Disclosed is an air conditioner including a first frame including a through hole, a second frame rotatably coupleable to the first frame, the second frame including a burring portion at least a portion of which is insertable into the through-hole in a first direction, where while the burring portion is inserted into the through-hole of the first frame, the burring portion protrudes in the first direction, and a burring hole formed by the burring portion, and a fastening member insertable into the burring hole in a second direction opposite to the first direction and configured to function as a rotary shaft of the second frame, where while the fastening member is inserted into the burring hole, the fastening member protrudes in the second direction.

A heating, ventilation, and/or air conditioning (HVAC) unit includes a housing having a base wall, a first electrical component coupled to the base wall, a panel movably coupled to the housing and configured to transition between a closed configuration that defines an air gap between the panel and the base wall and that blocks access to the first electrical component and an open configuration that enables access to the first electrical component, and a second electrical component coupled to the panel. The second electrical component is disposed on a side of the panel opposite the air gap in the closed configuration of the panel.

A heating, ventilation, and/or air conditioning (HVAC) unit includes a housing having a base wall, a first electrical component coupled to the base wall, a panel movably coupled to the housing and configured to transition between a closed configuration that defines an air gap between the panel and the base wall and that blocks access to the first electrical component and an open configuration that enables access to the first electrical component, and a second electrical component coupled to the panel. The second electrical component is disposed on a side of the panel opposite the air gap in the closed configuration of the panel.

An air conditioner outdoor unit, including a housing, a heat exchanger, a fan wheel, an electric motor and a support, and the housing is provided with a first cavity and an air outlet in communication with the first cavity; the heat exchanger is arranged in the first cavity and connected to the housing; in a horizontal direction, the heat exchanger includes a first portion and a second portion which are opposite each other, a minimum distance S being provided between the first portion and the second portion; the support is arranged in the first cavity, is connected to the housing, and is located above the heat exchanger; the electric motor is in the first cavity and is arranged on the support; the fan wheel is in the first cavity, is connected to the electric motor, and has a diameter of D; and a first portion of the support is opposite the heat exchanger in a vertical direction, the minimum distance between the first portion and the heat exchanger in the vertical direction is L1, and when S<D, 0≤L1≤0.15D.

An air conditioner outdoor unit, including a housing, a heat exchanger, a fan wheel, an electric motor and a support, and the housing is provided with a first cavity and an air outlet in communication with the first cavity; the heat exchanger is arranged in the first cavity and connected to the housing; in a horizontal direction, the heat exchanger includes a first portion and a second portion which are opposite each other, a minimum distance S being provided between the first portion and the second portion; the support is arranged in the first cavity, is connected to the housing, and is located above the heat exchanger; the electric motor is in the first cavity and is arranged on the support; the fan wheel is in the first cavity, is connected to the electric motor, and has a diameter of D; and a first portion of the support is opposite the heat exchanger in a vertical direction, the minimum distance between the first portion and the heat exchanger in the vertical direction is L1, and when S<D, 0≤L1≤0.15D.

The present disclosure provides a fan including a hub and multiple fan blades coupled to the hub and located circumferentially along the hub. Each fan blade extends between a root and a tip edge thereof and includes a first portion inclined at a first predefined angle with respect to the hub. The first portion induces an axial flow of air. The fan blade also includes a second portion extending from the first portion and between a leading edge and a trailing edge of the fan blade. The second portion is embodied as an airfoil defining an angle of attack to induce a radial inward flow of air. A radius of curvature of a trailing edge segment of the second portion is less than a radius of curvature of a leading edge segment of the second portion.

The present disclosure provides a fan including a hub and multiple fan blades coupled to the hub and located circumferentially along the hub. Each fan blade extends between a root and a tip edge thereof and includes a first portion inclined at a first predefined angle with respect to the hub. The first portion induces an axial flow of air. The fan blade also includes a second portion extending from the first portion and between a leading edge and a trailing edge of the fan blade. The second portion is embodied as an airfoil defining an angle of attack to induce a radial inward flow of air. A radius of curvature of a trailing edge segment of the second portion is less than a radius of curvature of a leading edge segment of the second portion.

An air conditioner capable of satisfactorily preventing noise from entering an indoor space includes: an indoor unit that is fixed to a wall surface of an indoor space and houses an indoor heat exchanger; and an outdoor unit that houses an outdoor heat exchanger connected to a refrigerant circuit that includes the indoor heat exchanger. The outdoor unit includes an outside casing that is fitted into an opening formed in a building wall partitioning an outdoor space and the indoor space from each other and defines an internal space that is open to the outdoor space and isolated from the indoor space by being surrounded by a sound insulation wall, and an inside casing that is disposed in the internal space and houses the outdoor heat exchanger.

An air conditioner capable of satisfactorily preventing noise from entering an indoor space includes: an indoor unit that is fixed to a wall surface of an indoor space and houses an indoor heat exchanger; and an outdoor unit that houses an outdoor heat exchanger connected to a refrigerant circuit that includes the indoor heat exchanger. The outdoor unit includes an outside casing that is fitted into an opening formed in a building wall partitioning an outdoor space and the indoor space from each other and defines an internal space that is open to the outdoor space and isolated from the indoor space by being surrounded by a sound insulation wall, and an inside casing that is disposed in the internal space and houses the outdoor heat exchanger.

An air conditioner according to the disclosure includes a blowing fan including a suction port, a bell mouth formed along a circumferential direction of the suction port, and a fan guard extending from an inner circumferential surface of the bell mouth and covering the suction port, wherein the fan guard includes a plurality of annular ribs arranged concentrically with a gap from a center of the fan guard corresponding to a rotation axis of the blowing fan, the plurality of annular ribs includes a first annular rib adjacent the outermost edge of the fan guard and the first annular rib is arranged to be inclined to the rotation axis in a direction corresponding to the tangent line of the bell mouth.