Air conditioner control methods and devices, air conditioners

Abstract

This invention discloses a control method and device for an air conditioner, and an air conditioner itself. The method includes: acquiring a first indoor ambient temperature of the room where the air conditioner is located while the air conditioner is operating in cooling mode; acquiring the inner pipe temperature of the indoor heat exchanger of the air conditioner when the first indoor ambient temperature and a set temperature are greater than or equal to a first temperature difference threshold; acquiring the dew point temperature of the room where the air conditioner is located when the inner pipe temperature is less than a preset inner pipe temperature; determining a second temperature difference between the dew point temperature and the inner pipe temperature; determining the operating mode of the air conditioner based on the relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold; and controlling the air conditioner to operate according to the operating mode. This invention solves the technical problem in related technologies where, to avoid freezing of the indoor heat exchanger fins, the decision to enter an anti-freeze mode is based solely on the indoor heat exchanger temperature, which can easily lead to false anti-freezing when there is no risk of freezing.

Description

Technical Field

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

[0002] When the air conditioner is in cooling mode, the indoor air is cooled by the indoor heat exchanger, and then the cooled air is sent to the room by the indoor fan.

[0003] To achieve rapid cooling, a higher cooling capacity is usually achieved by increasing the heat exchange temperature difference. Specifically, this is done by increasing the compressor frequency and work, which lowers the temperature of the refrigerant circulating to the indoor heat exchanger (and thus lowers the temperature of the indoor heat exchanger), thereby increasing the temperature difference between the indoor heat exchanger and the indoor air, and achieving a higher cooling capacity.

[0004] However, simply lowering the temperature of the indoor heat exchanger can lead to a "freezing" problem: when the surface temperature of the indoor heat exchanger is lower than the dew point temperature of the indoor air, water vapor in the indoor air precipitates and condenses on the surface of the heat exchanger, forming condensate. When the temperature of the indoor heat exchanger continues to drop to 0°C, the condensate on the surface of the heat exchanger condenses into frost or even ice, causing ice blockage of the heat exchanger fins, reducing heat exchange efficiency, affecting the indoor temperature reduction effect, and even causing reliability issues.

[0005] To avoid freezing issues, current air conditioners typically reduce the compressor's operating frequency or increase the indoor fan speed when the indoor heat exchanger temperature drops to a preset value, thus raising the indoor heat exchanger temperature. This method sacrifices cooling capacity by limiting the indoor heat exchanger temperature, resulting in a decrease in cooling efficiency. Furthermore, this method does not consider the different dew point temperatures of indoor air under varying humidity levels. When the relative humidity is low, the dew point temperature is low, and at a fixed preset indoor heat exchanger temperature, there may be instances where condensation does not occur. This causes the air conditioning system to operate at low frequency without the risk of freezing, leading to a poorer indoor temperature reduction effect.

[0006] To avoid freezing of the indoor heat exchange fins of the air conditioner, the above-mentioned technologies rely solely on the temperature of the indoor heat exchanger to determine whether to enter anti-freeze mode. This can easily lead to false anti-freeze measures being taken when there is no risk of freezing. Currently, no effective solution has been proposed. Summary of the Invention

[0007] This invention provides a control method and device for an air conditioner, and an air conditioner in order to at least solve the technical problem in the related art where, in order to avoid freezing of the indoor heat exchange fins of the air conditioner, the decision on whether to enter the anti-freeze mode is made solely based on the temperature of the indoor heat exchange fins, which can easily lead to false anti-freeze measures when there is no risk of freezing.

[0008] According to one aspect of the present invention, a control method for an air conditioner is provided, comprising: acquiring a first indoor ambient temperature of the room where the air conditioner is located during operation of the air conditioner in cooling mode; acquiring the inner pipe temperature of the indoor heat exchanger of the air conditioner when a first temperature difference between the first indoor ambient temperature and a set temperature is greater than or equal to a first temperature difference threshold, wherein the set temperature is a preset operating temperature of the air conditioner; acquiring the dew point temperature of the room where the air conditioner is located when the inner pipe temperature is less than a preset inner pipe temperature; determining a second temperature difference between the dew point temperature and the inner pipe temperature; determining an operating mode of the air conditioner based on the magnitude relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold, wherein the second temperature difference threshold is greater than the third temperature difference threshold; and controlling the air conditioner to operate according to the operating mode.

[0009] Optionally, the control method of the air conditioner further includes: when the first temperature difference is less than the first temperature difference threshold and the first temperature difference is greater than the second temperature difference threshold, controlling the air conditioner to operate according to the current operating mode, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

[0010] Optionally, the control method of the air conditioner further includes: when the first temperature difference is less than or equal to the second temperature difference threshold, obtaining the first operating frequency of the air conditioner's compressor; when the first operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate at the minimum operating frequency; when the first operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0011] Optionally, after controlling the current exhaust temperature to decrease at a predetermined rate, the control method of the air conditioner further includes: obtaining the current rotational speed of the indoor fan of the air conditioner; when the current rotational speed is not equal to the minimum rotational speed, controlling the indoor fan to decrease its rotational speed to the minimum rotational speed at a predetermined rate, and controlling the indoor fan to operate at the minimum rotational speed; when the current rotational speed is equal to the minimum rotational speed, controlling the air conditioner to operate according to the current operating mode.

[0012] Optionally, the control method of the air conditioner further includes: when the inner pipe temperature is greater than the preset inner pipe temperature, acquiring a second indoor ambient temperature and a third indoor ambient temperature of the room where the air conditioner is located, wherein the second indoor ambient temperature is the temperature acquired at the temperature acquisition time preceding the temperature acquisition time of the third indoor ambient temperature; determining the temperature drop rate from the second indoor ambient temperature to the third indoor ambient temperature; when the temperature drop rate is less than or equal to the preset temperature drop rate, acquiring a second operating frequency of the air conditioner's compressor; when the second operating frequency is not equal to the maximum operating frequency, controlling the compressor to increase its operating frequency to the maximum operating frequency according to a first preset frequency increase rate, and controlling the compressor to operate at the maximum operating frequency.

[0013] Optionally, the control method of the air conditioner further includes: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0014] Optionally, the control method of the air conditioner further includes: when the temperature drop rate is greater than the preset temperature drop rate, obtaining the third operating frequency of the air conditioner's compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to the second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0015] Optionally, the control method of the air conditioner further includes: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0016] Optionally, the control method of the air conditioner further includes: when the second temperature difference is greater than or equal to the second temperature difference threshold, obtaining the second operating frequency of the air conditioner's compressor; when the second operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its operating frequency to the highest operating frequency according to a first preset frequency increase rate, and controlling the compressor to operate at the highest operating frequency.

[0017] Optionally, the control method of the air conditioner further includes: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0018] Optionally, the control method of the air conditioner further includes: when the second temperature difference is less than the second temperature difference threshold and greater than 0, obtaining the third operating frequency of the air conditioner's compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to a second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0019] Optionally, the control method of the air conditioner further includes: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0020] Optionally, the control method of the air conditioner further includes: when the second temperature difference is greater than or equal to the third temperature difference threshold and less than or equal to 0, controlling the air conditioner to operate according to the current operating mode; when the second temperature difference is less than the third temperature difference threshold, if the temperature of the inner pipe is less than or equal to the freezing temperature of the indoor heat exchanger, obtaining the fourth operating frequency of the air conditioner's compressor; when the fourth operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate according to the minimum operating frequency; when the fourth operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0021] Optionally, after controlling the current exhaust temperature to decrease at a predetermined rate, the control method of the air conditioner further includes: obtaining the current rotational speed of the indoor fan of the air conditioner; when the current rotational speed is not equal to the maximum rotational speed, controlling the indoor fan to increase its rotational speed to the maximum rotational speed at a predetermined rate of increase, and controlling the indoor fan to operate at the maximum rotational speed; when the current rotational speed is equal to the maximum rotational speed, controlling the air conditioner to operate according to the current operating mode.

[0022] According to another aspect of the present invention, a control device for an air conditioner is also provided, comprising: a first acquisition unit, configured to acquire a first indoor ambient temperature of the room where the air conditioner is located during operation of the air conditioner in cooling mode; a second acquisition unit, configured to acquire the inner pipe temperature of the indoor heat exchanger of the air conditioner when a first temperature difference between the first indoor ambient temperature and a set temperature is greater than or equal to a first temperature difference threshold, wherein the set temperature is a preset operating temperature of the air conditioner; a third acquisition unit, configured to acquire the dew point temperature of the room where the air conditioner is located when the inner pipe temperature is less than a preset inner pipe temperature; a first determination unit, configured to determine a second temperature difference between the dew point temperature and the inner pipe temperature; a second determination unit, configured to determine an operating mode of the air conditioner based on the magnitude relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold, wherein the second temperature difference threshold is greater than the third temperature difference threshold; and a control unit, configured to control the air conditioner to operate according to the operating mode.

[0023] Optionally, the control device of the air conditioner further includes: the control unit, which is used to control the air conditioner to operate according to the current operating mode when the first temperature difference is less than the first temperature difference threshold and the first temperature difference is greater than the second temperature difference threshold, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

[0024] Optionally, the control device of the air conditioner further includes: a fourth acquisition unit, configured to acquire a first operating frequency of the air conditioner's compressor when the first temperature difference is less than or equal to the second temperature difference threshold; the control unit, configured to control the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate when the first operating frequency is not equal to the minimum operating frequency, and to control the compressor to operate at the minimum operating frequency; the control unit, configured to acquire the current exhaust temperature of the compressor when the first operating frequency is equal to the minimum operating frequency, and to control the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0025] Optionally, the control device of the air conditioner further includes: a fifth acquisition unit, configured to acquire the current speed of the indoor fan of the air conditioner after controlling the current exhaust temperature to decrease at a second predetermined rate; the control unit, configured to control the indoor fan to decrease its speed to the minimum speed at a predetermined rate when the current speed is not equal to the minimum speed, and to control the indoor fan to operate at the minimum speed; the control unit, configured to control the air conditioner to operate according to the current operating mode when the current speed is equal to the minimum speed.

[0026] Optionally, the control device of the air conditioner further includes: a sixth acquisition unit, configured to acquire a second indoor ambient temperature and a third indoor ambient temperature of the room where the air conditioner is located when the inner pipe temperature is greater than the preset temperature of the inner pipe, wherein the second indoor ambient temperature is the temperature acquired at the temperature acquisition time preceding the temperature acquisition time of the third indoor ambient temperature; a third determination unit, configured to determine the temperature drop rate from the second indoor ambient temperature to the third indoor ambient temperature; a seventh acquisition unit, configured to acquire a second operating frequency of the air conditioner's compressor when the temperature drop rate is less than or equal to a preset temperature drop rate; and the control unit, when the second operating frequency is not equal to the maximum operating frequency, controls the compressor to increase its operating frequency to the maximum operating frequency according to a first preset frequency increase rate, and controls the compressor to operate at the maximum operating frequency.

[0027] Optionally, the control device of the air conditioner further includes: an eighth acquisition unit, configured to acquire the current exhaust temperature of the compressor when the second operating frequency is equal to the highest operating frequency; if the current exhaust temperature is equal to the highest exhaust temperature, the control unit controls the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, the control unit controls the current exhaust temperature to rise to the highest exhaust temperature at a first predetermined temperature rise rate.

[0028] Optionally, the control device of the air conditioner further includes: a ninth acquisition unit, configured to acquire the third operating frequency of the air conditioner's compressor when the temperature drop rate is greater than the preset temperature drop rate; and the control unit, configured to control the compressor to increase its frequency to the maximum operating frequency according to a second preset frequency increase rate, or to increase the third operating frequency by a predetermined frequency, when the third operating frequency is not equal to the maximum operating frequency.

[0029] Optionally, the control device of the air conditioner further includes: a tenth acquisition unit, configured to acquire the current exhaust temperature of the compressor when the third operating frequency is equal to the highest operating frequency; the control unit, configured to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the highest exhaust temperature; and the control unit, configured to control the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or to increase the current exhaust temperature by a predetermined temperature, if the current exhaust temperature is not equal to the highest exhaust temperature.

[0030] Optionally, the control device of the air conditioner further includes: an eleventh acquisition unit, configured to acquire the second operating frequency of the air conditioner's compressor when the second temperature difference is greater than or equal to the second temperature difference threshold; and the control unit, configured to control the compressor to increase its operating frequency to the highest operating frequency according to a first preset frequency increase rate when the second operating frequency is not equal to the highest operating frequency, and to control the compressor to operate at the highest operating frequency.

[0031] Optionally, the control device of the air conditioner further includes: a twelfth acquisition unit, configured to acquire the current exhaust temperature of the compressor when the second operating frequency is equal to the highest operating frequency; the control unit, configured to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the highest exhaust temperature; and the control unit, configured to control the current exhaust temperature to rise to the highest exhaust temperature at a first predetermined temperature rise rate if the current exhaust temperature is not equal to the highest exhaust temperature.

[0032] Optionally, the control device of the air conditioner further includes: a thirteenth acquisition unit, used to acquire the third operating frequency of the air conditioner's compressor when the second temperature difference is less than the second temperature difference threshold and greater than 0; and the control unit, used to control the compressor to increase its frequency to the highest operating frequency according to a second preset frequency increase rate, or to increase the third operating frequency by a predetermined frequency, when the third operating frequency is not equal to the highest operating frequency.

[0033] Optionally, the control device of the air conditioner further includes: a fourteenth acquisition unit, configured to acquire the current exhaust temperature of the compressor when the third operating frequency is equal to the highest operating frequency; the control unit, configured to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the highest exhaust temperature; the control unit is further configured to control the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or to increase the current exhaust temperature by a predetermined temperature, if the current exhaust temperature is not equal to the highest exhaust temperature.

[0034] Optionally, the control device of the air conditioner further includes: the control unit, configured to control the air conditioner to operate according to the current operating mode when the second temperature difference is greater than or equal to the third temperature difference threshold and less than or equal to 0; the fifteenth acquisition unit, configured to acquire the fourth operating frequency of the air conditioner's compressor when the second temperature difference is less than the third temperature difference threshold and the inner pipe temperature is less than or equal to the freezing temperature of the indoor heat exchanger; the control unit, configured to control the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate when the fourth operating frequency is not equal to the minimum operating frequency, and to control the compressor to operate at the minimum operating frequency; the control unit, configured to acquire the current exhaust temperature of the compressor when the fourth operating frequency is equal to the minimum operating frequency, and to control the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0035] Optionally, the control device of the air conditioner further includes: a sixteenth acquisition unit, configured to acquire the current rotational speed of the indoor fan of the air conditioner after controlling the current exhaust temperature to decrease at a second predetermined rate; the control unit, configured to control the indoor fan to increase its rotational speed to the maximum speed at a predetermined rate when the current rotational speed is not equal to the maximum rotational speed, and to control the indoor fan to operate at the maximum rotational speed; the control unit, configured to control the air conditioner to operate according to the current operating mode when the current rotational speed is equal to the maximum rotational speed.

[0036] According to another aspect of the present invention, an air conditioner is also provided, wherein the air conditioner uses the control method of any one of the above-described air conditioners.

[0037] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method of the air conditioner described in any one of the above embodiments.

[0038] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes the control method for an air conditioner as described in any of the above embodiments.

[0039] In this embodiment of the invention, during the operation of the air conditioner in cooling mode, the first indoor ambient temperature of the room where the air conditioner is located can be obtained; when the first temperature difference between the first indoor ambient temperature and the set temperature is greater than or equal to a first temperature difference threshold, the inner pipe temperature of the indoor heat exchanger of the air conditioner can be obtained; when the inner pipe temperature is less than the preset inner pipe temperature, the dew point temperature of the room where the air conditioner is located can be obtained; a second temperature difference between the dew point temperature and the inner pipe temperature can be determined; based on the relationship between the second temperature difference and the second temperature difference threshold and the third temperature difference threshold, the operating mode of the air conditioner can be determined; and the air conditioner can be controlled to operate according to the operating mode. This air conditioner's control method achieves the goal of confirming the current operating status by detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, and the difference between the indoor air dew point temperature and the indoor heat exchanger temperature. It also performs precise anti-freeze processing by adjusting the air conditioner's operating model, making the control more reasonable and intelligent. This solves the problem of falsely preventing freezing when there is no risk of freezing, and further resolves the technical problem in related technologies where the determination of whether to enter the anti-freeze mode is based solely on the indoor heat exchanger temperature to avoid freezing of the air conditioner's indoor heat exchanger fins, which can easily lead to false freezing when there is no risk of freezing. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0041] Figure 1 This is a flowchart of an air conditioner control method according to an embodiment of the present invention;

[0042] Figure 2 This is a flowchart of an optional air conditioner control method according to an embodiment of the present invention;

[0043] Figure 3 This is a flowchart of the first control state according to an embodiment of the present invention;

[0044] Figure 4 This is a flowchart of the second control state according to an embodiment of the present invention;

[0045] Figure 5 This is a flowchart of the third control state according to an embodiment of the present invention;

[0046] Figure 6 This is a flowchart of the fourth control state according to an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of the control device of an air conditioner according to an embodiment of the present invention. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] For ease of understanding, the nouns or terms appearing in the embodiments of the present invention will be explained below.

[0051] T 内环 : Indoor ambient temperature, this value is the measured value, ℃.

[0052] T 设定 : The user's set temperature for the air conditioner, in °C.

[0053] ΔT1, ΔT2: Preset temperature difference between indoor ambient temperature and set temperature, in °C, where ΔT1 > ΔT2. If T 内环 -T 设定 If ΔT1 ≥ T, it indicates that the current indoor temperature differs significantly from the set temperature, and a rapid cooling process is needed; if ΔT1 > T 内环 -T 设定 If ΔT2 > T, it indicates that the current indoor temperature is close to the set temperature, and the current operating state can be maintained to continue cooling; if ΔT2 ≥ T 内环 -T 设定 This indicates that the current indoor temperature is close to the ambient temperature, allowing for low-power energy-saving operation. The value range is 0℃ to 10℃; one possible value is ΔT1 = 5℃ or ΔT2 = 2℃.

[0054] T 内管 : Indoor heat exchanger temperature, this value is the measured value, ℃.

[0055] T1 and T2: Preset temperatures of the indoor heat exchanger, in °C, where T1 > T2. When rapid cooling is required, T1 is measured. 内管 When T 内管 A value greater than T1 indicates that the current indoor heat exchanger temperature is high, with no risk of freezing, and can further enhance the heat exchange temperature difference, rapidly improving the cooling effect. When T1 ≥ T... 内管 ≥T2 indicates that the current indoor heat exchanger temperature is moderate, and the heat exchange temperature difference can be slightly increased to enhance the cooling effect. When T1>T 内管 This indicates that the current indoor heat exchanger temperature is too low, posing a risk of freezing, and further parameter collection is needed for assessment. The value range is 0℃~10℃; one possible value is T1=6℃, T2=3℃.

[0056] T 内环i : Current indoor ambient temperature, this value is the measured value, ℃.

[0057] T 内环i-1 : Indoor ambient temperature in the first minute, this value is the measured value, ℃.

[0058] ψ: Preset indoor ambient temperature drop rate, °C / min. If T 内环i -T 内环(i-1) ≤ψ indicates that the current indoor temperature drop rate is slow, and adjustments are needed to accelerate the temperature drop. If T 内环i -T 内环(i-1) >ψ indicates that the indoor temperature drop rate is already relatively fast. In order to quickly reach the set indoor temperature, the heat exchange temperature difference can be slightly increased to enhance the cooling effect.

[0059] T 露点 Air dew point temperature, value is the measured value, ℃.

[0060] ΔT3, ΔT4: Preset values ​​for the temperature difference between the indoor heat exchanger and the air dew point, in °C, where ΔT3 > 0 > ΔT4. When T 内管 -T 露点 A value ≥ΔT3 indicates that although the current indoor heat exchanger temperature is low, the difference between it and the current air dew point temperature is significant (i.e., the current air is very dry, the relative humidity is low, the dew point temperature is low, and the risk of freezing is low). Therefore, the heat exchange temperature difference can be further enhanced to rapidly improve the cooling effect. When ΔT3 > T... 内管 -T 露点 A temperature difference greater than 0 indicates a small difference between the current indoor heat exchanger temperature and the current air dew point temperature. However, since the indoor heat exchanger temperature is still higher than the air dew point temperature, the risk of freezing is low, and the heat exchange temperature difference can be slightly increased to enhance the cooling effect. When 0 ≥ T... 内管 -T 露点≥ΔT4 indicates that the current indoor heat exchanger temperature is still below the air dew point temperature. At this point, condensation has begun to form in the indoor heat exchanger. However, since it takes time for condensation to freeze, and freezing only occurs when the indoor heat exchanger temperature is below 0℃, the current operating state can be maintained to ensure cooling performance. When ΔT4 > T 内管 -T 露点 This indicates that the current indoor heat exchanger temperature is still significantly lower than the air dew point temperature, posing a risk of freezing. Further parameter collection is needed for a more accurate assessment. The value range is 0℃-10℃; one possible value is ΔT3 = 4℃, ΔT4 = 2℃.

[0061] T3: Preset icing temperature for the indoor heat exchanger, in °C, where T1 > T2 > T3. If the indoor heat exchanger temperature is still significantly lower than the air dew point temperature, further monitoring of the current indoor heat exchanger temperature is conducted. When T... 内管 ≤T3 indicates that the indoor heat exchanger temperature has reached the freezing point, posing a high risk of freezing. It is necessary to adjust the indoor heat exchanger temperature to raise it while minimizing the impact on the temperature drop effect. When T... 内管 A value greater than T3 indicates that the indoor heat exchanger temperature has not yet reached the freezing point, therefore the current operating state is maintained, and the existing temperature of the heat exchanger is preserved. This value ranges from 0℃ to 5℃; one possible value is 0℃.

[0062] F: Air conditioner compressor operating frequency, this value is the measured value, Hz.

[0063] F min The minimum permissible operating speed of the compressor is determined by the compressor itself, in Hz.

[0064] F max The minimum permissible high speed for compressor operation is determined by the compressor itself, in Hz.

[0065] f1: Compressor frequency reduction rate, Hz / s. The value ranges from 1 to 10 Hz / s, with one possible value being 5 Hz / s.

[0066] f2, f3: Compressor frequency ramp-up rate, Hz / s, where f2 > f3. The value range is 1 to 10 Hz / s, with one possible value being f2 = 5 Hz / s and f3 = 2 Hz / s.

[0067] F a : Compressor boost frequency, Hz. The value ranges from 5-20Hz / s, with one possible value being 10Hz / s.

[0068] T 排气 Air conditioner compressor exhaust temperature, this value is the measured value, ℃.

[0069] T排气max The maximum allowable discharge temperature of the compressor is determined by the compressor itself, in °C.

[0070] t1: Compressor exhaust temperature reduction rate, °C / min. This value ranges from 1 to 20 °C / min, with one possible value being 5 °C / min.

[0071] t2 and t3: The rate of increase in compressor exhaust temperature, in °C / min, where t2 > t3. The range of values ​​is 1-20 °C / min, with one possible value being t2 = 5 °C / min and t3 = 3 °C / min.

[0072] T a The compressor exhaust temperature is reduced by ℃. The value range is 1-20℃, with one possible value being 10℃.

[0073] T b : Compressor exhaust temperature, °C. The range of this value is 1-20 °C, with one possible value being 8 °C.

[0074] R: Indoor fan speed, this value is the measured value, rpm.

[0075] R min The minimum permissible operating speed of the internal fan is determined by the fan itself, in rpm.

[0076] R max The maximum permissible speed of the internal fan is determined by the noise level of the air conditioner, in rpm.

[0077] α: Rate of decrease in internal fan speed, rpm / 10s. This value ranges from 5 to 100 rpm / 10s, with one possible value being 20 rpm / 10s.

[0078] β: Internal fan speed increase rate, rpm / 10s. This value ranges from 5 to 100 rpm / 10s, with one possible value being 50 rpm / 10s.

[0079] As described in the background section, to avoid the "freezing" problem, existing air conditioners rely solely on the indoor heat exchanger temperature for temperature control, neglecting the influence of air dew point temperature on condensate condensation. This leads to false freezing prevention even when there is no risk of freezing, causing the air conditioning system to operate at low frequency under these conditions, resulting in poor indoor temperature reduction. To address this issue, embodiments of the present invention provide a control method for an air conditioner.

[0080] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0081] According to an embodiment of the present invention, a method embodiment for controlling an air conditioner is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0082] Figure 1 This is a flowchart of an air conditioner control method according to an embodiment of the present invention, such as... Figure 1 As shown, the control method of this air conditioner includes the following steps:

[0083] Step S102: During the operation of the air conditioner in cooling mode, obtain the first indoor ambient temperature of the room where the air conditioner is located.

[0084] Optionally, after the air conditioner enters cooling mode, the initial indoor ambient temperature of the room can be collected by a temperature sensor installed in the room where the air conditioner is located, i.e., T. 内环 At the same time, it obtains the user-set operating temperature of the air conditioner, that is, the user-set temperature T. 设定 .

[0085] Figure 2 This is a flowchart of an optional air conditioner control method according to an embodiment of the present invention, such as... Figure 2 As shown, when the air conditioner is running in cooling mode, the temperature of room T where the air conditioner is located is detected. 内环 At the same time, obtain T 设定 .

[0086] Step S104: When the first temperature difference between the first indoor ambient temperature and the set temperature is greater than or equal to the first temperature difference threshold, the inner tube temperature of the indoor heat exchanger of the air conditioner is obtained, wherein the set temperature is the pre-set operating temperature of the air conditioner.

[0087] In this embodiment, T can be 内环 With T 设定 By taking the difference, we obtain the first temperature difference value, at T 内环 -T 设定 When the temperature difference is greater than or equal to ΔT1 (i.e., the first temperature difference threshold), it indicates that the current indoor temperature is significantly different from the set temperature and is in a stage where rapid cooling is required. At this time, the temperature of the inner tube of the indoor heat exchanger of the air conditioner will continue to be acquired and used as a factor to determine the operating mode of the air conditioner, thereby improving the reliability of the air conditioner's operation.

[0088] like Figure 2 As shown, when T 内环 -T 设定 When ≥ΔT1, the temperature T of the inner tube of the indoor heat exchanger is measured. 内管 .

[0089] Step S106: When the inner pipe temperature is lower than the preset inner pipe temperature, obtain the dew point temperature of the room where the air conditioner is located.

[0090] Step S108: Determine the second temperature difference between the dew point temperature and the inner tube temperature.

[0091] In this embodiment, if the inner tube temperature T is determined... 内管 When the temperature is less than T2 (preset temperature of the inner pipe), it indicates that the current indoor heat exchanger temperature is too low and there is a risk of freezing, requiring further parameter collection for judgment. Therefore, at this time, the dew point temperature of the room where the air conditioner is located will continue to be acquired, and the temperature difference between it and the inner pipe temperature will be used as a factor to determine the operating mode of the air conditioner, further improving the safety of the air conditioner's operation.

[0092] like Figure 2 As shown, when T 内管 <T2 (Indoor heat exchanger preset temperature, also known as the aforementioned inner pipe preset temperature), detect the dew point temperature T of the room where the air conditioner is located. 露点 And determine T 露点 With T 内管 The temperature difference between them.

[0093] Step S110: Based on the relationship between the second temperature difference value and the second temperature difference threshold and the third temperature difference threshold, the operating mode of the air conditioner is determined, wherein the second temperature difference threshold is greater than the third temperature difference threshold.

[0094] In this embodiment, the operating mode of the air conditioner can be determined based on the temperature difference between the dew point temperature and the inner pipe temperature, and their relationship with the second and third temperature difference thresholds, respectively. This can greatly reduce the probability of false freezing and improve the reliability of the air conditioner.

[0095] like Figure 2 As shown, T can be determined. 内管 -T 露点 The relationship between ΔT3 (the second temperature difference threshold) and ΔT4 (the third temperature difference threshold) is explained below with reference to specific embodiments. This will not be elaborated further here.

[0096] Step S112: Control the air conditioner to operate according to the operating mode.

[0097] As can be seen from the above, in this embodiment of the invention, during the operation of the air conditioner in cooling mode, the first indoor ambient temperature of the room where the air conditioner is located can be obtained; when the first temperature difference between the first indoor ambient temperature and the set temperature is greater than or equal to the first temperature difference threshold, the inner pipe temperature of the indoor heat exchanger of the air conditioner can be obtained; when the inner pipe temperature is less than the preset inner pipe temperature, the dew point temperature of the room where the air conditioner is located can be obtained; a second temperature difference between the dew point temperature and the inner pipe temperature can be determined; based on the relationship between the second temperature difference and the second temperature difference threshold and the third temperature difference threshold, the operating mode of the air conditioner can be determined; and the air conditioner can be controlled to operate according to the operating mode. This achieves the purpose of confirming the current operating status by detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, the difference between the indoor air dew point temperature and the indoor heat exchanger temperature, and by adjusting the operating model of the air conditioner to perform precise anti-freezing processing, making the control more reasonable and intelligent, and solving the problem of false anti-freezing when there is no risk of freezing.

[0098] It is easy to notice that, when performing antifreeze, the air conditioner's operating mode is determined by detecting the temperature difference between the indoor ambient temperature and the set temperature, the temperature of the indoor heat exchanger's inner tube, and the temperature difference between the indoor air dew point temperature and the indoor heat exchanger's inner tube. Compared to existing technologies that rely solely on the temperature of the air conditioner's indoor heat exchanger to determine whether to enter antifreeze mode, which is prone to falsely triggering antifreeze when there is no risk of freezing, this technology makes the control more rational and intelligent, solving the problem of falsely triggering antifreeze when there is no risk of freezing.

[0099] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that, in order to avoid freezing of the indoor heat exchange fins of the air conditioner, the determination of whether to enter the anti-freeze mode is based solely on the temperature of the indoor heat exchange fins of the air conditioner, which easily leads to false freezing when there is no risk of freezing.

[0100] To enable those skilled in the art to better understand the technical solution of the present invention, the implementation process of the air conditioner control method of the present invention will be described in detail below with reference to specific embodiments.

[0101] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the first temperature difference is less than a first temperature difference threshold and the first temperature difference is greater than a second temperature difference threshold, controlling the air conditioner to operate according to the current operating mode, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

[0102] like Figure 2 As shown, when ΔT1 (first temperature difference threshold) > T 内环 -T 设定 When the temperature difference exceeds ΔT2 (the second temperature difference threshold), it indicates that the difference between the current indoor temperature and the set temperature is small, and the current operating state can be maintained to continue cooling. Therefore, the air conditioner can be controlled to maintain the current operating mode.

[0103] According to the above embodiments of the present invention, the control method of the air conditioner may further include: when the first temperature difference is less than or equal to the second temperature difference threshold, obtaining the first operating frequency of the air conditioner's compressor; when the first operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate at the minimum operating frequency; when the first operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0104] like Figure 2 As shown, when ΔT2>T 内环 -T 设定 When the indicator shows that the current indoor temperature is close to the target temperature, low-power energy-saving operation can be initiated. At this time, the air conditioner can be controlled to enter the first control state.

[0105] In the first control state, the air conditioner operates in a low-power energy-saving mode. Specifically, in this control state, the compressor frequency is reduced to the lowest frequency at which the compressor can operate, the exhaust temperature is reduced to a preset temperature, and the indoor fan speed is reduced to the lowest permissible speed to achieve low-power operation.

[0106] Figure 3 This is a flowchart of the first control state according to an embodiment of the present invention, such as... Figure 3 As shown, when the air conditioner enters the first control state, the operating frequency F of the air conditioner compressor (i.e., the first operating frequency) can be detected; it can be determined whether the current condition satisfies F = F min If so, then check the current compressor discharge temperature T. 排气 The exhaust temperature is controlled to decrease at a rate of t1 (predetermined temperature drop rate) until it reaches T. 排气 -T a Conversely, the compressor frequency is reduced at a rate of f1 (preset frequency reduction rate) until F = F min .

[0107] According to the above embodiments of the present invention, after controlling the current exhaust temperature to decrease at a predetermined rate, the control method of the air conditioner further includes: obtaining the current speed of the indoor fan of the air conditioner; when the current speed is not equal to the minimum speed, controlling the indoor fan to decrease its speed to the minimum speed at a predetermined rate, and controlling the indoor fan to operate at the minimum speed; when the current speed is equal to the minimum speed, controlling the air conditioner to operate according to the current operating mode.

[0108] like Figure 3 As shown, the exhaust temperature is controlled to decrease at a rate of t1 (a predetermined temperature drop rate) until it reaches T_exhaust - T_min. aNext, the current indoor fan speed R can be detected; it can then be determined whether the current indoor fan speed R satisfies R = R min If the condition is not met, the internal fan speed will be reduced at a rate of α (predetermined speed reduction rate) until R = R min If the conditions are met, the current operating state will be maintained.

[0109] According to the above embodiments of the present invention, the control method of the air conditioner may further include: when the inner pipe temperature is greater than the preset inner pipe temperature, acquiring a second indoor ambient temperature and a third indoor ambient temperature of the room where the air conditioner is located, wherein the second indoor ambient temperature is the temperature acquired at the temperature acquisition time preceding the temperature acquisition time of the third indoor ambient temperature; determining the temperature drop rate from the second indoor ambient temperature to the third indoor ambient temperature; when the temperature drop rate is less than or equal to the preset temperature drop rate, acquiring a second operating frequency of the air conditioner's compressor; when the second operating frequency is not equal to the maximum operating frequency, controlling the compressor to increase its operating frequency to the maximum operating frequency according to a first preset frequency increase rate, and controlling the compressor to operate at the maximum operating frequency.

[0110] like Figure 2 As shown, when T 内管 When the temperature exceeds T1 (inner pipe preset temperature, i.e., indoor heat exchanger preset temperature), it indicates that the current indoor heat exchanger temperature is high, with no risk of freezing, and can further enhance the heat exchange temperature difference, rapidly improving the cooling effect. At this time, T1 can be monitored and recorded in real time. 内环 When the current indoor ambient temperature T is detected 内环i (Second indoor ambient temperature), indoor ambient temperature T 1 minute prior 内环(i-1) (Third indoor ambient temperature) meets T 内环i -T 内环(i-1) If the temperature drop rate is less than or equal to ψ (preset temperature drop rate), the system enters the second control state. Otherwise, it enters the third control state.

[0111] The second control state is the rapid frequency ramp-up control stage. In this state, the compressor frequency is rapidly increased to the highest operating frequency, and the discharge temperature is rapidly increased to the highest permissible discharge temperature to achieve rapid cooling. The third control state is the gradual frequency ramp-up control. In this state, the compressor frequency is slowly increased to a preset frequency or to the highest operating frequency, and the discharge temperature is slowly increased to a preset temperature or to the highest permissible discharge temperature to enhance the cooling effect.

[0112] For example Figure 2 As shown, when T1≥T 内管 When T2 is greater than or equal to 2, the air conditioner is controlled to enter the third control state.

[0113] Figure 4This is a flowchart of the second control state according to an embodiment of the present invention, such as... Figure 4 As shown, when the air conditioner is operating in the second control state, the operating frequency F (second operating frequency) of the air conditioner compressor is detected; it is then determined whether F = F max (Maximum operating frequency), if not met, the compressor frequency is controlled to increase at a rate of f2 (first preset frequency increase rate) until F = F max .

[0114] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0115] like Figure 4 As shown, if the current condition is satisfied, F = F max Then detect the current compressor discharge temperature T. 排气 (Current exhaust temperature), if T is satisfied 排气 =T 排气max If the current operating state is maintained, the exhaust temperature will continue to rise at a rate of t2 (the first predetermined temperature rise rate) until it reaches T. 排气 =T 排气max .

[0116] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the temperature drop rate is greater than the preset temperature drop rate, obtaining the third operating frequency of the air conditioner compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to the second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0117] Figure 5 This is a flowchart of the third control state according to an embodiment of the present invention, such as... Figure 5 As shown, when the air conditioner is operating in the third control state, the operating frequency F (third operating frequency) of the air conditioner compressor is detected; it is then determined whether the current condition satisfies F = F max (Maximum operating frequency), if not met, the compressor frequency is controlled to increase at a rate of f3 (second preset frequency increase rate) until F = F. max Or until F+F is reached a (Pre-determined frequency).

[0118] According to the above embodiments of the present invention, the control method of the air conditioner may further include: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0119] like Figure 5 As shown, if the current condition is satisfied, F = F max Then detect the current compressor discharge temperature T. 排气 (Current exhaust temperature), if T is satisfied 排气 =T 排气max If the current operating state is maintained, the exhaust temperature will continue to rise at a rate of t3 (the second predetermined temperature rise rate) until it reaches T. 排气 =T 排气max or until T is reached 排气 +T b (Preset temperature).

[0120] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the second temperature difference is greater than or equal to the second temperature difference threshold, obtaining the second operating frequency of the air conditioner compressor; when the second operating frequency is not equal to the lowest operating frequency, controlling the compressor to increase its operating frequency to the highest operating frequency according to the first preset frequency increase rate, and controlling the compressor to operate at the highest operating frequency.

[0121] In this embodiment, if T 内管 -T 露点 A value ≥ΔT3 indicates that although the current indoor heat exchanger temperature is low, the difference between it and the current air dew point temperature is significant (i.e., the current air is very dry, the relative humidity is low, the dew point temperature is low, and the risk of freezing is low). Therefore, the heat exchange temperature difference can be further enhanced to quickly improve the cooling effect. In this case, the air conditioner enters the second control state, the control flow of which is as described above. Figure 4 As shown, it will not be elaborated further here.

[0122] Optionally, the control method of the air conditioner further includes: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0123] Through the aforementioned second control state, the compressor frequency can be rapidly increased to the highest frequency at which the compressor can operate, and the exhaust temperature can be rapidly increased to the highest permissible exhaust temperature, thereby achieving rapid cooling.

[0124] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the second temperature difference is less than the second temperature difference threshold and greater than 0, obtaining the third operating frequency of the air conditioner's compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to the second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0125] like Figure 2 As shown, when ΔT3 (second temperature difference threshold) > T 内管 -T 露点 If the second temperature difference is greater than 0, it indicates that the difference between the current indoor heat exchanger temperature and the current air dew point temperature is small. However, since the indoor heat exchanger temperature is still higher than the air dew point temperature, the risk of freezing is low, and the heat exchange temperature difference can be slightly increased to enhance the cooling effect. Therefore, the air conditioner can be controlled to enter the third control state. When the air conditioner is operating in the third control state, the compressor operating frequency F (third operating frequency) is detected; it is then determined whether F = F0 is satisfied. max (Maximum operating frequency), if not met, the compressor frequency is controlled to increase at a rate of f3 (second preset frequency increase rate) until F = F. max Or until F+F is reached a (Pre-determined frequency).

[0126] Optionally, the control method of the air conditioner further includes: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to the second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0127] like Figure 5 As shown, if the current condition is satisfied, F = F max Then detect the current compressor discharge temperature T. 排气 (Current exhaust temperature), if T is satisfied 排气 =T 排气max If the current operating state is maintained, the exhaust temperature will continue to rise at a rate of t3 (the second predetermined temperature rise rate) until it reaches T. 排气 =T 排气max or until T is reached 排气 +T b (Preset temperature, that is, the compressor exhaust temperature).

[0128] The third control state described above can be used to slowly increase the compressor frequency to a preset frequency or to the highest frequency at which the compressor can operate, and slowly increase the exhaust temperature to a preset temperature or to the highest allowable exhaust temperature, thereby enhancing the cooling effect.

[0129] According to the above embodiments of the present invention, the control method of the air conditioner further includes: when the second temperature difference is greater than or equal to a third temperature difference threshold and less than or equal to 0, controlling the air conditioner to operate according to the current operating mode; when the second temperature difference is less than the third temperature difference threshold, if the inner pipe temperature is less than or equal to the freezing temperature of the indoor heat exchanger, obtaining the fourth operating frequency of the air conditioner's compressor; when the fourth operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate at the minimum operating frequency; when the fourth operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0130] like Figure 2 As shown, when ΔT4 (the third temperature difference threshold) ≤ T 内管 -T 露点 When the temperature is <0, it indicates that the current indoor heat exchanger temperature is still below the air dew point temperature. At this time, condensation has begun to form in the indoor heat exchanger. However, since it takes a certain amount of time for condensation to freeze, and freezing only occurs when the indoor heat exchanger temperature is below 0°C, the current operating state can be maintained to ensure the cooling effect. Therefore, the air conditioner can be controlled to maintain its current operating state at this time.

[0131] For example Figure 2 As shown, when ΔT4>T 内管 -T 露点 This indicates that the current indoor heat exchanger temperature is still significantly lower than the air dew point temperature, posing a risk of freezing. Further parameter collection is needed for assessment. At this point, the indoor heat exchanger temperature T is determined. 内管 Does T satisfy? 内管 If the value is ≤T3 (the preset freezing temperature of the indoor heat exchanger, also known as the freezing temperature), it indicates that the indoor heat exchanger temperature has reached the freezing temperature, posing a high risk of freezing. The indoor heat exchanger temperature needs to be adjusted to rise, while minimizing the impact on the temperature drop effect, thus entering the fourth control state. Conversely, if the value is not met, it indicates that the indoor heat exchanger temperature has not yet reached the freezing temperature. Therefore, the current operating state is maintained, preserving the existing heat exchanger temperature. In other words, the air conditioner can be controlled to operate according to the current operating mode.

[0132] It should be noted that the fourth control state is the frequency reduction and anti-freeze control stage. In this control state, the compressor frequency is reduced to the lowest frequency at which the compressor can operate, the exhaust temperature is reduced to a preset temperature, and the indoor fan speed is increased to the highest permissible speed, so as to achieve a rapid temperature recovery of the indoor heat exchanger and prevent the indoor heat exchanger from freezing.

[0133] Figure 6 This is a flowchart of the fourth control state according to an embodiment of the present invention, such as... Figure 6 As shown, when the air conditioner is operating in the fourth control state, the operating frequency F (fourth operating frequency) of the air conditioner compressor is detected; it is then determined whether F = F min (Minimum operating frequency), if not met, the compressor frequency is controlled to decrease at a rate of f1 (preset frequency reduction rate) until F = F min Conversely, if F = F min Then detect the current compressor discharge temperature T. 排气 (Current exhaust temperature), and control the exhaust temperature to decrease at a rate of t1 (predetermined temperature drop rate) until it reaches T. 排气 -T a (The compressor discharges gas to reduce the temperature).

[0134] In addition, after controlling the current exhaust temperature to decrease at a predetermined rate, the control method of the air conditioner may further include: obtaining the current speed of the indoor fan of the air conditioner; when the current speed is not equal to the maximum speed, controlling the indoor fan to increase its speed to the maximum speed at a predetermined rate of increase, and controlling the indoor fan to operate at the maximum speed; when the current speed is equal to the maximum speed, controlling the air conditioner to operate according to the current operating mode.

[0135] like Figure 6 As shown, when detecting the current indoor fan speed R, if R = R max Then the internal fan speed is increased at a rate of β (predetermined speed increase rate) until R = R max If the conditions are met, the current operating state will be maintained.

[0136] As can be seen from the above, in this embodiment of the invention, to avoid the "freezing" problem, existing air conditioners only judge based on the indoor heat exchanger temperature, without considering the influence of the air dew point temperature on the condensation of condensate. This leads to false freezing prevention even when there is no freezing risk, causing the air conditioning system to operate at low frequency under no-freezing-risk conditions, resulting in a poor indoor temperature reduction effect. By detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, the indoor ambient temperature drop rate, and the difference between the indoor air dew point temperature and the indoor heat exchanger temperature, the current operating state is confirmed. The operating state of the air conditioning system is then regulated by adjusting the compressor frequency, exhaust temperature, and indoor fan speed, making the control more reasonable and intelligent, thus solving the problem of false freezing prevention even when there is no freezing risk.

[0137] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0138] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0139] According to embodiments of the present invention, a control device for an air conditioner for implementing the control method of the air conditioner described above is also provided. It should be noted that this device is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0140] The control device for the air conditioner provided in the embodiments of the present invention will be described below.

[0141] Figure 7 This is a schematic diagram of the control device of an air conditioner according to an embodiment of the present invention, such as... Figure 7As shown, the control device of the air conditioner includes: a first acquisition unit 701, a second acquisition unit 703, a third acquisition unit 705, a first determination unit 707, a second determination unit 709, and a control unit 711.

[0142] The first acquisition unit 701 is used to acquire the first indoor ambient temperature of the room where the air conditioner is located during the operation of the air conditioner in cooling mode.

[0143] The second acquisition unit 703 is used to acquire the inner tube temperature of the indoor heat exchanger of the air conditioner when the first temperature difference between the first indoor ambient temperature and the set temperature is greater than or equal to the first temperature difference threshold, wherein the set temperature is the pre-set operating temperature of the air conditioner.

[0144] The third acquisition unit 705 is used to acquire the dew point temperature of the room where the air conditioner is located when the inner pipe temperature is lower than the preset inner pipe temperature.

[0145] The first determining unit 707 is used to determine the second temperature difference between the dew point temperature and the inner tube temperature.

[0146] The second determining unit 709 is used to determine the operating mode of the air conditioner based on the relationship between the second temperature difference value and the second temperature difference threshold and the third temperature difference threshold, wherein the second temperature difference threshold is greater than the third temperature difference threshold.

[0147] Control unit 711 is used to control the air conditioner to operate according to the operating mode.

[0148] The control device of the aforementioned air conditioner includes a processor and a memory. The first acquisition unit 701, the second acquisition unit 703, the third acquisition unit 705, the first determination unit 707, the second determination unit 709, and the control unit 711 are all stored as program units in the memory. The processor executes the program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0149] The aforementioned processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured. By adjusting kernel parameters, the current operating status is determined by detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, and the difference between the indoor air dew point temperature and the indoor heat exchanger temperature. Furthermore, precise anti-freezing measures are implemented by adjusting the air conditioner's operating model, making control more rational and intelligent, and resolving the problem of falsely preventing freezing when there is no actual risk.

[0150] The aforementioned memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0151] It should be noted that the first acquisition unit 701, the second acquisition unit 703, the third acquisition unit 705, the first determination unit 707, the second determination unit 709, and the control unit 711 mentioned above correspond to steps S102 to S112 in the method embodiment. The three modules and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above method embodiment.

[0152] As can be seen from the above, in the solution described in the above embodiments of the present invention, the first acquisition unit can acquire the first indoor ambient temperature of the room where the air conditioner is located during the air conditioner's operation in cooling mode; the second acquisition unit can acquire the inner pipe temperature of the indoor heat exchanger of the air conditioner when the first temperature difference between the first indoor ambient temperature and the set temperature is greater than or equal to the first temperature difference threshold, wherein the set temperature is the pre-set operating temperature of the air conditioner; the third acquisition unit can acquire the dew point temperature of the room where the air conditioner is located when the inner pipe temperature is less than the preset inner pipe temperature; and the first determination unit can determine the second temperature difference between the dew point temperature and the inner pipe temperature. The system utilizes a second determining unit to determine the air conditioner's operating mode based on the relationship between the second temperature difference value and the second and third temperature difference thresholds, where the second temperature difference threshold is greater than the third temperature difference threshold. It also uses a control unit to control the air conditioner to operate according to the operating mode. This achieves the goal of confirming the current operating status by detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, and the difference between the indoor air dew point temperature and the indoor heat exchanger temperature. Furthermore, it performs precise anti-freezing processing by adjusting the air conditioner's operating model, making the control more reasonable and intelligent, and solving the problem of falsely preventing freezing when there is no risk of freezing.

[0153] It is easy to notice that, when performing antifreeze, the air conditioner's operating mode is determined by detecting the temperature difference between the indoor ambient temperature and the set temperature, the temperature of the indoor heat exchanger's inner tube, and the temperature difference between the indoor air dew point temperature and the indoor heat exchanger's inner tube. Compared to existing technologies that rely solely on the temperature of the air conditioner's indoor heat exchanger to determine whether to enter antifreeze mode, which is prone to falsely triggering antifreeze when there is no risk of freezing, this technology makes the control more rational and intelligent, solving the problem of falsely triggering antifreeze when there is no risk of freezing.

[0154] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that, in order to avoid freezing of the indoor heat exchange fins of the air conditioner, the determination of whether to enter the anti-freeze mode is based solely on the temperature of the indoor heat exchange fins of the air conditioner, which easily leads to false freezing when there is no risk of freezing.

[0155] Optionally, the control device of the air conditioner further includes: a control unit, used to control the air conditioner to operate according to the current operating mode when the first temperature difference is less than a first temperature difference threshold and the first temperature difference is greater than a second temperature difference threshold, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

[0156] Optionally, the control device of the air conditioner further includes: a fourth acquisition unit, used to acquire the first operating frequency of the air conditioner's compressor when the first temperature difference is less than or equal to the second temperature difference threshold; a control unit, used to control the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate when the first operating frequency is not equal to the minimum operating frequency, and to control the compressor to operate at the minimum operating frequency; and a control unit, used to acquire the current exhaust temperature of the compressor when the first operating frequency is equal to the minimum operating frequency, and to control the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0157] Optionally, the control device of the air conditioner further includes: a fifth acquisition unit, used to acquire the current speed of the indoor fan of the air conditioner after controlling the current exhaust temperature to decrease to the predetermined exhaust temperature at a second predetermined rate; a control unit, used to control the indoor fan to decrease its speed to the minimum speed at a predetermined rate when the current speed is not equal to the minimum speed, and to control the indoor fan to operate at the minimum speed; and a control unit, used to control the air conditioner to operate according to the current operating mode when the current speed is equal to the minimum speed.

[0158] Optionally, the control device of the air conditioner further includes: a sixth acquisition unit, used to acquire a second indoor ambient temperature and a third indoor ambient temperature of the room where the air conditioner is located when the inner pipe temperature is greater than the preset inner pipe temperature, wherein the second indoor ambient temperature is the temperature acquired at the temperature acquisition time before the temperature acquisition time of the third indoor ambient temperature; a third determination unit, used to determine the temperature drop rate from the second indoor ambient temperature to the third indoor ambient temperature; a seventh acquisition unit, used to acquire a second operating frequency of the air conditioner's compressor when the temperature drop rate is less than or equal to a preset temperature drop rate; and a control unit, used to control the compressor to increase its operating frequency to the maximum operating frequency according to a first preset frequency increase rate when the second operating frequency is not equal to the maximum operating frequency, and to control the compressor to operate at the maximum operating frequency.

[0159] Optionally, the control device of the air conditioner further includes: an eighth acquisition unit, used to acquire the current exhaust temperature of the compressor when the second operating frequency is equal to the maximum operating frequency; a control unit, used to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the maximum exhaust temperature; and a control unit, used to control the current exhaust temperature to rise to the maximum exhaust temperature at a first predetermined temperature rise rate if the current exhaust temperature is not equal to the maximum exhaust temperature.

[0160] Optionally, the control device of the air conditioner further includes: a ninth acquisition unit, used to acquire the third operating frequency of the air conditioner's compressor when the temperature drop rate is greater than the preset temperature drop rate; and the control unit controls the compressor to increase its frequency to the maximum operating frequency according to the second preset frequency increase rate, or to increase the third operating frequency by a predetermined frequency, when the third operating frequency is not equal to the maximum operating frequency.

[0161] Optionally, the control device of the air conditioner further includes: a tenth acquisition unit, used to acquire the current exhaust temperature of the compressor when the third operating frequency is equal to the highest operating frequency; a control unit, used to control the air conditioner to operate according to the current operating mode when the current exhaust temperature is equal to the highest exhaust temperature; and a control unit, used to control the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or to increase the current exhaust temperature by a predetermined temperature, when the current exhaust temperature is not equal to the highest exhaust temperature.

[0162] Optionally, the control device of the air conditioner further includes: an eleventh acquisition unit, used to acquire the second operating frequency of the air conditioner's compressor when the second temperature difference is greater than or equal to the second temperature difference threshold; and a control unit, used to control the compressor to increase its operating frequency to the highest operating frequency according to a first preset frequency increase rate when the second operating frequency is not equal to the lowest operating frequency, and to control the compressor to operate at the highest operating frequency.

[0163] Optionally, the control device of the air conditioner further includes: a twelfth acquisition unit, used to acquire the current exhaust temperature of the compressor when the second operating frequency is equal to the maximum operating frequency; a control unit, used to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the maximum exhaust temperature; and a control unit, used to control the current exhaust temperature to rise to the maximum exhaust temperature at a first predetermined temperature rise rate if the current exhaust temperature is not equal to the maximum exhaust temperature.

[0164] Optionally, the control device of the air conditioner further includes: a thirteenth acquisition unit, used to acquire the third operating frequency of the air conditioner's compressor when the second temperature difference is less than the second temperature difference threshold and greater than 0; and a control unit, used to control the compressor to increase its frequency to the maximum operating frequency according to the second preset frequency increase rate, or to increase the third operating frequency by a predetermined frequency, when the third operating frequency is not equal to the maximum operating frequency.

[0165] Optionally, the control device of the air conditioner further includes: a fourteenth acquisition unit, used to acquire the current exhaust temperature of the compressor when the third operating frequency is equal to the highest operating frequency; a control unit, used to control the air conditioner to operate according to the current operating mode if the current exhaust temperature is equal to the highest exhaust temperature; and a control unit, used to control the current exhaust temperature to rise to the highest exhaust temperature at a first predetermined temperature rise rate if the current exhaust temperature is not equal to the highest exhaust temperature.

[0166] Optionally, the control device of the air conditioner further includes: a control unit, configured to control the air conditioner to operate according to the current operating mode when the second temperature difference is greater than or equal to the third temperature difference threshold and less than or equal to 0; a fifteenth acquisition unit, configured to acquire the fourth operating frequency of the air conditioner's compressor when the second temperature difference is less than the third temperature difference threshold and the inner pipe temperature is less than or equal to the freezing temperature of the indoor heat exchanger; a control unit, configured to control the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate when the fourth operating frequency is not equal to the minimum operating frequency, and to control the compressor to operate at the minimum operating frequency; and a control unit, configured to acquire the current exhaust temperature of the compressor when the fourth operating frequency is equal to the minimum operating frequency, and to control the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0167] Optionally, the control device of the air conditioner further includes: a sixteenth acquisition unit, used to acquire the current speed of the indoor fan of the air conditioner after controlling the current exhaust temperature to decrease at a second predetermined rate; a control unit, used to control the indoor fan to increase its speed to the maximum speed at a predetermined rate when the current speed is not equal to the maximum speed, and to control the indoor fan to operate at the maximum speed; and a control unit, used to control the air conditioner to operate according to the current operating mode when the current speed is equal to the maximum speed.

[0168] According to another aspect of the present invention, an air conditioner is also provided, wherein the air conditioner uses the control method of any of the above-described air conditioners.

[0169] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method of an air conditioner according to any one of the above embodiments.

[0170] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0171] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: During the operation of the air conditioner in cooling mode, acquiring a first indoor ambient temperature of the room where the air conditioner is located; when the first temperature difference between the first indoor ambient temperature and a set temperature is greater than or equal to a first temperature difference threshold, acquiring the inner pipe temperature of the indoor heat exchanger of the air conditioner, wherein the set temperature is a pre-set operating temperature of the air conditioner; when the inner pipe temperature is less than the preset inner pipe temperature, acquiring the dew point temperature of the room where the air conditioner is located; determining a second temperature difference between the dew point temperature and the inner pipe temperature; based on the magnitude relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold, determining the operating mode of the air conditioner, wherein the second temperature difference threshold is greater than the third temperature difference threshold; and controlling the air conditioner to operate according to the operating mode.

[0172] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the first temperature difference is less than a first temperature difference threshold and the first temperature difference is greater than a second temperature difference threshold, controlling the air conditioner to operate according to the current operating mode, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

[0173] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the first temperature difference is less than or equal to the second temperature difference threshold, obtaining the first operating frequency of the air conditioner's compressor; when the first operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate at the minimum operating frequency; when the first operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0174] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the current speed of the indoor fan of the air conditioner; when the current speed is not equal to the minimum speed, controlling the indoor fan to reduce its speed to the minimum speed at a predetermined speed reduction rate, and controlling the indoor fan to operate at the minimum speed; when the current speed is equal to the minimum speed, controlling the air conditioner to operate according to the current operating mode.

[0175] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the inner pipe temperature is greater than the preset inner pipe temperature, acquiring the second indoor ambient temperature and the third indoor ambient temperature of the room where the air conditioner is located, wherein the second indoor ambient temperature is the temperature acquired at the temperature acquisition time preceding the temperature acquisition time of the third indoor ambient temperature; determining the temperature drop rate from the second indoor ambient temperature to the third indoor ambient temperature; when the temperature drop rate is less than or equal to the preset temperature drop rate, acquiring the second operating frequency of the air conditioner's compressor; when the second operating frequency is not equal to the maximum operating frequency, controlling the compressor to increase its operating frequency to the maximum operating frequency according to the first preset frequency increase rate, and controlling the compressor to operate at the maximum operating frequency.

[0176] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0177] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the temperature drop rate is greater than a preset temperature drop rate, obtaining the third operating frequency of the air conditioner's compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to a second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0178] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0179] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the second temperature difference is greater than or equal to the second temperature difference threshold, obtaining the second operating frequency of the air conditioner's compressor; when the second operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its operating frequency to the highest operating frequency according to a first preset frequency increase rate, and controlling the compressor to operate at the highest operating frequency.

[0180] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the second operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature according to a first predetermined temperature rise rate.

[0181] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the second temperature difference is less than the second temperature difference threshold and greater than 0, obtaining the third operating frequency of the air conditioner's compressor; when the third operating frequency is not equal to the highest operating frequency, controlling the compressor to increase its frequency to the highest operating frequency according to the second preset frequency increase rate, or increasing the third operating frequency by a predetermined frequency.

[0182] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the third operating frequency is equal to the highest operating frequency, obtaining the current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate according to the current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to rise to the highest exhaust temperature at a second predetermined temperature rise rate, or increasing the current exhaust temperature by a predetermined temperature.

[0183] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the second temperature difference is greater than or equal to a third temperature difference threshold and less than or equal to 0, controlling the air conditioner to operate according to the current operating mode; when the second temperature difference is less than the third temperature difference threshold, if the inner pipe temperature is less than or equal to the freezing temperature of the indoor heat exchanger, obtaining the fourth operating frequency of the air conditioner's compressor; when the fourth operating frequency is not equal to the minimum operating frequency, controlling the compressor to reduce its frequency to the minimum operating frequency according to a preset frequency reduction rate, and controlling the compressor to operate at the minimum operating frequency; when the fourth operating frequency is equal to the minimum operating frequency, obtaining the current exhaust temperature of the compressor, and controlling the current exhaust temperature to decrease to a predetermined exhaust temperature according to a predetermined temperature reduction rate.

[0184] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the current speed of the indoor fan of the air conditioner; when the current speed is not equal to the maximum speed, controlling the indoor fan to increase its speed to the maximum speed at a predetermined speed increase rate, and controlling the indoor fan to operate at the maximum speed; when the current speed is equal to the maximum speed, controlling the air conditioner to operate according to the current operating mode.

[0185] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the control method of an air conditioner described above.

[0186] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0187] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0188] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0189] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0190] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0191] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0192] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0193] 1) By detecting the difference between the indoor ambient temperature and the set temperature, the indoor heat exchanger temperature, the rate of temperature drop in the indoor environment, and the difference between the indoor air dew point temperature and the indoor heat exchanger temperature, the current operating status is confirmed. The operating status of the air conditioning system is then regulated by adjusting the compressor frequency, exhaust temperature, and indoor fan speed, making the control more reasonable and intelligent, and solving the problem of falsely preventing freezing when there is no risk of freezing.

[0194] 2) Improved the reliability and safety of air conditioners.

[0195] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method of an air conditioner, characterized by, The method comprises: During operation of the air conditioner in a cooling mode, a first indoor environment temperature of a room where the air conditioner is located is obtained; When a first temperature difference between the first indoor environment temperature and a set temperature is greater than or equal to a first temperature difference threshold, an inner tube temperature of an indoor heat exchanger of the air conditioner is obtained, wherein the set temperature is a pre-set operating temperature of the air conditioner; When the inner tube temperature is less than a pre-set inner tube temperature, a dew point temperature of the room where the air conditioner is located is obtained; A second temperature difference between the dew point temperature and the inner tube temperature is determined; Based on a size relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold, an operating mode of the air conditioner is determined, wherein the second temperature difference threshold is greater than the third temperature difference threshold; The air conditioner is controlled to operate in the operating mode, When the second temperature difference is greater than or equal to the third temperature difference threshold and less than or equal to 0, the air conditioner is controlled to operate in a current operating mode; when the second temperature difference is less than the third temperature difference threshold, if the inner tube temperature is less than or equal to a freezing temperature of the indoor heat exchanger, a fourth operating frequency of a compressor of the air conditioner is obtained; when the fourth operating frequency is not equal to a minimum operating frequency, the compressor is controlled to decrease in frequency to the minimum operating frequency at a pre-set frequency decrease rate, and the compressor is controlled to operate at the minimum operating frequency; when the fourth operating frequency is equal to the minimum operating frequency, a current discharge temperature of the compressor is obtained, and the current discharge temperature is controlled to decrease to a pre-set discharge temperature at a pre-set temperature decrease rate, After the current discharge temperature is controlled to decrease to the pre-set discharge temperature at the second pre-set rate, the method further comprises: obtaining a current rotating speed of an indoor fan of the air conditioner; when the current rotating speed is not equal to a maximum rotating speed, the indoor fan is controlled to increase in rotating speed to the maximum rotating speed at a pre-set rotating speed increase rate, and the indoor fan is controlled to operate at the maximum rotating speed; when the current rotating speed is equal to the maximum rotating speed, the air conditioner is controlled to operate in the current operating mode, The method further comprises: when the second temperature difference is less than the second temperature difference threshold and greater than 0, a third operating frequency of a compressor of the air conditioner is obtained; when the third operating frequency is not equal to a maximum operating frequency, the compressor is controlled to increase in frequency to the maximum operating frequency at a second pre-set frequency increase rate, or the third operating frequency is increased by a pre-set frequency, The method further comprises: when the third operating frequency is equal to the maximum operating frequency, a current discharge temperature of the compressor is obtained; if the current discharge temperature is equal to a maximum discharge temperature, the air conditioner is controlled to operate in the current operating mode; if the current discharge temperature is not equal to the maximum discharge temperature, the current discharge temperature is controlled to increase to the maximum discharge temperature at a second pre-set temperature increase rate, or the current discharge temperature is increased by a pre-set temperature.

2. The control method of the air conditioner according to claim 1, characterized by, The method further comprises: when the first temperature difference value is less than the first temperature difference threshold and greater than a second temperature difference threshold, controlling the air conditioner to operate in a current operation mode, wherein the first temperature difference threshold is greater than the second temperature difference threshold.

3. The control method of the air conditioner according to claim 2, characterized by, Further comprising: when the first temperature difference value is less than or equal to the second temperature difference threshold, obtaining a first operating frequency of a compressor of the air conditioner; when the first operating frequency is not equal to a minimum operating frequency, controlling the compressor to decrease the operating frequency to the minimum operating frequency at a preset frequency decrease rate and controlling the compressor to operate at the minimum operating frequency; when the first operating frequency is equal to the minimum operating frequency, obtaining a current discharge temperature of the compressor and controlling the current discharge temperature to decrease to a predetermined discharge temperature at a predetermined temperature decrease rate.

4. The control method of the air conditioner according to claim 3, characterized by, Further comprising: after controlling the current discharge temperature to decrease to the predetermined discharge temperature at the second predetermined rate, obtaining a current rotating speed of an indoor fan of the air conditioner; when the current rotating speed is not equal to a minimum rotating speed, controlling the indoor fan to decrease the rotating speed to the minimum rotating speed at a predetermined rotating speed decrease rate and controlling the indoor fan to operate at the minimum rotating speed; when the current rotating speed is equal to the minimum rotating speed, controlling the air conditioner to operate in the current operation mode.

5. The control method of the air conditioner according to claim 1, wherein Further comprising: when the inner tube temperature is greater than the inner tube preset temperature, obtaining a second indoor environment temperature and a third indoor environment temperature of a room in which the air conditioner is located, wherein the second indoor environment temperature is a temperature collected at a time earlier than a temperature collection time of the third indoor environment temperature; determining a temperature decrease rate of the second indoor environment temperature to the third indoor environment temperature; when the temperature decrease rate is less than or equal to a preset temperature decrease rate, obtaining a second operating frequency of a compressor of the air conditioner; when the second operating frequency is not equal to a maximum operating frequency, controlling the compressor to increase the operating frequency to the maximum operating frequency at a first preset frequency increase rate and controlling the compressor to operate at the maximum operating frequency.

6. The control method of the air conditioner according to claim 5, characterized by, Further comprising: when the second operating frequency is equal to the maximum operating frequency, obtaining a current discharge temperature of the compressor; when the current discharge temperature is equal to a maximum discharge temperature, controlling the air conditioner to operate in a current operation mode; when the current discharge temperature is not equal to the maximum discharge temperature, controlling the current discharge temperature to increase to the maximum discharge temperature at a first predetermined temperature increase rate.

7. The control method of the air conditioner according to claim 5, wherein Further comprising: when the temperature decrease rate is greater than the preset temperature decrease rate, obtaining a third operating frequency of a compressor of the air conditioner; when the third operating frequency is not equal to a maximum operating frequency, controlling the compressor to increase to the maximum operating frequency at a second preset frequency increase rate or increasing the third operating frequency by a predetermined frequency.

8. The control method of the air conditioner according to claim 7, characterized by, Further comprising: when the third operating frequency is equal to the maximum operating frequency, obtaining a current discharge temperature of the compressor; when the current discharge temperature is equal to a maximum discharge temperature, controlling the air conditioner to operate in a current operation mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to increase to the highest exhaust temperature at a second predetermined temperature increasing rate, or increasing the current exhaust temperature by a predetermined temperature.

9. The control method of the air conditioner according to claim 1, characterized by, Further comprising: when the second temperature difference is greater than or equal to the second temperature difference threshold, obtaining a second operating frequency of a compressor of the air conditioner; when the second operating frequency is not equal to the highest operating frequency, controlling the compressor to increase the operating frequency to the highest operating frequency at a first preset frequency increasing rate, and controlling the compressor to operate at the highest operating frequency.

10. The control method of the air conditioner according to claim 9, wherein Further comprising: when the second operating frequency is equal to the highest operating frequency, obtaining a current exhaust temperature of the compressor; if the current exhaust temperature is equal to the highest exhaust temperature, controlling the air conditioner to operate in a current operating mode; if the current exhaust temperature is not equal to the highest exhaust temperature, controlling the current exhaust temperature to increase to the highest exhaust temperature at a first predetermined temperature increasing rate.

11. A control device for an air conditioner, characterized by comprising: Comprising: a first obtaining unit, configured to obtain a first indoor environment temperature of a room where the air conditioner is located during operation of the air conditioner in a cooling mode; a second obtaining unit, configured to obtain an inner tube temperature of an indoor heat exchanger of the air conditioner when a first temperature difference between the first indoor environment temperature and a set temperature is greater than or equal to a first temperature difference threshold, wherein the set temperature is a preset operating temperature of the air conditioner; a third obtaining unit, configured to obtain a dew point temperature of the room where the air conditioner is located when the inner tube temperature is less than a preset inner tube temperature; a first determining unit, configured to determine a second temperature difference between the dew point temperature and the inner tube temperature; a second determining unit, configured to determine an operating mode of the air conditioner based on a size relationship between the second temperature difference and a second temperature difference threshold and a third temperature difference threshold, wherein the second temperature difference threshold is greater than the third temperature difference threshold; a control unit, configured to control the air conditioner to operate in the operating mode. The control device of the air conditioner further comprises: a control unit, configured to control the air conditioner to operate in a current operating mode when the second temperature difference is greater than or equal to the third temperature difference threshold and less than or equal to 0; a fifteenth obtaining unit, configured to obtain a fourth operating frequency of a compressor of the air conditioner when the second temperature difference is less than the third temperature difference threshold and the inner tube temperature is less than or equal to a freezing temperature of the indoor heat exchanger; a control unit, configured to control the compressor to decrease the operating frequency to a lowest operating frequency at a preset frequency decreasing rate when the fourth operating frequency is not equal to the lowest operating frequency, and control the compressor to operate at the lowest operating frequency; and a control unit, configured to obtain a current exhaust temperature of the compressor when the fourth operating frequency is equal to the lowest operating frequency, and control the current exhaust temperature to decrease by a predetermined exhaust temperature at a predetermined temperature decreasing rate. The control device of the air conditioner further comprises: a sixteenth acquisition unit, configured to acquire a current rotating speed of an indoor fan of the air conditioner after controlling the current discharge temperature to decrease at a second predetermined rate to a predetermined discharge temperature; a control unit, configured to control the indoor fan to increase the rotating speed to a highest rotating speed at a predetermined rotating speed increasing rate and control the indoor fan to operate at the highest rotating speed when the current rotating speed is not equal to the highest rotating speed; a control unit, configured to control the air conditioner to operate at a current operation mode when the current rotating speed is equal to the highest rotating speed, The control device of the air conditioner further comprises: a thirteenth acquisition unit, configured to acquire a third operating frequency of a compressor of the air conditioner when the second temperature difference is less than a second temperature difference threshold and greater than 0; a control unit, configured to control the compressor to increase the operating frequency to a highest operating frequency at a second preset frequency increasing rate when the third operating frequency is not equal to the highest operating frequency, or the third operating frequency increases by a predetermined frequency, The control device of the air conditioner further comprises: a fourteenth acquisition unit, configured to acquire a current discharge temperature of the compressor when the third operating frequency is equal to the highest operating frequency; a control unit, configured to control the air conditioner to operate at a current operation mode when the current discharge temperature is equal to a highest discharge temperature; a control unit, configured to control the current discharge temperature to increase to the highest discharge temperature at a first predetermined temperature increasing rate when the current discharge temperature is not equal to the highest discharge temperature.

12. An air conditioner characterized by comprising: The air conditioner uses the control method of the air conditioner according to any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a stored program, wherein the program executes the control method of the air conditioner according to any one of claims 1 to 10.

14. A processor, comprising: The processor is configured to run a program, wherein the program executes the control method of the air conditioner according to any one of claims 1 to 10 when running.

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