High pressure washer

Abstract

The invention provides a novel high pressure washer. By adopting a structure in no need of arranging a dividing wall in a cavity, the thickness of a cavity layer can be reduced, thereby increasing a flow speed of cooling water flowing in a cavity and further realizing improvement of a cooling effect. The high pressure washer (10) is provided with an electric motor (12) as a drive source, and a pump structure (21) which is driven by the electric motor (12) and generates high pressure water by pressurizing supplied water, so as to form a cavity (15) communicating with cooling water for cooling the electric motor (12) in an approximately cylindrical shape in a manner of surrounding the periphery of the electric motor (12). A water suction port (16) for introducing the cooling water to the cavity (15) and a water drainage port (17) for introducing the cooling water out are arranged toward the same horizontal direction in a tangential direction of the cavity (15) in the approximately cylindrical shape.

Description

technical field [0001] The present invention relates to a high-pressure cleaner, and in particular to an improvement in a mechanism for cooling an electric motor as a driving source. Background technique [0002] Conventionally, there has been known a high-pressure cleaner that sprays water with strong pressure, thereby dropping stains adhered to a bed, wall, concrete, or the like. A general high-pressure cleaner has: an electric motor as a driving source; a pump mechanism that is driven by the electric motor to pressurize the supplied water to generate high-pressure water, and the water supplied from the suction port is driven by the electric motor The pump mechanism pressurizes to become high-pressure water, and the high-pressure water is discharged through the drain port and drain device (nozzle gun, etc.). [0003] In the conventional high-pressure cleaner mentioned above, various mechanisms for cooling the electric motor which is a drive source are proposed. For examp...

AI Technical Summary

Problems solved by technology

[0010] However, when a partition wall is provided in the chamber as in the prior art, there is a problem that the chamber layer becomes thick.

That is, since the discharge flow rate of the high-pressure water used in the high-pressure cleaner is small, when the chamber layer becomes thicker, the flow rate of the cooling water flowing in the chamber becomes lower, thereby causing a problem that the heat exchange rate decreases.

In addition, when the chamber layer becomes thicker, various problems arise, such as air remaining in the chamber, or time required for draining after using a high-pressure cleaner.

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