JP2005240695A - Horizontal hermetic compressor - Google Patents

Abstract

[PROBLEMS] To cool the inside of a sealed container and secure the height of the oil surface of the space on the compressor portion side to ensure the oil supply to each sliding portion of the compressor portion and to obtain high reliability. A horizontal rotary compressor is provided.
The horizontal hermetic compressor is divided into an oil reservoir space portion in which a compression mechanism portion is accommodated and a motor portion side space portion in which the motor portion is accommodated, and a partition means side space portion of the motor portion side space portion. Then, the non-partitioning unit side space part, the first discharge pipe, the connecting pipe, the second discharge pipe, the oil storage part space part, and the third discharge pipe are again discharged out of the sealed container.
[Selection] Figure 1

Description

  The present invention relates to a horizontal hermetic compressor, and more particularly to a horizontal hermetic compressor that can improve the flow sequence of high-pressure gas and perform reliable oil supply.

  Generally, since the temperature in a hermetic container rises due to heat generated from the compressor unit and the motor unit, the hermetic compressor is cooled. As a method for cooling the inside of a conventional horizontal hermetic compressor, as disclosed in Patent Document 1, a method is known in which discharge gas is once guided outside the hermetic container, cooled, and then returned to the hermetic container.

However, since the thing of patent document 1 does not consider at all about the height of the oil level for oil supply, the height of the oil level of the compressor part side space part cannot be made high, and compression During operation, there may be a problem with the oil supply to the compressor section, and when the compressor is operated in an inclined state, for example, the oil level in the oil suction section decreases and sufficient suction cannot be performed. Lubrication to the sliding part will be insufficient.
JP-A-6-167289 (paragraph [0020], FIG. 1)

  The present invention has been made in consideration of the above-described circumstances, and cools the sealed container and secures the oil surface height of the compressor portion side space portion to supply oil to each sliding portion of the compressor portion. It is an object of the present invention to provide a horizontal rotary compressor capable of obtaining high reliability.

  In order to achieve the above object, according to one aspect of the present invention, the inside of a sealed container in which an electric compressor body having a horizontal rotation shaft is internally partitioned by partition means, and one side of the partition means is a compression mechanism section. Is divided into an oil reservoir space portion in which the electric motor portion is housed, and the other side is divided into an electric motor portion side space portion in which the electric motor portion is housed, and the oil reservoir portion space portion and the electric motor portion side space portion are provided below the partition means And the gas compressed by the compression mechanism part is divided into a partitioning part side space part of the motor part side space part, an antipartitioning part side space part of the motor part side space part, A first discharge pipe provided between the space part on the side opposite to the partitioning means and a connection pipe provided outside the sealed container; the connection pipe provided continuously to the first discharge pipe; the connection pipe and the oil reservoir; A second discharge pipe provided between the spaces, the oil reservoir space, and the oil reservoir In order third discharge pipe provided in the closed container communicates with the part space, horizontal hermetic compressor, characterized in that so as to be discharged into the sealed container is provided.

  According to the horizontal hermetic compressor according to the present invention, the inside of the hermetic container is cooled and the oil level of the oil reservoir space is ensured, and the oil supply to each sliding portion of the compressor is ensured. As a result, it is possible to provide a horizontal hermetic compressor capable of obtaining high reliability.

  Hereinafter, an embodiment of a horizontal hermetic compressor according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a front sectional view showing an embodiment of a horizontal hermetic compressor according to the present invention with a part of a hermetic container cut away, and FIG. 2 is a side sectional view thereof.

  As shown in FIGS. 1 and 2, a horizontal hermetic compressor according to the present invention, for example, a horizontal rotary compressor 1, has a hermetic container 2, and a rotating shaft 3 is horizontally disposed in the hermetic container 2. The electric compressor main body 4 is accommodated.

  The hermetic container 2 is partitioned into an oil storage space 2A and an electric motor space 2B by partition means 5 described later, and the compression mechanism 6 of the electric compressor body 4 is accommodated in the oil storage space 2A. The electric motor unit 7 is accommodated in the electric motor unit side space 2B.

  The compression mechanism section 6 is, for example, a two-cylinder rotary system. The compression mechanism section 6 includes a first compression mechanism section 6A and a second compression mechanism section 6B provided on the left and right sides of the intermediate partition plate 8. It is configured. The first compression mechanism section 6A is disposed on the left side of the intermediate partition plate 8, and the second compression mechanism section 6B is disposed on the right side. Each compression mechanism 6A, 6B includes cylinders 9a, 9b. The cylinder 9a of the first compression mechanism 6A has an outer diameter that is substantially the same as the inner diameter of the sealed container 2, and is fitted to the sealed container 2. Installed in.

  A plate-like pressure partition plate 10 is attached to the side surface of the first cylinder 9a on the side of the motor unit 7 and to the peripheral end portion, and the partition means 5 is constituted by the pressure partition plate 10 and the first cylinder 9a. Has been.

  The first cylinder 9a is made of a casting, and a plurality of arc-shaped casting portions 9c are provided in the peripheral portion. An oil communication hole 11 is formed in the lower part of the pressure partition plate 10 so as to communicate the oil storage part space part 2A and the motor part side space part 2B at a combination position with the cast part 9c on the lower side of the first cylinder 9a. The oil communication hole 11 is in such a position that it is always immersed in the oil.

  One side surface of the cylinder 9 a of the first compression mechanism 6 </ b> A is closed by the main bearing 12, and the other side surface is closed by the intermediate partition plate 8. The outer diameter of the cylinder 9b of the second compression mechanism section 6B is smaller than the outer diameter of the cylinder 9a of the first compression mechanism section 6A. As shown in FIG. It is in close contact with the peripheral surface. One side surface of the cylinder 9b of the second compression mechanism portion 6B is closed by the intermediate partition plate 8, and the other side surface is closed by the auxiliary bearing 13. The main bearing 12, the sub bearing 13, and the intermediate partition plate 8 are integrally fastened and fixed by a fixture 14 screwed from both sides.

  Furthermore, the first discharge cover 15 and the valve cover 16 are attached to the main bearing 12 by the fixture 14, and the second discharge cover 18 is attached to the auxiliary bearing 13.

Inner diameter opening of both cylinders 9a, 9b left and right sides of the form the first cylinder chamber 9a ₁ and the second cylinder chamber 9b ₁ enclosed by the intermediate partition plate 8 and the two bearings 12 and 13, both the cylinder chambers 9a ₁ , crank portion 3a of the rotating shaft 3 facing the 9b _1, the 3b, the eccentric roller 19a, 19b are incorporated fitted to eccentric rotation of the cylinder chamber.

As shown only in the second compression mechanism portion 6B, the tip of the blade 20 is brought into contact with the phase of the eccentric roller 19b in a state where the tip of the blade 20 is elastically pressed along the axial direction, and the inside of both cylinder chambers 9a ₁ and 9b ₁ It is divided into a high pressure side and a low pressure side.

Two suction pipes 22a and 22b communicating with the accumulator 21 provided in the sealed container 2 penetrate the sealed container 2 and are inserted and fixed in mounting holes provided in the sealed container fitting portions of both cylinders 9a and 9b. Yes. This mounting hole is open to both cylinder chambers 9a ₁ and 9b ₁ , and therefore both suction pipes 22a and 22b are in direct communication with both cylinder chambers 9a ₁ and 9b ₁ .

The main bearing 12 and the sub-bearing 13 are provided with discharge valve mechanisms 23a and 23b communicating with both cylinder chambers 9a ₁ and 9b ₁ . The first discharge cover 15 attached to the main bearing 12 covers the discharge valve mechanism 23a of the main bearing 12, and the second discharge cover 18 attached to the sub bearing 13 covers the discharge valve mechanism 23b of the sub bearing 13. Yes. A gas guide hole 15 a is provided in the first discharge cover 15, and the gas that has passed through the gas guide hole 15 a is guided into the valve cover 16. The second discharge cover 18 is not particularly provided with a gas guide hole.

Instead, although not shown, a gas guide passage communicating with the second cylinder 9b via the first cylinder 9a and the intermediate partition plate 8 is provided, and discharged into the second discharge cover 24b. The gas is guided into the first discharge cover 15 through the gas guide passage. That is, in the first discharge cover 15, the gas compressed in the _first cylinder chamber 9 a ₁ and the gas compressed in the second cylinder chamber 9 b ₁ merge, and the first discharge cover 15 The gas guide hole 15 a is led into the valve cover 16.

Further, the valve cover 16 be provided a gas hole 16a, wherein the gas is circulated to and joined, is discharged to the partition means side space 2B in the _first motor-side space portion 2B. A terminal-side space 2B ₂ that is an anti-partitioning-unit-side space is formed on the power-feeding terminal side in which the power-feeding terminal 26 is provided in the sealed container 2 of the motor-side space 2B. The high pressure gas discharged into the partition means side space 2B ₁ flows into the part 2B ₂ through a gap provided in the electric motor part 7, and further, the sealed container 2 has a central part thereof. A first discharge pipe 27 is provided, and the high-pressure gas that has flowed into the terminal-side space 2B ₂ is discharged out of the sealed container 2 through the first discharge pipe 27, and further, the first discharge pipe 27 is discharged to the second discharge pipe 30 via a connecting pipe 28 connected to the connecting pipe 27 and a radiator 29 connected to the connecting pipe 28. Since the first discharge pipe 27 is provided in the central portion of the sealed container 2, the separation efficiency of oil in the high-pressure gas flowing into the terminal-side space through the gap between the stator 7s and the rotor 7r is high. improves.

  In addition, although a heat radiator takes heat from high pressure gas and reduces the temperature of high pressure gas, providing a heat radiator is preferable, but it is not essential. The second discharge pipe 30 is provided in the sealed container 2 so as to communicate with the oil reservoir space 2A. Further, the second discharge pipe 30 communicates with the oil reservoir space 2A and is provided in the sealed container 2. The discharge pipe 31 is provided. Accordingly, the high-pressure gas discharged to the second discharge pipe 30 is discharged to the oil storage space 2A, and is discharged again from the oil storage space 2A to the third discharge pipe 31 provided in the sealed container 2. These are discharged to a heat exchanger of a refrigeration cycle (not shown) communicated with the third discharge pipe 31. Here, the passage resistance of the first discharge pipe, the meandering or winding or linear connecting pipe, and the second discharge pipe causes a pressure loss of the discharge gas, and the pressure in the oil reservoir space is changed to the motor side. It is also possible to make it lower than the pressure in the space.

On the other hand, the rotation shaft 3 is provided with a center hole 3c for oil supply along the center axis from the end surface on the auxiliary bearing side to the main bearing facing portion. the cylinder chamber 9a ₁ and second eccentric roller 19a of the cylinder chamber 9b _1, the oil guide hole 3d which respectively communicate inside and the 19b is provided for.

  The opening of the end surface of the rotating shaft 3 of the oil supply center hole 3c is closed by the second discharge cover 18, and the oil supply center hole 3c has a sealed structure. The second discharge cover 18 is connected to an oil suction pipe 32 integrally formed by welding with the same type of iron member as the second discharge cover 18, and this open end has a center hole for oil supply. It faces 3c. The other end of the oil suction pipe 32 is always immersed in the lubricating oil in the oil reservoir 2d formed in the lower part of the closed container 2. Accordingly, the oil suction pipe 32, the oil supply center hole 3c, and the oil guide hole 3d constitute an oil supply path 3e. The oil supply path 3e forms the oil reservoir 2d, the first compression mechanism section 6A, and the second compression mechanism. Each sliding part of the part 6B is connected.

  A pump member (not shown) such as a torsion pump is preferably provided in the oil supply center hole 3c on the end side of the rotary shaft 3. This torsion pump cuts from one end of the plate piece and shifts both sides of the plate piece so that an effective centrifugal force is applied to the lubricating oil in the center hole 3c when the rotary shaft 3 rotates.

The electric motor unit 7 includes a stator 7s fixed to the inner surface of the hermetic container 2, and a rotor 7r that is disposed inside the stator 7s with a predetermined gap and into which the rotating shaft 3 is inserted. becomes high-pressure gas discharged in the partition means side space 2B ₁ is adapted Komu flow to the motor unit side space 2B via the air passage provided on the outer periphery of the gap and the stator 7s.

  Next, the refrigerant compression operation using the horizontal rotary compressor will be described.

  As shown in FIG. 1, the rotating shaft 3 is rotationally driven by energizing the motor section 7 of the horizontal rotary compressor 1, and the compressor 1 is driven from the refrigeration cycle through the accumulator 21 and the two suction pipes 22a and 22b. The refrigerant gas that has evaporated is introduced.

In both the cylinder chambers 9a ₁ and 9b ₁ in the first compression mechanism section 6A and the second compression mechanism section 6B, the eccentric rollers 19a and 19b are eccentrically rotated, and the refrigerant gas is introduced into both the cylinder chambers 9a ₁ and 9b ₁ . Compressed.

The compressed high-pressure gas is discharged into the first discharge cover 15 and the second discharge cover 18, respectively. Thereafter, all of the high pressure gas is temporarily filling the valve cover 16, wherein after the muffler effect is obtained, is discharged to the partition means side space 2B ₁ of the electric motor portion side space 2B through the gas hole 16a .

The high-pressure gas is discharged to the terminal-side space 2B ₂ through the gap and vent path formed in the motor unit 7 from the partition means side space 2B _1. At this time, the pressure of the motor unit side space 2B in other words partition means side space 2B ₁ and the terminal-side space 2B ₂ becomes substantially equal P _1.

The high-pressure gas that has flowed out into the terminal side space 2B ₂ is once discharged out of the hermetic container 2 through the first discharge pipe 27 and further out to the radiator 29 through the connecting pipe 28. The high-pressure gas having the pressure P ₁ is radiated by the radiator 29 and the temperature is lowered, and is discharged to the oil storage space 2A through the connecting pipe 28 and the third discharge pipe 31. The pressure also decreases by ΔP due to the passage resistance, and the oil storage space 2A is filled with a gas having a pressure P ₂ (P ₂ = P ₁ −ΔP) lower than the pressure P ₁ of the motor space 2B. As a result, the gas in the sealed container 2, particularly the oil storage space 2 </ b> A, is cooled by the gas whose temperature has decreased. The high-pressure gas having the pressure P ₂ filled in the oil storage space 2A is again discharged out of the sealed container 2 through the third discharge pipe 31 and sent to the heat exchanger.

Meanwhile, oil stored in the lower position of the oil reservoir 2d of the motor unit side space 2B in other words partition means side space 2B ₁ and the terminal-side space 2B ₂ has a pressure P ₁ of the motor unit side space 2B Since ΔP is higher than the pressure P _{2 of the} oil storage space 2A, it is pressed with a higher pressure P ₁ and only the pressure difference is applied to the oil storage space 2A of the pressure P ₂ through the oil communication hole 11 of the pressure partition plate 10. Inflow. Therefore, the oil level height Lc during operation of the oil reservoir space 2A is higher than the oil level height La when the operation is stopped.

The oil suction pipe 32 sucks up oil from the oil reservoir 2d whose oil level is sufficiently raised, and the oil reservoir space through the oil supply passage 3e composed of the oil supply center hole 3c and the oil guide hole 3d. by utilizing the pressure difference between the lower cylinder chamber is somewhat lower pressure P ₃ compared to 2A, oil is supplied to each sliding portion of the first compression mechanism unit 6A and the second compression mechanism unit 6B are lubricated and cooled The

  Further, since the oil level Lb in the motor unit side space 2B during operation is lower than the oil level La when stationary, the rotor 7r of the motor unit 7 is positioned above the height Lb of the oil level. Therefore, the rotor 7r does not rotate while splashing oil, and energy loss can be prevented.

  As described above, according to the horizontal rotary compressor of the present embodiment, the oil suction pipe reliably sucks up oil from the oil reservoir portion where the oil level is sufficiently raised, and can supply oil to the compression mechanism portion. As a result, it is possible to reliably supply the oil to the sliding parts of the part, and further, the hermetic container is cooled by the gas whose temperature has been lowered, and a horizontal rotary compressor in which high reliability is obtained is realized. In particular, even when the compressor is operated in an inclined state, the oil level at the oil suction part is secured, sufficient suction can be achieved by the oil suction pipe, and sufficient lubrication to each sliding part can be performed. .

  As described above, since the horizontal hermetic compressor according to the present invention can supply sufficient oil, it is most suitable for a horizontal inverter compressor that is often operated at a high speed.

  Further, the horizontal hermetic compressor according to the present invention is not limited to the rotor compressor, and can be applied to, for example, a scroll compressor.

The front sectional view which cuts and shows a part of airtight container of the horizontal type rotary compressor concerning the present invention. 1 is a side sectional view of a horizontal rotary compressor according to the present invention.

Explanation of symbols

1 ... horizontal rotary compressor, 2 ... sealed container, 2A ... oil reservoir space, 2B ... motor unit side space, 2B 1 _... partition means side space, 2B 2 _... terminal-side space, 2d ... oil reservoir , 3 ... rotating shaft, 4 ... electric compressor body, 5 ... partitioning means, 6 ... compression mechanism part, 6A ... first compression mechanism part, 6B ... second compression mechanism part, 7 ... electric motor part, 7s ... Stator, 7r ... rotor, 8 ... intermediate partition plate, 9a ... first cylinder, 9b ... second cylinder, 11 ... oil communication hole, 12 ... main bearing, 13 ... sub-bearing, 14 ... mounting tool, 15 DESCRIPTION OF SYMBOLS ... 1st discharge cover, 16 ... Valve cover, 18 ... 2nd discharge cover, 21 ... Accumulator, 26 ... Power supply terminal, 27 ... 1st discharge pipe, 28 ... Connecting pipe, 29 ... Radiator, 30 ... 2nd discharge pipe, 31 ... 3rd discharge pipe, 32 ... oil suction pipe.

Claims (2)

The inside of the sealed container in which the main body of the electric compressor having a horizontal rotating shaft is partitioned by a partition means, one side of this partition means is an oil storage space that accommodates the compression mechanism, and the other side is a motor part. An oil communication hole that is divided into a motor-side space portion to be accommodated and that communicates the oil reservoir space portion and the motor-side space portion is provided below the partition means, and is compressed by the compression mechanism portion. The separated gas is a partition means side space part of the motor part side space part, an antipartition means side space part of the motor part side space part, and a space between the antipartition means side space part and a connecting pipe provided outside the sealed container. The first discharge pipe provided in the first discharge pipe, the connection pipe connected to the first discharge pipe, the second discharge pipe provided between the connection pipe and the oil reservoir space, the oil reservoir A third discharge provided in the airtight container in communication with the space and the oil storage space In order, horizontal hermetic compressor, characterized in that so as to be discharged into the sealed container. 2. The horizontal compressor according to claim 1, wherein a radiator that dissipates heat by passing compressed gas discharged from the hermetic container is provided outside the hermetic container, and the compressed gas after heat radiation is again stored in the oil container in the hermetic container. A horizontal hermetic compressor characterized by being returned to the space.

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