Patent ID: 9353899
Filing Date: 2016-05-31
CPC Classification: F16L,G05D,Y10T

Claim Text:
1. A water hammer recognizing and energy saving water hammer prevention system comprising: a plurality of contact switches or a level sensor part mounted inside an air chamber so as to sense a level variation ΔH and a pressure sensor part mounted inside the air chamber so as to sense a pressure variation ΔP; and a controller adapted to compare the level variation ΔH and the pressure variation ΔP with reference values ±Hr, ±Pr and set values ±Hs, ±Ps inputted through a control panel so as to recognize the occurrence of water hammer and thus to control an air compressor and an exhaust valve in accordance with the recognized result so as to reduce the water hammer in a main pipe, wherein under the control of the selective on/off operations of a plurality of pumps so as to control the capacity of the main pipe in accordance with the change of the use environment, if the pressure variation ΔP and the level variation ΔH sent from the pressure sensor part and the level sensor part are within the ranges of the reference values ±Pr, ±Hr during set time T, a normal mode is recognized through the controller, and if the pressure variation ΔP and the level variation ΔH are within the ranges of the set values ±Ps, ±Hs during the set time T, a safe mode is recognized through the controller, so that in case of the normal mode or the safe mode, the exhaust valve and the air compressor connected to the air chamber are operated to a set state, and in case of the deviation from the safe mode, if the pressure variation ΔP is higher than the set value Ps and the water hammer is recognized by comparing pressure wave reaching time μ with the set time T, the operation of the exhaust valve or the air compressor stops to adjust the pressure and level of the air chamber.