CN100343521C - Variable capacity scroll compressor - Google Patents
Variable capacity scroll compressor Download PDFInfo
- Publication number
- CN100343521C CN100343521C CNB2004100432853A CN200410043285A CN100343521C CN 100343521 C CN100343521 C CN 100343521C CN B2004100432853 A CNB2004100432853 A CN B2004100432853A CN 200410043285 A CN200410043285 A CN 200410043285A CN 100343521 C CN100343521 C CN 100343521C
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- Prior art keywords
- scroll compressor
- pass port
- safety check
- varying capacity
- pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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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
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
Abstract
Disclosed is a variable capacity scroll compressor including one or more bypass ports formed in a compression space, the bypass port being manipulated by intake/exhaust pressure of the compressor to control compression volume in multi-stages.
Description
Technical field
The present invention relates to a kind of scroll compressor, more particularly, relate to a kind of varying capacity scroll compressor that is configured to change the air displacement of compressor with multistage form.In addition, the present invention relates to a kind of varying capacity scroll compressor that is configured to change with multistage form the air displacement of compressor by means of simple supplementary structure.
Background technique
In general, the refrigeration system that is used for air conditioner or refrigerator absorbs and discharges heat by the refrigeration agent that flows in refrigeration cycle, thereby reduces the temperature of enclosed space.
This refrigeration system will be finished a series of cyclic processes of compression, condensation, expansion and evaporation of refrigeration agent.The Whirl type compressor used compression process of finishing in these a series of cyclic processes.
Because many documents of having announced disclose this scroll compressor, thereby omitted the general structure of scroll compressor and the detailed description of operation at this.
The following describes the reason that the decrement of scroll compressor should change.
When scroll compressor being selected, to consider its worst operation under predetermined Environmental Conditions usually for special-purpose, for example, required maximum compression volume (that is, adopting the heating operation of the air conditioner of heat pump) situation.
But the least favorable situation occurs in the actual operation hardly usually.In the actual mechanical process of compressor, the least favorable state neither need the situation of little minimum cylinder volume (as the process of refrigerastion of air conditioner).
Therefore, when considering that the least favorable situation is selected to have the compressor of big minimum cylinder volume, at the high compression ratio run duration, compressor moves under low loading condition, so, reduced the overall operation efficiency of system.
So, in order under normal running (operation) conditions, to improve overall operation efficiency, can bear the operating conditions under the least favorable situation again, require compressor to have transformable decrement.
In order to change the decrement of scroll compressor, the most widely used a kind of method is to adopt the rotating speed (RPM) of electric control compressor.
The advantage of this electric control method is to change decrement effectively.But some additional member need be set, for example be used for controlling exactly the transducer of motor RPM.And, when motor rotates, be difficult to guarantee the reliability of friction portion under higher RPM.
Summary of the invention
Therefore, the present invention aim to provide a kind of can overcome basically one or more owing to prior art restriction and the variable-displacement scroll compressor of the not enough problem that produces.
The purpose of this invention is to provide a kind of variable-displacement scroll compressor, this compressor can change decrement by bypass function when compressor electric motor rotates with constant RPM.
Another object of the present invention provides a kind of variable capacity scroll compressor, this compressor or utilize not compressed low-pressure fluid or utilize compressed high-pressure liquid to come control valve, thus can change decrement.
A further object of the present invention provides a kind of variable capacity scroll compressor, wherein, can two-stage or more multistage multistage mode minimum cylinder volume is controlled, thereby can under the various appointment operating conditionss of refrigeration system and heat pump, compress according to desired specific compression amount convection cell.
Another purpose of the present invention provides a kind of variable capacity scroll compressor, and this compression function is not having generator loss or need not provide under the situation of secondary power to control the vortex motor by changing decrement.
To provide other beneficial effects of the present invention, purpose and characteristics in the following description, part in these beneficial effects, purpose and the characteristics can clearly be learnt after having read hereinafter for a person skilled in the art, maybe can learn from enforcement of the present invention.The structure that purpose of the present invention and other advantages specifically provide in can word segment, claims and accompanying drawing by specification realizes and finishes.
In order to reach these purposes of the present invention and other advantages, according to purpose of the present invention, as description concrete and that summarize, variable capacity scroll compressor of the present invention comprises: a motor; One by motor-driven live axle; The one moving scroll member (orbiting scroll member) that spirals around live axle; One with moving scroll member engagement (mesh) to form quiet scroll member (stationary scrollmember) of compression volume; Along two or more by-pass ports that described compression volume forms, described by-pass port makes compressed fluid in two or more positions bypass, thereby can be with three grades or multistage form control minimum cylinder volume; One bypass passageways, it has first end that is connected with described by-pass port and second end that is connected with the air-inlet cavity that is in low-pressure state; One is used for safety check that bypass passageways is communicated with by-pass port; One control valve, it is used for optionally making one of the low-pressure fluid of this scroll compressor gas-entered passageway and the high-pressure liquid in this scroll compressor exhaust passage to act on safety check, makes it to be positioned at one of opening and closing position; With a control channel, it can make the pressure of the fluid of being selected by safety check act on this safety check.
Another aspect of the present invention provides a kind of variable capacity scroll compressor, and it comprises: along two or more by-pass ports that a compression volume of a scroll member forms, these by-pass ports make and are compressed fluid in two or more positions bypass; One bypass passageways, it has an end that is connected with each by-pass port and makes the bypass of fluid that is in compressive state; One is used to control the safety check that bypass passageways is in unlatching or closed condition; With a control valve, this control valve makes the high-pressure liquid in the scroll compressor exhaust passage optionally act on the safety check by default control channel at least, thereby the control safety check is in one of opening and closing position.
One side more of the present invention provides a kind of varying capacity scroll compressor, and it comprises: two or more by-pass ports that are formed in the compression volume, to be used for the compressed fluid of bypass; One is used to control the safety check that by-pass port is in the opening and closing state; With many control channels that are formed in the single component (single module), the exhaust pressure of compressor optionally acts on the described safety check, so that control the operating state of this safety check.
According to the present invention, under the situation that need not increase additional member, can change the decrement of scroll compressor easily.
And vortex of the present invention (scroll) can change decrement definitely according to the running state of two or more expectations.
Be appreciated that the front all is exemplary and explanat to describe, in general terms of the present invention and following detailed description of the present invention, and be used for further explaining claims.
Description of drawings
The accompanying drawing that the invention provides further understanding and formation the application part is shown embodiments of the present invention, and be used from explanation principle of the present invention with specification word segment one.In the accompanying drawing:
Fig. 1 is the cross-sectional view of the scroll compressor of an embodiment of the present invention;
Fig. 2 is the bottom view of quiet scroll member shown in Figure 1;
Fig. 3 is the enlarged view of " A " shown in Figure 1 part, and by-pass port is closed in the figure;
Fig. 4 is a schematic representation, the state of scroll member when it conceptually shows by-pass port and is closed;
Fig. 5 is the enlarged view of " A " shown in Figure 1 part, and by-pass port is unlocked in the figure;
The state of scroll member when the view of Fig. 6 conceptually shows by-pass port and is unlocked;
Fig. 7 is the cross-sectional view of the scroll compressor of another mode of execution of the present invention;
Fig. 8 is the present invention's cross-sectional view of the scroll compressor of a mode of execution again;
Fig. 9 is a schematic representation, and it conceptually shows the formation position of by-pass port shown in Figure 8;
Figure 10 is a sectional view of going up closed chamber in the scroll compressor of the present invention;
Figure 11 is a schematic representation, and it conceptually shows the shape of the quiet scroll member in the another mode of execution of the present invention.
Embodiment
Now with reference to the example shown in the accompanying drawing preferred implementation of the present invention is described in detail.As possible, the same reference numerals that is adopted in whole accompanying drawings is used for representing identical or like.
Fig. 1 is the cross-sectional view of the scroll compressor of an embodiment of the present invention.
Referring to Fig. 1, varying capacity scroll compressor of the present invention comprises: conventional compression part, be used for changing the by-passing part of decrement and be used for controlling the by-pass governing part of described by-passing part.
Conventional compression partly comprises: the closed chamber 11 that is used for limiting an enclosed cavity; Be arranged on the sealing plate 12 in the closed chamber 11, Seal cage is divided into low-pressure admission chamber 13 and high pressure gas chamber 14; The gas-entered passageway 22 that is connected with air-inlet cavity 13 is so that be fed to fluid to be compressed in the air-inlet cavity 13; The exhaust passage 23 that is connected with exhaust cavity 14 is so that discharge exhaust cavity 14 with compressed fluid; Be fixed on the quiet scroll member 15 on the inner periphery of closed chamber 11; Extend and have the live axle 19 of the upper end that is not just round from the motor (not shown); The moving scroll member 16 that is connected with live axle 19; Be formed on quiet vortex volume (the stationary spiral wrap) 17 on the quiet scroll member 15; Contact moving vortex volume (the orbiting spiral wrap) 18 that limits the fluid pressure channel by face with quiet vortex volume 17; The bearing 21 of supporting driving shaft 19 stably; With exhaust passage, center 26, this passage runs through the central shaft of quiet scroll member 15, thereby with compressed direct fluid exhaust cavity 14.
By-passing part comprises: form the by-pass port 24 by the part of quiet scroll member 15; Be formed on the safety check 25 of the rear side of by-pass port 24 with the control flows direction of flow; With branch out from safety check 25 so that the bypass passageways 31 of the direction of flow air-inlet cavity 13 of discharging by by-pass port 24.
By-pass governing partly comprises control channel 30 and the control valve 29 that is used for forming pilot pressure, wherein, the On/Off action of described pilot pressure control safety check 25, control valve 29 are optionally transmitted the pilot pressure that forms in the control channel 30 from low pressure and one of high- pressure channel 27 and 28.
Specifically, low-pressure channel 27 has first end that is connected with control valve 29 and second end that is connected with gas-entered passageway 22, so that the low pressure energy in the gas-entered passageway 22 is delivered in the low-pressure channel 27.High-pressure channel 28 has first end that is connected with control valve 29 and second end that is connected with exhaust passage 23, so that the high pressure energy in the exhaust passage 23 is delivered in the high-pressure channel 28.
In detail, safety check 25 can be made of float valve, and this float valve has the buoyant member that moves on the direction of the coupled condition that can change passage along exerting pressure.
For example, as shown in the drawing, cylindrical float is arranged in the circular shell, and this float can move freely along the direction that applies low pressure.Also may be selected to be, a spherical bead is set in housing movably, so that open or close fluid passage holes by means of this spherical bead.That is to say that any valve of controlling by pressure can both apply among the present invention.
In addition, control valve 29 can be made of the solenoid valve of default controller control.
The operation of described varying capacity scroll compressor will be described below.
When the live axle 19 that is connected with the motor (not shown) rotates, moving scroll member 16 rotations that link to each other with live axle 19.At this moment, quiet scroll member 15 is in stationary state.
When moving scroll member 16 rotates, be stored in low-pressure fluid in the air-inlet cavity 13 and enter and be formed on the moving vortex volume 18 on the moving scroll member 16 and be formed in the space that is limited between the quiet vortex volume 17 on the quiet scroll member 15, these fluids are compressed in this space then.
Compressed fluid enters exhaust cavity 14 by the exhaust passage, center 26 that the central shaft that runs through quiet scroll member 15 forms, and the high-pressure liquid in the exhaust cavity 14 is discharged from by exhaust passage 23.
Simultaneously, when safety check 25 cut out, fluid can not be discharged by by-pass port 24.But when safety check 25 was opened, these fluids were discharged from by by-pass port 24, are bypassed in the air-inlet cavity 13 by bypass passageways 31 then.Therefore, when safety check 25 was opened, decrement reduced.
In order to control the action of safety check 25, the by-pass governing part also comprises a control channel, and an end of this control channel is connected with safety check 25, so that pilot pressure acts on the safety check 25.Control valve 29 is arranged on the other end of control channel 30.By control valve 29, selectively be delivered in the control channel 30 from one of hydrodynamic pressure of low pressure and high- pressure channel 27 and 28.
Specifically, low pressure is connected with 23 with exhaust passage 22 with air inlet respectively with 28 with high-pressure channel 27, thus can with not compressed low-pressure fluid in traditional compression member and in traditional compression member compressed high-pressure liquid be fed to respectively in low pressure and high- pressure channel 27 and 28.
In more detail, move up by control valve shown in Figure 1 and when communicating with control channel 30, because high pressure is delivered in the control channel 30, safety check 25 moves down and cuts out when high-pressure channel 28.When safety check 25 cut out, because by-pass port 24 is closed, compressed fluid was not by bypass.As a result, compressed Fluid Volume is more and lose without any decrement.
When low-pressure channel 27 moves down by control valve shown in Figure 1 and when communicating with control channel 30, because low pressure is delivered in the control channel 30, the safety check 25 among Fig. 1 moves up and is unlocked.That is, the interaction by scroll member 15 and 16 makes the pressure of compressed fluid be lower than pressure in the gas-entered passageway 22, and safety check 25 is that float valve is opened.
In addition, when safety check 25 was opened, because by-pass port 24 is opened, compressed fluid was bypassed in the air-inlet cavity 13 by bypass passageways 31.Therefore, the minimizing of decrement is with by the Fluid Volume of bypass as many.
The bottom view of the quiet scroll member 15 in Fig. 2 presentation graphs 1.
Referring to Fig. 2, quiet vortex volume 17 is formed on the quiet scroll member 15, and the core of quiet vortex volume 17 is run through in exhaust passage, center 26.By-pass port 24 is formed on by on the scroll member in quiet vortex volume 17 compression volumes that limit, and makes compressed bypass of fluid whereby.
To describe the action of the scroll member of variable pressure below in detail.
Scroll member when the enlarged view of " A " in Fig. 3 and 5 presentation graphs 1 part, Fig. 4 and 6 conceptually show by-pass port and be in the opening and closing state.State when Fig. 3 and 4 expression by-pass ports are closed, the state when Fig. 5 and 6 expression by-pass ports are opened.
At first referring to Fig. 3, by-pass port 24 is formed on the position between the spaced portions of quiet vortex volume 17, and it is in closed condition by safety check 25.At this moment, owing to high pressure is acted on the safety check 25 by control channel 30, thereby safety check 25 cuts out by-pass port 24 securely.
Referring to Fig. 4, when by-pass port 24 is closed, can be formed with moving vortex volume 18 initial positions that combine from quiet vortex volume 17 as first admission space 41 that is limited at the compression volume between quiet vortex volume 17 and the moving vortex volume 18.
Be described in more detail below described admission space.
Be limited at the quiet vortex volume 17 that is in contact with one another and the admission space between the moving vortex volume 18 and can comprise two admission spaces.
One is that inner periphery and the moving vortex of quiet vortex volume 17 rolled up first admission space that is defined out when 18 outer periphery combines (meet).This first admission space is represented as first admission space 41 among Fig. 4.
Another is the second admission space (not shown) of the outer periphery of quiet vortex volume 17 formation when combining with the inner periphery of moving vortex volume 18.Although not shown second admission space in the accompanying drawing can assert that second admission space is to be formed by the coiling action (orbiting operation) of moving vortex volume 18.
The starting point of first admission space is positioned at the position shown in the reference character SC1 (compression beginning 1), and the starting point of second admission space is positioned at the position shown in the reference character SC2 (compression beginning 2).Because starting point SC1 and starting point SC2 are in symmetrical position, therefore this situation is referred to as the asymmetric operating pattern.That is to say that when the core with scroll member is a benchmark when being divided into bisection and two starting point SC1 and SC2 and being positioned at a side of a bisection, this situation is referred to as the asymmetric operating pattern.
Referring to Fig. 5, when safety check 25 moves up and when by-pass port 24 was opened, as mentioned above, because low pressure is delivered in the control channel 30, safety check 25 was opened, thereby compressed fluid is bypassed in the air-inlet cavity 13 by by-pass port 24 and passage 31.
Referring to Fig. 6, when by-pass port 24 was opened, second admission space 42 that is limited between quiet vortex volume 42 and the moving vortex volume 18 did not form with the primary importance that moving vortex volume 18 combines at first from quiet vortex volume 17.That is to say, it should be noted that second admission space 42 is from beginning to form through the position that forms by-pass port 24.
Formed admission space when below the more detailed description by-pass port being opened.
In this case, also comprise two volumes by the admission space that limits between the quiet and moving vortex volume 17 and 18 that is in contact with one another.
An admission space is first admission space that limits when the inner periphery of quiet vortex volume 17 combines with the outer periphery of moving vortex volume 18.This first admission space is expressed as second admission space 42 among Fig. 6.
Another admission space is the second admission space (not shown) of formation when combining with the inner periphery of moving vortex volume 18 in the outer periphery of quiet vortex volume 17.Although not shown second admission space can assert that second admission space is to form by the rotation of moving vortex volume 18.
In addition, because by-pass port 24 is formed near the inner periphery of quiet vortex volume, therefore, by-pass port 24 does not influence the formation of second admission space.In other words, because by-pass port 24 passive vortex volume 18 when forming second admission space is closed, therefore, second admission space is not subjected to the influence of the pressure of by-pass port 24.Even the impassive vortex volume 18 of by-pass port 24 is closed, the built-in function of bypass operation also is out of question.
When beginning to compress, the starting point of first admission space is limited at the position shown in the reference number C S1, and the starting point of second admission space is formed on the position shown in the reference number C S2.That is to say that the center that starting point CS1 and CS2 are in scroll member 15 and 16 is the symmetrical position of benchmark.This is referred to as the symmetrical operation pattern.
Simultaneously, in order to understand desirable symmetrical operation pattern, be the opposite side that benchmark is formed on by-pass port 24 the vortex starting point of quiet vortex volume 17 with the center of quiet scroll member 15.
What be worth to remind is, first admission space 41 shown in Figure 4 is compared with second admission space 42 shown in Figure 6, and they are different each other.
That is to say, because the volume of admission space changes according to the state (On/Off state) of by-pass port 24, the minimum cylinder volume that is limited by second admission space 42 when the minimum cylinder volume that is limited by first admission space 41 when by-pass port is closed is opened with by-pass port is different each other.
According to a series of test, shown when by-pass port forms position shown in the figure, compare by using a part of collapsible volume (a part of load) to compress the minimum cylinder volume that is obtained when being in opening state, when by-pass port 24 is in closed condition, will increase by 18% by using maximum volume allowable tolerance (all loads) to compress the minimum cylinder volume that is obtained with by-pass port 24.
That is to say, according to the change as the various factorss such as state of a control of the On/Off state of the On/Off state of by-pass port 24, safety check 25 and control valve 29, the operation of scroll compressor will change over one of symmetrical operation pattern and asymmetric operating pattern.In addition, the admission space of scroll compressor increases with the On/Off state of by-pass port 24 or reduces, thereby changes the decrement of scroll compressor.
For example, control valve 29 is controlled to when high-pressure channel 28 is communicated with control channel 30, the safety check 25 among the figure moves down, and by-pass port 24 is closed.The starting point of first and second admission spaces is positioned at asymmetric position, and scroll compressor is with the asymmetric operating mode operation, thus the increase decrement.Therefore, this asymmetric operating pattern is applicable to the heat supply mode of the air conditioner that for example needs bigger minimum cylinder volume.
When control valve 29 being controlled to when low-pressure channel 27 is communicated with control channel 30, the safety check 25 among the figure moves up, and by-pass port 24 is opened.The starting point of first and second admission spaces is in symmetrical position, and scroll compressor is with the symmetrical operation mode operation, thereby has reduced decrement.Therefore, this symmetrical operation pattern is applicable to the cooling pattern of the air conditioner that for example needs corresponding minimum cylinder volume.
Compressor of the present invention has more than and is limited in the air conditioner that applies to described example.That is to say that compressor of the present invention is applicable to any system that needs to change decrement.
Fig. 7 represents the scroll compressor of second embodiment of the invention.
As shown in the drawing, except the linkage structure around the control valve, the scroll compressor of this mode of execution is identical with first mode of execution.
That is to say that control channel 52, control valve 53 and high-pressure channel 51 are identical with first mode of execution.But, in this embodiment, do not form the low-pressure channel 27 that control valve selectively communicates with control channel that passes through in first mode of execution.
When not forming this low-pressure channel 27, even the control valve 53 among this figure moves down, the low pressure in the gas-entered passageway 22 is not passed in the control channel 52.
With regard to this point, because the internal pressure of control channel 52 is lower than the intermediate pressure of compressed fluid in the scroll compressor, so safety check 25 is opened.This is because close and discontinuously under the state of feed high-pressure liquid, the air of some leakages disappears the high pressure conditions of control channel inboard at control valve 53.
For this reason, safety check 25 can use the float valve that can move freely in housing.
Fig. 8 represents the cross-sectional view of the scroll compressor of another mode of execution of the present invention.
Referring to Fig. 8, some parts of present embodiment are identical with the mode of execution shown in Fig. 1 to 7.Specifically, these two mode of executions the fluid that is compressed by scroll compressor the interstage by bypass, to cause aspect not compressing before the interstage be identical.
Except that described content, the characteristics of present embodiment are: adopted two or many control channel, control valve, low-pressure channel, by-pass port etc. in single scroll compressor, thereby multistage in service, can be according to being controlled the poor of minimum cylinder volume by the volume of the cooling medium of bypass and compressed volume of the cooling medium.
In other words, can control a plurality of by-pass ports respectively, make compressed refrigeration agent by-pass port bypass by separately under different conditions, thereby may command be multistage in service by the volume of the cooling medium of bypass.
In more detail, first by-pass port 241, first safety check 251, first bypass passageways 311, first control channel 301, first control valve 291, first high-pressure channel 281 and first low-pressure channel 271 constitute first by-pass structure that makes the bypass of fluid of being compressed by scroll member.
By controlling the flow channel of described first by-pass structure, in spiral motion/the static and compressed while of fluid owing to scroll member 15,16, fluid is caused decrement to change by bypass.Because other structures except that described structure do not repeat them here with identical shown in Fig. 1 to 7.
In addition, second by-pass port 242, second safety check 252, second by-pass 312, second control channel 302, second control valve 292, second high-pressure channel 282 and second low-pressure channel 272 constitute second by-pass structure, make compressed bypass of fluid.
This second by-pass structure is to make at first by the first by-pass structure bypass and the beginning structure of compressed bypass of fluid once more., from the coiling of the quiet vortex shell 17 in Hand of spiral upper edge, compare with second by-pass port 242, first by-pass port 241 is formed on the inside for this reason.
Fluid by the situation of the second by-pass structure bypass in, compare when opening with first by-pass structure only, the Fluid Volume that is compressed by scroll compressor further reduces.
Moreover the 3rd control channel 303, the 3rd control valve 293, the 3rd high-pressure channel 283 and the 3rd low-pressure channel 273 constitute the 3rd by-pass structure, make compressed bypass of fluid.Although because the narrow limitation of accompanying drawing does not illustrate the 3rd by-pass port, the 3rd safety check and the 3rd bypass passageways, they are in structure and formal identical with second by-pass structure with first by-pass structure.Specifically, the coiling of quiet vortex volume 17 is compared with second by-pass port 242 from the Hand of spiral upper edge, and the 3rd by-pass port is formed on the inside.
The 3rd by-pass structure is to make at first by first by-pass structure and the second by-pass structure bypass and the beginning structure of compressed bypass of fluid once more.For this reason, the coiling of quiet vortex volume 17 is compared with 242 with first and second by-pass ports 241 from the Hand of spiral upper edge, and the 3rd by-pass port (not shown) is formed on the inside.
And, according to the present invention,, having formed top seal chamber 112 and Sealing 61 on scroll compressor top, the core of sealing chamber has an opening, and many control channels 301,302 and 303 are passed this opening; Described Sealing is used for sealing fully the opening of top seal chamber 112 and the space between control channel 301,302 and 303.
To describe the formation position of by-pass port 241,242 and 243 below in detail.
Fig. 9 shows the formation position of by-pass port of the present invention.
Referring to Fig. 9, quiet vortex volume 17 is formed on the inside of quiet scroll member 15.In the spiral space that forms along quiet vortex volume 17, first by-pass port 241, second by-pass port 242 and the 3rd by-pass port 243 form by the order from the outside to the inboard.The first and the 3rd by- pass port 241 and 243 makes the bypass of fluid that is inhaled into by second admission space.Second by-pass port 242 is walked around second admission space.As previously mentioned, the surface of contact of rolling up and moving between the vortex volume with quiet vortex is that benchmark can be distinguished first by-pass port and second by-pass port.
The formation position that of course it is to be understood that a plurality of by-pass ports 241,242 and 243 is not limited to the formation position shown in Fig. 9.In other words, these by-pass ports can be formed on except that other diverse location places these three positions.And, by-pass port or be formed on first admission space or be formed on position in second admission space can be with the required concrete minimum cylinder volume of scroll compressor difference.
For example, when by-pass port was formed on position shown in Figure 9, the variation according to the form below 1 of suggestion decrement was realized.
Table 1
| Minimum cylinder volume | First by-pass port | Second by-pass port | The 3rd by-pass port |
| 100％ | Close | Close | Close |
| 80％ | Open | Close | Close |
| 60％ | Open | Open | Close |
| 40％ | Open | Open | Open |
According to acting on the opened by pressure on the safety check or closing by-pass port, can make the decrement of compressing by this scroll compressor by four changes not at the same level.In other words, when scroll compressor of the present invention was applied in refrigeration system or the heat pump, this scroll compressor can move under three kinds or multiple different concrete minimum cylinder volume.
Simultaneously, in the by-pass port of opening 241,242 and 243, when the most inboard by-pass port when quiet vortex volume 17 is opened, no matter be positioned at the by-pass port in the outside of inboard by-pass port and whether open, all minimum cylinder volume can be set at an expected value.For example, when being intended to make scroll compressor under minimum cylinder volume is 40% situation, to move, be to open or close the operation that does not influence scroll compressor if open the 3rd by-pass port 243, the first by-pass ports 241.But under the situation that first by-pass port 241 is closed, because being used for the power of motor of compressed fluid increases a lot, the total efficiency of device will descend, and this is undesirable.
It should be noted that when the most inboard by-pass port when quiet vortex volume 17 is opened, no matter be arranged in that the by-pass port in the outside of inboard by-pass port is a described by-pass port of opening or be not limited to be formed on same space, all minimum cylinder volume can be set at an expected value.In more detail, a plurality of by-pass ports that are formed in first admission space only influence first admission space, and a plurality of by-pass ports that are formed in second admission space only influence second admission space.For example, in the first and the 3rd by- pass port 241 and 243 in being formed on second admission space, if the 3rd by-pass port 243 is opened, no matter the 3rd by-pass port 243 is to open or close, and first by-pass port 241 can obtain fixing minimum cylinder volume.But, should be noted that this situation and by-pass port are corresponding by the situation that vortex winds off when opening or closing.
Figure 10 is the partial sectional view of the top seal chamber of scroll compressor of the present invention.
Referring to Figure 10, scroll compressor comprises top seal chamber 112 and single Sealing 61, and the whole bottom surface and the top of sealing chamber are opened wide near core; The upper shed that many control channel 301,302 and 303 is passed top seal chamber 112 partly is introduced in the top seal chamber 112; Described Sealing is used for sealing the space between the open part of control channel 301,302,303 and top seal chamber 112, leaks to prevent the high-pressure liquid in the exhaust cavity 14.
And described many control channels 301,302 and 303 are fabricated in the single component, so that caused sealing is difficult when being provided with and further preventing to form a plurality of opening.
In addition, the lower end of Sealing 61 predetermined length that stretches out, to prevent Sealing 61 because the high pressure of exhaust cavity 14 and deviating from outwardly.
Figure 11 conceptually shows the shape of the quiet scroll member in another mode of execution of the present invention.
Referring to Figure 11, mass part is identical with relevant portion among Fig. 9.But, it should be noted that the 4th by-pass port 244 is formed on inner side along quiet vortex volume 17 spiral-shaped.Therefore, owing to formed a by-pass port again, the progression that minimum cylinder volume is changed is more.Following table 2 illustrates and has described this many compression stages.
Table 2
| Minimum cylinder volume | First by-pass port | Second by-pass port | The 3rd by-pass port | The 4th by-pass port |
| 100％ | Close | Close | Close | Close |
| 80％ | Open | Close | Close | Close |
| 70％ | Close | Open | Close | Close |
| 60％ | Open | Close | Open | Close |
| 40％ | Close | Open | Close | Open |
As above shown in the table 2, when forming four by-pass ports, the decrement of scroll compressor is with the variation of Pyatyi.As a result, when refrigeration system is moved, can tell the volume of this refrigeration system with multistage form.And,, can realize minimum decrement because all by-pass ports are all opened.
Moreover similar to described content, in the by-pass port that admission space forms, when the by-pass port at the inner side place that is arranged on quiet vortex volume was in opening state, the On/Off that is positioned at the by-pass port in the most inboard by-pass port outside did not influence minimum cylinder volume.
For example, in last table 2, when minimum cylinder volume was the unlatching of the 40% and the 4th by-pass port, the On/Off of second by-pass port did not influence the variation of decrement, but caused that the motor work done increases.
As mentioned above, by controlling control valve simply, can make compressed bypass of fluid easily.Specifically, the mainspring of control by-pass port is optionally to utilize formed low pressure of fluid that is not inhaled in the conventional compression part and the formed high pressure of fluid that is partly compressed by conventional compression.Therefore, can make the structure of scroll compressor simpler, reduce manufacture cost simultaneously.
In addition, because can change decrement with multistage form, this scroll compressor can operation better under refrigeration system or the required minimum cylinder volume of heat pump.
And, in varying capacity scroll compressor of the present invention, can under the situation that does not change compressor electric motor RPM, utilize bypass action to realize the change of decrement with multistage form by adopting simple structure.
In addition, because the valve that is used for making the decrement of scroll compressor to change be designed under the situation that does not increase optional feature by in compression member not the pressure of compressed fluid and in compression member the pressure control of compressed fluid, the therefore manufacture cost that can save scroll compressor.
Moreover because this scroll compressor can move under the multistage compression volume, so this scroll compressor can move under the minimum cylinder volume that is suitable for most a certain system.
In addition, many control channels are manufactured in the single component, can in operating range, boost productivity whereby.
For a person skilled in the art, the present invention is made various modification and change is conspicuous.Therefore, to the present invention includes those remodeling and the conversion in the protection domain that falls into described claims and equivalents thereof.
Claims (19)
1. varying capacity scroll compressor comprises:
One motor;
One by described motor-driven live axle;
The one moving scroll member that spirals around described live axle;
One with described moving scroll member engagement to form the quiet scroll member of a compression volume;
It is characterized in that described compressor also comprises:
Along two or more by-pass ports that described compression volume forms, described by-pass port makes compressed fluid in two or more positions bypass, whereby with three grades or multistage form control minimum cylinder volume;
One bypass passageways, it has first end that is connected with described by-pass port and second end that is connected with the described air-inlet cavity that is in low-pressure state;
One is used for safety check that described bypass passageways is communicated with described by-pass port;
One control valve, it is used for optionally making it to be in one of opening and closing position with the described safety check of one of high-pressure liquid in the exhaust passage of the low-pressure fluid of the gas-entered passageway of described scroll compressor and described scroll compressor control; With
One makes the pressure of the fluid of being selected by described safety check act on control channel on the described safety check.
2. varying capacity scroll compressor according to claim 1 is characterized in that, the described safety check that described control valve is connected with described safety check passes a position of the top seal chamber at a covering one hyperbaric chamber top.
3. varying capacity scroll compressor according to claim 1 is characterized in that, described compressor also comprises:
Partly cover a closed chamber of described compressor;
Two or more control channels that described control valve is linked to each other with described safety check; With
Be formed on the Sealing on the part of described control channel and the contacted contact segment of described closed chamber, described control channel is converged at this contact position place and is passed described closed chamber.
4. varying capacity scroll compressor according to claim 3 is characterized in that, is formed on described control channel and passes the described Sealing at the described position of described closed chamber and have the downside that a turning extends outwardly, with not separated.
5. varying capacity scroll compressor according to claim 1 is characterized in that, described by-pass port is formed on the inner periphery and/or the outer periphery part of contiguous one quiet vortex volume.
6. varying capacity scroll compressor according to claim 1 is characterized in that, described by-pass port is formed on the described quiet vortex volume.
7. varying capacity scroll compressor according to claim 1 is characterized in that, described by-pass port be formed on first and second compression volumes one of at least in.
8. varying capacity scroll compressor according to claim 1 is characterized in that described safety check is by pressure control.
9. varying capacity scroll compressor according to claim 1 is characterized in that, described by-pass port is three or four.
10. varying capacity scroll compressor according to claim 1 is characterized in that, described by-pass port has a relief opening that links to each other with a suction port of described scroll compressor.
11. varying capacity scroll compressor according to claim 1 is characterized in that, the little lateral movement of pressure in the pressure of the pressure of described control valve and compressed fluid of described safety check.
12. varying capacity scroll compressor according to claim 1 is characterized in that, makes described safety check motion by means of hydrodynamic pressure.
13. varying capacity scroll compressor according to claim 1 is characterized in that described control channel comprises many control channels, these control channels are combined into a branch of when entering described scroll compressor inboard.
14. varying capacity scroll compressor according to claim 1 is characterized in that, also comprises a Sealing, the sealing part is used for sealing when described control channel enters described scroll compressor inboard and the contacted part of described control channel.
15. varying capacity scroll compressor according to claim 1 is characterized in that described control channel forms a single component.
16. a varying capacity scroll compressor is characterized in that, described compressor also comprises:
Be formed in the compression volume and be used for making two or more by-pass ports of compressed bypass of fluid:
One is used to control the safety check of described by-pass port opening and closing state; With
Form many control channels of a single component, the exhaust pressure of described compressor optionally acts on the described safety check, to control the operating state of described safety check.
17. varying capacity scroll compressor according to claim 16 is characterized in that, described single component is formed on the position that described compressor contacts with described control channel.
18. varying capacity scroll compressor according to claim 16 is characterized in that, described by-pass port makes described scroll compressor move with multistage form.
19. varying capacity scroll compressor according to claim 16 is characterized in that, described single component and the contacted part of described compressor are sealed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR51772/03 | 2003-07-26 | ||
| KR1020030051772A KR100547321B1 (en) | 2003-07-26 | 2003-07-26 | Scroll compressor with volume regulating capability |
| KR51772/2003 | 2003-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576603A CN1576603A (en) | 2005-02-09 |
| CN100343521C true CN100343521C (en) | 2007-10-17 |
Family
ID=34075004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100432853A Expired - Fee Related CN100343521C (en) | 2003-07-26 | 2004-05-17 | Variable capacity scroll compressor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20050019177A1 (en) |
| KR (1) | KR100547321B1 (en) |
| CN (1) | CN100343521C (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20050012635A (en) | 2005-02-02 |
| US20050019177A1 (en) | 2005-01-27 |
| CN1576603A (en) | 2005-02-09 |
| KR100547321B1 (en) | 2006-01-26 |
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