CN201141711Y - Nature working medium refrigeration heat pump - Google Patents

Nature working medium refrigeration heat pump Download PDF

Info

Publication number
CN201141711Y
CN201141711Y CNU2007200992816U CN200720099281U CN201141711Y CN 201141711 Y CN201141711 Y CN 201141711Y CN U2007200992816 U CNU2007200992816 U CN U2007200992816U CN 200720099281 U CN200720099281 U CN 200720099281U CN 201141711 Y CN201141711 Y CN 201141711Y
Authority
CN
China
Prior art keywords
inlet
outlet
heat exchanger
compressor
inner heat
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.)
Expired - Fee Related
Application number
CNU2007200992816U
Other languages
Chinese (zh)
Inventor
宁静红
申江
李慧宇
彭苗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University of Commerce
Original Assignee
Tianjin University of Commerce
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin University of Commerce filed Critical Tianjin University of Commerce
Priority to CNU2007200992816U priority Critical patent/CN201141711Y/en
Application granted granted Critical
Publication of CN201141711Y publication Critical patent/CN201141711Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • F25B2400/12—Inflammable refrigerants

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubricants (AREA)

Abstract

The utility model discloses a natural refrigerant refrigeration and heat pump device, in order to provide a refrigeration and heat pump device that can provide heat source as well as cold source, and has simple structure and convenient operation. The natural refrigerant refrigeration and heat pump device is composed of two single-stage compression refrigeration circulations of both a high temperature circulation side and a low temperature circulation side, wherein the high temperature circulation side is composed of a CO2 compressor, a CO2 oil separator, a CO2 gas cooler, a CO2 internal heat exchanger, a CO2 dry filter, a CO2 expansion valve, and a condensation evaporator; the low temperature circulation side is composed of a R290 compressor, a R290 oil separator, a R290 internal heat exchanger, a R290 dry filter, a R290 expansion valve, and an evaporator, the high temperature circulation is a transcritical circulation, the CO2 is used as the refrigerant; the low temperature circulation is a subcritical circulation, the R290 is used as the refrigerant, the CO2 and the R290 perform heat exchange in the condensation evaporator 7. The natural refrigerant refrigeration and heat pump device adopts green natural CO2 and R290 as refrigerants and has the advantages of simple structure, convenient operation, high efficiency and energy saving.

Description

Natural refrigerant refrigerating heat pump device
Technical field
The utility model relates to a kind of refrigerating heat pump device that low-temperature receiver is provided when thermal source is provided.
Background technology
Present age environmental crisis and natural resources crisis, human health and ecological environment in serious harm, back to nature, exploitation is efficient, environmental protection air conditioner refrigerating working medium has become the common problem of paying close attention to of current international community.Carrying out theory and application study that natural refrigerant substitutes, be not only the needs of global environmental protection, simultaneously, also is the opportunities and challenges that China's refrigeration and air conditioner industry are faced.
In the application of refrigeration heat pump system, all be to freeze respectively and heat, promptly heat by single system, thermal source is provided and, provides low-temperature receiver by single system's refrigeration; If cooling temperature lower (as the liquefaction of oil gas) or heat supply temperature higher (as the drying of article), the performance of system is along with the reduction of cooling temperature and the raising of heat supply temperature reduce accordingly.If use a system, cooling and heat supply simultaneously, the performance of system will improve greatly, but still can not find a kind of suitable cold-producing medium at present, not only satisfy the not too high while of condensing pressure but also satisfy the not too low requirement of evaporating pressure, can adopt the superposition type system this.At present, the relevant personnel once proposed the CO of cooling and heating simultaneously 2/ NH 3Cascade refrigeration heat pump and CO 2/ R290 cascade refrigeration heat pump.The refrigeration heat pump system that above-noted persons propose just carries out the thermal performance analysis theoretically, does not propose the concrete technical scheme of implementing.
The utility model content
The utility model is in order to overcome weak point of the prior art, provides a kind of and provides low-temperature receiver, refrigerating heat pump device simple in structure, easy to operate when thermal source is provided
The utility model is achieved through the following technical solutions:
A kind of natural refrigerant refrigerating heat pump device is characterized in that, comprises by CO 2Compressor, CO 2Oil eliminator, CO 2Gas cooler, CO 2Inner heat exchanger, CO 2Device for drying and filtering, CO 2Two single stage compress kind of refrigeration cycle of high temperature circulation side that expansion valve, condenser/evaporator are formed and the low temperature circulation side be made up of R290 compressor, R290 oil eliminator, R290 inner heat exchanger, R290 device for drying and filtering, R290 expansion valve, evaporimeter constitute, high temperature circulation adopts CO for striding critical cycle 2Be refrigeration working medium, the low temperature circulation is subcritical cycle, and employing R290 is a refrigeration working medium; At high temperature circulation side, CO 2The outlet of compressor and CO 2Oil eliminator connects, CO 2The CO of oil eliminator 2Gas vent and CO 2The pipe side entrance of gas cooler connects, CO 2The pipe side outlet and the CO of gas cooler 2The pipe side entrance of inner heat exchanger connects, CO 2The pipe side outlet of inner heat exchanger is through CO 2Device for drying and filtering and CO 2Expansion valve is connected with the pipe side entrance of condenser/evaporator, the pipe side outlet and the CO of condenser/evaporator 2The shell-side inlet of inner heat exchanger joins CO 2The shell-side outlet and the CO of inner heat exchanger 2The inlet of compressor joins; The water inlet pipe of cooling water is by water pump and stop valve and CO 2The inlet of gas cooler shell-side joins, CO 2The outlet of gas cooler shell-side is connected with the inlet of boiler; Outlet at low temperature circulation side R290 compressor is connected with the inlet of R290 oil eliminator, the R290 gas vent of R290 oil eliminator and the shell-side of condenser/evaporator inlet join, the outlet of condenser/evaporator shell-side is connected with the pipe side entrance of R290 inner heat exchanger, the pipe side outlet of R290 inner heat exchanger is connected with the inlet of evaporimeter with the R290 expansion valve through the R290 device for drying and filtering, the outlet of evaporimeter is connected with the shell-side inlet of R290 inner heat exchanger, the shell-side outlet of R290 inner heat exchanger is joined with the inlet of R290 compressor, and evaporimeter is placed in the household freezer.
For guaranteeing the lubricants capacity of compressor, CO 2The lubricating oil outlet of oil eliminator and CO 2The lubricating oil inlet of compressor connects.The lubricating oil outlet of R290 oil eliminator is connected with the lubricating oil inlet of R290 compressor.
The utlity model has following technique effect:
Refrigerating heat pump device of the present utility model adopts green natural refrigerant CO 2With R290 be cold-producing medium, CO 2Be a kind of environmental sound the naturally occurring material of nature (ODP=0, GWP=1); Has good economy, good security and chemical stability; Nontoxic, do not fire, adapt to various lubricating oil and conventional machinery parts material, can not decompose the generation pernicious gas under the high temperature; Has the thermophysical property that adapts with kind of refrigeration cycle and equipment; CO 2Evaporation latent heat bigger, the refrigerating effect per unit swept volume height.CO 2Stride the higher delivery temperature that gas cooler had of critical cycle and bigger temperature glide and the temperature rise process of cooling medium and be complementary, make it aspect heat pump cycle, have the incomparable advantage of subcritical cycle isothermal condensation process of other working medium.R290 (propane) has good thermal performance, and is cheap, has compatibility with plain oil and frame for movement material, ODP=0, and GWP is very little, does not need to synthesize, and does not change the content of nature hydrocarbon, to not directly influence of greenhouse effects; Main physical character and the R22 of R290 are extremely close, can former machine of R22 and production line not transformed, and directly can propane belongs to direct substitute.Refrigerating heat pump device of the present utility model has heat-production functions in refrigeration, and, simple in structure, easy to operate, energy-efficient, convenient control, safe and reliable.
Description of drawings
Fig. 1 is the utility model natural refrigerant refrigerating heat pump schematic representation of apparatus.
Wherein: 1-CO 2Compressor; 2-CO 2Oil eliminator; 3-CO 2Gas cooler; 4-CO 2Internal heat exchange; 5-CO 2Device for drying and filtering; 6-CO 2Expansion valve; The 7-condenser/evaporator; The 8-R290 compressor; The 9-R290 oil eliminator; The 10-R290 inner heat exchanger; The 11-R290 device for drying and filtering; The 12-R290 expansion valve; The 13-evaporimeter; The 14-household freezer; The 15-boiler; The 16-stop valve; The 17-water pump; The 18-stop valve.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail.
Fig. 1 is the utility model natural refrigerant refrigerating heat pump schematic representation of apparatus, comprises by CO 2Compressor 1, CO 2Oil eliminator 2, CO 2Gas cooler 3, CO 2 Inner heat exchanger 4, CO 2Device for drying and filtering 5, CO 2Two single stage compress kind of refrigeration cycle of high temperature circulation side that expansion valve 6, condenser/evaporator 7 formed and the low temperature circulation side be made up of R290 compressor 8, R290 oil eliminator 9, R290 inner heat exchanger 10, R290 device for drying and filtering 11, R290 expansion valve 12, evaporimeter 13 constitute, high temperature circulation adopts CO for striding critical cycle 2Be refrigeration working medium, the low temperature circulation is subcritical cycle, and employing R290 is a refrigeration working medium, CO 2In condenser/evaporator 7, carry out heat exchange with R290, form superposition type natural refrigerant refrigerating heat pump device.At high temperature circulation side, CO 2The outlet of compressor 1 and CO 2Oil eliminator 2 connects CO 2The CO of oil eliminator 2 2Gas vent and CO 2The pipe side entrance of gas cooler 3 connects, CO 2The pipe side outlet and the CO of gas cooler 2The pipe side entrance of inner heat exchanger 4 connects, CO 2The pipe side outlet of inner heat exchanger is through CO 2Device for drying and filtering 5 and CO 2Expansion valve 6 is connected with the pipe side entrance of condenser/evaporator 7, the pipe side outlet and the CO of condenser/evaporator 2The shell-side inlet of inner heat exchanger joins CO 2The shell-side outlet and the CO of inner heat exchanger 2The inlet of compressor joins.The water inlet pipe of cooling water is by water pump 17 and stop valve 16 and CO 2The inlet of gas cooler 3 shell-sides joins CO 2The outlet of gas cooler shell-side is connected with the inlet of boiler 15.Outlet at low temperature circulation side R290 compressor 8 is connected with the inlet of R290 oil eliminator 9, the R290 gas vent of R290 oil eliminator 9 and the shell-side of condenser/evaporator 7 inlet join, the outlet of condenser/evaporator shell-side is connected with the pipe side entrance of R290 inner heat exchanger 10, the pipe side outlet of R290 inner heat exchanger is connected with the inlet of R290 expansion valve 12 with evaporimeter 13 through R290 device for drying and filtering 11, the outlet of evaporimeter is connected with the shell-side inlet of R290 inner heat exchanger, the shell-side outlet of R290 inner heat exchanger is joined with the inlet of R290 compressor, and evaporimeter 13 is placed in the household freezer 14.
CO 2Gas is at CO 2Compression back pressure raises in the compressor 1, through CO 2Oil eliminator 2 comes out the CO of HTHP with lubricating oil separation 2Gas carries out heat exchange with cooling medium water in gas cooler 3, the cooling back is at CO 2In the inner heat exchanger 4 with CO from the low-temp low-pressure of condenser/evaporator 7 2The gas heat exchange, further cooling is behind the device for drying and filtering 5 of flowing through, through expansion valve 6 throttling step-downs, become low-temp low-pressure liquid and enter condenser/evaporator 7 again, the R290 with the low temperature circulation in condenser/evaporator 7 carries out heat exchange, heat absorption is evaporated, and becomes the gas of low-temp low-pressure, and CO flows through 2Enter CO behind the inner heat exchanger 4 2 Compressor 1 is finished CO 2High temperature circulation.For guaranteeing CO 2The lubricants capacity of compressor 1, CO 2The lubricating oil outlet of oil eliminator and CO 2The lubricating oil inlet of compressor connects, CO 2Oil eliminator 2 isolated lubricating oil utilize difference in height to send CO in time back to 2The crankcase of compressor.R290 gas compresses back pressure and raises in R290 compressor 8, through R290 oil eliminator 9 lubricating oil separation among the R290 is gone out, the R290 gas of HTHP in condenser/evaporator 7 with CO 2Carry out heat exchange, the R290 gas of HTHP is in condenser/evaporator 7 after the condensation, entering R290 inner heat exchanger 10 further lowers the temperature with the R290 gas heat exchange from the low-temp low-pressure of evaporimeter 13, flow through R290 device for drying and filtering 11, again through the 12 throttling step-downs of R290 expansion valve, become low-temp low-pressure liquid and enter evaporimeter 13, in evaporimeter 13 with household freezer 14 in the medium that is cooled carry out heat exchange and absorb heat of vaporization, become the gas of low-temp low-pressure, through R290 inner heat exchanger 10, enter R290 compressor 10, finish the circulation of R290 low temperature.For guaranteeing the lubricants capacity of R290 compressor, the lubricating oil outlet of R290 oil eliminator is connected with the lubricating oil inlet of R290 compressor, and the isolated lubricating oil of R290 oil eliminator utilizes difference in height to send the crankcase of R290 compressor in time back to.CO 2The cooling water of gas cooler 3 is by stop valve 16, water pump 17 controls, and cooling water is at CO 2Flow between the package of gas cooler 3, collect after the heat absorption in the boiler, the hot water in the boiler flows out by the control of hot water exit's stop valve 18, the domestic hot-water can be provided or thermal source is provided.CO 2Flow in the pipe of condenser/evaporator 7, R290 flows between the package of condenser/evaporator, realizes heat exchange.The evaporimeter 13 that is placed in the household freezer 14 absorbs heat, obtains the cold space in the household freezer, and superposition type natural refrigerant refrigerating heat pump device provides low-temperature receiver when thermal source is provided, heat refrigeration simultaneously.
Because CO 2Circulation is for striding critical cycle, CO after compression 2Pressure reaches 9～12MPa, and the said system design can guarantee CO 2Intensity and the reliability of high temperature circulation after pressure raises.
It below is the embodiment experimental result of utilizing the utility model to do.CO 2Compressor 1 is selected the semiclosed CO of Italian DORIN company for use 2Dedicated compressor, what R290 compressor 8 was selected for use is the fully-closed vortex formula refrigeration compressor of U.S. COPELAND company.
Embodiment 1:
Figure Y20072009928100071
Embodiment 2:
Figure Y20072009928100072
Utilize refrigerating heat pump device of the present utility model to can be used as commerce, industry, medical treatment and chemical industry etc., the refrigerating heat pump device that freezes simultaneously and heat.-30 ℃ to-45 ℃ cryogenic temperature environment can be provided in household freezer.According to different experiment needs, by the size that adjusting enters the valve opening degree before the household freezer, control enters the R290 flow of household freezer, regulates the temperature in the experiment household freezer, adapts to different temperature needs.Freezer door is provided with observation window, can observe the situation in the household freezer at any time.Boiler can provide 60 ℃ to 100 ℃ hot water, and boiler is provided with thermometer and temperature shows, and is provided with the cold water of connection, according to needs to heat source temperature, by the cool water quantity in the control adding hot water, the temperature of regulating hot-water supply is to satisfy the needs to the different heat sources temperature environment.
Although relate to a kind of natural refrigerant refrigerating heat pump device and carried out special description disclosed with reference to embodiment, embodiment described above is illustrative and not restrictive, under the situation that does not break away from spirit and scope of the present utility model, all variations and modification are all within scope of the present utility model.

Claims (3)

1, a kind of natural refrigerant refrigerating heat pump device is characterized in that, comprises by CO 2Compressor, CO 2Oil eliminator, CO 2Gas cooler, CO 2Inner heat exchanger, CO 2Device for drying and filtering, CO 2Two single stage compress kind of refrigeration cycle of high temperature circulation side that expansion valve, condenser/evaporator are formed and the low temperature circulation side be made up of R290 compressor, R290 oil eliminator, R290 inner heat exchanger, R290 device for drying and filtering, R290 expansion valve, evaporimeter constitute, high temperature circulation adopts CO for striding critical cycle 2Be refrigeration working medium, the low temperature circulation is subcritical cycle, and employing R290 is a refrigeration working medium; At high temperature circulation side, CO 2The outlet of compressor and CO 2Oil eliminator connects, CO 2The CO of oil eliminator 2Gas vent and CO 2The pipe side entrance of gas cooler connects, CO 2The pipe side outlet and the CO of gas cooler 2The pipe side entrance of inner heat exchanger connects, CO 2The pipe side outlet of inner heat exchanger is through CO 2Device for drying and filtering and CO 2Expansion valve is connected with the pipe side entrance of condenser/evaporator, the pipe side outlet and the CO of condenser/evaporator 2The shell-side inlet of inner heat exchanger joins CO 2The shell-side outlet and the CO of inner heat exchanger 2The inlet of compressor joins; The water inlet pipe of cooling water is by water pump and stop valve and CO 2The inlet of gas cooler shell-side joins, CO 2The outlet of gas cooler shell-side is connected with the inlet of boiler; Outlet at low temperature circulation side R290 compressor is connected with the inlet of R290 oil eliminator, the R290 gas vent of R290 oil eliminator and the shell-side of condenser/evaporator inlet join, the outlet of condenser/evaporator shell-side is connected with the pipe side entrance of R290 inner heat exchanger, the pipe side outlet of R290 inner heat exchanger is connected with the inlet of evaporimeter with the R290 expansion valve through the R290 device for drying and filtering, the outlet of evaporimeter is connected with the shell-side inlet of R290 inner heat exchanger, the shell-side outlet of R290 inner heat exchanger is joined with the inlet of R290 compressor, and evaporimeter is placed in the household freezer.
2, natural refrigerant refrigerating heat pump device according to claim 1 is characterized in that CO 2The lubricating oil outlet of oil eliminator and CO 2The lubricating oil inlet of compressor connects.
3, natural refrigerant refrigerating heat pump device according to claim 1 and 2 is characterized in that, the lubricating oil outlet of R290 oil eliminator is connected with the lubricating oil inlet of R290 compressor.
CNU2007200992816U 2007-12-25 2007-12-25 Nature working medium refrigeration heat pump Expired - Fee Related CN201141711Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200992816U CN201141711Y (en) 2007-12-25 2007-12-25 Nature working medium refrigeration heat pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200992816U CN201141711Y (en) 2007-12-25 2007-12-25 Nature working medium refrigeration heat pump

Publications (1)

Publication Number Publication Date
CN201141711Y true CN201141711Y (en) 2008-10-29

Family

ID=40069422

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200992816U Expired - Fee Related CN201141711Y (en) 2007-12-25 2007-12-25 Nature working medium refrigeration heat pump

Country Status (1)

Country Link
CN (1) CN201141711Y (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893276A (en) * 2010-04-20 2010-11-24 上海理工大学 System for supplying heat to floor radiation heating system by transcritical carbon dioxide heat pump system
CN102563969A (en) * 2012-02-10 2012-07-11 山东美琳达再生能源开发有限公司 Double-system heat pump device capable of realizing circular heating and heating method
CN104534714A (en) * 2014-11-24 2015-04-22 合肥圣三松冷热技术有限公司 CO2 heat pump system and control method thereof
CN105180433A (en) * 2015-10-21 2015-12-23 浙江佳力科技股份有限公司 Trans-critical CO2 heat pump system meeting requirements of high return water temperature and different heating conditions and manipulation method of trans-critical CO2 heat pump system
CN106247656A (en) * 2016-08-24 2016-12-21 中南焦作氨阀股份有限公司 A kind of cascade refrigeration system
CN106288475A (en) * 2016-08-24 2017-01-04 中南焦作氨阀股份有限公司 A kind of cascade refrigeration system
CN106322806A (en) * 2016-08-24 2017-01-11 中南焦作氨阀股份有限公司 Overlapping refrigerating system
CN106595108A (en) * 2017-01-23 2017-04-26 天津商业大学 Linde cycle key node temperature adjustable ultralow temperature refrigerating device
CN108266915A (en) * 2018-03-05 2018-07-10 天津商业大学 It is a kind of to use single working medium CO2Make the cascade refrigeration system of refrigerant
CN108426428A (en) * 2018-05-02 2018-08-21 天津城建大学 Based on CO2The high/low temperature locellus drying system of Trans-critical cycle heat pump cycle

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893276A (en) * 2010-04-20 2010-11-24 上海理工大学 System for supplying heat to floor radiation heating system by transcritical carbon dioxide heat pump system
CN102563969A (en) * 2012-02-10 2012-07-11 山东美琳达再生能源开发有限公司 Double-system heat pump device capable of realizing circular heating and heating method
CN104534714A (en) * 2014-11-24 2015-04-22 合肥圣三松冷热技术有限公司 CO2 heat pump system and control method thereof
CN105180433A (en) * 2015-10-21 2015-12-23 浙江佳力科技股份有限公司 Trans-critical CO2 heat pump system meeting requirements of high return water temperature and different heating conditions and manipulation method of trans-critical CO2 heat pump system
CN105180433B (en) * 2015-10-21 2017-11-17 杭州佳力斯韦姆新能源科技有限公司 Realize high return water temperature and the Trans-critical cycle CO of two kinds of heating condition requirements2Heat pump and its control method
CN106247656A (en) * 2016-08-24 2016-12-21 中南焦作氨阀股份有限公司 A kind of cascade refrigeration system
CN106288475A (en) * 2016-08-24 2017-01-04 中南焦作氨阀股份有限公司 A kind of cascade refrigeration system
CN106322806A (en) * 2016-08-24 2017-01-11 中南焦作氨阀股份有限公司 Overlapping refrigerating system
CN106595108A (en) * 2017-01-23 2017-04-26 天津商业大学 Linde cycle key node temperature adjustable ultralow temperature refrigerating device
CN106595108B (en) * 2017-01-23 2022-08-02 天津商业大学 Ultra-low temperature refrigerating device with adjustable temperature of key node of Linde cycle
CN108266915A (en) * 2018-03-05 2018-07-10 天津商业大学 It is a kind of to use single working medium CO2Make the cascade refrigeration system of refrigerant
CN108426428A (en) * 2018-05-02 2018-08-21 天津城建大学 Based on CO2The high/low temperature locellus drying system of Trans-critical cycle heat pump cycle

Similar Documents

Publication Publication Date Title
CN201141711Y (en) Nature working medium refrigeration heat pump
CN102997499B (en) A kind of heat pump apparatus of air source simultaneously can producing cold water and hot water
CN106895603B (en) Compression/absorption enclosed parallel connection composite fuel gas heat pump system operation method
CN203364496U (en) Auto-cascade type refrigeration and heating all-in-one machine of refrigerator, air conditioner and water heater
CN205279502U (en) High temperature water source heat pump unit
CN202254464U (en) Trans-critical carbon dioxide (CO2) circulating refrigeration system
CN205048939U (en) Dehumidifying heat pump drying unit
CN109724293A (en) The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system
CN105004095B (en) A kind of trans critical cycle and the combined heat-pump system of two-stage absorption heat pump coproduction
CN202757346U (en) Central air-conditioning and hot water all-in-one machine
CN201302241Y (en) Environment-friendly and energy-saving household central air-conditioning system
CN109163470B (en) Ultralow-temperature carbon dioxide cold and hot water unit
CN204202062U (en) With the water-cooled cooling water air conditioner unit of ice-reserving function
CN2765110Y (en) Natural actuating medium eclipsed type refrigerating plant
CN201229082Y (en) Supermarket refrigeration system with natural working substance
CN104296286B (en) Heat source tower refrigerating and heating energy-saving equipment with ice storage and heat storage functions
CN101694333B (en) Vacuum jet refrigeration device
CN203595316U (en) Screw rod type total heat recovery air-cooled heat pump air conditioning unit
CN203572022U (en) Air-energy heat pump
CN109282397A (en) Novel energy storage air conditioner and method based on air cycle refrigeration circulation
CN209672642U (en) The CO2 Trans-critical cycle double-stage compressive refrigerating system of the absorption supercooling of Driven by Solar Energy
CN201463409U (en) Transcritical turbulent circulation system for carbon dioxide heat pump unit
CN209672648U (en) A kind of opened water steam heat pump and the cold-heat combined system of cascade refrigeration unit
CN204404590U (en) A kind of water source heat pump units
CN209672629U (en) A kind of supercritical carbon dioxide refrigeration system of two-stage throttling

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081029

Termination date: 20111225