摘要:
A castor includes a wheel support and at least one roller mounted on the wheel support. The at least one roller has a peripheral portion provided with a hollow air chamber which is provided with a plurality of hollow air columns. One of the hollow air columns is provided with an air inlet. The at least one roller is made of soft material that is made by a blow molding operation. The soft material is initially made into a tubular blank by a blow molding machine. A gas is then filled into the soft material to blow and shape the soft material in a die at a high temperature to form the at least one roller. The at least one roller is then stripped from the die.
摘要:
A fan assembly including a housing, a supporting member, a driving device and a passive impeller. The supporting member is disposed in the housing, and the driving device is disposed on the supporting member. The passive impeller includes a first hub and a plurality of first passive blades encircling the first hub. The active impeller includes a second hub and a plurality of active blades encircling the second hub and actuated to rotate by the driving device. In an axial direction, the first hub is disposed between the driving device and the second hub, and through rotation of the active impeller, airflow is produced which actuates the passive impeller to rotate.
摘要:
A fan includes a frame and an impeller. The frame includes a main body, a plurality of guiding elements and a motor base. The main body has an airflow inlet and an airflow outlet. The guiding elements are disposed in the main body and located at the airflow outlet, wherein each of the guiding elements includes an inclined part and an axial extended part, and the inclined par meets the axial extended part at an angle. The motor base connects to the main body. The impeller is disposed on the motor base for providing an airflow, wherein the guiding elements guide the airflow away from the fan.
摘要:
A semiconductor device comprises a substrate and quantum dots, wherein a peak emission of the quantum dots has a FWHM of less than 20 meV when the semiconductor is measured at a temperature of 4 Kelvin.
摘要:
A recirculation fan includes a casing, a covering member, and a fan assembly. The casing has a base. The covering member is coupled with the casing to define an accommodation space. The fan assembly is disposed within the accommodation space, and includes a first impeller, a second impeller, a motor, and a plurality of magnetic elements. The second impeller is located beside the first impeller. The motor is fixed on the base of the casing and connected with the first impeller for driving rotation of the first impeller. The magnetic elements are arranged between the first impeller and the second impeller. A wind force generated by the first impeller and a magnetic torque resulted from a magnetic vortex of the magnetic elements cause contactless rotation of the second impeller.
摘要:
A method of using a light detection system for increasing the accuracy of a precision airdrop is described. Radiation is transmitted to target areas between an airborne vehicle and a dropzone target. Scattered radiation is received from the target areas. Respective wind characteristics are determined from the scattered radiation and a wind velocity map is generated, based on the respective wind characteristics, between the airborne vehicle, and at least the dropzone target. An aerial release point for the precision airdrop is computed based on the generated wind velocity map and a location of the dropzone target.
摘要:
A connection structure for a shaft and a bearing includes a shaft and at least one bearing. The bearing has a shaft hole for the shaft to insert therein, a first face and a second face opposite to the first face. An outer circumference of the shaft is welded with a circumference of the shaft hole in adjacency to the first face of the bearing to form at least one first welding section connected between contact sections of the outer circumference of the shaft and the circumference of the shaft hole in adjacency to the first face. Via the first welding section, the shaft is integrally connected with the bearing. Therefore, the shaft and the bearing are more securely fixed with each other and the manufacturing cost is lowered.
摘要:
A current collection apparatus and its method of processing for a solid oxide fuel cell, which mainly includes using screen printing process to print conductive adhesive onto the surface of the electrode of solid oxide fuel cell (SOFC), forming a current collection layer with drying process, using an appropriate amount of conductive adhesive to paste a conductive wire onto the current collection layer, forming an adhesion layer through drying, fixing the conductive wire on the electrode surface with an appropriate amount of ceramic adhesive, and forming a fixing layer after baking. A good connection is hence made between metal conductive wire and electrode through current collection layer, not only the interface impedance between electrode and current collection layer can be reduced effectively, but also the output power density of the SOFC unit cell can be enhanced, and stable as well as long term power output can be provided.
摘要:
A fan assembly includes an active fan, a supporting base and a passive element. The active fan includes a first impeller and a motor. The passive element is driven to rotate by an airflow from the active fan. The passive element includes a impeller and at least one load. The load is connected to the impeller.
摘要:
A ventilation device includes a passage unit (100), a wind turbine (200) and a fan (300). The wind turbine (200) is provided above the passage unit (100), and the fan (300) is provided within the wind turbine (200). The rotation of the wind turbine (200) drives the fan (300) to rotate, so that the air within the passage (100) is exhausted by the fan.