Control method and control device of air conditioner, and air conditioner

Abstract

This invention relates to the field of air conditioner technology, and discloses a control method, control device, and air conditioner. The control method includes determining the actual outdoor temperature of the outdoor heat exchanger; when the actual outdoor temperature reaches a warning temperature threshold, controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse, thereby increasing the outlet temperature of the refrigerant in the indoor heat exchanger. Obtaining the actual outdoor temperature not only provides a real-time and accurate data basis for subsequent anti-frost warning control, but also avoids the drawbacks of frequent ineffective defrosting or defrosting only after severe frost buildup due to temperature misjudgment; subsequently, when the actual outdoor temperature reaches the warning temperature threshold, by activating the indoor auxiliary heater and simultaneously controlling the indoor fan to reverse, the outlet temperature of the refrigerant in the indoor heat exchanger can be increased, thereby increasing the refrigerant temperature of the outdoor heat exchanger. This allows for continuous indoor heating while mitigating the degree of frost buildup on the outdoor heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method, control device, and air conditioner. Background Technology

[0002] A photovoltaic (PV) air conditioner is an air conditioning system that uses solar energy as its primary or auxiliary energy source. Simply put, it integrates photovoltaic power generation technology into a traditional air conditioner, allowing the air conditioner to directly use electricity generated by solar panels. PV air conditioners are mainly divided into two categories. The first type is DC-driven PV air conditioners, where the DC power generated by the photovoltaic system directly drives the air conditioner's DC compressor. The second type is AC-driven PV air conditioners, where the DC power generated by the photovoltaic system needs to be converted to AC power by an inverter before being used by a regular AC compressor.

[0003] Both traditional and photovoltaic (PV) air conditioners typically employ two defrosting methods: reverse defrosting and hot gas bypass defrosting. Reverse defrosting involves temporarily switching the air conditioner to cooling mode. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor first enters the outdoor heat exchanger to defrost it. The refrigerant discharged from the outdoor heat exchanger passes through the electronic expansion valve and the indoor heat exchanger before returning to the compressor. Obviously, this defrosting method prevents the indoor unit from providing heat to the room. Hot gas bypass defrosting defrosts by adding a defrost bypass to defrost the outdoor heat exchanger. Specifically, the compressor discharges high-temperature, high-pressure gaseous refrigerant, the bypass solenoid valve opens, and a portion of the high-temperature gaseous refrigerant bypasses the indoor unit and is directly injected into the inlet of the outdoor heat exchanger through the defrost bypass, defrosting the outdoor heat exchanger. The remaining portion of the high-temperature gaseous refrigerant still enters the indoor unit for normal heating circulation, ensuring normal heating. However, this defrosting method requires the compressor to maintain high-frequency operation, and the PV system needs to output maximum power for an extended period. Summary of the Invention

[0004] This invention provides a control method, control device, and air conditioner for an air conditioner. By activating the indoor auxiliary heater and simultaneously controlling the indoor fan to reverse, the outlet temperature of the refrigerant in the indoor heat exchanger can be increased, thereby increasing the refrigerant temperature in the outdoor heat exchanger. This can achieve the goal of ensuring continuous heating indoors while alleviating the degree of frosting on the outdoor heat exchanger.

[0005] The first aspect of this invention provides a control method for an air conditioner, comprising: Determine the actual outdoor temperature of the outdoor heat exchanger; When the actual outdoor temperature reaches the warning temperature threshold, the indoor auxiliary heater is turned on and the indoor fan is reversed to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

[0006] According to the control method for an air conditioner provided by the present invention, after the steps of "controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse," the method further includes: Within a preset time period, and when the actual temperature of the indoor auxiliary heater reaches the target temperature, the electronic expansion valve is controlled to maintain its current opening. Within a preset time period, and if the actual temperature of the indoor auxiliary heater does not reach the target temperature, the opening degree of the electronic expansion valve is controlled.

[0007] According to the control method for an air conditioner provided by the present invention, the step of "controlling the opening degree of the electronic expansion valve" includes: If the opening degree of the electronic expansion valve does not reach the minimum opening degree threshold, the opening degree of the electronic expansion valve is controlled to decrease. When the opening degree of the electronic expansion valve reaches the minimum opening degree threshold, the electronic expansion valve is controlled to maintain the minimum opening degree threshold.

[0008] According to the control method for an air conditioner provided by the present invention, after the steps of "controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse," the method further includes: Obtain the indoor temperature at the air outlet of the indoor fan; The speed of the indoor fan is adjusted according to the temperature difference between the indoor temperature and the set temperature.

[0009] According to the control method for an air conditioner provided by the present invention, the step of "adjusting the speed of the indoor fan based on the temperature difference between the indoor temperature and the set temperature" includes: The absolute value of the difference between the indoor temperature and the set temperature is taken as the temperature difference value; If the temperature difference is lower than the difference threshold, the speed of the indoor fan is reduced according to a preset step size.

[0010] According to the control method of the air conditioner provided by the present invention, wherein the air conditioner is a photovoltaic air conditioner, the method further includes, before the step of "controlling the indoor auxiliary heater to turn on": Obtain the real-time maximum power generation of the photovoltaic system; If the real-time maximum power generation is greater than the starting power of the indoor auxiliary heater, the photovoltaic system is controlled to supply power to the indoor auxiliary heater so that the indoor auxiliary heater can be started.

[0011] A second aspect of the present invention provides a control device for an air conditioner, comprising: The determination unit is used to determine the actual outdoor temperature of the outdoor heat exchanger. The control unit is used to control the indoor auxiliary heater to turn on and the indoor fan to reverse when the actual outdoor temperature reaches the warning temperature threshold, so as to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

[0012] A third aspect of the present invention provides an air conditioner, comprising: Outdoor unit and indoor unit; The control device of the aforementioned air conditioner is electrically connected to the indoor unit and the outdoor unit.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method of the air conditioner as described in any of the preceding claims.

[0014] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the control method of the air conditioner as described in any of the preceding claims.

[0015] The air conditioner control method provided by this invention can determine whether the outdoor heat exchanger has reached the frosting critical temperature point based on the actual outdoor temperature, thus providing data reference for subsequent control. Next, when the actual outdoor temperature reaches the warning temperature threshold, the indoor auxiliary heater is activated, and the indoor fan is reversed. The reversed indoor fan blows the heat generated by the indoor auxiliary heater onto the indoor heat exchanger, thereby increasing the refrigerant outlet temperature of the indoor heat exchanger and consequently increasing the refrigerant temperature of the outdoor heat exchanger. This allows for continuous indoor heating while slowing the rate of decrease in the actual outdoor temperature, thus delaying the frosting process on the outdoor heat exchanger. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the control method for an air conditioner provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the air conditioner control device provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] In the description of this specification, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing this specification. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this specification, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention based on the specific circumstances.

[0023] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] In the embodiments of this specification, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0026] The following is combined Figure 1 This invention describes a control method for an air conditioner. Before providing a detailed description of the embodiments of the invention, the executing entity of the control method for the air conditioner according to the embodiments of the invention will be described first. The executing entity of the control method for the air conditioner according to the embodiments of the invention can be an air conditioner control device, a cloud platform in the Internet field, or other types of cloud platforms in the Internet field, or it can be applied to a third-party device. The third-party device may include various types such as mobile phones, tablet computers, laptops, in-vehicle computers, and other smart terminals.

[0027] The control method of the air conditioner of the present invention will be described below using the control device (hereinafter referred to as the control device) with the air conditioner as the execution subject as an example.

[0028] like Figure 1 As shown, a specific embodiment of the first aspect of the present invention provides a method for controlling an air conditioner. The method includes: S100. Determine the actual outdoor temperature of the outdoor heat exchanger. Specifically, the outdoor temperature sensor is used to detect the actual outdoor temperature of the outer surface of the outdoor heat exchanger in real time. The control device is electrically connected to the outdoor temperature sensor and obtains the actual outdoor temperature of the outdoor heat exchanger from the sensor. The actual outdoor temperature can determine whether the outdoor heat exchanger has reached the critical temperature point for frost formation. This not only provides a real-time and accurate data basis for subsequent anti-frost warning control, but also avoids the drawbacks of frequent ineffective defrosting (false defrosting) or defrosting only after severe frost formation due to temperature misjudgment, thereby ensuring the continuity of air conditioning system operation and high heating efficiency.

[0029] S200: When the actual outdoor temperature reaches the warning temperature threshold, the indoor auxiliary heater is turned on, and the indoor fan is reversed to increase the refrigerant outlet temperature of the indoor heat exchanger. Specifically, the control device compares the actual outdoor temperature with the preset warning temperature threshold; when the actual outdoor temperature reaches the warning temperature threshold, the control device turns on the indoor auxiliary heater and reverses the indoor fan. The reversed indoor fan blows the heat generated by the indoor auxiliary heater onto the indoor heat exchanger, thereby increasing the refrigerant outlet temperature of the indoor heat exchanger and consequently increasing the refrigerant temperature of the outdoor heat exchanger. This allows for continuous heating indoors while slowing down the rate of decrease in the actual outdoor temperature, delaying the frosting of the outdoor heat exchanger. This design avoids the problem of traditional reverse defrosting requiring switching of the four-way valve, causing the indoor unit to stop heating and blow cold air, and also eliminates the need for complex defrosting piping and prolonged high-frequency compressor operation as required by hot air bypass defrosting. By coordinating the indoor auxiliary heater and the fan reversal, the frost formation trend of the outdoor heat exchanger is suppressed without stopping the machine or disrupting the indoor thermal environment, thus extending the continuous and effective heating time of the air conditioner and improving the user's winter heating comfort.

[0030] Optionally, the indoor auxiliary heater is a PTC heater.

[0031] It should be noted that the warning temperature threshold is not less than the critical frosting temperature of the outdoor heat exchanger. The critical frosting temperature is the temperature at which frost begins to form on the outdoor heat exchanger.

[0032] It should be noted that, in the embodiments of the present invention, once the actual outdoor temperature reaches the warning temperature threshold, the four-way valve of the air conditioner remains in the heating mode, and the four-way valve does not need to switch from the heating mode to the cooling mode. When the four-way valve is in the heating mode, the refrigerant discharged from the compressor passes sequentially through the four-way valve, the indoor heat exchanger, the electronic expansion valve, the outdoor heat exchanger, and the four-way valve before returning to the compressor. When the four-way valve is in the cooling mode, the refrigerant discharged from the compressor passes sequentially through the four-way valve, the outdoor heat exchanger, the electronic expansion valve, the indoor heat exchanger, and the four-way valve before returning to the compressor.

[0033] In some embodiments of the present invention, after the steps of "controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse," the method further includes: Within a preset time, and when the actual temperature of the indoor auxiliary heater reaches the target temperature, the electronic expansion valve is controlled to maintain its current opening. By maintaining the current opening of the electronic expansion valve, the refrigerant circulation flow in the system can be kept stable when the indoor auxiliary heater can provide sufficient heat, thereby maintaining stable indoor heating and outdoor anti-frost effects and avoiding system operation fluctuations caused by frequent adjustments to the electronic expansion valve.

[0034] If the actual temperature of the indoor auxiliary heater does not reach the target temperature within a preset time, the opening of the electronic expansion valve is adjusted. By adjusting the opening of the electronic expansion valve, the circulation flow of the refrigerant in the system can be reduced when the indoor auxiliary heater is not generating enough heat. This helps to further increase the outlet temperature of the refrigerant in the indoor heat exchanger, ensuring that the refrigerant temperature of the outdoor heat exchanger can still be increased when the auxiliary heating effect is poor, thereby delaying the degree of frosting on the outdoor heat exchanger.

[0035] Specifically, after the indoor auxiliary heater and fan are turned on, the control device starts timing. When the preset time is reached, the control device compares the actual temperature of the indoor auxiliary heater with the target temperature. If the actual temperature of the indoor auxiliary heater reaches the target temperature, the control device controls the electronic expansion valve to maintain its current opening. If the actual temperature of the indoor auxiliary heater does not reach the target temperature, the control device controls the electronic expansion valve to reduce its opening.

[0036] In some embodiments of the present invention, the step of "controlling the opening degree of the electronic expansion valve" includes: If the opening of the electronic expansion valve does not reach the minimum opening threshold, the opening of the electronic expansion valve is reduced. By further reducing the opening of the electronic expansion valve, the circulation flow of the refrigerant in the system can be reduced, causing the outlet temperature of the refrigerant in the indoor heat exchanger to rise continuously. This compensates for the insufficient heating of the indoor auxiliary heater and ensures that the refrigerant temperature of the outdoor heat exchanger can be continuously increased to delay frost formation.

[0037] When the opening degree of the electronic expansion valve reaches the minimum opening threshold, the electronic expansion valve is controlled to maintain the minimum opening threshold. By maintaining this minimum opening threshold, the abnormal refrigerant circulation or insufficient compressor return caused by the electronic expansion valve opening being too small or even completely closed can be avoided. Thus, the anti-frost effect is maintained to the maximum extent while ensuring the safe and stable operation of the air conditioning system.

[0038] Specifically, within a preset time period, if the actual temperature of the indoor auxiliary heater has not reached the target temperature, the control device determines whether the opening degree of the electronic expansion valve has reached the minimum opening degree threshold; if not, the control device controls the opening degree of the electronic expansion valve to decrease; if so, the control device controls the electronic expansion valve to maintain the minimum opening degree threshold.

[0039] For example, after turning on the indoor auxiliary heater and controlling the indoor fan to reverse, if the actual temperature of the indoor auxiliary heater reaches the target temperature within a preset time, the electronic expansion valve is controlled to maintain its current opening. If the actual temperature of the auxiliary heater does not reach the target temperature within the preset time, the opening of the electronic expansion valve is controlled to decrease if it does not reach the minimum opening threshold, or it is maintained at the minimum opening threshold if it does. Through precise adjustment of the electronic expansion valve opening, the system refrigerant flow can be further optimized, ensuring that the refrigerant temperature can still be adjusted through flow control even when the auxiliary heating effect is poor, thus improving the adjustment stability of the system during the defrost warning stage. In addition, through graded adjustment of the electronic expansion valve opening, the system refrigerant flow can be intervened in a timely and dynamic manner when the indoor auxiliary heater does not reach the expected temperature (i.e., insufficient internal heat replenishment). This not only prevents the evaporation temperature from continuously decreasing due to excessive refrigerant flow, but also avoids the safety risk of compressor liquid slugging, improving the system's adaptability and operational reliability in the defrost warning stage under various extreme or complex operating conditions.

[0040] In some embodiments of the present invention, after the steps of "controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse," the method further includes: acquiring the indoor temperature at the outlet of the indoor fan. By acquiring the indoor temperature at the outlet of the indoor fan, the actual indoor ambient temperature and the actual heating status of the air conditioner can be accurately determined, thereby providing reliable data support for the subsequent precise adjustment of the indoor fan speed. The indoor fan speed is adjusted based on the temperature difference between the indoor temperature and the set temperature. By dynamically adjusting the indoor fan speed according to this temperature difference, it is possible to ensure that the reverse-rotating indoor fan blows heat from the auxiliary heater to the indoor heat exchanger to delay outdoor frost formation, while also considering the actual heating needs of the indoor environment and the comfort of the user, and avoiding the additional energy consumption and noise problems caused by the fan blindly running at a fixed speed.

[0041] Specifically, after the steps of "controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse", the control device obtains the indoor temperature at the air outlet of the indoor fan from the indoor temperature sensor. Then, the control device determines the temperature difference between the indoor temperature and the set temperature, and finally controls the fan speed based on the temperature difference.

[0042] It should be noted that the set temperature is the target heating temperature set by the user on the indoor unit. Once the indoor temperature reaches the set temperature, the compressor will stop running.

[0043] Furthermore, the step of "adjusting the indoor fan speed based on the temperature difference between the indoor temperature and the set temperature" includes: using the absolute value of the difference between the indoor temperature and the set temperature as the temperature difference value. By calculating the absolute value of the temperature difference, the deviation between the current actual indoor temperature and the user's set target can be intuitively and accurately quantified, providing a standardized basis for subsequent precise step-by-step adjustment of the fan speed. When the temperature difference is lower than the difference threshold, the indoor fan speed is reduced according to a preset step size. By gradually reducing the indoor fan speed when the temperature difference is small, the indoor temperature can be kept close to the set temperature, improving user comfort, while reducing the operating power of the indoor fan and reducing operating noise, achieving a more energy-efficient and quieter operation. At the same time, the step-by-step adjustment makes the speed change smoother, avoiding the impact of drastic speed fluctuations on the system's thermal balance.

[0044] For example, the control device acquires the indoor temperature at the air outlet of the indoor fan and calculates the absolute value of the difference between it and the set temperature. If the temperature difference is lower than the difference threshold, the speed of the indoor fan is reduced according to a preset step size, thus dynamically adjusting the indoor fan speed based on the temperature difference. This dynamic and smooth adjustment of the indoor fan speed based on the temperature difference can ensure that the indoor temperature meets the user's needs while avoiding unnecessary energy consumption caused by high-speed fan operation, achieving more flexible energy-saving control.

[0045] In some embodiments of the present invention, the air conditioner is a photovoltaic air conditioner, and before the step of "controlling the indoor auxiliary heater to turn on", the method further includes: Obtaining the real-time maximum power output of the photovoltaic system allows for an accurate understanding of the system's actual power generation capacity, providing reliable data support for subsequent rational energy allocation and determining whether the power supply requirements of the auxiliary heaters are met.

[0046] When the real-time maximum power generation exceeds the starting power of the indoor auxiliary heater, the photovoltaic system is controlled to supply power to the indoor auxiliary heater so that the indoor auxiliary heater can be started. By prioritizing the use of clean electricity generated by the photovoltaic system to drive the indoor auxiliary heater, the consumption of mains electricity can be reduced, the operating electricity cost of the air conditioner during the anti-frost control process can be reduced, the comprehensive utilization rate of photovoltaic energy can be improved, and a better energy-saving and environmental protection effect can be achieved.

[0047] Specifically, the control device obtains the current real-time maximum power output of the photovoltaic system from the maximum power point tracking (MPPT) device of the photovoltaic system. The control device compares the real-time maximum power output with the start-up power of the indoor auxiliary heater. If the real-time maximum power output is greater than the start-up power of the indoor auxiliary heater, the control device controls the photovoltaic system to supply power to the indoor auxiliary heater so that the indoor auxiliary heater can start.

[0048] Optionally, the remaining electricity from the photovoltaic system after powering the indoor auxiliary heater can be supplied to the air conditioner compressor.

[0049] Some content is described in detail in the air conditioner control method provided in the first aspect embodiment, and all content in the air conditioner control method is also applicable to the air conditioner control device provided in the second aspect embodiment. Therefore, to avoid repetition, the air conditioner control device provided in the second aspect embodiment is not described in detail. Similarly, the content in the above two aspects embodiments can be used to explain the content of all subsequent aspects embodiments, so repeated content will not be described in the following embodiments.

[0050] The control device for an air conditioner provided by the present invention is described below. The control device for an air conditioner described below can be referred to in correspondence with the control method for an air conditioner described above.

[0051] like Figure 2 As shown, a specific embodiment of the second aspect of the present invention provides a control device for an air conditioner, which includes a determining unit and a control unit. The determining unit is used to determine the actual outdoor temperature of the outdoor heat exchanger. The control unit is used to control the indoor auxiliary heater to turn on and control the indoor fan to reverse in order to increase the outlet temperature of the refrigerant in the indoor heat exchanger when the actual outdoor temperature reaches a warning temperature threshold.

[0052] In this embodiment, by determining the actual outdoor temperature obtained by the unit, real-time monitoring and accurate judgment can be achieved as to whether the outdoor heat exchanger has reached the critical temperature point for frost formation, thus providing a reliable triggering condition for subsequent anti-frost warning actions. By linking the heat generation of the auxiliary heater and the directional backflushing of the fan, the refrigerant temperature at the outlet of the indoor heat exchanger and the refrigerant temperature of the subsequent outdoor heat exchanger can be rapidly increased. In this way, without affecting the continuous indoor heating, the cooling rate of the outdoor heat exchanger can be reduced and its frost formation can be delayed, thereby improving the operational reliability and heating efficiency of the air conditioner in cold climates.

[0053] A specific embodiment of the third aspect of the present invention provides an air conditioner, which includes an outdoor unit, an indoor unit, and a control device for the air conditioner of any of the above embodiments; the control device is electrically connected to the indoor unit and the outdoor unit.

[0054] In this embodiment, by integrating the control device of the air conditioner described above, the air conditioner is enabled to automatically turn on the indoor auxiliary heater and control the indoor fan to reverse when the outdoor heat exchanger reaches the warning temperature, so as to delay the frosting degree of the outdoor heat exchanger while ensuring continuous heating indoors, and improve the overall heating performance and operation reliability of the air conditioner in low-temperature environments. By electrically connecting the controller to the outdoor unit and the indoor unit, it can be ensured that the control device can obtain the temperature data of the outdoor unit in real time and accurately, and can transmit control instructions to the execution components such as the auxiliary heater and the fan of the indoor unit quickly and stably, realizing the linkage and precise coordinated response between the indoor and outdoor unit components.

[0055] Figure 3 An example of the physical structure diagram of an electronic device is shown, as Figure 3 shown, the electronic device may include: a processor (processor) 810, a communication interface (Communications Interface) 820, a memory (memory) 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 complete mutual communication through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the air conditioner, and the method includes: S100, determining the actual outdoor temperature of the outdoor heat exchanger; S200, when the actual outdoor temperature reaches the warning temperature threshold, controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse to increase the outlet temperature of the refrigerant of the indoor heat exchanger.

[0056] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of a software functional unit and sold or used as an independent product, they 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 part of this 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 for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. And the foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0057] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer-readable storage medium, the computer program being executed by a processor, the computer being able to execute the control method of the air conditioner provided by the above methods, the method including: S100, determining the actual outdoor temperature of the outdoor heat exchanger; S200, when the actual outdoor temperature reaches a warning temperature threshold, controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse, so as to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

[0058] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it implements the control method for the air conditioner provided by the above methods. The method includes: S100, determining the actual outdoor temperature of the outdoor heat exchanger; S200, when the actual outdoor temperature reaches a warning temperature threshold, controlling the indoor auxiliary heater to turn on and controlling the indoor fan to reverse, so as to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

[0059] The device embodiments described above are merely illustrative. 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 network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0060] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, 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 can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, include: Determine the actual outdoor temperature of the outdoor heat exchanger; When the actual outdoor temperature reaches the warning temperature threshold, the indoor auxiliary heater is turned on and the indoor fan is reversed to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

2. The control method for an air conditioner according to claim 1, characterized in that, After the steps of "turning on the auxiliary heater in the control room and reversing the control room fan", the following is also included: Within a preset time period, and when the actual temperature of the indoor auxiliary heater reaches the target temperature, the electronic expansion valve is controlled to maintain its current opening. Within a preset time period, and if the actual temperature of the indoor auxiliary heater does not reach the target temperature, the opening degree of the electronic expansion valve is controlled.

3. The control method for an air conditioner according to claim 2, characterized in that, The step of "controlling the opening degree of the electronic expansion valve" includes: If the opening degree of the electronic expansion valve does not reach the minimum opening degree threshold, the opening degree of the electronic expansion valve is controlled to decrease. When the opening degree of the electronic expansion valve reaches the minimum opening degree threshold, the electronic expansion valve is controlled to maintain the minimum opening degree threshold.

4. The control method for an air conditioner according to claim 1, characterized in that, After the steps of "turning on the auxiliary heater in the control room and reversing the control room fan", the following is also included: Obtain the indoor temperature at the air outlet of the indoor fan; The speed of the indoor fan is adjusted according to the temperature difference between the indoor temperature and the set temperature.

5. The control method for an air conditioner according to claim 4, characterized in that, The step of "adjusting the speed of the indoor fan based on the temperature difference between the indoor temperature and the set temperature" includes: The absolute value of the difference between the indoor temperature and the set temperature is taken as the temperature difference value; If the temperature difference is lower than the difference threshold, the speed of the indoor fan is reduced according to a preset step size.

6. The control method for an air conditioner according to any one of claims 1 to 5, characterized in that, The air conditioner is a photovoltaic air conditioner, and before the step of "turning on the auxiliary heater in the control room", the following is also included: Obtain the real-time maximum power generation of the photovoltaic system; If the real-time maximum power generation is greater than the starting power of the indoor auxiliary heater, the photovoltaic system is controlled to supply power to the indoor auxiliary heater so that the indoor auxiliary heater can be started.

7. A control device for an air conditioner, characterized in that, include: The determination unit is used to determine the actual outdoor temperature of the outdoor heat exchanger. The control unit is used to control the indoor auxiliary heater to turn on and control the indoor fan to reverse when the actual outdoor temperature reaches the warning temperature threshold, so as to increase the outlet temperature of the refrigerant in the indoor heat exchanger.

8. An air conditioner, characterized in that, include: Outdoor unit and indoor unit; The control device for the air conditioner according to claim 7, wherein the control device is electrically connected to the indoor unit and the outdoor unit.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for the air conditioner as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for the air conditioner as described in any one of claims 1 to 6.

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