CN203550351U - Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system - Google Patents
Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system Download PDFInfo
- Publication number
- CN203550351U CN203550351U CN201320416873.1U CN201320416873U CN203550351U CN 203550351 U CN203550351 U CN 203550351U CN 201320416873 U CN201320416873 U CN 201320416873U CN 203550351 U CN203550351 U CN 203550351U
- Authority
- CN
- China
- Prior art keywords
- capillary tube
- starting
- buffer structure
- pressure buffer
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005057 refrigeration Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a starting up high pressure buffer structure and a stand-alone auto-cascade refrigerating system. The starting up high pressure buffer structure comprises a first capillary tube and a second capillary tube; one ends of the first capillary tube and the second capillary tube are connected with the same magnetic valve; the magnetic valve is used for connecting with an evaporative condenser of the stand-alone auto-cascade refrigerating system; the other ends of the first capillary tube and the second capillary tube are in parallel connection to be in series connection with an evaporator of the stand-alone auto-cascade refrigerating system; the stand-alone auto-cascade refrigerating system comprises a compressor, the above starting up high pressure buffer structure, the evaporative condenser and the evaporator. The starting up high pressure buffer structure and the stand-alone auto-cascade refrigerating system have the advantages of being simple in structure, and reliable and stable in operation, effectively reducing the discharging pressure during starting up of the system and well protecting the compressor and system pipelines.
Description
Technical Field
The utility model relates to a start high pressure buffer structure and unit are from overlapping refrigerating system.
Background
The automatic cascade refrigeration cycle system uses mixed refrigeration working media and realizes multistage cascade through a single compressor, is a main refrigeration device system for preparing a temperature range from minus 40 ℃ to minus 200 ℃, and is widely applied to small-sized equipment such as low-temperature electronics, low-temperature medicine, low-temperature biology, low-temperature experimental environment and the like. Compared with a multi-stage compression system and a classical cascade system, the system has the advantages of simple and compact structure, low cost, no moving part at the low-temperature end and reliable performance. The automatic cascade refrigeration cycle can also obtain a plurality of different evaporation temperatures by using one compressor and be applied to different low-temperature environments. When the cold energy in the evaporative condenser is not completely used for cooling the refrigerant steam containing more low boiling point, a part of the residual cold energy can be used for cooling other temperature regions.
The self-cascade refrigeration cycle system mostly adopts more than two mixed refrigeration working mediums, the mixed refrigeration working mediums are formed by mixing more than two pure refrigeration working mediums according to a certain proportion, and the mixed refrigeration working mediums are divided into azeotropic refrigeration working mediums and non-azeotropic refrigeration working mediums according to the fact whether the mixed solution has azeotropic property or not. The existing refrigerants mostly have the following defects: when the compressor is just started, the high-temperature refrigerant is not completely condensed into liquid, and the cold quantity generated after throttling is small, so that the medium-temperature refrigerant and the low-temperature refrigerant cannot be immediately condensed, therefore, on one hand, the medium-temperature refrigerant and the low-temperature refrigerant which are not condensed become non-condensable gas in the high-temperature refrigerant, the condensing speed of the high-temperature refrigerant is slowed, and the initial cooling speed of the system is influenced; on the other hand, the amount of refrigerant gas which is not cooled is large, the system pressure is always high in the process that the compressor is just started, and the compressor and the pipeline system are easily damaged.
It will thus be seen that the prior art is susceptible to further improvements and enhancements.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an avoid the weak point that above-mentioned prior art exists, provide a start high pressure buffer structure and unit from overlapping refrigerating system.
The utility model discloses the technical scheme who adopts does:
the starting-up high-pressure buffer structure comprises a first capillary tube and a second capillary tube, wherein one end of the first capillary tube and one end of the second capillary tube are both connected with the same electromagnetic valve, the electromagnetic valve is used for being connected with an evaporative condenser of the single-machine self-cascade refrigeration system, and the other end of the first capillary tube and the other end of the second capillary tube are connected in parallel and then are used for being connected with an evaporator of the single-machine self-cascade refrigeration system in series.
The single-machine self-cascade refrigeration system comprises a compressor, the starting-up high-pressure buffer structure, an evaporative condenser and an evaporator, wherein the starting-up high-pressure buffer structure is provided with an electromagnetic valve connected with the evaporative condenser, and the first capillary tube and the second capillary tube are connected in parallel and then connected in series with the evaporator; the outlet of the compressor is connected with a condenser, and the condenser is connected with the inlet of the gas-liquid separator; the first outlet of the gas-liquid separator is connected with a third capillary, and the outlet of the third capillary is connected with the first inlet of the evaporative condenser; the second outlet of the gas-liquid separator is connected with the second inlet of the evaporator; a first outlet of the evaporative condenser is connected with an inlet of the compressor, and the first outlet corresponds to the first inlet; a second outlet of the evaporative condenser is connected with the electromagnetic valve, and corresponds to a second inlet of the gas-liquid separator; the evaporator is connected to an inlet of the compressor.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:
the utility model discloses simple structure, the operation is reliable stable, has reduced the exhaust pressure when the system starts effectively, has played fine guard action to compressor and system's pipeline.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein,
1. compressor 2, condenser 3, gas-liquid separator 4, third capillary 5, evaporative condenser 6, solenoid valve 7, first capillary 8, second capillary 9, evaporimeter
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, but the present invention is not limited to these embodiments.
As shown in fig. 1, the start-up high-pressure buffer structure includes a first capillary 7 and a second capillary 8, one end of the first capillary 7 and one end of the second capillary 8 are both connected to the same solenoid valve 6, the solenoid valve 6 is used for being connected to the evaporative condenser 5 of the single-machine self-cascade refrigeration system, and the other end of the first capillary 7 and the other end of the second capillary 8 are connected in parallel and then are used for being connected in series to the evaporator 9 of the single-machine self-cascade refrigeration system.
The first capillary 7 can be selected from a large-flow buffer capillary, and the second capillary 8 can be selected from a low-temperature level capillary.
The single-machine self-cascade refrigeration system comprises a compressor 1, the starting-up high-pressure buffer structure, an evaporative condenser and an evaporator, wherein the starting-up high-pressure buffer structure comprises an electromagnetic valve 6 connected with the evaporative condenser 5, and a first capillary tube 7 and a second capillary tube 8 which are connected in parallel are connected in series with the evaporator 9; the outlet of the compressor 1 is connected with a condenser 2, and the condenser 2 is connected with the inlet of a gas-liquid separator 3; a first outlet of the gas-liquid separator 3 is connected with a third capillary tube 4, and an outlet of the third capillary tube 4 is connected with a first inlet of the evaporative condenser 5; a second outlet of the gas-liquid separator 3 is connected with a second inlet of the evaporator 9; a first outlet of the evaporative condenser 5 is connected with an inlet of the compressor 1, and corresponds to the first inlet; a second outlet of the evaporative condenser 5 is connected with the electromagnetic valve 6, and corresponds to a second inlet of the gas-liquid separator 3; the evaporator 9 is connected to the inlet of the compressor 1.
The third capillary 4 can be selected from high temperature grade capillary.
The working principle of the utility model can be described briefly as follows:
when the utility model is started, the first capillary tube 7 is firstly adopted for refrigeration, so as to ensure that the highest exhaust pressure is within the requirement of the compressor 1 when the compressor is started; along with the operation of a refrigeration system, after the exhaust pressure is reduced to a certain degree, the electromagnetic valve 6 is switched to the second capillary tube 8 for normal temperature raising, more specifically, in the initial operation stage of the system, the first capillary tube 7 is adopted for refrigeration, and meanwhile, the low-temperature stage initial non-condensable refrigerant gas gathered at the high-pressure end can rapidly enter the gas return end, so that a certain pressure reduction buffer effect is generated on the high-pressure end; along with the temperature raising, the pressure of the exhaust gas can be continuously reduced as the liquefaction amount of the low-temperature-level refrigerant is increased and the temperature in the refrigerator is reduced; at this time, the electromagnetic valve 6 is used to switch to the second capillary 8, and the exhaust pressure is controlled within the requirement of the compressor 1.
The part not mentioned in the utility model can be realized by adopting or using the prior art for reference.
Although terms such as compressor 1, gas-liquid separator 3, third capillary tube 4, first capillary tube 7, evaporator 9, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
It is further understood that the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (2)
1. Start high pressure buffer structure, its characterized in that: the single-machine self-cascade refrigeration system comprises a first capillary tube and a second capillary tube, wherein one end of the first capillary tube and one end of the second capillary tube are both connected with the same electromagnetic valve, the electromagnetic valve is used for being connected with an evaporative condenser of the single-machine self-cascade refrigeration system, and the other end of the first capillary tube and the other end of the second capillary tube are connected in parallel and then are used for being connected with an evaporator of the single-machine self-cascade refrigeration system in series.
2. The single-machine self-cascade refrigeration system is characterized in that: the starting-up high-pressure buffer structure comprises a compressor, the starting-up high-pressure buffer structure as claimed in claim 1, an evaporative condenser and an evaporator, wherein an electromagnetic valve of the starting-up high-pressure buffer structure is connected with the evaporative condenser, and the first capillary tube and the second capillary tube are connected in parallel and then are connected with the evaporator in series; the outlet of the compressor is connected with a condenser, and the condenser is connected with the inlet of the gas-liquid separator; the first outlet of the gas-liquid separator is connected with a third capillary, and the outlet of the third capillary is connected with the first inlet of the evaporative condenser; the second outlet of the gas-liquid separator is connected with the second inlet of the evaporator; a first outlet of the evaporative condenser is connected with an inlet of the compressor, and the first outlet corresponds to the first inlet; a second outlet of the evaporative condenser is connected with the electromagnetic valve, and corresponds to a second inlet of the gas-liquid separator; the evaporator is connected to an inlet of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320416873.1U CN203550351U (en) | 2013-07-12 | 2013-07-12 | Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320416873.1U CN203550351U (en) | 2013-07-12 | 2013-07-12 | Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203550351U true CN203550351U (en) | 2014-04-16 |
Family
ID=50468459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320416873.1U Expired - Lifetime CN203550351U (en) | 2013-07-12 | 2013-07-12 | Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203550351U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266398A (en) * | 2014-10-20 | 2015-01-07 | 深圳麦克维尔空调有限公司 | Air handling unit and high temperature and low temperature switching system thereof |
| CN105333641A (en) * | 2014-07-02 | 2016-02-17 | 约克广州空调冷冻设备有限公司 | Air-source water heating system of air conditioner |
| CN107576089A (en) * | 2017-10-26 | 2018-01-12 | 焦景田 | Superposition type air-cooled condensing group |
| CN107576088A (en) * | 2017-10-26 | 2018-01-12 | 焦景田 | A kind of air source heat pump heating system |
| CN108895694A (en) * | 2018-07-20 | 2018-11-27 | 西安交通大学 | A kind of improvement self-cascade refrigeration system system and its control method |
-
2013
- 2013-07-12 CN CN201320416873.1U patent/CN203550351U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333641A (en) * | 2014-07-02 | 2016-02-17 | 约克广州空调冷冻设备有限公司 | Air-source water heating system of air conditioner |
| CN105333641B (en) * | 2014-07-02 | 2017-10-03 | 约克广州空调冷冻设备有限公司 | Air-source air conditioning and water heating system |
| CN104266398A (en) * | 2014-10-20 | 2015-01-07 | 深圳麦克维尔空调有限公司 | Air handling unit and high temperature and low temperature switching system thereof |
| CN107576089A (en) * | 2017-10-26 | 2018-01-12 | 焦景田 | Superposition type air-cooled condensing group |
| CN107576088A (en) * | 2017-10-26 | 2018-01-12 | 焦景田 | A kind of air source heat pump heating system |
| CN108895694A (en) * | 2018-07-20 | 2018-11-27 | 西安交通大学 | A kind of improvement self-cascade refrigeration system system and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203550351U (en) | Starting up high pressure buffer structure and stand-alone auto-cascade refrigerating system | |
| Sun et al. | Comparative analysis of thermodynamic performance of a cascade refrigeration system for refrigerant couples R41/R404A and R23/R404A | |
| CN103512257B (en) | For the non-azeotrope hydrocarbon mixture self-cascade refrigeration system system of two temperature refrigerator | |
| Zhao et al. | Conventional and advanced exergy analysis of parallel and series compression-ejection hybrid refrigeration system for a household refrigerator with R290 | |
| US10101060B2 (en) | Cooling system | |
| CN102829572B (en) | Energy-saving ultralow-temperature preservation box | |
| JP4680644B2 (en) | A cycle system incorporating a multistage ejector into a heat pump for cold regions using a refrigerant mixture of dimethyl ether and carbon dioxide | |
| US20160138837A1 (en) | Heat pump arrangement and method for operating heat pump arrangement | |
| RU2013135652A (en) | SYSTEM FOR PERFORMING A COMPRESSION REFRIGERATING CYCLE USING WATER AS A REFRIGERANT | |
| CN206803544U (en) | Refrigeration experiment double-machine two-stage compression refrigerating system | |
| JP2022014455A (en) | Refrigerating device | |
| CN103471273B (en) | Mixed working medium refrigeration cycle system | |
| CN109737622B (en) | Two-stage auto-cascade low-temperature refrigeration cycle system and circulation method for enhancing efficiency of two-stage ejector | |
| CN104613685A (en) | Refrigeration device capable of being rapidly started after being stopped with reduced starting torque | |
| KR20180002632A (en) | Auto-cascade refrigeration system using phase change wave rotors and method of operation | |
| CN210861850U (en) | Double-stage throttling non-azeotropic working medium mechanical supercooling CO2Transcritical refrigeration cycle system | |
| TWI564524B (en) | Refrigeration cycle | |
| CN211823239U (en) | Ultra-low temperature transcritical cascade refrigeration system | |
| CN211120091U (en) | Cascade refrigeration system with supercooling and injection depressurization | |
| CN206593361U (en) | A kind of vehicle-mounted energy-saving refrigerator | |
| CN109307377B (en) | Two-stage self-cascade refrigeration cycle system and circulation method adopting ejector to increase efficiency | |
| JP2013170747A (en) | Refrigerant leakage detection device and freezing device | |
| CN215724329U (en) | Stepped hot fluorine defrosting system adopted by ultralow-temperature multistage self-cascade refrigeration and deep-cooling unit | |
| Saturday et al. | Computer Aided Comparative Analysis of the Effects of Superheating and Subcooling on the Performance of R134a and R717 in Simple Vapour Compression Systems | |
| CN204165291U (en) | A kind of energy-conserving refrigeration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |