阅读说明：本技术 毛细管网系统的回油方法 (Oil return method of capillary network system ) 是由 范建伟 李龙飞 莫赤虎 于 2019-10-12 设计创作，主要内容包括：本申请提供一种毛细管网系统的回油方法,预设压缩机第一频率阈值f1、压缩机第二频率阈值f2和第一时间阈值,获取毛细管网系统的运行工况及压缩机的运行频率f,当f1≤f≤f2,且压缩机以运行频率f运行的时间T1达到第一时间阈值时,控制压缩机提高运行频率。本发明的实施例中所提供的一种毛细管网系统的回油方法,能够保证压缩机油能够从毛细管网中回流至压缩机内,防止因压缩机油过多地附着在毛细管网内壁上而产生的压缩机缸体磨损现象,进而保证了压缩机的使用寿命。(The application provides an oil return method of a capillary network system, a first frequency threshold f1 of a compressor, a second frequency threshold f2 of the compressor and a first time threshold are preset, the operation working condition of the capillary network system and the operation frequency f of the compressor are obtained, and when f1 is not less than f2, and the time T1 when the compressor operates at the operation frequency f reaches the first time threshold, the compressor is controlled to improve the operation frequency. The oil return method for the capillary network system provided by the embodiment of the invention can ensure that the compressor oil can flow back into the compressor from the capillary network, prevent the abrasion phenomenon of the compressor cylinder body caused by excessive attachment of the compressor oil on the inner wall of the capillary network, and further ensure the service life of the compressor.)

1. An oil return method of a capillary network system is characterized in that a first frequency threshold f1 of a compressor, a second frequency threshold f2 of the compressor and a first time threshold are preset, the operation working condition of the capillary network system and the operation frequency f of the compressor (1) are obtained, and when f1 is not less than f2 and the time T1 that the compressor (1) operates at the operation frequency f reaches the first time threshold, the compressor (1) is controlled to increase the operation frequency.

2. The oil return method of the capillary network system according to claim 1, wherein when the capillary network system is in a refrigeration working condition or a heating working condition, f1 is 15Hz, and f2 is 60 Hz.

3. The oil return method of the capillary network system according to claim 1, wherein when the capillary network system is in a cooling working condition or a heating working condition, the first time threshold is not less than 5 hours.

4. The oil return method of the capillary line system according to claim 1, characterized in that a second time threshold value is preset, the capillary line system is in a heating working condition, when the capillary line system does not perform defrosting operation, the time T1 for the compressor (1) to operate at the operating frequency f reaches the first time threshold value, and the compressor (1) is controlled to increase the operating frequency; when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a second time threshold value, controlling the compressor (1) to increase the operating frequency.

5. The oil return method of the capillary network system according to claim 4, wherein the second time threshold is 40-120 min.

6. Oil return method of a capillary network system according to claim 1, characterized in that a third frequency threshold f3 of the compressor is preset, the capillary network system is in a cooling condition or a heating condition, and when f2 < f ≦ f3 and the time T2 that the compressor (1) is operated at the operating frequency f reaches the third time threshold, the compressor (1) is controlled to increase the operating frequency.

7. The oil return method of the capillary network system according to claim 6, wherein f2 is 60Hz, and f3 is 80 Hz.

8. The oil return method of a capillary network system according to claim 6, wherein the third time threshold is not less than 3 hours.

9. The oil return method of the capillary network system according to claim 6, wherein a fourth time threshold value is preset, the capillary network system is in a heating working condition, when the capillary network system does not perform defrosting operation, the time T2 for the compressor (1) to operate at the operating frequency f reaches the third time threshold value, and the compressor (1) is controlled to increase the operating frequency; when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a fourth time threshold value, controlling the compressor (1) to increase the operating frequency.

10. The oil return method of the capillary network system according to claim 9, wherein the fourth time threshold is 40-120 min.

11. The oil return method of the capillary network system according to claim 6, wherein a fifth time threshold is preset, the capillary network system is in a cooling working condition or a heating working condition, and when f1 is less than or equal to f3, and the sum of T1 and T2 reaches the fifth time threshold, the compressor (1) is controlled to increase the running frequency.

12. The oil return method of a capillary network system according to claim 11, wherein the fifth time threshold is not less than 6 hours.

Technical Field

The application belongs to the technical field of air conditioning, and particularly relates to an oil return method of a capillary network system.

Background

The capillary network system is used for adjusting indoor temperature, and the capillary network has thin and flexible characteristics, can heat and refrigerate as the radiation tail end, and is popular among users. However, in the existing capillary tube network system, the length of the capillary tube is long, the diameter of the capillary tube is small, and when the system is used, compressor oil which circulates in the capillary tube network along with a refrigerant is easily attached to the inner wall of the capillary tube network, so that oil return of the compressor is difficult, the cylinder body of the compressor is abraded, and the service life is influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the present application is to provide an oil return method for a capillary network system, which can ensure that compressor oil can flow back into a compressor from a capillary network, prevent a compressor cylinder body from being worn due to excessive attachment of the compressor oil to the inner wall of the capillary network, and further ensure the service life of the compressor.

In order to solve the problems, the application provides an oil return method of a capillary network system, a first frequency threshold f1 of a compressor, a second frequency threshold f2 of the compressor and a first time threshold are preset, the operation working condition of the capillary network system and the operation frequency f of the compressor are obtained, and when f1 is not less than f2 and the time T1 of the compressor operating at the operation frequency f reaches the first time threshold, the compressor is controlled to improve the operation frequency.

Preferably, when the capillary tube net system is in a refrigerating working condition or a heating working condition, f1 is 15Hz, and f2 is 60 Hz.

Preferably, when the capillary network system is in a cooling working condition or a heating working condition, the first time threshold is not less than 5 hours.

Preferably, a second time threshold value is preset, the capillary line system is in a heating working condition, when the capillary line system does not perform defrosting operation, the time T1 that the compressor operates at the operating frequency f reaches the first time threshold value, and the compressor is controlled to increase the operating frequency; when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a second time threshold value, controlling the compressor to increase the operating frequency.

Preferably, the second time threshold is 40-120 min.

Preferably, a third frequency threshold f3 of the compressor is preset, the capillary network system is in a refrigerating working condition or a heating working condition, and when f2 is more than f and less than or equal to f3, and the time T2 that the compressor operates at the operating frequency f reaches the third time threshold, the compressor is controlled to increase the operating frequency.

Preferably, f2 is 60Hz and f3 is 80 Hz.

Preferably, the third time threshold is not less than 3 hours.

Preferably, a fourth time threshold value is preset, the capillary network system is in a heating working condition, when the capillary network system does not perform defrosting operation, the time T2 for the compressor to operate at the operation frequency f reaches a third time threshold value, and the compressor is controlled to increase the operation frequency; and when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a fourth time threshold value, controlling the compressor to increase the running frequency.

Preferably, the fourth time threshold is 40-120 min.

Preferably, a fifth time threshold is preset, the capillary tube network system is in a refrigerating working condition or a heating working condition, and when f is greater than or equal to f1 and less than or equal to f3, and the sum of T1 and T2 reaches the fifth time threshold, the compressor is controlled to increase the operating frequency.

Preferably, the fifth time threshold is not less than 6 hours.

Advantageous effects

The oil return method for the capillary network system provided by the embodiment of the invention can ensure that the compressor oil can flow back into the compressor from the capillary network, prevent the abrasion phenomenon of the compressor cylinder body caused by excessive attachment of the compressor oil on the inner wall of the capillary network, and further ensure the service life of the compressor.

Drawings

Fig. 1 is a schematic diagram of a system according to an embodiment of the present application.

The reference numerals are represented as:

1. a compressor; 2. a capillary network; 3. and an oil-liquid separator.

Detailed Description

Referring to fig. 1 in combination, according to an embodiment of the present disclosure, the capillary tube network system includes a compressor 1, a capillary tube network 2, and an oil-liquid separator 3, which are connected to each other through a pipeline, when the compressor 1 operates, a part of oil of the compressor 1 and a refrigerant are discharged into the pipeline together, the oil of the compressor 1 flows in the pipeline and the capillary tube network 2 together with the refrigerant, and finally returns to the compressor 1 through the oil-liquid separator 3. In the embodiment, an oil return method of a capillary network system is provided, a first frequency threshold f1 of a compressor 1, a second frequency threshold f2 of the compressor 1 and a first time threshold are preset, the operation condition of the capillary network system and the operation frequency f of the compressor 1 are obtained, and when f1 is not less than f2 and the time T1 that the compressor 1 operates at the operation frequency f reaches the first time threshold, the compressor 1 is controlled to increase the operation frequency. By presetting a first frequency threshold f1 of the compressor 1, a second frequency threshold f2 of the compressor 1 and a first time threshold, when the frequency f of the compressor 1 in the capillary network system is f1 and f2, and the time T1 of the compressor 1 running at the running frequency f reaches the first time threshold, the running frequency of the compressor 1 is increased, the oil of the compressor 1 attached to the inner wall of the capillary network can be quickly washed away and is brought back to the compressor 1 along with a refrigerant, the problem that the oil of the compressor 1 is easy to attach to the inner wall of the capillary network 2 and is difficult to return to the oil of the compressor 1 is solved, the phenomenon that the cylinder body of the compressor 1 is abraded due to the fact that the oil of the compressor 1 is excessively attached to the inner wall of the capillary network 2 is prevented, and the service life of the compressor 1 is further guaranteed.

In this embodiment, when the capillary network system is in the cooling operation or the heating operation, f1 is 15Hz, and f2 is 60 Hz. When the capillary network system is in a refrigeration working condition or a heating working condition, the first time threshold value is not less than 5 hours, oil in the compressor 1 can be guaranteed to be flushed and reflowed to the compressor 1 in time, and normal lubrication of the compressor 1 is guaranteed.

Further, in this embodiment, when the operating frequency f of the compressor 1 is equal to or greater than 15Hz and equal to or less than 60Hz, and the compressor 1 continuously operates for 5 hours at a frequency of 15Hz to 60Hz, the capillary network system controls the compressor 1 to increase the operating frequency, increase the circulation speed of the refrigerant, and flush and flow the oil in the compressor 1 back into the compressor 1 in time.

The capillary network system comprises a refrigeration working condition and a heating working condition, and the heating working condition comprises defrosting operation on the outdoor unit.

In this embodiment, a second time threshold is preset, the capillary network system is in a heating working condition, and when the capillary network system does not perform defrosting operation, the time T1 for the compressor 1 to operate at the operating frequency f reaches the first time threshold, and the compressor 1 is controlled to increase the operating frequency; when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a second time threshold value, controlling the compressor 1 to increase the operating frequency. By respectively arranging two types of control compressors 1 to improve the adjustment of the operating frequency in the heating condition for judging whether the defrosting operation is performed or not, the smooth oil return of the capillary network system under the heating condition is fully ensured.

Further, the capillary tube net system is in a heating working condition, when the capillary tube net system is not subjected to defrosting operation, the operating frequency f of the compressor 1 is more than or equal to 15Hz and less than or equal to 60Hz, and when the compressor 1 continuously operates for 5 hours at the frequency of 15Hz-60Hz, the capillary tube net system controls the compressor 1 to improve the operating frequency, the flowing speed of a refrigerant is increased, and oil in the compressor 1 is flushed and refluxed into the compressor 1 in time.

Further, the capillary tube net system is in a heating working condition, when the capillary tube net system is subjected to defrosting operation, the operating frequency f of the compressor 1 is more than or equal to 15Hz and less than or equal to 60Hz, the compressor 1 continuously operates for 5 hours at the frequency of 15Hz-60Hz, the time interval between the compressor 1 and the previous defrosting operation is more than or equal to a second time threshold value, and the compressor 1 is controlled to increase the operating frequency.

Specifically, the second time threshold is 40-120 min.

More specifically, in the present embodiment, when the time interval from the previous defrosting operation is equal to 120min, the compressor 1 is controlled to increase the operation frequency.

Presetting a third frequency threshold f3 of the compressor 1, enabling the capillary network system to be in a refrigerating working condition or a heating working condition, and controlling the compressor 1 to increase the operating frequency when f2 is more than or equal to f3 and the time T2 that the compressor 1 operates at the operating frequency f reaches the third time threshold. By presetting a third frequency threshold f3 and a third time threshold of the compressor 1, when the frequency f of the compressor 1 in the capillary network system is f2 < f ≤ f3, and the time T2 that the compressor 1 operates at the operating frequency f reaches the third time threshold, the operating frequency of the compressor 1 is increased, oil of the compressor 1 attached to the inner wall of the capillary network can be quickly washed away and is brought back into the compressor 1 along with a refrigerant, so that the problem that the oil of the compressor 1 is difficult to return due to the fact that the oil of the compressor 1 is easily attached to the inner wall of the capillary network 2 is solved, the phenomenon that the cylinder body of the compressor 1 is abraded due to the fact that the oil of the compressor 1 is excessively attached to the inner wall of the capillary network 2 is prevented, and the service life of the compressor 1 is further.

Further, in this embodiment, when the operating frequency f of the compressor 1 is greater than 60Hz and less than or equal to 80Hz, and the compressor 1 continuously operates for 3 hours at the frequency of 60Hz to 80Hz, the capillary network system controls the compressor 1 to increase the operating frequency, increase the flow rate of the refrigerant, and flush and flow the oil in the compressor 1 back into the compressor 1 in time.

Further, a fourth time threshold value is preset, the capillary tube network system is in a heating working condition, when the capillary tube network system does not perform defrosting operation, the time T2 that the compressor 1 operates at the operating frequency f reaches the third time threshold value, and the compressor 1 is controlled to increase the operating frequency; when the capillary network system is subjected to defrosting operation and the time interval between the capillary network system and the previous defrosting operation is greater than or equal to a fourth time threshold value, controlling the compressor 1 to increase the running frequency. By respectively arranging two types of control compressors 1 to improve the adjustment of the operating frequency in the heating condition for judging whether the defrosting operation is performed or not, the smooth oil return of the capillary network system under the heating condition is fully ensured.

Further, when the capillary network system does not perform defrosting operation, when the operating frequency f of the compressor 1 is more than 60Hz and less than or equal to 80Hz, and the compressor 1 continuously operates for 3 hours at the frequency of 60Hz-80Hz, the capillary network system controls the compressor 1 to increase the operating frequency. When the capillary tube network system is subjected to defrosting operation, when the operating frequency f of the compressor 1 is more than 60Hz and less than or equal to 80Hz, the compressor 1 continuously operates for 3 hours at the frequency of 60Hz-80Hz, and the time interval between the compressor 1 and the previous defrosting operation is more than or equal to a fourth time threshold value, and the compressor 1 is controlled to increase the operating frequency.

Specifically, the fourth time threshold is 40-120 min.

More specifically, in the embodiment, when the compressor 1 is operated at the frequency of 60Hz to 80Hz and the time interval between the operation of defrosting and the previous defrosting operation is equal to 120min, the compressor 1 is controlled to increase the operation frequency.

And presetting a fifth time threshold, wherein the capillary tube network system is in a refrigerating working condition or a heating working condition, and when f is not less than f1 and not more than f3 and the sum of T1 and T2 reaches the fifth time threshold, controlling the compressor 1 to increase the operating frequency. By presetting the fifth time threshold, wherein f is not less than f1 and not more than f3, and the sum of T1 and T2 reaches the fifth time threshold, the operation frequency of the compressor 1 is controlled to be increased, so that the oil return of the compressor 1 in the operation within the frequency range of 15Hz-80Hz is effectively ensured.

Specifically, the capillary tube network system is in a refrigerating working condition or a heating working condition, and when f is more than or equal to 15Hz and less than or equal to 80Hz and the sum of T1 and T2 reaches a fifth time threshold, the compressor 1 is controlled to increase the operating frequency.

Further, the fifth time threshold is not less than 6 hours, in this embodiment, when the sum of T1 and T2 reaches 6 hours, the compressor 1 is controlled to increase the operating frequency.

The oil return method for the capillary network system provided by the embodiment of the invention can ensure that the oil of the compressor 1 can flow back into the compressor 1 from the capillary network 2, prevent the phenomenon of abrasion of the cylinder body of the compressor 1 caused by the excessive adhesion of the oil of the compressor 1 on the inner wall of the capillary network 2, and further ensure the service life of the compressor 1.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.