WO2006041147A1 - 圧縮機および冷凍装置および冷蔵庫 - Google Patents
圧縮機および冷凍装置および冷蔵庫 Download PDFInfo
- Publication number
- WO2006041147A1 WO2006041147A1 PCT/JP2005/018919 JP2005018919W WO2006041147A1 WO 2006041147 A1 WO2006041147 A1 WO 2006041147A1 JP 2005018919 W JP2005018919 W JP 2005018919W WO 2006041147 A1 WO2006041147 A1 WO 2006041147A1
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- WIPO (PCT)
- Prior art keywords
- compressor
- refrigerator
- height
- oil
- rotor
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
Definitions
- the present invention relates to a compressor, a refrigeration apparatus using the same, and a refrigerator using the compressor or the refrigeration apparatus.
- a conventional refrigerator is generally one in which a machine room is disposed at the lower rear of the refrigerator body, and a high-pressure side component of a refrigeration cycle such as a compressor is accommodated in the machine room.
- a high-pressure side component of a refrigeration cycle such as a compressor
- refrigerators have been required to improve ease of use and space-saving viewpoints, improve storage, and save energy from the viewpoint of the global environment.
- a method has been proposed in which the machine room is installed on the top of the refrigerator body, which is not convenient to use, or on the upper back of the refrigerator body.
- Such a proposal is shown, for example, in Japanese Patent Laid-Open No. 11 183014!
- FIG. 33 shows a configuration of a refrigerator in which a conventional compressor described in JP-A-11-183014 is applied.
- a refrigerator box body 1 is composed of a refrigerator compartment 2, a vegetable compartment 3, and a freezer compartment 4 from the top.
- the refrigerator compartment 2 has a refrigerator compartment rotary door 5, the vegetable compartment 3 has a vegetable compartment drawer door 6, and the freezer compartment 4 has a freezer compartment drawer door 7.
- the cooling unit 10 having the equal force of the internal fan 8 and the evaporator 9 is refrigerated at substantially the same height as the opening of the freezer compartment 4 that forms a storage portion as the lowermost storage compartment. It is installed at the rear and rear of room 4.
- the compressor 11 is installed in a recess 12 which is a machine room recessed to the refrigerator compartment 2 side across the top surface 11a and the back surface ib of the refrigerator box body 1 which is not easy to use.
- the refrigerator compartment 2 is provided with a plurality of shelves 12b for storing food and the like.
- a recess 12 provided on the upper back of the box body 1 is on a business trip as a protrusion 12e.
- the compressor accommodates an electric element having a stator and a rotor force and a compression element driven by the electric element in a hermetic container, and a mechanical unit composed of the compression element and the electric element is contained in the hermetic container.
- a reciprocating compressor that is elastically supported via a support member and includes a compression chamber and a piston that reciprocates in the compression chamber, the shaft having a main shaft portion and an eccentric portion; It has a rotor fixed to the main shaft portion and a bearing portion that supports the main shaft portion, and the mechanical portion uses a hydrocarbon refrigerant as a refrigerant, and cylinders are relatively compared to the case where R134a is used as a refrigerant.
- the rotor with a large volume has a rotor recess on the compression element side, the bearing portion extends into the rotor recess, and the electric element is an inverter-driven electric motor operated at a plurality of rotation speeds.
- a permanent magnet is used for the rotor of the element.
- the refrigeration apparatus includes a heat insulation box, a compressor provided in the heat insulation box, a condenser, a decompressor, and an evaporator in order to form a series of refrigerant flow paths, and the above-described compression Equipped with a machine.
- the refrigerator includes a heat insulating box, a refrigeration cycle in which a compressor, a condenser, a decompressor, and an evaporator provided in the heat insulating box are sequentially formed to form a series of refrigerant flow paths, and the compressor. Is installed.
- the refrigerator is equipped with the above-described refrigeration apparatus.
- FIG. 1 is a longitudinal sectional view of a compressor according to the present embodiment.
- FIG. 2 is a horizontal sectional view of the compressor according to the present embodiment.
- FIG. 3 is a comparison diagram of an induction motor and an inverter motor of the compressor in the first embodiment.
- FIG. 4 is a plan view of a salient pole concentrated rod stator of the compressor according to the first embodiment.
- FIG. 5 is a perspective view of a leg portion of the compressor of the refrigerator in the first embodiment.
- Fig. 6 is a schematic sectional view of the compressor of the refrigerator according to the second embodiment of the present invention.
- FIG. 7 is a schematic cross-sectional view of a refrigerator compressor according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic cross-sectional view of a compressor in Embodiment 3 of the present invention.
- Fig. 9 is a schematic perspective view of the sealed container of the compressor according to the third embodiment of the present invention.
- Fig. 10 is a schematic plan view of the sealed container of the compressor according to the third embodiment of the present invention. is there.
- FIG. 11 is a schematic sectional view of a compressor in the present embodiment.
- FIG. 12 is a schematic cross-sectional view of the refrigerator according to the fourth embodiment of the present invention.
- FIG. 13 is a schematic rear view of the refrigerator in the same embodiment.
- FIG. 14 is a schematic component development view of the refrigerator in the same embodiment.
- FIG. 15 is a longitudinal sectional view of the compressor of the refrigerator in the same embodiment.
- FIG. 16 is a horizontal sectional view of the compressor of the refrigerator in the same embodiment.
- FIG. 17 is a comparative view of the induction motor and the inverter motor of the compressor of the refrigerator in the same embodiment.
- FIG. 18 is a plan view of the salient pole concentration ⁇ stator of the refrigerator compressor in the same embodiment.
- FIG. 19 is a perspective view of the leg portion of the refrigerator compressor in the same embodiment.
- FIG. 20 is a schematic cross-sectional view of the refrigerator in the fifth embodiment of the present invention.
- FIG. 21 is a schematic view of the refrigerator in the sixth embodiment of the present invention.
- FIG. 22 is a solubility curve diagram of refrigerant and refrigerating machine oil in the same embodiment.
- FIG. 23 is a schematic cross-sectional view of the refrigerator in the seventh embodiment of the present invention.
- FIG. 24 is a schematic rear view of the refrigerator in the same embodiment.
- FIG. 25 is a schematic component development view of the refrigerator in the same embodiment.
- FIG. 26 is a schematic perspective view of the main part of the suction pipe of the refrigerator in the same embodiment.
- FIG. 27 is a schematic cross-sectional view of a compressor mounted on the refrigerator in the embodiment.
- FIG. 28 is a schematic cross-sectional view of the refrigerator transported state in the embodiment.
- FIG. 29 is a schematic cross-sectional view of the compressor when transporting the refrigerator in the same embodiment.
- FIG. 30 is a schematic cross-sectional view of a compressor mounted on a refrigerator in an eighth embodiment of the present invention.
- FIG. 31 is a view of the inside of the compressor mounted on the refrigerator according to the eighth embodiment of the present invention as seen from above.
- FIG. 32 is a schematic sectional view of a compressor mounted on the refrigerator in the ninth embodiment of the present invention.
- FIG. 33 is a schematic sectional view of a conventional refrigerator.
- the convex portion 12e formed on the inner side corresponding to the concave portion 12 which is a machine room has a poor design and the storage property is lowered, so that the convex portion 12e is made as small as possible.
- the recess 12 needs to be lowered. Therefore, the height of the compressor 11, which is the largest factor that determines the height of the recess 12, must be reduced! /,When! There is a problem.
- This is not limited to the refrigerator of the type in which the compressor is arranged in the upper part as in the above-described conventional configuration, but is a refrigerator of a type that has a great restriction with respect to the height direction of the machine room that stores the compressor. If so, the same problem arises.
- the smaller the shape of the compressor the more effective it is because the ineffective volume of the refrigerator can be reduced.
- the size of the compressor can be reduced. The influence that the fluctuation of the oil storage amount changes the oil surface height becomes large. To make it easier to understand, if the compressor has a square prism shape with sides of 150mm and 100mm, and the volume of the internal storage parts is empty, the oil surface height of lmm changes with a 15ml change in oil volume. As the miniaturization progresses, the oil surface height decreases more significantly due to the amount of oil spilled.
- the compressor supplies oil stored in the lower part of the interior to the sliding part using differential pressure or centrifugal force. This is a problem in ensuring reliability, such as a decrease in oil supply and wear of sliding parts.
- the present invention solves the above-described conventional problems, improves storage efficiency in the storage, and further realizes these without impairing the reliability of the compressor due to a decrease in oil returnability.
- the purpose is to provide a compressor that can be mounted in a refrigerator.
- a compressor according to the present invention accommodates an electric element including a stator and a rotor and a compression element driven by the electric element in a hermetic container.
- the mechanical part that also has an electric element force is a reciprocating type that is elastically supported via a support member with respect to the sealed container and includes a compression chamber and a piston that reciprocates in the compression chamber.
- a shaft having a shaft portion, a rotor fixed to the main shaft portion, and a bearing portion that pivotally supports the main shaft portion.
- the machine part uses a hydrocarbon refrigerant as the refrigerant, and has a relatively large cylinder volume compared to the case where R134a is used as the refrigerant.
- a rotor recess is provided on the compression element side of the rotor.
- the bearing portion extends into the rotor recess, and the electric element is an inverter-driven electric motor operated at a plurality of rotation speeds.
- a permanent magnet is used for the rotor of the electric element. Thus, the height of the compressor is reduced.
- the cylinder volume is increased in comparison with R134a, which is an alternative chlorofluorocarbon refrigerant, which has been generally used in the past in the downsizing of the compressor in the height direction.
- R134a is an alternative chlorofluorocarbon refrigerant, which has been generally used in the past in the downsizing of the compressor in the height direction.
- the refrigeration capacity per unit volume of hydrocarbons is about It becomes small to about 1Z2. Therefore, in order to ensure equivalent refrigeration capacity, the cylinder volume of the compressor can be increased to about twice, thereby increasing the volume flow rate of the refrigerant and increasing the flow velocity in the piping during compressor operation. To do.
- the compressor according to the present invention can reduce the protrusion of the machine room, which is a compressor housing space provided in the refrigerator, to the inside of the cabinet, has a good appearance in the cabinet, and has improved storage properties. Compressors to be installed in can be provided.
- the refrigerator of the present invention increases the volume flow rate of the refrigerant flowing in the pipe when the compressor is operating, thereby ensuring a sufficient flow rate for the refrigeration oil to rise and ascend the pipe, and to evaporate.
- the reliability of the refrigerator can be improved by increasing the return amount of refrigeration oil from the refrigerator to the compressor.
- an electric element having a stator and a rotor force and a compression element driven by the electric element are housed in a hermetically sealed container, and a mechanical unit composed of the compression element and the electric element is provided.
- the reciprocating type includes a compression chamber and a piston that reciprocates in the compression chamber and is elastically supported via a support member with respect to the sealed container.
- a shaft having a main shaft portion and an eccentric portion, a rotor fixed to the main shaft portion, and a bearing portion that supports the main shaft portion are provided.
- the machine part uses a hydrocarbon refrigerant as a cooling medium, and has a rotor recess on the compression element side of the rotor whose cylinder volume is relatively large compared to the case where R134a is used as the refrigerant.
- the bearing portion extends into the rotor recess, and the electric element is an inverter-driven electric motor that is operated at a plurality of rotational speeds.
- a permanent magnet is used for the rotor of the electric element. It has been reduced.
- an exciting current necessary for generating rotational torque is not required, and the stator and rotor can be reduced in thickness.
- the height of the compression element and electric element of the compressor can be reduced to reduce the overall height of the compressor, and the height of the recess that is the machine room in which the compressor is installed can be reduced. Reducing the protrusion (convex part) of the recess to the storage space side of the storage space improves the appearance, and the storage space in the storage space The storage becomes wider and the storage property can be greatly improved.
- the cylinder volume is increased in comparison with R134a, which is an alternative chlorofluorocarbon refrigerant that has been generally used in the past, when the compressor is downsized in the height direction.
- R134a is an alternative chlorofluorocarbon refrigerant that has been generally used in the past, when the compressor is downsized in the height direction.
- the cylinder volume of the compressor can be increased to about twice to ensure the same refrigeration capacity. This increases the volume flow rate of the refrigerant and increases the flow velocity in the piping during compressor operation.
- the hydrocarbon refrigerant sealed in the compressor is R600a
- the oil sealed in the compressor uses mineral oil or alkylbenzene.
- the electric element of the compressor is a salient pole concentrated saddle type in which a winding is wound around a plurality of salient pole portions of a stator core constituting the stator via an insulator. It is what.
- the shoreline rises due to the shoreline crossing between the slots because the shoreline crosses between the slots. Therefore, the height of the electric element of the compressor can be further reduced, the overall height of the compressor can be further reduced, and the height of the recess in which the compressor is installed can be reduced. For this reason, the lower storage capacity of the refrigerator is improved, and the protrusions (projections) of the recesses to the storage space side are made smaller to improve the appearance. It can be greatly improved.
- the compression element has a cylinder block having a compression chamber, and the leg portion of the cylinder block is attached to a salient pole concentration saddle type stator.
- the coil end height which is the height at which the winding wire protrudes from the stator core, can be significantly lower than the coil end height of the winding wire of the induction motor.
- the length of the leg portion of the cylinder block can be greatly reduced, and the center of gravity of the compressor can be lowered further downward.
- the permanent magnet housed in the rotor is a rare earth permanent magnet.
- the rare earth magnet has a magnetic flux density that is about four times larger than that of a commonly used ferrite magnet, so that even if the height of the magnet is lowered, the same or higher magnetic flux can be obtained.
- the height of the electric element of the compressor can be further reduced, the height of the entire compressor can be further reduced, and the height of the recess in which the compressor is installed can be reduced.
- the lower storage capacity of the refrigerator is improved, and the protrusions (projections) of the recesses to the storage space side are reduced to improve the appearance, and the storage space in the storage becomes wider and easier to store. Can be greatly improved.
- the mechanical portion composed of the electric element and the compression element of the compressor is elastically supported through a support member in the hermetic container, and the center of gravity of the compressor in the vertical direction;
- the distance between the leg of the compressor and the contact surface of the elastic member is shorter than the distance between the center of gravity of the compressor in the vertical direction and the lower end surface of the support member.
- the vibration amplitude of the compressor is such that the entire compressor vibrates around the center of gravity so that the vibration is greater as the center of gravity is the smallest and the center of gravity is increased. Since the vibration amplitude of the contact surface between the leg closer to the center of gravity and the elastic member is smaller than the vibration of the lower surface of the supporting member, the transmission of vibration to the refrigerator can be further reduced. Therefore, it is possible to provide a high-quality compressor that does not generate noise caused by vibration.
- the mechanical part composed of the electric element and the compression element of the compressor is elastically supported in the hermetic container via the support member, and the leg of the compressor and the elastic member are The contact surface is located above the lower end surface of the support member.
- the vibration of the compressor is transmitted downward through the support member by directing the force downward from the mechanical part which is the vibration generation source, and then the direction is changed upward to the elastic member via the leg part. introduce . Therefore, since the vibration transmission path becomes complicated, the vibration is further attenuated in the transmission path, and the distance between the support member force compressor and the contact surface between the leg of the compressor and the elastic member can be increased. As a result, vibration transmission in a particularly high frequency region is attenuated, and the amplitude of vibration on the contact surface between the leg and the elastic member is reduced, further reducing vibration transmission to the refrigerator and uncomfortable vibration. It is also possible to provide a high-quality refrigerator that does not generate noise due to vibration.
- the vibration amplitude of the compressor is such that the entire compressor vibrates around the center of gravity where the vibration near the center of gravity is the smallest and the vibration increases as it moves away from the center of gravity. Since the vibration amplitude of the contact surface between the leg closer to the center of gravity and the elastic member is smaller than the vibration of the lower surface, the vibration transmission to the refrigerator can be further reduced. It is possible to provide a high-quality compressor that does not generate noise.
- the height of the elastic member is made larger than the distance between the installation surface of the compressor in the recess and the lowermost part of the compressor.
- the leg has a fixing surface that is fixed to the sealed container, a bent portion that rises upward, and a contact surface that locks the elastic member.
- the leg is positioned on the fixed surface of the lower part of the closed container with good workability such as joining, and the bent portion is formed by simple bending of the leg so that the surface on which the elastic member is arranged can be further increased. It is possible to make the contact surface close to the center of gravity, and it is very easy to manufacture.
- the formation of the bent portion makes it possible to increase the distance from the surface where the leg is fixed to the sealed container to the lower surface of the elastic member where the elastic member is disposed, and the distance of vibration transmission from the fixed surface. Since the separation becomes longer, transmission in a particularly high frequency region is attenuated, and vibration transmission to the refrigerator can be further reduced. Therefore, manufacturing is easy and vibration transmission to the refrigerator is reduced. As a result, it is possible to provide a high-quality compressor with low generation of unpleasant vibrations and noise caused by vibrations at low cost.
- the leg is provided with ribs extending in at least two places on the fixing surface, the bent portion, and the lower surface of the elastic member.
- the rigidity of the leg is increased, the eigenvalue of the leg itself is increased, and the leg itself is less likely to vibrate, so that the elastic member arrangement lower surface of the leg from the fixing surface of the sealed container, and thus the elastic member
- the vibration transmission to the refrigerator body can be further reduced.
- the rib can be formed by an easy-to-manufacture press, and the strength of the leg is increased, so that it is possible to improve another problem when the leg is deformed by the transport impact of the refrigerator. .
- the closed container includes an upper container and a lower container, and the plurality of legs fixed to the lower container are installed in the recesses via elastic members, A recess is provided on the compressor installation surface, and an elastic member is provided in the recess so that the height of the elastic member is larger than the distance between the compressor installation surface and the lowest part of the compressor. It is a compressor installed in the refrigerator.
- the thickness of the installation surface is a factor that determines the size of the convex part into the refrigerator compartment, but the thickness to some extent is not enough to obtain the cooling characteristics of the refrigerator and the structure that supports the compressor.
- the compressor according to the present invention has the entire circumference or a part of the depression provided on the installation surface of the compressor. Used, the lower side of the elastic member is fitted and fixed.
- the elastic member can be fixed in position without adding extra parts, the position of the compressor is eliminated, and the vibration transmission change due to the change in the support surface of the elastic member can be reduced. It is possible to provide a compressor that can be mounted on a high-quality refrigerator that significantly reduces the occurrence of unpleasant vibration on the refrigerator installation surface of the components and noise caused by the vibration.
- the compressor of the present invention is provided with a hump portion formed in a concave or convex shape having a smaller curvature than the outer periphery of the hermetic container in the lower container of the hermetic container.
- the bump portion has a leg bump portion provided in the vicinity of a connecting portion between the leg of the compressor provided in the sealed container and the sealed container.
- the bump portion has a support bump portion provided in the vicinity of a connection portion between the lower end surface of the support member and the sealed container.
- the compressor of the present invention is provided with a hump portion having a concave or convex shape having a smaller curvature than the outer periphery of the hermetic container in the lower container of the hermetic container, and the hump portion is provided in the hermetic container. It is provided in the vicinity of the connection part between the compressor leg and the closed container, and by providing the leg in the hump part, it becomes possible to improve the rigidity in the vicinity of the connection part between the compressor and the leg. Even if there is no bent part that rises upward from the fixing surface, if the fixing part of the leg part to the sealed container is a hump part, the hump part can reduce vibration in the vibration transmission path of the compressor. It becomes possible, and vibration transmission to the refrigerator can be reduced.
- the lowermost force of the lower container also has a height to the top of the upper container of 144 mm or less.
- the height from the installation surface to the top of the upper container is 155 mm or less, and the height of the elastic member is 20 mm or more.
- the compressor is configured to be downsized in the height direction by components other than a support portion that supports internal components including the electric element and the compression element. Accordingly, the suction pipe connected to the airtight container of the compressor is provided with an oil outflow prevention trap for preventing the oil from flowing out of the compressor.
- the compressor when the refrigerator is laid down and carried in the refrigerator including the logistics from the customer to the store, the compressor also lies on its side. Even if oil flows into the open end of the suction pipe that is open, the suction pipe is provided with an oil outflow prevention trap, so that it does not flow into the back of the suction pipe, and further from the suction pipe to the evaporator. Oil does not flow backwards.
- the internal low-pressure compressor includes an upper shell and a lower shell that are divided into upper and lower parts, and after the internal components are stored inside, the upper shell and the lower shell are shells.
- the joint is hermetically joined, and the suction pipe provided on the lower shell side opens into the compressor on the same plane as the inner wall surface of the lower shell.
- the refrigerator may be installed after being transported. The oil can be prevented from staying outside the compressor.
- a refrigerant is enclosed in the refrigeration cycle, and the refrigerant In a liquid state, the specific gravity is lighter than the oil sealed in the compressor.
- the refrigerant sealed in the compressor is R600a, and the oil sealed in the compressor uses mineral oil.
- the flow rate in the piping when the refrigerant passes through the refrigeration system is approximately twice as high as the flow rate of 134 & and approximately 20 times that of CO.
- the oil staying in the refrigeration system can be quickly returned to the compressor, and the shortage of oil in the shell can be prevented.
- the refrigeration apparatus of the present invention includes a heat insulation box, a compressor provided in the heat insulation box, a condenser, a decompressor, and an evaporator in this order to form a series of refrigerant flow paths. It is equipped with one of the above-mentioned compressors.
- the compressor in the height direction can be reduced, the reliability of the compressor is ensured, and the compressor with reduced noise and vibration is installed. It is possible to provide a highly reliable refrigeration system with low noise and vibration while greatly reducing the height.
- the refrigerator of the present invention has a refrigeration cycle in which a heat insulating box, a compressor, a condenser, a decompressor, and an evaporator provided in the heat insulating box are provided in this order to form a series of refrigerant channels.
- a heat insulating box a compressor, a condenser, a decompressor, and an evaporator provided in the heat insulating box are provided in this order to form a series of refrigerant channels.
- any one of the compressors or refrigeration units described above is mounted.
- the compressor in the height direction is reduced, the reliability of the compressor is ensured, and the compressor with reduced noise and vibration is mounted. It is possible to provide a highly reliable refrigerator with low noise and vibration while greatly reducing the height.
- the present invention is not limited to the embodiments.
- FIG. 1 is a longitudinal sectional view of the compressor according to the first embodiment
- FIG. 2 is a horizontal sectional view of the compressor according to the first embodiment
- FIG. 3 is an induction of the compressor of the refrigerator according to the first embodiment.
- FIG. 4 is a plan view of a salient pole concentrating cage stator of a refrigerator compressor in the same embodiment.
- FIG. 4 is a comparison diagram of an electric motor and an inverter motor.
- FIG. 5 is a perspective view of the leg portion of the refrigerator compressor in the embodiment.
- a mortar-shaped lower container 101 and a reverse mortar-shaped upper container 102 which are formed by deep-drawing a rolled steel plate having a thickness of 2 mm to 4 mm, are engaged, and the engagement portion is welded all around.
- the sealed container 103 is formed by bonding. Inside the sealed container 103 are stored a refrigerant 104 made of hydrocarbon R600a and a refrigerating machine oil 105 made of mineral oil having high compatibility with R600a at the bottom.
- a leg 106 is fixed to the lower side of the hermetic container 103, and a hole 109 in the elastic member 107 is formed in the pin 108 provided in the concave portion 27 of the refrigerator via an elastic member 107 locked to the leg 106. The position is fixed by loose fitting.
- the leg 106 is elastically supported in the sealed container 103 via a support portion 113a as a support member and a spring 114, and the vertical center of gravity A of the compressor 11 and the leg 106 of the compressor are elastically supported.
- the distance between the contact surface 106a and the member 107 B force B is configured to be shorter than the distance C between the vertical center of gravity A (“A” in FIG. 1) of the compressor 11 and the lower end surface 113b of the support member. !
- the compressor in the case where the center of gravity A in the height direction of the compressor is above the contact surface 106a between the leg 106 of the compressor and the elastic member 107, the compressor The contact surface 106a between the leg 106 of the compressor and the elastic member 107 is located above the lower end surface 113b of the support member inside.
- the height of the elastic member 107 is larger than the distance F between the installation surface D in the concave portion of the compressor and the lowest end E of the compressor.
- the leg 106 has a fixing surface 106b that is fixed to the closed container, a bent portion 106c that rises upward, and an elastic member arrangement lower surface 106d that locks the elastic member, and the fixing surface 106b and the bent portion 106c Ribs 106e extending across at least two of the elastic member disposing lower surface 106d are provided.
- the electric element 110 includes a rotor 111 and a salient pole concentrated winding stator 112.
- the compression element 113 is built above the electric element 110 and is driven by the electric element 110.
- the electric element 110 and the compression element 113 are both housed in the hermetic container 103 and elastically supported by the bottom part of the lower container 101 and the lower end of the stator 112 via a support part 113a as a support member and a spring 114. Yes.
- the support portion 113a and the spring 114 provided at the lower end of the stator 112 are support members that elastically support the mechanical portion.
- a terminal 115 constituting a part of the lower container 101 is for communicating electricity (not shown) inside and outside the sealed container 103, and supplies electricity to the electric element 110 through the lead wire 116.
- the sealed container 103 contains a discharge tube 120 for connection to the discharge pipe 31 of the refrigeration system, a suction tube 121 for connection to the suction pipe 33, and a refrigerant 104 in the refrigeration system, and then the system is closed.
- a sealing tube 122 is provided.
- the refrigerant 104 is sucked into the sealed container 103 through the suction pipe 33 and the suction tube 121 and discharged from the discharge tube 120 to the discharge pipe 31.
- the discharge pipe 31 inertially connects the compression element 113 and the discharge tube 120 of the sealed container.
- the shaft 130 has a main shaft portion 131 to which the rotor 111 is fixed by press-fitting or shrink fitting, and an eccentric portion 132 formed eccentric to the main shaft portion 131.
- the cylinder block 133 has a substantially cylindrical compression chamber 134 and a bearing portion 135 for supporting the main shaft portion 131 of the shaft 130, and is formed above the electric element 110.
- a rotor recess 11 la is formed on the compression element side of the rotor 111, and a bearing portion 135 extends into the rotor recess 111a.
- the piston 136 is loosely fitted in the compression chamber 134 and connected to the eccentric portion 132 of the shaft 130 by the connecting means 137, and the rotational motion of the shaft 130 is converted into the reciprocating motion of the piston 136.
- the piston 136 expands and contracts the space of the compression chamber 134 to suck the refrigerant 104 in the sealed container 103 from the suction port 141 of the suction muffler 140, and a valve (not shown) provided inside the cylinder head 142. )
- the discharge muffler 143 formed on the cylinder block 133, the discharge pipe 144, the discharge tube 120 and the discharge pipe 31 to the outside of the sealed container 103.
- the discharge pipe 144 which is a high-pressure pipe, is a steel pipe with an inner diameter of 1.5 mm to 3. Omm, and is formed to be flexible using L-shaped or U-shaped bending.
- the discharge tube 120 of the container 103 is elastically connected.
- the rotor 111 has a main body 150 in which silicon steel plates of 0.2 mm to 0.5 mm are stacked, a hole 152 for housing the permanent magnet 151 provided in the main body 150, and a hole 1 52 after inserting the permanent magnet 151. It is composed of an end plate 153 that closes the cover, and is integrally fixed by a forceps pin 154.
- the stator 112 includes a stator core 161 in which silicon steel plates having a thickness of 0.2 mm to 0.5 mm are stacked, and a wire 162 that is a copper wire having an insulation coating of 0.3 mm to lmm.
- the stator core 161 is a salient pole concentrated saddle type in which salient pole portions 171 are formed in an annular shape at predetermined intervals, and a salient wire 162 is wound around the salient pole portion 1701.
- Each shoreline is connected by a connecting line 172.
- FIG. 3 shows a comparison of the cross section of the induction motor on the left side and the cross section of the inverter motor on the right side with the center line as a boundary.
- Each electric motor is used for a compressor having almost the same maximum refrigerating capacity.
- the height L1 of the stator core 161 of the inverter motor stator 112 is significantly lower than the height HI of the stator core 181 of the induction motor stator 180.
- the height L4 of the rotor 111 of the inverter motor is also lower than the height H4 of the rotor 182 of the induction motor.
- the coil end heights L2 and L3 where the winding wire 162 protrudes from the stator core 161 are the coil end height H2 of the induction motor's winding wire 183. It is much lower than H3. Furthermore, by using a rare earth magnet as the permanent magnet 151, the height L5 of the permanent magnet 151, the height L1 of the stator iron core 161 of the inverter motor, and the height L4 of the rotor 111 can be further reduced.
- the compressor 11 When the compressor 11 is energized, the electric element 11 passes through the terminal 115 and the lead wire 116. Electricity is supplied to the zero stator 112, and the rotor 111 rotates by the rotating magnetic field generated by the stator 112. Due to the rotation of the rotor 111, the eccentric portion 132 of the shaft 130 connected to the rotor performs a rotational motion that is eccentric from the axis of the shaft 130. The eccentric motion of the shaft 130 is converted into a reciprocating motion by the connecting means 137 connected to the eccentric portion 132 and becomes a reciprocating motion of the piston 136 connected to the other end of the connecting means 13 7. The refrigerant 104 is sucked and compressed while the volume in 134 is changed.
- the volume of the piston 136 that is sucked and discharged during one reciprocation in the compression chamber 134 is referred to as a cylinder volume, and the cooling capacity varies depending on the cylinder volume.
- the compressor 11 supported by the elastic member 107 and the legs 106 that perform the above-described operation is mounted in a machine room (not shown) that is a recess formed in the back of the refrigerator.
- the depth (height) of the recess is determined by the height of the compressor 11.
- a convex portion corresponding to the concave portion is on a business trip in the refrigerator. If the convex part is large, the storage property deteriorates, so a technique for reducing the height of the compressor 11 is required.
- the height of the compressor 11 will be specifically described.
- 2 to 4 mm steel plates are used for the lower container 101 and the upper container 102, and the total is about 7 mm.
- the lower container 101 and the upper container 102 each have a shape with a curvature in the vertical direction. This is because a specification with low noise is desired to make the living space where the refrigerator is installed comfortable.
- the curvature is approximately RlOOmm to R150mm in radius, and to obtain this curvature, a little over 13mm is required on one side.
- refrigeration oil 105 is stored at the bottom of the hermetic container 103.
- the refrigerating machine oil 105 is sealed in approximately 200 to 250 ml in order to guarantee the operation of the compressor 11 under various conditions, and occupies about 20 mm in height. Furthermore, if the refrigerating machine oil 105 and the electric element 110 come into contact with each other, an abnormal increase in input occurs, so that a clearance of about 9 mm is necessary to prevent contact.
- the compressor 11 installed in a household refrigerator is more important to reduce the noise of the compressor 11 at the same time as downsizing.
- securing refrigeration oil 105 is also important. From these things, the plate thickness of 7mm Therefore, it is necessary to reduce the size to 13mm by curvature, 20mm by curvature and oil, and 9mm necessary for securing the clearance.
- the height of the compressor 11 is largely determined by the electric element 110 and the compression element 113.
- the compression element 113 is a force that can make the piston 136, the coupling means 137, the shaft 130, and the bearing portion 135 compact by reducing the cylinder volume.
- R134a which is conventionally used in general
- the cylinder volume can be reduced to about 1Z2 to achieve the same refrigeration capacity.
- the cylinder volume of the compressor can be increased to about twice. This increases the volume flow rate of the refrigerant and increases the flow velocity in the pipe when the compressor is in operation.
- the refrigeration oil rises and the pipe is Sufficient flow rate can be secured to increase, and the evaporator power can improve the reliability of the compressor by increasing the return amount of refrigeration oil to the compressor.
- the compatibility of the refrigerant with the R600a refrigerant and the use of the mineral oil, which is a refrigerating machine oil increase the solubility of the refrigerant in the refrigerating machine oil compared to the conventional combination of Rl 34a and ester oil. Therefore, even during defrosting, the reliability of the compressor can be further improved by using the thermosiphon effect to increase the return amount of the refrigeration oil to the evaporator compressor together with the refrigerant.
- the electric element 110 is an operation of the compressor 11 in the induction motor unless the thickness HI and H4 of the stator 180 and the rotor 182 are large. Necessary torque is not generated.
- the use of an inverter motor using permanent magnets 151 for the rotor 111 eliminates the need for the excitation current necessary for generating rotational torque, so the thickness L1 of the stator 112 and the rotor 111 The thickness L4 can be lowered, and the electric element 110 can be made compact.
- the induction motor must pass a current to the rotor side (secondary side). Force that requires a large thickness Inverter motors have a magnet on the secondary side, which eliminates the need for an excitation current to generate torque, and can reduce the thickness.
- the dimension of the winding wire 162 of the stator 112 of the electric element 110 that protrudes from the stator core 161 is larger than the protruding dimensions H2 and H3 of the winding wire 183 in the distribution cage.
- H2 and H3 the protruding dimensions of the winding wire 183 in the distribution cage.
- the electric element 110 is reduced in size, and the cylinder block 133, which is a compression element, is concentrated on the salient pole.
- the height dimension of the leg portion 133a to be attached to the stator core 161 can be greatly shortened, and the compression element can be downsized at the same time.
- the magnetic properties are excellent, such as about 4 times the magnetic flux density and about 10 times the energy product of a general ferrite magnet. Even if it is small, sufficient characteristics can be obtained. Therefore, the height L5 of the permanent magnet 151 and the height L1 of the stator 112 can be further reduced, and the electric element 110 can be made more compact.
- a rotor recess 111a is formed on the compression element 113 side of the rotor 111, and a bearing portion 135 extends into the rotor recess 111a. Therefore, according to the present invention, the electric element 110 and the compression element 113 are placed on the projection surface in the height direction so as to overlap each other without shortening the length of the bearing portion 135, so that the electric element 110 The overall height of the machine part including the compression element 113 can be greatly reduced, and the height of the compressor can be further reduced without degrading the reliability of the compressor.
- the stator 1 80 has a stacking force of 2 mm, the coil end 183 has a coil end height H2, H3 is 25 mm, and the rotor 182 has a height. H4 is 65mm.
- the stator L 112 has a stack thickness L1 of 26 mm, and when a rare earth magnet is used, the lower L1 is 16 mm, and the coil end heights L2 and L3 of the stator wire 162 of the stator 112 are Using salient pole concentration rod, L2 and L3 are 9mm Become.
- the rotor 111 can be 35 mm thick and can be reduced to 20 mm by using rare earth magnets, and it can be reduced by up to 58 mm compared to a compressor using an induction motor.
- the rotor recess 111a is formed on the compression element 113 side of the rotor 111 at a depth of more than half the height of the rotor. Since the bearing portion 135 extends into the rotor recess 11 la, the thickness of the rotor 111 is reduced to 35 mm, and when a rare earth magnet is used, it is reduced to 20 mm. Since the height of the machine part can be reduced to about 10 mm, the total height of the machine part can be reduced by about 25 mm.
- the compressor element 113 is located in the upper part as in the present embodiment, and the electric element 110 is located in the lower part thereof.
- the rotor is held only by the fixing force with the shaft. For this reason, for example, when an electric motor that obtains a magnetic force by flowing current through the rotor, such as an induction motor, the heat generated by the rotor 111 during operation increases and the shaft expands due to thermal expansion. Since there is a possibility that the rotor 111 falls off from 130, there is a possibility that the fixing allowance of the rotor 111 to the shaft 130 cannot be significantly shortened due to reliability problems.
- the fixing allowance can be significantly shortened. For example, even if the fixing allowance is reduced to about 6 mm, which is 20% or less of the total height of the rotor, the fixing force is sufficient, and the rotor 111 is removed from the shaft 130 due to heat generated during operation, vibration or impact due to transportation, etc. There is no such thing as dropping out. Improvement of reliability by taking longer sliding length of shaft 130 and bearing part 135, The height of the entire machine unit composed of the compression element 113 and the electric element 110 can be reduced while ensuring the fixing force between the rotor 111 and the shaft 130.
- the oil supply capability by the oil supply mechanism (not shown) provided inside the shaft 130 can be improved.
- This is a lift that raises the refrigerator oil 105 up to the spiral groove for refueling the shaft 130 so that the distance between the lower end sliding between the bearing portion 135 and the shaft 130 and the refrigerator oil 105 is a spiral groove for oil supply of the shaft 130.
- the oil supply capacity to the sliding part between the shaft 130 and the bearing part 135 and the sliding part of the compression element 113 via the shaft 130 is improved, thereby improving the reliability. It is.
- this improvement in the oil supply capacity is proportional to the decrease in the number of revolutions when the compressor 11 is operated at a lower speed by installing the inverter motor as in the present embodiment.
- the sliding part is improved by improving the oil supply capacity. Enables stable supply of refrigeration oil 105 to
- the electric element 110 of the compressor 11 is driven by an inverter drive that is operated at a plurality of rotation speeds including a frequency higher than the commercial power supply frequency.
- the compressor 11 can be made smaller, and the height of the recess 27 that is a machine room in which the compressor 11 is installed can be reduced. Therefore, the protrusion of the concave portion 27b toward the storage space in the storage space of the concave portion 27 can be reduced to improve the appearance, the storage space in the storage space can be widened, and the storage performance can be greatly improved.
- a salient pole concentrated saddle type in which a plurality of salient pole portions 171 of a stator core 161 constituting the stator 112 of the compressor 11 are wound with a winding 162 through an insulator, or a permanent magnet.
- a rare earth magnet for 151 the compressor 11 can be further reduced.
- the compression element 113 employs a reciprocating type including a compression chamber 134 and a piston 136 that reciprocates within the compression chamber 1 34, and is a sealed container.
- the compression element 113 and the electric element 110 are inertially supported via the spring 114. Yes.
- the reciprocating compressor is an internal low-pressure type
- the electric element 110 is disposed below the sealed container 103, and the support 113a serving as a support member with respect to the sealed container 103 and the spring. It is supported by inertia through 114.
- the compression element 113 is disposed above the electric element 110 and is connected to the sealed container 103 via a discharge pipe 144 which is a high-pressure pipe having an elastic shape. Since the compression element 11 3 which is a vibration source of the compressor is disposed via the electric element part 110 with respect to the support member in the hermetic container 103, the elastic support part is compared with the case where the compression element 113 is directly elastically supported.
- the distance of the force can be further increased, and the vibration generated in the compression element 113 is attenuated when passing through the stator of the electric element 110 having high rigidity, and then is supported from the compressor support member to the outside of the compressor. Therefore, the vibration of the compressor can be reduced.
- the discharge pipe 144 which is a high-pressure pipe in the compression element 113, also has elastic shape force, the vibration of the compression element 113 is attenuated by the discharge pipe 144 and then transmitted to the outside of the compressor. The vibration of the compressor can be further reduced.
- the leg 106 is elastically supported in the hermetic container 103 via a support portion 113a as a support member and a spring 114.
- the distance B between the vertical center of gravity A of the compressor and the contact surface 106a of the compressor leg 106 and the elastic member 107 is equal to the vertical center of gravity A of the compressor and the lower end surface 113b of the support member. It is shorter than the distance C.
- the vibration amplitude of the compressor is such that the entire compressor vibrates around the center of gravity where the vibration is greater as the center of gravity A is the smallest and the force of the center of gravity is further away. Center of gravity from bottom Since the vibration amplitude of the contact surface between the leg 106 close to the elastic member 107 and the elastic member 107 is reduced, vibration transmission to the refrigerator can be further reduced.
- the permanent magnet 151 is used for the rotor 111, and the height of the rotor 111 is lowered, or the stator 112 is made a salient pole concentrated saddle to reduce the height of the stator 112.
- the center of gravity of the entire electric element 110 can be lowered.
- stator 112 When the stator 112 is a distributed winding, since the winding wire protrudes upward from the portion of the cylinder block 133 attached to the stator 112, the dimension of the leg portion of the cylinder block 133 is reduced. It was necessary to take more than the protruding dimension. However, by making the stator 112 into a salient pole concentrated saddle type, it is possible to shorten the leg of the cylinder block 133 that is the mounting part of the cylinder block 133 to the stator 112, and the center of gravity of the compression element is also low. can do.
- the cylinder block 133 can be lowered further and the center of gravity can be lowered.
- the 135 is extended further into the rotor to reduce the internal height, and on the external configuration surface, the mounting surface of the leg 106 on the elastic member 107 is raised to reduce the overall height even when installed in the refrigerator
- a low vibration type compact compressor with low center of gravity and high support stability can be realized.
- the contact surface 106a between the leg of the compressor and the elastic member is located above the lower end surface 113b of the support member.
- the vibration of the compressor is directed downward from the machine part that is the source of vibration and transmitted through the support member, and then the direction is upward. And is transmitted to the elastic member 107 via the leg 106.
- the vibration transmission path becomes complicated, the vibration is further attenuated in the transmission path, and the distance between the support member force compressor leg 106 and the elastic member 107 can be increased. Therefore, vibration transmission in a particularly high frequency region is attenuated, and the amplitude of vibration of the contact surface 106a between the leg 106 and the elastic member 107 is reduced. Further, vibration transmission to the refrigerator can be reduced, which is uncomfortable. This means providing a high-quality refrigerator that does not generate significant vibrations or noise caused by vibrations.
- the leg 106 has a fixing surface 106b that is fixed to the sealed container 103, a bent portion 106c that rises upward, and an elastic member disposing lower surface 106d that locks the elastic member.
- the leg is positioned on the fixing surface 106b of the lower part of the sealed container 103 having good workability such as joining, and the surface on which the elastic member is arranged should be the lower surface of the elastic member arrangement closer to the center of gravity. It can be formed by simple leg bending and is very easy to manufacture.
- the fixing surface 106b of the leg 106 that is fixed to the sealed container 103 is lower than the lower end surface 113b that is the fixing surface of the support member 113a of the lower container 101.
- the vibration of the compression element 113 that is the vibration source of the compressor is farthest from the excitation source among the sealed containers 103 through the electric element 110 and also through the spring 114 supported by the support member 113a. It is transmitted to the fixing surface of the support member 113a at the part. Therefore, the vibration is greatly damped.
- the leg 106 extends in a substantially horizontal direction from the fixing surface, rises vertically upward by the formation of the bent portion 106c, and then bends in the substantially horizontal direction again, and then the elastic member arrangement lower surface 106d is formed. Therefore, the vibration transmission path is complicated and long up to the contact surface 106a with the elastic member 107, and the vibration transmission is attenuated. Furthermore, since the elastic member 107 has a lower surface 106d closer to the center of gravity A in the vertical direction of the compressor and the elastic member 107 has a sufficient length, the elastic member 107 can sufficiently dampen vibration. As a result, vibration transmission to the refrigerator can be sufficiently reduced, and a high-quality refrigerator free from unpleasant vibration and noise caused by vibration can be provided.
- the vertical rising height is 24 mm. This is about 16% of the total height of the compressor.
- the vertical rising height is determined from the lower end surface 113b of the support portion 113a. Since the lower end of the spring 114 engaged with the support portion 113a is fitted to the support portion 113a, it is fixed to the sealed container without elasticity. Therefore, it is more desirable that it be above the lower end of the spring having elasticity with respect to the sealed container.
- the formation of the bent portion 106c makes it possible to increase the distance from the surface where the leg 106 is fixed to the sealed container 103 to the lower surface of the elastic member where the elastic member 107 is disposed. Since the distance of the vibration transmission becomes longer, the transmission of the region is attenuated especially at a high frequency, and the vibration transmission to the refrigerator can be made less. Therefore, manufacture is easy and vibration transmission to the refrigerator can be reduced, and providing a high-quality refrigerator free from unpleasant vibration and noise caused by vibration can be achieved at low cost.
- the leg 106 by providing the leg 106 with the rib 106a extending over the bent portion 106c and the elastic member disposing lower surface 106d, the rigidity of the leg 106 is increased, and the eigenvalue of the leg 106 itself is increased. At the same time, the leg 106 itself vibrates, so that vibration transmission from the fixing surface of the sealed container 103 to the elastic member and the refrigerator main body through the leg can be further reduced.
- the rib can be formed by a press that is easy to manufacture, and the strength of the leg is increased. Therefore, another problem that the leg is deformed by the transport impact of the refrigerator can be improved.
- the downsizing elements in the height direction of the compressor 11 are roughly classified into the viewpoints corresponding to the electric elements 110 and the viewpoint corresponding to the compression elements 113. These two points Ability to employ elements together Whether or not to keep it in either element can be selected based on a balance between the height reduction requirement and other characteristics and quality.
- a method of mainly configuring a height reducing element included in the electric element 110 includes the compressor 11
- the upper arrangement is advantageous in terms of miniaturization while suppressing the effects on noise and vibration.
- the compressor 11 is placed on the top of the refrigerator box body 1 so that the compressor 11 is closer to the user's ear. Therefore, it is important to combine the miniaturization elements so that miniaturization by reducing the height of the compressor 11 does not affect the noise and vibration of the refrigerator.
- the structure that supports the electric element 110 and compression element 11 3 and the structure that supports the airtight container 103 incorporates a device to reduce the height while suppressing noise and vibration, or is a mere height that adversely affects noise and vibration. Consideration is also effective if the design for reducing the thickness is not included.
- FIG. 6 is a schematic cross-sectional view of the compressor of the refrigerator in the second embodiment of the present invention.
- FIG. 7 is a schematic cross-sectional view of the refrigerator compressor according to Embodiment 2 of the present invention.
- a compression element 209 includes a main bearing 220 and a countershaft which are bearing portions that support the main shaft portion 210b, the subshaft portion 210c, and the main shaft portion 210b coaxially with the eccentric portion 210a of the shaft 210 interposed therebetween.
- a secondary bearing 221 that pivotally supports 210c is provided.
- the eccentric part 210a is provided with a piston 232 that reciprocates in the compression chamber 231 via the connecting member 230.
- the sealed container 250 includes an upper container 251 and a lower container 252, and a plurality of legs 260 fixed to the lower container 252 are installed in the recesses via the elastic member 270.
- Recess compressor The installation surface 280 is provided with a recess 281 and the elastic member 270 is disposed in the recess 281 so that the height of the elastic member 270 is larger than the distance between the compressor installation surface 280 and the lowest part 290 of the compressor.
- a compressor is installed. Further, the lower side of the elastic member 270 is fitted and fixed in the recess 281.
- the refrigerant is compressed to a high pressure in the compression chamber 231, so this compression load is transmitted to the eccentric part 210 a via the piston 232 and the connecting member 230.
- This surface pressure increases as the sliding length between the main shaft portion 210b of the shaft 210 and the main bearing 220 becomes shorter.
- the shaft 210 is supported by the main shaft portion 210b and the main bearing 220 of the shaft 210, and the shaft 210 is supported at the two locations of the auxiliary shaft portion 210c of the shaft 210 and the auxiliary bearing 221 that supports the shaft 210. Therefore, the piston 232 as a vibration source can be supported by both side forces, and the shaft can be prevented from being bent further and the reliability of the sliding surface of the shaft 210 can be improved.
- the sliding length of the main bearing 220 is shortened compared to the conventional case, the sliding length of the entire shaft 210 can be secured by complementing with the sliding length of the auxiliary bearing 221.
- the height of the compressor can be further reduced without degrading the reliability of the compressor.
- the piston that performs reciprocating motion is used. Since the main bearing 220 and the sub-bearing 221 are located on both sides of the eccentric part 210a having the shaft 232, the piston 232 as a vibration source can be supported from both sides, further preventing the shaft 210 from being bent, The reliability of the sliding surface of the shaft can be improved. Therefore, even if the sliding length of the main bearing is shorter than before, the reliability of the compressor can be ensured, so that the height of the compressor can be further reduced without reducing the reliability of the compressor. Can do.
- the auxiliary bearing 221 is provided on the opposite side of the main bearing 220 with the eccentric portion 210a interposed therebetween.
- the auxiliary shaft portion is provided coaxially with the main shaft portion 210b with the rotor 240 interposed therebetween.
- the concave member 281 is provided on the compressor installation surface 280 of the concave portion, and the height of the elastic member 270 is increased by disposing the elastic member 270 in the concave portion 281. It is larger than the distance between the compressor installation surface 280 and the lowermost part 290 of the compressor. This makes it possible to increase the height of the elastic member 270 which is effective for transmitting the vibration of the compressor force to the refrigerator.
- the thickness of the installation surface is a factor that determines the size of the convex part into the refrigerator cabinet, but a certain thickness is necessary to obtain the cooling characteristics of the refrigerator and as a structure to support the compressor.
- vibration transmission is reduced by increasing the height of the elastic member, cooling characteristics are ensured by securing the thickness of the installation surface, and strength is secured as a structure that supports the compressor. Can be compatible. Therefore, by increasing the height of the elastic member effective for transmitting vibration from the compressor, unpleasant vibration and noise generation due to vibration can be greatly reduced, and the heat insulation of the refrigerator can be reduced. Therefore, it is possible to maintain the characteristics by securing the properties and to maintain the transport resistance by securing the strength of the structure, and to provide a high-quality refrigerator.
- FIG. 8 is a schematic cross-sectional view of the compressor according to Embodiment 3 of the present invention.
- FIG. 9 shows the present invention.
- 6 is a schematic perspective view of a hermetically sealed container of a compressor in Embodiment 3.
- FIG. 10 is a schematic plan view of a sealed container of the compressor according to Embodiment 3 of the present invention.
- FIG. 11 is a schematic sectional view of the compressor in the present embodiment.
- a plurality of bumps 410 are provided at the bottom of the sealed container 403.
- the plurality of bump portions 410 are mainly a convex bump portion in which the internal force of the sealed container is also convex outward, and a concave shape that is concave from the outside to the inside of the sealed container 403. And a concave bump 411.
- a leg bump portion 410a is provided in the vicinity of the connecting portion 420 between the compressor leg 406 and the closed vessel 403 provided in the closed vessel 403.
- the leg bump portion 410a is a convex bump portion in which the periphery of the connecting portion 420 is formed with a curvature that is clearly smaller than the curvature of the outer periphery of the sealed container.
- the support member 413 that supports the electric element inside the hermetic container and the mechanical part having the compression element force includes a support part 413a that is a support member and a spring 414 that is also an elastic member.
- a support bump portion 410b is provided in the vicinity of the hermetic container located on the lower end surface of the support portion 413a.
- the support bump portion 410b is a convex bump portion in which the periphery vertically below the support portion is formed with a curvature that is clearly smaller than the curvature of the outer periphery of the sealed container.
- the sealed container 403, the leg 406, and the lower support portion 413a of the spring 414 are fixed by spot welding, that is, the lower end portion of the leg 406 and the support portion 413 is attached to the convex bump portion. Welded.
- the closed container has a concave bump 411 that is recessed inward from the outer periphery of the closed container, and has a curvature that is clearly smaller than the curvature of the outer periphery of the closed container. It is formed continuously with the bump portion 410b.
- a plurality of bumps 410 are provided particularly in the lower part of the sealed container 403.
- the airtight container 403 has a flat curved surface that is close to a flat surface as described above, the portion becomes less rigid and easily affected by noise and vibration.
- the support bump portion 410b is provided in the vicinity of the hermetic container located at the lower end surface of the support part 413 of the mechanical part that is a vibration source and the hermetic container. Vibration force at the part When propagating to the sealed container via the S spring 414, the support bumps having a small curvature in the vicinity of the connection part 420, which is the fixing surface between the lower end of the support part 413a and the sealed container 403 It is transmitted to part 410b. By doing so, it is possible to improve the rigidity in the vicinity of the lower end portion of the support portion, so that vibration and noise propagating from the compressor to the sealed container can be reduced.
- a leg cove portion 410a is provided in the vicinity of the connecting portion 420 between the compressor leg 406 and the hermetic container 403, which is an external support of the compressor on the lower surface side of the hermetic container, such as the hermetic container 403 and the leg.
- the rigidity in the vicinity of the connection portion 420 can be improved. Therefore, vibration and noise propagating from the sealed container to the refrigerator body via the leg 406 can be reduced.
- the lower surface side of the hermetic container is close to a flat surface. Even in the case of a curved surface of curvature, it is possible to provide a refrigerator with further reduced vibration and noise by using a compressor with improved rigidity, particularly in the vibration transmission path of the sealed container.
- the concave bump portion 411 is formed continuously from the support bump portion 410b and is recessed inside the sealed container.
- the concave and convex portions having a small curvature are continuously formed in a complicated shape.
- the legs of the compressor as described in the first embodiment.
- the contact surface 106a between the elastic member and the elastic member is located above the lower end surface 113b of the support member.
- the vibration amplitude of the compressor is the smallest in the vicinity of the center of gravity A and from the center of gravity. Since the entire compressor vibrates around the center of gravity where vibration increases as it moves away, the vibration amplitude of the contact surface between the leg 106 and the elastic member 107 closer to the center of gravity is smaller than the lower surface of the support member that supports the machine part. As a result, vibration transmission to the refrigerator can be further reduced.
- the compressor of the recess as described in the second embodiment.
- the installation surface 280 is provided with a recess 281 and the elastic member 270 is disposed in the recess 281 so that the height of the elastic member 270 is larger than the distance between the compressor installation surface 280 and the lowest part 290 of the compressor.
- the elastic member can be made larger, which can further reduce the vibration and noise of the refrigerator. it can.
- a hump portion having a small curvature around the vibration transmission path of the sealed container 403 as in the present embodiment.
- the fixing surface 456a of the portion is provided, the fixing surface force as described in the first embodiment, the rising force upward, and the 3 ⁇ 4 having a bent portion, even in this case, to the sealed container of the leg portion
- the fixed portion is a hump portion, it is possible to reduce vibration in the vibration transmission path of the compressor by the hump portion.
- the vibration amplitude of the compressor is such that the entire compressor vibrates around the center of gravity where vibration is greater as the center of gravity A is the smallest and the force of the center of gravity is further away from the center of gravity.
- the contact amplitude between the leg 456 close to the elastic member 457 and the elastic member 457 reduces the amplitude of vibration of the 458.
- vibration transmission to the refrigerator can be reduced.
- FIG. 12 is a schematic cross-sectional view of the refrigerator according to Embodiment 4 of the present invention
- FIG. 13 is a schematic rear view of the refrigerator according to the same embodiment
- FIG. 14 is a schematic component development view of the refrigerator according to the same embodiment
- FIG. FIG. 16 is a horizontal sectional view of the refrigerator compressor in the embodiment
- FIG. 17 is an induction motor and an inverter of the refrigerator compressor in the embodiment
- FIG. 18 is a plan view of the salient pole concentration rod stator of the compressor of the refrigerator in the same embodiment.
- FIG. 19 is a perspective view of a leg portion of the compressor of the refrigerator in the same embodiment.
- a box body 1 is a heat insulator that foams and fills a space composed of an inner box 13 formed by vacuum forming a resin body such as ABS and an outer box 14 using a metal material such as a pre-coated steel plate. It has a heat insulation wall made by injecting 15.
- the heat insulator 15 for example, rigid urethane foam, phenol foam, styrene foam, or the like is used.
- the foam material it is more preferable from the viewpoint of prevention of global warming to use a hydope carbon-based cyclopentane.
- the box body 1 is divided into a plurality of heat-insulating sections, and a door 15a is provided on the front surface.
- the door 15a has a configuration in which the upper part is a revolving door type and the lower part is a drawer type.
- the insulated storage room 15b is a refrigerator room 2 from above, a drawer-type switching room 16 and an ice making room 17, a drawer-type vegetable room 3, and a drawer-type freezer room 4 arranged side by side.
- Each heat insulation section is provided with a door 15 a having heat insulation properties through a gasket 18. From the top, it is the refrigerating room rotary door 5, the switching room drawer door 19, the ice making room drawer door 20, the vegetable compartment drawer door 6, and the freezer compartment drawer door 7.
- the refrigerating compartment rotary door 5 is provided with a door pocket 21 as a storage space, and a plurality of storage shelves 22 are provided in the cabinet.
- the outer box 14 of the box body 1 is cut off from the back side of the top surface 23.
- the U-shaped bent outer shell panel 24, the bottom panel 25, the back panel 26, and the machine room panel 28 forming the recess 27 are assembled to ensure sealing performance.
- the assembled box body 1 has a recess 27 formed in a portion extending from the top surface 23 to the back surface 28a.
- the concave portion 27 protrudes toward the uppermost storage space 29a partitioned by the uppermost shelf 29 and the inner box 13 in the cabinet and the second shelf storage space 30a partitioned by the second shelf 30 and the uppermost shelf 29. I am on a business trip as part 30b. More preferably, the indoor side bottom wall surface 30c of the convex part 30b and the shelf bottom part 30d of the uppermost shelf 29 are set as substantially the same horizontal plane.
- the bottom panel 25 and the back panel 26 are provided with handles made of depressions that can be hooked with fingertips.
- the inner box 13 has a configuration in which the rear back part, which is slightly smaller than the outer box 14, is recessed inward, and the heat insulator 15 is foam-filled by being incorporated in the outer box 14. Is formed in the box body 1. Therefore, the left and right parts of the machine room panel 28 are also filled with the heat insulator 15 to form a heat insulation wall, and the strength is also ensured.
- the refrigeration cycle consists of the compressor 11 installed on the installation surface 28b of the recess 27, the discharge pipe 31 connected to the compressor 11, the top panel 23 and the side of the outer shell panel 24, and the condensation provided on the recess 27 and the bottom panel 25.
- An evaporator (not shown), a capillary 32 as a decompressor, a dryer (not shown) for removing moisture, and an evaporator 9 with an internal fan 8 located in the back of the vegetable compartment 3 and freezer compartment 4
- the suction pipe 33 is connected in a ring shape.
- the concave portion 27 is provided with a top cover 34 fixed with screws or the like.
- the compressor 11 and the machine room fan 34a, a condenser (not shown), a dryer (not shown) provided in the concave portion 27 are provided. (Not shown), part of the discharge pipe 31 and the suction pipe 33 are stored.
- the top of the top cover 34 is substantially flush with the top 23, and the top 34b of the compressor 11 is lower than the top 23.
- the capillary 32 and the suction pipe 33 are copper pipes of approximately the same length, and are soldered so as to allow heat exchange with the end portion remaining.
- the capillary 32 uses a small diameter steel pipe with large internal flow resistance for decompression, and the inside diameter is adjusted from 0.6mm to 1. Omm along with the length to design the amount of decompression.
- the suction pipe 33 has a large diameter to reduce pressure loss.
- the inner diameter of the copper tube is about 6mm to 8mm.
- the clearance 32 and the suction pipe 33 are arranged compactly by meandering the back of the refrigerator 2 so that the space between the inner box 13 and the back panel 26 is reduced.
- the capillary 32 and the suction pipe 33 are connected to the evaporator 9 with one end protruding from the vegetable compartment 3 rearward force of the inner box 13 and the other end connected to the edge of the installation surface 28b of the machine room panel 28.
- the notch portion force provided in FIG. 5 also protrudes upward and is connected to a dryer (not shown), a condenser (not shown), and the compressor 11.
- the suction pipe 33 and the discharge pipe 31 are provided with a U-turn part 36 in the vicinity of the connection part to the compressor 11 to provide connection flexibility, and are accommodated in the concave part 27. ing. Furthermore, with the aim of improving assembly workability and serviceability, in order to reduce the density of the pipes and to allow the rear force to see the pipe connections, the pipe connections are on the back side of the compressor 11.
- the compressor 11 is arranged on the left and right sides of the compressor 11.
- a mortar-shaped lower container 101 and a reverse mortar-shaped upper container 102 which are formed by deep drawing of a rolled steel plate with a thickness of 2mm and a force of 4mm, are engaged, and the engagement portion is welded all around A sealed container 103 is formed by bonding. Inside the hermetic container 103, refrigerant 104 and refrigeration oil 105 are stored at the bottom. A leg 106 is fixed to the lower side of the hermetic container 103, and the hole 109 of the elastic member 107 is allowed to play in the pin 108 provided in the concave portion 27 of the refrigerator via the elastic member 107 locked to the leg 106. The position is fixed by fitting.
- the leg 106 is elastically supported in the hermetic container 103 via a support portion 113a as a support member and a spring 114.
- the distance B between the vertical center of gravity A of the compressor 11 and the contact surface 106a of the compressor leg 106 and the elastic member 107 is determined by the vertical center of gravity A of the compressor 11 and the lower end surface of the support member. It is configured to be shorter than the distance C from 113b.
- the compressor in the case where the center of gravity A in the height direction of the compressor is above the contact surface 106a between the leg 106 of the compressor and the elastic member 107, the compressor The contact surface 106a between the leg 106 of the compressor and the elastic member 107 is located above the lower end surface 113b of the support member inside.
- the height of the elastic member 107 depends on the installation surface D in the recess of the compressor and the lowest end E of the compressor. Is greater than the distance F.
- the leg 106 has a fixing surface 106b that is fixed to the closed container, a bent portion 106c that rises upward, and an elastic member-disposed lower surface 106d that locks the elastic member.
- the fixing surface 106b and the bent portion 106c Ribs 106e extending across at least two of the elastic member disposing lower surface 106d are provided.
- the electric element 110 includes a rotor 111 and a salient pole concentrated winding stator 112.
- the compression element 113 is built above the electric element 110 and is driven by the electric element 110.
- Both the electric element 110 and the compression element 113 are housed in the hermetic container 103, and are elastically supported by the bottom part of the lower container 101 and the lower end of the stator 112 via the support part 113a as a support member and the spring 114. Yes.
- the support portion 113a and the spring 114 provided at the lower end of the stator 112 are support members that elastically support the mechanical portion.
- a terminal 115 constituting a part of the lower container 101 is for communicating electricity (not shown) inside and outside the sealed container 103, and supplies electricity to the electric element 110 through a lead wire 116.
- the sealed container 103 contains a discharge tube 120 for connection to the discharge pipe 31 of the refrigeration system, a suction tube 121 for connection to the suction pipe 33, and a refrigerant 104 in the refrigeration system, and then the system is closed.
- a sealing tube 122 is provided.
- the refrigerant 104 is sucked into the sealed container 103 through the suction pipe 33 and the suction tube 121 and discharged from the discharge tube 120 to the discharge pipe 31.
- the shaft 130 has a main shaft portion 131 to which the rotor 111 is fixed by press-fitting or shrink fitting, and an eccentric portion 132 formed eccentric to the main shaft portion 131.
- the cylinder block 133 has a substantially cylindrical compression chamber 134 and a bearing portion 135 for supporting the main shaft portion 131 of the shaft 130, and is formed above the electric element 110.
- a rotor recess 11 la is formed on the compression element side of the rotor 111.
- a bearing portion 135 extends into the trochanter recess 111a.
- the piston 136 is loosely fitted in the compression chamber 134, and is connected to the eccentric portion 132 of the shaft 130 by the connecting means 137.
- the rotational motion of the shaft 130 is converted into a reciprocating motion of the piston 136.
- the piston 136 expands and contracts the space of the compression chamber 134 to suck the refrigerant 104 in the sealed container 103 from the suction port 141 of the suction muffler 140, and a valve (not shown) provided inside the cylinder head 142. )
- the discharge muffler 143 Through the discharge muffler 143, the discharge pipe 144 and the discharge tube 120 formed in the cylinder block 133, and discharges to the discharge pipe 31 outside the sealed container 103.
- the discharge pipe 144 which is a high-pressure pipe, is a steel pipe with an inner diameter of 1.5 mm to 3. Omm, and is formed to be flexible using L-shaped or U-shaped bending.
- the discharge tube 120 of the container 103 is elastically connected.
- the rotor 111 includes a main body 150 in which silicon steel plates of 0.2 mm to 0.5 mm are stacked, a hole 152 for housing the permanent magnet 151 provided in the main body 150, and a hole 1 52 after the permanent magnet 151 is inserted. It is composed of an end plate 153 that closes the cover, and is integrally fixed by a forceps pin 154.
- the stator 112 is composed of a stator core 161 in which silicon steel sheets of 0.2 mm to 0.5 mm are stacked and a copper wire 162 which is a copper wire having an insulation coating of 0.3 mm to lmm.
- the stator core 161 has a salient pole portion 171 formed in an annular shape at a predetermined interval, and a salient wire 162 is wound around the salient pole portion 1701 (referred to as a salient pole concentrated winding). They are connected to one line with a connection line 172.
- the cross section of the induction motor is compared with the cross section of the induction motor on the left side and the cross section of the inverter motor on the right side with the center line as a boundary.
- Each electric motor is used in a compressor having almost the same maximum refrigerating capacity.
- the height L1 of the stator core 161 of the inverter motor stator 112 is significantly lower than the height HI of the stator core 181 of the induction motor stator 180.
- the height L4 of the rotor n ⁇ of the inverter motor is also lower than the height H4 of the rotor 182 of the induction motor.
- the coil end height L2 L3 where the wire 162 protrudes from the stator core 161 is significantly lower than the H2 H3 coil end height of the winding 183 of the induction motor. Further, by using rare earth magnets for the permanent magnet 151, the height L5 of the permanent magnet 151, the height L1 of the stator core 161 of the inverter motor, and the height L4 of the rotor 111 can be further reduced.
- Refrigeration room 2 is usually set at 15 ° C, with the lower limit being the temperature at which it will not freeze for refrigerated storage.
- the switching room 16 can be changed in temperature settings according to the user's settings, and can be set to the desired temperature range from the freezer temperature range to the refrigeration and vegetable room temperature ranges.
- the ice making chamber 17 is an independent ice storage chamber and is set at a relatively high temperature of 18 10 ° C! Speak.
- the vegetable room 3 is often set to 2 ° C 7 ° C, which is the same or slightly higher temperature as the refrigerator room 2.
- Freezer 4 is typically set for cold storage at a temperature set at 22 ° C-18 ° C, and may be set at lower temperatures, for example, at temperatures as low as 30 ° C. is there.
- Each chamber is divided by a heat insulating wall in order to efficiently maintain different temperature settings.
- the heat insulating wall is formed by foaming and filling the heat insulating body 15 between the inner box 13 and the outer box 14. It is formed.
- the heat insulator 15 has sufficient heat insulating performance and ensures the strength of the box body 1.
- the cooling operation is started and stopped by signals from a temperature sensor (not shown) and a control board (not shown) according to the set temperature in the cabinet.
- the compressor 11 discharges the high-temperature and high-pressure refrigerant 104.
- Discharged refrigerant 104 dissipates heat in a condenser (not shown) through a discharge pipe 31 to be condensed and liquefied, and is reduced in pressure by a capillary 32 to become a low-temperature and low-pressure liquid refrigerant.
- the refrigerant in the inside is evaporated and the low-temperature cold air subjected to heat exchange is distributed by a damper (not shown) to cool each chamber.
- the volume of the piston 136 that is sucked and discharged during one reciprocation in the compression chamber 134 is referred to as a cylinder volume, and the cooling capacity varies depending on the size of the cylinder volume.
- the compressor 11 supported by the elastic member 107 and the leg 106 is mounted in a recess 27 formed across the top surface 23 and the back surface 28a of the refrigerator.
- the depth (height) of the recess is at least the minimum gap between the bottom of the lower container 101 of the compressor 11 and the installation surface 28b, the height of the compressor 11, and the minimum gap between the upper container 102 and the top cover 34.
- the thickness of the top cover 34 is required. In order to avoid contact between the compressor 11 and the installation surface 28b or the top cover 34, a minimum clearance is required, and if the top surface cover 34 has a strength surface force and a minimum thickness, the depth of the recess (high Is determined by the height of the compressor 11.
- the convex portion 30b travels in the refrigerator cabinet due to the concave portion 27.
- the convex portion 30b is large, the storage property is deteriorated, and when the refrigerating chamber rotary door 5 is opened and the inside of the refrigerator compartment 2 is viewed, the protruding portion of the convex portion 30b makes the appearance worse. Therefore, a technique for reducing the height of the compressor 11 is required.
- the height of the compressor 11 will be specifically described.
- 2 mm to 4 mm steel plates are used for the lower container 101 and the upper container 102, and the total is about 7 mm.
- Each of the lower container 101 and the upper container 102 has a shape with a curvature in the vertical direction. This is because a specification with low noise is desired to make the living space where the refrigerator is installed comfortable.
- the radius of curvature is about RlOOmm and the radius is about R150mm. To get this curvature, a little over 13mm is needed on one side.
- refrigerating machine oil 105 is stored at the bottom of the sealed container 103.
- the refrigerating machine oil 105 is sealed in approximately 200 to 250 ml in order to guarantee the operation of the compressor 11 under various conditions, and occupies about 20 mm in height. Furthermore, if the refrigeration oil 105 and the electric element 110 come into contact with each other, the abnormal input increases. Is required.
- the plate thickness is 7 mm
- the curvature is 13 mm
- the curvature and oil are 20 mm
- the 9 mm necessary to secure the clearance is required to be 49 mm. It is not appropriate in terms of characteristics to reduce this dimension.
- the height of the compressor 11 is largely determined by the electric element 110 and the compression element 113.
- the compression element 113 is a force that can make the piston 136, the connecting means 137, the shaft 130, and the bearing portion 135 compact by reducing the cylinder volume, and the refrigeration capacity decreases as the cylinder volume decreases.
- the compression element 113 in order to obtain a large capacity with a small cylinder volume, the compression element 113 is made compact by operating at a rotational speed higher than the commercial power frequency (50 Hz or 60 Hz in Japan). More specifically, since the cylinder volume can be reduced by about 30%, the diameter of the piston 136 can be reduced, and the load acting on the shaft 130 can be reduced. Therefore, the length of the bearing portion 135 that supports the shaft load is also reduced. Therefore, it is possible to configure the electric element 110 close to the compression element 113. By making good use of the high rotation by the inverter, the inventor's design has made it possible to reduce the size from 5 mm to 10 mm.
- the setting of a plurality of rotation speeds of the electric element 110 by the inverter method necessarily includes a rotation speed corresponding to a frequency higher than the commercial power supply frequency (50 Hz or 60 Hz) in Japan. Toshina.
- the upper limit of the frequency that is determined does not exceed the commercial power supply frequency (not limited to Japan).
- the commercial power supply frequency not limited to Japan.
- an energy saving effect is expected, and a noise reduction effect is expected.
- the electric element 110 is necessary for operation of the compressor 11 in the induction motor unless the thickness HI and H4 of the stator 180 and the rotor 182 are large. Torque is not generated.
- the permanent magnet 151 is used for the rotor 111.
- the exciting current required for generating rotational torque is no longer required, so the thickness L1 of the stator 112 and the thickness L4 of the rotor 111 can be reduced, and the electric element 110 can be made compact. I can do it. More specifically, the induction motor has to pass a current to the rotor side (secondary side), and a force that requires a high thickness to obtain this exciting current. Since there is a magnet, no exciting current is required to generate torque, and the thickness can be reduced.
- the dimension of the winding wire 162 of the stator 112 of the electric element 110 that protrudes from the stator core 161 is larger than the protruding dimensions H2 and H3 of the winding wire 183 in the distribution cage. Since the winding line is concentrated and densely wound on each salient pole portion that does not extend between the separated slots, the rising of the winding line due to the winding line extending between the slots is eliminated. Therefore, as shown in L2 and L3, the size is significantly reduced, the overall height of the stator 112 is reduced, and the electric element 110 can be made more compact.
- the magnetic properties are excellent, such as a magnetic flux density of about 4 times and an energy product of about 10 times that of a general ferrite magnet. Even if it is small, sufficient characteristics can be obtained. Accordingly, the height L5 of the permanent magnet 151 and the height of the stator L1 can be further reduced, and the electric element 110 can be made more compact.
- a rotor recess 111a is formed on the compression element 113 side of the rotor 111, and a bearing portion 135 extends into the rotor recess 111a. Therefore, according to the present invention, the electric element 110 and the compression element 113 are placed on the projection surface in the height direction so as to overlap each other without shortening the length of the bearing portion 135, so that the electric element 110 The overall height of the machine part including the compression element 113 can be greatly reduced, and the height of the compressor can be further reduced without degrading the reliability of the compressor.
- the stacking force of the stator 1 80 is 2 mm
- the coil end height H2 of the winding 183, H3 is 25 mm
- the height of the rotor 182 is H4 is 65mm.
- the stator L 112 has a stack thickness L1 of 26 mm, and when a rare earth magnet is used, the lower L1 is 16 mm, and the coil end heights L2 and L3 of the stator wire 162 of the stator 112 are Using salient pole concentration rod, L2 and L3 are 9mm Become.
- the rotor 111 can be 35 mm thick and can be reduced to 20 mm by using rare earth magnets, and it can be reduced by up to 58 mm compared to a compressor using an induction motor.
- the rotor recess 11la is formed on the compression element 113 side of the rotor 111 at a depth of more than half of the rotor height direction, and the rotor recess 111a is formed in the rotor recess 111a. Since the bearing part 135 is extended, the thickness of the rotor 111 is reduced to 35 mm, and if a rare earth magnet is used, the height of the machine part is further reduced to about 10 mm, which is the extension allowance of the bearing part 135. Therefore, the total height of the machine part can be reduced by about 25mm.
- the compressor element 113 is located at the upper part as in the present embodiment, and the electric element 110 is located at the lower part thereof.
- the rotor is held only by the fixing force with the shaft. For this reason, for example, when an electric motor that obtains a magnetic force by flowing current through the rotor, such as an induction motor, the heat generated by the rotor 111 during operation increases and the shaft expands due to thermal expansion. Since there is a possibility that the rotor 111 falls off from 130, there is a possibility that the fixing allowance of the rotor 111 to the shaft 130 cannot be significantly shortened due to reliability problems.
- the fixing allowance can be significantly shortened. For example, even if the fixing allowance is reduced to about 6 mm, which is 20% or less of the total height of the rotor, the fixing force is sufficient, and the rotor 111 is removed from the shaft 130 due to heat generated during operation, vibration or impact due to transportation, etc. Increased reliability by increasing the sliding length of the shaft 130 and the bearing part 135 without causing any dropout.
- the height of the entire machine unit composed of the compression element 113 and the electric element 110 can be reduced while ensuring the fixing force between the rotor 111 and the shaft 130.
- the oil supply capability by the oil supply mechanism (not shown) provided in the shaft 130 can be improved.
- This is a lift that raises the refrigerator oil 105 up to the spiral groove for refueling the shaft 130 so that the distance between the lower end sliding between the bearing portion 135 and the shaft 130 and the refrigerator oil 105 is a spiral groove for oil supply of the shaft 130.
- the oil supply capacity to the sliding part between the shaft 130 and the bearing part 135 and the sliding part of the compression element 113 via the shaft 130 is improved, thereby improving the reliability. It is.
- this improvement in the oil supply capacity is achieved when the compressor 11 is operated at a lower speed by installing the inverter motor as in this embodiment, and the shaft is proportional to the decrease in the rotational speed. Decrease in the oil supply capacity when oil is supplied using the centrifugal force is a problem. However, by improving the oil supply capability in this manner, it is possible to stably supply the refrigerating machine oil 105 to the sliding portion even when the compressor 11 is operated at a lower speed.
- the fixing allowance between the rotor 111 and the shaft 130 is Compared to the 80% case, when 50%, the oil supply amount improved by about 5%, and a certain effect on the oil supply amount began to be obtained. In addition, when it was 30%, the amount of oil increased by about 10%, and when it was 15%, the amount of oil increased by about 15%.
- the head for raising the refrigeration machine oil 105 to the spiral groove for refueling is shortened, and the reliability of refueling is improved.
- an effect begins to be obtained.
- a constant effect margin can be obtained by setting it to 30% or less.
- the fixing allowance is further shortened and reduced to about 15%, the effect is further enhanced, but there are cases in which the reliability of the rotor holding starts to appear, and there is a case where sufficient confirmation is required before adoption. For this reason, it is desirable that the fixing allowance should not be less than 15% as much as possible.
- the electric element 110 of the compressor 11 is operated at a plurality of rotation speeds including at least a frequency higher than the commercial power supply frequency so that the top of the compressor 11 is lower than the top surface 23 of the box body 1.
- the compressor 11 can be made smaller, and the height of the recess 27 in which the compressor 11 is installed can be lowered.
- the storage capacity of the lower part of the refrigerator is improved, and the protrusion of the convex part 30b to the storage space side of the concave part 27 is made smaller to improve the appearance, and the storage space in the refrigerator is widened. Storability can also be greatly improved.
- a salient pole concentrated saddle type in which a plurality of salient pole parts 171 of a stator core 161 constituting the stator 112 of the compressor 11 are wound with a winding 162 through an insulator, or a permanent magnet.
- a rare earth magnet for 151 the compressor 11 can be further reduced, and the height of the recess 27 where the compressor 11 is installed can be reduced. For this reason, the storage capacity of the lower part of the refrigerator is improved, and the protrusion of the convex part 30b toward the storage space side of the concave part 27 is reduced to improve the appearance, and the storage space in the storage area becomes wider and the storage property is improved. Can be greatly improved.
- the compression element 113 includes the compression chamber 134 and the compression chamber 1 in particular.
- a reciprocating type equipped with a piston 136 that reciprocates within 34 is adopted, and a compression element 113 and an electric element 110 are inertially supported via a spring 114 with respect to 103 sealed containers.
- the reciprocating compressor is an internal low-pressure type, and the electric element 110 is disposed below the sealed container 103 and supports the support 113a, which is a support member for the sealed container 103, and the spring. Inertial support through 114. Further, the compression element 113 is disposed on the electric element 110 and connected to the sealed container 103 via a discharge pipe 144 that is a high-pressure pipe having an elastic shape. Since the compression element 113, which is the vibration source of the compressor, is arranged via the electric element part 110 with respect to the support member in the hermetic container 103, it is more elastically supported than when the compression element 1 13 is directly elastically supported. It is possible to increase the distance of the members.
- the vibration generated in the compression element 113 is attenuated when passing through the stator of the electric element 110 having high rigidity and then transmitted from the support member of the compressor to the outside of the compressor, so that the vibration of the compressor is reduced. be able to.
- the discharge pipe 144 which is a high-pressure pipe in the compression element 113, also has an elastic shape force, so that the vibration of the compression element 113 is attenuated by the discharge pipe 144 and then transmitted to the outside of the compressor. The vibration of the compressor can be further reduced.
- the leg 106 is elastically supported in the hermetic container 103 via a support portion 113a as a support member and a spring 114, and the vertical center of gravity A of the compressor and the leg 106 of the compressor are elastic.
- the distance B between the contact surface 106a and the member 107 is shorter than the distance C between the vertical center of gravity A of the compressor and the lower end surface 113b of the support member.
- the vibration amplitude of the compressor is Since the entire compressor vibrates around the center of gravity where the vicinity is the smallest and the vibration increases as it moves away from the center of gravity, the abutment between the elastic member 107 and the leg 106 close to the center of gravity than the lower surface of the support member that supports the machine part Since the vibration amplitude of the surface is reduced, the vibration transmission to the refrigerator can be further reduced.
- the permanent magnet 151 is used for the rotor 111, and the height of the rotor 111 is lowered, or the stator 112 is made a salient pole concentrated saddle to reduce the height of the stator 112.
- the center of gravity of the entire electric element 110 can be lowered.
- stator 112 When the stator 112 is a distributed winding, since the winding wire protrudes upward from the portion of the cylinder block 133 attached to the stator 112, the dimension of the leg portion of the cylinder block 133 is reduced. It was necessary to take more than the protruding dimension. However, by making the stator 112 into a salient pole concentrated saddle type, it is possible to shorten the leg of the cylinder block 133 that is the mounting part of the cylinder block 133 to the stator 112, and the center of gravity of the compression element is also low. can do.
- the cylinder block 133 can be lowered further and the center of gravity can be lowered.
- the center of gravity A of the mechanical portion inside the compressor is lowered, and the contact surface 106 between the leg 106 and the elastic member 107 provided in the hermetic container 103 outside the compressor is further increased.
- the distance B between the center of gravity A, the contact surface between the leg 106 and the elastic member 107 is further reduced, and the transmission of vibration to the compressor-powered refrigerator can be further reduced.
- the contact surface 106a between the leg of the compressor and the elastic member is provided on the support member. It is located above the lower end surface 113b.
- the vibration of the compressor is transmitted downward through the support member by directing the force downward from the mechanical part that is the vibration generation source, and then the direction changes upward and is transmitted to the elastic member 107 via the legs 106. . Therefore, since the vibration transmission path becomes complicated, the vibration is further damped in the transmission path, and the distance between the support member force compressor leg 106 and the contact surface 106a of the elastic member 107 can be increased. In particular, vibration transmission in the high frequency region is attenuated. In addition, since the amplitude of vibration of the contact surface 106a between the leg 106 and the elastic member 107 is reduced, vibration transmission to the refrigerator can be further reduced, and high-quality without unpleasant vibration or noise generation due to vibration is achieved.
- a refrigerator can be provided.
- the leg 106 has a fixing surface 106b that is fixed to the sealed container 103, a bent portion 106c that rises upward, and an elastic member arrangement lower surface 106d that locks the elastic member.
- the leg is positioned on the fixing surface 106b of the lower part of the sealed container 103 having good workability such as joining, and the surface on which the elastic member is arranged should be the lower surface of the elastic member arrangement closer to the center of gravity. It can be formed by simple leg bending and is very easy to manufacture.
- the fixing surface 106b of the leg 106 that is fixed to the sealed container 103 is lower than the lower end surface 113b that is the fixing surface of the support member 113a of the lower container 101.
- the vibration of the compression element 113 that is the vibration source of the compressor is farthest from the excitation source among the sealed containers 103 through the electric element 110 and also through the spring 114 supported by the support member 113a. Since the vibration is transmitted to the fixing surface of the support member 113a in the region, the vibration is greatly damped.
- the leg 106 extends from the fixing surface in a substantially horizontal direction, then rises vertically upward by the formation of the bent portion 106c, and then bends in the substantially horizontal direction again, and then the elastic member arrangement lower surface 106d is formed. Therefore, the vibration transmission path is complicated and long up to the contact surface 106a with the elastic member 107, and the vibration transmission is attenuated. Furthermore, since the elastic member 107 has a lower surface 106d closer to the center of gravity A in the vertical direction of the compressor and the elastic member 107 has a sufficient length, the elastic member 107 can sufficiently dampen vibration. As a result, vibration transmission to the refrigerator can be sufficiently reduced, and a high-quality refrigerator free from unpleasant vibration and noise caused by vibration can be provided.
- an elastic portion is formed from the surface of the leg 106 fixed to the sealed container 103. It is possible to increase the distance to the bottom surface of the elastic member where the material 107 is disposed, and the distance of vibration transmission from the fixing surface 106b is increased. Vibration transmission can be eliminated. Therefore, manufacture is easy and vibration transmission to the refrigerator can be reduced, and providing a high-quality refrigerator free from unpleasant vibration and noise caused by vibration can be achieved at low cost.
- the leg 106 With the bent portion 106c and the rib 106e extending over the elastic member disposition lower surface 106d, the leg 106 becomes more rigid and the eigenvalue of the leg 106 itself increases.
- the adhesion surface force of the sealed container 103 can further reduce vibration transmission to the elastic member and the refrigerator main body via the leg.
- the rib can be formed by an easy-to-manufacture press, and the strength of the leg is increased. Therefore, another problem that the leg is deformed by the transport impact of the refrigerator can be improved.
- the downsizing elements in the height direction of the compressor 11 can be broadly distinguished from the viewpoints corresponding to the electric element 110 and the viewpoints corresponding to the compression element 113.
- the power to employ both of these elements can be selected based on a balance between the height reduction requirement and other characteristics and quality.
- the compressor 11 is placed on the top of the refrigerator box body 1 so that the compressor 11 is closer to the user's ear. is there.
- a combination of miniaturization elements is essential so that miniaturization by reducing the height of the compressor 11 does not affect the noise and vibration of the refrigerator.
- the back of the top storage space 29a is a hard-to-reach place, and the convex 30b Even if the back side is blocked, the depth of use is shallow, and there are stored items such as food within reach, so you can prevent them from being left behind after the expiration date, and the usability is improved.
- the convex part 30b travels to the second stage storage space 30a side, the convex part 30b becomes noticeable when the refrigerating compartment revolving door 5 is opened. There is an inconvenience that it becomes difficult to put in or take out food during storage or removal.
- the appearance is almost continuously connected.
- the compressor 11 can also be accommodated in the predetermined recess 27 in a state in which the protrusion 30b is not felt and the appearance is good.
- the protruding part 30b does not feel the protrusion and the appearance is improved, and the storage items such as foods that are lower than the height of the front opening of the second stage storage space 30a can be smoothly put in and out. Disappears.
- the distance from the top surface 23 to the shelf bottom 30d of the uppermost storage space 29a is 25mm from the top surface 23 to the inside of the cabinet, and the uppermost storage space.
- the height of 29a is 140mm (because it is the uppermost part in the cabinet, the dimension is determined to be 140mm when taking out the standard product of a 350ml can beverage with a height of 123mm and a diameter of 66mm by tilting it and pulling it out.) If the shelf thickness is designed to be 10mm, it will be 175mm.
- Recess 27 Compressor 1 The installation surface 28b thickness of 1 is 20mm, the clearance between the compressor 11 and the installation surface 28b and the top cover 34 is 3mm each, and the top cover 34 is 2mm thick.
- the maximum height of the compressor 11 that can be stored in the recess 27 is 147 mm.
- the total thickness of the lower container 101 and the upper container 102 of the hermetic container 103 is 7 mm, and the height for obtaining the curvature of the upper container 102 is 7 mm. 14mm
- the upper part of the cylinder block 133 with the compression chamber 134 is 39 mm
- the dimension to the stator 112 mounting surface on the side with the bearing 135 is 20 mm
- the height of the stator 112 is 26 mm
- the lower end force of the stator 1 12 Rotation
- the dimension to the lower end of the child 111 is 9 mm
- the lower end force of the rotor 111 is 9 mm to the refrigerator oil 105
- the height of the refrigerator oil 105 is 20 mm.
- the total of these is 144 mm, which can be accommodated in the height space in the aforementioned recess 27 in the present embodiment.
- the height dimension of this type of compressor in a conventional standard capacity refrigerator is approximately 190 mm or more, the large height dimension can be reduced.
- the compression element 113 and the electric element 110 of the compressor 11 can be appropriately dimensioned.
- the compressor 11 can be accommodated in the predetermined recess 27 while maintaining rigidity for keeping the noise of the sealed container 103 well.
- the horizontal surface of the convex portion 30b which is the bottom wall surface on the indoor side of the concave portion 27, substantially the same horizontal surface, it is connected almost continuously in appearance, so that it does not feel the protrusion of the convex portion 30b and looks good.
- a refrigerator can be provided.
- the downsizing element in the height direction mainly for the improvement of the electric element 110, the problem of ensuring the reliability of the noise and the vibration surface due to the specification change of the compression element 113 is reduced.
- it can be an effective means for reducing the height while solving the problem of noise and vibration for a refrigerator in which the compressor 11 is arranged in the upper part of the refrigerator and noise and vibration are concerned.
- the ground height of the box body 1 that is, the height of the top surface 23 from the floor surface is set to 1800 mm or less. This height is set based on the maximum height that can be reached by a Japanese woman of standard height reaching up.
- the height of the top surface 23 from the floor surface is higher than 1800 mm, the height of the compressor 11 can be easily accommodated in the recess 27 without having to make the height dimension large and compact.
- the convenience at the top of the refrigerator becomes worse, and it balances the storage efficiency and usability of the entire refrigerator.
- the height of the top surface 23 from the floor surface is suppressed to 1800 mm or less.
- the maximum dimension of the compressor 11 in this height range is connected as much as possible to maximize the benefits of reducing the effective space inside the cabinet. It is possible to maximize the storage efficiency.
- FIG. 20 is a schematic cross-sectional view of the refrigerator in the fifth embodiment of the present invention.
- a ventilation duct 201 communicating with the recess 27 is provided immediately below the top surface 200 of the box body 1, and the compressor 11 is installed at a position lower than the top surface 200 higher than the lower surface 202 of the ventilation duct 201.
- the compressor 11 is installed on the installation surface 28b of the recess 27 so that the top 203 comes.
- a condenser 204 is disposed above the ventilation data 201, and the condenser 204 communicates with the discharge pipe 31.
- the top surface 200 of the ventilation duct 201 is configured in substantially the same horizontal plane as the top surface of the top cover 34 of the recess 27, or integrally formed. Further, the ventilation duct 201 sucks air from the intake 205, passes through the recess 204 in which the condenser 204 and the compressor 11 are installed, and exhausts the air from the discharge port 206 of the top cover 34! /.
- the top portion of the compressor 11 is disposed at a position higher than the lower surface 202 of the ventilation duct 201, which is lower than the top surface 200 of the box body 1. Therefore, the recess 2 for accommodating the compressor 11 is used.
- the projecting allowance to the inner side of 7, that is, the projecting allowance of the convex portion 30b is reduced, so that the space in the warehouse can be used more effectively.
- the height of the compressor 11 may be designed to fall within the height range in which the height of the ventilation duct 201 and the height of the recess 27 are combined. Therefore, for example, in a large refrigerator, even if various elements of miniaturization according to Embodiment 1 are incorporated, and a compressor having a relatively large size in terms of refrigeration capacity must be adopted, the design of The degree of freedom can be expanded, and even if it is a large refrigerator, it is easy to provide a refrigerator with high storage capacity in which the compressor 11 is stored behind the top surface.
- the ventilation duct 201 necessary for cooling the compressor 11 is arranged on the top surface 200, which is difficult to reach in the refrigerator, so that the vicinity of the top surface 200 can be effectively used for purposes other than storage. it can.
- the top 203 of the compressor 11 is arranged at a position higher than the lower surface 202 of the ventilation duct 201 which is lower than the top surface 200 of the box body 1, the top force of the compressor 11 is projected in the ventilation direction of the ventilation duct 201.
- the top portion 203 having the highest temperature in the compressor 11 is efficiently cooled, and the characteristics and reliability of the compressor 11 are also improved.
- the condenser 204 inside the ventilation duct 201 the heat dissipation effect of the condenser 204 is enhanced, and the efficiency of the system can be improved.
- the appearance of the protrusion 30b protrudes almost continuously.
- the compressor can also be accommodated in the predetermined recess 27 in a state in which it does not feel the appearance and looks good.
- this substantially the same horizontal plane is the case where the indoor side bottom wall surface 30c of the recess 27 and the shelf bottom 30d of the uppermost storage space 29a are substantially the same horizontal plane, or the indoor side bottom wall surface of the recess 27 In some cases, 30c and the upper side of the shelf, which is the lower end of the uppermost storage space 29a, have substantially the same horizontal plane.
- the distance from the shelf bottom 30d of the uppermost storage space 29a to the top surface 200 including the ventilation duct 201 and the top surface of the top cover 34 is The thickness of the top surface 200 forming the ventilation duct 201 is 2 mm, the inner height of the ventilation duct 201 is 18 mm, the insulation wall thickness between the lower surface 202 of the ventilation duct 201 and the interior is 25 mm, and the uppermost storage space 29a If the height is 125mm, the minimum height for 350ml canned beverages, and the shelf thickness is 10mm, the height is 180mm.
- the installation surface 28b of the compressor 11 is 20mm thick, the clearance between the compressor 11 and the installation surface 28b and the clearance between the top cover 34 and the inner surface of the top cover 34 are 3mm each, and the thickness of the top cover 34 is 2mm.
- the maximum height of the compressor 11 that can be accommodated within the height of the recess 27 and the ventilation duct 201 is With the compressor 11 of 152mm and the height of 144mm shown in the first embodiment, the housing design can be made sufficiently, and the compressor size can be increased to meet the demand for larger refrigerators. Easy configuration.
- the storage space that digs into the interior of the compressor 11 and the storage space at the top are harmonized in appearance, and are usually not easy to use.
- the uppermost storage space 29a is particularly badly used, unsuitable!
- the rear space is placed in the compressor housing recess 27, and several food items stored in the refrigerator are stored at a time in the relatively easy-to-use front space. Since canned drinks that are often used can be stored vertically, the number of storages in the entire refrigerator compartment increases, and the uppermost storage space 29a can be used effectively.
- the ventilation duct 201 communicating with the recess 27 is provided to be the top surface 200 of the box body 1, and the ventilation duct 201 in which the top 203 of the compressor 11 is lower than the top surface 200 of the box body 1.
- the ventilation duct 201 necessary for cooling the compressor 11 etc. is easily reachable because it is placed in the vicinity of the unusable top surface 200. The vicinity can be effectively used for purposes other than storage, and storage in the cabinet is also improved.
- the top 203 of the compressor 11 is arranged at a position higher than the lower surface 202 of the ventilation duct 201 which is lower than the top surface 200 of the box body 1, the top 203 having the highest temperature in the compressor 11 is efficiently cooled. Also, the characteristics and reliability of the compressor 11 are improved.
- FIG. 21 shows a schematic diagram of the refrigerator in the sixth embodiment of the present invention
- FIG. 22 is a solubility curve diagram of the refrigerant and the refrigerating machine oil in the same embodiment.
- the refrigerator main body 601 is provided with a refrigerator compartment 602, which is a relatively high temperature compartment, in the upper part, and a freezer compartment 604, which is a relatively low temperature compartment, in the lower part. Have it.
- the refrigerator compartment 602 and the freezer compartment 604 are configured to be insulated from the surroundings with a heat insulating material such as urethane.
- a heat insulation door not shown.
- Cold room 602 is usually set at 1 ° C to 5 ° C for refrigerated storage. It may be set at a slightly lower temperature, for example, 3 ° C to 0 ° C to improve freshness. In some cases, the stored item allows the user to freely switch the temperature setting as described above. In addition, a slightly higher temperature, for example around 10 ° C, may be set for the preservation of wine and root vegetables.
- Freezer 4 is typically set at temperatures between -22 ° C and -18 ° C for frozen storage. Set at a lower temperature, eg -30 ° C to -25 ° C, for improved freshness. Sometimes it is done.
- the machine room 611 is configured on the upper surface of the refrigerator body 601.
- the bottom surface of the machine room 611 is lower than the first top surface part 613 and the first top surface part 613 on the rear surface 614 side of the refrigerator outer box.
- the second top surface portion 615 provided in the step is formed in a step shape.
- the condenser 616 is disposed in the upper space portion of the first top surface portion 613
- the compressor 612 is disposed in the upper space portion of the second top surface portion 615, and is a resin covering the condenser 616 and the compressor 612.
- the machine room cover 617 which is a made-up cover, is fixed to the refrigerator body 1 with a screw or the like.
- the height relationship between the compressor 612 and the evaporator 609 is such that the compressor 612 is located on a part of the top surface of the refrigerator body 601. And the evaporator 609 is arranged in a part near the lower part. From the evaporator 609 to the compressor 61, The refrigerant return path in the refrigeration cycle to 2 has a relationship of having a considerable rising distance in the height direction.
- the refrigeration cycle 618 is formed of a series of refrigerant flow paths including a compressor 612, a condenser 616, a capillary 619 as a decompressor, and an evaporator 609 in this order.
- This compressor 612 is a reciprocating compressor that compresses refrigerant by reciprocating a piston in a cylinder.
- the machine room 611 is divided into a first top surface 613, a second top surface 615, and a machine room cover.
- the refrigerator body 601 has a refrigeration cycle 618 using a three-way valve or a switching valve.
- These functional parts may be disposed in the machine room 611 in some cases.
- the decompressor constituting the refrigeration cycle 18 is the capillary 619.
- the decompressor may be an electronic expansion valve that can freely control the flow rate of the refrigerant driven by the pulse motor.
- the cool air which has become a relatively low temperature due to the evaporation of the refrigerant in the evaporator 609, flows into the refrigerator compartment 602 and the freezer compartment 604, and cools the respective rooms. Is done.
- the refrigerant that has exchanged heat with the air in the cabinet passes through the suction line 620 and is sucked into the compressor 612 together with the refrigerating machine oil.
- the compressor 612 is provided on the top surface of the refrigerator body 1 as in the present embodiment. If the riser of the return path of the refrigerant from the evaporator 609 to the compressor 612 becomes large and the evaporator is arranged near the lower part of the refrigerator main body 601, the refrigerant from the compressor 612 At the same time, the refrigerating machine oil discharged into the refrigerating cycle 618 and staying in an accumulator (not shown) in the evaporator 609 is sent to the compressor 61 through the suction line 620. Returning to 2 is an important point related to the reliability of the compressor 612.
- the flow rate of the refrigerant can be increased by increasing the refrigeration capacity by increasing the cylinder volume of the compressor 612 or increasing the rotational speed of the compressor 612 in order to secure the refrigerant flow rate. If it is attempted to secure, the evaporation temperature of the evaporator 609 is lowered, the compression ratio of the compressor 612 is increased, and the power consumption is increased, so that it has been difficult to solve by these means.
- isobutane which is a hydrocarbon refrigerant, is used as the refrigerant of the refrigeration cycle 618.
- Table 1 shows the physical properties of isobutane and a conventional alternative chlorofluorocarbon refrigerant such as R134a in a saturated liquid at -30 ° C.
- isobutane has a refrigerating capacity per unit volume of about 1Z2 compared to R134a. Therefore, in order to make the refrigerating capacity of the compressor 612 equivalent to the conventional R134a, the cylinder volume of the compressor 12 is increased to about twice, and the piston displacement per unit time of the compressor 612 is also the same. It increases to about 2 times. That is, since the volume flow rate of refrigerant per unit time increases, the flow velocity in the pipe during the operation of the compressor 612 increases to about twice.
- the refrigerating capacity per unit volume of natural refrigerant CO is 11258.
- Butane has a refrigerating capacity per unit volume of approximately 1Z20 compared to CO. Therefore, pressure In order to make the refrigerating capacity of the compressor 12 equivalent to CO, the cylinder volume of the compressor 612 is about 20 times
- the piston displacement per unit time of the compressor 612 also increases to about 20 times as well. That is, since the volume flow rate of the refrigerant per unit time increases, the flow velocity in the pipe during the compressor 12 operation increases to about 20 times.
- the refrigerant staying in the evaporator 609 is compressed together with the refrigerant by the thermosiphon effect of the refrigerant when the evaporator 609 is defrosted by the action of a defrosting heater (not shown).
- a defrosting heater not shown.
- the compressor 612 is combined with the refrigerant if the solubility of the refrigerant in the refrigerating machine oil is small.
- Fig. 22 compares the solubility curves of the conventional case where, for example, R134a is combined with ester oil, and the case where the isobutane and mineral oil of the present embodiment are combined.
- the horizontal axis is the temperature of the refrigerant in the evaporator 609 (evaporation temperature), and the vertical axis is the solubility (mass%) of the refrigerant dissolved in the refrigeration oil.
- the solubility increases in any case as the evaporation temperature in the evaporator 609 increases, but the difference increases as the evaporation temperature increases.
- the defrosting of the evaporator 609 is performed until the evaporator 609 reaches about 10 ° C.
- the low-pressure type allows the amount of refrigerating machine oil discharged from the compressor 612 into the refrigerating cycle 618 to be suppressed, so that the absolute amount of refrigerating machine oil staying in the refrigerant piping related to the returnability of the refrigerating machine oil Can be reduced.
- the heat insulation performance of the refrigerator main body 601 has been improved by reducing the thermal conductivity of urethane constituting the refrigerator main body 601, and the application of a vacuum heat insulating material, etc., and the need to reduce the capacity of the compressor 612 has arisen.
- the combination of isobutane, mineral oil, and the internal low-pressure compressor 612 makes it easy to secure the necessary refrigerating machine oil in the compressor 612.
- a reciprocating compressor that compresses refrigerant by reciprocating the piston in the cylinder is used as the compressor!
- the clearance between the piston and the cylinder can be managed with relatively high accuracy. Therefore, sufficient sealing performance can be ensured without using a large amount of refrigerating machine oil to seal between the piston and the cylinder, and the refrigerating machine oil discharged together with the refrigerant discharged through the cylinder can be secured. Since the amount can also be reduced, the amount of refrigerating machine oil discharged from the compressor can be reduced, and damage to the compressor 12 due to a shortage of refrigerating machine oil in the compressor 12 can be further reduced.
- the compressor 612 and the evaporator 609 are kept away from each other when the compressor 612 is disposed above the evaporator 609.
- the compressor 612 is disposed on a part of the top surface of the refrigerator body 601 and the evaporator is disposed near the lower portion of the refrigerator body 601. Even when the rising distance of the return path of the refrigerant to the refrigerant increases, the reliability of the refrigerator can be sufficiently secured.
- the evaporator 609 can be provided in a storage room other than the uppermost storage room, and the compressor 612 is operated.
- Compressor 612 and condenser 616 which sometimes become hot, can also reduce the cooling loss of the evaporator 609 due to the exhaust heat effect of the high temperature section by moving away the evaporator 609, and cooling the evaporator 609 Power consumption can be reduced because the freezing capacity can be utilized to the maximum.
- FIG. 23 shows a schematic cross-sectional view of the refrigerator in the seventh embodiment of the present invention
- FIG. 24 shows a schematic rear view of the refrigerator in the same embodiment
- FIG. 25 shows schematic components of the refrigerator in the same embodiment
- FIG. 26 is a schematic perspective view of the main part of the suction pipe of the refrigerator in the same embodiment
- FIG. 27 is a schematic sectional view of a compressor mounted on the refrigerator in the same embodiment
- FIG. 29 shows a schematic cross-sectional view of the compressor transported state in the embodiment
- FIG. 29 shows a schematic cross-sectional view of the compressor when the refrigerator is transported in the embodiment.
- a heat insulating box 701 is a heat insulating body that foams and fills a space composed of an inner box 713 obtained by vacuum forming a resin body such as ABS and an outer box 714 using a metal material such as a pre-coated steel plate. It is equipped with a heat insulating wall.
- a heat insulator 715 for example, a hard urethane foam, phenol foam, styrene foam, or the like is used.
- the foam material it is even better to use a high-end carbon-based cyclopentane from the viewpoint of preventing global warming.
- the heat insulation box 701 is divided into a plurality of heat insulation sections, and has a structure in which the upper part is a revolving door type and the lower part is a drawer type. From the top, there are a refrigerator room 702, a drawer type switching room 716 and an ice making room 717 arranged side by side, a drawer type vegetable room 703 and a drawer type freezer room 704. Each heat insulation section is provided with a heat insulating door via a gasket 718. From the top, the refrigerating room has a revolving door 705, a switching room drawer door 719, an ice making room drawer door 720, a vegetable room drawer door 706, and a freezing room drawer door 707.
- a door pocket 721 is provided as a storage space in the refrigerating room rotary door 705, and a plurality of storage shelves 722 are provided in the warehouse.
- a storage case 723 is provided at the bottom of the refrigerator compartment 702.
- the outer box 714 of the heat insulating box body 701 includes a shell 724, a bottom panel 725, a rear panel 726, and a recess dent in the rear of the top surface, which is a U-bent steel plate cut from the top surface.
- the machine room panel 728 constituting the above is assembled and secured with a sealing property.
- the machine room panel 728 is formed by drawing steel sheets, and some of the corners are rounded to improve workability.
- This R shape of foam insulation 715 The flow path is improved by securing the flow path at the branching or merging section, and the generation of voids due to insufficient filling can be prevented.
- the machine room panel 728 has a flow path at the branching or merging portion of the heat insulating body 715 that is foam-filled even if the throttle is shallowly shaped toward the left and right ends where the arrangement portion of the compressor 711 is deepest. Secured and improved fluidity.
- the machine room panel 728 is provided with a plurality of air vent holes (not shown) on each surface, and can prevent the generation and deformation of voids due to residual air without impairing the appearance and the inside view. .
- the bottom panel 725 and the back panel 726 are provided with handles made of depressions that can be hooked with fingertips.
- the bottom handle 729 is located from the front to the center of the bottom, and is provided at two predetermined intervals so that the front force can be applied to the fingertip.
- the rear handle 730 is provided at a predetermined interval at two positions so that the fingertip can be applied upward as high as possible at the top of the rear panel 726.
- the inner box 713 has a configuration in which the rear rear part, which is slightly smaller than the outer box 714, is recessed inward, and by incorporating the inner box 713 into the outer box 714, there is a space in which the heat insulating body 715 is foam-filled. Insulated box 701 is formed. Therefore, the right and left portions of the machine room panel 728 are also filled with the heat insulating material 715 to form heat insulating walls, thereby ensuring strength. Furthermore, the bottom handle 729 and the back handle 730 are also secured by the foam-filled insulation 715.
- the compressor 711 elastically supported by the recess 27, the machine room fan 731 provided in the vicinity of the compressor 711, the top surface, the recess 727, and the bottom surface of the shell 724
- a condenser (not shown) provided at the bottom of the panel 725, the side surface of the shell 724, etc.
- a cabinet 732 as a pressure reducer
- a dryer (not shown) for removing moisture
- An evaporator 709 provided with a cooling fan 708 arranged in the vicinity on the back surface of the air pipe and an intake pipe 733 are connected in an annular shape.
- the recess 727 is provided with a top cover 734 fixed with screws or the like, and the compressor 711, condenser (not shown), machine room fan, dryer, piping, etc. provided in the recess 727 are provided. Is housed.
- the cable 732 and the suction pipe 733 are copper pipes of approximately the same length, and are soldered so as to be capable of heat exchange with the end portions remaining.
- CABILARI 732 uses a thin copper tube with a large internal flow resistance.
- the inner diameter is about 0.6 to 1. Omm, and the pressure reduction is designed by adjusting the length.
- the suction pipe 733 uses a large-diameter copper pipe to reduce pressure loss, and its inner diameter is designed to be around 6.94 mm and 7.94 mm.
- the meandering part comes to the back of the refrigerator compartment 702, and is arranged between the inner box 713 and the rear panel 726.
- One end of the carrier 732 and the suction pipe 733 are connected to the evaporator 709 with one end also protruding from the vegetable compartment 703 of the inner box 713 and connected to the evaporator 709. It protrudes upward from (not shown) and is connected to a driver (not shown), a condenser and a compressor 711 respectively.
- the suction pipe 733 is provided with an oil outflow prevention trap 736 in the vicinity of the connection portion with the compressor 711, and is housed in the recess 727.
- the pipe connection part of the compressor 11 faces the rear side in order to reduce the density of the pipes and make the pipe connection part visible from the rear. Are arranged on the left and right sides of the compressor.
- the suction pipe 733 has a lower downward force on the back side of the compressor 711 and is made to go straight with a slight upward slope to the side, and then is substantially higher in the vertical direction than the vertical center line of the compressor 711 and the compressor 71
- the rising portion is provided to a position lower than the height of 1.
- the suction pipe 733 is provided with an oil outflow prevention trap 736 composed of a pipe U-bending portion 737 provided in the forward direction of the heat insulating box 701 after the vertical startup, and the pipe U-bend.
- the tip is located on the front side of the heat insulation box from the center line in the plane of the compressor. Since the compressor 711 has a shape that has a curvature toward the top surface, if the pipe bending part 737 is formed above the compressor 711, there is a sufficient space, and it is possible to reduce the size without taking up an extra pipe storage space. Is possible.
- the pipe U-bending portion 737 the elasticity of the pipe can be provided, vibration propagation from the compressor 711 can be absorbed, stress concentration at the pipe fixing section can be prevented, and the risk of pipe breakage can be reduced.
- the suction pipe 733 is bent in a substantially vertical direction and embedded in the heat insulator 715 from the rear end of the machine room panel 728.
- the shell joint 740a which is an overlapped portion of a combination of a bowl-shaped lower shell 738 and an inverted bowl-shaped upper shell 739 formed by deep drawing a thick steel plate of 2mm to 4mm in thickness
- a rotary drive unit 742 and a compression unit 743 that are elastically supported by an elastic body 741 are provided inside a compressor shell 740 having a hermetically sealed structure, the periphery of which is welded.
- a suction pipe 733 with an open end inside the compressor shell 740 is connected to other equipment that constitutes the refrigeration cycle by a discharge pipe 744, and a predetermined amount of oil 745 and refrigerant (not shown) are enclosed. It has been.
- a support portion 746 for elastically supporting the heat insulating box 701 is attached to the lower portion of the lower shell 738.
- the support portion 746 is provided with a relief for securing the thickness of the elastic support member by one step.
- the rotation drive unit 742 includes a motor 747 and a bearing unit 748.
- the motor 747 includes a stator 749 having a hollow cylindrical electromagnetic coil that is applied with voltage and generates a rotational force between the permanent magnet and a permanent magnet that is located in a hollow portion inside the stator 749 and is opposed to each other with a minute gap.
- a rotor 750 having The bearing portion 748 has an eccentric shaft 751 at the end, the inside is hollow open at both ends, a shaft 752 having a spiral groove (not shown) in the periphery and an injection hole communicating with the inside, and the shaft 752 is rotatable. It is composed of 753 bearings that are held in
- the compression section 743 is swingably attached to a cylinder 755 provided with a cylinder head 754 having a valve mechanism (not shown) at the tip, a piston 756, a piston 756, and an eccentric shaft 751. It consists of a rod 757 that converts rotational motion into linear reciprocating motion.
- a discharge pipe 744 is connected to the cylinder head 754 via a valve mechanism so that the compressed refrigerant is discharged directly to the outside of the compressor shell 740.
- the suction part is opened inside the compressor shell 740 via a valve mechanism.
- a silencing muffler (not shown) is disposed between the suction path of the cylinder head 754 and the machine room shell 740 in the suction path.
- suction pipe 733 is disposed so that the opening end thereof is flush with the inner wall surface of the compressor shell 740, and the compressor 711 is downsized.
- the refrigerator compartment 702 is usually set at 1 ° C to 5 ° C with the lower limit of the freezing temperature for refrigerated storage.
- the storage case 723 is set at a relatively low temperature, for example, ⁇ 3 ° C. to 1 ° C. for improving the freshness of meat fish and the like.
- the temperature setting of the switching room 716 can be changed by a user setting, and can be set to a predetermined temperature from the freezer compartment temperature zone to the refrigeration and vegetable compartment temperature zones.
- the ice making room 717 is an independent ice storage room and is equipped with an automatic ice making device (not shown) to automatically produce and store ice. Power that is in the freezing temperature range for storing ice It can be set at a refrigerating temperature that is relatively higher than the freezing temperature range—18 ° C to ⁇ 10 ° C for the purpose of storing ice. is there.
- the vegetable room 703 is often set at 2 ° C to 7 ° C, which is the same or slightly higher temperature than the cold room 702. It is possible to maintain the freshness of leafy vegetables for a long period of time by lowering the temperature so that it does not freeze.
- the freezer compartment 704 is typically set at temperatures between -22 ° C and -18 ° C for frozen storage. Refrigerated to improve storage conditions, eg at low temperatures such as -30 ° C and -25 ° C. May be set
- Each chamber is partitioned by a heat insulating wall to efficiently maintain different temperature settings.
- Power can be foam-filled integrally with the heat insulator 15 as a method to improve the heat insulation performance at low cost. is there. About twice as much as using heat insulation material such as polystyrene foam Thermal insulation performance can be achieved, and the storage volume can be increased by thinning the partition.
- the cooling operation is started and stopped by signals from a temperature sensor (not shown) and a control board according to the set temperature in the chamber.
- a voltage is applied to the motor 747 of the rotary drive unit 742 from the terminal (not shown) through the electric wire inside the compressor 11.
- the compression operation of the refrigerant gas is performed in the compression unit 743. That is, when the piston 756 moves to the position farthest from the cylinder 755, the pressure in the cylinder 755 decreases, and the valve mechanism (not shown) of the suction portion provided in the cylinder head 754 is opened.
- the refrigerant gas in the compressor shell 740 is sucked into the cylinder 755 via a muffler muffler (not shown).
- the piston 756 moves to the position closest to the cylinder 755
- the sucked refrigerant gas is compressed to become high-temperature and high-pressure refrigerant gas, and the discharge force of the cylinder head 754 is also discharged through the valve mechanism.
- the discharged refrigerant gas is sent out of the compressor shell 740 through a discharge pipe 744 directly connected to the cylinder head 754.
- the compressor shell 740 has an internal low-pressure type structure in which low-pressure refrigerant gas exists, and the refrigerant gas that returns to the suction piping force is released into the compressor shell 740.
- oil 745 present in the bearing portion 748 and the compression portion 743 of the compressor 711 is secured by the oil 745.
- oil 745 and refrigerant gas have been selected as a compatible combination, a combination of Rl 34a and ester oil, which has a low ozone depletion potential, and a high-mouth carbon-based refrigerant that has a particularly low global warming potential and is good for environmental protection. HC600a and mineral oil.
- the oil 745 is enclosed in the compressor shell 740, and the amount of the oil 745 is determined so as to be stored in the lower part and to secure a predetermined oil surface height.
- Oil to sliding part 758 7 The supply of 45 is carried through the hollow interior of the shaft 752 by centrifugal force generated by the rotation of the shaft 752.
- the lower end of the shaft 752 is completely attached to the oil 745, and the oil 745 going up the shaft 52 from here is sprayed from the ejection holes (not shown) provided at positions corresponding to the respective parts of the sliding portion 758. It has been. Further, the spiral groove around the shaft 752 can sufficiently distribute the oil 745 to the sliding portion 758.
- the high-temperature and high-pressure refrigerant discharged by the operation of the compressor 711 as described above dissipates heat and condenses and liquefies in a condenser (not shown), and is reduced in pressure by the capillary 732 to be converted into a low-temperature and low-pressure liquid refrigerant.
- a condenser not shown
- the refrigerant exiting the evaporator 709 is sucked into the compressor 711 via the suction pipe 733.
- the suction pipe 733 is soldered to the capillary 732 so as to be able to exchange heat, and is embedded in the heat insulator 715, so that heat is transferred from the low-temperature suction pipe 733 to the high-temperature capillary 732 without escaping from the surroundings.
- Capillary 732 is cooled during the decompression process of the refrigerant, the specific enthalpy is lowered and the refrigeration effect is increased.
- the temperature of the refrigerant rises, and at the outlet portion, it can be made substantially equal to or higher than the ambient temperature.
- the refrigeration cycle that generates the refrigeration temperature is a very low refrigerant temperature of 20 ° C or less in the evaporator 709, so the effect of reducing heat loss is particularly great.
- the capillaries 732 and the suction pipe 733 are placed on the back of the refrigerator compartment 702, which has a high internal temperature, it is possible to ensure energy savings without significantly increasing heat loss and heat load on the internal storage. is there.
- the heat exchanger 735 has a sufficient length, and is stored in a compact manner by meandering the back of the refrigerator compartment 2 to save energy and increase the temperature of the intake pipe 733.
- the meandering part has an ascending gradient and has no traps, so liquid refrigerant can be used to reduce pressure loss that prevents refrigerating machine oil from accumulating. Does not cause any performance impact.
- refrigerators When the refrigerator is delivered to the customer, it must be transported in a sideways manner! /, Tsuteyo! /, So there are handles on the bottom and upper back.
- refrigerators are often laid down and transported just before the power is turned on, such as moving or changing the pattern just during delivery.
- the refrigerator can be transported with the door surface facing upward, and the door will be opened unexpectedly during transport, making it difficult to transport, and the internal parts and stored items will not fall. Which problem can be prevented.
- the inside of the compressor 711 provided in the concave portion 727 of the top surface is such that the open end of the suction pipe 733 opened in the compressor shell 740 is in the oil 745 as shown in FIG.
- the suction pipe 733 can flow out of the backflow.
- the oil spill prevention trap 736 consisting of the pipe U-bending part 737 is configured to rise upward with respect to the staying surface of the oil 745 during transportation, the oil 745 flows into the suction pipe 733 and the evaporator 709. There is nothing to do.
- the oil 745 in the oil spill prevention trap 73 6 returns to the compressor shell 740 by gravity and does not leave the suction pipe 733 closed with the oil 745.
- the condenser in order to minimize the drip in the chamber of the recess 727, the condenser was made thin and the top surface was Alternatively, as a box-shaped configuration, the compressor 711 and the machine room fan 731 may be arranged in parallel in the recess 727 in order to secure the internal volume in the vertical direction.
- the condenser has a fin tube type, a wire tube type, a spiral fin tube type, etc., and the heat radiation capacity is increased by increasing the outer surface area, it will be effective in reducing the size of the condenser and increasing energy consumption.
- the condenser may be a natural air cooling type composed of copper piping with good heat transfer inside the outer box 723 that is only forced air cooling type, or between the insulated door bodies in each room. You can combine copper piping to prevent drip-proofing by placing it in the partition.
- flow control means such as an electric three-way valve and an electric expansion valve
- multiple evaporators can be used according to the compartment configuration and temperature setting configuration, multiple capillaries can be switched, It is possible to further reduce energy consumption by controlling the pressure or cutting the gas while the compressor 711 is stopped.
- flow path control means in the recessed portion 727 on the top surface of the heat insulating box body 701, it is possible to reduce the heat load on the inside of the cabinet, and further, there is an energy saving effect.
- the rear handle 730 for carrying the refrigerator is provided below the recessed portion 727 where it is easy to secure the strength. If the rear handle 730 is provided at both sides of the control board at the same position, The space can be arranged efficiently and the internal volume can be increased. In addition, if the rear handle 730 is provided by distributing it to the left and right above the top cover 734, the installation space of the compressor 711 can be escaped, and the handle shape can be configured. This is an easy-to-hold effect. By providing the bottom handle 729 at the front end of the bottom surface as well, the corner portion can be gripped and the ease of holding can be improved.
- the recessed portion 727 of the heat insulation box 701 is a force shell in which the left and right wall surfaces are made of heat insulation 715. If the side surface is configured only by 724, the heat dissipation of the compressor 711 is improved, and further, a large part space can be provided for the recess 727.
- the compressor 711 is provided with a recess 727 at the rear of the top surface of the heat insulating box 701.
- the top surface of the heat insulating box 701 is substantially provided with no recesses or the like.
- the compressor 711 is located below the compressor 711. Prevent oil from flowing into the intake pipe 733 and the evaporator 709. Therefore, the amount of oil in the compressor 711 can be secured and the oil surface height can be prevented from being greatly reduced, the oil supply to the sliding part of the compressor 711 can be secured, and the risk of damage to the compressor 7 11 etc. Can be reduced.
- FIG. 30 is a schematic cross-sectional view of the compressor mounted on the refrigerator in the eighth embodiment of the present invention
- FIG. 31 is a top view of the interior of the compressor mounted on the refrigerator in the eighth embodiment of the present invention. It is.
- the suction pipe 800 inside the compressor 100 is installed on the same plane as the inside of the shell so as not to extend into the compressor of the lower shell 801, and the suction port 802a of the suction muffler 802 and Arranged in close proximity to each other! /
- the electric element 803 having the rotor 803a and the stator 803b is elastically supported by the lower shell 801 via a support portion 805 having an elastic member.
- the compression element 804 is arranged.
- a refrigerant in a refrigeration cycle that includes a compressor 100, a condenser (not shown), a decompressor (not shown), and an evaporator (not shown) in this order to form a series of refrigerant channels.
- R600a is enclosed in the compressor 100, and an oil 810 made of mineral oil having a high mutual solubility with respect to R600a is enclosed in the compressor 100.
- the compression element 804 is formed with a contact portion 820 having a certain clearance from the upper shell (not shown) or the lower shell 801.
- the shaft 840 has a main shaft portion 841 to which the rotor 803a is fixed by press-fitting or shrink fitting, and an eccentric portion 842 formed eccentric to the main shaft portion 841.
- the cylinder block 850 has a substantially cylindrical compression chamber 851 and a bearing portion 843 for supporting the main shaft portion 841 of the shaft 840, and is formed above the electric element 803.
- the rotor recess 803c is formed on the compression element 804 side of the rotor 803a, and the bearing 843 extends into the rotor recess 803c, so that the compression element 804 is electrically connected to the motor element.
- the miniaturization is realized by inserting into the height range of the 803 rotor.
- the piston 860 is loosely fitted in the compression chamber 851, and is connected to the eccentric portion 841 of the shaft 840 by the connecting means 861, and converts the rotational motion of the shaft 840 into the reciprocating motion of the piston 860.
- the piston 860 expands and contracts the space of the compression chamber 851 to suck the refrigerant in the shell from the suction port 802a of the suction muffler 8002, and through a valve (not shown) provided inside the cylinder head 852. Then, the gas is discharged to the discharge pipe 831 outside the shell through the discharge muffler 853 formed in the cylinder block 850, the discharge pipe 854, and the discharge tube 870.
- the discharge pipe 854 which is a high-pressure pipe, is a steel pipe with an inner diameter of 1.5 mm to 3. Omm, and is formed to be flexible using L-shaped or U-shaped bending.
- the discharge tube 870 is connected elastically.
- an inverter motor using a permanent magnet for the rotor 803a is used as the electric element 803.
- torque required for operation of the compressor 100 is not generated unless the stator 803b and the rotor 803a are thick.
- an inverter motor that uses permanent magnets for the rotor 803a the exciting current necessary for generating the rotating torque is no longer needed, so the stator 803b and rotor 8 03a have a low thickness.
- the electric element 803 can be made compact.
- the eccentric motion of the shaft 840 is converted into a reciprocating motion by the connecting means 861 connected to the eccentric portion 842, and becomes a reciprocating motion of the piston 860 connected to the other end of the connecting means 861, and the piston 860 is connected to the compression chamber 851.
- the refrigerant is sucked and compressed while changing the internal volume.
- the volume of the piston 860 that is sucked and discharged during one reciprocation in the compression chamber 851 is referred to as a cylinder volume, and the cooling capacity varies depending on the size of the cylinder volume.
- the R600a becomes liquid and becomes a liquid cooling medium 890, and is stored on top of the oil 810, which is a mineral oil having a higher specific gravity than the liquefied R600a. Is done.
- the oil 810 which is a mineral oil having a higher specific gravity than the liquefied R600a.
- a general-purpose refrigerant in which the liquid refrigerant is stored in the upper part of the oil in a state where the refrigerant is in a liquid state a combination of a CO refrigerant and ester oil or ether oil is the same.
- the lower shell is tilted when the compressor 100 is tilted.
- the oil 810 stored in the lower part of the suction pipe 800 that is open on the same plane as the inner wall of the 801 reaches the oil 810, it easily flows out of the shell, reducing the oil 810 inside the shell. The oil level will decrease.
- the present invention uses R600a, which is a refrigerant whose refrigerating capacity per unit volume is as small as about 1Z2 compared to R134a and about 1Z20 compared to CO. Yes.
- R600a is a refrigerant whose refrigerating capacity per unit volume is as small as about 1Z2 compared to R134a and about 1Z20 compared to CO.
- the surplus amount also increases in proportion to the increase in cylinder volume.
- the volume flow rate of the refrigerant per unit time increases, so that the flow velocity in the piping when the refrigerant passes through the refrigeration system is about twice as high as the flow rate 134a and about 20 times that of CO. So frozen
- the oil 810 staying in the system can be quickly returned to the compressor 100, and the shortage of oil in the shell can be prevented.
- the compressor 100 of the present embodiment achieves downsizing in the height direction of the compressor, and the total height of the conventional general small compressor is 190 mn! With respect to ⁇ 200 mm, the compressor 100 of the present embodiment is downsized in the height direction to about 145 mm.
- the oil level height of the amount of oil sealed inside the compressor is a general conventional small size.
- the oil level of the oil was about 12% to 13% of the total height of the conventional compressor because about 30mm, which is equivalent to the compressor, was secured.
- the oil oil level with respect to the total height of the compressor has increased to about 17%, and the oil spill when the compressor is tilted is a greater problem. It became.
- the compressor 100 of the present embodiment can be downsized to reduce the size of the compressor by reducing the height of the compression element 804 and the electric element 803! / ⁇ The
- the compression element 804 and the electric element are supported without elastically supporting the mechanical part composed of the compression element 804 and the electric element 803 as the element for reducing the height.
- the oil 810 does not buffer with the electric element 803 of the machine part, and the oil level is less likely to fluctuate!
- the oil 100 is particularly important among the elements and viewpoints for downsizing. It adopts a combination of the above-mentioned miniaturization elements that are not intended to promote spillage, in other words, to maintain the reliability associated with oil spill suppression.
- the height from the top of the oil level of oil 810 to the opening of suction pipe 800 is also controlled by ensuring a dimensional relationship that is equal to or greater than that of conventional compressors. can do.
- the opening position of the suction pipe 800 to the shell is located above the 1Z2 height with respect to the maximum height in the shell, thereby increasing the effect of preventing oil spillage when the compressor 100 is tilted. be able to.
- the compression element 804 is formed with the upper shell (not shown) or the lower shell 801 and the contact portion 820 having a certain gap, so that the compressor is inclined.
- the contact portion 820 and the upper shell or the lower shell 801 are in contact with each other, so that the mechanical portion composed of the large compression element 804 and the electric element 803 is not greatly inclined. Therefore, it is possible to prevent the mechanical part from compressing the volume of the oil moved to the inclined side and to secure a space part, so that the oil 808 can be prevented from easily flowing out from the suction pipe.
- FIG. 32 shows a schematic cross-sectional view of the compressor mounted on the refrigerator in the ninth embodiment of the present invention.
- the suction pipe 906 extends into the shell and is a direct suction type joined to the suction muffler 939 via a spring 906a, which is an elastic member, and inside the suction muffler 939. It passes into the cylinder 936 via a spatial path. Further, the inside of the shell of the suction pipe 906 has a bent portion facing upward, and the shell is opened upward by force and is connected to a spring 906a which is an elastic member.
- the suction muffler 939 is connected to the cylinder head 935, and the cylinder 936 is disposed in the same direction as the cylinder head 935. Further, the suction pipe 906 is also arranged in the same direction so as to be connected to the suction muffler 939.
- the discharge pipe 907 reduces pressure pulsation. In order to increase the elasticity of the pipe, it is attached to the lower shell on the opposite side of the cylinder head with a predetermined pipe length. By configuring the suction pipe 906 and the discharge pipe 907 on the opposite side, a compact compressor 900 can be configured.
- the clearance of the cylinder 936 is not limited to the valve clearance of the cylinder head 935, or the oil 908 return hole provided in the suction muffler 939 (not shown). )), And the backflow outflow of oil 908 does not occur.
- the joint between the suction pipe 906 and the suction muffler 939 is composed of a closely wound spring, the transmission of compression vibration is reduced, and the oil 908 can also reduce the outflow from the spring gap due to viscosity. Therefore, it is possible to reduce the backflow of the oil 908.
- an elastic member for connecting the suction pipe 906 and the suction muffler 939 it is also possible to use an elastic resin such as a force rubber using a spring in this embodiment.
- the refrigerator according to the present invention can be used effectively and conveniently, the refrigerator can be applied to equipment using a cooling device such as a home or business refrigerator.
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Abstract
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CN2005800352809A CN101040120B (zh) | 2004-10-14 | 2005-10-14 | 压缩机、冷冻装置以及冷藏库 |
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JP2004-299895 | 2004-10-14 | ||
JP2004299895 | 2004-10-14 | ||
JP2004349354 | 2004-12-02 | ||
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JP2005-269622 | 2005-09-16 | ||
JP2005269622A JP2006183655A (ja) | 2004-10-14 | 2005-09-16 | 圧縮機および冷凍装置および冷蔵庫 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010080984A2 (en) | 2009-01-09 | 2010-07-15 | Emerson Climate Technologies, Inc. | Compressor having terminal plug assembly |
WO2011023810A1 (en) * | 2009-08-31 | 2011-03-03 | Arcelik Anonim Sirketi | Variable capacity hermetic compressor |
CN114673650A (zh) * | 2022-03-31 | 2022-06-28 | 江苏氢枫能源装备有限公司 | 一种加氢站氢气压缩机冷却装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5315178B2 (ja) * | 2009-09-08 | 2013-10-16 | 日立アプライアンス株式会社 | 密閉形圧縮機及びこれを用いた冷蔵庫 |
JP6653188B2 (ja) * | 2016-03-01 | 2020-02-26 | 日立グローバルライフソリューションズ株式会社 | 密閉型圧縮機およびこれを備えた冷蔵庫並びに自動販売機 |
JP6554049B2 (ja) * | 2016-03-01 | 2019-07-31 | 日立グローバルライフソリューションズ株式会社 | 冷蔵庫 |
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JPH04110376U (ja) * | 1991-03-08 | 1992-09-24 | 三洋電機株式会社 | 貯蔵庫 |
JPH062661A (ja) * | 1992-06-16 | 1994-01-11 | Matsushita Refrig Co Ltd | 密閉型圧縮機 |
JP2000134882A (ja) * | 1998-10-21 | 2000-05-12 | Matsushita Electric Ind Co Ltd | 永久磁石モータのロータ及びそれを搭載したコンプレッサ |
JP2004052730A (ja) * | 2002-07-24 | 2004-02-19 | Matsushita Electric Ind Co Ltd | 密閉型電動圧縮機 |
JP2004245073A (ja) * | 2003-02-12 | 2004-09-02 | Matsushita Electric Ind Co Ltd | 電動圧縮機 |
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JPS6159887U (ja) * | 1984-09-26 | 1986-04-22 |
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- 2005-10-14 WO PCT/JP2005/018919 patent/WO2006041147A1/ja active Application Filing
Patent Citations (5)
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JPH04110376U (ja) * | 1991-03-08 | 1992-09-24 | 三洋電機株式会社 | 貯蔵庫 |
JPH062661A (ja) * | 1992-06-16 | 1994-01-11 | Matsushita Refrig Co Ltd | 密閉型圧縮機 |
JP2000134882A (ja) * | 1998-10-21 | 2000-05-12 | Matsushita Electric Ind Co Ltd | 永久磁石モータのロータ及びそれを搭載したコンプレッサ |
JP2004052730A (ja) * | 2002-07-24 | 2004-02-19 | Matsushita Electric Ind Co Ltd | 密閉型電動圧縮機 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010080984A2 (en) | 2009-01-09 | 2010-07-15 | Emerson Climate Technologies, Inc. | Compressor having terminal plug assembly |
EP2307731A2 (en) * | 2009-01-09 | 2011-04-13 | Emerson Climate Technologies, Inc. | Compressor having terminal plug assembly |
EP2307731A4 (en) * | 2009-01-09 | 2012-03-28 | Emerson Climate Technologies | COMPRESSOR HAVING A PLUG-IN TERMINAL ASSEMBLY |
US9331420B2 (en) | 2009-01-09 | 2016-05-03 | Emerson Climate Technologies, Inc. | Compressor having terminal plug assembly |
WO2011023810A1 (en) * | 2009-08-31 | 2011-03-03 | Arcelik Anonim Sirketi | Variable capacity hermetic compressor |
CN114673650A (zh) * | 2022-03-31 | 2022-06-28 | 江苏氢枫能源装备有限公司 | 一种加氢站氢气压缩机冷却装置 |
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