Cold-hot separation device of water heater

The invention relates to the technical field of bathroom articles, and discloses a cold-hot separation device of a water heater. The cold-hot separation device of the water heater comprises a metal shell, an insulating layer wraps the outer side of the shell, a top column is fixedly connected to the inner top wall of the shell, the bottom of the top column is conical, the top column is positionedbetween two heating pipes and extends below a limiting block, a communication hole is formed in the outer side of the top column, the shape of the communication hole is I-shaped, and the distance between an upper opening and a lower opening is larger than the thickness of an isolating plate. According to the cold-hot separation device of the water heater, an isolating plate is arranged inside thewater heater, when the cold-hot separation device is used, the isolating plate is pushed upwards through the water pressure of tap water, hot water above the isolating plate is extruded out of the water heater, when the isolat