Abstract: A heating cooker for commercial use is provided in which heating control is conducted based on cooking parameter according to each cooking menu and an unauthorized user is prevented from changing the cooking parameter easily. In the heating cooker, cooking parameter can be changed only when a password is entered. Moreover, a user's administration level is determined by the entered password and information which can be changed is selected according to the user's administration level. The password entry can be carried out not only in an operation display panel provided with the heating cooker but in a remote central monitoring system which operates the heating cooker from a distant place.

Abstract: A heating cooker for commercial use is provided in which heating control is conducted based on cooking parameter according to each cooking menu and an unauthorized user is prevented from changing the cooking parameter easily. In the heating cooker, cooking parameter can be changed only when a password is entered. Moreover, a user's administration level is determined by the entered password and information which can be changed is selected according to the user's administration level. The password entry can be carried out not only in an operation display panel provided with the heating cooker but in a remote central monitoring system which operates the heating cooker from a distant place.

Abstract: The present invention is related to an ink jet head comprising a substrate having a support, an intermediate layer provided on said support and a lower layer provided on said intermediate layer, and a heat energy generating member which generates heat energy to be utilized for discharging ink provided on said substrate. The ink jet head is characterized in that ink channels communicated to discharge openings for discharging ink are formed corresponding to the heat generating portions of said heat energy generating member on said heat generating substrate, and the thermal conductivity of said intermediate layer is selected higher than that of said support and higher than that of said lower layer.

Abstract: A liquid jet recording head comprising a liquid emitting port for liquid emission and liquid paths communicating with said liquid emitting port, wherein said liquid paths comprise a main liquid path and a subsidiary liquid path, wherein said main liquid path is provided with an energy generating member positioned along said main liquid path and adapted for generating energy to be utilized for liquid emission, and wherein said subsidiary liquid path communicates with said main liquid path in the downstream side thereof including the position of said energy generating member.