A method and apparatus for an inline air purification system is described herein. An example apparatus includes a housing, a high-velocity air flow guide, a filter assembly, and a fan. The high-velocity air flow guide includes a first portion and a second portion. The first portion is configured to form a passage within the housing, and the second portion is configured to divert and accelerate air flow of the ambient air from the passage to a chamber of the housing. The filter assembly includes one or more filtering elements configured to receive the ambient air from the chamber. The fan is configured to draw the ambient air from the chamber through the filter assembly and to generate processed air from the ambient air. The housing is located in an HVAC duct, and occupies only part of the cross-sectional area of the duct. The remaining area of the duct accommodates bypass air flow to a primary fan in the HVAC system.

An indoor unit of an air-conditioning apparatus includes: an air purifying filter including a filter body for air purification, a pair of bearing units, and a pair of protrusions that extend outward from the filter body; and an air filter for dust collection including a pair of shaft units coupled with the respective bearing units, and a pair of supports accommodating the respective protrusions. The protrusions are placed into the respective supports from the direction of the respective shaft units.

An indoor unit of an air-conditioning apparatus includes: an air purifying filter including a filter body for air purification, a pair of bearing units, and a pair of protrusions that extend outward from the filter body; and an air filter for dust collection including a pair of shaft units coupled with the respective bearing units, and a pair of supports accommodating the respective protrusions. The protrusions are placed into the respective supports from the direction of the respective shaft units.

For an air conditioner, a quick release mechanism to expose a filter includes a body, a front panel, and a locking mechanism. The front panel is pivotally mounted on the body. The locking mechanism has a guide member, a slider, a compressible spring as a biasing member, and a push block. The slider is slidably disposed in the guide member. The slider has a hook portion. The biasing member provides a force to the slider. The push block is held in the guide member when the push block engages the hook portion, and the push block is ejected from the guide member by the biasing member when the push block disengages from the hook portion.

For an air conditioner, a quick release mechanism to expose a filter includes a body, a front panel, and a locking mechanism. The front panel is pivotally mounted on the body. The locking mechanism has a guide member, a slider, a compressible spring as a biasing member, and a push block. The slider is slidably disposed in the guide member. The slider has a hook portion. The biasing member provides a force to the slider. The push block is held in the guide member when the push block engages the hook portion, and the push block is ejected from the guide member by the biasing member when the push block disengages from the hook portion.

An operation mode of an air cleaner is changed according to the degree of indoor air contamination and an indoor space condition, and one or more filters of the air cleaner can be easily cleaned. The air cleaner includes a housing, an inlet located at a lower part of the housing, a filter assembly, an outlet, and a brush unit. The filter assembly is located above the inlet, and a diameter of the filter assembly is gradually shortened in the direction from an upper part of the filter assembly to a lower part of the filter assembly. The discharge port is located above a second filter assembly. The brush unit is used to eliminate contaminants from an outer surface of the filter assembly.

An operation mode of an air cleaner is changed according to the degree of indoor air contamination and an indoor space condition, and one or more filters of the air cleaner can be easily cleaned. The air cleaner includes a housing, an inlet located at a lower part of the housing, a filter assembly, an outlet, and a brush unit. The filter assembly is located above the inlet, and a diameter of the filter assembly is gradually shortened in the direction from an upper part of the filter assembly to a lower part of the filter assembly. The discharge port is located above a second filter assembly. The brush unit is used to eliminate contaminants from an outer surface of the filter assembly.

An air treatment device and an air conditioner indoor unit are provided. The air treatment device has an air outlet frame of a purification air duct. The air outlet frame has a ventilation hole and a cooperation hole. A water tank drawer is moveable on the air outlet frame and has two spaced-apart cooperation protrusions on a bottom wall thereof. A safety locking member of the air treatment device has a rotating shaft and a locking member. The rotating shaft is rotatable in the cooperation hole to switch the locking member between a locking position of the locking member and a movement-permitting position of the locking member. At the locking position, the locking member engages the cooperation protrusions to prevent the displacement of the cooperation protrusions. At the movement-permitting position, the locking member is located between the two cooperation protrusions to avoid engagement with the cooperation protrusions.

An air treatment device and an air conditioner indoor unit are provided. The air treatment device has an air outlet frame of a purification air duct. The air outlet frame has a ventilation hole and a cooperation hole. A water tank drawer is moveable on the air outlet frame and has two spaced-apart cooperation protrusions on a bottom wall thereof. A safety locking member of the air treatment device has a rotating shaft and a locking member. The rotating shaft is rotatable in the cooperation hole to switch the locking member between a locking position of the locking member and a movement-permitting position of the locking member. At the locking position, the locking member engages the cooperation protrusions to prevent the displacement of the cooperation protrusions. At the movement-permitting position, the locking member is located between the two cooperation protrusions to avoid engagement with the cooperation protrusions.

The indoor unit of a mini-split heat pump has an auxiliary filter mounted atop the air inlet opening of the indoor unit. The auxiliary filter comprising three parallel filtering stages and each of these filtering stages having an air flow capacity equivalent to a nominal air flow rating of the indoor unit. The three filtering stages improve low-air-quality tolerance of a residential indoor unit of a mini-split heat pump, so that commercial and industrial users can also benefit from these high efficiency heat pumps to reduce their carbon footprint.