Fuel gas distribution device and combustion control method of water heater using same

Abstract

The invention relates to a fuel gas distribution device and a combustion control method of a water heater using the same. The fuel gas distribution device comprises a shell, a first electromagnetic valve, a second electromagnetic valve, a compartment and a cover plate, wherein a first distribution cavity and a second distribution cavity are arranged in the shell, a first gas inlet for fuel gas toenter the first distribution cavity and a second gas inlet for the fuel gas to enter the second distribution cavity are formed in the shell, first nozzles, second nozzles and third nozzles are sequentially arranged on the shell at intervals, the compartment is arranged in the first distribution cavity, the first nozzles and the second nozzles are separated, the first nozzles are enclosed in the compartment, the side wall of the compartment is provided with a through hole for air flow of the first gas inlet to enter the compartment, and the cover plate is positioned in the first distribution cavity, movably arranged at the position of the through hole and can generate position change relative to the through hole so as to open and close the through hole. Therefore, redundant heat in the firetransferring process can be reduced when sectional fire power from big fire to small fire is switched.

Description

technical field [0001] The invention belongs to the technical field of gas water heaters, and in particular relates to a gas distribution device and a combustion control method for a water heater using the aforementioned device. Background technique [0002] In order to realize a wide range of temperature regulation, the gas water heater generally adopts the three-stage combustion of the front pipe (ie, the gas distribution device), which is realized by the on-off of three solenoid valves. However, the three-stage front pipe needs to be used with three solenoid valves, and the cost is high, so there is a two-stage front pipe that cooperates with the opening and closing of two solenoid valves to achieve three stages (for example, 5:10:15 fire row quantity distribution) Combustion technology, as shown in "A Combustion Control Method for Gas Water Heater" disclosed in the Chinese invention patent application with the patent number CN201710059590.9 (publication number CN10733980...

AI Technical Summary

Problems solved by technology

[0004] However, the two-stage front pipe realizes the three-stage combustion technology. When the load decreases (when the water flow becomes smaller or the set temperature decreases), especially the second-stage fire (10 fire rows) is switched to the first-stage fire (5 fire rows) In the process of fire transmission, there must be a transition of three-stage fire (15 fire rows), and this change is contrary to the purpose of load reduction, so there will be a phenomenon that the temperature of water in one section exceeds the target temperature, and it will As a result, the water temperature is too hot when the user takes a bath, which affects the user experience

[0005] In addition, as shown in the "Gas Water Heater and Control Method" published in the Chinese invention patent application with the patent number CN201710893526.0 (publication number CN 109579262A), when the heat load of the water heater changes, the corresponding nozzle is controlled by the solenoid valve. The on-off of the gas at the place leads to a large number of solenoid valves, increased failure rate, high cost, and the large volume of the solenoid valve will also increase the overall volume of the water heater

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