CN106595142A - Expansion device and CO2 heat pump provided with enhanced vapor injection circuit and used in arctic weather - Google Patents

Expansion device and CO2 heat pump provided with enhanced vapor injection circuit and used in arctic weather Download PDF

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Publication number
CN106595142A
CN106595142A CN201710068204.2A CN201710068204A CN106595142A CN 106595142 A CN106595142 A CN 106595142A CN 201710068204 A CN201710068204 A CN 201710068204A CN 106595142 A CN106595142 A CN 106595142A
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loop
increasing
heat pump
heat exchanger
enthalpy
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CN106595142B (en
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刘勇
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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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves

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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)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention provides an expansion device and a CO2 heat pump provided with an enhanced vapor injection circuit and used in the arctic weather and relates to the technical field of heat pumps. The expansion device comprises a first auxiliary capillary pipe, a second auxiliary capillary pipe and a capillary pipe control solenoid valve. The CO2 heat pump provided with the enhanced vapor injection circuit and used in the arctic weather comprises an indoor heat exchanger and a compressor. A main circuit and the enhanced vapor injection circuit are arranged between an outlet of the indoor heat exchanger and the compressor in parallel. The expansion device is connected with the main circuit in series. A main capillary pipe and an outdoor heat exchanger are sequentially arranged between the expansion device and the compressor. According to the CO2 heat pump provided with the enhanced vapor injection circuit and used in the arctic weather, the expansion device is connected with the main circuit in series, and the technical problems that by means of a traditional air source heat pump in the prior art, as the outdoor temperature decreases continuously, the indoor heating load is increased continuously, the generated heating is insufficient, the compressor ratio is increased and the system performance coefficient is decreased sharply are solved.

Description

Expansion gear and the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear2Heat pump
Technical field
The present invention relates to technical field of heat pumps, increases more particularly, to a kind of expansion gear and for weather lower band jet of extremely trembling with fear The CO in enthalpy loop2Heat pump.
Background technology
According to heat energy law, heat, when not controlled by external factor, is that to be transferred to temperature low from where temperature height Place, and heat pump is the machine for heat to be shifted where low from temperature to where temperature height, air-conditioner is exactly a kind of Common heat-pump-type.
The cold-producing medium major part of existing air-conditioning uses freon, by taking freon refrigerant air-conditioning as an example, its operation principle It is：
(1) with the gaseous state freon of compressor compresses low-temp low-pressure so as to become the gaseous state freon of High Temperature High Pressure；Then The gaseous state freon of its heat release, final high temperature high pressure is set to become the liquid fluorine profit of normal temperature high voltage with condenser (i.e. off-premises station) again It is high.That is, what now off-premises station produced by boasting is hot blast.
(2) liquid freon of the high pressure in condenser drastically expands to after capillary tube, becomes the liquid fluorine of low-temp low-pressure Leon.
(3) liquid freon of low-temp low-pressure enters vaporizer (indoor set), evaporates because freon is reached from capillary tube Space increases suddenly after device, and pressure reduces, and the freon of liquid will be vaporized, and become the freon of gaseous state low temperature, so as to absorb Substantial amounts of heat.After the heat of the air in vaporizer is absorbed, the air in vaporizer becomes cold air, so indoor set What is produced by boasting is exactly cold wind.
Circulation said process, by the turnover of condenser and vaporizer heat, so as to realize the conversion of energy.
But above-mentioned circulation is continuously increased with the continuous decline of outdoor temperature, indoor heating load, it may appear that heat supply is not Foot, compressor than increase, the problems such as coefficient of performance drastically declines.Therefore, a kind of heat pump how is provided so as to can be low Temperature is regional and extremely trembles with fear and still has enough heating capacities, and can stable operation, be that those skilled in the art are urgently to be resolved hurrily Problem.
Based on this, the invention provides a kind of CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear2Heat pump to solve on The technical problem stated.
The content of the invention
It is an object of the invention to provide a kind of expansion gear, to alleviate expansion gear present in prior art in low temperature The technical problem of stable operation under the conditions of extremely trembling with fear.
The expansion gear that the present invention is provided, including the first assisted capillary, the second assisted capillary and control capillary tube electricity Magnet valve；
The first end connection of the second end of first assisted capillary and second assisted capillary；Described first is auxiliary The first end of capillary tube and the second end connection of second assisted capillary are helped, at the second end of first assisted capillary Branch road is provided with and the second end of second assisted capillary between, control capillary tube electromagnetic valve is provided with the branch road.
The expansion gear that the present invention is provided, including the first assisted capillary, the second assisted capillary and control capillary tube electricity Magnet valve.When heating, if ambient temperature be less than certain numerical value, by open capillary tube electromagnetic valve, the first assisted capillary and Second assisted capillary accesses closed circuit simultaneously, so as to increased closed circuit in capillary tube quantity.The quantity of capillary tube Increase can result in the pressure differential of the entrance and exit of capillary tube to be increased so that the blood pressure lowering throttling action of capillary tube becomes apparent from.Cause This expansion gear described herein can finally realize the increase of the heating capacity of heat pump in heat pump cycle.
The present invention also aims to provide a kind of CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear2Heat pump, with slow Conventional air source heat pump present in solution prior art is continuously increased institute with the continuous decline of outdoor temperature, indoor heating load The heat supply of generation is not enough, compressor is than technical problem that increase, coefficient of performance drastically decline.
Provided by the present invention for the CO2 heat pumps in weather lower band air injection enthalpy-increasing loop of extremely trembling with fear, including indoor heat exchanger and pressure Contracting machine, the import of the indoor heat exchanger is connected with the outlet of the compressor, the outlet of the indoor heat exchanger and the pressure Parallel connection is provided with major loop and increasing enthalpy loop between contracting machine；Described expansion gear is connected on the major loop；It is described swollen It is connected with main capillary tube and outdoor heat exchanger between swollen device and the compressor in turn.
Further, also including regenerator, the regenerator includes the first import, the second import, first outlet and second Outlet, the major loop is flowed into by first import, flowed out by the first outlet, and the increasing enthalpy loop is entered by described second Mouth is flowed into, and is flowed out by the second outlet；The first end connection of second import and first assisted capillary, described the Second end of two assisted capillaries and the compressor connect.
Further, the increasing enthalpy loop includes increasing enthalpy circuit electromagnetic valve and expansion apparatuss；The increasing enthalpy circuit electromagnetic valve One end and the indoor heat exchanger connect, one end connection of the other end and the expansion apparatuss, the other end connection of the expansion apparatuss It is connected with first import.
Further, it is provided with check valve between the first end and the branch road of first assisted capillary.
Further, it is provided with filter between the main capillary tube and the outdoor heat exchanger.
Further, also including gas-liquid separator, the gas-liquid separator is arranged on the major loop, positioned at the room Between external heat exchanger and the compressor；Cross valve is provided between the gas-liquid separator and the outdoor heat exchanger.
Further, set between the major loop and increasing enthalpy loop starting point in parallel and the indoor heat exchanger It is equipped with electromagnetic valve；Two-way expansion apparatuss are provided between the import of the indoor heat exchanger and the outlet of the compressor.
Further, cold-producing medium is carbon dioxide.
Further, also including controller, the control capillary tube electromagnetic valve, increasing enthalpy circuit electromagnetic valve and the electromagnetic valve Connect with the controller.
Due to existing heat pump, when outdoor temperature is very low, off-premises station heat-exchange capacity declines, the normal gas returning port of compressor Return-air amount reduce, compressor horsepower reduce, it is impossible to play best effects.It is described for weather lower band of extremely trembling with fear that the present invention is provided The CO in air injection enthalpy-increasing loop2Heat pump, when working under extremely cold weather, on the one hand supplements refrigerant gas by increasing enthalpy loop, from And increasing compressor air-discharging amount, the circularly cooling dosage that heat exchanger indoor unit is heated increases, and realizes that heating capacity increases.It is same with this When, on the other hand, above-mentioned expansion gear is accessed in major loop, by the access quantity for adjusting capillary tube, realize heating capacity Increase.
The CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear that the present invention is provided2Heat pump, by controlling capillary tube The electromagnetic valve in electromagnetic valve and increasing enthalpy loop is so as to the operation of control system.Big temperature range is realized by controlling capillary tube electromagnetic valve Interior automatically adjusts.Refrigerant gas is supplemented by increasing enthalpy loop, so as to increase compressor air-discharging amount.The use that the present invention is provided In the CO in weather lower band air injection enthalpy-increasing loop of extremely trembling with fear2Heat pump, by changing the structure of major loop and increased increasing enthalpy loop Method, both collective effects realize the increase of heating capacity such that it is able to the stable operation under extremely cold weather.
Based on this, the present invention than original technology, with the system under weather of extremely trembling with fear can stable operation, do not disliked by low temperature The advantage of the impact of bad environment.
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 schematic diagram of expansion gear provided herein；
Fig. 2 is the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear provided herein2The schematic diagram of heat pump.
Labelling：1- outdoor heat exchangers；2- compressors；3- cross valves；4- gas-liquid separators；5- indoor heat exchangers； 6- increasing enthalpy circuit electromagnetic valves；7- expansion apparatuss；The assisted capillaries of 8- first；The assisted capillaries of 9- second；10- regenerators； 11- controls capillary tube electromagnetic valve；12- check valves；The main capillary tubies of 13-；14- filters.
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 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, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
Embodiment one
As shown in figure 1, providing a kind of expansion gear in the present embodiment, the expansion gear includes the first auxiliary capillary Pipe 8, the second assisted capillary 9 and control capillary tube electromagnetic valve 11；
The first end connection of the second end of first assisted capillary 8 and second assisted capillary 9；Described first The second end connection of the first end of assisted capillary 8 and second assisted capillary 9, in first assisted capillary 8 Branch road is provided between second end of the second end and second assisted capillary 9, control capillary tube is provided with the branch road Electromagnetic valve 11.
The expansion gear that the present invention is provided, including the first assisted capillary 8, the second assisted capillary 9 and control capillary tube Electromagnetic valve 11.When heating, if ambient temperature is less than certain numerical value, by opening capillary tube electromagnetic valve, the first auxiliary capillary The assisted capillary 9 of pipe 8 and second accesses closed circuit simultaneously, so as to increased closed circuit in capillary tube quantity.Due to heat The performance of pump depends primarily on the physical dimension of the state of cold-producing medium and capillary tube at capillary inlet, and the quantity of capillary tube increases Plus can result in capillary tube entrance and exit pressure differential increase so that the blood pressure lowering throttling action of capillary tube becomes apparent from.Therefore Expansion gear described herein can finally realize the increase of the heating capacity of heat pump in heat pump cycle.
Further, it is provided with check valve 12 between the first end and the branch road of first assisted capillary 8.
The expansion gear that the present invention is provided, it is contemplated that refrigeration can be taken into account and heated, and the capillary tube and system needed for freezing The specification of the capillary tube needed for heat is the same, therefore is provided with check valve between the first end and branch road of the first assisted capillary 8 12.In refrigeration, cold-producing medium passes through from the loop comprising check valve 12.
Embodiment two
The carbon dioxide heat-pump for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear that the present embodiment is provided, embodiment one Described technical scheme falls within the embodiment, and the technical scheme that embodiment one has been described above is not repeated description.
Specifically, as shown in Fig. 2 providing in the present embodiment a kind of for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear Carbon dioxide heat-pump, including indoor heat exchanger 5 and compressor 2, the import of the indoor heat exchanger 5 and the compressor 2 Outlet connection, parallel connection is provided with major loop and increasing enthalpy loop between the outlet of the indoor heat exchanger 5 and the compressor 2； Expansion gear described in claim 1 is connected on the major loop；Connect successively between the expansion gear and the compressor 2 It is connected to main capillary tube 13 and outdoor heat exchanger 1.
Due to existing heat pump, when outdoor temperature is very low, off-premises station heat-exchange capacity declines, the normal return-air of compressor 2 The return-air amount of mouth is reduced, and the power of compressor 2 is reduced, it is impossible to play best effects.It is described for weather of extremely trembling with fear that the present invention is provided The carbon dioxide heat-pump in lower band air injection enthalpy-increasing loop, when working under extremely cold weather, is on the one hand supplemented by increasing enthalpy loop and is made Cold air, so as to increase the capacity of compressor 2, the circularly cooling dosage that heat exchanger indoor unit is heated increases, and realizes heating capacity Increase.At the same time, on the other hand, above-mentioned expansion gear is accessed in major loop, by the access quantity for adjusting capillary tube, Realize that heating capacity increases.
The carbon dioxide heat-pump for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear that the present invention is provided, by controlling hair The electromagnetic valve in tubule electromagnetic valve 11 and increasing enthalpy loop is so as to the operation of control system.Realized greatly by controlling capillary tube electromagnetic valve 11 Automatically adjusting in temperature range.Refrigerant gas is supplemented by increasing enthalpy loop, so as to increase the capacity of compressor 2.The present invention is carried For the carbon dioxide heat-pump in weather lower band air injection enthalpy-increasing loop of extremely trembling with fear for described in, by the structure and the increasing that change major loop The method in increasing enthalpy loop is added, both collective effects realize the increase of heating capacity such that it is able to stable under extremely cold weather Operation.
Further, also including regenerator 10, the regenerator 10 include the first import, the second import, first outlet and Second outlet, the major loop is flowed into by first import, is flowed out by the first outlet, and the increasing enthalpy loop is by described Two imports are flowed into, and are flowed out by the second outlet；The first end connection of second import and first assisted capillary 8, Second end of second assisted capillary 9 and the compressor 2 connect.
The effect of regenerator 10 mainly has three, and one is to make the highly pressurised liquid before throttling supercool, in order to avoid vaporize before throttling, The suction temperature of compressor 2 is improved simultaneously, to mitigate harmful overheated and improve the working condition of compressor 2；Two is can to improve its refrigeration The coefficient of refrigerating performance of device；Three is to offset the vaporizing liquid carried secretly in gas, and both recyclable cold in turn, ensured that compressor 2 was normally returned Oil.
Further, the increasing enthalpy loop includes increasing enthalpy circuit electromagnetic valve 6 and expansion apparatuss 7；The increasing enthalpy circuit electromagnetic valve 6 One end and the indoor heat exchanger 5 connect, the connection of one end of the other end and the expansion apparatuss 7, the other end of the expansion apparatuss 7 Connection is connected with first import.When heat pump detects ambient temperature should access increasing enthalpy loop, returned by controlling increasing enthalpy Way solenoid valve 6 can control increasing enthalpy loop and receive no access, so as to realize the automatic operating of heat pump.
Such as Fig. 2, in the alternative of the present embodiment, it is provided between the main capillary tube 13 and the outdoor heat exchanger 1 Filter 14.Filter 14 is used to remove the impurity in refrigerant liquid,
Such as Fig. 2, in the alternative of the present embodiment, also including gas-liquid separator 4, the gas-liquid separator 4 is arranged on institute State on major loop, between the outdoor heat exchanger 1 and the compressor 2；Change in the gas-liquid separator 4 and the outdoor Cross valve 3 is provided between hot device 1.
Such as Fig. 2, in the alternative of the present embodiment, starting point in parallel and institute in the major loop and the increasing enthalpy loop State and be provided with electromagnetic valve between indoor heat exchanger 5；Set between the import of the indoor heat exchanger 5 and the outlet of the compressor 2 It is equipped with two-way expansion apparatuss 7.
Such as Fig. 2, in the alternative of the present embodiment, cold-producing medium is carbon dioxide.When using as cold-producing medium, carbon dioxide It is essentially the same with the operation principle of freon, but will be more environmentally-friendly using carbon dioxide.
Such as Fig. 2, in the alternative of the present embodiment, also including controller, the control capillary tube electromagnetic valve 11, increasing enthalpy is returned Way solenoid valve 6 and the electromagnetic valve are connected with the controller.Controller can automatically control the unlatching of each valve and close Close.
The carbon dioxide heat-pump for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear that the present invention is provided, its course of work It is：
When warming oneself in the winter time, the high pressure refrigerant vapor discharged by compressor 2 flows into indoor heat exchanger 5 Jing after cross valve 3 (being used as condenser) refrigerant vapour releases heat when condensing, and room air is heated, and reaches heating of house purpose.Then from room The cold-producing medium out of interior heat exchanger 5 will be divided into two kinds of situations：
The first situation：When system is heated in ambient temperature higher than -5 degree, control capillary tube electromagnetic valve 11 is opened, and is controlled Electromagnetic valve processed is normally open solenoid valve, and increasing enthalpy circuit electromagnetic valve 6 is closed, and it is normally closed solenoid valve.From the system out of indoor heat exchanger 5 Cryogen is directly entered regenerator 10, then through the loop of the first assisted capillary 8, is then passed through main capillary tube 13 and enters filter 14, the cold-producing medium after filtration enters outdoor heat exchanger 1 (being used as vaporizer), and it is laggard that the steam after evaporation again passes by cross valve 3 Enter gas-liquid separator 4, finally sucked by compressor 2, complete to heat circulation.
Second situation：When system is heated in environment less than -5 degree, control capillary tube electromagnetic valve 11 is closed, and increasing enthalpy is returned Way solenoid valve 6 is opened.Regenerator 10 can be entered through expansion apparatuss 7 from the cold-producing medium out of indoor heat exchanger 5, be gone out from regenerator 10 The cold-producing medium sub-fraction come can directly turn again to compressor 2, refrigerant gas be supplemented, so as to increase the capacity of compressor 2, room The circularly cooling dosage that interior machine heat exchanger is heated increases, and realizes that heating capacity increases；While the major part from regenerator 10 out Cold-producing medium can be through the first assisted capillary 8 and the second assisted capillary 9, i.e., now two capillary tubies access loop；Subsequently Filter 14 is entered through main capillary tube 13, the cold-producing medium after filtration enters outdoor heat exchanger 1 (being used as vaporizer), after evaporation Steam is again passed by and enter after cross valve 3 gas-liquid separator 4, is finally sucked by compressor 2, completes to heat circulation.
It should be noted that as a example by said process is when outdoor critical temperature is spent for -5, i.e., outdoor temperature be less than - When 5 degree, increasing enthalpy loop can open, and the low-pressure low-temperature coolant after electric expansion valve blood pressure lowering carries out appropriate preheating, to reach Pressure in suitable, there is provided carry out second-compressed to compressor 2.Above-mentioned critical temperature can also be other numerical value.
The application at least has advantages below：
1. the expansion gear for providing is made by the application, it is possible to achieve automatically adjusting in big temperature range.
2. can realize under northern cold snap system can stable operation, do not affected by low temperature adverse circumstances.
3. efficient energy-saving, this device can realize the high COP of system (cycle performance coefficient of heat pump) value in big temperature range, The efficient operation of whole system is allowed while also very energy-conservation.
4. this plant running low cost, controls simpler.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution The scope of scheme.

Claims (10)

1. a kind of expansion gear, it is characterised in that including the first assisted capillary, the second assisted capillary and control capillary tube electricity Magnet valve；
The first end connection of the second end of first assisted capillary and second assisted capillary；The first auxiliary hair The second end connection of the first end of tubule and second assisted capillary, in the second end of first assisted capillary and institute Branch road is provided between the second end for stating the second assisted capillary, control capillary tube electromagnetic valve is provided with the branch road.
2. a kind of CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear2Heat pump, it is characterised in that including indoor heat exchanger and pressure Contracting machine, the import of the indoor heat exchanger is connected with the outlet of the compressor, the outlet of the indoor heat exchanger and the pressure Parallel connection is provided with major loop and increasing enthalpy loop between contracting machine；Expansion gear described in claim 1 is connected on the major loop On；It is connected with main capillary tube and outdoor heat exchanger between the expansion gear and the compressor in turn.
3. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that also wrap Regenerator is included, the regenerator includes the first import, the second import, first outlet and second outlet, and the major loop is by described First import is flowed into, and is flowed out by the first outlet, and the increasing enthalpy loop is flowed into by second import, by the second outlet Flow out；The first end connection of second import and first assisted capillary, the second end of second assisted capillary With compressor connection.
4. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 32Heat pump, it is characterised in that described Increasing enthalpy loop includes increasing enthalpy circuit electromagnetic valve and expansion apparatuss；One end of the increasing enthalpy circuit electromagnetic valve and the indoor heat exchanger connect Connect, one end connection of the other end and the expansion apparatuss, the other end connection of the expansion apparatuss is connected with first import.
5. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that in institute State and be provided with check valve between the first end of the first assisted capillary and the branch road.
6. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that described Filter is provided between main capillary tube and the outdoor heat exchanger.
7. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that also wrap Gas-liquid separator is included, the gas-liquid separator is arranged on the major loop, positioned at the outdoor heat exchanger and the compressor Between；Cross valve is provided between the gas-liquid separator and the outdoor heat exchanger.
8. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that in institute State and be provided with electromagnetic valve between major loop and increasing enthalpy loop starting point in parallel and the indoor heat exchanger；The interior is changed Two-way expansion apparatuss are provided between the import of hot device and the outlet of the compressor.
9. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to claim 22Heat pump, it is characterised in that refrigeration Agent is carbon dioxide.
10. the CO for weather lower band air injection enthalpy-increasing loop of extremely trembling with fear according to any one of claim 2-92Heat pump, it is special Levy and be, also including controller, the control capillary tube electromagnetic valve, increasing enthalpy circuit electromagnetic valve and the electromagnetic valve with the control Device connection processed.
CN201710068204.2A 2017-02-06 2017-02-06 Carbon dioxide heat pump with enhanced vapor injection loop for extremely cold weather Active CN106595142B (en)

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