CN106766326B - Multi-line system and its refrigeration in press restricting element control method - Google Patents
Multi-line system and its refrigeration in press restricting element control method Download PDFInfo
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- CN106766326B CN106766326B CN201611061758.1A CN201611061758A CN106766326B CN 106766326 B CN106766326 B CN 106766326B CN 201611061758 A CN201611061758 A CN 201611061758A CN 106766326 B CN106766326 B CN 106766326B
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of multi-line system and its refrigeration in press restricting element control method, it the described method comprises the following steps: during multi-line system is run with main refrigeration mode, when receiving function power shortage signal in refrigeration, pressure value in the target of part flow arrangement is carried out tuning up control；When receiving function power shortage signal in heating and not receiving function power shortage signal in refrigeration, pressure value in the target of part flow arrangement is carried out turning control down；Restricting element is pressed to control in refrigeration according to pressure value in the target after adjusting.This method preferentially adjusts pressure value in the target of part flow arrangement according to the capabilities might of machine in freezing, and restricting element is pressed to control in refrigeration according to pressure value in target, to effectively avoid under main refrigeration mode, press the aperture of restricting element too small in refrigeration, cause high-pressure and low-pressure too low, and then lead to the unable problem of machine in cooling and warming, improve the stability of system.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to the control of restricting element is pressed in a kind of multi-line system in refrigeration
Method and a kind of multi-line system.
Background technique
In the building air handling system using multi-couple unit air conditioning system, it often will appear existing cooling load,
There is the case where heating load, even if also having the demand for carrying out refrigeration operation in cold winter.For example, center portion is divided under construction
Meeting room, since surrounding is heating room, the temperature of meeting room is higher, and when personnel increase suddenly, temperature is easy to
It rises to generate cooling load.In the air handling system of this cooling and warming mode mixture operation, the operation shape of outdoor unit
State is divided into main refrigeration mode and two kinds of main heating mode.If first there is cooling load in indoor, the operation mode of outdoor unit is pure system
Cold mode, at this time if there are heating needs in indoor, the operation mode of outdoor unit switchs to main refrigeration mode, and according to practical system
System state judges whether to need to convert as main heating mode.
When system is run with main refrigeration mode and outdoor environment temperature is lower, since outdoor heat exchanger heat dissipation is excessively strong
It is strong, cause high pressure very low, heats interior machine scarce capacity, pressure electric expansion valve and supercooling electric expansion valve gradually turn down in refrigeration,
Low pressure decline, reduces, system circulation coolant quantity is few, causes in refrigeration by the running frequency of the compressor of target of low voltage control
Machine scarce capacity, the interior machine that freezes are run with interior machine long-time impotentia is heated, and outdoor unit can not switch to main heating mode.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide the controlling parties for pressing restricting element in a kind of multi-line system in refrigeration
Method, this method preferentially adjust pressure value in the target of part flow arrangement according to the capabilities might of machine in freezing, and according to pressure value in target
It presses restricting element to control in refrigeration, to effectively avoid under main refrigeration mode, the aperture mistake of restricting element is pressed in refrigeration
It is small, cause high-pressure and low-pressure too low, and then lead to the unable problem of machine in cooling and warming, improves the stability of system.
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 proposes in a kind of multi-line system pressure throttling member in refrigeration
The control method of part, the multi-line system include outdoor unit, part flow arrangement and multiple indoor units, and the part flow arrangement includes system
Cold middle pressure restricting element, the control method is the following steps are included: the mistake run in the multi-line system with main refrigeration mode
Cheng Zhong judges whether to receive function power shortage signal in refrigeration and heats interior function power shortage signal；When receiving the system
When cold interior function power shortage signal, pressure value in the target of the part flow arrangement is carried out tuning up control；When receiving the heating
Interior function power shortage signal and when not receiving function power shortage signal in the refrigeration, to being pressed in the target of the part flow arrangement
Value carries out turning control down；And restricting element is pressed to control in the refrigeration according to pressure value in the target after adjusting.
The control method for pressing restricting element in multi-line system according to an embodiment of the present invention in refrigeration, in multi-line system
During with the operation of main refrigeration mode, if function power shortage signal in refrigeration is received, in the target of part flow arrangement
Pressure value carries out tuning up control；If receiving function power shortage signal in heating and not receiving machine scarce capacity letter in refrigeration
Number, then pressure value in the target of part flow arrangement is carried out turning control down, then according to pressure value in the target after adjusting to pressing in refrigeration
Restricting element is controlled.This method preferentially adjusts pressure value in the target of part flow arrangement according to the capabilities might of machine in freezing, and
It presses restricting element to control in refrigeration according to pressure value in target, to effectively avoid under main refrigeration mode, section is pressed in refrigeration
The aperture of fluid element is too small, causes high-pressure and low-pressure too low, and then leads to the unable problem of machine in cooling and warming, improves and is
The stability of system.
According to one embodiment of present invention, pressure value carries out tuning up control in the target to the part flow arrangement, packet
It includes: pressure value in the target of the part flow arrangement being increased into the first preset value every the first preset time.
According to one embodiment of present invention, pressure value carries out turning control down in the target to the part flow arrangement, packet
It includes: pressure value in the target of the part flow arrangement being reduced into the second preset value every the second preset time.
According to one embodiment of present invention, pressure value is first to pressure throttling in the refrigeration in the target according to after adjusting
Part is controlled, comprising: obtains the middle pressure pressure of the part flow arrangement and the low pressure of the part flow arrangement, and in described
Pressure difference value between pressure pressure and the low pressure is judged；If between medium pressure pressure and the low pressure
Pressure difference value be less than difference between pressure value and third preset value in the target after the adjusting, then save to being pressed in the refrigeration
Fluid element carries out aperture and tunes up control；If the pressure difference value between medium pressure pressure and the low pressure is greater than the tune
The sum of pressure value and the third preset value in target after section then carry out aperture to pressure restricting element in the refrigeration and turn control down
System.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of multi-line system, comprising: outdoor unit；
Part flow arrangement, the part flow arrangement include pressing restricting element in refrigeration；Multiple indoor units；Control module, the control module are used
During the multi-line system is run with main refrigeration mode, judging whether to receive function power shortage signal in refrigeration
With heat in function power shortage signal, and when receiving function power shortage signal in the refrigeration, to the part flow arrangement
Pressure value carries out tuning up control in target, and is receiving function power shortage signal in the heating and do not receiving the refrigeration
When interior function power shortage signal, pressure value in the target of the part flow arrangement is carried out turning control down, and according to the mesh after adjusting
Pressure value presses restricting element to control in the refrigeration in mark.
Multi-line system according to an embodiment of the present invention, during multi-line system is run with main refrigeration mode, control
Molding block receive freeze in function power shortage signal when, tune up control to pressure value in the target of part flow arrangement, and
When receiving function power shortage signal in heating and not receiving function power shortage signal in refrigeration, in the target of part flow arrangement
Pressure value carries out turning control down, then presses restricting element to control in refrigeration according to pressure value in the target after adjusting.The system
Pressure value in the target of part flow arrangement is preferentially adjusted according to the capabilities might of machine in freezing, and according to pressure value in target to pressing in refrigeration
Restricting element is controlled, to effectively avoid under main refrigeration mode, is pressed the aperture of restricting element too small in refrigeration, is led to high pressure
Low pressure is too low, and then leads to the unable problem of machine in cooling and warming, improves the stability of system.
According to one embodiment of present invention, the control module tunes up pressure value in the target of the part flow arrangement
When control, wherein pressure value in the target of the part flow arrangement is increased first in advance every the first preset time by the control module
If value.
According to one embodiment of present invention, the control module turns pressure value in the target of the part flow arrangement down
When control, wherein pressure value in the target of the part flow arrangement is reduced second in advance every the second preset time by the control module
If value.
According to one embodiment of present invention, the control module is according to pressure value in the target after adjusting in the refrigeration
When pressure restricting element is controlled, wherein the control module obtains the middle pressure pressure and shunting dress of the part flow arrangement
The low pressure set, and the pressure difference value between medium pressure pressure and the low pressure is judged；If in described
Pressure difference value between pressure pressure and the low pressure is less than in the target after the adjusting between pressure value and third preset value
Difference, the control module then in the refrigeration press restricting element carry out aperture tune up control；If medium pressure pressure
Pressure difference value between the low pressure is greater than the sum of pressure value and the third preset value, institute in the target after the adjusting
It states control module and then down control is turned to pressure restricting element progress aperture in the refrigeration.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multi-line system according to an embodiment of the invention；And
Fig. 2 is the process for pressing the control method of restricting element in multi-line system according to an embodiment of the present invention in refrigeration
Figure.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Press the controlling party of restricting element in the multi-line system to describe the embodiment of the present invention in refrigeration with reference to the accompanying drawings
Method and multi-line system.
Fig. 1 is the structural schematic diagram of multi-line system according to an embodiment of the invention.As shown in Figure 1, the multi-connected machine
System includes outdoor unit 100, part flow arrangement 200, multiple indoor units 300 and control module 400.
Wherein, outdoor unit 100 may include outdoor heat exchanger 1, four-way valve 2, compressor 3, fluid reservoir 4,5,6,7 and of check valve
8, one end of outdoor heat exchanger 1 is connected with the first end of four-way valve 2, the other end of outdoor heat exchanger 1 respectively with check valve 7 and 8
It is connected, the second end of four-way valve 2 is connected with the exhaust outlet of compressor 3, and the gas returning port of compressor 3 is connected with one end of fluid reservoir 4,
The other end of fluid reservoir 4 is connected with the third end of four-way valve 2, and the 4th end of four-way valve 2 is connected with check valve 5 and 6 respectively.
Part flow arrangement 200 may include heating solenoid valve 9 and 11, refrigeration solenoid valve 10 and 12, gas-liquid separator 13, first change
Restricting element 15, the second heat exchanger 20, supercooling restricting element 21, check valve 16,17,18 and 19, gas-liquid are pressed in hot device 14, refrigeration
The first end of separator 13 is connected with outdoor unit 100, the second end of gas-liquid separator 13 respectively with the phase of heating solenoid valve 9 and 11
Even, the third end of gas-liquid separator 13 is connected with the entrance of the first heat exchange flow path of First Heat Exchanger 14, First Heat Exchanger 14
The entrance phase that the outlet of first heat exchange flow path passes through pressure restricting element 15 in refrigeration and the first heat exchange flow path of the second heat exchanger 20
Even, the entrance of the first heat exchange flow path of the second heat exchanger 20 is also connected with check valve 16 and 18 respectively, and the of the second heat exchanger 20
The outlet of one heat exchange flow path is connected with check valve 17 and 19 respectively, and the outlet of the first heat exchange flow path of the second heat exchanger 20 also passes through
Supercooling restricting element 21 is connected with the entrance of the second heat exchange flow path of the second heat exchanger 20, the second heat exchange stream of the second heat exchanger 20
The outlet on road is connected with the entrance of the second heat exchange flow path of First Heat Exchanger 14, and the second heat exchange flow path of First Heat Exchanger 14 goes out
Mouth is connected with refrigeration solenoid valve 10 and 12 and outdoor unit 100 respectively.Wherein, restricting element 15 and supercooling throttling member are pressed in refrigeration
Part 21 can be electric expansion valve.
Multiple indoor units 300 may include the first indoor unit and the second indoor unit, wherein the first indoor unit may include the first Room
Interior restricting element 22 and the first indoor heat exchanger 24, the second indoor unit may include changing in restricting element 23 and second Room in second Room
Hot device 25.
When multi-line system is run with main refrigeration mode, the high temperature refrigerant being discharged from compressor 3 is through four-way valve 2 in outdoor
After being condensed in heat exchanger 1, enter in gas-liquid separator 13 through check valve 8, wherein high-pressure gaseous refrigerant passes through heating solenoid valve 9
It is sent to machine in heating with 11, high-pressure liquid refrigerant is pre-chilled through First Heat Exchanger 14, and after pressure restricting element 15 throttles in refrigeration,
After converging with the liquid refrigerants for heating interior machine return, the interior machine that freezes is entered after the supercooling of the second heat exchanger 20.
During system is freezed and is heated, part flow arrangement 200 is by pressure restricting element 15 in refrigeration to flowing through
Machine and the coolant quantity for heating interior machine carry out reasonable distribution in freezing, i.e., by controlling the aperture of pressure restricting element 15 in refrigeration, with
Make the pressure (middle pressure pressure Pm2) after pressure restricting element 15 throttles in refrigeration and heating solenoid valve 9 and 11 (high-pressure Pm1)
Pressure difference meets heat in machine demand, meanwhile, so that pressure (middle pressure pressure Pm2) after pressure restricting element 15 throttles in refrigeration with
Machine demand in the pressure difference satisfaction refrigeration of solenoid valve 10 and 12 (low pressure Pm3) of freezing.Wherein, if function power is not in freezing
Foot, then reduce the pressure difference of high-pressure Pm1 Yu middle pressure pressure Pm2；If machine scarce capacity, increases high-pressure in heating
The pressure difference of Pm1 and middle pressure pressure Pm2.
But when outdoor temperature is lower, since the heat dissipation of outdoor heat exchanger 1 is excessively strong, high-pressure Pm1 will be caused
It is very low, interior machine scarce capacity is heated, the pressure difference between high-pressure Pm1 and middle pressure pressure Pm2 needs to increase, and section is pressed in refrigeration
The aperture of fluid element 15 is gradually reduced, and middle pressure pressure Pm2 is reduced, and is subcooled before the valve of restricting element 21 without degree of supercooling, according to supercooling
The aperture of the control logic of restricting element 21, supercooling restricting element 21 can also reduce, to significantly drag down the low pressure pressure of system
Power Pm3, at this point, deep low gear, system refrigerant circulation pole can be dropped to by the running frequency of the compressor 3 of target of low voltage control
It is few, cause the interior machine scarce capacity that freezes, so that machine and machine long-time impotentia in heating are run in freezing, outdoor unit can not be cut
It is changed to main heating mode.
Therefore, in an embodiment of the present invention, the process that control module 400 is run in multi-line system with main refrigeration mode
In, judge whether to receive function power shortage signal in refrigeration and heat interior function power shortage signal, and is receiving in refrigeration
When function power shortage signal, pressure value in the target of part flow arrangement 200 is carried out to tune up control, and heat interior function receiving
Power shortage signal and do not receive refrigeration in function power shortage signal when, pressure value in the target of part flow arrangement 200 is turned down
Control, and press restricting element 15 to control in refrigeration according to pressure value in the target after adjusting.
Wherein, in target pressure value refer to part flow arrangement 200 middle pressure pressure Pm2 and low pressure Pm3 pressure difference needs
The target value reached, i.e., the target value of the pressure difference of pressure pressure Pm2 and low pressure Pm3 is to pressing restricting element in refrigeration in
15 aperture is controlled.
According to one embodiment of present invention, control module 400 carries out tuning up control to pressure value in the target of part flow arrangement 200
When processed, pressure value in the target of part flow arrangement 200 is increased the first preset value every the first preset time by control module 400, wherein
First preset time and the first preset value can be demarcated according to the actual situation.
According to one embodiment of present invention, control module 400 carries out turning control down to pressure value in the target of part flow arrangement 200
When processed, pressure value in the target of part flow arrangement 200 is reduced the second preset value every the second preset time by control module 400, wherein
Second preset time and the second preset value can be demarcated according to the actual situation.
Specifically, pressing the aperture of restricting element 15 to will affect and (press Pm2 in high pressure Pm1-) and (middle pressure Pm2- is low in refrigeration
Press Pm3) relative size, thus influence to freeze interior machine and in heating machine refrigerant distribution condition, and according to refrigeration and heating
Ability need, the adjusting to the aperture for pressing restricting element 15 in refrigeration be it is opposite, therefore, it is necessary to pressing restricting element in refrigeration
15 aperture is rationally controlled.
In order to avoid system because control it is unreasonable caused by system for a long time without heating refrigerating capacity, control module 400 exists
When receiving function power shortage signal in refrigeration, regardless of the effect for heating interior machine, control module 400 is when first is default
Between, pressure value in the target of part flow arrangement 200 is increased into the first preset value, then according to pressure value in the target after adjusting in refrigeration
The aperture of pressure restricting element 15 is adjusted, and to increase the aperture for pressing restricting element 15 in refrigeration, guarantees the refrigeration of machine in freezing
Ability；Machine operates normally (i.e. control module 400 does not receive function power shortage signal in refrigeration) in freeze, and control module
400 receive heating in function power shortage signal when, control module 400 is every the second preset time, by the mesh of part flow arrangement 200
In mark pressure value reduce the second preset value, then according to pressure value in the target after adjusting in refrigeration press restricting element 15 aperture into
Row is adjusted, and with the appropriate aperture for reducing pressure restricting element 15 in refrigeration, guarantees the heating capacity of machine in heating.
Therefore, multi-line system according to an embodiment of the present invention, during system is run with main refrigeration mode, preferentially
Pressure value in the target of part flow arrangement is adjusted according to the capabilities might of machine in freezing, and according to pressure value in the target after adjusting to refrigeration
Middle pressure restricting element is controlled, when freeze in machine operate normally after, further according to heat in machine capabilities might to part flow arrangement
Target in pressure value be adjusted, and according to pressure value in the target after adjusting in refrigeration press restricting element control, to keep away
Exempt under main refrigeration mode, presses the aperture of restricting element too small in refrigeration, cause high-pressure and low-pressure too low, and then cause in cooling and warming
The unable problem of machine, improves the stability of system.
According to one embodiment of present invention, control module 400 saves pressure in refrigeration according to pressure value in the target after adjusting
When fluid element 15 is controlled, wherein the middle pressure pressure Pm2 and part flow arrangement 200 of the acquisition part flow arrangement 200 of control module 400
Low pressure Pm3, and the pressure difference value between centering pressure pressure Pm2 and low pressure Pm3 is judged.If middle pressure pressure
Pressure difference value between Pm2 and low pressure Pm3 is less than the difference in the target after adjusting between pressure value and third preset value, control
Molding block 400 then carries out aperture to pressure restricting element 15 in refrigeration and tunes up control；If middle pressure pressure Pm2 and low pressure Pm3
Between pressure difference value be greater than the sum of pressure value and third preset value in the target after adjusting, control module 400 in refrigeration then to pressing
Restricting element 15 carries out aperture and turns control down.Wherein, third preset value can be demarcated according to the actual situation, for example, third
Preset value can be 0,0.05,0.1 etc..
Specifically, during system is run with main refrigeration mode, when control module 400 receives function in refrigeration
When power shortage signal, regardless of heating interior machine effect, control module 400 will be every the first preset time by pressure value tune in target
Big first preset value, and press the aperture of restricting element 15 to be adjusted in refrigeration according to pressure value Pms in the target after adjusting, such as
Fruit Pm2-Pm3 < Pms-0.05 then gradually tunes up the aperture that restricting element 15 is pressed in refrigeration, so that Pm2-Pm3=Pms；If
Pm2-Pm3 > Pms+0.05 then gradually turns the aperture that restricting element 15 is pressed in refrigeration down, so that Pm2-Pm3=Pms.According to upper
The process of stating repeats, until machine operates normally in freezing.
Interior function power shortage signal is heated when control module 400 receives, but does not receive machine scarce capacity letter in refrigeration
Number when, control module 400 will turn pressure value in target down second preset value every the second preset time, and according to the mesh after adjusting
Pressure value Pms ' presses the aperture of restricting element 15 to be adjusted in refrigeration in mark, if Pms ' -0.05 Pm2-Pl3 <, gradually
The aperture that restricting element 15 is pressed in refrigeration is tuned up, so that Pm2-Pl3=Pms '；If Pm2-Pm3 > Pms '+0.05, gradually
The aperture that restricting element 15 is pressed in refrigeration is turned down, so that Pm2-Pm3=Pms ', executes repeatedly, until machine operates normally in heating.
Therefore, multi-line system according to an embodiment of the present invention, during system is run in a chiller mode, by right
The control of the pressure difference of middle pressure pressure and low pressure, the preferential refrigerating capacity for guaranteeing machine in refrigeration, while according to cooling system
The capabilities might of heating adjusts pressure value in target in real time, precisely to adjust the refrigerant distribution of machine in cooling and warming, avoids main refrigeration
Under mode, presses restricting element aperture too small in refrigeration, it is all very low to cause high-pressure and low pressure, and then lead to cooling and warming
Interior machine while unable problem, improve the stability of system.
Fig. 2 is the process for pressing the control method of restricting element in multi-line system according to an embodiment of the present invention in refrigeration
Figure.In an embodiment of the present invention, multi-line system may include outdoor unit, part flow arrangement and multiple indoor units, wherein shunt dress
Set may include pressing restricting element in refrigeration.
As shown in Fig. 2, pressing the control method of restricting element can comprise the following steps that in refrigeration in the multi-line system
S1 judges whether to receive the interior function power of refrigeration not during multi-line system is run with main refrigeration mode
Function power shortage signal in sufficient signal and heating.
S2 carries out tuning up control when receiving function power shortage signal in refrigeration to pressure value in the target of part flow arrangement.
S3, when receive heat in function power shortage signal and do not receive refrigeration in function power shortage signal when, to point
Pressure value in the target of device is flowed to carry out turning control down.
S4 presses restricting element to control according to pressure value in the target after adjusting in refrigeration.
According to one embodiment of present invention, pressure value in the target of part flow arrangement is carried out tuning up control, comprising: Mei Ge
Pressure value in the target of part flow arrangement is increased the first preset value by one preset time.
According to one embodiment of present invention, pressure value in the target of part flow arrangement is carried out turning control down, comprising: Mei Ge
Pressure value in the target of part flow arrangement is reduced the second preset value by two preset times.
According to one embodiment of present invention, restricting element is pressed to control in refrigeration according to pressure value in the target after adjusting
System, comprising: obtain the middle pressure pressure of part flow arrangement and the low pressure of part flow arrangement, and between centering pressure pressure and low pressure
Pressure difference value judged；If the pressure difference value between middle pressure pressure and low pressure is less than pressure value in the target after adjusting
With the difference between third preset value, then aperture is carried out to pressure restricting element in refrigeration and tune up control；If middle pressure pressure with it is low
Pressure difference value between pressure pressure is greater than the sum of pressure value and third preset value in the target after adjusting, then to pressure throttling member in refrigeration
Part carries out aperture and turns control down.
It should be noted that being pressed in refrigeration in the multi-line system of the embodiment of the present invention in the control method of restricting element not
The details of disclosure please refers to details disclosed in the multi-line system of the embodiment of the present invention, and specific which is not described herein again.
In conclusion the control method of restricting element is pressed in multi-line system according to an embodiment of the present invention in refrigeration,
During multi-line system is run with main refrigeration mode, if receiving function power shortage signal in refrigeration, filled to shunting
Pressure value carries out tuning up control in the target set；If receiving function power shortage signal in heating and not receiving function in refrigeration
Power shortage signal then carries out turning control down to pressure value in the target of part flow arrangement, then according to pressure value pair in the target after adjusting
Restricting element is pressed to be controlled in refrigeration.This method is preferentially adjusted in the target of part flow arrangement according to the capabilities might of machine in freezing
Pressure value, and press restricting element to control in refrigeration according to pressure value in target, to effectively avoid under main refrigeration mode, freeze
The aperture of middle pressure restricting element is too small, causes high-pressure and low-pressure too low, and then lead to the unable problem of machine in cooling and warming, mentions
The high stability of system.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of 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, the meaning of " plurality " is 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 shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly 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 be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.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 can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and 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 not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. pressing the control method of restricting element in a kind of multi-line system in refrigeration, the multi-line system includes outdoor unit, divides
Device and multiple indoor units are flowed, the part flow arrangement includes pressing restricting element in refrigeration, which is characterized in that the control method packet
Include following steps:
During the multi-line system is run with main refrigeration mode, judge whether to receive machine scarce capacity letter in refrigeration
Number and function power shortage signal in heating；
When receiving function power shortage signal in the refrigeration, pressure value in the target of the part flow arrangement is carried out tuning up control
System；
When receiving function power shortage signal in the heating and not receiving function power shortage signal in the refrigeration, to institute
Pressure value in the target of part flow arrangement is stated to carry out turning control down；And
Restricting element is pressed to control in the refrigeration according to pressure value in the target after adjusting.
2. the control method of restricting element is pressed in multi-line system as described in claim 1 in refrigeration, which is characterized in that described
Pressure value in the target of the part flow arrangement is carried out tuning up control, comprising:
Pressure value in the target of the part flow arrangement is increased into the first preset value every the first preset time.
3. the control method of restricting element is pressed in multi-line system as described in claim 1 in refrigeration, which is characterized in that described
Pressure value in the target of the part flow arrangement is carried out turning control down, comprising:
Pressure value in the target of the part flow arrangement is reduced into the second preset value every the second preset time.
4. the control method of restricting element is pressed in multi-line system as claimed in any one of claims 1-3 in refrigeration, it is special
Sign is that pressure value presses restricting element to control in the refrigeration in the target according to after adjusting, comprising:
Obtain the middle pressure pressure of the part flow arrangement and the low pressure of the part flow arrangement, and to medium pressure pressure with it is described
Pressure difference value between low pressure is judged；
If pressure difference value between medium pressure pressure and the low pressure be less than in the target after the adjusting pressure value with
Difference between third preset value then carries out aperture to pressure restricting element in the refrigeration and tunes up control；
If pressure difference value between medium pressure pressure and the low pressure be greater than in the target after the adjusting pressure value with
The sum of described third preset value then carries out aperture to pressure restricting element in the refrigeration and turns control down.
5. a kind of multi-line system, including outdoor unit, part flow arrangement, multiple indoor units and control module, the part flow arrangement packet
It includes in refrigeration and presses restricting element, which is characterized in that
The control module is used for during the multi-line system is run with main refrigeration mode, judges whether to receive system
Function power shortage signal in cold interior function power shortage signal and heating, and receiving function power shortage signal in the refrigeration
When, pressure value in the target of the part flow arrangement is carried out to tune up control, and believe receiving machine scarce capacity in the heating
Number and when not receiving function power shortage signal in the refrigeration, pressure value in the target of the part flow arrangement is carried out turning control down
System, and press restricting element to control in the refrigeration according to pressure value in the target after adjusting.
6. multi-line system as claimed in claim 5, which is characterized in that target of the control module to the part flow arrangement
When middle pressure value carries out tuning up control, wherein
Pressure value in the target of the part flow arrangement is increased the first preset value every the first preset time by the control module.
7. multi-line system as claimed in claim 5, which is characterized in that target of the control module to the part flow arrangement
When middle pressure value carries out turning control down, wherein
Pressure value in the target of the part flow arrangement is reduced the second preset value every the second preset time by the control module.
8. the multi-line system as described in any one of claim 5-7, which is characterized in that after the control module is according to adjusting
Target in pressure value in the refrigeration press restricting element control when, wherein
The control module obtains the middle pressure pressure of the part flow arrangement and the low pressure of the part flow arrangement, and in described
Pressure difference value between pressure pressure and the low pressure is judged；
If pressure difference value between medium pressure pressure and the low pressure be less than in the target after the adjusting pressure value with
Difference between third preset value, the control module then carry out aperture to pressure restricting element in the refrigeration and tune up control；
If pressure difference value between medium pressure pressure and the low pressure be greater than in the target after the adjusting pressure value with
The sum of described third preset value, the control module then carry out aperture to pressure restricting element in the refrigeration and turn control down.
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| CN201611061758.1A CN106766326B (en) | 2016-11-24 | 2016-11-24 | Multi-line system and its refrigeration in press restricting element control method |
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| CN201611061758.1A CN106766326B (en) | 2016-11-24 | 2016-11-24 | Multi-line system and its refrigeration in press restricting element control method |
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| CN110398033B (en) * | 2019-07-09 | 2022-03-15 | 广东美的暖通设备有限公司 | Refrigerant circulation control method and device of heat recovery multi-split system |
| CN111442510B (en) * | 2020-04-08 | 2022-08-23 | 广东美的暖通设备有限公司 | Multi-split air conditioning system, control method and control device thereof, and storage medium |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496505A2 (en) * | 1991-01-10 | 1992-07-29 | Mitsubishi Denki Kabushiki Kaisha | Air-conditioning system |
| CN103261814A (en) * | 2011-01-31 | 2013-08-21 | 三菱电机株式会社 | Air-conditioning device |
| EP2716998A1 (en) * | 2011-05-23 | 2014-04-09 | Mitsubishi Electric Corporation | Air conditioning device |
| CN104011482A (en) * | 2011-11-18 | 2014-08-27 | 三菱电机株式会社 | Air Conditioner |
| CN104748239A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104748261A (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 |
| CN104776630A (en) * | 2015-04-28 | 2015-07-15 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104776635A (en) * | 2015-03-31 | 2015-07-15 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104813117A (en) * | 2012-11-21 | 2015-07-29 | 三菱电机株式会社 | Air-conditioning device |
| CN104833126A (en) * | 2015-03-31 | 2015-08-12 | 广东美的暖通设备有限公司 | Variable refrigerant volume system |
| CN105115198A (en) * | 2015-09-09 | 2015-12-02 | 广东美的暖通设备有限公司 | Multi-on-line system and control method thereof |
| CN105841292A (en) * | 2016-03-23 | 2016-08-10 | 广东美的暖通设备有限公司 | Multi-split air conditioner system and liquid supplement control method thereof |
| CN105928059A (en) * | 2016-04-25 | 2016-09-07 | 广东美的暖通设备有限公司 | Multi-online system and control method for heating and throttling element of multi-online system |
| CN105928266A (en) * | 2016-05-23 | 2016-09-07 | 广东美的暖通设备有限公司 | Multi-online system and control method for heating and throttling element of multi-online system |
| CN106123227A (en) * | 2016-06-28 | 2016-11-16 | 广东美的暖通设备有限公司 | Multiple on-line system and control method thereof |
-
2016
- 2016-11-24 CN CN201611061758.1A patent/CN106766326B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496505A2 (en) * | 1991-01-10 | 1992-07-29 | Mitsubishi Denki Kabushiki Kaisha | Air-conditioning system |
| CN103261814A (en) * | 2011-01-31 | 2013-08-21 | 三菱电机株式会社 | Air-conditioning device |
| EP2716998A1 (en) * | 2011-05-23 | 2014-04-09 | Mitsubishi Electric Corporation | Air conditioning device |
| CN104011482A (en) * | 2011-11-18 | 2014-08-27 | 三菱电机株式会社 | Air Conditioner |
| CN104813117A (en) * | 2012-11-21 | 2015-07-29 | 三菱电机株式会社 | Air-conditioning device |
| CN104833126A (en) * | 2015-03-31 | 2015-08-12 | 广东美的暖通设备有限公司 | Variable refrigerant volume system |
| CN104748239A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104748426A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104748261A (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 |
| CN104776635A (en) * | 2015-03-31 | 2015-07-15 | 广东美的暖通设备有限公司 | Multi-split system |
| CN104776630A (en) * | 2015-04-28 | 2015-07-15 | 广东美的暖通设备有限公司 | Multi-split system |
| CN105115198A (en) * | 2015-09-09 | 2015-12-02 | 广东美的暖通设备有限公司 | Multi-on-line system and control method thereof |
| CN105841292A (en) * | 2016-03-23 | 2016-08-10 | 广东美的暖通设备有限公司 | Multi-split air conditioner system and liquid supplement control method thereof |
| CN105928059A (en) * | 2016-04-25 | 2016-09-07 | 广东美的暖通设备有限公司 | Multi-online system and control method for heating and throttling element of multi-online system |
| CN105928266A (en) * | 2016-05-23 | 2016-09-07 | 广东美的暖通设备有限公司 | Multi-online system and control method for heating and throttling element of multi-online system |
| CN106123227A (en) * | 2016-06-28 | 2016-11-16 | 广东美的暖通设备有限公司 | Multiple on-line system and control method thereof |
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|---|---|
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