WO2019233034A1

WO2019233034A1 - Air conditioning system and oil retrieval control method and device therefor

Info

Publication number: WO2019233034A1
Application number: PCT/CN2018/114627
Authority: WO
Inventors: 卜其辉; 许永锋; 梁伯启; 李宏伟; 董世龙; 吴孔祥; 吴晓鸿; 张宇
Original assignee: 广东美的暖通设备有限公司; 美的集团股份有限公司
Priority date: 2018-06-08
Filing date: 2018-11-08
Publication date: 2019-12-12
Also published as: CN108759205A

Abstract

An air conditioning system and an oil retrieval control method and device therefor. The oil retrieval control method comprises the following steps: receiving a start-up operation instruction of an air conditioning system (S1); upon receiving the start-up operation instruction, controlling the air conditioning system to operate and starting timing (S2); acquiring the number of start-ups of a compressor in the air conditioning system in different timing periods, and controlling the air conditioning system to retrieve oil according to the number of start-ups (S3). As such, the present invention can ensure that a compressor does not operate at a low level of oil due to frequent start-ups, thus effectively improving the performance of an air conditioning system.

Description

Air conditioning system and oil return control method and device of air conditioning system

Cross-reference to related applications

This application is based on a Chinese patent application with an application number of 201810587939.0 and an application date of June 08, 2018, and claims the priority of the Chinese patent application. The entire contents of the Chinese patent application are incorporated herein by reference.

Technical field

The present application relates to the field of refrigeration technology, and in particular, to an oil return control method for an air conditioning system, an oil return control device for an air conditioning system, and an air conditioning system.

Background technique

With the increasing number of multi-connected air-conditioning models (referred to as multi-connected), it has many advantages such as energy saving, intelligent adjustment, precise temperature control, high degree of automation, flexible use, and convenient management. Applications are increasingly widespread. Generally, because the multi-connected pipeline is longer, there are more locations where oil can be stored. As the system operating time increases, the accumulated lubricant in the system pipeline will be more and more. If the oil is not returned in time, the compressor Damage can occur due to lack of lubricant.

In response to the above problems, the conventional method is to perform oil return operation after a fixed period of multiple online operations. The oil return operation is generally switched to cooling operation to bring the lubricant in the system pipeline back to the outdoor unit to avoid the compressor ’s lack of oil. run.

However, during the operation of the system, compressors often start and stop frequently, and each time the compressor starts, a large amount of oil is discharged. If the compressor is frequently started in a short period of time, and the system runs short of time, Will lead to normal oil return, will also cause the compressor to run out of oil.

Application content

This application is intended to solve at least one of the technical problems in the related technology. For this reason, the first object of the present application is to propose an oil return control method for an air conditioning system, which can ensure that the compressor will not run out of oil due to frequent startup, effectively improve the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

A second object of the present application is to propose a non-transitory computer-readable storage medium.

A third object of the present application is to provide an oil return control device for an air conditioning system.

A fourth object of the present application is to propose an air conditioning system.

In order to achieve the above object, an embodiment of the first aspect of the present application proposes a method for controlling oil return of an air conditioning system, including the following steps: receiving a startup operation instruction of the air conditioning system; and controlling the air conditioner after receiving the startup operation instruction The system runs and starts timing; obtains the number of starts of the compressor in the air-conditioning system at different timings, and controls the air-conditioning system to perform oil return according to the number of starts.

According to the oil return control method of the air-conditioning system according to the embodiment of the present application, receiving a start-up operation instruction of the air-conditioning system, and after receiving the start-up operation instruction, controlling the operation of the air-conditioning system and starting timing, obtaining compressors in the air-conditioning system at different timing times The number of starts and controls the air conditioning system to return oil according to the number of starts. Therefore, it is possible to ensure that the compressor does not run out of oil due to frequent start-up, effectively improve the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

In addition, the oil return control method of the air-conditioning system according to the foregoing embodiment of the present application may also have the following additional technical features:

In an embodiment of the present application, the obtaining the number of startups of the compressor in the air-conditioning system at different timings and controlling the air-conditioning system to perform oil return according to the startups includes: The number of starts of the compressor at a preset time; determining whether the number of starts is greater than or equal to the first preset number; if the number of starts is greater than or equal to the first preset number, when the compressor is restarted , Controlling the air conditioning system to perform oil return and restart the timing.

In an embodiment of the present application, if the number of starts is less than the first preset number, then the number of starts of the compressor when the timing time reaches a second preset time is obtained, where the second The preset time is greater than the first preset time; determining whether the number of starts is greater than or equal to the second preset number; if the number of starts is greater than or equal to the second preset number, when the compressor is started again , Controlling the air conditioning system to perform oil return and restart the timing.

In an embodiment of the present application, if the number of starts is less than the second preset number of times, when the timing time reaches a third preset time, directly control the air conditioning system to perform oil return and restart Timing, wherein the third preset time is greater than the second preset time.

In order to achieve the above object, an embodiment of the second aspect of the present application proposes a non-transitory computer-readable storage medium on which a computer program is stored, which is executed by a processor to implement the foregoing oil return control method of the air conditioning system.

According to the non-transitory computer-readable storage medium of the embodiment of the present application, by implementing the oil return control method of the air conditioning system described above, it is possible to ensure that the compressor does not run out of oil due to frequent startup, and effectively improves the capacity and energy efficiency of the air conditioning system, and The method is simple and easy.

In order to achieve the above object, an embodiment of the third aspect of the present application proposes an oil return control device for an air conditioning system, including: an instruction receiving module for receiving a startup operation instruction of the air conditioning system; and a control module for receiving the After the start-up operation instruction, the air-conditioning system is controlled to run, and the timer is started to count, and the number of startups of the compressor in the air-conditioning system at different timings is obtained, and the air-conditioning system is controlled to perform oil return according to the startup times. .

According to the oil return control device of the air-conditioning system according to the embodiment of the present application, the start-up operation instruction of the air-conditioning system is received through the instruction receiving module, and after receiving the start-up operation instruction, the air-conditioning system is controlled by the control module, and the timer starts to count, It also obtains the number of starts of the compressor in the air-conditioning system at different timings, and controls the air-conditioning system to return oil according to the number of starts. Therefore, it is possible to ensure that the compressor does not run out of oil due to frequent start-up, effectively improve the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

In addition, the oil return control device of the air conditioning system according to the foregoing embodiment of the present application may also have the following additional technical features:

In an embodiment of the present application, the control module is specifically configured to obtain the number of startups of the compressor when the timing time reaches the first preset time, and determine whether the number of startups is greater than or equal to the first preset number of times, If the number of starts is equal to or greater than the first preset number of times, when the compressor is restarted, the air conditioning system is controlled to perform oil return, and the timer is started again through the timer.

In an embodiment of the present application, the control module is further specifically configured to: if the number of starts is less than the first preset number of times, obtain the time of the compressor when the timing time reaches a second preset time. The number of starts and determining whether the number of starts is greater than or equal to the second preset number of times, and if the number of starts is greater than or equal to the second preset number of times, when the compressor is restarted, controlling the air conditioning system to return And restart timing, wherein the second preset time is greater than the first preset time.

In an embodiment of the present application, the control module is further specifically configured to: if the number of starts is less than the second preset number, when the timing time reaches a third preset time, directly control the The air conditioning system performs oil return and restarts timing, wherein the third preset time is greater than the second preset time.

To achieve the above object, an embodiment of the fourth aspect of the present application provides an air conditioning system including the oil return control device of the air conditioning system.

According to the air-conditioning system of the embodiment of the present application, the oil return control device of the air-conditioning system described above can ensure that the compressor does not run out of oil due to frequent startup, effectively improves the capacity and energy efficiency of the air-conditioning system, and the method is simple and easy to implement.

Additional aspects and advantages of the present application will be given in part in the following description, part of which will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

1 is a flowchart of a method for controlling oil return of an air conditioning system according to an embodiment of the present application;

FIG. 2 is a flowchart of a method for controlling oil return of an air conditioning system according to an embodiment of the present application.

3 is a schematic diagram of oil return control in a first timing cycle according to an embodiment of the present application;

4 is a schematic diagram of oil return control in a second timing cycle according to an embodiment of the present application;

5 is a schematic diagram of oil return control in a third timing period according to an embodiment of the present application;

6 is a schematic block diagram of an oil return control device of an air conditioning system according to an embodiment of the present application.

Detailed ways

Hereinafter, embodiments of the present application are described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

Hereinafter, an oil return control method, a non-transitory computer-readable storage medium, an oil return control device of an air conditioning system, and an air conditioning system according to an embodiment of the present application will be described with reference to the drawings.

FIG. 1 is a flowchart of a method for controlling oil return of an air conditioning system according to an embodiment of the present application. As shown in FIG. 1, the oil return control method of the air conditioning system in the embodiment of the present application includes the following steps:

S1. Receive a start-up operation instruction of the air-conditioning system.

Specifically, a start-up operation instruction may be received through a receiving module built into the air-conditioning system. The specific process may be that, when the air-conditioning system is powered on, the user can send a start-up operation instruction to the air-conditioning system by pressing a start button on the remote control.

It should be noted that the above-mentioned receiving start-up operation instruction of the air-conditioning system is only exemplary, and is not specifically limited herein.

S2. After receiving the start-up operation instruction, the air-conditioning system is controlled to run, and the timing is started.

Specifically, after receiving the start-up operation instruction, the air-conditioning system starts to operate, and performs timing through a timing module built into the air-conditioning system.

S3. Obtain the number of starts of the compressor in the air-conditioning system at different timings, and control the air-conditioning system to return oil according to the number of starts.

Specifically, the compressor in the air-conditioning system is a complex machine that runs at high speed. Ensuring sufficient lubrication of the compressor's crankshaft, bearings, connecting rods, pistons and other mechanical moving parts is the basic requirement to maintain the machine's operation. Once the lubrication is insufficient, it will cause Friction or scratching of the bearing surface can cause accidents such as shaft suspending, piston jamming in the cylinder, and connecting rod bending and breaking.

Take a multi-line air conditioning system as an example. Due to the long pipeline of the multi-line air conditioning system, there are many places where oil can be stored. With the increase of the system operating time, the accumulated oil in the system pipeline will be more and more. If the oil is not returned in time, the compressor will Damage due to lack of lubricant. The conventional method is to perform the oil return operation after the multi-line air-conditioning system runs for a fixed period of time, so as to bring the lubricating oil in the system pipeline back to the outdoor unit to avoid the compressor running out of oil.

However, during the operation of the system, compressors often start and stop frequently, and each time the compressor starts, a large amount of oil is discharged. If the compressor is frequently started in a short period of time, and the system is running short, Will lead to normal oil return, will also cause the compressor to run out of oil.

Therefore, in the embodiments of the present application, the number of compressor starts in the air-conditioning system in different time periods can be obtained, and whether the air-conditioning system returns to oil according to the number of starts can be ensured to ensure that the compressor will not run out of oil due to frequent starts, which is effective Improved compressor reliability and system energy efficiency.

In an embodiment of the present application, as shown in FIG. 2, obtaining the number of startups of the compressor in the air-conditioning system at different time intervals and controlling the air-conditioning system to perform oil return according to the number of startups includes the following steps:

S201. Obtain the number of startup times of the compressor when the timing time reaches the first preset time. The first preset time can be calibrated according to the actual situation.

S202. Determine whether the number of startups is greater than or equal to the first preset number of times. If the number of starts is greater than or equal to the first preset number, step S203 is performed; otherwise, step S204 is performed. The first preset number of times can be calibrated according to the actual situation.

S203: When the compressor is restarted, the air-conditioning system is controlled to perform oil return and restart the timing.

Specifically, as shown in FIG. 3, after receiving the start-up operation instruction of the air-conditioning system, the air-conditioning system is controlled to run, and the timing is started, and the number of starts of the compressor is recorded at the same time. It is assumed that the value of the first preset number of times is 5, and when the counting time reaches the first preset time t1, if the recorded number of starts of the compressor is 5, then when the compressor is started again, that is, at the sixth start, Directly control the system for oil return operation to prevent the compressor from running out of oil due to frequent startup, and then switch to normal operation and restart timing, while re-recording the number of compressor starts; otherwise, the system does not perform oil return operation, and Continue timing and continue to superimpose the number of compressor starts.

S204. Obtain the number of times the compressor is started when the timing time reaches a second preset time, wherein the second preset time is greater than the first preset time, and the second preset time may be calibrated according to actual conditions.

S205: Determine whether the number of startups is greater than or equal to a second preset number of times. If the number of starts is greater than or equal to the second preset number, step S206 is performed; otherwise, step S207 is performed. The second preset number of times is greater than the first preset number of times, and the second preset number of times can be calibrated according to actual conditions.

S206. When the compressor is restarted, the air-conditioning system is controlled to perform oil return and restart the timing.

Specifically, as shown in FIG. 4, after receiving the start-up operation instruction of the air-conditioning system, the air-conditioning system is controlled to run, and timing is started, and the number of starts of the compressor is recorded at the same time. Assume that the first preset number of times is 5 and the second preset number of times is 7. When the counted time reaches the first preset time t1, if the recorded number of starts of the compressor is 5, then the compressor Start again, that is, at the 6th start, directly control the system for oil return operation, then switch to normal operation, restart the timing, and re-record the number of compressor starts (as shown in Figure 3).

If the number of recorded compressor starts is 4, when the compressor starts again, that is, the fifth start, the system does not perform oil return operation. At this time, the timer is continued and the compressor starts are superimposed. Then, it is determined whether the timing time reaches the second preset time t2, and if the timing time reaches the second preset time t2, the number of startup times of the compressor recorded at this time is obtained. If the recorded number of starts is 7, then when the compressor starts again, that is, at the 8th start, directly control the system for oil return operation to prevent the compressor from running out of oil due to frequent starts, and then switch to normal operation and restart Start timing and re-record the number of compressor starts; otherwise, the system will not perform oil return operation and continue timing.

S207. When the timing time reaches the third preset time, directly control the air-conditioning system to return the oil and restart the timing. The third preset time is greater than the second preset time, and the third preset time may be performed according to the actual situation. Calibration.

Specifically, as shown in FIG. 5, after receiving the start-up operation instruction of the air-conditioning system, the air-conditioning system is controlled to run, and the timing is started, and the number of starts of the compressor is recorded at the same time. Assume that the first preset number of times is 5 and the second preset number of times is 7. When the counted time reaches the first preset time t1, if the recorded number of starts of the compressor is 5, then the compressor Start again, that is, at the 6th start, directly control the system for oil return operation, then switch to normal operation, restart the timing, and re-record the number of compressor starts (as shown in Figure 3).

If the number of recorded compressor starts is 4, when the compressor starts again, that is, the fifth start, the system does not perform oil return operation. At this time, the timer is continued and the compressor starts are superimposed. Then, it is determined whether the timing time reaches the second preset time t2, and if the timing time reaches the second preset time t2, the number of startup times of the compressor recorded at this time is obtained. If the recorded number of starts is 7, then when the compressor starts again, that is, at the 8th start, directly control the system for oil return operation, and then switch to normal operation and restart the timing, while re-recording the number of compressor starts (As shown in Figure 4).

And if the recorded number of startups of the compressor is 6, the timing is continued, and it is determined whether the timing time reaches the third preset time t3. If the timing time reaches the third preset time t3, the control system performs an oil return operation and restarts the timing, and at the same time records the number of times the compressor is started, thereby ensuring normal oil return when the compressor is not frequently started. And when the timing reaches the second preset time t2 to the third preset time t3, no oil is returned to the system.

Therefore, according to the number of compressor start-stops in different time periods, whether to directly enter the oil return operation when the compressor is started next time is ensured to ensure that the compressor will not cause oil shortage operation due to frequent startup.

It should be noted that the above example is described by taking three time periods as an example. In practical applications, two time periods may also be set (for example, the judgment of the second preset time t2 is omitted) or more time may be set. The segment (for example, the judgment of adding a fourth preset time t4 between the second preset time t2 and the third preset time t3) is selected and set according to actual needs, which is not limited here.

According to the oil return control method of the air-conditioning system provided in the embodiment of the present application, after receiving the start-up operation instruction of the air-conditioning system, and after receiving the start-up operation instruction, the air-conditioning system is controlled to run, and timing is started to obtain compression in the air-conditioning system at different timings The number of start-ups of the engine, and the air-conditioning system is controlled to return oil according to the number of start-ups. Therefore, it is possible to ensure that the compressor does not run out of oil due to frequent start-up, effectively improve the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

In addition, the embodiment of the present application also proposes a non-transitory computer-readable storage medium on which a computer program is stored, which is executed by a processor to implement the foregoing oil return control method of the air conditioning system.

According to the non-transitory computer-readable storage medium of the embodiment of the present application, by implementing the oil return control method of the air conditioning system described above, it is possible to ensure that the compressor does not run out of oil due to frequent startup, and effectively improves the capacity and energy efficiency of the air conditioning system. The method is simple and easy.

6 is a schematic block diagram of an oil return control device of an air conditioning system according to an embodiment of the present application. As shown in FIG. 6, the oil return control device of the air conditioning system includes a command receiving module 100 and a control module 200.

The instruction receiving module 100 is configured to receive a startup operation instruction of the air conditioning system. The control module 200 is used to control the operation of the air-conditioning system after receiving the start-up operation instruction, start the timer through a timer, and obtain the number of starts of the compressor in the air-conditioning system at different timings, and control the air-conditioning system to return oil according to the number of starts. .

In one embodiment of the present application, the control module 200 is specifically configured to obtain the number of startup times of the compressor when the timing time reaches the first preset time, and determine whether the number of startup times is greater than or equal to the first preset number of times, and if the number of startup times is greater than or equal to For the first preset number of times, when the compressor is restarted, the air-conditioning system is controlled to perform oil return, and the timer starts counting again.

In an embodiment of the present application, the control module 200 is further specifically configured to: if the number of starts is less than the first preset number, obtain the number of starts of the compressor when the timing time reaches the second preset time, and determine whether the number of starts is greater than It is equal to the second preset number of times. If the number of starts is greater than or equal to the second preset number of times, when the compressor is restarted, the air conditioning system is controlled to perform oil return and restart the timing, wherein the second preset time is greater than the first preset number of times. time.

In an embodiment of the present application, the control module 200 is further specifically configured to directly control the air-conditioning system to perform oil return when the number of start times is less than the second preset number of times, and restart the air-conditioning system. Timing, wherein the third preset time is greater than the second preset time.

It should be noted that the foregoing explanation of the embodiment of the method for controlling the oil return of the air-conditioning system is also applicable to the device for controlling the oil return of the air-conditioning system of this embodiment, and details are not described herein again.

According to the oil return control device of the air-conditioning system provided by the embodiment of the present application, the start-up operation instruction of the air-conditioning system is received through the instruction receiving module, and after receiving the start-up operation instruction, the air-conditioning system is controlled by the control module, and the timer starts to count , And obtain the number of compressor starts in the air-conditioning system at different timings, and control the air-conditioning system to return oil according to the number of starts. Therefore, it is possible to ensure that the compressor does not run out of oil due to frequent start-up, effectively improve the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

In addition, an embodiment of the present application further provides an air conditioning system including the oil return control device of the air conditioning system described above.

According to the air conditioning system provided in the embodiment of the present application, the oil return control device of the air conditioning system can ensure that the compressor does not run out of oil due to frequent start-up, effectively improves the capacity and energy efficiency of the air conditioning system, and the method is simple and easy to implement.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear "," left "," right "," vertical "," horizontal "," top "," bottom "," inside "," outside "," clockwise "," counterclockwise "," axial ", The directions or positional relationships indicated by “radial” and “circumferential” are based on the positional or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the device or element referred to. It must have a specific orientation and be constructed and operated in a specific orientation, so it cannot be understood as a limitation on this application.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless it is specifically and specifically defined otherwise.

In this application, the terms "installation," "connected," "connected," and "fixed" should be understood broadly unless otherwise specified and limited, for example, they may be fixed connections or removable connections Or integrated; it can be mechanical or electrical; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless explicitly stated and limited otherwise, the first feature "on" or "down" of the second feature may be the first and second features in direct contact, or the first and second features indirectly through an intermediate medium. contact. Moreover, the first feature is "above", "above", and "above" the second feature. The first feature is directly above or obliquely above the second feature, or it only indicates that the first feature is higher in level than the second feature. The first feature is “below”, “below”, and “below” of the second feature. The first feature may be directly below or obliquely below the second feature, or it may simply indicate that the first feature is less horizontal than the second feature.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” and the like means specific features described in conjunction with the embodiments or examples , Structure, materials, or features are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms are not necessarily directed 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. In addition, without any contradiction, those skilled in the art may combine and combine different embodiments or examples and features of the different embodiments or examples described in this specification.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those skilled in the art can interpret the above within the scope of the present application. Embodiments are subject to change, modification, substitution, and modification.

Claims

An oil return control method for an air conditioning system is characterized in that it includes the following steps:

Receive the start-up operation instructions of the air-conditioning system;

After receiving the start-up operation instruction, controlling the air-conditioning system to run and start timing;

Obtain the number of startups of the compressor in the air conditioning system at different timings, and control the air conditioning system to perform oil return according to the number of startups.
The oil return control method for an air-conditioning system according to claim 1, wherein the number of times of starting the compressor in the air-conditioning system at different time intervals is obtained, and the air-conditioning system is controlled to perform the returning operation according to the number of starts. Oil, including:

Obtaining the number of starts of the compressor when the timing time reaches the first preset time;

Determining whether the number of starts is greater than or equal to a first preset number;

If the number of starts is greater than or equal to the first preset number of times, when the compressor is restarted, the air conditioning system is controlled to perform oil return and restart the timing.
The oil return control method for an air conditioning system according to claim 2, wherein if the number of starts is less than the first preset number of times, obtaining the compressor when the timing time reaches a second preset time The number of startup times, wherein the second preset time is greater than the first preset time;

Determining whether the number of starts is greater than or equal to a second preset number;

If the number of starts is greater than or equal to the second preset number of times, when the compressor is restarted, the air conditioning system is controlled to perform oil return and restart the timing.
The oil return control method for an air-conditioning system according to claim 3, wherein if the number of starts is less than the second preset number, when the timing time reaches a third preset time, directly controlling the The air conditioning system performs oil return and restarts timing, wherein the third preset time is greater than the second preset time.
A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that when the program is executed by a processor, the method for controlling oil return of the air conditioning system according to any one of claims 1-4 is implemented .
An oil return control device for an air-conditioning system, comprising:

An instruction receiving module, configured to receive a startup operation instruction of the air conditioning system;

A control module, configured to control the operation of the air-conditioning system after receiving the start-up operation instruction, start counting through a timer, and obtain the number of starts of the compressor in the air-conditioning system at different timings, and according to the The number of starts controls the air conditioning system to perform oil return.
The oil return control device of an air conditioning system according to claim 6, wherein the control module is specifically configured to obtain the number of starts of the compressor when the timing time reaches a first preset time, and determine the start of the compressor Whether the number of times is greater than or equal to the first preset number of times, and if the number of starts is greater than or equal to the first preset number of times, when the compressor is restarted, the air conditioning system is controlled to perform oil return and pass the timing again The timer starts timing.
The oil return control device of an air-conditioning system according to claim 7, wherein the control module is further configured to: if the number of startups is less than the first preset number of times, obtaining the timing time reaches a third The number of times the compressor is started at two preset times, and it is determined whether the number of starts is greater than or equal to the second number of times. If the number of starts is greater than or equal to the second number of times, the compressor is restarted again. When starting, controlling the air-conditioning system to return oil and restart timing, wherein the second preset time is greater than the first preset time.
The oil return control device for an air conditioning system according to claim 8, wherein the control module is further configured to, if the number of starts is less than the second preset number, the number of times reaches the At three preset times, the air conditioning system is directly controlled to perform oil return and restart timing, wherein the third preset time is greater than the second preset time.
An air conditioning system, comprising the oil return control device of the air conditioning system according to any one of claims 6-9.