JP2744909B2 - Scroll fluid machine and scroll fluid device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration
Scroll fluid machine used as medium compressorAnd
Scroll fluid device having crawl fluid machine and condenser
PlaceIt is about. [0002] BACKGROUND OF THE INVENTION In prior art scroll fluid machines
Is disclosed in FIG. 11 of Japanese Utility Model Publication No. 56-85087.
As shown in the figure, both scroll sections
Liquid refrigerant from the outlet side of the condenser into the compression space formed by the material
Is shown. [0003] SUMMARY OF THE INVENTION
In particular, when starting or just before stopping the compressor,
Is filled with the injected incompressible liquid refrigerant, which is compressed.
As it tries to shrink, it causes liquid compression and scroll wrap
There is a risk of causing a breakage accident. Or, by liquid compression
Pressure, the pressure inside the enclosed space rises abnormally and
Rotary scroll member is compressed away from fixed scroll member
Function does not work, causing problems such as poor startup.
Was. [0004] It is an object of the present invention to form both scroll members.
Liquid gas is injected into the enclosed space to cool the working gas.
As well as preventing liquid compression and abnormal pressure rise inside the enclosed space
Scroll fluid machine that can be stoppedAnd scroll
Fluid deviceIs to get [0005] Means for Solving the Problems To achieve the above object,
The first feature of the present invention is that a spiral wrap is directly attached to a head plate.
The standing fixed scroll member and the orbiting scroll member,
Engage the wraps inside each other and fix the scroll
The frame for fixing the material and the back of the end plate of the orbiting scroll member
A back pressure chamber constituted by:
The density formed by the roll member and the orbiting scroll member
The gas pressure derivation pores for guiding the gas during compression from the closed space are fixed.
End plate part of fixed scroll member or revolving scroll member
Do not rotate the rotating scroll member.
Swivel relative to the fixed scroll member
The roll member has a discharge opening at the center and an opening at the outer periphery
A gas inlet is provided, and gas is sucked from the gas inlet.
Move around the enclosed space formed by the roll member
To compress the gas and discharge the compressed gas from the discharge port
In the scroll fluid machine, an opening is provided in the closed space.
To cool the working gasRefrigerant injection poreThe solid
The end plate portion of the constant scroll member is providedRefrigerant
Injection poreOf the gas pressure derivation pores
Within one wrap of the wrap toward the beginning of the wrap
It has been placed. A second feature of the present invention is that the end plate has a spiral shape.
Scroll member and orbiting scroll for erecting a rectangular wrap
Engage the roll members with the wraps inside and
Fixed scroll part without rotating the scroll member
Orbital motion to the material, and the fixed scroll member
A suction port that opens to the outside and a suction port that opens to the outer
Gas is drawn in from the inlet and formed by both scroll members.
To reduce gas volume by moving
Scroll flow for compressing and discharging compressed gas from the discharge port
In the body machine, the working gas cooling opening in the closed space
For dismissalRefrigerant injection poreThe fixed scroll member end plate
Part, and providedRefrigerant injection poreThe opening of
The turning movement of the turning scroll member causes theBoth skulls
The space formed by the rule memberThrough the fixed scroll
-Scroll so that it intermittently communicates with the discharge port of the
1 along the outer circumference of the wrap from the end
Within the windingOne or more turns from the end of windingage
That is. In addition,Refrigerant injection poreIs scroll
One or more turns along the outer circumference of the wrap from the end
InsideAnd one or more turns from the end of windingOther
On the inner surface of the fixed scroll wrapAlongIn position,
The turning movement of the turning scroll member causes theBoth skulls
-Formed by a rule memberThe fixed scroll through space
-Intermittently communicate only with the discharge port of the, Fixed
Scroll wrap winding start fixed from the end
Within 1.5 turns along the inner circumference of the
A hole for injecting refrigerant at one or more turns from the partI will provide
In other words, for both symmetrically formed enclosed spaces
The refrigerant can be injected almost evenly, which is more effective
It is. [0007]The third feature of the present invention is that a spiral plate is provided on the head plate.
Fixed scroll member and upright scroll
Engage the components with the wraps inside each other and secure
The frame for fixing the roll member and the orbiting scroll member
A back pressure chamber configured with a back surface of the head plate, and the back pressure chamber
Formed by fixed scroll member and orbiting scroll member
For deriving gas pressure to guide gas during compression from enclosed space
Fix the pores on the end plate of the scroll member or swivel scroll
-Provided on the end plate part of the scroll member, and rotate the rotating scroll member
Swiveling motion with respect to the fixed scroll member without
The fixed scroll member has a discharge port opening at the center and an outer periphery
A suction port is provided in the opening, and gas is sucked from the suction port.
To the center of the enclosed space formed by both scroll members.
To reduce the volume and compress the gas.
Scroll fluid machine that discharges , The scroll flow
Scroll with a condenser connected to the discharge side of the body machine
In the fluid device, the opening is provided in the closed space.
Penetrate the end plate portion of the fixed scroll member, and
From the position of the pore for deriving pressure to the wrap winding start side
For cooling working gas provided within one wrap
And the refrigerant condensed in the condenser
To have a refrigerant injection pipe leading to the refrigerant injection pore
is there. [0008]A fourth feature of the present invention is that a spiral plate is provided on the head plate.
Fixed scroll member and upright scroll
Engage the components with the wraps inside each other and
The fixed scroll member can be used without rotating the roll member.
To open the center of the fixed scroll member.
And a suction port that opens at the outer periphery
Gas from the two scroll members
Moving around the closed space to reduce the volume and compress the gas,
Scroll fluid machine for discharging compressed gas from the discharge port
And a condenser connected to the discharge side of the scroll fluid machine
A scroll fluid device having a closed space.
End plate portion of the fixed scroll member so as to open in the space
Through, and start wrapping the scroll wrap and wrap from the end
Within one turn along the outer peripheral surface of
Peripheral surface of fixed scroll wrap at one or more turns from
A coolant injection pore for working gas cooling provided near,
The refrigerant condensed in the condenser is guided to the refrigerant injection holes.
Another object is to provide a refrigerant injection pipe. In addition, refrigerant injection
The pores for the scroll wrap start from the end of the wrap
Within one turn along the outer peripheral surface and one turn from the end of winding
Besides the fixed scroll wrap
Also near the peripheral surface, due to the turning motion of the turning scroll member.
Through the space formed by the scroll members.
Only intermittently communicates with the discharge port of the fixed scroll member
From the beginning of the fixed scroll wrap winding
Within 1.5 turns along the inner circumference of the constant scroll wrap
And for injecting refrigerant to one or more turns from the end of winding
By providing pores, it is possible to form a symmetrical closed space.
The refrigerant can be injected almost equally between both
Is more effective. According to the above-described present invention, the following operations are provided.
You. (1) For cooling working gasRefrigerant injection poreof
ApertureToWrapping the wrap from the position of the gas pressure deriving pores
It is provided at a position within one wrap of the wrap toward the beginning
In, the pores for refrigerant injection and the pores for deriving gas pressure are swirled.
During one rotation of the scroll through the enclosed spaceat leastOnce
Can communicateYou.For this reason, when starting or stopping the compressor
The injected incompressible liquid refrigerantSealed sky
Abundant in the spaceEven if you have, in this enclosed space
The liquid refrigerant is used for deriving gas pressure during one revolution of the swirling scroll.
When communicating with the back pressure chamber through this gas pressure derivation pore
This result,Abnormal pressure in liquid compression or enclosed space
Prevent riseOneSealed space formed by both scroll members
The working gas can be cooled by injecting a liquid refrigerant between them.
Wear. (2)Refrigerant injection poreOpeningTo, Skull
-From the beginning of the wrap, along the outer circumference of the wrap
Within one turn andOuter end of wrap from end of winding
One or more turns along the surfaceOf fixed scroll wrap
Outer surfacenearIn the one provided in the
AndThrough the space formed by both scroll members
Can communicate once during one rotation of the turning scroll
You.For this reason, when the compressor is started or just before the stop, etc.
Incompressible liquid refrigerantExtensive presence in enclosed spacedo it
Liquid refrigerant in this enclosed space, even if
Communication with the discharge port during one rotation of theWhenDischarged into this outlet
AndSoAs a result, liquid compression and abnormal pressure rise inside the enclosed space are prevented.
StopOneLiquid cooling in the closed space formed by both scroll members
The working gas can be cooled by injecting a medium. [0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 shows the fixed scroll side exposed to the atmosphere.
An open-type horizontal slide with the crankshaft arranged laterally
1 shows a refrigeration apparatus using a crawl compressor. Fixed scroll member 101 and orbiting scroll
The locking members 105 engage each other with the wrap portions facing inward.
In addition, the orbiting scroll member 105 includes a fixed scroll portion.
Material 101 and a flange for fixing the fixed scroll member 101.
Orbiting scroll section
A concave portion of the frame 106 is provided on the back of the mirror plate 105a of the material 105.
A back pressure chamber 123 is formed at the place. The rotating shaft 107 supported on the frame 106
Has an eccentric shaft 107a formed at the tip thereof.
Are engaged with the boss 105c of the orbiting scroll member.
Reference numeral 108 denotes an Oldham mechanism, and the orbiting scroll member 105
Is an eccentric rotation of the eccentric shaft 107a.
Turning to the fixed scroll member 101 via the structure 108
Do exercise. By the above-mentioned revolving motion, both scroll members can be used.
The enclosed space 121 formed gradually moves to the center and
Decrease. The gas flows from the suction port 103 on the outer periphery to the suction chamber 1
22 and is discharged from the discharge port 102 at the center. The back pressure chamber 123 and the closed space 121 in the compression process
Are the fine holes 124a, 124b formed in the end plate 101a,
It is connected via a pipe 125, and the compression
Intermediate pressure is introduced to obtain the axial pressing force.
You. A discharge pipe 131 is connected to the discharge port 102.
The other end is connected to the condenser 182 and the outlet of the condenser 182
The piping 183 connected to the side evaporates via the expansion valve 184
The evaporator outlet is connected to a suction pipe 164.
Is connected to the suction port 103. Also, from the inflow side pipe of the expansion valve 184,Condensation
For introducing a part of the liquid refrigerant condensed by the heater 182
tube(Less thanInjection piping(Abbreviated as 135).
35 has a pressure reducer 137 interposed, and the other end is a fixed scroll
Drilled in the end plate 101aRefrigerant injection pore(Less thanInjection
For pores139a, 139b, closed air
Communicated between them. Solid arrows in the figure indicate the flow of refrigerant gas
The dashed arrow indicates the flow direction of the liquid refrigerant. In the case of a compressor for refrigeration and air conditioning, the discharge pressure P_d
And suction pressure P_s, Ie, the operating pressure ratio P_d/ P_sIs 7 ~
It may be abnormally large, such as 10. In this case,
The discharge gas temperature of the medium is as high as about 120 ° C to 150 ° C.
The pressure of the liquid refrigerant was reduced through the injection pipe 135 shown in FIG.
Then, the working gas is cooled by injecting into the closed space. However, if the compressor is stopped,
In operation, a large amount of liquid refrigerant is supplied through the injection pipe 135.
The liquid refrigerant flows into the closed space 121,
Collected in 1. Restart the compressor in this state,
As described above, the liquid refrigerant in the closed space is compressed. For this reason, this embodiment is different from the above-described embodiment.Injection pore
139a and 139b and gas pressure deriving fine holes 124a and 124
4b in the positional relationship described below,
The liquid refrigerant injected into the closed space is passed through the back pressure chamber 123 to another
Escape to pressure chamber (closed space) to remove or reduce liquid compression
I do. FIG. 2 shows that both scroll members are engaged with each other.
It is a cross-sectional view showing a state. The gas pressure deriving pores 12
4a, 124bInjection pore139a and 139b are both
Sealed spaces 121a, 121 formed by scroll members
b.
ing. Each of the above pores was along the side wall of the scroll wrap
It is provided on the end plate. That is,Injection pore139a and 139b
Wrap winding start part from the pressure pressure deriving fine holes 124a and 124b
(At the center of the wrap)
For example, as shown in the figure, the fine holes 139a, 139b and 12
4a and 124b are intermittent, that is, of the orbiting scroll member.
Be sure to communicate through the closed space at least once during one turn
Is done. The above positional relationship is expressed as follows. [0025] λ_b> Λ_in> Λ_b-2π (1) here, λ_in:Refrigerant injection poreScroll wrap winding in position
Angle (rad) λ_b : Scroll wrap at pore position for deriving gas pressure
Winding angle (rad) π: Pi. In addition,Refrigerant injection pore139a, 139b
The diameter of the gas pressure deriving fine holes 124a and 124b is
Should be set to a value smaller than the upper wrap thickness.
No. In the embodiment shown in FIG.Refrigerant injection
For pores139a and 139b are scroll wrap
Λ as the winding angle_in$ 8.0 rad. Also, gas pressure
The positions of the outlet holes 124a and 124b are
Λ_b≒ 12.0 rad position,
The above expression (1) is satisfied. [0028]Refrigerant injection poreAnd gas pressure derivation pore
By setting the positional relationship as described above,
At startupLiquid refrigerantIn the enclosed space 121Abundantly present
Even if, Gas pressure deriving pores 124a, 124bAnd ream
When passing through, part of the liquid refrigerantEscape to back pressure chamber 123Can be
CanYou. Next, the operation of the above embodiment will be described.
With the above configuration, the turning scroll rotates.
As a result, the positional relationship with the fixed scroll is as shown in FIG.
ThenRefrigerant injection pore139a and gas pressure deriving pores 12
4a communicates through the closed space 121a,Refrigerant injection
Required pore139b and gas pressure deriving pores 124b are closed
It communicates via the space 121b. As a result, the gas pressure
For the orbiting scroll member 10 via the pipe 125.
5 communicates with the back pressure chamber 123 on the backBecause, Working gas
Injected into the closed spaces 121a and 121b for cooling
The separated liquid refrigerant is supplied to the gas pressure deriving fine holes 124a and 124.
b to the back pressure chamber 123 via the pipe 125
Can be. Note that the gas pressure deriving pore is swirled by a rotating scroll.
When provided on the end plate portion 105a of the
The liquid refrigerant inside the closed spaces 121a and 121b is directly
Escape to the back pressure chamber 123 side through the pressure pressure outlet hole 124
be able to. The meaning of the above equation (1) is that
During one orbiting movement of the orbiting scroll member 105, be sure to
Once through the closed space 121a, 121bRefrigerant injection
Required pore139a, 139b and gas pressure deriving pores 124
a and 124b communicate with each other.
To taste. That is, in a scroll compressor,
Of a swivel and fixed scroll wrap forming an enclosed space
The contact point of the discharge port side and the suction port side
Because it is formed with exactly one turn (2π) at the winding angle,
The position of the liquid injection pore is one turn relative to the gas pressure derivation pore.
By setting it within (2π), those pores are swirled.
Be sure to go through the closed space once during one rotation of the crawl (2π).
Will be in communication. In addition, instead of the above equation (1), the following equation is used.
It may be configured as follows. λ_in= Λ_b                          … (2) here, λ_in:Refrigerant injection poreScroll wrap at position
Winding angle (rad) λ_b : Scroll rack at the position of the gas pressure deriving pore
Winding angle (rad). The above equation (2) isRefrigerant injection poreAnd gas pressure conduction
A state where the outlet pore is always in communication with the outlet through a closed space.
It means becoming. The above configuration prevents liquid compression,
Or it is most effective for the function of mitigating. FIG. 3 shows a finger at the initial stage of starting the scroll compressor.
The pressure diagram (P-λ diagram) is shown in the case of this embodiment (solid line)
When there is no refrigerant passage (conventional model) (single-dot chain
FIG. The horizontal axis is a scroller instead of the volume V.
It is displayed as the top winding angle λ. (λ_sIs scroll
The winding angle is λ_e Is the scroll wrap end angle
Is shown. ) In the case of the conventional machine, compress the incompressible liquid refrigerant
So that the pressure inside the scroll becomes the discharge pressure P
_d Fluid pressure P that greatly exceeds_max Acts
However, in the case of the present embodiment, the gas pressure deriving fine holes 124a, 1
24b is through an enclosed spaceRefrigerant injection pore139a, 13
9b, the closed space 121
a and 121b are no longer completely enclosed spaces,
To form a compressed working chamber. Therefore, the liquid pressure P
_max Liquid refrigerant toward the back pressure chamber 123 with a lower pressure level
Moves, and the pressure in the sealed spaces 121a and 121b decreases.
You. Naturally, the pressure P in the back pressure chamber 123_b Is hydraulic
Force P_max Against P_b≪P_max It becomes the relationship. Shiatsu chart
The area enclosed by is proportional to the required power of the compressor,
According to the present embodiment, the abnormality in the closed space due to the liquid compression
Pressure rise is prevented, so power reduction (startup)
Dynamic torque). In the above embodiment, the gas pressure deriving pores
124a and 124b are fixed scroll end plates 101
a, but at a position corresponding to the end plate of the orbiting scroll member.
It may be provided. Also,Refrigerant injection pore139a, 139b
And the gas pressure deriving pores 124a and 124b are
Although a pair (two) are provided at symmetrical positions,
For the same reason, even if one of the above pores is provided,
The effect can be achieved. Another embodiment of the present invention will be described with reference to FIGS.
explain. The embodiment shown in FIG.Refrigerant injection pore141
a, 141b is the winding start end P of the scroll wrap,
End plate 1 of fixed scroll wrap within 1 turn from P '
01a on the side wallAlongAt the right position,Refrigerant injection
Pores 141a, 141b Opening is a turning scroll
Is formed by both scroll members due to the swiveling motion of
Only between the fixed scroll member and the discharge port 102 through the space
It is configured to communicate intermittently. [0039]Refrigerant injection poreIs given by the following equation. λ_in<Λ_s+ 2π (3) here, λ_in:Refrigerant injection poreScroll wrap at position
Winding angle (rad) λ_s : Scroll wrap winding start angle (rad) π: Pi. With the above structure, the liquid injected into the closed space
The refrigerant is discharged intermittently by the swirling motion of the swirling scroll.
102, a large amount of liquid refrigerant in the enclosed space
The liquid compression can be prevented even when the liquid is injected. In the above equation (3), practically,
The input pores 141a and 141b are       λ_in≒ λ_s+ 2π- (π / 6 to π / 4) (4) Is preferable. Note thatRefrigerant injection pore141a opening
Is,FixedScroll wrap winding start from end PThatLa
Within one roll along the outer circumference of theAnd the end of the winding
Near the outer peripheral surface of the fixed scroll wrap at one or more turns
KunoPosition,Refrigerant injection pore141bof
The opening pivots in the state of FIG.Scroll wrap winding
From the end P 'to the outer circumferential surface of the scroll scroll wrap
Within about one turn alongAnd at least one turn from the end of the turn
Near the outer peripheral surface of the scroll scroll wrap in the upper position
PositionInner peripheral surface of fixed scroll wrapAlongposition
(That is, fixedScroll wrap winding start end P
Are approximately 1.5 along the inner circumference of the fixed scroll wrap.
(Within a winding position). FIG. 5 shows the pressure inside the scroll of this embodiment.
Ideal field showing the relationship between the angle and the scroll wrap winding angle
The acupressure diagram (P-λ diagram) is shown. Λ in the figure_q Is a figure
The scroll wrap winding start portions P and P 'shown in FIG.
Of the first turn from outside to the wrap point Q and Q '
Shows the winding angle of the scroll wrap. Therefore, during the discharge stroke
Liquid refrigerant inofIn the injection period, in other words in the discharge stroke
With the outlet through a closed spaceRefrigerant injection pore141a, 14
According to FIG. 5, the period during which the communication between the scroll lbs.
In terms of the winding angle, the contact area is
You. [0044] Δλ_d= Λ_q−λ_in                        … (5) here, Δλ_d : A screen that is a liquid refrigerant injection section during the discharge stroke
Contact range on roll wrap winding angle (rad) λ_in  :Refrigerant injection poreScroll
Winding angle (rad) λ_q   : Contact point Q of both scrolls at the moment of completion of discharge stroke,
The scroll wrap winding angle at the position Q '(ra
d). By adopting the above configuration, the turning scroll
-During one revolution ofRefrigerant injection poreIs the discharge space and Δλ_d(ra
d) Can communicate intermittently within the range of rotation angle
You. FIG. 6 shows a combination of the embodiment of FIGS. 2 and 4 described above.
Equivalent to the combinedRefrigerant injection poreAnd for deriving gas pressure
The positional relationship between the pores and the discharge port is configured as follows.
It is. That is,Refrigerant injection pore142a, 14
2b is one or more turns from the end of the scroll wrap
Fixed scroll wrap insideNearTogether with the location
The gas pressure deriving pores 143a and 143b areFor refrigerant injection
poreEnd of wrap further than the position of 142a, 142b
Provided at a position within one turn toward the edge (outside)
It is a thing. The above positional relationship is expressed by the following equation.       λ_s+ 2π> λ_in> Λ_b-2π ... (6) here, λ_in:Refrigerant injection poreScroll wrap at position
Winding angle (rad) λ_s : Scroll wrap winding start angle (rad) λ_b : Scroll rack at the position of the gas pressure deriving pore
Winding angle (rad) π: Pi. By configuring each of the pores in the above positional relationship,
And a refrigerant injection hole 142 for injecting a liquid refrigerant into the closed space.
a and 142b intermittently communicate with the discharge space.
For deriving gas pressure through the sealed spaces 121a and 121b
It is possible to intermittently communicate with the fine holes 143a and 143b.
it can. Therefore, the injected liquid refrigerant flows into the discharge space and the back pressure chamber.
Liquid intermittently flows into the
It can be completely prevented and abnormal pressure rise in the enclosed space can be prevented.
Wear. In the embodiment shown in FIG.
Specific examples of the positional relationship between 142b, 143a, and 143b
In terms of a value, for example, to satisfy the expression (6), for example, λ_s≒ 1.1rad λ_q≒ 7.4 rad λ_in≒ 6.8rad λ_b$ 12.5rad ... (7) Becomes As shown in the above equation (6),Refrigerant injection
Required poreThe positions of 142a and 142b are the gas pressure
From the positions of the holes 143a and 143b,
Set to direction. This is a high discharge pressure,Refrigerant injection
For poresPressure difference with the internal pressure of the closed space where
Liquid refrigerantofExcessive cooling with lower injection volume
This is to prevent rejection. FIG. 7 shows an atmosphere in which the interior of the closed container is mainly at the suction pressure.
Vertical closed scroll of low pressure chamber type in the atmosphere
FIG. 4 shows a compressor, and in the case of the embodiment described with reference to FIG.
7 can be applied to scroll compressors.
You. In FIG. 7, a solid container 200
Between the constant scroll member 201 and the orbiting scroll member 205
Compressor section at the top and motor section 259 at the bottom
And a compressor unit and an electric motor unit are connected to each other via a rotating shaft 257.
It is stored. The rotation shaft 257 is provided on the frame 256.
Main bearing 262 and a lower bearing 263 provided on the bottom wall.
Slewing bearing 2 eccentrically provided above the main shaft
61 supports the orbiting shaft 257a of the orbiting scroll member
I have. 262a is a thrust bearing (rolling bearing),
The gas force generated in the closed space (compression chamber) of the compressor
Support with bearings. 258 is Oldham mechanism, 264 is inhalation
Pipe, 274 is a discharge pipe, 278 isRefrigerant injection pipeIs shown. 26
7 is formed on the back of the fixed scroll by a partition wall 267a.
Closed space 221 in the compression process
It communicates with the pores 268 and becomes a preliminary pressure chamber. Solid
The dashed arrows indicate the direction of refrigerant gas flow, and the dashed arrows indicate the flow of liquid refrigerant.
Indicates the direction. The refrigerant gas is introduced from the suction pipe 264,
It reaches the motor space of the sealed container 200 and cools the motor.
The flow then rises, and the suction holes 256 provided in the frame 256
a, into the suction chamber 222 on the outer periphery of the scroll compressor.
Inhaled. Next, the orbiting motion of the orbiting scroll member
And moved to the center to be compressed and cooled by the injection liquid refrigerant described below.
And the discharge port 271 in the upper part of the closed container is connected to the discharge port 266.
Is discharged. Then, outside the machine (condensation) via the discharge pipe 274
Device). On the other handRefrigerant injection pipeLiquid cooling supplied from 278
The medium is injected into the closed space 221 through the fine holes 269,
Cool the working gas. The aboveRefrigerant injection pore269 is the present embodiment
Is provided on the head plate, and the above-mentioned pore 269 is
With respect to the pressure deriving pores 268,
And the gas pressure derivation holes 268
It is formed so as to communicate intermittently via a closed space.
Intermediate pressure chamber 267 in which gas pressure deriving pore 268 opens
With the above structure, the liquid refrigerant
Is intermittently injected to provide a space for the liquid refrigerant to escape. In addition, the aboveRefrigerant injection poreAnd gas pressure derivation
The positional relationship of the pores for use is set to the positional relationship shown in the above equation (2).
May be specified. Also, a low-pressure refrigerant gas area shown in FIG.
Low pressure chamber type closed scroll with built-in motor
In the case of a compressor, low-temperature suction refrigerant gas
Cooling can be performed, so the liquid injected for cooling the motor
There is an advantage that the amount of refrigerant can be reduced. This liquid to inject
As much as the amount of refrigerant can be reduced,
The amount of liquid refrigerant present also decreases, and when starting in an enclosed space
And so on can further avoid the liquid compression action.
Then, reduce the amount of injected liquid refrigerant for cooling.
As a result, the power of the compressor can be reduced,
Energy saving can be realized. Also, when starting up
Completely avoids the liquid refrigerant compression effect in
Reduction in power and start-up power can be achieved. Therefore,
Accident and start of scroll wrap as seen in the installation
Prevents failure phenomena and foreign matter from entering the condenser
And greatly enhances the reliability of the scroll compressor and refrigeration system.
Can be improved. [0059] As described above, according to the present invention, both
Inject refrigerant into the closed space formed by the scroll member
Cools the working gas and starts and stops the compressor.
Just before, for example, the injected incompressible liquid refrigerantClosed space
If there is a large amount in theAlso this liquid refrigerantLess of
With someThe hole for deriving pressure during one rotation of the rotating scroll
And can be discharged through the discharge port.
Prevent abnormal pressure rise inside enclosed spaceofCan do
Crawler fluid machineAnd scroll fluid deviceIs effective
There is fruit. Therefore, scroll wrap by liquid compression
Due to a breakage accident or abnormal pressure increase in the enclosed space.
The roll member separates from the fixed scroll member and compresses.
It is possible to prevent start-up failure such as no longer running.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a refrigeration cycle refrigerant circuit showing a refrigeration apparatus using a scroll fluid machine according to one embodiment of the present invention;
It is the figure which showed only the principal part of the scroll fluid machine in the longitudinal cross-sectional view. FIG. 2 is a cross-sectional view of the embodiment of FIG. 1 in a meshing state of the scroll wrap. FIG. 3 is a Shiatsu diagram (P-λ diagram) showing a pressure change in a closed space in the embodiment of FIG. 2; FIG. 4 is a cross-sectional view showing a scroll wrap in an engaged state according to another embodiment of the present invention. FIG. 5 is an acupressure diagram showing a pressure change in a closed space in the embodiment of FIG. 4; FIG. 6 is a cross-sectional view showing a still further embodiment of the present invention in a scroll wrap meshing state. FIG. 7 is a longitudinal sectional view showing an example in which the present invention is applied to a closed scroll fluid machine of a low-pressure chamber type. [Description of Signs] 101: fixed scroll member, 101a: mirror plate, 102
... discharge port, 103 ... suction port, 105 ... revolving scroll member, 121a, 121b ... closed space, 122 ... suction chamber,
123: back pressure chamber, 131: discharge pipe, 124a, 124
b, 143a, 143b ... pores for deriving gas pressure, 135 ...
Refrigerant injection pipe , 137 ... pressure reducer, 139a, 139
b, 141a, 141b, 142a, 142b ... refrigerant injection
Input pores , 164: suction pipe, 182: condenser, 184
... expansion valve, 185 ... evaporator.

Claims (1)

(57) [Claims] The fixed scroll member and the orbiting scroll member, which have the spiral wrap standing upright on the end plate, are engaged with each other with the wraps inward, and the frame for fixing the fixed scroll member and the rear surface of the end plate of the orbiting scroll member are constituted. A back pressure chamber is provided, and a gas pressure deriving hole for guiding a gas being compressed from an enclosed space formed by the fixed scroll member and the orbiting scroll member is provided in the back pressure chamber. The scroll member is provided on the end plate portion of the scroll member, and the orbiting scroll member is rotated with respect to the fixed scroll member without rotating, and the fixed scroll member is opened at the discharge port opened at the center portion and at the outer peripheral portion. A suction port is provided, gas is suctioned from the suction port, the gas is moved around a closed space formed by both scroll members to reduce the volume and compress the gas, and the compressed gas is discharged from the discharge port. Discharge to scroll - in Le fluid machine, so as to open into said closed space, a cold for working gas cooling
A medium injection hole is provided through the end plate portion of the fixed scroll member, and the opening of the refrigerant injection hole is directed from the position of the gas pressure derivation hole toward the winding start side of the wrap. A scroll fluid machine, wherein the position is within one turn of a wrap. 2. The fixed scroll member and the orbiting scroll member that erect the spiral wrap on the end plate are engaged with each other with the wraps inside, and the orbiting scroll member is rotated with respect to the fixed scroll member without rotating. A gas outlet is provided by providing a discharge port that opens to the portion and a suction port that opens to the outer peripheral portion, sucks gas from the suction port, moves around the closed space formed by both scroll members, reduces the volume, and compresses the gas. In a scroll fluid machine that discharges a compressed gas from a discharge port, a refrigerant for cooling a working gas that opens into the closed space is used.
Micropores are provided through the end plate portion of the fixed scroll member, and the opening of the refrigerant injection micropores is formed within one turn from the start end of the scroll wrap along the outer peripheral surface of the wrap and ends at the end. A scroll fluid machine characterized by being positioned at least one turn from an end . 3. In claim 2, the fixed scroll wrap winding starts.
From the end, along the inner peripheral surface of the fixed scroll wrap.
Within 5 turns and at least 1 turn from the end of winding
A scroll fluid machine having a coolant injection hole . 4. Fixed scroll section that uprights the spiral wrap on the end plate
Material and orbiting scroll member with the wrap inside each other
A frame for fixing the fixed scroll member
Back pressure chamber composed of the orbiting scroll member
The fixed scroll member and the orbiting scroll are provided in the back pressure chamber.
From the enclosed space formed by the
End plate of scroll member fixing gas pressure outlet pore
On the end plate of the rotating scroll member.
A fixed scroll member without rotating the scroll member
Orbital motion, and the fixed scroll member
A discharge port that opens and a suction port that opens on the outer periphery are provided.
Inhales gas from the inlet and is formed by both scroll members
Move gas around enclosed space to reduce volume and compress gas
Fluid machine that discharges compressed gas from the discharge port
And a condenser connected to the discharge side of the scroll fluid machine.
In the scroll fluid device provided with the fixed scroll portion, the fixed scroll portion is opened in the closed space.
Position of the gas pressure deriving pores that penetrate the end plate part of the material
Within 1 wrap of wrap from
A refrigerant gas injection hole provided at a position and a refrigerant condensed in the condenser to the refrigerant injection hole.
Characterized by having a refrigerant injection pipe
Fluid device. 5. Fixed scroll section that uprights the spiral wrap on the end plate
Material and orbiting scroll member with the wrap inside each other
Engage and fix the orbiting scroll member without rotating.
Orbital movement with fixed scroll member, fixed scroll
The member has a discharge port opening at the center and a suction port opening at the outer periphery.
The inlet is provided to suck the gas from the inlet port, Ryosu crawling unit
Move around the enclosed space formed by the material to reduce the volume
Slightly compress the gas and discharge the compressed gas from the outlet
A scroll fluid machine, and a condenser connected to a discharge side of the scroll fluid machine.
In the scroll fluid device provided with the fixed scroll portion, the fixed scroll portion is opened in the closed space.
The end of the scroll wrap winding start
And within 1 turn along the outer circumference of the wrap
At least one turn from the end
Injecting refrigerant for cooling working gas provided near the outer peripheral surface of the pump
And the refrigerant condensed in the condenser is guided to the refrigerant injection hole.
Characterized by having a refrigerant injection pipe
Fluid device. 6. Claim 5: Starting the fixed scroll wrap winding.
From the end, along the inner peripheral surface of the fixed scroll wrap.
Within 5 turns and at least 1 turn from the end of winding
Characterized in that a hole for refrigerant injection is also provided.
Fluid device.