公开(公告)号：US10605492B2

公开(公告)日：2020-03-31

申请号：US15511544

申请日：2015-06-16

Applicant: Guangdong Meizhi Compressor Co., Ltd.

Inventor： Masao Ozu ,  Weimin Xiang ,  Jijiang Yu ,  Hong Guo ,  Cheng Zhang ,  Ziqiang Liang ,  Ling Wang ,  Liang Zhong ,  Lili Yan

IPC: F25B1/10 ,  F25B5/00 ,  F25B41/06 ,  F25B31/02 ,  F25B43/02 ,  F25B31/00 ,  F25B1/047 ,  F25B41/04

Abstract: 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.

公开(公告)号：US10451067B2

公开(公告)日：2019-10-22

申请号：US15101911

申请日：2013-12-05

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Xingbiao Zhou ,  Yongjun Fu ,  Liyu Zheng ,  Cheng Zhang ,  Hong Guo

IPC: F04C18/356 ,  F04C23/00 ,  F04C29/12 ,  F04C18/344 ,  F04C29/00 ,  F25B13/00 ,  F25B31/02 ,  F04C18/32

Abstract: A compression device includes an air cylinder (31); an upper bearing (4) and a lower bearing (5); a piston (71) which defines a working space; a first slide vane (81) and a second slide vane (82) which separate the working space into a first and a second working chamber; a first air suction port (101) and a second air suction port (102) both of which are in communication with the working space; and a first air discharge port (91) and a second air discharge port (92) both of which are in communication with the working space. The first and the second air suction port satisfy the following condition: 0.25≤(V1/S1)*(S2/V2)≤4, where VI and V2 are respectively the maximum volume of the first and the second working chamber, and S1 and S2 are respectively the opening area of the first and the second air suction port.

公开(公告)号：US09909587B2

公开(公告)日：2018-03-06

申请号：US14394324

申请日：2013-09-30

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Guoyong Yang ,  Weimin Xiang ,  Jijiang Yu ,  Hong Guo ,  Jingtao Yang ,  Cheng Zhang

IPC: F04C29/12 ,  F04C18/356 ,  F04C23/00

CPC classification number: F04C29/124 ,  F04C18/3564 ,  F04C18/3568 ,  F04C23/001 ,  F04C23/008 ,  F04C29/128 ,  F04C2250/101

Abstract: 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%.

公开(公告)号：US20170130717A1

公开(公告)日：2017-05-11

申请号：US15315981

申请日：2015-02-02

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Masao Ozu ,  Jijiang Yu ,  Cheng Zhang ,  Hong Guo ,  Xingbiao Zhou ,  Liang Zhong ,  Lili Yan ,  Ling Wang

IPC: F04C18/356 ,  F04C29/00 ,  F25B31/02 ,  F04C23/02

CPC classification number: F04C18/356 ,  F04C2/356 ,  F04C11/008 ,  F04C15/0042 ,  F04C18/3564 ,  F04C23/008 ,  F04C23/02 ,  F04C29/0021 ,  F04C29/005 ,  F04C29/023 ,  F04C2270/125 ,  F25B31/026 ,  F25B2500/06 ,  F25B2500/12 ,  F25B2500/13 ,  F25B2500/26 ,  F25B2500/27

Abstract: 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.

公开(公告)号：US10458410B2

公开(公告)日：2019-10-29

申请号：US15318942

申请日：2014-12-04

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Bin Gao ,  Jijiang Yu ,  Hong Guo

IPC: F04C29/02 ,  F01C21/08 ,  F04C18/356 ,  F04C23/00 ,  F04C29/12

Abstract: 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 V2 and a minimum volume V1. 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 V1 to the maximum volume V2 satisfies the following relationship: 35%≤V1/V2≤85%.

公开(公告)号：US10072661B2

公开(公告)日：2018-09-11

申请号：US14773880

申请日：2013-10-31

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Masao Ozu ,  Weimin Xiang ,  Jijiang Yu ,  Hong Guo ,  Jingtao Yang ,  Cheng Zhang ,  Bin Gao ,  Ling Wang

IPC: F04C29/12 ,  F04C15/00 ,  F04C29/06 ,  F04C29/02 ,  F04C23/00 ,  F04C18/356

CPC classification number: F04C29/12 ,  F04C15/0092 ,  F04C18/356 ,  F04C23/001 ,  F04C23/008 ,  F04C29/02 ,  F04C29/068

Abstract: 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.

公开(公告)号：US20170138360A1

公开(公告)日：2017-05-18

申请号：US15318942

申请日：2014-12-04

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Bin Gao ,  Jijiang Yu ,  Hong Guo

IPC: F04C29/02 ,  F04C29/12 ,  F04C18/356

CPC classification number: F04C29/026 ,  F01C21/0845 ,  F01C21/0863 ,  F01C21/0872 ,  F04C18/3562 ,  F04C18/3564 ,  F04C23/001 ,  F04C23/008 ,  F04C29/02 ,  F04C29/12 ,  F04C2210/22 ,  F04C2240/30 ,  F04C2240/50

Abstract: 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 V2 and a minimum volume V1. 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 V1 to the maximum volume V2 satisfies the following relationship: 35%≦V1/V2≦85%.

公开(公告)号：US10254013B2

公开(公告)日：2019-04-09

申请号：US15121244

申请日：2014-03-03

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Weimin Xiang ,  Yongjun Fu ,  Liyu Zheng ,  Hong Guo

IPC: F25B1/02 ,  F04C23/00 ,  F04C28/06 ,  F04B25/00 ,  F04C18/356

Abstract: A refrigeration cycle device and a two-stage rotary compressor thereof. The two-stage rotary compressor includes a housing with a gas injection chamber and two cylinders disposed therein; the gas injection chamber connected to a liquid reservoir disposed outside of the housing and a gas injection pipe; a first cylinder in communication with the gas injection chamber; a second cylinder connected to the liquid reservoir, and having a sliding vane groove and a compression chamber with a piston disposed therein in communication with the gas injection chamber; a sliding vane, received in the sliding vane groove when the gas injection chamber is in communication with the liquid reservoir, with an outer end and the sliding vane groove defining a backpressure chamber in communication with the gas injection chamber; and with an inner end abutting against the piston when the gas injection chamber is in communication with the gas injection pipe.

公开(公告)号：US09577561B2

公开(公告)日：2017-02-21

申请号：US14758469

申请日：2014-07-01

Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.

Inventor： Siqing Liao ,  Xinjie Ren ,  Wanjie Song ,  Weimin Xiang ,  Jijiang Yu ,  Cheng Zhang ,  Hong Guo ,  Jingtao Yang

IPC: H02P23/04 ,  H02P21/05 ,  H02P25/02

CPC classification number: H02P23/04 ,  H02P21/05 ,  H02P25/022 ,  H02P25/024

Abstract: A method for suppressing a speed fluctuation of a permanent magnet synchronous motor is provided in the present disclosure, including: obtaining a target speed ω_ref, a feedback speed, a fluctuation speed Δω, a q-axis inductance Lq and a permanent magnet flux linkage φf of the permanent magnet synchronous motor; performing a PI adjusting on Δω to obtain a q-axis reference current Iq_ref, and obtaining a q-axis target voltage U*q according to Iq_ref, ω_ref, Δω and φf; performing a PI control on a q-axis actual voltage according to U*q to obtain a q-axis compensation current Iq_add; obtaining a d-axis target voltage U*d according to Iq_ref, Iq_add, ω_ref, Δω and Lq; performing a PI control on a d-axis actual voltage according to U*d to obtain a d-axis compensation current Id_add; superposing Iq_add and Iq_ref to perform a feedforward compensation on a q-axis current and superposing Id_add and the d-axis reference current to perform a feedforward compensation on a d-axis current.

Abstract translation: 本发明公开了一种用于抑制永磁同步电机的速度波动的方法，包括：获得目标速度ω_ref，反馈速度，变动速度Δω，q轴电感Lq和永磁体磁链φf 的永磁同步电机; 对Δω执行PI调整，得到q轴基准电流Iq_ref，根据Iq_ref，ω_ref，Δω，φf得到q轴目标电压U * q; 根据U * q对q轴实际电压进行PI控制，得到q轴补偿电流Iq_add; 根据Iq_ref，Iq_add，ω_ref，Δω和Lq获得d轴目标电压U * d; 根据U * d对d轴实际电压执行PI控制以获得d轴补偿电流Id_add; 叠加Iq_add和Iq_ref以对q轴电流执行前馈补偿，并叠加Id_add和d轴参考电流，以对d轴电流执行前馈补偿。