Photovoltaic air conditioner oil return control method and device, photovoltaic air conditioner and storage medium

Abstract

The present disclosure relates to a photovoltaic air conditioner oil return control method and device, a photovoltaic air conditioner, and a storage medium. The photovoltaic air conditioner oil return control method includes: obtaining the photovoltaic panel power generation of the photovoltaic air conditioner; obtaining the working mode of the photovoltaic air conditioner, wherein the working mode includes a pure photovoltaic power mode, a pure alternating current mode, and an AC / DC hybrid power supply mode; determining the photovoltaic air conditioner's oil return parameters based on the photovoltaic air conditioner's working mode and the photovoltaic panel power generation, and performing oil return control according to the photovoltaic air conditioner's oil return parameters, wherein the oil return parameters include at least one of the oil return frequency, the oil return time, and the oil return cycle. The present disclosure can determine the photovoltaic air conditioner's oil return parameters based on the photovoltaic air conditioner's working mode and the photovoltaic panel power generation, and perform oil return control according to the photovoltaic air conditioner's oil return parameters. Therefore, the present disclosure can adjust the oil return control method when the photovoltaic power supply is pure and the power generation is insufficient, thereby ensuring the unit's operational reliability.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to a photovoltaic air conditioning oil return control method and device, a photovoltaic air conditioning and a storage medium. Background Art

[0002] Compared with ordinary air conditioners, mainstream photovoltaic air conditioners in related technologies are more flexible in terms of power supply. They can not only use DC power generated by photovoltaic panels or DC power provided by energy storage batteries, but also use AC power like conventional air conditioners, or a mixed power supply of DC and AC.

[0003] When operating in pure photovoltaic power mode, PV air conditioners cannot operate at full capacity due to factors such as insufficient installed photovoltaic panel capacity or power generation, and can only operate at a reduced frequency. However, during oil return, the compressor frequency generally needs to be operated at a high frequency or increased to the maximum frequency. Therefore, when power generation is insufficient and the PV air conditioner is operating purely on photovoltaic power (or pure DC power supply), the compressor frequency often cannot be increased to the maximum frequency, resulting in failure to complete oil return, affecting the reliability of the unit. Summary of the Invention

[0004] In view of at least one of the above technical problems, the present disclosure provides a photovoltaic air conditioner oil return control method and device, a photovoltaic air conditioner and a storage medium. When pure photovoltaic power supply is used and the power generation is insufficient, the oil return control method can be adjusted to ensure the reliability of the unit operation.

[0005] According to one aspect of the present disclosure, a photovoltaic air conditioner oil return control method is provided, comprising:

[0006] Get the power generated by the photovoltaic panels of the photovoltaic air conditioner;

[0007] Obtaining an operating mode of the photovoltaic air conditioner, wherein the operating mode includes a pure photovoltaic power mode, a pure alternating current power mode, and an AC / DC hybrid power supply mode;

[0008] According to the working mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, the oil return parameters of the photovoltaic air conditioner are determined, and the oil return control is performed according to the oil return parameters of the photovoltaic air conditioner, wherein the oil return parameters include at least one of the oil return frequency, the oil return time and the oil return cycle.

[0009] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the operating mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0010] When the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, the oil return parameters of the photovoltaic air conditioner are determined according to the power range of the photovoltaic panel power generation, and the oil return control is performed according to the oil return parameters of the photovoltaic air conditioner.

[0011] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0012] When the photovoltaic panel power generation power is less than the first power threshold and the working mode is pure photovoltaic power mode, the oil return is suspended, and the oil return is restarted when the photovoltaic panel power generation power is greater than or equal to the first power threshold; after waiting for a predetermined time, if the photovoltaic panel power generation power is still less than the first power threshold, the system is shut down, and the oil return is restarted when the photovoltaic panel power generation power is greater than or equal to the first power threshold.

[0013] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0014] When the photovoltaic panel power generation power is less than the first power threshold and the working mode is an AC / DC hybrid power supply mode, the system switches to using AC power supply for oil return and uses initial target oil return parameters for oil return, wherein the initial target oil return parameters include at least one of an initial target oil return frequency, an initial target oil return time, and an initial target oil return period.

[0015] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0016] When the photovoltaic panel power generation power is greater than or equal to the second power threshold and the operating mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, photovoltaic power is used for oil return and oil return control is performed according to the initial target oil return parameters, wherein the second power threshold is greater than the first power threshold.

[0017] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0018] When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, photovoltaic power is used for oil return, and oil return control is performed according to target oil return parameters, wherein the second power threshold is greater than the first power threshold, and the target oil return parameters include at least one of a target oil return frequency, a target oil return time, and a target oil return cycle, the target oil return frequency is less than the initial target oil return frequency, the target oil return time is greater than the initial target oil return time, and the target oil return cycle is shorter than the initial target oil return cycle.

[0019] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0020] When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, if the photovoltaic panel power generation power increases, the target oil return frequency is increased, the target oil return time is shortened, and the target oil return cycle is lengthened; if the photovoltaic panel power generation power decreases, the target oil return frequency is decreased, the target oil return time is lengthened, and the target oil return cycle is shortened.

[0021] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0022] When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, N power thresholds are set within a range greater than the first power threshold and less than the second power threshold. The first power threshold, the second power threshold, and the N power thresholds form N+1 power ranges, where N is a natural number greater than 0, and the N+1 power ranges correspond to different N+1 sets of target oil return parameters.

[0023] When the power generated by the photovoltaic panels is within N+1 power ranges, photovoltaic power is used for oil return, and oil return control is performed according to the corresponding N+1 groups of target oil return parameters.

[0024] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0025] When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, a third power threshold is set within a range greater than the first power threshold and less than the second power threshold;

[0026] When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the third power threshold, the photovoltaic power is used for oil return, and the oil return is controlled according to a second target oil return parameter, wherein the second target oil return parameter includes at least one of a second target oil return frequency, a second target oil return time, and a second target oil return period;

[0027] When the photovoltaic panel power generation power is less than the third power threshold and greater than or equal to the first power threshold, photovoltaic power is used for oil return, and oil return is controlled according to a third target oil return parameter, wherein the third target oil return parameter includes at least one of a third target oil return frequency, a third target oil return time, and a third target oil return period.

[0028] In some embodiments of the present disclosure, the initial target oil return frequency is higher than the second target oil return frequency, and the second target oil return frequency is higher than the third target oil return frequency; the initial target oil return time is less than the second target oil return time, and the second target oil return time is less than the third target oil return time; the initial target oil return period is greater than the second target oil return period, and the second target oil return period is greater than the third target oil return period.

[0029] In some embodiments of the present disclosure, determining the oil return parameters of the photovoltaic air conditioner according to the operating mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes:

[0030] When the working mode is pure AC mode, AC power is used for oil return, and initial target oil return parameters are used for oil return, wherein the initial target oil return parameters include at least one of an initial target oil return frequency, an initial target oil return time, and an initial target oil return period.

[0031] According to another aspect of the present disclosure, there is provided a photovoltaic air conditioner oil return control device, comprising:

[0032] A photovoltaic panel power acquisition module is configured to acquire the photovoltaic panel power generated by the photovoltaic air conditioner;

[0033] an operating mode acquisition module configured to acquire an operating mode of the photovoltaic air conditioner, wherein the operating mode includes a pure photovoltaic power mode, a pure alternating current power mode, and an AC / DC hybrid power supply mode;

[0034] The oil return control module is configured to determine the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner, wherein the oil return parameters include at least one of the oil return frequency, oil return time and oil return cycle.

[0035] According to another aspect of the present disclosure, there is provided a photovoltaic air conditioner oil return control device, comprising:

[0036] a memory for storing instructions;

[0037] The processor is configured to execute the instructions so that the photovoltaic air-conditioning oil return control device performs operations to implement the photovoltaic air-conditioning oil return control method as described in any of the above embodiments.

[0038] According to another aspect of the present disclosure, a photovoltaic air conditioner is provided, comprising the photovoltaic air conditioner oil return control device according to any one of the above embodiments.

[0039] According to another aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the photovoltaic air conditioner oil return control method as described in any of the above embodiments is implemented.

[0040] The present disclosure can determine the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner. Therefore, the present disclosure can adjust the oil return control method when the power supply is purely photovoltaic and the power generation is insufficient, so as to ensure the reliability of the unit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 Schematic diagram of some embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention.

[0043] Figure 2 Schematic diagram of other embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention.

[0044] Figure 3 Schematic diagram of some further embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention.

[0045] Figure 4 Schematic diagram of some embodiments of the photovoltaic air conditioner oil return control device disclosed in the present invention.

[0046] Figure 5 Schematic diagram of the structure of other embodiments of the photovoltaic air conditioner oil return control device disclosed in the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0048] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0049] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0050] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0051] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0052] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] The inventors discovered through research that the technical problem of the related technology is that when powered by pure photovoltaic power, due to power limitations, the compressor cannot rise to the target oil return frequency and cannot complete oil return normally.

[0054] In view of at least one of the above technical problems, the present disclosure provides a photovoltaic air conditioner oil return control method and device, a photovoltaic air conditioner and a storage medium. The present disclosure is described below through specific embodiments.

[0055] Figure 1 Schematic diagram of some embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention. Preferably, Figure 1 The embodiment can be executed by the photovoltaic air conditioner oil return control device or the photovoltaic air conditioner of the present disclosure. Figure 1 As shown, Figure 1 The method of the embodiment may include at least one of steps 100 to 300, wherein:

[0056] Step 100: Obtain the photovoltaic panel power generation power Pf of the photovoltaic air conditioner, wherein the photovoltaic panel power generation power Pf is the photovoltaic panel power supplied to the photovoltaic group by the photovoltaic panel.

[0057] Step 200: Acquire the working mode of the photovoltaic air conditioner, wherein the working mode includes a pure photovoltaic power mode (or pure DC power supply mode), a pure AC power mode, and an AC / DC hybrid power supply mode.

[0058] Step 300: Determine the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the power generation power Pf of the photovoltaic panel, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner, wherein the oil return parameters include at least one of the oil return frequency, oil return time and oil return cycle.

[0059] The present disclosure can determine the oil return parameters of a photovoltaic air conditioner based on the operating mode of the photovoltaic air conditioner and the power generated by the photovoltaic panels, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner. Thus, the present disclosure can determine the oil return parameters of a photovoltaic air conditioner based on the operating mode of the photovoltaic air conditioner and the power generated by the photovoltaic panels, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner. This ensures that the unit can still complete oil return normally in a pure photovoltaic power mode, thereby ensuring the reliability of the unit's operation. The present disclosure can adjust the oil return control method when power generation is insufficient, thereby ensuring the reliability of the unit's operation.

[0060] Figure 2 Schematic diagram of some other embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention. Preferably, Figure 2 The embodiment can be executed by the photovoltaic air conditioner oil return control device or the photovoltaic air conditioner of the present disclosure. Figure 2 As shown, Figure 2 The method of the embodiment (eg Figure 1 Step 300 of the embodiment may include at least one of steps 310 to 320, wherein:

[0061] Step 310: When the working mode is pure AC power mode, AC power is used for oil return, and initial target oil return parameters are used for oil return. The initial target oil return parameters include at least one of an initial target oil return frequency F1, an initial target oil return time T1, and an initial target oil return period H1. The oil return period is the interval between oil returns.

[0062] The above embodiments of the present disclosure operate in pure AC power mode using AC power supply, and the oil return frequency, cycle, etc. do not need to be adjusted and are directly processed according to the initial target value.

[0063] Step 320 , when the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, the oil return parameters of the photovoltaic air conditioner are determined according to the power range of the photovoltaic panel power generation power Pf, and the oil return control is performed according to the oil return parameters of the photovoltaic air conditioner.

[0064] In the above embodiments of the present disclosure, in a pure photovoltaic power mode or an AC / DC hybrid power supply mode, the oil return parameters and the oil return strategy are determined according to the power range of the photovoltaic panel power generation.

[0065] The above-mentioned embodiments of the present disclosure can set corresponding oil return control methods for different power supply modes, thereby ensuring reliable oil return.

[0066] Figure 3 Schematic diagram of some other embodiments of the photovoltaic air conditioner oil return control method disclosed in the present invention. Preferably, Figure 3 The embodiment can be executed by the photovoltaic air conditioner oil return control device or the photovoltaic air conditioner of the present disclosure. Figure 3 As shown, Figure 3 The method of the embodiment (eg Figure 2 Step 320 of the embodiment may include at least one of steps 321 to 324, wherein:

[0067] Step 321: When the photovoltaic panel power generation power Pf is less than the first power threshold value P1 (i.e., insufficient power generation) and the operating mode is the pure photovoltaic power mode, the oil return is suspended, and the oil return is restarted when the photovoltaic panel power generation power Pf is greater than or equal to the first power threshold value P1; after waiting for a predetermined time, if the photovoltaic panel power generation power Pf is still less than the first power threshold value P1, the system is shut down, and the oil return is restarted when the photovoltaic panel power generation power Pf is greater than or equal to the first power threshold value P1.

[0068] In some embodiments of the present disclosure, the predetermined time is 1 hour.

[0069] In the above embodiment of the present disclosure, when the photovoltaic panel power generation is less than P3, oil return is not performed first, and oil return is performed after Pf is greater than P3. In this way, direct current is used as much as possible to return oil, thereby improving energy efficiency.

[0070] The above embodiment of the present disclosure also designs a maximum waiting time, and the machine is shut down when the maximum waiting time is reached, thereby avoiding the risk of oil shortage caused by continuing to operate when the oil storage amount in the compressor and the oil separator is already low.

[0071] Step 322: When the photovoltaic panel power generation power Pf is less than the first power threshold P1 and the operating mode is the AC / DC hybrid power supply mode, switch to using AC power supply for oil return and use initial target oil return parameters for oil return, where the initial target oil return parameters include at least one of the initial target oil return frequency F1, the initial target oil return time T1, and the initial target oil return period H1.

[0072] In the above embodiment of the present disclosure, when hybrid power is used, if the DC power is too low to meet the minimum oil return requirement, the machine can be switched to AC power for oil return without shutting down. While this does not eliminate energy savings, it ensures comfort and normal operation without shutting down the machine.

[0073] Step 323: When the photovoltaic panel power generation power Pf is greater than or equal to the second power threshold P2 and the operating mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, photovoltaic power is used for oil return and oil return control is performed according to the initial target oil return parameters, wherein the second power threshold P2 is greater than the first power threshold P1.

[0074] In the above embodiment of the present disclosure, if the photovoltaic panel power generation power Pf is greater than the second power threshold P2, the unit will be processed according to the initial oil return frequency, oil return time, etc. In this case, the photovoltaic power generation is large enough to fully meet the unit operation needs.

[0075] Step 324: When the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is the pure photovoltaic power mode or the AC / DC hybrid power supply mode, the photovoltaic power supply is used for oil return, and the oil return is controlled according to the target oil return parameters, wherein the second power threshold P2 is greater than the first power threshold P1, and the target oil return parameters include at least one of a target oil return frequency, a target oil return time, and a target oil return cycle, wherein the target oil return frequency is less than the initial target oil return frequency F1, the target oil return time is greater than the initial target oil return time T1, and the target oil return cycle is shorter than the initial target oil return cycle H1.

[0076] In the above embodiment of the present disclosure, the photovoltaic panel power generation is within the range of P1 to P2, and the oil return is powered by photovoltaic power, and the oil return is controlled according to the target oil return parameters. In the above embodiment of the present disclosure, direct current is used for oil return as much as possible, thereby improving energy efficiency.

[0077] In some embodiments of the present disclosure, step 324 may include: when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, if the photovoltaic panel power generation power Pf increases, the target oil return frequency is increased, the target oil return time is shortened, and the target oil return cycle is lengthened; if the photovoltaic panel power generation power Pf decreases, the target oil return frequency is decreased, the target oil return time is lengthened, and the target oil return cycle is shortened.

[0078] The photovoltaic panel power generation power of the above embodiment of the present disclosure is within the range of P1 to P2, and can be qualitatively adjusted. If the power generation amount increases, the target oil return frequency is increased, the target oil return time is shortened, and the target oil return cycle is lengthened; if the photovoltaic panel power generation power decreases, the target oil return frequency is decreased, the target oil return time is lengthened, and the target oil return cycle is shortened.

[0079] In some embodiments of the present disclosure, step 324 may include: when the photovoltaic panel power generation power Pf is less than a second power threshold P2 and greater than or equal to a first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, setting N power thresholds within a range greater than the first power threshold P1 and less than the second power threshold P2, with the first power threshold P1, the second power threshold P2, and the N power thresholds forming N+1 power ranges, where N is a natural number greater than 0, and the N+1 power ranges correspond to N+1 different sets of target oil return parameters; when the photovoltaic panel power generation power Pf is within each of the N+1 power ranges, using photovoltaic power for oil return, and performing oil return control according to the corresponding N+1 sets of target oil return parameters. For example, if one power threshold is set within a range greater than the first power threshold P1 and less than the second power threshold P2, the first power threshold P1, the second power threshold P2, and the N power thresholds forming two power ranges. In the range greater than the first power threshold P1 and less than the second power threshold P2, two power thresholds are set, and the first power threshold P1, the second power threshold P2 and the N power thresholds form three power ranges.

[0080] The photovoltaic panel power generation in the above-mentioned embodiment of the present disclosure can be quantitatively adjusted within the range of P1 to P2. Within the range of P1 to P2, N+1 power ranges can be formed based on N thresholds. Within each power range, a quantitative relationship is established between power generation and oil return frequency and oil return time. This allows for graded control and adjustment.

[0081] In some embodiments of the present disclosure, step 324 may include: when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, setting a third power threshold P3 within a range greater than the first power threshold P1 and less than the second power threshold P2; when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the third power threshold P3, using photovoltaic power for oil return and performing oil return control according to a second target oil return parameter, wherein the second target oil return parameter includes at least one of a second target oil return frequency F2, a second target oil return time T2, and a second target oil return period H2; when the photovoltaic panel power generation power Pf is less than the third power threshold P3 and greater than or equal to the first power threshold P1, using photovoltaic power for oil return and performing oil return control according to a third target oil return parameter, wherein the third target oil return parameter includes at least one of a third target oil return frequency F3, a third target oil return time T3, and a third target oil return period H3.

[0082] In the above-mentioned embodiment of the present disclosure, the photovoltaic panel power generation power can be quantitatively adjusted within the range of P1 to P2. Within the range of P1 to P2, if N = 1, two power ranges can be formed based on one threshold. Within each power range, a quantitative relationship is established between the power generation and the oil return frequency and oil return time, allowing for step-by-step control and adjustment.

[0083] In some embodiments of the present disclosure, the initial target oil return frequency F1 is higher than the second target oil return frequency F2, and the second target oil return frequency F2 is higher than the third target oil return frequency F3; the initial target oil return time T1 is less than the second target oil return time T2, and the second target oil return time T2 is less than the third target oil return time T3; the initial target oil return period H1 is greater than the second target oil return period H2, and the second target oil return period H2 is greater than the third target oil return period H3.

[0084] In some embodiments of the present disclosure, F1, F2, F3, H1, H2, H3, P1, P2, P3, T1, T2, and T3 are specific constant values, and the specific value ranges of F1, F2, F3, H1, H2, H3, P1, P2, P3, T1, T2, and T3 will vary based on different capacities and different compressors.

[0085] The numerical values ​​of F1, F2, F3, H1, H2, H3, P1, P2, P3, T1, T2, and T3 below are only examples. The numerical values ​​may vary for different compressors and capacities.

[0086] In some embodiments of the present disclosure, the initial target oil return frequency F1 can be set to about the maximum frequency of the compressor, for example: the recommended value of F1 is 120 Hz; the second target oil return frequency F2 can be set to about 10 Hz lower than the maximum frequency of the compressor, for example: the recommended value of F2 is 100-110 Hz; the third target oil return frequency F3 can be set to about 20 Hz lower than the maximum frequency of the compressor, for example: the recommended value of F2 is 70-90 Hz.

[0087] In some embodiments of the present disclosure, the empirical value of the initial target oil return time T1 is about 5 minutes, the second target oil return time T2 can be about 7 minutes, and the third target oil return time T3 can be about 10 minutes.

[0088] In some embodiments of the present disclosure, the initial target oil return period H1 can be set to about 4 hours; the second target oil return period H2 can be set to about 3 hours; and the third target oil return period H3 can be set to about 2 hours.

[0089] In some embodiments of the present disclosure, the second power threshold P2 is related to the maximum operating power of the unit and is generally close to the maximum operating power of the unit. However, the maximum operating power of units of different capacities is different and needs to be set specifically for each unit.

[0090] In some embodiments of the present disclosure, the third power threshold P3 may be set to 60% to 70% of the second power threshold P2, that is, the third power threshold P3 may be set to (60% to 70%)×P2.

[0091] In some embodiments of the present disclosure, the first power threshold P1 may be set to 30% to 40% of the second power threshold P2. The first power threshold P1 may be set to (30% to 40%)×P2.

[0092] The above-mentioned embodiments of the present disclosure provide an improved oil return control method for photovoltaic air conditioners. This method dynamically adjusts the oil return frequency and timing based on the power generation of the photovoltaic panels. Even if power generation is insufficient, the present disclosure ensures that the unit can complete oil return normally in pure photovoltaic power mode, ensuring reliable operation of the unit. The above-mentioned embodiments of the present disclosure design oil return control methods for different power supply modes, maximizing the use of photovoltaic power while ensuring reliable oil return, thereby improving energy efficiency.

[0093] The following describes the oil return control in the three modes of the present disclosure: pure photovoltaic power mode, pure AC power mode, and AC / DC hybrid power mode, through embodiments.

[0094] Pure photovoltaic mode:

[0095]

[0096] Table 1

[0097] Table 1 shows the designed oil return frequency and duration for different power generation amounts in pure photovoltaic mode. As shown in Table 1, in pure photovoltaic mode, if the photovoltaic panel power generation is high (greater than P2), the unit will operate according to the initial target oil return frequency F1, initial target oil return duration T1, and initial target oil return period H1. This indicates that the photovoltaic power generation is sufficient to fully meet the unit's operating requirements.

[0098] In pure photovoltaic power mode, if the power generation of the photovoltaic panel is low, the target oil return frequency is lowered. After the oil return frequency is lowered, the oil return effect decreases, so the oil return duration needs to be extended.

[0099] Specifically, as shown in Table 1, when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the third power threshold P3, photovoltaic power is used for oil return, and oil return control is performed according to the second target oil return parameter, wherein the second target oil return parameter includes at least one of the second target oil return frequency F2, the second target oil return time T2, and the second target oil return period H2.

[0100] As shown in Table 1, when the photovoltaic panel power generation power Pf is less than the third power threshold P3 and greater than or equal to the first power threshold P1, photovoltaic power is used for oil return, and oil return control is performed according to the third target oil return parameter, where the third target oil return parameter includes at least one of the third target oil return frequency F3, the third target oil return time T3, and the third target oil return period H3.

[0101] In some embodiments of the present disclosure, the initial target oil return frequency F1 is higher than the second target oil return frequency F2, and the second target oil return frequency F2 is higher than the third target oil return frequency F3; the initial target oil return time T1 is less than the second target oil return time T2, and the second target oil return time T2 is less than the third target oil return time T3; the initial target oil return period H1 is greater than the second target oil return period H2, and the second target oil return period H2 is greater than the third target oil return period H3.

[0102] In pure photovoltaic power mode, as shown in Table 1, if the photovoltaic panel power generation power Pf is small to a certain extent, for example, the photovoltaic panel power generation power Pf is less than the first power threshold P1, it can no longer meet the requirements of oil return operation. In this case, oil return will not be performed first. When the power generation power Pf is greater than the first power threshold P1 and the minimum oil return frequency setting is met, oil return will be performed. If the power generation condition is still not met after waiting for one hour, the oil storage amount in the compressor and oil separator is already low, and there is a risk of oil shortage if continued operation. In this case, the machine will be shut down first and restarted for oil return when the power generation power increases.

[0103] Pure AC mode:

[0104]

[0105]

[0106] Table 2

[0107] Table 2 shows the design of the oil return frequency and duration in pure AC mode. As shown in Table 2, in pure AC mode, operating only with AC power, the oil return frequency and period do not need to be adjusted and are processed directly at the initial target values.

[0108] As shown in Table 2, when the working mode is pure AC mode, AC power is used for oil return, and initial target oil return parameters are used for oil return, where the initial target oil return parameters include at least one of the initial target oil return frequency F1, the initial target oil return time T1, and the initial target oil return period H1.

[0109] AC / DC hybrid power supply mode:

[0110] Power generation / KW Oil return frequency / Hz Oil return time / min Oil return cycle / min P2≤Pf F1 T1 H1 P3≤Pf<P2 F2 T2 H2 P1≤Pf<P3 F3 T3 H3 Pf<P1 F1 T1 H1

[0111] Table 3

[0112] Table 3 shows the design of oil return frequency and duration in the AC / DC hybrid power supply mode. As shown in Table 3, DC power is used preferentially for oil return in the AC / DC hybrid power supply mode to improve energy efficiency.

[0113] This differs from the pure PV power supply mode in that, during hybrid power supply, if the DC power is low and the PV panel power (Pf) is less than the first power threshold (P1), failing to meet the minimum oil return requirement, the system switches to AC power for oil return without shutting down. In this case, the energy-saving benefits are lost, but comfort and normal operation are maintained without shutting down.

[0114] In the other three cases, the control is the same as that of the pure photovoltaic power supply mode.

[0115] Specifically, in the AC / DC hybrid power supply mode, as shown in Table 3, if the power generation of the photovoltaic panel is large and the power generation of the photovoltaic panel is greater than P2, the unit will be processed according to the initial target oil return frequency F1, the initial target oil return time T1 and the initial target oil return period H1.

[0116] In the AC / DC hybrid power supply mode, as shown in Table 3, when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the third power threshold P3, photovoltaic power is used for oil return, and oil return control is performed according to the second target oil return parameter, where the second target oil return parameter includes at least one of a second target oil return frequency F2, a second target oil return time T2, and a second target oil return period H2.

[0117] In the AC / DC hybrid power supply mode, as shown in Table 3, when the photovoltaic panel power generation power Pf is less than the third power threshold P3 and greater than or equal to the first power threshold P1, photovoltaic power is used for oil return, and oil return is controlled according to third target oil return parameters, where the third target oil return parameters include at least one of a third target oil return frequency F3, a third target oil return time T3, and a third target oil return period H3.

[0118] The above-mentioned embodiments of the present disclosure provide an oil return control method suitable for photovoltaic air conditioners. This method establishes a quantitative relationship between the photovoltaic panel's power generation and the oil return frequency and duration. When power generation is high, the target oil return frequency is higher and the oil return duration is shorter. Conversely, when power generation is low, the target oil return frequency is lowered and the oil return duration is extended. Furthermore, the above-mentioned embodiments of the present disclosure design different oil return methods for different power supply modes. The above-mentioned embodiments of the present disclosure utilize DC power for oil return whenever possible, thereby improving energy efficiency.

[0119] Figure 4 Schematic diagram of some embodiments of the photovoltaic air conditioner oil return control device disclosed in the present invention. Figure 4As shown, the photovoltaic air conditioner oil return control device disclosed herein may include a photovoltaic panel power acquisition module 41, an operating mode acquisition module 42, and an oil return control module 43, wherein:

[0120] The photovoltaic panel power acquisition module 41 is configured to acquire the photovoltaic panel power Pf of the photovoltaic air conditioner.

[0121] The working mode acquisition module 42 is configured to acquire the working mode of the photovoltaic air conditioner, wherein the working mode includes a pure photovoltaic power mode, a pure alternating current power mode, and an AC / DC hybrid power supply mode.

[0122] The oil return control module 43 is configured to determine the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the photovoltaic panel power generation power Pf, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner, wherein the oil return parameters include at least one of the oil return frequency, oil return time and oil return cycle.

[0123] In some embodiments of the present disclosure, the oil return control module 43 can be configured to use AC power for oil return when the operating mode is a pure AC power mode, and to use initial target oil return parameters for oil return, wherein the initial target oil return parameters include at least one of an initial target oil return frequency F1, an initial target oil return time T1, and an initial target oil return period H1.

[0124] In some embodiments of the present disclosure, the oil return control module 43 can be configured to determine the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation power Pf when the working mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner.

[0125] In some embodiments of the present disclosure, the oil return control module 43 can be configured to suspend oil return when the photovoltaic panel power generation power Pf is less than the first power threshold value P1 (i.e., insufficient power generation) and the operating mode is a pure photovoltaic power mode, and restart oil return when the photovoltaic panel power generation power Pf is greater than or equal to the first power threshold value P1; and then shut down if the photovoltaic panel power generation power Pf is still less than the first power threshold value P1 after waiting for a predetermined time, and restart oil return when the photovoltaic panel power generation power Pf is greater than or equal to the first power threshold value P1.

[0126] In some embodiments of the present disclosure, the predetermined time is 1 hour.

[0127] In some embodiments of the present disclosure, the oil return control module 43 can be configured to switch to AC power supply for oil return when the photovoltaic panel power generation power Pf is less than the first power threshold P1 and the operating mode is an AC / DC hybrid power supply mode, and to use initial target oil return parameters for oil return, wherein the initial target oil return parameters include at least one of the initial target oil return frequency F1, the initial target oil return time T1 and the initial target oil return period H1.

[0128] In some embodiments of the present disclosure, the oil return control module 43 can be configured to use photovoltaic power supply for oil return when the photovoltaic panel power generation power Pf is greater than or equal to the second power threshold P2 and the working mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, and to perform oil return control according to the initial target oil return parameters, wherein the second power threshold P2 is greater than the first power threshold P1.

[0129] In some embodiments of the present disclosure, the oil return control module 43 can be configured to use photovoltaic power supply for oil return when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, and perform oil return control according to target oil return parameters, wherein the second power threshold P2 is greater than the first power threshold P1, and the target oil return parameters include at least one of a target oil return frequency, a target oil return time, and a target oil return cycle, the target oil return frequency is less than the initial target oil return frequency F1, the target oil return time is greater than the initial target oil return time T1, and the target oil return cycle is shorter than the initial target oil return cycle H1.

[0130] In some embodiments of the present disclosure, the oil return control module 43 can be configured to, when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, if the photovoltaic panel power generation power Pf increases, the target oil return frequency is increased, the target oil return time is shortened, and the target oil return cycle is lengthened; if the photovoltaic panel power generation power Pf decreases, the target oil return frequency is decreased, the target oil return time is lengthened, and the target oil return cycle is shortened.

[0131] In some embodiments of the present disclosure, the oil return control module 43 may be configured to, when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, set N power thresholds within a range greater than the first power threshold P1 and less than the second power threshold P2. The first power threshold P1, the second power threshold P2, and the N power thresholds form N+1 power ranges, where N is a natural number greater than 0, and the N+1 power ranges correspond to N+1 different sets of target oil return parameters. When the photovoltaic panel power generation power Pf is within each of the N+1 power ranges, oil return is performed using photovoltaic power supply, and oil return control is performed according to the corresponding N+1 sets of target oil return parameters. For example, if one power threshold is set within a range greater than the first power threshold P1 and less than the second power threshold P2, the first power threshold P1, the second power threshold P2, and the N power thresholds form two power ranges. In the range greater than the first power threshold P1 and less than the second power threshold P2, two power thresholds are set, and the first power threshold P1, the second power threshold P2 and the N power thresholds form three power ranges.

[0132] In some embodiments of the present disclosure, the oil return control module 43 may be configured to set a third power threshold P3 within a range greater than the first power threshold P1 and less than the second power threshold P2 when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the first power threshold P1, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode; when the photovoltaic panel power generation power Pf is less than the second power threshold P2 and greater than or equal to the third power threshold P3, use photovoltaic power for oil return and perform oil return control according to a second target oil return parameter, wherein the second target oil return parameter includes at least one of a second target oil return frequency F2, a second target oil return time T2, and a second target oil return period H2; when the photovoltaic panel power generation power Pf is less than the third power threshold P3 and greater than or equal to the first power threshold P1, use photovoltaic power for oil return and perform oil return control according to a third target oil return parameter, wherein the third target oil return parameter includes at least one of a third target oil return frequency F3, a third target oil return time T3, and a third target oil return period H3.

[0133] In some embodiments of the present disclosure, the initial target oil return frequency F1 is higher than the second target oil return frequency F2, and the second target oil return frequency F2 is higher than the third target oil return frequency F3; the initial target oil return time T1 is less than the second target oil return time T2, and the second target oil return time T2 is less than the third target oil return time T3; the initial target oil return period H1 is greater than the second target oil return period H2, and the second target oil return period H2 is greater than the third target oil return period H3.

[0134] In some embodiments of the present disclosure, the photovoltaic air conditioner oil return control device of the present disclosure can be configured to perform any of the above embodiments of the present disclosure (for example, Figures 1 to 3 The photovoltaic air conditioning oil return control method described in any embodiment).

[0135] Figure 5 Schematic diagram of the structure of some other embodiments of the photovoltaic air conditioner oil return control device disclosed in the present invention. Figure 5 As shown, the photovoltaic air-conditioning oil return control device disclosed herein includes a memory 51 and a processor 52 .

[0136] The memory 51 is used to store instructions. The processor 52 is coupled to the memory 51. The processor 52 is configured to execute the above embodiments (for example, Figures 1 to 3 The photovoltaic air conditioner oil return control method involved in any embodiment)

[0137] like Figure 5 As shown, the photovoltaic air conditioner oil return control device also includes a communication interface 53 for exchanging information with other devices. At the same time, the photovoltaic air conditioner oil return control device also includes a bus 54, through which the processor 52, the communication interface 53, and the memory 51 communicate with each other.

[0138] The memory 51 may include high-speed RAM memory or non-volatile memory, such as at least one disk storage device. The memory 51 may also be a memory array. The memory 51 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0139] Furthermore, the processor 52 may be a central processing unit (CPU), or may be an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the present disclosure.

[0140] According to another aspect of the present disclosure, a photovoltaic air conditioner is provided, comprising any one of the above embodiments (e.g. Figure 4 or Figure 5 The photovoltaic air conditioning oil return control device described in Example 1.

[0141] According to another aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the computer-readable storage medium implements any of the above embodiments (e.g. Figures 1 to 3 The photovoltaic air conditioning oil return control method described in any embodiment).

[0142] The computer-readable storage medium of the present disclosure may be implemented as a non-transitory computer-readable storage medium.

[0143] The above-mentioned embodiments of the present disclosure provide an improved oil return control method for photovoltaic air conditioners. This method dynamically adjusts the oil return frequency and timing based on the power generation of the photovoltaic panels. Even if power generation is insufficient, the present disclosure ensures that the unit can complete oil return normally in pure photovoltaic power mode, ensuring reliable operation of the unit. The above-mentioned embodiments of the present disclosure design oil return control methods for different power supply modes, maximizing the use of photovoltaic power while ensuring reliable oil return, thereby improving energy efficiency.

[0144] Those skilled in the art will appreciate that embodiments of the present disclosure may be provided as methods, apparatus, 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 aspects. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0145] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks 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 processor 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 generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0146] 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 work 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 The function specified in one or more boxes.

[0147] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0148] The photovoltaic air-conditioning oil return control device, photovoltaic panel power acquisition module, working mode acquisition module and oil return control module described above can be implemented as a general-purpose processor, programmable logic controller (PLC), digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof for performing the functions described in this application.

[0149] Those skilled in the art will appreciate that all or part of the steps of the above-described embodiments of the present disclosure may be accomplished by hardware, and the hardware may be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any appropriate combination thereof for executing the methods described herein.

[0150] The present disclosure has been described in detail so far. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0151] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by instructing the relevant hardware through a program, and the program may be stored in a non-transitory computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0152] The description of the present disclosure is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure and to enable those skilled in the art to understand the present disclosure and design various embodiments with various modifications suitable for specific applications.

Claims

1. A photovoltaic air conditioner oil return control method, comprising: Get the power generated by the photovoltaic panels of the photovoltaic air conditioner; Obtaining an operating mode of the photovoltaic air conditioner, wherein the operating mode includes a pure photovoltaic power mode, a pure alternating current power mode, and an AC / DC hybrid power supply mode; Determining an oil return parameter of the photovoltaic air conditioner according to the operating mode of the photovoltaic air conditioner and the power generated by the photovoltaic panel, and performing oil return control according to the oil return parameter of the photovoltaic air conditioner, wherein the oil return parameter includes at least one of an oil return frequency, an oil return time, and an oil return period; The step of determining the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, the oil return parameters of the photovoltaic air conditioner are determined according to the power range of the photovoltaic panel power generation, and the oil return control is performed according to the oil return parameters of the photovoltaic air conditioner; The determining of the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner include: When the photovoltaic panel power generation power is less than the first power threshold and the working mode is the pure photovoltaic power mode, the oil return is suspended and the oil return is restarted when the photovoltaic panel power generation power is greater than or equal to the first power threshold.

2. The photovoltaic air conditioner oil return control method according to claim 1, wherein: The step of determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner further includes: When the power generated by the photovoltaic panel is less than the first power threshold and the working mode is pure photovoltaic power mode, the oil return is suspended. After waiting for a predetermined time, if the power generated by the photovoltaic panel is still less than the first power threshold, the machine is shut down and the power return is restarted when the power generated by the photovoltaic panel is greater than or equal to the first power threshold.

3. The photovoltaic air conditioner oil return control method according to claim 1, wherein: The step of determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner further includes: When the photovoltaic panel power generation power is less than the first power threshold and the working mode is an AC / DC hybrid power supply mode, the system switches to using AC power supply for oil return and uses initial target oil return parameters for oil return, wherein the initial target oil return parameters include at least one of an initial target oil return frequency, an initial target oil return time, and an initial target oil return period.

4. The photovoltaic air conditioner oil return control method according to any one of claims 1 to 3, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the photovoltaic panel power generation power is greater than or equal to the second power threshold and the operating mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, photovoltaic power is used for oil return and oil return control is performed according to the initial target oil return parameters, wherein the second power threshold is greater than the first power threshold.

5. The photovoltaic air conditioner oil return control method according to any one of claims 1 to 3, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, photovoltaic power is used for oil return, and oil return control is performed according to target oil return parameters, wherein the second power threshold is greater than the first power threshold, and the target oil return parameters include at least one of a target oil return frequency, a target oil return time, and a target oil return period.

6. The photovoltaic air conditioner oil return control method according to claim 5, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, if the photovoltaic panel power generation power increases, the target oil return frequency is increased, the target oil return time is shortened, and the target oil return cycle is lengthened; if the photovoltaic panel power generation power decreases, the target oil return frequency is decreased, the target oil return time is lengthened, and the target oil return cycle is shortened.

7. The photovoltaic air conditioner oil return control method according to claim 6, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is a pure photovoltaic power mode or an AC / DC hybrid power supply mode, N power thresholds are set within a range greater than the first power threshold and less than the second power threshold. The first power threshold, the second power threshold, and the N power thresholds form N+1 power ranges, where N is a natural number greater than 0, and the N+1 power ranges correspond to different N+1 sets of target oil return parameters. When the power generated by the photovoltaic panels is within N+1 power ranges, photovoltaic power is used for oil return, and oil return control is performed according to the corresponding N+1 groups of target oil return parameters.

8. The photovoltaic air conditioner oil return control method according to claim 7, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the first power threshold, and the operating mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, a third power threshold is set within a range greater than the first power threshold and less than the second power threshold; When the photovoltaic panel power generation power is less than the second power threshold and greater than or equal to the third power threshold, the photovoltaic power is used for oil return, and the oil return is controlled according to a second target oil return parameter, wherein the second target oil return parameter includes at least one of a second target oil return frequency, a second target oil return time, and a second target oil return period; When the photovoltaic panel power generation power is less than the third power threshold and greater than or equal to the first power threshold, photovoltaic power is used for oil return, and oil return is controlled according to a third target oil return parameter, wherein the third target oil return parameter includes at least one of a third target oil return frequency, a third target oil return time, and a third target oil return period.

9. The photovoltaic air conditioner oil return control method according to claim 8, wherein: The initial target oil return frequency is higher than the second target oil return frequency, and the second target oil return frequency is higher than the third target oil return frequency; The initial target oil return time is less than the second target oil return time, and the second target oil return time is less than the third target oil return time; The initial target oil return period is greater than the second target oil return period, and the second target oil return period is greater than the third target oil return period.

10. The photovoltaic air conditioner oil return control method according to any one of claims 1 to 3, wherein: Determining the oil return parameters of the photovoltaic air conditioner according to the working mode of the photovoltaic air conditioner and the power generation power of the photovoltaic panel, and performing oil return control according to the oil return parameters of the photovoltaic air conditioner includes: When the working mode is pure AC mode, AC power is used for oil return, and initial target oil return parameters are used for oil return, wherein the initial target oil return parameters include at least one of an initial target oil return frequency, an initial target oil return time, and an initial target oil return period.

11. A photovoltaic air conditioner oil return control device, comprising: A photovoltaic panel power acquisition module is configured to acquire the photovoltaic panel power generated by the photovoltaic air conditioner; an operating mode acquisition module configured to acquire an operating mode of the photovoltaic air conditioner, wherein the operating mode includes a pure photovoltaic power mode, a pure alternating current power mode, and an AC / DC hybrid power supply mode; an oil return control module configured to determine an oil return parameter of the photovoltaic air conditioner according to an operating mode of the photovoltaic air conditioner and a power generated by the photovoltaic panel, and to perform oil return control according to the oil return parameter of the photovoltaic air conditioner, wherein the oil return parameter includes at least one of an oil return frequency, an oil return time, and an oil return period; The oil return control module is configured to determine the oil return parameters of the photovoltaic air conditioner according to the power range of the photovoltaic panel power generation when the working mode is pure photovoltaic power mode or AC / DC hybrid power supply mode, and perform oil return control according to the oil return parameters of the photovoltaic air conditioner; Among them, the oil return control module is configured to suspend oil return when the photovoltaic panel power generation power is less than the first power threshold and the working mode is pure photovoltaic power mode, and wait until the photovoltaic panel power generation power is greater than or equal to the first power threshold before starting oil return.

12. A photovoltaic air conditioner oil return control device, comprising: a memory for storing instructions; The processor is configured to execute the instruction so that the photovoltaic air-conditioning oil return control device implements the photovoltaic air-conditioning oil return control method according to any one of claims 1 to 10.

13. A photovoltaic air conditioner, comprising the photovoltaic air conditioner oil return control device according to claim 11 or 12.

14. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the photovoltaic air conditioner oil return control method according to any one of claims 1 to 10 is implemented.

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