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

Abstract

The application relates to the technical field of air conditioners, and discloses a control method and a control device of an air conditioner and the air conditioner. The control method comprises the following steps: determining the operation mode of the air conditioner; periodically acquiring the outlet air temperature of an indoor unit when the air conditioner is in a heating mode; determining whether the operation frequency of a compressor reaches a target frequency when the outlet air temperature does not reach an outlet air temperature threshold; and increasing the operation frequency of the compressor when the operation frequency of the compressor is less than the target frequency. In the application, the indoor auxiliary heater is started only when the compressor has reached the target frequency but the outlet air temperature has not reached the temperature threshold, the problem that the energy consumption of the whole machine is high due to the unreasonable intervention time of the electric auxiliary heating in the prior art is solved, the indoor auxiliary heater is prevented from being frequently and invalidly started or being operated at full load for a long time, and therefore, the dual purposes of energy saving and efficiency improvement and comfortable heating are realized while preventing a large amount of electric energy from being wasted and reducing the use cost of users.

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] Traditional air conditioners using electric auxiliary heating (usually a PTC heater) operate with a relatively simple control logic when heating in low-temperature environments. Existing technologies often activate the electric auxiliary heater based solely on a simple threshold of outdoor ambient temperature or compressor startup. For example, a fixed outdoor temperature threshold (e.g., -5°C) is set, and the electric auxiliary heater operates at full power once the temperature drops below that point. This control strategy fails to comprehensively consider the actual indoor heat load, building insulation performance, and the compressor's current operating frequency, resulting in frequent ineffective activation or prolonged full-load operation of the PTC heater. This not only wastes a significant amount of electricity but also increases user operating costs. Summary of the Invention

[0003] This invention provides a control method, control device, and air conditioner to solve the problem of high overall energy consumption caused by unreasonable timing of electric auxiliary heating intervention in the prior art. In this invention, when the outlet air temperature has not reached the outlet air temperature threshold, the compressor frequency is preferentially increased to the target frequency, and the indoor auxiliary heater is activated only when the compressor has reached the target frequency, thereby achieving the dual purpose of energy saving and efficiency improvement as well as comfortable heating.

[0004] The first aspect of this invention provides a control method for an air conditioner, comprising: Determine the operating mode of the air conditioner; When the air conditioner is in heating mode, the outlet air temperature of the indoor unit is periodically obtained; If the outlet air temperature does not reach the outlet air temperature threshold, determine whether the operating frequency of the compressor reaches the target frequency. If the operating frequency of the compressor is lower than the target frequency, increase the operating frequency of the compressor; When the operating frequency of the compressor is not less than the target frequency, the auxiliary heater in the control room is started.

[0005] According to the control method for an air conditioner provided by the present invention, wherein the air conditioner is a photovoltaic air conditioner, the step of "controlling the start of the indoor auxiliary heater" includes: In hybrid mode, a first control command is output, which is used to control the indoor auxiliary heater to operate at full power. In the pure photovoltaic power supply mode, a second control command is output. The second control command is used to control the indoor auxiliary heater to adjust the operating power so that the operating temperature of the indoor auxiliary heater is within a preset temperature range. The lower limit of the preset temperature range is a first temperature threshold T1, and the upper limit of the preset temperature range is a second temperature threshold T2.

[0006] According to the control method of the air conditioner provided by the present invention, the indoor auxiliary heater is a positive temperature coefficient heater, and the Curie temperature of the indoor auxiliary heater is within the preset temperature range.

[0007] According to the control method for an air conditioner provided by the present invention, in the simple photovoltaic power supply mode, the control method for the air conditioner further includes: Obtain the available photovoltaic power of the photovoltaic system; Determine whether the available photovoltaic power is not less than a first power threshold, where the first power threshold is the total power required to maintain the compressor at the target frequency and the indoor auxiliary heater turned on to the first temperature threshold T1; If the available photovoltaic power is less than the first power threshold, the power level of the indoor auxiliary heater is reduced first, based on the real-time value of the available photovoltaic power. If the available photovoltaic power is still insufficient to allow the compressor to operate at the target frequency after the indoor auxiliary heater is turned off, the operating frequency of the compressor is further reduced.

[0008] According to the control method for an air conditioner provided by the present invention, after the step of "starting the auxiliary heater in the control room", the method further includes: During the operation of the indoor auxiliary heater, the indoor ambient temperature is acquired; Calculate the temperature difference ΔT obtained by subtracting the indoor ambient temperature from the user-set target temperature; If the temperature difference ΔT is less than or equal to a preset shutdown threshold, a third control command is output. The third control command is used to first control the indoor auxiliary heater to stop running, and after a first preset time delay, control the compressor to reduce its frequency according to the temperature difference ΔT.

[0009] According to the control method for an air conditioner provided by the present invention, the step of "re-controlling the compressor to operate at a reduced frequency according to the temperature difference ΔT" includes: When the temperature difference ΔT is greater than the second temperature difference threshold ΔT2 and not greater than the first temperature difference threshold ΔT1, the compressor is controlled to decrease to the first target frequency F1 at a first frequency reduction rate; wherein, the first temperature difference threshold ΔT1 is greater than the second temperature difference threshold ΔT2, and the first temperature difference threshold ΔT1 is not greater than the preset shutdown threshold. When the temperature difference ΔT is not less than zero and not greater than the second temperature difference threshold ΔT2, the compressor is controlled to decrease to the second target frequency F2 at the second frequency reduction rate; wherein the second target frequency F2 is less than the first target frequency F1, and the first frequency reduction rate is greater than the second frequency reduction rate. When the temperature difference ΔT is less than zero, the compressor is controlled to stop.

[0010] According to the control method for an air conditioner provided by the present invention, after the step of "periodically acquiring the outlet air temperature of the indoor unit", the method further includes: When the outlet air temperature reaches the outlet air temperature threshold, the compressor is controlled to maintain the current operating frequency.

[0011] A second aspect of the present invention provides a control device for an air conditioner, comprising: The first determining unit is used to determine the operating mode of the air conditioner; The acquisition unit is used to periodically acquire the air outlet temperature of the indoor unit when the air conditioner is in heating mode; The second determining unit is used to determine whether the operating frequency of the compressor reaches the target frequency when the outlet air temperature does not reach the outlet air temperature threshold. The control unit is configured to increase the operating frequency of the compressor when the operating frequency of the compressor is less than the target frequency; and to control the indoor auxiliary heater to start when the operating frequency of the compressor is not less than the target frequency.

[0012] A third aspect of the present invention provides an air conditioner, comprising an indoor unit, an outdoor unit, and a control device for the air conditioner as described above; the control device is electrically connected to the indoor unit and the outdoor unit.

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

[0014] The air conditioner control method provided by this invention first determines the air conditioner's operating mode, clarifying its current operating status and providing a prerequisite for subsequent targeted execution of heating control strategies. Next, while the air conditioner is in heating mode, the indoor unit's outlet air temperature is periodically acquired. This step allows for real-time monitoring and comprehensive reflection of the actual indoor heat load and building insulation performance, avoiding the errors caused by simply relying on outdoor ambient temperature (such as a fixed -5℃ critical point) in existing technologies. Subsequently, if the outlet air temperature does not reach the outlet air temperature threshold, it is determined whether the compressor's operating frequency has reached the target frequency. By comprehensively considering the compressor's current operating status, this method overcomes the shortcomings of traditional, relatively simple control logic, providing a basis for judgment. The reasonable timing of the indoor auxiliary heater's intervention provides a basis for this approach. Finally, when the compressor's operating frequency is lower than the target frequency, the compressor's operating frequency is increased first. Only when the compressor's operating frequency is not lower than the target frequency is the indoor auxiliary heater activated. This fully utilizes the compressor's own heating capacity and avoids premature intervention of the indoor auxiliary heater. Auxiliary heating is only activated when the compressor has reached the target frequency and the outlet air temperature has not yet reached the target. This solves the problem of high overall energy consumption caused by unreasonable timing of electric auxiliary heater intervention, and avoids frequent ineffective activation or long-term full-load operation of the heater. Ultimately, without reducing the user's heating comfort, it achieves the goals of significantly reducing energy waste, lowering user operating costs, and improving energy efficiency. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a flowchart illustrating the control method for an air conditioner provided by the present invention.

[0017] Figure 2 This is a schematic diagram of the control device for the air conditioner provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The following is combined with 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.

[0026] 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.

[0027] 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 operating mode of the air conditioner. By clarifying the current operating status, a basic premise is provided for the subsequent targeted implementation of heating control strategies.

[0028] S200: When the air conditioner is in heating mode, the outlet air temperature of the indoor unit is periodically acquired. By periodically monitoring the outlet air temperature, the actual indoor heat load and building insulation performance can be comprehensively reflected, avoiding the errors caused by simply judging based on the outdoor ambient temperature in existing technologies. Specifically, the indoor temperature sensor is used to detect the outlet air temperature of the indoor unit. After the control device determines that the air conditioner is in heating mode, it periodically acquires the outlet air temperature of the indoor unit from the indoor temperature sensor.

[0029] S300: When the outlet air temperature does not reach the outlet air temperature threshold, determine whether the compressor's operating frequency has reached the target frequency. By comprehensively considering the current operating status of the compressor, this overcomes the shortcomings of traditional, relatively simple control logic and provides a basis for determining the appropriate intervention time for the indoor auxiliary heater. Specifically, the control device compares the outlet air temperature with the stored temperature threshold. If the outlet air temperature does not reach the threshold, it obtains the compressor's operating frequency and compares it with the target frequency under the current environment to determine whether the compressor's operating frequency has reached the target frequency.

[0030] S400: When the compressor's operating frequency is lower than the target frequency, the compressor's operating frequency is increased. By prioritizing the increase to the target frequency, the compressor's own heating capacity is fully utilized, avoiding premature intervention of the electric auxiliary heater. When the compressor's operating frequency is not lower than the target frequency, the indoor auxiliary heater is activated. This means the indoor auxiliary heater is only activated when the compressor has reached the target frequency, solving the problem of high overall energy consumption caused by unreasonable timing of electric auxiliary heater intervention in existing technologies. It also avoids frequent ineffective activation or prolonged full-load operation of indoor auxiliary heaters (such as PTC heaters), thus preventing significant energy waste and reducing user costs while achieving the dual goals of energy saving, efficiency improvement, and comfortable heating. Specifically, when the control device determines that the compressor's operating frequency is lower than the target frequency, it sends a control command to the compressor to increase its operating frequency. When the control device determines that the compressor's operating frequency is not lower than the target frequency, it sends a control command to the indoor auxiliary heater to activate it.

[0031] In this embodiment, the air conditioner's operating mode is first determined, clarifying its current operating status and providing a foundation for subsequent targeted heating control strategies. Next, while the air conditioner is in heating mode, the indoor unit's outlet air temperature is periodically acquired. This step allows for real-time monitoring and comprehensive reflection of the actual indoor heat load and building insulation performance, avoiding errors caused by simply relying on outdoor ambient temperature (such as a fixed -5°C threshold) in existing technologies. Subsequently, if the outlet air temperature does not reach the threshold, it is determined whether the compressor's operating frequency has reached the target frequency. By comprehensively considering the compressor's current operating status, the shortcomings of traditional, relatively simple control logic are overcome, providing a basis for determining indoor auxiliary... The appropriate timing of heater intervention provides a basis for this approach. Finally, when the compressor's operating frequency is lower than the target frequency, the compressor's operating frequency is prioritized to be increased. Only when the compressor's operating frequency is not lower than the target frequency is the indoor auxiliary heater activated. This fully utilizes the compressor's own heating capacity and avoids premature intervention of the indoor auxiliary heater. Auxiliary heating is only activated when the compressor has reached the target frequency and the outlet air temperature has not yet met the standard. This solves the problem of high overall energy consumption caused by unreasonable timing of electric auxiliary heater intervention, and avoids frequent ineffective activation or prolonged full-load operation of the heater. Ultimately, without reducing the user's heating comfort, it achieves the goals of significantly reducing energy waste, lowering user operating costs, and improving energy efficiency.

[0032] In some embodiments of the present invention, the air conditioner is a photovoltaic air conditioner, and the step of "controlling the start of the indoor auxiliary heater" includes: In hybrid mode, a first control command is output, which is used to control the indoor auxiliary heater to operate at full power. By turning on the electric auxiliary heater at full power in hybrid mode with sufficient power supply, the actual heat load demand in the room can be quickly met, ensuring the user's heating experience and achieving the goal of comfortable heating.

[0033] In pure photovoltaic power supply mode, a second control command is output. This command controls the indoor auxiliary heater to adjust its operating power, ensuring its operating temperature remains within a preset temperature range. The lower limit of the preset temperature range is a first temperature threshold T1, and the upper limit is a second temperature threshold T2. The first temperature threshold T1 is less than the second temperature threshold T2. By dynamically adjusting the operating power of the indoor auxiliary heater and limiting it within a reasonable temperature range during pure photovoltaic power supply, prolonged full-load operation of the indoor auxiliary heater is avoided. This ensures basic heating needs are met while preventing significant waste of photovoltaic energy, further reducing overall energy consumption and user costs, achieving the dual goals of energy saving and efficiency improvement.

[0034] It's important to note that a photovoltaic (PV) air conditioner is an air conditioning system that uses solar energy as its primary or secondary energy source. Simply put, it integrates photovoltaic power generation technology into a traditional air conditioner, allowing the unit 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 standard AC compressor.

[0035] Optionally, the indoor auxiliary heater is a positive temperature coefficient heater, and the Curie temperature of the indoor auxiliary heater is within a preset temperature range. By matching the preset temperature range with the Curie temperature of the positive temperature coefficient heater, and utilizing its physical characteristic that the resistance increases sharply near the Curie temperature, thereby limiting the current, adaptive dynamic adjustment of the heating power is achieved.

[0036] Optionally, the second control command is used to control the operating temperature of the positive temperature coefficient (PTC) heater to be near the Curie temperature. By controlling its operating temperature to be maintained near the Curie temperature, the PTC heater can automatically reduce and adjust its operating power, thereby avoiding the problems of long-term full-load operation or frequent ineffective start-up of electric auxiliary heating in the prior art. While meeting the actual indoor heat load, it reduces a large amount of waste of electrical energy, reduces the overall energy consumption and user operating costs, and achieves the dual purpose of energy saving and efficiency improvement.

[0037] In some embodiments of the present invention, under a simple photovoltaic power supply mode, the control method for the air conditioner further includes: Obtaining the available photovoltaic power of the photovoltaic system and monitoring the energy supply in real time under the pure photovoltaic power supply mode provides reliable data support for subsequent rational allocation and control of electricity; Determine whether the available photovoltaic power is not less than the first power threshold. The first power threshold is the total power required to maintain the compressor at the target frequency and the indoor auxiliary heater to the first temperature threshold T1. By clarifying the total power demand boundary for the system to maintain high-load heating, it is possible to identify whether the current photovoltaic power supply meets the requirements for the compressor and electric auxiliary heater to operate simultaneously. When the available photovoltaic power is less than the first power threshold, the power level of the indoor auxiliary heater is preferentially reduced based on the real-time value of the available photovoltaic power. By prioritizing the reduction of energy consumption of the relatively low-efficiency electric auxiliary heater when photovoltaic power is insufficient, the large amount of energy wasted due to the indoor auxiliary heater running at full load for a long time is avoided, thus reducing the overall energy consumption of the unit. If the available photovoltaic power is still insufficient to allow the compressor to operate at the target frequency after the indoor auxiliary heater is turned off, the operating frequency of the compressor is further reduced. By prioritizing the operation of the compressor over the auxiliary heater, the compressor's own high-efficiency heating capacity is maximized under power supply constraints, achieving a dynamic balance between energy saving and comfortable heating, and solving the problem of increased user operating costs.

[0038] In some embodiments of the present invention, after the step of "starting the auxiliary heater in the control room", the method further includes: During the operation of the indoor auxiliary heater, the indoor ambient temperature is acquired. By monitoring the actual indoor temperature in real time, the current actual indoor heat load can be accurately reflected, providing reliable data support for subsequent adjustments and avoiding the shortcomings of traditional control methods that rely on a single parameter.

[0039] The temperature difference ΔT, obtained by subtracting the indoor ambient temperature from the user-set target temperature, can be calculated. By quantifying the temperature difference between user needs and the actual environment, the current dynamic heating demand can be comprehensively assessed, providing a scientific basis for rationally arranging the overall system operation strategy.

[0040] When the temperature difference ΔT is less than or equal to the preset shutdown threshold, a third control command is output. This third control command is used to first control the indoor auxiliary heater to stop operating. By prioritizing the shutdown of the energy-intensive electric auxiliary heater when approaching the target temperature, the indoor auxiliary heater is prevented from being ineffective or operating at full load for a long time, thereby reducing a large amount of energy waste and lowering the user's operating costs. After a first preset delay, the compressor is then controlled to reduce its frequency according to the temperature difference ΔT. By delaying the compressor's frequency reduction, the compressor's own heating capacity is utilized to ensure a smooth transition, guaranteeing the continuity and stability of the system's heating. This avoids indoor temperature fluctuations caused by shutdown or simultaneous frequency reduction, achieving energy saving and efficiency improvement while fully ensuring the user's comfortable heating experience.

[0041] Optionally, the step of "re-controlling the compressor to operate at a reduced frequency based on the temperature difference ΔT" includes: When the temperature difference ΔT is greater than the second temperature difference threshold ΔT2 but not greater than the first temperature difference threshold ΔT1, the compressor is controlled to decrease to the first target frequency F1 at a first frequency reduction rate. Herein, the first temperature difference threshold ΔT1 is greater than the second temperature difference threshold ΔT2 and the first temperature difference threshold ΔT1 is not greater than the preset shutdown threshold. By performing initial frequency reduction at a faster rate when the temperature difference is relatively large, the compressor output can be adjusted in a timely manner according to the changes in the actual indoor heat load. While ensuring sufficient heating to maintain user comfort, the overall energy consumption of the unit is initially reduced.

[0042] When the temperature difference ΔT is not less than zero and not greater than the second temperature difference threshold ΔT2, the compressor is controlled to decrease to the second target frequency F2 at the second frequency reduction rate. The second target frequency F2 is less than the first target frequency F1, and the first frequency reduction rate is greater than the second frequency reduction rate. By smoothly reducing the frequency at a slower rate when the indoor temperature is close to the target temperature (small temperature difference), indoor temperature fluctuations caused by frequency abrupt changes are avoided. While fully ensuring a comfortable heating experience, the compressor status is further controlled to prevent a large waste of electrical energy.

[0043] When the temperature difference ΔT is less than zero, the compressor is controlled to stop. By decisively stopping the compressor when the actual indoor temperature has reached or exceeded the set target temperature, the ineffective operation or long-term full-load operation of the compressor is completely avoided, the waste of electrical energy is minimized, the user's operating cost is reduced, and the goal of energy saving and efficiency improvement of the whole machine is achieved.

[0044] In some embodiments of the present invention, after the step of "periodically acquiring the outlet air temperature of the indoor unit", the method further includes: when the outlet air temperature reaches the outlet air temperature threshold, controlling the compressor to maintain the current operating frequency. By keeping the compressor running stably when the outlet air temperature meets the requirements, it is indicated that the current heating capacity of the compressor can fully meet the needs of the actual indoor heat load and the building insulation performance, thereby avoiding the waste of electricity caused by blindly increasing the frequency of the compressor. At the same time, it also directly avoids the ineffective intervention of the indoor auxiliary heater. While ensuring that users obtain a continuous, stable and comfortable heating experience, it further reduces the overall energy consumption and user operating costs, achieving the dual purpose of energy saving and efficiency improvement.

[0045] 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.

[0046] 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.

[0047] like Figure 2 As shown, a specific embodiment of the second aspect of the present invention provides a control device for an air conditioner, comprising a first determining unit, an acquiring unit, a second determining unit, and a control unit. The first determining unit is used to determine the operating mode of the air conditioner, providing a basis for subsequent targeted execution of heating control strategies by clarifying the current operating state. The acquiring unit is used to periodically acquire the outlet air temperature of the indoor unit when the air conditioner is in heating mode. By monitoring the outlet air temperature in real time, it can comprehensively reflect the actual indoor heat load and building insulation performance, avoiding the errors caused by simply judging based on the outdoor ambient temperature in the prior art. The second determining unit is used to determine whether the compressor's operating frequency has reached the target frequency when the outlet air temperature has not reached the outlet air temperature threshold. By comprehensively considering the current operating status of the compressor, it overcomes the shortcomings of the relatively simple traditional control logic and provides a scientific basis for determining the appropriate intervention time of the indoor auxiliary heater. The control unit is used to increase the compressor's operating frequency when the compressor's operating frequency is lower than the target frequency. By prioritizing the increase of the compressor's frequency to the target frequency, the compressor's own heating capacity is fully utilized, avoiding premature intervention of the electric auxiliary heater. It is also used to control the indoor auxiliary heater to start when the compressor's operating frequency is not lower than the target frequency. That is, the indoor auxiliary heater is only controlled to start when the compressor has reached the target frequency. This solves the problem of high energy consumption caused by unreasonable timing of electric auxiliary heater intervention in the prior art. It avoids the indoor auxiliary heater (PTC heater) from frequently and ineffectively starting or running at full load for a long time. Thus, while preventing a large amount of energy waste and reducing user operating costs, it achieves the dual goals of energy saving and efficiency improvement and comfortable heating.

[0048] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a control method for the air conditioner, the method including: S100, determining the operating mode of the air conditioner; S200, when the air conditioner is in heating mode, periodically acquiring the outlet air temperature of the indoor unit; S300, if the outlet air temperature does not reach the outlet air temperature threshold, determining whether the compressor operating frequency reaches the target frequency; S400, if the compressor operating frequency is less than the target frequency, increasing the compressor operating frequency; and if the compressor operating frequency is not less than the target frequency, controlling the indoor auxiliary heater to start.

[0049] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a 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, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0050] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method for the air conditioner provided by the above methods. The method includes: S100, determining the operating mode of the air conditioner; S200, when the air conditioner is in heating mode, periodically acquiring the outlet air temperature of the indoor unit; S300, when the outlet air temperature does not reach the outlet air temperature threshold, determining whether the operating frequency of the compressor reaches the target frequency; S400, when the operating frequency of the compressor is less than the target frequency, increasing the operating frequency of the compressor; and when the operating frequency of the compressor is not less than the target frequency, controlling the indoor auxiliary heater to start.

[0051] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program 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 operating mode of the air conditioner; S200, when the air conditioner is in heating mode, periodically acquiring the outlet air temperature of the indoor unit; S300, when the outlet air temperature does not reach the outlet air temperature threshold, determining whether the operating frequency of the compressor reaches the target frequency; S400, when the operating frequency of the compressor is less than the target frequency, increasing the operating frequency of the compressor; and when the operating frequency of the compressor is not less than the target frequency, controlling the indoor auxiliary heater to start.

[0052] 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.

[0053] 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.

[0054] 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 operating mode of the air conditioner; When the air conditioner is in heating mode, the outlet air temperature of the indoor unit is periodically obtained; If the outlet air temperature does not reach the outlet air temperature threshold, determine whether the compressor's operating frequency reaches the target frequency. If the operating frequency of the compressor is lower than the target frequency, increase the operating frequency of the compressor; When the operating frequency of the compressor is not less than the target frequency, the auxiliary heater in the control room is started.

2. The control method for an air conditioner according to claim 1, characterized in that, The air conditioner is a photovoltaic air conditioner, and the step of "starting the indoor auxiliary heater" includes: In hybrid mode, a first control command is output, which is used to control the indoor auxiliary heater to operate at full power. In the pure photovoltaic power supply mode, a second control command is output. The second control command is used to control the indoor auxiliary heater to adjust the operating power so that the operating temperature of the indoor auxiliary heater is within a preset temperature range. The lower limit of the preset temperature range is a first temperature threshold T1, and the upper limit of the preset temperature range is a second temperature threshold T2.

3. The control method for an air conditioner according to claim 2, characterized in that, The indoor auxiliary heater is a positive temperature coefficient heater, and the Curie temperature of the indoor auxiliary heater is within the preset temperature range.

4. The control method for an air conditioner according to claim 2, characterized in that, In the simple photovoltaic power supply mode, the control method of the air conditioner further includes: Obtain the available photovoltaic power of the photovoltaic system; Determine whether the available photovoltaic power is not less than a first power threshold, where the first power threshold is the total power required to maintain the compressor at the target frequency and the indoor auxiliary heater turned on to the first temperature threshold T1; If the available photovoltaic power is less than the first power threshold, the power level of the indoor auxiliary heater is reduced first, based on the real-time value of the available photovoltaic power. If the available photovoltaic power is still insufficient to allow the compressor to operate at the target frequency after the indoor auxiliary heater is turned off, the operating frequency of the compressor is further reduced.

5. The control method for an air conditioner according to claim 1, characterized in that, Following the step of "starting the auxiliary heater in the control room", the following is also included: During the operation of the indoor auxiliary heater, the indoor ambient temperature is acquired; Calculate the temperature difference ΔT obtained by subtracting the indoor ambient temperature from the user-set target temperature; If the temperature difference ΔT is less than or equal to a preset shutdown threshold, a third control command is output. The third control command is used to first control the indoor auxiliary heater to stop running, and after a first preset time delay, control the compressor to reduce its frequency according to the temperature difference ΔT.

6. The control method for an air conditioner according to claim 5, characterized in that, The step of "re-controlling the compressor to reduce its frequency based on the temperature difference ΔT" includes: When the temperature difference ΔT is greater than the second temperature difference threshold ΔT2 and not greater than the first temperature difference threshold ΔT1, the compressor is controlled to decrease to the first target frequency F1 at a first frequency reduction rate; wherein, the first temperature difference threshold ΔT1 is greater than the second temperature difference threshold ΔT2, and the first temperature difference threshold ΔT1 is not greater than the preset shutdown threshold. When the temperature difference ΔT is not less than zero and not greater than the second temperature difference threshold ΔT2, the compressor is controlled to decrease to the second target frequency F2 at the second frequency reduction rate; wherein the second target frequency F2 is less than the first target frequency F1, and the first frequency reduction rate is greater than the second frequency reduction rate. When the temperature difference ΔT is less than zero, the compressor is controlled to stop.

7. The control method for an air conditioner according to any one of claims 1 to 6, characterized in that, Following the step of "periodically acquiring the outlet air temperature of the indoor unit", the following is also included: When the outlet air temperature reaches the outlet air temperature threshold, the compressor is controlled to maintain the current operating frequency.

8. A control device for an air conditioner, characterized in that, include: The first determining unit is used to determine the operating mode of the air conditioner; The acquisition unit is used to periodically acquire the air outlet temperature of the indoor unit when the air conditioner is in heating mode; The second determining unit is used to determine whether the operating frequency of the compressor reaches the target frequency when the outlet air temperature does not reach the outlet air temperature threshold. A control unit is used to increase the operating frequency of the compressor when the operating frequency of the compressor is less than the target frequency. It is also used to control the indoor auxiliary heater to start when the operating frequency of the compressor is not less than the target frequency.

9. An air conditioner, characterized in that, It includes an indoor unit, an outdoor unit, and a control device for the air conditioner as described in claim 8; the control device is electrically connected to the indoor unit and the outdoor unit.

10. 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 of the air conditioner as described in any one of claims 1 to 7.

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