CN113639390B - Control method and system of air conditioner compressor - Google Patents
Control method and system of air conditioner compressor Download PDFInfo
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- CN113639390B CN113639390B CN202110807221.XA CN202110807221A CN113639390B CN 113639390 B CN113639390 B CN 113639390B CN 202110807221 A CN202110807221 A CN 202110807221A CN 113639390 B CN113639390 B CN 113639390B
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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
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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
- F24F11/62—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
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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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
Abstract
The invention relates to the technical field of air conditioner control, in particular to a control method and a control system of an air conditioner compressor, and aims to solve the problems that the existing compressor has a single oil return process control mode and poor oil return effect. After the compressor is detected to be started, a control result of oil return control of the last compressor is obtained, oil return control is performed on the compressor in an oil return control mode matched with the control result, and after oil return control is completed, oil return control is selectively performed on the compressor next time according to the actual operation state of the air conditioner, so that the problems that the oil return control process of the last time cannot be executed or is not executed due to abnormal conditions in the oil return control process of the last time, the oil return of the compressor is incomplete, the oil return effect is poor, and the performance of the compressor is influenced can be effectively avoided; meanwhile, the oil return effect of the compressor in a stable operation stage can be ensured.
Description
Technical Field
The invention relates to the technical field of air conditioner control, and particularly provides a control method and a control system for an air conditioner compressor.
Background
An air conditioner compressor plays a role of compressing a driving refrigerant in an air conditioner refrigerant circuit, and thus the compressor is very important during the operation of the air conditioner. When the compressor is in operation, the situation that the compressor is lack of oil often occurs.
In the prior art, a main control mode is automatic oil return aiming at the condition that the compressor is lack of oil, namely, the compressor automatically enters an oil return mode after running for a period of time. Although the control mode plays a role in oil return to a certain extent, the control method is relatively single, and if abnormal conditions occur, such as a compressor failure or the fact that oil return cannot be normally executed due to shutdown of the compressor, the conditions of incomplete oil return and the like are caused, and the overall oil return effect is poor.
Disclosure of Invention
The invention aims to solve the technical problems, namely, the problems that the control mode of the oil return process of the existing compressor is single and the oil return effect is poor are solved, and the invention provides a control method and a control system of an air conditioner compressor.
In a first aspect, the present invention provides a control method of an air conditioner compressor, the control method comprising:
after detecting that the compressor enters a starting stage, acquiring a control result of oil return control of the compressor at the last time;
and performing oil return control on the compressor by adopting an oil return control mode matched with the control result, and selectively performing oil return control on the compressor for the next time according to the actual running state of the air conditioner after the oil return control is completed.
In one technical solution of the control method of the air conditioning compressor, the step of performing oil return control on the compressor by using an oil return control mode matched with the control result includes:
if the control result is that the normal operation is finished, the oil return control mode comprises that the oil return control is not carried out on the compressor;
if the control result is that a fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtain the actual operation frequency of the compressor after the compressor operates for a first time, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues for a second time;
if the control result is that the compressor is shut down and oil return is not performed or oil return time is started and oil return is not performed, the oil return control mode comprises the steps of obtaining the starting frequency of the compressor in the starting process of the compressor, taking the sum of the starting frequency and the frequency of the first frequency as an oil return operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish starting after lasting for a third time; and/or the like and/or,
before the step of "obtaining a control result of oil return control of the compressor last time", the control method further includes:
detecting whether an overcurrent fault occurs in the compressor; if yes, performing compressor oil preheating control on the compressor to relieve the overcurrent fault.
In one aspect of the above method for controlling an air conditioner compressor, the step of "selectively performing oil return control on the compressor for the next time according to an actual operation state of the air conditioner" includes:
acquiring the length of a piping of the compressor and a target evaporation temperature set value, and determining the accumulated operation time length set value of the compressor in different operation frequency intervals according to the length of the piping and the target evaporation temperature set value;
acquiring actual accumulated running time of the compressor in different running frequency intervals;
when the actual accumulated running time of any running frequency interval reaches a corresponding accumulated running time set value, acquiring the actual running frequency of the compressor, determining an oil return running frequency according to the actual running frequency, performing oil return control on the compressor according to the oil return running frequency, controlling the compressor to continue running according to the actual running frequency after the compressor lasts for a second time, resetting the actual accumulated running time of different running frequency intervals, and skipping to the step of acquiring the actual accumulated running time of the compressor in different running frequency intervals.
In one aspect of the above method for controlling an air conditioning compressor, the step of determining an accumulated operating time period setting value of the compressor in different frequency intervals according to the pipe length and the target evaporating temperature setting value includes:
determining the type of the compressor according to the length of the piping;
determining a target evaporation temperature interval where the target evaporation temperature set value is located according to the target evaporation temperature set value;
determining the accumulated running time length set values of the compressor in different running frequency intervals according to the piping type of the compressor and the target evaporation temperature interval in which the target evaporation temperature set value is positioned;
the pipe type of the compressor comprises a standard pipe and a long pipe, wherein the pipe length of the standard pipe is less than or equal to a length threshold value, and the pipe length of the long pipe is greater than the length threshold value;
and/or the like, and/or,
the step of determining the oil return operation frequency according to the actual operation frequency comprises the following steps:
determining an oil return frequency raising frequency corresponding to the operation frequency interval according to the operation frequency interval in which the actual operation frequency is located;
and determining the oil return operation frequency according to the sum of the actual operation frequency and the oil return frequency raising frequency.
In one embodiment of the above method for controlling an air conditioning compressor, "performing compressor oil preheating control on the compressor" specifically includes:
after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again;
if the compressor is successfully started, jumping to the step of acquiring the control result of oil return control of the last compressor;
and if the compressor is not successfully started, jumping to the step of controlling the compressor to re-enter the starting stage for re-starting after the compressor oil is preheated for the fourth time, and stopping the compressor oil preheating control until the compressor is successfully started or the number of times of re-entering the starting stage reaches the number threshold.
In a second aspect, the present invention provides a control system of an air conditioner compressor, the control system comprising:
the oil return control result acquisition module is configured to acquire a control result of oil return control performed by the compressor last time after the compressor is detected to enter a starting stage;
and the oil return control module is configured to perform oil return control on the compressor in an oil return control mode matched with the control result, and selectively perform next oil return control on the compressor according to the actual running state of the air conditioner after the oil return control is completed.
In an aspect of the control system of the air conditioner compressor, the oil return control module is further configured to perform oil return control on the compressor according to the following steps:
if the control result is that the normal operation is finished, the oil return control mode comprises that the oil return control is not carried out on the compressor;
if the control result is that a fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtain the actual operation frequency of the compressor after the compressor operates for a first time, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues for a second time;
if the control result is that the compressor is shut down and oil return is not performed or oil return time is started and oil return is not performed, the oil return control mode comprises the steps of obtaining the starting frequency of the compressor in the starting process of the compressor, taking the sum of the starting frequency and the frequency of the first frequency as an oil return operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish starting after lasting for a third time; and/or the like and/or,
the control system further comprises:
a compressor oil warm-up module configured to detect whether an over-current fault occurs in the compressor; if yes, performing compressor oil preheating control on the compressor to relieve the overcurrent fault.
In one embodiment of the control system of the air conditioner compressor, the oil return control module includes:
a time length set value acquisition unit configured to acquire a piping length of the compressor and a target evaporation temperature set value, and determine an accumulated operation time length set value of the compressor in different operation frequency intervals according to the piping length and the target evaporation temperature set value;
an accumulated time period acquisition unit configured to acquire actual accumulated operation time periods of the compressor in different operation frequency intervals;
and the oil return control unit is configured to acquire the actual operation frequency of the compressor when the actual accumulated operation time of any one operation frequency interval reaches a corresponding accumulated operation time set value, determine the oil return operation frequency according to the actual operation frequency, perform oil return control on the compressor according to the oil return operation frequency, control the compressor to continue to operate according to the actual operation frequency after the compressor lasts for a second time, clear the actual accumulated operation time of different operation frequency intervals, and then operate the accumulated time acquisition unit to acquire the actual accumulated operation time of the compressor in different operation frequency intervals through the accumulated time acquisition unit.
In one embodiment of the above air conditioner compressor control system, the time period setting value obtaining unit includes:
a piping type acquisition subunit configured to determine a piping type of the compressor according to the piping length;
an evaporation temperature interval acquisition subunit configured to determine, according to the target evaporation temperature setting value, a target evaporation temperature interval in which the target evaporation temperature setting value is located;
a time length set value obtaining subunit, configured to determine the accumulated operation time length set value of the compressor in different operation frequency intervals according to the piping type of the compressor and the target evaporation temperature interval in which the target evaporation temperature set value is located;
the pipe type of the compressor comprises a standard pipe and a long pipe, wherein the pipe length of the standard pipe is less than or equal to a length threshold value, and the pipe length of the long pipe is greater than the length threshold value;
and/or the like and/or,
the oil return control module and/or the oil return control unit comprise:
the frequency-increasing frequency obtaining subunit is configured to determine, according to an operation frequency interval in which the actual operation frequency is located, an oil return frequency-increasing frequency corresponding to the operation frequency interval;
a return operating frequency acquisition subunit configured to determine the return operating frequency from a sum of the actual operating frequency and the return frequency ramp-up frequency.
In an embodiment of the control system for an air conditioning compressor, the compressor oil preheating module is further configured to preheat oil for a plurality of compressors according to the following steps:
after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again;
if the compressor is successfully started, the oil return control result acquisition module is operated to acquire a control result of oil return control of the compressor at the last time through the oil return control result acquisition module;
and if the compressor is not started successfully, jumping to a step of controlling the compressor to re-enter the starting stage for starting again after the compressor oil is preheated for the fourth time, and stopping the compressor oil preheating control until the compressor is started successfully or the number of times of re-entering the starting stage reaches a number threshold.
Under the condition of adopting the technical scheme, the invention can obtain the control result of the last oil return control of the compressor after detecting that the compressor enters the starting stage, carry out the oil return control on the compressor according to the matching of the control result of the last oil return control and the oil return control mode, and selectively carry out the next oil return control on the compressor according to the actual running state of the air conditioner after the oil return control is finished. Based on the configuration mode, the oil return control can be performed on the compressor according to the control result of the last oil return control after the compressor enters the starting stage, so that the problems that the oil return of the compressor is incomplete, the oil return effect is poor and the performance of the compressor is influenced because the last oil return control process cannot be executed or is not executed and finished due to abnormal conditions such as compressor failure or shutdown and the like in the last oil return control process can be effectively avoided; and the oil return control is selectively carried out on the compressor for the next time according to the actual running state of the air conditioner, so that the oil return effect of the compressor in a stable running stage can be ensured.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are for illustrative purposes only and are not intended to constitute a limitation on the scope of the present invention. Wherein:
fig. 1 is a flow chart illustrating main steps of a control method of an air conditioner compressor according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating main steps of oil return control of a compressor according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating the main steps of compressor oil pre-heating control performed by the compressor according to one embodiment of the present invention;
fig. 4 is a main block diagram of a control system of an air conditioner compressor according to an embodiment of the present invention.
Detailed Description
Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module" or "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, or may be a combination of software and hardware. The term "a and/or B" denotes all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" means similar to "A and/or B" and may include only A, only B, or both A and B. The singular forms "a", "an" and "the" may include the plural forms as well.
After the air conditioner compressor is started, the frequency of the air conditioner compressor is increased from zero to the starting frequency of the compressor within a short time, and the frequency increasing process is the starting stage of the compressor. After the compressor reaches the starting frequency, the frequency can be adjusted according to the actual running condition of the air conditioner so as to adapt to the requirement of the running process of the air conditioner, and the process is the stable running stage of the compressor.
In the prior art, an air conditioner compressor enters a stable operation stage after a starting stage, and the compressor automatically returns oil according to the operation duration in the stable operation stage. The oil return mode is relatively single in control mode, and although the oil return effect can be achieved to a certain extent, when the compressor encounters an abnormal condition, for example, the oil return is not completed due to a compressor failure or shutdown of the compressor, the problems of incomplete oil return, poor oil return effect and the like of the compressor can be caused, and the performance of the compressor is further affected.
In the embodiment of the invention, a control method and a control system of an air conditioner compressor are provided to solve the problems.
Referring to fig. 1, fig. 1 is a flow chart illustrating main steps of a control method of an air conditioner compressor according to an embodiment of the present invention. As shown in fig. 1, the control method of the air conditioner compressor in the embodiment of the present invention mainly includes the following steps S101 to S103.
Step S101: and after detecting that the compressor enters a starting stage, acquiring a control result of oil return control of the last compressor.
In this embodiment, after the compressor is detected to enter the starting stage, the control result of the oil return control performed by the previous compressor may be obtained.
Step S102: and performing oil return control on the compressor by adopting an oil return control mode matched with the control result.
In this embodiment, an oil return control manner matching the control result may be adopted to perform oil return control on the compressor. That is, it is possible to match different oil return control manners according to different control results of the last oil return control obtained in step S101, and perform oil return control on the compressor according to the matched oil return control manner.
Step S103: and selectively performing oil return control on the compressor for the next time according to the actual running state of the air conditioner.
In the present embodiment, after the oil return control of step S102 is completed, the oil return control may be selectively performed on the compressor for the next time according to the actual operation state of the air conditioner.
In one embodiment, after the oil return control in step S102 is completed, the air conditioner enters the stable operation stage from the start stage, and the oil return control is performed on the compressor for the next time according to the actual operation state of the stable operation stage of the air conditioner.
Based on the above steps S101 to S103, in the embodiment of the present invention, after it is detected that the compressor enters the start stage, a control result of oil return control performed by the previous compressor is obtained, an oil return control mode is matched according to the control result, oil return control is performed on compression according to the oil return control mode, and after the oil return control is completed, the next oil return control is selectively performed on the compressor according to the actual operation state of the air conditioner. Based on the configuration mode, the oil return control can be performed on the compressor according to the control result of the last oil return control after the compressor enters the starting stage, so that the problems that the oil return of the compressor is incomplete, the oil return effect is poor and the performance of the compressor is influenced because the last oil return control process cannot be executed or is not executed and finished due to abnormal conditions such as compressor failure or shutdown and the like in the last oil return control process can be effectively avoided; and the oil return control is selectively carried out on the compressor for the next time according to the actual running state of the air conditioner, so that the oil return effect of the compressor in a stable running stage can be ensured.
Step S102 and step S103 will be further described below.
In an optional implementation manner of the embodiment of the present invention, step S102 may further include:
step S1021: and if the control result is that the control is normally finished, the oil return control mode comprises that the oil return control is not carried out on the compressor.
In the present embodiment, after the compressor enters the start stage, if the control result of the oil return control performed by the compressor last time is normally finished, the oil return control may not be performed in the start stage of the compressor, and the compressor may be normally started.
Step S1022: and if the control result is that the fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtaining the actual operation frequency of the compressor after the compressor operates for the first time period, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues to operate for the second time period.
In this embodiment, if the control result of the oil return control performed by the last compression is that a fault occurs, the oil return control of the compressor may be performed after the compressor is started and operates for a first time period, that is, the actual operating frequency of the compressor at that time is obtained, the oil return frequency of the compressor is obtained according to the actual operating frequency of the compressor, and the compressor is controlled to continue to operate according to the actual operating frequency after the oil return frequency is applied to perform the oil return control on the compressor and continues for a second time period. Faults in this embodiment include, but are not limited to: a failed return fault in which return of oil has started but has not been completed successfully.
Step S1023: and if the control result is that the oil return is not carried out when the compressor is shut down or the oil return time is up to start and the oil return is not carried out, the oil return control mode comprises the steps of acquiring the starting frequency of the compressor in the starting process of the compressor, acquiring the starting frequency by analyzing the starting instruction, taking the sum of the starting frequency and the frequency of the first frequency as the oil return operation frequency, carrying out oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish the starting after the third duration.
In this embodiment, if the control result of the oil return control performed by the last compression is that the oil return is not performed when the compressor is turned off or the oil return time is up to the start of the oil return without performing the oil return, the start frequency of the compressor may be obtained, and the sum of the start frequency and the frequency of the first frequency is used as the oil return operation frequency, and in the starting process of the compressor, the compressor is controlled to perform the oil return control according to the oil return operation frequency and to operate according to the start frequency after the oil return control lasts for the third duration, so as to complete the starting.
In one embodiment, referring to fig. 2, fig. 2 is a schematic flow chart illustrating main steps of oil return control of a compressor according to one embodiment of the present invention. As shown in fig. 2, the step of performing oil return control according to the control result of the oil return control performed by the previous compressor may include:
step S201: the compressor enters a starting stage;
step S202: acquiring a control result of oil return control of the last compressor; if the control result is normal end, the process goes to step S203, if the control result is failure, the process goes to step S204, and if the control result is shutdown or the time for starting operation oil return is up and oil return is not performed, the process goes to step S205.
Step S203: the oil return control is not carried out on the compressor, and the next oil return control of the compressor is waited;
step S204: performing oil return control after the compressor is started for T1 time, and waiting for the next oil return control after the oil return control is finished;
step S205: in the starting process of the compressor, the starting frequency is increased, the starting frequency after the frequency is increased is used as the oil return frequency, namely, the high-frequency oil return frequency is obtained, then high-frequency oil return control is carried out according to the high-frequency oil return frequency, and the next oil return control is waited after the oil return control is finished. For example, the starting frequency obtained by adding F1 hertz (Hz) to the starting frequency is used as the oil return frequency, and after the high-frequency oil return control is performed for time T2 according to the oil return frequency, the next oil return control is waited. Wherein T1 > T2.
In the embodiment, if the control result of the oil return control of the last compressor is normal, the oil return control is not performed, and the oil return control of the stable operation stage of the compressor is selectively performed directly according to the actual operation state of the compressor; if the control result of the last oil return control of the compressor is that a fault occurs, the oil return control is performed after the compressor is started for T1 time, and after the oil return control is finished, the oil return control of the stable operation stage of the compressor is started; if the last control result of oil return control of the compressor is shutdown or oil return is not performed when the oil return time of starting operation is reached, the current compressor is considered to be in a frequent starting state, the starting frequency is increased by F1 Hertz (Hz) to serve as the oil return frequency in the starting process of the compressor, and the oil return control in the stable operation stage of the compressor is started after high-frequency oil return T2 time.
In an optional implementation manner of the embodiment of the present invention, step S103 may further include:
step S1031: acquiring the length of a piping of the compressor and a target evaporation temperature set value, and determining the accumulated running time set value of the compressor in different running frequency intervals according to the length of the piping and the target evaporation temperature set value;
step S1032: acquiring actual accumulated running time of the compressor in different running frequency intervals;
step S1033: when the actual accumulated operation time of any one operation frequency interval reaches the corresponding accumulated operation time set value, the actual operation frequency of the compressor is obtained, the oil return operation frequency is determined according to the actual operation frequency, oil return control is performed on the compressor according to the oil return operation frequency, after the second time duration continues, the compressor is controlled to continue to operate according to the actual operation frequency, the actual accumulated operation time of different operation frequency intervals is reset, and the step S1032 is skipped.
In this embodiment, the piping length of the compressor and the target evaporation temperature setting value may be obtained, and the cumulative operating time period setting value of the compressor in the different operating frequency intervals may be determined based on the piping length and the target evaporation temperature setting value. That is, the cumulative operating time period setting value of the compressor may be determined according to the pipe length of the compressor and the target evaporating temperature setting value at different operating frequency intervals. The piping of the compressor is a return pipeline connecting the compressor and the evaporator; the evaporation temperature is the temperature at which the refrigerant boils in the evaporator, i.e. the critical temperature at which the refrigerant changes from liquid to gas, and there is a correspondence between the evaporation temperature and the evaporation pressure, i.e. the evaporation temperature increases and the evaporation pressure also increases. The target evaporation temperature set value is a set value of an evaporation temperature generally derived by an air conditioner manufacturer according to a corresponding evaporation pressure. After the setting values of the accumulated operation time lengths of the compressors in different operation frequency intervals are obtained, the actual accumulated operation time lengths of the compressors in different operation frequency intervals can be continuously calculated. When the actual accumulated operation time of one of the operation frequency intervals reaches a set value corresponding to the accumulated operation time, acquiring the actual operation frequency of the compressor at the moment, determining an oil return operation frequency according to the actual operation frequency, controlling the compressor to perform oil return control according to the oil return operation frequency for a second time, controlling the compressor to recover to the actual operation frequency for operation, clearing the calculated actual accumulated operation time of different operation frequency intervals, skipping to the step S1032, and continuing to perform oil return control on the compressor according to the actual accumulated operation time of the compressor in different operation frequency intervals.
In one embodiment, step S1031 further includes the steps of:
step S10311: determining the type of the compressor according to the length of the piping;
step S10312: determining a target evaporation temperature interval where the target evaporation temperature set value is located according to the target evaporation temperature set value;
step S10313: and determining the accumulated running time set value of the compressor in different running frequency intervals according to the piping type of the compressor and the target evaporation temperature interval in which the target evaporation temperature set value is positioned.
The piping type of the compressor comprises standard piping and long piping, wherein the piping length of the standard piping is less than or equal to a length threshold value, and the piping length of the long piping is greater than the length threshold value.
Specifically, the type of the compressor piping may be determined according to the length of the compressor piping, wherein the type of the compressor piping may include standard piping, which is piping having a piping length equal to or less than a length threshold value, and long piping, which is piping having a piping length greater than the length threshold value. The target evaporation temperature interval where the target evaporation temperature set value is located can be determined according to the target evaporation temperature set value of the air conditioner, and the accumulated operation time length set value of the compressor in different operation frequency intervals is determined according to the piping type of the compressor and the target evaporation temperature interval where the target evaporation temperature set value is located.
For example, the operation frequency of the compressor in the stable operation stage may be divided into three frequency operation intervals, and the cumulative operation time setting values of the three frequency operation intervals are set to be A, B, C hours, respectively, that is, the cumulative operation time setting value of the compressor is a hour when the operation frequency of the compressor is less than F2 hertz (Hz), the cumulative operation time setting value of the compressor is B hours when the operation frequency of the compressor is greater than or equal to F2 hertz (Hz) and less than F3 hertz (Hz), and the cumulative operation time setting value of the compressor is C hours when the operation frequency of the compressor is greater than or equal to F3 hertz (Hz). A. B, C is related to the piping type of the compressor and the target evaporating temperature setting, and referring to table 1 and table 2, where table 1 is a cumulative operating time period setting time table for different operating frequency sections when the piping type of the compressor is a standard piping, and table 2 is a cumulative operating time period setting time table for different operating frequency sections when the piping type of the compressor is a long piping, where a piping having a piping length of more than 50m is a long piping, and a piping having a piping length of 50m or less is a standard piping.
TABLE 1 cumulative operating duration set point timetable for different operating frequency intervals when the compressor piping type is standard piping
TABLE 2 set value and time table of accumulated running time length of different running frequency intervals when the type of compressor piping is long piping
Where Etset in tables 1 and 2 indicates the target evaporation temperature set value, a11 > a12 > a13, b11 > b12 > b13, c11 > c12 > c13, a21 > a22 > a23, b21 > b22 > b23, c21 > c22 > c23, a11 > a21, b11 > b21, c11 > c21.
In one embodiment, steps S1022 and S1033 may include the steps of:
determining an oil return frequency raising frequency corresponding to an operation frequency interval according to the operation frequency interval in which the actual operation frequency is located; and determining the oil return operation frequency according to the sum of the actual operation frequency and the oil return frequency raising frequency.
Specifically, when the compressor performs oil return control in the stable operation stage, the actual operation frequency of the compressor may be obtained, an oil return frequency rising frequency corresponding to the operation frequency interval is determined according to the operation frequency interval in which the actual operation frequency is located, and the oil return frequency is determined according to the sum of the actual operation frequency and the oil return frequency rising frequency.
For an example, refer to table 3, where table 3 is a table for calculating oil return frequency of the compressor in the stable operation stage. As shown in table 3, after the compressor satisfies the condition for oil return control, the operating frequency of the compressor is increased from the actual operating frequency to the corresponding oil return frequency at a rate of 1Hz/s according to the corresponding values in the following table on the basis of the actual operating frequency of the compressor at that time.
TABLE 3 oil return frequency calculation table for compressor in stable operation stage
Wherein f1, f2 and f3 are corresponding frequency increasing values with the unit of Hz, and f1 is more than f2 and more than f3.
The control method of the air conditioner compressor in the embodiment of the present invention may further include, in addition to the above step S101 to step S103:
step S104: and detecting whether the compressor has an overcurrent fault, and if so, performing compressor oil preheating control on the compressor to relieve the overcurrent fault.
In the embodiment, if the compressor is detected to have the overcurrent fault when the compressor is started or before the starting is successfully completed, the situation that the temperature of the compressor oil is too low is illustrated, and the compressor oil preheating control can be carried out on the compressor to relieve the overcurrent fault of the compressor.
Further, in one embodiment of step S104, step S104 further includes:
step S1041: after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again;
step S1042: judging whether the compressor is successfully started or not; if the compressor is successfully started, jumping to the step S101; and if the compressor is not started successfully, jumping to step S1041 until the compressor is started successfully or the number of times of re-entering the starting stage reaches a threshold value, and stopping the compressor oil preheating control.
In this embodiment, when the over-current fault of the compressor is detected, the compressor oil may be controlled to re-enter the starting stage for starting again after being preheated for the fourth time period, if the compressor is successfully started, the step S101 is skipped, and if the compressor is not successfully started, the compressor oil is controlled to re-enter the starting stage for starting again after being continuously preheated for the fourth time period, until the compressor is successfully started or the number of times of re-entering the starting stage reaches the number threshold, the compressor oil pre-heating control is stopped. And if the number of times of the compressor is over the threshold value and the compressor is not started successfully, indicating that the reason of the overcurrent fault of the compressor is not that the oil temperature of the compressor oil is too low, and performing fault alarm.
In one embodiment, referring to fig. 3, fig. 3 is a flow chart illustrating the main steps of compressor oil preheating control of a compressor according to one embodiment of the present invention. As shown in fig. 3, the compressor oil warm-up control by the compressor mainly includes the following steps:
step S301: the compressor enters a starting stage;
step S302: judging whether the compressor has an overcurrent fault;
in this embodiment, after the compressor enters the start-up phase, if the compressor is detected to have a fault, it is determined whether the compressor has an overcurrent fault, if so, the process goes to step S303, and if not, the process goes to step S306.
Step S303: and starting the heating belt, preheating the compressor oil for T3 time, and then re-entering the starting stage.
In the present embodiment, if the compressor has an overcurrent failure, the heating belt is turned on, and the compressor oil is warmed up for T3 hours, and then the start of the compressor is retried.
Step S304: and judging whether the compressor is successfully started. If not, and the number of times of activation is less than 2, the process goes to step S303, if not, and the number of times of activation is greater than or equal to 2, the process goes to step S306, and if so, the process goes to step S305.
Step S305: and acquiring the control result of oil return control of the last compressor, and then continuing to execute the method from the step S101 to the step S103.
Step S306: and (5) fault alarm.
In the present embodiment, if the compressor is successfully started, the control result of the oil return control performed by the previous compressor is obtained, so as to perform the oil return control on the compression according to the control result. If the compressor is not started successfully, the heating belt can be started again to preheat the compressor oil for T3 time, and then the compressor is started again. And if the compressor is not successfully started twice, performing fault alarm.
In one embodiment, when the compressor is in a normal state, the compressor oil can be preheated according to the outdoor environment temperature, the exhaust temperature of the compressor and the like, so that the temperature of the compressor oil is increased, the normal operation of the compressor is ensured, meanwhile, the heating belt can be opened according to the preheating control requirement, the heating belt does not need to be opened all the time, and the overall energy consumption of the air conditioner is reduced.
Specifically, when the compressor is in a closed state and Ta is greater than th1, the heating belt is closed, and the compressor oil does not need to be preheated;
when the compressor is in a closed state, ta is more than or equal to th2 and less than or equal to th1, and Td is less than or equal to CT + th5, the heating belt is opened to preheat the compressor oil, and when Td is more than or equal to CT + th2 and lasts for T4 time or the preheating time lasts for T5 time, the heating belt is closed, and after T6 time interval, whether Ta and Td meet the heating belt opening condition is judged;
when the compressor is in a closed state, ta is more than th3 and less than or equal to th2, and Td is less than or equal to CT + th5, the heating belt is opened to preheat the compressor oil, when Td is larger than or equal to CT + th2 and lasts for T4 time or preheating time lasts for T7 time, the heating belt is closed, and after T8 time, whether Ta and Td meet the heating belt opening condition is judged;
when the compressor is in a closed state, ta is more than th4 and less than or equal to th3, and Td is less than or equal to CT + th5, the heating belt is opened to preheat the compressor oil, when Td is more than or equal to CT + th2 and lasts for T4 time or the preheating time lasts for T8 time, the heating belt is closed, and after T7 time interval, whether Ta and Td meet the heating belt opening condition is judged;
when the compressor is in a closed state, ta is less than or equal to th4, and Td is less than or equal to CT +5 ℃, the heating belt is opened to preheat the compressor oil, when Td is greater than or equal to CT + th2, the heating belt is closed for T4 time or the preheating time lasts for T6 time, and after T9 time intervals, whether Ta and Td meet the heating belt opening condition is judged;
when the compressor is in an open state (stable operation stage), ta is less than or equal to th1, and Td is less than or equal to CT + th2, the heating belt is opened, ta is greater than or equal to th6, or Td is greater than or equal to CT + th7, and the heating belt is closed;
wherein, CT: the temperature Te of the outdoor defrosting sensor is used during the refrigerating operation of the air conditioner, and the average value of the temperature TC of the coil pipe of the indoor unit is used during the heating operation; ta is the outdoor ambient temperature; td is the compressor discharge temperature; th4 is more than or equal to 0 and more than or equal to th3 and more than th5 and more than th2 and more than th1 and more than th7 and more than th6; t4 is more than T7, more than T8, more than T6 and less than T5.
It should be noted that, those skilled in the art can adaptively adjust the values of the temperature and the time according to the needs of practical applications.
It should be noted that, although the foregoing embodiments describe each step in a specific sequence, those skilled in the art will understand that, in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such a sequence, and they may be executed simultaneously (in parallel) or in other sequences, and these changes are all within the protection scope of the present invention.
Furthermore, the invention also provides a control system of the air conditioner compressor.
Referring to fig. 4, fig. 4 is a main block diagram of a control system of an air conditioner compressor according to an embodiment of the present invention. As shown in fig. 4, the control system of the air conditioner compressor in the embodiment of the present invention may include an oil return control result obtaining module and an oil return control module. In this embodiment, the oil return control result obtaining module may be configured to obtain the control result of the oil return control performed by the last compressor after the compressor is detected to enter the starting stage. The oil return control module can be configured to perform oil return control on the compressor in an oil return control mode matched with the control result, and selectively perform next oil return control on the compressor according to the actual operation state of the air conditioner after the oil return control is completed.
In one embodiment, the oil return control module may be further configured to perform oil return control on the compressor according to the following steps: if the control result is that the normal operation is finished, the oil return control mode comprises that the oil return control is not carried out on the compressor; if the control result is that a fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtaining the actual operation frequency of the compressor after the compressor operates for a first time period, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues for a second time period; and if the control result is that the oil return is not carried out when the compressor is shut down or the oil return time is up to start and the oil return is not carried out, the oil return control mode comprises the steps of acquiring the starting frequency of the compressor in the starting process of the compressor, taking the sum of the starting frequency and the frequency of the first frequency as the oil return operation frequency, carrying out oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish the starting after the oil return operation frequency lasts for a third time.
In one embodiment, the control system of the air conditioning compressor may further include a compressor oil preheating module. In the present embodiment, the compressor oil preheating module may be configured to detect whether an overcurrent fault occurs in the compressor; if yes, the compressor is subjected to compressor oil preheating control to relieve the overcurrent fault.
In one embodiment, the oil return control module may include a duration set value obtaining unit, an accumulated duration obtaining unit, and an oil return control unit. In this embodiment, the time period setting value acquisition unit may be configured to acquire a piping length of the compressor and a target evaporating temperature setting value, and determine an accumulated operating time period setting value of the compressor in different operating frequency intervals according to the piping length and the target evaporating temperature setting value. The accumulated time period acquisition unit may be configured to acquire actual accumulated operation time periods of the compressor at different operation frequency intervals. The oil return control unit can be configured to acquire the actual operation frequency of the compressor when the actual accumulated operation time of any one operation frequency interval reaches the corresponding accumulated operation time set value, determine the oil return operation frequency according to the actual operation frequency, perform oil return control on the compressor according to the oil return operation frequency, control the compressor to continue to operate according to the actual operation frequency after lasting for a second time, clear the actual accumulated operation time of different operation frequency intervals, and then operate the accumulated time acquisition unit to acquire the actual accumulated operation time of the compressor in different operation frequency intervals through the accumulated time acquisition unit.
In one embodiment, the duration setting value acquisition unit may include a piping type acquisition sub-unit, an evaporation temperature interval acquisition sub-unit, and a duration setting value acquisition sub-unit. In the present embodiment, the piping type acquisition subunit may be configured to determine the piping type of the compressor according to the piping length. The evaporation temperature interval acquisition subunit may be configured to determine, from the target evaporation temperature setting value, a target evaporation temperature interval in which the target evaporation temperature setting value is located. The time period setting value obtaining subunit may be configured to determine the accumulated operating time period setting value of the compressor in different operating frequency intervals according to the piping type of the compressor and the target evaporating temperature interval in which the target evaporating temperature setting value is located. The piping type of the compressor comprises standard piping and long piping, wherein the piping length of the standard piping is less than or equal to a length threshold value, and the piping length of the long piping is greater than the length threshold value.
In one embodiment, the oil return control module may include an up-frequency acquisition sub-unit and an oil return operation frequency acquisition sub-unit. In this embodiment, the frequency-increasing frequency acquiring subunit may be configured to determine, according to the operation frequency interval in which the actual operation frequency is located, the oil-returning frequency-increasing frequency corresponding to the operation frequency interval. The oil return operation frequency acquisition sub-unit may be configured to determine the oil return operation frequency from a sum of the actual operation frequency and the oil return frequency boost frequency.
In one embodiment, the oil return control unit may include an up-frequency acquisition sub-unit and an oil return operation frequency acquisition sub-unit. In this embodiment, the frequency-increasing frequency acquiring subunit may be configured to determine, according to the operation frequency interval in which the actual operation frequency is located, the oil-returning frequency-increasing frequency corresponding to the operation frequency interval. The oil return operation frequency acquisition sub-unit may be configured to determine the oil return operation frequency from a sum of the actual operation frequency and the oil return frequency boost frequency.
In one embodiment, the compressor oil warm-up module may be further configured to warm up oil for how many compressors according to the following steps: after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again; if the compressor is successfully started, the oil return control result acquisition module is operated to acquire the control result of oil return control of the last compressor through the oil return control result acquisition module; and if the compressor is not started successfully, jumping to a step of controlling the compressor to re-enter the starting stage for starting again after the compressor oil is preheated for the fourth time, and stopping the compressor oil preheating control until the compressor is started successfully or the number of times of re-entering the starting stage reaches a number threshold.
The above control system of the air conditioner compressor is used for executing the embodiments of the control method of the air conditioner compressor shown in fig. 1 to 3, and the technical principles, the solved technical problems and the generated technical effects of the two embodiments are similar, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related descriptions of the control system of the air conditioner compressor may refer to the contents described in the embodiments of the control method of the air conditioner compressor, and are not repeated here.
It will be understood by those skilled in the art that all or part of the flow of the method according to the above-described embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used to implement the steps of the above-described embodiments of the method when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying said computer program code, media, usb disk, removable hard disk, magnetic diskette, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunication signals, software distribution media, etc. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Further, it should be understood that, since the configuration of each module is only for explaining the functional units of the apparatus of the present invention, the corresponding physical devices of the modules may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor. Thus, the number of individual blocks in the figures is merely illustrative.
Those skilled in the art will appreciate that the various modules in the apparatus may be adaptively split or combined. Such splitting or merging of specific modules does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging all fall into the protection scope of the present invention
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioner compressor, characterized in that the control method comprises:
after detecting that the compressor enters a starting stage, acquiring a control result of oil return control of the compressor at the last time;
performing oil return control on the compressor by adopting an oil return control mode matched with the control result, and selectively performing next oil return control on the compressor according to the actual operation state of the air conditioner after the oil return control is completed;
the step of performing oil return control on the compressor by adopting an oil return control mode matched with the control result comprises the following steps:
if the control result is normal end, the oil return control mode comprises that the oil return control is not carried out on the compressor;
if the control result is that a fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtain the actual operation frequency of the compressor after the compressor operates for a first time, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues for a second time;
if the control result is that the compressor is shut down and oil return is not carried out or the oil return time is started and oil return is not carried out, the oil return control mode comprises the steps of obtaining the starting frequency of the compressor in the starting process of the compressor, taking the frequency of the starting frequency and the first frequency and the frequency as the oil return operation frequency, carrying out oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish starting after lasting for a third time.
2. The control method of an air conditioner compressor according to claim 1, wherein before the step of "obtaining a control result of the oil return control of the compressor last time", the control method further comprises:
detecting whether an overcurrent fault occurs in the compressor; if yes, performing compressor oil preheating control on the compressor to relieve the overcurrent fault.
3. The control method of an air conditioner compressor according to claim 2, wherein the step of selectively performing next oil return control of the compressor according to an actual operation state of the air conditioner comprises:
acquiring the length of a piping of the compressor and a target evaporation temperature set value, and determining the accumulated running time set value of the compressor in different running frequency intervals according to the length of the piping and the target evaporation temperature set value;
acquiring actual accumulated running time of the compressor in different running frequency intervals;
when the actual accumulated running time of any running frequency interval reaches a corresponding accumulated running time set value, acquiring the actual running frequency of the compressor, determining an oil return running frequency according to the actual running frequency, performing oil return control on the compressor according to the oil return running frequency, controlling the compressor to continue running according to the actual running frequency after the compressor lasts for a second time, resetting the actual accumulated running time of different running frequency intervals, and skipping to the step of acquiring the actual accumulated running time of the compressor in different running frequency intervals.
4. The method as claimed in claim 3, wherein the step of determining the cumulative operating time period setting value of the compressor at different frequency intervals based on the pipe length and the target evaporating temperature setting value comprises:
determining the type of the piping of the compressor according to the length of the piping;
determining a target evaporation temperature interval where the target evaporation temperature set value is located according to the target evaporation temperature set value;
determining the accumulated running time length set values of the compressor in different running frequency intervals according to the piping type of the compressor and the target evaporation temperature interval in which the target evaporation temperature set value is positioned;
the pipe type of the compressor comprises a standard pipe and a long pipe, wherein the pipe length of the standard pipe is less than or equal to a length threshold value, and the pipe length of the long pipe is greater than the length threshold value;
and/or the like and/or,
the step of determining the oil return operation frequency according to the actual operation frequency comprises the following steps:
determining an oil return frequency raising frequency corresponding to the operation frequency interval according to the operation frequency interval in which the actual operation frequency is located;
and determining the oil return operation frequency according to the sum of the actual operation frequency and the oil return frequency raising frequency.
5. The control method of an air conditioner compressor according to claim 2, wherein the step of "performing compressor oil preheating control on the compressor" specifically includes:
after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again;
if the compressor is successfully started, skipping to the step of obtaining the control result of oil return control of the compressor at the last time;
and if the compressor is not successfully started, jumping to the step of controlling the compressor to re-enter the starting stage for re-starting after the compressor oil is preheated for the fourth time, and stopping the compressor oil preheating control until the compressor is successfully started or the number of times of re-entering the starting stage reaches the number threshold.
6. A control system for an air conditioning compressor, the control system comprising:
the oil return control result acquisition module is configured to acquire a control result of oil return control of the compressor at the last time after the compressor is detected to enter a starting stage;
the oil return control module is configured to perform oil return control on the compressor in an oil return control mode matched with the control result, and selectively perform next oil return control on the compressor according to the actual operation state of the air conditioner after the oil return control is completed;
the oil return control module is further configured to perform oil return control on the compressor according to the following steps:
if the control result is that the normal operation is finished, the oil return control mode comprises that the oil return control is not carried out on the compressor;
if the control result is that a fault occurs, the oil return control mode comprises the steps of controlling the compressor to finish starting and obtain the actual operation frequency of the compressor after the compressor operates for a first time, determining the oil return operation frequency according to the actual operation frequency, performing oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to continue to operate according to the actual operation frequency after the compressor continues for a second time;
if the control result is that the compressor is shut down and oil return is not carried out or the oil return time is started and oil return is not carried out, the oil return control mode comprises the steps of obtaining the starting frequency of the compressor in the starting process of the compressor, taking the frequency of the starting frequency and the first frequency and the frequency as the oil return operation frequency, carrying out oil return control on the compressor according to the oil return operation frequency, and controlling the compressor to operate according to the starting frequency to finish starting after lasting for a third time.
7. The control system of an air conditioner compressor as claimed in claim 6, further comprising:
a compressor oil preheating module configured to detect whether an over-current fault occurs in the compressor; if yes, performing compressor oil preheating control on the compressor to relieve the overcurrent fault.
8. The control system of an air conditioning compressor of claim 7, wherein the oil return control module comprises:
a time length set value acquisition unit configured to acquire a piping length of the compressor and a target evaporation temperature set value, and determine an accumulated operation time length set value of the compressor in different operation frequency intervals according to the piping length and the target evaporation temperature set value;
an accumulated time period acquisition unit configured to acquire actual accumulated operation time periods of the compressor in different operation frequency intervals;
and the oil return control unit is configured to acquire the actual operation frequency of the compressor when the actual accumulated operation time of any one operation frequency interval reaches a corresponding accumulated operation time set value, determine the oil return operation frequency according to the actual operation frequency, perform oil return control on the compressor according to the oil return operation frequency, control the compressor to continue to operate according to the actual operation frequency after the compressor lasts for a second time, clear the actual accumulated operation time of different operation frequency intervals, and then operate the accumulated time acquisition unit to acquire the actual accumulated operation time of the compressor in different operation frequency intervals through the accumulated time acquisition unit.
9. The control system of an air conditioner compressor according to claim 8, wherein the time period setting value obtaining unit includes:
a piping type acquisition subunit configured to determine a piping type of the compressor according to the piping length;
an evaporation temperature interval acquisition subunit configured to determine, according to the target evaporation temperature set value, a target evaporation temperature interval in which the target evaporation temperature set value is located;
a time length set value obtaining subunit, configured to determine the accumulated operation time length set value of the compressor in different operation frequency intervals according to the piping type of the compressor and the target evaporation temperature interval in which the target evaporation temperature set value is located;
the pipe type of the compressor comprises a standard pipe and a long pipe, wherein the pipe length of the standard pipe is less than or equal to a length threshold value, and the pipe length of the long pipe is greater than the length threshold value;
and/or the like and/or,
the oil return control module and/or the oil return control unit comprise:
the frequency-increasing frequency obtaining subunit is configured to determine, according to an operation frequency interval in which the actual operation frequency is located, an oil return frequency-increasing frequency corresponding to the operation frequency interval;
a return operating frequency acquisition subunit configured to determine the return operating frequency from a sum of the actual operating frequency and the return frequency ramp-up frequency.
10. The control system of an air conditioning compressor of claim 7, wherein the compressor oil preheating module is further configured to preheat oil for each of the compressors according to the following steps:
after the compressor oil is preheated for the fourth time, controlling the compressor to reenter the starting stage for starting again;
if the compressor is successfully started, the oil return control result acquisition module is operated to acquire a control result of oil return control of the compressor at the last time through the oil return control result acquisition module;
and if the compressor is not started successfully, jumping to a step of controlling the compressor to re-enter the starting stage for starting again after the compressor oil is preheated for the fourth time, and stopping the compressor oil preheating control until the compressor is started successfully or the number of times of re-entering the starting stage reaches a number threshold.
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| CN114543329B (en) * | 2022-01-17 | 2023-10-20 | 青岛海尔空调器有限总公司 | Oil return control method and device for air conditioner, air conditioner and storage medium |
| CN115451612B (en) * | 2022-08-23 | 2024-02-23 | 青岛海尔空调电子有限公司 | Method and device for oil return of drying system, drying system and storage medium |
| CN115342489A (en) * | 2022-08-30 | 2022-11-15 | 宁波奥克斯电气股份有限公司 | Air conditioner frequency control method and device and air conditioner |
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| JP2001141279A (en) * | 1999-11-12 | 2001-05-25 | Matsushita Refrig Co Ltd | Diagnosing device for air conditioner |
| JP5259944B2 (en) * | 2006-10-11 | 2013-08-07 | 三菱重工業株式会社 | Air conditioner |
| JP2013087975A (en) * | 2011-10-13 | 2013-05-13 | Daikin Industries Ltd | Refrigeration apparatus |
| CN105588384B (en) * | 2014-12-10 | 2018-03-16 | 海信（山东）空调有限公司 | The method for controlling oil return and device of a kind of frequency converting air-conditioner compressor |
| CN105157294B (en) * | 2015-10-14 | 2017-12-05 | 珠海格力电器股份有限公司 | A kind of control method, system and the multiple on-line system of the oil return of multi-connected machine intelligence |
| JP6829664B2 (en) * | 2017-07-10 | 2021-02-10 | 荏原冷熱システム株式会社 | Compressed refrigerator |
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