DE1950822A1 - Water fitting for a gas-heated instant water heater with a low water protection device - Google Patents

Description

Junkers 499 PLI-Fu / Fi October 8, 1969

JUNKERS & CO. GMBH, in Wernau / Neckar

Water fitting for a gas-heated instant water heater with a low water alarm

Addendum to patent ....... (patent application P 19 413 84.4)

The invention relates to a water fitting for a gas-heated instantaneous water heater with a low water protection device, whose water space is divided into a high-pressure chamber and a low-pressure chamber by a membrane, with am peripheral circumference of the housing part on the high pressure side, one connection piece each for one with the high pressure chamber in connection standing cold water supply line, for one of the high pressure chamber from the cold water pipe leading to the heat exchanger of the water heater, for hot water arriving from the heat exchanger! ei tung, for something related to the latter Hot water nozzle and for one with the cold water supply line connected cold water tap and also on the front of the high-pressure side housing part one in connection with the two dispensing valves upright connection piece for a water outlet pipe

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are arranged, at which the hot water outlet temperature can be selected by changing the amount of cold water flowing to the heat exchanger by means of a quantity setting device controlling a _{bypass channel from the high pressure chamber;} .. whose operating spindle is radial to the high pressure chamber, between the, ,, be id-en .. Zapf yjenti? lfehv is seen before gve, whose connection is done ζ e ^ ir with. symmetrical distance and parallel to the longitudinal axis of the operating spindle · are arranged, the two nozzle valves, each with one inside their connecting pieces The closing element is provided so that it can be displaced in the axial direction, for the displacement of which a cam bushing is provided with control cams projecting on a common circular line in the axial direction and the cam bushing is arranged coaxially to the operating spindle of the quantity adjustment device so that it can be swiveled but cannot be displaced in the axial direction, according to the patent. .... (patent application P 1v9 41 3Ö4 «4).

This water fitting proposed by the main patent has two concentrically arranged handles on the one hand by pivoting a handle designed as a pivot lever to open the cold water or hot water tap and on the other hand by turning the operating handle xLie the quantity setting device to control.

It has now been found that both functions with a single Handle can be accomplished.

The solution consists of a water fitting for a gas-heated one Continuous water heater of the type mentioned according to the Invention is that both the cam bushing to open the cold water or hot water dispensing valve as well as the operating spindle of the quantity adjustment device by means of a ring-shaped actuating handle are rotatable, which concentrically around a cylindrical head of the

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'.' Control mirror arranged and aii his grip neck mxt. a guide bushing is blown open, which together with the actuating handle on the adjusting bushing of the quantity adjustment device can be rotated and counteracted in an axial direction. the action of a coupling spring is displaceably mounted, by means of which the actuating handle is coupled to the control bushing and the control cam bushing in an external position limited by an Aaschlagflattsch ött of the control bushing via a toothing gswischenyder the guide bushing, whereas this coupling can be released by axially displacing the actuating handle and the latter The operating spindle is coupled to the operating spindle via a toothing which engages during the axial displacement between the operating handle and the head of the operating spindle. .

In a preferred embodiment it is provided that the guide bUGhae is pot-shaped and has a bottom cutout on the adjustment sleeve of the quantity adjustment device is postponed and arranged against the Änschlagfiansch under the action of the coupling spring.

Furthermore, in the preferred embodiment, the training made so that the cam bushing with one of the guide bushing the sleeve surrounding the operating handle which is provided with an internal gear rim to which an external gear ring is assigned on the guide bush *

It is also provided that the operating handle with a Internal gear rim is provided, which an external gear ring on Head of the operating spindle is assigned.

In this way, with a single operating handle, both the operation of the nozzles and after moving the The setting of the volume setting device and thus created the temperature of the leaking water. In addition, the cylindrical head of the operating spindle fits into the ring-shaped head that surrounds it concentrically

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Operating handle harmoniously with the overall appearance of the front of the instant water heater. ,

The object of the invention is based on one in the drawing schematically illustrated embodiment explained in more detail. Show it!

1 shows a section through one according to the invention trained water faucet;

FIG. 2 is a plan view of the water fitting according to FIG.

The water fitting consists essentially of a known one Wassermangelsicherung.10, whose water space is divided by a membrane 11 into a high pressure chamber 12 and a low pressure chamber 13. The water shortage fuse 10 has a high-pressure side housing part 14 and a lower pressure side Housing part 15, between the abutting edges of which the membrane 11 is clamped. At the peripheral circumference of the On the high-pressure side housing part 14, various connection pieces are arranged, namely a connection port 141 for one Cold water supply line in which a sieve 16 is inserted. The connecting tube 141 is connected to the high pressure chamber 12 of the Low water alarm 10 in connection, wherein according to the illustrated Embodiment of the transition between the connection piece 141 and the high pressure chamber 12 of the low water alarm 10 by a known per se and generally with the reference number 17 designated water flow regulator is formed, which with one end against the high pressure side of the membrane 11 is supported. On the low-pressure side of the diaphragm 11 there is a diaphragm plate 18 with a diaphragm plate pin / 181 connected to it, which through a connection piece 151 on the Low-pressure side housing part 15 of the water shortage protection is passed through sealed to the outside and in per se known Way of controlling a gas safety valve, not shown diejr ^ q ^ ^ m ^ on ^ high pressure side

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Housing part 14, a further connection socket 142 is provided for a cold water line, which leads from the high pressure chamber to the heat exchanger, not shown, of the water heater. In the opposite direction, a further connection socket is arranged for a hot water pipe arriving from the "heat exchanger. In addition, a connection piece 144 for a hot water remote tapping pipe can be provided. Furthermore, a connection piece 145 is provided for a hot water pipe that is in connection with the hot water pipe coming from the heat exchanger of the water heater. The dispensing valve and a connection piece 146 are provided for a cold water dispensing valve connected to the cold water supply line, the arrangement of which will be described below provided, at which the hot water outlet temperature can be selected by changing the amount of cold water flowing to the heat exchanger by means of a quantity adjusting device generally designated by the reference numeral 19. The longitudinal axis of the operating sp indel 191 of the quantity setting device 19 is directed radially to the high pressure chamber 12 of the water shortage protection device 10 and the connection piece 145 for the hot water tap valve and the connection piece 146 for the cold water tap valve are aligned with a symmetrical distance and parallel to the longitudinal axis of the operating spindle 191 of the quantity setting device 19, according to In the illustrated embodiment, the axis of the operating spindle 191 to the axes of the connecting pieces 145 and 146 of the dispensing valves lie in planes offset from one another. The two dispensing valves for hot water and cold water are each provided with a closing element which can be displaced in the axial direction within their connecting pieces 145 and 146, respectively. In the embodiment shown, both the hot water tap valve, generally designated 21, and the cold water tap valve, generally designated 22, are each designed as a piston valve, the piston 211 or 221 of which is _{"eingachoberi" into the connecting pieces 145 or rt -146 *}

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To move the closing member of the hot water tap valve 21 and also to move the corresponding closing member of the cold water tap valve 22, a known cam bushing 23 is provided, which is arranged coaxially to the operating spindle 191 of the quantity setting device 19 pivotable but immovable in the axial direction Control cam sleeve 25 has a control cam 231 and 232, respectively, for the displacement of the closing element of both the hot water tap valve 21 and the cold water nozzle 22 ; and 232 run on the end face of the cam bushing 23 facing the connecting pieces 145 and 146 for the nozzle valves 21 and 22, starting in the opposite direction, starting from a zero position that does not affect both nozzle valves 21 and 22.

The operating spindle 191 of the quantity adjustment device 19 has an external adjustment thread and is guided in an adjustment bushing which corresponds to the external adjustment thread Internal adjustment thread is provided. The operating spindle is sealed from the outside by means of an O-sealing ring. the Adjusting bushing 24 is in a connecting socket 148 on the high-pressure side Housing part 14 of the low-water protection device 10 is screwed in, d'erart that the connection does ζ en 148 both via a Through opening 149 in the wall of the high pressure chamber 12 of the Low water alarm 10 with the high-pressure chamber 12 itself as well as with one branching off to the side of the connection socket 148 Bypass channel 25 is in connection, in which cold water in addition to the cold water supply emanating from the connection socket 141 in the connection sockets 142 and thus to the heat exchanger of the water heater can be conducted to an extent that which is determined by the quantity adjustment device 19. For this purpose, the operating spindle is at the inner end

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a throttle member 192 attached, which the through opening 149 in the wall of the high pressure chamber 12 for Connection piece 148 dominated. 'Inside the throttle element 192 also houses a spring-loaded pressure compensation valve known per se. On the adjustment sleeve 24 the cam bushing 23 is pivotable between stop flanges 26 and 27 which prevent axial displacement. stored. The den'connector 145 and 146 is for the Nozzle 21 and 22 facing stop flange 27 designed so that the pistons 211 or 221 cannot be displaced outwards in the axial direction are held.

According to the invention, the design is such that a sleeve 233 is attached to the circumference of the cam bushing 23 and is provided with an internal gear rim 234 on the inner circumference. The sleeve 233 surrounds a guide bushing 28 which is pivotably mounted on the adjustment bushing 24 and can be longitudinally displaced up to a stop, which consists of a stop flange on the adjustment bushing 24. The guide bushing 28 is pot-shaped and has an external toothed ring 281 on the outer circumference of an open end, which in the position shown according to 'Pig. 1 comes into engagement as a toothing with the * internal gear rim 234 of ^the sleeve 233 and couples the guide bushing 28 with the cam bushing 23. Between the stop flange 26 on the adjustment bushing 24 and the inner bottom of the cup-like guide bushing 28, a compression spring is arranged as a coupling spring 30, which keeps the guide bushing 28 in contact with the stop flange. An actuating handle 31, which is annular and concentrically surrounds the cylindrical head 193 of the operating spindle 191, is blown coaxially onto the guide bushing 28. The operating handle 31 has a handle neck 311, at the inner end of which there are tongues 312 protruding in the axial direction with latching lugs 313 protruding radially inward at their ends, which are inserted into corresponding openings on the circumference of the guide bushing

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are sprinkled, so that the operating handle 31 with the Guide bush 28 against both moving and against Twisting secured connected, but is still removable. The handle neck 311 of the operating handle 31 is provided on the inner circumference with an internal ring gear 314, which at axial displacement of the operating handle 31 against the we- * kung of the clutch spring 30 in an external toothed ring 194 on Head 193 of the operating spindle 191 engages as a toothing and the operating handle 31 with the operating spindle 191 of the quantity setting device 19 and thus for setting the Temperature of the outflowing water. The operating handle 31 closes in its outer division as shown in a plane with the head 193 of the operating spindle I91.

The mode of operation of the water fitting described above in terms of its structure is as follows: ¹

In the one shown in Fig. 1 by the stop flange 29 limited The actuating handle 31 is held in place by the coupling spring 30 on the outer pitch. The operating handle 31 is included coupled via the toothing 281, 234 to the cam bushing 23, which when the operating handle 31 is rotated Nozzles 21 and 22 controls.

If only cold water is to be tapped, the actuating handle 31 is rotated clockwise, so that the control cam the closing member on the cam sleeve 23 via the valve stem of the Kaltwasder nozzle 22 lifts off its valve seat and thus the flow of cold water from the cold water connection piece 141 over the connecting pieces 146 and the valve chamber desKaltwasser-Zapventile 22 to the connection 147 of the Releases water outlet line. .

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When hot water is to be drawn off, the operating handle 51 is rotated counterclockwise so that the control cam 231 lifts the closing member of the hot water tap valve 21 from its valve seat, whereby the water flow from the connection piece 141 of the cold water supply line via the high-pressure chamber 12 of the low-water protection device 10, the connection piece 142 and via the heat exchanger of the water heater to the connection piece 143 and via the valve chamber of the hot water nozzle 21 to the connection piece 147 and thus is released to the water outlet pipe. .

The temperature of the running water can be selected without changing the handle by axially moving the operating handle 31 against the action of the clutch spring 30 and then turning it in one sense or the other. When the actuating handle 31 is moved against the action of the coupling spring 30 , the guide bushing 28 and the toothing 281, 234 are also shifted, ie the coupling between the actuating handle 31 and the cam bushing 23 is canceled , 194 in engagement, so that the operating handle is coupled via the head 193 to the operating spindle 191 of the quantity setting device 19. The temperature of the outflowing water can now be selected by rotating the operating spindle 191 of the quantity setting device 19 accordingly, whereby depending on the position of the operating handle 31, the operating spindle 191 with the throttle member 192 of the quantity adjustment device 19 is additionally fed more or less cold water to the heat exchanger of the water heater via the bypass duct 25. In addition to the positions given by markings, any desired intermediate position can be set, ie one level nless setting of the additional water flow rate possible. Since the amount of heat supplied to the heat exchanger of the water heater by its burner remains constant, the water flowing through the heat exchanger is heated to a greater or lesser extent depending on the flow rate, so that the outlet temperature of the hot water heater corresponds to the setting of the

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Operating spindle 191 is selectable. Will the operating handle after setting the temperature of the draining water released, it returns under the action of the clutch spring 30 back to the starting position shown in FIG. 1 and is again coupled to xler cam bushing 23.

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Claims (4)

Junkers Expectations : Water fitting for a gas-heated instant water heater with a low water protection, the water space of which is divided into a high pressure and a low, pressure chamber, is subdivided, wherein on the peripheral circumference of the high-pressure side housing part each a connection socket for a cold water supply line communicating with the high pressure chamber for one from the high pressure chamber Cold water pipe leading to the V / heat exchanger of the water heater, for a hot water pipe arriving from the heat exchanger, for a hot water tap in connection with the latter and for one with the cold water supply line related whitewater tap as well as moreover on the end face of the high-pressure-side housing part, a connection piece that is in communication with the two nozzle chambers for a water outlet pipe are arranged at which the hot water outlet temperature by changing the to the heat exchanger. amount of cold water flowing by means of a a bypass channel controlling a bypass channel can be selected, the operating spindle of which is selected is provided radially to the high pressure chamber between the two nozzles, the connecting piece with symmetrical spacing and are arranged parallel to the longitudinal axis of the operating spindle, the two nozzles with one inside each Connection piece in the axial direction displaceable closing element are provided, for the displacement of which a cam bushing on a common circular line in the axial direction protruding control cams is provided and the control cam bushing coaxial to the operating spindle of the quantity setting device pivotable but immovable in the axial direction -12- 109817/0851 Junkers 499 1960822 is arranged according to patent ...... (patent application P 19413 84.4) »characterized that both the control cam sleeve (23) for opening the cold water or hot water spigot valve (21 or, 22) as well as the operating spindle (191) of the The quantity adjustment device (19) can be rotated by means of an actuating handle (31) designed in the form of a ring, which-arranged concentrically around a cylindrical head (193) of the operating spindle (191) and with his The handle neck (311) is blown onto a guide bushing (28) which, together with the operating handle (31) on the adjustment bushing (24) of the quantity adjustment device (19) is rotatably and displaceably mounted in the axial direction against the action of a clutch spring (30), through which the operating handle (31) in an external position limited by a stop flange (29) on the positioning socket (24) via a toothing (281, 234) between the guide bushing (28) and the cam bushing (23) this is coupled, whereas this coupling can be released by axially moving the operating handle (31) and the the latter via a toothing (314, 194) which engages during axial displacement between the actuating mechanism. handle (31) and the head (193) of the operating spindle (191) is coupled to this ;. 2. Water fitting according to claim 1, characterized., that the guide bushing (28) is cup-shaped formed and with a bottom cutout on the adjustment bushing (24) of the quantity adjustment device (19) pushed on and under the action of the clutch spring (30) against the Stop flange (29) is arranged adjacent. 3. Water fitting according to claim 1 and 2, characterized that the control cam bushing (23) with a guide bushing (28) of the operating handle (31) surrounding sleeve (233) is firmly connected, which with a 109817/0851 - 13 - ^ Junkers 499 Internal toothed ring (234) is provided, to which an external toothed ring (281) is assigned on the guide bushing (28). 4. Water fitting according to one or more of claims 1
to 3, -marked by * that
the operating handle (31) with an internal gear rim (314)
is provided, which is assigned an external toothed ring (194) on the head (193) of the operating spindle (191). . 109817/0851 L e r s e i t e