Vacuum pump with a hood

Abstract

A vacuum pump includes a pumping system (30) located in a pump housing (1) and a hood (1) at least partially surrounding the pump housing at least in the region of the pumping system to provide for at least partial dissipation of heat generated in the pumping system.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a vacuum pump having a housing which has inlet and outlet and in which a pumping system and a motor for driving the pumping system are located.[0003]2. Description of the Prior Art[0004]Vacuum pumps generate heat in their interior as a result of compression therein of pumped gases. However, the gas compression is not the only source of heat in the vacuum pumps. In most cases, the vacuum pumps includes movable parts driven by respective drives. These drives have all a certain efficiency level so that a power dissipation takes place which, as a rule, is converted into heat. Heat is also generated as result of friction in the bearings and by other sources. The generated heat is released into the environment and presents a source of danger for a pump user.[0005]Therefore, there is a need to protect the vacuum pump user. In state of the art, the pumps are provided with handles which can be us...

AI Technical Summary

Benefits of technology

[0007]This and other objects of the present invention which will become apparent hereinafter, are achieved by providing a hood that at least partially surrounds the pump housing. The hood prevents contact with heat conducting components of the pump, providing protection for the pump user. In the region of hot parts of the pump, there are provided surfaces which can be contacted without danger to the user. Therefore, the increased costs which are associated with an unnecessary large hood, are eliminated. The hood is a simple part, and the access to all of the operational elements can be insured by forming in the hood recesses and / or openings which can be economically produced.

[0008]According to one modification of the present invention, an intermediate member is arranged between the hood and the pump housing, so that the housing and the hood are not in a surface contact with each other. This reduces heat transmission to the hood. In addition, the intermediate member provides spacing between the pump housing and the hood, providing an intermediate space filled with air that functions as an isolating air cushion in the absence of a forced aeration that causes an air exchange.

[0009]According to a further modification of the present invention, the intermediate member contains material components that damps mechanical vibrations imparted to the intermediate member. This prevents transmission of the vibrations to the hood, which provides for a generally silent operation of the vacuum pump. Little noise is transmitted to the environment, which is advantageous for use of the inventive vacuum pump in a laboratory environment in which operational personnel is always present.

Problems solved by technology

However, the gas compression is not the only source of heat in the vacuum pumps.

The generated heat is released into the environment and presents a source of danger for a pump user.

However, the handles do not provide protection against a contact with the pump and are, therefore, not satisfactory.

This solution is associated with high costs and presents a problem from the point of view of access to the operational elements of the pump.

Further, there is a danger of the pump being overheated.

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