FLOWTECH CO., LTD. Patent applications |
Patent application number | Title | Published |
20130160862 | PRESSURE-TANK WATER-LEVEL CONTROL METHOD IN A PIPING SYSTEM USING A LEVEL TRANSMITTER AND A LEVEL SWITCH - Disclosed herein is a method of controlling a water level of a pressure tank of a piping system. The piping system includes the pressure tank, a level transmitter, a first level switch disposed on a low-level-alarm line, a second level switch disposed between the low-level-alarm line and a lower limit line of an optimal level range, a third level switch disposed between a high-level-alarm line and an upper limit line of the optimal level range, and a fourth level switch disposed on a high-level-alarm line. The method includes receiving a level measurement value from the level transmitter; receiving and checking ON/OFF signals of the level switches; comparing the level measurement value with the ON/OFF signals; determining whether an abnormality has occurred in the level transmitter, and determining whether to raise or lower the water level; and supplying gas to the pressure tank or exhausting gas therefrom. | 06-27-2013 |
20130025696 | METHOD FOR CONTROLLING PRESSURE KEEPING FACILITY FOR COOLING AND HEATING SYSTEM PROVIDED WITH PLURALITY OF SENSORS - The present invention relates to a method of controlling pressure maintenance equipment for a cooling and heating system. More particularly, the present invention relates to a method of operating and controlling, under optimum conditions, pressure maintenance equipment with multiple sensors so as to check for irregularities in the sensors which measure the same physical parameter. In the present invention, measurement values of two or more sensors are used to detect whether an abnormality has occurred in any sensor. If a sensor is determined to be abnormal, a measurement value of the abnormal sensor is excluded when determining a reference control value. Thereby, the pressure can be precisely and reliably controlled in response to actual conditions of the system. | 01-31-2013 |