EP1854969A2 - Heated alternating cutter insert for a cutter, in particular in a crank case ventilation system - Google Patents

Abstract

The insert (1) has a heating wire attached to a separating medium (3) for heating the insert. The heating wire is attached in a meander-shape. The separating medium is formed laminar and wound on a filter carrier (5). Contact electrodes (6) are arranged on the separating medium or on the filter carrier, where the contact electrodes are electrically connected with the heating wire. The contact electrodes are arranged at front sides (7) of the insert. The electrodes are electrically connected with connecting sockets on an outer side of a separator.

Description

The invention relates to a Wechselabscheidereinsatz for installation in a separator for the separation of liquids with a Abscheidemedium.

Such a separator is from the US 4, 627, 406 known. This separator is designed for crankcase ventilation on an internal combustion engine. In crankcase ventilation, the oil-blown blow-by gases are passed through a replaceable separator insert consisting of a separation medium and a filter support carrying the separation medium. Separation (separation) of the gases from the oil takes place in the separation medium. The thus purified gas is then passed to the intake side of the exhaust gas turbocharger, for example, while the separated oil is returned to the oil pan.

The invention has for its object to improve a Wechselabscheidereinsatz according to the preamble of claim 1 so that it works reliably under all operating conditions.

According to the invention this object is achieved in that the Wechselabscheidereinsatz is heated. This solution is based first of all on the knowledge that at low temperatures, the throughput through the Wechselabscheidereinsatz is greatly reduced. At temperatures around and below freezing it can By freezing condensate come to that, especially in Wechselabscheidereinsätzen of fibers no throughput. This is avoided by the fact that the Wechselabscheidereinsatz is heated.

In a preferred embodiment, a heating wire is preferably mounted meandering on the Abscheidemedium. The heating wire can be designed differently, for example as a heating tape, and the attachment can also be designed such that after a one-sided application of the heating wire to the separating medium with a further layer of separating medium the heating wire is covered and thus embedded in the separating medium.

The separation medium is preferably flat and wound onto a filter carrier.

The invention thus provides a heating possibility for Wechselabscheidereinsätze, wherein the heating wire is preferably applied meandering on the Abscheidemedium and then wound onto the corresponding filter support or brought into the predetermined shape.

In an embodiment according to the invention, contact electrodes are arranged on the separation medium or on the filter carrier and are electrically connected to the heating wire.

The contact electrodes are arranged in one embodiment, respectively on the end faces of the Wechselabscheidereinsatzes.

The separator for receiving the described Wechselabscheidereinsatzes has electrodes which produce an electrical connection with the contact electrodes when installing the Wechselabscheidereinsatz.

Preferably, the electrodes are electrically connected to connection sockets on the outside of the separator. These connection sockets are used for the power connection to heat the heating wire.

In a particular embodiment, the separator with the Wechselabscheidereinsatz used is a crankcase ventilation of internal combustion engines. When using fiber separators without heating it can - as stated - come at temperatures around or below freezing point that due to frozen condensate no throughput through the fiber separator is possible , The result is a strong increase in the crankcase pressure up to several bar pressure with the risk of damage to components of the internal combustion engine. Such fiber separators have high deposition rates, so that a high oil separation from the blow-by gas takes place in normal operation. The gas thus purified then has no negative influence on the combustion and consequently the exhaust emissions when it is recirculated to the combustion air. The separator according to the invention with the Wechselabscheidereinsatz can also be used in the context of the invention in a fuel filter or an oil filter, ie in any deposition of liquids such as oil or fuel.

The heating is controlled by the control unit of the preferably auto-ignited internal combustion engine. In the control unit measured temperature signals are processed, so that the additional control of the heating is not a significant additional effort. The heating of the Wechselabscheidereinsatzes can thus be integrated into a possibly stored in the control unit cold start process of the internal combustion engine similar to the charge air preheating or fuel preheating. The heating power is preferably in the range of 10-300 watts.

A heating with PCT element (temperature-dependent electrical resistance) is also conceivable. In this case, a completely independently operating control device is provided which can be used, for example, in mechanically controlled internal combustion engines.

By an appropriate design of the filter carrier or the separating medium and the housing of the separator ensure contact electrodes in the housing and on corresponding surfaces of the filter support the power supply to the heating wire. Thus, a simple uncomplicated replacement of Wechselabscheidereinsatzes possible

Further advantageous embodiments of the invention are described in the drawings, in which an illustrated in the figures embodiment of the invention is described in detail.

Figure 1 shows a separator 2 as a crankcase ventilation of a self-igniting internal combustion engine in an exploded view.

The separator 2 consists of a housing 8 and a cover 9. The reference numeral 10 denotes the inlet opening for the blow-by gases. About the outlet opening 11, the purified gases reach the intake pipe of the exhaust gas turbocharger. The separated oil passes through the return 12 back into the crankcase.

The separation of the oil takes place in a Wechselabscheidereinsatz 1, which in turn consists of a filter carrier 5, on which a Abscheidemedium 3 is wound.

FIG. 2 shows the separation medium 3 in the unwound state. On the separation medium 3, a heating wire 4 is applied, which is for heating the Wechselabscheidereinsatz 1 is used. The heating wire 4 is applied meandering in the example shown here.

So that a voltage can be applied to the heating wire 4, there are 5 contact electrodes 6 on the separation medium 3 or the filter support, which are electrically connected to the heating wire 4. These contact electrodes 6 are arranged in the example shown here in each case on the end faces 7 of the Wechselabscheidereinsatzes 1.

In the separator 2 suitable electrodes are installed here, which produce an electrical connection to the contact electrodes 6 during installation of the Wechselabscheidereinsatzes 1. The electrodes are electrically connected to connection sockets (not shown in the figures) on the outside of the separator 2. In the figure 1, a contact electrode 6 is drawn only indicated.

Reference numerals:

1

Wechselabscheidereinsatz

2

separators

3

separating medium

4

heating wire

5

filter support

6

contact electrodes

7

front sides

8th

casing

9

cover

10

inlet opening

11

outlet opening

12

return

Claims (11)

Change separator insert (1) for installation in a separator (2) for separating liquids with a separating medium (3),
characterized in that the Wechselabscheidereinsatz (1) is heatable. Exchange separator insert according to claim 1,
characterized in that on the separation medium (3) a heating wire (4) is mounted. Exchange separator insert according to claim 2,
characterized in that the heating wire (4) is preferably mounted meandering. Replacement separator insert according to one of the preceding claims,
characterized in that the Abscheidemedium (3) is flat and is wound on a filter carrier (5). Change separator insert according to one of the preceding claims,
characterized in that on the deposition medium (3) or on the filter carrier (5) contact electrodes (6) are arranged, which are electrically connected to the heating wire (4). Change separator insert according to claim 5,
characterized in that the contact electrodes (6) are respectively arranged on the end faces (7) of the Wechselabscheidereinsatzes (1). Exchange element insert according to one of claims 1 to 6,
characterized in that in the separator (2) electrodes are arranged, which produce an electrical connection with the contact electrodes (6) when installing the Wechselabscheidereinsatz (1). Exchange element insert according to claim 7,
characterized in that the electrodes are electrically connected to connection sockets on the outside of the separator (2). Exchange element insert according to claim 7 or 8,
characterized in that the separator (2) with the used Wechselabscheidereinsatz (1) deposits oil from a gas stream of a crankcase ventilation device of an internal combustion engine. Replacement filter insert according to one of the preceding claims,
characterized in that the heating is controlled by the control unit of the internal combustion engine. Exchange element insert according to one of claims 1 to 9,
characterized in that the heating is controlled by a temperature-dependent electrical resistance (PCT).

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