CN201096070Y - Cold compressor piston decreasing clearance volume - Google Patents
Cold compressor piston decreasing clearance volume Download PDFInfo
- Publication number
- CN201096070Y CN201096070Y CNU2007200733794U CN200720073379U CN201096070Y CN 201096070 Y CN201096070 Y CN 201096070Y CN U2007200733794 U CNU2007200733794 U CN U2007200733794U CN 200720073379 U CN200720073379 U CN 200720073379U CN 201096070 Y CN201096070 Y CN 201096070Y
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- China
- Prior art keywords
- piston
- clearance volume
- valve seat
- compressor
- uvula
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- Expired - Fee Related
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Abstract
The utility model discloses a refrigeration compressor piston, which reduces clearance volume and comprises a piston body. The utility model is characterized in that the a cylindrical small lug boss and a small tongue groove are arranged on the top plane surface of the piston body; the cylindrical small lug boss is embedded with an exhaust hole of a valve seat; the small tongue groove is sheathed with an exhalation valve plate on the valve seat, and the exhalation valve plate has a corresponding shape with the small tongue groove. The utility model reduces the clearance volume formed between a piston end plane and the valve seat, and increases the volumetric efficiency of a compressor, thus the efficiency of the complete appliance of the compressor is increased.
Description
Technical field
The utility model relates to refrigeration compressor, belongs to small-sized connecting rod piston formula refrigeration compressor piston structure especially, can reduce the clearance volume that forms between piston end surface and the valve seat.
Technical background
Piston is housed in the compressor cylinder, and cylinder head is equipped with the air valve device (see figure 1).The valve seat both sides are respectively suction valve chip and discharge valve apparatus, and suction valve chip is near cylinder head.When the suction and discharge valve block is not worked at compressor, be close to the closure gasket groove of the orifice edge of the suction pore on the valve seat respectively.When compressor operating, suction and discharge air-flow antikinesis carries out air-breathing and exhaust.Suction valve chip is generally leaf valve, and the suction valve chip appearance profile is less than the piston tip plane.
When piston turned to the outer dead point operation by inner dead point, the gas in the cylinder was compressed, and the gas pressure increase makes suction valve chip close in the cylinder.When inner cylinder pressure constantly increases, when making the pressure reduction of exhaust valve plate both sides greater than the spring force of valve block self, exhaust valve plate is opened, the beginning exhaust process.Exhaust process finishes when piston runs to outer dead point.Exhaust valve plate is in closed condition.
For fear of the exhaust surface of running into suction valve chip, piston tip surface at the end, this moment is usually essential between piston tip surface and suction valve chip to keep certain clearance T, and this moment the piston end surface plane with the close surface of piston one side of valve seat between the gap length that forms be that T adds suction valve chip thickness.So at the end still remain in this part gap at compressor air-discharging with regard to some gas, simultaneously also residual a part of gas in the exhaust port on the valve seat.There is the space of residual gas to be called clearance volume.The volume that gap and exhaust port form has occupied the overwhelming majority of clearance volume.
When piston turned to the motion of inner dead point direction by outer dead point, suction valve chip expanded rapidly near the residual gas of cylinder side, and the gas of expansion has occupied a part of volume in the cylinder, had reduced effective aspirated volume in the cylinder.
At present, the piston head end face of most of compressor manufacturer is an even curface, and the problem of this piston-shaped existence is to have reduced effective aspirated volume.Influenced the compressor overall efficiency.Therefore how to reduce clearance volume, improve the volume and the overall efficiency of compressor, become the problem of relevant scientific research personnel's development and exploitation.
Summary of the invention
The technical problems to be solved in the utility model provides the refrigeration compressor piston that reduces clearance volume, and it can reduce the clearance volume that exhaust port brings, the clearance volume that bring in the gap that can reduce to form between piston tip plane and suction valve chip and valve base surface.Improve the volume and the overall efficiency of compressor.
For solving the problems of the technologies described above, the refrigeration compressor piston that reduces clearance volume of the present utility model, comprise piston body, its structure outline is that the plane, top of piston body is provided with a cylindrical small boss and one and is the uvula connected in star, this cylindrical small boss embeds mutually with the valve seat exhaust port, the suction valve chip of respective shapes fit mutually on this uvula connected in star and the air valve device.When the position of described cylindrical small boss guaranteed that piston runs to outer dead point, small boss was just in the inserted valve seat exhaust port, its volume size, the clearance volume that reduces exactly.When described uvula connected in star guaranteed the piston arrives outer dead point, the suction valve chip unrestricted motion was partially submerged in the uvula connected in star, and the thickness that the clearance volume of minimizing is equivalent to suction valve chip multiply by piston end surface removes area beyond " uvula " connected in star.
The diameter of described cylindrical small boss and highly all be slightly less than exhaust port on the valve seat.
Described cylindrical small boss root is connected with piston end surface interplanar arc transition.
The described uvula connected in star degree of depth is consistent with the material thickness of suction valve chip.
The utility model is owing to improved the design of piston end surface shape, compared with prior art, its useful technique effect is: reduced the clearance volume that forms between piston end surface and the valve seat, improved the volumetric efficiency of compressor, thereby improved the overall efficiency of compressor.
Description of drawings
Below with reference to drawings and Examples the utility model is further described.
Fig. 1 is prior art piston end surface structure and fundamental diagram.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the utility model pistons work schematic diagram.
Among the figure: the 1st, cylinder; The 2nd, piston body; The 3rd, suction valve chip; The 4th, valve seat; The 5th, the cylindrical body small boss; The 6th, the uvula connected in star; The 7th, exhaust port.
Embodiment
As shown in Figures 2 and 3, on these embodiment's piston body 2 top ends a cylindrical body small boss 5 is arranged, the diameter of small boss 5 and highly be slightly less than exhaust port 7 on the air valve valve seat 4, small boss 5 roots are connected with piston body 2 top end arc transition.Piston 2 top ends have the groove 6 that is the uvula capitiform, and the degree of depth of groove 6 is consistent with suction valve chip 3 material thicknesses.Piston body 2 radial direction have piston pin hole, leave the space that connecting rod small end partly connects in the middle of the piston body.
During work, piston 2 is reciprocating in the cylinder 1 of compressor, and when piston 2 ran to outer dead point, the exhaust process of compressor finished.At this moment piston body 2 top plan (except that groove) and valve seat 4 have formed certain clearance T by between cylinder 1 side surface, and the suction valve chip 3 on the valve seat 4 just in time embeds and is uvula connected in star 6, and the gap that keeps between suction valve chip 3 surfaces and groove 6 bottoms also is T; The clearance volume size integral body of being brought by the gap is: piston body 2 diameters multiply by gap T.And piston body 2 top end faces are not when being with groove 6, the gap that forms between piston 2 surfaces and the suction valve chip 3 still must remain T, and this moment, piston body 2 top plan and valve seat 4 were that T adds suction valve chip 3 material thicknesses by the gap length that forms between cylinder 1 side surface.As seen after being with groove 6, the clearance volume that reduces is that suction valve chip 3 material thicknesses are multiplied by piston body 2 areas of surface except that groove 6.
Meanwhile, the exhaust port 7 on small boss 5 inserted valve seats 4 at piston body 2 tops has reduced the clearance volume brought by exhaust port 7, and the volume size that small boss 5 embeds is exactly the clearance volume that is reduced.
When the compressor air suction stage began, the gas in the clearance volume expanded, and the gas of expansion has occupied a part of aspirated volume.And adopt the piston body 2 of being with small boss 5 and groove 6, and realized the minimizing clearance volume, improved the volume of inspiration gas, improve compressor volume efficient, thereby improved the purpose of compressor overall efficiency.
Claims (3)
1. reduce the refrigeration compressor piston of clearance volume, comprise piston body, the plane, top that it is characterized in that piston body is provided with a cylindrical small boss and one and is the uvula connected in star, this cylindrical small boss embeds mutually with the valve seat exhaust port, the suction valve chip of respective shapes fit mutually on this uvula connected in star and the valve seat.
2. the refrigeration compressor piston that reduces clearance volume according to claim 1 is characterized in that the diameter of described cylindrical small boss and highly all is slightly less than exhaust port on the valve seat.
3. the refrigeration compressor piston that reduces clearance volume according to claim 1 and 2 is characterized in that the described uvula connected in star degree of depth is consistent with the material thickness of suction valve chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200733794U CN201096070Y (en) | 2007-08-07 | 2007-08-07 | Cold compressor piston decreasing clearance volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200733794U CN201096070Y (en) | 2007-08-07 | 2007-08-07 | Cold compressor piston decreasing clearance volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096070Y true CN201096070Y (en) | 2008-08-06 |
Family
ID=39923123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200733794U Expired - Fee Related CN201096070Y (en) | 2007-08-07 | 2007-08-07 | Cold compressor piston decreasing clearance volume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096070Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776059A (en) * | 2010-03-08 | 2010-07-14 | 上海英范特冷暖设备有限公司 | Structure for improving efficiency of piston type air compressor |
| CN102777348A (en) * | 2011-05-09 | 2012-11-14 | 松下电器产业株式会社 | Sealed compressor |
| CN105102817A (en) * | 2013-04-10 | 2015-11-25 | 克诺尔商用车制动系统有限公司 | Device for conserving power in a piston compressor |
| CN108506189A (en) * | 2017-02-24 | 2018-09-07 | 株式会社前川制作所 | Piston for compressor, compressor and heat pump unit |
| CN108571437A (en) * | 2018-05-31 | 2018-09-25 | 上海朗旦制冷技术有限公司 | A kind of opposed type linear compressor piston |
| CN115306676A (en) * | 2022-07-26 | 2022-11-08 | 黄石东贝压缩机有限公司 | Telescopic boss piston and working method thereof |
-
2007
- 2007-08-07 CN CNU2007200733794U patent/CN201096070Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776059A (en) * | 2010-03-08 | 2010-07-14 | 上海英范特冷暖设备有限公司 | Structure for improving efficiency of piston type air compressor |
| CN102777348A (en) * | 2011-05-09 | 2012-11-14 | 松下电器产业株式会社 | Sealed compressor |
| US9518571B2 (en) | 2011-05-09 | 2016-12-13 | Panasonic Intellectual Property Management Co., Ltd. | Sealed compressor |
| CN105102817A (en) * | 2013-04-10 | 2015-11-25 | 克诺尔商用车制动系统有限公司 | Device for conserving power in a piston compressor |
| CN105102817B (en) * | 2013-04-10 | 2017-02-22 | 克诺尔商用车制动系统有限公司 | Device for conserving power in a piston compressor |
| US10072653B2 (en) | 2013-04-10 | 2018-09-11 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Device for conserving power in a piston compressor |
| CN108506189A (en) * | 2017-02-24 | 2018-09-07 | 株式会社前川制作所 | Piston for compressor, compressor and heat pump unit |
| CN108571437A (en) * | 2018-05-31 | 2018-09-25 | 上海朗旦制冷技术有限公司 | A kind of opposed type linear compressor piston |
| CN115306676A (en) * | 2022-07-26 | 2022-11-08 | 黄石东贝压缩机有限公司 | Telescopic boss piston and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI KENA ELECTRICAL APPLIANCES MACHINE CO., L Free format text: FORMER NAME OR ADDRESS: SHANGHAI ZANUXI ELECTRICAL AND MECHANICAL CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Shanghai city Ba Sheng Pudong New Area Waigaoqiao Free Trade Zone No. 160, zip code: 200131 Patentee after: Shanghai Kena Electrical Machinery Co.,Ltd. Address before: Shanghai city Ba Sheng Pudong New Area Waigaoqiao Free Trade Zone No. 160, zip code: 200131 Patentee before: Shanghai Zanuxi Electrical and Mechanical Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20120807 |