US3600110A - Hermetically enclosed refrigerating machine - Google Patents

Hermetically enclosed refrigerating machine Download PDF

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Publication number
US3600110A
US3600110A US23083*[A US3600110DA US3600110A US 3600110 A US3600110 A US 3600110A US 3600110D A US3600110D A US 3600110DA US 3600110 A US3600110 A US 3600110A
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US
United States
Prior art keywords
chambers
hermetically enclosed
refrigeration compressor
compressor unit
unit 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.)
Expired - Lifetime
Application number
US23083*[A
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English (en)
Inventor
Bendt Wegge Romer
Lars Meisingset
Knud V Valbjorn
Jorgen Dahlman Knudsen
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Danfoss AS
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Danfoss AS
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Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
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Publication of US3600110A publication Critical patent/US3600110A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0072—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes characterised by assembly or mounting
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections

Definitions

  • the sound reducing chambers are shallow in construction and have a common interior wall which extends upwardly between the cylinder and head of the compressor where it forms a part of the valving. Another wall of the sound reducing chambers also extends upwardly and forms a part of the cylinder head.
  • SHEET 1 or 2 PATENTEU Aus1 nan SHEET 2 (IF 2 FIG 4 HERMETICALLY ENCLOSED REFRIGERATING. MACHINE
  • the invention relates to a hermetically enclosed refrigerating machine having at least two chambers for reducing the sound due to pressure effects, which are formed of sheet metal shaped parts positioned one upon the other and which are secured to the cylinder by extending at least one of the sheet metal shaped parts.
  • two sheet metal shaped parts which include a thinner sheet extending between them, form the cylinder head, plus suction-valve chambers and the pressure-valve chamber, a first sound-reducing chamber being disposed at a distance below and a second sound-reducing chamber, again at a distance beneath.
  • the pressure and suction-valve chambers are separated from each other by means of the thinner plate and throttling passages are formed along the length of the pressure pipe. Due to the mounting on the cylinder, such pressure reducing means is secured in a manner that is reliable and free from vibration. it can therefore also be accommodated in a relatively narrow gap between the case and the motor. Difficulties occur, however, if it is required further to increase the size of sound-reducing means consisting of two or more chambers, as would be required for reducing the frequency limits.
  • the object of the invention is to arrange, in a refrigerating machine of the above-mentioned kind, the two or more soundreducing chambers in such a way that the volume can be utilized in an optimum manner in sound-reducing means of prescribed exterior dimensions.
  • this object is achieved by the surfaces of the bases of the sound-reducing chambers lying one against the other and their heights at right angles thereto being small in relation to the dimensions of the surfaces. of the bases.
  • the noise-reducing chambers are thus of extremely shallow construction and are positioned one directly upon the other. Their height is generally less than one-third of the smallest dimension of the surface of the base. The sum of the individual heights does not need to be greater than the height of noisereducing chambers that have been proposed in the past. Despite the small heights, a sufficiently large volume of chamber can be obtained because of the large base surface.
  • the individual chambers completely fill the available space, in contrast to an arrangement wherein the chambers are formed in a vertical row between two sheet-metal shaped parts. space necessarily being sacrificed between the' sidewalls of the chambers.
  • a further simplification is achieved if two adjacent noisereducing chambers have a common middle plate which, together with a channel plate contiguous therewith, forms at least the throttle passages that have to be provided between the two noise-reducing chambers.
  • the middle plate and the channel plate can here be covered on both sides by a cupshaped piece of sheet metal, so as to produce two shallow noise-reducing chambers on both sides of the middle plate.
  • a further increase in volume is obtained by positioning the pressure-valve body made of strip, obliquely between two suction-valve chambers in the cylinder head and locating its fixing means below one of the suction-valve chambers, and by providing the outer noise-reducing chamber with an expanded portion beneath the other suction-valve chamber.
  • the outer cup-shaped piece of metal may have a portion which lies flat on the middle plate and in which is inserted a pressure pipe the end of which extends into the inner sound-reducing chamber.
  • two sheet-metal walls can be fitted on the outside of the two cupshaped pieces of sheetmetal, these walls being spaced away from the pieces of sheetmetal over practically their entire surfaces, a static gascushion being contained between them and the pieces of sheet-metal. This prevents the stream of suction gas and the sprayed oil from coming into contact with the surface of the sound-reduction means and dissipating heat which raises the temperature inside the case. Due to the good space-utilization, there is also room for these attached sheet-metal walls in the space available.
  • the middle plates may have tabs which are bent over alternately to the two sides.
  • the remaining sheet-metal shaped parts can have slots into which the tabs extend; the sheet-metal shaped parts so assembled are then soldered together in a soldering furnace, during which operation they are either held together by a mechanical device extending into the furnace from the outside or are temporarily fastened with the help of the tabs.
  • FIG. 1 is a view of a component according to the invention comprising noise-reducing chambers and the cylinder head,
  • FIG. 2 is a partial longitudinal section through a refrigerating machine of the invention on the line A-A of FIG. l,
  • FIG. 3 is a side elevation of the components of FIG. 1 seen from the outside, and
  • FIG. 4 is a front elevation of this component.
  • a refrigerating machine is hermetically enclosed in a case shown in broken lines.
  • a motor-carrying element 2 on the one hand comprises a cylinder bore 3 accommodating the piston 4 and on the other carries the stator pack 5 plus the stator winding 6 of the motor and the rotor 7 supported in a bearing, not illustrated.
  • the otherwise circular stator plates in the pack 5 are cut away along the edge 8 to form a secant, to save material in known manner.
  • a normal valve plate 9 is fitted at the front end of the cylinder chamber.
  • a component 10 Attached to the valve plate is a component 10 which forms a cylinder head 1 1 and a sound-reducing means 12.
  • the sound-reducing means comprises two chambers 13 and 14 arranged one behind the other, these being interconnected by a throttle passage 15.
  • the cylinder head 1 1 contains a pressure-valve chamber 16 and two suction-valve chambers 17 and 18, inlet openings of which can be seen in FIG. 1 and a side wall thereof in FIG. 2.
  • Gas-cushion compartments 19 and 20 are provided outside the sound-reducing chambers 13 and M respectively.
  • the soundreducing chamber 12 is formed with the help of an outer cupshaped piece 23 of sheet metal
  • the sound-reducing chamber 14 is formed with the help of an inner cup-shaped piece 24 of sheet metal.
  • Sheet metal walls 25 and 26, only the narrow edges of which bear against the pieces 23 and 24 of sheet metal, together with said pieces define gas-cushion compartments l9 and 20, and their lower ends may contain openings 27 through which refrigerant gas can enter the compartments.
  • the middle plate 6, the channel plate 22 and the outer cupshaped piece 23 of sheet metal are upwardly extended to form the cylinder head 11.
  • the middle plate contains openings 28 and 29, which lead into the suction-valve chambers 17 and 18, and an opening 30, which leads into the pressure-valve chamber 16.
  • the channel plate 22 separates the pressurevalve chamber and the suction-valve chambers.
  • a pressurevalve member 31 made of strip, is obliquely arranged in the pressure-valve chamber in such a manner that its fixing means 32 is located beneath the suction-valve chamber 18. As shown in FIG. 3 the space beneath the other suction-valve chamber 17 is used for accommodating an expanded portion 33 of the noise-reducing chamber 13.
  • the suction gas is introduced into the suction-valve chambers 17 and 18 by way of openings in the valve plate 9, and is thence passed into the cylinder through the suction valve.
  • the compressed gas emerging from the swept chamber passes through a pressure line portion 34, formed between the middle plate 21 on the one hand and the channel plate 22 and the piece 23 of sheet metal on the other hand, into the noisereducing chamber 13.
  • the throttle passage 15 leads to an opening, not illustrated, in the middle plate 21 and on into the pressure-reducing chamber 14.
  • a pressure-line pipe 35 and for this purpose the sheet metal shaped parts 23 and 25 have an enlarged flat edge portion 36 through which the end of the pressure pipe 35 extends into the pressure chamber 14.
  • the two noise-reducing chambers 13 and 14 are very shallow in relation to the surfaces of their bases. They make optimal use of the volume available however.
  • tabs 37 and 38 are provided at the edge of the middle plate 21, these being bent over alternately to the two sides.
  • the other sheet metal shaped parts contain slots 39, complementary to these tabs. All the sheet metal shaped parts 26, 24, 22, 21, 23 and 25 can thus be easily assembled in the correct relationship to each other. By fastening the tabs or by means of a mechanical clamping device, the structure so obtained can be held in position and then passed through a furnace for the purpose of soldering.
  • a hennetically enclosed refrigeration compressor unit comprising, a casing, a compressor in said casing having a cylinder and piston, a cylinder head forming a pressure valve chamber connected to said cylinder, two shallow sound reducing chambers connected to said pressure valve chamber, said sound reducing chambers having fluid passage means therebetween and a common wall, one of said sound reducing chambers being positioned below one end of said cylinder and the other of said sound reducing chambers being positioned below said cylinder head.
  • a hermetically enclosed refrigeration compressor unit including a stator pack beneath said cylinder and adjacent said sound reducing chambers, said stator pack having a planar vertical surface adjacent said chambers.
  • a hermetically enclosed refrigeration compressor unit including a plate in abutting engagement with said wall, said wall and said plate forming a throttle passage therebetween to provide fluid communication between said sound reducing chambers.
  • a hermetically enclosed refrigeration compressor unit including a pair of inner and outer dish shaped members on opposite sides of said abutting wall and plate to form inner and outer ones of said sound reducing chambers.
  • a hermetically enclosed refrigeration compressor unit according to claim 4 wherein said plate, said wall and one of said dish shaped members extend in the direction of said cylinder and form said cylinder head.
  • a hermetically enclosed refrigeration compressor unit wherein said head forms two suction valve chambers, a strip shaped valve positioned between said valve chambers, anchoring means for said strip shaped valve positioned between one of said suction valve chambers and one of said noise reducin chambers.
  • a hermetically enclosed refrigeration compressor unit including inner and outer walls in respective spaced relation to said inner and outer dished shaped members to form a pair of static gas chambers on opposite sides of said sound reducing chambers.
  • a hermetically enclosed refrigeration compressor unit in which said wall has a plurality of spaced assembly tabs on the periphery thereof, said tabs being engageable with the edges of said inner and outer walls for assembling said unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
US23083*[A 1968-03-16 1969-06-03 Hermetically enclosed refrigerating machine Expired - Lifetime US3600110A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1601859A DE1601859C3 (de) 1968-03-16 1968-03-16 Hermetisch gekapselter Motorverdichter für eine Kältemaschine

Publications (1)

Publication Number Publication Date
US3600110A true US3600110A (en) 1971-08-17

Family

ID=7056657

Family Applications (1)

Application Number Title Priority Date Filing Date
US23083*[A Expired - Lifetime US3600110A (en) 1968-03-16 1969-06-03 Hermetically enclosed refrigerating machine

Country Status (12)

Country Link
US (1) US3600110A (nl)
AT (1) AT292046B (nl)
BE (1) BE729699A (nl)
CH (1) CH489764A (nl)
DE (1) DE1601859C3 (nl)
DK (1) DK142556C (nl)
ES (1) ES364848A1 (nl)
FR (1) FR2004058A1 (nl)
GB (1) GB1239130A (nl)
NL (1) NL163865C (nl)
NO (1) NO122191B (nl)
SE (1) SE339238B (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782858A (en) * 1984-11-29 1988-11-08 Kabushiki Kaisha Toshiba Valve cover for a compressor
EP3217012A1 (en) * 2016-03-11 2017-09-13 Whirlpool S.A. Discharge acoustic filter, manufacturing process of discharge acoustic filter and hermetic compressor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142188U (nl) * 1985-02-26 1986-09-02
IT1184167B (it) * 1985-03-21 1987-10-22 Eurodomestici Ind Riunite Perfezionamento nei motocompressori sigillati per circuiti frigoriferi
IT1250797B (it) * 1991-07-04 1995-04-21 Aspera Srl Gruppo motocompressore ermetico per circuiti frigoriferi

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823850A (en) * 1954-08-05 1958-02-18 Stempel Hermetik Gmbh Carrier for a motor compressor of a refrigerating machine
US3480206A (en) * 1966-11-23 1969-11-25 Danfoss As Fabricated cylinder head and silencer chamber assembly for a refrigerant compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823850A (en) * 1954-08-05 1958-02-18 Stempel Hermetik Gmbh Carrier for a motor compressor of a refrigerating machine
US3480206A (en) * 1966-11-23 1969-11-25 Danfoss As Fabricated cylinder head and silencer chamber assembly for a refrigerant compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782858A (en) * 1984-11-29 1988-11-08 Kabushiki Kaisha Toshiba Valve cover for a compressor
EP3217012A1 (en) * 2016-03-11 2017-09-13 Whirlpool S.A. Discharge acoustic filter, manufacturing process of discharge acoustic filter and hermetic compressor

Also Published As

Publication number Publication date
DK142556B (da) 1980-11-17
DE1601859B2 (de) 1973-11-29
DE1601859C3 (de) 1978-11-02
FR2004058A1 (nl) 1969-11-21
NL163865C (nl) 1980-10-15
DE1601859A1 (de) 1971-12-23
NL163865B (nl) 1980-05-16
ES364848A1 (es) 1971-01-01
CH489764A (de) 1970-04-30
AT292046B (de) 1971-07-15
DK142556C (da) 1981-07-20
SE339238B (nl) 1971-10-04
BE729699A (nl) 1969-08-18
GB1239130A (nl) 1971-07-14
NO122191B (nl) 1971-06-01
NL6903579A (nl) 1969-09-18

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