CN205079493U - Two -stage overlapping formula cryogenic refrigeration system - Google Patents
Two -stage overlapping formula cryogenic refrigeration system Download PDFInfo
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- CN205079493U CN205079493U CN201520850071.0U CN201520850071U CN205079493U CN 205079493 U CN205079493 U CN 205079493U CN 201520850071 U CN201520850071 U CN 201520850071U CN 205079493 U CN205079493 U CN 205079493U
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Abstract
The utility model relates to a two -stage overlapping formula cryogenic refrigeration system, include: low temperature level refrigeration cycle return circuit and high temperature level refrigeration cycle return circuit, low temperature level refrigeration cycle return circuit and doublestage condenser of high temperature level refrigeration cycle return circuit sharing and a middle heat exchanger, the doublestage condenser includes high temperature level and low temperature level, and the high temperature level of doublestage condenser inserts high temperature level refrigeration cycle return circuit, and the low temperature level of doublestage condenser inserts low temperature level refrigeration cycle return circuit, middle heat exchanger includes high temperature level and low temperature level, and the high temperature level of middle heat exchanger inserts high temperature level refrigeration cycle return circuit, and the low temperature level of middle heat exchanger inserts low temperature level refrigeration cycle return circuit. The utility model has the advantages of the refrigerant fills fluence control easily, easy maintenance, easy - 86 DEG C of low temperature, system operating stability realized are good under two kinds of refrigerants of R404AR23, belong to refrigerating system technical field.
Description
Technical field
The utility model relates to a kind of refrigeration system, specifically, relates to a kind of two-stage superposition type cryogenic refrigerating system.
Background technology
In recent years, in fields such as low-temperature biological preservation, cryogenic medicine, freeze drying and gas liquefactions, the normal low temperature needed lower than less than-60 DEG C.For solving the refrigeration problem of less than-60 DEG C, normal employing multicomponent mixture work medium cooling cycle system, comprises classical cascade system and Autocascades system.In the circulation of nature folding type cooling system, multiple cold-producing medium is separated voluntarily by gas-liquid separator, realizes overlapping between higher boiling cold-producing medium and low boiling point refrigerant, obtains lower evaporating temperature.But this system exists serious problems, namely the stability of a system is poor, once some pipeline in system leaks, be difficult to the working medium amount of leaking in judgement system, meanwhile, maintenance sites is difficult to obtain suitable cold-producing medium ratio, causes very large difficulty to maintenance; Meanwhile, in Autocascades system, be difficult to use R404A/R23 two kinds of cold-producing mediums to realize-86 DEG C of low temperature.Due to the preciousness of medical specimen, do not allow to occur any problem in preservation process, this proposes more strict requirement to the stability of cryogenic system.
Utility model content
For the technical problem existed in prior art, the purpose of this utility model is: provide a kind of and easily can realize the low temperature of-86 DEG C and easy to maintenance, the two-stage superposition type cryogenic refrigerating system of good stability.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of two-stage superposition type cryogenic refrigerating system, comprising: low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop; Low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop share a two-stage condensation device and an Intermediate Heat Exchanger; Two-stage condensation device comprises high-temperature level and low-temperature level, the high-temperature level access high-temperature level refrigeration cycle loop of two-stage condensation device, the low-temperature level access low-temperature level refrigeration cycle loop of two-stage condensation device; Intermediate Heat Exchanger comprises high-temperature level and low-temperature level, the high-temperature level access high-temperature level refrigeration cycle loop of Intermediate Heat Exchanger, the low-temperature level access low-temperature level refrigeration cycle loop of Intermediate Heat Exchanger.The cryogenic temperature in the high-temperature level refrigeration cycle loop in the utility model is higher than low-temperature level refrigeration cycle loop, and both Yin Wendu relatively height name, but not definitely high temperature or definitely low temperature.
Preferred as one, high-temperature level refrigeration cycle loop comprises: the first compressor, the first oil eliminator, the first device for drying and filtering, the first regenerator, first throttle device; Wherein the first regenerator has four interfaces, is high-pressure side entrance, high-pressure side outlet, the outlet of low-pressure end entrance, low-pressure end respectively; Along the flow direction of cold-producing medium, the high-temperature level of the first compressor, the first oil eliminator, two-stage condensation device, the first device for drying and filtering, the high-pressure side entrance of the first regenerator, the high-pressure side outlet of the first regenerator, the high-temperature level of first throttle device, Intermediate Heat Exchanger, the low-pressure end entrance of the first regenerator connect successively, and the low-pressure end outlet of the first regenerator connects with the first compressor again; Low-temperature level refrigeration cycle loop comprises: the second compressor, the second oil eliminator, the second device for drying and filtering, the second regenerator, the second throttling arrangement, evaporimeter; Wherein the second regenerator has four interfaces, is high-pressure side entrance, high-pressure side outlet, the outlet of low-pressure end entrance, low-pressure end respectively; Along the flow direction of cold-producing medium, the low-temperature level of the second compressor, two-stage condensation device, the second oil eliminator, the low-temperature level of Intermediate Heat Exchanger, the second device for drying and filtering, the high-pressure side entrance of the second regenerator, the high-pressure side outlet of the second regenerator, the low-pressure end entrance of the second throttling arrangement, evaporimeter, the second regenerator connect successively, and the low-pressure end outlet of the second regenerator connects with the second compressor again.
Preferred as one, high-temperature level refrigeration cycle loop is R404A refrigeration cycle; Low-temperature level refrigeration cycle loop is R23 refrigeration cycle.
Preferred as one, two-stage condensation device is copper pipe fin type two-stage condensation device, and high-temperature level and low-temperature level realize independent operating by independent entry and exit.
Preferred as one, a kind of two-stage superposition type cryogenic refrigerating system, is arranged in refrigerator.
Preferred as one, refrigerator is dischargeable capacity is 500 refrigerators rising to 600 liters; Evaporimeter is the wire-and-tube evaporator of internal diameter 5 to 8 millimeters, heat exchange area 0.8 to 1.2 square metres; Intermediate Heat Exchanger is the double pipe heat exchanger of 2 to 5 kilowatts of heat exchange amounts, or is the plate type heat exchanger of 2 to 5 kilowatts of heat exchange amounts; First compressor is the compressor of 28 to 36 milliliters of capacities; Second compressor is the compressor of 25 to 33 milliliters of capacities; First throttle device is the heating power expansion valve of 1.5 to 2.5 kilowatts of refrigerating capacitys, or is the capillary of internal diameter 1.5 millimeters, length 1000 to 2000 millimeters; Second throttling arrangement is the heating power expansion valve of 0.7 to 1.5 kilowatts of refrigerating capacitys, or is the capillary of internal diameter 1.5 millimeters, length 4000 to 5000 millimeters.
Preferred as one, first throttle device is heating power expansion valve or capillary.Second throttling arrangement is heating power expansion valve or capillary.
Generally speaking, the utility model tool has the following advantages:
1. the high-temperature level of two-stage condensation device and low-temperature level are simultaneously to the refrigerant loses heat in high and low temperature refrigeration cycle, wherein low-temperature level carries out precooling to the high-temperature high-pressure refrigerant of the second exhaust outlet of compressor, reduce the thermic load of Intermediate Heat Exchanger, improve the efficiency of the second oil eliminator simultaneously.
2. realize the excessively cold of cold-producing medium by the first regenerator and the second regenerator, make 500 to 600 to rise refrigerator and realize-86 DEG C of low temperature under R404A/R23 two kinds of cold-producing mediums.
3. low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop independent operating, without the need to gas-liquid separator, refrigerant charge easily controls, and significantly improves the stability of system.
4. the parameter configuration of whole system, adds the collocation of two kinds of cold-producing mediums, and enable system under R404A/R23 two kinds of cold-producing mediums, realize the low temperature of-86 DEG C, compare the cascade system of multicomponent mixture work medium, this system run all right is good.
5. can increase, subtract refrigerant charge according to high/low temperature level normal operating pressure during system maintenance, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of two-stage superposition type cryogenic refrigerating system.
Fig. 2 is the structural representation of evaporimeter in refrigerator.
Fig. 3 is the 3D solid figure of evaporimeter.
Wherein, 1 to be the first compressor, 2 be the first oil eliminator, 3 be first throttle device for two-stage condensation device, 4 be the first device for drying and filtering, 5 is the first regenerator, 6,7 for Intermediate Heat Exchanger, 8 be the second device for drying and filtering, 9 to be the second regenerator, 10 be the second throttling arrangement, 11 be the second compressor for evaporimeter, 12 is the second oil eliminator, 13.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
Embodiment one
A kind of two-stage superposition type cryogenic refrigerating system comprises: low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop, two-stage refrigeration cycle shares two-stage condensation device and Intermediate Heat Exchanger.By two-stage condensation device, just cooling is carried out to R404A and the R23 high temperature and high pressure gas injected in it, reduce Intermediate Heat Exchanger load; By high/low temperature system capillary be wound around high/low temperature refrigeration system muffler can realize the cooling of cold-producing medium R404A and cold-producing medium R23 excessively cold, the load and the R23 that reduce high temperature compressor reach negative evaporating pressure in capillary after throttling, easily in casing, realize-86 DEG C of low temperature.The isolated operation of high and low temperature cooling cycle system, according to unit normal operating pressure filling cold-producing medium during maintenance, easily realizes the stable operation of unit.Two-stage condensation device, Intermediate Heat Exchanger include high-temperature level and low-temperature level.First regenerator, the second regenerator include high-pressure side entrance, high-pressure side outlet, low-pressure end entrance and low-pressure end outlet.
High-temperature level refrigeration cycle loop is: the first compressor exhaust pipe connects with the first oil eliminator entrance, first oil eliminator outlet connects with two-stage condensation device high-temperature level entrance, the outlet of two-stage condensation device high-temperature level connects with the first device for drying and filtering entrance, first device for drying and filtering outlet connects with the first regenerator high-pressure side entrance, first regenerator high-pressure side outlet connects with first throttle device portal, the outlet of first throttle device connects with Intermediate Heat Exchanger high-temperature level entrance, the outlet of Intermediate Heat Exchanger high-temperature level connects with the first regenerator low-pressure end entrance, first regenerator low-pressure end outlet connects with the first compressor return air pipe.R404A cold-producing medium is injected in high-temperature level refrigeration cycle loop, cold-producing medium enters the first oil eliminator after the first compressor, through the condensation of two-stage condensation device high-temperature level, enter the first device for drying and filtering, after to enter the first regenerator high-pressure side excessively cold, after the throttling of first throttle device, after entering Intermediate Heat Exchanger high-temperature level sweat cooling, through the first regenerator low-pressure end, then return the first compressor.
Low-temperature level refrigeration cycle loop is: the second compressor exhaust pipe connects with two-stage condensation device low-temperature level entrance, the outlet of two-stage condensation device low-temperature level connects with the second oil eliminator entrance, second oil eliminator outlet connects with Intermediate Heat Exchanger low-temperature level entrance, the outlet of Intermediate Heat Exchanger low-temperature level connects with the second device for drying and filtering entrance, second device for drying and filtering outlet connects with the second regenerator high-pressure side entrance, second regenerator high-pressure side outlet connects with the second throttling device portal, second throttling arrangement outlet connects with evaporator inlet, evaporator outlet connects with the second regenerator low-pressure end entrance, second regenerator low-pressure end outlet connects with compressor return air pipe.Low-temperature refrigerant closed circuit injects R23 cold-producing medium, the low-temperature level that cold-producing medium enters two-stage condensation device after the second compressor compresses carries out precooling, then enter Intermediate Heat Exchanger through the second oil eliminator and carry out condensation, condensed low-temperature refrigerant enter after the second device for drying and filtering drying the second regenerator high-pressure side cross cold after, after entering the second throttling arrangement throttling, enter evaporator evaporation, through the second regenerator low-pressure end, finally get back to the second compressor.
A kind of two-stage superposition type cryogenic refrigerating system is arranged in refrigerator.
A kind of each building block type selecting of two-stage superposition type cryogenic refrigerating system is: two-stage condensation device is copper pipe fin type condenser, low-temperature level carries out precooling to R23 cold-producing medium, high-temperature level condensation R404A cold-producing medium, can effectively reduce Intermediate Heat Exchanger thermic load, improves system thermal efficiency.
Refrigerator is 508L refrigerator, depth of foam 12cm;
Evaporimeter is five layers of Φ 8 wire-and-tube evaporator being arranged in refrigerator;
Intermediate Heat Exchanger is 2P double pipe heat exchanger;
First compressor air-discharging amount is 34.5 milliliters;
Second compressor air-discharging amount is 30.5 milliliters;
First throttle device is the heating power expansion valve of 2.1 kilowatts of refrigerating capacitys;
Second throttling arrangement is internal diameter 1.5 millimeters, the capillary that length is 4000 millimeters.
Embodiment two
In the present embodiment, first throttle device and the second throttling arrangement are capillary.
In the present embodiment, not mentioned part is with embodiment one.
The utility model adopts two kinds of cold-producing mediums to reach-86 DEG C, and key is distributing rationally of systematic parameter, simultaneously the volume of compressor, the length of capillary, the heap(ed) capacity of high/low temperature cold-producing medium, the cold mode of mistake of high/low temperature cold-producing medium.The coupling of cold-producing medium adding amount and the difficulty of reduction regulating system stable operation when avoiding Autocascades system to keep in repair.
Above-described embodiment is utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (8)
1. a two-stage superposition type cryogenic refrigerating system, is characterized in that: comprising: low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop; Low-temperature level refrigeration cycle loop and high-temperature level refrigeration cycle loop share a two-stage condensation device and an Intermediate Heat Exchanger;
Two-stage condensation device comprises high-temperature level and low-temperature level, the high-temperature level access high-temperature level refrigeration cycle loop of two-stage condensation device, the low-temperature level access low-temperature level refrigeration cycle loop of two-stage condensation device;
Intermediate Heat Exchanger comprises high-temperature level and low-temperature level, the high-temperature level access high-temperature level refrigeration cycle loop of Intermediate Heat Exchanger, the low-temperature level access low-temperature level refrigeration cycle loop of Intermediate Heat Exchanger.
2., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 1, it is characterized in that: described high-temperature level refrigeration cycle loop comprises: the first compressor, the first oil eliminator, the first device for drying and filtering, the first regenerator, first throttle device; Wherein the first regenerator has four interfaces, is high-pressure side entrance, high-pressure side outlet, the outlet of low-pressure end entrance, low-pressure end respectively; Along the flow direction of cold-producing medium, the high-temperature level of the first compressor, the first oil eliminator, two-stage condensation device, the first device for drying and filtering, the high-pressure side entrance of the first regenerator, the high-pressure side outlet of the first regenerator, the high-temperature level of first throttle device, Intermediate Heat Exchanger, the low-pressure end entrance of the first regenerator connect successively, and the low-pressure end outlet of the first regenerator connects with the first compressor again; Low-temperature level refrigeration cycle loop comprises: the second compressor, the second oil eliminator, the second device for drying and filtering, the second regenerator, the second throttling arrangement, evaporimeter; Wherein the second regenerator has four interfaces, is high-pressure side entrance, high-pressure side outlet, the outlet of low-pressure end entrance, low-pressure end respectively; Along the flow direction of cold-producing medium, the low-temperature level of the second compressor, two-stage condensation device, the second oil eliminator, the low-temperature level of Intermediate Heat Exchanger, the second device for drying and filtering, the high-pressure side entrance of the second regenerator, the high-pressure side outlet of the second regenerator, the low-pressure end entrance of the second throttling arrangement, evaporimeter, the second regenerator connect successively, and the low-pressure end outlet of the second regenerator connects with the second compressor again.
3., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 2, it is characterized in that: described high-temperature level refrigeration cycle loop is R404A refrigeration cycle; Low-temperature level refrigeration cycle loop is R23 refrigeration cycle.
4. according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 2, it is characterized in that: described two-stage condensation device is copper pipe fin type two-stage condensation device.
5., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 3, it is characterized in that: be arranged in refrigerator.
6., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 5, it is characterized in that: described refrigerator is the refrigerator that dischargeable capacity 500 rises to 600 liters;
Evaporimeter is the wire-and-tube evaporator of internal diameter 5 to 8 millimeters, heat exchange area 0.8 to 1.2 square metres;
Intermediate Heat Exchanger is the double pipe heat exchanger of 2 to 5 kilowatts of heat exchange amounts, or is the plate type heat exchanger of 2 to 5 kilowatts of heat exchange amounts;
First compressor is the compressor of 28 to 36 milliliters of capacities;
Second compressor is the compressor of 25 to 33 milliliters of capacities;
First throttle device is the heating power expansion valve of 1.5 to 2.5 kilowatts of refrigerating capacitys, or is the capillary of internal diameter 1.5 millimeters, length 1000 to 2000 millimeters;
Second throttling arrangement is the heating power expansion valve of 0.7 to 1.5 kilowatts of refrigerating capacitys, or is the capillary of internal diameter 1.5 millimeters, length 4000 to 5000 millimeters.
7., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 2, it is characterized in that: described first throttle device is heating power expansion valve or capillary.
8., according to a kind of two-stage superposition type cryogenic refrigerating system according to claim 2, it is characterized in that: described second throttling arrangement is heating power expansion valve or capillary.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524553A (en) * | 2016-12-28 | 2017-03-22 | 广州芯康医疗科技有限公司 | Two-stage cascade enhanced-vapor-injection low-temperature refrigerating system |
| CN110081675A (en) * | 2018-01-25 | 2019-08-02 | 郑州大学 | A kind of novel freezing drying machine cold-hot integrated system |
| CN110553428A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | Cold-carrying circulating system |
| CN111043786A (en) * | 2019-12-23 | 2020-04-21 | 江苏苏净集团有限公司 | Carbon dioxide cascade heating unit and control method thereof |
| CN111156756A (en) * | 2020-01-19 | 2020-05-15 | 西安交通大学 | Self-adaptive charging amount adjusting system and control method in cooling process of ultralow temperature refrigerator |
-
2015
- 2015-10-28 CN CN201520850071.0U patent/CN205079493U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524553A (en) * | 2016-12-28 | 2017-03-22 | 广州芯康医疗科技有限公司 | Two-stage cascade enhanced-vapor-injection low-temperature refrigerating system |
| CN110081675A (en) * | 2018-01-25 | 2019-08-02 | 郑州大学 | A kind of novel freezing drying machine cold-hot integrated system |
| CN110081675B (en) * | 2018-01-25 | 2023-11-24 | 郑州大学 | Novel cold and hot integrated system of freeze dryer |
| CN110553428A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | Cold-carrying circulating system |
| CN110553428B (en) * | 2019-08-27 | 2021-09-17 | 中国科学院理化技术研究所 | Cold-carrying circulating system |
| CN111043786A (en) * | 2019-12-23 | 2020-04-21 | 江苏苏净集团有限公司 | Carbon dioxide cascade heating unit and control method thereof |
| CN111156756A (en) * | 2020-01-19 | 2020-05-15 | 西安交通大学 | Self-adaptive charging amount adjusting system and control method in cooling process of ultralow temperature refrigerator |
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