DE1183518B - Chiller - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: F 25 b

German class: 17 a-5

Number: 1183 518

File number: N 201001 a / 17 a

Filing date: May 26, 1961

Opening day: December 17, 1964

The invention relates to a refrigeration machine with a cylinder and a movable therein Piston, which separates a compression and an expansion space from each other, these two Rooms are connected to one another by means of two pipe systems, the expansion room with controlled Valves is provided as well as working medium from the compression to the expansion chamber through the first line system and through the second line system working medium from the expansion to the compression space flows.

Since in such a known refrigeration machine the effective in the expansion space and the one in one Moving pistons working in different cylinders in a further compression stage leads to this version a space-consuming and complicated design. In another known refrigerator with a double-acting expansion piston, this separates the expansion chamber from the compression chamber, so that the piston is always direction must be connected.

The type of refrigeration machine described at the beginning is now characterized by the special feature from that the compression space forms the last stage of a multi-stage compressor, one of which or there are several low-pressure stages in the second line system. So with this one double-acting expansion piston equipped refrigeration machine can be installed under the expansion piston available space can be used in an advantageous manner. Expansion space and compression space can then be arranged and need at a certain space-saving distance from one another to be connected to one another only by a few lines for the working medium. The at The mechanical work released by the expansion of the work equipment can be fully utilized and thereby the medium coming from the compression room can be further compressed.

If the compression space according to the invention is the last stage of a multi-stage compressor, the expansion space does not need to be connected to a drive device, the cylinder in which the expansion piston moves, is then almost vibration-free and can be at the shortest distance from Compression cylinder be arranged. These advantages apply both to a reciprocating compressor even with a rotating compressor.

In the drawing, an embodiment of the device according to the invention is shown schematically.

The compressor, which in this case is designed as a piston machine, is designated by I. II represents the Chiller

Applicant:

N. V. Philips' Gloeilampenf abrieken,

Eindhoven (Netherlands)

Representative:

Dipl.-Ing. H. Zoepke, patent attorney,

Munich 5, Erhardtstr. 11

Named as inventor:

Albert August Dros, Eindhoven

(Netherlands)

Claimed priority:

Netherlands May 30, 1960 (252139)

combined unit of the expansion space and the further compression space.

The piston engine I has a Zyünder 10, the with automatically opening and closing pressure and Suction valves 11 and 12 is provided. In the cylinder 10, the compression piston 13 is movable by means of a transmission, not shown.

The unit II has a schematically illustrated cylinder 14 in which the double-acting piston 15 is movable back and forth. This piston is provided with a piston rod 16 which is passed through a stuffing box is passed through the bottom 17 of the cylinder 14. The piston rod 16 goes over a straight guide 18 in a connecting rod 19 over. This is with a crank 20, which is part of a crankshaft 21 forms, connected.

In the cylinder 14, two spaces changing the volume in phase opposition can be distinguished, namely the room 22 above the Kolbea 15 and the room 23, in which in this case there is also a regenerator 24 and a heat exchanger 25 is located, is with a controlled inlet valve 26 and one also controlled exhaust valve 27 is provided. The space 23 under the piston 15 has an automatically opening and closing suction valve 28 and pressure valve 29.

The outlet of the cylinder 10 opens via the pressure valve 11 into a line 30 in which a cooler 31 is recorded. The purpose of this cooler is the gaseous compressed in the compression cylinder 10 Working medium in as much cooled condition as possible

409 758/96

to lead via the valve 28 into the space 23. The space just mentioned opens out via the pressure valve 29 in another line 31 α, in which a cooler 32 is also included, which is in the line 31a flowing gas in a cooled as much as possible State via the valve 26 to the space 22 in the cylinder 14 above the piston 15. In the end there is a line 33 at the point of the outlet through the valve 27 of the space 22, which carries the working medium again via the suction valve 12 to the compression cylinder 10.

When operating the machine, the z. B. gaseous working medium at room temperature, e.g., helium, compressed in compression cylinder 10 and in a compressed state the space 23 is supplied, with part of the heat supplied to the medium during compression in the Cooler 31 is removed. The compressed medium is then further compressed in space 23 and in this state is fed to the expansion space 22 via the cooler 32. A suitable choice of the Moment of opening and closing of the valve 26 is achieved that in the moment in which the compressed medium flows through the valve 26 into the space 22, the piston 15 is in the upper layer is located.

As a result of the expanding working medium, the piston 15 is moved downwards and is at the same time the working medium located in the space 23 under the piston is compressed. During the descending Stroke of the piston 15, the valve 26 is closed. At the end of the downward stroke of the piston 15 this moves up again due to the presence of a not shown Flywheel on the crankshaft 21. When the piston 15 goes up, the expanded gaseous Medium is removed from the space 22 and arrives again via the line 33 in the compressor.

When the gaseous working medium expands in space 22, it flows through regenerator 22, this medium leaving some of its heat in the regenerator. By cooling down the Medium during the expansion, the heat exchanger 25 is cooled so that one on the outside the freezer 25 flowing other medium can thereby be cooled. So this is where the Purposed refrigeration instead. When the medium flows out of the space 22 to the compressor takes this medium again uses part of the heat from the regenerator.

In the cooling system according to the invention, the advantage is obtained that the expansion capacity that when expanding the medium in the expansion space 22 is free, at least partially used to additionally compress the working medium. So it is not necessary to use an additional braking device on the expansion piston provided, as the one in the combination of the expansion space and the additional compression space existing double-acting piston is self-regulating.

The device according to the invention has the particular advantage that the units I and II only through a few flexible pipelines, if desired, need to be connected to one another, and so if desired, can be arranged at some distance from one another.

Claims (1)

Claim: Refrigeration machine with a cylinder and a piston movable therein, which has a compression and separates an expansion space from one another, these two spaces being connected to one another by means of two pipe systems are, the expansion space is provided with controlled valves and through the first pipe system Working medium from the compression to the expansion space and through the second line system Working medium flows from the expansion to the compression chamber, characterized in that that the compression space forms the last stage of a multi-stage compressor, one or more of which is low-pressure stages are present in the second line system. Considered publications: German Patent Specifications Nos. 323 950, 581 783. 1 sheet of drawings 409 758/96 12.64 © Bundesdruckerei Berlin