131results about How to "Does not impede flow" patented technology

The invention discloses an efficient heat exchange tube. The efficient heat exchange tube comprises a gas collecting tube and a liquid collecting tube. A plurality of heat exchange tube units are communicated between the gas collecting tube and the liquid collecting tube. Each heat exchange tube unit comprises a first heat exchange tube, a second heat exchange tube and a corner elbow. The inlets of the first heat exchange tubes are communicated with the gas collecting tube. The outlets of the second heat exchange tubes are communicated with the liquid collecting tube. The second heat exchange tubes are vertically layered and arranged in a staggered mode relative to the first heat exchange tubes. The corner elbows are arranged between the first heat exchange tubes and the second heat exchange tubes. The outlets of the first heat exchange tubes are communicated with the inlets of the second heat exchange tubes. The efficient heat exchange tube solves the problems that in the prior art, the heat exchange tubes of an evaporative condenser are low in inner side heat exchange coefficient and large in outer side wind resistance, and is good in heat conduction performance and small in tube diameter; the evaporative condenser is good in heat transfer performance, high in pressure resistance, compact in structure and small in occupied space.

The invention provides a manufacturing method of a centrifugal compressor and an impeller. On the side of the negative pressure surface of the vane (16) of the impeller (11), a convex portion (17) is formed in a curved line from the front edge portion (A) to the slit portion (B) at approximately the central portion in the radial direction, and the convex portion ( 17) By forming it so as to form a curve from the slit portion (B) to the rear edge portion, it will be formed at the position where the relative inflow velocity of the fluid flowing to the impeller (11) reaches the Mach number Ma≒1 The convex part (17) can improve the operation efficiency and expand the adaptable flow range, and further realize the improvement of performance.

A heat exchanger includes a heat transfer tube functioning as a flow path for refrigerant and also includes metal fins. The metal fins transmit heat of the heat transfer tube to air and have pores that are open inward from the surfaces of the metal fins and absorb and release moisture in the air when relative pressure is in the range of 0.1 - 0.9. The pores have a diameter in the range of 1 - 20 nm and a depth in the range of 1 - 100 mu m.

A rotor (30) comprises a rotor core (31) having electromagnetic steel sheets laminated, six permanent magnets (32) buried axially in the rotor core (31) and arranged substantially in a regular hexagon shape in the circumferential direction, rivets (33) arranged near and radially inside of the apexes of the regular hexagon formed of the six permanent magnets (32), and extending therethrough in the axial direction to fasten the rotor core (31), and through holes (34) formed between the rivets (33) of the rotor core (31) and extending axially through the rotor core (31). The through holes (34) are formed in the rotor core (31) radially inside of the central portions of the permanent magnets (32).

The invention relates to a battery (8), consisting of a plurality of individual cells (1), the reciprocal housing plates (2.1, 2.2) of which, preferably conducting heat well, are positioned at a distance from each other at least in sections so as to form fluid-permeable flow-through channels (9). According to the invention, a fluid flow guiding unit (7) is disposed on at least one side of the edge (5.1) of an individual cell housing (2) in an individual cell (1).

The invention discloses a method for measurement of two-phase flow gas holdup based on an ultrasonic two-frequency signal. The method comprises the steps of: arranging an ultrasonic transmitting probe and an ultrasonic receiving probe respectively at both ends of a section of straight pipeline needing two-phase flow gas holdup measurement; by means of the ultrasonic transmitting probe, generating two ultrasonic signals that are propagated along the fluid in the straight pipeline and have the excitation frequencies of a first excitation frequency and a second excitation frequency respectively; detecting the characteristic parameters of the received two ultrasonic signals by the ultrasonic receiving probe; and calculating the gas holdup according to the first excitation frequency, the second excitation frequency, the pure liquid propagation velocity, the resonant frequency of bubbles in the two-phase flow, the bubble vibration damping and the characteristic parameters of the two ultrasonic signals. The ultrasonic probes are installed on the outer wall of the straight pipeline, and are not needed to be arranged in the two-phase flow in the pipeline, thus realizing non-contact measurement of the two-phase flow gas holdup. The data processing amount is very small, and flow of the two-phase flow in the pipeline is not hindered in the measurement process.

The invention discloses a noise-reducing and rain-proof drainage hood. The noise-reducing and rain-proof drainage hood comprises a cylinder body. The cylinder body comprises an upper cone cylinder anda lower cone cylinder. Each of the cylinder walls of the upper cone cylinder and the lower cone cylinder comprises an inner cylinder wall body, an outer cylinder wall body and a silencing layer. An open lower cone cap is mounted in the cylinder body. A water guide pipe is connected to the lower end of the lower cone cap. The water guide pipe inclines downwardly, penetrates the cylinder wall of the lower cone cylinder and extends out of the cylinder body. According to the noise-reducing and rain-proof drainage hood, noise enters from an air inlet, the noise is absorbed by a punching slicing plate of the lower cone cylinder and the silencing layer, then rebounded to a punching slicing plate of the upper cone cylinder and the silencing layer and then transmitted out through an air outlet; inthe process, the noise is subjected to multiple times of rebounding, slicing and noise reduction, the noise can be lowered to 50-60 dB, the slicing and noise reduction effects are ideal and meet andexceed the national emission standards, and the noise-reducing and rain-proof drainage hood has the function of eliminating the radiated noise of an air outlet of a chimney; and besides, the hood meets the requirements on ventilation and prevention of invasion of sand and dust blown by wind, rainwater and snow water and has the beneficial effects of being small in size, low in weight, easy and convenient to mount, low in cost and the like.

The electric fan concurrently being used as heater comprises rear protective net fitted on the motor shell and the shaft hub at the front of the motor, motor shaft through the through-hole formed on the shaft hub and projected from the front of the motor, rotary blade detachable fixed on the motor shaft, the front protective net detachable fixed at the front edge of the rear protective net, multiple division reflection boards which is supported ratatablly freely on the periphery direction of the shaft hub, and has a connection heater and power supply socket.

The invention provides an ionic wind radiating device, which is characterized by comprising a power supply and a radiating net formed by mutually intersecting a first group of conductive wires comprising two or more than two conductive wires and a second group of conductive wires comprising two or more than two conductive wires, wherein the first group of conductive wires are electrically connected to one output end of the power supply; the second group of conductive wires are electrically connected to another output end of the power supply; in addition, at the position of each intersection, the first group of conductive wires have bumps which face the same direction and are vertical to the plane of the radiating net so as to stride over the corresponding second group of conductive wires which are intersected with the first group of conductive wires, and the first and the second groups of conductive wires are mutually insulated.

The invention relates to a centrifugal compressor wheel (10) that comprises a hub (12), a web (14) radially extending from the hub and supporting a plurality of blades (16). The invention is characterized in that the web includes a wheel erosion indicator (18).

A centrifugal compressor and a method of manufacturing an impeller, the method wherein a projected part (17) is formed at the approximately radial center part of the impeller (11) on the negative pressure surface side of its a blade (16) so as to form a curve from the leading edge part (A) to the throat part (B) thereof. The projected part (17) is formed to be curved and then to be flat from the throat part (B) to the trailing edge part thereof. The projected part (17) is formed at a position where the relative inflow velocity of the fluid into the impeller (11) is nearly 1 in Mach number Ma. Thus, since an operating efficiency can be increased and an applicable flow range can be increased, the performance of the impeller can be increased.

A fuel filling device for a vehicle fuel tank has a fuel filling opening (15a) in an upper wall (3a) of a vehicle fuel tank (3) for containing ethanol fuel as engine fuel, and also has a fuel filling guide tube (15) extending from the fuel filling opening (15a) into the fuel tank (3) and receiving a fuel filling gun (G). A fuel filling guide tube (15) has a flame arrester (21) for covering a lower opening of the fuel filling guide tube (15) and permitting flow of fuel while preventing entry of fire, and also has a gun stopper (20) for preventing the fuel filling gun (G) inserted into the fuel filling guide tube (15) from making contact with the flame arrester (21). Without the use of a long fuel filling guide tube, the flame arrester can be protected against damage by the fuel filling gun inserted into the fuel filling opening.

An air conditioner according to the invention comprises the following components: a body which is formed with an air suction inlet; a discharge outlet body which is installed on the body with a liftable mode and is formed with an air discharge outlet; a plurality of left-and-right wind direction adjusting components which are rotatablely installed on the inner side of discharge outlet body; a left-and-right rotation mechanism which rotates the plurality of left-and-right wind direction adjusting components; and a supporting member which is formed with a plurality of supporting feet that support the left-and-right wind direction adjusting components and is formed with a path for the passing of air among the plurality of supporting feet. The left-and-right wind direction adjusting components are positioned at the deep part of inner part of discharge outlet body and can prolong the guiding length. Therefore the air conditioner according to the invention has the advantage that the discharged air can be discharged and diffused to a far position and the air flow is smooth.