DE2805765A1 - Multi-path reversing slide valve - has ferromagnetic rod with thickened end section for penetration into housing face side coils - Google Patents

Abstract

The multiple path reversing slide valve has a cylindrical housing in which a slide body is displaceable. To improve the seal in the assembly a flat sealing surface (c) is provided between the housing (2) and the body (1). At either end of the slide body a rod (3) of ferro-magnetic material is provided, by which the body is movable with the aid of electro-magnets positioned on either side of the slide housing. Coils (4) are fitted to tubular extensions on the face side of the slide housing, into which the rods with the piston thickened sections penetrate.

Description

PATENT LAWYERS

DR. ERNST STURM ■, j, - -r ^ - ^ ji ^ r. + ^DR HORST REINHARD

Applicant: Instxtutul de Cercetan _DIPL . _ING ka _RL . _{Jürgen Kreutz}

si Modernizari Energetice:

(ICEMENERG)

8000 Munich 40, Leopoldstrasse 20 / IV Telephone: (089) 39 6451

Telegram: Isarpatent Bank: Deutsche Bank AG Munich Account no. 21/14171 (bank code 70070010) Postal check: Munich 97 56-809

Date February 10, 1978 Kr / h

Reusable reversing slide

The invention relates to a multi-way reversing slide for reversing the direction of flow of a working medium, for example of Freon gas in reversible conditioning systems, i.e. air conditioning systems or cooling systems or even heat pumps.

From FR-PS 2 103 982 a distribution slide for reversing the direction of flow of a liquid is already known is provided with a final drawer, the seal is made by an elastic seal.

With the known slide the direction of flow can be reversed However, it is disadvantageous that several surfaces have to be sealed, which occur if the seal is inadequate

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Pressure losses, which leads to a corresponding reduction in the performance of the compressor. Also makes the control of the known Slide's difficulties.

The multi-way reversing slide according to the invention eliminates the disadvantages of the known slide in that for the purpose of improvement the sealing of the valve body is provided with a flat sealing surface and at both ends each owns a rod made of ferromagnetic material which the slide body is displaceable by means of electromagnets attached on both sides.

An exemplary embodiment is described below with reference to the drawing. The drawing shows a longitudinal section through the slide according to the invention.

A slide body 2 is displaceable in the slide housing 1. On the slide body 2 iron bars 3 are attached on both sides, which are each in a bore of a coil core extend into it. A coil 4 is attached to this tubular coil core, so that the slide body can be moved to the left or right. The push rods 3 (iron rods) have piston-like ends at their ends Pieces of iron that act as anchors. The tubular coil cores are - preferably in one piece - on the covers or end faces of the valve housing 1 attached. The holes in the coil core "are in with the slide chamber

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Connection, will therefore be filled by the working medium, so that at the same time a damping effect is given, at very compact, simple structure. The anchors or the bumpers with the anchor parts sitting on their ends are simple inserted into bores at the ends of the slide body 2 and fastened there by means of spring washers.

The valve housing 1 has a top on the high pressure side of the compressor od. The like. Inlet 5 to be connected. Opposite the inlet 5 are on the underside of the valve body 1 three connections 6a, 6b, 6c arranged at the same distance from one another. The interior b of the shell-like Slider body 2 each covers 2 of the connections 6a, 6b, 6c in the position shown are therefore through the slider body 2 the connections 6a, 6b connected to one another, while the working fluid from the inlet 5 via the space a outside the Slide body 2 reaches the connection 6c directly.

The return line to the compressor or the like is connected to the middle connection 6b.

In the drawn ». Position, the work equipment flows from inlet 5 via connection 6c to a heat exchanger, through the heat exchanger or the like, back via connection 6a and from here via the slide interior b to connection 6b and from there back to the compressor.

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When the control coils 4 are actuated, the slide is switched over and the working medium then flows from the inlet 5 via the connection 6a to the heat exchanger and back via connections 6c, 6b - which are now connected to one another through the slide interior b to the compressor.

As mentioned, the seal between the high pressure space a outside the slide body 2 and the low pressure space is critical b inside the valve body. According to the invention the slide is very simple, this trick also simplifies the sealing problem. And that is the slide, as can be seen, is designed as a flat slide or shell slide. The connections 6a, 6b, 6c open into one Connection plate 7, the top c of which is polished and is thus designed as a flat sliding surface for the slide. With the polished sliding surface c cooperating, relatively narrow sealing surfaces on the underside of the slide body 2 are provided with graphitic Teflon (a heat-insulating, non-metallic material). This material must have the Withstand pressure differences between rooms a, b and must not allow any heat exchange between the two rooms. By the relatively large top is the slide body 2 with sufficient Sealing pressure pressed against the sliding surface c. The connection plate 7 can be relatively simple before attachment the housing end wall into the tubular jacket of the housing 1 be inserted, so that there is a simple structure.

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Both of the case caps on their tubular projections the coils 4 are applied, are each attached to the casing of the housing by means of a circumferential weld seam. The connections 5, 6a, 6b, 6c are designed as welded-in nozzles. The lower nozzles (connections 6a, 6b, 6c) are with the housing jacket and welded to the connection plate 7 at the same time.

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Claims (1)

Claims 1.) Multi-way reversing slide with a substantially cylindrical housing in which a slide body is displaceable, characterized in that, that to improve the seal, a flat sealing surface (c) between the valve body (2) and valve body (l) is provided, and that a rod (3) made of ferromagnetic material is provided at both ends of the slide body (2) is through which the slide body by means of an electromagnet attached to each side of the slide housing (l) (4) is movable. 2. Slider according to claim 1, characterized in that that the coils (4) are mounted on tubular extensions of the end faces of the slide housing (l), in which the with each 909833/0220 immerse ferromagnetic rods (3) provided at the end of a piston-like thickening. o. Slider according to claim 2, characterized in that that the ferromagnetic Stangeu (3) in a hole at each one end face of the slide body (2) and fastened by means of a spring ring or the like. 4. Slider according to one of claims l to 3, characterized in that three connections (6a, 6b, 6c) wind into a common base plate (7), the surface of which is polished as a sliding surface (c), and that with the sliding surface ( c) cooperating sealing surfaces of the slide body (2) with Teflon or the like. Are provided. 909833/0220