JPS63219893A - Rotary type sealed compressor - Google Patents

Abstract

PURPOSE:To prevent the generation of turbulent flow noise by using the upper and lower discharge valves which are installed at the discharge holes on the upper and lower edge plates and each of which has different plate thickness. CONSTITUTION:The coolant inhaled from a suction port 7a by the eccentric movement of a roller 5 is compressed in heat insulation and discharged into mufflers 13 and 14 from discharge holes 8a and 9a by opening a plate-shaped upper discharge valve 11 and a lower discharge valve 12. Each plate thickness of the upper and lower discharge valves 11 and 12 is made different each other. Since the valve opening timing due to the coolant compressed in a cylinder 7 deflects, two kinds of high pressure coolant do not converge in the upper part muffler 13, and generation of turbulent flow noise is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary hermetic compressor used in a refrigerant cycle circuit of a general household air conditioner or the like.

(Prior Art) A conventional rotary hermetic compressor will be explained with reference to FIG.

In the figure, the one-rotation hermetic compressor is 1. An electric motor consisting of a stator 1 and a rotor 3 to which a rotating shaft 2 is fixed is mounted on the top.
Also, a roller 5 that is driven by a crankshaft 4 directly connected to the rotation shaft 2 and moves eccentrically, a cylinder 7 that forms a cylindrical space 6 in which this roller 5 rolls, and both upper and lower end surfaces of this cylinder 7 are provided. An upper end plate 8 and a lower end plate 9 are fixed and seal the cylindrical space 6 together with the inner wall surface of the cylinder 7, and at the same time support the upper and lower end shafts of the crankshaft 4.
A rotary compressor consisting of
It is press-fitted into the 0. Note that the upper end plate 8 supports the upper end shaft of the crankshaft 4 and the rotating shaft 2 of the electric motor directly connected thereto in the same bearing hole.

The cylinder 7 is provided with vanes (not shown) that freely reciprocate in the radial direction while constantly contacting the outer circumferential surface of the roller 5 with an appropriate surface pressure. A suction lower a that opens in the direction and discharge ports 7b and 7c that are cut out at both ends on the axis are provided. Figure 2 shows the suction lower a and the discharge port 7b.
7c is an expanded view of a plane containing 7c and 7c, respectively.

The upper end plate 8 and the lower end plate 9 have discharge holes 8a and 9 connected to the above-mentioned discharge boats 7b and 7c, respectively.
a, and an upper discharge valve 11 and a lower discharge valve 12 are attached to the opening thereof.

Furthermore, an upper muffler 13 and a lower muffler 14 made of sheet metal are fixed so as to cover the upper end plate 8 and the lower end plate 9, and in order to communicate the space formed by the end plate and the muffler, Communication holes 7d, 8b and 9b are provided in straight lines in the end plates 8 and 9, respectively. Note that a discharge pipe 15 for delivering compressed refrigerant is attached to the upper end of the closed container 10.

Explaining the operation of the rotary hermetic compressor configured in this way.When power is input to the 6-rotary hermetic compressor, the electric motor starts operating, and the crankshaft 4, which is directly connected to the rotating shaft 2, starts operating.
The roller 5 driven by the roller 5 moves eccentrically within the cylindrical space 6 of the cylinder 7, and the space formed by the inner wall surface of the cylindrical space 6, the outer peripheral surface of the roller 5, and the plane of the vane (not shown) expands.
By repeating the contraction, the refrigerant sucked from the suction lower a is adiabatically compressed and discharged from the discharge holes 8a and 9a, respectively, into an elastic plate-shaped upper discharge valve 11 and a lower discharge valve 12 [both with valve holders (not shown)]. The refrigerant that has entered the lower muffler 14 is pushed open and discharged into the upper muffler 13 and the lower muffler 14.
7d and 8b in order and merge inside the upper muffler 13. The refrigerant that has merged into the upper muffler 13 is transferred to the closed container 10.
The refrigerant is ejected from the upper discharge pipe 15 to external equipment through a refrigerant passage (not shown) provided in the motor section.

(Problems to be Solved by the Invention) However, in the above configuration, when the upper discharge valve 11 and the lower discharge valve 12 are pushed open, the refrigerant that is simultaneously spouted into the upper muffler 13 and the lower muffler 14, respectively, is removed from the upper muffler. 13, the mixture becomes turbulent, which not only generates turbulent noise, but also increases discharge resistance, resulting in overcompression, resulting in a decrease in performance.

Further, during liquid compression, the liquid pressure in the lower muffler 14 increases extremely, so there is a problem that the lower muffler 14 is damaged.

The present invention solves the above problems and provides a rotary hermetic compressor that does not generate turbulent noise, has low discharge resistance, and does not cause accidents when compressing liquid.

(Means for Solving the Problems) In order to solve the above problems, one aspect of the present invention uses an upper discharge valve and a lower discharge valve having different plate thicknesses.

(Function) With the above configuration, the opening timings of the upper discharge valve and the lower discharge valve are shifted, so that turbulence noise and discharge resistance are reduced. Also,
Since the internal pressure of the lower muffler does not increase during liquid compression, accidents that damage the lower muffler do not occur.

(Example) An example of the present invention will be described with reference to FIG. The rotary hermetic compressor according to the present invention differs from the conventional example shown in FIG. 2 only in that the plate thicknesses of the upper and lower discharge valves 11 and 12 are different from each other, so the numbers of the component parts remain the same as in the conventional example. The explanation of its configuration will be omitted.

The operation of the embodiment having the above configuration will be explained. Since the plate thicknesses of the upper discharge valve 11 and lower discharge valve 12 are different, the refrigerant compressed in the cylinder 7 is pushed open at different timings, so the high-pressure refrigerant discharged into the upper muffler 13 and the lower muffler Since the high-pressure refrigerant discharged into the upper muffler 14 does not merge in the upper muffler 13, no turbulence noise is generated and the discharge resistance is small.Also, the lower muffler 14 does not reach high pressure even during liquid compression, so there is no possibility of damage. (Effects of the Invention) As explained above, according to the present invention, the rotary compressor has an upper discharge valve and a lower discharge valve provided in the discharge holes of the upper and lower end plates constituting the rotary compressor. Since valves with different plate thicknesses are used for the discharge valves, the opening timings of the valves are shifted and turbulent flow and turbulent noise that occur when compressed high-pressure refrigerant joins in the upper muffler can be prevented.

In addition, the internal pressure of the lower muffler does not rise even during liquid compression, so
No damage to the lower muffler occurs. Therefore, a rotary hermetic compressor with good performance, high reliability, and low noise can be obtained.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are sectional views showing an embodiment of the rotary hermetic compressor according to the present invention and a conventional example, respectively. 1... Stator, 2... Rotating shaft, 3... Rotor, 4... Crankshaft, 5... Roller. 6...Cylindrical space, 7...Cylinder, 7a...
・Suction port, 7b, 7c...Discharge boat, 7d
, 8b, 9b...Communication hole, 8...Upper end plate,
8a, 9a...Discharge hole, 9...Lower end plate, 1
0... Sealed container, 11... Upper discharge valve, 12...
Lower discharge valve, 13... Upper muffler, 14... Lower muffler, 15... Discharge pipe. Patent Applicant: Matsushita Electric Industrial Co., Ltd. 1・Sday-7 2-! ] Glaze 3 ・Rotor 4... Crankshaft 5...Rotor rotor ゛Circular angle threshold 7 ・Ralin 7゛7a...Coughing lower b, 7c...υEヱkeyd 7d, 8b, 9b... Tadongguchi 8a, 9a ・ν soil, payout 8゛E Shubao 9 Shimokaba) good IQ... 1 control win t) 11゛゛゛ discharge 12-lower part 13... engineer mafuku 14 ・Lower part 77 15・Discharge pipe 1st reason; d == 1 ・・Sudek 2・・Rotating shaft 3・・Rotor 4・Crankshaft 5・Rotaro・・Circular square closed 7 ... Cylinder 70 ... Lower b, 7c including VIL - Discharge boat 7d, 8b, 9b ... Communication port 8a, 9a ... Discharge≦Crush 8 ... L Shobao 9 ... Bottom Shubao X Liang 1o...1 Kan! s-device 11, scolding 12, lower part 13, engineer mafuku 14, lower leaf mafuku 15, vl & tube figure 2

Claims (1)

[Claims] A rotary compression type in which elastic plate-shaped discharge valves are installed in the discharge holes provided in the upper and lower end plates, which close both the upper and lower end surfaces of the cylinder to form a cylindrical space, and a muffler is attached to each. A rotary hermetic compressor in which a rotary compressor and an electric motor directly connected to the rotary compressor are housed in a hermetically sealed container, and the upper and lower discharge valves have different plate thicknesses.