JPH01130083A - Scroll compressor - Google Patents

Abstract

PURPOSE:To improve operation efficiency without weakening the strength of a movable scroll by forming the inside end section of No.2 spiral body in such a way as to be gradually thinned toward its tip end while being tapered. CONSTITUTION:The inside end 25 of No.2 spiral body 10 is formed in such a way as to let the inner circumferential surface 26 of it be gradually thinned toward its tip end while being tapered with the anglo theta used. The spiral body 10 on the side of No.2 movable scroll 9 is formed into a tapered one, the base end section of which is thereby thicker than its tip end in such a way as to be strengthened so that it shall sufficiently withstand excessive pressure applied when fluid is compressed and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention provides a discharge ball i in the center of the end plate of a fixed scroll.
Regarding the thrown scroll compressor.

(b) Prior Art A conventional scroll compression shell is disclosed in Japanese Patent Application Laid-Open No. 61-226590, which precedes the present invention.

By cutting out the inner end of the spiral body of the movable scroll on the open side of its inner periphery and ensuring a larger refrigerant discharge passage by the cutout, compressed refrigerant at a predetermined compression ratio can be smoothly discharged from the discharge port, improving operational efficiency. We are working to improve this.

However, in this type of scroll pressure 81, since the base end of the thinly wound body is notched thinly and uniformly in the same way as the tip, the spirally wound body is thinned by the thickness of the base end due to the notch. The strength decreases, and there is a risk that this spiral-wound body may be damaged due to excessive pressure during liquid compression.

(c) Problems to be Solved by the Invention The present invention addresses the above-mentioned points and aims to improve the operating efficiency of the scroll pressure &[ without causing a decrease in the strength of the retractable scroll.

B.) Means for solving inter-flooding points The present invention provides a fixed scroll having a first spiral body and a discharge port provided in an end plate, and a second spiral winding body that faces and meshes with the %10 spiral body. The refrigerant sucked between the spiral bodies is gradually compressed by rotating the refrigerant scroll whose body is provided on the end plate and the movable scroll on a circular orbit, and moves the refrigerant from the outside toward the middle part. and an electric element for discharging from a discharge port, and the inner end of the second spiral body is tapered so that the inner circumferential surface thereof becomes gradually thinner toward the tip. .

(e) Function According to the present invention, the refrigerant sucked between the spiral bodies of the fixed scroll and the movable scroll is gradually compressed and moves from the outside of both spiral bodies toward the center, to a predetermined level. After reaching the compaction ratio, it is discharged from the empty space in the final stage between the inner ends of both the thin spiral bodies through the discharge port, and upon discharge, its taper is removed along the tapered surface of the spiral body on the movable scroll side. The discharge passage is enlarged by that amount, allowing smooth discharge, and therefore the operating efficiency of the scroll compressor is improved. In addition, the spiral body on the 9-cut scroll side is tapered, so the base end is thicker than the tip, making it difficult to maintain strength. Therefore, the spiral body on the movable scroll side is susceptible to excessive pressure when compressing liquid. It will be able to withstand it well.

(f) Example Next, an example of the present invention will be described.

In FIG. 12, (1) is a closed container, which houses an upper compression element (2) and a lower electric element (3).

14) is a frame forming a part of the compressed wood 12), and is attached to the inner wall of the 1st layer closed container (1). (
5) is a fixed scroll housed in a frame 14), which has a disc-shaped end and a first spiral body (7) with an involute curve shape in the center of 16), and a skirt part on the outer shell. (8) is formed. (9) is a Machisuke scroll that was cast in contrast to the defined scroll 15), t4f
First spiral body 17) A second spiral body +1tll which rotates and engages with K is formed on the bridge board (11). The second thin winding body U2 is formed with an involute curve arbitrarily curved in the same way as the spiral winding body 17) of the MU record 1. U is an Oldham ring fixed to +IJ frame (4),
By locking the movable scroll (9), relative rotation of the first scroll (9) with respect to the fixed scroll (5) is prevented. 1 is a suction pipe, which is open to the space (141) defined by the frame 141 and the fixed scroll (5).The air in the space 114 is compressed between the fixed scroll 151 and the movable scroll (9). It is accommodated in room 151. (1b) is a discharge chamber that communicates with the compression chamber (151 through the discharge port 0η), and the fixed scroll (5)
is defined by an end plate (6) and the closed container (1).

u81 is a discharge pipe communicating with the discharge chamber +161, and is provided through the closed container (1).

u! J is the stator that forms part of the electric element (3), and the circle is the rotor disposed inside the stator (1).
(Company) is a rotating shaft that is the same as the rotor ■. 2 is a crank portion formed at the upper end of the rotating shaft, which engages with the boss group (2) of the movable scroll 19) via a sliding bearing. In the electric element (3), a gaseous refrigerant is sucked between the movable scroll (9) and the fixed scroll +5) by revolving the discontinued scroll (9) on a circular orbit, and the gaseous refrigerant is Both spiral bodies (7)
It functions to remove the space together with the space (15a) formed between the holes.

The second spiral body (10) is shown in FIGS. 2 to 5.
As shown in the figure, the inner peripheral surface of the inner end (5) is tapered at an angle (θ) so that it gradually becomes thinner toward the tip. 2
6a), as described below, when the predetermined compression ratio is reached.
The inner end (7a) of the spiral wound body 17) is set in contact with the inner end (7a). Further, a tip seal @ for airtightness is provided on the '4 surface of the second spiral body tll.

Next, the vJ operation of the scroll compressor will be explained.

In the scroll compressor, when operating at a predetermined compression ratio, the suction refrigerant (GS) is first started at 1f fine + Jd in the compression start process shown in FIG. Compression is continued in the +90° process, and the compressed refrigerant (GC) is gradually compressed by rotating the scroll (9) counterclockwise until the compression starts +180° as shown in Figure 6 (C).
° In the process, the compressed refrigerant (GC) is transferred to the suction refrigerant (GS)
When the predetermined compression ratio is reached, the starting end (26B) of the tapered surface (2) becomes the inner end (26B) of the first spiral body 171 on the fixed scroll +5) side.
7a), after which the compressed refrigerant (GC) comes to be discharged from the discharge port stone along the tapered surface (support), and the compression starts +270° as shown in FIG. 6(d).
In the process, the compressed refrigerant (GC) at a predetermined pressure continues to be discharged, and therefore the compressed refrigerant (GC) rises along the same plane of the taper and smoothly reaches the discharge port ( It begins to be discharged from 1η.

In addition, the second spiral body (1) on the movable scroll (9) side is tapered so that the base is thicker than the tip and maintains strong sensation. It will be able to withstand it well.

FIG. 7 shows a second embodiment, in which the tapered surface of the inner end a) of the second spiral body q is formed into a liE shape in a plan view, and the compressed refrigerant ( GC) discharge passage gradually expands.

FIG. 8 shows a sixth embodiment, in which the tapered flat surface of the inner end □□□ of the second thinly wound body dω is formed into a semicircular shape in a plan view, and the circular This corresponds to the shape of the discharge port (17).

FIG. 9 shows a fourth embodiment. In this embodiment, the inner side of the second spiral body U is formed into a rectangular shape in a plan view, and the compressed refrigerant (GC) is This means that the discharge passage of the pipe expands sharply.

In the second to "%4% embodiments, other parts not particularly explained are constructed in the same manner as in the first embodiment described above.

(G) Effects of the Invention Since the present invention is constructed as described above, the compression that is compressed to a predetermined compression ratio between both the spiral winding bodies of the fixed scroll and the movable scroll and reaches the inner end between both the spiral winding bodies. The refrigerant is smoothly discharged from the discharge port along the tapered surface of the second tapered body on the side of the 9-young scroll, with the discharge passage gradually expanding by the taper, thus reducing the scroll pressure. can improve operating efficiency. Further, by forming the second spiral body into a tapered shape, the base end portion can be made thicker and stronger than the tip end thereof, and therefore the operating efficiency of the scroll compressor can be improved. This can be achieved without deteriorating the strength of the body.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, FIG. 1 is a vertical cross-sectional view (9), and FIG. 2 is an oTt as a main component.
l] Top view of the scroll, Figure 3 is a partially enlarged top view of the town square scroll, Figure 4 is a sectional view taken along line A-A in Figure 6, Figure 5 is a longitudinal sectional view of the main part, Figure 6 (a) (b) (C
) and (d) are operation explanatory diagrams of each process during compression operation. FIG. 7, FIG. 8, and FIG. 9 are partially enlarged top views of the main components of the second embodiment, the third embodiment, and the fourth embodiment. (31... electric element, (5)... fixed scroll,
(6)... End plate, 17)... First spiral body, (9
)...Movable scroll, U■...Second spiral body,
U...End plate, (Company)...Compression chamber, (171...Discharge port, ■...Inner end, i+281W'1m--
・Inner peripheral surface (tapered surface). Figure 1 Figure 2 Figure 3 Figure 6

Claims (1)

[Claims] 1) A fixed scroll in which a first spiral body and a discharge port are provided on an end plate, and a second spiral body that faces and engages with the first spiral body is provided in the end plate. a movable scroll, and an electric element that causes the movable scroll to revolve on a circular orbit to gradually compress the suction refrigerant between the spiral bodies, move it from the outside toward the center, and discharge it from the discharge port. 2. A scroll compressor, characterized in that the inner end of the second spiral body is tapered so that the inner circumferential surface thereof becomes gradually thinner toward the tip.