Portable constant temperature device for blood filtration replacement liquid

The utility model discloses a portable blood filtration replacement liquid constant temperature device which comprises a heat insulation bag body, a hot water layer body is arranged in the heat insulation bag body, and a water storage cavity is arranged in the hot water layer body. One end of the water injection opening is communicated with the water storage cavity, the other end of the water injection opening penetrates out of the heat insulation bag body and is used for injecting hot water with proper temperature into the water storage cavity, and a first sealing device capable of closing the water injection opening is arranged on the water injection opening. One side of the heat insulation bag body is provided with a placing opening for placing a replacement liquid bag containing replacement liquid into the inner side of the hot water layer body, and the heat insulation bag body is further provided with a connector for a liquid outlet pipe of the replacement liquid bag to stretch out. The hot water layer b