CN115523627A

CN115523627A - Control method and device of air conditioner, air conditioner and storage medium

Info

Publication number: CN115523627A
Application number: CN202110710484.9A
Authority: CN
Inventors: 袁波
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-12-27

Abstract

The invention discloses a control method and a control device of an air conditioner, the air conditioner and a storage medium, wherein the control method comprises the following steps: acquiring the operating parameters and the operating state of the air conditioner; selecting corresponding oil return conditions according to the operation parameters and the operation state; and acquiring the running frequency of the compressor, and running an oil return mode if the running frequency of the compressor meets the oil return condition. According to the invention, through a mode of closing the indoor fan in the refrigeration oil return mode and directly refluxing the mixture of the refrigerant and the lubricating oil to the compressor, or through a mode of closing the outdoor fan in the heating oil return mode and directly refluxing the mixture of the refrigerant and the lubricating oil to the compressor, the power consumption of the air conditioner can be reduced, the generator can stably output, the damage to the generator is reduced, and the fluctuation of power supply parameters and the damage to other electric appliances can also be reduced. The invention can be widely applied to the technical field of air conditioners.

Description

Control method and device of air conditioner, air conditioner and storage medium

Technical Field

The present application relates to the field of air conditioners, and in particular, to a method and an apparatus for controlling an air conditioner, and a storage medium.

Background

With the development of the technology, the use scenes of the air conditioner are more and more, and for the areas with unstable power systems, the power failure condition often occurs, so that the life quality of users cannot be guaranteed. In order to ensure daily life, the region with unstable power system is usually equipped with small-sized generators. When a user adopts the generator to supply power to various electric appliances at the same time, the output power of the generator is limited, and a plurality of high-power electric appliances (such as an air conditioner, an induction cooker and the like) are operated at the same time, the electric appliances cannot play the maximum role; for the electrical appliance, the current can be increased when the electrical appliance is started and operated under severe working conditions, and the normal use of the generator is not facilitated. In order to protect the generator and other electric appliances, such as air conditioners, which are high-power electric appliances, the related art controls the whole air conditioner power by limiting the frequency of the compressor, so as to ensure the stable operation of the whole generator power supply system. However, with such control method, if the frequency limit of the air conditioner compressor is too low, the compressor operates at a low frequency for a long time, the air conditioner needs oil return, the frequency of the compressor needs to be increased, and then the operating power of the air conditioner is increased, so that the total power used by the whole electric appliance exceeds the rated power of the generator, and the voltage and current fluctuation of the whole system is caused, thereby causing damage to the generator and other operating electric appliances. How to enable the air conditioner to stably operate when a generator supplies power, the stability of the whole power system is ensured, and the technical problem which needs to be solved urgently in the industry is formed.

Disclosure of Invention

The embodiment of the application provides a control method and device of an air conditioner, the air conditioner and a storage medium, and the power generator can stably supply power, fluctuation of power supply parameters is reduced, and damage to the power generator and other electric appliances is reduced.

According to an aspect of an embodiment of the present application, there is provided a control method of an air conditioner, including:

acquiring operation parameters and operation states of the air conditioner, wherein the operation parameters comprise indoor temperature, indoor fan rotating speed, outdoor temperature and outdoor fan rotating speed, and the operation states comprise refrigeration or heating;

selecting corresponding oil return conditions according to the operation parameters and the operation state, wherein the oil return conditions are conditions required to be met by operating an oil return mode;

obtaining the running frequency of a compressor, and running an oil return mode if the running frequency of the compressor meets the oil return condition;

the oil return mode comprises a refrigeration oil return mode and a heating oil return mode; the refrigeration oil return mode is to close the indoor fan in the oil return process so that the mixture of the refrigerant and the lubricating oil flows back to the compressor; the heating oil return mode is to turn off the outdoor fan in the oil return process to enable the mixture of the refrigerant and the lubricating oil to flow back to the compressor.

Optionally, in an embodiment of the present application, before obtaining the operation parameters and the operation state of the air conditioner, the control method further includes:

acquiring the total power of a power supply and the total power of an electric appliance, and if the total power of the power supply is less than the total power of the electric appliance, determining the frequency of the compressor as a limit frequency.

Optionally, in an embodiment of the present application, a connection pipe is disposed between the outdoor heat exchanger of the air conditioner and the compressor, and the refrigerant and the lubricant oil flow back to the compressor through the connection pipe in the oil return mode.

In this application embodiment, acquire compressor operating frequency, if compressor operating frequency accords with the oil return condition, then operation oil return mode specifically includes:

acquiring the running frequency of a compressor;

if the compressor running frequency is lower than a first frequency threshold value contained in the oil return condition, obtaining the duration time of the compressor running frequency which is lower than the first frequency threshold value contained in the oil return condition;

and if the duration is greater than a first preset time threshold included in the oil return condition, operating an oil return mode.

Optionally, in an embodiment of the present application, the operating oil return mode specifically includes:

if the running state of the air conditioner is refrigeration, the indoor fan is closed, the compressor is controlled to run at a preset oil return frequency for a preset oil return time, and the mixture of the refrigerant and the lubricating oil is enabled to flow back to the compressor without passing through an indoor heat exchanger of the air conditioner;

and if the running state of the air conditioner is heating, closing the outdoor fan, controlling the compressor to run at a preset oil return frequency for a preset oil return time, and enabling the mixture of the refrigerant and the lubricating oil to flow back to the compressor without passing through an outdoor heat exchanger of the air conditioner.

Optionally, in an embodiment of the present application, after the compressor operates at the preset oil return frequency for the preset oil return time, the control method further includes:

if the running state of the air conditioner is refrigeration, the oil return mode is closed, the indoor fan is opened, and the mixture of the refrigerant and the lubricating oil is controlled to flow back to the compressor through the indoor heat exchanger;

and if the running state of the air conditioner is heating, closing the oil return mode, opening the outdoor fan, and controlling the mixture of the refrigerant and the lubricating oil to flow back to the compressor through the outdoor heat exchanger.

Optionally, in an embodiment of the present application, the operating the oil return mode includes:

acquiring the current running power of the air conditioner;

and if the current power is less than the power of the air conditioner before the oil return mode is operated, increasing the operation frequency of the compressor until the current power is equal to the power of the air conditioner before the oil return mode is operated.

Optionally, in an embodiment of the present application, the control method further includes:

counting the number of times that the air conditioner operates in the refrigeration oil return mode; if the number of times of the refrigeration oil return mode is greater than a first preset number threshold, after the refrigeration oil return mode is operated, operating the heating oil return mode;

or, counting the number of times that the air conditioner operates the heating oil return mode, and if the number of times of the heating oil return mode is greater than a second preset number threshold, operating the refrigeration oil return mode after the heating oil return mode is finished.

and if the running frequency of the compressor is greater than a second frequency threshold value contained in the oil return condition, and the duration time of the running frequency of the compressor which is greater than the second frequency threshold value contained in the oil return condition is greater than a second preset time threshold value, resetting and recounting the times of the refrigeration oil return mode and the heating oil return mode.

The embodiment of the invention has the beneficial effects that: through the operating parameter and the running state who acquire the air conditioner, according to running parameter and running state select the oil return condition that corresponds, acquire compressor operating frequency, if compressor operating frequency accords with oil return condition, then the operation oil return mode, according to the operating frequency control operation oil return mode of compressor promptly, through close indoor fan in refrigeration oil return mode to and the mode that makes the mixture of refrigerant and lubricating oil directly flow back to the compressor, perhaps through closing outdoor fan in the heating oil return mode, and the mode that makes the mixture of refrigerant and lubricating oil directly flow back to the compressor, can reduce the air conditioner consumption, let the generator can export steadily, reduce the harm to the generator, also can reduce the power supply parameter fluctuation and the harm to other power consumption electrical apparatus.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a hardware configuration of an air conditioner according to the present application;

FIG. 3 is a flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating an embodiment of a control method for an air conditioner according to the present invention;

fig. 5 is a schematic structural view of a control device of an air conditioner according to an embodiment of the present application;

fig. 6 is another schematic structural diagram of a control device of an air conditioner according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

In the related art, when a user uses a generator to simultaneously supply power to a plurality of electric appliances, the output power of the generator is limited, and a plurality of high-power electric appliances are simultaneously operated, for example: air conditioners, induction cookers, and the like, as well as high-power electrical appliances such as air conditioners, cannot play the greatest role; for the air-conditioning type electric appliance, the starting and the severe working condition running of the electric appliance cause the current to increase, which can damage the generator. In order to protect the generator and other electric appliances, the power of the high-power electric appliances such as an air conditioner is usually limited, and for the air conditioner, the whole air conditioner power is generally controlled by the frequency of a compressor so as to ensure the stable operation of the whole generator power supply system. However, with such a control method, if the frequency limit of the air conditioner compressor is too low, the compressor is operated at a low frequency for a long time, the air conditioner needs to return oil, the frequency of the compressor needs to be increased, and then the operating power of the air conditioner is increased, so that the total power used by the whole electric appliance exceeds the rated power of the generator, and the voltage and current of the whole system fluctuate, which causes damage to the generator and other operating electric appliances.

Therefore, the embodiment of the application provides a control method, a control device, an air conditioner and a storage medium of the air conditioner, through obtaining the operating parameters and the operating state of the air conditioner, according to the operating parameters and the operating state, selecting a corresponding oil return condition, obtaining the operating frequency of the compressor, if the operating frequency of the compressor meets the oil return condition, operating the oil return mode, namely, controlling the oil return mode according to the operating frequency of the compressor, and by closing the indoor fan in the refrigeration oil return mode, and enabling the mixture of the refrigerant and the lubricating oil to directly flow back to the compressor, or by closing the outdoor fan in the heating oil return mode, and enabling the mixture of the refrigerant and the lubricating oil to directly flow back to the compressor, the power consumption of the air conditioner can be reduced, the generator can stably supply power and output, the damage to the generator is reduced, and the power supply parameter fluctuation and the damage to other electric appliances can be reduced.

Referring to fig. 1, in the embodiment of the present application, an air conditioner is provided, and includes a compressor 101, a four-way valve 102, an outdoor heat exchanger 103, a shutoff valve 104, a first electronic valve 105, a second electronic valve 106, an outdoor electric controller 107, and an indoor heat exchanger 108. The outdoor heat exchanger 103 is provided in the outdoor unit, and the compressor 101 and the indoor heat exchanger 108 are provided in the indoor unit. The first electronic valve 105 and the second electronic valve 106 may be implemented by electronic expansion valves or the like. It should be noted that, in the embodiment of the present application, only a part of components of the air conditioner are exemplarily given, and the air conditioner may further include other components included in other existing air conditioning equipment to implement corresponding functions, which is not limited specifically. It should be noted that the air conditioner includes, but is not limited to, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, or a ceiling air conditioner.

Alternatively, a connection pipe is provided between the outdoor heat exchanger 103 and the compressor 101, and the refrigerant and the lubricating oil are returned to the compressor 101 through the connection pipe in the oil return mode. For example, the connection pipe may pass through the outdoor electric controller 107, and then return to the compressor after being connected to the return pipe 3.

In the embodiment of the application, the oil return mode may include a refrigeration oil return mode and a heating oil return mode; the refrigeration oil return mode is to close the indoor fan in the oil return process so that the mixture of the refrigerant and the lubricating oil directly flows back to the compressor; the heating oil return mode is that the outdoor fan is closed in the oil return process, so that the mixture of the refrigerant and the lubricating oil directly flows back to the compressor. Taking the structure of fig. 1 as an example, the function of the connection pipe in fig. 1 is to enable the mixture of the refrigerant and the lubricating oil to directly flow back to the compressor 101 without passing through other components when the oil return condition is satisfied, and to reduce the overall size of the circulation system of the mixture of the refrigerant and the lubricating oil and to reduce the operation power of the air conditioner in cooperation with the turning off of the indoor fan or the outdoor fan, thereby providing a larger power conditioning space for the air conditioner. Therefore, even if the compressor of the air conditioner runs at low frequency for a long time to cause the frequency of the compressor to be increased and the running power of the air conditioner to be increased, the total power used by the whole electric appliance cannot easily exceed the rated power of the generator due to the existence of the power regulating space, and the generator can stably supply power.

Referring to fig. 2, fig. 2 is a schematic diagram of a hardware structure of an air conditioner according to embodiments of the present application. In the embodiment of the present application, the mobile air conditioner may include a processor 2001 (e.g., a Central Processing Unit, CPU), a communication bus 2002, an input port 2003, an output port 2004, and a memory 2005. The communication bus 2002 is used for realizing connection communication among the components; the input port 2003 is for data input; the output port 2004 is used for data output, the memory 2005 may be a high-speed RAM memory, or a non-volatile memory (e.g., a magnetic disk memory), and the memory 2005 may optionally be a storage device independent of the processor 2001. Those skilled in the art will appreciate that the hardware configuration shown in fig. 2 is not limiting of the application and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

With continued reference to fig. 2, the memory 2005 as one of the readable storage media in fig. 2 may include an operating system, a network communication module, an application program module, and a control program of the air conditioner. In fig. 2, the network communication module is mainly used for connecting to a server and performing data communication with the server; the processor 2001 may call the control program of the air conditioner stored in the memory 2005 and execute the control method of the air conditioner according to the embodiment of the present application.

Based on the mechanical structure and hardware structure of the air conditioner shown in fig. 1 and fig. 2, as shown in fig. 3, the present embodiment provides a control method of the air conditioner, including but not limited to steps S301, S302, S303, S304 and S305:

s301, obtaining the operation parameters and the operation state of the air conditioner.

It should be noted that the operation parameters in step S301 include an indoor temperature, an indoor fan rotation speed, an outdoor temperature, and an outdoor fan rotation speed, and the operation state includes cooling or heating. The indoor temperature and the outdoor temperature in the operation parameters can be acquired through a temperature sensor and the like arranged on the air conditioner, and the acquired temperature data is transmitted to the processor; the rotating speed of the indoor fan and the rotating speed of the outdoor fan in the operation parameters can be obtained by measuring the rotating speeds of blades of the indoor fan and the outdoor fan of the air conditioner, and the measured rotating speed data is transmitted to the processor.

The operation state refers to the mode of the air conditioner operation, and can include two modes of cooling and heating. The operation state can also comprise common modes of the air conditioner, such as dehumidification, drying, sterilization, purification and the like, and the operation principle of the air conditioner is similar to that of the refrigeration and heating mode. That is to say, the embodiment of the present application may be extended to a control scheme of an air conditioner in two modes, i.e., a cooling mode and a heating mode, and may also be extended to a control scheme of an air conditioner in other modes, i.e., dehumidification, drying, sterilization, purification, etc.

And S302, selecting corresponding oil return conditions according to the operation parameters and the operation state.

In step S302, the oil return condition is a condition that needs to be satisfied for operating the oil return mode. It can be understood that different oil return conditions can be preset or preconfigured according to different actual needs. Optionally, the oil return condition is related to parameters such as the rotating speed of the indoor fan and the rotating speed of the outdoor fan, the indoor temperature and the outdoor temperature, and the like, and can also be related to the running state of the air conditioner. That is to say, different oil return conditions can be comprehensively selected according to different parameters such as the rotating speed of the indoor fan, the rotating speed of the outdoor fan, the indoor temperature and the outdoor temperature and the like and by combining different running states of the air conditioner.

In the embodiment of the application, the oil return condition can be represented or described by parameters such as the limiting oil return frequency and the continuous operation time of the compressor.

For example, in the case where the air conditioner operation state is cooling, the corresponding oil return condition may be determined according to the following table 1:

TABLE 1 oil return conditions for different outdoor temperatures and indoor rotation speeds of air conditioner in cooling mode

As shown in table 1 above, when the outdoor temperature is less than or equal to 30 ℃ and the outdoor fan speed is less than or equal to 400rpm/min, the oil return condition includes a first frequency threshold (i.e., the limit oil return frequency) F _{Oil return} 30Hz, the oil return condition comprises a first preset time threshold (namely the continuous operation time) t _{Oil return} And 30min, namely, when the compressor running frequency of the air conditioner is lower than the first frequency threshold value by 30Hz and lasts for 30min, the air conditioner starts to run the oil return mode. Similarly, when the outdoor temperature is between 30 ℃ and 40 ℃ and the rotating speed of the outdoor fan is more than or equal to 600rpm/min, the oil return condition comprises a first frequency threshold value F _{Oil return} Is 25Hz, and the oil return condition comprises a first preset time threshold value t _{Oil return} Is 40 minutes, i.e., after the compressor operation frequency of the air conditioner is lower than the first frequency threshold value of 25Hz for 40 minutes, the air conditioner starts to operate the oil return mode. Similarly, when the outdoor temperature is more than or equal to 40 ℃ and the outdoor fan rotating speed is between 400rpm/min and 600rpm/min, the oil return condition comprises a first frequency threshold value F _{Oil return} Is 20Hz, and the oil return condition comprises a first preset time threshold value t _{Oil return} Is 35 minutes, i.e., after the compressor operation frequency of the air conditioner is lower than the first frequency threshold value by 20Hz for 35 minutes, the air conditioner starts to operate the oil return mode. Therefore, the oil return condition, i.e. the first frequency threshold and the first preset time threshold, will change to the corresponding preset values according to the difference between the indoor and outdoor fan rotation speed and the indoor and outdoor temperature. The oil return conditions of different outdoor temperatures and outdoor fan rotation speeds when the air conditioner is in the cooling working state are given in table 1, and correspondingly, the oil return conditions of different indoor temperatures and indoor fan rotation speeds when the air conditioner is in the cooling working state, the oil return conditions of different outdoor temperatures and outdoor fan rotation speeds when the air conditioner is in the heating working state, and the oil return strips of different indoor temperatures and indoor fan rotation speeds when the air conditioner is in the heating working stateElements are similar to those in table 1 and are not described in detail herein.

And S303, acquiring the running frequency of the compressor.

As can be understood from the foregoing description, the operating frequency of the compressor (including the operating frequency when the oil return condition is included) is limited so as not to exceed the rated power of the generator, and therefore, in order to facilitate the subsequent determination of whether the oil return condition is met, the operating frequency of the compressor needs to be obtained first. The method and the device for acquiring the running frequency of the air conditioner do not specifically limit the mode for acquiring the running frequency of the compressor, and can acquire the running frequency of the air conditioner through the modes of multimeter measurement, reading of the frequency detection equipment of the air conditioner and the like.

And S304, judging that the running frequency of the compressor meets the oil return condition.

From the foregoing description or a priori knowledge, it can be seen that the need for oil return is related to the operating frequency of the compressor and also to the time that the compressor is operating continuously at a lower frequency. Therefore, step 304 can be further subdivided into the following steps S3041, S3042 and S3043:

s3041, determining whether the operating frequency of the compressor is lower than a first frequency threshold included in the oil return condition.

The first frequency threshold is used for representing whether the current operating frequency of the compressor meets the frequency requirement required by the oil return mode or not. The specific value of the first frequency threshold may be selected according to actual needs, and this is not specifically limited in this embodiment of the application.

S3042, if the operating frequency of the compressor is lower than the first frequency threshold included in the oil return condition, obtaining a duration that the operating frequency of the compressor is lower than the first frequency threshold included in the oil return condition.

According to the foregoing description, in addition to the requirement that the operating frequency of the compressor is lower than the first frequency threshold, whether to operate the oil return mode or not needs to determine whether the duration of the operation of the compressor at the frequency lower than the first frequency threshold reaches the preset duration (i.e. the first preset time threshold), so step S3042 needs to acquire the duration of the operation frequency of the compressor lower than the first frequency threshold included in the oil return condition.

S3043, determining whether the duration is greater than a first preset time threshold included in the oil return condition.

In step S3043 of this embodiment of the present application, the first preset time threshold is used to measure or represent whether the duration of the compressor operating at the frequency lower than the first frequency threshold meets the requirement of time. It can be understood that the specific value of the first preset time threshold may be selected according to actual needs, and this is not specifically limited in this embodiment of the application.

It is understood by those skilled in the art that steps S3041-S3043 are only an example of a specific implementation manner for determining that the operation frequency of the compressor meets the oil return condition, and do not limit the present invention, and other implementation manners may also be adopted, for example, the current operation frequency of the compressor and the duration of the continuous operation at the current operation frequency are obtained in parallel, and then it is determined whether the current operation frequency and the duration meet the frequency requirement and the continuous operation time requirement of the oil return mode at the same time.

And S305, if the duration time is greater than a first preset time threshold included in the oil return condition, operating an oil return mode.

In step S305, after it is determined in step S304 that the operation frequency of the compressor meets the oil return condition, the corresponding oil return mode may be operated.

According to the embodiment of the application, the oil return condition needs to be selected before the air conditioner runs in the oil return mode, the processor can take the running state of the air conditioner as one of selection bases before the oil return condition is selected, namely the refrigerating oil return mode is selected when the air conditioner is in the refrigerating running state, and the heating oil return mode is selected when the air conditioner is in the heating running state. The reason is that when the operation states of the air conditioner are different, the flow directions of the internal coolant and the lubricating oil are different, and the working states of related parts are also different, so that corresponding oil return modes need to be selected respectively according to different operation states, and faults of the air conditioner caused by selected mode errors in the operation process are prevented.

Therefore, in step S305, the oil return mode includes a cooling oil return mode and a heating oil return mode; the refrigeration oil return mode is that the indoor fan is closed in the oil return process, so that the mixture of the refrigerant and the lubricating oil directly flows back to the compressor; the heating oil return mode is to turn off the outdoor fan in the oil return process, so that the mixture of the refrigerant and the lubricating oil directly flows back to the compressor. That is, the cooling oil return mode is an oil return mode operable when the air conditioner is in the cooling state, and the heating oil return mode is an oil return mode operable when the air conditioner is in the heating state.

It should be noted that the operation of the oil return mode in the step S305 specifically includes:

if the running state of the air conditioner is refrigeration, closing the indoor fan, controlling the compressor to run at a preset oil return frequency for a preset oil return time, and enabling the mixture of the refrigerant and the lubricating oil to flow back to the compressor without passing through the indoor heat exchanger;

if the running state of the air conditioner is heating, the outdoor fan is turned off, the compressor is controlled to run at the preset oil return frequency for the preset oil return time, and the mixture of the refrigerant and the lubricating oil does not flow back to the compressor through the outdoor heat exchanger.

In the embodiment of the present application, the oil return mode is an operation mode in which oil is returned while the frequency of the compressor is reduced. It should be noted that, during the operation of the air conditioner, the lubricant oil of the compressor is discharged out of the compressor along with the refrigerant and enters the condenser, the piping, the evaporator, etc. of the air conditioner, and the discharged lubricant oil needs to be smoothly brought back to the compressor to maintain the dynamic balance of the whole system oil, otherwise, the compressor is damaged due to oil shortage. The process from the discharge of the mixture of lubricating oil and coolant to the return of the mixture to the compressor is the oil return process of the embodiment of the present application. Oil return is an important process for maintaining the normal operation of the compressor during the operation of the air conditioner, and if operated without lubricating oil, the compressor may be burned out due to wear and overheating.

The cooling oil return mode and the heating oil return mode in step S305 may be implemented in combination with the connection pipes and the on-off control of the stop valve 104, the first electronic valve 105, and the second electronic valve 106 shown in fig. 1. Specifically, when the air conditioner is in a normal operation state, the indoor fan and the outdoor fan operate simultaneously, and when the air conditioner operates in the oil return mode, the operation conditions of the indoor fan and the outdoor fan can be changed according to the operation state of the air conditioner. When the running state of the air conditioner is a refrigerating state, the indoor fan is closed after the air conditioner enters an oil return state, and the outdoor fan is kept in a normal running state; meanwhile, the stop valve 104 and the first electronic valve 105 in fig. 1 are controlled to be opened, and the second electronic valve 106 is controlled to be closed, so that the mixture of the refrigerant and the lubricating oil flows back to the compressor without passing through the indoor heat exchanger 108, that is, the mixture of the refrigerant and the lubricating oil flows from the outdoor heat exchanger 103 to the compressor 101 directly through a connecting pipe between the outdoor heat exchanger 103 and the compressor 101 (through the outdoor electric controller 107) without passing through the indoor heat exchanger 108, thereby reducing the overall size of a circulating system through which the mixture of the refrigerant and the lubricating oil passes, and reducing the power of the air conditioner under the condition of oil return. When the air conditioner is in a heating state, the outdoor fan is turned off after the air conditioner enters an oil return state, the indoor fan is kept in a normal operation state, meanwhile, the stop valve 104 and the second electronic valve 106 in fig. 1 are controlled to be closed, the first electronic valve 105 is controlled to be opened, and a mixture of the refrigerant and the lubricating oil flows back to the compressor, namely, the mixture of the refrigerant and the lubricating oil directly flows to the compressor 101 through a connecting pipe between the first electronic valve 105 and the compressor 101 (through the outdoor electric controller 107) without passing through the outdoor heat exchanger 103, so that the overall size of a circulating system through which the mixture of the refrigerant and the lubricating oil passes is reduced, and the power of the air conditioner under the condition of oil return is reduced. Through the two oil return modes, one of the indoor fan or the outdoor fan is turned off, the whole power of the air conditioner is reduced, meanwhile, oil can be returned normally, the power of the air conditioner can be reduced under the condition of oil return of the air conditioner, the generator can keep stable output, damage to the generator is reduced, and power supply parameter fluctuation and damage to other electric appliances can be reduced.

It can be understood that during the cooling oil return mode of operation, the mixture of refrigerant and lubricant oil does not pass through the indoor heat exchanger, but directly flows back to the compressor through the connection pipe between the outdoor heat exchanger 103 and the compressor 101, so that in order to further reduce the overall operation power of the air conditioner, the indoor heat exchanger can be closed during the oil return process, and the air conditioner is given a larger power conditioning space. Similarly, during the heating oil return mode, the mixture of the refrigerant and the lubricating oil does not pass through the outdoor heat exchanger, but directly flows back to the compressor through the connecting pipe between the outdoor heat exchanger 103 and the compressor 101, so in order to further reduce the overall operating power of the air conditioner, the outdoor heat exchanger can also be closed during the oil return mode, and a larger power conditioning space is provided for the air conditioner. Therefore, even if the compressor of the air conditioner runs at low frequency for a long time to cause the frequency of the compressor to be increased and the running power of the air conditioner to be increased, the total power used by the whole electric appliance cannot easily exceed the rated power of the generator due to the existence of the power regulating space, and the generator can stably supply power.

In an embodiment of the present application, after the compressor runs at the preset oil return frequency for the preset oil return time, the control method of the air conditioner further includes the following steps:

if the running state of the air conditioner is refrigeration, closing an oil return mode, opening an indoor fan, and controlling the mixture of the refrigerant and the lubricating oil to flow back to the compressor through the indoor heat exchanger;

if the running state of the air conditioner is heating, the oil return mode is closed, the outdoor fan is opened, and the mixture of the refrigerant and the lubricating oil flows back to the compressor through the outdoor heat exchanger.

In the embodiment of the application, the preset oil return time specifically refers to the time of a preset oil return operation mode, and the size of the preset oil return time can be changed according to different specific parameters such as the type and the power of the air conditioner. Exemplarily, if the preset oil return time is 4 minutes, there are: the air conditioner keeps the oil return mode to operate for 4 minutes, and the oil return mode is closed after the operation time reaches 4 minutes.

In the embodiment of the present application, closing the oil return mode may specifically include:

turning on a previously turned off fan, such as turning on a previously turned off indoor fan in the cooling mode, and turning on a previously turned off outdoor fan in the heating mode; and simultaneously closing an electronic valve (namely a second electronic valve) of a connecting pipe between the outdoor heat exchanger and the indoor heat exchanger, enabling the mixture of the refrigerant and the lubricating oil to flow back to the compressor through the indoor heat exchanger in the cooling mode, and enabling the mixture of the refrigerant and the lubricating oil to flow back to the compressor through the outdoor heat exchanger in the heating mode, and controlling the air conditioner to recover the normal running state.

Optionally, the step S305 may further include:

acquiring the current running power of the air conditioner; and if the current power is less than the power of the air conditioner before the oil return mode is operated, increasing the operation frequency of the compressor until the current power is equal to the power of the air conditioner before the oil return mode is operated.

In the aforementioned oil return mode in step S305, a compressor power adjustment function may also be added, and the specific functions are as follows: detecting the current running power of the air conditioner once at certain intervals, comparing the detected current power with the previously recorded power of the air conditioner before the oil return mode, and judging the magnitude relation between the current power and the previously recorded power of the air conditioner before the oil return mode: if the current power is smaller than the power of the air conditioner before the oil return operation mode, the operation frequency of the compressor is synchronously increased, so that the operation power of the compressor is increased until the current power is equal to the power of the air conditioner before the oil return operation mode. The time of the interval may vary with the needs of the user and the designer, and may be, but is not limited to, a 10 second interval. The compressor power adjusting function provided by the embodiment of the application can judge whether the compressor running power is lower than the air conditioner power before the oil return mode by detecting the running power of the compressor, if the compressor running power is lower than the air conditioner power before the oil return mode, the compressor running power is shown to fluctuate, namely, the compressor running frequency fluctuates, so that electric parameters such as current and voltage of the air conditioner fluctuate, and the normal work of the air conditioner is not facilitated.

The above description shows that the compressor power adjusting function provided by the embodiment of the present application can stabilize the compressor operating frequency, so that the compressor operating frequency is kept in a relatively stable range, which is beneficial to the normal operation of an air conditioner circuit, reduces unstable factors of the air conditioner circuit, prolongs the service life of each component in the air conditioner circuit, reduces the damage to a generator, and can also reduce the power supply parameter fluctuation and the damage to other electric appliances.

Alternatively, the oil return mode may be executed in step S305 by first executing the heating oil return mode and then executing the cooling oil return mode, or by first executing the cooling oil return mode and then executing the heating oil return mode, similar to an iterative operation of a program. The switching between the heating oil return mode and the cooling oil return mode can be realized by the four-way valve in fig. 1, and the switching basis can be the number of times of operating a certain oil return mode, the duration of operating a certain oil return mode, and the like, which is not specifically limited in the present application.

For example, if the switching criterion is the number of times of operating the oil return mode, the operating the oil return mode in step S305 may further include the following steps:

counting the times of the air conditioner running in the refrigeration oil return mode;

if the times of the refrigeration oil return mode are larger than a first preset time threshold value, after the refrigeration oil return mode is operated, the heating oil return mode is operated;

or, counting the times of the air conditioner running in the heating oil return mode;

and if the times of the heating oil return mode are greater than the second preset time threshold, operating the refrigeration oil return mode after the heating oil return mode is finished.

In the embodiment of the present application, the first preset time threshold and the second preset time threshold may be the same or different, and the value may be selected according to the time requirement. For example, the first preset time threshold may be selected to be 5 times, the second preset time threshold may be selected to be 3 times or 5 times, and the like according to parameters such as the type and the power of the air conditioner.

It should be noted that, if the operating frequency of the compressor is greater than the second frequency threshold included in the oil return condition, and the duration time that the operating frequency of the compressor is greater than the second frequency threshold included in the oil return condition is greater than the second preset time threshold, the numbers of the refrigeration oil return mode and the heating oil return mode are reset and counted again. The second preset time threshold may be different according to different parameters such as the model and power of the air conditioner.

Specifically, if the first preset time threshold is 5 times, the air conditioner is in a refrigerating state, and when the second preset time threshold is 30min and the number of times N of running oil return of the air conditioner is more than or equal to 5 times, after the air conditioner runs a refrigerating oil return mode, the four-way valve reversing air conditioner runs a heating oil return mode, and after the running heating oil return mode is finished, the air conditioner starts to run normally; and if the running frequency of the air conditioner is greater than a second frequency threshold value included in the oil return condition, returning oil and running for more than 30min, and clearing and recounting the number N of times of oil return running of the air conditioner.

Correspondingly, if the second preset time threshold is 3 times, if the air conditioner is in a heating state, and the second preset time threshold is 30min, when the number of times N of oil return operation of the air conditioner is more than or equal to 3 times, after the heating oil return operation mode of the air conditioner is finished, reversing the four-way valve to enable the air conditioner to operate in a cooling oil return mode, and after the cooling oil return operation mode is finished, the air conditioner starts to normally operate; and when the running frequency of the air conditioner is greater than a second frequency threshold value included in the oil return condition, returning oil and running for more than 30min, and clearing and recounting the number N of times of oil return running of the air conditioner. The second frequency threshold is a preset value included in the oil return condition, and can be obtained after the oil return condition is selected.

The embodiment of the application can record the times of the air conditioner running in the oil return mode, the four-way valve is reversed after the times of the air conditioner running in the oil return mode reach the preset oil return times N, the air conditioner runs in another corresponding oil return mode, the times N of the air conditioner running in the oil return mode are reset and counted again after the requirements are met, the aging of an air conditioner circuit and the damage of components caused by the fact that the air conditioner runs in one oil return mode for a long time can be effectively avoided, and the service life and the maintenance period of the air conditioner are prolonged.

For another example, if the switching criterion is a duration of a certain operation oil return mode, the operation oil return mode in step S305 may further include the following steps:

when the air conditioner is in a refrigeration running state, recording the continuous running time of the air conditioner running in a refrigeration oil return mode, and if the continuous running time of the air conditioner running in the refrigeration oil return mode is greater than a first switching time threshold value, running in a heating oil return mode after the refrigeration oil return mode is finished;

or when the air conditioner is in a heating operation state, recording the continuous operation time of the air conditioner in the heating oil return mode, and if the continuous operation time of the air conditioner in the heating oil return mode is greater than the second switching time threshold, operating the cooling oil return mode after the heating oil return mode is finished.

In the embodiment of the present application, the first switching time threshold and the second switching time threshold may be the same or different, and the value may be selected according to actual needs. For example, the first switching time threshold and the second switching time threshold may be both 2 hours or the like according to parameters such as the model and the power of the air conditioner.

The embodiment of the application can record the duration of the oil return mode of the air conditioner, and the four-way valve is reversed after the duration of the oil return mode of the air conditioner reaches the preset switching time threshold value, so that the air conditioner runs another corresponding oil return mode, the aging of an air conditioner circuit and the damage of components caused by the fact that the air conditioner runs one oil return mode for a long time can be effectively avoided, and the service life and the maintenance period of the air conditioner are prolonged.

Optionally, the control method of the air conditioner in the embodiment of the present application may further include the following steps:

s306, acquiring the total power of the power supply and the total power of the electric appliance, and if the total power of the power supply is less than the total power of the electric appliance, determining the frequency of the compressor as the limit frequency.

In the embodiment of the application, in order to stabilize the power supply of the generator and protect the safe operation of other electrical appliances, the air conditioner reduces the overall operation frequency of the air conditioner in a frequency limiting mode, namely, the operation frequency of the compressor is reduced to the frequency limiting through the processor, so that the power of the air conditioner is reduced, and the effect of reducing the power consumption is achieved. Optionally, when the processor reduces the operating frequency of the compressor to the limiting frequency, the overall power of the air conditioner can be monitored and recorded as the raw data for subsequent power consumption data analysis.

Based on the foregoing description, taking the operation state as the cooling mode of cooling before operation as an example, as shown in fig. 4, the control method of the air conditioner in the embodiment of the present application specifically includes the following steps:

step S401: acquiring the operating parameters and the operating state of the air conditioner;

step S402: selecting corresponding oil return conditions according to the operation parameters and the operation state;

step S403: acquiring the running frequency of a compressor;

step S404: judging whether the running frequency of the compressor is lower than a first frequency threshold value contained in an oil return condition or not;

step S405: if the running frequency of the compressor is lower than a first frequency threshold value contained in the oil return condition, acquiring the duration time of the running frequency of the compressor which is lower than the first frequency threshold value contained in the oil return condition;

step S406: judging whether the duration time is greater than a first preset time threshold value contained in the oil return condition;

step S407: and if the duration time is greater than a first preset time threshold value included in the oil return condition, operating the oil return mode.

The embodiment of the application assumes an air conditioner operation refrigeration mode, when the total power used by all electrical appliances exceeds the power of a generator, the operation parameters and the operation state of the air conditioner are obtained through step S401, the corresponding oil return condition is selected from the data in table 1 according to the operation parameters and the operation state result through step S402, the operation frequency of the compressor is obtained through step S403, whether the operation frequency of the compressor meets the oil return condition or not is judged through steps S404 to S406, if the operation frequency of the compressor meets the oil return condition, the refrigeration oil return mode is operated through step S407, at this time, an electronic valve (i.e., a second electronic valve 106) of a connecting pipe between an indoor heat exchanger and an outdoor heat exchanger in fig. 1 is closed, the electronic valve (i.e., a first electronic valve 105) of the connecting pipe between the outdoor heat exchanger and the compressor is opened, and an indoor fan is closed, at this time, a mixture of lubricating oil and a refrigerant does not flow through the indoor heat exchanger, the volume and the power of the whole refrigeration system are reduced, and the power of the whole air conditioner is reduced because the indoor fan is closed.

The current running power of the air conditioner can be detected once at regular intervals (such as 10 seconds), the detected current power is compared with the previously recorded air conditioner power before the oil return mode, the magnitude relation between the current power and the previously recorded air conditioner power before the oil return mode is judged, and if the current power is smaller than the air conditioner power before the oil return mode is operated, the running frequency of the compressor is increased, so that the running power of the compressor is increased correspondingly until the current power is equal to the air conditioner power before the oil return mode is operated.

After a period of time, the number of times of the air conditioner running in the refrigeration oil return mode can be counted; and if the number of times of the refrigeration oil return mode is greater than a first preset number threshold (for example, 5 times), operating the heating oil return mode after the refrigeration oil return mode is finished.

From the above description, it can be known that, in the embodiment of the present application, when the total power of the electrical appliance exceeds the power of the generator, the corresponding oil return condition is selected according to the operation parameter and the operation state, the operation frequency of the compressor is obtained to control the operation oil return mode, the indoor fan is turned off in the refrigeration oil return mode, and the mixture of the refrigerant and the lubricating oil directly flows back to the compressor, or the outdoor fan is turned off in the heating oil return mode, and the mixture of the refrigerant and the lubricating oil directly flows back to the compressor, so that the power consumption of the air conditioner can be reduced, the generator can stably output, the damage to the generator is reduced, and the fluctuation of the power supply parameter and the damage to other electrical appliances can also be reduced.

Referring to fig. 5, an embodiment of the present invention further provides a control apparatus for an air conditioner, including:

the acquiring module 500 is used for acquiring operation parameters and operation states of the air conditioner, wherein the operation parameters comprise indoor temperature, indoor fan rotating speed, outdoor temperature and outdoor fan rotating speed, and the operation states comprise refrigeration or heating;

the selection module 501 is configured to select a corresponding oil return condition according to the operation parameter and the operation state, where the oil return condition is a condition that needs to be met by operating an oil return mode;

the operation module 502 is configured to obtain an operation frequency of the compressor, and if the operation frequency of the compressor meets an oil return condition, operate an oil return mode, where the oil return mode includes a refrigeration oil return mode and a heating oil return mode; the refrigeration oil return mode is that an indoor fan is closed in the oil return process, so that the mixture of the refrigerant and the lubricating oil flows back to the compressor; the heating oil return mode is to turn off the outdoor fan in the oil return process so that the mixture of the refrigerant and the lubricating oil flows back to the compressor.

It can be seen that the contents in the foregoing method embodiments are all applicable to this apparatus embodiment, the functions specifically implemented by this apparatus embodiment are the same as those in the foregoing method embodiments, and the beneficial effects achieved by this apparatus embodiment are also the same as those achieved by the foregoing method embodiments.

Referring to fig. 6, an embodiment of the present application provides a control apparatus of an air conditioner, including:

at least one processor 601;

at least one memory 602 for storing at least one program;

the at least one program, when executed by the at least one processor 601, causes the at least one processor 601 to implement the control method of the air conditioner of the foregoing embodiment.

Similarly, the contents in the method embodiments are all applicable to the apparatus embodiment, the functions specifically implemented by the apparatus embodiment are the same as those in the method embodiments, and the beneficial effects achieved by the apparatus embodiment are also the same as those achieved by the method embodiments.

The embodiment of the invention also provides an air conditioner which comprises the control device of the air conditioner shown in fig. 5 or fig. 6.

Similarly, the content of the above method embodiments is applicable to the present air conditioner embodiment, the functions specifically implemented by the present air conditioner embodiment are the same as those of the above method embodiments, and the beneficial effects achieved by the present air conditioner embodiment are also the same as those achieved by the above method embodiments.

An embodiment of the present invention further provides a storage medium, which stores a program, and the program is used to implement the control method of the foregoing embodiment when executed by a processor.

The contents in the above method embodiments are all applicable to the present storage medium embodiment, and the functions implemented in the present storage medium embodiment are the same as those in the above method embodiments.

Similarly, the contents in the foregoing method embodiments are all applicable to this storage medium embodiment, the functions specifically implemented by this storage medium embodiment are the same as those in the foregoing method embodiments, and the advantageous effects achieved by this storage medium embodiment are also the same as those achieved by the foregoing method embodiments.

In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed, and in which sub-operations described as part of larger operations are performed independently.

Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and/or features may be integrated in a single physical device and/or software module, or one or more of the functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims

1. A method of controlling an air conditioner, comprising:

the oil return mode comprises a refrigeration oil return mode and a heating oil return mode; the refrigeration oil return mode is to close the indoor fan in the oil return process so that the mixture of the refrigerant and the lubricating oil flows back to the compressor; the heating oil return mode is to turn off an outdoor fan in an oil return process so that a mixture of the refrigerant and the lubricating oil flows back to the compressor.

2. The control method of an air conditioner according to claim 1, wherein before acquiring the operation parameters and the operation state of the air conditioner, the control method further comprises:

3. The method as claimed in claim 1, wherein a connection pipe is provided between the outdoor heat exchanger of the air conditioner and the compressor, and the refrigerant and the lubricant oil are returned to the compressor through the connection pipe in the oil return mode.

4. The method according to claim 1, wherein the obtaining of the operating frequency of the compressor, and if the operating frequency of the compressor meets the oil return condition, operating an oil return mode specifically includes:

acquiring the running frequency of a compressor;

if the compressor running frequency is lower than a first frequency threshold value contained in the oil return condition, acquiring the duration time of the compressor running frequency lower than the first frequency threshold value;

and if the duration is greater than a first preset time threshold value included in the oil return condition, operating an oil return mode.

5. The method according to claim 4, wherein the operating the oil return mode specifically includes:

6. The control method of an air conditioner according to claim 5, wherein after controlling the compressor to operate at a preset oil return frequency for a preset oil return time, the control method further comprises:

7. The control method of an air conditioner according to claim 1, wherein the operating oil return mode includes:

acquiring the current running power of the air conditioner;

8. The control method of an air conditioner according to claim 1, characterized in that the control method further comprises:

counting the number of times the air conditioner operates in the refrigeration oil return mode; if the number of times of the refrigeration oil return mode is greater than a first preset number threshold, after the refrigeration oil return mode is operated, operating the heating oil return mode;

9. The control method of an air conditioner according to claim 8, characterized in that the control method further comprises:

10. A control apparatus of an air conditioner, comprising:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring operation parameters and operation states of the air conditioner, the operation parameters comprise indoor temperature, indoor fan rotating speed, outdoor temperature and outdoor fan rotating speed, and the operation states comprise refrigeration or heating;

the selection module is used for selecting corresponding oil return conditions according to the operation parameters and the operation state, wherein the oil return conditions are conditions required to be met by operating an oil return mode;

the operation module is used for acquiring the operation frequency of a compressor, and if the operation frequency of the compressor meets the oil return condition, an oil return mode is operated, wherein the oil return mode comprises a refrigeration oil return mode and a heating oil return mode; the refrigeration oil return mode is to close the indoor fan in the oil return process so that the mixture of the refrigerant and the lubricating oil flows back to the compressor; the heating oil return mode is to turn off the outdoor fan in the oil return process to enable the mixture of the refrigerant and the lubricating oil to flow back to the compressor.

11. A control device of an air conditioner, comprising:

at least one processor;

at least one memory for storing at least one program;

the method according to any of claims 1-9, when at least one of said programs is executed by at least one of said processors.

12. An air conditioner characterized by comprising the control device according to claim 10 or 11.

13. A storage medium storing a program executable by a processor, the program being executed by the processor to implement the control method of the air conditioner according to any one of claims 1 to 9.