CN110462217A - Scrawl compressor - Google Patents
Scrawl compressor Download PDFInfo
- Publication number
- CN110462217A CN110462217A CN201880019772.6A CN201880019772A CN110462217A CN 110462217 A CN110462217 A CN 110462217A CN 201880019772 A CN201880019772 A CN 201880019772A CN 110462217 A CN110462217 A CN 110462217A
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- CN
- China
- Prior art keywords
- back pressure
- pressure chamber
- whirlpool disk
- switching valve
- whirlpool
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0021—Systems for the equilibration of forces acting on the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The insufficiency of Back pressure control valve caused by the present invention inhibits because of pollutant.Scrawl compressor includes: the whirlpool disk unit with fixed eddy plate and rotation whirlpool disk；For the discharge room (H3) to be spued by the fluid after the disk cell compression of whirlpool；Make the back pressure chamber (H4) that rotation whirlpool disk plays a role towards the back pressure that fixed eddy plate presses；And it is disposed in the switching valve (900) of the midway for the back pressure supply passageway (L1) for being connected to discharge room (H3) with back pressure chamber (H4).Moreover, switching valve (900) switches between the first state for being connected to discharge room (H3) with back pressure chamber (H4) and the second state for being connected to back pressure chamber (H4) with suction chamber (H1) according to the working condition of whirlpool disk unit.
Description
Technical field
The present invention relates to the Scrawl compressors that the fluids such as a kind of pair of gas refrigerant are compressed.
Background technique
Scrawl compressor includes whirlpool disk unit, which has intermeshing fixed eddy plate and rotation whirlpool disk.
Whirlpool disk unit passes through the axle center revolution rotary motion for making to rotate whirlpool coiling fixed eddy plate, to make to be fixed whirlpool disk and rotation whirlpool disk
The volume variation for the discharge chambe that zoning goes out, and gas refrigerant compress and spued.In Scrawl compressor, lead to
Crossing makes back pressure effect in the back side of rotation whirlpool disk and presses towards fixed eddy plate, to inhibit to rotate whirlpool disk during compression operation
It is detached from fixed eddy plate, to be not likely to produce mal-compression.At this point, such as Japanese Patent Laid-Open 2012-207606 bulletin (patent text
Offer 1) documented by like that, the back pressure at the back side for acting on rotation whirlpool disk is equipped on the connection for being connected to back pressure chamber with suction chamber
The Back pressure control valve of access is adjusted.
Existing technical literature
Patent document
Patent document 1: Japanese Patent Laid-Open 2012-207606 bulletin
Summary of the invention
The technical problems to be solved by the invention
In back pressure chamber, such as when generating pollutant (foreign matter) because of abrasion of sliding position etc., pollutant will be led
Enter to Back pressure control valve.Moreover, when pollutant imported into Back pressure control valve, for example, in the filtering for being built in Back pressure control valve
Blocking will be generated in device, the function of Back pressure control valve can be lost, so that back pressure can not be adjusted suitably.
Therefore, the purpose of the present invention is to provide a kind of Scrawl compressor, back pressure control caused by capable of inhibiting because of pollutant
The insufficiency of valve processed.
Technical scheme applied to solve the technical problem
Therefore, Scrawl compressor includes: whirlpool disk unit, and above-mentioned whirlpool disk unit has fixed eddy plate and rotation whirlpool disk；It spits
Room out, above-mentioned discharge room by the fluid after the disk cell compression of whirlpool for being spued；Back pressure chamber, above-mentioned back pressure chamber make to rotate whirlpool disk towards admittedly
The back pressure of static vortex disk pressing plays a role；And switching valve, above-mentioned switching valve are disposed in the company for being connected to discharge room with back pressure chamber
The midway on road all.Moreover, switching valve is according to the working condition of whirlpool disk unit in the first shape for being connected to discharge room with back pressure chamber
Switch between state and the second state for being connected to the outside of back pressure chamber and the back pressure chamber.
Invention effect
According to the present invention, the insufficiency of Back pressure control valve caused by capable of inhibiting because of pollutant.
Detailed description of the invention
Fig. 1 is the longitudinal section view for indicating an example of Scrawl compressor.
Fig. 2 is the block diagram being illustrated to the flowing of gas refrigerant and lubricating oil.
Fig. 3 is the main portion sectional view of the first embodiment of switching valve when indicating work.
Fig. 4 is the main portion sectional view for indicating the first embodiment of switching valve when stopping.
Fig. 5 is the main portion sectional view of the second embodiment of switching valve when indicating work.
Fig. 6 is the main portion sectional view for indicating the second embodiment of switching valve when stopping.
Fig. 7 is the main portion sectional view of the third embodiment of switching valve when indicating work.
Fig. 8 is the main portion sectional view for indicating the third embodiment of switching valve when stopping.
Fig. 9 is the main portion sectional view for indicating the variation of switching valve of first embodiment.
Figure 10 is the main portion sectional view for indicating the variation of switching valve of second embodiment.
Specific embodiment
Hereinafter, embodiment for carrying out the present invention is described in detail referring to attached drawing.
Fig. 1 shows an examples of Scrawl compressor.
Scrawl compressor 100 is the refrigerant circuit (external equipment) for being for example loaded into Vehicular air adjustment equipment,
And the gas refrigerant (fluid) sucked from the low-pressure side of refrigerant circuit compress and spued.Scrawl compressor
100 include: shell 200；Whirlpool disk unit 300, the whirlpool disk unit 300 compress the gas refrigerant of low pressure；Electric motor
400, which drives movable orbiting scroll low pressure 300；Inverter 500, the inverter 500 control electric motor 400；
And supporting member 600, the supporting member 600 is by an overhang bracket of the drive shaft 420 of electric motor 400 at free rotation
Turn.Here, the refrigerant as refrigerant circuit, for example, CO can be used2(carbon dioxide) refrigerant.Although in addition, Scrawl
Compressor 100 enumerates integral inverter as an example but it is also possible to be inverter separation type.
Shell 200 is configured to include: front casing 220, and the front casing 220 is to whirlpool disk unit 300, electric motor 400, inversion
Device 500 and supporting member 600 are accommodated；Rear casing 240, the rear casing 240 are anchored on the one end of front casing 220；And
Inverter cover 260, the inverter cover 260 are anchored on the another side of front casing 220.In addition, passing through front casing 220, rear casing
240 and inverter cover 260 be fastened together by multiple fasteners 700 for example including bolt and washer, to constitute Scrawl pressure
The shell 200 of contracting machine 100.
Front casing 220 is configured to include: cylindric peripheral wall portion 222；And disk-shaped divider wall parts 224, the separation
The inner space of peripheral wall portion 222 is divided into two by wall portion 224 in the axial direction.Here, cylindric can be identified as justifying to visually observe
The degree of tubular, can also such as forming the flank of reinforcement, the axle sleeve of installation in cylindric outer peripheral surface (about
It is shape, same as below).The inner space of front casing 220 is divided into the first space 220A and second space by divider wall parts 224
220B, wherein above-mentioned first space 220A accommodates whirlpool disk unit 300, electric motor 400 and supporting member 600, above-mentioned
Second space 220B accommodates inverter 500.
The opening of the one end of peripheral wall portion 222 is closed by disk-shaped rear casing 240.In addition, the other end of peripheral wall portion 222
The opening of side is closed by inverter cover 260.It is formed with thus in the central portion of the one side of divider wall parts 224 to peripheral wall portion 222
The cylindric supporting part 224A that one end extends.Moreover, the other end of the drive shaft 420 of electric motor 400 is via indentation
Bearing 720 to the inner peripheral surface of supporting part 224A is supported on supporting part 224A in a manner of rotating freely.
In addition, being formed with the inhalation port P1 of gas refrigerant in peripheral wall portion 222.Low-pressure side from refrigerant circuit
Gas refrigerant is sucked via inhalation port P1 to the first space 220A of front casing 220.Therefore, the first of front casing 220 is empty
Between 220A play a role as the suction chamber H1 of gas refrigerant.In addition, gas refrigerant is in electric motor in suction chamber H1
It circulates around 400, to be cooled down to electric motor 400.Moreover, being located at the first of an axial side for electric motor 400
Space 220A is connected to the first space 220A for being located at another party, to constitute a suction chamber H1.In suction chamber H1, gas system
Cryogen is flowed as the fluid-mixing containing micro lubricating oil.
Rear casing 240 is anchored on the opening of the one end of the peripheral wall portion 222 positioned at front casing 220 by multiple fasteners 700
End.Moreover, rear casing 240 closes the opening of the one end of front casing 220.In addition, being formed with discharge in rear casing 240
Port P2, the discharge port P2 by whirlpool disk unit 300 compressed gas refrigerant spit to the high-pressure side of refrigerant circuit
Out.In addition, being incorporated with oil eliminator 740 in the inside of rear casing 240, the oil eliminator 740 is by lubricating oil from by whirlpool disk unit
It is separated in 300 compressed gas refrigerants.Gas refrigerant after being isolated lubricating oil by oil eliminator 740 (further includes residual
There are the gas refrigerants of micro lubricating oil) it spues via discharge port P2 towards the high-pressure side of refrigerant circuit.Another party
Face is guided by the lubricating oil that oil eliminator 740 is isolated to the back pressure supply passageway L1 described in detail below.
Whirlpool disk unit 300 is contained in the one end of front casing 220.Specifically, whirlpool disk unit 300 is configured to include: solid
Static vortex disk 320, the fixed eddy plate 320 are fixed on the one side of rear casing 240；And rotation whirlpool disk 340, the rotation whirlpool disk 340 with
The mode for clipping fixed eddy plate 320 is configured at the opposite side of rear casing 240.
Fixed eddy plate 320 is configured to include: disk-shaped bottom plate 322, which is fixed on the one side of rear casing 240；
And the circular part (blade of scroll shape) 324 of involute curve, the circular part 324 is from the one of bottom plate 322 towards rotation whirlpool
Disk 340 extends.Rotation whirlpool disk 340 is configured to include: disk-shaped bottom plate 342, which is configured to and fixed eddy plate 320
Bottom plate 322 it is opposite；And the circular part 344 of involute curve, the circular part 344 is from the one of bottom plate 342 towards fixed eddy plate
320 extend.
In addition, fixed eddy plate 320 and rotation whirlpool disk 340 are in the circumferential angle around part 324 and around the circumferential direction of part 344
Angle offset with one another in the state of, nibbled in a manner of localized contact each other by the side wall around part 324 and the side wall around part 344
It closes.Therefore, in whirlpool disk unit 300, fixed eddy plate 320 and rotation whirlpool disk 340 between zoning go out lunate confined space,
The discharge chambe H2 that gas refrigerant is compressed.
It is formed with discharge access L2 in the central part of the bottom plate 322 of fixed eddy plate 320, discharge access L2 will be by discharge chambe
The compressed gas refrigerant of H2 spues.In addition, the central part in the another side of bottom plate 322 is formed with by columned recess portion structure
At discharge room H3, discharge room H3 is temporarily stored via discharge access L2 and the gas refrigerant that spues from discharge chambe H2.And
And the check valve 326 being for example made of leaf valve is installed in the another side of bottom plate 322, which allows from discharge chambe
Gas refrigerant from H2 to discharge room H3 flowing, but prevent from discharge room H3 to the flowing of the gas refrigerant of discharge chambe H2.
Electric motor 400 is for example made of three-phase alternating current motor, and is configured to include drive shaft 420, rotor 440 and stator
Iron core unit 460, the stator core unit 460 are configured at the radial outside of rotor 440.In addition, the battery from vehicle is (not
Diagram) DC current alternating current is converted by inverter 500, and supply to the stator core unit of electric motor 400
460。
Drive shaft 420 is linked to rotation whirlpool disk 340 via aftermentioned crank mechanism, and the rotation of electric motor 400 is driven
Power is transferred to rotation whirlpool disk 340.The one end of drive shaft 420, i.e. rotation 340 side end of whirlpool disk will be formed in supporting member
600 through-hole 600A runs through, and the bearing 760 for being fixed on supporting member 600 is supported in a manner of rotating freely.Drive shaft
420 the other end is supported on the bearing for being pressed into the supporting part 224A of front casing 220 in a manner of rotating freely as described above
720。
The drive shaft 420 of axis hole of the rotor 440 via chimeric (such as indentation) to the radial center for being formed in rotor 440 and
The radially inner side of stator core unit 460 is supported in a manner of rotating freely.When due to from the power supply of inverter 500 fixed
When generating magnetic field in sub- iron core unit 460, rotary force can be acted on rotor 440, to drive drive shaft 420 to rotate.
Supporting member 600 in bottomed cylindrical with 322 same outer diameter of bottom plate of fixed eddy plate 320, and have diameter with
The columned inner peripheral surface with the level reduced in two stages from the open side of above-mentioned bottomed cylindrical to inner part.And
And the rotation whirlpool disk 340 of whirlpool disk unit 300 is contained in the space gone out by the inner peripheral surface zoning of the major diameter side of supporting member 600.
The open end of supporting member 600 is for example anchored on the one side of the bottom plate 322 of fixed eddy plate 320 by fastener (not shown).Cause
This, the opening of supporting member 600 is fixed the closing of whirlpool disk 320, is gone out with zoning and presses rotation whirlpool disk 340 towards fixed eddy plate 320
Back pressure chamber H4.
In addition, inner peripheral surface in the path side of supporting member 600 is chimeric bearing 760, the bearing 760 is to rotate freely
The one end of the drive shaft 420 of mode supports electric motor 400.Moreover, in the bottom wall for the innermost portion for being located at supporting member 600
Radial central portion is formed with the perforative through-hole 600A of one end for drive shaft 420.It is equipped between bearing 760 and bottom wall close
Component 780 is sealed, to ensure the air-tightness of back pressure chamber H4.
In the space that the inner peripheral surface zoning of the major diameter side by supporting member 600 goes out, i.e. the step of small diameter portion and large-diameter portion
Cricoid thrust plate 800 is configured between portion and the bottom plate 342 for rotating whirlpool disk 340.The stage portion of supporting member 600 is via thrust
Plate 800 receives to carry out the thrust of spinning whirlpool disk 340.In the stage portion of supporting member 600 and the bottom plate 342 of rotation whirlpool disk 340
The position abutted with thrust plate 800 be separately equipped with the containment member 820 of the air-tightness for ensuring back pressure chamber H4.
It is formed with back pressure supply passageway L1 in rear casing 240, fixed eddy plate 320 and supporting member 600, back pressure supply is logical
The lubricating oil that road L1 isolates the oil eliminator 740 for being loaded into rear casing 240 to by 600 zoning of supporting member go out back pressure
Room H4 supply.Therefore, the lubricating oil supplied from oil eliminator 740 to back pressure chamber H4, which is used as, will rotate whirlpool disk 340 towards fixed eddy plate
The back pressure of 320 pressings.The throttle orifice 840 limited the flow of lubricating oil is equipped in the midway of back pressure supply passageway L1.
In addition, back pressure supply passageway L1 is enumerated as making an example of discharge room H3 with the back pressure chamber H4 communication paths being connected to.
Back pressure control valve 860 is installed in the small diameter portion of supporting member 600, the Back pressure control valve 860 is according to back pressure chamber H4
Back pressure Pm and suction chamber H1 suction pressure Ps work, and the back pressure Pm of back pressure chamber H4 is adjusted.That is, Back pressure control valve
860 open when the back pressure Pm of back pressure chamber H4 is bigger than goal pressure and the lubricating oil of back pressure chamber H4 are discharged to suction chamber H1, from
And decline the back pressure Pm of back pressure chamber H4.On the other hand, Back pressure control valve 860 is smaller than goal pressure in the back pressure Pm of back pressure chamber H4
When close and stop lubricating oil from back pressure chamber H4 to suction chamber H1 be discharged, so that the back pressure Pm of back pressure chamber H4 be made to rise.In this way, back
The back pressure Pm of back pressure chamber H4 is adjusted to goal pressure by pressure control valve 860.
Refrigerant is formed between the inner peripheral surface of the peripheral wall portion 222 of front casing 220 and the outer peripheral surface of supporting member 600 to lead
Enter access L3, which, which imports access L3, is connected to suction chamber H1 and the space H5 for the peripheral part for being located at whirlpool disk unit 300, and
Gas refrigerant is imported from suction chamber H1 to space H5.Therefore, the pressure of space H5 is equal with the pressure of suction chamber H1.
Crank mechanism is configured to include: cylindric shaft sleeve part 880, bottom plate of the shaft sleeve part 880 towards rotation whirlpool disk 340
342 another side protrusion is formed；Crank-pin 882, the crank-pin 882 are erected on an end face of drive shaft 420 with eccentric state；Partially
Heart bushing 884, the eccentric bush 884 are installed on crank-pin 882 with eccentric state；And sliding bearing 886, the sliding bearing
886 are embedded in shaft sleeve part 880.Moreover, eccentric bush 884 is via sliding bearing 886 can be supported on axis in a manner of relative rotation
Set portion 880.In addition, the one end in drive shaft 420 is equipped with the counterweight 888 of the centrifugal force to anti-rotation whirlpool disk 340.This
Outside, it though the illustration is omitted, is equipped with the rotation prevented the rotation of rotation whirlpool disk 340 and prevents mechanism.Therefore, whirlpool disk is rotated
340 can its rotation be prevented from the state of via crank mechanism around fixed eddy plate 320 axle center revolve rotary motion.
Fig. 2 is the block diagram being illustrated to the flowing of gas refrigerant and lubricating oil.
The gas refrigerant of low-pressure side from refrigerant circuit imported into suction chamber H1 via inhalation port P1, then, via
Refrigerant imports access L3 and guides to the space H5 for the peripheral part for being located at whirlpool disk unit 300.Then, the gas guided to space H5
Cryogen is inhaled into the discharge chambe H2 of whirlpool disk unit 300, and is changed according to the volume of discharge chambe H2 and compressed.It is compressed
H2 compressed gas refrigerant in room spues via discharge access L2 and check valve 326 to discharge room H3, then to oil eliminator
740 guidance.High pressure of the gas refrigerant of lubricating oil via discharge port P2 to refrigerant circuit is isolated by oil eliminator 740
Side spues.In addition, being throttled in the state that hole 840 limits in flow via back pressure by the lubricating oil that oil eliminator 740 is isolated
Supply passageway L1 is supplied to back pressure chamber H4.The lubricating oil supplied to back pressure chamber H4 is arranged via Back pressure control valve 860 to suction chamber H1
Out.
However, the lubricating oil of supply to back pressure chamber H4 are used as the back pressure that will be rotated whirlpool disk 340 and press towards fixed eddy plate 320,
And facilitate the lubrication positioned at the sliding position of inside of back pressure chamber H4 etc..Therefore, in the lubricating oil for being present in back pressure chamber H4
In may be mixed into the pollutant of the generation such as the abrasion because of sliding position.When being mixed into pollutant in lubricating oil, inside
Blocking will be generated by being placed in the filter to the back pressure Pm of the back pressure chamber H4 Back pressure control valve 860 being adjusted, thus back pressure
Control valve 860 will loss of function, and then can not suitably adjust back pressure.
Therefore, switching valve 900 is disposed in the midway of the back pressure supply passageway L1 positioned at the downstream side of throttle orifice 840, on
Switching valve 900 is stated to arrange the lubricating oil of back pressure chamber H4 to suction chamber H1 when the whirlpool disk unit 300 of Scrawl compressor 100 stops
Out.Specifically, switching valve 900 is according to the suction pressure Ps of suction chamber H1, the discharge pressure Pd and back pressure chamber of discharge room H3
The back pressure Pm of H4, in for making discharge room H3 and the back pressure chamber H4 first state being connected to and making that back pressure chamber H4 is connected to suction chamber H1
Automatically switch between two-state.Here, by whirlpool disk unit 300 work when switching valve 900 be switched to first state, thus
Back pressure can be supplied to back pressure chamber H4.In addition, by whirlpool disk unit 300 stop when switching valve 900 be switched to the second state, thus
The lubricating oil for being present in back pressure chamber H4 is discharged to suction chamber H1, reduces the absolute of the pollutant for importeding into Back pressure control valve 860
Amount, to inhibit the insufficiency of Back pressure control valve 860.
Switching valve 900 is disposed in the midway of back pressure supply passageway L1, therefore, back pressure supply passageway L1 is in throttle orifice 840
Downstream at bending at an acute angle, and the front end of back pressure supply passageway L1 towards back pressure chamber H4 be open.In addition, such as Fig. 3~Figure 10
It is shown, the position of the outer surface of supporting member 600, crooked position i.e. towards back pressure supply passageway L1 be formed with from there to
Large diameter hole 600B that crooked position extends, that diameter is bigger than back pressure supply passageway L1.Therefore, the innermost portion of large diameter hole 600B with
Circular valve seat 600C is formed between back pressure supply passageway L1.
Fig. 3 and Fig. 4 indicates the first embodiment of switching valve 900.
Switching valve 900 is contained in the large diameter hole 600B for being formed in supporting member 600.Specifically, switching valve 900 is configured to wrap
Include: the pedestal 920 of bottomed cylindrical, the pedestal 920 it is axial open at one end；Spool 940, which is arranged to can phase
Pedestal 920 is displaced along axial direction；Compression helical spring 960, the compression helical spring 960 are disposed in the bottom of pedestal 920
Between wall and spool 940；And O-ring 980.
Pedestal 920 is fixed on greatly by being pressed into such a way that the bottom wall of the pedestal 920 is by the closure of openings of large diameter hole 600B
Diameter hole 600B.In addition, the bottom wall of pedestal 920 central portion be formed with through-hole 920A, discharge room H3 and suction chamber H1 can be via
Through-hole 920A is connected to back pressure supply passageway L1.Spool 940 is one kind of so-called poppet, has round table-like umbrella portion 940A
Be configured to the columned valve stem 940B coaxial with umbrella portion 940A.The valve stem 940B of spool 940 with in pedestal 920
Pedestal 920 is inserted in the state between circumferential surface with circular gap.Moreover, by spool 940 relative to pedestal 920 in axis
It is displaced upwards, so as to contact, separate with the valve seat 600C of the innermost portion positioned at large diameter hole 600B.Compression helical spring
960 exert a force to spool 940 towards valve seat 600C.The week of O-ring 980 and the outer peripheral surface for the valve stem 940B for being formed in spool 940
Slot is chimeric, and when being switched to the first state for being connected to discharge room H3 with back pressure chamber H4, it is ensured that the inner peripheral surface and valve of pedestal 920
Air-tightness between the outer peripheral surface of bar portion 940B.
When in whirlpool, disk unit 300 works, need to supply the lubricating oil isolated by oil eliminator 740 to back pressure chamber H4,
Therefore, as shown in figure 3, leaving the spool 940 of switching valve 900 from the valve seat 600C of supporting member 600, and make discharge room H3 with
Back pressure chamber H4 connection, and the connection of discharge room H3 and back pressure chamber H4 and suction chamber H1 is truncated.
When in whirlpool, disk unit 300 works, the discharge pressure Pd and back pressure chamber of the suction pressure Ps of suction chamber H1, discharge room H3
Meet the relationship of suction pressure Ps < back pressure Pm < discharge pressure Pd between the back pressure Pm of H4.In this case, by compression spiral shell
Rotation spring 960 generate towards valve closing direction force, by suction pressure Ps generate towards the power in valve closing direction, by from throttling
The power towards valve opening position that the back pressure that hole 840 supplies generates acts on spool 940.Therefore, by considering Scrawl compressor
100 working characteristics suitably to determine the spring constant of compression helical spring 960 and the suction pressure of natural length, spool 940
The compression area etc. of Ps and the back pressure supplied from throttle orifice 840, so as to cut switching valve 900 when whirlpool disk unit 300 works
It is changed to the first state for being connected to discharge room H3 with back pressure chamber H4.
On the other hand, when whirlpool disk unit 300 stops, the lubricating oil that will be present in back pressure chamber H4 is discharged to suction chamber H1,
The pollutant being mixed into lubricating oil will not imported into Back pressure control valve 860.Therefore, as shown in figure 4, making switching valve 900
Spool 940 is abutted with the valve seat 600C of supporting member 600, and the connection of discharge room H3 Yu back pressure chamber H4 is truncated, and make back pressure
Room H4 is connected to suction chamber H1.
When in whirlpool, disk unit 300 stops, the discharge pressure Pd and back pressure chamber of the suction pressure Ps of suction chamber H1, discharge room H3
Meet the relationship of back pressure Pm=discharge pressure Pd=suction pressure Ps between the back pressure Pm of H4.In this case, it is produced by pressure
Raw power is balanced, only acts on spool 940 by the force towards valve closing direction that compression helical spring 960 generates.Therefore, pass through
Consider that the working characteristics of Scrawl compressor 100 suitably to determine the spring constant and natural length of compression helical spring 960, from
And switching valve 900 can be switched to the second state for being connected to back pressure chamber H4 with suction chamber H1 when whirlpool disk unit 300 stops.
When in whirlpool, disk unit 300 stops, being mixed into the pollutant being present in the lubricating oil of back pressure chamber H4 by gravity and
It precipitates downward.Therefore, by the position being configured at switching valve 900 below the vertical of back pressure chamber H4, so as to easily will
The pollutant and lubricating oil for being deposited in the lower section of back pressure chamber H4 are discharged to suction chamber H1 together.Therefore, remain on back pressure chamber H4's
The absolute magnitude of pollutant is reduced, for example, pollutant is not easy to imported into Back pressure control valve when restarting whirlpool disk unit 300
860, the filter for being built in the Back pressure control valve 860 is not likely to produce blocking.In addition, above-mentioned technical idea also can apply to it is following
The second embodiment of the switching valve 900 of explanation~third embodiment.
Fig. 5 and Fig. 6 indicates the second embodiment of switching valve 900.In addition, in the explanation of second embodiment, in order to
It prevents from obscuring with the switching valve 900 of first embodiment, referred to as switching valve 1000.In addition, the switching about second embodiment
Valve 1000 is illustrated to simplify for structure identical with the switching valve 900 of first embodiment in order to avoid repeated explanation.
If necessary, it can refer to the explanation of first embodiment.
Switching valve 1000 is contained in the large diameter hole 600B for being formed in supporting member 600.Specifically, switching valve 1000 is constituted
For the pedestal 1020 for including: bottomed cylindrical, the pedestal 1020 it is axial open at one end；Spool 1040, the spool 1040 are matched
It is set as to be displaced relative to pedestal 1020 along axial direction；Compression helical spring 1060, the compression helical spring 1060 are disposed in
Between the bottom wall and spool 1040 of pedestal 1020；And O-ring 1080.
Spool 1040 is different from the first embodiment, such as the ease of manufacture and diametrically with far from supporting member
600 valve seat 600C and reduce in two stages with the level cylindric.Moreover, the front end face energy of the large-diameter portion of spool 1040
It contacts, separate with valve seat 600C.In addition, about other effects and effect, it is identical with first embodiment, therefore, omits its and say
It is bright.
Fig. 7 and third embodiment Fig. 8 shows switching valve 900.In addition, in the explanation of third embodiment, in order to
It prevents from obscuring with the switching valve 1000 of the switching valve 900 of first embodiment and second embodiment, referred to as switching valve 1100.This
Outside, about the switching valve 1100 of third embodiment, for structure identical with the switching valve 900 of first embodiment, in order to
Repeated explanation is avoided, is illustrated to simplify.If necessary, it can refer to the explanation of first embodiment.
Switching valve 1100 is contained in the large diameter hole 600B for being formed in supporting member 600.Specifically, switching valve 1100 is constituted
For the pedestal 1120 for including: bottomed cylindrical, the pedestal 1120 it is axial open at one end；Columned spool 1140, the valve
Core 1140 is arranged to be displaced relative to pedestal 1120 along axial direction；Compression helical spring 1160, the compression helical spring
1160 are disposed between the bottom wall of pedestal 1120 and spool 1140；And O-ring 1180.
When in whirlpool, disk unit 300 works, need to supply the lubricating oil isolated by oil eliminator 740 to back pressure chamber H4,
Therefore, as shown in fig. 7, leaving the spool 1140 of switching valve 1100 from the valve seat 600C of supporting member 600, and make discharge room H3
It is connected to back pressure chamber H4, while the connection of discharge room H3 and back pressure chamber H4 and suction chamber H1 is truncated.
When in whirlpool, disk unit 300 works, the discharge pressure Pd and back pressure chamber of the suction pressure Ps of suction chamber H1, discharge room H3
Meet the relationship of suction pressure Ps < back pressure Pm < discharge pressure Pd between the back pressure Pm of H4.In this case, by compression spiral shell
The power towards valve closing direction generated towards the force in valve closing direction, by suction pressure Ps that rotation spring 1160 generates, You Congjie
The power towards valve opening position that the back pressure that discharge orifice 840 supplies generates acts on spool 1140.Therefore, by considering Scrawl compression
The working characteristics of machine 100 suitably to determine the sucking of the spring constant and natural length, spool 1140 of compression helical spring 1160
The compression area etc. of pressure Ps and the back pressure supplied from throttle orifice 840, so as to when whirlpool disk unit 300 works by switching valve
1100 are switched to the first state for being connected to discharge room H3 with back pressure chamber H4.
On the other hand, when whirlpool disk unit 300 stops, the lubricating oil that will be present in back pressure chamber H4 is discharged to suction chamber H1,
And Back pressure control valve 860 will not be imported by being mixed into the pollutant in lubricating oil.Therefore, as shown in figure 8, making switching valve
1100 spool 1140 is abutted with the valve seat 600C of supporting member 600, and the connection of discharge room H3 Yu back pressure chamber H4 is truncated, and
It is connected to back pressure chamber H4 with suction chamber H1.
When in whirlpool, disk unit 300 stops, the discharge pressure Pd and back pressure chamber of the suction pressure Ps of suction chamber H1, discharge room H3
Meet the relationship of back pressure Pm=discharge pressure Pd=suction pressure Ps between the back pressure Pm of H4.In this case, it is produced by pressure
Raw power is balanced, only acts on spool 1140 by the force towards valve closing direction that compression helical spring 1160 generates.Therefore, lead to
Cross the spring constant and length naturally for considering that the working characteristics of Scrawl compressor 100 suitably to determine compression helical spring 1160
Degree, so as to which switching valve 1100 is switched to be connected to back pressure chamber H4 with suction chamber H1 second when whirlpool disk unit 300 stops
State.
About the switching valve 900 of first embodiment and the switching valve 1000 of second embodiment, such as Fig. 9 and Figure 10 institute
Show, can be formed in the front end face of spool 940,1040, i.e. opposite with back pressure supply passageway L1 position towards inside it, for example
The recess portion 940C and 1040A of spherical shape.In this way, can stop to flow through the lubricating oil after throttle orifice 840, can increase by discharge pressure
The power towards valve opening position that Pd is generated.
Embodiment for carrying out the present invention is illustrated above, but the present invention is not limited by above embodiment
System can carry out various modifications and variation based on technical idea as following an examples enumerated.
Scrawl compressor 100 can also be from the external driving force for applying drive shaft 420.In addition, switching valve 900,1000
It is not limited to be disposed in positioned at the back pressure supply passageway L1 in the downstream of throttle orifice 840 positioned at throttle orifice 840 with 1100
Upstream back pressure supply passageway L1.Moreover, switching valve 900,1000 and 1100 is not limited to when whirlpool disk unit 300 stops
The structure for being connected to back pressure chamber H4 with suction chamber H1, such as back pressure chamber H4 can also be made and be located at the periphery of whirlpool disk unit 300
Space H5 connection.
(symbol description)
100 Scrawl compressors；
300 vortex elements；
320 fixed eddy plates；
340 rotation whirlpool disks；
900 switching valves；
1000 switching valves；
1100 switching valves；
H1 suction chamber；
H3 discharge room；
H4 back pressure chamber；
L1 back pressure supply passageway (communication paths).
Claims (5)
1. a kind of Scrawl compressor characterized by comprising
Whirlpool disk unit, the whirlpool disk unit have fixed eddy plate and rotation whirlpool disk；
Discharge room, the discharge room by the fluid after the whirlpool disk cell compression for being spued；
Back pressure chamber, the back pressure chamber make to play a role the rotation whirlpool disk towards the back pressure that the fixed eddy plate presses；And
Switching valve, the switching valve are disposed in the midway for the communication paths for being connected to the discharge room with the back pressure chamber, and root
In the first state for being connected to the discharge room with the back pressure chamber and make the back pressure according to the working condition of the whirlpool disk unit
Switch between room and external the second state being connected to of the back pressure chamber.
2. Scrawl compressor as described in claim 1, which is characterized in that
The switching valve is switched to the first state in the whirlpool disk cell operation, switches when the whirlpool disk unit stops
For second state.
3. Scrawl compressor as claimed in claim 1 or 2, which is characterized in that
The outside of the back pressure chamber is the suction chamber for the sucking of fluid from outside equipment.
4. Scrawl compressor as claimed in claim 3, which is characterized in that
The switching valve switched according to the pressure of the discharge room, the back pressure chamber and the suction chamber first state and
Second state.
5. Scrawl compressor according to any one of claims 1 to 4, which is characterized in that
The switching valve is located at below the vertical of the back pressure chamber.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-055566 | 2017-03-22 | ||
| JP2017055566A JP2018159285A (en) | 2017-03-22 | 2017-03-22 | Scroll type compressor |
| PCT/JP2018/004815 WO2018173543A1 (en) | 2017-03-22 | 2018-02-13 | Scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110462217A true CN110462217A (en) | 2019-11-15 |
Family
ID=63585367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880019772.6A Withdrawn CN110462217A (en) | 2017-03-22 | 2018-02-13 | Scrawl compressor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210115917A1 (en) |
| JP (1) | JP2018159285A (en) |
| CN (1) | CN110462217A (en) |
| DE (1) | DE112018001526T5 (en) |
| WO (1) | WO2018173543A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022052828A (en) | 2020-09-24 | 2022-04-05 | サンデン・オートモーティブコンポーネント株式会社 | Scroll type compressor |
| DE102020129864A1 (en) * | 2020-11-12 | 2022-05-12 | Hanon Systems | Device for compressing a gaseous fluid |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176489A (en) * | 1982-04-09 | 1983-10-15 | Hitachi Ltd | Motor compressor |
| JPH03172591A (en) * | 1989-11-29 | 1991-07-25 | Hitachi Ltd | Scroll compressor |
| JPH0350308Y2 (en) * | 1986-01-13 | 1991-10-28 | ||
| JPH06167285A (en) * | 1992-12-01 | 1994-06-14 | Hitachi Ltd | Scroll compressor |
| JPH08296570A (en) * | 1995-04-25 | 1996-11-12 | Hitachi Ltd | Scroll type liquid refrigerant pump |
| JP2000314382A (en) * | 1999-05-06 | 2000-11-14 | Hitachi Ltd | Scroll compressor |
| JP2010096040A (en) * | 2008-10-15 | 2010-04-30 | Toyota Industries Corp | Scroll compressor |
| JP2012207606A (en) * | 2011-03-30 | 2012-10-25 | Hitachi Appliances Inc | Scroll compressor |
| JP2014070588A (en) * | 2012-09-28 | 2014-04-21 | Daikin Ind Ltd | Scroll compressor |
-
2017
- 2017-02-13 US US16/496,015 patent/US20210115917A1/en not_active Abandoned
- 2017-03-22 JP JP2017055566A patent/JP2018159285A/en active Pending
-
2018
- 2018-02-13 CN CN201880019772.6A patent/CN110462217A/en not_active Withdrawn
- 2018-02-13 WO PCT/JP2018/004815 patent/WO2018173543A1/en active Application Filing
- 2018-02-13 DE DE112018001526.2T patent/DE112018001526T5/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176489A (en) * | 1982-04-09 | 1983-10-15 | Hitachi Ltd | Motor compressor |
| JPH0350308Y2 (en) * | 1986-01-13 | 1991-10-28 | ||
| JPH03172591A (en) * | 1989-11-29 | 1991-07-25 | Hitachi Ltd | Scroll compressor |
| JPH06167285A (en) * | 1992-12-01 | 1994-06-14 | Hitachi Ltd | Scroll compressor |
| JPH08296570A (en) * | 1995-04-25 | 1996-11-12 | Hitachi Ltd | Scroll type liquid refrigerant pump |
| JP2000314382A (en) * | 1999-05-06 | 2000-11-14 | Hitachi Ltd | Scroll compressor |
| JP2010096040A (en) * | 2008-10-15 | 2010-04-30 | Toyota Industries Corp | Scroll compressor |
| JP2012207606A (en) * | 2011-03-30 | 2012-10-25 | Hitachi Appliances Inc | Scroll compressor |
| JP2014070588A (en) * | 2012-09-28 | 2014-04-21 | Daikin Ind Ltd | Scroll compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| US20210115917A1 (en) | 2021-04-22 |
| DE112018001526T5 (en) | 2019-12-05 |
| WO2018173543A1 (en) | 2018-09-27 |
| JP2018159285A (en) | 2018-10-11 |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191115 |