Filter supporting assembly and air conditioning system

A filter screen supporting assembly, comprising:

• a substrate having a slot allowing a filter screen to pass through;
• and
• a support plate having a first side and a second side, wherein the first side of the support plate is pivotally connected to the substrate at a first side of the slot of the substrate, and the second side of the support plate is detachably connected to the substrate at a second side of the slot of the substrate, so that the support plate fills at least a part of the slot of the substrate to support the filter screen;
• wherein, the substrate and/or the support plate are provided with additional supporting piece, such that after the connection between the second side of the support plate and the substrate is removed during the replacement of the filter screen, the support plate is supported by the additional supporting piece so that the support plate retains its support for the filter screen, and after the support from the additional supporting piece is removed, the support plate pivots to allow the filter screen to pass through the slot.