4results about How to "Prevent flow through" patented technology

The application discloses a kind of tangential magnetization rotor integrated shaftless impeller's magnetic suspension artificial heart pump structure, including impeller and several equidistantly connected independent blades of equal size and material in rotor inside, the blade is located in rotor center, but not connected on main shaft, realize the integration of impeller and rotor and the shaftless of impeller, improve traditional central shaft driven impeller to four peripheral driving type.Blade equidistantly connects in rotor shield sleeve inside, realizes shaftless, to be integrated with rotor in one body.The application adopts above-mentioned tangential magnetization rotor integrated shaftless impeller's magnetic suspension artificial heart pump structure and can reduce motor volume, easy to transplant;Meanwhile, the integrated structure can prevent blood from flowing through motor air gap to the maximum, to reduce the situation of hemolysis and thrombosis.

A waterproof induction cooker, comprising a metal housing with a lower opening and a metal bottom plate. The metal housing includes a through hole provided on the top plate, an air outlet hole group provided on the rear back plate, and a waterproof eaves plate provided at the top of the rear end; an air inlet hole group is provided on the metal bottom plate, and the metal bottom plate is buckled and fixed with the lower opening of the metal housing. With the arrangement of the water guiding eaves plate, the water falling on the top of the metal housing is discharged through the water guiding eaves plate, preventing the water from flowing through the rear back plate, thereby preventing the water from entering the housing through the air outlet hole group, thus achieving waterproofing.

The invention discloses a heat pump air conditioning system which comprises a compressor and a heat pump, the four-way reversing valve is connected with the compressor and is configured to change the flow direction of a refrigerant; the indoor heat exchanger is connected with the four-way reversing valve; the outdoor heat exchanger is connected with the four-way reversing valve; the refrigerant storer is configured to store a refrigerant flowing through the refrigerant storer; the first pipeline is configured to connect the outdoor heat exchanger and the indoor heat exchanger; the branch pipeline is configured to be connected with the refrigerant storage and the first pipeline to form a refrigerant flow path; the adjustable on-off device is arranged on the first pipeline, and the adjustable on-off device is configured to adjust the flow of the refrigerant flowing through the refrigerant storage so as to adjust the refrigerant circulation amount in the air conditioning system. According to the air conditioning system, dynamic adjustment of the refrigerant circulation amount can be achieved, so that the requirements of the air conditioning system for the refrigerant amount under different working conditions are met.

The application discloses a variable-volume supercritical extraction device and a use method. The extraction kettle comprises a top cover, a kettle body, a top filter cover, an extrusion device and a pushing device. The kettle body is open at both upper and lower ends, the upper end of the kettle body is in sealing connection with the top cover, and the lower end is in sealing connection with the extrusion device. A temperature control layer is arranged outside the kettle body, and a kettle cavity is formed inside the kettle body. The top filter cover is in sealing connection with the kettle body. An inlet pipeline is arranged at the bottom of the kettle body. An upper gas outlet pipeline is arranged at the upper end of the side wall of the kettle body. The upper gas outlet pipeline is in communication with the inner cavity of the top filter cover. The extrusion device comprises a thrusting circular table, a push rod and a filter plate. The thrusting circular table is movably arranged in the kettle cavity, the push rod is connected with the thrusting circular table, and the filter plate is arranged on the thrusting circular table. The upper end of the inlet pipeline is arranged between the thrusting circular table and the filter plate. The extrusion device is connected with the pushing device. The application has the advantages of simple structure, convenient operation, no need of an inner material cylinder, convenient loading and unloading, saving of manpower and material resources, and wide application in the field of supercritical extraction.