Guangdong Meizhi Compressor Co., Ltd.

Jijiang Yu

Hong Guo

Cheng Zhang

Weimin Xiang

Masao Ozu

Ling Wang

Jingtao Yang

Bin Gao

Liang Zhong

Lili Yan

Xingbiao Zhou

Guoyong Yang

Wanjie Song

Xinjie Ren

Siqing Liao

Ziqiang Liang

Guanfeng Luo

An electric compressor and a refrigeration device having the same are provided. The electric compressor includes: an electric motor having a stator and a rotor; a compressing mechanism having an eccentric shaft rotatably and slidably connected to the rotor and defining a compressing chamber therein, the compressing chamber being configured to perform a compression by the eccentric shaft; and a torque damping device configured to connect the rotor with the eccentric shaft, in which during the compression of the compressing chamber, a difference between a rotation angle of the eccentric shaft and a rotation angle of the rotor is a phase angle which is increased and decreased.

Electric compressor and refrigeration device having same

A refrigeration cycle device includes at least a condenser, an expansion valve, an evaporator and a plurality of compressors, a sealed casing of each of the compressors is disposed with a rotary compression mechanism part in communication with a low-pressure path and a motor part configured to drive the compression mechanism part, the low-pressure path is in communication with the evaporator, each of the compressors is further provided with an oil storage cavity, and a gas discharge path of at least one compressor is connected with the sealed casing of another compressor.

Refrigeration cycle device

A low-backpressure rotary compressor includes a shell, a compression mechanism, an oil separator for separating oil and gas from a refrigerant discharged from the cylinder, and an oil pool for collecting a lubricating oil separated by the oil separator. The compression mechanism includes a cylinder assembly, a piston, a sliding vane, main and supplementary bearings. The cylinder has a sliding vane chamber which has an oil supply hole, and a trailing end of the sliding vane stretches into or out of the sliding vane chamber when the sliding vane moves reciprocatingly, such that an interior volume of the sliding vane chamber changes between a maximum volume Vand a minimum volume V. The oil pool communicates with the oil supply hole via an oil supply path for the sliding vane, and a ratio of the minimum volume Vto the maximum volume Vsatisfies the following relationship: 35%&#x2264;V/V&#x2264;85%.

Low-backpressure rotary compressor

A rotatory compressor and a refrigerating cycle device are provided. The rotatory compressor includes a lubricating oil in an interior of a hermetically sealed housing, and an electric motor and a rotatory compressing mechanism disposed in the housing. An internal pressure of the housing is substantially equal to a suction pressure of the compressing mechanism. The compressing mechanism includes a first bearing and a second bearing at least one of which includes an exhaust muffler. A refrigerant of the exhaust muffler flows through the sliding vane chamber and is discharged from an exhaust pipe of the compressing mechanism.

Rotatory compressor and refrigerating cycle device

A refrigerant filling rotary compressor includes a shell, a compressing mechanism, an injection tube and an injection valve assembly. The compressing mechanism includes a cylinder, a main bearing, an auxiliary bearing, a crank shaft, a piston and a sliding vane. An inner wall of the cylinder chamber of the cylinder is formed with a filling mouth, and the cylinder is provided with a filling channel with a filling hole. The injection valve assembly is in a closed state when a pressure inside the cylinder chamber is higher than that in the filling hole so as to separate the filling hole from the filling mouth, and the injection valve assembly is in an open state when the pressure inside the cylinder chamber is lower than that in the filling hole so as to communicate the filling hole with the filling mouth, in which when the injection valve assembly is in the closed state, a space between the injection valve assembly and the filling mouth where a compressed gas exists is termed a clearance volume formed by the injection valve assembly, and a ratio between the clearance volume formed by the injection valve assembly and a reserve volume of the cylinder ranges from 0.3% to 1.5%.

Refrigerant filling rotary compressor

A method for suppressing a speed fluctuation of a permanent magnet synchronous motor is provided in the present disclosure, including: obtaining a target speed &#x3c9;_, a feedback speed, a fluctuation speed &#x394;&#x3c9;, a q-axis inductance Land a permanent magnet flux linkage &#x3c6;of the permanent magnet synchronous motor; performing a PI adjusting on &#x394;&#x3c9; to obtain a q-axis reference current I, and obtaining a q-axis target voltage U*according to I, &#x3c9;_, &#x394;&#x3c9; and &#x3c6;; performing a PI control on a q-axis actual voltage according to U*to obtain a q-axis compensation current I; obtaining a d-axis target voltage U*according to I, I, &#x3c9;_, &#x394;&#x3c9; and L; performing a PI control on a d-axis actual voltage according to U*to obtain a d-axis compensation current I; superposing Iand Ito perform a feedforward compensation on a q-axis current and superposing Iand the d-axis reference current to perform a feedforward compensation on a d-axis current.

Method for suppressing a speed fluctuation, a control apparatus and a compressor control system

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Foshan, China

Jijiang Yu