Oil return control method of refrigerating and freezing unit and refrigerating and freezing unit
A technology of oil return control and refrigerating units, which is applied in the direction of refrigerators, refrigeration components, compressors, etc., and can solve problems such as inability to return oil smoothly
Active Publication Date: 2021-09-24
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +2
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Problems solved by technology
[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the technical problem that the compressor in the prior art cannot return oil smoothly when the compressor is frequently started and stopped, the present invention provides Oil return control method for a refrigerating and freezing unit
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[0037] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0038] In order to solve the technical problem in the prior art that oil cannot be returned smoothly when the compressor is frequently started and stopped, the present invention provides an oil return control method for a refrigerating and freezing unit. The oil return control method includes:
[0039] Detect the real-time operating frequency and the corresponding cumulative operating time of the compressor of the refrigerating and freezing unit (step S1);
[0040] Based on the real-time operating frequency and the corresponding cumulative operating time, it is judged whether the compressor meets the oil return control condition (step S2);
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The invention relates to an oil return control method of a refrigerating and freezing unit and the refrigerating and freezing unit using the oil return control method. The oil return control method comprises the following steps: detecting the real-time operation frequency and the corresponding accumulated operation duration of a compressor of the refrigerating and freezing unit; based on the real-time operation frequency and the corresponding accumulated operation duration, judging whether the compressor meets oil return control conditions or not; and when the oil return control condition is met, under the condition that the number of restarting times of the compressor reaches the preset number of times, starting an oil return mode to control restarting of the compressor. According to the oil return control method of the refrigerating and freezing unit, the compressor can be controlled to be restarted in the oil return mode under the condition that the restarting frequency of the compressor reaches the preset frequency, and smooth oil return under the condition that the compressor is frequently started and stopped is achieved.
Description
technical field [0001] The invention relates to the technical field of refrigeration, in particular to an oil return control method of a refrigerating and freezing unit and the refrigerating and freezing unit. Background technique [0002] In the process of modern industrial and agricultural production, refrigerating and freezing units can provide effective temperature control, thereby promoting the continuous improvement of production efficiency and product quality. Therefore, they are widely used in many fields such as food processing, machinery manufacturing, pharmaceutical production, and grain storage. Refrigeration-freezing units, including but not limited to water-cooled units and air-cooled units, can directly use refrigerant (also called "refrigerant") to cool cold storage and other occasions in order to provide suitable refrigeration and / or freezing temperatures. Some refrigerated freezers use a vapor compression refrigeration cycle, for example using a screw compr...
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IPC IPC(8): F25B31/00F25B49/02F25B41/31
CPCF25B31/002F25B49/022F25B41/31
Inventor 孟庆良宋强赵俊东刘江彬
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD