CN107144054B - Opening degree control method and device of electronic expansion valve - Google Patents
Opening degree control method and device of electronic expansion valve Download PDFInfo
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- CN107144054B CN107144054B CN201710248155.0A CN201710248155A CN107144054B CN 107144054 B CN107144054 B CN 107144054B CN 201710248155 A CN201710248155 A CN 201710248155A CN 107144054 B CN107144054 B CN 107144054B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 6
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 230000008901 benefit Effects 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 41
- 230000035508 accumulation Effects 0.000 description 13
- 238000009825 accumulation Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 238000007667 floating Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method and a device for controlling the opening degree of an electronic expansion valve. Wherein, the method comprises the following steps: acquiring a first temperature parameter and a second temperature parameter, wherein the first temperature parameter is smaller than the second temperature parameter; adjusting the opening degree of an electronic expansion valve of the first internal machine, and controlling the temperature difference parameter to be within a temperature range formed by the first temperature parameter and the second temperature parameter; the temperature difference parameter is the difference between the outlet temperature of the second indoor unit heat exchanger and the outlet temperature of the first indoor unit heat exchanger, the first indoor unit is an indoor unit which is shut down in the multi-split air conditioner, and the second indoor unit is an indoor unit which runs in the multi-split air conditioner. The invention solves the technical problem that the refrigerant is accumulated due to the closing of the electronic expansion valve of the shutdown internal machine in the multi-split air conditioner in the prior art, so that the usable refrigerant in the multi-split air conditioner is reduced.
Description
Technical field
The present invention relates to airconditioning control fields, in particular to the aperture control method and dress of a kind of electric expansion valve
It sets.
Background technique
Currently, heat pump multi-connected machine is widely used, wherein multi-connected machine includes multiple indoor units, and user can be to each
Indoor unit is respectively controlled, for example, each interior machine refers to according to corresponding control respectively when multi-connection operation and heating mode
Order is heated, so that the room temperature of its installation increases.Since the instruction that each indoor unit receives may not be identical,
There can be in multi-connected machine the case where part indoor unit is switched on, and part indoor unit shuts down.
In existing multi-line system, the electric expansion valve of the interior machine of shutdown is to close.Fig. 1 is according to the prior art
A kind of multi-connected machine in machine structural schematic diagram, the room temperature locating for the interior machine 1 and interior machine 2, which has reached, presets temperature,
Out of service, indoor unit n is also in heating operation, at this point, interior machine 1 and the corresponding electric expansion valve 1 of interior machine 2 and electric expansion valve 2
It will close, after electric expansion valve 1 and electric expansion valve 2 are closed, the gaseous coolant in the heat exchanger of interior machine 1 and interior machine 2 can be slow
Slowly it radiates and liquefies, so that connecting leg is longer, and accumulation is more from big valve to a large amount of refrigerants accumulations of interior machine electric expansion valve section pipeline,
To cause workable refrigerant in multi-connected machine to tail off, lead to the reduction of unit heating capacity and the excessively high damage of compressor exhaust temperature
The case where bad compressor.
It is closed for the electric expansion valve of the interior machine to shut down in multi-connected machine in the prior art so that refrigerant accumulation, causes multi-joint
The problem of refrigerant can be used to reduce in machine, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides the aperture control methods and device of a kind of electric expansion valve, at least to solve existing skill
The electric expansion valve of the interior machine to shut down in multi-connected machine in art is closed so that refrigerant accumulation, causes refrigerant to can be used to reduce in multi-connected machine
The technical issues of.
According to an aspect of an embodiment of the present invention, a kind of aperture control method of electric expansion valve is provided, comprising: obtain
Take the first temperature parameter and second temperature parameter, wherein the first temperature parameter is less than second temperature parameter；Machine in adjustment first
Electronic expansion valve opening, control temperature difference parameters are within the temperature range of the first temperature parameter and second temperature parameter composition；Its
In, temperature difference parameters are the difference of the outlet temperature of machine heat exchanger in the outlet temperature and first of machine heat exchanger in second, machine in first
For the interior machine shut down in multi-connected machine, machine is the interior machine run in multi-connected machine in second.
According to another aspect of an embodiment of the present invention, a kind of opening control device of electric expansion valve is additionally provided, comprising:
Module is obtained, for obtaining the first temperature parameter and second temperature parameter, wherein the first temperature parameter is joined less than second temperature
Number；Module is adjusted, for adjust the electronic expansion valve opening of machine in first, temperature difference parameters is controlled and is in the first temperature parameter and the
Within the temperature range of two temperature parameters are constituted；Wherein, temperature difference parameters be second in machine heat exchanger outlet temperature and first in machine
The difference of the outlet temperature of heat exchanger, machine is the interior machine shut down in multi-connected machine in first, in second machine be run in multi-connected machine it is interior
Machine.
Another aspect according to an embodiment of the present invention, additionally provides a kind of storage medium, and storage medium includes the journey of storage
Sequence, wherein equipment where control storage medium executes the aperture control method of above-mentioned electric expansion valve in program operation.
It is according to an embodiment of the present invention in another aspect, additionally providing a kind of processor, which is characterized in that processor is for transporting
Line program, wherein program executes the aperture control method of above-mentioned electric expansion valve when running.
In embodiments of the present invention, the first temperature parameter and second temperature parameter are obtained, the electronics of machine is swollen in adjustment first
Swollen valve opening, control temperature difference parameters are within the temperature range of the first temperature parameter and second temperature parameter composition, wherein the temperature difference
Parameter is the difference of the outlet temperature of machine heat exchanger in the outlet temperature and first of machine heat exchanger in second, and machine is multi-connected machine in first
The interior machine of middle shutdown, machine is the interior machine run in multi-connected machine in second.Above scheme by adjusting electric expansion valve aperture with
Temperature difference parameters are maintained at the first temperature parameter and within the temperature range of second temperature parameter constitutes, so that electric expansion valve
Aperture is that the refrigerant in the interior machine for can guarantee shutdown is no longer accumulated, and solves the electricity of the interior machine to shut down in multi-connected machine in the prior art
Sub- expansion valve is closed so that refrigerant accumulation, leads to the technical issues of refrigerant can be used to reduce in multi-connected machine, further, also can
Keep the heating capacity attenuation degree of multi-connected machine lower, or do not generate decaying, avoids the electric expansion valve due to the interior machine of shutdown
The problem of decaying of multi-connected machine heat-sinking capability caused by opening.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of machine in multi-connected machine according to prior art；
Fig. 2 is the flow chart of the aperture control method of electric expansion valve according to an embodiment of the present invention；And
Fig. 3 is the schematic diagram of the opening control device of electric expansion valve according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of embodiment of the aperture control method of electric expansion valve is provided, needs to illustrate
, step shown in the flowchart of the accompanying drawings can hold in a computer system such as a set of computer executable instructions
Row, although also, logical order is shown in flow charts, and it in some cases, can be to be different from sequence herein
Execute shown or described step.
Fig. 2 is the flow chart of the aperture control method of electric expansion valve according to an embodiment of the present invention, as shown in Fig. 2, should
Method includes the following steps:
Step S202 obtains the first temperature parameter and second temperature parameter, wherein the first temperature parameter is less than second temperature
Parameter.
Specifically, above-mentioned first temperature parameter and second temperature parameter may be constructed for controlling electronic expansion valve opening
Temperature range.Wherein, the first temperature parameter is less than second temperature parameter, i.e. the first temperature parameter can be above-mentioned temperature range
Lower limit value, second temperature parameter can be the upper limit value of above-mentioned temperature range.
Step S204, adjustment first in machine electronic expansion valve opening, control temperature difference parameters be in the first temperature parameter with
Second temperature parameter constitute within the temperature range of, wherein temperature difference parameters be second in machine heat exchanger outlet temperature and first in
The difference of the outlet temperature of machine heat exchanger, machine is the interior machine shut down in multi-connected machine in first, and machine is to run in multi-connected machine in second
Interior machine.
Specifically, the interior machine of above-mentioned shutdown, which can be locating room temperature, reaches the temperature of setting so that out of service is interior
Machine is also possible to the interior machine of the instruction stop according to user.
It is herein it should be noted that when multi-connected machine has machine in more second, i.e., following in multi-connected machine when more interior machine operations
The parameter of machine can be the average value of the parameter of the interior machine of more operations in second.
In an alternative embodiment, as shown in connection with fig. 1, in the multi-line system, interior machine 1 is the interior machine shut down, interior
Machine 2 to interior machine n be operation interior machine, above-mentioned temperature difference parameters be interior machine 2 to interior machine n heat exchanger outlet temperature average value with it is interior
The difference of the heat exchanger outlet temperature of machine 1, when adjusting the electric expansion valve 1 of interior machine 1, temperature difference parameters can generate corresponding change
Change, when in the temperature range that temperature difference parameters are in the first temperature parameter and second temperature parameter is constituted, confirms machine 1 in current
In refrigerant there is circulation, and the heating capacity of multi-connected machine will not be made to generate biggish decaying, therefore can be by adjusting interior machine 1
The aperture of electric expansion valve is in temperature difference parameters within the temperature range of the first temperature parameter and second temperature parameter composition, from
And the refrigerant in interior machine 1 is prevented to accumulate, it also prevents due to the excessive caused multi-joint mechanism of the electronic expansion valve opening of interior machine 1
The deep fades of heat.
Machine needs heating operation in second opened, has a large amount of refrigerants to circulate in heat exchanger, closing first in machine be not necessarily to
Heating is usually circulated without refrigerant in heat exchanger, so as to cause machine heat exchanger in second outlet temperature than first in machine exchange heat
The outlet temperature of device is high.In order to solve the problems, such as in shut down in multi-connected machine first refrigerant accumulation in machine heat exchanger and connecting leg,
The electric expansion valve of the interior machine of shutdown can be opened, but if the aperture of the electric expansion valve for the interior machine shut down is excessive, system is high
Pressure side refrigerant then can be passed to low-pressure side by the electric expansion valve that the interior machine of shutdown is opened, and lead to the heating capacity of multi-connected machine
Decaying, therefore, if temperature difference parameters are excessively high, it is determined that the aperture of electric expansion valve is smaller, may result in refrigerant accumulation, if
Temperature difference parameters are too low, it is determined that the aperture of electric expansion valve is larger, so that the heating capacity of multi-connected machine is decayed.
In conclusion the above embodiments of the present application obtain the first temperature parameter and second temperature parameter, machine in adjustment first
Electronic expansion valve opening, control temperature difference parameters be in the first temperature parameter and second temperature parameter composition within the temperature range of,
Wherein, temperature difference parameters are the difference of the outlet temperature of machine heat exchanger in the outlet temperature and first of machine heat exchanger in second, in first
Machine is the interior machine shut down in multi-connected machine, and machine is the interior machine run in multi-connected machine in second.Above scheme is by adjusting electronic expansion
The aperture of valve is to be maintained at the first temperature parameter for temperature difference parameters and within the temperature range of second temperature parameter constituted, so that electric
The aperture of sub- expansion valve is that the refrigerant in the interior machine for can guarantee shutdown is no longer accumulated, and solves and shuts down in multi-connected machine in the prior art
Interior machine electric expansion valve close so that refrigerant accumulate, cause in multi-connected machine can be used refrigerant reduce the technical issues of, into one
Step, it can also make the heating capacity attenuation degree of multi-connected machine lower, or do not generate decaying, avoid due to the interior machine of shutdown
The problem of decaying of multi-connected machine heat-sinking capability caused by electric expansion valve is opened.
Optionally, according to the above embodiments of the present application, the first temperature parameter is obtained, comprising:
Step S2021 obtains the attenuation rate of mechanism heat in second.
Step S2023 determines temperature difference parameters in the case that the attenuation rate of mechanism heat is greater than default attenuation rate in second
For the first temperature parameter.
In an alternative embodiment, it can be continuously increased the aperture of the electric expansion valve of machine in first, and examined simultaneously
The heating capacity for surveying machine in second in multi-connected machine, with the increase of the electronic expansion valve opening of machine in first, mechanism heat in second
Attenuation rate be continuously increased, detecting in second after the heating capacity of machine, the attenuation rate of mechanism heat in second can be got,
When the attenuation rate of mechanism heat is greater than default attenuation rate in second, determine that current aperture is aperture upper limit value, and open currently
Under degree, corresponding temperature difference parameters are the first temperature parameter.If the aperture of the electric expansion valve of machine is in current aperture in first
In the case of continue growing, then can make the heating capacity deep fades of multi-connected machine, to influence the heating effect of multi-connected machine.
Optionally, according to the above embodiments of the present application, the first temperature parameter is obtained, comprising:
Step S2025 obtains the attenuation rate of mechanism heat in second.
Step S2027 obtains current temperature difference parameters when the heating capacity attenuation rate of machine is greater than default attenuation rate in second.
Step S2029 floats current temperature difference parameters default value, upwards as the first temperature parameter.
In above-mentioned steps, when obtaining current temperature difference parameters corresponding with default attenuation rate, by current temperature difference parameters to
Upper floating, to make to insure.In an alternative embodiment, it can be continuously increased the aperture of the electric expansion valve of machine in first,
And the heating capacity of machine in second in multi-connected machine is detected simultaneously, with the increase of the electronic expansion valve opening of machine in first, in second
The attenuation rate of mechanism heat is continuously increased, and is being detected in second after the heating capacity of machine, can got mechanism heat in second
Attenuation rate obtain current temperature difference parameters, and will be current when the attenuation rate of mechanism heat is greater than default attenuation rate in second
Temperature difference parameters float 5% upwards, as the first temperature parameter.
Optionally, according to the above embodiments of the present application, second temperature parameter is obtained, comprising:
Step S2031, machine is shut down within the first preset time in first, the inlet temperature of machine heat exchanger in detection first
And outlet temperature.
Step S2033, the difference of the inlet temperature and outlet temperature of machine heat exchanger is less than the feelings of preset temperature value in first
Under condition, determine that temperature difference parameters are second temperature parameter.
Specifically, the multi-connected machine unit of different capabilities can correspond to the first different preset times.
Since the inside of machine in first is circulated without refrigerant, in first the inlet temperature and outlet temperature of machine heat exchanger it
Difference is smaller, if the difference of the inlet temperature and outlet temperature of machine heat exchanger is less than preset temperature value in first, it is determined that in first
Less refrigerant circulation is had no or only in machine heat exchanger, the electronic expansion valve opening of machine is smaller in first at this time, can be by this
When corresponding temperature difference parameters as second temperature parameter, the i.e. upper limit of temperature range.
In an alternative embodiment, preset temperature value is 2 DEG C, can constantly reduce the electric expansion valve of machine in first
Aperture, and machine heat exchanger inlet temperature and outlet temperature in detection first simultaneously, when 2 is small in first machine heat exchanger into
2 DEG C of the difference equal hour of mouth temperature and outlet temperature, then current temperature difference parameters are obtained, as second temperature parameter.If first
The aperture of the electric expansion valve of interior machine, the difference of the inlet temperature and outlet temperature of machine heat exchanger is less than preset temperature value in first
In the case where reduce, then can generate refrigerant accumulation in first inside machine causes more so that the refrigerant to circulate in multi-connected machine be made to reduce
Online heating capacity is reduced.
Optionally, according to the above embodiments of the present application, the electronic expansion valve opening of machine in first is adjusted, controls temperature difference parameters
Within the temperature range of the first temperature parameter and second temperature parameter composition, comprising:
Step S2041, if temperature difference parameters reduce opening for electric expansion valve less than the first temperature parameter, based on first rate
Degree.
Step S2043 increases opening for electric expansion valve based on the second rate if temperature difference parameters are greater than second temperature parameter
Degree.
In an alternative embodiment, using △ T as temperature difference parameters, x is as the first temperature parameter, and y is as the second temperature
Degree parameter is illustrated:
As △ T < x, determines that the electric expansion valve unlatching of machine in first is excessive, keep refrigerant bypass amount big, cause heating capacity
Decaying, turns the aperture of the electric expansion valve of machine in first down according to first rate at this time.
It as △ T > y, determines that the electric expansion valve unlatching of machine in first is too small, refrigerant is made to start to be deposited in interior machine heat exchange
In device；The aperture of machine electric expansion valve in first is tuned up according to the second rate at this time.
Above-mentioned first rate can be identical as the second rate, can also be different from the second rate.
Optionally, according to the above embodiments of the present application, the electronic expansion valve opening of machine in first is adjusted, controls temperature difference parameters
The step of within the temperature range of the first temperature parameter and second temperature parameter composition further include:
Step S2045, after the second preset time of aperture for increasing electric expansion valve, if temperature difference parameters are still greater than the
Then the temperature difference parameters of machine inlet temperature and outlet temperature in first are compared with third temperature parameter for two temperature parameters,
In, third temperature parameter is greater than second temperature parameter.
Step S2047, if the temperature difference parameters of machine inlet temperature and outlet temperature are less than third temperature parameter, base in first
Increase the aperture of electric expansion valve in third speed, wherein third speed is greater than the second rate.
In above-mentioned steps, if still detecting the temperature difference after the aperture to the second preset time of increase electric expansion valve
Parameter is greater than second temperature parameter, then is according to machine in first with the temperature difference parameters of machine inlet temperature and outlet temperature in first
The aperture of electric expansion valve be adjusted, when detecting that the temperature difference parameters of machine inlet temperature and outlet temperature are less than in first
Three temperature parameters, it is determined that the aperture of the electric expansion valve of machine is still too small in first, in order to avoid the accumulation of refrigerant, accelerates rate
Tune up the aperture of the electric expansion valve of machine in first.
When multi-connected machine heats, in the case that the electronic expansion valve opening of machine is too small in first or closes, heat exchanger first
The refrigerant of outlet port can make the cooling medium liquefaction of heat exchanger because of natural heat-exchange, if liquefaction refrigerant starts to be deposited in the heat exchanger stage,
It is liquid refrigerants in the pipe of heat exchanger exit position, temperature is lower, and heat exchanger outlet temperature is smaller, and heat exchanger entrance location
It is gaseous coolant in pipe, temperature is higher, and heat exchanger inlet temperature is larger.If the temperature and heat exchanger exit of heat exchanger entrance location
The temperature close of position, then in the pipe of heat exchanger entrance location being is also also liquid refrigerants, illustrate that accumulation is expired in heat exchanger at this time
Liquid refrigerants determines that the electric expansion valve of machine in first is opened still too small, needs to increase at this time.
In an alternative embodiment, as shown in connection with fig. 1, Ta1 is the entrance location of machine in first, and Tb2 is in first
The outlet port of machine, after the second preset time of aperture for increasing electric expansion valve, temperature difference parameters are still greater than second temperature ginseng
Number then detects the Ta1 temperature and Ta2 temperature of machine in first, if the difference of Ta1 temperature and the temperature of Ta1 is joined less than third temperature
Number, i.e., Ta1 temperature is more close with Ta1 temperature, it is determined that and having accumulated in the heat exchanger of machine in first has expired liquid refrigerants, therefore with
Third speed tunes up the aperture of machine electric expansion valve in first greater than the rate of the second rate.
Embodiment 2
According to embodiments of the present invention, a kind of embodiment of the opening control device of electric expansion valve is provided, Fig. 3 is basis
The schematic diagram of the opening control device of the electric expansion valve of the embodiment of the present invention, as shown in figure 3, the device includes:
Module 30 is obtained, for obtaining the first temperature parameter and second temperature parameter, wherein the first temperature parameter is less than the
Two temperature parameters.
Specifically, above-mentioned first temperature parameter and second temperature parameter may be constructed for controlling electronic expansion valve opening
Temperature range.Wherein, the first temperature parameter is less than second temperature parameter, i.e. the first temperature parameter can be above-mentioned temperature range
Lower limit value, second temperature parameter can be the upper limit value of above-mentioned temperature range.
Module 32 is adjusted, for adjusting the electronic expansion valve opening of machine in first, control temperature difference parameters are in the first temperature
Within the temperature range of parameter and second temperature parameter are constituted；Wherein, temperature difference parameters be second in machine heat exchanger outlet temperature with
The difference of the outlet temperature of machine heat exchanger in first, machine is the interior machine shut down in multi-connected machine in first, and machine is in multi-connected machine in second
The interior machine of operation.
Specifically, the interior machine of above-mentioned shutdown, which can be locating room temperature, reaches the temperature of setting so that out of service is interior
Machine is also possible to the interior machine of the instruction stop according to user.
Machine needs heating operation in second opened, has a large amount of refrigerants to circulate in heat exchanger, closing first in machine be not necessarily to
Heating is usually circulated without refrigerant in heat exchanger, so as to cause machine heat exchanger in second outlet temperature than first in machine exchange heat
The outlet temperature of device is high.Above scheme is in order to solve in close in multi-connected machine first refrigerant accumulation in machine heat exchanger and connecting leg
The problem of, the electric expansion valve of the interior machine of shutdown can be opened, but if the aperture of the electric expansion valve for the interior machine shut down is excessive,
System high pressure side refrigerant then can be passed to low-pressure side by the electric expansion valve that the interior machine of shutdown is opened, and lead to the system of multi-connected machine
Thermal energy power decaying, therefore, the difference of the outlet temperature of machine heat exchanger is warm in the outlet temperature and first of machine heat exchanger in second
After poor parameter, if temperature difference parameters are excessively high, it is determined that the aperture of electric expansion valve is smaller, may result in refrigerant accumulation, such as
Fruit temperature difference parameters are too low, it is determined that the aperture of electric expansion valve is larger, so that the heating capacity of multi-connected machine is decayed.
In conclusion the above embodiments of the present application obtain the first temperature parameter and second temperature parameter by obtaining module,
By adjusting the electronic expansion valve opening of machine in module adjustment first, so that temperature difference parameters are in the first temperature parameter and second temperature
Parameter constitute within the temperature range of, wherein temperature difference parameters be second in machine heat exchanger outlet temperature and first in machine heat exchanger
Outlet temperature difference, machine is the interior machine shut down in multi-connected machine in first, and machine is the interior machine run in multi-connected machine in second.It is above-mentioned
Scheme is by adjusting the aperture of electric expansion valve temperature difference parameters are maintained at the first temperature parameter and second temperature parameter institute structure
Within the temperature range of, so that the aperture of electric expansion valve can guarantee that the refrigerant in the interior machine of shutdown is no longer accumulated, solve
The electric expansion valve of the interior machine to shut down in multi-connected machine in the prior art is closed so that refrigerant accumulation, causes to can be used in multi-connected machine cold
The technical issues of matchmaker is reduced, further, can also make the heating capacity attenuation degree of multi-connected machine lower, or do not generate decaying,
The problem of avoiding multi-connected machine heat-sinking capability decaying caused by opening due to the electric expansion valve of the interior machine of shutdown.
Optionally, according to the above embodiments of the present application, above-mentioned acquisition module includes:
First acquisition submodule, for obtaining the attenuation rate of mechanism heat in second.
First determines submodule, in the case that the attenuation rate for the mechanism heat in second is greater than default attenuation rate, really
Determining temperature difference parameters is the first temperature parameter.
Optionally, according to the above embodiments of the present application, above-mentioned acquisition module includes:
Second acquisition submodule, for obtaining the attenuation rate of mechanism heat in second.
Third acquisition submodule when the heating capacity attenuation rate for the machine in second is greater than default attenuation rate, obtains current
Temperature difference parameters.
Second determines submodule, for current temperature difference parameters to be floated default value upwards, as the first temperature parameter.
Optionally, according to the above embodiments of the present application, above-mentioned acquisition module includes:
Detection sub-module, in first machine shut down the first preset time within, detection first in machine heat exchanger into
Mouth temperature and outlet temperature；
Third determines submodule, and the difference for the inlet temperature and outlet temperature of machine heat exchanger in first is less than default temperature
In the case where angle value, determine that temperature difference parameters are second temperature parameter.
Optionally, according to the above embodiments of the present application, above-mentioned adjustment module includes:
Reduce aperture submodule, if reducing electronics for temperature difference parameters less than the first temperature parameter with first rate
The aperture of expansion valve；
First increases aperture submodule, if being greater than second temperature parameter for temperature difference parameters, with the increase of the second rate
The aperture of electric expansion valve.
Optionally, according to the above embodiments of the present application, above-mentioned adjustment module further include:
Compare submodule, for increase electric expansion valve the second preset time of aperture after, if temperature difference parameters are still
Greater than second temperature parameter, then the temperature difference parameters of machine inlet temperature and outlet temperature in first are compared with third temperature parameter
It is right, wherein third temperature parameter is greater than second temperature parameter.
Second increases aperture submodule, if for the temperature difference parameters of machine inlet temperature and outlet temperature in first less than the
Three temperature parameters increase the aperture of electric expansion valve then with third speed, wherein third speed is greater than the second rate.
Embodiment 3
According to embodiments of the present invention, a kind of storage medium is provided, storage medium includes the program of storage, wherein in journey
Equipment executes the aperture control method of the electric expansion valve of any one of embodiment 1 where controlling storage medium when sort run.
Embodiment 4
According to embodiments of the present invention, a kind of processor is provided, processor is for running program, wherein when program is run
Execute the aperture control method of the electric expansion valve of any one of embodiment 1.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (14)
1. a kind of aperture control method of electric expansion valve characterized by comprising
Obtain the first temperature parameter and second temperature parameter, wherein first temperature parameter is less than second temperature parameter；
The electronic expansion valve opening of machine in adjustment first, control temperature difference parameters are in first temperature parameter and second temperature
It spends within the temperature range of parameter composition；
Wherein, the temperature difference parameters be second in machine heat exchanger outlet temperature and first in machine heat exchanger outlet temperature it
Difference, machine is the interior machine shut down in multi-connected machine in described first, and machine is the interior machine run in the multi-connected machine in described second.
2. the method according to claim 1, wherein obtaining the first temperature parameter, comprising:
Obtain the attenuation rate of mechanism heat in described second；
In the case that the attenuation rate of mechanism heat is greater than default attenuation rate in described second, determine that the temperature difference parameters are described
First temperature parameter.
3. the method according to claim 1, wherein obtaining the first temperature parameter, comprising:
Obtain the attenuation rate of mechanism heat in described second；
When the heating capacity attenuation rate of machine is greater than default attenuation rate in described second, current temperature difference parameters are obtained；
The current temperature difference parameters are floated default value upwards, as first temperature parameter.
4. the method according to claim 1, wherein obtaining second temperature parameter, comprising:
Machine is shut down within the first preset time in described first, the inlet temperature and outlet of machine heat exchanger in detection described first
Temperature；
In the case that the difference of the inlet temperature and outlet temperature of machine heat exchanger is less than preset temperature value in described first, institute is determined
Stating temperature difference parameters is the second temperature parameter.
5. method as claimed in any of claims 1 to 4, which is characterized in that the electronic expansion of machine in adjustment first
Valve opening, control temperature difference parameters are within the temperature range of first temperature parameter and second temperature parameter composition, packet
It includes:
If the temperature difference parameters are less than first temperature parameter, opening for the electric expansion valve is reduced based on first rate
Degree；
If the temperature difference parameters are greater than the second temperature parameter, opening for the electric expansion valve is increased based on the second rate
Degree.
6. according to the method described in claim 5, control is warm it is characterized in that, adjusting the electronic expansion valve opening of machine in first
The step of poor parameter is within the temperature range of first temperature parameter and the second temperature parameter are constituted further include:
After the second preset time of aperture for increasing the electric expansion valve, if the temperature difference parameters are greater than second temperature
Parameter is spent, then the temperature difference in described first between machine inlet temperature and outlet temperature is compared with third temperature parameter,
In, the third temperature parameter is greater than the second temperature parameter；
If the temperature difference in described first between machine inlet temperature and outlet temperature is less than the third temperature parameter, it is based on third
Rate increases the aperture of the electric expansion valve, wherein the third speed is greater than second rate.
7. a kind of opening control device of electric expansion valve characterized by comprising
Module is obtained, for obtaining the first temperature parameter and second temperature parameter, wherein first temperature parameter is less than second
Temperature parameter；
Module is adjusted, for adjusting the electronic expansion valve opening of machine in first, control temperature difference parameters are in first temperature ginseng
Within the temperature range of the several and second temperature parameter is constituted；
Wherein, the temperature difference parameters be second in machine heat exchanger outlet temperature and first in machine heat exchanger outlet temperature it
Difference, machine is the interior machine shut down in multi-connected machine in described first, and machine is the interior machine run in the multi-connected machine in described second.
8. device according to claim 7, which is characterized in that the acquisition module includes:
First acquisition submodule, for obtaining the attenuation rate of mechanism heat in described second；
First determines submodule, in the case that the attenuation rate for the mechanism heat in described second is greater than default attenuation rate, really
The fixed temperature difference parameters are first temperature parameter.
9. device according to claim 7, which is characterized in that the acquisition module includes:
Second acquisition submodule, for obtaining the attenuation rate of mechanism heat in described second；
Third acquisition submodule when the heating capacity attenuation rate for the machine in described second is greater than default attenuation rate, obtains current
Temperature difference parameters；
Second determines submodule, for the current temperature difference parameters to be floated default value upwards, joins as first temperature
Number.
10. device according to claim 7, which is characterized in that the acquisition module includes:
Detection sub-module, within the first preset time of machine shutdown, detecting machine heat exchanger in described first in described first
Inlet temperature and outlet temperature；
Third determines submodule, and the difference for the inlet temperature and outlet temperature of machine heat exchanger in described first is less than default temperature
In the case where angle value, determine that the temperature difference parameters are the second temperature parameter.
11. the device according to any one of claim 7 to 10, which is characterized in that the adjustment module includes:
Reduce aperture submodule, if being less than first temperature parameter for the temperature difference parameters, is reduced with first rate
The aperture of the electric expansion valve；
First increases aperture submodule, if being greater than the second temperature parameter for the temperature difference parameters, with the second rate
Increase the aperture of the electric expansion valve.
12. device according to claim 11, which is characterized in that the adjustment module further include:
Submodule is compared, for after the second preset time of aperture for increasing the electric expansion valve, if the temperature difference is joined
Number is still greater than the second temperature parameter, then by the temperature difference and third temperature in described first between machine inlet temperature and outlet temperature
Degree parameter is compared, wherein the third temperature parameter is greater than the second temperature parameter；
Second increases aperture submodule, if being less than institute for the temperature difference in described first between machine inlet temperature and outlet temperature
Third temperature parameter is stated, then increases the aperture of the electric expansion valve with third speed, wherein the third speed is greater than described
Second rate.
13. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require any one of 1 to 6 described in electric expansion valve aperture control
Method processed.
14. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run
Benefit require any one of 1 to 6 described in electric expansion valve aperture control method.
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| CN201710248155.0A CN107144054B (en) | 2017-04-14 | 2017-04-14 | Opening degree control method and device of electronic expansion valve |
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| CN201710248155.0A CN107144054B (en) | 2017-04-14 | 2017-04-14 | Opening degree control method and device of electronic expansion valve |
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| CN108006909B (en) * | 2017-11-21 | 2020-05-08 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and control method of electronic expansion valve in heating mode of multi-split air conditioning system |
| CN108151249B (en) * | 2017-12-25 | 2021-02-23 | 广东美的制冷设备有限公司 | Operation control method, operation control device, air conditioner and computer readable storage medium |
| CN108548297B (en) * | 2018-04-28 | 2020-07-21 | 四川虹美智能科技有限公司 | Multi-split air conditioner and method for controlling refrigerants of multi-split air conditioner |
| CN109059360A (en) * | 2018-06-19 | 2018-12-21 | 广东美的制冷设备有限公司 | Control method, air-conditioning and the computer readable storage medium of electric expansion valve |
| CN110160231B (en) * | 2019-05-29 | 2021-11-30 | 广东美的暖通设备有限公司 | Valve control method, indoor unit, and computer-readable storage medium |
| CN110500702A (en) * | 2019-08-26 | 2019-11-26 | 海信（山东）空调有限公司 | Air conditioner, indoor unit electric expansion valve control method and device |
| CN110567128A (en) * | 2019-09-23 | 2019-12-13 | 宁波奥克斯电气股份有限公司 | multi-split air conditioner and control method thereof |
| CN113531856A (en) * | 2020-04-22 | 2021-10-22 | 青岛海尔空调电子有限公司 | Multi-connected air conditioning system and refrigerant flow control method thereof |
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| KR100802623B1 (en) * | 2006-02-28 | 2008-02-13 | 엘지전자 주식회사 | Apparatus and method for controlling electronic expansion apparatus of air conditioning system |
| CN104006445B (en) * | 2013-02-26 | 2017-04-12 | 珠海格力电器股份有限公司 | Multi-connected air conditioner and control method thereof |
| CN105115199B (en) * | 2015-07-06 | 2017-10-31 | 广东美的暖通设备有限公司 | The coolant distribution control method and device of multiple on-line system |
| CN105485861B (en) * | 2016-01-06 | 2018-09-18 | 珠海格力电器股份有限公司 | Method and device for controlling opening of heat expansion valve of multi-split air conditioner |
| CN105928266B (en) * | 2016-05-23 | 2018-06-05 | 广东美的暖通设备有限公司 | Multi-line system and its control method for heating restricting element |
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