JP2011043138A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce generation of vibration and noise of a compressor by eliminating as much as possible such disadvatage that the electromagnetic vibration of an electric element is transmitted to a sealed vessel. <P>SOLUTION: This compressor 1 includes a scroll compression element (compression element) 10 stored in the sealed vessel 2, and the electric element 20 driving the compression element 10. The electric element 20 is provided with a stator 23 formed by laminating a plurality of electromagnetic steel plates and a rotor 25 fixed to a rotating shaft 22 driving the compression element 10 and rotated inside of the stator 23. The stator 23 is fixed to the sealed vessel through a spacer 60, and an area where the spacer 60 abuts on the sealed vessel is smaller than an area where the spacer abuts on the stator. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a compressor provided with a compression element and an electric element for driving the compression element in an airtight container.

  Conventionally, this kind of compressor is comprised by the cylindrical airtight container, the compression element accommodated in this airtight container, and an electrically driven element. The electric element includes a stator that is fixed to the inner surface of the hermetic container, and a rotor that is fixed to a rotary shaft that drives the compression element and is rotatably provided on the inner surface of the stator.

  The stator is composed of a laminated body in which annular electromagnetic steel sheets are laminated, and a stator coil wound around the tooth portion of the laminated body, and is welded in an annular shape along the inner peripheral surface of the space of the sealed container, or It is fixed by shrink fitting.

  In such a compressor, there has conventionally been a problem that electromagnetic vibration is transmitted to the sealed container by operation of the electric element, and unpleasant noise is generated. For this reason, soundproofing measures, such as thickening the plate | board thickness of an airtight container and covering the outer periphery of an airtight container with a soundproof material, were taken. Attempts have also been made to reduce the vibration itself transmitted to the sealed container (see, for example, Patent Document 1).

JP 2004-124781 A

  In Patent Document 1, a spacer is interposed between the stator of the electric element and the airtight container so that the vibration of the electric element is not directly transmitted to the airtight container. In this way, by arranging the spacer between the stator of the electric element and the sealed container, electromagnetic vibration of the electric element is transmitted to the sealed container via the spacer, so that the electric element and the sealed container are directly connected. Compared to those in contact with, there is an effect of suppressing vibration transmission, but it is not sufficient.

  The present invention has been made to solve the problems of the related art, and eliminates inconvenience that electromagnetic vibration of the electric element is transmitted to the sealed container as much as possible, thereby reducing the vibration and noise of the compressor. For the purpose.

  In order to solve the above problems, a compressor according to the present invention includes a compression element housed in a hermetically sealed container and an electric element that drives the compression element, and the electric element includes a plurality of electromagnetic steel plates. And a rotor that is fixed to a rotating shaft that drives the compression element and that rotates inside the stator. The stator is fixed to the hermetic container via a spacer. The area in contact with the sealed container is smaller than the area in contact with the stator.

  In the compressor according to the second aspect of the present invention, in the above invention, the compression element is located in the upper part of the sealed container, the electric element is located below the compression element, and the spacer is formed around the upper part of the surface on the sealed container side. It is provided with a notch.

  According to a third aspect of the present invention, there is provided a compressor according to the first aspect, wherein the compression element is located in the upper part of the sealed container, the electric element is located below the compression element, and the spacer is a lower part of the surface on the side of the sealed container. It is characterized by having a notch formed in the periphery.

  According to a fourth aspect of the present invention, there is provided a compressor according to the first aspect, wherein the compression element is located in the upper part of the sealed container, the electric element is located below the compression element, and the spacer is located at the center of the surface on the side of the sealed container. It is characterized by having a notch formed around the part.

  The invention of claim 5 is characterized in that, in each of the above inventions, the axial dimension of the rotation axis of the spacer is the same as the axial dimension of the rotation axis of the stator.

  According to a sixth aspect of the invention, in the invention according to any one of the first to fourth aspects, the axial dimension of the rotating shaft of the spacer is smaller than the axial dimension of the rotating shaft of the stator. And

  According to the present invention, in a compressor provided with a compression element housed in an airtight container and an electric element that drives the compression element, the electric element includes a stator formed by laminating a plurality of electromagnetic steel sheets, a compression element, It is fixed to the rotating shaft that drives the element, and has a rotor that rotates inside the stator. The stator is fixed to the sealed container via a spacer, and the area where this spacer abuts the sealed container is fixed. Since it is smaller than the area abutting on the child, the stator is held around the large area of the spacer to suppress the deformation of the stator and reduce the contact area of the spacer with the airtight container. Can be suppressed.

  As a result, it is possible to eliminate the inconvenience that electromagnetic vibration of the electric element is transmitted to the sealed container as much as possible, and to effectively reduce the vibration and noise of the compressor.

  In particular, according to the invention of claim 2, in the above invention, the compression element is located in the upper part of the sealed container, the electric element is located below the compression element, and the spacer is formed around the upper part of the surface on the side of the sealed container. In addition to the invention of claim 1, in addition to the invention of claim 1, the lubricating oil is wound up by the rotation of the rotor, even if the lubricating oil temporarily accumulates between the stator and the closed container. Inconvenience of being discharged.

  According to the invention of claim 3, in the invention of claim 1, the compression element is located in the upper part of the sealed container, the electric element is located below the compression element, and the spacer is located around the lower part of the surface on the side of the sealed container. Since the notch formed in is provided, the area where the spacer abuts against the hermetic container can be made smaller than the area abutted against the stator. As a result, the periphery of the stator is held by the large area of the spacer, and the deformation of the stator is suppressed, and the contact area of the spacer with the sealed container is reduced to suppress the transmission of vibration to the sealed container. Will be able to.

  According to the invention of claim 4, in the invention of claim 1, the compression element is located in the upper part in the sealed container, the electric element is located below the compression element, and the spacer is arranged around the center of the surface on the side of the sealed container. Since the formed notch is provided, in addition to the invention of claim 1, the upper and lower sides of the spacer can come into contact with the hermetic container to hold the stator more uniformly.

  According to the invention of claim 5, in the above inventions, the axial dimension of the rotating shaft of the spacer is the same as the axial dimension of the rotating shaft of the stator, so that the stator can be held more stably. Can do.

  According to the invention of claim 6, in the invention according to any one of claims 1 to 4, the dimension in the axial direction of the rotating shaft of the spacer is smaller than the dimension in the axial direction of the rotating shaft of the stator. Thus, vibration transmission to the sealed container can be further suppressed.

It is a vertical side view of the scroll compressor of one Example to which the present invention is applied. It is. It is AA sectional drawing of the scroll compressor of FIG. It is BB sectional drawing of the scroll compressor of FIG. It is a top view of the spacer of the scroll compressor of FIG. It is a vertical side view of the scroll compressor of other examples to which the present invention is applied. It is a top view of the spacer of the scroll compressor of FIG.

  The present invention has been made to avoid the inconvenience that electromagnetic vibrations of the electric elements of the compressor are transmitted to the sealed container to generate unpleasant noise. That is, according to the present invention, the vibration and noise are reduced by fixing the stator of the electric element to the sealed container via the spacer, and making the area in which the spacer contacts the sealed container smaller than the area in contact with the stator. That was realized. Hereinafter, embodiments of the present invention will be described in detail. The present invention can be applied to any compressor as long as it is a compressor in which a compression element and an electric element (motor) are housed in an airtight container. In this embodiment, the present invention is applied to a scroll compressor.

  FIG. 1 is a longitudinal side view of a compressor according to an embodiment to which the present invention is applied. The compressor 1 is an internal high-pressure scroll compressor, and constitutes a well-known refrigerant circuit connected to a condenser, a decompression device, and an evaporator (not shown). The scroll compressor 1 includes a vertical cylindrical sealed container 2 made of a steel plate, a scroll compression element 10 housed in an upper portion of the inner space of the sealed container 2 and driven by a rotary shaft 22, and the scroll compression element 10. It is comprised by the electric element 20 located below.

  The airtight container 2 has an oil reservoir 6 at the bottom, a container body 4 that houses the electric element 20 (motor) and the scroll compression element 10, and a generally bowl-like shape that is attached to close the upper opening of the container body 4. It is comprised from the end cap 4A and the substantially bowl-shaped bottom 4B attached so that the bottom part opening of this container main body 4 might be obstruct | occluded. In addition, a circular attachment hole (not shown) is formed in the container body 4 of the sealed container 2 between the electric element 20 and the scroll compression element 10, and a terminal for supplying electric power to the electric element 20 ( (Wiring is omitted) 8 is attached.

  An upper support frame 28 is provided in the sealed container 2, and the upper support frame 28 divides the sealed container 2 into a discharge chamber 42 and an electric element chamber 43. The discharge chamber 42 is formed on the end cap 4A side (upper side) of the upper support frame 28, and the electric element chamber 43 is formed on the bottom 4B side (lower side) of the upper support frame 28. Specifically, the discharge chamber 42 is formed between the scroll compression element 10 and the end cap 4A.

  In this case, a plurality of (four in the embodiment) pedestal portions 32 projecting toward the electric element 20 are formed on the peripheral portion of the upper support frame 28, and each pedestal portion 32 is sealed by the weld W. The container body 4 is fixed. A discharge pipe 50 made of a metal pipe is welded and fixed to the container body 4 (sealed container 2) at a position corresponding to a bearing portion 30 described later of the upper support frame 28. One end extends in the container body 4 by a predetermined size and opens into the electric element chamber 43 below the upper support frame 28. The other end of the discharge pipe 50 is connected to the inlet side of an external condenser (not shown).

  The scroll compression element 10 is composed of a fixed scroll 12 fixed to the upper support frame 28, and an orbiting scroll 14 for rotating the fixed scroll 12 without rotating as described later. A compression space 16 (compression chamber) is formed in a sealed space formed between the fixed scroll 12 and the orbiting scroll 14 in a state where the fixed scroll 12 and the orbiting scroll 14 are engaged with each other. The fixed scroll 12 extends in a vertical direction (downward) from the disk-shaped end plate 12A and the surface of the end scroll 12 on the side of the orbiting scroll 14 (lower side), and has an involute curve or a curve approximate thereto. The wrap 12B is formed, and has a discharge port 17 at the center and a suction port 18 at the outer periphery.

  A suction pipe 51 is connected to the suction port 18 from the vertical direction. The end cap 4 </ b> A corresponding to a position directly above the suction port 18 is vertically penetrated, and one end is opened at the suction port 18. The other end of the suction pipe 51 is connected to the outlet side of an external evaporator (not shown). With this configuration, the low-temperature and low-pressure refrigerant gas discharged from the evaporator passes through the suction pipe 51 in the compression space 16 on the outer peripheral side formed between the fixed scroll 12 and the orbiting scroll 14 from the suction port 18. Will be introduced.

  In addition, the inside of the discharge chamber 42 to which the discharge port 17 communicates is electrically driven through a communication passage 34 formed on the closed container 2 side (container body 4 side) that is the outer periphery of the scroll compression element 10 (fixed scroll 12). It communicates with the element chamber 43.

  The orbiting scroll 14 is formed with a disc-shaped end plate 14A, and a wrap 14B which is formed upright on the surface of the end plate 14A on the fixed scroll 12 side (upper side) and has substantially the same shape as the wrap 12B of the fixed scroll 12. The end plate 14A has a boss 29 that protrudes from a surface opposite to the surface (upper surface) on which the wrap 14B is formed and has a boss hole at the center. A bearing portion 30 that continuously extends downward is formed in the central portion of the upper support frame 28, and the upper portion of the rotating shaft 22 is supported by the bearing portion 30.

  An oil pump 76 is provided below the rotary shaft 22. The oil pump 76 sucks up the oil accumulated in the oil reservoir 6 formed in the inner bottom portion (bottom 4B) of the sealed container 2 by the rotation of the rotating shaft 22, and is formed in the rotating shaft 22 in the vertical direction in the oil pump (not shown). Through the passage, the scroll compressor 1 is supplied to a swinging portion (between the rotary shaft 22 and the bearing portion 30, between an eccentric shaft 22A and a boss 29 described later, between the swinging scroll 14 and the upper support frame 28, etc.).

  The electric element 20 is formed in a substantially annular shape, and has a stator 23 having an outer diameter smaller than the inner diameter of the container body 4 of the sealed container 2, and a small clearance on the inner surface of the stator 23. The rotor 25 is rotatably provided inside the rotor 23. The stator 23 includes a laminated body 23A in which a plurality of electromagnetic steel plates are laminated, and a stator coil 24 wound around the tooth portion. The rotor 25 is also formed of a laminated body 26 of electromagnetic steel sheets, like the stator 23.

  At the center of the rotor 25, a rotary shaft 22 for driving the scroll compression element 10 is fitted. And the lower part (bottom 4B of the rotor 25) of the rotating shaft 22 is pivotally supported by the lower support frame 52 used as a subbearing. The lower support frame 52 is fixed to the container body 4 of the sealed container 2 below the electric element 20 by welding W.

  An eccentric shaft (pin) 22A is provided at the top end of the rotary shaft 22 so that the shaft center of the rotary shaft 22 is deviated from the axis of the predetermined dimension. It is rotatably inserted into the boss hole. The fixed scroll 12 is fixed to the upper support frame 28 by a plurality of bolts (not shown), and the orbiting scroll 14 is supported on the upper support frame 28 by an Oldham mechanism 40 including an Oldham ring 41 and an Oldham key. Thus, the orbiting scroll 14 is configured to perform a turning motion without rotating with respect to the fixed scroll 12.

  In other words, the oscillating scroll 14 is fixed by the Oldham ring 41 by driving the boss 29 inserted eccentrically with respect to the axis of the rotating shaft 22 by the eccentric shaft 22A eccentric with respect to the axis of the rotating shaft 22. Revolve on a circular path so as not to rotate with respect to the scroll 12. Then, due to the revolution, the fixed scroll 12 and the orbiting scroll 14 are gradually compressed from the outside to the inside through the plurality of crescent-shaped compression spaces 16 formed between the wrap 12B and the wrap 14B, and become high-pressure gas. It is configured to be discharged from the discharge port 17 to the discharge chamber 42. As a result, the refrigerant gas is gradually compressed from the suction pipe 51 toward the compression space 16 to become high-pressure gas, and is discharged from the discharge port 17 to the discharge chamber 42.

  On the other hand, in FIG. 1, 60 is a spacer of the present invention. The spacer 60 is provided between the stator 23 constituting the electric element 20 and the inner surface of the container body 4 of the sealed container 2. That is, the stator 23 is configured to be fixed to the sealed container 2 (container body 4) through the spacer 60.

  Here, the spacer 60 will be described in detail with reference to FIGS. 2 is a view of only the container main body 4, the spacer 60, and the stator 23 of the scroll compressor 1 of FIG. 1 cut along the broken line AA, and FIG. 3 is a view of the container of the scroll compressor 1 of FIG. The figure which cut | disconnected only the main body 4, the spacer 60, and the stator 23 with the broken line BB, and was seen from the arrow direction, FIG. 4 has shown the figure which looked at the spacer 60 from the plane, respectively.

  The spacer 60 is formed by processing one steel plate into a cylindrical shape or processing one columnar metal member into a cylindrical shape. The dimension in the axial direction (vertical direction) of the rotating shaft 22 of the spacer 60 of this embodiment is smaller than the dimension in the axial direction (vertical direction) of the rotating shaft 22 of the stator 23 (FIG. 1). In addition, the spacer 60 of this embodiment is attached so that the upper end is positioned on substantially the same plane as the upper end of the stator 23. The inner diameter of the spacer 60 is formed to be slightly smaller than the outer diameter of the stator 23. For this reason, the spacer 60 is attached to the outer periphery of the stator 23 by shrink fitting. Further, the surface (inner peripheral surface) of the spacer 60 on the side of the stator 23 is not provided with any notches or irregularities. For this reason, the contact area between the spacer 60 and the stator 23 can be increased.

  As described above, by increasing the contact area between the spacer 60 and the stator 23, the periphery (outer periphery) of the stator 23 can be held with a large area of the spacer 60. With such a configuration, it becomes possible to suppress and hold the periphery of the stator 23 of the electric element 20 that generates electromagnetic vibration by operation with a large area, and to suppress deformation of the stator 23.

  By the way, in this invention, it is comprised so that the area which the spacer 60 contacts the container main body 4 of the airtight container 2 may become smaller than the area which contacts the stator 23. FIG. The spacer 60 of this embodiment is provided with a notch 65 around the upper part of the surface (outer peripheral surface) on the side of the sealed container 2, so that the area of the spacer 60 that contacts the container body 4 of the sealed container 2 contacts the stator 23. It is comprised so that it may become smaller than the area to perform. The notch 65 is formed over the entire circumference with a predetermined length dimension from the upper end on the surface (outer peripheral surface) of the spacer 60 on the closed container 2 side.

  Incidentally, 54 is an oil passage, and 55 is a positioning groove. Each oil passage 54 and each positioning groove 55 are formed on the outer peripheral surface of the spacer 60 in the axial direction (vertical direction) of the rotary shaft 22. In the embodiment, four oil passages 54 are formed on the outer peripheral surface of the spacer 60 at substantially equal intervals. Further, in this embodiment, two positioning grooves 55 are formed at positions that are located between the adjacent oil passages 54, 54 provided on the outer peripheral surface of the spacer 60 and are substantially opposed to each other.

  In the state where the spacer 60 is attached to the outer periphery of the stator 4, the diameter of the outer peripheral surface other than the upper portion where the notch 65 is formed, excluding the oil passage 51 and the groove 52, is the container body 4 of the sealed container 2. It is configured to be slightly larger than the inner diameter of. Therefore, the spacer 60 is fixed to the inside of the container body 4 of the sealed container 2 by shrink fitting. That is, in a state where the spacer 60 is fixed to the inner surface of the container body 4 of the sealed container 2, the surface of the spacer 60 that comes into contact with the inner peripheral surface of the sealed container 2 is hermetically sealed except for the entire upper periphery where the notch 65 is formed. It is the outer peripheral surface excluding the oil passage 51 and the groove 52 extending from the periphery of the central portion of the spacer 60 to the lower portion (outer peripheral surface) on the container 2 side.

  Thus, by forming the notch 65 around the upper portion of the surface (outer peripheral surface) of the spacer 60 on the side of the sealed container 2, the spacer 60 and the sealed container 2 are fixed when the spacer 60 and the sealed container 2 are fixed. In the upper part, as shown in FIG. 2, a gap is formed between the spacer 60 and the container body 4 of the sealed container 2. That is, the upper part of the spacer 60 in which the notch 65 is formed does not contact the inner peripheral surface of the sealed container 2 (container body 4), and accordingly, the surface of the spacer 60 on the sealed container 2 (container body 4) side ( The contact area between the outer peripheral surface) and the inner peripheral surface of the sealed container 2 (container body 4) can be reduced. For this reason, it becomes possible to reduce the vibration of the electric element 20 transmitted to the sealed container 2 through the spacer 60.

  Next, the operation of the scroll compressor 1 will be described. In the following description, it is assumed that a predetermined refrigerant is sealed in the refrigerant circuit and oil that is compatible with the refrigerant is sealed in advance. When the stator coil 24 of the electric element 20 is energized by power supply from the terminal 8 and the rotor 25 rotates, the rotational force is transmitted to the orbiting scroll 14 via the rotating shaft 22, and the orbiting scroll 14 revolves. To do.

  That is, the orbiting scroll 14 is driven by a boss 29 having a boss hole inserted in the eccentric shaft 22A of the rotary shaft 22 so as to be eccentric with respect to the axis of the rotary shaft 22, and the Oldham ring 41 is used for the fixed scroll 12. To revolve on a circular orbit so that it does not rotate.

  The fixed scroll 12 and the orbiting scroll 14 gradually reduce the compression space 16 formed between the wraps 12B and 14B from the outside toward the inside, thereby compressing the refrigerant. As a result, the low-temperature and low-pressure refrigerant gas introduced into the outer compression space 16 formed between the fixed scroll 12 and the orbiting scroll 14 from the suction port 18 through the suction pipe 51 is directed inward. It is gradually compressed into a high-temperature and high-pressure refrigerant gas.

  The compressed, high-temperature and high-pressure refrigerant gas is discharged from the discharge port 17 formed at the center of the fixed scroll 12 to the discharge chamber 42, and then the sealed container serving as the outer periphery of the scroll compression element 10 (fixed scroll 12). It is discharged into the electric element chamber 43 through the communication passage 34 formed on the second side (the container body 4 side).

  The refrigerant gas discharged into the electric element chamber 43 passes through a gap formed between the electric element 20 and the upper support frame 28, exits the electric element chamber 43, and is discharged from the discharge pipe 50 through the condenser and pressure reducing device. , Sequentially passing through the evaporator, returning from the suction pipe 51 to the scroll compressor 1, and the outer compression space 16 formed between the fixed scroll 12 and the swinging scroll 14 from the suction port 18 of the scroll compression element 10. Repeat the cycle of being sucked into.

  As described above in detail, according to the present invention, the area of the spacer 60 that is interposed between the stator 23 and the sealed container 2 is less than the area that is in contact with the stator 23. The periphery of the stator 23 is held by a large area of the spacer 60 to suppress the deformation of the stator 23 and reduce the contact area of the spacer 60 to the sealed container 2 to transmit vibration to the sealed container 2. Can be suppressed.

  Thereby, it is possible to eliminate the inconvenience that electromagnetic vibration of the electric element 20 is transmitted to the sealed container 2 as much as possible, and to further effectively reduce vibration and noise generation of the scroll compressor 1.

  In particular, in this embodiment, since the notch 65 is provided around the upper portion of the surface of the spacer 60 on the side of the sealed container 2, even if lubricating oil temporarily accumulates between the stator 23 and the sealed container 2, the oil level is low. Therefore, it is possible to suppress the inconvenience that the lubricating oil is wound up and discharged by the rotation of the rotor.

  Further, as in this embodiment, the axial dimension of the rotating shaft 22 of the spacer 60 is made smaller than the axial dimension of the rotating shaft 22 of the stator 23, thereby further transmitting vibration to the sealed container 2. As a result, noise can be further reduced.

  In the first embodiment, the notch 65 is provided around the upper portion of the spacer 60 on the side of the sealed container 2 so that the area of the spacer 60 that contacts the container body 4 of the sealed container 2 is larger than the area of the spacer 60 that contacts the stator 23. However, the present invention is not limited to this, and for example, as shown in FIG. 5, a notch 75 is provided around the lower portion of the surface of the spacer 70 on the side of the sealed container 2. Thus, the area of the spacer 70 that contacts the container main body 4 of the sealed container 2 may be configured to be smaller than the area that contacts the stator 23.

  The cutout 75 shown in FIG. 5 is formed over the entire circumference on the surface (outer peripheral surface) of the spacer 70 on the closed container 2 side, similarly to the cutout 65 of the first embodiment. In the first embodiment, the notch 65 has a predetermined length from the upper end and is formed over the entire circumference, whereas in the spacer 70 of this embodiment, the notch 75 has a predetermined length from the lower end. Other configurations are the same except that the dimensions are different. In FIG. 5, the same reference numerals as those in FIGS. 1 to 4 have the same or similar effects or actions, and thus the description thereof is omitted here.

  Even in the case where the notch 75 is provided around the lower portion of the surface of the spacer 70 on the side of the sealed container 2 as in the present embodiment, like the above embodiment, the spacer 70 is interposed between the stator 23 and the sealed container 2. The area of the spacer 70 that contacts the sealed container 2 can be made smaller than the area that contacts the stator 23. Accordingly, the periphery of the stator 23 is held by a large area of the spacer 70 to suppress the deformation of the stator 23 and reduce the contact area of the spacer 70 to the sealed container 2 to reduce vibrations to the sealed container 2. Transmission can be suppressed.

  As a result, it is possible to eliminate the inconvenience that the electromagnetic vibration of the electric element 20 is transmitted to the sealed container 2 as much as in the above embodiment, and to further effectively reduce the vibration and noise generation of the scroll compressor 1. Become.

  In addition to the above-described embodiments, for example, by providing a notch around the central portion of the surface of the spacer on the side of the sealed container 2, the area that contacts the container body 4 of the sealed container 2 of the spacer can be increased in the stator 23. The present invention is effective even if configured to be smaller than the contact area. Further, in each of the above embodiments, the spacer is provided at a position where the upper end of the spacer and the upper end of the stator 23 are substantially the same, but the spacer is positioned at the outer peripheral surface of the stator 23 and the container body 4 of the sealed container 2. The spacer may be provided at a position where the lower end of the spacer and the lower end of the stator 23 are substantially the same, or the spacer may be provided below the upper end of the stator 23. It may be arranged such that the upper end is positioned and the lower end of the spacer is positioned above the lower end of the stator 23.

  Further, in each of the above embodiments, the axial dimension of the rotating shaft 22 of the spacer is formed smaller than the axial dimension of the rotating shaft 22 of the stator 23. However, the present invention is not limited to this, as in the third embodiment to be described later. In addition, the present invention is effective even if the axial dimension of the rotating shaft 22 of the spacer is the same as the axial dimension of the rotating shaft 22 of the stator 23.

  FIG. 6 is a longitudinal side view of a scroll compressor according to another embodiment to which the present invention is applied. In FIG. 6, the same reference numerals as those in FIGS. 1 to 5 have the same or similar effects or actions, and thus the description thereof is omitted here. Reference numeral 80 shown in FIG. 6 denotes a spacer of this embodiment. The dimension in the axial direction of the rotating shaft 22 of the spacer 80 is the same as the dimension in the axial direction of the rotating shaft 22 of the stator 23. That is, the upper end of the stator 23 and the upper end of the spacer 80 are located on the substantially same plane, and the lower end of the stator 23 and the lower end of the spacer 80 are located on the substantially same plane.

  Further, the inner peripheral surface (surface on the side of the stator 23) of the spacer 80 is not provided with any notches or irregularities as in the above embodiments. Therefore, the contact area between the spacer 80 and the stator 23 can be increased. In particular, in this embodiment, since the axial dimension of the rotating shaft 22 of the spacer 80 is the same as the axial dimension of the rotating shaft 22 of the stator 23, the entire outer periphery (surrounding) of the stator 23 is substantially the same. It can be held by the surface of the spacer 80 that contacts the stator 23 side.

  With such a configuration, it is possible to more stably hold the periphery of the stator 23 of the electric element 20 that generates electromagnetic vibration during operation with the spacer 80. Thereby, deformation of the stator 23 can be further suppressed.

  Further, the spacer 80 of the present embodiment includes a notch 85 around the central portion of the surface (outer peripheral surface) on the closed container 2 side, so that the surface of the spacer 80 that contacts the container main body 4 of the closed container 2 is fixed to the stator. 23 is configured to be smaller than the surface in contact with 23. The notch 85 is formed on the surface (outer peripheral surface) of the spacer 80 on the side of the sealed container 2 with a predetermined length dimension at a substantially central portion in the axial direction (vertical direction) of the rotary shaft 22 over the entire circumference. Yes.

  Thus, by forming the notch 85 on the surface of the spacer 80 on the side of the sealed container 2 (container body 4), when the spacer 80 and the sealed container 2 are fixed, the sealed container 2 of the spacer 80 (container body 4). ) Side surface (outer peripheral surface) and the contact area between the inner peripheral surface of the sealed container 2 (container body 4) can be reduced. For this reason, it becomes possible to reduce the vibration of the electric element 20 transmitted to the sealed container 2 through the spacer 80.

  In particular, as in this embodiment, a notch is formed around the central portion of the surface (outer peripheral surface) of the spacer 80 on the side of the sealed container 2 (container main body 4), so that the upper and lower sides of the spacer 80 can be 4) can be brought into contact. Thereby, the stator 23 can be held more uniformly.

  In each of the above embodiments, the present invention is applied to the internal high pressure type scroll compressor. However, the present invention is not limited to the scroll compressor of the embodiment, and for example, the present invention is applied to a rotary compressor. The present invention may be applied to an internal low pressure type or internal intermediate pressure type compressor.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Sealed container 4 Container body 4A End cap 4B Bottom 6 Oil reservoir 8 Terminal 10 Scroll compression element 12 Fixed scroll 12A End plate 12B Wrap 14 Swing scroll 14A End plate 14B Wrap 16 Compression space 17 Discharge port 18 Suction port 20 Electric motor Element 22 Rotating shaft 22A Eccentric part 23 Stator 24 Stator coil 25 Rotor 42 Discharge chamber 43 Electric element chamber 50 Discharge pipe 51 Suction pipe 60, 70, 80 Spacer 65, 75, 85 Notch

Claims (6)

In a compressor provided with a compression element housed in a closed container and an electric element for driving the compression element,
The electric element includes a stator formed by laminating a plurality of electromagnetic steel plates, and a rotor that is fixed to a rotary shaft that drives the compression element and rotates inside the stator,
The compressor is fixed to the sealed container via a spacer, and an area where the spacer contacts the sealed container is smaller than an area contacted with the stator. The compression element is located in the upper part of the sealed container, and the electric element is located below the compression element,
The compressor according to claim 1, wherein the spacer includes a notch formed around an upper portion of the surface on the closed container side. The compression element is located in the upper part of the sealed container, and the electric element is located below the compression element,
The compressor according to claim 1, wherein the spacer includes a notch formed around a lower portion of a surface on the airtight container side. The compression element is located in the upper part of the sealed container, and the electric element is located below the compression element,
The compressor according to claim 1, wherein the spacer includes a notch formed around a central portion of the surface on the closed container side.   5. The compression according to claim 1, wherein an axial dimension of the rotating shaft of the spacer is the same as an axial dimension of the rotating shaft of the stator. 6. Machine.   The compressor according to any one of claims 1 to 4, wherein a dimension of the spacer in the axial direction of the rotating shaft is smaller than a dimension of the stator in the axial direction of the rotating shaft.

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