CN110388769A - The control method and control system of electric expansion valve - Google Patents
The control method and control system of electric expansion valve Download PDFInfo
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- CN110388769A CN110388769A CN201910620489.5A CN201910620489A CN110388769A CN 110388769 A CN110388769 A CN 110388769A CN 201910620489 A CN201910620489 A CN 201910620489A CN 110388769 A CN110388769 A CN 110388769A
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- wind speed
- temperature
- expansion valve
- electric expansion
- penalty coefficient
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to air-conditioning technique fields, and in particular to a kind of control method and control system of electric expansion valve.Present invention seek to address that the technical solution that the existing target exhaust temperature based on compressor adjusts electric expansion valve is easy to appear the problem that electric expansion valve excessively throttles and efficiency is low.For this purpose, the control method of electric expansion valve of the invention includes: the actual exhaust air temperature for obtaining compressor and the wind speed of indoor fan；Based on wind speed, wind speed penalty coefficient is selectively determined；Based on wind speed penalty coefficient, the target exhaust temperature of compressor is calculated；Compare the size of target exhaust temperature and actual exhaust air temperature；Based on comparative result, the aperture of electric expansion valve is controlled.By above-mentioned control mode, the control method of the electric expansion valve of the application can be improved the control precision of electric expansion valve, and air conditioner is made to be able to maintain that high energy efficiency state under each wind speed.
Description
Technical field
The present invention relates to air-conditioning technique fields, and in particular to a kind of control method of electric expansion valve and control system
System.
Background technique
Electric expansion valve is widely used due to accurately controlling the cold medium flux in air conditioner.In the prior art, right
The aperture control of electric expansion valve mainly has the control of the suction superheat based on compressor and the target exhaust temperature based on compressor
Degree control two ways.Wherein, the method for the target exhaust temperature control electric expansion valve based on compressor is main are as follows: base first
Calculate the target exhaust temperature of compressor in the operating parameter of air conditioner and environmental parameter etc., then by target exhaust temperature with
The actual exhaust air temperature of the compressor detected is compared, and carries out closed loop control according to aperture of the comparison result to electric expansion valve
System.
But the mode side of the existing target exhaust temperature control electric expansion valve based on compressor has ignored room mostly
Influence of the load change of inner blower at different wind speeds to target exhaust temperature.Especially lower in wind speed and other conditions are not
In the case where change, it is easy to appear that suction superheat that electric expansion valve excessively throttles so as to cause overcompression machine is bigger than normal and system energy
Imitate low situation.
Correspondingly, this field needs control method and the control system of a kind of new electric expansion valve to solve above-mentioned ask
Topic.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve the existing target exhaust temperature tune based on compressor
The technical solution of section electric expansion valve is easy to appear the problem that electric expansion valve excessively throttles and efficiency is low, and the present invention provides one
The control method of kind electric expansion valve, the electric expansion valve are set in air conditioner, and the control method includes:
Obtain the actual exhaust air temperature of compressor and the wind speed of indoor fan；
Based on the wind speed, wind speed penalty coefficient is selectively determined；
Based on the wind speed penalty coefficient, the target exhaust temperature of the compressor is calculated；
Compare the size of the target exhaust temperature and the actual exhaust air temperature；
Based on comparative result, the aperture of the electric expansion valve is controlled.
In the optimal technical scheme of the control method of above-mentioned electric expansion valve, the control method further include: obtain room
The running frequency of external environment temperature and the compressor " is based on the wind speed penalty coefficient, calculates the target row of the compressor
The step of temperature degree ", further comprises:
Based on the outdoor environment temperature, temperature offset；
Based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, the compressor is calculated
Target exhaust temperature.
In the optimal technical scheme of the control method of above-mentioned electric expansion valve, " it is based on the running frequency, the temperature
Offset and the wind speed penalty coefficient, calculate the target exhaust temperature of the compressor " the step of further comprise:
The target exhaust temperature is calculated using method shown in following formula:
T=Af+C+D
Wherein, the T is target exhaust temperature, and the A is delivery temperature coefficient, and the f is the running frequency of compressor,
The C is temperature compensation value, and the D is wind speed penalty coefficient.
In the optimal technical scheme of the control method of above-mentioned electric expansion valve, " it is based on the wind speed, is selectively determined
The step of wind speed penalty coefficient ", further comprises:
Based on the corresponding relationship between the wind speed and the wind speed penalty coefficient, the wind speed penalty coefficient is determined.
In the optimal technical scheme of the control method of above-mentioned electric expansion valve, " it is based on the wind speed, is selectively determined
The step of wind speed penalty coefficient ", further comprises:
Judge whether the wind speed is less than or equal to wind speed setting；
When the wind speed is less than or equal to the wind speed setting, based between the wind speed and the wind speed penalty coefficient
Corresponding relationship, determine the wind speed penalty coefficient.
The present invention also provides a kind of control system of electric expansion valve, the electric expansion valve is set in air conditioner,
The control system includes:
Acquisition module, the acquisition module are used to obtain the actual exhaust air temperature of compressor and the wind speed of indoor fan；
Computing module, the computing module are used to be based on the wind speed, selectively determine wind speed penalty coefficient, Yi Jiji
In the wind speed penalty coefficient, the target exhaust temperature of the compressor is calculated；
Comparison module, the comparison module are big for the target exhaust temperature and the actual exhaust air temperature
It is small；
Control module, the control module are used to be based on judging result, control the aperture of the electric expansion valve.
In the optimal technical scheme of the control system of above-mentioned electric expansion valve, the acquisition module is also used to obtain outdoor
The running frequency of environment temperature and the compressor, the computing module are based on wind speed compensation system in the following way
Number, calculates the target exhaust temperature of the compressor:
Based on the outdoor environment temperature, temperature offset；
Based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, the compressor is calculated
Target exhaust temperature.
In the optimal technical scheme of the control system of above-mentioned electric expansion valve, the computing module by following formula come
Based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, the target exhaust of the compressor is calculated
Temperature:
T=Af+C+D
Wherein, the T is target exhaust temperature, and the A is delivery temperature coefficient, and the f is the running frequency of compressor,
The C is temperature compensation value, and the D is wind speed penalty coefficient.
In the optimal technical scheme of the control system of above-mentioned electric expansion valve, the computing module comes in the following way
Based on the wind speed, wind speed penalty coefficient is selectively determined:
Based on the corresponding relationship between the wind speed and the wind speed penalty coefficient, the wind speed penalty coefficient is determined.
In the optimal technical scheme of the control system of above-mentioned electric expansion valve, the computing module comes in the following way
Based on the wind speed, wind speed penalty coefficient is selectively determined:
Judge whether the wind speed is less than or equal to wind speed setting；
When the wind speed is less than or equal to the wind speed setting, based between the wind speed and the wind speed penalty coefficient
Corresponding relationship, determine the wind speed penalty coefficient.
It will be appreciated to those of skill in the art that electric expansion valve is set in the preferred technical solution of the present invention
In air conditioner, the control method of electric expansion valve includes: the actual exhaust air temperature for obtaining compressor and the wind speed of indoor fan；Base
In wind speed, wind speed penalty coefficient is selectively determined；Based on wind speed penalty coefficient, the target exhaust temperature of compressor is calculated；Than
Compared with the size of target exhaust temperature and actual exhaust air temperature；Based on comparative result, the aperture of electric expansion valve is controlled.
By above-mentioned control mode, the control method of the electric expansion valve of the application can be improved the control of electric expansion valve
Precision makes air conditioner be able to maintain that high energy efficiency state under each wind speed.Specifically, usually in the prior art to target exhaust
The calculating of temperature does not consider to influence brought by the wind speed of indoor fan, so, in the feelings that target exhaust temperature determines
Under condition, indoor fan wind speed can actual exhaust air temperature to compressor generate tremendous influence.For example, air conditioner operation refrigeration mould
Formula, indoors when the wind speed of blower lower (such as wind speed is low wind file or mute file), refrigerant in indoor unit not completely with interior
Air carries out heat exchange, reduces so as to cause the refrigerant temperature for returning to compressor, and the actual exhaust air temperature of compressor reduces.This
When, for guarantee actual exhaust air temperature match with target exhaust temperature, air conditioner control electronic expansion valve opening excessively reduce and
There is excessively throttling, enters the room the coolant quantity in machine and be also greatly decreased therewith, so that refrigerant mentions under the premise of wind speed is constant
Preceding completion phase transformation and cause the suction superheat of compressor bigger than normal and system energy efficiency reduce.And pass through the wind speed based on indoor fan
Selectively determine wind speed penalty coefficient, the control method of the electric expansion valve of the application can be based on wind speed penalty coefficient to mesh
Mark delivery temperature compensates, so that air conditioner is adjusted based on aperture of the compensated target exhaust temperature to electric expansion valve
It is more accurate when section, when especially blower is in lower rotation speed operation indoors, by the compensation to target exhaust temperature, keep away
The problem low with efficiency that excessively throttle caused by electronic expansion valve opening is too small is exempted from.
Detailed description of the invention
The control method of electric expansion valve of the invention is described with reference to the accompanying drawings and in conjunction with the refrigeration mode of air conditioner
And control system.In attached drawing:
Fig. 1 is the flow chart of the control method of electric expansion valve of the invention；
Fig. 2 is a kind of flow chart of preferable embodiment of the control method of electric expansion valve of the invention；
Fig. 3 is the schematic diagram of the control system of electric expansion valve of the invention.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.For example, following
Although each step is described in the way of above-mentioned precedence in embodiment, those skilled in the art can be with
Understand, in order to realize the effect of the present embodiment, is executed between different steps not necessarily in such order, it can be simultaneously
(parallel) execution is executed with reverse order, these simple variations are all within protection scope of the present invention.
With reference first to Fig. 1, the control method of electric expansion valve of the invention is described.Wherein, Fig. 1 is of the invention
The flow chart of the control method of electric expansion valve.
As shown in Figure 1, to solve the technical solution that the existing target exhaust temperature based on compressor adjusts electric expansion valve
The problem that the electric expansion valve being easy to appear excessively throttles and efficiency is low, this application provides a kind of controlling parties of electric expansion valve
Method, electric expansion valve are set in air conditioner, in addition to above-mentioned electric expansion valve, air conditioner further include compressor, indoor heat exchanger,
The components such as indoor fan, outdoor heat exchanger, outdoor fan.Wherein, the control method of electric expansion valve mainly includes walking as follows
It is rapid:
The wind speed of S100, the actual exhaust air temperature for obtaining compressor and indoor fan；For example, passing through the exhaust in compressor
Setting temperature sensing package or the mode of temperature sensor acquire the actual exhaust air temperature of compressor on pipe, pass through the operation for reading air conditioner
The mode of the gear of the motor speed or current setting of parameter, such as indoor fan obtains the wind speed of indoor fan.
S200, it is based on wind speed, selectively determines wind speed penalty coefficient；For example, being that low wind file or motor turn in wind speed
When speed is less than certain revolving speed, a wind speed penalty coefficient is determined based on current wind speed；Or based on the indoor fan got
Corresponding relationship between wind speed and wind speed penalty coefficient determines wind speed penalty coefficient；Wherein, wind speed penalty coefficient is for calculating
Calculated result is compensated when the target exhaust temperature of compressor.
S300, it is based on wind speed penalty coefficient, calculates the target exhaust temperature of compressor；For example, in traditional compressor
On the basis of the calculation method of target exhaust temperature, by way of adding and subtracting wind speed penalty coefficient, the mesh of compressor is calculated
Mark delivery temperature；Or based on the fitting formula containing wind speed penalty coefficient, target exhaust temperature is directly calculated.Certainly,
Those skilled in the art can also use the calculation method of other any traditional target exhaust temperatures, as long as being calculated
Wind speed compensation is carried out to it based on the principle of the application in target exhaust temperature.
S400, the size for comparing target exhaust temperature and actual exhaust air temperature；For example, calculating target exhaust temperature
Afterwards, the size both compared with calculating target exhaust temperature by way of the difference between actual exhaust air temperature.Certainly, the two
Manner of comparison and not exclusive, those skilled in the art can certainly be using any other reasonable manner to the two memory ratio
Compared with.For example, can also directly be compared to the size of the two, or the ratio by both calculating carries out size relatively etc..
S500, based on comparative result, controls the aperture of electric expansion valve；For example, being arranged in actual exhaust air temperature less than target
When temperature is spent, the aperture of electric expansion valve is notified to reduce；When actual exhaust air temperature is greater than target exhaust temperature, control electronics is swollen
The aperture of swollen valve increases；When actual exhaust air temperature is equal to target temperature, control electric expansion valve keeps current aperture.
By above-mentioned control mode, the control method of the electric expansion valve of the application can be improved the control of electric expansion valve
Precision makes air conditioner be able to maintain that high energy efficiency state under each wind speed.Specifically, usually in the prior art to target exhaust
The calculating of temperature does not consider to influence brought by the wind speed of indoor fan, so, in the feelings that target exhaust temperature determines
Under condition, indoor fan wind speed can actual exhaust air temperature to compressor generate tremendous influence.For example, the wind speed of blower indoors
When lower (such as wind speed is low wind file or mute file), the refrigerant in indoor unit does not carry out heat exchange with room air completely, thus
The refrigerant temperature for returning to compressor is caused to reduce, the actual exhaust air temperature of compressor reduces.At this point, to guarantee actual exhaust air temperature
Match with target exhaust temperature, air conditioner control electronic expansion valve opening reduces and is easy to appear excessive throttling, enters the room
Coolant quantity in machine is also reduced therewith, so that refrigerant all undergoes phase transition and cause the suction of compressor under the premise of wind speed is constant
The gas degree of superheat is bigger than normal and system energy efficiency reduces.And wind speed penalty coefficient is selectively determined by the wind speed based on indoor fan,
The control method of the electric expansion valve of the application can compensate target exhaust temperature based on wind speed penalty coefficient, make to have leisure
Adjust device more accurate when being adjusted based on aperture of the compensated target exhaust temperature to electric expansion valve, especially indoors
When blower is in lower rotation speed operation, by the compensation to target exhaust temperature, avoid electronic expansion valve opening it is too small and
The caused excessive throttling problem low with efficiency.
Below with reference to Fig. 2, a kind of preferable embodiment of the application is described.Wherein, Fig. 2 is electricity of the invention
A kind of flow chart of preferable embodiment of the control method of sub- expansion valve.
As shown in Fig. 2, the control method of electric expansion valve mainly includes walking as follows in a kind of preferable embodiment
It is rapid:
S10, outdoor environment temperature, the running frequency of compressor, the actual exhaust air temperature of compressor and indoor wind are obtained
The wind speed of machine；Such as obtaining outdoor environment temperature in such a way that temperature sensor or temperature sensing package is arranged in outdoor unit of the air conditioner；
The actual exhaust air temperature for obtaining compressor by the way that temperature sensor is arranged on the exhaust pipe of compressor；By obtaining compressor
Operating parameter obtains the running frequency of compressor；Gear by obtaining indoor fan obtains the wind speed of indoor fan.
S20, the gear based on outdoor environment temperature and indoor fan, respectively temperature offset and wind speed compensation are
Number；For example, passing through corresponding relationship or the empirical equation etc. between outdoor environment temperature and temperature compensation value, temperature-compensating is determined
Coefficient；By the corresponding relationship between the gear and wind speed penalty coefficient of indoor fan, wind speed penalty coefficient is obtained.Due to outdoor
Environment temperature is more obvious on the influence of the target exhaust temperature of compressor, therefore in the application, needs to calculate outdoor environment temperature
Temperature compensation value the calculated result of target exhaust temperature compensated.Wherein, as a kind of preferable embodiment, room
Corresponding relationship between the gear of inner blower and wind speed penalty coefficient can be obtained by corresponding to table as follows:
| Wind speed penalty coefficient D | Strongly | Gao Feng | Apoplexy | Low wind | It is mute |
| Heating mode | 0 | 0 | 0 | 1℃ | 3℃ |
| Refrigeration mode | 0 | 0 | 0 | -2℃ | -4℃ |
S30, it is based on running frequency, temperature compensation value and wind speed penalty coefficient, calculates target exhaust temperature；For example, passing through
Following formula (1) calculates target exhaust temperature:
T=Af+C+D (1)
In formula (1), T is target exhaust temperature, and A is delivery temperature coefficient, and f is the running frequency of compressor, and C is temperature
Offset, D are wind speed penalty coefficient.In general, the running frequency of compressor plays a decisive role to target exhaust temperature, and temperature
Then there are certain influence, therefore the fortune that an object of the application delivery temperature passes through compressor to the calculating of target exhaust temperature with wind speed
Line frequency, temperature compensation value and wind speed penalty coefficient joint determine.Wherein, delivery temperature coefficient can be determined by test,
It can be drafted by experience.
For example, in a kind of possible embodiment, it is assumed that A=1, f=60Hz, current outdoor environment temperature are 35
DEG C, C=15 DEG C of corresponding temperature compensation value, and the wind speed of indoor fan is in low wind file position, i.e., D=-2 DEG C at present, by
This T=1 × 60+15-2=73 DEG C of calculated target exhaust temperature.After calculating target exhaust temperature, it is based on the target exhaust
The aperture of temperature adjusting electric expansion valve.
S40, the size based on target exhaust temperature Yu actual exhaust air temperature, control the aperture of electric expansion valve；For example, base
In the size of target exhaust temperature and actual exhaust air temperature, the aperture of electric expansion valve is controlled by way of PID control；In reality
When border delivery temperature is less than target exhaust temperature, the aperture for controlling electric expansion valve reduces, and flows through indoor heat exchanger to reduce
Coolant quantity, to improve the actual exhaust air temperature of compressor, make actual exhaust air temperature to improve the suction superheat of compressor
Degree is adapted with target exhaust temperature；For another example, when actual exhaust air temperature is greater than target exhaust temperature, electric expansion valve is controlled
Aperture increases, to increase the coolant quantity for flowing through indoor heat exchanger, so that the suction superheat of compressor is reduced, to reduce pressure
The actual exhaust air temperature of contracting machine is adapted actual exhaust air temperature and target exhaust temperature.
By above-mentioned control mode, the control method of the electric expansion valve of the application can be based on the operation frequency of compressor
Rate, temperature compensation value and blower penalty coefficient, which are combined, determines target exhaust temperature, and then passes through target exhaust temperature and reality
The size of delivery temperature controls the aperture of electric expansion valve, reaches and is controlled at different wind speeds based on target exhaust temperature
The more accurate purpose of the aperture of electric expansion valve, so that air conditioner be made to be able to maintain that high energy efficiency state under each wind speed.
It should be noted that above-mentioned preferred embodiment is only intended to illustrate the principle of the present invention, it is not intended that in limit
Protection scope of the present invention processed.Under the premise of without departing from the principle of the invention, those skilled in the art can be to above-mentioned controlling party
Formula is adjusted, so that the present invention can be suitable for more specifical application scenarios.
For example, the calculation of target exhaust temperature is simultaneously not exclusive in a kind of interchangeable embodiment, can be into
Under the premise of row wind speed compensates, any possible formula for calculating target exhaust temperature be can be applied in the application.For example,
Pass through user's set temperature, indoor return air temperature, indoor heat exchanger middle portion temperature, outdoor heat exchanger middle portion temperature, compressor row
One or more of temperature degree, outdoor environment temperature and revolving speed of outdoor fan, to calculate target exhaust temperature etc..
For another example, in another alternatively embodiment, those skilled in the art can be to wind speed penalty coefficient really
Determine mode to be reasonably adjusted, as long as the adjustment can carry out effective compensation to the calculating of target exhaust temperature.On for example,
Text describe only wind speed be less than or equal to wind speed setting when (such as gear be low wind file or mute file when or blower motor turn
When speed is less than a lower revolving speed), to target exhaust temperature carry out wind speed compensation, and wind speed be greater than wind speed setting when, not to mesh
The case where mark delivery temperature compensates, but those skilled in the art can also set a phase in any wind-speed gear
The wind speed penalty coefficient of adaptation compensates target exhaust temperature.For example lesser compensation is set when wind speed is in high tap position
Coefficient sets biggish penalty coefficient when wind speed is in low-grade location.
Certainly, between the above-mentioned embodiment that can be replaced and the embodiment that can be replaced and preferred embodiment party
It can also intersect between formula and be used cooperatively, to be combined into new embodiment to be suitable for more specifical application scenarios.
Below with reference to Fig. 3, the control system of electric expansion valve of the invention is described briefly.Wherein, Fig. 3 is the present invention
Electric expansion valve control system schematic diagram.
As shown in figure 3, the control method with electric expansion valve is corresponding, present invention also provides a kind of electric expansion valves
Control system, the control system mainly include acquisition module, computing module, comparison module and control module.Wherein:
Acquisition module is used to obtain the actual exhaust air temperature of compressor and the wind speed of indoor fan；
Computing module is used to be based on wind speed, selectively determines wind speed penalty coefficient, and be based on wind speed penalty coefficient, meter
Calculate the target exhaust temperature of compressor；
Comparison module is used to compare the size of target exhaust temperature and actual exhaust air temperature；
Control module is used to be based on judging result, controls the aperture of electric expansion valve.
Further, in a kind of possible embodiment, acquisition module is also used to obtain outdoor environment temperature and compression
The running frequency of machine, computing module are based on wind speed penalty coefficient in the following way, calculate the target exhaust temperature of compressor:
Based on outdoor environment temperature, temperature offset；Based on running frequency, temperature compensation value and wind speed penalty coefficient, calculate
The target exhaust temperature of compressor.
Further, in a kind of possible embodiment, computing module is based on running frequency, temperature by following formula
Offset and wind speed penalty coefficient are spent, the target exhaust temperature of compressor: T=Af+C+D is calculated.Wherein, T is target exhaust
Temperature, A are delivery temperature coefficient, and f is the running frequency of compressor, and C is temperature compensation value, and D is wind speed penalty coefficient.
Further, in a kind of possible embodiment, computing module is based on wind speed in the following way, selectivity
Ground determines wind speed penalty coefficient: based on the corresponding relationship between wind speed and wind speed penalty coefficient, determining wind speed penalty coefficient.
Further, in alternatively possible embodiment, computing module is based on wind speed in the following way, selection
Property determine wind speed penalty coefficient: judge whether wind speed is less than or equal to wind speed setting；It is less than or equal to wind speed setting in wind speed
When, based on the corresponding relationship between wind speed and wind speed penalty coefficient, determine wind speed penalty coefficient.
By above-mentioned set-up mode, the control system of the electric expansion valve of the application can be based on wind speed penalty coefficient to mesh
Mark delivery temperature compensates, so that air conditioner is adjusted based on aperture of the compensated target exhaust temperature to electric expansion valve
It is more accurate when section, when especially blower is in lower rotation speed operation indoors, by the compensation to target exhaust temperature, mention
The high control precision of electric expansion valve, makes air conditioner be able to maintain that high energy efficiency state under each wind speed, it is swollen to avoid electronics
Excessively throttle the problem low with efficiency caused by swollen valve opening is too small.
It will be appreciated to those of skill in the art that can be on above-mentioned each module physical be set to it is special in air conditioner
For executing the module of the method for the present invention, a functional module or the function list being also possible in the controller of existing air conditioner
Member.
It should be noted that although the above-detailed detailed step of the method for the present invention, without departing from this hair
Under the premise of bright basic principle, those skilled in the art can be combined above-mentioned steps, be split and reversed order, so
Modified technical solution does not change basic conception of the invention, therefore also falls within protection scope of the present invention.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of control method of electric expansion valve, the electric expansion valve are set in air conditioner, which is characterized in that the control
Method processed includes:
Obtain the actual exhaust air temperature of compressor and the wind speed of indoor fan；
Based on the wind speed, wind speed penalty coefficient is selectively determined；
Based on the wind speed penalty coefficient, the target exhaust temperature of the compressor is calculated；
Compare the size of the target exhaust temperature and the actual exhaust air temperature；
Based on comparative result, the aperture of the electric expansion valve is controlled.
2. the control method of electric expansion valve according to claim 1, which is characterized in that the control method further include:
The running frequency of outdoor environment temperature and the compressor is obtained, " the wind speed penalty coefficient is based on, calculates the compressor
The step of target exhaust temperature ", further comprises:
Based on the outdoor environment temperature, temperature offset；
Based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, the target of the compressor is calculated
Delivery temperature.
3. the control method of electric expansion valve according to claim 2, which is characterized in that " be based on the running frequency, institute
State temperature compensation value and the wind speed penalty coefficient, calculate the target exhaust temperature of the compressor " the step of further wrap
It includes:
The target exhaust temperature is calculated using method shown in following formula:
T=Af+C+D
Wherein, the T is target exhaust temperature, and the A is delivery temperature coefficient, and the f is the running frequency of compressor, described
C is temperature compensation value, and the D is wind speed penalty coefficient.
4. the control method of electric expansion valve according to claim 1, which is characterized in that " be based on the wind speed, selectivity
Ground determines wind speed penalty coefficient " the step of further comprise:
Based on the corresponding relationship between the wind speed and the wind speed penalty coefficient, the wind speed penalty coefficient is determined.
5. the control method of electric expansion valve according to claim 1, which is characterized in that " be based on the wind speed, selectivity
Ground determines wind speed penalty coefficient " the step of further comprise:
Judge whether the wind speed is less than or equal to wind speed setting；
When the wind speed is less than or equal to the wind speed setting, based on pair between the wind speed and the wind speed penalty coefficient
It should be related to, determine the wind speed penalty coefficient.
6. a kind of control system of electric expansion valve, the electric expansion valve are set in air conditioner, which is characterized in that the control
System processed includes:
Acquisition module, the acquisition module are used to obtain the actual exhaust air temperature of compressor and the wind speed of indoor fan；
Computing module, the computing module are used to be based on the wind speed, selectively determine wind speed penalty coefficient, and be based on institute
Wind speed penalty coefficient is stated, the target exhaust temperature of the compressor is calculated；
Comparison module, the comparison module are used for the size of the target exhaust temperature and the actual exhaust air temperature；
Control module, the control module are used to be based on judging result, control the aperture of the electric expansion valve.
7. the control system of electric expansion valve according to claim 6, which is characterized in that the acquisition module is also used to obtain
The running frequency of outdoor environment temperature and the compressor is taken, the computing module is based on the wind speed in the following way and mends
Coefficient is repaid, the target exhaust temperature of the compressor is calculated:
Based on the outdoor environment temperature, temperature offset；
Based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, the target of the compressor is calculated
Delivery temperature.
8. the control system of electric expansion valve according to claim 7, which is characterized in that the computing module passes through as follows
Formula is based on the running frequency, the temperature compensation value and the wind speed penalty coefficient, calculates the mesh of the compressor
Mark delivery temperature:
T=Af+C+D
Wherein, the T is target exhaust temperature, and the A is delivery temperature coefficient, and the f is the running frequency of compressor, described
C is temperature compensation value, and the D is wind speed penalty coefficient.
9. the control system of electric expansion valve according to claim 6, which is characterized in that the computing module passes through as follows
Mode is based on the wind speed, selectively determines wind speed penalty coefficient:
Based on the corresponding relationship between the wind speed and the wind speed penalty coefficient, the wind speed penalty coefficient is determined.
10. the control system of electric expansion valve according to claim 6, which is characterized in that the computing module is by such as
Under type is based on the wind speed, selectively determines wind speed penalty coefficient:
Judge whether the wind speed is less than or equal to wind speed setting；
When the wind speed is less than or equal to the wind speed setting, based on pair between the wind speed and the wind speed penalty coefficient
It should be related to, determine the wind speed penalty coefficient.
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| CN201910620489.5A CN110388769B (en) | 2019-07-10 | 2019-07-10 | Control method and control system of electronic expansion valve |
| PCT/CN2020/113769 WO2021004553A1 (en) | 2019-07-10 | 2020-09-07 | Method and system for controlling electronic expansion valve |
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| CN201910620489.5A CN110388769B (en) | 2019-07-10 | 2019-07-10 | Control method and control system of electronic expansion valve |
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| CN111216513A (en) * | 2020-01-15 | 2020-06-02 | 珠海格力电器股份有限公司 | Air conditioner temperature compensation control method, storage medium and air conditioner |
| CN111380147A (en) * | 2020-03-30 | 2020-07-07 | 宁波奥克斯电气股份有限公司 | Variable frequency air conditioner overload control method and device and variable frequency air conditioner |
| CN111928454A (en) * | 2020-07-31 | 2020-11-13 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| WO2021004553A1 (en) * | 2019-07-10 | 2021-01-14 | 青岛海尔空调器有限总公司 | Method and system for controlling electronic expansion valve |
| CN113375319A (en) * | 2020-02-25 | 2021-09-10 | 青岛海尔空调电子有限公司 | Control method of fixed-frequency air conditioner in refrigeration state |
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| CN114838530A (en) * | 2022-02-28 | 2022-08-02 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner electronic expansion valve, air conditioner and storage medium |
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| CN114838530A (en) * | 2022-02-28 | 2022-08-02 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner electronic expansion valve, air conditioner and storage medium |
| CN115111826A (en) * | 2022-06-29 | 2022-09-27 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and device and air conditioning system |
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| Publication number | Publication date |
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| CN110388769B (en) | 2021-09-21 |
| WO2021004553A1 (en) | 2021-01-14 |
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