JP2018155202A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor capable of reducing pressure loss at a discharge port without reducing sealability and valve strength in a valve closed state.SOLUTION: A discharge port 15c, 17c provided at a base part 15, 17 partitioning a compression side and a discharge side, has a compression side hole part 15f, 17f provided on the compression side, and a discharge side hole part 15g, 17g provided on the discharge side, communicating with the compression side hole part 15f, 17f, and having a discharge port. A part of an inner peripheral surface of the discharge side hole part 15g, 17g is a swollen part 15h, 17h separating from one end of a valve body 25 with respect to the inner peripheral surface of the compression side hole part 15f, 17f in a plan view.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a compressor.

  Air conditioners, refrigerators, and the like are provided with a compressor for compressing a fluid such as a refrigerant. Here, in a scroll compressor, a rotary compressor, or the like which is a kind of compressor, a discharge valve mechanism using a reed valve or the like is provided between a compression side where the refrigerant is compressed and a discharge side which discharges the compressed refrigerant. It has been.

  For example, the refrigerant compressor of Patent Document 1 is configured such that refrigerant compressed by a compression element on the compression side is discharged from a discharge port provided with a discharge valve mechanism to the discharge side. In this refrigerant compressor, a discharge port is provided through a main bearing or the like that partitions the compression side and the discharge side, and the discharge port can be opened and closed by a valve seat and a valve body provided on the discharge side. .

JP 2001-99066 A

However, in the conventional compressor, the pressure loss at the discharge port having the discharge valve mechanism is large. For example, in order to increase the capacity or operate under severe conditions, it is desired to reduce the pressure loss at the discharge port. It was rare.
However, when the discharge port is increased in order to reduce the pressure loss, the valve body is likely to be deformed or displaced in the closed state, the sealing performance is likely to be lowered, and the valve strength is easily lowered.

  The present invention has been made in order to solve the above-described problem, and provides a compressor capable of reducing pressure loss at a discharge port without lowering sealing performance and valve strength in a state where a valve body is closed. The purpose is to provide.

  According to the compressor of the first aspect of the present invention, the base portion that partitions the compression side and the discharge side, the discharge port that penetrates the base portion, one end is fixed to the base portion, and the other end is the above-mentioned A valve body that faces the discharge port and closes the discharge port, and when the pressure on the compression side becomes larger than the pressure on the discharge side, the other end is elastically deformed to open the discharge port. A compression side hole provided on the compression side, and a discharge side hole provided on the discharge side and having a discharge port in communication with the compression side hole, the discharge side hole being In addition, a part of the inner peripheral surface has a bulging portion that is spaced apart from one end of the valve body from the inner peripheral surface of the compression side hole portion in plan view, at the discharge side end.

Since only one end of the valve body is fixed to the base portion, the valve body is disposed obliquely from one end to the other end with respect to the base portion when the discharge port is opened. Therefore, the compressed fluid discharged from the discharge port is guided to the surface of the valve body disposed obliquely and flows obliquely from one end to the other end. Here, according to this invention, the bulging part spaced apart from the one end of the valve body from the internal peripheral surface of the compression side hole part by planar view is provided in the internal peripheral surface of the discharge side hole part. Therefore, the discharge direction of the compressed fluid introduced into the compression side hole and discharged from the discharge side hole can be matched with the direction along the valve body in advance. In addition, since the other end of the valve body is elastically deformed obliquely to open the discharge port, by discharging the compressed fluid discharged from the discharge side hole toward the other end side of the valve body, the valve body is more The compressed fluid can be discharged toward the side that is largely away from the discharge port. Therefore, the pressure loss when the compressed fluid is discharged from the discharge port can be reduced.
Moreover, the distance from the one end of a valve body to a discharge port becomes large by providing a bulging part in the internal peripheral surface of a discharge side hole part. Therefore, the length from the one end fixed to the base part in the valve body to the opening / closing part of the discharge port becomes longer. Thereby, the valve body is easily elastically deformed, and the pressure loss of the compressed fluid during discharge can be further reduced. In addition, the durability of the valve body is increased because the valve body is easily elastically deformed, so that it is possible to avoid the deterioration of the sealing performance of the discharge port due to long-term use.

  According to the compressor of the second aspect of the present invention, in the first aspect, the discharge side hole is formed with a smaller diameter than the compression side hole, and the center of the discharge side hole is It is arrange | positioned in the side away from the end of the said valve body rather than the center of the said compression side hole part, A part of inner peripheral surface of the said discharge side hole part may be sufficient as it.

  According to this configuration, the opening of the compression side hole can be widely provided, and the discharge port of the discharge side hole can be made smaller than the opening of the compression side hole. And the pressure loss at the time of a compressed fluid being introduce | transduced into a compression side hole part can be reduced by enlarging opening of a compression side hole part. On the other hand, by reducing the discharge port of the discharge side hole, it is possible to suppress deformation of the valve body (such as bending of the valve body into the discharge port) when the discharge port is closed by the valve body. Therefore, it is easier to ensure sufficient sealing performance when the discharge port is closed by the valve body, and it is possible to suppress a decrease in valve strength.

  According to the compressor of the third aspect of the present invention, in the first or second aspect, the opening area of the communication portion between the compression side hole and the discharge side hole is the discharge side hole. It is good to form more than a cross-sectional area.

  According to this configuration, since the opening area of the communication portion between the compression side hole and the discharge side hole is formed to be larger than the cross-sectional area of the discharge side hole, pressure loss at the communication portion can be reduced. Can do. If the compression side hole portion and the discharge side hole portion communicate with each other eccentrically, a portion having a small opening area with an angular shape at the communication portion is likely to occur. Therefore, the pressure loss of the compressed fluid flowing through the communication portion can be significantly reduced by securing the opening area of the communication portion.

  According to the compressor of the fourth aspect of the present invention, in any one of the first to third aspects, the base portion is located on the base portion main body at a position where the base portion main body and the valve body are provided. On the other hand, a seating plate that is detachable and made of a material harder than the base portion main body may be provided, and the discharge side hole may be provided in the seating plate.

  Thus, the rigid seating plate is provided, and the surface on the base portion side of the valve body is abutted and supported by the seating plate by providing the discharge side hole in the seating plate. Therefore, the valve body does not directly contact the base portion main body when opening and closing, and the base portion main body can be prevented from being damaged.

  Further, according to the compressor of the fifth aspect of the present invention, in any one of the first to fourth aspects, an edge portion of the communication portion between the compression side hole portion and the discharge side hole portion is provided. A chamfered portion may be formed.

  Such a chamfered portion can reduce pressure loss at the communication portion between the compression side hole and the discharge side hole.

  According to the compressor of the present invention, there is provided a compressor capable of reducing the pressure loss at the discharge port without reducing the sealing performance and the valve strength when the valve body is closed.

It is a longitudinal section showing a compressor concerning an embodiment of the present invention. It is a top view which shows the discharge valve mechanism which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the discharge valve mechanism which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the discharge valve mechanism which concerns on the 1st modification of embodiment of this invention. It is a longitudinal cross-sectional view which shows the discharge valve mechanism which concerns on the 2nd modification of embodiment of this invention. It is a longitudinal cross-sectional view which shows the discharge valve mechanism which concerns on the 3rd modification of embodiment of this invention.

Hereinafter, the compressor A according to the embodiment of the present invention will be described.
Here, in the present embodiment, description will be made assuming that the compressor A is a vertical scroll compressor provided in an air conditioner, a refrigerator, or the like.

  As shown in FIG. 1, the compressor A of the present embodiment is provided in a housing 1, an electric motor 2 provided in the housing 1, and the housing 1. And a scroll compression mechanism 3 for compression.

  The housing 1 includes a cylindrical housing body 1a, an upper cover 1b that closes the opening at the upper end of the housing body 1a, and a lower cover 1c that closes the opening at the lower end of the housing body 1a. The housing 1 is provided with a suction pipe 4 for supplying a fluid such as a refrigerant into the housing 1 from an accumulator or the like on the side surface of the housing body 1a, and discharges the fluid compressed by the scroll compression mechanism 3 to the upper cover 1b. A discharge pipe 5 is provided.

The electric motor 2 includes a stator 6 and a rotor 7, and is configured such that power is supplied from the power source to the stator 6 and the rotor 7 rotates in one direction around the axis O1 extending in the vertical direction S1.
A rotating shaft 8 is integrally attached to the rotor 7 with the direction of the axis O1 directed in the vertical direction S1. The rotary shaft 8 is provided such that the upper end side in the axis O1 direction is pivotally supported by the upper bearing 10 and the lower end side is pivotally supported by the lower bearing 11, and rotates around the axis O1 as the rotor 7 rotates. Each of the upper bearing 10 and the lower bearing 11 is integrally fixed to the housing body 1a.
An eccentric pin 12 is integrally provided at the upper end portion of the rotating shaft 8 so that the axis O2 thereof is oriented in the vertical direction S1 and is eccentric (offset) with respect to the axis O1 of the rotating shaft 8.

  The scroll compression mechanism 3 includes a fixed scroll 15 (base portion), a turning scroll 16 that revolves eccentrically with respect to the fixed scroll 15 by the electric motor 2, and a discharge cover 17 (base portion).

  The fixed scroll 15 includes a disk-shaped end plate 15a and a fixed wrap 15b that protrudes downward from the lower surface of the end plate 15a and is provided in a spiral shape. The fixed scroll 15 is fixedly disposed in the housing 1 by, for example, being bolted to the upper bearing 10.

  The orbiting scroll 16 includes a disk-shaped end plate 16a and an orbiting wrap 16b that protrudes upward from the upper surface of the end plate 16a and is disposed in a spiral shape. The orbiting wrap 16 b of the orbiting scroll 16 is accommodated between the fixed wraps 15 b of the fixed scroll 15.

A boss 20 is integrally provided on the lower surface of the end plate 16 a of the orbiting scroll 16, and the eccentric pin 12 is fitted to the boss 20.
As a result, the orbiting scroll 16 is eccentrically connected to the rotary shaft 8, is driven to rotate around the axis O <b> 1 of the rotary shaft 8, and rotates (revolves) with the eccentric distance from the axis (axis) O <b> 1 of the rotary shaft 8 as the radius. ). Note that the orbiting scroll 16 revolves without rotating.

  The fixed scroll 15 and the orbiting scroll 16 mesh the fixed wrap 15b and the orbiting wrap 16b so as to overlap each other. The fixed scroll 15 and the orbiting scroll 16 are decentered from each other by a predetermined amount, and the fixed wrap 15b and the orbiting wrap 16b are engaged with each other by shifting the phase by 180 degrees. Contact at multiple locations.

  A portion between the lower surface of the fixed scroll 15 and the upper surface of the orbiting scroll 16, that is, a portion engaging the fixed wrap 15 b and the orbiting wrap 16 b is a compression chamber 21 that compresses a fluid such as a refrigerant. In the scroll compression mechanism 3 according to the present embodiment, the compression chamber 21 is formed point-symmetrically with respect to the central portions of the spirals of the fixed wrap 15b and the orbiting wrap 16b, and the volume thereof is reduced according to the orbiting motion of the orbiting scroll 16. The fluid is configured to be compressed to the maximum at the center of the vortex by gradually transitioning to the inner periphery side.

  The end plate 15a of the fixed scroll 15 is provided with a discharge port 15c penetratingly formed in the end plate 15a and communicating with the upper and lower spaces at a position corresponding to the center portion of the compression chamber 21, on the upper surface side of the discharge port 15c. A discharge valve mechanism C is configured. The discharge valve mechanism C is a mechanism that opens and closes the discharge port 15d of the discharge port 15c according to the pressure difference between the intermediate chamber 19 and the compression chamber 21 between the fixed scroll 15 and the discharge cover 17.

The discharge cover 17 is disposed above the fixed scroll 15, and is disposed in the lower space and the intermediate chamber 19 to which the suction pipe 4 is connected, and the upper discharge chamber 22 to which the discharge pipe 5 is connected. The inside is partitioned.
The discharge cover 17 is provided with a discharge port 17c that communicates with the upper and lower spaces, and a discharge valve mechanism B is formed on the upper surface side of the discharge port 17c. The discharge valve mechanism B is a mechanism that opens and closes the discharge port 17d of the discharge port 17c in accordance with the pressure difference between the intermediate chamber 19 and the discharge chamber 22.

  As shown in FIGS. 2 and 3, the discharge valve mechanism B and the discharge valve mechanism C include discharge ports 15 c and 17 c that penetrate the end plate 15 a or the discharge cover 17 of the fixed scroll 15, and the end plate 15 a of the fixed scroll 15. Alternatively, the valve seats 15e and 17e provided on the upper surface of the discharge cover 17, the valve body 25 closing the discharge ports 15c and 17c facing the discharge ports 15d and 17d, and the valve body 25 and the discharge port 17d overlap. And a retainer 26 arranged as described above.

The discharge port 17c of the discharge valve mechanism B and the discharge port 15c of the discharge valve mechanism C are provided with the compression side holes 15f and 17f provided on the compression chamber 21 side and the discharge ports 15d and 17d provided on the discharge chamber 22 side. The discharge side holes 15g and 17g are provided.
The compression side holes 15f and 17f and the discharge side holes 15g and 17g are bottomed holes having a circular cross section, and are formed in opposite directions. That is, the compression side holes 15f and 17f are formed on the end plate 15a of the fixed scroll 15 or the discharge cover 17 from the compression side, and the discharge side holes 15g and 17g are formed from the discharge side, for example, by a drill. The cross-sectional area of the discharge side holes 15g and 17g is smaller than the cross-sectional area of the compression side holes 15f and 17f, and the discharge side holes 15g and 17g are formed to have a smaller diameter than the compression side holes 15f and 17f. The cross-sectional area here is a cross-sectional area in a plane orthogonal to the center line in each hole, and means the maximum cross-sectional area in each hole.

  The centers of the discharge side holes 15g and 17g are eccentric with respect to the centers of the compression side holes 15f and 17f, and the centers of the discharge side holes 15g and 17g are more than the centers of the compression side holes 15f and 17f. The body 25 is separated from the one end 25a. Since the discharge side holes 15g and 17g are eccentric with respect to the compression side holes 15f and 17f, a part of the inner peripheral surface of the discharge side holes 15g and 17g is compressed in the plan view. The bulging portions 15h and 17h bulge to the side away from the one end 25a of the valve body 25 from the inner peripheral surface of 17f.

Further, on the bottom side of the compression side holes 15f and 17f and the bottom side of the discharge side holes 15g and 17g, a communication part 15i that allows the compression side holes 15f and 17f and the discharge side holes 15g and 17g to communicate with each other. , 17i are provided. The opening areas of the communication portions 15i and 17i are formed to be larger than the cross-sectional areas of the discharge side hole portions 15g and 17g. The opening area of the communication portions 15i and 17i is an area of a portion surrounded by a boundary line X (see FIG. 3) between the compression side holes 15f and 17f and the discharge side holes 15g and 17g.
Here, a chamfered portion such as an R surface or a C surface may be provided at an edge portion forming the boundary line X in the communication portions 15i, 17i.

  The valve seats 15 e and 17 e are formed directly on the upper surface of the end plate 15 a of the fixed scroll 15 and the upper surface of the discharge cover 17. The valve seats 15e and 17e each have a surface shape corresponding to the surface shape of the valve body 25 facing each other, and in this embodiment, the valve seats 15e and 17e are formed in a planar shape in substantially the entire region facing the valve body 25.

The valve body 25 is composed of a reed valve, and one end 25 a is fixed to the end plate 15 a of the fixed scroll 15 or the upper surface of the discharge cover 17. The other end 25b closes the discharge ports 15c and 17c while being in contact with the valve seats 15e and 17e.
The valve body 25 is provided so as to be elastically deformable in the direction of approaching and separating from the upper surface of the end plate 15a or the discharge cover 17 with the end 25a fixed to the upper surface of the end plate 15a or the discharge cover 17 of the fixed scroll 15 as a fulcrum. Yes.

The retainer 26 is provided so that one end side is fixed to and supported by the discharge cover 17 and is inclined upward toward the other end side so as to overlap the valve body 25 and the discharge port 17d. The retainer 26 is formed so as to be inclined from one end side to the other end side, so that the lift amount at each position is restricted when the valve body 25 is elastically deformed by a pressure difference and lifts up.
In the present embodiment, the valve body 25 and the retainer 26 are fastened and fixed to the end plate 15a of the fixed scroll 15 or the discharge cover 17 at one end 25a.

  In the compressor A as described above, when the electric motor 2 revolves by revolving at a position where the orbiting scroll 16 is eccentric with respect to the fixed scroll 15, the compression chamber between the spiral fixed wrap 15b and the orbiting wrap 16b. The refrigerant is compressed to the maximum at the center of the spiral while being compressed at 21.

  In the discharge valve mechanism B, when the pressure in the compression chamber 21 is equal to or lower than the pressure in the intermediate chamber 19, the other end 25b side is kept in a state where the discharge port 17d is closed. When the pressure in the compression chamber 21 becomes larger than the pressure in the intermediate chamber 19, the fixed portion (bolt 30) on the one end 25a side is used as a fulcrum, and elastic deformation occurs according to the pressure difference, and the other end 25b side is lifted up from the valve seat 15e. Then, the discharge port 17d is opened. Thereby, the compressed fluid is fed from the compression chamber 21 to the intermediate chamber 19 through the discharge port 17d. When the pressure in the compression chamber 21 becomes equal to or lower than the pressure in the intermediate chamber 19, the other end 25b side of the valve body 25 is restored to the original state, and the discharge port 17d is closed.

Further, in the discharge valve mechanism C, when the pressure in the intermediate chamber 19 is equal to or lower than the pressure in the discharge chamber 22, the other end 25b side is kept in a state where the discharge port 17d is closed. When the pressure in the intermediate chamber 19 becomes larger than the pressure in the discharge chamber 22, the fixed portion (bolt 30) on the one end 25a side is used as a fulcrum, and elastic deformation occurs according to the pressure difference, and the other end 25b side is lifted up from the valve seat 15e. Then, the discharge port 17d is opened. Thereby, the compressed fluid is fed from the intermediate chamber 19 to the discharge chamber 22 through the discharge port 17d. When the pressure in the compression chamber 21 becomes equal to or lower than the pressure in the intermediate chamber 19, the other end 25b side of the valve body 25 is restored to the original state, and the discharge port 17d is closed.
When these are continuous, the compressed fluid is sequentially discharged from the discharge pipe 5 to be used.

  According to the compressor A as described above, since only one end 25a of the valve body 25 is fixed to the end plate 15a or the discharge cover 17, the end plate 15a or the discharge cover is opened when the discharge ports 15d and 17d are opened. 17 is disposed obliquely from one end 25a to the other end 25b. Therefore, the compressed fluid discharged from the discharge ports 15d and 17d is guided by the surface of the valve body 25 disposed obliquely and flows obliquely from the one end 25a to the other end 25b.

  In the present embodiment, bulging portions 15h and 17h that are spaced apart from one end 25a of the valve body 25 from the inner peripheral surface of the compression side holes 15f and 17f are provided on the inner peripheral surfaces of the discharge side holes 15g and 17g in plan view. Yes. Therefore, the discharge direction of the compressed fluid introduced into the compression side holes 15f and 17f and discharged from the discharge side holes 15g and 17g is made to coincide with the direction along the valve body 25 in advance (see arrow Y in FIG. 3). Can do.

  Further, the valve body 25 is elastically deformed obliquely and opens the discharge ports 15d and 17d when the other end 25b is separated from the discharge ports 15d and 17d while the one end 25a is fixed as described above. Therefore, by discharging the compressed fluid discharged from the discharge side holes 15g and 17g toward the other end 25b of the valve body 25 in the direction of the arrow Y, the valve body 25 is further separated from the discharge ports 15d and 17d. The compressed fluid can be discharged toward the side. Therefore, the pressure loss at the time of discharging the compressed fluid can be reduced.

  Further, by providing the bulging portions 15h and 17h on the inner peripheral surfaces of the discharge side holes 15g and 17g, the distance from the one end 25a of the valve body 25 to the discharge ports 15d and 17d is reduced. It is larger than the distance up to 17f. Therefore, the length from the one end 25a in the valve body 25 to the opening / closing part of the discharge ports 15d and 17d becomes longer. As a result, the valve body 25 is easily elastically deformed, the discharge ports 15d and 17d can be opened larger, and the pressure loss of the compressed fluid during discharge can be further reduced.

  Furthermore, since the durability of the valve body 25 is increased because the valve body 25 is easily elastically deformed, it is possible to avoid deterioration of the sealing performance of the discharge ports 15d and 17d due to long-term use.

  According to the compressor A of the present embodiment, the compression side hole portion is increased by making the opening area of the compression side hole portions 15f and 17f larger than the opening area of the discharge ports 15d and 17d of the discharge side hole portions 15g and 17g. Pressure loss when the compressed fluid is introduced into 15f and 17f can be reduced. On the other hand, since the discharge ports 15d and 17d of the discharge side holes 15g and 17g are small, the valve body 25 is deformed when the discharge ports 15d and 17d are closed by the valve body 25 (to the discharge ports 15d and 17d). It is possible to avoid bending deformation such as fitting. Further, the end plate 15a or the discharge cover 17 of the fixed scroll 15 around the discharge ports 15d and 17d can be easily brought into contact with the valve body 25 with a sufficient area. Therefore, sufficient sealing performance when the discharge ports 15d and 17d are closed by the valve body 25 can be easily ensured.

  Here, if the compression side holes 15f and 17f and the discharge side holes 15g and 17g communicate with each other eccentrically, a portion having a small opening area with an angular shape is likely to be formed in the communication parts 15i and 17i. In this regard, in this embodiment, the opening area of the communication portions 15i, 17i between the compression side holes 15f, 17f and the discharge side holes 15g, 17g is formed to be larger than the cross-sectional area of the discharge side holes 15g, 17g. Therefore, it is possible to secure a sufficient opening area of the communication portions 15i and 17i, reduce pressure loss at the communication portions 15i and 17i, and suppress a decrease in valve strength.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. .
The compression side holes 15f and 17f and the discharge side holes 15g and 17g are not necessarily formed using a drill. For example, as shown in FIG. 4, the discharge side holes 15g and 17g can be formed by an end mill.

Further, as shown in FIG. 5, the end plate 15 a or the discharge cover 17 of the fixed scroll 15 may include main body portions 35 and 37 and a seating plate 31 that is detachably provided on the main body portions 35 and 37. Good.
The seating plate 31 is disposed between the main body portions 35 and 37 and the valve body 25 at a position where the valve body 25 is provided. The seating plate 31 is made of a material harder than the main body portions 35 and 37. Specifically, the main body portions 35 and 37 are made of cast iron, and the seating plate 31 is made of metal such as carbon tool steel (SK material). The valve body 25 is made of, for example, stainless steel.

The compression holes 15 f and 17 f are formed in the main bodies 35 and 37, and the discharge holes 15 g and 17 g are formed in the seating plate 31. That is, the communication portions 15 i and 17 i are provided between the seating plate 31 and the main body portions 35 and 37. Further, the communication portions 15i and 17i are formed with chamfered portions 41 at the opening edge portions on the compression side of the discharge side hole portions 15g and 17g serving as the edge portions. Further, a chamfered portion 42 is formed at the opening edge of the compression side holes 15f and 17f on the discharge side.

Thus, by providing the rigid seating plate 31 and providing the ejection side holes 15g and 17g in the seating plate 31, the surface of the valve body 25 is abutted and supported by the seating plate 31. Therefore, the valve body 25 does not contact the main body portions 35 and 37 when opening and closing, and the main body portions 35 and 37 can be prevented from being damaged.
Furthermore, since the discharge side holes 15g and 17g can be provided in the seating plate 31, the discharge side holes 15g and 17g can be easily offset from the compression side holes 15f and 17f.
Further, since the chamfered portions 41 and 42 are provided, the opening area can be increased at the positions of the chamfered portions 41 and 42, which leads to further reduction of pressure loss. Note that the chamfered portions 41 and 42 are not necessarily provided.

  Further, as long as the centers of the compression side holes 15f and 17f are separated from the one end 25a with respect to the centers of the discharge side holes 15g and 17g, these positions are not limited to the above case. That is, as shown in FIG. 6, the centers P3 of the discharge side holes 15g and 17g are arranged on a straight line connecting the center P1 of the fixed portion (bolt 30) of the one end 25a and the center P2 of the compression side holes 15f and 17f. It does not have to be.

  In the above description, the compression side holes 15f and 17f and the discharge side holes 15g and 17g are formed in a circular shape. However, the compression side holes 15f and 17f, the discharge side holes 15g and 17g, and the discharge ports 15c and 17c are described. The shape such as is not particularly limited, and may be a long hole, an elliptical hole, a square hole, or the like.

  Moreover, it is not necessary to apply the structure of the said embodiment to both the discharge valve mechanism B and the discharge valve mechanism C, and you may apply the structure of the said embodiment to at least one.

DESCRIPTION OF SYMBOLS 1 Housing 1a Housing main 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 Rotating shaft 10 Upper bearing 11 Lower bearing 12 Eccentric pin 15 Fixed scroll 15a End plate 15b Fixed wrap 15c Discharge port 15d Discharge port 15e Valve seat 15f Compression side hole 15g Discharge side hole 15h Swelling portion 15i Communication portion 16 Orbiting scroll 16a End plate 16b Orbiting wrap 17 Discharge cover 17c Discharge port 17d Discharge port 17e Valve seat 17f Compression side hole Portion 17g Discharge side hole 17h Swelling portion 17i Communication portion 19 Intermediate chamber 20 Boss 21 Compression chamber 22 Discharge chamber 25 Valve body 25a One end 25b Other end 26 Retainer 30 Bolt 31 Seating plate 35 Body portion (Base portion body)
37 Main body (base body)
41 Chamfered portion 42 Chamfered portion A Compressor B, C Discharge valve mechanism O1 Axis O2 Axis S1 Vertical direction

Claims (5)

A base that separates the compression side and the discharge side;
A discharge port penetrating the base portion;
One end is fixed to the base portion, the other end faces the discharge port and closes the discharge port. When the pressure on the compression side becomes larger than the pressure on the discharge side, the other end is elastically deformed and the discharge port A valve body that opens,
The discharge port has a compression side hole provided on the compression side, and a discharge side hole provided on the discharge side and communicating with the compression side hole and having a discharge port,
The discharge side hole portion has a bulging portion at a part of the inner peripheral surface at a discharge side end portion that is separated from one end of the valve body in plan view than the inner peripheral surface of the compression side hole portion. Compressor. The discharge side hole is formed with a smaller diameter than the compression side hole, and the center of the discharge side hole is disposed on the side farther from one end of the valve body than the center of the compression side hole. And
The compressor according to claim 1, wherein the bulging portion is a part of an inner peripheral surface of the discharge side hole portion.   The compressor according to claim 1 or 2, wherein an opening area of a communication portion between the compression side hole and the discharge side hole is formed to be equal to or larger than a cross-sectional area of the discharge side hole. The base portion has a base portion main body and a seating plate that is detachable from the base portion main body at a position where the valve body is provided and is made of a material harder than the base portion main body,
The compressor according to any one of claims 1 to 3, wherein the discharge side hole is provided in the seating plate.   The compressor according to any one of claims 1 to 4, wherein a chamfered portion is formed at an edge portion of a communication portion between the compression side hole portion and the discharge side hole portion.

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