CN104566839A - Control method for enhanced vapor injection of air conditioning system - Google Patents
Control method for enhanced vapor injection of air conditioning system Download PDFInfo
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- CN104566839A CN104566839A CN201510054531.3A CN201510054531A CN104566839A CN 104566839 A CN104566839 A CN 104566839A CN 201510054531 A CN201510054531 A CN 201510054531A CN 104566839 A CN104566839 A CN 104566839A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004378 air conditioning Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method of enhanced vapor injection of an air conditioning system, which comprises the following steps: detecting the pressure of a system to obtain first pressure data of the system; and adjusting the opening degree of the electronic expansion valve according to the first pressure data to adjust the enthalpy increasing amount of the compressor. The control method provided by the invention can solve the problems of poor adjustment precision and unobvious enthalpy-increasing effect in the prior art.
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, what require quality of the life along with consumer improves constantly, growing to the air-conditioning products demand of high energy efficiency.As the air-conditioning system that a kind of high energy efficiency and high water temperature heat, the position that air injection enthalpy-increasing air-conditioning system occupies in air conditioning is more and more important.
In prior art, the control method of air injection enthalpy-increasing air-conditioning system generally detects associated temperature parameter by temperature-sensitive bag, and carries out throttling by capillary, with the increasing enthalpy amount of control system.In prior art by temperature parameter as a reference, its degree of regulation is poor, increases enthalpy DeGrain.
Summary of the invention
Main purpose of the present invention is the control method providing a kind of air-conditioning system air injection enthalpy-increasing, poor to solve degree of regulation in prior art, increases the problem of enthalpy DeGrain.
To achieve these goals, according to the control method of a kind of air-conditioning system air injection enthalpy-increasing provided by the invention, control method comprises: detect the pressure of system, obtains the first pressure data of system; Regulate the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor according to the first pressure data.
Further, the pressure of system is being detected, is obtaining in the step of the first pressure data of system:
The same time carries out pressure detecting to the many places of system, and obtain the pressure data of many places, the first pressure data comprises the pressure data of many places.
Further, in the step of the increasing enthalpy amount according to the first pressure data adjustment compressor:
The same time carries out pressure detecting to the many places of system, obtains the high-pressure data of system, middle pressure data and low pressure data respectively, and the first pressure data comprises high-pressure data, middle pressure data and low pressure data;
According to high-pressure data, middle pressure data and low pressure data, calculate the first intermediate pressure degree of reaching of acquisition system;
The aperture of electric expansion valve is regulated, to adjust the increasing enthalpy amount of compressor according to the first intermediate pressure degree of reaching.
Further, regulate the aperture of electric expansion valve according to the first intermediate pressure degree of reaching, comprise with the increasing enthalpy amount adjusting compressor:
In advance the span of the intermediate pressure degree of reaching of system is divided, obtain multiple operation interval;
According to the operation interval residing for the first intermediate pressure degree of reaching, corresponding adjustable strategies is selected to adjust the increasing enthalpy amount of compressor.
Further, electric expansion valve comprises one-stage expansion valve and compound expansion valve, regulate the aperture of electric expansion valve according to the first intermediate pressure degree of reaching, comprise with the increasing enthalpy amount adjusting compressor: regulate the aperture of one-level electric expansion valve to adjust the increasing enthalpy amount of compressor according to the first intermediate pressure degree of reaching;
Regulating the aperture of electric expansion valve according to the first intermediate pressure degree of reaching, after the increasing enthalpy amount adjusting compressor, control method also comprises: again detect the pressure of system, obtains the second pressure data of system; The temperature of system is detected, obtains the temperature data of system; According to the second pressure data of system and the aperture of temperature data adjustment secondary electrons expansion valve, to adjust the suction superheat of compressor.
Further, second pressure data comprises the second low pressure data, saturation temperature comprises low pressure saturation temperature, temperature data comprises suction temperature and environment temperature, the aperture of secondary electrons expansion valve is being regulated, to adjust in the step of the suction superheat of compressor according to the second pressure data of system and temperature data:
According to the second low pressure data, obtain low pressure saturation temperature;
The aperture of secondary electrons expansion valve is regulated, to adjust the suction superheat of compressor according to low pressure saturation temperature, suction temperature and environment temperature.
Further, regulating the aperture of secondary electrons expansion valve according to the second pressure data of system and temperature data, after the suction superheat adjusting compressor, control method also comprises:
Again the pressure of system is detected, obtain the 3rd pressure data of system;
According to the 3rd pressure data of system, obtain the second intermediate pressure degree of reaching;
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, then regulate the aperture of secondary electrons expansion valve according to the 3rd pressure data and temperature data, to adjust the suction superheat of compressor;
If the second intermediate pressure degree of reaching is not in preset range, then the aperture of one-level electric expansion valve is regulated to adjust the increasing enthalpy amount of compressor according to the second intermediate pressure degree of reaching; Again the pressure of system is detected, obtain the 4th pressure data of system; The temperature of system is detected, obtains the temperature data of system; According to the 4th pressure data of system and the aperture of temperature data adjustment secondary electrons expansion valve, to adjust the suction superheat of compressor.
Further, if the second intermediate pressure degree of reaching is not in preset range, then the increasing enthalpy amount regulating the aperture of one-level electric expansion valve to adjust compressor according to the second intermediate pressure degree of reaching comprises:
If the second intermediate pressure degree of reaching is less than preset range, then increase the aperture of one-level electric expansion valve according to the second intermediate pressure degree of reaching;
If the second intermediate pressure degree of reaching is greater than preset range, then reduce the aperture of one-level electric expansion valve according to the second intermediate pressure degree of reaching.
Apply technical scheme of the present invention, by detecting the pressure of system, and according to detecting the aperture of the pressure data adjustment electric expansion valve obtained, to adjust the control method that compressor increases enthalpy amount, the control accuracy of air injection enthalpy-increasing system can be improved, strengthen enthalpy effect, and then the performance of unit entirety can be improved.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form 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 the embodiment of the present invention;
The flow chart of the control method of the air-conditioning system air injection enthalpy-increasing that the another embodiment that Fig. 2 shows to be provided according to the embodiment of the present invention provides;
The flow chart of the control method of the air-conditioning system air injection enthalpy-increasing that the another embodiment that Fig. 3 shows to be provided according to the embodiment of the present invention provides;
The flow chart of the control method of the air-conditioning system air injection enthalpy-increasing that the another embodiment that Fig. 4 shows to be provided according to the embodiment of the present invention provides;
The flow chart of the control method of the air-conditioning system air injection enthalpy-increasing that the another embodiment that Fig. 5 shows to be provided according to the embodiment of the present invention provides;
Fig. 6 shows the structural representation of the air-conditioning system provided according to the embodiment of the present invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, compressor; 21, the first electric expansion valve; 22, the second electric expansion valve; 41, high pressure sensor; 42, middle pressure sensor; 43, low pressure sensor; 50, temperature-sensitive bag.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail 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, this control method comprises:
S101, detects the pressure of system, obtains the first pressure data of system;
S102, regulates the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor 10 according to the first pressure data.
By detecting the pressure of system, and according to detecting the aperture of the pressure data adjustment electric expansion valve obtained, to adjust the control method that compressor 10 increases enthalpy amount, the control accuracy of air injection enthalpy-increasing system can be improved, strengthen increasing enthalpy effect, and then the performance of unit entirety can be improved.Wherein, in embodiments of the present invention, under refrigeration mode, the first electric expansion valve 21 represents 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 electric expansion valve 21 represents secondary electrons expansion valve, and the second electric expansion valve 22 represents one-level electric expansion valve.
Wherein, specifically comprise in S101 step: carry out pressure detecting to the many places of system at one time, obtain the pressure data of many places, the first pressure data comprises the pressure data of many places.By the pressure data of many places in detection system, and increase the reference value of enthalpy amount using many places pressure data as adjustment, can equalizing system overall, make regulating effect more stable.
As shown in Figure 2, in the present embodiment, S101 step also can comprise following operating procedure:
S201, the same time carries out pressure detecting to the many places of system, obtains the high-pressure data of system, middle pressure data and low pressure data respectively, and the first pressure data comprises high-pressure data, middle pressure data and low pressure data;
S202, according to high-pressure data, middle pressure data and low pressure data, calculates the first intermediate pressure degree of reaching of acquisition system;
S203, regulates the aperture of electric expansion valve, to adjust the increasing enthalpy amount of compressor 10 according to the first intermediate pressure degree of reaching.
Wherein, in the present embodiment, intermediate pressure degree of reaching passes through K
rrepresent, high-pressure data is P
high, middle pressure data are P
in, low pressure data is P
low.Intermediate pressure degree of reaching K
r=a*P
in/ (P
high* P
low)
0.5, a is definite value.High-pressure data P
high, middle pressure data P
in, low pressure data P
lowrecord respectively by high pressure sensor 41, middle pressure sensor 42, low pressure sensor 43.After calculating intermediate pressure degree of reaching by the high-pressure data recorded, middle pressure data and low pressure data, according to the value of intermediate pressure degree of reaching, the increasing enthalpy amount size of adjustment compressor 10.
As shown in Figure 3, particularly, regulate the aperture of electric expansion valve according to the first intermediate pressure degree of reaching, comprise with the increasing enthalpy amount adjusting compressor 10:
S301, divides the span of the intermediate pressure degree of reaching of system in advance, obtains multiple operation interval;
S302, according to the operation interval residing for the first intermediate pressure degree of reaching, selects corresponding adjustable strategies to adjust the increasing enthalpy amount of compressor 10.
The span of the intermediate pressure degree of reaching of system is divided in advance and obtains multiple operation interval, according to calculating the first intermediate pressure degree of reaching obtained, from in the multiple operation intervals divided in advance, find the operation interval at corresponding place, then select corresponding adjustable strategies to adjust the increasing enthalpy amount of compressor 10.By arranging multiple operation interval, and different adjustable strategies is taked in corresponding different operating interval, so can ensure that compressor 10 increases enthalpy amount steady change.Wherein, the division of operation interval can evenly divide, also first median can be set, distance median is nearer, the number range of operation interval is less, distance median is far away, the number range of operation interval is larger, such as, median is 10, its operation interval can be divided into (2, 7), (7, 9), (9, 10), (10, 11), (11, 13), (13, 18), and correspondingly, distance median is less, the changing value that corresponding compressor 10 increases enthalpy amount is less, distance median is larger, the changing value that corresponding compressor 10 increases enthalpy amount is larger.So can accomplish to depart from setting median larger time, accomplish quick adjustment, when its depart from setting median less time, accomplish meticulous adjustment.Wherein, if the changing value increasing enthalpy amount exceedes the adjustable range of electric expansion valve, then undertaken regulating by the maximum of electric expansion valve when regulating.
In the present embodiment, electric expansion valve comprises one-stage expansion valve and compound expansion valve.The aperture of one-level electric expansion valve is regulated to adjust the increasing enthalpy amount of compressor 10 according to the first intermediate pressure degree of reaching;
As shown in Figure 4, regulating the aperture of electric expansion valve according to the first intermediate pressure degree of reaching, after the increasing enthalpy amount adjusting compressor 10, control method also comprises:
S103, detects the pressure of system again, obtains the second pressure data of system;
S104, detects the temperature of system, obtains the temperature data of system;
S105, according to the second pressure data of system and the aperture of temperature data adjustment secondary electrons expansion valve, to adjust the suction superheat of compressor 10.
Wherein, pass through above-mentioned steps, after getting the second pressure data and system temperature data, regulate secondary electrons expansion valve, to adjust the suction superheat of compressor 10, the pressure in increasing enthalpy formula reservoir so can be made to remain on optimum state, the increasing enthalpy amount of the suction superheat of compressor 10 and compressor 10 is matched, make entire system performance maintain stable state, Energy Efficiency Ratio reaches better state.
Particularly, the second pressure data comprises the second low pressure data, and saturation temperature comprises low pressure saturation temperature, and temperature data comprises suction temperature and environment temperature, and this suction temperature is recorded by temperature-sensitive bag 50.According to the second pressure data of system and the aperture of temperature data adjustment secondary electrons expansion valve, to adjust in the step of the suction superheat of compressor 10, specifically comprise the steps:
S401, according to the second low pressure data, obtains low pressure saturation temperature;
S402, regulates the aperture of secondary electrons expansion valve, to adjust the suction superheat of compressor 10 according to low pressure saturation temperature, suction temperature and environment temperature.
Wherein, the variable quantity of the aperture of secondary electrons expansion valve is △ P, and low pressure saturation temperature is T
low, suction temperature is T
inhale, environment temperature is T
ring, actual degree of superheat T
1=T
inhale-T
low, target superheat degree is T
2, calculate T
2time, in advance the scope of environment temperature is divided into multiple interval, each interval corresponding target superheat angle value T
2, environment temperature T
ringin certain interval, then target superheat angle value T
2for analog value, the variable quantity of the aperture of secondary electrons expansion valve, by following formula: △ P=b* (T
1-T
2), calculate the value of the variable quantity of aperture, regulated the aperture of secondary electrons expansion valve by this value.Correspondingly, if the value of the variable quantity of aperture exceedes the adjustable range of secondary electrons expansion valve, then undertaken regulating by the maximum of secondary electrons expansion valve when regulating.
In the present embodiment, regulating the aperture of secondary electrons expansion valve according to the second pressure data of system and temperature data, after the suction superheat adjusting compressor 10, control method also comprises:
S106, detects 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, then regulate the aperture of secondary electrons expansion valve according to the 3rd pressure data and temperature data, to adjust the suction superheat of compressor 10;
If the second intermediate pressure degree of reaching is not in preset range, then the aperture of one-level electric expansion valve is regulated to adjust the increasing enthalpy amount of compressor 10 according to the second intermediate pressure degree of reaching; Again the pressure of system is detected, obtain the 4th pressure data of system; The temperature of system is detected, obtains the temperature data of system; According to the 4th pressure data of system and the aperture of temperature data adjustment secondary electrons expansion valve, to adjust the suction superheat of compressor 10.
Wherein, as shown in Figure 5, in the present embodiment, the time interval obtaining the first pressure data, the second pressure data, the 3rd pressure data and the 4th pressure data is identical, i.e. section at regular intervals, detects a pressure data, and judges whether the intermediate pressure degree of reaching that this pressure data obtains is in preset range, if be in preset range, then follow the suction superheat of secondary pressure data adjustment compressor 10 accordingly, if the intermediate pressure degree of reaching that this pressure data obtains is not in preset range, then by the increasing enthalpy amount of one-level electronic expansion valve regulation compressor 10, after adjustment completes, whether the intermediate pressure degree of reaching after again judging to regulate is in preset range, if meet, the adjustment of the suction superheat of compressor 10 is then carried out according to the pressure data after adjustment, the i.e. adjustment of secondary electrons expansion valve, if do not meet, then again adjust the increasing enthalpy amount of compressor 10, until the intermediate pressure degree of reaching surveyed is in preset range, carry out the adjustment of the suction superheat of compressor 10 again.Particularly, if the intermediate pressure degree of reaching recorded is less than preset range, then increase the aperture of one-level electric expansion valve according to the second intermediate pressure degree of reaching, if the second intermediate pressure degree of reaching is greater than preset range, then reduce the aperture of one-level electric expansion valve according to the second intermediate pressure degree of reaching.Similarly, when the suction superheat of adjustment compressor 10, also the suction superheat judging the compressor 10 after adjusting is needed whether to meet the second preset range value, when the suction superheat of the compressor 10 after adjusting meets the second preset range value, then secondary electrons expansion valve maintains existing aperture, when the suction superheat of the compressor 10 after adjusting is less than the second preset range value, reduce secondary electrons expansion valve opening, and judge whether the suction superheat of the compressor 10 after this time adjustment meets the second preset range value; If when the suction superheat of the compressor 10 after adjustment is greater than the second preset range value, correspondingly increase secondary electrons expansion valve opening, and judge whether the suction superheat of the compressor 10 after this time adjustment meets the second preset range value.Owing to the intermediate pressure degree of reaching of influential system when adjusting the suction superheat of compressor 10, particularly, when secondary electrons expansion valve opening reduces, intermediate pressure degree of reaching can be increased; When secondary electrons expansion valve opening increases, intermediate pressure degree of reaching can be reduced.Therefore, after having carried out the adjustment of secondary electrons expansion valve opening, then returned the adjustment to one-level electric expansion valve, again the pressure of system has been detected, so circulate, made the increasing enthalpy amount of compressor 10 and the suction superheat of compressor 10 reach dynamic equilibrium.
By the control method that the embodiment of the present invention provides, in employing system, pressure data carries out as with reference to amount the adjustment that compressor 10 increases enthalpy amount, so can improve the control accuracy and response speed that increase enthalpy amount, raising system increases enthalpy effect, by adjusting the suction superheat of compressor 10, make the suction superheat of compressor 10 and compressor 10 increase enthalpy amount and reach dynamic equilibrium, systematic function and Energy Efficiency Ratio so can be made to reach optimum state, and then facilitate entire system reliability of operation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a control method for air-conditioning system air injection enthalpy-increasing, is characterized in that, described control method comprises:
The pressure of system is detected, obtains the first pressure data of described system;
Regulate the aperture of electric expansion valve to adjust the increasing enthalpy amount of compressor according to described first pressure data.
2. the control method of air-conditioning system air injection enthalpy-increasing according to claim 1, is characterized in that, is detecting the pressure of system, obtains in the step of the first pressure data of described system:
The same time carries out pressure detecting to the many places of described system, and obtain the pressure data of many places, described first pressure data comprises the pressure data of described many places.
3. the control method of air-conditioning system air injection enthalpy-increasing according to claim 1, is characterized in that, in the step of the increasing enthalpy amount according to described first pressure data adjustment compressor:
The same time carries out pressure detecting to the many places of described system, obtains the high-pressure data of described system, middle pressure data and low pressure data respectively, and described first pressure data comprises described high-pressure data, described middle pressure data and described low pressure data;
According to described high-pressure data, described middle pressure data and described low pressure data, calculate the first intermediate pressure degree of reaching obtaining described system;
The aperture of described electric expansion valve is regulated, to adjust the increasing enthalpy amount of described compressor according to described first intermediate pressure degree of reaching.
4. the control method of air-conditioning system air injection enthalpy-increasing according to claim 3, is characterized in that, regulates the aperture of described electric expansion valve according to described first intermediate pressure degree of reaching, and comprises with the increasing enthalpy amount adjusting described compressor:
In advance the span of the intermediate pressure degree of reaching of described system is divided, obtain multiple operation interval;
According to the operation interval residing for described first intermediate pressure degree of reaching, corresponding adjustable strategies is selected to adjust the increasing enthalpy amount of described compressor.
5. the control method of air-conditioning system air injection enthalpy-increasing according to claim 3, is characterized in that, described electric expansion valve comprises one-stage expansion valve and compound expansion valve,
Regulate the aperture of described electric expansion valve according to described first intermediate pressure degree of reaching, comprise with the increasing enthalpy amount adjusting described compressor: regulate the aperture of described one-level electric expansion valve to adjust the increasing enthalpy amount of described compressor according to described first intermediate pressure degree of reaching;
Regulating the aperture of described electric expansion valve according to described first intermediate pressure degree of reaching, after the increasing enthalpy amount adjusting described compressor, described control method also comprises: again detect the pressure of described system, obtains the second pressure data of described system; The temperature of described system is detected, obtains the temperature data of described system; The aperture of described secondary electrons expansion valve is regulated, to adjust the suction superheat of compressor according to the second pressure data of described system and described temperature data.
6. the control method of air-conditioning system air injection enthalpy-increasing according to claim 5, it is characterized in that, described second pressure data comprises the second low pressure data, described saturation temperature comprises low pressure saturation temperature, described temperature data comprises suction temperature and environment temperature, the aperture of described secondary electrons expansion valve is being regulated, to adjust in the step of the suction superheat of compressor according to the second pressure data of described system and described temperature data:
According to described second low pressure data, obtain described low pressure saturation temperature;
The aperture of described secondary electrons expansion valve is regulated, to adjust the suction superheat of described compressor according to described low pressure saturation temperature, described suction temperature and described environment temperature.
7. the control method of air-conditioning system air injection enthalpy-increasing according to claim 5, it is characterized in that, the aperture of described secondary electrons expansion valve is being regulated according to the second pressure data of described system and described temperature data, after the suction superheat adjusting compressor, described control method also comprises:
Again the pressure of described system is detected, obtain the 3rd pressure data of described system;
According to the 3rd pressure data of described system, obtain the second intermediate pressure degree of reaching;
Judge whether described second intermediate pressure degree of reaching is in preset range;
If described second intermediate pressure degree of reaching is in described preset range, then regulate the aperture of described secondary electrons expansion valve according to described 3rd pressure data and described temperature data, to adjust the suction superheat of described compressor;
If described second intermediate pressure degree of reaching is not in described preset range, then the aperture of described one-level electric expansion valve is regulated to adjust the increasing enthalpy amount of described compressor according to described second intermediate pressure degree of reaching; Again the pressure of described system is detected, obtain the 4th pressure data of described system; The temperature of described system is detected, obtains the temperature data of described system; The aperture of described secondary electrons expansion valve is regulated, to adjust the suction superheat of compressor according to the 4th pressure data of described system and described temperature data.
8. the control method of air-conditioning system air injection enthalpy-increasing according to claim 7, it is characterized in that, if described second intermediate pressure degree of reaching is not in described preset range, then the increasing enthalpy amount regulating the aperture of described one-level electric expansion valve to adjust described compressor according to described second intermediate pressure degree of reaching comprises:
If described second intermediate pressure degree of reaching is less than described preset range, then increase the aperture of described one-level electric expansion valve according to described second intermediate pressure degree of reaching;
If described second intermediate pressure degree of reaching is greater than described preset range, then reduce the aperture of described one-level electric expansion valve according to described second intermediate pressure degree of reaching.
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| CN105091427A (en) * | 2015-08-07 | 2015-11-25 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve of double-stage compression middle air supply system and air conditioner |
| CN105180540A (en) * | 2015-10-14 | 2015-12-23 | 珠海格力电器股份有限公司 | Compressor exhaust temperature control method and system of low-temperature enthalpy-spraying intense heat unit |
| CN106196721A (en) * | 2016-07-04 | 2016-12-07 | 珠海格力电器股份有限公司 | Enthalpy-injection compressor air conditioning system and control method thereof |
| CN106556188A (en) * | 2016-11-29 | 2017-04-05 | 珠海格力电器股份有限公司 | Control method for refrigerant flow of air conditioning system |
| CN106801981A (en) * | 2017-02-04 | 2017-06-06 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioning, device and air-conditioning |
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| CN107084501B (en) * | 2017-05-19 | 2019-07-09 | 广东志高暖通设备股份有限公司 | A kind of control method of air injection enthalpy-increasing air-conditioning system |
| CN108870689A (en) * | 2018-07-17 | 2018-11-23 | 珠海格力电器股份有限公司 | Pressure control method and system of air conditioning unit, computer equipment and storage medium |
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| CN110285535A (en) * | 2019-06-24 | 2019-09-27 | 珠海格力电器股份有限公司 | Enthalpy increasing control method and device for air conditioning system |
| CN110285535B (en) * | 2019-06-24 | 2020-11-17 | 珠海格力电器股份有限公司 | Enthalpy increasing control method and device for air conditioning system |
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| CN111664523A (en) * | 2020-05-08 | 2020-09-15 | 海信（山东）空调有限公司 | Enhanced vapor injection system and control method |
| CN111664523B (en) * | 2020-05-08 | 2021-11-26 | 海信（山东）空调有限公司 | Enhanced vapor injection system and control method |
| CN111795476A (en) * | 2020-07-21 | 2020-10-20 | 广东Tcl智能暖通设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN111795476B (en) * | 2020-07-21 | 2021-08-24 | 广东Tcl智能暖通设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
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