JP2006118421A - Hermetic rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provided a hermetic rotary compressor materializing reduction of discharging speed of compressed refrigerant, reduction of compressor noise, prevention of over compression and reduction of fuel consumption. <P>SOLUTION: A plurality of delivery holes are provided on a flat surface part of a bearing. Consequently, speed of compressed refrigerant flow discharged from a compression chamber is reduced, to reduce discharge noise, prevent over compression and reduce electric power consumption and electric power consumption is reduced by changing area of each delivery holes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hermetic rotary compressor used in devices such as air conditioning, refrigeration, and refrigeration, and to a hermetic rotary compressor that operates with low noise.

  As a hermetic rotary compressor of the prior art, a large discharge noise is generated when the compressed refrigerant is discharged from the compression mechanism section, which is a main factor of compressor noise (for example, see Patent Document 1). .

  FIG. 7 shows a conventional hermetic rotary compressor described in Patent Document 1. In FIG. In FIG. 7, an electric motor unit 602 and a compression mechanism unit 603 driven by the electric motor unit 602 are installed inside the sealed container 601. The compression mechanism 603 includes a crankshaft 605 having an eccentric part 604 for transmitting the rotational force of the electric motor part 602 to the compression mechanism part 603, a piston 606 that is rotatably fitted to the eccentric part 604, and A cylinder 607 having a cylindrical air chamber, a vane 609 slidably fitted in a vane groove 608 provided in the cylinder 607, and a spring for pressing the vane 609 against the piston 606 (see FIG. (Not shown), a main bearing 610 provided at one end in the axial direction of the cylinder 607, having a bearing portion for holding the crankshaft 605 and having a flat portion closing the one end in the axial direction of the cylinder 607, and the axial direction of the cylinder 607, etc. And a secondary bearing 611 having a flat portion installed at the end and closing the cylinder 607.

  A discharge hole 612 for discharging the compressed refrigerant generated in the compression chamber composed of the cylinder 607, the piston 606, the vane 609, the main bearing 610, and the sub-bearing 611 into the sealed container 601 is formed in the flat portion of the bearing 610 or 611. And a valve 613 that closes the discharge hole 612 and prevents backflow of the compressed refrigerant to the compression chamber.

The compression mechanism section 603 is fixed to the inside of the sealed container 601 at the outer periphery of the main bearing 610 or the cylinder 607, compresses the refrigerant gas sucked from the suction hole 614 of the cylinder 607 in the compression chamber, and passes through the discharge hole 612. After discharging to the inside of the sealed container 601, it is discharged from the discharge pipe 615 to the outside of the compressor.
Japanese Utility Model Publication No. 61-138882

  However, the hermetic rotary compressor according to the above prior art has a problem that a large discharge noise is generated when the compressed refrigerant is discharged from the discharge hole provided in the bearing flat portion, which constitutes a large configuration for the compressor noise. It was. Further, in terms of performance, there is also a problem that COP is lowered due to an increase in power consumption due to occurrence of overcompression.

  It is an object of the present invention to provide a hermetic rotary compressor for solving the above-described conventional problems.

  In order to solve the above-mentioned problems, the present invention reduces the flow rate of compressed refrigerant discharged from the compression chamber by providing a plurality of discharge holes in any one of the bearing flat portions, thereby reducing the discharge noise.

  Further, by providing a plurality of discharge holes, over-compression is prevented and power consumption is reduced, and furthermore, power consumption is reduced by changing the area of each of the discharge holes.

  According to the hermetic rotary compressor of the present invention, a plurality of compressed refrigerant discharge holes are provided in the bearing flat portion, thereby reducing the discharge speed of the compressed refrigerant, reducing the compressor noise, preventing over-compression and power consumption. Can be reduced. Further, the intake volume efficiency can be improved by changing the plurality of discharge hole areas. Further, the manufacturing cost can be reduced by integrating the valve for closing the discharge hole.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 2 is a cross-sectional view showing a hermetic rotary compressor according to the present invention, and FIG. 1 is a diagram showing a compression mechanism portion of the hermetic rotary compressor according to Embodiment 1 of the present invention. 1 and 2, an electric motor unit 602 and a compression mechanism unit 603 driven by the electric motor unit 602 are installed inside the sealed container 601. The compression mechanism 603 includes a crankshaft 605 having an eccentric part 604 for transmitting the rotational force of the electric motor part 602 to the compression mechanism part 603, a piston 606 that is rotatably fitted to the eccentric part 604, and A cylinder 607 having a cylindrical air chamber, a vane 609 slidably fitted in a vane groove 608 provided in the cylinder 607, and a spring for pressing the vane 609 against the piston 606 (see FIG. (Not shown), a main bearing 610 provided at one end in the axial direction of the cylinder 607, having a bearing portion for holding the crankshaft 605 and having a flat portion closing the one end in the axial direction of the cylinder 607, and the axial direction of the cylinder 607, etc. The cylinder 607, the piston 606, the vane 609, and the main shaft are configured by a sub-bearing 611 having a flat portion installed at the end and closing the cylinder 607. It is characterized in that a plurality including a discharge hole 101 for discharging the compressed refrigerant generated in the compression chamber consists of only 610-by-bearing 611 into the sealed container 601 in the plane of the bearing 610 or 611.

  A valve 102 that closes the discharge hole 101 to prevent backflow of the compressed refrigerant to the compression chamber is also installed in the plurality of discharge holes. The discharge hole A is a conventional position, and the discharge hole B is the rotation angle of the crankshaft 605. It is located in front.

  FIG. 3 shows the relationship between the crankshaft rotation angle and the compression chamber volume. The flow rate of the compressed refrigerant discharged from the discharge hole is proportional to the time change of the compression chamber volume, and since the discharge hole valve opens at the point B, the A part becomes the discharge area, and the discharge hole area is increased here. However, this has a great effect on reducing the discharge noise of the compressed refrigerant by reducing the flow rate of the compressed refrigerant.

  According to the above configuration, by providing a plurality of discharge holes, the compressed refrigerant generated in the compression chamber is simultaneously discharged from the discharge holes A and B when discharged from the discharge holes, and the discharge passage area is increased compared to the conventional case. It is possible to reduce the discharge noise by reducing the compressed refrigerant discharge speed. Further, the expansion of the discharge passage area almost eliminates the refrigerant over-compression phenomenon, thereby reducing power consumption. The compressed refrigerant is discharged only from the discharge hole A after the piston 606 passes through the discharge hole B. However, the compression chamber volume is already small, and a sufficiently low discharge speed can be obtained even with one discharge hole. The two discharge holes shown in FIG. 1 can achieve the same effect when both the main bearing and the sub-bearing are used, and the same effect can be obtained even when there are three or more discharge holes.

(Embodiment 2)
FIG. 4 is a bearing diagram of the hermetic rotary compressor according to the second embodiment of the present invention. In FIG. 4, the area of the discharge holes 101C, D provided in the bearing is changed to 101C <101D.

  In the vicinity of point D in FIG. 3, the amount of change in the compression chamber volume per crankshaft rotation angle is reduced to about half of the maximum value, so that the discharge flow rate from the discharge hole decreases. On the other hand, since the discharge hole volume under the valve expands into the suction chamber after passing through the piston to reduce the intake refrigerant, the smaller the volume, the better the volume efficiency.

  Therefore, by making the area of the discharge hole 101C smaller than the area of the discharge hole 101D, the compressed refrigerant discharge speed and the discharge sound of the A part are reduced, and at the same time, the volume under the valve discharge hole is reduced after the point D, and the intake refrigerant The volumetric efficiency of can be improved.

(Embodiment 3)
FIG. 5 is a cylinder diagram of a hermetic rotary compressor according to the third embodiment of the present invention. A plurality of compressed refrigerant passages are provided at positions on the inner circumference of the cylinder corresponding to the positions of the discharge holes 101E and 101F provided in the bearing. By smoothing the flow of the compressed refrigerant discharged from the compression chamber to the discharge hole of the bearing through the refrigerant passage, the over-compression phenomenon is eliminated and the power consumption is reduced.

(Embodiment 4)
FIG. 6 is a valve diagram of the hermetic rotary compressor according to the fourth embodiment of the present invention. It is characterized by integrating a valve installed in the discharge hole, and reduces installation man-hours and manufacturing costs.

  As described above, the hermetic rotary compressor according to the present invention includes a plurality of compressed refrigerant discharge holes in the bearing plane, thereby reducing the discharge speed of the compressed refrigerant, reducing the compressor noise, and reducing overcompression. Therefore, it can be applied to applications such as air conditioning, refrigeration, and freezing.

The figure which shows the compression mechanism part in Embodiment 1 of this invention. Sectional drawing of the hermetic rotary compressor according to the first embodiment of the present invention. Diagram showing the relationship between crankshaft rotation angle and compression chamber volume change The figure which shows the bearing of the hermetic type rotary compressor in Embodiment 2 of this invention. The figure which shows the cylinder in Embodiment 3 of this invention. The figure which shows the valve | bulb in Embodiment 4 of this invention. Sectional view showing a conventional hermetic rotary compressor

Explanation of symbols

601 Airtight container 602 Electric motor part 603 Compression mechanism part 604 Eccentric part 605 Crankshaft 606 Piston 607 Cylinder 608 Vane groove 609 Vane 610 Main bearing 611 Sub bearing 612 Discharge hole 613 Valve 614 Intake hole 615 Discharge pipe 101 Discharge hole 102

Claims (5)

Inside the sealed container, there is an electric motor part and a compression mechanism part driven by the electric motor part, a crankshaft for transmitting the rotational force of the electric motor part to the compression mechanism part, and rotation to the crankshaft eccentric shaft part A piston that is freely fitted and installed, a cylinder having a cylindrical air chamber, a vane that is slidably fitted into a vane groove provided in the cylinder, and an axial direction of the cylinder The compression mechanism part is composed of a main bearing having a flat part provided at one end and provided with a discharge hole of the compression mechanism part, and a sub-bearing having a flat part installed at the other axial end of the cylinder and closing the cylinder. A hermetic rotary compressor configured to have a plurality of discharge holes for discharging compressed refrigerant in a flat portion of either the main bearing or the sub-bearing. A hermetic rotary compressor, wherein the discharge hole position according to claim 1 is installed at a position shifted by a rotation angle of the crankshaft. A hermetic rotary compressor having different discharge hole areas according to claim 1 and 2. A hermetic rotary compressor having a plurality of discharge gas discharge passages installed in the cylinder according to claim 1, 2 or 3. A hermetic rotary compressor comprising a valve for closing the plurality of discharge holes according to claim 1, 2, 3, 4.

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