A refrigerator, in which air blast fans in storage chambers are controlled so as to reduce a power consumption rate, and a control method of the refrigerator. Also disclosed is a logging tool equipped with a processor to implement the diffusion edited pulse technique. The vacuum holding means may be comprised of: a vacuum space on which the non-standard substrate is placed; a barrier means around the edge of the vacuum space that closes off the vacuum space and that makes a sealing contact with the non-standard substrate; and a means for exposing the vacuum space to vacuum. The outer sheath catheter includes an ablative outer surface for ablating tissue in contact therewith.