Air conditioner control method and related equipment

Abstract

The embodiment of the invention discloses an air conditioner control method and related equipment. The method comprises the steps that current working condition information of a compressor is obtained, and the current working condition information comprises current working pressure information and current rotating speed information; the current internal oil quantity of the compressor is obtained according to the current working condition information and preset calibration information, and the preset calibration information comprises refrigerant circulation quantity calibration information, oil circulation rate calibration information and oil separation efficiency calibration information; and controlling the compressor to execute oil recovery operation based on the current internal oil quantity of the compressor.

Description

Technical Field

[0001] The present specification relates to the field of air conditioning control, and more specifically, embodiments of the present application relate to an air conditioning control method and related equipment. Background Art

[0002] In a multi-type air conditioner in which multiple indoor units are connected to one outdoor unit, when the unit runs for a certain period of time, oil may accumulate in the indoor unit or the pipe depending on the operating conditions, causing the compressor to be short of oil. An oil recovery operation is performed to recover the oil in the indoor unit and the pipe. This oil recovery operation is performed when the compressor has been running for a set time. In the current method, when the compressor has been running for a set time, the oil recovery operation is performed even if there is enough oil in the compressor. This oil return operation is performed at a higher compressor speed, which will lead to problems such as increased indoor temperature fluctuations, deterioration of indoor comfort and increased power consumption. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides an air conditioning control method.

[0005] A second aspect of the present invention provides an air conditioning control device.

[0006] A third aspect of the present invention provides an air conditioning control device.

[0007] A fourth aspect of the present invention provides a computer-readable storage medium.

[0008] A fifth aspect of the present invention provides an air conditioning system.

[0009] In view of this, according to a first aspect of an embodiment of the present application, an air conditioning control method is proposed, the method comprising:

[0010] Acquire current working condition information of the compressor, wherein the current working condition information includes current working pressure information and current speed information;

[0011] Acquiring the current internal oil volume of the compressor according to the current working condition information and preset calibration information, wherein the preset calibration information includes refrigerant circulation volume calibration information, oil circulation rate calibration information and oil separation efficiency calibration information;

[0012] The compressor is controlled to perform an oil recovery operation based on a current amount of oil in the compressor.

[0013] In a feasible implementation manner, 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.

[0014] In a feasible implementation manner, the method of obtaining the current internal oil amount of the compressor according to the current operating condition information and the preset calibration information includes:

[0015] 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;

[0016] Obtaining the current oil circulation efficiency through the current speed information and the oil circulation rate calibration information;

[0017] The current oil discharge amount of the compressor is obtained by using the current high-pressure refrigerant circulation amount and the current oil circulation efficiency;

[0018] Obtaining the current oil separation efficiency according to the current high-pressure refrigerant circulation volume and the oil separation efficiency calibration information;

[0019] Obtaining the current oil discharge amount of the oil separator according to the current oil discharge amount of the compressor and the current oil separation efficiency;

[0020] 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.

[0021] In a feasible implementation manner, 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.

[0022] 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:

[0023] Get the working mode of the air conditioner;

[0024] When the working mode is a normal working mode, obtaining the 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;

[0025] The first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

[0026] In a feasible implementation manner, the above method further includes:

[0027] In the case where 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;

[0028] The current medium-pressure refrigerant circulation volume is obtained according to the current second working pressure information, the current rotation speed information and the medium-pressure refrigerant circulation volume calibration information;

[0029] 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.

[0030] In a feasible implementation manner, 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.

[0031] In a feasible implementation manner, the above-mentioned controlling the compressor to perform the oil recovery operation based on the current internal oil amount of the compressor includes:

[0032] When the current internal oil amount of the compressor is less than the preset oil amount, the compressor is controlled to perform an oil recovery operation.

[0033] In a feasible implementation manner, the above method further includes:

[0034] 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.

[0035] According to a second aspect of an embodiment of the present application, an air conditioning control device is provided, comprising:

[0036] 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;

[0037] A second acquisition unit is used to acquire the current internal oil amount of the compressor according to the current working 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;

[0038] 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.

[0039] According to the third aspect of an embodiment of the present application, an air-conditioning control device is proposed, 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 used to implement the steps of the air-conditioning control method as described in any one of the above-mentioned first aspects when executing the computer program stored in the memory.

[0040] According to a fourth aspect of an embodiment of the present application, 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 of the first aspect is implemented.

[0041] According to a fifth aspect of an embodiment of the present application, an air-conditioning system is proposed, comprising the air-conditioning control device described in the third aspect.

[0042] Compared with the prior art, the present invention includes at least the following beneficial effects: the method proposed in the present application includes: obtaining the current operating condition information of the compressor, wherein the current operating condition information includes the current working pressure information and the current speed information; obtaining the current internal oil volume of the compressor according to the current operating condition information and the preset calibration information, wherein the preset calibration information includes the refrigerant circulation volume calibration information, the oil circulation rate calibration information and the oil separation efficiency calibration information; controlling the compressor to perform the oil recovery operation based on the current internal oil volume of the compressor. The air conditioning control method proposed in the embodiment of the present application calculates the current internal oil volume retained in the compressor through the current operating condition information of the compressor, determines whether to perform the oil recovery operation according to the current internal oil volume, suppresses unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of the indoor temperature, and achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A schematic diagram of a flow chart of an air conditioning control method provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the relationship between a compressor speed and an oil circulation rate provided in an embodiment of the present application;

[0046] Figure 3 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 application;

[0047] Figure 4A schematic diagram of an application scenario of an air conditioning control method provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of an application scenario of another air conditioning control method provided in an embodiment of the present application;

[0049] Figure 6 A schematic diagram of the structure of an air conditioning control device provided in an embodiment of the present application;

[0050] Figure 7 A schematic diagram of the structure of an air conditioning control device provided in an embodiment of the present application;

[0051] Figure 8 A schematic diagram of the structure of an air conditioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0053] See also Figure 1 , is a flow chart of an air conditioning control method provided in an embodiment of the present application, which may specifically include:

[0054] S110, obtaining current operating condition information of the compressor, wherein the current operating condition information includes current working pressure information and current speed information;

[0055] Exemplarily, by setting sensors at corresponding positions or through the relationship between other parameters, the current operating condition information of the compressor is obtained, and the current operating condition information includes the current working pressure information in the pipeline connected to the compressor and the current speed information of the compressor motor.

[0056] S120, obtaining the current internal oil amount of the compressor according to the current working 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;

[0057] Exemplarily, the preset calibration information is obtained by performing calibration tests based on the operating data of the compressor and the current working conditions during the test and debugging stage of the air-conditioning system in the factory. The preset calibration information may include the mapping relationship between the refrigerant circulation volume and the working conditions, and the refrigerant circulation volume calibration information; the preset calibration information may also include the mapping relationship between the oil circulation rate and the working conditions, that is, the oil circulation rate calibration information, and 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 also includes the oil separation efficiency calibration information, and the oil separation efficiency is the ratio between the amount of oil that does not enter the return oil capillary after separation by the oil separator and the amount of hydraulic oil involved in the circulation. According to the above current working condition information and the preset calibration information, the amount of oil in the compressor external circulation pipeline can be calculated, and the current internal oil volume of the compressor can be obtained by subtracting the amount of oil in the compressor external circulation pipeline from the theoretical oil volume of the compressor. It is understandable that the preset calibration information can be stored in a storage unit in the air-conditioning system. During the air-conditioning control process, the current internal oil volume corresponding to the current operating condition information can be obtained by retrieving the calibration information stored in the storage unit and combining it with the current operating condition information to perform a table lookup difference calculation.

[0058] S130: Controlling the compressor to perform an oil recovery operation based on the current internal oil amount of the compressor.

[0059] Exemplarily, whether the compressor performs an oil recovery operation is controlled according to the current internal oil volume of the compressor. Different preset thresholds can be set for different types of air-conditioning systems, or different preset thresholds can be set for the same air-conditioning according to different working modes. Whether the oil recovery operation is performed is controlled according to the relationship between the current internal oil volume and the preset value, thereby ensuring that there is enough compressed oil in the compressor to ensure the working efficiency of the compressor, thereby ensuring the heat exchange efficiency of the air-conditioning. The present application accurately calculates the current internal oil volume retained in the compressor, and determines whether to perform an oil recovery operation according to the current internal oil volume. Compared with the method of performing the oil recovery operation by a fixed time, the phenomenon of performing the oil recovery operation when the fixed time is exceeded but there is still enough compressor oil in the compressor can be avoided, 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.

[0060] In summary, the air conditioning control method proposed in the embodiment of the present application 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 indoor temperature, and achieving the purpose of energy saving.

[0061] In some examples, the refrigerant circulation volume calibration information is a mapping relationship between working pressure information, compressor speed information, preset capacity information and refrigerant circulation volume, the oil circulation rate calibration information is a mapping relationship between the compressor speed information and the oil circulation rate, and the oil separation efficiency calibration information is a mapping relationship between high-pressure refrigerant circulation volume and oil separation efficiency.

[0062] Exemplarily, the preset calibration information is obtained during the test and debugging phase of the air-conditioning system in the factory based on the operating data of the compressor and the calibration test based on the current operating conditions. The preset calibration information may include a mapping relationship between the refrigerant circulation volume and the operating conditions, and refrigerant circulation volume calibration information; the preset calibration information may also include a mapping relationship between the oil circulation rate and the operating conditions, that is, the oil circulation rate calibration information, and the oil circulation rate is the ratio of the amount of hydraulic oil participating in the circulation (the flow rate discharged by the compressor) to the total compressed oil volume of the compressor; the preset calibration information also includes oil separation efficiency calibration information, and the oil separation efficiency is the ratio between the amount of oil that has not entered the return oil capillary after separation by the oil separator and the amount of hydraulic oil participating in the circulation.

[0063] 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. Specifically, 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 is the correspondence between 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.

[0064] In some examples, obtaining the current internal oil volume of the compressor according to the current operating condition information and preset calibration information includes:

[0065] 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;

[0066] Obtaining the current oil circulation efficiency through the current speed information and the oil circulation rate calibration information;

[0067] The current oil discharge amount of the compressor is obtained by using the current high-pressure refrigerant circulation amount and the current oil circulation efficiency;

[0068] Obtaining the current oil separation efficiency according to the current high-pressure refrigerant circulation volume and the oil separation efficiency calibration information;

[0069] Obtaining the current oil discharge amount of the oil separator according to the current oil discharge amount of the compressor and the current oil separation efficiency;

[0070] 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.

[0071] For example, different compressors correspond to different preset capacity information. According to the current working pressure information, the current speed information and the preset capacity information of the compressor, the current high-pressure refrigerant circulation volume can be obtained by performing a table lookup and differential calculation on the refrigerant calibration information. Figure 2 As shown, it is a schematic diagram of the relationship between the compressor speed and the oil circulation rate provided in an embodiment of the present application, that is, the relationship graph corresponding to the oil circulation rate calibration information, the horizontal axis is the compressor speed, the unit is Hz, and the vertical axis is the OCR (Oil Circulation Rate) oil circulation rate, the unit is %.

[0072] The current oil circulation efficiency is obtained by looking up the table and performing differential calculation on the oil circulation rate calibration information through 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 oil volume entering the oil separator.

[0073] like Figure 3 As shown, 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 application, that is, a relationship graph corresponding to the oil separation efficiency calibration information, the horizontal axis is the compressor speed high-pressure refrigerant circulation volume, the unit is Kg / h, and the vertical axis is the oil separation efficiency, the unit is %.

[0074] The current oil separation efficiency is obtained by looking up the table difference calculation of the oil separation efficiency calibration information based on the current high-pressure refrigerant circulation volume. The oil separation efficiency can be expressed as the ratio between the amount of oil that does not enter the oil return capillary after the oil separator strips and separates the refrigerant and the amount of hydraulic oil involved in the circulation.

[0075] The product of the current oil discharge volume of the compressor and the current oil separation efficiency is used as the current oil discharge volume of the oil separator. The current oil discharge volume is the amount of oil accumulated in the pipes behind the indoor unit and the oil separator. It should be noted that the preset capacity information is the total amount of compressed oil in the air conditioning system. The current internal flow in the compressor is obtained by subtracting the current oil discharge volume of the oil separator from the preset capacity information.

[0076] In summary, the method proposed in the embodiment of the present application can indirectly obtain the current internal oil amount through table lookup difference calculation based on the current operating condition information and the preset calibration 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.

[0077] In some examples, 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 volume calibration information includes low-pressure refrigerant circulation volume calibration information and medium-pressure refrigerant circulation volume calibration information,

[0078] 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:

[0079] Get the working mode of the air conditioner;

[0080] When the working mode is a normal working mode, obtaining the 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;

[0081] The first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

[0082] Exemplarily, the air conditioning control method of the embodiment of the present application may be used in an air conditioning system including an injection enthalpy compressor. Figure 4A schematic diagram of an application scenario of an air conditioning control method provided in an embodiment of the present application, i.e., a scenario in which the air conditioning working mode is a normal working mode (non-steam injection enthalpy increase mode). The corresponding working principle is: 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, and heat exchanges with the outdoor air provided by the outdoor fan 206, and condenses 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 is sent to the indoor heat exchanger 208. In the indoor heat exchanger 208, the indoor air is heat exchanged and evaporated 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).

[0083] When the working mode is the normal working mode, the first low-pressure refrigerant circulation volume is calculated by table lookup and interpolation through the first working pressure information, the current rotation speed information and the low-pressure refrigerant circulation volume calibration information.

[0084] It is understandable that the low-pressure refrigerant circulation calibration information is a mapping relationship between the first working pressure information, the current speed information and the preset capacity information, which is obtained through a calibration test. In the normal working mode, the first low-pressure refrigerant circulation amount is equal to the refrigerant amount of the high-pressure circulation, and the first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

[0085] In summary, in a normal working mode of an air-conditioning system including an enthalpy spray compressor, the high-pressure refrigerant circulation volume is calculated by the first low-pressure refrigerant circulation volume, and the current oil circulation efficiency is obtained according to the high-pressure refrigerant circulation volume and the oil circulation rate calibration information, and the current oil discharge volume of the compressor is obtained with the current oil circulation efficiency, and then the current internal oil volume is obtained. Therefore, the timing of the oil recovery operation is accurately controlled according to the current internal oil volume. Compared with the method of performing the oil recovery operation by a fixed time, it can avoid the phenomenon of performing the oil recovery operation when the fixed time is exceeded but there is still enough compressor oil in the compressor, suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of the indoor temperature, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0086] In some examples, the method further includes:

[0087] In the case where 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;

[0088] The current medium-pressure refrigerant circulation volume is obtained according to the current second working pressure information, the current rotation speed information and the medium-pressure refrigerant circulation volume calibration information;

[0089] 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.

[0090] For example, Figure 5 A schematic diagram of an application scenario of another air conditioning control method provided for an embodiment of the present application, i.e., a scenario in which the air conditioning working mode is a non-steam injection enthalpy increase mode. The corresponding working principle is: 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, exchanges heat with the outdoor air provided by the outdoor fan 206, and condenses into a high-pressure liquid refrigerant. Part of the high-pressure liquid refrigerant flows to the second electronic expansion valve 212, and the rest 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 is 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 through 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 a medium-pressure gas-liquid two-phase refrigerant, exchanges heat with the high-pressure liquid refrigerant in the second heat exchanger 207, evaporates to become a medium-pressure gas refrigerant and returns to the compressor.

[0091] When the working mode is the steam injection enthalpy working mode, the first low-pressure refrigerant circulation volume is calculated by table lookup interpolation according to the current first working pressure information, the current speed information and the low-pressure refrigerant circulation volume calibration information. 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.

[0092] It is understandable that the low-pressure refrigerant circulation calibration information is a mapping relationship between the first working pressure information, the current speed information and the preset capacity information, which is obtained through a calibration test. The medium-pressure refrigerant circulation calibration information is a mapping relationship between the second working pressure information, the current speed information and the preset capacity information, which is also obtained through a calibration test. In the steam injection enthalpy increase working 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.

[0093] In an air-conditioning system including an injection enthalpy compressor, in an increased steam injection enthalpy working mode, the high-pressure refrigerant circulation volume is calculated by the first low-pressure refrigerant circulation volume and the second refrigerant circulation volume, and the current oil circulation efficiency is obtained according to the high-pressure refrigerant circulation volume and the oil circulation rate calibration information, and the current oil discharge volume of the compressor is obtained with the current oil circulation efficiency, and then the current internal oil volume is obtained. Therefore, the timing of the oil recovery operation is accurately controlled according to the current internal oil volume. Compared with the method of performing the oil recovery operation by a fixed time, the phenomenon of performing the oil recovery operation when the fixed time is exceeded but there is still enough compressor oil in the compressor can be avoided, and unnecessary oil recovery operations are suppressed, thereby avoiding indoor temperature fluctuations, improving the comfort of the indoor temperature, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0094] In some examples, 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.

[0095] For example, Figure 4 or Figure 5 As shown, the first working pressure can be obtained by the low-pressure pressure sensor 209 at the inlet of the vapor-liquid separator 210, and the second pressure information can be obtained by first obtaining the inlet temperature and outlet temperature of the second heat exchanger, and then looking up the table according to the difference between the inlet temperature and the outlet temperature.

[0096] In some examples, controlling the compressor to perform an oil recovery operation based on the current internal oil amount of the compressor includes:

[0097] 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.

[0098] For example, when the current internal oil volume of the compressor is less than the preset oil volume, that is, the oil volume in the compressor is low, which will affect the normal compression and pressurization function of the compressor, the compressor is controlled to start the oil recovery operation to ensure that there is enough compressed oil in the compressor to ensure the working efficiency of the compressor, thereby ensuring the heat exchange efficiency of the air conditioner. By judging whether to perform the oil recovery operation based on the current internal oil volume, it is possible to avoid the phenomenon of performing the oil recovery operation when the fixed time is exceeded but there is still enough compressor oil in the compressor, suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of indoor temperature, and avoiding additional power consumption caused by frequent oil recovery operations.

[0099] In some examples, the method further includes:

[0100] 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.

[0101] For example, in order to avoid the phenomenon that some sensors fail or the accuracy is reduced under certain working conditions, a function of judging the execution of oil recovery operation according to the time interval and the preset time can be set at the same time, which can effectively ensure that there is sufficient oil in the compressor. It is understandable that the preset time should be greater than the longest time interval for executing the oil recovery operation according to the remaining oil in the compressor according to the test calibration, so as to avoid the compressor performing the oil recovery operation according to the time interval parameter when there is actually enough oil in the compressor, suppressing unnecessary oil recovery operations, thereby avoiding indoor temperature fluctuations, improving the comfort of indoor temperature, and avoiding the additional power consumption caused by frequent oil recovery operations.

[0102] See also Figure 6 , an air conditioning control device 500 provided in an embodiment of the present application may include:

[0103] 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;

[0104] A second acquisition unit is used to acquire the current internal oil amount of the compressor according to the current working 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;

[0105] 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.

[0106] like Figure 7As shown, an embodiment of the present application also provides an air conditioning control device 600, which may include a memory 610, a processor 620, and a computer program 611 stored in the memory 610 and executable on the processor. When the processor 620 executes the computer program 611, it implements the steps of any air conditioning control method of the first aspect mentioned above.

[0107] Since the air conditioning control device introduced in this embodiment is a device used to implement a cooking device in the embodiment of the present application, based on the method introduced in the embodiment of the present application, the technical personnel in this field can understand the specific implementation mode of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of the present application is not introduced in detail here. As long as the equipment used by technical personnel in this field to implement the method in the embodiment of the present application falls within the scope of protection of this application.

[0108] In the specific implementation process, when the computer program 611 is executed by the processor, it can achieve Figure 1 Any implementation manner in the corresponding embodiments.

[0109] like Figure 8 As shown, the embodiment of the present application also provides an air conditioning system 700, including Figure 8 An air conditioning control device 600 is shown.

[0110] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0111] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0112] The present application 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 application. 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 generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0113] These computer program instructions may also be stored in a computer-readable memory capable of directing 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 an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0114] 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, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0115] An embodiment of the present application 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.

[0116] In the several embodiments provided in the present application, 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 only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, 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 interfaces, devices or units, which can be electrical, mechanical or other forms.

[0117] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0118] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0119] 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 application 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 to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0120] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioning control method, characterized in that: 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 the current internal oil volume of the compressor according to the current operating condition information and preset calibration information, wherein the preset calibration information includes refrigerant circulation volume calibration information, oil circulation rate calibration information and oil separation efficiency calibration information; 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, characterized in that 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, characterized in that 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; Acquiring 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; 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, characterized in that 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; The first low-pressure refrigerant circulation amount is determined as the first high-pressure refrigerant circulation amount.

5. The method according to claim 4, characterized in that Also includes: 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; 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, characterized in that: 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, characterized in that 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, characterized in that Also includes: 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, characterized in that: 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 is used to acquire the current internal oil amount of the compressor according to the current working 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; 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, comprising: 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, characterized in that: When the computer program is executed by a processor, the air conditioning control method according to any one of claims 1 to 9 is implemented.

12. An air conditioning system, characterized in that: Comprising the air conditioning control device as claimed in claim 13.

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