Electric water pump

Abstract

An electric water pump comprises a casing, a sleeve, a water guide cover and a water drawing mechanism. The casing includes a communicating pipe body protruding from the outer peripheral surface of the casing body extending forward and backward and passing through a communicating flow passage. The casing body has a through hole communicating with the rear end of the communicating flow passage. The sleeve has a communicating hole communicating its interior with the through hole. The water guide cover is installed and fixed on the casing and the front end of the sleeve, and has a drainage hole connected between the water inlet and the communicating channel. The water-drawing mechanism includes a rotating shaft pivotally arranged in the sleeve and extending into the water-drawing space. The rotating shaft is pierced with a heat-dissipating channel connecting the communication hole and the water-drawing space. Through the structural design of the connecting pipe protruding from the outer surface of the shell body, the internal temperature of the electric water pump can be effectively reduced, and its service life and heat dissipation efficiency to the engine can be relatively improved.

Description

technical field [0001] The invention relates to a water pump, in particular to an electric water pump. Background technique [0002] In a car, in order to reduce the engine operating temperature, an electric water pump in the cooling system pumps the water tank liquid into the cooling channel of the engine to dissipate the heat energy of the engine. However, during the operation of the electric water pump, both the stator and the internal control circuit will generate heat energy. Although the external heat energy of the stator can be conducted to the outside or transmitted by air convection to dissipate heat by itself, the internal heat energy of the stator will gradually accumulate, resulting in internal heat generation in the electric water pump. High temperature, in order to avoid failure of the electric water pump itself due to overheating, and cause the temperature of the water tank fluid pumped into the engine to be too high, resulting in low heat dissipation efficien...

AI Technical Summary

Problems solved by technology

However, when the above-mentioned heat dissipation design is actually used, when the internal chamber 100 is filled with water, because the water tank liquid enters and exits the internal chamber 100 through the perforation 111, it is easy to cause the backflow of the water tank liquid to be unstable and not smooth. , so that the heated water tank liquid in the inner chamber 100 is not easy to flow back into the water drawing space 101, and the relatively low temperature water tank liquid in the water drawing space 101 is not easy to re-enter the inner chamber 100, so that the electric water pump 1 cannot be effectively dissipated. Internal thermal energy, so that the overall temperature of the electric water pump 1 is still relatively high, causing the temperature of the water tank fluid pumped into the engine (not shown) to be relatively high, so the improvement of the heat dissipation efficiency of the engine is quite limited

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