JP2021021370A - Scroll compressor - Google Patents

Abstract

To provide a scroll compressor which is high in efficiency by suppressing the heating of a refrigerant in an injection path by a discharged refrigerant.SOLUTION: A scroll compressor comprises an injection pipe 95 for injecting a refrigerant in an intermediate pressure state to a compression chamber 15, and is constituted so that a high-temperature refrigerant discharged from a discharge port 17 of the compressor 15 is discharged to the outside without going through the vicinity of the injection pipe 95. By this constitution, the heating of the refrigerant in the injection pipe 95 is suppressed, an injection rate can be thus enhanced, and the high-efficiency compressor can be provided.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a scroll compressor used in a refrigerating cycle device such as an air conditioner, a water heater, and a refrigerator.

Patent Document 1 discloses a scroll compressor having an injection function. As shown in FIG. 8, this scroll compressor includes a compression mechanism 102 and a motor 103 for driving the compression mechanism 102 in a closed container 101, and forms a gas injection port 105 in the fixed scroll 104 of the compression mechanism 102 for compression. An injection pipe 107 for introducing an intermediate pressure gas refrigerant is connected to the chamber 106.

Japanese Patent No. 4614441

The present disclosure provides a highly efficient compressor that suppresses heating of the gas refrigerant flowing in the injection pipe, increases the injection rate, and provides a highly efficient compressor.

In the scroll compressor of the present disclosure, a compression mechanism portion provided in a closed container, an injection pipe for injecting a refrigerant in an intermediate pressure state into the compression chamber of the compression mechanism, and a refrigerant gas compressed by the compression mechanism portion are contained in the closed container. A first discharge space for discharging from a discharge port provided near the center of the closed container and a second discharge space provided with a discharge pipe for guiding the refrigerant gas to the outside of the closed container are provided with respect to the center of the closed container. , One or a plurality of communication passages communicating the first discharge space and the second discharge space are provided at eccentric positions, and a plane including the center of the inflow portion of the communication passage and the central axis of the closed container is the first reference plane. Of the four segments obtained by dividing the compressor between the first reference plane and the second reference plane, the plane including the central axis and perpendicular to the first reference plane is defined as the second reference plane. The inflow part of the passage is provided in the first quadrant segment and the second quadrant segment, and the segment opposite to the first quadrant segment and adjacent to the second quadrant segment is the third quadrant segment, opposite the second quadrant segment and the first quadrant segment. When the segment adjacent to is defined as the fourth quadrant segment, the center of the injection tube is provided in the third quadrant segment or the fourth quadrant segment.

The scroll compressor in the present disclosure can suppress the heating of the refrigerant in the injection pipe by allowing the relatively high temperature refrigerant discharged from the discharge port to flow so as not to pass through the vicinity of the injection pipe and not directly heating the injection pipe. .. Therefore, the injection rate can be increased, and a highly efficient scroll compressor can be provided.

Vertical sectional view showing the configuration of the scroll compressor according to the first embodiment. Top view showing the configuration of the scroll compressor according to the first embodiment. Cross-sectional view of the compression mechanism portion in a state where the fixed scroll and the swivel scroll of the scroll compressor according to the first embodiment are meshed with each other. The gas injection refrigeration cycle diagram of the refrigeration cycle apparatus using the scroll compressor according to the first embodiment. A vertical sectional view showing the configuration of the scroll compressor according to the second embodiment. A plan view showing the configuration of the scroll compressor according to the second embodiment. Enlarged sectional view of a main part showing the compression mechanism part of the scroll compressor according to the second embodiment. Longitudinal section of a conventional scroll compressor

(Knowledge, etc. that was the basis of this disclosure)
At the time when the inventors came up with the present disclosure, the scroll compressor shown in Patent Document 1 was known. In this scroll compressor, the discharged refrigerant having a relatively high temperature inside the closed container flows in the vicinity of the injection pipe. Therefore, the gas refrigerant in the injection pipe is heated, the gas refrigerant is not introduced into the compression chamber at the optimum pressure, and a sufficient amount of injection cannot be supplied to the compression chamber to improve the efficiency of the compressor. There are challenges. The inventors have discovered such a problem and have come to construct the subject matter of the present disclosure in order to solve the problem.

Therefore, the present disclosure provides a highly efficient compressor by suppressing heating of the gas refrigerant in the injection pipe to increase the injection rate.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessarily redundant explanations below and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4.

[1-1. Constitution]
FIG. 1 is a vertical cross-sectional view of the compressor according to the first embodiment of the present disclosure. Further, FIG. 2 is a plan view of the compressor of FIG. 1 as viewed from above. The operation and operation of the scroll compressor configured as shown in the figure will be described below.

As shown in FIG. 1, the compressor of the present disclosure is configured by providing a compression mechanism portion 10 and an electric motor portion 20 inside the closed container 1.

The compression mechanism portion 10 includes a main bearing member 11 of a shaft 5 fixed in a closed container 1 by welding or shrink fitting, a fixed scroll 12 bolted onto the main bearing member 11, and the main bearing member 11. It is composed of a swivel scroll 13 that is sandwiched between the fixed scroll 12 and forms a compression chamber 15 with the fixed scroll 12.

A rotation restraint mechanism 14 is provided between the rotation scroll 13 and the main bearing member 11 by an old dam ring or the like that prevents the rotation of the rotation scroll 13 and guides it to move in a circular orbit, and an eccentric shaft at the upper end of the shaft 5. By eccentrically driving the swivel scroll 13 in the portion 5a, the swivel scroll 13 is moved in a circular orbit.

As a result, the compression chamber 15 formed between the fixed scroll 12 and the swivel scroll 13 moves from the outer peripheral side toward the central portion while reducing the volume. Utilizing this movement, the refrigerant gas is sucked from the suction pipe 3 which has passed through the refrigeration cycle outside the closed container 1 through the suction chamber 16 which is always the suction pressure provided in the fixed scroll 12, and is closed in the compression chamber 15. After packing, compress. The refrigerant gas that has reached a predetermined pressure pushes open the reed valve 18 from the discharge port 17 at the center of the fixed scroll 12 and is discharged into the first discharge space 37.

A pump 6 is provided at the lower end of the shaft 5 that drives the swivel scroll 13. The pump 6 is arranged so that its suction port is located in the oil storage unit 2. Since the pump 6 is driven at the same time as the scroll compressor, the pump 6 can reliably suck up the oil in the oil storage section 2 provided at the bottom of the closed container 1 regardless of the pressure condition and the operating speed. Eliminate the worry of running out of oil. The oil sucked up by the pump 6 is supplied to the compression mechanism portion 10 through the oil supply hole 7 penetrating the inside of the shaft 5. If the oil is configured to remove foreign matter from the oil with an oil filter or the like before or after the oil is sucked up by the pump 6, it is possible to prevent foreign matter from entering the compression mechanism portion 10 and further improve reliability. ..

The pressure of the oil guided to the compression mechanism portion 10 is substantially the same as the discharge pressure of the scroll compressor, and also serves as a back pressure source for the swivel scroll 13. As a result, the swivel scroll 13 does not separate from the fixed scroll 12 or hit one side, and stably exerts a predetermined compression function. Further, a part of the oil enters the fitting portion between the eccentric shaft portion 5a and the swivel scroll 13 and the bearing portion 8 between the shaft 5 and the main bearing member 11 so as to seek an escape place by the supply pressure and its own weight. After lubricating each part, it falls and returns to the oil storage part 2.

Another portion of the oil supplied to the high pressure region 35 is a back pressure chamber in which the rotation restraint mechanism 14 is located through a path 7a formed in the swivel scroll 13 and having one opening end in the high pressure region 35. Enter 36. The oil that has entered lubricates the thrust sliding portion and the sliding portion of the rotation restraint mechanism 14, and also plays the role of applying the back pressure of the swivel scroll 13 in the back pressure chamber 36.

Here, the compression of the refrigerant gas will be described in detail. FIG. 3 is a cross-sectional view of the compression mechanism unit 10 in a state where the swivel scroll 13 is engaged with the fixed scroll 12, and is a diagram showing a state in which the phases are shifted in 90 degree increments in the order of (a) to (d). is there. Here, a compression chamber formed by being surrounded by the lap outer wall of the swivel scroll 13 and the lap inner wall of the fixed scroll 12 is formed by being surrounded by the first compression chamber 15a, the lap inner wall of the swivel scroll 13 and the lap outer wall of the fixed scroll 12. The compression chamber to be generated is referred to as a second compression chamber 15b.

FIG. 3A shows a state at the moment when the first compression chamber 15a traps the refrigerant gas, and the compression chamber is 15a-1. After that, the first compression chamber 15a includes 15a-2 of (b), 15a-3 of (c), 15a-4 of (d), 15a-5 of (a), and 15a-6 of (b). It moves to 15a-7 in (c), and in 15a-8 in (d), it is discharged to the first discharge space 37 through the discharge port 17 formed in the center of the fixed scroll 12.

Similarly, in the second compression chamber 15b, FIG. 3C shows a state at the moment when the second compression chamber 15b traps the refrigerant gas, and the compression chamber 15b sequentially moves toward the center and the fixed scroll. It is discharged to the first discharge space 37 through the discharge port 17 formed in the central portion of 12.

Here, the suction chamber 16 in which the compression chamber 15a and the compression chamber 15b are always in the region where the suction pressure is applied is the lap of the fixed scroll 12 and the swivel scroll 13 at the moment when the refrigerant gas is confined in each compression chamber. The area is downstream from the area where the contacts are connected.

As shown in FIG. 1, the refrigerant gas discharged into the first discharge space 37 passes through the communication passage 39 from the inflow portion 42 of the communication passage 39 provided at a plurality of eccentric positions with respect to the center of the closed container 1. It is discharged into the second discharge space 38 provided with the discharge pipe 4, and is discharged from the discharge pipe 4 to the outside of the closed container 1.

FIG. 4 is a refrigeration cycle diagram of the refrigeration cycle apparatus according to the embodiment equipped with the compressor of the present disclosure.

As shown in FIG. 4, the refrigeration cycle apparatus of the present embodiment includes a compressor 91, a condenser 92, an evaporator 93, a decompressor 94, an injection pipe 95, and a gas-liquid separator 96.

In the gas-liquid separator 96, the refrigerant condensed in the condenser 92 is decompressed by the decompressor 94, and a part of the evaporated gas refrigerant and the liquid refrigerant are separated. The liquid refrigerant further passes through the decompressor 94, becomes a low-pressure refrigerant, and is guided to the evaporator 93. On the other hand, the gas refrigerant separated by the gas-liquid separator 96 passes through the injection pipe 95 and is guided to the intermediate pressure chamber in the compressor 91. The injection pipe 95 may be provided with a closing valve or a pressure reducing device to provide means for adjusting and stopping the injection pressure.

The refrigerant that has been further depressurized to a lower pressure by the decompressor 94 and sent to the evaporator 93 evaporates the liquid refrigerant by heat exchange and is discharged as a gas refrigerant or a gas refrigerant mixed with a part of the liquid refrigerant. The refrigerant discharged from the evaporator 93 is guided to the suction pipe 3 of the compressor 91 and is taken into the compression mechanism portion inside the compressor.

As for the ratio of the refrigerant gas and the liquid refrigerant separated by the gas-liquid separator 96, the larger the pressure difference between the high pressure and the low pressure in the refrigeration cycle, the larger the gas component.

In the scroll compressor of the present embodiment, as shown in FIG. 1, one or more injection ports 54 for injecting an intermediate pressure refrigerant from the injection tube 95 are provided on the end plate of the fixed scroll 12, and the injection ports 54 are provided. , As shown in FIG. 3, the injection refrigerants are sequentially opened to the first and second compression chambers to feed the injection refrigerant, and when the injection port 54 starts to open, all the compression chambers are closed. It is provided at a position during the compression process. As a result, the injection refrigerant can be compressed without flowing back to the suction pipe, so that the amount of refrigerant circulation can be increased without reducing the efficiency, and highly efficient injection operation becomes possible.

Here, as shown in FIG. 2, the center line 51 of the inflow portion 42 of the communication passage 39 communicating the first discharge space 37 and the second discharge space 38 in the closed container 1 and the central axis of the closed container 1 are included. The plane is the first reference plane H1, the plane including the central axis of the closed container 1 and perpendicular to the first reference plane H1 is the second reference plane H2, and the compressor is the first reference plane H1 and the second reference plane H2. Of the four segments Q1, Q2, Q3, and Q4 obtained by dividing, the inflow portion 42 of the communication passage 39 is provided in the first quadrant segment Q1 and the second quadrant segment Q2, and is opposite to the first quadrant segment Q1. When the segment adjacent to the second quadrant segment Q2 is defined as the third quadrant segment Q3, and the segment opposite to the second quadrant segment Q2 and adjacent to the first quadrant segment Q1 is defined as the fourth quadrant segment Q4, the refrigerant in the intermediate pressure state is defined. The center of the injection tube 95 that injects into the compression chamber is provided in the third quadrant segment Q3 or the fourth quadrant segment Q4. In this example, the third quadrant segment Q3 and the fourth quadrant segment Q4 are provided on the dividing line.

[1-2. motion]
The operation according to this embodiment will be described below.

In the scroll compressor of the present embodiment, the relatively high temperature refrigerant gas discharged from the discharge port 17 heads toward the inflow portion 42 of the communication passage 39 provided on the side opposite to the side where the injection pipe 95 is provided. The gas flows into the second discharge space 38 through the communication passage 39 without passing through the vicinity of the injection pipe 95.

As a result, heating of the refrigerant gas in the injection by the relatively high temperature refrigerant gas discharged from the discharge port 17 is suppressed, the injection rate can be increased, and a highly efficient scroll compressor can be obtained.

[1-3. Effect, etc.]
As described above, the scroll compressor of the present disclosure includes a compression mechanism unit, an injection pipe for injecting a refrigerant in an intermediate pressure state into the compression chamber of the compression mechanism, and the compression mechanism in a closed container having a discharge atmosphere inside. One or a plurality of communication passages communicating the first discharge space, the second discharge space, and the first discharge space and the second discharge space are provided, and the inflow portion of the communication passage is provided. The plane including the center of the container and the central axis of the closed container is the first reference plane, the plane including the central axis and perpendicular to the first reference plane is the second reference plane, and the compressor is the first reference plane and the second reference plane. Of the four segments obtained by dividing by a plane, the passages are provided in the first quadrant segment and the second quadrant segment, and the segment opposite the first quadrant segment and adjacent to the second quadrant segment is the third quadrant segment. When the segment opposite to the second quadrant segment and adjacent to the first quadrant segment is defined as the fourth quadrant segment, the center of the injection pipe that injects the refrigerant in the intermediate pressure state into the compression chamber is the third quadrant segment or the third quadrant segment. It is provided in 4 quadrant segments.

As a result, the relatively high temperature refrigerant discharged from the discharge port can flow in a manner that does not pass through the vicinity of the injection pipe, and the injection pipe can be prevented from being directly heated. Therefore, it is possible to suppress the heating of the refrigerant in the injection pipe, increase the injection rate, obtain a highly efficient scroll compressor, and increase the cooling / heating capacity of the refrigeration cycle device using the scroll compressor.

(Embodiment 2)
[2-1. Constitution]
FIG. 5 is a vertical cross-sectional view of the compressor according to the second embodiment of the present disclosure.

The compressor of the second embodiment has a configuration in which the discharge pipe 4 is directly drawn out from the discharge space above the compression mechanism portion 10 (hereinafter, this discharge space is referred to as a second discharge space 38). Therefore, a muffler 19 that covers the discharge port 17 and the lead valve 18 is provided on the surface of the fixed scroll 12 on the second discharge space 38 side. The muffler 19 isolates a discharge space (hereinafter, this discharge space is referred to as a first discharge space 37) from which the refrigerant gas is discharged from the discharge port 17 from the second discharge space 38, and the first discharge space 37 is a fixed scroll. It communicates with the second discharge space 38 through the inflow portion 42, the communication passage 39, and the delivery port 43 provided in 12.

Therefore, the refrigerant gas discharged from the discharge port 17 by pushing the reed valve 18 into the first discharge space 37 is discharged from the inflow portion 42 of the communication passage 39 via the communication passage 39 and from the delivery port 43 of the communication passage 39. 2 The gas is discharged into the discharge space 38, and is discharged to the outside of the closed container 1 by the discharge pipe 4.

Here, in the compressor according to the present embodiment, as shown in FIG. 6, the distance F between the center of the injection pipe 95 and the outlet 43 of the communication passage 39 is set to the distance F between the discharge pipe 4 and the outlet 43 of the communication passage 39. It is larger than the distance G.

In the present embodiment, the communication passage 39 has a function of swirling and separating the oil. The configuration will also be described below.

FIG. 7 is an enlarged cross-sectional view of a main part of the compression mechanism portion in FIG. 5, and 40 is an oil separation mechanism portion.

The oil separation mechanism portion 40 includes a cylindrical space 41 for swirling the refrigerant gas, an inflow portion 42 communicating the first discharge space 37 in the muffler 19 and the cylindrical space 41, a cylindrical space 41, and another first. 2. It has an outlet 43 that communicates with the discharge space 38, and an outlet 44 that communicates the cylindrical space 41 and the space on the side of the electric motor unit 20.

The cylindrical space 41 is composed of a first cylindrical space 41a formed in the fixed scroll 12 and a second cylindrical space 41b formed in the main bearing member, and constitutes a communication passage 39.

The inflow portion 42 communicates with the first cylindrical space 41a, and preferably an opening of the inflow portion 42 is formed on the inner peripheral surface of the upper end of the first cylindrical space 41a. Then, the inflow unit 42 causes the refrigerant gas discharged from the compression mechanism unit 10 to flow into the cylindrical space 41 from the first discharge space 37 in the muffler 19. The inflow portion 42 opens in the tangential direction with respect to the cylindrical space 41.

The delivery port 43 is formed on the upper end side of the cylindrical space 41, and is formed at least on the second discharge space 38 side of the inflow portion 42. The delivery port 43 is preferably formed on the upper end surface of the first cylindrical space 41a. Then, the delivery port 43 delivers the refrigerant gas separated from the oil from the cylindrical space 41 to the second discharge space 38.

The discharge port 44 is formed on the lower end side of the cylindrical space 41, and is formed at least on the motor portion 20 side of the inflow portion 42. The discharge port 44 is preferably formed on the lower end surface of the second cylindrical space 41b. Then, the discharge port 44 discharges the separated oil and a part of the refrigerant gas from the cylindrical space 41 to the space on the side of the electric motor portion 20.

Here, it is preferable that the cross-sectional area A of the opening of the delivery port 43 is smaller than the cross-sectional area C of the cylindrical space 41 and larger than the cross-sectional area B of the opening of the discharge port 44. When the cross-sectional area A of the opening of the delivery port 43 is the same as the cross-sectional area C of the cylindrical space 41, the swirling flow of the refrigerant gas is not guided in the direction of the discharge port 44 and is blown out from the delivery port 43. .. Further, when the cross-sectional area B of the opening of the discharge port 44 is the same as the cross-sectional area C of the cylindrical space 41, the swirling flow of the refrigerant gas is blown out from the discharge port 44.

Further, by making the cross-sectional area A of the opening of the delivery port 43 larger than the cross-sectional area B of the opening of the discharge port 44, the flow path resistance at the delivery port 43 is reduced. As a result, the refrigerant gas is more likely to flow to the delivery port 43 than to the discharge port 44. As an example, A / B is set to about 9.

In the present embodiment, the outer peripheral portion of the fixed scroll 12 is bored to form the first cylindrical space 41a, and the outer peripheral portion of the main bearing member 11 is bored to form the second cylindrical space. Form 41b. Further, on the anti-wrap side end surface of the fixed scroll 12, a groove is formed that opens tangentially to the first cylindrical space 41a, and a part of the groove on the first cylindrical space 41a side is formed by the muffler 19. By covering it, the inflow portion 42 is formed. Further, the delivery port 43 is composed of a hole formed in the muffler 19, and this hole is arranged in the opening of the first cylindrical space 41a. Further, the discharge port 44 is composed of a hole formed in the bearing cover 45, and this hole is arranged in the opening of the second cylindrical space 41b.

[2-2. motion]
The operation according to this embodiment will be described below.

In the scroll compressor of the present embodiment, the refrigerant having a relatively high temperature is discharged from the discharge port 17 into the first discharge space 37 partitioned by the muffler. Then, it is discharged from the inflow portion 42 of the continuous passage 39 to the second discharge space 38 via the continuous passage 39, and flows from the discharge pipe 4 to the drawing portion. Here, since the discharge pipe 4 is closer to the inflow portion 42 of the communication passage 39 than the injection pipe 95, the refrigerant having a relatively high temperature moves from the discharge pipe 4 to the outside of the closed container 1 without passing through the vicinity of the injection pipe 95. Will flow.

As a result, the heating of the refrigerant in the injection pipe 95 can be suppressed, the injection rate can be increased, and a highly efficient scroll compressor can be obtained.

Next, the operation of the oil separation mechanism unit 40 according to the present embodiment will be described.

The refrigerant gas discharged into the first discharge space 37 in the muffler 19 is guided to the cylindrical space 41 via the inflow portion 42 formed in the fixed scroll 12. Since the inflow portion 42 is open in the tangential direction with respect to the cylindrical space 41, the refrigerant gas sent from the inflow portion 42 flows along the inner wall surface of the cylindrical space 41, and is the inner circumference of the cylindrical space 41. A swirling flow is generated on the surface. This swirling flow becomes a flow toward the discharge port 44.

The refrigerant gas contains oil supplied to the compression mechanism unit 10, and while the refrigerant gas is swirling, the oil having a high specific gravity adheres to the inner wall of the cylindrical space 41 by centrifugal force, and becomes the refrigerant gas. To separate.

The swirling flow generated on the inner peripheral surface of the cylindrical space 41 turns back after reaching the discharge port 44 or in the vicinity of the discharge port 44, and changes to an upward flow passing through the center of the cylindrical space 41.

The refrigerant gas from which the oil has been separated by centrifugal force reaches the delivery port 43 by the upward flow and is sent out to the second discharge space 38. The refrigerant gas delivered to the second discharge space 38 is sent to the outside of the closed container 1 from the discharge pipe 4 provided in the second discharge space 38, and is supplied to the refrigeration cycle.

Further, the oil separated in the cylindrical space 41 is sent out from the discharge port 44 to the space on the motor portion 20 side together with a small amount of refrigerant gas. The oil sent out to the space on the side of the electric motor unit 20 reaches the oil storage unit 2 through the wall surface of the closed container 1 and the continuous passage of the electric motor unit 20 due to its own weight.

The refrigerant gas sent out to the space on the side of the electric motor section 20 passes through the gap of the compression mechanism section 10 to reach the second discharge space, and is sent out from the discharge pipe 4 to the outside of the closed container 1.

According to the present embodiment, most of the high-temperature and high-pressure refrigerant gas compressed by the compression mechanism unit 10 and sent out from the oil separation mechanism unit 40 is guided to the second discharge space 38 and discharged from the discharge pipe 4. To. Therefore, since most of the high-temperature and high-pressure refrigerant gas does not pass through the electric motor unit 20, the electric motor unit 20 is not heated by the refrigerant gas, and the efficiency of the electric motor unit 20 can be improved.

Further, according to the present embodiment, by guiding most of the high-temperature and high-pressure refrigerant gas to the second discharge space 38, it is possible to suppress the heating of the compression mechanism unit 10 in contact with the space on the side of the electric motor unit 20, so that suction is performed. It is possible to suppress the heating of the refrigerant gas and obtain high volumetric efficiency in the compression chamber.

Further, according to the present embodiment, by forming the cylindrical space 41 in the fixed scroll 12 and the main bearing member 11, the path through which the refrigerant gas flows from the discharge port 17 to the discharge pipe 4 can be shortened and sealed. The container 1 can be miniaturized.

[2-3. Effect, etc.]
As described above, the scroll compressor of the present disclosure includes a compression mechanism unit, an injection pipe that injects a refrigerant in an intermediate pressure state into the compression chamber of the compression mechanism, and the compression mechanism in a closed container having a discharge atmosphere inside. A first discharge space formed by a muffler that covers a discharge port from which the compressed refrigerant gas is discharged, a second discharge space provided with a discharge pipe for guiding the refrigerant gas to the outside, a first discharge space, and a second discharge space. One or a plurality of communication passages are provided, and a plane including the muffler, the center of the delivery portion of the communication passage, and the central axis of the closed container is set as the first reference plane, the central axis, and the first reference plane. Of the four segments obtained by using the vertical plane as the second reference plane and dividing the compressor between the first reference plane and the second reference plane, the inflow portion of the communication passage is the first quadrant segment and the first A segment provided in a two-quadrant segment, opposite to the first quadrant segment and adjacent to the second quadrant segment, is defined as a third quadrant segment, and a segment opposite to the second quadrant segment and adjacent to the first quadrant segment is defined as a fourth quadrant segment. At this time, the center of the injection pipe that injects the gas in the intermediate pressure state into the compression chamber is provided in the third quadrant segment or the fourth quadrant segment, and the distance between the center of the injection pipe and the outlet of the communication passage is discharged. It is larger than the distance between the pipe and the outlet of the connecting passage.

With this configuration, the refrigerant having a relatively high temperature is discharged from the inside of the muffler, which is the first discharge space, to the second discharge space from the inlet / outlet of the communication passage via the communication passage, and then is located closer to the injection pipe. Since it flows from the discharge pipe to the outside of the closed container, it is possible to suppress the heating of the refrigerant in the injection pipe by the high temperature refrigerant, increase the injection rate, and make it a highly efficient scroll compressor, and increase the cooling and heating capacity of the refrigeration cycle device using this. Can be realized.

Further, if the oil separation mechanism is provided in the connecting passage as in the present embodiment, the oil separation can be efficiently performed in a space-saving manner. Even if the oil compatible with the refrigerant gas is used, the oil can be separated from the refrigerant gas in which the oil is compatible and discharged during the cycle, so that the efficiency of the compressor can be further improved.

Further, if the oil separation mechanism is a swirl separation mechanism as in the present embodiment, the oil compatible with the refrigerant gas can be efficiently separated by the centrifugal force of the refrigerant, and the oil separation can be further space-saving and efficient. Can be done.
(Other embodiments)
As described above, the first and second embodiments have been described as examples of the techniques disclosed in the present application, but the following configurations can also be added. For example, the injection tube 95 is inserted and fixed in the fixed scroll 12, and the fixed scroll 12 is made of an aluminum material.

According to this configuration, even if the fixed scroll 12 is made of an aluminum material having a high thermal conductivity, the heating of the refrigerant in the injection can be suppressed by the configuration described in the first and second embodiments. Then, while suppressing the heating in the vicinity of the injection pipe 95, the heat conduction from the injection pipe 95 to the fixed scroll 12 can be suppressed, and the refrigerant gas in the injection pipe 95 and the refrigerant heating in the compression chamber 15 can also be suppressed, so that the injection rate can be suppressed. It is possible to further increase the efficiency and increase the cooling and heating capacity. In addition, the weight of the fixed scroll 12 can be reduced. Further, the suction pipe 3 for guiding the refrigerant gas to the compression mechanism portion 10 is provided in the third quadrant segment Q3 and / or the fourth quadrant segment Q4 described in the first embodiment.

As a result, the relatively high temperature refrigerant gas discharged from the discharge port 17 can flow in a way that does not pass through the vicinity of the suction pipe 3, and the suction heating of the relatively low temperature refrigerant gas in the suction pipe 3 can be performed. High efficiency can be achieved by suppressing and improving volumetric efficiency.

Further, as the refrigerant of the compressor of the present disclosure, R32, carbon dioxide, or a refrigerant having a double bond between carbons can be used.

Since each of the above-described embodiments is for exemplifying the technology in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent scope thereof.

The scroll compressor of the present disclosure can be applied to a scroll compressor having an injection function, and is useful for a refrigeration cycle device such as a hot water heater, an air conditioner, a water heater, or a refrigerator.

1 Sealed container 2 Oil storage part 3 Suction pipe 4 Discharge pipe 10 Compression mechanism part 11 Main bearing member 12 Fixed scroll 12d Wrap tip 13 Swivel scroll 13d Wrap tip 14 Rotation restraint mechanism 15 Compression chamber 16 Suction chamber 17 Discharge port 19 Muffler 20 Electric Part 37 1st discharge space 38 2nd discharge space 39 Continuous passage 40 Oil separation mechanism part 41 Cylindrical space 42 Inflow part 43 Outlet 44 Outlet 51 Central line of continuous passage 54 Injection port 95 Injection pipe H1 1st reference plane H2 2nd reference plane Q1 1st quadrant segment Q2 2nd quadrant segment Q3 3rd quadrant segment Q4 4th quadrant segment

Claims (6)

A closed container with a discharge atmosphere inside and
A compression mechanism provided in the closed container, an electric motor for driving the compression mechanism, and an electric motor.
An injection pipe that injects a refrigerant in an intermediate pressure state into the compression chamber of the compression mechanism,
A first discharge space in which the refrigerant gas compressed by the compression mechanism is discharged from a discharge port provided near the center of the closed container, and
The second discharge space provided with a discharge pipe for guiding the refrigerant gas to the outside of the closed container, and
With
One or a plurality of communication passages communicating the first discharge space and the second discharge space are provided at eccentric positions with respect to the center of the closed container.
The plane including the center of the inflow portion of the communication passage and the central axis of the closed container is defined as the first reference plane, and the plane including the central axis and perpendicular to the first reference plane is defined as the second reference plane. Of the four segments obtained by dividing the compressor on one reference plane and the second reference plane, the inflow portion of the communication passage is provided in the first quadrant segment and the second quadrant segment.
When the segment opposite to the first quadrant segment and adjacent to the second quadrant segment is defined as the third quadrant segment, and the segment opposite to the second quadrant segment and adjacent to the first quadrant segment is defined as the fourth quadrant segment. A scroll compressor characterized in that the center of an injection pipe for injecting a refrigerant in an intermediate pressure state into a compression chamber is provided in the third quadrant segment or the fourth quadrant segment. A closed container with a discharge atmosphere inside and
A compression mechanism provided in the closed container, an electric motor for driving the compression mechanism, and an electric motor.
An injection pipe that injects a refrigerant in an intermediate pressure state into the compression chamber of the compression mechanism,
A first discharge space in which the refrigerant gas compressed by the compression mechanism is discharged from a discharge port provided near the center of the closed container, and
The muffler that covers the discharge port and
The second discharge space provided with a discharge pipe for guiding the refrigerant gas to the outside of the closed container, and
With
One or a plurality of communication passages communicating the first discharge space and the second discharge space are provided at eccentric positions with respect to the center of the closed container.
With the muffler
The plane including the center of the delivery portion of the communication passage and the central axis of the closed container is defined as the first reference plane, and the plane including the central axis and perpendicular to the first reference plane is defined as the second reference plane. Of the four segments obtained by dividing the compressor on one reference plane and the second reference plane, the inflow portion of the communication passage is provided in the first quadrant segment and the second quadrant segment.
When the segment opposite to the first quadrant segment and adjacent to the second quadrant segment is defined as the third quadrant segment, and the segment opposite to the second quadrant segment and adjacent to the first quadrant segment is defined as the fourth quadrant segment. The center of the injection pipe that injects the refrigerant in the intermediate pressure state into the compression chamber is provided in the third quadrant segment or the fourth quadrant segment.
Moreover, the scroll compressor is characterized in that the distance between the center of the injection pipe and the outlet of the communication passage is made larger than the distance between the discharge pipe and the outlet of the communication passage. The scroll compressor according to claim 2, wherein an oil separation mechanism is provided in the communication passage. The scroll compressor according to claim 3, wherein the oil separation mechanism is a swirl separation mechanism. The scroll compressor according to any one of claims 1 to 4, wherein a suction pipe for guiding the refrigerant gas is provided in the compression mechanism portion in the third quadrant and the fourth quadrant. The scroll compressor according to any one of claims 1 to 5, wherein the injection tube is inserted into a fixed scroll, and the fixed scroll is made of an aluminum material.

Images