Water heater control method based on wind pressure sensor and water heater

Abstract

The invention discloses a water heater control method based on a wind pressure sensor and a water heater. The method comprises the following steps that an actual air pressure value detected by the wind pressure sensor is obtained; whether the actual air pressure value is larger than or equal to a first preset air pressure value or not is judged, and if the actual air pressure value is larger than or equal to the first preset air pressure value, the water heater is controlled to work in a normal working mode; if the actual air pressure value is smaller than the first preset air pressure value, whether the actual air pressure value is larger than or equal to a second preset air pressure value or not is further judged, and the second preset air pressure value is smaller than the first preset air pressure value; and if the actual air pressure value is larger than or equal to the second preset air pressure value, the water heater is controlled to work in a first variable-lift mode, and a draught fan is controlled to work at a high-air-speed gear. By means of the water heater control method, the water heater can be more intelligently controlled to work according to air pressure changes.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a water heater control method based on a wind pressure sensor and the water heater. Background technique [0002] Gas water heaters generally use a dedicated fan to discharge the exhaust gas from the flue pipe. In order to ensure that the flue gas can be discharged smoothly, the existing gas water heater will be equipped with a wind pressure switch to detect the wind pressure in the flue pipe. If the pressure is low, the wind pressure switch will be disconnected, and the gas water heater will no longer work, which plays a role of safety protection. [0003] However, in the actual use of the wind pressure switch, there are the following problems: 1. There are differences in the smoke pipes of gas water heaters in each family, and the resistance of the smoke pipes is not the same. Some gas water heaters have large resistance due to the smoke pipes. The air pressure switc...

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Problems solved by technology

[0003] However, in the actual use of the wind pressure switch, there are the following problems: 1. There are differences in the smoke pipes of gas water heaters in each family, and the resistance of the smoke pipes is not the same. Some gas water heaters have large resistance due to the smoke pipes. The air pressure switch will continue to be off; 2. After the gas water heater has been used for a period of time, the fins of the water tank will accumulate dust, the wind power of the fan will attenuate, the air pressure in the smoke pipe will drop, and the air pressure switch will be disconnected; 3. The external environment changes, the wind will Due to the weather, the resistance of the smoke exhaust port of the smoke pipe increases, the wind pressure of the smoke pipe becomes smaller, and the air pressure switch is disconnected; 4. In order to expand the performance, a fan with two speeds of high and low speeds is designed, and a wind pressure switch cannot guarantee the wind pressure of changing speed Protection, some manufacturers directly cancel the wind pressure protection at low speed, resulting in a risky state without protection; 5. The performance drift of the wind pressure switch, the change of the performance of the diaphragm, etc., will also cause the wind pressure switch to malfunction

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