CN114576161A - Scroll compressor with discharge port deflector - Google Patents
Scroll compressor with discharge port deflector Download PDFInfo
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- CN114576161A CN114576161A CN202111237396.8A CN202111237396A CN114576161A CN 114576161 A CN114576161 A CN 114576161A CN 202111237396 A CN202111237396 A CN 202111237396A CN 114576161 A CN114576161 A CN 114576161A
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- compressor
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- 239000003507 refrigerant Substances 0.000 claims abstract description 41
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- 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
- F04C29/06—Silencing
- F04C29/068—Silencing the silencing means being arranged inside the pump housing
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- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
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- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A scroll compressor (1) is provided with: a compressor housing (2) having a discharge opening (4); a stationary scroll (7) arranged within the compressor housing (2) and comprising a stationary base plate (11) and a discharge channel (16) formed in the stationary base plate (11) and provided with a discharge port (17) emerging in a discharge pressure volume (18) at least partially defined by the compressor housing (2) and the stationary scroll (7); and a deflector (29) arranged in the discharge pressure volume (18), the deflector (29) covering the discharge port (17) and at least partially delimiting a discharge opening (31) facing the discharge opening (4) of the compressor casing (2), the deflector (29) being configured to force a smooth transition of the compressed refrigerant gas flow coming out of the discharge port (17) from an axial direction to a radial direction and to direct said compressed refrigerant gas flow towards the discharge opening (4).
Description
Technical Field
The present invention relates to a scroll compressor provided with a deflector disposed in the discharge pressure volume bounded by the fixed scroll and the compressor housing.
Background
JP 07189966 a shows a scroll compressor provided with a deflector device arranged in the discharge pressure volume and configured to change the direction of the flow of compressed refrigerant gas out of the compression chamber from a direction parallel to the longitudinal axis of the scroll compressor to a direction orthogonal to the longitudinal axis of the scroll compressor. By directing the flow of compressed refrigerant gas towards the side wall of the discharge pressure volume, direct impingement of the compressed refrigerant gas on the upper end wall surface of the compressor shell is avoided. Thus, the pulsation noise is reduced.
Because of the discharge connection formed in the upper end wall of the compressor shell, the compressed refrigerant gas undergoes an additional change in its flow direction before exiting the discharge pressure volume. This results in a significant pressure drop of the compressed refrigerant gas.
US 2019/0195224 a1 discloses a scroll compressor provided with a muffler attached to a base plate of a fixed scroll and covering a discharge port formed in a central portion of the fixed scroll. Also here, a direct flow of compressed refrigerant gas to the upper end wall of the compressor housing is avoided. However, this solution again results in an increased pressure drop in the compressed refrigerant gas, since the direction of the compressed refrigerant gas flow changes several times before it leaves the muffler chamber through the discharge orifice and flows to the discharge of the compressor housing.
Disclosure of Invention
It is an object of the present invention to provide an improved scroll compressor which overcomes the disadvantages encountered in conventional scroll compressors.
It is another object of the present invention to provide a scroll compressor having improved efficiency by reducing pressure loss in the discharge pressure volume.
It is also an object of the present invention to reduce the noise emanating from the compressor housing.
According to the present invention, such a scroll compressor comprises:
-a compressor housing having a discharge port;
-an orbiting scroll disposed within the compressor housing and including an orbiting base plate and an orbiting spiral wrap extending from the orbiting base plate;
-a fixed scroll disposed within the compressor housing and including a fixed baseplate and a fixed spiral wrap extending from the fixed baseplate, the fixed spiral wrap and the orbiting spiral wrap defining a compression chamber with the fixed baseplate and the orbiting baseplate, the fixed scroll further including a discharge passage formed in the fixed baseplate and provided with a discharge port that appears in a discharge pressure volume defined at least in part by the compressor housing and the fixed scroll; and
-a deflector arranged in the discharge pressure volume, the deflector covering the discharge port and at least partially delimiting a discharge opening facing the discharge opening of the compressor housing, the deflector being configured to force a compressed refrigerant gas flow coming out of the discharge port to transform from an axial direction to a radial direction and advantageously smoothly from an axial direction to a radial direction, and to direct the compressed refrigerant gas flow towards the discharge opening and in particular towards the discharge opening.
Since the deflector extends above the discharge port and is configured to direct the flow of compressed refrigerant gas towards the discharge port, the flow of compressed refrigerant gas is prevented from directly impinging on the upper end wall of the compressor housing and the compressed refrigerant gas does not undergo several changes in its flow direction before leaving the discharge pressure volume, which substantially reduces pressure losses in the discharge pressure volume while suppressing pulsations and resonance waves between the compressor housing and the discharge port.
Thus, the acoustic behavior and efficiency of the scroll compressor according to the present invention is substantially improved compared to the acoustic behavior and efficiency of prior art compressors. In particular, a great improvement (up to-4 dB) is observed, especially for frequencies of 2.5 kHz.
The scroll compressor may also include one or more of the following features, either alone or in combination.
According to an embodiment of the present invention, the discharge passage extends substantially parallel to the longitudinal axis of the scroll compressor.
According to an embodiment of the invention, the discharge channel is configured to fluidly connect the compression chamber to the discharge pressure volume.
According to an embodiment of the present invention, the discharge port is provided at a central portion of the fixed base plate of the fixed scroll.
According to an embodiment of the invention, the discharge opening is provided on an upper cover of the compressor housing. Advantageously, the outlet opening is provided in a side wall of the upper cover.
According to an embodiment of the invention, the deflector has an elbow shape.
According to an embodiment of the invention, the deflector is attached to the fixed base plate of the fixed scroll.
According to an embodiment of the invention, the deflector is attached to a substrate face of the stationary substrate facing away from the compression chamber.
According to an embodiment of the invention, the deflector comprises a first end sealingly attached to the fixed base plate of the fixed scroll and a second end at least partially delimiting the discharge opening.
According to an embodiment of the invention, said first end of said deflector is sealingly attached to said fixed base plate of said fixed scroll adjacent to said discharge port.
According to an embodiment of the invention, the discharge opening is present in the discharge pressure volume at a predetermined separation distance from the discharge opening to allow the compressed refrigerant gas flow to pass to the discharge pressure volume.
According to an embodiment of the invention, the scroll compressor further comprises a discharge check valve assembly attached to the discharge port of the compressor housing and configured to: when the scroll compressor is stopped, refrigerant is prevented from flowing back into the discharge pressure volume from an external conduit of a refrigeration system.
According to an embodiment of the invention, the discharge check valve assembly comprises a tubular valve housing having an inlet opening, which is present in the discharge pressure volume, and an outlet opening, which is present outside the compressor housing and is configured to be fluidly connected to the external pipe of a refrigeration system.
According to an embodiment of the invention, the discharge opening faces the inlet opening of the tubular valve housing and is located at a predetermined spacing distance from the inlet opening of the tubular valve housing.
According to an embodiment of the invention, the ratio between the cross section of the inlet opening and the cross section of the discharge opening is between 0.8 and 1.2, and for example between 0.9 and 1.1. In other words, the inlet opening and the discharge opening of the tubular valve housing are similar in size.
According to an embodiment of the invention, said discharge opening and said inlet opening are configured such that a major portion of said compressed refrigerant gas exiting said discharge port of said fixed scroll is delivered directly into said inlet opening of said tubular valve housing. This configuration of the discharge check valve assembly and deflector allows for a reduction in pressure loss in the compressed refrigerant gas stream.
According to an embodiment of the invention, the discharge channel comprises a wall portion having a curved convex surface portion facing the discharge opening and advantageously towards the discharge check valve assembly and in particular towards the inlet opening of the tubular valve housing.
According to an embodiment of the invention, the deflector and the curved convex surface portion of the discharge channel define a smooth surface structure. This configuration of the deflector and the discharge channel allows a further reduction of the pressure losses. This is particularly important when low density refrigerants (e.g., low GWP (global warming potential) refrigerants) are used when increased volumetric flow is required to maintain a given cooling capacity.
According to an embodiment of the invention, the deflector comprises an upper wall portion having an inner deflection surface portion, which is concave and curved, which inner deflection surface portion is directed towards the discharge opening. This configuration of the discharge channel allows a further reduction of the pressure loss in the compressed refrigerant gas flow.
The deflector may be manufactured as a sintered, pressed, stamped, machined or molded metal part. Preferably, the deflector is made as a molded or 3D printed plastic part.
Advantageously, the deflector is attached to the fixed scroll member by use of screws or bolts. However, other suitable methods (e.g., welding, brazing, press fitting, or gluing) may be applied to attach the deflector to the fixed scroll.
These and other advantages will become apparent upon reading the following description, considering the attached drawings which represent, by way of non-limiting example, embodiments of a scroll compressor according to the present invention.
Drawings
The following detailed description of the embodiments of the present invention can be best understood when read in conjunction with the accompanying drawings, however, it is to be understood that the invention is not limited to the specific embodiments disclosed.
Fig. 1 is a longitudinal sectional view of a scroll compressor according to the present invention.
FIG. 2 is a partial longitudinal cross-sectional view of the scroll compressor of FIG. 1 showing the discharge check valve assembly in the closed position.
FIG. 3 is a partial longitudinal cross-sectional view of the scroll compressor of FIG. 1 showing the discharge check valve assembly in an open position with the discharge passage in the discharge check valve assembly including a wall portion having a chamfer.
FIG. 4 is a partial longitudinal cross-sectional view of the scroll compressor of FIG. 1 showing the discharge check valve assembly in an open position with the discharge passage of the discharge check valve assembly including a wall portion having a curved convex surface portion.
FIG. 5 is a partial top view of the scroll compressor of FIG. 1.
FIG. 6 is a perspective view of a deflector of the scroll compressor of FIG. 1.
Detailed Description
FIG. 1 depicts a scroll compressor 1 according to the present invention occupying a vertical position.
The scroll compressor 1 includes a compressor housing 2, the compressor housing 2 being provided with a suction port 3 and a discharge port 4, the suction port 3 being configured to supply refrigerant to be compressed to the scroll compressor 1, and the discharge port 4 being configured to discharge the compressed refrigerant. The discharge opening 4 is advantageously provided in a side wall of the upper cover of the compressor housing 2.
The scroll compressor 1 further includes a support device 5, the support device 5 being fixed to the compressor housing 2, and a compression unit 6, the compression unit 6 being disposed inside the compressor housing 2 and supported by the support device 5. The compression unit 6 is configured to compress the refrigerant supplied through the suction port 3. The compression unit 6 includes a fixed scroll 7 and an orbiting scroll 8, the fixed scroll 7 being fixed with respect to the compressor housing 2, the orbiting scroll 8 being supported by a thrust bearing surface 9 provided on the support 5 and being in sliding contact with the thrust bearing surface 9.
The fixed scroll 7 includes a fixed base plate 11, the fixed base plate 11 having a lower face oriented toward the orbiting scroll 8 and an upper face opposite the lower face of the fixed base plate 11. The fixed scroll 7 further includes a fixed spiral wrap (spiral wrap)12, and the fixed spiral wrap 12 projects from a lower surface of the fixed base plate 11 toward the orbiting scroll 8.
The orbiting scroll 8 includes an orbiting base plate 13, the orbiting base plate 13 having an upper face oriented toward the fixed scroll 7 and a lower face opposed to the upper face of the orbiting base plate 13 and slidably mounted on the thrust bearing face 9. The orbiting scroll 8 further includes an orbiting spiral wrap 14, and the orbiting spiral wrap 14 protrudes from an upper surface of the orbiting base plate 13 toward the fixed scroll 7. An orbiting spiral wrap 14 of the orbiting scroll 8 is engaged with a fixed spiral wrap 12 of the fixed scroll 7 to form a plurality of compression chambers 15 between the orbiting spiral wrap 14 and the fixed spiral wrap 12. Each of the compression chambers 15 has a variable volume, and the variable volume of each of the compression chambers 15 decreases from the outside inward when the orbiting scroll 8 is driven to orbit relative to the fixed scroll 7.
The fixed scroll 7 further includes a discharge passage 16, and the discharge passage 16 is formed in a central portion of the fixed base plate 11 and is fluidly connected to the compression chamber 15. The discharge passage 16 extends parallel to the longitudinal axis of the scroll compressor 1 and is provided with a discharge port 17, which discharge port 17 emerges in a discharge pressure volume 18 defined by the compressor housing 2 and the fixed scroll 7. Thus, the discharge channel 16 is configured to fluidly connect the compression chamber 15 to the discharge pressure volume 18.
Further, the scroll compressor 1 comprises a drive shaft 19 and an electric drive motor 21, the drive shaft 19 extending vertically and being configured to drive said orbiting scroll member 8 in an orbiting (orbital) movement, the electric drive motor 21 may for example be a variable speed electric drive motor, the electric drive motor 21 being coupled to the drive shaft 19 and being configured to drive said drive shaft 19 in rotation about the rotation axis a.
The scroll compressor 1 further includes a discharge check valve assembly 22, the discharge check valve assembly 22 being attached to the discharge port 4 and fluidly connected to the discharge pressure volume 18. Discharge check valve assembly 22 is specifically configured to: when the scroll compressor 1 is stopped, refrigerant is prevented from flowing back into the discharge pressure volume 18 from the high pressure side of the refrigeration system.
The discharge check valve assembly 22 comprises a tubular valve housing 23, which tubular valve housing 23 is inserted into the discharge opening 4 of the compressor housing 2 and is sealingly fixed to the discharge opening 4. The tubular valve housing 23 has a first end portion 23.1 and a second end portion 23.2, the first end portion 23.1 being arranged inside the discharge pressure volume 18 and being provided with an inlet opening 24 appearing in the discharge pressure volume 18, the second end portion 23.2 being arranged outside the compressor housing 2 and being provided with an outlet opening 25 appearing outside the compressor housing 2, and said outlet opening 25 being configured to be fluidly connected to an external conduit of the refrigeration system. According to the embodiment shown in fig. 1 to 6, the second end portion 23.2 of the tubular valve housing 23 serves as a joint for connecting external pipes of the refrigeration system.
The discharge check valve assembly 22 further includes a valve seat 26, the valve seat 26 being located within the tubular valve housing 23 and formed at an inner surface of the tubular valve housing 23. The valve seat 26 is annular and extends around the inlet opening 24. Advantageously, the valve seat 26 is provided on the first end portion 23.1.
The discharge check valve assembly 22 further comprises a valve member 27, which valve member 27 is arranged within the tubular valve housing 23 and is movable between a closed position (see fig. 2), in which the valve member 27 rests against the valve seat 26, and an open position (see fig. 3), in which the valve member 27 is remote from the valve seat 26.
Discharge check valve assembly 22 further includes a biasing element 28 (such as a spring element), biasing element 28 being configured to bias valve member 27 toward the closed position.
The scroll compressor 1 further includes a deflector 29, the deflector 29 being disposed in the discharge pressure volume 18 and covering the discharge port 17. Deflector 29 may be manufactured as a sintered, pressed, stamped, machined or molded metal part. However, the deflector 29 is preferably made as a molded or 3D printed plastic part.
The deflector 29 comprises a first end 29.1, which first end 29.1 is sealingly attached to the upper face of the fixed base plate 11 of the fixed scroll 7 and is located in the vicinity of the discharge port 17, and a second end 29.2, which second end 29.2 at least partially delimits a discharge opening 31 facing the inlet opening 24 and the discharge 4 of the compressor housing 2. According to the embodiment shown in the figures, the discharge opening 31 is delimited by the fixed base plate 11 of the fixed scroll 7 and the second end 29.2 of the deflector 29. However, the discharge opening 31 may, for example, be completely delimited by the second end 29.2 of the deflector 29.
Advantageously, the deflector 29 is attached to the fixed scroll 7 by using screws or bolts. However, other suitable methods (e.g., welding, brazing, press fitting, or gluing) may be applied to attach the deflector 29 to the fixed scroll 7.
According to the embodiment shown in the figures, the deflector 29 has an elbow-like shape and comprises an upper wall portion 32 having an inner deflector surface portion which is concave and curved and which faces the discharge opening 4.
The deflector 29 is configured to direct the flow of compressed refrigerant gas exiting the discharge port 17 towards the discharge port 4, in particular towards the outlet opening 25 of the tubular valve housing 23. The deflector 29 is also configured to force the compressed refrigerant gas flow to smoothly transition from an axial direction to a radial direction relative to the longitudinal axis of the scroll compressor.
According to the embodiment shown in the drawings, the discharge opening 31 faces the inlet opening 24 of the tubular valve housing 23 and is present in the discharge pressure volume 18 at a predetermined separation distance D1 from the discharge opening 4 and is located at a predetermined spacing distance D2 from the inlet opening 24 of the tubular valve housing 23 in order to allow a compressed refrigerant gas flow to pass to the discharge pressure volume 18 and to ease the installation of the discharge check valve assembly 22 relative to the deflector 29. The predetermined separation distance D2 is between 2mm and 40mm, and advantageously between 10mm and 30 mm. However, the discharge opening 31 and the inlet opening 24 are configured such that most of the compressed refrigerant gas exiting the discharge port 17 of the fixed scroll 7 is directly delivered into the inlet opening 24 of the tubular valve housing 23.
The ratio between the cross section of the inlet opening 24 and the cross section of the discharge opening 31 is between 0.8 and 1.2, and advantageously between 0.9 and 1.1, so that the inlet opening 24 and the discharge opening 31 of the tubular valve housing 23 are similar in size.
According to the embodiment shown in fig. 4, the discharge channel 16 comprises a wall portion 33, which wall portion 33 has a curved convex surface portion facing the inlet opening 24 of the tubular valve housing 23. Advantageously, the inner surface of the deflector 29 and the curved convex surface portion of the discharge channel 16 define a smooth surface structure. This configuration of the deflector 29 and the discharge channel 16 allows a further reduction of the pressure losses. This is particularly important when low density refrigerants (e.g., low GWP (global warming potential) refrigerants) are used when increased volumetric flow is required to maintain a given cooling capacity.
However, according to alternative embodiments of the present invention, the discharge passage 16 may include a wall portion 33 (see fig. 3) defined by a chamfer, or a wall portion 33 (see fig. 2) having a cylindrical shape.
The operation of the scroll compressor 1 will now be described.
When the scroll compressor 1 according to the present invention is started, the orbiting scroll 8 is driven by the drive shaft 19 to follow an orbiting motion, and this motion of the orbiting scroll 8 causes refrigerant to be sucked into the compression chamber 15 and compressed in the compression chamber 15. The compressed refrigerant gas exits toward the discharge pressure volume 18 via the discharge passage 16 and the discharge port 17 formed in the central portion of the fixed scroll 7, is guided by the deflector 29 toward the inlet opening 24 of the tubular valve housing 23, moves the valve member 27 into the open position against the biasing force exerted by the biasing element 28, and then flows through the tubular valve housing 23 and the outlet opening 25 of the tubular valve housing 23.
Due to the configuration of the deflector 29, the wall portion 33 of the discharge channel 16 and the inlet opening 24 of the tubular valve housing 23, the pressure loss in the compressed refrigerant gas is significantly reduced, which significantly improves the efficiency and performance of the scroll compressor 1.
When the scroll compressor 1 according to the present invention is stopped, the biasing element 28 biases the valve member 27 toward the closed position, which prevents the high pressure refrigerant from returning to the discharge pressure volume 18.
The invention is of course not limited to the embodiments described above by way of non-limiting examples, but on the contrary encompasses all embodiments thereof.
Claims (10)
1. A scroll compressor (1) comprising:
-a compressor housing (2), the compressor housing (2) having a discharge opening (4);
-an orbiting scroll (8), the orbiting scroll (8) being arranged within the compressor housing (2) and comprising an orbiting base plate (13) and an orbiting spiral wrap (14) extending from the orbiting base plate (13);
-a fixed scroll (7), the fixed scroll (7) being arranged within the compressor housing (2) and comprising a fixed base plate (11) and a fixed spiral wrap (12) extending from the fixed base plate (11), the fixed spiral wrap (12) and the orbiting spiral wrap (14) defining a compression chamber (15) together with the fixed base plate (11) and the orbiting base plate (13), the fixed scroll (7) further comprising a discharge channel (16), the discharge channel (16) being formed in the fixed base plate (11) and being provided with a discharge port (17), the discharge port (17) being present in a discharge pressure volume (18) at least partially defined by the compressor housing (2) and the fixed scroll (7); and
-a deflector (29), said deflector (29) being arranged in said discharge pressure volume (18), said deflector (29) covering said discharge port (17) and at least partially delimiting a discharge opening (31) facing said discharge outlet (4) of said compressor casing (2), said deflector (29) being configured to force a compressed refrigerant gas flow coming out of said discharge port (17) to transform from an axial direction into a radial direction and to direct said compressed refrigerant gas flow towards said discharge outlet (4),
wherein the deflector (29) has an elbow shape,
wherein the deflector (29) is attached to the fixed base plate (11) of the fixed scroll (7), and
wherein the deflector comprises an upper wall portion having an inner deflection surface portion which is concave and curved, the inner deflection surface portion facing the discharge opening.
2. Scroll compressor (1) according to claim 1, wherein said deflector (29) comprises a first end (29.1) and a second end (29.2), said first end (29.1) being sealingly attached to said fixed base plate (11) of said fixed scroll (7), said second end (29.2) at least partially delimiting said discharge opening (31).
3. A scroll compressor (1) as claimed in claim 1 or 2, wherein said discharge opening (31) is present in said discharge pressure volume (18) at a predetermined separation distance (D1) from said discharge port (4) to allow said compressed refrigerant gas flow to be delivered to said discharge pressure volume (18).
4. The scroll compressor (1) of any of claims 1 to 3, further comprising a discharge check valve assembly (22), the discharge check valve assembly (22) attached to the discharge port (4) of the compressor housing (2) and configured to: when the scroll compressor (1) is stopped, a back flow of refrigerant from an external conduit of a refrigeration system into the discharge pressure volume (18) is prevented.
5. The scroll compressor (1) according to claim 4, wherein the discharge check valve assembly (22) comprises a tubular valve housing (23), the tubular valve housing (23) having an inlet opening (24) and an outlet opening (25), the inlet opening (24) occurring in the discharge pressure volume (18), the outlet opening (25) occurring outside the compressor housing (2) and being configured to be fluidly connected to the external piping of a refrigeration system.
6. A scroll compressor (1) as claimed in claim 5, wherein the discharge opening (31) faces the inlet opening (24) of the tubular valve housing (23) and is located at a predetermined spacing distance (D2) from the inlet opening (24) of the tubular valve housing (23).
7. A scroll compressor (1) according to claim 5 or 6, wherein the ratio between the cross section of the inlet opening (24) and the cross section of the discharge opening (31) is between 0.8 and 1.2, and for example between 0.9 and 1.1.
8. A scroll compressor (1) as claimed in any one of claims 5 to 7, wherein said discharge opening (31) and said inlet opening (24) are configured such that a major portion of the compressed refrigerant gas exiting the discharge port (17) of the fixed scroll member (7) is delivered directly into the inlet opening (24) of the tubular valve housing (23).
9. A scroll compressor (1) as claimed in any one of claims 1 to 8, wherein the discharge passage (16) comprises a wall portion having a curved convex surface portion towards the discharge port (4).
10. A scroll compressor (1) as claimed in claim 9, wherein said deflector (29) and said curved convex surface portion of said discharge passage (16) define a smooth surface structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR20/12478 | 2020-12-01 | ||
| FR2012478A FR3116868B1 (en) | 2020-12-01 | 2020-12-01 | Scroll compressor with discharge port baffle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114576161A true CN114576161A (en) | 2022-06-03 |
Family
ID=74347334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111237396.8A Pending CN114576161A (en) | 2020-12-01 | 2021-10-22 | Scroll compressor with discharge port deflector |
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| Country | Link |
|---|---|
| US (1) | US20220170466A1 (en) |
| CN (1) | CN114576161A (en) |
| DE (1) | DE102021129215A1 (en) |
| FR (1) | FR3116868B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3137725A1 (en) * | 2022-07-11 | 2024-01-12 | Danfoss Commercial Compressors | Scroll compressor comprising a discharge check valve assembly with metal-to-metal sealing surfaces |
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| US5141420A (en) * | 1990-06-18 | 1992-08-25 | Copeland Corporation | Scroll compressor discharge valve |
| JPH07189966A (en) * | 1993-12-28 | 1995-07-28 | Mitsubishi Electric Corp | Scroll compressor |
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| DE102012022615B4 (en) * | 2011-11-30 | 2023-11-02 | Danfoss Commercial Compressors | Scroll refrigeration compressor |
| KR102310647B1 (en) * | 2014-12-12 | 2021-10-12 | 삼성전자주식회사 | Compressor |
| KR102342565B1 (en) * | 2014-12-30 | 2021-12-23 | 삼성전자주식회사 | Oil level detecting apparatus and control method thereof, oil flow detecting apparatus and control method thereof, method for control oil return using oil level and oil flow |
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| KR20210021877A (en) * | 2019-08-19 | 2021-03-02 | 엘지전자 주식회사 | A compressor |
-
2020
- 2020-12-01 FR FR2012478A patent/FR3116868B1/en active Active
-
2021
- 2021-10-22 CN CN202111237396.8A patent/CN114576161A/en active Pending
- 2021-11-10 DE DE102021129215.8A patent/DE102021129215A1/en active Pending
- 2021-11-17 US US17/528,262 patent/US20220170466A1/en active Pending
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| JPS5960098A (en) * | 1982-09-30 | 1984-04-05 | Toshiba Corp | Scroll compressor |
| US5141420A (en) * | 1990-06-18 | 1992-08-25 | Copeland Corporation | Scroll compressor discharge valve |
| JPH07189966A (en) * | 1993-12-28 | 1995-07-28 | Mitsubishi Electric Corp | Scroll compressor |
| US5921761A (en) * | 1997-04-17 | 1999-07-13 | Copeland Corporation | Scroll machine with discharge duct |
| CN1280251A (en) * | 1999-07-07 | 2001-01-17 | 科普兰公司 | Silencer for scroll compressor exhaust gas |
| KR20030044252A (en) * | 2001-11-29 | 2003-06-09 | 주식회사 롤텍 | Structure Able to Reduce Any Noise for a Scroll Compressor |
| US20050238518A1 (en) * | 2004-04-26 | 2005-10-27 | Danfoss Maneurop S.A. | Discharge check valve assembly for use with hermetic scroll compressor |
| CN1773118A (en) * | 2004-11-12 | 2006-05-17 | Lg电子株式会社 | Scroll compressor |
| CN105864035A (en) * | 2015-02-09 | 2016-08-17 | 丹佛斯商用压缩机公司 | Scroll compressor having soft-start device |
| US20170067467A1 (en) * | 2015-09-09 | 2017-03-09 | Lg Electronics Inc. | Scroll compressor |
| CN106523372A (en) * | 2015-09-09 | 2017-03-22 | Lg电子株式会社 | Scroll compressor |
| US20200191145A1 (en) * | 2017-06-06 | 2020-06-18 | Mitsubishi Electric Corporation | Scroll compressor and refrigeration cycle apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3116868B1 (en) | 2024-06-28 |
| DE102021129215A1 (en) | 2022-06-02 |
| US20220170466A1 (en) | 2022-06-02 |
| FR3116868A1 (en) | 2022-06-03 |
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