Valve diverter with heat sink

Abstract

A valve-type arrester includes a heat sink for dissipating heat from the interior of the valve-type arrester into the surroundings of the valve-type arrester. The heat sink has a circular-cylindrical main body with a base surface, a top surface parallel to the base surface and a casing surface connecting the base surface and the top surface. The heat sink additionally has a plurality of fins disposed on the main body, in which each fin is formed in the shape of a sheet or a leaf and disposed on the casing surface of the main body.

Claims

1. A valve-type arrester, comprising: an interior and an outer surface defining surroundings of the valve-type arrester a plurality of discharging resistors; and a plurality of heat sinks for dissipating heat from said interior of the valve-type arrester to said surroundings the valve-type arrester; said heat sinks each including a circular-cylindrical main body having a base surface, a top surface parallel to said base surface, a casing surface interconnecting said base surface and said top surface and a plane parallel to said base surface; each of said heat sinks being disposed between a respective two of said discharging resistors placing said top surface and said base surface of each of said heat sinks in thermal contact with a respective one of said discharging resistors; said heat sinks each including a plurality of sheet-shaped fins disposed on said casing surface of said main body, each of said fins of each of said heat sinks having a surface forming said outer surface of the valve-type arrester; and each of said fins being a substantially planar flat body and forming an inclination angle different from 90 degrees with said plane parallel to said base surface of said main body or at least one of said fins being a bent flat body.

2. The valve-type arrester according to claim 1, wherein each of said fins is a substantially planar flat body forming said inclination angle different from 90 degrees with said plane parallel to said base surface of said main body, and all of said fins form the same inclination angle with said plane parallel to said base surface of said main body.

3. The valve-type arrester according to claim 1, wherein each of said fins protrudes perpendicularly from said casing surface of said main body.

4. The valve-type arrester according to claim 1, wherein said heat sinks are formed of an electrically conductive material.

5. The valve-type arrester according to claim 4, wherein said heat sinks are formed of aluminum.

6. The valve-type arrester according to claim 1, wherein said discharging resistors and said heat sinks are stacked one above the other in the manner of a tower, and said base surfaces of all of said heat sinks are perpendicular to a longitudinal axis of the valve-type arrester.

7. The valve-type arrester according to claim 1, which further comprises insulating elements at least partially surrounding said discharging resistors and electrically insulating said discharging resistors from said surroundings of the valve-type arrester.

8. The valve-type arrester according to claim 1, wherein each respective one of said heat sinks is formed of an electrically conductive material and electrically interconnects said discharging resistors between which said heat sink is disposed.

9. The valve-type arrester according to claim 1, wherein at least one of said heats sinks bears against a respective one of said discharging resistors.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) The above-described properties, features and advantages of this invention and also the manner in which these are achieved will become clearer and more distinctly comprehensible in connection with the following description of the exemplary embodiments which are explained in more detail in connection with the drawings, in which:

(2) FIG. 1 shows a detail of a perspective sectional illustration of a valve-type arrester,

(3) FIG. 2 shows a perspective illustration of a portion of a valve-type arrester, and

(4) FIG. 3 shows a perspective illustration of a heat sink for a valve-type arrester.

DESCRIPTION OF THE INVENTION

(5) Parts which correspond to one another are provided with the same reference symbols throughout the figures.

(6) FIGS. 1 and 2 show details of a valve-type arrester 1. FIG. 1 shows a perspective sectional illustration of the valve-type arrester 1, and FIG. 2 shows a perspective illustration of a portion of the valve-type arrester 1.

(7) The valve-type arrester 1 has a plurality of heat sinks 2, a plurality of discharging resistors 3 and a plurality of insulating elements 4. In this case, the discharging resistors 3 and the heat sinks 2 are arranged stacked one above the other in the manner of a tower, so that each heat sink 2 is arranged between two discharging resistors 3.

(8) FIG. 3 shows a perspective illustration of one of the heat sinks 2. The heat sink 2 is produced from aluminum and is of integral design. Said heat sink has a main body 5 and a plurality of sheet-like fins 6 which are arranged on the main body 5.

(9) The main body 5 is substantially in the form of a flat circular cylinder, so that its surface has a planar base surface 7, a planar top surface 8, which is parallel to the base surface 7, and a not necessarily planar casing surface 9 which connects the base surface 7 and the top surface 8. The bottom face and the top face of the main body 5 optionally each have an annular groove 10 which makes it easier to position and secure the heat sink 2.

(10) The fins 6 are arranged next to one another in the manner of ribs on the casing surface 9 of the main body 5 along a circumference of the casing surface 9 and each protrude in a perpendicular manner from the casing surface 9. Each fin 6 is in the form of a substantially planar flat body and has a web portion 6.1, which is connected to the casing surface 9, and an end portion 6.2, which adjoins the web portion 6.1. The end portion 6.2 is substantially in the form of a flat cube. In this case, a first side surface 6.3 of the cube is of diamond-shaped design, faces the casing surface 9 and is connected to the web portion 6.1. A second side surface 6.4, which is likewise diamond-shaped, runs parallel to the first side surface 6.3 and is averted from the casing surface 9.

(11) The two diamond-shaped side surfaces 6.3, 6.4 of an end portion 6.2 each have a relatively long diagonal and a relatively short diagonal, wherein the relatively long diagonals of the two diamond-shaped side surfaces 6.3, 6.4 are arranged parallel to one another. These relatively long diagonals of the two diamond-shaped side surfaces 6.3, 6.4 delimit a cross-sectional surface of the end portion 6.2 which forms an inclination angle, which is different from 90 degrees, with a plane which is parallel to the base surface of the main body 5. In this case, the inclination angle is the same for all of the fins 6 of the heat sink 2. As a result, all of the fins 6 of the heat sink 2 are arranged obliquely to a cylinder axis of the main body 5.

(12) The discharging resistors 3 are each in the form of circular-cylindrical metal-oxide resistors. The discharging resistors 3 and the main bodies 5 of the heat sinks 2 are arranged coaxially in relation to one another, so that the cylinder axes thereof lie on a straight line which forms a longitudinal axis of the valve-type arrester 1.

(13) The radii of the base and top surfaces of the discharging resistors 3 correspond to the radii of the base surfaces 7 and top surfaces 8 of the main bodies 5 of the heat sinks 2. The base surface 7 of the main body 5 of a heat sink 2 bears against the top surface 8 of the discharging resistor 3 which is arranged beneath it, and the top surface 8 of the main body 5 of a heat sink 2 bears against the base surface 7 of the discharging resistor 3 which is arranged above it. The surfaces of the fins 6 form outer surfaces of the valve-type arrester 1.

(14) The insulating elements 4 are produced from silicone. Said insulating elements are each of annular design and each surround the casing surface 9 of a discharging resistor 3. An inner surface of an insulating element 4, which inner surface faces a discharging resistor 3, bears against the casing surface 9 of the discharging resistor 3. The outer surface of an insulating element 4 has an outer curvature which runs in the manner of a brim of a hat.

(15) The valve-type arrester 1 is arranged in a vertical manner, so that the longitudinal axis of said valve-type arrester runs in the direction of gravity. If, in the case of an overvoltage, a current flows through the valve-type arrester 1, the discharging resistors 3 heat up. The main bodies 5 of the heat sinks 2 absorb heat from the discharging resistors 3 and route said heat to their fins 6. The fins 6 emit heat to the air in the area surrounding the valve-type arrester 1. The heated air rises in the field of gravity. By virtue of the inclined position of the fins 6, an air flow of the heated air, which runs upward in a helical manner and is indicated by the direction of arrows in FIG. 2, is produced along the outer face of the valve-type arrester 1.

(16) Even though the invention has been illustrated and described in detail by a preferred exemplary embodiment, the invention is not restricted by the disclosed examples and other variations can be derived from said examples by a person skilled in the art, without departing from the scope of the invention. For example, all or some of the fins 6 can be in the form of bent flat bodies rather than substantially planar flat bodies.