CN107631509A - Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band - Google Patents
Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band Download PDFInfo
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- CN107631509A CN107631509A CN201711042034.7A CN201711042034A CN107631509A CN 107631509 A CN107631509 A CN 107631509A CN 201711042034 A CN201711042034 A CN 201711042034A CN 107631509 A CN107631509 A CN 107631509A
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- stage compressor
- flash
- high pressure
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- 239000007788 liquid Substances 0.000 claims abstract description 7
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 230000002262 irrigation Effects 0.000 abstract 1
- 238000003973 irrigation Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention belongs to cool down Two-stage refrigerating system completely among a kind of three-level throttling of the double flash vessels of band.Problem to be solved is exactly existing for background technology：High pressure stage compressor suction temperature is too high, lubrication oil circulation amount is too big, causes the reduction of whole system efficiency.Drip irrigation device is used by solving the technical problem：High pressure stage compressor outlet returns to high pressure stage compressor entrance by condenser, liquid reservoir, one-level choke valve, flash intercooler F mouths and E mouths successively by pipeline；Low pressure stage compressor outlet returns to high pressure stage compressor entrance by flash intercooler D mouths and G mouths, two-step throttle valve, flash type economizer B mouths and C mouths, three-level choke valve, evaporator successively by pipeline, and economizer pressure-regulating valve is provided between flash type economizer A mouths and low-pressure stage compressor gas supplementing opening.Suitable for refrigeration system.
Description
Technical field：It is complete among the three-level throttling of the double flash vessels of specifically a kind of band the invention belongs to Refrigeration Technique
Full cooling Two-stage refrigerating system.
Background technology：Refrigeration system evaporating temperature has single-stage band economizer, unit double in -25~-55 DEG C of sections at present
Several refrigeration system forms such as level, double-machine two-stage.Single-stage band economizer system, structure is most simple, due to being the edge of single stage compress
Therefore COP is poor.Single machine two-stage system, see invention patent mandate notification number CN 100425839C, structure is also very simple, twin-stage pressure
Its efficiency that contracts than single-stage band economizer at -40 DEG C it is high by about 14%.Double-machine two-stage system, see invention patent mandate notification number CN
100447501C, structure is slightly complicated, after low-pressure stage band economizer, efficiency than single machine two-stage at -45 DEG C it is high by about 4%.The two are double
Level system existing for common issue be：Low-pressure stage compressor air-discharging is inhaled by high pressure stage compressor together without cooling, and lubricating oil
Enter, suction temperature is too high, lubrication oil circulation amount is too big, high pressure stage compressor and single-stage operation phase specific efficiency degradation, makes
Reduced into whole system efficiency.
The content of the invention：The purpose of the present invention is exactly to propose to cool down twin-stage completely among a kind of three-level throttling of the double flash vessels of band
Refrigeration system, to solve background technology presence：Low-pressure stage compressor air-discharging is compressed by hiigh pressure stage together without cooling, and lubricating oil
Machine suck, suction temperature is too high, lubrication oil circulation amount is too big, high pressure stage compressor and single-stage operation phase specific efficiency it is serious under
Drop, cause whole system efficiency reduce the problem of.Technical scheme is used by solving the technical problem：A kind of double flash vessels of band
Three-level throttling among completely cooling Two-stage refrigerating system, it is characterised in that：Hiigh pressure stage system is：High pressure stage compressor outlet is logical
Cross pipeline and return to hiigh pressure stage compression by condenser, liquid reservoir, one-level choke valve, flash intercooler F mouths and E mouths successively
Machine entrance；Low-pressure stage system is：Low pressure stage compressor outlet by pipeline successively by flash intercooler D mouths and G mouths,
Two-step throttle valve, flash type economizer B mouths and C mouths, three-level choke valve, evaporator return to high pressure stage compressor entrance, flash type
Economizer pressure-regulating valve is provided between economizer A mouths and low-pressure stage compressor gas supplementing opening.Wherein, evaporator and high pressure stage compressor
By-passing valve is provided between entrance, middle cold pressing force regulating valve is provided between flash intercooler E mouths and high pressure stage compressor entrance.
The E mouths and F mouths of flash intercooler are located at gas phase zone, and the G mouths and D mouths of flash intercooler are located at liquid
Phase region.The B mouths of cooling double-machine two-stage refrigeration system device and A mouths are located at gas phase zone completely between the economic jjq0447501C9C of flash type,
The C mouths of flash type economizer are located at liquid phase region.
The possessed compared with the prior art beneficial effect of the present invention is：Using above-mentioned technical proposal, on the one hand, low-pressure stage
The discharge superheat of compressor is very high, about 70 DEG C, is not sucked by high pressure stage compressor directly, but be discharged into flash type
Between cooler liquid phase, sucked after liquid scrubbing cools down with the state of refrigerant saturated gas by high pressure stage compressor, together
When also the lubricating oil separation in low-pressure stage compressor air-discharging is gone out, the compression of the running status and ordinary single-stage of high pressure stage compressor
Machine is identical, therefore performance is identical, without any loss.On the other hand, flash intercooler and flash type warp are set
Double-machine two-stage refrigeration system device is cooled down completely between Ji jjq0447501C9C so that refrigerant high pressure liquid is from liquid reservoir to evaporation
It is that have passed through one-level choke valve, two-step throttle valve, three-level choke valve three-level reducing pressure by regulating flow in the pressure reduction of device, and one-level section
Stream, two-step throttle are compared, and thermodynamics advance is very high, and system COP is higher than double-machine two-stage by about 4.4% at -45 DEG C.Another side
Face, system boot draw thermophase, because evaporator pressure is higher, more than low-pressure stage compressor can full-load run pressure, be
The problem of avoiding the low-pressure stage compressor not full-load run efficiency low, by-passing valve is set.High pressure stage compressor is straight by by-passing valve
Connect from evaporator air-breathing, when evaporator pressure be down to low-pressure stage compressor can full-load run pressure when, low-pressure stage compressor
Start, system can be run under higher efficiency.Because by-passing valve and low-pressure stage compressor are parallel relationships, therefore have portion
Gas is divided to enter from low-pressure stage compressor air suction end inside compressor, drive rotor rotates, and influences the compressor life-span；To solve this
One problem, the middle cold pressure governor valve control flash intercooler pressure of setting are higher than high pressure stage compressor pressure of inspiration(Pi)
One value, ensure that the exhaust end of low-pressure stage compressor is higher than air-breathing end pressure, avoid Suck and exhaust pressure inversion phenomenon.
Brief description of the drawings：Fig. 1 is the schematic diagram of the present invention.
Embodiment：
Embodiment 1：With reference to figure 1, cooling Two-stage refrigerating system, its feature completely exists among a kind of three-level throttling of the double flash vessels of band
In：Hiigh pressure stage system is：The outlet of high pressure stage compressor 2 is by pipeline successively by condenser 1, liquid reservoir 13, one-level choke valve
12nd, flash intercooler 11F mouths and E mouths return to the entrance of high pressure stage compressor 2；Low-pressure stage system is：Low-pressure stage compressor 5
Flash intercooler 11D mouths and G mouths, two-step throttle valve 10, flash type economizer 9B mouths are passed through in outlet successively by pipeline
The entrance of high pressure stage compressor 5, flash type economizer 9A mouths and low-pressure stage compressor are returned with C mouths, three-level choke valve 8, evaporator 7
Economizer pressure-regulating valve 6 is provided between 5 gas supplementing openings.Wherein, by-passing valve 4 is provided between evaporator 7 and the entrance of high pressure stage compressor 2,
Middle cold pressing force regulating valve 3 is provided between flash intercooler 11E mouths and the entrance of high pressure stage compressor 2.
Claims (2)
1. Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band, it is characterised in that：Hiigh pressure stage system
It is：High pressure stage compressor（2）Condenser is passed through in outlet successively by pipeline（1）, liquid reservoir（13）, one-level choke valve（12）, dodge
Hairdo intercooler（11）F mouths and E mouths return to high pressure stage compressor（2）Entrance；Low-pressure stage system is：Low-pressure stage compressor
（5）Flash intercooler is passed through in outlet successively by pipeline（11）D mouths and G mouths, two-step throttle valve（10）, flash type economy
Device（9）B mouths and C mouths, three-level choke valve（8）, evaporator（7）Return to low-pressure stage compressor（5）Entrance, flash type economizer（9）A
Mouth and low-pressure stage compressor（5）Economizer pressure-regulating valve is provided between gas supplementing opening（6）.
2. cooling down Two-stage refrigerating system completely among a kind of three-level throttling of the double flash vessels of band according to claim 1, it is special
Sign is evaporator（7）And high pressure stage compressor（2）By-passing valve is provided between entrance（4）, flash intercooler（11）E mouths and
High pressure stage compressor（2）Middle cold pressing force regulating valve is provided between entrance（3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042034.7A CN107631509A (en) | 2017-10-31 | 2017-10-31 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042034.7A CN107631509A (en) | 2017-10-31 | 2017-10-31 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107631509A true CN107631509A (en) | 2018-01-26 |
Family
ID=61106020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711042034.7A Pending CN107631509A (en) | 2017-10-31 | 2017-10-31 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336700A (en) * | 2020-03-04 | 2020-06-26 | 宁夏万仕隆冷冻科技股份有限公司 | Freon R507a twice throttling refrigeration system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396779A (en) * | 1990-09-14 | 1995-03-14 | Nartron Corporation | Environmental control system |
| CN2896140Y (en) * | 2006-02-14 | 2007-05-02 | 南京天加空调设备有限公司 | Double-machine double-stage low-temperature screw-stem type refrigeration compressor group |
| CN102460036A (en) * | 2009-06-12 | 2012-05-16 | 开利公司 | Refrigerant system with multiple load modes |
| CN103335458A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling double-stage compression refrigeration system |
| CN105466059A (en) * | 2015-12-21 | 2016-04-06 | 珠海格力电器股份有限公司 | Transcritical heat pump device |
| CN207422706U (en) * | 2017-10-31 | 2018-05-29 | 吴家伟 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
-
2017
- 2017-10-31 CN CN201711042034.7A patent/CN107631509A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396779A (en) * | 1990-09-14 | 1995-03-14 | Nartron Corporation | Environmental control system |
| CN2896140Y (en) * | 2006-02-14 | 2007-05-02 | 南京天加空调设备有限公司 | Double-machine double-stage low-temperature screw-stem type refrigeration compressor group |
| CN102460036A (en) * | 2009-06-12 | 2012-05-16 | 开利公司 | Refrigerant system with multiple load modes |
| CN103335458A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling double-stage compression refrigeration system |
| CN105466059A (en) * | 2015-12-21 | 2016-04-06 | 珠海格力电器股份有限公司 | Transcritical heat pump device |
| CN207422706U (en) * | 2017-10-31 | 2018-05-29 | 吴家伟 | Two-stage refrigerating system is cooled down completely among a kind of three-level throttling of the double flash vessels of band |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336700A (en) * | 2020-03-04 | 2020-06-26 | 宁夏万仕隆冷冻科技股份有限公司 | Freon R507a twice throttling refrigeration system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180126 |