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  Hermetic type compressorThe Patent Description & Claims data below is from USPTO Patent Application 20080003115. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATION [0001]This application claims the benefit of Korean Patent Application No. 2006-58974, filed on Jun. 28, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002]1. Field of the Invention [0003]The present invention relates to a hermetic type compressor, and more particularly to a hermetic type compressor in which refrigerant in a compression chamber is prevented from flowing backward during the operation of the hermetic type compressor. [0004]2. Description of the Related Art [0005]Generally, a hermetic type compressor is employed to compress refrigerant in a refrigerating cycle used in a refrigerator, an air conditioner, and the like, and includes a sealed casing to form an external appearance, a compression device provided in the sealed casing to compress refrigerant, and a driving unit to supply a driving force to the compression device. [0006]Through the sides of the sealed casing, a suction pipe is used to guide a low-pressure refrigerant passing through an evaporator of the refrigerating cycle into the sealed casing, and a discharge pipe is used to guide a high-pressure refrigerant compressed in the sealed casing to a condenser. [0007]The compression device includes a valve device, including a cylinder to form the compression chamber in which the refrigerant is compressed, a piston linearly reciprocating within the compression chamber to compress the refrigerant, a cylinder head coupled to a side of the cylinder in which a refrigerant suctioning chamber and a refrigerant discharging chamber are partitioned, a suction valve disposed between the cylinder and the cylinder head to intermit the refrigerant to be suctioned from a refrigerant suctioning chamber into the compression chamber, and a discharge valve to intermit the refrigerant discharged from the compression chamber into a refrigerant discharging chamber. [0008]A suction muffler is installed on a refrigerant suctioning chamber side of the cylinder head, to reduced noise emissions from the refrigerant being suctioned into the compression chamber. [0009]In the above-described hermetic type compressor, when the driving unit is driven, the piston in the compression chamber reciprocates linearly to generate a pressure difference between the inside and the outside of the compression chamber. [0010]Due to the pressure difference, the low-pressure refrigerant passing through the evaporator passes through the suction pipe, the suction muffler, and the refrigerant suctioning chamber and is suctioned into the compression chamber to be compressed, and the high-pressure refrigerant compressed in and discharged from the compression chamber is supplied to the condenser via the refrigerant discharging chamber and the discharge pipe. [0011]In the conventional hermetic type compressor, although a majority of refrigerant compressed in the compression chamber in a compression cycle of the hermetic type compressor is discharged into the discharging chamber through the discharge valve, some of the refrigerant in the compression chamber is discharged through the suction valve before the suction valve is closed when the piston moves from the bottom dead center to the top dead center and begins to compress the refrigerant. The refrigerant discharged through the suction valve reaches the suction muffler to vibrate in a resonance space formed in the suction muffler, and to vibrate also in an inner space of the sealed casing, resulting in low frequency noise. [0012]Moreover, since the quantity of the refrigerant discharged from the compression chamber to the condenser becomes small as much as the refrigerant discharged to the suction muffler through the suction valve, the compressing capacity of the compressor deteriorates and overall refrigerating capacity of the refrigerating cycle also deteriorates. SUMMARY OF THE INVENTION [0013]The present invention has been made in view of the above-mentioned problems. An aspect of the invention is to provide a hermetic type compressor in which refrigerant is prevented from flowing from a compression chamber to a suction muffler to reduce noise generated from the compressor and to prevent the deterioration of compressing capacity. [0014]In accordance with one embodiment of the invention, the present invention provides a hermetic type compressor having a sealed casing; a compression chamber to compress refrigerant guided into the sealed casing; a refrigerant suctioning chamber communicated with the compression chamber such that the refrigerant is suctioned into the compression chamber; a suction muffler connected to the refrigerant suctioning chamber to reduce noise emissions from the refrigerant being suctioned into the compression chamber; and a check valve installed on a connecting path connecting the refrigerant suctioning chamber to a resonance space formed in the suction muffler to prevent the refrigerant from flowing backward from the compression chamber into the resonance space. [0015]The check valve includes a reed valve to open and close the connecting path; and a stopper to restrict the movement of the reed valve such that the reed valve is opened only in a direction where the refrigerant enters the compression chamber. [0016]The reed valve includes a fixing protrusion, and the connecting path has a fixing groove to accommodate the fixing protrusion such that the reed valve is installed on the connecting path. [0017]The suction muffler includes a guide pipe formed with the connecting path therein, and the guide pipe comprises a first guide pipe including a first extension extended into the resonance space, and a second extension extended out of the resonance space; and a second guide pipe detachably coupled with the second extension of the first guide pipe. [0018]Either the first guide pipe or the second guide pipe is formed with a male thread, and the other of the first guide pipe or the second guide pipe is formed with a female thread such that the first guide pipe is coupled with the second guide pipe. [0019]In accordance with another embodiment of the invention, the present invention provides a hermetic type compressor including a sealed casing; a suction pipe to guide refrigerant out of the sealed casing into the sealed casing; a compression chamber provided to compress the refrigerant guided into the sealed casing through the suction pipe; a suction muffler provided between the compression chamber and the suction pipe to reduce noise emissions from the refrigerant being suctioned into the compression chamber; and a check valve installed to an outlet of the suction muffler to prevent the refrigerant in the suction muffler from flowing backwardly from the compression chamber into the suction muffler. [0020]The check valve includes a reed valve to open and close the outlet of the suction muffler; and a stopper to restrict the movement of the reed valve such that the reed valve is opened only in a direction where the refrigerant enters the compression chamber. [0021]The suction muffler includes a resonance space formed therein, and a guide pipe to form a connecting path to connect the resonance space to the compression chamber. The guide pipe includes a first guide pipe including a first extension extended into the resonance space and a second extension extended out of the resonance space. A second guide pipe is detachably coupled with the second extension of the first guide pipe. Continue reading... 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