Fuel gas high efficiency water heater litre level changing method and variable litre level fuel gas high efficiency water heater

Abstract

In the casing of the gas rapid water heater is mounted a heat-exchanger with a water intake and a discharge tube. Under the heat-exchanger is set a combustion chamber, in which is mounted a burner connected with gas-distributing nozzles separately. A variable-speed fan is mounted under the combustion chamber. The gas-distributing nozzles are divided into at least two group of the gas-distributing nozzles is connected with the gas source separately through the air intake distributing valve. When used, by switching the air intake distributing valve, it is at least realized that the group with a smaller number of combustion nozzles is independent gas-fed for burning and the group with a larger number of combustion nozzles is also independent gas-fed for burning.

Description

technical field

[0001] The invention relates to a method for changing the rated parameters of a high-efficiency gas instant water heater, in particular to a method for changing its power, that is, a step-up conversion method, and also relates to a gas-fired high-efficiency water heater with variable rise, which belongs to the technical field of gas appliances. Background technique

[0002] According to the applicant's knowledge, the medium and low-grade gas instant water heaters currently on the market basically adopt segmented combustion technology. The output power of the water heater varies. In this way, the user can choose different power outputs (or firepower) of the water heater according to his demand for hot water when using the water heater.

[0003] Studies have shown that the thermal efficiency of this type of water heater can reach the maximum ideal state when it works under the rated power condition, but when it works under other power conditions, the thermal e...

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