Air cleaner

An air cleaner, comprising:

• an air cleaning module including a first fan, a first motor coupled to the first fan in a vertical direction, and a discharge guide configured to discharge air passing through the first fan, the discharge guide including a discharge grill;
• an air flow adjuster provided above the air cleaning module and including a second fan, a second motor coupled to the second fan, and an introduction grill into which the air discharged from the discharge grill is introduced;
• and
• a rotation guide device provided between the introduction grill and a top portion of the air cleaning module, wherein the rotation guide device includes:
• a guide main body disposed on the top portion of the air cleaning module;
• a fixing guide fixed to the guide main body and having a gear and a first guide surface provided on an upper portion of the fixing guide;
• and
• a rotational guide coupled on a lower side of the introduction grill, wherein the rotational guide comprises a second guide surface and a rack provided on the second guide surface, wherein the gear is configured to move the rack so that the first guide surface is able to slide along the second guide surface so as to cause the air flow adjuster to rotate between a first position in which an upper surface of the air flow adjuster extends substantially parallel to an upper surface of the air cleaning module and a second position in which the upper surface of the air flow adjuster is inclined with respect to the upper surface of the air cleaning module, wherein when the air flow adjuster is in the first position, rotational axes of the first motor and the second motor extend in the vertical direction and the rotation guide device is disposed between a center portion of the introduction grill and the top portion of the air cleaning module along the vertical direction, and wherein when the air flow adjuster is in the second position, the rotational axes of the first motor and the second motor do not extend in a same direction.