Control methods, devices, photovoltaic air conditioners and storage media for photovoltaic air conditioning

Abstract

This application relates to a control method, apparatus, and storage medium for a photovoltaic (PV) air conditioner. The PV air conditioner is an energy-saving air conditioner. The method includes: when the PV air conditioner is in an off-grid state, determining the predicted off-grid duration corresponding to the PV air conditioner, the predicted off-grid duration being used to characterize the time elapsed from the current off-grid state to the next grid connection; based on the predicted off-grid duration, determining the target participation degree corresponding to the phase change material (PCM) device in the PV air conditioner, the target participation degree being used to characterize the proportion of cooling output by the PCM device in the total cooling capacity; and controlling the PCM device and the compressor in the PV air conditioner based on the target participation degree, so that the PCM device and the compressor work together to output the total cooling capacity. This application improves the energy efficiency and energy utilization rate of the PV air conditioner.

Description

Technical Field

[0001] This application relates to the field of photovoltaic air conditioning technology, and in particular to a control method, device, photovoltaic air conditioner and storage medium for a photovoltaic air conditioner. Background Technology

[0002] Currently, photovoltaic air conditioners typically include a phase change material device to supplement the cooling capacity of the compressor within the photovoltaic air conditioner. When the photovoltaic air conditioner is in an off-grid state (i.e., not connected to the power grid), the phase change material device can work in conjunction with the compressor to release cooling capacity to meet the user's cooling needs.

[0003] However, when a phase change material (PCM) device releases cooling capacity, it is typically controlled to operate at a fixed participation rate (i.e., the proportion of cooling capacity output by the PCM device in the total cooling capacity). But in the case of short-term off-grid operation of a photovoltaic (PV) air conditioner, if the compressor continuously provides high-intensity cooling and the PCM device always provides cooling at a high participation rate, it can easily lead to excess and wasted cooling capacity. Conversely, in the case of long-term off-grid operation of a PV air conditioner, the cooling capacity of the PCM device may be depleted prematurely, causing premature reliance on the energy storage device's power to drive the compressor for cooling. This would rapidly consume limited electrical energy, leading to the PV air conditioner shutting down due to power depletion in the later stages of off-grid operation, thus failing to guarantee continuous cooling throughout the entire off-grid period. Summary of the Invention

[0004] This application provides a control method, device, photovoltaic air conditioner, and storage medium for a photovoltaic air conditioner, in order to solve the problems of wasted cooling capacity and insufficient battery life caused by the phase change material device in the photovoltaic air conditioner operating at a fixed degree of participation in the prior art, which affect the energy efficiency and energy utilization rate of the photovoltaic air conditioner.

[0005] In a first aspect, this application provides a control method for a photovoltaic air conditioner, comprising:

[0006] When the photovoltaic air conditioner is in an off-grid state, the predicted off-grid duration corresponding to the photovoltaic air conditioner is determined. The predicted off-grid duration is used to characterize the time elapsed from the current off-grid state to the next grid connection of the photovoltaic air conditioner.

[0007] Based on the predicted off-grid duration, the target participation degree corresponding to the phase change material device in the photovoltaic air conditioner is determined. The target participation degree is used to characterize the proportion of the cooling output of the phase change material device in the total cooling capacity.

[0008] Based on the target participation degree, the phase change material device and the compressor in the photovoltaic air conditioner are controlled so that the phase change material device and the compressor work together to output the total cooling capacity.

[0009] In an optional implementation, determining the predicted off-grid duration corresponding to the photovoltaic air conditioner includes:

[0010] Obtain the off-grid type corresponding to the photovoltaic air conditioner;

[0011] When the off-grid type is the first type, the object behavior information corresponding to the target object, the first weather information of the outdoor environment where the photovoltaic air conditioner is located, the first power generation power of the photovoltaic device in the photovoltaic air conditioner and the first stored power of the energy storage device in the photovoltaic air conditioner are obtained. The first type is used to characterize that the target object actively causes the photovoltaic air conditioner to go off-grid.

[0012] The object behavior information, the first weather information, the first power generation and the first stored power are input into the first prediction model corresponding to the first type, so that the first prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner;

[0013] When the off-grid type is the second type, the grid operation information corresponding to the grid, the second weather information of the outdoor environment where the photovoltaic air conditioner is located, the second power generation of the photovoltaic device, and the second stored power of the energy storage device are obtained. The second type is used to characterize the photovoltaic air conditioner being passively off-grid.

[0014] The grid operation information, the second weather information, the second power generation and the second stored power are input into the second prediction model corresponding to the second type, so that the second prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner.

[0015] In an optional implementation, determining the target participation degree corresponding to the phase change material device in the photovoltaic air conditioner based on the predicted off-grid duration includes:

[0016] The target disconnection time interval to which the predicted disconnection time belongs is determined from multiple preset disconnection time intervals;

[0017] The first association is queried based on the target churn duration interval to obtain the participation degree corresponding to the target churn duration interval. The first association stores multiple sets of correspondences between the preset churn duration interval and the participation degree. The participation degree increases as the preset churn duration interval increases.

[0018] The participation degree corresponding to the target off-grid duration interval is determined as the target participation degree corresponding to the phase change material device.

[0019] In an optional implementation, controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperate in outputting the total cooling capacity, includes:

[0020] When the target participation level is the first preset participation level, the first temperature and the target set temperature of the indoor environment where the photovoltaic air conditioner is located are obtained, and the first preset participation level is the minimum participation level of the phase change material device;

[0021] When the first difference between the first temperature and the target set temperature is greater than the first temperature threshold, the first operating frequency required for the compressor in the photovoltaic air conditioner to operate is determined according to the first preset participation degree.

[0022] The compressor is controlled to operate at the first operating frequency and the phase change material device is controlled to not operate, so that the compressor outputs the total cooling capacity;

[0023] When the first difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the first preset participation level, so that the phase change material device outputs the total cooling capacity.

[0024] In an optional implementation, controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperate in outputting the total cooling capacity, includes:

[0025] When the target participation level is the second preset participation level, the second temperature of the indoor environment where the photovoltaic air conditioner is located and the target set temperature are obtained. The second preset participation level is greater than the first preset participation level and less than the third preset participation level. The third preset participation level is the maximum participation level of the phase change material device.

[0026] When the second difference between the second temperature and the target set temperature is greater than the first temperature threshold, a second operating frequency required for the compressor to operate is determined according to the second preset participation degree, wherein the second operating frequency is less than the first operating frequency;

[0027] The compressor is controlled to operate at the second operating frequency and the phase change material device is controlled to operate at the second preset participation level, so that the compressor and the phase change material device jointly output the total cooling capacity;

[0028] When the second difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the second preset participation level, so that the phase change material device outputs the total cooling capacity.

[0029] In an optional implementation, controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperate in outputting the total cooling capacity, includes:

[0030] When the target participation level is the third preset participation level, the third temperature of the phase change material device is obtained;

[0031] When the third temperature is greater than the second temperature threshold, the first remaining power corresponding to the photovoltaic air conditioner is determined. The first remaining power consists of the first power generation of the photovoltaic device in the photovoltaic air conditioner and the third stored power of the energy storage device in the photovoltaic air conditioner.

[0032] When the first remaining power is greater than the first power threshold, a third operating frequency required for the compressor to operate is determined according to the third preset participation degree, wherein the third operating frequency is less than the second operating frequency;

[0033] The compressor is controlled to operate at the third operating frequency to output the total cooling capacity and supplement the cooling capacity of the phase change material device.

[0034] In an optional implementation, after performing the step of determining the target participation rate of the phase change material device in the photovoltaic air conditioner based on the predicted off-grid duration, the method further includes:

[0035] Obtain the second remaining power corresponding to the photovoltaic air conditioner. The second remaining power consists of the second power generation of the photovoltaic device in the photovoltaic air conditioner and the fourth stored power of the energy storage device in the photovoltaic air conditioner.

[0036] Based on the second remaining battery power, determine the first correction degree corresponding to the target participation degree;

[0037] The target engagement is updated using the first correction degree to obtain the updated target engagement.

[0038] The method of controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperate to output the total cooling capacity, includes:

[0039] Based on the updated target participation, the phase change material device and the compressor in the photovoltaic air conditioner are controlled so that the phase change material device and the compressor work together to output the total cooling capacity.

[0040] In an optional implementation, after performing the step of determining the target participation rate of the phase change material device in the photovoltaic air conditioner based on the predicted off-grid duration, the method further includes:

[0041] Based on the target participation level, the target air volume of the indoor fan in the photovoltaic air conditioner is determined, and the target air volume decreases as the target participation level increases;

[0042] When controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, the indoor fan is controlled based on the target air volume.

[0043] Secondly, this application provides a control device for a photovoltaic air conditioner, comprising:

[0044] The duration determination module is used to determine the predicted off-grid duration of the photovoltaic air conditioner when it is in an off-grid state. The predicted off-grid duration is used to characterize the time elapsed from the current off-grid state to the next grid connection of the photovoltaic air conditioner.

[0045] The participation determination module is used to determine the target participation degree of the phase change material device in the photovoltaic air conditioner based on the predicted off-grid duration. The target participation degree is used to characterize the proportion of the cooling capacity output by the phase change material device in the total cooling capacity.

[0046] The control module is used to control the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity.

[0047] Thirdly, this application provides a photovoltaic air conditioner, including: a processor and a memory, wherein the processor is used to execute a control program for the photovoltaic air conditioner stored in the memory to implement the control method for the photovoltaic air conditioner as described above.

[0048] Fourthly, this application provides a storage medium storing one or more programs that can be executed by one or more processors to implement the photovoltaic air conditioner control method described above.

[0049] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages. The control method for photovoltaic air conditioning provided in this application includes: when the photovoltaic air conditioning is in an off-grid state, determining the predicted off-grid duration corresponding to the photovoltaic air conditioning, the predicted off-grid duration being used to characterize the time elapsed from the current off-grid to the next grid connection of the photovoltaic air conditioning; determining the target participation degree corresponding to the phase change material device in the photovoltaic air conditioning based on the predicted off-grid duration, the target participation degree being used to characterize the proportion of the cooling capacity output by the phase change material device in the total cooling capacity; and controlling the phase change material device and the compressor in the photovoltaic air conditioning based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity. In this embodiment, when the photovoltaic air conditioner is in an off-grid state, the predicted off-grid time from the current off-grid to the next grid connection is predicted. Based on the predicted off-grid time, the proportion of cooling output by the phase change material device in the total cooling capacity (i.e., the target participation rate) is determined. Thus, the phase change material device and the compressor are controlled to work together based on the target participation rate, so that the phase change material device and the compressor work together to output the total cooling capacity. This avoids the phase change material device outputting cooling capacity at a fixed participation rate, which would cause waste of cooling capacity and insufficient battery life of the photovoltaic air conditioner, thereby improving the energy efficiency and energy utilization rate of the photovoltaic air conditioner. Attached Figure Description

[0050] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0053] Figure 1 This is a schematic diagram of the structure of a photovoltaic air conditioner provided in an embodiment of this application;

[0054] Figure 2 A schematic flowchart illustrating a photovoltaic air conditioner control method provided in an embodiment of this application;

[0055] Figure 3 A schematic flowchart illustrating another photovoltaic air conditioner control method provided in an embodiment of this application;

[0056] Figure 4 This is a schematic diagram of the structure of a control device for a photovoltaic air conditioner provided in an embodiment of this application;

[0057] Figure 5 This is a schematic diagram of another photovoltaic air conditioner provided in an embodiment of this application;

[0058] In the attached diagrams above:

[0059] 10. Duration determination module; 20. Participation determination module; 30. Control module;

[0060] 500. Photovoltaic air conditioner; 501. Processor; 502. Memory; 5021. Operating system; 5022. Application program; 503. User interface; 504. Network interface; 505. Bus system. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0063] Reference image, Figure 1 This is a schematic diagram of a photovoltaic air conditioner provided in an embodiment of this application. The photovoltaic air conditioner provided in this embodiment includes a photovoltaic device, an energy storage device, a phase change material (PCM) device, and an air conditioning unit. Both the photovoltaic device and the energy storage device are connected to the air conditioning unit, which is also connected to the PCM device. When the photovoltaic air conditioner is in an off-grid state, the photovoltaic device and the energy storage device work together to supply power to the air conditioning unit; that is, the photovoltaic air conditioner is an energy-saving air conditioner. The air conditioning unit is used to supply cooling capacity to the indoor environment where the air conditioning unit is located and to supply cooling capacity to the PCM device, allowing the PCM device to store cold energy. When the air conditioning unit supplies cooling capacity to the PCM device, the compressor in the air conditioning unit generates cooling capacity and outputs it to the PCM device. The PCM device is used to store the cooling capacity supplied by the air conditioning unit and release the stored cooling capacity to the indoor environment where the air conditioning unit is located.

[0064] Specifically, the air conditioning unit includes an indoor unit and a compressor. A phase change material (PCM) device is connected to both the compressor and the indoor unit. The compressor generates cooling capacity, which is then stored in the PCM device and released to the indoor unit to release the cooling capacity into the indoor environment. When releasing cooling, the PCM device delivers the released cooling capacity to the indoor unit, where it is then released into the indoor environment by the compressor.

[0065] refer to Figure 2 , Figure 2 This is a flowchart illustrating a control method for a photovoltaic air conditioner provided in an embodiment of this application. The control method for a photovoltaic air conditioner provided in this application includes the following steps:

[0066] S201: When the photovoltaic air conditioner is in an off-grid state, determine the predicted off-grid duration corresponding to the photovoltaic air conditioner.

[0067] In this embodiment, the method is applied to the photovoltaic air conditioner described above. The predicted off-grid duration is used to characterize the time elapsed from the current off-grid state to the next grid connection. Off-grid status can be understood as the photovoltaic air conditioner being disconnected from the public power grid, relying solely on the electrical energy output by the photovoltaic device and the electrical energy stored in the energy storage device to power the air conditioning unit. When the photovoltaic air conditioner is off-grid, if the photovoltaic device's power generation is sufficient, it can power the air conditioning unit alone. If the photovoltaic device's power generation is insufficient, both the photovoltaic device and the energy storage device can jointly power the air conditioning unit. If the photovoltaic device has no power generation, only the energy storage device can power the air conditioning unit. Thus, through the above-mentioned coordinated power supply method, the photovoltaic device and the energy storage device jointly power the air conditioning unit. Specific coordinated power supply methods can be found in existing technologies, and will not be further elaborated in this embodiment.

[0068] The predicted off-grid duration can be calculated by combining object behavior information, grid operation information, weather information, photovoltaic power generation, and energy storage capacity to obtain the predicted off-grid duration for photovoltaic air conditioners. During the prediction process, a prediction model for forecasting the off-grid duration can be pre-trained. After obtaining the aforementioned information, the data is input into the pre-trained model, allowing the model to output the predicted off-grid duration for the photovoltaic air conditioner.

[0069] S202: Determine the target participation level of the phase change material device based on the predicted off-grid duration.

[0070] In this embodiment, the target participation rate is used to characterize the proportion of cooling output from the phase change material device in the total cooling capacity. It quantifies the contribution of the cooling output from the phase change material device to the entire cooling process of the photovoltaic air conditioner. The higher the target participation rate, the heavier the cooling task undertaken by the phase change material device. The total cooling capacity can be understood as the total cooling output of the photovoltaic air conditioner to the indoor environment. The total cooling capacity is composed of the cooling released by the phase change material device and the cooling output of the compressor in the air conditioning unit. This total cooling capacity matches the cooling demand of the indoor environment. For example, when the set temperature of the indoor environment is 25°C, the total cooling capacity is the cooling capacity required to maintain the set temperature.

[0071] Specifically, the device can be divided into multiple preset off-grid time intervals according to actual needs. When the preset off-grid time is obtained, the preset off-grid time interval to which the preset off-grid time belongs can be determined. Based on the correspondence between the preset off-grid time interval and the participation degree, and the determined preset off-grid time interval, the target participation degree of the phase change material device can be obtained.

[0072] S203: Based on the target participation degree, control the compressor in the phase change material device and the photovoltaic air conditioner so that the phase change material device and the compressor work together to output the total cooling capacity.

[0073] In this embodiment, after determining the target participation level, the first switching timing of the phase change material device and the second switching timing of the compressor in the photovoltaic air conditioner are determined based on the target participation level. Based on the first switching timing, when the phase change material device is turned on, the phase change material device can be controlled to operate at the target participation level. Based on the second switching timing, when the compressor in the photovoltaic air conditioner is turned on, the operating frequency of the compressor in the photovoltaic air conditioner can be determined based on the target participation level, thereby controlling the compressor to operate at the determined operating frequency so that the compressor outputs the remaining cooling capacity (i.e., the total cooling capacity minus the target participation level).

[0074] It should be noted that controlling the phase change material (PCM) device to operate at the target participation level can be understood as installing a control valve on the connection pipeline between the PCM device and the indoor unit. The PCM device operates at the target participation level by controlling the opening of this control valve. There is a corresponding relationship between the opening of the control valve and the participation level of the PCM device. After determining the target participation level, this relationship can be queried to obtain the opening of the control valve. Based on this opening, the opening of the control valve can be controlled to achieve the target participation level for the PCM device.

[0075] After performing the above S202 step, the photovoltaic air conditioner control method provided in this embodiment further includes the following steps:

[0076] Obtain the second remaining electricity corresponding to the photovoltaic air conditioner;

[0077] Based on the second remaining power, determine the first correction degree corresponding to the target participation degree;

[0078] Update the target engagement using the first correction degree to obtain the updated target engagement.

[0079] Step S203 involves controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity, including:

[0080] The phase change material device and the compressor in the photovoltaic air conditioner are controlled based on the updated target parameters so that the phase change material device and the compressor work together to output the total cooling capacity.

[0081] The second remaining power generation consists of the second power generation of the photovoltaic device in the photovoltaic air conditioner and the fourth stored power of the energy storage device in the photovoltaic air conditioner (i.e., the sum of the second power generation and the fourth stored power). The second remaining power reflects the current available total power level and is used to correct the target participation rate. After obtaining the second remaining power, the correction degree corresponding to the second remaining power can be obtained based on the correspondence between the remaining power and the correction degree. This correction degree is determined as the first correction degree corresponding to the target participation rate. The target participation rate is added to the first correction degree to update the target participation rate, thus obtaining the updated target participation rate. After obtaining the updated target participation rate, the phase change material device and the compressor in the photovoltaic air conditioner can be controlled based on the updated target participation rate, so that the phase change material device and the compressor can work together to output the total cooling capacity.

[0082] Specifically, the correspondence between remaining power and correction degree can be set based on the following conditions: when the remaining power is sufficient, the participation degree of the phase change material device can be reduced, allowing the compressor to provide more cooling; when the remaining power is insufficient, the participation degree of the phase change material device can be increased. In this embodiment, after determining the target participation degree, to ensure the accuracy of controlling the phase change material device and compressor based on the target participation degree, the second remaining power corresponding to the photovoltaic air conditioner is considered to obtain the first correction degree corresponding to the target participation degree. This first correction degree is then used to update the target participation degree, avoiding the problem of wasted cooling capacity when power is sufficient or shortened runtime when power is insufficient, caused by controlling the phase change material device and compressor with the target participation degree determined by the predicted off-grid duration if the remaining power of the photovoltaic air conditioner varies significantly under the same predicted off-grid duration.

[0083] It should be noted that after obtaining the target participation rate, the predicted cooling demand of the indoor environment where the photovoltaic air conditioner is located can also be determined. Based on the predicted cooling demand, the second correction degree corresponding to the target participation rate can be determined. The target participation rate can be updated using the first correction degree and the second correction degree to obtain the updated target participation rate.

[0084] The predicted cooling demand mentioned above can be based on the acquired third-party weather information of the outdoor environment where the photovoltaic air conditioner is located, object information of the indoor environment where the photovoltaic air conditioner is located, door and window opening and closing information, and historical operating information of the photovoltaic air conditioner. This acquired information is input into a pre-trained cooling demand prediction model, allowing the model to output a second correction degree. The third-party weather information includes temperature, light intensity, and humidity; object information includes the number of people and their activity status (whether they are sitting or running); door and window opening and closing information can be understood as whether the doors and windows are currently open or closed; and historical operating information includes the historical operating frequency of the compressor, the historical participation rate of the phase change material device, and the mapping relationship between historical cooling demand. After obtaining the predicted cooling demand, the second correction degree corresponding to the predicted cooling demand can be determined based on the correspondence between the cooling demand and the correction degree. The correction degree increases as the cooling demand increases. By using the above methods to revise the target participation rate based on the predicted cooling capacity, the cooling output of the phase change material and the compressor can be accurately matched with the real-time cooling capacity demand. This avoids both over-cooling and wasting cold storage and electricity, and prevents under-cooling from causing temperature fluctuations, ultimately improving user comfort and extending the off-grid cooling duration.

[0085] After performing the above S202 step, the photovoltaic air conditioner control method provided in this embodiment further includes the following steps:

[0086] The target air volume of the indoor fan in the photovoltaic air conditioner is determined based on the target participation rate;

[0087] When controlling the compressor in a phase change material device and a photovoltaic air conditioner based on the target participation degree, the indoor fan is controlled based on the target air volume.

[0088] The target airflow decreases as the target participation level increases. After obtaining the target participation level, the airflow corresponding to the target participation level can be determined from the pre-set correspondence between participation level and airflow, thus defining the airflow corresponding to the target participation level as the target airflow for the indoor unit of the air conditioning unit. After obtaining the target airflow, when controlling the phase change material device and the compressor in the air conditioning unit based on the target participation level, the airflow of the indoor fan is controlled based on the target airflow. This allows for reducing cold loss by decreasing the airflow when the target participation level of the phase change material device is high, and increasing the airflow to accelerate cooling when the target participation level of the phase change material device is low. Through this method, in this embodiment, by considering the target participation level of the phase change material device when controlling the airflow of the indoor fan, a balance is achieved between cooling speed and cold energy retention, improving the overall energy efficiency of the photovoltaic air conditioner.

[0089] This embodiment provides a control method for a photovoltaic air conditioner. When the photovoltaic air conditioner is in an off-grid state, the method predicts the off-grid time from the current off-grid state to the next grid connection. Based on the predicted off-grid time, the method determines the proportion of cooling output by the phase change material device in the total cooling capacity (i.e., the target participation rate). The method then controls the phase change material device and the compressor to work together based on the target participation rate, so that the phase change material device and the compressor work together to output the total cooling capacity. This avoids the waste of cooling capacity and insufficient battery life of the photovoltaic air conditioner caused by the phase change material device working at a fixed participation rate, thereby improving the energy efficiency and energy utilization rate of the photovoltaic air conditioner.

[0090] refer to Figure 3 , Figure 3 This is a flowchart illustrating another photovoltaic air conditioner control method provided in an embodiment of this application. The photovoltaic air conditioner control method provided in this application includes the following steps:

[0091] S301: Obtain the off-grid type corresponding to the photovoltaic air conditioner.

[0092] S302: When the off-grid type is the first type, obtain the object behavior information corresponding to the target object, the first weather information of the outdoor environment where the photovoltaic air conditioner is located, the first power generation of the photovoltaic device in the photovoltaic air conditioner, and the first stored power of the energy storage device in the photovoltaic air conditioner.

[0093] S303: Input the object behavior information, the first weather information, the first power generation and the first stored power into the first prediction model corresponding to the first type, so that the first prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner.

[0094] S304: When the off-grid type is the second type, obtain the grid operation information corresponding to the grid, the second weather information of the outdoor environment where the photovoltaic air conditioner is located, the second power generation of the photovoltaic device, and the second energy storage capacity of the energy storage device.

[0095] S305: Input the grid operation information, the second weather information, the second power generation and the second stored power into the second prediction model corresponding to the second type, so that the second prediction model outputs the predicted off-grid duration of the photovoltaic air conditioner.

[0096] Regarding steps S301 to S305 above, the first type is used to characterize the target object actively disconnecting the photovoltaic air conditioner from the grid, and the second type is used to characterize the photovoltaic air conditioner passively disconnecting from the grid. Specifically, when a disconnection command sent by the target object through a remote control or application (such as pressing the camping mode button) is detected, the current disconnection type is determined to be the first type; when no disconnection command is detected, but a voltage or current signal interruption in the power grid is detected and a power outage information is received from the power grid service provider, the current disconnection type is determined to be the second type.

[0097] Object behavior information can be understood as object behavior information related to the first type. This includes the target object's historical off-grid duration, historical off-grid time periods, and the set indoor temperature during historical off-grid periods. This information reflects the target object's off-grid habits. The first weather information refers to the meteorological information of the outdoor environment where the photovoltaic air conditioner is located. This includes light intensity, cloud cover, outdoor temperature, and precipitation probability. The first weather information directly affects the power generation efficiency of the photovoltaic device in the photovoltaic air conditioner. By combining weather information, the predicted off-grid duration is determined to assess whether the energy reserves are sufficient. The first power generation is the real-time output power of the photovoltaic device when the photovoltaic air conditioner is actively off-grid, reflecting the photovoltaic power generation capacity of the device. The first stored energy is the remaining energy of the photovoltaic device when the photovoltaic air conditioner is actively off-grid, i.e., the initial energy reserve that the photovoltaic device can access when the photovoltaic air conditioner is actively off-grid. After determining that the off-grid type is the first type, the database can be called to obtain the object behavior information corresponding to the target object, the first weather information can be obtained through weather forecast or outdoor meteorological sensors, the first power generation of the photovoltaic device can be obtained through the power sensor in the photovoltaic device, and the first stored power can be obtained through the power sensor in the energy storage device. The above object behavior information, the first weather information, the first power generation and the first stored power are input into the first prediction model that has been trained using historical data, so that the first prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner based on the active off-grid pattern of the target object, combined with the current weather information and power reserves.

[0098] Grid operation information can be understood as operational information related to the public power grid, including power outage notices, fault repair progress, and dispatch plans. The second weather information refers to the meteorological information of the outdoor environment where the photovoltaic air conditioner is located, including sunlight intensity, cloud cover, outdoor temperature, and precipitation probability. This second weather information directly affects the power generation efficiency of the photovoltaic device. By combining weather information, the predicted off-grid duration is determined to assess the adequacy of energy reserves. The second power generation is the real-time output power of the photovoltaic device when the photovoltaic air conditioner is passively disconnected from the grid, reflecting the photovoltaic power generation capacity of the device. The first stored energy is the remaining energy of the photovoltaic device when the photovoltaic air conditioner is passively disconnected from the grid, i.e., the initial energy reserve that the photovoltaic device can access when the photovoltaic air conditioner is passively disconnected from the grid. After determining that the off-grid type is the second type, grid operation information can be obtained through the grid API interface, the second weather information can be obtained through weather forecasts or outdoor meteorological sensors, the second power generation of the photovoltaic device can be obtained through the power sensor in the photovoltaic device, and the second stored power can be obtained through the power sensor in the energy storage device. These are input into the second prediction model that has been trained using historical data. Thus, the second prediction model outputs the predicted off-grid time corresponding to the photovoltaic air conditioner based on the grid's expected emergency repair time, combined with the current weather information and energy reserves.

[0099] It should be noted that the model types of the first and second prediction models can be selected according to actual needs. In this embodiment, the specific types of the first and second prediction models are not limited. Through the above method, this embodiment classifies the off-grid types of photovoltaic air conditioners and uses different prediction models to predict the predicted off-grid duration of the photovoltaic air conditioners. This avoids the problem of large prediction errors caused by using a single prediction method without considering the off-grid triggering factors, and improves the prediction accuracy of the predicted off-grid duration of photovoltaic air conditioners.

[0100] S306: Determine the target participation level of the phase change material device based on the predicted off-grid duration.

[0101] In this embodiment, step S306, which determines the target participation degree of the phase change material device based on the predicted off-grid duration, specifically includes:

[0102] The target churn time interval to which the predicted churn time belongs is determined from multiple preset churn time intervals;

[0103] The first association is queried based on the target churn duration range to obtain the participation degree corresponding to the target churn duration range;

[0104] The participation rate corresponding to the target off-grid duration interval is determined as the target participation rate for the phase change material device.

[0105] The first association stores multiple sets of correspondences between preset churn duration intervals and participation levels, with participation increasing as the preset churn duration interval increases. The preset churn duration intervals can be set according to actual needs. In this embodiment, the method of dividing the preset churn duration intervals is not limited; the larger the preset churn duration interval, the lower the participation level. For example, multiple preset churn duration intervals include [0, 4h], (4h, 8h], and (8h, + If the preset AFLO time interval [0, 4h] corresponds to a participation rate of 20%-40%, the preset AFLO time interval (4h, 8h] corresponds to a participation rate of 50%-70%, and the preset AFLO time interval (8h, + The corresponding participation rate can be 80%-100%. The larger the preset off-grid duration range, the more necessary it is to rely on the phase change material device for cold storage to reduce the compressor's energy consumption and avoid the compressor consuming too much stored energy, thus reducing the photovoltaic air conditioner's range. Through the above method, this embodiment ensures the matching accuracy between the participation rate and the predicted off-grid duration by mapping the preset off-grid duration range to the participation rate of the phase change material device, providing a reliable basis for the subsequent coordinated control of the phase change material device and the compressor.

[0106] S307: Based on target participation, control the compressor in the phase change material device and the photovoltaic air conditioner so that the phase change material device and the compressor work together to output the total cooling capacity.

[0107] In one implementation, step S307 involves controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity. Specifically, this includes:

[0108] When the target participation level is the first preset participation level, obtain the first temperature and the target set temperature of the indoor environment where the photovoltaic air conditioner is located;

[0109] When the first difference between the first temperature and the target set temperature is greater than the first temperature threshold, the first operating frequency required for the compressor in the photovoltaic air conditioner to operate is determined according to the first preset participation degree.

[0110] The compressor is controlled to operate at a first operating frequency and the phase change material device is controlled to not operate, so that the compressor outputs the total cooling capacity;

[0111] When the first difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the first preset participation level so that the phase change material device outputs the total cooling capacity.

[0112] The first preset participation level is the minimum participation level of the phase change material device. This first preset participation level can be set according to actual needs; in this embodiment, the value of the first preset participation level is not limited. For example, the first preset participation level can be 20% to 40% as mentioned above. The indoor ambient temperature (i.e., the first temperature and the second and third temperatures below) can be obtained by a temperature sensor at the return air vent of the indoor unit in the air conditioning unit, used to determine the intensity of cooling demand. The target set temperature is the desired indoor ambient temperature set by the target object via remote control or application. The first temperature threshold is used to determine the switching timing of the compressor and the phase change material device. The first temperature threshold can be set according to actual needs; in this embodiment, the specific value of the first temperature threshold is not limited.

[0113] When the target participation level is the first preset participation level, it indicates that the photovoltaic air conditioner is temporarily off-grid. At this time, the phase change material device does not need to provide a large amount of cooling capacity, but the compressor needs to provide a large amount of cooling capacity. In order to determine the switching timing of the phase change material device, the first temperature and the target set temperature of the indoor environment where the photovoltaic air conditioner is located are acquired, and the first difference between the first temperature and the target set temperature is determined (this first difference is an absolute difference). When the first difference is greater than the first temperature threshold, it indicates that the indoor environment requires a higher cooling demand. At this time, based on the correspondence between participation level and operating frequency, the first operating frequency corresponding to the first preset participation level is determined (the first operating frequency is the maximum operating frequency for controlling the compressor to work). The compressor is then controlled to operate at the first operating frequency power, and the phase change material device is controlled to not work, so that the compressor outputs the total cooling capacity, thereby quickly cooling down to meet the cooling demand of the indoor environment. When the first difference is less than or equal to the first temperature threshold, it indicates that the current indoor ambient temperature is close to the target set temperature, and the indoor environment does not require high cooling. At this time, the compressor is controlled to stop working, and the phase change material device is controlled to work at a first preset participation rate, so that the phase change material device outputs the total cooling capacity. This reduces the compressor's energy consumption while ensuring the indoor ambient temperature, avoids excessive energy storage consumption, and ensures the photovoltaic air conditioner's endurance. Through the above methods, this embodiment ensures rapid cooling of the indoor environment and reduces the waste of cooling capacity of the phase change material device in the scenario of short-term off-grid operation of the photovoltaic air conditioner, while reducing the rate of energy storage consumption and ensuring the continuous availability of cooling capacity during the off-grid period of the photovoltaic air conditioner.

[0114] In another embodiment, step S307 controls the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity, specifically including:

[0115] When the target participation level is the second preset participation level, obtain the second temperature and the target set temperature of the indoor environment where the photovoltaic air conditioner is located;

[0116] When the second difference between the second temperature and the target set temperature is greater than the first temperature threshold, the second operating frequency required for the compressor to operate is determined according to the second preset participation degree.

[0117] The compressor is controlled to operate at a second operating frequency and the phase change material device is controlled to operate at a second preset participation level, so that the compressor and the phase change material device jointly output the total cooling capacity.

[0118] When the second difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the second preset participation level so that the phase change material device outputs the total cooling capacity.

[0119] In this embodiment, the second preset participation level is greater than the first preset participation level and less than the third preset participation level, where the third preset participation level is the maximum participation level of the phase change material device. The second operating frequency is less than the first operating frequency. The second and third preset participation levels can be set according to actual needs. In this embodiment, the values ​​of the second and third preset participation levels are not limited. For example, the second preset participation level can be 50% to 70% as mentioned above, and the third preset participation level can be 80% to 100% as mentioned above. The first temperature threshold and the target set temperature are the same as described above and will not be further elaborated here.

[0120] When the target participation level is the second preset participation level, the off-grid scenario for photovoltaic air conditioning is a medium-time off-grid scenario. At this time, the compressor and phase change material device need to jointly output total cooling capacity to the indoor environment to achieve cooling. The second temperature and the target set temperature of the indoor environment where the air conditioning unit is located are acquired, and the second difference between the second temperature and the target set temperature is determined (this second difference is an absolute difference). When the second difference is greater than the first temperature threshold, it indicates that the current indoor environment requires higher cooling demand. At this time, based on the correspondence between participation level and operating frequency, the second operating frequency corresponding to the second participation level is determined (since the phase change material device needs to jointly output cooling capacity, the second operating frequency is less than the first operating frequency). This controls the compressor to operate at the second operating frequency and the phase change material device to operate at the second preset participation level, so that the compressor and the phase change material device jointly output total cooling capacity, thereby meeting the cooling demand of the indoor environment. When the second difference is less than or equal to the first temperature threshold, it indicates that the current indoor ambient temperature is close to the target set temperature, and the indoor environment does not require high cooling. At this time, in order to save energy storage consumption, the compressor is controlled to stop working and the phase change material device continues to work at the second preset participation level, so that the phase change material device outputs the total cooling capacity, avoiding excessive energy storage consumption and ensuring the continuous operation of the photovoltaic air conditioner. Through the above methods, this embodiment ensures a balance between the cooling efficiency and the stability of the continuous operation of the indoor environment in the off-grid scenario of photovoltaic air conditioner, avoiding the shutdown of photovoltaic air conditioner caused by excessive energy storage consumption or imbalance of cooling capacity distribution, and improving the comfort of user use.

[0121] In another embodiment, step S307 involves controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor work together to output the total cooling capacity, specifically including:

[0122] When the target participation level is the third preset participation level, the third temperature of the phase change material device is obtained;

[0123] When the third temperature is greater than the second temperature threshold, the first remaining power of the photovoltaic air conditioner is determined;

[0124] When the remaining power is greater than the first power threshold, the third operating frequency required for the compressor to operate is determined according to the third preset participation degree.

[0125] The compressor is controlled to operate at the third operating frequency to output the total cooling capacity and supplement the cooling capacity of the phase change material device.

[0126] The first remaining power consists of the first power generation of the photovoltaic device in the photovoltaic air conditioner and the third stored power of the energy storage device in the photovoltaic air conditioner. The third operating frequency is lower than the second operating frequency. The third temperature can be obtained by a temperature sensor in the phase change material device. The second temperature threshold is used to determine the critical temperature at which the cooling capacity in the phase change material device is sufficient. The first power threshold is used to determine the critical power value at which the compressor should be started to supplement the cooling capacity of the phase change material device. The second temperature threshold and the first power threshold can be set as needed. In this embodiment, the specific values ​​of the second temperature threshold and the first power threshold are not limited.

[0127] When the target participation level is the third preset participation level, the off-grid scenario for photovoltaic air conditioning is a long-term off-grid scenario. In this case, the phase change material device is preferentially relied upon to provide cooling for the indoor environment. The third temperature of the phase change material device is obtained. If the third temperature is less than or equal to the second temperature threshold, the phase change material device has sufficient stored cooling capacity. The phase change material device is controlled to operate at the third preset participation level to output the total cooling capacity and control the compressor to not work, thereby ensuring the continuous operation of the photovoltaic air conditioning. If the third temperature is greater than the second temperature threshold, it indicates that the phase change material device has released a large amount of cooling capacity. At this time, the first power generation of the photovoltaic device (i.e., the actual output power) and the third stored power of the energy storage device (i.e., the current remaining power of the energy storage device) are obtained to obtain the first remaining power of the photovoltaic air conditioning through the sum of the first power generation and the third stored power. When the remaining power is greater than the first power threshold, it indicates sufficient power. At this point, based on the correspondence between participation level and operating frequency, a third operating frequency for the compressor can be determined. This allows the compressor to operate at the third operating frequency, outputting total cooling capacity and supplementing the cooling capacity of the phase change material device, thereby minimizing energy consumption and extending battery life. When the remaining power is less than or equal to the first power threshold, the phase change material device continues to operate at a third preset participation level to prevent energy depletion. Through this method, in this embodiment, under long-term off-grid scenarios for photovoltaic air conditioning, if the cooling capacity of the phase change material device is insufficient, the compressor operates at a low frequency to cool the indoor environment and supplement the cooling capacity of the phase change material device. This avoids cooling interruptions and rapid energy consumption caused by high-frequency supplemental cooling, balancing cooling demand and long battery life requirements.

[0128] This embodiment provides a control method for a photovoltaic air conditioner. When the photovoltaic air conditioner is in an off-grid state, the method predicts the off-grid time from the current off-grid state to the next grid connection. Based on the predicted off-grid time, the method determines the proportion of cooling output by the phase change material device in the total cooling capacity (i.e., the target participation rate). The method then controls the phase change material device and the compressor to work together based on the target participation rate, so that the phase change material device and the compressor work together to output the total cooling capacity. This avoids the waste of cooling capacity and insufficient battery life of the photovoltaic air conditioner caused by the phase change material device working at a fixed participation rate, thereby improving the energy efficiency and energy utilization rate of the photovoltaic air conditioner.

[0129] refer to Figure 4 , Figure 4 This is a schematic diagram of a photovoltaic air conditioner control device provided in an embodiment of this application. The photovoltaic control device provided in this embodiment includes a duration determination module 10, a participation degree determination module 20, and a control module 30. The duration determination module 10 is used to determine the predicted off-grid duration of the photovoltaic air conditioner when it is in an off-grid state. The predicted off-grid duration characterizes the time elapsed from the current off-grid state to the next grid connection. The participation degree determination module 20 is used to determine the target participation degree of the phase change material device in the photovoltaic air conditioner based on the predicted off-grid duration. The target participation degree characterizes the proportion of cooling output by the phase change material device in the total cooling capacity. The control module 30 is used to control the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor collaboratively output the total cooling capacity.

[0130] In this embodiment, the duration determination module 10 is further used for:

[0131] Obtain the off-grid type corresponding to the photovoltaic air conditioner;

[0132] When the off-grid type is the first type, the object behavior information corresponding to the target object, the first weather information of the outdoor environment where the photovoltaic air conditioner is located, the first power generation power of the photovoltaic device in the photovoltaic air conditioner and the first stored power of the energy storage device in the photovoltaic air conditioner are obtained. The first type is used to characterize that the target object actively causes the photovoltaic air conditioner to go off-grid.

[0133] The object behavior information, the first weather information, the first power generation and the first stored power are input into the first prediction model corresponding to the first type, so that the first prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner;

[0134] When the off-grid type is the second type, the grid operation information corresponding to the grid, the second weather information of the outdoor environment where the photovoltaic air conditioner is located, the second power generation of the photovoltaic device, and the second stored power of the energy storage device are obtained. The second type is used to characterize the photovoltaic air conditioner being passively off-grid.

[0135] The grid operation information, the second weather information, the second power generation and the second stored power are input into the second prediction model corresponding to the second type, so that the second prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner.

[0136] In this embodiment, the participation determination module 20 is further configured to:

[0137] The target disconnection time interval to which the predicted disconnection time belongs is determined from multiple preset disconnection time intervals;

[0138] The first association is queried based on the target churn duration interval to obtain the participation degree corresponding to the target churn duration interval. The first association stores multiple sets of correspondences between the preset churn duration interval and the participation degree. The participation degree increases as the preset churn duration interval increases.

[0139] The participation degree corresponding to the target off-grid duration interval is determined as the target participation degree corresponding to the phase change material device.

[0140] In this embodiment, the control module 30 is further configured to:

[0141] When the target participation level is the first preset participation level, the first temperature and the target set temperature of the indoor environment where the photovoltaic air conditioner is located are obtained, and the first preset participation level is the minimum participation level of the phase change material device;

[0142] When the first difference between the first temperature and the target set temperature is greater than the first temperature threshold, the first operating frequency required for the compressor in the photovoltaic air conditioner to operate is determined according to the first preset participation degree.

[0143] The compressor is controlled to operate at the first operating frequency and the phase change material device is controlled to not operate, so that the compressor outputs the total cooling capacity;

[0144] When the first difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the first preset participation level, so that the phase change material device outputs the total cooling capacity.

[0145] In this embodiment, the control module 30 is further configured to:

[0146] When the target participation level is the second preset participation level, the second temperature of the indoor environment where the photovoltaic air conditioner is located and the target set temperature are obtained. The second preset participation level is greater than the first preset participation level and less than the third preset participation level. The third preset participation level is the maximum participation level of the phase change material device.

[0147] When the second difference between the second temperature and the target set temperature is greater than the first temperature threshold, a second operating frequency required for the compressor to operate is determined according to the second preset participation degree, wherein the second operating frequency is less than the first operating frequency;

[0148] The compressor is controlled to operate at the second operating frequency and the phase change material device is controlled to operate at the second preset participation level, so that the compressor and the phase change material device jointly output the total cooling capacity;

[0149] When the second difference is less than or equal to the first temperature threshold, the compressor is controlled to stop working and the phase change material device is controlled to work at the second preset participation level, so that the phase change material device outputs the total cooling capacity.

[0150] In this embodiment, the control module 30 is further configured to:

[0151] When the target participation level is the third preset participation level, the third temperature of the phase change material device is obtained;

[0152] When the third temperature is greater than the second temperature threshold, the first remaining power corresponding to the photovoltaic air conditioner is determined. The first remaining power consists of the first power generation of the photovoltaic device in the photovoltaic air conditioner and the third stored power of the energy storage device in the photovoltaic air conditioner.

[0153] When the first remaining power is greater than the first power threshold, a third operating frequency required for the compressor to operate is determined according to the third preset participation degree, wherein the third operating frequency is less than the second operating frequency;

[0154] The compressor is controlled to operate at the third operating frequency to output the total cooling capacity and supplement the cooling capacity of the phase change material device.

[0155] In this embodiment, the participation determination module 20 is further configured to:

[0156] Obtain the second remaining power corresponding to the photovoltaic air conditioner. The second remaining power consists of the second power generation of the photovoltaic device in the photovoltaic air conditioner and the fourth stored power of the energy storage device in the photovoltaic air conditioner.

[0157] Based on the second remaining battery power, determine the first correction degree corresponding to the target participation degree;

[0158] The target engagement is updated using the first correction degree to obtain the updated target engagement.

[0159] In this embodiment, the control module 30 is further configured to:

[0160] The phase change material device and the compressor in the air conditioning unit are controlled based on the updated target participation, so that the phase change material device and the compressor work together to output the total cooling capacity.

[0161] In this embodiment, the control module 30 is further configured to:

[0162] Based on the target participation level, the target air volume of the indoor fan in the photovoltaic air conditioner is determined, and the target air volume decreases as the target participation level increases;

[0163] When controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, the indoor fan is controlled based on the target air volume.

[0164] This embodiment provides a control device for a photovoltaic air conditioner. When the photovoltaic air conditioner is in an off-grid state, it predicts the off-grid time from the current off-grid state to the next grid connection. Based on the predicted off-grid time, it determines the proportion of cooling output by the phase change material device in the total cooling capacity (i.e., the target participation rate). Based on the target participation rate, it controls the phase change material device and the compressor to work together, so that the phase change material device and the compressor work together to output the total cooling capacity. This avoids the phase change material device outputting cooling capacity at a fixed participation rate, which would cause waste of cooling capacity and insufficient battery life of the photovoltaic air conditioner, thus improving the energy efficiency and energy utilization rate of the photovoltaic air conditioner.

[0165] Figure 5 This is a schematic diagram of another photovoltaic air conditioner provided in an embodiment of this application. Figure 5 The photovoltaic air conditioner 500 shown includes: at least one processor 501, a memory 502, at least one network interface 504, and other user interfaces 503. The various components in the photovoltaic air conditioner 500 are coupled together via a bus system 505. It is understood that the bus system 505 is used to realize communication between these components. In addition to a data bus, the bus system 505 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 5 The general designated all buses as Bus System 505.

[0166] The user interface 503 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0167] It is understood that the memory 502 in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 502 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0168] In some implementations, memory 502 stores elements, executable units or data structures, or subsets thereof, or extended sets thereof: operating system 5021 and application program 5022.

[0169] The operating system 5021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 5022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 5022.

[0170] In this embodiment of the invention, the processor 501 executes the method steps provided in each method embodiment by calling the program or instructions stored in the memory 502, specifically the program or instructions stored in the application program 5022.

[0171] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 501. Processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 501 or by instructions in the form of software. The processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software units in the decoding processor. The software units may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 502. Processor 501 reads the information in memory 502 and, in conjunction with its hardware, completes the steps of the above method.

[0172] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0173] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0174] The photovoltaic air conditioner provided in this embodiment can be as follows: Figure 5 The photovoltaic air conditioner shown can perform the following functions: Figure 2 and Figure 3 All steps of the control method for photovoltaic air conditioning, thereby achieving Figure 2 and Figure 3 For details on the technical effects of the photovoltaic air conditioning control method shown, please refer to [link / reference]. Figure 2 and Figure 3 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0175] This invention also provides a storage medium (computer-readable storage medium). This storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; it may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; and it may also include combinations of the above types of memory.

[0176] When one or more programs in the storage medium can be executed by one or more processors to implement the above-mentioned control method of photovoltaic air conditioner executed on the control device side of photovoltaic air conditioner.

[0177] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0178] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0179] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A control method of a photovoltaic air conditioner, characterized by, The method comprises the steps of: determining a predicted off-grid duration corresponding to the photovoltaic air conditioner when the photovoltaic air conditioner is in an off-grid state, the predicted off-grid duration being used to represent a duration from the current off-grid to the next on-grid of the photovoltaic air conditioner; determining a target participation degree corresponding to a phase change material device in the photovoltaic air conditioner according to the predicted off-grid duration, the target participation degree being used to represent a proportion of cooling capacity output by the phase change material device in total cooling capacity; controlling the phase change material device and a compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperatively output the total cooling capacity.

2. The method of claim 1, wherein, The determination of the predicted off-grid duration corresponding to the photovoltaic air conditioner comprises: obtaining an off-grid type corresponding to the photovoltaic air conditioner; when the off-grid type is a first type, obtaining object behavior information corresponding to a target object, first weather information of an outdoor environment in which the photovoltaic air conditioner is located, a first power generation of a photovoltaic device in the photovoltaic air conditioner, and a first storage capacity of an energy storage device in the photovoltaic air conditioner, the first type being used to represent that the target object actively causes the photovoltaic air conditioner to be off-grid; inputting the object behavior information, the first weather information, the first power generation, and the first storage capacity into a first prediction model corresponding to the first type, so that the first prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner; when the off-grid type is a second type, obtaining grid operation information corresponding to a power grid, second weather information of an outdoor environment in which the photovoltaic air conditioner is located, a second power generation of the photovoltaic device, and a second storage capacity of the energy storage device, the second type being used to represent that the photovoltaic air conditioner is passively off-grid; inputting the grid operation information, the second weather information, the second power generation, and the second storage capacity into a second prediction model corresponding to the second type, so that the second prediction model outputs the predicted off-grid duration corresponding to the photovoltaic air conditioner.

3. The method of claim 1, wherein, The determination of the target participation degree corresponding to the phase change material device in the photovoltaic air conditioner according to the predicted off-grid duration comprises: determining a target off-grid duration interval to which the predicted off-grid duration belongs from a plurality of preset off-grid duration intervals; querying a first association relationship based on the target off-grid duration interval to obtain a participation degree corresponding to the target off-grid duration interval, the first association relationship storing a plurality of corresponding relationships between the preset off-grid duration intervals and the participation degrees, the participation degree increasing with the increase of the preset off-grid duration interval; determining the participation degree corresponding to the target off-grid duration interval as the target participation degree corresponding to the phase change material device.

4. The method of claim 1, wherein, The control of the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree, so that the phase change material device and the compressor cooperatively output the total cooling capacity, comprises: when the target participation degree is a first preset participation degree, obtaining a first temperature of an indoor environment in which the photovoltaic air conditioner is located and a target set temperature, the first preset participation degree being a minimum participation degree of the phase change material device; when a first difference between the first temperature and the target set temperature is greater than a first temperature threshold, determining, according to the first preset participation degree, a first operating frequency required for the compressor in the photovoltaic air conditioner to work; controlling the compressor to work at the first operating frequency and controlling the phase change material device to not work, so that the compressor outputs the total cooling capacity; when the first difference is less than or equal to the first temperature threshold, controlling the compressor to not work and controlling the phase change material device to work at the first preset participation degree, so that the phase change material device outputs the total cooling capacity.

5. The method of claim 4, wherein, The controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree to make the phase change material device and the compressor cooperatively output the total cooling capacity comprises: when the target participation degree is a second preset participation degree, obtaining a second temperature of an indoor environment in which the photovoltaic air conditioner is located and the target set temperature, the second preset participation degree being greater than the first preset participation degree and less than a third preset participation degree, the third preset participation degree being a maximum participation degree of the phase change material device; when a second difference between the second temperature and the target set temperature is greater than the first temperature threshold, determining, according to the second preset participation degree, a second operating frequency required for the compressor to work, the second operating frequency being less than the first operating frequency; controlling the compressor to work at the second operating frequency and controlling the phase change material device to work at the second preset participation degree, so that the compressor and the phase change material device cooperatively output the total cooling capacity; when the second difference is less than or equal to the first temperature threshold, controlling the compressor to not work and controlling the phase change material device to work at the second preset participation degree, so that the phase change material device outputs the total cooling capacity.

6. The method of claim 5, wherein, The controlling the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree to make the phase change material device and the compressor cooperatively output the total cooling capacity comprises: when the target participation degree is the third preset participation degree, obtaining a third temperature of the phase change material device; when the third temperature is greater than a second temperature threshold, determining a first residual electric quantity corresponding to the photovoltaic air conditioner, the first residual electric quantity being composed of a first power generation quantity of a photovoltaic device in the photovoltaic air conditioner and a third stored electric quantity of an energy storage device in the photovoltaic air conditioner; when the first residual electric quantity is greater than a first electric quantity threshold, determining, according to the third preset participation degree, a third operating frequency required for the compressor to work, the third operating frequency being less than the second operating frequency; controlling the compressor to work at the third operating frequency to output the total cooling capacity and supplement the phase change material device with cooling capacity.

7. The method of claim 1, wherein, After the step of determining the target participation degree of the phase change material device in the photovoltaic air conditioner according to the predicted off-grid duration is performed, the method further comprises: acquire a second residual electricity corresponding to the photovoltaic air conditioner, the second residual electricity being composed of a second electricity generated by a photovoltaic device in the photovoltaic air conditioner and a fourth stored electricity by a stored energy device in the photovoltaic air conditioner; determine a first correction degree corresponding to the target participation degree according to the second residual electricity; update the target participation degree by using the first correction degree to obtain an updated target participation degree; the control of the phase change material device and the compressor in the photovoltaic air conditioner based on the target participation degree to make the phase change material device and the compressor output the total cooling capacity cooperatively, comprises: the control of the phase change material device and the compressor in the photovoltaic air conditioner based on the updated target participation degree to make the phase change material device and the compressor output the total cooling capacity cooperatively.

8. The method of claim 1, wherein, after the step of determining the target participation degree of the phase change material device in the photovoltaic air conditioner according to the predicted off-grid duration, the method further comprises: determine a target air volume of an indoor fan in the photovoltaic air conditioner according to the target participation degree, the target air volume decreasing with the increase of the target participation degree; when the phase change material device and the compressor in the photovoltaic air conditioner are controlled based on the target participation degree, the indoor fan is controlled based on the target air volume.

9. A control device of a photovoltaic air conditioner, characterized by, comprise: a duration determination module configured to determine a predicted off-grid duration corresponding to the photovoltaic air conditioner when the photovoltaic air conditioner is in an off-grid state, the predicted off-grid duration being used to represent a duration from the current off-grid to the next on-grid of the photovoltaic air conditioner; a participation degree determination module configured to determine a target participation degree corresponding to a phase change material device in the photovoltaic air conditioner according to the predicted off-grid duration, the target participation degree being used to represent a proportion of cooling capacity output by the phase change material device in a total cooling capacity; a control module configured to control the phase change material device and a compressor in the photovoltaic air conditioner based on the target participation degree to make the phase change material device and the compressor output the total cooling capacity cooperatively.

10. A photovoltaic air conditioner comprising: a processor and a memory, the processor being configured to execute a control program of the photovoltaic air conditioner stored in the memory to implement the control method of the photovoltaic air conditioner according to any one of claims 1-8.

11. A storage medium, characterized by The storage medium stores one or more programs, which can be executed by one or more processors to implement the control method of the photovoltaic air conditioner according to any one of claims 1-8.

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