Patent ID: 8167922

Claim:
A cooling and warming blanket comprising: an upper layer and a lower layer, each of which layers includes a thin sheet made of plastic material, wherein each thin sheet further includes a cover layer and an inner layer, the upper and lower layers being combined together by high-frequency sealing so that the inner layers of the upper and lower layers are melted and integrated to form an interior space of the blanket; the interior space of the blanket including a liquid inputting area, a liquid outputting area, and a first channel, the first channel being positioned adjacent a first end of the blanket for disposing the liquid inputting area in fluid communication with the liquid outputting area so that liquid may flow from the liquid inputting area to the liquid outputting area through the first channel; a second end of the blanket opposite the first end of the blanket being provided with both a liquid inlet joint for conveying a liquid from an external source into the liquid inputting area and a liquid outlet joint for discharging liquid from the liquid outputting area to the exterior of the blanket; and the interior space further including a plurality of air chambers formed in both the liquid inputting and liquid outputting areas, and a second channel is provided between each two adjacent air chambers so that liquid conveyed from the liquid inputting area to the liquid outputting area also flows through the second channels, so that the external surface temperature of the blanket may be varied in correspondence with the temperature of the liquid being conveyed through the interior space of the blanket.