CN203464542U - Air source low-temperature two-stage compression heat pump air conditioner - Google Patents
Air source low-temperature two-stage compression heat pump air conditioner Download PDFInfo
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- CN203464542U CN203464542U CN201320448527.1U CN201320448527U CN203464542U CN 203464542 U CN203464542 U CN 203464542U CN 201320448527 U CN201320448527 U CN 201320448527U CN 203464542 U CN203464542 U CN 203464542U
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Abstract
The utility model discloses an air source low-temperature two-stage compression heat pump air conditioner which comprises an air compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a throttling gear. The compressor comprises a high-pressure compressor and a low-pressure compressor which is connected onto an air return pipeline of the high-pressure compressor, wherein an exhaust port of the low-pressure compressor is connected with a suction port of the high-pressure compressor. Low-temperature low-pressure air in the air return pipeline is compressed through the low-pressure compressor and enters the high-pressure compressor to be compressed for second time through the suction port of the high-pressure compressor. Therefore, heating capability and energy efficiency ratio of the heat pump air conditioner during low-temperature heating operation are effectively improved.
Description
Technical field
The utility model relates to a kind of air source heat pump air-conditioner, relates in particular to a kind of air source low-temperature two-stage compression heat pump air-conditioning.
Background technology
Energy-conservation is long-range strategy and policy of China's economy and social development, is also when last very urgent task.Energy crisis is just more and more seriously restricting the fast development of Chinese national economy, and " severe power shortage " let us of outburst in all parts of the country clearly realized that the seriousness of this problem in recent years, and therefore, carrying out of Energy-saving Projects is very urgent.
What on China's heat pump air conditioner market, generally sell at present is mainly air source heat pump air-conditioner, but when winter, heat pump type air conditioner carried out low-temperature heating operation, because its evaporating temperature is low, compression ratio is large, easily makes heating capacity poor, and Energy Efficiency Ratio is low.Application number is that 200920168511.9 Chinese patents disclose a kind of heat pump air conditioner; comprise the compressor, four-way change-over valve, condenser, evaporimeter and the orifice union that by refrigerant pipeline, connect, described condenser and described evaporimeter are by the described compressor of the selective connection of described four-way change-over valve; Also comprise two-way shut-off valve, be in parallel with described orifice union, the two-way shut-off valve of this heat pump air conditioner can make refrigerant pipe pressure Fast-Balance, can realize restarting fast of heat pump air conditioner.But heating capacity and Energy Efficiency Ratio during this heat pump air conditioner low-temperature heating operation still have much room for improvement.
Summary of the invention
The utility model is mainly to provide a kind of air source low-temperature two-stage compression heat pump air-conditioning, heating capacity and Energy Efficiency Ratio while effectively having improved the operation of heat pump air conditioner low-temperature heating.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: it comprises compressor, outdoor heat exchanger, indoor heat exchanger, cross valve and throttling arrangement, described compressor comprises hiigh pressure stage compressor, be connected to the low-pressure stage compressor in the return line of described hiigh pressure stage compressor, the exhaust outlet of described low-pressure stage compressor is connected with the air entry of described hiigh pressure stage compressor, low-temp low-pressure gas in described return line is after the compression of described low-pressure stage compressor, air entry by described hiigh pressure stage compressor enters in described hiigh pressure stage compressor and carries out second-compressed again.
As preferably, described a kind of air source low-temperature two-stage compression heat pump air-conditioning also comprises the flash vessel being connected between described indoor heat exchanger and described indoor heat exchanger, and the gas outlet of described flash vessel is connected with the air entry of described hiigh pressure stage compressor.
As preferably, the inlet of described flash vessel is connected with described indoor heat exchanger,, the liquid outlet of described flash vessel is connected with described outdoor heat exchanger.
As preferably, described flash vessel is arranged on described flash vessel pipeline, between described indoor heat exchanger and described indoor heat exchanger, is also provided with refrigeration electric expansion valve, and described refrigeration electric expansion valve is in parallel with described flash vessel pipeline.
As preferably, described flash vessel pipeline also comprises and is connected to heating auxiliary electric expansion valve, be connected on described flash vessel liquid outlet and heat main electric expansion valve on described flash vessel inlet.
As preferably, described flash vessel pipeline also comprises the magnetic valve being connected on described flash vessel gas outlet.
As preferably, described refrigeration electric expansion valve when air conditioner low temperature heating moves in closed condition.
As preferably, described in heat auxiliary electric expansion valve, magnetic valve and heat main electric expansion valve and when air conditioner refrigerating moves, be closed condition.
As preferably, in described return line, be provided with check valve.
As preferably, described a kind of air source low-temperature two-stage compression heat pump air-conditioning also comprises controller, described outdoor heat exchanger is condenser, and described indoor heat exchanger is evaporimeter, between described low-pressure stage compressor and described hiigh pressure stage compressor, is also provided with intercooler.
The beneficial effect that the utility model brings is, the utility model has adopted Two-stage Compression structure, and increase system exhaust amount in conjunction with flash vessel pipeline, reduced system exhaust temperature, promote heating capacity, effectively reduced the power consumption of unit, improved the COP value of unit, and there is feature applied widely, that reliability is high, energy-efficient performance is good, can round-the-clock use.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural principle schematic diagram of the present utility model.
Label declaration: 1, low-pressure stage compressor, 2, hiigh pressure stage compressor, 3, cross valve, 4, condenser, 5, outer blower fan, 6, heat auxiliary electric expansion valve, 7, magnetic valve, 8, flash vessel, 9, refrigeration electric expansion valve, 10, heat main electric expansion valve, 11, evaporimeter, 12, inner blower, 13, controller, 14, check valve.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the air source low-temperature two-stage compression heat pump air-conditioning of the present embodiment as shown in Figure 1, comprise the off-premises station and the indoor set that contain refrigeration system, indoor set comprises controller 13, evaporimeter 11, inner blower 12, and off-premises station comprises low-pressure stage compressor 1, hiigh pressure stage compressor 2, cross valve 3, condenser 4, outer blower fan 5, heats auxiliary electric expansion valve 6, magnetic valve 7, flash vessel 8, refrigeration electric expansion valve 9, heat main electric expansion valve 10.
Controller 13 adopts Single-chip Controlling, and the importation of controller 13 comprises: external environment temperature sensor, inner coil pipe temperature sensor, outer coil temperature sensor, interior environment temperature sensor, exhaust gas temperature sensor, suction temperature sensor.The output of controller 13 is for controlling with lower component: low-pressure stage compressor 1, hiigh pressure stage compressor 2, cross valve 3, outer blower fan 5, heat auxiliary electric expansion valve 6, magnetic valve 7, refrigeration electric expansion valve 9, heat main electric expansion valve 10, inner blower 12.
The blast pipe of hiigh pressure stage compressor 2 with the D of cross valve 3 to being connected, the C of cross valve 3 is to the air inlet that connects condenser 4, the S of cross valve 3 is to the air entry that connects low-pressure stage compressor 1, the S of cross valve 3 to and by check valve 14, connect hiigh pressure stage compressor 2 air entries, pipeline between the air entry of cross valve 3 and hiigh pressure stage compressor 2 forms the return line of hiigh pressure stage compressor 2, the E of cross valve 3 is to connecing evaporimeter 11 gas outlets, and the gas outlet of condenser 4 is connected with the air inlet of evaporimeter 11 by throttling arrangement.
Low-pressure stage compressor 1 is connected in parallel in return line, the air entry of low-pressure stage compressor 1 is connected in the return line of hiigh pressure stage compressor 2, the exhaust outlet of low-pressure stage compressor 1 is connected with the air entry of hiigh pressure stage compressor 2, low-temp low-pressure gas in return line is after the compression of low-pressure stage compressor 1 forms medium temperature and medium pressure gas, then the air entry by hiigh pressure stage compressor 2 enters in hiigh pressure stage compressor 2 and compresses for the second time.
Throttling arrangement comprises the flash vessel pipeline being connected between condenser 4 and evaporimeter 11, the refrigeration electric expansion valve 9 in parallel with flash vessel pipeline, refrigeration electric expansion valve 9 when air conditioner low temperature heating moves in closed condition, flash vessel pipeline comprises flash vessel 8, the inlet of flash vessel 8 is connected with evaporimeter 11, the liquid outlet of flash vessel 8 is connected with condenser 4, and the gas outlet of flash vessel 8 is connected with the air entry of hiigh pressure stage compressor 2.
Flash vessel pipeline also comprises the auxiliary electric expansion valve 6 that heats being connected on flash vessel 8 inlets, be connected to and on flash vessel 8 liquid outlets, heat main electric expansion valve 10, and be connected to the magnetic valve 7 on flash vessel 8 gas outlets, the access point of magnetic valve 7 in hiigh pressure stage compressor 2 return line is at the exhaust outlet of hiigh pressure stage compressor 2 air entries and low-pressure stage compressor 1 between the access point in hiigh pressure stage compressor 2 return line, check valve 14 is connected between the air entry access point and exhaust outlet access point of low-pressure stage compressor 1, wherein heat auxiliary electric expansion valve 6, magnetic valve 7 and heat main electric expansion valve 10 be closed condition when air conditioner refrigerating moves.
The air source low-temperature two-stage compression heat pump air-conditioning of the present embodiment, specific works process is as follows:
During refrigeration: low-pressure stage compressor 1, heat auxiliary electric expansion valve 6, magnetic valve 7 and heat main electric expansion valve 10 and close, the solenoid no power of cross valve 3, now the D of cross valve 3 to E to conducting, C to S to conducting, cold-producing medium is compressed into high temperature and high pressure gas by hiigh pressure stage compressor 2, and enter condenser 4 by cross valve 3, high temperature and high pressure gas is condensed into high pressure refrigerant liquid in condenser 4, from condenser 4 high pressure refrigerant liquid out, after 9 throttlings of refrigeration electric expansion valve, become low-temp low-pressure liquid and enter evaporimeter 11, in evaporimeter 11, low temperature low pressure liquid refrigerants absorbs the heat in low temperature environment and is evaporated to low-pressure gas, and sucked by the air entry of hiigh pressure stage compressor 2 by cross valve 3, and then further after compression, discharge, move in circles like this, form the working cycles loop of sealing.
While heating: refrigeration electric expansion valve 9 is closed, the solenoid energising of cross valve 3, now the D of cross valve 3 to C to conducting, E to S to conducting, when environment temperature is less than or equal to design temperature, magnetic valve 7 is opened, cold-producing medium becomes medium temperature and medium pressure gas by low-pressure stage compressor compresses, then by the air entry of hiigh pressure stage compressor 2, sucked, compress again, form the gas of HTHP, by cross valve 3, enter evaporimeter 11, in evaporimeter 11, the gas of HTHP is passed to heat behind indoor, be condensed into highly pressurised liquid, from evaporimeter 11 high pressure refrigerant liquid process out, heat the reducing pressure by regulating flow for the first time of main electric expansion valve 10, become the gas liquid mixture of medium temperature and medium pressure, then enter flash vessel 8, in flash vessel 8, carry out gas-liquid two and resemble separation, in a part of separating, compression refrigerant gas outputs to the return line of hiigh pressure stage compressor 2 from the gas outlet of flash vessel 8 by magnetic valve 7, air entry by hiigh pressure stage compressor 2 sucks, and and compress again after the medium pressure gas mixing of low-pressure stage compressor 1 discharge, the refrigerant liquid being separated enters into and heats auxiliary electric expansion valve 6 from the liquid outlet of flash vessel 8, carry out becoming low-temp low-pressure liquid after second throttle step-down and enter condenser 4, in condenser 4, low temperature low pressure liquid refrigerants absorbs the heat in low temperature environment and is evaporated to low-pressure gas, then after being compressed into medium pressure gas, the air entry that enters again low-pressure stage compressor 1 by cross valve 3 discharges, move in circles like this, form the working cycles loop of sealing.
Below only with regard to the utility model preferred embodiment, be described, but can not be interpreted as it is the restriction to the utility model protection domain.The utility model is not only confined to above embodiment, and its concrete structure or shape allow to change.In a word, protection domain of the present utility model should comprise those apparent conversion or alternative and remodeling to those skilled in the art.
Claims (10)
1. an air source low-temperature two-stage compression heat pump air-conditioning, comprise compressor, outdoor heat exchanger, indoor heat exchanger, cross valve and throttling arrangement, described compressor comprises hiigh pressure stage compressor, be connected to the low-pressure stage compressor in the return line of described hiigh pressure stage compressor, the exhaust outlet of described low-pressure stage compressor is connected with the air entry of described hiigh pressure stage compressor, low-temp low-pressure gas in described return line is after the compression of described low-pressure stage compressor, then the air entry by described hiigh pressure stage compressor enters in described hiigh pressure stage compressor and carries out second-compressed.
2. air source low-temperature two-stage compression heat pump air-conditioning according to claim 1, it is characterized in that, described a kind of air source low-temperature two-stage compression heat pump air-conditioning also comprises the flash vessel being connected between described indoor heat exchanger and described indoor heat exchanger, and the gas outlet of described flash vessel is connected with the air entry of described hiigh pressure stage compressor.
3. air source low-temperature two-stage compression heat pump air-conditioning according to claim 2, is characterized in that, the inlet of described flash vessel is connected with described indoor heat exchanger, and the liquid outlet of described flash vessel is connected with described outdoor heat exchanger.
4. air source low-temperature two-stage compression heat pump air-conditioning according to claim 3, it is characterized in that, described flash vessel is arranged on described flash vessel pipeline, between described indoor heat exchanger and described indoor heat exchanger, be also provided with refrigeration electric expansion valve, described refrigeration electric expansion valve is in parallel with described flash vessel pipeline.
5. air source low-temperature two-stage compression heat pump air-conditioning according to claim 4, it is characterized in that, described flash vessel pipeline also comprises and is connected to heating auxiliary electric expansion valve, be connected on described flash vessel liquid outlet and heat main electric expansion valve on described flash vessel inlet.
6. air source low-temperature two-stage compression heat pump air-conditioning according to claim 5, is characterized in that, described flash vessel pipeline also comprises the magnetic valve being connected on described flash vessel gas outlet.
7. air source low-temperature two-stage compression heat pump air-conditioning according to claim 4, is characterized in that, described refrigeration electric expansion valve when air conditioner low temperature heating moves in closed condition.
8. air source low-temperature two-stage compression heat pump air-conditioning according to claim 6, is characterized in that, described in heat auxiliary electric expansion valve, magnetic valve and heat main electric expansion valve and when air conditioner refrigerating moves, be closed condition.
9. air source low-temperature two-stage compression heat pump air-conditioning according to claim 1, is characterized in that, in described return line, is provided with check valve.
10. air source low-temperature two-stage compression heat pump air-conditioning according to claim 1, it is characterized in that, described a kind of air source low-temperature two-stage compression heat pump air-conditioning also comprises controller, described outdoor heat exchanger is condenser, described indoor heat exchanger is evaporimeter, and described low-pressure stage compressor and described hiigh pressure stage compressor are directly also provided with intercooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320448527.1U CN203464542U (en) | 2013-07-26 | 2013-07-26 | Air source low-temperature two-stage compression heat pump air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320448527.1U CN203464542U (en) | 2013-07-26 | 2013-07-26 | Air source low-temperature two-stage compression heat pump air conditioner |
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| CN203464542U true CN203464542U (en) | 2014-03-05 |
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| CN201320448527.1U Expired - Fee Related CN203464542U (en) | 2013-07-26 | 2013-07-26 | Air source low-temperature two-stage compression heat pump air conditioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411353A (en) * | 2013-07-26 | 2013-11-27 | 宁波奥克斯空调有限公司 | Air-source low-temperature twin-stage compression heat pump air conditioner |
| CN103954067A (en) * | 2014-04-15 | 2014-07-30 | 珠海格力电器股份有限公司 | Refrigerating device |
| CN107461961A (en) * | 2017-07-28 | 2017-12-12 | 江苏科技大学 | The double flash evaporation two stages of compression formula heat pump assembly and method of work of a kind of double thermals source |
| CN110243102A (en) * | 2019-07-10 | 2019-09-17 | 上海加冷松芝汽车空调股份有限公司 | A kind of refrigeration and heating system and its control method |
-
2013
- 2013-07-26 CN CN201320448527.1U patent/CN203464542U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411353A (en) * | 2013-07-26 | 2013-11-27 | 宁波奥克斯空调有限公司 | Air-source low-temperature twin-stage compression heat pump air conditioner |
| CN103954067A (en) * | 2014-04-15 | 2014-07-30 | 珠海格力电器股份有限公司 | Refrigerating device |
| CN103954067B (en) * | 2014-04-15 | 2016-06-08 | 珠海格力电器股份有限公司 | Refrigeration plant |
| CN107461961A (en) * | 2017-07-28 | 2017-12-12 | 江苏科技大学 | The double flash evaporation two stages of compression formula heat pump assembly and method of work of a kind of double thermals source |
| CN107461961B (en) * | 2017-07-28 | 2019-09-27 | 江苏科技大学 | A kind of the double flash evaporation two stages of compression formula heat pump assembly and working method of double heat sources |
| CN110243102A (en) * | 2019-07-10 | 2019-09-17 | 上海加冷松芝汽车空调股份有限公司 | A kind of refrigeration and heating system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170503 Address after: 315000 Yinzhou District Province, Ningbo City, Jiang Shan town on the village of summer ho Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: NINGBO AUX AIR-CONDITION Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20210726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |