A gas distribution device and a gas water heater using the device

Abstract

The invention relates to a gas distribution device and a gas water heater using the device, wherein the gas distribution device includes a casing, a nozzle and a sealing mechanism, the casing is provided with a first air inlet and at least two nozzles, and the blocking mechanism includes There are a rotating shaft, a power mechanism for driving the rotating shaft, and a blocking member. There are at least two blocking members and they are arranged on the rotating shaft at intervals along the axial direction. Each blocking member covers a nozzle correspondingly. In the corresponding state, the corresponding nozzle is covered by the blocking member, and when the rotating shaft rotates to the state where the blocking member and the nozzle are staggered, the inlet end of the nozzle communicates with the first air inlet. There are multiple blocking parts in the present invention, and each blocking part corresponds to a nozzle. Even if the sealing performance of one of the blocking parts decreases, the other blocking parts can still work normally, and the gas flow can still be adjusted, which is fault-tolerant High rate.

Description

technical field [0001] The invention belongs to the technical field of fluid heaters with heat generating devices, and in particular relates to a gas distribution device and a gas water heater using the device. Background technique [0002] There is a defect in the use of gas water heaters or wall-hung boilers, that is, in summer, even if the gas is adjusted to the minimum gas supply, the water temperature is still too hot when showering, and the water temperature is not hot enough in winter. In order to solve the aforementioned problems, many manufacturers have adopted gas distributors (also known as gas sectionalizers or front pipes), that is, control valves are used to control the combustion of different nozzles on the gas distribution pipes, so as to achieve the size of the combustion firepower of water heaters and improve the efficiency of water heaters. range of adaptation. [0003] As shown in "A Gas Water Heater" disclosed by the Chinese Utility Model Patent No. ZL2...

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Problems solved by technology

[0004] The defects of the above-mentioned patents are: the number of stages that can be adjusted for combustion firepower is small (that is, the firepower adjustment level is small), and the adjustment gradient is too large, the control of the gas flow is not precise enough, and it is still easy to cause the minimum water temperature to be too high or the maximum water temperature to be too low phenomenon, it is difficult to meet the problems of regional differences, seasonal differences, and individual differences of people, which affects the comfort of users; in addition, the solenoid valve is large in size and high in cost. Considering the internal space and cost of the water heater, the existing gas flow distribution The device also needs to be further improved

[0007] However, the defects in this patent are: 1. Open the nozzles sequentially from right to left through the translation of the piston, that is, the nozzles can only be opened or closed one by one, but not multiple at one time, so the adjustment of the gas flow is not flexible enough 2. Because the opening of different nozzle numbers is realized through the translation of a piston, in order to prevent gas from entering the nozzle on the left side of the piston from the gap between the piston or sealing ring and the gas main pipe, the outer wall of the piston or sealing ring needs to be There is no gap between the inner wall of the gas main pipe, and only one piston and sealing ring move to control the number of nozzles participating in the combustion. The piston and sealing ring will wear out after long-term use, resulting in a gap between the piston or sealing ring and the gas main pipe , the adjustment of the gas flow is not accurate enough, which leads to the failure of the gas flow regulation of the whole device; in addition, in order to make the piston or sealing ring move smoothly, lubricating grease is usually applied to the piston and sealing ring, but the grease is easy to block the nozzle; 3. Need to set Screw rod, piston, sealing ring and other components, involving many parts

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