KR101074104B1 - Scroll fluid machine - Google Patents

Abstract

The present invention relates to a scroll fluid machine, comprising: a housing, a fixed scroll fixedly mounted to an inner wall of the housing, and a swing scroll coupled with a fixed scroll to pivot with respect to the fixed scroll. Each of the fixed scroll and the pivoting scroll is formed with an involute curved wrap projecting from one surface of the hard plate, and the first base circle center forming the wrap of the fixed scroll is eccentric with the center of the cross section of the housing. The center of the second base circle forming the wrap is eccentric with the center of the turning scroll slab.

According to the scroll fluid machine according to the present invention, it is possible to reduce the inner diameter of the housing than the conventional, thereby reducing the appearance size of the fluid machine has the effect that can provide a more compact fluid machine.

Fluid Machinery, Fixed Scrolls, Slewing Scrolls, Wraps, Involutes, Foundation Circles, Housings

Description

Scroll Fluid Machine {SCROLL FLUID MACHINE}

TECHNICAL FIELD The present invention relates to a scroll fluid machine, and more particularly, to a scroll fluid machine for reducing the diameter on the external cross section of a fluid machine consisting of components such as swing scrolls and fixed scrolls.

Compressors applied to the refrigerating and air conditioning apparatus are disclosed in various types, such as reciprocating, rotary and scroll compressors, depending on their operation.

Here, the reciprocating compressor is a compressor in which a piston reciprocates in a cylinder and sucks, compresses, and discharges a working fluid, that is, a refrigerant, and a rotary compressor is a compressor in which a compressor rotates while a rotor rotates in a cylinder. .

On the other hand, the scroll compressor is a type of compressor that sucks, compresses, and discharges the refrigerant during one rotation of the scroll formed between the fixed scroll and the swing scroll.

Hereinafter, a scroll compressor according to the prior art will be described with reference to FIG. 1.

As shown, the scroll compressor according to the prior art is a housing 120, the fluid suction chamber 100 and the fluid discharge chamber 110 is formed, one end is installed through the bearing in the housing 120 and the other side is The rotating shaft 140 is rotatably installed on the main frame 130 coupled to the interior of the housing 120, and the drive pin 150 is installed in the housing 120 and is installed at the tip of the rotating shaft 140. It includes a combined swing scroll 200 and the fixed scroll 300 is installed in the housing 120 and coupled to the swing scroll 200 to compress the fluid.

On the other hand, the housing 120 is composed of a front housing 121 and the rear housing 122, the rear housing 122 is provided with a fluid suction chamber 100, and the inner main surface of the front housing 121 and The fluid discharge chamber 110 is provided between the fixed scrolls 300.

In addition, the interior of the housing 120, the motor 160 for rotating the rotating shaft 140 from the rear, the main frame 130, the thrust bearing 170, the turning scroll 200, fixed scroll 300 in order Are placed as.

Here, the rotation shaft 140, the rotation is supported freely by a bearing installed in the main frame 130 and the rear housing 122, the drive end 150 eccentrically by a predetermined amount relative to the center of the shaft at its front end It is installed, the pivoting scroll 200 is coupled to the drive pin 150.

In addition, the fixed scroll 300 is coupled to the pivoting scroll 200 coupled to the driving pin 150 of the rotary shaft 140, and the opposite surface of the pivoting scroll 200 and the fixed scroll 300 is formed of fluid. To realize the compression effect, the vortex wraps are formed to protrude from each other.

Therefore, the fluid is compressed to a high pressure between the fixed scroll 300 and the wrap of the swing scroll 200 in accordance with the swing of the swing scroll 200.

On the other hand, since the swing scroll 200 receives a strong thrust load when compressing the fluid, in order to obtain a smooth swing motion of the swing scroll 200 while supporting the thrust load, that is, the rear side surface of the swing scroll 200, that is, A thrust bearing 170 is interposed between the surface opposite to the surface on which the wrap is formed and the main frame 130.

In addition, a discharge hole (not shown) is formed in the fixed scroll 300 to discharge the fluid compressed in the center thereof to the fluid discharge chamber 110, and a discharge valve may be formed in the discharge hole of the fixed scroll 300. 180) is installed to prevent backflow of the fluid.

On the other hand, the fixed scroll 300 is provided with a rotation preventing unit 190 for preventing the rotation, such as old dam ring.

2A and 2B are schematic views showing the turning scroll and the fixed scroll of FIG. 1, and FIGS. 3A and 3B show the turning scroll of FIGS. 2A and 2B turning against the fixed scroll. A schematic drawing is shown.

The turning scroll 200 and the fixed scroll 300 shown in FIGS. 2A and 2B show a circular border and a wrap formed therein, respectively, based on the outermost wrap.

The center of the first base circle 311 forming the involute curved first wrap 310 formed on the fixed scroll 300 has the same position as the center of the inner surface on the cross section of the housing, in particular, the front housing 121. The center of the second base circle 211 forming the involute curve-shaped second wrap 210 formed on the pivoting scroll 200 has the same position as the center of the pivoting scroll deck.

In the drawing, reference numeral 121a, which has not been described, is a virtual circle having a center in the cross section of the front housing 121, and 220 is a virtual circle having a center of a rotating scroll slab.

Therefore, as shown in FIGS. 3A and 3B, at the time of turning of the turning scroll 200, the edge of the turning scroll 200 is always a part of the turning scroll 200 without exactly overlapping the edge of the fixed scroll 300. It is always in a state of protruding further radially outward from the edge of the fixed scroll 300.

In addition, the inner circumferential surface of the front housing 121 is spaced apart by a distance protruding from the rim as the pivoting scroll 200 rotates from a circular rim formed on the outermost lap of the fixed scroll 300.

Compressor made in such a configuration and coupling relationship is enough to reduce the diameter on the cross-section, if not solved there is a problem that does not meet the current trend of designing and producing a compact product.

SUMMARY OF THE INVENTION An object of the present invention is to provide a scroll fluid machine capable of reducing the appearance size of the scroll scroll and fixed scroll as a component.

The scroll fluid machine of the present invention devised to achieve the above object includes a housing, a fixed scroll fixedly installed on the inner wall of the housing, and a rotating scroll coupled with the fixed scroll to pivot with respect to the fixed scroll. In the scroll fluid machine, the fixed scroll and the pivoting scroll is formed with an involute curved wrap projecting from one surface of the hard plate, respectively, the first base circle center forming the wrap of the fixed scroll is the cross-sectional center of the housing And a second base circle center eccentric with the center of the swing scroll deck to form the wrap of the swing scroll.

The eccentric direction of the center of the first foundation circle from the center of the cross section of the housing is the direction toward the inner end of the fixed scroll wrap, and the eccentric direction of the center of the second foundation circle from the center of the pivoting scroll slab is the pivot scroll. It is characterized in that the inner end of the wrap is the opposite of the direction facing.

The straight line connecting the center of the first foundation circle and the cross-sectional center of the housing is parallel to the tangent of the inner end of the fixed scroll wrap, and the straight line connecting the center of the second foundation circle and the pivoting scroll slab is the pivot. And parallel to the tangent of the inner end of the scroll wrap.

According to the scroll fluid machine according to the present invention, it is possible to reduce the inner diameter of the housing than in the prior art, thereby reducing the external size of the fluid machine to provide a more compact fluid machine.

In addition, there is also an effect that can reduce the appearance size of a system having a fluid machine, such as a compressor, a pump as one component.

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

Duplicate description will be omitted for the same configuration as the prior art, and the same reference numerals as in the prior art are used together.

Scroll fluid machine according to the invention, the fluid suction chamber 100 and the fluid discharge chamber 110, the housing 120 is formed, one end is installed through the bearing in the housing 120 and the other side is the housing ( Rotating shaft 140 is rotatably installed on the main frame 130 coupled to the inside of the 120, and the swing pin is installed in the housing 120 and coupled to the driving pin 150 installed at the tip of the rotating shaft 140 And a fixed scroll 300 installed inside the housing 120 and coupled to the pivoting scroll 200 to compress the fluid.

On the other hand, the housing 120 is composed of a front housing 121 and the rear housing 122, the rear housing 122 is provided with a fluid suction chamber 100, and the inner main surface of the front housing 121 and The fluid discharge chamber 110 is provided between the fixed scrolls 300.

In addition, the fixed scroll 300 is coupled to the pivoting scroll 200 coupled to the driving pin 150 of the rotary shaft 140, and the opposite surface of the pivoting scroll 200 and the fixed scroll 300 is formed of fluid. To realize the compression effect, the vortex wraps are formed to protrude from each other.

Accordingly, the fluid is compressed to a high pressure between the fixed scroll 300 and the wrap of the swing scroll 200 as the swing scroll 200 rotates.

4A and 4B are schematic diagrams showing turning scrolls and fixed scrolls respectively in an embodiment of the present invention, and FIGS. 5A and 5B are schematic diagrams showing a state in which the turning scroll rotates with respect to a fixed scroll in an embodiment of the present invention. Drawing.

Hereinafter, the combined positional relationship of the housing, the revolving scroll 200 and the fixed scroll 300 will be described.

The turning scroll 200 and the fixed scroll 300 shown in FIGS. 4A and 4B show a circular rim formed on the outermost lap and a lap formed therein, respectively.

On the other hand, the rotating scroll 200 and the fixed scroll 300 is actually installed inside the fluid machine, each of which has a slightly larger appearance than the circular rim, it is natural, in the following to the outermost wrap for easy explanation It demonstrates based on the circular border formed.

The housing is centered at the center on its cross section, as shown in FIG. 4B.

Meanwhile, an involute curved first wrap 310 is formed on one surface of the flat hard plate of the fixed scroll 300.

Similarly, an involute curved second wrap 210 is formed on one surface of the flat hard plate of the pivoting scroll 200, and the second wrap 210 of the pivoting scroll 200 is formed of the fixed scroll 300. 1 is installed to turn along the wrap (310).

The first and second wraps 310 and 210 may have an involute curve shape based on the first and second base circles 311 and 211 having the centers of the first and second base circles, respectively.

In the drawing, reference numeral 121a, which has not been described, is a virtual circle having a center on a cross section of the housing, and 220 is a virtual circle having a center of a rotating scroll plate.

In the embodiment of the present invention, as shown in FIGS. 4A and 4B, the center of the first base circle 311 is eccentric with the center of the housing and the center of the second base circle 211 is eccentric with the center of the rotating scroll plate.

In addition, the eccentric direction of the first base circle center 311 from the center of the cross section of the housing is a direction toward the inner end of the first wrap 310.

Here, the straight line connecting the center of the first base circle 311 and the center of the housing is preferably parallel to the tangent of the inner end of the involute curve forming the first wrap (310).

In addition, the eccentric direction of the center of the second base circle 211 from the center of the turning scroll plate is opposite to the direction toward the inner end of the second wrap (210).

Here, it is preferable that the straight line connecting the center of the second base circle 211 and the center of the rotating scroll plate is parallel to the tangent of the inner end portion of the involute curve forming the second wrap 210.

In such a configuration, the radius of the first and second foundation circles 311 and 211 are the same as in the prior art, and an ingot for forming the first and second wraps 310 and 210 from the first and second foundation circles 311 and 211. Assuming that the loosening angle of the lute curve is also the same as in the related art, as shown in FIGS. 5A and 5B, the diameter of the involute curves of the first and second wraps 310 and 320 may be reduced due to the characteristics of the involute curve formation. Therefore, since the inner diameter of the front housing 121 may be reduced as the diameter of the first and second wraps 310 and 320 decreases, the overall appearance size of the housing 120 may be reduced accordingly.

In the above description, the fixed scroll 300 and the swinging scroll 200 are installed only in a scroll compressor that compresses a fluid such as a refrigerant and discharges them at high pressure. However, the fixed scroll 300 and the swinging scroll 200 are not necessarily limited thereto. It is also applicable to various other fluid machines composed of scrolls 200 and the like.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. Or modifications may be possible.

1 is a cross-sectional view showing a scroll compressor according to the prior art.

2A and 2B schematically illustrate the turning scroll and the fixed scroll of FIG. 1;

3A and 3B schematically show a state in which the turning scrolls of FIGS. 2A and 2B turn relative to a fixed scroll;

4A and 4B schematically illustrate a pivoting scroll and a fixed scroll, respectively, in an embodiment of the invention.

5A and 5B schematically show a state in which the swinging scroll pivots with respect to the fixed scroll in an embodiment of the invention.

*** Explanation of symbols for the main parts of the drawing ***

100: fluid suction chamber 110: fluid discharge chamber

120: housing 121: front housing

121a: Virtual circle representing the center of the housing

122: rear housing 130: mainframe

140: rotation axis 150: drive pin

160: motor 170: thrust bearing

180: discharge valve 190: rotation prevention part

200: turning scroll 210: second lap

211: second foundation member

220: an imaginary circle representing the center of a turning scroll slab

300: fixed scroll 310: first wrap

311: first basic member

Claims (3)

A scroll fluid machine comprising a housing, a fixed scroll fixedly mounted to an inner wall of the housing, and a swing scroll coupled with a fixed scroll to pivot with respect to the fixed scroll. The fixed scroll and the swing scroll are formed by projecting an involute curve wrap from one surface of the hard plate, respectively. A first base circle center forming a wrap of the fixed scroll is eccentric with a cross-sectional center of the housing, a second base circle center forming a wrap of the orbiting scroll is eccentric with a center of a turning scroll deck, The eccentric direction of the center of the first base circle from the center of the cross section of the housing is the direction toward the inner end of the fixed scroll wrap, And the eccentric direction of the center of the second base circle from the center of the pivoting scroll slab is opposite to the direction toward the inner end of the pivoting scroll wrap. delete The method of claim 1, The straight line connecting the center of the first base circle and the cross-sectional center of the housing is parallel to the tangent of the inner end of the fixed scroll wrap, And a straight line connecting the center of the second base circle and the center of the pivoting scroll slab is parallel to the tangent of the inner end of the pivoting scroll wrap.

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