Control method and control device of solar air conditioner and solar air conditioner

Abstract

The invention relates to the field of electric appliances, and provides a control method and device of a solar air conditioner and the solar air conditioner. The control method comprises the following steps: acquiring an energy supply mode of the solar air conditioner, wherein the energy supply mode comprises pure commercial power supply, pure solar power supply and hybrid power supply of commercial power and solar power supply; according to the current energy supply mode and the target operation frequency of the solar air conditioner, the actual operation frequency of the solar air conditioner is determined; and according to the target operation frequency and the actual operation frequency, the opening degree of a throttling valve of the solar air conditioner is controlled and adjusted, so that the exhaust temperature of the compressor reaches the target exhaust temperature. Stable operation of the air conditioning system can be guaranteed in different power supply modes.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and in particular to a control method, control device, and solar air conditioner for solar air conditioning. Background Technology

[0002] Typical solar-powered air conditioning systems are equipped with photovoltaic panels that convert solar energy into direct current (DC) power, which directly or through energy storage devices supplies power to the air conditioner's compressor, fan, and other loads. Some systems also retain an AC mains power interface, allowing switching to AC power when solar energy is insufficient to ensure continuous operation of the air conditioner.

[0003] In existing technologies, solar air conditioning control methods mostly employ fixed or preset operating strategies. For example, the system calculates the target operating frequency based on the user-set temperature and environmental parameters, and directly starts the compressor at this frequency. The throttle valve then adjusts its opening based on the target frequency or indoor temperature feedback.

[0004] However, in solar or hybrid power supply modes, when the available energy power of the system is insufficient to support the air conditioner to run at the target frequency, the existing control methods fail to adaptively adjust the operating parameters, resulting in system instability or triggering protection mechanisms, which affects the user experience of the air conditioner. Summary of the Invention

[0005] This invention provides a control method, control device, and solar air conditioner for solar air conditioning, which addresses the deficiencies in the prior art and achieves the following effect: ensuring stable operation of the air conditioning system under different power supply modes.

[0006] This invention provides a control method for a solar-powered air conditioner, comprising: The energy supply methods for solar-powered air conditioners include pure grid power supply, pure solar power supply, and hybrid power supply combining grid power and solar power. The actual operating frequency of the solar air conditioner is determined based on its current energy supply method and target operating frequency. Based on the target operating frequency and the actual operating frequency, the opening of the throttle valve of the solar air conditioner is controlled and adjusted so that the compressor's exhaust temperature reaches the target exhaust temperature.

[0007] According to some embodiments of the present invention, the step of determining the actual operating parameters of the solar air conditioner based on the current energy supply mode and target operating parameters includes: Obtain the maximum power supply parameters corresponding to the current energy supply mode, and determine whether the maximum power supply parameters meet the requirement that the solar air conditioner operates at the target operating frequency; If the maximum power supply parameters do not meet the requirement that the solar air conditioner operates at the target operating frequency, the actual operating frequency of the solar air conditioner is determined based on the maximum power supply parameters. Alternatively, if the maximum power supply parameters satisfy the requirement that the solar air conditioner operates at the target operating frequency, the actual operating frequency is determined to be equal to the target operating frequency.

[0008] According to some embodiments of the present invention, the maximum power supply parameter includes the maximum input power of the mains power supply module and / or the solar power supply module to the solar air conditioner.

[0009] According to some embodiments of the present invention, the step of determining whether the maximum power supply parameter satisfies the requirement that the solar air conditioner operates at the target operating frequency includes: Obtain the target input power corresponding to the target operating frequency, and compare the target input power with the maximum input power; If the target input power is less than or equal to the maximum input power, then the maximum power supply parameters satisfy the requirement that the solar air conditioner operates at the target operating frequency. Alternatively, if the target input power is greater than the maximum input power, then the maximum power supply parameters do not meet the requirement that the solar air conditioner operates at the target operating frequency.

[0010] According to some embodiments of the present invention, the step of obtaining the maximum power supply parameter corresponding to the current energy supply mode includes: Under pure AC power supply, the maximum input power is the maximum output power of the AC power supply module; Alternatively, under hybrid power supply, the maximum input power is the sum of the maximum output power of the mains power supply module and the maximum output power of the solar power supply module; Alternatively, under pure solar power supply, the maximum input power is the maximum output power of the solar power module.

[0011] According to some embodiments of the present invention, the step of controlling and adjusting the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency so that the exhaust temperature of the compressor reaches the target exhaust temperature includes: Based on the target exhaust temperature, determine the target throttle valve opening corresponding to the target operating frequency; Calculate the difference between the target operating frequency and the actual operating frequency, and determine the throttle valve opening adjustment value based on the difference; The opening of the throttle valve is controlled by reducing the opening adjustment value based on the target throttle valve opening.

[0012] According to some embodiments of the present invention, the step of calculating the difference between the target operating frequency and the actual operating frequency, and determining the opening adjustment value of the throttle valve based on the difference, includes: When the difference is a first difference, the opening adjustment value is a first adjustment value; When the difference is the second difference, the opening adjustment value is the second adjustment value; When the difference is the third difference, the opening adjustment value is the third adjustment value; Wherein, if the first difference is greater than the second difference, and the second difference is greater than the third difference, then the first adjustment value is greater than the second adjustment value, and the second adjustment value is greater than the third adjustment value.

[0013] According to some embodiments of the present invention, the step of obtaining the energy supply method for solar-powered air conditioning includes: Obtain the solar output power of the solar power module and the mains output voltage and mains output current of the mains power module; When the solar power output is greater than zero and the mains power output current is equal to zero, the energy supply method is pure solar power supply; When the solar power output is zero and both the mains power output current and the mains power output voltage are greater than zero, the energy supply method is pure mains power supply. When the solar power output is greater than zero and both the mains power output current and the mains power output voltage are greater than zero, the energy supply method is a hybrid power supply.

[0014] This invention also protects a control device for a solar-powered air conditioner, comprising: The first acquisition module is used to acquire the energy supply mode of the solar air conditioner, which includes pure mains power supply, pure solar power supply, and hybrid power supply of both mains power and solar power. The second acquisition module is used to determine the actual operating frequency of the solar air conditioner based on the current energy supply mode and target operating frequency of the solar air conditioner. The control module is used to control and adjust the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency, so that the exhaust temperature of the compressor reaches the target exhaust temperature.

[0015] The present invention also protects a solar-powered air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the control method for the solar-powered air conditioner as described in the first aspect of the present invention.

[0016] In summary, the solar air conditioner control method provided by this invention obtains the energy supply mode in advance and calculates the actual power supply capacity under the current energy supply mode, so that the operating frequency of the solar air conditioner can be adjusted according to the actual power supply capacity, ensuring the smooth start-up and stable operation of the air conditioner. Furthermore, by further adjusting the valve opening, the refrigerant flow rate is matched with the actual suction capacity of the compressor, thereby avoiding problems such as evaporator overcooling, compressor liquid slugging, or abnormal exhaust temperature, thus improving system efficiency and reliability.

[0017] Furthermore, compared with related technologies, the control method of the present invention has advantages such as improving system operation stability, enhancing energy adaptability, optimizing refrigeration system matching, and ensuring user experience.

[0018] Specifically, this method acquires the energy supply mode in real time and determines the actual operating frequency accordingly, matching the compressor's power consumption with the currently available energy output. When solar power is insufficient or the total power of the hybrid power supply is limited, it avoids abnormal shutdowns caused by forced operation at the target frequency, such as DC bus voltage drops, overcurrent, or undervoltage protection issues, effectively improving the air conditioner's operational stability under complex power supply conditions. Simultaneously, the system can dynamically adjust its operating strategy based on different power supply modes: pure AC power, pure solar power, or a hybrid power supply.

[0019] In addition, this method can adjust the opening of the throttle valve according to the difference between the target frequency and the actual frequency while adjusting the operating frequency, thus avoiding the risk of evaporator overcooling or compressor liquid slugging caused by the throttle valve opening remaining unchanged due to a decrease in frequency, and ensuring the rationality and safety of the refrigeration cycle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is one of the flowcharts illustrating the control method for a solar-powered air conditioner provided by the present invention; Figure 2 This is the second flowchart illustrating the control method for solar-powered air conditioning provided by the present invention; Figure 3 This is the third flowchart illustrating the control method for solar-powered air conditioning provided by the present invention; Figure 4 This is a schematic diagram of the control device for a solar-powered air conditioner provided by the present invention; Figure 5This is a schematic diagram of the structure of the solar air conditioner provided by the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] The control method, control device, and air conditioner of the solar-powered air conditioner proposed in this invention are described below with reference to the accompanying drawings. Before providing a detailed description of the embodiments of this invention, the overall application scenario is first described. The control method, control device, electronic device, and computer-readable storage medium of the solar-powered air conditioner of this invention can be applied locally to the air conditioner, to cloud platforms in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. These third-party devices may include various types such as mobile phones, tablets, laptops, in-vehicle computers, and other smart terminals.

[0024] The following description uses only the control method applicable to solar air conditioners as an example. It should be understood that the control method of this embodiment can also be applied to cloud platforms and third-party devices.

[0025] The following is combined Figures 1 to 3 The present invention describes a control method for a solar-powered air conditioner, wherein the solar-powered air conditioner is simultaneously connected to two external power supply modules, one of which is a mains power supply module and the other is a solar power supply module.

[0026] like Figure 1 As shown, the control method for a solar-powered air conditioner according to a first aspect embodiment of the present invention includes: Step S1: Obtain the energy supply method of the solar air conditioner. The energy supply methods include pure grid power supply, pure solar power supply, and hybrid power supply of grid power and solar power. Step S2: Determine the actual operating frequency of the solar air conditioner based on its current energy supply method and target operating frequency. Step S3: Based on the target operating frequency and the actual operating frequency, control and adjust the opening of the throttle valve of the solar air conditioner so that the compressor's exhaust temperature reaches the target exhaust temperature.

[0027] According to the control method of the solar-powered air conditioner of the present invention, in step S1, the system determines whether the current energy source of the air conditioner is pure mains power supply, pure solar power supply, or a hybrid power supply by detecting the electrical signals of the mains power input and solar power input. Subsequently, in step S2, the system calculates the maximum input power available under the current energy supply mode. Combined with the target operating frequency set by the user, it determines whether the current energy is sufficient to support operation at that frequency. If the energy is insufficient, a lower actual operating frequency is recalculated based on the maximum input power. Finally, in step S3, the system corrects the initial opening of the electronic expansion valve based on the difference between the target operating frequency and the actual operating frequency. For example, when the actual operating frequency is lower than the target frequency, the opening of the throttle valve is reduced to match the refrigerant flow rate with the actual suction capacity of the compressor, thereby controlling the compressor's discharge temperature within the target range.

[0028] It should be noted that the core principle of this invention lies in establishing a closed-loop control logic of "energy supply - operating capacity - flow matching" to ensure that the air conditioner can start up safely and operate stably under different energy conditions.

[0029] Specifically, in scenarios where solar energy is used for power generation, the intermittency and power fluctuations of the energy source can lead to an imbalance between energy supply and demand when the air conditioner starts. Traditional control methods do not consider this factor, which can easily cause system overload protection or operational instability. This invention can identify the energy supply method, quantify the maximum available input power, and use this as a constraint to adjust the compressor's operating frequency. For example, when the maximum input power is insufficient to support the target operating frequency, the system actively reduces the actual operating frequency, achieving a dynamic balance between energy consumption and energy supply.

[0030] It is understandable that changes in compressor operating frequency directly affect the refrigerant circulation and thermodynamic state of the system. When the compressor operating frequency decreases, the compressor's suction volume decreases. If the throttle valve opening remains unchanged, it will lead to lower superheat at the evaporator outlet, and even the risk of liquid refrigerant flowing back into the compressor. Simultaneously, changes in suction temperature will also affect the discharge temperature. To avoid these problems, this invention introduces the frequency difference between the target operating frequency and the actual operating frequency as a basis for correcting the throttle valve opening. By reducing the valve opening, the refrigerant flow into the evaporator is limited, adapting it to the suction capacity of the compressor after frequency reduction, thereby maintaining reasonable superheat and discharge temperature, and ensuring the safety and reliability of system operation.

[0031] Furthermore, the specific working process of the control method of the present invention is as follows: During the air conditioner startup phase, the system first executes step S1, which determines the current energy supply method by detecting the electrical parameters of the mains power input terminal and the solar power input terminal. For example, if only mains power is present and there is current input, it is determined to be pure mains power supply; if only solar power is output, it is determined to be pure solar power supply; if both are present and there is energy input, it is determined to be hybrid power supply.

[0032] After completing energy pattern recognition, the system proceeds to step S2. The system acquires user-defined parameters and ambient temperature, and calculates the target operating frequency to meet cooling or heating requirements. Simultaneously, the system obtains the corresponding maximum power supply parameters based on the current energy supply method. For pure grid power supply, the maximum power supply parameter is the maximum output power of the grid under current grid conditions; for pure solar power supply, the maximum power supply parameter is the maximum output power tracked in real-time by the photovoltaic system using the MPPT (Maximum Power Point Tracking) algorithm; for hybrid power supply, the maximum power supply parameter is the sum of the maximum output power of the grid and the maximum output power of the solar power.

[0033] The system compares the target input power required for the target operating frequency with the aforementioned maximum power supply parameters. If the target input power is greater than the maximum power supply parameters, it indicates insufficient energy supply, and the system will calculate a lower actual operating frequency based on the maximum power supply parameters. If the target input power is less than or equal to the maximum power supply parameters, the actual operating frequency is equal to the target operating frequency.

[0034] Subsequently, the system proceeds to step S3. Based on the target operating frequency, the system obtains the target throttle valve opening. This opening is a baseline value set by the system under standard operating conditions to achieve optimal energy efficiency and stability. Since the actual operating frequency may be lower than the target operating frequency, the system needs to correct the valve opening. The system calculates the difference between the target operating frequency and the actual operating frequency and determines an opening adjustment value based on this difference. Ultimately, the initial opening of the electronic expansion valve is set to the target throttle valve opening minus this opening adjustment value. By reducing the valve opening, the system ensures that the refrigerant flow matches the capacity of the compressor after frequency reduction, thereby achieving smooth and safe start-up and operation under energy-constrained conditions.

[0035] In summary, the solar air conditioner control method provided by this invention obtains the energy supply mode in advance and calculates the actual power supply capacity under the current energy supply mode, so that the operating frequency of the solar air conditioner can be adjusted according to the actual power supply capacity, ensuring the smooth start-up and stable operation of the air conditioner. Furthermore, by further adjusting the valve opening, the refrigerant flow rate is matched with the actual suction capacity of the compressor, thereby avoiding problems such as evaporator overcooling, compressor liquid slugging, or abnormal exhaust temperature, thus improving system efficiency and reliability.

[0036] Furthermore, compared with related technologies, the control method of the present invention has advantages such as improving system operation stability, enhancing energy adaptability, optimizing refrigeration system matching, and ensuring user experience.

[0037] Specifically, this method acquires the energy supply mode in real time and determines the actual operating frequency accordingly, matching the compressor's power consumption with the currently available energy output. When solar power is insufficient or the total power of the hybrid power supply is limited, it avoids abnormal shutdowns caused by forced operation at the target frequency, such as DC bus voltage drops, overcurrent, or undervoltage protection issues, effectively improving the air conditioner's operational stability under complex power supply conditions. Simultaneously, the system can dynamically adjust its operating strategy based on different power supply modes: pure AC power, pure solar power, or a hybrid power supply.

[0038] In addition, this method can adjust the opening of the throttle valve according to the difference between the target frequency and the actual frequency while adjusting the operating frequency, thus avoiding the risk of evaporator overcooling or compressor liquid slugging caused by the throttle valve opening remaining unchanged due to a decrease in frequency, and ensuring the rationality and safety of the refrigeration cycle.

[0039] like Figure 2 As shown, according to some embodiments of the present invention, the step of determining the actual operating parameters of a solar air conditioner based on its current energy supply method and target operating parameters includes: Obtain the maximum power supply parameters corresponding to the current energy supply method, and determine whether the maximum power supply parameters meet the requirements for the solar air conditioner to operate at the target operating frequency; If the maximum power supply parameters do not meet the requirements for the solar air conditioner to operate at the target operating frequency, the actual operating frequency of the solar air conditioner shall be determined based on the maximum power supply parameters. Alternatively, if the maximum power supply parameters meet the requirement that the solar air conditioner operates at the target operating frequency, the actual operating frequency is determined to be equal to the target operating frequency.

[0040] In this embodiment, the system obtains the maximum power supply parameters that can be provided under the current energy supply mode. These maximum power supply parameters can be parameters such as maximum supply voltage, maximum supply current, or maximum input power, which are not specifically addressed in this invention. Taking maximum input power as an example, the system compares this maximum input power with the target input power required for the air conditioner to operate at the target frequency, thus determining whether the current energy is sufficient to support operation at that frequency.

[0041] If the conditions are not met, it indicates that the energy supply is insufficient and cannot support the air conditioner to operate at the target frequency. At this time, the system uses the maximum power supply parameters as constraints and, through a preset mapping relationship, calculates a lower actual operating frequency that matches the available energy, ensuring that the compressor's power consumption does not exceed the energy supply capacity.

[0042] When the target frequency is met, it indicates that the current energy supply is sufficient to fully support the air conditioning's operating needs. At this point, the system requires no adjustments and directly uses the target operating frequency as the actual operating frequency, allowing the air conditioner to operate at the performance level expected by the user.

[0043] In this way, the control method determines whether the maximum power supply parameters meet the target operating requirements and dynamically determines the actual operating frequency accordingly, thus achieving precise matching between energy supply and air conditioning load. When energy is sufficient, it ensures the full performance output of the air conditioner; when energy is insufficient, it actively reduces the operating frequency to adapt to the supply capacity, avoiding system overload triggering protection or shutdown.

[0044] Understandably, the above steps significantly improve the operational reliability and energy efficiency of solar air conditioners under different power supply conditions, ensuring that the system can work stably and continuously under various operating conditions.

[0045] Furthermore, the maximum power supply parameter includes the maximum input power of the mains power supply module and / or solar power supply module to the solar-powered air conditioner. This parameter reflects the upper limit of the system's energy supply under current operating conditions, and can be used to determine whether the air conditioner can operate at the target frequency.

[0046] According to some embodiments of the present invention, the steps for obtaining the energy supply method of a solar-powered air conditioner include: Obtain the solar output power of the solar power module and the mains output voltage and mains output current of the mains power module; When the solar power output is greater than zero and the mains power output current is equal to zero, the energy supply method is pure solar power. When the solar power output is zero and both the mains output current and mains output voltage are greater than zero, the energy supply method is pure mains power supply. When the solar power output is greater than zero and both the mains power output current and mains power output voltage are greater than zero, the energy supply method is a hybrid power supply.

[0047] The specific methods for obtaining the maximum input power of solar air conditioning under different energy supply modes are as follows: Under pure AC power supply, the maximum input power is the maximum output power of the AC power supply module.

[0048] Specifically, when the system is in pure AC power supply mode, solar energy input is invalid, and the air conditioner's energy comes entirely from AC power. In this mode, the maximum input power is determined by the output capacity of the AC power supply module. This value is calculated by detecting the AC input voltage and the system's maximum allowable input current (current limit), i.e.: Maximum input power = AC voltage × current limit.

[0049] Under hybrid power supply, the maximum input power is the sum of the maximum output power of the AC power module and the maximum output power of the solar power module.

[0050] Specifically, when the system is in hybrid power supply mode, both mains power and solar power are supplied simultaneously. In this mode, the maximum input power is the sum of the maximum output capabilities of both, specifically: the maximum output power of the mains power module and the maximum output power of the solar power module tracked in real-time using the MPPT algorithm.

[0051] Under pure solar power supply, the maximum input power is the maximum output power of the solar power module.

[0052] Specifically, when the system is in pure solar power mode, mains power input is invalid, and the air conditioning energy comes entirely from solar energy. At this time, the maximum input power is the maximum power that the solar power module can currently output. This value is dynamically determined by the MPPT controller, which monitors the output voltage and current of the photovoltaic panel array in real time, and uses a maximum power point tracking algorithm to ensure optimal power generation capacity under current light and temperature conditions.

[0053] As shown above, this method defines the acquisition method of maximum input power for different energy supply modes, thereby accurately quantifying the total amount of energy available to the current system, making the determination of the actual operating frequency more scientific and reliable, and effectively improving the adaptability and stability of solar air conditioning in various power supply scenarios.

[0054] In a specific embodiment of the present invention, the step of determining whether the maximum power supply parameters meet the requirements for the solar air conditioner to operate at the target operating frequency includes: Obtain the target input power corresponding to the target operating frequency, and compare the target input power with the maximum input power; If the target input power is less than or equal to the maximum input power, then the maximum power supply parameters will satisfy the requirement that the solar air conditioner operates at the target operating frequency. Alternatively, if the target input power is greater than the maximum input power, then the maximum power supply parameters do not meet the requirement for the solar air conditioner to operate at the target operating frequency.

[0055] In this embodiment, the system determines the target operating frequency of the compressor based on the user-defined operating mode and the current ambient temperature. This target operating frequency corresponds to a specific input power requirement, i.e., the target input power. The system obtains this value through a pre-stored "frequency-input power" mapping relationship. Subsequently, the target input power is compared numerically with the maximum input power determined in the previous step to determine whether the energy supply is sufficient.

[0056] If the target input power is less than or equal to the maximum input power, it indicates that the current energy supply capacity is sufficient to cover the power demand of the air conditioner at the target frequency. In this case, the system determines that the maximum power supply parameters meet the operating conditions, and no adjustment to the operating status is required; the air conditioner can operate normally at the target frequency.

[0057] If the target input power exceeds the maximum input power, it indicates that the current energy supply capacity is insufficient to support the air conditioner operating at the target frequency. In this case, the system determines that the maximum power supply parameters do not meet the operating conditions, resulting in a power shortfall. To avoid system overload, the operating parameters must be adjusted to adapt to the actual energy supply level.

[0058] In summary, the above judgment steps, by directly comparing the target input power with the maximum input power, can accurately identify whether the energy supply meets the operating requirements of the air conditioner. When energy is sufficient, performance output is guaranteed, and when energy is insufficient, the frequency reduction mechanism is triggered in a timely manner. This effectively prevents system anomalies caused by power mismatch and improves the operational safety and stability of solar air conditioners under different operating conditions.

[0059] like Figure 3 As shown, according to some embodiments of the present invention, the step of controlling and adjusting the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency so that the compressor's exhaust temperature reaches the target exhaust temperature includes: Determine the target throttle valve opening corresponding to the target operating frequency based on the target exhaust temperature; Calculate the difference between the target operating frequency and the actual operating frequency, and determine the throttle valve opening adjustment value based on the difference; The opening degree of the throttle valve is controlled by reducing the opening adjustment value based on the target throttle valve opening degree.

[0060] In this embodiment, the system determines a reference opening degree, i.e., the target throttle valve opening degree, that matches the preset target exhaust temperature and the compressor's target operating frequency by looking up a table or through a control model. This opening degree is an ideal value set by the system under standard operating conditions to achieve optimal energy efficiency and stable operation, ensuring that the refrigerant flow rate matches the compressor capacity and the exhaust temperature reaches the target value when operating at the target frequency.

[0061] The system then calculates the difference between the target operating frequency and the actual operating frequency. This difference reflects the frequency reduction caused by insufficient energy supply. Based on the magnitude of this difference, the system determines an opening adjustment value through a preset mapping relationship. The larger the difference, the greater the frequency reduction and the more significant the reduction in compressor intake, thus requiring a larger opening adjustment value.

[0062] Finally, the system sets the initial opening of the electronic expansion valve to the target throttle valve opening minus the adjustment value. Since the actual operating frequency is lower than the target frequency, the compressor's refrigerant demand is reduced. By actively reducing the valve opening, the system limits the refrigerant flow into the evaporator, matching it to the actual suction capacity of the compressor after frequency reduction. This avoids evaporator overcooling, liquid return, or compressor liquid slugging, while also helping to maintain the discharge temperature within a safe and reasonable range.

[0063] In this way, this method achieves dynamic matching between refrigerant flow and the actual operating capacity of the compressor by linking the setting of the throttle valve opening to the difference between the target frequency and the actual frequency. When insufficient energy leads to frequency reduction, reducing the valve opening effectively prevents system anomalies caused by excessive flow, thus improving the stability and safety of the refrigeration cycle. This adjustment mechanism, based on quantitative correction of the frequency difference, offers high control precision and timely response, ensuring reliable operation of the solar air conditioner under variable power conditions.

[0064] In some specific embodiments of the present invention, the step of calculating the difference between the target operating frequency and the actual operating frequency, and determining the opening adjustment value of the throttle valve based on the difference, includes: When the difference is the first difference value, the opening adjustment value is the first adjustment value; When the difference is the second difference value, the opening adjustment value is the second adjustment value; When the difference is the third difference value, the opening adjustment value is the third adjustment value.

[0065] If the first difference is greater than the second difference, and the second difference is greater than the third difference, then the first adjustment value is greater than the second adjustment value, and the second adjustment value is greater than the third adjustment value.

[0066] For example, a large difference between the target operating frequency and the actual operating frequency (defined as the first difference) indicates that the compressor is drastically reducing its frequency due to a severe energy shortage, resulting in a significant decrease in refrigerant intake. In this case, the system needs to drastically reduce the refrigerant flow rate to match the compressor's capacity. Therefore, setting a larger opening adjustment value (the first adjustment value) allows the throttle valve opening to decrease further from the reference value, effectively preventing refrigerant accumulation in the evaporator or refrigerant return from the compressor.

[0067] When the frequency difference is at a moderate level (defined as the second difference), it indicates a slight energy shortage, and the compressor moderately reduces its frequency. At this time, the refrigerant flow demand decreases, but the change is small. The system accordingly adopts a moderate opening adjustment value (the second adjustment value) to moderately correct the throttle valve opening, ensuring that the flow rate matches the capacity and maintaining stable system operation.

[0068] When the frequency difference is small (defined as the third difference), it indicates that the energy supply is close to meeting the demand, and the compressor only slightly reduces its frequency or basically maintains the target frequency. At this time, the refrigerant flow demand does not change much. The system uses a small opening adjustment value (the third adjustment value) to fine-tune the opening of the throttle valve, avoiding over-adjustment that could lead to slow system response or oscillation.

[0069] By establishing a hierarchical correspondence between frequency difference and opening adjustment value, this method achieves refined and gradient-based adjustment of the throttle valve opening. The adjustment amount adapts to the frequency reduction amplitude, avoiding system risks caused by excessive flow during significant frequency reduction and preventing insufficient cooling capacity due to excessive valve closure during slight frequency reduction.

[0070] The control device for a solar-powered air conditioner provided by the present invention is described below. The control device for a solar-powered air conditioner described below can be referred to in correspondence with the control method for a solar-powered air conditioner described above.

[0071] like Figure 4 As shown, the control device for a solar-powered air conditioner according to a second aspect embodiment of the present invention includes: The first acquisition module 110 is used to acquire the energy supply mode of the solar air conditioner, including pure grid power supply, pure solar power supply, and hybrid power supply of grid power and solar power. The second acquisition module 120 is used to determine the actual operating frequency of the solar air conditioner based on the current energy supply method and target operating frequency of the solar air conditioner. The control module 130 is used to control and adjust the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency, so that the exhaust temperature of the compressor reaches the target exhaust temperature.

[0072] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute a control method for the solar air conditioner, including: acquiring the energy supply mode of the solar air conditioner, which may include pure AC power supply, pure solar power supply, or a hybrid power supply combining AC and solar power; determining the actual operating frequency of the solar air conditioner based on its current energy supply mode and target operating frequency; and controlling and adjusting the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency, so that the compressor's exhaust temperature reaches the target exhaust temperature.

[0073] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0074] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by the computer, the computer can execute the control method for the solar air conditioner provided by the above methods, including: obtaining the energy supply mode of the solar air conditioner, the energy supply mode including pure mains power supply, pure solar power supply, and hybrid power supply of both mains power and solar power supply; determining the actual operating frequency of the solar air conditioner according to the current energy supply mode and the target operating frequency; and controlling and adjusting the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency so that the exhaust temperature of the compressor reaches the target exhaust temperature.

[0075] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the control methods of the solar air conditioner provided above, including: acquiring the energy supply mode of the solar air conditioner, the energy supply mode including pure mains power supply, pure solar power supply, and hybrid power supply of both mains power and solar power supply; determining the actual operating frequency of the solar air conditioner based on the current energy supply mode and the target operating frequency; and controlling and adjusting the opening of the throttle valve of the solar air conditioner based on the target operating frequency and the actual operating frequency, so that the exhaust temperature of the compressor reaches the target exhaust temperature.

[0076] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0077] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a solar-powered air conditioner, characterized in that, include: The energy supply methods for solar-powered air conditioners include pure grid power supply, pure solar power supply, and hybrid power supply combining grid power and solar power. The actual operating frequency of the solar air conditioner is determined based on its current energy supply method and target operating frequency. Based on the target operating frequency and the actual operating frequency, the opening of the throttle valve of the solar air conditioner is controlled and adjusted so that the compressor's exhaust temperature reaches the target exhaust temperature.

2. The control method for solar-powered air conditioning according to claim 1, characterized in that, The step of determining the actual operating parameters of the solar air conditioner based on its current energy supply method and target operating parameters includes: Obtain the maximum power supply parameters corresponding to the current energy supply mode, and determine whether the maximum power supply parameters meet the requirement that the solar air conditioner operates at the target operating frequency; If the maximum power supply parameters do not meet the requirement that the solar air conditioner operates at the target operating frequency, the actual operating frequency of the solar air conditioner is determined based on the maximum power supply parameters. Alternatively, if the maximum power supply parameters satisfy the requirement that the solar air conditioner operates at the target operating frequency, the actual operating frequency is determined to be equal to the target operating frequency.

3. The control method for solar-powered air conditioning according to claim 2, characterized in that, The maximum power supply parameters include the maximum input power of the mains power supply module and / or the solar power supply module to the solar air conditioner.

4. The control method for solar-powered air conditioning according to claim 3, characterized in that, The step of determining whether the maximum power supply parameters meet the requirement that the solar air conditioner operates at the target operating frequency includes: Obtain the target input power corresponding to the target operating frequency, and compare the target input power with the maximum input power; If the target input power is less than or equal to the maximum input power, then the maximum power supply parameters satisfy the requirement that the solar air conditioner operates at the target operating frequency. Alternatively, if the target input power is greater than the maximum input power, then the maximum power supply parameters do not meet the requirement that the solar air conditioner operates at the target operating frequency.

5. The control method for solar-powered air conditioning according to claim 3, characterized in that, The step of obtaining the maximum power supply parameters corresponding to the current energy supply mode includes: Under pure AC power supply, the maximum input power is the maximum output power of the AC power supply module; Alternatively, under hybrid power supply, the maximum input power is the sum of the maximum output power of the mains power supply module and the maximum output power of the solar power supply module; Alternatively, under pure solar power supply, the maximum input power is the maximum output power of the solar power module.

6. The control method for a solar-powered air conditioner according to any one of claims 1 to 5, characterized in that, The step of controlling and adjusting the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency so that the compressor's exhaust temperature reaches the target exhaust temperature includes: Based on the target exhaust temperature, determine the target throttle valve opening corresponding to the target operating frequency; Calculate the difference between the target operating frequency and the actual operating frequency, and determine the throttle valve opening adjustment value based on the difference; The opening of the throttle valve is controlled by reducing the opening adjustment value based on the target throttle valve opening.

7. The control method for solar-powered air conditioning according to claim 6, characterized in that, The step of calculating the difference between the target operating frequency and the actual operating frequency, and determining the throttle valve opening adjustment value based on the difference, includes: When the difference is a first difference, the opening adjustment value is a first adjustment value; When the difference is the second difference, the opening adjustment value is the second adjustment value; When the difference is the third difference, the opening adjustment value is the third adjustment value; Wherein, if the first difference is greater than the second difference, and the second difference is greater than the third difference, then the first adjustment value is greater than the second adjustment value, and the second adjustment value is greater than the third adjustment value.

8. The control method for a solar-powered air conditioner according to any one of claims 1 to 5, characterized in that, The steps for obtaining the energy supply method for solar-powered air conditioning include: Obtain the solar output power of the solar power module and the mains output voltage and mains output current of the mains power module; When the solar power output is greater than zero and the mains power output current is equal to zero, the energy supply method is pure solar power supply; When the solar power output is zero and both the mains power output current and the mains power output voltage are greater than zero, the energy supply method is pure mains power supply. When the solar power output is greater than zero and both the mains power output current and the mains power output voltage are greater than zero, the energy supply method is a hybrid power supply.

9. A control device for a solar-powered air conditioner, characterized in that, include: The first acquisition module is used to acquire the energy supply mode of the solar air conditioner, which includes pure mains power supply, pure solar power supply, and hybrid power supply of both mains power and solar power. The second acquisition module is used to determine the actual operating frequency of the solar air conditioner based on the current energy supply mode and target operating frequency of the solar air conditioner. The control module is used to control and adjust the opening of the throttle valve of the solar air conditioner according to the target operating frequency and the actual operating frequency, so that the exhaust temperature of the compressor reaches the target exhaust temperature.

10. A solar-powered air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method for a solar-powered air conditioner as described in any one of claims 1 to 8.

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