EP3330544A1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- EP3330544A1 EP3330544A1 EP17203559.4A EP17203559A EP3330544A1 EP 3330544 A1 EP3330544 A1 EP 3330544A1 EP 17203559 A EP17203559 A EP 17203559A EP 3330544 A1 EP3330544 A1 EP 3330544A1
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- EP
- European Patent Office
- Prior art keywords
- discharge
- discharge opening
- valve body
- pressure
- compressor
- 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.)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
Definitions
- the present invention relates to a compressor.
- a compressor for compressing a fluid such as a refrigerant is provided in an air conditioner, a refrigerator, or the like.
- a scroll compressor is configured to include a cylindrical housing body, a housing which includes an upper cover and a lower cover closing an upper opening and a lower opening of the housing body, a discharge cover which partitions the inside of the housing to form a discharge chamber on the upper side, a scroll compression mechanism which is accommodated in the housing and compresses a fluid such as a refrigerant introduced into the housing through a suction pipe by a revolution turning motion of a turning scroll with respect to a fixed scroll, and an electric motor and a rotary shaft for performing the turning scroll on the revolution turning motion (for example, refer to Patent Document 1 and Patent Document 2).
- a discharge port is formed to penetrate the discharge cover so as to cause a compression chamber (one side) on the scroll compression mechanism side and a discharge chamber (the other side) to communicate with each other.
- the scroll compressor includes a valve body and a discharge valve mechanism having the valve body, in which the valve body prevents a compressed fluid from flowing backward from the discharge chamber to the compression chamber by automatically opening and closing a discharge opening which opens to the discharge chamber side of the discharge cover according to a compression event during one rotation of the turning scroll, that is, according to a pressure difference between the compression chamber and the discharge chamber.
- the rotary shaft is rotated by the electric motor, the turning scroll of the scroll compression mechanism performs the revolution turning motion, and thus, the fluid such as the refrigerant introduced from the suction pipe into the housing is compressed in the compression chamber, and the compressed fluid (high-temperature and high-pressure compressed gas) is generated.
- the valve body (reed valve body) is pushed up by this pressure difference to open the discharge opening of the discharge port, and thus, the compressed fluid is ejected to the discharge chamber through the discharge port and the discharge opening to be fed to the discharge chamber.
- the compressed fluid is discharged to a refrigerating cycle side, to which the scroll compressor is connected, through the discharge pipe from the discharge chamber to be fed to the refrigerating cycle side.
- the reed valve body closes the discharge opening when the compression event ends.
- the pressure difference between the compression chamber on the one side and the discharge chamber on the other side decreases, and thus, a portion of the compressed fluid such as the refrigerant may instantaneously flow backward through a gap between the reed valve body and the discharge opening, and there is a concern that compression efficiency decreases due to the backflow of the compressed fluid.
- pressure pulsation is generated by the backflow of the compressed fluid such as a refrigerant, and thus, pulsating sound (noise) may be generated.
- the reed valve body is opened and closed according to the pressure difference between the compression chamber on the one side and the discharge chamber on the other side, and the compressed fluid is discharged in only one direction limited from the compression chamber to the discharge chamber. Accordingly, a choke flow is generated when the reed valve body opens the discharge opening to eject the compressed fluid from the discharge port to the discharge chamber, and thus, there is a concern that compression efficiency decreases.
- a compressor including: a discharge valve mechanism which, according to a pressure difference between one side and the other side communicating with each other through a discharge port, automatically opens and closes a discharge opening which opens to the other side of the discharge port, in which the discharge valve mechanism includes a valve body which is elastically deformed as a pressure of the one side is greater than a pressure of the other side to open the discharge opening and is returned to an original state as the pressure of the one side is less than or equal to the pressure of the other side to close the discharge opening, and a wall portion which protrudes from one surface of the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- the wall portion is disposed in a vortex flow generation region in which the discharge opening is opened and a compressed fluid discharged from the one side to the other side becomes a vortex flow.
- the valve body may be a reed valve body in which one end portion is fixed and the discharge opening is opened and is closed on the other end side, and a disposition and/or a height of the wall portion may be set according to a lift amount of the reed valve body in a longitudinal direction along the other end of the reed valve body from the one end thereof when the discharge opening is opened.
- the discharge valve mechanism may include a recessed portion which is recessed on one surface on the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- a compressor including: a discharge valve mechanism which, according to a pressure difference between one side and the other side communicating with each other through a discharge port, automatically opens and closes a discharge opening which opens to the other side of the discharge port, in which the discharge valve mechanism includes a valve body which is elastically deformed as a pressure of the one side is greater than a pressure of the other side to open the discharge opening and is returned to an original state as the pressure of the one side is less than or equal to the pressure of the other side to close the discharge opening, and a recessed portion which is recessed on one surface on the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- the wall portion and/or the recessed portion is provided around the discharge opening and the valve body. Accordingly, at the time of a valve close at which the valve body elastically deformed according to a pressure difference between the one side and the other side to open the discharge opening returns to the original state to close the discharge opening, a backflow of the compressed fluid instantaneously generated from the other side to the one side can be suppressed (prevented) by the wall portion or the recessed portion.
- the flow of the compressed fluid can be controlled by the wall portion or the recessed portion, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to prevent the decrease in the generation efficiency of the compressed fluid.
- FIGS. 1 to 8 a compressor according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8 .
- the compressor according to the present invention will be described as being a vertical type scroll compressor provided in an air conditioner, a refrigerator, or the like.
- a compressor A of the present embodiment is configured to include a housing 1, an electric motor 2 provided in the housing 1, and a scroll compression mechanism 3 which is provided in the housing 1 and compresses a fluid such as a refrigerant by driving of the electric motor 2.
- the housing 1 is formed to include a cylindrical housing body 1a, an upper cover 1b which closes an upper end opening of the housing body 1a, and a lower cover 1c which closes a lower end opening of the housing body 1a.
- a suction pipe 4 for supplying a fluid such as refrigerant from an accumulator or the like into the housing 1 is provided on a side surface of the housing body 1a, and a discharge pipe 5 for discharging the fluid compressed by the scroll compression mechanism 3 to the outside is provided on the upper cover 1b.
- the electric motor 2 includes a stator 6 and a rotor 7 and is configured to supply power from a power source to the stator 6 and rotate the rotor 7 in one direction around an axis O1 extending an up-down direction S1.
- a rotary shaft 8 is integrally attached to the rotor 7 such that the axis O1 direction is the up-down direction S1.
- An upper end side of the rotary shaft 8 in the axis O1 direction is pivotally supported by an upper bearing 10, a lower end side thereof in the axis O1 direction is pivotally supported by a lower bearing 11, and thus, the rotary shaft 8 is provided to rotate around the axis O1 according to the rotation of the rotor 7.
- the upper bearing 10 and the lower bearing 11 are each provided to be integrally fixed to the housing body 1a.
- An eccentric pin 12 which has an axis O2 oriented in the up-down direction S1 and is eccentric (offset) with respect to the axis O1 of the rotary shaft 8 is integrally provided on the upper end portion of the rotary shaft 8.
- the scroll compression mechanism 3 includes a fixed scroll 15, a turning scroll 16 which revolves around the fixed scroll 15, a discharge cover 17, and a discharge valve mechanism B.
- the fixed scroll 15 is formed to include a disk-shaped end plate 15a and a fixed lap 15b which protrudes downward from the lower surface of the end plate 15a and is spirally provided.
- the fixed scroll 15 is joined to the upper bearing 10 by a bolt or the like and is disposed to be fixed to the inside of the housing 1.
- a communication hole 18 which is formed to penetrate an upper surface of the end plate 15a from a lower surface thereof is provided in the fixed scroll 15.
- the turning scroll 16 is formed to include a disk-shaped end plate 16a and a turning lap 16b which protrudes upward from the upper surface of the end plate 16a and is spirally disposed.
- a boss 20 is integrally provided on a lower surface (rear surface) of the end plate 16a of the turning scroll 16, and a drive bush is assembled to the boss 20 via a bearing.
- the eccentric pin 12 is fitted into the drive bush. Accordingly, the turning scroll 16 is eccentrically connected to the rotary shaft 8, and is provided to rotate (revolve) with an eccentric distance from the axis (axis center) O1 of the rotary shaft 8 as a radius according to the rotation of the rotary shaft 8 around the axis O1.
- a rotation restraining member such as an Oldham ring is provided between the turning scroll 16 and the rotary shaft 8 such that the turning scroll 16 revolves and does not rotate.
- the fixed scroll 15 and the turning scroll 16 are disposed such that the fixed lap 15b and the turning lap 16b mesh with each other so as to overlap each other vertically.
- the fixed scroll 15 and the turning scroll 16 are eccentric to each other by a predetermined amount and are provided such that the fixed lap 15b and the turning lap 16b mesh with each other by shifting the phase by 180°.
- the fixed lap 15b and the turning lap 16b are disposed to come into contact with each other at a plurality of locations according to a rotation angle of the turning scroll 16.
- a portion between a lower surface of the fixed scroll 15 and an upper surface of the turning scroll 16, that is, a portion in which the fixed lap 15b and the turning lap 16b mesh with each other becomes a compression chamber 21 in which a fluid such as a refrigerant is compressed.
- the compression chamber 21 is formed point symmetrically with respect to the central portion (innermost peripheral portion) of the spiral of the fixed lap 15b and the turning lap 16b, the fluid gradually moves to the inner peripheral side while a volume of the fluid decreases according to the turning of the turning scroll 16, and thus, the fluid is compressed maximally at the center portion of the spiral.
- the discharge cover 17 is disposed above the fixed scroll 15 and is provided so as to divide the inside of the housing 1 into an upper discharge chamber 22 to which the discharge pipe 5 is connected and a lower space (compression chamber 21) to which the suction pipe 4 is connected.
- the discharge valve mechanism B of the present embodiment includes a discharge port 23 which is formed to penetrate an upper surface (one surface) of the discharge cover 17 from a lower surface thereof and causes the compression chamber 21 and the discharge chamber 22 to communicate with each other through a communication hole 18 formed to penetrate the end plate 15a of the fixed scroll 15, and a valve body 25 which opens and closes a circular discharge opening 24 formed so as to open to an upper surface (one surface) 17a of the discharge cover 17 of the discharge port 23 according to a pressure difference between the compression chamber 21 and the discharge chamber 22.
- the valve body 25 is a reed valve body, one end (base end) 25a side of the valve body 25 is fixed to the upper surface 17a of the discharge cover 17, and the other end (tip) 25b side thereof overlaps the discharge opening 24 in the up-down direction S1 to close the discharge opening 24.
- the valve body 25 has the one end 25a side which is a portion fixed to the discharge cover 17 as a supporting point, and when the pressure in the compression chamber 21 is equal to or less than the pressure in the discharge chamber 22, the other end 25b side closes the discharge opening 24.
- the valve body 25 is elastically deformed by the pressure difference with the one end 25a side which is a portion fixed to the discharge cover 17 as a supporting point, the other end 25b side is lifted upward to open the discharge opening 24, and thus, a compressed fluid R is fed from the compression chamber 21 to the discharge chamber 22 through the discharge opening 24.
- valve body 25 opens the discharge opening 24 to feed the compressed fluid R to the discharge chamber 22, and if the pressure in the compression chamber 21 is equal to or less than the pressure in the discharge chamber 22, the valve body 25 lowers the other end 25b side to the original state to close the discharge opening 24.
- valve body 25 automatically opens and closes the discharge opening 24 according to the pressure difference between the compression chamber 21 and the discharge chamber 22 to feed the compressed fluid R from the compression chamber 21 to the discharge chamber 22.
- the discharge cover 17 includes a valve seat 17b which protrudes upward from the upper surface (one surface) 17a of the discharge cover 17 to surround the circular discharge opening 24 and is connected in an annular shape, and a lower surface of the valve body 25 comes into close contact with an upper end of the valve seat 17b in the protrusion direction to close the discharge opening 24.
- a retainer 26 is provided, which has one end side is supported to be fixed to the discharge cover 17, is inclined upward toward the other end side, and overlap the valve body 25 and the discharge opening 24 above these.
- the retainer 26 abuts on the valve body 25 when the valve body 25 is elastically deformed by the pressure difference and is lifted up, and thus, regulates further lift-up of the valve body 25. That is, the retainer 26 is formed at a predetermined inclination angle from the one end side toward the other end side, and thus, is provided to regulate a lift amount at each position of the portions of the valve body 25, which are elastically deformed from the one end 25a side to the other end 25b and are lifted up, in a longitudinal direction S2.
- the discharge valve mechanism B of the present embodiment is configured such that the valve body 25 is not excessively deformed elastically when opening the discharging opening 24.
- the electric motor 2 is energized by the controller and a fluid such as a refrigerant is introduced into the housing 1 through the suction pipe 4.
- the rotary shaft 8 rotates, and the turning scroll 16 performs a revolution turning motion with respect to the fixed scroll 15. Accordingly, the fluid such as the refrigerant is compressed in the compression chamber 21 between the turning scroll 16 and the fixed scroll 15. In addition, the fluid is compressed by the revolution turning motion of the turning scroll 16, and the fluid is sequentially sucked from the suction pipe 4 into the housing 1, and from the outer peripheral portions of the turning scroll 16 and the fixed scroll 15 to the portion between the turning scroll 16 and the fixed scroll 15.
- the compressed fluid R which is compressed maximally in the compression chamber 21 formed at the center portion of the spiral flows through the communication hole 18 and the discharge port 23 to push up the valve body 25 of the discharge valve mechanism B, and the compressed fluid R is fed to be ejected into the discharge chamber 22 from the discharge opening 24 which is opened by pushing up the valve body 25.
- the compressed fluid R is discharged to an external refrigerant circuit or the like through the discharge pipe 5 from the discharge chamber 22. In this case, the fluid in the compression chamber 21 of the center portion of the spiral is discharged until the pressures in the compression chamber 21, the communication hole 18, and the discharge port 23 are balanced with the pressure in the discharge chamber 22.
- the valve body 25 is pushed down and the discharge opening 24 is automatically closed. Accordingly, until the operation of the compressor A is controlled to be stopped by the controller, the compressed fluid R having a predetermined pressure is generated by the revolution turning motion of the turning scroll 16 continued by the driving of the electric motor 2, and the discharge and the supply of the compressed fluid R with respect to the refrigerant circuit or the like are repeatedly performed.
- valve body 25 is gradually pushed down as the compressed fluid R is ejected from the discharge opening 24 and the pressure difference between the compression chamber 21 and the discharge chamber 22 decreases, and the discharge opening 24 is closed when the valve body 25 abuts on the valve seat 17b.
- a wall portion 30 which protrudes upward from the upper surface (one surface) 17a of the discharge cover 17 is provided around the discharge opening 24 and the valve body 25.
- the wall portion 30 is provided in a vortex flow generation region in which the compressed fluid R which flows through the discharge port 23 and is discharged from the discharge opening 24 becomes a vortex flow when the pressure in the compression chamber 21 is larger than the pressure in the discharge chamber 22 and the compressed fluid R is fed from the discharge opening 24 opened by the elastic deformation of the valve body 25 the discharge chamber 22.
- the wall portion 30 may be formed such that a height thereof is changed in the protrusion direction according to the positions around the discharge opening 24 and the valve body 25 to correspond the inclination angle of the valve body 25 elastically deformed by the pressure difference between the compression chamber 21 and the discharge chamber 22, that is, to correspond (for example, is in proportion with) the lift amount L of each position from the one end 25a side of the valve body 25 to the other end 25b thereof in the longitudinal direction S2.
- the wall portion 30 is not provided or the height of the wall portion 30 decreases in a portion where the backflow of the compressed fluid R is rarely generated (is not generated) or the vortex flow is rarely generated (is not generated).
- valve body 25 does not need to be constricted with respect to the portion on the other end 25b side and formed with a narrower width on the one end 25a side. That is, it is not particularly necessary to limit the shape of the valve body 25.
- the wall portion 30 is provided around the discharge opening 24 and the valve body 25, and thus, it is possible to suppress / prevent the occurrence of the backflow of the compressed fluid R (R') from the discharge chamber 22 to the compression chamber 21 by the wall portion 30 at a moment of valve closing at which the valve body 25 elastically deformed to open the discharge opening 24 returns the original state and the discharge opening 24 is closed.
- the flow of the compressed fluid R can be controlled by the wall portion 30, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R.
- the wall portion 30 is provided in the vortex flow generation region in which the compressed fluid R discharged from the discharge opening 24 becomes the vortex flow, and thus, it is possible to suppress / prevent the occurrence of the vortex flow of the compressed fluid R. Accordingly, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R caused by the occurrence of the vortex flow of the compressed fluid R.
- the wall portion 30 is not provided or the height of the wall portion 30 decreases in the portion where the backflow of the compressed fluid R is rarely generated (is not generated) or the vortex flow is rarely generated (is not generated), and thus, a pressure loss caused by providing the wall portion 30 is prevented, and the above-described effects can be realized.
- the present invention is not limited to the first embodiment and can be appropriately modified within a scope which does not departed from the gist.
- the compressor according to the present invention is a vertical type scroll compressor provided in an air conditioner, a refrigerator, or the like.
- the compressor of the present invention may be other type compressors such as a horizontal type scroll compressor or rotary compressor.
- the present invention may be any configuration as long as it includes the discharge valve mechanism B having the valve body 25 which opens and closes the discharge opening 24 of the discharge port 23 causing the one side 21 to communicate with the other side 22 and feeding the compressed fluid R by the pressure difference between the one side 21 and the other side 22 and the wall portion 30 for suppressing / preventing the occurrence of the backflow or the vortex flow of the compressor fluid R is provided in the discharge valve mechanism B, and particularly, there is no need to limit the type / the configuration for generating the compressed fluid R.
- the wall portion 30 is provided in the vortex flow generation region of the compressed fluid R.
- the wall portion 30 may be provided in the vicinity of the valve seat 17b on the other end 25b side of the valve body 25 or the like, that is, the wall portion 30 may be provided at a location at which the amount of the backflow of the compressed fluid R is large regardless of frequency of the occurrence of the vortex flow or presence or absence of the vortex flow (refer to Figs. 7 and 8 ).
- the side surface of the wall portion 30 may be formed in a multistage shape (stepwise shape) to more effectively suppress / prevent the occurrence of the backflow or the vortex flow.
- the compressor according to the present invention relates to the scroll compressor provided in an air conditioner or a refrigerator, and only a configuration of a discharge valve mechanism is different from that of the first embodiment. Accordingly, in the present embodiment, the same reference numerals are assigned to configurations similar to those of the first embodiment, and detail descriptions thereof are omitted.
- the compressor A of the present embodiment is configured to include the housing 1, the electric motor 2 provided in the housing 1, and the scroll compression mechanism 3 which is provided in the housing 1 and compresses a fluid such as a refrigerant by driving of the electric motor 2.
- the scroll compression mechanism 3 includes the fixed scroll 15, the turning scroll 16 which revolves around the fixed scroll 15, the discharge cover 17, and the discharge valve mechanism B.
- the discharge valve mechanism B of the present embodiment includes the discharge port 23 which is formed to penetrate the upper surface 17a of the discharge cover 17 from the lower surface thereof and causes the compression chamber 21 and the discharge chamber 22 to communicate with each other through the communication hole 18 formed to penetrate the end plate 15a of the fixed scroll 15, and the valve body 25 which opens and closes the circular discharge opening 24 formed so as to open to the upper surface 17a of the discharge cover 17 of the discharge port 23 according to the pressure difference between the compression chamber 21 and the discharge chamber 22.
- a recessed portion 31 which is recessed downward from the upper surface 17a of the discharge cover 17 is provided around the discharge opening 24 and the valve body 25.
- the recessed portion 31 may be formed such that a depth thereof is changed in the recessed direction according to the positions around the discharge opening 24 and the valve body 25 to correspond the inclination angle of the valve body 25 elastically deformed by the pressure difference between the compression chamber 21 and the discharge chamber 22, that is, to correspond (for example, is in proportion with) the lift amount L of each position from the one end 25a side of the valve body 25 to the other end 25b thereof in the longitudinal direction S2.
- the recessed portion 31 may not be provided or the depth of the recessed portion 31 may decrease in a portion where the backflow of the compressed fluid R is rarely generated (is not generated).
- the recessed portion 31 is provided around the discharge opening 24 and the valve body 25, and thus, it is possible to suppress / prevent the occurrence of the backflow of the compressed fluid R from the discharge chamber 22 to the compression chamber 21 by the recessed portion 31 at a moment of valve closing at which the valve body 25 elastically deformed to open the discharge opening 24 returns the original state and the discharge opening 24 is closed.
- the flow of the compressed fluid R can be controlled by the recessed portion 31, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R.
- the recessed portion 31 is not provided or the depth of the recessed portion 31 decreases in the portion where the backflow of the compressed fluid R is rarely generated (is not generated), and thus, a pressure loss caused by providing the recessed portion 31 is prevented, and the above-described effects can be realized.
- the present invention is not limited to the second embodiment, can include a modification example (a modification example similar to the modification example of the first embodiment) of the first embodiment, and can be appropriately modified within the scope which does not depart from the gist.
- the discharge valve mechanism B which includes the wall portion 30 of the first embodiment and the recessed portion 31 of the present embodiment may be configured.
- the wall portion 30 is provided on a T1 side and the recessed portion 31 is provided on a T2 side, the effects can be appropriately exerted.
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Abstract
Description
- The present invention relates to a compressor.
- A compressor for compressing a fluid such as a refrigerant is provided in an air conditioner, a refrigerator, or the like.
- In addition, a scroll compressor, a rotary compressor, or the like is applied to this kind of compressor.
- For example, a scroll compressor is configured to include a cylindrical housing body, a housing which includes an upper cover and a lower cover closing an upper opening and a lower opening of the housing body, a discharge cover which partitions the inside of the housing to form a discharge chamber on the upper side, a scroll compression mechanism which is accommodated in the housing and compresses a fluid such as a refrigerant introduced into the housing through a suction pipe by a revolution turning motion of a turning scroll with respect to a fixed scroll, and an electric motor and a rotary shaft for performing the turning scroll on the revolution turning motion (for example, refer to
Patent Document 1 and Patent Document 2). - In the discharge cover, a discharge port is formed to penetrate the discharge cover so as to cause a compression chamber (one side) on the scroll compression mechanism side and a discharge chamber (the other side) to communicate with each other. In addition, the scroll compressor includes a valve body and a discharge valve mechanism having the valve body, in which the valve body prevents a compressed fluid from flowing backward from the discharge chamber to the compression chamber by automatically opening and closing a discharge opening which opens to the discharge chamber side of the discharge cover according to a compression event during one rotation of the turning scroll, that is, according to a pressure difference between the compression chamber and the discharge chamber.
- In the scroll compressor, the rotary shaft is rotated by the electric motor, the turning scroll of the scroll compression mechanism performs the revolution turning motion, and thus, the fluid such as the refrigerant introduced from the suction pipe into the housing is compressed in the compression chamber, and the compressed fluid (high-temperature and high-pressure compressed gas) is generated.
- If a pressure in the compression chamber is higher than that in the discharge chamber, the valve body (reed valve body) is pushed up by this pressure difference to open the discharge opening of the discharge port, and thus, the compressed fluid is ejected to the discharge chamber through the discharge port and the discharge opening to be fed to the discharge chamber. In addition, for example, the compressed fluid is discharged to a refrigerating cycle side, to which the scroll compressor is connected, through the discharge pipe from the discharge chamber to be fed to the refrigerating cycle side.
- Patent Document 1: Japanese Unexamined Patent Application, First Publication No.
2014-040827 - Patent Document 2: Japanese Unexamined Patent Application, First Publication No.
2013-167215 - However, in the conventional compressor, the reed valve body closes the discharge opening when the compression event ends. However, when the reed valve body closes the valve, the pressure difference between the compression chamber on the one side and the discharge chamber on the other side decreases, and thus, a portion of the compressed fluid such as the refrigerant may instantaneously flow backward through a gap between the reed valve body and the discharge opening, and there is a concern that compression efficiency decreases due to the backflow of the compressed fluid.
- In addition, pressure pulsation is generated by the backflow of the compressed fluid such as a refrigerant, and thus, pulsating sound (noise) may be generated.
- Moreover, the reed valve body is opened and closed according to the pressure difference between the compression chamber on the one side and the discharge chamber on the other side, and the compressed fluid is discharged in only one direction limited from the compression chamber to the discharge chamber. Accordingly, a choke flow is generated when the reed valve body opens the discharge opening to eject the compressed fluid from the discharge port to the discharge chamber, and thus, there is a concern that compression efficiency decreases.
- According to an aspect of the present invention, there is provided a compressor including: a discharge valve mechanism which, according to a pressure difference between one side and the other side communicating with each other through a discharge port, automatically opens and closes a discharge opening which opens to the other side of the discharge port, in which the discharge valve mechanism includes a valve body which is elastically deformed as a pressure of the one side is greater than a pressure of the other side to open the discharge opening and is returned to an original state as the pressure of the one side is less than or equal to the pressure of the other side to close the discharge opening, and a wall portion which protrudes from one surface of the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- In addition, in the compressor of the present invention, preferably, the wall portion is disposed in a vortex flow generation region in which the discharge opening is opened and a compressed fluid discharged from the one side to the other side becomes a vortex flow.
- Moreover, in the compressor of the present invention, the valve body may be a reed valve body in which one end portion is fixed and the discharge opening is opened and is closed on the other end side, and a disposition and/or a height of the wall portion may be set according to a lift amount of the reed valve body in a longitudinal direction along the other end of the reed valve body from the one end thereof when the discharge opening is opened.
- In addition, in the compressor of the present invention, the discharge valve mechanism may include a recessed portion which is recessed on one surface on the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- According to another aspect of the present invention, there is provided a compressor including: a discharge valve mechanism which, according to a pressure difference between one side and the other side communicating with each other through a discharge port, automatically opens and closes a discharge opening which opens to the other side of the discharge port, in which the discharge valve mechanism includes a valve body which is elastically deformed as a pressure of the one side is greater than a pressure of the other side to open the discharge opening and is returned to an original state as the pressure of the one side is less than or equal to the pressure of the other side to close the discharge opening, and a recessed portion which is recessed on one surface on the other side on which the discharge opening is formed and is provided around the discharge opening and the valve body.
- In the compressor of the present invention, the wall portion and/or the recessed portion is provided around the discharge opening and the valve body. Accordingly, at the time of a valve close at which the valve body elastically deformed according to a pressure difference between the one side and the other side to open the discharge opening returns to the original state to close the discharge opening, a backflow of the compressed fluid instantaneously generated from the other side to the one side can be suppressed (prevented) by the wall portion or the recessed portion.
- Accordingly, compared to the conventional compressor, it is possible to increase generation efficiency of the compressed fluid, and it is possible to prevent the occurrence of the pulsation caused by the backflow of the compressed fluid and the occurrence of noise caused by the pulsation.
- In addition, the flow of the compressed fluid can be controlled by the wall portion or the recessed portion, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to prevent the decrease in the generation efficiency of the compressed fluid.
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FIG. 1 is a longitudinal section view showing a compressor according to first and second embodiments of the present invention. -
FIG. 2 is a longitudinal section view showing a discharge valve mechanism according to the first embodiment of the present invention. -
FIG. 3 is a view taken along line X1-X1 ofFIG. 2 and is a cross sectional view showing the discharge valve mechanism according to the first embodiment of the present invention. -
FIG. 4 is a longitudinal section view showing a modification example of the discharge valve mechanism according to the first embodiment of the present invention. -
FIG. 5 is a longitudinal section view showing a conventional discharge valve mechanism. -
FIG. 6 is a view taken along line X1-X1 ofFIG. 5 and a cross sectional view showing the conventional discharge valve mechanism. -
FIG. 7 is a longitudinal section view showing another modification example of the discharge valve mechanism according to the first embodiment of the present invention. -
FIG. 8 is a view from line X1-X1 ofFIG. 7 and a plan view showing another modification example of the discharge valve mechanism according to the first embodiment of the present invention. -
FIG. 9 is a longitudinal section view showing a discharge valve mechanism according to the second embodiment of the present invention. -
FIG. 10 is a view from line X1-X1 ofFIG. 9 and a plan view showing the discharge valve mechanism according to the second embodiment of the present invention. - Hereinafter, a compressor according to a first embodiment of the present invention will be described with reference to
FIGS. 1 to 8 . - Here, in the present embodiment, the compressor according to the present invention will be described as being a vertical type scroll compressor provided in an air conditioner, a refrigerator, or the like.
- As shown in
FIG. 1 , a compressor A of the present embodiment is configured to include ahousing 1, anelectric motor 2 provided in thehousing 1, and ascroll compression mechanism 3 which is provided in thehousing 1 and compresses a fluid such as a refrigerant by driving of theelectric motor 2. - The
housing 1 is formed to include acylindrical housing body 1a, anupper cover 1b which closes an upper end opening of thehousing body 1a, and alower cover 1c which closes a lower end opening of thehousing body 1a. In thehousing 1, asuction pipe 4 for supplying a fluid such as refrigerant from an accumulator or the like into thehousing 1 is provided on a side surface of thehousing body 1a, and adischarge pipe 5 for discharging the fluid compressed by thescroll compression mechanism 3 to the outside is provided on theupper cover 1b. - The
electric motor 2 includes astator 6 and arotor 7 and is configured to supply power from a power source to thestator 6 and rotate therotor 7 in one direction around an axis O1 extending an up-down direction S1. - In addition, a
rotary shaft 8 is integrally attached to therotor 7 such that the axis O1 direction is the up-down direction S1. An upper end side of therotary shaft 8 in the axis O1 direction is pivotally supported by anupper bearing 10, a lower end side thereof in the axis O1 direction is pivotally supported by alower bearing 11, and thus, therotary shaft 8 is provided to rotate around the axis O1 according to the rotation of therotor 7. The upper bearing 10 and thelower bearing 11 are each provided to be integrally fixed to thehousing body 1a. - An
eccentric pin 12 which has an axis O2 oriented in the up-down direction S1 and is eccentric (offset) with respect to the axis O1 of therotary shaft 8 is integrally provided on the upper end portion of therotary shaft 8. - The
scroll compression mechanism 3 includes afixed scroll 15, aturning scroll 16 which revolves around thefixed scroll 15, adischarge cover 17, and a discharge valve mechanism B. - The
fixed scroll 15 is formed to include a disk-shaped end plate 15a and a fixedlap 15b which protrudes downward from the lower surface of theend plate 15a and is spirally provided. Thefixed scroll 15 is joined to the upper bearing 10 by a bolt or the like and is disposed to be fixed to the inside of thehousing 1. Moreover, acommunication hole 18 which is formed to penetrate an upper surface of theend plate 15a from a lower surface thereof is provided in thefixed scroll 15. - The turning
scroll 16 is formed to include a disk-shaped end plate 16a and aturning lap 16b which protrudes upward from the upper surface of theend plate 16a and is spirally disposed. - In addition, a
boss 20 is integrally provided on a lower surface (rear surface) of theend plate 16a of theturning scroll 16, and a drive bush is assembled to theboss 20 via a bearing. - The
eccentric pin 12 is fitted into the drive bush. Accordingly, theturning scroll 16 is eccentrically connected to therotary shaft 8, and is provided to rotate (revolve) with an eccentric distance from the axis (axis center) O1 of therotary shaft 8 as a radius according to the rotation of therotary shaft 8 around the axis O1. In addition, a rotation restraining member such as an Oldham ring is provided between theturning scroll 16 and therotary shaft 8 such that the turning scroll 16 revolves and does not rotate. - The
fixed scroll 15 and the turningscroll 16 are disposed such that the fixedlap 15b and the turninglap 16b mesh with each other so as to overlap each other vertically. In this case, thefixed scroll 15 and theturning scroll 16 are eccentric to each other by a predetermined amount and are provided such that the fixedlap 15b and the turninglap 16b mesh with each other by shifting the phase by 180°. In addition, the fixedlap 15b and theturning lap 16b are disposed to come into contact with each other at a plurality of locations according to a rotation angle of theturning scroll 16. - Moreover, a portion between a lower surface of the
fixed scroll 15 and an upper surface of theturning scroll 16, that is, a portion in which the fixedlap 15b and the turninglap 16b mesh with each other becomes acompression chamber 21 in which a fluid such as a refrigerant is compressed. In thescroll compression mechanism 3 of the present embodiment, thecompression chamber 21 is formed point symmetrically with respect to the central portion (innermost peripheral portion) of the spiral of thefixed lap 15b and theturning lap 16b, the fluid gradually moves to the inner peripheral side while a volume of the fluid decreases according to the turning of theturning scroll 16, and thus, the fluid is compressed maximally at the center portion of the spiral. - The
discharge cover 17 is disposed above the fixedscroll 15 and is provided so as to divide the inside of thehousing 1 into anupper discharge chamber 22 to which thedischarge pipe 5 is connected and a lower space (compression chamber 21) to which thesuction pipe 4 is connected. - As shown in
FIGS. 1 ,2, 3, and 4 , the discharge valve mechanism B of the present embodiment includes adischarge port 23 which is formed to penetrate an upper surface (one surface) of the discharge cover 17 from a lower surface thereof and causes thecompression chamber 21 and thedischarge chamber 22 to communicate with each other through acommunication hole 18 formed to penetrate theend plate 15a of the fixedscroll 15, and avalve body 25 which opens and closes a circular discharge opening 24 formed so as to open to an upper surface (one surface) 17a of thedischarge cover 17 of thedischarge port 23 according to a pressure difference between thecompression chamber 21 and thedischarge chamber 22. - The
valve body 25 is a reed valve body, one end (base end) 25a side of thevalve body 25 is fixed to theupper surface 17a of thedischarge cover 17, and the other end (tip) 25b side thereof overlaps thedischarge opening 24 in the up-down direction S1 to close thedischarge opening 24. - The
valve body 25 has the oneend 25a side which is a portion fixed to thedischarge cover 17 as a supporting point, and when the pressure in thecompression chamber 21 is equal to or less than the pressure in thedischarge chamber 22, theother end 25b side closes thedischarge opening 24. In addition, when the pressure in thecompression chamber 21 is larger than the pressure in thedischarge chamber 22, thevalve body 25 is elastically deformed by the pressure difference with the oneend 25a side which is a portion fixed to thedischarge cover 17 as a supporting point, theother end 25b side is lifted upward to open thedischarge opening 24, and thus, a compressed fluid R is fed from thecompression chamber 21 to thedischarge chamber 22 through thedischarge opening 24. Moreover, thevalve body 25 opens thedischarge opening 24 to feed the compressed fluid R to thedischarge chamber 22, and if the pressure in thecompression chamber 21 is equal to or less than the pressure in thedischarge chamber 22, thevalve body 25 lowers theother end 25b side to the original state to close thedischarge opening 24. - That is, the
valve body 25 automatically opens and closes thedischarge opening 24 according to the pressure difference between thecompression chamber 21 and thedischarge chamber 22 to feed the compressed fluid R from thecompression chamber 21 to thedischarge chamber 22. - Moreover, in the present embodiment, the
discharge cover 17 includes avalve seat 17b which protrudes upward from the upper surface (one surface) 17a of thedischarge cover 17 to surround thecircular discharge opening 24 and is connected in an annular shape, and a lower surface of thevalve body 25 comes into close contact with an upper end of thevalve seat 17b in the protrusion direction to close thedischarge opening 24. - In addition, in the present embodiment, a
retainer 26 is provided, which has one end side is supported to be fixed to thedischarge cover 17, is inclined upward toward the other end side, and overlap thevalve body 25 and thedischarge opening 24 above these. Theretainer 26 abuts on thevalve body 25 when thevalve body 25 is elastically deformed by the pressure difference and is lifted up, and thus, regulates further lift-up of thevalve body 25. That is, theretainer 26 is formed at a predetermined inclination angle from the one end side toward the other end side, and thus, is provided to regulate a lift amount at each position of the portions of thevalve body 25, which are elastically deformed from the oneend 25a side to theother end 25b and are lifted up, in a longitudinal direction S2. - Accordingly, the discharge valve mechanism B of the present embodiment is configured such that the
valve body 25 is not excessively deformed elastically when opening the dischargingopening 24. - In the compressor A of the present embodiment configured as described above, for example, when the operation of the compressor A is controlled by a controller provided in the air conditioner or the refrigerator and the compressor A starts, the
electric motor 2 is energized by the controller and a fluid such as a refrigerant is introduced into thehousing 1 through thesuction pipe 4. - If the
electric motor 2 is energized, therotary shaft 8 rotates, and the turningscroll 16 performs a revolution turning motion with respect to the fixedscroll 15. Accordingly, the fluid such as the refrigerant is compressed in thecompression chamber 21 between the turningscroll 16 and the fixedscroll 15. In addition, the fluid is compressed by the revolution turning motion of the turningscroll 16, and the fluid is sequentially sucked from thesuction pipe 4 into thehousing 1, and from the outer peripheral portions of the turningscroll 16 and the fixedscroll 15 to the portion between the turningscroll 16 and the fixedscroll 15. - In addition, the compressed fluid R which is compressed maximally in the
compression chamber 21 formed at the center portion of the spiral flows through thecommunication hole 18 and thedischarge port 23 to push up thevalve body 25 of the discharge valve mechanism B, and the compressed fluid R is fed to be ejected into thedischarge chamber 22 from thedischarge opening 24 which is opened by pushing up thevalve body 25. Moreover, the compressed fluid R is discharged to an external refrigerant circuit or the like through thedischarge pipe 5 from thedischarge chamber 22. In this case, the fluid in thecompression chamber 21 of the center portion of the spiral is discharged until the pressures in thecompression chamber 21, thecommunication hole 18, and thedischarge port 23 are balanced with the pressure in thedischarge chamber 22. - That is, if the compressed fluid R is discharged to the
discharge chamber 22 and the pressure in thecompression chamber 21 is equal to or less than the pressure in thedischarge chamber 22, thevalve body 25 is pushed down and thedischarge opening 24 is automatically closed. Accordingly, until the operation of the compressor A is controlled to be stopped by the controller, the compressed fluid R having a predetermined pressure is generated by the revolution turning motion of the turningscroll 16 continued by the driving of theelectric motor 2, and the discharge and the supply of the compressed fluid R with respect to the refrigerant circuit or the like are repeatedly performed. - Here, the
valve body 25 is gradually pushed down as the compressed fluid R is ejected from thedischarge opening 24 and the pressure difference between thecompression chamber 21 and thedischarge chamber 22 decreases, and thedischarge opening 24 is closed when thevalve body 25 abuts on thevalve seat 17b. - When the
discharge opening 24 is closed, as shown inFIGS. 5 and 6 , a pressure balance is instantaneously lost in a state where the pressure difference between thecompression chamber 21 and thedischarge chamber 22 decreases and thevalve body 25 does not completely close thedischarge opening 24, and thus, there is a concern that a backflow of the compressed fluid R (R') from thedischarge chamber 22 to thecompression chamber 21 occurs. If this backflow phenomenon occurs, a decrease in a generation efficiency of the compressed fluid R is generated. In addition, there is a concern that a pressure pulsation and noise are generated by the backflow of the compressed fluid R. Moreover, when the compressed fluid R is ejected from thedischarge opening 24 into thedischarge chamber 22, the compressed fluid R is ejected only in certain limited direction ofdischarge opening 24, and thus, a choke flow easily occurs. - On the other hand, in the discharge valve mechanism B of the present embodiment, as shown in
FIGS. 2, 3, and 4 , awall portion 30 which protrudes upward from the upper surface (one surface) 17a of thedischarge cover 17 is provided around thedischarge opening 24 and thevalve body 25. - In addition, in the present embodiment, the
wall portion 30 is provided in a vortex flow generation region in which the compressed fluid R which flows through thedischarge port 23 and is discharged from thedischarge opening 24 becomes a vortex flow when the pressure in thecompression chamber 21 is larger than the pressure in thedischarge chamber 22 and the compressed fluid R is fed from thedischarge opening 24 opened by the elastic deformation of thevalve body 25 thedischarge chamber 22. - In addition, as shown in
FIGS. 7 and 8 , thewall portion 30 may be formed such that a height thereof is changed in the protrusion direction according to the positions around thedischarge opening 24 and thevalve body 25 to correspond the inclination angle of thevalve body 25 elastically deformed by the pressure difference between thecompression chamber 21 and thedischarge chamber 22, that is, to correspond (for example, is in proportion with) the lift amount L of each position from the oneend 25a side of thevalve body 25 to theother end 25b thereof in the longitudinal direction S2. In other words, thewall portion 30 is not provided or the height of thewall portion 30 decreases in a portion where the backflow of the compressed fluid R is rarely generated (is not generated) or the vortex flow is rarely generated (is not generated). - In addition, as shown in
FIG. 8 , thevalve body 25 does not need to be constricted with respect to the portion on theother end 25b side and formed with a narrower width on the oneend 25a side. That is, it is not particularly necessary to limit the shape of thevalve body 25. - Accordingly, in the compressor A of the present embodiment, the
wall portion 30 is provided around thedischarge opening 24 and thevalve body 25, and thus, it is possible to suppress / prevent the occurrence of the backflow of the compressed fluid R (R') from thedischarge chamber 22 to thecompression chamber 21 by thewall portion 30 at a moment of valve closing at which thevalve body 25 elastically deformed to open thedischarge opening 24 returns the original state and thedischarge opening 24 is closed. - Accordingly, compared to the conventional compressor, it is possible to increase the generation efficiency of the compressed fluid R, and it is possible to prevent the occurrence of the pulsation caused by the backflow of the compressed fluid R and the occurrence of the noise caused by the pulsation. In addition, the flow of the compressed fluid R can be controlled by the
wall portion 30, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R. - In addition, in the compressor A of the present embodiment, the
wall portion 30 is provided in the vortex flow generation region in which the compressed fluid R discharged from thedischarge opening 24 becomes the vortex flow, and thus, it is possible to suppress / prevent the occurrence of the vortex flow of the compressed fluid R. Accordingly, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R caused by the occurrence of the vortex flow of the compressed fluid R. - Moreover, the
wall portion 30 is not provided or the height of thewall portion 30 decreases in the portion where the backflow of the compressed fluid R is rarely generated (is not generated) or the vortex flow is rarely generated (is not generated), and thus, a pressure loss caused by providing thewall portion 30 is prevented, and the above-described effects can be realized. - Hereinbefore, the first embodiment of the compressor of the present invention is described. However, the present invention is not limited to the first embodiment and can be appropriately modified within a scope which does not departed from the gist.
- In the present embodiment, the case in which the compressor according to the present invention is a vertical type scroll compressor provided in an air conditioner, a refrigerator, or the like is described. However, the compressor of the present invention may be other type compressors such as a horizontal type scroll compressor or rotary compressor.
- That is, the present invention may be any configuration as long as it includes the discharge valve mechanism B having the
valve body 25 which opens and closes the discharge opening 24 of thedischarge port 23 causing the oneside 21 to communicate with theother side 22 and feeding the compressed fluid R by the pressure difference between the oneside 21 and theother side 22 and thewall portion 30 for suppressing / preventing the occurrence of the backflow or the vortex flow of the compressor fluid R is provided in the discharge valve mechanism B, and particularly, there is no need to limit the type / the configuration for generating the compressed fluid R. - Moreover, even in a case where the type / the configuration for generating the compressed fluid R are different from those of the compressor A of the present embodiment, if the
wall portion 30 for suppressing / preventing the occurrence of the backflow or the vortex flow of the compressed fluid R is provided in the discharge valve mechanism B, effects similar to those of the present embodiment can be obtained. - Moreover, in the present embodiment, the
wall portion 30 is provided in the vortex flow generation region of the compressed fluid R. However, thewall portion 30 may be provided in the vicinity of thevalve seat 17b on theother end 25b side of thevalve body 25 or the like, that is, thewall portion 30 may be provided at a location at which the amount of the backflow of the compressed fluid R is large regardless of frequency of the occurrence of the vortex flow or presence or absence of the vortex flow (refer toFigs. 7 and 8 ). In addition, the side surface of thewall portion 30 may be formed in a multistage shape (stepwise shape) to more effectively suppress / prevent the occurrence of the backflow or the vortex flow. - Next, a compressor according to a second embodiment of the present invention will be described with reference to
FIGS. 9 and 10 (FIG. 1 ). Next, similarly to the first embodiment, in the present embodiment, the compressor according to the present invention relates to the scroll compressor provided in an air conditioner or a refrigerator, and only a configuration of a discharge valve mechanism is different from that of the first embodiment. Accordingly, in the present embodiment, the same reference numerals are assigned to configurations similar to those of the first embodiment, and detail descriptions thereof are omitted. - Similarly to the first embodiment, the compressor A of the present embodiment is configured to include the
housing 1, theelectric motor 2 provided in thehousing 1, and thescroll compression mechanism 3 which is provided in thehousing 1 and compresses a fluid such as a refrigerant by driving of theelectric motor 2. - The
scroll compression mechanism 3 includes the fixedscroll 15, the turningscroll 16 which revolves around the fixedscroll 15, thedischarge cover 17, and the discharge valve mechanism B. - In addition, the discharge valve mechanism B of the present embodiment includes the
discharge port 23 which is formed to penetrate theupper surface 17a of the discharge cover 17 from the lower surface thereof and causes thecompression chamber 21 and thedischarge chamber 22 to communicate with each other through thecommunication hole 18 formed to penetrate theend plate 15a of the fixedscroll 15, and thevalve body 25 which opens and closes the circular discharge opening 24 formed so as to open to theupper surface 17a of thedischarge cover 17 of thedischarge port 23 according to the pressure difference between thecompression chamber 21 and thedischarge chamber 22. - In the discharge valve mechanism B of the present embodiment, as shown in
FIGS. 9 and 10 , a recessedportion 31 which is recessed downward from theupper surface 17a of thedischarge cover 17 is provided around thedischarge opening 24 and thevalve body 25. - Moreover, in the present embodiment, the recessed
portion 31 may be formed such that a depth thereof is changed in the recessed direction according to the positions around thedischarge opening 24 and thevalve body 25 to correspond the inclination angle of thevalve body 25 elastically deformed by the pressure difference between thecompression chamber 21 and thedischarge chamber 22, that is, to correspond (for example, is in proportion with) the lift amount L of each position from the oneend 25a side of thevalve body 25 to theother end 25b thereof in the longitudinal direction S2. In other words, the recessedportion 31 may not be provided or the depth of the recessedportion 31 may decrease in a portion where the backflow of the compressed fluid R is rarely generated (is not generated). - Accordingly, in the compressor A of the present embodiment, the recessed
portion 31 is provided around thedischarge opening 24 and thevalve body 25, and thus, it is possible to suppress / prevent the occurrence of the backflow of the compressed fluid R from thedischarge chamber 22 to thecompression chamber 21 by the recessedportion 31 at a moment of valve closing at which thevalve body 25 elastically deformed to open thedischarge opening 24 returns the original state and thedischarge opening 24 is closed. - Accordingly, compared to the conventional compressor, it is possible to increase the generation efficiency of the compressed fluid R, and it is possible to prevent the occurrence of the pulsation caused by the backflow of the compressed fluid R and the occurrence of the noise caused by the pulsation. In addition, the flow of the compressed fluid R can be controlled by the recessed
portion 31, and thus, it is possible to prevent the occurrence of the choke flow. From this, it is possible to suppress / prevent the decrease in the generation efficiency of the compressed fluid R. - Moreover, the recessed
portion 31 is not provided or the depth of the recessedportion 31 decreases in the portion where the backflow of the compressed fluid R is rarely generated (is not generated), and thus, a pressure loss caused by providing the recessedportion 31 is prevented, and the above-described effects can be realized. - Hereinbefore, the second embodiment of the compressor according to the present invention is described. However, the present invention is not limited to the second embodiment, can include a modification example (a modification example similar to the modification example of the first embodiment) of the first embodiment, and can be appropriately modified within the scope which does not depart from the gist.
- For example, the discharge valve mechanism B which includes the
wall portion 30 of the first embodiment and the recessedportion 31 of the present embodiment may be configured. For example, as shown inFIG. 10 , if thewall portion 30 is provided on a T1 side and the recessedportion 31 is provided on a T2 side, the effects can be appropriately exerted. - While preferred embodiments of the invention have been described and illustrated above, it should be understood that these are exemplary of the invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the present invention. Accordingly, the invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.
-
- 1: housing
- 1a: housing body
- 1b: upper cover
- 1c: lower cover
- 2: electric motor
- 3: scroll compression mechanism
- 4: suction pipe
- 5: discharge pipe
- 6: stator
- 7: rotor
- 8: rotary shaft
- 10: upper bearing
- 11: lower bearing
- 12: eccentric pin
- 15: fixed scroll
- 15a: end plate
- 15b: fixed lap
- 16: turning scroll
- 16a: end plate
- 16b: turning lap
- 17: discharge cover
- 17a: upper surface (one surface)
- 17b: valve seat
- 18: communication hole
- 20: boss
- 21: compression chamber (one side)
- 22: discharge chamber (other side)
- 23: discharge port
- 24: discharge opening
- 25: valve body (reed valve body)
- 25a: one end
- 25b: other end
- 26: retainer
- 30: wall portion
- 31: recessed portion
- A: compressor
- B: discharge valve mechanism
- L: lift amount
- O1: axis
- O2: axis
- R: compressed fluid
- R': compressed fluid flowing backward
- S1: up-down direction
- S2: longitudinal direction of valve body
Claims (5)
- A compressor comprising:a discharge valve mechanism (B) which, according to a pressure difference between one side (21) and the other side (22) communicating with each other through a discharge port (23), automatically opens and closes a discharge opening (24) which opens to the other side of the discharge port (23),wherein the discharge valve mechanism (B) includes a valve body (25) which is configured to be elastically deformed as a pressure of the one side (21) is greater than a pressure of the other side (22) to open the discharge opening (24) and to return to an original state as the pressure of the one side (21) is less than or equal to the pressure of the other side (22) to close the discharge opening (24), and a wall portion (30) which protrudes from one surface (17a) of the other side (22) on which the discharge opening (24) is formed and is provided around the discharge opening (24) and the valve body (25).
- The compressor according to claim 1,
wherein the wall portion (30) is disposed in a vortex flow generation region in which the discharge opening (24) is opened and a compressed fluid discharged from the one side (21) to the other side (22) becomes a vortex flow. - The compressor according to claim 1 or 2,
wherein the valve body (25) is a reed valve body in which one end portion is fixed and the discharge opening (24) is opened and is closed on the other end side, and a disposition and/or a height of the wall portion (30) is set according to a lift amount of the reed valve body (25) in a longitudinal direction along the other end (25b) of the reed valve body (25) from the one end (25a) thereof when the discharge opening (24) is opened. - The compressor according to any one of claims 1 to 3,
wherein the discharge valve mechanism (B) includes a recessed portion (31) which is recessed on one surface on the other side (22) on which the discharge opening (24) is formed and is provided around the discharge opening (24) and the valve body (25). - A compressor comprising:a discharge valve mechanism (B) which, according to a pressure difference between one side (21) and the other side (22) communicating with each other through a discharge port (23), automatically opens and closes a discharge opening (24) which opens to the other side (22) of the discharge port (23),wherein the discharge valve mechanism (B) includes a valve body (25) which is configured to be elastically deformed as a pressure of the one side (21) is greater than a pressure of the other side (22) to open the discharge opening (24) and to return to an original state as the pressure of the one side (21) is less than or equal to the pressure of the other side (22) to close the discharge opening (24), and a recessed portion (31) which is recessed on one surface on the other side (22) on which the discharge opening (24) is formed and is provided around the discharge opening (24) and the valve body (25).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016232842A JP2018091165A (en) | 2016-11-30 | 2016-11-30 | Compressor |
Publications (1)
Publication Number | Publication Date |
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EP3330544A1 true EP3330544A1 (en) | 2018-06-06 |
Family
ID=60452529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17203559.4A Withdrawn EP3330544A1 (en) | 2016-11-30 | 2017-11-24 | Compressor |
Country Status (2)
Country | Link |
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EP (1) | EP3330544A1 (en) |
JP (1) | JP2018091165A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111120266A (en) * | 2018-10-31 | 2020-05-08 | 广东美芝制冷设备有限公司 | Exhaust structure of compressor and compressor with same |
CN111852873A (en) * | 2020-07-27 | 2020-10-30 | 重庆长安汽车股份有限公司 | Mechanical vacuum pump |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898692A (en) * | 1981-12-09 | 1983-06-11 | Matsushita Refrig Co | Rotary compressor |
JPS608577A (en) * | 1983-06-29 | 1985-01-17 | Hitachi Ltd | Construction of delivery valve for compressor |
EP0174530A2 (en) * | 1984-09-06 | 1986-03-19 | Mitsubishi Denki Kabushiki Kaisha | Refrigerant compressor discharge valve |
JPS62199988A (en) * | 1986-02-28 | 1987-09-03 | Toshiba Corp | Rotary type compressor |
JPS63289285A (en) * | 1987-05-20 | 1988-11-25 | Fujitsu General Ltd | Rotary compressor |
DE4007371A1 (en) * | 1989-03-09 | 1990-09-13 | Brasil Compressores Sa | Outlet valve for rotary piston compressor |
US5203686A (en) * | 1991-11-04 | 1993-04-20 | General Electric Company | Rotary compressor with span type discharge valve |
JP2004011457A (en) * | 2002-06-04 | 2004-01-15 | Denso Corp | Discharge valve structure for compressor |
JP2013167215A (en) | 2012-02-16 | 2013-08-29 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
JP2014040827A (en) | 2012-07-25 | 2014-03-06 | Daikin Ind Ltd | Compressor |
-
2016
- 2016-11-30 JP JP2016232842A patent/JP2018091165A/en active Pending
-
2017
- 2017-11-24 EP EP17203559.4A patent/EP3330544A1/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898692A (en) * | 1981-12-09 | 1983-06-11 | Matsushita Refrig Co | Rotary compressor |
JPS608577A (en) * | 1983-06-29 | 1985-01-17 | Hitachi Ltd | Construction of delivery valve for compressor |
EP0174530A2 (en) * | 1984-09-06 | 1986-03-19 | Mitsubishi Denki Kabushiki Kaisha | Refrigerant compressor discharge valve |
JPS62199988A (en) * | 1986-02-28 | 1987-09-03 | Toshiba Corp | Rotary type compressor |
JPS63289285A (en) * | 1987-05-20 | 1988-11-25 | Fujitsu General Ltd | Rotary compressor |
DE4007371A1 (en) * | 1989-03-09 | 1990-09-13 | Brasil Compressores Sa | Outlet valve for rotary piston compressor |
US5203686A (en) * | 1991-11-04 | 1993-04-20 | General Electric Company | Rotary compressor with span type discharge valve |
JP2004011457A (en) * | 2002-06-04 | 2004-01-15 | Denso Corp | Discharge valve structure for compressor |
JP2013167215A (en) | 2012-02-16 | 2013-08-29 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
JP2014040827A (en) | 2012-07-25 | 2014-03-06 | Daikin Ind Ltd | Compressor |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111120266A (en) * | 2018-10-31 | 2020-05-08 | 广东美芝制冷设备有限公司 | Exhaust structure of compressor and compressor with same |
CN111120266B (en) * | 2018-10-31 | 2022-04-15 | 广东美芝制冷设备有限公司 | Exhaust structure of compressor and compressor with same |
CN111852873A (en) * | 2020-07-27 | 2020-10-30 | 重庆长安汽车股份有限公司 | Mechanical vacuum pump |
Also Published As
Publication number | Publication date |
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JP2018091165A (en) | 2018-06-14 |
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