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

Abstract

The invention relates to a gas distribution device and a gas water heater using the device, wherein the gas distribution device includes a shell on which at least one first air inlet is arranged; at least two nozzles are arranged at intervals on the side wall of the shell ; The blocking mechanism includes a blocking member, a rotating shaft, a power mechanism and a drive block group. There are at least two blocking members and each blocking member corresponds to a nozzle; the rotating shaft extends axially along the direction in which the nozzles are arranged; The driving shaft rotates around its own axis; there are at least two groups of driving blocks and they are arranged on the rotating shaft at intervals along the axial direction, and each group of driving blocks drives a blocking member correspondingly. Each drive block protrudes radially from the rotating shaft towards the set drive block. Each nozzle of the gas distributing device of the present invention corresponds to a blocking member, and the blocking members are driven correspondingly in different positions and in different numbers as the rotating shaft rotates, and the gas flow adjustment method is convenient, quick and flexible.

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, this patent opens the nozzles in sequence from right to left through the translation of the piston, that is, the nozzles can only be opened or closed one by one, and cannot be opened or closed multiple times at one time, so the adjustment of the gas flow is not flexible and convenient; in addition, because The number of different nozzles can be opened by the translation of a piston. In order to prevent the gas from entering the nozzle on the left side of the piston from the piston or sealing ring, there must be no gap between the outer wall of the piston or the sealing ring and the inner wall of the gas main pipe, and only one piston The piston and sealing ring move to control the number of nozzles participating in the combustion. The piston and sealing ring will be worn after long-term use, resulting in a gap between the piston or sealing ring and the gas main pipe, poor sealing performance, and inaccurate adjustment of gas flow; 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; and if the piston is worn out and loses its sealing effect, the gas flow regulation of the entire device will fail

[0008] In addition, the method of opening the nozzles in sequence makes the fire power concentrated in a certain area, resulting in uneven combustion on one side of the heat exchanger, local high temperature problems, condensed water, and accelerated aging in parts with high frequency of use; in addition , the gas needs to be mixed with air to carry out the combustion reaction, and the air inlets supplying the air are evenly distributed. When burning on one side, the fresh air on the other side does not participate in the combustion, but is directly discharged through the heat exchanger. Outdoor, reducing the thermal efficiency when burning on one side

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