Air conditioner frequency control method, device and system and air conditioner

Abstract

The invention discloses an air conditioner frequency control method, device and system and an air conditioner, and belongs to the field of air conditioners. When the current frequency is close to the upper limit value of the current frequency interval, whether the change trend of the predicted environment temperature is consistent with the change trend of the actual environment temperature or not is judged firstly, if yes, it is indicated that the predicted environment temperature is accurate, and therefore the target frequency interval of the air conditioner compressor is determined according to the target predicted environment temperature at the moment. As the target predicted environment temperature is the predicted environment temperature, compared with the actual environment temperature, when the frequency of the compressor is controlled, hysteresis does not exist, excessive energy cannot be consumed, fluctuation of the room temperature cannot be caused, changes of extreme weather can be coped with in time, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular, to an air conditioning frequency control method, device, system and air conditioner. Background Art

[0002] With the rapid development of artificial intelligence technology, the frequent occurrence of extreme weather problems, and society's need for energy-saving technologies, existing air-conditioning control solutions can no longer meet people's demand for air-conditioning that is both intelligent and energy-saving.

[0003] The frequency of traditional air-conditioning compressors is controlled within the corresponding range according to the changes in ambient temperature, and has a certain lag. For example, when the ambient temperature rises during heating, the frequency is increased to maintain the indoor environment unchanged, which consumes more electricity and causes indoor temperature fluctuations. It is not smart enough, and it consumes energy, which will also cause room temperature fluctuations and make it difficult to cope with extreme weather. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present application provides an air conditioning frequency control method, device, system and air conditioner to solve the problem that the frequency of the traditional air conditioning compressor has a certain hysteresis in the control according to the change of ambient temperature, which consumes more electricity and causes indoor temperature fluctuations. It is not smart enough, energy-consuming, and causes room temperature fluctuations, and it is difficult to cope with the occurrence of extreme weather.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] In a first aspect, a method for controlling air conditioning frequency is provided, comprising:

[0007] When the difference between the first frequency and the current frequency is less than or equal to the first threshold, it is determined whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent, wherein the first frequency is the upper limit value of the current frequency interval of the compressor corresponding to the current temperature interval where the current actual ambient temperature is located;

[0008] If the predicted ambient temperature is consistent with the actual ambient temperature, the temperature difference between the current predicted ambient temperature and the current actual ambient temperature is obtained;

[0009] Acquire the predicted ambient temperature after the first preset time, and correct the predicted ambient temperature based on the temperature difference to obtain a target predicted ambient temperature;

[0010] A target frequency range of the compressor is determined based on the target predicted ambient temperature and the current operation mode, and the compressor frequency is controlled to operate within the target frequency range.

[0011] Further, determining the target frequency range of the compressor based on the target predicted ambient temperature and the current operating mode includes:

[0012] When the current operation mode is heating mode:

[0013] If the target predicted ambient temperature is greater than or equal to the first temperature, the target frequency interval is the current frequency interval, and the first temperature is the lower limit of the current temperature interval;

[0014] If the difference between the first temperature and the target predicted ambient temperature is greater than 0 and less than or equal to a second threshold, the lower limit value of the target frequency interval is the lower limit value of the current frequency interval, and the upper limit value of the target frequency interval is the sum of the first frequency and a third threshold;

[0015] If the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the second frequency, and the second frequency is greater than the first frequency.

[0016] Furthermore, it also includes:

[0017] When the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, determining the second frequency based on the difference between the first temperature and the target predicted ambient temperature;

[0018] The greater the difference between the first temperature and the target predicted ambient temperature, the greater the value of the second frequency.

[0019] Further, determining the target frequency range of the compressor based on the target predicted ambient temperature and the current operating mode includes:

[0020] When the current operating mode is cooling mode:

[0021] If the target predicted ambient temperature is less than or equal to the second temperature, the target frequency interval is the current frequency interval; the second temperature is the upper limit of the current temperature interval;

[0022] If the difference between the target predicted ambient temperature and the second temperature is less than a fourth threshold value and greater than or equal to 0, the lower limit value of the target frequency interval is the lower limit value of the current frequency interval, and the upper limit value of the target frequency interval is the sum of the first frequency and the fifth threshold value;

[0023] If the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the third frequency, and the third frequency is greater than the first frequency.

[0024] Furthermore, it also includes:

[0025] When the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, determining the third frequency based on the difference between the target predicted ambient temperature and the second temperature;

[0026] Among them, the greater the difference between the target predicted ambient temperature and the second temperature, the greater the value of the third frequency.

[0027] Further, obtaining the target predicted ambient temperature includes:

[0028] Obtaining the predicted ambient temperature after a first preset time period;

[0029] The predicted ambient temperature is used as the target predicted ambient temperature, or the sum of the predicted ambient temperature and the temperature difference is used as the target predicted ambient temperature, where the temperature difference is the difference between the current predicted ambient temperature and the current actual ambient temperature.

[0030] Further, the determining whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent includes:

[0031] Get weather forecast data and real-time ambient temperature;

[0032] Constructing a first function for predicting the change of ambient temperature over time based on the preset weather data; and constructing a second function for predicting the change of ambient temperature over time based on the real-time ambient temperature;

[0033] Deriving the first function and the second function respectively to obtain a first derivative function and a second derivative function;

[0034] If the absolute value of the difference between the first derivative function and the second derivative function is less than a threshold, it is determined that the change trend of the predicted ambient temperature is consistent with the actual ambient temperature.

[0035] Furthermore, it also includes:

[0036] If the difference between the first frequency and the current frequency is greater than the first threshold, or if the change trends of the predicted ambient temperature and the actual ambient temperature are inconsistent, determining the actual temperature interval in which the actual ambient temperature is located;

[0037] The actual frequency interval corresponding to the actual temperature interval is used as the target frequency interval, and the compressor frequency is controlled to operate within the target frequency interval.

[0038] Furthermore, it also includes:

[0039] After controlling the compressor frequency to operate in the target frequency interval for a second preset time period, re-determining the target frequency interval of the compressor.

[0040] In a second aspect, an air conditioner frequency control device is provided, comprising:

[0041] A change trend judgment module, used for judging whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent when the difference between the first frequency and the current frequency is less than or equal to a first threshold, wherein the first frequency is an upper limit value of a current frequency interval of the compressor corresponding to a current temperature interval where the current actual ambient temperature is located;

[0042] A temperature difference calculation module is used to obtain the temperature difference between the current predicted ambient temperature and the current actual ambient temperature if the change trend of the predicted ambient temperature is consistent with that of the actual ambient temperature;

[0043] A predicted temperature correction module, used to obtain the predicted ambient temperature after a first preset time period, and correct the predicted ambient temperature based on the temperature difference to obtain a target predicted ambient temperature;

[0044] The target frequency determination module is used to determine the target frequency range of the compressor based on the target predicted ambient temperature and the current operation mode, and control the compressor frequency to operate within the target frequency range.

[0045] In a third aspect, an air conditioning frequency control system is provided, comprising:

[0046] at least one processor and at least one memory;

[0047] The memory stores executable instructions of the processor;

[0048] The processor is configured to execute the above-mentioned air-conditioning frequency control method.

[0049] In a fourth aspect, an air conditioner is provided, applying the above-mentioned air conditioner frequency control method.

[0050] Beneficial effects:

[0051] The technical solution of the present application provides an air conditioning frequency control method, device, system and air conditioner. When the current frequency is close to the upper limit of the current frequency range, first determine whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent. If they are consistent, it means that the predicted ambient temperature is more accurate. Therefore, at this time, the target frequency range of the air conditioning compressor is determined according to the target predicted ambient temperature. Since the target predicted ambient temperature is the predicted ambient temperature, compared to using the actual ambient temperature, when controlling the frequency of the compressor, there is no lag, it will not consume too much energy, and it will not cause fluctuations in room temperature. It can respond to changes in extreme weather in a timely manner and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 is a flow chart of an air conditioning frequency control method provided in an embodiment of the present application;

[0054] Figure 2 This is a flow chart of a method for controlling a strong air conditioner mode provided in an embodiment of the present application;

[0055] Figure 3 This is a flow chart of a method for controlling air conditioning frequency in heating mode provided by an embodiment of the present application;

[0056] Figure 4 This is a flow chart of a method for controlling air conditioning frequency in cooling mode provided by an embodiment of the present application;

[0057] Figure 5 is a structural schematic diagram of an air-conditioning frequency control device provided in an embodiment of the present application;

[0058] Figure 6 It is a structural schematic diagram of an air conditioning frequency control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application is described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0060] Traditional air conditioning control is based on the ambient temperature (the ambient temperature mentioned in the embodiments of this application is the outdoor ambient temperature) to determine the temperature range in which the ambient temperature is located. Each temperature range corresponds to a frequency operating range of a compressor. Within this temperature range, the frequency of the compressor operates in the corresponding frequency operating range according to the set temperature and the indoor temperature. When the ambient temperature changes, it affects the indoor temperature change, and the compressor changes its operating frequency. However, this method will cause indoor temperature fluctuations, which will inevitably lead to a decline in user experience.

[0061] When the indoor temperature changes due to the ambient temperature, in order to provide users with a suitable indoor temperature as quickly as possible, the frequency of the compressor will be increased, which will not only cause indoor temperature fluctuations but also waste electricity.

[0062] Therefore, this application controls the compressor frequency in time according to the predicted ambient temperature and the actual ambient temperature of the unit, which not only saves energy but also better maintains a constant indoor temperature, bringing users a better user experience. In addition, it can also improve the ability of the air conditioner in extreme weather, providing users with more reliable heating / cooling guarantees in extreme weather. The details are as follows:

[0063] Reference Figure 1 , the embodiment of the present application provides an air conditioner frequency control method, comprising:

[0064] S11: When the difference between the first frequency and the current frequency is less than or equal to a first threshold, determine whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent, and the first frequency is the upper limit value of the current frequency range of the compressor corresponding to the current temperature range where the current actual ambient temperature is located.

[0065] Because when the difference between the first frequency and the current frequency is less than or equal to the first threshold, it means that the current frequency of the compressor is close to the upper limit of the current frequency range. If the ambient temperature changes due to the external weather changes, the subsequent compressor frequency may exceed the upper limit of the current frequency range. Therefore, the change trend judgment of the predicted ambient temperature and the actual ambient temperature is introduced at this time.

[0066] The introduction of the change trend judgment of the predicted ambient temperature and the actual ambient temperature is to ensure the accuracy of the predicted ambient temperature. If no judgment is made, if the predicted ambient temperature is inaccurate at this time, when the compressor is controlled according to the predicted ambient temperature, the control effect will be poor and will not meet the actual needs.

[0067] In addition, the embodiment of the present application determines the changing trend of the predicted ambient temperature and the changing trend of the actual ambient temperature, rather than whether the current predicted ambient temperature and the current actual ambient temperature are the same or the difference is equal to the preset difference, because the comparison of the current predicted ambient temperature and the current actual ambient temperature can only reflect the relationship between the predicted ambient temperature and the actual ambient temperature at the current moment, but cannot reflect the relationship between the predicted ambient temperature and the actual ambient temperature at subsequent moments, and the purpose of the present application is to control in advance according to the predicted ambient temperature, so the present application determines the changing trend of the predicted ambient temperature and the changing trend of the actual ambient temperature. At the same time, since the predicted ambient temperature in the present application is the regional ambient temperature obtained according to the weather forecast data, it may not be exactly the same as the actual ambient temperature where the air conditioner is located, resulting in the predicted ambient temperature and the actual ambient temperature always having the same difference, so if only the current predicted ambient temperature and the current actual ambient temperature are used for comparison, the actual situation cannot be reflected.

[0068] Therefore, in one embodiment of the present application, the changing trend of the predicted ambient temperature can be judged based on the data predicted by the prediction function (wherein the prediction function can be obtained based on weather forecast data, and the predictions of existing weather forecasts all adopt the prediction function, which can provide the temperature and weather conditions for each hour), that is, the historical predicted ambient temperature of a preset period before the current moment is obtained, and a first change curve is determined based on the historical predicted ambient temperature; then the historical actual ambient temperature within the preset period before the current time is obtained, and a second change curve is determined based on the historical actual ambient temperature. If the similarity between the first change curve and the second change curve is greater than a threshold value, it is judged that their changing trends are the same.

[0069] In another embodiment, weather forecast data and real-time ambient temperature are obtained; a first function for predicting the change of ambient temperature over time is constructed based on the preset weather data (the first function is the same as the above-mentioned prediction function acquisition method); and a second function for predicting the change of ambient temperature over time is constructed based on the real-time ambient temperature (the second function is fitted according to the actual ambient temperature); the first function and the second function are derived to obtain the first derivative function and the second derivative function respectively; if the absolute value of the difference between the first derivative function and the second derivative function is less than a threshold value, it is judged that the change trend of the predicted ambient temperature is consistent with that of the actual ambient temperature. By deriving the first function and the second function, their change can be obtained. When the first derivative function and the second derivative function have the same or similar current values, it means that their change trends are the same.

[0070] S12: If the predicted ambient temperature is consistent with the change trend of the actual ambient temperature, a target predicted ambient temperature is obtained, wherein the target predicted ambient temperature represents the ambient temperature after a period of time.

[0071] As a preferred implementation of the present application, taking the target predicted ambient temperature includes:

[0072] The predicted ambient temperature after the first preset time is obtained; and the predicted ambient temperature is used as the target predicted ambient temperature. However, since the predicted ambient temperature may not always be the same as the actual ambient temperature, there may be a certain difference between the predicted ambient temperature and the actual ambient temperature.

[0073] Therefore, as another preferred implementation of the embodiment of the present application, obtaining the target predicted ambient temperature includes:

[0074] Obtain the predicted ambient temperature after a first preset time period; and use the sum of the predicted ambient temperature and the temperature difference as the target predicted ambient temperature, wherein the temperature difference is the difference between the current predicted ambient temperature and the current actual ambient temperature.

[0075] S13: Determine a target frequency range of the compressor based on the target predicted ambient temperature and the current operation mode, and control the compressor frequency to operate within the target frequency range.

[0076] When the current operation mode is heating mode:

[0077] If the target predicted ambient temperature is greater than or equal to the first temperature, the target frequency interval is the current frequency interval, and the first temperature is the lower limit of the current temperature interval; when the target predicted ambient temperature is greater than or equal to the first temperature, it indicates that the predicted ambient temperature after the first preset time is still within the current temperature interval. Therefore, the target frequency interval is the current temperature interval.

[0078] If the difference between the first temperature and the target predicted ambient temperature is greater than 0 and less than or equal to the second threshold, the lower limit of the target frequency interval is the lower limit of the current frequency interval, and the upper limit of the target frequency interval is the sum of the first frequency and the third threshold; when the difference between the first temperature and the target predicted ambient temperature is greater than 0 and less than or equal to the second threshold, it means that the predicted ambient temperature after the first preset time is slightly lower than the current temperature interval, and therefore the upper limit of the target frequency interval slightly exceeds the first frequency.

[0079] If the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, the lower limit of the target frequency interval is greater than or equal to the first frequency, the upper limit of the target frequency interval is the second frequency, and the second frequency is greater than the first frequency. When the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, it means that the predicted ambient temperature after the first preset time is much lower than the current temperature interval, so the frequency of the compressor needs to be increased in advance, that is, the target frequency is at least the upper limit of the current frequency interval and at most the second frequency.

[0080] In one embodiment, the second frequency is set to a constant value.

[0081] In another embodiment, the second frequency is determined based on the difference between the first temperature and the target predicted ambient temperature; wherein, the greater the difference between the first temperature and the target predicted ambient temperature, the greater the value of the second frequency.

[0082] When the current operating mode is cooling mode:

[0083] If the target predicted ambient temperature is less than or equal to the second temperature, the target frequency range is the current frequency range; the second temperature is the upper limit value of the current temperature range; when the target predicted ambient temperature is less than or equal to the second temperature, it indicates that the ambient temperature after the first preset time is still within the current temperature range, so the target frequency range is the current frequency range at this time.

[0084] If the difference between the target predicted ambient temperature and the second temperature is less than the fourth threshold and greater than or equal to 0, the lower limit value of the target frequency interval is the lower limit value of the current frequency interval, and the upper limit value of the target frequency interval is the sum of the first frequency and the fifth threshold; when the difference between the target predicted ambient temperature and the second temperature is less than the fourth threshold and greater than or equal to 0, it means that the predicted ambient temperature after the first preset time period is slightly higher than the current temperature interval, so the upper limit value of the target frequency interval is higher than the upper limit value of the current frequency interval.

[0085] If the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, the lower limit of the target frequency interval is greater than or equal to the first frequency, the upper limit of the target frequency interval is the third frequency, and the third frequency is greater than the first frequency. When the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, it means that the predicted ambient temperature after the first preset time is much higher than the current temperature interval, so the frequency of the compressor needs to be increased, that is, the lower limit of the target frequency interval is at least the first frequency, and the upper limit is the third frequency.

[0086] In one embodiment, the third frequency is a constant value.

[0087] In another embodiment, the third frequency is determined based on the difference between the target predicted ambient temperature and the second temperature; wherein, the greater the difference between the target predicted ambient temperature and the second temperature, the greater the value of the third frequency.

[0088] It is understood that neither the second frequency nor the third frequency can exceed the maximum allowed frequency.

[0089] In addition, after the compressor frequency is controlled to run in the target frequency interval for a second preset time, the target frequency interval of the compressor is re-determined. That is, the target frequency interval of the compressor is re-determined every second preset time. The second preset time is greater than the first preset time.

[0090] As an optional implementation method of the embodiment of the present application, if the difference between the first frequency and the current frequency is greater than the first threshold, or if the change trend of the predicted ambient temperature is inconsistent with the actual ambient temperature, the actual temperature interval in which the actual ambient temperature is located is determined; the actual frequency interval corresponding to the actual temperature interval is used as the target frequency interval, and the compressor frequency is controlled to operate in the target frequency interval. That is, when it is not necessary or impossible to use the predicted ambient temperature to control the compressor frequency, the traditional actual ambient temperature is still used to control the compressor frequency.

[0091] The air conditioning frequency control method provided in the embodiment of the present application, when the current frequency is close to the upper limit of the current frequency range, first determines whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent. If they are consistent, it means that the predicted ambient temperature is relatively accurate. Therefore, at this time, the target frequency range of the air conditioning compressor is determined according to the target predicted ambient temperature. Since the target predicted ambient temperature is the predicted ambient temperature, compared with the actual ambient temperature, when controlling the frequency of the compressor, there is no hysteresis, no excessive energy consumption, and no fluctuations in room temperature. It can respond to changes in extreme weather in a timely manner and improve user experience.

[0092] In order to more clearly illustrate the solution of the present application, the present application provides a specific control method, in which the mode of controlling the ambient temperature according to target prediction is used as the strong mode, and the mode of normal control is used as the ordinary mode.

[0093] The present application requires that the air conditioner be able to receive the ambient temperature T of the real-time weather forecast data, as well as the real-time monitoring ambient temperature t of the air conditioner, and process the data to construct a function T=F(s) (i.e., the first function) of the predicted ambient temperature T changing with time s, and a function t=f(s) (i.e., the second function) of the real-time ambient temperature t changing with time s, and derive the two functions to obtain F'(s) (i.e., the first derivative function) and f'(s) (i.e., the second derivative function).

[0094] like Figure 2 As shown, the strong mode control method first obtains the air conditioning operation mode, and the heating mode is based on Figure 3 The cooling mode is controlled according to Figure 4 The process is controlled. If the conditions are met, the system enters the strong mode. If the conditions are not met, the system maintains the original normal mode. In the strong mode, it is necessary to determine whether the conditions meet the strong mode at regular intervals.

[0095] When heating, the control process is as follows Figure 3 In the traditional control method, the frequency of the compressor is controlled within the corresponding range as the ambient temperature changes, that is, the ambient temperature t∈[t a ,t b ], there will be a corresponding compressor frequency range H∈[H a ,H b ]. When t∈[t a ,t b ], and H is close to H b When (i.e. H≥H b -b, b is a small positive number, determined according to the actual control range and engineering experience), compare the sizes of F'(s) and f'(s) at this time, if F'(s)∈f'(s)±ξ (ξ is a very small positive number, determined according to experience), it is considered that the change trend of the weather forecast ambient temperature T is the same as the change trend of the actual monitored ambient temperature t, then record τ=f(s)-F(s) (ambient temperature correction value) at this time, read the predicted ambient temperature F(s1) at S1 i (adjustable according to the control accuracy requirements) minutes later, let T s1 =F(s1)+τ(corrected ambient temperature), determine t a ≤T s1 When H∈[H a ,H b ]; t a -a≤T s1 <t a When (a is a small positive number, determined according to the actual control range and engineering experience), control H∈[H a ,H b +b];T s1 <t a -a, the compressor frequency is controlled to enter the ambient temperature t∈[t0,t a ] corresponds to the compressor frequency H∈[H b ,H c ], all controls are in S after 2i minutes 2i Re-judge whether the control conditions are met.

[0096] When cooling, the control process is shown in Figure 4 In the traditional control method, the frequency of the compressor is controlled within the corresponding range as the ambient temperature changes, that is, the ambient temperature t∈[t a ,t b ], there will be a corresponding compressor frequency range H∈[H a ,H b ]. When t∈[t a ,t b ], and H is close to H b When (i.e. H≥H b-b, b is a small positive number, determined according to the actual control range and engineering experience), compare the sizes of F'(s) and f'(s) at this time, if F'(s)∈f'(s)±ξ(ξ is a very small positive number, determined according to experience), it is considered that the change trend of the weather forecast ambient temperature T is the same as the change trend of the actual monitored ambient temperature t, then record τ=f(s)-F(s) (ambient temperature correction value) at this time, read the predicted ambient temperature F(s1) at si after i (adjustable according to the control accuracy requirements), let T s1 =F(s1)+τ(corrected ambient temperature), determine T s1 ≤t b When H∈[H a ,H b ]; t b ≤T s1 <t b +b (b is a small positive number, determined according to the actual control range and engineering experience), control H∈[H a ,H b +b];t b +b<T s1 When the compressor frequency is controlled, the ambient temperature t∈[t b ,t c ] corresponds to the compressor frequency H∈[H b ,H c ], all controls are in S after 2i minutes 2i Re-judge whether the control conditions are met.

[0097] It should be noted that, although the same letters are used to represent certain parameters in cooling and heating in the embodiments of the present application, different values ​​may be used in practice.

[0098] The embodiment of the present application proposes a control method for timely controlling the compressor frequency according to the weather forecast temperature and the actual monitored temperature of the unit, which not only saves energy but also can better maintain a constant indoor temperature, bringing a better user experience to users.

[0099] Based on the same inventive concept, Figure 5 As shown, the present application also provides an air conditioning frequency control device 50, comprising:

[0100] A change trend judgment module 51 is used to judge whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent when the difference between the first frequency and the current frequency is less than or equal to a first threshold, wherein the first frequency is an upper limit value of a current frequency interval of the compressor corresponding to the current temperature interval where the current actual ambient temperature is located;

[0101] Among them, judging whether the change trend of the predicted ambient temperature is consistent with the actual ambient temperature includes:

[0102] Get weather forecast data and real-time ambient temperature;

[0103] Constructing a first function for predicting the change of ambient temperature over time based on the preset weather data; and constructing a second function for predicting the change of ambient temperature over time based on the real-time ambient temperature;

[0104] Deriving the first function and the second function respectively to obtain a first derivative function and a second derivative function;

[0105] If the absolute value of the difference between the first derivative function and the second derivative function is less than a threshold, it is determined that the change trend of the predicted ambient temperature is consistent with the actual ambient temperature.

[0106] A target temperature acquisition module 52 is used to acquire a target predicted ambient temperature if the predicted ambient temperature is consistent with the change trend of the actual ambient temperature;

[0107] Wherein, obtaining the target predicted ambient temperature includes:

[0108] Obtaining the predicted ambient temperature after a first preset time period;

[0109] The predicted ambient temperature is used as the target predicted ambient temperature, or the sum of the predicted ambient temperature and the temperature difference is used as the target predicted ambient temperature, where the temperature difference is the difference between the current predicted ambient temperature and the current actual ambient temperature.

[0110] The target frequency determination module 53 is used to determine the target frequency range of the compressor based on the target predicted ambient temperature and the current operation mode, and control the compressor frequency to operate within the target frequency range.

[0111] When the current operation mode is heating mode:

[0112] If the target predicted ambient temperature is greater than or equal to the first temperature, the target frequency interval is the current frequency interval, and the first temperature is the lower limit of the current temperature interval;

[0113] If the difference between the first temperature and the target predicted ambient temperature is greater than 0 and less than or equal to a second threshold, the lower limit value of the target frequency interval is the lower limit value of the current frequency interval, and the upper limit value of the target frequency interval is the sum of the first frequency and a third threshold;

[0114] If the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the second frequency, and the second frequency is greater than the first frequency.

[0115] Further, when the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, the second frequency is determined based on the difference between the first temperature and the target predicted ambient temperature;

[0116] The greater the difference between the first temperature and the target predicted ambient temperature, the greater the value of the second frequency.

[0117] When the current operating mode is cooling mode:

[0118] If the target predicted ambient temperature is less than or equal to the second temperature, the target frequency interval is the current frequency interval; the second temperature is the upper limit of the current temperature interval;

[0119] If the difference between the target predicted ambient temperature and the second temperature is less than a fourth threshold value and greater than or equal to 0, the lower limit value of the target frequency interval is the lower limit value of the current frequency interval, and the upper limit value of the target frequency interval is the sum of the first frequency and the fifth threshold value;

[0120] If the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the third frequency, and the third frequency is greater than the first frequency.

[0121] Further, when the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, the third frequency is determined based on the difference between the target predicted ambient temperature and the second temperature;

[0122] Among them, the greater the difference between the target predicted ambient temperature and the second temperature, the greater the value of the third frequency.

[0123] In addition, if the difference between the first frequency and the current frequency is greater than the first threshold, or if the change trends of the predicted ambient temperature and the actual ambient temperature are inconsistent, determining the actual temperature interval in which the actual ambient temperature is located;

[0124] The actual frequency interval corresponding to the actual temperature interval is used as the target frequency interval, and the compressor frequency is controlled to operate within the target frequency interval.

[0125] It should be noted that after the compressor frequency is controlled to run in the target frequency interval for a second preset time period, the target frequency interval of the compressor is re-determined.

[0126] The air conditioner frequency control device provided in the embodiment of the present application, when the current frequency is close to the upper limit value of the current frequency range, first determines whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent. If they are consistent, it means that the predicted ambient temperature is relatively accurate. Therefore, at this time, the target frequency range of the air conditioner compressor is determined according to the target predicted ambient temperature. Since the target predicted ambient temperature is the predicted ambient temperature, compared with the actual ambient temperature, when controlling the frequency of the compressor, there is no hysteresis, no excessive energy consumption, and no fluctuations in room temperature. It can respond to changes in extreme weather in a timely manner and improve user experience.

[0127] Based on the same inventive concept, Figure 6 As shown, the present application also provides an air conditioning frequency control system 60, including:

[0128] at least one processor 61 and at least one memory 62;

[0129] The memory stores executable instructions of the processor;

[0130] The processor is configured to execute the air conditioning frequency control method provided in the above embodiment.

[0131] The air conditioning frequency control system provided by the embodiment of the present application stores executable instructions of the processor in the memory. When the executable instructions are executed, the processor can first determine whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent when the current frequency is close to the upper limit of the current frequency range. If they are consistent, it means that the predicted ambient temperature is more accurate. Therefore, the target frequency range of the air conditioning compressor is determined according to the target predicted ambient temperature. Since the target predicted ambient temperature is the predicted ambient temperature, compared with the actual ambient temperature, when controlling the frequency of the compressor, there is no hysteresis, it will not consume too much energy, and it will not cause fluctuations in room temperature. It can respond to changes in extreme weather in a timely manner and improve user experience.

[0132] Based on the same inventive concept, the present application also provides an air conditioner, which applies the air conditioner frequency control method provided in the above embodiment.

[0133] The air conditioner provided in the embodiment of the present application, by applying the air conditioner frequency control method provided in the above embodiment, can first determine whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent when the current frequency is close to the upper limit value of the current frequency range. If they are consistent, it means that the predicted ambient temperature is relatively accurate. Therefore, at this time, the target frequency range of the air conditioner compressor is determined according to the target predicted ambient temperature. Since the target predicted ambient temperature is the predicted ambient temperature, compared with the actual ambient temperature, when controlling the frequency of the compressor, there is no hysteresis, no excessive energy consumption, and no fluctuations in the room temperature. It can respond to changes in extreme weather in a timely manner and improve user experience.

[0134] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0135] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

Claims

1. An air conditioning frequency control method, characterized in that: include: When the difference between the first frequency and the current frequency is less than or equal to a first threshold, determining whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent, the first frequency being the upper limit of the current frequency range of the compressor corresponding to the current temperature range in which the actual ambient temperature is located; If the predicted ambient temperature is consistent with the actual ambient temperature, the target predicted ambient temperature is obtained; A target frequency range of the compressor is determined based on the target predicted ambient temperature and the current operating mode, and the compressor frequency is controlled to operate within the target frequency range.

2. The method according to claim 1, wherein: The determining the target frequency range of the compressor based on the target predicted ambient temperature and the current operating mode includes: When the current operating mode is heating mode: If the target predicted ambient temperature is greater than or equal to the first temperature, the target frequency interval is the current frequency interval, and the first temperature is the lower limit of the current temperature interval; If the difference between the first temperature and the target predicted ambient temperature is greater than 0 and less than or equal to a second threshold, the lower limit of the target frequency interval is the lower limit of the current frequency interval, and the upper limit of the target frequency interval is the sum of the first frequency and a third threshold; If the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the second frequency, and the second frequency is greater than the first frequency.

3. The method according to claim 2, characterized in that Also includes: When the difference between the first temperature and the target predicted ambient temperature is greater than the second threshold, determining the second frequency based on the difference between the first temperature and the target predicted ambient temperature; The greater the difference between the first temperature and the target predicted ambient temperature, the greater the value of the second frequency.

4. The method according to claim 1, wherein: The determining the target frequency range of the compressor based on the target predicted ambient temperature and the current operating mode includes: When the current operating mode is cooling mode: If the target predicted ambient temperature is less than or equal to the second temperature, the target frequency interval is the current frequency interval; the second temperature is the upper limit of the current temperature interval; If the difference between the target predicted ambient temperature and the second temperature is less than a fourth threshold and greater than or equal to 0, the lower limit of the target frequency interval is the lower limit of the current frequency interval, and the upper limit of the target frequency interval is the sum of the first frequency and a fifth threshold; If the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, the lower limit of the target frequency range is greater than or equal to the first frequency, the upper limit of the target frequency range is the third frequency, and the third frequency is greater than the first frequency.

5. The method according to claim 4, characterized in that Also includes: When the difference between the target predicted ambient temperature and the second temperature is greater than or equal to the fourth threshold, determining the third frequency based on the difference between the target predicted ambient temperature and the second temperature; The greater the difference between the target predicted ambient temperature and the second temperature, the greater the value of the third frequency.

6. The method according to claim 1, wherein: The obtaining of the target predicted ambient temperature includes: Obtaining the predicted ambient temperature after a first preset time period; The predicted ambient temperature is used as the target predicted ambient temperature, or the sum of the predicted ambient temperature and the temperature difference is used as the target predicted ambient temperature, where the temperature difference is the difference between the current predicted ambient temperature and the current actual ambient temperature.

7. The method according to claim 1, wherein: The determining whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent includes: Get weather forecast data and real-time ambient temperature; Constructing a first function of predicted ambient temperature change over time based on the preset weather data; and constructing a second function of predicted ambient temperature change over time based on the real-time ambient temperature; Derivatives of the first function and the second function are respectively obtained to obtain a first derivative function and a second derivative function; If the absolute value of the difference between the first derivative function and the second derivative function is less than a threshold, it is determined that the change trend of the predicted ambient temperature is consistent with the change trend of the actual ambient temperature.

8. The method according to claim 1, characterized in that Also includes: If the difference between the first frequency and the current frequency is greater than the first threshold, or if the change trends of the predicted ambient temperature and the actual ambient temperature are inconsistent, determining the actual temperature range in which the actual ambient temperature is located; The actual frequency interval corresponding to the actual temperature interval is used as the target frequency interval, and the compressor frequency is controlled to operate within the target frequency interval.

9. The method according to claim 1, characterized in that Also includes: After controlling the compressor frequency to operate within the target frequency range for a second preset time period, re-determining the target frequency range of the compressor.

10. An air conditioner frequency control device, characterized in that: include: a change trend determination module, configured to determine whether the change trends of the predicted ambient temperature and the actual ambient temperature are consistent when a difference between a first frequency and a current frequency is less than or equal to a first threshold, wherein the first frequency is an upper limit value of a current frequency range of the compressor corresponding to a current temperature range in which the actual ambient temperature is located; a target temperature acquisition module, configured to acquire a target predicted ambient temperature if the predicted ambient temperature is consistent with the actual ambient temperature; A target frequency determination module is configured to determine a target frequency range of the compressor based on the target predicted ambient temperature and a current operating mode, and control the compressor frequency to operate within the target frequency range.

11. An air conditioning frequency control system, characterized in that: include: at least one processor and at least one memory; The memory stores executable instructions of the processor; The processor is configured to execute the method according to any one of claims 1 to 9.

12. An air conditioner, characterized in that: The method according to any one of claims 1 to 9 is used.

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