Japan Aerospace Exploration Agency

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Hideshi Oinuma

Tatsuya Ishii

Kenichiro Nagai

Tsuyoshi Uchida

Kouji Yamashita

Junichi Oki

Shunji Enomoto

Katsumi Takeda

A pressure fluctuation absorbing structure includes: a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof; and a partition member disposed on the surface of the perforated member and including a partition wall that partitions the plurality of holes in units of a predetermined number of one or more holes, and a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes.

Pressure fluctuation absorbing structure

Air conditioning equipment that ensures sufficient noise reduction in the low frequency range of a few hundred hertz or below. The air conditioning equipment is characterized by including a heat exchanger for exchanging heat between air and refrigerant of a refrigeration cycle, a fan that supplies air to the heat exchanger, an air duct in which the fan is installed and through which acoustic waves are propagated, and a plurality of small holes that blows a jet into the air duct and sucks a jet from the air duct by a pressure difference between the blow side and the suction side of the fan.

Air conditioning equipment, fan equipment, method of reducing noise of equipment, pressure pulsation reducer for refrigeration cycle equipment, pressure pulsation reducer for pump equipment and method of reducing pressure pulsation of equipment

Growing community of inventors

Tokyo, Japan

Hideshi Oinuma