Cooling methods for electrically operated diaphragm pumps

• Main Author: Joshua D West
• Format: Patent
• Language: English
• Published: 13.12.2017
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

A diaphragm pump 10 comprising (i) a motor 20 driving an armature 30 in reciprocating linear motion, the armature carrying a diaphragm 42 positioned in a pumping chamber 46, the diaphragm pumping fluid into and out of the pumping chamber as it flexes back and forth, (ii) a compartment on the side of the diaphragm 42 opposite 41 to the one facing the pumping chamber, having an intake valve 84 and an exhaust valve 86 through which ambient air 90 is drawn into and expelled from the compartment respectively as the diaphragm flexes, for cooling purposes. The exhaust air 92 may be directed over fins disposed on the motor housing to cool it by convection. Multiple intake and exhaust valves may be arranged in the cooling air compartment. The pump is preferably a double diaphragm pump with two diaphragms coupled one on each end of the armature and operating inversely in their respective pumping chambers, the aforementioned cooling system being duplicated. According to a second aspect, the pump has a manifold (60, fig. 4) in direct contact with the motor housing and the fluid pumped into and out of the pumping chamber(s) passes through the manifold to cool the motor.