A rotating electric machine comprises a stator and a rotor. In the rotor, numerous slots are formed along a circumferential direction. In the each of slots, a first stator coil and a second stator coil are inserted and insulated by an insulator inserted before inserting the coils in the slots. The insulator encircles the first and second stator coils so as to be formed into an S shape. The center portion thereof extends over the area between the first and second stator coils. One end of the insulator is held between one surface of the center portion of the insulator and the first stator coil. Other end of the insulator is held between another surface of the center portion of the insulator and the second stator coil.

Rotating electric machine

The invention discloses a permanent magnet type air pump, relates to low-pressure air compression equipment and belongs to a double-cylinder or double-membrane single-phase alternating-current full wave air pump. Driving power of the permanent magnet type air pump is produced through combined action of a magnetic field of a permanent magnet and an electromagnetic field. The two sides of a driving shaft 6 of the permanent magnet type air pump are provided with two permanent magnets 10 correspondingly, the middle of the driving shaft 6 is provided with a coil 4 and a hollow iron core 5 which are fixed to a pump body 3, and the driving shaft 6 can freely move in the hollow iron core 5 in the axial direction. When the coil 4 is connected to a single-phase alternating-current power source, an alternating magnetic pole is produced on the side, facing the permanent magnet, of the iron core 5, and the sides, facing the iron core 5, of magnetic poles of the two magnets on the driving shaft are the same in polarity (N pole or S pole). Due to the fact that the driving shaft 6 does straight reciprocating motion under the effect of attraction and repulsion of the electromagnetic field and the permanent magnet field, two pistons or membranes are driven to achieve air pump suction and compression stroke. Due to the fact that only attraction of the electromagnetic field is used as driving force of the electromagnetic type air pump, the permanent magnet type air pump has the good energy saving effect.

Permanent magnet type air pump

The invention discloses a compressor and refrigeration equipment and belongs to the technical field of compressors The compressor comprises a compressor body The compressor body is internally provided with a cylinder, a piston mechanism arranged in the cylinder and an oil storage part The oil storage part is used for storing lubricating fluid The inner wall of the cylinder is provided with anoil storage groove An elastic deformation oil suction valve plate is arranged in the first oil storage groove The compressor body is further provided with an oil suction pipe The oil suction end ofthe oil suction pipe communicates with the oil storage part The oil discharge end of the oil suction pipe communicates with the first oil storage groove The oil suction pipe is controlled to communicate or be blocked through elastic deformation of the oil suction valve plate According to the compressor provided by the invention, the inner wall of the cylinder is provided with the oil storage groove and the oil suction pipe communicating with the oil storage groove so that the compressor can automatically extract the lubricating fluid to lubricate the piston mechanism through negative pressure generated by reciprocating motion of the compressor during operation and can automatically implement automatic oil supply operation without an extra oil pump device, the internal structure of thecompressor is simplified, and the operation stability of the compressor is improved

Compressor and refrigeration equipment

The invention discloses a compressor and a refrigerating device and belongs to the technical field of compressors. The compressor comprises a compressor body. An air cylinder, a piston mechanism arranged in the air cylinder and an oil storage part are arranged in the compressor body. The piston mechanism comprises a piston head and a piston rod. The oil storage part is used for storing lubricatingfluid. A first oil storage groove is formed in the outer wall of the piston rod. The compressor body is further provided with an oil suction pipeline. The oil suction end of the oil suction pipelinecommunicates with the oil storage part. The oil discharging end of the oil suction pipeline communicates with the inner wall of the air cylinder. When the piston mechanism conducts reciprocating compression motion in the axial direction of the air cylinder, the oil discharging end of the oil suction pipeline and the first oil storage groove can be switched between a communication state and a separation state. By means of the compressor, due to the oil storage groove of the piston mechanism and the oil suction pipeline communicating with the oil storage groove, the compressor can utilize negative pressure generated during the reciprocating motion of the compressor to automatically extract the lubricating liquid to lubricate the piston mechanism during running, the internal structure of thecompressor is simplified, and running stability of the compressor is improved.

Compressor and refrigerating device

The invention provides an oil pump assembly and a linear compressor comprising the same. The oil pump assembly comprises a cylinder body with an inner cavity, a piston and an elastic reset piece, wherein the piston is movably arranged in the inner cavity and divides the inner cavity into a first cavity body and a second cavity body; the cylinder body is provided with an oil inlet hole and an oil outlet hole which both communicate with the first cavity body; the elastic reset piece is arranged between the cylinder body and the piston; the elastic reset piece is arranged in the first cavity body, and the second cavity body is an empty cavity; or the elastic reset piece is arranged in the second cavity body, and the first cavity body is an empty cavity. According to the technical scheme, the problems that an oil pump of a linear compressor is complex in assembly process and high in cost in the prior art are solved.

Oil pump assembly and linear compressor comprising same

The utility model discloses a lubricating oil supply device for a linear compressor. The lubricating oil supply device for the linear compressor comprises a pump body fixed to the linear compressor. A first through hole is formed in the center of the pump body. An oil inlet and an oil discharge outlet are formed in the two ends of the pump body respectively, the oil inlet is connected with a first valve base, a second through hole communicated with the oil inlet is formed in the center of the first valve base, a sealing device which can block the oil inlet but can move in an inner cavity of the first through hole is arranged in the inner cavity of the first through hole, and a stopping device for limiting the sealing device is connected to the portion, close to the oil discharge outlet, of the inner cavity of the first through hole. The lubricating oil supply device for the linear compressor is simple in structure, easy to machine, low in cost, good in oil pumping effect, small in power consumption and high in reliability.

Lubricating oil supply device for linear compressor

The invention provides an inner stator for a linear compressor motor. The inner stator comprises stator blocks which are orderly arranged around an axial circumference and are set in a divergent way. The combined gap between adjacent stator blocks is provided with a stator filling block made of magnetic material. The stator filling block is far from the outer side of a motor shaft and is assembled at the outer circumference of the stator. The invention also provides for a motor for a linear compressor and the linear compressor. Through improving the structure of the inner stator in the linear compressor, the combined gap formed at the inner stator outer circumference is used, a small stator block is inserted into a combined gap formed by large stator blocks, thus the magnetic loss caused by the gap in the inner stator, and the efficiency of the motor is improved.

Inner stator for linear compressor motor, corresponding motor and linear compressor

The invention discloses a linear compressor and a piston thereof. The piston comprises a piston head and a piston rod, wherein the piston head and the piston rod are fixedly connected through a bolt and a nut. According to the piston of the linear compressor, the threaded end of a threaded rod is fastened with the nut to prevent the piston from being damaged, so that the assembly reject ratio is reduced, and the performance of the compressor is improved.

Linear compressor and piston thereof

The invention provides a method for monitoring the temperature of a coil of a linear compressor, which includes the following steps: 1, powering on and starting the linear compressor, applying a bus voltage V to the linear compressor, acquiring a current value I of the coil, and calculating the initial resistance R of the coil according to the Ohm's law; 2, operating the linearcompressor in a normal mode, reapplying the bus voltage V after the linear compressor operates for a set time t, reacquiring the current value I , and calculating the resistance R of the coil according to the Ohm's law; 3, calculating a coil resistance change value [delta]R = R -R ; 4, calculating a coil temperature rise [delta]T according to the formula (RT/T) = ([delta]R/[delta]T); and 5, cooling the coil if [delta]T exceeds a set temperature rise value. The method requires no additional protection device to reduce manufacturing cost, and reduces the overall volume to improve a space utilization rate.

Method for monitoring temperature of coil of linear compressor

The invention provides an oil supply mechanism of a linear compressor The linear compressor is provided with a shell A motor body and the oil supply mechanism used for supplying oil to the motor body are contained in the shell The oil supply mechanism comprises an oil cylinder and an oil piston arranged in the oil cylinder The oil cylinder is fixed to the motor body and connected with the motor body through an oil supply pipe The oil piston is fixed to the shell The oil cylinder and the motor body are arranged in linkage The oil cylinder moves relative to the oil piston with the assistance of motion of the motor body, so that the oil supply mechanism supplies the oil through the oil supply pipe It can be guaranteed that the oil cylinder moves relative to the oil piston, motion is reliable, and therefore the oil supply effect is guaranteed

Li Hengguo

Papers

Lubricating oil supply device for linear compressor

Inner stator for linear compressor motor, corresponding motor and linear compressor

Linear compressor and piston thereof

Method for monitoring temperature of coil of linear compressor

Oil supply mechanism of linear compressor