JP2012013052A - Hermetic compressor and refrigerating cycle device - Google Patents

Abstract

An object of the present invention is to improve gas refrigerant discharge performance from a cylinder chamber into a discharge chamber formed in a partition plate, improve gas refrigerant discharge performance from the discharge chamber, and improve the performance of a hermetic compressor. .
A closed type is provided with a compression mechanism section 9 and an electric motor section 10 housed in a sealed container 2a, and a discharge passage 12 through which gas refrigerant compressed by the compression mechanism section 9 is discharged to the outside of the sealed container 2a. In the compressor 2, the compression mechanism section 9 includes a partition plate 16, a pair of cylinders 17 and 18 having cylinder chambers 21 and 25 provided on both upper and lower sides of the partition plate 16, and a discharge formed in the partition plate 16. The chamber 19 includes discharge valves 20 a and 20 b attached to the discharge chamber 19 and opening and closing discharge holes through which the gas refrigerant compressed in the cylinder chambers 21 and 25 is discharged into the discharge chamber 19. A discharge port 31 that connects the discharge chamber 19 and the discharge passage 12 is formed on the lower side of the discharge chamber 19.
[Selection] Figure 2

Description

  Embodiments described herein relate generally to a hermetic compressor and a refrigeration cycle apparatus.

  A compression mechanism that compresses the gas refrigerant and an electric motor that drives the compression mechanism are housed in a sealed container, and the compression mechanism includes a partition plate and a pair of cylinders positioned above and below the partition plate. As a type compressor, for example, one described in Patent Document 1 below is known. According to the hermetic compressor described in Patent Document 1, the discharge chamber is formed in the partition plate, and the gas refrigerant compressed in the cylinder chamber of each cylinder is discharged into the discharge chamber. The gas refrigerant discharged from each cylinder into the discharge chamber is discharged from the discharge port formed in the partition plate to the outside of the sealed container and supplied to the heat exchanger.

  The partition plate is provided with a discharge hole through which the gas refrigerant compressed in the cylinder chamber is discharged into the discharge chamber, and a discharge valve for preventing the gas refrigerant in the discharge chamber from flowing back into the cylinder chamber is provided in the discharge chamber. ing.

  Note that the discharge port for the gas refrigerant discharged from the discharge chamber is formed on the upper side of the partition plate.

Japanese Patent Laid-Open No. 10-213087

  The gas refrigerant compressed in the cylinder chamber contains lubricating oil used for lubricating the sliding portion of the cylinder, and this lubricating oil is discharged into the discharge chamber together with the compressed gas refrigerant.

  The lubricating oil discharged into the discharge chamber is not easily discharged outside the discharge chamber because the discharge port is formed on the upper side of the partition plate, and gradually accumulates in the discharge chamber.

  When the lubricating oil accumulates in the discharge chamber, the accumulated lubricating oil hinders the opening / closing operation of the discharge valve, or the flow of gas refrigerant in the discharge chamber is hindered, thereby reducing the performance of the hermetic compressor.

  An object of an embodiment of the present invention is to improve the gas refrigerant discharge performance from the cylinder chamber into the discharge chamber formed in the partition plate, and to improve the gas refrigerant discharge performance from the discharge chamber, thereby It is to improve the performance of the machine.

  According to the hermetic compressor of the embodiment, the compression mechanism unit and the motor unit, which are connected to each other through the rotary shaft having the vertical axis, are accommodated in the hermetic container, and the pressure in the inner space of the hermetic container is In a hermetic compressor having a discharge passage that is set to be the same as the suction pressure to the compression mechanism and discharges the gas refrigerant compressed by the compression mechanism to the outside of the hermetic container, the compression mechanism includes a partition A pair of cylinders having cylinder chambers provided on both upper and lower sides of the partition plate, a discharge chamber formed in the partition plate, and a gas refrigerant attached to the discharge chamber and compressed in the cylinder chamber Includes a discharge valve that opens and closes a discharge hole that discharges into the discharge chamber, and a discharge port that connects the discharge chamber and the discharge passage is formed on a lower side of the discharge chamber.

It is a schematic diagram which shows the refrigerating cycle of the air conditioner as a refrigerating cycle apparatus of the 1st Embodiment of this invention. It is a vertical front view which shows the internal structure of the hermetic compressor of the 1st Embodiment of this invention. It is a top view which shows the upper part side partition plate and lower part side partition plate of the 1st Embodiment of this invention. It is a top view which shows the lower part side partition plate of the 2nd Embodiment of this invention. It is a top view which shows the lower part side partition plate of the 3rd Embodiment of this invention. It is a vertical front view which shows the compression mechanism part of the 4th Embodiment of this invention. It is a vertical front view which shows the compression mechanism part of the 5th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. As shown in the refrigeration cycle diagram of FIG. 1, an air conditioner 1 that is a refrigeration cycle apparatus functions as a hermetic compressor 2, an oil separator 3, a four-way valve 4, and a condenser during cooling operation. An outdoor heat exchanger 5 that is a heat source side heat exchanger that functions as an evaporator during heating operation, an expansion device 6, and a use-side heat exchanger that functions as an evaporator during cooling operation and also functions as a condenser during heating operation. A certain indoor heat exchanger 7 and an accumulator 8 are connected in a cycle.

  In this air conditioner 1, during the cooling operation, high-pressure gas refrigerant is discharged from the hermetic compressor 2 and flows as indicated by solid arrows, and outdoor heat exchange is performed via the oil separator 3 and the four-way valve 4. It flows into the condenser (condenser) 5 and is condensed by exchanging heat with the outside air in the outdoor heat exchanger 5. The condensed refrigerant flows into the indoor heat exchanger (evaporator) 7 via the expansion device 6, evaporates by exchanging heat with the indoor air in the indoor heat exchanger 7, and cools the indoor air. The evaporated gas refrigerant is sucked into the hermetic compressor 2 via the four-way valve 4 and the accumulator 8.

  On the other hand, at the time of heating operation, high-pressure gas refrigerant is discharged from the hermetic compressor 2 and flows as indicated by the broken arrow, and passes through the oil separator 3 and the four-way valve 4 to heat the indoor heat exchanger (condenser). 7 flows into the indoor heat exchanger 7 and is condensed by exchanging heat with the indoor air in the indoor heat exchanger 7 to heat the indoor air. The condensed refrigerant flows into the outdoor heat exchanger (evaporator) 5 through the expansion device 6 and evaporates by exchanging heat with outdoor air in the outdoor heat exchanger 5. The evaporated gas refrigerant is sucked into the hermetic compressor 2 via the four-way valve 4 and the accumulator 8.

  As described above, the cooling operation or the heating operation of the air conditioner 1 is continued by continuing the circulation of the refrigerant.

  As shown in FIG. 2, the hermetic compressor 2 includes a hermetic container 2a, and the compression mechanism unit 9 and the electric motor unit 10 are accommodated in the hermetic container 2a. The compression mechanism unit 9 and the electric motor unit 10 are arranged such that the compression mechanism unit 9 is located on the lower side and the electric motor unit 10 is located on the upper side. The compression mechanism unit 9 and the electric motor unit 10 are arranged in a vertical axis. The compression mechanism unit 9 is driven by the electric motor unit 10 through a rotating shaft 11 having a center.

  The oil separator 3 is provided in the middle of a refrigerant discharge pipe 12 that is a discharge passage for discharging the gas refrigerant compressed by the compression mechanism unit 9 to the outside of the sealed container 2a, and separates the lubricating oil contained in the gas refrigerant. . The lubricating oil separated by the oil separator 3 is supplied to the sliding portion of the compression mechanism portion 9 via the oil return pipe 13 constituting the oil supply passage.

  The electric motor unit 10 includes a rotor 10a and a stator 10b. The stator 10b is fixed to the inner peripheral portion of the hermetic container 2a, and the rotor 10a is rotatably disposed inside the stator 10b. A rotating shaft 11 is fixed to the center of the rotor 10a, and the rotating shaft 11 is rotatably supported by a main bearing 14 and a sub bearing 15. The rotating shaft 11 is formed with a pair of eccentric portions 11a and 11b.

  The compression mechanism unit 9 is a part that compresses a low-pressure gas refrigerant into a high-pressure / high-temperature gas refrigerant, and includes a partition plate 16 and a pair of cylinders 17 and 18 positioned on both upper and lower sides across the partition plate 16; A discharge chamber 19 formed in the partition plate 16 and discharge valves 20a and 20b attached to the discharge chamber 19 and opening and closing discharge holes 29a and 29b (see FIG. 3) are provided.

  The cylinder 17 has a cylinder chamber 21 whose upper end is closed by the main bearing 14 and whose lower end is closed by the partition plate 16. An eccentric portion 11a of the rotating shaft 11 is disposed in the cylinder chamber 21, and a roller 22a is fitted into the eccentric portion 11a. The cylinder 17 is slidably held and is urged by an urging body such as a spring so that the tip end is brought into contact with the outer peripheral surface of the roller 22a. A partitioning blade (not shown) is provided. The cylinder chamber 21 is connected to a refrigerant suction pipe 24 a that sucks the refrigerant circulating in the air conditioner 1 into the cylinder chamber 21. The refrigerant suction pipe 24a communicates with the sealed container 2a, and the pressure in the space inside the sealed container 2a and the suction pressure to the compression mechanism unit 9 are set to be the same.

  The cylinder 18 has a cylinder chamber 25 whose upper end is closed by the partition plate 16 and whose lower end is closed by the auxiliary bearing 15. An eccentric portion 11b of the rotating shaft 11 is disposed in the cylinder chamber 25, and a roller 22b is fitted to the eccentric portion 11b. The cylinder 18 is slidably held and is urged by an urging body such as a spring so that the tip end is brought into contact with the outer peripheral surface of the roller 22b. A partitioning blade (not shown) is provided. The cylinder chamber 25 is connected to a refrigerant suction pipe 24 b that sucks the refrigerant circulating in the air conditioner 1 into the cylinder chamber 25. Similarly to the refrigerant suction pipe 24a, the refrigerant suction pipe 24b communicates with the sealed container 2a.

  The partition plate 16 is formed by joining the upper side partition plate 16a and the lower side partition plate 16b.

  3 shows the upper side partition plate 16a and the lower side partition plate 16b separated from each other, FIG. 3 (a) is a plan view showing the upper side partition plate 16a, and FIG. 3 (b) is the lower side partition plate. It is a top view which shows the board 16b.

  The upper side partition plate 16a is formed with an insertion hole 26a through which the rotary shaft 11 is inserted at the center, and a recess 27a is formed around the insertion hole 26a. The lower side partition plate 16b is formed with an insertion hole 26b through which the rotary shaft 11 is inserted at the center, and a recess 27b is formed around the insertion hole 26b. And the discharge chamber 19 is formed of the opposing recessed parts 27a and 27b by joining the upper side partition plate 16a and the lower side partition plate 16b in the direction which makes the recessed parts 27a and 27b oppose.

  A plurality of fixing bolt holes 28 through which bolts for assembling the compression mechanism section are inserted are formed in the upper side partition plate 16a and the lower side partition plate 16b.

  The upper side partition plate 16 a has a discharge hole 29 a through which the cylinder chamber 21 and the discharge chamber 19 are communicated, and high-pressure gas refrigerant compressed in the cylinder chamber 21 is discharged into the discharge chamber 19. A discharge valve 20 a that opens and closes the discharge hole 29 a is attached to the surface of the recess 27 a that is the upper surface of the discharge chamber 19.

  The lower partition plate 16 b is formed with a discharge hole 29 b through which the cylinder chamber 25 and the discharge chamber 19 are communicated, and high-pressure gas refrigerant compressed in the cylinder chamber 25 is discharged into the discharge chamber 19. A discharge valve 20 b that opens and closes the discharge hole 29 b is attached to the surface of the recess 27 b that is the lower surface portion of the discharge chamber 19. Further, a discharge port 31 is formed in the lower side partition plate 16b, and the discharge chamber 19 and the refrigerant discharge pipe 12 are communicated with each other through the discharge port 31.

  Note that an oil supply passage is configured with the oil return pipe 13 on the joint surface between the upper side partition plate 16a and the lower side partition plate 16b, and the lubricating oil supplied from the oil separator 3 via the oil return pipe 13 is supplied. An oil supply groove 32 for supplying oil to a sliding portion between the inner peripheral surface of the insertion holes 26 a and 26 b and the outer peripheral surface of the rotary shaft 11 is formed.

  In such a configuration, when the air conditioner 1 is operated, the electric motor unit 10 is driven to rotate the rotating shaft 11, and the rollers 22 a and 22 b fitted to the eccentric portions 11 a and 11 b pass through the cylinder chambers 21 and 25. Roll. Then, when the rollers 22a and 22b roll in the cylinder chambers 21 and 25, the low-pressure gas refrigerant is sucked into the cylinder chambers 21 and 25 from the refrigerant suction pipes 24a and 24b and compressed.

  The gas refrigerant compressed in the cylinder chambers 21 and 25 is discharged into the discharge chamber 19 by opening the discharge valves 20a and 20b, and is further discharged from the discharge chamber 19 through the discharge port 31 into the refrigerant discharge pipe 12. Discharged. The gas refrigerant discharged into the refrigerant discharge pipe 12 flows into the outdoor heat exchanger 5 or the indoor heat exchanger 7 via the oil separator 3 and the four-way valve 4.

  The gas refrigerant compressed in the cylinder chambers 21 and 25 includes lubricating oil used for lubrication of the sliding portion in the compression mechanism unit 9, and this lubricating oil is discharged into the discharge chamber 19 together with the gas refrigerant. Is done.

  Here, the discharge port 31 that connects the discharge chamber 19 and the refrigerant discharge pipe 12 is formed on the lower side of the discharge chamber 19. For this reason, the lubricating oil discharged into the discharge chamber 19 together with the gas refrigerant is discharged from the discharge port 31 into the refrigerant discharge pipe 12 together with the gas refrigerant without accumulating in the discharge chamber 19.

  Therefore, the lubricating oil does not accumulate in the discharge chamber 19, and the opening and closing operation of the discharge valves 20 a and 20 b is hindered by the lubricating oil accumulated in the discharge chamber 19, or the flow of the gas refrigerant in the discharge chamber 19 is prevented. The performance of the hermetic compressor 2 can be maintained in a good state without being hindered.

Further, the lubricating oil used in the lubrication of the sliding portion in the compression mechanism 9 and contained in the gas refrigerant is discharged into the refrigerant discharge pipe 12 without collecting in the discharge chamber 19 and separated by the oil separator 3. Then, the oil is supplied to the sliding portion of the compression mechanism portion 9 via the oil return pipe 13. Therefore, the lubricating oil accumulated in the discharge chamber 19 does not cause a shortage of lubricating oil for lubricating the sliding portion of the compression mechanism section 9, and the sliding portion of the compression mechanism section 9 can be lubricated satisfactorily. Can do.
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. Note that in this embodiment and other embodiments described below, the same components as those of the previously described embodiments are denoted by the same reference numerals, and redundant description is omitted.

  The basic structure of the second embodiment is the same as that of the first embodiment. The difference between the second embodiment and the first embodiment is that the second embodiment has a lower side. The guide groove 41 is formed in the partition plate 16b.

  A valve seat digging portion 42 is formed on the bottom surface portion of the recessed portion 27b of the lower side partition plate 16b, which is the lower surface portion of the discharge chamber 19, so as to be located at the attachment position of the discharge valve 20b. The valve seat digging portion 42 is formed so as to be recessed from other portions of the bottom surface portion of the recessed portion 27b. A concave groove that connects the valve seat digging portion 42 and the discharge port 31 is formed as a guide groove 41 on the bottom surface of the recess 27b.

  In such a configuration, the lubricating oil tends to accumulate in the valve seat digging portion 42 located on the lower side in the discharge chamber 19. The lubricating oil accumulated in the valve seat digging portion 42 flows through the guide groove 41 to the discharge port 31 and is discharged from the discharge port 31 into the refrigerant discharge pipe 12.

Therefore, by forming the guide groove 41, it is possible to prevent the occurrence of a situation in which lubricating oil accumulates in the valve seat digging portion 42 and hinders the opening and closing of the discharge valve 20b, and the performance of the hermetic compressor 2 is improved. It can be maintained in a good state.
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. The basic structure of the third embodiment is the same as that of the first embodiment, and the third embodiment is different from the first embodiment in that the lower side partition in the third embodiment. A plurality of dug portions 51 are formed on the plate 16b, and a guide groove 41 is formed as in the second embodiment.

  The width dimension of the discharge chamber 19 from the attachment point of the discharge valve 20b to the discharge port 31 in the discharge chamber 19 is not constant, but is narrow in the region where the fixing bolt hole 28 is formed. A digging portion 51 is formed in a bottom surface portion of the recess 27b of the lower side partition plate 16b, which is a lower surface portion of the discharge chamber 19, at a location where the width dimension in the discharge chamber 19 is narrow. The digging portion 51 is formed so as to be recessed from other portions of the bottom surface portion of the recessed portion 27b.

  Further, the guide groove 41 is formed at the bottom surface portion of the recess portion 27 b to connect the valve seat digging portion 42 and the discharge port 31 and to connect the plurality of digging portions 51.

  In such a configuration, the gas refrigerant discharged into the discharge chamber 19 from the discharge hole 29b located at the mounting position of the discharge valve 20b flows in the discharge chamber 19 toward the discharge port 31, but the discharge valve 20b is mounted. The width dimension of the discharge chamber 19 from the position to the discharge port 31 is not constant, and is narrow in the region where the fixing bolt hole 28 is formed. For this reason, if no countermeasure is taken, the passage resistance when the gas refrigerant flows may increase in this narrowed region.

  Therefore, as shown in the present embodiment, by forming the dug portion 51, the passage area from the attachment position of the discharge valve 20b to the discharge port 31 can be made uniform. Thereby, the location where passage resistance becomes large when the gas refrigerant flows in the discharge chamber 19 can be eliminated, and the performance of the hermetic compressor 2 can be maintained in a good state.

  In addition, since the guide groove 41 is formed by connecting these digging portions 51, it is possible to prevent the occurrence of a situation in which lubricating oil is accumulated in the digging portions 51 and the passage area is narrowed.

In the present embodiment, the case where the dug portion 51 is formed in the lower partition plate 16b has been described as an example. However, the surface of the recess portion 27a of the upper partition plate 16a that is the upper surface portion of the discharge chamber 19 is described. It may be formed only on the part, or may be formed on both the upper side partition plate 16a and the lower side partition plate 16b.
(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIG. The basic structure of the fourth embodiment is the same as that of the first embodiment, and the fourth embodiment is different from the first embodiment in that lubrication is accumulated at the bottom of the sealed container 2a. A supply passage 61 for supplying oil to the suction side of the compression mechanism section 9 is provided.

  At the lower end side of the supply passage 61, a suction port 62 is formed which is immersed in the lubricating oil accumulated at the bottom of the sealed container 2a. The supply passage 61 has an upper supply passage 63 and a lower supply passage 64 that are vertically branched at the upper end side thereof. The upper supply passage 63 is connected to the suction side of the cylinder 17, and the lower supply passage 64 is connected to the cylinder 18. Connected to the suction side.

  A lower end portion of the rotating shaft 11 arranged with a vertical axis is supported by a thrust bearing 65. The suction port 62 of the supply passage 61 is provided at a position higher than the thrust bearing 65.

  In such a configuration, during the operation of the air conditioner 1, the gas refrigerant flows through the refrigerant suction pipes 24 a and 24 b and is sucked into the cylinder chambers 21 and 25. Due to the ejector effect associated with the flow of the gas refrigerant, the lubricating oil accumulated at the bottom of the sealed container 2a is sucked up through the supply passage 61, the upper supply passage 63, and the lower supply passage 64. The sucked lubricating oil is sucked into the cylinder chambers 21 and 25 together with the gas refrigerant, and the lubricating oil sucked into the cylinder chambers 21 and 25 is used for lubricating the sliding portion of the compression mechanism section 9.

  Here, since the suction port 62 of the supply passage 61 is provided at a position higher than the thrust bearing 65 that supports the lower end portion of the rotating shaft 11, the thrust bearing 65 is the lubricating oil collected at the bottom in the sealed container 2a. The state immersed in is maintained.

Therefore, the lubricating oil can be reliably supplied to the thrust bearing 65, and seizure of the thrust bearing 65 due to insufficient supply of the lubricating oil can be prevented. Thereby, the performance of the hermetic compressor 2 can be maintained in a good state.
(Fifth embodiment)
A fifth embodiment of the present invention will be described with reference to FIG. The basic structure of the fifth embodiment is the same as that of the fourth embodiment, and the fifth embodiment is different from the fourth embodiment in that it is located on the upper end side of the supply passage 61. The upper and lower supply passages 63a and 64a branched vertically are different in the flow path area. Specifically, the flow passage area of the upper supply passage 63a is formed large, and the flow passage area of the lower supply passage 64a is formed small.

  In such a configuration, during operation of the air conditioner 1, the lubricating oil accumulated at the bottom of the sealed container 2a is sucked up through the supply passage 61, the upper supply passage 63a, and the lower supply passage 64a. . The sucked lubricating oil is sucked into the cylinder chambers 21 and 25 together with the gas refrigerant, and the lubricating oil sucked into the cylinder chambers 21 and 25 is used for lubricating the sliding portion of the compression mechanism section 9.

  Here, when the lubricant accumulated in the bottom of the sealed container 2a is sucked up by the ejector effect, if no measures are taken, the amount of the lubricant sucked into the cylinder chamber 21 located above is lowered. May be less than the amount of lubricating oil sucked into the cylinder chamber 25 located at the position.

  Therefore, as shown in the present embodiment, the amount of the lubricating oil flowing into the upper cylinder chamber 21 and the lower cylinder chamber 25 are increased by making the passage diameter of the upper supply passage 63a larger than the passage diameter of the lower supply passage 64a. It is possible to equalize the amount of lubricating oil flowing into the interior.

  Therefore, seizure on the cylinder 17 side caused by insufficient supply of lubricating oil into the upper cylinder chamber 21 can be prevented, and oil compression by excessive supply of lubricating oil into the lower cylinder chamber 25 can be prevented. Can be prevented. Thereby, the performance of the hermetic compressor 2 can be maintained in a good state.

  According to each embodiment described above, the discharge port 31 that connects the discharge chamber 19 formed in the partition plate 16 and the refrigerant discharge pipe 12 is formed on the lower side of the discharge chamber 19, so that the discharge is performed together with the gas refrigerant. The lubricating oil discharged into the chamber 19 is discharged from the discharge port 31 into the refrigerant discharge pipe 12 together with the gas refrigerant without accumulating in the discharge chamber 19.

  Therefore, the lubricating oil accumulated in the discharge chamber 19 does not hinder the opening / closing operation of the discharge valves 20a and 20b, and the flow of the gas refrigerant in the discharge chamber 19 is not hindered.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

2 ... Sealed compressor, 2a ... Sealed container, 3 ... Oil separator, 5 ... Heat source side heat exchanger (outdoor heat exchanger), 6 ... Expansion device, 7 ... Usage side heat exchanger (indoor heat exchanger) , 9 ... Compression mechanism part, 10 ... Electric motor part, 11 ... Rotating shaft, 12 ... Discharge passage (refrigerant discharge pipe), 16 ... Partition plate, 17, 18 ... Cylinder, 19 ... Discharge chamber, 20a, 20b ... Discharge valve, DESCRIPTION OF SYMBOLS 21 ... Cylinder chamber, 25 ... Cylinder chamber, 29a, 29b ... Discharge hole, 31 ... Discharge port, 41 ... Guide groove, 42 ... Valve seat digging part, 51 ... Digging part, 61 ... Supply passage, 63a ... Upper supply Passage, 64a ... lower supply passage, 65 ... thrust bearing

Claims (6)

A compression mechanism unit and an electric motor unit that are connected to each other via a rotary shaft having a vertical axis in the sealed container are housed, and the pressure in the sealed container space is set to be the same as the suction pressure to the compression mechanism unit. A hermetic compressor including a discharge passage for discharging the gas refrigerant compressed by the compression mechanism section to the outside of the hermetic container;
The compression mechanism is attached to the partition plate, a pair of cylinders provided on both upper and lower sides of the partition plate and having a cylinder chamber, a discharge chamber formed in the partition plate, and the discharge chamber. A discharge valve that opens and closes a discharge hole through which the gas refrigerant compressed in the chamber is discharged into the discharge chamber;
A discharge port that connects the discharge chamber and the discharge passage is formed on the lower side of the discharge chamber.
A hermetic compressor characterized by that.   A valve seat digging portion that is recessed from the other part of the lower surface portion of the discharge chamber is formed at the attachment portion of the discharge valve on the lower surface portion of the discharge chamber, and connects the valve seat digging portion and the discharge port. 2. The hermetic compressor according to claim 1, wherein a concave guide groove is formed in a lower surface portion of the discharge chamber.   At least one of the lower surface portion and the upper surface portion of the discharge chamber where the width dimension of the discharge chamber between the attachment point of the discharge valve and the discharge port becomes narrow is formed a digging portion that is recessed from other portions. The hermetic compressor according to claim 1, wherein the hermetic compressor is provided.   An oil separator for separating the lubricating oil contained in the gas refrigerant is connected to the discharge passage, and the lubricating oil separated by the oil separator is supplied to the sliding portion of the compression mechanism unit, and the inside of the sealed container Characterized in that a supply passage is provided for supplying the lubricating oil to the suction side of the compression mechanism portion, and the suction port of the supply passage is provided at a position higher than the thrust bearing that supports the lower end portion of the rotating shaft. The hermetic compressor according to any one of claims 1 to 3.   The supply passage has an upper supply passage communicated with one of the cylinder chambers located on the upper side and a lower supply passage communicated with the other cylinder chamber located on the lower side, 5. The hermetic compressor according to claim 4, wherein a passage area is formed larger than a passage area of the lower supply passage. A refrigeration cycle apparatus comprising the hermetic compressor according to any one of claims 1 to 5, a heat source side heat exchanger, an expansion device, and a use side heat exchanger.

Images