CN104676940B - A kind of Two-stage Compression air source heat pump system - Google Patents
A kind of Two-stage Compression air source heat pump system Download PDFInfo
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- CN104676940B CN104676940B CN201510017197.4A CN201510017197A CN104676940B CN 104676940 B CN104676940 B CN 104676940B CN 201510017197 A CN201510017197 A CN 201510017197A CN 104676940 B CN104676940 B CN 104676940B
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
Abstract
The invention discloses a kind of Two-stage Compression air source heat pump system, it is desirable to provide a kind of heating that effectively can be realized under low-temperature condition, strong adaptability, heating efficiency are high, effect is good, adjust the Two-stage Compression air source heat pump system that control ability is strong, the course of work is stable.Which includes the first compressor, the second compressor, first compressor, the second compressor connection heat supplying pipeline, heat supplying pipeline connects condenser, condenser connects evaporimeter, evaporimeter connects the first compressor, the second compressor, and the second air inlet pipeline is provided with the second air inlet on-off valve, and the first outlet pipe is provided with the first outlet on-off valve, series connection bye-pass is provided with series connection arm on-off valve, and evaporation pipeline is provided with main road expansion valve.The invention has the beneficial effects as follows：The connection in series-parallel switching of double-stage compressor can be carried out, the heat supply in the range of different temperatures is adapted to；With cold-producing medium supercooling apparatus, supercooling coolant can be provided to enter evaporimeter, endothermic effect is more preferable, more stable.
Description
Technical field
The invention belongs to air source heat pump heating technology field, more particularly to a kind of Two-stage Compression air source heat pump system.
Background technology
Standard GB/T/T18430.1-2007《The industry of steam compression cycle cold water (heat pump) unit part 1 or business
With and similar applications cold water (heat pump) unit》、GB/T18430.2-2007《Steam compression cycle cold water (heat pump) unit the 2nd
Cold water (heat pump) unit of part family use and similar applications》The air source heat pump heating operation standard condition of regulation is environment temperature
7 DEG C, 45 DEG C of hot water is produced, minimum environment temperature to -7 DEG C can be run；Standard GB/T/T25127.1-2010《Low environment temperature
Degree air source heat pump (cold water) unit part 1：Industry or heat pump (cold water) unit of business use and similar applications》、GB/
T25127.2-2010《Low ambient temperature air source heat pump (cold water) unit part 2：Family is used and the heat pump of similar applications is (cold
Water) unit》The standard condition of the low ring temperature air source heat pump heating operation of regulation is -12 DEG C of environment temperature, produces 41 DEG C of hot water,
Minimum environment temperature can be run to when -20 DEG C.But in northeast, northwest and high altitude localities, the environment temperature in winter is often low
In -20 DEG C.Current low ring temperature air source heat pump heating system, under low temperature, especially less than -20 DEG C of low-temperature condition, its
There is shortcoming in the aspects such as heating capacity, control ability, regulating power.
The content of the invention
The present invention is to overcome deficiency of the prior art, there is provided a kind of confession that effectively can be realized under low-temperature condition
Warm, strong adaptability, heating efficiency are high, effect is good, adjust the Two-stage Compression air source heat pump that control ability is strong, the course of work is stable
System.
To achieve these goals, the present invention is employed the following technical solutions：
A kind of Two-stage Compression air source heat pump system, including the first compressor, the second compressor, the first described compressor
Gas outlet be connected to the upstream end of heat supplying pipeline by the first outlet pipe, the gas outlet of described the second compressor is by the
Two outlet pipes are connected to heat supplying pipeline upstream end, and the port of export of heat supplying pipeline is connected to the condensation of heating main pipeline heating
The import of device, the outlet of described condenser are connected to evaporimeter by evaporating pipeline, and described evaporimeter passes through the first air inlet
Pipeline is connected to the air inlet of the first compressor, the air inlet of the second compressor is connected to by the second air inlet pipeline, described
Second air inlet pipeline is provided with the second air inlet on-off valve, and the first described outlet pipe is provided with the first outlet on-off valve, described
The first compressor gas outlet and the air inlet of the second compressor between by connect bye-pass connect, described series connection arm
Road is provided with series connection arm on-off valve, and described evaporation pipeline is provided with main road expansion valve.
Preferably, described evaporation pipeline is provided with cold-producing medium supercooling apparatus, described cold-producing medium supercooling apparatus include
Cold-producing medium supercooling apparatus housing, shown cold-producing medium supercooling apparatus housing are provided with main import, primary outlet, secondary import, sub-outlet,
Connected by flow cavity between described main import and primary outlet, connected by flow duct between described secondary import, sub-outlet,
Described flow duct is in flow cavity, and described cold-producing medium supercooling apparatus turn on evaporation pipeline by main import, primary outlet
In, the outlet of described condenser is connected to secondary import by bye-pass is subcooled, and it is logical that described supercooling bye-pass is provided with supercooling
Disconnected valve, supercooling expansion valve.
Preferably, described sub-outlet is connected to series connection bye-pass, described protection pipeline and string by protecting pipeline
The connecting node of connection bye-pass is between series connection arm on-off valve and the second compressor.
Preferably, described flow duct is helix tube, the axis of described helix tube is heavy with the axis of flow cavity
Close, described secondary import, sub-outlet are connected on the side wall of cold-producing medium supercooling apparatus housing.
Preferably, the second described air inlet on-off valve, the first outlet on-off valve, series connection arm on-off valve, supercooling break-make
Valve is magnetic valve.
Preferably, an oil separating device in the first described escaping pipe, the second escaping pipe, is respectively provided with, described oil separation
Device separates inlet end, oil by oil and separates out in the pipeline that gas end is turned on residing for itself, and described oil separating device includes
Cylinder, oil return pipe, the oil extraction end of the oil separating device in the first escaping pipe, in the second escaping pipe is by respective oil return pipe point
The first compressor, the second compressor Tong not be returned, described cylinder side wall upper part is provided with separation air inlet, described cylinder top
Portion is provided with separation escaping pipe, and the bottom in cylinder is stretched in described separation escaping pipe lower end, and the top for separating escaping pipe is oil
Outlet side is separated, the oily gather qi together plate of gear in described cylinder, is provided with, described separation escaping pipe lower end is just to oil baffle gather qi together plate
Upper surface, the gap between oil baffle gather qi together plate lateral edges and cylinder side wall be lower oil-gap, described oil extraction end is in
The bottom of oil separating device.
Preferably, described gear oil gather qi together plate includes assembling plate, oil baffle, described oil baffle outer rim is turned over downwards shape
Into gear gas flange, baffling chamber in described gather qi together plate, is provided with, described oil baffle is provided with the baffling hole connected with baffling chamber, institute
The baffling chamber stated separates inlet end by the baffle pipe oil that is linked back, and described baffle pipe is provided with baffling check valve.
Preferably, described separation escaping pipe is provided with umbrella shape oil-collecting plate, umbrella shape oil-collecting plate it is opening down, umbrella shape is gathered
The top of oiled-plate method with separate it is closely sealed between escaping pipe.
Preferably, described heating supervisor is connected to heat supplying pipeline by a heating arm, on described heating arm
It is provided with heating arm on-off valve.
The invention has the beneficial effects as follows：The connection in series-parallel switching of double-stage compressor can be carried out, is adapted in the range of different temperatures
Heat supply, relative energy consumption are little, and reasonability is good；With cold-producing medium supercooling apparatus, supercooling coolant can be provided to enter evaporimeter, be inhaled
Thermal effect is more preferable, more stable；Anti- overtemperature protection can be carried out to compressor air-discharging end, system work process is stable, long service life.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention；
Fig. 2 is the schematic diagram of compressor series operation heating mode of the present invention；
Fig. 3 is the schematic diagram that compressor parallel of the present invention runs heating mode；
Fig. 4 is the structural representation of cold-producing medium supercooling apparatus of the present invention；
Fig. 5 is the schematic diagram of the embodiment of the present invention 2；
Fig. 6 is the structural representation of oil separating device in the embodiment of the present invention 2.
In figure：First compressor 1, the second compressor 2, heat supplying pipeline 3, condenser 4, evaporation pipeline 5, evaporimeter 6, first
Air inlet pipeline 7, the second air inlet pipeline 8, the second air inlet on-off valve 9, the first outlet on-off valve 10, series connection bye-pass 11, series connection
Pipe on-off valve 12, oil separating device 13, oil return pipe 14, main road expansion valve 15, cold-producing medium supercooling apparatus 16, supercooling apparatus housing
17th, main import 18, primary outlet 19, secondary import 20, sub-outlet 21, flow duct 22, supercooling on-off valve 23, supercooling expansion valve 24, guarantor
Pillar road 25, flow cavity 26, heating main pipeline 27, cylinder 28, separation air inlet 29, separation escaping pipe 30, the oily gather qi together plate of gear
31st, assemble plate 32, oil baffle 33, gear gas flange 34, baffling hole 35, baffling check valve 36, umbrella shape oil-collecting plate 37, heating arm to lead to
Disconnected valve 38.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1：In embodiment as shown in Figure 1, Figure 2, Figure 3, Figure 4, Two-stage Compression air source heat pump system, including the
One compressor 1, the second compressor 2, the gas outlet of the first described compressor is connected to heat supplying pipeline 3 by the first outlet pipe
Upstream end, the gas outlet of the second described compressor is connected to the upstream end of heat supplying pipeline, heat supply by the second outlet pipe
The port of export of pipeline is connected to the import of the condenser 4 to heating main pipeline heating, and the outlet of described condenser passes through to steam
Send out pipeline 5 and be connected to evaporimeter 6, described evaporimeter is connected to the air inlet of the first compressor, is led to by the first air inlet pipeline 7
The air inlet that the second air inlet pipeline 8 is connected to the second compressor is crossed, the second described air inlet pipeline is provided with the second air inlet break-make
Valve 9, the first described outlet pipe are provided with the first outlet on-off valve 10, and the gas outlet of the first described compressor is pressed with second
Connected by bye-pass 11 of connecting between the air inlet of contracting machine, described series connection bye-pass is provided with series connection arm on-off valve 12,
Described evaporation pipeline is provided with main road expansion valve 15.
Two-stage Compression air source heat pump system can realize series-parallel switching, and which can be in -35 DEG C～-15 DEG C of ultralow temperature
Under environment, by compressor series operation heating mode, heat pump absorbs the low enthalpy value heat of surrounding air, produces 45 DEG C of hot water
To give heating supervisor's heat transfer heating；Also mould can be heated by compressor parallel operation under the low ambient temperature higher than -15 DEG C
Formula, absorbs the low enthalpy value heat of surrounding air, and the hot water for producing 45 DEG C is heated.Above-mentioned heating supervisor, is exactly that heating is outer
Heat conduction pipeline in portion's pipe-line system, can connect thereon, arrange fan coil to carry out heat conduction heating or pass through flooring radiation
To heat, ways of heating can be selected depending on use environment, condition.
Described evaporation pipeline is provided with cold-producing medium supercooling apparatus 16, and described cold-producing medium supercooling apparatus include supercooling apparatus
Housing 17, described supercooling apparatus housing are provided with main import 18, primary outlet 19, secondary import 20, sub-outlet 21, and described master enters
Mouthful connected by flow cavity 24 between primary outlet, connected by flow duct 22 between described secondary import, sub-outlet, it is described
Flow duct be in flow cavity, described cold-producing medium supercooling apparatus are turned in evaporation pipeline by main import, primary outlet, institute
The outlet of the condenser stated is connected to secondary import by bye-pass is subcooled, and described supercooling bye-pass is provided with supercooling on-off valve
23rd, expansion valve 24 is subcooled.
Described sub-outlet is connected to series connection bye-pass, described protection pipeline and bye-pass of connecting by protecting pipeline 25
Connecting node be in series connection arm on-off valve and the second compressor between.
Described flow duct is helix tube, and the described axis of helix tube is overlapped with the axis of flow cavity, described
Secondary import, sub-outlet are connected on the side wall of supercooling apparatus housing.Helix tube relative length is bigger, supercooling when contact area more
Greatly, therefore effect is subcooled more preferably, operating efficiency can be improved.
Described the second air inlet on-off valve, the first outlet on-off valve, series connection arm on-off valve, supercooling on-off valve are electromagnetism
Valve., beneficial to control, reaction is fast, and regulating power is strong for magnetic valve.
As shown in Fig. 2 compressor is under series operation heating mode, the second air inlet on-off valve, the first outlet on-off valve
Close, series connection arm on-off valve, supercooling on-off valve are opened, the operation of cold-producing medium supercooling apparatus, equivalent to the first compressor, the second pressure
Contracting machine, condenser, cold-producing medium supercooling apparatus, evaporator series.
Compressor series operation heating mode：Low-temperature refrigerant absorbs the low enthalpy value heat of -35 DEG C～-15 DEG C of environment temperature
Amount, flashes to low-temp low-pressure superheated steam, is discharged after the first compressor compresses to intermediate pressure, and cold-producing medium is by series connection then
Arm on-off valve enters the second compressor, and the second compressor compresses of Jing are into high-temperature high-pressure refrigerant steam, high-temperature high-pressure refrigerant
Heat is conducted to heating supervisor namely uses side water by the condensed device of steam, is supplied after being heated to 45 DEG C using the water temperature of side water
It is warm to use, become middle temperature high pressure refrigerant liquid after high-temperature high-pressure refrigerant steam is condensed, refrigerant liquid enters cold-producing medium mistake
Device for cooling, supercooling bye-pass, after the cold-producing medium of supercooling bye-pass part is throttled by supercooling expansion valve, temperature drop is led to
Heat transfer is crossed cryogen to main road and is subcooled, and it is exactly to refer to the cold-producing medium for flowing through flow cavity that main road crosses cryogen.Main road after supercooling
Refrigerant liquid passes through the throttling expansion of main road expansion valve into the gas-fluid two-phase mixture of low-temp low-pressure, into evaporimeter, absorbs
After the heat of low enthalpy value air (- 35 DEG C), low-temp low-pressure superheated steam is flashed to, cold-producing medium enthalpy increases, into the first compression
Machine is re-compressed, and whole circulation goes round and begins again, and heat is constantly absorbed from extraneous low ambient temperature, then by heat lift, is produced
45 DEG C of hot water supply indoor heating.
Known in the industry, the delivery temperature of compressor needs control below 120 DEG C, otherwise just easily causes damage, causes peace
Full hidden danger is increased.But under the use environment of the present invention, compressor power consumption is big, it is also inevitable that its delivery temperature is relatively higher
's.And in the course of work under above-mentioned compressor series operation heating mode, the cold-producing medium through bye-pass is subcooled can lead to
Overprotection pipeline is returned between intermediate pressure section, i.e. the first compressor, the second compressor series via, cools down the first compressor
Delivery temperature, not only re-used this some refrigerant, and cooling protection can have been carried out, improved system work process
Stability, security and service life.Furthermore, this protected mode is just relatively more suitable under compressor series operation heating mode
Operation is closed, when compressor parallel runs, after this some refrigerant is sent to the suction end of compressor, the suction end with evaporimeter is
UNICOM, the evaporability of evaporimeter will be affected, so as to cause heat pump to absorb heat from low ambient temperature reduction；But in compressor string
Under through transport row heating mode, this some refrigerant is sent between the first compressor and the second compressor series via, Bu Huiying
The heat absorption to evaporimeter is rung, on the contrary due to reducing the cold-producing medium enthalpy into evaporimeter so that the heat absorption capacity of evaporimeter is more
By force, so that the heating capacity of heat pump is extremely strong, now just without considering the problems referred to above, the work of its control compressor exhaust temperature
With just very significantly, positive income is much greater with effect.
As shown in figure 3, compressor is under parallel running heating mode, the second air inlet on-off valve, the first outlet on-off valve
Open, series connection arm on-off valve, supercooling on-off valve are closed, and cold-producing medium supercooling apparatus do not run, the first compressor, the second compressor
After parallel connection, it is sequentially connected in series with condenser, evaporimeter.
Compressor parallel runs heating mode：Low-temperature refrigerant absorbs the low enthalpy value heat of -15 DEG C of environment temperature, flashes to
Low-temp low-pressure superheated steam, while respectively by the first compressor and the second compressor compresses into high-temperature high-pressure refrigerant steam, it is high
Heat is conducted to, using side water, supply after being heated to 45 DEG C using the water temperature of side water by the condensed device of warm high pressure refrigerant vapor
It is warm to use, become middle temperature high pressure refrigerant liquid after high-temperature high-pressure refrigerant steam is condensed, flow through main road expansion valve throttling expansion
Into the gas-fluid two-phase mixture of low-temp low-pressure, into evaporimeter, after absorbing the heat of low enthalpy value air (- 15 DEG C), flash to low
Warm low-pressure superheated steam, cold-producing medium enthalpy increase, re-compress into the first compressor, the second compressor, the whole circulating cycle and
Renew, heat is constantly absorbed from low ambient temperature, then by heat lift, is produced 45 DEG C of hot water and is supplied indoor heating.
Embodiment 2：With embodiment 1, its difference is the basic structure and embodiment of the present embodiment, such as Fig. 5, figure
Shown in 6, an oil separating device 13 in described the first escaping pipe, the second escaping pipe, is respectively provided with, described oil separating device leads to
Cross oil separation inlet end, oil to separate out in the pipeline that gas end is turned on residing for itself, described oil separating device includes cylinder
28th, oil return pipe 14, the oil extraction end of the oil separating device in the first escaping pipe, in the second escaping pipe are distinguished by respective oil return pipe
Lead to back the first compressor, the second compressor, described cylinder side wall upper part is provided with separation air inlet 29, described cylinder top
Portion is provided with separation escaping pipe 30, and the bottom in cylinder is stretched in described separation escaping pipe lower end, and the top for separating escaping pipe is
Oil separates outlet side, and the oily gather qi together plate 31 of gear is provided with described cylinder, and described separation escaping pipe lower end is just poly- to oil baffle
The upper surface of gas plate, the gap between oil baffle gather qi together plate lateral edges and cylinder side wall be lower oil-gap, described oil extraction end
It is in the bottom of oil separating device.
All it is as a rule that its effect is exactly will with lubricating oil (also referred to as refrigeration oil), oil separating device in compressor
Refrigeration oil in the high steam that compressor is discharged is separated, to ensure that compressor safely and efficiently runs, while avoiding cold
Frozen oil loss is too fast.After steam is discharged from compressor with refrigeration oil, from separation air inlet tangentially into cylinder, and along
Cylinder inwall forms swirling eddy, and under centrifugal force and Action of Gravity Field, refrigeration oil separated, into drop, passes through along under barrel
Cross down oil-gap to flow to below the oily gather qi together plate of gear, and compressor is supplied back again by oil extraction end, oil return pipe.And steam is then gathered
On the oily gather qi together plate of gear, discharge along escaping pipe is separated.Wherein, the flight or guiding of secondary air rotation can be set in cylinder
Piece, can also arrange on oil return pipe prevents adverse current, the check valve of inverse punching or oil well pump.
Described gear oil gather qi together plate includes assembling plate 32, oil baffle 33, and described oil baffle outer rim is turned over downwards to form gear
Gas flange 34, is provided with baffling chamber in described gather qi together plate, described oil baffle is provided with the baffling hole 35 connected with baffling chamber, institute
The baffling chamber stated separates inlet end by the baffle pipe oil that is linked back, and described baffle pipe is provided with baffling check valve 36.With freezing
Although the steam major part of oil can be gathered on the oily gather qi together plate of gear, discharge along escaping pipe is separated, also some can enter
Lower oil-gap, this some vapor easily again will be empty above the oily gather qi together plate of middle gear in the refrigeration oil separated under filter again band cylinder
In, and discharge from escaping pipe is separated, and the presence of gas flange is kept off, the steam of these " two sub-band oil " can be caused to be difficult from gear oil
Return to below gather qi together plate top, and can along baffling hole, baffling chamber, baffle pipe be linked back oil separate inlet end, carry out secondary oil
From, the loss of refrigeration oil is further reduced, is increased operation rate, reduces cost.
Described separation escaping pipe is provided with umbrella shape oil-collecting plate 37, umbrella shape oil-collecting plate it is opening down, umbrella shape oil-collecting plate
Top with separate it is closely sealed between escaping pipe.Umbrella shape oil-collecting plate one this can aid in oil droplet attachment build up, second can reduce separation outlet
The internal turbulence caused by ascending air around pipe outer wall, improves continuity, the stability of whole cylinder interior air-flow.
Described heating supervisor is connected to heat supplying pipeline by a heating arm, and described heating arm is provided with heating
Pipe on-off valve 38.When compressor exhaust temperature reaches the upper limit, also low-temperature water heating absorption can be introduced from using side by the arm that heats
Heat of compressor, so as to reduce compressor exhaust temperature, while after low-temperature water heating is heated, returning to and being heated using side；Work as exhaust
During the lower limit of temperature drop to standard value, heat of compressor is reclaimed and is stopped.The recovery of compressor air-discharging waste heat, reclaims remaining reaching
While hot, compressor exhaust temperature and oil temperature can be also reduced, it is ensured that compressor is run steadily in the long term.
Claims (7)
1. a kind of Two-stage Compression air source heat pump system, is characterized in that, including the first compressor, the second compressor, described
The gas outlet of one compressor is connected to the upstream end of heat supplying pipeline by the first outlet pipe, the outlet of described the second compressor
Mouth is connected to heat supplying pipeline upstream end by the second outlet pipe, and the port of export of heat supplying pipeline is connected to supply to heating main pipeline
The import of warm condenser, the outlet of described condenser are connected to evaporimeter by evaporating pipeline, and described evaporimeter passes through
First air inlet pipeline is connected to the air inlet of the first compressor, the air inlet of the second compressor is connected to by the second air inlet pipeline
Mouthful, the second described air inlet pipeline is provided with the second air inlet on-off valve, and the first described outlet pipe is provided with the first outlet and leads to
Disconnected valve, is connected by bye-pass of connect between the gas outlet of described the first compressor and the air inlet of the second compressor, described
Series connection bye-pass be provided with series connection arm on-off valve, described evaporation pipeline is provided with main road expansion valve, described evaporation tube
Road is provided with cold-producing medium supercooling apparatus, and described cold-producing medium supercooling apparatus include cold-producing medium supercooling apparatus housing, shown refrigeration
Agent supercooling apparatus housing is provided with main import, primary outlet, secondary import, sub-outlet, passes through between described main import and primary outlet
Flow cavity is connected, and by flow duct connection between described secondary import, sub-outlet, described flow duct is in flow cavity, institute
The cold-producing medium supercooling apparatus stated are turned in evaporation pipeline by main import, primary outlet, and the outlet of described condenser passed through
Cold bye-pass is connected to secondary import, and described supercooling bye-pass is provided with supercooling on-off valve, supercooling expansion valve, described sub-outlet
Series connection bye-pass is connected to by protecting pipeline, described protection pipeline is in series connection arm with the connecting node of bye-pass of connecting
Between on-off valve and the second compressor.
2. a kind of Two-stage Compression air source heat pump system according to claim 1, is characterized in that, described flow duct is spiral shell
Coil, the described axis of helix tube are overlapped with the axis of flow cavity, and described secondary import, sub-outlet are connected to cold-producing medium
On the side wall of supercooling apparatus housing.
3. a kind of Two-stage Compression air source heat pump system according to claim 1, is characterized in that, the second described air inlet is led to
Disconnected valve, the first outlet on-off valve, series connection arm on-off valve, supercooling on-off valve are magnetic valve.
4. a kind of Two-stage Compression air source heat pump system according to claim 1, is characterized in that, the first described outlet
An oil separating device is respectively provided with pipe, the second escaping pipe, described oil separating device separates inlet end, oil by oil and separates out gas
In the pipeline that end turns on residing for itself, described oil separating device includes cylinder, oil return pipe, in the first escaping pipe, second
The oil extraction end of the oil separating device in escaping pipe leads to go back to the first compressor, the second compressor, institute respectively by respective oil return pipe
The cylinder side wall upper part stated is provided with separation air inlet, and separation escaping pipe is provided with the top of described cylinder, and described isolates
The bottom in cylinder is stretched in tracheae lower end, and the top for separating escaping pipe separates outlet side for oil, is provided with described cylinder
The oily gather qi together plate of gear, the upper surface of described separations escaping pipe lower end just to oil baffle gather qi together plate, oil baffle gather qi together plate lateral edges and
Gap between the wall of cylinder side is lower oil-gap, and described oil extraction end is in the bottom of oil separating device.
5. a kind of Two-stage Compression air source heat pump system according to claim 4, is characterized in that, described gear oil gather qi together plate
Including aggregation plate, oil baffle, described oil baffle outer rim is turned over downwards to form gear gas flange, is provided with baffling in described gather qi together plate
Chamber, described oil baffle are provided with the baffling hole connected with baffling chamber, described baffling chamber by baffle pipe be linked back oil separate into
Gas end, described baffle pipe are provided with baffling check valve.
6. a kind of Two-stage Compression air source heat pump system according to claim 4 or 5, is characterized in that, described isolates
Tracheae is provided with umbrella shape oil-collecting plate, umbrella shape oil-collecting plate it is opening down, the top of umbrella shape oil-collecting plate with separate it is close between escaping pipe
Close.
7. a kind of Two-stage Compression air source heat pump system according to claim 1, is characterized in that, described heating supervisor is logical
Cross a heating arm and be connected to heat supplying pipeline, described heating arm is provided with heating arm on-off valve.
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| CN114234487A (en) * | 2021-12-23 | 2022-03-25 | 中电建路桥集团有限公司 | Carbon dioxide variable circulating water source heat pump and hot water unit |
| CN117502249B (en) * | 2024-01-04 | 2024-03-29 | 华北理工大学 | Heat pump coupling system for heating animal house and heating method |
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| CN203323365U (en) * | 2013-05-24 | 2013-12-04 | 顺德职业技术学院 | Heat-pump water heater |
| CN203642549U (en) * | 2013-11-14 | 2014-06-11 | 广东美的暖通设备有限公司 | Compressor unit system and heat pump system |
-
2015
- 2015-01-14 CN CN201510017197.4A patent/CN104676940B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884061Y (en) * | 2005-12-23 | 2007-03-28 | 中国科学院理化技术研究所 | Warmmer air source heat-pump device of parallel compressor able to achieve tow-stage compression |
| CN101713599A (en) * | 2009-11-09 | 2010-05-26 | 刘雄 | Air-conditioning heat pump device |
| CN101871690A (en) * | 2010-06-24 | 2010-10-27 | 东南大学 | Single and double level water-source heat pump water heater coupling device and method |
| CN203323365U (en) * | 2013-05-24 | 2013-12-04 | 顺德职业技术学院 | Heat-pump water heater |
| CN203642549U (en) * | 2013-11-14 | 2014-06-11 | 广东美的暖通设备有限公司 | Compressor unit system and heat pump system |
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| CN104676940A (en) | 2015-06-03 |
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Address after: 315336 Workshop No. 173 Binhai Second Road, Hangzhou Bay New Area, Ningbo City, Zhejiang Province-C7 Patentee after: Ningbo Meike Carbon Dioxide Heat Pump Technology Co., Ltd. Address before: 315326, Zhejiang Province, Ningbo City, Cixi province Chang town, Cang Tian Lu Lu 875 Patentee before: Ningbo Sai Sen energy-saving equipment Co., Ltd |