CN106642781A - CO2 cascade heat pump system suitable for extremely cold areas and control method thereof - Google Patents
CO2 cascade heat pump system suitable for extremely cold areas and control method thereof Download PDFInfo
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- CN106642781A CN106642781A CN201611204745.5A CN201611204745A CN106642781A CN 106642781 A CN106642781 A CN 106642781A CN 201611204745 A CN201611204745 A CN 201611204745A CN 106642781 A CN106642781 A CN 106642781A
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a CO2 cascade heat pump system suitable for extremely cold areas and a control method thereof, and relates to the technical field of heat pumps. The technical problem that the energy source consumed in the existing CO2 cascade heat pump system cannot be used for heating and secondary utilization of the energy is absent is solved. The CO2 cascade heat pump system suitable for extremely cold areas comprises a carbon dioxide heat pump refrigeration cycle and an ordinary heat pump refrigeration cycle, wherein the ordinary heat pump refrigeration cycle comprises a first capillary, an ice machine and an evaporative condenser, which are arranged in sequence, the evaporative condenser is communicated with a first compressor through a reserving valve, and the first compressor sequentially is communicated with a heat exchanger and the first capillary through a reserving valve. Because the ice machine is arranged between the first capillary and the evaporative condenser in a high temperature segment circulation process, the CO2 cascade heat pump system suitable for extremely cold areas can realize an ice making function while heating, thereby effectively realizing the secondary utilization of the energy.
Description
Technical field
The present invention relates to technical field of heat pumps, more particularly to a kind of CO suitable for extremely cold area2Overlapping heat pump and
Its control method.
Background technology
Heat pump be it is a kind of can be by the device of the heat energy transfer of low level heat energy to high-order thermal source, typically first from the sky of nature
Low grade heat energy is obtained in gas and water or soil, through electric power acting, the high-grade heat that then can be utilized to people's offer again
Energy.
Specifically, CO2Overlapping heat pump can be mainly used in heating, and it has two sets of circulatory systems, and a set of is logical
Cross gas of the carbon dioxide as low-temperature zone to circulate, another set of is by the liquid circulation as high temperature section such as freon and two
The set circulatory system can be linked togather by evaporative condenser, and exchanged heat with realization in the case where evaporative condenser is in heating condition,
The effect for heating.
However, present inventor has found, due to existing CO2The energy consumed in overlapping heat pump can only be used for
Heat, therefore lack to the energy two grades of utilizations.
The content of the invention
It is an object of the invention to provide a kind of overlay heat pump and its control method, to solve existing CO2Overlapping
The energy consumed in heat pump can only lack to the energy two grades of technical problems for utilizing for heating.
The present invention provides a kind of CO suitable for extremely cold area2Overlapping heat pump, including：Carbon dioxide heat-pump refrigeration is followed
Ring and common heat pump refrigeration cycle；The common heat pump refrigeration cycle includes the first capillary, ice machine, the evaporation for setting gradually
Condenser, the evaporative condenser is communicated with the first compressor by reversal valve, and first compressor passes through the reversal valve
It has been sequentially communicated heat exchanger and first capillary.
During practical application, the first control valve, the heat exchanger are provided between the evaporative condenser and the reversal valve
The second control valve is provided between first capillary.
Wherein, be provided with the first fluid reservoir between the reversal valve and first compressor, the second control valve with
The second fluid reservoir is provided between first capillary.
Specifically, the carbon dioxide heat-pump kind of refrigeration cycle includes that the expansion valve for setting gradually, outdoor heat exchanger, inside are changed
Hot device, the second compressor and the evaporative condenser, and the evaporative condenser is by the internal exchanger and the expansion
Valve is connected.
Further, the reversal valve is four-way change-over valve.
Further, the first control valve and the second control valve are magnetic valve.
During practical application, the CO suitable for extremely cold area2Overlapping heat pump also includes：3rd kind of refrigeration cycle；Institute
The second capillary, the 3rd control valve, the heat exchanger that the 3rd kind of refrigeration cycle includes setting gradually are stated, the heat exchanger passes through institute
State reversal valve and be communicated with first compressor, and first compressor has been sequentially communicated the 4th control by the reversal valve
Valve, the outdoor heat exchanger and second capillary.
Wherein, it is provided with the 3rd fluid reservoir between second capillary and the 3rd control valve.
Specifically, the 3rd control valve and the 4th control valve are magnetic valve.
Relative to prior art, the CO suitable for extremely cold area of the present invention2Overlapping heat pump has following excellent
Gesture：
The CO suitable for extremely cold area that the present invention is provided2In overlapping heat pump, including：Carbon dioxide heat-pump refrigeration is followed
Ring and common heat pump refrigeration cycle；Wherein, common heat pump refrigeration cycle includes the first capillary, ice machine, the steaming for setting gradually
Feel cold condenser, and the evaporative condenser is communicated with the first compressor by reversal valve, and the first compressor is connected successively by reversal valve
It is connected with heat exchanger and the first capillary.Thus knowable to analysis, the CO suitable for extremely cold area that the present invention is provided2Overlapping heat pump system
In system, due to being provided with ice machine between the first capillary and evaporative condenser in high temperature section cyclic process, therefore, it is possible to
Make the CO for being applied to extremely cold area2The function of ice making while overlapping heat pump is realized heating, so as to effectively realize the energy
Two grades utilization.
The present invention also provides a kind of CO suitable for extremely cold area2The control method of overlapping heat pump, it is described to be applied to
The CO of extremely cold area2Overlapping heat pump includes：Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump refrigeration cycle and the 3rd refrigeration
Circulation；The common heat pump refrigeration cycle includes the first capillary, ice machine, the evaporative condenser for setting gradually, the evaporation
Condenser Jing first controls valve and is communicated with the first compressor by reversal valve, first compressor by the reversal valve according to
It is secondary to be communicated with heat exchanger, the second control valve and first capillary；The carbon dioxide heat-pump kind of refrigeration cycle includes setting successively
Expansion valve, outdoor heat exchanger, internal exchanger, the second compressor and the evaporative condenser put, and the evaporative condenser
Connected with the expansion valve by the internal exchanger；3rd kind of refrigeration cycle include set gradually the second capillary,
3rd control valve, the heat exchanger, the heat exchanger is communicated with first compressor, and described first by the reversal valve
Compressor has been sequentially communicated the 4th control valve, the outdoor heat exchanger and second capillary by the reversal valve；It is described
Suitable for the CO of extremely cold area2The control method of overlapping heat pump includes：Winter heating is while ice making operating mode and cooling in summer
Operating mode；Simultaneously ice making operating mode comprises the steps for the winter heating：The 3rd control valve and the 4th control valve are closed,
The first control valve and the second control valve are opened, and the reversal valve is adjusted to into heating mode；Low-temperature zone cold-producing medium two
Carbonoxide enters the outdoor heat exchanger through the expansion valve, and absorbs outdoor heat；It is laggard through the internal exchanger
Enter second compressor；The evaporative condenser is entered after the second compressor compresses described in, the expansion is back to after heat release
Valve simultaneously completes low-temperature zone circulation；The first capillary is into the ice machine described in cold-producing medium working medium Jing of high temperature section and carries out once
Heat exchange；Absorb and enter after heat evaporative condenser absorption low-temperature zone heat and carry out secondary heat exchange；Sequentially pass through described changing
To after valve and first compressor compresses, into the heat exchanger；First capillary is back to after heat release and high temperature is completed
Duan Xunhuan；The cooling in summer operating mode comprises the steps：The first control valve and the second control valve are closed, institute is opened
The 3rd control valve and the 4th control valve are stated, and the reversal valve is adjusted to into refrigeration mode；Second mao described in refrigeration working medium Jing
The heat exchanger is entered by the described 3rd control valve after tubule；The reversal valve and first compression are sequentially passed through after heat absorption
After machine compression, into the outdoor heat exchanger heat exchange heat release is carried out；Second capillary is back to after heat release and completes kind of refrigeration cycle.
The CO suitable for extremely cold area2The control method of overlapping heat pump and the above-mentioned CO suitable for extremely cold area2
Overlapping heat pump has the advantage that identical relative to prior art, will not be described here.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The structural representation of overlapping heat pump；
Fig. 2 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Winter heating is simultaneously in overlapping heat pump
Ice making flows to schematic diagram；
Fig. 3 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The stream of cooling in summer in overlapping heat pump
To schematic diagram；
Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The stream of the control method of overlapping heat pump
Journey schematic diagram.
In figure：1- expansion valves；2- outdoor heat exchangers；3- internal exchangers；The compressors of 4- second；5- the 4th is controlled
Valve；The capillaries of 6- second；The fluid reservoirs of 7- the 3rd；8- the 3rd controls valve；9- second controls valve；The fluid reservoirs of 10- second；
The capillaries of 11- first；12- evaporative condensers；13- first controls valve；The fluid reservoirs of 14- first；The compressors of 15- first；
16- reversal valves；17- heat exchangers；18- ice machines.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or be electrically connected；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be with
It is the connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Fig. 1 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The structural representation of overlapping heat pump.
As shown in figure 1, the embodiment of the present invention provides a kind of CO suitable for extremely cold area2Overlapping heat pump, including：Two
Carbonoxide heat pump refrigeration cycle and common heat pump refrigeration cycle；Common heat pump refrigeration cycle includes the first capillary for setting gradually
11st, ice machine 18, evaporative condenser 12, evaporative condenser 12 is communicated with the first compressor 15, the first compression by reversal valve 16
Machine 15 has been sequentially communicated the capillary 11 of heat exchanger 17 and first by reversal valve 16.
Relative to prior art, the CO suitable for extremely cold area described in the embodiment of the present invention2Overlapping heat pump has
Following advantage：
CO suitable for extremely cold area provided in an embodiment of the present invention2In overlapping heat pump, as shown in figure 1, including：Two
Carbonoxide heat pump refrigeration cycle and common heat pump refrigeration cycle；Wherein, common heat pump refrigeration cycle includes first for setting gradually
Capillary 11, ice machine 18, evaporative condenser 12, the evaporative condenser 12 is communicated with the first compressor 15 by reversal valve 16,
And first compressor 15 capillary 11 of heat exchanger 17 and first has been sequentially communicated by reversal valve 16.Thus knowable to analysis, this
The CO suitable for extremely cold area that bright embodiment is provided2In overlapping heat pump, due to first in high temperature section cyclic process
Ice machine 18 is provided between capillary 11 and evaporative condenser 12, therefore, it is possible to make to be applied to the CO of extremely cold area2Overlapping heat
The function of ice making while pumping system is realized heating, so as to effectively realize two grades of utilizations of the energy.
During practical application, for the ease of making to be applied to the CO of extremely cold area2Overlapping heat pump heats in the winter time system simultaneously
Switch between ice and cooling in summer the two operating modes, as shown in figure 1, can between above-mentioned evaporative condenser 12 and reversal valve 16
To be provided with the first control valve 13, the second control valve 9 can be provided between the capillary 11 of heat exchanger 17 and first.Therefore, when
The first control control valve 9 of valve 13 and second opens (other control valves close) and when reversal valve 16 is in heating mode, it is adaptable to
The CO of extremely cold area2Overlapping heat pump is at winter heating's ice making operating mode simultaneously, when the first control valve 13 and second is controlled
When valve processed 9 is closed (accordingly control valve to open) and reversal valve 16 is in refrigeration mode, it is adaptable to the CO of extremely cold area2Overlapping heat
Pumping system is at cooling in summer operating mode.
Wherein, as shown in figure 1, the first fluid reservoir 14 can be provided between the compressor 15 of above-mentioned reversal valve 16 and first,
The second fluid reservoir 10 can be provided between the second control capillary 11 of valve 9 and first.First, second fluid reservoir (14,10) energy
Enough play a part of to store cold-producing medium, additionally it is possible to play a part of slow pressure and point liquid.
Specifically, the CO suitable for extremely cold area provided in an embodiment of the present invention2In overlapping heat pump, carbon dioxide heat
Pump kind of refrigeration cycle can include expansion valve 1, outdoor heat exchanger 2, internal exchanger 3, the second compressor 4 and above-mentioned for setting gradually
Evaporative condenser 12, and the evaporative condenser 12 connected by internal exchanger 3 with expansion valve 1, so as to carbon dioxide heat-pump system
SAPMAC method and common heat pump refrigeration cycle can make the CO for being applied to extremely cold area2Overlapping heat pump is effectively realized winter system
The effect of heat ice making simultaneously.
During practical application, the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump also includes：The
Three kind of refrigeration cycle；3rd kind of refrigeration cycle includes the control valve 8 of the second capillary the 6, the 3rd, the above-mentioned heat exchanger 17 for setting gradually,
The heat exchanger 17 is communicated with the first compressor 15 by reversal valve 16, and first compressor 15 is sequentially communicated by reversal valve 16
There are the 4th control valve 5, the capillary 6 of outdoor heat exchanger 2 and second.
Herein it should be added that, the capillary 6 of above-mentioned first capillary 11 and second can function similarly to expansion
The effect of valve.
Fig. 2 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Winter heating is simultaneously in overlapping heat pump
Ice making flows to schematic diagram；Fig. 3 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Summer in overlapping heat pump
What is freezed flows to schematic diagram.
Wherein, it is provided in an embodiment of the present invention suitable for extremely cold area in order to easily realize the conversion of two operating modes
CO2In overlapping heat pump, above-mentioned reversal valve 16 can be preferably four-way change-over valve.Specifically, when four-way change-over valve is in system
During heat pattern, as shown in Fig. 2 the flow direction in common heat pump refrigeration cycle for successively by the control valve 13 of evaporative condenser 12, first,
Reversal valve 16, the first fluid reservoir 14, the first compressor 15 and Jing reversal valves 16 are to heat exchanger 17；When four-way change-over valve is in system
During chill formula, as shown in figure 3, the flow direction in common heat pump refrigeration cycle is successively by heat exchanger 17, reversal valve 16, the first liquid storage
Tank 14, the first compressor 15 and Jing reversal valves 16 to the 4th control valve 5 and outdoor heat exchanger 2.
Further, as shown in Figure 1-Figure 3, the can be provided between above-mentioned second capillary 6 and the 3rd control valve 8
Three fluid reservoirs 7, the 3rd fluid reservoir 7 can play a part of to store cold-producing medium, additionally it is possible to play a part of slow pressure and point liquid.
Further, in order to realize automatically controlling, the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping
In heat pump, above-mentioned first control valve 13, second control valve the 9, the 3rd control control valve 5 of valve 8 and the 4th can be electromagnetism
Valve.
Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The stream of the control method of overlapping heat pump
Journey schematic diagram.
The embodiment of the present invention also provides a kind of CO suitable for extremely cold area2The control method of overlapping heat pump, such as schemes
Shown in 1- Fig. 3, it is adaptable to the CO of extremely cold area2Overlapping heat pump includes：Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump
Kind of refrigeration cycle and the 3rd kind of refrigeration cycle；The common heat pump refrigeration cycle include set gradually the first capillary 11, ice machine 18,
Evaporative condenser 12, the Jing first of evaporative condenser 12 controls valve 13 and is communicated with the first compressor 15 by reversal valve 16, and first
Compressor 15 has been sequentially communicated heat exchanger 17, second and has controlled the capillary 11 of valve 9 and first by reversal valve 16；The carbon dioxide heat
Pump kind of refrigeration cycle includes expansion valve 1, outdoor heat exchanger 2, internal exchanger 3, the second compressor 4 and the evaporative condenser for setting gradually
Device 12, and evaporative condenser 12 connected by internal exchanger 3 with expansion valve 1；3rd kind of refrigeration cycle includes what is set gradually
The control valve 8 of second capillary the 6, the 3rd, heat exchanger 17, heat exchanger 17 is communicated with the first compressor 15 by reversal valve 16, and the
One compressor 15 has been sequentially communicated the 4th control valve 5, the capillary 6 of outdoor heat exchanger 2 and second by reversal valve 16.Such as Fig. 4 institutes
Show, it is adaptable to the CO of extremely cold area2The control method of overlapping heat pump includes：Winter heating is while ice making operating mode and summer system
Cold operating mode；With reference to shown in Fig. 2, simultaneously ice making operating mode comprises the steps for the winter heating：Step S11, closing the 3rd control valve 8
With the 4th control valve 5, open first and control the control valve 9 of valve 13 and second, and reversal valve 16 is adjusted to into heating mode；Step S12,
Low-temperature zone refrigerant carbon dioxide enters outdoor heat exchanger 2 through expansion valve 1, and absorbs outdoor heat；Step S13, through interior
The second compressor 4 is entered after portion's heat exchanger 3；Step S14, Jing the second compressor 4 compress after enter evaporative condenser 12, after heat release
It is back to expansion valve 1 and completes low-temperature zone circulation；Step S21, first capillary of cold-producing medium working medium Jing 11 of high temperature section enter ice making
Machine 18 is simultaneously once exchanged heat；Evaporative condenser 12 is entered after step S22, absorption heat to absorb low-temperature zone heat and carry out secondary
Heat exchange；Step S23, sequentially pass through 16 and first compressor of reversal valve 15 compress after, into heat exchanger 17；After step S24, heat release
It is back to the first capillary 11 and completes high temperature section circulation；With reference to shown in Fig. 3, the cooling in summer operating mode comprises the steps：Step
S31, closing first control the control valve 9 of valve 13 and second, open the 3rd control valve 8 and the 4th and control valve 5, and reversal valve 16 is adjusted
To refrigeration mode；Step S32, refrigeration working medium enter heat exchanger 17 Jing after the second capillary 6 by the 3rd control valve 8；Step
After the compression of 16 and first compressor of reversal valve 15 is sequentially passed through after S33, heat absorption, into outdoor heat exchanger 2 heat exchange heat release is carried out；Step
The second capillary 6 is back to after rapid S34, heat release complete kind of refrigeration cycle.
Herein it should be added that, winter heating simultaneously ice making operating mode when, low-temperature zone cold-producing medium first circulate after high temperature
Section cold-producing medium recycling, and low-temperature zone cold-producing medium can be continued cycling through as needed during high temperature section refrigerant circulation.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of CO suitable for extremely cold area2Overlapping heat pump, it is characterised in that include：Carbon dioxide heat-pump kind of refrigeration cycle
With common heat pump refrigeration cycle；
The common heat pump refrigeration cycle includes the first capillary, ice machine, the evaporative condenser for setting gradually, and the evaporation is cold
Condenser is communicated with the first compressor by reversal valve, first compressor by the reversal valve be sequentially communicated heat exchanger and
First capillary.
2. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the evaporation is cold
The first control valve is provided between condenser and the reversal valve, between the heat exchanger and first capillary second is provided with
Control valve.
3. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that the reversal valve
The first fluid reservoir is provided between first compressor, is provided between the second control valve and first capillary
Second fluid reservoir.
4. the CO suitable for extremely cold area according to any one of claim 1-32Overlapping heat pump, its feature exists
In the carbon dioxide heat-pump kind of refrigeration cycle includes expansion valve, outdoor heat exchanger, internal exchanger, the second pressure for setting gradually
Contracting machine and the evaporative condenser, and the evaporative condenser connected by the internal exchanger with the expansion valve.
5. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the reversal valve
For four-way change-over valve.
6. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that first control
Valve processed and the second control valve are magnetic valve.
7. the CO suitable for extremely cold area according to claim 42Overlapping heat pump, it is characterised in that also include：The
Three kind of refrigeration cycle；
3rd kind of refrigeration cycle includes the second capillary, the 3rd control valve, the heat exchanger for setting gradually, the heat exchanger
First compressor is communicated with by the reversal valve, and first compressor has been sequentially communicated by the reversal valve
Four control valves, the outdoor heat exchanger and second capillary.
8. the CO suitable for extremely cold area according to claim 72Overlapping heat pump, it is characterised in that described second mao
The 3rd fluid reservoir is provided between tubule and the 3rd control valve.
9. the CO suitable for extremely cold area according to claim 72Overlapping heat pump, it is characterised in that the 3rd control
Valve processed and the 4th control valve are magnetic valve.
10. a kind of CO suitable for extremely cold area2The control method of overlapping heat pump, it is characterised in that described suitable for extremely trembling with fear
The CO in area2Overlapping heat pump includes：Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump refrigeration cycle and the 3rd refrigeration are followed
Ring；
The common heat pump refrigeration cycle includes the first capillary, ice machine, the evaporative condenser for setting gradually, and the evaporation is cold
Condenser Jing first controls valve and is communicated with the first compressor by reversal valve, and first compressor passes through the reversal valve successively
It is communicated with heat exchanger, the second control valve and first capillary；
The carbon dioxide heat-pump kind of refrigeration cycle includes expansion valve, outdoor heat exchanger, internal exchanger, the second pressure for setting gradually
Contracting machine and the evaporative condenser, and the evaporative condenser connected by the internal exchanger with the expansion valve；
3rd kind of refrigeration cycle includes the second capillary, the 3rd control valve, the heat exchanger for setting gradually, the heat exchanger
First compressor is communicated with by the reversal valve, and first compressor has been sequentially communicated by the reversal valve
Four control valves, the outdoor heat exchanger and second capillary；
The CO suitable for extremely cold area2The control method of overlapping heat pump includes：Winter heating is while ice making operating mode and summer
Season cooling condition；
Simultaneously ice making operating mode comprises the steps for the winter heating：The 3rd control valve and the 4th control valve are closed,
The first control valve and the second control valve are opened, and the reversal valve is adjusted to into heating mode；Low-temperature zone cold-producing medium two
Carbonoxide enters the outdoor heat exchanger through the expansion valve, and absorbs outdoor heat；It is laggard through the internal exchanger
Enter second compressor；The evaporative condenser is entered after the second compressor compresses described in, the expansion is back to after heat release
Valve simultaneously completes low-temperature zone circulation；The first capillary is into the ice machine described in cold-producing medium working medium Jing of high temperature section and carries out once
Heat exchange；Absorb and enter after heat evaporative condenser absorption low-temperature zone heat and carry out secondary heat exchange；Sequentially pass through described changing
To after valve and first compressor compresses, into the heat exchanger；First capillary is back to after heat release and high temperature is completed
Duan Xunhuan；
The cooling in summer operating mode comprises the steps：The first control valve and the second control valve are closed, opens described
3rd control valve and the 4th control valve, and the reversal valve is adjusted to into refrigeration mode；Second capillary described in refrigeration working medium Jing
The heat exchanger is entered by the described 3rd control valve after pipe；The reversal valve and first compressor are sequentially passed through after heat absorption
After compression, into the outdoor heat exchanger heat exchange heat release is carried out；Second capillary is back to after heat release and completes kind of refrigeration cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611204745.5A CN106642781A (en) | 2016-12-22 | 2016-12-22 | CO2 cascade heat pump system suitable for extremely cold areas and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611204745.5A CN106642781A (en) | 2016-12-22 | 2016-12-22 | CO2 cascade heat pump system suitable for extremely cold areas and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106642781A true CN106642781A (en) | 2017-05-10 |
Family
ID=58826566
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611204745.5A Pending CN106642781A (en) | 2016-12-22 | 2016-12-22 | CO2 cascade heat pump system suitable for extremely cold areas and control method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN106642781A (en) |
Citations (6)
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