3results about How to "Controllable weight" patented technology

The invention provides a circular tube type underwater acoustic transducer thermal control structure based on a thermal convection mechanism. The circular tube type underwater acoustic transducer thermal control structure comprises a piezoelectric ceramic circular tube, a heat conduction structural body, an upper cover plate hard decoupling material, a lower cover plate hard decoupling material, a heat conduction upper cover plate, a heat conduction lower cover plate and a transducer watertight layer, a positive electrode lead and a negative electrode lead are respectively led out from the piezoelectric ceramic circular tube, a heat dissipation coating is arranged on the inner cylindrical surface of the piezoelectric ceramic circular tube, and a transducer watertight layer is coated on the outer cylindrical surface of the piezoelectric ceramic circular tube; and a heat absorption coating is arranged on the outer cylindrical surface of the heat conduction structural body. According to the invention, heat generated by the piezoelectric ceramic circular tube is conducted to the heat conduction structural body and then is transferred to a water environment through the heat conduction upper cover plate and the heat conduction lower cover plate, so that thermal control of the circular tube type underwater acoustic transducer is realized based on a heat convection mechanism, the heat dissipation capability of the circular tube type underwater acoustic transducer is improved, and the service life of the circular tube type underwater acoustic transducer is prolonged. The long-time and high-power working capacity of the transducer is improved, and the weight and volume loads generated by the transducer are controllable.

The application discloses a heat pump air conditioning system, comprising a driving module, the driving module comprising a driving circuit and a heat-conducting substrate, wherein the driving circuit is used for driving a motor in the heat pump air conditioning system, and the heat-conducting substrate is used for conducting and dissipating heat generated by the driving circuit to the surrounding environment; further comprising a heating module and a heat dissipation module, wherein the heating module is arranged close to the heat-conducting substrate or in the heat-conducting substrate; when the heating module is in a heating state, the heating module is used for raising the temperature of the heat-conducting substrate, and the heat dissipation module is arranged close to the heating module, and the heat dissipation module comprises a heat dissipation pipeline, and the heat dissipation pipeline is used for guiding refrigerant flow to dissipate heat for the driving module. The heat pump air conditioning system provided by the application forms a reasonable heat transfer path by arranging the heat dissipation module close to the heating module and arranging the heating module close to the heat-conducting substrate; on one hand, the heating module does not affect normal heat dissipation, and on the other hand, the heating module can be used for raising the temperature of the heat-conducting substrate to inhibit condensation of the driving module, and the heating power can be greatly reduced.

The utility model relates to antenna equipment technical field especially is involved in a kind of multi-frequency multi-port base station antenna with combined road, it includes main reflection bottom plate, four groups high frequency array and low frequency array in four groups high frequency array are misaligned and are arranged.Low frequency array is provided with multiple low frequency radiating units.Multiple high frequency phase shift feed modules that are electrically connected with high frequency radiating unit, multiple low frequency phase shift feed modules that are electrically connected with low frequency radiating unit and multi-frequency combiner are provided on the back of main reflection bottom plate.Multiple columns of high frequency array and a group of low frequency array are simultaneously provided on main reflection bottom plate, and low frequency radiating array is ingeniously inserted between high frequency radiating array, compact structure and lightweight design, and multi-band function is realized by integrated design, while keeping antenna volume and weight controllable.