US20190383278A1 - Discharge valve and compressor having the same - Google Patents

Discharge valve and compressor having the same Download PDF

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Publication number
US20190383278A1
US20190383278A1 US16/084,290 US201716084290A US2019383278A1 US 20190383278 A1 US20190383278 A1 US 20190383278A1 US 201716084290 A US201716084290 A US 201716084290A US 2019383278 A1 US2019383278 A1 US 2019383278A1
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United States
Prior art keywords
discharge
valve
hook
valve casing
compressor
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Abandoned
Application number
US16/084,290
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English (en)
Inventor
Yeol Woo Sung
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Hanon Systems Corp
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Hanon Systems Corp
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Assigned to HANON SYSTEMS reassignment HANON SYSTEMS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUNG, YEOL WOO
Publication of US20190383278A1 publication Critical patent/US20190383278A1/en
Abandoned legal-status Critical Current

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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
    • F04B27/0804—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 rotary cylinder block
    • F04B27/0821—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 rotary cylinder block component parts, details, e.g. valves, sealings, lubrication
    • F04B27/0839—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 rotary cylinder block component parts, details, e.g. valves, sealings, lubrication valve means, e.g. valve plate
    • 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
    • F04B25/00—Multi-stage pumps
    • F04B25/04—Multi-stage pumps having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • 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
    • 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
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • 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
    • F04B39/102—Adaptations or arrangements of distribution members the members being disc 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/18—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
    • F04B1/182—Check 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • F16K15/028—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open the valve member consisting only of a predominantly disc-shaped flat element

Definitions

  • the present disclosure relates to a discharge valve and a compressor having the same, and more particularly, to a discharge valve that can be prevented from being separated due to back pressure by pressing the discharge valve against a discharge gasket, and a compressor having the same.
  • a compressor serving to compress a refrigerant in a vehicle cooling system has been developed in various forms.
  • the compressor include a reciprocating compressor configured such that its component compresses a refrigerant while reciprocating, and a rotary compressor configured such that its component compresses a refrigerant while rotating.
  • examples of the reciprocating compressor include a crank compressor that transmits driving force from a drive source to a plurality of pistons using a crank, a swash plate compressor that transmits driving force from a drive source to a rotary shaft having a swash plate installed thereto, and a wobble plate compressor that uses a wobble plate.
  • examples of the rotary compressor include a vane rotary compressor that uses a rotary shaft and a vane, and a scroll compressor that uses an orbiting scroll and a fixed scroll.
  • examples of the swash plate compressor include a fixed-capacity swash plate compressor, in which the installation angle of a swash plate is fixed, and a variable-capacity swash plate compressor capable of changing a discharge capacity by changing the angle of inclination of a swash plate.
  • FIG. 1 illustrates an example of a typical swash plate compressor.
  • the configuration of the swash plate compressor will be schematically described below with reference to FIG. 1 .
  • the swash plate compressor 10 (hereinafter, referred to as “compressor”) includes a cylinder block 20 defining a portion of the external appearance and frame thereof.
  • a center bore 21 is formed through the center of the cylinder block 20 , and a rotary shaft 60 is rotatably installed in the center bore 21 .
  • a plurality of cylinder bores 22 is formed through the cylinder block 20 to radially surround the center bore 21 , and a piston 70 is installed in each of the cylinder bores 22 so as to be capable of rectilinearly reciprocating.
  • the piston 70 has a cylindrical shape
  • the cylinder bore 22 is a cylindrical space corresponding thereto
  • the refrigerant in the cylinder bore 22 is compressed by the reciprocating motion of the piston 70 .
  • a front housing 30 is coupled to the front of the cylinder block 20 .
  • the front housing 30 forms a crank chamber 31 therein together with the cylinder block 20 by tensioning the surface of the front housing 30 facing the cylinder block 20 .
  • a pulley 32 which is connected to an external power source (not shown) such as an engine, is rotatably installed in front of the front housing 30 , and the rotary shaft 60 rotates along with the rotation of the pulley 32 .
  • a rear housing 40 is coupled to the rear of the cylinder block 20 .
  • discharge chambers 41 are formed in the rear housing 40 along a portion adjacent to the outer peripheral edge of the rear housing 40 to selectively communicate with the cylinder bores 22 .
  • An inlet 43 and a suction chamber 42 in which the fluid sucked thereinto stays, are installed at any positions of the rear housing 40 , but they may also be installed at different positions according to the type of the compressor. That is, their installation is not necessarily limited to the above positions.
  • a discharge gasket 50 is interposed between the cylinder block 20 and the rear housing 40 , and each of the discharge chambers 41 communicates with an associated one of the cylinder bores 22 through a discharge port 51 formed in the discharge gasket 50 .
  • a swash plate 61 is installed on the rotary shaft 60 .
  • the swash plate 61 is connected to the individual pistons 70 by shoes 62 arranged along the edge of the swash plate 61 , and the pistons 70 rectilinearly reciprocate in the cylinder bores 22 by the rotation of the swash plate 61 .
  • the swash plate 61 is installed such that the angle thereof to the rotary shaft 60 is variable, thereby enabling the discharge amount of refrigerant in the compressor 10 to be regulated.
  • the opening degree of a passage which allows the discharge chamber 41 to communicate with the crank chamber 31 , is adjusted by a pressure regulation valve (not shown).
  • the conventional swash plate compressor having the above configuration has a so-called radial symmetry structure in which the cylinder bores 22 formed in the cylinder block 20 are radially spaced about the rotary shaft 60 ,
  • FIG. 2 is a cross-sectional view illustrating an example of a conventional rear housing 40 .
  • discharge chambers 41 are arranged along the outer circumference of the rear housing 40 and a suction chamber 42 is disposed in the center of the rear housing 40 .
  • a suction check valve 80 is mounted to the suction chamber 42 .
  • a discharge valve 90 is disposed on each of the discharge chambers 41 .
  • the discharge valve 90 is provided to prevent a compressed fluid from flowing backward toward the discharge chamber 41 due to a difference in pressure when a compressor is stopped after the compressed fluid is introduced into a discharge pipe.
  • the discharge valve 90 allows the pressure of a compressed fluid to be kept relatively uniform when the compressed fluid is discharged, thereby bringing about an effect of relieving noise and vibration when the compressor operates.
  • FIG. 3 is a view illustrating an example of an existing discharge valve 90 .
  • the conventional discharge valve 90 is press-fitted to a fluid outlet 45 in a discharge chamber 41 .
  • the discharge valve 90 has a press-fitting portion 91 made of a metal material such as copper or aluminum, and is fixed by forcibly press-fitting the press-fitting portion 91 to a stepped portion 46 .
  • the discharge valve 90 has a structure in which a compressed air flows toward the outlet 45 through the opening 93 while a core (not shown) is pushed rearward by the discharge hydraulic pressure of the compressed air.
  • a core not shown
  • the core is closed by moving forward again when the discharge hydraulic pressure is lowered since the discharge valve 90 has a spring (not shown) therein.
  • the structure of the discharge valve 90 which is capable of further reducing costs by eliminating the press-fitting portion 91 , made of a metal material, therefrom while the discharge valve 90 is stably fixed to the outlet 45 to enable the function of the discharge valve 90 to be performed.
  • the present disclosure has been made in view of the above-mentioned problems, and an object thereof is to provide a discharge valve that can be prevented from being separated due to back pressure by pressing the discharge valve against a discharge gasket, and a compressor having the same.
  • a discharge valve for compressors includes a valve casing having a hook formed around one side thereof such that the hook is seated on a discharge port of a rear housing, a first opening formed at a center of the one side for introduction of a compressed fluid, and a second opening formed around the other side thereof for discharge of the compressed fluid, a core body disposed within the valve casing, an elastic body disposed to touch one side of the core body, and a support block mounted to the other side of the valve casing to support the elastic body.
  • the hook may include a first hook disposed around the one side of the valve casing, and a second hook disposed around the one side of the valve casing at a position facing the first hook.
  • the first hook may have a greater length than the second hook.
  • the first and second hooks may have different length.
  • the first hook may include a first piece having a flat inner surface and a round outer surface, and a first support bar disposed between one surface of the valve casing and an inner surface of the first piece to support the first piece.
  • the second hook may include a second piece having a flat inner surface and a round outer surface, and a second support bar disposed between one surface of the valve casing and an inner surface of the second piece to support the second piece.
  • the discharge valve may further include a recessed groove formed along a central circumference of the valve casing, and a sealing unit disposed in the recessed groove to be pressed against an inner surface of the outlet.
  • valve casing, the core body, and the support block may be made of plastic.
  • a compressor in accordance with another aspect of the present disclosure, includes a valve plate provided with a discharge gasket having a discharge port through which a compressed fluid is discharged, a rear housing connected to the valve plate and having a discharge chamber connected to the discharge port, and a discharge valve disposed on the discharge chamber and including first and second hooks having different lengths corresponding to the shape of the discharge gasket.
  • This fixing structure can also be made of a plastic material, and is to change a conventional method of fixing a discharge valve by press-fitting a component, which is made of a metal material such as copper or aluminum, to a discharge port. Therefore, it is possible to reduce product costs and simultaneously maintain a separation prevention function as in the related art.
  • FIG. 1 is a side cross-sectional view illustrating a swash plate compressor.
  • FIG. 2 is a view illustrating a discharge valve disposed at a discharge port in a conventional cylinder block
  • FIG. 3 is a view illustrating a fixed state of a conventional discharge valve.
  • FIG. 4 is a side view illustrating a discharge valve according to the present disclosure.
  • FIG. 5 is an exploded perspective view of the discharge valve illustrated in
  • FIG. 4 is a diagrammatic representation of FIG. 4 .
  • FIG. 6 is a view illustrating a state in which the discharge valve of the present disclosure is mounted to a discharge port of a cylinder block.
  • FIG. 7 is a view illustrating a fixed state of the discharge valve according to the present disclosure.
  • FIG. 4 is a side view illustrating a discharge valve according to the present disclosure.
  • FIG. 5 is an exploded perspective view of the discharge valve illustrated in FIG. 4
  • FIG. 6 is a view illustrating a state in which the discharge valve of the present disclosure is mounted to a discharge port of a cylinder block
  • FIG. 7 is a view illustrating a fixed state of the discharge valve according to the present disclosure.
  • the swash plate compressor which is designated by reference numeral 10 , includes a cylinder block 20 defining a portion of the external appearance and frame thereof.
  • a center bore 21 is formed through the center of the cylinder block 20 , and a rotary shaft 60 is rotatably installed in the center bore 21 .
  • a plurality of cylinder bores 22 is formed through the cylinder block 20 to radially surround the center bore 21 , and a piston 70 is installed in each of the cylinder bores 22 so as to be capable of rectilinearly reciprocating.
  • the piston 70 has a cylindrical shape
  • the cylinder bore 22 is a cylindrical space corresponding thereto
  • the refrigerant in the cylinder bore 22 is compressed by the reciprocating motion of the piston 70 .
  • a front housing 30 is coupled to the front of the cylinder block 20 .
  • the front housing 30 forms a crank chamber 31 therein together with the cylinder block 20 by tensioning the surface of the front housing 30 facing the cylinder block 20 .
  • a pulley 32 which is connected to an external power source (not shown) such as an engine, is rotatably installed in front of the front housing 30 , and the rotary shaft 60 rotates along with the rotation of the pulley 32 .
  • a rear housing 800 is coupled to the rear of the cylinder block 20 , as illustrated in FIGS. 6 and 7 .
  • the general external appearance of the rear housing 800 is similar to that of a rear housing 40 illustrated in FIG. 1 , the present disclosure is necessarily limited thereto.
  • discharge chambers 810 are formed in the rear housing 800 along a portion adjacent to the outer peripheral edge of the rear housing 800 to selectively communicate with the cylinder bores 22 .
  • an inlet (not shown) is formed at one side of the rear housing 800 , and is connected to a suction chamber (not shown; which is similar to that designated by reference numeral 42 of FIG. 2 but the present disclosure is not necessarily limited thereto) disposed at the center of the rear housing 800 .
  • a suction chamber (not shown; which is similar to that designated by reference numeral 42 of FIG. 2 but the present disclosure is not necessarily limited thereto) disposed at the center of the rear housing 800 .
  • the present disclosure is not necessarily limited thereto, and they may also be installed at different positions according to the type of the compressor.
  • a valve plate 50 is interposed between the cylinder block 20 and the rear housing 800 , and each of the discharge chambers 810 communicates with an associated one of the cylinder bores 22 through a discharge port 51 formed in the valve plate 50 .
  • a swash plate 61 is installed on the rotary shaft 60 .
  • the swash plate 61 is connected to the individual pistons 70 by shoes 62 arranged along the edge of the swash plate 61 , and the pistons 70 rectilinearly reciprocate in the cylinder bores 22 by the rotation of the swash plate 61 .
  • the swash plate 61 is installed such that the angle thereof to the rotary shaft 60 is variable, thereby enabling the discharge amount of refrigerant in the compressor 10 to be regulated.
  • the opening degree of a passage which allows the discharge chamber 810 to communicate with the crank chamber 31 , is adjusted by a pressure regulation valve (not shown).
  • the conventional swash plate compressor having the above configuration has a so-called radial symmetry structure in which the cylinder bores 22 formed in the cylinder block 20 are radially spaced about the rotary shaft 60 .
  • the discharge valve for compressors which is designated by reference numeral 100 , according to the present disclosure may include a valve casing 210 , a core body 300 , an elastic body 400 , and a support block 500 .
  • the valve casing 210 , the core body 300 , and the support block 500 may be made of a plastic material for cost reduction.
  • the valve casing 210 may have a hook 211 , 216 formed around one side 250 thereof such that the hook 211 , 216 is seated on the discharge chamber 810 of the rear housing 800 , and a first opening 230 formed at the center of the one side 250 thereof for introduction of a compressed fluid.
  • the valve casing 210 may have a second opening 240 formed around the other side 260 thereof for discharge of the compressed fluid.
  • the core body 300 may be disposed in the other side 260 of the valve casing 210 .
  • the core body 30 is disposed in the state in which one end thereof touches the first opening 230 and the circumference thereof touches the second opening 240 .
  • the core body 300 has an internal groove 310 formed in the other end thereof, and the elastic body 400 is inserted into the internal groove 310 for arrangement.
  • the elastic body 400 may be a coil spring, but the present disclosure is not necessarily limited thereto.
  • the support block 500 has a protrusion 510 formed at the center thereof.
  • the protrusion 510 is inserted into the elastic body 400 for arrangement to support the elastic body 400 and functions to guide the extension and contraction direction of the elastic body 400 .
  • the support block 500 has an extension 520 extending radially from the outer circumference thereof.
  • the hook 211 , 216 may include a first hook 211 disposed around the one side 250 of the valve casing 210 , and a second hook 216 disposed around the one side 250 of the valve casing 210 at a position facing the first hook 211 .
  • the first hook 211 may consist of a first piece 212 and a first support bar 213 .
  • the first piece 212 may have a flat inner surface and a round outer surface.
  • the first support bar 213 is disposed between one surface of the valve casing 210 and the inner surface of the first piece 212 and functions to support the first piece 212 .
  • the second hook 216 may consist of a second piece 217 and a second support bar 218 .
  • the second piece 217 may have a flat inner surface and a round outer surface.
  • the second support bar 218 is disposed between one surface of the valve casing 210 and the inner surface of the second piece 217 and functions to support the second piece 217 .
  • the first hook 211 may have a greater length than the second hook 216 . This is to support one end of the second hook 216 by a discharge gasket 700 .
  • a first round groove 860 and a second round groove 870 are formed on an outlet 850 in the discharge chamber 810 so as to correspond to the outer peripheral surfaces of the first and second pieces 212 and 217 , and thus the valve casing 210 in inserted into the outlet 850 for arrangement.
  • the first hook 211 is positioned at the first round groove 860 formed in the outside of the discharge chamber 810 and the second hook 216 is positioned at the second round groove 870 formed in the inside of the discharge chamber 810 .
  • the discharge gasket 700 is disposed at the upper portion of the discharge chamber 810
  • the discharge gasket 700 is seated on one end of the first hook 211
  • a gasket block 710 forming a discharge port 720 is seated on one end of the second hook 216 , as illustrated in FIG. 7 .
  • the first and second hooks 211 and 216 have different lengths corresponding to the shape of the discharge gasket 700 .
  • the end of the one side 250 of the valve casing 210 is adapted and fitted to a stepped portion 830 of the outlet 850 when assembling the valve casing 210 . Then, when assembling the discharge gasket 700 , one surface of the discharge gasket 700 presses the first hook 211 formed at the one side 250 of the valve casing 210 and the gasket block 710 presses the second hook 216 for arrangement.
  • both ends of the one side 250 of the valve casing 210 are naturally pressed and fixed by the discharge gasket 710 , the gasket block 710 , and the stepped portion 830 . Therefore, the valve casing 210 can be prevented from being separated toward the discharge chamber 810 due to back pressure generated in the direction of the outlet 850 when the compressor is stopped.
  • the difference in height between the first hook 211 and the second hook 216 may be set in various manners according to the design specifications of the discharge gasket 700 and the gasket block 710 .
  • the discharge valve 100 of the present disclosure may further include a recessed groove 220 and a sealing unit 600 .
  • the recessed groove 220 may be formed along the central circumference of the valve casing 210 .
  • the sealing unit 600 may be disposed in the recessed groove 220 to be pressed against the inner surface of the outlet 850 , in order to prevent the leakage of a fluid to the gap between the valve casing 210 and the outlet 850 .
  • the sealing unit 600 may be made of an elastic material such as rubber or silicon.
  • the sealing unit 600 may be an O-ring, but the present disclosure is not necessarily limited thereto.
  • the fixing force of the valve casing 210 onto the outlet 850 can be further enhanced by friction force.
  • the fluid compressed by the piston (not shown) of the compressor is introduced into the discharge chamber 810 through the discharge port 720 , and then collected in the direction of the outlet 850 disposed on the discharge chamber 810 for discharge.
  • a certain hydraulic pressure is required to push the core body 300 of the discharge valve 100 , which is a force against the restoring force of the elastic body 400 .
  • the required hydraulic pressure is formed, the fluid introduced through the first opening 230 while the core body 300 is pushed flows toward the outlet 850 by bypassing in the direction of the second opening 240 .
  • the fluid may flow back in the direction of the compressor due to back pressure since the pressure in a discharge pipe (not shown) is higher than that in the compressor when the compressor is stopped.
  • the separation of the discharge valve due to back pressure is prevented by forcibly press-fitting a press-fitting portion, which is made of a metal material such as copper or aluminum, to a stepped portion.
  • a press-fitting portion which is made of a metal material such as copper or aluminum
  • the overall valve casing 210 is made of a plastic material for cost reduction, and a press-fitting force is reduced by a change in the material.
  • the separation of the discharge valve may occur due to a back flow when press-fitting force is reduced.
  • the valve casing 210 is disposed in such a manner that one end of the discharge valve is supported by the discharge gasket 700 and the sealing unit 600 is fitted to the stepped portion 830 of the outlet 850 as well. Through such a structure, the separation prevention effect can be maintained similar to the arrangement of the conventional press-fitting portion.
  • the present disclosure relates to a discharge valve and a compressor having the same.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US16/084,290 2017-03-07 2017-07-14 Discharge valve and compressor having the same Abandoned US20190383278A1 (en)

Applications Claiming Priority (3)

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KR1020170028968A KR20180102391A (ko) 2017-03-07 2017-03-07 압축기의 배출 밸브 및 이를 포함하는 압축기
KR10-2017-0028968 2017-03-07
PCT/KR2017/007612 WO2018164323A1 (ko) 2017-03-07 2017-07-14 압축기의 배출 밸브 및 이를 포함하는 압축기

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KR (1) KR20180102391A (ko)
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Citations (3)

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Publication number Priority date Publication date Assignee Title
US4723896A (en) * 1987-04-30 1988-02-09 White Consolidated Industries, Inc. Compressor discharge valve assembly
US6435848B1 (en) * 1999-06-07 2002-08-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable capacity type compressor with check valve
US20170002808A1 (en) * 2015-07-01 2017-01-05 Lg Electronics Inc. Compressor

Family Cites Families (5)

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