CN106196721A - A kind of spray enthalpy compressor air-conditioning system and control method thereof - Google Patents
A kind of spray enthalpy compressor air-conditioning system and control method thereof Download PDFInfo
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- CN106196721A CN106196721A CN201610525415.XA CN201610525415A CN106196721A CN 106196721 A CN106196721 A CN 106196721A CN 201610525415 A CN201610525415 A CN 201610525415A CN 106196721 A CN106196721 A CN 106196721A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B40/02—Subcoolers
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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
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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
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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
- F25B2500/00—Problems to be solved
- F25B2500/07—Exceeding a certain pressure value in a refrigeration component or cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
Abstract
The present invention provides a kind of spray enthalpy compressor air-conditioning system and control method thereof, it includes compressor (1), outdoor heat exchanger (2), indoor heat exchanger, and it is arranged on the enthalpy-increasing device between described outdoor heat exchanger (2) and described indoor heat exchanger, described enthalpy-increasing device includes supercooling apparatus (3) and the first control valve (4), also including that one end is connected to described compressor (1), the other end is connected to spray enthalpy pipeline (5) of described enthalpy-increasing device outlet side, on described spray enthalpy pipeline, (5) are provided with the second control valve (6).The control of two-stage spray enthalpy loine pressure it is capable of by the present invention, can efficiently and precisely control to spray the spray enthalpy pressure of enthalpy compressor air-conditioning system, superfeed pressure is being controlled as much as possible near optimum superfeed pressure point, ensure that compressor is in full compression state as far as possible, avoid because of the too high or too low overcompression causing compressor of superfeed pressure and under-voltage contracting, thus improve heating capacity and the efficiency of spray enthalpy compressor air-conditioning system.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of spray enthalpy compressor air-conditioning system and control method thereof.
Background technology
The patent of Patent No. CN103822418A of the prior art disclose a kind of quasi-secondary compression heat pump system and
Its control method, but this control method is to utilize the degree of superheat to be controlled spray enthalpy pressure, and to spray enthalpy Stress control
The most accurate.
Owing to spray enthalpy superfeed pressure cannot be controlled or control inaccuracy thus cause by air-conditioner of the prior art
The too high or too low overcompression causing compressor of superfeed pressure and under-voltage contracting, and reduce the technology such as efficiency and the heating capacity of system
Problem, research design the most of the present invention goes out a kind of spray enthalpy compressor air-conditioning system and control method thereof.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome air conditioning system of the prior art energy during spray enthalpy
The defect that effect reduces, thus a kind of spray enthalpy compressor air-conditioning system and control method thereof are provided.
The present invention provides a kind of spray enthalpy compressor air-conditioning system, and it includes compressor, outdoor heat exchanger, indoor heat exchanger,
And it being arranged on the enthalpy-increasing device between described outdoor heat exchanger and described indoor heat exchanger, described enthalpy-increasing device included cold charge
Put and the first control valve, also include that one end is connected to described compressor, the other end is connected to the spray enthalpy pipe of described enthalpy-increasing device outlet side
Road, described spray enthalpy pipeline is provided with the second control valve.
Preferably, described first control valve is supercool electromagnetic expanding valve, and/or, described second control valve is porous unsteady flow
Amount electromagnetic valve.
Preferably, when described second control valve is porous variable flow electromagnetic valve, described porous variable flow electromagnetic valve includes
Price fixing and matched Moving plate, described Moving plate is rotatably to control to flow through the flow generation change of this porous variable flow electromagnetic valve
Change.
Preferably, described price fixing is disc structure, and offers the opening excessively of at least one thereon, and described Moving plate is
The sector structure that radius is equal with the price fixing radius of described disc structure.
Preferably, described compressor air entry end also branch be provided with a branch road, the other end of this branch road is connected to
In line segments between described porous flow solenoid valve and described supercooling apparatus, and it is additionally provided with electromagnetic valve on this branch road.
Preferably, at exhaust outlet of compressor, it is additionally provided with back pressure transducer, also sets up at compressor air suction mouth
There is inspiratory pressure sensor；Described spray enthalpy pipeline is additionally provided with spray enthalpy pressure transducer.
Preferably, described spray enthalpy pipeline is additionally provided with and only allows coolant to flow to the check valve of described compressor.
The present invention also provides for a kind of control method spraying enthalpy compressor air-conditioning system, and it uses aforesaid spray enthalpy compressor empty
Adjusting system, is controlled its spray enthalpy process.
Preferably, when cooling system runs: and when system includes that electromagnetic valve, described first control valve are that supercool electromagnetism is swollen
When swollen valve, the second control valve are porous variable flow electromagnetic valve,
Supercool electromagnetic expanding valve controls logic according to system degree of supercooling and is controlled, and electromagnetic valve is opened, and regulates porous unsteady flow
Amount electromagnetic valve Moving plate makes all flowing holes be in closed state.
Preferably, when system heating operation, and when system includes that electromagnetic valve, described first control valve are that supercool electromagnetism is swollen
When swollen valve, the second control valve are porous variable flow electromagnetic valve:
If when system is in the heating operation starting stage, regulate supercool electric expansion valve and electromagnetic valve is in cutting out shape
State, system does not carry out spraying enthalpy action；
If when system heating operation is in stable operation stage, detecting pressure at expulsion and the pressure of inspiration(Pi) of now system, taking
The intermediate value of the two is that target sprays enthalpy force value, opens supercool electric expansion valve, and regulation porous variable flow electromagnetic valve is to standard-sized sheet.
Preferably, set when after compressor operating frequency 5min, its rate of change is below 5%, then it reaches aforementioned stable fortune
Row order section；The initial opening of supercool electric expansion valve is 250PLS, and aperture during its standard-sized sheet is 480PLS.
Preferably, after maintaining supercool electric expansion valve initial opening the first Preset Time, detection spray enthalpy pressure, draw and mesh
The difference of mark spray enthalpy force value:
If difference is just, the most supercool electric expansion valve is preset aperture pace of change with first and is turned down；
If difference is negative, the most supercool electric expansion valve is preset aperture pace of change with second and is carried out out greatly.
Preferably, carry out after aperture change adjusts again through the second Preset Time, detection current spray enthalpy pressure and mesh every time
Mark spray enthalpy pressure difference value, regulates control further according to the magnitude range of difference.
Preferably, if difference≤0 and difference/target spray enthalpy pressure >=-10%, the most supercool electric expansion valve keeps current step
Number, porous variable flow electromagnetic valve is shown in a fully open operation；
If difference=0, porous variable flow electromagnetic valve keeps full-gear；
If difference ＞ 0, porous variable flow electromagnetic valve carries out changes in flow rate control, is separately turned on 2/3,1/3, two states
Each the 3rd Preset Time that maintains, detection pressure difference value now, the aperture taking pressure difference value minimum remains on.
A kind of spray enthalpy compressor air-conditioning system and control method thereof that the present invention provides have the advantages that
1., by spray enthalpy compressor air-conditioning system and the control method thereof of the present invention, use two-step evolution spray enthalpy loine pressure
Device and two-step evolution method, it is possible to efficiently and precisely control spray enthalpy compressor air-conditioning system spray enthalpy pressure, as far as possible
Ensure that compressor is in full compression state, it is to avoid because the too high or too low overcompression causing compressor of superfeed pressure and under-voltage
Contracting, thus improve heating capacity and the efficiency of spray enthalpy compressor air-conditioning system；
2. by spray enthalpy compressor air-conditioning system and the control method thereof of the present invention, relative to original not to spray enthalpy QI invigorating
The efficiency of the air conditioning system that pressure is controlled can promote about 10%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the spray enthalpy compressor air-conditioning system of the present invention；
Fig. 2 is the structural representation of the porous variable flow electromagnetic valve of the spray enthalpy compressor air-conditioning system of the present invention；
Wherein, 2 (a) is the schematic arrangement figure of its flowing hole standard-sized sheet；2 (b) is the schematic arrangement that its flowing hole opens 2/3
Figure；2 (c) is the schematic arrangement figure that its flowing hole opens 1/3；2 (d) is the schematic arrangement figure that its flowing hole is fully closed.
In figure, reference is expressed as:
1 compressor, 2 outdoor heat exchangers, 3 supercooling apparatus, 4 first control valves, 5 spray enthalpy pipelines, 6 second
Control valve, 61 price fixings, 611 mistake openings, 62 Moving plates, 7 branch roads, 8 electromagnetic valves, 9 back pressure transducers,
10 inspiratory pressure sensors, 11 spray enthalpy pressure transducers, 12 check valves.
Detailed description of the invention
As it is shown in figure 1, the present invention provides a kind of spray enthalpy compressor air-conditioning system that can improve efficiency, it include compressor 1,
Outdoor heat exchanger 2, indoor heat exchanger, and the increasing enthalpy dress being arranged between described outdoor heat exchanger 2 and described indoor heat exchanger
Put, described enthalpy-increasing device include supercooling apparatus 3 and for control to enter this supercooling apparatus be heated pipeline section leading portion flow and
First control valve 4 of pressure, also includes that one end is connected to described compressor 1, the other end is connected to the spray of described enthalpy-increasing device outlet side
Enthalpy pipeline 5, on described spray enthalpy pipeline, 5 are provided with for controlling flow and the second control valve 6 of pressure in this pipeline.
By the spray enthalpy compressor air-conditioning system of the present invention, utilize the first control valve and the second control being arranged at above-mentioned position
The control mode that valve processed combines, it is possible to realize the control of two-stage spray enthalpy loine pressure, it is possible to efficiently and precisely control spray enthalpy
The spray enthalpy pressure of compressor air-conditioning system, is controlling near optimum superfeed pressure point, as far as possible by superfeed pressure as much as possible
Ensure that compressor is in full compression state, it is to avoid because the too high or too low overcompression causing compressor of superfeed pressure and under-voltage
Contracting, thus improve heating capacity and the efficiency of spray enthalpy compressor air-conditioning system.By the spray enthalpy compressor air-conditioning system of the present invention
And control method, the efficiency of the air conditioning system that spray enthalpy superfeed pressure is controlled can not be promoted about relative to original
10%.
Preferably, described first control valve 4 is supercool electromagnetic expanding valve, and/or, described second control valve 6 becomes for porous
Flow solenoid valve.This is the preferred kind of difference and the version of two control valves, and the first control valve is chosen as supercool electricity
Magnetic expansion valve, it is possible to regulation flows through the uninterrupted of the coolant of the low pressure pipeline section in the supercooling apparatus of enthalpy-increasing device and suitably
When it is opened or closes, it is possible to spray enthalpy pressure is played very well, is accurately controlled, the second control valve is chosen as porous
Variable flow electromagnetic valve, this be also a kind of by control aperture and control uninterrupted and standard-sized sheet or the kind of fully closed preferred valve
Class, it is possible to utilize multiple holes of offering on electromagnetic valve and to the plurality of hole suitable when control it and open or close, thus play
Control efficiently and accurately to this road cold medium flux.
As shown in Figure 2, it is preferable that described porous variable flow electromagnetic valve includes price fixing 61 and matched Moving plate 62,
Described Moving plate 62 is rotatably to control to flow through the flow generation change of this porous variable flow electromagnetic valve.This is porous variable flow electromagnetic
The preferred constructive form of valve, by the coupling between price fixing and rotating Moving plate, can according to practical situation need rotate
Moving plate is to suitable position, to realize the purpose of the change of accurate flow control size.
Preferably, described price fixing 61 is disc structure, and offers the opening 611 excessively of at least one thereon, described
Moving plate 62 is the sector structure that radius is equal with price fixing 61 radius of described disc structure.It is set on being provided with circulation by price fixing
The version of the disk in hole, it is possible to via this cross opening allow coolant pass therethrough, and by Moving plate is set to
The sector structure that price fixing radius is equal, can circulate to crossing on price fixing by rotating the Moving plate of this sector structure effectively
Hole carries out blocking or cancelling blocking, thus realizes the accurate control of flow.
Preferably, equal sized by described opening 611 excessively 3, can be blocked successively by the rotation of described Moving plate 62
Or cancel block 3 this cross opening 611.This was the preferred number of opening, and realized flow by Moving plate and accurately control
The detailed description of the invention of system.
Preferably, described compressor 1 air entry end also branch be provided with a branch road 7, the other end of this branch road 7 is even
To the line segments between described porous flow solenoid valve 6 and described supercooling apparatus 3, and it is additionally provided with control on this branch road 7
Coolant circulation or the electromagnetic valve 8 of disconnection in this branch road 7.By this branch road and the electromagnetic valve being arranged on this branch road, it is possible to this
The spray enthalpy process of spray enthalpy compressor air-conditioning system plays the effect of assist control regulation, when this electromagnetic valve is opened so that spray enthalpy
Coolant in pipeline flows into compressor air suction mouth via this branch road, and does not enter spray enthalpy mouth, so that system does not spray enthalpy, works as electricity
When magnet valve is closed, system the most effectively sprays enthalpy effect.
Preferably, at exhaust outlet of compressor, it is additionally provided with back pressure transducer 9, also sets up at compressor air suction mouth
There is inspiratory pressure sensor 10；Described spray enthalpy pipeline 5 is additionally provided with spray enthalpy pressure transducer 11.By at above-mentioned not coordination
Install the mode of pressure transducer, it is possible to detect the pressure at expulsion of compressor, pressure of inspiration(Pi) detects and sprays enthalpy
Pressure detects such that it is able to the optimum pressure that compressor sprays enthalpy QI invigorating calculates and draws, i.e. obtains target spray
Enthalpy pressure, and then again by the actual spray enthalpy pressure detected, compare with target spray enthalpy pressure, thus control actual spray enthalpy
The numerical value of pressure reaches the vicinity of target spray enthalpy force value, effectively ensures that compressor is in full compression state, finally improves system
The efficiency of system.
Preferably, described spray enthalpy pipeline 5 is additionally provided with and only allows coolant to flow to the check valve 12 of described compressor 1.
The version of above-mentioned check valve is set in above-mentioned position, it is possible to is effectively prevented spray enthalpy coolant and enters spray enthalpy from compressor refluence
Pipeline affects the generation of the situation of whole system performance and efficiency.
The present invention also provides for a kind of control method spraying enthalpy compressor air-conditioning system, and it uses aforesaid spray enthalpy compressor empty
Adjusting system, is controlled its spray enthalpy process.By the control method of the spray enthalpy compressor air-conditioning system of the present invention, use aforementioned
Spray enthalpy compressor air-conditioning system, it is possible to utilize and be arranged at the first control valve of above-mentioned position and control that the second control valve combines
Mode, it is possible to realize the control of two-stage spray enthalpy loine pressure, it is possible to efficiently and precisely control spray enthalpy compressor air-conditioning system
Spray enthalpy pressure, is controlling as much as possible near optimum superfeed pressure point by superfeed pressure, is ensureing that compressor is in as far as possible
Full compression state, it is to avoid because the too high or too low overcompression causing compressor of superfeed pressure and under-voltage contracting, thus improve spray enthalpy
The heating capacity of compressor air-conditioning system and efficiency.By the control method of the spray enthalpy compressor air-conditioning system of the present invention, relatively
The efficiency of the air conditioning system that spray enthalpy superfeed pressure is controlled can not be promoted about 10% in original.
Preferably, when cooling system runs: and when system includes that electromagnetic valve, described first control valve are that supercool electromagnetism is swollen
When swollen valve, the second valve are porous variable flow electromagnetic valve,
Supercool electromagnetic expanding valve controls logic according to system degree of supercooling, and (degree of supercooling controls logic and refers to: at machine system be
Time under refrigerating state, degree of supercooling controls purpose and is that the coolant ensureing to flow to indoor heat exchanger after outdoor heat exchanger is liquid
State, main control parameters is condensing pressure and coolant subcooler outlet temperature.When system is heating mode, degree of supercooling controls purpose
It is then for gaseous coolant is pressed in system spray enthalpy offer) it is controlled, electromagnetic valve is opened, and regulation porous variable flow electromagnetic valve actuation dish makes
Obtain all flowing holes and be in closed state (as shown in accompanying drawing 2 (d)).I.e. refrigeration operational state is not carried out spraying enthalpy QI invigorating action.
This is that the spray enthalpy compressor assembly of the present invention is under refrigeration operational state, it is not necessary to perform the tool of spray enthalpy QI invigorating action
The control mode of body, by controlling, electromagnetic valve is opened, porous variable flow electromagnetic valve closure electromagnetic expanding valve obstructed, supercool is according to often
Rule degree of supercooling controls logic and runs, thus enthalpy pipeline is obstructed, do not carry out spraying purpose and the effect of the action of enthalpy to realize spray.
Preferably, when system heating operation, and when system includes that electromagnetic valve, described first control valve are that supercool electromagnetism is swollen
When swollen valve, the second control valve are porous variable flow electromagnetic valve:
If when system is in the heating operation starting stage, regulate supercool electric expansion valve and electromagnetic valve is in cutting out shape
State, system does not carry out spraying enthalpy action；Due to system, to heat starting stage various state the most unstable, if the most rashly carrying out spraying enthalpy
If may affect system and run the parameters value in uphill process, affect the properly functioning of system.
If when system heating operation is in relative stable operation stage, detecting pressure at expulsion and the pressure of inspiration(Pi) of now system
Power, the intermediate value taking the two is that target sprays enthalpy force value, opens supercool electric expansion valve, and regulation porous variable flow electromagnetic valve is to entirely
Open.When system heating operation is in steady statue, it is that target is sprayed by taking the intermediate value of both system exhaust and pressure of inspiration(Pi)
Enthalpy force value, this is preferred value and the selection mode of a kind of target spray enthalpy force value, and this is through great many of experiments and concrete behaviour
Make process and draw, now open supercool electric expansion valve, regulation porous variable flow electromagnetic valve to standard-sized sheet, it is possible to system is entered
The initial procedure entering steady statue carries out spraying enthalpy effect and regulation control.
Preferably, set when after compressor operating frequency 5min, its rate of change is below 5%, then it reaches aforementioned stable fortune
Row order section；The initial opening of supercool electric expansion valve is 250PLS, and aperture during its standard-sized sheet is 480PLS.This is that system reaches steady
Determine the concrete determination methods of operation phase, can be changed according to actual needs, and initially the opening of supercool electric expansion valve
Degree and standard-sized sheet aperture be above-mentioned numerical value be also commonly used in the art and preferred electric expansion valve kind and version.
Preferably, maintain after supercool electric expansion valve initial opening the first Preset Time (preferably 3min), by spray enthalpy
Pipe pressure sensor detection spray enthalpy pressure, draws and the difference of target spray enthalpy force value:
If difference is just, the most supercool electric expansion valve is preset aperture pace of change (preferably 15pls/min) with first and is entered
Row turns down；
If difference is negative, the most supercool electric expansion valve is preset aperture pace of change (preferably 15pls/min) with second and is entered
Row is opened big.
This is after system runs the first Preset Time, by detection spray enthalpy pressure in real time and carries out with target spray enthalpy force value
The concrete operations mode being relatively adjusted, when difference is timing, illustrates now actual spray enthalpy pressure ratio target spray enthalpy pressure
Greatly, then need to reduce actual spray enthalpy pressure, then regulate supercool electric expansion valve and preset aperture pace of change with first and close
Little, thus reduce the purpose of above-mentioned actual spray enthalpy pressure；When difference is for time negative, now actual spray enthalpy pressure ratio target is described
Spray enthalpy pressure is little, then need to increase actual spray enthalpy pressure, then regulates supercool electric expansion valve and presets aperture change speed with second
Degree carries out out big, thus reaches to improve the purpose of above-mentioned actual spray enthalpy pressure.
Preferably, described first Preset Time is 3min, and first presets aperture pace of change presets aperture change with second
Speed is equal, be 15pls/min.This is first Preset Time of the present invention, first and second presets aperture pace of change
Preferably value, this draws have preferable versatility and practicality according to substantial amounts of research and experimental data, and above-mentioned
Numerical value can be changed according to the needs of practical situation.
Preferably, carry out again through the second Preset Time (preferably 1min) after aperture change adjusts, the current spray of detection every time
Enthalpy pressure and target spray enthalpy pressure difference value, regulate control further according to the magnitude range of difference.This is at supercool electronics
After the first order spray pressure controlled action of enthalpy of expansion valve, then by supercool electric expansion valve and porous variable flow electromagnetic valve pair
The control action of second level pressure that spray enthalpy pressure is carried out, i.e. controlled to adjust when the first order or during miss the mark value, all
The effect that can be regulated accurately by second level control.
Preferably, if difference≤0 and difference/target spray enthalpy pressure >=-10%, the most supercool electric expansion valve keeps current step
Number, porous variable flow electromagnetic valve is shown in a fully open operation, whole during porous variable flow electromagnetic valve be shown in a fully open operation (if supercool
During device electric expansion valve 480PLS, difference is still negative, then keep current aperture state to run)；Difference≤0 and difference/
Target spray this condition stub of enthalpy pressure >=-10%, although difference is less than 0, but the target spray enthalpy pressure more than-0.1 times,
Further illustrate difference and be positioned at a less negative range, so without changing the step number of cooling electronic expansion valve, protecting simultaneously
Holding the state of porous flow solenoid valve, to be positioned at standard-sized sheet constant, allows supercool electric expansion valve and porous variable flow electromagnetic valve be unlikely to
Fast carrying out changes, and the transition of setting is interval so that spray enthalpy pipeline maintains the controlled state of the first order to reach goal pressure, permissible
What effective safeguards system was run stablizes；The transition interval so arranged can effectively prevent subcooler electric expansion valve with many
Hole variable flow electromagnetic valve action the most frequently, it is ensured that the stability that system is run.
If difference=0, porous variable flow electromagnetic valve keeps full-gear；Show that currently spraying enthalpy pressure has reached target spray
Enthalpy force value, it is therefore desirable to maintain this step number of refrigeration expansion valve and holding porous flow solenoid valve to be shown in a fully open operation and just can
All the time maintaining the state of this difference=0, porous variable flow electromagnetic valve to be initially full-gear, the regulation to spray enthalpy pressure is the most logical
Supercool electric expansion valve is adjusted, and is adjusted by porous variable flow electromagnetic valve if desired value can not be reached again；
If difference ＞ 0, porous variable flow electromagnetic valve carries out changes in flow rate control, is separately turned on 2/3,1/3, two states
Each the 3rd Preset Time that maintains, detection pressure difference value now, the aperture taking pressure difference value minimum remains on.If difference is more than
0, then explanation current spray enthalpy pressure ＞ target pressure value, then need the aperture by reducing porous variable flow electromagnetic valve to reduce stream
Amount, thus reduce current spray enthalpy force value to level off to target pressure value.
Preferably, described second Preset Time is 1min, and described 3rd Preset Time is 3min.Above-mentioned second Preset Time
Also being preferred value with the 3rd Preset Time, this also draws according to substantial amounts of research and experimental data, has preferably
Versatility and practicality, and above-mentioned numerical value can be changed according to the needs of practical situation.
Operation principle and the preferred embodiment of the present invention are described below
As shown in Figure 1, the control system device of this programme is made up of the present invention following components and parts: inspiratory pressure sensor
10, back pressure transducer 9, spray enthalpy pressure transducer the 11, first control valve 4 (supercool electric expansion valve), electromagnetic valve 8, second
Control valve 6 (porous variable flow electromagnetic valve), capillary tube, outdoor temperature sensor.Porous variable flow electromagnetic valve its be respectively standard-sized sheet,
Open 2/3, open 1/3, fully closed schematic arrangement figure, porous variable flow electromagnetic valve is made up of price fixing 61 and Moving plate 62, sectorial area be
Moving plate, have 3 cross openings 611 for price fixing 61, Moving plate 62 is moved by electromagnetic pulse, and its initial position is 0PLS.
Control method: through experimental verification, spray enthalpy compressor assembly promotes little for efficiency during refrigerating operaton, Er Qie
Refrigerating operaton can cause the scarce capacity of system so that compressor raising frequency because of having bypassed part coolant on the contrary, reduce and be
The efficiency of system.
Refrigerating operaton: in refrigerating operaton, supercooling apparatus electromagnetic valve controls logic according to system degree of supercooling and is controlled, electromagnetism
Valve is opened, and shown in porous variable flow electromagnetic valve actuation dish such as accompanying drawing 2 (d), all flowing holes are in closed state.I.e. refrigerating operaton shape
State is not carried out spray enthalpy QI invigorating action.
Heating operation: heating operation starting stage, supercool electric expansion valve and electromagnetic valve be in closed mode, and system is not
Carry out spraying enthalpy action.System is in relative stable operation stage (compressor operating frequency 5min rate of change less than 5%), detects this
Time the pressure at expulsion of system and pressure of inspiration(Pi), the intermediate value taking the two is that target sprays enthalpy force value, and supercool electric expansion valve is opened
(initial opening 250PLS, standard-sized sheet step number 480PLS), porous variable flow electromagnetic valve is shown in a fully open operation；At the beginning of supercool electric expansion valve
Beginning aperture maintains 3min, by spray enthalpy pipe pressure sensor detection spray enthalpy pressure, draws and the difference of target spray enthalpy force value, as
Really difference is just, then supercooling apparatus electric expansion valve turns down with 15pls/min, if difference is negative, then and supercooling apparatus electricity
Sub-expansion valve carries out out greatly with 15pls/min, carries out 1min detection current spray enthalpy pressure and target after aperture change adjusts every time
Spray enthalpy pressure difference value, if difference≤0 and difference/target spray enthalpy pressure >=-10%, then supercooling apparatus electric expansion valve keeps current
Step number, whole during porous variable flow electromagnetic valve be shown in a fully open operation (if during supercooling apparatus electric expansion valve 480PLS, difference
Just it is still, then keeps current aperture state to run).If difference=0, porous variable flow electromagnetic valve keeps full-gear；If
Difference ＜ 0 then porous variable flow electromagnetic valve carries out changes in flow rate control, is separately turned on 2/3,1/3, and two states respectively maintains 3min,
Detection pressure difference value now, the aperture taking pressure difference value minimum remains on.
3., in whole control device, spray enthalpy Stress control is played main Accommodation by supercooling apparatus electric expansion valve, micro-
Adjusting is then to be adjusted by porous variable flow electromagnetic valve, utilizes such two-stage regulative mode, can control more accurately
Spray enthalpy pressure, contributes to the lifting of system energy efficiency..
The control that spray enthalpy pressure also can be correlated with by the present invention, only arranges supercooling apparatus electric expansion valve and sprays
Enthalpy, arranges different supercooling apparatus electric expansion valve step numbers according to the different operating modes of detection and is controlled.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.With
It is only the preferred embodiment of the present invention described on, it is noted that for those skilled in the art, not
On the premise of departing from the technology of the present invention principle, it is also possible to make some improvement and modification, these improve and modification also should be regarded as this
The protection domain of invention.
Claims (14)
1. a spray enthalpy compressor air-conditioning system, it is characterised in that: include compressor (1), outdoor heat exchanger (2), indoor heat exchange
Device, and it is arranged on the enthalpy-increasing device between described outdoor heat exchanger (2) and described indoor heat exchanger, described enthalpy-increasing device includes
Supercooling apparatus (3) and the first control valve (4), also include that one end is connected to described compressor (1), the other end is connected to described enthalpy-increasing device
Spray enthalpy pipeline (5) of outlet side, on described spray enthalpy pipeline, (5) are provided with the second control valve (6).
Air conditioning system the most according to claim 1, it is characterised in that: described first control valve (4) is that supercool electromagnetism expands
Valve, and/or, described second control valve (6) is porous variable flow electromagnetic valve.
Air conditioning system the most according to claim 2, it is characterised in that: when described second control valve (6) is porous variable-flow
During electromagnetic valve, described porous variable flow electromagnetic valve includes price fixing (61) and matched Moving plate (62), described Moving plate (62)
Rotatably to control to flow through the flow generation change of this porous variable flow electromagnetic valve.
Air conditioning system the most according to claim 3, it is characterised in that: described price fixing (61) is disc structure, and thereon
Offer at least one crosses opening (611), and described Moving plate (62) is price fixing (61) radius of radius and described disc structure
Equal sector structure.
5. according to the air conditioning system one of claim 1-4 Suo Shu, it is characterised in that: at the air entry end of described compressor (1)
Also branch being provided with a branch road (7), the other end of this branch road (7) is connected to described porous flow solenoid valve (6) and described supercool
In line segments between device (3), and on this branch road (7), it is additionally provided with electromagnetic valve (8).
6. according to the air conditioning system one of claim 1-5 Suo Shu, it is characterised in that: the row of being additionally provided with at exhaust outlet of compressor
Atmospheric pressure sensor (9), is additionally provided with inspiratory pressure sensor (10) at compressor air suction mouth；Described spray enthalpy pipeline (5)
On be additionally provided with spray enthalpy pressure transducer (11).
7. according to the air conditioning system one of claim 1-6 Suo Shu, it is characterised in that: also set up on described spray enthalpy pipeline (5)
Have and only allow coolant to flow to the check valve (12) of described compressor (1).
8. the control method spraying enthalpy compressor air-conditioning system, it is characterised in that: use the spray that one of claim 1-7 is described
Enthalpy compressor air-conditioning system, is controlled its spray enthalpy process.
Control method the most according to claim 8, it is characterised in that: when cooling system runs: and when system includes electricity
Magnet valve, described first control valve are supercool electromagnetic expanding valve, the second control valve when being porous variable flow electromagnetic valve,
Supercool electromagnetic expanding valve controls logic according to system degree of supercooling and is controlled, and electromagnetic valve is opened, regulation porous variable-flow electricity
Magnet valve Moving plate makes all flowing holes be in closed state.
Control method the most according to claim 8, it is characterised in that: when system heating operation, and when system includes electricity
Magnet valve, described first control valve are supercool electromagnetic expanding valve, the second control valve when being porous variable flow electromagnetic valve:
If when system is in the heating operation starting stage, regulating supercool electric expansion valve and electromagnetic valve be in closed mode, be
System does not carry out spraying enthalpy action；
If when system heating operation is in stable operation stage, detecting pressure at expulsion and the pressure of inspiration(Pi) of now system, taking the two
Intermediate value be that target sprays enthalpy force value, open supercool electric expansion valve, regulation porous variable flow electromagnetic valve is to standard-sized sheet.
11. control methods according to claim 10, it is characterised in that: set when after compressor operating frequency 5min, it becomes
Rate is below 5%, then it reaches the aforementioned stable operation phase；The initial opening of supercool electric expansion valve is 250PLS, and it is complete
Aperture when opening is 480PLS.
12. according to the control method one of claim 10-11 Suo Shu, it is characterised in that: maintain supercool electric expansion valve initial
After aperture the first Preset Time, detection spray enthalpy pressure, draw and the difference of target spray enthalpy force value:
If difference is just, the most supercool electric expansion valve is preset aperture pace of change with first and is turned down；
If difference is negative, the most supercool electric expansion valve is preset aperture pace of change with second and is carried out out greatly.
13. control methods according to claim 12, it is characterised in that: carry out after aperture change adjusts again through the every time
Two Preset Times, detection current spray enthalpy pressure and target spray enthalpy pressure difference value, adjust further according to the magnitude range of difference
Joint controls.
14. control methods according to claim 13, it is characterised in that:
If difference≤0 and difference/target spray enthalpy pressure >=-10%, the most supercool electric expansion valve keeps current step number, porous unsteady flow
Amount electromagnetic valve is shown in a fully open operation,；
If difference=0, porous variable flow electromagnetic valve keeps full-gear；
If difference ＞ 0, porous variable flow electromagnetic valve carries out changes in flow rate control, is separately turned on 2/3,1/3, and two states is respectively tieed up
Holding the 3rd Preset Time, detection pressure difference value now, the aperture taking pressure difference value minimum remains on.
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