DE7540429U - VALVE FOR HOT WATER SUPPLY SYSTEM - Google Patents

Description

J3_75 4Ο_4_29_ί1 ';

1 3rd JUN11977

Albert Lins , Küsnacht / ZH

(Switzerland)

\ Valve for hot water supply system

The present innovation concerns a valve for hot water supply systems, with a control cell which, with a control rod, moves onto a movable rod that is under the pressure of a spring Ches valve member acts, wherein means for manual adjustment I of the movable valve member are provided, the one, between j see the control rod and the valve member arranged, include the latter acting rocker arm, characterized in, that a control cam disc rotatable against the action of a return spring cooperates with the rocker arm, in such a way that that a setting made by hand with a subsequent displacement of the valve member by the control cell is automatically canceled by an automatic reset of the control cam disc.

75W29 09/08/77

Such a valve is for example by the CH-PS No. 368 672 or the CH-PS No. 453 828 of the same applicant become known, such valves primarily being used to control a medium as a function of a physical state variable to control. The valves are used, for example, to keep a water flow at a constant or adjustable level Keep temperature. The current feeding the control cell can be dependent on the temperature of the water flow be switched on or off, and the movable valve element regulate the flow of cold or warm water. Areas of application are the hot water supply, as well as air conditioning or the temperature-dependent return control for hot water heating.

In the known valve, the means for manual adjustment comprise an outwardly protruding lever which is located in a slot is guided in the housing of the valve, with side recesses of this slot for locking the arm in-different Branch positions. These measures gesta + -. uen, the valve, If the control cell fails, for example, can also be set manually.

A major disadvantage of this valve is, in addition to your rerelativ large space requirement because of the protruding hand lever that after a manual setting and after reinsertion the automatic control activity by the control cell does not automatically cancel the manual setting can and thus the automatic tax activity remains ineffective, until the previous manual adjustment is canceled again by hand. This deficiency can become significant, intolerable! Lead to energy losses.

It is therefore the task of the present innovation to address this deficiency to fix on the previously known valve, which according to the innovation thereby What is achieved is that the rocker arm closes a control cam disk that can be rotated against the action of a return spring cooperates in such a way that a setting made by hand with a subsequent displacement of the valve member by the The control cell is automatically canceled by an automatic reset of the control cam disc.

With these measures it is now possible to carry out the manual Adjustment of the valve, for example in the event of a power failure or for a quick tightening of one with Reduced operation of the heating system, with a subsequent control function of the control cell on the movable valve element to be lifted again automatically and to bring the control cam disc back into its starting position. Apart from the The compact design of such a valve, which is possible in this case, now becomes excessive due to a "forgotten" manual setting Energy consumption prevented under all circumstances.

An example embodiment of the subject of the innovation is explained in more detail below with reference to the drawing.

Show it:

1 shows in section a mixing valve according to the innovation;

FIG. 2 shows a partial representation of the arrangement according to FIG. 1, rotated by 90 °;

3 shows a first detail of the arrangement according to FIGS. 1 and 2;

08.09.77

_ Λ 'et »«

and

4 shows a further detail of the arrangement according to FIGS. 1 and 2.

The valve shown in Fig. 1 and 2 comprises a base plate 1 with a downwardly projecting flange 2, with which the control part 4 of the valve, which is surrounded by a housing 3, can be wound onto the valve body 5.

The control part 4 here comprises a control cell 6 of known construction. For example, this control cell can include an expansion space with a medium which changes when the temperature increases expands or contracts when the temperature drops and this exerts a proportional control movement on a membrane, which this movement on the in the representation visible piston rod 7 transmits. The temperature of the control medium can be determined by an electrical resistance determine, which receives its impulses via an electrical sensor circuit, whereby the heat sensor in question is at any one Can be located, the temperature of which is to be controlled by the valve.

Said piston rod 7 now interacts with a pin 8, which at its lower end is the movable Vontile organ carries, which cooperates with valve seats 10 and 11 and thereby the flow of a medium, for example water, between the connection posts 12, 13 or 14 regulates. This' pin 8 extends through the valve body 5 and through the Bottom plate 1 through into the housing 3 and abuts the front side against the lower end face of the piston rod 7 (Fig. 2). The state of equilibrium is kept upright by a spring 15

'/ 540429 09/08/77

th, which is supported on the one hand on an end flange 16 on the pin 8 and on the other hand on the valve body 5.

It can now be seen without further ado that when the temperature rises the control cell 6, the piston rod 7 and thus the movable valve member 9 via the pin 8 in the illustration will move down from the upper extreme position shown. As a result, the movable valve member 9 moves away from the valve seat 10 and approaches the valve seat 11. A lower extreme position is reached when the movable valve member 9 opens the valve seat 11 rests. An override is caused by the monitoring of the axial position of the piston rod 7 Prevents limit switches 17 and 18, which intervene regulatingly in the control circuit when they are actuated. This override can of course also in other ways, for example upwards by means of stop means and downwards by a possible relative displacement between the pin 8 and the movable valve member 9 can be prevented.

For the necessary manual adjustment of the movable valve member 9 via the pin 8 and against the action of the compensating spring 15, a rocker arm 20 is initially provided, the shape of which can be seen from FIG. This rocker arm 20 is one-sided with a projection 21 articulated in a mounting bracket 22 and lies with its own weight on the end flange ic on pin 8 (Fig. 1). Extends at its other end the rocker arm 20 with a projection 23 into an elongated guide slot 24 in the mounting bracket 22.

It can be seen that when the projection 23 of the rocker arm 20 is pressed, the latter is pivoted clockwise.

75 ^ 0429 08.09.77

the can, whereby by the pressure of the rocker arm 20 on the end flange 16, the pin B and thus the movable valve member 9 is moved downward against the action of the compensating spring 15. During this movement, the piston rod 7 can follow the pin 8, for example, or, if there is one, on the piston rod 7 acting return spring, the piston rod 7 remain in an upper position, while the pin 8 of this removed.

For this adjustment that is independent of the activity of the control cell 6 of the movable valve member now interacts with the rocker arm 20, a control cam disk 25, the shape of which in 3 can be seen in detail. This cam-shaped disc 25 is in rotary connection with a rotary handle 27 via a shaft 26 supported in the housing 3 or in the mounting bracket 22 and with this in a counterclockwise direction, or, depending on the design, also in a clockwise direction against the action of a return spring 27 rotatable

Upon rotation of the rotary handle 27, the rocker arm 20 is now moved by the cam track 29 of the disk 25 (FIG. 3) pressed down until a nose 30 on the disc 25 engages a recess on the rocker arm 20 rear. In this position is then the pin 8 with the movable valve member 9 is moved downward by a predetermined amount. Then from the movable one The position assumed by the valve member does not quite correspond to the lower extreme position, which is only due to the influence of the control cell 6 can be achieved. The remaining distance is then used to restart the control function through the control cell 6 to give the latter the possibility of notching through the residual displacement of the pin 8 downwards between the rocker arm 20 and the nose 30 on the

Effect control cam disk 25 au. This is possible because of the Rocker arm 20 follows the movement of pin 8 by its own weight. The rotary handle then rotates in response to a notch 27 automatically returns to its inoperative starting position under the action of its return spring 28.

From what has been described above, it can be seen that in the valve shown there is now a faultless automatic cancellation of a Manual adjustment is guaranteed by a subsequent automatic control of the valve.

^ 0429 08.0 * 71

Claims (3)

Protection claims 1. Valve for hot water supply systems, with a control cell that has a control rod on one under the pressure a spring standing, movable valve member acts, wherein means for manual adjustment of the movable valve member are provided, the one arranged between the control rod and the valve member, acting on the latter Include rocker arm, characterized in that with the rocker arm (20) a counter to the action of a return spring (28) rotatable control cam disc (25) cooperates in such a way that a setting made by hand with a subsequent displacement of the valve member (8, 9) by the control cell (6) is automatically canceled by a automatic reset of the control cam disc. 2. Valve according to claim 1, characterized in that the control cam disc (25) with a rotary handle (27) on the outside Valve housing (3) is in rotary connection. 3. Valve according to claim 2, characterized in that on the A return spring (26) engages the control cam disk (25) or the rotary handle (27). Pe / lj
1.6.1977 7548429 08.0177