CN107514830A - A kind of single multi-stage compression automatic conversion Multifunctional heat pump system - Google Patents
A kind of single multi-stage compression automatic conversion Multifunctional heat pump system Download PDFInfo
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- CN107514830A CN107514830A CN201610433472.5A CN201610433472A CN107514830A CN 107514830 A CN107514830 A CN 107514830A CN 201610433472 A CN201610433472 A CN 201610433472A CN 107514830 A CN107514830 A CN 107514830A
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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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
- 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
- F25B49/022—Compressor control arrangements
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The present invention relates to the Multifunctional heat pump system that a kind of single multi-stage compression is freely changed, at least two compressors, respectively high and low compressor of arbitrarily downgrading；At least two expansion valves, respectively high pressure throttle to middle pressure throttling, high pressure to low pressure；At least two four-way reversing valves, one is responsible for single Two-stage Compression switching, and one is responsible for refrigeration and heating switching.System judges according to collection refrigeration system pressure and temperature, by automatically controlling for each valve, can realize list, multi-stage refrigerating, heating, water heating, refrigeration+hot water, cooling, hot water+cooling etc..In refrigeration+hot water, cooling+hot water, heating+cooling, total heat recovery is realized.Under bad working environments, multi-stage compression Effec-tive Function can be realized, during nominal situation, be converted into single stage compress operation.When multi-stage compression is run, the working capacity and quantity of compressors at different levels, systematic economy operation can be changed automatically.Run by multi-stage compression, can also efficiently produce ultralow temperature and superhigh temperature.
Description
Technical field
The invention belongs to heat energy technology field of freezing, more particularly to a kind of single multi-stage compression automatic conversion multifunctional heat pump system
System.
Background technology
The defrost of source pump and low-temperature heating problem annoying many manufacturing firms always, govern heat pump air conditioner, heat
The popularization of pump water heater and multifunctional heat pump and application.The producer having at present uses air compensating system, but air supply compressor is only
Have just has in the customization of compressor producer, and application is smaller, and the heating capacity of air compensating system only increases about 10 ~ 20%.Air supply compressor
Due to adding compression travel, run under conventional operating mode and do not save.Heating radiator needs to produce more than 50 degree of hot water,
Drying temperature is typically more than 60 degree, and under extreme low temperature environment, air compensating system is for Two-stage Compression there is also system
Thermal effect is bad, inefficient phenomenon.
Air source heat pump also has Two-stage Compression at present, but summer outdoor temperature is not very high, and original Two-stage Compression is not
All operating mode needs can be met very well, operational efficiency is not high, in addition, the capacity of Two-stage Compression can not change, can not ensure system
It is in optimal economic running status.
Existing trilogy supply unit when running refrigeration+hot water, also can recovering condensing heat amount, but required for air-conditioning and hot water
Cold and hot amount seriously mismatches, and summer hot water demand amount is smaller；Because air-source trilogy supply does not have freezing and refrigeration function, and it is long-term
Heat caused by freezing and refrigeration is needed then to reclaim.In addition, the temperature of trilogy supply unit supplying hot water typically will than heating temperature
Height, although single stage compress can meet the Effec-tive Function that heats, hot water Effec-tive Function can not be fully met.
The content of the invention
The Multifunctional heat pump system of automatic conversion is capable of in a kind of single multi-stage compression of the present invention, using the teaching of the invention it is possible to provide refrigeration, heating, heat
Water, cooling and combinations thereof function, according to function actual motion temperature, environment temperature, delivery temperature, high, normal, basic pressure and other parameters,
It is automatic to judge regulation operation number of compression stages, compressor operating number of units is automatically adjusted, automatically adjusts compressor operating capacity or operation
Frequency, whole system operation is set to keep efficient state.Multifunctional heat pump system is when running part combination function, such as：Refrigeration+heat
Water, heating+cooling, during hot water+cooling combination function, itself can reclaim cold and hot amount, and operational efficiency is at a relatively high.
The technical solution adopted in the present invention is：A kind of single multi-stage compression automatic conversion Multifunctional heat pump system, is at least wrapped
Include two compressors：High pressure stage compressor（1）With low-pressure stage compressor（2）；At least two expansion valves：Main expansion valve（17）With
Middle compression swelling valve（18）, main expansion valve（17）It is responsible for throttling from high pressure to low pressure, middle compression swelling valve（18）It is responsible for from high pressure in
Pressure throttling；At least two four-way reversing valves：Four-way reversing valve（7）And four-way reversing valve（9）, wherein four-way reversing valve（7）It is negative
Duty refrigeration（Defrost）Switch with heating, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching；At least two heat exchangers, wherein
One is source heat exchanger（10）, other is using side heat exchanger, such as：Air-conditioning heat exchanger（11）, hot water heat exchanger（12）, cooling
Heat exchanger（26）.
The air intake duct of described compressors at different levels is all connected on an air suction main, is set between adjacent compressors at different levels
Check valve（3（1））；Four-way reversing valve（9）C pipes on pass through check valve（3(2)）With high stage compressor（1）Blast pipe phase
Even, compressor（1）Check valve is also provided with blast pipe（3（3））；Four-way reversing valve（9）E pipe and charge air cooler（19）Import phase
Connect, or direct and high stage compressor（1）Air intake duct be connected；Four-way reversing valve（9）S pipe and low-pressure stage compressor（2）Return
Tracheae is connected；Four-way reversing valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected.
Described middle compression swelling valve (18) throttling outlet sets charge air cooler（19）, charge air cooler（19）There are three imports, one
With middle compression swelling valve（18）It is connected, one is connected with condensate line, a four-way reversing valve（9）E pipe be connected；Charge air cooler（19）
Tracheae outlet is connected with high stage compressor muffler, is arranged on check valve (3（1）) exit, liquid pipe outlet connection master it is swollen
Swollen valve（17）Entrance；Middle compression swelling valve（18）Refrigerant after throttling is in charge air cooler（19）Interior evaporation, to the system in condensate line
Cryogen supplies main expansion valve after being subcooled（17）, and combination cooling is carried out to the discharge refrigerant of low one stage of compression, then make
For higher leveled compressor air suction.
Described charge air cooler（19）It may also set up two imports, one and middle compression swelling valve（18）Throttling outlet is connected, and one
Individual and four-way reversing valve（9）E pipe be connected, charge air cooler（19）The discharge refrigerant of the refrigerant of interior evaporation and low one stage of compression enters
Row combination cooling.Regenerator is set on compressor return air pipes at different levels（29）And regenerator（30）, compressor return airs at different levels are carried out
Overheat, while refrigerant before corresponding expansion valves at different levels is subcooled.Charge air cooler（19）Liquid refrigerant outlet pass through it is unidirectional
Valve（3（7））And regenerator（29）It is connected, liquid refrigerant is in regenerator（29）Main expansion valve is supplied after interior supercooling（17）；Gaseous state
Refrigerant outlet and regenerator（30）It is connected, into regenerator（30）After overheat, as higher leveled compressor air suction；In backheat
Device（29）And regenerator（30）Feed tube between bypass solenoid valve is set（31）.
Described each heat exchanger passes through main expansion valve（17）Star parallel-connection structure can be formed：Air-conditioning heat exchanger（11）, source
Heat exchanger（10）, hot water heat exchanger（12）, cooling heat exchanger（26）The liquid pipe of four heat exchangers by multiple magnetic valves (13,14,
15th, 25) it is connected.Hot water heat exchanger（12）Tracheae be directly connected with hiigh pressure stage blast pipe, cooling heat exchanger（26）It is directly and low
Muffler of arbitrarily downgrading is connected；Air-conditioning heat exchanger（11）With source heat exchanger（10）Respectively and four-way reversing valve（7）E pipe and c pipe phases
Even；Pass through each magnetic valve and four-way reversing valve（7）Switch control, each two heat exchanger pass through main expansion valve（17）With compressor shape
Into kind of refrigeration cycle, without passing through other heat exchangers.
Described heat exchanger liquid pipe magnetic valve may also set up at the tracheae of each heat exchanger, such as magnetic valve（13）, magnetic valve
（14）, magnetic valve（15）It is respectively placed in source heat exchanger（10）, air-conditioning heat exchanger（11）, hot water heat exchanger（12）Tracheae on,
Each heat exchanger liquid pipe passes through multiple check valves（3）It is connected.
Described hot water heat exchanger（12）Four-way reversing valve is set between hiigh pressure stage blast pipe（8）, it is characterized in that：Four-way
Reversal valve（8）C pipe and hot water heat exchanger（12）Tracheae is connected, and d pipes are connected with hiigh pressure stage blast pipe, time of s pipes and low-pressure stage
Tracheae is connected, the closure of e pipes；Main expansion valve（17）Outlet pass through check valve（3（4））And hot water heat exchanger（12）Liquid pipe phase
Even.
Described cooling heat exchanger（26）Four-way reversing valve is set between hiigh pressure stage blast pipe（27）, it is easy to inversely change
Frost, it is characterized in that：Four-way reversing valve（27）E pipe and cooling heat exchanger（26）Tracheae is connected, d pipes and hiigh pressure stage blast pipe phase
Even, s pipes are connected with the muffler of low-pressure stage, the closure of c pipes；Main expansion valve（17）Outlet pass through check valve（3（5））, magnetic valve
（25）With cooling heat exchanger（26）Liquid pipe be connected.
Described hot water heat exchanger（12）It may be disposed at four-way reversing valve（7）Between hiigh pressure stage blast pipe, hot water heat exchange
Device（12）Import be connected with hiigh pressure stage blast pipe, outlet and four-way reversing valve（7）D pipe be connected.
Described cooling heat exchanger（26）And expansion valve（28）After series connection, and magnetic valve（25）Parallel connection, returned loaded on low-pressure stage
On tracheae；In cooling heat exchanger（26）When need not work, magnetic valve（25）It is bypassed.
Multiple compressors, including compressor can be set in described low-pressure stage（2）With compressor (20), and in each compressor
Blast pipe sets check valve（3）.
Described three stage compression system increase intermediate pressure compressor（21）, corresponding throttle expansion valve（23）, corresponding charge air cooler
（24）, corresponding four-way reversing valve（22）, it is characterized in that：Compressor（21）Blast pipe pass through check valve（3（6））, and four-way changes
To valve（9）The one-way valved outlet pipe of c pipes is converged, and is connected to four-way reversing valve（22）D is managed；Charge air cooler（24）Three imports point
Other and expansion valve（23）Throttling outlet, four-way reversing valve（22）E pipe be connected with the liquid pipe of condenser；Charge air cooler（24）Tracheae goes out
Mouth and high stage compressor（1）Muffler is connected, and liquid pipe outlet connects compression swelling valve (18) and charge air cooler in low one-level（19）'s
Entrance；Check valve is set between the air-breathing of adjacent two-stage compressor（3（3））.
Described compressor exhaust pipe can increase oil eliminator（5）With oil return capillary（6）, the air intake duct of compressor can increase
Aerating liquid/gas separator（4）, reservoir can be increased before expansion valve（16）.
Beneficial effect
Refrigeration, heating, hot water, cooling and combinations thereof function can be provided, the application function of heat pump is extended, high temperature can be produced,
Can apply needs the place of high temperature in drying, heating etc.；Low temperature can be produced, can be applied in freezing and refrigeration place.
The application of heat pump is expanded, enables equal energy Effec-tive Function under the various operating modes of heat pump, can be high in extreme low temperature
The heating of effect, can efficiently it freeze under thermal extremes.
Energy-saving effect is improved, according to function actual motion temperature, environment temperature, delivery temperature, high, normal, basic pressure and other parameters,
It is automatic to judge regulation operation number of compression stages, compressor operating number of units is automatically adjusted, automatically adjusts compressor operating capacity or operation
Frequency, whole system operation is set to keep efficient state.Multifunctional heat pump system is when running part combination function, such as：Refrigeration+heat
Water, heating+cooling, during hot water+cooling combination function, itself can reclaim cold and hot amount, and operational efficiency is at a relatively high.
Brief description of the drawings
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 1 of Fig. 1；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 2 of Fig. 2；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 3 of Fig. 3；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 4 of Fig. 4；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 5 of Fig. 5；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 6 of Fig. 6；
The mono- Two-stage Compression automatic conversion Multifunctional heat pump system schematic diagrames 7 of Fig. 7；
The mono- multi-stage compression automatic conversion Multifunctional heat pump system schematic diagrames 8 of Fig. 8.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
As shown in figure 1, Multifunctional heat pump system includes：High pressure stage compressor（1）, low-pressure stage compressor（2）, main electric expansion valve
（17）, middle pressure electric expansion valve（18）, four-way reversing valve（7）, four-way reversing valve（9）, charge air cooler（19）, source heat exchanger
（10）, air-conditioning heat exchanger（11）, hot water heat exchanger（12）, cooling heat exchanger（26）, multiple check valves（3）, multiple magnetic valves
（13、14、15、25）, reservoir（16）.
Compressor（1）And compressor（2）Muffler pass through check valve（3（1））It is connected on a return-air house steward；Four-way
Reversal valve（9）C pipes on pass through check valve（3(2)）With high stage compressor（1）Blast pipe be connected, compressor（1）Blast pipe
On be also provided with check valve（3（3））；Four-way reversing valve（9）E pipe and charge air cooler（19）Import is connected, four-way reversing valve（9）S
Pipe and low-pressure stage compressor（2）Muffler is connected；Four-way reversing valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected；
Charge air cooler（19）There are three imports, one and middle compression swelling valve（18）It is connected, one is connected with condensate line, a four-way commutation
Valve（9）E pipe be connected；Charge air cooler（19）Tracheae outlet is connected with high stage compressor muffler, is arranged on check valve (3（1）)
Exit, liquid pipe outlet connection main expansion valve（17）Entrance；Air-conditioning heat exchanger（11）, source heat exchanger（10）, hot water heat exchange
Device（12）, cooling heat exchanger（26）The liquid pipe of four heat exchangers is connected by multiple magnetic valves (13,14,15,25), each heat exchanger
Pass through expansion valve（17）Form star parallel-connection structure；Hot water heat exchanger（12）Tracheae be directly connected with hiigh pressure stage blast pipe, be cold
But heat exchanger（26）Directly it is connected with low-pressure stage muffler；Air-conditioning heat exchanger（11）With source heat exchanger（10）Changed respectively with four-way
To valve（7）E pipe and c manage be connected.
Middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure.Four-way
Reversal valve（7）It is responsible for refrigeration（Defrost）Switch with heating, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching.Charge air cooler（19）
Refrigerant in condensate line is subcooled for inner refrigerant evaporation, and to low-pressure stage compressor（2）Exhaust carries out combination cooling,
Then it is used as high pressure stage compressor（1）Air-breathing.Source heat exchanger（10）It is responsible for absorbing or releasing low-grade from external environment
Heat, air-conditioning heat exchanger are responsible for providing cold and hot amount to air-conditioned room, and hot water heat exchanger is responsible for heating required hot water, cooling heat exchanger
For freezing and refrigeration.Each heat exchanger forms star parallel-connection structure by main expansion valve (17)；Commutated by each magnetic valve and four-way
Valve（7）Switch control, each two heat exchanger form kind of refrigeration cycle by main expansion valve (17) and compressor, without by other
Heat exchanger.Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）And four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling action.
Single stage compress heating circulation：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve
(17) throttling action is played.
Single stage compress heats water circulation：
Magnetic valve（13）, magnetic valve（15）Open, magnetic valve（14）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve
(17) throttling action is played.
Single stage compress cooling circulation：
Magnetic valve（13）, magnetic valve（25）Open, magnetic valve（15）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with c, e is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve
(17) throttling action is played.
Single stage compress freezes+heat water circulation：
Magnetic valve（14）, magnetic valve（15）Open, magnetic valve（13）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with c, e is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve
(17) throttling action is played.
Single stage compress water heating+cooling circulation：
Magnetic valve（25）, magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling action.
Single stage compress circulation also has heating+cooling, refrigeration+cooling, heating+hot water, heating+hot water+cooling, refrigeration+heat
The combinations such as water+cooling circulate, and repeat no more here.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Two-stage compression cycle four-way reversing valve（9）D be connected with e,
C is connected with s, and middle pressure electric expansion valve (18) is opened and is responsible for high pressure is responsible for high pressure to middle pressure throttling, main electric expansion valve (17)
Throttled to low pressure；Middle compression swelling valve（18）Refrigerant after throttling is in charge air cooler（19）Interior evaporation, to the refrigeration in condensate line
Agent supplies main expansion valve after being subcooled（17）, and to low-pressure stage compressor（2）Exhaust carry out combination cooling, then as height
Arbitrarily downgrade compressor（1）Air-breathing.Other Valve controllings and single stage compress control are identical, repeat no more.
Embodiment 2
As shown in Fig. 2 Multifunctional heat pump system includes：High pressure stage compressor（1）, low-pressure stage compressor（2）, main electric expansion valve
(17), middle pressure electric expansion valve (18), four-way reversing valve（7）, four-way reversing valve（9）, charge air cooler（19）, source heat exchanger
（10）, air-conditioning heat exchanger（11）, multiple check valves（3）, magnetic valve（29）, two oil eliminators（5）And oil return capillary（6）.
Compressor（1）And compressor（2）Muffler pass through check valve（3）It is connected on a return-air house steward；Four-way changes
To valve（9）C pipes on pass through another check valve（3）With high stage compressor（1）Blast pipe be connected, compressor（1）Blast pipe
On be also provided with check valve（3）；Four-way reversing valve（9）E pipe and charge air cooler（19）Import is connected, four-way reversing valve（9）S pipe and
Low-pressure stage compressor（2）Muffler is connected；Four-way reversing valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected；In it is cold
Device（19）Two imports, one and middle compression swelling valve are set（18）Throttling outlet is connected, a four-way reversing valve（9）E pipe phases
Even, charge air cooler（19）The refrigerant and low-pressure stage compressor of interior evaporation（2）Exhaust carries out combination cooling.High pressure stage compressor（1）
With low-pressure stage compressor（2）Regenerator is set respectively on each muffler（29）And regenerator（30）, to the return-air of associated compressors
Overheated, while refrigerant before corresponding expansion valve is subcooled.Charge air cooler（19）Liquid refrigerant outlet pass through it is unidirectional
Valve（3）And regenerator（29）It is connected, liquid refrigerant is in regenerator（29）Low-pressure stage main expansion valve (17) is supplied after interior supercooling；Gas
State refrigerant outlet and regenerator（30）It is connected, into regenerator（30）After overheat, the compressor as hiigh pressure stage（1）Air-breathing；
In regenerator（29）And regenerator（30）Feed tube between bypass solenoid valve is set（31）.
Middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure.Four-way
Reversal valve（7）It is responsible for refrigeration（Defrost）Switch with heating, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching.Charge air cooler（19）
Inner refrigerant evaporation carries out combination cooling to the discharge refrigerant of low-pressure stage compression, then as higher leveled compressor air suction.
Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Magnetic valve（31）Open, middle pressure electric expansion valve (18) is closed；Four-way reversing valve（7）And four-way reversing valve（9）D and c
It is connected, e is connected with s, and main electric expansion valve (17) plays throttling action.
Single stage compress heating circulation：
Magnetic valve（31）Open, middle pressure electric expansion valve (18) is closed；Four-way reversing valve（7）D be connected with e, c is connected with s,
Four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling action.
Two-stage compression refrigeration circulates：
Magnetic valve（31）Close, middle pressure electric expansion valve (18) is opened；Four-way reversing valve（7）D be connected with c, e is connected with s,
Four-way reversing valve（9）D be connected with e, c is connected with s, middle compression swelling valve (18) be responsible for high pressure to it is middle pressure throttling, main expansion valve
（17）It is responsible for high pressure to throttle to low pressure.
Two-stage Compression heating circulation：
Magnetic valve（31）Close, middle pressure electric expansion valve (18) is opened；Four-way reversing valve（7）D be connected with e, c is connected with s,
Four-way reversing valve（9）D be connected with e, c is connected with s, middle compression swelling valve (18) be responsible for high pressure to it is middle pressure throttling, main expansion valve
（17）It is responsible for high pressure to throttle to low pressure.
Embodiment 3
As shown in figure 3, Multifunctional heat pump system includes：High pressure stage compressor（1）, low-pressure stage compressor（2）, main electric expansion valve
(17), middle pressure electric expansion valve (18), four-way reversing valve（7）, four-way reversing valve（9）, charge air cooler（19）, source heat exchanger
（10）, air-conditioning heat exchanger（11）, hot water heat exchanger（12）, multiple check valves（3）, multiple magnetic valves（13、14、15）, reservoir
（16）, gas-liquid separator（4）, oil eliminator（5）, oil return capillary（6）.
Compressor（1）And compressor（2）Muffler pass through check valve（3）It is connected on a return-air house steward；Four-way changes
To valve（9）C pipes on pass through another check valve（3）With high stage compressor（1）Blast pipe be connected, compressor（1）Blast pipe
On be also provided with check valve（3）；Four-way reversing valve（9）E pipe and charge air cooler（19）Import is connected, four-way reversing valve（9）S pipe and
Low-pressure stage compressor（2）Muffler is connected；Four-way reversing valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected；In it is cold
Device（19）There are three imports, one and middle compression swelling valve（18）It is connected, one is connected with condensate line, a four-way reversing valve
（9）E pipe be connected；Charge air cooler（19）Tracheae outlet is connected with high stage compressor muffler, is arranged on check valve (3（1）)
Exit, liquid pipe outlet connection low-pressure stage main expansion valve (17) entrance；Magnetic valve（13）, magnetic valve（14）, magnetic valve（15）Point
Source heat exchanger is not placed in（10）, air-conditioning heat exchanger（11）, hot water heat exchanger（12）Tracheae on；Hot water heat exchanger（12）Gas
Pipe passes through magnetic valve（15）It is connected with hiigh pressure stage blast pipe, air-conditioning heat exchanger（11）With source heat exchanger（10）Pass through magnetic valve
（14、13）Respectively and four-way reversing valve（7）E pipe and c manage be connected；Each heat exchanger liquid pipe passes through multiple check valves（3）It is connected, shape
Into star parallel-connection structure.
Middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure.Four-way
Reversal valve（7）It is responsible for refrigeration（Defrost）Switch with heating, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching.Charge air cooler（19）
Inner refrigerant is evaporated to low-pressure stage compressor（2）Exhaust carry out combination cooling, then as high pressure stage compressor（1）Suction
Gas.Source heat exchanger（10）It is responsible for absorbing from external environment or releases tow taste heat, air-conditioning heat exchanger is responsible for air-conditioned room
Between cold and hot amount is provided, hot water heat exchanger is responsible for heating required hot water.When running single stage compress, each circulation is main expansion valve
(17) throttle；Pass through each magnetic valve and four-way reversing valve（7）Switch control, each two heat exchanger pass through main expansion valve (17) and pressure
Contracting machine forms kind of refrigeration cycle, without passing through other heat exchangers.Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
And four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling action.
Single stage compress heating circulation：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Single stage compress heats water circulation：
Magnetic valve（13）, magnetic valve（15）Open, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Single stage compress freezes+heat water circulation：
Magnetic valve（14）, magnetic valve（15）Open, magnetic valve（13）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with c, e is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Two-stage compression cycle four-way reversing valve（9）D be connected with e,
C is connected with s, and middle compression swelling valve (18), which is opened, is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure.
Charge air cooler（19）Refrigerant in condensate line is subcooled for inner refrigerant evaporation, and to low-pressure stage compressor（2）Exhaust
Combination cooling is carried out, then as high pressure stage compressor（1）Air-breathing.Other Valve controllings and single stage compress control are identical, no
Repeat again.
Embodiment 4
As shown in figure 4, on the basis of Fig. 1, in hot water heat exchanger（12）Four-way reversing valve is set up between hiigh pressure stage blast pipe
（8）.Four-way reversing valve（8）C pipe and hot water heat exchanger（12）Tracheae is connected, d pipe is connected with hiigh pressure stage blast pipe, s pipe with it is low
The muffler arbitrarily downgraded is connected, the closure of e pipes；In cooling heat exchanger（26）Four-way reversing valve is set up between hiigh pressure stage blast pipe
（27）, it is easy to reverse defrost.Four-way reversing valve（27）E pipe and cooling heat exchanger（26）Tracheae is connected, d pipes and hiigh pressure stage exhaust
Pipe is connected, and s pipes are connected with the muffler of low-pressure stage, the closure of c pipes；The outlet of main expansion valve (17) passes through respective one-way valve（3）With
Hot water heat exchanger（12）Liquid pipe be connected；The outlet of main expansion valve (17) passes through respective one-way valve（3）, magnetic valve（25）With cooling
Heat exchanger（26）Liquid pipe be connected.Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）D be connected with c, e is connected with s,
Main electric expansion valve (17) plays throttling action.
Single stage compress heating circulation：
Magnetic valve（13）, magnetic valve（14）Open, magnetic valve（15）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with e, c is connected with s, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）'s
D is connected with c, and e is connected with s, and main electric expansion valve (17) plays throttling action.
Single stage compress heats water circulation：
Magnetic valve（13）, magnetic valve（15）Open, magnetic valve（14）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）D be connected with e, c is connected with s, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）'s
D is connected with c, and e is connected with s, and main electric expansion valve (17) plays throttling action.
Single stage compress cooling circulation：
Magnetic valve（13）, magnetic valve（25）Open, magnetic valve（15）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）D be connected with c, e is connected with s, main
Electric expansion valve (17) plays throttling action.
Single stage compress freezes+heat water circulation：
Magnetic valve（14）, magnetic valve（15）Open, magnetic valve（13）, magnetic valve（25）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）D be connected with c, e is connected with s, main
Electric expansion valve (17) plays throttling action.
Single stage compress water heating+cooling circulation：
Magnetic valve（25）, magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four
Logical reversal valve（7）, four-way reversing valve（8）, four-way reversing valve（9）And four-way reversing valve（27）D be connected with c, e is connected with s, main
Electric expansion valve (17) plays throttling action.
Single stage compress circulation also has heating+cooling, refrigeration+cooling, heating+hot water, heating+hot water+cooling, refrigeration+heat
The combinations such as water+cooling circulate, and repeat no more here.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Two-stage compression cycle four-way reversing valve（9）D be connected with e,
C is connected with s, and middle compression swelling valve (18), which is opened, is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure；
Middle compression swelling valve（18）Refrigerant after throttling is in charge air cooler（19）Interior evaporation, after the refrigerant in condensate line is subcooled
Supply main expansion valve（17）, and to low-pressure stage compressor（2）Exhaust carry out combination cooling, then as high pressure stage compressor
（1）Air-breathing.Other Valve controllings and single stage compress control are identical, repeat no more.
Embodiment 5
As shown in figure 5, on the basis of Fig. 1, hot water heat exchanger（12）It is changed to be serially connected on hiigh pressure stage blast pipe, hot water heat exchanger
（12）Import be connected with hiigh pressure stage blast pipe, outlet and four-way reversing valve（7）D pipe be connected；Cooling heat exchanger（26）With it is swollen
Swollen valve（28）Series connection is on low-pressure stage muffler, magnetic valve（25）It is changed to bypass, in cooling heat exchanger（26）When need not work,
It is bypassed；Due to hot water heat exchanger（12）, cooling heat exchanger（26）Tandem is changed to, therefore cancels magnetic valve（13、
14、15）；Expansion valve（28）Only in cooling heat exchanger（26）Throttling action from during work.Below with the Valve controlling of each circulation and
Flow illustrates.
Single stage compress kind of refrigeration cycle：
Magnetic valve（25）Open, middle pressure electric expansion valve (18), electric expansion valve（28）Close；Four-way reversing valve（7）And four-way
Reversal valve（9）D be connected with c, e is connected with s；Hot water heat exchanger（12）Circulating pump it is out of service；Main electric expansion valve (17)
Play throttling action.
Single stage compress heating circulation：
On the basis of the control of single stage compress kind of refrigeration cycle, four-way reversing valve（7）Switch over, four-way reversing valve（7）D and e
It is connected, c is connected with s.
Single stage compress heats water circulation：
On the basis of the control of single stage compress heating circulation：Hot water heat exchanger（12）Circulating pump open；Air-conditioning uses heat exchanger
（11）Circulating fan or water pump it is out of service.
Single stage compress cooling circulation：
Electric expansion valve（28）Open, main electric expansion valve (17) standard-sized sheet, middle pressure electric expansion valve (18), magnetic valve（25）Close
Close；Four-way reversing valve（7）And four-way reversing valve（9）D be connected with c, e is connected with s；Hot water heat exchanger（12）Circulating pump stop
Only run, air-conditioning uses heat exchanger（11）Circulating fan or water pump it is out of service；Electric expansion valve（28）Play throttling action.
Single stage compress freezes+heat water circulation：
On the basis of the control of single stage compress kind of refrigeration cycle, hot water heat exchanger（12）Circulating pump open, source heat exchanger（10）
Circulating fan or water pump it is out of service.
Single stage compress water heating+cooling circulation：
On the basis of the control of single stage compress cooling circulation, hot water heat exchanger（12）Circulating pump open, source heat exchanger（10）
Circulating fan or water pump it is out of service.
Single stage compress circulation also has heating+cooling, refrigeration+cooling, heating+hot water, heating+hot water+cooling, refrigeration+heat
The combinations such as water+cooling circulate, and repeat no more here.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Two-stage compression cycle four-way reversing valve（9）D be connected with e,
C is connected with s, and middle compression swelling valve (18), which is opened, is responsible for high pressure to middle pressure throttling, main expansion valve（17）Or electric expansion valve（28）It is negative
Blame high pressure to throttle to low pressure, charge air cooler（19）Inner refrigerant is evaporated to low-pressure stage compressor（2）Exhaust carry out combination cooling, and
High pressure stage compressor is used as afterwards（1）Air-breathing.Other Valve controllings and single stage compress control are identical, repeat no more.
Embodiment 6
As shown in fig. 6, Multifunctional heat pump system includes：High pressure stage compressor（1）, low-pressure stage compressor（2）, main electric expansion valve
(17), middle pressure electric expansion valve (18), four-way reversing valve（7）, four-way reversing valve（9）, charge air cooler（19）, source heat exchanger
（10）, air-conditioning heat exchanger（11）, multiple check valves（3）, two oil eliminators（5）And oil return capillary（6）, reservoir（16）.
Compressor（1）And compressor（2）Muffler pass through check valve（3）It is connected on a return-air house steward；Four-way changes
To valve（9）C pipes on pass through another check valve（3）With high stage compressor（1）Blast pipe be connected, compressor（1）Blast pipe
On be also provided with check valve（3）；Four-way reversing valve（9）E pipe and charge air cooler（19）Import is connected, four-way reversing valve（9）S pipe and
Low-pressure stage compressor（2）Muffler is connected；Four-way reversing valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected；In it is cold
Device（19）There are three imports, one is connected with middle compression swelling valve (18), one and reservoir（16）Outlet is connected, and a four-way changes
To valve（9）E pipe be connected；Charge air cooler（19）Tracheae exports and high pressure stage compressor（1）Muffler is connected, liquid pipe outlet connection master
Expansion valve (17) entrance；Air-conditioning heat exchanger（11）With source heat exchanger（10）Tracheae respectively and four-way reversing valve（7）E pipe and
C pipes are connected, air-conditioning heat exchanger（11）, source heat exchanger（10）Liquid pipe pass through respective check valve（3）With reservoir（16）Enter
Mouth is connected；Main expansion valve (17) outlet passes through two check valves（3）Respectively and air-conditioning heat exchanger（11）And source heat exchanger（10）
Liquid pipe be connected, ensure that refrigerant in the flow direction that difference cycles through main expansion valve (17) is always a to b, and ensure reservoir
（16）All the time at expansion valve inlet.
Middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure.Four-way
Reversal valve（7）It is responsible for refrigeration（Defrost）Switch with heating, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching.Middle compression swelling valve
（18）Refrigerant after throttling is in charge air cooler（19）Interior evaporation, main expansion is supplied after the refrigerant in condensate line is subcooled
Valve（17）, then as high pressure stage compressor（1）Air-breathing.Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Middle pressure electric expansion valve (18) is closed；Four-way reversing valve（7）And four-way reversing valve（9）D be connected with c, e is connected with s,
Main electric expansion valve (17) plays throttling action.
Single stage compress heating circulation：
Middle pressure electric expansion valve (18) is closed；Four-way reversing valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）D
It is connected with c, e is connected with s, and main electric expansion valve (17) plays throttling action.
Two-stage compression refrigeration circulates：
Middle pressure electric expansion valve (18) is opened；Four-way reversing valve（7）D be connected with c, e is connected with s, four-way reversing valve（9）'s
D is connected with e, and c is connected with s, and middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to low pressure
Throttling.
Two-stage Compression heating circulation：
Middle pressure electric expansion valve (18) is opened；Four-way reversing valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）'s
D is connected with e, and c is connected with s, and middle compression swelling valve (18) is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to low pressure
Throttling.
Embodiment 7
As shown in fig. 7, this is on the basis of Fig. 3, increases a low-pressure stage compressor (20), increase supporting oil eliminator
（5）With oil return capillary（6）, and check valve is set on each low-pressure stage compressor exhaust pipe（3）；Magnetic valve（13、14、15）
It is retrofitted in the liquid pipe of each heat exchanger, the check valve in corresponding liquid pipe is cancelled.Each compressor capacity sum of low-pressure stage and hiigh pressure stage
Capacity ratio is 2 ~ 3:1, Two-stage Compression is in the range of economical operation.Below with the Valve controlling of each circulation and flow for
It is bright.
Single stage compress kind of refrigeration cycle：
Magnetic valve（13）Open, magnetic valve（14）, magnetic valve（15）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
And four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling action.
Single stage compress heating circulation：
Magnetic valve（14）Open, magnetic valve（13）, magnetic valve（15）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Single stage compress heats water circulation：
Magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with e, c is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Single stage compress freezes+heat water circulation：
Magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18) close；Four-way reversing valve（7）
D be connected with c, e is connected with s, four-way reversing valve（9）D be connected with c, e is connected with s, main electric expansion valve (17) rise throttling
Effect.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Two-stage compression cycle four-way reversing valve（9）D be connected with e,
C is connected with s, and middle compression swelling valve (18), which is opened, is responsible for high pressure to middle pressure throttling, main expansion valve（17）It is responsible for high pressure to throttle to low pressure；
Middle compression swelling valve（18）Refrigerant after throttling is in charge air cooler（19）Interior evaporation, after the refrigerant in condensate line is subcooled
Supply main expansion valve（17）, and to low-pressure stage compressor（2）Exhaust carry out combination cooling, then as high pressure stage compressor
（1）Air-breathing.Other Valve controllings and single stage compress control are identical, repeat no more.
Embodiment 8
As shown in figure 8, this is a three stage compression system, the figure is on the basis of Fig. 3, increases intermediate pressure compressor（21）, phase
Answer throttle expansion valve（23）, corresponding charge air cooler（24）, corresponding four-way reversing valve（22）, supporting oil eliminator（5）With oil return hair
Tubule（6）, magnetic valve（13、14、15）It is retrofitted in the liquid pipe of each heat exchanger, the check valve in corresponding liquid pipe is cancelled.Compressor
（21）Blast pipe pass through check valve（3）, and four-way reversing valve（9）The one-way valved outlet pipe of c pipes is converged, and is connected to four-way
Reversal valve（22）D is managed；Charge air cooler（24）Three imports are respectively and expansion valve（23）Throttling outlet, four-way reversing valve（22）E pipe
It is connected with the liquid pipe of condenser；Charge air cooler（24）Tracheae exports and high stage compressor（1）Muffler is connected, liquid pipe outlet connection
Compression swelling valve (18) and charge air cooler in low one-level（19）Entrance；Check valve is set between the air-breathing of adjacent two-stage compressor（3）.
Middle compression swelling valve (18) is responsible for high pressure and throttling, main expansion valve is pressed into one-level（17）It is responsible for high pressure to throttle to low pressure,
Expansion valve（23）It is responsible for high pressure and throttling is pressed into two level；Four-way reversing valve（7）It is responsible for refrigeration（Defrost）Switch with heating, four-way changes
To valve（9）It is responsible for low-pressure stage compressor（2）With medium pressure grade compressor（21）Single Two-stage Compression switching；Four-way reversing valve（22）It is negative
Blame medium pressure grade compressor（21）And high pressure stage compressor（1）Single Two-stage Compression switching；Charge air cooler（19）Inner refrigerant evaporation pair
Liquid refrigerant before low-pressure stage throttling main expansion valve (17) entrance is subcooled, and to low-pressure stage compressor（2）Exhaust is carried out
Combination cooling, then as medium pressure grade compressor（21）Air-breathing.Charge air cooler（24）Inner refrigerant evaporates centering compression swelling valve
And charge air cooler (18)（19）Liquid refrigerant before co-portal is subcooled, and to medium pressure grade compressor（21）Exhaust is mixed
Cooling is closed, then as high pressure stage compressor（1）Air-breathing.Illustrated below with the Valve controlling and flow of each circulation.
Single stage compress kind of refrigeration cycle：
Magnetic valve（13）Open, magnetic valve（14）, magnetic valve（15）, it is middle pressure electric expansion valve (18), electric expansion valve（25）Close
Close；Four-way reversing valve（7）, four-way reversing valve（9）And four-way reversing valve（23）D be connected with c, e is connected with s, main electronic expansion
Valve (17) plays throttling action.
Single stage compress heating circulation：
Magnetic valve（14）Open, magnetic valve（13）, magnetic valve（15）, it is middle pressure electric expansion valve (18), electric expansion valve（25）Close
Close；Four-way reversing valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）And four-way reversing valve（23）D be connected with c,
E is connected with s, and main electric expansion valve (17) plays throttling action.
Single stage compress heats water circulation：
Magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18), electric expansion valve（25）Close
Close；Four-way reversing valve（7）D be connected with e, c is connected with s, four-way reversing valve（9）And four-way reversing valve（23）D be connected with c,
E is connected with s, and main electric expansion valve (17) plays throttling action.
Single stage compress freezes+heat water circulation：
Magnetic valve（15）Open, magnetic valve（13）, magnetic valve（14）, it is middle pressure electric expansion valve (18), electric expansion valve（25）Close
Close；Four-way reversing valve（7）D be connected with c, e is connected with s, four-way reversing valve（9）And four-way reversing valve（23）D be connected with c,
E is connected with s, and main electric expansion valve (17) plays throttling action.
Two-stage compression cycle：
Respectively circulation is Two-stage Compression with single stage compress circulation difference：Four-way reversing valve（22）Switching, d are connected with e, c and s phases
Even, electric expansion valve（23）Open and be responsible for high pressure and throttled to middle pressure, other Valve controllings and single stage compress control are identical；Main electricity
Sub- expansion valve (17) is responsible for high pressure and throttled to low pressure, compressor（2）And compressor（21）Parallel connection be used as low-pressure stage compressor, in it is cold
Device（24）Refrigerant before expansion valve inlet is subcooled for inner refrigerant evaporation, and the exhaust to low-pressure stage compressor mixes
Cooling is closed, then as high pressure stage compressor（1）Air-breathing.
Three stage compression circulates：
Respectively circulation is the four-way reversing valve on the basis of the control of two-stage compression cycle to three stage compression（22）Switching, d are connected with e, c
It is connected with s, middle pressure electric expansion valve (18) opens responsible high pressure and throttling, other Valve controlling and Two-stage Compression controls are pressed into one-level
Make identical；Main electric expansion valve (17) is responsible for high pressure and throttled to low pressure, electric expansion valve（23）It is responsible for high pressure and section is pressed into two level
Stream, charge air cooler（19）Liquid refrigerant before low-pressure stage throttling main expansion valve (17) entrance is subcooled for inner refrigerant evaporation,
And to low-pressure stage compressor（2）Exhaust carries out combination cooling, then as medium pressure grade compressor（21）Air-breathing.Charge air cooler（24）
Inner refrigerant evaporation centering compression swelling valve (18) and charge air cooler（19）Liquid refrigerant before co-portal is subcooled, and centering
Arbitrarily downgrade compressor（21）Exhaust carries out combination cooling, then as high pressure stage compressor（1）Air-breathing.
Compressor in the various embodiments described above can be frequency-changeable compressor or variable conpacitance compressor, when multi-stage compression is run,
Rotating speed and capacity are adjusted according to intermediate pressure and environment temperature automatically, it is 2 ~ 3 to make high and low pressure level capacity ratio:1, operation warp
Ji.
Middle pressure throttle expansion valve in above-described embodiment 1,3,4,5,6,7,8（18）When single stage compress circulates, can also open
Open and throttled, the refrigerant before main expansion valve (17) entrance that throttled to low pressure is subcooled.
Claims (14)
1. a kind of single multi-stage compression automatic conversion multifunctional heat pump device, it is characterized in that：At least two compressors：Hiigh pressure stage pressure
Contracting machine（1）With low-pressure stage compressor（2）；At least two expansion valves：Main expansion valve（17）With middle compression swelling valve（18）, main expansion
Valve（17）It is responsible for throttling from high pressure to low pressure, middle compression swelling valve（18）It is responsible for from high pressure to middle pressure throttling；At least two four-ways
Reversal valve：Four-way reversing valve（7）And four-way reversing valve（9）, wherein four-way reversing valve（7）It is responsible for refrigeration（Defrost）Cut with heating
Change, four-way reversing valve（9）It is responsible for the single Two-stage Compression of switching；At least two heat exchangers, one of them is source heat exchanger（10）,
Other is using side heat exchanger, such as：Air-conditioning heat exchanger（11）, hot water heat exchanger（12）, cooling heat exchanger（26）.
2. according to claim 1, it is characterized in that：Check valve is set between the air-breathing of adjacent two-stage compressor（3（1））；
Four-way reversing valve（9）C pipes on pass through check valve（3(2)）With high stage compressor（1）Blast pipe be connected, compressor（1）Row
Check valve is also provided with tracheae（3（3））；Four-way reversing valve（9）E pipe and charge air cooler（19）Import is connected, or directly and high by one
Level compressor（1）Air intake duct be connected；Four-way reversing valve（9）S pipe and low-pressure stage compressor（2）Muffler is connected；Four-way changes
To valve（9）D pipe and low-pressure stage compressor（2）Blast pipe is connected.
3. according to claim 1,2, in middle compression swelling valve（18）Throttling outlet sets charge air cooler（19）, it is characterized in that：In
Cooler（19）There are three imports, one and middle compression swelling valve（18）It is connected, one is connected with condensate line, a four-way reversing valve
（9）E pipe be connected；Charge air cooler（19）Tracheae outlet is connected with high stage compressor muffler, is arranged on check valve (3（1）)
Exit, liquid pipe outlet connection main expansion valve（17）Entrance；Middle compression swelling valve（18）Refrigerant after throttling is in charge air cooler（19）
Interior evaporation, main expansion valve is supplied after the refrigerant in condensate line is subcooled（17）, and to the refrigerant of low one stage of compression
Exhaust carries out combination cooling, then as higher leveled compressor air suction.
4. according to claim 1,2, in middle compression swelling valve（18）Throttling outlet sets charge air cooler（19）, in compressors at different levels
Regenerator is set on muffler（29）And regenerator（30）, compressor return airs at different levels are overheated, while to corresponding at different levels swollen
Refrigerant is subcooled before swollen valve, it is characterized in that：Charge air cooler（19）There are two imports, one and middle compression swelling valve（18）Throttle out
Mouth is connected, a four-way reversing valve（9）E pipe be connected, charge air cooler（19）The refrigeration of the refrigerant of interior evaporation and low one stage of compression
Agent exhaust carries out combination cooling；Charge air cooler（19）Liquid refrigerant outlet pass through check valve（3）And regenerator（29）It is connected, liquid
State refrigerant is in regenerator（29）Main expansion valve is supplied after interior supercooling（17）；Gaseous refrigerant exports and regenerator（30）It is connected,
Into regenerator（30）After overheat, as higher leveled compressor air suction；In regenerator（29）And regenerator（30）Feed tube
Between bypass solenoid valve is set（31）.
5. according to claim 1,2,3,4, each heat exchanger passes through main expansion valve（17）Star parallel-connection structure can be formed, it is special
Levy and be：Air-conditioning heat exchanger（11）, source heat exchanger（10）, hot water heat exchanger（12）, cooling heat exchanger（26）Four heat exchangers
Liquid pipe is connected by multiple magnetic valves (13,14,15,25)；Hot water heat exchanger（12）Tracheae directly and hiigh pressure stage blast pipe phase
Even, cooling heat exchanger（26）Directly it is connected with low-pressure stage muffler；Air-conditioning heat exchanger（11）With source heat exchanger（10）Respectively and
Four-way reversing valve（7）E pipe and c manage be connected；Pass through each magnetic valve and four-way reversing valve（7）Switch control, each two heat exchanger
Pass through main expansion valve（17）Kind of refrigeration cycle is formed with compressor, without passing through other heat exchangers.
6. according to claim 1,2,3,4,5, magnetic valve is arranged at the tracheae of each heat exchanger, such as magnetic valve（13）, electricity
Magnet valve（14）, magnetic valve（15）It is respectively placed in source heat exchanger（10）, air-conditioning heat exchanger（11）, hot water heat exchanger（12）Tracheae
On, each heat exchanger liquid pipe passes through multiple check valves（3）It is connected.
7. according to claim 1,2,3,4,5,6, in hot water heat exchanger（12）Four-way is set between hiigh pressure stage blast pipe
Reversal valve（8）, it is characterized in that：Four-way reversing valve（8）C pipe and hot water heat exchanger（12）Tracheae is connected, d pipes and hiigh pressure stage exhaust
Pipe is connected, and s pipes are connected with the muffler of low-pressure stage, the closure of e pipes；Main expansion valve（17）Outlet pass through check valve（3（4））And heat
Water- to-water heat exchanger（12）Liquid pipe be connected.
8. according to claim 1,2,3,4,5,6,7, in cooling heat exchanger（26）Four are set between hiigh pressure stage blast pipe
Logical reversal valve（27）, it is easy to reverse defrost, it is characterized in that：Four-way reversing valve（27）E pipe and cooling heat exchanger（26）Tracheae phase
Even, d pipes are connected with hiigh pressure stage blast pipe, and s pipes are connected with the muffler of low-pressure stage, the closure of c pipes；Main expansion valve（17）Outlet lead to
Cross check valve（3（5））, magnetic valve（25）With cooling heat exchanger（26）Liquid pipe be connected.
9. according to claim 1,2,3,4, hot water heat exchanger（12）It is arranged at four-way reversing valve（7）With hiigh pressure stage blast pipe
Between, hot water heat exchanger（12）Import be connected with hiigh pressure stage blast pipe, outlet and four-way reversing valve（7）D pipe be connected.
10. according to claim 1,2,3,4,9, cooling heat exchanger（26）And expansion valve（28）After series connection, and magnetic valve
（25）Parallel connection, loaded on low-pressure stage muffler；In cooling heat exchanger（26）When need not work, magnetic valve（25）Side is carried out to it
It is logical.
11. according to claim 1 to 10, multiple compressors, including compressor can be set in low-pressure stage（2）And compressor
(20), and in each compressor exhaust pipe check valve is set（3）.
12. according to claim 1 to 11, three stage compression system increase intermediate pressure compressor（21）, corresponding throttle expansion valve
（23）, corresponding charge air cooler（24）, corresponding four-way reversing valve（22）, it is characterized in that：Compressor（21）Blast pipe pass through check valve
（3（6））, and four-way reversing valve（9）The one-way valved outlet pipe of c pipes is converged, and is connected to four-way reversing valve（22）D is managed；In it is cold
Device（24）Three imports are respectively and expansion valve（23）Throttling outlet, four-way reversing valve（22）E pipe be connected with the liquid pipe of condenser；
Charge air cooler（24）Tracheae exports and high stage compressor（1）Muffler is connected, and liquid pipe outlet connects low one-stage expansion valve（18）With
Charge air cooler（19）Entrance；Check valve is set between the air-breathing of adjacent two-stage compressor（3（3））.
13. according to claim 1 to 12, increase oil eliminator in the blast pipe of compressor（5）With oil return capillary（6）,
Increase gas-liquid separator on the air intake duct of compressor（4）, increase reservoir before expansion valve（16）.
14. according to claim 1 to 13, compressors at different levels can be frequency-changeable compressor, variable conpacitance compressor, according to intermediate pressure
Rotating speed and capacity is adjusted in power and environment temperature automatically；Expansion valve（17、18、23、28）Can be heating power expansion valve, electronic expansion
Valve or capillary；Expansion valve（18、23、28）, need to be in expansion valve inlet or outlet series electrical for heating power expansion valve or capillary
Magnet valve；Double fluid can use single current to be substituted to magnetic valve and check valve are in parallel to magnetic valve (13,14).
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| CN110044093A (en) * | 2019-03-12 | 2019-07-23 | 天津大学 | Two-stage Compression second vapor injection CO2Three-level backheat chiller-heat pump/refrigeration system |
| CN112013566A (en) * | 2019-06-01 | 2020-12-01 | 上海春至新能源科技有限公司 | Energy-integrated energy-saving multifunctional heat pump |
| CN114183862A (en) * | 2021-12-21 | 2022-03-15 | 宁波奥克斯电气股份有限公司 | Air conditioning system with single-stage compression switching function and double-stage compression switching control method |
| CN116044727A (en) * | 2022-12-07 | 2023-05-02 | 清华大学 | Adsorption compressor capable of switching compression mode and low-temperature refrigerator |
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Application publication date: 20171226 |