US20080118374A1 - Hermetic type compressor with suction pressure adjusting device - Google Patents
Hermetic type compressor with suction pressure adjusting device Download PDFInfo
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- US20080118374A1 US20080118374A1 US11/934,457 US93445707A US2008118374A1 US 20080118374 A1 US20080118374 A1 US 20080118374A1 US 93445707 A US93445707 A US 93445707A US 2008118374 A1 US2008118374 A1 US 2008118374A1
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- Prior art keywords
- opening
- closing member
- suction muffler
- adjusting device
- pressure adjusting
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- 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.)
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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
- F04B39/0027—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
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Definitions
- the present invention relates to a hermetic type compressor.
- the present invention relates to a hermetic type compressor with an improved suction muffler to restrict liquid refrigerant from being suctioned into a compression chamber.
- a compression unit that compresses the refrigerant and a driving unit that provides a driving force to the compression unit are not overloaded.
- a hermetic type compressor is employed in a refrigeration cycle of a refrigerator, an air conditioner, and other similar devices.
- the refrigeration cycle includes a refrigerant, a compressor, a condenser, an expansion device, and an evaporator.
- the compressor compresses the refrigerant into a high temperature and high pressure gaseous state.
- the condenser condenses the gaseous refrigerant transmitted from the compressor into a liquid state.
- the liquid refrigerant then undergoes a throttling expansion in the expansion device and thereby becomes a low temperature and low pressure liquid refrigerant.
- the evaporator evaporates the low-temperature-low-pressure liquid refrigerant into a low pressure and low temperature gaseous refrigerant.
- the gaseous refrigerant is then provided to the compressor.
- the refrigerant circulates in the refrigeration cycle, it provides cooling by absorbing heat when it evaporates and emits heat when it condenses.
- the compressor can be a hermetic type compressor which compresses the low-temperature-low-pressure gaseous refrigerant transmitted from the evaporator of the refrigeration cycle and provides high-temperature-high-pressure gaseous refrigerant to the condenser.
- a high-pressure side and a low-pressure side of the refrigeration cycle are in equilibrium.
- an increased amount of the liquid refrigerant enters the hermetic type compressor.
- compression efficiency of the hermetic type compressor drops, and the refrigerating efficiency of the refrigeration cycle deteriorates.
- the suction muffler guides a great deal of the liquid refrigerant to the refrigerant suction chamber together with the gaseous refrigerant, when the compressor is initially started or restarted, the compression efficiency of the refrigerant deteriorates, noise increases, and excess power is consumed.
- an aspect of the invention is to provide a hermetic type compressor in which a suction muffler substantially prevents liquid refrigerant from being suctioned into a compression chamber and prevents overloading of a compression unit to compress the refrigerant and a driving unit to provide a driving force to the compression unit.
- the hermetic type compressor includes a sealed casing, a suction pipe, a suction muffler, a compression unit, a driving unit, and a pressure adjusting unit.
- the suction pipe penetrates a side of the sealed casing.
- the suction muffler, the compression unit, and the driving unit are within the sealed casing.
- the suction muffler is coupled to the suction pipe, and the compression unit is coupled to suction muffler.
- the driving unit is coupled to the compression unit.
- the pressure adjusting device is provided on the suction muffler and configured to discharge liquid refrigerant into the sealed casing. The pressure adjusting device maintains the internal pressure of the suction muffler substantially constant.
- the pressure adjusting device for a suction muffler of a compression unit.
- the pressure adjusting device includes an opening formed at a side of the suction muffler, an opening and closing member, and an elastic member.
- the opening and closing member is coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening.
- the elastic member has one end to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening.
- the opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
- the pressure adjusting device for a suction muffler of a compression unit.
- the pressure adjusting device includes an opening formed at a side of the suction muffler, an opening and closing member, a penetrating hole, a corresponding penetration, a hinge shaft, and a torsion spring.
- the opening and closing member is pivotably coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening.
- the opening and closing member is formed with a cut-out part.
- the penetrating hole is disposed on the opening and closing member.
- the corresponding penetration is disposed substantially adjacent to the opening.
- the hinge shaft is disposed in the penetrating hole and the corresponding penetration.
- the torsion spring is disposed on the hinge shaft with an end coupled to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening.
- the opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
- FIG. 1 is a sectional view of a hermetic type compressor according to an embodiment of the present invention
- FIG. 2 is a perspective view of a suction muffler of the hermetic type compressor illustrated in FIG. 1 ;
- FIG. 3 is an exploded perspective of a pressure adjusting device of the suction muffler illustrated in FIG. 2 ;
- FIG. 4 is a sectional view of the suction muffler illustrating the operation of the pressure adjusting device when an opening and closing member of the pressure adjusting device is open;
- FIG. 5 is a sectional view of the suction muffler illustrating the operation of the pressure adjusting device when the opening and closing member is closed.
- the hermetic type compressor includes a sealed casing 1 to form an exterior, a suction pipe 2 installed on a side of the sealed casing 1 to guide refrigerant from an evaporator of a refrigeration cycle into the sealed casing 1 , and a discharge pipe 3 installed on the opposite side of the sealed casing 1 to guide the refrigerant compressed in the sealed casing 1 into a condenser of the refrigeration cycle.
- a compression unit 10 and a driving unit 20 are installed on a frame 30 .
- the compression unit 10 is disposed substantially adjacent to a side of the frame 30
- the driving unit 20 is disposed substantially adjacent to an opposite side of the frame 30 .
- the compression unit 10 compresses the refrigerant
- the driving unit 20 supplies a driving force for the compression of the refrigerant.
- a shaft 40 is preferably rotatably installed in a substantially central area of the frame 30 and transmits the driving force of the driving unit 20 to the compression unit 10 .
- the driving unit 20 is disposed on an upper side of the frame 30
- the compression unit 10 is disposed on a lower side of the frame 30
- an upper portion of the shaft 40 extends into the upper side of the frame 30
- a lower portion of the shaft 40 extends into the lower side of the frame 30 .
- the driving unit 20 includes a stator 21 fixed to one side of the frame 30 and a rotor 22 installed in the stator 21 .
- the rotor 22 rotates due to electrical interaction with the stator 21 .
- the upper portion of the shaft 40 is received into the center of the rotor 22 and rotates with the rotor 22 .
- the lower portion of the shaft 40 is formed with an eccentric shaft 41 to be eccentrically rotated.
- a longitudinal axis 40 a of the shaft 40 is not concentric with a longitudinal axis 41 a of the eccentric shaft 41 .
- the eccentric shaft 41 travels in a circular path around the longitudinal axis of the shaft 40 .
- the compression unit 10 includes a cylinder 11 formed with a compression chamber 11 a , a piston 12 installed to linearly reciprocate within the compression chamber 11 a , a cylinder head 13 coupled with a side of the cylinder 11 to seal the compression chamber 11 a , and a valve device 14 disposed between the cylinder 11 and the cylinder head 13 .
- the piston 12 is connected to the eccentric shaft 41 by a connecting rod 15 .
- the cylinder head 13 has a refrigerant suction chamber 13 a and a refrigerant discharge chamber 13 b partitioned from each other.
- the valve device 14 controls the flow of the refrigerant to be suctioned from the refrigerant suction chamber 13 a into the compression chamber 11 a or to be discharged from the compression chamber 11 a into the refrigerant discharge chamber 13 b.
- a suction muffler 50 is installed between the refrigerant suction chamber 13 a and the suction pipe 2 to reduce pressure ripples in the refrigerant entering the refrigerant suction chamber 13 a so as to reduce noise.
- the suction muffler 50 includes a main body 60 and a refrigerant guide pipe 70 .
- the refrigerant guide pipe 70 is inserted into the refrigerant suction chamber 13 a of the cylinder head 13 .
- the eccentric shaft 41 converts the rotation of the shaft 40 into a linearly reciprocating movement of the piston 12 . Since the piston 12 is coupled to the eccentric shaft 41 by the connecting rod 15 , when the eccentric shaft 41 eccentrically rotates, the piston 12 linearly reciprocates within the compression chamber 11 a . The linearly reciprocating motion of the piston 12 gives rise to a suction pressure alternating with a discharge pressure within the compression chamber 11 a.
- the suction pressure developed by the motion of the piston 12 causes the refrigerant from the evaporator to move through the suction pipe 2 to the main body 60 of the suction muffler 50 .
- the refrigerant is diffused in the main body 60 and enters the refrigerant suction chamber 13 a through refrigerant guide pipe 70 with reduced pressure ripples.
- the refrigerant is then suctioned into the compression chamber 11 a from the refrigerant suction chamber 13 a through the valve device 14 .
- the eccentric shaft 41 rotates to cause the piston 12 to move towards the cylinder head 13
- the refrigerant is compressed in the compression chamber 11 a .
- the piston 12 moving towards the cylinder head 13 also discharges the refrigerant from the compression chamber 11 a into the refrigerant discharge chamber 13 b through the valve device 14 .
- the refrigerant is then transmitted by the discharge pipe 3 to a condenser outside the sealed casing 1 .
- a high-pressure side of the refrigeration cycle reaches equilibrium with a low-pressure side of the refrigeration cycle.
- an increased amount of the liquid refrigerant enters the hermetic type compressor.
- compression efficiency of the hermetic type compressor drops, and the refrigerating efficiency of the refrigeration cycle deteriorates.
- the load applied to the compression unit 10 to suction the refrigerant liquid and the driving unit 20 to drive the compression unit increases.
- the increased load increases the noise of the hermetic type compressor and increases power loss.
- the suction muffler 50 is shown.
- the hermetic type compressor according to the present invention is provided with a pressure adjusting device 80 on a side of the main body 60 of the suction muffler 50 to keep internal pressure of the suction muffler 50 substantially constant.
- the suction muffler includes the main body 60 , an upper body 61 , a lower body 62 , a suction port 60 a , the refrigerant guide pipe 70 , and the pressure adjusting device 80 .
- the upper body 61 coupled with the lower body 62 to form the main body 60 .
- the main body 60 has a suction port 60 a formed at a side thereof.
- the suction pipe 2 is coupled with the suction port 60 a by interposing a coil spring 4 therebetween (shown in FIGS. 4 and 5 ).
- the pressure adjusting device 80 includes an opening 81 preferably penetrating an upper side of the upper body 61 , a step 81 a disposed on an edge of the opening 81 , an opening and closing member 82 installed to open and close the opening 81 , and an elastic member 83 to provide a force to move the opening and closing member 82 towards the opening 81 .
- the opening and closing member 82 is formed substantially as a plate with a predetermined size and hinged to a side of the opening 81 to pivot to open and close the opening 81 .
- the step 81 a supports the opening and closing member 82 when it closes the opening 81 and prevents the opening and closing member 82 from pivoting into the opening 81 .
- penetrating holes 82 a are formed at an end of the opening and closing member 82 .
- Corresponding penetrations 81 b are formed substantially adjacent to the opening 81 and align with the penetrating holes 82 a on the opening and closing member 82 .
- the opening and closing member 82 pivots about a hinge shaft 84 received in the penetrating holes 82 a and the corresponding penetrations 81 b .
- the elastic member is disposed on the hinge shaft 84 .
- the elastic member 83 is a torsion spring.
- the opening and closing member 82 is formed with a cut-out part 82 b .
- the cutout part 82 b is disposed on an end of the opening and closing member 82 to correspond with an intermediate portion of the hinge shaft 84 .
- the elastic member 83 is wound around the hinge shaft 84 where the hinge shaft 84 is exposed by the cut-out part 82 b .
- An end of the elastic member 83 is supported by an inner surface of the upper body 61 , and an opposite end of the elastic member 83 is supported by an outer surface of the opening and closing member 82 .
- the elastic member 83 elastically supports the opening and closing member 82 in a direction towards the opening 81 .
- the step 81 a prevents the opening and closing member 82 from pivoting into the opening 81 when the opening and closing member 82 is closing the opening 81 .
- the weight of the opening and closing member 82 and the elasticity of the elastic member 83 are set such that the opening and closing member 82 opens when an excess quantity of the liquid refrigerant enters the suction muffler 50 and an internal pressure of the suction muffler 50 increases over a predetermined value.
- the opening and closing member 82 opens so that a substantial portion of the liquid refrigerant is discharged into the sealed casing 1 through the opening 81 .
- the pressure adjusting device 80 prevents an excessive quantity of the liquid refrigerant from entering the compression chamber 11 a and being transmitted to the condenser of the refrigeration cycle. Therefore, the compression efficiency of the refrigerant and the refrigerating efficiency of the refrigeration cycle is substantially maintained.
- the pressure adjusting device 80 discharges a majority of the refrigerant liquid into the sealed casing 1 through the opening 81 thereby preventing the internal pressure of the suction muffler 50 from increasing.
- the compression unit 10 and the driving unit 20 are not excessively overloaded. Therefore, the hermetic type compressor emits less noise and power loss does not increase.
- FIGS. 4 and 5 illustrate the operation of the pressure adjusting device 80 .
- the suction muffler 50 is shown in cross-section with arrows to indicate the flow of the refrigerant.
- the refrigerant guide pipe 70 includes in inlet port 71 to receive the refrigerant and an outlet port 72 to discharge the refrigerant.
- the refrigerant guide pipe 70 extends into the main body 60 by a predetermined length.
- the suction muffler 50 is installed such that the outlet port 72 is inserted into the refrigerant suction chamber 13 a of the cylinder head 13 .
- the refrigerant enters the suction muffler 50 from the evaporator via the suction pipe 2 , the coil spring 4 , and the suction port 60 a .
- the refrigerant is subsequently diffused into the main body 60 to reduce the pressure ripples and is guided to the refrigerant guide pipe 70 .
- a small gap is provided between the inner surface of the upper body 61 and the inlet port 71 of the refrigerant guide pipe 70 .
- a small gap is provided to increase the flow rate of the refrigerant.
- the refrigerant enters the refrigerant guide pipe 70 through the inlet port 71 and then enters the refrigerant suction chamber 13 a through the outlet port 72 .
- the opening 81 is preferably formed at a position in the upper body 61 near where the inlet port 71 is formed and where the flow rate is increased so that the liquid refrigerant is more effectively discharged through the opening 81 .
- the opening and closing member 82 pivots outward to open the opening 81 .
- An angle between the opening 81 and the opening and closing member 82 increases in proportion to the internal pressure of the suction muffler 50 .
- the liquid refrigerant entering the main body 60 of the suction muffler 50 is discharged through the opening 81 into the sealed casing 1 , the liquid refrigerant is substantially prevented from being suctioned into the compression chamber 11 a or being transmitted to the condenser of the refrigeration cycle.
- the load applied to the compression unit 10 and the driving unit 20 does not increase.
- the liquid refrigerant discharged into the sealed casing 1 through the opening 81 when the hermetic type compressor starts or restarts evaporates and enters the suction muffler 50 through the coil spring 4 .
- the liquid refrigerant evaporates when an internal temperature of the sealed casing 1 increases.
- the refrigerant that enters the suction muffler 50 through the coil spring 4 is guided to the refrigerant suction chamber 13 a together with the refrigerant from the suction pipe 2 .
- the opening and closing member 82 pivots towards the opening 81 due to the elastic force of the elastic member 83 .
- the opening 81 closed all the refrigerant entering the main body 60 enters the refrigerant suction chamber 13 a through the refrigerant guide pipe 70 and is transmitted to the compressing chamber 11 a.
- the hermetic type compressor includes a pressure adjusting device provided on a side of a suction muffler to maintain the internal pressure in the suction muffler substantially constant.
- a pressure adjusting device provided on a side of a suction muffler to maintain the internal pressure in the suction muffler substantially constant.
- the pressure adjusting device discharges a majority of the liquid refrigerant entering the suction muffler into the sealed casing thereby substantially maintaining the internal pressure of the suction muffler substantially constant.
- the hermetic type compressor of the present invention effectively prevents the liquid refrigerant from being suctioned into the compression chamber and transmitted to the condenser of the refrigeration cycle during initial start and restarts.
- the hermetic type compressor of the present invention effectively prevents an increase in the load on the compression unit and the driving unit.
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Abstract
A hermetic type compressor that includes a sealed casing, a suction pipe, a suction muffler, a compression unit, a driving unit, and a pressure adjusting unit. The suction pipe penetrates a side of the sealed casing. The suction muffler, the compression unit, and the driving unit are within the sealed casing. The suction muffler is coupled to the suction pipe, and the compression unit is coupled to suction muffler. The driving unit is coupled to the compression unit. The pressure adjusting device is on the suction muffler and configured to discharge liquid refrigerant into the sealed casing. The pressure adjusting device maintains the internal pressure of the suction muffler substantially constant.
Description
- This application claims the benefit of Korean Patent Application No. 2006-114792, filed on Nov. 20, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
- The present invention relates to a hermetic type compressor. In particular, the present invention relates to a hermetic type compressor with an improved suction muffler to restrict liquid refrigerant from being suctioned into a compression chamber. By restricting liquid refrigerant, a compression unit that compresses the refrigerant and a driving unit that provides a driving force to the compression unit are not overloaded.
- Generally, a hermetic type compressor is employed in a refrigeration cycle of a refrigerator, an air conditioner, and other similar devices. The refrigeration cycle includes a refrigerant, a compressor, a condenser, an expansion device, and an evaporator. The compressor compresses the refrigerant into a high temperature and high pressure gaseous state. The condenser condenses the gaseous refrigerant transmitted from the compressor into a liquid state. The liquid refrigerant then undergoes a throttling expansion in the expansion device and thereby becomes a low temperature and low pressure liquid refrigerant. The evaporator evaporates the low-temperature-low-pressure liquid refrigerant into a low pressure and low temperature gaseous refrigerant. The gaseous refrigerant is then provided to the compressor. As the refrigerant circulates in the refrigeration cycle, it provides cooling by absorbing heat when it evaporates and emits heat when it condenses.
- The compressor can be a hermetic type compressor which compresses the low-temperature-low-pressure gaseous refrigerant transmitted from the evaporator of the refrigeration cycle and provides high-temperature-high-pressure gaseous refrigerant to the condenser. Typically, before the hermetic type compressor is started or restarted after being stopped for a predetermined time, a high-pressure side and a low-pressure side of the refrigeration cycle are in equilibrium. When the high-pressure side and the low-pressure side are in equilibrium, an increased amount of the liquid refrigerant enters the hermetic type compressor. When an excessive quantity of the liquid refrigerant is suctioned into and compressed in the compression chamber together with the gaseous refrigerant, compression efficiency of the hermetic type compressor drops, and the refrigerating efficiency of the refrigeration cycle deteriorates.
- Moreover, when a larger amount of the liquid refrigerant is transmitted into the suction muffler, the load applied to the compression unit to suction the refrigerant liquid increases, thereby increasing the load on the driving unit to drive the compression unit. The increased load on the compression unit and the driving unit increases the noise of the hermetic type compressor and increases power loss. Thus, in the conventional hermetic type compressor, because the suction muffler guides a great deal of the liquid refrigerant to the refrigerant suction chamber together with the gaseous refrigerant, when the compressor is initially started or restarted, the compression efficiency of the refrigerant deteriorates, noise increases, and excess power is consumed.
- Accordingly, an aspect of the invention is to provide a hermetic type compressor in which a suction muffler substantially prevents liquid refrigerant from being suctioned into a compression chamber and prevents overloading of a compression unit to compress the refrigerant and a driving unit to provide a driving force to the compression unit.
- One embodiment of the present invention provides a hermetic type compressor. The hermetic type compressor includes a sealed casing, a suction pipe, a suction muffler, a compression unit, a driving unit, and a pressure adjusting unit. The suction pipe penetrates a side of the sealed casing. The suction muffler, the compression unit, and the driving unit are within the sealed casing. The suction muffler is coupled to the suction pipe, and the compression unit is coupled to suction muffler. The driving unit is coupled to the compression unit. The pressure adjusting device is provided on the suction muffler and configured to discharge liquid refrigerant into the sealed casing. The pressure adjusting device maintains the internal pressure of the suction muffler substantially constant.
- Another embodiment of the present invention provides a pressure adjusting device for a suction muffler of a compression unit. The pressure adjusting device includes an opening formed at a side of the suction muffler, an opening and closing member, and an elastic member. The opening and closing member is coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening. The elastic member has one end to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening. The opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
- Yet another embodiment of the present invention provides a pressure adjusting device for a suction muffler of a compression unit. The pressure adjusting device includes an opening formed at a side of the suction muffler, an opening and closing member, a penetrating hole, a corresponding penetration, a hinge shaft, and a torsion spring. The opening and closing member is pivotably coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening. The opening and closing member is formed with a cut-out part. The penetrating hole is disposed on the opening and closing member. The corresponding penetration is disposed substantially adjacent to the opening. The hinge shaft is disposed in the penetrating hole and the corresponding penetration. The torsion spring is disposed on the hinge shaft with an end coupled to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening. The opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
- Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
- These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:
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FIG. 1 is a sectional view of a hermetic type compressor according to an embodiment of the present invention; -
FIG. 2 is a perspective view of a suction muffler of the hermetic type compressor illustrated inFIG. 1 ; -
FIG. 3 is an exploded perspective of a pressure adjusting device of the suction muffler illustrated inFIG. 2 ; -
FIG. 4 is a sectional view of the suction muffler illustrating the operation of the pressure adjusting device when an opening and closing member of the pressure adjusting device is open; and -
FIG. 5 is a sectional view of the suction muffler illustrating the operation of the pressure adjusting device when the opening and closing member is closed. - Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
- Referring to
FIG. 1 , a hermetic type compressor according to an embodiment of the present invention is shown. The hermetic type compressor includes a sealedcasing 1 to form an exterior, a suction pipe 2 installed on a side of the sealedcasing 1 to guide refrigerant from an evaporator of a refrigeration cycle into the sealedcasing 1, and a discharge pipe 3 installed on the opposite side of the sealedcasing 1 to guide the refrigerant compressed in the sealedcasing 1 into a condenser of the refrigeration cycle. - In the sealed
casing 1, acompression unit 10 and adriving unit 20 are installed on aframe 30. Thecompression unit 10 is disposed substantially adjacent to a side of theframe 30, and thedriving unit 20 is disposed substantially adjacent to an opposite side of theframe 30. Thecompression unit 10 compresses the refrigerant, and thedriving unit 20 supplies a driving force for the compression of the refrigerant. Ashaft 40 is preferably rotatably installed in a substantially central area of theframe 30 and transmits the driving force of thedriving unit 20 to thecompression unit 10. - In the embodiment shown, the
driving unit 20 is disposed on an upper side of theframe 30, and thecompression unit 10 is disposed on a lower side of theframe 30. Also, an upper portion of theshaft 40 extends into the upper side of theframe 30, and a lower portion of theshaft 40 extends into the lower side of theframe 30. - The
driving unit 20 includes astator 21 fixed to one side of theframe 30 and arotor 22 installed in thestator 21. Therotor 22 rotates due to electrical interaction with thestator 21. In the embodiment shown, the upper portion of theshaft 40 is received into the center of therotor 22 and rotates with therotor 22. The lower portion of theshaft 40 is formed with aneccentric shaft 41 to be eccentrically rotated. In the embodiment shown, alongitudinal axis 40 a of theshaft 40 is not concentric with alongitudinal axis 41 a of theeccentric shaft 41. Thus when theshaft 40 rotates, theeccentric shaft 41 travels in a circular path around the longitudinal axis of theshaft 40. - The
compression unit 10 includes acylinder 11 formed with acompression chamber 11 a, apiston 12 installed to linearly reciprocate within thecompression chamber 11 a, acylinder head 13 coupled with a side of thecylinder 11 to seal thecompression chamber 11 a, and avalve device 14 disposed between thecylinder 11 and thecylinder head 13. Thepiston 12 is connected to theeccentric shaft 41 by a connectingrod 15. Thecylinder head 13 has arefrigerant suction chamber 13 a and arefrigerant discharge chamber 13 b partitioned from each other. Thevalve device 14 controls the flow of the refrigerant to be suctioned from therefrigerant suction chamber 13 a into thecompression chamber 11 a or to be discharged from thecompression chamber 11 a into therefrigerant discharge chamber 13 b. - Between the
refrigerant suction chamber 13 a and the suction pipe 2, asuction muffler 50 is installed to reduce pressure ripples in the refrigerant entering therefrigerant suction chamber 13 a so as to reduce noise. Thesuction muffler 50 includes amain body 60 and arefrigerant guide pipe 70. Therefrigerant guide pipe 70 is inserted into therefrigerant suction chamber 13 a of thecylinder head 13. - When the driving
unit 20 causes theshaft 40 to rotate, theeccentric shaft 41 converts the rotation of theshaft 40 into a linearly reciprocating movement of thepiston 12. Since thepiston 12 is coupled to theeccentric shaft 41 by the connectingrod 15, when theeccentric shaft 41 eccentrically rotates, thepiston 12 linearly reciprocates within thecompression chamber 11 a. The linearly reciprocating motion of thepiston 12 gives rise to a suction pressure alternating with a discharge pressure within thecompression chamber 11 a. - As the
eccentric shaft 41 rotates to cause thepiston 12 to move away from thecylinder head 13, the suction pressure developed by the motion of thepiston 12 causes the refrigerant from the evaporator to move through the suction pipe 2 to themain body 60 of thesuction muffler 50. The refrigerant is diffused in themain body 60 and enters therefrigerant suction chamber 13 a throughrefrigerant guide pipe 70 with reduced pressure ripples. The refrigerant is then suctioned into thecompression chamber 11 a from therefrigerant suction chamber 13 a through thevalve device 14. - Then, as the
eccentric shaft 41 rotates to cause thepiston 12 to move towards thecylinder head 13, the refrigerant is compressed in thecompression chamber 11 a. Thepiston 12 moving towards thecylinder head 13 also discharges the refrigerant from thecompression chamber 11 a into therefrigerant discharge chamber 13 b through thevalve device 14. The refrigerant is then transmitted by the discharge pipe 3 to a condenser outside the sealedcasing 1. - When the hermetic type compressor initially starts or restarts after being stopped for a predetermined time, a high-pressure side of the refrigeration cycle reaches equilibrium with a low-pressure side of the refrigeration cycle. When the high-pressure side and low-pressure side are in equilibrium, an increased amount of the liquid refrigerant enters the hermetic type compressor. When an excessive quantity of the liquid refrigerant is suctioned into and compressed in the
compression chamber 11 a together with the gaseous refrigerant, compression efficiency of the hermetic type compressor drops, and the refrigerating efficiency of the refrigeration cycle deteriorates. When a larger amount of the liquid refrigerant is transmitted into thesuction muffler 50, the load applied to thecompression unit 10 to suction the refrigerant liquid and the drivingunit 20 to drive the compression unit increases. The increased load increases the noise of the hermetic type compressor and increases power loss. - Referring to
FIG. 2 , thesuction muffler 50 is shown. To prevent significant suctioning of the liquid refrigerant into thecompression chamber 11 a, the hermetic type compressor according to the present invention is provided with apressure adjusting device 80 on a side of themain body 60 of thesuction muffler 50 to keep internal pressure of thesuction muffler 50 substantially constant. - The suction muffler includes the
main body 60, anupper body 61, alower body 62, asuction port 60 a, therefrigerant guide pipe 70, and thepressure adjusting device 80. Theupper body 61 coupled with thelower body 62 to form themain body 60. Themain body 60 has asuction port 60 a formed at a side thereof. The suction pipe 2 is coupled with thesuction port 60 a by interposing a coil spring 4 therebetween (shown inFIGS. 4 and 5 ). - Referring to
FIG. 3 , thepressure adjusting device 80 is shown. Thepressure adjusting device 80 includes anopening 81 preferably penetrating an upper side of theupper body 61, astep 81 a disposed on an edge of theopening 81, an opening and closingmember 82 installed to open and close theopening 81, and anelastic member 83 to provide a force to move the opening and closingmember 82 towards theopening 81. - Preferably, the opening and closing
member 82 is formed substantially as a plate with a predetermined size and hinged to a side of theopening 81 to pivot to open and close theopening 81. Thestep 81 a supports the opening and closingmember 82 when it closes theopening 81 and prevents the opening and closingmember 82 from pivoting into theopening 81. - To hingedly couple the opening and closing
member 82, penetratingholes 82 a are formed at an end of the opening and closingmember 82. Correspondingpenetrations 81 b are formed substantially adjacent to theopening 81 and align with the penetratingholes 82 a on the opening and closingmember 82. The opening and closingmember 82 pivots about ahinge shaft 84 received in the penetratingholes 82 a and the correspondingpenetrations 81 b. The elastic member is disposed on thehinge shaft 84. In the embodiment shown, theelastic member 83 is a torsion spring. - To dispose the
elastic member 83 on thehinge shaft 84, the opening and closingmember 82 is formed with a cut-outpart 82 b. Thecutout part 82 b is disposed on an end of the opening and closingmember 82 to correspond with an intermediate portion of thehinge shaft 84. Theelastic member 83 is wound around thehinge shaft 84 where thehinge shaft 84 is exposed by the cut-outpart 82 b. An end of theelastic member 83 is supported by an inner surface of theupper body 61, and an opposite end of theelastic member 83 is supported by an outer surface of the opening and closingmember 82. Thus, theelastic member 83 elastically supports the opening and closingmember 82 in a direction towards theopening 81. Thestep 81 a prevents the opening and closingmember 82 from pivoting into theopening 81 when the opening and closingmember 82 is closing theopening 81. - The weight of the opening and closing
member 82 and the elasticity of theelastic member 83 are set such that the opening and closingmember 82 opens when an excess quantity of the liquid refrigerant enters thesuction muffler 50 and an internal pressure of thesuction muffler 50 increases over a predetermined value. When the internal pressure of thesuction muffler 50 is higher than the predetermined value, the opening and closingmember 82 opens so that a substantial portion of the liquid refrigerant is discharged into the sealedcasing 1 through theopening 81. - Thus, in the hermetic type compressor according to the present invention, the
pressure adjusting device 80 prevents an excessive quantity of the liquid refrigerant from entering thecompression chamber 11 a and being transmitted to the condenser of the refrigeration cycle. Therefore, the compression efficiency of the refrigerant and the refrigerating efficiency of the refrigeration cycle is substantially maintained. - Moreover, when the hermetic type compressor initially starts or restarts and an excessive quantity of the liquid refrigerant is transmitted into the
suction muffler 50, thepressure adjusting device 80 discharges a majority of the refrigerant liquid into the sealedcasing 1 through theopening 81 thereby preventing the internal pressure of thesuction muffler 50 from increasing. Thus, thecompression unit 10 and the drivingunit 20 are not excessively overloaded. Therefore, the hermetic type compressor emits less noise and power loss does not increase. -
FIGS. 4 and 5 illustrate the operation of thepressure adjusting device 80. Referring toFIG. 4 , thesuction muffler 50 is shown in cross-section with arrows to indicate the flow of the refrigerant. Therefrigerant guide pipe 70 includes ininlet port 71 to receive the refrigerant and anoutlet port 72 to discharge the refrigerant. Therefrigerant guide pipe 70 extends into themain body 60 by a predetermined length. Thesuction muffler 50 is installed such that theoutlet port 72 is inserted into therefrigerant suction chamber 13 a of thecylinder head 13. - The refrigerant enters the
suction muffler 50 from the evaporator via the suction pipe 2, the coil spring 4, and thesuction port 60 a. The refrigerant is subsequently diffused into themain body 60 to reduce the pressure ripples and is guided to therefrigerant guide pipe 70. Preferably, between the inner surface of theupper body 61 and theinlet port 71 of therefrigerant guide pipe 70, a small gap is provided to increase the flow rate of the refrigerant. The refrigerant enters therefrigerant guide pipe 70 through theinlet port 71 and then enters therefrigerant suction chamber 13 a through theoutlet port 72. - The
opening 81 is preferably formed at a position in theupper body 61 near where theinlet port 71 is formed and where the flow rate is increased so that the liquid refrigerant is more effectively discharged through theopening 81. Thus, when the internal pressure of thesuction muffler 50 increases, the opening and closingmember 82 pivots outward to open theopening 81. An angle between theopening 81 and the opening and closingmember 82 increases in proportion to the internal pressure of thesuction muffler 50. - Since a majority of the liquid refrigerant entering the
main body 60 of thesuction muffler 50 is discharged through theopening 81 into the sealedcasing 1, the liquid refrigerant is substantially prevented from being suctioned into thecompression chamber 11 a or being transmitted to the condenser of the refrigeration cycle. Thus, the load applied to thecompression unit 10 and the drivingunit 20 does not increase. - The liquid refrigerant discharged into the sealed
casing 1 through theopening 81 when the hermetic type compressor starts or restarts evaporates and enters thesuction muffler 50 through the coil spring 4. The liquid refrigerant evaporates when an internal temperature of the sealedcasing 1 increases. The refrigerant that enters thesuction muffler 50 through the coil spring 4 is guided to therefrigerant suction chamber 13 a together with the refrigerant from the suction pipe 2. - Referring to
FIG. 5 , after startup as the hermetic type compressor is continuously driven and the quantity of the liquid refrigerant decreases, the internal pressure falls below the predetermined value, and the opening and closingmember 82 pivots towards the opening 81 due to the elastic force of theelastic member 83. When theopening 81 closed, all the refrigerant entering themain body 60 enters therefrigerant suction chamber 13 a through therefrigerant guide pipe 70 and is transmitted to the compressingchamber 11 a. - As described above, the hermetic type compressor according to the present invention includes a pressure adjusting device provided on a side of a suction muffler to maintain the internal pressure in the suction muffler substantially constant. When the hermetic type compressor initially starts or restarts, excessive liquid refrigerant enters the suction muffler and increases the internal pressure. The pressure adjusting device discharges a majority of the liquid refrigerant entering the suction muffler into the sealed casing thereby substantially maintaining the internal pressure of the suction muffler substantially constant. The hermetic type compressor of the present invention effectively prevents the liquid refrigerant from being suctioned into the compression chamber and transmitted to the condenser of the refrigeration cycle during initial start and restarts. Also, the hermetic type compressor of the present invention effectively prevents an increase in the load on the compression unit and the driving unit.
- Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (15)
1. A hermetic type compressor comprising:
a sealed casing;
a suction pipe penetrating a side of the sealed casing;
a suction muffler disposed within the sealed casing and coupled to the suction pipe;
a compression unit disposed within the sealed casing and coupled to the suction muffler;
a driving unit disposed within the sealed casing and coupled to the compression unit; and
a pressure adjusting device provided on the suction muffler maintaining internal pressure of the suction muffler substantially constant, the pressure adjusting device configured to discharge liquid refrigerant into the sealed casing.
2. The hermetic type compressor according to claim 1 , wherein the suction muffler further comprises:
a main body including a suction port formed at a side thereof; and
a refrigerant guide pipe including an end extended into the main body by a predetermined length to guide refrigerant guided into the main body to the compression unit.
3. The hermetic type compressor according to claim 2 , wherein the pressure adjusting device further comprises:
an opening formed at a side of the main body;
an opening and closing member installed substantially adjacent to the opening; and
an elastic member biasing the opening and closing member to close the opening.
4. The hermetic type compressor according to claim 2 , wherein the opening and closing member is hinged to an end of the opening and pivots to open and close the opening.
5. The hermetic type compressor according to claim 3 , wherein the pressure adjusting device further comprises a hinge shaft penetrating an end of the opening and closing member and coupled with the main body of the suction muffler positioned at the opening.
6. The hermetic type compressor according to claim 3 , wherein the elastic member comprises a torsion spring wound around the hinge shaft and having an end supported by an inner side of the main body and an opposite end supported by an outer surface of the opening and closing member.
7. The hermetic type compressor according to claim 3 , wherein the opening is formed at a position near an end of the refrigerant guide pipe.
8. The hermetic type compressor according to claim 3 , wherein the opening further comprises a step to prevent the opening and closing member from being pivoted into the opening.
9. A pressure adjusting device for a suction muffler of a compression unit comprising:
an opening formed at a side of the suction muffler;
an opening and closing member pivotably coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening; and
an elastic member with one end coupled to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening;
wherein the opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
10. The pressure adjusting device according to claim 9 , wherein the opening further comprises a step to prevent the opening and closing member from being pivoted into the opening.
11. The pressure adjusting device according to claim 9 , further comprising:
a penetrating hole disposed substantially adjacent to the opening;
a corresponding penetration disposed on the opening and closing member, the corresponding penetration aligning with the penetrating hole; and
a hinge shaft disposed in the penetrating hole and the corresponding penetration.
12. The pressure adjusting device according to claim 9 , wherein the elastic member is a torsion spring with an end coupled to the side of the suction muffler and another end coupled to the opening and closing member.
13. The pressure adjusting device according to claim 12 , wherein the torsion spring is disposed on the hinge shaft.
14. A pressure adjusting device for a suction muffler of a compression unit comprising:
an opening formed at a side of the suction muffler;
an opening and closing member pivotably coupled to the side of the suction muffler substantially adjacent to the opening to open and close the opening, the opening and closing member formed with a cut-out part;
a penetrating hole disposed on the opening and closing member;
a corresponding penetration disposed substantially adjacent to the opening, the corresponding penetration aligning with the penetrating hole;
a hinge shaft disposed in the penetrating hole and the corresponding penetration; and
a torsion spring disposed on the hinge shaft with an end coupled to the side of the suction muffler and another end coupled to the opening and closing member biasing the opening and closing member towards the opening;
wherein the opening and closing member opens when an internal pressure of the suction muffler increases above a predetermined value.
15. The pressure adjusting device according to claim 14 , wherein the opening further comprises a step to prevent the opening and closing member from being pivoted into the opening.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2006-114792 | 2006-11-20 | ||
KR1020060114792A KR20080045558A (en) | 2006-11-20 | 2006-11-20 | Hermetic type compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080118374A1 true US20080118374A1 (en) | 2008-05-22 |
Family
ID=39417133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/934,457 Abandoned US20080118374A1 (en) | 2006-11-20 | 2007-11-02 | Hermetic type compressor with suction pressure adjusting device |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080118374A1 (en) |
KR (1) | KR20080045558A (en) |
BR (1) | BRPI0704060A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104564609A (en) * | 2015-01-05 | 2015-04-29 | 安徽美芝制冷设备有限公司 | Piston type compressor and air-suction silencer thereof |
WO2017211705A1 (en) * | 2016-06-07 | 2017-12-14 | Arcelik Anonim Sirketi | A hermetic compressor comprising a partially-elastic suction muffler |
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US6581721B2 (en) * | 2000-09-20 | 2003-06-24 | Calsonic Kansei Corporation | Valve for a control muffler |
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-
2006
- 2006-11-20 KR KR1020060114792A patent/KR20080045558A/en not_active Application Discontinuation
-
2007
- 2007-11-02 US US11/934,457 patent/US20080118374A1/en not_active Abandoned
- 2007-11-08 BR BRPI0704060-1A patent/BRPI0704060A/en not_active IP Right Cessation
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104564609A (en) * | 2015-01-05 | 2015-04-29 | 安徽美芝制冷设备有限公司 | Piston type compressor and air-suction silencer thereof |
WO2017211705A1 (en) * | 2016-06-07 | 2017-12-14 | Arcelik Anonim Sirketi | A hermetic compressor comprising a partially-elastic suction muffler |
Also Published As
Publication number | Publication date |
---|---|
BRPI0704060A (en) | 2008-07-08 |
KR20080045558A (en) | 2008-05-23 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SAMSUNG GWANGJU ELECTRONICS CO., LTD., KOREA, REPU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YUN, MIN-CHEUL;REEL/FRAME:020068/0079 Effective date: 20071023 |
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AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO,. LTD., KOREA, DEMOCRATIC P Free format text: MERGER;ASSIGNOR:SAMSUNG GWANGJU ELECTRONICS CO., LTD.;REEL/FRAME:026238/0536 Effective date: 20110110 |
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STCB | Information on status: application discontinuation |
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