Outdoor power device internal cooling system
AssigneeHusqvarna AB
InventorsOskar Bergquist, Stefan Steen
Life of this patent
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Abstract
An electric power device may include a casing, a motor disposed within the casing, a control unit, and an air channel. The motor may be configured to operate a working implement of the device and may include a motor housing having at least one outlet through which air cooling the motor exits the motor housing. The air channel may be configured to enclose the at least one outlet of the motor housing. The air channel may provide a passage for the air drawn from outside the casing and through the motor housing out of the casing via an exhaust outlet disposed in the casing at an end of the air channel.
Claims18
An electric power device comprising:
- a casing;
- a motor disposed within the casing, the motor being configured to operate a working implement of the device and including a motor housing having at least one outlet through which air cooling the motor exits the motor housing, the air drawn from outside the casing, into the motor housing, and passing through the motor housing to the at least one outlet;
- an air channel enclosing the at least one outlet of the motor housing, the air channel providing an enclosed passage for passing all the air exiting the motor housing out of the casing via an exhaust port disposed in the casing at an end of the air channel, said air channel being arranged to ensure that the air is channeled out of the electric power device while avoiding any recirculation of the air within other portions of the device inside the casing;
- and
- a control unit positioned within the air channel and configured to provide control over operation of the electric power device, wherein the air passing through the air channel cools the control unit prior to exiting the air channel.
A method of cooling an electric power device comprising:
- drawing air from outside a casing of the device into the casing;
- drawing the air into a motor of the device;
- cooling the motor by passing the air through a motor housing containing the motor through at least one outlet formed in a body of the motor housing;
- and
- passing all the air exiting the at least one outlet into an air channel that encloses the at least one outlet out of the casing via an exhaust port disposed at an end of the air channel,
- wherein a control unit is positioned in the air channel and the air passing through the air channel cools the control unit prior to exiting the air channel.
An electric power device comprising:
- a casing comprising a plurality of body portions;
- a motor disposed within the casing, the motor being configured to operate a working implement of the electric power device and including a motor housing having at least one outlet through which air cooling the motor exits the motor housing, the air drawn from outside the casing exclusively through gaps between the body portions into the motor housing and passing through the motor housing via an outlet in the motor housing;
- and
- an air channel enclosing the outlet of the motor housing, the air channel providing a passage for passing the air exiting the motor housing out of the casing via an exhaust outlet at an end of the air channel, the exhaust outlet being disposed in an exterior surface of the casing proximate a hand guard of the electric power device, the hand guard being disposed between the working implement and a handle of the electric power device,
- wherein the air channel channels the air out of the electric power device without circulating the air within other portions of the casing.
Dependencies are inferred from the claim text.