Control method and photovoltaic air conditioning system

Abstract

The invention provides a control method and a photovoltaic air conditioning system.The control method is applied to the photovoltaic air conditioning system.The control method comprises the steps that after a photovoltaic air conditioner is started, the current zero line current and the current line current on a three-phase circuit of a power grid are detected; according to the current zero line current and / or the current line current, whether the power grid breaks down or not is judged; and adaptively adjusting the power supply mode of the photovoltaic air conditioner according to the judgment result. According to the control method, the adaptability and stability of the photovoltaic air conditioning system in the complex electric power environment are improved, and more reliable and comfortable experience is provided for users. And the technical problem that in the prior art, a photovoltaic air conditioning system adopting a non-feed network type design cannot operate under emergency situations such as power grid power supply faults can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment control, and in particular to a control method and a photovoltaic air-conditioning system. Background Art

[0003] At present, there are three main sources of power supply required for photovoltaic air conditioners in different situations: photovoltaic system power supply alone, grid power supply alone, and hybrid power supply. Due to the instability and discontinuity of photovoltaic power generation, photovoltaic air conditioning systems in many regions adopt a non-grid-fed design. The so-called "non-grid-fed" means that the photovoltaic system is not connected to the public power grid, and the electricity generated is only used for local loads, and the excess electricity cannot be fed back to the grid. Therefore, when the photovoltaic power generation is less than the load energy consumption, it is necessary to rely on the grid to supplement the power.

[0004] However, when a power outage occurs, the power grid cannot continue to operate normally.

[0005] Therefore, the prior art needs to be further developed. Summary of the invention

[0006] The purpose of the present invention is to overcome the above technical deficiencies and provide a control method and a photovoltaic air-conditioning system to solve the technical problem that the photovoltaic air-conditioning system using a non-grid-fed design in the prior art cannot operate in emergency situations such as grid power failure.

[0007] In order to achieve the above technical purpose, according to one aspect of the present invention: a control method is provided, and the control method is applied to a photovoltaic air-conditioning system. The control method includes: after the photovoltaic air-conditioning is turned on, detecting the current neutral line current and the current line current on the three-phase circuit of the power grid; judging whether the power grid fails according to the current neutral line current and / or the current line current; and adaptively adjusting the power supply mode of the photovoltaic air-conditioning according to the judgment result.

[0008] Furthermore, the method for adaptively adjusting the power supply mode of the photovoltaic air conditioner according to the judgment result includes: if the power grid fails, adjusting the power supply mode of the photovoltaic air conditioner to the emergency power supply mode; if the power grid does not fail, judging whether the photovoltaic device is generating electricity normally, and adjusting the power supply mode of the photovoltaic air conditioner according to the judgment result.

[0009] Furthermore, the method for determining whether a power grid fault occurs includes: if the current neutral line current is less than a first preset value and / or the current line current is less than a second preset value, determining that a power grid fault occurs; if the current neutral line current is greater than or equal to the first preset value, and the current line current is greater than or equal to the second preset value, determining that the power grid does not fail; wherein the first preset value is less than the second preset value.

[0010] Furthermore, the control method also includes: if the power supply mode of the photovoltaic air conditioner is adjusted to the emergency power supply mode, the current energy consumption power of the photovoltaic air conditioner and the current power generation power of the photovoltaic device are obtained; if the current energy consumption power of the photovoltaic air conditioner is greater than the current power generation power of the photovoltaic device, the operation mode of the photovoltaic air conditioner is switched to the intermittent drive mode; if the current energy consumption power of the photovoltaic air conditioner is less than or equal to the current power generation power of the photovoltaic device, at least one operation plan of the photovoltaic air conditioner is generated according to the historical power generation data of the photovoltaic device and the current power generation data of the photovoltaic device, and at least one operation plan of the photovoltaic air conditioner is sent to the user end for the user to select; the photovoltaic air conditioner operates according to the user's selection.

[0011] Furthermore, if the current energy consumption of the photovoltaic air conditioner is greater than the current power generation of the photovoltaic device, the method of switching the operating mode of the photovoltaic air conditioner to the intermittent driving mode includes: controlling the photovoltaic air conditioner to switch to a standby state, and controlling the power generated by the photovoltaic device to be immediately transmitted to the photovoltaic air conditioner for storage; if the stored electric energy meets the energy consumption of the photovoltaic air conditioner during operation, controlling the photovoltaic air conditioner to switch to an operating state; if the stored electric energy cannot meet the energy consumption of the photovoltaic air conditioner during operation, controlling the photovoltaic air conditioner to maintain or switch to a standby state.

[0012] Furthermore, the control method also includes: if the current energy consumption power of the photovoltaic air conditioner is greater than the current power generation power of the photovoltaic device, adjusting the output current and output voltage of the photovoltaic device to maximize the power generation power of the photovoltaic device.

[0013] Furthermore, if no failure occurs in the power grid, the method for judging whether the photovoltaic device is generating electricity normally and adjusting the power supply mode of the photovoltaic air conditioner according to the judgment result includes: if the photovoltaic device cannot generate electricity normally, adjusting the power supply mode of the photovoltaic air conditioner to the power supply mode of the power grid; if the photovoltaic device is generating electricity normally, obtaining the current energy consumption power of the photovoltaic air conditioner and the current power generation power of the photovoltaic device; if the current energy consumption power of the photovoltaic air conditioner is less than or equal to the current power generation power of the photovoltaic device, adjusting the power supply mode of the photovoltaic air conditioner to the photovoltaic power supply mode; if the current energy consumption power of the photovoltaic air conditioner is greater than the current power generation power of the photovoltaic device, adjusting the power supply mode of the photovoltaic air conditioner to the hybrid power supply mode; and adjusting the output current and output voltage of the photovoltaic device so that the power generation power of the photovoltaic device reaches the maximum value.

[0014] Furthermore, a method for determining whether a photovoltaic device is generating electricity normally includes: obtaining a current output current of the photovoltaic device and a current value corresponding to a current outdoor light intensity; if the current output current of the photovoltaic device is less than the current value corresponding to the current outdoor light intensity, the photovoltaic device cannot generate electricity normally; if the current output current of the photovoltaic device is greater than or equal to the current value corresponding to the current outdoor light intensity, and the current output current of the photovoltaic device is less than a third preset value, the photovoltaic device generates electricity normally; wherein the current value corresponding to the current outdoor light intensity is less than the third preset value.

[0015] Furthermore, the photovoltaic air-conditioning system also includes a lighting energy storage device and a lighting device, and the lighting energy storage device is connected to the lighting device; the control method also includes: if a power grid fails, obtaining the indoor light intensity; if the indoor light intensity is less than a fourth preset value, controlling the lighting energy storage device to discharge and turning on the lighting device; if the indoor light intensity is greater than or equal to the fourth preset value, controlling the lighting energy storage device to be in a standby state and the lighting device to be in an off state.

[0016] Furthermore, the photovoltaic air-conditioning system also includes: a DC bus, which is connected to the lighting energy storage device. The control method also includes: if the photovoltaic air-conditioning is turned off, the DC bus releases electrical energy and determines whether the lighting energy storage device is fully charged; if the lighting energy storage device is not fully charged, the electrical energy released by the DC bus is transmitted to the lighting energy storage device to charge the lighting energy storage device; if the lighting energy storage device is fully charged, the electrical energy released by the DC bus is consumed by other components.

[0017] According to another aspect of the present invention: a photovoltaic air-conditioning system is provided, which is applicable to the above-mentioned control method, and the photovoltaic air-conditioning system comprises: a photovoltaic air-conditioning; a photovoltaic device and a grid power supply device, both of which are connected to the photovoltaic air-conditioning, and both of which are used to provide electrical energy for the photovoltaic air-conditioning; a control device, which is used to detect the current neutral line current and the current line current on the three-phase circuit of the grid power supply device; judge whether the grid power supply device fails according to the current neutral line current and / or the current line current; and adaptively adjust the power supply mode of the photovoltaic air-conditioning according to the judgment result.

[0018] Furthermore, the control device includes: a fault detection module for detecting the current neutral line current and the current line current on the three-phase circuit of the power supply device of the power grid; judging whether a fault occurs in the power supply device of the power grid according to the current neutral line current and / or the current line current; a control module connected to the fault detection module, and the control module is used to obtain the judgment result of the fault detection module, so as to adaptively adjust the power supply mode of the photovoltaic air conditioner according to the judgment result.

[0019] Furthermore, the photovoltaic air-conditioning system also includes: a display device, the display device is connected to the control device, the control device is used to send the operating status of the photovoltaic air-conditioning system to the display device, and the display device is used to display the operating status of the photovoltaic air-conditioning system.

[0020] Furthermore, the photovoltaic air-conditioning system also includes: an outdoor light detection device, which is arranged outdoors and is located on one side of the photovoltaic panel of the photovoltaic device; the outdoor light detection device is used to detect the outdoor light intensity; the outdoor light detection device is connected to the control device, and the outdoor light detection device converts the detected outdoor light intensity into a current signal and sends it to the control device.

[0021] Furthermore, the photovoltaic air conditioner includes: a drive module and a photovoltaic air conditioner unit, the drive module is connected to the photovoltaic air conditioner unit, and the drive module is used to drive the photovoltaic air conditioner unit to move; the drive module is connected to the control device, and the control device is used to control the movement of the drive module.

[0022] Furthermore, the photovoltaic air-conditioning system is suitable for the above-mentioned control method, and the photovoltaic air-conditioning system also includes: a lighting device, which is used to illuminate the room; a control device connected to the lighting device, which is used to control the start and stop of the lighting device; a lighting energy storage device, which is connected to the lighting device, which is used to provide electrical energy to the lighting device; the lighting energy storage device is connected to the control device, which is used to control the charging and discharging of the lighting energy storage device.

[0023] Furthermore, the photovoltaic air-conditioning system is suitable for the above-mentioned control method, and the photovoltaic air-conditioning system also includes: an indoor light detection device, which is used to detect the light intensity in the room; the indoor light detection device is connected to the control device, and the indoor light detection device sends the detected result to the control device; wherein the control device controls the start and stop of the lighting device and whether the lighting energy storage device enters the discharge state according to the detection result of the indoor light detection device and the power supply mode of the photovoltaic air conditioner.

[0024] Furthermore, the photovoltaic air-conditioning system is suitable for the above-mentioned control method, and the photovoltaic air-conditioning system also includes: a DC bus, the DC bus is used to transmit DC power, and the DC bus is connected to the lighting energy storage device; wherein the control device is used to determine whether the lighting energy storage device is fully charged; when the photovoltaic air-conditioning is turned off and the lighting energy storage device is not fully charged, the control device controls the lighting energy storage device to enter a charging state, so that the electric energy released by the DC bus is transmitted to the lighting energy storage device.

[0025] Beneficial effects:

[0026] By applying the technical solution of the present invention, the control method provided by the present invention detects the current on the zero line of the three-phase circuit of the power grid, i.e., the zero line current and the line current, in real time after the photovoltaic air conditioner is turned on, i.e., after the photovoltaic air conditioner starts to operate; then, by analyzing the current zero line current and / or line current obtained, it is determined whether the power grid fails, and the power supply mode of the photovoltaic air conditioner is adaptively adjusted according to the determination result. With such a control method, by real-time monitoring of the zero line current and the line current on the three-phase circuit of the power grid, abnormal conditions in the power grid, such as short circuit, overload, ground fault, etc., can be discovered in time. Once a power grid fault is detected, the system can immediately take corresponding measures to avoid the photovoltaic air conditioner from being unable to operate due to the power grid fault. This mechanism ensures that the photovoltaic air conditioner continues to work stably for a certain period of time, thereby significantly improving its operating reliability and stability, and further improving product performance. According to the current state of the power grid, the system can adaptively adjust the power supply mode of the photovoltaic air conditioner, optimize energy utilization, and improve energy utilization efficiency while ensuring the normal operation of the photovoltaic air conditioner. This dynamic adjustment not only improves the responsiveness of the system, but also enables seamless switching to other power supply modes when the power grid fails, maximally ensuring that the user's comfort is not affected, thereby improving the user experience. In addition, by real-time monitoring and analysis of current data, the system can take preventive measures in time to reduce the occurrence of safety accidents. The ability to monitor grid current data in real time enables the system to detect abnormal conditions in the grid early. The control method of the present invention improves the adaptability and stability of the photovoltaic air-conditioning system in a complex power environment, providing users with a more reliable and comfortable experience. It can also effectively solve the technical problem that the photovoltaic air-conditioning system using a non-grid-fed design in the prior art cannot operate in emergency situations such as grid power failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic flow chart showing an embodiment of a control method of the present invention is shown;

[0028] Figure 2 A schematic structural diagram of an embodiment of the photovoltaic air conditioning system of the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 1. Photovoltaic air conditioner; 11. Drive module; 12. Photovoltaic air conditioner unit; 2. Photovoltaic device; 3. Grid power supply device; 4. Control device; 41. Fault detection module; 42. Control module; 5. Display device; 6. Outdoor light detection device; 7. Lighting device; 8. Lighting energy storage device; 9. DC bus; 10. Indoor light detection device. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0032] See also Figure 1 As shown, according to an embodiment of the present invention, the present invention provides a control method, which is applied to a photovoltaic air conditioning system, and the control method includes:

[0033] S11, after the photovoltaic air conditioner 1 is turned on, the current neutral line current and the current line current on the three-phase circuit of the power grid are detected.

[0034] S12, determining whether a grid fault occurs according to the current neutral line current and / or the current line current.

[0035] S13, adaptively adjusting the power supply mode of the photovoltaic air conditioner 1 according to the judgment result.

[0036] It can be seen that the control method provided by the present invention detects the current on the neutral line (i.e., the neutral line current) and the line current on the three-phase circuit of the power grid in real time after the photovoltaic air conditioner 1 is turned on (i.e., after the photovoltaic air conditioner 1 starts to operate); then, by analyzing the current neutral line current and / or line current obtained, it is determined whether the power grid has failed, and the power supply mode of the photovoltaic air conditioner 1 is adaptively adjusted according to the determination result. With such a control method, by real-time monitoring of the neutral line current and line current on the three-phase circuit of the power grid, abnormal conditions in the power grid, such as short circuit, overload, ground fault, etc., can be discovered in time. Once a power grid fault is detected, the system can immediately take corresponding measures to avoid the photovoltaic air conditioner from being unable to operate due to a power grid fault. This mechanism ensures that the photovoltaic air conditioner continues to work stably for a certain period of time, thereby significantly improving its operating reliability and stability, and further improving product performance. According to the current state of the power grid, the system can adaptively adjust the power supply mode of the photovoltaic air conditioner 1, while ensuring the normal operation of the photovoltaic air conditioner 1, optimizing energy utilization and improving energy utilization efficiency. This dynamic adjustment not only improves the responsiveness of the system, but also enables seamless switching to other power supply modes in the event of a power grid failure, ensuring that the user's comfort is not affected to the greatest extent possible, thereby improving the user experience. In addition, by real-time monitoring and analysis of current data, the system can take preventive measures in a timely manner to reduce the occurrence of safety accidents. The ability to monitor grid current data in real time enables the system to detect abnormal conditions in the grid early. The control method of the present invention improves the adaptability and stability of the photovoltaic air-conditioning system in a complex power environment, providing users with a more reliable and comfortable experience. It can also effectively solve the technical problem that the photovoltaic air-conditioning system using a non-grid-fed design in the prior art cannot operate in emergency situations such as grid power supply failures.

[0037] Optionally, the photovoltaic air conditioning system adopts a non-grid-fed design.

[0038] Specifically, the method of adaptively adjusting the power supply mode of the photovoltaic air conditioner 1 according to the judgment result includes: if the power grid fails, adjusting the power supply mode of the photovoltaic air conditioner 1 to the emergency power supply mode; if the power grid does not fail, judging whether the photovoltaic device 2 is generating electricity normally, and adjusting the power supply mode of the photovoltaic air conditioner 1 according to the judgment result. With such a control method, since the power generation of the photovoltaic device 2 has the characteristics of instability and discontinuity, if it is determined that the power grid fails, the power supply mode of the photovoltaic air conditioner 1 is adjusted to the emergency power supply mode, which can effectively extend the operation time of the photovoltaic air conditioner, thereby improving the user experience. If it is determined that the power grid does not fail, adjusting the power supply mode of the photovoltaic air conditioner 1 according to the power generation of the photovoltaic device can effectively optimize energy utilization, thereby improving energy utilization, reducing electricity costs, and achieving green energy saving. This control method enhances the stability and sustainability of the system, ensuring that efficient operation can be maintained under different circumstances.

[0039] Among them, the emergency power supply mode means that when the power grid fails, the photovoltaic air conditioning system can automatically switch to a power supply mode that can extend the operation time of the photovoltaic air conditioning. For example, when the power grid is out of power, the photovoltaic air conditioning system automatically switches to the emergency power supply mode.

[0040] Specifically, the method for determining whether a power grid fault occurs includes: if the current zero-line current is less than a first preset value and / or the current line current is less than a second preset value, it is determined that a power grid fault occurs; if the current zero-line current is greater than or equal to the first preset value, and the current line current is greater than or equal to the second preset value, it is determined that the power grid has not failed; wherein the first preset value is less than the second preset value. By adopting such a control method, by real-time monitoring of the zero-line current and the line current, the system can quickly and accurately determine the operating status of the power grid, thereby responding to fault conditions in a timely manner and improving the fault detection capability of the system. At the same time, accurate judgment of the power grid status helps to adjust the power supply mode of the photovoltaic air conditioner 1, ensuring that energy can be effectively used in both normal and fault conditions, and reducing operating costs. In addition, by timely discovering and responding to power grid faults, users will enjoy more stable and reliable services when using the photovoltaic air conditioning system.

[0041] Among them, the first preset value refers to a threshold value less than the normal neutral line current. When the detected neutral line current is lower than this value, it may indicate that the grid voltage is abnormal and it can be determined that the grid is faulty. The second preset value refers to a threshold value less than the normal line current. When the detected current is lower than this value, it may indicate that the current reflux is abnormal and may cause a grid fault. It can be understood that the first preset value is the first preset current value and the second preset value is the second preset current value.

[0042] When the power grid operates normally, the current on the neutral line detected on the circuit board will be smaller than the line current. Therefore, when setting the first preset value and the second preset value, the first preset value should be smaller than the second preset value.

[0043] Optionally, after obtaining the current neutral line current, the current neutral line current is compared with a first preset value; at the same time, after obtaining the current line current, the current line current is compared with a second preset value. When one of the current neutral line current and the current line current is less than the corresponding preset value, it is determined that the power grid is faulty.

[0044] Specifically, the control method also includes: if the power supply mode of the photovoltaic air conditioner 1 is adjusted to the emergency power supply mode, the current energy consumption power of the photovoltaic air conditioner 1 and the current power generation power of the photovoltaic device 2 are obtained; if the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, the operation mode of the photovoltaic air conditioner 1 is switched to the intermittent drive mode; if the current energy consumption power of the photovoltaic air conditioner 1 is less than or equal to the current power generation power of the photovoltaic device 2, at least one operation plan of the photovoltaic air conditioner 1 is generated according to the historical power generation data of the photovoltaic device 2 and the current power generation data of the photovoltaic device 2, and at least one operation plan of the photovoltaic air conditioner 1 is sent to the user end for the user to select; the photovoltaic air conditioner 1 operates according to the user's selection. With such a control method, when the photovoltaic air conditioner 1 switches to the emergency power supply mode, the system can dynamically adjust according to the power generation capacity of the photovoltaic device 2 and the energy consumption status of the photovoltaic air conditioner 1 to ensure the normal operation of the air conditioner within a certain period of time. The stability and reliability of the system are improved. When the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation of the photovoltaic device 2, the operation mode of the photovoltaic air conditioner 1 is switched to the intermittent driving mode, which can ensure that the air conditioner can still operate under limited power supply, thereby maintaining the appropriate temperature of the target area and improving the comfort of the user. When the current energy consumption of the photovoltaic air conditioner 1 is less than the current power generation of the photovoltaic device 2, at least one operation plan of the photovoltaic air conditioner 1 is generated according to the historical power generation data of the photovoltaic device 2 and the current power generation data of the photovoltaic device 2, and at least one operation plan of the photovoltaic air conditioner 1 is sent to the user end for the user to choose. It allows users to choose a suitable operation mode according to their own needs. This flexibility of choice can indeed increase the user's favorability and satisfaction with the product. In addition, the system automatically generates at least one operation plan of the photovoltaic air conditioner 1 based on the historical power generation data of the photovoltaic device 2 and the current power generation data of the photovoltaic device 2, further improving the intelligence level of the system.

[0045] The intermittent driving mode mentioned above can be understood as the photovoltaic air conditioner operating normally for a period of time, and temporarily stopping the operation of the photovoltaic air conditioner (the photovoltaic air conditioner is in standby mode) for another period of time. The start and stop time intervals are dynamically adjusted according to the power generation of the photovoltaic device and the energy consumption of the photovoltaic air conditioner.

[0046] Optionally, if the current energy consumption of the photovoltaic air conditioner 1 is less than the current power generation of the photovoltaic device 2, the system uses the historical power generation data and current power generation data of the photovoltaic device 2 to build a model (such as linear regression, machine learning algorithm, etc.) to predict future power generation capacity, and then generates multiple optimal operation plans for the photovoltaic air conditioner, and sends them to the user end for the user to choose. After the user has made his selection, the photovoltaic air conditioner operates according to the operation plan selected by the user.

[0047] In addition, in addition to using the historical power generation data and current power generation data of the photovoltaic device 2, the system can also learn from the user's historical usage habit data and provide personalized operation plans. This personalized service can not only enhance the user experience, but also improve the user's stickiness and loyalty to the product.

[0048] Specifically, if the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation of the photovoltaic device 2, the method of switching the operation mode of the photovoltaic air conditioner 1 to the intermittent driving mode includes: controlling the photovoltaic air conditioner 1 to switch to the standby state, and controlling the power generated by the photovoltaic device 2 to be immediately transmitted to the photovoltaic air conditioner 1 for storage; if the stored power meets the energy consumption of the photovoltaic air conditioner 1 during operation, controlling the photovoltaic air conditioner 1 to switch to the operation state; if the stored power cannot meet the energy consumption of the photovoltaic air conditioner 1 during operation, controlling the photovoltaic air conditioner 1 to maintain or switch to the standby state. With such a control method, when the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation of the photovoltaic device 2, the photovoltaic air conditioner 1 is first controlled to switch to the standby state, and the power generated by the photovoltaic device 2 is immediately transmitted to the photovoltaic air conditioner 1 for storage (that is, the photovoltaic device 2 is controlled to provide power to the photovoltaic air conditioner 1 in an instant transmission mode, and then the photovoltaic air conditioner 1 first stores the power transmitted by the photovoltaic device 2); and then, when the power generation of the photovoltaic device 2 cannot meet the normal operation of the photovoltaic air conditioner 1, the power can be stored first, thereby ensuring the maximum utilization of photovoltaic power and reducing waste. And further ensure the efficient operation of the system and the comfort of users.

[0049] Optionally, when the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation of the photovoltaic device 2, the photovoltaic air conditioner 1 is first controlled to switch to the standby state, and the power generated by the photovoltaic device 2 is controlled to be immediately transmitted to the photovoltaic air conditioner 1 for storage (that is, the photovoltaic device 2 is controlled to provide power to the photovoltaic air conditioner 1 in an instant transmission mode, and then the photovoltaic air conditioner 1 first stores the power transmitted by the photovoltaic device 2); then the stored power is obtained in real time, and the current stored power is compared with the power consumption detected before the photovoltaic air conditioner 1 stops running. When the current stored power can meet the power consumption of the photovoltaic air conditioner 1 during operation, the photovoltaic air conditioner is controlled to switch from the standby state to the running state. During the operation process, the photovoltaic device 2 will continue to transmit power to the photovoltaic air conditioner, and the photovoltaic air conditioner 1 will continue to store the power transmitted by the photovoltaic device 2. At the same time, during the operation process, if the current stored power cannot meet the power consumption of the photovoltaic air conditioner 1 during operation, the photovoltaic air conditioner is controlled to switch from the running state to the standby state, waiting for more power storage.

[0050] Optionally, the photovoltaic air conditioner 1 has an energy storage module, and the electricity generated by the photovoltaic device 2 is directly transmitted to the energy storage module for storage.

[0051] Specifically, the control method also includes: if the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, the output current and output voltage of the photovoltaic device 2 are adjusted so that the power generation power of the photovoltaic device 2 reaches the maximum value. With such a control method, the MPPT algorithm is used to ensure that the photovoltaic device 2 always operates at the maximum power point, thereby maximizing the power generation efficiency. By optimizing the power generation power of the photovoltaic device 2, it is ensured that as much power as possible can be generated when the photovoltaic power is insufficient, thereby improving the overall energy efficiency of the system. Avoid the waste of power due to low power generation efficiency and ensure that each unit of photovoltaic power can be effectively utilized.

[0052] Optionally, if the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, the photovoltaic device 2 uses a photovoltaic maximum power point tracking (MPPT) algorithm to dynamically adjust the output current and output voltage of the photovoltaic system, so that the photovoltaic device 2 finds the output current value and output voltage value corresponding to the maximum power generation power of the photovoltaic device 2 (that is, the photovoltaic device 2 performs optimal current and voltage search), so that the power generation power of the photovoltaic device 2 reaches the maximum value.

[0053] Specifically, if the power grid has not failed, the method for judging whether the photovoltaic device 2 is generating electricity normally, and adjusting the power supply mode of the photovoltaic air conditioner 1 according to the judgment result, includes: if the photovoltaic device 2 cannot generate electricity normally, adjusting the power supply mode of the photovoltaic air conditioner 1 to the power supply mode of the power grid; if the photovoltaic device 2 generates electricity normally, obtaining the current energy consumption power of the photovoltaic air conditioner 1 and the current power generation power of the photovoltaic device 2; if the current energy consumption power of the photovoltaic air conditioner 1 is less than or equal to the current power generation power of the photovoltaic device 2, adjusting the power supply mode of the photovoltaic air conditioner 1 to the photovoltaic power supply mode; if the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, adjusting the power supply mode of the photovoltaic air conditioner 1 to the hybrid power supply mode; and adjusting the output current and output voltage of the photovoltaic device 2 so that the power generation power of the photovoltaic device 2 reaches the maximum value. By adopting such a control method, the state of the photovoltaic device 2 is monitored in real time, and power generation anomalies are discovered in time, ensuring that the system can switch to the power supply mode of the power grid in time when the photovoltaic device 2 fails, and avoiding system shutdown. When the photovoltaic device 2 cannot generate electricity normally, it automatically switches to the power supply mode of the power grid, ensuring that the photovoltaic air conditioner 1 can operate normally and the user's comfort is not affected. When the photovoltaic device 2 is generating electricity normally and the power generation capacity is sufficient, photovoltaic power is used first to reduce dependence on the power grid and save electricity costs. When the photovoltaic power is insufficient, a hybrid power supply mode is adopted to ensure the continuous operation of the system while maximizing the use of available photovoltaic power. In addition, when the current energy consumption of the photovoltaic air conditioner 1 is greater than the current power generation capacity of the photovoltaic device 2, the output current and voltage of the photovoltaic device 2 are dynamically adjusted through the MPPT algorithm so that the photovoltaic device 2 operates at the maximum power point, which can effectively improve the power generation efficiency of the photovoltaic device 2 and maximize the use of photovoltaic power. By maximizing the use of photovoltaic power, the dependence on grid power is reduced and the operating cost is reduced.

[0054] Among them, the grid power supply mode means that the photovoltaic air conditioner 1 completely relies on the power provided by the grid for operation. The photovoltaic power supply mode means that the photovoltaic air conditioner 1 completely relies on the power generated by the photovoltaic device 2 for operation, and does not use the power provided by the grid. The hybrid power supply mode means that the photovoltaic air conditioner 1 uses both the power generated by the photovoltaic device 2 and the power provided by the grid for operation.

[0055] Specifically, the method for judging whether the photovoltaic device 2 is generating electricity normally includes: obtaining the current output current of the photovoltaic device 2 and the current value corresponding to the current outdoor light intensity; if the current output current of the photovoltaic device 2 is less than the current value corresponding to the current outdoor light intensity, the photovoltaic device 2 cannot generate electricity normally; if the current output current of the photovoltaic device 2 is greater than or equal to the current value corresponding to the current outdoor light intensity, and the current output current of the photovoltaic device 2 is less than the third preset value, the photovoltaic device 2 generates electricity normally. Among them, the current value corresponding to the current outdoor light intensity is less than the third preset value. By adopting such a control method, by comparing the current output current of the photovoltaic device 2 with the current value corresponding to the outdoor light intensity, the operating condition of the photovoltaic device 2 can be accurately judged, and the fault problem of the photovoltaic device 2 can be discovered and handled in time. Thereby ensuring that the photovoltaic air conditioner can operate normally while maximizing the use of photovoltaic power. In addition, by real-time monitoring of current data, the operation and maintenance costs are reduced, and large-scale maintenance and downtime are avoided.

[0056] Optionally, the photovoltaic air conditioning system includes an outdoor light detection device 6, which can detect the outdoor light intensity and feed back the detected light intensity signal in the form of current, so that it can obtain the current value corresponding to the current outdoor light intensity.

[0057] Among them, in theory, the light intensity detected by the outdoor light detection device 6 is the same as the light intensity received by the photovoltaic device 2, but in fact, the light intensity detected by the outdoor light detection device 6 is slightly less than the light intensity received by the photovoltaic device 2. If the current output current of the photovoltaic device 2 is less than the current value corresponding to the current outdoor light intensity, it proves that the photovoltaic device 2 cannot generate electricity normally. If the current output current of the photovoltaic device 2 is much greater than the current value corresponding to the current outdoor light intensity, it is possible that the outdoor light detection device 6 is faulty. Therefore, in order to ensure the accuracy of the judgment and to be able to judge whether the outdoor light detection device 6 is faulty, a third preset value is set. It can be understood that the third preset value is the third preset current value.

[0058] Furthermore, if the current output current of the photovoltaic device 2 is greater than the third preset value, it indicates that the outdoor light detection device 6 fails and needs to be checked.

[0059] The third preset value is a reasonable error range, which is used to determine whether the current value corresponding to the current outdoor light intensity is accurate.

[0060] Specifically, the photovoltaic air conditioning system also includes a lighting energy storage device 8 and a lighting device 7, and the lighting energy storage device 8 is connected to the lighting device 7; the control method also includes: if the power grid fails, the indoor light intensity is obtained; if the indoor light intensity is less than the fourth preset value, the lighting energy storage device 8 is controlled to discharge and the lighting device 7 is turned on; if the indoor light intensity is greater than or equal to the fourth preset value, the lighting energy storage device 8 is controlled to be in a standby state and the lighting device 7 is in a closed state. With such a control method, in the event of a power grid failure, the system determines whether the lighting needs to be turned on by monitoring the indoor light intensity, ensuring that lighting can still be provided when the light is insufficient to meet the basic needs of users. By controlling whether the lighting energy storage device 8 is discharged or not, the system can flexibly use energy storage according to actual needs, avoid unnecessary energy waste, and improve overall energy utilization. In addition, the system can automatically monitor and respond to environmental changes, reflecting certain intelligent communication functions, reducing manual intervention, and improving user experience.

[0061] The fourth preset value refers to a specific light intensity threshold value. This threshold value is mainly used to determine whether the indoor lighting conditions meet specific requirements, thereby determining the operating status of the lighting energy storage device 8 and the lighting device 7. It can be understood that the fourth preset value is a preset light intensity value.

[0062] Optionally, the first preset value, the second preset value, the third preset value and the fourth preset value can be set according to actual conditions.

[0063] Specifically, the photovoltaic air conditioning system also includes: a DC bus 9, which is connected to the lighting energy storage device 8, and the control method also includes: if the photovoltaic air conditioner 1 is turned off, the DC bus 9 releases the electric energy, and determines whether the lighting energy storage device 8 is fully charged; if the lighting energy storage device 8 is not fully charged, the electric energy released by the DC bus 9 is transmitted to the lighting energy storage device 8 to charge the lighting energy storage device 8; if the lighting energy storage device 8 is fully charged, the electric energy released by the DC bus 9 is consumed by other components. With such a control method, by monitoring the power state of the lighting energy storage device 8, the system can intelligently control the release and charging of electric energy, thereby achieving more efficient energy management and improving the energy efficiency of the overall system. When the photovoltaic air conditioner 1 is turned off, the system can automatically and effectively transmit the electric energy released by the DC bus 9 to the lighting energy storage device 8, which can improve the utilization rate of energy. In addition, if the lighting energy storage device 8 is in a fully charged state, the electric energy released by the DC bus 9 is consumed by other components, which can avoid overcharging and maintain the optimal power state of the lighting energy storage device 8, thereby extending its service life and reducing the cost of frequent replacement.

[0064] Among them, other components refer to components other than the lighting energy storage device 8 that can consume the electric energy released by the DC bus 9 .

[0065] Optionally, in order to ensure that the DC bus is not over-voltage, when the photovoltaic air conditioner is shut down, the DC bus 9 releases electric energy, thereby effectively protecting the circuits and components of the photovoltaic air conditioning system.

[0066] The present invention provides a photovoltaic air conditioning system, which is applicable to the control method of the above embodiment. Figure 2 As shown, the photovoltaic air conditioning system includes: a photovoltaic air conditioning 1, a photovoltaic device 2, a power grid power supply device 3 and a control device 4. The photovoltaic device 2 and the power grid power supply device 3 are both connected to the photovoltaic air conditioning 1, and the photovoltaic device 2 and the power grid power supply device 3 are used to provide electrical energy for the photovoltaic air conditioning 1; the control device 4 is used to detect the current neutral current and the current line current on the three-phase circuit of the power grid power supply device 3; according to the current neutral current and / or the current line current, it is judged whether the power grid power supply device 3 fails; and according to the judgment result, the power supply mode of the photovoltaic air conditioning 1 is adaptively adjusted. With such a structural setting, the control device can monitor the neutral current and line current on the three-phase circuit of the power grid in real time, and then can timely detect abnormal conditions in the power grid (i.e., the power grid power supply device 3), such as short circuit, overload, ground fault, etc. Once a power grid fault is detected, the system can immediately take corresponding measures, such as switching to a backup power supply, to avoid the photovoltaic air conditioning 1 from failing to operate normally due to a power grid fault. This mechanism ensures that the photovoltaic air conditioning 1 continues to work stably for a certain period of time, thereby significantly improving its operating reliability and stability, and further improving product performance. According to the current state of the power supply device 3 of the power grid, the system can adaptively adjust the power supply mode of the photovoltaic air conditioner 1, optimize energy utilization and improve energy utilization efficiency while ensuring the normal operation of the photovoltaic air conditioner 1. This dynamic adjustment not only improves the responsiveness of the system, but also enables seamless switching to other power supply modes when the power grid fails, ensuring that the user's comfort is not affected to the greatest extent, thereby improving the user experience.

[0067] The grid power supply device 3 is used to provide city power (ie, alternating current).

[0068] Specifically, Figure 2As shown, the control device 4 includes: a fault detection module 41 and a control module 42. The fault detection module 41 is used to detect the current neutral current and the current line current on the three-phase circuit of the power supply device 3; according to the current neutral current and / or the current line current, whether the power supply device 3 fails is determined; the control module 42 is connected to the fault detection module 41, and the control module 42 is used to obtain the judgment result of the fault detection module 41, so as to adaptively adjust the power supply mode of the photovoltaic air conditioner 1 according to the judgment result. With such a structural setting, the fault detection module 41 can effectively monitor the change between the line current and the neutral current, so that the fault detection module 41 can quickly identify the power grid fault. This real-time detection helps to find problems in time and reduce the impact of faults on the system. And when the power supply device 3 is abnormal, the system can respond quickly through the fault detection module 41. At the same time, the control module 42 adaptively adjusts the power supply mode of the photovoltaic air conditioner 1 according to the fault detection result, which can ensure that the photovoltaic air conditioner 1 continues to work stably within a certain period of time, thereby significantly improving its operation reliability and stability, and further improving product performance.

[0069] Specifically, the photovoltaic air conditioning system further includes: a display device 5, the display device 5 is connected to the control device 4, the control device 4 is used to send the operation status of the photovoltaic air conditioning system to the display device 5, and the display device 5 is used to display the operation status of the photovoltaic air conditioning system. With such a structural setting, by setting the display device 5, the user can understand the operation status of the photovoltaic air conditioning system in real time, thereby improving the user's experience.

[0070] Among them, the operating conditions of the photovoltaic air-conditioning system include: the energy consumption of the photovoltaic air-conditioning 1, the power generation of the photovoltaic device 2 (such as the power generation efficiency of the photovoltaic device 2), the power status of the lighting energy storage device 8, the detection information of the outdoor light detection device 6, the detection and judgment results of the fault detection module 41, and the power supply mode and operation mode of the photovoltaic air-conditioning 1.

[0071] Optionally, the display device 5 is connected to the control module 42 .

[0072] Specifically, the photovoltaic air conditioning system also includes: an outdoor light detection device 6, which is arranged outdoors and located at one side of the photovoltaic panel of the photovoltaic device 2; the outdoor light detection device 6 is used to detect the outdoor light intensity; the outdoor light detection device 6 is connected to the control device 4, and the outdoor light detection device 6 converts the detected outdoor light intensity into a current signal and sends it to the control device 4. With such a structural setting, by setting the outdoor light detection device 6, the outdoor light intensity can be collected in real time, and the detected outdoor light intensity can be converted into a current signal and sent to the control device 4, so that the control device 4 can judge the power generation of the photovoltaic device 2 according to the current signal sent by the outdoor light detection device 6. Thereby, potential problems can be discovered and handled in time. Thereby ensuring that the photovoltaic air conditioner can operate normally while maximizing the use of photovoltaic power.

[0073] Optionally, the installation positions of the outdoor light detection device 6 and the photovoltaic panels of the photovoltaic device 2 are substantially the same, so that the light intensities that can be collected are almost the same.

[0074] Optionally, the outdoor light detection device 6 is an outdoor light sensor.

[0075] Furthermore, the control device 4 is connected to the photovoltaic device 2 and the photovoltaic air conditioner 1, and is used to control the photovoltaic device 2 and the photovoltaic air conditioner 1 to perform operations. The control device 4 is also used to obtain the power generation of the photovoltaic device 2 and the energy consumption of the photovoltaic air conditioner 1.

[0076] Optionally, the control module 42 is connected to the photovoltaic device 2 and the photovoltaic air conditioner 1, and the control module 42 is used to control the photovoltaic device 2 and the photovoltaic air conditioner 1 to operate. The control module 42 is also used to obtain the power generation of the photovoltaic device 2 and the power consumption of the photovoltaic air conditioner 1.

[0077] Specifically, the photovoltaic air conditioner 1 includes: a driving module 11 and a photovoltaic air conditioner unit 12, wherein the driving module 11 is connected to the photovoltaic air conditioner unit 12, and the driving module 11 is used to drive the photovoltaic air conditioner unit 12 to move; the driving module 11 is connected to the control device 4, and the control device 4 is used to control the movement of the driving module 11. With such a structural setting, by connecting the driving module 11 to the control device 4, the movement of the driving module 11 can be accurately controlled by the control device 4, ensuring that the photovoltaic air conditioner unit 12 operates in the best state, thereby improving the overall efficiency of the system. The control device 4 dynamically adjusts the parameters of the driving module 11 according to the real-time monitoring data to adapt to different operating conditions and further improve efficiency.

[0078] Optionally, the driving module 11 is connected to the control module 42, and the control module 42 is used to control the movement of the driving module 11. The photovoltaic air conditioner 12 is connected to the control module 42, and the control module 42 is used to obtain the energy consumption efficiency of the photovoltaic air conditioner 12.

[0079] Furthermore, the photovoltaic air conditioner 1 also includes: an energy storage module for storing the electric energy transmitted from the photovoltaic device 2, so that when the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, electric energy can be provided to ensure the normal operation of the photovoltaic air conditioner.

[0080] Specifically, the photovoltaic air conditioning system also includes: a lighting device 7 and a lighting energy storage device 8, wherein the lighting device 7 is used to illuminate the room; a control device 4 is connected to the lighting device 7, wherein the control device 4 is used to control the start and stop of the lighting device 7; the lighting energy storage device 8 is connected to the lighting device 7, wherein the lighting energy storage device 8 is used to provide electrical energy for the lighting device 7; and the lighting energy storage device 8 is connected to the control device 4, wherein the control device 4 is used to control the charging and discharging of the lighting energy storage device 8. With such a structural arrangement, by arranging the lighting device 7 and the lighting energy storage device 8, when the power grid power supply device 3 fails, the lighting function can be provided by the lighting device 7 and the lighting energy storage device 8, thereby meeting the basic needs of the user. At the same time, the control device 4 is respectively connected to the lighting device 7 and the lighting energy storage device 8, and can control the operating states of the lighting device 7 and the lighting energy storage device 8 according to the actual situation, so that the energy storage can be flexibly used according to the actual needs, avoiding unnecessary energy waste, and improving the overall energy utilization rate.

[0081] Optionally, the lighting device 7 and the lighting energy storage device 8 are arranged on the photovoltaic air conditioner 1 .

[0082] Optionally, the light brightness of the lighting device 7 changes with the energy supplied by the lighting energy storage device 8, which can improve the utilization efficiency of the stored energy.

[0083] Optionally, both the lighting device 7 and the lighting energy storage device 8 are connected to the control module 42 .

[0084] Specifically, the photovoltaic air conditioning system also includes: an indoor light detection device 10, which is used to detect the indoor light intensity; the indoor light detection device 10 is connected to the control device 4, and the indoor light detection device 10 sends the detected result to the control device 4; wherein the control device 4 controls the start and stop of the lighting device 7 and whether the lighting energy storage device 8 enters the discharge state according to the result detected by the indoor light detection device 10 and the power supply mode of the photovoltaic air conditioner 1. With such a structural setting, the indoor light detection device 10 can detect the indoor light intensity in real time, and the control device 4 is connected to the indoor light detection device 10. When the control device 4 is connected to the indoor light detection device 10, the lighting device 7 can be started and stopped and whether the lighting energy storage device 8 enters the discharge state according to the result detected by the indoor light detection device 10 and the power supply mode of the photovoltaic air conditioner 1, so that the system can flexibly use the energy storage according to actual needs, avoid unnecessary energy waste, and improve the overall energy utilization rate. In addition, the system can automatically monitor and respond to environmental changes, reflecting a certain intelligent communication function, reducing manual intervention, and improving user experience.

[0085] Optionally, the indoor light detection device 10 is connected to the fault detection module 41 and the control module 42 respectively. When the fault detection module 41 determines that a power grid fault occurs, the indoor light detection device 10 is controlled to perform detection, and the detection result of the indoor light detection device 10 is transmitted to the control module 42.

[0086] Optionally, the indoor light detection device 10 is an indoor light sensor.

[0087] Optionally, the lighting device 7 and the lighting energy storage device 8 fail to function, so that the lighting device 7 is turned on; or, the indoor light detection device 10 fails, and the lighting energy storage device 8 is controlled to discharge through the control module 42 (i.e., the control device 4), so that the lighting device 7 is turned on. The user can turn it off through the user end (e.g., a remote controller).

[0088] Specifically, the photovoltaic air conditioning system also includes: a DC bus 9, which is used to transmit direct current, and the DC bus 9 is connected to the lighting energy storage device 8; wherein the control device 4 is used to determine whether the lighting energy storage device 8 is in a fully charged state; when the photovoltaic air conditioner 1 is turned off, and the lighting energy storage device 8 is not in a fully charged state, the control device 4 controls the lighting energy storage device 8 to enter a charging state, so that the electric energy released by the DC bus 9 is transmitted to the lighting energy storage device 8. With such a structural setting, by connecting the DC bus 9 to the lighting energy storage device 8, the electric energy released by the DC bus 9 can be effectively transmitted to the lighting energy storage device 8 when the lighting energy storage device 8 is not in a fully charged state, which can improve the utilization rate of energy.

[0089] Optionally, the DC bus 9 is also connected to the control module 42 , the photovoltaic device 2 , the grid power supply device 3 , and the photovoltaic air conditioner 1 .

[0090] Optionally, the control process of the photovoltaic air conditioning system is:

[0091] Step 1: When the photovoltaic air conditioner 1 is turned on, the fault detection module 41 detects the current neutral current and the current line current on the three-phase circuit of the grid power supply device 3, and determines whether the grid power supply device 3 has a fault according to the current neutral current and / or the current line current. The judgment result is sent to the control module 42.

[0092] Among them, the method for determining whether a fault occurs in the power supply device 3 includes: if the current neutral line current is less than a first preset value and / or the current line current is less than a second preset value, it is determined that the power supply device 3 has a fault; if the current neutral line current is greater than or equal to the first preset value, and the current line current is greater than or equal to the second preset value, it is determined that the power supply device 3 has not a fault; wherein the first preset value is less than the second preset value.

[0093] Step 2, if the grid power supply device 3 fails, the control module 42 adjusts the power supply mode of the photovoltaic air conditioner 1 to the emergency power supply mode; if the grid power supply device 3 does not fail, the control module 42 determines whether the photovoltaic device 2 is generating electricity normally, and adjusts the power supply mode of the photovoltaic air conditioner 1 according to the judgment result.

[0094] Among them, if the power supply mode of the photovoltaic air conditioner 1 is adjusted to the emergency power supply mode, the control module 42 obtains the current energy consumption power of the photovoltaic air conditioner 1 and the current power generation power of the photovoltaic device 2; if the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, the control module 42 switches the operation mode of the photovoltaic air conditioner 1 to the intermittent drive mode; if the current energy consumption power of the photovoltaic air conditioner 1 is less than the current power generation power of the photovoltaic device 2, the control module 42 generates at least one operation plan of the photovoltaic air conditioner 1 based on the historical power generation data of the photovoltaic device 2 and the current power generation data of the photovoltaic device 2, and sends at least one operation plan of the photovoltaic air conditioner 1 to the user end for the user to choose; the photovoltaic air conditioner 1 operates according to the user's choice.

[0095] The operation mode of the photovoltaic air conditioner 1 is switched to the intermittent driving mode as follows: the control module 42 first controls the photovoltaic air conditioner 1 to switch to the standby state, and controls the power generated by the photovoltaic device 2 to be immediately transmitted to the energy storage module of the photovoltaic air conditioner 1 for storage; if the electric energy stored in the energy storage module meets the power consumption of the photovoltaic air conditioner 1 during operation, the control module 42 controls the photovoltaic air conditioner 1 to switch to the operating state; if the electric energy stored in the energy storage module cannot meet the power consumption of the photovoltaic air conditioner 1 during operation, the photovoltaic air conditioner 1 is controlled to maintain or switch to the standby state. At the same time, when the operation mode of the photovoltaic air conditioner 1 is switched to the intermittent driving mode, the control module 42 sends an optimization instruction to the photovoltaic device 2, so that the photovoltaic device 2 adjusts the output current and output voltage of the photovoltaic device 2 through the MPPT algorithm, so that the power generation power of the photovoltaic device 2 reaches the maximum value.

[0096] Step 3, if the grid power supply device 3 does not fail, the control module 42 obtains the current output current of the photovoltaic device 2 and the current signal corresponding to the outdoor light intensity detected by the outdoor light detection device 6; through the current signal, the current value corresponding to the current outdoor light intensity is known; if the current output current of the photovoltaic device 2 is less than the current value corresponding to the current outdoor light intensity, the photovoltaic device 2 cannot generate electricity normally; if the current output current of the photovoltaic device 2 is greater than or equal to the current value corresponding to the current outdoor light intensity, and the current output current of the photovoltaic device 2 is less than the third preset value, the photovoltaic device 2 generates electricity normally. Among them, the current value corresponding to the current outdoor light intensity is less than the third preset value.

[0097] Step 4, when the photovoltaic device 2 cannot generate electricity normally, the control module 42 adjusts the power supply mode of the photovoltaic air conditioner 1 to the grid power supply mode; when the photovoltaic device 2 generates electricity normally, the current energy consumption power of the photovoltaic air conditioner 1 and the current power generation power of the photovoltaic device 2 are obtained; when the current energy consumption power of the photovoltaic air conditioner 1 is less than or equal to the current power generation power of the photovoltaic device 2, the control module 42 adjusts the power supply mode of the photovoltaic air conditioner 1 to the photovoltaic power supply mode; when the current energy consumption power of the photovoltaic air conditioner 1 is greater than the current power generation power of the photovoltaic device 2, the control module 42 adjusts the power supply mode of the photovoltaic air conditioner 1 to the hybrid power supply mode; and sends an optimization instruction to the photovoltaic device 2, so that the photovoltaic device 2 adjusts the output current and output voltage of the photovoltaic device 2 through the MPPT algorithm, so that the power generation power of the photovoltaic device 2 reaches the maximum value.

[0098] Step 6, when the fault detection module 41 determines that the power grid power supply device 3 has a fault, the fault detection module 41 triggers the indoor light detection device 10 to turn on, and the indoor light detection device 10 starts to detect the indoor light intensity in real time, and sends the detected result to the control module 42. If the current indoor light intensity obtained by the control module 42 is less than the fourth preset value, the control module 42 controls the lighting energy storage device 8 to discharge, and the lighting device 7 turns on the lighting. If the current indoor light intensity obtained by the control module 42 controls the lighting energy storage device 8 to be in a standby state, and the lighting device 7 to be in an off state. At the same time, the control module 42 will send the power status of the lighting energy storage device 8 and the operating time of the lighting device 7 to the display device 5.

[0099] Step 7, when the photovoltaic air conditioner is shut down, the control module 42 obtains the power status of the lighting energy storage device 8 and determines whether the lighting energy storage device 8 is fully charged; if the lighting energy storage device 8 is not fully charged, the electric energy released by the DC bus 9 is transmitted to the lighting energy storage device 8 to charge the lighting energy storage device 8; if the lighting energy storage device 8 is fully charged, the electric energy released by the DC bus 9 is consumed by other components.

[0100] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable when appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0101] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0102] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0103] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0104] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method, characterized in that: The control method is applied to a photovoltaic air conditioning system, and the control method includes: After the photovoltaic air conditioner (1) is turned on, the current neutral line current and the current line current on the three-phase circuit of the power grid are detected; to determine whether a fault occurs in the power grid according to the current neutral line current and / or the current line current; The power supply mode of the photovoltaic air conditioner (1) is adaptively adjusted according to the judgment result.

2. The control method according to claim 1, characterized in that: The method for adaptively adjusting the power supply mode of the photovoltaic air conditioner (1) according to the judgment result comprises: If the power grid fails, the power supply mode of the photovoltaic air conditioner (1) is adjusted to an emergency power supply mode; If the power grid has not failed, it is determined whether the photovoltaic device (2) is generating electricity normally, and the power supply mode of the photovoltaic air conditioner (1) is adjusted according to the determination result.

3. The control method according to claim 1, characterized in that: The method for determining whether a fault occurs in the power grid comprises: If the current neutral line current is less than a first preset value and / or the current line current is less than a second preset value, it is determined that a fault occurs in the power grid; If the current neutral line current is greater than or equal to the first preset value, and the current line current is greater than or equal to the second preset value, it is determined that the power grid has not failed; The first preset value is smaller than the second preset value.

4. The control method according to claim 2, characterized in that: The control method further comprises: If the power supply mode of the photovoltaic air conditioner (1) is adjusted to the emergency power supply mode, the current energy consumption power of the photovoltaic air conditioner (1) and the current power generation power of the photovoltaic device (2) are obtained; If the current energy consumption power of the photovoltaic air conditioner (1) is greater than the current power generation power of the photovoltaic device (2), the operation mode of the photovoltaic air conditioner (1) is switched to an intermittent driving mode; If the current energy consumption power of the photovoltaic air conditioner (1) is less than or equal to the current power generation power of the photovoltaic device (2), at least one operation plan of the photovoltaic air conditioner (1) is generated based on the historical power generation data of the photovoltaic device (2) and the current power generation data of the photovoltaic device (2), and at least one operation plan of the photovoltaic air conditioner (1) is sent to the user end for the user to select; the photovoltaic air conditioner (1) is operated according to the user's selection.

5. The control method according to claim 4, characterized in that: The method of switching the operation mode of the photovoltaic air conditioner (1) to the intermittent driving mode if the current energy consumption power of the photovoltaic air conditioner (1) is greater than the current power generation power of the photovoltaic device (2) comprises: Controlling the photovoltaic air conditioner (1) to switch to a standby state, and controlling the electricity generated by the photovoltaic device (2) to be immediately transmitted to the photovoltaic air conditioner (1) for storage; If the stored electric energy satisfies the power consumption of the photovoltaic air conditioner (1) during operation, controlling the photovoltaic air conditioner (1) to switch to an operating state; If the stored electric energy cannot meet the energy consumption of the photovoltaic air conditioner (1) during operation, the photovoltaic air conditioner (1) is controlled to maintain or switch to the standby state.

6. The control method according to claim 4, characterized in that: The control method further comprises: If the current energy consumption power of the photovoltaic air conditioner (1) is greater than the current power generation power of the photovoltaic device (2), the output current and output voltage of the photovoltaic device (2) are adjusted so that the power generation power of the photovoltaic device (2) reaches a maximum value.

7. The control method according to claim 2, characterized in that: The method of determining whether the photovoltaic device (2) is generating electricity normally if the power grid has not failed, and adjusting the power supply mode of the photovoltaic air conditioner (1) according to the determination result, comprises: If the photovoltaic device (2) cannot generate electricity normally, the power supply mode of the photovoltaic air conditioner (1) is adjusted to a grid power supply mode; If the photovoltaic device (2) generates electricity normally, the current energy consumption power of the photovoltaic air conditioner (1) and the current power generation power of the photovoltaic device (2) are obtained; If the current energy consumption power of the photovoltaic air conditioner (1) is less than or equal to the current power generation power of the photovoltaic device (2), the power supply mode of the photovoltaic air conditioner (1) is adjusted to a photovoltaic power supply mode; If the current energy consumption power of the photovoltaic air conditioner (1) is greater than the current power generation power of the photovoltaic device (2), the power supply mode of the photovoltaic air conditioner (1) is adjusted to a hybrid power supply mode; and the output current and output voltage of the photovoltaic device (2) are adjusted so that the power generation power of the photovoltaic device (2) reaches a maximum value.

8. The control method according to claim 2, characterized in that: The method for determining whether the photovoltaic device (2) is generating electricity normally comprises: Obtaining the current output current of the photovoltaic device (2) and the current value corresponding to the current outdoor light intensity; If the current output current of the photovoltaic device (2) is less than the current value corresponding to the current outdoor light intensity, the photovoltaic device (2) cannot generate electricity normally; If the current output current of the photovoltaic device (2) is greater than or equal to the current value corresponding to the current outdoor light intensity, and the current output current of the photovoltaic device (2) is less than a third preset value, the photovoltaic device (2) generates electricity normally; Among them, the current value corresponding to the current outdoor light intensity is less than the third preset value.

9. The control method according to claim 1, characterized in that: The photovoltaic air conditioning system further comprises a lighting energy storage device (8) and a lighting device (7), wherein the lighting energy storage device (8) is connected to the lighting device (7); and the control method further comprises: If the power grid fails, obtaining indoor light intensity; If the indoor light intensity is less than a fourth preset value, controlling the lighting energy storage device (8) to discharge, and the lighting device (7) to turn on; If the indoor light intensity is greater than or equal to a fourth preset value, the lighting energy storage device (8) is controlled to be in a standby state, and the lighting device (7) is controlled to be in a closed state.

10. The control method according to claim 9, characterized in that: The photovoltaic air conditioning system further comprises: a DC bus (9), wherein the DC bus (9) is connected to the lighting energy storage device (8), and the control method further comprises: If the photovoltaic air conditioner (1) is turned off, the DC bus (9) releases electrical energy, and determines whether the lighting energy storage device (8) is fully charged; If the lighting energy storage device (8) is not in a fully charged state, the electric energy released by the DC bus (9) is transmitted to the lighting energy storage device (8) to charge the lighting energy storage device (8); If the lighting energy storage device (8) is in a fully charged state, the electric energy released by the DC bus (9) is consumed by other components.

11. A photovoltaic air conditioning system, characterized in that: The photovoltaic air conditioning system is applicable to the control method according to claim 1 to claim 10, and the photovoltaic air conditioning system comprises: Photovoltaic air conditioning (1); A photovoltaic device (2) and a power grid power supply device (3), wherein the photovoltaic device (2) and the power grid power supply device (3) are both connected to the photovoltaic air conditioner (1), and the photovoltaic device (2) and the power grid power supply device (3) are both used to provide electrical energy for the photovoltaic air conditioner (1); A control device (4), the control device (4) is used to detect the current neutral line current and the current line current on the three-phase circuit of the power supply device (3) of the power grid; judge whether the power supply device (3) has a fault according to the current neutral line current and / or the current line current; and adaptively adjust the power supply mode of the photovoltaic air conditioner (1) according to the judgment result.

12. The photovoltaic air conditioning system according to claim 11, characterized in that: The control device (4) comprises: A fault detection module (41) is used to detect a current neutral line current and a current line current on a three-phase circuit of the power grid power supply device (3); and to determine whether a fault occurs in the power grid power supply device (3) based on the current neutral line current and / or the current line current; A control module (42) is connected to the fault detection module (41), and the control module (42) is used to obtain the judgment result of the fault detection module (41) so as to adaptively adjust the power supply mode of the photovoltaic air conditioner (1) according to the judgment result.

13. The photovoltaic air conditioning system according to claim 11, characterized in that: The photovoltaic air-conditioning system further comprises: a display device (5), wherein the display device (5) is connected to the control device (4), wherein the control device (4) is used to send the operating status of the photovoltaic air-conditioning system to the display device (5), and wherein the display device (5) is used to display the operating status of the photovoltaic air-conditioning system.

14. The photovoltaic air conditioning system according to claim 11, characterized in that: The photovoltaic air conditioning system further comprises: an outdoor light detection device (6), the outdoor light detection device (6) being arranged outdoors and located at one side of the photovoltaic panel of the photovoltaic device (2); the outdoor light detection device (6) being used to detect outdoor light intensity; the outdoor light detection device (6) being connected to the control device (4), and the outdoor light detection device (6) being used to convert the detected outdoor light intensity into a current signal and send it to the control device (4).

15. The photovoltaic air conditioning system according to claim 11, characterized in that: The photovoltaic air conditioner (1) comprises: a drive module (11) and a photovoltaic air conditioner unit (12); the drive module (11) is connected to the photovoltaic air conditioner unit (12); the drive module (11) is used to drive the photovoltaic air conditioner unit (12) to move; the drive module (11) is connected to the control device (4); the control device (4) is used to control the movement of the drive module (11).

16. The photovoltaic air conditioning system according to claim 11, characterized in that: The photovoltaic air conditioning system is applicable to the control method according to claim 9, and the photovoltaic air conditioning system further comprises: A lighting device (7), the lighting device (7) being used for lighting a room; the control device (4) being connected to the lighting device (7), the control device (4) being used for controlling the start and stop of the lighting device (7); A lighting energy storage device (8), wherein the lighting energy storage device (8) is connected to the lighting device (7), and the lighting energy storage device (8) is used to provide electrical energy to the lighting device (7); the lighting energy storage device (8) is connected to the control device (4), and the control device (4) is used to control the charging and discharging of the lighting energy storage device (8).

17. The photovoltaic air conditioning system according to claim 16, characterized in that: The photovoltaic air conditioning system is applicable to the control method according to claim 9, and the photovoltaic air conditioning system further comprises: an indoor light detection device (10), the indoor light detection device (10) is used to detect the light intensity indoors; the indoor light detection device (10) is connected to the control device (4), and the indoor light detection device (10) sends the detected result to the control device (4); The control device (4) controls the start and stop of the lighting device (7) and whether the lighting energy storage device (8) enters a discharge state according to the detection result of the indoor light detection device (10) and the power supply mode of the photovoltaic air conditioner (1).

18. The photovoltaic air conditioning system according to claim 16, characterized in that: The photovoltaic air conditioning system is applicable to the control method according to claim 10, and the photovoltaic air conditioning system further comprises: A direct current bus (9), the direct current bus (9) being used to transmit direct current, the direct current bus (9) being connected to the lighting energy storage device (8); The control device (4) is used to determine whether the lighting energy storage device (8) is in a fully charged state; when the photovoltaic air conditioner (1) is turned off and the lighting energy storage device (8) is not in a fully charged state, the control device (4) controls the lighting energy storage device (8) to enter a charging state so that the electric energy released by the DC bus (9) is transmitted to the lighting energy storage device (8).

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