EP1288497A2 - Sealing mechanism for compressor - Google Patents
Sealing mechanism for compressor Download PDFInfo
- Publication number
- EP1288497A2 EP1288497A2 EP02019231A EP02019231A EP1288497A2 EP 1288497 A2 EP1288497 A2 EP 1288497A2 EP 02019231 A EP02019231 A EP 02019231A EP 02019231 A EP02019231 A EP 02019231A EP 1288497 A2 EP1288497 A2 EP 1288497A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- sealing mechanism
- compressor
- cylinder block
- plates
- 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.)
- Withdrawn
Links
Images
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
- 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
-
- 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
Definitions
- the present invention relates to a compressor having a valve plate assembly located in a housing, which includes a cylinder block and a cylinder head. Particularly, the present invention pertains to a sealing mechanism between adjoining sections of the cylinder block and the cylinder head.
- Japanese Laid-Open Utility Model Publication No. 56-113186 discloses a sealing mechanism including a gasket.
- the gasket is fitted to a valve plate assembly.
- the diameter of the gasket is greater than the diameter of any valve plate in the valve plate assembly.
- the outer portion of the gasket protrudes from the valve plate assembly.
- the protruding portion is located between the adjoining sections of the cylinder block and the cylinder head. The protruding portion seals the adjoining sections of the cylinder block and the cylinder head.
- Japanese Laid-Open Patent Publication No. 10-176669 discloses another sealing mechanism.
- the outer portion of a valve plate assembly is located between a cylinder block and a cylinder head.
- the valve plate assembly includes a first plate and a second plate. Rubber coating is formed on both end surfaces of the first and second plates.
- the first plate seals the adjoining sections of the cylinder block and the valve plate assembly.
- the second plate seals the adjoining sections of the valve plate assembly and the cylinder head.
- the sealing mechanism of prior art (1) requires a dedicated gasket (plate) for sealing the adjoining sections of the cylinder block and the cylinder head, which increases the number of parts in the compressor.
- the gasket also increases the thickness of the group of plates located between the cylinder block and the cylinder head, which increases the axial size of the compressor.
- the present invention provides a sealing mechanism for a compressor.
- the compressor has a housing and a valve plate assembly.
- the valve plate assembly is located in the housing.
- the housing has a cylinder block and a cylinder head.
- the cylinder block and the cylinder head are connected with each other.
- the valve plate assembly has a plurality of plates.
- the sealing mechanism has a seal portion.
- the seal portion is a peripheral portion of one of the plates that extends radially outward in the compressor relative to the other plates.
- the seal portion seals a peripheral section between the cylinder block and the cylinder head.
- a double-headed piston swash plate type compressor according to a preferred embodiment of the present invention will be described with reference to Figs. 1 and 2.
- the compressor forms part of a refrigeration cycle of a vehicular air conditioning system.
- the swash plate type compressor includes a front cylinder block 11, a rear cylinder block 12, a front cylinder head 13, and a rear cylinder head 14.
- the front cylinder block 11 and the rear cylinder block 12 are adjacent to each other.
- the left end of the compressor in Fig. 1 is defined as the front of the compressor, and the right end is defined as the rear of the compressor.
- the front cylinder head 13 is secured to the front end face of the front cylinder block 11 with a front valve plate assembly 15 in between.
- the rear cylinder head 14 is secured to the rear end face of the rear cylinder block 12 with a rear valve plate assembly 16 in between.
- the front cylinder block 11, the rear cylinder block 12, the front cylinder head 13, the rear cylinder head 14 are fastened together with bolts 17 (only one is shown) and form the housing of the compressor.
- a bearing 18 is located in the front cylinder block 11.
- a bearing 19 is located in the rear cylinder block 12.
- the bearings 18, 19 rotatably support a drive shaft 20, which extends through the cylinder blocks 11, 12.
- the drive shaft 20 is coupled to an external drive source, which is a vehicle engine (not shown) in this embodiment.
- the drive shaft 20 is rotated by power supplied by the engine.
- First cylinder bores 11a are formed in the front cylinder block 11.
- the first cylinder bores 11a surround the drive shaft 20.
- Second cylinder bores 12a are formed in the rear cylinder block 12.
- the second cylinder bores 12a surround the drive shaft 20.
- Each first cylinder bore 11a and one of the second cylinder bores 12a are aligned along an axis parallel to the drive shaft 20 and forms a pair.
- the compressor has several pairs of the cylinder bores 11a, 12a (only one is shown in Fig. 1).
- Each pair of the cylinder bores 11a, 12a accommodates a double-headed piston 21.
- Each piston 21 has two cylindrical heads 21a. The end face of each head 21a of each piston 21 and the corresponding one of the valve plate assemblies 15, 16 define a compression chamber 22.
- the front cylinder block 11 and the rear cylinder block 12 define a crank chamber 23 in between.
- a drive plate which is a swash plate 24 in this embodiment, is coupled to the drive shaft 20 and is located in the crank chamber 23.
- the swash plate 24 rotates integrally with the drive shaft 20.
- Each piston 21 has a pair of shoes 25 at an axial center, and is coupled to the peripheral portion of the swash plate 24 with the shoes 25. Rotation of the drive shaft 20 is converted into reciprocation of the pistons 21 by the swash plate 24 and the shoes 25.
- a dividing wall 13a projects from the inner surface of the front cylinder head 13 toward the front valve plate assembly 15.
- a dividing wall 14a projects from the inner surface of the rear cylinder head 14 toward the rear valve plate assembly 16.
- the distal end of the dividing wall 13a contacts the front valve plate assembly 15, which defines a suction chamber 26 and a discharge chamber 27 in the front cylinder head 13.
- the discharge chamber 27 is located about the suction chamber 26.
- the distal end of the dividing wall 14a contacts the rear valve plate assembly 16, which defines a suction chamber 26 and a discharge chamber 27 in the rear cylinder head 14.
- the discharge chamber 27 is located about the suction chamber 26.
- Each valve plate assembly 15, 16 includes suction ports 28 and suction valve flaps 30 for closing the suction ports 28.
- Each valve plate assembly 15, 16 also includes discharge ports 29 and discharge valve flaps 31 for closing the discharge ports 29.
- each valve plate assembly 15, 16 includes a retainer 32. When opened, the discharge valve flaps 31 contact the retainer 32, which defines the maximum opening degree of the discharge valve flaps 31.
- Refrigerant gas is drawn into each suction chamber 26 from an external refrigerant circuit (not shown).
- the refrigerant is drawn into the corresponding compression chamber 22 through the corresponding suction port 28 while flexing the suction valve flap 30.
- refrigerant in the corresponding compression chamber 22 is compressed to a certain pressure.
- the compressed gas is then discharged to the discharge chamber 27 through the corresponding discharge port 29 while flexing the discharge valve flap 31.
- the discharged gas is supplied to the external refrigerant circuit from the discharge chamber 27.
- valve plate assemblies 15, 16 The structure of the valve plate assemblies 15, 16 and the sealing mechanism of the compressor using the valve plate assemblies 15, 16 will now be described. Since the front valve plate assembly 15 has the same structure as that of the rear valve plate assembly 16, only the explanation of the rear valve plate assembly 16 will be given, and the explanation of the front valve plate assembly 15 will be omitted.
- Fig. 2 is an enlarged image of a portion encircled by broken line in Fig 1.
- the valve plate assembly 16 includes a main plate 41, a first plate 42 located between the main plate 41 and the rear cylinder block 12, a second plate 43 located between the main plate 41 and the rear cylinder head 14, and a retainer plate 44 located between the second plate 43 and the rear cylinder head 14.
- the main plate 41 is made of, for example, a metal such as SPCC.
- the suction ports 28 and the discharge ports 29 are formed in the main plate 41.
- the first plate 42 is made of, for example, a metal such as hardened carbon steel.
- the suction valve flaps 30, which are reed valves, are integrally formed with the first plate 42.
- the second plate 43 is made of, for example, a metal such as stainless steel.
- the discharge valve flaps 31, which are reed valves, are integrally formed with the second plate 43.
- the retainer plate 44 is made of, for example, a metal such as SPCC.
- the retainers 32 are integrally formed with the retainer plate 44. The retainers 32 bulge into the discharge chamber 27.
- a rubber layer 46 is formed between the retainer plate 44 and the rear cylinder head 14. The distal end of the dividing wall 14a contacts the retainer plate 44. Accordingly, the rubber layer 46 seals the suction chamber 26 and the discharge chamber 27 from each other.
- a rubber layer 47 is formed on each of the front end face and the rear end face of the first plate 42. That is, the first plate 42 has sealing function with rubber coatings and thus functions as a gasket.
- the peripheral portion of the first plate 42 is extended outward compared to the plates 41, 43, 44 in the radial direction of the compressor.
- the projecting peripheral portion forms an annular rim.
- the rim and the corresponding portions of the rubber layers 47 form a seal portion 45.
- the seal portion 45 is located between the adjoining peripheral sections of the rear cylinder block 12 and the rear cylinder head 14 and seals the adjoining peripheral sections.
- the front valve plate assembly 15 has a first plate 42 with a seal portion 45.
- the seal portion 45 seals the adjoining peripheral sections of the front cylinder block 11 and the front cylinder head 13.
- the rubber layers 47 may be formed on both sides of any one of the plates 41, 43, 44 other than the first plate 42.
- the peripheral portion of the one of the plates 41, 43, 44 on which the rubber layers 47 are formed is radially extended outward than the other plates 41 to 44.
- the projected portion functions as the seal portion 45.
- the seal portion 45 in each of the embodiments of Figs. 3 to 5 is located between each cylinder block 11, 12 and the corresponding cylinder head 13, 14.
- the main plate 41 seals the adjoining peripheral sections of each cylinder block 11, 12 and the corresponding cylinder head 13, 14.
- the second plate 43 seals the adjoining peripheral sections of each cylinder block 11, 12 and the corresponding cylinder head 13, 14.
- the retainer plate 44 seals the adjoining peripheral sections of each cylinder block 11, 12 and the corresponding cylinder head 13, 14. Particularly, in the embodiment of Fig. 4, the adjoining peripheral sections of each cylinder block 11, 12 and the cylinder head 13, 14 are effectively sealed for the reason mentioned in the advantage (3) of the embodiment shown in Fig. 2.
- the rubber layers 47 are formed only on both sides of the retainer plate 44.
- the rubber layers 47 seal the adjoining peripheral sections of each cylinder block 11, 12 and the corresponding cylinder head 13, 14.
- the rubber layers 47 also scal the suction chamber 26 and the discharge chamber 27 from each other. Therefore, the embodiment of Fig. 5 further reduces the cost of the sealing mechanism.
- the rubber layers 47 may be formed only on the seal portion 45. This reduces the amount of rubber used in the compressor. However, forming rubber layers on the entire end faces of the plates 41 to 44 as illustrated in Figs. 1 to 5 is easier than forming rubber layers on part (peripheral portion) of the plates 41 to 44. Forming rubber layers on the entire end faces of the plates 41 to 44 eliminates spaces between each adjacent pair of the plates 41 to 44 and stabilizes the plates 41 to 44.
- the sealing material is not limited to rubber. However, resin or soft metal may be used.
- each retainer 32 need not be located in the corresponding valve plate assembly 15, 16.
- the maximum opening degree of each discharge valve flap 31 may be defined by contact between the discharge valve flaps 31 and the inner wall of the corresponding cylinder head 13, 14.
- the retainer plates 44 may be omitted and the structure of the valve plate assemblies 15, 16 is simplified.
- the dividing wall 13a, 14a of each cylinder head 13, 14 contacts the corresponding second plate 43. If the retainer plates 44 are omitted from the embodiments of Figs. 2 and 3, a rubber coating is formed on the end face of each second plate 43 that faces the corresponding cylinder head 13, 14 to seal the suction chamber 26 and the discharge chamber 27 from each other.
- the adjoining peripheral sections of the front cylinder block 11 and the front cylinder head 13 may be sealed by a different one of the plates 41 to 44 from the plate that seals the adjoining peripheral sections of the rear cylinder block 12 and the rear cylinder head 14.
- the peripheral adjoining sections of the front cylinder block 11 and the front cylinder head 13 may be sealed by the first plate 42 of the front valve plate assembly 15, and the peripheral adjoining sections of the rear cylinder block 12 and the rear cylinder head 14 may be sealed by the second plate 43 of the rear valve plate assembly 16.
- the present invention may be embodied in the sealing mechanism of a single-headed piston type compressor.
- the present invention may be embodied in the sealing mechanism of a wobble plate type compressor.
- the present invention may be embodied in the sealing mechanism of a wave cam type compressor having a wave cam instead of a swash plate.
- the wave cam functions as a drive plate.
Abstract
A sealing mechanism is used for a compressor. The
compressor has a housing, a valve plate assembly (15, 16)
located in the housing. The housing has a cylinder block (11,
12) and a cylinder head (13, 14). The cylinder block (11, 12)
and the cylinder head (13, 14) are connected with each other.
The valve plate assembly (15, 16) has a plurality of plates
(41-44). The sealing mechanism has a seal portion (45). The
seal portion (45) is a peripheral portion of one of the plates
(41-44) that extends radially outward in the compressor
relative to the other plates (41-44). The seal portion (45)
seals a peripheral section between the cylinder block (11, 12)
and the cylinder head (13, 14). This provides an inexpensive
and simple sealing mechanism of the compressor.
Description
- The present invention relates to a compressor having a valve plate assembly located in a housing, which includes a cylinder block and a cylinder head. Particularly, the present invention pertains to a sealing mechanism between adjoining sections of the cylinder block and the cylinder head.
- Japanese Laid-Open Utility Model Publication No. 56-113186 (prior art (1)) discloses a sealing mechanism including a gasket. The gasket is fitted to a valve plate assembly. The diameter of the gasket is greater than the diameter of any valve plate in the valve plate assembly. The outer portion of the gasket protrudes from the valve plate assembly. The protruding portion is located between the adjoining sections of the cylinder block and the cylinder head. The protruding portion seals the adjoining sections of the cylinder block and the cylinder head.
- Japanese Laid-Open Patent Publication No. 10-176669 (prior art (2)) discloses another sealing mechanism. In this structure, the outer portion of a valve plate assembly is located between a cylinder block and a cylinder head. The valve plate assembly includes a first plate and a second plate. Rubber coating is formed on both end surfaces of the first and second plates. The first plate seals the adjoining sections of the cylinder block and the valve plate assembly. The second plate seals the adjoining sections of the valve plate assembly and the cylinder head.
- The sealing mechanism of prior art (1) requires a dedicated gasket (plate) for sealing the adjoining sections of the cylinder block and the cylinder head, which increases the number of parts in the compressor. The gasket also increases the thickness of the group of plates located between the cylinder block and the cylinder head, which increases the axial size of the compressor.
- In the sealing mechanism of prior art (2), the rubber coating needs to be formed on both end surfaces of the first and second plates. The cost of the sealing mechanism is thus increased.
- Accordingly, it is an objective of the present invention to provide an inexpensive and simple sealing mechanism of a compressor.
- To achieve the above objective, the present invention provides a sealing mechanism for a compressor. The compressor has a housing and a valve plate assembly. The valve plate assembly is located in the housing. The housing has a cylinder block and a cylinder head. The cylinder block and the cylinder head are connected with each other. The valve plate assembly has a plurality of plates. The sealing mechanism has a seal portion. The seal portion is a peripheral portion of one of the plates that extends radially outward in the compressor relative to the other plates. The seal portion seals a peripheral section between the cylinder block and the cylinder head.
- Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
- The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
- Fig. 1 is a cross-sectional view illustrating a double-headed piston type variable displacement compressor according to a preferred embodiment of the present invention;
- Fig. 2 is an enlarged cross-sectional view showing a part surrounded by a circle of a broken line in Fig. 1;
- Fig. 3 is an enlarged cross-sectional view illustrating a compressor according to another embodiment;
- Fig. 4 is an enlarged cross-sectional view illustrating a compressor according to another embodiment; and
- Fig. 5 is an enlarged cross-sectional view illustrating a compressor according to another embodiment.
-
- A double-headed piston swash plate type compressor according to a preferred embodiment of the present invention will be described with reference to Figs. 1 and 2. The compressor forms part of a refrigeration cycle of a vehicular air conditioning system.
- As shown in Fig. 1, the swash plate type compressor includes a
front cylinder block 11, arear cylinder block 12, afront cylinder head 13, and arear cylinder head 14. Thefront cylinder block 11 and therear cylinder block 12 are adjacent to each other. The left end of the compressor in Fig. 1 is defined as the front of the compressor, and the right end is defined as the rear of the compressor. - The
front cylinder head 13 is secured to the front end face of thefront cylinder block 11 with a frontvalve plate assembly 15 in between. Therear cylinder head 14 is secured to the rear end face of therear cylinder block 12 with a rearvalve plate assembly 16 in between. Thefront cylinder block 11, therear cylinder block 12, thefront cylinder head 13, therear cylinder head 14 are fastened together with bolts 17 (only one is shown) and form the housing of the compressor. - A
bearing 18 is located in thefront cylinder block 11. Abearing 19 is located in therear cylinder block 12. Thebearings drive shaft 20, which extends through thecylinder blocks drive shaft 20 is coupled to an external drive source, which is a vehicle engine (not shown) in this embodiment. Thedrive shaft 20 is rotated by power supplied by the engine. -
First cylinder bores 11a (only one is shown in Fig. 1) are formed in thefront cylinder block 11. The first cylinder bores 11a surround thedrive shaft 20.Second cylinder bores 12a (only one is shown in Fig. 1) are formed in therear cylinder block 12. The second cylinder bores 12a surround thedrive shaft 20. Each first cylinder bore 11a and one of thesecond cylinder bores 12a are aligned along an axis parallel to thedrive shaft 20 and forms a pair. The compressor has several pairs of thecylinder bores - Each pair of the cylinder bores 11a, 12a accommodates a double-
headed piston 21. Eachpiston 21 has twocylindrical heads 21a. The end face of eachhead 21a of eachpiston 21 and the corresponding one of thevalve plate assemblies compression chamber 22. - The
front cylinder block 11 and therear cylinder block 12 define acrank chamber 23 in between. A drive plate, which is aswash plate 24 in this embodiment, is coupled to thedrive shaft 20 and is located in thecrank chamber 23. Theswash plate 24 rotates integrally with thedrive shaft 20. Eachpiston 21 has a pair ofshoes 25 at an axial center, and is coupled to the peripheral portion of theswash plate 24 with theshoes 25. Rotation of thedrive shaft 20 is converted into reciprocation of thepistons 21 by theswash plate 24 and theshoes 25. - A dividing
wall 13a projects from the inner surface of thefront cylinder head 13 toward the frontvalve plate assembly 15. A dividingwall 14a projects from the inner surface of therear cylinder head 14 toward the rearvalve plate assembly 16. The distal end of the dividingwall 13a contacts the frontvalve plate assembly 15, which defines asuction chamber 26 and adischarge chamber 27 in thefront cylinder head 13. Thedischarge chamber 27 is located about thesuction chamber 26. The distal end of the dividingwall 14a contacts the rearvalve plate assembly 16, which defines asuction chamber 26 and adischarge chamber 27 in therear cylinder head 14. Thedischarge chamber 27 is located about thesuction chamber 26. - Each
valve plate assembly suction ports 28 and suction valve flaps 30 for closing thesuction ports 28. Eachvalve plate assembly discharge ports 29 and discharge valve flaps 31 for closing thedischarge ports 29. Further, eachvalve plate assembly retainer 32. When opened, the discharge valve flaps 31 contact theretainer 32, which defines the maximum opening degree of the discharge valve flaps 31. - Refrigerant gas is drawn into each
suction chamber 26 from an external refrigerant circuit (not shown). As eachpiston 21 moves from the top dead center position to the bottom dead center position in relation to one of thesuction chambers 26, the refrigerant is drawn into the correspondingcompression chamber 22 through the correspondingsuction port 28 while flexing thesuction valve flap 30. When eachpiston 21 moves from the bottom dead center position to the top dead center position in relation to one of thedischarge chambers 27, refrigerant in the correspondingcompression chamber 22 is compressed to a certain pressure. The compressed gas is then discharged to thedischarge chamber 27 through thecorresponding discharge port 29 while flexing thedischarge valve flap 31. The discharged gas is supplied to the external refrigerant circuit from thedischarge chamber 27. - The structure of the
valve plate assemblies valve plate assemblies valve plate assembly 15 has the same structure as that of the rearvalve plate assembly 16, only the explanation of the rearvalve plate assembly 16 will be given, and the explanation of the frontvalve plate assembly 15 will be omitted. - Fig. 2 is an enlarged image of a portion encircled by broken line in Fig 1. As shown in Fig. 2, the
valve plate assembly 16 includes amain plate 41, afirst plate 42 located between themain plate 41 and therear cylinder block 12, asecond plate 43 located between themain plate 41 and therear cylinder head 14, and aretainer plate 44 located between thesecond plate 43 and therear cylinder head 14. - The
main plate 41 is made of, for example, a metal such as SPCC. Thesuction ports 28 and thedischarge ports 29 are formed in themain plate 41. Thefirst plate 42 is made of, for example, a metal such as hardened carbon steel. The suction valve flaps 30, which are reed valves, are integrally formed with thefirst plate 42. Thesecond plate 43 is made of, for example, a metal such as stainless steel. The discharge valve flaps 31, which are reed valves, are integrally formed with thesecond plate 43. Theretainer plate 44 is made of, for example, a metal such as SPCC. Theretainers 32 are integrally formed with theretainer plate 44. Theretainers 32 bulge into thedischarge chamber 27. - A
rubber layer 46 is formed between theretainer plate 44 and therear cylinder head 14. The distal end of the dividingwall 14a contacts theretainer plate 44. Accordingly, therubber layer 46 seals thesuction chamber 26 and thedischarge chamber 27 from each other. - A
rubber layer 47 is formed on each of the front end face and the rear end face of thefirst plate 42. That is, thefirst plate 42 has sealing function with rubber coatings and thus functions as a gasket. The peripheral portion of thefirst plate 42 is extended outward compared to theplates seal portion 45. Theseal portion 45 is located between the adjoining peripheral sections of therear cylinder block 12 and therear cylinder head 14 and seals the adjoining peripheral sections. - Like the rear
valve plate assembly 16, the frontvalve plate assembly 15 has afirst plate 42 with aseal portion 45. Theseal portion 45 seals the adjoining peripheral sections of thefront cylinder block 11 and thefront cylinder head 13. - The embodiment of Figs. 1 and 2 provides the following advantages.
- (1) The adjoining peripheral sections of the peripheral
portions of each
cylinder block corresponding cylinder head first plate 42. Therefore, no dedicated sealing plate is required, and the number of parts in the compressor is reduced. Also, the embodiment of the Figs. 1 and 2 reduces the thickness of the group of plates between eachcylinder block corresponding cylinder head drive shaft 20. - (2) The peripheral portion of each
first plate 42 radially protrudes outward in relation to theother plates valve plate assembly first plate 42 is located between the peripheral portions of each pair of thecylinder block cylinder head cylinder block corresponding cylinder head first plate 42 needs to be coated with rubber, which reduces the cost of the sealing mechanism. - (3) Since reed valves (the suction valves 30) are
integrally formed with each
first plate 42, thefirst plates 42 are more likely to elastically deform compared to themain plates 41. That is, thefirst plates 42 are made of thinner or more flexible material. Therefore, theseal portion 45 of eachfirst plate 42 is elastically deformed to compensate for machining errors in the peripheral portions of thecorresponding cylinder block corresponding cylinder head - (4) The sealing mechanism of the embodiment shown in
Figs. 1 and 2 is used in the double-head piston type
compressor. The double-headed piston type compressor has two
sets of adjoining peripheral sections of the cylinder blocks
11, 12 and the cylinder heads 13, 14. The compressor also has
the two
valve plate assemblies -
- It should be apparent to those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention. Particularly, it should be understood that the invention may be embodied in the following forms.
- As shown in modified embodiments of Figs. 3 to 5, the rubber layers 47 may be formed on both sides of any one of the
plates first plate 42. The peripheral portion of the one of theplates other plates 41 to 44. The projected portion functions as theseal portion 45. Theseal portion 45 in each of the embodiments of Figs. 3 to 5 is located between eachcylinder block corresponding cylinder head - In Fig. 3, the
main plate 41 seals the adjoining peripheral sections of eachcylinder block corresponding cylinder head second plate 43 seals the adjoining peripheral sections of eachcylinder block corresponding cylinder head retainer plate 44 seals the adjoining peripheral sections of eachcylinder block corresponding cylinder head cylinder block cylinder head retainer plate 44. The rubber layers 47 seal the adjoining peripheral sections of eachcylinder block corresponding cylinder head suction chamber 26 and thedischarge chamber 27 from each other. Therefore, the embodiment of Fig. 5 further reduces the cost of the sealing mechanism. - In the embodiments of Figs. 1 to 5, the rubber layers 47 may be formed only on the
seal portion 45. This reduces the amount of rubber used in the compressor. However, forming rubber layers on the entire end faces of theplates 41 to 44 as illustrated in Figs. 1 to 5 is easier than forming rubber layers on part (peripheral portion) of theplates 41 to 44. Forming rubber layers on the entire end faces of theplates 41 to 44 eliminates spaces between each adjacent pair of theplates 41 to 44 and stabilizes theplates 41 to 44. - The sealing material is not limited to rubber. However, resin or soft metal may be used.
- Each
retainer 32 need not be located in the correspondingvalve plate assembly discharge valve flap 31 may be defined by contact between the discharge valve flaps 31 and the inner wall of thecorresponding cylinder head retainer plates 44 may be omitted and the structure of thevalve plate assemblies wall cylinder head second plate 43. If theretainer plates 44 are omitted from the embodiments of Figs. 2 and 3, a rubber coating is formed on the end face of eachsecond plate 43 that faces thecorresponding cylinder head suction chamber 26 and thedischarge chamber 27 from each other. - The adjoining peripheral sections of the
front cylinder block 11 and thefront cylinder head 13 may be sealed by a different one of theplates 41 to 44 from the plate that seals the adjoining peripheral sections of therear cylinder block 12 and therear cylinder head 14. For example, the peripheral adjoining sections of thefront cylinder block 11 and thefront cylinder head 13 may be sealed by thefirst plate 42 of the frontvalve plate assembly 15, and the peripheral adjoining sections of therear cylinder block 12 and therear cylinder head 14 may be sealed by thesecond plate 43 of the rearvalve plate assembly 16. - The present invention may be embodied in the sealing mechanism of a single-headed piston type compressor.
- The present invention may be embodied in the sealing mechanism of a wobble plate type compressor.
- The present invention may be embodied in the sealing mechanism of a wave cam type compressor having a wave cam instead of a swash plate. The wave cam functions as a drive plate.
- Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive and the invention is not to be limited to the details given herein, but may be modified within the scope and equivalence of the appended claims.
Claims (9)
- A sealing mechanism for a compressor, wherein the compressor has a housing, a valve plate assembly (15, 16) located in the housing, wherein the housing has a cylinder block (11, 12) and a cylinder head (13, 14), wherein the cylinder block (11, 12) and the cylinder head (13, 14) are connected with each other, wherein the valve plate assembly (15, 16) has a plurality of plates (41-44), the sealing mechanism being characterized by:a seal portion (45), wherein the seal portion (45) is a peripheral portion of one of the plates (41-44) that extends radially outward in the compressor relative to the other plates (41-44), and wherein the seal portion (45) seals a peripheral section between the cylinder block (11, 12) and the cylinder head (13, 14).
- The sealing mechanism according to claim 1, characterized in that the cylinder block (11, 12) has a cylinder bore (11a, 12a), wherein the valve plate assembly (15, 16) has a first plate (42), a main plate (41), and a second plate (43), wherein the first plate (42) has a suction valve flap (30), which is opened when gas is drawn in the cylinder bore (11a, 12a), wherein the main plate (41) has a suction port (28) and a discharge port (29) to permit the gas to pass there through, and wherein the second plate (43) has a discharge valve flap (31), which is opened when the gas is discharged from the cylinder bore(11a, 12a).
- The sealing mechanism according to claim 2, characterized in that the valve plate assembly (15, 16) has a retainer plate (44), which restricts the opening of the discharge valve flap (31).
- The sealing mechanism according to claim 2, characterized in that the seal portion (45) is located in one of the first plate (42) and the second plate (43).
- The sealing mechanism according to claim 3, characterized in that the seal portion (45) is located in the retainer plate (44).
- The sealing mechanism according to any one of claims 1 to 5, characterized in that the seal portion (45) is formed by coating at least part of the peripheral surface of one of the plates (41-44) with seal material.
- The sealing mechanism according to claim 6, characterized in that the seal material is coated substantially on the entire surface of the one of the plates (41-44).
- The sealing mechanism according to any one of claims 1 to 7, characterized in that the compressor is double-headed piston type compressor.
- A compressor having the sealing mechanism according to any one of claims 1 to 8.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001257949 | 2001-08-28 | ||
JP2001257949A JP2003065232A (en) | 2001-08-28 | 2001-08-28 | Seal structure of compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1288497A2 true EP1288497A2 (en) | 2003-03-05 |
Family
ID=19085542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02019231A Withdrawn EP1288497A2 (en) | 2001-08-28 | 2002-08-27 | Sealing mechanism for compressor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20030044294A1 (en) |
EP (1) | EP1288497A2 (en) |
JP (1) | JP2003065232A (en) |
KR (1) | KR20030019127A (en) |
CN (1) | CN1401902A (en) |
BR (1) | BR0203477A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1517038A2 (en) * | 2003-09-18 | 2005-03-23 | Zexel Valeo Compressor Europe GmbH | Compressor sealing system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6899199B2 (en) * | 2002-10-24 | 2005-05-31 | Barnes Group Inc. | Flapper finger valve assembly |
JP2005344625A (en) * | 2004-06-03 | 2005-12-15 | Zexel Valeo Climate Control Corp | Compressor |
JP2006002716A (en) * | 2004-06-21 | 2006-01-05 | Zexel Valeo Climate Control Corp | Sealing structure for compressor |
US20060016483A1 (en) * | 2004-07-20 | 2006-01-26 | Barnes Group Inc. | Valve or valve plate having an integrated gasket |
IN2015MN00116A (en) | 2012-07-23 | 2015-10-16 | Emerson Climate Technologies | |
CN104662300B (en) | 2012-07-23 | 2018-01-26 | 艾默生环境优化技术有限公司 | Injection molding seal for compressor |
CN106286230B (en) * | 2016-10-17 | 2018-10-19 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of compressor and its valve plate |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4416190A (en) * | 1979-12-13 | 1983-11-22 | Diesel Kiki Co., Ltd. | Seal for compressor |
JPH01182580A (en) * | 1988-01-13 | 1989-07-20 | Sanden Corp | Variable displacement oscillating compressor |
JPH0640389U (en) * | 1992-10-28 | 1994-05-27 | サンデン株式会社 | Discharge valve device of compressor |
JPH09250451A (en) * | 1996-03-19 | 1997-09-22 | Sanden Corp | Piston for variable displacement rocking swash plate type compressor |
JP3757580B2 (en) * | 1996-11-25 | 2006-03-22 | 株式会社豊田自動織機 | Compressor |
JPH11343974A (en) * | 1998-05-29 | 1999-12-14 | Toyota Autom Loom Works Ltd | Reciprocating compressor |
KR100363930B1 (en) * | 1999-04-01 | 2002-12-11 | 가부시키가이샤 도요다 지도숏키 | The positioning structure of valve forming body in compressor |
KR100389013B1 (en) * | 2000-01-11 | 2003-06-25 | 가부시키가이샤 도요다 지도숏키 | Piston-type compressor and method for assembling the same |
JP2002115657A (en) * | 2000-10-05 | 2002-04-19 | Toyota Industries Corp | Cylinder of piston compressor |
-
2001
- 2001-08-28 JP JP2001257949A patent/JP2003065232A/en active Pending
-
2002
- 2002-08-27 BR BR0203477-8A patent/BR0203477A/en not_active IP Right Cessation
- 2002-08-27 CN CN02132185A patent/CN1401902A/en active Pending
- 2002-08-27 EP EP02019231A patent/EP1288497A2/en not_active Withdrawn
- 2002-08-27 US US10/229,422 patent/US20030044294A1/en not_active Abandoned
- 2002-08-27 KR KR1020020050737A patent/KR20030019127A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1517038A2 (en) * | 2003-09-18 | 2005-03-23 | Zexel Valeo Compressor Europe GmbH | Compressor sealing system |
EP1517038A3 (en) * | 2003-09-18 | 2009-07-22 | Valeo Compressor Europe GmbH | Compressor sealing system |
Also Published As
Publication number | Publication date |
---|---|
US20030044294A1 (en) | 2003-03-06 |
BR0203477A (en) | 2003-05-20 |
CN1401902A (en) | 2003-03-12 |
KR20030019127A (en) | 2003-03-06 |
JP2003065232A (en) | 2003-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100419260C (en) | Inclined plate-type compressors and air conditioning systems including such compressors | |
US6231315B1 (en) | Compressor having a value plate and a gasket | |
US5533871A (en) | Single-headed-piston-type swash-plate compressor having pulsation damping system | |
US6454545B1 (en) | Compressor | |
EP1288497A2 (en) | Sealing mechanism for compressor | |
US6722666B2 (en) | Seal structure for use in housing of compressor | |
US5782613A (en) | Piston type compressor with structure for reducing cylinder bore deformation | |
US6186514B1 (en) | Gasket for sealing a refrigerant compressor | |
EP1236896B1 (en) | Compressor piston | |
JPH1026077A (en) | Double piston type compressor | |
JPH10196536A (en) | Deterioration preventing structure of sealing member in reciprocating compressor | |
US6634868B2 (en) | Compressor | |
JP2001132629A (en) | Swash plate compressor | |
JP2002070739A (en) | Reciprocating refrigerating compressor | |
JPH09177670A (en) | Piston type compressor | |
EP1462651A1 (en) | Piston compressor | |
JP3069736B1 (en) | Gas compressor | |
US20080063550A1 (en) | Piston type compressor | |
KR101487025B1 (en) | Compressor | |
JPH09273478A (en) | Piston type compressor | |
US20050031477A1 (en) | Discharge valve mechanism in compressor | |
JP2005188328A (en) | Piston type compressor | |
JP2003293950A (en) | Seal structure for compressor | |
US20070134102A1 (en) | Piston compressor | |
JP2014125994A (en) | Piston type compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020827 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20050301 |