Mitsubishi Denki Kabushiki Kaisha

Mitsubisih Denki Kabushiki Kaisha

Masahiro Nakayama

Akira Ishibashi

Yoshihiro Sumida

Hiroki Okazawa

Kunihiro Morishita

Sou Suzuki

Isao Funayama

Tadashi Saitou

This invention relates to an air conditioner having an air inlet at its upper portion. The heat exchanger () includes multiple plate fins () arranged in parallel so that air flows therebetween, and heat transfer tubes () perpendicularly inserted into the plate fins () and arranged perpendicularly to the air flow direction through which working fluid passes. The heat exchanger () includes a lower front heat exchanger (), an upper front heat exchanger (), and a rear heat exchanger () separately produced and arranged to surround the circulating fan (). The air pressure loss of the lower front heat exchanger () is set to be smaller than the air pressure losses of the other heat exchangers.

Indoor unit of air conditioner

In a refrigeration cycle using a cooling medium circuit in which a compressor, a heat-source-side heat exchanger, a decompressor, and a user-side heat exchanger are connected successively for circulating a cooling medium, and refrigerating machine oil having no or extremely low mutual solubility to the cooling medium; an internal diameter of a down comer in which a liquid phase cooling medium flows from the upstream side to the down stream side in the refrigeration cycle is adjusted so that the flow velocity of cooling medium in the down comer is made to be higher than that at which refrigerating machine oil floating in a cooling medium goes down.

Refrigerating/air-conditioning apparatus

Growing community of inventors

Tokyo, Japan

Masahiro Nakayama