Sprayer thermal protection

摘要

In an electric airless sprayer (16), as the motor (14) temperature approaches allowable limits, several performance cutbacks can be used to prevent overheating. The preferred method is to gradually reduce the controlled pressure. If the temperature continues to rise, the control (20) switches to on/off or deadband control. If the temperature continues to rise in spite of these measures, the control (20) shuts the unit down.

主权项

1. A method for thermally protecting a variable speed electric paint sprayer having an electric motor, a control and a temperature, and which operates to maintain a user-selected controlled pressure, the method comprising:
monitoring the temperature of said electric motor; and reducing said controlled pressure from said user-selected controlled pressure and continuing to continuously spray at a reduced consistent non-zero pressure when said electric motor temperature exceeds a predetermined level.