EP2183483A1 - Kältemittelverdichter - Google Patents
KältemittelverdichterInfo
- Publication number
- EP2183483A1 EP2183483A1 EP08785112A EP08785112A EP2183483A1 EP 2183483 A1 EP2183483 A1 EP 2183483A1 EP 08785112 A EP08785112 A EP 08785112A EP 08785112 A EP08785112 A EP 08785112A EP 2183483 A1 EP2183483 A1 EP 2183483A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outlet opening
- valve
- refrigerant compressor
- cylinder head
- compressor according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002826 coolant Substances 0.000 title abstract description 4
- 239000003507 refrigerant Substances 0.000 claims description 57
- 238000005192 partition Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 description 17
- 230000006378 damage Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1081—Casings, housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1009—Distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
Definitions
- the invention relates to a refrigerant compressor according to the preamble of claim 1.
- Refrigerant compressor of the type mentioned here are known. They are used in particular for controlling the temperature of a passenger compartment in motor vehicles. They have a shaft and at least one preferably arranged parallel to the shaft piston, which is displaceably mounted in a cylinder bore.
- the piston cooperates with a valve device comprising a pressure valve, a valve plate and a suction valve.
- the refrigerant which is sucked by the piston from a suction area via the suction valve, for example CO 2 in a CO 2 refrigerant compressor is ejected in a direction of the valve means by the pressure valve in a pressure chamber during movement of the piston in the cylinder bore.
- the pressure chamber is limited on the one hand by the pressure valve and on the other hand by a portion of a cylinder head.
- at least one outlet opening is provided, through which the pressurized refrigerant can be conducted out of the pressure chamber.
- a refrigerant compressor which has the features mentioned in claim 1. It is characterized in that a Abdeckverhindernseinrich- device is provided against a complete covering the least one outlet opening.
- This embodiment has the advantage that broken valve fingers of the pressure valve can not completely cover the outlet opening, so that a malfunction of the refrigerant compressor and in particular the destruction of the cylinder head is avoided by broken valve fingers.
- a refrigerant compressor which is characterized in that the Abdeckverhinders observed is formed on at least one provided on the pressure valve valve finger and / or on the cylinder head.
- a refrigerant compressor which is characterized in that the geometry of the pressure valve and the geometry of the outlet opening are matched to one another for the realization of the Abdeckverhinderns observed.
- a cover prevention device is provided which avoids complete covering of the outlet opening.
- the immediate vicinity of the at least one outlet opening is uneven.
- at least one depression is provided, which is inserted into the outlet Opening opens.
- This embodiment has the advantage that, in the case of an outlet opening obscured by a broken-off valve finger, the refrigerant which is still under pressure through the recesses can still escape from the pressure chamber through the outlet opening.
- at least one elevation preferably adjacent to the outlet opening, is provided. In this way, it is prevented that a valve finger part of a broken valve finger can completely cover the outlet opening, because the aborted part is inclined over the outlet opening by the elevation, so that a refrigerant flow from the pressure chamber into the outlet opening is ensured.
- the at least one elevation is formed integrally with the cylinder head.
- a refrigerant compressor which is characterized in that at least two elevations are provided, between which flow channels arise. In this embodiment, too, it is ensured that a broken off valve finger part can not completely cover the outlet opening, but merely comes to lie on the at least two elevations. Between the elevations flow channels continue to ensure a refrigerant flow, so that an increased pressure build-up in the pressure chamber is prevented.
- a refrigerant compressor which is characterized in that the at least one outlet opening in addition to the end wall is partially introduced into a lateral partition wall delimiting the pressure chamber. Even with this configuration, a broken piece of a valve finger can not completely cover the outlet opening, since a region of the outlet opening, which is introduced in the partition, forms a flow channel, which maintains the flow of refrigerant at all times.
- At least one pin is provided in the immediate vicinity of the outlet opening, which realizes a cover prevention device.
- the pin is pressed into the outlet portion having wall portion of the cylinder head.
- a refrigerant compressor is preferred, which is characterized in that the valve fingers have protruding elements.
- the valve fingers have protruding elements.
- a cover prevention device is again provided, which ensures that in the case of a breakage of such a valve finger, the outlet opening is not completely covered but that the valve finger part is supported on the protruding elements on the wall portion of the cylinder head and thus a flow channel between the outlet opening and the valve finger remains.
- Figure 1 is a schematic representation of a pressure valve section
- Figure 2 is a perspective view of a cylinder head with a first embodiment of a cover prevention device
- Figure 3 is a plan view of the cylinder head of Figure 2;
- Figure 4 is a sectional view taken along a section line A-A according to Figure 3;
- FIG. 5 shows a plan view of a cylinder head with a cover prevention device according to a further exemplary embodiment
- Figure 6 is a sectional view taken along section line A-A according to Figure 5;
- Figure 7 is a sectional view of another embodiment of a Abdeckverhinders vigorous.
- FIG. 8 shows a perspective view of a Abdeckverhinde- tion device according to a further embodiment.
- FIG. 1 shows a partial section of a pressure valve 3 having a plurality of valve fingers 1.
- the outer end 5 of the valve fingers 1 covers openings of a valve plate, not shown here, which connects the pressure chamber arranged in a cylinder head to the cylinder bore, not shown, which receives a piston. If the piston, for example, triggered by the pivoting movement of a pivoting element, moves in the direction of the valve device, the coolant in the cylinder bore moves. tel, for example CO 2 in a CO 2 refrigerant compressor, compressed. Due to the increased pressure of the compressed refrigerant, the valve fingers 1, or their outer ends 5, lifted from the valve plate, so that compressed refrigerant can pass through the openings from the cylinder bore into the pressure chamber.
- valve finger 1 Due to the high pressure on the valve fingers during the ejection process of refrigerant, it may happen that the pressure on a valve finger 1 is too large, and this breaks off at a break point 7.
- the break point may be at different locations along the valve finger.
- Figure 2 is a perspective view of a cylinder head 9 having a cover preventing means A according to a first embodiment of the present invention.
- the cylinder head 9 cooperates with a valve device, not shown here, as well as with a likewise not shown cylinder block of a refrigerant compressor.
- the cylinder head 9 has a pressure chamber 11 and a suction region 13, which are separated from each other by means of a lateral partition wall 15.
- the cylinder head 9 is preferably made of a single casting. It is placed on the valve device quasi, whereby the pressure chamber 11 is limited by the valve means not shown, by a wall portion 17 and finally by an edge region 19 of the cylinder head 9.
- an outlet opening 21 is provided which is located in the pressure chamber 11, below Pressurized refrigerant, such as CO 2 , can flow out of the pressure chamber 11.
- At least one elevation 23 Adjacent to the at least one outlet opening 21, according to a first embodiment, at least one elevation 23 is provided, here three in total.
- a complete covering of the outlet opening 21 is thus reliably prevented by the elevations 23.
- the elevations 23 are preferably formed integrally with the cylinder head 9, that is, for example, cast in one piece with the cylinder head 9. This allows a particularly simple and cost-effective realization of a cover prevention device A for preventing complete covering of the at least one outlet opening 21 by a broken valve finger 1.
- elevations 23 it is likewise conceivable to provide recesses, not illustrated here, in the wall section 17 of the cylinder head 9, which open into the at least one outlet opening 21.
- a corresponding dimensioning of the recesses in the wall section 17 then offers the same advantage as surveys 23, so that in the case of a cover of the outlet opening 21 through the recesses, it is ensured that the cooling medium flow is not completed and thus an enormous overpressure in the pressure chamber 11 is prevented, which can destroy the cylinder head 9.
- a depression is preferably designed such that it is larger than a valve finger 1.
- a cover prevention device A for preventing a complete covering of an outlet opening 21 is thus generally to make the immediate surroundings of the outlet opening uneven, so that a flat resting of a broken valve finger 1 on the outlet opening 21 is prevented. Due to the uneven formation of the immediate surroundings of the outlet opening 21, a broken valve finger 1 will be higher at one point than at another point, so that a flow channel results below which ensures the refrigerant flow from the pressure chamber 11 into the outlet opening 21.
- a cover prevention device A Decisive for the realization of a cover prevention device A is therefore that the geometry of the pressure valve or the valve finger 1 and the geometry of the at least one outlet opening 21 are matched to one another. This makes it possible in an advantageous manner to provide an effective anti-masking device A, which prevents complete covering of an outlet opening 21 and thus an overpressure in the pressure chamber 11 and which, moreover, can be realized cost-effectively.
- FIG. 3 shows a plan view of a cylinder head 9 with a cover prevention device A according to FIG. 2. Identical parts are provided with the same reference symbols, so that reference is made to the description of the preceding figures.
- the cover prevention device A can again be seen with elevations 23 and flow channels 25 formed therebetween, which ensure a flow of refrigerant from the pressure chamber 11 into the outlet opening 21.
- FIG. 4 shows a sectional illustration along the section line A-A according to FIG. 3.
- FIG. 4 again makes it clear that a broken-off valve finger 1 has no possibility of completely covering the outlet opening 21, but at most comes to lie on the elevations 23 or obliquely therebetween.
- the flow channels 25 can not be covered by a broken valve finger 1, so that a refrigerant flow is ensured by this.
- FIG. 5 shows a top view of a cylinder head 9 with a cover prevention device A according to a further exemplary embodiment of the refrigerant compressor. Identical parts are provided with the same reference numerals, so that in so far as reference is made to the preceding figures.
- FIG. 5 makes it clear that the cover prevention device A is realized here in that the outlet opening 21 is partially introduced into the lateral partition wall 15 between the pressure chamber 11 and the suction region 13, in particular in its edge region 19.
- FIG. 6 partially shows a section along the section line AA according to FIG. 5.
- outlet opening 21 is introduced in regions into the edge region 19 of the partition wall 15.
- a broken-off valve finger 1, which is conveyed by the refrigerant flowing through the outlet opening 21, can not completely come to lie on the outlet opening 21 by this embodiment of the cover preventing means A, since the area of the outlet opening 21 which is introduced into the partition wall 15 from the valve finger 1 can not be covered.
- the advantageous embodiment of the cover prevention device A shown here thus reliably prevents a broken valve finger 1 completely cover the outlet opening 21 and thus completely block a flow of refrigerant. This remains maintained by the formation of at least one flow channel 25 in the partition wall 15.
- FIG. 7 shows a further embodiment of a cover prevention device A.
- the same parts are provided with the same reference numerals, so that reference is made to the preceding figures.
- a region of a cylinder head 9 has the dividing wall 15, the pressure chamber 11 and the outlet opening 21.
- the Abdeckverhinders prepared A is here realized by means of at least one, here by means of two pins 27, preferably in the
- Cylinder head 9 are pressed.
- the pins 27 are preferably in arranged close to the at least one outlet opening 21 so that they particularly effectively prevent covering of the outlet opening 21 by a valve finger 1.
- a valve finger 1 can lay flat on the outlet opening 21 so that it is completely covered and a flow of refrigerant is thus completely interrupted. If a broken valve finger 1 lies on the pins 27 or obliquely therebetween, a flow channel 25 is formed which maintains the flow of refrigerant.
- the pins 27 realize a Abdeckverhinders worn A, in which the environment of the outlet opening 21 is uneven, so that a flat placing and thus a complete covering of the outlet opening 21 by a broken valve finger 1 is not possible.
- FIG 8 shows yet another embodiment of a Abdeckverhinders worn A.
- the same parts are provided with the same reference numerals, so that reference is made to the preceding figures.
- FIG. 8 shows a section of a valve finger 1 which has protruding elements 29, which are preferably aligned perpendicular to a plane E, in which the valve finger 1 lies.
- the elements 29 are aligned alternately to one and to the other side of the plane E.
- the elements 29 are formed integrally with the valve finger 1. If the valve finger 1 illustrated in FIG. 8 breaks off from the pressure valve 3 shown in FIG. 1, there is no possibility here that the valve finger 1 lay flat on the outlet opening 21 and thus can completely cover it. There are thus always areas between the individual protruding elements 29, which form flow channels 25, which ensure a flow of refrigerant from the pressure chamber into the outlet opening.
- the protruding elements 29 do not have to be oriented at right angles to the plane E, as shown in FIG. 8, but rather it is conceivable to align the protruding areas at a smaller angle or at a larger angle to the plane E.
- at least one flow channel 25 is formed which maintains the flow of refrigerant between the pressure chamber 11 and the outlet opening 21.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007040226 | 2007-08-25 | ||
PCT/EP2008/006160 WO2009027002A1 (de) | 2007-08-25 | 2008-07-25 | Kältemittelverdichter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2183483A1 true EP2183483A1 (de) | 2010-05-12 |
EP2183483B1 EP2183483B1 (de) | 2012-05-16 |
Family
ID=39859734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08785112A Active EP2183483B1 (de) | 2007-08-25 | 2008-07-25 | Kältemittelverdichter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2183483B1 (de) |
DE (1) | DE112008002025A5 (de) |
WO (1) | WO2009027002A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022113977A1 (de) | 2022-06-02 | 2023-12-07 | Zf Cv Systems Europe Bv | Pneumatisches Ventil und Verdichter |
DE102022122501A1 (de) | 2022-09-06 | 2024-03-07 | Zf Cv Systems Europe Bv | Ventil eines Kompressors oder einer Pumpe |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2302447A (en) * | 1941-08-30 | 1942-11-17 | Gen Electric | Compressor valve |
US3838942A (en) * | 1971-07-30 | 1974-10-01 | Mitchell J Co | Refrigeration compressor |
JPH03206373A (ja) * | 1990-01-09 | 1991-09-09 | Sanden Corp | 圧縮機の吐出弁機構 |
US5112198A (en) * | 1991-02-08 | 1992-05-12 | General Motors Corporation | Refrigerant compressor having variable restriction pressure pulsation attenuator |
JP3742862B2 (ja) * | 2003-03-05 | 2006-02-08 | ダイキン工業株式会社 | 圧縮機 |
KR100547465B1 (ko) * | 2004-02-26 | 2006-01-31 | 삼성광주전자 주식회사 | 밀폐형 압축기 |
-
2008
- 2008-07-25 WO PCT/EP2008/006160 patent/WO2009027002A1/de active Application Filing
- 2008-07-25 EP EP08785112A patent/EP2183483B1/de active Active
- 2008-07-25 DE DE112008002025T patent/DE112008002025A5/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2009027002A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE112008002025A5 (de) | 2010-07-29 |
EP2183483B1 (de) | 2012-05-16 |
WO2009027002A1 (de) | 2009-03-05 |
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