US20220106953A1 - Heat dissipation assembly for a linear compressor - Google Patents
Heat dissipation assembly for a linear compressor Download PDFInfo
- Publication number
- US20220106953A1 US20220106953A1 US17/064,725 US202017064725A US2022106953A1 US 20220106953 A1 US20220106953 A1 US 20220106953A1 US 202017064725 A US202017064725 A US 202017064725A US 2022106953 A1 US2022106953 A1 US 2022106953A1
- Authority
- US
- United States
- Prior art keywords
- compressor
- housing
- distribution conduit
- discharge ports
- heat dissipation
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
-
- 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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
-
- 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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
-
- 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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
- F04B39/0261—Hermetic compressors with an auxiliary oil pump
-
- 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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
- F04B39/0269—Hermetic compressors with device for spraying lubricant or with mist lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/003—General constructional features for cooling refrigerating machinery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/006—Cooling of compressor or motor
Definitions
- the present subject matter relates generally to linear compressors, and more particularly, to heat dissipation systems for linear compressors.
- Certain refrigerator appliances include sealed systems for cooling chilled chambers of the refrigerator appliance.
- the sealed systems generally include a compressor that generates compressed refrigerant during operation of the sealed system.
- the compressed refrigerant flows to an evaporator where heat exchange between the chilled chambers and the refrigerant cools the chilled chambers and food items located therein.
- Certain refrigerator appliances have included linear compressors for compressing refrigerant.
- Linear compressors generally include a piston and a driving coil. The driving coil generates a force for sliding the piston forward and backward within a chamber. During motion of the piston within the chamber, the piston compresses refrigerant.
- An oil or lubricant supply system is typically included within the compressor housing for lubricating the piston to reduce friction losses due to rubbing of the piston against the wall of the chamber, which can negatively affect an efficiency of an associated refrigerator appliance.
- linear compressors often suffer from performance issues when the oil temperature is high. For example, as oil is heated during operation of the compressor, oil may be atomized or may otherwise splash around which can cause mechanical losses in the springs or reliability issues related to oil droplet entrainment into the suction gas inlet.
- Certain linear compressors include external heat exchangers that pass hot oil outside of the housing, but these heat exchangers are complex, costly, and are prone to leaks.
- a linear compressor with features for improved performance would be desirable. More particularly, a linear compressor with an improved system for dissipating heat from oil would be particularly beneficial.
- a compressor defining an axial direction and a vertical direction.
- the compressor includes a housing defining a sump for collecting lubricant, a casing positioned within the housing for slidably receiving a piston, the casing defining a hot oil collection point, a pump for circulating the lubricant within the housing, the pump including a pump inlet positioned within the sump.
- a heat dissipation assembly includes a distribution conduit extending along an inner surface of the housing, the distribution conduit defining a fluid inlet fluidly coupled to the hot oil collection point for receiving the lubricant and a plurality of discharge ports defined within the distribution conduit for dripping the lubricant along the housing and back into the sump.
- a heat dissipation assembly for a compressor.
- the compressor includes a housing defining a sump for collecting lubricant, a casing positioned within the housing for slidably receiving a piston, the casing defining a hot oil collection point, and a pump for circulating the lubricant within the housing.
- the heat dissipation assembly includes a distribution conduit extending along an inner surface of the housing, the distribution conduit defining a fluid inlet fluidly coupled to the hot oil collection point for receiving the lubricant and a plurality of discharge ports defined within the distribution conduit for dripping the lubricant along the housing and back into the sump.
- FIG. 1 is a front elevation view of a refrigerator appliance according to an example embodiment of the present subject matter.
- FIG. 2 is schematic view of certain components of the example refrigerator appliance of FIG. 1 .
- FIG. 3 is a perspective, section view of a linear compressor according to an exemplary embodiment of the present subject matter.
- FIG. 4 is another perspective, section view of the exemplary linear compressor of FIG. 3 according to an exemplary embodiment of the present subject matter.
- FIG. 5 is a perspective view of a linear compressor with a compressor housing removed for clarity according to an example embodiment of the present subject matter.
- FIG. 6 is a section view of the exemplary linear compressor of FIG. 3 with a piston in an extended position according to an exemplary embodiment of the present subject matter.
- FIG. 7 is a section view of the exemplary linear compressor of FIG. 3 with the piston in a retracted position according to an exemplary embodiment of the present subject matter.
- FIG. 8 provides a schematic, cross sectional view of the exemplary linear compressor of FIG. 3 including a heat dissipation assembly according to an exemplary embodiment of the present subject matter.
- FIG. 9 provides a top view of the exemplary linear compressor of FIG. 3 including the exemplary heat dissipation assembly of FIG. 8 according to an exemplary embodiment of the present subject matter.
- FIG. 10 provides a schematic view of certain components of the exemplary heat dissipation assembly of FIG. 8 according to an exemplary embodiment of the present subject matter.
- FIG. 1 depicts a refrigerator appliance 10 that incorporates a sealed refrigeration system 60 ( FIG. 2 ).
- the term “refrigerator appliance” is used in a generic sense herein to encompass any manner of refrigeration appliance, such as a freezer, refrigerator/freezer combination, and any style or model of conventional refrigerator.
- the present subject matter is not limited to use in appliances.
- the present subject matter may be used for any other suitable purpose, such as vapor compression within air conditioning units or air compression within air compressors.
- the refrigerator appliance 10 is depicted as an upright refrigerator having a cabinet or casing 12 that defines a number of internal chilled storage compartments.
- refrigerator appliance 10 includes upper fresh-food compartments 14 having doors 16 and lower freezer compartment 18 having upper drawer 20 and lower drawer 22 .
- the drawers 20 and 22 are “pull-out” drawers in that they can be manually moved into and out of the freezer compartment 18 on suitable slide mechanisms.
- FIG. 2 is a schematic view of certain components of refrigerator appliance 10 , including a sealed refrigeration system 60 of refrigerator appliance 10 .
- a machinery compartment 62 contains components for executing a known vapor compression cycle for cooling air.
- the components include a compressor 64 , a condenser 66 , an expansion device 68 , and an evaporator 70 connected in series and charged with a refrigerant.
- refrigeration system 60 may include additional components, e.g., at least one additional evaporator, compressor, expansion device, and/or condenser.
- refrigeration system 60 may include two evaporators.
- refrigerant flows into compressor 64 , which operates to increase the pressure of the refrigerant. This compression of the refrigerant raises its temperature, which is lowered by passing the refrigerant through condenser 66 . Within condenser 66 , heat exchange with ambient air takes place so as to cool the refrigerant. A fan 72 is used to pull air across condenser 66 , as illustrated by arrows Ac, so as to provide forced convection for a more rapid and efficient heat exchange between the refrigerant within condenser 66 and the ambient air.
- increasing air flow across condenser 66 can, e.g., increase the efficiency of condenser 66 by improving cooling of the refrigerant contained therein.
- An expansion device 68 receives refrigerant from condenser 66 . From expansion device 68 , the refrigerant enters evaporator 70 . Upon exiting expansion device 68 and entering evaporator 70 , the refrigerant drops in pressure. Due to the pressure drop and/or phase change of the refrigerant, evaporator 70 is cool relative to compartments 14 and 18 of refrigerator appliance 10 . As such, cooled air is produced and refrigerates compartments 14 and 18 of refrigerator appliance 10 . Thus, evaporator 70 is a type of heat exchanger which transfers heat from air passing over evaporator 70 to refrigerant flowing through evaporator 70 .
- evaporator 70 is a type of heat exchanger which transfers heat from air passing over evaporator 70 to refrigerant flowing through evaporator 70 .
- vapor compression cycle components in a refrigeration circuit, associated fans, and associated compartments are sometimes referred to as a sealed refrigeration system operable to force cold air through compartments 14 , 18 ( FIG. 1 ).
- the refrigeration system 60 depicted in FIG. 2 is provided by way of example only. Thus, it is within the scope of the present subject matter for other configurations of the refrigeration system to be used as well.
- FIGS. 3 through 9 a linear compressor 100 will be described according to exemplary embodiments of the present subject matter.
- FIGS. 3 and 4 provide perspective, section views of linear compressor 100
- FIG. 5 provides a perspective view of linear compressor 100 with a compressor shell or housing 102 removed for clarity
- FIGS. 6 and 7 provide section views of linear compressor when a piston is in an extended and retracted position, respectively.
- linear compressor 100 is used herein only as an exemplary embodiment to facilitate the description of aspects of the present subject matter. Modifications and variations may be made to linear compressor 100 while remaining within the scope of the present subject matter.
- housing 102 may include a lower portion or lower housing 104 and an upper portion or upper housing 106 which are joined together to form a substantially enclosed cavity 108 for housing various components of linear compressor 100 .
- cavity 108 may be a hermetic or air-tight shell that can house working components of linear compressor 100 and may hinder or prevent refrigerant from leaking or escaping from refrigeration system 60 .
- linear compressor 100 generally defines an axial direction A, a radial direction R, and a circumferential direction C. It should be appreciated that linear compressor 100 is described and illustrated herein only to describe aspects of the present subject matter. Variations and modifications to linear compressor 100 may be made while remaining within the scope of the present subject matter.
- linear compressor 100 includes a casing 110 that extends between a first end portion 112 and a second end portion 114 , e.g., along the axial direction A.
- Casing 110 includes a cylinder 117 that defines a chamber 118 .
- Cylinder 117 is positioned at or adjacent first end portion 112 of casing 110 .
- Chamber 118 extends longitudinally along the axial direction A.
- linear compressor 100 is operable to increase a pressure of fluid within chamber 118 of linear compressor 100 .
- Linear compressor 100 may be used to compress any suitable fluid, such as refrigerant or air.
- linear compressor 100 may be used in a refrigerator appliance, such as refrigerator appliance 10 ( FIG. 1 ) in which linear compressor 100 may be used as compressor 64 ( FIG. 2 ).
- Linear compressor 100 includes a stator 120 of a motor that is mounted or secured to casing 110 .
- stator 120 generally includes an outer back iron 122 and a driving coil 124 that extend about the circumferential direction C within casing 110 .
- Linear compressor 100 also includes one or more valves that permit refrigerant to enter and exit chamber 118 during operation of linear compressor 100 .
- a discharge muffler 126 is positioned at an end of chamber 118 for regulating the flow of refrigerant out of chamber 118 , while a suction valve 128 (shown only in FIGS. 6-7 for clarity) regulates flow of refrigerant into chamber 118 .
- a piston 130 with a piston head 132 is slidably received within chamber 118 of cylinder 117 .
- piston 130 is slidable along the axial direction A.
- piston head 132 compresses refrigerant within chamber 118 .
- piston head 132 can slide within chamber 118 towards a bottom dead center position (see, e.g., FIG. 7 ) along the axial direction A, i.e., an expansion stroke of piston head 132 .
- linear compressor 100 may include an additional piston head and/or additional chambers at an opposite end of linear compressor 100 .
- linear compressor 100 may have multiple piston heads in alternative exemplary embodiments.
- linear compressor 100 also includes a mover 140 which is generally driven by stator 120 for compressing refrigerant.
- mover 140 may include an inner back iron 142 positioned in stator 120 of the motor.
- outer back iron 122 and/or driving coil 124 may extend about inner back iron 142 , e.g., along the circumferential direction C.
- Inner back iron 142 also has an outer surface that faces towards outer back iron 122 and/or driving coil 124 .
- At least one driving magnet 144 is mounted to inner back iron 142 , e.g., at the outer surface of inner back iron 142 .
- Driving magnet 144 may face and/or be exposed to driving coil 124 .
- driving magnet 144 may be spaced apart from driving coil 124 , e.g., along the radial direction R by an air gap.
- the air gap may be defined between opposing surfaces of driving magnet 144 and driving coil 124 .
- Driving magnet 144 may also be mounted or fixed to inner back iron 142 such that an outer surface of driving magnet 144 is substantially flush with the outer surface of inner back iron 142 .
- driving magnet 144 may be inset within inner back iron 142 .
- the magnetic field from driving coil 124 may have to pass through only a single air gap between outer back iron 122 and inner back iron 142 during operation of linear compressor 100 , and linear compressor 100 may be more efficient relative to linear compressors with air gaps on both sides of a driving magnet.
- driving coil 124 extends about inner back iron 142 , e.g., along the circumferential direction C.
- inner back iron 142 may extend around driving coil 124 along the circumferential direction C.
- Driving coil 124 is operable to move the inner back iron 142 along the axial direction A during operation of driving coil 124 .
- a current may be induced within driving coil 124 by a current source (not shown) to generate a magnetic field that engages driving magnet 144 and urges piston 130 to move along the axial direction A in order to compress refrigerant within chamber 118 as described above and will be understood by those skilled in the art.
- driving coil 124 may engage driving magnet 144 in order to move inner back iron 142 and piston head 132 along the axial direction A during operation of driving coil 124 .
- driving coil 124 may slide piston 130 between the top dead center position and the bottom dead center position, e.g., by moving inner back iron 142 along the axial direction A, during operation of driving coil 124 .
- Linear compressor 100 may include various components for permitting and/or regulating operation of linear compressor 100 .
- linear compressor 100 includes a controller (not shown) that is configured for regulating operation of linear compressor 100 .
- the controller is in, e.g., operative, communication with the motor, e.g., driving coil 124 of the motor.
- the controller may selectively activate driving coil 124 , e.g., by inducing current in driving coil 124 , in order to compress refrigerant with piston 130 as described above.
- the controller includes memory and one or more processing devices such as microprocessors, CPUs or the like, such as general or special purpose microprocessors operable to execute programming instructions or micro-control code associated with operation of linear compressor 100 .
- the memory can represent random access memory such as DRAM, or read only memory such as ROM or FLASH.
- the processor executes programming instructions stored in the memory.
- the memory can be a separate component from the processor or can be included onboard within the processor.
- the controller may be constructed without using a microprocessor, e.g., using a combination of discrete analog and/or digital logic circuitry (such as switches, amplifiers, integrators, comparators, flip-flops, AND gates, and the like) to perform control functionality instead of relying upon software.
- Inner back iron 142 further includes an outer cylinder 146 and an inner sleeve 148 .
- Outer cylinder 146 defines the outer surface of inner back iron 142 and also has an inner surface positioned opposite the outer surface of outer cylinder 146 .
- Inner sleeve 148 is positioned on or at inner surface of outer cylinder 146 .
- a first interference fit between outer cylinder 146 and inner sleeve 148 may couple or secure outer cylinder 146 and inner sleeve 148 together.
- inner sleeve 148 may be welded, glued, fastened, or connected via any other suitable mechanism or method to outer cylinder 146 .
- Outer cylinder 146 may be constructed of or with any suitable material.
- outer cylinder 146 may be constructed of or with a plurality of (e.g., ferromagnetic) laminations. The laminations are distributed along the circumferential direction C in order to form outer cylinder 146 and are mounted to one another or secured together, e.g., with rings pressed onto ends of the laminations.
- Outer cylinder 146 may define a recess that extends inwardly from the outer surface of outer cylinder 146 , e.g., along the radial direction R.
- Driving magnet 144 is positioned in the recess on outer cylinder 146 , e.g., such that driving magnet 144 is inset within outer cylinder 146 .
- Linear compressor 100 also includes a pair of planar springs 150 .
- Each planar spring 150 may be coupled to a respective end of inner back iron 142 , e.g., along the axial direction A.
- planar springs 150 support inner back iron 142 .
- inner back iron 142 is suspended by planar springs 150 within the stator or the motor of linear compressor 100 such that motion of inner back iron 142 along the radial direction R is hindered or limited while motion along the axial direction A is relatively unimpeded.
- planar springs 150 may be substantially stiffer along the radial direction R than along the axial direction A.
- planar springs 150 can assist with maintaining a uniformity of the air gap between driving magnet 144 and driving coil 124 , e.g., along the radial direction R, during operation of the motor and movement of inner back iron 142 on the axial direction A. Planar springs 150 can also assist with hindering side pull forces of the motor from transmitting to piston 130 and being reacted in cylinder 117 as a friction loss.
- a flex mount 160 is mounted to and extends through inner back iron 142 .
- flex mount 160 is mounted to inner back iron 142 via inner sleeve 148 .
- flex mount 160 may be coupled (e.g., threaded) to inner sleeve 148 at the middle portion of inner sleeve 148 and/or flex mount 160 in order to mount or fix flex mount 160 to inner sleeve 148 .
- Flex mount 160 may assist with forming a coupling 162 .
- Coupling 162 connects inner back iron 142 and piston 130 such that motion of inner back iron 142 , e.g., along the axial direction A, is transferred to piston 130 .
- Coupling 162 may be a compliant coupling that is compliant or flexible along the radial direction R.
- coupling 162 may be sufficiently compliant along the radial direction R such that little or no motion of inner back iron 142 along the radial direction R is transferred to piston 130 by coupling 162 . In such a manner, side pull forces of the motor are decoupled from piston 130 and/or cylinder 117 and friction between piston 130 and cylinder 117 may be reduced.
- piston head 132 of piston 130 has a piston cylindrical side wall 170 .
- Cylindrical side wall 170 may extend along the axial direction A from piston head 132 towards inner back iron 142 .
- An outer surface of cylindrical side wall 170 may slide on cylinder 117 at chamber 118 and an inner surface of cylindrical side wall 170 may be positioned opposite the outer surface of cylindrical side wall 170 .
- the outer surface of cylindrical side wall 170 may face away from a center of cylindrical side wall 170 along the radial direction R, and the inner surface of cylindrical side wall 170 may face towards the center of cylindrical side wall 170 along the radial direction R.
- Flex mount 160 extends between a first end portion 172 and a second end portion 174 , e.g., along the axial direction A.
- the inner surface of cylindrical side wall 170 defines a ball seat 176 proximate first end portion.
- coupling 162 also includes a ball nose 178 .
- ball nose 178 is positioned at first end portion 172 of flex mount 160 , and ball nose 178 may contact flex mount 160 at first end portion 172 of flex mount 160 .
- ball nose 178 may contact piston 130 at ball seat 176 of piston 130 .
- ball nose 178 may rest on ball seat 176 of piston 130 such that ball nose 178 is slidable and/or rotatable on ball seat 176 of piston 130 .
- ball nose 178 may have a frusto-spherical surface positioned against ball seat 176 of piston 130 , and ball seat 176 may be shaped complementary to the frusto-spherical surface of ball nose 178 .
- the frusto-spherical surface of ball nose 178 may slide and/or rotate on ball seat 176 of piston 130 .
- Relative motion between flex mount 160 and piston 130 at the interface between ball nose 178 and ball seat 176 of piston 130 may provide reduced friction between piston 130 and cylinder 117 , e.g., compared to a fixed connection between flex mount 160 and piston 130 .
- the frusto-spherical surface of ball nose 178 may slide on ball seat 176 of piston 130 to reduce friction between piston 130 and cylinder 117 relative to a rigid connection between inner back iron 142 and piston 130 .
- Flex mount 160 is connected to inner back iron 142 away from first end portion 172 of flex mount 160 .
- flex mount 160 may be connected to inner back iron 142 at second end portion 174 of flex mount 160 or between first and second end portions 172 , 174 of flex mount 160 .
- flex mount 160 is positioned at or within piston 130 at first end portion 172 of flex mount 160 , as discussed in greater detail below.
- flex mount 160 includes a tubular wall 190 between inner back iron 142 and piston 130 .
- a channel 192 within tubular wall 190 is configured for directing compressible fluid, such as refrigerant or air, though flex mount 160 towards piston head 132 and/or into piston 130 .
- Inner back iron 142 may be mounted to flex mount 160 such that inner back iron 142 extends around tubular wall 190 , e.g., at the middle portion of flex mount 160 between first and second end portions 172 , 174 of flex mount 160 .
- Channel 192 may extend between first and second end portions 172 , 174 of flex mount 160 within tubular wall 190 such that the compressible fluid is flowable from first end portion 172 of flex mount 160 to second end portion 174 of flex mount 160 through channel 192 . In such a manner, compressible fluid may flow through inner back iron 142 within flex mount 160 during operation of linear compressor 100 .
- a muffler 194 may be positioned within channel 192 within tubular wall 190 , e.g., to reduce the noise of compressible fluid flowing through channel 192 .
- Piston head 132 also defines at least one opening 196 . Opening 196 of piston head 132 extends, e.g., along the axial direction A, through piston head 132 . Thus, the flow of fluid may pass through piston head 132 via opening 196 of piston head 132 into chamber 118 during operation of linear compressor 100 . In such a manner, the flow of fluid (that is compressed by piston head 132 within chamber 118 ) may flow within channel 192 through flex mount 160 and inner back iron 142 to piston 130 during operation of linear compressor 100 . As explained above, suction valve 128 ( FIGS. 6-7 ) may be positioned on piston head 132 to regulate the flow of compressible fluid through opening 196 into chamber 118 .
- a lubrication system 200 which may be used with linear compressor 100 .
- lubrication system 200 is configured for circulating a lubricant, e.g., such as oil, through the working or moving components of linear compressor 100 to reduce friction, improve efficiency, etc.
- a lubricant e.g., such as oil
- housing 102 generally defines a sump 202 which is configured for collecting oil (e.g., as identified herein by reference numeral 204 , see FIG. 8 ).
- sump 202 is defined in the bottom portion of lower housing 104 .
- Lubrication system 200 further includes a pump 206 for continuously circulating oil 204 through components of linear compressor 100 which need lubrication.
- pump 206 may include a pump inlet 208 positioned proximate bottom of housing 102 within sump 202 .
- Pump 206 may draw in oil 204 from sump 202 through pump inlet 208 before circulating it throughout linear compressor 100 , e.g., via a supply conduit 210 ( FIG. 7 ).
- supply conduit 210 FIG. 7
- lubrication system 200 may include any suitable number of supply conduits, nozzles, and other distribution features in order to provide oil 204 to various components throughout linear compressor 100 .
- pump inlet 208 is positioned very near and faces the bottom of lower housing 104 .
- pump 206 may readily draw in oil 204 even when oil levels are low.
- linear compressor 100 may be configured for receiving oil 204 not to exceed a max oil fill line 212 .
- the max oil fill line 212 is identified in FIG. 8 , and may for example extend less than half the way up lower housing 104 , less than a quarter of the way up lower housing 104 , or lower.
- pump 206 may circulate oil 204 throughout linear compressor 100 before being recirculated, as will be described in further detail below.
- lubrication system 200 may include various features for treating, filtering, or conditioning oil 204 during recirculation, such as various filters, screens, etc.
- pump 206 is illustrated as being positioned within sump 202 , it could be positioned at any other location and may include a fluid passage that draws oil 204 from sump 202 .
- linear compressor 100 may include a suction inlet 220 for receiving a flow of refrigerant.
- suction inlet 220 may be defined on housing 102 (e.g., such as on lower housing 104 ), and may be configured for receiving a refrigerant supply conduit to provide refrigerant to cavity 108 .
- flex mount 160 includes tubular wall 190 , which defines channel 192 for directing compressible fluid, such as refrigerant gas, through flex mount 160 towards piston head 132 .
- desirable flow path of refrigerant gas is through suction inlet 220 , through channel 192 , through opening 196 , and into chamber 118 .
- Suction valve 128 may block opening 196 during a compression stroke and a discharge valve 116 may permit the compressed gas to exit chamber 118 when the desired pressure is reached.
- Flex mount 160 may further define a channel inlet 222 which is positioned proximate a second end portion 174 of flex mount 160 for drawing gas and from suction inlet 220 or cavity 108 into channel 192 .
- channel inlet 222 may be an opening on flex mount 160 which extends substantially within a horizontal plane (same vertical position) and opens toward suction inlet 220 .
- channel inlet 222 and suction inlet 220 may be positioned substantially within the same horizontal plane.
- suction inlet 220 and channel inlet 222 are also positioned proximate a midpoint of housing 102 along a vertical direction V.
- suction inlet 220 and channel inlet 222 may be positioned at any other suitable locations within housing 102 .
- linear compressor 100 may further include features for expelling or dissipating heat that has built up in the oil or lubricant or elsewhere within linear compressor 100 .
- linear compressor 100 includes a heat dissipation assembly 230 that is positioned within cavity 108 and helps facilitate the discharge of thermal energy from within cavity 108 to outside of housing 102 .
- a heat dissipation assembly 230 is described herein, it should be appreciated that variations and modifications to heat dissipation assembly 230 may be used while remaining within the scope of the present subject matter.
- heat dissipation assembly 230 will be described below as being used with lubrication system 200 of linear compressor 100 . However, it should be appreciated that aspects of heat dissipation assembly 230 may be used in other compressors and in other lubrication systems while remaining within the scope of the present subject matter.
- heat dissipation assembly 230 discharges or expels heat from lubricant 204 that is absorbed during operation of linear compressor 100 .
- hot lubricant 204 may be transferred directly from the moving components of linear compressor 100 to a hot oil collection point 232 .
- heat dissipation assembly 230 may have any suitable mechanism, tubing, or other features for collecting lubricant 204 and discharging it through hot oil collection point 232 so that it may be cooled by heat dissipation assembly 230 , returned to sump 202 , and recirculated.
- hot oil collection point 232 may be defined on casing 110 for passing heated lubricant 204 from casing 110 .
- heat dissipation assembly 230 includes a distribution conduit 240 that extends along an inner surface 242 of housing 102 .
- Distribution conduit 240 defines a fluid inlet 244 that is fluidly coupled to hot oil collection point 232 on casing 110 .
- Distribution conduit may further define a plurality of discharge ports 246 that are configured for spraying, dripping, or otherwise depositing the flow of lubricant 204 along the housing 102 so that it may re-collect in sump 202 before being recirculated by pump 206 . In this manner, oil 204 is urged through the working components of linear compressor 100 to minimize friction and improve operating efficiency, absorbing heat during the process.
- the heated oil 204 and then exits casing 110 through hot oil collection point 232 where it is distributed around housing 102 within distribution conduit 240 .
- the heated oil 204 is then sprayed onto housing 102 which has a lower temperature than the heated oil 204 .
- thermal energy may be transferred from the oil 204 to housing 102 where it may be expelled into the ambient environment. In this manner, oil 204 may be recirculated at a cooler temperature, thereby improving performance and lifetime of linear compressor 100 .
- distribution conduit 240 may be fluidly coupled in any manner or by any mechanism to any point or points on casing 110 for receiving heated oil 204 .
- heat dissipation assembly 230 includes a supply tube 250 that extends between and provides fluid communication between hot oil collection point 232 and fluid inlet 244 of distribution conduit 240 .
- supply tube 250 may be a flexible conduit that is routed from hot oil collection point 232 to distribution conduit 240 .
- distribution conduit 240 may be directly coupled to casing, e.g., via hot oil collection point 232 or through any other outlet of casing 110 .
- Distribution conduit 240 may generally have any suitable size, position, and configuration for distributing oil 204 as needed to facilitate operation of heat dissipation assembly 230 and cooling of linear compressor 100 .
- distribution conduit 240 extends around the entire circumference of housing 102 within a single horizontal plane. More specifically, according to the illustrated embodiment, distribution conduit 240 is a circular conduit that is mounted directly to lower housing 104 via mounting brackets 252 . In general, mounting brackets 252 are configured for reducing the transfer of vibrations from distribution conduit 240 onto housing 102 .
- distribution conduit 240 is illustrated as being mounted directly to lower housing 104 , it should be appreciated that according to alternative embodiments any other suitable mounting location and mechanism may be used.
- distribution conduit 240 may be mounted directly to casing 110 , such that distribution conduit 240 simply suspended near housing 102 .
- distribution conduit 240 may mounted within upper housing 106 such that heated oil 204 is discharged along a larger surface area of housing 102 before it is collected within sump 202 .
- distribution conduit 240 is illustrated as a circular conduit extending in a single horizontal plane, it should be appreciated that distribution conduit may have any other suitable cross sectional shape and may be routed through housing in any other suitable pattern or position, e.g., in a serpentine manner, zig-zagged, etc. Other configurations are possible and within the scope of the present subject matter
- distribution conduit 240 may be formed from any material which is sufficiently rigid to maintain a fluid passageway and contain a flow of lubricant 204 therein.
- distribution conduit 240 is a small conduit formed from metal.
- distribution conduit 240 may be formed by injection molding, e.g., using a suitable plastic material, such as injection molding grade Polybutylene Terephthalate (PBT), Nylon 6, high impact polystyrene (HIPS), Perfluoroalkoxy (PFA), Flourinated ethylene propylene (FEP), or acrylonitrile butadiene styrene (ABS).
- PBT Polybutylene Terephthalate
- HIPS high impact polystyrene
- PFA Perfluoroalkoxy
- FEP Flourinated ethylene propylene
- ABS acrylonitrile butadiene styrene
- these components may be extruded (tubing), compression molded, e.g., using sheet molding compound (SMC) thermoset plastic or other thermoplastics.
- distribution conduit 240 may be formed from any other suitable rigid material.
- discharge ports 246 are simple apertures 260 that are drilled, machined, punched, or otherwise formed within distribution conduit 240 .
- each discharge port 246 may include a discharge nozzle mounted over the aperture 260 for selectively controlling the flow rate and direction of the flow of oil 204 .
- discharge ports 246 e.g., apertures 260
- discharge ports 246 are defined on a bottom side 262 of distribution conduit 240 .
- discharge ports 246 may be defined on the sides, the top, or any other suitable location along distribution conduit 240 .
- discharge port 246 may be angled downward along the vertical direction and away from a vertical centerline of linear compressor 100 .
- discharge ports 246 may be positioned and oriented in any other suitable manner for directing oil 204 onto inner surface 242 of housing 102 .
- flow restricting member 270 may be a woven fabric or screen mesh 274 that is positioned over the plurality of discharge ports 246 for restricting flow therethrough. It should be appreciated that any suitable flow restricting member 270 may be used according to alternative embodiments.
- cross members or mesh screens may be formed within apertures 260 during the manufacturing process or may be overmolded onto distribution conduit 240 conduit after it is constructed.
- the heat dissipation assembly 230 described above may be used to cool the operation of a linear compressor, such as linear compressor 100 , or any other compressor.
- heat dissipation assembly 230 may use a mechanism for spraying oil onto the walls of the compressor housing for achieving improved thermal discharge and compressor efficiency.
- the heat dissipation assembly 230 uses the spray mechanism (e.g., distribution conduit 240 ) to spray oil onto an inside surface of the shell evenly and in a controlled manner, such that the shell then conducts the heat to the outer skin wall. The slow flow of oil inside the wall allows the oil to cool.
- Distribution conduit 240 operates by receiving hot oil that leaves the cylinder under force of pump 206 .
- the distribution conduit 240 is provided with multiple holes (e.g., discharge ports 246 ), and oil is forced out through multiple holes along the bottom-outer periphery.
- the oil runs down the wall around the entire lower shell inner wall section (losing heat to the wall).
- the slow flowing oil dribbles down the wall allow cooling of the oil before it reaches the sump.
- the oil is maintained in liquid form and gives up minimal heat to the suction gas inside the shell.
- the flow of the oil may be slowed by using a porous or flow restrictive surface (e.g., flow restricting member 270 ) as the oil comes out of holes in the tubing.
Abstract
Description
- The present subject matter relates generally to linear compressors, and more particularly, to heat dissipation systems for linear compressors.
- Certain refrigerator appliances include sealed systems for cooling chilled chambers of the refrigerator appliance. The sealed systems generally include a compressor that generates compressed refrigerant during operation of the sealed system. The compressed refrigerant flows to an evaporator where heat exchange between the chilled chambers and the refrigerant cools the chilled chambers and food items located therein. Recently, certain refrigerator appliances have included linear compressors for compressing refrigerant. Linear compressors generally include a piston and a driving coil. The driving coil generates a force for sliding the piston forward and backward within a chamber. During motion of the piston within the chamber, the piston compresses refrigerant.
- An oil or lubricant supply system is typically included within the compressor housing for lubricating the piston to reduce friction losses due to rubbing of the piston against the wall of the chamber, which can negatively affect an efficiency of an associated refrigerator appliance. However, such linear compressors often suffer from performance issues when the oil temperature is high. For example, as oil is heated during operation of the compressor, oil may be atomized or may otherwise splash around which can cause mechanical losses in the springs or reliability issues related to oil droplet entrainment into the suction gas inlet. Certain linear compressors include external heat exchangers that pass hot oil outside of the housing, but these heat exchangers are complex, costly, and are prone to leaks.
- Accordingly, a linear compressor with features for improved performance would be desirable. More particularly, a linear compressor with an improved system for dissipating heat from oil would be particularly beneficial.
- Aspects and advantages of the invention will be set forth in part in the following description, or may be apparent from the description, or may be learned through practice of the invention.
- In one exemplary embodiment, a compressor defining an axial direction and a vertical direction is provided. The compressor includes a housing defining a sump for collecting lubricant, a casing positioned within the housing for slidably receiving a piston, the casing defining a hot oil collection point, a pump for circulating the lubricant within the housing, the pump including a pump inlet positioned within the sump. A heat dissipation assembly includes a distribution conduit extending along an inner surface of the housing, the distribution conduit defining a fluid inlet fluidly coupled to the hot oil collection point for receiving the lubricant and a plurality of discharge ports defined within the distribution conduit for dripping the lubricant along the housing and back into the sump.
- In another exemplary embodiment, a heat dissipation assembly for a compressor is provided. The compressor includes a housing defining a sump for collecting lubricant, a casing positioned within the housing for slidably receiving a piston, the casing defining a hot oil collection point, and a pump for circulating the lubricant within the housing. The heat dissipation assembly includes a distribution conduit extending along an inner surface of the housing, the distribution conduit defining a fluid inlet fluidly coupled to the hot oil collection point for receiving the lubricant and a plurality of discharge ports defined within the distribution conduit for dripping the lubricant along the housing and back into the sump.
- These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
- A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures.
-
FIG. 1 is a front elevation view of a refrigerator appliance according to an example embodiment of the present subject matter. -
FIG. 2 is schematic view of certain components of the example refrigerator appliance ofFIG. 1 . -
FIG. 3 is a perspective, section view of a linear compressor according to an exemplary embodiment of the present subject matter. -
FIG. 4 is another perspective, section view of the exemplary linear compressor ofFIG. 3 according to an exemplary embodiment of the present subject matter. -
FIG. 5 is a perspective view of a linear compressor with a compressor housing removed for clarity according to an example embodiment of the present subject matter. -
FIG. 6 is a section view of the exemplary linear compressor ofFIG. 3 with a piston in an extended position according to an exemplary embodiment of the present subject matter. -
FIG. 7 is a section view of the exemplary linear compressor ofFIG. 3 with the piston in a retracted position according to an exemplary embodiment of the present subject matter. -
FIG. 8 provides a schematic, cross sectional view of the exemplary linear compressor ofFIG. 3 including a heat dissipation assembly according to an exemplary embodiment of the present subject matter. -
FIG. 9 provides a top view of the exemplary linear compressor ofFIG. 3 including the exemplary heat dissipation assembly ofFIG. 8 according to an exemplary embodiment of the present subject matter. -
FIG. 10 provides a schematic view of certain components of the exemplary heat dissipation assembly ofFIG. 8 according to an exemplary embodiment of the present subject matter. - Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present invention.
- Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
-
FIG. 1 depicts arefrigerator appliance 10 that incorporates a sealed refrigeration system 60 (FIG. 2 ). It should be appreciated that the term “refrigerator appliance” is used in a generic sense herein to encompass any manner of refrigeration appliance, such as a freezer, refrigerator/freezer combination, and any style or model of conventional refrigerator. In addition, it should be understood that the present subject matter is not limited to use in appliances. Thus, the present subject matter may be used for any other suitable purpose, such as vapor compression within air conditioning units or air compression within air compressors. - In the illustrated example embodiment shown in
FIG. 1 , therefrigerator appliance 10 is depicted as an upright refrigerator having a cabinet orcasing 12 that defines a number of internal chilled storage compartments. In particular,refrigerator appliance 10 includes upper fresh-food compartments 14 havingdoors 16 andlower freezer compartment 18 havingupper drawer 20 andlower drawer 22. Thedrawers freezer compartment 18 on suitable slide mechanisms. -
FIG. 2 is a schematic view of certain components ofrefrigerator appliance 10, including a sealedrefrigeration system 60 ofrefrigerator appliance 10. Amachinery compartment 62 contains components for executing a known vapor compression cycle for cooling air. The components include acompressor 64, acondenser 66, anexpansion device 68, and anevaporator 70 connected in series and charged with a refrigerant. As will be understood by those skilled in the art,refrigeration system 60 may include additional components, e.g., at least one additional evaporator, compressor, expansion device, and/or condenser. As an example,refrigeration system 60 may include two evaporators. - Within
refrigeration system 60, refrigerant flows intocompressor 64, which operates to increase the pressure of the refrigerant. This compression of the refrigerant raises its temperature, which is lowered by passing the refrigerant throughcondenser 66. Withincondenser 66, heat exchange with ambient air takes place so as to cool the refrigerant. Afan 72 is used to pull air acrosscondenser 66, as illustrated by arrows Ac, so as to provide forced convection for a more rapid and efficient heat exchange between the refrigerant withincondenser 66 and the ambient air. Thus, as will be understood by those skilled in the art, increasing air flow acrosscondenser 66 can, e.g., increase the efficiency ofcondenser 66 by improving cooling of the refrigerant contained therein. - An expansion device 68 (e.g., a valve, capillary tube, or other restriction device) receives refrigerant from
condenser 66. Fromexpansion device 68, the refrigerant entersevaporator 70. Upon exitingexpansion device 68 and enteringevaporator 70, the refrigerant drops in pressure. Due to the pressure drop and/or phase change of the refrigerant,evaporator 70 is cool relative tocompartments refrigerator appliance 10. As such, cooled air is produced and refrigeratescompartments refrigerator appliance 10. Thus,evaporator 70 is a type of heat exchanger which transfers heat from air passing overevaporator 70 to refrigerant flowing throughevaporator 70. - Collectively, the vapor compression cycle components in a refrigeration circuit, associated fans, and associated compartments are sometimes referred to as a sealed refrigeration system operable to force cold air through
compartments 14, 18 (FIG. 1 ). Therefrigeration system 60 depicted inFIG. 2 is provided by way of example only. Thus, it is within the scope of the present subject matter for other configurations of the refrigeration system to be used as well. - Referring now generally to
FIGS. 3 through 9 , alinear compressor 100 will be described according to exemplary embodiments of the present subject matter. Specifically,FIGS. 3 and 4 provide perspective, section views oflinear compressor 100,FIG. 5 provides a perspective view oflinear compressor 100 with a compressor shell orhousing 102 removed for clarity, andFIGS. 6 and 7 provide section views of linear compressor when a piston is in an extended and retracted position, respectively. It should be appreciated thatlinear compressor 100 is used herein only as an exemplary embodiment to facilitate the description of aspects of the present subject matter. Modifications and variations may be made tolinear compressor 100 while remaining within the scope of the present subject matter. - As illustrated for example in
FIGS. 3 and 4 ,housing 102 may include a lower portion orlower housing 104 and an upper portion orupper housing 106 which are joined together to form a substantiallyenclosed cavity 108 for housing various components oflinear compressor 100. Specifically, for example,cavity 108 may be a hermetic or air-tight shell that can house working components oflinear compressor 100 and may hinder or prevent refrigerant from leaking or escaping fromrefrigeration system 60. In addition,linear compressor 100 generally defines an axial direction A, a radial direction R, and a circumferential direction C. It should be appreciated thatlinear compressor 100 is described and illustrated herein only to describe aspects of the present subject matter. Variations and modifications tolinear compressor 100 may be made while remaining within the scope of the present subject matter. - Referring now generally to
FIGS. 3 through 9 , various parts and working components oflinear compressor 100 will be described according to an exemplary embodiment. As shown,linear compressor 100 includes acasing 110 that extends between afirst end portion 112 and asecond end portion 114, e.g., along the axialdirection A. Casing 110 includes acylinder 117 that defines achamber 118.Cylinder 117 is positioned at or adjacentfirst end portion 112 ofcasing 110.Chamber 118 extends longitudinally along the axial direction A. As discussed in greater detail below,linear compressor 100 is operable to increase a pressure of fluid withinchamber 118 oflinear compressor 100.Linear compressor 100 may be used to compress any suitable fluid, such as refrigerant or air. In particular,linear compressor 100 may be used in a refrigerator appliance, such as refrigerator appliance 10 (FIG. 1 ) in whichlinear compressor 100 may be used as compressor 64 (FIG. 2 ). -
Linear compressor 100 includes astator 120 of a motor that is mounted or secured tocasing 110. For example,stator 120 generally includes anouter back iron 122 and a drivingcoil 124 that extend about the circumferential direction C withincasing 110.Linear compressor 100 also includes one or more valves that permit refrigerant to enter andexit chamber 118 during operation oflinear compressor 100. For example, adischarge muffler 126 is positioned at an end ofchamber 118 for regulating the flow of refrigerant out ofchamber 118, while a suction valve 128 (shown only inFIGS. 6-7 for clarity) regulates flow of refrigerant intochamber 118. - A
piston 130 with apiston head 132 is slidably received withinchamber 118 ofcylinder 117. In particular,piston 130 is slidable along the axial direction A. During sliding ofpiston head 132 withinchamber 118,piston head 132 compresses refrigerant withinchamber 118. As an example, from a top dead center position (see, e.g.,FIG. 6 ),piston head 132 can slide withinchamber 118 towards a bottom dead center position (see, e.g.,FIG. 7 ) along the axial direction A, i.e., an expansion stroke ofpiston head 132. Whenpiston head 132 reaches the bottom dead center position,piston head 132 changes directions and slides inchamber 118 back towards the top dead center position, i.e., a compression stroke ofpiston head 132. It should be understood thatlinear compressor 100 may include an additional piston head and/or additional chambers at an opposite end oflinear compressor 100. Thus,linear compressor 100 may have multiple piston heads in alternative exemplary embodiments. - As illustrated,
linear compressor 100 also includes amover 140 which is generally driven bystator 120 for compressing refrigerant. Specifically, for example,mover 140 may include aninner back iron 142 positioned instator 120 of the motor. In particular,outer back iron 122 and/or drivingcoil 124 may extend aboutinner back iron 142, e.g., along the circumferential direction C. Inner backiron 142 also has an outer surface that faces towardsouter back iron 122 and/or drivingcoil 124. At least onedriving magnet 144 is mounted toinner back iron 142, e.g., at the outer surface ofinner back iron 142. - Driving
magnet 144 may face and/or be exposed to drivingcoil 124. In particular, drivingmagnet 144 may be spaced apart from drivingcoil 124, e.g., along the radial direction R by an air gap. Thus, the air gap may be defined between opposing surfaces of drivingmagnet 144 and drivingcoil 124. Drivingmagnet 144 may also be mounted or fixed toinner back iron 142 such that an outer surface of drivingmagnet 144 is substantially flush with the outer surface ofinner back iron 142. Thus, drivingmagnet 144 may be inset withininner back iron 142. In such a manner, the magnetic field from drivingcoil 124 may have to pass through only a single air gap between outerback iron 122 andinner back iron 142 during operation oflinear compressor 100, andlinear compressor 100 may be more efficient relative to linear compressors with air gaps on both sides of a driving magnet. - As may be seen in
FIG. 3 , drivingcoil 124 extends aboutinner back iron 142, e.g., along the circumferential direction C. In alternative example embodiments,inner back iron 142 may extend around drivingcoil 124 along the circumferential directionC. Driving coil 124 is operable to move theinner back iron 142 along the axial direction A during operation of drivingcoil 124. As an example, a current may be induced within drivingcoil 124 by a current source (not shown) to generate a magnetic field that engages drivingmagnet 144 and urgespiston 130 to move along the axial direction A in order to compress refrigerant withinchamber 118 as described above and will be understood by those skilled in the art. In particular, the magnetic field of drivingcoil 124 may engage drivingmagnet 144 in order to moveinner back iron 142 andpiston head 132 along the axial direction A during operation of drivingcoil 124. Thus, drivingcoil 124 may slidepiston 130 between the top dead center position and the bottom dead center position, e.g., by movinginner back iron 142 along the axial direction A, during operation of drivingcoil 124. -
Linear compressor 100 may include various components for permitting and/or regulating operation oflinear compressor 100. In particular,linear compressor 100 includes a controller (not shown) that is configured for regulating operation oflinear compressor 100. The controller is in, e.g., operative, communication with the motor, e.g., drivingcoil 124 of the motor. Thus, the controller may selectively activate drivingcoil 124, e.g., by inducing current in drivingcoil 124, in order to compress refrigerant withpiston 130 as described above. - The controller includes memory and one or more processing devices such as microprocessors, CPUs or the like, such as general or special purpose microprocessors operable to execute programming instructions or micro-control code associated with operation of
linear compressor 100. The memory can represent random access memory such as DRAM, or read only memory such as ROM or FLASH. The processor executes programming instructions stored in the memory. The memory can be a separate component from the processor or can be included onboard within the processor. Alternatively, the controller may be constructed without using a microprocessor, e.g., using a combination of discrete analog and/or digital logic circuitry (such as switches, amplifiers, integrators, comparators, flip-flops, AND gates, and the like) to perform control functionality instead of relying upon software. - Inner
back iron 142 further includes anouter cylinder 146 and aninner sleeve 148.Outer cylinder 146 defines the outer surface ofinner back iron 142 and also has an inner surface positioned opposite the outer surface ofouter cylinder 146.Inner sleeve 148 is positioned on or at inner surface ofouter cylinder 146. A first interference fit betweenouter cylinder 146 andinner sleeve 148 may couple or secureouter cylinder 146 andinner sleeve 148 together. In alternative exemplary embodiments,inner sleeve 148 may be welded, glued, fastened, or connected via any other suitable mechanism or method toouter cylinder 146. -
Outer cylinder 146 may be constructed of or with any suitable material. For example,outer cylinder 146 may be constructed of or with a plurality of (e.g., ferromagnetic) laminations. The laminations are distributed along the circumferential direction C in order to formouter cylinder 146 and are mounted to one another or secured together, e.g., with rings pressed onto ends of the laminations.Outer cylinder 146 may define a recess that extends inwardly from the outer surface ofouter cylinder 146, e.g., along the radial directionR. Driving magnet 144 is positioned in the recess onouter cylinder 146, e.g., such that drivingmagnet 144 is inset withinouter cylinder 146. -
Linear compressor 100 also includes a pair of planar springs 150. Eachplanar spring 150 may be coupled to a respective end ofinner back iron 142, e.g., along the axial direction A. During operation of drivingcoil 124,planar springs 150 supportinner back iron 142. In particular,inner back iron 142 is suspended byplanar springs 150 within the stator or the motor oflinear compressor 100 such that motion ofinner back iron 142 along the radial direction R is hindered or limited while motion along the axial direction A is relatively unimpeded. Thus,planar springs 150 may be substantially stiffer along the radial direction R than along the axial direction A. In such a manner,planar springs 150 can assist with maintaining a uniformity of the air gap between drivingmagnet 144 and drivingcoil 124, e.g., along the radial direction R, during operation of the motor and movement ofinner back iron 142 on the axial direction A. Planar springs 150 can also assist with hindering side pull forces of the motor from transmitting topiston 130 and being reacted incylinder 117 as a friction loss. - A
flex mount 160 is mounted to and extends throughinner back iron 142. In particular,flex mount 160 is mounted toinner back iron 142 viainner sleeve 148. Thus,flex mount 160 may be coupled (e.g., threaded) toinner sleeve 148 at the middle portion ofinner sleeve 148 and/or flexmount 160 in order to mount or fixflex mount 160 toinner sleeve 148.Flex mount 160 may assist with forming acoupling 162. Coupling 162 connectsinner back iron 142 andpiston 130 such that motion ofinner back iron 142, e.g., along the axial direction A, is transferred topiston 130. - Coupling 162 may be a compliant coupling that is compliant or flexible along the radial direction R. In particular, coupling 162 may be sufficiently compliant along the radial direction R such that little or no motion of
inner back iron 142 along the radial direction R is transferred topiston 130 bycoupling 162. In such a manner, side pull forces of the motor are decoupled frompiston 130 and/orcylinder 117 and friction betweenpiston 130 andcylinder 117 may be reduced. - As may be seen in the figures,
piston head 132 ofpiston 130 has a pistoncylindrical side wall 170.Cylindrical side wall 170 may extend along the axial direction A frompiston head 132 towardsinner back iron 142. An outer surface ofcylindrical side wall 170 may slide oncylinder 117 atchamber 118 and an inner surface ofcylindrical side wall 170 may be positioned opposite the outer surface ofcylindrical side wall 170. Thus, the outer surface ofcylindrical side wall 170 may face away from a center ofcylindrical side wall 170 along the radial direction R, and the inner surface ofcylindrical side wall 170 may face towards the center ofcylindrical side wall 170 along the radial direction R. -
Flex mount 160 extends between afirst end portion 172 and asecond end portion 174, e.g., along the axial direction A. According to an exemplary embodiment, the inner surface ofcylindrical side wall 170 defines aball seat 176 proximate first end portion. In addition, coupling 162 also includes aball nose 178. Specifically, for example,ball nose 178 is positioned atfirst end portion 172 offlex mount 160, andball nose 178 may contactflex mount 160 atfirst end portion 172 offlex mount 160. In addition,ball nose 178 may contactpiston 130 atball seat 176 ofpiston 130. In particular,ball nose 178 may rest onball seat 176 ofpiston 130 such thatball nose 178 is slidable and/or rotatable onball seat 176 ofpiston 130. For example,ball nose 178 may have a frusto-spherical surface positioned againstball seat 176 ofpiston 130, andball seat 176 may be shaped complementary to the frusto-spherical surface ofball nose 178. The frusto-spherical surface ofball nose 178 may slide and/or rotate onball seat 176 ofpiston 130. - Relative motion between
flex mount 160 andpiston 130 at the interface betweenball nose 178 andball seat 176 ofpiston 130 may provide reduced friction betweenpiston 130 andcylinder 117, e.g., compared to a fixed connection betweenflex mount 160 andpiston 130. For example, when an axis on whichpiston 130 slides withincylinder 117 is angled relative to the axis on whichinner back iron 142 reciprocates, the frusto-spherical surface ofball nose 178 may slide onball seat 176 ofpiston 130 to reduce friction betweenpiston 130 andcylinder 117 relative to a rigid connection between innerback iron 142 andpiston 130. -
Flex mount 160 is connected toinner back iron 142 away fromfirst end portion 172 offlex mount 160. For example,flex mount 160 may be connected toinner back iron 142 atsecond end portion 174 offlex mount 160 or between first andsecond end portions flex mount 160. Conversely,flex mount 160 is positioned at or withinpiston 130 atfirst end portion 172 offlex mount 160, as discussed in greater detail below. - In addition,
flex mount 160 includes atubular wall 190 between innerback iron 142 andpiston 130. Achannel 192 withintubular wall 190 is configured for directing compressible fluid, such as refrigerant or air, thoughflex mount 160 towardspiston head 132 and/or intopiston 130. Innerback iron 142 may be mounted to flexmount 160 such thatinner back iron 142 extends aroundtubular wall 190, e.g., at the middle portion offlex mount 160 between first andsecond end portions flex mount 160.Channel 192 may extend between first andsecond end portions flex mount 160 withintubular wall 190 such that the compressible fluid is flowable fromfirst end portion 172 offlex mount 160 tosecond end portion 174 offlex mount 160 throughchannel 192. In such a manner, compressible fluid may flow throughinner back iron 142 withinflex mount 160 during operation oflinear compressor 100. Amuffler 194 may be positioned withinchannel 192 withintubular wall 190, e.g., to reduce the noise of compressible fluid flowing throughchannel 192. -
Piston head 132 also defines at least oneopening 196. Opening 196 ofpiston head 132 extends, e.g., along the axial direction A, throughpiston head 132. Thus, the flow of fluid may pass throughpiston head 132 via opening 196 ofpiston head 132 intochamber 118 during operation oflinear compressor 100. In such a manner, the flow of fluid (that is compressed bypiston head 132 within chamber 118) may flow withinchannel 192 throughflex mount 160 andinner back iron 142 topiston 130 during operation oflinear compressor 100. As explained above, suction valve 128 (FIGS. 6-7 ) may be positioned onpiston head 132 to regulate the flow of compressible fluid throughopening 196 intochamber 118. - Referring still to
FIGS. 3 through 9 , alubrication system 200 will be described which may be used withlinear compressor 100. Specifically,lubrication system 200 is configured for circulating a lubricant, e.g., such as oil, through the working or moving components oflinear compressor 100 to reduce friction, improve efficiency, etc. Althoughlubrication system 200 is described herein with respect tolinear compressor 100, it should be appreciated that aspects oflubrication system 200 may apply to any other suitable compressor or machine that requires continuous lubrication. - As shown,
housing 102 generally defines asump 202 which is configured for collecting oil (e.g., as identified herein byreference numeral 204, seeFIG. 8 ). Specifically,sump 202 is defined in the bottom portion oflower housing 104.Lubrication system 200 further includes apump 206 for continuously circulatingoil 204 through components oflinear compressor 100 which need lubrication. In this regard, for example, pump 206 may include apump inlet 208 positioned proximate bottom ofhousing 102 withinsump 202. Pump 206 may draw inoil 204 fromsump 202 throughpump inlet 208 before circulating it throughoutlinear compressor 100, e.g., via a supply conduit 210 (FIG. 7 ). Although only onesupply conduit 210 is shown in the figures for clarity, it should be appreciated thatlubrication system 200 may include any suitable number of supply conduits, nozzles, and other distribution features in order to provideoil 204 to various components throughoutlinear compressor 100. - Notably, according to the illustrated embodiment,
pump inlet 208 is positioned very near and faces the bottom oflower housing 104. In this manner, pump 206 may readily draw inoil 204 even when oil levels are low. Specifically,linear compressor 100 may be configured for receivingoil 204 not to exceed a maxoil fill line 212. For example, the maxoil fill line 212 is identified inFIG. 8 , and may for example extend less than half the way uplower housing 104, less than a quarter of the way uplower housing 104, or lower. During operation, pump 206 may circulateoil 204 throughoutlinear compressor 100 before being recirculated, as will be described in further detail below. Although not illustrated here, it should be appreciated thatlubrication system 200 may include various features for treating, filtering, orconditioning oil 204 during recirculation, such as various filters, screens, etc. In addition, it should be appreciated that althoughpump 206 is illustrated as being positioned withinsump 202, it could be positioned at any other location and may include a fluid passage that drawsoil 204 fromsump 202. - As also illustrated in the figures,
linear compressor 100 may include asuction inlet 220 for receiving a flow of refrigerant. Specifically,suction inlet 220 may be defined on housing 102 (e.g., such as on lower housing 104), and may be configured for receiving a refrigerant supply conduit to provide refrigerant tocavity 108. As explained above,flex mount 160 includestubular wall 190, which defineschannel 192 for directing compressible fluid, such as refrigerant gas, throughflex mount 160 towardspiston head 132. In this manner, desirable flow path of refrigerant gas is throughsuction inlet 220, throughchannel 192, throughopening 196, and intochamber 118.Suction valve 128 may block opening 196 during a compression stroke and adischarge valve 116 may permit the compressed gas to exitchamber 118 when the desired pressure is reached. -
Flex mount 160 may further define achannel inlet 222 which is positioned proximate asecond end portion 174 offlex mount 160 for drawing gas and fromsuction inlet 220 orcavity 108 intochannel 192. Specifically,channel inlet 222 may be an opening onflex mount 160 which extends substantially within a horizontal plane (same vertical position) and opens towardsuction inlet 220. Specifically, according to the illustrated embodiment,channel inlet 222 andsuction inlet 220 may be positioned substantially within the same horizontal plane. According to the illustrated embodiment,suction inlet 220 andchannel inlet 222 are also positioned proximate a midpoint ofhousing 102 along a vertical direction V. However, it should be appreciated that according to alternative embodiments,suction inlet 220 andchannel inlet 222 may be positioned at any other suitable locations withinhousing 102. - Referring now specifically to
FIGS. 6 through 10 ,linear compressor 100 may further include features for expelling or dissipating heat that has built up in the oil or lubricant or elsewhere withinlinear compressor 100. Specifically, according to exemplary embodiments,linear compressor 100 includes aheat dissipation assembly 230 that is positioned withincavity 108 and helps facilitate the discharge of thermal energy from withincavity 108 to outside ofhousing 102. Although an exemplaryheat dissipation assembly 230 is described herein, it should be appreciated that variations and modifications to heatdissipation assembly 230 may be used while remaining within the scope of the present subject matter. For purposes of explaining aspects of the present subject matter,heat dissipation assembly 230 will be described below as being used withlubrication system 200 oflinear compressor 100. However, it should be appreciated that aspects ofheat dissipation assembly 230 may be used in other compressors and in other lubrication systems while remaining within the scope of the present subject matter. - In general,
heat dissipation assembly 230 discharges or expels heat fromlubricant 204 that is absorbed during operation oflinear compressor 100. In this regard, for example,hot lubricant 204 may be transferred directly from the moving components oflinear compressor 100 to a hotoil collection point 232. In this regard,heat dissipation assembly 230 may have any suitable mechanism, tubing, or other features for collectinglubricant 204 and discharging it through hotoil collection point 232 so that it may be cooled byheat dissipation assembly 230, returned tosump 202, and recirculated. For example, according to one exemplary embodiment, hotoil collection point 232 may be defined on casing 110 for passingheated lubricant 204 fromcasing 110. - As best shown in
FIGS. 6 through 10 ,heat dissipation assembly 230 includes adistribution conduit 240 that extends along aninner surface 242 ofhousing 102.Distribution conduit 240 defines afluid inlet 244 that is fluidly coupled to hotoil collection point 232 oncasing 110. Distribution conduit may further define a plurality ofdischarge ports 246 that are configured for spraying, dripping, or otherwise depositing the flow oflubricant 204 along thehousing 102 so that it may re-collect insump 202 before being recirculated bypump 206. In this manner,oil 204 is urged through the working components oflinear compressor 100 to minimize friction and improve operating efficiency, absorbing heat during the process. Theheated oil 204 and then exitscasing 110 through hotoil collection point 232 where it is distributed aroundhousing 102 withindistribution conduit 240. Theheated oil 204 is then sprayed ontohousing 102 which has a lower temperature than theheated oil 204. As theheated oil 204 flows downhousing 102 and re-collects insump 202, thermal energy may be transferred from theoil 204 tohousing 102 where it may be expelled into the ambient environment. In this manner,oil 204 may be recirculated at a cooler temperature, thereby improving performance and lifetime oflinear compressor 100. - In general,
distribution conduit 240 may be fluidly coupled in any manner or by any mechanism to any point or points on casing 110 for receivingheated oil 204. For example, according to the illustrated embodiment,heat dissipation assembly 230 includes asupply tube 250 that extends between and provides fluid communication between hotoil collection point 232 andfluid inlet 244 ofdistribution conduit 240. In this regard, for example,supply tube 250 may be a flexible conduit that is routed from hotoil collection point 232 todistribution conduit 240. According to alternative embodiments,distribution conduit 240 may be directly coupled to casing, e.g., via hotoil collection point 232 or through any other outlet ofcasing 110. -
Distribution conduit 240 may generally have any suitable size, position, and configuration for distributingoil 204 as needed to facilitate operation ofheat dissipation assembly 230 and cooling oflinear compressor 100. For example, according to the illustrated embodiment,distribution conduit 240 extends around the entire circumference ofhousing 102 within a single horizontal plane. More specifically, according to the illustrated embodiment,distribution conduit 240 is a circular conduit that is mounted directly tolower housing 104 via mountingbrackets 252. In general, mountingbrackets 252 are configured for reducing the transfer of vibrations fromdistribution conduit 240 ontohousing 102. - Although
distribution conduit 240 is illustrated as being mounted directly tolower housing 104, it should be appreciated that according to alternative embodiments any other suitable mounting location and mechanism may be used. For example, according to alternative embodiments,distribution conduit 240 may be mounted directly tocasing 110, such thatdistribution conduit 240 simply suspended nearhousing 102. Alternatively,distribution conduit 240 may mounted withinupper housing 106 such thatheated oil 204 is discharged along a larger surface area ofhousing 102 before it is collected withinsump 202. In addition, althoughdistribution conduit 240 is illustrated as a circular conduit extending in a single horizontal plane, it should be appreciated that distribution conduit may have any other suitable cross sectional shape and may be routed through housing in any other suitable pattern or position, e.g., in a serpentine manner, zig-zagged, etc. Other configurations are possible and within the scope of the present subject matter - According to exemplary embodiments,
distribution conduit 240 may be formed from any material which is sufficiently rigid to maintain a fluid passageway and contain a flow oflubricant 204 therein. For example, according to the illustrated embodiment,distribution conduit 240 is a small conduit formed from metal. According to alternative embodiments,distribution conduit 240 may be formed by injection molding, e.g., using a suitable plastic material, such as injection molding grade Polybutylene Terephthalate (PBT), Nylon 6, high impact polystyrene (HIPS), Perfluoroalkoxy (PFA), Flourinated ethylene propylene (FEP), or acrylonitrile butadiene styrene (ABS). Alternatively, according to the exemplary embodiment, these components may be extruded (tubing), compression molded, e.g., using sheet molding compound (SMC) thermoset plastic or other thermoplastics. According still other embodiments,distribution conduit 240 may be formed from any other suitable rigid material. -
Discharge ports 246 that are defineddistribution conduit 240 may have any suitable number, shape, size, and configuration for suitably directing the flow ofheated oil 204 on the desired portions ofhousing 102. For example, according to the illustrated embodiment, the plurality ofdischarge ports 246 include greater than 10, greater than 25, greater than 50, greater than 75, or greater than 100discharge ports 246 that are spaced equidistantly along a length ofdistribution conduit 240. According to still other embodiments,distribution conduit 240 may define regions that do not includedischarge ports 246, e.g., at certain locations where the distribution ofoil 204 may be undesirable, e.g., such asproximate suction inlet 220. - According to an exemplary embodiment, discharge
ports 246 aresimple apertures 260 that are drilled, machined, punched, or otherwise formed withindistribution conduit 240. According to still other embodiments, eachdischarge port 246 may include a discharge nozzle mounted over theaperture 260 for selectively controlling the flow rate and direction of the flow ofoil 204. According to the illustrated embodiment, discharge ports 246 (e.g., apertures 260) are defined on abottom side 262 ofdistribution conduit 240. However, according to alternative embodiments, dischargeports 246 may be defined on the sides, the top, or any other suitable location alongdistribution conduit 240. For example,discharge port 246 may be angled downward along the vertical direction and away from a vertical centerline oflinear compressor 100. In this manner, the flow ofoil 204 is urged directly toward and downlower housing 104 intosump 202. According still other embodiments, dischargeports 246 may be positioned and oriented in any other suitable manner for directingoil 204 ontoinner surface 242 ofhousing 102. - Notably, due to the pressure and flow of
oil 204 withindistribution conduit 240 it may be desirable to restrict the flow, e.g., to prevent splashing and/or atomization ofoil 204. Thus, as best shown inFIG. 10 ,heat dissipation assembly 230 further includes one or moreflow restricting members 270 that are positioned overdischarge ports 246 for restrictingoil 204 from passing throughdischarge port 246. For example, two differentflow restricting members 270 are illustrated inFIG. 10 . It should be appreciated that theseflow restricting members 270 may be used alone or in conjunction with one another. Specifically,flow restricting members 270 may include acoiled spring element 272 that extends around the outer diameter ofdistribution conduit 240 and acts to restrict flow out ofdischarge ports 246. According to alternative embodiments,flow restricting member 270 may be a woven fabric orscreen mesh 274 that is positioned over the plurality ofdischarge ports 246 for restricting flow therethrough. It should be appreciated that any suitableflow restricting member 270 may be used according to alternative embodiments. For example, cross members or mesh screens may be formed withinapertures 260 during the manufacturing process or may be overmolded ontodistribution conduit 240 conduit after it is constructed. - The
heat dissipation assembly 230 described above may be used to cool the operation of a linear compressor, such aslinear compressor 100, or any other compressor. Specifically,heat dissipation assembly 230 may use a mechanism for spraying oil onto the walls of the compressor housing for achieving improved thermal discharge and compressor efficiency. In specific, according to an exemplary embodiment, theheat dissipation assembly 230 uses the spray mechanism (e.g., distribution conduit 240) to spray oil onto an inside surface of the shell evenly and in a controlled manner, such that the shell then conducts the heat to the outer skin wall. The slow flow of oil inside the wall allows the oil to cool. -
Distribution conduit 240 operates by receiving hot oil that leaves the cylinder under force ofpump 206. Thedistribution conduit 240 is provided with multiple holes (e.g., discharge ports 246), and oil is forced out through multiple holes along the bottom-outer periphery. The oil runs down the wall around the entire lower shell inner wall section (losing heat to the wall). The slow flowing oil dribbles down the wall allow cooling of the oil before it reaches the sump. The oil is maintained in liquid form and gives up minimal heat to the suction gas inside the shell. The flow of the oil may be slowed by using a porous or flow restrictive surface (e.g., flow restricting member 270) as the oil comes out of holes in the tubing. For example, a close-fitting spring may be used to cover the outer diameter of thedistribution conduit 240 and provide further flow resistance without atomizing the oil. By contrast, similar materials can be used like a screen or woven nylon or other polymer material to induce oil flow resistance. The flow resistance material allows the oil to evenly flow down the inner wall (also provides a built-in filter for debris as the oil flows through the sock or spring structure which is placed over the distribution conduit 240). By starting with the hottest oil at the top of the structure, the oil flows down to the bottom cooled in the sump before it recirculated into the oil pump and the compression cylinder and piston where it picks up the heat again in a continuous cycle. The enhanced invention provides low cost method to achieve better efficiency and avoids extra braze joints outside the shell. - The written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
Claims (20)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/064,725 US20220106953A1 (en) | 2020-10-07 | 2020-10-07 | Heat dissipation assembly for a linear compressor |
PCT/CN2021/121000 WO2022073436A1 (en) | 2020-10-07 | 2021-09-27 | Heat dissipation assembly for linear compressor |
CN202180068479.0A CN116324163A (en) | 2020-10-07 | 2021-09-27 | Heat radiation assembly of linear compressor |
KR1020237011720A KR20230058719A (en) | 2020-10-07 | 2021-09-27 | Heat dissipation assembly of linear compressor |
EP21876954.5A EP4206466A4 (en) | 2020-10-07 | 2021-09-27 | Heat dissipation assembly for linear compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/064,725 US20220106953A1 (en) | 2020-10-07 | 2020-10-07 | Heat dissipation assembly for a linear compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220106953A1 true US20220106953A1 (en) | 2022-04-07 |
Family
ID=80931205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/064,725 Pending US20220106953A1 (en) | 2020-10-07 | 2020-10-07 | Heat dissipation assembly for a linear compressor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220106953A1 (en) |
EP (1) | EP4206466A4 (en) |
KR (1) | KR20230058719A (en) |
CN (1) | CN116324163A (en) |
WO (1) | WO2022073436A1 (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1264866A (en) * | 1916-08-08 | 1918-04-30 | John Henry Sauers | Refrigerating device. |
US2125645A (en) * | 1936-06-11 | 1938-08-02 | Crosley Radio Corp | Lubricating enclosed engines |
US2138664A (en) * | 1937-01-21 | 1938-11-29 | Crosley Radio Corp | Compressor and lubricating means |
US2198258A (en) * | 1937-01-21 | 1940-04-23 | Crosley Corp | Refrigeration system |
US2504528A (en) * | 1944-09-06 | 1950-04-18 | Philco Corp | Refrigeration apparatus |
US4569639A (en) * | 1982-05-03 | 1986-02-11 | Tecumseh Products Company | Oil distribution system for a compressor |
US5201640A (en) * | 1991-05-28 | 1993-04-13 | Empresa Brasileira De Compressores S/A -Embraco | Suction muffler assembly for hermetic compressors |
KR100439503B1 (en) * | 2004-05-18 | 2004-07-09 | 동화정밀이엔지 (주) | oil separator |
US20140140868A1 (en) * | 2012-11-20 | 2014-05-22 | Emerson Climate Technologies, Inc. | Scroll compressor with oil-cooled motor |
US20170211869A1 (en) * | 2016-01-27 | 2017-07-27 | General Electric Company | Sealed System for An Appliance |
US20180299174A1 (en) * | 2015-11-18 | 2018-10-18 | Kotobuki Sangyo Co., Ltd. | Refrigerant processing device and refrigeration air conditioning system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1156042A (en) * | 1956-08-20 | 1958-05-12 | Vane motor-compressor with oil circulation | |
DE1503408A1 (en) * | 1966-10-15 | 1970-02-26 | Danfoss As | Encapsulated motor compressor, especially for refrigeration machines |
KR100529913B1 (en) * | 2003-08-07 | 2005-11-22 | 엘지전자 주식회사 | Cooling structure of linear compressor |
KR20050121053A (en) * | 2004-06-21 | 2005-12-26 | 삼성전자주식회사 | Compressor |
KR100613516B1 (en) * | 2004-11-03 | 2006-08-17 | 엘지전자 주식회사 | Linear compressor |
CN1786471A (en) * | 2004-12-10 | 2006-06-14 | Lg电子株式会社 | Linear compressor |
KR101457703B1 (en) * | 2008-10-28 | 2014-11-04 | 엘지전자 주식회사 | Compressor |
CN102966515A (en) * | 2012-11-29 | 2013-03-13 | 广州万宝集团压缩机有限公司 | Refrigerator compressor and oil filter device |
CN103912472A (en) * | 2013-01-08 | 2014-07-09 | 海尔集团公司 | Linear compressor |
CN103362783B (en) * | 2013-06-27 | 2015-08-05 | 天津探峰科技有限公司 | A kind of Linearkompressor |
KR101845584B1 (en) * | 2014-11-10 | 2018-04-04 | 엘지전자 주식회사 | Reciprocating compressor |
KR101814239B1 (en) * | 2014-11-10 | 2018-01-02 | 엘지전자 주식회사 | Reciprocating compressor |
KR102259638B1 (en) * | 2016-05-03 | 2021-06-02 | 엘지전자 주식회사 | linear compressor |
CN106224198B (en) * | 2016-07-28 | 2018-04-17 | 西安交通大学 | A kind of servomotor directly drives reciprocating high-pressure air compressor |
-
2020
- 2020-10-07 US US17/064,725 patent/US20220106953A1/en active Pending
-
2021
- 2021-09-27 KR KR1020237011720A patent/KR20230058719A/en active Search and Examination
- 2021-09-27 EP EP21876954.5A patent/EP4206466A4/en active Pending
- 2021-09-27 CN CN202180068479.0A patent/CN116324163A/en active Pending
- 2021-09-27 WO PCT/CN2021/121000 patent/WO2022073436A1/en unknown
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1264866A (en) * | 1916-08-08 | 1918-04-30 | John Henry Sauers | Refrigerating device. |
US2125645A (en) * | 1936-06-11 | 1938-08-02 | Crosley Radio Corp | Lubricating enclosed engines |
US2138664A (en) * | 1937-01-21 | 1938-11-29 | Crosley Radio Corp | Compressor and lubricating means |
US2198258A (en) * | 1937-01-21 | 1940-04-23 | Crosley Corp | Refrigeration system |
US2504528A (en) * | 1944-09-06 | 1950-04-18 | Philco Corp | Refrigeration apparatus |
US4569639A (en) * | 1982-05-03 | 1986-02-11 | Tecumseh Products Company | Oil distribution system for a compressor |
US5201640A (en) * | 1991-05-28 | 1993-04-13 | Empresa Brasileira De Compressores S/A -Embraco | Suction muffler assembly for hermetic compressors |
KR100439503B1 (en) * | 2004-05-18 | 2004-07-09 | 동화정밀이엔지 (주) | oil separator |
US20140140868A1 (en) * | 2012-11-20 | 2014-05-22 | Emerson Climate Technologies, Inc. | Scroll compressor with oil-cooled motor |
US20180299174A1 (en) * | 2015-11-18 | 2018-10-18 | Kotobuki Sangyo Co., Ltd. | Refrigerant processing device and refrigeration air conditioning system |
US20170211869A1 (en) * | 2016-01-27 | 2017-07-27 | General Electric Company | Sealed System for An Appliance |
Non-Patent Citations (1)
Title |
---|
Machine Translation KR-100439503 (Obtained from office SEARCH tool, Clarivate Analytics Copyright 2022, attached to the copy of the provided Patent Document) (Year: 2022) * |
Also Published As
Publication number | Publication date |
---|---|
EP4206466A4 (en) | 2024-01-03 |
EP4206466A1 (en) | 2023-07-05 |
CN116324163A (en) | 2023-06-23 |
KR20230058719A (en) | 2023-05-03 |
WO2022073436A1 (en) | 2022-04-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP4036406A1 (en) | Linear compressor for refrigeration appliance and refrigeration system | |
US10247464B2 (en) | Sealed system for an appliance | |
US9322401B2 (en) | Linear compressor | |
US9739270B2 (en) | Linear compressor | |
US20150226210A1 (en) | Linear compressor | |
US10465671B2 (en) | Compressor with a discharge muffler | |
US10746164B2 (en) | Linear compressor with a coupling | |
US10066615B2 (en) | Linear compressor with a ball joint coupling | |
US9518572B2 (en) | Linear compressor | |
US9528505B2 (en) | Linear compressor | |
EP3967877A1 (en) | Linear compressor having oil splash guard | |
US9932975B2 (en) | Compressor | |
US20220106953A1 (en) | Heat dissipation assembly for a linear compressor | |
US10113540B2 (en) | Linear compressor | |
US11421922B2 (en) | Heat dissipation assembly for a linear compressor | |
WO2020143627A1 (en) | Cooled piston and cylinder for compressors and engines | |
WO2023131080A1 (en) | Linear compressor and flat spring assembly | |
US20220145877A1 (en) | Valve assembly for a reciprocating compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HAIER US APPLIANCE SOLUTIONS, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAHN, GREGORY WILLIAM;VINNIK, ANDREY P.;SIGNING DATES FROM 20200917 TO 20200921;REEL/FRAME:053995/0088 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: ADVISORY ACTION MAILED |