JP2007085254A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the generation of the vibration and uncomfortable noise of a compressor by minimizing inconvenience transmitted to a hermetic container by the electromagnetic vibration of a motor-driven element. <P>SOLUTION: In this rotary compressor (compressor) 10, a rotary compressive mechanism 18 formed of a first rotary compressive element 32 and a second rotary compressive element 34 as a motor-driven element 14 and a compressive element driven by the motor-driven element 14 is stored in the hermetic container 12. A damping material 15 is interposed between the outer peripheral surface of the stator 22 of the motor-driven element 14 and the inner peripheral surface of the container body 12A of the hermetic container 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a compressor in which an electric element and a compression element driven by the electric element are housed in an airtight container.

  Conventionally, in this type of compressor, for example, a hermetic rotary compressor, an electric element and a rotary compression element driven by the electric element are housed in a hermetic container. The electric element is composed of a stator that is welded and fixed in an annular shape along the inner peripheral surface of the hermetic container, and a rotor that is inserted and installed inside the stator at a slight interval. The rotor passes through the center. Fixed to a rotating shaft extending in the vertical direction.

In such a compressor, there has been a problem that electromagnetic vibration is transmitted to the sealed container by the operation of the electric element, and is transmitted to the peripheral devices of the sealed container, resulting in unpleasant noise. For this reason, the outer periphery of the airtight container is covered with a soundproof material, or a weight is attached to the outside of the airtight container to reduce such vibration (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 2001-342953

  As described above, by covering the outer periphery of the sealed container with a soundproof material or attaching a weight to the outside of the sealed container, it is possible to avoid the inconvenience that vibrations are transmitted to the peripheral devices of the compressor as much as possible. However, unpleasant noise caused by transmission of electromagnetic vibration of the electric element to the sealed container could not be suppressed.

  The present invention has been made to solve the conventional technical problem, 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. The purpose is to do.

  The compressor of the present invention comprises an electric element and a compression element driven by the electric element in a sealed container, and a vibration damping material is interposed between the electric element and the sealed container. is there.

  According to a second aspect of the present invention, in the above-described invention, the electric element is held on the inner surface of the sealed container by the damping material.

  According to the compressor of the present invention, since the vibration damping material is interposed between the electric element and the sealed container, the electromagnetic vibration of the electric element is hardly transmitted to the sealed container by the vibration damping material. Thereby, the vibration and noise of the whole compressor can be suppressed.

  Further, if the electric element is held on the inner surface of the sealed container by the damping material as in claim 2, the electric element can be attached to the sealed container without welding. Thereby, since the electric element and the sealed container do not contact at all, the electromagnetic vibration directly transmitted from the electric element to the sealed container can be completely prevented, and a further damping effect can be obtained.

  The present invention is characterized by reducing the generation of unpleasant noise and vibration of the compressor. The object of suppressing electromagnetic vibration transmitted from the electric element to the sealed container is realized by providing a vibration damping material between the electric element and the sealed container. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a longitudinal side view of a multi-stage compression rotary compressor 10 having first and second rotary compression elements 32 and 34 as an embodiment of the compressor of the present invention, and FIG. 2 is a rotary compressor 10 of FIG. The plane sectional view of each electric element 14 is shown. In FIG. 1, a rotary compressor 10 of this embodiment is an internal intermediate type rotary compressor, and an electric element 14 arranged in an upper side of the internal space of the hermetic container 12 in a vertical cylindrical hermetic container 12 made of a steel plate. And the rotary compression mechanism portion 18 including the first and second rotary compression elements 32 and 34 as the compression elements disposed below the electric element 14 and driven by the rotary shaft 16 of the electric element 14. ing.

  The sealed container 12 has an oil reservoir at the bottom, a container body 12A that houses the electric element 14 and the rotary compression mechanism 18, and a generally bowl-shaped end cap (lid body) 12B that closes the upper opening of the container body 12A. A circular mounting hole 12D is formed on the upper surface of the end cap 12B, and a terminal (wiring is omitted) 20 for supplying power to the electric element 14 is mounted in the mounting hole 12D. ing.

  The electric element 14 includes a stator 22 and a rotor 24 that is inserted and installed inside the stator 22 with a slight gap. The rotor 24 is fixed to a rotary shaft 16 that extends in the vertical direction through the center. Has been.

  The stator 22 includes a laminated body 26 in which donut-shaped electromagnetic steel plates are laminated, and a stator coil 28 wound around the teeth of the laminated body 26 by a direct winding (concentrated winding) method. Similarly to the stator 22, the rotor 24 is also formed of a laminated body 30 of electromagnetic steel sheets and a magnet MG inserted into the laminated body 30. In FIG. 2, reference numeral 25 </ b> A denotes a rivet 25 for fixing a non-magnetic plate-like end face member 29 (lower end face member not shown), a balance weight 31, and an oil separation plate 33 to the end face of the laminate 30. , 35 is a caulking portion of the electrical steel sheet constituting the laminate 30, and 37 is a hole constituting the oil passage.

  Here, in the rotary compressor 10 of the present embodiment, a damping material 15 is interposed between the electric element 14 and the sealed container 12. That is, the damping material 15 is interposed over the entire circumference between the outer peripheral surface of the stator 22 of the electric element 14 and the inner peripheral surface (inner wall) of the container body 12A.

  As the damping material 15, it is suitable to use a material having high heat resistance, for example, LCP resin, PBT resin or the like. In this embodiment, LCP resin is used as the damping material 15. LCP resin is a liquid crystal polymer with high heat resistance and is also used as an insulating material for electric elements.

  And in order to fix the electrically-driven element 14 in the airtight container 12, first, the damping material 15 was arrange | positioned cyclically | annularly over the perimeter along the inner peripheral surface of the upper space in which the electrically-driven element 14 of the container main body 12A is located. Thereafter, the electric element 14 is inserted inside the vibration damping material 15. As a result, the outer peripheral surface of the stator 22 of the electric element 14 comes into contact with the vibration damping material 15. In this state, the container body 12A, the vibration damping material 15, and the stator 22 of the electric element 14 are placed at several locations (in this embodiment, three locations indicated by S1, S2, and S3 in FIG. 2) from the outer wall of the container body 12A. ) Spot welded and fixed together. Thereby, the stator 22 of the electric element 14 can be fixed to the sealed container 12 via the vibration damping material 15.

  Thus, by providing the vibration damping material 15 between the electric element 14 and the sealed container 12, it is difficult for electromagnetic vibration of the electric element 14 generated by the operation of the rotary compressor 10 to be transmitted to the sealed container 12. Conventionally, since the stator of the electric element is directly welded and fixed along the inner peripheral surface of the sealed container, the electromagnetic vibration generated by driving the electric element 14 is directly transmitted to the sealed container 12, and unpleasant noise is generated. The vibration transmitted to the hermetic container 12 is transmitted to devices around the rotary compressor 10 and the vibration and noise increase.

  However, by providing the vibration damping material 15 between the electric element 14 and the sealed container 12 as in the present invention, the electromagnetic vibration transmitted from the electric element 14 to the sealed container 12 can be effectively suppressed. Thereby, the vibration and noise of the entire rotary compressor 10 can be reduced.

  On the other hand, the rotary compression mechanism section 18 has the second rotary compression element 34, which is the second stage, interposed between the intermediate partition plate 36 and the first rotation, which is the first stage, on the electric element 14 side in the sealed container 12. The compression element 32 is arranged on the side opposite to the electric element 14. That is, the first rotary compression element 32 and the second rotary compression element 34 are arranged above and below the intermediate partition plate 36, and the upper and lower cylinders 38, 40 and the first and second rotary compression elements 32, 34, and Rollers 46 and 48 that are fitted to upper and lower eccentric portions 42 and 44 formed on the rotating shaft 16 of the electric element 14 and eccentrically rotate in the cylinders 38 and 40, and abut against the rollers 46 and 48 and the cylinders 38. , 40 are divided into a low pressure chamber side and a high pressure chamber side, respectively, springs 85 and 86 as spring members for constantly biasing the vanes 50 and 52 toward the rollers 46 and 48, and a lower cylinder While closing one (lower side) opening of 40, the lower support member 56 as a support member having the bearing 56 </ b> A of the rotating shaft 16 and the upper opening of the upper cylinder 38 are closed, and the shaft of the rotating shaft 16 is Constituted by the upper support member 54 having only 54A. The upper and lower eccentric parts 42 and 44 are provided on the rotary shaft 16 with a phase difference of 180 degrees.

  The upper support member 54 and the lower support member 56 include a suction passage 60 that communicates with the inside of the upper and lower cylinders 38 and 40 via a suction port (not shown) (the upper suction passage is not shown), The discharge silencing chamber 62 formed by recessing the surface opposite to the cylinder 38 (upper side) and closing the recessed portion with the upper cover 63 and the lower cylinder 40 on the opposite side of the lower support member 56 ( A discharge silencer chamber 64 formed by recessing the lower surface and closing the recess with the lower cover 68 is provided. That is, the discharge silence chamber 62 is closed by the upper cover 63 and the discharge silence chamber 64 is closed by the lower cover 68.

  The lower cover 68 is composed of a donut-shaped circular steel plate, and is fixed to the lower support member 56 from below with lower bolts 80 at the peripheral portions, and the first rotary compression element 32 is fixed at the discharge port. The lower surface opening of the discharge silencing chamber 64 communicating with the inside of the lower cylinder 40 is closed. The ends of the bolts 80 are screwed into the upper support member 54.

  The discharge silencer chamber 64 of the first rotary compression element 32 and the inside of the sealed container 12 are communicated with each other through a communication path. This communication path is a hole (not shown) that passes through the upper cover 63, the upper support member 54, the upper and lower cylinders 38 and 40, and the intermediate partition plate 36. In this case, an intermediate discharge pipe 121 is erected at the upper end of the communication path, and an intermediate pressure refrigerant is discharged from the intermediate discharge pipe 121 into the sealed container 12.

  Further, on the side surface of the container main body 12A of the sealed container 12, the suction passage 60 (upper side is not shown) of the upper support member 54 and the lower support member 56, the discharge silencing chamber 62, the upper side of the upper cover 63 (of the electric element 14). Sleeves 141, 142, 143, and 144 are welded and fixed at positions corresponding to the positions substantially corresponding to the lower ends. The sleeves 141 and 142 are adjacent to each other vertically, and the sleeve 143 is substantially diagonal to the sleeve 141. Further, the sleeve 144 is located at a position shifted by approximately 90 degrees from the sleeve 141.

  One end of a refrigerant introduction pipe 92 for introducing refrigerant gas into the upper cylinder 38 is inserted and connected into the sleeve 141, and one end of the refrigerant introduction pipe 92 communicates with a suction passage (not shown) of the upper cylinder 38. The refrigerant introduction pipe 92 passes through the upper side of the sealed container 12 to reach the sleeve 144, and the other end is inserted and connected into the sleeve 144 to communicate with the sealed container 12.

  One end of a refrigerant introduction pipe 94 for introducing refrigerant gas into the lower cylinder 40 is inserted into and connected to the sleeve 142, and one end of the refrigerant introduction pipe 94 communicates with the suction passage 60 of the lower cylinder 40. Further, a refrigerant discharge pipe 96 is inserted and connected into the sleeve 143, and one end of the refrigerant introduction pipe 96 communicates with the discharge silencer chamber 62.

  Next, the operation of the rotary compressor with the above configuration will be described. When the stator coil 28 of the electric element 14 is energized through the terminal 20 and a wiring (not shown), the electric element 14 is activated and the rotor 24 rotates. By this rotation, the rollers 46 and 48 fitted to the upper and lower eccentric portions 42 and 44 provided integrally with the rotary shaft 16 eccentrically rotate in the upper and lower cylinders 38 and 40.

  As a result, the low-pressure refrigerant gas sucked into the lower cylinder 40 from the suction port (not shown) to the low-pressure chamber side via the suction passage 60 formed in the refrigerant introduction pipe 94 and the lower support member 56 is transferred to the roller 48 and the vane 52. Is compressed to an intermediate pressure, and discharged from the high pressure chamber side of the lower cylinder 40 into the discharge silencer chamber 64 via a discharge port (not shown). The intermediate-pressure refrigerant gas discharged into the discharge silencer chamber 64 is discharged into the sealed container 12 from the intermediate discharge pipe 121 through a communication hole (not shown).

  The intermediate-pressure refrigerant gas in the sealed container 12 passes through the refrigerant introduction pipe 92 and is sucked from the suction port to the low pressure chamber side of the upper cylinder 38 through a suction passage (not shown) formed in the upper support member 54. Is done. The suctioned intermediate-pressure refrigerant gas is compressed in the second stage by the operation of the upper roller 46 and the upper vane 50 to become a high-temperature / high-pressure refrigerant gas, and a discharge port (not shown) from the high-pressure chamber side of the upper cylinder 38. It passes through the inside and is discharged into a discharge silencer chamber 62 formed in the upper support member 54. The refrigerant discharged into the discharge silencing chamber 62 is discharged to the outside of the rotary compressor 10 through the refrigerant discharge pipe 96 communicated with the discharge silencing chamber 62.

  In the first embodiment, the electric element 14, the damping material 15, and the container body 12A of the sealed container 12 are spot-welded at several places (three places S1, S2, S3), and these are fixed integrally. did. Even in such a configuration, it is difficult for electromagnetic vibration of the electric element 14 to be transmitted to the sealed container 12 and transmission of vibration and generation of noise can be reduced. Vibration may be transmitted to the sealed container 12.

  Therefore, in the present embodiment, a compressor that holds the electric element 14 on the inner surface of the hermetic container 12 only by the vibration damping material 15 without fixing the electric element 14 to the hermetic container 12 by spot welding as in the above-described embodiment is illustrated. 3 will be described. FIG. 3 shows a plan cross-sectional view of the electric element of the compressor of this embodiment. In this embodiment, the compressor uses a rotary compressor as in the above embodiment.

  As shown in FIG. 3, the rotary compressor of the present embodiment holds the electric element 14 on the inner surface of the hermetic container 12 only by the damping material 15 without welding the electric element 14 to the hermetic container 12. That is, in the electric element 14 of the present embodiment, the vibration damping material 15 is annularly arranged over the entire circumference along the inner circumferential surface of the upper space where the electric element 14 of the container body 12A is located, and then the vibration damping material 15 It is fixed only by inserting the electric element 14 inside.

  In this way, by holding the electric element 14 on the inner surface of the sealed container 12 only by the vibration damping material 15, the electric element 14 and the sealed container 12 do not come into contact at all, so that the electric element 14 is directly transmitted to the sealed container 12. Electromagnetic vibration can be completely prevented. As a result, a further vibration damping effect can be obtained, and the inconvenience that the electromagnetic vibration of the electric element 14 is transmitted to the sealed container 12 can be suppressed or eliminated.

  In the second embodiment, the electric element 14 is held only by the vibration damping material 15. However, in such a configuration, when there is a possibility that the stator 22 moves due to the rotation of the rotor 24, for example, the rotation is performed. A fixing leg for stopping the rotation of the stator 22 may be attached to the upper support member 54 or the upper cover 63 of the compression mechanism unit 18. That is, the stator 22 may be held by attaching a plurality of fixed legs standing upward to the upper support member 54 or the upper cover 63 and attaching these fixed legs to the lower part of the stator 22.

  Even in such a configuration, since the electric element 14 can be fixed without directly contacting the sealed container 12, electromagnetic vibration directly transmitted from the electric element 14 to the sealed container 12 can be prevented, and the vibration of the rotary compressor 10 and Noise can be reduced.

  In each of the embodiments, the multistage compression rotary compressor 10 having the first and second rotary compression elements 32 and 34 as a compressor has been described. However, the present invention provides an electric element in an airtight container and the electric element. Any compressor with a driven compression element is applicable. For example, the present invention can be applied to a reciprocating compressor, a scroll compressor, or the like as a compressor. Further, the present invention may be applied to a horizontal type compressor. Furthermore, it goes without saying that a single-stage compressor or a compressor having three or more compression elements is also effective.

It is a vertical side view of the compressor of one Example of this invention. Example 1 It is a plane sectional view of the electric element of the compressor of FIG. It is a plane sectional view of the electric element of the compressor of other examples of the present invention. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotary compressor 12 Airtight container 12A Container main body 14 Electric element 15 Damping material 16 Rotating shaft 18 Rotation compression mechanism part 20 Terminal 22 Stator 24 Rotor 28 Stator coil 32 1st rotation compression element 34 2nd rotation compression element

Claims (2)

In a compressor in which an electric element and a compression element driven by the electric element are housed in a sealed container,
A compressor comprising a vibration damping material interposed between the electric element and the sealed container.   The compressor according to claim 1, wherein the electric element is held on the inner surface of the sealed container by the vibration damping material.

Images