JPS63208689A - Sealed type rotary compressor - Google Patents

Abstract

PURPOSE:To prevent the disturbance of the coolant gas flow by covering a semicircular balance weight installed onto the lower edge surface of the rotor of a motor-driven element by a perfectly circular-shaped cup. CONSTITUTION:A perfectly circular-shaped cup 14 made of nonmagnetic material is installed so as to cover a semicircular balance weight 13 installed onto the lower edge surface of the rotor 3 of a motor-driven element. The balance weight 13 and the cup 14 are caulk-fitted by the pin 3a of the rotor 3. Therefore, the flow of coolant gas discharged from a discharge muffler 11 is prevented from being disturbed by the balance weight 13, and the gas flows into the gap part between a stator 22 and the rotor 3 uniformly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a hermetic rotary compressor, and particularly to a hermetic rotary compressor that eliminates turbulence in the flow of refrigerant waste discharged from a compression element into a hermetic container. The aim is to reduce flow path loss and refrigerant noise.

[Conventional technology]

Figure 5 shows this divine compressor shown in Utility Model Application Publication No. 60-61494. In Figure 9, fi+ is a closed container, (2) is the stator of the electric element (A), and (2a) is this stator. The notched groove (3) provided on the outer peripheral surface of the rotor is a rotor of an electric element, and a crankshaft (4) is inserted and fixed therein. (B) is a compression element, which is constructed as follows. That is, (4
a) is the eccentric part of the crankshaft (4), (4b) is its thrust surface, (4c)' is the gas vent hole provided through the axis of the crankshaft (4), and (5) is the crankshaft (4). 4)
The upper bearing (6) supports the upper bearing, and the lower bearing (6) is also installed opposite this, and the cylinder (7) has two poles on both side walls.
It is fixed in a polymerized state with l. (8) is the compression chamber formed between the upper and lower bearings and the cylinder, (9) is the rolling piston attached to the eccentric part (4a) of the crankshaft (4), and [1υ is the upper bearing (5). A cap-shaped refrigerant gas discharge muffler (11a
) is a discharge hole for compressed refrigerant gas drilled in this discharge muffler αυ. 02 in other countries is a refrigerant gas discharge pipe, u
Reference numeral '5 denotes a semi-circular balance weight attached to the lower end surface of the rotor (3) in order to maintain balance with the eccentric portion (4a).

In the above configuration, the crankshaft (4) together with the rotor (3)
is driven and refrigerant gas is supplied to the low pressure side of the compression chamber (8), this refrigerant gas is supplied to the eccentric part (4) of the crankshaft (4).
It is compressed by a rolling piston (9) fitted in a) on the high pressure side separated by vanes (not shown). The refrigerant gas compressed in this way passes through the discharge muffler αυ and is discharged from the discharge hole (11a) into the sealed container ill as shown by the solid line arrow in Figure 2, and is then discharged from the stator (2) and rotor (3).
Pass through the gap and notch groove (2a).

The refrigerant is supplied from the discharge pipe (12) to a predetermined refrigerant circuit.

[Problem that the invention seeks to solve]

With the structure described above, in the conventional compressor, when high-pressure refrigerant gas is discharged from the discharge hole (11a) toward the lower end surface of the rotor (3), the lower end surface of the rotor (3) Since the semicircular arc-shaped balance weight α3 is asymmetrically superposed, the flow of refrigerant gas is disturbed by the balance weight, which causes flow path loss and refrigerant noise within the closed container. This invention seems to solve the above problems.

The purpose is to eliminate disturbances in the flow of refrigerant gas caused by balance weights.

[Means for solving problems]

In the case of this invention, a semicircular arc-shaped balance weight attached to the lower end surface of the two-rotor (3) is backed by a perfectly circular cup.

[Effect]

In the case of this invention, the refrigerant gas discharged from the discharge hole of the discharge muffler hits the perfect circular cup attached to the lower end surface of the rotor (3) so as to cover the balance weight, thereby ensuring a uniform flow. It flows into the gap between the stator and rotor and into the notched grooves.

〔Example〕

An embodiment of this invention will be described below. That is, in FIG. 1, the same number PJ'r as in the conventional one shown in FIG.
The present invention is particularly characterized in that a perfectly circular cup A4 made of a non-magnetic material is provided to cover the semi-circular balance way 1-83 provided on the lower end surface of the rotor (3). It is something.

Figure 2 shows the balance weight 0 for the rotor (31).
FIG. 3 is an exploded perspective view showing a coupling structure between the cup α4 and the cup α4.

FIG. 3 is a perspective view showing a state in which these connections have been completed, and (3a) in FIG.
The balance weight α moat, which is asymmetrically provided on the lower end face of the rotor (3), is made of non-magnetic material. Since the refrigerant gas is covered by a perfectly circular cup 84), the flow of refrigerant gas discharged from the discharge muffler αυ is not disturbed by the balance weight 0.
Since the refrigerant flows uniformly into the gap between the stator (2) and rotor (3) and into the notched groove (2a), flow path loss and refrigerant noise inside the closed container ill are effectively reduced. will be done.

Note that since the cup α4 is made of a non-magnetic material such as aluminum or copper, it does not adversely affect the characteristics of the electric element.

The above explanation is based on the case where the balance weight 0 and the cup α→ that covers it are formed separately, but this cup and the balance weight tiger may also be integrally formed as shown in another embodiment shown in FIG. 4. good.

〔Effect of the invention〕

Since the hermetic rotary compressor of the present invention is constructed as described above, the flow of the refrigerant gas discharged from the discharge muffler is not disturbed by the balance weights provided on the first and second sides. Since the refrigerant flows uniformly into the gaps and notches between the stator and rotor, it has the effect of effectively reducing flow path loss and refrigerant noise within the closed container.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an embodiment of the hermetic rotary compressor of the present invention, FIG. 2 is an exploded perspective view of the main parts thereof, and FIG. 3 is a perspective view showing the assembled state of the compressor shown in FIG. FIG. 4 is an exploded perspective view corresponding to FIG. 2 showing another embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of a conventional hermetic rotary compressor. In the figure, (A) is an electric element, (B) is a compression element, (11
is a closed container, (3) is a rotor, 0.1 is a balance weight, and α4) is a cup. In other figures, the same reference numerals indicate the same parts.

Claims (4)

[Claims] (1) A motorized element having a rotor that is housed in the upper part of the sealed container and has a balance weight asymmetrically provided on the lower end surface, and a compression element that is stored in the lower part of the sealed container and located below the motorized element. , in which the refrigerant gas is discharged from the compression element into the closed container, the balance weight is covered with a perfectly circular cup that is superposed and fixed to the lower surface of the rotor. compressor. (2) The hermetic rotary compressor according to claim 1, wherein the cup is made of a non-magnetic material. (3) The hermetic rotary compressor according to claim 1, wherein the cup is caulked to the lower end surface of the rotor together with the balance weight. (4) The hermetic rotary compressor according to claim 1, wherein the cup is integrally molded with the balance weight.