Frequency conversion control method and system, air conditioner and storage medium

Abstract

The invention discloses a frequency conversion control method and system, an air conditioner and a storage medium. The method comprises the steps that the outdoor environment temperature is obtained, and a first operation frequency is determined according to the temperature interval where the outdoor environment temperature is located; wherein the first operation frequency is the minimum operation frequency of the air conditioner in the temperature interval; the air conditioner is adjusted to operate at the first operation frequency; if it is detected that the indoor environment temperature is in the first interval, the operation frequency of the air conditioner is adjusted according to the first change speed of the indoor environment temperature till the indoor environment temperature is in the second interval, and the step of adjusting the air conditioner to operate at the first operation frequency is returned; wherein if the air conditioner runs in a refrigeration mode, the numerical value in the second interval is smaller than the numerical value in the first interval. According to the embodiment, the problem of high energy consumption of the air conditioner is solved, and the temperature control precision is improved. The method can be widely applied to the technical field of frequency conversion.

Description

Technical Field

[0001] The present invention relates to the field of frequency conversion technology, and in particular to a frequency conversion control method, system, air conditioner and storage medium. Background Art

[0002] As people's living standards improve, the use of air conditioners is increasing, and the total power consumption of air conditioners is also increasing. Therefore, reducing the energy consumption of air conditioners has become a topic that must be studied, hoping to achieve energy conservation and environmental protection while meeting comfort. In related technologies, the energy-saving method of variable frequency air conditioners is generally to cool the room until the indoor temperature reaches the set temperature and then turn off the air conditioner. Then, after the accumulated air conditioner downtime reaches a certain time, the air conditioner is restarted to cool the room. In this way, after the air conditioner is turned off, the indoor temperature will rise rapidly, and the accuracy of room temperature control is poor, which affects the user experience; at the same time, after the temperature rises, it is necessary to run the cooling again, which cannot alleviate the problem of high energy consumption. Summary of the invention

[0003] The purpose of the present invention is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0004] To this end, an object of the present invention is to provide a high-precision frequency conversion control method, system, air conditioner and storage medium.

[0005] In order to achieve the above technical purpose, one aspect of the embodiment of the present invention provides a variable frequency control method, comprising the following steps: obtaining the outdoor ambient temperature, and determining a first operating frequency according to the temperature interval of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature interval; adjusting the air conditioner to operate at the first operating frequency; if it is detected that the indoor ambient temperature is in the first interval, adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second interval, and returning to the step of adjusting the air conditioner to operate at the first operating frequency; wherein, if the air conditioner is in cooling operation, the values ​​in the second interval are all less than the values ​​in the first interval; if the air conditioner is in heating operation, the values ​​in the second interval are all greater than the values ​​in the first interval. The embodiment of the present application determines the minimum operating frequency according to the temperature interval of the indoor ambient temperature, so that the air conditioner works at the most suitable frequency lower limit, which is conducive to reducing energy consumption; at the same time, when the indoor ambient temperature is in the first interval, the embodiment of the present application adjusts the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature, which alleviates the problem of a significant increase in the standby operating temperature and is conducive to improving the accuracy of temperature control. Therefore, the embodiments of the present application are helpful in alleviating the high energy consumption problem of air conditioning and improving the temperature control accuracy.

[0006] In some embodiments, the variable frequency control method of the embodiment of the present invention, if it is detected that the indoor ambient temperature is in the first range, adjusts the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second range, including:

[0007] Acquire a first change rate of the indoor ambient temperature, and if it is detected that the indoor ambient temperature is in a first interval, determine a third operating frequency according to the first change rate, and adjust the air conditioner to operate at the third operating frequency;

[0008] The first change speed and the third operating frequency are continuously detected and updated, and the air conditioner is adjusted to operate at the updated third operating frequency until it is detected that the indoor ambient temperature is in the second interval.

[0009] In some embodiments, in one embodiment of the present invention, adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature includes:

[0010] Acquire several first ambient temperatures in the room in the previous time period, and determine the temperature difference according to the first ambient temperatures; the first ambient temperatures are the temperatures at both ends of a preset time interval;

[0011] Determining a first change speed according to the temperature difference and the preset time interval;

[0012] determining a difference value according to a change interval in which the first change speed is located;

[0013] A third operating frequency is determined according to the first operating frequency and the difference, and the air conditioner is adjusted to operate at the third operating frequency.

[0014] In some embodiments, in an embodiment of the present invention, determining the difference according to the change interval in which the first change speed is located includes:

[0015] If the air conditioner is in cooling operation and the first change speed is in a first change interval, determining a first difference;

[0016] Alternatively, if the air conditioner is in cooling operation and the first change speed is in a second change interval, determining a second difference;

[0017] Among them, if the values ​​in the first change interval and the second change interval are both greater than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the second difference is less than the first difference, and the second difference is greater than zero; if the values ​​in the first change interval and the second change interval are both less than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the first difference is greater than the second difference, and the first difference is less than zero.

[0018] In some embodiments, in one embodiment of the present invention, the continuously detecting and updating the first change speed and the third operating frequency, and adjusting the air conditioner to operate at the updated third operating frequency until the indoor ambient temperature is detected to be in the second interval, includes:

[0019] The first change speed and the third operating frequency are continuously detected and updated. If the first change speed determined at the current moment is the preset change speed, the air conditioner is kept running at the third operating frequency at the current moment until it is detected that the indoor ambient temperature is in the second interval.

[0020] In some embodiments, in one embodiment of the present invention, before adjusting the air conditioner to operate at the first operating frequency, the method further includes:

[0021] Determining a second operating frequency according to the temperature range; the second operating frequency is greater than the first operating frequency;

[0022] It is determined that the air conditioner is running at the second operating frequency, and if it is detected that the indoor ambient temperature is in the second interval, the air conditioner is adjusted to run at the first operating frequency.

[0023] In some embodiments, in one embodiment of the present invention, the method further comprises:

[0024] If it is detected that the indoor ambient temperature is in the third interval, return to the step of determining that the air conditioner is operating at the second operating frequency; wherein, if the air conditioner is in cooling operation, the minimum value of the third interval is greater than or equal to the maximum value of the first interval; if the air conditioner is in heating operation, the maximum value of the third interval is less than or equal to the minimum value of the first interval.

[0025] On the other hand, an embodiment of the present invention provides a variable frequency control system, including:

[0026] The first module is used to obtain the outdoor ambient temperature and determine the first operating frequency according to the temperature range of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature range;

[0027] A second module is used to adjust the air conditioner to operate at the first operating frequency;

[0028] The third module is used to adjust the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second range if it is detected that the indoor ambient temperature is in the first range, and is connected to the second module; wherein, if the air conditioner is in cooling operation, the values ​​in the second range are all smaller than the values ​​in the first range; if the air conditioner is in heating operation, the values ​​in the second range are all larger than the values ​​in the first range.

[0029] In another aspect, an embodiment of the present invention provides an air conditioner, comprising:

[0030] at least one processor;

[0031] at least one memory for storing at least one program;

[0032] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned frequency conversion control method.

[0033] On the other hand, an embodiment of the present invention provides a storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to implement the above-mentioned frequency conversion control method.

[0034] The embodiment of the present application includes at least the following beneficial effects: the method provided by the embodiment of the present invention includes: obtaining the outdoor ambient temperature, and determining the first operating frequency according to the temperature interval in which the outdoor ambient temperature is located; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature interval; adjusting the air conditioner to operate at the first operating frequency; if it is detected that the indoor ambient temperature is in the first interval, adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second interval, and returning to the step of adjusting the air conditioner to operate at the first operating frequency; wherein, if the air conditioner is in cooling operation, the values ​​in the second interval are all less than the values ​​in the first interval; if the air conditioner is in heating operation, the values ​​in the second interval are all greater than the values ​​in the first interval. The embodiment of the present application determines the minimum operating frequency according to the temperature interval in which the indoor ambient temperature is located, so that the air conditioner works at the most suitable frequency lower limit, which is conducive to reducing energy consumption; at the same time, when the indoor ambient temperature is in the first interval, the embodiment of the present application adjusts the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature, which alleviates the problem of a significant increase in the standby operating temperature and is conducive to improving the accuracy of temperature control. Therefore, the embodiment of the present application is conducive to alleviating the high energy consumption problem of the air conditioner and improving the accuracy of temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the embodiments of the present invention or the drawings of related technical solutions in the prior art are introduced below. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flow chart of an embodiment of the frequency conversion control method provided by the present invention;

[0037] Figure 2 A schematic diagram of an embodiment of the temperature division intervals of the refrigeration process provided by the present invention;

[0038] Figure 3 A schematic diagram of an embodiment of the temperature division interval of the heating process provided by the present invention

[0039] Figure 4 A flow chart of another embodiment of the frequency conversion control method provided by the present invention;

[0040] Figure 5 A schematic structural diagram of an embodiment of a frequency conversion control system provided by the present invention;

[0041] Figure 6 A schematic structural diagram of an embodiment of an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0043] With the improvement of people's living standards, the number of air conditioners installed is increasing, and the proportion of air conditioner power consumption in the power grid is increasing. Therefore, reducing air conditioner energy consumption has become a topic that the air conditioning industry has to study, hoping to achieve energy saving while meeting comfort requirements. The existing variable frequency air conditioning energy saving method is generally to cool the room until the indoor temperature reaches the set temperature and then turn off the air conditioner. Then, after the accumulated air conditioner downtime reaches a certain time, the air conditioner is restarted to cool the room. In this way, after the air conditioner is turned off, the indoor temperature will rise, and the accuracy of room temperature control is difficult to guarantee. In the automatic energy-saving control logic of the present invention, it is intended to achieve a balance between the average low-frequency cooling and heating capacity and the building load, so that the machine runs in the low-frequency band most of the time, and at the same time combines the control of the indoor and outdoor unit speeds and superheat to achieve the maximum energy saving effect; and in this process, the effects of rapid cooling and heating and comfort are also achieved.

[0044] The variable frequency control method provided in the present application is to find the most suitable frequency lower limit (i.e., the first operating frequency in the present application) according to the indoor temperature change rate during continuous low-frequency operation after the air conditioner has quickly cooled or heated. This allows the frequency of the air conditioner to be controlled near the most suitable frequency lower limit for most of the time during operation, and achieves the purpose of low power consumption over a wide outdoor temperature range while satisfying rapid cooling, heating, and comfort.

[0045] In the embodiment of the present application, during the entire cooling or heating process, the air conditioner is operated in a lower frequency range for most of the time, and the purpose of low energy consumption and continuous energy saving is achieved through optimal control of indoor and outdoor rotation speeds and low-frequency superheat.

[0046] The frequency conversion control method and system proposed in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First, the frequency conversion control method proposed in the embodiments of the present invention will be described with reference to the accompanying drawings.

[0047] Reference Figure 1 , a frequency conversion control method is provided in an embodiment of the present invention. The frequency conversion control method in the embodiment of the present invention can be applied to a terminal, can be applied to a server, or can be software running in a terminal or a server. The terminal can be a tablet computer, a laptop computer, a desktop computer, etc., but is not limited to this. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The frequency conversion control method in the embodiment of the present invention mainly includes the following steps:

[0048] S100: Obtaining the outdoor ambient temperature, and determining a first operating frequency according to the temperature range of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature range;

[0049] S200: adjusting the air conditioner to operate at a first operating frequency;

[0050] S300: If it is detected that the indoor ambient temperature is in the first interval, adjust the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second interval, and return to the step of adjusting the air conditioner to operate at the first operating frequency; wherein, if the air conditioner is in cooling operation, the values ​​in the second interval are all smaller than the values ​​in the first interval; if the air conditioner is in heating operation, the values ​​in the second interval are all larger than the values ​​in the first interval.

[0051] In some possible implementations, the first interval in the present application may be a temperature interval in which the temperature rises during cooling and the human body begins to feel uncomfortable; and a temperature interval in which the temperature decreases during heating and the human body begins to feel uncomfortable. The first change rate in the present application is used to characterize the change in the indoor ambient temperature. The second interval in the present application may be: an interval slightly lower than the desired temperature during cooling; an interval slightly higher than the desired temperature during heating. It is understandable that the solution provided by the present application operates at the lowest operable frequency (first operating frequency) during cooling to reduce energy consumption; if the indoor environment cannot be kept at a low temperature, then after the temperature rises (first interval), the operating frequency is adjusted according to the change in the indoor ambient temperature to adjust the indoor temperature until the indoor ambient temperature meets the second interval, and the air conditioner is restored to operate at the first operating frequency. The present application can operate the air conditioner at the first operating frequency in most cases to reduce energy consumption; and can also adjust the operating frequency in real time to improve the temperature control accuracy.

[0052] It can be understood that the air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor fan and indoor temperature detection modules such as indoor temperature and indoor heat exchanger coil temperature; the outdoor unit includes a compressor, an outdoor fan, a four-way valve, a throttling element, related auxiliary components and outdoor temperature detection modules such as outdoor ambient temperature and outdoor heat exchanger coil temperature.

[0053] After receiving the continuous energy-saving operation instruction, the air conditioner enters the continuous energy-saving operation mode. The outdoor temperature detection module detects the current outdoor ambient temperature and indoor ambient temperature, and controls the air conditioner to perform rapid cooling (or heating) according to the operating parameters of the current outdoor ambient temperature range. When the air conditioner works according to the rapid cooling operation parameters for a period of time and reaches the conditions for exiting rapid cooling, the air conditioner is controlled to exit rapid cooling operation and enter low-frequency operation. During the low-frequency operation of the air conditioner, the indoor ambient temperature and the temperature rise and fall rates are detected in real time. After the air conditioner starts the low-frequency operation time, the indoor ambient temperature change rate is obtained, and the intermediate transition operation frequency is designed according to the indoor temperature change rate, so that the cooling capacity of the air conditioner low-frequency operation is infinitely close to the building load, so that the machine maintains low-frequency operation, and then the optimal energy-saving effect is achieved through the linkage of indoor and outdoor speeds and overheating control.

[0054] The specific control is as follows (rapid cooling and continuous energy-saving operation):

[0055] The outdoor ambient temperature is divided into n intervals, and each interval is set with automatic control set temperature, maximum operating frequency under different outdoor temperature intervals, intermediate transition frequency, minimum operating frequency and fan speed and other air conditioning operating parameters. The air conditioner detects the indoor ambient temperature, outdoor ambient temperature, whole machine operating power and air conditioner cumulative operating time in real time.

[0056] The continuous energy-saving operation mode of the air conditioner is stipulated to work for 8 hours. Considering the different sizes of actual user rooms, in order to ensure energy-saving comfort, the continuous energy-saving operation of the air conditioner is initially set in four stages: the first stage is the rapid cooling (or heating) stage, the second stage is the low-frequency cooling (or heating) stage, the third stage is the fuzzy control low-frequency cooling (or heating) stage, and the fourth stage is the low-frequency cooling (or heating) stage. The low-frequency operation parameters of the second stage and the fourth stage are consistent. It should be noted that the process from step S100 to step S300 is the control process of the second and third stages in this application.

[0057] The air conditioner receives the continuous energy-saving operation instruction and controls the air conditioner to enter the continuous energy-saving operation mode. According to the outdoor ambient temperature, the outdoor temperature range n is set. i .

[0058] Phase 1:

[0059] The outdoor temperature detection module of the air conditioner detects the current outdoor ambient temperature and controls the air conditioner to operate according to the fast cooling (or fast heating) operating parameters (i.e., the second operating frequency in this application) of the temperature range where the current outdoor ambient temperature is located. After the air conditioner operates according to the fast cooling (or fast heating) for a period of time t1, when the indoor ambient temperature ≤ the set temperature T a -△T1 (refer to Figure 2S2 shown); or the indoor ambient temperature ≥ the set temperature T a +△T1 (refer to heating operation Figure 3 The above temperature judgment is collectively referred to as the indoor environment temperature entering the second interval, and the adjustment process enters the second stage. It can be understood that this application has no specific requirements for the operation time of each operation stage, and the indoor environment temperature of each operation stage is used as the judgment standard to adjust the stage.

[0060] Phase 2:

[0061] The second stage is the low-frequency continuous energy-saving operation stage, and the continuous energy-saving operation range is the set temperature T a -△T1≤Indoor ambient temperature≤Set temperature T a +△T1 (reference Figure 2 The cooling operation S4 is shown in the figure. The operating frequency of the whole process is F min1 (ie, the first operating frequency in this application), operating time t2, outdoor speed Fanspeed1, when the set temperature T a +△T2≤Indoor ambient temperature (refer to Figure 2 S1 of cooling operation shown in the figure); or the indoor ambient temperature ≤ the set temperature T a -△T2 (refer to Figure 3 S1) of heating operation shown, Figure 2 and Figure 3 S1 in the present application is the first interval, and the air conditioner is adjusted to enter the third stage. It should be noted that in other embodiments, during cooling operation, the continuous energy-saving operation range is: the set temperature T a -△T1≤Indoor ambient temperature≤Set temperature T a +△T2; During heating operation, the continuous energy-saving operation range is the set temperature T a -△T2≤Indoor ambient temperature≤Set temperature T a +△T1 (reference Figure 3 The specific value of the continuous energy-saving operation range can be adjusted by a person skilled in the art according to actual needs, and this application does not specifically limit it. In some embodiments, the first interval during cooling operation can be: the set temperature T a +△T2≤Indoor ambient temperature≤T a +△T3; The first interval during heating operation can be the set temperature T a -△T3≤Indoor ambient temperature≤Set temperature T a -△T2.

[0062] Phase 3:

[0063] Find F by fuzzy temperature change rate min2 =Fmin1 +X i , make the temperature change acceleration approach 0, and find the operating frequency F that achieves room temperature equilibrium min2 (i.e., the third operating frequency in this application), and then the compressor operating frequency F min2 +X i To continue cooling, at the same time, the external machine speed Fanspeed2 and frequency F min2 +X i Linear correlation control is performed, and the running time is t3. When the indoor ambient temperature ≤ the set temperature T a -△T1 (reference Figure 2 S2 of cooling operation shown in the figure); or when the set temperature T a +△T1≤Indoor ambient temperature (refer to Figure 3 The heating operation S2) shown in FIG. 1 enters the fourth stage.

[0064] Phase 4:

[0065] The fourth stage is the low-frequency continuous energy-saving operation stage. The low-frequency continuous energy-saving operation range is the set temperature T a -△T1≤Indoor ambient temperature≤Set temperature T a +△T1, at this time the operating frequency of the whole process is F min1 , running time is t4, outdoor speed is Fanspeed1.

[0066] During the above operation period, when the indoor ambient temperature ≥ the set temperature T at any time a +△T3 (or indoor ambient temperature ≤ set temperature T a -△T3, i.e. the third interval in the present application), i.e. entering the first stage of rapid cooling (or rapid heating) operation mode, and then cyclically operating according to the above four stages.

[0067] It should be noted that, in the above example, 0<△T1<△T2<△T3.

[0068] Optionally, in one embodiment of the present invention, if it is detected that the indoor ambient temperature is in a first range, adjusting the operating frequency of the air conditioner according to a first change rate of the indoor ambient temperature until the indoor ambient temperature is in a second range includes:

[0069] Acquire a first change rate of the indoor ambient temperature, and if it is detected that the indoor ambient temperature is in a first interval, determine a third operating frequency according to the first change rate, and adjust the air conditioner to operate at the third operating frequency;

[0070] The first change speed and the third operating frequency are continuously detected and updated, and the air conditioner is adjusted to operate at the updated third operating frequency until it is detected that the indoor ambient temperature is in the second interval.

[0071] In some possible implementations, the embodiment of the present application determines the third operating frequency through the first change speed, and adjusts the air conditioner to operate at the third operating frequency. It should be noted that the embodiment of the present application can set the corresponding relationship between the first change speed and the third operating frequency through a preset table / curve, and then determine the third operating frequency through a preset table / curve according to the first change speed. The embodiment of the present application can also set the corresponding relationship between the first change speed and the third operating frequency through a functional relationship, and then determine the third operating frequency through a functional relationship according to the first change speed. The embodiment of the present application can also determine the corresponding relationship between the first change speed and the third operating frequency through a large model by artificial intelligence, and then determine the third operating frequency through a large model according to the first change speed. Of course, with the advancement of technology, the relationship between the first change speed and the third operating frequency can also be determined by other feasible methods, and the present application does not limit the specific method. At the same time, the present application needs to detect and update the first change speed and the third operating frequency in real time. Specifically, the time attribute can be set to regularly update the first change speed, and then adjust the third operating frequency; the temperature change threshold can also be set according to the change of the indoor ambient temperature to determine the timing of updating the first change speed.

[0072] Optionally, in one embodiment of the present invention, adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature includes:

[0073] Acquire several first ambient temperatures in the room in the previous time period, and determine the temperature difference according to the first ambient temperatures; the first ambient temperatures are the temperatures at both ends of the preset time interval;

[0074] Determining a first change speed according to the temperature difference and a preset time interval;

[0075] Determining a difference value according to a change interval in which the first change speed is located;

[0076] A third operating frequency is determined according to the first operating frequency and the difference, and the air conditioner is adjusted to operate at the third operating frequency.

[0077] In some possible implementations, the first change rate is obtained by measuring several first ambient temperatures in the previous time period of the current moment. Specifically, the first ambient temperature may be the temperature at both ends of the preset time interval, and the temperature difference is obtained by calculating the difference between the temperatures at both ends; the first ambient temperature may be several paired temperatures, and then several temperature differences are obtained. The present application can determine several temperature changes in the time interval according to the temperature difference and the preset time interval, and obtain the first change rate after averaging or weighted averaging several temperature changes. It should be noted that the preset time interval in the present application can be a fixed time interval, or it can be set according to demand, and is not specifically limited. The temperature difference in the present application is the difference corresponding to the temperature at both ends of the preset time interval. Then, the present application can determine the difference according to the change interval in which the first change rate is located; and then determine the third operating frequency according to the first operating frequency and the difference. The present application performs frequency adjustment on the basis of the first operating frequency, so that the operating frequency is close to the minimum operating frequency, and minimizes energy consumption.

[0078] Optionally, in one embodiment of the present invention, determining the difference according to the change interval in which the first change speed is located includes:

[0079] If the air conditioner is in cooling operation and the first change speed is in the first change interval, determining a first difference;

[0080] Alternatively, if the air conditioner is in cooling operation and the first change speed is in the second change interval, a second difference is determined;

[0081] Among them, if the values ​​in the first change interval and the second change interval are both greater than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the second difference is less than the first difference, and the second difference is greater than zero; if the values ​​in the first change interval and the second change interval are both less than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the first difference is greater than the second difference, and the first difference is less than zero.

[0082] In the present application, during refrigeration operation, the change of the first difference is positively correlated with the change of the first change speed. At the same time, if the first change speed is positive, the first difference is positive; if the first change speed is negative, the first difference is negative. The adjustment logic of the second difference is the same as the first difference.

[0083] In some other embodiments, determining the difference according to the change interval in which the first change speed is located includes:

[0084] If the air conditioner is in heating operation and the first change speed is in the third change interval, determining a third difference;

[0085] Alternatively, if the air conditioner is in cooling operation and the first change speed is in a fourth change interval, a fourth difference is determined;

[0086] Among them, if the values ​​in the third change interval and the fourth change interval are both greater than or equal to zero, and the values ​​in the third change interval are both greater than the values ​​in the fourth change interval, the third difference is less than the fourth difference, and the fourth difference is less than zero; if the values ​​in the third change interval and the fourth change interval are both less than or equal to zero, and the values ​​in the third change interval are both greater than the values ​​in the fourth change interval, the third difference is less than the fourth difference, and the third difference is greater than zero.

[0087] In some possible implementations, during heating operation, the change in the third difference is negatively correlated with the change in the first change rate. At the same time, if the first change rate is positive, the third difference is negative; if the first change rate is negative, the third difference is negative. The adjustment logic of the fourth difference is the same as that of the third difference.

[0088] Optionally, in one embodiment of the present invention, continuously detecting and updating the first change speed and the third operating frequency, and adjusting the air conditioner to operate at the updated third operating frequency until it is detected that the indoor ambient temperature is in the second interval, comprises:

[0089] The first change speed and the third operating frequency are continuously detected and updated. If the first change speed determined at the current moment is the preset change speed, the air conditioner is kept running at the third operating frequency at the current moment until the indoor ambient temperature is detected to be in the second interval.

[0090] In some possible implementations, the preset change speed may be any value within a range that is infinitely close to zero, or the preset change speed is used to characterize the range. If the first change speed in the time period before the current moment is the preset change speed, the third operating frequency at the current moment is not updated, and the third operating frequency at the current moment is maintained to maintain a stable change in temperature. Until the temperature reaches the second range, the air conditioner is adjusted to operate at the first operating frequency.

[0091] Optionally, in one embodiment of the present invention, before adjusting the air conditioner to operate at the first operating frequency, the method further includes:

[0092] Determining a second operating frequency according to the temperature range; the second operating frequency is greater than the first operating frequency;

[0093] It is determined that the air conditioner is running at the second operating frequency, and if it is detected that the indoor ambient temperature is in the second interval, the air conditioner is adjusted to run at the first operating frequency.

[0094] In some possible implementations, the second operating frequency is the maximum frequency at which the air conditioner can operate within the temperature range. First, the air conditioner is set to operate at the second operating frequency to quickly reduce the indoor ambient temperature until it reaches a temperature lower than the comfortable temperature, and then the air conditioner is adjusted to operate at the first operating frequency (during cooling). It should be noted that determining that the air conditioner operates at the second operating frequency is the first stage of the control process in this application.

[0095] Optionally, in one embodiment of the present invention, the method further comprises:

[0096] If it is detected that the indoor ambient temperature is in the third interval, return to the step of determining that the air conditioner is operating at the second operating frequency; wherein, if the air conditioner is in cooling operation, the minimum value of the third interval is greater than or equal to the maximum value of the first interval; if the air conditioner is in heating operation, the maximum value of the third interval is less than or equal to the minimum value of the first interval.

[0097] In some possible implementations, at any time, if the indoor ambient temperature is detected to be in the third interval, for example, for cooling operation, the third interval is on the right side of the first interval, that is, the temperature is much higher than the comfort temperature, and the air conditioner is adjusted to run at the second operating frequency to quickly reduce the indoor temperature; similarly, for heating operation, the third interval is on the left side of the first interval, that is, the temperature is much lower than the comfort temperature, and the air conditioner is adjusted to run at the second operating frequency to quickly increase the indoor temperature. It can be understood that the first interval, the second interval, and the third interval in this application are all temperature division intervals.

[0098] It can be understood that the operating frequency in the above embodiment is the operating frequency of the indoor unit of the air conditioner, and those skilled in the art can linearly adjust the operating frequency of the outdoor unit according to the above second operating frequency, first operating frequency and third operating frequency.

[0099] The frequency conversion control method provided by the present application is described in detail below with specific embodiments:

[0100] In combination with user needs, three energy-saving setting temperatures are set to be adjustable, illustratively, 27, 26, and 25°C, and the setting selection is made on the remote control, with the first selection being 26°C. Of course, those skilled in the art can set the number of adjustable temperatures and the specific temperature value in each case according to actual needs, and this application does not make specific limitations.

[0101] Refrigeration operation:

[0102] The specific operation rules of the first stage are as follows: max (ie, the second operating frequency in the present application), controls the air conditioner to perform rapid cooling (or rapid heating) at the maximum frequency in the range where the outdoor temperature is located.

[0103] The second stage is the low-frequency continuous energy-saving operation stage, which is also the temperature rise (or temperature drop) speed (temperature change speed) calculation stage. The total operation time of the temperature rise (or temperature drop) speed (temperature change speed) calculation stage is Time2. The temperature rise (or temperature drop) speed is calculated once every t5 time interval. The total operation time is divided by the set interval time = Time2 / t5 = m, so it can be divided into m temperature rise (or temperature drop) speeds; the indoor environment temperature reaches the initial set temperature T a_2-0 ; The indoor ambient temperature after interval t5 is T a_2-1 , the temperature accuracy is 0.5℃, and the temperature rise (or temperature drop) rate is T speed =(T a_2-1 -T a_2-0 ) / t5, each stage The average speed of the whole process (i.e. the first change speed in this application) is T speedm_avg =average(T speed1 :T speedm ). Of course, in other embodiments, the change amount in each stage may be weighted and summed to obtain the first change speed.

[0104] The third stage is based on the average cooling rate T speedm_avg Adjust the air conditioner transition frequency according to the change range of the average temperature rise (or temperature drop) speed. For example, the temperature rise (or temperature drop) change range can be divided according to -C, -B, -A, 0, A, B, C; where 0<A<B<C is from small to large. It can be understood that the temperature rise (or temperature drop) speed range can also be divided into more ranges, and the specific value is combined with the building load and the air conditioner low frequency F min1 The cooling capacity (or heating capacity) setting is determined based on the actual installation conditions and the indoor and outdoor temperature tests.

[0105] By T speedm_avg (i.e., the first change speed in this application) determines the additional value (i.e., the difference in this application) of the transition frequency (i.e., the third operating frequency) in the change interval:

[0106] During cooling operation:

[0107] 1) When -C ≤ T speedm_avg ≤-B, transition frequency F min2 =F min1 -X3;

[0108] 2) When -B≤T speedm_avg ≤-A, transition frequency F min2 =F min1 -X2;

[0109] 3) When -A≤T speedm_avg ≤0, transition frequency F min2=F min1 -X1;

[0110] 4) When 0≤T speedm_avg ≤A, transition frequency F min2 =F min1 +X1;

[0111] 5) When A≤T speedm_avg ≤B, transition frequency F min2 =F min1 +X2;

[0112] 6) When B≤T speedm_avg ≤C, transition frequency F min2 =F min1 +X3.

[0113] During heating operation:

[0114] 1) When -C ≤ T speedm_avg ≤-B, transition frequency F min2 =F min1 +X3;

[0115] 2) When -B≤T speedm_avg ≤-A, transition frequency F min2 =F min1 +X2;

[0116] 3) When -A≤T speedm_avg ≤0, transition frequency F min2 =F min1 +X1;

[0117] 4) When 0≤T speedm_avg ≤A, transition frequency F min2 =F min1 -X1;

[0118] 5) When A≤T speedm_avg ≤B, transition frequency F min2 =F min1 -X2;

[0119] 6) When B≤T speedm_avg ≤C, transition frequency F min2 =F min1 -X3.

[0120] Among them, 0<X1<X2<X3.

[0121] The fourth stage is the low-frequency continuous energy-saving operation stage. min2 Reach indoor ambient temperature ≤ set temperature T a -△T1(or set temperature T a +△T1≤indoor ambient temperature), control the air conditioner by pressing Fmin1 Perform low-frequency continuous energy-saving operation.

[0122] By combining the above control methods, the indoor temperature can quickly reach the set temperature, and the air conditioner is controlled to run near the lower frequency limit for most of the time. The room temperature is maintained stable by continuously calculating the temperature change rate and performing low-frequency fuzzy control.

[0123] The control of the speed of the indoor and outdoor units and the setting of the air guide angle of the indoor unit are designed in combination with the needs of room energy saving and comfort. The specific implementation details are not explained here.

[0124] More specifically, refer to Figure 4 As shown, the air conditioner performs continuous cooling and energy-saving operation:

[0125] After receiving the command, the air conditioner can operate at the maximum frequency (i.e., the second operating frequency in this application) F in combination with the outdoor temperature range. max , the air conditioner enters the first stage of operation, and the set temperature is the default temperature T a =26℃, control the air conditioner according to the maximum frequency F in the outdoor temperature range max Execute quick cooling. After the air conditioner runs for a period of time t1 in the first stage, when the indoor ambient temperature ≤ the set temperature T a -△T1, take △T1=2℃, that is, when the indoor ambient temperature is ≤24℃, control the air conditioner to enter the second stage.

[0126] After the air conditioner enters the second stage, the minimum operating frequency (i.e., the first operating frequency in this application) F min , control the air conditioner according to the minimum frequency F of the outdoor ambient temperature range min , the outdoor fan speed Fanspeed1 is set at a low speed, such as Fanspeed1 = 500rpm, that is, the indoor fan speed is set at a low speed of 500rpm to perform energy-saving cooling operation, and the air conditioner operates in the second stage within the set temperature T a -△T1≤Indoor ambient temperature<Set temperature T a +△T2, during this process, the air conditioner is operated at the minimum frequency F min Execute, calculate the indoor ambient temperature change rate every t5 time, such as T speed1 =(T a_2-1 -24) / t5, when the indoor temperature continues to drop, the fan speed is reduced by one level at a time until the fan speed reaches the lower limit. When the indoor ambient temperature starts to rise, when the indoor ambient temperature ≥ the set temperature T a +△T2, take △T2=3℃, that is, when the indoor ambient temperature ≥29℃, control the air conditioner to enter the third stage. At this time, calculate the final change speed of the indoor ambient temperature in the second stage as Get the average temperature rise rate of the indoor ambient temperature during the second stage of the air conditioner operation

[0127] After the air conditioner enters the third stage, the average temperature rise rate of the indoor ambient temperature in the second stage Combined with the set additional value of the indoor ambient temperature change speed interval, perform the transition frequency calculation operation, such as T speedm_avg =5, the additional value of compressor over-frequency is 4Hz, then the air conditioner is controlled by F min2 =F min1 +4Hz operation, and calculate the indoor ambient temperature change rate every t5 time, and adjust the compressor frequency in combination with the frequency additional value corresponding to the temperature change rate interval. When the indoor ambient temperature change rate approaches zero, that is, the indoor ambient temperature is no longer rising, the air conditioner compressor frequency is controlled to be adjusted according to the last frequency additional value to reduce the indoor ambient temperature. When the indoor ambient temperature ≤ the set temperature T a -△T1, take △T1=2℃, that is, when the indoor ambient temperature is ≤24℃, control the air conditioner to enter the fourth stage.

[0128] The air conditioner enters the fourth stage. The fourth stage is controlled in the same way as the second stage. During this process, the minimum frequency F min Execute, when the indoor ambient temperature ≥ set temperature T a +△T2, control the air conditioner to enter the third stage, and calculate the average temperature change rate of the indoor ambient temperature in the second stage.

[0129] During the continuous energy-saving operation of refrigeration, if the indoor ambient temperature during the above stages is ≥ the set temperature T a +△T3, that is, controlling the air conditioner to enter the first stage of rapid cooling operation mode, and then cyclically operate according to the above four stages.

[0130] On the premise of meeting the requirements of rapid cooling (or rapid heating) and comfort, the air conditioner basically maintains low-frequency operation after the indoor ambient temperature reaches the set temperature. After 8 hours of continuous energy-saving operation, the power consumption of the air conditioner is significantly reduced. The air conditioner is more energy-efficient while meeting the comfort requirements.

[0131] In summary, the method provided by the embodiment of the present application includes: obtaining the outdoor ambient temperature, and determining the first operating frequency according to the temperature interval in which the outdoor ambient temperature is located; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature interval; adjusting the air conditioner to operate at the first operating frequency; if it is detected that the indoor ambient temperature is in the first interval, adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second interval, and returning to the step of adjusting the air conditioner to operate at the first operating frequency; wherein, if the air conditioner is in cooling operation, the values ​​in the second interval are all less than the values ​​in the first interval; if the air conditioner is in heating operation, the values ​​in the second interval are all greater than the values ​​in the first interval. The embodiment of the present application determines the minimum operating frequency through the temperature interval in which the indoor ambient temperature is located, so that the air conditioner works at the most suitable frequency lower limit, which is conducive to reducing energy consumption; at the same time, when the indoor ambient temperature is in the first interval, the embodiment of the present application adjusts the operating frequency of the air conditioner through the first change rate of the indoor ambient temperature, which alleviates the problem of a substantial increase in the standby operating temperature and is conducive to improving the accuracy of temperature control. Therefore, the embodiment of the present application is conducive to alleviating the problem of high energy consumption of the air conditioner and improving the accuracy of temperature control.

[0132] Secondly, refer to the attached Figure 5 A variable frequency control system proposed according to an embodiment of the present invention is described.

[0133] Figure 5 1 is a schematic diagram of the structure of a frequency conversion control system according to an embodiment of the present invention. The system specifically comprises:

[0134] The first module 510 is used to obtain the outdoor ambient temperature and determine the first operating frequency according to the temperature range of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature range;

[0135] The second module 520 is used to adjust the air conditioner to operate at a first operating frequency;

[0136] The third module 530 is used to adjust the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second range if it is detected that the indoor ambient temperature is in the first range, and is connected to the second module; wherein, if the air conditioner is in cooling operation, the values ​​in the second range are all smaller than the values ​​in the first range; if the air conditioner is in heating operation, the values ​​in the second range are all larger than the values ​​in the first range.

[0137] It can be seen that the contents of the above method embodiments are all applicable to the present system embodiments, the functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0138] Reference Figure 6, an embodiment of the present invention provides an air conditioner, comprising:

[0139] at least one processor 410;

[0140] At least one memory 420, used to store at least one program;

[0141] When the at least one program is executed by the at least one processor 410, the at least one processor 410 implements the frequency conversion control method.

[0142] Similarly, the contents of the above method embodiments are all applicable to the present air conditioner embodiment. The functions specifically implemented by the present air conditioner embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0143] An embodiment of the present invention further provides a computer-readable storage medium, in which a program executable by a processor is stored. The program executable by the processor is used to execute the above-mentioned frequency conversion control method when executed by the processor.

[0144] Similarly, the contents of the above method embodiments are all applicable to the present storage medium embodiments. The functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0145] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0146] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present invention. More specifically, in view of the properties, functions and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional skills of the engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0147] If the functions are implemented in the form of software functional units and sold or used as independent products, they 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 the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several programs to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0148] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable programs for implementing the logical functions, and may be embodied in any computer-readable medium for use by a program execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch and execute a program from a program execution system, device or apparatus), or in conjunction with such program execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by a program execution system, device or apparatus, or in conjunction with such program execution systems, devices or apparatuses.

[0149] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0150] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0151] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0152] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0153] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A frequency conversion control method, characterized in that: The following steps are involved: Acquire the outdoor ambient temperature, and determine a first operating frequency according to the temperature range of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature range; adjusting the air conditioner to operate at the first operating frequency; If it is detected that the indoor ambient temperature is in the first interval, the operating frequency of the air conditioner is adjusted according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second interval, and the process returns to the step of adjusting the air conditioner to operate at the first operating frequency; wherein, if the air conditioner is in cooling operation, the values ​​in the second interval are all smaller than the values ​​in the first interval; if the air conditioner is in heating operation, the values ​​in the second interval are all larger than the values ​​in the first interval.

2. The frequency conversion control method according to claim 1, characterized in that: If it is detected that the indoor ambient temperature is in the first range, adjusting the operating frequency of the air conditioner according to a first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second range includes: Acquire a first change rate of the indoor ambient temperature, and if it is detected that the indoor ambient temperature is in a first interval, determine a third operating frequency according to the first change rate, and adjust the air conditioner to operate at the third operating frequency; The first change speed and the third operating frequency are continuously detected and updated, and the air conditioner is adjusted to operate at the updated third operating frequency until it is detected that the indoor ambient temperature is in the second interval.

3. The frequency conversion control method according to claim 1, characterized in that: The step of adjusting the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature includes: Acquire several first ambient temperatures in the room in the previous time period, and determine the temperature difference according to the first ambient temperatures; the first ambient temperatures are the temperatures at both ends of a preset time interval; Determining a first change speed according to the temperature difference and the preset time interval; determining a difference value according to a change interval in which the first change speed is located; A third operating frequency is determined according to the first operating frequency and the difference, and the air conditioner is adjusted to operate at the third operating frequency.

4. The frequency conversion control method according to claim 3, characterized in that: The determining the difference according to the change interval in which the first change speed is located includes: If the air conditioner is in cooling operation and the first change speed is in a first change interval, determining a first difference; Alternatively, if the air conditioner is in cooling operation and the first change speed is in a second change interval, determining a second difference; Among them, if the values ​​in the first change interval and the second change interval are both greater than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the second difference is less than the first difference, and the second difference is greater than zero; if the values ​​in the first change interval and the second change interval are both less than or equal to zero, and the values ​​in the first change interval are both greater than the values ​​in the second change interval, the first difference is greater than the second difference, and the first difference is less than zero.

5. The frequency conversion control method according to claim 2, characterized in that: The continuously detecting and updating the first change speed and the third operating frequency, and adjusting the air conditioner to operate at the updated third operating frequency until it is detected that the indoor ambient temperature is in the second interval, includes: The first change speed and the third operating frequency are continuously detected and updated. If the first change speed determined at the current moment is the preset change speed, the air conditioner is kept running at the third operating frequency at the current moment until it is detected that the indoor ambient temperature is in the second interval.

6. The frequency conversion control method according to claim 1, characterized in that: Before adjusting the air conditioner to operate at the first operating frequency, the method further includes: Determining a second operating frequency according to the temperature range; the second operating frequency is greater than the first operating frequency; It is determined that the air conditioner is running at the second operating frequency, and if it is detected that the indoor ambient temperature is in the second interval, the air conditioner is adjusted to run at the first operating frequency.

7. The frequency conversion control method according to claim 6, characterized in that: The method further comprises: If it is detected that the indoor ambient temperature is in the third interval, return to the step of determining that the air conditioner is operating at the second operating frequency; wherein, if the air conditioner is in cooling operation, the minimum value of the third interval is greater than or equal to the maximum value of the first interval; if the air conditioner is in heating operation, the maximum value of the third interval is less than or equal to the minimum value of the first interval.

8. A variable frequency control system, characterized in that: include: The first module is used to obtain the outdoor ambient temperature and determine the first operating frequency according to the temperature range of the outdoor ambient temperature; wherein the first operating frequency is the minimum frequency at which the air conditioner can operate within the temperature range; A second module is used to adjust the air conditioner to operate at the first operating frequency; The third module is used to adjust the operating frequency of the air conditioner according to the first change rate of the indoor ambient temperature until the indoor ambient temperature is in the second range if it is detected that the indoor ambient temperature is in the first range, and is connected to the second module; wherein, if the air conditioner is in cooling operation, the values ​​in the second range are all smaller than the values ​​in the first range; if the air conditioner is in heating operation, the values ​​in the second range are all larger than the values ​​in the first range.

9. An air conditioner, characterized in that: include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the frequency conversion control method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to implement the frequency conversion control method according to any one of claims 1 to 7 when executed by the processor.

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