EP2225463A1 - Verdichter - Google Patents
VerdichterInfo
- Publication number
- EP2225463A1 EP2225463A1 EP08863204A EP08863204A EP2225463A1 EP 2225463 A1 EP2225463 A1 EP 2225463A1 EP 08863204 A EP08863204 A EP 08863204A EP 08863204 A EP08863204 A EP 08863204A EP 2225463 A1 EP2225463 A1 EP 2225463A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve plate
- opening
- compressor
- sheet
- compressor according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1066—Valve plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
- F04B53/1047—Flap valves the valve being formed by one or more flexible elements
Definitions
- the present invention relates to a compressor having a compressor chamber in which a piston is movable, and a valve plate delimiting the compressor chamber, in which at least one valve is formed by an opening which covers an opening of the valve plate in a closed position.
- a compressor having a compressor chamber in which a piston is movable, and a valve plate delimiting the compressor chamber, in which at least one valve is formed by an opening which covers an opening of the valve plate in a closed position.
- the sheet To close the opening tightly, the sheet must lie tightly in the closed position on the entire edge of the opening. This does not succeed if in the medium to be compressed entrained particles settle between the sheet and valve plate. From the presence of such particles resulting leaks lead to a significant loss of efficiency of the compressor and limit the achievable at its output pressure.
- the object of the present invention is to provide a compressor in which the likelihood that particles between the blade and the valve plate prevent the blade from sealing the opening is minimized.
- the object is achieved by providing, in a compressor with a compression chamber, in which a piston is movable, and a valve plate delimiting the compressor chamber, in which at least one valve is formed by a blade covering in a closed position of an opening of the valve plate, in a central portion of the sheet located between a root of the sheet fixed to the valve plate and a head of the sheet closing the opening, facing a recess of the valve plate. Due to the root-side fixation, the stroke of the blade becomes smaller and smaller as the compressor is operating from head to root. Therefore, in particular, particles stuck in the vicinity of the root between the valve plate and the blade can affect its sealing effect sensitive. However, the recess of the valve plate ensures that even between the little moving parts of the blade and the surface of the valve plate enough space is available so that particles can escape from this space.
- the recess extends to below the root itself and thus extends below that portion of the central portion whose mobility is the lowest and where, consequently, without the presence of the recess the Probability that a stuck particle can dissolve again is the least.
- the recess extends beyond an edge of the sheet so that fluid pressurized by the movement of the sheet toward the valve plate can escape laterally out of the recess without unduly dampening the movement of the sheet.
- the valve can quickly close upon a pressure change in the compression chamber, and a backflow of the valve, which would reduce the efficiency of the compressor is minimized.
- the blade is movable in a gap between the valve plate and a hubbegrenzenden element.
- the sheet can be kept at a small distance from the valve plate even with little or even vanishing inherent stiffness with the valve open, to ensure a fast closing when pressure changes.
- the low inherent rigidity required makes it possible to make the blade very thin, so that a long operating time of the compressor can be achieved without appreciable material fatigue of the blade.
- the stroke limiting element abut the root of the blade and be continuously curved along the central portion of the blade. As the sheet conforms to the stroke-limiting element in the open state, a uniform distribution of the bending stress over a large part of the sheet can be achieved.
- the hubbegrenzende element and the sheet can be rationally riveted together on the valve plate.
- key rivets are preferably used to fix the foot of the blade to the valve plate.
- the sheet is resiliently flexible and the closed position is a rest position of the sheet.
- the opening may be an outlet opening of the compression chamber.
- the opening is preferably located on the longitudinal axis of the compression chamber, and a piston rotatable in the compression chamber about the axis thereof carries a displacer portion which engages the opening in a dead center position to minimize the dead volume of the compression chamber.
- An inlet opening of the compressor chamber is then preferably arranged off-center in the valve plate. In order to maximize the Ouerterrorisms simulation the inlet opening, this preferably extends arcuately around the outlet opening.
- the opening which can be closed by the blade can also be an inlet opening of the compression chamber.
- the sheet expediently has a central opening which is aligned with an outlet opening formed in the valve plate.
- Fig. 1 is a perspective view of a linear compressor on which the present invention is realized
- FIG. 2 is an exploded view of parts of the compressor of FIG. 1 according to a first embodiment
- FIG. 3 is an enlarged detail of FIG. 2 according to a further developed second embodiment
- 5 shows a further perspective detail view according to a preferred embodiment
- 6 shows an axial partial section through the linear compressor.
- Fig. 1 shows an example of the structure of a linear compressor for a refrigeration device, which represents a preferred application of the invention.
- the linear compressor has a rigid, in plan view approximately U-shaped frame, which is composed of two flat wall pieces 1 and a sheet 2. Between two mutually facing end sides of the sheet 2 and the two wall pieces 1, a first diaphragm spring 3 is clamped, a second diaphragm spring 4 of the same shape as the diaphragm spring 3 is fixed to the side facing away from the sheet 2 of the wall pieces 1.
- the stamped from spring plate diaphragm springs 3, 4 each have four spring arms 5, which extend in a zigzag from the wall pieces 1 to a central portion 6, where they meet.
- the central portion 6 has two holes, two outer to which by means of screws or rivets 7, a permanent magnetic oscillating body 8 is suspended, and a central bore, through which in the diaphragm spring 3 a to the oscillating body 8 z.
- B. by screw fastened piston rod 10 extends.
- the piston rod 10 connects the oscillating body 8 with a reciprocating piston, not visible in the figure, in the interior of a cylinder 15, which is carried by the arch 2.
- Refrigerant inlet and outlet ports of the pumping chamber are designated 16 and 17, respectively.
- Two electromagnets 9 with E-shaped yoke and a wound around the middle leg of the E coil are each arranged between the oscillating body 8 and the wall pieces 1 with the oscillating body 8 facing pole pieces and are used for
- a control circuit 37 supplies the electromagnets 9 with an alternating current whose frequency to the
- Natural frequency of the oscillatory system is adjusted, which is formed by the diaphragm springs 3, 4, the vibrating body 8 and driven by him lifting piston.
- An unshown modification according to one or both diaphragm springs may be replaced by a leaf spring of substantially rectangular base, each of which an edge is attached to one end of one of the wall pieces 1 and whose opposite edge is fixed to the oscillating body 8.
- the opposite wall piece 1 carries in this modification, no spring element.
- Such a leaf spring must be very thin in order to be able to follow the movement of the oscillating body 8 sufficiently fatigue-free and can therefore exert only a small restoring force on the oscillating body 8.
- the restoring force is proportional to the resonant frequency of the oscillating body and thus to the throughput of the compressor.
- the oscillating body 8 in particular in the direction of vibration aligned, can be provided on train and pressure resilient coil springs.
- the cylinder 15 is, as seen in Fig. 1, divided into a main body 11 in which the reciprocating piston is reciprocally guided, a valve plate 12 which forms an end wall of a recessed in the main body compression chamber, and a cap 13, on the the inlet and outlet ports 16, 17 are located.
- the construction of the cylinder will be more apparent from the exploded view of Fig. 2.
- the main body 1 1 is omitted in Figure 2; the outline of the compressor chamber extending in the main body is indicated on the valve plate 12 as a dashed circle 14.
- the longitudinal axis of the compression chamber is shown in dash-dotted line.
- a circular outlet bore 18 is arranged exactly coaxially with the longitudinal axis.
- a circular arc-shaped slot extends about an angle of about 120 ° around the outlet bore 18 around and forms an inlet opening 19 of the compression chamber.
- FIG. 1 Further holes 20 at the corners of the valve plate 12 are provided to receive screws, not shown, with which the valve plate 12 and the cap 13 are secured to the main body 11.
- Two further bores 21 are used for fastening two leaf springs 22 and 23 to the valve plate 12 with the aid of fitting rivets 24.
- the leaf springs 22, 23 together with the inlet opening 19 and the outlet bore 18 respectively inlet and outlet valves of the compressor chamber.
- the leaf springs 22, 23 each have an elongated root 25 in which complementary to the holes 21 Holes 26 are formed for the fitting rivets 24, and one of the root 25 to the longitudinal axis projecting elastic tongue 27th
- an opening 28 is cut, which, when the leaf spring 23 is riveted to the valve plate 12, the outlet hole 18 leaves free.
- the tongue 27 of the leaf spring 22 abuts against the outlet bore 18 from the outside, with its tip acting as a shut-off valve of the outlet valve.
- the interior of the cap 13 is divided by an intermediate wall 29 into a suction-side cavity 30 and a pressure-side cavity 31, to which the refrigerant inlet nozzle 16 or outlet nozzle 17 opens and which communicate with the compressor chamber via the inlet opening 19 and the outlet bore 18, respectively.
- the designated with 32 reciprocating piston has on its side facing away from the viewer in the perspective of FIG. 2 a concentric projection 33 to the longitudinal axis, the length and diameter of the common thickness of the valve plate 12 and the leaf spring 23 and the diameter of the outlet bore 18 correspond.
- the projection 33 enters the outlet bore 18 and displaces residual gas contained therein.
- FIG. 3 shows a perspective view of a preferred modification of the compressor according to the invention, wherein, however, the valve plate 12 is identical to that of Fig. 2.
- FIG. 3 shows the surface of the valve plate 12 which faces away from the viewer in the perspective of FIG. 2 and lies opposite the cap 13.
- a recess 39 is formed between the bores 21 on the one hand and the outlet bore 18 on the other hand.
- the outline of the leaf spring 22 is recorded as a dotted line on the surface of the valve plate 12, so that it can be seen that the recess 39 extends for the most part under a root near section 40 of the tongue 27 and to a lesser extent also below the root 25.
- the recess 39 is thus largely under a portion of the leaf spring 22, which, when in the operation of the compressor, the tongue 27 moves back and forth, little moves, and if the surface of the valve plate 12 would be flat, with this a narrow, to the root 25 would form towards tapering gap.
- the recess 39 prevents particulates entrained in the fluid compressed by the compressor from becoming trapped between the leaf spring 22 and the valve plate 12 and thus adversely affecting the valve action of the leaf spring 22.
- the recess 39 is slightly wider than the tongue 27, so that by the movement of the tongue 27 in the recess 39 pushed-in fluid can easily escape in the lateral direction ,
- Fig. 3 The preferred further development shown in Fig. 3 is based on the fact that not only the leaf spring 22 is riveted on the surface shown the valve plate 12, but in addition a hubbegrenzendes element 41, here in the form of a congruent with the leaf spring 22 rigid plate whose tongue 42nd is evenly curved so that its tip projects obliquely from the valve plate 12.
- a root of the stroke limiter 41 is secured to the valve plate by the rivets 24, as can be seen in particular in the sectional view of FIG. 4, and the root of the leaf spring 22 is fixed between the stroke limiter 41 and the valve plate 12.
- FIG. 5 shows a further perspective detailed view according to a second development, which can be combined with that shown in FIGS. 3 and 4.
- the leaf spring 23, which covers the inlet opening 19, is embodied integrally here in one piece with a ring 44 bearing against the valve plate 12.
- the position of the ring 44 on the valve plate 12 is predetermined by two pins 45 which are inserted through two holes 46 of the ring 44 into blind holes of the valve plate 12.
- a circumferential collar of the pipe section 48 includes the blind holes of the valve plate 12 complementary holes that receive the pins 45.
- the pipe section 48 forms the outer wall of the compression chamber.
- a plurality of grooves 49 is formed, from the bottom of each extend a plurality of very fine radial holes 35 to the compressor chamber.
- the pipe section 48 is surrounded by an annular cavity 50. This communicates via a bore 36 of the valve plate (see Fig. 2) with the pressure-side cavity 31 of the cap 13. From the cavity 50 via the holes 35 in the compressor chamber back flowing fluid forms a sliding layer on which the reciprocating 32 without friction, without contact with the pipe section 48, moves.
- the section holder ring 47 in the vicinity of the root of the leaf spring 23, a cutout 51, which allows the thin webs 34 which connect the arcuate end portion 38 of the tongue with the ring 44, over its entire length to recede prior to the pressure of fluid flowing into the compression chamber.
- the thicknesses of the leaf spring 23 and the spacer ring 47 are greatly exaggerated in order to clearly show them; Nevertheless, it is clear that here the valve plate 12 facing end face of the pipe section 48 may act as a Hubbegrenzer which supports the narrow webs 34 on a portion of their length when flowing fluid into the compressor chamber, the leaf spring 23 presses from the valve plate 12 away.
- the compressor is always driven by a linearly oscillating drive unit
- the described compressor chamber is also suitable for being driven by a rotating motor via a connecting rod.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710060829 DE102007060829A1 (de) | 2007-12-18 | 2007-12-18 | Verdichter |
| PCT/EP2008/066398 WO2009077303A1 (de) | 2007-12-18 | 2008-11-28 | Verdichter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2225463A1 true EP2225463A1 (de) | 2010-09-08 |
| EP2225463B1 EP2225463B1 (de) | 2013-07-31 |
Family
ID=40352625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08863204.7A Not-in-force EP2225463B1 (de) | 2007-12-18 | 2008-11-28 | Verdichter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2225463B1 (de) |
| DE (1) | DE102007060829A1 (de) |
| WO (1) | WO2009077303A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB392811A (en) * | 1932-10-03 | 1933-05-25 | Teves Kg Alfred | Improvements in electromagnetically actuated gas compressors |
| US2908287A (en) | 1957-09-04 | 1959-10-13 | Bendix Westinghouse Automotive | Compressor valve structure |
| AT290000B (de) | 1969-02-10 | 1971-05-10 | Hoerbiger Ventilwerke Ag | Ventilsatz für Kolbenverdichter |
| US4955797A (en) | 1989-02-15 | 1990-09-11 | Tecumseh Products Company | Valve indexing for a compressor |
| DE4039786C2 (de) * | 1990-12-13 | 1995-01-12 | Danfoss Flensburg Gmbh | Hubkolbenverdichter mit vermindertem Totraum |
| CA2185183C (en) | 1996-09-10 | 2000-04-11 | Myung-Jung Hong | Valve apparatus of enclosed reciprocating compressor |
| US7866961B2 (en) * | 2004-12-06 | 2011-01-11 | Daikin Industries, Ltd. | Compressor with discharge valve arrangement |
-
2007
- 2007-12-18 DE DE200710060829 patent/DE102007060829A1/de not_active Withdrawn
-
2008
- 2008-11-28 EP EP08863204.7A patent/EP2225463B1/de not_active Not-in-force
- 2008-11-28 WO PCT/EP2008/066398 patent/WO2009077303A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009077303A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007060829A1 (de) | 2009-06-25 |
| EP2225463B1 (de) | 2013-07-31 |
| WO2009077303A1 (de) | 2009-06-25 |
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