Patent ID: 6058974
Filing Date: 2000-05-09
Classification: F16K,F28G,Y10T

Abstract:
A valve (12) for changing the flow direction of a fluid in conduits (2, 3), which conduct the fluid to and from, respectively, a heat exchanger (1) wherein said valve (12) comprises a rotatable valve body (18) and a surrounding valve housing consisting of a cylindrical casing (14) with end plates (13a, 13b), said valve body (18) having a rotational axis coinciding with the imaginary axis of the cylindrical casing (14), and four through passages (19-22) extend through the valve body (18) so oriented that the main flow directions of the fluid are parallel with the rotational axis of the valve body (18) and such that the openings (19a-20b) in two through passages (19, 20), when the valve body (18) is in a first rotational position, are right in front of two openings in the respective end plate (13a, 13b) and that the openings (21a-22b) in the two other through passages (21, 22), when the valve body (18) is in a second rotational position, are right in front of said openings in the end plates (13a, 13b),characterized in thattwo opposite through passages (19, 20) are substantially parallel with the rotational axes of the valve body (18) and that the two other through passages (21, 22) extend obliquely through the valve body (18), so that their respective ends (21a-22b) are displaced about 180.degree., and that at least two of the through passages (19-22) do not have circular sections in the middle portion of the valve body (18).