CN104976715B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN104976715B CN104976715B CN201510296099.9A CN201510296099A CN104976715B CN 104976715 B CN104976715 B CN 104976715B CN 201510296099 A CN201510296099 A CN 201510296099A CN 104976715 B CN104976715 B CN 104976715B
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- reversal valve
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000003507 refrigerant Substances 0.000 claims description 52
- 230000001172 regenerating effect Effects 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000005338 heat storage Methods 0.000 abstract 3
- 239000002918 waste heat Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000002826 coolant Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system and a control method thereof. This air conditioning system includes: a compressor; a heat storage device disposed outside the compressor and absorbing waste heat of the compressor; the first return pipeline is communicated to the air suction end of the compressor after flowing through the heat storage device; the second return pipeline is directly communicated to the air suction end of the compressor without flowing through the heat storage device; the detection device is arranged at the air suction end of the compressor and is used for detecting the air suction pressure of the compressor, the saturation temperature corresponding to the air suction pressure and the air suction temperature of the compressor; the air conditioning system selectively returns to the air suction end of the compressor through the first return pipeline or the second return pipeline according to the saturation temperature corresponding to the air suction pressure of the compressor and the air suction temperature of the compressor detected by the detection device. According to the air conditioning system, the suction superheat degree of the compressor can be improved, and the unit can still run efficiently and reliably under the low-temperature working condition.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of air-conditioning system and its control method.
Background technology
Prior art is by increasing a larger gas-liquid separator within air-conditioning systems, and is rationally controlled in program
Electric expansion valve throttles to ensure that compressor has certain suction superheat.But when ultralow temperature heats, due to outdoor operating mode
Relatively low, outdoor heat exchanger heat transfer effect is deteriorated, and liquid refrigerants can not absorb heat evaporation completely, and the long-term absorbing gas belt liquid of compressor operates,
Serious curtailments compressor life-span and unit reliability.
The content of the invention
A kind of air-conditioning system and its control method are provided in the embodiment of the present invention, can more accurately and effectively improve compression
Machine suction superheat, ensure that unit remains to high efficient and reliable operation in worst cold case.
To achieve the above object, the embodiment of the present invention provides a kind of air-conditioning system, including：Compressor；Regenerative apparatus, set
Outside compressor and absorb the used heat of compressor；First return line, flow through the suction end that compressor is communicated to after regenerative apparatus；
Second return line, it is not passed through the suction end that regenerative apparatus is directly communicated to compressor；Detection means, it is arranged on the suction of compressor
Gas end, and saturation temperature corresponding to the pressure of inspiration(Pi) and pressure of inspiration(Pi) of compressor is detected, and the suction temperature of compressor；Air-conditioning
Saturation temperature corresponding to the pressure of inspiration(Pi) for the compressor that system detects according to detection means and the suction temperature of compressor are optional
The suction end of compressor is back to through the first return line or the second return line with selecting.
Preferably, air-conditioning system also includes the first reversal valve, the first reversal valve includes first interface, second interface, the
Three interfaces and the 4th interface, the second interface of the first reversal valve and the 3rd interface are respectively communicated to regenerative apparatus, the first reversal valve
The 4th orifice to compressor suction end；
When the first interface of the first reversal valve and the 4th orifice and second interface and three orifices, the first commutation
The second return line, the first interface and second interface of the first reversal valve are formed between the entrance point of valve and the suction end of compressor
When connection and the 3rd interface and four orifices, first is formed between the entrance point of the first reversal valve and the suction end of compressor
Return line.
Preferably, air-conditioning system also includes：Gas-liquid separator, the 4th interface of the first reversal valve pass through gas-liquid separator
It is communicated to compressor；Second reversal valve, the first interface of the second reversal valve are communicated to compressor, the first interface of the first reversal valve
It is communicated to the 3rd interface of the second reversal valve.
Preferably, air-conditioning system also includes First Heat Exchanger and the second heat exchanger, the second reversal valve also connects including second
Mouth and the 4th interface, the second interface of the second reversal valve are communicated to First Heat Exchanger, and the 4th orifice of the second reversal valve is extremely
Second heat exchanger.
Preferably, detection means includes being arranged in the air inlet pipe of compressor to detect the pressure of inspiration(Pi) of compressor and suction
The pipe temperature sensor of the low pressure sensor of saturation temperature corresponding to atmospheric pressure and the suction temperature of detection compressor.
According to another aspect of the present invention, there is provided a kind of control method of above-mentioned air-conditioning system, including：Step S1：
Detect saturation temperature and the suction temperature of compressor corresponding to the pressure of inspiration(Pi) of compressor and judge whether compressor needs to improve
Suction superheat；Step S2：When needing to improve the suction superheat of compressor, into step S3；When compression need not be improved
During the suction superheat of machine, into step S4；Step S3：Air-conditioning system flows through the first return line, and refrigerant, which flows through, is arranged on pressure
The regenerative apparatus of compressor used heat is absorbed outside contracting machine, subsequently into compressor；Step S4：Air-conditioning system flows through the second return duct
Road, refrigerant are directly entered compressor without regenerative apparatus；Step S5：Return to step S1.
Preferably, step S1 includes：Detect outdoor environment temperature TOuter shroudAnd temperature compensation TCompensation, according to TOuter shroud、TAir-breathing、
TLow pressure corresponds to saturation temperatureAnd/or TCompensationJudge whether compressor needs to improve suction superheat.
Preferably, step S2 includes：When air-conditioning system is in refrigerating state, if detecting TOuter shroud>=a DEG C, then control
Refrigerant flows through the second return line, into step S4；Or when air-conditioning system is in heating state, if detecting TOuter shroud>=d DEG C,
Then control refrigerant flows through the first return line, into step S4, wherein d<a.
Preferably, step S2 includes：When air-conditioning system is in refrigerating state, if detecting TOuter shroud＜ a DEG C, are examined simultaneously
Measure TLow pressure corresponds to saturation temperature≥TAir-breathing+TCompensate bAnd continue the T1 times, then control refrigerant to flow through the first return line, into step S3；Or
When air-conditioning system is in heating state, if detecting TOuter shroud＜ d DEG C, are detected simultaneously by TLow pressure corresponds to saturation temperature≥TAir-breathing+TCompensate eAnd continue
The T4 times, then refrigerant is controlled to flow through the first return line, into step S3.
Preferably, after step S1 is performed, step S2 also includes：When air-conditioning system is in refrigerating state, if inspection
Measure TOuter shroud>=a DEG C and continue the T2 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate cAnd continue the T3 times, then control refrigerant to flow through second
Return line, into step S4.
Preferably, after step S1 is performed, step S2 also includes：When air-conditioning system is in heating state, if inspection
Measure TOuter shroud>=d DEG C and continue the T5 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate fAnd continue the T6 times, then control refrigerant to flow through second
Return line, into step S4.
Apply the technical scheme of the present invention, air-conditioning system includes：Compressor；Regenerative apparatus, it is arranged on outside compressor and inhales
Receive the used heat of compressor；First return line, flow through the suction end that compressor is communicated to after regenerative apparatus；Second return line,
It is not passed through the suction end that regenerative apparatus is directly communicated to compressor；Detection means, is arranged on the suction end of compressor, and detects pressure
Saturation temperature corresponding to the pressure of inspiration(Pi) and pressure of inspiration(Pi) of contracting machine, and the suction temperature of compressor；Air-conditioning system is according to detection
Saturation temperature corresponding to the pressure of inspiration(Pi) for the compressor that device detects and the suction temperature of compressor are alternatively through first time
Flow tube road or the second return line are back to compressor.Because air-conditioning system is the suction of the compressor detected according to detection means
Saturation temperature corresponding to atmospheric pressure and the return line of the suction temperature of compressor selection circulation, therefore can be according to compressor
Relation between saturation temperature corresponding to pressure of inspiration(Pi) and the suction temperature of compressor selects whether air-conditioning system flows through accumulation of heat
Device, so as to be adjusted to the suction superheat of compressor, air-conditioning system can be caused to the suction superheat of compressor
Adjustment more accurately and timely, ensures that unit remains to high efficient and reliable operation in worst cold case.
Brief description of the drawings
Fig. 1 is the systematic schematic diagram of the air-conditioning system of the embodiment of the present invention；
Fig. 2 is the control principle drawing of the air-conditioning system of the embodiment of the present invention；
Fig. 3 is the control process figure of the air-conditioning system of the embodiment of the present invention.
Description of reference numerals：1st, compressor；2nd, regenerative apparatus；3rd, gas-liquid separator；4th, the second reversal valve；5th, the first commutation
Valve；6th, First Heat Exchanger；7th, the second heat exchanger；8th, low pressure sensor；9th, pipe temperature sensor.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as the limit to the present invention
It is fixed.
Shown in Figure 1, according to an embodiment of the invention, air-conditioning system includes compressor 1；Regenerative apparatus 2, it is arranged on pressure
Contracting machine 1 is outer and absorbs the used heat of compressor 1；First return line, flow through the suction end that compressor 1 is communicated to after regenerative apparatus 2；
Second return line, it is not passed through the suction end that regenerative apparatus 2 is directly communicated to compressor 1；Detection means, it is arranged on compressor 1
Suction end, and detect saturation temperature corresponding to the pressure of inspiration(Pi) and pressure of inspiration(Pi) of compressor 1, and the air-breathing temperature of compressor 1
Degree；Saturation temperature and the air-breathing of compressor 1 corresponding to the pressure of inspiration(Pi) for the compressor 1 that air-conditioning system detects according to detection means
Temperature is back to the suction end of compressor 1 alternatively through the first return line or the second return line.
Because air-conditioning system is saturation temperature and pressure corresponding to the pressure of inspiration(Pi) of the compressor 1 detected according to detection means
Contracting machine 1 suction temperature selection circulation return line, therefore can according to corresponding to the pressure of inspiration(Pi) of compressor 1 saturation temperature
Relation between the suction temperature of compressor 1 selects whether air-conditioning system flows through regenerative apparatus 2, so as to compressor 1
Suction superheat is adjusted, and can cause adjustment of the air-conditioning system to the suction superheat of compressor 1 more accurately and timely, is protected
Card unit remains to high efficient and reliable operation in worst cold case.
Air-conditioning system also includes the first reversal valve 5, and the first reversal valve includes first interface a, second interface b, the 3rd interface c
Regenerative apparatus 2, the first reversal valve 5 are respectively communicated to the 4th interface d, the second interface b and the 3rd interface c of the first reversal valve 5
The 4th interface d be communicated to the suction end of compressor 1；The first interface a of first reversal valve 5 is connected and second with the 4th interface d
When interface b connects with the 3rd interface c, the second return duct is formed between the entrance point of the first reversal valve 5 and the suction end of compressor 1
Road, when the first interface a of the first reversal valve 5 connects with second interface b and the 3rd interface c is connected with the 4th interface d, the first commutation
The first return line is formed between the entrance point of valve 5 and the suction end of compressor 1.First reversal valve 5 is preferably four-way commutation
Valve.
By first reversal valve 5, the refrigerant path that compressor can be easily back to air-conditioning system is adjusted,
So as to easily and timely adjust the suction superheat of compressor 1, the work efficiency of air-conditioning system is improved.
First return line and the second return line can also be by way of setting switch valve come real respectively on pipeline
Present condition switches.
Air-conditioning system also includes the reversal valve 4 of gas-liquid separator 3 and second, and the 4th interface d of the first reversal valve 5 passes through gas-liquid
Separator 3 is communicated to compressor 1；The first interface a of second reversal valve 4 is communicated to compressor 1, and the first of the first reversal valve 5 connects
Mouth a is communicated to the 3rd interface C of the second reversal valve 4.Gas-liquid separator 3 is communicated to compressor 1, and the refrigerant after evaporation is carried out
Gas-liquid separation, and gaseous coolant is delivered to compressor.The first interface A of second reversal valve 4 is communicated to the outlet of compressor 1,
Refrigerant flow direction during heating and refrigerating state for adjusting air-conditioning system.
When air-conditioning system works, if necessary to improve the suction superheat of compressor, the first commutation can be now adjusted
The operating position of valve 5 to the second, refrigerant from the 3rd interface C of the second reversal valve 4 after flowing out, and first through the first reversal valve 5
Interface a and second interface b enters in regenerative apparatus 2, after the heating of regenerative apparatus 2, is flowed out from the outlet of regenerative apparatus 2, warp
The 3rd interface c and the 4th interface d of first reversal valve 5 are flowed in gas-liquid separator 3, are then flow back into through gas-liquid separator 3
In compressor 1.Because temperature gets a promotion when refrigerant flows in the regenerative apparatus 2, liquid refrigerants can be made further to absorb heat steaming
Hair, therefore gasification degree can be improved after entering gas-liquid separator 3, the compressor air suction degree of superheat is improved, avoids compressor long-term
Absorbing gas belt liquid operates, and ensures that air-conditioning system remains to high efficient and reliable operation in worst cold case, lifts the comfortable sexual experience of user.
By setting regenerative apparatus 2 outside compressor 1, the used heat of compressor 1 can be more fully utilized, improves the energy
Utilization rate, reduce refrigeration cost.By setting the first reversal valve 5, Ke Yitong between the second reversal valve 4 and gas-liquid separator 3
The mode of the working condition of the first reversal valve of adjustment is crossed, when needing to improve the suction superheat of compressor 1, easily utilizes storage
Thermal 2 heats to the refrigerant for entering compressor 1, when that need not improve the suction superheat of compressor 1, avoids refrigerant
Regenerative apparatus 2 is flowed through, improves the heat accumulation of regenerative apparatus 2, control is more convenient, and it is right can further to improve regenerative apparatus 2
The temperature lifting effect of refrigerant.
Air-conditioning system also includes the heat exchanger 7 of First Heat Exchanger 6 and second, and the second reversal valve 4 also includes second interface B and the
Four interface D, the second interface B of the second reversal valve 4 are communicated to First Heat Exchanger 6, and the 4th interface D of the second reversal valve 4 is communicated to
Second heat exchanger 7.Second reversal valve 4 can be conveniently adjusted the flow path after refrigerant flows out out of compressor 1, realize air-conditioning
The heating of system and refrigerating function, it is simple in construction, it is easy to adjust.
In the present embodiment, the second reversal valve 4 and the first reversal valve 5 are four-way valve, and cost is relatively low, technology maturation, control
System is more safe and reliable.
Detection means includes being arranged in the air inlet pipe of compressor 1 to detect the pressure of inspiration(Pi) of compressor 1 and pressure of inspiration(Pi)
The pipe temperature sensor 9 of the low pressure sensor 8 of corresponding saturation temperature and the suction temperature of detection compressor 1.The low pressure sensor 8
It can detect into the refrigerant pressure in gas-liquid separator 3, namely the pressure of inspiration(Pi) of compressor 1, and according to pressure acquisition pair
The saturation temperature answered.The pipe temperature sensor 9 is temperature-sensitive bag, can obtain the refrigerant temperature into compressor 1, namely compressor 1
Suction temperature.By the suction temperature to compressor 1 compared with the saturation temperature of refrigerant, it may be determined that whether need pair
The suction superheat of compressor 1 is adjusted.
Environment temperature temperature-sensitive bag and defrost temperature-sensitive bag are additionally provided with First Heat Exchanger 6, wherein environment temperature temperature-sensitive bag can
To detect current outdoor environment temperature, defrost temperature-sensitive bag can control air-conditioning system whether to enter defrost and handle.
With reference to shown in referring to Fig. 2 and Fig. 3, according to an embodiment of the invention, the control method of air-conditioning system includes：Step
S1：Saturation temperature and the suction temperature of compressor corresponding to the pressure of inspiration(Pi) of compressor 1 are detected, and judges whether compressor 1 needs
Improve suction superheat；Step S2：When needing to improve the suction superheat of compressor 1, into step S3；When need not carry
During the suction superheat of high compressor 1, into step S4；Step S3：Air-conditioning system flows through the first return line, and refrigerant, which flows through, to be set
The regenerative apparatus 2 that compressor used heat is absorbed outside compressor 1 is put, subsequently into compressor 1；Step S4：Air-conditioning system flows through
Two return lines, refrigerant are directly entered compressor 1 without regenerative apparatus 2；Step S5：Return to step S1.
By the above-mentioned means, regenerative apparatus 2 can be utilized when needing to improve the suction superheat of compressor 1
The heat drawn from the waste gas of compressor 1 heats to refrigerant, improves capacity usage ratio, and improve the work of air-conditioning system
Performance, when that need not improve to the suction superheat of compressor 1, refrigerant is set to need not move through regenerative apparatus 2, air-conditioning system
Keep normal operating conditions so that air-conditioning system can easily normal operation mode and lifting degree of superheat operational mode it
Between toggle.And due to judging whether air-conditioning system needs to improve the degree of superheat it is pressure of inspiration(Pi) by detecting compressor 1
Corresponding saturation temperature and the suction temperature of compressor are judged, therefore the tune of the suction superheat for compressor 1
The whole overall efficiency that more accurately and timely, can further improve air-conditioning system.
In the present embodiment, air-conditioning system switches over logical between normal operation mode and lifting degree of superheat operational mode
The return flow path for crossing adjustment refrigerant is realized, namely is flowed through the first return line by adjusting refrigerant or flowed through the second return line
Realize.
In the present embodiment, whether detection compressor 1 needs raising suction superheat also to include, and detects outdoor environment temperature
TOuter shroud, temperature compensation TCompensation, then can be according to TOuter shroud、TAir-breathing、TLow pressure corresponds to saturation temperatureAnd/or TCompensationJudge whether compressor 1 needs
Improve suction superheat.
Specifically, after air-conditioning system startup, when air-conditioning system is in refrigerating state, the second reversal valve 4 must not
Electricity, the first interface A of the second reversal valve 4 connect with second interface B, and the 3rd interface C connects with the 4th interface D, and refrigerant is from compression
After machine 1 flows out, through First Heat Exchanger 6 and electric expansion valve, then it is evaporated in the second heat exchanger 7, from the second heat exchanger 7
Fourth interface D and threeth interface C of the refrigerant of interior outflow through the second reversal valve 4 flow to the first reversal valve 5.
If now detect TOuter shroud>=a DEG C, then the first reversal valve 5 must not be electric, the first interface a and the 4th of the first reversal valve 5
Interface d is connected, and second interface b and the 3rd interface the c connection of the first reversal valve 5, air-conditioning system enter step S4 so that refrigerant stream
Through the second return line, refrigerant is directly entered gas-liquid separator 3 after the first reversal valve 5, and without regenerative apparatus 2, so
The gas vent of gaseous coolant from gas-liquid separator 3 is flowed in compressor 1 afterwards.A herein is, for example, 5-15 DEG C, it is therefore preferable to
10℃。
When air-conditioning system is in heating state, the second reversal valve 4 obtains electric, the first interface A and the 4th of the second reversal valve 4
Interface D is connected, and second interface B connects with the 3rd interface C, and refrigerant is swollen through the second heat exchanger 7 and electronics after the outflow of compressor 1
Swollen valve, then it is evaporated in First Heat Exchanger 6, from second of the interior refrigerant flowed out of First Heat Exchanger 6 through the second reversal valve 4
Interface B and the 3rd interface C flow to the first reversal valve 5.
If now detect TOuter shroud>=d DEG C, then the first reversal valve 5 must not be electric, the first interface a and the 4th of the first reversal valve 5
Interface d is connected, and second interface b and the 3rd interface the c connection of the first reversal valve 5, air-conditioning system enter step S4, and refrigerant is through second
Return line is back to the suction end of compressor 1, i.e. refrigerant is directly entered gas-liquid separator 3 after the first reversal valve 5, then
The gas vent of gaseous coolant from gas-liquid separator 3 flows to the suction end of compressor 1.
D herein is, for example, -10-0 DEG C, it is therefore preferable to -5 DEG C.
After air-conditioning system startup, when air-conditioning system is in refrigerating state, if detecting TOuter shroud＜ a DEG C, if simultaneously
Detect TLow pressure corresponds to saturation temperature≥TAir-breathing+TCompensate bAnd continuing the T1 times, then the first reversal valve 5 obtains electric, the first interface of the first reversal valve 5
A connects with second interface b, and the 3rd interface c and the 4th interface d connections, air-conditioning system enter step S3, and refrigerant is through the first return duct
Road is back to the suction end of compressor 1, specifically, after first interface a and second interface b of the refrigerant through the first reversal valve 5
Into in regenerative apparatus 2, after carrying out heat temperature raising in regenerative apparatus 2, gas is flowed to through the 3rd interface c and the 4th interface d
Liquid/gas separator 3, then the gas vent of gaseous coolant from gas-liquid separator 3 flow in compressor 1.T hereinCompensate bTo correspond to
In T nowAir-breathingCompensation temperature.
A herein is, for example, 5-15 DEG C, it is therefore preferable to which 10 DEG C, T1 is, for example, 5 minutes, the numerical value of a herein and T1 number
Value can be set according to the actual working environment of air-conditioning system by staff.
In air-conditioning system running, the first reversal valve 5 it is electric in the case of, i.e., air-conditioning system enter step S3 it
Afterwards, refrigerant flows through the suction end that the first return line is back to compressor 1, and air-conditioning system continues return to step S1 and detected,
If now detect TOuter shroud>=a DEG C and continue the T2 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate cAnd continue the T3 times, then control first
First interface a and the 4th interface the d connection of the power down of reversal valve 5, now the first reversal valve 5, the second interface b of the first reversal valve 5
Connected with the 3rd interface c, air-conditioning system enters step S4, and refrigerant is directly back to the air-breathing of compressor 1 through the second return line
End, recover normal operation mode.T hereinCompensate cFor corresponding to T nowAir-breathingCompensation temperature.
A herein is, for example, 5-15 DEG C, it is therefore preferable to and 10 DEG C, T2 and T3 are, for example, 5 minutes, the numerical value and T2 of a herein,
T3 numerical value can be set according to the actual working environment of air-conditioning system by staff.
After the power down of the first reversal valve 5, now first interface a and the 4th interface the d connection of the first reversal valve 5, first
Second interface b and the 3rd interface the c connection of reversal valve 5, refrigerant are directly back to the air-breathing of compressor 1 through the second return line
End, now air-conditioning system is back to step S1, continues to judge whether that reaching the first reversal valve 5 obtains electric condition according to testing result.
When air-conditioning system is in heating state, if detecting TOuter shroud＜ d DEG C, if detecting TLow pressure corresponds to saturation temperature≥TAir-breathing+
TCompensate eAnd continue the T4 times, then the first reversal valve 5 obtains electric, and the first interface a of the first reversal valve 5 connects with second interface b, and the 3rd
Interface c and the 4th interface d connections, air-conditioning system enter step S3, and refrigerant enters in regenerative apparatus 2 after the first reversal valve 5,
After carrying out heat temperature raising in regenerative apparatus 2, gas-liquid separator 3 is flowed to, then gas of the gaseous coolant from gas-liquid separator 3
In body output flow to compressor 1.T hereinCompensate eFor corresponding to T nowAir-breathingCompensation temperature.
D herein is, for example, -10-0 DEG C, it is therefore preferable to which -5 DEG C, T4 is, for example, 5 minutes, the numerical value of d herein and T4 number
Value can be set according to the actual working environment of air-conditioning system by staff.
When air-conditioning system is in heating state, the first reversal valve 5 it is electric in the case of, refrigerant is through the first return line
Into compressor 1, i.e., in the case that air-conditioning system enters step S3, continue return to step S1 and detected, if now detecting
TOuter shroud>=d DEG C and continue the T5 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate fAnd continue the T6 times, then the power down of the first reversal valve 5, first
First interface a and the 4th interface the d connection of reversal valve 5, second interface b and the 3rd interface the c connection of the first reversal valve 5, refrigerant
The suction end that the second return line enters compressor 1 is flowed through, air-conditioning system enters step S4, recovers normal operation mode.
D herein is, for example, -10-0 DEG C, it is therefore preferable to which -5 DEG C, T5 is, for example, 5 minutes, and T6 is, for example, 5 minutes, d herein
Numerical value and T5, T6 numerical value can be set according to the actual working environment of air-conditioning system by staff.Herein
TCompensate fFor corresponding to T nowAir-breathingCompensation temperature.
After the power down of the first reversal valve 5, first interface a and the 4th interface the d connection of the first reversal valve 5, the first commutation
Second interface b and the 3rd interface the c connection of valve 5, air-conditioning system operational mode back to normal, and step S1 is back to, continue root
Judge whether that reaching the first reversal valve 5 obtains electric condition according to testing result.
Relation between above-mentioned d and a values should meet d<a.
When detecting that air-conditioning system is in during defrost, it is necessary to keep the first reversal valve 5 to be in power-down state, namely
Air-conditioning system is kept to be in normal operation mode.
In addition, the time interval of the power on and off of the first reversal valve 5 must is fulfilled for requiring, i.e.,：
On first reversal valve 5 after electricity, at least operation T7 minutes can just judge whether power down；After the power down of first reversal valve 5, extremely
Interval T8 minutes can just judge whether upper electricity less, so as to ensure the validity of air-conditioning system temperature detection data.T7 examples herein
It it is such as 5 minutes, T8 is, for example, 30 minutes.
Certainly, above is the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art
For, on the premise of its general principles are not departed from, some improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (11)
- A kind of 1. air-conditioning system, it is characterised in that including：Compressor (1)；Regenerative apparatus (2), it is arranged on the compressor (1) outside and absorbs the used heat of the compressor (1)；First return line, flow through the suction end that the compressor (1) is communicated to after the regenerative apparatus (2)；Second return line, it is not passed through the suction end that the regenerative apparatus (2) is directly communicated to the compressor (2)；Detection means, is arranged on the suction end of the compressor (1), and detects the pressure of inspiration(Pi) and air-breathing of the compressor (1) Saturation temperature corresponding to pressure, and the suction temperature of the compressor (1)；Saturation temperature and pressure corresponding to the pressure of inspiration(Pi) for the compressor (1) that the air-conditioning system detects according to the detection means The suction temperature of contracting machine (1) is back to the compressor alternatively through first return line or second return line (1) suction end.
- 2. air-conditioning system according to claim 1, it is characterised in that the air-conditioning system also includes the first reversal valve (5), First reversal valve (5) includes first interface, second interface, the 3rd interface and the 4th interface, first reversal valve (5) Second interface and the 3rd interface are respectively communicated to the regenerative apparatus (2), and the 4th orifice of first reversal valve (5) is extremely The suction end of the compressor (1)；It is described when the first interface and the 4th orifice and second interface of first reversal valve (5) are with three orifices Second return line, the first commutation are formed between the entrance point of first reversal valve (5) and the suction end of the compressor (1) The first interface of valve (5) connects with second interface and when the 3rd interface and four orifice, and the first reversal valve (5) are entered First return line is formed between mouth end and the suction end of the compressor (1).
- 3. air-conditioning system according to claim 2, it is characterised in that the air-conditioning system also includes：Gas-liquid separator (3), the 4th interface of first reversal valve (5) are communicated to described by the gas-liquid separator (3) Compressor (1)；Second reversal valve (4), the first interface of second reversal valve (4) are communicated to the compressor (1), first commutation The first interface of valve (5) is communicated to the 3rd interface of second reversal valve (4).
- 4. air-conditioning system according to claim 3, it is characterised in that the air-conditioning system also includes First Heat Exchanger (6) With the second heat exchanger (7), second reversal valve (4) also includes second interface and the 4th interface, second reversal valve (4) Second interface is communicated to First Heat Exchanger (6), the 4th orifice to the second heat exchanger (7) of second reversal valve (4).
- 5. air-conditioning system according to claim 1, it is characterised in that the detection means includes being arranged on the compressor (1) sensed in air inlet pipe with detecting the low pressure of saturation temperature corresponding to the pressure of inspiration(Pi) and pressure of inspiration(Pi) of the compressor (1) The pipe temperature sensor (9) of the suction temperature of device (8) and the detection compressor (1).
- A kind of 6. control method of air-conditioning system as any one of claim 1 to 5, it is characterised in that including：Step S1：Saturation temperature and the suction temperature of compressor corresponding to the pressure of inspiration(Pi) of detection compressor (1) simultaneously judge to compress Whether machine (1) needs to improve suction superheat；Step S2：When needing to improve the suction superheat of compressor (1), into step S3；When compressor (1) need not be improved Suction superheat when, into step S4；Step S3：Air-conditioning system flows through the first return line, and refrigerant, which flows through, to be arranged on compressor (1) and absorb compressor used heat outside Regenerative apparatus (2), subsequently into compressor (1)；Step S4：Air-conditioning system flows through the second return line, and refrigerant is directly entered compressor (1) without regenerative apparatus (2)；Step S5：Return to step S1.
- 7. the control method of air-conditioning system according to claim 6, it is characterised in that the step S1 also includes：Detect outdoor environment temperature TOuter shroudAnd temperature compensation TCompensation, according to TOuter shroud、TAir-breathing、TLow pressure corresponds to saturation temperatureAnd/or TCompensationJudge pressure Whether contracting machine (1) needs to improve suction superheat.
- 8. the control method of air-conditioning system according to claim 7, it is characterised in that the step S2 includes：Work as air-conditioning When system is in refrigerating state, if detecting TOuter shroud>=a DEG C, then control refrigerant to flow through the second return line, into step S4；Or When air-conditioning system is in heating state, if detecting TOuter shroud>=d DEG C, then control refrigerant to flow through the first return line, into step S4, wherein d<a.
- 9. the control method of air-conditioning system according to claim 7, it is characterised in that the step S2 includes：Work as air-conditioning When system is in refrigerating state, if detecting TOuter shroudT is detected while ＜ a DEG CLow pressure corresponds to saturation temperature≥TAir-breathing+TCompensate bAnd when continuing T1 Between, then control refrigerant to flow through the first return line, into step S3；Or when air-conditioning system is in heating state, if detecting TOuter shroud＜ d DEG C, are detected simultaneously by TLow pressure corresponds to saturation temperature≥TAir-breathing+TCompensate eAnd continue the T4 times, then control refrigerant to flow through the first return duct Road, into step S3.
- 10. the control method of air-conditioning system according to claim 7, it is characterised in that after the step S1 is performed, The step S2 also includes：When air-conditioning system is in refrigerating state, if detecting TOuter shroud>=a DEG C and continue the T2 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate cAnd continue the T3 times, then control refrigerant to flow through the second return line, into step S4.
- 11. the control method of air-conditioning system according to claim 7, it is characterised in that after the step S1 is performed, The step S2 also includes：When air-conditioning system is in heating state, if detecting TOuter shroud>=d DEG C and continue the T5 times, or TLow pressure corresponds to saturation temperature＜ TAir-breathing+TCompensate fAnd continue the T6 times, then control refrigerant to flow through the second return line, into step S4.
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| CN105783138B (en) * | 2016-04-15 | 2019-05-14 | 海信（山东）空调有限公司 | A kind of outdoor air-conditioner |
| CN105865073B (en) * | 2016-04-18 | 2018-06-01 | 广东美的制冷设备有限公司 | Air-conditioning system and its control method |
| CN106288565A (en) * | 2016-10-31 | 2017-01-04 | 广东美的制冷设备有限公司 | Air-conditioning does not shut down defrosting system and method and air-conditioning |
| CN106403423A (en) * | 2016-10-31 | 2017-02-15 | 广东美的制冷设备有限公司 | Air conditioner defrosting system and method and air conditioner |
| CN109236625B (en) * | 2018-08-30 | 2020-10-23 | 珠海格力电器股份有限公司 | Compressor control method and device and electrical equipment |
| CN109163480A (en) * | 2018-10-18 | 2019-01-08 | 中国科学院广州能源研究所 | A kind of quick oiling gas engine heat pump system |
| JP6972422B2 (en) * | 2019-02-28 | 2021-11-24 | 三菱電機株式会社 | Refrigeration cycle device |
| CN110160207A (en) * | 2019-05-20 | 2019-08-23 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner |
| CN110173831A (en) * | 2019-05-20 | 2019-08-27 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner |
| CN110131856B (en) * | 2019-05-20 | 2021-07-20 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN112344442A (en) * | 2019-07-25 | 2021-02-09 | 青岛海尔空调器有限总公司 | Air conditioner |
| CN110530054A (en) * | 2019-09-06 | 2019-12-03 | 广东美的暖通设备有限公司 | Heat pump system and its control method, control device and storage medium |
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