Full pre-mixing combustion type gas cooker

Abstract

The invention relates to a full pre-mixing combustion type gas cooker, which comprises a direct current fan, a controller, an electric control type gas proportional valve, a fan rotation speed sensor and a combustion device, wherein the combustion device is used for fully mixing gas and air, and is connected with the fan and the gas proportional valve, the fan rotation speed sensor is arranged on the fan, and the controller is electrically connected with the fan rotation speed sensor, the fan and the gas proportional valve, and is used for synchronously adjusting the gradual increase and / or reduction of current of the fan and the gas proportional valve according to the signal of thefan rotations peed sensor The gas cooker has the advantage that on the basis of realizing full pre-mixing combustion, the cost of products is effectively reduced.

Description

technical field [0001] The invention belongs to the field of gas appliances, in particular to a fully premixed combustion gas appliance, and is especially suitable for the fields of gas water heaters, gas wall-hung boilers, gas stoves and the like. Background technique [0002] Taking domestic gas water heaters as an example, in the prior art, most of its combustion devices adopt a partial premixed combustion method, that is, the gas is only mixed with part of the primary air before combustion, and additional secondary air is required during the combustion process. Because the distribution of primary air and secondary air is difficult to meet the needs of complete combustion of gas, the amount of air supplied is usually greater than the amount of air required for theoretical combustion. The excess air will reduce the flame combustion temperature and cause heat loss; at the same time, due to Incomplete combustion of gas will cause CO, NO in flue gas after combustion X Such a...

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Problems solved by technology

Because the distribution of primary air and secondary air is difficult to meet the needs of complete combustion of gas, the amount of air supplied is usually greater than the amount of air required for theoretical combustion. The excess air will reduce the flame combustion temperature and cause heat loss; at the same time, due to Incomplete combustion of gas will cause CO, NO in flue gas after combustion X The high content of other gases will lead to air pollution, which does not meet the requirements of environmental protection

[0003] In addition, there are a few fully premixed combustion gas water heaters in foreign brands, and their control methods are realized by high-pressure fans and pressure-controlled proportional valves. This control method will lead to a high cost of the whole machine, making many domestic combustion appliances Manufacturers are discouraged, and products are difficult to popularize

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