60results about How to "Small flow cross section" patented technology

A vacuum pump for supplying a machine assembly with a negative pressure includes a housing and a housing cover surrounding a delivery chamber. The delivery chamber includes a low-pressure region having a working inlet connected to the assembly, and a high-pressure region having a working outlet. A delivery member moveable within the delivery chamber, which, when moved, suctions air into the delivery chamber through the working inlet and expel it at an increased pressure through the working outlet. An outlet valve is arranged at or downstream or the working outlet and at least makes it difficult for air to flow back into the delivery chamber. The delivery chamber is connected to the external environment of the vacuum pump via a ventilating connection in order to establish at least partial pressure equalization with the external environment when the delivery member is stopped and a negative pressure prevails in the delivery chamber.

The invention relates to a device for quickly detecting flow property parameters of an air passage of a cylinder cover of an internal combustion engine, which is characterized in that a testing air passage is arranged above a cylinder sleeve, and the center of the cylinder sleeve is coaxial with the center of a momentum meter; the lower end of the momentum meter is connected with a pressure stabilizing barrel which is provided with two channels, wherein one channel is sequentially connected with an electrical ball valve, a pressure stabilizing box, a flow meter and a draught fan, and the otherchannel of the pressure stabilizing barrel is sequentially connected with a second electrical ball valve and a first air filter; the exhaust end of the testing air passage is connected with an air flow carding machine, a third electrical ball valve is arranged above the pressure stabilizing box and is communicated with the air flow carding machine through a flexible tube, and the air exhaust sideof the draught fan is connected with a second air filter; and the rotating speed of the draught fan is controlled by a frequency converter. The testing process of the whole test only needs 3-5 minutes. The invention has the characteristics of reducing the cost of the testing equipment and reducing the test noise on the basis of improving the testing precision, and can be used for instantly detecting cylinder covers of engines in production lines.

An intake arrangement (1) for a two-stroke engine includes an intake channel (2) in which a throttle flap (3) is pivotally journalled with a throttle shaft (4). Downstream of the throttle flap (3), a partition wall (8) is mounted on the intake channel (2) and this partition wall partitions the intake channel (2) into an air channel (6) and a mixture channel (7). In the idle position (5) of the throttle flap (3), at least one fuel opening (14) opens into the mixture channel (7) downstream of the throttle flap (3). A connecting opening (16) between the air channel (6) and the mixture channel (7) is provided between the partition wall (8) and the throttle shaft (4) in the idle position (5) of the throttle flap (3). A shield (20, 30) is mounted in the mixture channel (7) between the fuel opening (14) and the connecting opening (16) in order to achieve a good swing performance of the two-stroke engine. The shield reduces the passing of fuel into the air channel and therefore the degree of wetting of the air channel with fuel.

The invention provides a vertical air conditioner indoor unit. The vertical air conditioner indoor unit comprises a shell, an air duct, a flow guide part and an air inducing channel; the shell is provided with an air supply opening, a first air inlet and a second air inlet; the inner wall, close to an air outlet, of the air duct is in a gradually-shrinking shape with a flow cross section graduallybecoming smaller in the airflow direction; the flow guide part is arranged in the air duct, an annular air outlet gap is defined by the flow guide part and a gradually-reduced part of the air duct, and the flow guide part is used for guiding airflow to the annular air outlet gap so that the airflow can be gradually gathered towards the center of the airflow under the guidance of the inner wall ofthe air duct and flow out of the air outlet and the air supply opening; and the air inducing channel is formed between the shell and the air duct and is provided with an inlet end communicated with the second air inlet and an outlet end communicated with the air supply opening, and indoor air enters the shell through the second air inlet and is guided to the air supply opening through the air inducing channel. The vertical air conditioner indoor unit is stronger in wind power and farther in air supply distance.

The invention provides a water distribution and collection device which comprises a water distributor, a water collector and a supporting structure, wherein a water-collection main pipe of the water collector is provided with a plurality of water-collection joints and flow regulating valves which are in one-to-one correspondence with the water collection joints; the flow regulating valves comprise regulating valve cores and regulating caps above the regulating valve cores; the regulating valve cores comprise valve core screw caps fixedly arranged on the water-collection main pipe and regulating bases fixedly arranged above the valve core screw caps; the outer walls of the regulating bases are provided with external thread parts spacing bosses which has certain distance with the upper parts of the external thread parts; the inner walls of the regulating caps are provided with internal thread parts and spacing clamping platforms above the internal thread parts; the regulating caps are upward rotated until the internal thread parts are separated from the external thread parts, the spacing clamp platforms can not continuously move upward as being clamped by the spacing bosses, so that the internal thread parts of the regulating caps can rotate freely at smooth intervals between the external thread parts and spacing bosses of the regulating bases, so that the condition that the regulating caps and the regulating bases are locked can be prevented, the reliability of the water distribution and collection device is improved, and the operation comfort of a user is enhanced.

A sampling ash-ejector of fly ash is prepared as setting top and bottom, left and right and front and back through holes on ash ejecting seat; connecting top hole to quarts detection tube and bottom hole to inverse blowing nozzle and compressed air inlet; setting ash ejecting nozzle and according tube on top player left and right through holes as ash ejection according tube being connected to air locker, ash ejecting nozzle head, ash ejecting tube, etc; setting a sampling nozzle and sampling acceleration tube on bottom layer front and back through hole as sampling nozzle one end being connected to compressed air inlet and another end to sampling separator.

The invention provides a wall-mounted air conditioning indoor unit. The wall-mounted air conditioning indoor unit comprises a casing and a flow guide part, wherein an elongated first air supply outlet extending transversely is formed in the front side of the casing, an air duct connected with the first air supply outlet is formed in the casing, the distance between the upper wall and the lower wall of the air duct is gradually decreased in the airflow direction at the position close to the first air supply outlet, so as to form a gradually-shrinking section; the flow guide part is in a rod shape parallel to the length direction of the first air supply outlet, is arranged in the air duct, defines air outlet gaps with the upper wall and the lower wall of the flow guide part, and is used for guiding airflow blown to the first air supply outlet to the upper wall and the lower wall of the air duct, so that the airflow gradually gathers towards the airflow center to flow out of the first air supply outlet under the guidance of the gradually-shrinking section of the air duct; and an airflow channel penetrating through the front surface and the rear surface of the flow guide part front and back is formed in the flow guide part, so as to lead part of airflow in the casing to the front side of the flow guide part. The wall-mounted air conditioning indoor unit has better long-distance air supply and powerful air supply effects.

The invention provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell, wherein a plurality of first air supply ports are defined inthe front portion of the machine shell, an air duct communicating with the plurality of first air supply ports is defined in the machine shell, and the inner wall, close to the first air supply ports,of the air duct is in a gradually-reduced shape enabling the overflowing section of the air duct to be gradually reduced in the airflow direction; and a plurality of flow guide parts, wherein each flow guide part corresponds to one first air supply port and is arranged in the air duct, and an air outlet gap is defined between each flow guide part and the inner wall of the air duct, so that airflow blown to the corresponding first air supply port is guided to the inner wall of the air duct, and the airflow gradually flows out of the first air supply port towards an airflow center in a gatheredmanner under the guidance of the gradually-reduced portion on the inner wall of the air duct. Each flow guide part is configured to move in the front-back direction so as to be close to or away fromthe corresponding first air supply port, so that the size of the air outlet gap is adjustable. The wall-mounted air conditioner indoor unit has better long-distance air supply and strong air supply effects.

A reformer (10) for a fuel cell has a chamber (26) including a chamber inlet (20) for the input of a reactant gas mixture and a chamber outlet (24) for the output of a reformed gas, a catalytic active medium being arranged in the chamber. The reformer (10) has a heat pipe (12) with an outer cylindrical pipe wall (14) and an inner cylindrical wall (16), the chamber (26) being disposed between the outer pipe wall (14) and the inner wall (16). Advantageously, the heat pipe has a passage with a helical shapes.

Disclosed is a device for reducing flow noise. In order to achieve a low flow noise, the device includes inlet apertures for receiving a fluid flow, chambers into which one or more inlet apertures open up, a cross-sectional area of a single chamber being larger than a combined flow cross-sectional area of the inlet apertures opening up thereto, and chamber-specific outlet apertures for forwarding the fluid flow from the chamber, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of the chamber, and the combined flow cross-sectional area of all outlet apertures of the single chamber being larger than the combined flow cross-sectional area of the inlet apertures opening up into said chamber.

The invention provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell, wherein first air supply ports and an air duct connected withthe first air supply ports are defined in the machine shell, and the inner wall, close to the first air supply ports, of the air duct is in a gradually-reduced shape enabling the overflowing sectionof the air duct to be gradually reduced in the airflow direction; and flow guide parts, wherein the flow guide parts are arranged in the air duct, and air outlet gaps are defined between the flow guide parts and the inner wall of the air duct so as to guide air supply airflow blown to the first air supply ports to the inner wall of the air duct and enable the air supply airflow to gradually flow out of the first air supply ports towards an airflow center in a gathered manner under guidance of the gradually-reduced portion on the inner wall of the air duct. Each flow guide part is of a hollow structure, air outlets are formed in the sides, facing the first air supply ports, of the flow guide parts, and the flow guide parts are configured to introduce or produce adjusting airflow; and in theflowing process of the air supply airflow, a negative-pressure environment is formed at the air outlets, so that the adjusting airflow is promoted to be mixed into the air supply airflow and blown out of the first air supply ports together. The wall-mounted air conditioner indoor unit has better long-distance air supply and strong air supply effects.

The invention relates to a residence kitchen toilet exhausting channel structure, and discloses a guide changing exhausting channel. The guide changing exhausting channel comprises an exhausting channel (1) and fireproofing back-pressure valves (2), wherein the exhausting channel (1) is internally provided with bottom-free guide pipes (3), and air outlets of the fireproofing back-pressure valves (2) are formed in the bottom-free guide pipes (3). The guide changing exhausting channel provided by the invention has the advantages that the bottom-free guide pipes are arranged on the guide changing exhausting channel, when the valve pieces of the fireproofing back-pressure valves of a starting floor are blew out so as to lean on bottom-free inverted trapezoidal guide pipes, the bottom-free guide pipes are changed with the guide pipe with the bottom, the flow area of the position smoke is effectively reduced, the smoke from the lower part floor can rise along the periphery of the guide pipe, a Venturi effect is generated, the interior static pressure of an air inlet is reduced, and the guide changing exhausting channel is beneficial for smoke discharge of the starting layer.

The invention provides a wall-mounted air-conditioner indoor unit, which comprises a housing and a flow guide element, wherein a first air supply opening and an air duct connected with the first air supply opening are defined in the housing; the inner wall, close to the first air supply opening, of the air duct is in a convergent shape that a flow passing section is gradually diminished in an airflow direction; and the flow guide element is arranged in the air duct, and further, air outlet gaps are defined between the flow guide element and inner wall of the air duct to guide an airflow blownto the first air supply opening to the inner wall of the air duct, so that the airflow gradually flows, in an aggregation manner, out of the first air supply opening towards the center of the airflowunder the guidance of convergent parts of the inner wall of the air duct. The wall-mounted air-conditioner indoor unit provided in the invention has better long-distance air supply and strong air supply effects.

A drain valve for installation in a floor has a generally tubular housing having an open upper end and an open lower end and laterally closed side walls therebetween. A bottom plate closing the lower housing end is formed with a throughgoing lower hole and is formed around the lower hole with an upwardly directed lower valve seat. A top plate closing the upper housing end is formed with a throughgoing upper hole and is formed around the respective hole with a downwardly directed upper valve seat. A floatable valve body in the housing between the plates is movable between an upper position fitted in and blocking the upper seat and clear of the lower seat and a lower position fitted in the lower seat and clear of the upper seat. Thus, flow only is possible through the housing in an intermediate position of the ball clear of both of the seats.

The invention relates to a pump turbine system, comprising a turbine with a turbine impeller as well as a turbine spiral housing and a turbine suction pipe; a pump with a pump impeller as well as a pump spiral housing and a pump suction pipe; the two spiral housings are arranged to run in opposite directions; a shaft on which the turbine impeller and the pump impeller are non-rotatably arranged; an electrical machine that is in drive communication with the shaft or can be brought into such communication; the pressure lines of the two spiral housings open into a common pressure line; both suction pipes are each connected to suction lines, with both suction lines opening into a common suction line; with a separate shut-off element each being arranged in the suction lines.

The invention relates to a suction hose fitting (10) for connection to the suction hose of a high-pressure cleaning device, having a housing (12) which has an inlet opening (34) and an outlet opening (104), wherein a filter device (28) is arranged at the inlet opening (34) and a connection device (44, 48) for the suction hose is arranged at the outlet opening (104), and wherein a non-return valve, which closes in the direction of the inlet opening (34) and has a valve body (90) which can be moved to and fro between a closed position and an open position in the housing (12), is arranged in the housing (12). In order to develop the suction hose fitting in such a way that cleaning of the filter device (28) can be simplified, it is proposed according to the invention that the non-return valve can be manually released.

A number of devices are provided for detecting presence of ice in an airstream. In some examples such device includes a housing defining a first chamber and a second chamber, and a partition wall separating the first chamber and the second chamber. The first chamber has at least one inlet opening on a front housing wall facing the airstream, and at least one outlet opening, smaller than the at least one inlet opening. The second chamber is configured for being operatively coupled to at least one electromagnetic (EM) system that is configured for transmitting EM energy to the first chamber at least via the partition wall, which is transparent and/or translucent with respect to the EM energy, the EM energy being configured for melting ice that can accrete with respect to the inlet opening. The device is configured for being operatively coupled to at least one air pressure sensor in fluid communication with the first chamber for detecting at least pressure changes in the first chamber responsive to ice accretion on the inlet opening.

The invention relates to a pilot-controlled valve arrangement having at least one valve mechanism mounted in a valve housing (1) for multi-stage switching of a compressed air flow between a feed pressure connection (2) and a working line connection (3), wherein a throttled compressed air flow can be switched in at least one switching stage by means of a throttle, wherein the pneumatic pilot control comprises a first control piston (8) mounted in a first control chamber (9) implemented in the valve housing (1) and comprising a coaxial recess for forming a second control chamber (10) in which a second control piston (11) is mounted, so that an additive control pressure application to the control chambers (9, 10) generates a telescope-like deployment of a ram (6) extending from the second control piston (11) for generating a multi-stage switching stroke for the valve mechanism, in order to implement the throttled compressed air flow in at least one switching stage of the valve mechanism present between the closed and the open valve setting.

A device for filling containers, includes a storage container in which a fluid that is to be bottled in the containers can be accommodated, a filling device which fills the fluid into the containers, and a transport line for transporting the fluid from the storage container to the filling device. A valve device is arranged in the transport line between the storage container and the filling device, which valve device automatically switches between an open and a closed state depending on a flow rate of the fluid within the transport line.