Rotary compressor

Abstract

The invention relates to a rotary compressor, comprising:-a cylinder chamber, which is delimited in the radial direction by a cylinder disk (2, 3) and in the axial direction by a cover disk (4), which lies against an axial end face (9, 12) of the cylinder disk; a piston (15) rotating in the cylinder chamber; -a partition slide (16) dividing the cylinder chamber into a suction chamber (18) and a pressure chamber (19); an outflow channel (21) starting from the pressure chamber, said outflow channel having a first channel section (22) extending in the cylinder disc and a second channel section (23) extending in the cover disc; and a reed valve (26) arranged in the cover disc, which reed valve separates the first channel section and the second channel section from one another in the closed state and connects the first channel section and the second channel section to one another in the open state. The reed valve is in sealing contact with the axial end face of the cylinder disc in the closed state.

Description

Technical Field

[0001] The present invention relates to a rotary compressor, which comprises:

[0002] - a cylinder chamber, which is bounded radially by a cylinder disk and axially by a cover disk, and the cover disk abuts against the axial end face of the cylinder disk,

[0003] - a piston rotating in the cylinder chamber,

[0004] - a separating slider, which divides the cylinder chamber into a suction chamber and a pressure chamber,

[0005] - an outflow channel starting from the pressure chamber, which has a first channel section extending in the cylinder disk and a second channel section extending in the cover disk,

[0006] - and a reed valve (Flatterventil) arranged in the cover disk, which separates the first channel section and the second channel section from each other in the closed state and connects them to each other in the open state. Background Art

[0007] This type of rotary compressor as a refrigerant compressor is known from US2021 / 019 0072A1. This is a so-called rolling piston compressor, in which the separating slider is guided linearly in the compressor housing and is sealed relative to the piston at the end side, and the piston rotates eccentrically in the cylinder chamber and rolls on the inner surface of the cylinder disk here. The rolling piston compressor is a three-cylinder machine and includes a corresponding number of cylinder disks, which have cylinder chambers, and the cylinder chambers are bounded axially on both sides by cover disks abutting against the cylinder disks. A reed valve (also called a thin plate valve) is arranged in each cover disk, which opens when the pressure difference between the first channel section and the second channel section is exceeded, while the piston pushes the compressed refrigerant into the outflow channel. To prevent the refrigerant from flowing back, the reed valve closes when the pressure difference is lower, and seals against a valve seat formed in the cover disk. Summary of the Invention

[0008] The object on which the present invention is based is to structurally simplify a rotary compressor of the type described at the beginning.

[0009] The solution to the object results from the features of claim 1. Therefore, the reed valve should be in sealing contact with the axial end face of the cylinder disk in the closed state. The structural simplification is mainly achieved in such a way that for the purpose of the required component precision, the axial end face of the cylinder disk always has to be machined and correspondingly has a surface quality sufficient for the sealing function of the reed valve as a valve seat. Description of the Drawings

[0010] Other features of the present invention will become apparent from the following description of the main components of the rotary compressor according to the present invention and the accompanying drawings. The drawings show:

[0011] Figure 1 The components are shown in a three-dimensional exploded view,

[0012] Figure 2 Partially enlarged cross-sections show the Figure 1 cylinder disc and the cover disc,

[0013] Figure 3 The partial view of the cover disc according to Figure 2 is shown as a single component in three dimensions with reed valves,

[0014] Figure 4 The cover disc according to Figure 2 is shown as a single component in three dimensions without reed valves,

[0015] Figure 5 A longitudinal cross-section through the pair of reed valves is shown. Detailed Description

[0016] To understand the present invention, Figure 1 and Figure 2 show the main components of a rotary compressor implemented herein as a wobble piston compressor. In the illustrated embodiment, the rotary compressor is a two-cylinder machine for compressing refrigerant. An electric drive eccentric shaft 1, two cylinder discs 2 and 3, a cover disc 4 axially disposed between the cylinder discs, and two closing discs 5 and 6 are shown. The discs shown in the exploded view are stacked one on top of the other without gaps in the installed state, wherein the discs abut each other in pairs with their axial end faces 7 and 8, 9 and 10, 11 and 12, and 13 and 14. The cylinder discs 2, 3 radially delimit cylinder chambers, which are axially delimited on one side by the cover disc 4 and on the other side by the closing disc 5 or 6. A piston 15 driven by the eccentric shaft 1 with an offset of 180° and the drawn rotation direction rotates in each cylinder chamber. A partition slider 16 combines with a rotary sliding hinge 17 to divide the cylinder chamber into a suction chamber 18 and a pressure chamber 19. The partition slider is an integral part of the piston 15 in the case of the present wobble piston compressor.

[0017] During the first revolution of the piston 15, the refrigerant to be compressed is sucked into the expanding suction chamber 18 via an inflow channel 20 extending radially in the cylinder disc 2 or 3, compressed during the subsequent revolutions of the piston 15, and finally pushed out from the pressure chamber 19 into an outflow channel 21. In Figure 1The outflow channel 21, symbolically represented by a dashed line therein, includes a first channel section 22 and a second channel section 23. The first channel section extends in the cylinder disk 2 or 3 starting from the pressure chamber 19, and the second channel section extends in the cover disk 4. The outflow channel 21 is formed in a further course by longitudinal holes 24 and 25 in the cylinder disk 3 or the closing disk 6.

[0018] A reed valve 26 is respectively present between the two channel sections 22 and 23. The reed valve separates the first channel section 22 and the second channel section 23 from each other in the closed state and connects them to each other in the open state. The reed valve 26 is a flat spring plate, which is arranged in the cover disk 4 and in the closed state mostly and currently fully abuts against the machined axial end faces 9 and 12 of the cylinder disk 2 or 3. Here, the valve disks 27 formed at the reed valve 26 are in sealing contact with the axial end faces 9 or 12 respectively and close the first channel section 22 leading there (see Figure 5 ), and the axial end faces are respectively locally used as valve seats for the valve disks 27.

[0019] From Figures 3 to 5 the structural design of the reed valve 26 can be known in more detail. The figure shows different views of the reed valve 26. The cover disk 4 is penetrated by a longitudinal hole 28. In the longitudinal hole, a pressure spring 29 is clamped between the spring disks 30 of the two reed valves 26, and the pressure spring exerts a force on the axial end faces 9 and 12 of the cylinder disk 2 or 3. In the (deformed) open state of each reed valve 26, the elastically deformable valve disk 27 abuts against a stop 31, and the stops are respectively an integral part of the cover disk 4. The position-fixed positioning of each reed valve 26 in the cover disk 4 is achieved by the longitudinal hole 28 and a clearance 32 starting from the longitudinal hole in the cover disk 4. The spring disks 30 and the protrusions 33 starting from the spring disks are substantially complementarily surrounded in the longitudinal hole and the clearance.

Claims

1. A rotary compressor, comprising: a cylinder chamber which is delimited radially by a cylinder disk (2, 3) and axially by a cover disk (4), which rests on an axial end face (9, 12) of the cylinder disk (2, 3), - a piston (15) rotating in the cylinder chamber, - a dividing slide (16) which divides the cylinder chamber into a suction chamber (18) and a pressure chamber (19), an outflow channel (21) starting from the pressure chamber (19), the outflow channel having a first channel section (22) extending in the cylinder disk (2, 3) and a second channel section (23) extending in the cover disk (4), and a reed valve (26) arranged in the cover disk (4), which separates the first channel section (22) and the second channel section (23) from one another in a closed state and connects them to one another in an open state, It is characterized in that the reed valve (26) is in sealing contact with the axial end faces (9, 12) of the cylinder disk (2, 3) in the closed state.

2. The rotary compressor according to claim 1, characterized in that, The reed valve (26) is a flat spring plate which, in the closed state, bears mostly or over its entire surface against the axial end faces (9, 12) of the cylinder disks (2, 3).

3. The rotary compressor according to claim 1 or 2, characterized in that, The rotary compressor is a multi-cylinder machine, which has a plurality of cylinder disks (2, 3) and at least one cover disk (4) axially arranged between the cylinder disks, the cover disk being in contact with the axial end faces (9, 12) of the cylinder disks (2, 3), and the rotary compressor includes a reed valve (26) arranged in the cover disk (4), the reed valve being in sealing contact with the axial end faces (9, 12) of the cylinder disks (2, 3) in the closed state and connecting the first channel section (22) with the second channel section (23) in the open state.

4. The rotary compressor (1) according to claim 3, characterized in that, The reed valve (26) is subjected to a force against the axial end faces (9, 12) of the cylinder disks (2, 3) by a compression spring (29) axially clamped between the reed valves.

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