Gas water heater and method for preventing frost with water pump

Abstract

The invention discloses a gas water heater and method for preventing the frost with a water pump. The gas water heater for preventing the frost with the water pump comprises a heat exchanger, a combustor, a water inlet pipe, a water outlet pipe and a water outlet valve. The combustor is arranged below the heat exchanger. A water flow sensor is mounted on the water inlet pipe. The water outlet valve is arranged on the water outlet pipe. The water pump is arranged between the water flow sensor and the heat exchanger. The water inlet pipe communicates with the water outlet pipe through a circulating water pipe. One end of the circulating water pipe is arranged between the water outlet valve and the heat exchanger, and the other end of the circulating water pipe is arranged between the water flow sensor and the water pump. A circulating valve is arranged on the circulating water pipe. A first temperature sensor is arranged on the water inlet pipe. When the water temperature detected by the first temperature sensor is lower than the first temperature value, the water outlet valve is closed, the water pump is opened, the circulating valve is opened, and a circulating water passageway is formed; and the combustor is started to heat the heat exchanger. In this way, water in the water heater is circulated and heated by the water pump and the combustor, and the water passageway is prevented against the frost.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to a gas water heater and method using a water pump to prevent freezing. Background technique [0002] The basic working principle of the gas water heater is that cold water enters the water heater, flows through the water-gas linkage valve body, under the action of a certain pressure difference of the flowing water, pushes the water-gas linkage valve, and at the same time pushes the DC power micro switch to turn on the power and start the pulse At the same time, open the gas transmission electromagnetic valve, and continue to automatically re-ignite through the pulse igniter until the ignition is successful and enters the normal working state. Gas is used as the main energy source, and the high-temperature heat generated by the combustion of gas is transferred to the cold water flowing through the heat exchanger to achieve the purpose of preparing hot water. [0003] Some ar...

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Problems solved by technology

[0003] Some areas with low water pressure need to add a booster pump to meet the work of gas water heaters and user experience, but in cold areas, the water pump has no special protection in winter, and it is easy to freeze and crack. frozen, such as figure 1 As shown, the antifreeze heating resistance is generally used to heat the water pipe of the heat exchanger, but this can only be heated locally, and the flow of water cannot be realized, and the protection of the entire waterway cannot be realized.

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