CN106500381A - It is applied to the CO of extremely cold area2Overlapping heat pump and its control method - Google Patents
It is applied to the CO of extremely cold area2Overlapping heat pump and its control method Download PDFInfo
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- CN106500381A CN106500381A CN201611198106.2A CN201611198106A CN106500381A CN 106500381 A CN106500381 A CN 106500381A CN 201611198106 A CN201611198106 A CN 201611198106A CN 106500381 A CN106500381 A CN 106500381A
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- Prior art keywords
- heat exchanger
- heat
- overlapping
- extremely cold
- cold area
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Classifications
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
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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
- F25B41/40—Fluid line arrangements
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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)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides a kind of CO suitable for extremely cold area2Overlapping heat pump and its control method, are related to technical field of heat pumps, are to solve the problems, such as overlapping heat pump single function.The CO suitable for extremely cold area2Overlapping heat pump includes：Kind of refrigeration cycle and circulation is heated, kind of refrigeration cycle includes：First Heat Exchanger, the first compressor and the second heat exchanger, the second heat exchanger are connected with the first capillary tube, and the first capillary tube is connected with First Heat Exchanger；Heating circulation includes evaporative condenser, First Heat Exchanger is connected with the first compressor, the second heat exchanger and evaporative condenser respectively by reversal valve, the second capillary tube is provided between evaporative condenser and First Heat Exchanger, the 3rd heat exchanger is provided between evaporative condenser and the second heat exchanger, is provided with the second compressor between the 3rd heat exchanger and evaporative condenser.The CO suitable for extremely cold area2Overlapping heat pump can be changed between cooling condition and heating condition, had wide range of applications.
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 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 being obtained in gas and water or soil, being done work through electric power, then the high-grade heat that can be utilized is provided to people again
Energy.
Specifically, as shown in figure 1, a kind of existing overlapping heat pump, the overlapping heat pump is mainly used in food
The fields such as freezing and refrigeration, the preservation of crop seeds and Refrigeration System in Supermarkets, which has two sets of blood circulation, wherein a set of follows
Comprising an outdoor heat exchanger 12 and an expansion valve 11 and of compressor 14, of internal exchanger 13, in loop systems
Individual heat with evaporative condenser 15；Other set blood circulation includes a main heat exchange of expansion valve 11, of compressor 14,
Device 16 and an evaporative condenser 15, two sets of system shares, one evaporative condenser 15, i.e., two sets systems are cold by an evaporation
Condenser 15 is bound up.Refrigeration working medium is circulated in two sets of systems respectively, and is in cooling condition in evaporative condenser
The lower effect that realizes heat exchange, freeze.
However, present inventor has found, as the energy that consumed in existing overlapping heat pump can only be for making
Cold or heat, single function, limit the use range of cascade system.
Content of the invention
It is an object of the invention to provide a kind of CO suitable for extremely cold area2Overlapping heat pump, to solve existing skill
The technical problem of overlapping heat pump single function present in art.
The CO suitable for extremely cold area that the present invention is provided2Overlapping heat pump, including：Kind of refrigeration cycle and circulation is heated,
The kind of refrigeration cycle includes：First Heat Exchanger, the First Heat Exchanger have water inlet and a water out, and described first
Heat exchanger is connected with the first compressor by reversal valve, and the First Heat Exchanger is connected by the reversal valve and the second heat exchanger
Logical, second heat exchanger is connected with the first capillary tube, and first capillary tube is connected with the First Heat Exchanger；
Described heat circulation and include：Evaporative condenser, is provided between the evaporative condenser and the First Heat Exchanger
Second capillary tube, the evaporative condenser are connected with First Heat Exchanger by reversal valve, and the evaporative condenser and second exchanges heat
The 3rd heat exchanger is provided between device, is provided with the second compressor between the 3rd heat exchanger and the evaporative condenser.
Further, between the evaporative condenser and the reversal valve and second capillary tube and described first
The first control valve is provided between heat exchanger, between first capillary tube and the First Heat Exchanger and described second
The second control valve is provided between heat exchanger and the reversal valve.
Further, described first valve is controlled for electromagnetic valve.
Further, described second valve is controlled for electromagnetic valve.
Further, the reversal valve is four-way change-over valve.
Further, the first fluid reservoir is provided between first compressor and the reversal valve.
Further, the second fluid reservoir is provided between first capillary tube and the First Heat Exchanger.
Further, the 3rd fluid reservoir is provided between second capillary tube and the First Heat Exchanger.
Further, the first expansion valve is provided between second heat exchanger and the 3rd heat exchanger.
Relative to prior art, the CO suitable for extremely cold area of the present invention2Overlapping heat pump has following excellent
Gesture：
CO suitable for extremely cold area of the present invention2Overlapping heat pump has two kinds of winter heating and cooling in summer
Operating mode, realizes winter heating by heating circulation, realizes cooling in summer by kind of refrigeration cycle.As the CO for being applied to extremely cold area2
When overlapping heat pump is in cooling in summer operating mode, refrigeration working medium enters First Heat Exchanger via the first capillary tube, changes first
Heat absorption in hot device, enters the first compressor through reversal valve after heat absorption, enters the second heat exchanger after the first compressor compresses, and
The first capillary tube is returned to from the second heat exchanger, so as to complete a cyclic process.As refrigeration working medium is in First Heat Exchanger interior suction
Heat, therefore will draw the heat of the water for flowing through First Heat Exchanger so that flow through the temperature drop of the water of First Heat Exchanger, so as to reach
Arrive refrigeration.
As the CO for being applied to extremely cold area2When overlapping heat pump is in winter heating's operating mode, refrigeration working medium is divided into low temperature
Section refrigeration working medium and high temperature section refrigeration working medium, low-temperature zone refrigeration working medium enter the second heat exchanger, enter the 3rd heat exchanger after heat absorption,
The second compressor is entered after heat exchange, enters evaporative condenser, return to the 3rd heat exchange after heat release after the second compressor compresses
Device, so that complete a cyclic process of low-temperature zone refrigeration working medium；High temperature section refrigeration working medium enters evaporation via the second capillary tube
Condenser, through by the first compressor is entered after reversal valve, entering First Heat Exchanger, heat release after the first compressor compresses after heat absorption
After return to the second capillary tube, so as to complete a cyclic process of high temperature section refrigeration working medium.As high temperature section refrigeration working medium is
Heat release is carried out in one heat exchanger, and liberated heat is flowed through the water of First Heat Exchanger and absorbed, so that the temperature of water is raised, with
Reach heating effect.
In sum, the CO suitable for extremely cold area that the present invention is provided2Overlapping heat pump has refrigeration and heats two
Function is planted, can be switched between two kinds of operating modes of cooling in summer and winter heating, functional diversities, range of application are more extensive.
Another object of the present invention is to proposing a kind of CO suitable for extremely cold area2The controlling party of overlapping heat pump
Method, to solve the technical problem of overlapping heat pump single function present in prior art.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of CO suitable for extremely cold area2The control method of overlapping heat pump, for control such as above-mentioned technical scheme
The described CO suitable for extremely cold area2Overlapping heat pump, by the control CO for being applied to extremely cold area2Overlapping heat pump
The kind of refrigeration cycle of system is freezed, by the control CO for being applied to extremely cold area2Overlapping heat pump heats circulation
Heated；
In the kind of refrigeration cycle：Refrigeration working medium enters First Heat Exchanger via the first capillary tube, through commutation after heat absorption
Valve and the first compressor, enter the second heat exchanger after first compressor compresses, and return to institute from second heat exchanger
State the first capillary tube；
Heat in circulation described：Low-temperature zone refrigeration working medium enters the second heat exchanger, enters the 3rd heat exchanger, change after heat absorption
The second compressor is entered after heat, evaporative condenser is entered after second compressor compresses, through being changed by the described 3rd after heat release
Hot device returns to second heat exchanger；High temperature section refrigeration working medium enters the evaporative condenser via the second capillary tube, after heat absorption
Via the first compressor being entered after the reversal valve, enter the First Heat Exchanger, heat release after first compressor compresses
After return to second capillary tube.
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 is had 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
Needed for embodiment or description of the prior art, accompanying drawing to be used 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 described in background technology2The structural representation of overlapping heat pump；
Fig. 2 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The structural representation of overlapping heat pump；
Fig. 3 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump is in winter heating's work
Schematic diagram is flowed to during condition；
Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump is in cooling in summer work
Schematic diagram is flowed to during condition.
In figure：11- expansion valves；12- outdoor heat exchangers；13- internal exchangers；14- compressors；15- heats cold with evaporation
Condenser；16- main heat exchangers；21- First Heat Exchangers；The second heat exchangers of 22-；The 3rd heat exchangers of 23-；The first capillary tubies of 31-；32-
Second capillary tube；The first compressors of 41-；The second compressors of 42-；51- reversal valves；52- evaporative condensers；61- first controls valve；
62- second controls valve；The first fluid reservoirs of 71-；The second fluid reservoirs of 72-；The 3rd fluid reservoirs of 73-；The first expansion valves of 8-.
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 whole embodiments.Embodiment in based on the present invention, ordinary skill
The every other embodiment obtained under the premise of creative work is not made by personnel, 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 of instruction such as " level ", " interior ", " outward " or position relationship 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 hint 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 hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " 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 electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Fig. 2 is the CO suitable for extremely cold area provided in an embodiment of the present invention2The structural representation of overlapping heat pump；Figure
3 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump is in flow direction during winter heating's operating mode
Schematic diagram；Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump is in cooling in summer operating mode
When flow to schematic diagram；As in Figure 2-4, the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump,
Including：Kind of refrigeration cycle and circulation is heated, wherein：
Kind of refrigeration cycle includes：First Heat Exchanger 21, First Heat Exchanger 21 have water inlet and water out；First Heat Exchanger 21
Connected with the first compressor 41 by reversal valve 51；First Heat Exchanger 21 is connected with the second heat exchanger 22 by reversal valve 51；The
Two heat exchangers 22 are connected with the first capillary tube 31, and the first capillary tube 31 is connected with First Heat Exchanger 21.
Heating circulation includes：Evaporative condenser 52, is provided with second mao between evaporative condenser 52 and First Heat Exchanger 21
Tubule 32, evaporative condenser 52 are connected with First Heat Exchanger 21 by reversal valve 51, evaporative condenser 52 and the second heat exchanger 22
Between be provided with the 3rd heat exchanger 23, be provided with the second compressor 42 between the 3rd heat exchanger 23 and evaporative condenser 52.
CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump has winter heating and summer system
Cold two kinds of operating modes, realize winter heating by heating circulation, realize cooling in summer by kind of refrigeration cycle.When suitable for extremely cold area
CO2When overlapping heat pump is in cooling in summer operating mode, refrigeration working medium enters First Heat Exchanger 21 via the first capillary tube 31,
Absorb heat in First Heat Exchanger 21, after heat absorption, the first compressor 41 is entered through reversal valve 51, after compressing through the first compressor 41
The second heat exchanger 22 is entered, and the first capillary tube 31 is returned to from the second heat exchanger 22, so as to complete a cyclic process.Due to system
Cold working medium is absorbed heat in First Heat Exchanger 21, therefore will draw the heat of the water for flowing through First Heat Exchanger 21 so that flow through first
The temperature drop of the water of heat exchanger 21, so that reach refrigeration.
As the CO for being applied to extremely cold area2When overlapping heat pump is in winter heating's operating mode, refrigeration working medium is divided into low temperature
Section refrigeration working medium and high temperature section refrigeration working medium, low-temperature zone refrigeration working medium enter the second heat exchanger 22, enter the 3rd and exchange heat after heat absorption
Device 23, enters the second compressor 42 after heat exchange, enter evaporative condenser 52, return to institute after heat release after compressing through the second compressor 42
The 3rd heat exchanger 23 is stated, so as to complete a cyclic process of low-temperature zone refrigeration working medium；High temperature section refrigeration working medium is via second mao
Tubule 32 enters evaporative condenser 52, through by the first compressor 41 is entered after reversal valve 51, pressing through the first compressor 41 after heat absorption
First Heat Exchanger 21 is entered after contracting, the second capillary tube 32 after heat release, is returned to, so as to complete a circulation of high temperature section refrigeration working medium
Process.As high temperature section refrigeration working medium carries out heat release in First Heat Exchanger 21, liberated heat is flowed through First Heat Exchanger 21
Water absorb so that water temperature raise, to reach heating effect.
In sum, the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump have refrigeration and
Two kinds of functions are heated, can be switched between two kinds of operating modes of cooling in summer and winter heating, functional diversities, range of application is more
Extensively.
For ease of switching between cooling in summer operating mode and winter heating's operating mode, further, evaporative condenser 52
It is provided with the first control valve 61 between reversal valve 51 and between the second capillary tube 32 and First Heat Exchanger 21, first mao
The second control valve 62 is provided between tubule 31 and First Heat Exchanger 21 and between the second heat exchanger 22 and reversal valve 51.
For ease of realizing automatically controlling, the first control valve 61 is electromagnetic valve, and second controls valve 62 for electromagnetic valve, reversal valve 51
For four-way change-over valve, cross valve of the prior art can be used.
Further, be provided with the first fluid reservoir 71 between the first compressor 41 and reversal valve 51, the first capillary tube 31 with
The second fluid reservoir 72 is provided between First Heat Exchanger 21, is provided with the 3rd storage between the second capillary tube 32 and First Heat Exchanger 21
Flow container 73, is provided with the first expansion valve 8 between the second heat exchanger 22 and the 3rd heat exchanger 23.First fluid reservoir 71, the second liquid storage
Tank 72 and the 3rd fluid reservoir 73 can play a part of to store refrigeration working medium, additionally it is possible to play a part of slow pressure and point liquid.
In a kind of specific embodiment, it is adaptable to the CO of extremely cold area2Overlapping heat pump includes kind of refrigeration cycle and system
Thermal cycle, wherein：
Kind of refrigeration cycle includes that the first capillary tube 31, the second fluid reservoir 72, second control valve 62, First Heat Exchanger 21, commutation
Valve 51, the first fluid reservoir 71, the first compressor 41 and the first expansion valve 8.Specifically, First Heat Exchanger 21 has four interfaces,
Respectively first interface, second interface, water inlet and water out, in kind of refrigeration cycle, what water inlet was entered is hot water, water out
Flowed out is cold water, and the first interface of First Heat Exchanger 21 is connected with reversal valve 51, the second interface of First Heat Exchanger 21 and the
Two fluid reservoirs 72 are connected；It is linked to be a loop between reversal valve 51 and the first compressor 41 and the first fluid reservoir 71, two second
In control valve 62, one of them second control valve 62 is arranged at the pipeline that connect between the second fluid reservoir 72 and First Heat Exchanger 21
On, another the second control valve 62 is arranged on the pipeline that the second heat exchanger 22 is connected with reversal valve 51.
Heating circulation includes that evaporative condenser 52, the second capillary tube 32, the 3rd fluid reservoir 73, first control valve 61 and the 3rd
Heat exchanger 23, specifically, the second capillary tube 32 is connected with the 3rd fluid reservoir 73, and the of the 3rd fluid reservoir 73 and First Heat Exchanger 21
Two orifices, evaporative condenser 52 and the 3rd heat exchanger 23 are respectively provided with four interfaces, and the second heat exchanger 22 has six and connects
Mouthful, the first interface of evaporative condenser 52 is connected with the second capillary tube 32 and reversal valve 51 respectively with second interface, evaporative condenser
3rd interface of device 52 is connected with the second interface of the 3rd heat exchanger 23, the 4th interface of evaporative condenser 52 and the second compressor
42 connections；The first interface of the 3rd heat exchanger 23 is connected with the first interface of the second heat exchanger 22 by the first expansion valve 8, and the 3rd
3rd interface of heat exchanger 23 is connected with the second interface of the second heat exchanger 22, and the 4th interface of the 3rd heat exchanger 23 and second is pressed
Contracting machine 42 is connected；3rd interface of the second heat exchanger 22 is connected with the first capillary tube 31, the 4th interface of the second heat exchanger 22 with
Reversal valve 51 is connected, and the 5th interface and the 6th interface of the second heat exchanger 22 are respectively air outlet slit and air intlet, two the
In one control valve 61, one of them first control valve 61 is arranged at the pipeline that the 3rd fluid reservoir 73 is connected with First Heat Exchanger 21
On, another the first control valve 61 is arranged on the pipeline that evaporative condenser 52 is connected with reversal valve 51.
Additionally, reversal valve 51 is four-way change-over valve, the first control valve 61 and the second control valve 62 are electromagnetic valve, and second changes
Hot device 22 is outdoor heat exchanger, and the 3rd heat exchanger 23 is internal exchanger.
During operation kind of refrigeration cycle, close first and control valve 61, open second and control valve 62, reversal valve 51 is adjusted
Whole for refrigeration mode, refrigeration working medium enters First Heat Exchanger 21 via the first capillary tube 31 and the second fluid reservoir 72, passes through after heat absorption
Reversal valve 51, the first fluid reservoir 71 and the first compressor 41 is crossed, after compressing through the first compressor 41, the second heat exchanger 22 is entered, and
The first capillary tube 31 is returned to from the second heat exchanger 22, so as to complete a cyclic process.Meanwhile, hot water is via First Heat Exchanger 21
Water inlet enter, in First Heat Exchanger 21, refrigeration working medium draw hot water heat so that hot water temperature reduce,
Flow out from water out after becoming cold water, so as to complete process of refrigerastion.
During operation heats circulation, refrigeration working medium is divided into two parts, respectively high temperature section refrigeration working medium and low temperature
Section refrigeration working medium, high temperature section refrigeration working medium can be freon or other refrigeration working mediums, and low-temperature zone refrigeration working medium is carbon dioxide.
When winter heating's operating mode being switched to from cooling in summer operating mode, need to close the second control valve 62, open first and control valve 61, because
Different with the flow direction of refrigeration working medium in kind of refrigeration cycle for heating circulation, therefore also need for reversal valve 51 to be adjusted to heating mode.Low
Temperature section refrigeration working medium enters the second heat exchanger 22 through the first expansion valve 8, enters the 3rd heat exchanger 23, heat exchange after the outer heat of absorption chamber
After enter the second compressor 42, through the second compressor 42 compress after enter evaporative condenser 52, through the 3rd heat exchanger 23 after heat release
The first expansion valve 8 is returned to the second heat exchanger 22, so as to complete a cyclic process of low-temperature zone refrigeration working medium；High temperature section is freezed
Working medium enters evaporative condenser 52 via the second capillary tube 32, is passed through by entrance the after reversal valve 51, the first fluid reservoir 71 after heat absorption
One compressor 41, enters First Heat Exchanger 21 after compressing through the first compressor 41, passes through and return to the by the 3rd fluid reservoir 73 after heat release
Two capillary tubies 32, so that complete a circulation of high temperature section refrigeration working medium.Meanwhile, water inlet of the cold water via First Heat Exchanger 21
Enter, after absorbing high temperature section refrigeration working medium liberated heat in First Heat Exchanger 21, temperature is raised, and is gone out from water after being changed into hot water
Mouth flows out, so as to complete heating operations.
The another object of the embodiment of the present invention is to propose a kind of CO suitable for extremely cold area2The control of overlapping heat pump
Method processed, for controlling the CO suitable for extremely cold area of above-described embodiment offer2Overlapping heat pump, specifically, by control
System is applied to the CO of extremely cold area2The kind of refrigeration cycle of overlapping heat pump is freezed, and is applied to extremely cold area by control
CO2The circulation that heats of overlapping heat pump is heated.
In kind of refrigeration cycle：Refrigeration working medium enters First Heat Exchanger 21 via the first capillary tube 31, through commutation after heat absorption
Valve 51 and the first compressor 41, enter the second heat exchanger 22 after compressing through the first compressor 41, and return to from the second heat exchanger 22
First capillary tube 31.
Heating in circulation：Low-temperature zone refrigeration working medium enters the second heat exchanger 22, enters the 3rd heat exchanger 23, change after heat absorption
The second compressor 42 is entered after heat, enters evaporative condenser 52, return to the 3rd heat exchange after heat release after compressing through the second compressor 42
Device 23；High temperature section refrigeration working medium enters evaporative condenser 52 via the second capillary tube 32, through being entered by after reversal valve 51 after heat absorption
First compressor 41, enters First Heat Exchanger 21 after compressing through the first compressor 41, returns to the second capillary tube 32 after heat release.
It is applied to the CO of extremely cold area2The control method of overlapping heat pump and the above-mentioned CO suitable for extremely cold area2Overlapping
Heat pump is had the advantage that identical relative to prior art, will not be described here.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of CO suitable for extremely cold area2Overlapping heat pump, it is characterised in that include：Kind of refrigeration cycle and circulation is heated,
The kind of refrigeration cycle includes：First Heat Exchanger, the First Heat Exchanger have water inlet and water out, first heat exchange
Device is connected with the first compressor by reversal valve, and the First Heat Exchanger is connected with the second heat exchanger by the reversal valve, institute
State the second heat exchanger to connect with the first capillary tube, first capillary tube is connected with the First Heat Exchanger；
Described heat circulation and include：Evaporative condenser, is provided with second between the evaporative condenser and the First Heat Exchanger
Capillary tube, the evaporative condenser are connected with First Heat Exchanger by reversal valve, the evaporative condenser and the second heat exchanger it
Between be provided with the 3rd heat exchanger, be provided with the second compressor between the 3rd heat exchanger and the evaporative condenser.
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 is provided between condenser and the reversal valve and between second capillary tube and the First Heat Exchanger
Valve, is all provided between first capillary tube and the First Heat Exchanger and between second heat exchanger and the reversal valve
It is equipped with the second control valve.
3. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that first control
Valve processed is electromagnetic valve.
4. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that second control
Valve processed is electromagnetic 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 12Overlapping heat pump, it is characterised in that first pressure
The first fluid reservoir is provided between contracting machine and the reversal valve.
7. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that described first mao
The second fluid reservoir is provided between tubule and the First Heat Exchanger.
8. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that described second mao
The 3rd fluid reservoir is provided between tubule and the First Heat Exchanger.
9. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that described second changes
The first expansion valve is provided between hot device and the 3rd heat exchanger.
10. a kind of CO suitable for extremely cold area2The control method of overlapping heat pump, arbitrary for control such as claim 1-9
The CO suitable for extremely cold area described in2Overlapping heat pump, it is characterised in that be applied to extremely cold area by control is described
CO2The kind of refrigeration cycle of overlapping heat pump is freezed, by the control CO for being applied to extremely cold area2Overlapping heat pump system
The circulation that heats of system is heated；
In the kind of refrigeration cycle：Refrigeration working medium enters First Heat Exchanger via the first capillary tube, after heat absorption through reversal valve and
First compressor, enters the second heat exchanger after first compressor compresses, and returns to described from second heat exchanger
One capillary tube；
Heat in circulation described：Low-temperature zone refrigeration working medium enters second heat exchanger, enters the 3rd heat exchanger, change after heat absorption
The second compressor is entered after heat, evaporative condenser is entered after second compressor compresses, through being changed by the described 3rd after heat release
Hot device returns to second heat exchanger；High temperature section refrigeration working medium enters the evaporative condenser via the second capillary tube, after heat absorption
Via first compressor is entered after the reversal valve, enter the First Heat Exchanger after first compressor compresses,
Second capillary tube is returned to after heat release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198106.2A CN106500381A (en) | 2016-12-22 | 2016-12-22 | It is applied to the CO of extremely cold area2Overlapping heat pump and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198106.2A CN106500381A (en) | 2016-12-22 | 2016-12-22 | It is applied to the CO of extremely cold area2Overlapping heat pump and its control method |
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