EP0507091A1 - Hermetic motor-compressor unit with an improved motor support frame or bracket - Google Patents
Hermetic motor-compressor unit with an improved motor support frame or bracket Download PDFInfo
- Publication number
- EP0507091A1 EP0507091A1 EP92103642A EP92103642A EP0507091A1 EP 0507091 A1 EP0507091 A1 EP 0507091A1 EP 92103642 A EP92103642 A EP 92103642A EP 92103642 A EP92103642 A EP 92103642A EP 0507091 A1 EP0507091 A1 EP 0507091A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- motor
- frame
- wall
- compressor unit
- 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
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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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
Definitions
- This utility model relates to a hermetic motor-compressor unit, in particular for use in a refrigerator or the like, comprising a casing containing a compressor frame for supporting a usual electric motor provided with a stator and rotor, and a cylinder within which a piston moves driven by a drive shaft and crank, a compressor head being positioned on said cylinder.
- a compressor frame can be formed either by casting or from a metal plate by pressing.
- the first case it is formed integrally with the cylinder and is fixed in known manner to the stator of the electric motor.
- it comprises a flat body provided with legs or parts projecting perpendicularly from it to be fixed in known manner (by screws) to the electric motor stator.
- the flat body also comprises a plurality of raised parts in which holes are provided for fixing (by screws or the like) the cylinder within which the piston moves, and a central aperture for receiving a usual drive shaft via a known bearing which embraces it.
- a frame constructed by casting has various drawbacks, for example it is heavy, and needs considerable chip-forming machining and considerable washing before being used in the compressor. Consequently, to construct this frame in the said manner requires a large number of machines for the said machining. This obviously negatively affects the cost of the finished product.
- a frame of plate construction provided with seats for its fixing to the electric motor and cylinder overcomes the drawbacks of the cast frame. It has however the serious drawback of involving a relatively lengthy assembly time because of the various points of fixing between it and the other parts of the compressor.
- An object of the present utility model is therefore to provide a motor-compressor unit of the aforesaid type, in which the compressor frame is constructed by pressing but with a lower construction cost than analogous methods of the state of the art.
- a further object is to provide a motor-compressor unit having a smaller number of parts than analogous known types.
- a further object is to provide a motor-compressor unit in which the compressor frame can be fixed to the remaining compressor parts easily and quickly, resulting in a reduction in overall assembly costs of the motor-compressor unit and a corresponding reduction in the finished cost, aided by the reduction in parts to be stocked.
- a motor-compressor unit of the aforesaid type characterised in that from one end of the compressor frame there rises a wall in which an aperture is provided, said wall being integral with said frame and intended to be fixed to the compressor head, said compressor frame comprising in its flat part a sunken region containing an aperture to allow passage of the drive shaft, said frame being advantageously constructed of pressed plate.
- a motor-compressor unit is indicated by 1 and comprises a casing 2 defined by two half-casings 3 and 4 fixed together in any known manner.
- a cavity 5 defined by said casing 2 contains an electric motor 8 comprising a usual stator 9 and a rotor 10.
- the motor rests in any known manner on spring dampers 11 which themselves rest on a base part 12 of the half-casing 4.
- the motor 8 rotates an output shaft (or drive shaft) 13 on which the big end 15 of a connecting rod 16 secured to a piston 17 is mounted. This latter moves within the bore 18 of a cylinder 20 to compress for example a usual refrigerant fluid of a refrigerator in which the motor-compressor unit is used.
- valve plate 22 At one end of said bore there is a valve plate 22 provided with ports 23 on which usual valves 24 act.
- the motor 8 is associated with a compressor frame 30 constructed of pressed plate and comprising a flat part 31 from which a plurality of arms 32 extend. Said arms are arranged perpendicular to the part 31 and are bent at their free ends 34 where they are provided with through holes 35 for receiving usual frames (screws, not shown) for its fixing to the motor 8.
- Said wall comprises an aperture 38.
- the wall is intended to be fixed by usual screws, not shown, to the compressor head 25.
- a hollow cylindrical portion 40 of a cylindrical body provided with a flange 41 at its free end is inserted into the aperture 38.
- This cylindrical body formed advantageously by pressing and deep-drawing a metal plate (or alternatively of sintered material), defines the cylinder 20 within which the piston 17 moves.
- the flange 41 is positioned between the valve plate 22 and the wall 37, and is secured to this latter by the screws which fix the head 25 to the wall.
- the ports 23 of said plate 22 open into said cylindrical portion 40.
- the frame 30 In its flat part 31, the frame 30 comprises a sunken region 43 facing the motor 8.
- an aperture 44 in which there is placed a hollow cylindrical body 45, formed advantageously by pressing and deep-drawing a metal plate or alternatively of sintered material, possibly covered with an anti-friction material of known type.
- the body 45 surrounds the shaft 8.
- cylindrical body 45 comprises a cylindrical part 46 provided with an end flange 47 disposed in the sunken region 43 in any known manner.
- both the cylindrical body 45 and that defining the cylinder 20 can be formed integrally with the frame or bracket 30 by respectively deep-drawing those portions of the wall 37 and sunken region 43 in positions corresponding with the apertures 38 and 44 (as shown in Figure 4, in which parts corresponding to those of the preceding figures are indicated by the same reference numerals).
- Figure 4 in which parts corresponding to those of the preceding figures are indicated by the same reference numerals.
- a usual bearing for example of anti-friction material, can be placed in the aperture 44 to separate the drive shaft 13 from the frame or bracket 30.
- the construction of the frame 30 starts from a flat stamped plate, shown in Figure 3.
- the aperture 44 (shown dashed in Figure 1) is then formed in this plate, of surface area much larger than the flat part 31, by blanking.
- the aperture edges are then deep-drawn if the cylindrical body 45 is to be formed integrally with the compressor frame 30.
- the compressor frame 30 is then shaped to form those arms 32 close to what is to become the wall 37.
- that portion of the frame 30 bounded by the dashed line 30A in Figure 3 is deep-drawn and the frame thus drawn is blanked along the dashed lines 30B.
- the first operation defines the wall 37, the perimetral raised edges 50, 51 and 52 (see Figure 2), with the edge 51 extending along the entire perimeter of the frame 30, and the arms 32, substantially with the same elevation and providing stiffening for the frame (the edges 50, 52 connect the edge 51 to the wall 37).
- the second operation releases the arms 32 positioned at the wall 37.
- the compressor frame 30 is fixed to the motor (in known manner) and the cylinder and cylindrical body 45 are then inserted into it.
- the valve plate 22 and head 25 are then fixed to the wall 37, so as to also fix to this latter the flange 41 of the cylinder 20, the body 45 then being secured to the flat part 31.
- the frame 30 is easily formed by operations of limited cost, as stated.
- This frame can thus itself incorporate the cylinder within which the piston moves (with considerable advantages in terms of assembly of the compressor components), or alternatively the cylinder be fitted after constructing the frame.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
- This utility model relates to a hermetic motor-compressor unit, in particular for use in a refrigerator or the like, comprising a casing containing a compressor frame for supporting a usual electric motor provided with a stator and rotor, and a cylinder within which a piston moves driven by a drive shaft and crank, a compressor head being positioned on said cylinder.
- A compressor frame can be formed either by casting or from a metal plate by pressing.
- In the first case it is formed integrally with the cylinder and is fixed in known manner to the stator of the electric motor. In the second case it comprises a flat body provided with legs or parts projecting perpendicularly from it to be fixed in known manner (by screws) to the electric motor stator. In this latter case the flat body also comprises a plurality of raised parts in which holes are provided for fixing (by screws or the like) the cylinder within which the piston moves, and a central aperture for receiving a usual drive shaft via a known bearing which embraces it.
- A frame constructed by casting has various drawbacks, for example it is heavy, and needs considerable chip-forming machining and considerable washing before being used in the compressor. Consequently, to construct this frame in the said manner requires a large number of machines for the said machining. This obviously negatively affects the cost of the finished product.
- A frame of plate construction provided with seats for its fixing to the electric motor and cylinder overcomes the drawbacks of the cast frame. It has however the serious drawback of involving a relatively lengthy assembly time because of the various points of fixing between it and the other parts of the compressor.
- In addition, even its construction from a flat plate involves a plurality of machining operations which increase the cost of the final product.
- An object of the present utility model is therefore to provide a motor-compressor unit of the aforesaid type, in which the compressor frame is constructed by pressing but with a lower construction cost than analogous methods of the state of the art. A further object is to provide a motor-compressor unit having a smaller number of parts than analogous known types.
- A further object is to provide a motor-compressor unit in which the compressor frame can be fixed to the remaining compressor parts easily and quickly, resulting in a reduction in overall assembly costs of the motor-compressor unit and a corresponding reduction in the finished cost, aided by the reduction in parts to be stocked.
- These and further objects which will be apparent to the expert of the art are attained by a motor-compressor unit of the aforesaid type, characterised in that from one end of the compressor frame there rises a wall in which an aperture is provided, said wall being integral with said frame and intended to be fixed to the compressor head, said compressor frame comprising in its flat part a sunken region containing an aperture to allow passage of the drive shaft, said frame being advantageously constructed of pressed plate.
- The present utility model will be more apparent from the accompanying drawing, which is provided by way of non-limiting example and in which:
- Figure 1 is a cross-section through a motor-compressor unit according to the utility model;
- Figure 2 is a perspective view of a part of the motor-compressor unit of Figure 1;
- Figure 3 is a plan view of the part shown in Figure 2 before its formation; and
- Figure 4 is a view similar to that of Figure 2, but of a different embodiment of the part shown in that figure.
- With reference to said figures, a motor-compressor unit is indicated by 1 and comprises a
casing 2 defined by two half-casings 3 and 4 fixed together in any known manner. - A
cavity 5 defined by saidcasing 2 contains an electric motor 8 comprising a usual stator 9 and arotor 10. - The motor rests in any known manner on
spring dampers 11 which themselves rest on abase part 12 of the half-casing 4. - The motor 8 rotates an output shaft (or drive shaft) 13 on which the
big end 15 of a connectingrod 16 secured to apiston 17 is mounted. This latter moves within thebore 18 of acylinder 20 to compress for example a usual refrigerant fluid of a refrigerator in which the motor-compressor unit is used. - At one end of said bore there is a valve plate 22 provided with ports 23 on which
usual valves 24 act. - On the valve plate 22 there is provided a
compressor head 25. The motor 8 is associated with acompressor frame 30 constructed of pressed plate and comprising aflat part 31 from which a plurality ofarms 32 extend. Said arms are arranged perpendicular to thepart 31 and are bent at theirfree ends 34 where they are provided with throughholes 35 for receiving usual frames (screws, not shown) for its fixing to the motor 8. - According to the utility model, from a
side edge 36 of theflat part 31 there rises awall 37 substantially perpendicular to thepart 31. - Said wall comprises an
aperture 38. The wall is intended to be fixed by usual screws, not shown, to thecompressor head 25. In the example shown in Figure 1, a hollowcylindrical portion 40 of a cylindrical body provided with aflange 41 at its free end is inserted into theaperture 38. This cylindrical body, formed advantageously by pressing and deep-drawing a metal plate (or alternatively of sintered material), defines thecylinder 20 within which thepiston 17 moves. - The
flange 41 is positioned between the valve plate 22 and thewall 37, and is secured to this latter by the screws which fix thehead 25 to the wall. The ports 23 of said plate 22 open into saidcylindrical portion 40. - In its
flat part 31, theframe 30 comprises asunken region 43 facing the motor 8. - In the
region 43 there is provided anaperture 44 in which there is placed a hollowcylindrical body 45, formed advantageously by pressing and deep-drawing a metal plate or alternatively of sintered material, possibly covered with an anti-friction material of known type. Thebody 45 surrounds the shaft 8. - For this purpose the
cylindrical body 45 comprises a cylindrical part 46 provided with anend flange 47 disposed in thesunken region 43 in any known manner. - Advantageously both the
cylindrical body 45 and that defining thecylinder 20 can be formed integrally with the frame orbracket 30 by respectively deep-drawing those portions of thewall 37 andsunken region 43 in positions corresponding with theapertures 38 and 44 (as shown in Figure 4, in which parts corresponding to those of the preceding figures are indicated by the same reference numerals). In this manner, in constructing theframe 30, further parts are formed which in any other manner would have to be subsequently associated with the frame, so lengthening the compressor construction time. - In the case under examination, when the body 45 (which acts as a guide for the rotation of the
shaft 13 and as a support for it) has been obtained by deep-drawing the metal plate defining theframe 30, a usual bearing, for example of anti-friction material, can be placed in theaperture 44 to separate thedrive shaft 13 from the frame orbracket 30. - The construction of the
frame 30 starts from a flat stamped plate, shown in Figure 3. - The aperture 44 (shown dashed in Figure 1) is then formed in this plate, of surface area much larger than the
flat part 31, by blanking. The aperture edges are then deep-drawn if thecylindrical body 45 is to be formed integrally with thecompressor frame 30. - The
compressor frame 30 is then shaped to form thosearms 32 close to what is to become thewall 37. To achieve this, that portion of theframe 30 bounded by thedashed line 30A in Figure 3 is deep-drawn and the frame thus drawn is blanked along thedashed lines 30B. The first operation defines thewall 37, the perimetralraised edges edge 51 extending along the entire perimeter of theframe 30, and thearms 32, substantially with the same elevation and providing stiffening for the frame (theedges edge 51 to the wall 37). The second operation releases thearms 32 positioned at thewall 37. - All the
arms 32 are then bent down from theflat part 31 and their ends bent. - Having done this, the
compressor frame 30 is fixed to the motor (in known manner) and the cylinder andcylindrical body 45 are then inserted into it. The valve plate 22 andhead 25 are then fixed to thewall 37, so as to also fix to this latter theflange 41 of thecylinder 20, thebody 45 then being secured to theflat part 31. - If the
cylinder 20 and thecylindrical body 45 are formed integrally with thecompressor frame 30 by deep-drawing thewall portion 3 and the sunken region 43 (these being in positions corresponding with theapertures 38 and 44), these fixing operations are no longer necessary. This further simplifies the operations involved in the manufacture and assembly of the compressor. - Thus in both said cases, the
frame 30 is easily formed by operations of limited cost, as stated. This frame can thus itself incorporate the cylinder within which the piston moves (with considerable advantages in terms of assembly of the compressor components), or alternatively the cylinder be fitted after constructing the frame. The same applies to the cylindrical guide and supportbody 45 for the drive shaft 8. - Specific embodiments of the utility model have been described. However further embodiments equivalent to those described are possible which fall within the scope of the present document.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI910251U | 1991-03-26 | ||
IT000251 IT221765Z2 (en) | 1991-03-26 | 1991-03-26 | HERMETIC MOTOR-COMPRESSOR WITH BODY OR SUPPORT BRACKET OF THE PERFECTED ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0507091A1 true EP0507091A1 (en) | 1992-10-07 |
EP0507091B1 EP0507091B1 (en) | 1996-01-17 |
Family
ID=11358371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920103642 Expired - Lifetime EP0507091B1 (en) | 1991-03-26 | 1992-03-03 | Hermetic motor-compressor unit with an improved motor support frame or bracket |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0507091B1 (en) |
BR (1) | BR9201002A (en) |
DE (1) | DE69207625T2 (en) |
IT (1) | IT221765Z2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998049447A1 (en) | 1997-04-28 | 1998-11-05 | Embraco Europe S.R.L. | A hermetic motor-driven compressor for refrigerators |
US6276906B1 (en) * | 1997-05-21 | 2001-08-21 | Matsushita Refrigeration Company | Spherical casing and elastic support for a hermetic motor compressor |
WO2009030536A1 (en) | 2007-08-28 | 2009-03-12 | Acc Austria Gmbh | Coolant compressor |
US7722337B2 (en) | 2004-10-18 | 2010-05-25 | Danfoss Compressors Gmbh | Piston compressor cylinder arrangement, particularly for a hermetically enclosed refrigerant compressor |
WO2013029132A1 (en) * | 2011-08-30 | 2013-03-07 | Whirlpool S.A. | Compressor block |
CN103038583A (en) * | 2010-06-08 | 2013-04-10 | 阿塞里克股份有限公司 | Hermetic compressor |
CN105570090A (en) * | 2016-03-03 | 2016-05-11 | 加西贝拉压缩机有限公司 | Split type crankcase for refrigerator compressor |
CN116398406A (en) * | 2023-03-23 | 2023-07-07 | 广州万宝集团压缩机有限公司 | Compressor assembly, compressor and refrigeration equipment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254045B4 (en) * | 2002-11-20 | 2004-09-23 | Danfoss Compressors Gmbh | Refrigerant compressor arrangement |
CN111577576B (en) * | 2019-02-18 | 2021-12-31 | 安徽美芝制冷设备有限公司 | Frame subassembly and compressor of compressor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2492547A (en) * | 1945-05-03 | 1949-12-27 | Donald E Willard | Air compressor |
GB959243A (en) * | 1961-07-24 | 1964-05-27 | Hintze Rudolf | Reciprocating compressor construction |
DE2030047A1 (en) * | 1969-10-23 | 1971-03-11 | Lee Refigeration Ltd , Lewis, Ronald William, Smith, Eric, Bognor Regis, Sus sex (Großbritannien) | Hermetically sealed electric motor compressor |
EP0325694A2 (en) * | 1988-01-25 | 1989-08-02 | Tecumseh Products Company | Compressor |
-
1991
- 1991-03-26 IT IT000251 patent/IT221765Z2/en active IP Right Grant
-
1992
- 1992-03-03 DE DE1992607625 patent/DE69207625T2/en not_active Expired - Fee Related
- 1992-03-03 EP EP19920103642 patent/EP0507091B1/en not_active Expired - Lifetime
- 1992-03-23 BR BR9201002A patent/BR9201002A/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2492547A (en) * | 1945-05-03 | 1949-12-27 | Donald E Willard | Air compressor |
GB959243A (en) * | 1961-07-24 | 1964-05-27 | Hintze Rudolf | Reciprocating compressor construction |
DE2030047A1 (en) * | 1969-10-23 | 1971-03-11 | Lee Refigeration Ltd , Lewis, Ronald William, Smith, Eric, Bognor Regis, Sus sex (Großbritannien) | Hermetically sealed electric motor compressor |
EP0325694A2 (en) * | 1988-01-25 | 1989-08-02 | Tecumseh Products Company | Compressor |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998049447A1 (en) | 1997-04-28 | 1998-11-05 | Embraco Europe S.R.L. | A hermetic motor-driven compressor for refrigerators |
US6276906B1 (en) * | 1997-05-21 | 2001-08-21 | Matsushita Refrigeration Company | Spherical casing and elastic support for a hermetic motor compressor |
US7722337B2 (en) | 2004-10-18 | 2010-05-25 | Danfoss Compressors Gmbh | Piston compressor cylinder arrangement, particularly for a hermetically enclosed refrigerant compressor |
WO2009030536A1 (en) | 2007-08-28 | 2009-03-12 | Acc Austria Gmbh | Coolant compressor |
CN101828036B (en) * | 2007-08-28 | 2013-07-03 | Acc奥地利有限公司 | Coolant compressor |
CN103038583A (en) * | 2010-06-08 | 2013-04-10 | 阿塞里克股份有限公司 | Hermetic compressor |
CN103038583B (en) * | 2010-06-08 | 2015-05-13 | 阿塞里克股份有限公司 | Hermetic compressor |
WO2013029132A1 (en) * | 2011-08-30 | 2013-03-07 | Whirlpool S.A. | Compressor block |
CN103857911A (en) * | 2011-08-30 | 2014-06-11 | 惠而浦股份有限公司 | Compressor block |
CN105570090A (en) * | 2016-03-03 | 2016-05-11 | 加西贝拉压缩机有限公司 | Split type crankcase for refrigerator compressor |
CN116398406A (en) * | 2023-03-23 | 2023-07-07 | 广州万宝集团压缩机有限公司 | Compressor assembly, compressor and refrigeration equipment |
Also Published As
Publication number | Publication date |
---|---|
BR9201002A (en) | 1992-11-24 |
ITMI910251V0 (en) | 1991-03-26 |
EP0507091B1 (en) | 1996-01-17 |
IT221765Z2 (en) | 1994-10-20 |
ITMI910251U1 (en) | 1992-09-26 |
DE69207625D1 (en) | 1996-02-29 |
DE69207625T2 (en) | 1996-05-30 |
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