Air conditioner and method for controlling operating frequency of compressor thereof

Abstract

The present invention relates to an air conditioner and a method for controlling the operating frequency of its compressor. This method enables the controller to detect the rate of change of the indoor ambient temperature after the air conditioner shuts down at a desired temperature, determine the actual indoor heat load, and adjust the compressor to an appropriate operating frequency when the compressor restarts cooling or heating operation. This ensures that the cooling and heating amounts generated by the compressor are close to the actual indoor cooling and heating loads, minimizing subsequent fluctuations in the indoor ambient temperature and improving the thermal comfort of the indoor environment. This method effectively addresses the problem of periodic fluctuations in the indoor ambient temperature caused by the periodic shutdown and restart of the compressor after the air conditioner reaches a preset temperature, which in turn affects the indoor thermal comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to an air conditioner and a method for controlling the operating frequency of a compressor thereof. Background Art

[0002] Existing variable frequency air conditioners can adjust the actual output capacity of the air conditioner by adjusting the operating speed of the compressor according to the actual heat load of the indoor environment space, thereby achieving the purpose of regulating indoor environment parameters such as temperature and humidity.

[0003] When the actual heat load of the indoor environment space is small, the compressor can stop running. When the indoor temperature rises to a certain value (cooling operation mode) or drops to a certain value (heating operation mode), the compressor restarts. This may cause the compressor to start and stop periodically, and the indoor environment temperature will also fluctuate periodically, affecting the thermal comfort of the indoor environment. Summary of the Invention

[0004] In order to solve the above problems, the first purpose of the present invention is to provide a method for controlling the operating frequency of an air conditioner compressor, which can solve the problem that after the air conditioner reaches a preset temperature, the compressor periodically shuts down and starts running, causing periodic fluctuations in the indoor ambient temperature and affecting the thermal comfort of the indoor environment; the second purpose of the present invention is to provide an air conditioner with the above-mentioned method for controlling the operating frequency of the compressor.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a method for controlling the operating frequency of an air conditioner compressor, applied to an air conditioner, the air conditioner comprising a controller, an indoor unit and an outdoor unit; the indoor unit comprising an indoor heat exchanger, an indoor ambient temperature sensor and an indoor fan; the outdoor unit comprising a compressor, a four-way reversing valve, an outdoor heat exchanger, an outdoor fan and an outdoor throttling mechanism for controlling flow; the indoor heat exchanger and the outdoor heat exchanger form a loop through a first refrigerant linking pipe and a second refrigerant linking pipe, the compressor and the outdoor throttling mechanism being arranged in the above-mentioned loop, the four-way reversing valve being used to switch the valve port so that the air conditioner has a cooling mode and a heating mode; the control method is characterized in that the steps are as follows:

[0006] Step 1: The air conditioner is turned on, and the cooling or heating mode is turned on. The user inputs the set operating temperature Ts and the set indoor fan operating speed Rs on the controller. The air conditioner receives the set Ts and Rs and operates;

[0007] Step 2: After the air conditioner has been running for a period of time, the controller reads the current indoor ambient temperature Tr collected by the indoor ambient temperature sensor (102). The controller determines whether Tr and Ts meet condition 1, that is, whether Tr is close to the set operating temperature Ts. If so, the controller proceeds to the next step. If not, the controller determines whether the user has modified the set temperature parameter of the air conditioner. If so, the controller returns to step 1. If not, the controller continues to operate according to the setting.

[0008] Step 3: The controller determines whether Tr and Ts meet condition 2, that is, whether Tr reaches the set operating temperature Ts. If so, the controller controls the air conditioner to enter the temperature shutdown state and records the current compressor operating frequency Fs and indoor ambient temperature Trs, and the compressor stops running; if not, the controller adjusts the speed of the indoor fan to the minimum speed Rmin;

[0009] Step 4: Count the operating time t in the temperature-reaching shutdown state, and judge whether the time t reaches the preset threshold value α. If T≥α, the controller re-reads the current indoor ambient temperature Tr and judges whether the compressor meets the start-up condition. If so, the compressor is restarted and the air conditioner continues to operate according to the setting. If not, continue to count the operating time t in the temperature-reaching shutdown state; when counting t, the controller judges whether the user has modified the set temperature parameter of the air conditioner. If so, the controller re-reads the current indoor ambient temperature Tr and judges whether the compressor meets the start-up condition based on the temperature parameter newly set by the user. If so, the compressor is restarted and the air conditioner continues to operate according to the new setting and enters step 5. If not, continue to count t;

[0010] Step 5: The controller calculates the rate of change of the indoor ambient temperature ΔT during the temperature-reaching shutdown period, ΔT = |Tr - Trs| / t, clears the statistical time t, and determines whether ΔT is greater than or equal to the preset threshold c. If ΔT ≥ c, the controller adjusts the value of the compressor target operating frequency Ft and the indoor fan operating speed value R, so that Ft = Fs + Fc and the indoor fan speed R = Rs, where Fc can be a value related to Fs or a fixed value;

[0011] If ΔT < c, the controller determines whether ΔT is greater than or equal to a preset threshold value d. If ΔT ≥ d, the controller adjusts the compressor target operating frequency Ft and the indoor fan operating speed R so that Ft = Fs + Fd and the indoor fan speed R = Rs, where Fd can be a value related to Fs or a fixed value.

[0012] If ΔT<d, adjust the value of the compressor target operating frequency Ft and the indoor fan operating speed value R so that Ft=Fs and the indoor fan speed R=Rs.

[0013] Preferably, in step 2:

[0014] In cooling mode, condition 1 is Tr-Ts≤a, where a is the preset threshold;

[0015] In heating mode, condition 1 is Ts-Tr≤a, where a is the preset threshold;

[0016] Preferably, in step 3:

[0017] In cooling mode, condition 2 is Tr-Ts≤b, where b is the preset threshold;

[0018] In heating mode, condition 2 is Ts-Tr≤b, where b is the preset threshold;

[0019] Preferably, in step 4, when judging whether the compressor meets the start-up condition, the condition is that Tr and Ts do not meet condition 1, or Tr and Ts meet condition 1 but do not meet condition 2.

[0020] Preferably, in step 4, when judging whether the user has modified the set temperature parameters of the air conditioner, it is necessary to judge whether the user has increased the set temperature (cooling mode) or decreased the set temperature (heating mode). If the user has increased the set temperature (cooling mode) or decreased the set temperature (heating mode), the controller re-reads the current indoor ambient temperature Tr and adjusts the temperature parameters according to the new setting of the user. If the user has not increased the set temperature (cooling mode) or decreased the set temperature (heating mode), the air conditioner continues to operate under the previous setting.

[0021] Preferably, the controller includes an indoor control mechanism 104 and an outdoor control mechanism 206 that can communicate with each other and control the indoor unit and the outdoor unit respectively.

[0022] An air conditioner is applied to any one of the above methods for controlling the operating frequency of the air conditioner compressor.

[0023] The present invention adopts the above technical solution to provide a method for controlling the operating frequency of an air conditioner compressor, which has the following effects:

[0024] ① When the indoor ambient temperature of the room where the air conditioner is located and the operating temperature set by the user meet condition 1, the air conditioner can adjust the indoor fan speed to the lowest speed.

[0025] ② When the indoor ambient temperature of the room where the air conditioner is located and the operating temperature set by the user meet condition 2, the air conditioner can enter the temperature-reaching shutdown operation control state and the compressor stops running.

[0026] ③ When the air conditioner reaches the temperature shutdown condition, the air conditioner can record the compressor operating frequency and indoor ambient temperature value at that moment.

[0027] ④ When the actual ambient temperature of the indoor space where the air conditioner is located and the operating temperature set by the user meet the compressor start-up conditions, the compressor can be restarted.

[0028] ⑤ After the air conditioner enters the temperature-reaching shutdown operation control state, the air conditioner can detect the rate of change of the indoor ambient temperature.

[0029] ⑥ When the air conditioner restarts cooling or heating operation after ending the temperature shutdown control, the air conditioner can adjust the operating frequency of the air conditioner compressor according to the rate of change of the indoor ambient temperature after the air conditioner enters the temperature shutdown control state.

[0030] Specifically, after the air conditioner stops when the temperature reaches a certain level, the controller detects the rate of change of the indoor ambient temperature and determines the actual indoor heat load. When the compressor starts cooling or heating again, the controller adjusts the compressor to a suitable operating frequency so that the cooling and heating amounts generated by the compressor are close to the actual indoor cooling load and heating load, thereby minimizing subsequent fluctuations in the indoor ambient temperature and improving the thermal comfort of the indoor environment. This avoids the periodic start-up and shutdown of the compressor, which would cause the indoor ambient temperature to fluctuate periodically and affect the thermal comfort of the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the air conditioner involved in the present invention.

[0032] Figure 2 This is a schematic diagram of the control logic for adjusting the operating frequency of the compressor of the air conditioner involved in the present invention. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail, examples of which 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 intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

[0036] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] Example 1:

[0039] like Figures 1-2 The illustrated method for controlling the operating frequency of an air conditioner compressor is applied to an air conditioner, which includes a controller, an indoor unit 10, and an outdoor unit 20. The indoor unit 10 includes an indoor heat exchanger 101, an indoor ambient temperature sensor 102, and an indoor fan 103. The outdoor unit 20 includes a compressor 201, a four-way reversing valve 202, an outdoor heat exchanger 203, an outdoor fan 204, and an outdoor throttling mechanism 205 for controlling flow. The indoor heat exchanger 101 and the outdoor heat exchanger 203 form a loop via a first refrigerant link pipe 30 and a second refrigerant link pipe 40. The compressor 201 and the outdoor throttling mechanism 205 are disposed in the loop. The four-way reversing valve 202 is used to switch a valve port so that the air conditioner has a cooling mode and a heating mode. The control method comprises the following steps:

[0040] Step 1: The air conditioner is turned on, and the cooling or heating mode is turned on. The user inputs the set operating temperature Ts and the set indoor fan operating speed Rs on the controller. The air conditioner receives the set Ts and Rs and operates;

[0041] Step 2: After the air conditioner has been running for a period of time, the controller reads the current indoor ambient temperature Tr collected by the indoor ambient temperature sensor 102. The controller determines whether Tr and Ts meet condition 1, that is, whether Tr is close to the set operating temperature Ts. If so, the controller proceeds to the next step. If not, the controller determines whether the user has modified the set temperature parameters of the air conditioner. If so, the controller returns to step 1. If not, the controller continues to operate according to the set temperature.

[0042] Step 3: The controller determines whether Tr and Ts meet condition 2, that is, whether Tr reaches the set operating temperature Ts. If so, the controller controls the air conditioner to enter the temperature shutdown state and records the current compressor operating frequency Fs and indoor ambient temperature Trs, and the compressor stops running; if not, the controller adjusts the speed of the indoor fan to the minimum speed Rmin;

[0043] Step 4: Count the operating time t in the temperature-reaching shutdown state, and judge whether the time t reaches the preset threshold value α. If T≥α, the controller re-reads the current indoor ambient temperature Tr and judges whether the compressor meets the start-up condition. If so, the compressor is restarted and the air conditioner continues to operate according to the setting. If not, continue to count the operating time t in the temperature-reaching shutdown state; when counting t, the controller judges whether the user has modified the set temperature parameter of the air conditioner. If so, the controller re-reads the current indoor ambient temperature Tr and judges whether the compressor meets the start-up condition based on the temperature parameter newly set by the user. If so, the compressor is restarted and the air conditioner continues to operate according to the new setting and enters step 5. If not, continue to count t;

[0044] Step 5: The controller calculates the rate of change of the indoor ambient temperature ΔT during the temperature-reaching shutdown period, ΔT = |Tr - Trs| / t, clears the statistical time t, and determines whether ΔT is greater than or equal to the preset threshold c. If ΔT ≥ c, the controller adjusts the value of the compressor target operating frequency Ft and the indoor fan operating speed value R, so that Ft = Fs + Fc and the indoor fan speed R = Rs, where Fc can be a value related to Fs or a fixed value;

[0045] If ΔT < c, the controller determines whether ΔT is greater than or equal to a preset threshold value d. If ΔT ≥ d, the controller adjusts the compressor target operating frequency Ft and the indoor fan operating speed R so that Ft = Fs + Fd and the indoor fan speed R = Rs, where Fd can be a value related to Fs or a fixed value.

[0046] If ΔT<d, adjust the value of the compressor target operating frequency Ft and the indoor fan operating speed value R so that Ft=Fs and the indoor fan speed R=Rs.

[0047] Furthermore, in step 2:

[0048] In cooling mode, condition 1 is Tr-Ts≤a, where a is the preset threshold;

[0049] In heating mode, condition 1 is Ts-Tr≤a, where a is the preset threshold;

[0050] Furthermore, in step 3:

[0051] In cooling mode, condition 2 is Tr-Ts≤b, where b is the preset threshold;

[0052] In heating mode, condition 2 is Ts-Tr≤b, where b is the preset threshold;

[0053] Furthermore, in step 4, when judging whether the compressor meets the start-up condition, the condition is that Tr and Ts do not meet condition 1, or Tr and Ts meet condition 1 but do not meet condition 2.

[0054] Furthermore, in step 4, when judging whether the user has modified the set temperature parameters of the air conditioner, it is necessary to judge whether the user has increased the set temperature (cooling mode) or decreased the set temperature (heating mode). If the user has increased the set temperature (cooling mode) or decreased the set temperature (heating mode), the controller re-reads the current indoor ambient temperature Tr and adjusts the temperature parameters based on the new setting of the user. If the user has not increased the set temperature (cooling mode) or decreased the set temperature (heating mode), the air conditioner continues to operate under the previous setting.

[0055] Furthermore, the controller includes an indoor control mechanism 104 and an outdoor control mechanism 206 that can communicate with each other and control the indoor unit 10 and the outdoor unit 20 respectively.

[0056] In this embodiment, the specific control logic steps of the method for controlling the operating frequency of the air conditioner compressor are as follows:

[0057] Step S0: The program starts in step S0 and then proceeds to step S1;

[0058] Step S1: In step S1, the air conditioner receives the set operating temperature Ts and the indoor fan operating speed Rs set by the user, and then enters step S2;

[0059] Step S2: In step S2, the air conditioner operates according to the operating state set by the user, and then enters step S3;

[0060] Step S3: In step S3, the air conditioner operates according to the current state, and then enters step S4;

[0061] Step S4: In step S4, the indoor ambient temperature information Tr collected by the indoor ambient temperature sensor 102 is read, and then the process proceeds to step S5;

[0062] Step S5: In step S5, it is determined whether the air conditioner has received a shutdown signal. If the air conditioner has received a shutdown signal, the process proceeds to step S28; otherwise, the process proceeds to step S6.

[0063] Step S6: In step S6, it is determined whether Tr and Ts meet condition 1. If Tr and Ts meet condition 1, the process proceeds to step S8; otherwise, the process proceeds to step S7.

[0064] In cooling mode, condition 1 is Tr-Ts≤a, where a is a preset threshold, for example, a is preset to 1°C;

[0065] In heating mode, condition 1 is Ts-Tr≤a, where a is a preset threshold, for example, a is preset to 1.5°C;

[0066] Step S7: In step S7, it is determined whether the user has modified the set temperature parameter of the air conditioner. If the user has modified the set temperature parameter, the process proceeds to step S1; otherwise, the process proceeds to step S3.

[0067] Step S8: In step S8, it is determined whether Tr and Ts meet condition 2. If Tr and Ts meet condition 2, the process proceeds to step S10; otherwise, the process proceeds to step S9.

[0068] In cooling mode, condition 2 is Tr-Ts≤b, where b is a preset threshold, for example, b is preset to -1°C;

[0069] In heating mode, condition 2 is Ts-Tr≤b, where b is a preset threshold, for example, b is preset to -1.5°C;

[0070] Step S9: In step S9, the speed of the indoor fan is adjusted to the minimum speed Rmin, and then the process goes to step S7;

[0071] Step S10: In step S10, the current compressor operating frequency Fs and the current indoor ambient temperature Trs are recorded, the unit operates in the temperature-reaching shutdown state, the compressor stops running, and then the process goes to step S11;

[0072] Step S11: In step S11, the operation time t of reaching the temperature shutdown state is counted, and then step S12 is entered;

[0073] Step S12: In step S12, it is determined whether the time t reaches a preset threshold α (for example, α is preset to be 3 minutes). If t ≥ α, the process proceeds to step S13; otherwise, the process returns to step S11.

[0074] Step S13: In step S13, it is determined whether the user has modified the set temperature parameter of the air conditioner. If the user has modified the set temperature parameter, the process proceeds to step S14; otherwise, the process proceeds to step S15;

[0075] Step S14: In step S14, it is determined whether the user of the air conditioner has increased the set temperature (cooling mode) or decreased the set temperature (heating mode). If the user has increased the set temperature (cooling mode) or decreased the set temperature (heating mode), the process proceeds to step S19; otherwise, the process proceeds to step S2.

[0076] Step S15: In step S15, the indoor environment temperature information Tr collected by the indoor environment temperature sensor 102 is read, and then the process proceeds to step S16;

[0077] Step S16: In step S16, it is determined whether the compressor meets the start-up conditions. If the compressor meets the start-up conditions, the process proceeds to step S2; otherwise, the process proceeds to step S17.

[0078] Step S17: In step S17, continue to count the operating time t of the temperature-stop state, and then proceed to step S18;

[0079] Step S18: In step S18, it is determined whether the user has modified the set temperature parameter of the air conditioner. If the user has modified the set temperature parameter, the process proceeds to step S14; otherwise, the process proceeds to step S19;

[0080] Step S19: In step S19, the indoor ambient temperature information Tr collected by the indoor ambient temperature sensor 102 is read, and then the process proceeds to step S20;

[0081] Step S20: In step S20, it is determined whether the compressor meets the start-up conditions. If the compressor meets the start-up conditions, the process proceeds to step S2; otherwise, the process proceeds to step S17.

[0082] Step S21: In step S21, the indoor ambient temperature change rate ΔT during the temperature-reaching shutdown period is calculated, ΔT = |Tr-Trs| / t, the statistical time t is cleared, and then step S22 is entered;

[0083] Step S22: In step S22, it is determined whether the rate of change of the indoor ambient temperature ΔT during the temperature-reaching shutdown period is greater than or equal to a preset threshold value c (for example, c is preset to 0.7°C / min). If ΔT ≥ c, the process proceeds to step S23; otherwise, the process proceeds to step S24.

[0084] Step S23: In step S23, the compressor target operating frequency Ft and the indoor fan operating speed R are adjusted so that Ft = Fs + Fc and the indoor fan speed R = Rs, and then the process proceeds to step S27. Fc can be a value related to Fs (e.g., Fc = 50% × Fs) or a fixed value (e.g., Fc = 30 Hz).

[0085] Step S24: In step S24, it is determined whether the rate of change of the indoor ambient temperature ΔT during the temperature-reaching shutdown period is greater than or equal to a preset threshold value d (e.g., d is preset to 0.4°C / min). If ΔT ≥ d, the process proceeds to step S25; otherwise, the process proceeds to step S26.

[0086] Step S25: In step S25, the compressor target operating frequency Ft and the indoor fan operating speed R are adjusted so that Ft = Fs + Fd and the indoor fan speed R = Rs, and then the process proceeds to step S27. Fd can be a value related to Fs (e.g., Fc = 30% × Fs) or a fixed value (e.g., Fc = 20 Hz).

[0087] Step S26: In step S26, adjust the value of the compressor target operating frequency Ft and the indoor fan operating speed value R so that Ft = Fs and the indoor fan speed R = Rs, and then proceed to step S27;

[0088] Step S27: In step S5, it is determined whether the air conditioner has received a shutdown signal. If the air conditioner has received a shutdown signal, the process proceeds to step S28; otherwise, the process proceeds to step S3.

[0089] Step S28: In step S28, the air conditioner is turned off and the program ends.

[0090] In this specific embodiment, after the air conditioner stops when the temperature reaches a certain level, during the period when the air conditioner is not operating in cooling or heating mode, the actual indoor heat load is measured by calculating the rate of change of the indoor ambient temperature, so that when the air conditioner restarts in cooling or heating mode, a suitable compressor operating frequency is selected to provide the corresponding cooling and heating load input, thereby avoiding periodic and drastic fluctuations in the indoor ambient temperature.

[0091] In addition, it should be noted that when the air conditioner restarts cooling or heating operation after the temperature shutdown control is completed, the compressor operating frequency is related to the compressor operating frequency before the temperature shutdown; during the temperature shutdown control of the air conditioner, the greater the rate of change of the indoor ambient temperature, the higher the compressor operating frequency when the cooling or heating operation is restarted after the temperature shutdown control is completed.

[0092] Example 2:

[0093] like Figure 1An air conditioner shown is applied to the method for controlling the operating frequency of the compressor in the first embodiment.

[0094] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0095] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A method for controlling the operating frequency of an air conditioner compressor, applied to an air conditioner, the air conditioner comprising a controller, an indoor unit (10) and an outdoor unit (20); the indoor unit (10) comprising an indoor heat exchanger (101), an indoor ambient temperature sensor (102) and an indoor fan (103); the outdoor unit (20) comprising a compressor (201), a four-way reversing valve (202), an outdoor heat exchanger (203), an outdoor fan (204) and an outdoor throttling mechanism (205) for controlling flow; the indoor heat exchanger (101) and the outdoor heat exchanger (203) form a loop through a first refrigerant linking pipe (30) and a second refrigerant linking pipe (40); the compressor (201) and the outdoor throttling mechanism (205) are arranged in the above loop, and the four-way reversing valve (202) is used to switch the valve port so that the air conditioner has a cooling mode and a heating mode; the method is characterized in that: The control method comprises the following steps: Step 1: The air conditioner is turned on, and the cooling or heating mode is turned on. The user inputs the set operating temperature Ts and the set indoor fan operating speed Rs on the controller. The air conditioner receives the set Ts and Rs and operates; Step 2: After the air conditioner has been running for a period of time, the controller reads the current indoor ambient temperature Tr collected by the indoor ambient temperature sensor (102), and the controller determines whether Tr and Ts meet condition 1, that is, whether Tr is close to the set operating temperature Ts; In cooling mode, condition 1 is Tr-Ts≤a, where a is a preset threshold; in heating mode, condition 1 is Ts-Tr≤a, where a is a preset threshold; if satisfied, proceed to the next step; if not satisfied, determine whether the user has modified the set temperature parameter of the air conditioner; if so, return to step 1; if not, the air conditioner continues to operate as set; Step 3: The controller determines whether Tr and Ts meet condition 2, that is, whether Tr reaches the set operating temperature Ts; in cooling mode, condition 2 is Tr-Ts≤b, where b is a preset threshold; in heating mode, condition 2 is Ts-Tr≤b, where b is a preset threshold; If the conditions are met, the controller controls the air conditioner to enter the temperature shutdown state and records the current compressor operating frequency Fs and indoor ambient temperature Trs, and the compressor stops running; if not, the controller adjusts the speed of the indoor fan to the minimum speed Rmin; Step 4: Count the operation time t of the temperature-reaching shutdown state, and judge whether the time t reaches the preset threshold value α. If T≥α, the controller re-reads the current indoor ambient temperature Tr, and judges whether the compressor meets the start-up condition. If so, the compressor is restarted and the air conditioner continues to operate according to the setting. If not, continue to count the operation time t of the temperature-reaching shutdown state; when counting t, the controller judges whether the user has modified the set temperature parameter of the air conditioner. If so, the controller re-reads the current indoor ambient temperature Tr and judges whether the compressor meets the start-up condition based on the temperature parameter newly set by the user. If so, the compressor is restarted and the air conditioner continues to operate according to the new setting and enters step 5. If not, continue to count t; when judging whether the compressor meets the start-up condition, the condition is that Tr and Ts do not meet condition 1, or Tr and Ts meet condition 1 but do not meet condition 2; Step 5: The controller calculates the rate of change of the indoor ambient temperature ΔT during the temperature-reaching shutdown period, ΔT = |Tr - Trs| / t, clears the statistical time t, and determines whether ΔT is greater than or equal to the preset threshold c. If ΔT ≥ c, the controller adjusts the value of the compressor target operating frequency Ft and the indoor fan operating speed value R so that Ft = Fs + Fc and the indoor fan speed R = Rs, where Fc can be a value related to Fs or a fixed value; If ΔT < c, the controller determines whether ΔT is greater than or equal to a preset threshold value d. If ΔT ≥ d, the controller adjusts the compressor target operating frequency Ft and the indoor fan operating speed R so that Ft = Fs + Fd and the indoor fan speed R = Rs, where Fd can be a value related to Fs or a fixed value. If △T<d, adjust the value of the compressor target operating frequency Ft and the indoor fan operating speed value R so that Ft=Fs and the indoor fan speed R=Rs.

2. The method for controlling the operating frequency of an air conditioner compressor according to claim 1, wherein: In step 4, when judging whether the user has modified the set temperature parameters of the air conditioner, in cooling mode, it is necessary to judge whether the user has increased the set temperature. If the user has increased the set temperature, the controller re-reads the current indoor ambient temperature Tr and adjusts the temperature parameters according to the new user setting. If the user has not increased the set temperature, the air conditioner continues to operate under the previous setting. In heating mode, it is necessary to judge whether the user has lowered the set temperature. If the user has lowered the set temperature, the controller re-reads the current indoor ambient temperature Tr and adjusts the temperature parameters according to the new user setting. If the user has not lowered the set temperature, the air conditioner continues to operate under the previous setting.

3. The method for controlling the operating frequency of an air conditioner compressor according to claim 1, wherein: The controller comprises an indoor control mechanism (104) and an outdoor control mechanism (206) which are capable of communicating with each other and respectively controlling the indoor unit (10) and the outdoor unit (20).

4. An air conditioner, characterized in that: A method for controlling the operating frequency of an air conditioner compressor as described in any one of claims 1 to 3.

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