Abstract: A refrigerator includes a casing including storage compartments, doors attached to the casing to expose or cover the storage compartments, hinges connecting the doors to the casing and supporting the doors so that the doors are openable and closable, electrically non-conductive hinge covers detachably attached to the casing and covering the hinges, and a wireless adapter disposed on the hinge cover and including an antenna unit configured to transmit and receive radio waves.

Abstract: A power management system includes a plurality of electric devices including a refrigerator, and a centralized controller configured to control the plurality of electric devices. The centralized controller includes difficulty determination means configured to determine power supply difficulty as a degree of difficulty in supplying power to the plurality of electric devices. Meanwhile, the refrigerator includes: a control setting table in which a plurality of power reduction controls that reduce use of power are stored to be associated with the power supply difficulty; reduction control setting means configured to set the power reduction control to be executed, by using the control setting table and the power supply difficulty determined by the difficulty determination means; and a device controller configured to perform the power reduction control set by the reduction control setting means.

Abstract: A refrigerator includes a casing including storage compartments, doors attached to the casing to expose or cover the storage compartments, hinges connecting the doors to the casing and supporting the doors so that the doors are openable and closeable, non-conductive hinge covers detachably attached to the casing and covering the hinges, and a wireless adapter disposed on the hinge cover and including an antenna unit configured to transmit and receive radio waves.

Abstract: A storage compartment, operation display means configured to display a plurality of power saving levels each indicating a power saving index and to accept an operation input of selecting one power saving level from among the plurality of power saving levels, and control means configured to, when an operation input of selecting one power saving level from among the plurality of power saving levels displayed on the operation display means is made, calculate one or a plurality of power saving plans regarding a target temperature for the storage compartment in accordance with the selected one power saving level, are included. The operation display means displays the power saving plans calculated by the control means and accepts an operation input of executing the power saving plan.

Abstract: A power management system includes a plurality of electric devices including a refrigerator, and a centralized controller configured to control the plurality of electric devices. The centralized controller includes difficulty determination means configured to determine power supply difficulty as a degree of difficulty in supplying power to the plurality of electric devices. Meanwhile, the refrigerator includes: a control setting table in which a plurality of power reduction controls that reduce use of power are stored to be associated with the power supply difficulty; reduction control setting means configured to set the power reduction control to be executed, by using the control setting table and the power supply difficulty determined by the difficulty determination means; and a device controller configured to perform the power reduction control set by the reduction control setting means.

Abstract: The present invention is to realize supercooled freezing as a method of enhancing the quality of frozen food with a simple arrangement by a method other than quick freezing. Further, the present invention is to obtain a refrigerator and a frozen food preservation method capable of realizing high quality freezing by a simple arrangement. The refrigerator, which stores food making use of the cold air generated by a cooler 3, includes a supercooling case 81 for keeping the stored food in a supercooled state, in which the food is not frozen even at a temperature equal to or less than the freezing point of the food, for at least a predetermined period of time. The supercooling case 81 is composed of, for example, a lower case of two-stage type upper and lower cases disposed in a switching chamber 200 capable of being switched to a plurality of temperature zones.

Abstract: An electric lamp which is almost free from an illumination trouble due to breakage of filaments is composed of a light transmitting bulb, a bulb base equipped with a pair of inner terminals and a pair of outer terminals, and a linear light emitting means composed of plural filaments extended in parallel with each other between the inner terminals, in which at least one filament and the other filament are disposed oppositely to each other and shielded from each other with a light transmitting shielding plate.