Control method of air conditioner and air conditioner

Abstract

The invention discloses a control method of an air conditioner and the air conditioner, and belongs to the technical field of air conditioners. The control method comprises the steps that the current operation frequency of the compressor in the current starting operation stage and the current outdoor environment temperature detection value of the outdoor environment temperature sensor are obtained; the historical operation frequency of the compressor in the historical starting operation stage and the outdoor temperature detection value before historical shutdown and the outdoor temperature detection value after historical shutdown of an outdoor environment temperature sensor are determined so as to determine a correction coefficient; the current outdoor environment temperature detection value is corrected according to the correction coefficient and the current operation frequency, and the outdoor environment temperature is obtained; and the air conditioner is controlled according to the outdoor environment temperature. By determining the heat radiation degree of the outdoor environment temperature sensor under different operation frequencies of the compressor, the current detection value of the outdoor environment temperature sensor is corrected according to the current operation frequency of the compressor, the more accurate outdoor temperature is obtained, and the control precision of the air conditioner is improved.

Description

Technical Field

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

[0002] When the air conditioner is running, it usually needs to use the outdoor ambient temperature sensor to obtain the outdoor ambient temperature, and then control it according to the target indoor environment set by the user. At present, the outdoor ambient temperature sensor is close to the outdoor heat exchanger, and its detection value is easily affected by the heat radiation of the outdoor heat exchanger, resulting in a deviation between the outdoor temperature detected by the outdoor ambient temperature sensor and the actual outdoor temperature, which in turn affects the control accuracy of the air conditioner. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a control method and an air conditioner for an air conditioner, which determines the degree of heat radiation received by an outdoor ambient temperature sensor at different operating frequencies of the compressor, and then corrects the current detection value of the outdoor ambient temperature sensor to obtain a more accurate outdoor temperature, thereby improving the control accuracy of the air conditioner.

[0004] In a first aspect, the present application provides a method for controlling an air conditioner, the air conditioner comprising:

[0005] A compressor, an outdoor heat exchanger and an indoor heat exchanger connected in a circulation loop;

[0006] The outdoor ambient temperature sensor is integrated with the outdoor heat exchanger in the outdoor unit;

[0007] An outdoor fan is provided corresponding to the outdoor heat exchanger and is used to provide air volume to the outdoor heat exchanger;

[0008] The compressor includes multiple start-stop cycles during operation, and the start-stop cycle includes a startup operation phase and a subsequent shutdown phase;

[0009] Control methods include:

[0010] Obtaining the current operating frequency of the compressor during the current startup operation phase, and the current outdoor ambient temperature detection value of the outdoor ambient temperature sensor during the current startup operation phase;

[0011] Determine, within a historical start-stop cycle period before the current startup operation stage, a historical operation frequency of the compressor within a historical startup operation stage, and a historical pre-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor within the historical startup operation stage and a historical post-shutdown outdoor temperature detection value within the historical shutdown stage;

[0012] Determine a correction coefficient based on the historical operating frequency, the detected value of the outdoor temperature before historical shutdown, and the detected value of the outdoor temperature after historical shutdown. The correction coefficient reflects the mapping relationship between the operating frequency of the compressor and the deviation value of the outdoor ambient temperature. The deviation value of the outdoor ambient temperature is equal to the difference between the detected value of the outdoor temperature before historical shutdown and the detected value of the outdoor temperature after historical shutdown within the same start-stop cycle;

[0013] Correct the detected value of the current outdoor ambient temperature according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature;

[0014] Control the air conditioner according to the outdoor ambient temperature.

[0015] According to an embodiment of the present application, the historical start-stop cycle includes a first start-stop cycle and a second start-stop cycle, and the correction coefficient includes a first correction coefficient. The first correction coefficient is determined according to the following formula:

[0016] A1 = 丨(T1a - T1b) - (T2a - T2b)丨÷丨Y1 - Y2丨

[0017] Wherein, A1 is the first correction coefficient, T1a is the detected value of the outdoor temperature before historical shutdown within the first start-stop cycle, T1b is the detected value of the outdoor temperature after historical shutdown within the first start-stop cycle, T2a is the detected value of the outdoor temperature before historical shutdown within the second start-stop cycle, T2b is the detected value of the outdoor temperature after historical shutdown within the second start-stop cycle, Y1 is the historical operating frequency within the first start-stop cycle, and Y2 is the historical operating frequency within the second start-stop cycle.

[0018] According to an embodiment of the present application, correcting the detected value of the current outdoor ambient temperature according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature includes:

[0019] When the air conditioner is in the cooling mode, determine the outdoor ambient temperature based on the following formula:

[0020] Tx = Tz - A × Y;

[0021] When the air conditioner is in the heating mode, determine the outdoor ambient temperature based on the following formula:

[0022] Tx = Tz + A × Y;

[0023] Wherein, Tx is the outdoor ambient temperature, Tz is the detected value of the current outdoor ambient temperature, A is the correction coefficient, and Y is the current operating frequency.

[0024] According to one embodiment of the present application, the number of historical start-stop cycle periods is two, the first start-stop cycle period is the previous historical start-stop cycle period adjacent to the current startup operation phase, and the second start-stop cycle period is the previous historical start-stop cycle period adjacent to the first start-stop cycle period.

[0025] According to one embodiment of the present application, when the air conditioner is powered on again or the operating mode is changed, the correction coefficient is reset to zero.

[0026] According to one embodiment of the present application, the correction coefficient in the first start-stop cycle and the second start-stop cycle after the air conditioner is powered on for the first time or the correction coefficient is reset to zero is zero.

[0027] According to one embodiment of the present application, the control method further includes:

[0028] Determining the operating frequency of the compressor within a first period before the compressor switches from the startup operation phase to the shutdown phase;

[0029] Determine the outdoor temperature detection value of the outdoor ambient temperature sensor before shutdown within the first possible time;

[0030] When the compressor enters the shutdown stage and after a second time has passed, the post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor is determined.

[0031] According to an embodiment of the present application, the value range of the first time is between 1 minute and 5 minutes, and the value range of the second time is between 1 minute and 5 minutes.

[0032] According to one embodiment of the present application, determining the operating frequency of the compressor within a first time before the compressor switches from the startup operation phase to the shutdown phase includes:

[0033] During the period from receiving the stop command to the compressor executing the stop control, determine the operating frequency of the compressor'

[0034] When the compressor enters the shutdown stage and after a second time has passed, a post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor is determined, including:

[0035] After the compressor enters the shutdown stage and the outdoor fan ends the residual heat blowing control, the post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor is determined.

[0036] In a second aspect, the present application provides an air conditioner, the air conditioner comprising:

[0037] A compressor, an outdoor heat exchanger and an indoor heat exchanger connected in a circulation loop;

[0038] The outdoor ambient temperature sensor is integrated with the outdoor heat exchanger in the outdoor unit;

[0039] Indoor ambient temperature sensor, integrated with indoor heat exchanger in the indoor unit;

[0040] An outdoor fan is provided corresponding to the outdoor heat exchanger and is used to provide air volume to the outdoor heat exchanger;

[0041] An indoor fan is provided corresponding to the indoor heat exchanger and is used to provide air volume to the indoor heat exchanger;

[0042] The controller is connected to the compressor and the outdoor ambient temperature sensor and is configured to implement the control method as described above.

[0043] According to the control method and air conditioner of the air conditioner of the present application, by recording the operating frequency of the compressor before shutdown, and the detection value of the outdoor ambient temperature sensor before and after shutdown, the degree of heat radiation received by the outdoor ambient temperature sensor under different operating frequencies of the compressor is determined, and then the current detection value of the outdoor ambient temperature sensor is corrected according to the current operating frequency of the compressor to obtain a more accurate outdoor temperature and improve the control accuracy of the air conditioner.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 It is one of the flow charts of the control method of the air conditioner provided in the embodiment of the present application;

[0047] Figure 2 This is the second flow chart of the air conditioner control method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0049] In the description, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the numerical descriptors used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0050] In addition, descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] As an example, the air conditioner may include a compressor, an outdoor heat exchanger, an indoor heat exchanger, an outdoor fan, an indoor fan, a controller, an indoor ambient temperature sensor, an outdoor ambient temperature sensor, an outdoor fan driver, an indoor fan driver, various valves such as a four-way valve and an outdoor electronic expansion valve, and an input part, etc. The compressor, the outdoor heat exchanger, and the indoor heat exchanger form a circulation loop to circulate the heat exchange medium. The circulation loop is provided with various valves such as a four-way valve and an outdoor electronic expansion valve to control the flow direction of the heat exchange medium.

[0052] The controller is respectively connected to the compressor, the indoor ambient temperature sensor, the outdoor ambient temperature sensor, the outdoor fan driver, the indoor fan driver, the four-way valve and the outdoor electronic expansion valve to control the operation of the corresponding devices or receive feedback information of the corresponding devices.

[0053] The air conditioner usually consists of an indoor unit and an outdoor unit. The compressor, outdoor heat exchanger, outdoor fan, controller, outdoor ambient temperature sensor and outdoor fan driver are integrated in the outdoor unit; the indoor heat exchanger, indoor fan, indoor ambient temperature sensor and indoor fan driver are integrated in the indoor unit. Due to the volume limitation of the outdoor unit, the installation position of the outdoor ambient temperature sensor is limited and is easily affected by the heat radiation of the outdoor heat exchanger. For the convenience of installation, the outdoor ambient temperature sensor can even be fixed on the surface of the outdoor heat exchanger through a structural member.

[0054] When the air conditioner is not running, the surface temperature of the outdoor heat exchanger is the same as the outdoor ambient temperature, and the ambient temperature detected by the outdoor ambient temperature sensor is accurate. The surface temperature of the outdoor heat exchanger Ty = the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz.

[0055] When the air conditioner is running in cooling mode, the high-temperature and high-pressure gas discharged from the compressor passes through the four-way reversing valve to the outdoor heat exchanger. The high-temperature and high-pressure gas exchanges heat with the outdoor air through the outdoor heat exchanger and becomes a high-pressure and medium-temperature liquid, and then flows according to the cooling mode cycle diagram.

[0056] At this time, since the outdoor heat exchanger surface temperature Ty>outdoor ambient temperature Tx, the outdoor ambient temperature sensor will be affected by the thermal radiation of the outdoor heat exchanger surface temperature, resulting in the outdoor heat exchanger surface temperature Ty≥current outdoor ambient temperature detection value Tz≥outdoor ambient temperature Tx.

[0057] When the air conditioner is running in heating mode, the high-temperature and high-pressure gas discharged from the compressor passes through the four-way reversing valve to the indoor heat exchanger. The high-temperature and high-pressure gas exchanges heat with the indoor air through the indoor heat exchanger and becomes a high-pressure and medium-temperature liquid. It is then throttled by the expansion valve to become a low-temperature and low-pressure liquid. It is then exchanged with the outdoor air through the outdoor heat exchanger to become a low-temperature and low-pressure gas, and then flows according to the heating cycle diagram.

[0058] At this time, since the outdoor heat exchanger surface temperature Ty<outdoor ambient temperature Tx, the outdoor ambient temperature sensor will be affected by the thermal radiation of the outdoor heat exchanger surface temperature, resulting in the outdoor heat exchanger surface temperature Ty≤current outdoor ambient temperature detection value Tz≤outdoor ambient temperature Tx.

[0059] Therefore, the detection value of the outdoor ambient temperature sensor is easily deviated under the influence of the heat radiation of the outdoor heat exchanger. In the related art, the temperature detected by the outdoor ambient temperature sensor is usually directly used as the air conditioner operation control parameter, but this method easily leads to inaccurate detection data.

[0060] To solve the above problems, the present application proposes a control method and an air conditioner for an air conditioner, which records the operating frequency of the compressor before shutdown, and the detection value of the outdoor ambient temperature sensor before and after shutdown, so as to determine the degree of heat radiation received by the outdoor ambient temperature sensor under different operating frequencies of the compressor, and then corrects the current detection value of the outdoor ambient temperature sensor according to the current operating frequency of the compressor to obtain a more accurate outdoor temperature and improve the control accuracy of the air conditioner.

[0061] Reference Figure 1 , Figure 1A control process of an air conditioner is shown, and an embodiment of the present application proposes a control method of an air conditioner. The specific structure of the air conditioner can refer to the above, and this embodiment will not be repeated here. The control method includes step 10, step 20, step 30, step 40 and step 50.

[0062] Step 10: obtaining the current operating frequency of the compressor in the current startup operation phase, and the current outdoor ambient temperature detection value of the outdoor ambient temperature sensor in the current startup operation phase;

[0063] Step 20, determining the historical operation frequency of the compressor in the historical startup operation stage, the historical pre-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor in the historical startup operation stage, and the historical post-shutdown outdoor temperature detection value in the historical shutdown stage within the historical start-stop cycle period before the current startup operation stage;

[0064] Step 30, determining a correction coefficient according to the historical operating frequency, the historical outdoor temperature detection value before shutdown, and the historical outdoor temperature detection value after shutdown, wherein the correction coefficient reflects the mapping relationship between the operating frequency of the compressor and the outdoor ambient temperature deviation value, and the outdoor ambient temperature deviation value is equal to the difference between the historical outdoor temperature detection value before shutdown and the historical outdoor temperature detection value after shutdown in the same start-stop cycle;

[0065] Step 40: Correct the current outdoor ambient temperature detection value according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature;

[0066] Step 50: Control the air conditioner according to the outdoor ambient temperature.

[0067] It should be noted that the execution subject of the control method in this embodiment may be a controller, and of course may also be other devices. The control method provided in this embodiment is described below with the controller as the execution subject.

[0068] The acquisition time of the current operating frequency and the current outdoor ambient temperature detection value can be the same time, thereby establishing an association between the current operating frequency and the current outdoor temperature detection value before shutdown, which is convenient for subsequent correction of the current outdoor temperature detection value before shutdown based on the current operating frequency.

[0069] It can be understood that, since the historical outdoor temperature after shutdown can actually represent the actual outdoor ambient temperature in the corresponding historical start-stop cycle, the difference between the historical outdoor temperature after shutdown and the historical outdoor temperature before shutdown is equivalent to the heat radiation caused by the outdoor heat exchanger, that is, caused by the operation of the compressor. Therefore, the correction coefficient can be determined by the historical operating frequency of the compressor and the difference.

[0070] During the operation of the air conditioner, the compressor has multiple start-stop cycles. For example, when the indoor ambient temperature does not reach the target indoor ambient temperature, the controller controls the compressor to start and run to adjust the indoor ambient temperature to the target indoor ambient temperature. At this time, the compressor is in the startup operation stage. Subsequently, when the indoor ambient temperature reaches the target indoor ambient temperature, the controller can control the compressor to stop to avoid excessive cooling or heating of the indoor environment, and also to reduce energy consumption. At this time, the compressor enters the shutdown stage from the startup operation stage. Later, during the compressor shutdown period, when the indoor ambient temperature deviates from the target indoor ambient temperature by a certain threshold, the controller controls the compressor to restart to readjust the indoor ambient temperature to the target indoor ambient temperature, and this cycle continues.

[0071] As an example, after the air conditioner is powered on, starting from the first start-stop cycle of the compressor and in each subsequent start-stop cycle, the operating frequency of the compressor and the corresponding outdoor ambient temperature sensor are recorded.

[0072] It should be noted that during the startup operation phase, the recording time of the compressor operation frequency is the same as the recording time of the outdoor temperature detection value before shutdown of the outdoor ambient temperature sensor, thereby establishing a correlation between the compressor operation frequency and the outdoor temperature detection value before shutdown.

[0073] In some embodiments, the process of determining the operating frequency of the compressor in the startup operation phase, and the pre-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor in the startup operation phase and the post-shutdown outdoor temperature detection value in the shutdown phase may include:

[0074] Determine the operating frequency of the compressor within the first time before entering the shutdown stage from the startup operation stage, as well as the outdoor temperature detection value before shutdown of the outdoor ambient temperature sensor within the first time and the outdoor temperature detection value after shutdown within the second time after the compressor enters the shutdown stage.

[0075] In this embodiment, the post-shutdown outdoor temperature detection value is recorded after a period of time has passed since the compressor entered the shutdown stage. This period of time allows the temperature of the outdoor heat exchanger to return to normal, so that the post-shutdown outdoor temperature detection value is recorded without the outdoor temperature sensor being subjected to heat radiation.

[0076] The compressor operating frequency during the startup phase and the outdoor temperature detection value before shutdown are recorded in a time period close to the shutdown phase. This ensures that the acquisition time of the two sets of data before and after shutdown in the same start-stop cycle is close, avoiding deviations caused by changes in the outdoor environment itself.

[0077] As an example, the value range of the first time is between 1 minute and 5 minutes, and the value range of the second time is between 1 minute and 5 minutes. The specific values can be set according to requirements, and this embodiment does not limit this.

[0078] In some embodiments, the first time is the time from when the air conditioner receives a shutdown instruction to when the compressor shuts down; the second time is the time when the outdoor fan dissipates the remaining heat for the outdoor heat exchanger after the compressor shuts down.

[0079] It can be understood that after the air conditioner receives a shutdown instruction, the controller responds to the shutdown instruction to control the compressor to start shutting down. After the compressor executes the shutdown, the operating frequency gradually decreases. Thus, within the time from receiving the shutdown instruction to the compressor executing the shutdown, the operating frequency of the compressor is the last operating frequency within the current start-stop cycle, and thus the operating frequency closest to shutdown in time can be obtained.

[0080] In this embodiment, after the compressor shuts down, the outdoor fan can blow air towards the outdoor heat exchanger to dissipate the excess heat or cold, so that the surface temperature thereof is equal to the actual outdoor ambient temperature. Thus, by recording the outdoor temperature detection value after shutdown after the outdoor heat exchanger dissipates the remaining heat, it can be ensured that the outdoor temperature detection value after shutdown is equal to the actual outdoor ambient temperature.

[0081] It can be understood that during each startup and operation stage, the operating frequency of the compressor usually needs to be adjusted in real time, and the outdoor ambient temperature is required as a reference during this adjustment process. The outdoor ambient temperature in this embodiment refers to the corrected value after correcting the outdoor temperature detection value fed back by the outdoor ambient temperature sensor.

[0082] In some embodiments, fitting calculations can be performed based on the historical operating frequencies, the historical outdoor temperature detection values before shutdown, and the historical outdoor temperature detection values after shutdown within multiple historical start-stop cycles, so as to determine the correction coefficient. And after each start-stop cycle, the operating frequency, the outdoor temperature detection value before shutdown, and the outdoor temperature detection value after shutdown within this start-stop cycle are added to the fitting, thereby improving the accuracy of the correction coefficient.

[0083] In some other embodiments, the historical start-stop cycle includes a first start-stop cycle and a second start-stop cycle, the correction coefficient includes a first correction coefficient, and the first correction coefficient is determined according to the following formula:

[0084] A1 = 丨(T1a - T1b) - (T2a - T2b)丨÷丨Y1 - Y2丨

[0085] Among them, A1 is the first correction coefficient, T1a is the historical outdoor temperature detection value before shutdown in the first start-stop cycle, T1b is the historical outdoor temperature detection value after shutdown in the first start-stop cycle, T2a is the historical outdoor temperature detection value before shutdown in the second start-stop cycle, T2b is the historical outdoor temperature detection value after shutdown in the second start-stop cycle, Y1 is the historical operating frequency in the first start-stop cycle, and Y2 is the historical operating frequency in the second start-stop cycle.

[0086] T1a-T1b is the first difference between the outdoor temperature detection values ​​before and after the shutdown in the first start-stop cycle, T2a-T2b is the second difference between the outdoor temperature detection values ​​before and after the shutdown in the second start-stop cycle, Y1-Y2 is the third difference between the historical operating frequency in the first start-stop cycle and the historical operating frequency in the second start-stop cycle. The first correction coefficient is the ratio of the fourth difference between the first difference and the second difference to the third difference.

[0087] In this embodiment, two start-stop cycles are used to calculate the correction coefficient. Compared with the method of directly fitting multiple start-stop cycles, the amount of calculation is smaller and the impact on the operating load of the controller is not significant.

[0088] In other embodiments, a plurality of start-stop cycles may be divided into a plurality of groups in pairs, and then the correction coefficients calculated in each group are averaged to serve as the final correction coefficient to correct the current outdoor ambient temperature detection value.

[0089] In some embodiments, the number of historical start-stop cycles is two, the first start-stop cycle is the previous historical start-stop cycle adjacent to the current startup operation phase, and the second start-stop cycle is the previous historical start-stop cycle adjacent to the first start-stop cycle.

[0090] It is understandable that when the surface temperature of the outdoor heat exchanger remains unchanged, different outdoor temperatures will lead to different deviations in the detection value of the outdoor temperature sensor. For example, when the surface temperature of the outdoor heat exchanger is 40°C, if the outdoor temperature is 10°C, the detection value of the outdoor temperature sensor may be 20°C, and the deviation is 10°C; if the outdoor temperature is 17°C, the detection value of the outdoor temperature sensor may be 23°C, and the deviation is 6°C. It can be seen that the change of the outdoor temperature itself will cause deviations in the calculation of the correction coefficient.

[0091] This implementation only uses the two most recent historical start-stop cycles to calculate the correction coefficient, which can avoid the possibility that the earlier historical start-stop cycles may cause significant changes in the outdoor environment itself, thereby causing deviations in the calculation of the correction coefficient; and can also reduce the amount of calculation.

[0092] In some embodiments, the correction factor is reset to zero when the air conditioner is powered on again or the operating mode is changed.

[0093] It is understandable that powering on the air conditioner again or changing the operating mode usually means that the outdoor environment may have changed; or the different operating modes also cause the relationship between the outdoor heat exchanger and the outdoor ambient temperature to change. Therefore, in order to ensure the accuracy of the correction coefficient, it needs to be reset and recalculated.

[0094] In some embodiments, the correction coefficient is zero in the first start-stop cycle and the second start-stop cycle after the air conditioner is powered on for the first time or the correction coefficient is reset to zero.

[0095] In this embodiment, when the correction coefficient starts to be calculated, the detection value of the outdoor temperature sensor is not corrected in the first start-stop cycle and the second start-stop cycle. Due to the insufficient number of samples, a larger error caused by the correction is avoided.

[0096] Of course, in other embodiments, the correction coefficient of the second start-stop cycle can use the ratio of the difference between the outdoor temperature detection values ​​before and after the shutdown in the first start-stop cycle and the operating frequency before the compressor is shut down as the correction coefficient.

[0097] In some embodiments, the current outdoor ambient temperature detection value is corrected according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature, including:

[0098] When the air conditioner is in cooling mode, the outdoor ambient temperature is determined based on the following formula:

[0099] Tx = Tz - A × Y;

[0100] When the air conditioner is in heating mode, the outdoor ambient temperature is determined based on the following formula:

[0101] Tx=Tz+A×Y;

[0102] Wherein, Tx is the outdoor ambient temperature, Tz is the current outdoor ambient temperature detection value, A is the correction coefficient, and Y is the current operating frequency.

[0103] When the air conditioner is in cooling mode, the detection value of the outdoor ambient temperature sensor is usually higher than the actual outdoor ambient temperature, so the detection value needs to be corrected to a smaller value. When the air conditioner is in cooling mode, the detection value of the outdoor ambient temperature sensor is usually lower than the actual outdoor ambient temperature, so the detection value needs to be corrected to a larger value.

[0104] In step 50, the controller may control the compressor, the outdoor fan, the indoor fan, the four-way valve or the outdoor electronic expansion valve in the air conditioner based on the outdoor ambient temperature to achieve corresponding control purposes.

[0105] As an example, the controller can determine the operating parameters of each component according to the target indoor ambient temperature and the outdoor ambient temperature. The target indoor ambient temperature can be specified by the user, which refers to the temperature to which the air conditioner needs to adjust the indoor environment. Of course, the control can also be combined with the indoor ambient temperature. The size of the indoor ambient temperature and the target indoor ambient temperature determines whether the air conditioner operates in heating mode or cooling mode. The greater the difference between the outdoor ambient temperature and the indoor ambient temperature, the higher the compressor operation frequency.

[0106] Reference Figure 2 , Figure 2 A control flow is shown. As an example, the air conditioner is operated in cooling mode. Step 101, at the beginning, the air conditioner is powered on, the compressor is not started, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz-A1×the current operating frequency Y, and the correction coefficient A0=0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz.

[0107] Step 102, the air conditioner starts to run. During the first startup and shutdown phase of the compressor, since there is no previous start-stop cycle, the correction coefficient A1 is set to 0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz. In addition, the outdoor ambient temperature detection value T1a within the first time before the compressor is shut down for the first time, the operating frequency Y1 of the compressor, and the outdoor ambient temperature detection value T1b after the compressor is shut down for the first time and after the second time.

[0108] Step 103, the air conditioner continues to run, step 13, during the second startup and shutdown phase of the compressor, the correction coefficient A2 is still set to 0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz. In addition, the outdoor ambient temperature detection value T2a within the first time before the compressor is shut down for the second time, the operating frequency Y2 of the compressor, and the outdoor ambient temperature detection value T2b after the compressor is shut down for the second time and after the second time.

[0109] Step 104: The air conditioner continues to run. During the third startup and operation stage of the compressor, the correction coefficient A3 is determined according to the following formula: A3 = |(T1a - T1b) - (T2a - T2b)| ÷ |Y1 - Y2|. The outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz - A3 × the current operating frequency Y. During the third shutdown of the compressor, the correction coefficient A3 changes to 0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz. Also, determine the outdoor ambient temperature detection value T3a within the first period before the third shutdown of the compressor, the operating frequency Y3 of the compressor, and the outdoor ambient temperature detection value T3b after the third shutdown of the compressor and after the second period.

[0110] Step 105: The air conditioner continues to run. During the fourth startup and operation stage of the compressor, the correction coefficient A4 is determined according to the following formula: A4 = |(T2a - T2b) - (T3a - T3b)| ÷ |Y2 - Y3|. The outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz - A4 × the current operating frequency Y. During the fourth shutdown of the compressor, the correction coefficient A4 changes to 0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz. Also, determine the outdoor ambient temperature detection value T4a within the first period before the fourth shutdown of the compressor, the operating frequency Y4 of the compressor, and the outdoor ambient temperature detection value T4b after the fourth shutdown of the compressor and after the second period.

[0111] Step 1NN: After that, the air conditioner continues to run. During the Nth startup and operation stage of the compressor, the correction coefficient AN is determined according to the following formula: AN = |(T(N - 2)a - T(N - 2)b) - (T(N - 1)a - T(N - 1)b)| ÷ |Y(N - 2) - Y(N - 1)|. The outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz - AN × the current operating frequency Y. During the Nth shutdown of the compressor, the correction coefficient AN changes to 0, that is, the outdoor ambient temperature Tx = the current outdoor ambient temperature detection value Tz. Also, determine the outdoor ambient temperature detection value TNa within the first period before the Nth shutdown of the compressor, the operating frequency YN of the compressor, and the outdoor ambient temperature detection value TNb after the fourth shutdown of the compressor and after the second period.

[0112] Step 200: In addition, during the operation of the air conditioner, when power is reapplied or the mode changes (such as from cooling to heating or from heating to cooling), reset the correction coefficient and repeat the above sequence starting from Step 102, the first startup and the first stop of the compressor.

[0113] An embodiment of the present application also provides an air conditioner, which includes: a compressor, an outdoor heat exchanger and an indoor heat exchanger connected in a circulation loop; an outdoor ambient temperature sensor, which is integrated with the outdoor heat exchanger in the outdoor unit; an indoor ambient temperature sensor, which is integrated with the indoor heat exchanger in the indoor unit; an outdoor fan, which is arranged corresponding to the outdoor heat exchanger and is used to provide air volume to the outdoor heat exchanger; an indoor fan, which is arranged corresponding to the indoor heat exchanger and is used to provide air volume to the indoor heat exchanger; a controller, which is connected to the compressor and the outdoor ambient temperature sensor and is configured to implement the control method as described above.

[0114] Among them, the specific process and principle of the control method can refer to the above, and the control method implemented by the controller can be the control method mentioned in the above embodiments, which also has corresponding technical effects and will not be repeated here.

[0115] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0116] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes: A compressor, an outdoor heat exchanger, and an indoor heat exchanger connected to form a circulation loop; An outdoor ambient temperature sensor integrated with the outdoor heat exchanger in the outdoor unit; An outdoor fan correspondingly arranged with the outdoor heat exchanger for providing air volume to the outdoor heat exchanger; Wherein, during operation, the compressor includes a plurality of start-stop cycle periods, and each start-stop cycle period includes a starting and running stage and a subsequent stopping stage; The control method includes: Obtaining the current operating frequency of the compressor during the current starting and running stage, and the current outdoor ambient temperature detection value of the outdoor ambient temperature sensor during the current starting and running stage; Determining, within the historical start-stop cycle period before the current starting and running stage, the historical operating frequency of the compressor during the historical starting and running stage, and the historical outdoor temperature detection value before stopping and the historical outdoor temperature detection value after stopping of the outdoor ambient temperature sensor during the historical stopping stage; Determining a correction coefficient according to the historical operating frequency, the historical outdoor temperature detection value before stopping, and the historical outdoor temperature detection value after stopping. The correction coefficient reflects the mapping relationship between the operating frequency of the compressor and the outdoor ambient temperature deviation value, and the outdoor ambient temperature deviation value is equal to the difference between the historical outdoor temperature detection value before stopping and the historical outdoor temperature detection value after stopping within the same start-stop cycle period; Correcting the current outdoor ambient temperature detection value according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature; Controlling the air conditioner according to the outdoor ambient temperature.

2. The control method according to claim 1, characterized in that: The historical start-stop cycle period includes a first start-stop cycle period and a second start-stop cycle period, and the correction coefficient includes a first correction coefficient, and the first correction coefficient is determined according to the following formula: A1 = 丨(T1a - T1b) - (T2a - T2b)丨÷丨Y1 - Y2丨 Wherein, A1 is the first correction coefficient, T1a is the historical outdoor temperature detection value before stopping within the first start-stop cycle period, T1b is the historical outdoor temperature detection value after stopping within the first start-stop cycle period, T2a is the historical outdoor temperature detection value before stopping within the second start-stop cycle period, T2b is the historical outdoor temperature detection value after stopping within the second start-stop cycle period, Y1 is the historical operating frequency within the first start-stop cycle period, and Y2 is the historical operating frequency within the second start-stop cycle period.

3. The control method according to claim 2, characterized in that: The step of correcting the current outdoor ambient temperature detection value according to the correction coefficient and the current operating frequency to obtain the outdoor ambient temperature includes: When the air conditioner is in the cooling mode, determining the outdoor ambient temperature based on the following formula: Tx = Tz - A × Y; When the air conditioner is in the heating mode, determining the outdoor ambient temperature based on the following formula: Tx = Tz + A × Y; Wherein, Tx is the outdoor ambient temperature, Tz is the current outdoor ambient temperature detection value, A is the correction coefficient, and Y is the current operating frequency.

4. The control method according to claim 2, characterized in that: The number of the historical start-stop cycle periods is two, the first start-stop cycle period is the previous historical start-stop cycle period adjacent to the current startup operation phase, and the second start-stop cycle period is the previous historical start-stop cycle period adjacent to the first start-stop cycle period.

5. The control method according to claim 2, characterized in that: When the air conditioner is powered on again or the operation mode is changed, the correction coefficient is reset to zero.

6. The control method according to claim 5, characterized in that: The correction coefficient in the first start-stop cycle and the second start-stop cycle after the air conditioner is powered on for the first time or the correction coefficient is reset to zero is zero.

7. The control method according to any one of claims 1 to 6, characterized in that: The control method further includes: Determining the operating frequency of the compressor within a first time before the compressor switches from the startup operation phase to the shutdown phase; During the first time, determining a pre-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor; After the compressor enters the shutdown stage and a second time has passed, a post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor is determined.

8. The control method according to claim 7, characterized in that: The first time ranges from 1 minute to 5 minutes, and the second time ranges from 1 minute to 5 minutes.

9. The control method according to claim 7, characterized in that: The step of determining the operating frequency of the compressor within a first time before the compressor switches from the startup operation phase to the shutdown phase includes: During the period from when the stop command is received to when the compressor performs stop control, the operating frequency of the compressor is determined. The step of determining the post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor after the compressor enters the shutdown stage and a second time has passed comprises: After the compressor enters the shutdown stage and the outdoor fan finishes executing the residual heat blowing control, a post-shutdown outdoor temperature detection value of the outdoor ambient temperature sensor is determined.

10. An air conditioner, characterized in that: The air conditioner comprises: A compressor, an outdoor heat exchanger and an indoor heat exchanger connected in a circulation loop; An outdoor ambient temperature sensor is integrated with the outdoor heat exchanger in the outdoor unit; An indoor ambient temperature sensor is integrated with the indoor heat exchanger in the indoor unit; an outdoor fan, arranged corresponding to the outdoor heat exchanger, and used to provide air volume to the outdoor heat exchanger; an indoor fan, arranged corresponding to the indoor heat exchanger, and used to provide air volume to the indoor heat exchanger; A controller is connected to the compressor and the outdoor ambient temperature sensor and is configured to implement the control method according to any one of claims 1-9.

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