US20040184940A1 - Compressor for and method of simultaneously cooling and cleaning gas - Google Patents
Compressor for and method of simultaneously cooling and cleaning gas Download PDFInfo
- Publication number
- US20040184940A1 US20040184940A1 US10/770,757 US77075704A US2004184940A1 US 20040184940 A1 US20040184940 A1 US 20040184940A1 US 77075704 A US77075704 A US 77075704A US 2004184940 A1 US2004184940 A1 US 2004184940A1
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- United States
- Prior art keywords
- filter
- chamber
- type compressor
- scroll type
- compressor according
- 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.)
- Abandoned
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims description 12
- 238000004140 cleaning Methods 0.000 title description 5
- 230000006835 compression Effects 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 35
- 239000002826 coolant Substances 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 67
- 239000000126 substance Substances 0.000 claims description 22
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- 239000000112 cooling gas Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 description 20
- 239000000498 cooling water Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 230000002411 adverse Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000015250 liver sausages Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
-
- 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
- F04C29/04—Heating; Cooling; Heat insulation
-
- 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
Definitions
- the present invention relates to a compressor that compresses gas to be supplied preferably to a fuel cell, and more particularly to a technique for cooling the gas and removing foreign substances in the gas, such as abrasion powder, from the gas.
- a cooling chamber is disposed adjacent to a compression chamber, and a gas cooler that has a gas passage leading to a discharge port is arranged adjacent to the cooling chamber. Therefore, heat is exchanged between coolant fluid in the cooling chamber and the discharged gas in the gas passage so that the discharged gas is cooled while the discharged gas passes through the gas passage.
- Japanese Unexamined Patent Publication No. 2000-213831 discloses a technique in which a filter is provided in a conduit for collecting the abrasion powder in the gas that flows in the conduit.
- the above filter collects abrasion powder that is produced in the compressor and that is discharged to the outside of the compressor with the gas so as to prevent the abrasion powder from flowing into the downstream device.
- there is a limit to enlarge a cross section of a filter passage Because of the small cross-sectional area, the filter is easily clogged, and the compression pressure is reduced.
- the present invention provides a technique to effectively cool gas and to simultaneously remove foreign substances from the gas in a compressor before the discharged gas from a discharge port flows out to an external circuit.
- a scroll type compressor includes a fixed scroll member and a movable scroll member to define compression chambers.
- the movable scroll member orbits relative to the fixed scroll member to compress gas in the compression chambers.
- the compressed gas is discharged to a discharge port.
- the compressor also includes a filter chamber and a cooling chamber.
- the filter chamber communicates with the discharge port for accommodating a first filter to at least partially filter the compressed gas.
- the cooling chamber is located adjacent to the filter chamber for containing coolant fluid that cools the compressed gas in the filter chamber.
- the present invention also provides a method of processing compressed gas in a compressor.
- the compressor forms a compression chambers for compressing the gas, a filter chamber having a filter and a cooling chamber that is located adjacent to the filter chamber for containing coolant fluid.
- the method includes the steps of transmitting cooling temperature of the coolant fluid to the filter chamber, cooling the compressed gas in the filter chamber and removing foreign substances in the compressed gas through the filter in the filter chamber simultaneously with the above cooling step.
- the present invention also provides a compressor for compressing gas.
- the compressor includes a filter chamber and a cooling chamber.
- the filter chamber accommodates a filter so as to at least partially filter the compressed gas.
- the cooling chamber is located adjacent to the filter chamber for containing coolant fluid so that cooling temperature of the coolant fluid is transmitted to the filter chamber.
- the present invention also provides a cooling circuit for cooling gas in a compressor that compresses the gas.
- the cooling circuit includes a filter chamber, a cooling chamber, a heat exchanger and a pump.
- the filter chamber is located in the compressor and accommodates a filter to filter at least partially the compressed gas.
- the cooling chamber is located in the compressor adjacent to the filter chamber for passing coolant fluid.
- the heat exchanger is connected to the cooling chamber for cooling the coolant fluid from the cooling chamber.
- the pump connected to the heat exchanger for supplying the coolant fluid to the cooling chamber.
- FIG. 1 is a longitudinal cross-sectional view of a scroll type compressor according to a first preferred embodiment of the present invention
- FIG. 2 is a cross-sectional view of the scroll type compressor taken along the line II-II in FIG. 1;
- FIG. 3 is a perspective view of a filter according to the first preferred embodiment of the present invention.
- FIG. 4 is a partially enlarged cross-sectional view of a scroll type compressor according to a second preferred embodiment of the present invention.
- FIG. 5 is a perspective view of a filter on an upstream side according to the second preferred embodiment of the present invention.
- FIG. 6 is a perspective view of a filter according to a first alternative embodiment of the present invention.
- FIG. 7 is a perspective view of a filter according to a second alternative embodiment of the present invention.
- FIG. 8 is a perspective view of a filter according to a third alternative embodiment of the present invention.
- FIG. 9 is a cross-sectional view showing a filter according to a fourth alternative embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing a support structure for a filter on an upstream side according to a fifth alternative embodiment
- FIG. 11 is a cross-sectional view showing a support structure for a filter on an upstream side according to a sixth alternative embodiment.
- FIG. 12 is a cross-sectional view showing an open-close structure of an escape passage for a filter on an upstream side according to a seventh alternative embodiment.
- FIG. 1 is a longitudinal cross-sectional view of a scroll type electric compressor 10 according to the first preferred embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the compressor 10 taken along the line II-II in FIG. 1.
- FIG. 3 is a perspective view of a filter. The left and right sides of FIG. 1 respectively correspond to the front and rear sides of the compressor 10 .
- the present preferred embodiment is applied for compressing gas, and it is more particularly applied for compressing air which is supplied to a fuel cell in an electric vehicle.
- An outer hull of the compressor 10 includes a front housing 11 and a rear housing 12 both of which are made of aluminum or aluminum alloy.
- a rotary shaft 13 is rotatably supported in the front and rear housings 11 and 12 .
- a rotor 14 constituting an electric motor M is rotatably mounted on the rotary shaft 13 in the rear housing 12 .
- a stator 16 constituting the electric motor M is fixedly arranged on the inner circumferential surface of the rear housing 12 so as to surround the rotor 14 .
- the front housing 11 includes a fixed scroll member 20 , a filter casing 41 and a support housing 21 .
- the filter casing 41 is fixedly joined to the front end of the fixed scroll member 20 .
- the support housing 21 is fixedly joined to the rear end of the fixed scroll member 20 and to the front end of the rear housing 12 .
- the fixed scroll member 20 includes a fixed base plate 20 a that has a substantially disc-shaped configuration and a fixed spiral wall 20 b that extends from the rear surface of the fixed base plate 20 a.
- a crankshaft 17 is provided at the front end of the rotary shaft 13 and is offset from an axis L of the rotary shaft 13 by a predetermined length E of eccentricity.
- a movable scroll member 24 is rotatably supported by the crankshaft 17 through a pair of bearings 25 so as to face the fixed scroll member 20 .
- the movable scroll member 24 includes a movable base plate 24 a that is substantially disc-shaped and a movable spiral wall 24 b that extends from the front surface of the movable base plate 24 b.
- the fixed and movable scroll members 20 and 24 are arranged so as to engage with each other.
- the distal end surfaces of the fixed and movable spiral walls 20 b and 24 b respectively contact the movable and fixed base plates 24 a and 20 a at tip seals 20 c and 24 c .
- the fixed spiral wall 20 b overlaps the movable spiral wall 24 b to contact each other at a plurality of points. Therefore, the fixed base plate 20 a and the fixed spiral wall 20 b of the fixed scroll member 20 as well as the movable base plate 24 a and the movable spiral wall 24 b of the movable scroll member 24 define a plurality of falcate compression chambers 26 .
- a boss 24 d is formed at the intermediate portion of the movable base plate 24 a of the movable scroll member 24 .
- the boss 24 d axially protrudes toward the front side of the compressor 10 .
- An inserting recess 24 e is formed in the boss 24 d for accepting the crankshaft 17 thereinto.
- a bottom wall 24 f of the boss 24 d is formed at the front side opposite to an opening and rear side where the crankshaft 17 is inserted.
- the crankshaft 17 protrudes from the movable base plate 24 a toward the fixed base plate 20 a . Consequently, the compressor 10 is shortened along the axis L of the rotary shaft 13 by a partial length of the crankshaft 17 that protrudes from the movable base plate 24 a toward the fixed base plate 20 a.
- a discharge port 20 d is formed in the center of the fixed base plate 20 a of the fixed scroll member 20 .
- a suction port 20 e is formed in the outer circumferential wall of the fixed scroll member 20 .
- a self-rotation preventing mechanism 31 includes a crankshaft 27 and bearings 28 and 29 . The self-rotation preventing mechanism 31 is located between the movable base plate 24 a of the movable scroll member 24 and the inner wall surface of the support housing 21 that faces the movable base plate 24 a of the movable scroll member 24 .
- the movable scroll member 24 orbits around the axis of the fixed scroll member 20 by the crankshaft 17 .
- the self-rotation preventing mechanism 31 prevents the movable scroll member 24 from self-rotating while it allows the movable scroll member 24 to orbit around the axis of the fixed scroll member 20 .
- the compression chambers 26 move inwardly from an outer circumferential side of the fixed and movable spiral walls 20 b and 24 b by the orbital movement, the compression chambers 26 reduce in volume. Thereby, the air introduced from the suction port 20 e into the compression chambers 26 is compressed. The compressed air is discharged from the compression chambers 26 to a filter chamber 44 through the discharge port 20 d when the compression chambers 26 have approached the center of the fixed base plate 20 a.
- a cooling chamber 32 is defined between the front surface of the fixed scroll member 20 and the filter casing 41 , the filter casing 41 is fixed to the fixed scroll member 20 .
- a recess 32 c is formed at the front side of the fixed base plate 20 a of the fixed scroll member 20 , and the filter casing 41 is fixed to the front surface of the fixed base plate 20 a so as to cover the recess 32 c .
- the cooling chamber 32 is adjacent to the compression chambers 26 across the fixed base plate 20 a.
- the cooling chamber 32 is formed in a substantially U-shaped manner so as to surround the discharge port 20 d .
- the cooling chamber 32 has a coolant inlet 32 a for flowing cooling water as coolant fluid into the cooling chamber 32 and a coolant outlet 32 b for removing the cooling water.
- a plurality of flow-dividing fins 33 is provided in the cooling chamber 32 .
- the flow-dividing fins 33 divide the flow of the cooling water flowing in from the coolant inlet 32 a , and the cooling water flows toward the coolant outlet 32 b .
- the flow-dividing fins 33 extend from the front surface of the fixed base plate 20 a of the fixed scroll member 20 .
- the cooling chamber 32 partially constitutes a cooling circuit. As shown in FIG.
- a heat exchanger and a 10 pump are provided in the cooling circuit.
- the heat exchanger cools the high-temperature cooling water that flows out from the coolant outlet 32 b .
- the pump supplies the cooling water that has been cooled into the cooling chamber 32 through the coolant inlet 32 a . Pure water generated by cell reaction at a fuel cell FC as shown in FIG. 1 is utilized as the cooling water that circulates in the cooling circuit.
- the filter casing 41 has a two-part structure including an inner casing 41 a at the rear side and an outer casing 41 b at the front side.
- the inner casing 41 a is fixed to the front surface of the fixed scroll member 20 by a predetermined number of bolts 42 while the outer casing 41 b is fixed to the inner casing 41 a by a predetermined number of bolts 43 .
- the outer casing 41 b is detachable from the inner casing 41 a .
- the outer casing 41 b is detached from the inner casing 41 a .
- the inner and outer casings 41 a and 41 b define the filter chamber 44 .
- the filter chamber 44 is adjacent to the cooling chamber 32 across the inner casing 41 a .
- the cooling chamber 32 is located between the compression chambers 26 and the filter chamber 44 .
- the inner casing 41 a contacts the flow-dividing fins 33 .
- the filter chamber 44 accommodates a filter 45 for removing foreign substances when the compressed air is introduced from the discharge port 20 d into the filter chamber 44 .
- the filter 45 includes a filter portion 45 a for removing the foreign substances and a frame 45 b arranged around the edges of the filter portion 45 a for supporting the filter portion 45 a.
- the filter 45 is schematically illustrated in FIG. 3.
- the frame 45 b preferably includes a rib 45 c for reinforcing.
- the filter portion 45 a is preferably a pleated type filter element that has been formed by bending a flat stainless screen in zigzags.
- the filter 45 is supported in such a manner that the filter 45 is sandwiched by the inner and outer casings 41 a and 41 b . As shown in FIG. 1, the filter portion 45 a is suspended in the filter chamber 44 .
- a communication hole 41 c is formed as an inlet in the center of the inner casing 41 a .
- the filter chamber 44 communicates with the discharge port 20 d of the compression chamber 26 through the communication hole 41 c .
- An outlet 41 d is formed in the center of the outer casing 41 b . That is, the compressed air discharged from the discharge port 20 d of the compression chamber 26 is inputted to the filter chamber 44 through the communication hole 41 c . After passing through the filter 45 , the compressed air is outputted through the outlet 41 d to the fuel cell FC, which is located outside of the compressor 10 .
- the compressed air flows in the filter chamber 44 substantially in the same direction as the compressed air flows in the discharge port 20 d as shown by an arrow in FIG. 1. Also, the filter 45 is located so as to be perpendicular to the above flow direction.
- the cooling water flows into the cooling chamber 32 from the coolant inlet 32 a .
- the cooling water flowing into the cooling chamber 32 cools the air that is being compressed in the compression chambers 26 and the discharged air in the filter chamber 44 .
- heat is exchanged between the cooling water in the cooling chamber 32 and the compressed air in the compression chambers 26 through the fixed base plate 20 a as well as between the cooling water and the compressed gas in the filter chamber 44 through the inner casing 41 a .
- cooling temperature of the cooling water is transmitted to the compressed air in the compression chambers 26 through the fixed base pate 20 a as well as the compressed gas in the filter chamber 44 through the inner casing 41 a .
- the cooling water that has been used for cooling flows out from the coolant outlet 32 b and is substantially cooled by the heat exchanger to circulate back into the cooling chamber 32 by the pump. Namely, as the cooling water circulates in the cooling circuit, the temperature of the cooling water repeatedly rises and lowers. A part of the cooling water that flows out from the coolant outlet 32 b is discarded, and the same amount of the pure water generated at the fuel cell FC is added into the cooling circuit for the discarded part.
- the movable spiral wall 24 b rotates relative to the fixed spiral wall 20 b while the movable spiral wall 24 b contacts the fixed spiral wall 20 b . That is, the movable spiral wall 24 b slides over the fixed spiral wall 20 b . Also, the tip seals 20 c and 24 c respectively slide over the movable and fixed base plate 24 a and 20 a . Thereby, sliding surfaces abrade to produce abrasion powder.
- the abrasion powder is mixed in the compressed air and is sent to the filter chamber 44 through the discharge port 20 d and the communication hole 41 c .
- the filter 45 collects the abrasion powder in the discharged air and the discharged air is cooled substantially at the same time. Namely, as the abrasion powder is removed from the discharged air in the filter chamber 44 by the filter 45 , the cooling water in the cooling chamber 32 cools the discharged air.
- the filtered air having a low temperature is outputted to the outside or an external circuit of the compressor 10 from the outlet 41 d.
- the filter chamber 44 accommodating the filter 45 is formed in the compressor 10 and is adjacent to the cooling chamber 32 . Accordingly, since cleaning and cooling of the discharged air are simultaneously conducted in one space, the space is efficiently and logically utilized. Also, since the cooling chamber 32 is adjacent to the compression chambers 26 , cooling action is applied to the compressed air in the compression chambers 26 and the filter chamber 44 . Accordingly, the compressed air is effectively cooled.
- the filter chamber 44 is formed in the compressor 10 .
- a conduit in the external circuit is generally not large enough in diameter for efficient circulation.
- a filter area size is limited to a small cross-sectional area of the conduit in the external circuit. No significant limitation is applicable for the cross-sectional size in the present preferred embodiment since the filter is in the compressor.
- the filter 45 is enlarged in the preferred embodiment in an orthogonal direction relative to the compressed air flow direction in which the compressed air flows in the filter chamber 44 . Based on this design, the area of the filter 45 is substantially larger than that in the external circuit, and the capacity for collecting the foreign substances is also substantially enhanced. Consequently, since a flow rate of the air is reduced due to the large area, cooling time of the compressed air in the filter chamber 44 is longer, and a strong cooling effect is obtained.
- the cooling chamber 32 is formed between the compression chambers 26 and the filter chamber 44 .
- the heat is exchanged between the cooling water in the cooling chamber 32 and the compressed air to cool the compressed air in the compression chambers 26 and the filter chamber 44 . Therefore, in comparison to cooling the compressed air only in the filter chamber 44 , the cooling effect on the air is further enhanced.
- the filter casing 41 has the two-part structure including the inner and outer casings 41 a and 41 b .
- the inner casing 41 a is fixed to the fixed scroll member 20
- the outer casing 41 b is detachably fixed to the inner casing 41 a . Since the outer casing 41 b is detached from the inner casing 41 a as necessary, the filter 45 in the filter chamber 44 is easily replaced or cleaned.
- the filter casing 41 is connected to the fixed scroll member 20 so as to provide the filter chamber 44 .
- a filter casing is newly placed to a housing so that a filter chamber is newly provided for the existing compressor. Therefore, the above simple design change enables the existing scroll type electric compressor to cool air and remove foreign substances.
- a plurality of the flow-dividing fins 33 is provided in the cooling chamber 32 and protrudes from the fixed base plate 20 a of the fixed scroll member 20 .
- the flow-dividing fins 33 contact the inner casing 41 a .
- a heat transfer area between the cooling chamber 32 and the compression chambers 26 as well as between cooling chamber 32 and the filter chamber 44 is increased. Consequently, the cooling effect is enhanced.
- FIG. 4 is a partially enlarged cross-sectional view of a scroll type compressor according to the second preferred embodiment of the present invention.
- an additional filter 55 is added in the filter chamber 44 on an upstream side, that is, a rear side as indicated in the right in FIG. 4 relative to the filter 45 of the above-described first preferred embodiment.
- the two filters 45 and 55 are located along the compressed air flow direction.
- the filter 55 located at the upstream side and the filter 45 located at a downstream side or the front side are respectively referred to as a first filter and a second filter. Since the second filter 45 has substantially the same structure as in the first preferred embodiment, the description for the second filter 45 is omitted.
- the first filter 55 includes a filter portion 55 a for removing the foreign substances and a frame 55 b arranged around the edges of the filter portion 55 a for supporting the filter portion 55 a .
- the frame 55 b preferably includes a rib 55 c for reinforcing.
- the filter portion 55 a is preferably a pleated type filter element that a flat stainless screen is bent in zigzags as similarly done to the filter portion 45 a of the second filter 45 as described with respect to FIG. 3.
- filter elements made of material such as steel, aluminum alloy, resin and fabric are also used for either of the first and second filter portions 55 a and 45 a .
- the first and second filter portions 55 a and 45 a have a micro structure or a mesh in which circular or square pores are formed in a plate material.
- a plurality of mounting portions or first filter mounting portions 55 d is formed at the periphery of the frame 55 b .
- Two mounting portions 55 d are shown in FIG. 5.
- the end portions of the mounting portions 55 d are outwardly bent.
- the end portion of each mounting portion 55 d is fixed to an inner surface of the inner casing 41 a by a bolt 57 so that the first filter 55 is supported in the filter chamber 44 as shown in FIG. 4.
- the filter portion 55 a of the first filter 55 is supported in the filter chamber 44 .
- an escape passage 56 bypasses the first filter 55 and leads to the second filter 45 .
- the first and second filters 55 and 45 are placed at a predetermined interval along the compressed air flow direction or a horizontal direction in FIG. 4.
- the first and second filters 55 and 45 are both located so as to face the discharge port 20 d . Namely, the first and second filters 55 and 45 are located so as to be perpendicular to the compressed air flow direction in the filter chamber 44 .
- a mesh size M 1 of the first filter 55 and a mesh size M 2 of the second filter 45 preferably satisfy the following inequality.
- the mesh size is determined by the number of mesh openings in a square inch.
- the mesh size M 1 and M 2 of the first and second filters 55 and 45 satisfy the following inequality:
- the mesh size M 1 of the first filter 55 is smaller than the mesh size M 2 of the second filter 45 . More precisely, the mesh size of the first filter portion 55 a in the first filter 55 ranges from 25 to 40 while the mesh size of the second filter portion 45 a in the second filter 45 is approximately 100.
- a receiving area A 1 of the filter portion 55 a and a receiving area A 2 of the filter portion 45 a preferably satisfy the following inequality.
- the receiving area of the filter in the present specification means the area of the filter portion that receives the compressed air.
- the receiving areas A 1 and A 2 of the first and second filters 55 and 45 satisfy the following inequality:
- the receiving area A 1 of the first filter 55 on the upstream side is smaller than the receiving area A 2 of the second filter 45 on the downstream side.
- the compressed air is discharged from the discharge port 20 d and is sent to the filter chamber 44 through the communication hole 41 c .
- the compressed air passes through the first and second filters 55 and 45 in this order. Therefore, the foreign substances such as the abrasion powder mixed in the compressed air are collected by the first and second filters 55 and 45 , and the compressed air is cooled by the cooling water in the cooling chamber 32 . Then, the filtered compressed air at a lower temperature is outputted from the outlet 45 d to the external circuit of the compressor 10 .
- the foreign substances such as the abrasion powder mixed in the compressed air are collected by the first and second filters 55 and 45 in a sequential manner so that the compressed air is cleaned through two filters over a longer period of time. Also, as the air flowing in the filer chamber 44 passes through the two filters 55 and 45 , the flow rate of the air is further reduced. Therefore, the compressed air is effectively cooled.
- the escape passage 56 is formed so that the compressed air bypasses the first filter 55 .
- the escape passage 56 includes the space between the first filter 55 and the inner casing 41 a as indicated by “X” in FIG. 5. If the first filter 55 is clogged, the compressed air bypasses the first filter 55 through the escape passage 56 .
- the escape passage 56 are formed so as to bypass the first filter 55 that is located on the upstream side.
- the foreign substances in the compressed air are eventually collected by the second filter 45 on the downstream side. Consequently, the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected.
- the second filter 45 is clogged, the first and second filters 55 and 45 are replaced or cleaned. Without replacement or cleaning, the amount of clogged material on the second filter 45 is one indication of remaining life of the compressor 10 .
- the first and second filters 55 and 45 are located so as to face the discharge port 20 d .
- the compressed air discharged from the discharge port 20 d effectively passes through the two filters 55 and 45 . Consequently, the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected.
- the two filters 55 and 45 are compactly installed in the compressor 10 .
- the mesh size M 1 of the first filter 55 is smaller than the mesh size M 2 of the second filter 45 .
- the foreign substances such as the abrasion powder mixed in the compressed air are collected separately according to the size through the first filter 55 on the upstream side and then the second filter 45 on the downstream side.
- the receiving area A 1 of the first filter 55 on the upstream side is smaller than the receiving area A 2 of the second filter 45 on the downstream side.
- the compressed air smoothly flows toward the second filter 45 on the downstream side after passing through the first filter 55 on the upstream side so that the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected.
- the second filter 45 is located on the downstream side with respect to first filter 55 , and an escape passage is not formed at the second filter 45 .
- the foreign substances in the compressed air are eventually collected by the second filter 45 . It is possible to avoid the flow of the foreign substances to the external circuit of the compressor 10 due to the insufficient cleaning which is expected when the compressed air supposedly bypasses the second filter 45 .
- the shapes of the first and second filters 55 and 45 are circular in the above-described preferred embodiments. However, the outer shapes of the first and second filters 55 and 45 are changed.
- the shape of at least one of the first and second filters 55 and 45 is substantially rectangular as shown in FIG. 6.
- the shape of at least one of the first and second filters 55 and 45 is substantially semicircular as shown in FIG. 7.
- the filter 55 or 45 has a substantially rectangular shape, and the shape of the filter portion 55 a or 45 a is different from the shape of the frame 55 b or 45 b in a third alternative embodiment.
- the filter portion 55 a or 45 a avoids holes H 1 for inserting bolts and a hole H 2 that leads to the coolant inlet 32 a or the coolant outlet 32 b of the cooling chamber 32 as shown in FIG. 2, which are formed in the frame 55 b or 45 b .
- the shape of the filter portion 55 a or 45 a is appropriately changed in accordance with the design requirements including the location for inserting bolts, the location for the coolant inlet 32 a and the coolant outlet 32 b of the cooling chamber 32 , and the location for the communication hole 41 c and the outlet 41 d of the filter chamber 44 in the filter casing 41 .
- the first and second filters 55 and 45 have planar shapes in the above-described preferred embodiment. However, in a fourth alternative embodiment, the first and second filters 55 and 45 have substantially hemispherical shapes as shown in FIG. 9.
- the first filter 55 is connected to the inner casing 41 a of the filter casing 41 in the above-described second preferred embodiment.
- the first filter 55 is connected to the frame 45 b of the second filter 45 in a fifth alternative embodiment.
- the end portion of each mounting portion 55 d of the frame 55 b of the first filter 55 is similarly fixed to the frame 45 b of the second filter 45 by a bolt that is not shown in the drawings as the above description.
- the filter portion 55 a of the first filter 55 is suspended in the filter chamber 44 , and a part of the escape passage 56 is formed between the frame 55 b of the first filter 55 and the inner casing 41 a.
- the frame 45 b of the second filter 45 and the frame 55 b of the first filter 55 are sandwiched between the inner and outer casings 41 a and 41 b in a sixth alternative embodiment.
- the frame 45 b of the second filter 45 and the frame 55 b of the first filter 55 are supported.
- a ring-shaped spacer 50 is interposed between the first filter frame 55 b and the second filter frame 45 b . Therefore, an interval is maintained between the first and second filters 55 and 45 .
- an escape passage 56 includes through holes that are formed in the first filter frame 55 b .
- the spacer 50 is formed integrally with either of the first filter frame 55 b or the second filter frame 45 b , and the number of components is reduced.
- an escape passage 56 at the first filter 55 is formed so as to be opened and closed by an open-close means in a seventh alternative embodiment.
- the open-close means closes the escape passage 56 when the compressed air pressure on the upstream side relative to the first filter 55 is smaller than a predetermined pressure.
- the open-close means opens the escape passage 56 when the compressed air pressure on the upstream side relative to the first filter 55 is equal to or larger than the predetermined pressure.
- a support member 58 is arranged at the inner casing 41 a .
- the support member 58 includes a fixed support portion 58 a that has a ring shape and a plurality of movable support portions 58 b that extends from the fixed support portion 58 a .
- the fixed support portion 58 a is fixed to the inner casing 41 a .
- the end portions of the movable support portions 58 b movably support the first filter frame 55 b in an axial direction as shown in a horizontal direction in FIG. 12.
- the movable support portions 58 b are arranged in a circumferential direction of the support member 58 . Therefore, a part of the escape passage 56 is formed between the movable support portions 58 b .
- the first filter frame 55 b contacts the fixed support portion 58 a to close the escape passage 56 as shown by a solid line in FIG. 12.
- the first filter frame 55 b separates itself from the fixed support portion 58 a to open the escape passage 56 as shown by a double-dotted line in FIG. 12.
- an elastic member 59 such as a coil spring is interposed between the first filter frame 55 b and the movable support portions 58 b for urging the first filter 55 in a direction in which the escape passage 56 are closed or rightward in FIG. 12. That is, the direction is to urge the first filter 55 to close the escape passage 56 .
- the first filter 55 , the support member 58 and the elastic member 59 constitute an open-close means of the present invention.
- the first filter 55 is urged by the elastic member 59 to close the escape passage 56 when the first filter 55 is at a position as shown by the solid line in FIG. 12.
- the compressed air discharged from the discharge port 20 d through the communication hole 41 c passes through the first filter 55 . Consequently, the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected by the first filter 55 .
- the first filter 55 when the first filter 55 is clogged and the compressed air pressure on the upstream side relative to the first filter 55 is equal to or more than the predetermined pressure, the first filter 55 is forced to move against the urging of the elastic member 59 to open the escape passage 56 at a position as shown by the double-dotted line in FIG. 12. Thereby, the compressed air bypasses the first filter 55 through the opened escape passage 56 . Consequently, the pressure loss due to the clogging of the first filter 55 is substantially prevented or reduced. As described above, even though the first filter 55 is clogged, the compressor 10 effectively performs without cleaning or replacing the clogged filter 55 . Thus, the life of the scroll compressor 10 is extended beyond the point when the first filter 55 is clogged.
- the first filter 55 Since the first filter 55 , the support member 58 and the elastic member 59 constitute the open-close means according to the present invention as described above, the first filter 55 effectively functions as a valve body. Meanwhile, instead of the above open-close means, another alternative embodiment utilizes a known escape valve at an escape passage in the filter casing 41 for bypassing the first filter 55 .
- an escape passage is similarly formed so as to be opened and closed by an open-close means as in the above first filter 55 .
- the open-close means usually closes the escape passage while the open-close means opens the escape passage when the pressure of the compressed air on the upstream side relative to the second filter 45 is equal to or larger than a predetermined pressure.
- the recess 32 c is formed in the fixed base plate 20 a of the fixed scroll member 20 for defining the cooling chamber 32 in the above-described preferred embodiments.
- the recess 32 c is formed in the inner casing 41 a of the filter casing 41 , or in both the fixed base plate 20 a and the inner casing 41 a.
- an additional cooling chamber is defined on the front side of the filter casing 41 for cooling the discharged air in the filter chamber 44 from both the front side and the rear side of the filter chamber 44 .
- the flow-dividing fins 33 are formed in the cooling chamber 32 .
- the flow-dividing fins 33 are formed on the rear side of the inner casing 41 a of the filter casing 41 , or are omitted.
- the above-described preferred embodiments apply to the compressor for compressing the gas, more particularly the air, which is supplied to the fuel cell FC of the electric vehicle.
- the present invention is applied to a compressor in an air conditioner or a refrigerating device.
- the two filters 55 and 45 in the second preferred embodiment are located. However, in a thirteenth alternative embodiment, three filters or more are located along the flow direction of the gas. An escape passage is formed so as to bypass at least one of the filters. Also, the first and second filters 55 and 45 are located so as to be offset from the discharge port 20 d and do not face the discharge port 20 d.
- the present invention is applied to a scroll type compressor.
- the present invention is also applied to other type compressors.
Abstract
A scroll type compressor includes a fixed scroll member and a movable scroll member to define compression chambers. The movable scroll member orbits relative to the fixed scroll member to compress gas in the compression chambers. The compressed gas is discharged to a discharge port. The compressor also includes a filter chamber and a cooling chamber. The filter chamber communicates with the discharge port for accommodating a first filter to at least partially filter the compressed gas. The cooling chamber is located adjacent to the filter chamber for containing coolant fluid that cools the compressed gas in the filter chamber.
Description
- The present invention relates to a compressor that compresses gas to be supplied preferably to a fuel cell, and more particularly to a technique for cooling the gas and removing foreign substances in the gas, such as abrasion powder, from the gas.
- In a scroll type compressor, as gas is compressed, the temperature of the gas rises. Then, the compressed gas is discharged from a compression chamber. When the discharged gas at a high temperature flows out from the compressor to an external circuit, it is possible for the high temperature gas to give a thermally adverse effect to a device on a downstream side in the external circuit. As disclosed in Japanese Unexamined Patent Publication No. 2002-295386, a technique is known to avoid such thermally adverse effect on the downstream device, and the gas is cooled to a temperature that gives no thermally adverse effect to the downstream device before the gas flows out of a compressor. In the above cooling technique, a cooling chamber is disposed adjacent to a compression chamber, and a gas cooler that has a gas passage leading to a discharge port is arranged adjacent to the cooling chamber. Therefore, heat is exchanged between coolant fluid in the cooling chamber and the discharged gas in the gas passage so that the discharged gas is cooled while the discharged gas passes through the gas passage.
- Meanwhile, when the scroll type compressor is operated, spiral walls of movable and fixed scroll members slide relative to each other, and tip seals at the axially distal ends of the spiral walls slide relative to base plates of the scroll members. Sliding surfaces abrade due to these sliding actions, and the abrasion produces abrasion powder. The abrasion powder is mixed in the gas and flows out to the external circuit. Although it adversely affects the downstream device, preventive measures against such abrasion powder have not been taken in the scroll type compressor in prior art.
- Incidentally, Japanese Unexamined Patent Publication No. 2000-213831 discloses a technique in which a filter is provided in a conduit for collecting the abrasion powder in the gas that flows in the conduit. The above filter collects abrasion powder that is produced in the compressor and that is discharged to the outside of the compressor with the gas so as to prevent the abrasion powder from flowing into the downstream device. However, in the above structure, there is a limit to enlarge a cross section of a filter passage. Because of the small cross-sectional area, the filter is easily clogged, and the compression pressure is reduced.
- The present invention provides a technique to effectively cool gas and to simultaneously remove foreign substances from the gas in a compressor before the discharged gas from a discharge port flows out to an external circuit.
- According to the present invention, a scroll type compressor includes a fixed scroll member and a movable scroll member to define compression chambers. The movable scroll member orbits relative to the fixed scroll member to compress gas in the compression chambers. The compressed gas is discharged to a discharge port. The compressor also includes a filter chamber and a cooling chamber. The filter chamber communicates with the discharge port for accommodating a first filter to at least partially filter the compressed gas. The cooling chamber is located adjacent to the filter chamber for containing coolant fluid that cools the compressed gas in the filter chamber.
- The present invention also provides a method of processing compressed gas in a compressor. The compressor forms a compression chambers for compressing the gas, a filter chamber having a filter and a cooling chamber that is located adjacent to the filter chamber for containing coolant fluid. The method includes the steps of transmitting cooling temperature of the coolant fluid to the filter chamber, cooling the compressed gas in the filter chamber and removing foreign substances in the compressed gas through the filter in the filter chamber simultaneously with the above cooling step.
- The present invention also provides a compressor for compressing gas. The compressor includes a filter chamber and a cooling chamber. The filter chamber accommodates a filter so as to at least partially filter the compressed gas. The cooling chamber is located adjacent to the filter chamber for containing coolant fluid so that cooling temperature of the coolant fluid is transmitted to the filter chamber.
- The present invention also provides a cooling circuit for cooling gas in a compressor that compresses the gas. The cooling circuit includes a filter chamber, a cooling chamber, a heat exchanger and a pump. The filter chamber is located in the compressor and accommodates a filter to filter at least partially the compressed gas. The cooling chamber is located in the compressor adjacent to the filter chamber for passing coolant fluid. The heat exchanger is connected to the cooling chamber for cooling the coolant fluid from the cooling chamber. The pump connected to the heat exchanger for supplying the coolant fluid to the cooling chamber.
- The features of the present invention that are believed to be novel are set forth with particularity in the appended claims. The invention together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
- FIG. 1 is a longitudinal cross-sectional view of a scroll type compressor according to a first preferred embodiment of the present invention;
- FIG. 2 is a cross-sectional view of the scroll type compressor taken along the line II-II in FIG. 1;
- FIG. 3 is a perspective view of a filter according to the first preferred embodiment of the present invention;
- FIG. 4 is a partially enlarged cross-sectional view of a scroll type compressor according to a second preferred embodiment of the present invention;
- FIG. 5 is a perspective view of a filter on an upstream side according to the second preferred embodiment of the present invention;
- FIG. 6 is a perspective view of a filter according to a first alternative embodiment of the present invention;
- FIG. 7 is a perspective view of a filter according to a second alternative embodiment of the present invention;
- FIG. 8 is a perspective view of a filter according to a third alternative embodiment of the present invention;
- FIG. 9 is a cross-sectional view showing a filter according to a fourth alternative embodiment of the present invention;
- FIG. 10 is a cross-sectional view showing a support structure for a filter on an upstream side according to a fifth alternative embodiment;
- FIG. 11 is a cross-sectional view showing a support structure for a filter on an upstream side according to a sixth alternative embodiment; and
- FIG. 12 is a cross-sectional view showing an open-close structure of an escape passage for a filter on an upstream side according to a seventh alternative embodiment.
- A first preferred embodiment will be now described in reference to FIGS. 1 through 3. FIG. 1 is a longitudinal cross-sectional view of a scroll type
electric compressor 10 according to the first preferred embodiment of the present invention. FIG. 2 is a cross-sectional view of thecompressor 10 taken along the line II-II in FIG. 1. FIG. 3 is a perspective view of a filter. The left and right sides of FIG. 1 respectively correspond to the front and rear sides of thecompressor 10. - The present preferred embodiment is applied for compressing gas, and it is more particularly applied for compressing air which is supplied to a fuel cell in an electric vehicle. An outer hull of the
compressor 10 includes afront housing 11 and arear housing 12 both of which are made of aluminum or aluminum alloy. Arotary shaft 13 is rotatably supported in the front andrear housings rotor 14 constituting an electric motor M is rotatably mounted on therotary shaft 13 in therear housing 12. Astator 16 constituting the electric motor M is fixedly arranged on the inner circumferential surface of therear housing 12 so as to surround therotor 14. - The
front housing 11 includes afixed scroll member 20, afilter casing 41 and asupport housing 21. Thefilter casing 41 is fixedly joined to the front end of the fixedscroll member 20. Thesupport housing 21 is fixedly joined to the rear end of the fixedscroll member 20 and to the front end of therear housing 12. The fixedscroll member 20 includes a fixedbase plate 20 a that has a substantially disc-shaped configuration and a fixedspiral wall 20 b that extends from the rear surface of the fixedbase plate 20 a. - A
crankshaft 17 is provided at the front end of therotary shaft 13 and is offset from an axis L of therotary shaft 13 by a predetermined length E of eccentricity. Amovable scroll member 24 is rotatably supported by thecrankshaft 17 through a pair ofbearings 25 so as to face the fixedscroll member 20. Themovable scroll member 24 includes amovable base plate 24 a that is substantially disc-shaped and amovable spiral wall 24 b that extends from the front surface of themovable base plate 24 b. - The fixed and
movable scroll members movable spiral walls base plates spiral wall 20 b overlaps themovable spiral wall 24 b to contact each other at a plurality of points. Therefore, the fixedbase plate 20 a and the fixedspiral wall 20 b of the fixedscroll member 20 as well as themovable base plate 24 a and themovable spiral wall 24 b of themovable scroll member 24 define a plurality offalcate compression chambers 26. - A
boss 24 d is formed at the intermediate portion of themovable base plate 24 a of themovable scroll member 24. Theboss 24 d axially protrudes toward the front side of thecompressor 10. An insertingrecess 24 e is formed in theboss 24 d for accepting thecrankshaft 17 thereinto. In the insertingrecess 24 e, abottom wall 24 f of theboss 24 d is formed at the front side opposite to an opening and rear side where thecrankshaft 17 is inserted. Thus, thecrankshaft 17 protrudes from themovable base plate 24 a toward the fixedbase plate 20 a. Consequently, thecompressor 10 is shortened along the axis L of therotary shaft 13 by a partial length of thecrankshaft 17 that protrudes from themovable base plate 24 a toward the fixedbase plate 20 a. - A
discharge port 20 d is formed in the center of the fixedbase plate 20 a of the fixedscroll member 20. Asuction port 20 e is formed in the outer circumferential wall of the fixedscroll member 20. A self-rotation preventing mechanism 31 includes acrankshaft 27 andbearings rotation preventing mechanism 31 is located between themovable base plate 24 a of themovable scroll member 24 and the inner wall surface of thesupport housing 21 that faces themovable base plate 24 a of themovable scroll member 24. - As the
rotary shaft 13 is rotated by the electric motor M, themovable scroll member 24 orbits around the axis of the fixedscroll member 20 by thecrankshaft 17. At the same time, the self-rotation preventing mechanism 31 prevents themovable scroll member 24 from self-rotating while it allows themovable scroll member 24 to orbit around the axis of the fixedscroll member 20. As thecompression chambers 26 move inwardly from an outer circumferential side of the fixed andmovable spiral walls compression chambers 26 reduce in volume. Thereby, the air introduced from thesuction port 20 e into thecompression chambers 26 is compressed. The compressed air is discharged from thecompression chambers 26 to afilter chamber 44 through thedischarge port 20 d when thecompression chambers 26 have approached the center of the fixedbase plate 20 a. - A cooling
chamber 32 is defined between the front surface of the fixedscroll member 20 and thefilter casing 41, thefilter casing 41 is fixed to the fixedscroll member 20. Specifically, arecess 32 c is formed at the front side of the fixedbase plate 20 a of the fixedscroll member 20, and thefilter casing 41 is fixed to the front surface of the fixedbase plate 20 a so as to cover therecess 32 c. Accordingly, the coolingchamber 32 is adjacent to thecompression chambers 26 across the fixedbase plate 20 a. - As shown in FIG. 2, the cooling
chamber 32 is formed in a substantially U-shaped manner so as to surround thedischarge port 20 d. The coolingchamber 32 has acoolant inlet 32 a for flowing cooling water as coolant fluid into the coolingchamber 32 and acoolant outlet 32 b for removing the cooling water. A plurality of flow-dividingfins 33 is provided in the coolingchamber 32. The flow-dividingfins 33 divide the flow of the cooling water flowing in from thecoolant inlet 32 a, and the cooling water flows toward thecoolant outlet 32 b. In the present preferred embodiment, the flow-dividingfins 33 extend from the front surface of the fixedbase plate 20 a of the fixedscroll member 20. The coolingchamber 32 partially constitutes a cooling circuit. As shown in FIG. 2, a heat exchanger and a 10 pump are provided in the cooling circuit. The heat exchanger cools the high-temperature cooling water that flows out from thecoolant outlet 32 b. The pump supplies the cooling water that has been cooled into the coolingchamber 32 through thecoolant inlet 32 a. Pure water generated by cell reaction at a fuel cell FC as shown in FIG. 1 is utilized as the cooling water that circulates in the cooling circuit. - Referring back to FIG. 1, the
filter casing 41 has a two-part structure including aninner casing 41 a at the rear side and anouter casing 41 b at the front side. Theinner casing 41 a is fixed to the front surface of the fixedscroll member 20 by a predetermined number ofbolts 42 while theouter casing 41 b is fixed to theinner casing 41 a by a predetermined number ofbolts 43. Namely, theouter casing 41 b is detachable from theinner casing 41 a. As necessary, theouter casing 41 b is detached from theinner casing 41 a. The inner andouter casings filter chamber 44. Thefilter chamber 44 is adjacent to the coolingchamber 32 across theinner casing 41 a. Namely, the coolingchamber 32 is located between thecompression chambers 26 and thefilter chamber 44. Also, theinner casing 41 a contacts the flow-dividingfins 33. - Still referring to FIGS. 1 and 2, the
filter chamber 44 accommodates afilter 45 for removing foreign substances when the compressed air is introduced from thedischarge port 20 d into thefilter chamber 44. Thefilter 45 includes afilter portion 45 a for removing the foreign substances and aframe 45 b arranged around the edges of thefilter portion 45 a for supporting thefilter portion 45 a. - The
filter 45 is schematically illustrated in FIG. 3. In thefilter 45, theframe 45 b preferably includes arib 45 c for reinforcing. In order to enhance capacity for collecting the foreign substances and cooling effect, thefilter portion 45 a is preferably a pleated type filter element that has been formed by bending a flat stainless screen in zigzags. Thefilter 45 is supported in such a manner that thefilter 45 is sandwiched by the inner andouter casings filter portion 45 a is suspended in thefilter chamber 44. - Referring to FIG. 1, a
communication hole 41 c is formed as an inlet in the center of theinner casing 41 a. Thefilter chamber 44 communicates with thedischarge port 20 d of thecompression chamber 26 through thecommunication hole 41 c. Anoutlet 41 d is formed in the center of theouter casing 41 b. That is, the compressed air discharged from thedischarge port 20 d of thecompression chamber 26 is inputted to thefilter chamber 44 through thecommunication hole 41 c. After passing through thefilter 45, the compressed air is outputted through theoutlet 41 d to the fuel cell FC, which is located outside of thecompressor 10. The compressed air flows in thefilter chamber 44 substantially in the same direction as the compressed air flows in thedischarge port 20 d as shown by an arrow in FIG. 1. Also, thefilter 45 is located so as to be perpendicular to the above flow direction. - Referring to FIGS. 1 and 2, as the
compressor 10 is operated, the cooling water flows into the coolingchamber 32 from thecoolant inlet 32 a. The cooling water flowing into the coolingchamber 32 cools the air that is being compressed in thecompression chambers 26 and the discharged air in thefilter chamber 44. Namely, heat is exchanged between the cooling water in the coolingchamber 32 and the compressed air in thecompression chambers 26 through the fixedbase plate 20 a as well as between the cooling water and the compressed gas in thefilter chamber 44 through theinner casing 41 a. More specifically, cooling temperature of the cooling water is transmitted to the compressed air in thecompression chambers 26 through the fixedbase pate 20 a as well as the compressed gas in thefilter chamber 44 through theinner casing 41 a. The cooling water that has been used for cooling flows out from thecoolant outlet 32 b and is substantially cooled by the heat exchanger to circulate back into the coolingchamber 32 by the pump. Namely, as the cooling water circulates in the cooling circuit, the temperature of the cooling water repeatedly rises and lowers. A part of the cooling water that flows out from thecoolant outlet 32 b is discarded, and the same amount of the pure water generated at the fuel cell FC is added into the cooling circuit for the discarded part. - In accordance with the operation of the
compressor 10, themovable spiral wall 24 b rotates relative to the fixedspiral wall 20 b while themovable spiral wall 24 b contacts the fixedspiral wall 20 b. That is, themovable spiral wall 24 b slides over the fixedspiral wall 20 b. Also, the tip seals 20 c and 24 c respectively slide over the movable and fixedbase plate filter chamber 44 through thedischarge port 20 d and thecommunication hole 41 c. When the discharged air passes through thefilter 45 in thefilter chamber 44, thefilter 45 collects the abrasion powder in the discharged air and the discharged air is cooled substantially at the same time. Namely, as the abrasion powder is removed from the discharged air in thefilter chamber 44 by thefilter 45, the cooling water in the coolingchamber 32 cools the discharged air. The filtered air having a low temperature is outputted to the outside or an external circuit of thecompressor 10 from theoutlet 41 d. - In the first preferred embodiment, following effects are obtained. As described above, in the present preferred embodiment, the
filter chamber 44 accommodating thefilter 45 is formed in thecompressor 10 and is adjacent to the coolingchamber 32. Accordingly, since cleaning and cooling of the discharged air are simultaneously conducted in one space, the space is efficiently and logically utilized. Also, since the coolingchamber 32 is adjacent to thecompression chambers 26, cooling action is applied to the compressed air in thecompression chambers 26 and thefilter chamber 44. Accordingly, the compressed air is effectively cooled. - Also, in the present preferred embodiment, the
filter chamber 44 is formed in thecompressor 10. In this regard, a conduit in the external circuit is generally not large enough in diameter for efficient circulation. A filter area size is limited to a small cross-sectional area of the conduit in the external circuit. No significant limitation is applicable for the cross-sectional size in the present preferred embodiment since the filter is in the compressor. Thefilter 45 is enlarged in the preferred embodiment in an orthogonal direction relative to the compressed air flow direction in which the compressed air flows in thefilter chamber 44. Based on this design, the area of thefilter 45 is substantially larger than that in the external circuit, and the capacity for collecting the foreign substances is also substantially enhanced. Consequently, since a flow rate of the air is reduced due to the large area, cooling time of the compressed air in thefilter chamber 44 is longer, and a strong cooling effect is obtained. - In the present preferred embodiment, the cooling
chamber 32 is formed between thecompression chambers 26 and thefilter chamber 44. The heat is exchanged between the cooling water in the coolingchamber 32 and the compressed air to cool the compressed air in thecompression chambers 26 and thefilter chamber 44. Therefore, in comparison to cooling the compressed air only in thefilter chamber 44, the cooling effect on the air is further enhanced. - In the present preferred embodiment, the
filter casing 41 has the two-part structure including the inner andouter casings inner casing 41 a is fixed to the fixedscroll member 20, and theouter casing 41 b is detachably fixed to theinner casing 41 a. Since theouter casing 41 b is detached from theinner casing 41 a as necessary, thefilter 45 in thefilter chamber 44 is easily replaced or cleaned. Also, thefilter casing 41 is connected to the fixedscroll member 20 so as to provide thefilter chamber 44. To an existing compressor, a filter casing is newly placed to a housing so that a filter chamber is newly provided for the existing compressor. Therefore, the above simple design change enables the existing scroll type electric compressor to cool air and remove foreign substances. - A plurality of the flow-dividing
fins 33 is provided in the coolingchamber 32 and protrudes from the fixedbase plate 20 a of the fixedscroll member 20. The flow-dividingfins 33 contact theinner casing 41 a. Thus, a heat transfer area between the coolingchamber 32 and thecompression chambers 26 as well as between coolingchamber 32 and thefilter chamber 44 is increased. Consequently, the cooling effect is enhanced. - A second preferred embodiment will be now described in reference to FIGS. 4 and 5. Since the second preferred embodiment is modified from the above-described first preferred embodiment, only the modified parts will be described, and the same description will be omitted. FIG. 4 is a partially enlarged cross-sectional view of a scroll type compressor according to the second preferred embodiment of the present invention. As shown in FIG. 4, in the present preferred embodiment, an
additional filter 55 is added in thefilter chamber 44 on an upstream side, that is, a rear side as indicated in the right in FIG. 4 relative to thefilter 45 of the above-described first preferred embodiment. The twofilters filter 55 located at the upstream side and thefilter 45 located at a downstream side or the front side are respectively referred to as a first filter and a second filter. Since thesecond filter 45 has substantially the same structure as in the first preferred embodiment, the description for thesecond filter 45 is omitted. - As schematically shown in FIG. 5, the
first filter 55 includes afilter portion 55 a for removing the foreign substances and aframe 55 b arranged around the edges of thefilter portion 55 a for supporting thefilter portion 55 a. Theframe 55 b preferably includes arib 55 c for reinforcing. In order to enhance the capacity for collecting the foreign substances and the cooling effect, thefilter portion 55 a is preferably a pleated type filter element that a flat stainless screen is bent in zigzags as similarly done to thefilter portion 45 a of thesecond filter 45 as described with respect to FIG. 3. In addition to the stainless filter element, filter elements made of material such as steel, aluminum alloy, resin and fabric are also used for either of the first andsecond filter portions second filter portions - A plurality of mounting portions or first
filter mounting portions 55 d is formed at the periphery of theframe 55 b. Two mountingportions 55 d are shown in FIG. 5. The end portions of the mountingportions 55 d are outwardly bent. The end portion of each mountingportion 55 d is fixed to an inner surface of theinner casing 41 a by abolt 57 so that thefirst filter 55 is supported in thefilter chamber 44 as shown in FIG. 4. Thereby, thefilter portion 55 a of thefirst filter 55 is supported in thefilter chamber 44. Also, anescape passage 56 bypasses thefirst filter 55 and leads to thesecond filter 45. The first andsecond filters second filters discharge port 20 d. Namely, the first andsecond filters filter chamber 44. - In general, a mesh size M1 of the
first filter 55 and a mesh size M2 of thesecond filter 45 preferably satisfy the following inequality. The mesh size is determined by the number of mesh openings in a square inch. - M1≦M2
- In the present preferred embodiment, the mesh size M1 and M2 of the first and
second filters - M1<M2
- Namely, the mesh size M1 of the
first filter 55 is smaller than the mesh size M2 of thesecond filter 45. More precisely, the mesh size of thefirst filter portion 55 a in thefirst filter 55 ranges from 25 to 40 while the mesh size of thesecond filter portion 45 a in thesecond filter 45 is approximately 100. - In general, a receiving area A1 of the
filter portion 55 a and a receiving area A2 of thefilter portion 45 a preferably satisfy the following inequality. The receiving area of the filter in the present specification means the area of the filter portion that receives the compressed air. - A1≦A2
- In the preferred embodiment, the receiving areas A1 and A2 of the first and
second filters - A1<A2
- Namely, the receiving area A1 of the
first filter 55 on the upstream side is smaller than the receiving area A2 of thesecond filter 45 on the downstream side. - According to the
above scroll compressor 10 as shown in FIG. 4, while thecompressor 10 is operated, the compressed air is discharged from thedischarge port 20 d and is sent to thefilter chamber 44 through thecommunication hole 41 c. The compressed air passes through the first andsecond filters second filters chamber 32. Then, the filtered compressed air at a lower temperature is outputted from the outlet 45 d to the external circuit of thecompressor 10. - According to the
scroll compressor 10 of the second preferred embodiment as constructed above, substantially the same advantageous effects are obtained as described in the first preferred embodiment. - Furthermore, the foreign substances such as the abrasion powder mixed in the compressed air are collected by the first and
second filters filer chamber 44 passes through the twofilters escape passage 56 is formed so that the compressed air bypasses thefirst filter 55. Theescape passage 56 includes the space between thefirst filter 55 and theinner casing 41 a as indicated by “X” in FIG. 5. If thefirst filter 55 is clogged, the compressed air bypasses thefirst filter 55 through theescape passage 56. Consequently, the pressure loss due to the clogged filter is prevented or reduced. Even though thefirst filter 55 is clogged, thecompressor 10 effectively performs. In this regard, life of thescroll compressor 10 is extended. As described above, not only the foreign substances such as the abrasion powder mixed in the compressed air are substantially collected but also the temperature is substantially lower in the compressed air that is discharged from theoutlet 41 d of thefilter chamber 44. - Also, the
escape passage 56 are formed so as to bypass thefirst filter 55 that is located on the upstream side. Thus, even though the compressed air bypasses thefirst filter 55, the foreign substances in the compressed air are eventually collected by thesecond filter 45 on the downstream side. Consequently, the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected. Also, if thesecond filter 45 is clogged, the first andsecond filters second filter 45 is one indication of remaining life of thecompressor 10. - The first and
second filters discharge port 20 d. Thus, the compressed air discharged from thedischarge port 20 d effectively passes through the twofilters filters compressor 10. - The mesh size M1 of the
first filter 55 is smaller than the mesh size M2 of thesecond filter 45. Thus, the foreign substances such as the abrasion powder mixed in the compressed air are collected separately according to the size through thefirst filter 55 on the upstream side and then thesecond filter 45 on the downstream side. - The receiving area A1 of the
first filter 55 on the upstream side is smaller than the receiving area A2 of thesecond filter 45 on the downstream side. Thus, the compressed air smoothly flows toward thesecond filter 45 on the downstream side after passing through thefirst filter 55 on the upstream side so that the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected. - The
second filter 45 is located on the downstream side with respect tofirst filter 55, and an escape passage is not formed at thesecond filter 45. Thus, since the compressed air cannot bypass thesecond filter 45, the foreign substances in the compressed air are eventually collected by thesecond filter 45. It is possible to avoid the flow of the foreign substances to the external circuit of thecompressor 10 due to the insufficient cleaning which is expected when the compressed air supposedly bypasses thesecond filter 45. - The present invention is not limited to the above-described preferred embodiments, and the above-described preferred embodiments are also modified according to the present invention in the following manners.
- The shapes of the first and
second filters second filters second filters second filters - As shown in FIG. 8, the
filter filter portion frame filter portion coolant inlet 32 a or thecoolant outlet 32 b of the coolingchamber 32 as shown in FIG. 2, which are formed in theframe filter portion coolant inlet 32 a and thecoolant outlet 32 b of the coolingchamber 32, and the location for thecommunication hole 41 c and theoutlet 41 d of thefilter chamber 44 in thefilter casing 41. - The first and
second filters second filters first filter 55 is connected to theinner casing 41 a of thefilter casing 41 in the above-described second preferred embodiment. However, as shown in FIG. 10, thefirst filter 55 is connected to theframe 45 b of thesecond filter 45 in a fifth alternative embodiment. In this case, the end portion of each mountingportion 55 d of theframe 55 b of thefirst filter 55 is similarly fixed to theframe 45 b of thesecond filter 45 by a bolt that is not shown in the drawings as the above description. Thereby, thefilter portion 55 a of thefirst filter 55 is suspended in thefilter chamber 44, and a part of theescape passage 56 is formed between theframe 55 b of thefirst filter 55 and theinner casing 41 a. - As shown in FIG. 11, the
frame 45 b of thesecond filter 45 and theframe 55 b of thefirst filter 55 are sandwiched between the inner andouter casings frame 45 b of thesecond filter 45 and theframe 55 b of thefirst filter 55 are supported. A ring-shapedspacer 50 is interposed between thefirst filter frame 55 b and thesecond filter frame 45 b. Therefore, an interval is maintained between the first andsecond filters escape passage 56 includes through holes that are formed in thefirst filter frame 55 b. Meanwhile, thespacer 50 is formed integrally with either of thefirst filter frame 55 b or thesecond filter frame 45 b, and the number of components is reduced. - As shown in FIG. 12, an
escape passage 56 at thefirst filter 55 is formed so as to be opened and closed by an open-close means in a seventh alternative embodiment. The open-close means closes theescape passage 56 when the compressed air pressure on the upstream side relative to thefirst filter 55 is smaller than a predetermined pressure. The open-close means opens theescape passage 56 when the compressed air pressure on the upstream side relative to thefirst filter 55 is equal to or larger than the predetermined pressure. Namely, a support member 58 is arranged at theinner casing 41 a. The support member 58 includes a fixed support portion 58 a that has a ring shape and a plurality ofmovable support portions 58 b that extends from the fixed support portion 58 a. The fixed support portion 58 a is fixed to theinner casing 41 a. The end portions of themovable support portions 58 b movably support thefirst filter frame 55 b in an axial direction as shown in a horizontal direction in FIG. 12. Themovable support portions 58 b are arranged in a circumferential direction of the support member 58. Therefore, a part of theescape passage 56 is formed between themovable support portions 58 b. Thefirst filter frame 55 b contacts the fixed support portion 58 a to close theescape passage 56 as shown by a solid line in FIG. 12. Thefirst filter frame 55 b separates itself from the fixed support portion 58 a to open theescape passage 56 as shown by a double-dotted line in FIG. 12. Furthermore, anelastic member 59 such as a coil spring is interposed between thefirst filter frame 55 b and themovable support portions 58 b for urging thefirst filter 55 in a direction in which theescape passage 56 are closed or rightward in FIG. 12. That is, the direction is to urge thefirst filter 55 to close theescape passage 56. Thefirst filter 55, the support member 58 and theelastic member 59 constitute an open-close means of the present invention. - As constructed above, the
first filter 55 is urged by theelastic member 59 to close theescape passage 56 when thefirst filter 55 is at a position as shown by the solid line in FIG. 12. Thereby, the compressed air discharged from thedischarge port 20 d through thecommunication hole 41 c passes through thefirst filter 55. Consequently, the foreign substances such as the abrasion powder mixed in the compressed air are effectively collected by thefirst filter 55. - Also, when the
first filter 55 is clogged and the compressed air pressure on the upstream side relative to thefirst filter 55 is equal to or more than the predetermined pressure, thefirst filter 55 is forced to move against the urging of theelastic member 59 to open theescape passage 56 at a position as shown by the double-dotted line in FIG. 12. Thereby, the compressed air bypasses thefirst filter 55 through the openedescape passage 56. Consequently, the pressure loss due to the clogging of thefirst filter 55 is substantially prevented or reduced. As described above, even though thefirst filter 55 is clogged, thecompressor 10 effectively performs without cleaning or replacing the cloggedfilter 55. Thus, the life of thescroll compressor 10 is extended beyond the point when thefirst filter 55 is clogged. - Since the
first filter 55, the support member 58 and theelastic member 59 constitute the open-close means according to the present invention as described above, thefirst filter 55 effectively functions as a valve body. Meanwhile, instead of the above open-close means, another alternative embodiment utilizes a known escape valve at an escape passage in thefilter casing 41 for bypassing thefirst filter 55. - Also, in an eighth alternative embodiment, in the
second filter 45, an escape passage is similarly formed so as to be opened and closed by an open-close means as in the abovefirst filter 55. The open-close means usually closes the escape passage while the open-close means opens the escape passage when the pressure of the compressed air on the upstream side relative to thesecond filter 45 is equal to or larger than a predetermined pressure. - The
recess 32 c is formed in the fixedbase plate 20 a of the fixedscroll member 20 for defining the coolingchamber 32 in the above-described preferred embodiments. However, in a ninth alternative embodiment, therecess 32 c is formed in theinner casing 41 a of thefilter casing 41, or in both the fixedbase plate 20 a and theinner casing 41 a. - Also, in a tenth alternative embodiment, an additional cooling chamber is defined on the front side of the
filter casing 41 for cooling the discharged air in thefilter chamber 44 from both the front side and the rear side of thefilter chamber 44. - The flow-dividing
fins 33 are formed in the coolingchamber 32. However, in an eleventh alternative embodiment, the flow-dividingfins 33 are formed on the rear side of theinner casing 41 a of thefilter casing 41, or are omitted. - The above-described preferred embodiments apply to the compressor for compressing the gas, more particularly the air, which is supplied to the fuel cell FC of the electric vehicle. However, in a twelfth alternative embodiment, the present invention is applied to a compressor in an air conditioner or a refrigerating device.
- The two
filters second filters discharge port 20 d and do not face thedischarge port 20 d. - In the above-mentioned preferred embodiments, the present invention is applied to a scroll type compressor. However, the present invention is also applied to other type compressors.
- The present examples and embodiments are to be considered as illustrative and not restrictive, and the invention is not to be limited to the details given herein but may be modified within the scope of the appended claims.
Claims (35)
1. A scroll type compressor including a fixed scroll member and a movable scroll member to define compression chambers, the movable scroll member orbiting relative to the fixed scroll member to compress gas in the compression chambers, the compressed gas being discharged to a discharge port, comprising:
a filter chamber communicating with the discharge port for accommodating a first filter to at least partially filter the compressed gas; and
a cooling chamber located adjacent to the filter chamber for containing coolant fluid that cools the compressed gas in the filter chamber.
2. The scroll type compressor according to claim 1 , wherein the cooling chamber is located between the compression chambers and the filter chamber.
3. The scroll type compressor according to claim 1 , further comprising an inner casing and an outer casing that define the filter chamber, the inner casing being fixed to the fixed scroll member, the outer casing being detachably fixed to the inner casing.
4. The scroll type compressor according to claim 3 , wherein the first filter is supported in such a manner that the first filter is sandwiched by the inner and outer casings.
5. The scroll type compressor according to claim 1 , wherein the first filter is located so as to be perpendicular to a first flow direction in which the compressed gas flows in the filter chamber, the first flow direction being substantially the same as a second flow direction in which the compressed gas flows in the discharge port.
6. The scroll type compressor according to claim 1 , wherein the filter chamber further accommodates a second filter, the first and second filters being located along a first flow direction in which the compressed gas flows in the filter chamber, an escape passage being formed in such a manner that the compressed gas bypasses at least one of the first and second filters.
7. The scroll type compressor according to claim 6 , wherein the compressed gas flows in the discharge port in a second flow direction that is substantially the same as the first flow direction.
8. The scroll type compressor according to claim 7 , wherein the first and second filters are located so as to be perpendicular to the first flow direction.
9. The scroll type compressor according to claim 6 , wherein the first filter is located on an upstream side with respect to the second filter, each of the first and second filters having a mesh, a mesh size of the second filter being equal to or larger than that of the first filter.
10. The scroll type compressor according to claim 6 , wherein the first filter is located on an upstream side with respect to the second filter, the first filter having a first predetermined receiving area, the second filter having a second predetermined receiving area that is equal to or larger than the first predetermined receiving area.
11. The scroll type compressor according to claim 6 , further comprising an open-close means for closing the escape passage when a pressure of the compressed gas on an upstream side of the escape passage is lower than a predetermined pressure, the open-close means opening the escape passage when the pressure of the compressed gas on the upstream side of the escape passage is equal to or larger than the predetermined pressure.
12. The scroll type compressor according to claim 11 , wherein the open-close means further comprises a fixed support portion that is fixed to the inner casing and a movable support portion for movably supporting the first filter, the first filter contacting the fixed support portion so as to close the escape passage, the first filter moving away from the fixed support portion so as to open the escape passage.
13. The scroll type compressor according to claim 12 , wherein the open-close means further comprises an elastic member for urging the first filter to close the escape passage.
14. The scroll type compressor according to claim 6 , wherein the second filter is located on a downstream side with respect to the first filter, the escape passage being formed in such a manner that the compressed gas bypasses the first filter.
15. The scroll type compressor according to claim 6 , wherein the second filter is located on a downstream side with respect to the first filter, the compressed gas passing through the second filter without bypassing the second filter.
16. The scroll type compressor according to claim 6 , wherein the first and second filters are supported in such a manner that the first and second filters are sandwiched between the inner and outer casings.
17. The scroll type compressor according to claim 6 , further comprising a first filter mounting portion for placing the first filter adjacent to the second filter at a predetermined distance from the second filter.
18. The scroll type compressor according to claim 17 , wherein the first filter mounting portion is connected to the inner casing.
19. The scroll type compressor according to claim 17 , wherein the second filter has a frame, the first filter mounting portion being connected to the frame of the second filter.
20. The scroll type compressor according to claim 1 , wherein the first filter further comprises a filter portion and a frame.
21. The scroll type compressor according to claim 20 , wherein a shape of the filter portion is different from that of the frame.
22. The scroll type compressor according to claim 20 , wherein the first filter has a circular shape.
23. The scroll type compressor according to claim 20 , wherein the first filter has a rectangular shape.
24. The scroll type compressor according to claim 20 , wherein the first filter has a semicircular shape.
25. The scroll type compressor according to claim 20 , wherein the first filter has a planar shape.
26. The scroll type compressor according to claim 20 , wherein the first filter has a hemispherical shape.
27. The scroll type compressor according to claim 1 , wherein flow-dividing fins are provided in the cooling chamber for dividing flow of the coolant fluid.
28. The scroll type compressor according to claim 1 , further comprising a suction port for introducing the compressed gas into the compression chambers.
29. The scroll type compressor according to claim 1 , wherein an inlet is formed at the filter chamber for communicating with the discharge port, an outlet being formed at the filter chamber for leading the compressed gas to an external circuit.
30. A method of processing compressed gas in a compressor that forms a compression chambers for compressing the gas, a filter chamber having a filter and a cooling chamber that is located adjacent to the filter chamber for containing coolant fluid, the method comprising the steps of:
transmitting cooling temperature of the coolant fluid to the filter chamber;
cooling the compressed gas in the filter chamber; and
removing foreign substances in the compressed gas through the filter in the filter chamber simultaneously with said cooling.
31. The method according to claim 30 , further comprising the steps of:
transmitting the cooling temperature of the coolant fluid to the compression chambers; and
cooling the compressed gas in the compression chambers simultaneously with said cooling the compressed gas in the filter chamber.
32. The method according to claim 30 , wherein the compressor is a scroll type compressor.
33. A compressor for compressing gas, comprising:
a filter chamber for accommodating a filter so as to at least partially filter the compressed gas; and
a cooling chamber located adjacent to the filter chamber for containing coolant fluid so that cooling temperature of the coolant fluid is transmitted to the filter chamber.
34. The compressor according to claim 33 , further comprising compression chambers located adjacent to the cooling chamber for compressing the gas so that the cooling temperature of the coolant fluid is transmitted to the compression chambers.
35. A cooling circuit for cooling gas in a compressor that compresses the gas, comprising:
a filter chamber located in the compressor and accommodating a filter to filter at least partially the compressed gas;
a cooling chamber located in the compressor adjacent to the filter chamber for passing coolant fluid;
a heat exchanger connected to the cooling chamber for cooling the coolant fluid from the cooling chamber; and
a pump connected to the heat exchanger for supplying the coolant fluid to the cooling chamber.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2003-028401 | 2003-02-05 | ||
JP2003028401 | 2003-02-05 | ||
JP2003063608A JP2004293295A (en) | 2003-02-05 | 2003-03-10 | Scroll type compressor and cooling method and purification method of gas in the same |
JP2003-063608 | 2003-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040184940A1 true US20040184940A1 (en) | 2004-09-23 |
Family
ID=32658628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/770,757 Abandoned US20040184940A1 (en) | 2003-02-05 | 2004-02-03 | Compressor for and method of simultaneously cooling and cleaning gas |
Country Status (3)
Country | Link |
---|---|
US (1) | US20040184940A1 (en) |
EP (1) | EP1445491A1 (en) |
JP (1) | JP2004293295A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103807169A (en) * | 2014-02-17 | 2014-05-21 | 四川省宜宾普什模具有限公司 | Main machine of scroll compressor |
US20150300355A1 (en) * | 2012-10-29 | 2015-10-22 | Pierburg Pump Technology Gmbh | Automotive electric liquid pump |
US20150308458A1 (en) * | 2012-12-17 | 2015-10-29 | Daikin Industries, Ltd. | Screw compressor |
CN110905807A (en) * | 2019-11-30 | 2020-03-24 | 湖南海博瑞德电智控制技术有限公司 | Hydrogen circulation compression pump |
US10865793B2 (en) | 2016-12-06 | 2020-12-15 | Air Squared, Inc. | Scroll type device having liquid cooling through idler shafts |
US11047389B2 (en) | 2010-04-16 | 2021-06-29 | Air Squared, Inc. | Multi-stage scroll vacuum pumps and related scroll devices |
US11067080B2 (en) | 2018-07-17 | 2021-07-20 | Air Squared, Inc. | Low cost scroll compressor or vacuum pump |
US11454241B2 (en) | 2018-05-04 | 2022-09-27 | Air Squared, Inc. | Liquid cooling of fixed and orbiting scroll compressor, expander or vacuum pump |
US11473572B2 (en) | 2019-06-25 | 2022-10-18 | Air Squared, Inc. | Aftercooler for cooling compressed working fluid |
US11530703B2 (en) | 2018-07-18 | 2022-12-20 | Air Squared, Inc. | Orbiting scroll device lubrication |
US11885328B2 (en) | 2021-07-19 | 2024-01-30 | Air Squared, Inc. | Scroll device with an integrated cooling loop |
US11898557B2 (en) | 2020-11-30 | 2024-02-13 | Air Squared, Inc. | Liquid cooling of a scroll type compressor with liquid supply through the crankshaft |
US11933299B2 (en) | 2018-07-17 | 2024-03-19 | Air Squared, Inc. | Dual drive co-rotating spinning scroll compressor or expander |
Families Citing this family (2)
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JP4722870B2 (en) * | 2007-02-28 | 2011-07-13 | 愛三工業株式会社 | Dust filter for evaporative fuel processing equipment |
CN109268270B (en) * | 2018-11-19 | 2020-03-17 | 西安交通大学 | Vortex disc dynamic and static joint and water-cooling oil-free vortex compressor |
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US20020102173A1 (en) * | 2001-01-26 | 2002-08-01 | Masahiko Okada | Scroll type compressor |
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KR950008694B1 (en) * | 1987-12-28 | 1995-08-04 | 마쯔시다덴기산교 가부시기가이샤 | Scroll type compressor |
JP3966088B2 (en) * | 2002-06-11 | 2007-08-29 | 株式会社豊田自動織機 | Scroll compressor |
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- 2003-03-10 JP JP2003063608A patent/JP2004293295A/en active Pending
-
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- 2004-02-03 US US10/770,757 patent/US20040184940A1/en not_active Abandoned
- 2004-02-04 EP EP04002443A patent/EP1445491A1/en not_active Withdrawn
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US4174196A (en) * | 1976-07-28 | 1979-11-13 | Hitachi, Ltd. | Screw fluid machine |
US5775888A (en) * | 1995-09-01 | 1998-07-07 | Tokico Ltd. | Scroll fluid machine having end plate with greater center thickness |
US20020102173A1 (en) * | 2001-01-26 | 2002-08-01 | Masahiko Okada | Scroll type compressor |
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US11047389B2 (en) | 2010-04-16 | 2021-06-29 | Air Squared, Inc. | Multi-stage scroll vacuum pumps and related scroll devices |
US20150300355A1 (en) * | 2012-10-29 | 2015-10-22 | Pierburg Pump Technology Gmbh | Automotive electric liquid pump |
US10590935B2 (en) * | 2012-10-29 | 2020-03-17 | Pierburg Pump Technology Gmbh | Automotive electric liquid pump |
US20150308458A1 (en) * | 2012-12-17 | 2015-10-29 | Daikin Industries, Ltd. | Screw compressor |
US9771952B2 (en) * | 2012-12-17 | 2017-09-26 | Daikin Industries, Ltd. | Screw compressor |
CN103807169A (en) * | 2014-02-17 | 2014-05-21 | 四川省宜宾普什模具有限公司 | Main machine of scroll compressor |
US11692550B2 (en) | 2016-12-06 | 2023-07-04 | Air Squared, Inc. | Scroll type device having liquid cooling through idler shafts |
US10865793B2 (en) | 2016-12-06 | 2020-12-15 | Air Squared, Inc. | Scroll type device having liquid cooling through idler shafts |
US11454241B2 (en) | 2018-05-04 | 2022-09-27 | Air Squared, Inc. | Liquid cooling of fixed and orbiting scroll compressor, expander or vacuum pump |
US11067080B2 (en) | 2018-07-17 | 2021-07-20 | Air Squared, Inc. | Low cost scroll compressor or vacuum pump |
US11933299B2 (en) | 2018-07-17 | 2024-03-19 | Air Squared, Inc. | Dual drive co-rotating spinning scroll compressor or expander |
US11530703B2 (en) | 2018-07-18 | 2022-12-20 | Air Squared, Inc. | Orbiting scroll device lubrication |
US11473572B2 (en) | 2019-06-25 | 2022-10-18 | Air Squared, Inc. | Aftercooler for cooling compressed working fluid |
CN110905807A (en) * | 2019-11-30 | 2020-03-24 | 湖南海博瑞德电智控制技术有限公司 | Hydrogen circulation compression pump |
US11898557B2 (en) | 2020-11-30 | 2024-02-13 | Air Squared, Inc. | Liquid cooling of a scroll type compressor with liquid supply through the crankshaft |
US11885328B2 (en) | 2021-07-19 | 2024-01-30 | Air Squared, Inc. | Scroll device with an integrated cooling loop |
Also Published As
Publication number | Publication date |
---|---|
JP2004293295A (en) | 2004-10-21 |
EP1445491A1 (en) | 2004-08-11 |
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