Matsushita Refrigeration Company

Toshiki Maeda

Ichiro Onishi

Kazuyoshi Takeuchi

Akira Yokoe

Yukio Morikawa

A defrosting heater in a refrigerator with a flammable refrigerant sealed therein, including a first glass tube () having a heater wire () inside thereof, a plug () covering both end opening parts of the first glass tube () and a second glass tube (), a lead wire () piercing the plug () and connected to an end of the heater wire (), and a positioning plate () disposed on a connection part of the lead wire () with the heater wire (). Flame propagation can be prevented by setting the size of a space () formed by the plug () and the positioning plate () according to the sealing quantity of the flammable refrigerant and the surface temperature of the heater wire (), and an unstable state in a defrosting mode is prevented even when the flammable refrigerant leaks.

Defrosting heater, and refrigerator having the defrosting heater

A defrost heater, in which the strength of an insertion force needed for inserting a second glass tube in a plug is specified to be smaller than that needed for inserting a first glass tube in a plug. Thereby, dispersion in the insertion force needed for attaching the plug with a double glass tube can be reduced, and the assembling efficiency is improved.

Growing community of inventors

Kawanishi, Japan

Toshiki Maeda