78results about How to "Reduce spoilers" patented technology

A cooling module is presented, which includes a heat sink and a fan unit. The heat sink provides a base plate and a plurality of fins, with an outlet extending through the base plate and the fins formed on a first surface of the base plate, and with a second surface of the base plate attached to a heat generating unit. The fan unit is rotatably mounted on the heat sink and aligned with the outlet. With the above-mentioned structure, an air-guiding channel is formed between any adjacent two of the fins and communicates with the outlet for a part of air outputted by the fan unit to be guided through the air guiding channels and exhausted by the outlet. Consequently, disturbed flows and wind noise are decreased while cooling efficiency is improved.

The invention discloses a middle-bent axial flow fan blade, which comprises a hub and a blade. The blade comprises an outer periphery, a front edge and a rear edge. The middle-bent axial flow fan blade is characterized in that: the blade is in a wave shape that at least one continuous wave crest and wave trough are arranged in the radial direction from the front edge to the rear edge. Due to the adoption of the structure, high pressure transferred to the outer periphery is dispersed and prevented. The middle-bent axial flow fan blade can reduce the vortex and turbulence caused by radial flow, thereby improving the air flowing environment, improving the static pressure and the efficiency, and reducing the noise. The middle-bent axial flow fan blade can solve the common deformation problem existing in fan blade molding in the mold production, thereby reducing the manufacturing cost.

The invention provides an active respirator for children which comprises a respirator main body, wherein the respirator main body is a housing respirator main body; the outer side of the housing respirator main body is convex; a concave cavity is formed on the inner side of the housing respirator main body; the housing respirator main body comprises a front cover, a middle cover, a rear cover and a sealing ring, which are connected in sequence through snap fasteners; the sealing ring is contacted with a face; air inlet holes are formed at the joint of the front cover and the middle cover; air outlet holes are formed in the upper part of the middle cover; a filter unit is arranged on the middle cover and corresponds to the front cover; a cavity structure is arranged between the middle cover and the rear cover; a fan is arranged on the rear cover and corresponds to the filter unit of the middle cover; and an air outlet non-return valve, a battery connected with the fan, a control circuit board and a starting switch are arranged at the upper part of the rear cover. The active respirator is used for protecting children, is suitable for children to use in a hazy environment or other polluted environments, has a good protection effect and strong active air-suction power, is simpler and more convenient to manufacture, disassemble, assemble and clean, ensures a short and smooth air inlet passage, and meanwhile can avoid stimulation to lungs caused by the reason that air enters the lungs in case of high wind pressure.

The invention provides a bionic underwater glider with undulatory fins. The bionic underwater glider comprises a pressure-resistant outer cylinder, a head end cover and a tail end cover, a flow inletsection and a flow outlet section are installed on the head end cover and the tail end cover correspondingly, and a pair of undulatory fin devices is mounted on the two opposite sides of the tail portion of the pressure-resistant outer cylinder. The undulatory fin devices create sinusoidal waves so as to generate propulsion for a machine body, and when the motion direction, the amplitude and/or the frequency of the sinusoidal waves is changed, the propulsion produced by the undulatory fins is also changed so as to control the machine body to move. The bionic underwater glider with the undulatory fins solves the technical problem that a traditional underwater glider is in lack of a power source and effective communication means, so that the mobility and stability under water are poor.

The invention discloses an intensified heat exchange tube provided with a spiral grooved tube with a spiral fin inserted inside. The intensified heat exchange tube comprises a reserved unthreaded tube, a spiral finned tube and the spiral grooved tube which are connected sequentially. The spiral finned tube is composed of the unthreaded tube and the spiral fin welded into the unthreaded tube, the width of the fin is 0.3-0.4 times the inner diameter of the unthreaded tube, and the total length of the fin is equal to the screw pitch length of 1-2 fin spiral lines. The spiral fin enables turbulent flow of the spiral groove tube section to be greatly enhanced, and reduces flowing resistance. When the spiral fin is matched with the spiral grooved tube, the heat exchange coefficient is higher than that of the spiral grooved tube by 3% to 10%, and the flowing resistance is reduced by 16% to 30%. The tube section with the fin inserted inside of the heat exchange tube with the spiral fin inserted inside is independently machined, small in length, convenient to wash and small in material consumption, saves space, can be matched with various tube sections of different types and has quite important engineering application value to further development of the intensified heat exchange tube.

The invention discloses an ultrasonic wave opposite irradiation type water meter. The ultrasonic wave opposite irradiation type water meter is structurally characterized in that two opposite irradiation type energy converters are installed inside a water meter body, a measurement tube is connected between the two opposite irradiation type energy converters, and the two opposite irradiation type energy converters are completely attached to the tube wall of the measurement tube. The front ultrasonic wave energy converter and the back ultrasonic wave energy converter are connected with an ultrasonic wave timing module through signal lines, the connection lines are the same in length, the ultrasonic wave timing module is connected with a single chip microcomputer, and the single chip microcomputer is connected with a liquid crystal display module. The ultrasonic wave opposite irradiation type water meter has the advantages that two opposite irradiation type energy converters perform direct opposite irradiation measurement, so paths for sound wave transmission are shortened, losses for sound wave transmission are reduced, 100% sound wave opposite irradiation can be achieved, and measurement is more accurate and product quality is more stable accordingly; streamline type appearance is adopted in the opposite irradiation type energy converters, the opposite irradiation type energy converters can be completely attached to a tube section of a basic meter, so water resistance is reduced, turbulent flow is quite small, and through measurement tube rectification, measurement errors are small.

The invention discloses a different-propeller multi-axis aircraft structure and an operation method. The aircraft structure comprises two types of propellers and has two types of corresponding power rotating speeds. The specific principle of the different-propeller multi-axis aircraft structure is as follows: two symmetric powers located on a spray nozzle are high-speed powers, and the propellers matched with the powers are small propellers with the higher pitch and smaller size. Low-speed power and large propellers with small pitch and large size are adopted for other axes. The aircraft structure has the advantages that the high-speed power rotating speed of the small propellers matched with high-speed powers is higher than that of the large propellers matched with low-speed powers under the same condition, and the airflow speed produced by the high-speed powers is obviously higher than that produced by low-speed powers. The distances between the propellers with the reduced size and other propellers are enlarged, mutual turbulence is reduced, downward movement of fog drops is facilitated, fog drops sprayed by the spray nozzle below the high-speed powers is blown downwards under the drive of high-speed airflow, so that better penetrating power is obtained.

The invention relates to an FFU four-air-duct box structure, which comprises a FFU box, one side of the top of the inner cavity of the FFU box body is connected with a universal fixing plate; the universal fixing plate is arranged to be of a rectangular settling tank structure. A controller is mounted in the universal fixing plate; the center of the top of the FFU box body is connected with an airinlet mesh enclosure structure which comprises a protective cover in sealed connection with the FFU box body; a mounting through groove is formed in the top of the protective cover; the inner side ofthe mounting through groove is connected with an air inlet mesh enclosure; an air inlet is formed under the air inlet mesh enclosure. The structure is simple, stable and reliable, convenient to install and use, capable of enhancing the structural strength of the box body, pressure-resistant and durable. Four air channels can be formed by adopting the structural form of the four downwind guide plates, internal turbulent flow points are reduced, airflow in the box body is smoother and more uniform. Meanwhile, the box body structure is simplified, assembling is convenient, the working efficiencyis improved, energy consumption is reduced, and cost is saved.