CN113339963A - Compressor oil return control method and system and air conditioner - Google Patents
Compressor oil return control method and system and air conditioner Download PDFInfo
- Publication number
- CN113339963A CN113339963A CN202110517602.4A CN202110517602A CN113339963A CN 113339963 A CN113339963 A CN 113339963A CN 202110517602 A CN202110517602 A CN 202110517602A CN 113339963 A CN113339963 A CN 113339963A
- Authority
- CN
- China
- Prior art keywords
- compressor
- oil return
- expansion valve
- air conditioner
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
Abstract
The application provides a compressor oil return control method, a compressor oil return control system and an air conditioner, relates to the field of air conditioners, and solves the problem that the oil return amount of a compressor cannot be adjusted, wherein the method comprises the following steps: acquiring a plurality of current operating parameters of the air conditioner within a preset time period; obtaining correction coefficients respectively corresponding to a plurality of current operation parameters; multiplying a plurality of current operation parameters by corresponding correction coefficients respectively to obtain a plurality of product values; obtaining an opening degree adjusting value of the expansion valve according to the multiple product values; and adjusting the opening degree of an oil return electronic expansion valve of the air conditioner according to the opening degree adjusting value of the expansion valve. According to the method and the device, the opening adjusting value of the oil return electronic expansion valve is calculated according to the current operation parameters and the corresponding correction coefficients and the opening of the oil return electronic expansion valve is adjusted in real time according to the opening adjusting value of the oil return electronic expansion valve, the problem that the oil return amount of a compressor cannot be adjusted in the prior art is solved, and the phenomena of oil shortage and oil compression of the compressor are reduced.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a compressor oil return control method and system and an air conditioner.
Background
With the rapid development of the air conditioning industry, the air conditioning industry is upgraded for many times, and the requirement on reliability is higher and higher. For a multi-split air conditioner, the reliability of a compressor is an important component of the reliability of a whole system, and the oil return mode of the existing compressor mostly adopts a continuous fixed oil return mode of a capillary tube or a capillary tube and an electromagnetic valve, so that oil return is conducted or closed and cut off, and the oil return amount cannot be adjusted.
In fact, along with the operation frequency of the compressor, the system exhaust pressure, and the exhaust temperature, the oil discharge rate of the compressor is different, and in general, the higher the operation frequency of the compressor is, the larger the system exhaust pressure is, and the higher the exhaust temperature is, the higher the oil discharge rate of the compressor is increased, and the larger the oil return demand of the compressor is, in the existing technical scheme, the oil return amount of the compressor cannot be adjusted, which may cause the phenomena of oil shortage and oil compression of the compressor, and further affect the service life of the compressor.
Disclosure of Invention
The application provides a compressor oil return control method, a compressor oil return control system and an air conditioner, wherein the compressor oil return control method, the compressor oil return control system and the air conditioner can calculate an oil return electronic expansion valve opening degree adjusting value according to a plurality of current operation parameters and corresponding correction coefficients and a set calculation rule, and adjust the opening degree of an oil return electronic expansion valve in real time according to the oil return electronic expansion valve opening degree adjusting value.
In one aspect, the application provides a compressor oil return control method, including the following steps:
acquiring a plurality of current operating parameters of the air conditioner within a preset time period;
obtaining correction coefficients respectively corresponding to the current operation parameters;
multiplying the current operation parameters by corresponding correction coefficients respectively to obtain a plurality of product values;
obtaining an opening degree adjusting value of the expansion valve according to the multiple product values;
and adjusting the opening degree of an oil return electronic expansion valve of the air conditioner according to the opening degree adjustment value of the expansion valve.
In another embodiment of the present application, before the obtaining of the plurality of current operating parameters of the air conditioner within the preset time period, the method further includes:
when the air conditioner is started, acquiring an initial opening value of an oil return electronic expansion valve of the air conditioner;
the return oil electronic expansion valve operates at the initial opening value.
In another embodiment of the present application, when the air conditioner is started, the oil return electronic expansion valve operates at the initial opening value, including:
acquiring the initial opening operation time of the oil return electronic expansion valve;
comparing the initial opening operation time with a preset opening operation time threshold to obtain an operation time comparison result;
if the running time comparison result shows that the initial opening running time does not exceed the opening running time threshold, the oil return electronic expansion valve continues to run at the initial opening value, and the initial opening running time of the oil return electronic expansion valve continues to be obtained;
and if the running time comparison result shows that the initial opening running time exceeds the opening running time threshold, acquiring a plurality of current running parameters of the air conditioner.
In another embodiment of the present application, the current operation parameters include a current operation frequency value of a compressor, a current exhaust temperature value of the compressor, and a current operation pressure value of an external unit, and the obtaining a plurality of current operation parameters of the air conditioner within a preset time period includes:
and acquiring the current operation frequency value of the compressor of the air conditioner, the current exhaust temperature value of the compressor and the current operation pressure value of the external unit.
In another embodiment of the present application, the obtaining correction coefficients corresponding to the current operating parameters includes:
comparing the current running frequency value of the compressor with a preset frequency correction coefficient library to obtain a frequency correction coefficient comparison result;
and determining a frequency correction coefficient corresponding to the current running frequency value of the compressor according to the frequency correction coefficient comparison result.
In another embodiment of the present application, the obtaining correction coefficients corresponding to the current operating parameters includes:
comparing the current exhaust temperature value of the compressor with a preset temperature correction coefficient library to obtain a temperature correction coefficient comparison result;
and determining a temperature correction coefficient corresponding to the current exhaust temperature value of the compressor according to the temperature correction coefficient comparison result.
In another embodiment of the present application, the obtaining correction coefficients corresponding to the current operating parameters includes:
comparing the current operating pressure value of the external machine with a preset pressure correction coefficient library to obtain a pressure correction coefficient comparison result;
and determining a pressure correction coefficient corresponding to the current operating pressure value of the external unit according to the pressure correction coefficient comparison result.
In another embodiment of the present application, the obtaining a plurality of current operating parameters of the air conditioner within a preset time period includes:
acquiring the time period;
and acquiring a plurality of current operation parameters of the air conditioner at least once in the time period.
In another embodiment of the present application, after adjusting an opening degree of an oil return electronic expansion valve of the air conditioner according to the expansion valve opening degree adjustment value, the method further includes:
acquiring a shutdown signal and/or a compressor shutdown signal;
acquiring the opening zero setting information of the expansion valve according to the shutdown signal and/or the compressor shutdown signal;
and controlling the opening degree of the oil return electronic expansion valve to be zero according to the opening degree zero setting information of the expansion valve.
In another embodiment of the present application, the acquiring the shutdown signal and/or the compressor shutdown signal includes:
receiving the shutdown instruction and/or the compressor shutdown instruction;
and generating a shutdown signal according to the shutdown instruction, or generating a compressor shutdown signal according to the compressor shutdown instruction.
In another aspect, the present application provides a compressor oil return control system, the system comprising:
the operation parameter acquisition module is used for acquiring a plurality of current operation parameters of the air conditioner within a preset time period;
a correction coefficient acquisition module for acquiring correction coefficients corresponding to the plurality of current operating parameters, respectively;
a product module for multiplying the plurality of current operating parameters by the corresponding correction coefficients respectively to obtain a plurality of product values;
the opening adjustment value acquisition module is used for acquiring an opening adjustment value of the expansion valve according to the multiple product values;
and the expansion valve adjusting module adjusts the opening of an oil return electronic expansion valve of the air conditioner according to the opening adjusting value of the expansion valve.
The system further comprises:
the initial opening value acquisition module is used for acquiring an initial opening value of an oil return electronic expansion valve of the air conditioner when the air conditioner is started;
and the oil return electronic expansion valve operates at the initial opening value.
The initial operation module specifically comprises:
the electronic expansion valve is used for acquiring the initial opening operation time of the oil return electronic expansion valve;
the initial opening operation time is compared with a preset opening operation time threshold value to obtain an operation time comparison result;
if the running time comparison result shows that the initial opening running time does not exceed the opening running time threshold, the oil return electronic expansion valve continues to run at the initial opening value, and the initial opening running time of the oil return electronic expansion valve continues to be obtained;
and if the running time comparison result shows that the initial opening running time exceeds the opening running time threshold, acquiring a plurality of current running parameters of the air conditioner.
The current operation parameters comprise a current operation frequency value of the compressor, a current exhaust temperature value of the compressor and a current operation pressure value of the external unit, and the operation parameter acquisition module is specifically configured to:
and acquiring the current operation frequency value of the compressor of the air conditioner, the current exhaust temperature value of the compressor and the current operation pressure value of the external unit.
The correction coefficient acquisition module includes:
the frequency correction coefficient comparison module is used for comparing the current running frequency value of the compressor with a preset frequency correction coefficient library to obtain a frequency correction coefficient comparison result;
and the frequency correction coefficient comparison module is used for determining a frequency correction coefficient corresponding to the current running frequency value of the compressor according to the frequency correction coefficient comparison result.
The correction coefficient acquisition module includes:
the temperature correction coefficient comparison module is used for comparing the current exhaust temperature value of the compressor with a preset temperature correction coefficient library to obtain a temperature correction coefficient comparison result;
and the temperature correction coefficient comparison module is used for determining a temperature correction coefficient corresponding to the current exhaust temperature value of the compressor according to the temperature correction coefficient comparison result.
The correction coefficient acquisition module includes:
the pressure correction coefficient comparison module is used for comparing the current operating pressure value of the external machine with a preset pressure correction coefficient library to obtain a pressure correction coefficient comparison result;
and the pressure correction coefficient comparison module is used for determining a pressure correction coefficient corresponding to the current operating pressure value of the external machine according to the pressure correction coefficient comparison result.
The operating parameter acquiring module comprises:
acquiring the time period;
and acquiring a plurality of current operation parameters of the air conditioner at least once in the time period.
The system further comprises:
the shutdown signal acquisition module is used for acquiring a shutdown signal and/or a compressor shutdown signal;
the zero setting information acquisition module is used for acquiring the opening zero setting information of the expansion valve according to the shutdown signal and/or the compressor shutdown signal;
and the opening zero value setting module is used for controlling the opening of the oil return electronic expansion valve to be a zero value according to the opening zero setting information of the expansion valve.
The shutdown signal acquisition module is specifically configured to:
the system is used for receiving the shutdown instruction and/or the compressor shutdown instruction;
and the control unit is used for generating a shutdown signal according to the shutdown instruction or generating a compressor shutdown signal according to the compressor shutdown instruction.
On the other hand, this application still provides an air conditioner, the air conditioner includes compressor, overhead temperature sensor, high pressure sensor, oil return electronic expansion valve, what the air conditioner adopted is compressor oil return control method or compressor oil return control system.
According to the method and the device, the current operation parameters of the air conditioner are detected in real time, the correction coefficients corresponding to the current operation parameters are obtained, the opening adjustment value of the oil return electronic expansion valve is calculated according to the set calculation rule, and the opening of the oil return electronic expansion valve is adjusted in real time according to the opening adjustment value of the oil return electronic expansion valve, so that the problem that the oil return amount of the compressor cannot be adjusted in the prior art is solved, the phenomena of oil shortage and oil compression of the compressor are reduced, and the overall reliability of the air conditioner is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 6 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 7 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 8 is a schematic flow chart diagram illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 9 is a schematic flow chart illustrating an embodiment of a method for controlling oil return to a compressor according to an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of an embodiment of a compressor oil return control system in an embodiment of the present application;
fig. 11 is a schematic structural diagram of an embodiment of an air conditioner in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiments of the present application provide a compressor oil return control method, a system and an air conditioner, which are described in detail below.
As shown in fig. 1 and fig. 2, which are schematic flow charts of an embodiment of a method for controlling oil return of a compressor in an embodiment of the present application, the method for controlling oil return of a compressor includes the following steps 101 to 105:
step 101, acquiring a plurality of current operating parameters of the air conditioner within a preset time period.
After the air conditioner operates for a period of time, the operating state of the air conditioner is determined by obtaining a plurality of current operating parameters of the air conditioner, so that the oil return electronic expansion valve is controlled to be opened at a proper opening degree according to the current operating state of the air conditioner, and the oil return amount of the compressor is adjusted in real time. The current operation parameters comprise a current operation frequency value of the compressor, a current exhaust temperature value of the compressor and a current operation pressure value of the external unit, and also can comprise other operation parameters capable of reflecting an oil shortage state of the compressor of the air conditioning unit or equipment.
Within a preset time period, acquiring a plurality of current operating parameters of the air conditioner, including:
acquiring a current operation frequency value of a compressor of the air conditioner, a current exhaust temperature value of the compressor and a current operation pressure value of an external unit;
wherein, the current operating frequency value of the compressor, the current exhaust temperature value of the compressor and the current operating pressure value of the external unit during the operation of the air conditioner are obtained by hardware or software, for example: the current operation frequency of the compressor is monitored in real time through a system controller of the air conditioner, the current operation frequency value of the compressor is obtained, the current exhaust temperature value of the compressor is detected in real time through a capping temperature sensor of the air conditioner, and the current operation pressure value of an outer machine is detected in real time through a high-pressure sensor.
According to the expansion valve opening adjustment value, adjust the opening of the oil return electronic expansion valve of air conditioner, still include:
acquiring a time period;
and acquiring a plurality of current operation parameters of the air conditioner at least once in a time period.
The oil return electronic expansion valve needs to be adjusted in real time according to the current operation parameters of the air conditioner, so that the current operation parameters of the air conditioner need to be periodically acquired, and adjustment is periodically performed according to the opening value of the oil return electronic expansion valve, the time period is the time starting time and the interval time for judging that a plurality of current operation parameters of the air conditioner need to be acquired, the time period can be manually set by a user according to the operation state of the air conditioner, the time period is set by sending a time period instruction to a system controller of the air conditioner, and the preset time period can also be preset by default in the system controller of the air conditioner.
And 102, obtaining correction coefficients respectively corresponding to a plurality of current operation parameters.
When the compressor runs, the oil return amount of the compressor is in one-to-one correspondence with the current running frequency of the compressor, the current exhaust temperature value of the compressor and the current running pressure value of an external unit, so that in the running process of the compressor, when the oil return amount of the compressor is deviated, the oil return amount of the compressor needs to be regulated according to the matching relation between the oil return amount of the compressor and the current running parameters of the air conditioner, namely, the opening degree of an oil return electronic expansion valve is regulated, and the correction coefficient is an inverse proportional relation coefficient between the opening degree of the oil return electronic expansion valve of the compressor and the current running parameters of the air conditioner, namely, the current running parameters of the air conditioner are multiplied by the corresponding correction coefficient, so that the corresponding oil return electronic opening value of the compressor can be obtained.
Obtaining correction coefficients corresponding to a plurality of current operating parameters, respectively, including:
and comparing the obtained current operating frequency value of the compressor, the current exhaust temperature value of the compressor and the current operating pressure value of the external unit with a correction coefficient library preset in a system controller of the air conditioner to obtain a correction coefficient corresponding to the current operating frequency value of the compressor, the current exhaust temperature value of the compressor and the current operating pressure value of the external unit.
And 103, multiplying the plurality of current operation parameters by the corresponding correction coefficients respectively to obtain a plurality of product values.
And multiplying the obtained current compressor operation frequency value, the current compressor exhaust temperature value and the current external machine operation pressure value by the obtained corresponding correction coefficient to obtain a plurality of product values. For example, if the current operating frequency value of the compressor is F, the obtained correction coefficient corresponding to the current operating frequency value F of the compressor is α, the corresponding product is F × α, the current exhaust temperature value of the compressor is Tp, the obtained correction coefficient corresponding to the current exhaust temperature value Tp of the compressor is λ, the corresponding product is Tp × λ, the current operating pressure value of the external machine is P, the obtained correction coefficient corresponding to the current operating pressure value P of the external machine is β, the corresponding product is P β, and the adjustment may be performed according to actual conditions.
And 104, obtaining an opening degree adjusting value of the expansion valve according to the multiple product values.
Obtaining an expansion valve opening degree adjusting value according to a plurality of product values, comprising:
and summing the multiple product values to obtain an expansion valve opening degree adjusting value. For example, when the obtained multiple products are F × α, Tp × λ, and P × β, respectively, the obtained expansion valve opening adjustment value is F × α + P × β + Tp × λ, and then the calculated value of F × α + P × β + Tp × λ is the opening value of the oil return electronic expansion valve. The expansion valve opening degree adjustment value may be any other expansion formula based on F × α + P × β + Tp × λ, and may be adjusted according to actual conditions.
And 105, adjusting the opening degree of the oil return electronic expansion valve of the air conditioner according to the opening degree adjusting value of the expansion valve.
And after the system controller of the air conditioner acquires the opening adjustment value of the expansion valve, the system controller controls the oil return electronic expansion valve to increase or decrease the opening according to the opening adjustment value of the expansion valve so as to achieve the set opening adjustment value of the expansion valve.
According to the method and the device, the current operation parameters of the air conditioner are detected in real time, the correction coefficients corresponding to the current operation parameters are obtained, the opening adjustment value of the oil return electronic expansion valve is calculated according to the set calculation rule, and the opening of the oil return electronic expansion valve is adjusted in real time according to the opening adjustment value of the oil return electronic expansion valve, so that the problem that the oil return amount of the compressor cannot be adjusted in the prior art is solved, the phenomena of oil shortage and oil compression of the compressor are reduced, and the overall reliability of the air conditioner is improved.
In another embodiment of the present application, before acquiring a plurality of current operating parameters of the air conditioner within a preset time period, as shown in fig. 3, the method further includes steps 201 to 202:
As shown in fig. 2, when the air conditioner is started, the compressor is ready to be started, and the system controller of the air conditioner generates an initial opening value, where the initial opening value may be obtained by detecting a current indoor and outdoor ambient temperature and automatically analyzing the current indoor and outdoor ambient temperature when the air conditioner is started, the initial opening value may be a default value preset in the system controller of the air conditioner, or may be set by a user manually sending an initial opening value signal to the system controller through an external signal sending terminal when the air conditioner is started.
The initial opening value of the oil return electronic expansion valve refers to the size of the preset value of the electronic expansion valve at the moment when the air conditioner is just started, and after the obtained initial opening value, the system controller controls the oil return electronic expansion valve of the compressor to operate at the set initial opening value.
In another embodiment of the present application, when the air conditioner is started, the oil return electronic expansion valve operates at an initial opening value, as shown in fig. 4, including the following steps 301 to 302:
and 301, acquiring the initial opening operation time of the oil return electronic expansion valve.
When the air conditioner is started, the system controller generates an initial opening value and simultaneously generates initial opening operation time of a corresponding oil return electronic expansion valve, wherein the initial opening operation time can be obtained by detecting the current indoor and outdoor environment temperature and automatically analyzing the current indoor and outdoor environment temperature when the air conditioner is started, the initial opening operation time can also be a default value preset in the system controller of the air conditioner, or can be set by manually sending an initial opening operation time signal to the system controller through an external signal sending terminal by a user when the air conditioner is started.
And 302, comparing the initial opening operation time with a preset opening operation time threshold value to obtain an operation time comparison result.
After the oil return electronic expansion valve of the compressor operates at the initial opening value for the initial opening operation time, the opening adjustment of the oil return electronic expansion valve of the compressor needs to be started according to the current operation parameters of the air conditioner, so that the phenomena of oil shortage or oil compression of the compressor due to overlong operation of the oil return electronic expansion valve are avoided. Therefore, the initial opening operation time is compared with a preset opening operation time threshold value, and whether the operation time of the oil return electronic expansion valve at the initial opening value exceeds the preset opening operation time threshold value is judged, wherein the preset opening operation time threshold value may be a default value preset in a system controller of the air conditioner, or may be set by a user manually sending an opening operation time threshold value signal to the system controller through an external signal sending terminal when the air conditioner is started.
And after the initial opening operation time is compared with a preset opening operation time threshold, obtaining an operation time comparison result, wherein the operation time comparison result comprises that the initial opening operation time does not exceed the opening operation time threshold and the initial opening operation time exceeds the opening operation time threshold.
As shown in fig. 2, if the operation time comparison result indicates that the initial opening operation time does not exceed the opening operation time threshold, the oil return electronic expansion valve continues to operate at the initial opening value, continues to obtain the initial opening operation time of the oil return electronic expansion valve, and continues to compare the initial opening operation time with the preset opening operation time threshold after operating for a period of time;
and if the operation time comparison result shows that the initial opening operation time exceeds the opening operation time threshold value, the time length of the initial opening operation time of the oil return electronic expansion valve is indicated, and the adjustment is required to be carried out according to the current operation parameters of the air conditioner, and the air conditioner system controller starts to acquire a plurality of current operation parameters of the air conditioner.
In another embodiment of the present application, obtaining correction coefficients corresponding to a plurality of current operating parameters, as shown in fig. 5, includes the following steps 401 to 402:
After the system controller of the air conditioner obtains the current operation frequency value of the compressor, the current operation frequency value of the compressor is compared with a preset frequency correction coefficient library, and the obtained current operation frequency value of the compressor corresponds to the frequency correction coefficient in the frequency correction coefficient library. The preset frequency correction coefficient library may be a default value preset in a system controller of the air conditioner, or may be set by a user according to an actual operation condition of the air conditioner.
TABLE 1 frequency correction coefficient Table
| Current operating frequency value F of compressor | Frequency correction factor alpha |
| F≥90Hz | 4 |
| 60Hz≤F<90Hz | 3.5 |
| F<60Hz | 3 |
For example, the current operating frequency value of the compressor is set to F, the frequency correction coefficient corresponding to the current operating frequency value of the compressor is set to α, and the frequency correction coefficient bank may be a frequency correction coefficient table as shown in table 1.
And step 402, determining a frequency correction coefficient corresponding to the current running frequency value of the compressor according to the frequency correction coefficient comparison result.
And the system controller of the air conditioner acquires the frequency correction coefficient comparison result, and analyzes the frequency correction coefficient comparison result to obtain a corresponding frequency correction coefficient. For example, when the obtained current compressor operating frequency value F is 70Hz, the obtained frequency correction coefficient comparison result indicates that the current compressor operating frequency value F is in a range of "60 Hz ≦ F <90Hz," and the corresponding frequency correction coefficient is α ═ 3.5.
In another embodiment of the present application, obtaining correction coefficients corresponding to a plurality of current operating parameters, as shown in fig. 6, includes the following steps 501 to 502:
TABLE 2 temperature correction coefficient Table
| Current exhaust temperature value Tp | Temperature correction coefficient lambda |
| Tp≥90℃ | 0.25 |
| 75℃≤Tp<90℃ | 0.2 |
| Tp<75℃ | 0.15 |
For example, the current discharge temperature value of the compressor is set to Tp, the temperature correction coefficient corresponding to the current discharge temperature value of the compressor is set to λ, and the temperature correction coefficient bank may be a temperature correction coefficient table as shown in table 2.
And 502, determining a temperature correction coefficient corresponding to the current exhaust temperature value of the compressor according to the comparison result of the temperature correction coefficients.
And the system controller of the air conditioner acquires the comparison result of the temperature correction coefficients, and analyzes the comparison result of the temperature correction coefficients to obtain the corresponding temperature correction coefficients. For example, when the obtained current discharge temperature value of the compressor is Tp-80 ℃, the obtained comparison result of the temperature correction coefficients is that the current discharge temperature value of the compressor is Tp within a range of "75 ≦ Tp <90 ℃", and the corresponding temperature correction coefficient is λ -0.2.
In another embodiment of the present application, obtaining correction coefficients corresponding to a plurality of current operating parameters, as shown in fig. 7, includes the following steps 601-602:
After acquiring the current operating pressure value of the external unit, the system controller of the air conditioner compares the current operating pressure value of the external unit with a preset pressure correction coefficient library, and the acquired current operating pressure value of the external unit corresponds to the pressure correction coefficient in the pressure correction coefficient library. The preset pressure correction coefficient library may be a default value preset in a system controller of the air conditioner, or may be set by a user according to an actual operation condition of the air conditioner.
TABLE 3 pressure correction coefficient table
| Current operating pressure value P | Pressure correction factor beta |
| P≥3.3MPa | 30 |
| 2.8MPa≤P<3.3MPa | 28 |
| P<2.7MPa | 26 |
For example, the current operating pressure value of the external unit is set to P, the pressure correction coefficient corresponding to the current operating pressure value P of the external unit is set to β, and the pressure correction coefficient bank may be a pressure correction coefficient table as shown in table 3.
And step 602, determining a pressure correction coefficient corresponding to the current operating pressure value of the external machine according to the pressure correction coefficient comparison result.
And the system controller of the air conditioner acquires the comparison result of the pressure correction coefficients, and analyzes the comparison result of the pressure correction coefficients to acquire corresponding pressure correction coefficients. For example, when the obtained current operating pressure value P of the external machine is 3MPa, the obtained pressure correction coefficient comparison result indicates that P of the current operating pressure value of the external machine is in a range of "2.8 MPa ≦ P <3.3 MPa", and the corresponding pressure correction coefficient is β ═ 28.
Therefore, in step 104, the expansion valve opening degree adjustment value is obtained according to the multiple product values, which may specifically be:
when the current operating frequency value F of the compressor is 70Hz, the frequency correction coefficient is α is 3.5, and the corresponding product is F α is 70 α 3.5 — 245; when the current exhaust temperature value of the compressor is Tp-80 ℃, the temperature correction coefficient is lambda-0.2, and the corresponding product is Tp-lambda-80-0.2-16; when the obtained current operating pressure value P of the external unit is 3MPa, the pressure correction coefficient is beta 28; the above-mentioned products are summed up to obtain a sum F × α + P × β + Tp × λ ═ 245+16+28 ═ 289, and the unit of the expansion valve opening degree adjustment value is Pls, that is, the expansion valve opening degree adjustment value obtained by analysis is Pls.
In another embodiment of the present application, after adjusting the opening degree of the oil return electronic expansion valve of the air conditioner according to the expansion valve opening degree adjustment value, as shown in fig. 8, the method further includes the following steps 701 to 702:
As shown in fig. 2, in the operation process of the air conditioner, the system controller of the air conditioner detects the operation state of the air conditioner in real time, and receives a shutdown signal and/or a compressor shutdown signal in real time.
And step 702, acquiring the opening zero setting information of the expansion valve according to the shutdown signal and/or the compressor shutdown signal.
When a shutdown signal or a compressor shutdown signal is received, the current compressor stops running, an oil return electronic expansion valve of the compressor needs to be controlled to be closed at the same time, oil return of the compressor needs to be stopped, and opening degree zero setting information of the expansion valve is acquired.
And step 702, controlling the opening degree of the oil return electronic expansion valve to be zero according to the opening degree zero setting information of the expansion valve.
After the information of setting the opening of the expansion valve to zero is obtained, the system controller of the air conditioner controls the opening of the oil return electronic expansion valve to be zero, namely controls the opening of the oil return electronic expansion valve to be 0pls until the air conditioner and the compressor are started again.
In another embodiment of the present application, obtaining a shutdown signal and/or a compressor shutdown signal, as shown in FIG. 9, includes the following steps 801-802:
The air conditioner is internally provided with a signal receiving module, a user can send a shutdown instruction or a compressor shutdown instruction to the air conditioner through an external signal sending terminal in the running process of the air conditioner, and the signal receiving module of the air conditioner acquires the shutdown instruction or the compressor shutdown instruction.
And step 802, generating a shutdown signal according to the shutdown instruction, or generating a compressor shutdown signal according to the compressor shutdown instruction.
After the shutdown instruction or the compressor shutdown instruction is obtained, the system controller of the air conditioner obtains a corresponding shutdown signal or compressor shutdown signal according to the shutdown instruction or the compressor shutdown instruction, and controls the air conditioner to shut down or the compressor to shut down according to the shutdown signal or the compressor shutdown signal, so that the operation parameters of the air conditioner are manually regulated and controlled by a user.
In order to better implement the oil return control method of the compressor in the embodiment of the present application, on the basis of the oil return control method of the compressor, an oil return control system of the compressor is further provided in the embodiment of the present application, as shown in fig. 10, the oil return control system 900 of the compressor includes:
an operation parameter obtaining module 901, configured to obtain a plurality of current operation parameters of the air conditioner within a preset time period;
a correction coefficient obtaining module 902, configured to obtain correction coefficients corresponding to a plurality of current operating parameters, respectively;
a product module 903, configured to multiply the current operating parameters by corresponding correction coefficients, respectively, to obtain a plurality of product values;
an opening adjustment value obtaining module 904, configured to obtain an opening adjustment value of the expansion valve according to the multiple product values;
and the expansion valve adjusting module 905 adjusts the opening degree of an oil return electronic expansion valve of the air conditioner according to the opening degree adjusting value of the expansion valve.
The system 900 further includes:
the initial opening value acquisition module is used for acquiring the initial opening value of an oil return electronic expansion valve of the air conditioner when the air conditioner is started;
and the initial operation module is used for operating the oil return electronic expansion valve at an initial opening value.
The initial operation module specifically comprises:
the device is used for acquiring the initial opening operation time of the oil return electronic expansion valve;
the device is used for comparing the initial opening operation time with a preset opening operation time threshold value to obtain an operation time comparison result;
if the operation time comparison result shows that the initial opening operation time does not exceed the opening operation time threshold, the oil return electronic expansion valve continues to operate at the initial opening value, and the initial opening operation time of the oil return electronic expansion valve continues to be obtained;
and if the operation time comparison result shows that the initial opening operation time exceeds the opening operation time threshold, acquiring a plurality of current operation parameters of the air conditioner.
The current operation parameters include a current operation frequency value of the compressor, a current exhaust temperature value of the compressor, and a current operation pressure value of the external unit, and the operation parameter obtaining module 901 is specifically configured to:
and acquiring the current operation frequency value of the compressor of the air conditioner, the current exhaust temperature value of the compressor and the current operation pressure value of the external unit.
The correction coefficient acquisition module 902 includes:
the frequency correction coefficient comparison module is used for comparing the current running frequency value of the compressor with a preset frequency correction coefficient library to obtain a frequency correction coefficient comparison result;
and the frequency correction coefficient comparison module is used for determining a frequency correction coefficient corresponding to the current running frequency value of the compressor according to the frequency correction coefficient comparison result.
The correction coefficient acquisition module 902 includes:
the temperature correction coefficient comparison module is used for comparing the current exhaust temperature value of the compressor with a preset temperature correction coefficient library to obtain a temperature correction coefficient comparison result;
and the temperature correction coefficient comparison module is used for determining a temperature correction coefficient corresponding to the current exhaust temperature value of the compressor according to the temperature correction coefficient comparison result.
The correction coefficient acquisition module 902 includes:
the pressure correction coefficient comparison module is used for comparing the current operating pressure value of the external machine with a preset pressure correction coefficient library to obtain a pressure correction coefficient comparison result;
and the pressure correction coefficient comparison module is used for determining a pressure correction coefficient corresponding to the current operating pressure value of the external machine according to the pressure correction coefficient comparison result.
The operation parameter acquiring module 901 includes:
acquiring a time period;
a plurality of current operating parameters of the air conditioner are acquired at least once during a time period.
The system 900 further includes:
the shutdown signal acquisition module is used for acquiring a shutdown signal and/or a compressor shutdown signal;
the zero setting information acquisition module is used for acquiring the opening zero setting information of the expansion valve according to the shutdown signal and/or the compressor shutdown signal;
and the opening zero value setting module is used for controlling the opening of the oil return electronic expansion valve to be a zero value according to the opening zero setting information of the expansion valve.
The shutdown signal acquisition module is specifically configured to:
the system is used for receiving a shutdown instruction and/or a compressor shutdown instruction;
and the controller is used for generating a shutdown signal according to the shutdown instruction or generating a compressor shutdown signal according to the compressor shutdown instruction.
In another embodiment of the present application, the present application further provides an air conditioner, where the air conditioner employs a compressor oil return control method or a compressor oil return control system, as shown in fig. 11, the air conditioner includes a compressor 1001, a top pressure temperature sensor 1002, a high pressure sensor 1003, an oil return electronic expansion valve 1004, and further includes an oil separator 1005, a four-way valve 1006, an outdoor heat exchanger 1007, an outdoor ambient temperature sensor 1008, an outdoor fan 1009, an outdoor unit throttling device 1010, an indoor unit 1011, an indoor unit throttling device 1012, a high-low pressure stop valve 1013, a gas-liquid separator 1014, and a low pressure sensor 1015.
The compressor 1001 is a device for lifting low-pressure gas into high-pressure gas in an air conditioner, the oil return electronic expansion valve 1004 is arranged between the oil separator 1005 and a compressor return pipe and used for controlling the oil return amount of the compressor 1001, the top pressure temperature sensor 1002 is arranged at the top of a shell of the compressor 1001 and used for detecting the exhaust temperature of the compressor 1001 in real time, and the high-pressure sensor 1003 is arranged between the oil separator 1005 and the four-way valve 1006 and used for detecting the system operation pressure in real time.
The system controller 1016 is electrically connected with the system controller 1016, the capping temperature sensor 1002, the high pressure sensor 1003 and the oil return electronic expansion valve 1004, the system controller 1016 is a control center of the air conditioner, various interfaces and lines are used for connecting various parts of the whole electronic equipment, and various functions and processing data of the air conditioner are executed by running or executing software programs and/or modules stored in a memory and calling data stored in the memory, so that the electronic equipment is integrally monitored. Optionally, system controller 1016 may include one or more processing cores; the system controller 1016 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like and preferably the system controller 906 may integrate an application processor, which handles primarily the operating system, user interfaces, application programs, etc., and a modem processor, which handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into the system controller 1016.
The compressor oil return control method, the compressor oil return control system and the air conditioner provided by the embodiment of the application are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. The oil return control method of the compressor is characterized by comprising the following steps of:
acquiring a plurality of current operating parameters of the air conditioner within a preset time period;
obtaining correction coefficients respectively corresponding to the current operation parameters;
multiplying the current operation parameters by corresponding correction coefficients respectively to obtain a plurality of product values;
obtaining an opening degree adjusting value of the expansion valve according to the multiple product values;
and adjusting the opening degree of an oil return electronic expansion valve of the air conditioner according to the opening degree adjustment value of the expansion valve.
2. The compressor oil return control method according to claim 1, wherein before acquiring a plurality of current operating parameters of the air conditioner within the preset time period, the method further comprises:
when the air conditioner is started, acquiring an initial opening value of an oil return electronic expansion valve of the air conditioner;
the return oil electronic expansion valve operates at the initial opening value.
3. The compressor oil return control method of claim 2, wherein the oil return electronic expansion valve operating at the initial opening value at the start of the air conditioner comprises:
acquiring the initial opening operation time of the oil return electronic expansion valve;
comparing the initial opening operation time with a preset opening operation time threshold to obtain an operation time comparison result;
if the running time comparison result shows that the initial opening running time does not exceed the opening running time threshold, the oil return electronic expansion valve continues to run at the initial opening value, and the initial opening running time of the oil return electronic expansion valve continues to be obtained;
and if the running time comparison result shows that the initial opening running time exceeds the opening running time threshold, acquiring a plurality of current running parameters of the air conditioner.
4. The method as claimed in claim 1, wherein the current operation parameters include a current operation frequency value of a compressor, a current exhaust temperature value of the compressor, and a current operation pressure value of an external unit, and the obtaining a plurality of current operation parameters of the air conditioner within a preset time period includes:
and acquiring the current operation frequency value of the compressor of the air conditioner, the current exhaust temperature value of the compressor and the current operation pressure value of the external unit.
5. The method as claimed in claim 4, wherein said obtaining correction factors corresponding to said plurality of current operating parameters respectively comprises:
comparing the current running frequency value of the compressor with a preset frequency correction coefficient library to obtain a frequency correction coefficient comparison result;
and determining a frequency correction coefficient corresponding to the current running frequency value of the compressor according to the frequency correction coefficient comparison result.
6. The method as claimed in claim 4, wherein said obtaining correction factors corresponding to said plurality of current operating parameters respectively comprises:
comparing the current exhaust temperature value of the compressor with a preset temperature correction coefficient library to obtain a temperature correction coefficient comparison result;
and determining a temperature correction coefficient corresponding to the current exhaust temperature value of the compressor according to the temperature correction coefficient comparison result.
7. The method as claimed in claim 4, wherein said obtaining correction factors corresponding to said plurality of current operating parameters respectively comprises:
comparing the current operating pressure value of the external machine with a preset pressure correction coefficient library to obtain a pressure correction coefficient comparison result;
and determining a pressure correction coefficient corresponding to the current operating pressure value of the external unit according to the pressure correction coefficient comparison result.
8. The compressor oil return control method according to claim 1, wherein the obtaining a plurality of current operating parameters of the air conditioner within a preset time period comprises:
acquiring the time period;
and acquiring a plurality of current operation parameters of the air conditioner at least once in the time period.
9. The compressor oil return control method of claim 1, wherein after adjusting an opening degree of an oil return electronic expansion valve of the air conditioner according to the expansion valve opening degree adjustment value, the method further comprises:
acquiring a shutdown signal and/or a compressor shutdown signal;
acquiring the opening zero setting information of the expansion valve according to the shutdown signal and/or the compressor shutdown signal;
and controlling the opening degree of the oil return electronic expansion valve to be zero according to the opening degree zero setting information of the expansion valve.
10. The compressor oil return control method according to claim 9, wherein the obtaining of the shutdown signal and/or the compressor shutdown signal includes:
receiving a shutdown instruction and/or a compressor shutdown instruction;
and generating a shutdown signal according to the shutdown instruction, or generating a compressor shutdown signal according to the compressor shutdown instruction.
11. A compressor oil return control system, the system comprising:
the operation parameter acquisition module is used for acquiring a plurality of current operation parameters of the air conditioner within a preset time period;
a correction coefficient acquisition module for acquiring correction coefficients corresponding to the plurality of current operating parameters, respectively;
a product module for multiplying the plurality of current operating parameters by the corresponding correction coefficients respectively to obtain a plurality of product values;
the opening adjustment value acquisition module is used for acquiring an opening adjustment value of the expansion valve according to the multiple product values;
and the expansion valve adjusting module adjusts the opening of an oil return electronic expansion valve of the air conditioner according to the opening adjusting value of the expansion valve.
12. An air conditioner, characterized in that, the air conditioner includes a compressor, a top-pressing temperature sensor, a high-pressure sensor, an oil return electronic expansion valve, the air conditioner adopts the compressor oil return control method according to the claims 1-10 or the compressor oil return control system according to the claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517602.4A CN113339963B (en) | 2021-05-12 | 2021-05-12 | Compressor oil return control method and system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517602.4A CN113339963B (en) | 2021-05-12 | 2021-05-12 | Compressor oil return control method and system and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113339963A true CN113339963A (en) | 2021-09-03 |
| CN113339963B CN113339963B (en) | 2022-09-02 |
Family
ID=77469285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110517602.4A Active CN113339963B (en) | 2021-05-12 | 2021-05-12 | Compressor oil return control method and system and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113339963B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864993A (en) * | 2021-11-04 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | Control method of auxiliary oil return device of multi-split air conditioning system |
| CN114135973A (en) * | 2021-11-15 | 2022-03-04 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009228972A (en) * | 2008-03-21 | 2009-10-08 | Daikin Ind Ltd | Refrigerating device |
| JP2010048460A (en) * | 2008-08-21 | 2010-03-04 | Samsung Electronics Co Ltd | Refrigerating cycle device with oil equalizing function to a plurality of compressors |
| JP2011117626A (en) * | 2009-12-01 | 2011-06-16 | Hitachi Appliances Inc | Air conditioner |
| CN103946646A (en) * | 2011-11-18 | 2014-07-23 | 三洋电机株式会社 | Refrigeration unit |
| JP2014190545A (en) * | 2013-03-26 | 2014-10-06 | Hitachi Appliances Inc | Freezer |
| CN104279804A (en) * | 2013-07-05 | 2015-01-14 | 珠海格力电器股份有限公司 | Gas and liquid separator, air conditioner and air conditioner liquid return control method |
| CN104457031A (en) * | 2014-09-30 | 2015-03-25 | 广东志高暖通设备股份有限公司 | Multi-split air conditioning system and oil balancing devices and control method of multi-split air conditioning system |
| CN104764167A (en) * | 2015-04-21 | 2015-07-08 | 珠海格力电器股份有限公司 | Oil return control method of variable frequency air conditioner compressor |
| JP2018200145A (en) * | 2017-05-29 | 2018-12-20 | 三菱重工サーマルシステムズ株式会社 | Control device, air conditioner, and control method |
| CN109612160A (en) * | 2018-12-11 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of method for controlling oil return, device and air conditioner |
| CN110595110A (en) * | 2019-09-30 | 2019-12-20 | Tcl空调器(中山)有限公司 | Air conditioner oil return control method and system, storage medium and air conditioner |
| CN111322673A (en) * | 2018-12-14 | 2020-06-23 | 广东Tcl智能暖通设备有限公司 | Oil pump and control method thereof |
| CN111426040A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN111426039A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN112303957A (en) * | 2020-10-15 | 2021-02-02 | 珠海格力电器股份有限公司 | Oil return control method for compressor |
-
2021
- 2021-05-12 CN CN202110517602.4A patent/CN113339963B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009228972A (en) * | 2008-03-21 | 2009-10-08 | Daikin Ind Ltd | Refrigerating device |
| JP2010048460A (en) * | 2008-08-21 | 2010-03-04 | Samsung Electronics Co Ltd | Refrigerating cycle device with oil equalizing function to a plurality of compressors |
| JP2011117626A (en) * | 2009-12-01 | 2011-06-16 | Hitachi Appliances Inc | Air conditioner |
| CN103946646A (en) * | 2011-11-18 | 2014-07-23 | 三洋电机株式会社 | Refrigeration unit |
| JP2014190545A (en) * | 2013-03-26 | 2014-10-06 | Hitachi Appliances Inc | Freezer |
| CN104279804A (en) * | 2013-07-05 | 2015-01-14 | 珠海格力电器股份有限公司 | Gas and liquid separator, air conditioner and air conditioner liquid return control method |
| CN104457031A (en) * | 2014-09-30 | 2015-03-25 | 广东志高暖通设备股份有限公司 | Multi-split air conditioning system and oil balancing devices and control method of multi-split air conditioning system |
| CN104764167A (en) * | 2015-04-21 | 2015-07-08 | 珠海格力电器股份有限公司 | Oil return control method of variable frequency air conditioner compressor |
| JP2018200145A (en) * | 2017-05-29 | 2018-12-20 | 三菱重工サーマルシステムズ株式会社 | Control device, air conditioner, and control method |
| CN109612160A (en) * | 2018-12-11 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of method for controlling oil return, device and air conditioner |
| CN111322673A (en) * | 2018-12-14 | 2020-06-23 | 广东Tcl智能暖通设备有限公司 | Oil pump and control method thereof |
| CN110595110A (en) * | 2019-09-30 | 2019-12-20 | Tcl空调器(中山)有限公司 | Air conditioner oil return control method and system, storage medium and air conditioner |
| CN111426040A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN111426039A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN112303957A (en) * | 2020-10-15 | 2021-02-02 | 珠海格力电器股份有限公司 | Oil return control method for compressor |
Non-Patent Citations (1)
| Title |
|---|
| 张蕾: "家用空调系统回油特性分析", 《制冷技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864993A (en) * | 2021-11-04 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | Control method of auxiliary oil return device of multi-split air conditioning system |
| CN114135973A (en) * | 2021-11-15 | 2022-03-04 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
| CN114135973B (en) * | 2021-11-15 | 2023-02-03 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113339963B (en) | 2022-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113339963B (en) | Compressor oil return control method and system and air conditioner | |
| CN113324325B (en) | Accurate temperature control method and device of air conditioner and air conditioner | |
| CN106352635B (en) | The progress control method and device of air-conditioning compressor | |
| CN108662725B (en) | Compressor frequency control method and device and air conditioner | |
| CN104006497B (en) | The control method and device of the cold medium flux of multi-split air conditioner | |
| CN110030686B (en) | Control method and control device of air conditioner | |
| CN109323398B (en) | Air conditioner control method and device and air conditioner | |
| CN107676939B (en) | Control method, control system and control device of fixed-frequency air conditioner | |
| CN103486689A (en) | Air conditioner control method and device | |
| CN110030707A (en) | Air-conditioning system adjusting method, air conditioner and computer readable storage medium | |
| CN108413586A (en) | The method for noise reduction control and multi-connected machine of multi-connected machine | |
| CN110057042B (en) | Control method and device of air conditioning system and computer readable storage medium | |
| CN110017590B (en) | Low-pressure control method and device for cold and hot water unit, heat pump system and storage medium | |
| CN111442481A (en) | Compressor frequency control method and control device of multi-split air conditioner | |
| CN110398030B (en) | Air conditioner air supply amount adjusting method, device and equipment and air conditioning system | |
| CN112128867A (en) | Multi-system dehumidification control method and device | |
| CN107421055A (en) | Convertible frequency air-conditioner, halt control method and computer-readable recording medium | |
| CN110779146A (en) | Air conditioner and electronic expansion valve control method thereof, storage medium and computer equipment | |
| CN115200195B (en) | Initial opening correction method and device and air conditioner | |
| CN113503631B (en) | Variable frequency compressor, frequency boosting control method and system thereof and air conditioner | |
| CN111780371B (en) | Energy-saving control method and device for air conditioner and storage medium | |
| CN113405289B (en) | Heat pump exhaust temperature adjusting method | |
| CN115076867A (en) | Electronic expansion valve control method and device, air conditioner and electronic equipment | |
| CN110081524B (en) | Outdoor unit, air conditioner, low-voltage starting method and device of air conditioner and storage medium | |
| JP2637304B2 (en) | Multi-room air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |