CN105698268B - Multi-line system and its control method for heating restricting element - Google Patents
Multi-line system and its control method for heating restricting element Download PDFInfo
- Publication number
- CN105698268B CN105698268B CN201610173447.8A CN201610173447A CN105698268B CN 105698268 B CN105698268 B CN 105698268B CN 201610173447 A CN201610173447 A CN 201610173447A CN 105698268 B CN105698268 B CN 105698268B
- Authority
- CN
- China
- Prior art keywords
- indoor unit
- heating
- restricting element
- degree
- supercooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
-
- 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
- F24F13/24—Means for preventing or suppressing noise
-
- 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
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The invention discloses a kind of multi-line system and its heat restricting element control method, the method includes：Part flow arrangement obtains the operating parameter of each heating indoor unit in open state and the operating parameter of each refrigeration indoor unit in open state in multiple indoor units, and obtains the discharge superheat of compressor and the middle pressure degree of supercooling of heating restricting element；To discharge superheat and middle pressure degree of supercooling in the different weight of the deviation imparting of both direction to obtain the first calculated value and the second calculated value, and calculated in synthesis according to operating parameter, the first calculated value and the second calculated value of the operating parameter of each heating indoor unit, each refrigeration indoor unit and press coefficient；The aperture for heating restricting element is controlled according to the difference between coefficient and predetermined target value is pressed in synthesis.This method not only can be to avoid compressor return air band liquid, but also can take into account the ability and noise problem of heating and the indoor unit that freezes, ensures the reliability of system and the comfort of user.
Description
Technical field
The present invention relates to the control methods that restricting element is heated in air-conditioning technical field more particularly to a kind of multi-line system
And a kind of multi-line system.
Background technology
In air handling system for using multiple system, frequent existing cooling load, and have heating load, even if
Refrigeration demand is also had in winter.Such as the meeting room of Center for Architecture, due to surrounding be heating room and room temperature it is higher,
When the personnel of meeting room increase suddenly, temperature is easy to rise so as to generate cooling load, still, has under such circumstances
The load room of refrigeration demand is usually less, and system totally remains as heating mode of operation.
This cooling and warming mode mixture operation air handling system in, when heating load accounts for it is main when, from compression
After the high pressure gaseous refrigerant that the exhaust outlet of machine comes out condenses in indoor unit is heated, changed respectively in refrigeration indoor unit and outdoor
It is evaporated in hot device.If the cold medium flux control at this time entered in outdoor heat exchanger is bad, it is easy to cause compressor return air
The problems such as band liquid, heating indoor unit hydrops and refrigeration indoor unit capability deficiency and excessive noise, so as to influence the comfortable of user
The reliability of property and system.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of control method of heating restricting element in multi-line system, both can be to avoid compressor return air band
Liquid, and the ability and noise problem of heating and the indoor unit that freezes can be taken into account, so as to ensure relaxing for the reliability of system and user
Adaptive.
It is another object of the present invention to propose a kind of multi-line system.
To achieve the above object, one aspect of the present invention embodiment, which proposes, heats restricting element in a kind of multi-line system
Control method, the multi-line system include outdoor unit, multiple indoor units and part flow arrangement, and the outdoor unit includes outdoor heat exchange
Device and compressor, the heating restricting element are arranged in the part flow arrangement, and the heating restricting element is used for described more
Throttling control is carried out to the refrigerant for entering the outdoor heat exchanger when on-line system is run with main heating mode, the method includes
Following steps：The part flow arrangement obtains the operation ginseng of each heating indoor unit in open state in the multiple indoor unit
The operating parameter of number and each refrigeration indoor unit in open state, and obtain the discharge superheat of the compressor and described
Heat the middle pressure degree of supercooling of restricting element；The discharge superheat and medium pressure degree of supercooling are assigned in the deviation of both direction
Different weights is to obtain the first calculated value and the second calculated value, and according to the fortune of each heating indoor unit in open state
Row parameter, each refrigeration indoor unit in open state operating parameter, first calculated value and the second calculated value calculate
Coefficient is pressed in synthesis；The heating restricting element is opened according to the difference pressed in the synthesis between coefficient and predetermined target value
Degree is controlled.
The control method of restricting element is heated in multi-line system according to embodiments of the present invention, part flow arrangement obtains multiple
The operating parameter of each heating indoor unit in open state and each refrigeration indoor unit in open state in indoor unit
Operating parameter, and obtain compressor discharge superheat and heating restricting element middle pressure degree of supercooling, then to discharge superheat
Degree and middle degree of supercooling is pressed in the different weight of the deviation imparting of both direction to obtain the first calculated value and the second calculated value, and root
Operation according to each operating parameter for heating indoor unit in open state, each refrigeration indoor unit in open state is joined
Number, the first calculated value and the second calculated value calculate it is comprehensive in press coefficient and according to pressed in synthesis coefficient and predetermined target value it
Between difference the aperture for heating restricting element is controlled, not only but also can take into account heating to avoid compressor return air band liquid
And the ability and noise problem of refrigeration indoor unit, so as to ensure the comfort of the reliability of system and user.
According to one embodiment of present invention, the operating parameter of each heating indoor unit in open state includes
It heats the number of indoor unit, heat the aperture of restricting element in indoor unit, the current degree of supercooling for heating indoor unit and target supercooling
Degree, the operating parameter of each refrigeration indoor unit in open state include the number of refrigeration indoor unit, refrigeration indoor unit
Aperture, the refrigeration current degree of superheat of indoor unit and the target superheat degree of middle restricting element.
According to one embodiment of present invention, it is calculated in the synthesis according to the following formula and presses coefficient：
MPC=Σ [(EEVj/240-1)*abs(SCj-SCSj)*Pj]-
Σ[(EEVi/240-1)*abs(SHi-SHSi)*Pi]+
A*[abs(DSH-DSHS)-(DSH-DSHS)+1]*abs(DSH-DSHS)+
B*[abs(SCM-SCMS)-(SCM-SCMS)+1]*abs(SCM-SCMS)
Wherein, MPC is presses coefficient, EEV in the synthesisjFor the aperture of restricting element in heating indoor unit, SCjFor heating
The current degree of supercooling of indoor unit, SCSjTo heat the target degree of supercooling of indoor unit, PjTo heat the number of indoor unit, j is in opening
The number of the heating indoor unit of machine state, EEViFor the aperture of restricting element in refrigeration indoor unit, SHiFor working as refrigeration indoor unit
The preceding degree of superheat, SHSiFor the target superheat degree for the indoor unit that freezes, PiFor the number for the indoor unit that freezes, i is the system in open state
The number of cold indoor unit, DSH are the discharge superheat, and DSHS is the target exhaust degree of superheat, and SCM is medium pressure degree of supercooling,
SCMS is that degree of supercooling is pressed in target, and A and B are weight coefficient.
According to one embodiment of present invention, the middle pressure degree of supercooling of the heating restricting element is calculated according to the following formula
It arrives：
SCM=Tm2-Tps2,
Wherein, SCM is medium pressure degree of supercooling, and Tm2 is the refrigerant temperature of the heating restricting element inlet, Tps2 institutes
State the saturation temperature corresponding to the refrigerant pressure of heating restricting element inlet.
In some embodiments of the invention, it when the multi-line system enters the main heating mode operation, also controls
It makes the heating restricting element and the first preset time is kept with preset initial opening.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of multi-line system, including：Outdoor unit,
The outdoor unit includes outdoor heat exchanger and compressor；Multiple indoor units；Part flow arrangement is equipped with heating section in the part flow arrangement
Fluid element, the heating restricting element are used for when the multi-line system is run with main heating mode to being changed into the outdoor
The refrigerant of hot device carries out throttling control, wherein, the part flow arrangement is in open state for obtaining in the multiple indoor unit
The operating parameter of each heating indoor unit and the operating parameter of each refrigeration indoor unit in open state, and described in obtaining
The discharge superheat of compressor and it is described heating restricting element middle pressure degree of supercooling and to the discharge superheat and it is described in
Pressure degree of supercooling in the deviation of both direction assigns different weight to obtain the first calculated value and the second calculated value, and according in
The operating parameter of each heating indoor unit of open state, the operating parameter of each refrigeration indoor unit in open state, institute
It states the first calculated value and the second calculated value calculates and coefficient pressed in synthesis and according to pressure coefficient and predetermined target value in the synthesis
Between difference to it is described heating restricting element aperture control.
Multi-line system according to embodiments of the present invention is obtained by part flow arrangement and open state is in multiple indoor units
The operating parameter of each heating indoor unit and the operating parameter of each refrigeration indoor unit in open state, and obtain compression
The discharge superheat of machine is with the middle pressure degree of supercooling of heating restricting element and to discharge superheat and middle pressure degree of supercooling two sides
To deviation assign different weight to obtain the first calculated value and the second calculated value, and according to each system in open state
Operating parameter, the first calculated value and the second meter of the operating parameter of hot indoor unit, each refrigeration indoor unit in open state
Calculation value, which calculates, presses coefficient and according to the difference pressed in synthesis between coefficient and predetermined target value to heating restricting element in synthesis
Aperture controlled, not only can to avoid compressor return air band liquid, but also can take into account heating and freeze indoor unit ability and make an uproar
Mail is inscribed, so as to ensure the comfort of the reliability of system and user.
According to one embodiment of present invention, the operating parameter of each heating indoor unit in open state includes
It heats the number of indoor unit, heat the aperture of restricting element in indoor unit, the current degree of supercooling for heating indoor unit and target supercooling
Degree, the operating parameter of each refrigeration indoor unit in open state include the number of refrigeration indoor unit, refrigeration indoor unit
Aperture, the refrigeration current degree of superheat of indoor unit and the target superheat degree of middle restricting element.
According to one embodiment of present invention, the part flow arrangement calculates in the synthesis according to the following formula and presses coefficient：
MPC=Σ [(EEVj/240-1)*abs(SCj-SCSj)*Pj]-
Σ[(EEVi/240-1)*abs(SHi-SHSi)*Pi]+
A*[abs(DSH-DSHS)-(DSH-DSHS)+1]*abs(DSH-DSHS)+
B*[abs(SCM-SCMS)-(SCM-SCMS)+1]*abs(SCM-SCMS)
Wherein, MPC is presses coefficient, EEV in the synthesisjFor the aperture of restricting element in heating indoor unit, SCjFor heating
The current degree of supercooling of indoor unit, SCSjTo heat the target degree of supercooling of indoor unit, PjTo heat the number of indoor unit, j is in opening
The number of the heating indoor unit of machine state, EEViFor the aperture of restricting element in refrigeration indoor unit, SHiFor working as refrigeration indoor unit
The preceding degree of superheat, SHSiFor the target superheat degree for the indoor unit that freezes, PiFor the number for the indoor unit that freezes, i is the system in open state
The number of cold indoor unit, DSH are the discharge superheat, and DSHS is the target exhaust degree of superheat, and SCM is medium pressure degree of supercooling,
SCMS is that degree of supercooling is pressed in target, and A and B are weight coefficient.
According to one embodiment of present invention, the middle pressure degree of supercooling of the heating restricting element is calculated according to the following formula
It arrives：
SCM=Tm2-Tps2,
Wherein, SCM is medium pressure degree of supercooling, and Tm2 is the refrigerant temperature of the heating restricting element inlet, Tps2 institutes
State the saturation temperature corresponding to the refrigerant pressure of heating restricting element inlet.
In some embodiments of the invention, it is described when the multi-line system enters the main heating mode operation
Part flow arrangement also controls the heating restricting element to keep the first preset time with preset initial opening.
Description of the drawings
Fig. 1 is the flow chart for the control method that restricting element is heated in multi-line system according to embodiments of the present invention.
Fig. 2 is the structure diagram of multi-line system according to an embodiment of the invention.
Reference numeral：4, four outdoor heat exchanger 1, four-way valve 2, compressor 3, outer machine gas-liquid separator check valves 5,6,7
With 15, four 8, four solenoid valves 9,10,11 and 12, gas-liquid separator 13, First Heat Exchanger 14, electric expansion valve check valves
16th, the 17,18 and 19, second heat exchanger 20, heating restricting element 21.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come describe in the multi-line system proposed according to embodiments of the present invention heat restricting element control
Method and multi-line system processed.
Fig. 1 is the flow chart for the control method that restricting element is heated in multi-line system according to embodiments of the present invention.Its
In, multi-line system includes outdoor unit, multiple indoor units and part flow arrangement, and outdoor unit includes outdoor heat exchanger and compressor, system
Thermal center fluid element is arranged in part flow arrangement, heating restricting element be used for when multi-line system is run with main heating mode into
The refrigerant for entering outdoor heat exchanger carries out throttling control.
Specifically, as shown in Fig. 2, in multi-line system, outdoor unit includes outdoor heat exchanger 1, four-way valve 2, compressor
3rd, outer machine gas-liquid separator 4 and four check valves 5,6,7 and 8, wherein, compressor 3 has exhaust outlet and gas returning port, compressor
3 exhaust outlet is connected with the first valve port of four-way valve 2, and the gas returning port of compressor 3 is connected with one end of outer machine gas-liquid separator 4,
The other end of outer machine gas-liquid separator 4 is connected with the second valve port of four-way valve 2, and the of one end of outdoor heat exchanger 1 and four-way valve 2
Three valve ports are connected, and the entrance of the other end of outdoor heat exchanger 1 respectively with the outlet of check valve 7 and check valve 8 is connected, four-way valve 2
Entrance of the 4th valve port respectively with the outlet of check valve 5 and check valve 6 be connected.
Part flow arrangement includes gas-liquid separator 13, First Heat Exchanger 14, the second heat exchanger 20, electric expansion valve 15, heating
21, four solenoid valves 9,10,11 and 12 of restricting element and four check valves 16,17,18 and 19.Wherein, 14 He of First Heat Exchanger
Second heat exchanger 20 can be plate heat exchanger, and electric expansion valve 15 is connected to going out for the first heat exchange flow path of First Heat Exchanger 14
Mouthful and the second heat exchanger 20 the first heat exchange flow path entrance between, heating restricting element 21 is connected to the of the second heat exchanger 20
Between the entrance of the outlet of one heat exchange flow path and the second heat exchange flow path of the second heat exchanger 20, heating restricting element 21 can be electricity
Sub- expansion valve.Part flow arrangement passes through four solenoid valves 9,10,11 and 12 and four check valves 16,17,18 and 19 and multiple interiors
Machine is (not specifically illustrated in figure) to be connected.
When multi-line system is run with main heating mode, the high pressure gaseous come out from the exhaust outlet of compressor 3 is cold
Matchmaker enters gas-liquid separator 13 by four-way valve 2 and check valve 6, enters heating indoor unit, system by solenoid valve 9 and solenoid valve 11
The liquid refrigerants of hot indoor unit outlet enters the second heat exchanger 20 by check valve 16 and check valve 18, from the second heat exchanger 20
The refrigerant part that first heat exchange flow path comes out is sent to refrigeration indoor unit through check valve 17 and check valve 19, and another part is through heating
Restricting element 21 evaporates after throttling into outdoor heat exchanger 1.At this point, heating restricting element mainly control it is cold into outdoor heat exchanger
The throttling process of matchmaker, whether aperture influences the return-air of compressor with liquid, and then influences the reliability of compressor, on the other hand makes
The aperture of thermal center fluid element has an effect on the refrigerant pressure (being pressed in i.e.) of heating restricting element inlet, heat so as to influencing to enter and
Degree of supercooling before the cold medium flux of refrigeration indoor unit and refrigeration indoor unit valve.If it is bad to heat restricting element control, very
Compressor return air band liquid is be easy to cause, hydrops or the cold medium shortage and system that pass through the indoor unit that freezes occurs in heating indoor unit
The problem of cold indoor unit noise is big, influences the comfort of user and the reliability of system.Therefore, the embodiment of the present invention proposes
The control method of restricting element is heated in a kind of multi-line system, it, both can be with when multi-line system is run with main heating mode
Ensure that compressor is not in back liquid, and the ability and noise problem of heating and the indoor unit that freezes can be taken into account.
As shown in Figure 1, the control method that restricting element is heated in the multi-line system includes the following steps：
S1, part flow arrangement obtain the operating parameter of each heating indoor unit in open state and place in multiple indoor units
In the operating parameter of each refrigeration indoor unit of open state, and obtain the discharge superheat of compressor and heat restricting element
Middle pressure degree of supercooling.
Wherein, the operating parameter of each heating indoor unit in open state includes the number of heating indoor unit, heating
The aperture of restricting element, the heating current degree of supercooling of indoor unit and target degree of supercooling in indoor unit, in each of open state
The operating parameter of refrigeration indoor unit includes the aperture of restricting element in the number of refrigeration indoor unit, refrigeration indoor unit, in cool room
The current degree of superheat of machine and target superheat degree.
S2 assigns different weights to obtain in terms of first to discharge superheat and middle pressure degree of supercooling in the deviation of both direction
Calculation value and the second calculated value, and each heat the operating parameter of indoor unit, in open state according in open state
Operating parameter, the first calculated value and the second calculated value of each refrigeration indoor unit, which are calculated in synthesis, presses coefficient.
Specifically, it is contemplated that the discharge superheat of compressor and heat restricting element middle pressure degree of supercooling it is less than normal can be to being
The reliability and comfort of system make a big impact, and bigger than normal, will not cause larger shadow to the reliability and comfort of system
It rings, therefore, in an embodiment of the present invention, the middle pressure degree of supercooling of discharge superheat and heating restricting element for compressor
The processing different with progress less than normal bigger than normal, i.e., it is different in the deviation imparting of both direction to discharge superheat and middle pressure degree of supercooling
Weight is to obtain the first calculated value and the second calculated value, then according to the operation ginseng of each heating indoor unit in open state
Number, each refrigeration indoor unit in open state operating parameter, the first calculated value and the second calculated value calculate it is comprehensive in press
Coefficient.
According to one embodiment of present invention, it is calculated in synthesis according to following formula (1) and presses coefficient：
MPC=Σ [(EEVj/240-1)*abs(SCj-SCSj)*Pj]-
Σ[(EEVi/240-1)*abs(SHi-SHSi)*Pi]+
A*[abs(DSH-DSHS)-(DSH-DSHS)+1]*abs(DSH-DSHS)+
B*[abs(SCM-SCMS)-(SCM-SCMS)+1]*abs(SCM-SCMS) (1)
Wherein, MPC is presses coefficient, EEV in synthesisjFor the aperture of restricting element in heating indoor unit, SCjFor in heating chamber
The current degree of supercooling of machine, SCSjTo heat the target degree of supercooling of indoor unit, PjTo heat the number of indoor unit, j is in booting shape
The number of the heating indoor unit of state, EEViFor the aperture of restricting element in refrigeration indoor unit, SHiCurrent mistake for the indoor unit that freezes
Temperature, SHSiFor the target superheat degree for the indoor unit that freezes, PiFor the number for the indoor unit that freezes, i is the cool room in open state
The number of interior machine, DSH are discharge superheat, and DSHS is the target exhaust degree of superheat, and SCM is middle pressure degree of supercooling, and SCMS is in target
Degree of supercooling is pressed, A and B are weight coefficient.
The middle pressure degree of supercooling of heating restricting element can be calculated according to following formula (2)：
SCM=Tm2-Tps2 (2)
Wherein, SCM is middle pressure degree of supercooling, and Tm2 is the refrigerant temperature for heating restricting element inlet, can be by Fig. 2
Temperature sensor T obtain, the saturation temperature corresponding to the refrigerant pressure of Tps2 heatings restricting element inlet can pass through figure
Pressure sensor shown in 2 obtains the refrigerant pressure of heating restricting element inlet, then according to heating restricting element inlet
Refrigerant pressure calculate obtain.
It should be noted that in above-mentioned formula (1), Σ [(EEVj/240-1) * abs (SCj-SCSj) * Pj]-Σ
[(EEVi/240-1) * abs (SHi-SHSi) * Pi] reflects the comprehensive supercooling degree of superheat of multiple indoor units.Due in cool room
The degree of superheat of machine and the degree of supercooling of heating indoor unit it is bigger than normal or it is less than normal can be not interfere with the reliability of system, only influence
The heating of system or refrigerating capacity, therefore carry out simple deviation control.
First calculated value A* [abs (DSH-DSHS)-(DSH-DSHS)+1] * abs (DSH-DSHS) reflect compressor
Return gas carrying liquid situation.If discharge superheat is bigger than normal, heating or the refrigerating capacity of system can be only influenced, and if discharge superheat
Spend less than normal too many, then liquid occurs back for compressor, so as to influence the reliability of system, therefore to discharge superheat in both direction
Deviate and assign different weights.From the formula as can be seen that when discharge superheat is more than the target exhaust degree of superheat, first calculates
It is worth for A* (DSH-DSHS), is the control of simple deviation at this time；When discharge superheat is less than the target exhaust degree of superheat, the first meter
Calculation value is A* [2* (DSHS-DSH)2+ (DSHS-DSH)], occur the quadratic term of deviation at this time, as long as discharge superheat and mesh
It marks the deviation between discharge superheat to increase a bit, large effect will be generated to the first calculated value, so that final
Even if there is discharge superheat situation less than normal in stable state, also can only it is less than normal little by little, avoid the reliability of influence system.
Second calculated value B* [abs (SCM-SCMS)-(SCM-SCMS)+1] * abs (SCM-SCMS) reflect heating throttling
The middle pressure degree of supercooling of element.The middle pressure degree of supercooling for heating restricting element can be bigger than normal, although influencing heating or the system of system at this time
Cold energy power, but influence very little, it is notable that middle pressure degree of supercooling cannot be less than normal, if less than normal, will generate noise,
Fluctuation is easily caused, influences the stability of middle pressure, therefore centering pressure degree of supercooling assigns different weights in the deviation of both direction.
From the formula as can be seen that when pressure degree of supercooling is more than pressure degree of supercooling in target in the middle, the second calculated value is B* (SCM-SCMS), this
When for simple deviation control；When pressure degree of supercooling is less than pressure degree of supercooling in target in the middle, the second calculated value is B* [2* (SCMS-
SCM)2+ (SCMS-SCM)], occur the quadratic term of deviation at this time, as long as in middle pressure degree of supercooling and target between pressure degree of supercooling
Deviation increases a bit, will generate large effect to the second calculated value, even if so that in final stable state appearance
Press degree of supercooling situation less than normal, also can only it is less than normal little by little, avoid the reliability of influence system and the generation of noise.
It is understood that in an embodiment of the present invention, it can also be by other means to discharge superheat and middle pressure
During degree of supercooling carries out different disposal in the deviation of both direction, and combination refrigeration and the operating parameter of heating indoor unit are integrated
Pressure system.Alternatively, it is also possible to which according to pressure coefficient etc. in the directly given synthesis of demand for control, concrete methods of realizing has very much, here
Just no longer it is described in detail.
S3 controls the aperture for heating restricting element according to the difference between coefficient and predetermined target value is pressed in synthesis
System.
According to one embodiment of present invention, when multi-line system enters main heating mode operation, also control heating saves
Fluid element keeps the first preset time with preset initial opening.Wherein, initial opening and the first preset time can be according to realities
Border situation is demarcated.
Specifically, when multi-line system enters main heating mode operation, the initial opening of control heating restricting element
It walks, and is kept for t minutes for K1.Then PI (Proportional Integral, proportional integration) is carried out to heating restricting element to control
System, and predetermined target value (pressing coefficient in target synthesis) is set as MPCS, it is pressed in the synthesis calculated according to above-mentioned formula (1)
Difference between coefficient MPC and predetermined target value MPCS calculates the aperture variation of primary heating restricting element every preset time
Value controls heating restricting element according to aperture changing value.Wherein, if the aperture changing value calculated is walked less than K2,
It builds up to next time, and the aperture changing value of heating restricting element calculated every time is up to K3 steps.
It should be noted that when multi-line system is run with cooling and warming mode mixture, the minimum of restricting element is heated
Aperture is walked for K4, can specifically be set according to actual conditions.
To sum up, the control method of restricting element is heated in the multi-line system of the embodiment of the present invention, presses what is influenced by middle
The problems such as reliability of compressor, the ability of refrigeration and heating indoor unit and refrigeration indoor unit noise, tradeoff was comprehensive joins for one
Number carries out overall merit, and carries out PI controls to heating restricting element for this parameter.Control logic is simple, continuous, can
When can not be taken into account by property, comfort and ability three, it can be effectively prevented by system stabilization in optimum state to each parameter
When carrying out Discrete control, logic is complicated, and control is difficult to continuous and system final stable state and is extremely difficult to optimum state
Problem, and with adaptive ability.
The control method of restricting element is heated in multi-line system according to embodiments of the present invention, part flow arrangement obtains multiple
The operating parameter of each heating indoor unit in open state and each refrigeration indoor unit in open state in indoor unit
Operating parameter, and obtain compressor discharge superheat and heating restricting element middle pressure degree of supercooling, then to discharge superheat
Degree and middle degree of supercooling is pressed in the different weight of the deviation imparting of both direction to obtain the first calculated value and the second calculated value, and root
Operation according to each operating parameter for heating indoor unit in open state, each refrigeration indoor unit in open state is joined
Number, the first calculated value and the second calculated value calculate it is comprehensive in press coefficient and according to pressed in synthesis coefficient and predetermined target value it
Between difference the aperture for heating restricting element is controlled, not only but also can take into account heating to avoid compressor return air band liquid
And the ability and noise problem of refrigeration indoor unit, so as to ensure the comfort of the reliability of system and user.
Fig. 2 is the structure diagram of multi-line system according to an embodiment of the invention.As shown in Fig. 2, multi-connected machine system
System includes：Outdoor unit, multiple indoor units (not specifically illustrated in figure) and part flow arrangement.
Specifically, outdoor unit includes outdoor heat exchanger 1 and compressor 3.Heating restricting element 21, system are equipped in part flow arrangement
Thermal center fluid element 21 is used to throttle to the refrigerant for entering outdoor heat exchanger 1 when multi-line system is run with main heating mode
Control.
Part flow arrangement be used to obtain in multiple indoor units each heating indoor unit in open state operating parameter and
The operating parameter of each refrigeration indoor unit in open state, and obtain the discharge superheat of compressor 1 and heating throttling member
The middle pressure degree of supercooling of part 21 and to discharge superheat and middle pressure degree of supercooling the deviation of both direction assign different weight with
Obtain the first calculated value and the second calculated value, and according to the operating parameter of each heating indoor unit in open state, be in
Operating parameter, the first calculated value and the second calculated value of each refrigeration indoor unit of open state, which are calculated in synthesis, presses coefficient, with
And the aperture of heating restricting element 21 is controlled according to the difference pressed in synthesis between coefficient and predetermined target value.
Wherein, the operating parameter of each heating indoor unit in open state includes the number of heating indoor unit, heating
The aperture of restricting element, the heating current degree of supercooling of indoor unit and target degree of supercooling in indoor unit, in each of open state
The operating parameter of refrigeration indoor unit includes the aperture of restricting element in the number of refrigeration indoor unit, refrigeration indoor unit, in cool room
The current degree of superheat of machine and target superheat degree.
Specifically, it is contemplated that the discharge superheat of compressor 3 and the middle pressure degree of supercooling meeting less than normal for heating restricting element 21
It makes a big impact to the reliability and comfort of system, and it is bigger than normal, the reliability and comfort of system will not be caused larger
It influences, therefore, in an embodiment of the present invention, is pressed through in the discharge superheat and heating restricting element 21 for compressor 3
The processing different with progress less than normal bigger than normal of cold degree assigns discharge superheat and middle pressure degree of supercooling in the deviation of both direction
Different weights is to obtain the first calculated value and the second calculated value, then according to each heating indoor unit in open state
Operating parameter, each refrigeration indoor unit in open state operating parameter, the first calculated value and the second calculated value calculate it is comprehensive
Coefficient is pressed in conjunction.According to one embodiment of present invention, part flow arrangement calculates in synthesis according to above-mentioned formula (1) and presses coefficient, and
The middle pressure degree of supercooling of heating restricting element 21 is calculated according to above-mentioned formula (2).
It should be noted that in above-mentioned formula (1), Σ [(EEVj/240-1) * abs (SCj-SCSj) * Pj]-Σ
[(EEVi/240-1) * abs (SHi-SHSi) * Pi] reflects the comprehensive supercooling degree of superheat of multiple indoor units.Due in cool room
The degree of superheat of machine and the degree of supercooling of heating indoor unit it is bigger than normal or it is less than normal can be not interfere with the reliability of system, only influence
The heating of system or refrigerating capacity, therefore carry out simple deviation control.
First calculated value A* [abs (DSH-DSHS)-(DSH-DSHS)+1] * abs (DSH-DSHS) reflect compressor 3
Return gas carrying liquid situation.If discharge superheat is bigger than normal, heating or the refrigerating capacity of system can be only influenced, and if discharge superheat
Spend less than normal too many, then liquid occurs back for compressor 3, so as to influence the reliability of system, therefore to discharge superheat in both direction
Deviation assign different weight.From the formula as can be seen that when discharge superheat is more than the target exhaust degree of superheat, the first meter
Calculation value is A* (DSH-DSHS), is controlled at this time for simple deviation；When discharge superheat is less than the target exhaust degree of superheat, first
Calculated value is A* [2* (DSHS-DSH)2+ (DSHS-DSH)], occur the quadratic term of deviation at this time, as long as discharge superheat with
Deviation increase between the target exhaust degree of superheat a bit, will generate large effect, so that finally to the first calculated value
Even if stable state there is discharge superheat situation less than normal, also can only it is less than normal little by little, avoid the reliability of influence system.
Second calculated value B* [abs (SCM-SCMS)-(SCM-SCMS)+1] * abs (SCM-SCMS) reflect heating throttling
The middle pressure degree of supercooling of element 21.The middle pressure degree of supercooling for heating restricting element 21 can be bigger than normal, although influencing the heating of system at this time
Or refrigerating capacity, but influencing very little, it is notable that middle pressure degree of supercooling cannot be less than normal, if less than normal, generation is made an uproar
Sound easily causes fluctuation, influences the stability of middle pressure, therefore centering pressure degree of supercooling assigns different power in the deviation of both direction
Weight.From the formula as can be seen that when pressure degree of supercooling is more than pressure degree of supercooling in target in the middle, the second calculated value is B* (SCM-
SCMS), controlled at this time for simple deviation；When pressure degree of supercooling is less than pressure degree of supercooling in target in the middle, the second calculated value is B* [2*
(SCMS-SCM)2+ (SCMS-SCM)], occur the quadratic term of deviation at this time, as long as pressing degree of supercooling in middle pressure degree of supercooling and target
Between deviation increase a bit, will to the second calculated value generate large effect, even if so that final stable state
Degree of supercooling situation less than normal is pressed in appearance, also can only it is less than normal little by little, avoid the reliability of influence system and the generation of noise.
It is understood that in an embodiment of the present invention, it can also be by other means to discharge superheat and middle pressure
During degree of supercooling carries out different disposal in the deviation of both direction, and combination refrigeration and the operating parameter of heating indoor unit are integrated
Pressure system.Alternatively, it is also possible to which according to pressure coefficient etc. in the directly given synthesis of demand for control, concrete methods of realizing has very much, here
Just no longer it is described in detail.
According to one embodiment of present invention, when multi-line system enters main heating mode operation, part flow arrangement is also controlled
System heating restricting element 21 keeps the first preset time with preset initial opening.
Specifically, when multi-line system enters main heating mode operation, initial the opening of control heating restricting element 21
It spends and is walked for K1, and kept for t minutes.Then PI (Proportional Integral, ratio product are carried out to heating restricting element 21
Point) control, and predetermined target value (pressing coefficient in target synthesis) is set as MPCS, it is calculated according to above-mentioned formula (1) comprehensive
The difference between coefficient MPC and predetermined target value MPCS is pressed in conjunction, primary heating restricting element 21 is calculated every preset time
Aperture changing value controls heating restricting element 21 according to aperture changing value.Wherein, if calculate aperture changing value not
Sufficient K2 steps, then build up to next time, and the aperture changing value of heating restricting element 21 calculated every time is up to K3 steps.
It should be noted that when multi-line system is run with cooling and warming mode mixture, the minimum of restricting element is heated
Aperture is walked for K4, can specifically be set according to actual conditions.
To sum up, the multi-line system of the embodiment of the present invention, by reliability, refrigeration and the heating of the influenced compressor of middle pressure
Comprehensive the problems such as ability of indoor unit and refrigeration indoor unit noise tradeoff is a parameter, carries out overall merit, and for this
One parameter carries out PI controls to heating restricting element.Control logic is simple, continuous, reliability, comfort and ability three without
When method is taken into account, it can be effectively prevented by system stabilization in optimum state when carrying out Discrete control to each parameter, logic is multiple
Miscellaneous, control is difficult to the problem of continuous and system final stable state is extremely difficult to optimum state, and has adaptively
Ability.
Multi-line system according to embodiments of the present invention is obtained by part flow arrangement and open state is in multiple indoor units
The operating parameter of each heating indoor unit and the operating parameter of each refrigeration indoor unit in open state, and obtain compression
The discharge superheat of machine is with the middle pressure degree of supercooling of heating restricting element and to discharge superheat and middle pressure degree of supercooling two sides
To deviation assign different weight to obtain the first calculated value and the second calculated value, and according to each system in open state
Operating parameter, the first calculated value and the second meter of the operating parameter of hot indoor unit, each refrigeration indoor unit in open state
Calculation value, which calculates, presses coefficient and according to the difference pressed in synthesis between coefficient and predetermined target value to heating restricting element in synthesis
Aperture controlled, not only can to avoid compressor return air band liquid, but also can take into account heating and freeze indoor unit ability and make an uproar
Mail is inscribed, so as to ensure the comfort of the reliability of system and user.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature right over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. the control method of restricting element is heated in a kind of multi-line system, which is characterized in that the multi-line system includes room
Outer machine, multiple indoor units and part flow arrangement, the outdoor unit include outdoor heat exchanger and compressor, and the heating restricting element is set
Put in the part flow arrangement, it is described heating restricting element be used for when the multi-line system is run with main heating mode into
The refrigerant for entering the outdoor heat exchanger carries out throttling control, the described method comprises the following steps：
The part flow arrangement obtain in the multiple indoor unit the operating parameter of each heating indoor unit in open state and
The operating parameter of each refrigeration indoor unit in open state, and obtain the discharge superheat of the compressor and the heating
The middle pressure degree of supercooling of restricting element；
Different weights is assigned to obtain first in the deviation of both direction to the discharge superheat and medium pressure degree of supercooling
Calculated value and the second calculated value, and each heat the operating parameter of indoor unit, in open state according in open state
Each refrigeration indoor unit operating parameter, first calculated value and the second calculated value calculate it is comprehensive in press coefficient；
The aperture of the heating restricting element is controlled according to the difference pressed in the synthesis between coefficient and predetermined target value
System.
2. the control method of restricting element is heated in multi-line system as described in claim 1, which is characterized in that described to be in
The operating parameter of each heating indoor unit of open state includes restricting element in the number of heating indoor unit, heating indoor unit
Aperture, the heating current degree of supercooling of indoor unit and target degree of supercooling, the fortune of each refrigeration indoor unit in open state
Row parameter includes the aperture of restricting element in the number of refrigeration indoor unit, refrigeration indoor unit, the current degree of superheat for the indoor unit that freezes
With target superheat degree.
3. the control method of restricting element is heated in multi-line system as claimed in claim 2, which is characterized in that according to following
Formula calculates in the synthesis and presses coefficient：
MPC=Σ [(EEVj/240-1)*abs(SCj-SCSj)*Pj]-
Σ[(EEVi/240-1)*abs(SHi-SHSi)*Pi]+
A*[abs(DSH-DSHS)-(DSH-DSHS)+1]*abs(DSH-DSHS)+
B*[abs(SCM-SCMS)-(SCM-SCMS)+1]*abs(SCM-SCMS)
Wherein, MPC is presses coefficient, EEV in the synthesisjFor the aperture of restricting element in heating indoor unit, SCjFor in heating chamber
The current degree of supercooling of machine, SCSjTo heat the target degree of supercooling of indoor unit, PjTo heat the number of indoor unit, j is in booting shape
The number of the heating indoor unit of state, EEViFor the aperture of restricting element in refrigeration indoor unit, SHiCurrent mistake for the indoor unit that freezes
Temperature, SHSiFor the target superheat degree for the indoor unit that freezes, PiFor the number for the indoor unit that freezes, i is the cool room in open state
The number of interior machine, DSH be the discharge superheat, DSHS be the target exhaust degree of superheat, SCM be medium pressure degree of supercooling, SCMS
To press degree of supercooling in target, A and B are weight coefficient.
4. the control method of restricting element is heated in multi-line system as described in claim 1, which is characterized in that the heating
The middle pressure degree of supercooling of restricting element is calculated according to the following formula：
SCM=Tm2-Tps2,
Wherein, SCM is medium pressure degree of supercooling, and Tm2 is the refrigerant temperature of the heating restricting element inlet, is made described in Tps2
The saturation temperature corresponding to refrigerant pressure at thermal throttle element inlet.
5. heating the control method of restricting element in the multi-line system as described in any one of claim 1-4, feature exists
In, when the multi-line system enters the main heating mode operation, also control the heating restricting element with it is preset just
Beginning aperture keeps the first preset time.
6. a kind of multi-line system, which is characterized in that including：
Outdoor unit, the outdoor unit include outdoor heat exchanger and compressor；
Multiple indoor units；
Part flow arrangement, heating restricting element is equipped in the part flow arrangement, and the heating restricting element is used in the multi-connected machine
Throttling control is carried out to the refrigerant for entering the outdoor heat exchanger when system is run with main heating mode, wherein,
The part flow arrangement is used to obtain in the multiple indoor unit the operation ginseng of each heating indoor unit in open state
The operating parameter of number and each refrigeration indoor unit in open state, and obtain the discharge superheat of the compressor and described
Heat restricting element middle pressure degree of supercooling and to the discharge superheat and medium pressure degree of supercooling both direction deviation
Different weights is assigned to obtain the first calculated value and the second calculated value, and according to each heating indoor unit in open state
Operating parameter, each refrigeration indoor unit in open state operating parameter, first calculated value and the second calculated value
It calculates and coefficient is pressed in synthesis and is throttled according to the difference pressed in the synthesis between coefficient and predetermined target value to the heating
The aperture of element is controlled.
7. multi-line system as claimed in claim 6, which is characterized in that each heating indoor unit in open state
Operating parameter include heating indoor unit number, heating indoor unit in restricting element aperture, heat indoor unit current mistake
Cold degree and target degree of supercooling, the operating parameter of each refrigeration indoor unit in open state include of refrigeration indoor unit
Aperture, the refrigeration current degree of superheat of indoor unit and the target superheat degree of restricting element in number, refrigeration indoor unit.
8. multi-line system as claimed in claim 7, which is characterized in that the part flow arrangement is according to calculating the following formula
Coefficient is pressed in synthesis：
MPC=Σ [(EEVj/240-1)*abs(SCj-SCSj)*Pj]-
Σ[(EEVi/240-1)*abs(SHi-SHSi)*Pi]+
A*[abs(DSH-DSHS)-(DSH-DSHS)+1]*abs(DSH-DSHS)+
B*[abs(SCM-SCMS)-(SCM-SCMS)+1]*abs(SCM-SCMS)
Wherein, MPC is presses coefficient, EEV in the synthesisjFor the aperture of restricting element in heating indoor unit, SCjFor in heating chamber
The current degree of supercooling of machine, SCSjTo heat the target degree of supercooling of indoor unit, PjTo heat the number of indoor unit, j is in booting shape
The number of the heating indoor unit of state, EEViFor the aperture of restricting element in refrigeration indoor unit, SHiCurrent mistake for the indoor unit that freezes
Temperature, SHSiFor the target superheat degree for the indoor unit that freezes, PiFor the number for the indoor unit that freezes, i is the cool room in open state
The number of interior machine, DSH be the discharge superheat, DSHS be the target exhaust degree of superheat, SCM be medium pressure degree of supercooling, SCMS
To press degree of supercooling in target, A and B are weight coefficient.
9. multi-line system as claimed in claim 6, which is characterized in that it is described heating restricting element middle pressure degree of supercooling according to
The following formula is calculated：
SCM=Tm2-Tps2,
Wherein, SCM is medium pressure degree of supercooling, and Tm2 is the refrigerant temperature of the heating restricting element inlet, is made described in Tps2
The saturation temperature corresponding to refrigerant pressure at thermal throttle element inlet.
10. the multi-line system as described in any one of claim 6-9, which is characterized in that when the multi-line system enters
During the main heating mode operation, the part flow arrangement also controls the heating restricting element to keep the with preset initial opening
One preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173447.8A CN105698268B (en) | 2016-03-23 | 2016-03-23 | Multi-line system and its control method for heating restricting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173447.8A CN105698268B (en) | 2016-03-23 | 2016-03-23 | Multi-line system and its control method for heating restricting element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105698268A CN105698268A (en) | 2016-06-22 |
| CN105698268B true CN105698268B (en) | 2018-06-29 |
Family
ID=56231803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610173447.8A Active CN105698268B (en) | 2016-03-23 | 2016-03-23 | Multi-line system and its control method for heating restricting element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105698268B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152633B (en) * | 2016-06-28 | 2018-07-10 | 广东美的暖通设备有限公司 | Multi-line system and its control method |
| CN108105912B (en) * | 2017-12-11 | 2019-11-29 | 广东美的暖通设备有限公司 | Multi-line system and its anti-refrigerant bias current control method, control device |
| CN110410967B (en) * | 2019-07-03 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Control method for pipeline noise of multi-split air conditioning system and multi-split air conditioning system |
| CN112443947B (en) * | 2019-08-30 | 2021-11-26 | 青岛海尔空调电子有限公司 | Control method of simultaneous cooling and heating multi-split air conditioning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786602A (en) * | 2004-12-06 | 2006-06-14 | 三星电子株式会社 | Multi-air conditioning system and valve opening controlling method thereof |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104764242A (en) * | 2015-03-31 | 2015-07-08 | 广东美的暖通设备有限公司 | Multi-online system |
| CN105066539A (en) * | 2015-07-16 | 2015-11-18 | 广东美的暖通设备有限公司 | Multiple-on-line system and electronic expansion valve control method thereof |
| CN105115199A (en) * | 2015-07-06 | 2015-12-02 | 广东美的暖通设备有限公司 | VFRVV VRF air conditioning system refrigerant diversion control method and device |
-
2016
- 2016-03-23 CN CN201610173447.8A patent/CN105698268B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786602A (en) * | 2004-12-06 | 2006-06-14 | 三星电子株式会社 | Multi-air conditioning system and valve opening controlling method thereof |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104764242A (en) * | 2015-03-31 | 2015-07-08 | 广东美的暖通设备有限公司 | Multi-online system |
| CN105115199A (en) * | 2015-07-06 | 2015-12-02 | 广东美的暖通设备有限公司 | VFRVV VRF air conditioning system refrigerant diversion control method and device |
| CN105066539A (en) * | 2015-07-16 | 2015-11-18 | 广东美的暖通设备有限公司 | Multiple-on-line system and electronic expansion valve control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105698268A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105066539B (en) | Multi-line system and its control method for electronic expansion valve | |
| CN105698268B (en) | Multi-line system and its control method for heating restricting element | |
| JP4771721B2 (en) | Air conditioner | |
| CN107940826A (en) | Multi-line system and its refrigerant distribution control method and device | |
| CN101960232B (en) | Refrigeration device | |
| CN107559955B (en) | Multi-line system and its low temperature control method | |
| CN107940827A (en) | Multi-line system and its refrigerant distribution control method and device | |
| CN108105912A (en) | Multi-line system and its anti-refrigerant bias current control method, control device | |
| CN103900300B (en) | Air-conditioner and control method thereof | |
| CN106403044B (en) | The determination method of multi-line system and its indoor unit heating capacity | |
| CN104896581B (en) | The control method of air conditioner and air conditioner | |
| CN104976813A (en) | Air conditioner | |
| CN105240957A (en) | Enhanced vapor injection air conditioner system | |
| JP2001280669A (en) | Refrigerating cycle device | |
| CN205102288U (en) | Enhanced vapor injection air conditioning system | |
| CN107477788A (en) | The control method and device of air-conditioning system and its indoor fan | |
| CN106556113B (en) | Multi-line system and its middle pressure restricting element control method | |
| CN107559953A (en) | Multiple on-line system and its control method and device that loop valve body is subcooled | |
| CN111306833A (en) | Double-temperature air conditioning system | |
| CN111306832A (en) | Air conditioner | |
| CN205174907U (en) | Air conditioning system | |
| CN105841292B (en) | Multi-line system and its fluid infusion control method | |
| CN104903662B (en) | Air-conditioning device | |
| CN113375290B (en) | Air conditioner and control method thereof | |
| CN206001761U (en) | A kind of air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |