Cordless vacuum cleaner in which cleaner body and brush device are able to communicate

A cordless vacuum cleaner comprising:

• a battery:
• a power line configured to transmit power from the battery to a cleaner body and a brush device;
• and
• a signal line different from the power line and configured to transmit and receive a signal between the cleaner body and the brush device when the brush device is connected to the cleaner body,
• wherein:
• the cleaner body comprises a first processor configured to control an operation of a first switching device connected to the signal line to transmit a first signal to the brush device through the signal line and receive a second signal from the brush device through the signal line, and
• the brush device comprises a second processor configured to control an operation of a second switching device connected to the signal line to transmit the second signal to the cleaner body through the signal line and receive the first signal from the cleaner body through the signal line,
• wherein:
• the first processor is further configured to obtain state data of the suction motor, and
• the first processor is further configured to:
• stop an operation of the suction motor when an abnormality of the suction motor is identified;
• and
• transmit a signal for stopping an operation of the brush device to the brush device through the signal line by controlling an on/off operation of the first switching device.

A cordless vacuum cleaner comprising:

• a battery:
• a power line configured to transmit power from the battery to a cleaner body and a brush device;
• and
• a signal line different from the power line and configured to transmit and receive a signal between the cleaner body and the brush device when the brush device is connected to the cleaner body,
• wherein:
• the cleaner body comprises a first processor configured to control an operation of a first switching device connected to the signal line to transmit a first signal to the brush device through the signal line and receive a second signal from the brush device through the signal line, and
• the brush device comprises a second processor configured to control an operation of a second switching device connected to the signal line to transmit the second signal to the cleaner body through the signal line and receive the first signal from the cleaner body through the signal line,
• wherein:
• the first processor is further configured to obtain state data of the suction motor, and
• wherein the first processor is further configured to transmit the state data of the suction motor and the data indicating the current state of the brush device, included in the second signal to a main processor included in the cleaner body.

A cordless vacuum cleaner comprising:

• a battery;
• a power line configured to transmit power from the battery to a cleaner body and a brush device;
• and
• a signal line different from the power line and configured to transmit and receive a signal between the cleaner body and the brush device when the brush device is connected to the cleaner body,
• wherein:
• the cleaner body comprises a first processor configured to control an operation of a first switching device connected to the signal line to transmit a first signal to the brush device through the signal line and receive a second signal from the brush device through the signal line, and
• the brush device comprises a second processor configured to control an operation of a second switching device connected to the signal line to transmit the second signal to the cleaner body through the signal line and receive the first signal from the cleaner body through the signal line, and
• wherein the cleaner body is configured to determine that communication with the brush device is not possible when the second signal is not received for a certain period of time after the first signal is transmitted through the signal line.