Detailed description of the invention
Then, come the most referring to the drawings embodiments of the present invention are illustrated.
Fig. 1 is that the cross-sectional of the compression mechanical part of the screw compressor corresponding with the I-I section of Fig. 2 regards
Figure.Fig. 2 is the longitudinal section of the screw compressor that embodiments of the present invention relate to.
As shown in Figures 1 and 2, screw compressor 1 of the present embodiment is characterised by,
Convolution whirlpool dish 6 carry out circling round relative to fixed eddy plate 5 and in discharge chambe 11 to working fluid (
In present embodiment, it is assumed that for containing ether system or the R32 cold-producing medium of ester system refrigerating machine oil) it is compressed
Time, the suction inlet 5a configuration of at least one relief valve device 15 Workflow-oriented body all the time.Here,
After the overall structure of screw compressor 1 is illustrated, relief valve device 15 and relief valve are filled
Put the configuration of 15 to illustrate.
(overall structure of screw compressor)
As in figure 2 it is shown, screw compressor 1 is made up of the hermetic type screw compressor of high pressure chest mode,
Fortune in the broad range used in a part for the kind of refrigeration cycle as room air conditioner etc.
Use under the conditions of Zhuaning.Screw compressor 1 possesses: have convolution whirlpool dish 6 and the compression of fixed eddy plate 5
Mechanism part 3;Drive the motor 4 of this compression mechanical part 3;It is accommodated with compression mechanical part 3 and electronic
The closed container 2 of the tubular lengthwise of machine 4.It should be noted that compression mechanical part 3 is arranged in airtight
Top in container 2, motor 4 is arranged in the bottom in closed container 2.Further, in airtight appearance
Bottom in device 2 is stored with refrigerating machine oil 13.
Closed container 2 is by welding lid chamber 2b and bottom cavity 2c up and down and structure at cylindric housing 2a
Become.Lid chamber 2b is provided with suction line 2d.Symbol 8 represents check valve.Side at housing 2a
Face is provided with discharge pipe 2e.Inner Constitution ejection pressure chamber 2f of closed container 2.
Suction line 2d is used for from the upper surface part of closed container 2 this closed container 2 through will refrigeration
Agent gas guides to the suction side of compression mechanical part 3.Discharge pipe 2e with the spray in closed container 2
The mode going out the connection of pressure chamber 2f is connected to the side of closed container 2.
Compression mechanical part 3 possesses: erect the fixed eddy plate roll bending being provided with scroll on platen 5d
The fixed eddy plate 5 of 5c;On platen 6d erect be provided with scroll convolution whirlpool coil plate 6a return
Vortex dish 6;Integrated with fixed eddy plate 5 by fastening member etc. and convolution whirlpool dish 6 is supported
Framework 9.
It should be noted that in fig. 2, symbol 11 expression is formed at fixed eddy plate roll bending 5c and returns
Vortex coil between plate 6a, at the discharge chambe of working fluid of rear detailed description, symbol 5e represents
Make the working fluid after being compressed by discharge chambe 11 to the ejiction opening of ejection pressure chamber 2f ejection.
As it is shown in figure 1, be provided with on fixed eddy plate 5 and suction inlet 5a and ejection pressure chamber 2f (reference
The scroll gas passage 5b (the working fluid path of scroll) Fig. 2) communicated, this scroll gas
Body path 5b becomes scroll by fixed eddy plate roll bending 5c.And shape opposed with this fixed eddy plate 5
Become the most discoid described convolution whirlpool dish 6 (with reference to Fig. 2) to be configured to circle round freely.As above institute
State, the convolution whirlpool of the upper surface being arranged on convolution whirlpool dish 6 coil plate 6a with fixed eddy plate roll bending 5c
The mode of engagement configures.
Coil between plate 6a at fixed eddy plate roll bending 5c and convolution whirlpool, roll up according to relative to fixed eddy plate
The convolution whirlpool that plate 5c carries out circling round is coiled the position of plate 6a and is formed discharge chambe 11.
Further, the discharge chambe 11 in present embodiment be formed at convolution whirlpool coil plate 6a outer circumferential side and
Inner circumferential side.
Fig. 3 (a) is to represent in the outer circumferential side of roll bending of convolution whirlpool dish and formation between fixed eddy plate
The schematic diagram of discharge chambe, Fig. 3 (b) be represent convolution whirlpool dish roll bending inner circumferential side and with solid
The schematic diagram of the discharge chambe formed between static vortex disk.
Discharge chambe 11 in present embodiment coils plate 6a's in convolution whirlpool as shown in Fig. 3 (a)
Outer circumferential side and formation between fixed eddy plate 5, and, in convolution whirlpool as shown in Fig. 3 (b)
Coil the inner circumferential side of plate 6a and formed between fixed eddy plate 5.
It should be noted that the center side at fixed eddy plate 5 forms ejiction opening 5e, described suction inlet
5a is formed at the outer circumferential side of fixed eddy plate 5.
It addition, in the present embodiment, coil, in convolution whirlpool, the discharge chambe that the outer circumferential side of plate 6a is formed
Closing of the working fluid of 11 (with reference to Fig. 3 (a)) coils the inner circumferential side of plate 6a into volumetric ratio in convolution whirlpool
Closing into volume of the working fluid of the discharge chambe 11 (with reference to Fig. 3 (b)) formed is big.
According to such screw compressor 1 (with reference to Fig. 2) of the present embodiment, it is possible to will be from suction
The working fluid that entrance 5a sucks period efficiency till spraying to ejiction opening 5e is pressed well
Contracting.
Again returning to Fig. 2, fixed eddy plate 5 is fixing on the frame 9 by bolt B 1, framework 9
Outer circumferential side is fixed by welding on the internal face of closed container 2.Further, fixed eddy plate 5 sets
There is the relief valve device 15 in rear detailed description.Possess on the frame 9 and bent axle 7 is supported as rotating from
As base bearing 9a.Lower face side at convolution whirlpool dish 6 is linked with the eccentric part 7b of bent axle 7.
It is configured with European ring 12, European ring 12 between lower face side and the framework 9 of convolution whirlpool dish 6
It is installed in the groove that the lower face side at convolution whirlpool dish 6 formed and the groove formed on the frame 9.It addition,
This European ring 12 plays the eccentric rotary of the eccentric part 7b bearing bent axle 7 and makes convolution whirlpool dish 6 not
The effect of revolution motion is carried out in the case of rotation.
Motor 4 possesses fixture 4a and revolving part 4b.Fixture 4a is fastened to close by press-in etc.
Close on container 2.Revolving part 4b is configured to rotate in fixture 4a.Motor 4 is via solid
The bent axle 7 that is scheduled on revolving part 4b and make convolution whirlpool dish 6 carry out circumnutation.
Bent axle 7 possesses main shaft part 7a and described eccentric part 7b, and by the master arranged on the frame 9
Bearing 9a and lower bearing 17 support.Eccentric part 7b eccentric relative to main shaft part 7a of bent axle 7 and one
Body ground is formed, and chimeric with the convolution bearing (omitting diagram) on the back side being arranged on convolution whirlpool dish 6.
Bent axle 7 is driven by the driving of motor 4, and eccentric part 7b is relative to the main shaft part of bent axle 7
7a carries out eccentric rotational motion, thus is driven back to vortex dish 6.It addition, bent axle 7 is provided with therein
The confession that refrigerating machine oil 13 is guided to base bearing 9a, lower bearing 17 and convolution bearing (omitting diagram)
Oil path 7c, and the axle head in motor 4 side be provided with absorption refrigerating machine oil 13 and by it to fuel feeding
The fuel feed pump 7d that path 7c guides.
Be formed between rear side and the framework 9 of convolution whirlpool dish 6 pressure becoming suction line 2d with
The middle pressure chamber 14 of the intermediate pressure of the pressure of ejection pressure chamber 2f.This middle pressure chamber 14 is formed at close
Close the refrigerating machine oil 13 in container 2 to the midway, path that the sliding part of compression mechanical part 3 supplies.Suitable
Band is said, be stored in closed container 2 bottom refrigerating machine oil 13 by this middle pressure chamber 14 with
Ejection pressure chamber 2f pressure differential and via bent axle 7 central part formed fuel feeding path 7c to main shaft
Hold the supplies such as 9a.
In such screw compressor 1, by make motor 4 revolving part 4b rotate and via
Bent axle 7 makes convolution whirlpool dish 6 carry out circumnutation.Thus, the working fluid sucked from suction line 2d
Via check valve 8 and suction inlet 5a (with reference to Fig. 1) by scroll gas passage 5b (ginseng
According to Fig. 1) send into.In the 5b of this scroll gas passage, as it is shown in figure 1, at fixed eddy plate roll bending
5c and convolution whirlpool are coiled and are formed described discharge chambe 11 between plate 6a.
By making convolution whirlpool dish 6 carry out revolution fortune relative to fixed eddy plate 5 in the case of not rotation
Dynamic, thus working fluid is sucked to the suction chamber 10 shown in Fig. 1 from suction inlet 5a.On the other hand,
Discharge chambe 11 shown in Fig. 1 is coiled the revolution motion of plate 6a along with this convolution whirlpool and is leaned on ectocentral spray
Outlet 5e.
Discharge chambe 11 more reduces closer to the ejiction opening 5e of central authorities, the volume of discharge chambe 11.That is, pressure
The working fluid of contracting room 11 is compressed.Further, the mobile position to the ejiction opening 5e towards central authorities
Discharge chambe 11 by the working fluid after compression via ejiction opening 5e ejection pressure in closed container 2
Room 2f (with reference to Fig. 2) ejection.These working fluids sprayed are by framework 9 (with reference to Fig. 2)
The path that arranges of periphery and be directed downward, after cooling motor 4 (with reference to Fig. 2), from
Discharge pipe 2e (with reference to Fig. 2) send in the kind of refrigeration cycle of the outside of closed container 2 (with reference to Fig. 2)
Go out.
On the other hand, the suction chamber 10 of the scroll gas flow path 5b shown in Fig. 1 is by convolution whirlpool dish
The revolution motion of roll bending 6a sucks working fluid, forms discharge chambe 11 afterwards and is closed by working fluid
Enter and coil between plate 6a to fixed eddy plate roll bending 5c and convolution whirlpool, and, close into discharge chambe 11
In working fluid as described above by compression to central authorities ejiction opening 5e spray.
It should be noted that in FIG, symbol 15a represents relief valve device 15 (with reference to Fig. 2)
Release aperture described later.
(relief valve device)
Then, relief valve device 15 is illustrated.Fig. 4 is the fixing of the screw compressor of Fig. 2
The top view of whirlpool dish.
As shown in Figure 4, relief valve device 15 be formed on compression mechanical part 3 (with reference to Fig. 2)
Multiple discharge chambes 11 (with reference to Fig. 1) are corresponding and are arranged on multiple positions of fixed eddy plate 5.So
Relief valve device 15 for the pressure in discharge chambe 11 more than set pressure big time from discharge chambe 11
To ejection pressure chamber 2f (with reference to Fig. 2) ejection working fluid.
It should be noted that in the diagram, symbol 5e represents that ejiction opening, symbol 16 represent described later
Baffle plate.
Referring next to Fig. 5 be the sectional view of the relief valve device corresponding with the V-V section of Fig. 4,
A () is the sectional view of the relief valve device representing closed mode, (b) is to represent releasing of open mode
Put the sectional view of valve gear.
As shown in Fig. 5 (a) and (b), relief valve device 15 possess be arranged in release stream 15i in
Relief valve 15d and valve pressing body 15h, be arranged in the baffle plate 16 of the upper surface of fixed eddy plate 5.
Release stream 15i is with by scroll gas passage 5b (with reference to Fig. 1) and ejection pressure chamber 2f (ginseng
According to Fig. 2) mode that connects is formed on the platen 5d of fixed eddy plate 5.Stream 15i is by releasing in this release
Discharge hole 15a and release valve chamber 15c is constituted.
Release aperture 15a is to scroll gas passage 5b (with reference to Fig. 1) opening.The appearance of release aperture 15a
The one of the long-pending volume being formed in the 5b of scroll gas passage the discharge chambe 11 (with reference to Fig. 1) formed
Part, and the dead volume that the reflation loss becoming the remaining gas with compression travel is accompanied, because of
The volume (internal diameter size or length dimension) of this preferred release aperture 15a is minimum.
Release valve chamber 15c includes: the guiding elements 15f of valve pressing body 15h described later mainly configures
Large-diameter portion 15j;Formed less than this large-diameter portion 15j diameter and bigger, towards this than release aperture 15a diameter
Release aperture 15a and the minor diameter part 15k that connects with this release aperture 15a.
It should be noted that large-diameter portion 15j connects via tapered portion 15m with minor diameter part 15k.
It is formed by the platform heaved in the form of a ring around release aperture 15a in the bottom of this minor diameter part 15k
The valve seat 15b that rank portion is constituted.
This valve seat 15b is configured with relief valve 15d in the way of inaccessible release aperture 15a.This release
Valve 15d is formed by discoid steel spring plate etc..
Valve pressing body 15h possesses guiding elements 15f and force application component 15e.
Guiding elements 15f mainly possesses: at the main part of the large-diameter portion 15j configuration of release valve chamber 15c;
From this main part, the minor diameter part 15k side to release valve chamber 15c is extended and installs for force application component 15e
Generally cylindrical installation portion.
The external diameter of the main part of guiding elements 15f is set such that and is accommodated in release valve chamber at main part
Between this main part and this large-diameter portion 15j, there is clearance C 1 during the large-diameter portion 15j of 15c.
It addition, the length of the above-below direction of main part is set to that the degree of depth than large-diameter portion 15j is slightly shorter.That is,
As described later, main part is configured under the effect of force application component 15e and baffle plate in large-diameter portion 15j
16 abut, and are formed with clearance C 2 between this main part and tapered portion 15m.
Such guiding elements 15f has multiple drain hole 15g stream as working fluid.
Force application component 15e in present embodiment is formed by helical spring, is formed adjacent at its two ends
The contiguity winder touched each other of winding.Further, in the contiguity winder of a side, intercalation has guiding
The installation portion of component 15f.It addition, the front end of the contiguity winder of the opposing party be arranged in valve seat 15b
On relief valve 15d upper surface abut.It should be noted that the relief valve 15d in present embodiment
It is not connected to the front end of the contiguity winder of the opposing party but it also may be configured to touch the front end of winder
The structure being connected with relief valve 15d.
According to the force application component 15e being made up of such helical spring, it is possible in the two of contiguity winder
The installation portion of the either end intercalation guiding elements 15f in end, therefore assembles easiness superior.It addition,
Owing to becoming close contiguity winder intercalation installation portion at winding internal, therefore force application component 15e relative to
The mounting stability of guiding elements 15f is superior.
As shown in Figure 4, the baffle plate 16 in present embodiment is to be arranged on fixing whirlpool by bolt B 2
Plate body on the upper surface of the platen 5d of dish 5.Baffle plate 16 is formed and makes relief valve device 15
Drain hole 15g towards ejection pressure chamber 2f (with reference to Fig. 2) opening 16a, make fixed eddy plate 5
Ejiction opening 5e is towards the opening 16b of ejection pressure chamber 2f (with reference to Fig. 2).
As shown in Fig. 5 (a), the edge of the opening 16a of baffle plate 16 with by force application component 15e upwards
The upper surface of the valve pressing body 15h in the release valve chamber 15c of side's force abuts.That is, baffle plate 16 exists
Valve pressing body 15h movement upward is limited in release valve chamber 15c.Thus, valve pressing body 15h
In release valve chamber 15c, it is maintained at the position of regulation, is arranged on the force on this valve pressing body 15h
Component 15e be set to relief valve 15d is pressed onto on valve seat 15b by pressure in prescribed limit.
Such baffle plate 16 such as can be manufactured by the stamping processing of steel plate.
In relief valve device 15, in the system enclosing screw compressor 1 of the present embodiment
When generally operating of SAPMAC method (such as room air conditioner etc.), as shown in Fig. 5 (a), release
Valve 15d is arranged on valve seat 15b in the way of inaccessible release aperture 15a, the force of valve pressing body 15h
Relief valve 15d is pressed towards valve seat 15b by component 15e with the active force (by pressure) of regulation.That is,
When generally operating, the working fluid of discharge chambe 11 compression as shown in Figure 1 is not via being released valve
Release aperture 15a that 15d (with reference to Fig. 5 (a)) is inaccessible, and via at fixed eddy plate 5 (with reference to Fig. 2)
The ejiction opening 5e (with reference to Fig. 2) being centrally formed to ejection pressure chamber 2f (with reference to Fig. 2) ejection.
On the other hand, the pressure in discharge chambe 11 (with reference to Fig. 1) becomes more than ejection pressure, enters
Specifically, the pressure in discharge chambe 11 becomes ratio and sets pressure (ejection pressure+release one step
The elasticity of the weight of valve 15d+force application component 15e presses pressure) big time, as shown in Fig. 5 (b), close
Relief valve 15d active force (by pressure) overcoming force application component 15e having filled in release aperture 15a etc. and
Lifted upward.As a result of which it is, the working fluid such as Fig. 5 (b) in discharge chambe 11 (with reference to Fig. 1)
Via release aperture 15a, release valve chamber 15c and opening 16a to ejection pressure as shown in hollow core arrow
Room 2f (with reference to Fig. 2) ejection.
Further, at the pressure of discharge chambe 11 (with reference to Fig. 1) to ejection pressure chamber 2f ejection working fluid
During less than described setting pressure, force application component 15e replys as shown in Fig. 5 (a), and relief valve
15d is the most inaccessible by release aperture 15a.
(configuration of relief valve device)
Then, to the position configuring relief valve device 15 on fixed eddy plate 5 in the present embodiment
Illustrate.
As it is shown in figure 1, relief valve device 15 (release aperture 15a) is along being formed with discharge chambe 11
Scroll gas passage 5b and be configured with multiple.If the brightest, scroll gas leads to
Road 5b with by fixed eddy plate 5 the ejiction opening 5e being centrally formed with than this ejiction opening 5e by fixing
The suction inlet 5a formed outside the radial direction of whirlpool dish 5 is in the scroll phase centered by ejiction opening 5e
Mode even extends, and relief valve device 15 (release aperture 15a) is along at suction inlet 5a and ejiction opening
The bearing of trend of scroll gas passage 5b that extends between 5e and be configured with multiple.
Relief valve device 15 (release aperture 15a) as described above, at least one relief valve device 15
(release aperture 15a) via scroll gas passage 5b all the time towards suction inlet 5a (with reference to Fig. 1)
Configuration.Further, in the present embodiment, in multiple relief valve devices 15 (release aperture 15a) extremely
A few suction inlet 5a configuration by scroll gas passage 5b.
Fig. 6 is the partial enlarged drawing in the VI portion of Fig. 1, is the movement that the roll bending than convolution whirlpool dish is described
The figure of the position of the relief valve device that scope is more formed by suction inlet.
As shown in Figure 6, relief valve device 15 (release aperture 15a) is when the whirlpool dish 6 that circles round circles round
Moving range L coiling plate 6a than this convolution whirlpool more configures by suction inlet 5a, and by fixed eddy plate
The interior lines 5f configuration of 5.
Here, relief valve device 15 (release aperture 15a) " is more joined by suction inlet 5a than moving range L
Put " mean that the convolution whirlpool of no matter movement in moving range L is coiled the position of plate 6a and how to be changed,
The opening of release aperture 15a at least some of via scroll gas passage 5b and suction inlet 5a all the time
Connection.In other words, as shown in Figure 6, a part for the opening of release aperture 15a can also be with mobile model
Enclose L overlapping.
It addition, configured by the interior lines 5f of fixed eddy plate 5 by relief valve device 15 (release aperture 15a),
The advantage thus with the area that can reduce baffle plate 16.
Further, in the relief valve device of multiple formation 15 (with reference to Fig. 1), by suction inlet 5a shape
The center (center of release aperture 15a under top view) of the relief valve device 15 (with reference to Fig. 6) become
It is positioned at when circling round moving range L at the place, end of its suction inlet 5a side than convolution whirlpool dish 6 more by suction
The position of entrance 5a.
Then, the action effect of screw compressor 1 of the present embodiment is illustrated.
In screw compressor 1 as above, in working fluid (the R32 system containing refrigerating machine oil
Cryogen) become generally operating of below setting pressure by the pressure in discharge chambe 11 during compression
Time, close release aperture 15a (with reference to Fig. 5 (a)) by relief valve 15d.Thus, working fluid
Will not be via relief valve device 15 to ejection pressure chamber 2f ejection when generally operating.
On the other hand, according to the operational situation of room air conditioner etc., at working fluid (containing system
The refrigerant gas of cold oil or liquid refrigerant) by the pressure in discharge chambe 11 during compression
When exceeding setting pressure (during overcompression operating), the pressure of discharge chambe 11 becomes than ejection pressure chamber 2f
Pressure high, under the effect of this pressure differential relief valve 15d from valve seat 15b leave and by release aperture 15a
Open (with reference to Fig. 5 (b)).The discharge chambe of release aperture 15a is have passed through because of opening of release aperture 15a
Working fluid in 11 flows towards the direction shown in the hollow arrow of Fig. 5 (b) and arrives ejection pressure
Room 2f.By such relief valve device 15, it is possible to prevent overcompression loss or fixed eddy plate roll bending
The damage of plate 6a is coiled in 5c and convolution whirlpool.
It addition, in screw compressor 1 (with reference to Fig. 2) of the present embodiment, in order to reduce
Environmental loads and use R32 cold-producing medium.Further, in this screw compressor 1, and R32 is employed
The existing screw compressor of cold-producing medium is compared, in order to ensure long-term reliability, being dried suction side
Degree is set to the relatively low temperature reducing ejection side.Thus, at substantial amounts of liquid refrigerant or refrigeration machine
In the case of oil was flowed in screw compressor 1 within suction line 2d (with reference to Fig. 2) short time,
In existing whirlpool plate compressor (for example, referring to patent document 3), exist and formed because of this hydraulic pressure
In suction chamber before discharge chambe, pressure exceedes the situation setting pressure.In contrast, according to this embodiment party
The whirlpool plate compressor 1 that formula relates to, as shown in Figure 6, is filled by the relief valve arranged by suction inlet 15a
Put 15 (release aperture 15a), it is possible to liquid refrigerant or refrigerating machine oil are sprayed to ejection pressure chamber 2f,
Therefore, it is possible to prevent because of be applied to fixed eddy plate roll bending 5c and convolution whirlpool coil the overload on plate 6a and
The damage of the compression mechanical part 3 caused.
It addition, according to screw compressor 1 of the present embodiment, (released by relief valve device 15
Discharge hole 15a), it is possible to liquid refrigerant or refrigerating machine oil are sprayed to ejection pressure chamber 2f, therefore can also
The circulation enough making the cold-producing medium of liquid condition or refrigerating machine oil is smooth and easy, prevents pipe or the damage of valve, thus
Improve the reliability of screw compressor 1.
Above embodiments of the present invention are illustrated, but the invention is not limited in described enforcement
Mode, can implement in every way.
Referring next to Fig. 7, Fig. 8 and Fig. 9 (a) and (b) be represent by suction inlet configure
The figure of other example of position of relief valve device.Figure 10 is the first deformation representing relief valve device
The longitudinal section of example.Figure 11 is the longitudinal section of the second variation representing relief valve device.
In said embodiment, by the relief valve device 15 (release aperture 15a) of suction inlet 5a configuration
Interior lines 5f by fixed eddy plate roll bending 5c configures, but in the present invention, as shown in Figure 7, it is also possible to
Outside line 5g by fixed eddy plate roll bending 5c configures.
According to such relief valve device 15 (release aperture 15a), make to become with the distance of suction inlet 5a
Bigger, it is possible to prevent the formation etc. in release stream 15i (with reference to Fig. 5 (a)) from adding fixed eddy plate in man-hour
The deformation of 5.It should be noted that in the figure 7, symbol 5f represents the interior lines of fixed eddy plate 5, symbol
Number L represents the moving range at its place, end when convolution whirlpool dish 6 circles round.
It addition, as shown in Figure 8, relief valve device 15 (release aperture 15a) can also be arranged in scrollwork
The width central authorities of shape gas passage 5b.It should be noted that in fig. 8, symbol 5a represents
Suction inlet, symbol 5g represents that the outside line of fixed eddy plate 5, symbol L represent when convolution whirlpool dish 6 circles round
The moving range at its place, end.According to this relief valve device 15 (release aperture 15a), due to release
Hole 15a is arranged in the width central authorities of scroll gas passage 5b, and therefore liquid refrigerant etc. hold
Easily flow to release aperture 15a, it is possible to via relief valve device 15 (release aperture 15a) by liquid system
Cryogens etc. are effectively discharged out.
It addition, in said embodiment, at least one relief valve device 15 is joined by suction inlet 5a
Put, but in the present invention, it is also possible to by least one relief valve device 15 via scroll gas flow path
5b and all the time towards suction inlet 5a configure.
Thus, as shown in Fig. 9 (a) and (b), it is also possible to be configured to, returning by suction inlet 5a
Vortex dish 6 part, inner circumferential side and the outer circumferential side of coiling plate 6a in convolution whirlpool form discharge chambe 11 respectively
(with reference to Fig. 3 (a) and (b)) in the range of, with at least one party's (release aperture 15a) all the time with suction
The mode of entrance 5a connection coils the inner circumferential side of plate 6a in convolution whirlpool and outer circumferential side is respectively configured relief valve
Device 15 (release aperture 15a).
It addition, in this case, the preferably periphery at suction inlet 5a arranges and digs portion 5h.Such
The portion 5h of digging is capable of when cold-producing medium etc. flows via relief valve device 15 (release aperture 15a)
Stream loss reduces.
It should be noted that in Fig. 9 (a) and (b), symbol 5 represents fixed eddy plate.
It addition, in said embodiment, baffle plate 16 is with the upper table with the platen 5d of fixed eddy plate 5
The mode that face abuts is installed, but the present invention is as shown in Figure 10, it is also possible to be configured to baffle plate 16 fixing
The upper surface of the platen 5d of whirlpool dish 5 separates gap configuration.
It should be noted that in Fig. 10, symbol 15a represents that release aperture, symbol 15c represent to be released
Putting valve chamber, symbol 15d represents that relief valve, symbol 15e represent that force application component, symbol 15f represent and draw
Leading component, symbol 15g represents that drain hole, symbol 15i represent release stream.According to such baffle plate
16, it is possible to shift motion during relief valve 15d opening and closing is guaranteed bigger.
It addition, in said embodiment, it is configured with in release stream 15i (with reference to Fig. 5 (a))
Relief valve 15d (with reference to Fig. 5 (a)), but the present invention is as shown in figure 11, it is also possible to discharge with obturation
The mode of the upper side opening of stream 15i arranges spring tabular at the upper surface of the platen 5d of fixed eddy plate 5
Relief valve 15d, using the one side of this relief valve 15d as the periphery of opening at release stream 15i
Fixing relief valve device 15.Further, in this relief valve device 15, it is possible to be arranged in release stream
Turn back the baffle plate 16 of such shape in the top of the upper side opening of road 15i.Such baffle plate 16 can be
Turned back by relief valve 15d and open the degree of turning back of release stream 15i limit this relief valve 15d.