Temperature and humidity control method and device of air conditioner and air conditioner

Abstract

The invention provides a temperature and humidity control method and device of an air conditioner and the air conditioner. The temperature and humidity control method of the air conditioner comprises the steps that under the condition that it is determined that temperature and humidity adjusting requirements comprise dehumidification requirements, the power supply mode of the air conditioner is controlled according to the electric power state of a photovoltaic power supply system of the air conditioner; the operation frequency of a compressor of the air conditioner is controlled to be increased on the basis of the current operation frequency; the power supply mode of the air conditioner comprises a pure photovoltaic power supply mode in which the photovoltaic power supply system supplies power to the air conditioner independently and a photovoltaic hybrid power supply mode in which one of the energy storage power supply system and the power grid power supply system is matched with the photovoltaic power supply system to supply power to the air conditioner. Thus, when the dehumidification requirement is met, photovoltaic power is utilized, that is, the air conditioner can achieve the dehumidification function when utilizing the photovoltaic power, and the problem that in the related technology, an air conditioner cannot dehumidify the indoor environment when utilizing electric energy of a photovoltaic power supply system is solved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a method, device and device for controlling temperature and humidity in an air conditioner. Background Technology

[0002] With increasing global awareness of energy conservation, emission reduction, and environmental protection, utilizing clean energy sources such as solar energy has become an important trend in technological development. In the air conditioning field, solar air conditioners, as an innovative product combining photovoltaic power generation technology with traditional air conditioning technology, effectively reduce dependence on mains electricity and decrease fossil fuel consumption by using solar energy to drive the air conditioner compressor and other electrical components, resulting in significant economic benefits and environmental value.

[0003] However, existing solar-powered air conditioners have certain design limitations. When using electricity from a photovoltaic power system, their control system typically only controls the indoor temperature and cannot dehumidify. When the system receives a dehumidification command or both cooling and dehumidification commands, the air conditioner automatically determines that the photovoltaic power cannot meet the complex demand and automatically cuts off the photovoltaic power supply, switching to mains power. This forces the air conditioner to consume mains electricity to meet the user's dehumidification needs, even though it could utilize clean and free solar energy. This not only violates the original design intent of photovoltaic power supply, reducing the overall energy-saving efficiency and economy of the product, but also fails to fully leverage the advantages of solar energy as a core energy source, impacting the user's green and energy-saving experience.

[0004] Therefore, how to solve the problem that air conditioners cannot dehumidify the indoor environment when using electricity from photovoltaic power systems has become an important technical problem for those skilled in the art. Summary of the Invention

[0005] This invention provides a method, device, and air conditioner for controlling temperature and humidity, thereby addressing the shortcomings of air conditioners in related technologies that cannot dehumidify the indoor environment when using electricity from a photovoltaic power supply system.

[0006] This invention provides a method for controlling temperature and humidity in an air conditioner, comprising: Obtain temperature and humidity control requirements; When the temperature and humidity regulation requirements include dehumidification requirements, the power supply mode of the air conditioner is controlled according to the power status of the photovoltaic power supply system of the air conditioner, and the operating frequency of the air conditioner compressor is increased based on the current operating frequency. The power supply mode of the air conditioner includes a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. The photovoltaic power supply mode is in which the photovoltaic power supply system supplies power to the air conditioner alone, and the photovoltaic hybrid power supply mode is in which one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

[0007] With this setup, regardless of whether the photovoltaic power supply system has sufficient power, it can ensure that photovoltaic power is used first and to the maximum extent when performing dehumidification. In other words, the air conditioner can achieve dehumidification when using photovoltaic power, which solves the problem in related technologies that air conditioners cannot dehumidify the indoor environment when using the power of the photovoltaic power supply system.

[0008] According to a temperature and humidity control method for an air conditioner provided by the present invention, when it is determined that the temperature and humidity adjustment requirement is only dehumidification, the method further includes controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner, and controlling the operating frequency of the air conditioner compressor to increase based on the current operating frequency, comprising: The power supply mode of the air conditioner is kept in the pure photovoltaic power supply mode. Obtain the real-time power generation of the photovoltaic power supply system; Based on the real-time power generation, a first operating frequency is determined, wherein the first operating frequency is the maximum operating frequency of the compressor allowed by the real-time power generation. The operating frequency of the compressor is increased to the first operating frequency.

[0009] This setup, combined with the steps described above, achieves an adaptive dehumidification strategy guided by the power generation of the photovoltaic power system. When dehumidification is the only requirement, it can convert all available free photovoltaic power into maximum dehumidification capacity in real time, without reservation. By dynamically matching the compressor frequency to the upper limit allowed by the real-time power generation, it not only achieves dehumidification of the indoor environment while utilizing the power of the photovoltaic system, but also ensures that comfort functions are achieved while maximizing the utilization rate of photovoltaic energy.

[0010] A method for controlling temperature and humidity in an air conditioner according to the present invention further includes: The speed of the indoor fan of the air conditioner is reduced from the current speed.

[0011] This setup reduces the speed of the indoor fan, slowing down the airflow through the evaporator and extending the contact time between the air and the low-temperature evaporator surface. This allows water vapor in the air to condense more fully upon cooling, thereby improving dehumidification efficiency.

[0012] Meanwhile, when only dehumidification is needed, reducing the fan speed decreases the total amount of cold air processed and returned to the room per unit time. With a reduced overall airflow, the mixing and heat exchange process with the existing indoor air becomes more moderate, weakening the impact of the cold air on the overall indoor temperature. The air conditioner's output air will not rapidly and extensively lower the overall indoor temperature, thus effectively removing humidity while avoiding a sudden drop in room temperature due to excessive cooling capacity, maintaining a comfortable level of comfort.

[0013] According to a temperature and humidity control method for an air conditioner provided by the present invention, when the temperature and humidity adjustment requirement is determined to be both dehumidification and cooling, the method further includes controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner, and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, comprising: Obtain the second operating frequency, which is the maximum operating frequency of the compressor allowed by the current ambient temperature; Based on the power status of the photovoltaic power supply system and the second operating frequency, determine the feasibility of increasing the operating frequency of the compressor to the second operating frequency under the pure photovoltaic power supply mode; If the power state of the photovoltaic power supply system allows the compressor's operating frequency to increase to the second operating frequency, the power supply mode of the air conditioner is controlled to remain in the pure photovoltaic power supply mode, and the operating frequency of the compressor is controlled to increase to the second operating frequency.

[0014] This setup, combined with the steps outlined above, constructs an intelligent, high-performance operation strategy that prioritizes and maximizes the use of photovoltaic energy to meet the stringent requirements of both cooling and dehumidification. This not only ensures a rapid response to the urgent needs of both cooling and dehumidification but also achieves the ideal result of optimal comfort with zero mains electricity costs, demonstrating the core value of air conditioners in meeting complex demands through high efficiency, energy saving, and intelligence.

[0015] According to a method for controlling the temperature and humidity of an air conditioner provided by the present invention, the method further includes controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner, and controlling the operating frequency of the air conditioner compressor to increase based on the current operating frequency. If it is determined that the power status of the photovoltaic power supply system does not allow the compressor's operating frequency to increase to the second operating frequency, the power supply mode of the air conditioner is switched to the photovoltaic hybrid power supply mode, and the operating frequency of the compressor is increased to the second operating frequency.

[0016] This configuration, which increases the compressor's operating frequency to the second operating frequency, ensures that the air conditioner can achieve its strongest cooling and dehumidification capabilities under the current operating conditions, thereby quickly responding to the dual needs of cooling and dehumidification and rapidly improving the comfort of the indoor environment.

[0017] By introducing grid power or energy storage systems as supplementary power, when the photovoltaic power supply system is insufficient, these systems can assist in providing power, thus addressing the issue that relying solely on photovoltaic power cannot meet high-performance operation requirements. Even when the photovoltaic power supply system is insufficient, it can still prioritize and maximize the use of photovoltaic power, rather than completely abandoning it and switching entirely to grid power, thereby improving the utilization rate of clean energy and reducing operating costs.

[0018] According to a temperature and humidity control method for an air conditioner provided by the present invention, after controlling the operating frequency of the compressor to increase to the second operating frequency, the method further includes: Obtain the indoor ambient temperature corresponding to the air conditioner; When the indoor ambient temperature is determined to drop below the target temperature, and the difference between the target temperature and the indoor ambient temperature is greater than or equal to a preset difference, the power supply mode of the air conditioner is switched to the pure photovoltaic power supply mode.

[0019] This configuration allows the air conditioner to complete its primary tasks of rapid cooling and dehumidification via a photovoltaic hybrid power supply mode. After this initial phase, the demand for cooling capacity decreases, and the system can be quickly switched back to pure photovoltaic power supply mode. This immediately stops reliance on grid power or auxiliary power sources like energy storage systems, maximizing the use of free, clean solar energy for subsequent temperature maintenance. This dynamic optimization of energy utilization reduces the overall operating cost and energy consumption of the air conditioner while prioritizing user comfort, achieving a balance between user comfort and energy economy at different operating stages.

[0020] According to a temperature and humidity control method for an air conditioner provided by the present invention, when it is determined that the temperature and humidity adjustment requirement is only to cool down, the rotation speed of the indoor fan of the air conditioner is increased based on the current rotation speed, and the compressor is controlled to maintain the current operating frequency.

[0021] This setup, by increasing the speed of the indoor fan, accelerates indoor air circulation, allowing more air to flow over the low-temperature evaporator surface, improving heat exchange efficiency, and enabling users to feel the indoor temperature drop more quickly, thus achieving a rapid cooling effect.

[0022] At the same time, by keeping the compressor at its current operating frequency, when only cooling is needed and dehumidification is not required, the unnecessary increase in energy consumption caused by increasing the cooling capacity is avoided. This is a precise and energy-saving control strategy. It prioritizes meeting the user's perceived cooling needs by adjusting the air volume, rather than blindly increasing the total cooling capacity of the system, thereby optimizing energy efficiency while ensuring comfort.

[0023] According to a method for controlling the temperature and humidity of an air conditioner provided by the present invention, the step of increasing the rotational speed of the indoor fan of the air conditioner based on the current rotational speed includes: Obtain the indoor ambient temperature corresponding to the air conditioner; Based on the indoor ambient temperature and the target temperature, determine the difference between the indoor ambient temperature and the target temperature; The increase in the rotational speed of the indoor fan is determined based on the difference between the indoor ambient temperature and the target temperature. Based on the speed increase value, the speed of the indoor fan is controlled to increase by the speed increase value based on the current speed.

[0024] This setup, by acquiring the indoor ambient temperature in real time and comparing it with the target temperature, precisely quantifies the cooling demand, thereby dynamically and precisely determining the increase in indoor fan speed. This not only achieves intelligent adjustment of cooling intensity but also ensures a smooth transition in airflow speed, avoiding discomfort caused by sudden changes in airflow and optimizing user comfort.

[0025] This invention provides a temperature and humidity control device for an air conditioner, comprising: The acquisition module is used to acquire temperature and humidity control requirements; The control module is used to, when determining that the temperature and humidity regulation requirements include dehumidification requirements, switch the power supply mode of the air conditioner according to the power status of the photovoltaic power supply system of the air conditioner, and control the operating frequency of the air conditioner compressor to increase based on the current operating frequency. The power supply mode of the air conditioner includes a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. The photovoltaic power supply mode is in which the photovoltaic power supply system supplies power to the air conditioner alone, and the photovoltaic hybrid power supply mode is in which one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

[0026] The present invention also provides an air conditioner capable of performing the above-described air conditioner temperature and humidity control method, or including the above-described air conditioner temperature and humidity control device.

[0027] The temperature and humidity control method for an air conditioner provided by this invention first obtains the temperature and humidity adjustment requirements. Then, if the temperature and humidity adjustment requirements include dehumidification requirements, the power supply mode of the air conditioner is controlled according to the power status of the photovoltaic power supply system, and the operating frequency of the air conditioner's compressor is increased based on the current operating frequency. The power supply modes of the air conditioner include a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. In the photovoltaic power supply mode, the photovoltaic power supply system supplies power to the air conditioner alone. In the photovoltaic hybrid power supply mode, one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner. That is, when a temperature and humidity adjustment requirement including dehumidification is received, the use of photovoltaic power is not immediately abandoned. Instead, the real-time power status of the photovoltaic power supply system is first assessed. Based on the assessment results, and combined with the requirement to increase the compressor operating frequency necessary for dehumidification, the power supply mode of the air conditioner is selected. If the power status of the photovoltaic power supply system is sufficient to support the increased compressor frequency to meet the dehumidification requirements, the air conditioner can be kept in pure photovoltaic power supply mode, fully utilizing photovoltaic power to complete dehumidification. If the power supply of the photovoltaic power system is insufficient to support the increased compressor frequency, the air conditioner switches to a photovoltaic hybrid power supply mode. While utilizing photovoltaic power, it is supplemented by an energy storage power supply system or the grid power supply system. This setup ensures that photovoltaic power is prioritized and maximized when performing dehumidification, regardless of whether the photovoltaic power supply system has sufficient power. In other words, the air conditioner can achieve dehumidification while using photovoltaic power, solving the problem in related technologies where air conditioners cannot dehumidify the indoor environment when using photovoltaic power. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a flowchart of the temperature and humidity control method for an air conditioner provided by the present invention.

[0030] Figure 2 This is a flowchart of a method for controlling the temperature and humidity of an air conditioner when only dehumidification is required, provided by the present invention.

[0031] Figure 3This is a flowchart of a method for controlling the temperature and humidity of an air conditioner when both dehumidification and cooling are required, as provided by the present invention. Detailed Implementation

[0032] 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.

[0033] The following is combined Figures 1 to 3 The present invention describes a method for controlling temperature and humidity in an air conditioner.

[0034] like Figures 1 to 3 As shown, the temperature and humidity control method for an air conditioner provided in this embodiment of the invention includes steps 110 to 120.

[0035] Step 110: Obtain temperature and humidity control requirements.

[0036] Step 120: After determining the temperature and humidity regulation requirements, including dehumidification requirements, control the power supply mode of the air conditioner according to the power status of the photovoltaic power supply system of the air conditioner, and increase the operating frequency of the air conditioner compressor based on the current operating frequency. The power supply mode of the air conditioner includes a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. In the photovoltaic power supply mode, the photovoltaic power supply system supplies power to the air conditioner alone. In the photovoltaic hybrid power supply mode, one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

[0037] Temperature and humidity control needs include those requiring only cooling, those requiring only dehumidification, and those requiring both dehumidification and cooling.

[0038] During the operation of the air conditioner, users can input their temperature and humidity requirements into the air conditioner. For example, users can input a target temperature and a target humidity into the air conditioner, and the air conditioner will determine the temperature and humidity adjustment requirements based on the current actual temperature and humidity.

[0039] In some cases, users can also input only dehumidification or cooling commands into the air conditioner. When the air conditioner receives a dehumidification command, it determines that the temperature and humidity adjustment requirement is only dehumidification. When the air conditioner receives a cooling command, it determines that the temperature and humidity adjustment requirement is only cooling.

[0040] Therefore, when the temperature and humidity regulation requirement includes the dehumidification requirement, there are two situations: one is that the temperature and humidity regulation requirement is only dehumidification, and the other is that both dehumidification and cooling are required.

[0041] The essence of air conditioner dehumidification is to utilize the principle of refrigeration to lower the surface temperature of the indoor unit's evaporator below the dew point of the air. When hot, humid air flows through it, water vapor condenses into water droplets upon contact with the condenser. The compressor's operating frequency directly determines the power of the refrigeration system and the refrigerant circulation speed. When dehumidifying, air conditioners need to increase the compressor's operating frequency to enhance cooling capacity and quickly create an extremely low temperature on the evaporator surface. This surface effectively draws moisture from the flowing air, achieving rapid and deep dehumidification.

[0042] Increasing the compressor's operating frequency will correspondingly increase the power requirements of the power supply system. In the temperature and humidity control method for air conditioners provided in this embodiment of the invention, when a temperature and humidity adjustment request including dehumidification is received, the use of photovoltaic power is not immediately abandoned. Instead, the real-time power status of the photovoltaic power supply system is first assessed. Based on the assessment results, and considering the requirement to increase the compressor's operating frequency for dehumidification, the power supply mode for the air conditioner is selected.

[0043] If the power supply of the photovoltaic power system is sufficient to support the increased compressor frequency to meet the dehumidification requirements, the air conditioner can be kept running in pure photovoltaic power supply mode, making full use of photovoltaic power to complete the dehumidification.

[0044] If the power supply of the photovoltaic power system is insufficient to support the increased compressor frequency, the air conditioner will switch to a photovoltaic hybrid power supply mode, utilizing photovoltaic power while being supplemented by an energy storage power supply system or a grid power supply system.

[0045] With this setup, regardless of whether the photovoltaic power supply system has sufficient power, it can ensure that photovoltaic power is used first and to the maximum extent when performing dehumidification. In other words, the air conditioner can achieve dehumidification when using photovoltaic power, which solves the problem in related technologies that air conditioners cannot dehumidify the indoor environment when using the power of the photovoltaic power supply system.

[0046] In some embodiments of the present invention, when the temperature and humidity regulation requirement is determined to be only dehumidification, the steps in step 120 above, which involve controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, specifically include steps 1211 to 1214.

[0047] Step 1211: Control the power supply mode of the air conditioner to remain in pure photovoltaic power supply mode.

[0048] When dehumidification is only required, cooling is unnecessary, which improves comfort rather than achieving a predetermined, maximum dehumidification effect at any cost. Therefore, in this case, it is sufficient to prioritize and fully utilize the electricity provided by the photovoltaic power supply system, making the most of its power. There is no need to forcibly increase the power supply from other systems, maximizing energy conservation and emission reduction, avoiding unnecessary mains power consumption, and demonstrating the core economic and environmental value of photovoltaic air conditioning.

[0049] Step 1212: Obtain the real-time power generation of the photovoltaic power supply system.

[0050] This step provides real-time data for subsequent precise control, ensuring the dynamic adaptability and accuracy of the control strategy. It enables the air conditioner to intelligently adjust its operating status according to actual operating conditions such as light intensity, rather than adopting a fixed and inefficient control mode.

[0051] Step 1213: Determine the first operating frequency based on the real-time power generation. The first operating frequency is the maximum operating frequency of the compressor allowed by the real-time power generation.

[0052] This strategy achieves precise matching between load and available power, making full use of all available photovoltaic power and converting it into power to improve dehumidification capacity, avoiding the idleness and waste of photovoltaic energy, and providing the technical prerequisite for achieving the best dehumidification effect in pure photovoltaic power supply mode.

[0053] Step 1214: Increase the operating frequency of the compressor to the first operating frequency.

[0054] This is a key step in achieving efficient dehumidification. By increasing the compressor frequency to the highest level that the real-time power generation of the photovoltaic power system can support, the surface temperature of the evaporator can be quickly reduced to below the air dew point, thereby improving dehumidification efficiency and effect, and enhancing the user's comfort experience in humid environments.

[0055] Steps 1211 to 1214 above collectively implement an adaptive dehumidification strategy guided by the power generation of the photovoltaic power supply system. When dehumidification is the only requirement, all available photovoltaic power can be converted into maximum dehumidification capacity in real time without reservation. By dynamically matching the compressor frequency to the upper limit allowed by the real-time power generation, not only is dehumidification of the indoor environment achieved while utilizing the power of the photovoltaic power supply system, but also the maximization of photovoltaic energy utilization is ensured while achieving comfort functions.

[0056] In this embodiment, when the temperature and humidity regulation requirement is only dehumidification, while increasing the operating frequency of the compressor, the speed of the indoor fan of the air conditioner is also reduced from the current speed. Specifically, the indoor fan of the air conditioner has speed settings such as low, medium, high, and strong. In this case, the speed of the indoor fan can be reduced to the lowest setting, low.

[0057] By reducing the speed of the indoor fan, the speed at which air flows through the evaporator can be slowed down, thereby extending the contact time between the air and the surface of the low-temperature evaporator. This allows water vapor in the air to condense more fully upon cooling, thus improving dehumidification efficiency.

[0058] Meanwhile, when only dehumidification is needed, reducing the fan speed decreases the total amount of cold air processed and returned to the room per unit time. With a reduced overall airflow, the mixing and heat exchange process with the existing indoor air becomes more moderate, weakening the impact of the cold air on the overall indoor temperature. The air conditioner's output air will not rapidly and extensively lower the overall indoor temperature, thus effectively removing humidity while avoiding a sudden drop in room temperature due to excessive cooling capacity, maintaining a comfortable level of comfort.

[0059] In other embodiments of the present invention, when the temperature and humidity regulation requirement is determined to be both dehumidification and cooling, the steps in step 120 above, which involve controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, specifically include steps 1221 to 1223.

[0060] Step 1221: Obtain the second operating frequency, which is the maximum operating frequency of the compressor allowed by the current ambient temperature.

[0061] When both dehumidification and cooling are required, it indicates that the indoor environment is relatively harsh, causing extreme discomfort to users. It is necessary to quickly break the state of extreme discomfort and achieve a comfortable environment as soon as possible.

[0062] At this point, a gradual, energy-saving adjustment would not significantly improve comfort. In this embodiment, the compressor performance is pushed to its limit instantly, even with a short-term increase in energy consumption, to achieve the fastest possible comfort. In other words, user comfort is prioritized in this situation.

[0063] Step 1221 sets a safe and efficient target upper limit for subsequent frequency increases, ensuring that while the air conditioner pursues ultimate performance, its compressor still operates within the design protection range, thereby avoiding equipment damage or lifespan reduction due to overload operation, and providing a reliable performance benchmark for powerful dehumidification and cooling operations.

[0064] Step 1222: Based on the power status and second operating frequency of the photovoltaic power supply system, determine the feasibility of increasing the compressor's operating frequency to the second operating frequency under pure photovoltaic power supply mode.

[0065] In other words, after determining the maximum operating frequency of the compressor allowed by the current ambient temperature, it is also necessary to consider whether the power status of the photovoltaic power supply system allows the compressor's operating frequency to increase to the maximum operating frequency allowed by the current ambient temperature.

[0066] This judgment step reflects the intelligence of control and the refinement of energy management. It can perform a capacity self-check before increasing the operating frequency. By accurately calculating whether the current photovoltaic power generation can support the compressor to operate at its maximum frequency, it provides a key basis for deciding on the next power supply mode and avoids the problem of system instability caused by insufficient power of the photovoltaic power supply system after forcibly increasing the operating frequency of the compressor.

[0067] Step 1223: If the power status of the photovoltaic power supply system allows the compressor's operating frequency to increase to the second operating frequency, control the air conditioner's power supply mode to remain in pure photovoltaic power supply mode and control the compressor's operating frequency to increase to the second operating frequency.

[0068] When it is confirmed that the photovoltaic power supply system has sufficient photovoltaic power, there is no need to switch the power supply mode of the air conditioner. The power supply mode is kept in pure photovoltaic power supply mode, and the compressor frequency is decisively increased to the maximum value. In this way, relying entirely on clean and free solar energy, the system can respond to and meet the user's dual urgent needs for rapid cooling and powerful dehumidification at the fastest speed, achieving a perfect combination of energy saving and comfort.

[0069] Steps 1221 to 1223 above collectively construct an intelligent, high-performance operation strategy that prioritizes and maximizes the use of photovoltaic energy under the stringent requirements of both cooling and dehumidification. This not only ensures a rapid response when there are urgent needs for both cooling and dehumidification, but also achieves the ideal effect of providing the best comfort experience with zero mains electricity cost, demonstrating the core value of air conditioners in meeting complex needs: high efficiency, energy saving, and intelligence.

[0070] In this embodiment, when the temperature and humidity regulation requirement is both dehumidification and cooling, the steps in step 120 above, which involve controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, also include step 1224.

[0071] Step 1224: If the power status of the photovoltaic power supply system does not allow the compressor's operating frequency to increase to the second operating frequency, control the air conditioner's power supply mode to switch to photovoltaic hybrid power supply mode, and control the compressor's operating frequency to increase to the second operating frequency.

[0072] By increasing the compressor's operating frequency to the second operating frequency, the air conditioner can achieve its strongest cooling and dehumidification capabilities under the current operating conditions, thereby quickly responding to the dual needs of cooling and dehumidification and rapidly improving the comfort of the indoor environment.

[0073] By introducing grid power or energy storage systems as supplementary power, when the photovoltaic power supply system is insufficient, these systems can assist in providing power, thus addressing the issue that relying solely on photovoltaic power cannot meet high-performance operation requirements. Even when the photovoltaic power supply system is insufficient, it can still prioritize and maximize the use of photovoltaic power, rather than completely abandoning it and switching entirely to grid power, thereby improving the utilization rate of clean energy and reducing operating costs.

[0074] In a further embodiment, after controlling the compressor's operating frequency to increase to a second operating frequency, steps 1225 and 1226 are also included.

[0075] Step 1225: Obtain the indoor ambient temperature corresponding to the air conditioner.

[0076] By monitoring indoor ambient temperature in real time, accurate data input is provided for subsequent intelligent control strategies, ensuring that control decisions can be dynamically adjusted according to actual environmental changes, which is the foundation for achieving the dual goals of energy saving and comfort.

[0077] Step 1226: When the indoor ambient temperature is determined to be lower than the target temperature, and the difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset difference, control the power supply mode of the air conditioner to switch to pure photovoltaic power supply mode.

[0078] After the air conditioner completes its primary tasks of rapid cooling and dehumidification using a photovoltaic hybrid power supply mode, the demand for cooling capacity decreases. At this point, promptly reverting to a pure photovoltaic power supply mode immediately stops relying on auxiliary power sources such as the grid or energy storage systems, maximizing the use of free, clean solar energy for subsequent temperature maintenance. This achieves dynamic optimization of energy utilization. Thus, while prioritizing user comfort, it reduces the overall operating cost and energy consumption of the air conditioner, achieving a balance between user comfort and energy economy at different operating stages.

[0079] It should be noted that when the temperature and humidity control requirements are determined to be both dehumidification and cooling, while increasing the operating frequency of the air conditioner's compressor, the indoor fan speed can also be adjusted to the medium setting.

[0080] In some other embodiments of the present invention, when it is determined that the temperature and humidity regulation requirement is only to cool down, the speed of the indoor fan of the air conditioner is increased based on the current speed, and the compressor is controlled to maintain the current operating frequency.

[0081] By increasing the speed of the indoor fan, the circulation of indoor air can be accelerated, allowing more air to flow over the low-temperature evaporator surface, improving heat exchange efficiency, and enabling users to feel the indoor temperature drop more quickly, thus achieving a rapid cooling effect.

[0082] At the same time, by keeping the compressor at its current operating frequency, when only cooling is needed and dehumidification is not required, the unnecessary increase in energy consumption caused by increasing the cooling capacity is avoided. This is a precise and energy-saving control strategy. It prioritizes meeting the user's perceived cooling needs by adjusting the air volume, rather than blindly increasing the total cooling capacity of the system, thereby optimizing energy efficiency while ensuring comfort.

[0083] In this embodiment, when controlling the indoor fan speed of the air conditioner to increase from the current speed, the indoor ambient temperature corresponding to the air conditioner is first obtained. Then, based on the indoor ambient temperature and the target temperature, the difference between the indoor ambient temperature and the target temperature is determined. Then, based on the difference between the indoor ambient temperature and the target temperature, the increase value of the indoor fan speed is determined. Finally, based on the increase value of the speed, the indoor fan speed is controlled to increase from the current speed by the increase value of the speed.

[0084] By acquiring the indoor ambient temperature in real time and comparing it with the target temperature, the cooling demand can be precisely quantified, allowing for a dynamic and precise determination of the increase in indoor fan speed. This not only enables intelligent adjustment of cooling intensity but also ensures a smooth transition in airflow speed, avoiding discomfort caused by sudden changes in airflow and thus optimizing user comfort.

[0085] Specifically, a mapping relationship can be preset between the increase in indoor fan speed and the difference between indoor ambient temperature and target temperature. After determining the difference between indoor ambient temperature and target temperature, the corresponding increase in indoor fan speed can be determined based on the mapping relationship.

[0086] Alternatively, you can preset the mapping relationship between the indoor fan speed setting and the difference between the indoor ambient temperature and the target temperature. After determining the difference between the indoor ambient temperature and the target temperature, you can determine the corresponding indoor fan speed setting based on the mapping relationship.

[0087] On the other hand, embodiments of the present invention also provide a temperature and humidity control device for an air conditioner. The temperature and humidity control device for an air conditioner described below can be referred to in correspondence with the temperature and humidity control method for an air conditioner described above.

[0088] The present invention provides a temperature and humidity control device for an air conditioner, comprising an acquisition module and a control module.

[0089] The acquisition module is used to acquire temperature and humidity control requirements.

[0090] The control module is used to switch the power supply mode of the air conditioner according to the power status of the photovoltaic power supply system of the air conditioner when the temperature and humidity regulation requirements, including dehumidification requirements, are determined. It also controls the operating frequency of the air conditioner compressor to increase from the current operating frequency. The power supply modes of the air conditioner include pure photovoltaic power supply mode and photovoltaic hybrid power supply mode. In the photovoltaic power supply mode, the photovoltaic power supply system supplies power to the air conditioner alone. In the photovoltaic hybrid power supply mode, one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

[0091] With this setup, regardless of whether the photovoltaic power supply system has sufficient power, it can ensure that photovoltaic power is used first and to the maximum extent when performing dehumidification. In other words, the air conditioner can achieve dehumidification when using photovoltaic power, which solves the problem in related technologies that air conditioners cannot dehumidify the indoor environment when using the power of the photovoltaic power supply system.

[0092] The derivation process of the beneficial effects of the temperature and humidity control device of the air conditioner in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the temperature and humidity control method of the air conditioner described above, so it will not be repeated here.

[0093] In another aspect, embodiments of the present invention also provide an air conditioner capable of executing the temperature and humidity control method of the air conditioner provided in any of the above embodiments, or including the temperature and humidity control device of the air conditioner provided in any of the above embodiments.

[0094] The derivation process of the beneficial effects of the air conditioner in the embodiments of the present invention is generally similar to the derivation process of the beneficial effects of the temperature and humidity control method or the temperature and humidity control device of the air conditioner described above, so it will not be repeated here.

[0095] 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 method for controlling temperature and humidity in an air conditioner, characterized in that, include: Obtain temperature and humidity control requirements; When the temperature and humidity regulation requirements include dehumidification requirements, the power supply mode of the air conditioner is controlled according to the power status of the photovoltaic power supply system of the air conditioner, and the operating frequency of the air conditioner compressor is increased based on the current operating frequency. The power supply mode of the air conditioner includes a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. The photovoltaic power supply mode is in which the photovoltaic power supply system supplies power to the air conditioner alone, and the photovoltaic hybrid power supply mode is in which one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

2. The temperature and humidity control method for an air conditioner according to claim 1, characterized in that, When it is determined that the temperature and humidity regulation requirement is only dehumidification, the step of controlling the power supply mode of the air conditioner according to the power status of the air conditioner's photovoltaic power supply system, and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, includes: The power supply mode of the air conditioner is kept in the pure photovoltaic power supply mode. Obtain the real-time power generation of the photovoltaic power supply system; Based on the real-time power generation, a first operating frequency is determined, wherein the first operating frequency is the maximum operating frequency of the compressor allowed by the real-time power generation. The operating frequency of the compressor is increased to the first operating frequency.

3. The temperature and humidity control method for an air conditioner according to claim 2, characterized in that, Also includes: The speed of the indoor fan of the air conditioner is reduced from the current speed.

4. The temperature and humidity control method for an air conditioner according to claim 1, characterized in that, When the temperature and humidity regulation requirement is determined to be both dehumidification and cooling, the step of controlling the power supply mode of the air conditioner according to the power status of the air conditioner's photovoltaic power supply system, and controlling the operating frequency of the air conditioner's compressor to increase based on the current operating frequency, includes: Obtain the second operating frequency, which is the maximum operating frequency of the compressor allowed by the current ambient temperature; Based on the power status of the photovoltaic power supply system and the second operating frequency, determine the feasibility of increasing the operating frequency of the compressor to the second operating frequency under the pure photovoltaic power supply mode; If the power state of the photovoltaic power supply system allows the compressor's operating frequency to increase to the second operating frequency, the power supply mode of the air conditioner is controlled to remain in the pure photovoltaic power supply mode, and the operating frequency of the compressor is controlled to increase to the second operating frequency.

5. The temperature and humidity control method for an air conditioner according to claim 4, characterized in that, The method of controlling the power supply mode of the air conditioner based on the power status of the photovoltaic power supply system of the air conditioner, and controlling the operating frequency of the air conditioner compressor to increase based on the current operating frequency, further includes: If it is determined that the power status of the photovoltaic power supply system does not allow the compressor's operating frequency to increase to the second operating frequency, the power supply mode of the air conditioner is switched to the photovoltaic hybrid power supply mode, and the operating frequency of the compressor is increased to the second operating frequency.

6. The temperature and humidity control method for an air conditioner according to claim 5, characterized in that, After the operating frequency of the compressor is increased to the second operating frequency, the method further includes: Obtain the indoor ambient temperature corresponding to the air conditioner; When the indoor ambient temperature is determined to drop below the target temperature, and the difference between the target temperature and the indoor ambient temperature is greater than or equal to a preset difference, the power supply mode of the air conditioner is switched to the pure photovoltaic power supply mode.

7. The temperature and humidity control method for an air conditioner according to claim 1, characterized in that, If the temperature and humidity regulation requirement is determined to be only cooling, the indoor fan speed of the air conditioner is increased based on the current speed, and the compressor is controlled to maintain the current operating frequency.

8. The temperature and humidity control method for an air conditioner according to claim 7, characterized in that, The method of increasing the speed of the indoor fan of the air conditioner based on the current speed includes: Obtain the indoor ambient temperature corresponding to the air conditioner; Based on the indoor ambient temperature and the target temperature, determine the difference between the indoor ambient temperature and the target temperature; The increase in the rotational speed of the indoor fan is determined based on the difference between the indoor ambient temperature and the target temperature. Based on the speed increase value, the speed of the indoor fan is controlled to increase by the speed increase value based on the current speed.

9. A temperature and humidity control device for an air conditioner, characterized in that, include: The acquisition module is used to acquire temperature and humidity control requirements; The control module is used to, when determining that the temperature and humidity regulation requirements include dehumidification requirements, switch the power supply mode of the air conditioner according to the power status of the photovoltaic power supply system of the air conditioner, and control the operating frequency of the air conditioner compressor to increase based on the current operating frequency. The power supply mode of the air conditioner includes a pure photovoltaic power supply mode and a photovoltaic hybrid power supply mode. The photovoltaic power supply mode is in which the photovoltaic power supply system supplies power to the air conditioner alone, and the photovoltaic hybrid power supply mode is in which one of the energy storage power supply system and the grid power supply system cooperates with the photovoltaic power supply system to supply power to the air conditioner.

10. An air conditioner, characterized in that, It is capable of performing the temperature and humidity control method of an air conditioner as described in any one of claims 1-8, or includes the temperature and humidity control device of an air conditioner as described in claim 9.

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