Mayekawa Mfg. Co., Ltd.

Iceman Corporation

Toshio Kutsuna

Choiku Yoshikawa

Daiki Kayashima

Nelson Mugabi

Akira Kishimoto

Takumi Shirato

Masaki Katami

Tomoaki Akiyama

Tetsuji Inoue

Nobuo Oosuga

Keito Akiyama

Bo Hu

Mugabi Nelson

Masanori Kando

Reina Akiyama

A defrost system includes a thermosiphon defrost circuit that is provided by being branched from a circulation line, in which, at the time of defrosting, a COrefrigerant staying inside a fin-tube heat exchanger repeats a two-phase change of a gaseous form and reliquefaction, and which forms a COcirculation path together with the fin-tube heat exchanger; electromagnetic opening/closing valves that are closed at the time of defrosting and set the COcirculation path to a closed circuit; and a first electric heater arranged above the thermosiphon defrost circuit so as to be adjacent to the thermosiphon defrost circuit, and naturally circulates the COrefrigerant in the closed circuit at the time of defrosting.

Defrost system which utilizes electric heater for thermosiphon

This ice making machine includes an ice making unit that includes an ice making surface and a cryogen flow channel through which a cryogen for cooling the ice making surface flows; a pump that pressurizes and discharges the cryogen cooled by a heat exchanger; and a control unit that controls a discharge amount of the pump. The cryogen is carbon dioxide, and the control unit controls the pump such that the cryogen is in a gas-liquid mixed state at an outlet of the cryogen flow channel.

Ice making machine

A defrost system includes: a cooling device in a freezer, and includes a casing, a heat exchanger pipe with a difference in elevation in the casing, and a drain receiver unit below the heat exchanger pipe; a refrigerating device to cool and liquefy COrefrigerant; and a refrigerant circuit for permitting the cooled and liquefied COrefrigerant to circulate to the heat exchanger pipe. The defrost system includes a bypass pipe of the heat exchanger pipe to form a COcirculation path; an on-off valve in the heat exchanger pipe to be closed during defrosting so that the COcirculation path is a closed circuit; a pressure adjusting unit for adjusting pressure of the COrefrigerant during defrosting; and a brine circuit as a first heating medium, in which the defrost system permits the COrefrigerant to naturally circulate in the closed circuit during defrosting by a thermosiphon effect.

Defrost system for refrigeration apparatus, and cooling unit

Growing community of inventors

Tokyo, Japan

Toshio Kutsuna