JP2006052679A - Compressor and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor effectively suppressing oil going up phenomenon at a time of high speed operation and an air conditioner including the compressor. <P>SOLUTION: This compressor 1 includes a casing 2, a drive part 3, a compression mechanism part 4 and a dividing part 7. The compression mechanism part 4 includes a rotor 41 and a compression chamber 42 storing the rotor 41 and eccentrically rotates the rotor 41 to compress fluid sucked in the compression chamber 42. The drive part 3 drives the compression mechanism part 4. The casing 2 stores the drive part 3 and the compression mechanism part 4 and includes oil reservoir of lubricating oil supplied to the compression mechanism part 4. The dividing part 7 divides a space in the casing 2 into a drive part 3 side and an oil reservoir side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a compressor and an air conditioner, and more particularly to a compressor capable of effectively suppressing an oil rising phenomenon during operation at a high rotation speed, and an air conditioner including such a compressor.

  As a conventional compressor, a technique described in Patent Document 1 is known. In the conventional compressor, the bottom of the housing is formed in a substantially dome shape, and lubricating oil supplied to the compression mechanism is stored in this portion (oil reservoir).

  Here, in the conventional compressor, the lubricating oil in the oil sump is agitated during operation at a high rotational speed, and the lubricating oil level of the lubricating oil rises along the wall surface of the bottom of the housing. Then, there is a problem that a phenomenon (so-called oil rising phenomenon) in which the lubricating oil is taken away to the drive unit side above the housing occurs.

JP 2000-80990 A

  Accordingly, the present invention has been made in view of the above, and provides a compressor capable of effectively suppressing the oil rising phenomenon during operation at a high rotational speed, and an air conditioner including such a compressor. For the purpose.

In order to achieve the above object, a compressor according to the present invention includes a compression mechanism that has a rotor and a compression chamber that houses the rotor, and that rotates the rotor to compress the fluid sucked into the compression chamber, A drive unit that drives the compression mechanism unit, a housing that houses the compression mechanism unit and the drive unit, and that has a sump of lubricating oil supplied to the compression mechanism unit, and drives the space in the housing A partition section that partitions the section side and the oil reservoir side;
It is characterized by including.

  In this compressor, since the partitioning part partitions the space in the housing into the driving part side and the oil reservoir side, the lubricating oil is not carried away to the driving part side even if the oil level of the lubricating oil rises. . As a result, since the lubricating oil is reliably held in the oil reservoir, there is an advantage that the oil rising phenomenon during operation at a high rotational speed is effectively suppressed.

  In the compressor according to the present invention, the compression mechanism portion has a twin rotor structure having a pair of the rotor and the compression chamber, and the partition portion also serves as a partition wall of the pair of compression chambers. ing.

  Moreover, in this compressor, the compression mechanism part has a twin rotor structure, and the partition part also serves as a partition of each compression chamber. Therefore, there is an advantage that the number of parts is reduced and the configuration is simplified as compared with the configuration in which the partition wall and the partition portion of each compression chamber are formed separately.

  Moreover, in the compressor concerning this invention, the said partition part has a hole used as a channel | path for lubricating oil to return from the said drive part side to the said oil sump side.

  Further, in this compressor, a hole is formed in the partition part, and this hole serves as a passage for the lubricating oil to return from the drive part side to the oil reservoir side. Thereby, there exists an advantage by which the lubricating oil in a drive part side is collect | recovered efficiently in an oil sump.

  In the compressor according to the present invention, a check valve that suppresses the backflow of the lubricating oil from the oil reservoir side is provided in the hole.

  In this compressor, since the check valve is installed in the hole of the partition part, the backflow of the lubricating oil from the oil reservoir side is suppressed. Thereby, there exists an advantage by which the lubricating oil in the drive part side is collect | recovered more efficiently in an oil reservoir.

  Moreover, the air conditioner concerning this invention contains the said compressor.

  In this air conditioner, since the above-described compressor is employed, the oil rising phenomenon of the compressor during operation at a high rotational speed is suppressed. As a result, the lubricating oil discharged from the compressor is reduced, the reliability of the compressor is improved, the heat exchange efficiency of the heat exchanger connected thereto is not hindered, and the system maintenance burden is reduced. There are advantages.

  According to the compressor according to the present invention, since the partition portion partitions the space in the housing into the drive portion side and the oil reservoir side, even if the oil level of the lubricant oil rises, the lubricant oil moves to the drive portion side. It is never taken away. As a result, since the lubricating oil is reliably held in the oil reservoir, there is an advantage that the oil rising phenomenon during operation at a high rotational speed is effectively suppressed.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements of the embodiments described below include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIGS. 1 and 2 are a longitudinal sectional view (FIG. 1) and a transverse sectional view (FIG. 2) showing a compressor according to an embodiment of the present invention. 3 and 4 are diagrams showing modifications of the compressor described in FIGS. 1 and 2.

  This compressor 1 is applied to an air conditioner, for example. Such an air conditioner includes, for example, an outdoor unit disposed outside and a plurality of indoor units disposed indoors, and a refrigerant is circulated between the outdoor unit and each indoor unit so as to be indoors and outdoors. What can perform indoor air-conditioning, heating, and air-conditioning by performing heat exchange is known. In such an air conditioner, the compressor 1 is disposed in the outdoor unit and has a function of sucking and compressing the refrigerant and supplying the refrigerant to each element of the outdoor unit and the indoor unit.

  The compressor 1 has a sealed structure and is connected to other components (components of an air conditioner such as an accumulator and a heat exchanger) via a suction pipe 24 and a discharge pipe 25 (see FIG. 1). ). The compressor 1 sucks the refrigerant into the inside from the suction pipe 24, compresses the refrigerant, and discharges the refrigerant from the discharge pipe 25 to the outside. Thereby, the pressurized refrigerant circulates in the air conditioner. The compressor 1 includes a housing 2, a drive unit 3, a compression mechanism unit 4, an oil separation unit 5, and a partition unit 7.

  The housing 2 has a sealed structure in which an upper lid 22 and a bottom lid 23 are fitted into a substantially cylindrical body portion 21, and houses a drive unit 3, a compression mechanism unit 4, and the like therein. The casing 2 is arranged with its longitudinal direction standing vertically, a suction pipe 24 is installed on the lower side surface thereof, and a discharge pipe 25 is installed on its upper lid 22. Thereby, in the compressor 1, the refrigerant | coolant is comprised so that the inside of the housing | casing 2 may flow upwards from the perpendicular downward direction. Further, the bottom of the housing 2 is an oil reservoir, and lubricating oil supplied to the compression mechanism unit 4 is stored in the oil reservoir. In the compressor 1, as the definition of the direction, the upper lid 22 side of the housing 2 is referred to as the upper side, and the bottom lid 23 side is referred to as the lower side.

  The drive unit 3 is a slot motor and includes a stator 31, a rotor 32, and a shaft 33. The drive unit 3 is fixed to the inner wall surface of the housing 2 by a stator 31 and is installed with the shaft 33 facing vertically downward (see FIG. 1). In addition, a gap serving as a refrigerant flow path is provided between the stator 31 and the inner wall surface of the housing 2. The lower end of the shaft 33 is supported by a bearing 34 disposed in the compression mechanism unit 4. The drive unit 3 is supplied with power from the outside of the housing 2 via wiring.

  The compression mechanism unit 4 is disposed below the drive unit 3 in the housing 2, and includes a rotor 41, a compression chamber (cylinder) 42 that accommodates the rotor 41, and elements (FIG. 1). reference). The compression mechanism section 4 has a twin rotor structure, and a pair of rotors 41a and 41b and corresponding compression chambers 42a and 42b are disposed adjacent to the axial direction of the shaft 33 (up and down in the vertical direction). Yes. The compression mechanism unit 4 is coupled to the shaft 33 of the drive unit 3, and power is transmitted from the drive unit 3 via the shaft 33. In the compression mechanism section 4, the rotation of the shaft 33 causes the rotors 41a and 41b to move eccentrically, and the refrigerant in the compression chambers 42a and 42b is compressed. Then, the compressed refrigerant is sent out into the housing 2 from the discharge hole in the bearing 34 installed so as to communicate with the compression chamber 42a or 42b.

  The oil separation part 5 is a columnar member having a substantially disk-shaped plate part, and is fixedly installed above the drive part 3 (on the discharge pipe 25 side). The oil separating portion 5 has a diameter slightly smaller than the inner diameter of the housing 2, and a gap is formed between the outer periphery of the plate portion and the inner wall surface of the housing 2 in the installed state. It is comprised so that. The gap serves as a refrigerant flow path from the compression mechanism 4 to the discharge pipe 25.

  The partition portion 7 is a plate member having a substantially disk shape, and is disposed in the middle between the drive portion 3 and the oil sump (the bottom lid 23 of the housing 2) and has a function of partitioning the space in the housing 2. The partition 7 also serves as a partition wall for the compression chambers 42 a and 42 b of the compression mechanism 4. Specifically, the partition portion 7 is installed such that the flat portion is sandwiched between the compression chambers 42 a and 42 b and the peripheral portion is in contact with the inner wall surface of the housing 2. Thereby, the partition part 7 partitions the space in the housing | casing 2 up and down with the compression mechanism part 4. As shown in FIG. That is, the partition 7 partitions the space on the drive unit 3 side and the space on the oil reservoir side in the housing 2. Moreover, the partition part 7 is fastened to the inner wall surface of the housing 2 by welding or the like on its peripheral surface.

  In the compressor 1, the refrigerant is sucked into the housing 2 from the suction pipe 24 and supplied to the compression chambers 42 a and 42 b of the compression mechanism unit 4. When the shaft 33 is rotationally driven by the drive unit 3, the rotors 41a and 41b move eccentrically, and the refrigerant in the compression chambers 42a and 42b is compressed. The casing 2 is connected to the casing 2 through a discharge hole in the bearing 34 installed so that the compressed refrigerant communicates with the compression chambers 42a and 42b and the compressed refrigerant communicates with the compression chambers 42a and 42b from the compression chambers 42a and 42b. Sent in. Here, lubricating oil is supplied to the compression mechanism unit 4 from the oil reservoir at the bottom of the housing 2 during operation. The lubricating oil rises from the lower end portion of the shaft 33 through the flow path in the shaft 33 due to the centrifugal force generated by the rotation of the shaft 33, and is supplied into the compression chambers 42 a and 42 b of the compression mechanism portion 4. The supplied lubricating oil lubricates the compression mechanism portion 4 and then is discharged into the housing 2 through the discharge hole provided in the bearing 34 and the flow path in the shaft 33. The refrigerant containing the lubricating oil flows in the housing 2 through a gap between the driving unit 3 (stator 31) and the inner wall surface of the housing 2, and the plate of the oil separation unit 5 is located above the driving unit 3. To the department. Then, since the plate portion rotates together with the rotor 32, when the refrigerant collides with the plate portion, the lubricating oil is centrifuged from the refrigerant. Thereby, the refrigerant with reduced oil content is discharged to the outside of the housing 2 through the discharge pipe 25. The lubricating oil separated from the refrigerant travels down the wall surface of the housing 2 and falls downward due to its own weight, and returns to the oil reservoir in the housing 2.

  Further, in this compressor 1, since the bottom lid 23 of the casing 2 has a substantially dome shape, when the lubricating oil is agitated during operation at a high rotational speed, the oil level of the lubricating oil is changed to the bottom lid 23 of the casing 2. Ascend along the wall. On the other hand, in this compressor 1, since the partition part 7 partitions the space in the housing 2 into the drive part 3 side and the oil reservoir side, even if the oil level of the lubricating oil rises, the lubricating oil Is not carried away to the drive unit 3 side. As a result, since the lubricating oil is reliably held in the oil reservoir, there is an advantage that the oil rising phenomenon during operation at a high rotational speed is effectively suppressed.

  In addition, since the lubricating oil is reliably held in the oil reservoir by the above action of the partitioning portion 7, there is a situation in which the lubricating oil is taken away from the gap between the stator 31 of the driving unit 3 and the inner wall surface of the housing 2. It is suppressed. Therefore, conventionally, the refrigerant compressed by the compression mechanism unit 4 is discharged into the housing 2, and the flow rate area of the stator 31 and the side surface of the housing 2 is increased to reduce the refrigerant flow velocity and lubricate. Although taking out of the oil to the outside of the compressor 1 is suppressed, in this compressor 1, the upper limit of the oil level is limited by the partition portion 7, so that the lubricating oil does not reach such a position. Therefore, it is not necessary to increase the flow path area, and since notch portions and holes provided for securing the flow path area in the stator 31 can be minimized, saturation of the magnetic flux density can be suppressed, The drive efficiency of the drive unit 3 is not deteriorated. Furthermore, conventionally, by taking a large space above the drive unit 3 in the housing 2, the refrigerant flow rate immediately before the discharge pipe 25 is reduced, and the take-out of the lubricating oil to the outside of the compressor 1 is suppressed. For the same reason, it is not necessary to make the space large, so that a compact compressor can be provided.

  Further, in this compressor 1, the compression mechanism portion 4 has a twin rotor structure, and the partition portion 7 also serves as the partition walls of the compression chambers 42 a and 42 b of the compression mechanism portion 4. Therefore, compared with a configuration in which the partition walls of the compression chambers 42a and 42b and the partition portion 7 are separately formed, there are advantages that the number of parts is reduced and the configuration is simplified.

[Partition hole]
Moreover, in this compressor 1, the some hole 71 is formed in the partition part 7 (refer FIG. 1 and FIG. 2). These holes 71 are arranged along the periphery of the partition portion 7 and are formed so as to penetrate the partition portion 7 in the thickness direction. These holes 71 serve as passages for the lubricating oil to return from the space on the drive unit 3 side to the oil reservoir in a state where the partition portion 7 is installed in the housing 2. In such a configuration, the lubricating oil separated from the refrigerant in the oil separation unit 5 flows down along the wall surface of the housing 2, and returns to the lower oil reservoir through the hole 71 of the partition unit 7. Thereby, there exists an advantage by which the lubricating oil in the housing | casing 2 is efficiently collect | recovered in an oil reservoir.

  Moreover, in the said structure, it is preferable that the passage area (opening dimension or diameter) of the hole 71 of the partition part 7 is as narrow as possible within the range which lubricating oil can pass. Thereby, there exists an advantage by which the backflow of the lubricating oil from the oil reservoir side is suppressed effectively. Moreover, in the housing | casing 2 at the time of steady operation, the space by the side of the drive part 3 normally becomes a high voltage | pressure than the space by the side of an oil sump. Therefore, by forming the hole 71 of the partition 7 with a necessary and sufficient passage area through which the lubricating oil can pass, there is an advantage that the backflow of the lubricating oil from the oil reservoir side is more effectively suppressed. Further, in this respect, the passage area of the hole 71 is a range in which the lubricating oil can pass while considering the pressure difference between the space on the drive unit 3 side and the space on the oil reservoir side in the casing 2 during the steady operation. It is preferable that the design is appropriately changed within a range obvious to those skilled in the art so as to have a narrower dimension.

  In the above configuration, the hole 71 of the partition 7 has a large opening area on the inlet side of the lubricating oil (the drive unit 3 side in the installed state of the partition 7. The upper side of the housing 2), and the outlet side (partition It is preferable that the opening area of the oil sump side in the installed state of the part 7 (the lower side of the housing 2) be narrowed. Thereby, there exists an advantage by which the backflow of the lubricating oil from the oil reservoir side is suppressed more effectively. The shape of the hole 71 includes a tapered shape in which the inlet side of the lubricating oil is widened.

  Moreover, in the said structure, the hole 71 of the partition part 7 may be formed helically with respect to the thickness direction of the partition part 7 (illustration omitted). Even with such a configuration, there is an advantage that the backflow of the lubricating oil from the oil reservoir side is more effectively suppressed.

  Moreover, in the said structure, although the hole 71 of the partition part 7 is formed along the circumference | surroundings of the partition part 7, not only this but arbitrary holes which exist in the cylinder 4, for example, the process reference hole 71, are these holes. 71 may be substituted (see FIG. 3). Such a configuration also has an advantage that a similar function can be obtained. In addition, there is an advantage that a step of newly forming the hole 71 in the partition portion 7 can be omitted. The machining reference hole 71 is a hole that serves as a reference when machining the cylinder inner diameter and the like, and is formed at an arbitrary position of the cylinder 4.

[Check valve]
Moreover, in the said structure, it is preferable that the check valve 72 is installed in the hole 71 of the partition part 7 (refer FIG. 4). The check valve 72 has a function of suppressing the backflow of the lubricating oil from the oil reservoir side to the drive unit 3 side in a state where the partition portion 7 is installed in the housing 2. Thereby, since the backflow of the lubricating oil from the oil reservoir side is suppressed, there is an advantage that the lubricating oil on the drive unit 3 side is recovered more efficiently in the oil reservoir. As the check valve 72, those known to those skilled in the art are employed.

[Relationship with air conditioners]
The compressor 1 is particularly preferably applied to an air conditioner. That is, according to the compressor 1, as described above, (1) the oil rising phenomenon during operation at a high rotational speed is effectively suppressed, so that the lubricating oil discharged from the compressor 1 is reduced. There is an advantage that the reliability of the compressor is improved and the heat exchange efficiency of the heat exchanger connected to the compressor is not hindered, and the maintenance burden on the system is reduced. (2) Since the drive efficiency of the drive unit 3 is improved and the compressor can be made compact, there is an advantage that the drive efficiency of the entire air conditioner is improved and the compactness is made possible.

  As described above, the compressor according to the present invention is useful in that the oil rising phenomenon at the time of operation at a high rotational speed can be effectively suppressed.

1 is a longitudinal sectional view showing a compressor according to an embodiment of the present invention. It is a cross-sectional view showing a compressor according to an embodiment of the present invention. It is a figure which shows the modification of the compressor described in FIG. 1 and FIG. It is a figure which shows the modification of the compressor described in FIG. 1 and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Housing | casing 21 Body part 22 Top cover 23 Bottom cover 24 Intake pipe 25 Discharge pipe 3 Drive part 31 Stator 32 Rotor 33 Shaft 34 Bearing 4 Compression mechanism part 41 Rotor 42 Compression chamber 5 Oil separation part 7 Partition part 71 Hole, machining reference hole 72 Check valve

Claims (5)

A compression mechanism for compressing fluid sucked into the compression chamber by rotating the rotor and having a rotor and a compression chamber for housing the rotor;
A drive unit for driving the compression mechanism unit;
A housing that houses the compression mechanism and the drive unit, and has a reservoir of lubricating oil supplied to the compression mechanism,
A partition that partitions the space in the housing into the drive unit side and the oil reservoir side;
The compressor characterized by including.   2. The compressor according to claim 1, wherein the compression mechanism portion has a twin rotor structure having a pair of the rotor and the compression chamber, and the partition portion also serves as a partition wall of the pair of compression chambers. .   The compressor according to claim 1, wherein the partition portion has a hole serving as a passage for the lubricating oil to return from the drive portion side to the oil reservoir side.   The compressor according to claim 3, wherein a check valve that suppresses backflow of lubricating oil from the oil reservoir side is installed in the hole.   The air conditioner containing the compressor as described in any one of Claims 1-4.

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