CN104566839B - The control method of air-conditioning system air injection enthalpy-increasing - Google Patents
The control method of air-conditioning system air injection enthalpy-increasing Download PDFInfo
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- CN104566839B CN104566839B CN201510054531.3A CN201510054531A CN104566839B CN 104566839 B CN104566839 B CN 104566839B CN 201510054531 A CN201510054531 A CN 201510054531A CN 104566839 B CN104566839 B CN 104566839B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The invention provides a kind of control method of air-conditioning system air injection enthalpy-increasing, control method includes：The pressure of system is detected, the first pressure data of system are obtained；Adjust the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor according to first pressure data.The control method provided by the present invention, can solve the problem that degree of regulation is poor in the prior art, the unconspicuous problem of enthalpy-increasing effect.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of control method of air-conditioning system air injection enthalpy-increasing.
Background technology
At present, with the continuous improvement that consumer is required quality of the life, the air-conditioning products demand to high energy efficiency increasingly increases
It is long.The air-conditioning system heated as a kind of high energy efficiency and high water temperature, the position that air injection enthalpy-increasing air-conditioning system is occupied in air adjustment
Put more and more important.
The control method of air injection enthalpy-increasing air-conditioning system typically detects associated temperature parameter by temperature-sensitive bag in the prior art,
And throttled by capillary, with the increasing enthalpy amount of control system.Reference is used as by temperature parameter in the prior art, it is adjusted
Low precision, enthalpy-increasing effect is not obvious.
The content of the invention
It is a primary object of the present invention to provide a kind of control method of air-conditioning system air injection enthalpy-increasing, to solve prior art
Middle degree of regulation is poor, the unconspicuous problem of enthalpy-increasing effect.
To achieve these goals, a kind of control method of the air-conditioning system air injection enthalpy-increasing provided according to the present invention, control
Method includes：The pressure of system is detected, the first pressure data of system are obtained；Electronics is adjusted according to first pressure data
The aperture of expansion valve is to adjust the increasing enthalpy amount of compressor.
Further, detected in the pressure to system, in the step of obtaining the first pressure data of system：
The same time carries out pressure detecting to many places of system, obtains the pressure data of many places, and first pressure data include
The pressure data of many places.
Further, according to the step of the increasing enthalpy amount of first pressure data point reuse compressor：
The same time carries out pressure detecting to many places of system, obtain respectively the high-pressure data of system, middle pressure data and
Low pressure data, first pressure data include high-pressure data, middle pressure data and low pressure data；
According to high-pressure data, middle pressure data and low pressure data, the first intermediate pressure degree of reaching of acquisition system is calculated；
The aperture of electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing enthalpy amount of compressor.
Further, the aperture of electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing of compressor
Enthalpy amount includes：
The span to the intermediate pressure degree of reaching of system is divided in advance, obtains multiple operation intervals；
Operation interval according to residing for the first intermediate pressure degree of reaching, selects corresponding adjustable strategies to adjust compressor
Increasing enthalpy amount.
Further, electric expansion valve includes one-stage expansion valve and compound expansion valve, according to the first intermediate pressure degree of reaching
The aperture of electric expansion valve is adjusted, is included with the increasing enthalpy amount for adjusting compressor：One-level is adjusted according to the first intermediate pressure degree of reaching
The aperture of electric expansion valve adjusts the increasing enthalpy amount of compressor；
According to the first intermediate pressure degree of reaching adjust electric expansion valve aperture, with adjust compressor increasing enthalpy amount it
Afterwards, control method also includes：Again the pressure of system is detected, obtains the second pressure data of system；To the temperature of system
Degree is detected, obtains the temperature data of system；Secondary electrons are adjusted according to the second pressure data and temperature data of system
The aperture of expansion valve, to adjust the suction superheat of compressor.
Further, second pressure data include the second low pressure data, and saturation temperature includes low pressure saturation temperature, temperature number
According to including suction temperature and environment temperature, secondary electrons expansion is being adjusted according to the second pressure data and temperature data of system
In the step of aperture of valve, suction superheat to adjust compressor：
According to the second low pressure data, low pressure saturation temperature is obtained；
The aperture of secondary electrons expansion valve is adjusted according to low pressure saturation temperature, suction temperature and environment temperature, to adjust
The suction superheat of compressor.
Further, opening for secondary electrons expansion valve is being adjusted according to the second pressure data and temperature data of system
After degree, the suction superheat to adjust compressor, control method also includes：
Again the pressure of system is detected, obtains the 3rd pressure data of system；
According to the 3rd pressure data of system, the second intermediate pressure degree of reaching is obtained；
Judge whether the second intermediate pressure degree of reaching is in preset range；
If the second intermediate pressure degree of reaching is in preset range, adjusted according to the 3rd pressure data and temperature data
The aperture of secondary electrons expansion valve, to adjust the suction superheat of compressor；
If the second intermediate pressure degree of reaching is not at preset range, one-level is adjusted according to the second intermediate pressure degree of reaching
The aperture of electric expansion valve adjusts the increasing enthalpy amount of compressor；Again the pressure of system is detected, obtains the 4th of system
Pressure data；Temperature to system is detected, obtains the temperature data of system；According to the 4th pressure data and temperature of system
Degrees of data adjusts the aperture of secondary electrons expansion valve, to adjust the suction superheat of compressor.
Further, if the second intermediate pressure degree of reaching is not at preset range, reached according to the second intermediate pressure
The aperture of degree regulation one-level electric expansion valve includes to adjust the increasing enthalpy amount of compressor：
If the second intermediate pressure degree of reaching is less than preset range, one-level electricity is increased according to the second intermediate pressure degree of reaching
The aperture of sub- expansion valve；
If the second intermediate pressure degree of reaching is more than preset range, one-level electricity is reduced according to the second intermediate pressure degree of reaching
The aperture of sub- expansion valve.
Apply the technical scheme of the present invention, detected by the pressure to system, and the number pressure obtained according to detection
According to the aperture of adjustment electric expansion valve, to adjust the control method of compressor increasing enthalpy amount, it is possible to increase the control of air injection enthalpy-increasing system
Accuracy processed, enhancing enthalpy-increasing effect, and then the overall performance of unit can be improved.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the flow chart of the control method of the air-conditioning system air injection enthalpy-increasing provided according to embodiments of the present invention；
Fig. 2 shows the control for the air-conditioning system air injection enthalpy-increasing that the another embodiment provided according to embodiments of the present invention is provided
The flow chart of method；
Fig. 3 shows the control for the air-conditioning system air injection enthalpy-increasing that the another embodiment provided according to embodiments of the present invention is provided
The flow chart of method；
Fig. 4 shows the control for the air-conditioning system air injection enthalpy-increasing that the another embodiment provided according to embodiments of the present invention is provided
The flow chart of method；
Fig. 5 shows the control for the air-conditioning system air injection enthalpy-increasing that the another embodiment provided according to embodiments of the present invention is provided
The flow chart of method；
Fig. 6 shows the structural representation of the air-conditioning system provided according to embodiments of the present invention.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
10th, compressor；21st, the first electric expansion valve；22nd, the second electric expansion valve；41st, high pressure sensor；42nd, middle pressure is passed
Sensor；43rd, low pressure sensor；50th, temperature-sensitive bag.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figures 1 to 6, the invention provides a kind of control method of air-conditioning system air injection enthalpy-increasing, the control method
Including：
S101, is detected to the pressure of system, obtains the first pressure data of system；
S102, adjusts the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor 10 according to first pressure data.
Detected by the pressure to system, and the pressure data obtained according to detection adjusts opening for electric expansion valve
Degree, to adjust the control method of the increasing enthalpy amount of compressor 10, it is possible to increase control accuracy, the enhancing increasing enthalpy effect of air injection enthalpy-increasing system
Really, and then the overall performance of unit can be improved.Wherein, in embodiments of the present invention, under refrigeration mode, the first electric expansion valve
21 represent one-level electric expansion valve, and the second electric expansion valve 22 is expressed as secondary electrons expansion valve；In a heating mode, the first electricity
Sub- expansion valve 21 represents secondary electrons expansion valve, and the second electric expansion valve 22 represents one-level electric expansion valve.
Wherein, specifically included in S101 steps：Pressure detecting is carried out to many places of system in the same time, many places are obtained
Pressure data, first pressure data include the pressure data of many places.By the pressure data of many places in detecting system, and with many places
Pressure data as adjustment increasing enthalpy amount reference value, can equalizing system it is overall, make regulating effect more stable.
As shown in Fig. 2 in the present embodiment, S101 steps may also comprise following operating procedure：
S201, the same time carries out pressure detecting to many places of system, and the high-pressure data of system, middle pressure data are obtained respectively
And low pressure data, first pressure data include high-pressure data, middle pressure data and low pressure data；
S202, according to high-pressure data, middle pressure data and low pressure data, the first intermediate pressure for calculating acquisition system is reached
Degree；
S203, the aperture of electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing enthalpy of compressor 10
Amount.
Wherein, in the present embodiment, intermediate pressure degree of reaching passes through KrRepresent, high-pressure data is PIt is high, middle pressure data are PIn,
Low pressure data is PIt is low.Intermediate pressure degree of reaching Kr=a*PIn/(PIt is high*PIt is low)0.5, a is definite value.High-pressure data PIt is high, middle pressure data PIn,
Low pressure data PIt is lowMeasured respectively by high pressure sensor 41, middle pressure sensor 42, low pressure sensor 43.Pass through the high pressure number measured
Calculated according to, middle pressure data and low pressure data after intermediate pressure degree of reaching, according to the value of intermediate pressure degree of reaching, adjustment pressure
The increasing enthalpy amount size of contracting machine 10.
As shown in figure 3, specifically, the aperture of electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust pressure
The increasing enthalpy amount of contracting machine 10 includes：
S301, in advance the span to the intermediate pressure degree of reaching of system divide, obtain multiple operation intervals；
S302, the operation interval according to residing for the first intermediate pressure degree of reaching selects corresponding adjustable strategies to adjust pressure
The increasing enthalpy amount of contracting machine 10.
The span of the intermediate pressure degree of reaching of system divide in advance and obtains multiple operation intervals, according to calculating
The the first intermediate pressure degree of reaching obtained, out of, multiple operation intervals that divide in advance, finds the operation interval where correspondence, so
Corresponding adjustable strategies are selected afterwards to adjust the increasing enthalpy amount of compressor 10.By setting multiple operation intervals, and the different works of correspondence
Different adjustable strategies are taken as interval, the increasing enthalpy amount steady change of compressor 10 is so ensure that.Wherein, the division of operation interval
It can be evenly dividing, median also can be first set, nearer apart from median, the number range of operation interval is smaller, apart from median
More remote, the number range of operation interval is bigger, for example, median be 10, its operation interval can be divided into (2,7), (7,9), (9,
10), (10,11), (11,13), (13,18), and correspondingly, the change of corresponding compressor 10 increasing enthalpy amount smaller apart from median
Change value is smaller, and bigger apart from median, the changing value of the corresponding increasing enthalpy amount of compressor 10 is bigger.It can so accomplish to deviate in setting
Between when being worth larger, accomplish quick regulation, when its deviation setting median is smaller, accomplish to fine-tune.Wherein, if increasing enthalpy amount
Changing value exceedes the adjustable range of electric expansion valve, then is adjusted in regulation by the maximum of electric expansion valve.
In the present embodiment, electric expansion valve includes one-stage expansion valve and compound expansion valve.Reached according to the first intermediate pressure
The increasing enthalpy amount of compressor 10 is adjusted into the aperture of degree regulation one-level electric expansion valve；
As shown in figure 4, the aperture of electric expansion valve is being adjusted according to the first intermediate pressure degree of reaching, to adjust compressor 10
Increasing enthalpy amount after, control method also includes：
S103, is detected to the pressure of system again, obtains the second pressure data of system；
S104, the temperature to system is detected, obtains the temperature data of system；
S105, the aperture of secondary electrons expansion valve is adjusted according to the second pressure data and temperature data of system, to adjust
The suction superheat of whole compressor 10.
Wherein, by above-mentioned steps, after second pressure data and system temperature data are got, secondary electrons are adjusted
Expansion valve, to adjust the suction superheat of compressor 10, can so make the pressure in increasing enthalpy formula reservoir be maintained at optimal shape
State, makes the suction superheat of compressor 10 match with the increasing enthalpy amount of compressor 10, systematic entirety is maintained stable shape
State, Energy Efficiency Ratio reaches preferable state.
Specifically, second pressure data include the second low pressure data, and saturation temperature includes low pressure saturation temperature, temperature data
Including suction temperature and environment temperature, the suction temperature is measured by temperature-sensitive bag 50.The second pressure data according to system with
And during temperature data is the step of adjust the aperture of secondary electrons expansion valve, suction superheat to adjust compressor 10, specific bag
Include following steps：
S401, according to the second low pressure data, obtains low pressure saturation temperature；
S402, the aperture of secondary electrons expansion valve is adjusted according to low pressure saturation temperature, suction temperature and environment temperature, with
Adjust the suction superheat of compressor 10.
Wherein, the variable quantity of the aperture of secondary electrons expansion valve is △ P, and low pressure saturation temperature is TIt is low, suction temperature is TInhale,
Environment temperature is TRing, actual degree of superheat T1=TInhale- TIt is low, target superheat degree is T2, calculate T2When, in advance by the scope of environment temperature
Multiple intervals are divided into, one target superheat angle value T of each interval correspondence2, environment temperature TRingIn some interval, then target mistake
Hot value T2For analog value, the variable quantity of the aperture of secondary electrons expansion valve passes through below equation：△ P=b* (T1- T2), meter
The value for the variable quantity for obtaining aperture is calculated, the aperture of secondary electrons expansion valve is adjusted by the value.Correspondingly, if the variable quantity of aperture
Value exceed secondary electrons expansion valve adjustable range, then regulation when be adjusted i.e. by the maximum of secondary electrons expansion valve
Can.
In the present embodiment, secondary electrons expansion valve is being adjusted according to the second pressure data and temperature data of system
After aperture, the suction superheat to adjust compressor 10, control method also includes：
S106, is detected to the pressure of system again, obtains the 3rd pressure data of system；
S107, according to the 3rd pressure data of system, obtains the second intermediate pressure degree of reaching；
S108, judges whether the second intermediate pressure degree of reaching is in preset range；
If the second intermediate pressure degree of reaching is in preset range, adjusted according to the 3rd pressure data and temperature data
The aperture of secondary electrons expansion valve, to adjust the suction superheat of compressor 10；
If the second intermediate pressure degree of reaching is not at preset range, one-level is adjusted according to the second intermediate pressure degree of reaching
The aperture of electric expansion valve adjusts the increasing enthalpy amount of compressor 10；Again the pressure of system is detected, obtains the of system
Four pressure datas；Temperature to system is detected, obtains the temperature data of system；According to the 4th pressure data of system and
Temperature data adjusts the aperture of secondary electrons expansion valve, to adjust the suction superheat of compressor 10.
Wherein, as shown in figure 5, in the present embodiment, obtaining first pressure data, second pressure data, the 3rd number pressure
According to this and the 4th pressure data time interval it is identical, i.e. section at regular intervals detects a pressure data, and judge the pressure
Whether the intermediate pressure degree of reaching that force data is obtained is in preset range, if in preset range, with secondary number pressure accordingly
According to the suction superheat of adjustment compressor 10；If the intermediate pressure degree of reaching that the pressure data is obtained is not at preset range,
Then by the increasing enthalpy amount of one-level electronic expansion valve regulation compressor 10, after the completion of regulation, the intermediate pressure after regulation is judged again
Whether power degree of reaching is in preset range, if meeting, the suction superheat of machine 10 is compressed according to the pressure data after regulation
The regulation of the regulation of degree, i.e. secondary electrons expansion valve, if not meeting, adjusts the increasing enthalpy amount of compressor 10, until being surveyed again
Intermediate pressure degree of reaching be in preset range, then be compressed the regulation of the suction superheat of machine 10.Specifically, if measured
Intermediate pressure degree of reaching be less than preset range, then increasing one-level electric expansion valve according to the second intermediate pressure degree of reaching opening
Degree, if the second intermediate pressure degree of reaching is more than preset range, reduces one-level electronics swollen according to the second intermediate pressure degree of reaching
The aperture of swollen valve.Similarly, when the suction superheat of compressor 10 is adjusted, it is also desirable to judge the compressor 10 after adjustment
Suction superheat whether meet the second preset range value, the suction superheat of the compressor 10 after adjustment meets second and preset
During value range, then secondary electrons expansion valve maintains existing aperture, and the suction superheat of the compressor 10 after adjustment is less than second
During preset range value, reducing the suction superheat of the compressor 10 after secondary electrons expansion valve opening, and judgement this time adjustment is
The second preset range value of no satisfaction；If the suction superheat of the compressor 10 after adjustment is more than the second preset range value, accordingly
It is pre- whether the suction superheat of the compressor 10 after ground increase secondary electrons expansion valve opening, and judgement this time adjustment meets second
If value range.Due to the intermediate pressure degree of reaching of system can be influenceed when adjusting the suction superheat of compressor 10, specifically, when
When secondary electrons expansion valve opening reduces, intermediate pressure degree of reaching can be increased；When secondary electrons expansion valve opening increases, it can drop
Low intermediate pressure degree of reaching.Therefore, after the regulation of secondary electrons expansion valve opening has been carried out, then return to one-level electric expansion valve
Regulation, the pressure of system is detected again, so circulation, make the increasing enthalpy amount of compressor 10 and the air-breathing mistake of compressor 10
Temperature reaches dynamic equilibrium.
By control method provided in an embodiment of the present invention, machine is compressed as reference quantity using pressure data in system
The adjustment of 10 increasing enthalpy amounts, can so improve the control accuracy and response speed of increasing enthalpy amount, improve system enthalpy-increasing effect, by adjusting
The suction superheat of whole compressor 10, the suction superheat and the increasing enthalpy amount of compressor 10 for making compressor 10 reaches dynamic equilibrium, such as
This enables to systematic function and Energy Efficiency Ratio reaches optimum state, and then promotes the reliability of system overall operation.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (6)
1. a kind of control method of air-conditioning system air injection enthalpy-increasing, it is characterised in that the control method includes：
The pressure of system is detected, the first pressure data of the system are obtained；
Adjust the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor according to the first pressure data；
According to the step of the increasing enthalpy amount of the first pressure data point reuse compressor：
The same time carries out pressure detecting to many places of the system, and the high-pressure data of the system, middle pressure data are obtained respectively
And low pressure data, the first pressure data include the high-pressure data, medium pressure data and the low pressure data；
According to the high-pressure data, medium pressure data and the low pressure data, the first intermediate pressure for obtaining the system is calculated
Power degree of reaching；
The aperture of the electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing enthalpy of the compressor
Amount.
2. the control method of air-conditioning system air injection enthalpy-increasing according to claim 1, it is characterised in that according in described first
Between pressure degree of reaching adjust the aperture of the electric expansion valve, included with the increasing enthalpy amount for adjusting the compressor：
The span to the intermediate pressure degree of reaching of the system is divided in advance, obtains multiple operation intervals；
Operation interval according to residing for the first intermediate pressure degree of reaching, selects corresponding adjustable strategies to adjust the compression
The increasing enthalpy amount of machine.
3. the control method of air-conditioning system air injection enthalpy-increasing according to claim 1, it is characterised in that the electric expansion valve
Including one-stage expansion valve and compound expansion valve,
The aperture of the electric expansion valve is adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing enthalpy of the compressor
Amount includes：Adjust the aperture of the one-level electric expansion valve to adjust the compressor according to the first intermediate pressure degree of reaching
Increasing enthalpy amount；
The aperture of the electric expansion valve is being adjusted according to the first intermediate pressure degree of reaching, to adjust the increasing of the compressor
After enthalpy amount, the control method also includes：Again the pressure of the system is detected, obtains the second pressure of the system
Force data；Temperature to the system is detected, obtains the temperature data of the system；According to the second pressure of the system
Data and the temperature data adjust the aperture of the secondary electrons expansion valve, to adjust the suction superheat of compressor.
4. the control method of air-conditioning system air injection enthalpy-increasing according to claim 3, it is characterised in that the second pressure number
According to including the second low pressure data, saturation temperature includes low pressure saturation temperature, and the temperature data includes suction temperature and environment temperature
Degree, the aperture of the secondary electrons expansion valve is adjusted in the second pressure data according to the system and the temperature data,
In the step of suction superheat to adjust compressor：
According to second low pressure data, the low pressure saturation temperature is obtained；
The secondary electrons expansion valve is adjusted according to the low pressure saturation temperature, the suction temperature and the environment temperature
Aperture, to adjust the suction superheat of the compressor.
5. the control method of air-conditioning system air injection enthalpy-increasing according to claim 3, it is characterised in that according to the system
Second pressure data and the temperature data adjust the aperture of the secondary electrons expansion valve, to adjust the air-breathing of compressor
After the degree of superheat, the control method also includes：
Again the pressure of the system is detected, obtains the 3rd pressure data of the system；
According to the 3rd pressure data of the system, the second intermediate pressure degree of reaching is obtained；
Judge whether the second intermediate pressure degree of reaching is in preset range；
If the second intermediate pressure degree of reaching is in the preset range, according to the 3rd pressure data and described
Temperature data adjusts the aperture of the secondary electrons expansion valve, to adjust the suction superheat of the compressor；
If the second intermediate pressure degree of reaching is not at the preset range, according to the second intermediate pressure degree of reaching
The aperture of the one-level electric expansion valve is adjusted to adjust the increasing enthalpy amount of the compressor；Again the pressure of the system is carried out
Detection, obtains the 4th pressure data of the system；Temperature to the system is detected, obtains the temperature number of the system
According to；The aperture of the secondary electrons expansion valve is adjusted according to the 4th pressure data of the system and the temperature data, with
Adjust the suction superheat of compressor.
6. the control method of air-conditioning system air injection enthalpy-increasing according to claim 5, it is characterised in that if in described second
Between pressure degree of reaching be not at the preset range, then it is swollen to adjust the one-level electronics according to the second intermediate pressure degree of reaching
The aperture of swollen valve includes to adjust the increasing enthalpy amount of the compressor：
If the second intermediate pressure degree of reaching is less than the preset range, increased according to the second intermediate pressure degree of reaching
The aperture of the big one-level electric expansion valve；
If the second intermediate pressure degree of reaching is more than the preset range, subtracted according to the second intermediate pressure degree of reaching
The aperture of the small one-level electric expansion valve.
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| CN105091427B (en) * | 2015-08-07 | 2018-12-07 | 珠海格力电器股份有限公司 | The control method and air conditioner of Two-stage Compression second vapor injection system electronic expansion valve |
| CN105180540B (en) * | 2015-10-14 | 2018-11-30 | 珠海格力电器股份有限公司 | A kind of the compressor exhaust temperature control method and system of low-temp. spraying enthalpy heat-flash unit |
| CN106196721B (en) * | 2016-07-04 | 2018-02-16 | 珠海格力电器股份有限公司 | One kind spray enthalpy compressor air-conditioning system and its control method |
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