JP2009167955A - Hermetic compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic compressor reduced in noise which can restrain the rotation of a cover with respect to a step at an end of an opening, and is highly reliable. <P>SOLUTION: In the hermetic compressor reduced in noise, a rotation locking section 165 is arranged between the cover 153 and a delivery chamber 125. When pushing and fixing the cover 153 on a step of a chamber while fastening a bolt 157, the rotation locking section 165 restrains the rotation of the cover 153 even if the cover 153 begins to rotate with respect to the step. The highly-reliable hermetic compressor hardly causes the poor compression and breakage of a delivery communication tube 163. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hermetic compressor, and more particularly, to a rotation stopper provided between an opening end of a discharge chamber and a cover.

  Conventionally, as a method for fixing the discharge chamber and the cover of the hermetic compressor, a method in which the discharge chamber and the cover are fixed with bolts is generally used (see, for example, Patent Document 1).

  Hereinafter, the conventional hermetic compressor will be described with reference to the drawings.

  12 is a side sectional view of a conventional hermetic compressor described in Patent Document 1, FIG. 13 is a plan sectional view of the conventional hermetic compressor described in Patent Document 1, and FIG. It is a principal part expanded sectional view in A line.

  12, 13, and 14, the sealed container 1 includes a discharge pipe 3 and a suction pipe 5 connected to a cooling system (not shown), and stores oil 7 at the bottom, and rotates with the stator 9. The electric element 13 including the child 11 and the compression element 15 driven by the electric element 13 are accommodated, and the inside is filled with the refrigerant 17.

  Next, the main configuration of the compression element 15 will be described.

  The cylinder block 19 includes a substantially cylindrical compression chamber 21, a bearing portion 23, and a discharge chamber 25. The valve plate 27 includes a discharge valve 29 and closes the compression chamber 21.

  The head 31 covers the valve plate 27 and forms a first discharge space 33.

  The suction muffler 35 has one end opened into the sealed container 1 and the other end communicated with the compression chamber 21.

  The crankshaft 37 has a main shaft portion 39 and an eccentric portion 41, and is supported by the bearing portion 23 of the cylinder block 19 and press-fitted and fixed to the rotor 11.

  The piston 43 is inserted into the compression chamber 21 so as to be slidable back and forth, and is connected to the eccentric part 41 by a connecting rod 45.

  Next, the main configuration of the discharge chamber 25 will be described.

  The chamber portion 47 is integrally formed with the cylinder block 19, and a step portion 51 is provided at an opening end portion 49 protruding from the cylinder block 19. The cover 53 is fitted to the stepped portion 51 of the opening end portion 49 via a seal member 55, and is pressed and fixed to the opening end portion 49 by a bolt 57, and the opening end portion 49 is sealed and closed, thereby closing the muffler chamber 59. Forming.

  The muffler chamber 59 communicates with the first discharge space 33 through the pass hole 61a, the two muffler chambers 59 communicate with each other through the pass hole 61b, and communicate with the discharge pipe 3 through the discharge communication pipe 63. The communication pipe 63 is fixed to the cover 53 by welding.

  The seal member 55 is generally made of a paper gasket, a glass, asbestos, or other fiber coated with nitrile rubber.

  The operation and action of the hermetic compressor configured as described above will be described below.

  When electricity is supplied to the electric element 13, the rotor 11 rotates and the crankshaft 37 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 41 is transmitted to the piston 43 via the connecting rod 45, so that the piston 43 reciprocates in the compression chamber 21.

  As the piston 43 reciprocates, the refrigerant 17 in the sealed container 1 is sucked into the compression chamber 21 from the suction muffler 35, and the low-pressure refrigerant 17 is sealed from the cooling system (not shown) through the suction pipe 5. It flows into the container 1.

  The refrigerant 17 sucked into the compression chamber 21 is compressed by the reciprocating motion of the piston 43 and discharged from the discharge valve 29 of the valve plate 27 to the first discharge space 33. The high-pressure gas discharged into the first discharge space 33 passes through the pass holes 61a and 61b, and is once opened to the muffler chamber 59 of the discharge chamber 25, and then passes through the discharge communication pipe 63 and is cooled from the discharge pipe 3 to the cooling system. (Not shown).

At this time, the refrigerant 17 is opened to the muffler chamber 59 and is then throttled by the discharge communication pipe 63, whereby the discharge pulsation due to repeated compression is attenuated and the noise of the cooling system (not shown) can be kept low.
JP 2006-152810 A

  However, in the above-described conventional configuration, when the cover 53 is pressed and fixed to the stepped portion 51 of the chamber portion 47 while the bolt 57 is tightened, the cover 53 rotates, the seal member 55 is lost, and the refrigerant 17 flows from the muffler chamber 59. There were problems such as leakage and compression failure.

  Further, when the cover 53 rotates, the discharge communication pipe 63 is positioned between the cover 53 and the discharge pipe 3, so that the position of the discharge communication pipe 63 in the closed container 1 is shifted, and the closed container 1 and the compression element 15, the discharge communication pipe 63 comes into contact with the noise, and noise is generated, or excessive stress acts on the discharge communication pipe 63 to cause breakage.

  The present invention solves the above-described conventional problems, and can suppress the rotation of the cover when tightening and fixing the cover with a bolt, and has high reliability that is difficult to cause compression failure and breakage of the discharge communication pipe. An object of the present invention is to provide a hermetic compressor with low noise.

  In order to solve the above-described conventional problems, the hermetic compressor of the present invention is provided with a rotation stopper between the cover and the discharge chamber so that the cover and the discharge chamber do not rotate relatively. When the cover is pressed and fixed to the stepped portion of the chamber portion while tightening the bolt, even if the cover is about to rotate with respect to the stepped portion, the rotation stopping portion has an effect of suppressing the rotation of the cover.

  In the hermetic compressor of the present invention, since the rotation stopper is provided between the cover and the discharge chamber, reliability can be improved by preventing compression failure and breakage of the discharge communication pipe. Further, noise can be reduced by avoiding contact between the closed container or the compression element and the discharge communication pipe.

  According to a first aspect of the present invention, lubricating oil is stored in an airtight container, an electric element having a stator and a rotor, and a compression element driven by the electric element are accommodated, and the compression element is compressed. A cylinder block that forms a chamber, a piston that reciprocates in the compression chamber, a valve plate that seals an end surface of the cylinder block and includes a discharge valve device on the non-compression chamber side, and a head that houses the discharge valve device A discharge chamber from which the refrigerant compressed in the compression chamber is discharged, and a discharge pipe that leads one end of the refrigerant into the discharge chamber and guides the refrigerant out of the hermetic container, and an open end of the discharge chamber A cover that is pressed and fixed by a fastening means that closes the portion, and the cover and the discharge chamber do not rotate relatively when the cover is pressed and fixed. The rotation stopper is provided between the cover and the opening end of the discharge chamber. When the cover is pressed and fixed to the stepped portion of the opening end while tightening the bolt, the cover rotates with respect to the stepped portion. Even when trying to do so, the rotation stop portion suppresses the rotation of the cover, so that it is possible to provide a hermetic compressor with high reliability that is unlikely to cause compression failure or breakage of the discharge communication pipe and low noise.

  The invention according to claim 2 is the invention according to claim 1, wherein the rotation stopping portion is formed by engaging a convex portion and a concave portion formed at the opening end of the cover and the discharge chamber, respectively, and has a simple structure. Thus, the rotation of the cover can be surely prevented, and in addition to the effect of the invention according to claim 1, the productivity can be further increased and the effect of preventing the rotation of the cover can be ensured.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the discharge chamber is formed integrally with the head, and the processing of the discharge chamber and the number of parts can be reduced and the discharge chamber can be reduced. Since the position of the cover can be determined and fixed more accurately, in addition to the effect of the invention according to claim 1 or 2, the productivity is higher and the reliability is high that the compression failure and the discharge communication pipe are not easily broken. And low noise can be realized.

  The invention according to claim 4 is the invention according to claim 3, wherein the head is made of an aluminum material, and the aluminum material is soft, so that the aluminum can be obtained by simply pressing and fixing the cover to the head while tightening the bolt. In addition to the effect of the invention according to claim 3, the material can be deformed along the contact surface of the cover and the sealing performance of the contact surface can be sufficiently secured even without the seal member. Productivity is high and cost reduction can be realized.

  The invention according to claim 5 is the invention according to claim 1 or 2, wherein the discharge chamber is formed integrally with the cylinder block, so that the processing of the discharge chamber and the number of parts can be reduced. In addition to the effects of the invention according to claim 1 or 2, the position of the cover with respect to can be more accurately determined and fixed, so that the productivity is higher and the compression is difficult and the discharge communication pipe is not easily broken. Reliable and low noise can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side sectional view of a hermetic compressor according to Embodiment 1 of the present invention, FIG. 2 is a plan sectional view of the hermetic compressor according to the same embodiment, and FIG. 4 and 4 are enlarged cross-sectional views of main parts taken along the line BB in FIG.

  1, 2, 3, and 4, the sealed container 101 includes a discharge pipe 103 and a suction pipe 105 that are connected to a cooling system (not shown), respectively, and oil 107 is stored in the bottom portion of the sealed container 101. The electric element 113 composed of 109 and the rotor 111 and the compression element 115 driven by the electric element 113 are accommodated, and the inside is filled with the refrigerant 117.

  Next, the main configuration of the compression element 115 will be described.

  The cylinder block 119 includes a substantially cylindrical compression chamber 121, a bearing portion 123, and a discharge chamber 125. The valve plate 127 includes a discharge valve 129 and closes the compression chamber 121.

  The head 131 covers the valve plate 127 and forms a first discharge space 133.

  One end of the suction muffler 135 opens into the sealed container 101 and the other end communicates with the compression chamber 121.

  The crankshaft 137 has a main shaft portion 139 and an eccentric portion 141, and is pivotally supported by the bearing portion 123 of the cylinder block 119 and is press-fitted and fixed to the rotor 111.

  The piston 143 is inserted into the compression chamber 121 so as to be slidable back and forth, and is connected to the eccentric portion 141 by a connecting rod 145.

  Next, a main configuration of the discharge chamber 125 will be described.

  The chamber part 147 is integrally formed with the cylinder block 119, and a step part 151 is provided at an opening end part 149 protruding from the cylinder block 119. The cover 153 is fitted to the stepped portion 151 of the opening end portion 149 via a seal member 155, is pressed and fixed to the opening end portion 149 by a bolt 157, and seals and closes the opening end portion 149, thereby closing the muffler chamber 159. Forming.

  Further, a rotation stopper 165 is provided between the cover 153 and the step 151 so that the cover 153 and the opening end 149 of the discharge chamber 125 do not rotate relative to each other. The rotation stopper 165 has a convex part 165 a formed on a part of the outer periphery of the cover 153, and a concave part 165 b with which the convex part 165 a engages is formed in the step part 151.

  The muffler chamber 159 communicates with the first discharge space 133 through the pass hole 161a, the two muffler chambers 159 communicate with each other through the pass hole 161b, and communicate with the discharge pipe 103 through the discharge communication pipe 163. The communication pipe 163 is fixed to the cover 153 by welding.

  Further, as the seal member 155, a paper gasket, a gasket in which nitrile rubber is coated on glass, asbestos or other fibers is generally used.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When electricity is supplied to the electric element 113, the rotor 111 rotates and the crankshaft 137 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 141 is transmitted to the piston 143 via the connecting rod 145, so that the piston 143 reciprocates in the compression chamber 121.

  As the piston 143 reciprocates, the refrigerant 117 in the sealed container 101 is sucked into the compression chamber 121 from the suction muffler 135, and the low-pressure refrigerant 117 is sealed from the cooling system (not shown) through the suction pipe 105. It flows into the container 101.

  The refrigerant 117 sucked into the compression chamber 121 is compressed by the reciprocating motion of the piston 143 and is discharged from the discharge valve 129 of the valve plate 127 to the first discharge space 133. The high pressure gas discharged into the first discharge space 133 passes through the pass holes 161a and 161b, and is once opened to the muffler chamber 159 of the discharge chamber 125, and then passes through the discharge communication pipe 163 and is cooled from the discharge pipe 103 to the cooling system. (Not shown).

  Here, when the cover 153 is pressed and fixed to the stepped portion 151 of the opening end 149 while tightening the bolt 157, for example, the contact resistance between the cover 153 and the bolt 157 is larger than the friction resistance between the cover 153 and the seal member 155. Thus, even when the cover 153 attempts to rotate with respect to the stepped portion 151, the rotation preventing portion 165 suppresses the rotation of the cover 153, so that the seal member 155 is lost and the refrigerant 117 is prevented from leaking from the muffler chamber 159. In addition, it is possible to prevent the discharge communication pipe 163 from being displaced and prevent the discharge communication pipe 163 from coming into contact with the sealed container 101 or the compression element 115. Therefore, it is difficult to cause compression failure or breakage of the discharge communication pipe 163. A hermetic compressor having reliability and low noise can be provided.

  On the other hand, the anti-rotation portion 165 between the cover 153 and the step portion 151 is such that the convex portion 165a formed on the cover 153 and the concave portion 165b formed on the step portion 151 are engaged, and the cover 153 has a simple structure. Can be reliably prevented, the productivity is high, and the rotation stopping effect of the cover 153 can be ensured.

  In the present embodiment, the example of engaging the convex portion 165a formed on the cover 153 and the concave portion 165b formed on the stepped portion 151 as the rotation preventing portion 165 has been described. Any structure having the above can be implemented in the same manner.

(Embodiment 2)
5 is a side cross-sectional view of a hermetic compressor according to Embodiment 2 of the present invention, FIG. 6 is a plan cross-sectional view of the hermetic compressor of the same embodiment, and FIG. 7 is an enlarged cross-sectional view of the main part of FIG. FIG.

  5, 6, and 7, each of the sealed containers 201 includes a discharge pipe 203 and a suction pipe 205 that are connected to a cooling system (not shown), stores oil 207 at the bottom, and rotates with the stator 209. The electric element 213 including the child 211 and the compression element 215 driven by the electric element 213 are accommodated, and the inside is filled with the refrigerant 217.

  Next, the main configuration of the compression element 215 will be described.

  The cylinder block 219 includes a substantially cylindrical compression chamber 221 and a bearing portion 223. The valve plate 227 includes a discharge valve 229 and closes the compression chamber 221.

  The head 231 covers the valve plate 227 and forms a discharge space 233.

  The cover 253 is fitted to the head 231 via a seal member (not shown) and is pressed and fixed to the head 231 by a bolt 257 to seal and close the discharge space 233.

  Further, a rotation stopper 265 is provided between the cover 253 and the head 231 so that the cover 253 and the head 231 do not rotate relatively. The rotation stopper 265 has a convex portion 265 a formed on a part of the outer periphery of the cover 253, and a concave portion 265 b that engages with the convex portion 265 a is formed in the head 231.

  The cover 253 communicates with the discharge pipe 203 via the discharge communication pipe 263, and the discharge communication pipe 263 is fixed to the cover 253 by welding.

  In general, a sealing member (not shown) is a paper gasket or a gasket in which nitrile rubber is coated on glass, asbestos or other fibers.

  One end of the suction muffler 235 opens into the sealed container 201, and the other end communicates with the compression chamber 221.

  Further, the crankshaft 237 has a main shaft portion 239 and an eccentric portion 241, and is pivotally supported by the bearing portion 223 of the cylinder block 219 and is press-fitted and fixed to the rotor 211.

  The piston 243 is inserted into the compression chamber 221 so as to be reciprocally slidable, and is connected to the eccentric portion 241 by a connecting rod 245.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When electricity is supplied to the electric element 213, the rotor 211 rotates and the crankshaft 237 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 241 is transmitted to the piston 243 via the connecting rod 245, so that the piston 243 reciprocates in the compression chamber 221.

  As the piston 243 reciprocates, the refrigerant 217 in the sealed container 201 is sucked into the compression chamber 221 from the suction muffler 235 and the low-pressure refrigerant 217 is sealed from the cooling system (not shown) through the suction pipe 205. It flows into the container 201.

  The refrigerant 217 sucked into the compression chamber 221 is compressed by the reciprocating motion of the piston 243 and discharged from the discharge valve 229 of the valve plate 227 to the discharge space 233. The high-pressure gas discharged into the discharge space 233 is discharged from the discharge pipe 203 to the cooling system (not shown) through the discharge communication pipe 263.

  Here, when the cover 253 is pressed and fixed to the head 231 while tightening the bolt 257, for example, the contact resistance between the cover 253 and the bolt 257 is larger than the friction resistance between the cover 253 and the seal member (not shown), Even when the cover 253 tries to rotate with respect to the head 231, the rotation stopper 265 suppresses the rotation of the cover 253, so that the seal member is lost and the refrigerant 217 can be prevented from leaking from the discharge space 233. Since the position of the discharge communication pipe 263 is displaced and the discharge communication pipe 263 can be prevented from coming into contact with the sealed container 201 or the compression element 215, it has high reliability that is unlikely to cause a compression failure or breakage of the discharge communication pipe 263. In addition, a hermetic compressor with low noise can be provided.

  On the other hand, the anti-rotation portion 265 between the cover 253 and the head 231 is such that the convex portion 265a formed on the cover 253 and the concave portion 265b formed on the head 231 are engaged, and the rotation of the cover 253 is simple. Can be reliably prevented, the productivity is high, and the effect of preventing the rotation of the cover 253 can be ensured.

  Furthermore, since the portion corresponding to the conventional discharge chamber is formed in the discharge space 233 of the head 231, the processing of the cylinder block 219 and the number of parts can be reduced, and the position of the cover 253 with respect to the head 231 is more accurately determined. Therefore, it is possible to provide a hermetic compressor with higher productivity.

  On the other hand, since the aluminum material is soft by forming the head 231 with an aluminum material, the aluminum material is deformed along the contact surface of the cover 253 simply by pressing and fixing the cover 253 to the head 231 while tightening the bolts 257. Thus, even if there is no seal member, the sealing performance of the contact surface can be sufficiently ensured, so that the productivity is higher and the cost can be reduced.

  In the present embodiment, as an example of the rotation stop portion 265, a convex portion 265a is formed on a part of the outer periphery of the cover 253, and a concave portion 265b with which the convex portion 265a is engaged is formed on the head 231. However, a structure having a function of stopping rotation can be similarly implemented.

(Embodiment 3)
8 is a side cross-sectional view of a hermetic compressor according to Embodiment 3 of the present invention, FIG. 9 is a plan cross-sectional view of the hermetic compressor of the same embodiment, and FIG. 10 is an enlarged cross-sectional view of the main part of FIG. 11 and 11 are enlarged cross-sectional views of main parts taken along line CC in FIG.

  8, 9, 10, and 11, each of the sealed containers 301 includes a discharge pipe 303 and a suction pipe 305 that are connected to a cooling system (not shown), and stores oil 307 at the bottom to fix the stator. An electric element 313 composed of 309 and a rotor 311 and a compression element 315 driven by the electric element 313 are accommodated, and the inside is filled with a refrigerant 317.

  Next, the main configuration of the compression element 315 will be described.

  The cylinder block 319 includes a substantially cylindrical compression chamber 321, a bearing portion 323, and a discharge chamber 325. The valve plate 327 includes a discharge valve and closes the compression chamber 321.

  The head 331 covers the valve plate 327 and forms a first discharge space 333.

  The suction muffler 335 has one end opened into the sealed container 301 and the other end communicated with the compression chamber 321.

  The crankshaft 337 has a main shaft portion 339 and an eccentric portion 341, and is supported by a bearing portion 323 of the cylinder block 319 and press-fitted and fixed to the rotor 311.

  The piston 343 is inserted into the compression chamber 321 so as to be slidable back and forth, and is connected to the eccentric portion 341 by a connecting rod 345.

  Next, a main configuration of the discharge chamber 325 will be described.

  The chamber portion 347 is integrally formed with the cylinder block 319, and a step portion 351 is provided at an open end 349 protruding from the cylinder block 319. The cover 353 is fitted to the stepped portion 351 of the opening end portion 349 via a seal member 355, pressed and fixed to the opening end portion 349 by a bolt 357, and the opening end portion 349 is sealed and closed, thereby closing the muffler chamber 359. Forming.

  In addition, a rotation stopper 365 is provided between the cover 353 and the step 351 so that the cover 353 and the opening end 349 of the discharge chamber 325 do not rotate relative to each other. The rotation stop portion 365 has a convex portion 365 a formed on a part of the outer periphery of the cover 353, and a concave portion 365 b with which the convex portion 365 a is engaged is formed in the step portion 351.

  The muffler chamber 359 communicates with the first discharge space 333 through the pass hole 361 and communicates with the discharge pipe 303 via the discharge communication pipe 363, and the discharge communication pipe 363 is fixed to the cover 353 by welding.

  Further, as the seal member 355, a paper gasket or a gasket obtained by coating nitrile rubber on glass, asbestos or other fibers is generally used.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When electricity is supplied to the electric element 313, the rotor 311 rotates and the crankshaft 337 is driven to rotate. At this time, the eccentric rotational motion of the eccentric portion 341 is transmitted to the piston 343 via the connecting rod 345, so that the piston 343 reciprocates in the compression chamber 321.

  As the piston 343 reciprocates, the refrigerant 317 in the sealed container 301 is sucked into the compression chamber 321 from the suction muffler 335, and the low-pressure refrigerant 317 is sealed from the cooling system (not shown) through the suction pipe 305. It flows into the container 301.

  The refrigerant 317 sucked into the compression chamber 321 is compressed by the reciprocating motion of the piston 343 and discharged from the discharge valve of the valve plate 327 to the first discharge space 333. The high-pressure gas discharged into the first discharge space 333 passes through the pass hole 361, is once opened to the muffler chamber 359 of the discharge chamber 325, and then passes through the discharge communication pipe 363 and is cooled from the discharge pipe 303 to the cooling system (see FIG. (Not shown).

  Here, when the cover 353 is pressed and fixed to the stepped portion 351 of the opening end 349 while tightening the bolt 357, for example, the contact resistance between the cover 353 and the bolt 357 is larger than the frictional resistance between the cover 353 and the seal member 355. Thus, even when the cover 353 attempts to rotate with respect to the stepped portion 351, the rotation preventing portion 365 suppresses the rotation of the cover 353, so that the seal member 355 is lost and the refrigerant 317 is prevented from leaking from the muffler chamber 359. In addition, it is possible to prevent the discharge communication pipe 363 from being displaced and preventing the discharge communication pipe 363 from coming into contact with the sealed container 301 or the compression element 315. Therefore, it is difficult to cause a compression failure or breakage of the discharge communication pipe 363. A hermetic compressor having reliability and low noise can be provided.

  On the other hand, the rotation preventing portion 365 between the cover 353 and the step portion 351 is such that the convex portion 365a formed on the cover 353 and the concave portion 365b formed on the step portion 351 engage with each other, and the cover 353 has a simple structure. Can be reliably prevented, the productivity is high, and the effect of preventing the rotation of the cover 353 can be ensured.

  Further, by providing the rotation stopper 365 with the discharge communication pipe 363, for example, in the opposite direction, even if the cover 353 is formed thin, the rotation stopper 365 and the discharge communication pipe 363 do not interfere with each other. The cover 353 can be made smaller with a lower overall height.

  Further, since the discharge chamber 325 is formed integrally with the cylinder block 319, the processing of the discharge chamber 325 and the number of parts can be reduced, and the position of the cover 353 with respect to the opening end 349 is more accurately determined and fixed. Therefore, a hermetic compressor with higher productivity can be provided.

  In this embodiment, in the example in which the protrusion 365a is formed on a part of the outer periphery of the cover 353 as the rotation stopper 365, and the recess 365b with which the protrusion 365a is engaged is formed in the step 351. As described above, the structure having the function of stopping the rotation can be similarly implemented.

  As described above, since the hermetic compressor according to the present invention can provide a highly reliable hermetic compressor, a refrigerator such as a household refrigerator, a dehumidifier, a showcase, and a vending machine can be used. It can be applied to any application used.

Side surface sectional drawing of the hermetic compressor in Embodiment 1 of this invention Plan sectional view of the hermetic compressor of the embodiment 2 is an enlarged cross-sectional view of the main part of FIG. The principal part expanded sectional view in the BB line of FIG. Side surface sectional drawing of the hermetic compressor in Embodiment 2 of this invention Plan sectional view of the hermetic compressor of the embodiment The principal part expanded sectional view of FIG. Side surface sectional drawing of the hermetic compressor in Embodiment 3 of this invention Plan sectional view of the hermetic compressor of the embodiment 9 is an enlarged cross-sectional view of the main part of FIG. The principal part expanded sectional view in the CC line of FIG. Side sectional view of a conventional hermetic compressor Plan sectional view of a conventional hermetic compressor The principal part expanded sectional view in the AA line of FIG.

Explanation of symbols

101, 201, 301 Sealed container 103, 203, 303 Discharge pipe 107, 207, 307 Oil 109, 209, 309 Stator 111, 211, 311 Rotor 113, 213, 313 Electric element 115, 215, 315 Compression element 117, 217,317 Refrigerant 119,219,319 Cylinder block 121,221,321 Compression chamber 125,325 Discharge chamber 127,227,327 Valve plate 129,229 Discharge valve 131,231,331 Head 143,243,343 Piston 149,349 Open end 153,253,353 Cover 165,265,365 Anti-rotation part 165a, 265a, 365a Convex part 165b, 265b, 365b Concave part

Claims (5)

  The oil is stored in a sealed container, and an electric element having a stator and a rotor and a compression element driven by the electric element are accommodated, and the compression element has a cylinder block forming a compression chamber, and the compression A piston that reciprocates in the chamber, a valve plate that seals the end face of the cylinder block and includes a discharge valve on the side opposite to the compression chamber, a head that houses the discharge valve, and a refrigerant compressed in the compression chamber A discharge chamber, one end communicating with the inside of the discharge chamber, a discharge pipe for guiding the refrigerant to the outside of the hermetic container, and a cover fixed by pressing means for closing the opening end of the discharge chamber So that the cover and the opening end of the discharge chamber do not rotate relative to each other when the cover is pressed and fixed. Cover the hermetic compressor provided with a rotation stop portion between the open end portion of the discharge chamber.   2. The hermetic compressor according to claim 1, wherein the rotation stopper is configured by engaging a convex portion and a concave portion respectively formed at the opening end portion of the cover and the discharge chamber.   The hermetic compressor according to claim 1, wherein the discharge chamber is formed integrally with the head.   The hermetic compressor according to claim 3, wherein the head is made of an aluminum material.   The hermetic compressor according to claim 1, wherein the discharge chamber is formed integrally with the cylinder block.

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