Control methods and devices for photovoltaic air conditioners, photovoltaic air conditioners

Abstract

This invention discloses a control method and device for a photovoltaic air conditioner, and the photovoltaic air conditioner itself. The method includes: when the outdoor ambient temperature is determined to be greater than a first temperature threshold and a second temperature threshold, increasing the current rotational speed of the air conditioner's outdoor fan by a first predetermined speed value to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporator side; adjusting the operating state of the electric heating module and / or compressor of the photovoltaic air conditioner according to a first evaporation temperature difference between every two adjacent first evaporation temperature values ​​to further increase the outdoor evaporator side temperature and reduce the frosting rate on the outdoor evaporator side. This invention solves the technical problem in related technologies where, during the reverse circulation of heat circulation in an air conditioner, defrosting the condenser leads to a decrease in indoor temperature, causing water vapor to be blown out when the room is heated again, and frequent defrosting cycles affect heating comfort.

Description

Technical Field

[0001] This invention relates to the field of home appliance control technology, and more specifically, to a control method and device for a photovoltaic air conditioner, and a photovoltaic air conditioner. Background Technology

[0002] With the continuous development of photovoltaic direct-drive air conditioning, photovoltaic air conditioning has been applied to more and more usage scenarios. However, in terms of heating, photovoltaic air conditioning still has the same problems as traditional air conditioning. Therefore, a technical solution that offers superior heating performance compared to ordinary heat pump air conditioning can be proposed, taking into account the characteristics of photovoltaic air conditioning. This solution addresses issues such as poor defrosting in inclement weather, the impact of prolonged defrosting time on heating comfort, low energy efficiency of auxiliary heaters, and low local photovoltaic energy absorption capacity.

[0003] The conventional defrosting process uses a four-way valve to reverse the heating cycle, thereby heating the condenser to achieve defrosting. This causes the indoor temperature to drop, and when the room is heated again, water vapor will be blown out. Frequent defrosting cycles negatively impact heating comfort.

[0004] Regarding the issue that during the reverse heat circulation process of the air conditioner mentioned above, the indoor temperature drops due to the heating of the condenser for defrosting, and water vapor is blown out when the room is heated again, and the frequent defrosting process affects the heating comfort, no effective solution has been proposed yet. Summary of the Invention

[0005] This invention provides a control method and device for a photovoltaic air conditioner, and a photovoltaic air conditioner, to at least solve the technical problem in the related art that, during the reverse circulation of heat circulation in an air conditioner, the indoor temperature drops due to the heating of the condenser for defrosting, and water vapor is blown out when the room is heated again, and frequent defrosting affects the heating comfort.

[0006] According to one aspect of the present invention, a control method for a photovoltaic air conditioner is provided, comprising: when the photovoltaic air conditioner is turned on and operating in heating mode, acquiring the outdoor ambient temperature of the photovoltaic air conditioner; when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, controlling the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold; when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the photovoltaic air conditioner's current rotation speed is greater than a second temperature threshold, controlling the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, so as to increase the outdoor evaporator side temperature and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold; when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the outdoor fan of the air conditioner is greater than a second temperature threshold, controlling the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, thereby increasing the outdoor evaporator side temperature and reducing the frosting rate of the outdoor evaporator side temperature, controlling the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, so as to increase the outdoor evaporator side temperature and reduce the frosting rate of the outdoor evaporator side temperature, thereby increasing the outdoor evaporator side temperature and reducing the frosting rate of the outdoor evaporator side temperature, wherein the outdoor ambient temperature is not greater than the first temperature threshold and the outdoor fan temperature is greater than a second temperature threshold, controlling the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, thereby increasing the outdoor evaporator side temperature and reducing the frosting rate of the outdoor evaporator side temperature, wherein the outdoor ambient temperature is not greater than the first temperature threshold and the outdoor fan temperature When the photovoltaic power generation module's power output information indicates that the photovoltaic power generation module has no power output, the current evaporation temperature of the outdoor evaporation side is obtained. When it is determined that the current evaporation temperature is greater than the evaporation temperature threshold, the indoor fan and the outdoor fan of the photovoltaic air conditioner are controlled to reduce their second predetermined speed values ​​respectively. Multiple first evaporation temperature values ​​of the outdoor evaporation side are collected according to a predetermined cycle, and the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted according to the first evaporation temperature difference between every two adjacent evaporation temperature values, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0007] Optionally, after controlling the current speed of the outdoor fan of the photovoltaic air conditioner to increase by a first predetermined speed value, the control method of the photovoltaic air conditioner further includes: collecting multiple second evaporation temperature values ​​of the outdoor evaporation side according to the predetermined period; determining a second evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple second evaporation temperature values; when the second evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to operate at the current speed for a first predetermined time period; when the second evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the outdoor fan to increase by a third predetermined speed value, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0008] Optionally, after controlling the current speed of the outdoor fan to increase by a third predetermined speed value, the control method of the photovoltaic air conditioner further includes: collecting multiple third evaporation temperature values ​​of the outdoor evaporation side according to the predetermined period; determining a third evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple third evaporation temperature values; when the third evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to operate at the current speed for a second predetermined time period; when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, controlling the speed of the indoor fan to decrease by a fourth predetermined speed value, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0009] Optionally, the control method for the photovoltaic air conditioner further includes: when the outdoor ambient temperature is determined to be no greater than the second temperature threshold, controlling the current speed of the outdoor fan to increase by a fifth predetermined speed value; after the outdoor fan increases by the fifth predetermined speed value, collecting multiple fourth evaporation temperature values ​​on the outdoor evaporator side according to the predetermined cycle; determining a fourth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fourth evaporation temperature values; when the fourth evaporation temperature difference value is no greater than the evaporation temperature difference threshold, continuing to control the current speed of the indoor fan to decrease by a sixth predetermined speed value, and controlling the frequency of the compressor to decrease by a first predetermined frequency value.

[0010] Optionally, multiple first evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined period, and the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted according to the first evaporation temperature difference between every two adjacent evaporation temperature values. This includes: when it is determined that the first evaporation temperature difference is not a predetermined temperature difference threshold, controlling the current speed of the indoor fan to decrease by a seventh predetermined speed value and controlling the frequency of the compressor to decrease by a second predetermined frequency value; collecting multiple fifth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined period, and determining the fifth evaporation temperature difference between every two adjacent evaporation temperature values; and controlling the electric heating module to turn on when the fifth evaporation temperature difference is not the predetermined temperature difference threshold.

[0011] Optionally, the control method of the photovoltaic air conditioner further includes: during the operation of the electric heating module, if the reversal of the defrosting four-way valve of the photovoltaic air conditioner is detected, the electric heating module is controlled to shut down.

[0012] Optionally, the control method for the photovoltaic air conditioner further includes: when it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold, controlling the current speed of the outdoor fan to decrease by an eighth speed value; collecting multiple sixth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined cycle, and determining the sixth evaporation temperature difference value between every two adjacent sixth evaporation temperature values; when it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold, controlling the speed of the indoor fan to continue to decrease by a ninth speed value, and simultaneously controlling the electric heating module to turn on.

[0013] Optionally, the control method of the photovoltaic air conditioner further includes: if the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, when it is determined that the outdoor ambient temperature is not greater than the third temperature threshold, controlling the current speed of the outdoor fan to increase by a tenth speed value, and collecting multiple seventh evaporation temperature values ​​on the outdoor evaporation side according to the predetermined cycle, and determining the seventh evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple seventh evaporation temperature values; when the seventh evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the outdoor fan to increase by an eleventh speed value, and collecting multiple eighth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined cycle, and determining the eighth evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple eighth evaporation temperature values; when the eighth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, controlling the electric heating module to turn on, and controlling the current speed of the indoor fan to increase by a twelfth speed value.

[0014] According to another aspect of the present invention, a control device for a photovoltaic air conditioner is also provided, comprising: a first acquisition unit, configured to acquire the outdoor ambient temperature of the photovoltaic air conditioner when the photovoltaic air conditioner is turned on and operating in heating mode; a first control unit, configured to, when determining that the outdoor ambient temperature is greater than a first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, control the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold; and a second acquisition unit, configured to, when determining that the outdoor ambient temperature is not greater than the first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, control the current rotation speed of the outdoor fan of the air conditioner to increase by a first predetermined rotation speed value, so as to increase the outdoor evaporator side temperature ... The photovoltaic power generation module of the photovoltaic air conditioner outputs power information indicating that the photovoltaic power generation module has no power output, and obtains the current evaporation temperature of the outdoor evaporation side; the second control unit is used to control the indoor fan and the outdoor fan of the photovoltaic air conditioner to reduce the second predetermined speed value respectively when it is determined that the current evaporation temperature is greater than the evaporation temperature threshold; the third control unit is used to collect multiple first evaporation temperature values ​​of the outdoor evaporation side according to a predetermined period, and adjust the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner according to the first evaporation temperature difference value between every two adjacent evaporation temperature values, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0015] Optionally, the control device of the photovoltaic air conditioner further includes: a first acquisition unit, used to acquire multiple second evaporation temperature values ​​of the outdoor evaporation side according to the predetermined period; a first determination unit, used to determine a second evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple second evaporation temperature values; a third control unit, used to control the outdoor fan to run at the current speed for a first predetermined time period when the second evaporation temperature difference value is greater than the evaporation temperature difference threshold; and a fourth control unit, used to continue to control the current speed of the outdoor fan to increase by a third predetermined speed value when the second evaporation temperature difference value is not greater than the evaporation temperature difference threshold, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0016] Optionally, the control device of the photovoltaic air conditioner further includes: a second acquisition unit, configured to acquire multiple third evaporation temperature values ​​of the outdoor evaporation side according to the predetermined cycle after controlling the current speed of the outdoor fan to increase by a third predetermined speed value; a second determination unit, configured to determine the third evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple third evaporation temperature values; a fifth control unit, configured to control the outdoor fan to operate at the current speed for a second predetermined time period when the third evaporation temperature difference value is greater than the evaporation temperature difference threshold; and a sixth control unit, configured to control the speed of the indoor fan to decrease by a fourth predetermined speed value when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0017] Optionally, the control device of the photovoltaic air conditioner further includes: a seventh control unit, used to control the current speed of the outdoor fan to increase by a fifth predetermined speed value when the outdoor ambient temperature is determined to be no greater than the second temperature threshold; a third acquisition unit, used to acquire multiple fourth evaporation temperature values ​​of the outdoor evaporator side according to the predetermined cycle after the outdoor fan increases by the fifth predetermined speed value; a third determination unit, used to determine the fourth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fourth evaporation temperature values; and an eighth control unit, used to continue to control the current speed of the indoor fan to decrease by a sixth predetermined speed value and control the frequency of the compressor to decrease by a first predetermined frequency value when the fourth evaporation temperature difference value is no greater than the evaporation temperature difference threshold.

[0018] Optionally, the third control unit includes: a first control module, configured to, when determining that the first evaporation temperature difference is not a predetermined temperature difference threshold, control the current speed of the internal fan to decrease by a seventh predetermined speed value and control the frequency of the compressor to decrease by a second predetermined frequency value; a first acquisition module, configured to acquire multiple fifth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined cycle, and determine the fifth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fifth evaporation temperature values; and a second control module, configured to, when the fifth evaporation temperature difference is not the predetermined temperature difference threshold, control the electric heating module to turn on.

[0019] Optionally, the control device of the photovoltaic air conditioner further includes: a third control module, used to control the electric heating module to shut down if the reversal of the defrosting four-way valve of the photovoltaic air conditioner is detected during the start-up process of the electric heating module.

[0020] Optionally, the control device of the photovoltaic air conditioner further includes: a ninth control unit, used to control the current speed of the outdoor fan to decrease by an eighth speed value when it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold; a fourth acquisition unit, used to acquire multiple sixth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined cycle, and determine the sixth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple sixth evaporation temperature values; and a tenth control unit, used to control the speed of the indoor fan to continue to decrease by a ninth speed value when it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold, and simultaneously control the electric heating module to turn on.

[0021] Optionally, the control device of the photovoltaic air conditioner further includes: an eleventh control unit, configured to, when the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, and when it is determined that the outdoor ambient temperature is not greater than a third temperature threshold, control the current speed of the outdoor fan to increase by a tenth speed value, and collect multiple seventh evaporation temperature values ​​on the outdoor evaporation side according to the predetermined period, and determine the seventh evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple seventh evaporation temperature values; and a twelfth control unit, configured to, when the seventh evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continue to control the current speed of the outdoor fan to increase by an eleventh speed value, and collect multiple eighth evaporation temperature values ​​on the outdoor evaporation side according to the predetermined period, and determine the eighth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple eighth evaporation temperature values;

[0022] Optionally, the control device of the photovoltaic air conditioner further includes: a thirteenth control unit, used to control the electric heating module to turn on when the eighth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, and to control the current speed of the internal fan to increase by a twelfth speed value.

[0023] According to another aspect of the present invention, a photovoltaic air conditioner is also provided, wherein the photovoltaic air conditioner uses the control method of the photovoltaic air conditioner described in any one of the above embodiments.

[0024] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method of the photovoltaic air conditioner described in any one of the above embodiments.

[0025] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes the control method for a photovoltaic air conditioner as described in any one of the above embodiments.

[0026] In this embodiment of the invention, when the photovoltaic air conditioner is turned on and operating in heating mode, the outdoor ambient temperature of the photovoltaic air conditioner is acquired; when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and a second temperature threshold, the current speed of the outdoor fan of the air conditioner is increased by a first predetermined speed value, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side, wherein the first temperature threshold is less than the second temperature threshold; when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output, the current evaporation temperature of the outdoor evaporation side is acquired; when it is determined that the current evaporation temperature is less than the evaporation temperature threshold, the indoor fan and the outdoor fan of the photovoltaic air conditioner are controlled to decrease by a second predetermined speed value respectively; multiple first evaporation temperature values ​​of the outdoor evaporation side are collected according to a predetermined period, and the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted according to the first evaporation temperature difference value between every two adjacent evaporation temperature values, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side. The technical solution provided by this invention achieves the goal of determining the operating status of the indoor and outdoor fans, compressors, and electric heating modules of a photovoltaic air conditioner based on the outdoor ambient temperature, weather conditions, and the evaporation temperature on the outdoor evaporator side. This reduces the frosting rate on the outdoor evaporator side, thereby reducing the frequency of the air conditioner entering the defrosting stage and improving the operational stability of the photovoltaic air conditioner. Furthermore, it solves the technical problem in related technologies where, during the reverse circulation of heat circulation in an air conditioner, the heating of the condenser for defrosting leads to a decrease in indoor temperature, and water vapor is blown out when the room is heated again, causing frequent defrosting to affect heating comfort. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a hardware structure block diagram of a mobile terminal for a control method of a photovoltaic air conditioner according to an embodiment of the present invention.

[0029] Figure 2 This is a flowchart of a control method for a photovoltaic air conditioner according to an embodiment of the present invention;

[0030] Figure 3 This is a flowchart of an optional control method for a photovoltaic air conditioner according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the control device for a photovoltaic air conditioner according to an embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] As described in the background section, in related technologies, during the reverse heat cycle of an air conditioner, the indoor temperature drops due to the heating of the condenser for defrosting. When the room is heated again, water vapor is blown out, and frequent defrosting cycles negatively impact heating comfort. This invention provides a control method and apparatus for a photovoltaic air conditioner, a photovoltaic air conditioner, a computer-readable storage medium, and a processor.

[0035] It should be noted that in this embodiment of the invention, the energy characteristics of photovoltaic air conditioners and the optimized operation strategy of the air conditioning mechanism are utilized to achieve continuous defrosting or reduce the frequency of defrosting shutdowns. From the perspective of the principle of frosting or freezing, when water reaches 0 degrees Celsius at 1 atmosphere, if it continues to release heat or cool down, the liquid water will condense into ice. When the temperature is below 0 degrees Celsius, gaseous water will condense into ice on the surface of a low-temperature object or in the air; this phenomenon is called condensation. Different defrosting strategies are used for these two situations. The purpose of defrosting is to ensure the heat exchange effect of the condenser. Therefore, various methods, such as preventing or slowing down the frosting rate, accelerating defrosting, and advancing defrosting, together constitute the key elements for improving the heating effect of photovoltaic air conditioners.

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a control method of a photovoltaic air conditioner according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0038] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the control method of the photovoltaic air conditioner in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0039] According to an embodiment of the present invention, a method embodiment for controlling a photovoltaic air conditioner is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0040] Figure 2 This is a flowchart of a control method for a photovoltaic air conditioner according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following steps:

[0041] Step S202: When the photovoltaic air conditioner is turned on and running in heating mode, obtain the outdoor ambient temperature of the photovoltaic air conditioner.

[0042] In this embodiment of the invention, the main focus is on adjusting the operation of the photovoltaic air conditioner in heating mode to reduce the frosting rate of the outdoor evaporator; therefore, the outdoor ambient temperature is an important factor to consider. Thus, in this embodiment of the invention, when it is determined that the photovoltaic air conditioner is operating in heating mode, the outdoor ambient temperature of the photovoltaic air conditioner can be obtained.

[0043] Step S204: When it is determined that the outdoor ambient temperature is greater than the first temperature threshold and the outdoor ambient temperature is greater than the second temperature threshold, the current speed of the outdoor fan of the air conditioner is increased by a first predetermined speed value, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side, wherein the first temperature threshold is less than the second temperature threshold.

[0044] When the outdoor ambient temperature is greater than the first temperature threshold, for example, when the outdoor ambient temperature is greater than 0℃, it can be further determined whether the outdoor ambient temperature is greater than the second preset temperature threshold, for example, whether the outdoor ambient temperature is greater than 3℃. If so, the current drilling speed of the outdoor fan of the photovoltaic air conditioner is increased by the first preset speed, for example, the speed of the outdoor fan can be increased by 100 revolutions.

[0045] Step S206: When it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output, the current evaporation temperature of the outdoor evaporation side is obtained.

[0046] In this embodiment, when it is determined that the outdoor ambient temperature is not greater than a first temperature threshold, for example, the outdoor ambient temperature is not greater than 0°C, and it is determined that the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, it is determined that the current weather is bad, and the current evaporation temperature of the outdoor evaporation side can continue to be obtained.

[0047] Step S208: When it is determined that the current evaporation temperature is greater than the evaporation temperature threshold, the indoor and outdoor fans of the photovoltaic air conditioner are controlled to reduce the second predetermined speed value respectively.

[0048] In this embodiment, if it is determined that the current evaporation temperature on the outdoor evaporation side is greater than the evaporation temperature threshold, the indoor and outdoor fans of the photovoltaic air conditioner are controlled to reduce their second predetermined speed values, for example, the indoor and outdoor fans of the air conditioner are controlled to reduce their speeds by 150 revolutions per minute to reduce the coverage of wind and snow on the condenser.

[0049] Step S210: Collect multiple first evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and adjust the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner according to the first evaporation temperature difference between every two adjacent first evaporation temperature values, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0050] In this embodiment, the outdoor evaporation temperature (i.e., the first evaporation temperature value) can be detected once every 3 seconds according to a predetermined collection cycle. The evaporation temperature difference between any two adjacent first evaporation temperature values ​​is determined to be an evaporation temperature difference threshold. Based on the determination result, the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side. This can reduce or avoid the number of times the air conditioner compressor shuts down due to protection, thereby improving the stability of the photovoltaic air conditioner.

[0051] As described above, in this embodiment of the invention, when the photovoltaic air conditioner is running in heating mode, the outdoor ambient temperature of the photovoltaic air conditioner can be obtained; when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and a second temperature threshold, the current speed of the air conditioner's outdoor fan is increased by a first predetermined speed value, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold; when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output, the current evaporation temperature of the outdoor evaporator side is obtained; when it is determined that the current evaporation temperature is greater than the evaporation temperature threshold, the photovoltaic air conditioner is controlled... The indoor and outdoor fans are reduced to a second predetermined speed value; multiple first evaporation temperature values ​​on the outdoor evaporator side are collected according to a predetermined cycle, and the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted according to the first evaporation temperature difference between each two adjacent first evaporation temperature values, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporator side. This achieves the purpose of determining the operating status of the indoor and outdoor fans, compressor and electric heating module of the photovoltaic air conditioner according to the outdoor ambient temperature, weather conditions and outdoor evaporator side evaporation temperature, so that the operating status of the photovoltaic air conditioner can reduce the frosting rate on the outdoor evaporator side, thereby reducing the frequency of the air conditioner entering the defrosting stage and improving the operating stability of the photovoltaic air conditioner.

[0052] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that when an air conditioner is in the reverse cycle of heat circulation, the indoor temperature will drop due to the heating of the condenser to defrost, and water vapor will be blown out when the room is heated again, and frequent defrosting will affect the heating comfort.

[0053] According to the above embodiments of the present invention, after controlling the current speed of the outdoor fan of the photovoltaic air conditioner to increase by a first predetermined speed value, the control method of the photovoltaic air conditioner may further include: collecting a plurality of second evaporation temperature values ​​on the outdoor evaporation side according to a predetermined period; determining a second evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the plurality of second evaporation temperature values; when the second evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to operate at the current speed for a first predetermined time period; when the second evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the outdoor fan to increase by a third predetermined speed value, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0054] In this embodiment, after the rotation speed of the outdoor fan of the photovoltaic air conditioner is increased by 100 revolutions, multiple second evaporation temperature values ​​on the outdoor evaporation side can be collected according to a predetermined collection period. The second evaporation temperature difference value between each two adjacent evaporation temperature values ​​can be determined. When the second evaporation temperature difference value is greater than the evaporation temperature difference threshold, the outdoor fan is controlled to run at the current rotation speed for a first predetermined time period. Otherwise, the current rotation speed of the outdoor fan is controlled to increase by a third predetermined rotation speed value, for example, 200 revolutions, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0055] According to the above embodiments of the present invention, after controlling the current speed of the outdoor fan to increase by a third predetermined speed value, the control method of the photovoltaic air conditioner may further include: collecting multiple third evaporation temperature values ​​on the outdoor evaporation side according to a predetermined period; determining a third evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple third evaporation temperature values; when the third evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to operate at the current speed for a second predetermined time period; when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, controlling the speed of the indoor fan to decrease by a fourth predetermined speed value, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0056] After the outdoor fan speed of the photovoltaic air conditioner increases by a third predetermined speed, multiple third evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle; the third evaporation temperature difference value between each two adjacent evaporation temperature values ​​is determined; when the third evaporation temperature difference value is greater than the evaporation temperature difference threshold, the outdoor fan is controlled to run at the current speed for a second predetermined time period; when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, the speed of the indoor fan is controlled to decrease by a fourth predetermined speed value, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0057] According to the above embodiments of the present invention, the control method of the photovoltaic air conditioner further includes: when it is determined that the outdoor ambient temperature is not greater than a second temperature threshold, controlling the current speed of the outdoor fan to increase by a fifth predetermined speed value; after the outdoor fan increases by a fifth predetermined speed value, collecting a plurality of fourth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle; determining a fourth evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the plurality of fourth evaporation temperature values; when the fourth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the indoor fan to decrease by a sixth predetermined speed value, and controlling the frequency of the compressor to decrease by a first predetermined frequency value.

[0058] In this embodiment, if it is determined that the outdoor ambient temperature is not greater than the second temperature threshold, for example, when the outdoor ambient temperature is ≤3℃, the speed of the outdoor fan can be increased by 200 revolutions, and multiple fourth evaporation temperature values ​​on the outdoor evaporation side can be collected according to a predetermined cycle; the fourth evaporation temperature difference value between each two adjacent evaporation temperature values ​​can be determined; when the fourth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, the current speed of the indoor fan can be reduced by a sixth predetermined speed value, and the frequency of the compressor can be reduced by a first predetermined frequency value.

[0059] According to the above embodiments of the present invention, collecting multiple first evaporation temperature values ​​on the outdoor evaporation side at a predetermined period, and adjusting the operating state of the electric heating module and / or compressor of the photovoltaic air conditioner according to the first evaporation temperature difference between every two adjacent evaporation temperature values, may include: when it is determined that the first evaporation temperature difference is not a predetermined temperature difference threshold, controlling the current speed of the indoor fan to decrease by a seventh predetermined speed value, and controlling the frequency of the compressor to decrease by a second predetermined frequency value; collecting multiple fifth evaporation temperature values ​​on the outdoor evaporation side at a predetermined period, and determining the fifth evaporation temperature difference between every two adjacent evaporation temperature values; and controlling the electric heating module to turn on when the fifth evaporation temperature difference is not a predetermined temperature difference threshold.

[0060] In this embodiment, when it is determined that the evaporation temperature difference is not a predetermined temperature difference threshold, the current speed of the internal fan is reduced by a seventh predetermined speed value, and the frequency of the compressor is reduced by a second predetermined frequency value; multiple fifth evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle, and the fifth evaporation temperature difference value between each two adjacent evaporation temperature values ​​is determined; when the fifth evaporation temperature difference is not a predetermined temperature difference threshold, the electric heating module is turned on.

[0061] Here, due to the current severe weather conditions, the photovoltaic (PV) power generation module may not be outputting any electricity. In this case, the electric heating module can use DC power converted from the grid supply. Of course, when the PV power generation module stores electrical energy, the electric heating module can also utilize this stored energy to enhance the PV power generation capacity of the PV air conditioner. This also improves the local energy consumption capacity of the PV power generation module; that is, the electricity output by the PV power generation module of the PV air conditioner does not need to be exported elsewhere, reducing energy loss and improving the local energy consumption capacity and overall energy utilization rate of the PV power generation module.

[0062] According to the above embodiments of the present invention, the control method of the photovoltaic air conditioner further includes: during the operation of the electric heating module, if the reversal of the defrosting four-way valve of the photovoltaic air conditioner is detected, the electric heating module is controlled to be turned off.

[0063] In this embodiment, if the defrosting four-way valve of the photovoltaic air conditioner is detected to be switching during the start-up of the electric heating module, the electric heating module is controlled to be turned off.

[0064] According to the above embodiments of the present invention, the control method of the photovoltaic air conditioner may further include: when it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold, controlling the current speed of the outdoor fan to decrease by an eighth speed value; collecting multiple sixth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determining the sixth evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple sixth evaporation temperature values; when it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold, controlling the speed of the indoor fan to continue to decrease by a ninth speed value, and simultaneously controlling the electric heating module to turn on.

[0065] In this embodiment, if it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold, the speed of the outdoor fan is increased by 100 revolutions, and multiple sixth evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle, and the sixth evaporation temperature difference value between each two adjacent sixth evaporation temperature values ​​is determined; if it is determined that the sixth evaporation temperature value is not the predetermined temperature difference threshold, the speed of the indoor fan is further reduced by the ninth speed value, and the electric heating module is turned on.

[0066] According to the above embodiments of the present invention, the control method of the photovoltaic air conditioner further includes: if the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, when it is determined that the outdoor ambient temperature is not greater than the third temperature threshold, controlling the current speed of the outdoor fan to increase by a tenth speed value, and collecting multiple seventh evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determining the seventh evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple seventh evaporation temperature values; when the seventh evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the outdoor fan to increase by an eleventh speed value, and collecting multiple eighth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determining the eighth evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple eighth evaporation temperature values; when the eighth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, controlling the electric heating module to turn on, and controlling the current speed of the indoor fan to increase by a twelfth speed value.

[0067] In this embodiment, if the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module is outputting power, it means that the current weather is fine and the photovoltaic power generation module of the photovoltaic air conditioner can output power.

[0068] When the outdoor ambient temperature is determined to be no greater than the third temperature threshold, the current speed of the outdoor fan is increased by the tenth speed value, and multiple seventh evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle. The seventh evaporation temperature difference value is determined for each two adjacent seventh evaporation temperature values. When the seventh evaporation temperature difference value is no greater than the evaporation temperature difference threshold, the current speed of the outdoor fan is increased by the eleventh speed value, and multiple eighth evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle. The eighth evaporation temperature difference value is determined for each two adjacent eighth evaporation temperature values. When the eighth evaporation temperature difference value is no greater than the evaporation temperature difference threshold, the electric heating module is turned on, and the current speed of the indoor fan is increased by the twelfth speed value.

[0069] Here, the electric heating module can consume the electrical energy output by the photovoltaic power generation module of the photovoltaic air conditioner, thereby improving the photovoltaic power generation capacity of the photovoltaic air conditioner and the local consumption capacity of the photovoltaic power generation module. In other words, the electrical energy output by the photovoltaic power generation module of the photovoltaic air conditioner does not need to be output to other places, reducing the loss of electrical energy, improving the local consumption capacity of the photovoltaic power generation module, and improving the electrical energy utilization rate of the photovoltaic power generation module.

[0070] Figure 3 This is a flowchart of an optional control method for a photovoltaic air conditioner according to an embodiment of the present invention, such as... Figure 3 As shown, when the outdoor ambient temperature is below 0 degrees Celsius, we handle different cases here. We denote the outer ambient temperature as T_ring and the condenser refrigerant evaporator temperature (i.e., the evaporation temperature on the evaporator side) as TL.

[0071] On one hand, when the weather is fine (i.e., the photovoltaic power generation module is outputting electricity), if T-loop ≤ 0 is detected, the outdoor fan speed increases by 200 revolutions per minute. This enhances external heat exchange and raises the temperature of TL. TL is checked every 3 seconds, resulting in TL0, TL1, and so on. TL1-TL0 is denoted as SL1, TL2-TL1 as SL2, and so on. If SLn > 0 and SLn+1 ≥ 0, the condition is considered valid (n ≤ 30) and maintained. Otherwise, the outdoor fan speed is increased by 300 revolutions per minute, and the current TL is re-recorded as TLO, and SL1 is re-recorded, and so on. If SLn > 0 and SLn+1 ≥ 0, the condition is considered valid (n ≤ 30) and maintained. Otherwise, indoor electric heating is activated. Due to the characteristics of photovoltaic air conditioning, in fine weather, the photovoltaic function is operating, and electric auxiliary heating can be activated without consuming grid power. The indoor fan speed increases by 100 revolutions per minute to accelerate heat exchange and prevent the system compressor from overheating, thus maintaining indoor comfort. This state is maintained until defrosting begins. When defrosting begins, this four-way valve switches to defrosting mode, while the electric heating remains on. Note that this electric heating requires DC auxiliary power, unlike ordinary AC auxiliary power. The system can choose to use photovoltaic power or grid-converted power; in this case, photovoltaic power for auxiliary heating is prioritized. After defrosting, the status of the indoor and outdoor fans and auxiliary electric heating remains unchanged, and the system re-enters the T-loop detection.

[0072] On another front, in severe weather (i.e., when the photovoltaic power generation modules are not outputting electricity), the photovoltaic power supply capacity and the grid power supply situation need to be considered. When the grid power supply system is unstable, i.e., when the AC grid voltage fluctuation exceeds ±15%, the possibility of grid paralysis due to natural disasters should be taken into account. Furthermore, the condenser is prone to frosting at this time, so priority should be given to ensuring the reliability of the photovoltaic air conditioner and the continuity of heating. Before and during defrosting, the following logic applies: When T loop ≤ 0 and TL > -10℃, reduce the outdoor fan speed by 150 rpm to reduce the coverage of the condenser by wind and snow, and reduce the indoor fan speed by 150 rpm. TL is checked every 3 seconds, and SL is continuously monitored. If SLn = 0 and then SLn+1 = 0, it is considered effective (n ≤ 30) and maintained. Otherwise, the indoor fan speed is reduced by another 150 rpm, and the compressor frequency is reduced by 10 Hz. The current TL is then re-recorded as TLO, and SL1 is re-recorded, and so on. If SLn = 0 and then SLn+1 = 0, the system is considered effective (n ≤ 30) and will continue to operate. Otherwise, the indoor electric heating will be activated until the defrosting process ends and the four-way valve reverses, at which point the electric heating will be deactivated. During this time, the electric heating uses DC power converted from the grid power supply. When the remaining power of the photovoltaic system is insufficient to sustain the current air conditioning power consumption for 16 hours, the electric auxiliary heating will be deactivated (manual activation via remote control). When the AC grid fails and cannot supply power, the electric auxiliary heating will be permanently deactivated (manual activation requires three attempts to respond).

[0073] When Tloop ≤ 0 and TL ≤ -10℃, reduce the outdoor fan speed by 100 rpm to reduce snow and wind coverage on the condenser. Reduce the indoor fan speed by 150 rpm. Check TL every 3 seconds and continuously monitor SL. If SLn = 0 and then SLn+1 = 0, it is considered effective (n ≤ 30) and should be maintained. Otherwise, reduce the indoor fan speed by 100 rpm, activate the electric auxiliary heating, re-record the current TL as TLO, re-record SL1, and so on. If SLn = 0 and then SLn+1 = 0, it is considered effective (n ≤ 30) and should be maintained. When the remaining power of the photovoltaic system is insufficient to sustain the current air conditioning power consumption for 12 hours, turn off the electric auxiliary heating (manually turn it on via remote control). When the AC power grid fails and power cannot be supplied, permanently turn off the electric auxiliary heating (manually turn it on three times to respond).

[0074] When the outer ring temperature is above 0 degrees Celsius, the situation needs to be handled differently. Theoretically, as long as the refrigerant evaporation temperature in the condenser is kept above zero degrees Celsius, the condensate will flow out through the gaps between the fins. Conversely, if the condenser temperature drops below zero degrees Celsius, it will cause the condenser to frost rapidly. Especially in low-temperature and high-humidity environments, such as winters in some regions, the air conditioner will typically enter defrosting mode within 30-60 minutes. Therefore, it is important to maintain the condenser temperature as much as possible. Here, comfort and energy efficiency are prioritized. Let the outer ring temperature be denoted as Tring and the condenser refrigerant evaporator temperature as TL.

[0075] When 3℃ < T_ring, increase the outdoor fan speed by 100 rpm. Since the T_ring temperature is greater than 3℃, enhanced external heat exchange can effectively increase the TL temperature. TL is checked every 5 seconds, sequentially designated TL0, TL1, ..., and so on. TL1-TL0 is recorded as SL1, TL2-TL1 as SL2, and so on. When SLn > 0 and SLn+1 ≥ 0, it is considered effective (n ≤ 60) and maintained. Otherwise, increase the outdoor fan speed by 200 rpm, re-record the current TL as TLO, and re-record SL1, and so on. When SLn > 0 and SLn+1 ≥ 0, it is considered effective (n ≤ 60) and maintained. Otherwise, decrease the indoor fan speed by 100 rpm. Re-record the current TL as TLO, and re-record SL1, and so on. When SLn > 0 and SLn+1 ≥ 0, it is considered effective (n ≤ 60) and maintained until defrosting begins.

[0076] When 3℃ ≤ T_loop, increase the outdoor fan speed by 200 rpm. This enhanced external heat exchange effectively raises the TL temperature. TL is checked every 3 seconds, sequentially designated TL0, TL1, and so on. TL1-TL0 is denoted as SL1, TL2-TL1 as SL2, and so on. If SLn > 0 and SLn+1 ≥ 0, the condition is considered effective (n ≤ 30) and maintained. Otherwise, increase the outdoor fan speed by 300 rpm, re-record the current TL as TLO, and re-record SL1, and so on. If SLn > 0 and SLn+1 ≥ 0, the condition is considered effective (n ≤ 30) and maintained. Otherwise, decrease the indoor fan speed by 150 rpm and reduce the compressor frequency by 5 Hz. Re-record the current TL as TLO and re-record SL1, and so on. If SLn > 0 and SLn+1 ≥ 0, the condition is considered effective (n ≤ 30) and maintained until defrosting begins.

[0077] It should be noted that once the photovoltaic system's batteries are fully charged, the electric auxiliary heater is activated first to consume excess photovoltaic power, increasing the indoor unit's speed by 100 RPM. This logic takes precedence over all the aforementioned actions to enhance the local absorption capacity of the photovoltaic power generation module.

[0078] The technical solutions provided by the embodiments of this invention improve the heating effect of air conditioning by optimizing photovoltaic energy scheduling and management and developing air conditioning operation strategies based on reversing the ice crystal formation process. This achieves continuous heating or defrosting with fewer or no downtime, improving energy efficiency and comfort. It also maintains the continuity and reliability of photovoltaic air conditioning heating under severe weather conditions, optimizing photovoltaic energy utilization efficiency and local photovoltaic consumption. In other words, the new heating operation strategy and photovoltaic energy scheduling management improve the heating capacity of photovoltaic air conditioning under normal weather conditions, enhance its reliability under severe weather conditions, improve the continuity of photovoltaic air conditioning heating, and optimize photovoltaic energy utilization efficiency and local photovoltaic consumption.

[0079] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0080] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0081] According to embodiments of the present invention, a control device for a photovoltaic air conditioner for implementing the above-described control method for a photovoltaic air conditioner is also provided. Figure 4 This is a schematic diagram of the control device for a photovoltaic air conditioner according to an embodiment of the present invention, such as... Figure 4 As shown, the control device of the photovoltaic air conditioner includes: a first acquisition unit 41, a first control unit 43, a second acquisition unit 45, a second control unit 47, and a third control unit 49. The control device of the photovoltaic air conditioner will be described below.

[0082] The first acquisition unit 41 is used to acquire the outdoor ambient temperature of the photovoltaic air conditioner when the photovoltaic air conditioner is turned on and running in heating mode.

[0083] The first control unit 43 is configured to increase the current speed of the outdoor fan of the air conditioner by a first predetermined speed value when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold.

[0084] The second acquisition unit 45 is used to acquire the current evaporation temperature on the outdoor evaporation side when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output.

[0085] The second control unit 47 is used to control the indoor fan and outdoor fan of the photovoltaic air conditioner to reduce the second predetermined speed value respectively when it is determined that the current evaporation temperature is greater than the evaporation temperature threshold.

[0086] The third control unit 49 is used to collect multiple first evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and adjust the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner according to the first evaporation temperature difference between each two adjacent first evaporation temperature values, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0087] It should be noted that the first acquisition unit 41, the first control unit 43, the second acquisition unit 45, the second control unit 47, and the third control unit 49 mentioned above correspond to steps S202 to S210 in the above embodiments. The five units and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments.

[0088] As can be seen from the above, in the solution described in the above embodiments of the present invention, the first acquisition unit can acquire the outdoor ambient temperature of the photovoltaic air conditioner when the photovoltaic air conditioner is turned on and running in heating mode; then, when the first control unit determines that the outdoor ambient temperature is greater than a first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, it controls the current speed of the air conditioner's outdoor fan to increase by a first predetermined speed value, so as to increase the outdoor evaporator side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporator side, wherein the first temperature threshold is less than the second temperature threshold; then, when the second acquisition unit determines that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output, it acquires the current evaporation temperature of the outdoor evaporator side; then, when the second control unit determines that the current evaporation temperature is less than the first temperature threshold, it acquires the current evaporation temperature of the outdoor evaporator side; and then, when the second control unit determines that the current evaporation temperature is less than the first temperature threshold, it acquires the current evaporation temperature of the outdoor evaporator side. When the evaporation temperature threshold is reached, the indoor and outdoor fans of the photovoltaic air conditioner are controlled to reduce their second predetermined speed values ​​respectively; and multiple first evaporation temperature values ​​of the outdoor evaporation side are collected by the third control unit according to a predetermined cycle, and the operating status of the electric heating module and / or compressor of the photovoltaic air conditioner is adjusted according to the first evaporation temperature difference between each two adjacent first evaporation temperature values, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side. This achieves the purpose of determining the operating status of the indoor and outdoor fans, compressor and electric heating module of the photovoltaic air conditioner according to the outdoor ambient temperature, weather conditions and outdoor evaporation side temperature, so that the operating status of the photovoltaic air conditioner can reduce the frosting rate of the outdoor evaporation side, thereby reducing the frequency of the air conditioner entering the defrosting stage and improving the operating stability of the photovoltaic air conditioner.

[0089] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that when an air conditioner is in the reverse cycle of heat circulation, the indoor temperature will drop due to the heating of the condenser to defrost, and water vapor will be blown out when the room is heated again, and frequent defrosting will affect the heating comfort.

[0090] Optionally, the control device of the photovoltaic air conditioner further includes: a first acquisition unit, used to acquire multiple second evaporation temperature values ​​of the outdoor evaporation side according to a predetermined cycle; a first determination unit, used to determine a second evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple second evaporation temperature values; a third control unit, used to control the outdoor fan to run at the current speed for a first predetermined time period when the second evaporation temperature difference value is greater than the evaporation temperature difference threshold; and a fourth control unit, used to continue to control the current speed of the outdoor fan to increase by a third predetermined speed value when the second evaporation temperature difference value is not greater than the evaporation temperature difference threshold, so as to increase the temperature of the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0091] Optionally, the control device of the photovoltaic air conditioner further includes: a second acquisition unit, used to acquire multiple third evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle after increasing the current speed of the outdoor fan by a third predetermined speed value; a second determination unit, used to determine the third evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple third evaporation temperature values; a fifth control unit, used to control the outdoor fan to operate at the current speed for a second predetermined time period when the third evaporation temperature difference value is greater than the evaporation temperature difference threshold; and a sixth control unit, used to control the speed of the indoor fan to decrease by a fourth predetermined speed value when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0092] Optionally, the control device of the photovoltaic air conditioner further includes: a seventh control unit, used to control the current speed of the outdoor fan to increase by a fifth predetermined speed value when the outdoor ambient temperature is determined to be no greater than a second temperature threshold; a third acquisition unit, used to acquire multiple fourth evaporation temperature values ​​on the outdoor evaporator side according to a predetermined cycle after the outdoor fan increases by the fifth predetermined speed value; a third determination unit, used to determine the fourth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fourth evaporation temperature values; and an eighth control unit, used to continue to control the current speed of the indoor fan to decrease by a sixth predetermined speed value and control the frequency of the compressor to decrease by a first predetermined frequency value when the fourth evaporation temperature difference value is no greater than the evaporation temperature difference threshold.

[0093] Optionally, the third control unit includes: a first control module, configured to, when determining that the first evaporation temperature difference is not a predetermined temperature difference threshold, control the current speed of the internal fan to decrease by a seventh predetermined speed value and control the frequency of the compressor to decrease by a second predetermined frequency value; a first acquisition module, configured to acquire multiple fifth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determine the fifth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fifth evaporation temperature values; and a second control module, configured to, when the fifth evaporation temperature difference is not a predetermined temperature difference threshold, control the electric heating module to turn on.

[0094] Optionally, the control device of the photovoltaic air conditioner further includes: a third control module, used to control the electric heating module to shut down if the reversal of the defrosting four-way valve of the photovoltaic air conditioner is detected during the start-up process of the electric heating module.

[0095] Optionally, the control device of the photovoltaic air conditioner further includes: a ninth control unit, used to control the current speed of the outdoor fan to decrease by an eighth speed value when it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold; a fourth acquisition unit, used to acquire multiple sixth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determine the sixth evaporation temperature difference value between each two adjacent sixth evaporation temperature values; and a tenth control unit, used to control the speed of the indoor fan to continue to decrease by a ninth speed value when it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold, and simultaneously control the electric heating module to turn on.

[0096] Optionally, the control device of the photovoltaic air conditioner further includes: an eleventh control unit, configured to, if the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, and when it is determined that the outdoor ambient temperature is not greater than the third temperature threshold, control the current speed of the outdoor fan to increase by a tenth speed value, and collect multiple seventh evaporation temperature values ​​on the outdoor evaporation side according to a predetermined period, and determine the seventh evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple seventh evaporation temperature values; and a twelfth control unit, configured to, when the seventh evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continue to control the current speed of the outdoor fan to increase by an eleventh speed value, and collect multiple eighth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined period, and determine the eighth evaporation temperature difference value between each two adjacent evaporation temperature values ​​among the multiple eighth evaporation temperature values;

[0097] The thirteenth control unit is used to control the electric heating module to turn on and control the current speed of the internal fan to increase by the twelfth speed value when the eighth evaporation temperature difference value is not greater than the evaporation temperature difference threshold.

[0098] According to another aspect of the present invention, a photovoltaic air conditioner is also provided, wherein the photovoltaic air conditioner uses the control method of any of the above-described photovoltaic air conditioners.

[0099] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method of the photovoltaic air conditioner described in any of the above.

[0100] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0101] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the photovoltaic air conditioner is turned on and running in heating mode, acquiring the outdoor ambient temperature of the photovoltaic air conditioner; when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and a second temperature threshold, controlling the current speed of the outdoor fan of the air conditioner to increase by a first predetermined speed value, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side, wherein the first temperature threshold is less than the second temperature threshold; when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has no power output, acquiring the current evaporation temperature of the outdoor evaporation side; when it is determined that the current evaporation temperature is greater than the evaporation temperature threshold, controlling the indoor fan and the outdoor fan of the photovoltaic air conditioner to decrease by a second predetermined speed value respectively; collecting multiple first evaporation temperature values ​​of the outdoor evaporation side according to a predetermined period, and adjusting the operating state of the electric heating module and / or compressor of the photovoltaic air conditioner according to the first evaporation temperature difference value between every two adjacent evaporation temperature values, so as to increase the outdoor evaporation side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporation side.

[0102] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: collecting multiple second evaporation temperature values ​​on the outdoor evaporation side at a predetermined period; determining a second evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple second evaporation temperature values; when the second evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to run at the current speed for a first predetermined duration; when the second evaporation temperature difference value is not greater than the evaporation temperature difference threshold, continuing to control the current speed of the outdoor fan to increase by a third predetermined speed value, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0103] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: collecting multiple third evaporation temperature values ​​on the outdoor evaporation side at a predetermined period; determining a third evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple third evaporation temperature values; when the third evaporation temperature difference value is greater than an evaporation temperature difference threshold, controlling the outdoor fan to run at the current speed for a second predetermined period of time; when the third evaporation temperature difference value is not greater than the evaporation temperature difference threshold, controlling the speed of the indoor fan to decrease by a fourth predetermined speed value, so as to increase the temperature on the outdoor evaporation side of the photovoltaic air conditioner and reduce the frosting rate on the outdoor evaporation side.

[0104] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the outdoor ambient temperature is determined to be no greater than a second temperature threshold, controlling the current speed of the outdoor fan to increase by a fifth predetermined speed value; after the outdoor fan increases by the fifth predetermined speed value, collecting multiple fourth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle; determining the fourth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fourth evaporation temperature values; when the fourth evaporation temperature difference value is no greater than the evaporation temperature difference threshold, continuing to control the current speed of the indoor fan to decrease by a sixth predetermined speed value, and controlling the frequency of the compressor to decrease by a first predetermined frequency value.

[0105] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the first evaporation temperature difference is not a predetermined temperature difference threshold, controlling the current speed of the internal fan to decrease by a seventh predetermined speed value, and controlling the frequency of the compressor to decrease by a second predetermined frequency value; collecting multiple fifth evaporation temperature values ​​on the outdoor evaporation side according to a predetermined cycle, and determining the fifth evaporation temperature difference value between every two adjacent evaporation temperature values ​​among the multiple fifth evaporation temperature values; when the fifth evaporation temperature difference is not a predetermined temperature difference threshold, controlling the electric heating module to turn on.

[0106] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: during the start-up process of the electric heating module, if the reversal of the defrosting four-way valve of the photovoltaic air conditioner is detected, the electric heating module is controlled to shut down.

[0107] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the current evaporation temperature is not greater than the evaporation temperature threshold, the current speed of the outdoor fan is controlled to decrease by an eighth speed value; multiple sixth evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined cycle, and the sixth evaporation temperature difference value between each two adjacent evaporation temperature values ​​is determined; when it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold, the speed of the indoor fan is controlled to continue to decrease by a ninth speed value, and the electric heating module is controlled to turn on.

[0108] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: if the power output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module has power output, when it is determined that the outdoor ambient temperature is not greater than the third temperature threshold, the current speed of the outdoor fan is controlled to increase by the tenth speed value, and multiple seventh evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined period, and the seventh evaporation temperature difference value of each two adjacent evaporation temperature values ​​is determined; when the seventh evaporation temperature difference value is not greater than the evaporation temperature difference threshold, the current speed of the outdoor fan is controlled to increase by the eleventh speed value, and multiple eighth evaporation temperature values ​​on the outdoor evaporation side are collected according to a predetermined period, and the eighth evaporation temperature difference value of each two adjacent evaporation temperature values ​​is determined; when the eighth evaporation temperature difference value is not greater than the evaporation temperature difference threshold, the electric heating module is controlled to turn on, and the current speed of the indoor fan is controlled to increase by the twelfth speed value.

[0109] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the control method of the photovoltaic air conditioner described above.

[0110] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0111] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0112] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0113] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0114] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0115] If the integrated unit is implemented as 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 prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0116] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method of a photovoltaic air conditioner, characterized by, Comprise: In the case of the photovoltaic air conditioner running in the heating mode, the outdoor environment temperature of the photovoltaic air conditioner is obtained; When it is determined that the outdoor environment temperature is greater than a first temperature threshold and the outdoor environment temperature is greater than a second temperature threshold, the current rotating speed of the outdoor fan of the air conditioner is increased by a first predetermined rotating speed value, so that the outdoor evaporative side temperature of the photovoltaic air conditioner is increased, and the frosting rate of the outdoor evaporative side is reduced, wherein the first temperature threshold is less than the second temperature threshold; When it is determined that the outdoor environment temperature is not greater than the first temperature threshold and the electric energy output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module does not have electric energy output, the current evaporative temperature of the outdoor evaporative side is obtained; When it is determined that the current evaporative temperature is greater than an evaporative temperature threshold, the rotating speed of the indoor fan and the outdoor fan of the photovoltaic air conditioner is respectively reduced by a second predetermined rotating speed value; According to a predetermined period, a plurality of first evaporative temperature values of the outdoor evaporative side are collected, and the operating state of the electric heating module and / or the compressor of the photovoltaic air conditioner is adjusted according to the first evaporative temperature difference value of each adjacent two evaporative temperature values in the plurality of first evaporative temperature values, so that the outdoor evaporative side temperature of the photovoltaic air conditioner is increased, and the frosting rate of the outdoor evaporative side is reduced.

2. The control method of a photovoltaic air conditioner according to claim 1, wherein After the current rotating speed of the outdoor fan of the photovoltaic air conditioner is increased by a first predetermined rotating speed value, further comprising: According to the predetermined period, a plurality of second evaporative temperature values of the outdoor evaporative side are collected; The second evaporative temperature difference value of each adjacent two evaporative temperature values in the plurality of second evaporative temperature values is determined; When the second evaporative temperature difference value is greater than an evaporative temperature difference threshold, the outdoor fan is controlled to operate at the current rotating speed for a first predetermined time length; When the second evaporative temperature difference value is not greater than the evaporative temperature difference threshold, the current rotating speed of the outdoor fan is further increased by a third predetermined rotating speed value, so that the outdoor evaporative side temperature of the photovoltaic air conditioner is increased, and the frosting rate of the outdoor evaporative side is reduced.

3. The control method of a photovoltaic air conditioner according to claim 2, wherein After the current rotating speed of the outdoor fan is increased by a third predetermined rotating speed value, further comprising: According to the predetermined period, a plurality of third evaporative temperature values of the outdoor evaporative side are collected; The third evaporative temperature difference value of each adjacent two evaporative temperature values in the plurality of third evaporative temperature values is determined; When the third evaporative temperature difference value is greater than an evaporative temperature difference threshold, the outdoor fan is controlled to operate at the current rotating speed for a second predetermined time length; When the third evaporative temperature difference value is not greater than the evaporative temperature difference threshold, the rotating speed of the indoor fan is reduced by a fourth predetermined rotating speed value, so that the outdoor evaporative side temperature of the photovoltaic air conditioner is increased, and the frosting rate of the outdoor evaporative side is reduced.

4. The control method of a photovoltaic air conditioner according to claim 1, wherein Further comprising: When it is determined that the outdoor environment temperature is not greater than the second temperature threshold, the current rotating speed of the outdoor fan is increased by a fifth predetermined rotating speed value; After the outdoor fan increases the fifth predetermined rotating speed value, a plurality of fourth evaporative temperature values of the outdoor evaporative side are collected according to the predetermined period; The fourth evaporative temperature difference value of each adjacent two evaporative temperature values in the plurality of fourth evaporative temperature values is determined; When the fourth evaporation temperature difference value is not greater than an evaporation temperature difference threshold value, the current rotating speed of the inner fan is controlled to decrease by a sixth predetermined rotating speed value, and the frequency of the compressor is controlled to decrease by a first predetermined frequency value.

5. The control method of a photovoltaic air conditioner according to claim 1, wherein According to the predetermined period, a plurality of first evaporation temperature values of the outdoor evaporation side are collected, and a running state of an electric heating module and / or a compressor of the photovoltaic air conditioner is adjusted according to a first evaporation temperature difference value of each adjacent two evaporation temperature values in the plurality of first evaporation temperature values, including: When it is determined that the first evaporation temperature difference value is not a predetermined temperature difference threshold value, the current rotating speed of the inner fan is controlled to decrease by a seventh predetermined rotating speed value, and the frequency of the compressor is controlled to decrease by a second predetermined frequency value; According to the predetermined period, a plurality of fifth evaporation temperature values of the outdoor evaporation side are collected, and a fifth evaporation temperature difference value of each adjacent two evaporation temperature values in the plurality of fifth evaporation temperature values is determined; When the fifth evaporation temperature difference value is not the predetermined temperature difference threshold value, the electric heating module is controlled to be turned on.

6. The control method of a photovoltaic air conditioner according to claim 5, wherein Further comprising: During the process that the electric heating module is turned on, if it is detected that the defrosting four-way valve of the photovoltaic air conditioner is reversed, the electric heating module is controlled to be turned off.

7. The control method of a photovoltaic air conditioner according to claim 1, wherein Further comprising: When it is determined that the current evaporation temperature is not greater than an evaporation temperature threshold value, the current rotating speed of the outer fan is controlled to decrease by an eighth rotating speed value; According to the predetermined period, a plurality of sixth evaporation temperature values of the outdoor evaporation side are collected, and a sixth evaporation temperature difference value of each adjacent two evaporation temperature values in the plurality of sixth evaporation temperature values is determined; When it is determined that the sixth evaporation temperature value is not a predetermined temperature difference threshold value, the rotating speed of the inner fan is controlled to continue to decrease by a ninth rotating speed value, and the electric heating module is controlled to be turned on.

8. The control method of a photovoltaic air conditioner according to claim 1, wherein, Further comprising: When it is determined that the outdoor environment temperature is not greater than a third temperature threshold value, the current rotating speed of the outer fan is controlled to increase by a tenth rotating speed value, according to the predetermined period, a plurality of seventh evaporation temperature values of the outdoor evaporation side are collected, and a seventh evaporation temperature difference value of each adjacent two evaporation temperature values in the plurality of seventh evaporation temperature values is determined, if the electric energy output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module exists electric energy output; When the seventh evaporation temperature difference value is not greater than an evaporation temperature difference threshold value, the current rotating speed of the outer fan is controlled to continue to increase by an eleventh rotating speed value, according to the predetermined period, a plurality of eighth evaporation temperature values of the outdoor evaporation side are collected, and an eighth evaporation temperature difference value of each adjacent two evaporation temperature values in the plurality of eighth evaporation temperature values is determined; When the eighth evaporation temperature difference value is not greater than an evaporation temperature difference threshold value, the electric heating module is controlled to be turned on, and the current rotating speed of the inner fan is controlled to increase by a twelfth rotating speed value.

9. A control device for a photovoltaic air conditioner, characterized by, Comprising: a first acquisition unit, configured to, in a case that a photovoltaic air conditioner is started and runs in a heating mode, acquire an outdoor environment temperature of the photovoltaic air conditioner; The first control unit is configured to control the current rotating speed of the outdoor fan of the air conditioner to increase by a first predetermined rotating speed value when it is determined that the outdoor ambient temperature is greater than a first temperature threshold and the outdoor ambient temperature is greater than a second temperature threshold, so as to increase the outdoor evaporating side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporating side, wherein the first temperature threshold is less than the second temperature threshold. The second acquisition unit is configured to acquire a current evaporating temperature of the outdoor evaporating side when it is determined that the outdoor ambient temperature is not greater than the first temperature threshold and the electric energy output information of the photovoltaic power generation module of the photovoltaic air conditioner indicates that the photovoltaic power generation module does not have electric energy output. The second control unit is configured to control the indoor fan and the outdoor fan of the photovoltaic air conditioner to respectively decrease by a second predetermined rotating speed value when it is determined that the current evaporating temperature is greater than an evaporating temperature threshold. The third control unit is configured to collect a plurality of first evaporating temperature values of the outdoor evaporating side according to a predetermined period, and adjust the operating state of the electric heating module and / or the compressor of the photovoltaic air conditioner according to a first evaporating temperature difference value of each adjacent two evaporating temperature values in the plurality of first evaporating temperature values, so as to increase the outdoor evaporating side temperature of the photovoltaic air conditioner and reduce the frosting rate of the outdoor evaporating side.

10. A photovoltaic air conditioner, characterized by, The photovoltaic air conditioner uses the control method of the photovoltaic air conditioner according to any one of claims 1 to 8.

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