CN102128508A - Ejector throttling air supplementing system and air supplementing method of heat pump or refrigeration system - Google Patents
Ejector throttling air supplementing system and air supplementing method of heat pump or refrigeration system Download PDFInfo
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- CN102128508A CN102128508A CN201010104818XA CN201010104818A CN102128508A CN 102128508 A CN102128508 A CN 102128508A CN 201010104818X A CN201010104818X A CN 201010104818XA CN 201010104818 A CN201010104818 A CN 201010104818A CN 102128508 A CN102128508 A CN 102128508A
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- 238000000034 method Methods 0.000 title claims description 20
- 238000005057 refrigeration Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims description 37
- 238000001704 evaporation Methods 0.000 claims description 31
- 230000008020 evaporation Effects 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 238000009792 diffusion process Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 1
- 230000005514 two-phase flow Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention relates to an ejector throttling and air supplementing system which comprises an air supplementing compressor, a condenser, a first ejector, a flash evaporator or an economizer, a second ejector, a gas-liquid separator and an evaporator, wherein a closed circulation loop is formed, the first ejector is connected in series between an outlet of the condenser and an inlet of the flash evaporator or an inlet of an auxiliary way economizer, an injection inlet of the first ejector is connected with an air outlet of the gas-liquid separator, the second ejector is connected in series between an outlet of the flash evaporator or the economizer and an inlet of the gas-liquid separator, an injection inlet of the second ejector is connected with an outlet of the evaporator, an outlet of the compressor is connected with an inlet of the condenser, and an air outlet of the. The invention adopts the ejector with simple structure, low cost, no moving parts and good adaptability to the working conditions of two-phase flow to replace a throttling device, and is beneficial to integrally improving the system performance.
Description
[technical field]
The present invention relates to the refrigeration and air-conditioning technical field, refer in particular to the throttling air compensating system and heat pump or the refrigeration system supplementing method for air that are applicable to air source heat pump system and freezing equipment.
[background technology]
Existing air source heat pump heating capacity is attenuation trend along with outdoor environment temperature reduces, in order to improve heating performance, the air supply compressor method improves the cryogenic system heating capacity in the middle of the common employing of hot pump in low temp system, mainly comprise middle air compensating system of flash evaporation and economizer air compensating system, see Fig. 1 and Fig. 2, it comprises the closed circulation loop that is made of compressor 205, condenser 206, evaporimeter 208, choke valve F1 and choke valve F2, flash evaporation 200 or economizer 201, makes compressor according to accurate twin-stage compression operation.Equally for freezing equipment in order to reach relatively low evaporating temperature and delivery temperature, refrigeration system generally adopts cool cycles mode in the middle of the two stages of compression.
But there is certain restriction loss in said system because what adopt is throttle valve gear, and along with the reduction restriction loss of environment temperature is big more, and seeing from the energy conservation angle needs to reclaim this part expansion work to improve refrigerating plant efficient.Lorentzen at first proposes to replace choke valve with decompressor, reclaims the expansion work of working medium pressure drop process, improves systematic energy efficiency ratio, but decompressor processing and manufacturing difficulty, cost is higher, and it is uneconomical to be used for the minitype air conditioner heat pump.
Therefore, provide a kind of and can improve refrigerating capacity and Energy Efficiency Ratio, energy-conservation air compensating system is real to be necessary.
[summary of the invention]
The object of the present invention is to provide good, the energy-conservation air compensating system of a kind of systematic function, and a kind of heat pump or refrigeration system supplementing method for air are provided.
For realizing the object of the invention, provide following technical scheme:
Injector throttling air compensating system of the present invention can provide following different schemes to realize goal of the invention.
1 one kinds of injector throttlings of scheme air compensating system, it comprises compressor, condenser, first injector, flash evaporation, second injector, gas-liquid separator, evaporimeter, it constitutes the closed circuit of sealing, serial connection first injector between condensator outlet and flash evaporation inlet, its injection inlet is connected with the gas-liquid separator gas outlet, serial connection second injector between the liquid outlet of flash evaporation and gas-liquid separator inlet, its injection inlet is connected with evaporator outlet, compressor outlet is connected with condenser inlet, the gas-liquid separator gas outlet is connected with the compressor air suction mouth, described compressor is provided with gas supplementing opening, and gas supplementing opening is connected with flash evaporation.
What scheme 2 injector throttling air compensating systems were different with scheme is, described flash evaporation is substituted by economizer, serial connection first injector between condensator outlet and bypass economizer inlet, main road economy inlet is connected to condensator outlet, serial connection second injector between the liquid outlet of economizer and gas-liquid separator inlet.
Aforementioned two kinds of injector throttling air compensating systems can also be connected to throttling arrangement, and the gas-liquid separator liquid outlet is connected with the throttling arrangement inlet, and outlet is connected evaporator inlet with throttling arrangement.
Described system can be accurate secondary compression air compensating system, and the pipeline between low pressure compressor and high pressure compressor is provided with gas supplementing opening, and described gas supplementing opening is connected with flash evaporation or economizer gas outlet.
Also can be two-stage compression system, this two-stage compression system comprises high pressure compressor and the low pressure compressor that is connected in series, and the exhaust outlet of described low pressure compressor is connected to the air entry of high pressure compressor.The exhaust outlet of described low pressure compressor is connected with described high pressure compressor air entry via flash evaporation or economizer, and described gas supplementing opening is the high pressure compressor suction inlet.
The present invention also provides a kind of heat pump or refrigeration system supplementing method for air, it adopts above-mentioned injector throttling air compensating system, the major part of gas-liquid separator top refrigerant vapour is sucked by compressor in the described method, set up first injection, tonifying Qi and the second injection step successively at refrigerant circulation loop, the described first injection step is by the small part low-pressure steam of first injector injection gas-liquid separator outlet; Described tonifying Qi step be low-pressure steam behind the first injector throttling, mixing, diffusion, enter flash evaporation or economizer become in the compacting refrigerant vapor, the middle compacting refrigerant vapor on flash evaporation or economizer top enters the compressor gas supplementing opening, and the middle compacting cryogen liquid of its underpart enters second injector as the working fluid of second injector; The described second injection step from the low-temperature low-pressure refrigerant steam that evaporimeter comes out, enters gas-liquid separator by the second injector injection behind injector throttling, mixing, diffusion.
Described method also further comprises the throttling step, the liquid refrigerant of the bottom of gas-liquid separator through throttling arrangement enter change the low-temperature low-pressure refrigerant steam into after evaporimeter carries out heat exchange after by the second injector injection.
Described system can be a two-stage compression system, comprise high pressure compressor and low pressure compressor, the tonifying Qi step is that the major part of gas-liquid separator top refrigerant vapour is sucked the compressed suction inlet that enters high pressure compressor after the refrigerant vapour mixing of coming out in back and economizer or flash evaporation of discharging by low pressure compressor in the described method.
Described system is a two-stage compression system, comprises high pressure compressor and low pressure compressor, and the refrigerant vapour that the tonifying Qi step is come out from low pressure compressor in the described method enters and sucked by high pressure compressor after economizer or flash evaporation form saturated refrigerant vapour.
The contrast prior art, the present invention has the following advantages:
First injector and second injector substitute corresponding throttling arrangement in the injector throttling tonifying Qi of the present invention system, reclaimed the throttling merit, first injector injection gas-liquid separator outlet low-pressure steam, improved compressor tonifying Qi pressure, second injector has improved the gas-liquid separator outlet pressure, and comprehensively these 2 compressor air suction pressure are improved.For air supply compressor, first injector injection part gas-liquid separator outlet steam has increased the compressor air compensation, and air intake duct flow minimizing simultaneously helps reducing the air intake duct pressure drop, makes systematic function further improve.The cold-producing medium mass dryness fraction of coming out to enter evaporimeter from gas-liquid separator reduces, reduced the evaporator inlet enthalpy, improved the cold-producing medium specific refrigerating effect, under the certain situation of refrigerating capacity, reduced evaporimeter inner refrigerant circular flow, reduced the evaporimeter pressure drop, evaporimeter shunting uniformity also improves in addition.
Therefore adopt simple in structure, cost is low, movement-less part, the injector good to the two phase flow adaptability for working condition replaces expansion valve, will help the overall improved system performance.
[description of drawings]
Fig. 1 is the schematic diagram of existing flash evaporation air compensating system;
Fig. 2 is the schematic diagram of existing economizer air compensating system;
Fig. 3 is an injector throttling flash evaporation air compensating system circular chart of the present invention;
Fig. 4 is an injector throttling flash evaporation air compensating system pressure-enthalpy chart of the present invention;
Fig. 5 is an injector throttling economizer air compensating system alternative elements schematic diagram of the present invention;
Fig. 6 is for not exclusively cooling off the two-stage compression system circular chart in the middle of the injector throttling of the present invention;
Fig. 7 is for not exclusively cooling off the two-stage compression system pressure-enthalpy chart in the middle of the injector throttling of the present invention;
Fig. 8 is complete cooling system alternative elements schematic diagram in the middle of the present invention.
[specific embodiment]
Embodiment one sees also Fig. 3, and system is made of compressor 105, condenser 106, first injector 101, flash evaporation 103, second injector 102, gas-liquid separator 107, throttling arrangement, evaporimeter 108.High temperature, the high-pressure refrigerant vapor 4 of discharging from compressor can be used for room heating with the heat transferred refrigerating medium or as the domestic hot-water through condenser 106.The high pressure refrigerant liquid 5 of coming out from condenser 106 enters first injector 101 as working fluid, the low-temperature low-pressure refrigerant steam 1 that injection comes out from gas-liquid separator 107, through 101 throttlings 6 of first injector, mix 7, enter flash evaporation 103 behind the diffusion 8, the middle compacting refrigerant vapor 9 on its top enters compressor gas supplementing opening 109, the low-temperature low-pressure refrigerant steam 16 that the middle compacting cryogen liquid 10 of its underpart comes out from evaporimeter 108 as second injector, 102 working fluid injections, through 102 throttlings 11 of second injector, mix 12, enter gas-liquid separator 107 behind the diffusion 13, gas-liquid separator 107 top refrigerant vapours 1 major part is sucked by compressor, a part is by first injector, 101 injection parts in addition, the liquid refrigerant 14 of its underpart after throttling arrangement becomes the very little cold-producing medium of mass dryness fraction 15 and enters evaporimeter 108 endothermic transitions to be steam 16 by second injector, 102 injections.In compressor, after the preliminary compression 2 of low-pressure refrigerant vapor 1 process of air inlet suction, suppress cryogen 3 with compacting cryogen 9 from the auxilairy air intake suction in being mixed into, enter condenser 106 after further boil down to high-pressure refrigerant vapor 4 compressed machines are discharged again.
Embodiment two sees also Fig. 5, similar with embodiment one, adopt economizer 104 systems to substitute flash evaporation 103 systems, sub-cooled liquid refrigerant 5 parts of coming out from condenser 106 are mixed 7, are entered economizer 104 heat absorptions behind the diffusion 8 and become refrigerant vapour 9 and enter the compressor gas supplementing opening again through 101 throttlings 6 of first injector with driving fluid, the main road cold-producing medium crosses cold back 10 as second injector, 102 working fluids economizer 104 in.
See also Fig. 6, embodiment three is on the basis of embodiment two, adopt two stages of compression to substitute original accurate secondary compressibility, gas-liquid separator 107 outlet refrigerant vapours 1 small part is by first injector, 101 injections, and the 3 suction inlet compression discharges 4 that enter high pressure compressor 111 entered condenser 106 after the refrigerant vapour 9 that major part is come out by low pressure compressor 112 suctions, compression discharge back 2 and economizer 104 mixed.
See also Fig. 8, embodiment four and embodiment three are similar, and the refrigerant vapour 2 that comes out from low pressure compressor 112 enters economizer 104 and forms saturated refrigerant vapour and sucked by high pressure compressor 111.
The cold-producing medium mass dryness fraction of coming out to enter evaporimeter 108 from gas-liquid separator 107 reduces, and has reduced evaporimeter 108 inlet enthalpies, has improved the cold-producing medium specific refrigerating effect, as Fig. 4 and shown in Figure 7.
The above is preferred embodiment of the present invention only, and protection scope of the present invention is not limited thereto, and anyly all belongs within the protection domain of the present invention based on the equivalent transformation on the technical solution of the present invention.
Claims (11)
1. injector throttling air compensating system, it comprises compressor, condenser, flash evaporation, gas-liquid separator, evaporimeter, it is characterized in that, described system also comprises first injector, second injector, it constitutes the closed circuit of sealing, serial connection first injector between condensator outlet and flash evaporation inlet, its injection inlet is connected with the gas-liquid separator gas outlet, serial connection second injector between the liquid outlet of flash evaporation and gas-liquid separator inlet, its injection inlet is connected with evaporator outlet, compressor outlet is connected with condenser inlet, the gas-liquid separator gas outlet is connected with the compressor air suction mouth, described compressor is provided with gas supplementing opening, and gas supplementing opening is connected with flash evaporation.
2. injector throttling air compensating system as claimed in claim 1, it is characterized in that, described flash evaporation is substituted by economizer, serial connection first injector between condensator outlet and bypass economizer inlet, main road economy inlet is connected to condensator outlet, serial connection second injector between the liquid outlet of economizer and gas-liquid separator inlet.
3. injector throttling air compensating system as claimed in claim 1 or 2 is characterized in that it further comprises throttling arrangement, and the gas-liquid separator liquid outlet is connected with the throttling arrangement inlet, and outlet is connected evaporator inlet with throttling arrangement.
4. injector throttling air compensating system as claimed in claim 3 is characterized in that, the described system secondary compression air compensating system that is as the criterion.
5. injector throttling air compensating system as claimed in claim 1 or 2, it is characterized in that, described system is a two-stage compression system, comprises the high pressure compressor and the low pressure compressor that are connected in series, and the exhaust outlet of described low pressure compressor is connected to the air entry of high pressure compressor.
6. injector throttling air compensating system as claimed in claim 5 is characterized in that the pipeline between low pressure compressor and high pressure compressor is provided with gas supplementing opening, and described gas supplementing opening is connected with flash evaporation or economizer gas outlet.
7. injector throttling air compensating system as claimed in claim 5 is characterized in that, the exhaust outlet of described low pressure compressor is connected with described high pressure compressor air entry via flash evaporation or economizer, and described gas supplementing opening is the high pressure compressor suction inlet.
8. heat pump or refrigeration system supplementing method for air, it is characterized in that described heat pump comprises as weighing 1 described system, the major part of gas-liquid separator top refrigerant vapour is sucked by compressor in the described method, set up first injection, tonifying Qi and the second injection step successively at refrigerant circulation loop, the described first injection step is by the small part low-pressure steam of first injector injection gas-liquid separator outlet; Described tonifying Qi step be low-pressure steam behind the first injector throttling, mixing, diffusion, enter flash evaporation or economizer become in the compacting refrigerant vapor, the middle compacting refrigerant vapor on flash evaporation or economizer top enters the compressor gas supplementing opening, and the middle compacting cryogen liquid of its underpart enters second injector as the working fluid of second injector; The described second injection step from the low-temperature low-pressure refrigerant steam that evaporimeter comes out, enters gas-liquid separator by the second injector injection behind injector throttling, mixing, diffusion.
9. as power 8 described a kind of heat pump or refrigeration system supplementing method for air, it is characterized in that described method also further comprises the throttling step, the liquid refrigerant of the bottom of gas-liquid separator through throttling arrangement enter change the low-temperature low-pressure refrigerant steam into after evaporimeter carries out heat exchange after by the second injector injection.
10. as power 8 or 9 described a kind of heat pump or refrigeration system supplementing method for air, it is characterized in that described system is a two-stage compression system, comprise high pressure compressor and low pressure compressor, the tonifying Qi step is that the major part of gas-liquid separator top refrigerant vapour is sucked the compressed suction inlet that enters high pressure compressor after the refrigerant vapour mixing of coming out in back and economizer or flash evaporation of discharging by low pressure compressor in the described method.
11. as power 8 or 9 described a kind of heat pump or refrigeration system supplementing method for air, it is characterized in that described system is a two-stage compression system, comprise high pressure compressor and low pressure compressor, the refrigerant vapour that the tonifying Qi step is come out from low pressure compressor in the described method enters and is sucked by high pressure compressor after economizer or flash evaporation form saturated refrigerant vapour.
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| CN201010104818.XA CN102128508B (en) | 2010-01-19 | 2010-01-19 | Ejector throttling air supplementing system and air supplementing method of heat pump or refrigeration system |
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| CN201010104818.XA CN102128508B (en) | 2010-01-19 | 2010-01-19 | Ejector throttling air supplementing system and air supplementing method of heat pump or refrigeration system |
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| CN109373650A (en) * | 2018-11-06 | 2019-02-22 | 珠海格力电器股份有限公司 | injection system and air conditioning system |
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| CN110207412A (en) * | 2019-04-23 | 2019-09-06 | 同济大学 | A kind of adjustable twin-stage evaporation injection refrigeration system of capacity |
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| CN114251865A (en) * | 2022-01-06 | 2022-03-29 | 西安交通大学 | Cold and hot combined supply injection circulation system and working method thereof |
| CN114608216A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | Defrosting method of high-energy-efficiency transcritical carbon dioxide double-stage compression cold-hot combined supply system |
| CN114608215A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | High-energy-efficiency transcritical carbon dioxide two-stage compression cold-heat combined supply system |
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