초록 ▼

A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constr

A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge.

대표청구항 ▼

A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constr

A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within removable pumping cartridges that are constructed and configured to be coupled to a reusable pump drive component. In other embodiments, the pumping cartridges include multiple pump chambers, which pump chambers are operated so that a pump flow rate of one pump chamber is a predetermined fraction of the pump flow rate of another pump chamber within the pumping cartridge. fan and the scroll housing, the second annular fan rib extending into a second annular recess formed in the other of the lower side of the fan and the scroll casing; a cooling passage structure which includes a case disposed about the motor, the cooling passage having an upstream end fluidly communicated with the scroll casing downstream of the fan at a first location of high static pressure and a downstream end which includes a space enclosed by the lower side of the fan and the second annular fan rib, and which is communicated with the scroll casing at a second location of low static pressure. 2. A centrifugal multiblade blower comprising: a multiblade fan (2) having a plurality of blades (2a); a fan motor (3) having a motor shaft (3a) on which the multiblade fan (2) is mounted; a scroll casing (4) that accommodates therein the multiblade fan (2) and has a discharge port (4c) and cooperates with an outer periphery of the multiblade fan (2) to define a spiral scroll chamber (4a); the casing comprising: (i) a suction-side case plate (4d) having a suction port (4b); and (ii) a motor-side case plate (4e) which is located opposite to the suction-side case plate (4d) in such a manner as to sandwich the multiblade fan (2) between the suction-side case plate (4d) and the motor-side case plate (4e), and on which a motor body (3b) of the fan motor (3) is mounted; a first counter-flow prevention means (10) for preventing part of air flowing through the scroll chamber (4a) from flowing through a first aperture (G1) defined between the multiblade fan (2) and the suction-side case plate (4d) back to the suction port (4b); a second counter-flow prevention means (20) for preventing part of air flowing through the scroll chamber (4a) from flowing through a second aperture (G2) defined between the multiblade fan (2) and the motor-side case plate (4e) back to an upstream side of the scroll chamber (4a); a length (L1) of the scroll chamber (4a) measured in an axial direction of the motor shaft (3a) being dimensioned to be longer than a length (L2) of the multiblade fan (2) measured in the axial direction of the motor shaft (3a), and the scroll chamber (4a) being gradually enlarged toward the discharge port (4c) of the casing (4); the second counter-flow prevention means (20) comprising: (i) a second fan rib (21) provided on the multiblade fan (2) so that the second fan rib is protruded from the multiblade fan (2) to the second aperture (G2), and coaxially arranged with respect to the axis of the multiblade fan (2) and extending completely in the circumferential direction of the multiblade fan (2) around an entire circumference of an outer peripheral portion of a base of the multiblade fan (2) facing a rear end of the motor shaft (3a); and (ii) a second case rib (22) provided on the motor-side caseplate (4e) so that the second case rib (22) is protruded from the motor-side case plate (4e) to the second aperture (G2), and coaxially arranged with and radially spaced apart from the second fan rib (21), and extending completely in the circumferential direction of the multiblade fan (2) so that the second fan rib (21) and the second case rib (22) are located close to and radially spaced from each other by a predetermined distance; a motor protective case (3c) that protects the motor body (3b); a motor cooling passage system using a pressure differential between a pressure in a high-pressure area of the scroll chamber having a comparatively high pressure and a pressure in a low-pressure area of the scroll chamber having a lower pressure than the pressure in the high-pressure area, the motor cooling passage system comprising: (i) a communication portion (6) that intercommunicates an interior space of the motor body (3b) and the high-pressure area of the scroll chamber; (ii) a cut-out portion (23) formed in the second case rib (22) and exposed to the low-pressure area of the scroll chamber to intercommunicate the low-pressure