JP6201341B2 - Rotary Compressor - Google Patents

Rotary Compressor Download PDF

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Publication number
JP6201341B2
JP6201341B2 JP2013039429A JP2013039429A JP6201341B2 JP 6201341 B2 JP6201341 B2 JP 6201341B2 JP 2013039429 A JP2013039429 A JP 2013039429A JP 2013039429 A JP2013039429 A JP 2013039429A JP 6201341 B2 JP6201341 B2 JP 6201341B2
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cylinder
discharge
discharge valve
refrigerant
hole
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JP2014167283A (en
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浩志 鵜飼
浩志 鵜飼
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株式会社富士通ゼネラル
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Description

  The present invention relates to a rotary compressor used for an air conditioner, for example.
  Conventionally, the lower end plate 160S and the upper end plate 160T of the compression section 12 (see FIG. 1) of the rotary compressor 1 have reed valve type first and second discharge valves that open and close the first and second discharge holes 190S and 190T. 200S, 200T and first and second discharge valve pressers 901S, 901T (see FIG. 8) for limiting the deflection opening amounts of the first and second discharge valves 200S, 200T are accommodated, and the first and second rivets First and second groove portions 163S and 163T are formed for attachment by 203S and 203T (see FIG. 8).
  The diameters (widths) of the first and second groove portions 163S and 163T on the first and second discharge holes 190S and 190T sides are enlarged to form first and second discharge hole side enlarged portions 163Sb and 163Tb. . The diameters (widths) of the first and second discharge hole side enlarged diameter portions 163Sb and 163Tb are enlarged and discharged from the first and second discharge holes 190S and 190T. This is to secure a flow path for the compressed refrigerant gas that is ejected by pushing the valves 200S and 200T open.
  The gap in the width direction between the first and second groove portions 163S and 163T and the first and second discharge valves 200S and 200T and the first and second discharge valve pressers 901S and 901T is about 0.1 mm to 0.3 mm. Yes, the gap is narrowed. This is because when the first and second discharge valves 200S and 200T are dropped into the first and second groove portions 163S and 163T, the first and second discharge valves 200S and 200T become the first and second discharge holes 190S and 190T, respectively. This is so as not to deviate from.
  Conventionally, a cylinder chamber is formed by a cylinder and a bearing tool (end plate), the refrigerant gas sucked into the cylinder chamber is compressed, and a discharge valve provided in the bearing tool is opened to discharge the cylinder gas. In a compressor (rotary compressor), a recess (groove) is provided in the bearing tool, a valve presser is press-fitted and fixed in the recess (groove), and the discharge valve is interposed between the valve presser and the bearing recess (groove). A hermetic compressor (rotary compressor) is disclosed that is openable and closable. The valve retainer and the discharge valve are provided with mounting holes. A mounting bolt for mounting the bearing tool (end plate) to the cylinder is inserted into the mounting hole, and together with the bearing tool (end plate), the valve presser and discharge A valve is attached and fixed to the cylinder (for example, see Patent Document 1).
JP-A-8-200264
  However, according to the conventional technique described with reference to FIG. 8 and the conventional technique described in Patent Document 1, the lateral gap between the groove and the discharge valve holder is narrow, so that the rivet caulking or the mounting bolt By tightening, the discharge valve presser is compressed, the shaft end of the rivet is crushed and the diameter of the shaft increases, and the discharge valve presser expands in the width direction to press the inner wall of the groove. Therefore, there is a problem that the end plate is distorted, the flatness of the cylinder contact surface is deteriorated, and the adhesion and airtightness between the cylinder contact surface of the end plate and the cylinder are lowered.
  The present invention has been made in view of the above, and an object of the present invention is to obtain a rotary compressor in which even if a discharge valve and a discharge valve presser are assembled to a groove portion of an end plate by a rivet, the end plate is distorted. To do.
In order to solve the above-described problems and achieve the object, the present invention includes a vertically mounted compressor housing that is provided with a refrigerant discharge portion at an upper portion and a refrigerant suction portion at a lower side surface and sealed. An annular cylinder, an end plate that has a bearing portion and a discharge valve portion and closes the end portion of the cylinder, and an eccentric portion of a rotating shaft supported by the bearing portion are disposed at the lower portion of the compressor housing. An annular piston that is fitted and revolves along the cylinder inner wall of the cylinder to form a working chamber with the cylinder inner wall, and protrudes into the working chamber from the vane groove of the cylinder to the annular piston. A compression section that abuts and divides the working chamber into a suction chamber and a compression chamber, sucks refrigerant through the suction section, and discharges the refrigerant from the discharge section through the compressor housing, and the compression Placed at the top of the machine casing In the rotary compressor and a motor for driving the compression unit through the rotary shaft, in the vicinity of the rivet hole of the discharge valve retainer constituting the discharge valve unit, the hollow portions provided, the lightening portion And a rectangular hole provided on the discharge hole side of the rivet hole, and a rectangular notch provided on the counter discharge hole side .
  According to the present invention, even when the discharge valve and the discharge valve retainer are assembled to the groove portion of the end plate by rivets, the end plate is distorted and the flatness is deteriorated, and the adhesion and airtightness between the end plate and the cylinder are reduced. There is nothing.
FIG. 1 is a longitudinal sectional view showing an embodiment of a rotary compressor according to the present invention. FIG. 2 is a cross-sectional view seen from above the first and second compression portions of the embodiment. FIG. 3 is a plan view showing the first and second discharge valve holders according to the first embodiment. FIG. 4 is a plan view showing first and second discharge valve pressers according to the second embodiment. FIG. 5 is a plan view showing first and second discharge valve pressers according to the third embodiment. FIG. 6 is a plan view showing first and second discharge valve pressers according to the fourth embodiment. FIG. 7 is a plan view showing first and second discharge valve holders according to the fifth embodiment. FIG. 8 is a partial plan view of the lower end plate after assembling conventional first and second discharge valves and first and second discharge valve pressers.
  Embodiments of a rotary compressor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
  FIG. 1 is a longitudinal sectional view showing an embodiment of a rotary compressor according to the present invention, and FIG. 2 is a transverse sectional view seen from above the first and second compression portions of the embodiment.
  As shown in FIG. 1, the rotary compressor 1 according to the embodiment is disposed at a lower portion of a sealed vertical cylindrical compressor housing 10 and an upper portion of the compressor housing 10. And a motor 11 that drives the compression unit 12 via the rotary shaft 15.
  The stator 111 of the motor 11 is formed in a cylindrical shape, and is fixed by being shrink-fitted on the inner peripheral surface of the compressor housing 10. The rotor 112 of the motor 11 is disposed inside the cylindrical stator 111 and is fixed by being shrink-fitted to a rotating shaft 15 that mechanically connects the motor 11 and the compression unit 12.
  The compression unit 12 includes a first compression unit 12S and a second compression unit 12T that is arranged in parallel with the first compression unit 12S and stacked on the upper side of the first compression unit 12S. As shown in FIG. 2, the first and second compression parts 12S and 12T are arranged on the first and second side projecting parts 122S and 122T in a radial manner with the first and second suction holes 135S and 135T, , Annular first and second cylinders 121S and 121T provided with second vane grooves 128S and 128T are provided.
  As shown in FIG. 2, circular first and second cylinder inner walls 123 </ b> S and 123 </ b> T are formed in the first and second cylinders 121 </ b> S and 121 </ b> T concentrically with the rotating shaft 15 of the motor 11. In the first and second cylinder inner walls 123S and 123T, first and second annular pistons 125S and 125T having an outer diameter smaller than the cylinder inner diameter are arranged, respectively, and the first and second cylinder inner walls 123S and 123T, The first and second working chambers 130S and 130T are formed between the first and second annular pistons 125S and 125T for sucking, compressing and discharging the refrigerant gas.
  First and second vane grooves 128S and 128T are formed in the first and second cylinders 121S and 121T in the radial direction from the first and second cylinder inner walls 123S and 123T over the entire cylinder height. Flat plate-like first and second vanes 127S and 127T are slidably fitted into the second vane grooves 128S and 128T, respectively.
  As shown in FIG. 2, the first and second vane grooves 128S and 128T are communicated with the first and second vane grooves 128S and 128T from the outer periphery of the first and second cylinders 121S and 121T at the back of the first and second vane grooves 128S and 128T. First and second spring holes 124S and 124T are formed. First and second vane springs (not shown) that press the back surfaces of the first and second vanes 127S and 127T are inserted into the first and second spring holes 124S and 124T.
  When the rotary compressor 1 is started, the first and second vane 127S and 127T are moved from the inside of the first and second vane grooves 128S and 128T by the repulsive force of the first and second vane springs. The first and second working chambers 130S, 130T are protruded into the working chambers 130S, 130T, their tips abutting against the outer peripheral surfaces of the first and second annular pistons 125S, 125T, and the first and second vanes 127S, 127T. 130T is partitioned into first and second suction chambers 131S and 131T and first and second compression chambers 133S and 133T.
  In addition, the first and second cylinders 121S and 121T communicate with the inner portions of the first and second vane grooves 128S and 128T and the interior of the compressor housing 10 through the opening R shown in FIG. First and second pressure introducing passages 129S and 129T are formed in which the compressed refrigerant gas in the housing 10 is introduced and back pressure is applied to the first and second vanes 127S and 127T by the pressure of the refrigerant gas. .
  In the first and second cylinders 121S and 121T, the first and second suction chambers 131S and 131T communicate with the outside in order to suck the refrigerant from the outside into the first and second suction chambers 131S and 131T. Second suction holes 135S and 135T are provided.
  Further, as shown in FIG. 1, an intermediate partition plate 140 is disposed between the first cylinder 121S and the second cylinder 121T, and the first working chamber 130S (see FIG. 2) of the first cylinder 121S and the second cylinder. The second working chamber 130T (see FIG. 2) of 121T is partitioned and closed. A lower end plate 160S is disposed at the lower end of the first cylinder 121S, and closes the first working chamber 130S of the first cylinder 121S. An upper end plate 160T is disposed at the upper end portion of the second cylinder 121T, and closes the second working chamber 130T of the second cylinder 121T.
  A sub-bearing portion 161S is formed on the lower end plate 160S, and the sub-shaft portion 151 of the rotary shaft 15 is rotatably supported by the sub-bearing portion 161S. A main bearing portion 161T is formed on the upper end plate 160T, and the main shaft portion 153 of the rotary shaft 15 is rotatably supported by the main bearing portion 161T.
  The rotating shaft 15 includes a first eccentric portion 152S and a second eccentric portion 152T that are eccentric with a phase difference of 180 ° from each other. The first eccentric portion 152S is connected to the first annular piston 125S of the first compression portion 12S. The second eccentric portion 152T is rotatably fitted to the second annular piston 125T of the second compression portion 12T.
  When the rotary shaft 15 rotates, the first and second annular pistons 125S and 125T move in the first and second cylinders 121S and 121T counterclockwise in FIG. 2 along the first and second cylinder inner walls 123S and 123T. Revolving and following this, the first and second vanes 127S and 127T reciprocate. Due to the movement of the first and second annular pistons 125S and 125T and the first and second vanes 127S and 127T, the volumes of the first and second suction chambers 131S and 131T and the first and second compression chambers 133S and 133T are continuous. The compressor 12 continuously sucks, compresses and discharges the refrigerant gas.
  As shown in FIG. 1, a lower muffler cover 170S is arranged below the lower end plate 160S, and a lower muffler chamber 180S is formed between the lower end plate 160S and the lower muffler cover 170S. And the 1st compression part 12S is opened to lower muffler room 180S. That is, a first discharge hole 190S (see FIG. 2) that connects the first compression chamber 133S of the first cylinder 121S and the lower muffler chamber 180S is provided in the vicinity of the first vane 127S of the lower end plate 160S. In the hole 190S, a reed valve type first discharge valve 200S for preventing the backflow of the compressed refrigerant gas is disposed.
  The lower muffler chamber 180S is one chamber formed in an annular shape, and the lower end plate 160S, the first cylinder 121S, the intermediate partition plate 140, the second cylinder 121T, and the upper end plate 160T are arranged on the discharge side of the first compression unit 12S. This is a part of the communication passage that communicates with the upper muffler chamber 180T through the refrigerant passage 136 (see FIG. 2) that passes through the upper muffler chamber. The lower muffler chamber 180S reduces the pressure pulsation of the discharged refrigerant gas. In addition, a first discharge valve presser 201S for limiting the amount of deflection opening of the first discharge valve 200S is fixed to the first discharge valve 200S by a rivet together with the first discharge valve 200S. The first discharge hole 190S, the first discharge valve 200S, and the first discharge valve presser 201S constitute a first discharge valve portion of the lower end plate 160S.
  As shown in FIG. 1, an upper muffler cover 170T is arranged above the upper end plate 160T, and an upper muffler chamber 180T is formed between the upper end plate 160T and the upper muffler cover 170T. In the vicinity of the second vane 127T of the upper end plate 160T, a second discharge hole 190T (see FIG. 2) that communicates the second compression chamber 133T of the second cylinder 121T and the upper muffler chamber 180T is provided, and the second discharge hole 190T. Is provided with a reed valve type second discharge valve 200T for preventing the backflow of the compressed refrigerant gas. In addition, a second discharge valve presser 201T for limiting the deflection opening amount of the second discharge valve 200T is fixed to the second discharge valve 200T by a rivet together with the second discharge valve 200T. The upper muffler chamber 180T reduces the pressure pulsation of the discharged refrigerant. The second discharge hole 190T, the second discharge valve 200T, and the second discharge valve presser 201T constitute a second discharge valve portion of the upper end plate 160T. Details of the first and second discharge valve pressers 201S and 201T will be described later.
  The first cylinder 121S, the lower end plate 160S, the lower muffler cover 170S, the second cylinder 121T, the upper end plate 160T, the upper muffler cover 170T, and the intermediate partition plate 140 are integrally fastened by a plurality of through bolts 175 and the like. Out of the compression portion 12 that is integrally fastened by a through bolt 175 or the like, the outer peripheral portion of the upper end plate 160T is fixed to the compressor housing 10 by spot welding, and the compression portion 12 is fixed to the compressor housing 10. .
  The first and second through holes 101 and 102 are passed through the outer peripheral wall of the cylindrical compressor housing 10 in order from the lower part in the axial direction so as to pass the first and second suction pipes 104 and 105. Is provided. In addition, an accumulator 25 formed of an independent cylindrical sealed container is held by an accumulator holder 252 and an accumulator band 253 on the outer side of the compressor housing 10.
  A system connection tube 255 connected to the evaporator of the refrigeration cycle is connected to the center of the top of the accumulator 25, and one end of the bottom through hole 257 provided at the bottom of the accumulator 25 extends to the upper part inside the accumulator 25. The other ends of the first and second suction pipes 104 and 105 are connected to the first and second low-pressure communication pipes 31S and 31T.
  The first and second low-pressure connecting pipes 31S and 31T that guide the low-pressure refrigerant of the refrigeration cycle to the first and second compression parts 12S and 12T through the accumulator 25 are the first and second suction pipes 104, The first and second cylinders 121S and 121T are connected to the first and second suction holes 135S and 135T (see FIG. 2) via the 105. That is, the first and second suction holes 135S and 135T are connected in parallel to the evaporator of the refrigeration cycle.
  Connected to the top of the compressor housing 10 is a discharge pipe 107 that is connected to the refrigeration cycle and discharges high-pressure refrigerant gas to the condenser side of the refrigeration cycle. That is, the first and second discharge holes 190S and 190T are connected to the condenser of the refrigeration cycle.
  Lubricating oil is sealed in the compressor housing 10 up to the height of the second cylinder 121T. Further, the lubricating oil is sucked up from the oil supply pipe 16 attached to the lower end portion of the rotating shaft 15 by a blade pump (not shown) inserted in the lower portion of the rotating shaft 15, circulates through the compressing portion 12, and slides. The moving parts are lubricated and a minute gap in the compression portion 12 is sealed.
  Next, the first and second discharge valve pressers, which are characteristic configurations of the rotary compressor 1 of the embodiment, will be described with reference to FIG. FIG. 3 is a plan view showing the first and second discharge valve holders according to the first embodiment. As shown in FIG. 3, the first and second discharge valve holders 201S and 201T of the first embodiment are formed in a rectangular shape with a corner in plan view, and the first and second rivet holes 201Sa, 201Ta is provided, and the first and second refrigerant gas vent holes 201Sb and 201Tb are provided on the discharge hole side, and are warped from the back side to the front side in FIG.
  The first and second refrigerant gas vent holes 201Sb and 201Tb are connected to the first and second discharge valves 200S and 200T when the first and second discharge valves 200S and 200T (see FIG. 1) are opened and closed. The refrigerant gas staying between the discharge valve holders 201S and 201T is released, or the refrigerant gas is supplied between the first and second discharge valve holders 201S and 201T, so that the first and second discharges are performed. This is to reduce the valve opening / closing resistance of the valves 200S and 200T.
  Rectangular holes 201Sc and 201Tc are provided as thinning portions on the discharge hole side near the first and second rivet holes 201Sa and 201Ta, and rectangular notches as thinning portions are provided on the counter discharge hole side. 201Sd and 201Td are provided. The holes 201Sc and 201Tc and the notches 201Sd and 201Td may be through-holes penetrating in the thickness direction of the first and second discharge valve pressers 201S and 201T, or may be bottomed holes in the thickness direction.
  The first and second discharge valves 200S and 200T and the first and second discharge valve pressers 201S and 201T are inserted into the first and second groove portions 163S and 163T (see FIG. 8), and the first and second rivets are inserted. When 203S and 203T (see FIG. 8) are inserted into the first and second rivet holes 201Sa and 201Ta and crimped, the shaft portions of the first and second rivets 203S and 203T are compressed and the shaft end portions are crushed. Although the diameter of the upper part of the shaft portion is increased, the wall portions between the first and second rivet holes 201Sa and 201Ta and the holes 201Sc and 201Tc and the notches 201Sd and 201Td are easily deformed thinly. The shaft portions of the rivets 203S and 203T are increased in diameter in the direction of the holes 201Sc and 201Tc and the notches 201Sd and 201Td, and are deformed into an elliptical shape. The first and second discharge valve pressers 201S and 201 There first expands in the width direction, the second groove 163S, not pressing the inner wall of 163t. Accordingly, the lower and upper end plates 160S and 160T are distorted and the flatness of the cylinder contact surface is deteriorated, and the adhesion between the cylinder contact surfaces of the lower and upper end plates 160S and 160T and the first and second cylinders 121S and 121T, Airtightness is not reduced.
  FIG. 4 is a plan view showing first and second discharge valve pressers according to the second embodiment. As shown in FIG. 4, the first and second discharge valve pressers 301S and 301T according to the second embodiment have a thinned portion on the discharge hole side and the counter discharge hole side in the vicinity of the first and second rivet holes 201Sa and 201Ta. Arc-shaped holes 301Sc and 301Tc are provided. The holes 301Sc and 301Tc may be through-holes penetrating in the thickness direction of the first and second discharge valve holders 301S and 301T, or may be bottomed holes in the thickness direction.
  The first and second discharge valves 200S and 200T and the first and second discharge valve pressers 301S and 301T are inserted into the first and second groove portions 163S and 163T (see FIG. 8), and the first and second rivets are inserted. When 203S and 203T (see FIG. 8) are inserted into the first and second rivet holes 201Sa and 201Ta and crimped, the shaft portions of the first and second rivets 203S and 203T are compressed and the shaft end portions are crushed. Although the diameter of the upper portion of the shaft portion increases, the wall portion between the first and second rivet holes 201Sa and 201Ta and the holes 301Sc and 301Tc is thin and easily deformed, so the shafts of the first and second rivets 203S and 203T The portion increases in diameter in the direction of the holes 301Sc and 301Tc and deforms into an oval shape, and the first and second discharge valve holders 301S and 301T expand in the width direction to form inner walls of the first and second groove portions 163S and 163T. Press Rukoto is not.
  FIG. 5 is a plan view showing first and second discharge valve pressers according to the third embodiment. As shown in FIG. 5, the first and second discharge valve retainers 401S and 401T of the third embodiment have a lightening portion on the discharge hole side and the counter discharge hole side in the vicinity of the first and second rivet holes 201Sa and 201Ta. Are provided with circular holes 401Sc and 401Tc. The holes 401Sc and 401Tc may be through holes penetrating in the thickness direction of the first and second discharge valve holders 401S and 401T, or may be bottomed holes in the thickness direction.
  The first and second discharge valves 200S and 200T and the first and second discharge valve pressers 401S and 401T are inserted into the first and second groove portions 163S and 163T (see FIG. 8), and the first and second rivets are inserted. When 203S and 203T (see FIG. 8) are inserted into the first and second rivet holes 201Sa and 201Ta and crimped, the shaft portions of the first and second rivets 203S and 203T are compressed and the shaft end portions are crushed. Although the diameter of the upper portion of the shaft portion increases, the wall portion between the first and second rivet holes 201Sa and 201Ta and the holes 401Sc and 401Tc is thin and easily deformed, so the shaft of the first and second rivets 203S and 203T The portion increases in diameter in the direction of the holes 401Sc and 401Tc and deforms into an elliptical shape, and the first and second discharge valve holders 401S and 401T expand in the width direction, and the inner walls of the first and second groove portions 163S and 163T Press Rukoto is not.
  FIG. 6 is a plan view showing first and second discharge valve pressers according to the fourth embodiment. As shown in FIG. 6, a plurality of circular small holes 501 Sc are formed around the vicinity of the first and second rivet holes 201 Sa and 201 Ta of the first and second discharge valve pressers 501 S and 501 T of the fourth embodiment as a thinned portion. , 501Tc are provided at equal intervals. The holes 501Sc and 501Tc may be through holes penetrating in the thickness direction of the first and second discharge valve holders 501S and 501T, or may be bottomed holes in the thickness direction.
  The first and second discharge valves 200S and 200T and the first and second discharge valve pressers 501S and 501T are inserted into the first and second groove portions 163S and 163T (see FIG. 8), and the first and second rivets are inserted. When 203S and 203T (see FIG. 8) are inserted into the first and second rivet holes 201Sa and 201Ta and crimped, the shaft portions of the first and second rivets 203S and 203T are compressed and the shaft end portions are crushed. Although the diameter of the upper portion of the shaft portion increases, the wall portion between the first and second rivet holes 201Sa and 201Ta and the holes 501Sc and 501Tc is thin and easily deformed, so the shafts of the first and second rivets 203S and 203T When the diameter of the portion increases, the holes 501Sc and 501Tc are not crushed, and the first and second discharge valve retainers 501S and 501T do not expand in the width direction and press the inner walls of the first and second groove portions 163S and 163T.
  FIG. 7 is a plan view showing first and second discharge valve holders according to the fifth embodiment. As shown in FIG. 7, the first and second discharge valve retainers 601S and 601T of the fifth embodiment have semicircular cuts as thinning portions on both sides in the vicinity of the first and second rivet holes 201Sa and 201Ta. Notches 601Sd and 601Td are provided. The notches 601Sd and 601Td may be provided in the entire thickness direction of the first and second discharge valve pressers 601S and 601T, or may be provided only in a partial region in the thickness direction.
  The first and second discharge valves 200S and 200T and the first and second discharge valve pressers 601S and 601T are inserted into the first and second groove portions 163S and 163T (see FIG. 8), and the first and second rivets are inserted. When 203S and 203T (see FIG. 8) are inserted into the first and second rivet holes 201Sa and 201Ta and crimped, the shaft portions of the first and second rivets 203S and 203T are compressed and the shaft end portions are crushed. Although the diameter of the upper portion of the shaft portion increases, even if the first and second discharge valve retainers 601S and 601T expand in the width direction due to the increase in the diameter of the shaft portion, both sides are semicircular as a thinned portion. Since the notches 601Sd and 601Td are provided and have a narrow width, the inner walls of the first and second groove portions 163S and 163T are not pressed.
  According to the configuration of the discharge valve portion of the first to fifth embodiments described above, since the lightening portion is provided in the vicinity of the rivet hole of the discharge valve presser, the shaft portion is compressed by crimping the rivet and the shaft end portion. Even if the diameter of the upper portion of the shaft portion increases as the material is crushed, the discharge valve presser does not expand in the width direction and does not press the inner wall of the groove portion of the end plate. Therefore, the end plate is distorted and the flatness is deteriorated, and the adhesion and airtightness between the end plate and the cylinder are not lowered.
  As described above, the twin rotary compressor including the first and second compression units 12S and 12T has been described as an embodiment of the present invention. However, the present invention is a single rotary compressor having a single compression unit and the first compression unit. This can also be applied to a two-stage compression rotary compressor that further compresses the discharged refrigerant in the second compression section.
DESCRIPTION OF SYMBOLS 1 Rotary compressor 10 Compressor housing | casing 11 Motor 12 Compression part 15 Rotating shaft 16 Oil supply pipe 25 Accumulator 31S 1st low-pressure connection pipe (low-pressure connection pipe)
31T Second low pressure connection pipe (low pressure connection pipe)
101 First through hole (through hole)
102 Second through hole (through hole)
104 1st suction pipe (suction pipe, suction part)
105 Second suction pipe (suction pipe, suction part)
107 Discharge pipe (discharge section)
111 Stator 112 Rotor 12S 1st compression part (compression part)
12T 2nd compression part (compression part)
121S 1st cylinder (cylinder)
121T 2nd cylinder (cylinder)
122S first lateral overhang (side overhang)
122T Second lateral overhang (side overhang)
123S 1st cylinder inner wall (cylinder inner wall)
123T 2nd cylinder inner wall (cylinder inner wall)
124S 1st spring hole (spring hole)
124T Second spring hole (spring hole)
125S first annular piston (annular piston)
125T second annular piston (annular piston)
127S 1st vane (vane)
127T 2nd vane (vane)
128S 1st vane groove (vane groove)
128T 2nd vane groove (vane groove)
129S First pressure introduction path (pressure introduction path)
129T Second pressure introduction path (pressure introduction path)
130S 1st working chamber (working chamber)
130T second working chamber (working chamber)
131S First suction chamber (suction chamber)
131T Second suction chamber (suction chamber)
133S 1st compression chamber (compression chamber)
133T Second compression chamber (compression chamber)
135S 1st suction hole (suction hole)
135T 2nd suction hole (suction hole)
136 Refrigerant passage 140 Intermediate partition plate 151 Secondary shaft portion 152S First eccentric portion (eccentric portion)
152T second eccentric part (eccentric part)
153 Main shaft portion 160S Lower end plate (end plate)
160T Top plate (end plate)
161S Sub bearing part (bearing part)
161T Main bearing (bearing)
163S 1st groove part (groove part)
163T second groove (groove)
163Sb first discharge hole side enlarged portion (discharge hole side enlarged portion)
163Tb second discharge hole side enlarged portion (discharge hole side enlarged portion)
170S Lower muffler cover (muffler cover)
170T Upper muffler cover (muffler cover)
175 Through bolt 180S Lower muffler chamber (muffler chamber)
180T Upper muffler room (muffler room)
190S 1st discharge hole (discharge hole)
190T Second discharge hole (discharge hole)
200S 1st discharge valve (discharge valve)
200T Second discharge valve (discharge valve)
201S, 301S, 401S, 501S, 601S, 901S First discharge valve presser (discharge valve presser)
201T, 301T, 401T, 501T, 601T, 901T Second discharge valve presser (discharge valve presser)
201Sa 1st rivet hole (rivet hole)
201Ta 2nd rivet hole (rivet hole)
201Sb first refrigerant gas vent hole (refrigerant gas vent hole)
201Tb Second refrigerant gas vent hole (refrigerant gas vent hole)
201Sc, 301Sc, 401Sc, 501Sc Hole (thickening part)
201Tc, 301Tc, 401Tc, 501Tc Hole (thickening part)
201Sd, 601Sd Notch (Meat extraction part)
201Td, 601Td Notch (Meat extraction part)
203S 1st rivet (rivet)
203T 2nd rivet (rivet)
252 Accum holder 253 Accum band 255 System connection pipe 257 Bottom through-hole R Opening of first and second pressure introduction passages

Claims (3)

  1. A vertically mounted compressor housing which is provided with a refrigerant discharge part at the top and a refrigerant suction part at the bottom side and is sealed;
    An annular cylinder, an end plate that has a bearing portion and a discharge valve portion and closes an end portion of the cylinder, and an eccentric portion of a rotating shaft supported by the bearing portion, which is disposed at a lower portion of the compressor housing An annular piston that revolves along the cylinder inner wall of the cylinder and forms a working chamber between the cylinder inner wall and the annular piston that projects from the vane groove of the cylinder into the working chamber. And a vane that divides the working chamber into a suction chamber and a compression chamber, sucks the refrigerant through the suction portion, and discharges the refrigerant from the discharge portion through the compressor housing,
    A motor that is disposed at the top of the compressor housing and drives the compression unit via the rotating shaft;
    A rotary compressor comprising:
    In the vicinity of the rivet hole of the discharge valve presser constituting the discharge valve portion, a lightening portion is provided,
    2. The rotary compressor according to claim 1, wherein the lightening portion includes a rectangular hole provided on the discharge hole side of the rivet hole and a rectangular notch provided on the counter discharge hole side.
  2. A vertically mounted compressor housing which is provided with a refrigerant discharge part at the top and a refrigerant suction part at the bottom side and is sealed;
    An annular cylinder, an end plate that has a bearing portion and a discharge valve portion and closes an end portion of the cylinder, and an eccentric portion of a rotating shaft supported by the bearing portion, which is disposed at a lower portion of the compressor housing An annular piston that revolves along the cylinder inner wall of the cylinder and forms a working chamber between the cylinder inner wall and the annular piston that projects from the vane groove of the cylinder into the working chamber. And a vane that divides the working chamber into a suction chamber and a compression chamber, sucks the refrigerant through the suction portion, and discharges the refrigerant from the discharge portion through the compressor housing,
    A motor that is disposed at the top of the compressor housing and drives the compression unit via the rotating shaft;
    A rotary compressor comprising:
    In the vicinity of the rivet hole of the discharge valve presser constituting the discharge valve portion, a lightening portion is provided,
    2. The rotary compressor according to claim 1, wherein the lightening portion includes arc-shaped holes provided on the discharge hole side and the counter discharge hole side of the rivet hole.
  3. A vertically mounted compressor housing which is provided with a refrigerant discharge part at the top and a refrigerant suction part at the bottom side and is sealed;
    An annular cylinder, an end plate that has a bearing portion and a discharge valve portion and closes an end portion of the cylinder, and an eccentric portion of a rotating shaft supported by the bearing portion, which is disposed at a lower portion of the compressor housing An annular piston that revolves along the cylinder inner wall of the cylinder and forms a working chamber between the cylinder inner wall and the annular piston that projects from the vane groove of the cylinder into the working chamber. And a vane that divides the working chamber into a suction chamber and a compression chamber, sucks the refrigerant through the suction portion, and discharges the refrigerant from the discharge portion through the compressor housing,
    A motor that is disposed at the top of the compressor housing and drives the compression unit via the rotating shaft;
    A rotary compressor comprising:
    In the vicinity of the rivet hole of the discharge valve presser constituting the discharge valve portion, a lightening portion is provided,
    2. The rotary compressor according to claim 1, wherein the lightening portion includes semicircular notches provided on both side portions of the discharge valve presser facing the rivet hole.
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