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 housing, a rotating drum and a stepping drive mechanism, the housing is provided with a first air inlet and a nozzle, the rotating drum and the stepping The driving mechanism constitutes the blocking mechanism for blocking the nozzles. The rotating drum is located in the inner cavity of the housing and extends axially along the direction in which the nozzles are spaced apart. On the side wall of the rotating drum, there are at least two Each strip-shaped through-hole extends along the circumference of the drum and corresponds to a nozzle; the stepping drive mechanism drives the drum to rotate step by step, so that the strip-shaped through-holes rotate intermittently to the corresponding nozzle. In the present invention, a rotating drum is provided, and a strip-shaped through hole is opened on the rotating drum. Each nozzle corresponds to a strip-shaped through-hole. With the rotation of the rotating drum, different positions and different numbers of nozzles communicate with the strip-shaped through-hole correspondingly, so that Multiple nozzles can be opened at one time without opening one by one, 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...

AI Technical Summary

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 through the translation of a piston. In order to prevent 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 the gas flow rate The adjustment can only be realized by the movement of the one piston, and the piston or sealing ring is easy to wear, resulting in poor sealing; in addition, in order to make the piston or sealing ring move smoothly, lubricating grease is usually applied on the piston and sealing ring, but the grease is easy to Blockage of the nozzle; and, if the piston is worn out and loses its plugging effect, the gas flow regulation of the entire device fails

[0008] In addition, the drive mode in which the motor drives the gear to finally drive the screw rod to move is not accurate enough to control the movement stroke of the screw rod, resulting in the inability to accurately block the nozzle, and the cost of the motor is relatively high

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