EP3757482A1 - Compressor and household appliance - Google Patents
Compressor and household appliance Download PDFInfo
- Publication number
- EP3757482A1 EP3757482A1 EP20179067.2A EP20179067A EP3757482A1 EP 3757482 A1 EP3757482 A1 EP 3757482A1 EP 20179067 A EP20179067 A EP 20179067A EP 3757482 A1 EP3757482 A1 EP 3757482A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- accumulator
- filter
- refrigerant
- backing pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 47
- 239000007791 liquid phase Substances 0.000 claims abstract description 43
- 239000007792 gaseous phase Substances 0.000 claims abstract description 33
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
- F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/18—Optimization, e.g. high integration of refrigeration components
Definitions
- the present invention relates to a compressor for a household appliance and to a household appliance with such a compressor.
- Household appliances like refrigerators, heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers comprise a compressor for compressing a gaseous phase of a refrigerant.
- a compressor for compressing a gaseous phase of a refrigerant.
- an accumulator can be provided for storing a liquid phase of the refrigerant. The accumulator can be placed outside a compressor housing of the compressor.
- a compressor for a household appliance comprises a compressor housing, wherein the compressor housing receives a compression chamber for compressing a gaseous phase of a refrigerant, and an accumulator for storing a liquid phase of the refrigerant, wherein the accumulator is provided inside the compressor housing.
- the accumulator Due to the fact that the accumulator is provided inside the compressor housing, an external accumulator can be avoided. In this way, additional available space around the compressor can be obtained. This improves the space requirements for the compressor which is of significant importance in some applications like heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers. Furthermore, the compressor can be produced at lower costs. The cost reduction comes from the fact that when assembling the compressor housing, the accumulator can be integrated into the compressor during assembly of the compressor housing.
- the compressor is able to compress the gaseous phase.
- the compressor preferably is a rotary compressor or can be named rotary compressor.
- a "refrigerant" is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle. In most cycles it undergoes phase transitions from a liquid to a gas and back again. The gaseous phase can be transferred into the liquid phase and vice versa.
- the gaseous phase can be named gaseous refrigerant.
- the liquid phase can be named liquid refrigerant.
- the compressor housing preferably has a cylindric shape with an outer wall, a bottom cap and a top cap.
- the caps hermetically close the outer wall at its ends.
- the compressor housing can be made of steel.
- the outer wall can be rotation-symmetric to a centerline.
- the centerline is preferably arranged horizontally so that also the compressor housing is arranged horizontally.
- the compressor can also be arranged vertically.
- the accumulator uses the bottom cap and part of the outer wall as outer shell. In particular, the accumulator is arranged inside the compressor housing.
- the centerline can be arranged horizontally or vertically. In other words, the compressor can be a horizontal compressor or a vertical compressor.
- the compressor housing encloses the accumulator and an internal volume which receives the compression chamber, wherein the accumulator comprises a separation wall which separates the accumulator from the internal volume.
- the separation wall prevents the refrigerant from entering the internal volume of the compressor itself.
- the separation wall can be a steel membrane.
- a "membrane” is a metal sheet that hermetically seals the compressor from the internal volume. Neither gas nor liquid can pass through the membrane.
- the membrane can be a steel sheet.
- the compressor can have a plurality of compressor parts that are necessary to compress the gaseous phase of the refrigerant.
- the compressor parts can include an electro motor, a steering system, valves, pipes, a discharge port, a piston or pistons, a muffler, a cylinder or the like.
- the compressor parts are also arranged inside the internal volume.
- the accumulator is provided between the separation wall and a bottom cap of the compressor housing, wherein the bottom cap has an inlet for taking in the gaseous phase and the liquid phase of the refrigerant.
- the inlet can be a pipe that is arranged horizontally or radially to the cylindrical compressor housing.
- the accumulator comprises a filter which is arranged downstream the inlet and inside the compressor housing.
- Both, the gaseous phase and the liquid phase pass through the filter when entering the accumulator.
- the filter is suitable of removing particles form the liquid phase.
- the filter is cylindrical, wherein the filter is plugged on the inlet.
- the filter is replaceable.
- the filter is plate-shaped, wherein the filter is attached to an end of the inlet.
- the filter is attached to an end of the inlet that protrudes inside the compressor housing.
- the filter can have a circular shape.
- the inlet comprises an expansion, wherein the filter is attached to an end of the expansion.
- the expansion increases a diameter of the inlet so that the filter has a bigger cross-sectional area. Filtration can be improved in that way.
- the filter is plate-shaped, wherein the filter is attached to the compressor housing.
- the filter can be attached to the separation wall, the bottom cap and the outer wall of the compressor housing.
- the filter comprises a mesh.
- the filter comprises a metal mesh or a polymer mesh.
- the accumulator comprises a backing pipe for holding back the liquid phase of the refrigerant in the accumulator.
- the backing pipe retains the liquid phase in the accumulator until it evaporates.
- the backing pipe allows the gaseous phase to leave the accumulator. In this way, the backing pipe is used for separating the liquid phase from the gaseous phase of the refrigerant.
- the backing pipe has a bore through which oil for lubricating movable parts of the compressor can pass.
- the accumulator comprises a cover which covers the backing pipe for preventing the liquid phase of the refrigerant from entering the backing pipe and allowing the gaseous phase of the refrigerant to enter the backing pipe.
- the cover is optional.
- the cover is only used in design cases of the compressor in which the liquid phase of the refrigerant could directly flow from the inlet into the backing pipe.
- the cover can be a steel plate.
- the cover is arranged with a distance from an upper end of the backing pipe so that the gaseous phase can enter the backing pipe. The cover prevents the liquid phase leaving the inlet from directly going into the backing pipe.
- the backing pipe is connected to a suction port of the compressor.
- the suction port can be an internal suction port or an external suction port.
- Internal means that the suction port is arranged inside the compressor housing.
- External means that the suction port is arranged outside the compressor housing.
- the backing pipe is arranged inside the compressor housing, wherein the backing pipe is guided through the separation wall by means of an outlet of the accumulator, and wherein the outlet is connected to the suction port inside the compressor housing.
- the suction port is an internal suction port.
- the outlet can be a pipe that is guided through the separation wall.
- the backing pipe is arranged at least partly outside the compressor housing, wherein the backing pipe is guided through the compressor housing, and wherein the backing pipe is connected to the suction port outside the compressor housing.
- the suction port is an external suction port.
- the backing pipe is guided through the compressor housing to the outside.
- a household appliance comprising such a compressor is provided.
- the household appliance can be a laundry dryer, a dishwasher, a refrigerator, a deep freezer or the like.
- the compressor can be part of a heat pump.
- the household appliance can be a heat pump dryer, a heat pump washer, a heat pump washer-dryer or a heat pump dishwasher.
- Fig. 1 shows a schematic perspective view of one embodiment of a household appliance 1.
- the household appliance 1 can be a laundry dryer, a dishwasher, a refrigerator, a deep freezer or the like.
- the household appliance 1 has a housing 2 comprising a bottom 3, a ceiling 4 which is arranged opposite the bottom 3, two opposing side walls 5, 6 and a back wall 7.
- the housing 2 is cuboid-shaped.
- the housing 2 has a front wall 8 which opposes the back wall 7.
- a door 9 is provided at the front wall 8 which can be opened to put laundry or other items into the household appliance 1.
- the household appliance 1 is a front loader.
- the door 9 can also be provided at the ceiling 4.
- the household appliance 1 is a top loader.
- Fig. 2 shows a cross-sectional view of one embodiment of a compressor 10 for the household appliance 1.
- Fig. 3 shows an enlarged view of the compressor 10 according to the view III of Fig. 2 .
- Fig. 4 shows a further cross-sectional view of the compressor 10 according to the intersection line IV-IV of Fig. 2 .
- Fig. 5 shows a further cross-sectional view of the compressor 10 according to the intersection line V-V of Fig. 4 .
- Figs. 2 to 5 are referred to at the same time.
- the compressor 10 is part of a heat pump.
- the compressor 10 is a rotary compressor.
- the compressor 10 is a horizontal rotary compressor.
- the compressor 10 comprises a compressor housing 11.
- the compressor housing 11 receives movable parts (not shown) of the compressor 10 which are used to compress a gaseous phase GR of a refrigerant.
- a "refrigerant" is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle. In most cycles it undergoes phase transitions from a liquid to a gas and back again.
- the refrigerant also has a liquid phase LR.
- the gaseous phase GR can be transferred into the liquid phase LR and vice versa.
- the gaseous phase GR can be named gaseous refrigerant.
- the liquid phase LR can be named liquid refrigerant.
- the compressor housing 11 has a cylindrical outer wall 12 which can be rotation-symmetric to a centerline 13.
- the compressor housing 11 further has a bottom cap 14 and a top cap 15 which hermetically close the outer wall 12 at its ends.
- the centerline 13 is arranged horizontally as shown in Fig. 2 .
- an accumulator 16 for storing the liquid phase LR of the refrigerant is received.
- the accumulator 16 uses parts of the compressor housing 11 as outer shell.
- the accumulator 16 is part of the compressor 10.
- the accumulator 16 is dedicated to store the liquid phase LR of the refrigerant before entering the compressor 10 itself. This is because only the gaseous phase GR but not the liquid phase LR can be compressed.
- the compressor housing 11 has an internal volume 17 which comprises the afore-mentioned movable parts of the compressor 10. In other words, the parts of the compressor 10 that are necessary for the compressing function of the compressor 10 are arranged inside the internal volume 17.
- the internal volume 17 is separated from the accumulator 16 by means of a separation wall 18.
- the separation wall 18 is a hermetic sealed wall which fluidly separates the accumulator 16 from the internal volume. No fluid can pass through the separation wall 18 itself.
- the separation wall 18 can be made of steel.
- the accumulator 16 has an inlet 19 which can be provided on top of the bottom cap 14.
- the gaseous phase GR of the refrigerant and the liquid phase LR of the refrigerant can enter the accumulator 16 through the inlet 19.
- the inlet 19 can be a pipe that is arranged parallel to the centerline 13.
- the inlet 19 can be welded to the bottom cap 14.
- the inlet 19 is arranged horizontally.
- the inlet 19 can also be arranged radially to the housing 11.
- the accumulator 16 comprises a backing pipe 20 which prevents the liquid phase LR from entering an external suction port (not shown) of the compressor 10, in particular from entering a compression chamber 23 of the compressor 10, and allows only the gaseous phase GR of the refrigerant entering it.
- the backing pipe 20 holds back the liquid phase LR in the accumulator 16.
- the backing pipe 20 is arranged at least partly inside the accumulator 16. For this reason, the backing pipe 20 can be named internal pipe.
- the backing pipe 20 is arranged perpendicular to the centerline 13 and runs therefore vertically.
- the backing pipe 20 breaks through the outer wall 12 of the compressor housing 11.
- the backing pipe 20 is connected to the afore mentioned external suction port of the compressor 10.
- the backing pipe 20 has a bore (not shown) through which oil for lubricating movable parts of the compressor 10 can pass.
- the accumulator 16 comprises a filter 21.
- the filter 21 is capable of removing particles like dust from the liquid phase LR of the refrigerant when entering the accumulator 16 through the inlet 19.
- the filter 21 is plate-shaped.
- the filter 21 can be a mesh, in particular a metal mesh, that is connected to the outer wall 12, the bottom cap 14 and the separation wall 18.
- the filter 21 is arranged horizontally. In particular, the filter 21 is arranged perpendicular to the backing pipe 20.
- the accumulator 16 further has an optional cover 22.
- the cover 22 is plate-shaped and covers the backing pipe 20 such that the liquid phase LR of the refrigerant entering the accumulator 16 through the inlet 19 cannot enter the backing pipe 20 directly.
- the cover 22 can be a steel plate.
- the cover 22 can have a circular, a rectangular or any other suitable shape.
- the cover 22 can be connected to the filter 21 so that the filter 21 and the cover 22 form a single component.
- the cover 22 can be also connected to the outer wall 12. For example, the cover 22 can be welded to the outer wall 12.
- the cover 22 is arranged with a distance from an upper end of the backing pipe 20.
- the compressor 10 comprises the compression chamber 23 which is arranged inside the internal volume 17 or is part of the internal volume 17.
- the compression chamber 23 has a suction port 24 which takes in the gaseous phase GR of the refrigerant.
- the suction port 24 can be a pipe.
- the suction port 24 can be an external suction port. In this case, the suction port 24 is guided through the compressor housing 11. The suction port 24 is then connected to the backing pipe 20 outside the compressor housing 11.
- the suction port 24 can also be an internal suction port.
- the suction port 24 is not guided through the compressor housing 11. Rather, the suction port 24 is connected to the backing pipe 20 inside the compressor housing 11.
- the compressor 10 has a plurality of compressor parts 25 that are necessary to compress the gaseous phase GR of the refrigerant.
- the compressor parts 25 can include an electro motor, a steering system, valves, pipes, a discharge port or the like.
- the function of the compressor 10 is as follows.
- the gaseous phase GR of the refrigerant enters the accumulator 16 through the inlet 19.
- the liquid phase LR also enters the accumulator 16 through the inlet 19.
- Both, the liquid phase LR and the gaseous phase GR pass through the filter 21, wherein particles can be removed from the liquid phase LR.
- the gaseous phase GR of the refrigerant can be directly fed to the suction port 24 by means of the backing pipe 20.
- the suction port 24 is an external suction port.
- the liquid phase LR is stored in the accumulator 16 until it evaporates and enters the suction port 24 of the compressor 10 through the backing pipe 20 as gaseous phase GR. In this way, the liquid phase LR is separated from the gaseous phase GR of the refrigerant.
- the accumulator 16 is arranged inside the compressor housing 11, an external accumulator can be avoided. In this way, additional available space around the compressor 10 can be obtained. This improves the space requirement for the compressor 10 which is very important in some applications like heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers. Furthermore, the compressor 10 can be produced at lower costs. The cost reduction comes from the fact that the assembly of the bottom cap 14 can be done in the same way as it is done currently. However, when assembling the bottom cap 14, the accumulator 16 can be integrated into the compressor 10.
- Figs. 6 and 7 show cross-sectional views of a further embodiment of the compressor 10.
- the embodiment of the compressor 10 according to Figs. 6 and 7 differs from the embodiment of the compressor 10 according to Figs. 2 to 5 only in that the backing pipe 20 is not connected to an external suction port but to an internal suction port (not shown) of the compressor 10.
- the backing pipe 20 is connected to an outlet 26 of the accumulator 16.
- the outlet 26 is a pipe that is arranged horizontally.
- the outlet 26 is connected to the suction port 24 of the compressor 10.
- the suction port 24 is an internal suction port.
- the outlet 26 is guided through the separation wall 18.
- the backing pipe 20 is guided through the separation wall 18 by means of the outlet 26.
- Fig. 8 shows a cross-sectional view of a further embodiment of the compressor 10.
- the embodiment of the compressor 10 according to Fig. 8 differs from the embodiment of the compressor 10 according to Figs. 2 to 5 only in that the filter 21 is not plate-shaped.
- the filter 21 has a cylindrical geometry and is plugged on the inlet 19.
- the filter 21 is a cylindrical mesh.
- the inlet 19 is arranged in a distance from the backing pipe 20.
- the cover 22 can be dispensable because the backing pipe 20 is placed so far away from the inlet 19 that the liquid phase LR of the refrigerant cannot directly reach the backing pipe 20.
- the inlet 19 itself can run straight horizontally.
- the inlet 19 can have a bend downwards so that the inlet 19 at least partly runs vertically (not shown).
- Fig. 9 shows a cross-sectional view of a further embodiment of the compressor 10.
- the embodiment of the compressor 10 according to Fig. 9 differs from the embodiment of the compressor 10 according to Figs. 2 to 5 only in that the filter 21 is directly attached to an end of the inlet 19 that extends into the accumulator 16.
- the filter 21 is plate-shaped.
- the filter 21 can have a circular shape.
- the filter 21 is a mesh.
- the inlet 19 is arranged in a distance from the backing pipe 20.
- the cover 22 can be dispensable because the backing pipe 20 is placed so far away from the inlet 19 that the liquid phase LR of the refrigerant cannot directly reach the backing pipe 20.
- the inlet 19 itself can run straight horizontally.
- the inlet 19 can have a bend downwards so that the inlet 19 at least partly runs vertically (not shown).
- Fig. 10 shows a cross-sectional view of a further embodiment of the compressor 10.
- the embodiment of the compressor 10 according to Fig. 10 differs from the embodiment of the compressor 10 according to Fig. 9 only in that the inlet 19 comprises a cone-shaped expansion 27 that extends into the accumulator 16.
- the filter 21 is attached to the expansion 27.
- the filter 21 is plate-shaped.
- the filter 21 can have a circular shape.
- the filter 21 is a mesh.
- the expansion 27 increases a diameter of the inlet 19 so that the filter 21 has a bigger cross-sectional area. Filtration can be improved in that way.
- the inlet 19 is arranged in a distance from the backing pipe 20.
- the cover 22 can be dispensable because the backing pipe 20 is placed so far away from the inlet 19 that the liquid phase LR of the refrigerant cannot directly reach the backing pipe 20.
- the inlet 19 itself can run straight horizontally.
- the inlet 19 can have a bend downwards so that the inlet 19 at least partly runs vertically (not shown).
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Abstract
Description
- The present invention relates to a compressor for a household appliance and to a household appliance with such a compressor.
- Household appliances like refrigerators, heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers comprise a compressor for compressing a gaseous phase of a refrigerant. For storing a liquid phase of the refrigerant, an accumulator can be provided. The accumulator can be placed outside a compressor housing of the compressor.
- It is one object of the present invention to provide an improved compressor.
- Accordingly, a compressor for a household appliance is provided. The compressor comprises a compressor housing, wherein the compressor housing receives a compression chamber for compressing a gaseous phase of a refrigerant, and an accumulator for storing a liquid phase of the refrigerant, wherein the accumulator is provided inside the compressor housing.
- Due to the fact that the accumulator is provided inside the compressor housing, an external accumulator can be avoided. In this way, additional available space around the compressor can be obtained. This improves the space requirements for the compressor which is of significant importance in some applications like heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers. Furthermore, the compressor can be produced at lower costs. The cost reduction comes from the fact that when assembling the compressor housing, the accumulator can be integrated into the compressor during assembly of the compressor housing.
- There can also be the case that there is no liquid phase. In this case, the complete refrigerant is in the gaseous phase. This means that the accumulator is only used when the liquid phase has to be stored prior to evaporation thereof. The compressor is able to compress the gaseous phase. The compressor preferably is a rotary compressor or can be named rotary compressor. A "refrigerant" is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle. In most cycles it undergoes phase transitions from a liquid to a gas and back again. The gaseous phase can be transferred into the liquid phase and vice versa. The gaseous phase can be named gaseous refrigerant. The liquid phase can be named liquid refrigerant.
- The compressor housing preferably has a cylindric shape with an outer wall, a bottom cap and a top cap. The caps hermetically close the outer wall at its ends. The compressor housing can be made of steel. The outer wall can be rotation-symmetric to a centerline. The centerline is preferably arranged horizontally so that also the compressor housing is arranged horizontally. However, the compressor can also be arranged vertically. The accumulator uses the bottom cap and part of the outer wall as outer shell. In particular, the accumulator is arranged inside the compressor housing. The centerline can be arranged horizontally or vertically. In other words, the compressor can be a horizontal compressor or a vertical compressor.
- According to an embodiment, the compressor housing encloses the accumulator and an internal volume which receives the compression chamber, wherein the accumulator comprises a separation wall which separates the accumulator from the internal volume.
- The separation wall prevents the refrigerant from entering the internal volume of the compressor itself. The separation wall can be a steel membrane. A "membrane" is a metal sheet that hermetically seals the compressor from the internal volume. Neither gas nor liquid can pass through the membrane. The membrane can be a steel sheet. The compressor can have a plurality of compressor parts that are necessary to compress the gaseous phase of the refrigerant. The compressor parts can include an electro motor, a steering system, valves, pipes, a discharge port, a piston or pistons, a muffler, a cylinder or the like. The compressor parts are also arranged inside the internal volume.
- According to a further embodiment, the accumulator is provided between the separation wall and a bottom cap of the compressor housing, wherein the bottom cap has an inlet for taking in the gaseous phase and the liquid phase of the refrigerant.
- To provide enough space for the accumulator, the bottom cap can be extended. The inlet can be a pipe that is arranged horizontally or radially to the cylindrical compressor housing.
- According to a further embodiment, the accumulator comprises a filter which is arranged downstream the inlet and inside the compressor housing.
- Both, the gaseous phase and the liquid phase pass through the filter when entering the accumulator. The filter is suitable of removing particles form the liquid phase.
- According to a further embodiment, the filter is cylindrical, wherein the filter is plugged on the inlet.
- For maintenance, the filter is replaceable.
- According to a further embodiment, the filter is plate-shaped, wherein the filter is attached to an end of the inlet.
- The filter is attached to an end of the inlet that protrudes inside the compressor housing. The filter can have a circular shape.
- According to a further embodiment, the inlet comprises an expansion, wherein the filter is attached to an end of the expansion.
- The expansion increases a diameter of the inlet so that the filter has a bigger cross-sectional area. Filtration can be improved in that way.
- According to a further embodiment, the filter is plate-shaped, wherein the filter is attached to the compressor housing.
- In particular, the filter can be attached to the separation wall, the bottom cap and the outer wall of the compressor housing.
- According to a further embodiment, the filter comprises a mesh.
- In particular, the filter comprises a metal mesh or a polymer mesh.
- According to a further embodiment, the accumulator comprises a backing pipe for holding back the liquid phase of the refrigerant in the accumulator.
- The backing pipe retains the liquid phase in the accumulator until it evaporates. The backing pipe allows the gaseous phase to leave the accumulator. In this way, the backing pipe is used for separating the liquid phase from the gaseous phase of the refrigerant. The backing pipe has a bore through which oil for lubricating movable parts of the compressor can pass.
- According to a further embodiment, the accumulator comprises a cover which covers the backing pipe for preventing the liquid phase of the refrigerant from entering the backing pipe and allowing the gaseous phase of the refrigerant to enter the backing pipe.
- The cover is optional. The cover is only used in design cases of the compressor in which the liquid phase of the refrigerant could directly flow from the inlet into the backing pipe. The cover can be a steel plate. The cover is arranged with a distance from an upper end of the backing pipe so that the gaseous phase can enter the backing pipe. The cover prevents the liquid phase leaving the inlet from directly going into the backing pipe.
- According to a further embodiment, the backing pipe is connected to a suction port of the compressor.
- The suction port can be an internal suction port or an external suction port. "Internal" means that the suction port is arranged inside the compressor housing. "External" means that the suction port is arranged outside the compressor housing.
- According to a further embodiment, the backing pipe is arranged inside the compressor housing, wherein the backing pipe is guided through the separation wall by means of an outlet of the accumulator, and wherein the outlet is connected to the suction port inside the compressor housing.
- In this case, the suction port is an internal suction port. The outlet can be a pipe that is guided through the separation wall.
- According to a further embodiment, the backing pipe is arranged at least partly outside the compressor housing, wherein the backing pipe is guided through the compressor housing, and wherein the backing pipe is connected to the suction port outside the compressor housing.
- In this case, the suction port is an external suction port. The backing pipe is guided through the compressor housing to the outside.
- All the afore mentioned design options of the compressor can be applied to both, horizontal compressors and vertical compressors.
- Further, a household appliance comprising such a compressor is provided.
- The household appliance can be a laundry dryer, a dishwasher, a refrigerator, a deep freezer or the like. In the case that the household appliance is a laundry dryer or a dishwasher, the compressor can be part of a heat pump. In particular, the household appliance can be a heat pump dryer, a heat pump washer, a heat pump washer-dryer or a heat pump dishwasher.
- Further possible implementations or alternative solutions of the invention also encompass combinations - that are not explicitly mentioned herein - of features described above or below with regard to the embodiments. The person skilled in the art may also add individual or isolated aspects and features to the most basic form of the invention.
- Further embodiments, features and advantages of the present invention will become apparent from the subsequent description and dependent claims, taken in conjunction with the accompanying drawings, in which:
-
Fig. 1 shows a schematic perspective view of one embodiment of a household appliance; -
Fig. 2 shows a cross-sectional view of one embodiment of a compressor for the household appliance according toFig. 1 ; -
Fig. 3 shows an enlarged view of the compressor according to the view III ofFig. 2 ; -
Fig. 4 shows a further cross-sectional view of the compressor according to the intersection line IV-IV ofFig. 2 ; -
Fig. 5 shows a further cross-sectional view of the compressor according to the intersection line V-V ofFig. 4 ; -
Fig. 6 shows a cross-sectional view of a further embodiment of a compressor for the household appliance according toFig. 1 ; -
Fig. 7 shows a further cross-sectional view of the compressor according to the intersection line VII-VII ofFig. 6 ; -
Fig. 8 shows a cross-sectional view of a further embodiment of a compressor for the household appliance according toFig. 1 ; -
Fig. 9 shows a cross-sectional view of a further embodiment of a compressor for the household appliance according toFig. 1 ; and -
Fig. 10 shows a cross-sectional view of a further embodiment of a compressor for the household appliance according toFig. 1 . - In the Figures, like reference numerals designate like or functionally equivalent elements, unless otherwise indicated.
-
Fig. 1 shows a schematic perspective view of one embodiment of a household appliance 1. The household appliance 1 can be a laundry dryer, a dishwasher, a refrigerator, a deep freezer or the like. The household appliance 1 has ahousing 2 comprising abottom 3, a ceiling 4 which is arranged opposite thebottom 3, two opposingside walls housing 2 is cuboid-shaped. Thehousing 2 has afront wall 8 which opposes the back wall 7. A door 9 is provided at thefront wall 8 which can be opened to put laundry or other items into the household appliance 1. In this case, the household appliance 1 is a front loader. The door 9 can also be provided at the ceiling 4. In this case, the household appliance 1 is a top loader. -
Fig. 2 shows a cross-sectional view of one embodiment of acompressor 10 for the household appliance 1.Fig. 3 shows an enlarged view of thecompressor 10 according to the view III ofFig. 2 .Fig. 4 shows a further cross-sectional view of thecompressor 10 according to the intersection line IV-IV ofFig. 2 .Fig. 5 shows a further cross-sectional view of thecompressor 10 according to the intersection line V-V ofFig. 4 . In the following,Figs. 2 to 5 are referred to at the same time. - In the case that the household appliance 1 is a laundry dryer or a dishwasher, the
compressor 10 is part of a heat pump. Thecompressor 10 is a rotary compressor. In particular, thecompressor 10 is a horizontal rotary compressor. Thecompressor 10 comprises acompressor housing 11. Thecompressor housing 11 receives movable parts (not shown) of thecompressor 10 which are used to compress a gaseous phase GR of a refrigerant. A "refrigerant" is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle. In most cycles it undergoes phase transitions from a liquid to a gas and back again. The refrigerant also has a liquid phase LR. The gaseous phase GR can be transferred into the liquid phase LR and vice versa. The gaseous phase GR can be named gaseous refrigerant. The liquid phase LR can be named liquid refrigerant. - The
compressor housing 11 has a cylindricalouter wall 12 which can be rotation-symmetric to acenterline 13. Thecompressor housing 11 further has abottom cap 14 and atop cap 15 which hermetically close theouter wall 12 at its ends. In use of thecompressor 10, thecenterline 13 is arranged horizontally as shown inFig. 2 . - In the
compressor housing 11, anaccumulator 16 for storing the liquid phase LR of the refrigerant is received. Theaccumulator 16 uses parts of thecompressor housing 11 as outer shell. Theaccumulator 16 is part of thecompressor 10. Theaccumulator 16 is dedicated to store the liquid phase LR of the refrigerant before entering thecompressor 10 itself. This is because only the gaseous phase GR but not the liquid phase LR can be compressed. Thecompressor housing 11 has aninternal volume 17 which comprises the afore-mentioned movable parts of thecompressor 10. In other words, the parts of thecompressor 10 that are necessary for the compressing function of thecompressor 10 are arranged inside theinternal volume 17. Theinternal volume 17 is separated from theaccumulator 16 by means of aseparation wall 18. Theseparation wall 18 is a hermetic sealed wall which fluidly separates theaccumulator 16 from the internal volume. No fluid can pass through theseparation wall 18 itself. Theseparation wall 18 can be made of steel. - As can be seen from
Figs. 2 ,3 and5 , theaccumulator 16 has aninlet 19 which can be provided on top of thebottom cap 14. The gaseous phase GR of the refrigerant and the liquid phase LR of the refrigerant can enter theaccumulator 16 through theinlet 19. Theinlet 19 can be a pipe that is arranged parallel to thecenterline 13. Theinlet 19 can be welded to thebottom cap 14. Theinlet 19 is arranged horizontally. Theinlet 19 can also be arranged radially to thehousing 11. - The
accumulator 16 comprises abacking pipe 20 which prevents the liquid phase LR from entering an external suction port (not shown) of thecompressor 10, in particular from entering acompression chamber 23 of thecompressor 10, and allows only the gaseous phase GR of the refrigerant entering it. Thebacking pipe 20 holds back the liquid phase LR in theaccumulator 16. Thebacking pipe 20 is arranged at least partly inside theaccumulator 16. For this reason, thebacking pipe 20 can be named internal pipe. Thebacking pipe 20 is arranged perpendicular to thecenterline 13 and runs therefore vertically. Thebacking pipe 20 breaks through theouter wall 12 of thecompressor housing 11. Thebacking pipe 20 is connected to the afore mentioned external suction port of thecompressor 10. Thebacking pipe 20 has a bore (not shown) through which oil for lubricating movable parts of thecompressor 10 can pass. - The
accumulator 16 comprises afilter 21. Thefilter 21 is capable of removing particles like dust from the liquid phase LR of the refrigerant when entering theaccumulator 16 through theinlet 19. Thefilter 21 is plate-shaped. Thefilter 21 can be a mesh, in particular a metal mesh, that is connected to theouter wall 12, thebottom cap 14 and theseparation wall 18. Thefilter 21 is arranged horizontally. In particular, thefilter 21 is arranged perpendicular to thebacking pipe 20. - The
accumulator 16 further has anoptional cover 22. Thecover 22 is plate-shaped and covers thebacking pipe 20 such that the liquid phase LR of the refrigerant entering theaccumulator 16 through theinlet 19 cannot enter thebacking pipe 20 directly. Thecover 22 can be a steel plate. Thecover 22 can have a circular, a rectangular or any other suitable shape. Thecover 22 can be connected to thefilter 21 so that thefilter 21 and thecover 22 form a single component. Thecover 22 can be also connected to theouter wall 12. For example, thecover 22 can be welded to theouter wall 12. Thecover 22 is arranged with a distance from an upper end of thebacking pipe 20. - Now returning back to
Fig. 2 , thecompressor 10 comprises thecompression chamber 23 which is arranged inside theinternal volume 17 or is part of theinternal volume 17. In thecompression chamber 23, the gaseous phase GR of the refrigerant is compressed. Thecompression chamber 23 has asuction port 24 which takes in the gaseous phase GR of the refrigerant. Thesuction port 24 can be a pipe. As mentioned before, thesuction port 24 can be an external suction port. In this case, thesuction port 24 is guided through thecompressor housing 11. Thesuction port 24 is then connected to thebacking pipe 20 outside thecompressor housing 11. - However, as will be mentioned later, the
suction port 24 can also be an internal suction port. In this case, thesuction port 24 is not guided through thecompressor housing 11. Rather, thesuction port 24 is connected to thebacking pipe 20 inside thecompressor housing 11. Thecompressor 10 has a plurality ofcompressor parts 25 that are necessary to compress the gaseous phase GR of the refrigerant. Thecompressor parts 25 can include an electro motor, a steering system, valves, pipes, a discharge port or the like. - The function of the
compressor 10 is as follows. The gaseous phase GR of the refrigerant enters theaccumulator 16 through theinlet 19. In case that there is also the liquid phase LR of the refrigerant, the liquid phase LR also enters theaccumulator 16 through theinlet 19. However, it is also possible that there is no liquid phase LR. This is the case when all the refrigerant is in the gaseous phase GR. Both, the liquid phase LR and the gaseous phase GR pass through thefilter 21, wherein particles can be removed from the liquid phase LR. Thecover 22, which is in this case needed, prevents the liquid phase LR from entering thebacking pipe 20 directly. The gaseous phase GR of the refrigerant can be directly fed to thesuction port 24 by means of thebacking pipe 20. In this case, thesuction port 24 is an external suction port. The liquid phase LR is stored in theaccumulator 16 until it evaporates and enters thesuction port 24 of thecompressor 10 through thebacking pipe 20 as gaseous phase GR. In this way, the liquid phase LR is separated from the gaseous phase GR of the refrigerant. - Due to the fact that the
accumulator 16 is arranged inside thecompressor housing 11, an external accumulator can be avoided. In this way, additional available space around thecompressor 10 can be obtained. This improves the space requirement for thecompressor 10 which is very important in some applications like heat pump dryers, heat pump washers, heat pump washer-dryers or heat pump dishwashers. Furthermore, thecompressor 10 can be produced at lower costs. The cost reduction comes from the fact that the assembly of thebottom cap 14 can be done in the same way as it is done currently. However, when assembling thebottom cap 14, theaccumulator 16 can be integrated into thecompressor 10. -
Figs. 6 and7 show cross-sectional views of a further embodiment of thecompressor 10. The embodiment of thecompressor 10 according toFigs. 6 and7 differs from the embodiment of thecompressor 10 according toFigs. 2 to 5 only in that thebacking pipe 20 is not connected to an external suction port but to an internal suction port (not shown) of thecompressor 10. Thebacking pipe 20 is connected to anoutlet 26 of theaccumulator 16. Theoutlet 26 is a pipe that is arranged horizontally. Theoutlet 26 is connected to thesuction port 24 of thecompressor 10. In this case, thesuction port 24 is an internal suction port. Theoutlet 26 is guided through theseparation wall 18. In other words, thebacking pipe 20 is guided through theseparation wall 18 by means of theoutlet 26. -
Fig. 8 shows a cross-sectional view of a further embodiment of thecompressor 10. The embodiment of thecompressor 10 according toFig. 8 differs from the embodiment of thecompressor 10 according toFigs. 2 to 5 only in that thefilter 21 is not plate-shaped. Thefilter 21 has a cylindrical geometry and is plugged on theinlet 19. Thefilter 21 is a cylindrical mesh. As can be seen fromFig. 8 , theinlet 19 is arranged in a distance from thebacking pipe 20. Thus, in the layout shown inFig. 8 , thecover 22 can be dispensable because thebacking pipe 20 is placed so far away from theinlet 19 that the liquid phase LR of the refrigerant cannot directly reach thebacking pipe 20. As shown inFig. 8 , theinlet 19 itself can run straight horizontally. Alternatively, theinlet 19 can have a bend downwards so that theinlet 19 at least partly runs vertically (not shown). -
Fig. 9 shows a cross-sectional view of a further embodiment of thecompressor 10. The embodiment of thecompressor 10 according toFig. 9 differs from the embodiment of thecompressor 10 according toFigs. 2 to 5 only in that thefilter 21 is directly attached to an end of theinlet 19 that extends into theaccumulator 16. Thefilter 21 is plate-shaped. Thefilter 21 can have a circular shape. Thefilter 21 is a mesh. As can be seen fromFig. 9 , theinlet 19 is arranged in a distance from thebacking pipe 20. Thus, in the layout shown inFig. 9 , thecover 22 can be dispensable because thebacking pipe 20 is placed so far away from theinlet 19 that the liquid phase LR of the refrigerant cannot directly reach thebacking pipe 20. As shown inFig. 9 , theinlet 19 itself can run straight horizontally. Alternatively, theinlet 19 can have a bend downwards so that theinlet 19 at least partly runs vertically (not shown). -
Fig. 10 shows a cross-sectional view of a further embodiment of thecompressor 10. The embodiment of thecompressor 10 according toFig. 10 differs from the embodiment of thecompressor 10 according toFig. 9 only in that theinlet 19 comprises a cone-shapedexpansion 27 that extends into theaccumulator 16. Thefilter 21 is attached to theexpansion 27. Thefilter 21 is plate-shaped. Thefilter 21 can have a circular shape. Thefilter 21 is a mesh. Theexpansion 27 increases a diameter of theinlet 19 so that thefilter 21 has a bigger cross-sectional area. Filtration can be improved in that way. - As can be seen from
Fig. 10 , theinlet 19 is arranged in a distance from thebacking pipe 20. Thus, in the layout shown inFig. 10 , thecover 22 can be dispensable because thebacking pipe 20 is placed so far away from theinlet 19 that the liquid phase LR of the refrigerant cannot directly reach thebacking pipe 20. As shown inFig. 10 , theinlet 19 itself can run straight horizontally. Alternatively, theinlet 19 can have a bend downwards so that theinlet 19 at least partly runs vertically (not shown). - Although the present invention has been described in accordance with preferred embodiments, it is obvious for the person skilled in the art that modifications are possible in all embodiments.
-
- 1
- household appliance
- 2
- housing
- 3
- bottom
- 4
- ceiling
- 5
- side wall
- 6
- side wall
- 7
- back wall
- 8
- front wall
- 9
- door
- 10
- compressor
- 11
- compressor housing
- 12
- outer wall
- 13
- centerline
- 14
- bottom cap
- 15
- top cap
- 16
- accumulator
- 17
- internal volume
- 18
- separation wall
- 19
- inlet
- 20
- backing pipe
- 21
- filter
- 22
- cover
- 23
- compression chamber
- 24
- suction port
- 25
- compressor part
- 26
- outlet
- 27
- expansion
- GR
- gaseous phase
- LR
- liquid phase
Claims (15)
- A compressor (10) for a household appliance (1), comprising a compressor housing (11), wherein the compressor housing (11) receives a compression chamber (23) for compressing a gaseous phase (GR) of a refrigerant, and an accumulator (16) for storing a liquid phase (LR) of the refrigerant, wherein the accumulator (16) is provided inside the compressor housing (11).
- The compressor according to claim 1, wherein the compressor housing (11) encloses the accumulator (16) and an internal volume (17) which receives the compression chamber (23), and wherein the accumulator (16) comprises a separation wall (18) which separates the accumulator (16) from the internal volume (17).
- The compressor according to claim 2, wherein the accumulator (16) is provided between the separation wall (18) and a bottom cap (14) of the compressor housing (11), and wherein the bottom cap (14) has an inlet (19) for taking in the gaseous phase (GR) and the liquid phase (LR) of the refrigerant.
- The compressor according to claim 3, wherein the accumulator (16) comprises a filter (21) which is arranged downstream the inlet (19) and inside the compressor housing (11).
- The compressor according to claim 4, wherein the filter (21) is cylindrical, and wherein the filter (21) is plugged on the inlet (19).
- The compressor according to claim 4, wherein the filter (21) is plate-shaped, and wherein the filter (21) is attached to an end of the inlet (19).
- The compressor according to claim 6, wherein the inlet (19) comprises an expansion (27), and wherein the filter (21) is attached to an end of the expansion (27).
- The compressor according to claim 4, wherein the filter (21) is plate-shaped, and wherein the filter (21) is attached to the compressor housing (11).
- The compressor according to one of claims 4 - 8, wherein the filter (21) comprises a mesh.
- The compressor according to one of claims 2 - 9, wherein the accumulator (16) comprises a backing pipe (20) for holding back the liquid phase (LR) of the refrigerant in the accumulator (16).
- The compressor according to claim 10, wherein the accumulator (16) comprises a cover (22) which covers the backing pipe (20) for preventing the liquid phase (LR) of the refrigerant from entering the backing pipe (20) and allowing the gaseous phase (GR) of the refrigerant to enter the backing pipe (20).
- The compressor according to claim 11, wherein the backing pipe (20) is connected to a suction port (24) of the compressor (10).
- The compressor according to claim 12, wherein the backing pipe (20) is arranged inside the compressor housing (11), wherein the backing pipe (20) is guided through the separation wall (18) by means of an outlet (26) of the accumulator (16), and wherein the outlet (26) is connected to the suction port (24) inside the compressor housing (11).
- The compressor according to claim 12, wherein the backing pipe (20) is arranged at least partly outside the compressor housing (11), wherein the backing pipe (20) is guided through the compressor housing (11), and wherein the backing pipe (20) is connected to the suction port (24) outside the compressor housing (11).
- A household appliance (1) comprising a compressor (10) according to one of claims 1 - 14.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19382541 | 2019-06-26 |
Publications (2)
Publication Number | Publication Date |
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EP3757482A1 true EP3757482A1 (en) | 2020-12-30 |
EP3757482B1 EP3757482B1 (en) | 2022-08-24 |
Family
ID=67180709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20179067.2A Active EP3757482B1 (en) | 2019-06-26 | 2020-06-09 | Compressor and household appliance |
Country Status (3)
Country | Link |
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EP (1) | EP3757482B1 (en) |
CN (1) | CN112145434A (en) |
PL (1) | PL3757482T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20220144675A (en) * | 2021-04-20 | 2022-10-27 | 엘지전자 주식회사 | Accumulator for compressor and compressor with this |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4194370A (en) * | 1976-08-13 | 1980-03-25 | Tecumseh Products Company | Accumulator for refrigeration system |
JP2005146987A (en) * | 2003-11-14 | 2005-06-09 | Sanyo Electric Co Ltd | Heat exchanger integral type horizontal compressor with built-in accumulator |
US20120171066A1 (en) * | 2010-12-29 | 2012-07-05 | Jinung Shin | Compressor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010002267U (en) * | 1998-12-08 | 2001-10-23 | 전주범 | Accumulator integrated rotary compressor with insulation |
CN2760282Y (en) * | 2004-12-22 | 2006-02-22 | 上海日立电器有限公司 | Liquid reservoir integrated air conditioner compressor |
JP2007009789A (en) * | 2005-06-30 | 2007-01-18 | Denso Corp | Accumulator-integrated compressor and vapor-compression refrigerating system |
CN101004173A (en) * | 2006-01-18 | 2007-07-25 | 上海日立电器有限公司 | Rolling piston type compressor with no reservoir |
CN108412769B (en) * | 2018-05-15 | 2023-10-03 | 珠海格力电器股份有限公司 | Compressor assembly |
-
2020
- 2020-06-09 EP EP20179067.2A patent/EP3757482B1/en active Active
- 2020-06-09 PL PL20179067.2T patent/PL3757482T3/en unknown
- 2020-06-24 CN CN202010586776.1A patent/CN112145434A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4194370A (en) * | 1976-08-13 | 1980-03-25 | Tecumseh Products Company | Accumulator for refrigeration system |
JP2005146987A (en) * | 2003-11-14 | 2005-06-09 | Sanyo Electric Co Ltd | Heat exchanger integral type horizontal compressor with built-in accumulator |
US20120171066A1 (en) * | 2010-12-29 | 2012-07-05 | Jinung Shin | Compressor |
Also Published As
Publication number | Publication date |
---|---|
PL3757482T3 (en) | 2022-12-05 |
CN112145434A (en) | 2020-12-29 |
EP3757482B1 (en) | 2022-08-24 |
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