EP2225463B1 - Compresseur - Google Patents

Compresseur Download PDF

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Publication number
EP2225463B1
EP2225463B1 EP08863204.7A EP08863204A EP2225463B1 EP 2225463 B1 EP2225463 B1 EP 2225463B1 EP 08863204 A EP08863204 A EP 08863204A EP 2225463 B1 EP2225463 B1 EP 2225463B1
Authority
EP
European Patent Office
Prior art keywords
blade
valve plate
compressor
opening
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.)
Not-in-force
Application number
EP08863204.7A
Other languages
German (de)
English (en)
Other versions
EP2225463A1 (fr
Inventor
Marco Giacchi
Gernot Pfau
Franz-Josef Siebers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2225463A1 publication Critical patent/EP2225463A1/fr
Application granted granted Critical
Publication of EP2225463B1 publication Critical patent/EP2225463B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 a sheet covering an opening of the valve plate in a closed position, wherein a middle portion of the sheet which lies between a root of the blade fixed to the valve plate and a head of the blade closing the opening, facing a recess of the valve plate.
  • 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 patent US 4,955,797 shows a compressor housing comprising a motor consisting of a rotor and a stator. Centered in the engine is an aperture in which a crankshaft is arranged. The crankshaft is supported by means of a bearing. At a planar region of the bearing a recess is formed, in which a leaf spring is arranged.
  • the publication GB 1 246 256 shows a valve set for reciprocating compressor with a valve seat plate consisting of several stacked plates. Between two plates a flexible pressure plate is attached.
  • the patent US 2,908,287 shows a valve plate, wherein in a recess of the valve plate, a leaf valve is arranged.
  • 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 the blade located between a root of the blade fixed to the valve plate and a head of the blade closing the opening, facing a recess of the valve plate and the recess extending below the root. 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 blade so that fluid pressurized by the movement of the blade toward the valve plate can escape laterally out of the depression without unduly damping the movement of the blade.
  • 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 cross-sectional area of 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 shows by way of example the construction of a linear compressor for a refrigerator, 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 nozzles 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 pole pieces and serve to drive a swinging movement of the oscillating body 8.
  • a control circuit 37 supplies the Electromagnets 9 with an alternating current, whose frequency is adapted to the natural frequency of the oscillatory system, which is formed by the diaphragm springs 3, 4, the oscillating 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.
  • In order to exert a sufficiently high restoring force on 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 in Fig. 1 recognizable, divided into a main body 11, in which the reciprocating piston is guided to and fro, a valve plate 12 which forms an end wall of a recessed in the main body compression chamber, and a cap 13, on which the inlet and outlet ports 16, 17 are located ,
  • the structure of the cylinder is clearer by the exploded view of the Fig. 2 ,
  • the main body 11 is in the Fig. 2 omitted; 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 piston 32 has at its in the perspective of Fig. 2 Side facing away from the viewer to a longitudinal axis concentric projection 33 whose 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. At a top dead center of the movement of the reciprocating piston 32 when it almost touches the leaf spring 23 pressed against the valve plate 12 by the pressure prevailing in the compression chamber, 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, however, wherein the valve plate 12 with that of Fig. 2 is identical.
  • the cap 13 opposite surface of the valve plate 12.
  • a recess 39 is formed between the holes 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 ,
  • the presence of the stroke limiter 41 makes it possible, on the one hand, to use a very thin, extremely easily flexible material for the leaf spring 22, which withstands bending operations in the circumference permitted by the stroke limiter 41 for a long time without significant material fatigue.
  • the uniform curvature of the tongue 42 causes the tongue 27, when pressed against the stroke limiter 41 by fluid flowing out of the outlet bore 18, to assume a uniformly curved shape, thereby further reducing the material stress on the leaf spring 22.
  • Fig. 5 shows a further perspective detail view according to a second embodiment, with the in 3 and 4 can be combined shown.
  • 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.
  • the position of a spacer 44 placed on the ring 44 and a pipe section 48 is predetermined.
  • 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 From the cavity 50 via the holes 35 in the compressor chamber back flowing fluid forms a sliding layer on which the reciprocating piston 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, before the pressure of to recede into the compressor chamber inflowing fluid.
  • the thicknesses of the leaf spring 23 and the spacer ring 47 are greatly exaggerated in order to be able 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 away from the valve plate 12.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Claims (13)

  1. Compresseur comprenant une chambre de compresseur, dans laquelle un piston (32) est déplaçable, et une plaque porte-soupape (12) délimitant la chambre de compresseur, dans laquelle plaque porte-soupape (12) est formée au moins une soupape par une lamelle (22) recouvrant une ouverture (18) de la plaque porte-soupape (12) dans une position de fermeture, un évidement (39) de la plaque porte-soupape (12) étant situé à l'opposé d'une section médiane (40) de la lamelle (22), laquelle section médiane est située entre une racine (25) de la lamelle, fixée sur la plaque porte-soupape (12), et une tête de la lamelle (22), fermant l'ouverture (18), caractérisé en ce que l'évidement (39) s'étend jusqu'en dessous de la racine (25).
  2. Compresseur selon la revendication 1, caractérisé en ce que l'évidement (39) s'étend au-delà d'un bord de la lamelle (22).
  3. Compresseur selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la lamelle (22) est déplaçable dans une fente entre la plaque porte-soupape (12) et un élément (41) limiteur de course.
  4. Compresseur selon la revendication 3, caractérisé en ce que l'élément (41) limiteur de course est adjacent à la racine (25) de la lamelle (22) et est courbé de manière continue le long de la section médiane (44) de la lamelle (22).
  5. Compresseur selon la revendication 3 ou 4, caractérisé en ce que l'élément (41) limiteur de course et la lamelle (22) sont rivetés ensemble sur la plaque porte-soupape (12).
  6. Compresseur selon l'une quelconque des revendications précédentes, caractérisé en ce que le pied (25) de la lamelle (22) est fixé sur la plaque porte-soupape (12) par des rivets (24).
  7. Compresseur selon l'une quelconque des revendications précédentes, caractérisé en ce que la lamelle (22) est flexible de manière élastique et en ce que la position de fermeture est une position de repos de la lamelle (22).
  8. Compresseur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ouverture (18) est une ouverture de sortie de la chambre de compresseur.
  9. Compresseur selon la revendication 8, caractérisé en ce que l'ouverture (18) est disposée sur l'axe longitudinal de la chambre de compresseur et en ce qu'un piston (32) dans la chambre de compresseur tournant autour de l'axe de la chambre de compresseur porte une section de déplacement (33) ayant prise dans l'ouverture (18) dans une position de point mort.
  10. Compresseur selon la revendication 9, caractérisé en ce qu'une ouverture d'entrée (19) est disposée de manière excentrée dans la plaque porte-soupape (12).
  11. Compresseur selon la revendication 10, caractérisé en ce que l'ouverture d'entrée (19) s'étend de manière courbée autour de l'ouverture de sortie (18).
  12. Compresseur selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'ouverture est une ouverture d'entrée de la chambre de compresseur.
  13. Compresseur selon la revendication 12, caractérisé en ce que la lamelle (23) présente une ouverture centrale (28) qui est orientée vers une ouverture de sortie (18) formée dans la plaque porte-soupape (12).
EP08863204.7A 2007-12-18 2008-11-28 Compresseur Not-in-force EP2225463B1 (fr)

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 (fr) 2007-12-18 2008-11-28 Compresseur

Publications (2)

Publication Number Publication Date
EP2225463A1 EP2225463A1 (fr) 2010-09-08
EP2225463B1 true EP2225463B1 (fr) 2013-07-31

Family

ID=40352625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08863204.7A Not-in-force EP2225463B1 (fr) 2007-12-18 2008-11-28 Compresseur

Country Status (3)

Country Link
EP (1) EP2225463B1 (fr)
DE (1) DE102007060829A1 (fr)
WO (1) WO2009077303A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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 (fr) 1996-09-10 2000-04-11 Myung-Jung Hong Soupape de compresseur alternatif sous enveloppe
US7866961B2 (en) * 2004-12-06 2011-01-11 Daikin Industries, Ltd. Compressor with discharge valve arrangement

Also Published As

Publication number Publication date
WO2009077303A1 (fr) 2009-06-25
EP2225463A1 (fr) 2010-09-08
DE102007060829A1 (de) 2009-06-25

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