DE102024103000A1 - Refrigerant compressor - Google Patents

Abstract

A refrigerant compressor (1) is proposed, comprising:
- a compressor housing (2),
- a compression chamber (3) running within the compressor housing,
- an inlet channel (8) for the refrigerant to be compressed, running in the compressor housing and opening into the compression chamber,
- an outlet channel (9) for the compressed refrigerant running in the compressor housing and opening into the compression chamber,
- and a flutter valve (12) arranged in the inlet channel or outlet channel, which prevents a backflow of the refrigerant to be compressed from the compression chamber into the inlet channel or a backflow of the compressed refrigerant from the outlet channel into the compression chamber and which has a valve plate (13) resting against a valve seat (14) when the flutter valve is closed.
The valve seat is formed on a component separate from the compressor housing, which rests on a housing component (17) of the compressor housing.

Description

• - ein Verdichtergehäuse,
• - einen innerhalb des Verdichtergehäuses verlaufenden Verdichtungsraum,
• - einen im Verdichtergehäuse verlaufenden und im Verdichtungsraum mündenden Einlasskanal für das zu verdichtende Kältemittel,
• - einen im Verdichtergehäuse verlaufenden und im Verdichtungsraum mündenden Auslasskanal für das verdichtete Kältemittel,
• - und ein im Einlasskanal oder Auslasskanal angeordnetes Flatterventil, das ein Rückströmen des zu verdichtenden Kältemittels aus dem Verdichtungsraum in den Einlasskanal beziehungsweise ein Rückströmen des verdichteten Kältemittels aus dem Auslasskanal in den Verdichtungsraum verhindert und das eine im geschlossenen Zustand des Flatterventils an einem Ventilsitz anliegende Ventilplatte hat.

The invention relates to a refrigerant compressor comprising:

• - a compressor housing,
• - a compression chamber running within the compressor housing,
• - an inlet channel for the refrigerant to be compressed, running in the compressor housing and opening into the compression chamber,
• - an outlet channel for the compressed refrigerant running in the compressor housing and opening into the compression chamber,
• - and a flutter valve arranged in the inlet channel or outlet channel, which prevents a backflow of the refrigerant to be compressed from the compression chamber into the inlet channel or a backflow of the compressed refrigerant from the outlet channel into the compression chamber and which has a valve plate which rests against a valve seat when the flutter valve is closed.

Flute valves are known as check valves that determine the direction of the refrigerant flow on the inlet side into the compression chamber or on the outlet side out of the compression chamber of a refrigerant compressor, in particular oscillating piston, orbital piston or scroll compressors, and prevent reverse flow. In generic refrigerant compressors, such as those from the WO 2023/166604 A1 or the US4978285 A As is known, the valve seat of the flutter valve is formed by a circular ring-shaped elevation that is molded directly onto a component of the compressor housing.

The present invention is based on the object of structurally improving a refrigerant compressor of the type mentioned above.

The solution to this problem is provided by the features of claim 1. Accordingly, the valve seat is to be molded onto a component separate from the compressor housing, which rests on a housing component of the compressor housing. Isolating the valve seat function from the comparatively massive housing components into the separate component facilitates the manufacturing process and compliance with component tolerances, which are correspondingly small due to the high precision of the delicate valve seat with regard to sealing and the opening and closing behavior of the reed valve.

The valve seat can be formed on an investment cast or sintered part, but is preferably formed on a sheet metal part to reduce manufacturing costs. To improve the sealing and acoustic properties of the reed valve, it can also be coated with elastomer, at least in the contact area of the valve seat and in the area where it contacts the housing component.

• 1 das Flatterventil in perspektivischem Längsschnitt;
• 2 einen prinzipiell bekannten Kältemittelverdichter in schematischer Darstellung.

Further features and explanations of the invention will become apparent from the following description and the drawings showing an embodiment of a flutter valve according to the invention. They show:

• 1 the flutter valve in perspective longitudinal section;
• 2 a basically known refrigerant compressor in a schematic representation.

To begin with, 2 explained, which shows the diagram of a fundamentally known refrigerant compressor 1. The refrigerant compressor 1, designed here as an oscillating piston compressor, comprises a compressor housing 2, a compression chamber 3 running therein, and a compressor piston 4, which rotates in the direction of rotation shown in the compression chamber 3. The compression chamber 3 is divided by the compressor piston 4 into a pressure chamber 5 and a suction chamber 6, which are separated from one another by a separating slide 7 forming part of the compressor piston 4, and whose volumes can be varied according to the rotational position of the compressor piston 4. The refrigerant to be compressed flows into the suction chamber 6 via an inlet channel 8 running in the compressor housing 2 and opening into the compression chamber 3, and the compressed refrigerant flows out of the pressure chamber 5 via an outlet channel 9 running in the compressor housing 2 and opening into the compression chamber 3; See arrow directions. A check valve 10 arranged in the inlet channel 8 prevents the refrigerant to be compressed from flowing back from the suction chamber 6 into the inlet channel 8. A check valve 11 arranged in the outlet channel 9 prevents the compressed refrigerant from flowing back from the outlet channel 9 into the pressure chamber 5.

One of the check valves 10, 11 is a flutter valve 12, as shown in 1 is shown. The reed valve 12 has a valve plate 13, which in the illustrated closed state of the reed valve 12 rests against a valve seat 14, and a valve stop 15, against which the valve plate 13 rests for the purpose of limiting the stroke and deformation in the fully open state of the reed valve 12. The valve seat 14 is connected to a compressor housing 2 (see 1 ) separate component and in this case formed on a sheet metal part 16 which is mounted on a compression chamber 3 (see 1 ) limiting housing component 17 of the compressor housing 2. The valve stop 15, the valve plate 13 and the sheet metal part 16 are connected, for example, by means of a point welded joint to form a ready-to-assemble and fail-safe unit, which can be fastened to the housing component 17 by means of a screw connection passing through screwing points 18 and 19.

The valve seat 14 defines a circular flow opening 20 for the refrigerant, which is aligned with a likewise circular flow opening 21 in the housing component 17, and is formed by a circular offset 22 of the sheet metal part 16, spaced from the housing component 17. The offset 22 has a convexly curved contact surface 23 with the valve plate 13, with the highest elevation of the contact surface 23 being in edge-support-free linear contact with the valve plate 13 when the flutter valve 12 is closed.

The valve plate 13 is spring-hardened and (in its undeformed state) a completely flat sheet metal part. The height offset created by the offset 22 between the flat valve plate 13 and the offset sheet metal part 16 is compensated in the area of the screwing points 18 and 19 by two additional perforated offsets 24 and 25 of the sheet metal part 16.

The sheet metal part 16 can be coated with an elastomer for the purpose of improved sealing effect and more favorable acoustics (at least) in the area of the system 23 and in the support area 26 to the housing component 17.

QUOTES CONTAINED IN THE DESCRIPTION

This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2023/166604 A1 [0002]
• US 4978285 A [0002]

Claims (7)

Refrigerant compressor (1), comprising: - a compressor housing (2), - a compression chamber (3) running within the compressor housing (2), - an inlet channel (8) for the refrigerant to be compressed, running in the compressor housing (2) and opening into the compression chamber (3), - an outlet channel (9) for the compressed refrigerant, running in the compressor housing (2) and opening into the compression chamber (3), - and a flutter valve (12) arranged in the inlet channel (8) or outlet channel (9), which prevents a backflow of the refrigerant to be compressed from the compression chamber (3) into the inlet channel (8) or a backflow of the compressed refrigerant from the outlet channel (9) into the compression chamber (3) and which has a valve plate (13) resting against a valve seat (14) in the closed state of the flutter valve (12), characterized in that the valve seat (14) is formed on a component separate from the compressor housing (2) which rests on a housing component (17) of the compressor housing (2). Refrigerant compressor (1) according to Claim 1 , characterized in that the valve seat (14) is formed on a sheet metal part (16). Refrigerant compressor (1) according to Claim 2 , characterized in that the sheet metal part (16) is coated with elastomer at least in the contact area of the valve seat (14) and in the support area (26) to the housing component (17). Refrigerant compressor (1) according to Claim 2 or 3 , characterized in that the valve seat (14) is formed by a circular crank (22) of the sheet metal part (16) which is spaced from the housing component (17). Refrigerant compressor (1) according to Claim 4 , characterized in that the crank (22) has a convexly curved contact (23) with the valve plate (13), with which the valve plate (13) is in line contact when the flutter valve (12) is in the closed state. Refrigerant compressor (1) according to one of the preceding claims, characterized in that the valve plate (12) rests against a valve stop (15) in the fully open state of the flutter valve (12). Refrigerant compressor (1) according to Claim 6 , as far as Claim 2 referred back, characterized in that the valve stop (15), the valve plate (13) and the sheet metal part (16) are joined to form a structural unit.