Photovoltaic air conditioner and control method and device thereof, storage medium and program product

Abstract

The invention provides a photovoltaic air conditioner and a control method and device thereof, a storage medium and a program product. The method comprises the steps that in a dehumidification mode, the frequency of a compressor, the rotating speed of an outer draught fan and the rotating speed of an inner draught fan are controlled according to the humidity difference value between the indoor environment humidity and the set humidity; in the temperature control dehumidification mode, the photovoltaic air conditioner is controlled to operate according to the photovoltaic generating capacity of the photovoltaic air conditioner and / or the battery capacity of the photovoltaic air conditioner; and under the refrigeration mode or the heating mode, according to the indoor environment temperature and the set temperature, the photovoltaic generating capacity of the photovoltaic air conditioner and / or the battery capacity of the photovoltaic air conditioner are / is combined to control the photovoltaic air conditioner to operate. According to the scheme provided by the invention, photovoltaic clean energy can be fully utilized, and energy consumption is reduced while the use comfort of a user is ensured.

Description

Technical Field

[0001] The present invention relates to the field of control, and in particular to a photovoltaic air conditioner and a control method, device, storage medium and program product thereof. Background Art

[0002] Clean energy is increasingly being developed and used. Solar energy is favored as a renewable clean energy source, and photovoltaic air conditioners have broad application prospects. Energy saving and comfort during the use of air conditioners have always been the focus of users, and temperature and humidity are important factors affecting comfort. The dehumidification process is usually accompanied by cooling, and low air outlet temperature affects comfort.

[0003] Air conditioners are designed to improve environmental indicators such as temperature, humidity, and air cleanliness. Ordinary air conditioners can generally achieve conventional functions such as temperature control, cooling and dehumidification, and heating. Some temperature control and dehumidification are controlled by solenoid valves. However, for photovoltaic air conditioners, when the number of photovoltaic panels and battery capacity are determined, the power available for air conditioners is affected by light intensity and time, that is, photovoltaic power generation is difficult to always meet the full power operation of the air conditioning system. Summary of the invention

[0004] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies and to provide a photovoltaic air conditioner and its control method, device, storage medium and program product to solve the problem in the related technologies that the photovoltaic power generation is difficult to always meet the full power operation of the air conditioning system.

[0005] On the one hand, the present invention provides a control method for a photovoltaic air conditioner, comprising: in a dehumidification mode, controlling the compressor frequency, the speed of an external fan and the speed of an internal fan according to the humidity difference between the indoor ambient humidity and a set humidity; in a temperature control dehumidification mode, controlling the operation of the photovoltaic air conditioner according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner; in a cooling mode or a heating mode, controlling the operation of the photovoltaic air conditioner according to the indoor ambient temperature and the set temperature, in combination with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

[0006] Optionally, the compressor frequency, external fan speed and internal fan speed are controlled according to the humidity difference between the indoor environment humidity and the set humidity, including: when the humidity difference is greater than or equal to a first preset humidity value, controlling the compressor to operate at a first preset frequency; when the humidity difference is greater than a second preset humidity value and less than the first preset humidity value, controlling the compressor to maintain the current frequency; when the humidity difference is less than or equal to a third preset humidity value, controlling the compressor to operate at a second preset frequency, the first preset frequency being greater than the second preset frequency; the external fan operates at an external fan speed corresponding to the compressor frequency, and the internal fan operates at a preset internal fan speed.

[0007] Optionally, in the temperature control dehumidification mode, the operation of the photovoltaic air conditioner is controlled according to the photovoltaic power generation and / or battery power of the photovoltaic air conditioner, including: when the photovoltaic power generation can meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, the compressor is controlled to operate according to the target frequency and controlled according to the set temperature, and the remaining photovoltaic power generation is used to charge the battery of the photovoltaic air conditioner; when the photovoltaic power generation cannot meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, the operation of the photovoltaic air conditioner is controlled according to the change of indoor ambient humidity and the battery power of the photovoltaic air conditioner; wherein the target frequency is determined according to the temperature difference between the indoor ambient temperature and the set temperature.

[0008] Optionally, the operation of the photovoltaic air conditioner is controlled according to the change of indoor environmental humidity and the battery power of the photovoltaic air conditioner, including: after controlling the compressor to run at a target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power of the photovoltaic air conditioner is greater than or equal to the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to operate at the target frequency; after controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to reduce the preset frequency.

[0009] Optionally, in cooling mode or heating mode, the operation of the photovoltaic air conditioner is controlled according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner, including: in cooling mode, when the temperature difference between the indoor ambient temperature and the set temperature is greater than a preset difference threshold, or in cooling mode, when the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset difference threshold, controlling the compressor to operate at a target frequency; when the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power corresponding to the target frequency of the photovoltaic air conditioner, controlling the compressor to operate at a preset frequency lower than the target frequency; after running for a preset time, if the indoor ambient temperature in cooling mode If the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is greater than or equal to the preset power, the compressor is controlled to operate at the target frequency, and the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to operate at the target frequency; after the preset running time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to control the compressor to operate at a preset frequency lower than the target frequency.

[0010] Optionally, it also includes: in heating mode, cooling mode or air supply mode, controlling the fresh air fan of the photovoltaic air conditioner according to the carbon dioxide concentration in the room, wherein: when the carbon dioxide concentration is less than or equal to a first preset concentration threshold, controlling the air valve of the fresh air fan to open, and the fresh air fan runs at a first preset speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than the second preset concentration threshold, controlling the air valve of the fresh air fan to open, and the fresh air fan runs at a second preset speed; when the carbon dioxide concentration is greater than or equal to the second preset concentration threshold, controlling the air valve of the fresh air fan to open, and the fresh air fan runs at a third preset speed; the first preset speed is less than the second preset speed; the second preset speed is less than the third preset speed.

[0011] On the other hand, the present invention provides a control device for a photovoltaic air conditioner, including: a dehumidification control unit, which is used to control the compressor frequency, the speed of the external fan and the speed of the internal fan according to the humidity difference between the indoor ambient humidity and the set humidity in the dehumidification mode; a temperature control dehumidification unit, which is used to control the operation of the photovoltaic air conditioner according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner in the temperature control dehumidification mode; a heat exchange control unit, which is used to control the operation of the photovoltaic air conditioner in the cooling mode or the heating mode according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

[0012] Optionally, the dehumidification control unit controls the compressor frequency, external fan speed and internal fan speed according to the humidity difference between the indoor environment humidity and the set humidity, including: when the humidity difference is greater than or equal to a first preset humidity value, controlling the compressor to operate at a first preset frequency; when the humidity difference is greater than a second preset humidity value and less than the first preset humidity value, controlling the compressor to maintain the current frequency; when the humidity difference is less than or equal to a third preset humidity value, controlling the compressor to operate at a second preset frequency, the first preset frequency being greater than the second preset frequency; the external fan operates at the external fan speed corresponding to the compressor frequency, and the internal fan operates at the preset internal fan speed.

[0013] Optionally, the temperature control and dehumidification unit, in the temperature control and dehumidification mode, controls the operation of the photovoltaic air conditioner according to the photovoltaic power generation and / or battery power of the photovoltaic air conditioner, including: when the photovoltaic power generation can meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, controlling the compressor to operate according to the target frequency and controlling it according to the set temperature, and the remaining photovoltaic power generation is used to charge the battery of the photovoltaic air conditioner; when the photovoltaic power generation cannot meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, controlling the operation of the photovoltaic air conditioner according to the change of indoor environmental humidity and the battery power of the photovoltaic air conditioner; wherein the target frequency is determined according to the temperature difference between the indoor ambient temperature and the set temperature.

[0014] Optionally, the temperature control and dehumidification unit controls the operation of the photovoltaic air conditioner according to the change of indoor environmental humidity and the battery power of the photovoltaic air conditioner, including: after controlling the compressor to operate at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power of the photovoltaic air conditioner is greater than or equal to the preset power, then the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to operate at the target frequency; after controlling the compressor to operate at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power is less than the preset power, then the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to operate at a lower preset frequency.

[0015] Optionally, the heat exchange control unit controls the operation of the photovoltaic air conditioner in the cooling mode or the heating mode according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner, including: in the cooling mode, when the temperature difference between the indoor ambient temperature and the set temperature is greater than a preset difference threshold, or in the cooling mode, when the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset difference threshold, controlling the compressor to operate at a target frequency; when the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power corresponding to the target frequency of the photovoltaic air conditioner, controlling the compressor to operate at a preset frequency lower than the target frequency; after running for a preset time, if in the cooling mode If the reduction value of the indoor ambient temperature does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is greater than or equal to the preset power, the compressor is controlled to operate at the target frequency, and the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to operate at the target frequency; after running for a preset time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to control the compressor to operate at a preset frequency lower than the target frequency.

[0016] Optionally, it also includes: a fresh air control unit, which is used to control the fresh air fan of the photovoltaic air conditioner according to the carbon dioxide concentration in the room in the heating mode, cooling mode or air supply mode, wherein: when the carbon dioxide concentration is less than or equal to a first preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a first preset speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a second preset speed; when the carbon dioxide concentration is greater than or equal to the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a third preset speed; the first preset speed is less than the second preset speed; the second preset speed is less than the third preset speed.

[0017] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0018] In another aspect, the present invention provides a photovoltaic air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the program.

[0019] In another aspect, the present invention provides a photovoltaic air conditioner, comprising any of the control devices described above.

[0020] In yet another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0021] According to the technical solution of the present invention, precise control of the use environment is achieved by detecting the photovoltaic (storage) power generation or remaining power and performing corresponding control in combination with environmental parameters.

[0022] According to the technical solution of the present invention, independent control of temperature and humidity can be achieved. Temperature and humidity can be quickly controlled according to usage requirements. Stable operation can also be achieved through photovoltaic power when the load is small, thereby improving environmental quality while reducing carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 is a method schematic diagram of an embodiment of a control method for a photovoltaic air conditioner provided by the present invention;

[0025] Figure 2A schematic structural diagram of a photovoltaic air conditioner according to a specific embodiment of the present invention is shown;

[0026] Figure 3 is a method schematic diagram of another embodiment of the photovoltaic air conditioner control method provided by the present invention;

[0027] Figure 4 is a method schematic diagram of a specific embodiment of the photovoltaic air conditioner control method provided by the present invention;

[0028] Figure 5 It is a structural block diagram of an embodiment of a control device for a photovoltaic air conditioner provided by the present invention;

[0029] Figure 6 It is a structural block diagram of another embodiment of the control device of the photovoltaic air conditioner provided by the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] The present invention provides a control method and a control device for a photovoltaic air conditioner. The photovoltaic air conditioner can operate in a dehumidification mode, a temperature control dehumidification mode, a cooling mode, and a heating mode. The photovoltaic air conditioner is powered by photovoltaic power generation, and the photovoltaic power supply has a higher priority than a battery, and the battery is charged by photovoltaic power generation.

[0033] In a specific implementation, the photovoltaic air conditioner has a double four-way valve, a double flow control device and a double-cylinder compressor. Figure 2 FIG. 1 shows a schematic diagram of the structure of a photovoltaic air conditioner according to a specific embodiment of the present invention. Figure 2 As shown, the air conditioning system comprises: a compressor 1; a first four-way valve 2, a second four-way valve 3, a first heat exchanger 4, a first cooling fan 5, a first flow control device 6, a second flow control device 7, a second cooling fan 8, a second heat exchanger 9, a third heat exchanger 10, a separator 11, and a one-way valve 12. The compressor 1 is a two-cylinder compressor.

[0034] Outdoor unit part: The exhaust pipe of compressor 1 is connected to the first four-way valve 2 and the second four-way valve 3 through a flow divider, and then connected to the first heat exchanger 4 through a pipeline. The other end of the heat exchanger 1 (after being diverted by a one-to-two flow divider) is divided into two paths, one of which is provided with a first flow control device 6, and then enters the pipeline connection valve and the corresponding pipeline to enter the third heat exchanger 10 of the indoor unit. Before the first flow control device 6, there is a branch connected to the value separator 11, and a one-way valve 12 is provided on the road; the other path is provided with a second flow control device 7, and then enters the pipeline connection valve and the corresponding pipeline to enter the second heat exchanger 9 of the indoor unit. There are 4 valves for outdoor unit connection (2 in and 2 out). The separator and the one-way valve are both located in the outdoor unit. The first heat exchanger is an outdoor heat exchanger, and the second and third heat exchangers are indoor heat exchangers.

[0035] Inner unit part: The second heat exchanger 9 and the third heat exchanger 10 are connected in parallel and arranged front and back, and connected to the outer unit through connecting pipes (2 in and 2 out).

[0036] The separator 11 is connected to the second heat exchanger 9, the compressor suction pipe and the bypass flow path where the one-way valve 12 is located through the refrigerant pipeline to prevent the suction from carrying liquid and causing liquid hammer in the compressor. The other end of the bypass flow path where the one-way valve 12 is located is connected to the branch where the first flow control device 6 is located to prevent the refrigerant from backflowing and causing the inability to perform step-by-step heat exchange. The double four-way valves operate synchronously, and the temperature and humidity control is mainly completed through the double flow control device. For example, when temperature control and dehumidification are performed, the first flow control device 6 is adjusted down, and the high-humidity air exchanges heat with the refrigerant after throttling and depressurization to achieve air cooling and dehumidification; the second flow control device 7 is adjusted up, and the higher temperature refrigerant is used to reheat the air after cooling and dehumidification, thereby achieving temperature control and dehumidification.

[0037] Figure 1 It is a method schematic diagram of an embodiment of the control method of the photovoltaic air conditioner provided by the present invention.

[0038] like Figure 1 As shown, according to one embodiment of the present invention, the control method at least includes step S110, step S120 and step S130.

[0039] Step S110, in the dehumidification mode, the compressor frequency, the external fan speed and the internal fan speed are controlled according to the humidity difference between the indoor environment humidity and the set humidity.

[0040] In a specific embodiment, when the humidity difference is greater than or equal to a first preset humidity value, the compressor is controlled to operate at a first preset frequency; when the humidity difference is greater than a second preset humidity value and less than the first preset humidity value, the compressor is controlled to maintain operation at the current frequency; when the humidity difference is less than or equal to a third preset humidity value, the compressor is controlled to operate at a second preset frequency, and the first preset frequency is greater than the second preset frequency; the external fan operates at an external fan speed corresponding to the compressor frequency, and the internal fan operates at a preset internal fan speed.

[0041] Specifically, in dehumidification mode, the air conditioner is turned on and running by setting the humidity, and the compressor frequency, outdoor unit wind speed and indoor fan speed are controlled according to the difference △RH between the indoor environment humidity detected by the sensor and the set humidity. When △RH≥40%, the compressor runs at high frequency; when 10%<△RH<40%, the compressor maintains the current frequency; when △RH≤10%, the compressor runs at low frequency, the outdoor fan speed corresponding to the compressor frequency setting, and the indoor fan runs at the preset indoor fan speed.

[0042] In the typical southern rainy season, the dry-bulb temperature is not high but the relative humidity is very high. It is difficult for the water on the human body surface to evaporate, giving people a stuffy feeling. For example, when the dry-bulb temperature is detected at 27°C, the relative humidity should be controlled at around 47% to avoid control deviation caused by relative humidity control alone.

[0043] Step S120, in the temperature control and dehumidification mode, controlling the operation of the photovoltaic air conditioner according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

[0044] Specifically, for Figure 2 In the photovoltaic air conditioner shown, in the temperature control and dehumidification mode, the inlet and outlet refrigerant states of the second heat exchanger 9 and the third heat exchanger 10 are controlled by controlling the first flow control device 6 and the second flow control device 7. The third heat exchanger 10 is on the low temperature side to achieve cooling and dehumidification, and the second heat exchanger 9 is on the high temperature side to achieve reheating of the air after cooling and dehumidification, thereby achieving temperature control and dehumidification.

[0045] The pressure drop of the first flow control device 6 is large, and the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the second heat exchanger, which absorbs heat and evaporates to enter the compressor; the pressure drop of the flow control device 7 is small, and the medium-temperature (higher than the indoor ambient temperature) medium-pressure gas-liquid two-phase refrigerant or high-temperature supercooled refrigerant enters the third heat exchanger to reheat the air after the second heat exchanger. In this operating mode, the first flow control device 6 and the second flow control device 7 are both medium-temperature and high-pressure supercooled liquid refrigerants. By changing the flow cross-sectional area of ​​the first flow control device 6 and the second flow control device 7, the refrigerant flow and pressure drop are controlled, and then the state of the refrigerant entering the second heat exchanger 9 and the third heat exchanger 10 is controlled.

[0046] In a specific implementation, in the temperature control and dehumidification mode, the operation of the photovoltaic air conditioner is controlled according to the photovoltaic power generation and / or battery power of the photovoltaic air conditioner, including the following situations:

[0047] (1) When the photovoltaic power generation can meet the power required by the photovoltaic air conditioner to operate at a target frequency, the compressor is controlled to operate at the target frequency and the temperature is controlled according to the set temperature, and the remaining photovoltaic power generation is used to charge the battery of the photovoltaic air conditioner.

[0048] The target frequency can be determined according to the temperature difference between the indoor ambient temperature and the set temperature. For example, the target frequency can be determined according to the correspondence between different temperature differences between the indoor ambient temperature and the set temperature and different target frequencies, and the corresponding target speed of the outdoor fan can also be determined according to the target frequency.

[0049] When the photovoltaic power generation is higher than the power consumption of the air-conditioning unit, that is, it can meet the power consumption of the photovoltaic air-conditioning according to the target frequency, the compressor of the photovoltaic air-conditioning is controlled to operate at the target frequency, and the temperature is also controlled according to the set temperature. The remaining photovoltaic power generation is used to charge the battery.

[0050] (2) When the photovoltaic power generation cannot meet the power required by the photovoltaic air conditioner to operate at a power level corresponding to the target frequency, the operation of the photovoltaic air conditioner is controlled according to changes in indoor ambient humidity and the battery power of the photovoltaic air conditioner.

[0051] Specifically, after controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power of the photovoltaic air conditioner is greater than or equal to the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to run at the target frequency.

[0052] After controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to reduce the preset frequency.

[0053] For example, the preset power is 50% of the full power of the battery. When the photovoltaic power generation cannot meet the full power operation of the unit, humidity control is given priority (the compressor frequency is adjusted according to the humidity difference between the indoor environment humidity and the set humidity). When the moisture content does not decrease significantly after running for a certain period of time and the battery power is ≥50%, the battery and photovoltaic power are used together to meet the full power operation of the unit, that is, the photovoltaic air conditioner is operated at full power according to the power corresponding to the target frequency; when the moisture content does not decrease significantly after running for a certain period of time but the battery power is <50%, the battery and photovoltaic power are used together to reduce the frequency band of the air conditioner compressor.

[0054] Step S130, in cooling mode or heating mode, controlling the operation of the photovoltaic air conditioner according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

[0055] In a specific embodiment, in cooling mode, when the temperature difference between the indoor ambient temperature and the set temperature is greater than a preset difference threshold, or in cooling mode, when the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset difference threshold, the compressor is controlled to operate at a target frequency; when the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, the compressor is controlled to operate at a preset frequency lower than the target frequency; after running for a preset time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is greater than or equal to the preset power, the compressor is controlled to operate at the target frequency, and the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power operation of the photovoltaic air conditioner corresponding to the target frequency; after running for a preset time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to operate at a preset frequency lower than the target frequency.

[0056] The target frequency can be determined according to the temperature difference between the indoor ambient temperature and the set temperature. For example, the target frequency can be determined according to the correspondence between different temperature differences between the indoor ambient temperature and the set temperature and different target frequencies, and the corresponding target speed of the outdoor fan can also be determined according to the target frequency.

[0057] Specifically, for Figure 2 In the photovoltaic air conditioner shown, in the cooling mode, the first flow control device 6 and the second flow control device 7 realize throttling and pressure reduction, and the superheat of the second heat exchanger 9 and the third heat exchanger 10 is used as the control target to realize the evaporator step heat exchange and improve the refrigeration energy efficiency.

[0058] For example, the preset power is 50% of the full power of the battery. When the difference between the detected indoor ambient temperature and the set temperature is large (greater than the preset difference threshold), the air-conditioning system runs at full power. If the photovoltaic power generation power does not meet the power corresponding to the compressor target frequency, the compressor will reduce the preset frequency to run, such as reducing one frequency band. When the temperature does not drop significantly after running for a certain period of time (the reduction value of the indoor ambient temperature does not reach the preset temperature reduction value) and the battery power is ≥ 50% of the full battery power, the battery and photovoltaic power are used together to supply power to meet the full power operation of the unit; when the temperature does not drop significantly after running for a certain period of time but the battery power is < 50% of the full battery power, the battery and photovoltaic power are used together to supply power, and the air-conditioning compressor reduces one frequency band to run.

[0059] for Figure 2 In the photovoltaic air conditioner shown, in the heating mode, the first flow control device 6 and the second flow control device 7 implement throttling and pressure reduction, and take the superheat of the first heat exchanger 4 as the control target to achieve heating control.

[0060] When the difference between the set temperature and the indoor ambient temperature is large (greater than the preset difference threshold), the air-conditioning system runs at full power. If the photovoltaic power generation power does not meet the power corresponding to the compressor target frequency, the compressor will reduce the preset frequency, such as reducing one frequency band. When the temperature does not increase significantly after running for a certain period of time (the increase in the indoor ambient temperature in the heating mode does not reach the preset temperature increase value), the battery and photovoltaic power are used together to supply power to meet the full power operation of the unit.

[0061] Figure 3 It is a method schematic diagram of another embodiment of the photovoltaic air conditioner control method provided by the present invention.

[0062] like Figure 3 As shown, according to one embodiment of the present invention, the control method further includes step S140.

[0063] Step S140, in the heating mode, the cooling mode or the air supply mode, the fresh air fan of the photovoltaic air conditioner is controlled according to the carbon dioxide concentration in the room.

[0064] In a specific embodiment, when the carbon dioxide concentration is less than or equal to a first preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a first preset speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a second preset speed; when the carbon dioxide concentration is greater than or equal to the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a third preset speed; the first preset speed is less than the second preset speed; the second preset speed is less than the third preset speed.

[0065] Specifically, the ventilation function can be set in cooling, heating or air supply mode. According to the comparison between the detected carbon dioxide concentration and the system preset value, when the concentration c≤1000ppm, the air valve is opened and the fresh air fan runs at a low speed (first preset speed); when 1000<c<1500ppm, the fresh air fan runs at a medium speed (second preset speed); when c≥1500ppm, the fresh air fan runs at a high speed (third preset speed). Figure 2 In the photovoltaic air conditioner in the illustrated embodiment, the introduced fresh air passes through the second heat exchanger 9 and the third heat exchanger 10, which can improve the indoor environmental quality while avoiding large fluctuations in temperature and humidity that affect comfort.

[0066] In order to clearly illustrate the technical solution of the present invention, the execution process of the control method of the photovoltaic air conditioner provided by the present invention is described below with a specific embodiment.

[0067] Figure 4 Schematic diagram of a specific embodiment of the photovoltaic air conditioner control method provided by the present invention. Figure 4 As shown in the figure, in the dehumidification mode, the air conditioning system is turned on and operated by setting the humidity, and the compressor frequency, the outdoor unit wind speed and the indoor fan speed are controlled according to the difference △RH between the indoor ambient humidity detected by the sensor and the set humidity. When △RH≥40%, the compressor runs at high frequency; when 10%<△RH<40%, the compressor maintains the current frequency; when △RH≤10%, the compressor runs at low frequency, the outdoor fan speed corresponding to the compressor frequency setting, and the indoor fan runs according to the preset indoor fan speed. The electronic expansion valve is controlled according to the temperature difference Δt2 between the detected indoor ambient temperature and the set temperature.

[0068] In cooling mode, the compressor frequency and the external fan speed are controlled according to the temperature difference Δt1 between the detected indoor ambient temperature and the set temperature, wherein the target frequency of the compressor is determined according to the temperature difference Δt1 between the indoor ambient temperature and the set temperature, the target speed of the external fan is determined according to the target frequency, the compressor is controlled according to the compressor target frequency, and the external fan is controlled according to the external fan target speed.

[0069] In the heating mode, the compressor frequency and the outdoor fan speed are controlled according to the temperature difference Δt2 between the detected set temperature and the indoor ambient temperature, wherein the target frequency of the compressor is determined according to the temperature difference Δt1 between the indoor ambient temperature and the set temperature, and the target speed of the outdoor fan is determined according to the target frequency, the compressor is controlled according to the compressor target frequency, and the outdoor fan is controlled according to the outdoor fan target speed.

[0070] The ventilation function can be set in cooling, heating or air supply mode. According to the comparison between the detected carbon dioxide concentration and the system preset value, when the concentration c≤1000ppm, the air valve opens and the fresh air fan runs at low speed; when 1000<c<1500ppm, the fresh air fan runs at medium speed; when c≥1500ppm, the fresh air fan runs at high speed. After the ventilation is completed, the ventilation function is turned off, and the air valve and fan are turned off.

[0071] Figure 5 1 is a structural block diagram of an embodiment of the photovoltaic air conditioner control device provided by the present invention. Figure 5 As shown, the control device 100 of the photovoltaic air conditioner includes: a dehumidification control unit 110, a temperature control dehumidification unit 120 and a heat exchange control unit 130.

[0072] The dehumidification control unit 110 is used to control the compressor frequency, the external fan speed and the internal fan speed according to the humidity difference between the indoor environment humidity and the set humidity in the dehumidification mode.

[0073] In a specific embodiment, when the humidity difference is greater than or equal to a first preset humidity value, the compressor is controlled to operate at a first preset frequency; when the humidity difference is greater than a second preset humidity value and less than the first preset humidity value, the compressor is controlled to maintain operation at the current frequency; when the humidity difference is less than or equal to a third preset humidity value, the compressor is controlled to operate at a second preset frequency, and the first preset frequency is greater than the second preset frequency; the external fan operates at an external fan speed corresponding to the compressor frequency, and the internal fan operates at a preset internal fan speed.

[0074] Specifically, in dehumidification mode, the air conditioner is turned on and running by setting the humidity, and the compressor frequency, outdoor unit wind speed and indoor fan speed are controlled according to the difference △RH between the indoor environment humidity detected by the sensor and the set humidity. When △RH≥40%, the compressor runs at high frequency; when 10%<△RH<40%, the compressor maintains the current frequency; when △RH≤10%, the compressor runs at low frequency, the outdoor fan speed corresponding to the compressor frequency setting, and the indoor fan runs at the preset indoor fan speed.

[0075] The temperature control and dehumidification unit 120 is used to control the operation of the photovoltaic air conditioner according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner in the temperature control and dehumidification mode.

[0076] Specifically, for Figure 2In the photovoltaic air conditioner shown, in the temperature control and dehumidification mode, the inlet and outlet refrigerant states of the second heat exchanger 9 and the third heat exchanger 10 are controlled by controlling the first flow control device 6 and the second flow control device 7. The third heat exchanger 10 is on the low temperature side to achieve cooling and dehumidification, and the second heat exchanger 9 is on the high temperature side to achieve reheating of the air after cooling and dehumidification, thereby achieving temperature control and dehumidification.

[0077] The pressure drop of the first flow control device 6 is large, and the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the second heat exchanger, which absorbs heat and evaporates to enter the compressor; the pressure drop of the flow control device 7 is small, and the medium-temperature (higher than the indoor ambient temperature) medium-pressure gas-liquid two-phase refrigerant or high-temperature supercooled refrigerant enters the third heat exchanger to reheat the air after the second heat exchanger. In this operating mode, the first flow control device 6 and the second flow control device 7 are both medium-temperature and high-pressure supercooled liquid refrigerants. By changing the flow cross-sectional area of ​​the first flow control device 6 and the second flow control device 7, the refrigerant flow and pressure drop are controlled, and then the state of the refrigerant entering the second heat exchanger 9 and the third heat exchanger 10 is controlled.

[0078] In a specific implementation, the temperature control and dehumidification unit 120 controls the operation of the photovoltaic air conditioner according to the photovoltaic power generation and / or battery power of the photovoltaic air conditioner in the temperature control and dehumidification mode, including the following situations:

[0079] (1) When the photovoltaic power generation can meet the power required by the photovoltaic air conditioner to operate at a target frequency, the compressor is controlled to operate at the target frequency and the temperature is controlled according to the set temperature, and the remaining photovoltaic power generation is used to charge the battery of the photovoltaic air conditioner.

[0080] The target frequency can be determined according to the temperature difference between the indoor ambient temperature and the set temperature. For example, the target frequency can be determined according to the correspondence between different temperature differences between the indoor ambient temperature and the set temperature and different target frequencies, and the corresponding target speed of the outdoor fan can also be determined according to the target frequency.

[0081] When the photovoltaic power generation is higher than the power consumption of the air-conditioning unit, that is, it can meet the power consumption of the photovoltaic air-conditioning according to the target frequency, the compressor of the photovoltaic air-conditioning is controlled to operate at the target frequency, and the temperature is also controlled according to the set temperature. The remaining photovoltaic power generation is used to charge the battery.

[0082] (2) When the photovoltaic power generation cannot meet the power required by the photovoltaic air conditioner to operate at a power level corresponding to the target frequency, the operation of the photovoltaic air conditioner is controlled according to changes in indoor ambient humidity and the battery power of the photovoltaic air conditioner.

[0083] Specifically, after controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power of the photovoltaic air conditioner is greater than or equal to the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power requirement of the photovoltaic air conditioner to run at the target frequency.

[0084] After controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to reduce the preset frequency.

[0085] For example, the preset power is 50% of the full power of the battery. When the photovoltaic power generation cannot meet the full power operation of the unit, humidity control is given priority (the compressor frequency is adjusted according to the humidity difference between the indoor environment humidity and the set humidity). When the moisture content does not decrease significantly after running for a certain period of time and the battery power is ≥50%, the battery and photovoltaic power are used together to meet the full power operation of the unit, that is, the photovoltaic air conditioner is operated at full power according to the power corresponding to the target frequency; when the moisture content does not decrease significantly after running for a certain period of time but the battery power is <50%, the battery and photovoltaic power are used together to reduce the frequency band of the air conditioner compressor.

[0086] The heat exchange control unit 130 is used to control the operation of the photovoltaic air conditioner in cooling mode or heating mode according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

[0087] In a specific embodiment, in cooling mode, when the temperature difference between the indoor ambient temperature and the set temperature is greater than a preset difference threshold, or in cooling mode, when the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset difference threshold, the compressor is controlled to operate at a target frequency; when the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power operation of the photovoltaic air conditioner corresponding to the target frequency, the compressor is controlled to operate at a preset frequency lower than the target frequency; after running for a preset time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is greater than or equal to the preset power, the compressor is controlled to operate at the target frequency, and the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power operation of the photovoltaic air conditioner corresponding to the target frequency; after running for a preset time, if the reduction value of the indoor ambient temperature in the cooling mode does not reach the preset temperature reduction value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to operate at a preset frequency lower than the target frequency.

[0088] The target frequency can be determined according to the temperature difference between the indoor ambient temperature and the set temperature. For example, the target frequency can be determined according to the correspondence between different temperature differences between the indoor ambient temperature and the set temperature and different target frequencies, and the corresponding target speed of the outdoor fan can also be determined according to the target frequency.

[0089] Specifically, for Figure 2 In the photovoltaic air conditioner shown, in the cooling mode, the first flow control device 6 and the second flow control device 7 realize throttling and pressure reduction, and the superheat of the second heat exchanger 9 and the third heat exchanger 10 is used as the control target to realize the evaporator step heat exchange and improve the refrigeration energy efficiency.

[0090] For example, the preset power is 50% of the full power of the battery. When the difference between the detected indoor ambient temperature and the set temperature is large (greater than the preset difference threshold), the air-conditioning system runs at full power. If the photovoltaic power generation power does not meet the power corresponding to the compressor target frequency, the compressor will reduce the preset frequency to run, such as reducing one frequency band. When the temperature does not drop significantly after running for a certain period of time (the reduction value of the indoor ambient temperature does not reach the preset temperature reduction value) and the battery power is ≥ 50% of the full battery power, the battery and photovoltaic power are used together to supply power to meet the full power operation of the unit; when the temperature does not drop significantly after running for a certain period of time but the battery power is < 50% of the full battery power, the battery and photovoltaic power are used together to supply power, and the air-conditioning compressor reduces one frequency band to run.

[0091] for Figure 2In the photovoltaic air conditioner shown, in the heating mode, the first flow control device 6 and the second flow control device 7 implement throttling and pressure reduction, and take the superheat of the first heat exchanger 4 as the control target to achieve heating control.

[0092] When the difference between the set temperature and the indoor ambient temperature is large (greater than the preset difference threshold), the air-conditioning system runs at full power. If the photovoltaic power generation power does not meet the power corresponding to the compressor target frequency, the compressor will reduce the preset frequency, such as reducing one frequency band. When the temperature does not increase significantly after running for a certain period of time (the increase in the indoor ambient temperature in the heating mode does not reach the preset temperature increase value), the battery and photovoltaic power are used together to supply power to meet the full power operation of the unit.

[0093] Figure 6 FIG. 1 is a structural block diagram of another embodiment of the photovoltaic air conditioner control device provided by the present invention. Figure 6 As shown, the photovoltaic air conditioner control device 100 also includes: a fresh air control unit 140.

[0094] The fresh air control unit 140 is used to control the fresh air fan of the photovoltaic air conditioner according to the carbon dioxide concentration in the room in the heating mode, cooling mode or air supply mode.

[0095] In a specific embodiment, when the carbon dioxide concentration is less than or equal to a first preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a first preset speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a second preset speed; when the carbon dioxide concentration is greater than or equal to the second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a third preset speed; the first preset speed is less than the second preset speed; the second preset speed is less than the third preset speed.

[0096] Specifically, the ventilation function can be set in cooling, heating or air supply mode. According to the comparison between the detected carbon dioxide concentration and the system preset value, when the concentration c≤1000ppm, the air valve is opened and the fresh air fan runs at a low speed (first preset speed); when 1000<c<1500ppm, the fresh air fan runs at a medium speed (second preset speed); when c≥1500ppm, the fresh air fan runs at a high speed (third preset speed). Figure 2 In the photovoltaic air conditioner in the illustrated embodiment, the introduced fresh air passes through the second heat exchanger 9 and the third heat exchanger 10, which can improve the indoor environmental quality while avoiding large fluctuations in temperature and humidity that affect comfort.

[0097] The present invention also provides a storage medium corresponding to the control method of the photovoltaic air conditioner, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0098] The present invention also provides a photovoltaic air conditioner corresponding to the control method of the photovoltaic air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the computer program.

[0099] The present invention also provides a photovoltaic air conditioner corresponding to the control device of the photovoltaic air conditioner, including any of the control devices of the photovoltaic air conditioner described above.

[0100] The present invention also provides a computer program product corresponding to the control method of the photovoltaic air conditioner, including a computer program, and when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0101] Based on this, the solution provided by the present invention can detect the power generation or remaining power of photovoltaic (storage) and the air conditioning system can perform corresponding control to achieve precise control of the use environment. Photovoltaic (storage) clean energy can be fully utilized to ensure user comfort while saving energy consumption. According to the temperature and humidity settings and the comparison of detection data, the problem of uncontrollable temperature during dehumidification can be avoided.

[0102] The solution provided by the present invention is that when temperature is controlled, the photovoltaic air-conditioning system starts and runs according to the temperature setting; when temperature control + humidity control is performed, temperature control or humidity control is prioritized according to the setting, and the fresh air valve and fan are turned on when fresh air is set to be introduced.

[0103] The solution provided by the present invention combines the low energy consumption characteristics of photovoltaic air conditioners to control several important parameters that affect air quality, thereby improving user comfort. Combined with the air conditioner operation mode, step heat exchange and temperature control dehumidification are achieved through control between different electronic expansion valves.

[0104] According to the technical solution of the present invention, photovoltaic (storage) clean energy is fully utilized to ensure user comfort while saving energy consumption. According to the temperature and humidity settings and the comparison of detection data, the problem of uncontrollable temperature during dehumidification is avoided.

[0105] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0108] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it 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 relevant technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0109] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A control method for a photovoltaic air conditioner, characterized in that: include: In dehumidification mode, the compressor frequency, external fan speed and internal fan speed are controlled according to the humidity difference between the indoor ambient humidity and the set humidity; In the temperature control and dehumidification mode, the operation of the photovoltaic air conditioner is controlled according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner; In cooling mode or heating mode, the operation of the photovoltaic air conditioner is controlled according to the indoor ambient temperature and the set temperature in combination with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

2. The method according to claim 1, characterized in that The compressor frequency, external fan speed and internal fan speed are controlled according to the humidity difference between the indoor ambient humidity and the set humidity, including: When the humidity difference is greater than or equal to a first preset humidity value, controlling the compressor to operate at a first preset frequency; When the humidity difference is greater than the second preset humidity value and less than the first preset humidity value, controlling the compressor to maintain the current frequency operation; When the humidity difference is less than or equal to a third preset humidity value, controlling the compressor to operate at a second preset frequency, wherein the first preset frequency is greater than the second preset frequency; The external fan runs at an external fan speed corresponding to the compressor frequency, and the internal fan runs at a preset internal fan speed.

3. The method according to claim 1, characterized in that In the temperature control and dehumidification mode, the operation of the photovoltaic air conditioner is controlled according to the photovoltaic power generation and / or battery power of the photovoltaic air conditioner, including: When the photovoltaic power generation can meet the power required by the photovoltaic air conditioner to operate at the target frequency, the compressor is controlled to operate at the target frequency and the temperature is controlled according to the set temperature, and the remaining photovoltaic power generation is used to charge the battery of the photovoltaic air conditioner; When the photovoltaic power generation cannot meet the power operation of the photovoltaic air conditioner according to the target frequency, the operation of the photovoltaic air conditioner is controlled according to the change of indoor environmental humidity and the battery power of the photovoltaic air conditioner; The target frequency is determined according to the temperature difference between the indoor ambient temperature and the set temperature.

4. The method according to claim 3, characterized in that According to the change of indoor environmental humidity and the battery power of the photovoltaic air conditioner, the operation of the photovoltaic air conditioner is controlled, including: After the compressor is controlled to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power of the photovoltaic air conditioner is greater than or equal to the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power operation of the photovoltaic air conditioner at the target frequency; After controlling the compressor to run at the target frequency for a preset time, if the reduction value of the indoor environmental humidity does not reach the preset humidity reduction value and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to reduce the preset frequency.

5. The method according to any one of claims 1 to 4, characterized in that: In cooling mode or heating mode, the operation of the photovoltaic air conditioner is controlled according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner, including: In cooling mode, when the temperature difference between the indoor ambient temperature and the set temperature is greater than a preset difference threshold, or in cooling mode, when the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset difference threshold, controlling the compressor to operate at a target frequency; When the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power operation of the photovoltaic air conditioner according to the target frequency, the compressor is controlled to reduce the preset frequency according to the target frequency; After the preset running time, if the decrease value of the indoor ambient temperature in the cooling mode does not reach the preset temperature decrease value or the increase value of the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is greater than or equal to the preset power, the compressor is controlled to operate at the target frequency, and the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power operation of the photovoltaic air conditioner according to the target frequency; After running for a preset time, if the decrease in the indoor ambient temperature in the cooling mode does not reach the preset temperature decrease value or the increase in the indoor ambient temperature in the heating mode does not reach the preset temperature increase value, and the battery power is less than the preset power, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to operate at a preset frequency lower than the target frequency.

6. The method according to any one of claims 1 to 4, characterized in that: Also includes: In heating mode, cooling mode or air supply mode, the fresh air fan of the photovoltaic air conditioner is controlled according to the carbon dioxide concentration in the room, wherein: When the carbon dioxide concentration is less than or equal to a first preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a first preset speed; When the carbon dioxide concentration is greater than a first preset concentration threshold and less than a second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a second preset speed; When the carbon dioxide concentration is greater than or equal to a second preset concentration threshold, the air valve of the fresh air fan is controlled to open, and the fresh air fan runs at a third preset speed; The first preset speed is less than the second preset speed; the second preset speed is less than the third preset speed.

7. A control device for a photovoltaic air conditioner, characterized in that: include: A dehumidification control unit is used to control the compressor frequency, the external fan speed and the internal fan speed according to the humidity difference between the indoor ambient humidity and the set humidity in the dehumidification mode; A temperature control and dehumidification unit, used to control the operation of the photovoltaic air conditioner according to the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner in the temperature control and dehumidification mode; A heat exchange control unit is used to control the operation of the photovoltaic air conditioner in cooling mode or heating mode according to the indoor ambient temperature and the set temperature, combined with the photovoltaic power generation of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner.

8. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of any method described in claims 1-6 are implemented.

9. A photovoltaic air conditioner, characterized in that: It comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method according to any one of claims 1 to 6 are implemented, and the control device according to claim 7 is included.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of any one of the methods of claims 1 to 6 when executed by a processor.

Images