CN103925728A - Single-compressor auto-cascade refrigeration system - Google Patents
Single-compressor auto-cascade refrigeration system Download PDFInfo
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Abstract
The invention discloses a single-compressor auto-cascade refrigeration system which comprises a compressor, a condenser, a dry filter and a regenerator. The gas discharge end of the compressor is communicated with the condenser through a high-temperature exhaust pipe. The condenser is communicated with the dry filter. The regenerator is communicated with the gas return end of the compressor. The single-compressor auto-cascade refrigeration system comprises multiple stages of evaporator condensers, the first evaporator condenser is communicated with the dry filter through a pipeline which penetrates the regenerator, the multiple stages of evaporator condensers are communicated with one another through corresponding gas return branches, each stage of evaporator condenser is provided with a corresponding gas-liquid separator, the corresponding gas-liquid separators are used for leading liquid refrigerants into the corresponding evaporator condensers, and gaseous refrigerants in the gas-liquid separator are gathered into gas return main pipelines. The last evaporator condenser is communicated with an evaporator through the corresponding gas return main pipeline, and the evaporator is communicated with an expansion tank. System running statuses of an initial cooling phase and a final cooling phase are optimized.
Description
Technical field
The present invention relates to a kind of single compressor auto-cascading refrigeration system.
Background technology
The refrigeration warm area of Using Mixed Refrigerants can be connected common cold warm area and deep cooling warm area, and owing to adopting, the Linde cycle system pressure of simple working medium is higher, and system thermal efficiency is lower.
Adopt can keeping under the prerequisite of higher running efficiency of system from cascade refrigerator of multicomponent mixture work medium, long-time stable operation, had obtained tremendous development from folding refrigeration technique in recent years.But in prior art, conventionally there is such problem, in the time that refrigeration target temperature is lower, because needs adopt the more much higher first mixed working fluid of low boiling concentration, start temperature-fall period at refrigeration machine, mixed working fluid is bigger than normal by the gas phase ratio of restricting element, flow is little, make the pressure at expulsion of compressor too high, pressure of inspiration(Pi) is too low, thereby cause pressure ratio and the excessive discharge temperature of compressor, the life-span of compressor will greatly be reduced and even caused compressor can not start shooting because of pressure protect, be difficult to realize compressor in the pressure ratio that starts temperature-fall period, delivery temperature and the dynamic operational behaviour that improves cold-producing medium.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, a kind of single compressor auto-cascading refrigeration system provided by the invention, to improve compressor service life, optimizes the system running state that starts temperature-fall period and cooling terminal stage.
For solving the problems of the technologies described above, the present invention program comprises:
A kind of single compressor auto-cascading refrigeration system, it comprises compressor, condenser, device for drying and filtering and regenerator, the outlet side of compressor is connected with condenser by high-temperature exhaust pipe, condenser is connected with device for drying and filtering, regenerator is connected with described compressor return air end, and wherein, described single compressor auto-cascading refrigeration system comprises multi-stage condensing evaporimeter, the first condenser/evaporator is connected with device for drying and filtering by pipeline, and this pipeline is through regenerator; Between multi-stage condensing evaporimeter, be connected by corresponding return-air branch road, every grade of condenser/evaporator disposes corresponding gas-liquid separator, corresponding gas-liquid separator is for liquid refrigerant is imported in corresponding condenser/evaporator, and the gaseous refrigerant in gas-liquid separator imports in the total road of return-air; The condenser/evaporator of position, end is connected with evaporimeter by the total road of return-air, and evaporimeter is connected with an expansion drum.
Described single compressor auto-cascading refrigeration system, wherein, described single compressor auto-cascading refrigeration system comprises Pyatyi condenser/evaporator, above-mentioned device for drying and filtering is connected with the first gas-liquid separator by the first pipeline, the first pipeline is through above-mentioned regenerator, first order condenser/evaporator is connected with regenerator by the first return-air branch road, the liquid refrigerant line of the first gas-liquid separator is connected with first order condenser/evaporator, and the gaseous refrigerant pipeline of the first gas-liquid separator is connected with the second gas-liquid separator through first order condenser/evaporator; The liquid refrigerant line of the second gas-liquid separator is connected with second level condenser/evaporator, the gaseous refrigerant pipeline of the second gas-liquid separator is connected with the 3rd gas-liquid separator through second level condenser/evaporator, and first order condenser/evaporator is connected by the second return-air branch road with second level condenser/evaporator; The liquid refrigerant line of the 3rd gas-liquid separator is connected with third level condenser/evaporator, the gaseous refrigerant pipeline of the 3rd gas-liquid separator is connected with the 4th gas-liquid separator through third level condenser/evaporator, and second level condenser/evaporator is connected by the 3rd return-air branch road with third level condenser/evaporator; The liquid refrigerant line of the 4th gas-liquid separator is connected with fourth stage condenser/evaporator, the gaseous refrigerant pipeline of the 4th gas-liquid separator is connected with the total road of above-mentioned return-air through fourth stage condenser/evaporator, level V condenser/evaporator, and third level condenser/evaporator is connected by the 4th return-air branch road with fourth stage condenser/evaporator; Fourth stage condenser/evaporator is connected by the 5th return-air branch road with level V condenser/evaporator, and level V condenser/evaporator is connected with above-mentioned evaporimeter by the total road of above-mentioned return-air.
Described single compressor auto-cascading refrigeration system, wherein, on the liquid refrigerant line of the liquid refrigerant line of the liquid refrigerant line of the liquid refrigerant line of the first gas-liquid separator, the second gas-liquid separator, the 3rd gas-liquid separator, the 4th gas-liquid separator and the total road of above-mentioned return-air, be provided with the first by-pass valve control.
Described single compressor auto-cascading refrigeration system, wherein, described single compressor auto-cascading refrigeration system comprises three grades of condenser/evaporators, above-mentioned device for drying and filtering is connected with the 6th gas-liquid separator by the second pipeline, the second pipeline is through above-mentioned regenerator, the 6th grade of condenser/evaporator is connected with regenerator by the 6th return-air branch road, the liquid refrigerant line of the 6th gas-liquid separator is connected with the 6th grade of condenser/evaporator, and the gaseous refrigerant pipeline of the 6th gas-liquid separator is connected with the 7th gas-liquid separator through the 6th grade of condenser/evaporator; The liquid refrigerant line of the 7th gas-liquid separator is connected with the 7th grade of condenser/evaporator, the gaseous refrigerant pipeline of the 7th gas-liquid separator is connected with the 8th gas-liquid separator through the 7th grade of condenser/evaporator, and the 6th grade of condenser/evaporator is connected by the 7th return-air branch road with the 7th grade of condenser/evaporator; The liquid refrigerant line of the 8th gas-liquid separator is connected with the 8th grade of condenser/evaporator, the gaseous refrigerant pipeline of the 8th gas-liquid separator is connected with the total road of above-mentioned return-air through the 8th grade of condenser/evaporator, the 7th grade of condenser/evaporator is connected by the 8th return-air branch road with the 8th grade of condenser/evaporator, and the 8th grade of condenser/evaporator is connected with above-mentioned evaporimeter by the total road of above-mentioned return-air.
Described single compressor auto-cascading refrigeration system, wherein, on the liquid refrigerant line of the liquid refrigerant line of the liquid refrigerant line of the 6th gas-liquid separator, the 7th gas-liquid separator, the 8th gas-liquid separator and the total road of above-mentioned return-air, be provided with the second by-pass valve control.
Described single compressor auto-cascading refrigeration system, wherein, above-mentioned cold-producing medium comprises the first cold-producing medium, second refrigerant and the 3rd cold-producing medium, it according to weight half proportion by subtraction is: the R23 of the R134a that the first cold-producing medium is 40%-55% or the R600a of 25%-45% and 20%-35%, second refrigerant is the R740 that the R14 of 25%-35% and 50, the three cold-producing mediums of 1%-5%R are 5%-15%.
A kind of single compressor auto-cascading refrigeration system provided by the invention, adopt a compressor to drive multi-stage condensing evaporimeter, after single compressor energising, mix refrigerant is through condenser, device for drying and filtering, Fen Si road enters regenerator cooling, after cooling, be condensed into downward liquid flow according to refrigerant property, all the other mix refrigerants are dissolved as gaseous state according to refrigerant property and upwards walk, lower partially liq is through filter, after pipeline, enter corresponding condenser/evaporator, temperature reduces, the gaseous state mix refrigerant of upper part is through after the condenser/evaporator of lowering the temperature, some refrigerant condenses becomes liquid to enter next corresponding condenser/evaporator again, all the other mix refrigerant gases of upper part have again part cold-producing medium to become liquid through the corresponding condenser/evaporator cooling of the next one, the like, finally can make the temperature inside the box be down to-150 DEG C, thereby obviously reduce compressor in the pressure ratio that starts temperature-fall period, delivery temperature and the running status of improving refrigeration system, the thermodynamic efficiency of synchronous lower cryogenic temperature and lifting refrigeration system, improve compressor service life, optimize the system running state that starts temperature-fall period and cooling terminal stage.
Brief description of the drawings
Fig. 1 is Pyatyi single compressor auto-cascading refrigeration system in the present invention;
Fig. 2 is three grades of single compressor auto-cascading refrigeration systems in the present invention.
Detailed description of the invention
The invention provides a kind of single compressor auto-cascading refrigeration system, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of single compressor auto-cascading refrigeration system, it comprises compressor 1, condenser 2, device for drying and filtering 3 and regenerator 4, the outlet side of compressor 1 is connected with condenser 2 by high-temperature exhaust pipe 5, condenser 2 is connected with device for drying and filtering 3, regenerator 4 is connected with described compressor 1 air return end, wherein, described single compressor auto-cascading refrigeration system comprises multi-stage condensing evaporimeter, the first condenser/evaporator is connected with device for drying and filtering 3 by pipeline, and this pipeline is through regenerator 4; Between multi-stage condensing evaporimeter, be connected by corresponding return-air branch road, every grade of condenser/evaporator disposes corresponding gas-liquid separator, corresponding gas-liquid separator is for liquid refrigerant is imported in corresponding condenser/evaporator, and the gaseous refrigerant in gas-liquid separator imports in the total road 7 of return-air; The condenser/evaporator of position, end is connected with evaporimeter 8 by the total road 7 of return-air, and evaporimeter 8 is connected with expansion drum 6, only has in the time of single compressor auto-cascading refrigeration system internal pressure superpressure, and gaseous refrigerant just enters in expansion drum 6.By the technical scheme of multi-stage condensing evaporimeter, obviously having reduced compressor is starting pressure ratio, the delivery temperature of temperature-fall period and is improving the running status of refrigeration system, the thermodynamic efficiency of synchronous lower cryogenic temperature and lifting refrigeration system, improve compressor service life, optimized the system running state that starts temperature-fall period and cooling terminal stage.
In preferred embodiment of the present invention, as shown in Figure 1, adopt Pyatyi condenser/evaporator, it is the conceited cascade refrigeration system of level Four fractional condensation Pyatyi, described single compressor auto-cascading refrigeration system comprises Pyatyi condenser/evaporator, above-mentioned device for drying and filtering 3 is connected with the first gas-liquid separator 11 by the first pipeline 10, the first pipeline 10 is through above-mentioned regenerator 4, first order condenser/evaporator 12 is connected with regenerator 4 by the first return-air branch road 13, the liquid refrigerant line 14 of the first gas-liquid separator 11 is connected with first order condenser/evaporator 12, the gaseous refrigerant pipeline 15 of the first gas-liquid separator 11 is connected with the second gas-liquid separator 16 through first order condenser/evaporator 12, the liquid refrigerant line 17 of the second gas-liquid separator 16 is connected with second level condenser/evaporator 18, the gaseous refrigerant pipeline 19 of the second gas-liquid separator 16 is connected with the 3rd gas-liquid separator 9 through second level condenser/evaporator 18, and first order condenser/evaporator 12 is connected by the second return-air branch road 20 with second level condenser/evaporator 18, the liquid refrigerant line 21 of the 3rd gas-liquid separator 9 is connected with third level condenser/evaporator 22, the gaseous refrigerant pipeline 23 of the 3rd gas-liquid separator 9 is connected with the 4th gas-liquid separator 24 through third level condenser/evaporator 22, and second level condenser/evaporator 18 is connected by the 3rd return-air branch road 25 with third level condenser/evaporator 22, the liquid refrigerant line 26 of the 4th gas-liquid separator 24 is connected with fourth stage condenser/evaporator 27, the gaseous refrigerant pipeline 28 of the 4th gas-liquid separator 24 is connected with the total road 7 of above-mentioned return-air through fourth stage condenser/evaporator 27, level V condenser/evaporator 29, and third level condenser/evaporator 22 is connected by the 4th return-air branch road 30 with fourth stage condenser/evaporator 27, fourth stage condenser/evaporator 27 is connected by the 5th return-air branch road 31 with level V condenser/evaporator 29, and level V condenser/evaporator 29 is connected with above-mentioned evaporimeter 8 by the total road 7 of above-mentioned return-air, and evaporimeter 8 is connected with expansion drum 6.
Further, on the liquid refrigerant line 26 of the liquid refrigerant line 23 of the liquid refrigerant line 17 of the liquid refrigerant line 14 of the first gas-liquid separator 11, the second gas-liquid separator 16, the 3rd gas-liquid separator 9, the 4th gas-liquid separator 24 and the total road 7 of above-mentioned return-air, be provided with the first by-pass valve control 32.
Mix refrigerant enters condenser 2 from compressor 1 and lowers the temperature, filter through device for drying and filtering 3 again, enter the first gas-liquid separator 11 by regenerator 4, R134a or R600a precipitation becomes liquid and enters first order condenser/evaporator 12 by liquid refrigerant line 14 evaporations and realize refrigerating function, all the other mix refrigerants that do not liquefy pass first order condenser/evaporator 12 by gaseous refrigerant pipeline 15, realize all the other condensations, enter again the second gas-liquid separator 16, R23 condensation of refrigerant becomes liquid precipitation, through gaseous refrigerant pipeline, 19 evaporations enter in second level condenser/evaporator 18, realize cold-producing medium function, all the other not liquefied refrigerant enter the 3rd gas-liquid separator 9 by gaseous refrigerant pipeline 19, now R14 condensation of refrigerant liquefaction precipitation, enter third level condenser/evaporator 22 through liquid refrigerant line 21 evaporations and realize refrigerating function, all the other not liquefied refrigerant enter the 4th gas-liquid separator 24 by gaseous refrigerant pipeline 23 through third level condenser/evaporator 22, R50 condensation of refrigerant becomes liquid precipitation to enter level V condenser/evaporator 29 by liquid refrigerant line 26 to realize refrigerating function, all the other not liquefied refrigerant enter evaporimeter 8 by gaseous refrigerant pipeline 28 through fourth stage condenser/evaporator 27 and level V condenser/evaporator 29 and freeze.After ownership cryogen refrigeration function completes, all get back to and in compressor 1, continue again circulation by the total road 7 of return-air and the 5th return-air branch road 31, the 4th return-air branch road 30, the 3rd return-air branch road 25, the second return-air branch road 20, the first return-air branch road 13 successively.In the time that pressure controller 33 detects that system pressure is too high, electromagnetic expanding valve 34 moves, and part mix refrigerant enters expansion drum 6 through electromagnetic expanding valve 34, then gets back to system relaying reforwarding row by the total road 7 of return-air and circulate.
In another preferred embodiment of the present invention, as shown in Figure 2, described single compressor auto-cascading refrigeration system comprises three grades of condenser/evaporators, i.e. three grades of conceited cascade refrigeration systems of fractional condensation level Four, above-mentioned device for drying and filtering 3 is connected with the 6th gas-liquid separator 36 by the second pipeline 35, the second pipeline 35 is through above-mentioned regenerator 4, the 6th grade of condenser/evaporator 37 is connected with regenerator 4 by the 6th return-air branch road 38, the liquid refrigerant line 39 of the 6th gas-liquid separator 36 is connected with the 6th grade of condenser/evaporator 37, the gaseous refrigerant pipeline 40 of the 6th gas-liquid separator 36 is connected with the 7th gas-liquid separator 41 through the 6th grade of condenser/evaporator 37, the liquid refrigerant line 42 of the 7th gas-liquid separator 41 is connected with the 7th grade of condenser/evaporator 43, the gaseous refrigerant pipeline 44 of the 7th gas-liquid separator 41 is connected with the 8th gas-liquid separator 45 through the 7th grade of condenser/evaporator 43, and the 6th grade of condenser/evaporator 37 is connected by the 7th return-air branch road 46 with the 7th grade of condenser/evaporator 43, the liquid refrigerant line 47 of the 8th gas-liquid separator 45 is connected with the 8th grade of condenser/evaporator 48, the gaseous refrigerant pipeline 49 of the 8th gas-liquid separator 45 is connected with the total road 7 of above-mentioned return-air through the 8th grade of condenser/evaporator 48, the 7th grade of condenser/evaporator 43 is connected by the 8th return-air branch road 50 with the 8th grade of condenser/evaporator 48, the 8th grade of condenser/evaporator 48 is connected with above-mentioned evaporimeter 8 by the total road 7 of above-mentioned return-air, and evaporimeter 8 is connected with expansion drum 6.
Further, on the liquid refrigerant line 47 of the liquid refrigerant line 39 of the 6th gas-liquid separator 36, the liquid refrigerant line 42 of the 7th gas-liquid separator 41, the 8th gas-liquid separator 45 and the total road 7 of above-mentioned return-air, be provided with the second by-pass valve control 51, further improved the control to single compressor auto-cascading refrigeration system.
Mix refrigerant enters condenser 2 from compressor 1 and lowers the temperature, filter through device for drying and filtering 3 again, enter the 6th gas-liquid separator 36 by regenerator 4, R134a/R600a liquid precipitation enters the 6th grade of condenser/evaporator 37 by liquid refrigerant line 39 evaporations and realizes refrigerating function.All the other mix refrigerants due to be gas cannot precipitate through by gaseous refrigerant pipeline 40 through the 6th grade of condenser/evaporator 37, realize all the other condensations, enter again the 7th gas-liquid separator 41, R23 condensation of refrigerant becomes liquid precipitation, through liquid refrigerant line, 42 evaporations enter in the 7th grade of condenser/evaporator 43, realize cold-producing medium function, all the other not the gaseous refrigerant pipeline 44 of liquefied refrigerant by the 7th gas-liquid separator 41 enter the 8th gas-liquid separator 45 through the 7th grade of condenser/evaporator 43, now R14 condensation of refrigerant liquefaction precipitation, enter the 8th grade of condenser/evaporator 48 through liquid refrigerant line 47 evaporations and realize refrigerating function, all the other not liquefied refrigerant enter evaporimeter 8 by gaseous refrigerant pipeline 49 through the 8th grade of condenser/evaporator 48 and freeze.After ownership cryogen refrigeration function completes, all get back to and in compressor 1, continue again circulation by the total road 7 of return-air and the 8th return-air branch road 50, the 7th return-air branch road 46, the 6th return-air branch road 38 successively.In the time that pressure controller 33 detects that system pressure is too high, electromagnetic expanding valve 34 moves, and part mix refrigerant enters expansion drum 6 through electromagnetic expanding valve 34, then gets back to system relaying reforwarding row by the total road 7 of return-air and circulate.
And more preferably, above-mentioned cold-producing medium comprises the first cold-producing medium, second refrigerant and the 3rd cold-producing medium, it according to weight half proportion by subtraction is: the R23 of the R134a that the first cold-producing medium is 40%-55% or the R600a of 25%-45% and 20%-35%, second refrigerant is the R740 that the R14 of 25%-35% and 50, the three cold-producing mediums of 1%-5%R are 5%-15%.
Certainly; more than explanation is only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this description; that makes is allly equal to alternative, obvious form of distortion, within all dropping on the essential scope of this description, ought to be subject to protection of the present invention.
Claims (6)
1. a single compressor auto-cascading refrigeration system, it comprises compressor, condenser, device for drying and filtering and regenerator, the outlet side of compressor is connected with condenser by high-temperature exhaust pipe, condenser is connected with device for drying and filtering, regenerator is connected with described compressor return air end, it is characterized in that, described single compressor auto-cascading refrigeration system comprises multi-stage condensing evaporimeter, the first condenser/evaporator is connected with device for drying and filtering by pipeline, and this pipeline is through regenerator; Between multi-stage condensing evaporimeter, be connected by corresponding return-air branch road, every grade of condenser/evaporator disposes corresponding gas-liquid separator, corresponding gas-liquid separator is for liquid refrigerant is imported in corresponding condenser/evaporator, and the gaseous refrigerant in gas-liquid separator imports in the total road of return-air; The condenser/evaporator of position, end is connected with evaporimeter by the total road of return-air, and evaporimeter is connected with an expansion drum.
2. single compressor auto-cascading refrigeration system according to claim 1, it is characterized in that, described single compressor auto-cascading refrigeration system comprises Pyatyi condenser/evaporator, above-mentioned device for drying and filtering is connected with the first gas-liquid separator by the first pipeline, the first pipeline is through above-mentioned regenerator, first order condenser/evaporator is connected with regenerator by the first return-air branch road, the liquid refrigerant line of the first gas-liquid separator is connected with first order condenser/evaporator, the gaseous refrigerant pipeline of the first gas-liquid separator is connected with the second gas-liquid separator through first order condenser/evaporator, the liquid refrigerant line of the second gas-liquid separator is connected with second level condenser/evaporator, the gaseous refrigerant pipeline of the second gas-liquid separator is connected with the 3rd gas-liquid separator through second level condenser/evaporator, and first order condenser/evaporator is connected by the second return-air branch road with second level condenser/evaporator, the liquid refrigerant line of the 3rd gas-liquid separator is connected with third level condenser/evaporator, the gaseous refrigerant pipeline of the 3rd gas-liquid separator is connected with the 4th gas-liquid separator through third level condenser/evaporator, and second level condenser/evaporator is connected by the 3rd return-air branch road with third level condenser/evaporator, the liquid refrigerant line of the 4th gas-liquid separator is connected with fourth stage condenser/evaporator, the gaseous refrigerant pipeline of the 4th gas-liquid separator is connected with the total road of above-mentioned return-air through fourth stage condenser/evaporator, level V condenser/evaporator, and third level condenser/evaporator is connected by the 4th return-air branch road with fourth stage condenser/evaporator, fourth stage condenser/evaporator is connected by the 5th return-air branch road with level V condenser/evaporator, and level V condenser/evaporator is connected with above-mentioned evaporimeter by the total road of above-mentioned return-air.
3. single compressor auto-cascading refrigeration system according to claim 2, it is characterized in that, on the liquid refrigerant line of the liquid refrigerant line of the first gas-liquid separator, the liquid refrigerant line of the second gas-liquid separator, the 3rd gas-liquid separator, the liquid refrigerant line of the 4th gas-liquid separator and the total road of above-mentioned return-air, be provided with the first by-pass valve control.
4. single compressor auto-cascading refrigeration system according to claim 1, it is characterized in that, described single compressor auto-cascading refrigeration system comprises three grades of condenser/evaporators, above-mentioned device for drying and filtering is connected with the 6th gas-liquid separator by the second pipeline, the second pipeline is through above-mentioned regenerator, the 6th grade of condenser/evaporator is connected with regenerator by the 6th return-air branch road, the liquid refrigerant line of the 6th gas-liquid separator is connected with the 6th grade of condenser/evaporator, the gaseous refrigerant pipeline of the 6th gas-liquid separator is connected with the 7th gas-liquid separator through the 6th grade of condenser/evaporator, the liquid refrigerant line of the 7th gas-liquid separator is connected with the 7th grade of condenser/evaporator, the gaseous refrigerant pipeline of the 7th gas-liquid separator is connected with the 8th gas-liquid separator through the 7th grade of condenser/evaporator, and the 6th grade of condenser/evaporator is connected by the 7th return-air branch road with the 7th grade of condenser/evaporator, the liquid refrigerant line of the 8th gas-liquid separator is connected with the 8th grade of condenser/evaporator, the gaseous refrigerant pipeline of the 8th gas-liquid separator is connected with the total road of above-mentioned return-air through the 8th grade of condenser/evaporator, the 7th grade of condenser/evaporator is connected by the 8th return-air branch road with the 8th grade of condenser/evaporator, and the 8th grade of condenser/evaporator is connected with above-mentioned evaporimeter by the total road of above-mentioned return-air.
5. single compressor auto-cascading refrigeration system according to claim 2, it is characterized in that, on the liquid refrigerant line of the liquid refrigerant line of the 6th gas-liquid separator, the liquid refrigerant line of the 7th gas-liquid separator, the 8th gas-liquid separator and the total road of above-mentioned return-air, be provided with the second by-pass valve control.
6. single compressor auto-cascading refrigeration system according to claim 1, it is characterized in that, above-mentioned cold-producing medium comprises the first cold-producing medium, second refrigerant and the 3rd cold-producing medium, it according to weight half proportion by subtraction is: the R23 of the R134a that the first cold-producing medium is 40%-55% or the R600a of 25%-45% and 20%-35%, second refrigerant is the R740 that the R14 of 25%-35% and 50, the three cold-producing mediums of 1%-5%R are 5%-15%.
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Cited By (3)
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| CN109405326A (en) * | 2018-12-26 | 2019-03-01 | 上海导向医疗系统有限公司 | Pre-cooler and cold therapy system for cryoablation |
| CN109737621A (en) * | 2018-12-05 | 2019-05-10 | 江苏白雪电器股份有限公司 | Auto-cascading refrigeration system |
| CN115523671A (en) * | 2021-06-25 | 2022-12-27 | 青岛海尔生物医疗股份有限公司 | Self-cascade refrigeration system and low-temperature cabinet |
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| CN101504209A (en) * | 2004-01-07 | 2009-08-12 | 新明和工业株式会社 | Ultra-low temperature freezer, refrigeration system and vacuum apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109737621A (en) * | 2018-12-05 | 2019-05-10 | 江苏白雪电器股份有限公司 | Auto-cascading refrigeration system |
| CN109737621B (en) * | 2018-12-05 | 2021-03-19 | 江苏白雪电器股份有限公司 | Self-cascade refrigeration system |
| CN109405326A (en) * | 2018-12-26 | 2019-03-01 | 上海导向医疗系统有限公司 | Pre-cooler and cold therapy system for cryoablation |
| CN109405326B (en) * | 2018-12-26 | 2023-11-07 | 上海导向医疗系统有限公司 | Precooling device for cryoablation and cryotherapy system |
| CN115523671A (en) * | 2021-06-25 | 2022-12-27 | 青岛海尔生物医疗股份有限公司 | Self-cascade refrigeration system and low-temperature cabinet |
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Application publication date: 20140716 |