Air conditioner control method and related device

Abstract

An air conditioner control method and a related device. The method comprises: acquiring current working condition information of a compressor (201), the current working condition information comprising current working pressure information and current rotating speed information; according to the current working condition information and preset calibration information, acquiring a current internal oil quantity of the compressor (201), the preset calibration information comprising refrigerant circulation quantity calibration information, oil circulation rate calibration information and oil separation efficiency calibration information; on the basis of the current internal oil quantity of the compressor (201), controlling the compressor (201) to execute an oil recovery operation.

Description

Air conditioning control method and related equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310721045.7, filed on June 16, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to an air conditioning control method and related equipment. Background Art

[0004] In a multi-split air conditioner with multiple indoor units connected to a single outdoor unit, oil may accumulate in the indoor units or piping after a certain period of operation, depending on operating conditions, leading to oil starvation in the compressor. Oil recovery is performed to recover oil from the indoor units and piping. This oil recovery operation occurs when the compressor has been running for a set period of time. With current methods, oil recovery is performed even when the compressor has sufficient oil. This oil recovery operation is performed at a higher compressor speed, leading to problems such as increased indoor temperature fluctuations, decreased indoor comfort, and increased power consumption.

[0005] Summary of the Invention

[0006] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] According to the first aspect of the present disclosure, an air conditioning control method is provided, including: obtaining current operating condition information of the compressor, wherein the above-mentioned current operating condition information includes current working pressure information and current speed information; obtaining the current internal oil amount of the compressor according to the above-mentioned current operating condition information and preset calibration information, wherein the above-mentioned preset calibration information includes refrigerant circulation amount calibration information, oil circulation rate calibration information and oil separation efficiency calibration information; and controlling the above-mentioned compressor to perform an oil recovery operation based on the above-mentioned current internal oil amount of the above-mentioned compressor.

[0008] According to the second aspect of the present disclosure, an air-conditioning control device is provided, including: a first acquisition unit, used to obtain the current operating condition information of the compressor, wherein the above-mentioned current operating condition information includes current working pressure information and current speed information; a second acquisition unit, used to obtain the current internal oil amount of the compressor based on the above-mentioned current operating condition information and preset calibration information, wherein the above-mentioned preset calibration information includes refrigerant circulation amount calibration information, oil circulation rate calibration information and oil separation efficiency calibration information; and a control unit, used to control the above-mentioned compressor to perform an oil recovery operation based on the above-mentioned current internal oil amount of the above-mentioned compressor.

[0009] According to the third aspect of the present disclosure, an air-conditioning control device is provided, comprising: a memory, a processor, and a computer program stored in the above-mentioned memory and executable on the above-mentioned processor, wherein the above-mentioned processor is configured to implement the steps of the air-conditioning control method of any one of the above-mentioned first aspects when executing the computer program stored in the memory.

[0010] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the air-conditioning control method of any one of the above items in the first aspect is implemented.

[0011] According to a fifth aspect of the present disclosure, an air-conditioning system is provided, comprising the air-conditioning control device according to the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 shows a flow chart of an air conditioning control method according to some embodiments of the present disclosure;

[0013] FIG2 is a schematic diagram showing the relationship between the compressor speed and the oil circulation rate in the air conditioning control method according to some embodiments of the present disclosure;

[0014] FIG3 is a schematic diagram showing the relationship between the high-pressure refrigerant circulation volume and the oil separation efficiency in the air conditioning control method according to some embodiments of the present disclosure;

[0015] FIG4 shows a schematic diagram of an application scenario of an air conditioning control method according to some embodiments of the present disclosure;

[0016] FIG5 shows a schematic diagram of another application scenario of the air conditioning control method according to some embodiments of the present disclosure;

[0017] FIG6 shows a schematic structural diagram of an air conditioning control device according to some embodiments of the present disclosure;

[0018] FIG7 shows a schematic structural diagram of an air conditioning control device according to some embodiments of the present disclosure; and

[0019] FIG8 shows a schematic structural diagram of an air conditioning system according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solutions, the present disclosure provides a detailed description of the technical solutions of the embodiments of the present disclosure through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present disclosure, rather than limitations on the technical solutions of the present disclosure. In the absence of conflict, the embodiments of the present disclosure and the technical features in the embodiments can be combined with each other.

[0021] Please refer to FIG1 , which is a flowchart of an air-conditioning control method provided by an embodiment of the present disclosure, which may specifically include steps S110 to S130 .

[0022] In step S110, the current operating condition information of the compressor is acquired, wherein the current operating condition information includes current working pressure information and current speed information.

[0023] In some embodiments, current operating condition information of the compressor is obtained by placing sensors at corresponding locations or by using the relationship between other parameters. The current operating condition information includes current operating pressure information in the pipeline connected to the compressor and current speed information of the compressor motor.

[0024] In step S120, the current internal oil amount of the compressor is obtained according to the above current operating condition information and preset calibration information, wherein the above preset calibration information includes refrigerant circulation amount calibration information, oil circulation rate calibration information and oil separation efficiency calibration information.

[0025] In some embodiments, the preset calibration information is obtained during the test and debugging phase of the air-conditioning system at the factory based on the operating data of the compressor and the calibration test according to the current operating conditions. The preset calibration information may include a mapping relationship between the refrigerant circulation volume and the operating conditions, i.e., refrigerant circulation volume calibration information; the preset calibration information may also include a mapping relationship between the oil circulation rate and the operating conditions, i.e., oil circulation rate calibration information, where the oil circulation rate is the ratio between the amount of hydraulic oil involved in the circulation (the flow rate discharged by the compressor) and the total compressed oil volume of the compressor; the preset calibration information may also include oil separation efficiency calibration information, where the oil separation efficiency is the ratio between the amount of oil that does not enter the oil return capillary after separation by the oil separator and the amount of hydraulic oil involved in the circulation.

[0026] According to the above-mentioned current operating condition information and preset calibration information, the amount of oil in the compressor external circulation pipeline can be calculated, and the current internal oil amount of the compressor can be obtained by subtracting the amount of oil in the compressor external circulation pipeline from the theoretical oil amount of the compressor. It can be understood that the preset calibration information can be stored in a storage unit in the air-conditioning system, and the calibration information stored in the storage unit can be directly retrieved during the air-conditioning control process. When calculating the current internal oil amount, one or more mapping relationships in the preset calibration information can be queried based on the current operating condition information, and the current internal oil amount can be calculated based on the query results. It should be noted that the preset calibration information can be stored in the form of a table. Considering that the preset calibration information cannot cover all data, when determining the data corresponding to the current operating condition information by table lookup, for the data not covered, the table can be looked up by interpolation.

[0027] In step S130 , the compressor is controlled to perform an oil recovery operation based on the current amount of oil in the compressor.

[0028] In some embodiments, whether the compressor performs an oil recovery operation is controlled based on the current internal oil level of the compressor. For example, the internal oil level is compared with a preset threshold, and whether the oil recovery operation is performed is determined based on the comparison result. It is understood that different preset thresholds can be set for different types of air conditioning systems, or different preset thresholds can be set for different operating modes of the same air conditioning system. Whether the oil recovery operation is performed is determined based on the relationship between the current internal oil level and the preset threshold, thereby ensuring that there is sufficient compressed oil in the compressor to maintain the operating efficiency of the compressor, thereby maintaining the heat exchange efficiency of the air conditioning system.

[0029] The present disclosure accurately calculates the current internal oil amount retained in the compressor and determines whether to perform the oil recovery operation based on the current internal oil amount. Compared with the method of performing the oil recovery operation according to a fixed time period, the present disclosure can avoid the occurrence of the oil recovery operation when the fixed time period is exceeded but there is still sufficient compressor oil in the compressor, suppresses unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving indoor temperature comfort, and avoiding additional power consumption caused by frequent oil recovery operations.

[0030] In summary, the air-conditioning control method proposed in the embodiment of the present disclosure calculates the current internal oil amount retained in the compressor through the current operating condition information of the compressor, and determines whether to perform the oil recovery operation based on the current internal oil amount, thereby suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of the indoor temperature, and achieving the purpose of energy saving.

[0031] In some embodiments, the above-mentioned refrigerant circulation volume calibration information is a mapping relationship between working pressure information, compressor speed information, preset capacity information and refrigerant circulation volume; the above-mentioned oil circulation rate calibration information is a mapping relationship between the above-mentioned compressor speed information and the oil circulation rate; and the above-mentioned oil separation efficiency calibration information is a mapping relationship between high-pressure refrigerant circulation volume and oil separation efficiency.

[0032] In some embodiments, the preset calibration information is obtained during the test and debugging phase of the air-conditioning system at the factory based on the operating data of the compressor and the calibration test according to the current working conditions. The preset calibration information may include a mapping relationship between the refrigerant circulation volume and the working conditions, i.e., refrigerant circulation volume calibration information; the preset calibration information may also include a mapping relationship between the oil circulation rate and the working conditions, i.e., oil circulation rate calibration information, where the oil circulation rate is the ratio between the amount of hydraulic oil involved in the circulation (the flow rate discharged by the compressor) and the total compressed oil volume of the compressor; the preset calibration information may also include oil separation efficiency calibration information, where the oil separation efficiency is the ratio between the amount of oil that does not enter the oil return capillary after separation by the oil separator and the amount of hydraulic oil involved in the circulation.

[0033] The calibration information of the refrigerant circulation volume, the calibration information of the oil separation efficiency and the calibration information of the oil circulation rate can be carried out through the control variable test method. For example, the refrigerant circulation volume under different working conditions and preset capacity conditions can be obtained by controlling any one or more of the working pressure information, the compressor speed information and the preset capacity information, and the mapping relationship between them is determined as the refrigerant circulation volume calibration information. The oil circulation rate calibration information can be the correspondence between the different speed information and the oil circulation rate obtained by controlling the speed information. The oil separation efficiency calibration information is the relationship between the high-pressure refrigerant circulation volume and the oil separation efficiency. It should be noted that in an air-conditioning system including an enthalpy injection compressor, in the normal working mode (that is, when the steam injection enthalpy increase function is not turned on), the first working pressure is equal to the high-pressure refrigerant circulation volume; in the steam injection enthalpy increase mode, the sum of the first working pressure and the second working pressure is equal to the high-pressure refrigerant circulation volume. Among them, the first working pressure information is the low pressure before entering the vapor-liquid separator, and the second working pressure information is determined by the inlet temperature and outlet temperature of the second heat exchanger.

[0034] In some embodiments, the step of obtaining the current internal oil amount of the compressor according to the current operating condition information and the preset calibration information includes:

[0035] Obtaining the current high-pressure refrigerant circulation volume according to the current working pressure information, the current speed information, and the refrigerant circulation volume calibration information;

[0036] Obtaining the current oil circulation efficiency through the current speed information and the oil circulation rate calibration information;

[0037] Obtaining the current oil discharge volume of the compressor using the current high-pressure refrigerant circulation volume and the current oil circulation efficiency;

[0038] Obtaining a current oil separation efficiency based on the current high-pressure refrigerant circulation volume and the oil separation efficiency calibration information;

[0039] Obtaining a current oil discharge amount of the oil separator according to the current oil discharge amount of the compressor and the current oil separation efficiency; and

[0040] The current internal oil volume of the compressor is obtained based on the preset capacity information and the current oil discharge volume of the oil separator.

[0041] In some embodiments, different compressors correspond to different preset capacity information. Based on the current operating pressure information, current speed information, and the preset capacity information of the compressor, the current high-pressure refrigerant circulation volume can be obtained by querying the refrigerant calibration information. As shown in Figure 2, a schematic diagram of the relationship between compressor speed and oil circulation rate, provided in an embodiment of the present disclosure, is shown, i.e., a relationship graph corresponding to the oil circulation rate calibration information. The horizontal axis represents the compressor speed in Hz, and the vertical axis represents the oil circulation rate (OCR) in %.

[0042] The current oil circulation efficiency is obtained by querying the oil circulation rate calibration information based on the current speed information. The product of the current high-pressure refrigerant circulation volume and the current oil circulation efficiency is used as the current oil discharge volume of the compressor, that is, the amount of oil entering the oil separator.

[0043] As shown in Figure 3, it is a schematic diagram of the relationship between the high-pressure refrigerant circulation volume and the oil separation efficiency provided in an embodiment of the present disclosure, that is, a relationship graph corresponding to the oil separation efficiency calibration information, wherein the horizontal axis is the compressor speed high-pressure refrigerant circulation volume, in kg / h, and the vertical axis is the oil separation efficiency, in %.

[0044] The current oil separation efficiency is calculated by looking up the oil separation efficiency calibration information in a table and performing a differential calculation based on the current high-pressure refrigerant circulation volume. The oil separation efficiency can be expressed as the ratio of the amount of oil remaining in the oil return capillary after the oil separator separates the refrigerant gas to the amount of hydraulic oil in circulation.

[0045] The current oil discharge volume of the oil separator is calculated as the product of the compressor's current oil discharge volume and the current oil separation efficiency. It should be noted that the preset capacity information represents the total amount of compressed oil in the air conditioning system. The current internal flow rate within the compressor is calculated by subtracting the current oil discharge volume of the oil separator from the preset capacity information.

[0046] In summary, the method proposed in the embodiment of the present disclosure can indirectly obtain the current internal oil amount by querying the preset calibration information based on the current operating condition information, so as to accurately control the timing of the oil recovery operation according to the current internal oil amount. Compared with the method of performing the oil recovery operation according to a fixed time, it can avoid the phenomenon of performing the oil recovery operation when the fixed time is exceeded but there is still sufficient compressor oil in the compressor, thereby suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of the indoor temperature, and avoiding additional power consumption caused by frequent oil recovery operations.

[0047] In some embodiments, the compressor includes an injection enthalpy compressor, the current working pressure information includes current first working pressure information and current second working pressure information, the current first working pressure information is less than the second working pressure information, and the refrigerant circulation volume calibration information includes low-pressure refrigerant circulation volume calibration information and medium-pressure refrigerant circulation volume calibration information.

[0048] Obtaining the current high-pressure refrigerant circulation volume according to the current working pressure information, the current speed information, and the refrigerant circulation volume calibration information includes:

[0049] Get the working mode of the above air conditioner;

[0050] When the working mode is a normal working mode, obtaining a first low-pressure refrigerant circulation volume according to the first working pressure information, the current speed information and the low-pressure refrigerant circulation volume calibration information; and

[0051] The first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

[0052] In some embodiments, the air conditioning control method of the embodiment of the present disclosure can be used in an air conditioning system including an injection enthalpy compressor. FIG4 is a schematic diagram of an application scenario of the air conditioning control method provided by the embodiment of the present disclosure, i.e., a scenario in which the air conditioning operating mode is the normal operating mode (non-injection enthalpy increase mode). The corresponding operating principle is as follows: a low-pressure gas refrigerant is sucked into the compressor 201 and compressed into a high-pressure gas refrigerant. This high-pressure gas refrigerant also contains mist-like compressor oil. Then, the high-pressure gas refrigerant is separated into high-pressure gas refrigerant and compressor oil in the oil separator 202. The separated compressor oil returns to the inlet pipe of the compressor through the oil return capillary 203, and the unseparated oil enters the circulation loop at the rear end of the oil separator. The high-pressure gas refrigerant is sent to the first heat exchanger 205 through the four-way switching valve 204, undergoes heat exchange with the outdoor air provided by the outdoor fan 206, and is condensed into a high-pressure liquid refrigerant. Then, the high-pressure liquid refrigerant is sent to the indoor unit through the second heat exchanger 207 and the liquid-side connecting pipe, and is reduced in pressure by the first electronic expansion valve 211 to become a low-pressure gas-liquid two-phase refrigerant and sent to the indoor heat exchanger 208. In the indoor heat exchanger 208, it exchanges heat with the indoor air and evaporates to become a low-pressure gas refrigerant. The low-pressure gas refrigerant flows into the gas-liquid separator 210 through the gas-side connecting pipe and the four-way switching valve 204. The low-pressure gas refrigerant passing through the gas-liquid separator is combined with the compressor oil separated in the oil separator and returned to the compressor. It should be noted that the low-pressure pressure sensor 209 can be used to measure the current low-pressure pressure information (i.e., the first pressure information).

[0053] When the working mode is the normal working mode, the first low-pressure refrigerant circulation amount is calculated according to the first working pressure information, the current speed information and the low-pressure refrigerant circulation amount calibration information.

[0054] It is understood that the low-pressure refrigerant circulation calibration information is a mapping between the first operating pressure information, the current speed information, and the preset capacity information, and is obtained through calibration testing. Under normal operating mode, the first low-pressure refrigerant circulation volume is equal to the refrigerant volume of the high-pressure circulation. Therefore, the first low-pressure refrigerant circulation volume is determined to be the first high-pressure refrigerant circulation volume.

[0055] In summary, in the normal operating mode of an air-conditioning system including a spray enthalpy compressor, the high-pressure refrigerant circulation volume is calculated using the first low-pressure refrigerant circulation volume, and the current oil circulation efficiency is obtained based on the high-pressure refrigerant circulation volume and oil circulation rate calibration information. Based on the current oil circulation efficiency, the current oil discharge volume of the compressor is obtained, and then the current internal oil volume is calculated. The timing of the oil recovery operation is precisely controlled based on the current internal oil volume. Compared to the method of performing the oil recovery operation for a fixed duration, this method can avoid the occurrence of the oil recovery operation when the fixed duration has been exceeded but there is still sufficient compressor oil in the compressor. This suppresses unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving indoor temperature comfort, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0056] In some embodiments, the above method further comprises:

[0057] When the working mode is the steam injection enthalpy increase working mode, the second low-pressure refrigerant circulation volume is obtained according to the current first working pressure information, the current speed information and the low-pressure refrigerant circulation volume calibration information;

[0058] The current medium-pressure refrigerant circulation volume is obtained according to the current second working pressure information, the current speed information and the medium-pressure refrigerant circulation volume calibration information; and

[0059] The second high-pressure refrigerant circulation volume is determined according to the second low-pressure refrigerant circulation volume and the medium-pressure refrigerant circulation volume.

[0060] In some embodiments, FIG5 is a schematic diagram of another application scenario of the air conditioning control method provided by the embodiment of the present disclosure, namely, a scenario in which the air conditioning operating mode is a non-steam injection enthalpy increase mode. The corresponding working principle is as follows: the low-pressure gas refrigerant is sucked into the compressor 201 and compressed. During the compression process, it merges with the medium-pressure gas refrigerant to form a high-pressure gas refrigerant. This high-pressure gas refrigerant also contains mist-like compressor oil. Then, the high-pressure gas refrigerant is separated into high-pressure gas refrigerant and compressor oil in the oil separator 202. The separated compressor oil returns to the inlet pipe of the compressor through the oil return capillary 203, and the unseparated oil enters the circulation loop at the rear end of the oil separator. The high-pressure gas refrigerant is sent to the first heat exchanger 205 through the four-way switching valve 204, undergoes heat exchange with the outdoor air provided by the outdoor fan 206, and is condensed into a high-pressure liquid refrigerant. A portion of the high-pressure liquid refrigerant flows to the second electronic expansion valve 212, while the remainder is delivered to the indoor unit via the second heat exchanger 207 and the liquid-side connecting pipe. It is then reduced in pressure by the first electronic expansion valve 211, becoming low-pressure gas-liquid two-phase refrigerant and delivered to the indoor heat exchanger 208. In the indoor heat exchanger 208, it exchanges heat with the indoor air and evaporates to become low-pressure gas refrigerant. The low-pressure gas refrigerant then flows into the gas-liquid separator via the gas-side connecting pipe and the four-way switching valve 204. The low-pressure gas refrigerant passing through the gas-liquid separator 210 is combined with the compressor oil separated in the oil separator 202 and returned to the compressor. The high-pressure liquid refrigerant flowing to the second electronic expansion valve 212 is reduced in pressure by the second electronic expansion valve 212 to become medium-pressure gas-liquid two-phase refrigerant. It then exchanges heat with the high-pressure liquid refrigerant in the second heat exchanger 207, evaporates to become medium-pressure gas refrigerant, and returns to the compressor.

[0061] When the operating mode is steam injection enthalpy increase mode, the first low-pressure refrigerant circulation volume is calculated based on the current first operating pressure information, current speed information, and low-pressure refrigerant circulation volume calibration information. The current intermediate-pressure refrigerant circulation volume is obtained based on the current second operating pressure information, current speed information, and intermediate-pressure refrigerant circulation volume calibration information.

[0062] It is understood that the low-pressure refrigerant circulation calibration information is a mapping relationship between the first operating pressure information, current speed information, and preset capacity information, and is obtained through calibration testing. The medium-pressure refrigerant circulation calibration information is a mapping relationship between the second operating pressure information, current speed information, and preset capacity information, and is also obtained through calibration testing. In the steam injection enthalpy increase operating mode, the second high-pressure refrigerant circulation volume includes not only the second low-pressure refrigerant circulation volume but also the medium-pressure refrigerant circulation volume.

[0063] In an air-conditioning system with an injection compressor operating in an increased steam injection mode, the high-pressure refrigerant circulation volume is calculated using the first low-pressure refrigerant circulation volume and the second refrigerant circulation volume, and the current oil circulation efficiency is obtained based on the high-pressure refrigerant circulation volume and oil circulation rate calibration information. Based on the current oil circulation efficiency, the current oil discharge volume of the compressor is obtained, and the current internal oil volume is then calculated. The timing of the oil recovery operation is precisely controlled based on the current internal oil volume. Compared to a method of performing an oil recovery operation for a fixed duration, this method can avoid performing an oil recovery operation even when the fixed duration has expired but there is still sufficient compressor oil in the compressor, thereby suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving indoor temperature comfort, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0064] In some embodiments, as shown in Figure 4 or Figure 5, the first working pressure can be obtained by the low-pressure pressure sensor 209 at the inlet of the gas-liquid separator 210. When determining the second pressure information, the inlet temperature and outlet temperature of the second heat exchanger can be first obtained, the difference between the inlet temperature and the outlet temperature can be calculated, and the corresponding second pressure information can be obtained by querying the preset relationship between the temperature difference and the second pressure information.

[0065] In some embodiments, controlling the compressor to perform an oil recovery operation based on the current internal oil level of the compressor includes:

[0066] When the current internal oil amount of the compressor is less than a preset oil amount, the compressor is controlled to perform an oil recovery operation.

[0067] In some embodiments, when the current internal oil level of the compressor is less than a preset level, i.e., the oil level is low, which could affect the compressor's normal compression and pressurization functions, the compressor is controlled to initiate an oil recovery operation to ensure sufficient oil to maintain compressor operating efficiency, thereby ensuring the heat exchange efficiency of the air conditioner. Determining whether to perform an oil recovery operation based on the current internal oil level can avoid executing an oil recovery operation even when sufficient oil remains in the compressor after a fixed time has expired. This prevents unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving indoor temperature comfort, and avoiding the additional power consumption associated with frequent oil recovery operations.

[0068] In some embodiments, the above method further comprises:

[0069] When the time interval of the last oil recovery operation exceeds the preset time length, the compressor is controlled to perform the oil recovery operation again.

[0070] In some embodiments, to prevent certain sensors from malfunctioning or losing accuracy under certain operating conditions, a function can be configured to determine whether to execute an oil recovery operation based on a time interval and a preset duration, thereby effectively ensuring sufficient oil in the compressor. It is understood that the preset duration should be greater than the maximum interval for executing an oil recovery operation based on the remaining oil in the compressor, as determined through experimental calibration. This prevents the compressor from executing an oil recovery operation based on the time interval parameter even when there is actually sufficient oil in the compressor, thereby suppressing unnecessary oil recovery operations, thereby preventing indoor temperature fluctuations, improving indoor temperature comfort, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0071] Referring to FIG6 , an air conditioning control device 500 provided in an embodiment of the present disclosure may include:

[0072] The first acquiring unit 501 is configured to acquire current operating condition information of the compressor, wherein the current operating condition information includes current operating pressure information and current speed information;

[0073] A second acquiring unit 502 is configured to acquire a current amount of oil in the compressor based on the current operating condition information and preset calibration information, wherein the preset calibration information includes refrigerant circulation amount calibration information, oil circulation rate calibration information, and oil separation efficiency calibration information; and

[0074] The control unit 503 is configured to control the compressor to perform an oil recovery operation based on the current amount of oil in the compressor.

[0075] As shown in Figure 7, an embodiment of the present disclosure also provides an air conditioning control device 600, which may include a memory 610, a processor 620, and a computer program 611 stored on the memory 610 and executable on the processor. When the processor 620 executes the computer program 611, the steps of the above-mentioned air conditioning control method are implemented.

[0076] Since the air-conditioning control device introduced in this embodiment is a device used to implement an air-conditioning control device in the content of this disclosure, based on the method introduced in the embodiment of this disclosure, technical personnel in this field can understand the specific implementation of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of this disclosure will not be introduced in detail here. As long as the equipment used by technical personnel in this field to implement the method in the embodiment of this disclosure falls within the scope of protection to be protected by this disclosure.

[0077] During specific implementation, the computer program 611 can implement any implementation method in the embodiment corresponding to FIG. 1 when executed by a processor.

[0078] As shown in FIG8 , the embodiment of the present disclosure further provides an air-conditioning system 700 , including the air-conditioning control device 600 shown in FIG8 .

[0079] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0080] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0081] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0082] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0083] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0084] An embodiment of the present disclosure further provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of the air conditioning control method.

[0085] In the several embodiments provided in the present disclosure, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0086] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0087] The functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0088] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the various embodiments of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program code.

[0089] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. An air conditioning control method, include: Acquiring current operating condition information of the compressor, wherein the current operating condition information includes current working pressure information and current speed information; Acquiring a current amount of oil in the compressor according to the current operating condition information and preset calibration information, wherein the preset calibration information includes calibration information of refrigerant circulation amount, calibration information of oil circulation rate, and calibration information of oil separation efficiency; and The compressor is controlled to perform an oil recovery operation based on a current amount of oil in the compressor.

2. The method according to claim 1, in, The refrigerant circulation volume calibration information is the mapping relationship between the working pressure information, the compressor speed information, the preset capacity information and the refrigerant circulation volume; the oil circulation rate calibration information is the mapping relationship between the compressor speed information and the oil circulation rate; and the oil separation efficiency calibration information is the mapping relationship between the high-pressure refrigerant circulation volume and the oil separation efficiency.

3. The method according to claim 1, in, The obtaining the current internal oil amount of the compressor according to the current operating condition information and the preset calibration information includes: Acquire the current high-pressure refrigerant circulation volume according to the current working pressure information, the current speed information and the refrigerant circulation volume calibration information; Obtaining the current oil circulation efficiency through the current rotation speed information and the oil circulation rate calibration information; Obtaining a current oil discharge amount of the compressor using the current high-pressure refrigerant circulation amount and the current oil circulation efficiency; Acquiring a current oil separation efficiency according to the current high-pressure refrigerant circulation volume and the oil separation efficiency calibration information; Obtaining a current oil discharge amount of the oil separator according to a current oil discharge amount of the compressor and the current oil separation efficiency; and The current internal oil volume of the compressor is obtained according to the preset capacity information and the current oil discharge volume of the oil separator.

4. The method according to claim 3, in, The compressor includes an injection enthalpy compressor, the current working pressure information includes current first working pressure information and current second working pressure information, the current first working pressure information is less than the second working pressure information, the refrigerant circulation amount calibration information includes low-pressure refrigerant circulation amount calibration information and medium-pressure refrigerant circulation amount calibration information, The obtaining of the current high-pressure refrigerant circulation amount according to the current working pressure information, the current speed information and the refrigerant circulation amount calibration information includes: Obtaining the working mode of the air conditioner; When the working mode is a normal working mode, obtaining a first low-pressure refrigerant circulation amount according to the first working pressure information, the current speed information and the low-pressure refrigerant circulation amount calibration information; and The first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

5. The method according to claim 4, further comprising: include: When the working mode is the steam injection enthalpy increase working mode, the second low-pressure refrigerant circulation amount is obtained according to the current first working pressure information, the current speed information and the low-pressure refrigerant circulation amount calibration information; The current medium-pressure refrigerant circulation amount is obtained according to the current second working pressure information, the current speed information and the medium-pressure refrigerant circulation amount calibration information; as well as The second high-pressure refrigerant circulation amount is determined according to the second low-pressure refrigerant circulation amount and the medium-pressure refrigerant circulation amount.

6. The method according to claim 4 or 5, in, The first working pressure information is the low pressure before entering the vapor-liquid separator, and the second working pressure information is determined by the inlet temperature and outlet temperature of the second heat exchanger.

7. The method according to claim 1, in, The step of controlling the compressor to perform an oil recovery operation based on the current internal oil amount of the compressor comprises: When the current amount of oil in the compressor is less than a preset amount of oil, the compressor is controlled to perform an oil recovery operation.

8. The method according to claim 1, further comprising: include: When the time interval of the last oil recovery operation exceeds the preset time length, the compressor is controlled to perform the oil recovery operation again.

9. An air conditioning control device, include: A first acquisition unit, configured to acquire current operating condition information of the compressor, wherein the current operating condition information includes current working pressure information and current speed information; a second acquisition unit, configured to acquire a current internal oil amount of the compressor according to the current operating condition information and preset calibration information, wherein the preset calibration information includes refrigerant circulation amount calibration information, oil circulation rate calibration information, and oil separation efficiency calibration information; and The control unit is used to control the compressor to perform an oil recovery operation based on the current internal oil amount of the compressor.

10. An air conditioning control device, include: A memory and a processor, wherein the processor is used to implement the steps of the air conditioning control method as described in any one of claims 1 to 9 when executing the computer program stored in the memory.

11. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the air conditioning control method according to any one of claims 1 to 9.

12. An air conditioning system, comprising the air conditioning control device according to claim 13.

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