Patent ID: 8375479

Claim:
An apparatus for recycling heat from waste water, the apparatus comprising: a tub having a bottom with a floor drain through which water is discharged, a side that is connected to the bottom and protrudes upward from the bottom to define a space, and a drain control unit that is formed around the floor drain and controls the water discharge of the floor drain; a heat exchange unit provided in the tub and having heat transfer pipes through which water to be supplied to a shower flows therein, the heat transfer pipes configured to transfer heat of waste water provided in the tub to the water to be supplied to the shower that flows through the heat transfer pipes; and an upper cover that covers an open upper portion of the tub and has drain holes to allow water flow therethrough, wherein the drain control unit has upper drain grooves configured to control a level of the waste water provided within the tub, wherein an upper portion of the drain control unit is in contact with a bottom of the upper cover, and wherein a height of a lowest part of the upper drain grooves is higher than the heat exchange unit.