 2017-10-08 | 2023-04-28 | 江涛 | Single-compressor quasi-cascade air source heat pump system |
| CN108413637A (en) * | 2018-02-28 | 2018-08-17 | 中国科学院力学研究所 | A kind of industrial smoke waste heat recovery and dehumidification system |
| CN108413637B (en) * | 2018-02-28 | 2019-02-26 | 中国科学院力学研究所 | A kind of recycling of industrial smoke waste heat and dehumidification system |
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Granted publication date: 20110615 Termination date: 20111127 |