CN106500380A - 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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- CN106500380A CN106500380A CN201611198065.7A CN201611198065A CN106500380A CN 106500380 A CN106500380 A CN 106500380A CN 201611198065 A CN201611198065 A CN 201611198065A CN 106500380 A CN106500380 A CN 106500380A
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- refrigeration
- heat exchanger
- valve
- heat pump
- extremely cold
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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
- 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
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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)
- Heat-Pump Type And Storage Water Heaters (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 that overlapping heat pump lacks to the energy two grades and utilizes.The CO suitable for extremely cold area2Overlapping heat pump includes：Kind of refrigeration cycle and refrigeration heat water circulation simultaneously, and the refrigeration heats water circulation simultaneously to be included：Unidirectional valve group, the unidirectional valve group is connected with First Heat Exchanger, and the First Heat Exchanger is connected with the first compressor by reversal valve, and first compressor is connected with water heater by the reversal valve, the water heater is connected with the second heat exchanger, and second heat exchanger is connected with unidirectional valve group.The CO suitable for extremely cold area2Overlapping heat pump can freeze and water heating simultaneously, improve the utilization rate 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 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, the use range of cascade system is limited, therefore lacks to the energy two grades of utilizations.
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
Overlapping heat pump present in art lacks to the energy two grades of technical problems for utilizing.
The CO suitable for extremely cold area that the present invention is provided2Overlapping heat pump, including：Kind of refrigeration cycle and refrigeration are made simultaneously
Hot water circuit, the refrigeration heats water circulation simultaneously to be included：Unidirectional valve group, the unidirectional valve group are connected with First Heat Exchanger, institute
State First Heat Exchanger to connect with the first compressor by reversal valve, first compressor is connected with water heater by the reversal valve
Logical, the water heater is connected with the second heat exchanger, and second heat exchanger is connected with unidirectional valve group.
Further, the kind of refrigeration cycle includes the first refrigeration subcycle and the second refrigeration subcycle, first refrigeration
Subcycle includes evaporative condenser, between the evaporative condenser and the unidirectional valve group and the evaporative condenser and institute
State；The second refrigeration subcycle includes the second compressor and the 3rd heat exchange
Device, second compressor are connected with the evaporative condenser, the 3rd heat exchanger respectively with second heat exchanger, described
Second compressor is connected with the evaporative condenser.
Further, between second heat exchanger and the unidirectional valve group and second heat exchanger is changed with described
To being respectively arranged with the second control valve between valve.
Further, the first control valve and the second control valve are electromagnetic valve.
Further, the unidirectional valve group includes two groups of check valves, and every group of check valve includes some check valves, in per group
Each check valve is sequentially connected in series, and is to be connected in parallel between two groups of check valves.
Further, the first fluid reservoir is provided between the reversal valve and first compressor.
Further, the unidirectional valve group is connected with the second fluid reservoir, second fluid reservoir and the unidirectional valve group it
Between be provided with the first expansion valve.
Further, the second 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 realizes refrigerating function by kind of refrigeration cycle,
Water circulation is heated simultaneously by refrigeration to realize during refrigeration while the function of hot water preparing.Specifically, using applicable
CO in extremely cold area2Overlapping heat pump refrigeration simultaneously water heating function when, refrigeration working medium is via entering the after unidirectional valve group
One heat exchanger, refrigeration working medium enter the first compressor by reversal valve after absorbing heat in First Heat Exchanger, and refrigeration working medium is via the
Water heater is entered after one compressor compresses, heat release is carried out in water heater, so as to provide thermal source with hot water preparing for water heater.System
Cold working medium enters the second heat exchanger and then secondary heat exchange in water heater after heat release, so that the temperature of refrigeration working medium further drops
Low, refrigeration working medium enters check valve group after heat release in the second heat exchanger, so as to complete one cycle process.It is circulated throughout at this
Cheng Zhong, as refrigeration working medium absorbs heat in First Heat Exchanger, therefore can be freezed using First Heat Exchanger, for example, hot water is passed through
One heat exchanger, hot water by refrigeration working medium draw heat, are flowed out so as to temperature reduction becomes cold water in First Heat Exchanger；Due to system
Cold working medium carries out heat release when via water heater, the coolant-temperature gage in water heater therefore can be caused to raise, so as to hot water preparing.
With the CO suitable for extremely cold area that can only freeze in prior art or heat2Overlapping heat pump is compared, this
The CO suitable for extremely cold area that invention is provided2Overlapping heat pump can realize refrigerating function using kind of refrigeration cycle, can be with
Water circulation simultaneously being heated using refrigeration and refrigeration being realized while water heating function, therefore functional diversities, range of application is more extensive.
Meanwhile, carrying out freezing while during water heating, the heat that refrigeration working medium is absorbed in process of refrigerastion discharge in water heater in order to
Hot water preparing, it is achieved that the secondary utilization of the energy, improves energy utilization rate.
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, lacks to the energy two grades of technical problems for utilizing to solve overlapping heat pump 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 area2The refrigeration of overlapping heat pump is simultaneously
Heating water circulation carries out freezing while water heating；
The refrigeration is controlled while the step of heating water circulation is：
Refrigeration working medium is via entrance First Heat Exchanger after unidirectional valve group；Reversal valve and institute are sequentially passed through after refrigeration working medium heat absorption
After stating the first compressor, enter water heater and once exchanged heat；Secondary changing is carried out by the second heat exchanger after refrigeration working medium heat release
Heat；The unidirectional valve group is returned to after refrigeration working medium heat release.
Further, as the CO suitable for extremely cold area2The refrigeration system of overlapping heat pump includes the first refrigeration
When subsystem and the second refrigeration subsystem, control the step of the heating water circulation simultaneously of freezing also includes：Close first
Control valve, opens second and controls valve；
The step of controlling the kind of refrigeration cycle be：
The second control valve is closed, the first control valve is opened；
In first refrigeration subsystem：Refrigeration working medium flow through successively First Heat Exchanger, reversal valve, the first compressor,
Evaporative condenser and unidirectional valve group, and the First Heat Exchanger is returned to from the unidirectional valve group；
In second refrigeration subsystem：Refrigeration working medium flows through the second heat exchanger, the 3rd heat exchanger, the second compression successively
Machine and the evaporative condenser, and the 3rd heat exchanger is again introduced into from the evaporative condenser, finally from the described 3rd
Heat exchanger returns to second heat exchanger.
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 made simultaneously in refrigeration
Schematic diagram is flowed to during hot water operating mode；
Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2When overlapping heat pump is in cooling condition
Flow to schematic diagram.
In figure：11- expansion valves；12- outdoor heat exchangers；13- internal exchangers；14- compressors；15- heats cold with evaporation
Condenser；16- main heat exchangers；2- check valves；31- First Heat Exchangers；The second heat exchangers of 32-；The 3rd heat exchangers of 33-；41- first is pressed
Contracting machine；The second compressors of 42-；51- reversal valves；52- evaporative condensers；53- water heaters；61- first controls valve；62- second is controlled
Valve processed；The first fluid reservoirs of 71-；The second fluid reservoirs of 72-；The first expansion valves of 81-；The second expansion valves of 82-.
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 refrigeration while when heating water condition
Flow to schematic diagram；Fig. 4 is the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump is in refrigeration work
Schematic diagram is flowed to during condition；As in Figure 2-4, the CO suitable for extremely cold area provided in an embodiment of the present invention2Overlapping heat pump system
System, including：Kind of refrigeration cycle and refrigeration heat water circulation simultaneously, and refrigeration heats water circulation simultaneously to be included：Unidirectional valve group, unidirectional valve group
Connect with First Heat Exchanger 31, First Heat Exchanger 31 is connected with the first compressor 41 by reversal valve 51, the first compressor 41 leads to
Cross reversal valve 51 to connect with water heater 53, water heater 53 is connected with the second heat exchanger 32, the second heat exchanger 32 is connected with unidirectional valve group
Logical.
The CO suitable for extremely cold area described in the embodiment of the present invention2Overlapping heat pump realizes refrigeration by kind of refrigeration cycle
Function, heats water circulation simultaneously by refrigeration and realizes during refrigeration while the function of hot water preparing.Specifically, using
It is applied to the CO of extremely cold area2Overlapping heat pump refrigeration simultaneously water heating function when, refrigeration working medium is laggard via unidirectional valve group
Enter First Heat Exchanger 31, refrigeration working medium enters the first compressor 41, system by reversal valve 51 after absorbing heat in First Heat Exchanger 31
Cold working medium carries out heat release, so as to for water heater 53 in water heater 53 via water heater 53 is entered after the compression of the first compressor 41
Thermal source is provided with hot water preparing.Refrigeration working medium enters the second heat exchanger 32 and then secondary heat exchange after heat release in water heater 53, with
So that the temperature of refrigeration working medium further reduces, refrigeration working medium enters check valve group after heat release in the second heat exchanger 32, so as to
Complete one cycle process.In this cyclic process, as refrigeration working medium absorbs heat in First Heat Exchanger 31, therefore can use
First Heat Exchanger 31 freezes, for example, hot water is passed through First Heat Exchanger 31, and hot water is inhaled by refrigeration working medium in First Heat Exchanger 31
Heat is taken, so as to temperature reduces becoming cold water outflow；As refrigeration working medium carries out heat release when via water heater 53, therefore
The coolant-temperature gage in water heater 53 can be caused to raise, so as to hot water preparing.
Compared with the overlapping heat pump that can only freeze with prior art or heat, provided in an embodiment of the present invention applicable
CO in extremely cold area2Overlapping heat pump can realize refrigerating function using kind of refrigeration cycle, and refrigeration can also be utilized to make simultaneously
Hot water circuit realizes refrigeration water heating function simultaneously, therefore functional diversities, and range of application is more extensive.Meanwhile, made
Cold while during water heating, the heat that refrigeration working medium is absorbed in process of refrigerastion is discharged in order to hot water preparing in water heater 53, real
Show the secondary utilization of the energy, improve energy utilization rate.
The above-mentioned CO suitable for extremely cold area2In overlapping heat pump, kind of refrigeration cycle can adopt system of the prior art
SAPMAC method, or, as shown in Fig. 2 kind of refrigeration cycle is heated water circulation simultaneously with refrigeration be bound up, in order to regulate and control.Tool
Body ground, kind of refrigeration cycle include that the first refrigeration subcycle and the second refrigeration subcycle, the first refrigeration subcycle include evaporative condenser
52, the first control is respectively arranged between evaporative condenser 52 and unidirectional valve group and between evaporative condenser 52 and reversal valve 51
Valve processed 61；Second refrigeration subcycle includes the second compressor 42 and the 3rd heat exchanger 33, the second compressor 42 and evaporative condenser
52 connections, the 3rd heat exchanger 33 are connected with the second heat exchanger 32, the second compressor 42 and evaporative condenser 52 respectively.
Further, divide between the second heat exchanger 32 and unidirectional valve group and between the second heat exchanger 32 and reversal valve 51
Second control valve 62 is not provided with.In order to realize automatically controlling, the first control valve 61 and the second control valve 62 are electromagnetic valve, change
It is four-way change-over valve to valve 51, can specifically uses cross valve of the prior art.
Further, unidirectional valve group includes two groups of check valves 2, and every group of check valve 2 includes some check valves 2, in per group
Each check valve 2 is sequentially connected in series, and is to be connected in parallel between two groups of check valves 2.
Further, the first fluid reservoir 71 is provided between reversal valve 51 and the first compressor 41.Unidirectional valve group and second
Fluid reservoir 72 is connected, and is provided with the first expansion valve 81 between the second fluid reservoir 72 and unidirectional valve group.Second heat exchanger 32 and the 3rd
The second expansion valve 82 is provided between heat exchanger 33.First fluid reservoir 71 and the second fluid reservoir 72 can play storage cold-producing medium
Effect, additionally it is possible to play a part of slow pressure and point liquid.
As shown in Fig. 2 in a kind of specific embodiment, it is adaptable to the CO of extremely cold area2Overlapping heat pump includes making
SAPMAC method and refrigeration heat circulation simultaneously, and refrigeration heats circulation simultaneously to be included：Unidirectional valve group, the first expansion valve 81, the second liquid storage
Tank 72, First Heat Exchanger 31, reversal valve 51, the first compressor 41, the first fluid reservoir 71, second control valve 62, water heater 53, the
Two heat exchangers 32 and the 3rd heat exchanger 33.Specifically, reversal valve 51 is four-way change-over valve, and unidirectional valve group includes four check valves 2,
Two check valves 2 are one group, two 2 series system of check valve connections in per group, and two groups of 2 parallel way of check valve connections are unidirectional
Valve group forms a loop with the first expansion valve 81 and the second fluid reservoir 72, and unidirectional valve group is also changed with First Heat Exchanger 31 and second
Hot device 32 is respectively communicated with, and is provided with one second control valve 62 with the second heat exchanger 32 on the pipeline that unidirectional valve group is connected；First
Heat exchanger 31 is connected with four-way change-over valve, and four-way change-over valve and the first compressor 41 and the first fluid reservoir 71 form a loop,
Four-way change-over valve is also connected with water heater 53, is provided with another the second control with water heater 53 on the pipeline that four-way change-over valve is connected
Valve processed 62；Water heater 53 is connected with the second heat exchanger 32, and there are First Heat Exchanger 31 four interfaces, two of which interface to be respectively
Hot water inlet and cooling water outlet, two other interface are used for connecting with unidirectional valve group and four-way change-over valve respectively.
Kind of refrigeration cycle includes the first refrigeration subcycle and the second refrigeration subcycle, and wherein, the first refrigeration subcycle is common
Heat pump refrigeration cycle, the second refrigeration subcycle is carbon dioxide heat-pump kind of refrigeration cycle.
First refrigeration subcycle includes evaporative condenser 52, is provided with one the between evaporative condenser 52 and unidirectional valve group
One control valve 61, is provided with another the first control valve 61 between evaporative condenser 52 and four-way change-over valve.
Second refrigeration subcycle includes the second compressor 42, the 3rd heat exchanger 33 and the second expansion valve 82, specifically, evaporation
Condenser 52 and the 3rd heat exchanger 33 are respectively provided with four interfaces, and the second heat exchanger 32 has six interfaces, evaporative condenser 52
First interface and second interface connect with two first control valves 61 respectively, the 3rd interface of evaporative condenser 52 is changed with the 3rd
The second interface connection of hot device 33, the 4th interface of evaporative condenser 52 are connected with the second compressor 42；3rd heat exchanger 33
First interface is connected with the first interface of the second heat exchanger 32 by the second expansion valve 82, the 3rd interface of the 3rd heat exchanger 33 with
The second interface connection of the second heat exchanger 32, the 4th interface of the 3rd heat exchanger 33 are connected with the second compressor 42；Second heat exchange
3rd interface of device 32 connect with unidirectional valve group by the second control valve 62, the 4th interface of the second heat exchanger 32 and water heater 53
Connection, the 5th interface and the 6th interface of the second heat exchanger 32 are respectively air outlet slit and air intlet.
The above-mentioned CO suitable for extremely cold area2Overlapping heat pump has refrigeration mode and refrigeration while heating aqueous mode,
As the CO for being applied to extremely cold area2When overlapping heat pump is in refrigeration mode, the first control valve 61 is opened, the second control valve 62
Close.In the first refrigeration subcycle, refrigeration working medium can be freon or other refrigeration working mediums, in the second refrigeration subcycle
In, refrigeration working medium is carbon dioxide, and the second heat exchanger 32 is outdoor heat exchanger, and the 3rd heat exchanger 33 is internal exchanger, different
Refrigeration working medium circulate in the refrigeration subcycle being each located, so as to realize process of refrigerastion.When suitable for extremely cold area
CO2Overlapping heat pump is in when freezing heating mode simultaneously, and the first control valve 61 cuts out, and the second control valve 62 is opened.System
Cold working medium heats circulation internal circulation flow simultaneously in refrigeration, absorbs heat to realize refrigerating function at First Heat Exchanger 31,
Heat is discharged at water heater 53 to realize water heating function, so as to realize refrigeration while the function of water heating.
The embodiment of the present invention proposes a kind of CO suitable for extremely cold area simultaneously2The control method of overlapping heat pump, uses
In the above-mentioned CO suitable for extremely cold area of control2Overlapping heat pump, specifically, by controlling the CO for being applied to extremely cold area2Multiple
The kind of refrigeration cycle of overlapping heat pump system is freezed, the CO for being applied to extremely cold area by control2The refrigeration of overlapping heat pump is same
When heat water circulation and carry out freezing while water heating；
Refrigeration is controlled while the step of heating water circulation is：
Refrigeration working medium is via entrance First Heat Exchanger 31 after unidirectional valve group；Reversal valve 51 is sequentially passed through after refrigeration working medium heat absorption
After the first compressor 41, enter water heater 53 and once exchanged heat；Carried out by the second heat exchanger 32 after refrigeration working medium heat release
Secondary heat exchange；Unidirectional valve group is returned to after refrigeration working medium heat release.
As the CO for being applied to extremely cold area2The refrigeration system of overlapping heat pump includes the first refrigeration subsystem and the second system
During refrigeration subsystem, control refrigeration is while the step of heating water circulation also includes：Close first and control valve 61, open second and control valve
62.The step of controlling kind of refrigeration cycle be：Close second and control valve 62, open first and control valve 61；In the first refrigeration subsystem：
Refrigeration working medium flows through First Heat Exchanger 31, reversal valve 51, the first compressor 41, evaporative condenser 52 and unidirectional valve group successively, and
First Heat Exchanger 31 is returned to from unidirectional valve group；In the second refrigeration subsystem：Refrigeration working medium flow through successively the second heat exchanger 32,
Three heat exchangers 33, the second compressor 42 and evaporative condenser 52, and the 3rd heat exchanger 33 is again introduced into from evaporative condenser 52,
Finally second heat exchanger 32 is returned to from the 3rd heat exchanger 33.
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 refrigeration are made simultaneously
Hot water circuit, the refrigeration heats water circulation simultaneously to be included：Unidirectional valve group, the unidirectional valve group are connected with First Heat Exchanger, institute
State First Heat Exchanger to connect with the first compressor by reversal valve, first compressor is connected with water heater by the reversal valve
Logical, the water heater is connected with the second heat exchanger, and second heat exchanger is connected with unidirectional valve group.
2. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the refrigeration is followed
Ring includes that the first refrigeration subcycle and the second refrigeration subcycle, the first refrigeration subcycle include evaporative condenser, the steaming
Feel cold between condenser and the unidirectional valve group and the first control is respectively arranged between the evaporative condenser and the reversal valve
Valve processed；The second refrigeration subcycle includes the second compressor and the 3rd heat exchanger, and second compressor is cold with the evaporation
Condenser is connected, and the 3rd heat exchanger is connected with second heat exchanger, second compressor and the evaporative condenser respectively
Logical.
3. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that described second changes
The second control is respectively arranged between hot device and the unidirectional valve group and between second heat exchanger and the reversal valve
Valve.
4. the CO suitable for extremely cold area according to claim 32Overlapping heat pump, it is characterised in that first control
Valve processed and the second control valve are electromagnetic valve.
5. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the check valve
Group includes that two groups of check valves, every group of check valve include some check valves, and in per group, each check valve is sequentially connected in series, two groups of lists
To between valve for being connected in parallel.
6. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the reversal valve
The first fluid reservoir is provided between first compressor.
7. the CO suitable for extremely cold area according to claim 12Overlapping heat pump, it is characterised in that the check valve
Group is connected with the second fluid reservoir, is provided with the first expansion valve between second fluid reservoir and the unidirectional valve group.
8. the CO suitable for extremely cold area according to claim 22Overlapping heat pump, it is characterised in that described second changes
The second expansion valve is provided between hot device and the 3rd heat exchanger.
9. a kind of CO suitable for extremely cold area2The control method of overlapping heat pump, arbitrary for control such as claim 1-8
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 refrigeration of system heats water circulation simultaneously and carries out freezing while water heating；
The refrigeration is controlled while the step of heating water circulation is：
Refrigeration working medium is via entrance First Heat Exchanger after unidirectional valve group；Reversal valve and described the is sequentially passed through after refrigeration working medium heat absorption
After one compressor, enter water heater and once exchanged heat；Secondary heat exchange is carried out by the second heat exchanger after refrigeration working medium heat release；System
The unidirectional valve group is returned to after cold working medium heat release.
10. the CO suitable for extremely cold area according to claim 92The control method of overlapping heat pump, its feature exist
In as the CO suitable for extremely cold area2The refrigeration system of overlapping heat pump includes the first refrigeration subsystem and the second system
During refrigeration subsystem, control the step of the heating water circulation simultaneously of freezing also includes：Close first and control valve, open second
Control valve；
The step of controlling the kind of refrigeration cycle be：
The second control valve is closed, the first control valve is opened；
In first refrigeration subsystem：Refrigeration working medium flows through First Heat Exchanger, reversal valve, the first compressor, evaporation successively
Condenser and unidirectional valve group, and the First Heat Exchanger is returned to from the unidirectional valve group；
In second refrigeration subsystem：Refrigeration working medium flow through successively the second heat exchanger, the 3rd heat exchanger, the second compressor and
The evaporative condenser, and the 3rd heat exchanger is again introduced into from the evaporative condenser, finally from the described 3rd heat exchange
Device returns to second heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198065.7A CN106500380A (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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Cited By (1)
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| CN115978879A (en) * | 2023-03-21 | 2023-04-18 | 昆明理工大学 | High-efficient roast room-freezer coupled system |
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Application publication date: 20170315 |