Photovoltaic air conditioner control method and air conditioner system

Abstract

The application provides a photovoltaic air conditioner control method and an air conditioner system, and relates to the technical field of air conditioners, and solves the technical problem of heat accumulation of a controller in a photovoltaic air conditioner for a long time, which affects system stability and service life. The method comprises the following steps: determining whether the mainboard controller needs to be cooled; when the determination result is that the mainboard controller needs to be cooled, obtaining indoor environment parameters; based on the obtained indoor environment parameters, determining whether the indoor environment reaches a working condition point; and based on the determination result, performing different cooling processing steps. The application does not need to increase redundant structural components, and can ensure the reliability of the mainboard controller in high-temperature operation by only adjusting the operation logic; the maintenance cost of the mainboard controller is saved, the contradiction between the heat comfort of the air conditioner and the heat of the mainboard controller is balanced, the phenomenon of performance decline of the system caused by the overheat of the battery operation is improved while the heat comfort of the indoor environment is met, the service life of the entire photovoltaic air conditioner system is prolonged, and the maintenance cost of the battery system is reduced.

Description

Technical Field

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

[0002] Photovoltaic power generation is one of the common methods of solar power generation, characterized by relatively high conversion efficiency, safety, and flexibility. The control system is one of the core components of the entire photovoltaic air conditioning system, responsible for photovoltaic power generation, power supply, and air conditioning operation protection. During long-term operation, the heat generated by the flowing current causes the electronic components to heat up, and the controller, integrated in the enclosed space outside the air conditioner, is prone to heat accumulation, affecting the system's stability and service life. Summary of the Invention

[0003] The purpose of this invention is to provide a control method and air conditioning system for photovoltaic air conditioners, so as to solve the technical problems existing in the prior art, such as heat accumulation in the controller during long-term operation of photovoltaic air conditioners, which affects the stability and service life of the system.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention provides a control method for a photovoltaic air conditioner, which is a temperature management method for a motherboard controller, the method comprising:

[0006] Determine if the motherboard controller needs cooling;

[0007] When the determination indicates that cooling is required, obtain indoor environmental parameters;

[0008] Based on the acquired indoor environmental parameters, determine whether the indoor environment has reached the operating point;

[0009] Based on the judgment results, different cooling treatment steps are executed.

[0010] Furthermore, determining whether the motherboard controller needs cooling includes:

[0011] Obtain the air conditioning operating season;

[0012] When the air conditioner is operating in summer, obtain the mainboard controller temperature T_mainboard.

[0013] When the motherboard controller temperature T_motherboard is greater than or equal to the preset optimal temperature T_optimal, it is determined that cooling is required.

[0014] If the motherboard controller temperature T_motherboard is less than the preset optimal temperature T_optimal, then cooling is not required.

[0015] Furthermore, based on the judgment result, different cooling processing steps are performed, including:

[0016] When the indoor environmental parameters do not reach the operating point, perform the initial cooling treatment step;

[0017] When the indoor environmental parameters reach the operating point, an advanced cooling process is executed.

[0018] Furthermore, the initial cooling process includes:

[0019] The air conditioner continues to operate in cooling mode;

[0020] The air conditioning cooling operation parameters are adjusted based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal.

[0021] Furthermore, adjusting the air conditioning cooling operation parameters based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal includes:

[0022] When 0℃ < mainboard controller temperature T_mainboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner is controlled to run at a medium-low speed, the outdoor fan is controlled to run at a medium speed, the compressor runs at a 10Hz frequency, and the opening of the electronic expansion valve is adaptively adjusted to a smaller value, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0023] When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner is controlled to run in silent mode, the outdoor fan is controlled to run in medium-high fan mode, the compressor runs at a reduced frequency of 10Hz, and the opening of the electronic expansion valve is adaptively adjusted to reduce the size, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0024] When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner is controlled to run in the ultra-quiet mode, the outdoor fan is controlled to run in the high-power mode, the compressor runs at a 10Hz frequency, and the opening of the electronic expansion valve is adaptively adjusted to reduce the size, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0025] Where X is the difference between the motherboard controller temperature T_motherboard and the optimal temperature T_optimal.

[0026] Furthermore, the advanced cooling process includes:

[0027] Switch the air conditioner to heating mode;

[0028] The air conditioner's heating operation parameters are adjusted based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal.

[0029] Furthermore, adjusting the air conditioner heating operation parameters based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal includes:

[0030] When 0℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner and the outdoor fan are both set to medium-low fan speed.

[0031] When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner will be controlled to run at low speed and the outdoor fan will run at medium speed.

[0032] When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner will be controlled to run in silent mode, and the outdoor fan will be controlled to run in high-power mode.

[0033] Furthermore, the motherboard controller temperature T is the highest temperature of any electronic module on the motherboard.

[0034] The photovoltaic air conditioner control method provided by this invention ensures indoor thermal comfort while adjusting the system operation to dissipate heat from the main board, thereby extending the service life of the main board and its electrical components.

[0035] Secondly, the present invention provides an air conditioning system, which is a photovoltaic air conditioning system, for performing the method.

[0036] Furthermore, the air conditioning system includes:

[0037] The air conditioning module, including an indoor unit and an outdoor unit, is used to regulate the indoor environment and recover excess heat for thermal management of the main board.

[0038] Photovoltaic modules are used to collect solar energy to generate electricity;

[0039] A control module is installed inside the outdoor unit and is electrically connected to both the photovoltaic module and the air conditioning module, and is used to regulate the operating logic of the air conditioning module and the photovoltaic module.

[0040] A temperature detection module is installed inside the control module to detect the module temperature of the motherboard controller.

[0041] The air conditioning system provided by this invention does not require the addition of extra structural components. It can ensure the high-temperature operation reliability of the mainboard controller by simply adjusting the operating logic. It saves the maintenance cost of the mainboard controller, balances the conflicting relationship between the thermal comfort of the air conditioner and the heat of the mainboard controller, and improves the phenomenon of system performance degradation caused by battery overheating while meeting the thermal comfort of the indoor environment. It also extends the life cycle of the entire photovoltaic air conditioning system and reduces the maintenance cost of the battery system. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0043] Figure 1 is a flowchart of the control method for the photovoltaic air-conditioning system of the present invention;

[0044] Figure 2 is a control flowchart of an embodiment of the control method for the photovoltaic air-conditioning of the present invention;

[0045] Figure 3 is a schematic structural diagram of the air-conditioning system of the present invention.

[0046] In the figure, 1 is the photovoltaic main-board radiator; 2 is the air-conditioning main-board radiator. Detailed implementation manners

[0047] To make the purpose, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other implementation manners obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0048] As Figure 1 shown, the present invention provides a control method for a photovoltaic air-conditioning, which is a temperature management method for the main-board controller. First, it should be noted that when the photovoltaic air-conditioning operates in summer and reaches certain conditions, cooling is required. When the photovoltaic air-conditioning operates in winter, the air-conditioning is in the heating mode. The natural ambient temperature is usually low, and the heat accumulated on the main board will spontaneously conduct heat exchange to the environment, and a relatively low temperature can also be maintained when the air-conditioning stops. At the same time, in the heating mode, the outdoor unit blows cold air, so it can be considered that T_main board < T_optimal in winter, and the electronic components on the main board have good low-temperature durability and will not be affected by the low-temperature environment during operation. Therefore, no heat dissipation is required for the main board in winter, and the air-conditioning can operate normally. Therefore, the control method of the present invention is for the control method of the photovoltaic air-conditioning in the summer working condition;

[0049] Specifically, the method includes:

[0050] S10. Determine whether the main-board controller needs to be cooled;

[0051] Obtain the operating season of the air-conditioning;

[0052] When the obtained operating season of the air-conditioning is summer, obtain the temperature T_main board of the main-board controller;

[0053] When the motherboard controller temperature T_motherboard is greater than or equal to the preset optimal temperature T_optimal, it is determined that cooling is required.

[0054] When the motherboard controller temperature T_motherboard is less than the preset optimal temperature T_optimal, it is determined that no cooling is needed. This indicates that the motherboard has little heat buildup and there is no need to adjust the air conditioner's operating logic to dissipate heat from the motherboard. The air conditioner can operate normally.

[0055] S20. When the judgment result indicates that cooling is required, obtain indoor environmental parameters;

[0056] S30. Based on the acquired indoor environmental parameters, determine whether the indoor environment has reached the operating point;

[0057] Based on the judgment results, different cooling processes are executed, specifically:

[0058] S40. When the indoor environmental parameters do not reach the operating point, perform the primary cooling treatment step.

[0059] S50. When the indoor environmental parameters reach the operating point, execute the advanced cooling treatment procedure.

[0060] This invention addresses the problem of heat accumulation in controllers during long-term operation, while balancing the conflicting relationship between air conditioning thermal comfort (whether the indoor environmental conditions have stabilized and the thermal management of the controller system is carried out under the premise of meeting the thermal comfort needs of the human body) and the heat required by the controller. It proposes a control method for a photovoltaic air conditioning system, which alleviates the heat accumulation problem of the controller by adjusting the speed of the indoor and outdoor fans, the frequency of the compressor, and the opening of the electronic expansion valve.

[0061] Whether the indoor environmental parameters have reached the operating conditions refers to whether the indoor ambient temperature has reached the preset temperature.

[0062] like Figure 2 The diagram shown is a control flowchart of one embodiment of the control method of the present invention. In this embodiment, the primary cooling process is performed, including:

[0063] The air conditioner continues to run in cooling mode;

[0064] Based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal, the air conditioner cooling operation parameters are adjusted, including:

[0065] When 0℃ < mainboard controller temperature T_mainboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner is controlled to run at a medium-low speed, the outdoor fan is controlled to run at a medium speed, the compressor runs at a 10Hz frequency, and the opening of the electronic expansion valve is adaptively adjusted to a smaller value, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0066] When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner is controlled to run in silent mode, the outdoor fan is controlled to run in medium-high fan mode, the compressor runs at a reduced frequency of 10Hz, and the opening of the electronic expansion valve is adaptively adjusted to reduce the size, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0067] When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner is controlled to run in the ultra-quiet mode, the outdoor fan is controlled to run in the high-power mode, the compressor runs at a 10Hz frequency, and the opening of the electronic expansion valve is adaptively adjusted to reduce the size, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate.

[0068] Where X is the difference between the motherboard controller temperature T_motherboard and the optimal temperature T_optimal.

[0069] The following explanation uses Table 1 as an example;

[0070] When the air conditioner needs to cool in summer, if the main board temperature T is greater than or equal to the optimal temperature T, it means that the main board needs to be cooled down. At this time, it is necessary to determine whether the indoor environment has reached the operating point and adjust the air conditioner operation accordingly.

[0071] When the indoor environment has not reached its operating point, the air conditioner operates in cooling mode. The indoor unit cools normally, adjusting the compressor frequency, indoor and outdoor unit fan speeds, or fan speeds based on the difference between the mains temperature and its optimal temperature. The greater the temperature difference, the more the compressor frequency decreases until it reaches the lower limit of the cooling frequency. The electronic expansion valve opening decreases (the opening of the electronic expansion valve regulates the refrigerant mass flow rate, which is the flow rate of refrigerant circulating in the system per unit time, ensuring that the temperature and pressure of the refrigerant in the evaporator remain at their optimal state). The compressor frequency reduction decreases the refrigerant mass flow rate in the system, but the indoor unit can still deliver cooling to regulate the indoor environment; however, the time required for the indoor environment to reach its operating point increases. The electronic expansion valve opening adaptively decreases to balance system pressure. With the reduced mass flow rate, the heat released from the external condenser also decreases, reducing the impact on the mains radiator. By increasing the outdoor fan speed, the heat from the outdoor unit condenser and mains radiator can be quickly dissipated, achieving mains cooling. The compressor frequency is adjusted according to the temperature difference between the mains temperature and its optimal temperature; for every degree Celsius increase in temperature difference, the compressor frequency decreases by 10 Hz (the lower limit of the compressor frequency is 10 Hz).

[0072] The table below shows the relationship between the fan speed within the difference range, the corresponding speed gear, the outdoor fan speed, and the corresponding speed gear:

[0073] Table 1

[0074]

[0075] like Figure 2The diagram shown is a control flowchart of one embodiment of the control method of the present invention. In this embodiment, an advanced cooling process is performed, including:

[0076] Switch the air conditioner to heating mode;

[0077] Based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal, the air conditioner heating operation parameters are adjusted, including:

[0078] When 0℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner and the outdoor fan are both set to medium-low fan speed.

[0079] When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner will be controlled to run at low speed and the outdoor fan will run at medium speed.

[0080] When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner will be controlled to run in silent mode, and the outdoor fan will be controlled to run in high-power mode.

[0081] The following explanation uses Table 2 as an example;

[0082] When the air conditioner needs to cool in summer, if the main board temperature T is greater than or equal to the optimal temperature T, it means that the main board needs to be cooled down. At this time, it is necessary to determine whether the indoor environment has reached the operating point and adjust the air conditioner operation accordingly.

[0083] When the indoor environment reaches its operating point, the air conditioner switches to heating mode. The indoor unit speed is reduced, while the outdoor fan speed is increased. The indoor unit heats, but the airflow is relatively small, minimizing its impact on the dry-bulb temperature of the indoor environment. The outdoor unit cools; the increased outdoor fan speed allows for faster heat transfer to the mains heatsink, thus cooling the mains circuit board. The indoor and outdoor fan speeds or corresponding settings are adjusted based on the difference between the mains circuit board temperature and the optimal temperature.

[0084] The table below shows the relationship between the fan speed within the difference range, the corresponding speed gear, the outdoor fan speed, and the corresponding speed gear:

[0085] Table 2

[0086]

[0087] It should be noted that the different fan baffles set in the indoor unit during the control process are mainly to minimize the temperature difference between the evaporator and the condenser, which will reduce the power consumption and at the same time avoid affecting the stability of the inner loop.

[0088] Furthermore, the motherboard controller temperature T is the highest temperature of any electronic module on the motherboard.

[0089] The photovoltaic air conditioner control method provided by this invention ensures indoor thermal comfort while adjusting the system operation to dissipate heat from the main board, thereby extending the service life of the main board and its electrical components.

[0090] like Figure 3 As shown, the present invention provides an air conditioning system, which is a photovoltaic air conditioning system, used to execute the method.

[0091] Furthermore, the air conditioning system includes:

[0092] The air conditioning module, including the indoor unit and the outdoor unit, is used to regulate the indoor environment and recover excess heat (recovering excess heat means that when the air conditioner regulates the indoor environment and meets the set operating conditions of the indoor environment, it recovers the excess heat from the air conditioner's cooling and heating, in addition to maintaining the stability of the inner ring temperature, and uses it for thermal management of the main board to cool down the main board).

[0093] A photovoltaic module is used to collect solar energy to generate electricity. A photovoltaic module includes a photovoltaic inverter and other devices for switching AC current and DC current, several energy storage battery packs, an inverter and its piping equipment and structure connected to the system, several photovoltaic panels for collecting solar energy, and several energy storage battery packs, an inverter and its piping equipment and structure connected to the system.

[0094] The control module is integrated inside the outdoor unit and is electrically connected to both the photovoltaic module and the air conditioning module. It is used to regulate the operating logic of the air conditioning module and the photovoltaic module. The control module includes a control motherboard, which contains several electrical components.

[0095] The temperature detection module is installed inside the control module and is used to detect the module temperature of the motherboard controller.

[0096] The heat on the control board originates from the electrical components running on it via current. Because the control board is installed inside the outdoor unit of the air conditioner, the space is relatively enclosed, making it difficult for the generated heat to conduct outwards. Heat exchange primarily relies on the metal heat sink fins (heat exchanger) and the environment. The control board for the photovoltaic module needs to be constantly on. During the day, when sunlight is abundant, the internal current switching is high and frequent. At night or when sunlight intensity is low, the internal current switching is less, and at night, only the controller components that maintain photovoltaic power supply need to operate. The heat generated by the electrical components on the control board over a long period can accumulate and potentially damage the control board and its components, affecting the reliability of high-temperature operation. Therefore, the air conditioner's operating logic can be adjusted to utilize the outdoor fan for thermal management of the control board.

[0097] like Figure 3As shown, heat exchange on the mainboard occurs through heat accumulation from electronic components on the mainboard, which is then conducted to the metal heat sink fins (photovoltaic mainboard heat sink 1). The metal heat sink fins (heat sink) exchange heat with the outdoor fan. The outdoor fan, by rotating, releases the heat from the refrigerant and the air conditioner mainboard heat sink 2 into the environment (when the outdoor unit is in cooling mode, the outdoor fan, by rotating, brings cooling energy to the air conditioner mainboard heat sink 2 for heat exchange and releases it into the environment). When the heating mode is set on the remote control, the indoor unit of the air conditioner will emit hot air. Since the indoor unit releases heat, the outdoor unit absorbs this heat, which is the so-called "outdoor cooling." The outdoor unit's condenser will absorb heat and frost over. This cooling energy can be transferred to the photovoltaic mainboard heat sink 1 by the rotation of the outdoor fan, thus lowering its temperature.

[0098] The motherboard has a temperature detection module used to detect the module temperature of the motherboard controller. The motherboard module is not limited to a single electronic component. The highest temperature detected by any electronic module on the motherboard is used as the judgment temperature. This standard is used to manage the temperature of the motherboard controller, which can ensure the high-temperature operation reliability of the motherboard controller.

[0099] The air conditioning system provided by this invention does not require the addition of extra structural components. It can ensure the high-temperature operation reliability of the mainboard controller by simply adjusting the operating logic. It saves the maintenance cost of the mainboard controller, balances the conflicting relationship between the thermal comfort of the air conditioner and the heat of the mainboard controller, and improves the phenomenon of system performance degradation caused by battery overheating while meeting the thermal comfort of the indoor environment. It also extends the life cycle of the entire photovoltaic air conditioning system and reduces the maintenance cost of the battery system.

[0100] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control method for a photovoltaic air conditioner, characterized in that, A temperature management method for a motherboard controller, the method comprising: Determine if the motherboard controller needs cooling; When the determination indicates that cooling is required, obtain indoor environmental parameters; Based on the acquired indoor environmental parameters, determine whether the indoor environment has reached the operating point; Based on the judgment results, different cooling processes are executed, including: When indoor environmental parameters do not reach the operating point, perform primary cooling procedures, including: The air conditioner continues to operate in cooling mode; The air conditioning cooling operation parameters are adjusted based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optim. When indoor environmental parameters reach the operating point, advanced cooling procedures are executed, including: Switch the air conditioner to heating mode; The air conditioner's heating operation parameters are adjusted based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal.

2. The method according to claim 1, characterized in that, The determination of whether the motherboard controller needs cooling includes: Obtain the air conditioning operating season; When the air conditioner is operating in summer, obtain the mainboard controller temperature T_mainboard. When the motherboard controller temperature T_motherboard is greater than or equal to the preset optimal temperature T_optimal, it is determined that cooling is required. If the motherboard controller temperature T_motherboard is less than the preset optimal temperature T_optimal, then cooling is not required.

3. The method according to claim 1, characterized in that, The method of adjusting the air conditioning cooling operation parameters based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal includes: When 0℃ < mainboard controller temperature T_mainboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner is controlled to run at a medium-low speed, the outdoor fan is controlled to run at a medium speed, the compressor runs at a 10XHZ frequency, and the opening of the electronic expansion valve is adaptively adjusted to a smaller value, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate. When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner is controlled to run in silent mode, the outdoor fan is controlled to run in medium-high fan mode, the compressor is reduced to 10XHZ frequency, and the opening of the electronic expansion valve is adaptively adjusted to reduce, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate. When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner is controlled to run in the ultra-quiet mode, the outdoor fan is controlled to run in the high-power mode, the compressor is reduced to a 10XHZ frequency, and the opening of the electronic expansion valve is adaptively adjusted to a smaller value, so as to adaptively adjust and balance the system pressure and refrigerant mass flow rate. Where X is the difference between the motherboard controller temperature T_motherboard and the optimal temperature T_optimal.

4. The method according to claim 1, characterized in that, The method of adjusting the air conditioner heating operation parameters based on the temperature difference between the mainboard controller temperature T_mainboard and the preset optimal temperature T_optimal includes: When 0℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 2℃, the indoor fan of the air conditioner and the outdoor fan are both set to medium-low fan speed. When 2℃ < motherboard controller temperature T_motherboard-optimal temperature T_optimal ≤ 6℃, the indoor fan of the air conditioner will be controlled to run at low speed and the outdoor fan will run at medium speed. When the mainboard controller temperature T_mainboard-optimal temperature T_optimal > 6℃, the indoor fan of the air conditioner will be controlled to run in silent mode, and the outdoor fan will be controlled to run in high-power mode.

5. The method according to claim 2, characterized in that, The motherboard controller temperature T is the highest temperature of any electronic module on the motherboard.

6. An air conditioning system, characterized in that, A photovoltaic air conditioning system for performing the method as described in any one of claims 1-4.

7. The air conditioning system according to claim 6, characterized in that, The air conditioning system includes: The air conditioning module, including an indoor unit and an outdoor unit, is used to regulate the indoor environment and recover excess heat for thermal management of the main board. Photovoltaic modules are used to collect solar energy to generate electricity; A control module is installed inside the outdoor unit and is electrically connected to both the photovoltaic module and the air conditioning module, and is used to regulate the operating logic of the air conditioning module and the photovoltaic module. A temperature detection module is installed inside the control module to detect the module temperature of the motherboard controller.

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