The invention relates to a silencer and a vehicle-mounted air conditioner silencing
system, in the using process, fluid is introduced into an input
pipe, such as a
refrigerant in a vehicle-mounted airconditioner. The introduced fluid flows into a
first insertion pipe from the input
pipe, and then flows into a silencing cavity through the
first insertion pipe. Due to the fact that the
first insertion pipe is located in the silencing cavity, the cross section between the first
insertion pipe and the silencing cavity changes suddenly to cause
acoustic impedance changes, and an expansion type silencing structure is formed. Then, the fluid flowing into the silencing cavity sequentially flows through all split cavities through flow guide holes in partition plates; and finally, the fluid flows into an output pipe from the last split cavity and flows out of the output pipe. Due to the fact that silencing holes are formed in the partition plates, the silencing holes and the split cavities in the two sides of the silencing holes form a
resonance type sound absorption structure, and
noise in the silencing cavity is further weakened. Meanwhile, the silencer has the advantages of being simplein structure, low in manufacturing cost, convenient to use and the like, and large-scale application and popularization of the silencer are facilitated.