Improved junction box for circulating preheater of single-cavity permanent magnet rotor pump

Abstract

The invention discloses an improved junction box for a circulating preheater of a single-cavity permanent magnet rotor pump and belongs to the field of engine preheaters. The improved junction box can be used in preheaters or electric appliances of the same like. The improved junction box aims at improving the ingress protection (IP) level of the like preheaters. The improved junction box is characterized in that the combination portion of a junction box cover and a cavity main body are totally embedded into the cavity main body, an input socket aperture, a water drainage hole with the edge protruded and a terminal hole with the end protruded are arranged at the bottom of the junction box cover, an input socket penetrates through the input socket aperture, and the socket is put downwards. A polyethylene (PE) protection grounding terminal penetrates through the terminal hole to protrude out of the outer lateral surface of the junction box cover and is used for being electrically connected with a vehicle body to enable the vehicle body to be grounded.

Description

technical field [0001] The invention relates to an improved junction box for a circulating preheater of a single-cavity permanent magnet rotor pump, which belongs to the field of engine preheaters and can also be applied to similar preheaters or electrical appliances or equipment with similar structures in other fields. Background technique [0002] In cold environments, motor vehicle engines need to be warmed up. Through preheating, the cold start becomes a hot start, which not only starts smoothly, but also greatly reduces engine wear, and greatly reduces fuel consumption and emissions of polluting gases in the exhaust. [0003] Usually, the engine is preheated by using an engine preheater (Engine Preheater) to heat the engine. The electric engine preheater has the advantages of simple installation and use, low price, good reliability and safety, etc., and is the most widely used. [0004] An important type of electric engine preheater is the so-called "One-tank Pump-cir...

AI Technical Summary

Problems solved by technology

Due to this prejudice, the existing structure has the following defects: first, because the socket of the input socket is facing the side, water is easy to flow or infiltrate in the socket; or the mutual joints seep into the junction box; water may splash into the junction box from the drain hole at the bottom of the junction box cover, these defects reduce the IP protection level, reliability and electrical safety of this preheater

Secondly, the body is not electrically connected to the PE protective ground wire of the power supply to ground the body, which may not meet the special requirements of some countries for the electrical safety of such products

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