DE1909764A1 - Low water protection for a gas-heated water heater - Google Patents

Description

Junkers 4-53

PLI-Mö / Kr

February 21, 1969

JUNKERS ft CO, GMBH, in Wernau / Ne clear Low water alarm for a gas-fired one Water heater

The invention relates to a low water alarm for eioh a gas-fired water heater whose Hoohdruok and Hisderdruokkanmer are separated from each other by a Meabran, which has a membrane plate that diohts and slides out of the housing of the Wassernangelsiohorung Outgoing pin old is connected to the base of a gas safety valve.

WMsermangel fuses of the kind described are already in place known. Kit will help dss membrane holder and pen The ton dsr pressure difference occurring in the two pressure chambers which are separated by the diaphragm, the adjustment movement of the diaphragm generated is transferred to the base of the Gassioherhelts-τentllο. So far it has been Ublioh, the membrane plate and to manufacture the pin connected to the diaphragm plate as separate parts

009837/0926 _BAD orig.nal

relatively expensive, high-quality alloy steel used to form a corrosion dieaea Stiftea with security verMnäern which the WassaCTiangelsicherung is mounted with leaktight sliding in a passage of the housing, so an absolutely clean korroeionsfreie surface must have.

The invention is based on the object, the device for transmitting the adjustment movement of the diaphragm Low-water protection is cheaper in terms of their production and at the same time one increases operating safety to obtain.

This object is achieved in a Wagsernangelsichening exercises of the type initially mentioned according to the invention in that the diaphragm plate and the pin are in one piece and are made of plastic. This significantly simplifies the manufacture of these motion transmission parts. Because the pen is made of plastic, there is no sur eir »<? Cost savings achieved through cheaper material, but a plastic stick has more favorable G-IaI properties compared to a rubber seal, in particular a Q-ring, with which the contact point of the pin is sealed from the housing, than a metal pin. The friction between the pin and the seal is reduced and thereby the sensitivity of the water shortage protection device is increased. Preferably, according to the invention, it is also provided that at the transition point the pin in the menstrual plate is formed into a base area, from where reinforcement ribs arranged radially with the same angle extend on the upper side of the membrane plate.

The object of the invention is based on the drawing in an Aucführuiigeboitpiel explained.

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Fig. 1 let a thematic representation of a known water shortage alarm;

Pig. 2 shows, in side view, partially cut along a central plane, the diaphragm plate and FIG the pin integrally connected with this;

Flg. 3 is a plan view of the diaphragm plate and FIG Pen as shown in Figure 2,

The according to Figure 1 generally designated by the reference numeral 10 is by a membrane 11 in a High pressure chamber 12 and a low pressure chamber 13 divided. The membrane 11 is a membrane plate 14 with a pin 15 assigned, its outer free end with the closing link a non-illustrated gas safety valve Krafteohlüesig is connected, so dates a movement of the membrane 11 on the Sole closing member of the gas safety valve is transmitted.

The motion transmission organ shown in Figures 2 and 3, which is made in one piece and made of plastic consists, has a circular and on its underside flat membrane plate 14 and one coaxially on the top of the diaphragm plate 14 and arranged in one in FIG not shown way out of the housing of the water shortage fuse 10 led out pin 15, whose conical end 151 on the YentilatSssel of the closing element of a gas, shown in FIG. safety valve * acts.

The diaphragm plate 14 lies with its flat underside 141 on the membrane 11 of the low water protection device 10. At the transition point between the pin 15 and the diaphragm plate 14 is on the top of the diaphragm plate 14 a sookel

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Junkers 455

like Voreprung 142 provided, by themselves four Reinforcement B-ribs arranged radially at the same angular distance 143 to the surface of the diaphragm plate 14 extend and stiffen the diaphragm plate 14 against undesired deformation.

Membrane plate 14 and pin 15 are aweckraäseig in the injection molding process manufactured. The fora can be chosen in this way be that the pin 15 in an undivided lormabsehaitt is made weakly conical, so that on its outside ^ side no burr formation occurs. Bio slight taper of the Pin 15 is due to the elasticity of the * sighting at the Durchftthrungsetelle of the pin 15 from the housing of the Water shortage protection 10 compensated without difficulty and impaired the Verstellesapfindllohkeit of water shortage 10 not.

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BATH

Claims (1)

Junkers Claim ©! Low-water safety device for a gas-heated water heater, the high-pressure and JJiedardruok chambers of which are separated from each other by a membrane, which has a membrane plate which is connected to the base of a 6 "e-8 safety valve by a pin which is tightly and displaceably guided out of the housing of the low-water safety device , since d. urchge -k β η η ζ ei ch η et that the diaphragm plate (H) and the pin (15) are in one piece and made of plastic. * Water shortage protection naoh claim 1, thereby g s know that at the transition point of the pin (15) into the brass plate (H) a Sockslboreioa (142) is formed, τon which Veret & dkmgsripptn (143) on the upper side of the Membrane tllers (14) extend. 009837/0926 bad ühisinal L e r s e i t e