Gas water heater control system conducting adjustment according to gas secondary pressure

Abstract

The invention discloses a gas water heater control system conducting adjustment according to gas secondary pressure. The gas water heater control system comprises a master controller, and further comprises a secondary pressure sensor, a gas proportional valve and an operation display, all of which are connected with the master controller. The secondary pressure sensor is arranged behind functions of two switch stop valves of a square pipe and used for detecting gas secondary pressure, and the master controller stores gas secondary pressure values corresponding to different load states of a gas water heater. Under a certain load state, when it is detected that the secondary pressure is too high, the master controller controls the aperture of the gas proportional valve to be reduced; when the secondary pressure is too low, the master controller controls the aperture of the gas proportional valve to be increased; and when the secondary pressure is not detected, a user is reminded of whether a gas valve is opened or not through the operation display. According to the gas water heater control system conducting adjustment according to the gas secondary pressure, the secondary pressure sensor is additionally arranged behind the functions of the two switch stop valves of the square pipe, introducing of new device newly-increased fault points is avoided, and when gas leakage happens by accident, it can be guaranteed that a gas passageway is effectively closed.

Description

Technical field [0001] The present invention relates to the technical field of gas water heater control, in particular to a gas water heater control system adjusted according to the secondary pressure of gas. Background technique [0002] The parameters of the existing gas water heater are calculated according to laboratory test data or calculated to obtain the maximum and minimum gas consumption values ​​of the gas water heater. The opening degree of the gas proportional valve and the corresponding current value are determined through testing, but there are fluctuations in the resistance of the gas proportional valve coil and the output current of the main board, causing abnormal fluctuations in output gas consumption, easily causing resonance or incomplete combustion. If the gas pressure of the user's home is reduced, the gas pressure cannot be sensed and adjusted, and the preset temperature cannot be reached when the gas pressure is too low. In addition, the existing gas wate...

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Problems solved by technology

Installing a pressure sensor before the main switch valve will increase the risk of gas leakage. In the event of an accidental gas leakage, the gas passage cannot even be effectively closed, posing a safety hazard.

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