CN101377198B - Capacity control device for screw compressor - Google Patents
Capacity control device for screw compressor Download PDFInfo
- Publication number
- CN101377198B CN101377198B CN2008102106397A CN200810210639A CN101377198B CN 101377198 B CN101377198 B CN 101377198B CN 2008102106397 A CN2008102106397 A CN 2008102106397A CN 200810210639 A CN200810210639 A CN 200810210639A CN 101377198 B CN101377198 B CN 101377198B
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- mentioned
- capacity control
- piston rod
- cylinder
- end wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
- F04C28/125—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves with sliding valves controlled by the use of fluid other than the working fluid
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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
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/92—Surface treatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/10—Hardness
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a capacity control device for a screw compressor capable of restraining leakage of a pressure fluid in a cylinder caused in response to the inclined movement of a piston rod. The capacity control device for the screw compressor has a capacity control valve (7), the piston rod (18) connected to the capacity control valve (7), a piston (17), and the cylinder (16) for slidably guiding the piston (17); wherein a guide body is provided on a cylinder end wall at the cylinder portion which is run through by the piston rod, the guide body is formed by a tube portion having holes running through the piston rod, and a flange facing an inner surface of the cylinder end wall abutting against an O-ring, and the O-ring that comes into sliding contact with the outer peripheral surface of the piston rod is provided on the inner surface of the holes of the tube portion hole on the guide body.
Description
Technical field
The present invention relates to a kind of capacity control device of screw compressor, say in more detail, relate to the capacity control device that carries out the screw compressor of volume controlled by capacity control drive.
Background technique
In screw compressor in the past, be provided with capacity control device with the capacity control drive that is used for compression volume being controlled corresponding to load.This capacity control device has the cylinder that is formed at the discharge housing, is located at the piston in this cylinder, reaches the piston rod (for example with reference to patent documentation 1) that breakthrough form is formed in the bar hole of the discharge housing that constitutes cylinder and is connected in capacity control drive.
[patent documentation 1] japanese kokai publication sho 62-58077 communique
In the capacity control device of above-mentioned screw compressor; For making capacity control drive (guiding valve), moves the load corresponding to screw compressor; Pressure fluid is supplied to a side side room or the opposing party side room of the piston in the cylinder; Through piston rod capacity control drive is carried out move operation, but in service at compressor acts on often from power of discharging side direction towards the suction side and the power that makes the rotating direction of guiding valve at capacity control drive.By this turning power guiding valve is tilted, be connected in the piston rod of guiding valve and contact with bar hole to this piston rod channeling conduct.
In the occasion that will increase the volume controlled scope, because the increase of the amount of movement of piston rod, so piston rod further increases at the exposure level in bar hole.
As a result, when the increase and decrease of in long-play, loading repeatedly, bar hole portion can wear and tear, and the gap between bar hole and piston rod increases.For this reason, the pressure fluid that supplies in the cylinder from this gap leaks, and the pressure in the cylinder can not keep, and existence can not remain on capacity control drive the problem of appropriate location.
In addition, the occasion of the interior pressure in the cylinder that as above-mentioned, can not keep the operation capacity control valve must be changed the discharge housing that compressor or replacing have cylinder, derives to change parts and change the problem that increase man-hour.
Summary of the invention
The present invention makes according to above-mentioned situation, and its purpose is to provide a kind of can the inhibition to move and produce the capacity control device of the screw compressor that the pressure fluid in the cylinder leaks along with the inclination of piston rod.
In order to achieve the above object, the capacity control device of screw compressor of the 1st invention, have capacity control drive, be connected in above-mentioned capacity control drive piston rod, its piston and can be slidably to the cylinder of above-mentioned piston channeling conduct; Wherein, On the cylinder end wall of the part that connects by piston rod of above-mentioned cylinder, be provided with guide way; Above-mentioned guide way is by the tube portion with the hole that connects above-mentioned piston rod; Constitute with the flange faced across the inner face of O-ring seals and above-mentioned cylinder end wall, the inboard in the hole of the above-mentioned tube portion on above-mentioned guide way is provided with the O-ring seals with the outer circumferential face sliding contact of above-mentioned piston rod.
In addition; The 2nd invention is on the basis of the 1st invention; Also have such characteristic: above-mentioned guide way is provided with the tapped hole that is screwed into the cylinder end wall and receives fixing tube portion; This one has the hole to the piston rod channeling conduct, between the outer circumferential face to the inner face in the hole of piston rod channeling conduct and piston rod of this one, is provided with O-ring seals.
In addition, the 3rd invention is on the basis of the 1st invention, and also have such characteristic: above-mentioned guide way is provided with a portion and flange; This one has the hole to the piston rod channeling conduct, is embedded into the hole of cylinder end wall; This flange is located at a side of above-mentioned tube portion, is fixed on the inner face side of above-mentioned cylinder end wall; Between the outer circumferential face to the inner face in the hole of piston rod channeling conduct and piston rod of above-mentioned tube portion, be provided with O-ring seals.
In addition, the 4th invention is on the basis of the 1st invention, and also have such characteristic: above-mentioned guide way is provided with a portion; This one has the hole to the piston rod channeling conduct, is pressed into the hole of cylinder end wall; Between the outer circumferential face to the inner face in the hole of piston rod channeling conduct and piston rod of above-mentioned tube portion, be provided with O-ring seals.
The capacity control device of screw compressor of the 5th invention has capacity control drive, is connected in the piston rod of above-mentioned capacity control drive, its piston and can be slidably to the cylinder of above-mentioned piston channeling conduct; Wherein:, be provided with that the inclination of controlling above-mentioned piston rod is moved and to the guide way of its channeling conduct at the cylinder end wall of the part that connects by piston rod of above-mentioned cylinder.
In addition, the 6th invention also has such characteristic: the height of the above-mentioned cylinder end wall of the hardness ratio of the material of above-mentioned guide way on the basis of the 5th invention.
In addition, the 7th invention is on the basis of the 5th invention, and also have such characteristic: above-mentioned guide way has improved hardness through heat treatment than above-mentioned cylinder end wall.
In addition, the 8th invention is on the basis of the 6th or the 7th invention, and also have such characteristic: above-mentioned guide way is provided with the tapped hole that is screwed into the cylinder end wall and receives fixing tube portion, and this one has the hole to the piston rod channeling conduct.
In addition, the 9th invention is on the basis of the 6th or the 7th invention, and also have such characteristic: above-mentioned guide way is provided with a portion and flange; This one has the hole to the piston rod channeling conduct, is embedded into the hole of cylinder end wall; This flange is located at a side of above-mentioned tube portion, is fixed on the inner face side of above-mentioned cylinder end wall.
In addition, the 10th invention is on the basis of the 6th or the 7th invention, and also have such characteristic: above-mentioned guide way is provided with a portion; This one has the hole to the piston rod channeling conduct, is pressed into the hole of cylinder end wall.
According to the present invention; Can suppress along with the inclination of the piston rod that constitutes capacity control device is moved and the leakage of the in-cylinder pressure fluid that produces, so, can keep the pressure in the cylinder really; Can capacity control drive be kept in position; Can improve its control performance, simultaneously, also improve its reliability.
Description of drawings
Fig. 1 is the vertical profile front view of screw compressor of a form of implementation with capacity control device of screw compressor of the present invention.
Fig. 2 is the vertical profile front elevation that amplifies a form of implementation of the capacity control device that screw compressor of the present invention shown in Figure 1 is shown.
Fig. 3 is the vertical profile front view that amplifies the guide way of the form of implementation that the capacity control device that is used for screw compressor of the present invention shown in Figure 1 is shown.
Fig. 4 is the vertical profile front view that amplifies another form of implementation of the capacity control device that screw compressor of the present invention is shown.
Fig. 5 is the vertical profile front view that amplifies another form of implementation again of the capacity control device that screw compressor of the present invention is shown.
Embodiment
Below, according to the form of implementation of the capacity control device of description of drawings screw compressor of the present invention.Fig. 1 illustrates a form of implementation of the capacity control device of screw compressor of the present invention to Fig. 3; Fig. 1 is the vertical profile front view of screw compressor of a form of implementation with capacity control device of screw compressor of the present invention; Fig. 2 is the vertical profile front elevation that amplifies a form of implementation of the capacity control device that screw compressor of the present invention shown in Figure 1 is shown, and Fig. 3 is the vertical profile front view that amplifies the guide way of the form of implementation that the capacity control device that is used for screw compressor of the present invention shown in Figure 1 is shown.
When the position that Fig. 1 illustrates capacity control drive is in the operation of high-load region, when the position that Fig. 2 illustrates capacity control drive is in the operation of low-load region.
In Fig. 1, screw compressor roughly is made up of compressor section 1, motor part 2 and the discharge housing section 3 of being located at the opposing party's side (right side of Fig. 1) of compressor section 1 of being located at side's side (left side of Fig. 1) of compressor section 1.The gas that compresses flows to compressor section 1 from the suction port 4 of being located at motor part 2 through in the motor part 2, after being boosted, is discharged to outside the compressor through discharging housing section 3.
Compressor section 1 has main casing 5, be contained in gyrator 6 in the main casing 5, be disposed at the capacity control drive (guiding valve) 7 of gyrator 6 upsides, the oil storage portion 8 that is disposed at gyrator 6 downsides, and the roller bearing 9 of side's side of bearing and turning device 6; In addition, discharge the volume controlled operation unit (afterwards stating) that housing section 3 has roller bearing 11 and ball bearing 12 that the opposing party's side to gyrator 6 of discharging housing 10, being disposed at this discharges housing 10 supports, capacity control drive 7 driven about reaching on the accompanying drawing.
The main casing 5 of compressor section 1 forms inlet hole 13, tap hole 14, reaches exhaust port 15 etc.Inlet hole 13 and the suction passage of suction port 4 formation to gyrator 6.The discharge route that tap hole 14 forms from gyrator 6.
The volume controlled operation unit that kind as depicted in figs. 1 and 2 that about on the accompanying drawing capacity control drive 7 is driven; Has cylinder 16; Be located at the piston 17 in this cylinder 16 slidably; One end is fixed in piston 17, the other end is connected in the piston rod 18 of capacity control drive 7, and be located at indoor, the helical spring 19 that applies right-hand power to piston 17 on Fig. 2 of piston rod 18 sides of cylinder 16.Cylinder 16 is formed at the cylinder end wall 22 of discharging housing 10 by the opposing party's side in the end cap 21 of the side's side (right side of Fig. 1, Fig. 2) that is formed at the cylinder hole 20 of discharging housing 10, inaccessible this cylinder hole 20, inaccessible cylinder hole 20 (left side of Fig. 1, Fig. 2) and forms.
The part by piston rod 18 perforations at cylinder end wall 22 is provided with tapped hole 23.Be screwed into the guide way 24 of fixing piston rod 18 shown in Figure 3 at this tapped hole 23.Guide way 24 is provided with a 24B of portion, lip part 24C, reaches screw thread 24D; The 24B of this has the hole 24A to piston rod 18 channeling conducts; This lip part 24C is located at side's side of the 24B of this; This screw thread 24D is located at the periphery of the 24B of portion, is screwed into the tapped hole 23 of cylinder end wall 22.In addition; Outer circumferential face at lip part 24C is provided with the engaging groove 24E that is screwed into instrument; In addition; Guide way 24 is provided with the O-ring seals groove 24F that accommodates at the O-ring seals 25 of the outer circumferential face sliding contact of piston rod 18 at the inner face to the hole 24A of piston rod 18 channeling conducts, and in addition, the end face of facing at the inner face with cylinder end wall 22 of lip part 24C is provided with the O-ring seals groove 24G that accommodates the O-ring seals 26 that contacts with the inner face of cylinder end wall 22.
Turn back to Fig. 1,, be provided with the fluid supply passage 27 that links to each other with the piston rod side room of cylinder 16 at main casing 5 and discharge housing 10.This fluid supply passage 27 makes the fluid from the high pressure of oil storage portion 8 debouch cylinder chamber 16.In the way of fluid supply passage 27, be provided with solenoid valve 28.This solenoid valve 28 is controlled to the mobile of cylinder 16 oil through its switching, makes piston 17 move left and right on Fig. 1.Like this, volume controlled is carried out in the position of control capacity control drive 7.
Below, the form of implementation of capacity control device of the screw compressor of the invention described above is described to Fig. 3 according to Fig. 1.
Constitute capacity control mechanism by above-mentioned capacity control drive 7 and volume controlled operation unit, but its volume controlled is supplied to the flowing of high-pressure liquid of cylinder 16 through fluid supply passage 27 from oil storage portion 8 by solenoid valve 28 controls, piston 17 left and right directions on Fig. 1 is moved.Like this, capacity control drive 7 can by with the corresponding suitable load operation of running state receive positioning control, carry out volume controlled.
In low-load region; The indoor hydrodynamic pressure of end cap 21 sides (right side of Fig. 1) of cylinder 16 is low pressure often; So; Improve the indoor hydrodynamic pressure of helical spring 19 sides (piston rod 18 sides) of cylinder 16, make piston 17, thereby capacity control drive 7 is moved towards end cap 21 sides (right side of Fig. 1) towards end cap 21 side shiftings.In addition; At high-load region; Reduce the hydrodynamic pressure of helical spring 19 sides (piston rod 18 sides) in the cylinder 16; By the low-pressure of the motor part that acts on capacity control drive 72 side wall 7a and the pressure difference of the high pressure of the side wall 7b that acts on piston rod 18 sides, capacity control drive 7 is moved towards motor part 2 sides (left side of Fig. 1).
In above-mentioned volume controlled, act on often from power of discharging side direction and the power that makes capacity control drive 7 rotating directions at capacity control drive 7 towards the suction side, capacity control drive 7 is being produced under the state that tilts the increase and decrease of loading repeatedly for a long time by above-mentioned turning power.For this reason, the piston rod 18 that is connected in capacity control drive 7 produces same inclination, but piston rod 18 is allowed inclination by the inboard O-ring seals 25 of the hole 24A that is located at guide way 24.In addition, O-ring seals 25 can suppress to supply to the leakage of the indoor pressure fluid of the piston rod side of cylinder 16.
As a result, can reliably keep the pressure in the cylinder 16, can capacity control drive 7 be kept in position, can improve its control performance, simultaneously, its reliability also improves.In addition, in form of implementation of the present invention, in the occasion that O-ring seals 25 wears out, pull down guide way 24 from cylinder end wall 22, can easily carry out the replacing of O-ring seals 25, simultaneously, its replacing time is also shorter.
In addition, in the occasion that will increase the volume controlled scope, because the mobile quantitative change of piston rod is big; So piston rod further increases at the exposure level in bar hole, but also can tackle this problem; So the volume controlled scope of screw compressor also possibly enlarge, and can enlarge its use.
Fig. 4 is the vertical profile front view that amplifies another form of implementation of the capacity control device that screw compressor of the present invention is shown.In this Fig. 4, same with Fig. 2, when the position that capacity control drive is shown is in the operation of low-load region.In addition, with the part of Fig. 2 and symbol same-sign shown in Figure 3 be same section or considerable part, so, omit its detailed description.
In this form of implementation, guide way 24 is made up of with the flange 24C that is located at side's side of the 24B of this 24B of tube portion that has the hole 24A of piston rod 18 channeling conducts.This guide way 24 is fixed to the hole 32 that the 24B of this is inserted into cylinder end wall 22 inner side surface of cylinder end wall 22 by bolt 33 with this lip part 24C, thereby is located at the inner side surface of cylinder end wall 22 dismantledly.
Same with above-mentioned form of implementation; O-ring seals 25 at guide way 24 to the outer circumferential face sliding contact of the inner face setting of the hole 24A of piston rod 18 channeling conducts and piston rod 18; In addition, the O-ring seals 26 that the end face setting of facing at the inner face with cylinder end wall 22 of lip part 24D contacts with the inner face of cylinder end wall 22.
According to this form of implementation, can reliably keep the pressure in the cylinder 16, can capacity control drive 7 be kept in position, can improve its control performance, simultaneously, its reliability also improves.In addition, in the occasion that O-ring seals 25 wears out, pull down guide way 24 from cylinder end wall 22, can easily carry out the replacing of O-ring seals 25, simultaneously, its replacing time is also shorter.In addition, in the occasion that will increase the volume controlled scope, because the mobile quantitative change of piston rod is big; So piston rod further increases at the exposure level in bar hole, but also can tackle this problem; So the volume controlled scope of screw compressor also possibly enlarge, and can enlarge its use.
Fig. 5 is for the vertical profile front view of another form of implementation again of amplifying the capacity control device that screw compressor of the present invention is shown, and is same with Fig. 2 in this Fig. 5, when the position that capacity control drive is shown is in the operation of low-load region.In addition, with the part of Fig. 2 and symbol same-sign shown in Figure 3 be same section or considerable part, so, omit its detailed description.
In this form of implementation, guide way 24 is made up of with the lip part 24D that is located at side's side of the 24B of this 24B of tube portion that has the hole 24A of piston rod 18 channeling conducts.This guide way 24 is pressed into the hole 32 of cylinder end wall 22 with the 24B of this, is located at the inner side surface of cylinder end wall 22.
Same with above-mentioned form of implementation; O-ring seals 25 at guide way 24 to the outer circumferential face sliding contact of the inner face setting of the hole 24A of piston rod 18 channeling conducts and piston rod 18; In addition, the O-ring seals 26 that the end face setting of facing at the inner face with cylinder end wall 22 of lip part 24C contacts with the inner face of cylinder end wall 22.
According to this form of implementation, same with above-mentioned form of implementation, can reliably keep the pressure in the cylinder 16, can capacity control drive 7 be kept in position, can improve its control performance, simultaneously, its reliability also improves.In addition, in the occasion that O-ring seals 25 wears out, pull down guide way 24 from cylinder end wall 22, can easily carry out the replacing of O-ring seals 25, simultaneously, it is also shorter that it changes activity duration.In addition, need not be used for guide way 24 is fixed in the parts such as bolt of cylinder end wall 22, can reduce the parts expense.
In above-mentioned form of implementation, sliding contact is arranged on the inner face to the hole 24A of piston rod 18 channeling conducts of guide way 24 in the O-ring seals 25 of the outer circumferential face of piston rod 18, constitute but also can omit this O-ring seals 25 ground.That is,
The high material of hardness by than the material of discharging housing 10 forms guide way 24; Perhaps also can form the hardness of guide way 24 than the higher hardness of material of discharging housing 10 through heat treatment; By the means same, the guide way 24 that forms like this is fixed on the cylinder end wall 22 with above-mentioned form of implementation.
In this occasion, as make the hole 32 of cylinder end wall 22 and chimeric the becoming of piston rod 18 closely set chimeric size, the leakage that then can make pressure fluid is an inferior limit, can keep the pressure in the cylinder 16.
According to this form of implementation, can improve reliability by the wear resistance of simpler structure raising screw compressor, in addition, can be controlled at inferior limit to replacing parts, replacing man-hour, recovery capacity is controlled function rapidly.
Claims (4)
1. the capacity control device of a screw compressor, have capacity control drive, be connected in above-mentioned capacity control drive piston rod, its piston and can be slidably to the cylinder of above-mentioned piston channeling conduct; It is characterized in that:
On the cylinder end wall of the part that is connected by piston rod of above-mentioned cylinder, be provided with guide way, above-mentioned guide way is by tube portion with the hole that connects above-mentioned piston rod and the flange formation faced across the inner face of O-ring seals and above-mentioned cylinder end wall,
The inboard in the hole of the above-mentioned tube portion on above-mentioned guide way is provided with the O-ring seals with the outer circumferential face sliding contact of above-mentioned piston rod.
2. the capacity control device of screw compressor according to claim 1 is characterized in that: the above-mentioned tube portion of above-mentioned guide way is screwed in the tapped hole of above-mentioned cylinder end wall and is fixed.
3. the capacity control device of screw compressor according to claim 1 is characterized in that: the above-mentioned tube portion of above-mentioned guide way is embedded in the hole of above-mentioned cylinder end wall, and the above-mentioned flange of above-mentioned guide way is through being bolted to the inner face of above-mentioned cylinder end wall.
4. the capacity control device of screw compressor according to claim 1 is characterized in that: the above-mentioned tube portion of above-mentioned guide way is pressed in the hole of above-mentioned cylinder end wall.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-223471 | 2007-08-30 | ||
| JP2007223471A JP4401408B2 (en) | 2007-08-30 | 2007-08-30 | Screw compressor capacity control device |
| JP2007223471 | 2007-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101377198A CN101377198A (en) | 2009-03-04 |
| CN101377198B true CN101377198B (en) | 2012-05-09 |
Family
ID=40011351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102106397A Active CN101377198B (en) | 2007-08-30 | 2008-08-13 | Capacity control device for screw compressor |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2031249B1 (en) |
| JP (1) | JP4401408B2 (en) |
| CN (1) | CN101377198B (en) |
| TR (1) | TR201807695T4 (en) |
| TW (1) | TW200925424A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5389755B2 (en) * | 2010-08-30 | 2014-01-15 | 日立アプライアンス株式会社 | Screw compressor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0488043A1 (en) * | 1990-11-30 | 1992-06-03 | Carrier Corporation | Capacity volume ratio control for twin screw compressors |
| CN1211686A (en) * | 1997-09-10 | 1999-03-24 | 株式会社神户制钢所 | Helical lobe compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1422821A (en) * | 1973-06-20 | 1976-01-28 | Howden Compressors Ltd | Meshing-screw compressors |
| JPS6258077A (en) | 1985-09-06 | 1987-03-13 | Hitachi Ltd | Screw compressor |
| US20060165543A1 (en) * | 2005-01-24 | 2006-07-27 | York International Corporation | Screw compressor acoustic resonance reduction |
| US20100209280A1 (en) * | 2007-10-01 | 2010-08-19 | Carrier Corporation | Screw compressor pulsation damper |
-
2007
- 2007-08-30 JP JP2007223471A patent/JP4401408B2/en active Active
-
2008
- 2008-07-31 TW TW97129040A patent/TW200925424A/en unknown
- 2008-08-13 CN CN2008102106397A patent/CN101377198B/en active Active
- 2008-08-20 TR TR2018/07695T patent/TR201807695T4/en unknown
- 2008-08-20 EP EP08014771.3A patent/EP2031249B1/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0488043A1 (en) * | 1990-11-30 | 1992-06-03 | Carrier Corporation | Capacity volume ratio control for twin screw compressors |
| CN1211686A (en) * | 1997-09-10 | 1999-03-24 | 株式会社神户制钢所 | Helical lobe compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4401408B2 (en) | 2010-01-20 |
| JP2009057842A (en) | 2009-03-19 |
| EP2031249A3 (en) | 2014-03-12 |
| TW200925424A (en) | 2009-06-16 |
| CN101377198A (en) | 2009-03-04 |
| EP2031249B1 (en) | 2018-03-28 |
| TWI371530B (en) | 2012-09-01 |
| TR201807695T4 (en) | 2018-06-21 |
| EP2031249A2 (en) | 2009-03-04 |
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Effective date of registration: 20180710 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Johnson Controls Air Conditioning Co., Ltd. Address before: Hongkong, China Patentee before: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. |