EP2426437A2 - Ultra low temperature heat pump system with secondary refrigerant injection mechanism - Google Patents
Ultra low temperature heat pump system with secondary refrigerant injection mechanism Download PDFInfo
- Publication number
- EP2426437A2 EP2426437A2 EP11005781A EP11005781A EP2426437A2 EP 2426437 A2 EP2426437 A2 EP 2426437A2 EP 11005781 A EP11005781 A EP 11005781A EP 11005781 A EP11005781 A EP 11005781A EP 2426437 A2 EP2426437 A2 EP 2426437A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- valve
- economizer
- heat pump
- low temperature
- 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.)
- Withdrawn
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Classifications
-
- 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
- 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
Definitions
- the invention relates to air conditioning systems and particularly relates to an ultra low temperature heat pump system with secondary air injection mechanism.
- An object of the invention is to provide an ultra low temperature heat pump system with secondary air injection mechanism , which is novel in structure and utility, utilizes air refilling technique whereby the range of the working temperature of the compressor is expanded and the stability as well as efficiency of the heat pump is improved.
- an ultra low temperature heat pump system with secondary air injection mechanism which comprises a compressor, a condenser, a reservoir tank, a thermal expansion valve, a vaporizer and a separator connected sequencially to form a circulation loop.
- An air refill device is provided between the compressor and the reservoir tank which comprises an injection valve, a economizer, a first solenoid valve and a second solenoid valve; the two solenoid valves are arranged in parallel with the first solenoid valve connected to the compressor directly and the second solenoid valve connected to the injection valve and the economizer sequentially, the economizer is then connected to the compressor.
- the compressor is provided with an air refilling inlet to which the first solenoid valve and the economizer are connected.
- the economizer is a dual loop plate heat exchanger in which the respective ends of one loop is connected to the injection valve and the air refilling inlet, the respective ends of the other loop is connected to the reservoir tank and the thermal expansion valve.
- the ultra low temperature heat pump system of the invention is advantageous in that by providing the air refilling device , the working temperature of the heat pump is greatly expanded, i.e., the compressor can work normally above an ambient temperature as low as -30 Celsius.
- the heat pump in this invention has improved working stability and high efficiency and therefore can be used in the low temperature areas.
- FIG. 1 is a schematic illustration of the heat pump according to one embodiment of the invention.
- an ultra low temperature heat pump system with secondary air injection mechanism comprises a compressor 1, a condenser 2, a reservoir tank 3, a thermal expansion valve 4, a vaporizer 5 and a separator 16, which are sequentially connected to form a circulation loop.
- An air refill device is provided between the compressor 1 and the reservoir tank 3, which is comprised of an injection valve 6, an economizer 7, a first solenoid valve 8 and a second solenoid valve 9 ;the two solenoid valves are arranged in parallel with the first solenoid valve 8 connected to the compressor 1 directly and the second solenoid valve 9 connected to the injection valve 6 and the economizer 7 sequentially , the economizer 7 is then connected to the compressor 1.
- the compressor 1 is provided thereon an air refilling inlet VI to which the first solenoid valve 8 and the economizer 7 are connected.
- the economizer 7 is preferably a dual loop plate heat exchanger in which the two ends of one loop is connected to the injection valve 6 and the air refilling inlet respectively and the two ends of the other loop is connected to the reservoir tank 3 and the thermal expansion valve 4 respectively.
- a four way valve 10 is provided through which the discharge port D of the compressor 1 is connected to the condenser 1, also by the four way valve, the vaporizer 5 is connected to and through the separator 16 to the suction port S of the compressor 1.
- the compressor 1 and the separator 16 are provided with respective sight glass 12, 13 for viewing the status of the working medium circulated therethrough.
- the heat pump is also provided with a plurality number of pressure monitoring port.
- Capillary tube 15 is provided between the first solenoid valve 8 and the compressor 1 , i.e. if the primary injection realized by injection valve 6 is insufficient, the first solenoid valve 8 is activated and a secondary injection by the capillary tube is realized whereby the discharge temperature of the compressor is controllable and adjustable.
- the ultra low temperature heat pump system with secondary air injection mechanism is operating in the following manner:
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
Description
- The invention relates to air conditioning systems and particularly relates to an ultra low temperature heat pump system with secondary air injection mechanism.
- Today, the working temperature of conventional air source heat pumps is normally in the range of -7 to 43 degree Celsius. In the low temperature areas such as the northern part of this country however heat pumps of this kind can not working properly due to the low ambient temperature, therefore, there is a need for an improved heat pump with expanded working temperature range in the art.
- An object of the invention is to provide an ultra low temperature heat pump system with secondary air injection mechanism , which is novel in structure and utility, utilizes air refilling technique whereby the range of the working temperature of the compressor is expanded and the stability as well as efficiency of the heat pump is improved.
- According to one aspect of the invention, an ultra low temperature heat pump system with secondary air injection mechanism is provided which comprises a compressor, a condenser, a reservoir tank, a thermal expansion valve, a vaporizer and a separator connected sequencially to form a circulation loop. An air refill device is provided between the compressor and the reservoir tank which comprises an injection valve, a economizer, a first solenoid valve and a second solenoid valve; the two solenoid valves are arranged in parallel with the first solenoid valve connected to the compressor directly and the second solenoid valve connected to the injection valve and the economizer sequentially, the economizer is then connected to the compressor.
- Preferably and additionally, the compressor is provided with an air refilling inlet to which the first solenoid valve and the economizer are connected.
- Preferably and additionally, the economizer is a dual loop plate heat exchanger in which the respective ends of one loop is connected to the injection valve and the air refilling inlet, the respective ends of the other loop is connected to the reservoir tank and the thermal expansion valve.
- The ultra low temperature heat pump system of the invention is advantageous in that by providing the air refilling device , the working temperature of the heat pump is greatly expanded, i.e., the compressor can work normally above an ambient temperature as low as -30 Celsius. Compared with the conventional heat pumps, the heat pump in this invention has improved working stability and high efficiency and therefore can be used in the low temperature areas.
-
Figure 1 is a schematic illustration of the heat pump according to one embodiment of the invention. - The invention will now be described further in details with reference to the drawing as accompanied.
- In one embodiment of the invention according to
figure 1 , an ultra low temperature heat pump system with secondary air injection mechanism is provided, the system comprises acompressor 1, acondenser 2, areservoir tank 3, a thermal expansion valve 4, avaporizer 5 and aseparator 16, which are sequentially connected to form a circulation loop. An air refill device is provided between thecompressor 1 and thereservoir tank 3, which is comprised of aninjection valve 6, aneconomizer 7, a first solenoid valve 8 and asecond solenoid valve 9 ;the two solenoid valves are arranged in parallel with the first solenoid valve 8 connected to thecompressor 1 directly and thesecond solenoid valve 9 connected to theinjection valve 6 and theeconomizer 7 sequentially , theeconomizer 7 is then connected to thecompressor 1. - In this embodiment, the
compressor 1 is provided thereon an air refilling inlet VI to which the first solenoid valve 8 and theeconomizer 7 are connected. Theeconomizer 7 is preferably a dual loop plate heat exchanger in which the two ends of one loop is connected to theinjection valve 6 and the air refilling inlet respectively and the two ends of the other loop is connected to thereservoir tank 3 and the thermal expansion valve 4 respectively. A fourway valve 10 is provided through which the discharge port D of thecompressor 1 is connected to thecondenser 1, also by the four way valve, thevaporizer 5 is connected to and through theseparator 16 to the suction port S of thecompressor 1. Thecompressor 1 and theseparator 16 are provided withrespective sight glass 12, 13 for viewing the status of the working medium circulated therethrough. The heat pump is also provided with a plurality number of pressure monitoring port.Capillary tube 15 is provided between the first solenoid valve 8 and thecompressor 1 , i.e. if the primary injection realized byinjection valve 6 is insufficient, the first solenoid valve 8 is activated and a secondary injection by the capillary tube is realized whereby the discharge temperature of the compressor is controllable and adjustable. - The ultra low temperature heat pump system with secondary air injection mechanism is operating in the following manner:
- 1) the coolant is compressed in the
compressor 1 to the high temperature and high pressure state , which is then transported through the discharge port D of the compressor1 and through the four way valve into thecondenser 2 for heat exchanging. During the heat exchange process it is transformed into liquid with moderate temperature and high pressure and is discharged by thecondenser 2 to the reservoir tank3. - 2) the coolant flew from the
reservoir tank 3 is transported through the sight glass11, and then through theeconomiser 7 for heat exchange , to the thermal expansion valve 4 and then flow into and through thevaporizer 5 and theseparator 16 back through the refilling inlet to thecompressor 1. - (3) when the pressure in the
compressor 1 is below the working pressure, the coolant remained can be throttled by the first solenoid valve8; after passing through the second solenoid valve9; the coolant is throttled and injected by the injection valve6 into high temperature low pressure gaseous flow in which a small amount of liquid resides , the flow is then forced into theeconomizer 7 for heat exchanging by which the liquid portion is vaporized and forced into the refilling inlet of thecompressor 1 for gas refilling. - Although the preferred embodiments of the invention are explained in detail, it is to be understood that other embodiments are contemplated. Accordingly, it is not intended that the invention is limited in the scope to the details of constriction and arrangement of components. The invention is capable of other embodiments and of being practiced or carried our in various ways.
Claims (4)
- An ultra low temperature heat pump system with secondary air injection mechanism, comprising a compressor (1), a condenser (2), a reservoir tank(3), a thermal expansion valve(4), a vaporizer (5) and a separator (16) which are connected sequentially to form a circulation loop, characterized in that a air refill device is arranged between the compressor (1) and the reservoir tank (3) which comprising a injection valve (6), a economizer (7), a first solenoid valve (8) and a second solenoid valve (9) with the two solenoid valves arranged in parallel in which the first solenoid valve (8) is connected to the compressor(1)directly and the second solenoid valve (9) connected to the injection valve (6) and the economizer (7) sequentially, the economizer (7) is then connected to the compressor (1).
- The ultra low temperature heat pump system with secondary air injection mechanism according to claim 1 characterized in that the compressor (1) is provided with an air refilling inlet to which the first solenoid valve (8) and the economizer (7) is connected.
- The ultra low temperature heat pump system with secondary air injection mechanism according to claim 2 characterized in that the economizer (7) is a dual loop plate heat exchanger with the respective ends of one loop connected to the injection valve (6) and the air refilling inlet, and the respective ends of the other loop connected to the reservoir tank (3) and the thermal expansion valve (4).
- The ultra low temperature heat pump system with secondary air injection mechanism according to any of 1 to 3, characterized in that the outlet of the compressor (1) is connected to a four way valve through which the compressor (1) is connected to the condenser (2), and the vaporizer (5) is connected to the separator (16), the separator (16) is then connected to the air refilling inlet.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010270325 CN101922823A (en) | 2010-09-02 | 2010-09-02 | Secondary air injection high-efficiency ultralow temperature heat pump unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2426437A2 true EP2426437A2 (en) | 2012-03-07 |
EP2426437A3 EP2426437A3 (en) | 2015-03-11 |
Family
ID=43337908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11005781.7A Withdrawn EP2426437A3 (en) | 2010-09-02 | 2011-07-14 | Ultra low temperature heat pump system with secondary refrigerant injection mechanism |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2426437A3 (en) |
CN (1) | CN101922823A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111426101A (en) * | 2020-03-16 | 2020-07-17 | 科希曼电器有限公司 | Air source heat pump device capable of stably running in ultralow-temperature environment and control system thereof |
CN112665226A (en) * | 2020-12-15 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
Families Citing this family (11)
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CN102588254A (en) * | 2012-02-22 | 2012-07-18 | 北京工业大学 | Single dual-stage hermetically sealed refrigerating compressor with external mixing chamber |
CN102818393A (en) * | 2012-06-12 | 2012-12-12 | 徐亚红 | Low-temperature total-heat recovery type modular air-cooled heat pump unit |
CN103017503A (en) * | 2012-12-28 | 2013-04-03 | 广州德能热源设备有限公司 | Split type heat pump drying machine set |
CN103471275B (en) * | 2013-08-30 | 2017-12-19 | 青岛海信日立空调系统有限公司 | Enhanced vapor injection air-conditioning circulating system and its control method |
CA2954787A1 (en) | 2014-09-05 | 2016-03-10 | Danfoss A/S | A method for controlling a variable capacity ejector unit |
CN107923666B (en) | 2015-08-14 | 2020-08-14 | 丹佛斯有限公司 | Vapor compression system having at least two evaporator groups |
MX2018004604A (en) | 2015-10-20 | 2018-07-06 | Danfoss As | A method for controlling a vapour compression system in ejector mode for a prolonged time. |
CN108139132B (en) | 2015-10-20 | 2020-08-25 | 丹佛斯有限公司 | Method for controlling a vapor compression system with variable receiver pressure set point |
CN105674627A (en) * | 2016-03-28 | 2016-06-15 | 侴乔力 | Steam modulator driven by water source heat pump |
CN110455013A (en) * | 2018-05-08 | 2019-11-15 | 上海海立电器有限公司 | Air injection enthalpy-increasing heat pump system |
DK180146B1 (en) | 2018-10-15 | 2020-06-25 | Danfoss As Intellectual Property | Heat exchanger plate with strenghened diagonal area |
Family Cites Families (13)
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US5157933A (en) * | 1991-06-27 | 1992-10-27 | Carrier Corporation | Transport refrigeration system having means for achieving and maintaining increased heating capacity |
US6571576B1 (en) * | 2002-04-04 | 2003-06-03 | Carrier Corporation | Injection of liquid and vapor refrigerant through economizer ports |
CA2604465A1 (en) * | 2005-05-04 | 2006-11-09 | Carrier Corporation | Refrigerant system with variable speed scroll compressor and economizer circuit |
CN100366992C (en) * | 2005-11-25 | 2008-02-06 | 珠海格力电器股份有限公司 | Low-temperature air-conditioning heat pump system and method for reducing temperature regulation fluctuation by using same |
JP4715561B2 (en) * | 2006-03-06 | 2011-07-06 | ダイキン工業株式会社 | Refrigeration equipment |
CN101568776B (en) * | 2006-10-27 | 2011-03-09 | 开利公司 | Economized refrigeration cycle with expander |
EP2165124A4 (en) * | 2007-05-14 | 2013-05-29 | Carrier Corp | Refrigerant vapor compression system with flash tank economizer |
EP2153139A4 (en) * | 2007-05-23 | 2012-10-10 | Carrier Corp | Refrigerant injection above critical point in a transcritical refrigerant system |
WO2008152760A1 (en) * | 2007-06-11 | 2008-12-18 | Daikin Industries, Ltd. | Refrigeration device |
CN201265977Y (en) * | 2008-08-26 | 2009-07-01 | 广西诚基永信太阳能科技工程有限公司 | Air source heat pump units with air compensating pipeline |
CN201476406U (en) * | 2009-09-04 | 2010-05-19 | 大连中星科技开发有限公司 | Low-temperature quasi-two-stage air source heat pump unit |
CN101776342A (en) * | 2010-01-25 | 2010-07-14 | 大连三洋压缩机有限公司 | Low-temperature heat pump system |
CN201772678U (en) * | 2010-09-02 | 2011-03-23 | 广州德能热源设备有限公司 | Pulse air-injection high-efficient ultralow-temperature heat pump unit |
-
2010
- 2010-09-02 CN CN 201010270325 patent/CN101922823A/en active Pending
-
2011
- 2011-07-14 EP EP11005781.7A patent/EP2426437A3/en not_active Withdrawn
Non-Patent Citations (1)
Title |
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None |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111426101A (en) * | 2020-03-16 | 2020-07-17 | 科希曼电器有限公司 | Air source heat pump device capable of stably running in ultralow-temperature environment and control system thereof |
CN112665226A (en) * | 2020-12-15 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
CN112665226B (en) * | 2020-12-15 | 2024-04-12 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP2426437A3 (en) | 2015-03-11 |
CN101922823A (en) | 2010-12-22 |
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