Freezing circulation device and its control method
A technology of a circulation device and a control method, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of reducing the working efficiency of the motor part, reducing the performance, and increasing the flow resistance.
Inactive Publication Date: 2006-06-07
TAIZHOU LG ELECTRONICS REFRIGERATOR CO LTD
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Problems solved by technology
[0011] However, in the existing refrigerating cycle device, when the frequency conversion compressor is operated at a low frequency, the flow resistance of the refrigerant when passing through the oil separator will increase, resulting in performance degradation caused by flow resistance. At the same time, the frequency conversion compressor If there is too much engine oil in the middle return, the motor part of the above-mentioned inverter compressor is soaked in engine oil, thereby reducing the working efficiency of the motor part
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[0033] like Figure 1 to Figure 2 As shown, the refrigerating cycle device in the present invention is provided with an inverter compressor (2), and the above-mentioned inverter compressor (2) changes the compression capacity of the refrigerant according to the input frequency. The refrigerant is discharged at the same time.
[0034] The inverter compressor (2) is a device for compressing low-temperature and low-pressure gas refrigerant to convert it into high-temperature and high-pressure gas refrigerant. It includes: a motor part whose driving speed is determined according to the input frequency output from an inverter (6) connected to a common power supply (4); and a compression part whose compression chamber is compressed by the driving of the motor part.
[0035] A discharge pipe (3a) for discharging refrigerant and oil is connected to one side of the inverter compressor (2), and a suction pipe (3b) for sucking refrigerant and oil is connected to the other side.
[0036...
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The present invention provides freezing circulation device and its control method. The freezing circulation device includes a frequency variable compressor with refrigerant compressing capacity changing with the input frequency and the simultaneous exhaust of compressed refrigerant and machine oil; a refrigerant condensator; a refrigerant expander; a refrigerant evaporator; an oil returning unit connecting the machine oil separator and the sucking pipe fitting of the frequency variable compressor; and a flow path changing unit to make the refrigerant and machine oil the frequency variable compressor exhausts flow to the machine oil separator or to shunt the refrigerator pipe fitting. The control method includes the following steps: comparing the input frequency to the frequency variable compressor and the set frequency; making the refrigerant and machine oil the frequency variable compressor exhausts flow to the machine oil separator in greater input frequency; and or else not to the machine oil separator.
Description
technical field [0001] The invention relates to a refrigeration cycle device and a control method thereof. Background technique [0002] In general, a refrigeration cycle device is installed in an air conditioner or a refrigerator, and exchanges heat with a refrigerant indoors or in a freezer / refrigerator to keep it at a low temperature. Recently, a variable inverter compressor that changes the compression capacity of the refrigerant according to the input frequency is mainly used. [0003] The refrigeration cycle device includes: an inverter compressor that compresses a low-temperature and low-pressure gas refrigerant; an oil separator connected to a discharge pipe of the inverter compressor; and returning the oil separated from the refrigerant in the oil separator to the inverter compressor. The oil return pipe of the suction pipe of the engine; the condenser for condensing the refrigerant passing through the above-mentioned oil separator; the expander for expanding the r...
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IPC IPC(8): F25B31/00F25B49/02
CPCY02B30/70
Inventor 崔永燮柳润镐金哲民宋灿豪李元熙赵殷晙崔昶民车宇镐张志永玄升烨
Owner TAIZHOU LG ELECTRONICS REFRIGERATOR CO LTD