CN101372963A - Vacuum preventing device of swirl compressor - Google Patents
Vacuum preventing device of swirl compressor Download PDFInfo
- Publication number
- CN101372963A CN101372963A CNA2007101876253A CN200710187625A CN101372963A CN 101372963 A CN101372963 A CN 101372963A CN A2007101876253 A CNA2007101876253 A CN A2007101876253A CN 200710187625 A CN200710187625 A CN 200710187625A CN 101372963 A CN101372963 A CN 101372963A
- Authority
- CN
- China
- Prior art keywords
- valve
- space
- casing
- scroll
- output region
- 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.)
- Pending
Links
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a vacuum prevention device of a scroll compressor, which comprises a casing, a fixed scroll plate, a valve block and a valve, wherein the casing divides into a sealed inner space into a suction space and an output space; the fixed scroll plate forms a compression chamber together with a rotary scroll plate; a valve block is fixedly arranged on the outer lateral surface of the fixed scroll plate, and the valve block is provided with a valve hole formed to communicate the compression chamber with the suction space and the output space in the casing; and the valve is inserted into the valve hole of the valve block, slides according to the pressure change of the compression chamber to be opened/closed between the suction space and the output space. A buffer space which ensures that a certain pressure is formed between the valve block and the valve formed on the valve block or the valve can be prevented form colliding with the valve block when the sliding valve makes reciprocating movement, and the pressure of the output space acts on the sliding valve, thereby increasing the response speed of the sliding valve, and improving the performance of the compressor.
Description
Technical field
The present invention relates to a kind of vacuum preventer of scroll compressor, especially in operation process, when pressing chamber became vacuum state, the part refrigerant that outputs to the hyperbaric chamber flowed in the pressing chamber, prevents the vacuum preventer of the scroll compressor that pressing chamber turns round under vacuum state.
Background technique
Usually, in the scroll compressor, the rotation scroll that is rotated motion under the drive of bent axle has possessed the rotation vortex sheet of involute shape, fixed scroll sheet with the involute shape of fixed scroll forms the pressing chamber that moves continuously, the rotation scroll is carried out off-centre and is rotatablely moved under the drive of bent axle, reduce the volume of pressing chamber gradually, and compression is filled in the refrigerant of pressing chamber inside, when reaching certain compression ratio, discharge the refrigerant of compression by delivery outlet.
Scroll compressor has higher compression ratio relatively with respect to the compressor of other kinds, and smooth more the carrying out of the suction-compression-delivery stroke of refrigerant, can obtain stable moment, therefore is applied to the refrigerant compression in the aircondition more.And, scroll compressor is when starting and run well, need to distinguish the suction space of low pressure and the output region of high pressure, and sucking under the low-down condition of pressure, suction space and output region are interconnected, the refrigerant that outputs to the high pressure in the output region has prevented the high vacuumization of compressor by sucking the inside of space inflow pressing chamber.
As shown in Figure 1, the scroll compressor of prior art comprises: the casing 10 that the inner space is divided into the output region S2 of the suction space S 1 of low pressure and high pressure; Be fixed in the main frame 20 of casing 10 inside; Be fixedly installed on the main frame 20, with the fixed scroll 30 of the continuous pressing chamber P that moves of rotation scroll 40 formation; Be arranged on the fixed scroll 30, when the pressure of pressing chamber P is lower than authorized pressure, make the output region S2 of casing 10 and suck space S 1 to be communicated with, a part of refrigerant of output is guided to the vacuum preventer 50 of pressing chamber P.
Fixed scroll 30 is provided with circuitous channel portion in its hardboard portion 31, under the control of the sliding shutter 51 of vacuum preventer 50, open and close the suction space S 1 and the output region S2 of casing 10.Circuitous channel portion such as Fig. 2 and shown in Figure 3 comprise: transversely being recessed into of the hardboard portion 31 of fixed scroll 30 degree of depth of regulation and the valve opening 32 that forms; The suction pressure passageway 33 that valve opening 32 is communicated with the suction space S 1 of casing 10; The middle pressure passageway 34 that valve opening 32 is communicated with pressing chamber; The output pressure passageway 35 that valve opening 32 is communicated with the output region S2 of casing 10.
The symbol 36 expression fixed scroll sheets that do not have explanation among the figure; 37 expression suction ports; 38 expression delivery outlets; 41 expression rotation vortex sheets; 53 expression valve gaps; 54 expression fixing pins; 61 expression stators; 62 expression rotors; 63 expression bent axles; 64 vice frameworks.
As above the existing scroll compressor vacuum preventer of Gou Chenging is cut off the output pressure passageway 35 of fixed scroll 30 and is sucked pressure passageway 33 by vacuum preventer 50 when new refrigerant enters pressing chamber P continuously, carries out compression refrigerant normally.And when the amount of the refrigerant that flows into pressing chamber P inside seldom or no longer flows into, utilize vacuum preventer 50 to make output pressure passageway 35 and suck pressure passageway 33 and be communicated with, the a part of refrigerant that outputs to output region S2 is fed among the pressing chamber P by sucking space S 1, keeps pressure balance thus.
For example, as shown in Figure 2, when compressor stops and high vacuum turns round, the pressure of pressing chamber P drops to below the authorized pressure, pressing chamber P pressure is less than the elastic force of valve spring 52 and making a concerted effort of suction space S 1, sliding shutter 51 is pulled to the opposite of valve spring 52, exports pressure passageway 35 thus and is communicated with suction pressure passageway 33, reaches pressure balance.
On the contrary, as shown in Figure 3, when pressing chamber started and run well, the pressure of pressing chamber P maintained more than the pressure of regulation, the balance of making a concerted effort to reach of the pressure of the elastic force of the pressure of pressing chamber P and valve spring 52 and suction space S 1 makes sliding shutter 51 cut off output pressure passageway 35.
But, the vacuum preventer of the scroll compressor of prior art as above, when starting in the early stage, perhaps flow into pressing chamber inside at too much liquid refrigerants, perhaps in the running of the carrying out that ON/OFF acts frequently, sliding shutter causes bigger impact to valve gap, causes the damaged or wearing and tearing of the part of sliding shutter or valve gap, the powder that produces during wearing and tearing clips between piston and the valve opening, the moving of limited piston.
Summary of the invention
Technical problem to be solved by this invention is, a kind of vacuum preventer of scroll compressor is provided, and reduced the impact force between sliding shutter and the support zone, avoids taking place damaged or wearing and tearing.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of vacuum preventer of scroll compressor, and described scroll compressor comprises: the inner space of sealing is divided into the casing that sucks space and output region; Be fixedly installed on the casing, with rotating the fixed scroll that scroll forms pressing chamber; Described vacuum preventer comprises on the outer side surface that is fixedly installed on fixed scroll, has formed the valve piece that has valve opening that interior suction space of pressing chamber and casing and output region are communicated with; Be inserted in the valve opening of valve piece, slide, open and close the valve that sucks between space and the output region according to the variation in pressure of pressing chamber; Two ends are pressed on valve piece or the valve, the valve spring of elastic support valve; Forming the buffer space that makes the certain pressure of formation between valve piece and the valve on valve piece or the valve.
Recessed valve motion direction one side that is arranged on of described buffer space.
Described buffer space is recessed to be arranged on the valve piece that joins with valve motion direction one side.
A kind of vacuum preventer of scroll compressor, described scroll compressor comprises: the inner space of sealing is divided into the casing that sucks space and output region; Be fixedly installed on the casing, with rotating the fixed scroll that scroll forms pressing chamber; Described vacuum preventer comprises on the outer side surface that is fixedly installed on fixed scroll, has formed the valve piece that has valve opening that interior suction space of pressing chamber and casing and output region are communicated with; Be inserted in the valve opening of valve piece, slide, open and close the valve that sucks between space and the output region according to the variation in pressure of pressing chamber; On the valve piece, formed moving direction one side that pressure with output region puts on valve, the direction output identical with the moving direction of valve has been set presses through hole.
Described valve is provided with recessed buffer space on valve motion direction one side.
Press in output to have possessed on the inside end of through hole and gas channel that output presses through hole to be communicated with, formed the valve guide structure of sliding contact on the buffer space inner peripheral surface.
Described valve piece is fixedly installed on the output region side surface of fixed scroll, has formed the communication passage that connects the suction space of valve opening and casing by the guiding channel of valve piece on fixed scroll.
Comprising also that two ends are close to is arranged on valve piece and the valve, with respect to the valve spring of valve piece elastic support valve.
The invention has the beneficial effects as follows: the vacuum preventer of scroll compressor of the present invention, between valve piece or sliding shutter, formed buffer space, when sliding shutter moves back and forth, can prevent to conflict with the generation of valve piece.And the pressure of output region will act on the sliding shutter, and the sliding movement of elastic support sliding shutter has improved the reaction velocity of sliding shutter, can improve the performance of compressor.
Description of drawings
Fig. 1 is the sectional view that has been equipped with the scroll compressor example of existing vacuum preventer,
The sectional view of the operating condition when Fig. 2 is stopping of existing vacuum preventer and high vacuum running,
Fig. 3 is the sectional view of the startup of existing vacuum preventer and the operating condition when running well,
Fig. 4 is the sectional view that has been equipped with scroll compressor the 1st embodiment of vacuum preventer provided by the invention,
Fig. 5 is the sectional axonometric drawing of vacuum preventer provided by the invention.
The sectional view of the operating condition when Fig. 6 is stopping of vacuum preventer provided by the invention and high vacuum running,
Fig. 7 represents the startup of vacuum preventer provided by the invention and the sectional view of the operating condition when running well,
Fig. 8 represents the sectional view of the variation of vacuum preventer provided by the invention,
Fig. 9 represents the stopping and the sectional view of the operating condition in high vacuum when running of the 2nd embodiment of vacuum preventer provided by the invention,
Figure 10 is the 2nd embodiment's the startup of vacuum preventer provided by the invention and the sectional view of the working state when running well.
Among the figure:
110: casing 120: main frame
130: fixed scroll 131: hardboard portion
132: fixed scroll sheet 135: circuitous hole
136: middle pressure passageway 140: the rotation scroll
150: vacuum preventer 151: the valve piece
152: sliding shutter 152b: the buffer space groove
153: valve spring 155: block
155a: valve opening 155b: suck pressure passageway
155c: output pressure passageway 156: piece lid
156a: communication passage 156b: spring fixed projection
156c: buffer space groove 156d: through hole is pressed in output
157: valve guide structure S1, S2: suck output region
Embodiment
Below, be described with reference to the accompanying drawings scroll compressor vacuum preventer provided by the invention.
Shown in Fig. 4,5, scroll compressor provided by the invention comprises; Be divided into the casing 110 of the output region S2 of the suction space S 1 of low pressure and high pressure; Be fixedly installed on the main frame 120 of casing 110 inside; Be fixedly installed on main frame 120 above, formed and the fixed scroll 130 of the pressing chamber P that rotation scroll 140 moves continuously; Be arranged on the fixed scroll 130, when the pressure of pressing chamber P is reduced to below the authorized pressure or compressor when stopping, the output region S2 of high pressure and the suction space S 1 of low pressure are communicated with, and the part refrigerant that will export thus guides to the vacuum preventer 150 of pressing chamber P.
Fixed scroll 130 is as Fig. 4 and shown in Figure 5, formed the fixed scroll sheet 132 that the rotation vortex sheet 141 with rotation scroll 140 outstanding in hardboard portion 131 bottom surfaces forms the involute shape of pressing chamber P, on bottom surface, hardboard portion 131 outer periphery, form the suction port 133 that the suction space S 1 that makes casing 110 and pressing chamber P are communicated with, in hardboard portion 131, be formed centrally the delivery outlet 134 that the output region S2 that makes pressing chamber P and casing 110 is communicated with.
Be provided with on the outer periphery of fixed scroll 130 sliding shutter 152 by vacuum preventer 150 open and close the suction space S 1 of casings 110 and output region S2 inclination the circuitous hole 135 of predetermined angular, on the intermediate portion of hardboard portion 131, formed the middle pressure passageway 136 that intermediate compression chambers P is communicated with the valve opening 155a of valve piece 151.
Valve opening 155a runs through on axle direction and forms on the block 155, and its lower end is communicated with middle pressure passageway 136, and its upper end open.And, formed parallel on the side of valve opening 155a with valve opening 155a, the suction pressure passageway 155b that the other end is communicated with circuitous hole 135 has formed on the radial direction of valve opening 155a by sliding shutter 152 switching, optionally the output pressure passageway 155c that are communicated with casing 110 output region S2.
Valve opening 155a and valve spring 153 forms identical shape, and its internal diameter is slightly larger than the external diameter with valve spring 153, thus can pilot valve door spring 153 move.
Sliding shutter 152 employing plastics etc. have the lightweight material of lubricity, have formed the spring fixed projection 152a of the lower end that can be pressed into valve spring 153 on the upper end.And, formed the buffer space groove 152b of the degree of depth on the upper end of the spring fixed projection 152a of sliding shutter 152 with regulation, between piece lid 156, form buffer space thus.
Simultaneously, buffer space can be provided with recessed buffer space groove 156c as shown in Figure 8 on the piece lid 156 corresponding with the moving direction upper end of sliding shutter 152.
There is not the symbol 156b of explanation to represent the spring fixed projection among the figure, 161, expression stator, 162 expression rotors, 163 expression bent axles, 164 vice frameworks.
As above the scroll compressor vacuum preventer of Gou Chenging has following action effect:
Connect after the power supply on the stator 161, rotor 162 is subjected to the electromagnetic force of stator 161 and rotates, turning crankshaft 163 simultaneously, the rotation scroll 140 on the eccentric thus head end that is incorporated into bent axle 163 is rotated motion, and forms two pressing chamber P that move continuously between the fixed scroll 130.In this process, the refrigerant that the outside of casing 110 provides flows into the suction space S 1 of the low pressure of casing 110 by suction pipe 112, and the low pressure refrigerant that sucks space S 1 is passed through the suction port 133 inflow outermost pressing chamber P inside of fixed scroll 130, be rotated scroll 140 and be pushed into gradually in the most inboard pressing chamber P and be compressed, and then output to the output region S2 of casing 110 by the delivery outlet 133 of fixed scroll 130.
As shown in Figure 6, when compressor shuts down or refrigerant can't flow into pressing chamber when inner, the pressure of the intermediate compression chambers P of sliding shutter 152 lower ends reduces, and sliding shutter 152 descends, and opens output pressure passageway 155c.By the output pressure passageway 155c that is opened, the refrigerant that is encased in the high pressure in the output region S2 is introduced suction pressure passageway 155b by output pressure passageway 155c and communication passage 156a, and by sucking pressure passageway 55b and circuitous hole 135 adverse currents to sucking space S 1, and then flow in the pressing chamber P, make the pressure of whole casing 110 inner spaces reach balance, prevented the high vacuumization of pressing chamber P.
Simultaneously, as shown in Figure 7, when compressor primary starting or normal operation, when stopping, compressor drops to sliding shutter 152 above the fixed scroll sheet 131 under the pressure effect of intermediate compression chambers P, rise and cut-out output pressure passageway 155c, prevent to output to the refrigerant adverse current of output region S2 inside thus to sucking space S 1 inside.Particularly, during the primary starting of compressor, the pressure of output region S2 is low relatively, sliding shutter 152 can rise suddenly, produces strong conflicting with piece lid 156, but owing on sliding shutter 152 or piece lid 156, be provided with buffer space groove 152b among the present invention, 156c, prevent sliding shutter 152 impact blocks lid 156, prevented the damaged or wearing and tearing of sliding shutter 152, can improve the reliability of compressor.And when buffer space groove 152b was set on sliding shutter 152, the weight of sliding shutter 152 had reduced corresponding amount, and valve can react rapidly when starting, and has reduced the leakage of refrigerant.
Simultaneously, other embodiments of scroll compressor vacuum preventer provided by the invention are as follows.
In the foregoing embodiments, buffer space stops or high vacuum when running at compressor, be communicated with the output region of casing, and when running well, separate with the output region of casing, the buffer space groove also is communicated with the output region of casing in the startup of compressor or when running well but in the present embodiment.
As shown in Figure 9, for the output region S2 of the buffer space groove 152b that makes sliding shutter 152 and casing 110 is communicated with, on piece lid 156, form output and pressed through hole 156d, press the inside end of through hole 156d to form in the buffer space groove 152b of the insertion sliding shutter 152 that slides the columnar valve guide structure 157 that moves up and down of guided slidable valve 152 in output.
Output presses through hole 156d should be arranged on the direction identical with the moving direction of sliding shutter 152, and the pressure of output region S2 can directly have influence on sliding shutter 152 thus.
The length of valve guide structure 157 should be less than the degree of depth of buffer space groove 152b, makes after sliding shutter 152 rises fully, when its upper end contacts with piece lid 156, with the bottom surface maintenance certain spacing of buffer space groove 152b.
The structure of the vacuum preventer in the aforesaid present embodiment is identical with the 1st embodiment with action effect, therefore no longer explanation.
Just in the present embodiment, formed the output region S2 that connects casing 110 on the piece lid 156 and pressed through hole 156d with the output of buffering space groove 152b, the high pressure of output region S2 will have influence on the buffer space groove 152b of sliding shutter 152 thus, and the sliding movement of sliding shutter 152 can be carried out rapidly.Particularly, stop or high vacuum when running at compressor, sliding shutter 152 should descend rapidly, exports pressure passageway 155c thus and just can open rapidly, removes the high vacuum phenomenon.But if increase the elastic force of the spring that supports sliding shutter 152 for this reason, the opening speed of the sliding shutter 152 that then can slow down when starting has influence on the performance of compressor, so can not adopt.As shown in this embodiment, when output pressure through hole 156d is set on piece lid 156, compressor stop or high vacuum running in, the high pressure of output region S2 is delivered on the sliding shutter 152, when can open output pressure passageway 155c rapidly, in the startup of compressor and when running well, because the pressure of output region S2 is low, its resistance is also little, so sliding shutter 152 can be opened rapidly.
And, when around the output pressure through hole 156d valve guide structure 157 being set, the buffer space groove 152b inner peripheral surface sliding contact of valve guide structure 157 and sliding shutter 152, the slip of guided slidable valve 152, therefore the working state of sliding shutter 152 can further improve the reliability of compressor with highly stable.
Claims (8)
1. the vacuum preventer of a scroll compressor, described scroll compressor comprises: the inner space of sealing is divided into the casing that sucks space and output region; Be fixedly installed on the casing, with rotating the fixed scroll that scroll forms pressing chamber; It is characterized in that described vacuum preventer comprises on the outer side surface that is fixedly installed on fixed scroll, has formed the valve piece that has valve opening that interior suction space of pressing chamber and casing and output region are communicated with; Be inserted in the valve opening of valve piece, slide, open and close the valve that sucks between space and the output region according to the variation in pressure of pressing chamber; Two ends are pressed on valve piece or the valve, the valve spring of elastic support valve; Forming the buffer space that makes the certain pressure of formation between valve piece and the valve on valve piece or the valve.
2. the vacuum preventer of scroll compressor according to claim 1 is characterized in that, recessed valve motion direction one side that is arranged on of described buffer space.
3. the vacuum preventer of scroll compressor according to claim 1 is characterized in that, described buffer space is recessed to be arranged on the valve piece that joins with valve motion direction one side.
4. the vacuum preventer of a scroll compressor, described scroll compressor comprises: the inner space of sealing is divided into the casing that sucks space and output region; Be fixedly installed on the casing, with rotating the fixed scroll that scroll forms pressing chamber; It is characterized in that described vacuum preventer comprises on the outer side surface that is fixedly installed on fixed scroll, has formed the valve piece that has valve opening that interior suction space of pressing chamber and casing and output region are communicated with; Be inserted in the valve opening of valve piece, slide, open and close the valve that sucks between space and the output region according to the variation in pressure of pressing chamber; On the valve piece, formed moving direction one side that pressure with output region puts on valve, the direction output identical with the moving direction of valve has been set presses through hole.
5. the vacuum preventer of scroll compressor according to claim 4 is characterized in that, described valve is provided with recessed buffer space on valve motion direction one side.
6. the vacuum preventer of scroll compressor according to claim 5, it is characterized in that, press in output to have possessed on the inside end of through hole and gas channel that output presses through hole to be communicated with, formed the valve guide structure of sliding contact on the buffer space inner peripheral surface.
7. according to the vacuum preventer of claim 1 or 4 described scroll compressors, it is characterized in that, described valve piece is fixedly installed on the output region side surface of fixed scroll, has formed the communication passage that connects the suction space of valve opening and casing by the guiding channel of valve piece on fixed scroll.
8. according to the vacuum preventer of claim 1 or 4 described scroll compressors, it is characterized in that, comprise also that two ends are close to be arranged on valve piece and the valve, with respect to the valve spring of valve piece elastic support valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101876253A CN101372963A (en) | 2007-08-22 | 2007-11-20 | Vacuum preventing device of swirl compressor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710059216 | 2007-08-22 | ||
| CN200710059216.5 | 2007-08-22 | ||
| CNA2007101876253A CN101372963A (en) | 2007-08-22 | 2007-11-20 | Vacuum preventing device of swirl compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101372963A true CN101372963A (en) | 2009-02-25 |
Family
ID=40447285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101876253A Pending CN101372963A (en) | 2007-08-22 | 2007-11-20 | Vacuum preventing device of swirl compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101372963A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330677A (en) * | 2010-07-12 | 2012-01-25 | Lg电子株式会社 | Scroll compressor |
| CN109162919A (en) * | 2018-11-06 | 2019-01-08 | 苏州英华特涡旋技术有限公司 | A kind of anti-vacuum evacuation device of screw compressor |
-
2007
- 2007-11-20 CN CNA2007101876253A patent/CN101372963A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330677A (en) * | 2010-07-12 | 2012-01-25 | Lg电子株式会社 | Scroll compressor |
| CN102330677B (en) * | 2010-07-12 | 2015-07-01 | Lg电子株式会社 | Scroll compressor |
| US9145891B2 (en) | 2010-07-12 | 2015-09-29 | Lg Electronics Inc. | Scroll compressor |
| CN109162919A (en) * | 2018-11-06 | 2019-01-08 | 苏州英华特涡旋技术有限公司 | A kind of anti-vacuum evacuation device of screw compressor |
| CN109162919B (en) * | 2018-11-06 | 2023-09-26 | 苏州英华特涡旋技术股份有限公司 | Anti-vacuumizing device of scroll compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100434077B1 (en) | Apparatus preventing vacuum for scroll compressor | |
| KR101229812B1 (en) | Scroll machine | |
| CN103189650B (en) | Scroll compressor | |
| EP3657018B1 (en) | Scroll compressor | |
| CN107448383A (en) | Scroll compressor | |
| CN105370572A (en) | Scroll compressor | |
| CN100453813C (en) | Apparatus for varying capacity in scroll compressor | |
| KR20090084298A (en) | Apparatus for changing mode in scroll compressor | |
| US20110070114A1 (en) | Oil return valve for a scroll compressor | |
| EP2910785B1 (en) | Scroll compressor | |
| US9091266B2 (en) | Scroll compressor having a back pressure control valve for opening and closing a communication path in a stationary scroll | |
| KR100469461B1 (en) | Capacity changeable apparatus for scrool compressor | |
| KR20050062262A (en) | Oil supply structure for scrool compressor | |
| CN101372963A (en) | Vacuum preventing device of swirl compressor | |
| CN207830127U (en) | The compression mechanism of screw compressor | |
| KR20110105383A (en) | Scroll-type refrigerator compressor | |
| KR100486603B1 (en) | Capacity changeable apparatus for scroll compressor | |
| KR20130102357A (en) | Scroll compressor | |
| CN1840910B (en) | Apparatus for controlling quantity of feeding oil of inverter compressor | |
| US9970438B2 (en) | Scroll compressor | |
| CN106286292B (en) | Compression assembly, varying capacity screw compressor and air conditioner | |
| CN102705242A (en) | Compressor for realizing oil return quantity control of dual-channel back pressure cavity and control method | |
| KR101238208B1 (en) | Apparatus for preventing vacumm of scroll compressor | |
| KR102608742B1 (en) | Rotary compressor | |
| JP4045856B2 (en) | Compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090225 |