WO2019192886A1 - An improved cylinder head used in a hermetically sealed compressor of a cooler appliance - Google Patents

An improved cylinder head used in a hermetically sealed compressor of a cooler appliance Download PDF

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Publication number
WO2019192886A1
WO2019192886A1 PCT/EP2019/057562 EP2019057562W WO2019192886A1 WO 2019192886 A1 WO2019192886 A1 WO 2019192886A1 EP 2019057562 W EP2019057562 W EP 2019057562W WO 2019192886 A1 WO2019192886 A1 WO 2019192886A1
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WO
WIPO (PCT)
Prior art keywords
cylinder head
shell
hermetically sealed
sealed compressor
space
Prior art date
Application number
PCT/EP2019/057562
Other languages
French (fr)
Inventor
Sarper Marasli
Cihan Gunduz
Yasin BATUR
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2019192886A1 publication Critical patent/WO2019192886A1/en

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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
    • 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
    • F04B39/125—Cylinder heads

Definitions

  • the present invention relates to a hermetically sealed compressor provided in a cooler appliance, particularly in a domestic type refrigerator.
  • the present invention relates to a cylinder head component of a hermetically sealed compressor.
  • Hermetically sealed compressors used in domestic type refrigerators are known in the art.
  • Hermetically sealed compressors are provided with a body to which components are fastened, a stator fastened to the body, a rotor rotating by means of the magnetic field generated by the stator, and a crank-connection rod-crank pin-piston mechanism converting the rotational motion obtained from the rotor into a reciprocating motion.
  • the crank is rotated by means of the actuation generated by the motor group.
  • the rotational motion is converted into reciprocating motion by means of the connection rod connected to the crank.
  • a piston is thus actuated in a cylinder chamber provided on the body, thereby pressurizing a coolant fluid received inside through a suction plenum of the valve plate fastened on the body.
  • the pressurized coolant fluid passes through an exhaust port disposed on the valve plate upon opening of a leaf provided also on the valve plate, and fills into the volume in the cylinder head.
  • the cylinder head is a compartment in which the pressurized gas passing through the exhaust port is stored in an enclosed volume and then discharged by means of a connection orifice provided on the body.
  • the cylinder head inhibits the coolant fluid pressurized in the cylinder chamber from mixing with the coolant fluid in the compressor which is not yet pressurized. Movement of the pressurized coolant fluid transmitted into the cylinder head causes noise and pulsation. Increasing the surface area contacted by the coolant fluid in the cylinder head positively affects said noise and pulsation.
  • the cylinder head is made with a volume as large as possible and is divided into chambers in order to increase the contact surface.
  • the increased volume of the cylinder head causes the occupied area to expand due to enlarged parts, and the costs to rise.
  • the aim of the present invention is to realize a hermetically sealed compressor used in a cooler appliance, enabling obviating the mentioned disadvantages of the prior art in a cost-effective manner and allowing a low-noise operation.
  • the space in the cylinder head of the invention is surrounded by a serrated surface having a plurality of elevated portions enabling the fluid flowing through the space to be acoustically damped.
  • the invention enables further improving the noise reduction provided by the space, in a manner similar to anechoic chambers.
  • the elevated portions increase the overall surface area of the space.
  • the sound waves advancing in the coolant are subjected to a higher number of successive impacts on the serrated surface of the space, and are effectively damped.
  • the noise generated by the coolant flow can be reduced to acceptable levels targeted in accordance with the standards, without compromising the total size of the compressor.
  • the cooler appliance can thus be prevented from generating sounds likely to disturb the users, thereby improving customer satisfaction.
  • the serrated surface is formed directly on the inner surface of the shell of the cylinder head.
  • the noise reduction capacity of the space in the shell is thus further improved.
  • the serrated surface is formed on the inner surface of a separate layer instead of the shell.
  • the cylinder head is improved by the layer in order to enhance the noise reduction performance of the shell's space.
  • the layer further enables acoustically isolating the serrated surface from the shell.
  • the shell and the layer are made of the same material, or alternatively, they are made of different materials with different thermal and/or acoustic characteristics.
  • the layer is made of heat insulating materials.
  • the elevated portions are arranged as one or more two dimensional arrays.
  • each elevated portion is shaped as a pyramid.
  • the elevated portions are shaped as wedges, lumps or the like.
  • Figure 1 is a schematic view of a hermetically sealed compressor having a cylinder head in an embodiment of the invention.
  • Figure 2 is a schematic partial perspective view of the cylinder head in an embodiment of the invention.
  • Figure 3 is an enlarged schematic view of the detail A of Figure 2.
  • Figure 4 is another schematic partial perspective view of the cylinder head in an embodiment of the invention.
  • the cylinder head (1) is adapted to be used in a hermetically sealed compressor (2) of a cooler appliance, particularly of a domestic type refrigerator.
  • the cylinder head (1) comprises a shell (3), at least one space (4) provided in the shell (3), an exhaust chamber (23) into which the compressed gas passing through an exhaust port (24) fills, and an enclosed volume from which the gas is then discharged by means of a connection orifice provided on a body (17). ( Figure 1 to Figure 4).
  • the space (4) is surrounded by a serrated surface (5).
  • the serrated surface (5) has a plurality of elevated portions (6) enabling the coolant flowing through the space (4) to be acoustically damped.
  • the hermetically sealed compressor (2) of the invention comprises said cylinder head (1).
  • the serrated surface (5) is formed by the inner surface of the shell (3). In this embodiment, the serrated surface (5) is formed directly on the inner surface of the shell (3).
  • the cylinder head (1) comprises a layer (7) mounted in the shell (3).
  • the serrated surface (5) is formed by the inner surface of the layer (7) instead of the shell (3).
  • the serrated surface (5) is formed directly on the inner surface of the layer (7) during production process.
  • the layer (7) is mounted on the shell (3) ( Figure 1 to Figure 4).
  • the cylinder head (1) is conveniently improved by the serrated surface (5) in order to enhance the noise reduction performance.
  • the serrated surface (5) can be acoustically isolated from the shell (3) due to the layer (7) being produced separately from the shell (3).
  • the layer (7) is made of a heat insulating material.
  • the heat insulating material comprises heat resistant resin.
  • a plurality of elevated portions (6) are arranged as one or more two-dimensional arrays surrounding the space (4).
  • each elevated portion (6) is shaped as a pyramid or a truncated pyramid. In an alternative version of the previous embodiments, each elevated portion (6) is shaped as a wedge, lump or the like.
  • the compressor (2) is hermetically sealed by an upper housing (8) and a lower housing (9).
  • the lower housing (9) acts as an oil chamber (10).
  • An oil collection tube (11) is partially submerged in the oil chamber (10).
  • the motor (12) has a stator (13) and a rotor (14).
  • a crankshaft (15) is supported in a main bearing (16) provided in a cylinder block (27), and is fixed to the rotor (14).
  • a piston (18) enables the coolant therein to be compressed by reciprocating inside a cylinder chamber (19).
  • the piston (18) is connected to the crankshaft (15) by means of a connecting rod (20) and a pin (21).
  • the cylinder chamber (19) is covered by the cylinder head (1).
  • the cooler appliance is a domestic type refrigerator.
  • the noise levels of the hermetically sealed compressor (2) can be reduced to the aimed levels in a cost-effective manner by means of the cylinder head (1) of the invention.
  • the present invention enables realizing a cooler appliance with lower noise levels, thereby improving customer satisfaction.

Abstract

The present invention relates to a cylinder head (1) adapted to be used in a hermetically sealed compressor (2) of a cooler appliance. The cylinder head (1) comprises a shell (3), at least one space (4) provided in the shell (3), an exhaust chamber (23) into which the compressed gas passing through an exhaust port (24) fills, and an enclosed volume from which the gas is then discharged by means of a connection orifice provided on a body (17). In the cylinder head (1) of the invention, the space (4) is surrounded by a serrated surface (5) having a plurality of elevated portions (6) enabling the coolant flowing through the space (4) to be acoustically damped.

Description

AN IMPROVED CYLINDER HEAD USED IN A HERMETICALLY SEALED COMPRESSOR OF A COOLER APPLIANCE
The present invention relates to a hermetically sealed compressor provided in a cooler appliance, particularly in a domestic type refrigerator. In particular, the present invention relates to a cylinder head component of a hermetically sealed compressor.
Hermetically sealed compressors used in domestic type refrigerators are known in the art. Hermetically sealed compressors are provided with a body to which components are fastened, a stator fastened to the body, a rotor rotating by means of the magnetic field generated by the stator, and a crank-connection rod-crank pin-piston mechanism converting the rotational motion obtained from the rotor into a reciprocating motion. The crank is rotated by means of the actuation generated by the motor group. The rotational motion is converted into reciprocating motion by means of the connection rod connected to the crank. A piston is thus actuated in a cylinder chamber provided on the body, thereby pressurizing a coolant fluid received inside through a suction plenum of the valve plate fastened on the body. The pressurized coolant fluid passes through an exhaust port disposed on the valve plate upon opening of a leaf provided also on the valve plate, and fills into the volume in the cylinder head. The cylinder head is a compartment in which the pressurized gas passing through the exhaust port is stored in an enclosed volume and then discharged by means of a connection orifice provided on the body. The cylinder head inhibits the coolant fluid pressurized in the cylinder chamber from mixing with the coolant fluid in the compressor which is not yet pressurized. Movement of the pressurized coolant fluid transmitted into the cylinder head causes noise and pulsation. Increasing the surface area contacted by the coolant fluid in the cylinder head positively affects said noise and pulsation.
In the known method, the cylinder head is made with a volume as large as possible and is divided into chambers in order to increase the contact surface. The increased volume of the cylinder head causes the occupied area to expand due to enlarged parts, and the costs to rise.
The aim of the present invention is to realize a hermetically sealed compressor used in a cooler appliance, enabling obviating the mentioned disadvantages of the prior art in a cost-effective manner and allowing a low-noise operation.
This aim is achieved by the cylinder head defined in claim 1, the hermetically sealed compressor defined in claim 8 and the cooler appliance defined in claim 9. Further improvements are achieved by means of the subject matter of invention respectively disclosed in the dependent claims.
The space in the cylinder head of the invention is surrounded by a serrated surface having a plurality of elevated portions enabling the fluid flowing through the space to be acoustically damped.
By means of the serrated surface, the invention enables further improving the noise reduction provided by the space, in a manner similar to anechoic chambers. The elevated portions increase the overall surface area of the space. Thus, the sound waves advancing in the coolant are subjected to a higher number of successive impacts on the serrated surface of the space, and are effectively damped. By means of the cylinder head of the invention, the noise generated by the coolant flow can be reduced to acceptable levels targeted in accordance with the standards, without compromising the total size of the compressor. The cooler appliance can thus be prevented from generating sounds likely to disturb the users, thereby improving customer satisfaction.
In an embodiment of the invention, the serrated surface is formed directly on the inner surface of the shell of the cylinder head. The noise reduction capacity of the space in the shell is thus further improved.
In an alternative embodiment of the invention, the serrated surface is formed on the inner surface of a separate layer instead of the shell. In this alternative embodiment, the cylinder head is improved by the layer in order to enhance the noise reduction performance of the shell's space. The layer further enables acoustically isolating the serrated surface from the shell. In this embodiment, the shell and the layer are made of the same material, or alternatively, they are made of different materials with different thermal and/or acoustic characteristics.
In another embodiment of the invention, the layer is made of heat insulating materials.
In another embodiment of the invention, the elevated portions are arranged as one or more two dimensional arrays.
In another embodiment of the invention, each elevated portion is shaped as a pyramid. Alternatively, the elevated portions are shaped as wedges, lumps or the like.
Other advantages of the cylinder head and the hermetically sealed compressor of the invention will be disclosed by referral of the embodiment to the accompanying figures, wherein:
Figure 1 is a schematic view of a hermetically sealed compressor having a cylinder head in an embodiment of the invention.
Figure 2 is a schematic partial perspective view of the cylinder head in an embodiment of the invention.
Figure 3 is an enlarged schematic view of the detail A of Figure 2.
Figure 4 is another schematic partial perspective view of the cylinder head in an embodiment of the invention.
The elements in the figures are numbered individually and the correspondence of these numbers are given hereinafter.
  1. Cylinder head
  2. Compressor
  3. Shell
  4. Space
  5. Serrated surface
  6. Elevated portion
  7. Layer
  8. Upper housing
  9. Lower housing
  10. Chamber
  11. Tube
  12. Motor
  13. Stator
  14. Rotor
  15. Crankshaft
  16. Bearing
  17. Body
  18. Piston
  19. Cylinder chamber
  20. Connecting rod
  21. Pin
  22. Suction muffler
  23. Exhaust chamber
  24. Exhaust port
  25. Valve plate
  26. Suction plenum
  27. Cylinder block
The cylinder head (1) is adapted to be used in a hermetically sealed compressor (2) of a cooler appliance, particularly of a domestic type refrigerator.
The cylinder head (1) comprises a shell (3), at least one space (4) provided in the shell (3), an exhaust chamber (23) into which the compressed gas passing through an exhaust port (24) fills, and an enclosed volume from which the gas is then discharged by means of a connection orifice provided on a body (17). (Figure 1 to Figure 4).
In the cylinder head (1) of the invention, the space (4) is surrounded by a serrated surface (5). The serrated surface (5) has a plurality of elevated portions (6) enabling the coolant flowing through the space (4) to be acoustically damped.
The hermetically sealed compressor (2) of the invention comprises said cylinder head (1).
In an embodiment of the invention, the serrated surface (5) is formed by the inner surface of the shell (3). In this embodiment, the serrated surface (5) is formed directly on the inner surface of the shell (3).
In an alternative embodiment of the invention, the cylinder head (1) comprises a layer (7) mounted in the shell (3). In this embodiment, the serrated surface (5) is formed by the inner surface of the layer (7) instead of the shell (3). In this embodiment, the serrated surface (5) is formed directly on the inner surface of the layer (7) during production process. Then, the layer (7) is mounted on the shell (3) (Figure 1 to Figure 4). By this, the cylinder head (1) is conveniently improved by the serrated surface (5) in order to enhance the noise reduction performance. In addition, the serrated surface (5) can be acoustically isolated from the shell (3) due to the layer (7) being produced separately from the shell (3).
In another embodiment of the invention, the layer (7) is made of a heat insulating material.
In another embodiment of the invention, the heat insulating material comprises heat resistant resin.
In another embodiment of the invention, a plurality of elevated portions (6) are arranged as one or more two-dimensional arrays surrounding the space (4).
In another embodiment of the invention, each elevated portion (6) is shaped as a pyramid or a truncated pyramid. In an alternative version of the previous embodiments, each elevated portion (6) is shaped as a wedge, lump or the like.
The compressor (2) is hermetically sealed by an upper housing (8) and a lower housing (9). The lower housing (9) acts as an oil chamber (10). An oil collection tube (11) is partially submerged in the oil chamber (10). The motor (12) has a stator (13) and a rotor (14). A crankshaft (15) is supported in a main bearing (16) provided in a cylinder block (27), and is fixed to the rotor (14). A piston (18) enables the coolant therein to be compressed by reciprocating inside a cylinder chamber (19). The piston (18) is connected to the crankshaft (15) by means of a connecting rod (20) and a pin (21). The cylinder chamber (19) is covered by the cylinder head (1). When the piston (18) moves forwards, the compressed coolant enters into the space (4) in the cylinder head (1) through the exhaust port (24) of the valve (25) interposed between the cylinder head (1) and the cylinder block (27). When the piston (18) moves backwards, the coolant is sucked through the suction muffler (22) and enters into the cylinder chamber (19) through the suction plenum (26) of the valve plate. The noise is generally generated in the vicinity of the suction plenum (26) of the valve plate and the exhaust port (24) of the valve plate (25) as a result of the reciprocating motion of the piston (18).
In another embodiment of the invention, the cooler appliance is a domestic type refrigerator.
The noise levels of the hermetically sealed compressor (2) can be reduced to the aimed levels in a cost-effective manner by means of the cylinder head (1) of the invention. The present invention enables realizing a cooler appliance with lower noise levels, thereby improving customer satisfaction.

Claims (9)

  1. A cylinder head (1) adapted to be used in a hermetically sealed compressor (2) of a cooler appliance, comprising a shell (3), at least one space (4) provided in the shell (3), an exhaust chamber (23) into which the compressed gas passing through an exhaust port (24) fills, and an enclosed volume from which the gas is then discharged by means of a connection orifice provided on a body (17).
    characterized by the space (4) surrounded by a serrated surface (5) having a plurality of elevated portions (6), so as to enable the coolant flowing therethrough to be acoustically damped.
  2. A cylinder head (1) according to claim 1, characterized by the serrated surface (5) formed by the inner surface of the shell (3).
  3. A cylinder head (1) according to claim 1, characterized by a layer (7) mounted in the shell (3), whose inner surface forms the serrated surface (5).
  4. A cylinder head (1) according to claim 3, characterized by the inner layer (7) made of heat insulating material.
  5. A cylinder head (1) according to claim 3 or 4, characterized by heat insulating material comprising heat resistant resin.
  6. A cylinder head (1) according to any one of the claims 1 to 5, characterized by a plurality of elevated portions (6) arranged as a two dimensional array.
  7. A cylinder head (1) according to any one of the claims 1 to 6, characterized by the elevated portions (6) shaped as a pyramid.
  8. A hermetically sealed compressor (2) characterized by a cylinder head (1) according to any one of the claims 1 to 7.
  9. A cooler appliance, particularly a domestic type refrigerator, characterized by the hermetically sealed compressor (2) according to claim 8.
PCT/EP2019/057562 2018-04-03 2019-03-26 An improved cylinder head used in a hermetically sealed compressor of a cooler appliance WO2019192886A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201804637 2018-04-03
TRA2018/04637 2018-04-03

Publications (1)

Publication Number Publication Date
WO2019192886A1 true WO2019192886A1 (en) 2019-10-10

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PCT/EP2019/057562 WO2019192886A1 (en) 2018-04-03 2019-03-26 An improved cylinder head used in a hermetically sealed compressor of a cooler appliance

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002775A1 (en) * 2008-04-22 2011-01-06 Panasonic Ecology Systems Guangdong Co., Ltd. Centrifugal fan and noise reduction method in centrifugal fan
WO2016066213A1 (en) * 2014-10-31 2016-05-06 Arcelik Anonim Sirketi Improved suction muffler for use in a hermetically sealed compressor of a refrigeration appliance
WO2017194492A1 (en) * 2016-05-09 2017-11-16 Arcelik Anonim Sirketi A hermetic compressor with reduced noise level

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002775A1 (en) * 2008-04-22 2011-01-06 Panasonic Ecology Systems Guangdong Co., Ltd. Centrifugal fan and noise reduction method in centrifugal fan
WO2016066213A1 (en) * 2014-10-31 2016-05-06 Arcelik Anonim Sirketi Improved suction muffler for use in a hermetically sealed compressor of a refrigeration appliance
WO2017194492A1 (en) * 2016-05-09 2017-11-16 Arcelik Anonim Sirketi A hermetic compressor with reduced noise level

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