Ice water pump

Abstract

A water pump for pumping ice water is provided. The pump includes a motor assembly, a cover, and a tube. The motor assembly includes water pumping blades rotatably set at one end of the motor assembly. The motor assembly includes a water-resistant housing that is set outside and partially encloses the motor assembly. The cover is attached to an end of the water-resistant housing to enclose the motor assembly. The tube extends through the cover to communicate between inside and outside of the cover. Thus, when the pump is positioned in a tank containing ice water, air is allowed to freely flow through the tube between inside and outside of the cover to balance pressures between inside and outside of the pump so as to prevent cracking caused by thermal expansion and contraction from occurring in connection portions of the pump.

Description

(a) TECHNICAL FIELD OF THE INVENTION[0001]The present invention generally relates to a pump, and more particularly to a pump that has a construction capable of preventing cracking caused by thermal expansion and contraction from occurring in outer enclosure so as to be fit for pumping ice water or low temperature water.(b) DESCRIPTION OF THE PRIOR ART[0002]A submerged pump is set under water and is thus provided with excellent water tightness. The submerged pump is often constructed to enclose a motor with a water resistant housing. To simplify the manufacturing, the housing is often composed of two separate parts. In the manufacturing and assembling, the motor is first fit into one of the parts and then other part of the housing is fit to an opposite end of the motor to completely enclose the motor, so that water can be completely prevented from entering the motor and thus realizing water tightness.[0003]When the submerged pump is put in a container (such as an ice water tank) that...

AI Technical Summary

Benefits of technology

[0005]An objective of the present invention is to provide an ice water pump that is suitable for pumping ice water or low temperature liquids. In structure, the ice water pump of the present invention comprises a motor assembly that comprises water pumping blades rotatably set at an end of the motor assembly. The motor assembly comprises a water-resistant housing arranged outside and partially enclosing the motor assembly. A cover is coupled to an end of the water-resistant housing to completely enclose the motor assembly with the water-resistant housing. A tube extends through the cover to communicate between inside and outside of the cover. When the pump is set inside an ice water tank that contains therein ice water, air is allowed to freely flow through the tube between inside and outside of the cover to balance pressures between inside and outside of the pump so as to prevent cracking caused by thermal expansion and contraction from occurring in connection portions of the pump and thus prevent the ice water from entering the motor assembly to protect the motor assembly from damage by the ice water.

Problems solved by technology

When the submerged pump is put in a container (such as an ice water tank) that contains ice water or low temperature liquid for pumping water to an other container, the connection or joint of the housing of the motor is easily subjected to cracking caused by thermal expansion and contraction, leading to undesired penetration of water into the motor to damage the components of the pump and thus damaging and shortening the lifespan of the submerged pump.

The conventional underwater pumps or submerged pumps are not suitable for pumping ice water or low temperature liquids.

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