DE2451675A1 - Overflow valve for heating systems with thermostatic radiator valves - is adjustable to delivery of circulation pump to prevent flow noises - Google Patents

Abstract

The overflow valve assembly located between the delivery and return branches of the circulation pump in the heating system has a spring-loaded valve and a thermostat identical to the one which measured delivery temp. The spring-loaded valve can be adjusted manually by turning a control knob to actuate the spindle acting on the spring until the temp. at the overflow valve matches the delivery temp., thus determining the pump delivery. When the radiator valves are throttled, the press. in the system increases and the spring-loaded valve in the overflow assembly opens automatically, drawing off the excess press.

Description

Overflow valve

especially for heating systems with thermostatic

Radiator valves

The invention relates to an overflow valve, installed between the flow and return of a heating system or between the positive and negative pressure side of a heating circulation pump and the arrangement of two thermometers of the same make or quality, one of which is connected to the flow of a heating system and one preferably with the overflow valve, is positively connected for at least the duration of a measuring process and a valve design in the overflow valve which, depending on the existing pump pressure, can be set to the operating point of the circulating pump in a heating system with the mixer fully open and the radiator valves fully open and I die, at a change in the operating point in the heating system, e.g. by closing thermostatic radiator valves, via a bypass line, e.g. from the flow to the return, a pressure increase in the heating network by the heating circulation pump does not occur at all or only slightly, and then ch eliminates disturbing flow noises in the throttle position of the thermostatic radiator valves.

Since then thermostatic radiator valves have been manufactured, regardless of the make, they have all the advantages has the disadvantage that in the throttle position just before the In the closed position, disturbing flow noises occur on the valve body, which are due to the fact that the heating circulation pump

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no longer the one calculated for the design of the heating network " Can circulate the amount of water and thus inevitably increases the pressure of the heating circulation pump.

Numerous designs are known and in use, to reduce the increased pressure of the heating circulation pump when the thermostatic radiator valves are throttled « Attempts have been made to install overflow valves directly in the bypass system to arrange a heating circulation pump, or you build overflow valves between the flow and return of a heating system one, or one short-circuits the heating lines at the end of the flow and return, or one builds in the, A manually operated radiator valve is fitted to the radiator furthest away from the boiler, or you can do without it even to ensure a minimum circulation of the heating

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-water and thus a reduced pump pressure when closing the thermostatic radiator valves in each Case.

To date, none of these measures has led to a satisfactory result, because with the known ones, very expensive overflow valves an adjustment extremely difficult, complicated and thus expensive and also it is not visually recognizable whether these valves are correctly set and thus uncontrolled water volumes, instead of flowing through the network of the heating system through the Bjypass in the normal state.

The same applies to the manual measures, e.g. »short circuit lines, to flow noise in the Throttle position of thermostatic radiator valves to be

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close, because at least will be in this. State through, The increased pressure of the circulation pump raised the return temperature considerably, which in turn was undesirable Heat emission or «, meant an undesirable waste of energy

The object of the subject matter of the invention is to use a simple and inexpensive designed overflow valve To give heating engineers the opportunity to precisely determine the operating point of a circulation pump in a heating system to be able to and through a simple setting of the overflow valve the flow noises with thermostatic radiator valves to prevent in throttle position, the subject of the invention solves the problem by the Overflow valve, installed between the high pressure side and the low pressure side of a circulation pump, or between The flow and return of a heating system is provided with a thermometer, or by placing a thermometer in the immediate vicinity Near the overflow valve is arranged, which by the make or the quality with the anyway im / am Boiler or in / on the flow required thermometer is identical, and in-the manual there is the possibility to do the To change the valve position in the overflow valve from the outside, until through the slowly occurring smallest water flow from the high pressure side to the low pressure side of a circulation pump or from the flow to the return of a heating system, the temperature displayed on the boiler or flow thermometer (during the heating process with the mixer fully open and the radiator valves fully open) with the temperature display of the

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thermometer located in / on the overflow valve matches and thus the operating point of the circulation pump is determined.

With one, by throttling the thermostatic radiator valves The pressure increase in the network now inevitably opens the spring-loaded valve in the overflow valve and directs the overpressure above the normal operating pressure either to the underpressure side of a Circulation pump or in the return of a heating system. The subject of the invention is shown in Figures 1-7 and described

FIG. 1 shows the subject matter of the invention installed in a bypass line between the high pressure side and the low pressure side of a circulating pump. . _f

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Figure 2 shows the subject matter of the invention installed between Flow and return of a heating system.

Figure 3 shows an embodiment of the subject of the invention and FIG. 4 shows a section through subject matter O of the invention

FIG. 5 shows a diagram with the assumed power curve a heating circulation pump and Figure 6 shows a diagram with the assumed resistance characteristics of a Heating system "

In the further course of the description, the overflow valve mentioned below is included under the subject of the invention to understand.

As can be seen from Fig. 1 and 2, the overflow valve (1) can be between the high and low pressure side

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a circulation pump (7), as well as between the flow (2) and the return (3) of a heating system. The necessary to adjust the overflow valve (1) Thermometer (4), which qualitatively with the Yo rl on thermometer (5) must be identical, should advantageously, as can be seen from Fig. 1, directly on or in the overflow valve ' (1) be ordered,

But it can also, as can be seen from FIG Near the overflow valve (1) »The real invention lies in the combination Thermometer (5) on the flow, overflow valve (1) with it associated thermometer (4), the spring-loaded valve (8) in the overflow valve, which can be adjusted to different pump pressures (1) and the adjustment button (9) »with the via the spindle (10), the spring (15) and the spring sleeve (11) the spring-loaded valve (8) are loaded or unloaded and thus on one located in a heating system Operating pressure of a heating circulation pump (7) can be set »

The spring (15) is in the delivery condition of the overflow valve (1) Appropriately designed for a pump pressure of max. 2m WS.

Two or more springs (15) are attached to the overflow valve (1), which are advantageously color-coded and are designed for higher pump pressures, so that if necessary, at the point of installation of the overflow valve (1) the spring (15) can be exchanged for a stronger one, which is also associated with the advantage that with only

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an overflow valve (1), the entire range of the most commonly used heating circulation pumps can be mastered. The setting is made as described below. With the mixing valve (6) fully open and the thermostatic radiator valves (12) fully open, a heating system is put into operation and heated during the heating process, if possible in the area between. 30 and 40 C at the flow, while the thermostatic radiator valves (12) are definitely still fully open, the spring-loaded valve (8), which has been closed until then, is noticeable by the marking point (13) by turning it in the opening direction is opened at intervals of about _o 30 seconds. The thermometer (4) assigned to the overflow valve (1) is influenced at the moment when a fraction of the flow water now flows through the bypass line (14) of the overflow valve (1).

At this moment the spring-loaded valve (8) is set to the operating point of the circulating pump (7), i.e. to the pressure of the circulating pump that is present in a heating system when the mixer (6) is fully open and the thermostatic radiator valves (12) are fully open " This operating point “A ^IS is assumed to be shown in FIG. 6.

During the further heating process the thermostatic ones close Radiator valves (12) - thus reduce the amount of water circulating in the circulating pump (7) and cause a Pressure increase in the heating system due to the circulation pump (7)

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_{Operating point "B" e} shows an average value between fully open and fully closed thermostatic radiator valves (12)

FIG. 6 clearly shows how the pressure of the heating circulation pump (7) rises due to the small amount of water circulating and how the operating point "A" shifts to "B" on the pump curve "C" and theoretically reaches point "D" could, if not, this increased pressure rise or _o the amount of water over the now set overflow valve associated (1) may flow out ₀

In any case, the overflow valve (1) ensures that the operating pressure "A" of the circulating pump is set correctly (7) does not change in a heating system, regardless of the position in which the thermostatic Radiator valves (12) are located «,

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Claims (1)

Claims 1 · Overflow valve, especially for heating systems
with thermostatic radiator valves, with a spring-loaded valve and a spring-influencing spindle which can be moved via a rotary knob, characterized in that the overflow valve (1) with a
Thermometer (4) is provided, or that the thermometer (4 ·) in the immediate vicinity of the overflow valve (1) at least for the duration of one
The measuring process is positively connected to the overflow valve (1) and qualitatively identical to the flow thermometer (5) and that the spring-loaded valve (8) is set to the operating point of the heating circulation pump (7) in a heating system as a function of the flow temperature
can be. ■ s 2. Overflow valve according to claim 1) thereby
characterized in that the spring (15)
in the overflow valve (1) can optionally be exchanged for a stronger one, depending on the required circulation pump pressure. 5. Overflow valve according to claim 1 and 2), characterized in that the adjusting knob (9) provided with a marking point (13) is. 609820/0067 Blank page