Device for regulation
Publication Date: 2016-Dec-13
The IP.com Prior Art Database
Device for regulation
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.
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