CN100366992C - Low-temperature air conditioner heat pump system and method for decreasing temperature regulation fluctuation by employing the same - Google Patents

Low-temperature air conditioner heat pump system and method for decreasing temperature regulation fluctuation by employing the same Download PDF

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Publication number
CN100366992C
CN100366992C CNB2005101017087A CN200510101708A CN100366992C CN 100366992 C CN100366992 C CN 100366992C CN B2005101017087 A CNB2005101017087 A CN B2005101017087A CN 200510101708 A CN200510101708 A CN 200510101708A CN 100366992 C CN100366992 C CN 100366992C
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China
Prior art keywords
compressor
evi
temperature
heat pump
electric expansion
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CNB2005101017087A
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CN1800747A (en
Inventor
苏玉海
刘桂平
孙常权
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CNB2005101017087A priority Critical patent/CN100366992C/en
Publication of CN1800747A publication Critical patent/CN1800747A/en
Priority to PCT/CN2006/003165 priority patent/WO2007059709A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2509—Economiser valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2101—Temperatures in a bypass

Abstract

The present invention relates to the field of an air-conditioning heat pump with an air source, particularly to a low temperature air-conditioning heat pump system with good heating effect in the working condition of outdoor low temperature, and a method for reducing temperature and adjusting fluctuation thereof. The low temperature air-conditioning heat pump system comprises a reservoir, a gas and liquid separator, an auxiliary cooling coil, a four-way valve, a heat exchanger for an outdoor machine, an electronic expansion valve for the outdoor machine, and an air supplying system for a compressor. The low temperature air-conditioning heat pump system of the present invention uses an air-jet digital eddy compressor and the air supplying system for a compressor. When the temperature of the outdoor environment is lower than zero DEG C, the air supplying system for a compressor in a machine set exerts action, an EVI electromagnetic valve is opened to replenish saturated refrigerant gas with intermediate pressure to the compressor so that two-stage compression is implemented in the compressor so as to increase the heating capacity and the energy efficiency ratio of the machine set in the working condition of outdoor low temperature.

Description

Low-temperature air conditioner heat pump system and the method for using this system's reduction adjustment to fluctuate
[technical field]
The present invention relates to the air source heat pump air-conditioner field, relate in particular to a kind of method that under outdoor worst cold case, has the low-temperature air conditioner heat pump system of good heating effect and reduce the adjustment fluctuation.
[background technology]
At present, the normal air source heat pump air-conditioner unit of selling on the market is under the operating mode of outdoor low temperature, the heating capacity decay is very serious, even can't normally start operation, and can only use at transition season at the northern China cold district, can't satisfy basic heat demand in the winter of cold.Therefore, generally still adopt traditional central heating mode in the area of cold, and these heating systems all can't reach the requirement of social development based on coal-fired, combustion gas at energy-saving and environmental protection, secure context.Some air-conditioner producer provides a kind of at heat pump assembly now, it has spray circuits, can carry out defrost efficiently, and the decline of the heating capacity that causes when preventing the defrost operation, as publication number JP2001-263882A, open day is September 26 calendar year 2001, and name is called the patent documentation of heat pump assembly.But the document is not introduced the work opportunity and the control method of spray circuits; Simultaneously, because the development of Compressor Technology, a kind of capacity regulating new technology " enhancing air injection enthalpy-increasing " (English " Enhanced VapourInjection " that is mainly used in screw compressor, abbreviation " EVI "), by " load condition " and " unloaded state " time averaging method being realized the capacity regulating of compressor; Because of the earliest developer U.S. Copeland Corp, be referred to as that " Digital Scroll^TM (paddy wheel digital vortex technology) is called " jet digital scroll compressor " in the industry.The applicant proposes design of the present invention based on above-mentioned condition.
[summary of the invention]
The object of the present invention is to provide a kind of low-temperature air conditioner heat pump system that under outdoor low-temperature working situation, has good heating effect.
Another object of the present invention is to provide a kind of method of using above-mentioned low-temperature air conditioner heat pump system to reduce the adjustment fluctuation.
For achieving the above object, the present invention adopts following technical scheme:
A kind of low-temperature air conditioner heat pump system, comprise reservoir, gas-liquid separator, secondary cooling coil, cross valve, off-premises station heat exchanger and off-premises station electric expansion valve and a compressor air compensating system, described compressor air compensating system comprises EVI magnetic valve, EVI electric expansion valve, the compressor that is provided with gas supplementing opening, reservoir, above-mentioned reservoir is connected with EVI magnetic valve, EVI electric expansion valve, compressor is connected with the EVI magnetic valve, and described compressor air compensating system also comprises two temperature-sensitive bags; Described reservoir utilizes metal tube to be connected with EVI magnetic valve, EVI electric expansion valve, compressor utilizes metal tube to be connected with the EVI magnetic valve, one of temperature-sensitive bag is placed on compressor is connected usefulness with the EVI magnetic valve metal tube surface, and another is placed on reservoir and is connected with the EVI electric expansion valve and uses the metal tube surface.
A kind of method that reduces the fluctuation of air conditioner heat pump system adjustment comprises the first step: compressor, reservoir, gas-liquid separator, secondary cooling coil, cross valve, off-premises station heat exchanger, off-premises station electric expansion valve, EVI magnetic valve, EVI electric expansion valve and two temperature-sensitive bags of preparing to be provided with gas supplementing opening respectively; Second step: one of temperature-sensitive bag is placed on compressor is connected usefulness with the EVI magnetic valve metal tube surface, and another is placed on reservoir and is connected with the EVI electric expansion valve and uses the metal tube surface; The 3rd step: in system, set a target degree of superheat; The 4th step: the temperature value that two temperature-sensitive bags are measured subtracts each other and draws first temperature gap; The 5th step: the aperture that draws second temperature gap and control the EVI electric expansion valve of subtracting each other of utilizing above-mentioned first temperature gap and the target degree of superheat.
Compared with prior art, low-temperature air conditioner heat pump of the present invention system adopts jet digital scroll compressor and compressor air compensating system, when outdoor environment temperature is lower than zero degree, the compressor air compensating system plays a role in the unit, the EVI magnetic valve is opened the saturated refrigerant gas that replenishes intermediate pressure to compressor, in inner twin-stage compression, heating capacity and the Energy Efficiency Ratio of raising unit under outdoor worst cold case of realizing of compressor.
[description of drawings]
Fig. 1 is the internal structure schematic diagram of low-temperature air conditioner heat pump of the present invention system;
Fig. 2 is low-temperature air conditioner heat pump system of the present invention heating operation pressure-enthalpy chart when the EVI magnetic valve is opened.
[specific embodiment]
See also shown in Figure 1ly, a kind of low-temperature air conditioner heat pump system 1 comprises reservoir 12, gas-liquid separator 15, secondary cooling coil 19, cross valve 16, off-premises station heat exchanger 17 and off-premises station electric expansion valve 18 and a compressor air compensating system.The compressor air compensating system comprises EVI magnetic valve 14, EVI electric expansion valve 13, is provided with the compressor 9 and the reservoir 12 of gas supplementing opening, and above-mentioned reservoir 12 is connected with EVI magnetic valve 14, EVI electric expansion valve 13, and compressor 9 is connected with EVI magnetic valve 14.
For better enforcement the present invention, the compressor air compensating system can also comprise two temperature-sensitive bags 20,21.In the present embodiment, the temperature-sensitive bag is a thermistor, and compressor is jet digital scroll compressor.Reservoir 12 utilizes metal tube to be connected with EVI magnetic valve 14, EVI electric expansion valve 13, compressor 9 utilizes metal tube to be connected with EVI magnetic valve 14, temperature-sensitive bag 20 is placed on compressor 9 is connected usefulness with EVI magnetic valve 14 metal tube surface, and temperature-sensitive bag 21 is placed on reservoir 12 and is connected with EVI electric expansion valve 13 and uses the metal tube surface.
Seeing also shown in Figure 2ly, preferably all is to connect by copper pipe between each parts in the low-temperature air conditioner heat pump system 1.The low-temperature air conditioner heat pump system is when heating operation, compressor 9 is compressed to the refrigerant gas (state point 1) of the low-temp low-pressure that is evaporated from the off-premises station heat exchanger state point 2 of intermediate pressure, gas (state point 9) with the intermediate pressure that sucks from the compressor gas supplementing opening in the scroll plate of compressor 9 is mixed into state point 10, continue then by the gas of compressor boil down to HTHP (state point 3), the refrigerant liquid (state point 4) that the refrigerant gas of HTHP is cooled in indoor set heat exchanger 22 and is condensed into HTHP, highly pressurised liquid is to enter fluid reservoir 12 behind the gas-liquid mixture (state point 5) of intermediate pressure by indoor set electric expansion valve 4 and 13 throttlings of EVI electric expansion valve, the part of refrigerant flash distillation is that the refrigerant gas (state point 9) of intermediate pressure is sucked by the compressor gas supplementing opening in fluid reservoir 12, another part cold-producing mediums are then crossed and coldly are throttled to state point 8 by off-premises station electric expansion valve 18 for the subcooled liquid of intermediate pressure (state point 7) in the fluid reservoir 12, the outer machine heat exchanger 17 of inlet chamber is evaporated to state point 1 and is sucked by the compressor air entry then, finishes one and heats circulation.
A kind of method that reduces the fluctuation of air conditioner heat pump system adjustment comprises the first step: compressor, reservoir, gas-liquid separator, secondary cooling coil, cross valve, off-premises station heat exchanger, off-premises station electric expansion valve, EVI magnetic valve, EVI electric expansion valve and two temperature-sensitive bags of preparing to be provided with gas supplementing opening respectively; Second step: one of temperature-sensitive bag is placed on compressor is connected usefulness with the EVI magnetic valve metal tube surface, and another is placed on reservoir and is connected with the EVI electric expansion valve and uses the metal tube surface; The 3rd step: in system, set a target degree of superheat; The 4th step: the temperature value that two temperature-sensitive bags are measured subtracts each other and draws first temperature gap; The 5th step: the aperture that draws second temperature gap and control the EVI electric expansion valve of subtracting each other of utilizing above-mentioned first temperature gap and the target degree of superheat.
The present invention has introduced and has utilized the compressor air compensating system to reduce air conditioner heat pump system heating capacity decay when low-temperature working, and this can not be considered to the restriction to claim of the present invention.If those skilled in the art has made change unsubstantiality, conspicuous or improvement according to the present invention, all should belong to the scope of claim protection of the present invention.

Claims (5)

1. low-temperature air conditioner heat pump system, comprise reservoir, gas-liquid separator, secondary cooling coil, cross valve, off-premises station heat exchanger and off-premises station electric expansion valve and a compressor air compensating system, described compressor air compensating system comprises EVI magnetic valve, EVI electric expansion valve, the compressor that is provided with gas supplementing opening, reservoir, above-mentioned reservoir is connected with EVI magnetic valve, EVI electric expansion valve, compressor is connected with the EVI magnetic valve, it is characterized in that: described compressor air compensating system also comprises two temperature-sensitive bags; Described reservoir utilizes metal tube to be connected with EVI magnetic valve, EVI electric expansion valve, compressor utilizes metal tube to be connected with the EVI magnetic valve, one of temperature-sensitive bag is placed on compressor is connected usefulness with the EVI magnetic valve metal tube surface, and another is placed on reservoir and is connected with the EVI electric expansion valve and uses the metal tube surface.
2. low-temperature air conditioner heat pump according to claim 1 system, it is characterized in that: described compressor is jet digital scroll compressor.
3. a method that reduces the fluctuation of air conditioner heat pump system adjustment comprises the first step: compressor, reservoir, gas-liquid separator, secondary cooling coil, cross valve, off-premises station heat exchanger, off-premises station electric expansion valve, EVI magnetic valve, EVI electric expansion valve and two temperature-sensitive bags of preparing to be provided with gas supplementing opening respectively; Second step: one of temperature-sensitive bag is placed on compressor is connected usefulness with the EVI magnetic valve metal tube surface, and another is placed on reservoir and is connected with the EVI electric expansion valve and uses the metal tube surface; The 3rd step: in system, set a target degree of superheat; The 4th step: the temperature value that two temperature-sensitive bags are measured subtracts each other and draws first temperature gap; The 5th step: the aperture that draws second temperature gap and control the EVI electric expansion valve of subtracting each other of utilizing above-mentioned first temperature gap and the target degree of superheat.
4. the method for reduction air conditioner heat pump system adjustment fluctuation according to claim 3, it is characterized in that: described temperature-sensitive bag is a thermistor.
5. the method for reduction air conditioner heat pump system adjustment fluctuation according to claim 3, it is characterized in that: described compressor is jet digital scroll compressor.
CNB2005101017087A 2005-11-25 2005-11-25 Low-temperature air conditioner heat pump system and method for decreasing temperature regulation fluctuation by employing the same Active CN100366992C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CNB2005101017087A CN100366992C (en) 2005-11-25 2005-11-25 Low-temperature air conditioner heat pump system and method for decreasing temperature regulation fluctuation by employing the same
PCT/CN2006/003165 WO2007059709A1 (en) 2005-11-25 2006-11-24 A heat pump system for air conditioning under a low temperature and a using method thereof

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CNB2005101017087A CN100366992C (en) 2005-11-25 2005-11-25 Low-temperature air conditioner heat pump system and method for decreasing temperature regulation fluctuation by employing the same

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CN100366992C true CN100366992C (en) 2008-02-06

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JP5484890B2 (en) * 2009-12-25 2014-05-07 三洋電機株式会社 Refrigeration equipment
CN101922823A (en) * 2010-09-02 2010-12-22 广州德能热源设备有限公司 Secondary air injection high-efficiency ultralow temperature heat pump unit
CN104279789B (en) * 2013-07-11 2017-11-07 东莞市微电环保科技有限公司 A kind of trilogy supply air-conditioning system
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CN103940138B (en) * 2014-04-01 2016-08-17 广东美的暖通设备有限公司 Air-Cooled Heat Pump Unit
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CN106556175A (en) * 2016-11-22 2017-04-05 广东美的暖通设备有限公司 Air-conditioning system and air-conditioning
CN106322814A (en) * 2016-11-22 2017-01-11 广东美的暖通设备有限公司 Air conditioning system and air conditioner
JP6878612B2 (en) * 2017-10-27 2021-05-26 三菱電機株式会社 Refrigeration cycle equipment
CN109405372B (en) * 2018-10-31 2023-12-19 上海爱斯达克汽车空调***有限公司 Throttle multi-port thermal expansion valve assembly and vehicle
CN109654782B (en) * 2018-12-12 2020-06-16 珠海格力电器股份有限公司 Control method and device of electronic expansion valve
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CN110645731A (en) * 2019-10-24 2020-01-03 湖南埃瓦新能源科技有限公司 System for improving energy efficiency of low-temperature air energy heat pump and control method
CN110836417A (en) * 2019-11-18 2020-02-25 珠海格力电器股份有限公司 Air conditioner and air conditioner control method
CN114061056B (en) * 2020-07-28 2023-05-30 广东美的制冷设备有限公司 Air conditioner control method, air conditioner and computer readable storage medium
CN113248106A (en) * 2021-05-17 2021-08-13 深圳德尔科机电环保科技有限公司 Efficient low-temperature enthalpy-increasing control device and method thereof
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CN1800747A (en) 2006-07-12

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