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Device for regulation

IP.com Disclosure Number: IPCOM000248523D
Publication Date: 2016-Dec-13

Publishing Venue

The IP.com Prior Art Database

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 27% of the total text.

Device for regulation

-2-

One possibility is to rotate the first element relatively to the second element.

The first element has a first presetting geometry which is, for example, an

opening, window or just a border which is slanted to a circumferential

direction. The height of the flow area parallel to the valve axis then depends

5 on the angular position of the first element relative to the second element.

It is rather difficult to perform presetting with the necessary precision, in

particular in a low flow area. This is important in connection with an electronic

thermostat with a step motor and the knowledge in the system about the

10 presetting geometries. Using a step motor gives the possibility to have the

exact position of the spindle and if the system knows the geometries it can

position the presetting very accurate.

The object underlying the invention is to give the possibility of precisely

15 adjusting presetting of the valve.

This object is solved with a valve as described at the outset in that said

second element has a second presetting geometry limiting said flow area.

20 Said first presetting geometry and said second presetting geometry together

limit said flow area. When the second element does not only define a simple

window or opening but has a second presetting geometry, the combination of

the two presetting geometries allows for a better adjustment of the size of the

flow area and therefore a more precise adjustment of the presetting.

25

Preferably said first element and/or said second element are at least in a

region of said presetting geometry made of a plastic material. When a plastic

material is used, the first element and/or the second element can be formed

by molding, for example injection molding. During such a production process

30 the first presetting geometry and/or the second presetting geometry can be

produced without any additional effort and with a rather high accuracy. No

machining is necessary.

In a preferred embodiment said second presetting geometry extends in

5 circumferential direction around said valve axis and comprises at least one

section in which it extends additionally parallel to said valve axis. In other

words, said second presetting geometry deviates from a pure circumferential

direction. It can be slanted, curved or can have any other form to limit the

flow area and to cause a change of the size of the flow areas when the first

10 element and the second element are moved relatively to each other.

Preferably in a direction parallel to said valve axis said second presetting

geometry limits said flow area on both sides. In other words said second

presetting geometry forms an opening or a window in the second element.

15 The flow through the flow path must pass this window or opening. This

window or opening is at least partly closed by the first element.

In a preferred embodiment said second presetting geometry shows a

triangular form. A triangular form has a base and a tip and the width of a

20 tr...