Oil return control method of air conditioner, oil return control device and air conditioner
A technology for oil return control and air conditioners, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of small pressure difference between high and low pressure of compressors, lack of compressors, and damage to lubricating oil, so as to improve the high and low pressure. Differential pressure, the effect of improving reliability
Active Publication Date: 2019-03-08
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
Due to the frequent startup and shutdown of the outdoor unit, the outdoor unit cannot continue to operate stably, which will cause the pressure difference between the high and low pressure of the compressor to be small, and the lubricating oil cannot return to the compressor in time after being discharged from the compressor, which will cause the compressor Damaged due to lack of lubricating oil inside
[0004] Therefore, how to avoid the frequent startup and shutdown of the outdoor unit and cause the compressor to be damaged due to lack of lubricating oil, and to ensure the reliable operation of the compressor and the stability of the system has become a technical problem to be solved urgently.
Method used
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[0039] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0040] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0041] The technical solution of the present invention is mainly to control the oil return of the air conditioner. Specifically, during the working process, the compressor in the air conditioner disc...
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The invention provides an oil return control method and an oil return control device for an air conditioner and the air conditioner. The oil return control method comprises the steps that the number of times of halt of a compressor for achieving the condition that the air conditioner adjusts the indoor environment temperature to the set temperature in the preset duration is counted; and if it is counted that the number of times of halt of the compressor reaches the set number of times in the preset duration, when the air conditioner adjusts the indoor environment temperature to the set temperature again, the compressor is controlled to operate at the preset frequency, and a throttling part arranged on a refrigerant pipeline in the air conditioner is controlled to be opened by a preset open degree so as to conduct oil return control on the air conditioner. Through the technical scheme, the effect that lubricating oil discharged into the refrigerant pipeline by the compressor can return to the compressor smoothly in time can be ensured, thus the effect that enough lubricating oil exists in the compressor for lubrication is ensured, and the reliability of the compressor and the system stability are improved.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to an oil return control method for an air conditioner, an oil return control device for an air conditioner, and an air conditioner. Background technique [0002] The multi-connected air conditioning system is a refrigeration system composed of one or more outdoor units connected in parallel and connected to two or more indoor units through piping. It is mainly used in office buildings, apartment hotels, schools, villas, and hospitals. and other places. [0003] In a multi-connected air conditioning system, it often happens that only one or a few indoor units are used for a long time. When the room load design is too large and the room insulation effect is good, the indoor unit can easily adjust the temperature in the room to When the temperature is set, the outdoor unit temporarily enters the shutdown state; after a period of time, the indoor temperature changes, the outd...
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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/02F25B2500/16
Inventor 董文涛许永锋梁伯启薛晓
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD