Abstract
The article presents new technical solutions aimed at improving the efficiency of the water-gas unit of gas water heater. Based on the analysis of various units widely used for domestic water heating, the main disadvantage of water and gas unit is revealed. It is the mechanical connection of the membrane with the gas supply valve, which is carried out through the gland between the gas and water chambers of each unit. This design feature leads to frequent failure of gas water heater due to the fragility of the gland. It is accompanied by material losses and the risk of gas leak. The paper proposes a new design scheme of the water-gas unit, in which the mechanical connection between the membrane and the valve is replaced by a connection realized with the magnetic field of two disk magnets. The magnets are oriented with respect to each other by the same poles and are located on both sides of the non-magnetic partition, separating chambers of the water and gas unit. In the proposed water-gas unit, water and gas leaks are excluded, since it does not contain gland seals. A lack of friction in the transmission of force from the membrane to the gas supply valve increases the accuracy of the valve. The stability of the water supply limitation threshold is also increased. The method for calculating the main geometric and power parameters of water-gas unit of the developed structure is proposed. It involves the use of experimentally removed dependence of the force of magnets repulsion on the distance between their poles.
Highlights
The article presents new technical solutions aimed at improving the efficiency of the water-gas unit of gas water heater
Based on the analysis of various units widely used for domestic water heating, the main disadvantage of water and gas unit is revealed
It is the mechanical connection of the membrane with the gas supply valve, which is carried out through the gland between the gas and water chambers of each unit
Summary
Поэтому для исключения влияния процессов изнашивания сальникового уплотнения на работоспособность оборудования была разработана принципиально новая конструкция водогазового узла, в котором связь между клапаном подачи газа и мембраной осуществляется через магнитное поле двух магнитов [12]. При этом клапан 11 ограничения подачи воды полностью открыт, а клапан 14 подачи газа под действием пружины 13 закрыт. В результате давление в полости 7 будет уменьшаться с увеличением подачи и, когда подача достигнет минимально допустимой для данной колонки, мембрана 5 под действием разности давлений с обеих её сторон преодолеет сопротивление пружины 12 и начнёт перемещаться справа налево. 7. Задавшись из конструктивных соображений расстоянием между клапаном и рабочим полюсом магнита С, расположенного в газовой камере, равным 15 мм, можно определить координату рабочего полюса магнита LГМ2 при открытом клапане:. В табл. 1 приведены соответствующие экспериментальные зависимости [18]
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