Abstract: A scroll compressor includes fixed and orbiting scrolls. The fixed scroll includes a fixed scroll end plate and a spiral fixed wrap extending from the end plate. The orbiting scroll includes an orbiting scroll end plate and an orbiting wrap extending from the end plate and engaging with the fixed wrap to form compression chambers. The fixed wrap includes a first fixed wrap portion on a radially outer side and a second fixed wrap portion on a radially inner side. The first fixed wrap portion is periodically covered by the orbiting scroll end plate and the second fixed wrap portion is always covered by the orbiting scroll end plate while the scroll compressor is operating. A sealing member is provided on one of the first fixed wrap portion and a first covering portion of the orbiting scroll end plate corresponding to the first fixed wrap portion.

Abstract: A compressor includes a rotor configured to compress air and driven by a shaft. A motor is drives the shaft. A thrust bearing facilitates rotation of the shaft. The thrust bearing includes a thrust shaft and a thrust plate. The thrust shaft includes first and second orifices. A bearing cooling air inlet is in fluid communication with the first and second orifices.

Abstract: A hydraulic pressure supply unit has a storage chamber which stores hydraulic fluid, a hydraulic pump which is arranged within the storage chamber and dips at least partially into the stored hydraulic fluid, and an electric motor which drives the hydraulic pump. The electric motor is arranged below the hydraulic pump in a separate motor chamber which is situated below the storage chamber, is dry, and is not connected fluidically to the storage chamber. The electric motor is coupled in a thermally transmitting manner to a separating floor, the upper side of which delimits the storage chamber and is wetted continuously with stored hydraulic fluid.

Abstract: A pump assembly is presented including a motor housing holding an electric motor and a wet-end housing. The pump assembly also includes a heat transfer interface positioned between a front end of the motor housing and the wet-end housing. The heat transfer interface establishes a thermal conduction path between the motor housing and the wet-end housing so that, in use, a portion of heat generated by the motor is absorbed by the heat transfer interface and is dissipated in water circulating through the wet-end housing. In addition, or alternatively, another thermal conduction path may be established between the heat transfer interface and an electronic controller of the pump assembly so that heat generated by the controller is absorbed by the heat transfer interface and dissipated in water circulating through the wet-end housing.

Abstract: The application discloses a hand-held fan, including a main housing. The main housing includes a cylindrical holding part and a semi-cylindrical mounting part. The hand-held fan also includes a set of protection covers provided at the mounting part. The protection cover is also provided with a connecting part rotatably connected to the mounting part. An outer side of the mounting part is opened and provided with an annular slot, the connecting part is provided with a plurality of catch platforms clamped and connected to the annular slots, two limit grooves are symmetrically provided in the annular slot along a rotating axial direction of the fan blade, and the inner side of the connecting part is provided with two limit bosses clamped and connected to the two limit grooves. This application solves the problem that an existing small hand-held fan cannot effectively protect the fan blade.

Abstract: A blower has: a fan generating an air flow in an axial direction of a rotary shaft; a tubular motor holder 30 formed in a tubular shape and holding the motor radially inside thereof; and a fan case part accommodating the motor, the motor holder, and the fan and forming an air flow path. A first rectification parts that is integrally formed is provided on an inside portion of the fan case part. The first rectification part is formed in a rib shape by a first to fourth blade, weakens a rotational component of a flow of air discharged from the fan, and guides the air to smoothly flow in the axial direction. The motor holder is configured so as to have an axial length smaller than the motor.

Abstract: There is provided a fan assembly comprising a motor-driven impeller arranged to generate an airflow, an air outlet arranged to emit the airflow, a plurality of sensors arranged to measure a value for each of a plurality of air quality characteristics, a display and a processor. The processor is configured to receive measured values for each of the plurality of air quality characteristics, identify one of a corresponding set of intervals within which the measured value falls and select an air quality index value associated with the identified interval. The processor is then configured to identify the highest of the selected air quality index values as a current overall air quality index value and to cause the display to display a time series plot of the current air quality index value and a number of preceding air quality index values.

Abstract: In a control system for operating a pump, the pump is pneumatically driven to pump hydraulic fluid to pressurize a closed vessel. The control system includes inlet and outlet ports, a pneumatic regulator, a pressure transducer, and control circuitry. The inlet and outlet ports are configured to receive inlet and output outlet pressurized air, respectively. The outlet pressurized air powers the pump. The pneumatic regulator is disposed between the ports, and configured to receive the inlet air and output the outlet air. The pneumatic regulator includes a valve that modulates pneumatic pressure based on a control signal. The pressure transducer provides a hydraulic pressure signal indicative of pressure at the output of the pump. The control circuitry is configured to adjust a parameter of the control signal based on this hydraulic pressure signal, and output the control signal to the pneumatic regulator to indirectly control operation of the pump.

Abstract: Manual displacement control device (MDC) for hydraulic units has an input shaft mounted rotatably about an input shaft axis in an input shaft block. The input shaft protrudes from the input shaft block with a first end, onto which a rotating torque can be applied. The MDC further includes a control spool housed in a control housing, which is moveable by means of rotating the input shaft for controlling a servo pressure. The control device has positioning means for adjusting and fixing the lateral position of the input shaft with respect to the control housing in a direction perpendicular to the input shaft axis and perpendicular to the direction of a restoring force exerted on the input shaft. The hydraulic unit is adjustable to its neutral position by means of a servo spring bracket providing an end stop surface for a servo spring seat towards the displacement element.

Abstract: A pumping system pumps material or fluid downhole, for example, to perform a stimulation operation. The pumping system can include a hydraulic pump coupled to an intensifier. The intensifier may have a piston which allows for a small footprint as compared to an intensifier with a plunger. The hydraulic cylinder of the intensifier may be protected from the corrosive, erosive and/or abrasive effects of the material or fluid to be pumped by one or more seals. Using the intensifier that includes a piston may provide for a greater reliability of the overall pumping system, as fewer strokes are required, and a compact pumping system, as the stroke length of the intensifier with a piston is less than the stroke length required for a plunger.

Abstract: A method for operating a pump includes establishing a pump limit characteristics diagram by mapping a first system parameter (P1) as a function of a second system parameter (P2) to identify a permissible operating region of the pump; for each first system parameter value (P10), identifying a minimum allowable second system parameter value (P20); monitoring the first system parameter (P1) and identifying a minimum allowable second system parameter value (P20) corresponding to the monitored first system parameter value (P1m); monitoring the second system parameter (P2) and comparing the monitored second system parameter value (P2m) with the identified minimum allowable second system parameter value (P20); and regulating a control valve that controls fluid flow through a return line connecting the suction and discharge sides of the pump so that the monitored second system parameter value (P2m) does not fall below the minimum allowable second system parameter value (P20).

Abstract: An air compressor is received in an accommodation box and contains a body, a cylinder, a motor, and a transmission mechanism. The body includes a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat is accommodated in the first orifice. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to produce compressed air. The motor includes at least one locking extension for engaging the motor with the body. A first end of a respective one locking extension extends from the motor, and a second end of the respective one locking extension is engaged on the body, hence the motor is fixed on the body securely without using any screws.

Abstract: A fan is provided, including: a body including a fan motor unit, which includes an impeller, a motor and an air-output three-way seat and a nozzle connected to an air outlet of the body, wherein the nozzle receives the airflow from the body and emit the airflow, the nozzle includes a nozzle body in a shape of half a frame; the air-output three-way seat includes at least one air inlet, a first air outlet, a second air outlet, and an air-splitting wall body for splitting the airflow passing through the air inlet and then guiding the airflow to the first air outlet and the second air outlet, respectively. The fan changes the moving direction of the airflow therein, and decreases the entire height and volume.

Abstract: A fan is described, with the aid of which a volume flow and/or a mass flow of a medium moved by the fan (1) can be determined. This fan comprises an electric motor (2) and an impeller (3) driven by the electric motor (2), wherein the impeller (3) moves a gaseous medium in a media flow from an inflow side (5) to an outflow side (7). The fan additionally comprises a pressure sensor system, a speed ascertainment system, and an evaluation unit. The pressure sensor system is designed to ascertain an actual pressure difference (?p*) between a first region (10) and a second region (13), wherein the first region (10) and/or the second region (13) is/are formed in the electric motor (2), wherein a pressure (pA) prevails in the first region (10), which corresponds to a pressure (p1) present on the inflow side, wherein a pressure (pB) prevails in the second region (13), which corresponds to a pressure (p2) present on the outflow side.

Abstract: A piston of an air compressor, the air compressor including the piston actuated by a motor to move upward and downward in a cylinder. The piston contains a head accommodating an air stop sheet which has a first bending section being a boundary line of an acting area and a positioning zone of the air stop sheet. The acting zone has a noncircular spacing groove configured to separate an external portion and a circular portion, a neck, and a second bending section, such that an axial line between the circular portion and the external portion is the second bending section at an obtuse angle less than 180 degrees, and the second bending section is defined between a bottom of the circular portion and a top of the external portion at an acute angle ?2.

Abstract: A motorized medical suction pump has a pump assembly for generating an underpressure, a pump assembly carrier for supporting the pump assembly, and a seat for receiving an energy accumulator. The pump assembly arranged in the pump assembly carrier defines a first longitudinal axis, and the seat defines a second longitudinal axis. The pump assembly carrier forms the seat. The second longitudinal axis extends at an angle to the first longitudinal axis. This suction pump is small and compact and has good sound damping.

Abstract: A fan is described with a first conveying element, fluidly connectable with a source of a primary air flow and defining a first passage for the primary air flow; a first mouth receiving a first aliquot of the primary air flow from the first passage; a first Coanda surface onto which the first mouth directs the first aliquot; and a first opening fluidly connected with the first mouth and crossable by the first aliquot coming of the first mouth and a secondary air flow; the fan comprises a second conveying element, fluidly connected with the first conveying element and defining internally a second passage for a second aliquot of the primary air flow, and comprises: a second mouth receiving the second aliquot from the second passage and a second Coanda surface onto which the second mouth directs the second aliquot.

Abstract: A method for operating a pump of a delivery unit, in particular of a fluid supply system, having a pump chamber and an actively controllable inlet valve and an actively controllable outlet valve for the pump chamber, wherein, for the delivery of a fluid, a pressure (p), which is to be provided by the pump, of the fluid for delivery is controlled in closed-loop fashion on the basis of a manipulated variable (V), and wherein, within one full cycle (Z) of the pump (200), at least one of inlet valve (211) and outlet valve (212) is activated only if fluid is to be delivered, and is not activated if no fluid is to be delivered, and to a fluid supply system.

Abstract: A small lightweight battery operated remote switched bilge pump is provided weighing less than one pound for installing in a small watercraft, including a kayak, canoe, sailboat, row boat, dingy, featuring a bilge pump having a low voltage inline pump, a housing having a compartment with an integrated strainer base to receive the low voltage inline pump, and having a watertight compartment to receive lightweight batteries to power the bilge pump for about 1.5 hours, and a switch assembly to selectively operate on/off functionality of the bilge pump remotely; and a Velcro® arrangement to couple the bilge pump to a surface of the small watercraft to allow easy installation of the bilge pump in about 15 seconds to perform bilge pump functionality without drilling or making holes in the small watercraft, and to allow easy removal of the bilge pump for cleaning and battery replacement.

Abstract: An air compressor is received in an accommodation box and contains a body, a cylinder, a motor, and a transmission mechanism. The body includes a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat is accommodated in the first orifice. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to produce compressed air. The motor includes at least one locking extension for engaging the motor with the body. A first end of a respective one locking extension extends from the motor, and a second end of the respective one locking extension is engaged on the body, hence the motor is fixed on the body securely without using any screws.