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

Abstract

The application provides a photovoltaic air conditioner and a control method, device, storage medium and program product thereof. The method comprises the following steps: in a dehumidification mode, controlling the frequency of a compressor, the rotating speed of an outer fan and the rotating speed of an inner fan according to a humidity difference between an indoor environment humidity and a set humidity; in a temperature control and dehumidification mode, controlling the operation of the photovoltaic air conditioner according to a photovoltaic power generation amount of the photovoltaic air conditioner and / or a battery power amount of the photovoltaic air conditioner; in a refrigeration mode or a heating mode, controlling the operation of the photovoltaic air conditioner according to an indoor environment temperature and a set temperature, in combination with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner. The scheme provided by the application can make full use of photovoltaic clean energy, ensure the use comfort of users and save energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of control, and particularly to a photovoltaic air conditioner, a control method and device thereof, a storage medium and a program product. BACKGROUND

[0002] Clean energy is increasingly developed and used, and solar energy, as a renewable clean energy, is favored, and photovoltaic air conditioners have broad application prospects. Energy saving and comfort during 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 outlet air temperature affects comfort.

[0003] Air conditioners aim to improve environmental indicators such as temperature, humidity and air cleanliness, and ordinary air conditioners can generally realize conventional functions such as temperature control, cooling and dehumidification, heating and the like, and some can be controlled through electromagnetic valves. However, for photovoltaic air conditioners, under the condition that the number of photovoltaic panels and the capacity of the battery are determined, the available power of the air conditioner is affected by the intensity of light and time, that is, the photovoltaic power generation capacity is difficult to always meet the full power operation of the air conditioning system. SUMMARY

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

[0005] In one aspect, the present application provides a control method of a photovoltaic air conditioner, comprising: in a dehumidification mode, controlling the frequency of a compressor, the speed of an outdoor fan and the speed of an indoor fan according to the humidity difference between the indoor environment humidity and the set humidity; in a temperature and dehumidification control mode, controlling the operation of the photovoltaic air conditioner according to the photovoltaic power generation capacity of the photovoltaic air conditioner and / or the battery capacity 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 environment temperature and the set temperature, in combination with the photovoltaic power generation capacity of the photovoltaic air conditioner and / or the battery capacity of the photovoltaic air conditioner.

[0006] Optionally, controlling the frequency of the compressor, the speed of the outdoor fan and the speed of the indoor fan according to the humidity difference between the indoor environment humidity and the set humidity comprises: 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; and 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 outdoor fan operates at an outdoor fan speed corresponding to the frequency of the compressor, and the indoor fan operates at a preset indoor 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 amount and / or the battery power, comprising: when the photovoltaic power generation amount can meet the power corresponding to the target frequency for the operation of the photovoltaic air conditioner, the compressor is controlled to operate at the target frequency, and the operation is controlled according to the set temperature, and the remaining photovoltaic power generation amount is used to charge the battery of the photovoltaic air conditioner; when the photovoltaic power generation amount cannot meet the power corresponding to the target frequency for the operation of the photovoltaic air conditioner, the operation of the photovoltaic air conditioner is controlled according to the change of the indoor environment humidity and the battery power of the photovoltaic air conditioner; wherein the target frequency is determined according to the temperature difference between the indoor environment temperature and the set temperature.

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

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

[0010] Optionally, further comprising: in the heating mode, the cooling mode or the air supply mode, according to the carbon dioxide concentration of the room, controlling the fresh air fan of the photovoltaic air conditioner, 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 operates at a first preset speed; when the carbon dioxide concentration is greater than the 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 operates 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 operates at a third preset speed; the first preset speed is less than the second preset speed; and the second preset speed is less than the third preset speed.

[0011] Another aspect of the present application provides a control device for a photovoltaic air conditioner, comprising: a dehumidification control unit configured to control a frequency of a compressor, a speed of an outdoor fan and a speed of an indoor fan according to a humidity difference between an indoor environment humidity and a set humidity in a dehumidification mode; a temperature and dehumidification control unit configured to control the photovoltaic air conditioner according to a photovoltaic power generation amount of the photovoltaic air conditioner and / or a battery power amount of the photovoltaic air conditioner in a temperature and dehumidification mode; and a heat exchange control unit configured to control the photovoltaic air conditioner according to an indoor environment temperature and a set temperature in a refrigeration mode or a heating mode, in combination with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner.

[0012] Optionally, the dehumidification control unit controls the frequency of the compressor, the speed of the outdoor fan and the speed of the indoor fan according to the humidity difference between the indoor environment humidity and the set humidity, and comprises: 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 a current frequency; and 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, the first preset frequency being greater than the second preset frequency; the outdoor fan operates at an outdoor fan speed corresponding to the frequency of the compressor, and the indoor fan operates at a preset indoor fan speed.

[0013] Optionally, the temperature and dehumidification control unit controls the photovoltaic air conditioner according to the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount in the temperature and dehumidification mode, and comprises: when the photovoltaic power generation amount can meet a power corresponding to a target frequency for the photovoltaic air conditioner to operate, the compressor is controlled to operate at the target frequency, and the remaining photovoltaic power generation amount is used to charge the battery of the photovoltaic air conditioner; and when the photovoltaic power generation amount cannot meet the power corresponding to the target frequency for the photovoltaic air conditioner to operate, the photovoltaic air conditioner is controlled to operate according to changes in the indoor environment humidity and the battery power amount of the photovoltaic air conditioner; wherein the target frequency is determined according to a temperature difference between an indoor environment temperature and a set temperature.

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

[0015] Optionally, the heat exchange control unit controls the operation of the photovoltaic air conditioner according to the indoor environment temperature and the set temperature in the cooling mode or the heating mode, in combination 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 environment temperature and the set temperature is greater than the preset difference threshold, or in the cooling mode, when the temperature difference between the set temperature and the indoor environment temperature is greater than the preset difference threshold, the compressor is controlled to operate at the 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, the compressor is controlled to operate at the target frequency with a preset frequency reduction; after operating for the preset time, if the indoor environment temperature reduction value in the cooling mode does not reach the preset temperature reduction value or the indoor environment temperature increase value 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 the photovoltaic power generation and the battery together to meet the power corresponding to the target frequency of the photovoltaic air conditioner; after operating for the preset time, if the indoor environment temperature reduction value in the cooling mode does not reach the preset temperature reduction value or the indoor environment temperature increase value 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 the photovoltaic power generation and the battery together, and the compressor is controlled to operate at the target frequency with a preset frequency reduction.

[0016] Optionally, the control device further comprises a fresh air control unit configured to control a fresh air fan of the photovoltaic air conditioner according to a carbon dioxide concentration of the room in a heating mode, a cooling mode or a ventilation mode, wherein: when the carbon dioxide concentration is less than or equal to a first preset concentration threshold, a damper of the fresh air fan is opened, and the fresh air fan operates at a first preset rotating speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than a second preset concentration threshold, the damper of the fresh air fan is opened, and the fresh air fan operates at a second preset rotating speed; when the carbon dioxide concentration is greater than or equal to the second preset concentration threshold, the damper of the fresh air fan is opened, and the fresh air fan operates at a third preset rotating speed; the first preset rotating speed is less than the second preset rotating speed; and the second preset rotating speed is less than the third preset rotating speed.

[0017] In yet another aspect, the present application provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the preceding methods.

[0018] In yet another aspect, the present application 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 preceding methods when executing the program.

[0019] In yet another aspect, the present application provides a photovoltaic air conditioner comprising the control device of any of the preceding aspects.

[0020] In yet another aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of any of the preceding methods.

[0021] According to the technical solution of the present application, the photovoltaic (storage) power generation or residual power is detected, and corresponding control is performed in combination with environmental parameters to achieve accurate control over the use environment.

[0022] According to the technical solution of the present application, temperature and humidity can be independently controlled, temperature and humidity can be quickly controlled according to use requirements, and stable operation can be realized by photovoltaic power in off-peak hours, so that the environmental quality is improved and carbon emissions are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

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

[0025] Figure 2A structural schematic diagram of a photovoltaic air conditioner according to one embodiment of the present application is shown.

[0026] Figure 3 A method schematic diagram of another embodiment of the control method of the photovoltaic air conditioner provided by the present application is shown.

[0027] Figure 4 A method schematic diagram of one embodiment of the control method of the photovoltaic air conditioner provided by the present application is shown.

[0028] Figure 5 A structural block diagram of one embodiment of the control device of the photovoltaic air conditioner provided by the present application is shown.

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

[0030] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

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

[0033] In one embodiment, the photovoltaic air conditioner has a double four-way valve, a double flow control device and a double cylinder compressor. Figure 2 A structural schematic diagram of a photovoltaic air conditioner according to one embodiment of the present application is shown. As shown inFigure 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 heat dissipation fan 5, a first flow control device 6, a second flow control device 7, a second heat dissipation 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 double-cylinder compressor.

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

[0035] The inner unit part: the second heat exchanger 9 and the third heat exchanger 10 are connected in parallel and arranged in front and back, and connected with the outer unit through a connection pipe (2 in and 2 out).

[0036] The separator 11 is connected with the second heat exchanger 9, the compressor suction pipe and the bypass flow path where the one-way valve 12 is located through a refrigerant pipeline, to prevent liquid suction from causing compressor liquid strike. 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 reverse flow of refrigerant from causing no step-by-step heat exchange. The double four-way valves are synchronously actuated, and the temperature and humidity control is mainly completed by the double flow control devices. For example, when temperature and humidity control is performed, the first flow control device 6 is adjusted to be small, the high-humidity air is exchanged with the refrigerant after pressure reduction by throttling, to realize air cooling and dehumidification; the second flow control device 7 is adjusted to be large, and the refrigerant at a relatively high temperature is used to reheat the air after cooling and dehumidification, to realize temperature and humidity control.

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

[0038] As shown in Figure 1 According to one embodiment of the application, the control method at least comprises steps S110, S120 and S130.

[0039] In the dehumidification mode, the frequency of the compressor, the rotation speed of the outer fan and the rotation speed of the inner fan are controlled according to the humidity difference between the indoor environment humidity and the set humidity.

[0040] In one 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 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, wherein the first preset frequency is 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 a preset internal fan speed.

[0041] Specifically, in dehumidification mode, the air conditioner starts operating based on the humidity setting. The compressor frequency, outdoor unit fan speed, and 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 operates at high frequency; when 10% < △RH < 40%, the compressor maintains the current frequency; when △RH ≤ 10%, the compressor operates at low frequency, the outdoor fan speed is set according to the compressor frequency, and the indoor fan operates according to the preset indoor fan speed.

[0042] During the typical plum rain season in southern China, the dry bulb temperature is not high, but the relative humidity is very high. The moisture on the human body surface is difficult to evaporate, giving people a stuffy feeling. For example, when the dry bulb temperature is 27℃, the relative humidity should be controlled at around 47% to avoid control deviation caused by controlling only the relative humidity.

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

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

[0045] The first flow control device 6 has a larger pressure drop, so the refrigerant entering the second heat exchanger is a low-temperature, low-pressure gas-liquid two-phase refrigerant, which absorbs heat and evaporates before entering the compressor. The flow control device 7 has a smaller pressure drop, so the refrigerant entering the third heat exchanger is a medium-temperature (above the room ambient temperature) medium-pressure gas-liquid two-phase refrigerant or a high-temperature subcooled refrigerant, which reheats the air after the second heat exchanger. In this operating mode, the refrigerant before the first flow control device 6 and the second flow control device 7 is a medium-temperature, high-pressure subcooled liquid refrigerant. By changing the flow cross-sectional area of ​​the first flow control device 6 and the second flow control device 7, the refrigerant flow rate and pressure drop are controlled, thereby controlling the state of the refrigerant entering the second heat exchanger 9 and the third heat exchanger 10.

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

[0047] (1) When the photovoltaic power generation amount can meet the power corresponding to the target frequency of the photovoltaic air conditioner, 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 amount 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 environment temperature and the set temperature. For example, the target frequency can be determined according to the corresponding relationship between the temperature difference between the different indoor environment temperatures and the set temperature and the different target frequencies, and the corresponding outdoor fan target speed can also be determined according to the target frequency.

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

[0050] (2) When the photovoltaic power generation amount cannot meet the power corresponding to the target frequency of the photovoltaic air conditioner, the operation of the photovoltaic air conditioner is controlled according to the change of the indoor environment humidity and the battery power of the photovoltaic air conditioner.

[0051] Specifically, after the compressor is controlled to operate at the target frequency for a preset time, if the indoor environment humidity reduction value 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 corresponding to the target frequency of the photovoltaic air conditioner.

[0052] After the compressor is controlled to operate at the target frequency for a preset time, if the indoor environment humidity reduction value 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 operate at a reduced preset frequency.

[0053] For example, the preset power is 50% of the full power of the battery. When the photovoltaic power generation amount cannot meet the full power operation of the unit, humidity control is preferentially performed (the frequency of the compressor is adjusted according to the humidity difference between the indoor environment humidity and the set humidity), when the humidity does not decrease significantly after operating for a certain time and the battery power is greater than or equal to 50%, the battery and the photovoltaic power supply together to meet the full power operation of the unit, that is, to meet the power corresponding to the target frequency of the photovoltaic air conditioner; when the humidity does not decrease significantly after operating for a certain time but the battery power is less than 50%, the battery and the photovoltaic power supply together, and the air conditioner compressor operates at a reduced frequency.

[0054] Step S130, in the cooling mode or the heating mode, according to the indoor environment temperature and the set temperature, in combination with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner, the photovoltaic air conditioner is controlled to run.

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

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

[0057] Specifically, for Figure 2 In the cooling mode, the first flow control device 6 and the second flow control device 7 realize throttling pressure reduction, and the second heat exchanger 9 and the third heat exchanger 10 are used as control targets to realize evaporator cascade heat exchange and improve refrigeration energy efficiency.

[0058] For example, the preset power is 50% of the full power of the battery. When the difference between the indoor environment temperature and the set temperature is large (greater than a preset difference threshold), the air conditioning system operates at full power. If the photovoltaic power generation power does not meet the power corresponding to the target frequency of the compressor, the compressor operates at a preset frequency, for example, is reduced by one frequency band. When the temperature does not decrease significantly (the decrease of the indoor environment temperature does not reach a preset temperature decrease value) after a certain period of operation, and the battery power is greater than or equal to 50% of the full power of the battery, the battery and the photovoltaic power supply together to meet the full power operation of the unit.

[0059] For Figure 2 In the heating mode, the first flow control device 6 and the second flow control device 7 realize throttling and pressure reduction, and the first heat exchanger 4 is used as the control target to realize heating control.

[0060] When the difference between the set temperature and the indoor environment temperature is large (greater than a preset difference threshold), the air conditioning system operates at full power. If the photovoltaic power generation power does not meet the power corresponding to the target frequency of the compressor, the compressor operates at a preset frequency, for example, is reduced by one frequency band. When the temperature does not decrease significantly (the increase of the indoor environment temperature does not reach a preset temperature increase value) after a certain period of operation, the battery and the photovoltaic power supply together to meet the full power operation of the unit.

[0061] Figure 3 is another embodiment of the control method of the photovoltaic air conditioner provided by the application.

[0062] As Figure 3 According to one embodiment of the application, the control method further comprises 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 of 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 opened, and the fresh air fan operates at a first preset speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than a second preset concentration threshold, the air valve of the fresh air fan is opened, and the fresh air fan operates 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 opened, and the fresh air fan operates 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, in the refrigeration, heating or air supply mode, the ventilation function can be set, according to the comparison of the detected carbon dioxide concentration and the system preset value, when the concentration c≤1000ppm, the air valve is opened, the fresh air fan runs at low speed (first preset speed); when 1000 Figure 2 In the photovoltaic air conditioner in the embodiment shown, 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 the large fluctuation of temperature and humidity affecting the comfort.

[0066] To clearly illustrate the technical scheme of the present application, the execution flow of the control method of the photovoltaic air conditioner provided by the present application is described below with one specific embodiment.

[0067] Figure 4 is a method schematic diagram of one specific embodiment of the control method of the photovoltaic air conditioner provided by the present application. As Figure 4 shown, in the dehumidification mode, the air conditioning system is started to run according to the humidity setting, and the compressor frequency, the outdoor fan speed and the indoor fan speed are controlled according to the difference ΔRH of the indoor environmental humidity detected by the sensor and the set humidity. When ΔRH≥40%, the compressor runs at high frequency; when 10%<ΔRH<40%, the compressor maintains the current frequency; when ΔRH≤10%, the compressor runs at low frequency. The outdoor fan runs at the corresponding outdoor fan speed set according to the compressor frequency, and the indoor fan runs at the preset indoor fan speed. The electronic expansion valve is controlled according to the temperature difference Δt2 of the detected indoor environmental temperature and the set temperature.

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

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

[0070] In the refrigeration, heating or air supply mode, the ventilation function can be set, and when the detected carbon dioxide concentration is compared with the system preset value, the air valve is opened, and the fresh air fan runs at low speed when the concentration c≤1000ppm; the fresh air fan runs at medium speed when 1000

[0071] Figure 5 is a structural block diagram of an embodiment of the control device of the photovoltaic air conditioner provided by the application. As shown in Figure 5 The control device 100 of the photovoltaic air conditioner comprises a dehumidification control unit 110, a temperature control and dehumidification unit 120 and a heat exchange control unit 130.

[0072] The dehumidification control unit 110 is used to control the compressor frequency, the outer fan speed and the inner 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 run 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 the current frequency; and when the humidity difference is less than or equal to a third preset humidity value, the compressor is controlled to run at a second preset frequency, the first preset frequency is greater than the second preset frequency; the outer fan runs at the outer fan speed corresponding to the compressor frequency, and the inner fan runs at a preset inner fan speed.

[0074] Specifically, in the dehumidification mode, the air conditioner is started to run according to the humidity setting, and the compressor frequency, the outer fan speed and the inner fan speed are controlled according to the difference ΔRH between the indoor environment humidity detected by the sensor and the set humidity. When ΔRH≥40%, the compressor runs at high frequency; when 10%<ΔRH<40%, the compressor maintains the current frequency; and when ΔRH≤10%, the compressor runs at low frequency, the outer fan runs at the outer fan speed corresponding to the compressor frequency, and the inner fan runs at a preset inner 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 amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner in the temperature control and dehumidification mode.

[0076] Specifically, for Figure 2The photovoltaic air conditioner shown, in the temperature control and dehumidification mode, controls the inlet and outlet refrigerant states of the second heat exchanger 9 and the third heat exchanger 10 by controlling the first flow control device 6 and the second flow control device 7, the third heat exchanger 10 is the low-temperature side, the temperature is lowered and the humidity is removed, the second heat exchanger 9 is the high-temperature side, the air after the temperature is lowered and the humidity is removed is reheated, so as to realize temperature control and dehumidification.

[0077] The first flow control device 6 has a large pressure drop, and the second heat exchanger is entered as low-temperature and low-pressure gas-liquid two-phase refrigerant, which is evaporated after heat absorption and enters the compressor; the flow control device 7 has a small pressure drop, and the third heat exchanger is entered as medium-temperature (higher than the indoor ambient temperature) and medium-pressure gas-liquid two-phase refrigerant or high-temperature supercooled refrigerant, which reheats 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 refrigerant, and the flow and pressure drop of the refrigerant are controlled by changing the flow area of the first flow control device 6 and the second flow control device 7, thereby controlling the state of the refrigerant entering the second heat exchanger 9 and the third heat exchanger 10.

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

[0079] (1) When the photovoltaic power generation amount can meet the power corresponding to the target frequency of the photovoltaic air conditioner, control the compressor to operate at the target frequency, and control according to the set temperature, and the remaining photovoltaic power generation amount 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 environment temperature and the set temperature. For example, the target frequency can be determined according to the corresponding relationship between the temperature difference between the different indoor environment temperatures and the set temperature and the different target frequencies, and the corresponding outdoor fan target speed can also be determined according to the target frequency.

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

[0082] (2) When the photovoltaic power generation amount cannot meet the power corresponding to the target frequency of the photovoltaic air conditioner, control the operation of the photovoltaic air conditioner according to the change of the indoor environment humidity and the battery power of the photovoltaic air conditioner.

[0083] Specifically, if the decrease of the indoor environment humidity does not reach the preset humidity decrease value and the battery power is greater than or equal to the preset power after the compressor is controlled to operate at the target frequency for the preset time, the photovoltaic air conditioner is powered by the photovoltaic power generation and the battery together to meet the power corresponding to the target frequency of the photovoltaic air conditioner.

[0084] If the decrease of the indoor environment humidity does not reach the preset humidity decrease value and the battery power is less than the preset power after the compressor is controlled to operate at the target frequency for the preset time, the photovoltaic air conditioner is powered by the photovoltaic power generation and the battery together, and the compressor is controlled to operate at a 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, the humidity control is preferentially performed (the frequency of the compressor is adjusted according to the humidity difference between the indoor environment humidity and the set humidity), when the humidity does not decrease significantly after operating for a certain time and the battery power is greater than or equal to 50%, the battery and the photovoltaic power supply together to meet the full power operation of the unit, that is, the full power operation corresponding to the target frequency of the photovoltaic air conditioner; when the humidity does not decrease significantly after operating for a certain time but the battery power is less than 50%, the battery and the photovoltaic power supply together, and the air conditioner compressor operates at a reduced frequency.

[0086] The heat exchange control unit 130 is configured to control the operation of the photovoltaic air conditioner according to the indoor environment 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 in the cooling mode or the heating mode.

[0087] In one 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 the target frequency. When the photovoltaic power generation of the photovoltaic air conditioner cannot meet the power requirements of the photovoltaic air conditioner operating at the target frequency, the compressor is controlled to operate at a preset frequency lower than the target frequency. After a preset operating time, if the decrease in indoor ambient temperature in cooling mode does not reach the preset temperature decrease value or the increase in indoor ambient temperature in heating mode does not reach the preset temperature increase value, and the battery charge is greater than or equal to the preset charge, the compressor is controlled to operate at the target frequency, and the photovoltaic power generation and the battery jointly supply power to the photovoltaic air conditioner to meet the power requirements of the photovoltaic air conditioner operating at the target frequency. After a preset operating time, if the decrease in indoor ambient temperature in cooling mode does not reach the preset temperature decrease value or the increase in indoor ambient temperature in heating mode does not reach the preset temperature increase value, and the battery charge is less than the preset charge, the photovoltaic power generation and the battery jointly supply power to the photovoltaic air conditioner, and the compressor is controlled to operate at a preset frequency lower than the target frequency.

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

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

[0090] For example, the preset power level is 50% of the battery's full capacity. 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 operates at full power. If the photovoltaic power generation does not meet the power required for the compressor's target frequency, the compressor operates at a preset frequency, for example, by one frequency band. If the temperature does not decrease significantly after a certain period of operation (the decrease in indoor ambient temperature does not reach the preset temperature decrease value) and the battery power is ≥ 50% of the battery's full capacity, the battery and photovoltaic power supply together to meet the unit's full power operation requirements. If the temperature does not decrease significantly after a certain period of operation but the battery power is < 50% of the battery's full capacity, the battery and photovoltaic power supply together, and the air conditioning compressor operates at a lower frequency band.

[0091] for Figure 2The photovoltaic air conditioner shown, in the heating mode, the first flow control device 6 and the second flow control device 7 realize throttling pressure reduction, and the first heat exchanger 4 is taken as the control target to realize heating control.

[0092] When the difference between the set temperature and the indoor environment temperature is large (greater than a preset difference threshold), the air conditioning system operates at full power, and if the photovoltaic power does not meet the power corresponding to the target frequency of the compressor, the compressor operates at a preset frequency, for example, is reduced by one frequency band, and when the temperature does not increase significantly (the increase of the indoor environment temperature in the heating mode does not reach the preset temperature increase value) after a certain period of operation, the battery and the photovoltaic are powered together to meet the full power operation of the unit.

[0093] Figure 6 is another embodiment of the control device of the photovoltaic air conditioner provided by the application. As shown in Figure 6 The control device 100 of the photovoltaic air conditioner further comprises a fresh air control unit 140.

[0094] The fresh air control unit 140 is configured to control the fresh air fan of the photovoltaic air conditioner according to the carbon dioxide concentration of the room in the heating mode, the cooling mode or the 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 opened, and the fresh air fan operates at a first preset rotating speed; when the carbon dioxide concentration is greater than the first preset concentration threshold and less than a second preset concentration threshold, the air valve of the fresh air fan is opened, and the fresh air fan operates at a second preset rotating 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 opened, and the fresh air fan operates at a third preset rotating speed; the first preset rotating speed is less than the second preset rotating speed; and the second preset rotating speed is less than the third preset rotating speed.

[0096] Specifically, in the cooling, heating or air supply mode, the ventilation function can be set, and according to the comparison between the detected carbon dioxide concentration and the system preset value, when the concentration c is less than or equal to 1000 ppm, the air valve is opened, and the fresh air fan operates at a low speed (the first preset rotating speed); when 1000 < c < 1500 ppm, the fresh air fan operates at a medium speed (the second preset rotating speed); and when c is greater than or equal to 1500 ppm, the fresh air fan operates at a high speed (the third preset rotating speed). For the foregoing Figure 2 The photovoltaic air conditioner in the embodiment shown introduces fresh air through the second heat exchanger 9 and the third heat exchanger 10, which can improve the indoor environment quality while avoiding large temperature and humidity fluctuations that affect comfort.

[0097] The application further provides a storage medium corresponding to the control method of the photovoltaic air conditioner, which has a computer program stored thereon, and the computer program is executed by a processor to realize the steps of any of the foregoing methods.

[0098] The application further provides a photovoltaic air conditioner corresponding to the control method of the photovoltaic air conditioner, which comprises a processor, a memory, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to realize the steps of any of the foregoing methods.

[0099] The application further provides a photovoltaic air conditioner corresponding to the control device of the photovoltaic air conditioner, which comprises the control device of any of the foregoing photovoltaic air conditioners.

[0100] The application further provides a computer program product corresponding to the control method of the photovoltaic air conditioner, which comprises a computer program, and the computer program is executed by a processor to realize the steps of any of the foregoing methods.

[0101] According to the scheme, the photovoltaic (storage) power generation or residual power is detected, and the air conditioning system performs corresponding control to realize accurate control of the use environment.

[0102] In the temperature control scheme, the photovoltaic air conditioner system is started according to the temperature setting; when the temperature control + humidity control is performed, the priority of temperature control or humidity control is determined according to the setting, and the new air valve and the fan are opened when the new air is set.

[0103] The scheme combines the low energy consumption characteristics of the photovoltaic air conditioner, realizes control of several important parameters affecting air quality, and improves the use comfort.

[0104] According to the technical scheme, the photovoltaic (storage) clean energy is fully utilized, the user's use comfort is ensured, and the energy consumption is saved.

[0105] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transferred over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions can also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, "or" as used in a list of items prefaced by "comprising" to indicate a disjunctive list means each single item in the list has been recited before "or" one or more additional disjunctive items also have been recited. However, "or" in such a phrase does not mean that the list is inclusive of at least one of the items. Further, as used herein, "comprising" is to be interpreted as including the more restrictive terms "consisting of" and "consisting essentially of."

[0106] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and other division manners can be used in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, units or modules, which can be electrical or other forms.

[0107] The units described as separate components can or can not be physically separated, and the components of the control device can or can not be physical units, i.e. can be located in one place or can be distributed on a plurality of units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0108] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the related art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0109] The above merely illustrates the embodiments of the present application but should not be taken as limitations. Various changes and modifications can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A control method of a photovoltaic air conditioner, characterized by, Comprise: In the dehumidification mode, the compressor frequency, the outer fan rotating speed and the inner fan rotating speed are controlled according to the humidity difference between the indoor environment humidity and the set humidity; In the temperature control and dehumidification mode, the photovoltaic air conditioner is controlled to operate according to the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner; In the refrigeration mode or the heating mode, the photovoltaic air conditioner is controlled to operate according to the indoor environment temperature and the set temperature, in combination with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner; In the temperature control and dehumidification mode, the photovoltaic air conditioner is controlled to operate according to the photovoltaic power generation amount and / or the battery power amount of the photovoltaic air conditioner, comprising: When the photovoltaic power generation amount can meet the power corresponding to the target frequency of the photovoltaic air conditioner, the compressor is controlled to operate at the target frequency, and the remaining photovoltaic power generation amount is used to charge the battery of the photovoltaic air conditioner; When the photovoltaic power generation amount cannot meet the power corresponding to the target frequency of the photovoltaic air conditioner, the photovoltaic air conditioner is controlled to operate according to the change of the indoor environment humidity and the battery power amount of the photovoltaic air conditioner, comprising: After the compressor is controlled to operate at the target frequency for a preset time, if the indoor environment humidity reduction value does not reach a preset humidity reduction value and the battery power amount of the photovoltaic air conditioner is greater than or equal to a preset power amount, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery together to meet the power corresponding to the target frequency of the photovoltaic air conditioner; After the compressor is controlled to operate at the target frequency for a preset time, if the indoor environment humidity reduction value does not reach a preset humidity reduction value and the battery power amount of the photovoltaic air conditioner is less than a preset power amount, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery together, and the compressor is controlled to operate at a preset frequency. The target frequency is determined according to the temperature difference between the indoor environment temperature and the set temperature.

2. The method of claim 1, wherein, The compressor frequency, the outer fan rotating speed and the inner fan rotating speed are controlled according to the humidity difference between the indoor environment humidity and the set humidity, comprising: 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 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 outer fan operates at the outer fan rotating speed corresponding to the compressor frequency, and the inner fan operates at a preset inner fan rotating speed.

3. The method according to claim 1 or 2, characterized in that, In the refrigeration mode or the heating mode, the photovoltaic air conditioner is controlled to operate according to the indoor environment temperature and the set temperature, in combination with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power amount of the photovoltaic air conditioner, comprising: In the refrigeration mode, when the temperature difference between the indoor environment temperature and the set temperature is greater than a preset difference threshold, or in the refrigeration mode, when the temperature difference between the set temperature and the indoor environment temperature is greater than a preset difference threshold, the compressor is controlled to operate at a target frequency; When the photovoltaic power generation amount of the photovoltaic air conditioner cannot meet the power corresponding to the target frequency for the operation of the photovoltaic air conditioner, the compressor is controlled to operate at a preset frequency reduced according to the target frequency; When the indoor environment temperature reduction value in the cooling mode or the indoor environment temperature increase value in the heating mode does not reach the preset temperature reduction value or 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 corresponding to the target frequency for the operation of the photovoltaic air conditioner; When the indoor environment temperature reduction value in the cooling mode or the indoor environment temperature increase value in the heating mode does not reach the preset temperature reduction value or 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 reduced according to the target frequency.

4. The method according to claim 1 or 2, characterized in that, Also includes: 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 of 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 opened, and the fresh air fan operates at a first preset speed; When the carbon dioxide concentration is greater than the first preset concentration threshold and less than a second preset concentration threshold, the air valve of the fresh air fan is opened, and the fresh air fan operates 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 opened, and the fresh air fan operates 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.

5. A control device for a photovoltaic air conditioner, characterized by, Including: The dehumidification control unit is configured to control the frequency of the compressor, the speed of the outdoor fan and the speed of the indoor fan according to the humidity difference between the indoor environment humidity and the set humidity in the dehumidification mode; The temperature and dehumidification control unit is configured to control the operation of the photovoltaic air conditioner according to the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner in the temperature and dehumidification mode; The heat exchange control unit is configured to control the operation of the photovoltaic air conditioner according to the indoor environment temperature and the set temperature, combined with the photovoltaic power generation amount of the photovoltaic air conditioner and / or the battery power of the photovoltaic air conditioner in the cooling mode or the heating mode; The temperature and dehumidification control unit controls the operation of the photovoltaic air conditioner according to the photovoltaic power generation amount and / or the battery power of the photovoltaic air conditioner in the temperature and dehumidification mode, including: When the photovoltaic power generation amount can meet the power corresponding to the target frequency for the operation of the photovoltaic air conditioner, the compressor is controlled to operate at the target frequency, and the set temperature is controlled, and the remaining photovoltaic power generation amount is used to charge the battery of the photovoltaic air conditioner; When the photovoltaic power generation amount cannot meet the power corresponding to the target frequency for the operation of the photovoltaic air conditioner, the operation of the photovoltaic air conditioner is controlled according to the change of the indoor environment humidity and the battery power of the photovoltaic air conditioner, including: If the indoor environment humidity reduction value does not reach the preset humidity reduction value and the battery power is greater than or equal to the preset power after the compressor is controlled to operate at the target frequency for the preset time, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery to meet the power corresponding to the target frequency of the photovoltaic air conditioner; if the indoor environment humidity reduction value does not reach the preset humidity reduction value and the battery power is less than the preset power after the compressor is controlled to operate at the target frequency for the preset time, the photovoltaic air conditioner is powered by photovoltaic power generation and the battery, and the compressor is controlled to operate at a preset frequency. The target frequency is determined according to a temperature difference between the indoor environment temperature and a set temperature.

6. A storage medium, characterized by A computer program is stored thereon, and the program is executed by a processor to implement the steps of the method of any one of claims 1-4.

7. A photovoltaic air conditioner characterized by, A computer program is stored thereon, and the program is executed by a processor to implement the steps of the method of any one of claims 1-4.

8. A computer program product, characterised in that, A computer program is stored thereon, and the program is executed by a processor to implement the steps of the method of any one of claims 1-4.

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