Gas water heater and blocking protection method thereof

Abstract

The invention discloses a gas water heater. The gas water heater comprises a gas water heater body, a smoke discharging system part, a wind pressure sampling device, a wind pressure sampling device and a controller. The smoke discharging system part installed on the gas water heater body, The wind pressure sampling device which is connected with the smoke discharging system part in a connected mode, The controller which is connected with the wind pressure sampling device, and the controller is used for controlling the working start and stop of the gas water heater; The gas water heater is characterized in that the wind pressure sampling device comprises a flat-mouth wind pressure sampling nozzle and an electronic wind pressure switch, one end of the flat-mouth wind pressure sampling nozzleextends into a smoke discharging channel of the smoke discharging system part, the other end of the flat-mouth wind pressure sampling nozzle is connected with a negative pressure cavity of the electronic wind pressure switch, the signal output end of the electronic wind pressure switch is connected with the controller. According to the gas water heater, parameter adjustment and production of thesmoke discharge system part are facilitated, the parameter drift problem is improved, so that the gas water heater can be effectively protected from blocking, the wind resistance performance is improved. The invention further provides a gas water heater blocking protection method.

Description

technical field [0001] The invention relates to the technical field of fluid heaters, in particular to a gas water heater and a blocking protection method thereof. Background technique [0002] The existing gas water heater will perform blockage protection when the combustion condition is bad. When the pressure value of the sampling nozzle in the smoke exhaust system reaches the reset value of the mechanical air pressure switch, the air pressure switch will be disconnected, so that the water heater will stop working and perform blockage protection. . Most of the sampling nozzles installed in the current smoke exhaust system are oblique sampling nozzles, and the pressure value will change when the sampling nozzle is rotated slightly. It is difficult for the manufacturer to maintain consistency; in addition, the mechanical air pressure switch is controlled by a micro switch. , poor stability and prone to parameter drift. Combining the two factors, gas water heaters will expe...

AI Technical Summary

Problems solved by technology

When the reset point of the mechanical air pressure switch is too large, it will lead to early shutdown and poor wind pressure resistance; if the reset point is too small, it will cause yellow flames, flame overflow or blockage protection failure

like figure 2 As shown, when the smoke exhaust system is equipped with an oblique sampling nozzle, when the external wind pressure is too high and blockage protection is required, if the negative pressure of the sampling nozzle is too high at this time, it will cause yellow flames, flame overflow or blockage protection failure; if The negative pressure of the sampling nozzle is too small, which will lead to early shutdown and poor wind pressure resistance

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