Hot water supply system with instantaneous pressure bearing

The utility model relates to a hot water supply system with instantaneous pressure bearing. A water inlet valve is arranged on a water inlet pipe of a hot water storage tank, the hot water storage tank is provided with an electromagnetic valve (or an exhaust valve) which can be communicated with the atmosphere, a water flow switch which can detect the flow of liquid is also arranged on an output pipe of a water mixing valve and is electrically connected with a controller, and then the controller is respectively and electrically connected with the water inlet valve and the two-position three-way electromagnetic reversing valve (or the exhaust valve), so that the system is in a non-pressure-bearing state communicated with the atmosphere when the system does not supply hot water; and when the system supplies the hot water, the system is in a pressure-bearing state. The hot water supply system with instantaneous pressure bearing integrates the advantages of a pressure-bearing type hot water supply system and a no