Compressor and equipment

Abstract

This compressor includes a pressing plate 80 for mounting a valve pressing component 70 to a fixed member 11. The valve pressing component 70 is formed with an inner cylinder part 71 which is inserted into a communication path 61x, an outer cylinder part 72 to which piping is connected, and an inserted fixed part 73 formed between the inner cylinder part 71 and the outer cylinder part 72. A fixed-part outer diameter D3 of the inserted fixed part 73 is formed larger than an outer-cylinder-part outer diameter D2 of the outer cylinder part 72. The pressing plate 80 is formed with a valve pressing through-hole 81 into which the outer cylinder part 72 is inserted, and a bolt through-hole 82 that allows a fastening bolt 90 to pass through. The fixed member 11 is formed with a recess 11x in which the inserted fixed part 73 is positioned. The valve pressing through-hole 81 is larger than the outer-cylinder-part outer diameter D2 and smaller than the fixed-part outer diameter D3. Therefore, even if attachment of a valve body 62 is forgotten during assembly, it is possible to attach the valve body 62 again, and it is possible to mount the valve pressing component 70, which can be manufactured at low cost and which has good workability.

Description

Compressors and equipment

[0001] The present invention relates to a compressor used in cooling devices such as air conditioners and refrigerators, or refrigeration devices such as heat pump water heaters, and to a device using this compressor.

[0002] In a compressor in which a communication passage connected to the compression chamber is formed in a fixed member that forms the compression chamber and a valve disc is disposed in the communication passage, a valve holding part that restricts movement of the valve disc can be attached to the fixed member by press-fitting the valve holding part into the fixed member or by screwing the valve holding part and the fixed member together (see, for example, Patent Document 1).

[0003] JP 2016-17464 A

[0004] However, with the press-fit fixing method, if the valve disc is forgotten to be assembled, the holding force decreases, so the valve retainer part cannot be removed and re-pressed in. Furthermore, with the screw fixing method, the fixing part needs to be thick enough to create a threaded section, and it is difficult to create a thread groove, which increases manufacturing costs.

[0005] Therefore, the present invention aims to provide a compressor and equipment using this compressor that can be reassembled even if the valve body is forgotten to be assembled, can be manufactured inexpensively, and can install valve holding parts with excellent workability.

[0006] The compressor of the present invention as set forth in claim 1 has a compression mechanism section 10 that forms a compression chamber 15 inside a sealed container 1, and an electric mechanism section 20 that drives the compression mechanism section 10, a communication passage 61 that connects to the compression chamber 15 is formed in a fixed member 11 that forms the compression chamber 15, a valve body 62 is arranged in the communication passage 61, and movement of the valve body 62 is restricted by a valve holding part 70, and has a holding plate 80 that attaches the valve holding part 70 to the fixed member 11, and the valve holding part 70 has an inner cylindrical part 71 that is inserted into the communication passage 61x, and an outer cylindrical part 72 that is connected to a piping. A side tubular portion 72 and a clamping fixing portion 73 formed between the inner tubular portion 71 and the outer tubular portion 72 are formed, the clamping fixing portion outer diameter D3 of the clamping fixing portion 73 is formed larger than the outer tubular portion outer diameter D2 of the outer tubular portion 72, the retaining plate 80 is formed with a valve holding through hole 81 for inserting the outer tubular portion 72 and a bolt through hole 82 for passing a fastening bolt 90, the fixing member 11 is formed with a recess 11x for positioning the clamping fixing portion 73, and the valve holding through hole 81 is larger than the outer tubular portion outer diameter D2 and smaller than the fixing portion outer diameter D3. The present invention according to claim 2 is characterized in that, in the compressor according to claim 1, the recess has a recess depth h2, the clamping fastening portion has a fixing portion thickness h1, the recess depth h2 is equal to the fixing portion thickness h1 of the clamping fastening portion, and the recess inner diameter d4 of the recess 11x is equal to or larger than the fixing portion outer diameter D3. The present invention according to claim 3 is characterized in that, in the compressor according to claim 2, a minute protrusion 73a is provided on the contact surface of the clamping fastening portion 73 with the presser plate 80, and when the protrusion thickness of the minute protrusion 73a is h3, the relationship h2<h1+h3 is satisfied. The present invention of claim 4 is characterized in that, in the compressor of claim 1, the contact surface of the clamping fastener 73 with the presser plate 80 is an inclined surface 73b with the inner diameter side higher than the outer diameter side, and where the recess depth is h2, the fixation portion thickness of the clamping fastener 73 is h1, and the inner diameter side fixation portion thickness of the clamping fastener 73 is δh1, the relationship h2<h1+δh1 is satisfied. The present invention of claim 5 is characterized in that, in the compressor of claim 1, a downward convex portion 83 is formed on the lower surface of the presser plate 80, and the downward convex portion 83 is brought into contact with the contact surface of the clamping fastener 73.The present invention as set forth in claim 6 is the compressor as set forth in claim 1, wherein the inner cylindrical portion outer diameter D1 of the inner cylindrical portion 71 is formed smaller than the outer cylindrical portion outer diameter D2, satisfying the relationship ΦD1<ΦD2. The present invention as set forth in claim 7 is the compressor as set forth in claim 1, wherein an O-ring groove 71a is formed in the inner cylindrical portion 71. The device as set forth in claim 8 is a device using the compressor as set forth in any one of claims 1 to 7, wherein the compressor, the condenser 51, the pressure reducing device 52, and the evaporator 54 are connected in an annular shape by refrigerant piping 55.

[0007] According to the present invention, the valve holding part can be attached to the fixed member by placing a clamping fixing part in the recess, inserting the outer cylindrical part into the valve holding through hole, and fastening the holding plate to the fixed member with a fastening bolt.Even if the valve body is forgotten to be assembled, it can be reassembled, and the product can be manufactured inexpensively and is easy to work with.

[0008] FIG. 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention; FIG. 1 is an enlarged sectional view of a main part of the scroll compressor according to an embodiment of the present invention, and a structural diagram of a valve body; FIG. 1 is a structural diagram of a valve holding part used in the scroll compressor according to an embodiment of the present invention, shown in FIG. 1; FIG. 2 is a structural diagram of a fixed member (fixed scroll) of the scroll compressor according to an embodiment of the present invention;

[0009] A compressor according to a first embodiment of the present invention includes a retainer plate for attaching a valve retainer component to a fixed member, the valve retainer component having an inner cylindrical portion inserted into a communication passage, an outer cylindrical portion to which a pipe is connected, and a clamping fastening portion formed between the inner cylindrical portion and the outer cylindrical portion, the clamping fastening portion having an outer diameter larger than that of the outer cylindrical portion of the outer cylindrical portion, the retainer plate having a valve retainer through-hole for inserting the outer cylindrical portion and a bolt through-hole for passing a fastening bolt, the fixed member having a recess for positioning the clamping fastening portion, the valve retainer through-hole being larger than the outer diameter of the outer cylindrical portion and smaller than the outer diameter of the fixed member, according to this embodiment, the valve retainer component can be attached to the fixed member by placing the clamping fastening portion in the recess, inserting the outer cylindrical portion into the valve retainer through-hole, and fastening the retainer plate to the fixed member with a fastening bolt, thereby enabling reassembly even if a valve disc is forgotten to be attached, enabling low-cost manufacturing and excellent workability.

[0010] In a second embodiment of the present invention, in the compressor according to the first embodiment, the recess has a recess depth h2, the clamping fastening part has a fixed part thickness h1, the recess depth h2 is set to be equal to the fixed part thickness h1 of the clamping fastening part, and the recess inner diameter is set to be equal to or greater than the fixed part outer diameter. According to this embodiment, the valve hold-down part can be held down to the fixed member by the hold-down plate.

[0011] In the compressor of the second embodiment, a minute protrusion is provided on the contact surface of the clamping portion with the retainer plate, and when the thickness of the minute protrusion is taken as h3, the relationship h2

[0012] In a fourth embodiment of the present invention, in the compressor of the first embodiment, the contact surface of the clamping fastener with the retainer plate is an inclined surface with the inner diameter side higher than the outer diameter side, and where the recess depth is h2, the fastener thickness of the clamping fastener is h1, and the inner diameter side fastener thickness of the clamping fastener is δh1, the relationship h2

[0013] ​​In the compressor of the fifth embodiment of the present invention, a downward convex portion is formed on the lower surface of the presser plate, and the downward convex portion is brought into contact with the contact surface of the clamping fixing part. According to this embodiment, the presser plate can reliably press the valve holding part against the fixing member.

[0014] In the sixth embodiment of the present invention, the outer diameter of the inner cylindrical portion is smaller than the outer diameter of the outer cylindrical portion in the compressor of the first embodiment, so that the relationship ΦD1<ΦD2 is satisfied. According to this embodiment, the pressing surface between the clamping fixing portion and the fixing member can be increased, and stable holding can be performed.

[0015] In a seventh embodiment of the present invention, an O-ring groove is formed in the inner cylindrical portion of the compressor according to the first embodiment. According to this embodiment, the O-ring groove can be formed because the compressor is not press-fitted or screwed.

[0016] An apparatus according to an eighth embodiment of the present invention is an apparatus using the compressor according to any one of the first to seventh embodiments, in which the compressor, a condenser, a pressure reducing device, and an evaporator are connected in a ring shape by refrigerant piping. According to this embodiment, it is possible to provide an apparatus with high safety.

[0017] A compressor according to one embodiment of the present invention will be described below. However, the present invention is not limited to this embodiment. In addition, although a scroll compressor is used in this embodiment, a rotary compressor, a reciprocating compressor, or other compressors may also be used. The present invention is also applicable to horizontal compressors and, for example, vehicle-mounted compressors.

[0018] FIG. 1 is a longitudinal cross-sectional view of a scroll compressor according to this embodiment. Arranged within a sealed container 1 are a compression mechanism 10 that compresses a refrigerant, an electric mechanism 20 that drives the compression mechanism 10, and a main shaft 30 that is rotated by the electric mechanism 20 to operate the compression mechanism 10. The sealed container 1 is composed of a cylindrical body 1a extending vertically, an upper lid 1c that closes the upper opening of the body 1a, and a lower lid 1b that closes the lower opening of the body 1a. The sealed container 1 is provided with a refrigerant suction pipe 2 that introduces refrigerant into the compression mechanism 10, a refrigerant discharge pipe 3 that discharges refrigerant compressed by the compression mechanism 10 out of the sealed container 1, and an injection pipe 7 that injects intermediate-pressure refrigerant into the compression mechanism 10. The compression mechanism 10 includes a fixed scroll 11 and an orbiting scroll 12. The orbiting scroll 12 is driven to orbit by the main shaft 30. The electric mechanism 20 includes a stator 21 fixed to the sealed container 1 and a rotor 22 disposed inside the stator 21. A main shaft 30 is fixed to the rotor 22.

[0019] A main bearing 40 that supports the fixed scroll 11 and the orbiting scroll 12 is provided below the fixed scroll 11 and the orbiting scroll 12. The main bearing 40 is formed with a bearing portion 41 that supports the main shaft 30, a boss accommodating portion 42, a ring-shaped recess 43 for sealing, and a ring-shaped recess 45 for a rotation restraining member. The main bearing 40 is fixed to the sealed container 1 by welding or shrink fitting.

[0020] The fixed scroll 11 includes a disk-shaped fixed scroll end plate 11a, a fixed spiral wrap 11b extending from the fixed scroll end plate 11a, and an outer peripheral wall portion 11c extending from the fixed spiral wrap 11b. A discharge port 14 is formed approximately at the center of the fixed scroll end plate 11a. The orbiting scroll 12 includes a disk-shaped orbiting scroll end plate 12a, an orbiting spiral wrap 12b extending from the wrap-side end surface of the orbiting scroll end plate 12a, and a cylindrical boss portion 12c formed on the opposite side of the wrap-side end surface of the orbiting scroll end plate 12a. The fixed spiral wrap 11b of the fixed scroll 11 and the orbiting spiral wrap 12b of the orbiting scroll 12 are intermeshed with each other, forming multiple compression chambers 15 between the fixed spiral wrap 11b and the orbiting spiral wrap 12b. The boss portion 12c is formed approximately at the center of the orbiting scroll end plate 12a. The boss portion 12 c is accommodated in the boss accommodating portion 42 .

[0021] The main shaft 30 is formed with a journal portion 31 disposed in the bearing portion 41, an eccentric shaft 32 inserted into the boss portion 12c, and a main shaft oil supply hole 34 extending from a lower end portion 33 of the main shaft 30 to the eccentric shaft 32. The eccentric shaft 32 is formed at the upper end of the main shaft 30, and the journal portion 31 is formed below the eccentric shaft 32.

[0022] The fixed scroll 11 is fixed to the main bearing 40 at its outer peripheral wall portion 11c using a plurality of bolts 16. On the other hand, the orbiting scroll 12 is supported by the fixed scroll 11 via a rotation restraint member 17 such as an Oldham ring. The rotation restraint member 17, which restrains the rotation of the orbiting scroll 12, is disposed in a ring-shaped recess 45 for the rotation restraint member, and is provided between the fixed scroll 11 and the main bearing 40. This allows the orbiting scroll 12 to orbit without rotating on its own axis relative to the fixed scroll 11. The lower end portion 33 of the main shaft 30 is journaled by an auxiliary bearing 18 disposed at the bottom of the sealed container 1.

[0023] An oil reservoir 4 for storing lubricating oil is formed at the bottom of the sealed container 1. A positive displacement oil pump 5 is provided at the lower end of the main shaft 30. The oil pump 5 is positioned so that its suction port is located within the oil reservoir 4. The oil pump 5 is driven by the main shaft 30. The oil pump 5 can reliably draw up the lubricating oil in the oil reservoir 4 provided at the bottom of the sealed container 1 regardless of the pressure conditions or operating speed, eliminating concerns about running out of oil. The lubricating oil drawn up by the oil pump 5 is supplied to the bearing of the sub-bearing 18, the bearing portion 41, and the boss portion 12c via the main shaft oil supply hole 34 formed in the main shaft 30.

[0024] Refrigerant drawn into the refrigerant suction pipe 2 is guided from the suction port 15a to the compression chamber 15. The compression chamber 15 moves from the outer periphery toward the center while decreasing in volume, and when the refrigerant reaches a predetermined pressure in the compression chamber 15, it is discharged from the discharge port 14 provided in the center of the fixed scroll 11 to the discharge chamber 6. A discharge valve (not shown) is provided in the discharge port 14. When the refrigerant reaches a predetermined pressure in the compression chamber 15, it pushes open the discharge valve and is discharged into the discharge chamber 6. The refrigerant discharged into the discharge chamber 6 is led to the upper part of the sealed container 1, passes through a refrigerant passage (not shown) formed in the compression mechanism 10, reaches the periphery of the electric mechanism 20, and is discharged from the refrigerant discharge pipe 3.

[0025] In the scroll compressor of this embodiment, the boss housing 42 is a high-pressure region, and the outer periphery of the orbiting scroll 12, where the rotation restraint member 17 is disposed, is an intermediate-pressure region. The orbiting scroll 12 is pressed against the fixed scroll 11 by the pressures in the high-pressure and intermediate-pressure regions. The eccentric shaft 32 is inserted into the boss 12c via an orbiting bearing so as to be rotatable. An oil groove 38 is formed in the outer periphery of the eccentric shaft 32. A ring-shaped sealing recess 43 is formed in the thrust surface of the main bearing 40, which receives the thrust force of the orbiting scroll end plate 12a. A ring-shaped sealing member is provided in the ring-shaped sealing recess 43. The sealing member is disposed on the outer periphery of the boss housing 42. The sealed vessel 1 is filled with the same high-pressure refrigerant as the refrigerant discharged into the discharge chamber 6. The main shaft oil supply hole 34 opens to the upper end of the eccentric shaft 32, so that the pressure in the boss 12c is a high-pressure region equivalent to the pressure of the discharged refrigerant. The lubricating oil introduced into the boss portion 12c through the main shaft oil supply hole 34 is supplied to the orbiting bearing and the boss accommodating portion 42 by an oil groove 38 formed on the outer circumferential surface of the eccentric shaft 32. A seal member is provided on the outer periphery of the boss accommodating portion 42, so the boss accommodating portion 42 is a high-pressure region.

[0026] In the compressor of this embodiment, a condenser 51, a pressure reducing device 52, a gas-liquid separator 53, and an evaporator 54 are connected in a ring shape by refrigerant piping 55. The condenser 51 condenses the refrigerant discharged from the discharge pipe 3. The pressure reducing device 52 reduces the pressure of the refrigerant condensed by the condenser 51. The evaporator 54 evaporates the refrigerant reduced in pressure by the pressure reducing device 52. The refrigerant evaporated by the evaporator 54 is returned to the compression mechanism 10 via the refrigerant suction pipe 2. The gas-liquid separator 53 separates the refrigerant condensed by the condenser 51 and reduced in pressure by the pressure reducing device 52 into a partially evaporated gas refrigerant and a liquid refrigerant. The liquid refrigerant further passes through the pressure reducing device 52 to become a low-pressure refrigerant and is guided to the evaporator 54. Meanwhile, the gas refrigerant separated by the gas-liquid separator 53 passes through the injection pipe 7 and is guided to the compression chamber 15, which is in an intermediate-pressure state.

[0027] 2A and 2B are enlarged cross-sectional views of essential parts of the scroll compressor according to the present embodiment shown in FIG. 1 and a diagram illustrating the configuration of the valve body. As shown in FIG. 2A, a fixed scroll 11, which is a fixed member forming the compression chamber 15, has a communication passage 61 connected to the compression chamber 15, and a valve body 62 is disposed in the communication passage 61. In this embodiment, the valve body 62 is a check valve. As shown in FIGS. 2B and 2C, the valve body 62 is a circular plate material and has an opening 62a formed on its outer periphery. The movement of the valve body 62 is restricted by a valve holder 70, and the valve body 62 moves within a predetermined range. An injection pipe (piping) 7 is connected to the valve holder 70.

[0028] As shown in FIG. 2( a), when the valve element 62 is positioned away from the end face of the valve holding member 70, the opening 62a of the valve element 62 is open, and gas refrigerant introduced from the injection pipe 7 passes through the communication passage 61 and is introduced into the compression chamber 15. When the pressure in the compression chamber 15 increases, the valve element 62 is pressed against the end face of the valve holding member 70, and the opening 62a is closed by the end face of the valve holding member 70. The valve holding member 70 is attached to the fixed member (fixed scroll) 11 by a presser plate 80. The presser plate 80 is fixed to the fixed member (fixed scroll) 11 by fastening bolts 90. A recess 11x is formed in the fixed member (fixed scroll) 11. A communication passage 61x is formed in the center of the recess 11x. The communication passage 61x has a larger inner diameter than the communication passage 61.

[0029] Figure 3 shows the configuration of a valve holder component used in the scroll compressor according to the present embodiment shown in Figure 1. Figure 3(a) is a side cross-sectional view of the valve holder component, Figure 3(b) is a plan view of the valve holder component, and Figures 3(c) to 3(e) are enlarged views of section A shown in Figure 3(a). The valve holder component 70 includes an inner cylindrical portion 71 inserted into the communicating passage 61x, an outer cylindrical portion 72 connected to the injection pipe (piping) 7, and a clamping and fixing portion 73 formed between the inner cylindrical portion 71 and the outer cylindrical portion 72. The inner cylindrical portion 71 has an outer diameter D1, the outer cylindrical portion 72 has an outer diameter D2, and the clamping and fixing portion 73 has an outer diameter D3. The fixing portion outer diameter D3 is larger than the outer cylindrical portion outer diameter D2, and the inner cylindrical portion outer diameter D1 is smaller than the outer cylindrical portion outer diameter D2. An O-ring groove 71a is formed on the outer peripheral surface of the inner cylindrical portion 71.

[0030] As shown in FIG. 3( c), the clamping fixation portion 73 has a thickness of h1. FIG. 3( d) shows another embodiment of the clamping fixation portion 73. The clamping fixation portion 73 shown in FIG. 3( d) has a small protrusion 73a on the contact surface of the clamping fixation portion 73 with the pressure plate 80, with a thickness of h1 and a thickness of h3. The small protrusion 73a may be located anywhere on the contact surface of the clamping fixation portion 73 with the pressure plate 80, but it is preferable to provide it on the inner diameter side. FIG. 3( e) shows another embodiment of the clamping fixation portion 73. The contact surface of the clamping fixation portion 73 with the pressure plate 80 is an inclined surface 73b with the inner diameter side higher than the outer diameter side. That is, in the sandwiching fixing portion 73 shown in FIG. 3(e), the outer diameter side has a fixing portion thickness h1, and the inner diameter side has a thickness equal to the fixing portion thickness h1 plus the inner diameter side fixing portion thickness δh1.

[0031] 4A and 4B are diagrams illustrating the configuration of a pressure plate used in this embodiment, with Fig. 4A being a plan view of the pressure plate and Fig. 4B being a side view of the pressure plate. The pressure plate 80 is formed with a valve holder through-hole 81 into which the outer tubular portion 72 is inserted and two bolt through-holes 82 through which fastening bolts 90 are passed. The two bolt through-holes 82 are formed symmetrically with respect to the valve holder through-hole 81. The valve holder through-hole 81 is formed to be larger than the outer diameter D2 of the outer tubular portion and smaller than the outer diameter D3 of the fixed portion.

[0032] FIG. 5 is a structural diagram of a pressure plate according to an embodiment different from that shown in FIG. 4 . FIG. 5( a) is a plan view of the pressure plate, FIG. 5( b) is a side view of the pressure plate, and FIG. 5( c) is an enlarged view of the area A shown in FIG. 5( b). In this embodiment, the pressure plate 80 also has a valve holder through-hole 81 into which the outer tubular portion 72 is inserted and two bolt through-holes 82 through which the fastening bolts 90 are passed. The two bolt through-holes 82 are positioned symmetrically with respect to the valve holder through-hole 81. In this embodiment, a downward convex portion 83 is formed on the underside of the pressure plate 80, on the outer periphery of the valve holder through-hole 81. The downward convex portion 83 is formed in a ring shape within a range of D4 + α, a thickness (height) of β, from the underside of the pressure plate 80. D4 is the diameter of the valve holder through-hole 81, which is greater than the outer diameter D2 of the outer tubular portion and smaller than the outer diameter D3 of the fixing portion.

[0033] 5 shows the downward convex portion 83 formed by a press die, which is formed with an inclined surface. The downward convex portion 83 abuts against the abutment surface of the clamping fixing portion 73. By forming the downward convex portion 83, the valve holding part 70 can be reliably pressed against the fixing member 11 by the pressing plate 80.

[0034] 6 is a structural diagram of the fixed member (fixed scroll) of the scroll compressor according to the present embodiment shown in FIG. 2 . The recess 11x, in which the clamping fixing portion 73 is positioned, is formed with a recess depth h2 and a recess inner diameter d4. According to this embodiment, the valve holding component 70 can be attached to the fixed component 11 by placing the clamping fixing portion 73 in the recess 11x, inserting the outer tubular portion 72 into the valve holding through-hole 81, and fastening the retainer plate 80 to the fixed component 11 with the fastening bolt 90. This allows the valve holding component 70 to be reassembled even if the valve body 62 is forgotten to be assembled, resulting in low-cost manufacturing and excellent workability. Furthermore, according to this embodiment, the recess depth h2 of the recess 11x is set equal to the fixing portion thickness h1 of the clamping fixing portion 73, and the recess inner diameter d4 of the recess 11x is set equal to or greater than the fixing portion outer diameter D3, thereby allowing the retainer plate 80 to hold the valve holding component 70 to the fixed component 11.

[0035] Furthermore, with the sandwiching and fixing portion 73 shown in Fig. 3(d), the relationship between the recess depth h2, the fixing portion thickness h1, and the protruding portion thickness h3 satisfies h2

[0036] Furthermore, according to this embodiment, by forming the outer diameter D1 of the inner cylindrical portion 71 smaller than the outer diameter D2 of the outer cylindrical portion, the pressing surface between the clamping fixing portion 73 and the fixing member 11 can be increased, and stable holding can be achieved. Furthermore, according to this embodiment, since the fixing is not performed by press fitting or screw fastening, an O-ring groove 71a can be formed in the inner cylindrical portion 71, and sealing can be performed by an O-ring. Note that, although this embodiment has been described with the check valve as the valve element 62, the valve element 62 may have other valve structures such as a flow control valve that uses a spring for control. Furthermore, R32 or R410A can be used as the refrigerant, and natural refrigerants such as R290 and CO ２ A refrigerant may also be used.

[0037] ​The compressor of the present invention is useful for appliances such as hot water heating systems, indoor air conditioners, vehicle air conditioners, water heaters, refrigerators, showcases, chillers, and freezers.

[0038] DESCRIPTION OF SYMBOLS 1 Sealed container 1a Body 1b Bottom cover 1c Top cover 2 Refrigerant suction pipe 3 Refrigerant discharge pipe 4 Oil storage section 5 Oil pump 6 Discharge chamber 7 Injection pipe 10 Compression mechanism section 11 Fixed scroll (fixed member) 11a Fixed scroll end plate 11b Fixed spiral wrap 11c Outer circumferential wall section 11x Recess 12 Orbiting scroll 12a Orbiting scroll end plate 12b Orbiting spiral wrap 12c Boss section 14 Discharge port 15 Compression chamber 15a Suction port 16 Bolt 17 Rotation restraining member 18 Sub-bearing 20 Electric mechanism section 21 Stator 22 Rotor 30 Main shaft 31 Journal section 32 Eccentric shaft 33 Lower end section 34 Main shaft oil supply hole 38 Oil groove 40 Main bearing DESCRIPTION OF SYMBOLS 41 Bearing portion 42 Boss accommodating portion 43 Ring-shaped recess for sealing 45 Ring-shaped recess for rotation restraint member 51 Condenser 52 Pressure reducing device 53 Gas-liquid separator 54 Evaporator 55 Refrigerant piping 61 Communication passage 61x Communication passage 62 Valve body 62a Opening 70 Valve holding part 71 Inner cylindrical portion 71a O-ring groove 72 Outer cylindrical portion 73 Clamping fixing portion 73a Minute convex portion 73b Inclined surface 80 Holding plate 81 Valve holding through hole 82 Bolt through hole 83 Downward convex portion 90 Fastening bolt d4 Inner diameter of recess D1 Outer diameter of inner cylindrical portion D2 Outer diameter of outer cylindrical portion D3 Outer diameter of fixed portion D4 Diameter h1 Thickness of fixed portion h2 Depth of recess h3 Thickness of convex portion δh1 Thickness of the inner diameter fixing part of the clamping fixing part

Claims

1. A compressor having a compression mechanism that forms a compression chamber inside a sealed container and an electric mechanism that drives the compression mechanism, wherein a communication passage leading to the compression chamber is formed in a fixed member that forms the compression chamber, a valve disc is disposed in the communication passage, and movement of the valve disc is restricted by a valve holder part, wherein the compressor has a presser plate that attaches the valve holder part to the fixed member, wherein the valve holder part is formed with an inner cylindrical part that is inserted into the communication passage, an outer cylindrical part to which a pipe is connected, and a clamping fixing part that is formed between the inner cylindrical part and the outer cylindrical part, the clamping fixing part has an outer diameter that is larger than the outer diameter of the outer cylindrical part of the outer cylindrical part, the presser plate is formed with a valve holder through-hole through which the outer cylindrical part is inserted and a bolt through-hole through which a fastening bolt is passed, and the fixed member has a recess in which the clamping fixing part is positioned, and the valve holder through-hole is larger than the outer diameter of the outer cylindrical part and smaller than the outer diameter of the fixed part.

2. The compressor according to claim 1, characterized in that the recess has a depth h2, the clamping fixing portion has a thickness h1, the recess depth h2 is equal to the fixing portion thickness h1, and the recess inner diameter is equal to or greater than the fixing portion outer diameter.

3. The compressor according to claim 2, characterized in that a minute protrusion is provided on the contact surface of the clamping fixing part with the pressing plate, and when the thickness of the minute protrusion is h3, the following relationship is satisfied: h2<h1+h3.

4. The compressor according to claim 1, characterized in that the contact surface of the clamping portion with the pressure plate is an inclined surface with the inner diameter side being higher than the outer diameter side, and where the recess depth is h2, the thickness of the clamping portion of the clamping portion is h1, and the thickness of the clamping portion on the inner diameter side is δh1, the relationship h2<h1+δh1 is satisfied.

5. The compressor according to claim 1, characterized in that a downward convex portion is formed on the lower surface of the pressing plate, and the downward convex portion is brought into contact with the contact surface of the clamping fixing portion.

6. The compressor according to claim 1, wherein the outer diameter of the inner cylindrical portion is smaller than the outer diameter of the outer cylindrical portion, so that the relationship ΦD1<ΦD2 holds.

7. The compressor according to claim 1, wherein an O-ring groove is formed in the inner cylindrical portion.

8. Equipment using the compressor according to any one of claims 1 to 7, characterized in that the compressor, condenser, pressure reducing device, and evaporator are connected in a circular configuration by refrigerant piping.

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