Air conditioner

Abstract

The present application discloses an air conditioner (100), comprising: a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3), a temperature sensor (5), a controller (6), and a memory (7). The controller (6) is configured to: when the air conditioner (100) operates for the first time, on the basis of a set temperature and an initial temperature of an indoor environment, select an initial frequency for the compressor (1) from the memory (7), and control the compressor (1) to operate at the selected initial frequency; acquire an operating time of the compressor (1) and a heat exchange amount of the indoor heat exchanger (2) when the temperature of the indoor environment reaches the set temperature; on the basis of the operating time and the heat exchange amount, optimize an operating frequency of the compressor (1) to obtain an optimized frequency of the compressor (1); and when the air conditioner (100) operates again, control the compressor (1) to operate at the optimized frequency. The air conditioner (100) disclosed in the present application enables dynamic energy-saving control and has improved energy-saving performance.

Description

Air conditioner

[0001] The present application claims priority to Chinese Patent Application No. 202411076135.6, filed on August 7, 2024, Chinese Patent Application No. 202411516985.3, filed on October 28, 2024, and Chinese Patent Application No. 202411517783.0, filed on October 28, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. BACKGROUND

[0003] Generally, the air conditioner is controlled for energy saving according to the set temperature which is a relatively specific parameter, without fully considering environmental factors, which leads to an unsatisfactory energy saving effect of the air conditioner and cannot meet the energy saving requirements of users. SUMMARY

[0004] The present application provides an air conditioner, which can dynamically control the air conditioner for energy saving and improve the energy saving control effect.

[0005] According to an aspect of the present application, an air conditioner is provided, comprising:

[0006] An indoor heat exchanger configured to exchange heat with indoor air;

[0007] An outdoor heat exchanger configured to exchange heat with outdoor air;

[0008] A compressor, which forms a refrigerant circulation loop together with the indoor heat exchanger and the outdoor heat exchanger, refrigerant flows in the refrigerant circulation loop, and the compressor is configured to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and drive the refrigerant to flow in the refrigerant circulation loop;

[0009] A temperature sensor configured to detect an indoor environment temperature;

[0010] A memory, which pre-stores a plurality of initial frequencies of the compressor; the initial frequency of the compressor is set corresponding to the set temperature of the air conditioner and the initial temperature of the indoor environment;

[0011] A controller connected with the compressor, the temperature sensor and the memory respectively; the controller is configured to:

[0012] The air conditioner is first operated, the first initial frequency of the compressor is selected from the memory according to the set temperature and the initial temperature of the indoor environment, the compressor is controlled to operate at the selected first initial frequency; the operating time T1 of the compressor and the first heat exchange amount Q1 of the indoor heat exchanger are obtained when the indoor environment temperature reaches the set temperature; the operating frequency of the compressor is optimized according to the operating time T1 of the compressor and the first heat exchange amount Q1 of the indoor heat exchanger, and the optimized frequency of the compressor is obtained.

[0013] The air conditioner is operated again, and the compressor is controlled to operate at the optimized frequency.

[0014] The technical scheme of some embodiments of the present application is that the compressor is operated at the first initial frequency selected according to the initial temperature of the indoor environment and the set temperature when the air conditioner is first operated, then the operating frequency of the compressor is optimized according to the operating time of the compressor and the first heat exchange amount of the indoor heat exchanger when the indoor environment temperature reaches the set temperature when the air conditioner is first operated, the energy-saving frequency of the compressor under the first operating condition of the air conditioner is obtained, and the compressor is operated at the optimized frequency when the air conditioner is operated again, so that the air conditioner can be operated in an energy-saving mode, dynamic energy-saving control of the air conditioner is realized, and the energy-saving control effect of the air conditioner is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a structural schematic diagram of an air conditioner according to some embodiments of the present application;

[0016] FIG. 2 is a flow schematic diagram of refrigerant when the air conditioner is in a cooling mode according to some embodiments of the present application;

[0017] FIG. 3 is a flow schematic diagram of refrigerant when the air conditioner is in a heating mode according to some embodiments of the present application;

[0018] FIG. 4 is a schematic diagram of a controller connected with a compressor, a temperature sensor and a memory according to some embodiments of the present application;

[0019] FIG. 5 is a timing diagram of the operating frequency of the compressor when the air conditioner is in a cooling mode according to some embodiments of the present application;

[0020] FIG. 6 is a schematic diagram of the relationship between the refrigeration capacity and the power per unit time of the compressor when the air conditioner is in a cooling mode according to some embodiments of the present application;

[0021] FIG. 7 is a schematic diagram of the relationship between the refrigeration capacity and the power per unit time of the compressor when the air conditioner is in a heating mode according to some embodiments of the present application;

[0022] FIG. 8 is a work flow diagram when the air conditioner is operated again according to some embodiments of the present application;

[0023] FIG. 9 is a working flowchart of an air conditioner according to some embodiments of the present application;

[0024] FIG. 10 is a mapping relationship diagram between the frequency of a compressor and power, unit heating capacity, and energy efficiency ratio respectively in a heating mode according to some embodiments of the present application;

[0025] FIG. 11 is a flowchart of a control method of an air conditioner according to some embodiments of the present application;

[0026] FIG. 12 is a schematic diagram of the change of the frequency of a compressor with time in the process of cooling the indoor environment temperature to a target temperature according to some embodiments of the present application;

[0027] FIG. 13 is a flowchart of a method of adjusting the frequency of a compressor according to some embodiments of the present application;

[0028] FIG. 14 is a flowchart of a control method of an air conditioner according to some embodiments of the present application;

[0029] FIG. 15 is a structural schematic diagram of an electronic device according to some embodiments of the present application. Embodiments of the present application

[0030] For the purpose of making the purpose and embodiments of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0031] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0032] The terms "first", "second", "third", and the like in the specification and claims of the present application and the above drawings are configured to distinguish similar or similar objects or entities, and do not necessarily mean to limit the specific order or sequence, unless otherwise specified. It should be understood that the terms used in this way can be interchanged under appropriate circumstances.

[0033] The terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to all the components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0034] According to some embodiments of the present application, as shown in FIG. 1, an air conditioner 100 is provided.

[0035] The air conditioner 100 provided by the embodiments of the present application is a variable frequency air conditioner, which can have various implementation forms, for example, can be a wall-mounted air conditioner, a cabinet air conditioner, a ceiling air conditioner, or the like.

[0036] The air conditioner 100 includes a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, an indoor fan 8, and an outdoor fan 9.

[0037] In some embodiments, the indoor heat exchanger 2 is arranged in the indoor environment and is configured to exchange heat with the indoor air, thereby heating or cooling the indoor environment. The outdoor heat exchanger 3 is arranged in the outdoor environment and is configured to exchange heat with the outdoor air.

[0038] The compressor 1, the outdoor heat exchanger 3, and the indoor heat exchanger 2 together form a refrigerant circulation loop; the compressor 1 is configured to compress the low-temperature and low-pressure state refrigerant into a high-temperature and high-pressure state, and to drive the refrigerant to circulate in the refrigerant circulation loop, so that the indoor heat exchanger 2 cools or heats the indoor air. The refrigerant, also known as the refrigerant or snow, is the working medium of the refrigeration cycle. By utilizing the heat absorption and heat release characteristics of the refrigerant in the process of state change, heat transfer is achieved, thereby achieving the purpose of cooling or heating.

[0039] As shown in FIG. 2, when the air conditioner 100 cools the indoor environment, the outdoor heat exchanger 3 works as a condenser, and the indoor heat exchanger 2 works as an evaporator. The refrigerant flows into the outdoor heat exchanger 3 after being compressed by the compressor 1 to release heat, and then flows into the indoor heat exchanger 2 to absorb heat, and finally flows into the compressor 1.

[0040] As shown in FIG. 3, when the air conditioner 100 heats the indoor environment, the outdoor heat exchanger 3 works as an evaporator, and the indoor heat exchanger 2 works as a condenser. The refrigerant flows into the indoor heat exchanger 2 after being compressed by the compressor 1 to release heat, and then flows into the outdoor heat exchanger 3 to absorb heat, and finally flows into the compressor 1.

[0041] In some embodiments, the indoor fan 8 is arranged on one side of the indoor heat exchanger 2, and the outdoor fan 9 is arranged on one side of the outdoor heat exchanger 3.

[0042] Please continue to refer to FIG. 1. In some embodiments, the air conditioner 100 further includes an expansion valve 4, which is arranged in the refrigerant circulation loop. The expansion valve 4 expands the high-temperature and high-pressure state liquid phase refrigerant condensed in the condenser into a low-pressure liquid phase refrigerant.

[0043] The air conditioner 100 performs a refrigeration cycle or a heating cycle of the air conditioner 100 by using the compressor 1, the condenser, the expansion valve 4, and the evaporator. The refrigeration cycle or the heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been adjusted and heat exchanged.

[0044] In some embodiments, as shown in FIG. 4, the air conditioner 100 further comprises a temperature sensor 5 arranged in the indoor environment and configured to detect the indoor ambient temperature.

[0045] In some embodiments, as shown in FIG. 4, the air conditioner 100 further comprises a controller 6 connected to the compressor 1 and configured to control the operation of the compressor 1.

[0046] In some embodiments, the controller 6 is connected to the temperature sensor 5 and configured to receive the detection information of the temperature sensor 5. The controller 6 is configured to control the operation of the compressor 1 according to the detection information of the temperature sensor 5.

[0047] The compressor speed refers to the number of rotations per minute of the output shaft of the compressor 1, which is usually expressed in revolutions per minute (RPM).

[0048] The compressor frequency refers to the number of revolutions per second of the compressor 1, which is usually expressed in hertz (Hz).

[0049] Under certain operating conditions, the cooling capacity or heating capacity of the air conditioner 100 is proportional to the refrigerant mass flow rate. This means that when the refrigerant mass flow rate increases, the cooling capacity also increases accordingly. The refrigerant mass flow rate is proportional to the compressor speed. That is, the faster the compressor 1 rotates, the greater the refrigerant mass flow rate, and thus the greater the cooling capacity. It should be noted that for convenience of description, the cooling capacity or heating capacity is referred to as the heat exchange capacity in some embodiments of the present application.

[0050] In some embodiments of the present application, the operating frequency of the compressor 1 changes constantly during the operation of the air conditioner 100 to achieve energy-saving operation of the air conditioner 100. Taking the air conditioner 100 for cooling as an example, when the indoor temperature is higher than the set temperature, the air conditioner 100 will automatically increase the operating frequency of the compressor 1 to increase the cooling capacity, so that the indoor temperature drops rapidly; when the indoor temperature approaches or reaches the set temperature, the air conditioner 100 will reduce the operating frequency of the compressor 1 to reduce the cooling capacity to maintain the constant indoor temperature.

[0051] As shown in FIG. 5, the room temperature T_indoor is 30℃, the user sets the cooling mode and the set temperature T_set is 26℃, and the controller 6 adjusts the operating frequency of the compressor 1 to gradually reduce the indoor temperature until the indoor environment temperature T_indoor reaches 26℃. During the process of reducing the indoor environment temperature from 30℃ to 26℃, the operating frequency of the compressor 1 is constantly changing, and the operation process of the compressor 1 can be regarded as a combination of a series of frequencies F(i) and corresponding frequency durations Δt(i), that is, the compressor 1 operates at F(0) frequency for Δt(0) duration, then operates at F(1) frequency for Δt(1) duration, and then operates at F(i) frequency for Δt(i) duration, where F(i) is the frequency of the compressor at a certain moment, the unit is Hz; Δt(i) is the corresponding duration of F(i), the unit is s; T1 is the operating time of the compressor 1 when the room temperature T_indoor reaches the set temperature T_set, T1 = Δt(0) + Δt(1) + … + Δt(i).

[0052] Since the operating frequency of the compressor 1 is changing, the operating frequency of the compressor 1 is not a specific value, but a combination of multiple values and times, that is, the operating frequency of the compressor 1 can be regarded as a combination of frequency F(i) and duration Δt(i). Under the condition of constant heat exchange, the operating frequency of the compressor 1 can be a combination of multiple frequencies F(i) and durations Δt(i).

[0053] Generally speaking, the higher the operating frequency of the compressor 1, the greater its power consumption. This is because the increase of frequency will lead to the increase of the motor speed of the compressor 1, thereby increasing the input power of the motor and the mechanical power consumption of the compressor 1. However, with the increase of the operating frequency of the compressor 1, the heat exchange of the air conditioner 100 will also increase accordingly. Therefore, although there are multiple combinations of operating frequencies of the compressor 1 to meet the heat exchange of the air conditioner 100, the power consumption of multiple operating frequency combinations is different.

[0054] As shown in FIG. 6, assuming a room, the time required from the initial temperature to the set temperature is 30min, and the required cooling capacity is ∑Q, ∑Q is the cumulative sum of the unit time (taking 60s) cooling capacity output Q(i) / 60s* corresponding duration Δt(i) of each compressor frequency F(i), that is, the cumulative sum of all operating frequencies between 0-30min corresponding unit cooling capacity output Q(i) / 60s* corresponding duration Δt(i). Wherein, Q(i) / 60s is the unit time output cooling capacity at a certain moment; P(i) is the power at a certain moment.

[0055] As shown in FIG. 6 and FIG. 7, each frequency F(i) corresponds to a power P(i), and the cumulative sum of the power P(i)*Δt(i) is the total power consumption ∑W. Since the unit refrigerating capacity Q(i) / 60s and the power consumption P(i) output by different frequencies F(i) are different, although the compressor 1 can have multiple combinations of frequencies F(i) and durations Δt(i) to make the refrigerating capacity of the indoor heat exchanger 2 ∑Q, the power consumption ∑W of the air conditioner 100 is different in the multiple combinations.

[0056] Under the premise that the required refrigerating capacity ∑Q of the indoor environment is certain, in the multiple combinations of frequencies F(i) and durations Δt(i), the power consumption ∑W of the air conditioner 100 of at least one combination is the lowest. When the power consumption ∑W of the air conditioner 100 is the lowest, the combination of the frequency F(i) and the duration Δt(i) can be considered as the energy-saving frequency of the compressor 1. When the compressor 1 operates at the energy-saving frequency, the air conditioner 100 has a better energy-saving effect.

[0057] It should be noted that in some embodiments of the present application, the energy-saving frequency refers to the operating frequency of the compressor 1 at which the air conditioner 100 has a better energy-saving effect.

[0058] By combining the frequency F(i) and the duration Δt(i) to perform optimization, the operating frequency of the compressor 1 at which the comprehensive power consumption is the lowest can be found, which can improve the energy-saving operation effect of the air conditioner 100 and reduce the power consumption of the air conditioner 100.

[0059] In addition to the temperature factors such as the set temperature of the air conditioner 100 and the initial temperature of the indoor environment affecting the performance of the air conditioner 100, factors such as the actual refrigerating area of the air conditioner 100 and the sealing performance of the working environment of the air conditioner 100 also affect the operation effect and performance of the air conditioner 100. When the heat exchange area of the air conditioner 100 and the sealing performance of the working environment of the air conditioner 100 change, the required heat exchange capacity for the indoor environment to reach the same set temperature is different. When the heat exchange capacity increases, the energy-saving frequency calculated by at least one of the set temperature of the air conditioner 100 and the initial temperature of the indoor environment may increase the operating time of the compressor 1, resulting in an increase in the comprehensive energy consumption of the air conditioner 100. When the heat exchange capacity decreases, the energy-saving frequency calculated by considering the temperature factors may shorten the operating time of the compressor 1, but the power of the compressor 1 during operation is high, which may also result in an increase in the comprehensive energy consumption of the air conditioner 100.

[0060] If the influence of the heat exchange area of the air conditioner 100 actually running, the sealing of the actual working environment and other factors is not considered, the energy-saving frequency of the compressor 1 of the same model air conditioner 100 is the same in the case that the initial temperature of the indoor environment and the set temperature are the same, but the actual refrigeration area of the air conditioner 100, the sealing of the working environment of the air conditioner 100 and other factors will also affect the running effect and performance of the air conditioner 100, so if the influence of the actual refrigeration area of the air conditioner 100, the sealing of the working environment of the air conditioner 100 and other factors is considered, even if the initial temperature of the indoor environment and the set temperature are the same, the energy-saving frequency of the compressor 1 of the same model air conditioner 100 is also different.

[0061] The actual working environment of the air conditioner 100 is unknown when the air conditioner 100 is designed and produced, and it is difficult to design the energy-saving frequency of the compressor 1 considering the heat exchange area of the air conditioner 100 actually running, the sealing of the actual working environment and other factors in the case that the working environment is unknown. In the related art, the influence of at least one of the set temperature of the air conditioner 100 and the initial temperature of the indoor environment is mainly considered when the running frequency of the compressor 1 is optimized and solved, and the influence of the actual refrigeration area of the air conditioner 100, the sealing of the working environment of the air conditioner 100 and other abstract factors is not considered.

[0062] It should be noted that, for the convenience of description, the set temperature of the air conditioner 100 and the initial temperature of the indoor environment and other temperature-related factors are collectively referred to as temperature factors in some embodiments of the present application; and the actual refrigeration area of the air conditioner 100, the sealing of the working environment of the air conditioner 100 and other factors are collectively referred to as abstract factors.

[0063] In some embodiments of the present application, the compressor 1 is caused to run at the energy-saving frequency considering the initial temperature of the indoor environment and the set temperature of the air conditioner and other temperature factors when the air conditioner 100 is first run, so as to ensure that the air conditioner 100 can smoothly, reliably and relatively energy-efficiently complete the refrigeration or heating work, and to obtain relevant information of the actual working environment of the air conditioner 100, so as to optimize and solve the running frequency of the compressor 1 for the specific working environment of the air conditioner 100, and obtain the energy-saving frequency of the compressor 1 considering the working environment and other abstract factors of the air conditioner 100, and the compressor 1 is caused to run at the optimized frequency obtained by the optimization and solution when the air conditioner 100 is run again, thereby increasing the energy-saving effect of the air conditioner 100.

[0064] It should be noted that the initial temperature of the indoor environment and the set temperature of the air conditioner 100 when running are unchanged each time the air conditioner 100 runs, so as to determine the energy-saving running frequency of the compressor 1 in the case that the initial temperature of the indoor environment and the set temperature of the air conditioner 100 when running are the same, thereby causing the air conditioner 100 to run in an energy-saving manner.

[0065] In some embodiments, as shown in FIG. 4, the air conditioner 100 further comprises a memory 7 connected with the controller 6; the memory 7 pre-stores an initial frequency of the compressor 1, which is set corresponding to the set temperature of the air conditioner 100 and the initial temperature of the indoor environment; the initial frequency of the compressor 1 of the air conditioner 100 of the same model is the same.

[0066] It should be noted that the initial frequency stored in the memory 7 is the energy-saving frequency of the compressor 1 obtained by energy-saving design considering the temperature factors such as the initial temperature of the indoor environment and the set temperature of the air conditioner 100. The initial frequency stored in the memory 7 is a parameter related to the initial temperature of the indoor environment and the set temperature, and the initial frequency of the compressor 1 is different when the initial temperature of the indoor environment and the set temperature are different.

[0067] In some embodiments, the initial frequency of the compressor 1 is also related to the running mode of the air conditioner 100, that is, when the initial temperature of the indoor environment and the set temperature are the same, the initial frequency of the compressor 1 may also be different under different running modes of the air conditioner 100.

[0068] In some embodiments, the initial temperature of the indoor environment is s0 when the air conditioner 100 is first run, and the set temperature of the air conditioner 100 is s1 when the air conditioner 100 is run. The control process of the air conditioner 100 is described in detail below. The controller 6 can be configured to perform steps S101 to S105, which are described in detail as follows:

[0069] Step S101, when the air conditioner 100 is first run, the first initial frequency F1 corresponding to the initial temperature s0 of the indoor environment and the set temperature s1 of the air conditioner 100 is selected from the memory 7.

[0070] The first initial frequency F1 is the energy-saving frequency of the compressor 1 of the air conditioner 100 under the working environment of the initial temperature s0 of the indoor environment and the set temperature s1. The first initial frequency F1 does not consider the influence of abstract factors such as the sealing of the working environment and the heat exchange area of the air conditioner 100. The first initial frequency F1 is pre-stored in the memory 7.

[0071] Step S102, control the compressor 1 to run at the first initial frequency F1;

[0072] Step S103, obtain the running time T1 of the compressor 1 and the first heat exchange amount Q1 provided by the indoor heat exchanger 2 when the temperature of the indoor environment reaches the set temperature s1;

[0073] Step S104, optimize the running frequency of the compressor 1 according to the running time T1 of the compressor 1 and the first heat exchange amount Q1 of the indoor heat exchanger 2, and obtain the optimized frequency F2 of the compressor 1;

[0074] Step S105, when the air conditioner 100 is running again, the compressor 1 is controlled to run at the optimized frequency F2.

[0075] The optimized frequency F2 is stored in the memory 7. It should be noted that the optimized frequency F2 is the energy-saving frequency of the compressor 1 considering the temperature factors and the abstract factors of the first running of the air conditioner 100, i.e., the optimized frequency F2 not only considers the initial temperature s0 and the set temperature s1 of the indoor environment and other temperature factors, but also considers the actual heat exchange area and the sealing of the working environment when the air conditioner 100 is running for the first time.

[0076] The actual working environment of the air conditioner 100 after installation is usually relatively fixed, so in some embodiments of the present application, it is assumed that the actual working environment of the air conditioner 100 does not change when the air conditioner 100 is running again, i.e., it is assumed that the heat exchange area and the sealing of the working environment of the air conditioner 100 do not change.

[0077] If the working environment of the air conditioner 100 does not change when the air conditioner 100 is running again, the indoor environment temperature will reach the set temperature s1 after the compressor 1 runs at the optimized frequency F2 for a time T1. It should be noted that the working environment of the air conditioner 100 does not change, and the energy-saving frequency of the compressor 1 also does not change, so there is no need to optimize and solve the running frequency of the compressor 1 again, and the compressor 1 will run at the optimized frequency F2 when the air conditioner 100 runs next time.

[0078] If the actual working environment of the air conditioner 100 changes when the air conditioner 100 is running again (for example, the window is opened when the air conditioner 100 is running again, and the window is not opened when the air conditioner 100 is running for the first time; for another example, the living room and the bedroom are both heated when the air conditioner 100 is running again, and only the living room is heated when the air conditioner 100 is running for the first time), the optimized frequency F2 calculated according to the relevant information when the air conditioner 100 is running for the first time is not the energy-saving frequency of the air conditioner 100 under the current working environment.

[0079] When the air conditioner 100 is running again, the indoor environment temperature does not reach the set temperature s1 after the compressor 1 runs at the optimized frequency F2 for a time T1, which indicates that the required heat exchange amount of the indoor environment when the air conditioner 100 is running again increases.

[0080] When the air conditioner 100 is running again, the indoor environment temperature reaches the set temperature after the compressor 1 runs at the optimized frequency F2 for a time T3, where T3

[0081] When the air conditioner 100 is running again, the controller 6 controls the compressor 1 to run at the optimized frequency F2 for the time T1, and the indoor environment temperature reaches the set temperature s1, which indicates that the heat exchange amount required by the indoor environment when the air conditioner 100 is running again is the same as the heat exchange amount required by the indoor environment when the air conditioner 100 is running for the first time.

[0082] In some embodiments, when the heat exchange amount required by the indoor environment changes when the air conditioner 100 is running again, the running frequency of the compressor 1 under the current working environment of the air conditioner 100 needs to be re-optimized.

[0083] The controller 6 can be configured to: when the heat exchange amount required by the indoor environment changes when the air conditioner 100 is running again, obtain the running time T2 of the compressor 1 and the second heat exchange amount Q2 of the indoor heat exchanger 2 when the indoor environment temperature reaches the set temperature under the current running state of the air conditioner 100; re-optimize the running frequency of the compressor 1 according to the obtained running time T2 of the compressor 1 and the second heat exchange amount Q2 of the indoor heat exchanger 2 to obtain a re-optimized frequency of the compressor 1; and control the compressor 1 to run at the re-optimized frequency when the air conditioner 100 is running next time.

[0084] In some embodiments, the re-optimized frequency can be stored in the memory 7. Illustratively, the storage mode can directly replace the stored running frequency in the memory 7 with the optimized running frequency.

[0085] It should be noted that when the heat exchange amount required by the indoor environment changes when the air conditioner 100 is running again, it is necessary to ensure that the air conditioner 100 can run reliably, and then recalculate the energy-saving frequency under the current working environment of the air conditioner 100 on the premise of ensuring that the air conditioner 100 can run smoothly and reliably.

[0086] In some embodiments, the first heat exchange amount required by the indoor environment when the air conditioner 100 is running for the first time is Q1, and the second heat exchange amount required by the indoor environment when the air conditioner 100 is running again is Q2. After the controller 6 is configured to perform the above steps S101 to S105, the controller 6 is further configured to perform steps S201 to S209, as shown in FIG. 8, and the details are as follows:

[0087] Step S201, determining whether the second heat exchange amount Q2 required by the indoor environment when the air conditioner 100 is running again is greater than the first heat exchange amount Q1 required by the indoor environment when the air conditioner 100 is running for the first time, if yes, performing steps S202 to S206; if no, performing steps S207 to S208.

[0088] Step S202, controlling the compressor 1 to run at the optimized frequency F2 for the time T1.

[0089] Step S203, after the running time T1, the temperature sensor 5 detects the indoor environment temperature at this time, and obtains the indoor environment temperature s0'.

[0090] Step S204, without considering the working environment factors of the air conditioner 100, according to the indoor environment temperature s0' and the set temperature s1 of the air conditioner 100, the second initial frequency of the compressor 1 is selected from the memory 7.

[0091] Step S205, the compressor 1 is controlled to continue running at the second initial frequency until the indoor environment temperature reaches the set temperature s1.

[0092] Step S206, after the indoor environment temperature reaches the set temperature s1, the compressor 1 is controlled to run at a low frequency.

[0093] Step S207, the compressor 1 is controlled to run at the optimized frequency F2 until the indoor environment temperature reaches the set temperature s1.

[0094] Step S208, after the indoor environment temperature reaches the set temperature s1, the compressor 1 is controlled to run at a low frequency.

[0095] It should be noted that the optimized running frequency of the compressor 1 is a set of multiple values arranged in order, that is, the optimized frequency F2 of the compressor 1 = {F(0), F(1), F(2) … F(i)}, wherein F(0), F(1), F(2) … F(i) are arranged in order, and F(0) ≥ F(1) ≥ F(2) ≥ … ≥ F(i). The optimized running frequency F2 of the compressor 1 and the heat exchange amount Q of the indoor heat exchanger 2 satisfy the relationship: F(0)Δt(0)+F(1)Δt(1)+F(2)Δt(2)+F(3)Δt(3)+ … +F(i)Δt(i) = Q / C, wherein C is a coefficient or a certain constant. Before the indoor environment temperature reaches the set temperature s1, the optimized frequency F2 of the compressor 1 gradually decreases in descending order. When the indoor environment temperature reaches the set temperature s1, the compressor 1 runs at a low frequency. The low frequency here refers to a stable frequency that maintains the temperature unchanged after the indoor environment temperature reaches the set temperature s1, and the stable frequency is less than the optimized frequency F2.

[0096] In some embodiments, if Q2 > Q1, within the range of the first heat exchange amount Q1, the controller 6 controls the compressor 1 to run at the optimized frequency F2 for the running time T1; within the range exceeding the first heat exchange amount Q1, the controller 6 controls the compressor 1 to run at the second initial frequency until the indoor environment temperature reaches the set temperature s1, so as to ensure that the air conditioner 100 can work reliably.

[0097] In some embodiments, if Q2> Q1, the controller 6 is configured to record the running time T2 of the compressor 1 and the second heat exchange amount Q2 of the indoor heat exchanger 2 when the indoor environment temperature reaches the set temperature s1, and to optimize the running frequency of the compressor 1 again according to the running time T2 and the second heat exchange amount Q2, to obtain the re-optimized frequency of the compressor 1, wherein T2> T1.

[0098] In some embodiments, if Q2< Q1, the running time T2 of the compressor 1 when the indoor environment temperature reaches the set temperature s1 is shortened compared with the first running time T1 of the air conditioner 100 when the air conditioner 100 is run again, and the running frequency of the compressor 1 is optimized again according to the running time T2 and the second heat exchange amount Q2 when the air conditioner 100 is run for the third time, and then the compressor 1 is controlled to run at the re-optimized frequency, so that the running time of the compressor 1 when the indoor environment temperature reaches the set temperature s1 is the same as the running time T2 of the compressor 1 when the air conditioner 100 is run for the second time when the air conditioner 100 is run for the third time, and overall, the running time of the compressor 1 when the indoor environment temperature reaches the set temperature s1 is shortened compared with the first running time T1 of the air conditioner 100 when the air conditioner 100 is run for the third time, the energy-saving effect of the air conditioner 100 is increased, and the power consumption of the air conditioner 100 is reduced.

[0099] In some embodiments, the optimized result of the running frequency of the compressor 1 is stored in the memory 7 after the optimization is solved, and the compressor 1 is controlled to run at the optimized frequency corresponding to the set temperature stored in the memory 7 when the air conditioner 100 is run again.

[0100] In some embodiments, the controller 6 is configured to store the optimized frequency of the compressor 1 in the memory 7, and to control the compressor 1 to run at the optimized frequency corresponding to the set temperature s1 stored in the memory 7 when the air conditioner 100 is run again.

[0101] In some embodiments, when the optimized frequency corresponding to the set temperature s1 changes, the optimized frequency corresponding to the set temperature s1 is updated in the memory 7 to ensure the reliability of the air conditioner 100 and avoid running errors of the air conditioner 100 caused by too many stored optimized frequencies.

[0102] In some embodiments, the controller 6 is configured to replace the previously stored optimized result with the later stored optimized result when the optimized frequency of the compressor 1 at the same set temperature s1 changes.

[0103] In some embodiments, as shown in FIG. 9, the initial temperature of the indoor environment when the air conditioner 100 is running is s0, and the set temperature when the air conditioner 100 is running is s1. After the controller 6 of the air conditioner 100 is configured to perform the steps S101 to S105 described above, the controller 6 is further configured to perform steps S301 to S306, which are described in detail as follows:

[0104] Step S301, determine whether the time for which the compressor 1 is running at the optimized frequency F2 and whether the temperature of the indoor environment reaches the set temperature s1. If the temperature of the indoor environment reaches the set temperature s1, perform step S302; if the temperature of the indoor environment does not reach the set temperature s1 after the compressor 1 is running for a time T1, perform steps S303 to S306.

[0105] Step S302, after the temperature of the indoor environment reaches the set temperature s1, control the compressor 1 to run at a low frequency.

[0106] Step S303, after the time T1, control the temperature sensor 5 to detect the temperature of the indoor environment at this time to obtain the temperature s0' of the indoor environment.

[0107] Step S304, according to the temperature s0' of the indoor environment and the set temperature s1 of the air conditioner 100, select the second initial frequency of the compressor 1 from the memory 7.

[0108] Step S305, control the compressor 1 to continue running at the second initial frequency for a time T1' until the temperature of the indoor environment reaches the set temperature s1.

[0109] Step S306, after the temperature of the indoor environment reaches the set temperature s1, control the compressor 1 to run at a low frequency.

[0110] In some embodiments, during the time T1' for which the compressor 1 is running at the second initial frequency, the heat exchange amount of the indoor heat exchanger 2 is Q1'. Thus, in this running process of the air conditioner 100, the total time T2 for which the compressor 1 is running when the temperature of the indoor environment reaches the set temperature s1 is T1+T1', and the total heat exchange amount Q2 of the indoor heat exchanger 2 is Q1+Q1'. In this process, the controller 6 is further configured to record the running time T2 of the compressor 1 and the second heat exchange amount Q2 of the indoor heat exchanger 2, and optimize the running frequency of the compressor 1 again according to the running time T2 and the second heat exchange amount Q2 to obtain a re-optimized frequency of the compressor 1. Further, the optimization result stored in the memory 7 can be updated, and the re-optimized frequency is used to replace the optimized frequency stored in the memory 7. When the air conditioner 100 is running next time, the controller 6 controls the compressor 1 to run at the re-optimized frequency stored in the memory 7.

[0111] In some embodiments, during the process that the compressor 1 runs at the optimized frequency F2 for the time T3, the controller 6 is further configured to record the running time T3 of the compressor 1 and the heat exchange amount Q3 of the indoor heat exchanger 2 when the indoor environment temperature reaches the set temperature s1 during this running of the air conditioner 100, wherein T3

[0112] In some embodiments, when the indoor environment temperature reaches the set temperature, the controller 6 controls the compressor 1 to run at a low frequency, so as to maintain the indoor environment temperature at the set temperature s1. This belongs to the related art in the field and will not be described here. When the heat exchange amount required by the indoor environment during the next running of the air conditioner 100 is different from the heat exchange amount required during the first running of the air conditioner 100, the running frequency of the compressor 1 at the low frequency can be solved according to the related calculation method, which will not be described here.

[0113] The following will take the air conditioner 100 to perform refrigeration on the indoor environment, the indoor environment temperature is 30℃, and the set temperature is 26℃ as an example to introduce the control process of the air conditioner 100 in detail.

[0114] After the air conditioner 100 is started for the first time, the controller 6 controls the compressor 1 to run at the initial frequency stored in the memory 7. When the indoor environment temperature reaches 26℃, the running time of the compressor 1 is 30 min, and the total refrigeration amount of the indoor heat exchanger 2 is ∑Q.

[0115] After the air conditioner 100 is started again, the indoor environment temperature is still 30℃, and the set temperature of the air conditioner 100 is still 26℃. According to the running time of 30 min of the compressor 1 and the total refrigeration amount ∑Q of the indoor heat exchanger 2 during the last running of the air conditioner 100, the controller 6 adjusts the combination of F(i) and Δt(i) again, so as to minimize the power consumption ∑W of the compressor 1, and obtains the optimized running frequency of the compressor 1. The air conditioner 100 is run according to the optimized running frequency this time, wherein F(i) decreases in descending order, i.e., F(0)≥F(1)≥F(2)……≥F(i).

[0116] If the indoor environment temperature only drops to 27℃ after the compressor 1 runs for 30 min, the switching from 27℃ to 26℃ is switched to the original traditional algorithm (equivalent to the original algorithm, the first start, the user room temperature T_indoor=27℃, and the user set T_set=26℃), and the total time length becomes ∑t' and the total refrigeration amount becomes ∑Q' after the temperature control running.

[0117] If the indoor environment temperature is reduced to 26℃ after the compressor 1 runs for 25 minutes, the running time ∑t' of the compressor 1 and the refrigerating capacity ∑Q' of the indoor heat exchanger 2 are recorded, and the running frequency of the compressor 1 is calculated by taking ∑Q' and ∑t' as reference values when the air conditioner 100 runs next time.

[0118] After new ∑Q' and ∑t' are obtained each time, they are stored in the memory 7, and ∑Q' and ∑t' can still be saved after the air conditioner 100 is turned off.

[0119] As long as the air conditioner 100 is turned on, the controller 6 can read ∑Q and ∑t obtained when the air conditioner 100 runs last time from the memory 7, and then the controller 6 plans a set of ∑W minimum running modes according to ∑Q and ∑t to run.

[0120] The air conditioner 100 described above can optimize and solve the running frequency of the compressor 1 according to the refrigerating capacity or heating capacity required by the actual working environment of the air conditioner 100, so that the compressor 1 can run at an energy-saving frequency when the air conditioner 100 runs next time under the same working condition, thereby increasing the energy-saving effect of the air conditioner 100; the air conditioner 100 can perform energy-saving control according to the specific working environment of the air conditioner 100, and can also minimize the power consumption of the air conditioner 100 under the premise that the time required for the indoor environment temperature to reach the set temperature s1 is the same, thereby increasing the energy-saving effect of the air conditioner 100.

[0121] The above energy-saving control method mainly counts the total refrigerating capacity required for the air conditioner to reach the temperature for the first time and the temperature reaching time after the air conditioner is turned on, and performs power consumption optimization according to the total refrigerating capacity and the temperature reaching time after the air conditioner is turned on again. However, the above energy-saving control method cannot be applied in the case that the air conditioner 100 is not turned off, the set temperature changes, or the working condition of the air conditioner 100 changes, etc. To solve the related problems, according to another embodiment of the present application, a control method of an air conditioner is provided, which can determine a target power set required for the indoor environment temperature to reach a set temperature for any scene, realize control of the compressor 1 in the most energy-saving manner, and has high universality.

[0122] According to an embodiment of the present application, a control method of an air conditioner 100 is provided, and the execution subject of the method can be a controller 6 of the air conditioner 100.

[0123] The control method of the air conditioner 100 at least includes steps S110 to S140:

[0124] In a case where it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter does not exist in each piece of record information corresponding to the current working mode, total output energy and a temperature-reached duration required for the indoor environmental temperature to reach the current setting temperature are determined according to at least one of the current environmental parameter, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode; each piece of record information includes a setting temperature, an environmental parameter and a corresponding target power set;

[0125] In a case where it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter does not exist in each piece of record information corresponding to the current working mode, total output energy and a temperature-reached duration required for the indoor environmental temperature to reach the current setting temperature are determined according to at least one of the current environmental parameter, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode; each piece of record information includes a setting temperature, an environmental parameter and a corresponding target power set;

[0126] In a case where it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter does not exist in each piece of record information corresponding to the current working mode, total output energy and a temperature-reached duration required for the indoor environmental temperature to reach the current setting temperature are determined according to at least one of the current environmental parameter, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode; each piece of record information includes a setting temperature, an environmental parameter and a corresponding target power set;

[0127] In a case where it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter does not exist in each piece of record information corresponding to the current working mode, total output energy and a temperature-reached duration required for the indoor environmental temperature to reach the current setting temperature are determined according to at least one of the current environmental parameter, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode; each piece of record information includes a setting temperature, an environmental parameter and a corresponding target power set.

[0128] The steps S110 to S140 are described in detail as follows:

[0129] In a case where it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter does not exist in each piece of record information corresponding to the current working mode, total output energy and a temperature-reached duration required for the indoor environmental temperature to reach the current setting temperature are determined according to at least one of the current environmental parameter, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode; each piece of record information includes a setting temperature, an environmental parameter and a corresponding target power set.

[0130] The setting of the temperature by the user of the air conditioner 100 can occur when the air conditioner is started, or can occur in the process of running the air conditioner, which is not limited.

[0131] In some embodiments, the current setting temperature and the working mode of the air conditioner 100 can be obtained based on the setting operation of the user. The current setting temperature is the temperature set by the user for the air conditioner 100. When the air conditioner 100 is started, the indoor environmental temperature will be adjusted according to this current setting temperature to achieve the comfortable environment desired by the user.

[0132] The working mode of the air conditioner 100 includes but is not limited to the cooling mode and the heating mode. The air conditioner 100 will gradually reach the current setting temperature of the indoor environmental temperature through the current working mode, and the current working mode can be the above-mentioned cooling mode or heating mode.

[0133] The current environment parameter of some embodiments of the present application can be at least one of the environment parameters at the current time indoors and outdoors, including but not limited to at least one of the indoor environment temperature, the outdoor environment temperature, the indoor environment humidity, and the outdoor environment humidity at the current time.

[0134] After obtaining the current setting temperature and the current environment parameter, some embodiments of the present application will determine whether there is target record information corresponding to the current setting temperature and the current environment parameter in each record information of the current working mode, each record information including a setting temperature, an environment parameter, and a corresponding target power set, and each record information of a day can be calculated according to the total output energy and the temperature reaching time length required for setting the temperature according to the indoor environment temperature.

[0135] The record information of some embodiments of the present application can be stored in an MCU (Micro controller Unit), an EEPROM (Electrically Erasable Programmable Read-Only Memory), and a cloud, and the like, and is not limited thereto.

[0136] The compressor 1 based on the target power set can minimize the power consumption of the indoor environment temperature reaching the current setting temperature.

[0137] The target power set of some embodiments of the present application contains the power of each running cycle, and the target power set can be represented by {P1, P2, P3, …, Pi, …, Pn}, wherein i represents any one running cycle, Pi represents the power of any one running cycle, n is the number of running cycles, i and n are positive integers greater than 1, and the power of each running cycle can be the same or different.

[0138] In some embodiments, the record information can include record information 1, record information 2, record information 3, and record information 4, each record information including a setting temperature, an environment parameter, and a target power set, and the environment parameter in this example is the indoor environment temperature.

[0139] The setting temperature of the record information 1 is 26℃, the indoor environment temperature is 33℃, and the target power set is {3000w, 4000w, 3000w, …, 2000w};

[0140] The setting temperature of the record information 2 is 26℃, the indoor environment temperature is 35℃, and the target power set is {3000w, 2000w, 3000w, …, 1000w};

[0141] The setting temperature of the record information 3 is 25℃, the indoor environment temperature is 33℃, and the target power group is {4000w, 3000w, 3000w,..., 2000w}.

[0142] The setting temperature of the record information 4 is 24℃, the indoor environment temperature is 34℃, and the target power group is {4000w, 4000w, 3000w,..., 2000w}.

[0143] Suppose that the current working mode is the refrigeration mode, the current setting temperature is 26℃, and the indoor environment temperature is 37℃, it can be determined that the record information 1, the record information 2, the record information 3 and the record information 4 are not the target record information corresponding to the current setting temperature and the current environment parameter.

[0144] Some embodiments of the present application need to generate the target record information, that is, the target power group in the target record information, in the case that it is determined that there is no target record information corresponding to the current setting temperature and the current environment parameter in the recorded multiple record information.

[0145] In some embodiments, the unit output energy and power corresponding to each frequency of the compressor 1 in the current working mode need to be obtained, and the unit output energy refers to the energy output in a unit time, and the unit time can be 60s (or other time length). In actual application, the output energy Q of the compressor 1 in a period of time (such as 60s) can be determined, and then the unit output energy can be represented as Q / 60s.

[0146] The unit output energy of the compressor 1 in the refrigeration mode is the unit refrigeration capacity, and the unit output energy of the compressor 1 in the heating mode is the unit heating capacity.

[0147] The unit output energy and power of each frequency of the compressor 1 in the refrigeration mode or the heating mode can be the experimental data obtained in advance, which can be used as the preset reference value.

[0148] As shown in FIG. 10, a mapping relationship diagram between the frequency of the compressor 1 and the power, the unit heating capacity and the energy efficiency ratio in the heating mode is provided, the horizontal axis represents the frequency (unit: Hz), the left vertical axis represents the power (unit: W) or the unit heating capacity (unit: W), and the right vertical axis represents the energy efficiency ratio. In the heating mode, the energy efficiency ratio = heating capacity / power (in the refrigeration mode, the energy efficiency ratio = refrigeration capacity / power).

[0149] As can be seen from FIG. 10, the correspondence between the frequency and the power indicates that the minimum frequency is about 10 HZ, the greater the frequency, the greater the corresponding power and the greater the corresponding unit heating capacity; the correspondence between the frequency and the energy efficiency ratio indicates that the greater the frequency, the greater the energy efficiency ratio is not necessarily, which provides a reference for determining the optimal power consumption.

[0150] Some embodiments of the present application can determine the total output energy and the temperature reaching time required for the indoor environment temperature to reach the current set temperature according to at least one of the current environmental parameters, the unit output energy and the power corresponding to each frequency of the compressor 1 in the current working mode.

[0151] In some embodiments, the current environmental parameters further include the room volume, which can be an estimated value, and the total output energy required for the indoor environment temperature to reach the current set temperature can be determined according to the temperature difference between the room volume, the current set temperature and the current indoor environment temperature, and the heat load coefficient per unit volume (which is usually obtained through experience or experiment).

[0152] In some embodiments, in a case where it is determined that the temperature difference between the indoor environment temperature and the current set temperature is greater than the target temperature difference, the compressor 1 is controlled to operate according to the first power, the first output energy required for the temperature difference between the indoor environment temperature and the current set temperature to be equal to the target temperature difference can be determined, and the first time length required for the temperature difference between the indoor environment temperature and the current set temperature to be equal to the target temperature difference can be determined according to the first output energy and the unit output energy corresponding to the first power.

[0153] In a case where it is determined that the temperature difference between the indoor environment temperature and the current set temperature is not greater than the target temperature difference, the compressor 1 is controlled to periodically operate according to the second power and the target power difference; the power of the next operating cycle is smaller than the power of the current operating cycle by the target power difference; wherein the second power is smaller than the first power, that is, in a case where it is determined that the temperature difference between the indoor environment temperature and the current set temperature is not greater than the target temperature difference, the power of the compressor 1 is gradually reduced by the target power difference (a pre-set value) as a step, the second output energy can be determined according to the difference between the total output energy and the first output energy, the power of each operating cycle can be determined according to the second power and the target power difference, and the second time length required for the indoor environment temperature to reach the current set temperature can be determined according to the second output energy and the unit output energy corresponding to the power of each cycle.

[0154] The sum of the first time length and the second time length is the temperature reaching time, and in a case where the temperature difference between the indoor environment temperature and the current set temperature is not greater than the target temperature difference, the first time length is non-existent and can be regarded as 0.

[0155] In step S120, at least one candidate power group is determined according to the total output energy and the temperature-reach time length; each candidate power group includes powers corresponding to respective operation periods; and the total time length of the operation periods of each candidate power group is the temperature-reach time length.

[0156] After the temperature-reach time length is determined, the number of operation periods can be determined according to the temperature-reach time length and a period time length in some embodiments of the present application; the period time length refers to the time length of one operation period, and the period time length is usually a preset threshold value, such as 60s. If the temperature-reach time length is 30min, then the number of operation periods is (30x60) / 60=30.

[0157] In some embodiments, the unit output energy of each operation period is unknown, and a plurality of unit output energy groups can be determined according to the total output energy and the number of operation periods when the total output energy and the number of operation periods are known; each unit output energy group includes unit output energies corresponding to respective operation periods. The unit output energies of the operation periods can be the same or different.

[0158] In some embodiments, for each unit output energy group, a frequency group corresponding to the unit output energy group can be obtained according to a first correspondence relationship between the frequency of the compressor 1 and the unit output energy; the frequency group is composed of frequencies that have the first correspondence relationship with each unit output energy in the unit output energy group.

[0159] In some embodiments, for each frequency group, a candidate power group corresponding to the frequency group can be obtained according to a second correspondence relationship between the frequency of the compressor 1 and the power; the candidate power group is composed of powers that have the second correspondence relationship with each frequency in the frequency group.

[0160] In step S130, a target power group is determined from the at least one candidate power group; the power sum value of the target power group is the minimum value among the power sum values of the candidate power groups.

[0161] In some embodiments, after the plurality of candidate groups are obtained, the power sum value of each candidate power group needs to be determined; the power sum value is the sum of the powers in the candidate power group.

[0162] In some embodiments, the candidate power group with the minimum power sum value can be taken as the target power group.

[0163] In step S140, the compressor 1 is controlled to operate according to the target power group.

[0164] After the target power group is obtained, the compressor 1 can be controlled to operate according to the target power group.

[0165] In some embodiments, in each running period, the compressor 1 can be controlled to run based on the power of the running period in the target power set.

[0166] In some embodiments of the present application, in the case that no target record information corresponding to the current setting temperature and the current environmental parameter exists in each record information corresponding to the current working mode, the total output energy and the temperature reaching time required for the indoor environment temperature to reach the current setting temperature are determined according to the current environmental parameter, the unit output energy of each frequency of the compressor 1 corresponding to the current working mode, and the power. Even if the air conditioner 100 is not turned off, even if the current setting temperature changes or the working condition of the air conditioner 100 changes, the total output energy and the temperature reaching time required for the indoor environment temperature to reach the current setting temperature can be determined by the above-mentioned manner, which has high universality.

[0167] In addition, at least one candidate power set is determined according to the total output energy and the temperature reaching time. Each candidate power set includes the power of each running period. The total time length of each running period of each candidate power set is the temperature reaching time. From the at least one candidate power set, a target power set is determined. The power sum of the target power set is the minimum value in the power sum of each candidate power set, that is, the target power set is the optimal frequency combination. The compressor 1 is controlled to run according to the target power set, so as to realize the most energy-saving running of the compressor 1 and effectively reduce the power consumption.

[0168] In some embodiments, the step S120 of determining at least one candidate power set according to the total output energy and the temperature reaching time can include steps S210 to S240:

[0169] The step S210 determines the number of running periods according to the temperature reaching time and the period length.

[0170] The step S220 determines a plurality of unit output energy sets according to the total output energy and the number of running periods. Each unit output energy set includes the unit output energy of each running period.

[0171] The step S230 obtains each frequency group corresponding to each unit output energy group according to a first corresponding relationship between the frequency of the compressor 1 and the unit output energy.

[0172] The step S240 obtains each candidate power set corresponding to each frequency group according to a second corresponding relationship between the frequency of the compressor 1 and the power.

[0173] It can be understood that the product of the unit output energy S(i) corresponding to each operation cycle and the duration T(i) of the operation cycle is the output energy of the operation cycle, and the sum of the output energies of all operation cycles is the total output energy Q, see formula (1): S(0)*T(0)+S(1)*T(1)+…+S(n-1)T(n-1)= Q Formula (1)

[0174] Wherein, S(i) represents the unit output energy of the i th operation cycle, T(i) represents the duration of the i th operation cycle (the duration of each operation cycle can be the same), n represents the number of operation cycles, and Q represents the total output energy.

[0175] Solve all S(0) to S(n-1) in formula (1), denoted as Z(t). In some embodiments, matlab or Python solve can be used to solve, and then converted to C code implementation. These solutions are usually not unique, and there are usually multiple solutions, which can be used as a unit output energy group.

[0176] In some embodiments, after determining the target power group from at least one candidate power group in step S130, the control method of the air conditioner 100 further comprises: generating and storing target record information corresponding to the current set temperature and the current environment parameter in the current working mode.

[0177] In some embodiments, after determining the target power group, target record information containing the current set temperature and the current environment parameter is generated and stored, so that the target power group in the target record information can be directly called when the same current set temperature and current environment parameter are obtained in the working mode subsequently.

[0178] In some embodiments, before determining that there is no target record information corresponding to the current set temperature and the current environment parameter in the record information corresponding to the current working mode in step S110, the control method of the air conditioner 100 further comprises: obtaining the current set temperature, the current working mode and the current environment parameter.

[0179] Some embodiments of the present application can obtain the current set temperature, the current working mode and the current environment parameter after detecting the user's operation of setting the temperature of the air conditioner 100.

[0180] In some embodiments, after obtaining the current set temperature, the current working mode and the current environment parameter, the control method of the air conditioner 100 further comprises: in the case that there is target record information corresponding to the current set temperature and the current environment parameter in the record information corresponding to the current working mode, obtaining the target power group in the target record information; and controlling the compressor 1 to operate according to the target power group.

[0181] Some embodiments of the present application directly obtain the target power group from the target record information in the case that it is determined that the target record information corresponding to the current setting temperature and the current environmental parameter exists in each record information corresponding to the current working mode, and control the compressor 1 to operate according to the target power group, without the need to calculate the target power group again, so that the calculation resources can be effectively saved.

[0182] As shown in FIG. 11, some embodiments of the present application provide a flow chart of a control method of an air conditioner 100, including the following steps S501 to S508:

[0183] Step S501, obtaining the current setting temperature, the current working mode and the current environmental parameter;

[0184] Step S502, judging whether the target record information corresponding to the current setting temperature and the current environmental parameter exists in each record information corresponding to the current working mode; each record information includes the setting temperature, the environmental parameter and the corresponding target power group; if yes, executing step S503; if no, executing step S506;

[0185] Step S503, determining the total output energy and the temperature reaching time required for the indoor environmental temperature to reach the current setting temperature according to the current environmental parameter, the unit output energy of each frequency of the compressor 1 and the power corresponding to the current working mode; executing step S504;

[0186] Step S504, determining at least one candidate power group according to the total output energy and the temperature reaching time; each candidate power group includes the power corresponding to each operation period; the total time length of the operation period of each candidate power group is the temperature reaching time;

[0187] Step S505, determining the target power group from the at least one candidate power group; the power sum value of the target power group is the minimum value in the power sum values of each candidate power group; executing step S507 and step S508;

[0188] Step S506, obtaining the target power group in the target record information;

[0189] Step S507, controlling the compressor 1 to operate according to the target power group;

[0190] Step S508, generating and storing the target record information corresponding to the current setting temperature and the current environmental parameter under the current working mode.

[0191] The detailed implementation process of steps S501 to S508 is described in the foregoing embodiments, which will not be repeated here.

[0192] In some embodiments, after controlling the compressor 1 to operate according to the target power set, the control method of the air conditioner 100 further comprises: first, in the case that the operating time length of the compressor 1 is less than the temperature reaching time length and the indoor environment temperature reaches the current set temperature, taking the operating time length as a new temperature reaching time length and taking the output energy of the compressor 1 as a new total output energy; then, determining a new target power set according to the new temperature reaching time length and the new total output energy; and finally, updating the target power set in the target record information corresponding to the current set temperature and the current environment parameter to the new target power set.

[0193] The foregoing embodiments have explained that, in the case that there is no target record information corresponding to the current set temperature and the current environment parameter in each record information corresponding to the current working mode, the total output energy and the temperature reaching time length required for the indoor environment temperature to reach the current set temperature are determined according to the current environment parameter, the unit output energy and the power of each frequency of the compressor 1 corresponding to the current working mode.

[0194] Then, in the case that there is target record information corresponding to the current set temperature and the current environment parameter in each record information corresponding to the current working mode, the temperature reaching time length can be determined according to the number of powers in the target power set and the time length of the operating period in the target record information, the number of powers in the target power set is the number of operating periods, and the product of the number of operating periods and the operating period is the temperature reaching time length.

[0195] It can be understood that the working condition in the room is variable, such as opening the window, closing the window, increasing the number of people in the room, reducing the number of people in the room, etc. The change of the working condition in the room affects the refrigeration or heating effect in the room. In the case that at least one of the window is closed and the number of people in the room is reduced, the indoor cold or hot air is consumed more slowly, which means that the actual total output energy can be less than the pre-calculated total output energy, and the actual temperature reaching time length can be less than the pre-calculated temperature reaching time length.

[0196] In some embodiments of the present application, the indoor environment temperature is detected and the operating time length of the compressor 1 is counted during the process of controlling the compressor 1 to operate. The operating time length can be started from the time when the compressor 1 starts to execute the target power combination. It is judged whether the operating time length of the compressor 1 is equal to the temperature reaching time length, and whether the indoor environment temperature reaches the current set temperature. In the case that the temperature difference between the indoor environment temperature and the current set temperature is less than a preset temperature difference threshold (such as 0.5℃) and the duration exceeds a target duration (such as 30s), it can be considered that the indoor environment temperature reaches the current set temperature.

[0197] In some embodiments, the operating time length can also be started from the time when the current time temperature is obtained.

[0198] In a case where the running time of the compressor 1 is determined to be less than the reaching time and the indoor environment temperature reaches the current setting temperature, it is indicated that the indoor environment temperature reaches the temperature in advance, and the total output energy is surplus. In this case, the running time can be taken as a new reaching time, and the output energy of the compressor 1 can be taken as a new total output energy. The new target power set can be determined according to the new reaching time and the new total output energy. For details of the determination of the new target power set, refer to steps S120 to S130 described above, which will not be repeated here.

[0199] After obtaining the new target power set in some embodiments of the present application, the target power set in the target record information corresponding to the current setting temperature and the current environment parameter can be updated to the new target power set, so as to obtain a more accurate target power set.

[0200] In some embodiments, after the compressor 1 is controlled to operate according to the target power set, the control method of the air conditioner 100 further includes: in a case where the running time of the compressor 1 is determined to be equal to the reaching time, but the indoor environment temperature does not reach the current setting temperature, controlling the compressor 1 to operate according to a temperature difference between the indoor environment temperature at the end time of the reaching time and the current setting temperature until the indoor environment temperature reaches the current setting temperature; taking the running time of the compressor 1 as a new reaching time and taking the output energy of the compressor 1 as a new total output energy when the indoor environment temperature reaches the current setting temperature; determining a new target power set according to the new reaching time and the new total output energy; and updating the target power set in the target record information corresponding to the current setting temperature and the current environment parameter to the new target power set.

[0201] In a case where at least one of the window is opened and the number of indoor people increases, the dissipation speed of hot air or cold air in the room will be accelerated or increased, which means that the actual total output energy can be greater than the pre-calculated total output energy, and the actual reaching time can be greater than the pre-calculated reaching time.

[0202] In a case where the running time of the compressor 1 is determined to be equal to the reaching time, but the indoor environment temperature does not reach the current setting temperature, it is indicated that the indoor environment temperature reaches the temperature in delay, and the total output energy is insufficient. In this case, to avoid affecting the refrigeration / heating effect, the compressor 1 can be controlled to operate according to a temperature difference between the indoor environment temperature and the current setting temperature until the indoor environment temperature reaches the current setting temperature.

[0203] In some embodiments, the compressor 1 is controlled to operate according to a temperature difference between the indoor environment temperature at the end of the temperature-reaching time length and the current set temperature, including: in a case where it is determined that the temperature difference between the indoor environment temperature at the end of the temperature-reaching time length and the current set temperature is greater than a target temperature difference, the compressor 1 is controlled to operate according to a first power; in a case where it is determined that the temperature difference between the indoor environment temperature at the end of the temperature-reaching time length and the current set temperature is not greater than the target temperature difference, the compressor 1 is controlled to periodically operate according to a second power and a target power difference; the power of a next operation cycle is lower than the power of a current operation cycle, and the difference between the two is the target power difference; wherein the second power is less than the first power.

[0204] In some embodiments, in a case where the running time length is the temperature-reaching time length, but the indoor environment temperature does not reach the target temperature, the temperature difference between the indoor environment temperature and the current set temperature can be determined, and the compressor 1 can be controlled to operate according to the first power in a case where it is determined that the temperature difference between the indoor environment temperature at the end of the temperature-reaching time length and the current set temperature is greater than the target temperature difference, and the compressor 1 can be controlled to periodically operate according to the second power and the target power difference in a case where it is determined that the temperature difference between the indoor environment temperature at the end of the temperature-reaching time length and the current set temperature is not greater than the target temperature difference, until the indoor environment temperature reaches the current set temperature.

[0205] In some embodiments, when the indoor environment temperature reaches the current set temperature, the running time length of the compressor 1 is taken as a new temperature-reaching time length, and the output energy of the compressor 1 is taken as a new total output energy; a new target power group is determined according to the new temperature-reaching time length and the new total output energy; similarly, the target power group in the target record information corresponding to the current set temperature and the current environment parameter needs to be updated to the new target power group, and the detailed process of determining the new target power group is described above in steps S120 to S130, which will not be described here.

[0206] Some embodiments of the present application provide a flowchart of a control method of an air conditioner 100, including the following steps S601 to S606:

[0207] Step S601, the compressor 1 is controlled to operate according to the target power group; if the running time length of the compressor 1 is less than the temperature-reaching time length, and the indoor environment temperature reaches the current set temperature, steps S602, S605 and S606 are executed; if the running time length of the compressor 1 is equal to the temperature-reaching time length, but the indoor environment temperature does not reach the current set temperature, steps S603 to S606 are executed;

[0208] Step S602, in a case where it is determined that the running time length of the compressor 1 is less than the reaching temperature time length and the indoor environment temperature reaches the current setting temperature, the running time length is taken as a new reaching temperature time length, and the output energy of the compressor 1 is taken as a new total output energy;

[0209] Step S603, in a case where it is determined that the running time length of the compressor 1 is equal to the reaching temperature time length, but the indoor environment temperature does not reach the current setting temperature, the compressor 1 is controlled to run according to a temperature difference between the indoor environment temperature at the end time of the reaching temperature time length and the current setting temperature, until the indoor environment temperature reaches the current setting temperature;

[0210] Step S604, in a case where the indoor environment temperature reaches the current setting temperature, the running time length of the compressor 1 is taken as a new reaching temperature time length, and the output energy of the compressor 1 is taken as a new total output energy;

[0211] Step S605, a new target power group is determined according to the new reaching temperature time length and the new total output energy;

[0212] Step S606, the target power group in the target record information corresponding to the current setting temperature and the current environment parameter is updated to the new target power group.

[0213] The detailed implementation process of the above steps S601 to S606 is described in the foregoing embodiments, which will not be repeated here.

[0214] Some embodiments of the present application also provide a control device of an air conditioner 100, which can be configured to execute the control method of the air conditioner 100.

[0215] In the related art, the operation of the air conditioner is controlled with the indoor environment temperature reaching the target temperature set by the user as the priority. In general, after the indoor environment temperature reaches the set target temperature, the compressor of the air conditioner is usually operated at a stable frequency without considering the change of the room load or the adjustment of the set target temperature by the user. This operation mode is relatively power-consuming.

[0216] In order to solve the related problems, according to another embodiment of the present application, a control method and device of an air conditioner 100 are provided, which can achieve the effect of reducing power without changing the output cooling or heating capacity.

[0217] The control method of the air conditioner 100 includes steps S310 to S340, and the execution subject of the method can be the controller 6 of the air conditioner 100, which is described in detail as follows:

[0218] Step S310, in the case that it is determined that the air conditioner 100 is in the temperature reaching state in the current period and the target condition is met, the compressor 1 is controlled to run according to the frequency of the compressor 1 in the current period; after the compressor 1 is controlled to run according to the frequency of the compressor 1 in the current period, step S330 is performed.

[0219] Step S320, the outdoor fan 9 and the indoor fan 8 are respectively controlled to run according to the adjustment sequence of the outdoor fan 9 and the indoor fan 8, and the first rotating speed of the outdoor fan 9 in the current period and the second rotating speed of the indoor fan 8 in the current period; after the outdoor fan 9 and the indoor fan 8 are respectively controlled to run, step S340 is performed.

[0220] Step S330, according to the size relationship between the frequency of the compressor 1 in the current period and the target frequency, the new frequency of the compressor 1 in the next period is determined; the new frequency of the compressor 1 in the next period is less than the frequency in the current period.

[0221] Step S340, according to at least part of the running mode of the air conditioner 100, the indoor environment temperature in the current period, the indoor coil temperature, the outdoor environment temperature, and the outdoor coil temperature, the adjustment sequence of the outdoor fan 9 and the indoor fan 8 in the next period and the corresponding new first rotating speed and new second rotating speed are determined; the new first rotating speed of the outdoor fan 9 in the next period is greater than the first rotating speed of the outdoor fan 9 in the current period; the new second rotating speed of the indoor fan 8 in the next period is greater than the second rotating speed of the indoor fan 8 in the current period.

[0222] Some embodiments of the present application will perform the energy-saving working mode in the case that the air conditioner 100 enters the temperature reaching state and the target condition is met, and the energy-saving working mode can be composed of steps S310 to S340.

[0223] Some embodiments of the present application can collect the indoor environment temperature in real time through the temperature sensor 5 installed on the air conditioner 100, the precision of the indoor environment temperature is 0.1℃, and whether the indoor environment temperature reaches the target temperature set by the user is judged, and the precision of the target temperature is also 0.1℃.

[0224] Suppose that T_indoor represents the indoor environment temperature, T_set represents the target temperature, and the set target temperature difference is 0.5℃, then in the case that |T_indoor-T_set|≤0.5℃ and the duration exceeds the first target duration (for example, 3min), it can be determined that the indoor environment temperature reaches the target temperature, that is, the air conditioner 100 is in the temperature reaching state.

[0225] In the case that |T_indoor-T_set|>0.5℃ and the duration exceeds the second target duration (for example, 10s), it can be determined that the indoor environment does not reach the target temperature, that is, the air conditioner 100 is not in or exits the temperature reaching state.

[0226] The controller 6 of some embodiments of the present application does not perform the above-mentioned energy-saving operation mode when the air conditioner 100 is not in the temperature-reaching state (for example, the air conditioner 100 is just started), but adjusts the operating frequency of the compressor 1 to reduce the room temperature by the method shown in FIG. 12 until the indoor environment temperature reaches the target temperature.

[0227] For example, the indoor environment temperature is 30℃, the target temperature set by the user is 26℃, and the operating mode is the cooling mode. During the process of reducing the indoor environment temperature from 30℃ to 26℃, the operation of the compressor 1 is actually composed of a series of frequencies F(i) and corresponding durations Δt(i) at the frequencies, for example, F(0) frequency for Δt(0) duration, F(1) frequency for Δt(1) duration, F(2) frequency for Δt(2) duration, and F(i) frequency for Δt(i) duration.

[0228] As shown in FIG. 12, some embodiments of the present application provide a schematic diagram of the change of the frequency of the compressor 1 with time during the process of reducing the indoor environment temperature to the target temperature. The vertical axis on the left side of FIG. 12 represents the frequency of the compressor 1, and the frequencies marked on the vertical axis on the left side include 0Hz, 20Hz, 40Hz, 60Hz, 80Hz, 100Hz, and 120Hz. The vertical axis on the right side represents the indoor environment temperature, and the indoor environment temperatures marked on the vertical axis on the right side include 24℃, 25℃, 26℃, 27℃, 28℃, 29℃, and 30℃. The horizontal axis represents time, and the time marked on the horizontal axis includes 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, and 35, with the unit of min.

[0229] As can be seen from FIG. 12, the initial frequency of the compressor 1 is 100Hz. Before the indoor environment temperature reaches the target temperature, the frequency of the compressor 1 is continuously reduced from the overall trend. Each frequency of the compressor 1 has a corresponding duration, and the operation of the compressor 1 is actually composed of a series of frequencies and corresponding durations at the frequencies. The indoor environment temperature is also composed of a series of indoor environment temperatures and corresponding durations at the indoor environment temperatures. After the indoor environment temperature reaches the set target temperature 26℃, the compressor 1 of the air conditioner 100 is subsequently operated at a stable frequency of 20Hz. This operating mode consumes more power.

[0230] To avoid the above-mentioned problems, some embodiments of the present application reduce the frequency of the compressor 1 and increase the rotating speed of the outdoor fan 9 and the indoor fan 8 to save power consumption under the premise of not damaging the refrigeration effect and the heating effect when the indoor environment temperature reaches the target temperature.

[0231] It is worth noting that some embodiments of the present application perform the energy-saving operation mode by not reducing the frequency of the compressor 1 indefinitely and increasing the rotation speed of the outdoor fan 9 and the indoor fan 8, and in the case that the next cycle is not in the temperature-reached state or does not meet the target condition, the above-mentioned energy-saving operation mode will be exited.

[0232] In some embodiments, the target condition includes any one of the following conditions 1, condition 2 and condition 3:

[0233] Condition 1: The first rotation speed difference between the new first rotation speed of the outdoor fan 9 in the next cycle and the first rotation speed of the first cycle does not exceed the first target rotation speed difference.

[0234] Condition 2: The second rotation speed difference between the new second rotation speed of the indoor fan 8 in the next cycle and the second rotation speed of the first cycle does not exceed the second target rotation speed difference.

[0235] Condition 3: The first target rotation speed difference is a preset rotation speed difference threshold, such as 60 rpm, and the second target rotation speed difference is also a preset rotation speed difference threshold, such as 40 rpm.

[0236] The first cycle refers to the first cycle after the air conditioner 100 enters the energy-saving operation mode, and the first cycle can take the time when the temperature-reached state is entered as the starting time. The length of each cycle can be the same, and the length of each cycle can be set according to the refrigeration capacity or heating capacity of the air conditioner 100, such as 40s for an air conditioner 100 with a capacity of 1-1.5 tons, and 60s for an air conditioner 100 with a capacity of 2-3 tons. That is, in the energy-saving operation mode, the frequency of the compressor 1, the first rotation speed of the outdoor fan 9 and the second rotation speed of the indoor fan 8 are adjusted periodically, and it is not appropriate to be too fast or too slow.

[0237] In some embodiments, in the case that the air conditioner 100 is in the temperature-reached state in the next cycle and meets the target condition, the compressor 1 can be controlled to operate according to the new frequency.

[0238] In the case that the indoor environment temperature reaches the target temperature, in order to save power consumption, the frequency of the compressor 1 in the next cycle is reduced, and under the premise of not damaging the refrigeration effect and the heating effect, the rotation speed of the outdoor fan and the rotation speed of the indoor fan need to be increased.

[0239] The adjustment sequence of the indoor fan and the outdoor fan also affects the energy efficiency and operation of the air conditioner 100. A reasonable adjustment sequence can prevent air backflow or other negative effects caused by indoor and outdoor pressure imbalance, and ensure stable operation of the air conditioner 100.

[0240] In some embodiments, the adjustment sequence of the outdoor fan 9 and the indoor fan 8 in the next cycle can be determined according to the operation mode. The operation modes of some embodiments of the air conditioner include a cooling mode and a heating mode.

[0241] The cooling mode circulates refrigerant through the compressor 1, the condenser, the expansion valve 4, and the evaporator. In this mode, the indoor air is cooled by the evaporator and then sent back to the room, thereby reducing the indoor temperature.

[0242] The heating mode uses the reverse cycle principle to transfer heat from the outdoor to the indoor.

[0243] In some embodiments, when it is determined that the operation mode is the cooling mode, it is determined that the adjustment sequence in the next cycle is that the outdoor fan 9 is earlier than the indoor fan 8; when it is determined that the operation mode is the heating mode, it is determined that the adjustment sequence in the next cycle is that the indoor fan 8 is earlier than the outdoor fan 9.

[0244] In some embodiments, the indoor ambient temperature refers to the air temperature measured by the temperature sensor 5 set in the air conditioner 100, which is usually located near the air inlet or air outlet of the indoor unit. This temperature index is configured to monitor the actual temperature in the room in real time, so that the air conditioner 100 can automatically adjust the operation state.

[0245] In some embodiments, the indoor ambient temperature in the current cycle can be the average indoor ambient temperature at each time in the current cycle, or the indoor ambient temperature at the middle or end time of the current cycle, or determined based on the indoor ambient temperature at any time in the current cycle, without limitation.

[0246] In some embodiments, the outdoor ambient temperature is the air temperature measured by an outdoor temperature sensor or meteorological instrument in an open environment.

[0247] In some embodiments, the outdoor ambient temperature in the current cycle can be the average outdoor ambient temperature at each time in the current cycle, or the outdoor ambient temperature at the middle or end time of the current cycle, or determined based on the outdoor ambient temperature at any time in the current cycle, without limitation.

[0248] The indoor coil temperature refers to the temperature measured by the coil surface of the heat exchanger (such as the fan coil) in the indoor environment, which is usually expressed in Celsius (℃) or Fahrenheit (°F).

[0249] In some embodiments, the indoor coil temperature in the current cycle can be the average indoor coil temperature at each time in the current cycle, or the indoor coil temperature at the middle or end time of the current cycle, or determined based on the indoor coil temperature at any time in the current cycle, without limitation.

[0250] The outdoor coil temperature is the temperature measured by the coil surface of a heat exchange device (such as a condenser), usually expressed in degrees Celsius (℃) or degrees Fahrenheit (°F).

[0251] In some embodiments, the outdoor coil temperature of the current period can be the average outdoor coil temperature of each time of the current period, can also be the outdoor coil temperature at the middle time or the end time of the current period, or can even be determined based on the outdoor coil temperature at any time of the current period, and no limitation is made thereto.

[0252] In some embodiments, a first temperature difference between the outdoor ambient temperature and the outdoor coil temperature of the current period, or a second temperature difference between the indoor ambient temperature and the indoor coil temperature can be determined.

[0253] According to at least part of the operation mode, the first temperature difference, and the second temperature difference, a first target speed to be increased of the outdoor fan 9 in the next period and a second target speed to be increased of the indoor fan 8 in the next period are determined;

[0254] In some embodiments, according to the first speed of the outdoor fan 9 in the current period and the first target speed, a new first speed of the outdoor fan 9 corresponding to the next period can be determined; the new first speed of the outdoor fan 9 in the next period is greater than the first speed of the outdoor fan 9 in the current period.

[0255] In some embodiments, according to the first speed of the indoor fan 8 in the current period and the second target speed, a new second speed of the indoor fan 8 corresponding to the next period can be determined; the new second speed of the indoor fan 8 in the next period is greater than the second speed of the indoor fan 8 in the current period.

[0256] In some embodiments, in the case that the air conditioner 100 is in the temperature reaching state in the next period and the target condition is met, according to the adjustment sequence, the new first speed of the outdoor fan 9, and the new second speed of the indoor fan 8, the outdoor fan 9 and the indoor fan 8 are controlled to operate.

[0257] Some embodiments of the present application can appropriately reduce the frequency of the compressor 1 in the next period according to the size relationship between the frequency of the compressor 1 in the current period and the target frequency in the case that the air conditioner 100 is determined to be in the temperature reaching state in the current period and the target condition is met, and appropriately increase the first speed of the outdoor fan 9 in the next period and the second speed of the indoor fan 8 in the next period according to at least part of the operation mode of the air conditioner 100, the indoor ambient temperature, the indoor coil temperature, the outdoor ambient temperature, and the outdoor coil temperature of the current period, so as to achieve the effect of reducing power to reduce power consumption, while keeping the output refrigerating capacity or heating capacity unchanged, and provide better energy-saving effect for users.

[0258] In addition, after the air conditioner 100 exits the energy-saving operation mode due to not being in the temperature-reached state, some embodiments of the present application can readjust the frequency of the compressor 1 to make the air conditioner 100 in the temperature-reached state, and re-execute the aforementioned energy-saving operation mode after the air conditioner 100 is in the temperature-reached state again.

[0259] In some embodiments, after the air conditioner 100 exits the energy-saving operation mode due to the first speed difference between the new first speed of the outdoor fan 9 in the next cycle and the first speed of the first cycle exceeding the first target speed difference, or due to the second speed difference between the new second speed of the indoor fan 8 in the next cycle and the second speed of the first cycle exceeding the second target speed difference, the frequency of the compressor 1, the speed of the indoor fan 8, and the speed of the outdoor fan 9 are restored to the frequency of the compressor 1 in the first cycle when the air conditioner 100 first enters the temperature-reached state, the first speed of the outdoor fan 9 is restored to the first speed of the first cycle when the air conditioner 100 first enters the temperature-reached state, and the second speed of the indoor fan 8 is restored to the second speed of the first cycle when the air conditioner 100 first enters the temperature-reached state, and the aforementioned energy-saving operation mode is re-executed.

[0260] Of course, in some other embodiments, when the energy-saving operation mode is exited due to not satisfying the target condition, the frequency of the compressor 1 can also be adjusted to any frequency in a target frequency interval, the target frequency interval is greater than or equal to the frequency of the last cycle before exiting the energy-saving operation mode, and the target frequency is less than or equal to the frequency of the compressor 1 in the first cycle when the air conditioner 100 first enters the temperature-reached state.

[0261] In some embodiments, when the energy-saving operation mode is exited due to not satisfying the target condition, the first speed of the outdoor fan 9 can also be adjusted to any speed in a first speed interval, the first speed interval is less than or equal to the first speed of the last cycle before exiting the energy-saving operation mode, and the first speed interval is greater than or equal to the first speed of the first cycle when the air conditioner 100 first enters the temperature-reached state.

[0262] In some embodiments, when the energy-saving operation mode is exited due to not satisfying the target condition, the second speed of the indoor fan 8 can also be adjusted to any speed in a second speed interval, the second speed interval is less than or equal to the second speed of the last cycle before exiting the energy-saving operation mode, and the second speed interval is greater than or equal to the second speed of the first cycle when the air conditioner 100 first enters the temperature-reached state.

[0263] In some embodiments, the target step length by which the frequency of the compressor 1 is reduced in the next cycle can be determined according to the size relationship between the frequency of the current cycle and the target frequency. The target frequency includes a first target frequency and a second target frequency; the first target frequency is greater than the second target frequency.

[0264] In some embodiments, the new frequency of the compressor in the next cycle is determined according to the magnitude relationship between the frequency of the compressor 1 in the current cycle and the target frequency, including: first, determining a target step length by which the frequency of the compressor 1 is to be reduced in the next cycle according to the magnitude relationship between the frequency in the current cycle and the target frequency; and then, taking the difference between the frequency in the current cycle and the target step length as the new frequency of the compressor 1 in the next cycle.

[0265] In some embodiments, the target step length is the first target step length when the magnitude relationship is that the frequency in the current cycle is greater than the first target frequency.

[0266] In some embodiments, the target step length is the second target step length when the magnitude relationship is that the frequency in the current cycle is not less than the second target frequency and not greater than the first target frequency; the second target step length is determined according to the ratio of the frequency in the current cycle to a target value; the first target step length is greater than the second target step length; and the target value is a preset constant.

[0267] In some embodiments, the target step length is the third target step length when the magnitude relationship is that the frequency in the current cycle is less than the second target frequency; and the third target step length is less than the second target step length.

[0268] As shown in Table 1, some embodiments of the present application provide a comparison table between the magnitude relationship between the frequency F of the compressor 1 in the current cycle and the target frequency, and the target step length ΔF adjusted in the next cycle, the first target frequency is 50 Hz, and the second target frequency is 10 Hz.

[0269] Table 1

[0270] As can be seen from Table 1, when the magnitude relationship is F>50Hz, the target step length ΔF is the first target step length, and the first target step length is -5.

[0271] When the magnitude relationship is 10≤F≤50, the target step length ΔF is the second target step length; and the second target step length is [-F / 10]; [-F / 10] represents the integer part of the ratio of the frequency in the current cycle to a target value.

[0272] When the magnitude relationship is F<10Hz, the target step length ΔF is the third target step length, and the third target step length is -1.

[0273] As shown in FIG. 13, according to an embodiment of the present application, a flowchart for adjusting the frequency of the compressor 1 is provided, including the following steps S410 to S460:

[0274] Step S410, determining whether the frequency of the compressor 1 in the current cycle is greater than the first target frequency, if yes, executing step S420; if no, executing step S430;

[0275] Step S420, determine the target step length of the frequency of the compressor 1 in the next cycle to decrease as the first target step length; execute step S460;

[0276] Step S430, determine whether the frequency of the compressor 1 in the current cycle is not less than the second target frequency, if yes, execute step S440; if no, execute step S450;

[0277] Step S440, determine the target step length of the frequency of the compressor 1 in the next cycle to decrease as the second target step length; the second target step length is determined according to the ratio of the frequency in the current cycle to the target value; the first target step length is greater than the second target step length; after determining the target step length as the second target step length, execute step S460;

[0278] Step S450, determine the target step length of the frequency of the compressor 1 in the next cycle to decrease as the third target step length; the third target step length is less than the second target step length; after determining the target step length as the third target step length, execute step S460;

[0279] Step S460, take the difference between the frequency in the current cycle and the target step length as the new frequency of the compressor 1 in the next cycle.

[0280] The detailed implementation process of the above steps S410 to S460 can be found in the foregoing embodiments, which will not be repeated here.

[0281] In some embodiments, according to at least part of the operating mode of the air conditioner 100, the indoor environment temperature in the current cycle, the indoor coil temperature, the outdoor environment temperature, and the outdoor coil temperature, the adjustment sequence of the outdoor fan 9 and the indoor fan 8 in the next cycle and the corresponding new first speed and new second speed are determined, including the following steps S1 to S5, which are described as follows:

[0282] Step S1, determine the adjustment sequence of the outdoor fan 9 and the indoor fan 8 in the next cycle according to the operating mode;

[0283] Step S2, determine the first temperature difference between the outdoor environment temperature and the outdoor coil temperature in the current cycle, or the second temperature difference between the indoor environment temperature and the indoor coil temperature;

[0284] Step S3, determine the first target speed to be increased of the outdoor fan 9 in the next cycle and the second target speed to be increased of the indoor fan 8 in the next cycle according to at least part of the operating mode, the first temperature difference, and the second temperature difference;

[0285] Step S4, determine the new first speed of the outdoor fan 9 in the next cycle according to the first speed of the outdoor fan 9 in the current cycle and the first target speed;

[0286] Step S5, determining a new second speed of the indoor fan 8 in the next cycle according to the first speed and the second target speed of the indoor fan 8 in the current cycle.

[0287] The foregoing embodiments have illustrated that the operation mode includes the refrigeration mode and the heating mode, and in the case where it is determined that the operation mode is the refrigeration mode, it is determined that the adjustment sequence in the next cycle is that the outdoor fan 9 is earlier than the indoor fan 8; in the case where it is determined that the operation mode is the heating mode, it is determined that the adjustment sequence in the next cycle is that the indoor fan 8 is earlier than the outdoor fan 9, and this is not limited.

[0288] In some embodiments, a sum of the first speed and the first target speed of the outdoor fan 9 in the current cycle can be taken as the new first speed of the outdoor fan 9 in the next cycle.

[0289] In some embodiments, a sum of the first speed and the second target speed of the indoor fan 8 in the current cycle can be taken as the new second speed of the indoor fan 8 in the next cycle.

[0290] In some embodiments, determining the first target speed to be increased by the outdoor fan in the next cycle and the second target speed to be increased by the indoor fan in the next cycle according to at least part of the operation mode, the first temperature difference and the second temperature difference can include: first, in the case where the operation mode is the refrigeration mode, determining the first target speed to be increased by the outdoor fan 9 in the next cycle according to the first temperature difference; and then, determining the second target speed to be increased by the indoor fan 8 in the next cycle according to the first target speed and the target coefficient.

[0291] In some embodiments, a corresponding relationship between the temperature difference interval and the first target speed can be created, and the temperature difference interval includes a first temperature difference interval, a second temperature difference interval, a third temperature difference interval and a fourth temperature difference interval.

[0292] When the first temperature difference is located in the first temperature difference interval, for example, the first temperature difference interval is (+15℃, +∞), and the first target speed is a first speed threshold, for example, the first speed threshold is +3rpm;

[0293] When the first temperature difference is located in the second temperature difference interval, the maximum value of the second temperature difference interval is less than the minimum value of the first temperature difference interval, for example, the second temperature difference interval is (+10℃, +15℃], and the first target speed is a second speed threshold, the second speed threshold is greater than the first speed threshold, for example, the second speed threshold is +5rpm;

[0294] When the first temperature difference is located in the third temperature difference interval, the maximum value of the third temperature difference interval is less than the minimum value of the second temperature difference interval, for example, the second temperature difference interval is (+5℃, +10℃], and the first target speed is a third speed threshold, the third speed threshold is greater than the second speed threshold, for example, the third speed threshold is +8rpm;

[0295] In a case that the first temperature difference is located in the fourth temperature difference interval, such as the first temperature difference interval is (-∞, +5℃), the first target rotating speed is a fourth rotating speed threshold, and the fourth rotating speed threshold is greater than the third rotating speed threshold, such as the fourth rotating speed threshold is +10 rpm. In some embodiments, determining the first target rotating speed to be increased by the outdoor fan 9 in the next period according to the first temperature difference can include: first, determining the first target temperature difference interval to which the first temperature difference belongs from the temperature difference intervals; and then, taking the target rotating speed corresponding to the first target temperature difference interval as the first target rotating speed to be increased by the outdoor fan 9 in the next period.

[0296] In some embodiments, the first target temperature difference interval to which the first temperature difference belongs can be determined from the temperature difference intervals, and the target rotating speed corresponding to the first target temperature difference interval can be taken as the first target rotating speed to be increased by the outdoor fan 9.

[0297] In some embodiments, determining the second target rotating speed to be increased by the indoor fan according to the first target rotating speed and the target coefficient can include: taking the product of the first target rotating speed and the target coefficient as the second target rotating speed to be increased by the indoor fan 8 in the next period.

[0298] In some embodiments, the target coefficient is a pre-set coefficient threshold, which is calculated according to the indoor and outdoor heat exchange area, and each air conditioner model can be configured separately.

[0299] As shown in Table 2, Table 2 represents the first target rotating speed ΔFan_outdoor of the outdoor fan 9 to be increased in the next period corresponding to the first temperature difference ΔTout between the outdoor environment temperature and the outdoor coil temperature in the cooling mode, and the second target rotating speed ΔFan_indoor of the indoor fan 8 to be increased in the next period determined according to the first target rotating speed ΔFan_outdoor and the target coefficient k.

[0300] Table 2

[0301] In some embodiments, the operating mode can also be the heating mode, and determining the first target rotating speed to be increased by the outdoor fan in the next period and the second target rotating speed to be increased by the indoor fan in the next period according to at least part of the operating mode, the first temperature difference and the second temperature difference can include: first, in a case that the operating mode is the heating mode, determining the second target rotating speed to be increased by the indoor fan 8 in the next period according to the second temperature difference; and then, determining the first target rotating speed to be increased by the outdoor fan 9 in the next period according to the second target rotating speed and the target coefficient.

[0302] In some embodiments, a correspondence between the temperature difference interval and the second target rotating speed can be created, when the second temperature difference is located in the first temperature difference interval, such as the first temperature difference interval being (+15℃, +∞), the second target rotating speed being the first rotating speed threshold, such as the first rotating speed threshold being +3rpm;

[0303] When the second temperature difference is located in the second temperature difference interval, the maximum value of the second temperature difference interval is less than the minimum value of the first temperature difference interval, such as the second temperature difference interval being (+10℃, +15℃], the second target rotating speed being the second rotating speed threshold, the second rotating speed threshold being greater than the first rotating speed threshold, such as the second rotating speed threshold being +5rpm;

[0304] When the second temperature difference is located in the third temperature difference interval, the maximum value of the third temperature difference interval is less than the minimum value of the second temperature difference interval, such as the second temperature difference interval being (+5℃, +10℃], the second target rotating speed being the third rotating speed threshold, the third rotating speed threshold being greater than the second rotating speed threshold, such as the third rotating speed threshold being +8rpm;

[0305] When the second temperature difference is located in the fourth temperature difference interval, such as the first temperature difference interval being (-∞, +5℃), the second target rotating speed being the fourth rotating speed threshold, the fourth rotating speed threshold being greater than the third rotating speed threshold, such as the fourth rotating speed threshold being +10rpm. In some embodiments, determining the second target rotating speed to be increased by the indoor fan 8 in the next cycle according to the second temperature difference can include: first, determining the second target temperature difference interval to which the second temperature difference belongs from the temperature difference intervals; and then, taking the target rotating speed corresponding to the second target temperature difference interval as the second target rotating speed to be increased by the indoor fan 8.

[0306] Some embodiments of the present application can determine the second target temperature difference interval to which the second temperature difference belongs from the temperature difference intervals; the second target temperature difference interval can be any one of the first temperature difference interval, the second temperature difference interval, the third temperature difference interval, and the fourth temperature difference interval, and the target rotating speed corresponding to the second target temperature difference interval is taken as the first target rotating speed to be increased by the indoor fan 8 in the next cycle.

[0307] In some embodiments, determining the first target rotating speed to be increased by the outdoor fan 9 in the next cycle according to the second target rotating speed and the target coefficient includes: taking the ratio of the second target rotating speed and the target coefficient as the first target rotating speed to be increased by the outdoor fan 9 in the next cycle.

[0308] As shown in Table 3, Table 3 represents the second target rotating speed ΔFan_indoor of the indoor fan 8 to be increased in the next cycle corresponding to the second temperature difference ΔTin between the indoor environment temperature and the outdoor coil temperature in the heating mode, and the first target rotating speed ΔFan_outdoor of the outdoor fan 9 to be increased in the next cycle determined according to the second target rotating speed ΔFan_indoor and the target coefficient k.

[0309] Table 3

[0310] According to some embodiments of the present application, a flowchart for determining the new first rotating speed and the new second rotating speed of the outdoor fan 9 and the indoor fan 8 in the next cycle in the cooling mode is provided, including the following steps S510 to S560, which are described in detail as follows:

[0311] Step S510, determining a first temperature difference between the outdoor environment temperature and the outdoor coil temperature in the current cycle;

[0312] Step S520, determining a first target temperature difference interval to which the first temperature difference belongs from each temperature difference interval;

[0313] Step S530, taking the target rotating speed corresponding to the first target temperature difference interval as a first target rotating speed to be increased by the outdoor fan 9 in the next cycle;

[0314] Step S540, taking the product of the first target rotating speed and the target coefficient as a second target rotating speed to be increased by the indoor fan 8 in the next cycle;

[0315] Step S550, determining the new first rotating speed of the outdoor fan 9 in the next cycle according to the first rotating speed of the outdoor fan 9 in the current cycle and the first target rotating speed;

[0316] Step S560, determining the new second rotating speed of the indoor fan 8 in the next cycle according to the first rotating speed of the indoor fan 8 in the current cycle and the second target rotating speed.

[0317] The detailed implementation process of the above steps S510 to S560 is described in the foregoing embodiments, which will not be repeated here.

[0318] According to some embodiments of the present application, a flowchart for determining the new first rotating speed and the new second rotating speed of the outdoor fan 9 and the indoor fan 8 in the next cycle in the heating mode is provided, including the following steps S610 to S660, which are described in detail as follows:

[0319] Step S610, determining a second temperature difference between the indoor environment temperature and the indoor coil temperature;

[0320] Step S620, determining a second target temperature difference interval to which the second temperature difference belongs from each temperature difference interval;

[0321] Step S630, taking the target rotating speed corresponding to the second target temperature difference interval as a second target rotating speed to be increased by the indoor fan 8 in the next cycle;

[0322] Step S640, taking the ratio of the second target rotating speed and the target coefficient as a first target rotating speed to be increased by the outdoor fan 9 in the next cycle;

[0323] Step S650, determining a new first rotating speed of the outdoor fan 9 in the next cycle according to the first rotating speed and the first target rotating speed of the outdoor fan 9 in the current cycle;

[0324] Step S660, determining a new second rotating speed of the indoor fan 8 in the next cycle according to the first rotating speed and the second target rotating speed of the indoor fan 8 in the current cycle.

[0325] The detailed implementation process of the above steps S610 to S660 can refer to the foregoing embodiments, which will not be repeated here.

[0326] In some embodiments, the operating mode is the cooling mode or the heating mode; according to the operating mode, the adjustment sequence of the outdoor fan and the indoor fan in the next cycle is determined, including: in the case of determining that the operating mode is the cooling mode, determining that the adjustment sequence in the next cycle is that the outdoor fan 9 is earlier than the indoor fan 8; in the case of determining that the operating mode is the heating mode, determining that the adjustment sequence in the next cycle is that the indoor fan 8 is earlier than the outdoor fan 9.

[0327] In some embodiments, determining that the air conditioner is in the temperature reaching state includes: in the case that the temperature difference between the indoor environment temperature and the target temperature set by the user is not greater than the target temperature difference, and the duration exceeds the first target duration, it is determined that the air conditioner 100 is in the temperature reaching state; in the case that the temperature difference between the indoor environment temperature T_indoor and the target temperature T_set is not greater than the target temperature difference (such as 0.5℃), which is represented as: |T_indoor-T_set|≤0.5℃, and the duration exceeds the first target duration (such as 3min), it can be determined that the indoor environment temperature reaches the target temperature, that is, it is determined that the air conditioner 100 is in the temperature reaching state.

[0328] In the case that the temperature difference between the indoor environment temperature T_indoor and the target temperature T_set is greater than the target temperature difference, which is represented as |T_indoor-T_set|>0.5℃, and the duration exceeds the second target duration (such as 10s), it can be determined that the indoor environment does not reach the target temperature, that is, it is determined that the air conditioner 100 is not in or exits the temperature reaching state.

[0329] As shown in FIG. 14, according to some embodiments of the present application, a flowchart two of a control method of an air conditioner 100 is provided, including the following steps S810 to S890:

[0330] Step S810, judging whether the air conditioner 100 is in the temperature reaching state in the current cycle; if yes, executing step S820; if no, executing step S880;

[0331] Step S820, judging whether the target condition is met; if yes, executing step S830 and step S840, and the execution order between step S830 and step S840 is not limited; if no, executing step S890;

[0332] Step S830, controlling the compressor 1 to operate according to the frequency of the compressor 1 in the current period; after executing step S830, executing step S850;

[0333] Step S840, controlling the outdoor fan 9 and the indoor fan 8 to operate according to the adjustment order of the outdoor fan 9 and the indoor fan 8, and the first rotating speed of the outdoor fan 9 in the current period and the second rotating speed of the indoor fan 8 in the current period respectively; after executing step S840, executing step S860;

[0334] Step S850, determining the new frequency of the compressor 1 in the next period according to the size relation between the frequency of the compressor 1 in the current period and the target frequency; the new frequency of the compressor 1 in the next period is less than the frequency of the compressor 1 in the current period;

[0335] Step S860, determining the adjustment order of the outdoor fan 9 and the indoor fan 8 and the new first rotating speed and the new second rotating speed corresponding thereto in the next period according to at least part of the operating mode of the air conditioner 100, the indoor environment temperature in the current period, the indoor coil temperature, the outdoor environment temperature and the outdoor coil temperature; the new first rotating speed of the outdoor fan 9 in the next period is greater than the first rotating speed of the outdoor fan 9 in the current period; the new second rotating speed of the indoor fan 8 in the next period is greater than the second rotating speed of the indoor fan 8 in the current period; after executing step S860, executing step S607;

[0336] Step S870, taking the next period as a new current period; after executing step S870, executing step 810;

[0337] Step S880, adjusting the frequency of the compressor 1; the detailed adjustment process can be referred to the above-mentioned related embodiments; after executing step S880, executing step 601;

[0338] Step S890, adjusting the frequency of the compressor 1 to the frequency of the compressor 1 when entering the temperature reaching state for the first time, adjusting the first rotating speed of the outdoor fan 9 to the first rotating speed of the outdoor fan 9 when entering the temperature reaching state for the first time, and adjusting the second rotating speed of the indoor fan 8 to the second rotating speed of the indoor fan 8 when entering the temperature reaching state for the first time; after executing step S890, executing step S830;

[0339] The detailed implementation process of the above-mentioned steps S810 to S890 can be referred to the above-mentioned embodiments, which will not be described here in detail.

[0340] The control method of the air conditioner 100 provided by some embodiments of the present application can be executed by the control device of the air conditioner 100.

[0341] The control device of the air conditioner 100 according to some embodiments of the present application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other device than a terminal. For example, the electronic device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a Mobile Internet Device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The electronic device can also be a server, a Network Attached Storage (NAS), a personal computer (PC), a television (TV), a kiosk, or a self-service machine, etc. Some embodiments of the present application do not make specific limitations.

[0342] The control device 700 of the air conditioner according to some embodiments of the present application can be a device with an operating system. The operating system can be a Windows operating system, an Android operating system, an IOS operating system, or other possible operating systems. Some embodiments of the present application do not make specific limitations.

[0343] The control device of the air conditioner 100 provided by some embodiments of the present application can implement the processes of the above method embodiments. To avoid repetition, the details are not described herein.

[0344] In some embodiments, as shown in FIG. 15, some embodiments of the present application further provide an electronic device 1000, which includes a processor 1001, a memory 1002, and a computer program stored in the memory 1002 and executable on the processor 1001. The program is executed by the processor 1001 to implement the processes of the above control method embodiments of the air conditioner 100 and achieve the same technical effects. To avoid repetition, the details are not described herein.

[0345] It should be noted that the electronic device according to some embodiments of the present application includes a mobile electronic device and a non-mobile electronic device.

[0346] It should be understood that the magnitude of the sequence of processes in the flowchart diagrams described above does not necessarily indicate the sequence in which the processes are performed. Rather, the processes can be performed in any order, and in some instances simultaneously, that permits the applications to reach its desired result. Although the present application has been described in connection with one or more embodiments, it should be understood that the application is capable of further modifications. This application is intended to cover any variations, uses or adaptations of the application including variations of the application that are obvious from the disclosure and fall within the scope of the application.

Claims

1. An air conditioner comprising: an indoor heat exchanger configured to exchange heat with indoor air; an outdoor heat exchanger configured to exchange heat with outdoor air; a compressor, which, together with the indoor heat exchanger and the outdoor heat exchanger, forms a refrigerant circulation loop in which refrigerant flows, the compressor being configured to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and to drive the refrigerant to flow in the refrigerant circulation loop; a temperature sensor configured to detect an indoor ambient temperature; a memory pre-stored with a plurality of initial frequencies of the compressor, the initial frequencies of the compressor being set in correspondence with a set temperature of the air conditioner and an initial temperature of an indoor environment; a controller connected with the compressor, the temperature sensor and the memory respectively, the controller being configured to: select a first initial frequency of the compressor corresponding to the set temperature and the initial temperature of the indoor environment from the memory and control the compressor to operate at the selected first initial frequency when the air conditioner is first operated; obtain a running time T1 of the compressor and a first heat exchange amount Q1 of the indoor heat exchanger when the indoor ambient temperature reaches the set temperature; optimize the running frequency of the compressor according to the running time T1 of the compressor and the first heat exchange amount Q1 of the indoor heat exchanger to obtain an optimized frequency of the compressor; and control the compressor to operate at the optimized frequency when the air conditioner is operated again.

2. The air conditioner of claim 1, wherein, The controller is configured to: when the air conditioner is operated again and the heat exchange amount required by the indoor environment changes, obtain a running time T2 of the compressor and a second heat exchange amount Q2 of the indoor heat exchanger when the indoor ambient temperature reaches the set temperature under the current operating state of the air conditioner; optimize the running frequency of the compressor again according to the obtained running time T2 of the compressor and the second heat exchange amount Q2 of the indoor heat exchanger to obtain a re-optimized frequency of the compressor; and control the compressor to operate at the re-optimized frequency when the air conditioner is operated next time.

3. The air conditioner of claim 1, wherein, The controller is configured to: when the air conditioner is operated again, if the indoor ambient temperature has not reached the set temperature after the compressor operates at the optimized frequency for a running time T1, control the temperature sensor to detect the indoor ambient temperature, select a second initial frequency of the compressor corresponding to the detected indoor ambient temperature and the set temperature from the memory, and control the compressor to continue operating at the re-selected second initial frequency until the indoor ambient temperature reaches the set temperature.

4. The air conditioner of claim 1, wherein, The controller is configured to: when the air conditioner is running again, if the indoor environment temperature reaches the set temperature after the compressor runs for a time T3 at the optimized frequency, and T3 When the air conditioner is running next time, control the compressor to run at the re-optimized frequency.

5. The air conditioner of claim 2, wherein, The controller is configured to: when the air conditioner is running again, if the second heat exchange amount Q2 required by the indoor environment is greater than the first heat exchange amount Q1 required by the indoor environment when the air conditioner is running for the first time, control the compressor to run at the optimized frequency for a time T1 within the range of the first heat exchange amount; Within the range of the first heat exchange amount Q1, control the temperature sensor to detect the indoor environment temperature, and according to the indoor environment temperature detected by the temperature sensor and the set temperature, re-select the second initial frequency of the compressor from the memory, and control the compressor to continue running at the re-selected second initial frequency for a time T', until the indoor environment temperature reaches the set temperature, wherein T2=T1+T'.

6. The air conditioner of claim 2, wherein, The controller is configured to: when the air conditioner is running again, if the second heat exchange amount Q2 required by the indoor environment is less than the first heat exchange amount Q1 required by the indoor environment when the air conditioner is running for the first time, control the compressor to run at the optimized frequency until the indoor environment temperature reaches the set temperature.

7. The air conditioner of claim 6, wherein, The optimized frequency F2 of the compressor is {F(0), F(1), F(2)……≥F(i)}, wherein F(0), F(1), F(2)……F(i) are arranged in order, and F(0)≥F(1)≥F(2)≥……≥F(i).

8. The air conditioner of claim 7, wherein, The controller is configured to: when the indoor environment temperature reaches the set temperature, control the compressor to run continuously at the last frequency value F(i) in the optimized frequency.

9. The air conditioner of claim 1, wherein, The controller is configured to: store the optimized frequency of the compressor in the memory; When the optimized frequency of the compressor changes, the last stored optimization result replaces the previously stored optimization result; when the air conditioner is running next time, control the compressor to run at the optimized frequency stored in the memory. The controller is configured to: store the optimized frequency of the compressor in the memory; When the optimized frequency of the compressor changes, the last stored optimization result replaces the previously stored optimization result; when the air conditioner is running next time, control the compressor to run at the optimized frequency stored in the memory.

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