Heat exchanger
Disclosed is a heat exchanger for fluids, particularly hydraulic oil, comprising a housing (1) in which fluid ducts (4) and coolant ducts (5) alternate and which is equipped with an inlet (8) for hot fluid, an outlet for cooled fluid as well as an inlet and an outlet (10) for the coolant. An internal cylinder chamber (7) that is lined by a fluid filter (13) on the circumference thereof is provided inside the housing. The delivered hot fluid or the discharged cooled fluid is fed into or discharged from the fluid ducts via said fluid filter (13).
The invention relates to a heat exchanger for fluids, in particular hydraulic oil, having a housing in which fluid conduits and coolant conduits alternate with one another, in which the housing has an inlet for hot fluid, an outlet for cooled fluid, and one inlet and one outlet for the coolant.
Such heat exchangers are versatile in use. The disadvantage of the known heat exchangers is that the hot fluid, such as hydraulic oil, before entering or after leaving the heat exchanger must be passed through a separate filter device, to remove foreign bodies from the fluid.
The object of the invention is to overcome this disadvantage and to attain cleaner cooled fluid in a structurally simple way. A heat exchanger of the type defined at the outset and embodied according to the invention is distinguished in that in the housing, a central cylindrical chamber is provided, which is lined on its circumference by a filter, by way of which the inflowing hot fluid or the outflowing cooled fluid enters or emerges from the fluid conduits.
In this way, it is attained that immediately before or after its is cooled, the hot fluid is filtered, so that a separate filter device upstream or downstream of the heat exchanger is unnecessary.
In a preferred embodiment of the invention, the housing is formed by an essentially block shaped packet comprising plates that define horizontal fluid conduits and coolant conduits, which plates are penetrated by the cylindrical chamber and by both a coolant conduit and a fluid outlet conduit. Alternatively, the housing is formed by a cylindrical body, in which the fluid conduits and the coolant conduits are embodied in the form of rings of axially extending conduits, and one or more outer rings of fluid conduits discharge at the face end of the housing toward the fluid inlet, and on the top of the cylindrical chamber, a deflection from the inner fluid outlet conduit to the outer fluid outlet conduit or outer fluid outlet conduits is provided.
Further characteristics of the invention will be described in further detail below in terms of exemplary embodiments, in conjunction with the drawings. Shown are:
In
The flow direction of the fluid and of the coolant can also be reversed. In that case, the cooled fluid flows via the filter body 13 into the cylindrical fluid space 7 and from there out of the housing.
In the exemplary embodiment of
As
In
Claims
1. A heat exchanger for fluids, in particular hydraulic oil, having a housing (1) in which fluid conduits (4) and coolant conduits (5) alternate with one another, in which the housing has an inlet (8) for hot fluid, an outlet for cooled fluid, and one inlet and one outlet (10) for the coolant, characterized in that in the housing (1), an internal cylindrical chamber (7, 7′) is provided, which is lined on its circumference by a fluid filter (13), by way of which the inflowing hot fluid or the outflowing cooled fluid enters or emerges from the fluid conduits (4, 4′, 4″).
2. The heat exchanger as defined by claim 1, characterized in that the housing (1) is formed by an essentially block shaped packet comprising plates (2, 3) that define horizontal fluid conduits (4) and coolant conduits (5), which plates are penetrated by the cylindrical chamber (7) and by both a coolant conduit (6) and a fluid outlet conduit (12).
3. The heat exchanger as defined by claim 1, characterized in that the housing (1′) is formed by a cylindrical body, in which the fluid conduits (4′, 4″, 4′″) and the coolant conduits (5, 5′) are embodied in the form of rings of axially extending conduits, and one or more outer rings of fluid conduits (4″, 4′″) discharge at the face end of the housing toward the fluid inlet, and on the top of the cylindrical chamber (7′), a deflection from the inner fluid outlet conduit (4′) to the outer fluid outlet conduit or outer fluid outlet conduits (4′, 4′″) is provided.
Type: Application
Filed: Oct 13, 2005
Publication Date: Jun 25, 2009
Inventors: Philipp Pustelnik (Wien), Thomas Euler-Rolle (Wien)
Application Number: 11/666,523
International Classification: F28D 7/00 (20060101);