CN105928266A - Multi-online system and control method for heating and throttling element of multi-online system - Google Patents
Multi-online system and control method for heating and throttling element of multi-online system Download PDFInfo
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- CN105928266A CN105928266A CN201610348574.7A CN201610348574A CN105928266A CN 105928266 A CN105928266 A CN 105928266A CN 201610348574 A CN201610348574 A CN 201610348574A CN 105928266 A CN105928266 A CN 105928266A
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0313—Pressure sensors near the outdoor heat exchanger
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
-
- 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
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
-
- 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
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a multi-online system and a control method for a heating and throttling element of the multi-online system. The method comprises the following steps that the target exhaust pressure of a compressor or the saturation temperature corresponding to the target exhaust pressure is obtained; the compressor is controlled according to the target exhaust pressure or the saturation temperature corresponding to the target exhaust pressure, and the current exhaust overheat degree of the compressor is obtained after the compressor stably runs; the target exhaust overheat degree of the compressor is obtained, and whether the current exhaust overheat degree is smaller than the target exhaust overheat degree or not is judged; and if the current exhaust overheat degree is smaller than the target exhaust overheat degree, aperture decreasing control over the heating and throttling element is conducted till the difference value between the high-pressure pressure and the intermediate-pressure pressure of a diversion device is smaller than the first preset value or when a liquid accumulation signal of a heating indoor unit is received, the aperture decreasing of the heating and throttling element is forbidden, and therefore it is guaranteed that the system has the high overheat degree. When the system conducts heating, especially in heating of part of loads, better performance and higher energy efficiency are achieved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to a kind of multiple on-line system heats restricting element control method and
A kind of multiple on-line system.
Background technology
Multiple on-line system have pure refrigeration, pure heat, main refrigeration and main heat four kinds of patterns.Wherein, main refrigeration mode and master
Heating mode can utilize condensation heat and the heat of evaporation of system simultaneously, it is achieved freezes simultaneously and heats, and substantially increases system energy
Effect.
In multiple on-line system running, the high pressure gas of off-premises station high-voltage tube enters and heats indoor set, puts heating indoor set
After heat, it expand into low-pressure gas by electric expansion valve and return to off-premises station.The aperture of electric expansion valve can affect entrance heating chamber
The refrigerant flow of interior machine, also can regulate the condensation temperature heating indoor set simultaneously, and suitable aperture can make both to have heated indoor set
There is higher refrigerant flow and also have higher condensation temperature simultaneously, thus export higher heating capacity.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, it is an object of the present invention to the control method proposing to heat restricting element in a kind of multiple on-line system, the party
The aperture heating restricting element is adjusted by method by the discharge superheat of compressor, and by the high-pressure of part flow arrangement
And the difference between middle pressure pressure, in heating chamber, chance occurs forbidding during hydrops state turning down the aperture heating restricting element,
Thus ensure that system has the higher degree of superheat, and make system under heating, especially sub-load heats down, has preferably
Performance and efficiency.
Further object is that a kind of multiple on-line system of proposition.
For achieving the above object, one aspect of the present invention embodiment heats the control of restricting element in proposing a kind of multiple on-line system
Method, it is characterised in that described multiple on-line system includes off-premises station, part flow arrangement and multiple indoor set, described off-premises station bag
Including compressor, described part flow arrangement includes First Heat Exchanger, the second heat exchanger and heats restricting element, described First Heat Exchanger
The outlet of the first heat exchange stream be connected with the entrance of the first heat exchange stream of described second heat exchanger, described second heat exchanger
The outlet of the second heat exchange stream be connected with the entrance of the second heat exchange stream of described First Heat Exchanger, described in heat throttling unit
Part is arranged on the outlet of the first heat exchange stream of described second heat exchanger and the entrance of the second heat exchange stream of described second heat exchanger
Between, said method comprising the steps of: obtain the target exhaust pressure of described compressor or described target exhaust pressure pair
The saturation temperature answered；According to saturation temperature corresponding to described target exhaust pressure or described target exhaust pressure to described compression
Machine is controlled such that described compressor stable operation, and obtains the current of described compressor after described compressor stable operation
Discharge superheat；Obtain the target exhaust degree of superheat of described compressor, and judge that whether the described current exhaust degree of superheat is less than institute
State the target exhaust degree of superheat；And if the described current exhaust degree of superheat is less than the described target exhaust degree of superheat, then to described system
Thermal throttle element carries out aperture and turns control down, until the difference between the high-pressure of described part flow arrangement and middle pressure pressure is less than
First preset value or when receiving the hydrops signal heating indoor set, forbids heating described in turning down the aperture of restricting element.
Multiple on-line system according to embodiments of the present invention heats the control method of restricting element, first obtains the target of compressor
Pressure at expulsion or saturation temperature corresponding to target exhaust pressure, and corresponding according to target exhaust pressure or target exhaust pressure
Saturation temperature compressor is controlled such that compressor stable operation, and after compressor stable operation, obtain compressor
The current exhaust degree of superheat.Then, obtain the target exhaust degree of superheat of compressor, and judge whether the current exhaust degree of superheat is less than
The target exhaust degree of superheat, if the current exhaust degree of superheat is less than the target exhaust degree of superheat, then carries out aperture to heating restricting element
Turn control down, until the difference between the high-pressure of part flow arrangement and middle pressure pressure less than the first preset value or receives system
During the hydrops signal of hot indoor set, forbid turning down the aperture heating restricting element, thus ensure that system has the higher degree of superheat,
Making system under heating, especially sub-load heats down, has better performance and efficiency.
According to one embodiment of present invention, if the described current exhaust degree of superheat is more than the described target exhaust degree of superheat, the most right
The described restricting element that heats carries out aperture and tunes up control.
According to one embodiment of present invention, after the described aperture heating restricting element is adjusted, also include: judge
Whether the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat, and judges the current exhaust pressure pair of described compressor
The saturation temperature that the saturation temperature answered is the most corresponding more than or equal to the target exhaust pressure of described compressor, and judge described pressure
Whether the running frequency of contracting machine is more than or equal to peak frequency；If the described current exhaust degree of superheat is overheated equal to described target exhaust
Degree, or saturation temperature corresponding to the current exhaust pressure of described compressor is more than or equal to the target exhaust pressure of described compressor
Corresponding saturation temperature, or the running frequency of described compressor is more than or equal to described peak frequency, then heat joint described in control
The aperture of fluid element keeps constant.
According to one embodiment of present invention, if the described current exhaust degree of superheat is not equal to the described target exhaust degree of superheat, institute
State the saturated temperature that saturation temperature corresponding to the current exhaust pressure of compressor is corresponding less than the target exhaust pressure of described compressor
The running frequency of described compressor less than described peak frequency, is then adjusted by the running frequency of degree and described compressor,
And according to the running frequency of the compressor after regulation, the described aperture heating restricting element is adjusted.
According to one embodiment of present invention, described multiple on-line system is operated in heating mode, main heating mode or main refrigeration mould
Under formula.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of multiple on-line system, including: off-premises station, institute
State off-premises station and include compressor；Multiple indoor sets；Part flow arrangement, described part flow arrangement includes First Heat Exchanger, the second heat exchange
Device and heat restricting element, the outlet of the first heat exchange stream of described First Heat Exchanger and the first heat exchange of described second heat exchanger
The entrance of stream is connected, the outlet of the second heat exchange stream of described second heat exchanger and the second heat exchange of described First Heat Exchanger
The entrance of stream is connected, described in heat restricting element and be arranged on the outlet of the first heat exchange stream and the institute of described second heat exchanger
State between the entrance of the second heat exchange stream of the second heat exchanger；Control module, described control module is used for obtaining described compressor
Target exhaust pressure or saturation temperature corresponding to described target exhaust pressure, and according to described target exhaust pressure or institute
State saturation temperature corresponding to target exhaust pressure and described compressor is controlled such that described compressor stable operation, and in institute
Obtaining the current exhaust degree of superheat of described compressor after stating compressor stable operation, described control module obtains described compressor
The target exhaust degree of superheat, and judge the described current exhaust degree of superheat whether less than the described target exhaust degree of superheat, wherein, if
The described current exhaust degree of superheat is less than the described target exhaust degree of superheat, then carry out the described restricting element that heats aperture and turn control down,
Until the difference between the high-pressure of described part flow arrangement and middle pressure pressure less than the first preset value or receives in heating chamber
During the hydrops signal of machine, forbid heating described in turning down the aperture of restricting element.
Multiple on-line system according to embodiments of the present invention, first control module obtains target exhaust pressure or the target of compressor
The saturation temperature that pressure at expulsion is corresponding, and according to saturation temperature corresponding to target exhaust pressure or target exhaust pressure to compression
Machine is controlled such that compressor stable operation, and obtains the current exhaust degree of superheat of compressor after compressor stable operation.
Then, control module obtains the target exhaust degree of superheat of compressor, and judges that whether the current exhaust degree of superheat is less than target exhaust
The degree of superheat, if the current exhaust degree of superheat is less than the target exhaust degree of superheat, then carries out aperture and turns control down heating restricting element,
Until difference between the high-pressure of part flow arrangement and middle pressure pressure less than the first preset value or receives and heats indoor set
During hydrops signal, forbid turning down the aperture heating restricting element, thus ensure that system has the higher degree of superheat, make system exist
Heating down, especially sub-load heats down, has better performance and efficiency.
According to one embodiment of present invention, if the described current exhaust degree of superheat is more than the described target exhaust degree of superheat, described
Control module then carries out aperture tune up control to the described restricting element that heats.
According to one embodiment of present invention, after the described aperture heating restricting element is adjusted, described control module
Also judge that whether the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat, and judge the current exhaust of described compressor
The saturation temperature that saturation temperature corresponding to pressure is the most corresponding more than or equal to the target exhaust pressure of described compressor, and judge
Whether the running frequency of described compressor is more than or equal to peak frequency, and arranges equal to described target in the described current exhaust degree of superheat
The gas degree of superheat, or saturation temperature corresponding to the current exhaust pressure of described compressor is more than or equal to the target row of described compressor
The saturation temperature that atmospheric pressure is corresponding, or when the running frequency of described compressor is more than or equal to described peak frequency, control described
The aperture heating restricting element keeps constant.
According to one embodiment of present invention, if the described current exhaust degree of superheat is not equal to the described target exhaust degree of superheat, institute
State the saturated temperature that saturation temperature corresponding to the current exhaust pressure of compressor is corresponding less than the target exhaust pressure of described compressor
The running frequency of degree and described compressor less than described peak frequency, described control module then operation frequency to described compressor
Rate is adjusted, and is adjusted the described aperture heating restricting element according to the running frequency of the compressor after regulation.
According to one embodiment of present invention, described multiple on-line system is operated in heating mode, main heating mode or main refrigeration mould
Under formula.
Accompanying drawing explanation
Fig. 1 is the structural representation of multiple on-line system according to an embodiment of the invention.
Fig. 2 is the flow chart of the control method heating restricting element in multiple on-line system according to embodiments of the present invention.
Fig. 3 is the flow chart of the control method heating restricting element according to an embodiment of the invention in multiple on-line system.
Reference: off-premises station 10, multiple indoor set 20, part flow arrangement 30, gas-liquid separator 31, First Heat Exchanger 32,
Second heat exchanger 33, first throttle element 34 and heat restricting element 35.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Describe the multiple on-line system proposed according to embodiments of the present invention with reference to the accompanying drawings and heat the control of restricting element
Method.
In an embodiment of the present invention, multiple on-line system includes off-premises station, part flow arrangement and multiple indoor set, and off-premises station includes
Compressor, part flow arrangement includes First Heat Exchanger, the second heat exchanger and heats restricting element, the first heat exchange of First Heat Exchanger
The outlet of stream is connected with the entrance of the first heat exchange stream of the second heat exchanger, going out of the second heat exchange stream of the second heat exchanger
Mouthful it is connected with the entrance of the second heat exchange stream of First Heat Exchanger, heats restricting element and be arranged on the first of the second heat exchanger and change
Between the entrance of the outlet of hot flowpath and the second heat exchange stream of the second heat exchanger.
Specifically, as it is shown in figure 1, multiple on-line system includes off-premises station 10, multiple indoor set 20, part flow arrangement 30,
Wherein, off-premises station 10 includes compressor (not specifically illustrated in figure), part flow arrangement 30 include gas-liquid separator 31,
First Heat Exchanger the 32, second heat exchanger 33, first throttle element 34 and heat restricting element 35.
First end of gas-liquid separator 31 is connected with one end of off-premises station 10.Second end of gas-liquid separator 31 and first
The entrance of the first heat exchange stream of heat exchanger 32 is connected, and first throttle element 34 is arranged on the of First Heat Exchanger 32
Between the entrance of the outlet of one heat exchange stream and the first heat exchange stream of the second heat exchanger 33.Heat restricting element 35 to set
Put the first heat exchange stream at the second heat exchanger 33 outlet and the second heat exchange stream of the second heat exchanger 33 entrance it
Between, the entrance phase of the outlet of the second heat exchange stream of the second heat exchanger 33 and the second heat exchange stream of First Heat Exchanger 32
Connection, the outlet of the second heat exchange stream of First Heat Exchanger 32 respectively with the other end of off-premises station 10 and the indoor set that freezes
One end be connected.The outlet of the other end of refrigeration indoor set and the first heat exchange stream of the second heat exchanger 33 is connected,
3rd end of gas-liquid separator 31 is connected with the one end heating indoor set, heats the other end and second heat exchange of indoor set
The entrance of the first heat exchange stream of device 33 is connected.Wherein, first throttle element and to heat restricting element can be electronics
Expansion valve, First Heat Exchanger and the second heat exchanger can be plate type heat exchanger.
When multiple on-line system heats (including that multiple on-line system is run with heating mode, main heating mode or main refrigeration mode),
Especially sub-load heats down, if the aperture heating restricting element is the least, then will cause the import and export pressure heating indoor set
Difference (i.e. pressure difference value Δ P=Ps1-Ps2 between the high-pressure Ps1 and middle pressure pressure Ps2 of part flow arrangement) diminishes, and enters
The refrigerant flow and the flow velocity that enter to heat indoor set all can reduce, now owing to heating the indoor temperature residing for indoor set the most relatively
Low, chance generation liquid storage in heating chamber, the leaving air temp heating indoor set will reduce, thus cause heating capacity to be decayed,
It is thus desirable to take measures to drain heating liquid unnecessary in indoor set.Meanwhile, less inlet outlet pressure differential not only can cause
Heat indoor set degree of supercooling too big, and before causing the valve heating restricting element degree of supercooling SCm2=Tps2-Tm2 is (wherein,
Tps2 is the saturation temperature that the middle pressure pressure value of part flow arrangement is corresponding, i.e. heats corresponding saturated of the upstream pressure value of restricting element
Temperature, Tm2 is temperature value before the valve heating restricting element) the highest.
And if it is too big to heat the aperture of restricting element, then the inlet outlet pressure differential heating indoor set will be caused to become big, entrance heats
The refrigerant flow of indoor set and flow velocity all can increase, although now heat indoor set and liquid storage is less likely to occur, but can cause system
The outlet subcooling of hot indoor set is the least, and before heating the valve of restricting element, degree of supercooling SCm2 is the least, it is possible to have gas before there is valve
Body, causes system unstable.Meanwhile, the aperture heating restricting element will also result in the most greatly the running frequency rising of compressor,
System energy efficiency reduces, and high pressure likely rises to get on, and the discharge superheat of compressor ratio sometimes is relatively low.
If heating under conditions of indoor set do not occurs hydrops, the aperture heating restricting element is smaller, now compressor
Discharge superheat can be higher, and high pressure is the highest, and the running frequency ratio of compressor is relatively low, and system energy efficiency can be the highest.But
If it is considered that regulating the aperture heating restricting element according only to the target exhaust degree of superheat of compressor, in some operating mode
Under (such as sub-load heats down), the running frequency ratio of compressor is relatively low, and the refrigerant flow of system is the least, and
The discharge superheat of compressor is the highest, now due to the discharge superheat miss the mark discharge superheat of compressor,
Then the aperture heating restricting element will be made to continue to turn down, so that the hydrops heating indoor set is more serious.Due to
SR is big, and the pressure at expulsion of compressor is big, and the running frequency of compressor will not raise again, and system work will be more
Add abnormal, endless loop can be absorbed in.Therefore, it can to heat throttling unit in the target exhaust degree of superheat according to compressor
The aperture of part turns down to time to a certain degree, by controlling the high-pressure Ps1 and middle pressure pressure Ps2 of rational part flow arrangement
Between pressure pressure differential deltap P=Ps1-Ps2 make system can meet discharge opeing requirement, can have again and well heat and energy
Effect performance.
Fig. 2 is the flow chart of the control method heating restricting element in multiple on-line system according to embodiments of the present invention.Such as Fig. 2
Shown in, the control method heating restricting element in this multiple on-line system comprises the following steps:
S1, obtains the target exhaust pressure of compressor or the saturation temperature that target exhaust pressure is corresponding.
S2, is controlled such that compression according to the saturation temperature that target exhaust pressure or target exhaust pressure are corresponding to compressor
Machine stable operation, and after compressor stable operation, obtain the current exhaust degree of superheat of compressor.
Specifically, when multiple on-line system is run with heating mode, main heating mode or main refrigeration mode, by being arranged on pressure
The pressure transducer of the exhaust ports of contracting machine obtains pressure at expulsion Pc of compressor in real time, or is getting the aerofluxus of compressor
After pressure Pc, obtain, according to pressure at expulsion Pc, saturation temperature Tc that pressure at expulsion is corresponding.Then, according to the aerofluxus of compressor
Pressure Pc (or pressure at expulsion corresponding saturation temperature Tc) and target exhaust pressure Pcs (or target exhaust pressure is corresponding
Saturation temperature Tcs) between difference the running frequency of compressor is carried out PI (Proportional Integral, ratio
Integration) regulation, with after compressor stable operation, it is thus achieved that pressure at expulsion Pc of new compressor (or pressure at expulsion is corresponding
Saturation temperature Tc), the discharge superheat DSH of compressor and the high-pressure Ps1 of part flow arrangement and middle pressure pressure Ps2.
Wherein, high-pressure Ps1 can be by being arranged on the pressure in the exit of the first heat exchange stream of the First Heat Exchanger of part flow arrangement
Sensor detection obtains, and middle pressure pressure Ps2 can be by being arranged on the pressure of the porch of the first heat exchange stream of the second heat exchanger
Sensor detection obtains.
S3, obtains the target exhaust degree of superheat of compressor, and judges that whether the current exhaust degree of superheat is less than the target exhaust degree of superheat.
S4, if the current exhaust degree of superheat is less than the target exhaust degree of superheat, then carries out aperture and turns control down heating restricting element,
Until difference between the high-pressure of part flow arrangement and middle pressure pressure less than the first preset value or receives and heats indoor set
During hydrops signal, forbid turning down the aperture heating restricting element.
According to one embodiment of present invention, if the current exhaust degree of superheat is more than the target exhaust degree of superheat, then to heating throttling
Element carries out aperture and tunes up control.
Specifically, in pressure at expulsion Pc that compressor is controlled obtaining new compressor, (or pressure at expulsion is corresponding
Saturation temperature Tc), on the premise of the discharge superheat DSH and high-pressure Ps1 of compressor and middle pressure pressure Ps2,
Heat restricting element and carry out PI from current aperture, discharge superheat DSH and target exhaust degree of superheat DSHm according to compressor
Regulation.If DSH ＜ DSHm, then the aperture heating restricting element turns down, now compressor pressure at expulsion Pc (or
Saturation temperature Tc that person's pressure at expulsion is corresponding) rise, the discharge superheat DSH of compressor rises.
But, in order to ensure that the minimum flow heating restricting element will not make to heat indoor set generation hydrops, need each time
When turning down the aperture heating restricting element, it is judged that difference DELTA P between the high-pressure Ps1 and middle pressure pressure Ps2 of part flow arrangement
Whether less than the first preset value A, (this value is generally the part flow arrangement in the case of system not hydrops obtained by experimental verification
High-pressure and middle pressure pressure between less pressure difference value), or judge whether to receive the hydrops letter heating indoor set
Number.If Δ P ＜ A or heat indoor set and receive hydrops signal, then it is assumed that can not continue to turn down to heat restricting element
Aperture, it should ensure have discharge superheat in the case of, even if discharge superheat miss the mark discharge superheat,
It is also required to stop continuing to turn down the aperture heating restricting element；If Δ P ＞ A, then carry out aperture tune to heating restricting element
Big controlling, now pressure at expulsion Pc (or pressure at expulsion corresponding saturation temperature Tc) of compressor declines, the row of compressor
Gas degree of superheat DSH declines.
According to one embodiment of present invention, after the aperture heating restricting element is adjusted, also include: judge current
Whether discharge superheat is equal to the target exhaust degree of superheat, and judges saturation temperature that the current exhaust pressure of compressor is corresponding whether
The saturation temperature corresponding more than or equal to the target exhaust pressure of compressor, and judge whether the running frequency of compressor is more than
In peak frequency；If the current exhaust degree of superheat is equal to the target exhaust degree of superheat, or the current exhaust pressure of compressor is corresponding
The saturation temperature saturation temperature corresponding more than or equal to the target exhaust pressure of compressor, or the running frequency of compressor is more than
Equal to peak frequency, then the aperture heating restricting element keeps constant.
If the current exhaust degree of superheat is not equal to the saturation temperature corresponding to current exhaust pressure of the target exhaust degree of superheat, compressor
The saturation temperature corresponding less than the target exhaust pressure of compressor and the running frequency of compressor are less than peak frequency, then to pressure
The running frequency of contracting machine is adjusted, and carries out, according to the running frequency of the compressor after regulation, the aperture heating restricting element
Regulation.
Specifically, after the aperture heating restricting element is adjusted, DSH=DSHm, and Pc >=Pcs are further determined whether
Frequency expired by (or Tc >=Tcs) or compressor.If DSH=DSHm, or DSH ≠ DSHm but Pc >=Pcs (or
Person Tc >=Tcs), or DSH ≠ DSHm but compressor expired frequency, then and the aperture holding heating restricting element is constant；
Otherwise, first adjust the running frequency of compressor, and readjust the aperture heating restricting element, until meeting above-mentioned condition,
Showing that system has reached steady statue, the aperture heating restricting element can be stablized under this aperture.Effectively prevent system
When heating, during the aperture heating restricting element is adjusted by the target exhaust degree of superheat according to compressor, in order to
Obtaining higher discharge superheat and excessively turn down the aperture that heats restricting element, cause system heats indoor set generation hydrops,
System high pressure is high, and the running frequency of compressor is relatively low and not raising frequency, and the discharge superheat of compressor cannot raise and enter and extremely follow
The problem of ring, thus ensure system under heating, especially sub-load heats down, and the performance of system and efficiency can reach
More preferably.
In order to make those skilled in the art more clearly understand, the present invention, Fig. 3 are the multi-connected machines according to one concrete example of the present invention
System heats the flow chart of the control method of restricting element.
As it is shown on figure 3, the control method heating restricting element in multiple on-line system can comprise the following steps that
S101, heats the current aperture of restricting element.
S102, the running frequency of compressor is according to pressure at expulsion Pc of compressor (or pressure at expulsion corresponding saturation temperature Tc)
PI regulation is carried out with the difference between target exhaust pressure Pcs (or target exhaust pressure corresponding saturation temperature Tcs), with
Obtain new pressure at expulsion Pc (or pressure at expulsion corresponding saturation temperature Tc), the discharge superheat DSH of compressor, shunting
The high-pressure Ps1 and middle pressure pressure Ps2 of device.
S103, according to the relation between discharge superheat DSH and target exhaust degree of superheat DSHm of compressor to heating throttling unit
The aperture of part carries out PI regulation.
S104, if DSH is ＜ DSHm, the most gradually turns down the aperture heating restricting element.
S105, if DSH is ＞ DSHm, the most gradually opens the aperture heating greatly restricting element.
S106, as Δ P ＜ A, or when receiving the hydrops signal heating indoor set, performs step S107.
S107, forbids continuing to turn down the aperture heating restricting element, prevents from heating indoor set hydrops.
S108, it may be judged whether meet DSH=DSHm, and frequency expired by Pc >=Pcs (or Tc >=Tcs) or compressor.If it is,
Perform step S109；If it does not, return step S101.
S10,9, heat restricting element stable at this aperture, system stability.
In sum, multiple on-line system according to embodiments of the present invention heats the control method of restricting element, first obtains pressure
The target exhaust pressure of contracting machine or saturation temperature corresponding to target exhaust pressure, and arrange according to target exhaust pressure or target
The saturation temperature that atmospheric pressure is corresponding is controlled such that compressor stable operation to compressor, and obtains after compressor stable operation
Take the current exhaust degree of superheat of compressor.Then, obtain the target exhaust degree of superheat of compressor, and judge that current exhaust is overheated
Whether degree is less than the target exhaust degree of superheat, if the current exhaust degree of superheat is less than the target exhaust degree of superheat, then to heating throttling unit
Part carries out aperture and turns control down, until the difference between the high-pressure of part flow arrangement and middle pressure pressure less than the first preset value or
When person receives the hydrops signal heating indoor set, forbid turning down the aperture heating restricting element, thus ensure that system has relatively
The high degree of superheat, makes system under heating, and especially sub-load heats down, has better performance and efficiency.
Fig. 1 is the structural representation of multiple on-line system according to an embodiment of the invention.As it is shown in figure 1, multiple on-line system
Including off-premises station 10, multiple indoor set 20, part flow arrangement 30 and control module (in figure not specifically illustrated).
Wherein, off-premises station 10 includes compressor (not specifically illustrated in figure).Part flow arrangement 30 include First Heat Exchanger 32,
Second heat exchanger 33 and heat restricting element 35, the outlet of the first heat exchange stream of First Heat Exchanger 32 and the second heat exchanger 33
The entrance of the first heat exchange stream be connected, the outlet of the second heat exchange stream of the second heat exchanger 33 and First Heat Exchanger 32
The entrance of the second heat exchange stream is connected, and heats restricting element 35 and is arranged on the going out of the first heat exchange stream of the second heat exchanger 33
Between the entrance of the second heat exchange stream of mouth and the second heat exchanger 33.
Control module for obtaining the target exhaust pressure of compressor or the saturation temperature that target exhaust pressure is corresponding, and according to
Target exhaust pressure or saturation temperature corresponding to target exhaust pressure are controlled such that compressor stable operation to compressor,
And after compressor stable operation, obtaining the current exhaust degree of superheat of compressor, control module obtains the target exhaust mistake of compressor
Temperature, and judge whether the current exhaust degree of superheat is less than the target exhaust degree of superheat, if the current exhaust degree of superheat is arranged less than target
The gas degree of superheat, then carry out aperture and turn control down heating restricting element 35, until the high-pressure of part flow arrangement 30 and middle pressure
Difference between pressure, less than the first preset value or when receiving the hydrops signal heating indoor set, is forbidden turning down and is heated throttling
The aperture of element 35.
According to one embodiment of present invention, if the current exhaust degree of superheat is more than the target exhaust degree of superheat, control module is the most right
Heat restricting element 35 to carry out aperture and tune up control.
Specifically, when multiple on-line system heats (including running) with heating mode, main heating mode or main refrigeration mode,
Control module obtains pressure at expulsion Pc of compressor in real time by being arranged on the pressure transducer of the exhaust ports of compressor, or
After getting pressure at expulsion Pc of compressor, obtain, according to pressure at expulsion Pc, saturation temperature Tc that pressure at expulsion is corresponding.So
After, control module is according to pressure at expulsion Pc of compressor (or pressure at expulsion corresponding saturation temperature Tc) and target exhaust pressure
Difference between power Pcs (or target exhaust pressure corresponding saturation temperature Tcs) carries out PI to the running frequency of compressor
Regulation, with after compressor stable operation, it is thus achieved that pressure at expulsion Pc of new compressor (or corresponding saturated of pressure at expulsion
Temperature Tc), the discharge superheat DSH of compressor and the high-pressure Ps1 of part flow arrangement and middle pressure pressure Ps2.Wherein,
High-pressure Ps1 can be by being arranged on the pressure transducer in the exit of the first heat exchange stream of the First Heat Exchanger of part flow arrangement
Detection obtains, and middle pressure pressure Ps2 can be by being arranged on the pressure transducer of the porch of the first heat exchange stream of the second heat exchanger
Detection obtains.
(or pressure at expulsion is corresponding compressor is controlled obtaining pressure at expulsion Pc of new compressor for control module
Saturation temperature Tc), on the premise of the discharge superheat DSH and high-pressure Ps1 of compressor and middle pressure pressure Ps2, control
Molding tuber is according to the discharge superheat DSH of compressor and target exhaust degree of superheat DSHm, to heating restricting element from current aperture
Carry out PI regulation.If DSH is ＜ DSHm, control module then controls to heat the aperture of restricting element and turns down, now compressor
Pressure at expulsion Pc (or pressure at expulsion corresponding saturation temperature Tc) rises, and the discharge superheat DSH of compressor rises.
But, in order to ensure that the minimum flow heating restricting element will not make to heat indoor set generation hydrops, need control module
When turning down the aperture heating restricting element each time, it is judged that between the high-pressure Ps1 and middle pressure pressure Ps2 of part flow arrangement
Difference DELTA P whether less than the first preset value A (this value be generally by experimental verification obtain in system not hydrops situation
Less pressure difference value between high-pressure and the middle pressure pressure of lower part flow arrangement), or judge whether to receive in heating chamber
The hydrops signal of machine.If Δ P ＜ A or heat indoor set and receive hydrops signal, then it is assumed that can not continue to turn down system
The aperture of thermal throttle element, it should in the case of ensureing to have discharge superheat, though discharge superheat miss the mark
Discharge superheat, it is also desirable to stop continuing to turn down the aperture heating restricting element；If Δ P ＞ A, control module is the most right
Heat restricting element to carry out aperture and tune up control, now pressure at expulsion Pc (or the saturated temperature that pressure at expulsion is corresponding of compressor
Degree Tc) decline, the discharge superheat DSH of compressor declines.
According to one embodiment of present invention, after being adjusted the aperture heating restricting element 35, control module also judges
Whether the current exhaust degree of superheat is equal to the target exhaust degree of superheat, and judges the saturation temperature that the current exhaust pressure of compressor is corresponding
The saturation temperature the most corresponding more than or equal to the target exhaust pressure of compressor, and judge that the running frequency of compressor is the biggest
In equal to peak frequency, and in the current exhaust degree of superheat equal to the target exhaust degree of superheat, or the current exhaust pressure of compressor
The saturation temperature that corresponding saturation temperature is corresponding more than or equal to the target exhaust pressure of compressor, or the running frequency of compressor
During more than or equal to peak frequency, the aperture heating restricting element 35 keeps constant.
If the current exhaust degree of superheat is not equal to the saturation temperature corresponding to current exhaust pressure of the target exhaust degree of superheat, compressor
The saturation temperature corresponding less than the target exhaust pressure of compressor and the running frequency of compressor, less than peak frequency, control mould
The running frequency of compressor is then adjusted by block, and according to the running frequency of compressor after regulation to heating restricting element 35
Aperture be adjusted.
Specifically, after being adjusted the aperture heating restricting element 35, control module has further determined whether DSH=DSHm,
And Pc >=Pcs (or Tc >=Tcs) or compressor expired frequency.If DSH=DSHm, or DSH ≠ DSHm but Pc
>=Pcs (or Tc >=Tcs), or DSH ≠ DSHm but compressor expired frequency, and control module then controls to heat throttling unit
The aperture of part 35 keeps constant；Otherwise, first adjust the running frequency of compressor, and readjust and heat restricting element 35
Aperture, until meeting above-mentioned condition, shows that system has reached steady statue, and the aperture heating restricting element 35 can be stablized
Under this aperture.When the system of effectively prevent heats, in the target exhaust degree of superheat according to compressor to heating restricting element
During aperture is adjusted, excessively turns down the aperture heating restricting element in order to obtain higher discharge superheat, lead
Cause system heat indoor set generation hydrops, system high pressure is high, and the running frequency of compressor is relatively low and not raising frequency, compressor
Discharge superheat cannot raise and enter the problem of endless loop, thus ensure system under heating, especially sub-load heats
Under, the performance of system and efficiency can reach more preferable.
Multiple on-line system according to embodiments of the present invention, first control module obtains target exhaust pressure or the target of compressor
The saturation temperature that pressure at expulsion is corresponding, and according to saturation temperature corresponding to target exhaust pressure or target exhaust pressure to compression
Machine is controlled such that compressor stable operation, and obtains the current exhaust degree of superheat of compressor after compressor stable operation.
Then, control module obtains the target exhaust degree of superheat of compressor, and judges that whether the current exhaust degree of superheat is less than target exhaust
The degree of superheat, if the current exhaust degree of superheat is less than the target exhaust degree of superheat, then carries out aperture and turns control down heating restricting element,
Until difference between the high-pressure of part flow arrangement and middle pressure pressure less than the first preset value or receives and heats indoor set
During hydrops signal, forbid turning down the aperture heating restricting element, thus ensure that system has the higher degree of superheat, make system exist
Heating down, especially sub-load heats down, has better performance and efficiency.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment
Being exemplary, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is the most permissible
Above-described embodiment is changed, revises, replaces and modification.
Claims (10)
1. a multiple on-line system heats the control method of restricting element, it is characterised in that described multiple on-line system includes room
Outer machine, part flow arrangement and multiple indoor set, described off-premises station include compressor, described part flow arrangement include First Heat Exchanger,
Second heat exchanger and heat restricting element, the outlet of the first heat exchange stream of described First Heat Exchanger and described second heat exchanger
The entrance of the first heat exchange stream is connected, the outlet of the second heat exchange stream of described second heat exchanger and described First Heat Exchanger
The entrance of the second heat exchange stream is connected, described in heat restricting element and be arranged on the first heat exchange stream of described second heat exchanger
Between the entrance of the second heat exchange stream of outlet and described second heat exchanger, said method comprising the steps of:
Obtain the target exhaust pressure of described compressor or the saturation temperature that described target exhaust pressure is corresponding；
According to the saturation temperature that described target exhaust pressure or described target exhaust pressure are corresponding, described compressor is controlled
So that described compressor stable operation, and after described compressor stable operation, obtain the current exhaust degree of superheat of described compressor；
Obtain the target exhaust degree of superheat of described compressor, and judge whether the described current exhaust degree of superheat arranges less than described target
The gas degree of superheat；And
If the described current exhaust degree of superheat is less than the described target exhaust degree of superheat, then the described restricting element that heats is carried out aperture
Turn control down, until the difference between the high-pressure of described part flow arrangement and middle pressure pressure is less than the first preset value or reception
To when heating the hydrops signal of indoor set, forbid heating described in turning down the aperture of restricting element.
Multiple on-line system the most according to claim 1 heats the control method of restricting element, it is characterised in that if
The described current exhaust degree of superheat is more than the described target exhaust degree of superheat, then carry out the described restricting element that heats aperture and tune up control.
Multiple on-line system the most according to claim 1 and 2 heats the control method of restricting element, it is characterised in that
After the described aperture heating restricting element is adjusted, also include:
Judge whether the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat, and judge that working as of described compressor is front-seat
The saturation temperature that saturation temperature corresponding to atmospheric pressure is the most corresponding more than or equal to the target exhaust pressure of described compressor, and sentence
Whether the running frequency of disconnected described compressor is more than or equal to peak frequency；
If the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat, or the current exhaust pressure of described compressor
The saturation temperature that corresponding saturation temperature is corresponding more than or equal to the target exhaust pressure of described compressor, or described compressor
Running frequency is more than or equal to described peak frequency, then the aperture heating restricting element described in control keeps constant.
Multiple on-line system the most according to claim 3 heats the control method of restricting element, it is characterised in that if
The described current exhaust degree of superheat is not equal to corresponding saturated of current exhaust pressure of the described target exhaust degree of superheat, described compressor
Saturation temperature and the running frequency of described compressor that temperature is corresponding less than the target exhaust pressure of described compressor are less than described
Peak frequency, then be adjusted the running frequency of described compressor, and according to the running frequency of compressor after regulation to institute
State and heat the aperture of restricting element and be adjusted.
5. according to the multiple on-line system according to any one of claim 1-4 heats the control method of restricting element, its feature
Being, described multiple on-line system is operated under heating mode, main heating mode or main refrigeration mode.
6. a multiple on-line system, it is characterised in that including:
Off-premises station, described off-premises station includes compressor；
Multiple indoor sets；
Part flow arrangement, described part flow arrangement includes First Heat Exchanger, the second heat exchanger and heats restricting element, and described first changes
The outlet of the first heat exchange stream of hot device is connected with the entrance of the first heat exchange stream of described second heat exchanger, and described second changes
The outlet of the second heat exchange stream of hot device is connected with the entrance of the second heat exchange stream of described First Heat Exchanger, described in heat joint
Fluid element is arranged on the outlet of the first heat exchange stream of described second heat exchanger and the second heat exchange stream of described second heat exchanger
Between entrance；
Control module, described control module is for obtaining the target exhaust pressure of described compressor or described target exhaust pressure
Corresponding saturation temperature, and according to saturation temperature corresponding to described target exhaust pressure or described target exhaust pressure to described
Compressor is controlled such that described compressor stable operation, and obtains described compressor after described compressor stable operation
The current exhaust degree of superheat, described control module obtains the target exhaust degree of superheat of described compressor, and judges described current exhaust
Whether the degree of superheat is less than the described target exhaust degree of superheat, wherein, if the described current exhaust degree of superheat is less than described target exhaust
The degree of superheat, then carry out aperture turn control down to the described restricting element that heats, until the high-pressure of described part flow arrangement and middle pressure
Difference between pressure less than the first preset value or when receiving the hydrops signal heating indoor set, forbid turning down described in heat
The aperture of restricting element.
Multiple on-line system the most according to claim 6, it is characterised in that if the described current exhaust degree of superheat is more than institute
Stating the target exhaust degree of superheat, described control module then carries out aperture tune up control to the described restricting element that heats.
8. according to the multiple on-line system described in claim 6 or 7, it is characterised in that the described restricting element that heats is being opened
After degree is adjusted, described control module also judges whether the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat,
And judge that saturation temperature that the current exhaust pressure of described compressor is corresponding is whether more than or equal to the target exhaust pressure of described compressor
The saturation temperature that power is corresponding, and judge whether the running frequency of described compressor is more than or equal to peak frequency, and work as described
The front exhaust degree of superheat is equal to the described target exhaust degree of superheat, or the saturation temperature that the current exhaust pressure of described compressor is corresponding
The saturation temperature corresponding more than or equal to the target exhaust pressure of described compressor, or the running frequency of described compressor is more than
When described peak frequency, the aperture heating restricting element described in control keeps constant.
Multiple on-line system the most according to claim 8, it is characterised in that if the described current exhaust degree of superheat is not equal to
The described target exhaust degree of superheat, described compressor saturation temperature corresponding to current exhaust pressure less than the target of described compressor
Saturation temperature and the running frequency of described compressor that pressure at expulsion is corresponding are less than described peak frequency, and described control module is then
The running frequency of described compressor is adjusted, and heats throttling unit according to the running frequency of the compressor after regulation to described
The aperture of part is adjusted.
10., according to heating the control method of restricting element in the multiple on-line system according to any one of claim 6-9, it is special
Levying and be, described multiple on-line system is operated under heating mode, main heating mode or main refrigeration mode.
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| CN107120786B (en) * | 2017-04-12 | 2019-11-05 | 广东美的暖通设备有限公司 | The control method and device of interior machine restricting element in air conditioner and air conditioner |
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| CN108278713A (en) * | 2018-01-19 | 2018-07-13 | 珠海格力电器股份有限公司 | A kind of compress control method and device |
| CN111207501A (en) * | 2020-01-16 | 2020-05-29 | 广东美的暖通设备有限公司 | Air conditioner control method and system and air conditioner |
| CN111780370A (en) * | 2020-07-03 | 2020-10-16 | 海信（山东）空调有限公司 | Air conditioner and control method of electronic expansion valve |
| CN111780370B (en) * | 2020-07-03 | 2021-08-03 | 海信（山东）空调有限公司 | Air conditioner and control method of electronic expansion valve |
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| CN112944514B (en) * | 2021-02-25 | 2023-08-15 | 青岛海尔空调电子有限公司 | Heat pump air conditioner unit and control method thereof |
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| CN114484738A (en) * | 2022-01-11 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing liquid accumulation of air conditioner and air conditioner |
| CN114484738B (en) * | 2022-01-11 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing liquid accumulation of air conditioner and air conditioner |
| CN114484953A (en) * | 2022-02-07 | 2022-05-13 | 青岛海尔空调电子有限公司 | Heat pump unit and control method thereof |
| WO2024012144A1 (en) * | 2022-07-13 | 2024-01-18 | 广东美的制冷设备有限公司 | Control method and device for multi-split system, multi-split system, and storage medium |
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