CN2714847Y - Back pressure mechanism of scroll compressor - Google Patents
Back pressure mechanism of scroll compressor Download PDFInfo
- Publication number
- CN2714847Y CN2714847Y CN 200420049470 CN200420049470U CN2714847Y CN 2714847 Y CN2714847 Y CN 2714847Y CN 200420049470 CN200420049470 CN 200420049470 CN 200420049470 U CN200420049470 U CN 200420049470U CN 2714847 Y CN2714847 Y CN 2714847Y
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- back pressure
- pressure mechanism
- high pressure
- assembly
- fixed scroll
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Abstract
The utility model is a back pressure mechanism of scroll compressor, the top of the cooling medium channel in the center of the fixing scroll is provided with a recess of which the outer ring is provided with a ring groove, the recess point is provided with a high-pressure sealing assembly consisting of an upper high-pressure ring, a sealing element and a lower high-pressure ring, and the ring groove point is provided with a medium-pressure sealing assembly consisting of an upper medium-pressure ring and a lower medium-pressure ring so as to compose the back pressure mechanism which ensures the high and medium-pressure sealing assemblies being floated up by an axial obeying and vacuum unloading action generated by a compressing cooling medium so as to effectively prevent the compressing cooling medium being leaked.
Description
Technical field
The utility model relates to the improvement of the back pressure mechanism among the scroll compressor, aims to provide one and can prevent the back pressure mechanism that compression refrigerant leaks really.
Background technique
Shown in Figure 1A, B, be the structure sectional view of 30 of shell 10, moving scrollwork 20 for general scroll compressor and fixed scrolls and the structural representation of known back pressure mechanism, its compressor mainly is to do the motion that rotates in the inside of shell 10 by 20 pairs of fixed scrolls 30 of a moving scrollwork, form the cumulative several pressing chambers 40 of pressure from outside to inside in 20 pairs of fixed scrolls 30 of moving scrollwork, and then make refrigerant form compression effects by the volume change of pressing chamber 40.
Wherein, refrigerant through overcompression is the hyperbaric chamber 11 that is entered shell 10 inner and upper spaces by the pressing chamber 40 at fixed scroll 30 centers, so its position, refrigerant passage 31 outer ring in fixed scroll 30 top center, be provided with an annular groove 32, and be provided with a by-pass duct 33 that communicates with pressing chamber 40 at annular groove 32 places, and be provided with a ring 51 at annular groove 32 places, its ring 51 and annular groove 32 mutually sheathed positions are provided with seal element 60 in addition, and in the intrinsic ring seat 52 of the center lock of ring 51, by the bear down on one spacing block 12 of 11 belows of ring seat 52 in the hyperbaric chamber, and between ring seat 52 and ring 51, be lined with seal element 60, and constitute a back pressure mechanism.
As for, the function of its back pressure mechanism, mainly be when compressor operation, can pressure partly be directed in the annular groove 32 by by-pass duct 33, with form one with ring 51 together with ring seat 52 active force of ejection upwards, in the hope of increasing the tightness of fixed scroll 30 and spacing block 12, avoid the leakage of compression refrigerant.
Yet, before disclosed known back pressure mechanism, be to announce Re.35 for the U.S., No. 216 back pressure mechanism, wherein ring seat 52 is to be provided in simultaneously in the annular groove 32 with ring 51, when the middle pressure chamber pressure in this compressor during greater than hyperbaric chamber pressure, its single seal element 60 is to reach complete sealing effect, and form a leak path, shown in Figure 1B, will make the cold coal in middle pressure chamber of annular groove 32 leak to hyperbaric chamber 11.
Moreover, when running, lose original tight function as if seal element 60, to make the high-pressure leakage of refrigerant passage 31 to the middle nip territory of annular groove 32, the pressure anomaly in nip territory rises in causing, the strength that then promotes fixed scroll will be more much higher than design load, so not only influence the actual operation usefulness of whole back pressure mechanism, especially can reduce the efficient of compressor, even lose efficacy.
The model utility content
The back pressure mechanism of the utility model scroll compressor is to be provided with a dimple at the refrigerant passage top at fixed scroll center, is equipped with an annular groove in the outer ring of dimple; Wherein, because of the seat place is provided with the high pressure sealing assembly of tool floating action, the annular groove place is provided with the middle means of press seals assembly of same tool floating action; And, be provided with a by-pass duct that communicates with pressing chamber at the annular groove place of fixed scroll; Guarantee the spacing block buoyance lift ejection of height, middle means of press seals assembly to constitute one towards the below, hyperbaric chamber, and by the pressure of compression refrigerant fixed scroll is produced one axially be obedient to, the effect of vacuum unloading, to promote the back pressure mechanism of compressor operation efficient.
The technical solution of the utility model is:
A kind of back pressure mechanism of scroll compressor, its compressor is by a moving scrollwork fixed scroll to be done the motion that rotates in the inside of shell, in the moving scrollwork fixed scroll is formed the cumulative several pressing chambers of pressure from outside to inside, and then change by the volume of pressing chamber and to make refrigerant form compression effects, and the top of shell is to separate into a hyperbaric chamber by a spacing block, enters in the hyperbaric chamber and its refrigerant through overcompression is a pressing chamber by the fixed scroll center;
Wherein, the refrigerant passage top at fixed scroll center is provided with a dimple, is equipped with an annular groove in the outer ring of dimple;
Wherein, the dimple place is provided with the high pressure sealing assembly of tool floating action, and the annular groove place is provided with the middle means of press seals assembly of same tool floating action;
Wherein:
This high pressure sealing assembly from top to bottom is made up of last high pressure sealing ring seal element, high pressure sealing ring seat in regular turn;
Should from top to bottom be formed by junk ring seal element, middle means of press seals ring seat in last in regular turn by middle means of press seals assembly;
The annular groove place of this fixed scroll is provided with a by-pass duct that communicates with one of them pressing chamber, this height, the spacing block buoyance lift ejection of middle means of press seals assembly below the hyperbaric chamber, and by the pressure of compression refrigerant fixed scroll is produced one axially be obedient to, the effect of vacuum unloading, to promote the back pressure mechanism of compressor operation efficient.
Is provided with an elastic element in high pressure sealing assembly below in this annular groove, this elastic element can produce the fixing upwards elastic force of ejection high pressure sealing assembly, make the high pressure sealing assembly can with the certain driving fit of spacing block.
This elastic element is a spring.
Between this height, the middle means of press seals assembly is to constitute connection by coupling gear.
This coupling gear is clasp or is jointing plate more than one.
Be provided with spring between means of press seals assembly and the spacing block in being somebody's turn to do.
Description of drawings
Figure 1A is the structure sectional view between shell, moving scrollwork and the fixed scroll of general scroll compressor and the structural representation of known back pressure mechanism;
Figure 1B is the back pressure mechanism enlarged diagram of Figure 1A;
Fig. 2 A, B are the utility model first embodiment's back pressure mechanism sectional view;
Fig. 3 is the utility model second embodiment's a back pressure mechanism sectional view;
Fig. 4 is the utility model the 3rd embodiment's a back pressure mechanism sectional view;
Fig. 5 is the utility model the 4th embodiment's a back pressure mechanism sectional view;
Fig. 6 is the utility model the 4th embodiment's a back pressure mechanism plan view;
Fig. 7 is the utility model the 5th embodiment's a back pressure mechanism sectional view;
Fig. 8 is the utility model the 6th embodiment's a back pressure mechanism sectional view.
[figure number explanation]
Aa ' interval area 61 resilient fold
High pressure sealing ring on the K space 71
10 shells, 72 high pressure sealing ring seats
11 hyperbaric chambers, 73 coupling gears
12 spacing blocks, 731 clasps
20 moving scrollworks, 732 jointing plates
30 fixed scrolls, 75 springs
Means of press seals assembly in 31 refrigerant passages 80
Junk ring on 32 annular grooves 81
Means of press seals ring seat in the 33 shallow pressure ducts 82
34 alcoves, 90 vent caps
35 fixed scroll pressing plates, 100 back pressure mechanism assemblies
40 pressing chambers, 101 back pressure rings
51 rings, 102 pressing plates
52 ring seats, 200 back pressure mechanism assemblies
60 seal elements
Embodiment
For the clear structure of the present utility model of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:
The back pressure mechanism of the utility model scroll compressor, the basic function mode of its compressor is shown in Fig. 2 A, be to do the motion that rotates by 20 pairs of fixed scrolls 30 of a moving scrollwork equally in the inside of shell 10, form the cumulative several pressing chambers 40 of pressure from outside to inside in 20 pairs of fixed scrolls 30 of moving scrollwork, and then change by the volume of pressing chamber 40 and to make refrigerant form compression effects, and the space of shell 10 inner and upper is to separate into a hyperbaric chamber 11 by a spacing block 12, and its refrigerant through overcompression is to be entered in the hyperbaric chamber 11 by the pressing chamber 40 at the fixed scroll 30 centers refrigerant passage 31 through fixed scrolls 30 centers.
Wherein, fixed scroll 30 refrigerant passage 31 tops of the heart therein is provided with a dimple 34, the outer ring of dimple 34 then is equipped with an annular groove 32, is provided with the high pressure sealing assembly of from top to bottom being made up of last high pressure sealing ring 71, seal element 60, high pressure sealing ring seat 72 in regular turn 70 in dimple 34; As for, annular groove 32 places then are provided with the middle means of press seals assembly of from top to bottom being made up of junk ring 81, seal element 60, middle means of press seals ring seat 82 in last in regular turn 80; And, be provided with a by-pass duct 33 that communicates with one of them pressing chamber 40 at annular groove 32 places of fixed scroll 30.
According to this, promptly constitute one and guarantee height, the spacing block 12 buoyance lift ejections of middle means of press seals assembly 70,80 below the hyperbaric chamber, and leak to fixed scroll 30 outsides by what the seal action of seal element 60 effectively prevented compression refrigerant, and by the pressure of compression refrigerant fixed scroll is produced one axially be obedient to, the effect of vacuum unloading, to promote the back pressure mechanism of compressor operation efficient.
Again and since the main leak path of seal element be by high pressure to low pressure and in be depressed into low pressure, so,, also be unlikely the situation that the pressure anomaly of pressing in causing rises even the tight function of seal element takes place when not good.
Certainly, be provided with an elastic element in high pressure sealing assembly 70 in this annular groove 32, present embodiment is to be spring B, shown in Fig. 2 B, this spring B can produce the fixing upwards elastic force of ejection high pressure sealing assembly 70, make high pressure sealing assembly 70 can with spacing block 12 certain driving fits, to avoid leakage.
In addition, as shown in Figures 3 and 4, between high, the middle means of press seals assembly 70,80 be can by coupling gear 73 do one connect and this case embodiment's coupling gear 73 to be forms with clasp 731 connect, to guarantee the buoyance lift effect of high pressure sealing assembly 70; Certainly, the coupling gear 73 between high, the middle means of press seals assembly 70,80 can also by as Fig. 5 and shown in Figure 6 locked with the jointing plate more than one 732 be coupled to one; And, between middle means of press seals assembly 80 and spacing block 12, be provided with spring 75, with in the improper operational situation of compressor, when blocking the running of generation vacuum as suction port, be able to height, 70, the 80 downward ejections of middle means of press seals assembly, cause high pressure and low pressure bypass,, avoid the danger that electric arc takes place, cause motor to burn to prevent the shell 10 inner vacuum states that produce.
Moreover, as shown in Figure 7, high pressure sealing assembly 70 becomes a back pressure mechanism assembly 100 with middle means of press seals assembly 80 with integrated form, and wherein back pressure mechanism assembly 100 is to comprise back pressure ring 101 and pressing plate 102, and is provided with seal element 60 in addition in back pressure ring 101 and 102 of pressing plates; 100 of fixed scroll 30 and back pressure mechanism assemblies are locked on the fixed scroll 30 with a fixed scroll pressing plate 35 again, and with seal element 60 sealings, refill and join back pressure mechanism assembly 100.
Pressure because of the space K that makes 35 of back pressure ring 101 and fixed scroll pressing plates is in low-pressure state equally again, communicates with space K so be provided with a vent cap 90 in back pressure ring 101 appropriate positions, so that the pressure of space K is identical with suction pressure.
So, as the interval area a of high pressure sealing assembly 70 tops and spacing block 12 formation interval area a ' greater than high pressure sealing assembly 70 belows and dimple 34 formation, and when causing this compressor to vacuumize, back pressure mechanism gets final product downward ejection, cause high pressure and low pressure bypass, can prevent the shell 10 inner vacuum states that produce, avoid the danger that electric arc takes place, cause motor to burn.
In addition, as shown in Figure 8, wherein, the form that high, middle means of press seals assembly 70,80 can also be formed in one becomes a back pressure mechanism assembly 200, and in the sliding contact slit of back pressure mechanism assembly 200 and dimple 34 and annular groove 32, be provided with seal element 60, each seal element 60 is to have corresponding flanging 61, and is able to by flanging 61 certain and each surface of contact driving fit, to reach preferable airtight effect; And, the pressure that corresponds to the space K between both seal element 60 at back pressure mechanism assembly 200 is in low-pressure state equally, so being provided with a vent cap 90 in back pressure ring 101 appropriate positions communicates with space K, so that the pressure of space K is identical with suction pressure.
As mentioned above, the utility model provides scroll compressor another preferable feasible back pressure mechanism, so, offer the application of utility model patent in accordance with the law; Yet; above implementation and graphic shown in; it is one of the utility model preferred embodiment; be not to limit to the utility model with this; therefore; all all and the utility model structure, device, feature etc. are approximate, identical, all should belong within the protection domain of founding purpose and applying for a patent of the present utility model.
Claims (6)
1, a kind of back pressure mechanism of scroll compressor, its compressor is by a moving scrollwork fixed scroll to be done the motion that rotates in the inside of shell, in the moving scrollwork fixed scroll is formed the cumulative several pressing chambers of pressure from outside to inside, and then change by the volume of pressing chamber and to make refrigerant form compression effects, and the top of shell is to separate into a hyperbaric chamber by a spacing block, enters in the hyperbaric chamber and its refrigerant through overcompression is a pressing chamber by the fixed scroll center;
Wherein, the refrigerant passage top at fixed scroll center is provided with a dimple, is equipped with an annular groove in the outer ring of dimple;
Wherein, the dimple place is provided with the high pressure sealing assembly of tool floating action, and the annular groove place is provided with the middle means of press seals assembly of same tool floating action;
It is characterized in that:
This high pressure sealing assembly from top to bottom is made up of last high pressure sealing ring seal element, high pressure sealing ring seat in regular turn;
Should from top to bottom be formed by junk ring seal element, middle means of press seals ring seat in last in regular turn by middle means of press seals assembly;
The annular groove place of this fixed scroll is provided with a by-pass duct that communicates with one of them pressing chamber, this height, the spacing block buoyance lift ejection of middle means of press seals assembly below the hyperbaric chamber, and by the pressure of compression refrigerant fixed scroll is produced one axially be obedient to, the effect of vacuum unloading, to promote the back pressure mechanism of compressor operation efficient.
2, the back pressure mechanism of scroll compressor as claimed in claim 1, it is characterized in that: be provided with an elastic element in high pressure sealing assembly below in this annular groove, this elastic element can produce the fixing upwards elastic force of ejection high pressure sealing assembly, make the high pressure sealing assembly can with the certain driving fit of spacing block.
3, the back pressure mechanism of scroll compressor as claimed in claim 1 is characterized in that: this elastic element is a spring.
4, the back pressure mechanism of scroll compressor as claimed in claim 1 is characterized in that: between this height, the middle means of press seals assembly is to constitute connection by coupling gear.
5, the back pressure mechanism of scroll compressor as claimed in claim 4 is characterized in that: this coupling gear is clasp or is jointing plate more than one.
6, the back pressure mechanism of scroll compressor as claimed in claim 4 is characterized in that: be provided with spring between means of press seals assembly and the spacing block in this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420049470 CN2714847Y (en) | 2004-04-27 | 2004-04-27 | Back pressure mechanism of scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420049470 CN2714847Y (en) | 2004-04-27 | 2004-04-27 | Back pressure mechanism of scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2714847Y true CN2714847Y (en) | 2005-08-03 |
Family
ID=34872450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420049470 Expired - Fee Related CN2714847Y (en) | 2004-04-27 | 2004-04-27 | Back pressure mechanism of scroll compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2714847Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016344A (en) * | 2008-01-16 | 2013-04-03 | 艾默生环境优化技术有限公司 | Scroll machine |
| CN101684793B (en) * | 2008-09-27 | 2013-07-31 | 乐金电子(天津)电器有限公司 | Turbine compressor |
| CN104179681A (en) * | 2013-05-22 | 2014-12-03 | 欧柏里斯特机电有限公司 | Scroll-type compressor and CO2 vehicle air conditioning system having a scroll-type compressor |
| CN105840510A (en) * | 2007-09-11 | 2016-08-10 | 艾默生环境优化技术有限公司 | Compressor sealing arrangement |
| CN114215750A (en) * | 2021-11-24 | 2022-03-22 | 苏州为山之环境技术有限公司 | Axial sealing mechanism and scroll compressor comprising same |
-
2004
- 2004-04-27 CN CN 200420049470 patent/CN2714847Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840510A (en) * | 2007-09-11 | 2016-08-10 | 艾默生环境优化技术有限公司 | Compressor sealing arrangement |
| CN103016344A (en) * | 2008-01-16 | 2013-04-03 | 艾默生环境优化技术有限公司 | Scroll machine |
| CN103016344B (en) * | 2008-01-16 | 2015-08-12 | 艾默生环境优化技术有限公司 | Scroll machine |
| CN101684793B (en) * | 2008-09-27 | 2013-07-31 | 乐金电子(天津)电器有限公司 | Turbine compressor |
| CN104179681A (en) * | 2013-05-22 | 2014-12-03 | 欧柏里斯特机电有限公司 | Scroll-type compressor and CO2 vehicle air conditioning system having a scroll-type compressor |
| CN104179681B (en) * | 2013-05-22 | 2018-03-16 | 欧柏里斯特机电有限公司 | Scroll compressor and the CO with scroll compressor2Vehicle air conditioner |
| CN114215750A (en) * | 2021-11-24 | 2022-03-22 | 苏州为山之环境技术有限公司 | Axial sealing mechanism and scroll compressor comprising same |
| CN114215750B (en) * | 2021-11-24 | 2024-01-23 | 苏州为山之环境技术有限公司 | Axial sealing mechanism and scroll compressor comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050803 |