CN115900022B - Compressor oil return control method and device, air conditioning unit and storage medium - Google Patents
Compressor oil return control method and device, air conditioning unit and storage medium Download PDFInfo
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- CN115900022B CN115900022B CN202211526554.6A CN202211526554A CN115900022B CN 115900022 B CN115900022 B CN 115900022B CN 202211526554 A CN202211526554 A CN 202211526554A CN 115900022 B CN115900022 B CN 115900022B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000010725 compressor oil Substances 0.000 title claims abstract description 26
- 239000003921 oil Substances 0.000 claims abstract description 166
- 238000001704 evaporation Methods 0.000 claims description 24
- 238000004590 computer program Methods 0.000 claims description 16
- 238000010977 unit operation Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The application relates to a compressor oil return control method and device, an air conditioning unit and a storage medium. The method comprises the following steps: the method comprises the steps of determining the load operation state of an air conditioning unit according to the current operation frequency of a compressor, determining the start-stop scheme of an oil return electromagnetic valve based on the load operation state of the air conditioning unit, controlling the on-off state of the oil return electromagnetic valve according to the start-stop scheme even if an oil return capillary tube is overlarge during partial load operation of the air conditioning unit, and enabling the oil return electromagnetic valve to be intermittently opened so as to control the oil return quantity of the compressor, thereby avoiding bypass loss and harmful overheat of air suction of the compressor caused by the superfluous oil return quantity, and solving the technical problems that a part of bypass loss and harmful overheat of air suction of the compressor are caused when the partial load operation of the air conditioning unit is overlarge, and the actual operation energy efficiency is lower.
Description
Technical Field
The present application relates to the field of air conditioning technologies, and in particular, to a compressor oil return control method and apparatus, an air conditioning unit, and a storage medium.
Background
In the existing air conditioning unit, the oil return amount and the control method of the compressor are mainly determined by the thickness/length of an oil return capillary, and in order to ensure the reliability of the compressor, the specification of the oil return capillary is often determined according to the oil return amount required by the highest running frequency of the compressor.
The compressor is operated, the oil return electromagnetic valve is opened, and the oil return capillary tube is suitable for high-frequency operation, but when the air conditioning unit is operated under partial load, the oil return capillary tube is too large, so that a part of bypass loss and harmful overheat of the air suction of the compressor can be caused, and the problem of lower energy efficiency of actual operation is caused.
Disclosure of Invention
The application provides a compressor oil return control method and device, an air conditioning unit and a storage medium, and aims to solve the technical problem that when the air conditioning unit is operated under partial load, an oil return capillary tube is too large, so that a part of bypass loss and harmful overheat of air suction of the compressor are caused, and the actual operation energy efficiency is low.
In a first aspect, the present application provides a compressor oil return control method, including:
determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
And controlling the switching state of the oil return electromagnetic valve according to the start-stop scheme, wherein the switching state of the oil return electromagnetic valve is used for controlling the oil return amount of the compressor.
In a second aspect, the present application provides a compressor oil return control device, comprising:
The scheme determining module is used for determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
And the control module is used for controlling the switching state of the oil return electromagnetic valve according to the start-stop scheme, wherein the switching state of the oil return electromagnetic valve is used for controlling the oil return quantity of the compressor.
In a third aspect, the present application provides an air conditioning unit comprising a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the following steps when executing the computer program:
determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
And controlling the switching state of the oil return electromagnetic valve according to the start-stop scheme, wherein the switching state of the oil return electromagnetic valve is used for controlling the oil return amount of the compressor.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
And controlling the switching state of the oil return electromagnetic valve according to the start-stop scheme, wherein the switching state of the oil return electromagnetic valve is used for controlling the oil return amount of the compressor.
Based on the compressor oil return control method, the load operation state of the air conditioning unit is determined according to the current operation frequency of the compressor, the start-stop scheme of the oil return electromagnetic valve is determined based on the load operation state of the air conditioning unit, when the air conditioning unit is operated under partial load, even if the oil return capillary tube is overlarge, the on-off state of the oil return electromagnetic valve is controlled according to the start-stop scheme, the oil return electromagnetic valve is intermittently opened, so that the oil return quantity of the compressor is controlled, the bypass loss and the harmful overheat of the air suction of the compressor caused by the superfluous oil return quantity are avoided, and the technical problems that a part of bypass loss and the harmful overheat of the air suction of the compressor are caused when the air conditioning unit is operated under partial load are solved, and the actual operation energy efficiency is low are caused.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is an application environment diagram of a compressor oil return control method in one embodiment;
FIG. 2 is a flow chart of a compressor oil return control method in one embodiment;
FIG. 3 is a control waveform diagram of a compressor oil return control method in one embodiment;
FIG. 4 is a block diagram of a compressor oil return control device in one embodiment;
fig. 5 is an internal structural view of an air conditioning unit according to one embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is an application environment diagram of a compressor oil return control method in one embodiment. Referring to fig. 1, the compressor oil return control method is applied to an air conditioning unit. The air conditioning unit includes a compressor 110, an oil return solenoid valve 120, an oil return capillary 130, an oil separator 140, and the like. As shown in fig. 1, the compressor 110 is connected to an oil separator 140 and an oil return solenoid valve 120, respectively, and the oil separator 140, the oil return capillary 130 and the oil return solenoid valve 120 are connected in sequence, and the on-off state of the oil return solenoid valve 120 is used for controlling the oil return amount of the compressor 110.
In one embodiment, fig. 2 is a flow chart of a compressor oil return control method according to one embodiment, and referring to fig. 2, a compressor oil return control method is provided. The embodiment is mainly exemplified by the method applied to the air conditioning unit in fig. 1, and the compressor oil return control method specifically includes the following steps:
Step S210, determining a start-stop scheme of the oil return electromagnetic valve 120 according to the detected current operating frequency of the compressor 110, where the current operating frequency is used to indicate a load operating state of an air conditioning unit, and the air conditioning unit includes the compressor 110 and the oil return electromagnetic valve 120.
Specifically, when the current operating frequency of the compressor 110 is higher, the load operating state of the air conditioning unit is indicated to be high-load operation, when the current operating frequency of the compressor 110 is lower, the load operating state of the air conditioning unit is indicated to be low-load operation, the oil return amounts required by the compressors 110 are different in different load operating states, the oil return amount required by the compressors 110 is larger in the high-load operation, and the oil return amount required by the compressors 110 is smaller in the low-load operation. Under the condition that the specification of the oil return capillary tube 130 is determined, the oil return amount of the compressor 110 cannot be reduced by adjusting the thickness of the oil return capillary tube 130 during low-load operation of the air conditioning unit, and at this time, the excessive oil return amount can cause bypass loss and harmful overheat of the air suction of the compressor 110, so that the oil return amount of the compressor 110 needs to be controlled by changing the on-off state of the oil return electromagnetic valve 120, and particularly, the start-stop scheme of the oil return electromagnetic valve 120 is determined according to the current operating frequency of the compressor 110.
Step S220, controlling the on-off state of the oil return solenoid valve 120 according to the start-stop scheme, wherein the on-off state of the oil return solenoid valve 120 is used for controlling the oil return amount of the compressor 110.
Specifically, the on-off state of the oil return solenoid valve 120 is controlled according to the start-stop scheme, so that the oil return solenoid valve 120 is intermittently opened, thereby controlling the oil return amount of the compressor 110, avoiding the bypass loss and the harmful overheat of the air suction of the compressor 110 caused by the redundant oil return amount, and solving the technical problem that the bypass loss and the harmful overheat of the air suction of the compressor 110 are caused by overlarge oil return capillary tube 130 when the air conditioning unit is operated under partial load, so that the actual operation energy efficiency is lower.
In one embodiment, the determining the start-stop scheme of the oil return solenoid valve 120 according to the detected current operating frequency of the compressor 110 includes:
Acquiring unit operation parameters of the air conditioning unit under the condition that the current operation frequency is between a first preset frequency and a second preset frequency;
a start-stop scheme for the oil return solenoid valve 120 is determined based on the unit operating parameters.
Specifically, the first preset frequency and the second preset frequency are used for indicating different load operation states, the second preset frequency is smaller than the first preset frequency, when the current operation frequency of the compressor 110 is located between the first preset frequency and the second preset frequency, the air conditioning unit is indicated to perform partial load operation, a larger oil return amount is not needed, at this time, the unit operation parameters of the air conditioning unit are combined to determine a start-stop scheme of the oil return electromagnetic valve 120, the unit operation parameters can include refrigeration amount, heating amount, circulating air volume, dehumidification amount, performance coefficient, ambient temperature, condensing pressure, evaporating pressure, continuous operation duration and the like, and the start-stop scheme of the oil return electromagnetic valve 120 can be determined according to one or more parameters of the unit operation parameters, so that the start-stop scheme of the oil return electromagnetic valve 120 considers operation conditions of various parameters, and negative influence of the start-stop scheme of the oil return electromagnetic valve 120 on operation of the air conditioning unit is avoided.
In one embodiment, the unit operation parameters include a condensation pressure, an evaporation pressure, and a continuous operation duration, and the determining the start-stop scheme of the oil return solenoid valve 120 according to the unit operation parameters includes:
And determining a start-stop scheme of the oil return electromagnetic valve 120 according to the condensing pressure and the evaporating pressure when the continuous operation time reaches a preset time.
Specifically, the preset duration is marked as T, when the continuous operation duration of the air conditioning unit reaches the preset duration, which indicates that the operation of the air conditioning unit is in a stable state, but not just in a starting state, the start-stop scheme of the oil return electromagnetic valve 120 can be determined according to the condensation pressure and the evaporation pressure in the combination unit operation parameters, specifically, the start-stop scheme of the oil return electromagnetic valve 120 can be used as the start-stop scheme of the oil return electromagnetic valve 120 according to the preset scheme corresponding to the condensation pressure or the evaporation pressure, or the start-stop scheme of the oil return electromagnetic valve 120 can be determined according to the comparison result between the condensation pressure and the evaporation pressure.
In one embodiment, the determining the start-stop scheme of the oil return solenoid valve 120 according to the condensing pressure and the evaporating pressure includes:
and determining the start-stop duty ratio of the oil return electromagnetic valve 120 according to a start-stop correction coefficient corresponding to a preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs, wherein the start-stop scheme comprises the start-stop duty ratio.
Specifically, the difference between the condensing pressure and the evaporating pressure is recorded as Δt, Δt=p 1-P2,P1 is the condensing pressure, P 2 is the evaporating pressure, a preset difference interval to which the difference belongs is determined, the preset difference interval specifically includes a first preset interval, a second preset interval, and a third preset interval, the first preset interval is (0, X), the second preset interval is (X, Y), and the third preset interval is greater than Y, where X and Y specifically may be configured in a user-defined manner according to an actual application scenario, each preset interval corresponds to a different start-stop correction coefficient, and the start-stop duty ratio of the oil return solenoid valve 120 is determined according to the start-stop correction coefficient corresponding to the difference interval to which the difference belongs.
In one embodiment, the start-stop correction coefficient includes a start-stop correction coefficient and a close correction coefficient, and determining the start-stop duty cycle of the oil return solenoid valve 120 according to the start-stop correction coefficient corresponding to a preset difference interval to which the difference between the condensation pressure and the evaporation pressure belongs includes:
Generating a target opening duration of the oil return electromagnetic valve 120 according to the product of the opening correction coefficient corresponding to the preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs and a preset starting duration;
And generating a target closing duration of the oil return electromagnetic valve 120 according to the product of a closing correction coefficient corresponding to a preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs and a preset closing duration, wherein the target starting duration and the target closing duration indicate the start-stop duty ratio of the oil return electromagnetic valve 120.
Specifically, as shown in the table below, different preset difference intervals correspond to different start-stop correction coefficients, the start-stop correction coefficients include a start-up correction coefficient i and a close correction coefficient a, wherein X is greater than Y,1 is greater than i1 and less than i2 and less than i3,1 is greater than a1 and less than a2 and less than a3, and specific values can be set in a self-defined manner according to practical application scenarios.
For example, in the case that the difference value is located in the first preset interval, the start correction coefficient i1 is multiplied by the preset start duration T1 to obtain the target opening duration T1 of the oil return solenoid valve 120; the closing correction coefficient a1 is multiplied by a preset closing time T2 to obtain a target closing time T2 of the oil return electromagnetic valve 120, as shown in fig. 3, the oil return electromagnetic valve 120 is opened for a time T1, the time T2 is closed, namely, the oil return electromagnetic valve is opened according to the time T1, and the oil return electromagnetic valve is closed according to the time T2, so that the start-stop duty ratio is indicated according to the target opening time and the target closing time, the oil return electromagnetic valve 120 is intermittently closed, and the oil return quantity of the compressor 110 is reduced.
Under the condition that the operating frequency of the compressor 110 is dynamically changed, a proper start-stop duty ratio can be determined according to corresponding unit operating parameters so as to dynamically adjust the on-off state of the oil return electromagnetic valve 120, under the condition that the operating frequency of the compressor 110 is higher, the on-time of the oil return electromagnetic valve 120 can be increased, and the off-time of the oil return electromagnetic valve 120 can be reduced so as to increase the oil return amount of the compressor 110; in the case that the operation frequency of the compressor 110 is low, the turn-off duration of the oil return solenoid valve 120 may be increased, and the turn-on duration of the oil return solenoid valve 120 may be reduced, so as to reduce the oil return amount of the compressor 110.
In one embodiment, the determining the start-stop scheme of the oil return solenoid valve 120 according to the detected current operating frequency of the compressor 110 includes:
And taking a closing scheme as a start-stop scheme of the oil return electromagnetic valve 120 under the condition that the current operating frequency is smaller than a second preset frequency.
Specifically, when the current running frequency of the compressor 110 is smaller than the second preset frequency, the requirement of the compressor 110 for the oil return amount is very small, and the closing scheme is used as the start-stop scheme of the oil return electromagnetic valve 120 for saving energy, namely, when the compressor 110 is opened, the oil return electromagnetic valve 120 is closed, and when the compressor 110 is stopped, the oil return electromagnetic valve 120 is also closed, so that the bypass loss caused by the redundant oil return amount and the harmful overheat of the air suction of the compressor 110 are avoided, and the oil return resource is saved.
In one embodiment, the determining the start-stop scheme of the oil return solenoid valve 120 according to the detected current operating frequency of the compressor 110 includes:
And taking a switching scheme of the compressor 110 as a start-stop scheme of the oil return electromagnetic valve 120 when the current running frequency is greater than a first preset frequency, wherein the switching scheme is used for enabling the switching state of the oil return electromagnetic valve 120 to be the same as the switching state of the compressor 110.
Specifically, when the current running frequency of the compressor 110 is greater than the first preset frequency, which means that the compressor 110 is in high-frequency running, generally means that the air conditioning unit is in a starting running stage, a defrosting and oil returning stage, and the air conditioning unit is in high-load running, and the required oil returning amount is large, the on-off state of the oil returning electromagnetic valve 120 is synchronously controlled according to the on-off state of the normal control compressor 110, that is, when the compressor 110 is on, the oil returning electromagnetic valve 120 is in an on state, and when the compressor 110 is off, the oil returning electromagnetic valve 120 is closed, so as to meet the oil returning amount requirement of the compressor 110.
Based on the above embodiment, the band-type oil return control is realized, by detecting the current operating frequency, continuous operating duration, condensing pressure and evaporating pressure of the compressor 110 of the air conditioning unit, under the condition that the specification of the oil return capillary 130 is determined, the start-stop scheme of the oil return electromagnetic valve 120 is intelligently determined, and the oil return electromagnetic valve 120 is controlled to be started or closed according to the start-stop scheme, so that bypass loss and harmful overheat of the air suction of the compressor 110 are reduced, and the actual operating energy efficiency of the air conditioning unit is improved.
Fig. 2 is a flow chart of a compressor oil return control method in one embodiment. It should be understood that, although the steps in the flowchart of fig. 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
In one embodiment, as shown in fig. 4, there is provided a compressor oil return control device including:
A scheme determining module 310, configured to determine a start-stop scheme of the oil return solenoid valve 120 according to a detected current operating frequency of the compressor 110, where the current operating frequency is used to indicate a load operating state of an air conditioning unit, and the air conditioning unit includes the compressor 110 and the oil return solenoid valve 120;
the control module 320 is configured to control a switching state of the oil return solenoid valve 120 according to the start-stop scheme, where the switching state of the oil return solenoid valve 120 is used to control an oil return amount of the compressor 110.
In one embodiment, the scheme determination module 310 is further configured to:
Acquiring unit operation parameters of the air conditioning unit under the condition that the current operation frequency is between a first preset frequency and a second preset frequency;
a start-stop scheme for the oil return solenoid valve 120 is determined based on the unit operating parameters.
In one embodiment, the scheme determination module 310 is further configured to:
And determining a start-stop scheme of the oil return electromagnetic valve 120 according to the condensing pressure and the evaporating pressure when the continuous operation time reaches a preset time.
In one embodiment, the scheme determination module 310 is further configured to:
and determining the start-stop duty ratio of the oil return electromagnetic valve 120 according to a start-stop correction coefficient corresponding to a preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs, wherein the start-stop scheme comprises the start-stop duty ratio.
In one embodiment, the scheme determination module 310 is further configured to:
Generating a target opening duration of the oil return electromagnetic valve 120 according to the product of the opening correction coefficient corresponding to the preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs and a preset starting duration;
And generating a target closing duration of the oil return electromagnetic valve 120 according to the product of a closing correction coefficient corresponding to a preset difference interval to which the difference between the condensing pressure and the evaporating pressure belongs and a preset closing duration, wherein the target starting duration and the target closing duration indicate the start-stop duty ratio of the oil return electromagnetic valve 120.
In one embodiment, the scheme determination module 310 is further configured to:
And taking a closing scheme as a start-stop scheme of the oil return electromagnetic valve 120 under the condition that the current operating frequency is smaller than a second preset frequency.
In one embodiment, the scheme determination module 310 is further configured to:
And taking a switching scheme of the compressor 110 as a start-stop scheme of the oil return electromagnetic valve 120 when the current running frequency is greater than a first preset frequency, wherein the switching scheme is used for enabling the switching state of the oil return electromagnetic valve 120 to be the same as the switching state of the compressor 110.
Fig. 5 shows an internal structural diagram of an air conditioning unit in one embodiment. The air conditioning unit may specifically be the air conditioning unit in fig. 1. As shown in fig. 5, the air conditioning unit includes a processor, a memory, a network interface, an input device, and a display screen connected through a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the air conditioning unit stores an operating system and may also store a computer program which, when executed by a processor, causes the processor to implement a compressor oil return control method. The internal memory may also store a computer program which, when executed by the processor, causes the processor to perform the compressor oil return control method. The display screen of the air conditioning unit can be a liquid crystal display screen or an electronic ink display screen, the input device of the air conditioning unit can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the air conditioning unit, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 5 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the air conditioning unit to which the present inventive arrangements are applied, and that a particular air conditioning unit may include more or fewer components than shown, or may combine certain components, or may have a different arrangement of components.
In one embodiment, the compressor oil return control device provided by the application can be implemented in the form of a computer program, and the computer program can be run on an air conditioning unit as shown in fig. 5. The memory of the air conditioning unit may store various program modules constituting the compressor oil return control device, such as the scheme determination module 310 and the control module 320 shown in fig. 4. The computer program constituted by the respective program modules causes the processor to execute the steps in the compressor oil return control method of the respective embodiments of the present application described in the present specification.
The air conditioning unit shown in fig. 5 may determine a start-stop scheme of the oil return solenoid valve 120 according to a detected current operation frequency of the compressor 110, which is used to indicate a load operation state of the air conditioning unit including the compressor 110 and the oil return solenoid valve 120, by the scheme determination module 310 in the compressor oil return control device shown in fig. 4. The air conditioning unit may control the on-off state of the oil return solenoid valve 120 according to the start-stop scheme through the control module 320, wherein the on-off state of the oil return solenoid valve 120 is used to control the oil return amount of the compressor 110.
In one embodiment, an air conditioning unit is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the method of any of the above embodiments when executing the computer program.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements a method as described in any of the above embodiments.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program, which may be stored on a non-transitory computer readable storage medium, and which, when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A compressor oil return control method, the method comprising:
determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
the on-off state of the oil return electromagnetic valve is controlled according to the start-stop scheme, wherein the on-off state of the oil return electromagnetic valve is used for controlling the oil return amount of the compressor;
Acquiring unit operation parameters of the air conditioning unit under the condition that the current operation frequency is between a first preset frequency and a second preset frequency, wherein the unit operation parameters comprise condensing pressure, evaporating pressure and continuous operation time;
Generating a target opening duration of the oil return electromagnetic valve according to the product of a starting correction coefficient corresponding to a preset difference value interval to which a difference value between the condensing pressure and the evaporating pressure belongs and a preset starting duration under the condition that the continuous operation duration reaches the preset duration;
Generating a target closing time length of the oil return electromagnetic valve according to a product of a closing correction coefficient corresponding to a preset difference value interval to which a difference value between the condensing pressure and the evaporating pressure belongs and a preset closing time length, wherein the target starting time length and the target closing time length indicate a start-stop duty ratio of the oil return electromagnetic valve, and the start-stop scheme comprises the start-stop duty ratio.
2. The method of claim 1, wherein determining a start-stop scheme for the oil return solenoid valve based on the detected current operating frequency of the compressor comprises:
and taking a closing scheme as a start-stop scheme of the oil return electromagnetic valve under the condition that the current operating frequency is smaller than a second preset frequency.
3. The method of claim 1, wherein determining a start-stop scheme for the oil return solenoid valve based on the detected current operating frequency of the compressor comprises:
And under the condition that the current running frequency is larger than a first preset frequency, taking a switching scheme of the compressor as a start-stop scheme of the oil return electromagnetic valve, wherein the switching scheme is used for enabling the switching state of the oil return electromagnetic valve to be the same as the switching state of the compressor.
4. An oil return control device for a compressor, the device comprising:
The scheme determining module is used for determining a start-stop scheme of an oil return electromagnetic valve according to the detected current operating frequency of the compressor, wherein the current operating frequency is used for indicating a load operating state of an air conditioning unit, and the air conditioning unit comprises the compressor and the oil return electromagnetic valve;
The control module is used for controlling the on-off state of the oil return electromagnetic valve according to the start-stop scheme, wherein the on-off state of the oil return electromagnetic valve is used for controlling the oil return amount of the compressor;
The scheme determination module is further configured to:
Acquiring unit operation parameters of the air conditioning unit under the condition that the current operation frequency is between a first preset frequency and a second preset frequency, wherein the unit operation parameters comprise condensing pressure, evaporating pressure and continuous operation time;
Generating a target opening duration of the oil return electromagnetic valve according to the product of a starting correction coefficient corresponding to a preset difference value interval to which a difference value between the condensing pressure and the evaporating pressure belongs and a preset starting duration under the condition that the continuous operation duration reaches the preset duration;
Generating a target closing time length of the oil return electromagnetic valve according to a product of a closing correction coefficient corresponding to a preset difference value interval to which a difference value between the condensing pressure and the evaporating pressure belongs and a preset closing time length, wherein the target starting time length and the target closing time length indicate a start-stop duty ratio of the oil return electromagnetic valve, and the start-stop scheme comprises the start-stop duty ratio.
5. An air conditioning assembly comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any one of claims 1 to 3 when the computer program is executed by the processor.
6. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 3.
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