Four-section proportional valve for gas water heater

Abstract

The invention discloses a four-section proportional valve for a gas water heater. The four-section proportional valve is characterized by comprising a valve body, an air inlet formed in the valve body, a normally-open air outlet communicated with the air inlet, a first sectioning air outlet and a second sectioning air outlet. A proportional valve and a stop valve are arranged on the air inlet. The first sectioning air outlet and the second sectioning air outlet are provided with a first sectioning valve and a second sectioning valve respectively. Compared with the prior art, the four-section proportional valve has the advantages that the two sectioning air outlets and one normally-open air outlet are arranged, and four-section control over gas can be achieved just by simple arrangement and combination; the four-section proportional valve is simple in structure, convenient to control and beneficial to wide-range adjustment of the gas amount; meanwhile, the proportional valve is arranged on the air inlet so that the gas amount at the normally-open air outlet can be freely adjusted; proportion adjustment is convenient, so that fire transfer faults and incomplete combustion in the sectional adjusting process are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a four-section moving magnet proportional valve applied to gas water heaters. Background technique [0002] At present, most of the automatic control gas appliance products sold on the market are driven by the controller to provide current to drive the gas proportional valve, and the maximum and minimum current are realized by the software of the controller. However, with the continuous improvement of living standards, people have also put forward higher and higher requirements for the working temperature of gas appliances. It is sometimes difficult to simply adjust the gas ratio to meet the user's requirements for a larger temperature range. [0003] For this reason, some people in the industry proposed to control the gas in sections, and achieve the purpose of a larger temperature range by heating in sections. For example, a Chinese patent with the publication number CN1019568...

AI Technical Summary

Problems solved by technology

However, this gas sectional valve will require multiple solenoid valves, which has a complex structure and is extremely inconvenient to control

In addition, since there are only two segmented gas outlets, only three-stage control can be performed, which is difficult to meet the water heater's water comfort requirements, and it is also difficult to adjust the ratio, which is not suitable for gas water heaters

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