US20070237663A1 - Hermetic compressor - Google Patents
Hermetic compressor Download PDFInfo
- Publication number
- US20070237663A1 US20070237663A1 US11/731,219 US73121907A US2007237663A1 US 20070237663 A1 US20070237663 A1 US 20070237663A1 US 73121907 A US73121907 A US 73121907A US 2007237663 A1 US2007237663 A1 US 2007237663A1
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- US
- United States
- Prior art keywords
- intake valve
- compressing
- piston
- hermetic compressor
- chamber
- 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.)
- Abandoned
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Classifications
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- 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
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- 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
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- 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
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- 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
- F04B39/0005—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 adaptations of pistons
Definitions
- the present invention relates to a hermetic compressor, and more particularly to a hermetic compressor capable of preventing an intake valve from making contact with a piston without reducing the compressing efficiency of the compressor.
- a hermetic compressor has been widely used in a refrigerating cycle for a refrigerator or an air conditioner.
- Such a hermetic compressor includes a closed casing forming an external appearance, a compressing unit which is provided in the closed casing to compress refrigerant and a driving unit which provides the compressing unit with driving force.
- the compressing unit includes a cylinder block forming a compressing chamber in which the refrigerant is compressed, a piston performing a linear reciprocation in the compressing chamber so as to compress the refrigerant, a cylinder head coupled to one side of the cylinder block so as to close the compressing chamber and provided with an intake chamber and an exhaust chamber that are separated from each other, and a valve unit which is provided between the cylinder block and the cylinder head so as to control the flow of the refrigerant which is introduced into the compressing chamber from the intake chamber or is exhausted from the compressing chamber into an exhaust chamber.
- the piston performs the linear reciprocation in the compressing chamber so that the refrigerant provided at an outer portion of the closed casing is introduced into the intake chamber of the cylinder head, and then is transferred to the compressing chamber so that the refrigerant is compressed in the compressing chamber.
- the refrigerant compressed in the compressing chamber is exhausted into the exhaust chamber of the cylinder head and then is exhausted out of the closed casing through an exhaust tube. Such a process is repeated, so that the refrigerant is compressed by means of the compressor.
- the valve unit includes a valve plate having an intake hole and an exhaust hole through which the compressing chamber is communicated with the intake chamber and the exhaust chamber, an intake valve which opens/closes the intake hole and an exhaust valve assembly which opens/closes the exhaust hole.
- the intake valve is designed to be easily opened according to the movement of the piston during an intake process of such a hermetic compressor.
- the intake valve is designed to be easily bent according to pressure variation in the compressing chamber.
- the intake valve Since the intake valve is designed to be easily bent according to the pressure variation in the compressing chamber, if the intake vlave is excessively bent relative to the moving distance of the piston when the piston moves from the top dead point to the bottom dead point, the intake valve makes contact with a surface of the piston. If the intake valve makes contact with the piston, the intake valve or the piston may be broken, degrading the reliability of the product. In addition, if debris derived from the breakage remains in the compressing chamber, the cylinder block may be worn.
- the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a hermetic compressor capable of preventing an intake valve from making contact with a piston without reducing the compressing efficiency of the compressor.
- a hermetic compressor comprising a cylinder block having a compressing chamber, a piston performing a reciprocation in the compressing chamber, a cylinder head which is coupled to one side of the cylinder block so as to close the compressing chamber and an intake valve plate having an intake valve which is provided between the cylinder block and the cylinder head so as to control a flow of a refrigerant which is introduced into the compressing chamber, wherein a compressing surface of the piston facing the intake valve plate forms a flat surface parallel to the intake valve plate, and an anti-contact portion which receives a part of the intake valve is formed on the compressing surface so as to prevent the piston from making contact with the intake valve during the reciprocation of the piston.
- the anti-contact portion includes a recess having a shape corresponding to a shape of the intake valve.
- the anti-contact portion has a width larger than a width of the intake valve so that the intake valve passes through the anti-contact portion.
- the intake valve is formed by cutting the intake valve plate, in which one end of the intake valve serves as a fixing end and the other end of the intake valve serves as a free end.
- a depth of the anti-contact portion gradually increases from the fixing end to the free end.
- a volume of the anti-contact portion is set within a predetermined range which does not reduce a compressing efficiency of the hermetic compressor.
- a volume of the anti-contact portion is set within a predetermined range which does not reduce a compressing efficiency of the hermetic compressor.
- FIG. 1 is a schematic sectional view representing a hermetic compressor according to an embodiment of the present invention
- FIG. 2 is an exploded perspective view representing a valve unit and a piston shown in FIG. 1 ;
- FIG. 3 is a sectional view representing a piston when the piston shown in FIG. 2 reaches a top dead point
- FIG. 4 is a sectional view representing an operation of an intake valve when the piston moves back from the top dead point.
- a hermetic compressor according to an embodiment of the present invention is as shown in FIG. 1 includes a closed casing 1 in which a top casing 1 a and a bottom casing 1 b are coupled with each other, a compressing unit 10 which is provided in the closed casing 1 to compress refrigerant and a driving unit 20 which provides the compressing unit 10 with driving force.
- An intake tube 2 which guides the refrigerant from an exterior into the closed casing 1 is provided at one side of the closed casing 1 and an exhaust tube 3 which exhausts the compressed refrigerant in the compressed unit 10 into the outside of the closed casing 1 is provided at the other side of the closed casing 1 .
- the compressing unit 10 includes a cylinder block 11 which has a compressing chamber 11 a for compressing the refrigerant, a piston 12 which compresses the refrigerant while performing a linear reciprocation in the compressing chamber 11 a, a cylinder head 13 which is coupled to one side of the cylinder block 11 to close the compressing chamber 11 a and has an intake chamber 13 a and an exhaust chamber 13 b that are separated from each other, and a valve unit 30 which is provided between the cylinder block 11 and the cylinder head 13 and controls a flow of the refrigerant which is introduced into the compressing chamber 11 a from the intake chamber 13 a, or is exhausted from the compressing chamber 11 a into the exhaust room 13 b.
- the driving unit 20 provides a driving force to allow the piston 12 to reciprocate in the compressing chamber 11 a, and includes a stator 21 fixed in the closed casing 1 and a rotor 22 which is spaced apart from the stator 21 so as to electro-magnetically interact with the stator 21 .
- a rotating shaft 23 is provided on the center portion of the rotor 22 such that the rotating shaft 23 can rotate together with the rotor 22 .
- an eccentric portion 24 which is eccentrically rotated, and a connecting rod 25 . In order to convert the eccentric movement of the eccentric portion 24 connecting rod 25 .
- one end of the connecting rod 25 is rotatably coupled to the eccentric portion 24 and the other end of the connecting rod 25 is coupled to the piston 12 such that the connecting rod 25 can perform the linear and rotating movement.
- the rotating shaft 23 When a power is applied to the hermetic compressor, the rotating shaft 23 is rotated according to an electromagnetic interaction between the stator 21 and the rotor 22 , and the piston 12 which is connected with the eccentric portion 24 by means of the connecting rod 25 performs the linear reciprocation in the compressing chamber 11 a.
- the refrigerant remaining at the outside of the closed casing 1 is introduced into the intake chamber 13 a of the cylinder head 13 through the intake tube 2 and then is transferred to the compressing chamber 11 a so as to be compressed in the compressing chamber 11 a.
- the refrigerant compressed in the compressing chamber 11 a is exhausted into the exhaust chamber 13 b of the cylinder head 13 and is exhausted out of the closed casing 1 through an exhaust tube 4 .
- a valve unit 30 includes a valve plate 40 which has an intake hole 41 and an exhaust hole (not shown) through which the compressing chamber 11 a of the cylinder block 11 communicates with the intake chamber 13 a and the exhaust chamber 13 b of the cylinder 13 . Further, an intake valve plate 35 having an intake valve 31 , which opens/closes the intake hole 41 , is assembled to one side surface of the valve plate 40 facing the cylinder block 11 and an exhaust valve assembly 50 , which opens/closes the exhaust hole, is assembled to the other side surface of the valve plate 40 facing the cylinder head 13 .
- reference numerals 32 and 33 represent gaskets which are interposed between the cylinder head 13 and the valve plate 40 , and between the cylinder block 11 and the intake valve plate 35 , respectively.
- Bolt coupling holes are formed at outer peripheral portions of the gaskets, 32 and 33 , the valve plate 40 , and the cylinder head 13 , respectively.
- Such a valve unit 30 is installed between the cylinder block 11 and the cylinder head 13 by means of a fixing bolt 34 , which is screw-coupled into the bolt coupling hole from the outside the cylinder head 13 so as to be coupled with the cylinder block 11 .
- a peripheral portion of the intake valve 31 is cut from the intake valve plate 35 so that the intake valve 31 is integrally formed with the intake valve plate 35 .
- one end portion of the intake valve 31 serves as a fixing end 31 a fixed to the intake plate 35 and the tip portion of the intake valve 31 serves as a free end 31 b, which is elastically deformed so as to open or close the intake hole 41 .
- the piston 12 which is guided by the cylinder block 11 while moving in forward and backward directions, has a cylindrical shape and a compressing surface 12 a of the piston 12 facing the intake valve plate 35 forms a flat surface which is parallel to the intake valve plate 35 . Further, the compressing surface 12 a has an anti-contact portion 60 so as to prevent the compressing surface 12 a from making contact with the intake valve 31 during the reciprocation of the piston 12 .
- the anti-contact portion 60 is a recess having a shape corresponding to the shape of the intake valve 31 and the volume of the anti-contact portion 60 is set within a range which does not reduce the compressing efficiency of the hermetic compressor.
- the anti-contact portion 60 has a width larger than a width of the intake valve 31 , so that the intake valve 31 can pass through the anti-contact portion 60 when the free end 31 b of the intake valve 31 is bent to be received in the anti-contact portion 60 .
- the depth of the anti-contact portion 60 is gradually increased from the fixing end 31 a to the free end 31 b.
- FIG. 3 is a view representing a piston when the piston moves forward to the maximum extent so as to reach a top dead point. At this time, pressure is applied in a direction in which the piston 12 pushes the intake valve 31 , so that the intake valve 31 does not open the intake hole 41 .
- FIG. 4 is a view representing positions of the piston 12 and the intake valve 31 when the piston 12 moves back from the top dead point to the bottom dead point. If the piston 12 reaches the top dead point and moves back to the bottom dead point, negative pressure is applied to an inside of the compressing chamber 11 a, so that the free end 31 b of the intake valve 31 is bent toward the inside of the compressing chamber 11 a about the fixing end 31 a.
- the anti-contact portion 60 which can receive the free end 31 b of the intake valve 31 , is formed on the compressing surface 12 a of the piston 12 so as to prevent the intake valve 31 from making contact with the piston 12 .
- the hermetic compressor according to the present invention can prevent the components from being damaged by preventing the intake valve from making contact with the piston, and can prevent the cylinder block from being worn by preventing debris derived from the breakage of the components from being introduced into the compressing chamber.
- the recess having a minimum volume is formed in the compressing surface of the piston, so that the distance between the piston and the intake valve plate can be reduced, so that the compressing efficiency of the compressor can be prevented from being degraded.
Abstract
Disclosed is a hermetic compressor capable of preventing an intake valve from making contact with a piston without reducing compressing efficiency of the compressor. The hermetic compressor includes a cylinder block having a compressing chamber, a piston performing a reciprocation, a cylinder block coupled at an side of the cylinder block so as to close the compressing chamber and an intake valve plate which is provided between the cylinder block and the cylinder head and has an intake valve which controls a flow of a refrigerant introduced into the compressing chamber, wherein a compressing surface of the piston facing the intake valve plate forms a flat surface parallel to the intake valve plate and an anti-contact portion which receives a part of the intake valve is formed on the compressing surface so as to prevent the piston from making contact with the intake valve during the reciprocation of the piston.
Description
- This application claims the benefit of Korean Patent Application No. 2006-32423 filed on Apr. 10, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor capable of preventing an intake valve from making contact with a piston without reducing the compressing efficiency of the compressor.
- 2. Description of the Prior Art
- A hermetic compressor has been widely used in a refrigerating cycle for a refrigerator or an air conditioner. Such a hermetic compressor includes a closed casing forming an external appearance, a compressing unit which is provided in the closed casing to compress refrigerant and a driving unit which provides the compressing unit with driving force.
- Among these components, the compressing unit includes a cylinder block forming a compressing chamber in which the refrigerant is compressed, a piston performing a linear reciprocation in the compressing chamber so as to compress the refrigerant, a cylinder head coupled to one side of the cylinder block so as to close the compressing chamber and provided with an intake chamber and an exhaust chamber that are separated from each other, and a valve unit which is provided between the cylinder block and the cylinder head so as to control the flow of the refrigerant which is introduced into the compressing chamber from the intake chamber or is exhausted from the compressing chamber into an exhaust chamber.
- Under this configuration, if the driving unit is operated, the piston performs the linear reciprocation in the compressing chamber so that the refrigerant provided at an outer portion of the closed casing is introduced into the intake chamber of the cylinder head, and then is transferred to the compressing chamber so that the refrigerant is compressed in the compressing chamber. In this manner, the refrigerant compressed in the compressing chamber is exhausted into the exhaust chamber of the cylinder head and then is exhausted out of the closed casing through an exhaust tube. Such a process is repeated, so that the refrigerant is compressed by means of the compressor.
- The valve unit includes a valve plate having an intake hole and an exhaust hole through which the compressing chamber is communicated with the intake chamber and the exhaust chamber, an intake valve which opens/closes the intake hole and an exhaust valve assembly which opens/closes the exhaust hole.
- the intake valve is designed to be easily opened according to the movement of the piston during an intake process of such a hermetic compressor. In order to allow the intake valve to be easily opened, the intake valve is designed to be easily bent according to pressure variation in the compressing chamber.
- Since the intake valve is designed to be easily bent according to the pressure variation in the compressing chamber, if the intake vlave is excessively bent relative to the moving distance of the piston when the piston moves from the top dead point to the bottom dead point, the intake valve makes contact with a surface of the piston. If the intake valve makes contact with the piston, the intake valve or the piston may be broken, degrading the reliability of the product. In addition, if debris derived from the breakage remains in the compressing chamber, the cylinder block may be worn.
- In this manner, in order to prevent the intake valve from making contact with the piston, a gasket having a large thickness is interposed between the piston and the intake valve. However, if the thickness of the gasket is too large, a dead volume is increased between the piston and the intake valve, degrading the compressing efficiency of the compressor.
- The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a hermetic compressor capable of preventing an intake valve from making contact with a piston without reducing the compressing efficiency of the compressor.
- In order to accomplish the above object, according to an aspect of the present invention, there is provided a hermetic compressor comprising a cylinder block having a compressing chamber, a piston performing a reciprocation in the compressing chamber, a cylinder head which is coupled to one side of the cylinder block so as to close the compressing chamber and an intake valve plate having an intake valve which is provided between the cylinder block and the cylinder head so as to control a flow of a refrigerant which is introduced into the compressing chamber, wherein a compressing surface of the piston facing the intake valve plate forms a flat surface parallel to the intake valve plate, and an anti-contact portion which receives a part of the intake valve is formed on the compressing surface so as to prevent the piston from making contact with the intake valve during the reciprocation of the piston.
- The anti-contact portion includes a recess having a shape corresponding to a shape of the intake valve.
- The anti-contact portion has a width larger than a width of the intake valve so that the intake valve passes through the anti-contact portion.
- The intake valve is formed by cutting the intake valve plate, in which one end of the intake valve serves as a fixing end and the other end of the intake valve serves as a free end.
- A depth of the anti-contact portion gradually increases from the fixing end to the free end.
- A volume of the anti-contact portion is set within a predetermined range which does not reduce a compressing efficiency of the hermetic compressor.
- A volume of the anti-contact portion is set within a predetermined range which does not reduce a compressing efficiency of the hermetic compressor.
-
FIG. 1 is a schematic sectional view representing a hermetic compressor according to an embodiment of the present invention; -
FIG. 2 is an exploded perspective view representing a valve unit and a piston shown inFIG. 1 ; -
FIG. 3 is a sectional view representing a piston when the piston shown inFIG. 2 reaches a top dead point; and -
FIG. 4 is a sectional view representing an operation of an intake valve when the piston moves back from the top dead point. - Hereinafter, a hermetic compressor according to a preferred embodiment of the present invention will be explained in detail with reference to the accompanying drawings.
- A hermetic compressor according to an embodiment of the present invention is as shown in
FIG. 1 includes a closed casing 1 in which atop casing 1 a and abottom casing 1 b are coupled with each other, acompressing unit 10 which is provided in the closed casing 1 to compress refrigerant and adriving unit 20 which provides thecompressing unit 10 with driving force. Anintake tube 2 which guides the refrigerant from an exterior into the closed casing 1 is provided at one side of the closed casing 1 and an exhaust tube 3 which exhausts the compressed refrigerant in thecompressed unit 10 into the outside of the closed casing 1 is provided at the other side of the closed casing 1. - Among these components, the
compressing unit 10 includes acylinder block 11 which has acompressing chamber 11 a for compressing the refrigerant, apiston 12 which compresses the refrigerant while performing a linear reciprocation in thecompressing chamber 11 a, acylinder head 13 which is coupled to one side of thecylinder block 11 to close thecompressing chamber 11 a and has anintake chamber 13 aand anexhaust chamber 13 b that are separated from each other, and avalve unit 30 which is provided between thecylinder block 11 and thecylinder head 13 and controls a flow of the refrigerant which is introduced into thecompressing chamber 11 a from theintake chamber 13 a, or is exhausted from thecompressing chamber 11 a into theexhaust room 13 b. - the
driving unit 20 provides a driving force to allow thepiston 12 to reciprocate in thecompressing chamber 11 a, and includes astator 21 fixed in the closed casing 1 and arotor 22 which is spaced apart from thestator 21 so as to electro-magnetically interact with thestator 21. A rotatingshaft 23 is provided on the center portion of therotor 22 such that the rotatingshaft 23 can rotate together with therotor 22. Provided below the rotatingshaft 23 are aneccentric portion 24, which is eccentrically rotated, and a connectingrod 25. In order to convert the eccentric movement of theeccentric portion 24 connectingrod 25. In order to convert the eccentric movement of theeccentric portion 24 into the linear movement, one end of the connectingrod 25 is rotatably coupled to theeccentric portion 24 and the other end of the connectingrod 25 is coupled to thepiston 12 such that the connectingrod 25 can perform the linear and rotating movement. - When a power is applied to the hermetic compressor, the
rotating shaft 23 is rotated according to an electromagnetic interaction between thestator 21 and therotor 22, and thepiston 12 which is connected with theeccentric portion 24 by means of theconnecting rod 25 performs the linear reciprocation in thecompressing chamber 11 a. Through this process, the refrigerant remaining at the outside of the closed casing 1 is introduced into theintake chamber 13 aof thecylinder head 13 through theintake tube 2 and then is transferred to thecompressing chamber 11 a so as to be compressed in thecompressing chamber 11 a. In this manner, the refrigerant compressed in thecompressing chamber 11 a is exhausted into theexhaust chamber 13 b of thecylinder head 13 and is exhausted out of the closed casing 1 through an exhaust tube 4. - Meanwhile, a
valve unit 30 includes avalve plate 40 which has anintake hole 41 and an exhaust hole (not shown) through which thecompressing chamber 11 a of thecylinder block 11 communicates with theintake chamber 13 a and theexhaust chamber 13 b of thecylinder 13. Further, anintake valve plate 35 having anintake valve 31, which opens/closes theintake hole 41, is assembled to one side surface of thevalve plate 40 facing thecylinder block 11 and anexhaust valve assembly 50, which opens/closes the exhaust hole, is assembled to the other side surface of thevalve plate 40 facing thecylinder head 13. - For reference,
reference numerals cylinder head 13 and thevalve plate 40, and between thecylinder block 11 and theintake valve plate 35, respectively. Bolt coupling holes are formed at outer peripheral portions of the gaskets, 32 and 33, thevalve plate 40, and thecylinder head 13, respectively. Such avalve unit 30 is installed between thecylinder block 11 and thecylinder head 13 by means of afixing bolt 34, which is screw-coupled into the bolt coupling hole from the outside thecylinder head 13 so as to be coupled with thecylinder block 11. - A peripheral portion of the
intake valve 31, except for an end portion thereof, is cut from theintake valve plate 35 so that theintake valve 31 is integrally formed with theintake valve plate 35. At this time, one end portion of theintake valve 31 serves as afixing end 31 a fixed to theintake plate 35 and the tip portion of theintake valve 31 serves as afree end 31 b, which is elastically deformed so as to open or close theintake hole 41. - Meanwhile, the
piston 12, which is guided by thecylinder block 11 while moving in forward and backward directions, has a cylindrical shape and acompressing surface 12 a of thepiston 12 facing theintake valve plate 35 forms a flat surface which is parallel to theintake valve plate 35. Further, thecompressing surface 12 a has ananti-contact portion 60 so as to prevent thecompressing surface 12 a from making contact with theintake valve 31 during the reciprocation of thepiston 12. - The
anti-contact portion 60 is a recess having a shape corresponding to the shape of theintake valve 31 and the volume of theanti-contact portion 60 is set within a range which does not reduce the compressing efficiency of the hermetic compressor. In addition, theanti-contact portion 60 has a width larger than a width of theintake valve 31, so that theintake valve 31 can pass through theanti-contact portion 60 when thefree end 31 b of theintake valve 31 is bent to be received in theanti-contact portion 60. - In addition, since the
free end 31 b of theintake valve 31 is rotated about thefixing end 31 a, the depth of theanti-contact portion 60 is gradually increased from thefixing end 31 a to thefree end 31 b. - Hereinafter, the operation and functions of the hermetic compressor according to the exemplary embodiment of the present invention will be explained with reference to
FIGS. 3 and 4 . -
FIG. 3 is a view representing a piston when the piston moves forward to the maximum extent so as to reach a top dead point. At this time, pressure is applied in a direction in which thepiston 12 pushes theintake valve 31, so that theintake valve 31 does not open theintake hole 41. -
FIG. 4 is a view representing positions of thepiston 12 and theintake valve 31 when thepiston 12 moves back from the top dead point to the bottom dead point. If thepiston 12 reaches the top dead point and moves back to the bottom dead point, negative pressure is applied to an inside of the compressingchamber 11 a, so that thefree end 31 b of theintake valve 31 is bent toward the inside of the compressingchamber 11 a about the fixingend 31 a. - In this case, the
anti-contact portion 60, which can receive thefree end 31 b of theintake valve 31, is formed on the compressingsurface 12 a of thepiston 12 so as to prevent theintake valve 31 from making contact with thepiston 12. - As described above, the hermetic compressor according to the present invention can prevent the components from being damaged by preventing the intake valve from making contact with the piston, and can prevent the cylinder block from being worn by preventing debris derived from the breakage of the components from being introduced into the compressing chamber.
- In addition, since the recess having a minimum volume is formed in the compressing surface of the piston, the distance between the piston and the intake valve plate can be reduced, so that the compressing efficiency of the compressor can be prevented from being degraded.
Claims (6)
1. A hermetic compressor comprising:
a cylinder block having a compressing chamber;
a piston performing a reciprocation in the compressing chamber;
a cylinder head which is coupled to one side of the cylinder block so as to close the compressing chamber; and
an intake valve plate having an intake valve which is provided between the cylinder block and the cylinder head so as to control a flow of a refrigerant which is introduced into the compressing chamber,
wherein a compressing surface of the piston facing the intake valve plate forms a flat surface parallel to the intake valve plate, and an anti-contact portion which receives a part of the intake valve is formed on the compressing surface so as to prevent the piston from making contact with the intake valve during the reciprocation of the piston.
2. The hermetic compressor as claimed in claim 1 , wherein the anti-contact portion includes a recess having a shape corresponding to a shape of the intake valve.
3. The hermetic compressor as claimed in claim 2 , wherein the anti-contact portion has a width larger than a width of the intake valve so that the intake valve passes through the anti-contact portion.
4. The hermetic compressor as claimed in claim 2 , wherein the intake valve is formed by cutting the intake valve plate, in which one end of the intake valve serves as a fixing end and the other end of the intake valve serves as a free end.
5. The hermetic compressor as claimed in claim 4 , wherein a depth of the anti-contact portion gradually increases from the fixing end to the free end.
6. The hermetic compressor as claimed in claim 2 , wherein a volume of the anti-contact portion is set within a predetermined range which does not reduce a compressing efficiency of the hermetic compressor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2006-32423 | 2006-04-10 | ||
KR1020060032423A KR20070101440A (en) | 2006-04-10 | 2006-04-10 | Hermetic compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070237663A1 true US20070237663A1 (en) | 2007-10-11 |
Family
ID=38575496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/731,219 Abandoned US20070237663A1 (en) | 2006-04-10 | 2007-03-30 | Hermetic compressor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070237663A1 (en) |
KR (1) | KR20070101440A (en) |
CN (1) | CN101054963A (en) |
BR (1) | BRPI0701995A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2469078A (en) * | 2009-03-31 | 2010-10-06 | Scion Sprays Ltd | Valve arrangement for a positive displacement fluid injector, eg fuel injector |
GB2484855A (en) * | 2009-03-31 | 2012-04-25 | Scion Sprays Ltd | Valve arrangement for a positive displacement fluid injector, eg fuel injector |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101936277A (en) * | 2010-08-03 | 2011-01-05 | 快意(江门)压缩机有限公司 | Compact type environment-protection oil-free air compressor |
JP6170752B2 (en) * | 2013-06-13 | 2017-07-26 | アルバック機工株式会社 | pump |
BR102014002144A2 (en) * | 2014-01-28 | 2015-10-27 | Whirlpool Sa | reciprocating compressor stop and valve arrangement |
CN112369347A (en) * | 2020-10-25 | 2021-02-19 | 吉根祥 | Walking chicken is bred with portable device of food of throwing |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5173040A (en) * | 1990-02-20 | 1992-12-22 | Tokico Ltd. | Air compressor |
US6893233B2 (en) * | 2001-11-21 | 2005-05-17 | Samsung Gwangju Electronics Co., Ltd. | Noise reducing cylinder assembly for compressor |
-
2006
- 2006-04-10 KR KR1020060032423A patent/KR20070101440A/en not_active Application Discontinuation
-
2007
- 2007-03-30 US US11/731,219 patent/US20070237663A1/en not_active Abandoned
- 2007-04-09 CN CNA2007100963038A patent/CN101054963A/en active Pending
- 2007-04-10 BR BRPI0701995-5A patent/BRPI0701995A2/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5173040A (en) * | 1990-02-20 | 1992-12-22 | Tokico Ltd. | Air compressor |
US6893233B2 (en) * | 2001-11-21 | 2005-05-17 | Samsung Gwangju Electronics Co., Ltd. | Noise reducing cylinder assembly for compressor |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2469078A (en) * | 2009-03-31 | 2010-10-06 | Scion Sprays Ltd | Valve arrangement for a positive displacement fluid injector, eg fuel injector |
GB2469078B (en) * | 2009-03-31 | 2012-04-11 | Scion Sprays Ltd | A fluid injector having a novel inlet valve arrangement |
GB2484855A (en) * | 2009-03-31 | 2012-04-25 | Scion Sprays Ltd | Valve arrangement for a positive displacement fluid injector, eg fuel injector |
GB2484855B (en) * | 2009-03-31 | 2012-10-24 | Scion Sprays Ltd | A fluid injector having a novel inlet valve arrangement |
US8757131B2 (en) | 2009-03-31 | 2014-06-24 | Robert Bosch Gmbh | Fluid injector having a novel inlet valve arrangement |
Also Published As
Publication number | Publication date |
---|---|
BRPI0701995A2 (en) | 2010-08-31 |
CN101054963A (en) | 2007-10-17 |
KR20070101440A (en) | 2007-10-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG GWANGJU-JU ELECTRONICS CO., LTD, KOREA, RE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, BO HYUN;REEL/FRAME:019175/0563 Effective date: 20070322 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |